A method and machine (10) for stud installation are described. The machine comprises: a support arrangement (20) configured to support a tyre (14) and a shaft (12) on which the tyre is mounted for angular displacement about a longitudinal axis of rotation, and a stud insertion arrangement (22), at least part of which is displaceable relative to a tyre supported on the support arrangement, and which is configured to insert studs into holes in the tyre.
A valve (19.1) is described that includes: a flow path connecting a housing inlet (42) and outlet (44); a valve seat (48)) positioned in the flow path; a closure member (50) displaceable between a closed position and an open position; and a throttle element (52) displaceable together with the closure member. The throttle element comprises a front portion (70) of increasing cross-sectional area, a frusto-conical rear portion (72), and an intermediate portion (74) sufficiently long so that the intermediate portion enters a guide portion (49) of the flow path before a seal (56) makes contact with the valve seat. The throttle element is configured progressively to decrease the effective cross-sectional area of the flow path as the closure member is displaced form its open position towards its closed position.
A valve (18.1) includes a first and second port (50, 52) connected by a flow path to allow medium containing solid particles to pass therethrough. The valve also includes a valve seat (61), a closure unit (62), and a cavity (85) configured to receive at least part of the closure unit. The closure unit further comprises (i) a barrier piston (74) inhibiting the flow of solid particles from the second port when the closure unit is in its closed position; (ii) a bleed passage connecting the cavity with the second port to provide a pressure balancing arrangement that reduces a pressure therebetween, and (iii) a downwards sloping top extending from a central portion of the barrier piston to the outer surface of the barrier piston to permit fine particles in the cavity to settle through the bleed passage towards the second port.
A pumping system for pumping a medium, such as polymetallic nodules in sea water, comprises: at least one pressure exchange chamber having a valve arrangement at each end: a medium inlet at one end of the chamber operable to receive a medium; and a filling pump located at an opposite side of the chamber to the medium inlet. and being operable to draw medium from the medium inlet. through the chamber, and towards the filling pump to fill the chamber without the medium in the chamber having come into contact with the filling pump.
A valve body defining a longitudinal axis and comprising: (i) a central valve body portion comprising: (a) a valve seat engagement surface, (b) a support surface extending from the valve seat engagement surface, and (c) a valve stem extending from the support surface along the longitudinal axis; and (ii) an annular support mounted on the support surface around the valve stem and defining: (a) a stem aperture through which an upper portion of the valve stem extends, (b) an upper cap portion and (c) a frusto-conical portion extending from the valve seat engagement surface to the upper cap portion.
A distribution manifold for a pressure exchange chamber pumping system having a plurality of pressure exchange chambers arranged in parallel. The distribution manifold includes: a hollow manifold body defining a distribution chamber: an inlet leading into the body and connectable in flow communication with a medium supply: and a plurality of spaced apart outlets opening operatively upwardly out of the body. each outlet being connectable in flow communication with a medium inlet valve of a pressure exchange chamber.
A frame (12) for demounting a tyre from an HPGR shaft is disclosed. The frame comprises: a support comprising a plurality of structural beams (42a,c,d) adapted to rest on a surface; a registration pin (46) upstanding from the support and dimensioned to be accommodated within a bore defined by the shaft; a tyre support (60) at least partially surrounding the registration pin; and a dampener arrangement (76) mounted on the tyre support and being configured to engage with a lower surface of a tyre to provide balanced support around the circumference thereof, the dampener arrangement including at least one dampener. A method of demounting a tyre from an HPGR shaft is also described.
Processing crushed ore to separate ore having a high gangue concentration from ore having a high valuable mineral concentration is described. The method comprises: (i) classifying the crushed ore into at least two dry streams, (a) a large particle dry stream consisting essentially of particles larger than a defined size and (b) a small particle dry stream consisting essentially of particles smaller than a defined size; (ii) routing the small particle dry stream through a first air classifier configured to split the particle stream based on weight so that heavier particles are routed through to a first processing stream, and lighter particles are diverted to a second processing stream; (iii) routing the processing stream that most closely matches the valuable mineral density to a mineral extraction stage, and (iv) routing the other processing stream to tailings.
B03B 7/00 - Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
B03B 9/00 - General arrangement of separating plant, e.g. flow sheets
B07B 4/04 - Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall in cascades
B07B 9/00 - Combinations of apparatus for screening or sifting or for separating solids from solids using gas currentsGeneral arrangement of plant, e.g. flow sheets
B07B 9/02 - Combinations of similar or different apparatus for separating solids from solids using gas currents
A valve (10) defines a longitudinal axis (12) and comprises a valve seat (28) and a valve body (50) for positioning in a flow path. The valve seat (28) comprises: (i) a radially inner portion (84) for engaging with a contact area of the valve body (50) and extending substantially at a first angle (85) greater than 40 degrees but less than 80 degrees relative to the longitudinal axis (12), and (ii) a radially outer portion (86) extending from the radially inner portion (84) substantially at a second angle (87) smaller than 38 degrees but greater than 10 degrees relative to the longitudinal axis (12), the radially outer portion (86) located outside the contact area such that the valve body (50) is not in contact with the radially outer portion (86) when the valve (10) is closed.
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
A dump valve arrangement (32) for use with a discharge riser (20) comprises: a settling chamber (66) configured to couple to a lower portion of the discharge riser, a dump valve (72) operable to permit or prevent the flow of medium from the discharge riser into the settling chamber; pressurising bypass line (38) operates as a compression input to the settling chamber to pressurise the settling chamber to reduce a pressure differential between the settling chamber and the lower portion of the discharge riser prior to opening the dump valve; a decompression output (76, 78) to reduce the pressure in the settling chamber after the dump valve has opened; and an outlet (70) for emptying the contents of the settling chamber once the pressure in the settling chamber has reduced sufficiently.
E21C 50/00 - Obtaining minerals from underwater, not otherwise provided for
E21F 13/04 - Transport specially adapted to underground conditions in gravity inclinesTransport specially adapted to underground conditions in staple or inclined shafts
E02F 3/90 - Component parts, e.g. drives, control devices
E02F 3/94 - Apparatus for separating stones from the dredged material
F04B 47/04 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level the driving means incorporating fluid means
F04F 1/08 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells
A lateral wall assembly sensing system comprises: (i) a base plate; (ii) a wear-resistant layer having a rear surface mounted on a front side of the base plate and a front surface for mounting in close proximity to an edge of a grinding roller; (iii) a sensor mounted in a cavity defined in a rear side of the base plate and operable to measure a distance from the sensor to a front surface of the wear-resistant layer; and (iv) a collector coupled to the sensor for ascertaining a wear amount based on the received sensor distance measurement.
A self-actuated valve includes a valve body (10) and seat (28). The valve body comprises: (i) a seat engagement portion; (ii) an elastomer support portion; (iii) a circumferential nose; (iv) an upper closing member (92) having a lower surface (94) inclined towards the circumferential nose and a vent; (v) an internal corner where the elastomer support portion and the lower surface of the upper closing member meet; (vi) an elastomeric seal (54); and (vii) an expansion cavity. The elastomeric seal has (a) a lower external contact surface, (b) an upper external contact surface abutting against the lower surface (94) of the upper closing member (92) and extending beyond the circumferential nose, (c) an internal contact surface mounted on the elastomer support portion as an interference fit and extending from the circumferential nose to at least 60% of the length of the elastomer support portion and sliding up the elastomer support portion on valve closure.
A pressure exchange chamber comprises: a pressure exchange chamber pipe (12) extending around a perimeter; a driving fluid input valve (44) and a driving fluid output valve (46), both valves being enclosed by the pressure exchange chamber pipe; and a slurry input valve (34) and a slurry output valve (36), both valves being enclosed by the pressure exchange chamber pipe. A hydraulic ore hoisting system (HOHS) for use at sea comprising a plurality of such pressure exchange chambers is also disclosed.
F04F 1/08 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells
F04B 9/10 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
E21B 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
E21C 50/00 - Obtaining minerals from underwater, not otherwise provided for
A valve is described that includes: a housing (20); a flow path connecting an inlet and an outlet in flow communication; a valve seat (28) positioned in the flow path; and a valve body which is displaceable between a closed position and an open position. The valve body includes a resiliently deformable elastomeric seal (38) having (i) a contact surface (74) which is complementary to and abuts against the valve seat and (ii) a protrusion (84) extending radially outwards at an upper portion thereof. The valve also has a retainer comprising an inwardly projecting lip defining a recess for accommodating the protrusion therein to assist with lifting the elastomeric seal.0
A method and machine (10) for stud installation are described. The machine comprises: a support arrangement (20) configured to support a tyre (14) and a shaft (12) on which the tyre is mounted for angular displacement about a longitudinal axis of rotation, and a stud insertion arrangement (22), at least part of which is displaceable relative to a tyre supported on the support arrangement, and which is configured to insert studs into holes in the tyre.
B23P 5/00 - Setting gems or the like on metal parts, e.g. diamonds on tools
B23P 19/04 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
A valve (19.1) is described that includes: a flow path connecting a housing inlet (42) and outlet (44); a valve seat (48)) positioned in the flow path; a closure member (50) displaceable between a closed position and an open position; and a throttle element (52) displaceable together with the closure member. The throttle element comprises a front portion (70) of increasing cross-sectional area, a frusto-conical rear portion (72), and an intermediate portion (74) sufficiently long so that the intermediate portion enters a guide portion (49) of the flow path before a seal (56) makes contact with the valve seat. The throttle element is configured progressively to decrease the effective cross-sectional area of the flow path as the closure member is displaced form its open position towards its closed position.
A valve (18.1) includes a first and second port (50, 52) connected by a flow path to allow medium containing solid particles to pass therethrough. The valve also includes a valve seat (61), a closure unit (62), and a cavity (85) configured to receive at least part of the closure unit. The closure unit further comprises (i) a barrier piston (74) inhibiting the flow of solid particles from the second port when the closure unit is in its closed position; (ii) a bleed passage connecting the cavity with the second port to provide a pressure balancing arrangement that reduces a pressure therebetween, and (iii) a downwards sloping top extending from a central portion of the barrier piston to the outer surface of the barrier piston to permit fine particles in the cavity to settle through the bleed passage towards the second port.
A pumping system for pumping a medium, such as polymetallic nodules in sea water, comprises: at least one pressure exchange chamber having a valve arrangement at each end; a medium inlet at one end of the chamber operable to receive a medium; and a filling pump located at an opposite side of the chamber to the medium inlet, and being operable to draw medium from the medium inlet, through the chamber, and towards the filling pump to fill the chamber without the medium in the chamber having come into contact with the filling pump.
A distribution manifold for a pressure exchange chamber pumping system having a plurality of pressure exchange chambers arranged in parallel. The distribution manifold includes: a hollow manifold body defining a distribution chamber; an inlet leading into the body and connectable in flow communication with a medium supply; and a plurality of spaced apart outlets opening operatively upwardly out of the body, each outlet being connectable in flow communication with a medium inlet valve of a pressure exchange chamber.
A frame (12) for demounting a tyre from an HPGR shaft is disclosed. The frame comprises: a support comprising a plurality of structural beams (42a,c,d) adapted to rest on a surface; a registration pin (46) upstanding from the support and dimensioned to be accommodated within a bore defined by the shaft; a tyre support (60) at least partially surrounding the registration pin; and a dampener arrangement (76) mounted on the tyre support and being configured to engage with a lower surface of a tyre to provide balanced support around the circumference thereof, the dampener arrangement including at least one dampener. A method of demounting a tyre from an HPGR shaft is also described.
A high pressure grinding roll comprising a high pressure grinding roll module installed in a space envelope defined by an upper walkway support structure having an ore input area and a lower structural plinth having an ore output area.. The module comprises: (i) (i) a pair of upper support beams coupled to the upper walkway support structure; (ii) a pair of lower support beams mounted on the lower structural plinth; and (iii) a pair of counter-rotating grinding rollers mounted between the upper and lower support beams. The upper and lower support beams are dimensioned to provide full structural support for the pair of grinding rolls during operation so that the high pressure grinding roll module comprises a fully operational high pressure grinding roll, even prior to mounting of the module into the envelope defined by the upper walkway support structure and the lower structural plinth.
B02C 4/02 - Crushing or disintegrating by roller mills with two or more rollers
B02C 4/28 - Crushing or disintegrating by roller mills Details
B30B 3/04 - Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
The present invention relates to a wear detection apparatus for detecting wear of a grinding roll tyre, comprising: a housing; a scanning sensor supported within the housing; a controller coupled to the scanning sensor and operable to control the scanning sensor to scan a surface section of the grinding roll tyre to determine wear, or absence, of grinding studs on the grinding roll tyre; and at least one alignment sensor mounted within the housing operable to sense a reference mark on the grinding roll for determining a relative location or alignment position of the scanning sensor to the grinding roll, wherein the reference mark is an indentation or projection on a surface of the grinding roll. The invention further relates to a method of detecting wear of a grinding roll tyre and a grinding roll apparatus including the abovementioned wear detection apparatus.
A pumping system for pumping a medium is described. The system comprises: at least one transverse pressure exchange chamber, but preferably multiple pressure exchange chambers. Each pressure exchange chamber has a valve arrangement at each end. The system also includes a pressurised discharge at a delivery end of the system and a filling mechanism operable to fill the pressure exchange chamber with the medium. A positive displacement pump is operable to pump a driving fluid in direct contact with the medium so that the medium is pumped from the pressure exchange chamber to the pressurised discharge. A method of pumping a medium is also described.
F04B 47/04 - Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level the driving means incorporating fluid means
F04F 1/06 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
A dewatering system (12) for dewatering a slurry discharged from a riser (4) in a hydraulic ore hoisting system (10) to provide a driving fluid for use in said hydraulic ore hoisting system is described. The dewatering system comprises a primary cyclone (20) and a dewatering screen (26) for receiving a primary cyclone underflow stream (24) and having at least one upwardly sloping vibrating screen deck to create a lateral flow (38) from the underflow stream over the raised end of the deck and a vertical flow (36) from the underflow stream through the screen deck. The dewatering system also comprises a secondary cyclone (50) for receiving a combination of the primary cyclone overflow and the dewatering screen underflow to concentrate the remaining fine particles into a secondary cyclone underflow stream (54) to be recirculated to the vibrating screen deck of the dewatering screen, and a secondary cyclone overflow stream (52) suitable for use as a driving fluid.
A roll for a roller press suitable for comminution of granular material by interparticle crushing. The roll comprising a cylindrical body having an outer cylindrical pressing surface for use with an opposing roll in an interparticle crushing pressing nip and a plurality of outwardly extending wear-resistant surface studs positioned on the pressing surface. A strip element is provided on the outer cylindrical pressing surface of the cylindrical body.
This disclosure relates to a pump system for handling a slurry medium, the pump system comprising a pump unit (101) consisting of at least two reciprocating positive displacement slurry pumps, both pumps being arranged for alternating intake of slurry medium via a slurry suction inlet (103) and discharge of slurry medium via a slurry discharge outlet (103); a pump drive unit (104) for driving the at least two reciprocating positive displacement pumps of said pump unit; as well as a slurry damping pump unit (105) for damping discharge pulsations in the slurry medium being pumped.
F04B 9/117 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
A pumping system for pumping a medium is described. The system comprises: at least one transverse pressure exchange chamber, but preferably multiple pressure exchange chambers. Each pressure exchange chamber has a valve arrangement at each end. The system also includes a pressurised discharge at a delivery end of the system and a filling mechanism operable to fill the pressure exchange chamber with the medium. A positive displacement pump is operable to pump a driving fluid in direct contact with the medium so that the medium is pumped from the pressure exchange chamber to the pressurised discharge. A method of pumping a medium is also described.
E21C 50/00 - Obtaining minerals from underwater, not otherwise provided for
E21F 13/04 - Transport specially adapted to underground conditions in gravity inclinesTransport specially adapted to underground conditions in staple or inclined shafts
F04F 1/08 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells
F04F 1/14 - Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped adapted to pump specific liquids, e.g. corrosive or hot liquids
28.
A ROLL FOR A ROLLER PRESS, AS WELL AS A ROLLER PRESS PROVIDED WITH SUCH A ROLL
The invention relates to a roll for a roller press suitable for comminution of granular material by interparticle crushing, as well as a roller press provided with such a roll. In certain applications and under specific operational conditions the autogenous layer starts to displace or flow between the outwardly extending wear-resistant surface studs. This flow of granular material has a low velocity relative to the roll and can cause excessive wear to the base material of the outer cylindrical pressing surface of the roll, instead of protecting it.
This disclosure relates to a pump system for handling a slurry medium, the pump system comprising a pump unit (101) consisting of at least two reciprocating positive displacement slurry pumps, both pumps being arranged for alternating intake of slurry medium via a slurry suction inlet (103) and discharge of slurry medium via a slurry discharge outlet (103); a pump drive unit (104) for driving the at least two reciprocating positive displacement pumps of said pump unit; as well as a slurry damping pump unit (105) for damping discharge pulsations in the slurry medium being pumped.
F04B 9/117 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
Apparatus (machines) for filtering dust; apparatus
(machines) for filtering gases; apparatus (machines) for
filtering fumes; presses (machines for industrial purposes);
drum filters; filters (parts of machines or engines); vacuum
filters being parts of machines; centrifugal pumps; decanter
centrifuges incorporating screw conveyors; industrial
centrifugal decanting machines; drainage machines;
centrifugal drums; drums (parts of machines); spin driers
(not heated); fluid separation machines; screening machines;
soil screening machines; stone screening apparatus
(machines); separators (machines); steam/oil separators;
filters for machines; ore separators (machines); grain
separators; pressurising machines for drums; filters for
industrial purposes; apparatus (machines) for filtering
water. Process equipment for liquid-solid separation, including
clarifier-thickeners; apparatus for the treatment of solids
settled from liquids including sedimentation apparatus such
as clarifiers or thickeners.
Machines for filtering dust; machines for filtering gases; machines for filtering fumes from air; blanking presses; printing presses; rotary presses; drum filters for mining machines; filters for motors and engines; dust filters being parts of vacuum machines; centrifugal pumps; centrifugal decanting machines incorporating screw conveyors; industrial centrifugal decanting machines; drainage machines in the nature of drain jetters; centrifugal separator machines featuring drums; spin driers, not heated; fluid separation machines; gravel, stone, and dirt sorting and screening machines; soil screening machines; machines for separating target materials from mixtures of materials; steam and oil separating machines for chemical processing; oil-water separators for pneumatic controls being part of machines; filters for mining machines; grain separating machines; pressure regulators being parts of machines featuring drums; all of the foregoing for use in processing tailings in the mining industry and not for laboratory use Process equipment for liquid-solid separation, namely, separators for the cleaning and purification of liquids; apparatus for the treatment of solids settled from liquids, namely, metal cylindrical chamber and screen for use in filtering and removing settleable solids from liquid; all for use in in processing tailings in the mining industry and not for laboratory use
(1) Machines for filtering dust namely filter presses, disk filters, rotary pressure drum filters; machines for filtering fumes from air; drum filters for mining machines; air filters for motors and engines; dust filters being parts of vacuum machines; centrifugal pumps; decanter centrifuges incorporating screw conveyors; industrial centrifugal decanting machines; drainage machines namely, drain jetters; centrifugal drums; hand cranked spin driers, not heated; fluid separation machines namely thickeners; gravel, stone, and dirt sorting and screening machines; soil screening machines; machines for separating target materials from mixtures of materials; steam/oil separators; oil-water separators for pneumatic controls being part of machines; filters for mining machines; ore separators (machines); grain separators; pressure regulators being parts of machines featuring drums
(2) Process equipment for liquid-solid separation, namely, separators for the cleaning and purification of liquids; apparatus for the treatment of solids settled from liquids, namely, metal cylindrical chamber and screen for use in filtering and removing settleable solids from liquid
Filters for industrial purposes; apparatus (machines) for filtering water; process equipment for liquid-solid separation, including clarifier-thickeners; apparatus for the treatment of solids settled from liquids including sedimentation apparatus such as clarifiers or thickeners.
This disclosure relates to a hydraulic pump system for handling a slurry medium comprising at least two reciprocating positive displacement pumps, both pumps being arranged for alternating intake of slurry medium via a suction inlet and discharge of slurry medium via a discharge outlet, and piston/cylinder discharge valves for alternating closing and opening each discharge outlet. In a first aspect, a hydraulic pump system for handling a slurry medium, comprising at least two reciprocating positive displacement pumps, both pumps being arranged for alternating intake of slurry medium via a suction inlet and discharge of slurry medium via a discharge outlet, and piston/cylinder discharge valves for alternating closing and opening each discharge outlet, as well as control means for controlling the alternate closing and opening of both piston/cylinder discharge valves, such that during operation no volume difference occurs in the discharge of slurry medium is disclosed. In another aspect the control means comprise a lever assembly interconnecting the pistons of both piston/cylinder driven valves.
F04B 49/22 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by means of valves
F04B 23/06 - Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
This disclosure relates to a hydraulic pump system for handling a slurry medium at least comprising at least two reciprocating positive displacement pumps, both pumps being arranged for alternating intake of slurry medium via a suction inlet and discharge of slurry medium via a discharge outlet, and piston/cylinder discharge valves for alternating closing and opening each discharge outlet. In a first aspect, embodiments are disclosed of a hydraulic pump system for handling a slurry medium, comprising at least two reciprocating positive displacement pumps, both pumps being arranged for alternating intake of slurry medium via a suction inlet and discharge of slurry medium via a discharge outlet, and piston/cylinder discharge valves for alternating closing and opening each discharge outlet, as well as control means for controlling the alternate closing and opening of both piston/cylinder discharge valves, such that during operation no volume difference occurs in the discharge of slurry medium. In another aspect of the hydraulic pump system said control means comprise a lever assembly interconnecting the pistons of both piston/cylinder driven valves.
F04B 9/117 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
The present invention discloses a pump system using multiple reciprocating positive displacement pumps which phase shift is controlled by a phase shift controller. The phase shift controller uses a virtual master pump inside the phase shift controller which is used as a phase reference against which the phase shifts of the individual pumps is calculated. The phase shift controller adjusts the speed reference set-point for the variable speed drives of the individual pumps such that a desired phase shift is obtained and maintained. The operation op multiple reciprocating pumps using phase shift control can significantly reduce the pressure pulsation levels in the pump system. The use of a virtual master pump eliminates master slave scheduling and increases system reliability and availability as is the operating of the phase control is not depending on the reliability of a real master pump as is the case in prior art phase shift controllers.
F04B 11/00 - Equalisation of pulses, e.g. by use of air vesselsCounteracting cavitation
F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
39.
PUMP SYSTEM FOR CONVEYING A FIRST FLUID USING A SECOND FLUID
The invention relates to a pump system for conveying a first fluid using a second fluid, said system comprising at least a first pump, said first pump comprising at least a first rigid outer casing defining a first interior space, a first flexible tube structure accommodated in the first interior space, wherein the interior of the first flexible tube structure is arranged for receiving one of said first or second fluids, wherein the region of the first interior space surrounding the first flexible tube structure is arranged for receiving said other of said first and second fluids, and wherein the first flexible tube structure is movable between laterally expanded and collapsed conditions for varying the volume of the interior of the first flexible tube structure, thereby imparting sequential discharge and intake strokes on said first fluid.
A positive displacement pump apparatus (10) is disclosed for displacing a pumping fluid. The apparatus comprises one or more pump chambers (22) arranged in a pipe system for receiving the pumping fluid, the pipe system having at least one inlet (21') which can be shut off by means of a valve (24'), and at least one outlet (21') which can be shut off by means of a valve (24'). The one or more pump chambers 22 are connected via at least one intermediate fluid chamber (13') with at least one displacement element in the form of a piston head (14) and a piston rod (15), which is arranged to alternately carry out a suction stroke and a displacement stroke during its movement so as to displace fluid in the intermediate fluid chamber (13'), which thereby increases and reduces, respectively, the volume of the pump chamber (22). At least one flexible separating element in the form of a diaphragm (23) is provided at the pump chamber (22) to separate the fluid in the intermediate fluid chamber (13') from the pumping fluid. Furthermore, a force means is provided for applying force or energy to a side of said at least one piston head (14) at least during the displacement stroke, in such a manner that said force or energy counteracts the force exerted on the piston head (14) by the fluid in the intermediate fluid chamber (13'), which can thereby reduce the overall force needed to carry out the displacement stroke movement of the piston head (14) and a piston rod (15).
The invention relates to a device for damping discharge pulsations in a medium being pumped through a system of pipes in a pulsating manner by a displacement pump that operates with a specific discharge characteristic, which device at least comprises a housing with an at least partially gas-filled damping chamber having a certain volume present therein, which housing can be connected to the system of pipes, in such a manner that an interface layer is present between the medium and the gas in the damping chamber during operation, which damping chamber has a desired gas pressure characteristic that partially depends on the discharge characteristic of the displacement pump, wherein the gas volume that is present in the damping chamber varies in time between a minimum compression volume and a maximum expansion volume under the influence of said discharge pulsations during operation, as well as adjusting means that supply gas to or discharge gas from the damping chamber. The present invention provides a simpler and less complicated construction both for pulsation dampers provided with a separating element and for air boxes not provided with a separating element. In order to achieve an optimised damping of the discharge pulsations, the adjusting means are according to the invention arranged for determining the desired gas pressure characteristic in the damping chamber on the basis of the discharge characteristic of the displacement pump and determining the current gas pressure characteristic in the damping chamber, and comparing the current gas pressure characteristic as determined with the desired gas pressure characteristic of the damping chamber and determining the current position of the interface layer in the damping chamber on the basis of said comparison.
Pumps, and parts and fittings therefore; pumping systems;
control mechanisms for pumps; hydraulic controls for pumps;
pump diaphragms; pumps included in this class for use in
mining operations and mining equipment.
