Abstract

A multi-support collaborative advancement scheme judgment and formulation method, realized by a fully mechanized coal mining face multi-support collaborative advancement scheme determination system, and comprising a data acquisition system and a post-processing system, wherein the post-processing system comprises a data processing system, a result judgment system, a comprehensive analysis system, a scheme formulation system, and an output and storage system. The multi-support collaborative advancement scheme judgment and control method can, on the basis of the characteristics of a coal mining device, intelligently determine the number of collaborative advancement supports and formulate an advancement scheme, thereby effectively solving the problem of delayed advancement of hydraulic supports due to the excessively fast traction speed of coal mining devices, providing crucial hydraulic support to facilitate the reform towards high-efficiency coal mining, effectively improving the intelligence level of support adjustment and collaborative advancement during coal mining, facilitating improvement of the production efficiency, and ensuring the working safety.

IPC Classes  ?

• E21D 23/12 - Control, e.g. using remote control

Abstract

A non-uniform-strength supporting control method in a cutting process, comprising a data acquisition system and a postprocessing system. The postprocessing system comprises a data processing system, a result determination system, a comprehensive analysis system, and an output and storage system; and the supporting force of each hydraulic support can be adjusted in real time, to adapt to supporting force changes caused by advancement of the hydraulic supports. By comprehensively considering the mechanical properties of coal rock and the supporting requirements in the advancement process, the method uses an advanced control algorithm and a real-time data feedback mechanism to effectively solve the technical problem that in the advancement process, insufficient supporting force of the hydraulic supports leads to an instable mine pressure.

IPC Classes  ?

• E21D 15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
• E21D 23/12 - Control, e.g. using remote control

Abstract

An energy accumulator system having an automatic cleaning function, comprising a shell (4). An upper end cover (3) and a lower end cover (7) are installed at the top and the bottom of the shell, respectively; a piston (5) is slidably connected into the shell; the piston is located between the upper end cover and the lower end cover; the piston divides the interior of the shell into a gas chamber (21) and a liquid chamber (20); cleaning assemblies (11) are symmetrically provided on the side of the piston close to the liquid chamber; the upper end cover is provided with a gas hole; the lower end cover is provided with a liquid through hole (10); a hydraulic circuit is formed in the liquid chamber. The piston moves back and forth in the shell along the inner wall of the shell and divides the shell into a gas chamber for storing high-pressure gas and a liquid chamber for storing pure water, the cleaning assemblies are used for cleaning rust spots on the inner wall caused by pure water and particles attached to the inner wall, and the cleaning assemblies are arranged at the position of the piston close to the liquid chamber, and come into contact with the inner wall of the shell during working and are located in the piston when not working. According to the system, particles on the inner wall of the energy accumulator can be automatically cleaned, thereby increasing the service life of the energy accumulator.

IPC Classes  ?

• F15B 1/24 - Accumulators using a gas cushionGas charging devicesIndicators or floats therefor with rigid separating means, e.g. pistons

Abstract

A monitoring probe and monitoring method for corrosion of the inner wall of a hydraulic cylinder. The monitoring probe comprises: a three-way pipe (2), wherein the three-way pipe (2) has a first end communicated with a liquid inlet and a second end communicated with a hydraulic liquid; a base (1) provided at a third end of the three-way pipe (2) and communicated with the third end; a fiber hose (3) having one end communicated with the base (1) and the other end extending into a hydraulic cylinder from the second end, wherein spherical hinges (3.3) and traction wires (3.2) are provided in the fiber hose (3), the traction wires (3.2) pass through traction holes (3.4) of the spherical hinges (3.3) and are arranged along the length direction of the fiber hose (3), one ends of the traction wires (3.2) are communicated with electric winch sets (1.1), and fixing ends of the traction wires (3.2) are arranged close to the other end of the fiber hose (3); and a probe assembly (5) fixedly arranged at the other end of the fiber hose (3). The probe assembly (5), the base (1) and the fiber hose (3) are communicated with the hydraulic cylinder by means of the three-way pipe (2), and the probe assembly (5) enters the hydraulic cylinder along the three-way pipe (2) and can monitor in real time a corrosion condition of the inner wall of the hydraulic cylinder in a working state of the hydraulic cylinder, so that the hydraulic cylinder does not need to be stopped for monitoring, and normal production is not affected.

IPC Classes  ?

• G01N 29/04 - Analysing solids
• G01B 11/27 - Measuring arrangements characterised by the use of optical techniques for measuring angles or tapersMeasuring arrangements characterised by the use of optical techniques for testing the alignment of axes for testing the alignment of axes

Abstract

A hydraulic system cavitation detection system and method based on a thermocouple module. The cavitation detection system comprises: a cavitation adjustment apparatus disposed at one side of a hydraulic pipeline to undergo detection (12), a first thermocouple module (9) disposed on the cavitation adjustment apparatus, a second thermocouple module (13) disposed on the hydraulic pipeline (12), and a detection control center (11) separately electrically connected to the first thermocouple module (9) and the second thermocouple module (13). The detection control center (11) is used for detecting the magnitude of a current generated between the first thermocouple module (9) and the second thermocouple module (13) due to a temperature difference. The cavitation detection method is executed by means of the cavitation detection system, realizing real-time monitoring of the cavitation phenomenon of the hydraulic system. In addition, it is possible to convert the cavitation phenomenon into visual data. Heat released by the bursting of bubbles generated by the cavitation phenomenon in the hydraulic system is converted into an electric signal by means of the thermocouple modules, which is transmitted to the detection control center, thereby improving real-time performance and accuracy of detection of a cavitation phenomenon in the hydraulic system.

IPC Classes  ?

• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
• F15B 21/044 - Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding

Abstract

A three-chamber energy accumulator having adjustable volume, comprising an energy accumulator. The energy accumulator comprises a housing (2), and a liquid chamber, an air chamber and an adjustment chamber formed in the housing (2). An air column is disposed in the air chamber. An adjustment assembly is disposed in the adjustment chamber, and is used to adjust the volume of the air column. A liquid pump (13) is in communication with the liquid chamber by means of a pipe. The three-chamber energy accumulator, by means of independent control of the adjustment chamber, can achieve more accurate and stable control of energy output of the energy accumulator, thereby solving the problem with conventional energy accumulators of unstable release.

IPC Classes  ?

• F16F 9/06 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid

Abstract

A water hydraulic cylinder impact leakage detection test bench based on helium detection, the test bench comprising a test bench body, a water hydraulic cylinder (12), a helium cylinder (14), a sealed container (16) and an impact device, wherein the water hydraulic cylinder (12) is detachably mounted on the test bench body; an outlet end of the helium cylinder (14) is in communication with a rodless cavity of the water hydraulic cylinder (12), and a pressure-reducing valve (13) is mounted between the helium cylinder (14) and the water hydraulic cylinder (12); the sealed container (16) is detachably mounted in a rod cavity of the water hydraulic cylinder (12), and a helium mass spectrometer leak detector (15) is mounted on the sealed container (16); and the impact device is fixedly mounted on the test bench body, is connected to a piston rod of the water hydraulic cylinder (12), and is configured to provide impact power for the water hydraulic cylinder (12). The test bench uses an accumulator (6) as a pressure power source, which can provide rapid, stable and high-flow oil, thereby solving the problem of the pressure and flow of ordinary hydraulic pumps failing to meet test requirements; and compared with traditional impact generation by using hammer dropping, the test bench can precisely control the magnitude of the generated impact by means of the pressure of the accumulator (6), and is safe and reliable.

IPC Classes  ?

• G01M 3/20 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
• G01M 7/08 - Shock-testing

Abstract

A pneumatic hose (4.1)-type infrared thermal imaging-based corrosion detection device for the inner wall of a hydraulic cylinder (6), comprising an infrared thermal imaging probe module (5) used for detection of the inner wall of the hydraulic cylinder (6). The infrared thermal imaging probe module (5) is connected to a pneumatic fiber hose (4), and the pneumatic fiber hose (4) extends out of the hydraulic cylinder (6); a control assembly used for controlling opening and closing of an inlet of the hydraulic cylinder (6) is arranged at the inlet of the hydraulic cylinder (6), and the pneumatic fiber hose (4) extends out of the hydraulic cylinder (6) through the control assembly; the pneumatic fiber hose (4) comprises a plurality of pneumatic hoses (4.1) arranged side by side, the plurality of pneumatic hoses (4.1) are arranged at equal intervals in the circumferential direction and are fixedly connected to the infrared thermal imaging probe module (5), and the movement of the plurality of pneumatic hoses (4.1) is independently controlled. The detection device can directly obtain the corrosion state of the inner wall of the hydraulic cylinder (6), and can provide more accurate and more comprehensive data, the hydraulic cylinder (6) assembly does not need to be disassembled, unmanned operation can be achieved in the whole process, and the efficiency and accuracy of corrosion detection of the inner wall of the hydraulic cylinder (6) are significantly improved.

IPC Classes  ?

• G01N 25/72 - Investigating presence of flaws
• G02B 23/24 - Instruments for viewing the inside of hollow bodies, e.g. fibrescopes
• G01N 21/71 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited

Abstract

A water hydraulic cylinder leakage detection test bench capable of simulating a dynamic load impact, comprising: a water hydraulic cylinder (7), wherein the water hydraulic cylinder (7) comprises a first water cavity (701) and a second water cavity (702), and a leakage detection device (16) is arranged in the first water cavity (701); a hydraulic water loop, wherein the hydraulic water loop is fixedly communicated with the second water cavity (702); a hydraulic cylinder (6), wherein the hydraulic cylinder (6) comprises a first oil cavity (601) and a second oil cavity (602), and a piston end of the hydraulic cylinder (6) is fixedly connected to a piston end of the water hydraulic cylinder (7); and a hydraulic oil loop, wherein the hydraulic oil loop is fixedly communicated with the first oil cavity (601) and the second oil cavity (602).

IPC Classes  ?

• G01M 3/16 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means

Abstract

Disclosed is a sediment classification method and system based on bottom echo information of a deep-sea multibeam water column, falling within the technical field of seabed sediment classification. Multidimensional features of seabed multibeam time series are extracted by using multibeam water column data, and multidimensional features of seabed spots are constructed by fusing an angle response curve; double-waveform spectrum comparison of original sample point waveform with seabed measured point waveform is performed, and two groups of corresponding waveforms are matched by using Cosine Similarity to expand original sample points; and the reliability of classification results is improved. In the present disclosure, the transformation from hard to soft classification is realized, and the seabed habitat inversion of complex mixed sediment in a deep sea is further realized.

IPC Classes  ?

• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection
• G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas

Abstract

A test bench for impact leakage detection of a water hydraulic cylinder based on helium gas detection includes a test bench body, a water hydraulic cylinder, a helium bottle, a sealed container, and an impact device. The water hydraulic cylinder is detachably installed on the test bench body; an outlet end of the helium bottle is in communication with a rodless cavity of the water hydraulic cylinder, and a pressure reducing valve is installed between the helium bottle and the water hydraulic cylinder; the sealed container is detachably installed at a rod cavity of the water hydraulic cylinder, and a helium mass spectrometer leak detector is installed on the sealed container; and the impact device is fixedly installed on the test bench body, and the impact device is connected to a piston rod of the water hydraulic cylinder.

IPC Classes  ?

• G01M 3/22 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables, or tubesInvestigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipe joints or sealsInvestigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for valves
• G01M 3/20 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material

Abstract

A hydraulic system cavitation detection system and a method based on thermocouple module are provided. The hydraulic system cavitation detection system includes a cavitation adjusting device arranged at one side of a hydraulic pipeline to be detected; a first thermocouple module arranged on the cavitation adjusting device; a second thermocouple module arranged on the hydraulic pipeline to be detected; and a detection control center electrically connected with the first thermocouple module and the second thermocouple module respectively. The cavitation detection method is executed by the hydraulic system cavitation detection system.

IPC Classes  ?

• G01N 25/08 - Investigating or analysing materials by the use of thermal means by investigating changes of state or changes of phaseInvestigating or analysing materials by the use of thermal means by investigating sintering of boiling point
• F17D 5/00 - Protection or supervision of installations

Abstract

A device for cavitation monitoring of a hydraulic system includes a branch pipe connected to a hydraulic pipe; a movable unit arranged in the branch pipe and in sliding fit with the branch pipe; and an acquisition unit arranged in the branch pipe and configured to acquire position information of the movable unit. The movable unit is configured such that when a gas filling amount in a medium in the hydraulic pipe changes, the movable unit moves along the branch pipe. The device also includes an information display unit connected to the acquisition unit and configured to analyze and display the position information acquired by the acquisition unit. The device also includes a buffer unit connected to one side of the movable unit close to the hydraulic pipe.

IPC Classes  ?

• G01L 23/26 - Details or accessories
• F17D 5/00 - Protection or supervision of installations

Abstract

A device for cavitation detection of a pure water hydraulic system based on pressure includes a chamber component; an inner diameter of the drainage nozzle gradually increases along an inflow direction of a liquid medium, so as to reduce a flow velocity of the liquid medium after being drained into the drainage nozzle; and the detection assembly includes a housing, one end of the housing facing the drainage nozzle is an open end, an elastic cover sheet is arranged in the open end, an electrode is arranged in the housing, diaphragms are respectively arranged on two sides of the electrode, and the electrode is closely attached to the elastic cover sheet through one of the diaphragms; the liquid medium is ejected from the drainage nozzle and impacts the elastic cover sheet.

IPC Classes  ?

• G01L 23/12 - Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquidIndicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by changing capacitance or inductance
• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
• F15B 21/047 - Preventing foaming, churning or cavitation

Abstract

A pressure-based cavitation detection device and method for a pure water hydraulic system, relating to the technical field of pure water hydraulic systems. The cavitation detection device comprises: a chamber member; a flow-guiding nozzle (4) provided in the chamber member, wherein the flow-guiding nozzle (4) is communicated with the pure water hydraulic system, and the inner diameter of the flow-guiding nozzle (4) gradually increases in the inflow direction of a liquid medium, so that the liquid medium has a reduced flow velocity after being guided into the flow-guiding nozzle (4); and a detection assembly (7) comprising a housing (7.1), wherein the end of the housing (7.1) facing the flow-guiding nozzle (4) is an open end, an elastic cover plate (7.2) is provided in the open end, an electrode (7.5) is provided in the housing (7.1), diaphragms (7.4) are respectively provided on two sides of the electrode (7.5), and the electrode (7.5) fits tightly against the elastic cover plate (7.2) by means of one of the diaphragms (7.4); wherein the liquid medium is sprayed out from the flow-guiding nozzle (4) and then impacts the elastic cover plate (7.2), so that the elastic cover plate (7.2) vibrates, thereby causing the potentials on the two sides of the electrode (7.5) to change, and an output electric signal is input to a terminal. The flow-guiding inclination of the flow-guiding nozzle (4) of the cavitation detection device for the pure water hydraulic system can promote the rupture of cavitation bubbles, so that the detection assembly (7) can more sensitively detect the vibration caused by the rupture of cavitation bubbles, thereby achieving the cavitation detection of the pure water hydraulic system.

IPC Classes  ?

• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
• G01N 9/28 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by measuring pressure differences by measuring the blowing pressure of gas bubbles escaping from nozzles at different depths in a liquid

Abstract

A cavitation monitoring device and method for a hydraulic system. The device comprises: a branch pipe (8) connected to a hydraulic pipe; a movable unit (13) arranged in the branch pipe and in sliding fit with the branch pipe, wherein the movable unit is configured to move along the branch pipe when the gas filling amount in a medium in the hydraulic pipe (6) is changed; an acquiring unit arranged in the branch pipe and configured to acquire position information of the movable unit; an information display unit (4) connected to the acquiring unit and configured to analyze and display the position information acquired by the acquiring unit; and a buffer unit connected to the side of the movable unit close to the hydraulic pipe. According to the device, the branch pipe is connected to the hydraulic pipe and the movable unit is arranged in the branch pipe. When the gas filling amount in the medium in the hydraulic pipe is changed, the movable unit moves and feeds back to the acquiring unit, so that the cavitation phenomenon in the hydraulic system is monitored in real time, and the reliability and stability of the hydraulic system are improved.

IPC Classes  ?

• F17D 5/00 - Protection or supervision of installations

Abstract

A density-based cavitation detection device for a pure water hydraulic system, relating to the technical field of pure water hydraulic systems. The device comprises: a pipe body (1) used for conveying a fluid medium; a detection mechanism (3) arranged on the pipe body (1), a detection end of the detection mechanism (3) being configured to be in intermittent contact with the fluid medium to obtain a cavitation signal of the fluid medium; and a blocking mechanism (4) in sliding fit inside the pipe body (1), the blocking mechanism (4) being configured to enable the pipe body (1) and the detection mechanism (3) to intermittently switch between a blocked state and a connected state. By intermittently performing cavitation detection, the effect of long-time hydraulic shock on the detection device is reduced, and the accuracy of cavitation detection is improved.

IPC Classes  ?

• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere

Abstract

A provincial-scale prediction method of a winter wheat grain protein content includes obtaining crop canopy spectral information of different spatial resolutions and spectral resolutions during a wheat growth period, performing preprocessing on the spectral information, performing feature selection based on pixel-wise phenology matching method, calculating, pixel by pixel, a maximal value of a spectral vegetation index within 90 days of each pixel maturity period, and selecting a vegetation index most highly correlated with the grain protein content for correlation analysis, and constructing a hierarchical linear model to perform prediction on the winter wheat grain protein content. In the present disclosure, the phenological difference of the relationship of remote-sensing information, climatic information and grain protein content is taken into account comprehensively, and pixel-wise phenology matching and hierarchical linear model are introduced, such that with key environmental factors as difference factors of the regional grain protein model.

IPC Classes  ?

• G06T 7/00 - Image analysis

Abstract

A testing apparatus for the whole process of coal borehole deformation and crack development, and an evaluation method, relating to the field of coal borehole deformation testing. The testing apparatus mainly comprises a loading mechanism (1) and a monitoring mechanism (2). The loading mechanism (1) comprises an outer frame (11), a pressure-bearing plate (13), loading cylinders (12), cushion blocks (14), and a coal specimen (15). The monitoring mechanism (2) comprises an industrial camera (21), acoustic emission detectors (22), and an information acquisition unit. The information acquisition unit is used for monitoring and acquiring internal state information of a borehole (151), and can be implemented using a miniature camera (23) or a borehole deformation monitoring sensor (24). The testing apparatus employs the pressure-bearing plate (13) made of high-strength transparent material to implement visual observation of a pressure-bearing surface under three-way stress loading, so that deformation of the borehole (151) and micro-fracture information of nearby coal can be monitored intuitively or by using a monitoring apparatus. For monitoring the state of the borehole (151), either the borehole deformation monitoring sensor (24) or the miniature camera (23) can be selected for use, thereby providing diversified methods for whole-process monitoring, making monitoring information more comprehensive, and achieving whole-process testing of the borehole (151) from deformation to closure.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 3/06 - Special adaptations of indicating or recording means
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

The present invention relates to the field of coal mine concealed fire zone detection, in particular to a coal spontaneous combustion downhole detection system and method based on a self-potential method. The coal spontaneous combustion downhole detection system comprises a self-potential detection apparatus and a self-potential processing apparatus; the self-potential detection apparatus comprises measuring electrodes, a reference electrode and metal anchor rods; the measuring electrodes are arranged on a top plate of a goaf roadway, are fixed to the metal anchor rods, and are in wireless connection with the reference electrode through the metal anchor rods; the self-potential processing apparatus comprises a data processing sensor for processing potential data and an imaging sensor for converting data into images; and the measuring electrodes and the reference electrode are in wireless connection with the data processing sensor.

IPC Classes  ?

• G01V 3/26 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
• E21F 17/18 - Special adaptations of signalling or alarm devices
• G01N 25/50 - Investigating or analysing materials by the use of thermal means by investigating flash-pointInvestigating or analysing materials by the use of thermal means by investigating explosibility
• G01N 33/22 - FuelsExplosives
• G01V 3/34 - Transmitting data to recording or processing apparatusRecording data

Abstract

Disclosed in the present invention are a hydraulic support for solid waste cemented compact backfill mining, and a backfill method. The hydraulic support for backfill mining comprises: a support body portion, a solid backfill aggregate conveying portion, a composite backfill portion and a backfill feedback portion, wherein the composite backfill portion comprises a screw pressing device and a cementing slurry application device, the screw pressing device comprising a sliding base, a screw pressing assembly and a backfill isolation vertical plate, and the cementing slurry application device comprising a cementing slurry conveying line and a backfill area grouting pipe; and the backfill feedback portion comprises an optical fiber stress sensor and a liquid level sensor. By means of the screw pressing device first performing continuous backfill and compressing solid backfill aggregate to improve the degree of backfill compaction of the solid backfill aggregate, and then the cementing slurry application device applying cementing slurry to the backfill body of the solid backfill aggregate which has been primarily compressed and compacted, so as to fill gaps between solid backfill aggregate particles, in order to obtain a stable backfill body with a high degree of compaction, the present invention enables effective control of long-term slow ground deformation while controlling initial deformation of the backfill body.

IPC Classes  ?

• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor

Abstract

The embodiment of the present disclosure provides a method and a device for fine reconstruction of a sedimentation structure of a flume. The device includes: a combined bottom plate and a combined freezing flume, wherein the combined bottom plate is formed by tiling and splicing a plurality of equal-thickness and rectangular basic bottom plates, a splicing gap is located between adjacent basic bottom plates, the splicing gap is filled with elastic adhesive, and the filled splicing gap is as thick as the basic bottom plates; the combined freezing flume includes a plurality of local freezing flumes; and each of the basic bottom plates has a local freezing flume that matches the basic bottom plate.

IPC Classes  ?

• G01V 5/12 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma- or X-ray sources

Abstract

A method of intelligent prediction of coal stress and different diameters pressure relief based on optimization neural network collects the drilling parameters while drilling the pressure-relief boreholes at one working face and to obtain the stress values using the accompanying boreholes of the pressure-relief boreholes to construct the prediction model; in this way, the prediction model is applied to predict the value of mining stress when drilling pressure-relief borehole in other working faces; according to the prediction results, the distribution law of mining stress is analyzed, and then the reaming position, length of reaming section and hole diameter of the pressure relief borehole are determined; the present invention monitors the pressure-relief borehole construction process of accompanying borehole parameters at the same time, monitoring the adjacent accompanying borehole corresponding to the depth of the drilling borehole coal stress value.

IPC Classes  ?

• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
• G01V 20/00 - Geomodelling in general

Abstract

The present disclosure provides a method for preparing a catalyst for pyrolysis of waste plastics to produce oil, comprising: washing and modifying coal gangue powder with acid, and then placing in an alkaline solution, etching under magnetic stirring for 20-30 minutes, and washing with water until neutral; placing the catalyst washed until neutral in a metal solution, loading the metal by impregnation, and then filtering and washing; then placing the catalyst in the molding machine and adding adhesive and water, to compress into a suitable shape, drying, and finally calcinating to activate to obtain a product. The present disclosure not only solves the problem of waste plastic pollution, but also obtains fuel oil with high valuable products while reducing the cost of waste plastic treatment, and also improves the yield of fuel oil.

IPC Classes  ?

• B01J 37/02 - Impregnation, coating or precipitation
• B01J 21/18 - Carbon
• B01J 23/06 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of zinc, cadmium or mercury
• B01J 23/28 - Molybdenum
• B01J 23/34 - Manganese
• B01J 23/75 - Cobalt
• B01J 23/755 - Nickel
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
• B01J 37/06 - Washing
• B01J 37/08 - Heat treatment
• B01J 37/34 - Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves
• C10B 53/07 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of synthetic polymeric materials, e.g. tyres
• C10B 57/12 - Applying additives during coking
• C10G 1/10 - Production of liquid hydrocarbon mixtures from oil shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste

Abstract

An assessment and control method, system and device for time-energy efficiency of CNC machine tools. The method comprises: comprehensively analyzing the influence of factors of the startup rate and extra startup frequency of a CNC machine tool on the energy efficiency of the CNC machine tool, and constructing a mathematical model of the time-energy efficiency of the CNC machine tool and the startup rate and extra startup frequency of the CNC machine tool. The time-energy efficiency of the CNC machine tool is monitored to realize the overlimit warning function for the time-energy efficiency of the CNC machine tool to finally control the time-energy efficiency of the CNC machine tool within a target range. The present invention analyzes the influence of the downtime loss of the CNC machine tool on the energy efficiency of the CNC machine tool, and can realize overlimit warning for time-energy efficiency of the CNC machine tool.

IPC Classes  ?

• G05B 19/4155 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by programme execution, i.e. part programme or machine function execution, e.g. selection of a programme

Abstract

An automatic support device for resisting rock burst in mines is provided, which includes bases symmetrically distributed, sliding frames are slidably connected to the bases, hydraulic rods are fixedly connected to the bases, and telescopic ends of the hydraulic rods are fixedly connected to the adjacent sliding frames. The sliding frames are fixedly connected to brackets, and the brackets symmetrically distributed are provided with a main support plate, on which pushing rods are provided. The device can slow down the impact force of the device when rock burst occurs in the mine, at the same time, it plays a supporting role in the mine, ensuring the stability of the roof of the mine.

IPC Classes  ?

• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor
• E21D 15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props

Abstract

Disclosed is a microscopic comparison and experimental verification method for the wettability of similar surfactants on coal dust, comprising: collecting a coal sample on site from a mining area and analyzing the coal sample by infrared spectroscopy and nuclear magnetic resonance spectroscopy to obtain information on functional groups and carbon structure of coal molecules; S2: constructing a surfactant-coal molecule electrostatic interaction model and analyzing an orbital energy difference and an electrostatic potential difference between surfactant molecules and coal molecules, etc. S6. The invention provides a simple and effective idea for the selection of surfactants.

IPC Classes  ?

• G16C 20/30 - Prediction of properties of chemical compounds, compositions or mixtures
• G01N 21/3563 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solidsPreparation of samples therefor
• G01N 24/08 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
• G16C 20/20 - Identification of molecular entities, parts thereof or of chemical compositions

Abstract

A microscopic comparison and experimental verification method for the wettability of similar surfactants to coal dust, comprising the following steps: S1, collecting an on-site coal sample from a mining area, crushing into powder, and then performing infrared spectrographic analysis and nuclear magnetic resonance spectrographic analysis to obtain information of functional groups and carbon structures of coal molecules; S2, constructing a surfactant-coal electrostatic interaction model, and analyzing an orbital energy difference and an electrostatic potential difference between surfactant molecules and the coal molecules; S3, analyzing the strength and energy of hydrogen bonds between surfactants and water molecules, wherein the strength is determined by bond angles and bond lengths of the hydrogen bonds; S4, constructing a surfactant-coal-water molecule periodic solution model, and performing geometric optimization on the surfactant-coal-water molecule periodic solution model, so that the surfactant-coal-water molecule periodic solution model reaches a stable configuration; S5, performing NPT simulation and NVT simulation on the periodic solution model; and S6, performing experimental verification, so that the problems of long experimental time and high cost and the like of current selection of surfactants can be effectively solved, and a simple and effective thought is provided for the selection of surfactants.

IPC Classes  ?

• G16C 60/00 - Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation
• G16C 10/00 - Computational theoretical chemistry, i.e. ICT specially adapted for theoretical aspects of quantum chemistry, molecular mechanics, molecular dynamics or the like
• G06T 17/00 - 3D modelling for computer graphics
• G06F 30/10 - Geometric CAD
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

A remote-sensing yield estimation method is described that is applicable to a crop whole growth period and belongs to the field of data processing methods and photogrammetry technologies with prediction purpose. In the present disclosure, in combination with agricultural knowledge of crop yields and multi-source remote-sensing data, with the biomass estimation model of whole growth period, the biomass contribution rate curve and the crop harvest index as basis, a crop yield estimation model of whole growth period with stable spatiotemporal extensibility is constructed. The yield estimation model uses the relative accumulated temperature and the remote-sensing vegetation index as variable inputs. Further, based on genetic algorithm, the parameters of the model are optimized in a case of failing to directly construct the model with data fitting due to less sample points, so as to help solve the problems of poor spatiotemporal mobility of the yield estimation model.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G06N 3/126 - Evolutionary algorithms, e.g. genetic algorithms or genetic programming
• G06Q 50/02 - AgricultureFishingForestryMining

Abstract

A multifunctional teaching demonstration device for economic management is provided. It includes a folding device the back of the folding device is provided with multiple folding components, the front of the folding device is provided with a display, the front of the display is flexibly connected to a transparent board, the left side of the display is flexibly connected to the first demonstration module, the right side of the display is flexibly connected to the second demonstration module, there are two first teaching aid cabinets under the first demonstration module and the second demonstration module, the bottom of the first teaching aid cabinets is flexibly connected to the second teaching aid cabinet.

IPC Classes  ?

• G09B 19/18 - Book-keeping or economics

Abstract

A mine cooling and dehumidifying system includes a compressor, a gas-liquid separator, an evaporator, a condenser and an expansion valve. The evaporator is in an air supply well, and the condenser is in a return air well; the compressor, the gas-liquid separator and the expansion valve are all between the air supply well and the return air well; an inlet of the compressor is connected to a refrigerant outlet of the evaporator through the gas-liquid separator, and a refrigerant inlet of the evaporator is connected with an outlet of the expansion valve; an inlet of the expansion valve is connected with a refrigerant outlet of the condenser, and a refrigerant inlet of the condenser is connected with an outlet of the compressor. In the present disclosure, by vapor compression type refrigeration cycle, the downhole air heat is transferred to the return air and then discharged to the ground.

IPC Classes  ?

• E21F 3/00 - Cooling or drying of air
• E21F 1/00 - Ventilation of mines or tunnelsDistribution of ventilating currents

Abstract

Disclosed are a capillary force-based horizontal dual-layer semiconductor field effect transistor and a preparation method. The transistor comprises a substrate (1), a dielectric layer (2), a semiconductor layer (3) and a metal electrode (4), in sequence from bottom to top, the semiconductor layer (3) being a semiconductor having a horizontal dual-layer structure. The preparation method comprises: preparing a multi-channel mold having multiple first micro-channels (5) and second micro-channels (6), the left end of each first micro-channel (5) being an open end and the right end thereof being a closed end, the left end of each second micro-channel (6) being a closed end and the right end thereof being an open end, and the first micro-channels (5) and the second micro-channels (6) being disposed at intervals; and dripping a N-type semiconductor solution (7) and a P-type semiconductor solution (8) on the left side and the right side of the mold, respectively. A dual-layer semiconductor having a horizontal structure can be prepared under the action of capillary force without requiring an additional mask plate.

IPC Classes  ?

• H01L 21/331 - Transistors
• H01L 29/739 - Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field effect

Abstract

A multi-stage driven escalator with a self-healing function and an adaptive synchronous control method therefor. The multi-stage driven escalator with a self-healing function comprises: single-stage driving electric motor sets provided on two ends of the escalator, a multi-stage driving electric motor set provided between the single-stage driving electric motor sets, and a main controller (4), wherein the single-stage driving electric motor sets and the multi-stage driving electric motor set are configured for driving the escalator to move, and are further configured for collecting operation data and transmitting the operation data to the main controller (4), the operation data comprising rotational speed data and current data; and the main controller (4) is connected to the single-stage driving electric motor sets and the multi-stage driving electric motor set, and is configured for receiving the operation data and issuing a control instruction on the basis of the operation data, the control instruction being configured to control the single-stage driving electric motor sets and the multi-stage driving electric motor set to operate. The multi-stage driven escalator with a self-healing function effectively reduces the total pulling force borne by a transmission device, and when a certain driving electric motor fails, the operation power of the other driving electric motors can be automatically regulated, so as to implement fault self-healing, thereby ensuring the reliability and stability of a working process.

IPC Classes  ?

• B66B 25/00 - Control of escalators or moving walkways
• B66B 23/02 - Driving gear

Abstract

The present invention relates to the technical field of mine roadway utilization. Provided is an arrangement method for roadway junctions for compressed air energy storage in abandoned mine roadway space. The method comprises: using a geophysical prospecting method to perform preliminary prospecting on a roadway junction to determine the stress and deformation states of roadway surrounding rock at the roadway junction, so as to determine the range of elastic-plastic areas; dividing the roadway junction into a plurality of areas; digging equilateral triangle-shaped recesses in the two sides of the roadways; using grouting and grouting anchor cables to reinforce the roadway surrounding rock; providing air pipes in the middle portions of the roadways, and simultaneously providing three-way valves in roadway intersection areas, and wrapping the outer side of each air pipe with a protection layer; and, according to area division, performing filling and sealing. The method uses area-based grouting reinforcement treatment to effectively reduce the treatment difficulty and improve the bearing capacity of roadways, and uses communication pipes to connect a plurality of roadways so as to ensure smooth air circulation. In addition, roadway junctions configured by using the method have better sealing tightness and stability, thereby providing convenience for compressed air energy storage.

IPC Classes  ?

• E21F 17/16 - Modification of mine passages or chambers for storage purposes, especially for liquids or gases

Abstract

An in-situ testing apparatus and testing method for rockbolt support response characteristics under dynamic and static loading. The apparatus comprises a static load jack (1), a dynamic load jack (2), nitrogen springs (3), a pressure-bearing plate (4), a safety ring (5), a pressurizing device (6), and a remote control device (7), wherein the static load jack (1) and the dynamic load jack (2) are coaxially arranged by means of a connecting rod (8); the safety ring (5) is arranged on the side surface of the static load jack (1); the dynamic load jack (2) has an annular jack structure; the pressure-bearing plate (4) is connected to a loading end of the dynamic load jack (2); a through hole is provided in the middle of the pressure-bearing plate (4); a plurality of nitrogen springs (3) are disposed on one side of the pressure-bearing plate (4); and the pressurizing device (6) comprises an energy storage cavity (14), a plunger pump (15), and a pneumatic power device. By means of the apparatus, static load pullout characteristic testing of the support of a rockbolt (28) at an engineering site can be implemented, and the dynamic load disturbance response characteristics of the rockbolt (28) in different operating states can also be measured, thereby achieving comprehensive testing under superposition of static load and dynamic load disturbances with respect to the actual support performance of the rockbolt (28) on site.

IPC Classes  ?

• G01N 3/36 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means

Abstract

A thermal management system of a ship composite energy power system and a control method thereof are provided, including a thermal management circuit, which includes a seawater heat exchange circuit, an internal combustion engine thermal management circuit, a hydrogen fuel cell thermal management circuit, and a power battery and accessories thermal management circuit. It provides a thermal management control strategy for composite energy of internal combustion engine, fuel cell, and power battery; the various circuits can be independently adjusted; the heat dissipation effect is obvious, and the temperature of each cooling circuit can be better controlled; the energy utilization rate can be improved; the heat can be transferred to the other subsystems, and the heat dissipation area can be enlarged; and the fuel cell circuit can be elevated to the temperature by the heat exchanger and the electric heater, and it can reach the target working temperature more quickly.

IPC Classes  ?

• H01M 10/615 - Heating or keeping warm
• F01P 3/20 - Cooling circuits not specific to a single part of engine or machine
• F01P 5/10 - Pumping liquid coolantArrangements of coolant pumps
• F01P 7/14 - Controlling of coolant flow the coolant being liquid
• F02D 41/06 - Introducing corrections for particular operating conditions for engine starting or warming up
• H01M 8/04007 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
• H01M 8/04029 - Heat exchange using liquids
• H01M 8/04225 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-downDepolarisation or activation, e.g. purgingMeans for short-circuiting defective fuel cells during start-up
• H01M 8/04302 - Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during start-up
• H01M 8/0432 - TemperatureAmbient temperature
• H01M 8/04746 - PressureFlow
• H01M 10/625 - Vehicles
• H01M 10/6568 - Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
• H01M 10/6571 - Resistive heaters
• H01M 16/00 - Structural combinations of different types of electrochemical generators

Abstract

The present disclosure provides a method of perceiving a position and pose of a hydraulic support group based on multi-point ranging and belongs to the field of test or measurement technologies unlisted in other categories. The method uses a hydraulic support group. The hydraulic support group includes multiple juxtaposed hydraulic supports. The method includes: with a plane above a base as a reference plane, establishing a reference coordinate system; perceiving a relative position of the base and a canopy of the hydraulic supports and perceiving a position and pose of a single hydraulic support; when the hydraulic supports have axial offset and roll phenomenon, performing offset amount calculation; based on the perception of the position and pose of single hydraulic supports, performing perception on the position and pose of the hydraulic support group. In the present disclosure, the measurement devices achieve conversion of pure distance information into three-dimensional pose information of an object in time and space by using logical combination of several real-time ranging terminals, leading to simple structure; there is no interference between measurement devices, and there is wireless connection between a signal transmitting device and a signal receiving device, resulting in no rendezvous point and being free from impact of frictional force.

IPC Classes  ?

• G01S 11/02 - Systems for determining distance or velocity not using reflection or reradiation using radio waves
• F15B 15/28 - Means for indicating the position, e.g. end of stroke
• G01B 21/04 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
• G01F 17/00 - Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using radio waves
• G01B 11/27 - Measuring arrangements characterised by the use of optical techniques for measuring angles or tapersMeasuring arrangements characterised by the use of optical techniques for testing the alignment of axes for testing the alignment of axes
• G01B 15/00 - Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons

Abstract

A method of analyzing influencing factors of a contribution rate of elastic energy of a top plate during catastrophe of a coal body; the specific steps are: taking a core on site and processing the core into a standard test piece; obtaining, by means of an indoor mechanical test, elastic moduli of the top plate and of gas-containing coal, respectively; substituting the obtained elastic moduli and thicknesses of the top plate and of the gas-containing coal into a calculation formula so as to obtain the contribution rate of the elastic energy of the top plate; and analyzing the influence of the contribution rate of the elastic energy of the top plate in the two situations of configuring the same thickness ratio and a different elastic modulus ratio and the same elastic modulus ratio and a different thickness ratio. The method has important theoretical significance and practical engineering value.

IPC Classes  ?

• G01N 33/22 - FuelsExplosives
• G01N 3/00 - Investigating strength properties of solid materials by application of mechanical stress
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

Disclosed in the present invention is a method for determining a drilling powder rate index of a large-diameter destressing drillhole on a coal seam. By means of a coal-body drilling-destressing synchronization test, by using obtained drilling powder-stress curves for a 42 mm standard hole and a large-diameter destressing drillhole, and in view of a drilling powder rate index of the 42 mm standard hole, a drilling powder rate index of the large-diameter destressing drillhole is determined. The present invention takes into consideration the influences of the diameter and a destressing effect of a drillhole, such that critical drilling powder of the large-diameter destressing drillhole that is obtained by using the drilling powder rate index reflects a coal-body burst early-warning critical stress after drillhole destressing, and when drilling-method monitoring is performed by using the large-diameter destressing drillhole, the result is more accurate. The present invention is not only suitable for determining a drilling powder rate index of a drillhole which has a destressing effect and a diameter of 100-200 mm or even larger, but is also suitable for determining drilling powder rate indexes of drillholes which have other diameters and have no destressing disturbance. The present invention performs an indoor test by using a coal body on a test working face, and takes into comprehensive consideration the influences of factors such as the strength of coal bodies of different coal mines on a drilling powder rate index, and therefore further conforms to actual site situations of a coal mine.

IPC Classes  ?

• G01N 5/00 - Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
• G01N 33/22 - FuelsExplosives

Abstract

Disclosed in the present invention are a system and method for monitoring a roof overburden and a coal pillar of a gob-side entry. The system comprises a top monitoring station, a coal pillar comprehensive monitoring station, a roof stress monitoring station and an upper computer. A top monitoring station is arranged in a crossheading to monitor a working face; a coal pillar comprehensive monitoring station is arranged at a horizontal roadway on a working face of a lower coal seam to monitor a coal pillar; and a roof stress monitoring station is arranged at a main roadway in a mining area to monitor the coal pillar. Each monitoring station is controlled by means of an upper computer to perform continuous monitoring, such that during tunneling or stoping of two adjacent working faces, the stress and deformation distributions of the coal pillar and a movement damage process of an overburden structure in a goaf can be continuously monitored. By means of the invention, various monitoring stations are arranged in a crossheading of an upper coal seam and an entry at a working face of a lower coal seam, thereby ensuring, to the greatest possible extent, that after the working face is stoped to form a goaf, all overburden movement monitoring stations are still in a working state, and do not fail due to the formation of the goaf. The drilling construction used in the present invention is performed in an entry, such that the monitoring safety risk can be reduced, and data support is provided for the stability analysis of a coal pillar and the movement calculation of a roof overburden.

IPC Classes  ?

• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

The present invention relates to the technical field of mine support, and in particular to an anti-rock-burst automatic support device for mines. The anti-rock-burst automatic support device for mines comprises symmetrically distributed bases, wherein slide brackets are slidably connected to the bases; hydraulic rods are fixedly connected to each base, and telescopic ends of the hydraulic rods are fixedly connected to an adjacent slide bracket; brackets are fixedly connected to the slide brackets; a main support plate is provided on the symmetrically distributed brackets; first push rods symmetrically distributed at equal intervals and third push rods symmetrically distributed at equal intervals are provided on the main support plate; and symmetrically distributed second push rods and symmetrically distributed fourth push rods are fixedly connected to the main support plate, and the second push rods and the fourth push rods are slidably connected to piston plates, respectively. In the present invention, by means of compressing springs between the piston plates and the fourth push rods, the impact force on the device when a rock burst occurs in a mine is reduced, and the device supports the mine, thereby ensuring the stability of the top of the mine.

IPC Classes  ?

• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor

Abstract

A long-endurance self-powered ocean buoy includes a buoy body, a power generation device and a gas bag base; the power generation device is mounted at a lower end of the gas bag base and includes a housing, a first power generation assembly, a second power generation assembly and a storage battery; the first power generation assembly includes a plurality of mutually-communicated gas chambers, hydraulic bags and control integration units. The lowest gas chamber is filled with a volatile working medium which can generate gas pressure by volatilization to drive power generation fans in turbines on a vent pipe communicating adjacent gas chambers for power generation. The second power generation assembly includes a plurality of temperature difference energy modules with one end surrounded by a phase change material and the other end in contact with the housing, so as to increase the power generation efficiency.

IPC Classes  ?

• F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
• B63B 22/24 - Buoys container type, i.e. having provision for the storage of material
• F03G 7/05 - Ocean thermal energy conversion, i.e. OTEC
• H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines

Abstract

Disclosed in the present invention is a multi-stage yielding and anti-impact device suitable for anchoring support, comprising an anti-impact component, a second-stage yielding component, and a first-stage yielding component. The first-stage yielding component and the second-stage yielding component each comprise an outer sleeve, an inner extrusion sleeve, and a diameter expanding stage arranged at the bottom end of the inner extrusion sleeve; a buffer energy-absorbing material filler body is arranged between the outer sleeve and the inner extrusion sleeve; the outer diameter of the outer sleeve in the first-stage yielding component is kept consistent with the large-diameter end of the diameter expanding stage in the second-stage yielding component, and the outer sleeve in the first-stage yielding component abuts against the bottom of the diameter expanding stage in the second-stage yielding component. According to the present invention, multi-stage yielding of an anchor rod/anchor cable under high working resistance is achieved, broken failure during impact dynamic load disturbance superposition is also avoided, the dual functions of multi-stage yielding and anti-impact are achieved, and effective control over deformation and breakage of tunnel surrounding rock is ensured.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

3333, so as to achieve the aims of reducing exhaust emissions of the underground coal mine diesel vehicle and improve exhaust purification efficiency.

IPC Classes  ?

• F01N 3/021 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters

Abstract

A multi-stage pressure yielding and anti-impact device for anchoring support is proposed, which includes an anti-impact component, a secondary pressure yielding component, and a primary pressure yielding component. The primary pressure yielding component and the secondary pressure yielding component each include an outer sleeve, an inner extrusion sleeve, and an expansion platform, and the expansion platform is arranged at a bottom end of the inner extrusion sleeve. A buffering and energy-absorbing material filling body is arranged between the outer sleeve and the inner extrusion sleeve. An outside diameter of the outer sleeve in the primary pressure yielding component is equal to that of a large-diameter end of the expansion platform in the secondary pressure yielding component, and the outer sleeve in the primary pressure yielding component is pressed against a bottom of the expansion platform in the secondary pressure yielding component.

IPC Classes  ?

• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

A test system for an anchoring performance of a full-size rock mass anchor bolt under combined load and relates to the technical field of detection test equipment includes a primary frame, a co-directional pull-twist loading mechanism and a vertical shear loading mechanism. The primary frame includes a dual-parallel horizontal reaction frame and a vertical reaction frame. The co-directional pull-twist loading mechanism and the vertical shear loading mechanism are arranged in synergy with the primary frame. The co-directional pull-twist loading mechanism performs synchronous pull and twist loading for the anchored rock mass and the vertical shear loading mechanism applies a static load or simulates a dynamic load disturbance. The co-directional pull-twist loading mechanism and the vertical shear loading mechanism perform separate loading.

IPC Classes  ?

• G01N 3/24 - Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
• G01N 3/22 - Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces

Abstract

A ship hydrogen hybrid power propulsion system and a method thereof are provided. The ship hydrogen hybrid power propulsion system includes a motor, a propeller, a power battery, an external motor controller, an internal motor controller, a hydrogen fuel cell, a hydrogen internal combustion engine, and a hydrogen storage tank. It combine the hydrogen fuel cell with the hydrogen internal combustion engine, and the hydrogen fuel cell is combined with the power battery and dynamically coupled with the internal motor and the external motor. Only a single hydrogen energy is needed, which is conducive to the layout and integration of the power system and achieves zero carbon emissions. Compared to the current dual motor power system, it has high integration, simpler power coupling, and a wider range of power output, making it particularly suitable for the high load and high-power output requirements of heavy-duty ships.

IPC Classes  ?

• B63H 21/20 - Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
• B63B 17/00 - Vessels parts, details, or accessories, not otherwise provided for
• B63H 21/14 - Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
• B63H 21/17 - Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
• B63H 21/21 - Control means for engine or transmission, specially adapted for use on marine vessels
• B63H 23/30 - Transmitting power from propulsion power plant to propulsive elements characterised by use of clutches
• B63H 23/34 - Propeller shaftsPaddle-wheel shaftsAttachment of propellers on shafts
• F01N 3/02 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
• F02M 31/20 - Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
• H01M 8/04014 - Heat exchange using gaseous fluidsHeat exchange by combustion of reactants
• H01M 8/04082 - Arrangements for control of reactant parameters, e.g. pressure or concentration
• H01M 8/04111 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
• H01M 8/04119 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyteHumidifying or dehumidifying
• H01M 8/0662 - Treatment of gaseous reactants or gaseous residues, e.g. cleaning
• H01M 10/44 - Methods for charging or discharging
• H01M 16/00 - Structural combinations of different types of electrochemical generators
• H02K 11/33 - Drive circuits, e.g. power electronics

Abstract

The present disclosure relates to the technical field of medical supplies, in particular to a fusion cage. The fusion cage comprises a main body, which is a flat-shaped porous structural body and composed of a plurality of structural units. The fusion cage provided by the present disclosure is the flat-shaped porous structural body composed of the plurality of structural units, the porosity of the whole structure of the fusion cage is controlled by using the parametrization design, so the elastic modulus of a fusion body is effectively reduced, and then each structural unit comprises the basal body and the plurality of extension portions extending from the surface of the basal body, the surfaces of the basal body and/or the extension portions are composed of the plurality of curved surfaces through smooth connection, and such design effectively reduces the problem of stress concentration, and improving the postoperative recovery effect of patients.

IPC Classes  ?

• A61F 2/44 - Joints for the spine, e.g. vertebrae, spinal discs

Abstract

A swirl structure-based exhaust aftertreatment device for an underground mining diesel vehicle comprises a water tank, a PM collection tank, an inlet tube, a high-speed rotary exhaust separator, an exhaust catalytic converter, a circulating NOx selective catalytic reduction system and an exhaust tube. The high-speed rotary exhaust separator comprises a Laval tube, a throat tube, a swirl tube and a first deposition tube. The concentration of toxic and harmful components in exhaust can be decreased below a concentration threshold, thus avoiding pipeline blockage caused by PM accumulation.

IPC Classes  ?

• F01N 3/28 - Construction of catalytic reactors
• F01N 3/033 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
• F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
• F01N 3/037 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of inertial or centrifugal separators, e.g. associated with agglomerators
• F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
• F01N 13/00 - Exhaust or silencing apparatus characterised by constructional features

Abstract

A thermal power plant temperature variable alarm prediction method and system based on an amplitude change trend. The method comprises: acquiring historical data and current data of a temperature variable of each measurement point of a thermal power plant device; on the basis of the historical data and the current data of the temperature variable of each measurement point, predicting a probability that the temperature variable of each measurement point leads to an alarm state, a non-alarm state, or an unknown state in the future; and according to the probability that the temperature variable of each measurement point leads to the alarm state, the non-alarm state, or the unknown state in the future, obtaining a prediction probability that a data section of an amplitude rising trend of the current data of the temperature variable of each measurement point triggers the alarm state, and a confidence interval of the prediction probability, and updating and displaying in real time in an image user interface. The present invention has important significances in improving the application effect of an alarm system in industrial production, reducing economic losses caused by production anomalies, and avoiding serious production accidents.

IPC Classes  ?

• G08B 31/00 - Predictive alarm systems characterised by extrapolation or other computation using updated historic data

Abstract

Disclosed are an underground engineering rock mass shear simulation test device, a test method and a test machine. The test method includes: setting different test conditions by a controller to perform cyclic shear test at high temperature, fracture shear seepage test, granite uniaxial compression test at high temperature and granite fracture shear test under constant normal stiffness boundary conditions at room temperature. The electric heating wire assembly, the fan assembly and the environmental box are combined to flexibly and uniformly heat the samples placed in the upper shear box and the lower shear box. In terms of shear-seepage test, this scheme proposes a second sample placing mechanism that realizes sealing through sealing capsule and sealing capsule pressing plate. It realizes stable sealing and facilitates monitoring and debugging of seepage parameters.

IPC Classes  ?

• G01N 3/24 - Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
• G01N 1/44 - Sample treatment involving radiation, e.g. heat
• G01N 33/24 - Earth materials

Abstract

The present disclosure discloses a method for estimating a contribution rate of elastic energy of a top plate during instability catastrophe of a deep gas-containing coal body, which specifically includes the following steps: acquiring gas pressure of a coal seam; acquiring a thickness of the coal seam and the top plate according to a borehole histogram; coring in the field, processing and pre-processing coal samples, and acquiring an elastic modulus of the top plate, gas-containing coal and standard specimens of a gas-containing coal-rock combination through indoor mechanical tests, respectively; deducing contribution of the elastic energy of the top plate with the help of a graphic area for a stress-strain curve, and obtaining a quantitative expression of the contribution rate of the elastic energy of the top plate based on the elastic modulus and the thickness of the top plate and the gas-containing coal. According to the present disclosure, the function of the elastic energy of the top plate in coal-rock gas dynamic disasters is taken into full account, and a calculation method and a specific quantitative calculation formula are given, so that the function of the elastic energy of the top plate in disasters can be more clearly understood, and beneficial reference is provided for accurate prevention and control of coal-rock gas dynamic disasters in mines.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/06 - Special adaptations of indicating or recording means
• G01N 33/24 - Earth materials

Abstract

The disclosure provides a rock stratum grouting water blocking test device and method under a mining coupling condition, and relates to the technical field of permeability testing. The device includes a solution box, a test box, a pressing plate replacement box, a grouting pump, a recovery pool and a water pump, the solution box is connected with the test box through a liquid injection pipe, the bottom of the test box is connected with the pressing plate replacement box, the pressing plate replacement box is connected with a bottom plate, and the bottom plate is connected with a control panel. The device can be used for testing the influence of the single-factor or multi-factor coupling action of temperature, water quality, water pressure, water flow and grouting pressure on the grouting effect.

IPC Classes  ?

• G01N 3/56 - Investigating resistance to wear or abrasion

Abstract

A volume liquid fixed-ratio multi-batch mixing valve includes a valve body, including a first inlet liquid chamber, a second inlet liquid chamber and a mixing chamber; a first valve core, controlling liquid inflow into the first inlet liquid chamber; a second valve core, controlling liquid inflow into the second inlet liquid chamber; a liquid drainage valve core, controlling liquid drainage; a rotary shaft includes a first impeller and a second impeller. The first impeller and the second impeller alternately control flow to the first inlet liquid chamber and the second inlet liquid chamber and to the second inlet liquid chamber and the mixing chamber. The first impeller and the second impeller are symmetrically about the rotary shaft; when the first inlet liquid chamber and the second inlet liquid chamber are communicated, the second valve core closes the second inlet liquid chamber and the mixing chamber.

IPC Classes  ?

• F16K 11/22 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
• F16K 31/04 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a motor
• F16K 31/53 - Mechanical actuating means with toothed gearing

Abstract

A subsonic compressor, a rotor blade and a method for flow stability enhancement are provided. The subsonic compressor includes a hub and a casing, a tip clearance is formed between a tip of the rotor blade and an inner wall of the casing. The tip clearance is formed as a circumferential diverging leakage passage expanding from a pressure surface side of the rotor blade of the subsonic compressor at the tip to a suction surface side of the rotor blade at the tip.

IPC Classes  ?

• F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
• F04D 17/10 - Centrifugal pumps for compressing or evacuating

Abstract

The present disclosure relates to an efficient biodegradable dust suppressant for an open-pit mine and a preparation method therefor. The dust suppressant includes the following components in percentage by weight: 2%-3.5% of gallic acid, 1.5%-2% of sodium alginate, 0.25%-2% of a surfactant, 0.5%-1% of an antifreeze liquid, and balance water. The preparation method includes the following steps: (1) preparing the gallic acid; (2) preparing the antifreeze liquid; (3) weighing the components in parts by weight; (4) mixing the gallic acid, water, sodium alginate and antifreeze liquid; (5) adding the surfactant; and (6) adding the balance water to prepare the efficient biodegradable dust suppressant for an open-pit mine. The present disclosure has the characteristics of low temperature resistance, high temperature resistance, bonding, wetting, coal dust consolidation and the like, is biodegradable, and does not cause secondary pollution. Meanwhile, the present disclosure causes no harm to human body and the environment.

IPC Classes  ?

• C09K 3/22 - Materials not provided for elsewhere for dust-laying or dust-absorbing

Abstract

Provided is a method and system for predicting a height of a confined water rising zone. The method includes: obtaining sample data; dividing the sample data into a training sample and a test sample; calculating a degree of correlation between a height and a correlation factor value sequence; screening correlation factors according to the degree of correlation to obtain screened correlation factors; calculating weights of the screened correlation factors using an entropy weight method (EWM); obtaining standardized screened correlation factor value sequences according to correlation factor value sequences corresponding to the screened correlation factors; calculating a value of each indicator according to the standardized screened correlation factor value sequences and the weights; and obtaining a height prediction model of a confined water rising zone based on principal component analysis (PCA)-particle swarm optimization (PSO)-support vector regression (SVR), the value of each indicator, and the test sample.

IPC Classes  ?

• G06N 3/006 - Artificial life, i.e. computing arrangements simulating life based on simulated virtual individual or collective life forms, e.g. social simulations or particle swarm optimisation [PSO]
• G06F 18/2135 - Feature extraction, e.g. by transforming the feature spaceSummarisationMappings, e.g. subspace methods based on approximation criteria, e.g. principal component analysis
• G06F 18/2337 - Non-hierarchical techniques using fuzzy logic, i.e. fuzzy clustering
• G06F 18/2411 - Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches based on the proximity to a decision surface, e.g. support vector machines
• G06F 18/27 - Regression, e.g. linear or logistic regression

Abstract

A drilling device for coal mining is provided, including a placement board. The placement board is fixedly connected to a first support pillar and a second support pillar, and the first support pillar and the second support pillar are together fixedly connected to a transmission rod; the transmission rod is connected to support rods symmetrically distributed in a limited sliding manner, and the support rods symmetrically distributed are connected to a connecting rod in a sliding manner; the connecting rod is provided with grooves evenly distributed in a circumferential direction, the grooves are fixedly connected to pneumatic telescopic blocks, and the telescopic end of each pneumatic telescopic block is fixedly connected to an arc-shaped plate. The arc-shaped plate is extended in a circumferential direction to support the drilled hole close to the drill bit, preventing the collapse of the drilling wall close to the drill bit.

IPC Classes  ?

• E21B 7/00 - Special methods or apparatus for drilling
• E21B 3/02 - Surface drives for rotary drilling
• E21B 19/081 - Screw-and-nut feed mechanisms
• E21B 21/01 - Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
• E21C 37/00 - Other methods or devices for dislodging with or without loading
• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal

Abstract

The present disclosure relates to the field of GNSS and INS integrated navigation technology, and specifically discloses a GNSS and INS integrated navigation positioning method and a system thereof. To addresses the technical problem of positioning error divergence in integrated navigation systems caused by insufficient satellite visibility or strong multipath effects in GNSS denial environments, a method combining motion constraint algorithm and neural network algorithm is proposed for robustness by the present disclosure. The motion constraint algorithm is very stable, but it cannot self-adaptively adjust the constraint threshold based on the vehicle motion state. The neural network algorithm has strong flexibility, but the obtained predicted values inevitably have outliers. The present disclosure combines motion constraints with the neural network algorithms, enabling these two algorithms to complement advantages of each other, thereby effectively improving the positioning accuracy and reliability of the integrated navigation system after GNSS losing lock.

IPC Classes  ?

• G01S 19/39 - Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
• G01S 19/40 - Correcting position, velocity or attitude
• G01S 19/49 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system whereby the further system is an inertial position system, e.g. loosely-coupled
• G01S 19/52 - Determining velocity

Abstract

A method and system for predicting water flooding recovery of fault block reservoirs considering a whole process optimization includes: determining influencing factors in water flooding recovery of fault block reservoirs; screening master parameters of the water flooding recovery of the fault block reservoirs; determining a single-factor correlation between the water flooding recovery of the fault block reservoirs and the master parameters; designing multi-factor orthogonal experimental schemes; performing a whole-process water flooding optimization for each of the experimental schemes including separate-layer injection and production, well-type conversion, and injection and production adjustment, to obtain the maximum water flooding recovery; and determining a prediction model of the water flooding recovery of the fault block reservoirs using least square method based on results of the whole process optimization of orthogonal experiments, further obtaining a prediction model of the water flooding recovery of the fault block reservoirs.

IPC Classes  ?

• E21B 43/20 - Displacing by water
• G06F 30/20 - Design optimisation, verification or simulation
• G06F 111/10 - Numerical modelling

Abstract

The present invention relates to the technical field of information detection and intelligent supervision, and provides an operation and maintenance management and control integrated system for an urban elevator. An intelligent single elevator monitoring system in the present invention is used for collecting operation parameters of parts of an in-service elevator, integrating maintenance personnel monitoring information and sensor monitoring information, and implementing accurate judgment of a fault in a single elevator by means of a cloud assessment model, and an urban GPRS data transmission system transmits online single elevator monitoring data to an urban operation and maintenance management and control big data platform; and a remote monitoring communication service system enhances maintenance and management of the transmitted data and ensures signal quality; the urban operation and maintenance management and control big data platform integrates all the intelligent single elevator monitoring systems in a city, an operation state of any elevator is monitored online in real time by means of a terminal, and a navigation positioning system is combined by means of feedback communication and an intelligent maintenance and protection system, so as to achieve functions of faulty elevator device positioning and maintenance personnel positioning, and implement rapid order dispatching for maintenance, thus forming an operation and maintenance management and control integrated system for the urban in-service elevator.

IPC Classes  ?

• B66B 9/04 - Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically

Abstract

The present invention relates to the technical field of dynamic safety monitoring of elevator shafts, and provides a three-dimensional scanning reconstruction and deformation dynamic monitoring system for an elevator shaft. According to the present invention, real-time reconstruction of a three-dimensional data model of an elevator shaft is implemented by using a three-dimensional scanning system consisting of upper and lower three-dimensional scanners; dynamic monitoring of elevator guide rail deformation is implemented by means of a deformation monitoring system using vibration sensors; measurement of the running speed of an elevator is implemented by using a rotational speed sensor mounted at an output port of a traction machine. Therefore, data reference is provided for safe running and risk monitoring of elevators.

IPC Classes  ?

• B66B 9/04 - Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically

Abstract

The present invention relates to the technical field of elevator fault diagnosis. Provided are an online state inspection system for a hoisting rope of an elevator and an inspection method therefor. The system comprises a weak magnetic induction module, an image capture module, a controller, a computer, and an alarm and brake module, wherein the controller comprises a magnetic-field change determination module and an image information transmission module; the computer comprises an image processing module and a hoisting-rope state determination module; the weak magnetic induction module and the magnetic-field change determination module communicate with each other; the controller controls the image capture module to capture a hoisting rope image and transmits the captured hoisting rope image by means of the image information transmission module to the image processing module of the computer to perform preprocessing, hoisting-rope edge detection and contour fitting; and the hoisting-rope state determination module determines the state of a hoisting rope according to a contour fitting result, and transmits a determination result to the controller, and finally the controller controls the alarm and brake module according to the determination result, and the alarm and brake module raises the alarm and performs braking control on an elevator.

IPC Classes  ?

• B66B 9/04 - Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically

Abstract

The present invention relates to the technical field of elevator fault diagnosis, and provided thereby is an elevator safety fault diagnosis method based on multi-source information fusion. The method comprises: first, acquiring vibration signals of an elevator car and a reduction gearbox and a visual signal of an elevator car traction cable in the operation process of an elevator, performing data preprocessing on the acquired signals, and then extracting vibration signal features of the elevator car and the reduction gearbox and a transverse displacement signal feature of the elevator car traction rope; then, performing abnormal vibration signal detection according to the vibration signal features of the elevator car and the reduction gearbox to obtain an abnormal vibration signal detection result, and performing abnormal transverse displacement detection on the basis of the transverse displacement signal feature of the elevator car traction rope to obtain an abnormal transverse detection result; and finally, fusing the abnormal vibration signal detection result and the abnormal transverse displacement signal detection result, and on the basis of the fusion result, determining whether to generate an emergency stop fault alarm for the elevator. In the method, a fuzzy information fusion theory is used to implement real-time centralized monitoring of the operating states of multiple components of the elevator.

IPC Classes  ?

• B66B 5/00 - Applications of checking, fault-correcting or safety devices in elevators
• B66B 5/02 - Applications of checking, fault-correcting or safety devices in elevators responsive to abnormal operating conditions
• B66B 7/12 - Checking, lubricating, or cleaning means for ropes, cables, or guides

Abstract

A method and a system for determining a supporting structure by combining a stress environment and an underground surrounding rock structure are provided in the disclosure, which relates to the technical field of stability analysis of coal-mine rock mass. The method includes: defining a stress peak position and an in-situ stress position by determining the stress environment; identifying the underground surrounding rock structure, identifying lithology and constructing a three-dimensional model of a rock stratum to analyze damage degree of the rock stratum; pretreating, namely normalizing, the damage degree of the rock stratum at two sides and comparing the damage degree of the rock stratum at a roof and the floor; and identifying the supporting structure and determining supporting effectiveness and a supporting length. The method of the disclosure is different from related art, and ensures that the supporting structure meets mechanical foundation and practical engineering requirements as a whole.

IPC Classes  ?

• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry

Abstract

The present disclosure provides a heat supply device using an underground dry heat source. The heat supply device comprises a cold water supply device, a hot water suction pump and a heat supply pipeline, wherein the cold water supply device is arranged on the ground and used for injecting cold water into the heat supply pipeline; the hot water suction pump is connected with the heat supply pipeline; and the heat supply pipeline comprises a vertical well conduction section and a horizontal well heating section. The present disclosure further provides a heat supply method using the heat supply device using an underground dry heat source. The heat supply method comprises the followings steps: S1, exploring the underground dry heat source; S2, measuring the heat conductivity coefficient of hot dry rock; S3, drilling a well; S4, determining the number of branch wells; and S5, arranging a heat supply device.

IPC Classes  ?

• F24T 10/17 - Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes

Abstract

The present invention relates to the technical field of inspection test apparatuses. Provided are a test system and method for anchoring performance of a full-scale rock mass anchor bolt under a combined load. The system comprises a main frame, a co-directional tension and torsion loading mechanism and a vertical shear loading mechanism. The main frame comprises a double-parallel horizontal counter-force frame and a vertical counter-force frame, and the co-directional tension and torsion loading mechanism and the vertical shear loading mechanism are cooperatively arranged with the main frame. The co-directional tension and torsion loading mechanism can synchronously load tension and torsion of an anchored rock mass, the vertical shear loading mechanism can apply static loads and simulate dynamic load disturbances, and the co-directional tension and torsion loading mechanism and the vertical shear loading mechanism can perform loading independently. Using the test system can perform anchor bolt tension tests, anchor bolt body tension and torsion tests, anchor bolt body tension, torsion and shear tests, anchor bolt and anchored rock mass tests, and apply coupled loads of tension, shear and torsion to the same anchored fracture surface at the same time, so as to effectively test the comprehensive mechanical property of anchor bolt components in rock masses in a combined stress state.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/22 - Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
• G01N 3/24 - Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces

Abstract

The present disclosure discloses method for constructing a locomotive collaborative transportation scheduling system based on cyber-physical fusion, which provides a solution for multi-processor coordinated control of locomotive scheduling. The method includes the following steps: step 1, planning the actual on-site location of the device; step 2: constructing a distributed cyber-physical system collaborative architecture; step 3: describing the information transmission relationship between physical devices in a matrix manner to construct an information collaboration computing model; step 4: analyzing and selecting the matching controller type according to the device function implementation program; step 5: writing the controller function scheduling program to complete the construction of the locomotive collaborative transportation scheduling cyber-physical system, and realizing the locomotive automatic scheduling through this system.

IPC Classes  ?

• G06Q 10/0631 - Resource planning, allocation, distributing or scheduling for enterprises or organisations

Abstract

The present disclosure discloses a volleyball passing training device, which includes an angle adjustment mechanism and a ball hoop arranged on the angle adjustment mechanism. The angle adjustment mechanism includes a connecting piece connected to the ball hoop, and a first connecting rod and a second connecting rod respectively hinged to the connecting piece. A sliding device which can slide or fix on the second connecting rod is arranged on the second connecting rod. The first connecting rod is hinged to the sliding device. Connecting lines of the hinge points between the first connecting rod and the connecting piece and between the second connecting rod and the connecting piece and the hinge point between the first connecting rod and the sliding device form a triangle.

IPC Classes  ?

• A63B 69/00 - Training appliances or apparatus for special sports
• A63B 47/02 - Devices for handling or treating balls for picking-up

Abstract

It discloses a sustained release grouting material, a preparation method and an application thereof; the sustained release grouting material comprises a water swelling core and a water-soluble sustained release coating, the water swelling core is composed of bentonite, SAP and xanthan gum, which is granulated by disc granulator relying on the cohesiveness of xanthan gum; the water-soluble sustained-release coating is prepared by mixing water-soluble starch, polyvinyl alcohol, poloxamer, lubricant and plasticizer with deionized water to obtain a film-forming solution, and the film-forming solution is coated on a coating machine; the invention uses a coating machine to coat a layer of slow-release coating on the surface of the water-absorbing expansion core, and adjusts the coating thickness by controlling the mass ratio of the coating film-forming liquid to the water-absorbing expansion core particles, so as to realize the controllable water absorption onset time of the expansion core.

IPC Classes  ?

• C04B 28/00 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
• C04B 24/16 - Sulfur-containing compounds
• C04B 40/00 - Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
• C04B 40/06 - Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers
• C04B 103/00 - Function or property of the active ingredients
• C04B 111/70 - Grouts

Abstract

A bidirectional self-regulating chemical flooding method and system for enhancing oil recovery includes: determining the average particle size of dispersed phase droplets under stable seepage flow of an oil-in-water emulsion according to the average reservoir permeability; determining injection concentration of an emulsifier which matches a target reservoir according to reservoir seepage velocity; under a condition of keeping the injection concentration of the emulsifier constant, determining the optimal injection concentration of a polymer which matches the injection concentration of the emulsifier through core flooding experiments with the maximum equivalent ton oil accumulation as a target; determining total injection amount of the emulsifier and total injection amount of the polymer for implementing well group units; and optimizing injection amount of the emulsifier and the polymer in each single well by using a numerical simulator of a chemical flooding reservoir.

IPC Classes  ?

• E21B 43/16 - Enhanced recovery methods for obtaining hydrocarbons

Abstract

The present invention relates to the technical field of mine fire prevention and extinguishing, in particular to a liquid nitrogen direct injection and low-temperature foaming intelligent filling system based on mine fire area characteristics and an application method, comprising a liquid nitrogen storage tank, a liquid nitrogen direct injection system and a low-temperature foaming system, wherein the liquid nitrogen storage tank communicates with a liquid nitrogen pressurizing device through a main pipeline; a temperature control unit is arranged on the main pipeline; and the liquid nitrogen pressurizing device is connected with the liquid nitrogen direct injection system and the low-temperature foaming system, respectively, liquid nitrogen is directly injected into a foam liquid, to prepare a low-temperature foam type fire preventing and extinguishing material by means of forced convection, membrane boiling, explosion boiling and nucleate boiling between the liquid nitrogen and water.

IPC Classes  ?

• E21F 5/06 - Fluids used for spraying
• A62C 5/02 - Making of fire-extinguishing materials immediately before use of foam

Abstract

A rock stratum grouting and water plugging test device and method under a mining coupling condition, relating to the technical field of permeability testing. The device comprises a solution box (1), a test box (2), a press plate replacement box (5), a grouting pump (3), a recovery pool (4), and a water pump (7), wherein the solution box (7) is connected to the test box (2) by means of a liquid injection pipe (9), the bottom of the test box (2) is connected to the press plate replacement box (5), the press plate replacement box (5) is connected to a bottom plate (28), and the bottom plate (28) is connected to a control panel (6). According to the device, the performance influence test of a grouting material under a single-factor or multi-factor coupling effect of temperature, water quality, crack width, angle and roughness can be carried out, and the influence test of a single-factor or multi-factor coupling effect of temperature, water quality, water pressure, water flow and grouting pressure on the grouting effect can be carried out. According to the device, the temperature, the water injection pressure and flow, the temperature inside the box, the ion solution concentration, the leaching area, the grouting pressure, the water pressure, the water flow and the like can be controlled, and convenience is provided for related research of grouting materials and grouting effects.

IPC Classes  ?

• G01N 13/00 - Investigating surface or boundary effects, e.g. wetting powerInvestigating diffusion effectsAnalysing materials by determining surface, boundary, or diffusion effects
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces

Abstract

A dynamic loose vehicle formation method based on real-time online navigation map, which belongs to the field of vehicle formation technologies. The method includes a driver inputs travel information of a destination and waypoints in a GIS app; the GIS app uploads the travel information to a GIS server; the driver chooses to join a recommended formation or create a formation in the GIS app; when the driver chooses the formation and joins the formation, the formation information is displayed on the GIS app interface and sent to other vehicles within the formation for information interaction; when the driver chooses to leave the formation and leaves the formation, the formation is adjusted and the GIS server updates the formation information.

IPC Classes  ?

• G08G 1/127 - Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles to a central station
• G01C 21/00 - NavigationNavigational instruments not provided for in groups
• G01C 21/34 - Route searchingRoute guidance
• G01C 21/36 - Input/output arrangements for on-board computers

Abstract

A spindle deceleration energy-saving method for a no-load process between adjacent cutting activities of a numerical control machine tool. The method comprises: collecting a state rotational speed of a spindle and a no-load interval time between adjacent cutting activities; acquiring energy consumption of a numerical control machine tool in each motion state; on the basis of the state rotational speed of the spindle and the energy consumption of the numerical control machine tool in each motion state, acquiring energy consumption of the machine tool in a no-load motion process and energy consumption during the implementation of a spindle deceleration strategy; and presetting a precondition for energy saving, when the energy consumption of the machine tool in the no-load motion process, the energy consumption during the implementation of the spindle deceleration strategy and the no-load interval time meet the precondition for energy saving, acquiring a spindle deceleration energy-saving critical time, and when the no-load interval time is greater than the spindle deceleration energy-saving critical time, performing spindle deceleration in a no-load interval. By means of the method, the rotational speed of a spindle during no-load operation of a numerical control machine tool is decreased to reduce energy consumption of the machine tool in a no-load process, so as to increase the energy utilization rate of the machine tool, thereby avoiding the loss of a main transmission system and an electric motor caused by frequent starting and stopping of the machine tool.

IPC Classes  ?

• G05B 19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form

Abstract

Provided is a steam jet multifunctional aircraft deicing vehicle with steam jet, includes a vehicle body, where a steam generating assembly is arranged in the vehicle body, and the steam generating assembly is connected with a steam conveying assembly. A moving assembly is rotatably connected above the vehicle body, and the moving assembly is rotatably connected with an execution assembly. The execution assembly includes a first spray head assembly and a second spray head assembly. The steam conveying assembly includes a first supercharger and a second supercharger arranged side by side, where an air outlet end of the first supercharger is communicated with one end of a first air outlet pipe, and an other end of the first air outlet pipe is communicated with spray heads of the second spray head assembly through a first air pipeline.

IPC Classes  ?

• B64F 5/23 - Ground installations for de-icing aircraft by liquid applicationSpraying installations therefor, e.g. fitted on vehicles
• B05B 13/00 - Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups

Abstract

A method, system and apparatus for evaluating and controlling the time-energy efficiency of a numerical control machine tool. The method comprises: the influence of factors such as the startup rate and extra startup number of times of numerical control machine tool equipment on the energy efficiency of the numerical control machine tool is comprehensively analyzed, and a mathematical model of the time-energy efficiency of the numerical control machine tool and the startup rate and extra startup number of times of the numerical control machine tool is constructed. The time-energy efficiency of the numerical control machine tool is monitored in real time, so that an over-limit alarm function of the time-energy efficiency of the numerical control machine tool is achieved, and finally, the time-energy efficiency of the numerical control machine tool is controlled within a target range. The influence of shutdown loss of the numerical control machine tool on the energy efficiency of the numerical control machine tool is analyzed, and an over-limit alarm for the time-energy efficiency of the numerical control machine tool can be achieved. Therefore, corresponding measures can be taken quickly and in a targeted manner during machining, and the method is a low-carbon and practical method for evaluating and controlling the energy efficiency of a machine tool.

IPC Classes  ?

• G05B 19/408 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data

Abstract

The present disclosure provides a grouting and water-plugging device for a fractured rock in a mine coupling state and a test method, and relates to the technical field of rock mechanics testing. The device includes a pressurizer, a reservoir, a test box, and a grouting pump. The reservoir includes a temperature sensor and a pressing-water plate. The pressing-water plate is connected to the pressurizer through a pressurizing rod. A pressure measuring pipe and a drainage pipe are installed on an outer side of the reservoir. The reservoir is connected to a water pump through a water injection pipe. The test box includes a rock, a transverse force exerting plate, a longitudinal force exerting plate, a stress sensor and the temperature sensor. The longitudinal force exerting plate is provided with multiple water through holes. A sliding box door is hinged to a front wall of the test box. The pressure measuring pipe and the drainage pipe are installed on a rear wall of the test box. The rear wall of the test box is connected to the grouting pump through a grouting pipe. A water pressure gauge is installed on the grouting pipe. Valves are installed on the grouting pipe, the pressure measuring pipe, the water injection pipe, and the drainage pipe. The device can be used to conduct a test, simulating coupling conditions of stress-temperature-water pressure in a mine, for a rock, and to verify the effectiveness of water plugging.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 33/24 - Earth materials

Abstract

The present disclosure relates to a hydraulic support with a quick response function for coal wall spalling, which includes a base, an upright post, a top beam, an extensible canopy, a face guard, and a vibration meter. The vibration meter is mounted on a hydraulic support, and detects a vibration signal of a coal wall in a non-contact mode. The face guard includes a primary face guard, a secondary face guard, and a tertiary face guard connected in sequence. One side, close to a coal wall, of the primary face guard is connected to a quick response device. The quick response device is in signal communication with the vibration meter. After receiving the vibration signal of the coal wall, the quick response device is abutted against the coal wall before the secondary face guard and the tertiary face guard fit the coal wall.

IPC Classes  ?

• E21D 23/03 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyors, mining machines or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
• E21D 23/00 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyors, mining machines or guides therefor
• E21D 23/04 - Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of propsMeans for counteracting lateral sliding on inclined floor
• E21D 23/16 - Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

A system for deformation measurement in an indoor rock mechanics test based on a cable sensing technology and a method, relating to the technical field of rock mechanics tests. The system comprises a strain sensor, a coal rock sample (1), a monitoring apparatus, and a computer. The strain sensor comprises a coaxial cable (2), a joint press-fit device (6), and a male connector (5). The joint press-fit device (6) is disposed on the coaxial cable (2). The strain sensor determines an attachment manner on the basis of the coal rock sample (1) and to-be-measured parameters. The monitoring apparatus comprises a vector network analyzer (7) and a terminal load (3). The computer processes and records collected data, records frequency values of feature valleys corresponding to reflection points, and calculates strain values between the reflection points by means of data conversion, to determine displacement parameters. According to the method, strain and deformation at a surface of the sample, inside the sample, and near any cracks in the sample during deformation and damage of the coal rock sample (1) can be monitored. The invention has advantages such as bendability, anti-interference, large measurement range.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 3/06 - Special adaptations of indicating or recording means
• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge

Abstract

The present invention relates to the technical field of intelligent calculation. Disclosed is a sensor network coverage optimization method based on a novel compact particle swarm algorithm. A novel compact particle swarm optimization algorithm is utilized to optimize network coverage of sensors. In the novel compact particle swarm optimization algorithm, the Pareto distribution is used to describe the location of a particle swarm, and a Gaussian perturbation policy is synchronously added. Sensors in a sensor network coverage optimization problem are equivalent to a particle swarm in the optimization algorithm. The sensors are randomly arranged in an initial environment, and then the locations of the sensors are moved and optimized according to the optimization algorithm. The coverage of the sensors after each movement corresponds to a fitness value in the algorithm. The locations of the sensors are determined according to the dimensions of particles and a three-dimensional simulated environment diagram. Finally, the locations of the sensors are rearranged according to the dimensions of the particles obtained by the optimization algorithm. In the present invention, by adopting an improved optimization algorithm, a sensor network can reach maximum coverage.

IPC Classes  ?

• H04W 16/10 - Dynamic resource partitioning

Abstract

A dynamic shear test device and method based on a Hopkinson bar system, relating to the technical field of rock detection tests. Rapid fixing of a cylindrical sample (8) is achieved by means of rapid assembly of fixed shells (6); the cylindrical sample (8) is limited in the left-right direction by means of a limiting rotating plate (4) and a limiting block plate (5), and the limiting rotating plate (4) mates with a spring limiting rod (17), so that the cylindrical sample (8) rotates under the limiting of an extrusion rotating block (14) of an extrusion block (13); a comparative experiment is carried out on one cylindrical sample (8), and under the action of the liquid pressure in cooperation with extrusion plates (12), the temperature environment of the cylindrical sample (8) is well maintained, and the extrusion plates (12) made of organic silicon materials enable the cylindrical sample (8) to be better fixed in a large pressure environment, and do not block the rotation of the cylindrical sample (8) in a low pressure environment, so that the test position can be conveniently switched; a threaded limiting rod (21) mates with holders (20), so that a tester can conveniently and quickly switch the state of the test device, and the test efficiency is improved.

IPC Classes  ?

• G01N 3/30 - Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

The present invention relates to the technical field of mine devices, and provides an anti-impact protection apparatus using anchor cables to form a mesh, and a use method. According to the present invention, in view of the problems that ejected coal rock blocks are easily stuck on existing protection meshes and the existing protection meshes cannot cushion and intercept the ejected coal rock blocks, which may easily cause the coal rock blocks to rebound to injure operators, the anti-impact protection apparatus using the anchor cables to form the mesh is provided. The apparatus comprises fixing mechanisms, the fixing mechanisms are provided on a heading machine, interception mechanisms are mounted on the fixing mechanisms, and a resistance mechanism and a tightening mechanism are provided on each interception mechanism. The interception mechanisms of the present invention intercept the ejected coal rock blocks, and first steel wire ropes and second steel wire ropes cushion the ejected coal rock blocks, thereby reducing the impact force of the coal rock blocks; the resistance mechanisms realize slow reset of the first steel wire ropes and the second steel wire ropes, so as to prevent the intercepted coal rock blocks from being ejected due to the reset thereof; and the tightening mechanisms realize the interception and clasping of the coal rock blocks while preventing the coal rock blocks from being stuck in holes of the mesh.

IPC Classes  ?

• E21C 35/04 - Safety devices

Abstract

A cyclic dynamic loading-confining pressure instantaneous unloading test device includes a load-supporting frame system, a cyclic dynamic loading system, a confining pressure loading system, a monitoring system, a control system and a data analysis system; the top of the load-supporting frame system is equipped with the cyclic dynamic loading system, the cyclic dynamic loading system is connected with the control system, the bottom of the load-supporting frame system is equipped with the confining pressure loading system, the cyclic dynamic loading system and the confining pressure loading system are equipped with the monitoring system, the monitoring system and the control system are connected with the data analysis system.

IPC Classes  ?

• G01N 3/34 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
• G01N 3/04 - Chucks
• G01N 3/38 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
• G01N 33/24 - Earth materials

Abstract

A monitoring and controlling method for a supporting pose of a hydraulic support includes reading length parameters of props; establishing a pose monitoring mathematic model; based on an interpolation algorithm, obtaining pose parameters including associated pose parameters of an angle of height, an angle of roof attachment, and angles of inclination of the props. The method further includes based on the support pose monitoring process, determining a current supporting pose; obtaining a contour line of a roof above the support, and determining a bulging edge of the roof; obtaining a height difference of a support canopy and the roof; calculating a target height and a target angle of roof attachment of the hydraulic support; based on a pose control mathematic model, calculating a target angle of height of the support; and substituting the target parameters into the pose monitoring mathematic model to solve target lengths of the props.

IPC Classes  ?

• G05D 3/20 - Control of position or direction using feedback using a digital comparing device

Abstract

A long-endurance self-powered ocean buoy, comprising a buoy body (01), a power generation device (03) and an air bag base (02). The power generation device (03) is mounted at a lower end of the airbag base (02) and comprises a housing (1), a first power generation assembly, a second power generation assembly (6) and a storage battery (5). The first power generation assembly comprises: a plurality of air chambers, which are in communication with each other, a hydraulic bag (7) and a control integration unit, wherein the lowest air chamber is filled with a volatile working medium, and the air pressure generated by the volatilization of the working medium is utilized to drive a power generation fan in a turbine (8) on a vent pipe (9), which communicates adjacent air chambers, to generate power. The second power generation assembly (6) comprises a plurality of temperature difference energy modules, which each have one end surrounded by a phase change material and the other end coming into contact with the housing. The long-endurance self-powered ocean buoy generates power itself during the process of floating upwards and diving, a generated electric current is rectified and then stored in the storage battery, and same is then supplied to a buoy power supply, such that the endurance capability of the ocean buoy is greatly improved.

IPC Classes  ?

• B63B 22/00 - Buoys
• F03G 7/05 - Ocean thermal energy conversion, i.e. OTEC

Abstract

A dynamic load shearing test device and method based on a hopkinson bar system are provided in this disclosure, which relates to the technical field of rock detection tests. The device according to the disclosure includes a bearing frame, a carriage, a sample holding unit, a pressure environment generating unit, a sample switching unit, an incident bar and a transmission bar, and the test method includes following steps: test device assembly, device leveling, pre-test preparation, test conducting, sample angle switching and test device resetting. The disclosure has advantages that the cylindrical sample can be quickly fixed, a required temperature environment can be well maintained, the cylindrical sample can be better fixed in a high-pressure environment, rotation of the cylindrical sample is not hindered in a low-pressure environment, switching of test positions is facilitated, and test efficiency can be accelerated.

IPC Classes  ?

• G01N 3/04 - Chucks
• G01N 3/24 - Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces

Abstract

An anchor cable water diversion device for a rock burst risk mine, provided with a clamping mechanism (2); when a pressure sleeve (206) is pressed downwards, clamping jaws (203) get away in the circumferential direction, and after sleeving the water diversion device on an anchor cable, the pressure sleeve (206) is loosened to enable the clamping jaws (203) to clamp the anchor cable to complete mounting; the clamping jaws (203) are fixed by means of a locking assembly (209), so as to prevent the device from swinging, and make the device more firmly mounted on the anchor cable; a sealing mechanism (3) is arranged, so that when an anchor cable port is inserted into a rubber sleeve (302), the rubber sleeve (302) wraps the anchor cable port, and squeezes a fourth spring (303) during a downward pressing process, thus making the fourth spring (303) keep a certain squeezing force, and achieving a better sealing effect; and a steering mechanism (4) is arranged, when the direction of a water outlet pipe (10) is adjusted, a toothed disc (402) is made to slide upwards, so that the toothed disc (402) loses fit with a toothed circular tube (404), the toothed circular tube (404) is rotated to adjust the direction of the water outlet pipe (10), and then the toothed disc (402) is reset and fit with the toothed circular tube (404) again, thus manually changing the direction of the water outlet pipe (10) without removing the water diversion device.

IPC Classes  ?

• E21F 16/00 - Drainage
• E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection

Abstract

Disclosed in the present invention is an oil port resource optimization scheduling method, comprising: step S11: establishing a lower-level scheduling model; step S12: establishing an upper-level scheduling module; step S13: using a multi-objective evolutionary algorithm to solve the lower-level scheduling model and the upper-level scheduling model; and step S14: determining a target berth and a berthing sequence of an oil tanker according to a solving result. According to the present invention, on one hand, the operation of the whole oil port can be ensured to be relatively balanced and relatively stable under the factor conditions of multiple storage tanks and multiple oil pipelines, and on the other hand, control targets of maximum profit of an oil port wharf and minimum total in-port time of the oil tanker can be achieved, the present invention is an optimal scheduling solution, and compared with a traditional manual compilation method, the intelligence and rationality are both obviously improved.

IPC Classes  ?

• G06Q 50/28 - Logistics, e.g. warehousing, loading, distribution or shipping

Abstract

a coal mine seismic event generation and seismic wave response monitoring method and apparatus. The apparatus comprises: a frame that is height-adjustable and used for simulating a high level hard and thick rock strata distribution structure being mined at the work face of a mine; a strong mine seismic event triggering apparatus used for simulating the generation of a seismic event; an equivalent energy calculation method used for simulating the generation of a strong seismic event; and a ground surface building model and a seismic wave response monitoring apparatus. The physically implemented apparatus and the method can simulate the mechanical process of triggering a high energy strong mine seismic event by the rupture of a high level hard and thick rock stratum, and can simulate the process and occurrence of multiple strong mine seismic events being triggered by the rupture of a plurality of high level hard and thick rock strata. Calculating the actual energy of a hypocenter at the work site allows for the source of the energy of a strong mine seismic event to be evidence-based, and the actual effect of a mining seismic effect on ground surface and downhole buildings can be obtained according to a hypocenter → surrounding rock media → target object actual propagation path, which conforms to the real conditions of a site.

IPC Classes  ?

• G01V 1/104 - Generating seismic energy using explosive charges
• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection

Abstract

A collaborative erosion-control method of releasing-splitting-supporting based on coal mass pressure relief and roof pre-splitting provided by the disclosure includes the following steps: step 1, driving into a coal seam to release pressure; step 2, low roof pre-splitting during driving process; step 3, supporting of roadway surrounding rock and support reinforcement; step 4, floor destressing of the roadway; step 5, high roof pre-splitting before mining; step 6, destressing and supporting of the advanced roadway surrounding rock during the mining process of the working face. The collaborative erosion-control method of releasing-splitting-supporting based on coal mass pressure relief and roof pre-splitting, and to carry out local pressure relief, roof pre-splitting and reinforcement support construction in the whole cycle of the coal working face in a progressive manner, so as to achieve the prevention and control of rock burst in the working face.

IPC Classes  ?

• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21D 21/02 - Anchoring-bolts for roof, floor, or shaft-lining protection having means for indicating tension
• E21D 20/00 - Setting anchoring-bolts

Abstract

The present invention relates to the technical field of coal mine rock burst prevention and control, and provides a releasing-cracking-supporting cooperative burst prevention method based on coal body pressure relief and roof pre-cracking. The releasing-cracking-supporting cooperative burst prevention method based on coal body pressure relief and roof pre-cracking of the present invention comprises the following steps: step 1, pressure relief by driving into a coal seam; step 2, pre-cracking of a low-position roof during driving; step 3, supporting of roadway surrounding rocks and supporting reinforcement; step 4, pressure relief of a roadway floor; step 5, pre-cracking of a high-position roof before mining of a working face; and step 6, advance pressure relief and supporting of the roadway surrounding rocks during stoping of the working face. According to the releasing-cracking-supporting cooperative burst prevention method based on coal body pressure relief and roof pre-cracking of the present invention, local pressure relief, roof pre-cracking and supporting reinforcement construction are progressively performed in all periods of the stoping working face of a coal mine, thereby preventing and controlling the rock burst of the stoping working face.

IPC Classes  ?

• E21C 41/18 - Methods of underground miningLayouts therefor for brown or hard coal
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

An intelligent control system for an emulsion pump comprises an emulsion pump (6), a housing (8), a coupling (9), a motor (10), a liquid supply tank (1), and an industrial personal computer (15). The emulsion pump (6) is embedded in the housing (8) and is connected to the motor by means of the coupling (9); the liquid supply tank (1) is connected to a filter core (4), and an outlet end of the filter core (4) is connected to the emulsion pump (6); a liquid level sensor (14) and a pressure sensor (12) provided in the liquid supply tank (1), a pressure relief valve (13) provided on the liquid supply tank (1), a mass sensor (3) outside the filter core (4), a PH sensor (7) provided in the housing (8), and a temperature sensor (11) mounted outside the housing (8) are all electrically connected to the industrial personal computer (15). The system is high in automation degree and reliability.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 49/02 - Stopping, starting, unloading or idling control

Abstract

Disclosed are a compound impact-resistant device and an application thereof. The compound impact-resistant device includes an inner cylinder, a first pressure sensor and an outer cylinder; an inner cavity of the inner cylinder is connected to a magnetorheological damper, a spiral valve element, a floating piston and a spring from bottom to top; and the outer cylinder is connected to a piston rod, a bottom end of the piston rod penetrates a top of the inner cylinder, the spring and the floating piston to be connected to the spiral valve element, and a portion below the spiral valve element is filled with hydraulic oil. The compound impact-resistant device can provide specific initial support force and achieve active self-adaptation to dynamic impact, thus solving the problems that traditional hydraulic buffers cannot provide initial support force and traditional mechanical crushing members have difficulty in providing large support force.

IPC Classes  ?

• F16F 13/00 - Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
• F16F 9/34 - Special valve constructionsShape or construction of throttling passages
• F16F 9/36 - Special sealings, including sealings or guides for piston-rods
• F16F 9/53 - Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
• F16F 7/12 - Vibration-dampersShock-absorbers using plastic deformation of members
• F16F 9/32 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium Details

Abstract

An intelligent control system for a high-pressure and high-flow emulsion pump station. The system comprises a high-flow water treatment system (1), a high-flow automatic liquid preparation apparatus (3), a large-capacity emulsion tank (8), a high-flow emulsion supply station (14), a high-pressure backwash filtering station (19), an emulsion pump and a pipeline booster pump. The control system can realize on-line monitoring and automatic liquid preparation, ensure that the internal and external pressure of a pipeline are balanced, eliminate pipeline vibration and meet the control requirements of a pump station system for medium contamination.

IPC Classes  ?

• E21F 17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere
• C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

Abstract

A dual-helical-gear speed reduction structure, comprising an input shaft, a high-speed shaft, a high-speed-level helical gear, a low-speed-level helical gear, a low-speed shaft, and an output shaft. The input shaft and the high-speed shaft are coaxially connected by means of a high-speed-level shaft coupling; a high-speed-level buffer pad is arranged between the high-speed shaft and the high-speed-level shaft coupling in an axial direction, and the input shaft is equipped with a high-speed-level brake drum; the output shaft and the low-speed shaft are coaxially connected by means of a low-speed-level shaft coupling, a low-speed-level buffer pad is arranged between the low-speed shaft and the low-speed-level shaft coupling in the axial direction, and the output shaft is equipped with a low-speed-level brake drum; the high-speed-level helical gear is fixedly installed on the high-speed shaft, the low-speed-level helical gear is fixedly installed on the low-speed shaft, the high-speed-level helical gear is engaged with the low-speed-level helical gear, and the high-speed-level helical gear and the low-speed-level helical gear have the same normal modulus, normal pressure angle, transverse modulus and transverse pressure angle. According to the present invention, the gear reduction error can be reduced, the gear reduction reliability is improved, and the engagement transmission performance is better than traditional spur gear engagement transmission.

IPC Classes  ?

• F16H 1/08 - Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes the members having helical, herring-bone, or like teeth

Abstract

A crankshaft of a seven-bellcrank six-support structure. A through-type central lubricating oil hole (20) is formed in the crankshaft and located at the rotation center of an input shaft (1); branch lubricating oil holes communicated with the through-type central lubricating oil hole (20) are formed in all connecting rods; the front three bellcranks and the rear three bellcranks of the crankshaft are mirror-symmetrically distributed relative to a middle bellcrank; and a keyway (28) is formed on the input shaft (1) of the crankshaft. The crankshaft is different from a traditional seven-bellcrank that needs eight supports, and only needs six supports, is smaller in required size, and is not fully supported. Further provided is a machining method for a crankshaft, comprising the following steps: performing rough machining on the crankshaft by using a turning-milling composite machining center, i.e., sequentially performing rough turning, fine turning, fine milling, and milling machining on a keyway (28), and performing drilling machining on a through-type central lubricating oil hole (20) and all branch lubricating oil holes; and performing fine grinding on the crankshaft by using a numerically controlled crankshaft grinding machine. According to the method, a high-precision device is used for machining, so that high-speed cutting machining can be achieved, a requirement for machining precision can also be satisfied, guarantee is provided for the machining precision of a seven-bellcrank six-support crankshaft, and the machining efficiency of the crankshaft is improved.

IPC Classes  ?

• F16C 3/08 - Crankshafts made in one piece
• F16C 3/14 - Features relating to lubrication
• F16C 3/06 - Crankshafts

Abstract

A vaneless contra-rotating compressor with multiple contra-rotating interfaces and application of the vaneless contra-rotating compressor is provided, which includes at least two vaneless contra-rotating interfaces. For each of the at least two contra-rotating interfaces, the contra-rotating interface corresponds to two of vaneless contra-rotating rotors. A rotating direction of an upstream rotor of the two vaneless contra-rotating rotors and a rotating direction of a downstream rotor of the two vaneless contra-rotating rotors are opposite. Rectifier stator vanes are not provided among all the rotors to supply sufficient inlet negative pre-swirl for the downstream rotors through the upstream rotors. Only the outlet guide vanes of the last stage, of the vaneless contra-rotating rotors are provided. The number of stages and the number of vaneless contra-rotating interfaces may be set flexibly according to the actual pressurization requirements.

IPC Classes  ?

• F04D 19/02 - Multi-stage pumps
• F04D 29/32 - Rotors specially adapted for elastic fluids for axial-flow pumps

Abstract

The present invention relates to the technical field of rock mechanics tests, and provides a grouting and water plugging device and test method for fractured rock in a mine coupling state. The device comprises a pressurizer, a water storage tank, a test box, and a grouting pump. The water storage tank comprises a temperature sensor and a water pressure plate; the water pressure plate is connected to the pressurizer by means of a pressurizing rod; pressure measuring pipes and drainage pipes are mounted on the outer side of the water storage tank; and the water storage tank is connected to a water pump by means of a water injection pipe. The test box comprises rock, transverse force applying plates, a longitudinal force applying plate, a stress sensor, and a temperature sensor; a plurality of water through holes are formed in the longitudinal force applying plate; a push-pull box door is hingedly connected to the front wall of the test box by means of a hinge member; pressure measuring pipes and drainage pipes are mounted on the rear wall of the test box; the rear wall of the test box is connected to the grouting pump by means of a grouting pipe; a water pressure gauge is mounted on the grouting pipe; and valves are mounted on the grouting pipe, the pressure measuring pipes, the water injection pipe, and the drainage pipes. The device is used for performing a rock simulation test under the stress-temperature-water pressure coupled condition in a mine, and the water plugging effect is verified.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

A three-dimensional dynamic and static load test system for simulating deep roadway excavation and a method thereof are provided, which relates to the technical field of indoor simulation testing in underground engineering. The system includes a mobile platform, a box body, a support frame, a roadway excavation device, and a data monitoring unit. The system and method of the disclosure can reproduce the whole process of roadway excavation, simulate the multi-directional loading of deep roadway, and restore the real stress state of deep roadway under the influence of dynamic and static load superimposed disturbance. The problem of insufficient research under the condition of unidirectional static loading and lack of multi-directional dynamic and static loading in current large-scale experimental devices has been solved, and the stress and deformation of the surrounding rock of the roadway are reflected in real-time through the data monitoring unit.

IPC Classes  ?

• G01N 3/34 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
• G01N 3/12 - Pressure-testing