33results about "Equalizing valves" patented technology

An exemplary device and method for microfluidic transport is disclosed as providing inter alia a passive check valve (100), a fluid inlet channel (210), a fluid outlet channel (220) and a pumping cavity (240). The fluid inlet channel (210) is generally configured to flow a fluid through the check valve (100). The check valve (100) generally provides substantially passive means for preventing or otherwise decreasing the incidence of purged outlet fluid re-entering either the pumping cavity (240) or the fluid inlet channel (210). Accordingly, the reduction of backflow generally tends to enhance overall pumping performance and efficiency. Disclosed features and specifications may be variously controlled, adapted or otherwise optionally modified to improve micropump operation in any microfluidic application. Exemplary embodiments of the present invention representatively provide for substantially self-priming micropumps that may be readily integrated with, for example, existing portable ceramic technologies for the improvement of device package form factors, weights and other manufacturing and/or device performance metrics.

A fluid filter includes a housing having a tapping plate with a first aperture. A center tube is arranged in the housing proximate to the tapping plate. The center tube includes a second aperture. An elastomeric valve assembly is arranged between the center tube and the tapping plate. The valve assembly comprises a separate two-piece relief valve and anti-drain back valve. The anti-drain back valve is arranged adjacent to the first aperture for selectively blocking the first aperture to prevent fluid from exiting in the side of the filter during engine shut down. The relief valve is arranged adjacent to the second aperture for selectively blocking the second aperture to permit fluid to flow past the relief valve during high differential pressure conditions such as cold starts and plugged filter conditions.

An interior-mountable pressure relief valve for packages containing food products such as coffee that normally tend to out-gas. The relief valve of the present invention can be made by thermoforming a pocket of a barrier type of semi-rigid film that has a heat seal membrane on one side. An indent can be made in the bottom of this pocket to receive a filter medium that covers an aperture in the bottom of the pocket. The filter medium can be heat-staked to the pocket. A pressure relief valve known in the art containing a base layer, a pair of rails and a flexible membrane can be placed in the pocket. This valve and pocket assembly can be can be treated with a mesh membrane that is heat sealable to the seal side to prevent disassembly or contamination. The product can then be wound on a level wound spool for shipping to an end user. The end user can take the carrier tape and dispense it into a single piece dose and then heat seal the carrier to the inside wall of the package.

The invention relates to a multi-functional constant flow control valve used for flow adjustment and automatic control. The multi-functional constant flow control valve includes a valve body which is provided with a valve cover at the upper portion and a sewage draining exit at the lower portion. The valve cover is provided with a valve shaft at the center. The valve shaft is provided with an adjusting valve clack at the lower portion. A valve pocket, a differential pressure receptor and a bi-seat valve clack with a function of compensating the differential pressure are arranged inside the valve body. The valve pocket, the differential pressure receptor and the bi-seat valve clack with the function of compensating the differential pressure constitute a valve core. Compared with the prior art, the multi-functional constant flow control valve is more reasonable and compact in structure, simple in disassemble and maintenance, visual in flow display, and abundant in function, thus being applicable to more fields.

The invention provides an ultrahigh-pressure hydrogen electromagnetic valve having a pressure relief function and applied to a vehicle. The ultrahigh-pressure hydrogen electromagnetic valve comprisesa valve body; the valve body is provided with a gas charging interface which is connected with a gas cylinder; the valve body is internally provided with a main gas charging channel and the gas charging interface; the valve body is also internally provided with a manual control valve interface, an electromagnetic valve interface and a pressure reducer interface; one side of the pressure reducer interface is provided with a low pressure output interface; a manual control valve is installed at the manual control valve interface; an electromagnetic valve is installed at the electromagnetic valveinterface; a pressure reducer is installed at the pressure reducer interface; the gas charging interface communicates with the main gas charging channel through the manual control valve; and the maingas charging channel communicates with the low pressure output interface through the manual control valve, the electromagnetic valve and the pressure reducer in sequence. The ultrahigh-pressure hydrogen electromagnetic valve provided by the invention has the advantages of reasonable structure, high integration level, good safety and long service life.

The invention discloses a pilot-operated type overflow valve with a pressure resisting function. The pilot-operated type overflow valve comprises an oil inlet, an oil outlet, a main valve seat, a main valve element, a damping hole, a valve body, a main valve spring, a valve deck, a remote control port, a pilot-operated valve seat, a pressure adjusting spring, an adjusting screw and a pressure adjusting hand wheel. The valve body is provided with the oil inlet. The oil outlet is formed in the lower end of the valve body. The main valve seat is arranged at the upper end of the oil outlet. The main valve element is arranged at the upper left end of the main valve seat. The main valve spring is arranged at the upper end of the main valve seat. The damping hole is formed in the upper right end of the main valve seat. The valve deck is arranged at the upper end of the valve body. The remote control port is formed in the upper end of the valve deck. The pressure adjusting hand wheel is arranged at the upper left end of the valve body. The adjusting screw is fixed to the right end of the pressure adjusting hand wheel. The pressure adjusting spring is arranged at the right end of the adjusting screw. The pilot-operated valve seat is arranged at the right end of the pressure adjusting spring. The pilot-operated type overflow valve has the beneficial effects that the damping effect is good, noise is low, the pressure adjusting range is wide, and actions are sensitive.

The present flow rate safety valve comprises a valve body, a valve seat, a valve core and a spring. The valve core is an open cylinder. A sealing washer is set up on the front end of the valve core. Part of the rim of the sealing washer contacts the inner wall of the valve body, forming a seal and guiding the valve core in the axial direction of the valve body. A projecting sealing part is arranged on the valve seat, and the inner wall at the rear end of the valve core is a conical surface which extends from the rear end face to the middle part of the valve core and forms a guide for the conical sealing part. Inside an outflow pipe of the valve body, a backflow preventer is arranged in order to prevent the medium backflow.

A device is composed of holder upper limb, knockout sheet O shaped ring, container flange and holder down limb. The holding force between holder and knockout sheet is controlled by elastic deformation size of O shaped ring to ensure knocked out to knockout sheet at the designed explosive pressure. The internal diameter of holder upper limb is in between internal and external diameters of O shaped ring, axial distance of explosive sheet and upper limb contact surface of holder is 2-10 mm, at normal operating state holder upper limb remains contact state with holder down limb and container flange to ensure elastic deformation size of O shaped ring.

The invention discloses a throttling device, which comprises a water pipe main body, a flow limiting block, a connecting rod, a flow limiting surface, a spring and an adjusting bolt. The two ends of the water pipe main body are respectively provided with an inlet connection end and an outlet connection end. The water pipe The outlet connection end of the main body is integrally formed with a flow-limiting surface, and a flow-limiting cavity is formed inside the flow-limiting surface. The cross-sectional area of ​​the flow-limiting cavity decreases linearly from the inlet connection end to the outlet connection end. The upper and lower ends are symmetrically provided with mounting holes, one end of the connecting rod is placed in the mounting hole, the other end of the connecting rod is fixedly installed on the current limiting block, the spring is placed in the mounting hole, and the adjusting bolt passes through the The threaded structure is installed on the outer end of the mounting hole, one end of the spring is fixedly connected with the connecting rod, and the other end of the spring is against the adjusting bolt. This equipment can be adjusted according to the water pressure of the flow, so that the water flow in the pipeline is always at a stable value, and the purpose of saving water is achieved.

The invention discloses a convenient faucet which comprises a water inlet pipe, a water outlet pipe, a valve spool, a valve seat, a valve stem and a push handle. The water outlet pipe is disposed vertically, the water inlet pipe is connected with the water outlet pipe through a water inlet connector, and the other end of the water inlet pipe is connected with a pressure reducing valve. The valve seat is mounted between the water inlet connector and the water outlet pipe. A limit sleeve is mounted at the upper end of the valve seat, a support used for supporting a rotating arm is mounted below the valve seat, and a sealing element is fixed on the support. The middle of the rotating arm is hinged to the support through a hinge shaft, the upper end and the lower end of the rotating arm are hinged to the valve stem and a connecting rod respectively, and the connecting rod penetrates the support and the sealing element to be hinged to the push handle. The faucet is closed and opened by means of applying thrust to the push handle or removing the thrust, the effect that the faucet can be closed automatically after a user uses the faucet and leaves is achieved, the faucet is convenient and fast to use, and waste on water resources is reduced.

The invention provides a pilot operated safety valve with independent gas source control. The pilot operated safety valve comprises a main valve and a pilot valve, wherein a buffer tank is located between the pilot valve and an independent gas source; a pressure sensor is located between the buffer tank and the pilot valve; the buffer tank and each of the pilot valve, the independent gas source and the pressure sensor are connected by a pipeline; a pressure reducing valve and a check valve are arranged on the pipeline, which is connected with the buffer tank and the independent gas source; the gas of the independent gas source enters the buffer tank through the pipeline; the gas of the buffer tank enters a lower cavity of the pilot valve from a valve shaft of the pilot valve through the pipeline. According to the pilot operated safety valve, as independent, stable, and clean gas source pressure is introduced into the pilot valve and a main valve gas chamber, the problem that a medium blocks an internal flow channel of the pilot valve is solved; the influence, caused by pressure fluctuation in the pipeline, on the valve performance is overcome; the application range of the pilot operated safety valve is expanded.

The invention discloses a safe pressure relieving and anti-creeping device for a water heater. The safe pressure relieving and anti-creeping device comprises a valve and a pipe. A water inlet channeland an outer pressure relieving channel are formed in the valve, and an inner relieving valve assembly used for balancing the pressure in the water heater is arranged in the water inlet channel. An outer relieving valve assembly used for water heater over-pressure protection is arranged in the outer pressure relieving channel. A water pipe plug matched with the pipe is arranged at the top end of the pipe, and the pipe and the water pipe plug are made of isolating materials. The main purposes of the safe pressure relieving and anti-creeping device are that the valve and the pipe are both made of the isolating materials, the isolating materials are isolated from electricity and meanwhile are low in heat conductivity coefficient, thus the anti-creeping safe protection function is achieved, amain structure is formed through a mold, the high heat resistance is also achieved in the aspect of the material characteristic, and the purposes of energy conservation and heat preservation are achieved. Meanwhile, the safe pressure relieving and anti-creeping device is provided with the inner relieving valve assembly and the outer relieving valve assembly, thus the safe pressure relieving function is achieved, the secondary pressure relieving effect can be achieved structurally, and thus practicability of pressure relieving is enhanced greatly.

The invention relates to the technical field of semiconductor manufacturing, and discloses a vacuum pressure adjusting device. The vacuum pressure adjusting device includes an outer cavity, an inner cavity is formed in the outer cavity, the inner cavity is fixedly connected with the outer cavity, limited communicating pipes are arranged at the bottom end of the inner cavity, and the limited communicating pipes are fixedly connected with the inner cavity. According to the vacuum pressure adjusting device, the limited communicating pipes which are of a tubular structure with bottom are directlyconnected with the inner cavity, the bottom parts are hollow, and the hollow parts are connected with an outer cavity; a cover plate is a circular thin plate, the cover can cover the hollow parts of the limited communicating pipes, and can move up and down freely; the falling cover plate covers the hollow parts of the limited communicating pipes, the inner cavity and the outer cavity are isolated(or minor leakage may exist ), and the state of the cover plate is related to the pressure difference between the inner cavity and the outer cavity, the hollow area of the limited communicating pipesand the weight of the cover plate; and when the pressure difference is large, the cover plate is pushed to rise, and when the pressure difference is small, the cover plate falls down, so that the internal and external pressure difference is kept constant without changing with the cavity pressure.

A re-closable valve (1, 100, 700, 800) for use in sterile fluid transfer has a body (5) with open entry and exit sides (2, 3) and a passageway (4) for fluid therebetween. The entry side is connectable to an opening of a separate vessel and the exit side is connectable to downstream processing. The entry side includes a first rupturable seal (5b, 500) blocking the opening of the entry side. A piston (9) is connected to an actuator (7) via a cam mechanism (8, 85, 10) which moves the piston (9) axially in the passageway (4) and to the first seal (5b, 500). On movement of the piston (9) during a first actuation, the first seal (5b, 500) is torn free from the entry side to open the valve for fluid transfer. A sharp rim (15) surrounds the opening of the entry side and a curved surface area (193) encircles the piston exterior proximal the entry side. The valve (1, 100, 700, 800) can be re-closed by moving the piston (9) during a subsequent actuation thus engaging the sharp rim (15) with the curved surface area (193) which plastically deform to from a second seal. Arrangements are included to enable the valve (1, 100, 700, 800) to be multiply re-opened and re-closed, if desired.

The invention provides a gas extinguishing agent container valve. An upper end opening of a valve body of the gas extinguishing agent container valve is communicated with a gas collecting pipe, a lower end opening of the valve body is connected with an extinguishing agent cylinder, and an inner sealing cap in the valve body is used for blocking off communication between the upper end opening and the lower end opening. A first piston is arranged in a start connector in the outer sidewall of the valve body, a first push rod is arranged on one side of the first piston and extends into a first through hole, and a blasting cartridge is arranged between the first piston and a pressing cap on the start connector. After being ignited, the blasting cartridge releases high-pressure gas to push the first piston and the first push rod to strike the inner sealing cap broken, then the extinguishing agent cylinder can be communicated with the gas collecting pipe to start an extinguisher to extinguish fire, and accordingly a start mode is safe and reliable. The valve body is provided with a pressure measuring connector and a pressure gauge seat connected with the pressure measuring connector, the pressure gauge seat can enable a pressure gauge to be communicated with the pressure measuring connector when the pressure gauge is connected into the pressure gauge seat, and the pressure gauge is automatically isolated from the pressure measuring connector when being demounted, so that to bleed the extinguishing agent cylinder when the pressure gauge is replaced is not needed.

The invention discloses a composite material for a balance valve which comprises the following components in part by weight: 19-32 parts of a TiAl/Al2O3 composite material, 15-30 parts of a VCp/Fe composite material, 45-60 parts of a Fe3Al/WS2 composite material, 10-20 parts of a Si3N4/Al composite material, 13-28 parts of a SiCp/MoSi2 composite material, 21-32 parts of a Mg2Si/Al composite material and 8-18 parts of Al-TiO2-B2O3. The composite material has the advantages of being good in stability performance and high in regulation precision, and the flow cannot change along with the pressure fluctuation of a system.

The invention provides a pressure-reducing pressure-stabilizing and constant-pressure starting valve for fire fighting. The pressure-reducing pressure-stabilizing and constant-pressure starting valvecomprises a valve body, a valve cover, a first valve cavity, a second valve cavity, a pressure reducing adjusting mechanism, a constant-pressure adjusting mechanism and a check valve element, whereinthe two ends of the valve body are detachably connected with the valve cover and a connecting seat respectively, the first valve cavity is formed by the valve cover and the valve body, the second valve cavity formed by the valve body and the connecting seat, the pressure reducing adjusting mechanism is arranged in the first valve cavity, the constant-pressure adjusting mechanism is arranged in thepressure reducing adjusting mechanism, and the check valve element is arranged in the cavity of the connecting seat. According to the pressure-reducing pressure-stabilizing and constant-pressure starting valve for fire fighting, the constant-pressure starting valve is arranged through the pressure reducing adjusting mechanism and the constant-pressure adjusting mechanism, the starting valve is opened slowly, and when the stable pressure is reached, the opening action is completed, and no instant overpressure explosion hazard is generated; the opening degree of an automatic adjusting valve element is kept constant in the pressure reduction process, and the output stability of a fire extinguishing medium is ensured; through the arrangement of the check valve element, the fire extinguishingmedium is prevented from flowing back into the starting valve, the sealing of the fire extinguishing medium is kept, and the storage is safe; and due to the arrangement of a low-leakage high-sealing valve, the starting valve is ensured not to act.

The invention belongs to the field of mechanical parts, and particularly relates to an automatic alarm room temperature on-off control valve. A control box is arranged in a control bin. A temperature sensor is arranged on the top inside the control box. A control circuit board is arranged below the temperature sensor. The temperature sensor is connected with the control circuit board. A signal receiver is welded to the control circuit board and sequentially penetrates through the control box and a valve body. A fixed contact, a movable contact, a motor and a cylinder are arranged below the control circuit board. The movable contact is connected with the control circuit board and the motor and is perpendicularly located above the fixed contact. The cylinder is connected with the motor. A piston of the cylinder is connected with a valve rod which is fixed to the upper surface of a valve element. A through hole is formed in the bottom of the control box. The valve rod is arranged in the through hole. A seal ring is arranged between the valve rod and the control box.

The invention discloses a mechanical drive control type flow regulating valve which comprises a pressure control cavity, a valve seat, a regulating system, a piston and a flow limiting plate, wherein the regulating system comprises a regulating seat, a screw plug and a rectangular spring, and the screw plug and the rectangular spring are arranged in the regulating seat; the piston is arranged in the pressure control cavity in a sliding mode, a flow limiting channel is formed in the valve seat, sliding ways are arranged on the two sides, which correspond to the flow limiting plate, of the valve seat, the flow limiting plate is arranged in the flow limiting channel in a sliding and penetrating mode, the two ends of the flow limiting plate are connected with the sliding ways in a sliding mode, the flow limiting plate is used for controlling the through-flow section area of the flow limiting channel, and a throttling opening is formed between an upper flange of the flow limiting plate and the valve seat; one end of the flow limiting plate extends into the pressure control cavity and is connected with the piston, and the other end of the flow limiting plate extends into the regulating seat and is connected with the screw plug through the rectangular spring; and the pressure control cavity is connected with an air source. The through-flow cross section area is regulated in real time, the flow passing through the valve body can be effectively regulated in time, and good practicability is achieved.

The invention discloses a composite flow valve with a composite material valve base, which comprises the valve base, a valve core, a valve core guide rod, a pressure springs, a fluid intake valve inlet and a flow discharge valve outlet, wherein the valve base consists of an external valve base shell and an internal liner body; the inside surface of the external valve base shell is lined with the internal liner body, and the external valve base shell and the internal liner body are tightly combined to form a composite material. The internal liner body with a certain thickness has a fluid contact surface; and the internal liner body of the valve base can be made of corresponding materials according to different use requirements on the composite flow valve. The external valve base shell of the valve base is made of a pressure resistant material and does not contact with the fluid directly; and the force applied on the internal liner body is transferred to the external valve base shell, so the overall mechanical property is reliable. The valve base of the composite flow valve with the integrated composite structure can meet pressure and flow rate requirements and requirements on high working temperature and the like, and has low cost.

The invention relates to a double-damping high-pressure back pressure valve without a diaphragm. The double-damping high-pressure back pressure valve comprises a main valve body, an auxiliary valve body, a main valve core, an auxiliary valve core, a pressure reducing cylinder, a valve core pressing plate, an auxiliary spring, a main spring and a main spring gland; the auxiliary valve body is arranged in the main valve body, the lower end of the pressure reducing cylinder is connected to the main valve body, the upper end is connected to the main spring gland, and the main valve core is arranged in the pressure reducing cylinder; and the lower end of the main valve core and the auxiliary valve body are sealed or separated to open and close a back pressure valve, the upper end of the main valve core is connected with the auxiliary valve core, the upper end of the auxiliary valve core is connected with the valve core pressing plate, the main spring is arranged between the valve core pressing plate and the main spring gland, and the auxiliary spring is arranged between the auxiliary valve core and the main valve core. Compared with the prior art, the double-damping high-pressure back pressure valve without the diaphragm is provided with the auxiliary spring providing damping in addition to the main spring providing spring back for the valve core. The auxiliary spring is used for absorbing and releasing part of the energy, so that the speed of opening and closing of the valve core can be eased, and the pulse generated by a pump in the valve body is smoother and the performance of the back pressure valve is improved significantly.

The invention discloses a high-pressure balance valve for a proportioning cabinet. The high-pressure balance valve comprises air inlet pipes, valve main bodies, glands and valve covers, wherein each air inlet pipe is arranged on the corresponding valve main body; a valve main body sealing ring is arranged in a groove of the corresponding valve main body; each valve main body is inserted into a hole of the corresponding valve cover and is fastened by a corresponding valve main body nut; each valve cover is pressed on the corresponding gland to form an air chamber; a valve seat is arranged in each valve main body; a valve spring and a valve core are arranged in each valve seat; a valve inner core is arranged in each valve core. The high-pressure balance valve provided by the invention has good use effect on pressure balance of high-pressure gas and high proportioning accuracy and pressure resistance up to 4MPa.

The invention discloses a load compensation balance valve. The problem that an existing balance valve of a gravity system is poor in speed regulation capacity in an actual use process is solved. The valve comprises a valve body and a valve core, wherein the valve body is provided with a first oil port and a second oil port, the two ends of the valve core are provided with a control cavity and a spring cavity, the valve core is provided with a first channel, The first channel communicates with the first oil port, and the valve core has a first state that isolates the first oil port from the second oil port and a second state that enables the first oil port to communicate with the second oil port. When the valve core is in the second state, pressure oil of the first oil port communicates with the spring cavity through the first channel and a first throttling port, and spring force of the spring cavity and pressure for picking up the pressure oil of the first oil port by the spring cavitycooperate with each other to mutually balance control force of the control cavity so as to control an opening of the valve core. The valve also has the advantages of simple structure, convenient assembly, reliable action, long service life and the like.

The invention relates to a pressure reducing valve. The pressure reducing valve comprises a valve body, a valve element, an upper bonnet, a cover plate, a regulating bolt, a regulating post, a regulating spring, a sealing cover and a sealing body, wherein the inner part of the valve body is provided with an upper valve chamber and a lower valve chamber; a control hole is formed between the upper valve chamber and the lower valve chamber; the two sides of the valve body are provided with a water inlet and a water outlet; the water inlet communicates with the upper valve chamber; the water outlet communicates with the lower valve chamber; the sealing cover and the sealing body are positioned on the upper end part of the valve body; the regulating spring is positioned in the upper bonnet; the sealing body is arranged in the upper valve chamber; the valve element comprises a guide post and a tapered plug; a water outlet pipeline is gradually thickened in a tapered manner, and a blocking ball and a filter element are sequentially arranged in the pipeline; the blocking ball is fixedly arranged in the pipeline through a spring; a sewage discharge pipeline is arranged on the pipeline between the blocking ball and the filter element; and a stop valve is arranged on the sewage discharge pipeline. The pressure reducing valve has a pressure reducing function, and can filter a flow-through fluid and can prevent the fluid from flowing back.

The invention discloses a high-sensitivity pressure-limiting air valve of a truck air pump and belongs to the field of automobile parts. A conical lower cover with a large opening facing upwards is installed on a pipe joint, a disc-shaped rubber pad is installed on the lower cover, a cylindrical plastic push rod is vertically installed in the center of the bottom of the rubber pad, and a spiral pressure spring is installed between the lower portion of the interior of the lower cover and the bottom of the rubber pad. A conical upper cover of which the edge with a large opening facing downwards is meshed with the upper part of the lower cover is arranged on the rubber pad, and an upper cover external thread is arranged at the top end of the upper cover; when the air pump enables the pressure of air filled into the air storage tank to reach the upper limit, the air storage tank inputs air pressure into the upper cover through an air return pipe, the air pressure pushes a rubber pad to move downwards to compress a pressure spring and pushes a plastic push rod downwards to abut against an air inlet valve piece of the air pump downwards, and the air inlet valve piece of the air pump cannot be closed; therefore, the air pump cannot normally inflate air.