A liquid pressure calibration apparatus, a first liquid path (200) and a second liquid path (300) having different pressure output ranges being arranged in parallel between a liquid pressure introduction port (A) and a liquid pressure output port (B) of the liquid pressure calibration apparatus; the pressure output range of the first liquid path (200) is continuous with the pressure output range of the second liquid path (300); a target pressure to be output is compared with a switching pressure; the first liquid path (200) or the second liquid path (300) is selected to supply pressure to the liquid pressure output port (B) according to the comparison result; and the target pressure is output.
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
F15B 3/00 - Intensifiers or fluid-pressure converters, e.g. pressure exchangersConveying pressure from one fluid system to another, without contact between the fluids
G01L 25/00 - Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
A temperature calibrator and a method for cooling a furnace core (14) thereof, which belong to the field of temperature control and can improve the cooling speed of the furnace core (14). The temperature calibrator comprises: a heating part (11) provided with a containing cavity (12) having an opening at one end; the furnace core (14), which is matched with the containing cavity (12) in shape and is inserted into the containing cavity (12) to form, between the furnace core and the inner wall of the containing cavity (12), an airflow channel (13) having an airflow outlet (13B) and an airflow inlet (13A); and an air source device (15), which blows airflow from the airflow inlet (13A) into the airflow channel (13) and discharges the airflow from the airflow outlet (13B). The temperature calibrator cools the furnace core (14) in this way: after the furnace core (14) is inserted into the containing cavity (12), the airflow channel (13) is formed between the periphery of the furnace core (14) and the inner wall of the containing cavity (12); and airflow is blown into the airflow channel (13) from the airflow inlet (13A) and discharged from the airflow outlet (13B), the airflow is thus directly blown to the furnace core (14). Therefore, the furnace core (14) is directly cooled, and the cooling speed of the furnace core (14) is increased.
A crimp terminal (100, 101, 102, 103), a crimp terminal module (200), a terminal box and a tester. The crimp terminal is used for connecting to a wiring end of a sensing element. A press button (03) of the crimp terminal is pressed to drive a wiring port (010), formed by attaching a first attachment sheet (05) to a second attachment sheet (05), to open, so as to insert the wiring end of the sensing element into the wiring port. Compared with a traditional screwing means, the crimp terminal can reduce heat generated by friction and reduce the contact potential between a plug and the terminal, and facilitates improving working efficiency of batch detection.
A method using a dry block temperature calibrator (1) to calibrate a short temperature measuring apparatus. A heat equalizing block (12) is disposed inside a furnace of the dry block temperature calibrator (1). Two temperature measuring holes (13), i.e., a first temperature measuring hole (131) and a second temperature measuring hole (132), are disposed in the heat equalizing block (12). A temperature control element (16) is disposed at the bottom of the furnace. The method comprises: electrically connecting a first standard temperature sensor (21) to a temperature control element (16) by means of sequential connection to a first measuring module (41) and a control module (5), so as to form a closed temperature feedback control loop; accurately controlling a temperature of the temperature measuring hole (13) in which the first standard temperature sensor (21) is located, and calculating a temperature difference between a probe of a temperature sensor to be calibrated (3) and a probe of a standard temperature sensor (2) respectively disposed in the two temperature measuring holes (13); and establishing a temperature field model library applicable to a plurality of heat equalizing blocks (12) of the dry block temperature calibrator (1), so as to rapidly calculate an actual temperature of the temperature sensor to be calibrated (3) and to rapidly calibrate the accuracy of the temperature sensor to be calibrated (3). The method has a wide range of applications, and is suitable for calibrating a variety of short temperature sensors.
A low-temperature dry body temperature calibrator, belonging to the technical field of temperature instrumentation calibration, being used for temperature calibration of an element of which the temperature is to be tested, and comprising a furnace body (1), a control panel assembly (2) and a housing which are of a modular design, the furnace body (1) and the control panel assembly (2) are assembled in the housing, the top surface of the housing is provided with a plurality of heat dissipation holes (62), the top of the control panel assembly (2) is spaced apart from the top surface of the housing, a flow guiding fan (26) is provided at the top of the control panel assembly (2), and a flow guiding plate (25) inclined to the heat dissipation holes (62) on the top surface of the housing is provided above the flow guiding fan (26). The provided furnace body (1) has a compact structure, and the radiators (11-1, 19-1) used therefor have a light weight and a high heat dissipation efficiency, improving the operation stability and temperature measurement accuracy of the furnace body (1), and the furnace body is suitable for temperature measurement of low-temperature elements of which the temperature is to be tested.
A flow guiding and heat dissipating type dry block temperature calibrator, which belongs to the temperature calibration field. The temperature calibrator comprises a furnace body (1) located in a housing (6) and at least one air flow generating device. The air flow generating device is provided on one side or at the periphery of the furnace body (1), and is one of or a combination of a gas passage C2, a flow guide fan (21), an air pump and a blower. The air flow generated by the air flow generating device is blown toward a handle (91) of a device being tested (9) that is inserted in the furnace body (1), such that the handle (91) is cooled, thereby preventing the sensor inside the handle (91) from failing due to high temperature, facilitating the heat dissipation of the internal electronic components of the instrument itself, and extending the service life of the temperature calibrator.
A high temperature dry block temperature calibrator, relating to the technical field of temperature calibration. The high temperature dry block temperature calibrator comprises a high temperature furnace (1), a control board module (2), a system board module (3), a measuring board module (4), a lower support (5), and a housing (6). The high temperature furnace (1) and the control board module (2) are mounted on the lower support (5). The system board module (3) and the measuring board module (4) are mounted on the front side surface of the housing (6). The housing (6) is clipped to the periphery of the lower support (5) and the high temperature furnace (1) and the control board module (2) are accommodated in the housing (6). The modules are independent of each other and can be removed separately, thereby facilitating maintenance and replacement. The high temperature dry block temperature calibrator can be used for calibrating the temperature of a high temperature element to be measured.
A pressure calibration apparatus and a pressure instrument calibration information processing method, belonging to the field of pressure instrument measurement and calibration. The pressure calibration apparatus comprises: a pressure calibration unit (1); an externally connected calibrated pressure instrument (100); a main control unit (2), which is electrically connected to the pressure calibration unit (1); a communication module (3), which is electrically connected to the main control unit (2), and performs data exchange with a remote database (300) via a network (200). The pressure calibration apparatus is in a real-time communication connection with the remote database (300), and implements on-site real-time downloading of historical calibration data and calibration schemes of the calibrated pressure instrument (100) and real-time uploading of current calibration data.
An instrument calibration device (100) and a calibration method using same. The instrument calibration device (100) comprises a physical quantity input/output unit (10), a physical quantity measurement unit (20), a physical quantity configuration unit (30), a display unit (40), a man-machine interaction unit (70), a storage unit (80), and a control unit (60). The instrument calibration device can be widely applied to automatic calibration of field multivariable instruments.
G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups
G01F 25/00 - Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
G01N 21/45 - RefractivityPhase-affecting properties, e.g. optical path length using interferometric methodsRefractivityPhase-affecting properties, e.g. optical path length using Schlieren methods
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
A fully-automated hand-held pressure calibrator, comprising a housing, and gas path components and circuit components installed in the housing. The gas path components comprise a pressure source capable of supplying a pressurized gas. The gas path components and circuit components are integrated and installed in the housing in a modular manner, and the shape of the housing is suitable to be held in a hand. The pressure calibrator of the present invention enables all kinds of functions including pressure generation, pressure control, pressure instrument connection, and recording, result calculation, and report output of a pressure calibration process, and is suitable for on-site and on-line calibration of a pressure instrument.
A method and a device for detecting the switching value of a pressure switch. The device comprises: a pressure generator (1) in communication with a pressure switch (8) by means of pressure piping (3), a pressure control element (2), a pressure sensor (4), and a controller (5) provided with a data processing unit. The pressure sensor (4) is installed on the pressure piping (3) and is electrically connected to the controller (5). The pressure control element (2) is electrically connected to the pressure generator (1) to control the pressure generator (1), and is electrically connected to the controller (5). The pressure sensor (4) transfers the pressure change of the pressure piping (3) to the controller (5) in real time, the data processing unit acquires the value of the pressure change and generates a control instruction according to a preset pressure change rule, and the pressure control element (2) controls the pressure generator (1) to change the pressure within the piping. The device and the method are used to complete the detection of the switching value of a pressure switch, fast detection is achieved, the detection accuracy is improved, the repeatability of the detection result is good, the manual operation cost is reduced and the operation is reliable.
Disclosed are a fold-back coaxial gas booster pump and a gas pressure creating method, belonging to the field of gas pressure creation. The fold-back coaxial gas booster pump comprises a primary gas cylinder, a primary piston, a secondary gas cylinder serving as a primary piston connecting rod, a pressure rod, a gas pump cover, a secondary piston and a piston connecting rod, wherein the primary gas cylinder, the secondary gas cylinder and the piston connecting rod are coaxially installed, and the rear end of the piston connecting rod penetrates through a first follow-up one-way valve installed in the primary piston and is fixed on the bottom wall of the primary gas cylinder, so that the two pistons move in opposite directions to boost the pressure. The fold-back coaxial gas booster pump is composed of a two-stage compression gas pump, and can realize two stages of compression during one movement, so that the gas compression reaches a higher pressure range, the gas compression efficiency is improved, the power required for compressing gas is reduced, and the fold-back design enables the product to be miniaturized. The fold-back coaxial gas booster pump is pressure creating equipment which is light in weight, convenient to carry and high in pressure, and is suitable for field instrument calibration.
F04B 25/04 - Multi-stage pumps specially adapted for elastic fluids having cylinders coaxial with, or parallel or inclined to, main shaft axis
F04B 37/12 - Pumps specially adapted for elastic fluids and having pertinent characteristics not provided for in, or of interest apart from, groups for special use to obtain high pressure
14.
MULTI-RANGE FIELD FULL-AUTOMATIC PRESSURE AND ELECTRIC SIGNAL CALIBRATING INSTRUMENT
Provided is a multi-range field full-automatic pressure and electric signal calibrating instrument, comprising: control components such as a shell (9), a power switch (94), multiple-interfaces (95), a display (91), a keyboard (92), and a gas pressure generating unit (1), a power supply unit (3), a pressure detecting unit (4), a gas pressure control unit (2) and an electric signal detecting unit (5); the pressure output end of the pressure control unit (2) is in parallel connection with pressure joints which are used for installing multiple pressure standard meters (60) and detected meters (7) with different ranges; the pressure control unit (2) is in signal connection with the pressure standard meters (60); the electric signal detecting unit (5) is in signal connection with the pressure control unit (2) and the detected meters (7); the power supply unit (3) can supply power by batteries. The calibrating instrument does not need to be externally connected with a gas cylinder and an alternating current power supply and can automatically generate a gas pressure and generate an accurate standard pressure; the design of the multi-range pressure standard meter can be suitable for various detected meters; the double detection and calibration for pressure and electric signals can be implemented; the weight and volume of the instrument are small; and the multi-range field full-automatic pressure and electric signal calibrating instrument is convenient to carry in the field and can carry out automatic calibration on various field pressure instruments.
09 - Scientific and electric apparatus and instruments
Goods & Services
Gauges; surveying apparatus and instruments; meters; thermostats; pressure gauges; pressure measuring apparatus; pressure indicators; thermometers, not for medical purposes; furnaces for laboratory experiments; measuring devices, electric; all of the aforementioned goods do not include material testing instruments, material testing machines and other material testing devices, material test chambers.
09 - Scientific and electric apparatus and instruments
Goods & Services
Electric meters; Flow meters; Furnaces for laboratory experiments; Manometers; Pressure gauges; Pressure indicators; Surveying machines and instruments; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Thermometers not for medical use; Thermostats
