316results about "Venting valves" patented technology

The automatic cover plate comprises a base, a seat ring and a toilet cover, the base is provided with an air compression device and a pneumatic limiting device, the air compression device is provided with an air return structure, and the pneumatic limiting device is provided with a slow leakage valve; the seat ring is rotatably mounted on the base, and the seat ring in a seated state can close the slow leakage valve; the barrel cover is rotationally installed on the base and is in transmission fit with the air compression device, a first reset structure matched with the pneumatic limiting device is arranged between the barrel cover and the base, and when the barrel cover rotates from the closed position to the open position, the barrel cover drives the air compression device to exhaust air in the air compression device to the pneumatic limiting device through the first flow channel; the pneumatic limiting device is driven to limit work of the first reset structure. According to the automatic cover plate, the barrel cover can be automatically closed after a period of time of defecation of a user, the problem that the user forgets to cover the barrel cover after defecation is solved, and the user is allowed to open or close the barrel cover at any time according to needs.

The automatic exhaust valve comprises a valve body, a valve deck, an automatic exhaust assembly and a suspension part, one end of the valve body is connected with a water pipe through a drainage hole, the other end of the valve body is connected with the valve deck in a sealed mode, the periphery of the valve body is connected with the automatic exhaust assembly through a ventilation pipeline, and the suspension part is located in a cavity of the valve body and connected with the automatic exhaust assembly. The automatic exhaust assembly comprises an exhaust plug, an elastic piece and an exhaust pipe which are sequentially connected in the axial direction of the automatic exhaust assembly, the exhaust plug and the exhaust pipe are sleeved with the elastic piece, and the exhaust plug is located at the end, stretching into the ventilation pipeline, of the automatic exhaust assembly. A sealing groove is formed in the end, facing the elastic piece, of any one of the venting plug and the exhaust pipe, a sealing piece is embedded in the sealing groove, and the two ends, in the axis direction of the automatic venting assembly, of the sealing piece abut against the venting plug and the exhaust pipe in an interference fit mode respectively. The end, facing the elastic piece, of the exhaust plug is provided with a sealing protrusion, and the end, facing the exhaust pipe, of the sealing protrusion is embedded into the exhaust through hole of the exhaust pipe.

This invention relates to a valve assembly disposed between a vacuum pump and an adsorption pad in a vacuum system, thereby enabling venting of the pad. The valve assembly includes: a main body having a space within an internal channel; a valve plate capable of being raised / lowered within the space; and vents variablely configured by air gaps formed at the contact points between the valve plate and the upper sill of the space. Initially, temporary venting is performed through the open channel; subsequently, as the plate 'rises,' micro-venting is performed through the vents formed at the contact points between the plate and the upper sill.

A pressure relief valve having an inlet port and an outlet port is disclosed for retaining pressure from an outlet until a set pressure is achieved at the inlet. The valve is disposed between the inlet and outlet ports and has a valve member movable between an open position that allows fluid flow between the ports and a closed position that prevents fluid flow. Inlet pressure acts on the valve member to increase its closing force. A movable sensing spindle is provided in fluid communication with the inlet pressure and a reference pressure, the sensing spindle having a first position and a second position. As the pressure difference between the inlet pressure and the reference pressure increases toward the set pressure, the sensing spindle moves, eventually acting on the valve member to move it away from its sealing position, thus providing an opening for fluid to flow from the inlet to the outlet.

Disclosed is a pressure relief valve with inlet and outlet ports, to hold pressure from outlet until a set pressure is achieved at the inlet. The valve has a valve member located between the inlet and outlet ports, movable between an open position to allow a fluid flow between the ports, and closed position to prevent fluid flow. Inlet pressure acts on the valve member to increase its closing force. Provided is a movable sensing spindle in fluid communication with the inlet pressure and a reference pressure, the sensing spindle having a first position, and a second position. Increased pressure difference between the inlet pressure and reference toward the set pressure moves the sensing spindle to eventually acts on the valve member to move it away from it's sealing position and thus provide an opening for fluid to flow from the inlet to the outlet.

The utility model belongs to the technical field of ventilation control solenoid valves, and provides a multistage adjustment ventilation control solenoid valve structure which comprises a valve core shell, a first pipe joint and a second pipe joint, the valve core shell is arranged above the first pipe joint, and the second pipe joint is arranged below the first pipe joint; wherein the side face of the first pipe joint is provided with a side face ventilation opening, the bottom of the first pipe joint is provided with N ventilation openings, an inner cavity of the second pipe joint is communicated with the N ventilation openings in the bottom of the first pipe joint, and the second pipe joint is further provided with a total ventilation opening communicated with the inner cavity of the second pipe joint and the outside. M valve elements are installed at the bottom of the valve element shell and extend into the first pipe connector, and the valve elements are matched with ventilation openings in the bottom of the first pipe connector. Wherein M is less than or equal to N. The three electromagnetic assemblies are arranged to control opening and closing of the three valve elements of different specifications respectively, multi-stage adjustment of ventilation flow in the flight process of an airplane is achieved, the multi-stage ventilation flow adjusting device is used for being matched with various flight working conditions of the airplane, and the working performance of a lubricating oil system is improved.

Air valves for cases are shown and described. In one embodiment, an air valve includes an insert, a receiver, and spacer. In other examples, embodiments include a case having an air valve. Examples of an air valve system may include an insert assembly, a receiver assembly, and a sealing assembly. The result is a cost effective, reliable, easy to use, air venting system.

The invention relates to a device (1) for pressure compensation in a housing (2), comprising: a first surface (3); a second surface (4), wherein the second surface (4) is arranged facing away from the first surface (3); an opening (5), wherein the opening (5) extends from the first surface (3) to the second surface (4); a gas-permeable membrane (6), which closes the opening (5) in a fluid-tight manner in the region of the first surface (3); and a cover (7), which is arranged in the region of the second surface (4) and covers at least a central region of the opening (5) when viewed in the perpendicular direction to the second surface (4).

The application provides an exhaust valve core assembly and an assembling device, and belongs to the technical field of valves. The valve core assembly comprises a bottom cover, an outer cover, a sealing gasket, a spring and a rivet. The back surface of the outer cover is provided with a groove part, the bottom cover is arranged in the groove part, the sealing gasket is arranged in abutment between the bottom cover and the outer cover, the center of the bottom cover, the outer cover and the sealing gasket is coaxially provided with a through hole, the rivet passes through the through holes of the outer cover, the sealing gasket and the bottom cover in sequence to form riveting, the front surface of the outer cover is provided with an air hole, the front surface of the outer cover is provided with a sunken part, the side of the sunken part towards the sealing gasket forms an upper annular ridge, the upper annular ridge abuts against the sealing gasket to form sealing, and a cavity is formed between the inner side of the upper annular ridge and the sealing gasket. The valve core assembly effectively solves the problem of loose sealing caused by plane contact. The upper annular ridge reduces the contact area of the sealing gasket and the outer cover, and the cavity design reduces the risk of adhesion of the two after long-term sealing, so that the opening force of the valve core is stable.

The utility model discloses a valve and a charging device. The valve comprises a driving part and a connecting part connected with the driving part. One end, far away from the connecting part, of the driving part is inwards concavely provided with a ventilation cavity extending into the connecting part. A ventilation groove communicating with the ventilation cavity is formed in the side wall of the connecting part, and a first screw joint part is arranged on the side wall of the connecting part. The valve can ensure the air exchange between the interior of the charging device and the exterior of the charging device, and ensures the sealing performance.

The fire pump comprises a motor and a pump body, the pump body is in transmission connection with the motor, the manual-automatic integrated exhaust valve is installed at the position, close to the top of the pump body, of the pump body, and the manual-automatic integrated exhaust valve comprises an exhaust valve body, an exhaust connector, an exhaust pipe and an automatic exhaust mechanism. The bottom of the exhaust valve body is communicated with the pump body through an exhaust pipe, and the exhaust connector is installed on the top of the exhaust valve body and provided with an automatic exhaust hole leading to the exhaust valve body. The automatic exhaust mechanism is installed in the exhaust valve body and comprises a floating ball and a sealing valve rod which is distributed in the vertical direction and can move up and down, the floating ball is fixed to the lower end of the sealing valve rod, a conical plug part is arranged on the sealing valve rod, and the conical plug part is used for blocking the automatic exhaust hole under the acting force of the floating ball when the water level in the exhaust valve body rises. According to the utility model, the exhaust effect can be obviously improved, the operation of the fire pump is more stable, and the working efficiency and the performance are greatly improved.

The utility model belongs to the technical field of self-dumping car braking, and particularly relates to a pin type exhaust valve which is characterized by comprising a valve casing, a lock cap, a connecting seat, an ejector rod, a sealing rod, a safety pin and a spring, the top of the valve casing is connected with the lock cap, a pin penetrating hole is formed in the lock cap, the bottom of the valve casing is connected with the connecting seat, and the sealing rod is arranged in the valve casing. An ejector rod is arranged above the sealing rod, and a safety pin penetrates through the lock cap and the ejector rod; a spring is arranged between the sealing rod and the valve shell; a sealing ring is arranged between the bottom of the sealing rod and the connecting seat; the bottom of the connecting seat is connected with a main air supply pipeline of a self-dumping car brake system; and the valve shell is provided with an exhaust port. Compared with the prior art, the automatic braking device has the advantages that during derailment, the pin type exhaust valve acts through the relative displacement between the axle and the carriage, and a braking system is triggered to achieve automatic braking; the reliability of safe operation is improved, and the response speed to derailment faults is increased.

The utility model discloses a mute exhaust valve which comprises a valve body, a liquid storage cavity and a liquid outlet communicated with the liquid storage cavity are arranged in the valve body; the output end of the liquid inlet pipe is communicated with the liquid storage cavity, and the side part is communicated with a fluid pipeline; the switch valve group is movably arranged in the liquid inlet pipe, and the liquid storage cavity is isolated from or communicated with the liquid inlet pipe; and the exhaust assembly is movably arranged in the fluid pipeline, exhausts gas in the liquid inlet pipe outwards through the fluid pipeline and can isolate the fluid pipeline from the outside. When water gradually gets close to the switch valve set along the input end of the liquid inlet pipe, gas mixed in the water is compressed, when the air pressure reaches a certain value, the exhaust assembly is opened by the gas, the gas can flow out of the fluid pipeline, and when the water acts on the exhaust assembly and the switch valve set, the exhaust assembly seals the fluid pipeline, and the fluid pipeline is closed. The liquid storage cavity and the liquid inlet pipe are communicated through the switch valve set, water enters the liquid storage cavity from the liquid inlet pipe and then is discharged from the liquid outlet, continuous and stable water supply is facilitated, and fluid noise can be greatly relieved.

The utility model provides a vacuum breaking water stop valve. The vacuum breaking water stop valve comprises a valve body and a partition plate. The partition plate divides the internal space of the valve body into an air outlet channel and an air inlet channel, an outlet of the air outlet channel is located on one side of the bottom of the valve body, and an inlet of the air inlet channel is located on the other side of the top of the valve body. A connecting channel opening for communicating the air inlet channel with the air outlet channel is formed in the partition plate; a water return hole is formed in one side, close to the bottom of the valve body, of the partition plate; a floater is arranged below the connecting channel opening, and a connecting rod penetrating through the connecting channel opening is arranged above the floater; a vacuum breaking chamber is arranged at the top of the valve body, a vent hole is formed in a shell of the vacuum breaking chamber, and a connecting rod inlet and a sealing module for sealing the connecting rod inlet are arranged at the bottom of the vacuum breaking chamber; the upper end of the connecting rod penetrates through the connecting rod inlet and is fixedly connected with the sealing module. In the using process, vacuum breaking and water stopping can be automatically and rapidly achieved, water or other liquid is effectively prevented from damaging the liquid ring pump, and therefore the reliability of vacuum water diversion equipment is improved, and the service life of the vacuum water diversion equipment is prolonged.

The utility model relates to the field of coffee machines, and discloses a coffee machine blowoff valve which comprises a blowoff valve body, and a blowoff structure used for exhausting and draining water is arranged in the blowoff valve body. The emptying structure comprises a water inlet flow channel which is arranged in the emptying valve body and used for water flow to flow in, a normally-open exhaust component which is arranged on the inner wall of the water inlet flow channel, is in an open state in a normal state and is closed when the water flow flows into the water inlet flow channel, and a normally-closed drainage component which is in a closed state in a normal state and is opened after the water flow enters the water inlet flow channel. The depth of the normally-closed drainage component arranged in the water inlet flow channel is larger than that of the normally-closed exhaust component arranged in the water inlet flow channel, the normally-open exhaust component in the mechanism is in an open state in a normal state, so that air is conveniently exhausted from the interior of the blowoff valve body, and meanwhile the normally-closed drainage component can be opened when the normally-open exhaust component is closed. And air is exhausted from the emptying valve body, so that the exhaust efficiency of the emptying valve body is improved.

A motorcycle helmet with a detachable, split-type ventilation valve assembly includes a helmet body with a mounting position. The ventilation valve assembly includes a ventilation valve mounted on the mounting position, which is connected to a mounting hole in the mounting position via a detachable component. The detachable component includes a insert post on the ventilation valve and a pin movably inserted into the insert post. The insert post has a hole extending inward from its end face in the middle, and two outwardly extending rods on either side of the hole on the end face of the insert post. The outer curvature of the two rods matches the outer curvature of the insert post, and one of the rods has a hook structure on its outer side. The detachable, split-type ventilation valve assembly design allows the ventilation valve to be connected to the mounting position on the helmet body via the detachable component. When cleaning is required, the user can easily remove the pin and move the rods to quickly remove the ventilation valve from the mounting position, effectively removing accumulated dirt and bacteria.

The utility model discloses a deflation valve for a vacuum chuck, which comprises a valve seat (1), a first deflation hole (3) used for being communicated with a gas flow channel of the vacuum chuck is arranged at the bottom of the valve seat (1), and a mounting groove (2) is arranged on one side of the valve seat (1) deviating from the gas flow channel. The flexible valve element (4) is arranged in the mounting groove (2), and a second vent hole (5) is formed in the flexible valve element (4); the limiting mechanism limits the flexible valve element (4) at the first position, and when the flexible valve element (4) is located at the first position, the first air bleed hole (3) and the second air bleed hole (5) do not coincide; and the rotating mechanism is used for rotating the flexible valve element (4) to the second position, and when the flexible valve element (4) is located at the second position, the first air bleed hole (3) and the second air bleed hole (5) coincide. When the device is used for the vacuum chuck, the situation that articles fall off due to mistaken touch when the vacuum chuck carries the articles can be avoided, property damage can be reduced, and safety is good.

The invention relates to the technical field of photoelectric pods, and discloses a breather valve for a photoelectric pod, the breather valve comprises a pod body, a breather valve assembly and a control assembly, the breather valve assembly comprises an outer valve core pipe seat, the outer valve core pipe seat is connected with the outside of the pod body, and an axial through hole of the outer valve core pipe seat is sequentially provided with an inner sealing washer, a shell seat, an outer spring and an outer spring retainer ring; a valve element shaft is matched with the axis of the shell seat in a sliding mode and penetrates through the shell seat, a sealing cover matched with the inner sealing gasket is arranged at the position, close to an upper port of the shell seat, of the upper portion of the valve element shaft, the lower portion of the valve element shaft is sleeved with an inner spring fixing seat, the inner spring fixing seat is sleeved with an inner spring, and the other end of the inner spring abuts against the shell seat. The three-position five-way middle-discharge electromagnetic valve is controlled through high frequency to enable the valve element shaft to axially vibrate at high frequency, ultrasonic waves generated through high-frequency vibration can effectively strip pollutant particles attached to the positions of the valve element shaft, the sealing cover and the like, and untight sealing caused by accumulation of the pollutant particles is prevented.

The present invention relates to a ventilation structure for a refrigerant recovery unit. To address the lack of protection for the springs of the intake and / or exhaust valves of a conventional refrigerant recovery unit when impacted by liquid refrigerant, the present invention provides the following solution. The ventilation structure for a refrigerant recovery unit includes a valve seat (1) with an air hole, a valve body (2, 2A) axially movable relative to the air hole, a compression spring (7, 7A) attached to the valve body, and a protection unit (6, 6A) mounted on the valve seat. The protection unit has an annular wall (621) surrounding the compression spring, with a predetermined distance between the compression spring and the valve seat. The region of the protection unit located between the compression spring and the valve seat forms a radial ventilation passage. The beneficial effect of the ventilation structure for a refrigerant recovery unit of the present invention is that it reduces or avoids the impact of liquid refrigerant on the compression spring due to radial airflow.

The invention belongs to the technical field of vehicle engineering, and discloses a device and method for eliminating surface wave defects of an automobile outer covering part, the device is a self-closing exhaust valve, the self-closing exhaust valve comprises a valve body, an embedded sleeve, an upper cover, an upper cover rotating shaft, an upper cover sealing ring and an upper cover counter weight, the valve body and the embedded sleeve are both hollow pipes with the upper portion and the lower portion open, and mounting threads are arranged on the outer surface of the valve body; the embedded sleeve is detachably arranged in the valve body in a sleeved mode, the upper cover is rotatably connected to the top of the valve body in a limited mode through an upper cover rotating shaft, a detachable upper cover sealing ring is arranged between the upper cover and the valve body, and the upper cover balance weight is arranged on the upper cover and is adjustable in weight. According to the method, the self-closing exhaust valve is additionally arranged on the exhaust hole of the flanging forming process die, and the wave defect generated on the surface of the automobile outer covering part is effectively eliminated by adopting a method of adjusting the installation air tightness of the self-closing exhaust valve, the free rotation state of an upper cover opening, an upper cover balance weight, an upper cover rotating shaft, the air tightness of the upper cover and the diameter of an air vent; the surface quality of the outer covering part is improved, and the stability of high-speed production is guaranteed.

The invention provides a rigidity-variable exhaust valve which comprises a base, the base comprises a bending part and a side plate assembly, the bending part comprises a first bottom plate, a second bottom plate and a side plate assembly, the first bottom plate and the second bottom plate are fixedly connected, the side plate assembly comprises a first side plate and a second side plate, the first side plate is arranged on one side of the bending part, and the second side plate is arranged on the other side of the bending part; the second side plate is arranged on the other side of the bending piece, and the rotating shaft is rotationally arranged on the side plate assembly; the valve plate is fixedly connected with the rotating shaft, and the valve plate can cover or open the through hole; the spring piece is arranged on the side, away from the first bottom plate, of the valve piece. And the adjusting assembly comprises at least two adjusting rods. According to the exhaust valve with the variable rigidity, the rigidity of the spring piece is adjusted by adjusting the positions of the first adjusting rod and the second adjusting rod in the assembly, the number and the positions of the adjusting rods of the valve body of the exhaust valve with the variable rigidity can be changed according to actual working condition requirements, and the exhaust valve is flexible and adjustable.

An explosion-proof valve and a box are provided in the application. The explosion-proof valve is configured for installing in the box, and includes a valve body (110) including a breathing passage (150), a press cover (120) and a breathing mechanism (130). The valve body is connected to the valve body, and there is a gap between the press cover and the valve body. The breathing mechanism is movably connected to the press cover, and a breathing switch (140) is formed between the breathing mechanism and the valve body. When the breathing mechanism abuts against the valve body, the breathing switch is closed, and an inside of the box is not in communication with an outside of the box. When the breathing mechanism is separated from the valve body, the breathing switch is opened, and the inside of the box is communicated with the outside of the box.

The present invention provides a gas introduction device that simplifies the structure and control while mitigating the rapid pressure increase in the depressurized chamber when it is opened to the atmosphere. [Solution] A gas introduction device 10 is attached to the atmospheric intake side of an atmospheric release valve 6 that opens a depressurization chamber 2, which is reduced to a pressure lower than atmospheric pressure, to the atmosphere, and comprises a valve body 18 that opens and closes the atmospheric intake side of the atmospheric release valve, a small amount of gas introduction section 14 whose opening area is smaller than the opening area of ​​the valve body in the fully open position and which allows gas to be introduced regardless of the position of the valve body, and a biasing mechanism 20 that biases the valve body, which is in the closed position due to the negative pressure of the depressurization chamber when the atmospheric release valve is opened, toward the fully open position.

The present invention relates to the technical field of exhaust ball valves. Disclosed is an exhaust ball valve with an internal self-cleaning function. The exhaust ball valve comprises an exhaust ball valve main body (1), wherein the exhaust valve main body (1) comprises a connection pipe (2) and an exhaust pipe (3), the exhaust pipe (3) being mounted above the connection pipe (2); a partition plate (31) is mounted inside the exhaust pipe (3), a space below the partition plate (31) is a primary filtering space (32), and a space above the partition plate (31) is a secondary filtering space (33); mounting plates (11) are mounted at the joint between the connection pipe (2) and the exhaust pipe (3), and an auxiliary cleaning assembly (4) is mounted between the mounting plates (11); a blocking assembly (5) is provided on the partition plate (31); an end cover (7) is mounted above the exhaust pipe (3), an exhaust assembly (8) and a pressure gauge are mounted on the end cover (7), and the blocking assembly (5) is connected to the end cover (7); and the auxiliary cleaning assembly (4) can clean the primary filtering space (32), and the blocking assembly (5) can block air entering the secondary filtering space (33); therefore, when in use, the device can automatically clean the inner wall of the exhaust ball valve and remove dust remaining on the inner wall.

A vent is provided herein for use in a closed container, the vent comprising at least one protective fluoropolymer layer and at least one reinforcing layer, wherein the at least one protective fluoropolymer layer at least partially penetrates into the at least one reinforcing layer, wherein the at least one protective fluoropolymer layer has a carbon dioxide (CO2) to water (H2O) selectivity of at least 600 cm3 / g at 30° C. and a CO2 permeability of at least 1,000 cm3 / (m2*24 h*atm) at 30° C. as measured using methods described herein.

A purge valve with an integrated safety function, suitable for an air-drying device. In the purge valve a purge-valve body forms a first exhaust passage for connecting an inlet line to an outlet line. A purge-valve piston is arranged inside the purge-valve body to control a flow of exhaust air through the first exhaust passage upon reception of a purge signal. The purge-valve piston comprises a through opening being configured to form a second exhaust passage for connecting the inlet line to the outlet line. A valve member is arranged in the through opening and is configured to control a flow of exhaust air through the second exhaust passage. The valve member is configured to be actuated by pressurized air when a pressure value in the inlet line exceeds a threshold actuation pressure.

The ventilation valve comprises a valve seat, a valve cover and a waterproof ventilation film, the waterproof ventilation film is fixed in the valve seat through welding, the valve cover is provided with at least two ventilation holes, a sinking groove is formed below the ventilation holes, a through hole is formed above the ventilation holes, the through hole is provided with a metal filter screen, and the metal filter screen is embedded into the sinking groove. Suspended particles in outside air are blocked through the metal filter screen, the air holes are prevented from being blocked, meanwhile, the suspended particles are prevented from being attached to the surface of the waterproof and breathable film, the waterproof and breathable film is prevented from being polluted, and the service life of the waterproof and breathable film is prolonged.

The utility model discloses an inflating and deflating device in the technical field of inflating and deflating, which comprises an air bag provided with an inflating port and a deflating port, and further comprises an air control part I mounted on the inflating port and used for controlling air to be only discharged out of the air bag from the inflating port; the second air control part is installed on the air outlet and used for controlling the air to enter the air bag only through the air outlet. The air bag type product can be inflated and deflated, the problem that the air bag type product is prone to breeding bacteria and generating peculiar smell can be solved, air in the air bag type product can be completely exhausted during deflation, and the air bag type product is convenient to store.