8391 results about "Check valve" patented technology

An automotive emergency start power supply with an inflation function includes: an inflation pump, an internal power supply, and a first circuit board. The inflation pump is provided with a first power device, a detection assembly, and a first check valve; the first power device includes a first driving assembly and a first inflation assembly including a first transmission assembly, first cylinder assembly and connecting pipe; the first driving assembly is configured to provide power to the first inflation assembly, and the first inflation assembly is configured to provide first airflow to the first air outlet portion; the detection assembly is configured to detect air pressure information; and the first check valve is disposed in a first accommodating space formed by the first cylinder assembly and the connecting pipe, and is configured to allow the first power device to provide the first airflow to the first air outlet portion.

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

A rotating check valve is disclosed for improved debris collection within a wellbore. The check valve can be part of a debris removal tool that includes a motor, pump, gearbox, bailer, milling bit, the check valve, rotational shafts. On its uphole end, the check valve can be coupled with the bailer such that the check valve can rotate relative to the bailer. Also on the uphole end, the check valve can be rotationally coupled to a shaft that passes through the bailer and couples with the gearbox. On the downhole end, the check valve can be rotationally coupled to the milling bit. The check valve can include a torque transfer mechanism that transfers torque generated by the motor and gearbox to the milling bit. The check valve can include a unidirectional flow control mechanism that restricts the flow of fluid and debris to the uphole direction.

A fail-safe sealing system for a watercraft includes a self-bailing drain plug having an outer wall with a proximal end having a proximal opening, a distal end having a distal opening, and a fluid conduit that extends from the proximal opening to the distal opening. The sealing system includes a check valve including a ball disposed within the fluid conduit and being surrounded by the outer wall, and a ball retaining pin extending between opposite lateral sides of the outer wall adjacent the proximal opening for preventing the ball from passing through the proximal opening. The sealing system includes a sealing cap having a bayonet-style locking assembly that locks onto the ball retaining pin for securing the sealing cap to the proximal end of the outer wall for forming a water-tight seal with the proximal end of the outer wall of the self-bailing drain plug.

The invention provides a liquid pumping apparatus, system and method for increasing the flow of fluid in a gravity feed network. The invention provides an in-line main pipe with upstream and downstream portions flanking a manifold that houses a check valve. One or more branch pipes may form a fluid bypass around the manifold. Each branch pipe includes a pump configured to accelerate the fluid in at least partially the same direction as the downstream flow. A sensor may be adapted to measure a parameter related to the liquid level in the main pipe. A rotary encoder may be adapted to measure the flow rate in the main pipe as a proportional function of the check valve angle, under gravity flow conditions. A control system may energize the pumps when the liquid level in the main pipe is above a predetermined threshold according to the parameter.

The invention discloses a same-well water injection gas production system and process, and belongs to the technical field of oil and gas collection. The system comprises an injection-production pipe column system arranged in an underground well, and an underground pump arranged in the injection-production pipe column system and used for providing power for water injection and gas production in the underground well; the power liquid circulation system is arranged on the ground, communicates with the injection-production pipe column system and is used for providing lifting power for operation of the underground pump; the device comprises an injection-production string system, a gas-liquid separator, a packer, a one-way valve and an exhaust pipe, the packer separates an injection layer and a production layer of an underground well, the gas-liquid separator carries out gas-liquid separation on fluid of the production layer, the one-way valve is used for preventing liquid of the injection layer from entering the production layer, and the exhaust pipe is communicated with the injection-production string system; the device is mainly used for water injection gas production in the same well, the problems of invalid circulation and large energy waste due to the fact that drainage gas production water is lifted to the ground and then injected into the stratum are solved, natural gas originally exploited in uneconomic reservoirs can be exploited, and the economic service life of gas field exploitation is prolonged.

A hydraulic circuit is disclosed which includes one or more i) linear; or ii) rotary hydraulic actuator, wherein total number of cylinder chambers is N, M pressure rails, a valve arrangement, including M hydraulic rail ports each coupled to a pressure rail, N hydraulic chamber ports each coupled to a chamber of one or more actuators, N proportional valves each corresponding to one of the N hydraulic chamber ports, X sets of on-off valves and check valves coupling two or more hydraulic rail ports to each of supply sides of each of the N proportional valves, and Y sets of on-off valves and check valves coupling two or more hydraulic rail ports to each of return sides of each of the N proportional valves, and a controller configured to in real-time operate the N proportional valves and the associated on-off valves to achieve one or more desired functional parameters.

An improved heat pump including an integrated system for the management of refrigerant charge is provided. The integrated system actively adjusts charge allocation and thereby optimizes operational efficiencies in all modes of operation. In one embodiment, the integrated system includes three four-way valves, two expansion valves, two one-way check valves, and a suction line accumulator to optimize charge allocation. The four-way valves dictate the mode switch and refrigerant flow directions, and the expansion valves automatically allocate refrigerant mass in active components and store excess charge in an idle heat exchanger and suction line accumulator by controlling the compressor discharge pressure (equivalent to controlling condenser subcooling degree) as a function of the entering air and water temperatures. The integrated system provides seven working modes and is uniquely suited for spacing cooling, spacing heating, and water heating in both residential and commercial applications.

An assembly includes a plurality of fluid bladders including at least a first fluid bladder and a second fluid bladder, and a fluid manifold in fluid communication with the plurality of bladders. The fluid manifold includes at least a first passage and a second passage. A first port fluidly connects the first fluid bladder to the first passage, a second port fluidly connects the second fluid bladder to the first passage, and a third port fluidly connects the second fluid bladder to the second passage. A first check valve is positioned in the second passage and is moveable between a first position, where fluid enters the third port and inflates the second fluid bladder, and a second position where fluid is directed through the third port to a vent.

The invention relates to the technical field of bearings, and provides a hydrostatic bearing gas supply system which comprises a first gas supply subsystem and a second gas supply subsystem, the first gas supply subsystem comprises a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism and a degassing structure, and the first reaction mechanism, the second reaction mechanism and the first pipeline are sequentially connected; a reactant is arranged in the first reaction mechanism, a catalyst is arranged in the second reaction mechanism, and the first check valve and the degassing structure are arranged on the first pipeline; the second gas supply subsystem is connected with the first pipeline; when the gas source is cut off, the reactant and the catalyst are subjected to chemical reaction in the second reaction mechanism to generate water vapor and oxygen, the degassing structure is used for consuming the oxygen and generating superheated steam, and the superheated steam enters the hydrostatic bearing. The air supply system for the hydrostatic bearing provides the pure water vapor working medium for the hydrostatic bearing, so that the normal operation of the hydrostatic bearing is ensured, and the hydrostatic bearing is prevented from being damaged.

A fuel injector is capable of injecting a plurality of different fuels in a single fuel injection event, the fuel injector including: a nozzle at an end of the fuel injector, the nozzle having a tip, openings in the tip of the nozzle through which fuel is configured to be injected, and a check valve member with a tip located within the nozzle, the check valve member being movable between an injection position in which fuel is injected via the openings and a closed position in which the openings are closed. The fuel injector further includes a primary fuel path within the fuel injector, a pilot fuel path within the fuel injector, and a mixing volume connecting the primary fuel path and the pilot fuel path when the check valve member is in the closed position.

A milling bit valve is disclosed for improved debris collection within a wellbore. The check valve can be part of a debris removal tool that includes a motor, pump, gearbox, bailer, milling bit, check valve, and rotational shafts. In an example, on its uphole end, the milling bit can be coupled with the check valve. On its downhole end, the milling bit can be configured for debris removal with cutting edges. The downhole end can also include openings that provide access to an internal cavity of the milling bit. The internal cavity can extend the entire length of the milling bit. This allows the pump to pull drilling fluid into the bailers through the milling bit and check valve. As a result, the debris removal tool can simultaneously remove obstructions in a wellbore and collect debris from the obstruction removal.

Embodiments of a manifold of a hydraulic fracturing system include a junction having an inlet flow bore. The junction can include an integrated flow junction and valve check assembly having a body including a central portion and one or more side portions. The central portion can be positioned between a pair of manifold sections of the manifold and attached thereto. The one or more side portions extend radially from the central portion and include an inlet bore through which a pressurized fluid is received and supplied to the manifold. One or more check valves is positioned along the inlet bore so as to be integrated within the body of the junction.

A water flosser with a unidirectional sealing device includes a shell and a second check valve. A water storage chamber and a liquid outlet communicated to the water storage chamber are provided inside the shell. The liquid outlet is arranged at a bottom of the water storage chamber. The shell downwards extends along an edge of the liquid outlet to form a first abutment block. A protruding second abutment block is arranged in the shell; the second abutment block is arranged towards the first abutment block. The second check valve is provided with an abutment board. The first abutment block abuts against an upper surface of the abutment board. The second abutment block abuts against a lower surface of the abutment board, to limit the second check valve between the first abutment block and the second abutment block.

The invention discloses a reverse anti-blocking check valve, and relates to the technical field of valve bodies, the reverse anti-blocking check valve comprises a check valve body, and an expansion part is arranged on the surface of a valve plate, facing the fluid direction, of the check valve body; the expansion component comprises a bearing column fixed to the center axis of the surface of the valve plate, and a limiting ring is fixed to the axial top end of the bearing column. The expansion part is arranged on the incident flow side of the valve plate, the dynamic response function in the valve opening and closing process is achieved, when fluid is impacted in the forward direction, the expansion part is unfolded under the fluid pressure effect, the contact arc plate is automatically attached to the inner wall of a pipeline, an auxiliary sealing ring is formed, and the sealing performance is effectively improved; when the fluid pressure is weakened, the expansion component retracts by means of the spring, so that the contact arc plate is separated from the inner wall of the pipeline and generates relative motion, the cleaning effect similar to that of a scraper is achieved, dirt attached to the pipe wall and the surface of a key structure can be effectively peeled off, and the self-cleaning capacity and the anti-blocking effect of the valve are improved.

The invention relates to the technical field of hydrogen storage system testing, and discloses a one-way valve combined hydrogen storage system durability test bench and a test method. A main control computer of the rack is used for configuring test task parameters, coordinating operation of subsystems and processing test data; the high-pressure hydrogen supply subsystem comprises a pressure-adjustable hydrogen source and a pressure closed-loop control module, and can apply accurate and controllable hydrogen pressure to the inlet end of the tested system according to test task parameters; the multi-channel valve state acquisition subsystem acquires the inlet and outlet pressure of the valve, the surface temperature of the valve body and vibration spectrum data in real time through pressure, temperature and vibration sensor arrays arranged at the valves, and transmits the data to the main control computer; the valve action driving subsystem comprises a high-speed electromagnetic actuator array and a displacement feedback module and can drive all valves to execute a preset opening degree sequence and opening and closing frequency. And the durability evaluation subsystem is embedded into the main control computer, calculates the accumulated damage degree of the valve and predicts the residual life cycle.

The invention belongs to the field of hydrogen filling, and relates to an automatic hydrogen filling system for a hydrogenation mother station, which comprises a hydrogen purification device, a plurality of hydrogen compressors, a plurality of filling main pipes, a plurality of branch pipelines, a plurality of emptying pipelines, a plurality of filling hoses and a control system, an outlet of each hydrogen compressor is connected with a compressor outlet pressure gauge and a check valve, each branch pipeline is provided with a branch stop valve, and each emptying pipeline is provided with an emptying adjusting valve. And the control system is in signal connection with the compressor outlet pressure gauge, the branch stop valve, the emptying regulating valve and a long pipe vehicle pressure gauge arranged on the long pipe vehicle, and is used for automatically executing the actions of boosting, depressurizing, filling and stopping filling according to the pressure difference. Compressor pressure, filling header pipe pressure and long pipe vehicle pressure cooperate with one another, full automation and full flow of filling boosting and depressurization are achieved, and the working efficiency is improved.

Disclosed is a hydraulic control system for safe rapid opening or closing of a valve. The hydraulic control system comprises a hydraulic cylinder (71), a pressure oil line (141), an oil return line (151), an oil drain line (161), a quick oil return line (171) and a valve manifold (181), wherein the inside of the valve manifold is provided with a three-position four-way directional control valve (51), a bidirectional hydraulic lock (31), a first two-position four-way directional control valve (61) and an energy accumulator (191); a first cartridge valve (101) is connected between the oil drain line and a rod cavity of the hydraulic cylinder, and a pilot port of the first cartridge valve is connected to a port A of the first two-position four-way valve; an oil inlet of the energy accumulator is connected to each of the pressure oil line and the oil return line, a first check valve (81) is connected between the oil inlet of the energy accumulator and the pressure oil line, and a second cartridge valve (102) is connected between the first check valve and the energy accumulator; and the second cartridge valve is connected to a rodless cavity of the hydraulic cylinder, and a pilot port of the second cartridge valve is connected to the port A of the first two-position four-way directional control valve. The hydraulic control system for safe rapid opening or closing of a valve allows for safe rapid opening or closing of a valve.

An apparatus for controlling or metering a viscoelastic material for eye surgery. Such an apparatus may generally comprise a housing having a cylinder; a plunger having at least a portion operable to move within the cylinder; a reservoir; an inlet check; and an outlet check valve fluidly coupled to the reservoir. The inlet check valve may be configured to allow the viscoelastic material into the reservoir at a priming pressure. An actuator can be coupled to the plunger and configured to move the plunger in a first direction to increase the pressure in the reservoir to a delivery pressure that is sufficient to close the inlet check valve and open the outlet check valve. A return spring can be configured to move the plunger in a second direction to decrease the pressure in the reservoir.

The utility model relates to a liquid hydrogen storage tank with a vaporizer. Comprising an inner shell used for containing liquid hydrogen; the pressurizing unit comprises a pressurizing pipeline, and a pressurizing valve, a pressurizer and a pressurizing and pressure regulating valve which are sequentially arranged on the pressurizing pipeline in the medium flowing direction; one end of the pressurizing pipeline is connected with the bottom end of the inner shell, and the other end is communicated with the gas-phase space of the inner shell; the pressurizing unit is used for maintaining the pressure of the inner shell at a first pressure; the air supply unit comprises an air supply pipeline, and an air supply valve, a vaporizer, a pressure reducing valve and a check valve which are sequentially arranged on the air supply pipeline in the medium flowing direction; one end of the gas supply pipeline is connected with the bottom end of the inner shell, and the other end is connected with external gas utilization equipment; the vaporizer is used for converting liquid hydrogen into hydrogen, and the pressure reducing valve is used for reducing the pressure of the gasified hydrogen to the pressure required by gas equipment; and the exhaust unit is communicated with the gas phase space of the inner shell and is used for exhausting the overpressure gas. According to the storage tank, gas supply parameters can be changed according to gas use requirements of users, and the applicability is high.

A check valve assembly can include a housing including an inlet port, an outlet port, and a flow chamber defined by the housing and fluidly coupling the inlet port to the outlet port, an actuation chamber, and a piston assembly movable between a closed position and an open position. The piston assembly can include a poppet positioned in the flow chamber and can be configured to sealingly engage the housing in the closed position to fluidly separate the inlet port from the outlet port, and a flange positioned in the actuation chamber. The flange can contain a sealing member positioned between the flange and the housing to fluidly separate a forward actuation chamber from a rearward actuation chamber. A shaft can extend between the poppet and the flange. A biasing member can be operably coupled to the piston assembly wherein the biasing member biases the poppet assembly closed.

The invention relates to the field of nuclear power reactor core water replenishing tank outlet check valve welding, in particular to a welding alignment tool for a reactor core water replenishing tank outlet check valve and a welding method. The tool comprises a rack, two pipeline fixing frames and a valve body supporting and adjusting frame, the rack provides a fixing foundation for other parts, the valve body supporting and adjusting frame is arranged in the center of the rack, and the two pipeline fixing frames are arranged at the two ends of the rack; the valve body supporting and adjusting frame is used for supporting and adjusting the horizontal position and the vertical height of a check valve body, and the pipeline fixing frame is used for supporting and fixing a check valve butt joint pipeline. The valve body supporting and adjusting frame is used for supporting and adjusting the horizontal position and the vertical height of the valve, the worm gear lifting machine and the guide column are installed in the support to achieve adjustment and locking of any height, the horizontal position adjusting mechanism freely slides through the linear guide rail and the sliding block, and then rapid centering of the CMT outlet check valve and the butt joint pipeline welding seam lip edge is achieved. The labor intensity of personnel can be reduced and the working efficiency is effectively improved.

The invention belongs to the technical field of dampers, and particularly provides a shock-absorbing damper for a high-rise building, which comprises supports fixedly mounted on an upper boss and a lower boss, a damper body is hinged between the two supports, a spiral pipe is arranged on the outer side of the damper body, one support is connected with a sleeve, and the other support is connected with a spring. An air outlet one-way valve and an air inlet one-way valve are arranged on the sleeve, the air outlet one-way valve is connected with a pressurizing box through a hose, a conveying pipe is arranged in the pressurizing box, and the conveying pipe is communicated with an inlet of the spiral pipe through a hose. In the reciprocating motion process of the damper body, the sleeve and the inflating piston rod are matched to pressurize the pressurizing box, cooling liquid in the pressurizing box is pressed into the spiral pipe, heat of the damper body is taken away, the temperature of the damper body is kept within a proper range, and the situation that the energy dissipation capacity of the damper body is affected by too high temperature is avoided; the problem that in the prior art, the energy dissipation capacity of a damper is weakened due to high temperature is solved.

The invention provides a fixed scroll plate with an exhaust non-return function, a pump body assembly and a scroll compressor, and belongs to the technical field of compressors. According to the scroll compressor, the buffering structure is arranged, the impact force generated when the check valve plate moves downwards is relieved, abrasion and impact of the check valve plate can be effectively reduced, and therefore the durability of the check valve plate and the reliability of the whole scroll compressor are improved. Due to the buffer structure, the hard contact of the check valve plate during up-and-down movement is reduced, so that the noise generated by collision is reduced, and the operation environment of the scroll compressor is improved. The check valve plate can automatically open or close the exhaust hole according to the pressure change of the refrigerant, it is ensured that the high-pressure refrigerant can be smoothly exhausted during exhausting, the refrigerant can be prevented from flowing reversely when exhausting is stopped, and the exhaust efficiency and the overall performance of the compressor can be improved. The effective exhaust non-return function can prevent unnecessary leakage of refrigerants, energy loss is reduced, and therefore the energy efficiency of the whole system is improved.

The present invention relates to a check valve, in particular of a hydrogenation installation, having an inlet and an outlet which define a flow direction which extends from the inlet to the outlet. The check valve has a piston (6) movably arranged relative to the inlet and the outlet to open and close the inlet of the check valve, where the piston (6) defines a piston axis (63) by means of a first end facing the inlet and a second end facing the outlet. The piston (6) has an outer surface along which a fluid flowing through the check valve in a flow direction flows. The outlet has outlet channels (35) in order to enable the fluid to flow outward from the check valve, all outlet channels (35) of the outlet running obliquely with respect to the piston axis (63). The check valve can be used for high pressure and allows soft closing even in the event of a reversal of the pressure action. The check valve is used in particular in hydrogen refueling stations.

A ratcheting setting tool can use wellbore fluid to inflate expandable seals positioned downhole in a wellbore. For example, the ratcheting setting tool can include a piston within a first chamber. The piston can move from a first position to a second position in the first chamber when a pressure is applied to the piston. The ratcheting setting tool can include a first check valve in a second chamber. The first check valve can transmit wellbore fluid from the wellbore into the second chamber. The ratcheting setting tool can include a second check valve. The second check valve can transmit the wellbore fluid in the second chamber into an inflatable valve when the piston moves from the first position to the second position. In some examples, the ratcheting setting tool may be a hydraulic ratchet.

The invention relates to a gas injection device of a foaming injection molding machine, and belongs to the technical field of injection molding machines. The gas injection device comprises a gas source; a pressure reducing valve; an air inlet one-way valve; injecting air cylinders; a gas injection piston; the connecting rod mechanism is used for connecting the gas injection piston and the injection screw rod; the gas injection head is communicated with the gas storage chamber and the injection charging barrel; the gas injection one-way valve is located between the gas injection head and the gas injection cylinder, and gas in the gas storage chamber enters the injection charging barrel in a one-way mode through the gas injection one-way valve; and when the injection screw retreats in a pre-plasticized mode, the gas injection piston is driven by the connecting rod mechanism to slide in the gas injection cylinder, the volume of the gas storage chamber is compressed, after the gas pressure rises to exceed the melt pressure, the gas injection head is opened, and inert gas enters the injection charging barrel through the gas injection head. The gas injection system is simplified, the gas injection flow and pre-plasticizing of the injection screw are synchronously carried out, and the manufacturing cost of equipment is reduced.

The invention discloses a check valve device adopting a dynamic pressure detection and compensation algorithm, and relates to the technical field of automatic control. The device comprises a valve, a pressure sensor group and a control part, the pressure sensor group comprises two pressure sensors which are respectively arranged at the upstream and the downstream of the valve and are used for continuously acquiring instantaneous pressure data; the control part is used for calculating the instantaneous pressure difference inside and outside the valve according to the obtained instantaneous pressure data, and performing nonlinear correction on the reference opening degree by using a correction factor to obtain the final command opening degree; the method comprises the following steps: constructing a kinetic equation of a valve core to represent an actual valve opening constraint under torque-free control; and torque control is conducted according to the deviation between the final command opening degree and the actual valve opening degree. The opening degree can be adjusted in real time to respond to the complex fluid environment, and the dynamic response performance, the energy utilization efficiency and the adaptability to complex working conditions are remarkably improved.

The invention discloses a constant flow metering pump which comprises a cam box, a pump head and a confluence block, a driving mechanism, a cam mechanism and at least two connecting rod mechanisms are arranged in the cam box, and the output end of the driving mechanism drives the cam mechanism to rotate, so that the cam mechanism drives all the connecting rod mechanisms to reciprocate at phase differences; the pump head is provided with cavities in one-to-one correspondence with the connecting rod mechanisms, the cavities are connected with pistons in a sliding mode, the pistons are connected with the connecting rod mechanisms, and when the driving mechanism drives the cam mechanism to rotate by one circle, the pistons alternately suck liquid and discharge liquid; the confluence block is provided with a liquid inlet channel and a liquid outlet channel, all the cavities are communicated with the liquid inlet channel and provided with liquid inlet one-way valves respectively, and all the cavities are communicated with the liquid outlet channel and provided with liquid outlet one-way valves respectively. The technical problems that in the prior art, the pulsation phenomenon occurs in filling, and the filling efficiency is too low can be solved.

The utility model discloses a cutting machine for flue check valve production, which comprises a base, a cutting mechanism, a clamping mechanism and a pipe supporting mechanism, the clamping mechanism and the pipe supporting mechanism are both arranged on the base, the cutting mechanism comprises an X-direction moving module, a Z-direction moving module, a mounting seat and a laser cutting machine head, a stand column is arranged on the base, and the Z-direction moving module is arranged on the stand column. The X-direction moving module is fixed to the stand column, the Z-direction moving module is fixed to a moving part of the X-direction moving module, the mounting base is fixed to a moving part of the Z-direction moving module, the laser cutting machine head is fixed to the mounting base, the clamping mechanism comprises a rotary disc, an inner side jacking assembly and an outer side clamping assembly, a fixing frame is arranged on the rotary disc, and the clamping mechanism is fixed to the outer side clamping assembly. And a rotating shaft is arranged on the fixing frame. The utility model relates to the technical field of cutting machines, in particular to a cutting machine for flue check valve production, which is convenient for clamping pipes, can meet the clamping requirements of pipes with different sizes and is not easy to deform the pipes.