4124results about "Check valves" patented technology

A valve member, and related assemblies, systems, and methods, for a high-power pump may include a valve body having a valve head. The valve head may have a seal engaging surface positioned to receive a valve seal. The seal engaging surface may have a first axial position relative to a valve body axis. The valve head further may have a cavity at least partially defining a cavity interior. The cavity interior may extend between a cavity opening and a cavity end. The cavity interior may extend from the cavity opening at a second axial position spaced from the first axial position of the seal engaging surface and at least partially through the first axial position to the cavity end at a third axial position, thereby to reduce mass of the valve member and substantially maintain the strength of the valve head.

A valve member for a spring-loaded valve assembly includes a top portion having a spring retaining recess, the spring retaining recess extending into the top portion to form a void space, the void space to receive at least one coil of a spring, the spring retaining recess having a recess diameter that is smaller than a top portion diameter, wherein the recess diameter is larger than a rest diameter of a spring base including the coil, the spring retaining recess blocking expansion of the at least one coil when the spring is compressed. The valve member also includes a bottom portion coupled to the top portion. The valve member further includes a sealing element positioned axially below a shoulder of the top portion and legs coupled to the bottom portion.

The invention discloses a pilot-operated type self-driving fluid release valve, and belongs to the field of control valves. Comprising a main valve assembly, a pilot valve assembly and a one-way valve assembly. Valve bodies of the pilot valve assembly and the one-way valve assembly are integrated on a main valve body of the main valve assembly; the main valve assembly comprises a main valve body, a main valve piston, a main valve element and a main valve spring. The pilot valve assembly comprises a pilot valve air control opening, a pilot valve inlet, a pilot valve outlet channel and a pilot valve pressure relief opening. The one-way valve assembly is arranged at an outlet of the main valve and used for blocking medium backflow. Through mechanical configuration reconstruction and system integration innovation, the technical contradiction of the liquid rocket engine high-pressure gas control valve in weight, response speed and reliability is thoroughly solved.

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 present invention discloses a transmission mechanism and a drive mechanism. The transmission mechanism includes a mounting seat, a drive shaft, and a first movable member. The drive shaft can rotate relative to the mounting seat. The first movable member and the drive shaft are synchronously rotated and assembled together, and the drive shaft can drive the first movable member to rotate relative to the mounting seat to two extreme positions and an intermediate position between the two extreme positions. The transmission mechanism also includes a second movable member sleeved outside the drive shaft. The second movable member can rotate relative to the mounting seat to a first position and a second position. An elastic body and a limiting structure are provided between the second movable member and the mounting seat, and the elastic body and the limiting structure cooperate to drive the second movable member to remain in or return to the first position. A transmission structure is provided between the drive shaft and the second movable member. The drive shaft rotates and drives the second movable member to rotate to a second position through the transmission structure. The second position corresponds to an extreme position. The transmission mechanism has the following advantages: a transmission mechanism can drive the two movable members to move to appropriate positions respectively to achieve three gear switching. The structure is simple, compact, and easy to operate.

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 technical field of valve bodies, and provides a pressure reducing valve with emergency shutoff and backflow prevention functions, which comprises a main valve body, a main valve membrane and a valve core assembly, the main valve body comprises a valve cavity with a water inlet end and a water outlet end, and the main valve membrane is arranged in the valve cavity and divides the valve cavity into a control cavity and an overflowing cavity; the pressure reducing valve is in a pressure reducing dynamic adjusting state, when the pressure reducing valve is in the pressure reducing dynamic adjusting state, the shut-off reversing valve changes the position so as to close the pressure reducing pilot valve to be communicated with the water outlet end, and the pressure reducing valve is switched to an emergency shut-off state so as to be closed. When the pressure reducing valve is in the pressure reducing dynamic adjusting state, the anti-backflow reversing valve changes the position to close communication between the water inlet end and the control cavity and enable the water outlet end to communicate with the control cavity, and the pressure reducing valve is switched to be in the anti-backflow state so as to be closed. The problem that in the prior art, downstream leakage or backflow of a traditional pressure reducing valve cannot be blocked in time is solved.

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 utility model discloses a non-impact type electro-hydraulic control one-way valve which comprises a valve body, a control piston is arranged at the position, close to one side, in the valve body, a limiting rod is fixedly connected to the center of one side of the control piston, a rubber block is fixedly installed at one end of the limiting rod, and an ejector rod is fixedly connected to the center of the other side of the control piston. According to the non-impact type electro-hydraulic control one-way valve, through rubber blocks, a connector, a first spring, a movable block, a buffer block, a rubber ball, a second spring and a third spring, after a piston is controlled to complete actions and reset, the rubber block at one end of a limiting rod is tightly attached to the inner wall of the valve body, and impact generated when the piston is reset is further buffered through elasticity of rubber; in the moving process of the ejector rod, the buffer block stably moves towards the cone valve element, the rubber ball on the buffer block serves as a flexible part making contact with the cone valve element firstly, and the impact force and noise generated when the rubber ball makes contact with the cone valve element are effectively reduced.

The low-resistance range hood check valve comprises a driving ring, a longitudinal guide ring, connecting rods and a valve plate, the longitudinal guide ring is arranged in an inner ring of the driving ring, the valve plate is arranged in the inner ring of the driving ring, a plurality of inclined guide grooves are formed in the positions, corresponding to the connecting rods, of the driving ring, and a plurality of longitudinal guide grooves are formed in the positions, corresponding to the connecting rods, of the longitudinal guide ring. The connecting rod sequentially penetrates through the oblique guide groove and the longitudinal guide groove and is hinged to the valve plate. According to the low-resistance check valve for the range hood, through rotation of the driving ring and matching and limiting of the oblique guide groove and the longitudinal guide groove, the connecting rod moves up and down, the valve plate is dragged to be switched between the opening state and the closing state, and the requirement for conducting or cutting off a pipeline channel is effectively met; the movement trend that the valve plate covers the fixed base due to the dead weight or the torsion spring is avoided, it is effectively guaranteed that no pressure loss is caused to the air pressure of the draught fan in the opening state, and the oil smoke suction and exhaust effect of the range hood is improved.

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 utility model discloses a rocker arm type quick closing check valve in the technical field of check valves, which comprises a valve body of the check valve, a valve seat is embedded on one side in the valve body, a cavity is arranged on the inner side of the valve body, a valve cover is mounted at the top of the valve body through a plurality of bolt columns, nuts are mounted at the tops of the bolt columns in a threaded manner, and the valve cover is provided with a rocker arm. A check piece used for preventing backflow is installed on the inner side of the valve body, the valve seat is annularly embedded in a cavity of the valve body, the upper surface of the valve deck is in an arc shape, a plurality of bolt columns penetrate through the valve deck, and then nuts are in threaded connection with the bolt columns to install and fix the valve deck. And the non-return piece in the valve body can enable the fluid penetrating through the valve seat to perform anti-backflow non-return operation, so that the anti-backflow efficiency and accuracy are improved.

An additive manufactured (AM) hydraulic control assembly includes a first AM hydraulic passage having a first tubular wall defining a first fluid passage, a second AM hydraulic passage integrally formed with the first AM hydraulic passage and having a second tubular wall defining a second fluid passage, and an AM wall integrally formed with the first and second AM hydraulic passages and fluidly separating the first and second fluid passages. At least one of (i) a hydraulic control orifice is formed in the AM wall and configured to regulate fluid flow and pressure between the first and second fluid passages, and (ii) a ball seat is formed in the AM wall and a check ball is disposed in one of the first and second fluid passages and configured to selectively seal against the ball seat to facilitate preventing fluid flow therethrough.

The utility model discloses a double-adjustment check valve, which belongs to the technical field of check valves, and comprises a valve body, a check assembly and an adjustment assembly, two ends of the valve body are respectively provided with a water inlet channel and a water outlet channel, a valve hole is arranged in the valve body and between the water inlet channel and the water outlet channel, the top of the valve body is fixedly provided with a valve cover, and the valve cover is fixedly provided with a valve core. The non-return assembly comprises a limiting block installed in the valve deck in a sliding mode, a spring is fixedly connected to the bottom of the limiting block, a valve element is fixedly connected to the lower end of the spring, the adjusting assembly comprises a supporting cylinder fixedly connected to the valve deck, and the inner top wall of the supporting cylinder is in threaded connection with a screw rod. The screw rod is inserted into the limiting block and is in threaded connection with the limiting block; through the arrangement of the adjusting assembly, the initial compression amount of the spring can be controlled, the pressure needed for overcoming the elastic force of the spring can also change, and the opening water pressure corresponding to the check valve can be adjusted so as to adapt to various requirements under different working conditions.

A washer liquid supply valve includes a valve body provided with an inflow hole and a discharge hole configured to allow a washer liquid to flow into and out of the valve body therethrough, a housing detachably combined with an upper part of the valve body, a coil assembly installed in the housing and configured to generate magnetic force when power is applied to the washer liquid supply valve, a core combined with the coil assembly while penetrating the coil assembly and magnetized by the magnetic force generated by the coil assembly, plunger installed in the core so as to be movable and configured to be moved upwards when power is applied to the washer liquid supply valve, and a spring interposed between the core and the plunger so as to elastically support the plunger towards the valve body.

The invention relates to the technical field of pipeline filters, in particular to a self-cleaning filter and a check valve, the self-cleaning filter comprises a pipe body and an annular filter screen, a bottom plate is coaxially fixed at one end of the annular filter screen, a water guide column is arranged on one side of the bottom plate, one end of the annular filter screen is fixedly connected with the inner wall of the pipe body through a fixing ring, and a central column is coaxially arranged at the water inlet end of the pipe body; a spiral flow channel is arranged between the central column and the inner wall of the pipe body, a slag discharging opening and a slag discharging pipe are arranged on the bottom plate, one end of the slag discharging pipe is communicated with the slag discharging opening, the other end of the slag discharging pipe penetrates through the pipe body and then is located outside the pipe body, and a cleaning mechanism is further arranged in the pipe body. Through cooperation of the spiral flow channel, the water guide column, the annular filter screen and the cleaning mechanism, the automatic cleaning of the annular filter screen is synchronously realized in the fluid filtering process, so that the filtering effect of the annular filter screen is ensured.

A pool cycling valve with a valve body, a ratchet assembly, and a bottom plate. The valve body has an inlet port and a plurality of outlet ports. The ratchet assembly is rotatably coupled to the valve body and has a ratchet arm extending away from the ratchet assembly. When in a closed position, the ratchet assembly is configured to interfere with a stream of water. When in a open position, the ratchet assembly is rotated from the closed position by a predetermined angle. The bottom plate has an outlet port aperture aligned with one of the outlet ports and a ratchet tooth operably aligned with the ratchet arm. When the ratchet assembly rotates from the open position to the closed position, the ratchet assembly aligns the outlet port aperture with a different outlet port.

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.

Hydraulic fluid release valve assemblies are described herein. The hydraulic fluid release valve assemblies may include a hydraulic unit base with a hydraulic fluid return channel and a hydraulic fluid release valve that is at least partially inserted in the hydraulic fluid return channel. The hydraulic fluid release valve assembly may further include a driving assembly to contact with the hydraulic fluid release valve to apply a pushing force on the hydraulic release valve to open the hydraulic fluid release valve, and an electrically powered driver connected to the driving assembly, the electrically powered driver, when actuated, causes the driving assembly to move to apply the pushing force to the hydraulic fluid release valve.

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.

According to the check valve and the check system, the valve element is installed in the installation inner cavity in the sliding mode so that the valve element can move between the blocking position for blocking the outlet of the inflow channel and the opening position for opening the outlet of the inflow channel, and when the valve element opens the outlet of the inflow channel, the inflow channel is communicated with the outflow channel through the groove; the elastic piece always applies elastic force to the valve element to enable the valve element to keep or return to the plugging position, the grooves penetrating through the valve element in the circumferential direction of the valve element are formed in the circumferential side surface of the valve element at intervals, fluid can pass through the grooves when the check valve is opened, the fluid is prevented from passing through the interior of the valve element, and therefore the fluid reversing amount is small, and the valve element is not prone to falling off. Therefore, the flow resistance in a pipeline is reduced, and the service life of the check valve is prolonged; meanwhile, due to the fact that the valve element is made of the non-metal elastic body, impact force generated when the check valve is opened and closed is buffered, sealing performance is considered at the same time, and reliability of the check valve is improved.

A valve connector includes a body having a first end adapted to attach to an American valve, a second end opposite the first end, and a through hole extending through both ends. A shoulder portion divides the through hole into a first accommodating portion and a second accommodating portion, with a sealing ring disposed on the second accommodating portion. A control member is movably disposed in relation to the body between a first and second position. The control member includes a body portion, a guiding hole, an abutting end, and a control end adapted to communicate with an air pump device. A venting portion is arranged between the abutting end and the control end, having a first cross-sectional area smaller than a second cross-sectional area.

A self-inflating stowable bed. The bed includes one or more self-inflating chambers, with each of the self-inflating chambers having one or more polyurethane foam sections therein, with the chamber defined between a first air impervious layer and a second air impervious layer. The self-inflating bed may be evacuated by a household or shop vacuum, and then sealed, rolled or folded, and easily stored or shipped. The polyurethane foam sections may be provided with different members having different indentation force deflection specifications suitable for bed portions and edge of bed portions.

The invention relates to the technical field of fluid control equipment, and discloses an anti-backflow valve which comprises a valve body, a valve rod, a sealing valve seat and a valve plate, an output pipe is arranged on the outer wall of the right side of the valve body, an input pipe is arranged at the bottom of the valve body, the sealing valve seat is fixedly installed in the input pipe, and the valve plate is pressed on the sealing valve seat. The valve rod is rotated to drive the connecting disc to rise, the spring drags the valve plate to rise, the valve plate is separated from the sealing valve seat, the inserting rod is arranged, on one hand, the valve plate is guided, on the other hand, when the valve needs to be closed, the valve rod can drive the inserting rod to move downwards, and then the valve plate is tightly pressed on the sealing valve seat; if the water pressure in the input pipe is lower than the water pressure in the valve cavity of the valve body, the pressure acting on the upper surface of the valve plate can downwards press the valve plate at the moment, then the valve plate is pressed on the sealing valve seat, the valve is closed, and then the backflow problem is avoided.

The invention discloses a well drilling fracturing device for oil field yield increase, and relates to the technical field of oil field collection, the well drilling fracturing device comprises a fracturing filtering mechanism and a bottom rotating bearing installed in the fracturing filtering mechanism, the bottom of the fracturing filtering mechanism is provided with a connection sealing mechanism, and the bottom of the connection sealing mechanism is provided with a main pipeline; the fracturing filtering mechanism comprises a filtering support, a plurality of sewage draining holes are formed in the outer side of the filtering support, a worm gear limiting cover is fixedly installed at the bottom of the filtering support, rotating supports are symmetrically installed on the side, close to the interior of the worm gear limiting cover, of the filtering support, and rotating motors are fixedly installed on the outer sides of the rotating supports; by utilizing the structural characteristics of the vortex cleaning impeller, when the vortex cleaning impeller rotates anticlockwise, the temporary plugging agent can move towards the inner side of the filter screen cylinder under the action of the groove in the vortex cleaning impeller, so that the conveying efficiency of the temporary plugging agent is improved, and meanwhile, the vortex cleaning impeller can clean the outer surface of the filter screen cylinder.

A valve cartridge for a fluid end for a well stimulation pump is discussed and illustrated. The valve cartridge optionally includes: a valve body, a spring engaging the valve body on a first side thereof, and a housing at least partially enclosing the valve body and spring. The housing can define one or more passages therethrough. The housing can define one or more seats adjacent the one or more passages. The one or more seats can be configured to be selectively engaged by the valve body on a second side thereof.

The invention discloses a slow-closing check valve and relates to the technical field of valves, the slow-closing check valve comprises a valve body and an opening and closing mechanism, the valve body is provided with an inner cavity, the two ends of the inner cavity are open, and the inner cavity comprises a rotating cavity in the middle and two channels on the two sides; the opening and closing mechanism comprises a main valve clack and an auxiliary valve clack, the main valve clack is rotationally arranged above one side of the rotating cavity and opens or closes the channel in a rotating and swinging mode, a liquid passing opening is formed in the main valve clack, and the auxiliary valve clack is rotationally arranged above the liquid passing opening and opens or closes the liquid passing opening in a rotating and swinging mode; rotation between the auxiliary valve clack and the main valve clack has a damping effect. The valve has the advantages that the water hammer effect is effectively relieved, sequential closing of the main and auxiliary valve clacks is achieved, and the safety of a pipeline system is improved.

The utility model relates to the technical field of valves, and discloses a check valve which comprises a valve body, the left end and the right end of the valve body are both fixedly connected with butt joint plates, the inner wall of the valve body is connected with an attaching ring through an extrusion set so that the attaching ring can move, and the top end of the valve body is fixedly connected with an adjusting pipe. The bottom end of the right end of the attaching ring is connected with a fixing gear through a fixing set so as to be used for positioning the fixing gear, the right end of the inner wall of the adjusting pipe is fixedly connected with a fixing block, the left end of the fixing block is connected with a connecting pipe through a sealing set so as to be used for resetting the connecting pipe, and the top end of the sealing plate is in threaded connection with an extrusion rod. The bottom end of the extrusion rod is connected with an expansion air bag through an expansion set. According to the device, the sealing plate is closed in the fixing ring, and then the sealing plate is closed at the sealing ring, so that the one-way circulation effect of the device is improved when a medium circulates, the fluid conveying efficiency is improved, and the energy loss is reduced.