2129results about "Check valves" patented technology

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 utility model discloses a one-way valve with a pressure relief protection function, and particularly relates to the technical field of one-way valves, which comprises a valve body, a discharge pipe is arranged at one end of the valve body in a penetrating manner, an outer valve sleeve is arranged on one side of the valve body in a penetrating manner, a pressure relief mechanism is arranged in the outer valve sleeve, and the pressure relief mechanism comprises a pressure relief valve seat arranged in the outer valve sleeve. A guide groove is formed in the outer valve sleeve, a guide ring is slidably arranged in the guide groove, a pressure relief valve element is fixedly arranged in the guide ring, a pressure relief spring is fixedly arranged at the top of the pressure relief valve element, an adjusting disc is slidably arranged on the inner wall of the valve body, and a threaded rod is rotatably arranged on one side of the adjusting disc. When the fluid pressure abnormally rises, the pressure relief channel can be automatically opened, the one-way valve and a conveying system are effectively protected, the position of the pressure relief valve element can be conveniently and manually adjusted, pressure relief parameters are flexibly controlled, and the requirements of different working conditions are met.

The invention relates to the technical field of valves, in particular to a duplex check valve. Comprising a valve body, a circulation opening formed in the valve body, a valve seat arranged on the valve body and located in the circulation opening, a first through hole formed in the valve seat, a sealing valve clack arranged in the valve body in a lifting mode, a guiding piece arranged between the valve seat and the sealing valve clack, and a compression spring arranged between the guiding piece and the sealing valve clack. The auxiliary sleeve is arranged on the valve body and located at the circulation opening, the second through hole is formed in the valve body, the auxiliary valve clack is arranged on the valve body in a lifting mode and located in the circulation opening, the lower end of the auxiliary guide rod is fixedly arranged on the sealing valve clack, the linkage shaft is arranged at the lower end of the sealing valve clack and located in the auxiliary sleeve, and the lower end of the linkage shaft makes contact with the upper end of the auxiliary guide rod. Through the design of the double valve clacks, the double-sealing effect is achieved, the reliability and the sealing performance of the check valve are improved, the linkage shaft structure ensures that the main valve clack and the auxiliary valve clack move synchronously, and response is rapid.

A breakaway valve for a cryogenic fluid tank includes a tank-side valve and a nozzle-side valve. The tank-side valve is connected to and forms a first vacuum-insulation layer with a first jacketed hose. The first jacket support includes first bellows configured to reduce heat transfer with the first vacuum-insulation layer and one or more first bellow supports that include first teeth inserted between and engaging the first bellows to provide structural support to the first bellows. The nozzle-side valve is connected to and forms a second vacuum-insulation layer with a second jacketed hose. The second jacket support includes second bellows configured to reduce heat transfer with the second vacuum-insulation layer and one or more second bellow supports that include second teeth inserted between and engaging the second bellows to provide structural support to the second bellows.

The device for varying the incline of photovoltaic power generation inclination by using fluid thermal expansion of the present invention comprises a thermal expansion cylinder device and an automatic deviation correction device for simultaneously correcting deviations of the height and inclination angle of a photovoltaic panel. The thermal expansion cylinder device is composed of a thermal expansion fluid, a main piston, and a cylinder. The cylinder interior is filled with the thermal expansion fluid, the volume of which expands or contracts according to the temperature, thereby moving the main piston in the longitudinal direction. The linear displacement of the thermal expansion cylinder device installed between the photovoltaic panel and a fixed structure contracts when the ambient temperature is low (for example, winter solstice), thereby increasing the angle of inclination of the photovoltaic panel, and the linear displacement of the thermal expansion cylinder device expands when the temperature is high (for example, summer solstice), thereby lowering the angle of inclination of the photovoltaic panel. The automatic deviation correction device comprises an expanded volume accommodation device, a spring, an auxiliary piston, a check valve, and a pushrod. The forward movement length of the main piston is limited after summer solstice when the upper limit setting value is set. The check valve is opened by the thermal expansion fluid pressure such that the fluid flows into an excess expanded volume accommodation device. The auxiliary piston moves backward and compresses the spring, and when the temperature descends again after the highest temperature has been reached, the check valve is closed by the spring elastic force and pressure deviation.

The invention provides an integrated pressure protection double-layer corrugated pipe vibration reduction pipe, and belongs to the field of vibration absorbers. An interlayer cavity is formed in the pipe wall of the vibration reduction pipe; gap grooves are formed in the middles of the outer end faces of the flange plates, so that steps are formed on the outer end faces of the flange plates around the edge portions of the gap grooves, and inlet holes and outlet holes are formed in the gap grooves of the two flange plates respectively. The safety valve and the one-way valve are arranged in the interlayer cavity and connected to the inlet hole and the outlet hole, the safety valve allows or limits the medium to enter the interlayer cavity through the inlet hole according to whether the external pressure exceeds the preset pressure, and the one-way valve limits the medium to flow out of the interlayer cavity only through the outlet hole. The safety valve is arranged, so that a medium in the inner layer of the pipeline enters the interlayer cavity, the pressure value in the inner layer of the pipeline is reduced, the pressure of the medium is prevented from exceeding the yield limit of an inner-layer corrugated pipe material, and the medium entering the interlayer cavity can flow back to a low-pressure area through the one-way valve; and the safety and the reliability of the double-layer corrugated pipe vibration reduction pipeline are improved.

The invention relates to the technical field of check valves, in particular to a butterfly check valve with opening indication, which comprises a valve body, a transmission gear and a frame body are respectively arranged on the surface and the top of a right-angle part of an L-shaped mounting groove of the valve body, and a screw rod transmission mechanism on the inner wall of the frame body is respectively connected with the transmission gear and a strip-shaped sliding seat which is horizontally and slidably connected to the top of the frame body; a mechanical opening indicating mechanism; and a sensing indication mechanism is integrated. Opening, flow, pressure and sealing states can be detected synchronously, mechanical indication and electronic sensing are combined, electricity-free use and digital reading are both considered, and misjudgment is reduced through the multi-redundancy design; the transparent observation plate and the modular structure are convenient to operate and maintain, and the liquid collection and drainage design prevents interference of condensate water; the flowmeter wear-resistant ceramic probe and the pressure sensor moisture-proof shell are adaptive to complex working conditions; backflow can be effectively recognized through bidirectional flow detection and triple sealing verification, the safety redundancy of a system is greatly improved, and the problems that a traditional check valve is single in function and insufficient in reliability are solved.

The disclosed technology includes an air valve assembly for providing flexibility for a user when inflating an inflatable air mattress. The air valve assembly can include a base configured to attach to a portion of the inflatable air mattress, a middle valve configured to attach to the base portion and having a first diameter, a diaphragm member configured to attach to the middle valve, and a cap configured to removably couple to a portion of the air valve. The assembly can further include an adapter configured to detachably attach to the middle valve portion. The adapter can have a portion with a second diameter that is smaller than the first diameter such that when the adapter is attached, a user may use an inflation device with a smaller dimensioned output.

A method for inspecting an erroneous / missing part of a discharge valve structure according to the present invention is a method for inspecting the erroneous / missing part of the discharge valve structure (1) of a compressor. The discharge valve structure (1) has an assembly structure including a partition wall (12), a discharge valve (12), a valve retainer (300) and a fixing bolt (40), and an inspection structure in which the valve retainer has an inspection hole (33) for inserting an inspection member and at least a part or the whole of the discharge valve enters a region of the discharge valve (20) corresponding to the inspection hole (33). The presence or absence of the discharge valve is inspected by inserting the inspection member into the inspection hole and by an insertion depth of the inspection member.

According to the Tesla valve structure-imitated micro-flow controller and the preparation method thereof, improvement design is carried out on the basis of an existing Tesla valve structure, the pipe wall of a first branch straight pipe section is designed to be of an arc-shaped structure, the area is increased by 20%-30%, a sawtooth-shaped structure is arranged on the pipe wall, a tiny cavity is additionally formed in a second branch straight pipe section, and the area of the first branch straight pipe section is increased by 20%-30%; the diameter of the structure of the shunting section is modified to be gradually increased, so that the cross sectional area of the shunting section is expanded by 25%-30%, the inner diameter of the branch annular section is reduced, the outer diameter of the branch annular section is expanded, the area of the expanded branch annular section is increased by 25%-35%, and the length of the outlet section is prolonged to be 30%-40% of the original length. The micro-flow controller with the imitated Tesla valve structure prepared by the invention can effectively guide fluid to flow, reduce accumulation of micro-particles in a micro-channel and enhance the impurity particle embolism resistance of a system, so that the stability and reliability of the whole system are improved.

The application discloses a kind of constant humidity air conditioner humidifier liquid level control device and method, belong to air conditioning and environmental control technical field.The liquid level control device includes perception and feedback module, execution and control module, support and water inlet and outlet module.The beneficial effects of the present application include: the automatic switching of humidifier water supply valve open\close state is realized, so that the dynamic accurate control of humidifier water tank liquid level under high temperature and high humidity condition is carried out;The scheme does not depend on complex electronic detection and control circuit, there is no risk of water vapor diffusion penetration to circuit hardware, can cope with mild scale influence, parts cooperate smoothly, overall structure is stable and reliable, water supply dynamic response is sensitive, boiling interference resistance is strong, suitable for long-term stable operation under high temperature and high humidity environment.

A store housing for an electrical energy store of a motor vehicle includes multiple housing walls which surround a receiving space for receiving at least one storage component of the electrical energy store, wherein at least one of the housing walls has a passage opening for discharge of a liquid which has accumulated in the receiving space into surroundings of the store housing, and at least one valve which is designed to conduct the liquid away from the receiving space into the surroundings via the passage opening and to at least reduce ingress of liquid from the surroundings into the receiving space via the passage opening. The at least one valve has a passive valve arranged in or at the passage opening. The valve has a first flow resistance in a first flow direction from the receiving space into the surroundings and has a second flow resistance in a second flow direction from the surroundings into the receiving space, which second flow resistance is larger in comparison with the first flow resistance.

A break check valve can include one or more rotating members configured to rotate to alter the break check valve from an open position to a closed position upon dislocation of a pipe system fitting, the break check valve being altered from an open position to a closed position when acted upon by fluid within a piping system.

The invention belongs to the technical field of pipeline valves, and particularly relates to a resistance-free prevention valve. Comprising a discharge valve, a main valve and two check valves, and the two check valves are fixedly installed in an inner cavity of the main valve and divide the inner cavity of the main valve into an inlet cavity, a middle cavity and an outlet cavity. When the pressure difference between the inlet cavity and the middle cavity is larger than a set value, the discharge valve is closed, and when the pressure difference between the inlet cavity and the middle cavity is continuously smaller than the set value, the pressure difference discharge valve is opened, discharge and pressure reduction are conducted through the discharge channel, and the discharge valve is closed until the pressure difference between the inlet cavity and the middle cavity recovers to the set value; the anti-misoperation device is arranged in the discharge valve, so that misoperation discharge of the discharge valve caused by water pressure fluctuation in a pipeline can be effectively prevented, and water pressure loss is avoided; valve membrane abrasion is reduced, and the service life of the discharge valve is prolonged; and the pressure difference during drainage can be adjusted according to working conditions and requirements.

A method of lubricating a transmission system including: scavenging, via a lubrication tube of a lubrication system disposed within the transmission system, oil from at least one of a plurality of gears; directing the scavenged oil from the lubrication tube to a plurality of oil conduits extending from the lubrication tube; and translating a shift assembly in a longitudinal direction such that the shift assembly actuates a plurality of poppet valve assemblies disposed in the plurality of oil conduits between a closed position and an open position. The scavenged oil circumventing the plurality of poppet valve assemblies in the open position and the plurality of poppet valve assemblies form a seal with the plurality of oil conduits in the closed position.

A hydrogen pressure reducer for a hydrogen supply system of a hydrogen fuel automobile relates to the technical field of hydrogen pressure reducers and comprises a valve body, a diaphragm type pressure reducing mechanism, a pilot-operated electromagnetic valve, a gas inlet and a gas outlet. The interior of the valve body is divided into a high-pressure cavity and a low-pressure cavity through the valve The diaphragm type pressure reducing mechanism is composed of a valve element assembly, a diaphragm assembly and a pressure adjusting assembly which cooperate to enable the output pressure of the air outlet to be kept stable, and assembly errors are eliminated. The valve element assembly is provided with a necking part to adjust the opening degree of a throttling hole, and accurate control is achieved. The base provides guiding constraint, and reliable sealing is ensured. The diaphragm assembly adopts a supporting disc, a diaphragm, a pressing disc and a locking nut fixing structure, so that the diaphragm is prevented from deforming, and the service life is prolonged. The pressure adjusting assembly comprises an upper cover, a pressure adjusting spring, a pressure adjusting spring seat and a pressure adjusting stud, and the pressure adjusting accuracy and stability are guaranteed. The overall reliability, sensitivity and safety of the hydrogen pressure reducer are improved.

A magnetic non-return valve having a valve body and a valve housing arrangement, wherein the valve body is guided so as to be axially displaceable in the valve housing arrangement and closes the fluid duct of the valve housing arrangement by way of a holding force acting counter to the direction of flow, wherein the axial holding force is generated by a repelling magnet arrangement, wherein a concentric piston connected to the valve body via the end face comprises a first magnet arrangement and the valve body guide comprises a second magnet arrangement, wherein the first magnet arrangement is arranged in a cavity of the piston and is enclosed so as to be media-tight on all sides, and the second magnet arrangement is arranged in a cavity of the valve body guide and is enclosed so as to be media-tight on all sides.

The utility model discloses a one-way valve applied to an automobile suspension system, and belongs to the technical field of automobile parts, the one-way valve comprises a valve body, a valve core, an elastic piece and a ball body, the valve body is of a circular tube structure, two ends of the valve body are respectively a lead-in port and a lead-out port, the valve core is installed in the valve body, and the elastic piece is installed in the valve body. At least three supporting feet are arranged on the outer surface of the valve element and abut against the inner wall face of the valve body, a fluid channel for fluid to pass through is reserved between the outer surface of the valve element and the inner wall face of the valve body, and a ball is installed at the end, close to the valve body guide-in opening, of the valve body through an elastic piece. And the ball body moves to one side of the guide-in opening under the action of the elastic piece to block the guide-in opening. The structural design of the one-way valve is optimized, the fluid flow which can pass through is effectively improved, and the one-way valve is simple and reliable in structure.

The present disclosure relates to a check valve (1) comprising: a valve housing (10); a valve member (11) within the housing, the valve member being movable between an open position and a closed position; and at least one restricted channel (14) through the valve member, wherein, in the closed position, the at least one restricted channel is arranged to allow a restricted backflow of fluid through the valve. The present disclosure also relates to a system comprising: an electrochemical device and the check valve, wherein the check valve is connected to an outlet pipeline of the electrochemical device.

A hydraulic port protection plug for insertion into a hydraulic port in a shock absorber assembly, where the hydraulic port protection plug comprises a cap portion with a disc-shaped end wall and a tubular body that extends from the cap portion to define an open-ended cavity. The open-ended cavity extends within the tubular body of the hydraulic port protection plug and is bounded at one end by the cap portion. A self-closing pressure relief opening extends through the cap portion and is arranged in fluid communication with the open-ended cavity. At least a portion of the cap portion is made of an elastic material that permits the self-closing pressure relief opening to open and close in response to pressure changes.

A check valve includes a valve element and a valve body having a body housing, an annular valve seat insert, a bushing, and a biasing member. The body housing includes an outer circumferential wall extending between an inlet port and an outlet port to define a valve cavity therebetween. The valve seat insert is seated in a body seat surface surrounding the inlet port. The bushing is disposed in the valve cavity and defines a central bore, with the bushing including an outboard end surface axially engageable with the valve seat insert. The biasing member is disposed between a bearing portion of the body housing and an inboard end of the bushing to allow for axial movement of the bushing with respect to the body seat surface. The valve element extends through the bushing central bore and is movable between a closed position and an open position.

A patient interface includes a mask body, an elbow, a connector and a conduit. Any one or more of the mask body, the elbow, the connector and the conduit includes a bias flow vent. The bias flow vent is configured to deform with the application of pressure but not fully collapse such that an orifice size defined by the bias flow vent can vary with the application of pressure.

A pneumatic valve features a housing with an air chamber including a supply opening for compressed air, a connecting opening to an air cushion, and a discharge opening. An actuator with a movable closing element, comprising a plunger and a plate with a first sealing element, is positioned within the housing. The actuator includes a circuit board, an actuating element with an actuating portion and a bending portion, and a shape memory actuator element. In a non-energized state, the actuator element positions the actuating element to press the plunger against the supply opening, while in an energized state, it allows the first sealing element to close the discharge opening via an elastic element. A second sealing element closes the supply opening in a non-energized state and opens it under positive pressure when energized. A third sealing element, elastically connected to the second, closes the supply opening under non-positive pressure conditions.

A check valve comprising, between an inlet end and an opposite outlet end along a common longitudinal axis, optionally an adapter arranged between the inlet end and a seal seat, a seal seat formed by a rigid scaffold, a closure element formed by an elastic closure part, optionally a stop ball, and optionally a stop that can be latched to the scaffold, wherein the scaffold and the closure part are shaped to match one another in the region of the seal seat, and the closure part is tensioned against the scaffold in the region of the seal seat in the rest position and is retained therein, wherein the scaffold has breaches in the region of the seal seat, and the closure element is formed in one piece with a venting device.

Disclosed in the present application are a flow valve and a control method therefor, a zero-cold-water circulation system of a water heater, and a water heater. The flow valve (100) is used for a zero-cold-water circulation system of a water heater. The zero-cold-water circulation system of the water heater comprises a heat exchanger (200), and a cold-water intake pipe (300) and a hot-water output pipe (400), which are in communication with the heat exchanger (200). The flow valve (100) comprises: a valve body (10), which is provided with a bypass flow passage (110) configured to bring the cold-water intake pipe (300) into communication with the hot-water output pipe (400), wherein the bypass flow passage (110) has at least a first branch passage (1101) and a second branch passage (1102) that are arranged in parallel; and a switching valve (20) disposed on the valve body (10) and configured to open or close the first branch passage (1101).

The invention provides a water chilling unit which comprises a compressor and a condenser, an outlet of the compressor communicates with an inlet of the condenser through a compressor outlet pipeline, and a check valve with a magnet is further arranged in a discharging pipeline. When the water chilling unit normally operates, the check valve is kept at the maximum opening degree through the magnets with attracted heteropoles, and when the water chilling unit stops operating, closing of the check valve is buffered through the magnets with repulsive homopoles.

The present disclosure provides a vehicle leak detection apparatus with automatic intake pressure regulation, comprising: an air pump; a first pipeline configured to allow air pumped by the air pump to be pumped into a test vehicle; a smoke generation unit arranged between the air pump and the test vehicle and configured to generate visible smoke in the air pumped into the test vehicle; and a check valve removably connected to the first pipeline and configured to release air after an air pressure in the first pipeline exceeds an intake pressure that the check valve can withstand so as to automatically regulate the intake pressure during vehicle leak detection.

Disclosed is a valve apparatus having a first pressure compensation valve, a first, gas-tight, cap-like membrane device, and a gas-permeable, moisture-permeable, and yet water-impermeable second membrane device. The first pressure compensation valve, in particular a back-pressure valve, having a first valve housing, which limits a pressure compensation opening and comprising a housing side and a covering side, comprising or consisting of a first, gas-tight, cap-like membrane device covering a first pressure compensation opening and releasing the first pressure compensation opening from a predetermined negative pressure prevailing on the housing side in order to enable a pressure compensation between a housing device and an environment, and a gas-permeable, moisture-permeable, and yet water-impermeable second membrane device arranged on the covering side and in series to the first membrane device, covering a second pressure compensation opening and preventing water entry into the valve housing and thus into a housing device.

A double-use nozzle adapter includes a main body, a switch unit, and a needle unit. The switch unit includes a shifting member and a rigid retaining member. The rigid retaining member is arranged between the shifting member and the main body. The shifting member shifts the rigid retaining member between a first position and a second position. The needle unit is slidably installed in the main body and includes a needle. In the first position, the shifting member drives the rigid retaining member to press against the needle, thereby preventing the needle from moving with respect to the main body and making the needle connectable to a Schrader valve. In the second position, the rigid retaining member moves between the shifting member and the main body, so as to allow the needle to move with respect to the main body and make the needle connectable to a Presta valve.

A non-return valve for a flow channel has a housing and an outflow opening that can be closed by a pivoting blocking flap. The blocking flap has a dome-shaped bulge. An opening edge of the outflow opening has a hinge region for the blocking flap that transitions into a blocking flap stop region circumferentially opposite the hinge region. The blocking flap stop region is offset so that the opening edge has a progression that is curved in the circumferential direction and in the outflow direction. The housing has an indentation in the circumferential direction, which is not closed by the blocking flap such that the indentation forms a condensate chamber when the housing is inserted into the surrounding flow channel. The indentation is equipped with a flow opening, through which a condensate accumulating in the condensate chamber delimited by the indentation can flow in the interior of the housing.