11403 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.

The invention relates to the technical field of steam extraction check valves, and discloses a design method and device for quickly responding to a steam extraction check valve under a high-parameter working condition, and the method comprises the following steps: constructing a valve working condition database and a valve body database; based on the valve working condition database and the valve body database, a valve performance prediction model is constructed, and a valve state quantity prediction value is obtained through performance influence factors collected in real time; correcting the predicted value to obtain a valve state quantity corrected value; a valve control environment based on reinforcement learning is established, a valve optimization control strategy model is constructed, a real-time optimal control action is generated and executed based on a valve state quantity correction value, and efficient optimization control over the valve is achieved; according to the method, through combination of data-driven performance prediction and reinforcement learning optimization control, rapid response and efficient operation of the steam extraction check valve under the high-parameter working condition are achieved, and the reliability and the energy-saving effect of the system are improved.

A coolant system for an electric vehicle for circulating a liquid coolant, comprising a plurality of components through which the coolant can flow. The components can be connected to one another, at least in at least one subset, in a coolant-conducting manner via valves and via coolant lines. Only a single multi-way valve and a single non-return valve are arranged in such a way that one of the components and another of the components can be fluidically connected to one another only via a further component, designed as a coolant pump, and via a predetermined switching state of the multi-way valve to permit a flow through the multi-way valve and the non-return valve independently of the rest of the components. A thermal management system is also provided.

An adjustable additive cartridge that provides adjustable metering of additive to a base fluid as the base fluid is flowing through the cartridge. A spout is mounted for limited rotation within a base element of the cartridge. Rotation of the spout results in varying degrees of flow of additive into a base fluid flow path through the cartridge. The cartridge may be used with a portable beverage container, such as a sports bottle or off-the-shelf water bottle. The supply of base fluid in a container used with the cartridge may be kept in an unmixed, pure state, and other cartridges, each having different additives (i.e., flavors) may be used interchangeably with the same base fluid supply. The cartridge allows a consumer / user to experience different additives, such as different flavors or supplement compositions, for a given supply of base liquid in a single container. A check valve on the cartridge prevents backflow of the base fluid. An integrated filter for filtering base fluid flowing into the cartridge may be provided. The additive cartridge may be sealed to provide for extended storage and to provide a user / consumer with evidence of integrity, quality and / or tampering prior to purchase and / or use. Visual and tactile indicators of the amount of additive being added to a base fluid may be provided. A container may retain a spare additive adjustable cartridge on the container.

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.

The invention discloses a hydraulic system and equipment for testing a hydraulic valve, and belongs to the technical field of hydraulic systems. An oil inlet of the hydraulic pump is connected with the oil tank; the tested valve comprises a plurality of inlets and outlets; one oil way of an oil outlet of the hydraulic pump is connected with the pressure regulating oil way, and the other oil way is connected with an oil inlet of the cartridge check valve; the pressure adjusting oil way adjusts the oil outlet pressure of the hydraulic pump; one oil way inserted into the oil outlet of the one-way valve is connected with a control oil way; the control oil way is used for adjusting the on-off and pressure of control oil of the tested valve; the other oil way is connected with an oil inlet of a proportional speed regulating valve, an oil outlet of the proportional speed regulating valve is connected with an oil inlet of a plug-in mounting type direction valve group, an oil outlet of the plug-in mounting type direction valve group is connected with an inlet of a tested valve, and a control cavity of the plug-in mounting type direction valve group is connected with an electromagnetic directional valve; an outlet of the tested valve is connected with the hydraulic cylinder and the throttling oil way. The hydraulic valve testing device can be suitable for testing high-pressure environments of various types of hydraulic valves.

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.

A vibration damper (1), having a cylinder (3) in which a piston (7) on a piston rod (5) separates a working chamber on the piston rod side (13) from a working chamber remote from the piston rod (15), wherein both working chambers (13, 15) are connected, via fluid lines (23, 27) within a line block (19) connected to the cylinder (3), to at least one adjustable damping valve device (25, 29) and to a hydraulic system (81) connectable to at least one connection opening (85, 87) of the line block (19), wherein the line block (19) has at least one randomly actuatable check valve (97, 99) for a volume flow rate through the connection opening (85, 87).

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.

The invention relates to the field of check valves, and particularly discloses a check valve with impact resistance, which comprises a valve seat, the valve seat is mounted in a pipeline, a control assembly matched with the valve seat is arranged in the pipeline, a friction assembly is arranged on the control assembly, and the friction assembly is connected with the valve seat. The pipeline is provided with a water storage assembly communicated with the friction assembly, and the water storage assembly is provided with an extrusion assembly used for pressurization. According to the invention, the water flow control capability can be realized, the slow closing function of the control assembly can be realized when the liquid is suddenly stopped, the phenomenon that the water flow is suddenly stopped can be reduced, when the water hammer effect is generated, the backflow water can be dispersed in time, the water flow impact force can be reduced, the water flow storage buffer effect can be realized, and the water flow impact can be further reduced; therefore, impact force of water flow on the pipeline, the valve seat and the control assembly is greatly reduced, abrasion is slowed down, safe and stable operation of a pipeline system is guaranteed, stability of the system is improved, and the service life of the system is prolonged.

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.

A brake system includes a source of pressurized hydraulic fluid, a plurality of wheel brakes, and an iso / dump control valve arrangement associated with at least one wheel brake. A reservoir is connected to the source of pressurized fluid and to the iso / dump control valve arrangement. A fast-replenishing circuit includes a FR iso valve, a venting valve, and a replenishing check valve. The venting and replenishing check valves are interposed between the source of pressurized fluid and the reservoir. The FR iso valve is interposed between the source of pressurized fluid and the iso / dump control valve arrangement. When the source of pressurized fluid reaches a predetermined stroke position, the FR iso valve is energized to restrict movement of fluid from at least one iso / dump control valve arrangement to the source of pressurized fluid. The source of pressurized fluid is re-stroked to draw fluid from the reservoir through the replenishing check valve.

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.

A backflow preventer (10, 128) includes a body (12, 130). The body includes an inlet port (14, 132) and an outlet port (16, 134). A central cylindrical bore (26, 144) extends in the body and axially between the inlet port and the outlet port. A first check valve (40, 152) and a second check valve (42, 156) are removably mounted in the bore through an insertion opening (38, 150). A removable plug (94, 95, 158) is positionable in the insertion opening to hold the check valves within the bore. Some exemplary arrangements include a translucent body to facilitate visual observation of proper check valve operation and testing of the backflow preventer.

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 cutting equipment, in particular to large-size diaphragm high-precision cutting equipment which comprises cutting equipment for diaphragms, the cutting equipment is composed of a storage cover, a support, a mounting frame, a hydraulic telescopic rod and a cutting knife, and a cleaning structure for cleaning the cutting knife is arranged in the storage cover; the cleaning structure comprises a mounting plate, a scraping plate, a first guide rod and a first spring; a linkage structure is arranged in the storage cover and comprises a rack, a gear, a two-way lead screw and a sliding seat, and the upper end and the lower end of the rack are fixedly connected with the hydraulic telescopic rod and the cutting knife correspondingly; a liquid conveying mechanism connected with the scraping plate is installed on the upper surface of the storage cover and comprises a pump shell, a piston, an ejector rod, a check valve, a valve plate and a communicating structure. Lifting adjustment, cleaning and cooling lubrication of the cutting knife are integrated, the automatic and intelligent cutting process is achieved, all the components are tightly matched, the structure is compact, and the production efficiency is 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.

The present invention relates to the technical field of respiratory training equipment, and in particular to a respiratory training device, comprising a mouthpiece, a shell, an exhalation valve, and an inhalation valve, wherein the mouthpiece is connected to the shell and is provided with mutually connected airways inside; at least two concave cavities are provided on the outer wall of the shell, and vents are provided on the bottom wall of the concave cavity of the shell and the vents are connected with the airways, and a valve cover is provided on each concave cavity, and the valve cover is threadedly connected to the shell at the corresponding position of the concave cavity, and the valve cover is connected to the shell by rotating the thread to change the size of the area of ​​the concave cavity connected with the outside, and a one-way valve sheet is provided on the shell corresponding to the air vent, and the one-way valve sheet is used to limit the direction of the airflow through the vent. A respiratory training device obtained by the present invention realizes independent adjustment of the inhalation resistance and the exhalation resistance to enhance the strength and endurance of the expiratory muscles and the inspiratory muscles (diaphragm and intercostal muscles).

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.

The invention discloses a multiphase erosion corrosion coupling damaged pipeline simulation experiment test system and method. Comprising a screw pump, a pressure measurement module, a high-pressure rubber expansion joint, a gas release module, a check valve, a special feeding module, a temperature control measurement module, a wall shear force measurement bin, a fluid acceleration module, a buffer tank, a pipeline pressurization module, a temperature sensor, an electric control cabinet and a copper pipe coil cooler which are arranged on a circulating pipeline. The problem that the gas-liquid / gas-liquid-solid multi-phase erosion and corrosion coupling damage rule and the predicted damage rate are difficult to test in a high-sulfur, high-chlorine and high-acid severe environment in a petrochemical chemical production device is solved, and the damage rate of the petrochemical chemical production device is predicted by designing a special feeding structure, a pressurizing structure, an accelerating structure, a constant temperature structure, an anti-corrosion structure, an anti-abrasion structure, an anti-vibration structure and other structures and a temperature, flow, concentration and pressure precise regulation and control system. Long-time stable operation and accurate measurement of multi-phase scouring and corrosion coupling damage are realized, and safety evaluation and risk prevention and control of complex flow-induced damage of a petrochemical chemical production device are effectively supported.

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.