30 results about "Return function" patented technology

An automatic stone arrangement method including: (1) a stone arrangement simulation environment is built; an action space and a return function are designed based on rules that location of parts must be inside raw materials, the parts must not overlap with each other, and utilization of the raw materials is maximized; (2) a PPO-Clip algorithm model including an Actor-Critic network is constructed; both Actor neural network and Critic neural network are trained at the same time in an Actor-Critic algorithm; (3) based on a new production order of stone parts, images, which are obtained through preprocessing a part image and a raw material image corresponding to the new production order, are used as an input to a trained PPO-Clip algorithm model; and action instruction for arranging the parts are outputted to complete an automatic arrangement task under the new production order.

The utility model discloses a kind of duplex ball valves with non-return function, belong to ball valve technical field, including duplex ball valve body, one end of the duplex ball valve body is equipped with non-return pipe by bolt, the outside of the non-return pipe is provided with protection mechanism, the outside of the non-return pipe is provided with moving groove, the inside of the non-return pipe is provided with expansion tank, the inner chamber of the non-return pipe is provided with rear conical plug, the inner chamber of the moving groove is slidably connected with movable ring. In the utility model, when the inside of non-return pipe flows fluid, fluid pushes conical plug post and the inner wall of rear conical plug separate to make fluid flow, when the inside of non-return pipe does not flow fluid, the elastic force of spring is used to drive conical plug post reset, so that conical plug post is plugged to the inner chamber of non-return pipe, avoid fluid reflux, in addition, spring is supported by first fixed column and second fixed column and is packaged, spring can be replaced, and practicality is good.

The utility model relates to the technical field of valve ball bodies, and provides a valve ball body with a non-return function, which comprises a ball body part, a cavity is arranged in the ball body part, a non-return device is arranged in the cavity, and through the arrangement of a water retaining assembly and a shielding assembly, when water flow enters the ball body part through a water inlet hole, the water flow is blocked by the water retaining assembly. When the water flow on one side of the water inlet hole continuously impacts the impact cylinder, the water flow impacts the impact cylinder and extrudes the spring, and the spring shrinks after bearing the maximum elastic property to drive the impact cylinder to move so as to expose the water passing groove, so that the water flow conveniently enters the cavity, is discharged from the water outlet groove and is finally discharged from the water outlet hole; and the impact cylinder is restored under the elastic performance of the spring, the impact cylinder is driven to return to the position of the water passing groove, the non-return function is achieved after the rubber waterproof ring is clamped to the position of the water passing groove, backflow water can return to the interior of the cavity through the backflow hole to be stored, and the non-return function is achieved.

The utility model relates to a ball body of a ball valve with a non-return function, which comprises a valve body shell, a valve body ball core arranged in the valve body shell, a water through hole arranged in the valve body ball core, a spherical cavity arranged on the inner wall of the water through hole, a valve body shaft arranged at the top end of the valve body ball core and penetrating through the valve body shell and a non-return ball core. The non-return ball core is arranged in the ball body cavity, a through hole is formed in the non-return ball core, a non-return assembly is arranged in the through hole, and a non-return shaft is arranged at the top end of the non-return ball core and penetrates through the valve body shaft. The utility model relates to the technical field of ball check valves. According to the ball body of the ball valve with the non-return function, the non-return ball core can be driven to rotate in the valve body ball core by rotating the non-return shaft, so that the orientation of the non-return assembly arranged in the non-return ball core is changed, the purpose of adjusting the non-return direction is achieved, and the practicability of the ball valve can be effectively improved.

The utility model discloses a meter front valve with a non-return function, which relates to the technical field of non-return valves and comprises a valve body, the valve body comprises a valve seat, an output pipe, a main valve chamber, an auxiliary valve chamber and an input pipe, the output pipe is fixed and penetrates through the middle position of the valve seat, the main valve chamber is communicated with one end, far away from the valve seat, of the output pipe, the auxiliary valve chamber is arranged on the peripheral side of the main valve chamber, and the input pipe is communicated with the auxiliary valve chamber. The discharge hole is formed in the lower part of the auxiliary valve chamber; the non-return assembly is arranged in the auxiliary valve chamber and comprises an adjusting nut head installed at one end of the auxiliary valve chamber in a threaded fit mode, a guide rod rotationally arranged in the middle of the inner side of the adjusting nut head, a sealing circular plate matched with the other end of the guide rod in a telescopic mode and a splitter blade fixed to the side face of the sealing circular plate. The check assembly arranged in the valve body effectively prevents medium backflow, the sealing circular plate can automatically move and automatically block the connecting position of the input pipe under the condition of strong convection, and the position of the sealing circular plate can be controlled by manually adjusting the nut head under the condition of weak backflow, so that the backflow prevention effect is ensured.

The diaphragm valve with the non-return function comprises a valve seat, a diaphragm assembly and an electromagnetic driving assembly, the valve seat is at least provided with a first flow path, a second flow path, a first valve cavity and a second valve cavity, and the first valve cavity is located above the first flow path and the second flow path and communicated with the first flow path; the second valve cavity is located below the first flow path and the second flow path and communicates with the first flow path and the second flow path. The diaphragm assembly comprises a first diaphragm and a second diaphragm which are located in the first valve cavity and the second valve cavity correspondingly, the first diaphragm and the second diaphragm are connected through a connecting piece to move synchronously, and the second diaphragm comprises a second valve plug used for opening and closing the second flow path. The electromagnetic driving assembly is fixed above the valve seat and used for driving the connecting piece to move up and down. According to the utility model, the influence on the fluid precision caused by the pump action volume can be effectively reduced.

The invention relates to data processing equipment and a data processing method, and the data processing equipment comprises the steps: obtaining a target parameter, a processing function and a return function corresponding to first data under the condition that it is verified that a user has a processing authority for the first data; based on the target parameter, the processing function and the return function, calling a data processing module to process the first data to obtain processing result information; based on the processing result information, prompt information is output, and the prompt information is used for indicating that data processing succeeds; the data processing module is configured to obtain second data in the first data based on the target parameter; decrypting the second data through a first decryption algorithm based on the first secret key to obtain decrypted second data; performing data processing on the decrypted second data based on a processing function to obtain third data; based on the second secret key, encrypting the third data through a first encryption algorithm to obtain encrypted third data; and calling a return function to return processing result information.

The invention relates to an over-flow valve with a resetting function, which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve body comprises an air inlet part, an air outlet part and a pressure relief part; a pressure relief valve provided to the pressure relief unit; the superflow device is arranged on the air inlet part, the superflow device comprises a flow stopping piece, and the flow stopping piece can block the air outlet when bearing fluid thrust exceeding a set value; the reset device is arranged on the pressure release valve and comprises a push rod, when the push rod is stressed to move, one end of the push rod moves towards the position where the flow stopping piece blocks the air outlet, and one end of the push rod of the pressure release valve can correspond to the position where the flow stopping piece blocks the air outlet, so that after abnormity is eliminated, the flow stopping piece can be stopped by operating the push rod to push the flow stopping piece, and the pressure release valve can be reset. When a user wants to remove the blocking of the superflow device to the fluid, the user only needs to operate the reset device.

The utility model discloses a ventilation filtering system air duct structure with a non-return function, and belongs to the technical field of ventilation filtering systems. Comprising a main body and a connecting mechanism, the main body comprises a connecting base, an adjusting box is inserted into the connecting base, sliding grooves are formed in the two sides of the adjusting box, a pair of gates is slidably installed between the pair of sliding grooves, the two opposite faces of the pair of gates abut against each other, and connecting rods are installed at one ends of the pair of gates; movable grooves are formed in the upper end and the lower end of the adjusting box, one end of the connecting rod is in sliding connection with the movable grooves, the connecting mechanism comprises a pair of connecting pipes, the connecting pipes are arranged on the two sides of a connecting base respectively, and a hot-wire type wind speed sensor is installed on one side of the upper end of the interior of one connecting pipe. The monitoring end of the hot wire type wind speed sensor faces outwards; the practicability of the air duct structure of the ventilation filtering system can be effectively improved, and the air duct structure has high practical value.

The invention discloses a streaming result return method and device based on a MyBatis framework, which are applied to the technical field of computers, and the method comprises the following steps: if a current SQL operation is a query operation, checking whether a return value type of a Mapper interface method of the MyBatis framework is a streaming type of a Java standard library; and if yes, acquiring a vernier object, converting the vernier object into a stream object by using a Java standard library, and registering and closing a callback function on the stream object. According to the method, the MyBatis framework is expanded, so that the MyBatis framework has a streaming result return function, the development workload is reduced, and meanwhile, the performance is ensured to be consistent with that of the original MyBatis framework; the implementation function of the MyBatis core code is not modified, so that the introduction risk is avoided, and the original function is not influenced; and the cursor object is closed and bound with the stream object, so that a user does not need to manually manage resources, and resource leakage is avoided.

The invention discloses a wear-resistant water distribution head with a non-return function, and relates to the technology of water distribution heads. Comprising a water distribution shell, the water distribution shell is provided with a sealing part and a liquid inlet, the sealing part is connected with a sealing disc in a sealing and sliding mode, the sealing disc is provided with a constant pressure hole, the sealing disc is fixedly connected with a sliding rod in spline connection with the water distribution shell, the water distribution shell is provided with a sealing sleeve, and the end, away from the sealing disc, of the sliding rod is fixedly connected with a supporting plate. A tension spring is fixedly connected between the supporting plate and the sealing sleeve, water distribution grooves which are symmetrically distributed at equal intervals are formed in the water distribution shell, and sealing pieces which are symmetrically distributed at equal intervals are slidably connected into the water distribution shell in a limited mode. The circulating area of the water distribution tank is adjusted through the sealing piece, so that no matter how the pressure of a solution B in the water distribution shell changes, the spraying range of the solution B is always equal, it is guaranteed that the solution B and the solution A are fully mixed, and after liquid feeding is stopped, the sealing piece blocks the water distribution tank, and the non-return function is achieved.

The utility model discloses a kind of with quick return function's belt storage device, belong to packing belt conveying device field, and belt storage device is provided by setting return device, provides vertical tension traction under pulley set return when packing belt slack, make the packing belt that slack recovers tight, with can quickly and effectively absorb excess packing belt and make it recover tight state, ensure the stable, continuous conveying of packing belt, improve packing efficiency and stability, avoid the advantages of equipment failure.

The mute electromagnetic valve with the non-return function comprises a framework body, a movable iron core body and a static iron core body, the check valve assembly is arranged, the air inlet pressure is reduced through an air flow channel, electromagnetic force needed by the movable iron core body is reduced, and then the service life of the electromagnetic valve is prolonged; meanwhile, the internal pressure of the first cavity is always higher than that of the second cavity, so that the impact energy is reduced when the movable iron core body recovers, and the recovery noise is inhibited; the elastic element provides small buffering force when the movable iron core body moves, magnetic attraction force needed when the static iron core body and the movable iron core body are attracted and sealed in a matched mode is reduced, impact energy is reduced during sealing collision, and attraction noise is restrained. The check valve assembly is integrated in the inner cavity of the static iron core body, an external check valve is omitted, and the structure is simplified; and the elastic element simultaneously drives the movable iron core body to block the air outlet flow channel and pushes the check valve assembly to seal the first air inlet, so that a bidirectional effect on an air path is achieved.

A method for determining a binary function entry includes distinguishing a text section and an exception handling section by parsing a binary code, disassembling the text section to determine an address of an end branch instruction, an address of a direct call target, and an address of a direct jump target, determining an indirect return function call address from the addresses of the end branch instructions, determining an exception handling block address from the addresses of the end branch instructions, excluding the indirect return function call address and the exception handling block address from the addresses of the end branch instructions and determining a tail call corresponding to the binary function entry from the addresses of the direct jump targets.

The present invention discloses a bracket with universal adjustment and automatic return function, which includes a first connecting member. The first connecting member includes a connecting portion and a rotating portion, and the connecting portion is connected to the rotating portion; a second connecting member, a first through hole matching with the rotating portion is provided in the middle of the second connecting member, a second through hole is provided on the outer wall of the second connecting member, and the first through hole and the second through hole are communicated, and the rotating portion is arranged in the first through hole in a left-right swingable manner; at least two tripod legs, each tripod leg is respectively installed on both sides of the second connecting member; a first locking assembly, the first locking assembly is movably arranged in the second through hole; an interface assembly, the interface assembly is connected to the first connecting member through the connecting portion, and a second locking assembly is provided on the outer wall of the interface assembly. In the present invention, the user swings the article assembly left and right to adjust the angle, and the article assembly is fixed at this angle by locking the first locking assembly, thereby solving the problem that the angle adjustment and positioning of the article assembly are restricted.

The utility model provides a ball valve with a non-return function. The ball valve with the non-return function comprises a valve body, flange connecting pipes are fixedly connected to the two ends of the valve body, a ball groove is formed in the valve body, a round ball valve is rotationally installed in the ball groove, and a non-return mechanism is arranged in the round ball valve; the non-return mechanism comprises a second flow hole, the second flow hole is formed in the round ball valve, a fixed rod is fixedly installed in the second flow hole, a movable rod penetrates through the fixed rod in a sliding mode, and a push plate is fixedly installed at one end of the movable rod. According to the ball valve with the non-return function, the non-return mechanism is arranged, so that when fluid in the valve body stops being supplied continuously, flowing thrust generated by the fluid is smaller than the elastic force of the spring, the spring releases the elastic force to abut against the push plate to move, and then the push plate drives the sealing plug to move into the sealing ring through the movable rod to conduct blocking and sealing; and fluid backflow is effectively prevented.

The utility model relates to the technical field of valves, and discloses an emergency cut-off valve with a non-return function, which comprises an electric valve, a first pipe connecting port and a second pipe connecting port are respectively integrally formed on two sides of the electric valve, an electric actuator is mounted at the top of the electric valve, a handle is mounted on the electric actuator, and a valve clack is connected to the bottom of the electric actuator. The valve clack is controlled by the electric actuator, the valve clack is arranged in the electric valve, an automatic module is installed on one side of the top of the electric actuator, a temperature sensing switch is installed in the automatic module, the temperature sensing switch is electrically connected with the electric actuator, the electric actuator is controlled by the temperature sensing switch, and a check plate is rotationally connected into the electric valve. According to the emergency cut-off valve with the non-return function, by arranging the temperature sensing switch and the toxic gas sensing switch, the cut-off valve can be automatically controlled, the emergency cut-off valve adapts to different operation scenes, and safety is ensured; and the signal transmission module is arranged to receive a remote control signal, so that remote control of the emergency cut-off valve is realized, and the operation convenience is improved.

The utility model relates to a vacuum valve with a non-return function, which comprises a valve body, a valve seat and a valve cover, a vacuum valve inlet is arranged at the outer end of the valve seat, a vacuum valve outlet is arranged on one side of the valve body, a valve rod is arranged in the valve body, the valve rod is arranged between a non-return valve core and a piston, a return spring is arranged between the piston and the valve cover, one end of the valve rod is inserted into an inner hole of the non-return valve core, and the other end of the valve rod is inserted into an outer hole of the non-return valve core. A gap exists between an inner hole of the check valve element and the outer circle of the valve rod, and a check spring is arranged between the check valve element and the valve body. The non-return function is added, oil return is prevented, and pollution of lubricating oil to a customer vacuum system is avoided; after the non-return function is added, oil loss is avoided, and the fault of oil shortage of a main engine cannot be caused; the check valve core is simpler to mount and dismount, and the vacuum valve is more convenient and quicker to maintain in the subsequent whole machine; and no part (especially a non-return spring) falls into the machine head in the dismounting process.

The utility model relates to an anti-vortex single-stage pump with a non-return function. The anti-vortex single-stage pump is characterized by comprising a connecting cover, a motor, a pump body, an impeller, a non-return valve and a sensor, the motor is fixedly mounted at the top of the connecting cover; the pump body is fixedly installed at the bottom of the connecting cover and horizontally arranged, a water inlet and a water outlet are formed in the two ends of the pump body respectively, and a vertical anti-vortex plate is fixed to the position, located at the water inlet of the impeller, in the pump body. The impeller is arranged in the pump body and is fixedly connected with an output shaft of the motor; the check valve is fixedly mounted in the water inlet of the pump body; and the sensor is fixed in the connecting cover. The check valve is fixedly installed in the water inlet of the pump body, the sensor is fixed in the connecting cover and integrally arranged in a pump body unit, the size of a water pump system is reduced, meanwhile, fault nodes are reduced, the vertical vortex prevention plate is fixed to the position, located at the water inlet of the impeller, in the pump body, and the vortex prevention plate is not prone to falling off. The anti-vortex plate can prevent the situation that pre-rotation is generated, vortex is formed, and the unit efficiency and the net positive suction head are affected.

The embodiment of the invention discloses a data return method and device, computing equipment, a storage medium and a product, and the method comprises the steps: responding to a return strategy obtaining request triggered and sent by a first client according to a conversion event, and obtaining business data of an advertisement putting business corresponding to the first client; determining a corresponding target return strategy according to the service data; and according to the target return strategy, performing return processing on the conversion data of the conversion event. According to the method and the device, the corresponding target return strategy can be conveniently and accurately determined according to the service data, whether return is carried out through the client attribution SDK return channel or the server API return channel is determined according to the target return strategy, a double-end return function is realized, respective advantages of double-end return are integrated, and a return mode can be flexibly set and switched.

The utility model discloses a valve with a non-return function, and belongs to the technical field of valves. The valve comprises a valve body; the valve disc is arranged on the inner side of the valve body, and the valve disc is used for ensuring the non-return effect of the valve body; the two ball valves are symmetrically arranged on the inner side of the valve body and used for controlling flowing of media on the two sides of the valve body, due to the fact that the two ball valves are adopted and used for controlling flowing of the media on the two sides of the interior of the valve body, the media can be prevented from flowing into the valve body by closing the two ball valves in the overhauling process, and the service life of the valve body is prolonged. Therefore, the problems that the valve needs to be detached for maintenance and a large amount of residual media in the pipeline need to be emptied during valve maintenance are effectively solved, and the technical effects that the valve maintenance steps are simplified, and medium waste is reduced are achieved.

The utility model provides a drain valve with a non-return function. The drain valve with the non-return function comprises a drain valve shell, a valve element and a valve element, the non-return shell is fixedly connected to one end of the drain valve shell, a penetrating opening is formed in the position, close to one end, of the top of the non-return shell, a sealing cover is installed at the position, close to one end, of the top of the non-return shell, a sealing plug is fixedly connected to the bottom of the sealing cover, and a connector is installed at the bottom of the sealing plug through a spring. A non-return plate is fixedly connected to the bottom of the connector, a supporting ring is installed at the position, close to one end, of the interior of the non-return shell, and a second butt joint pipe is fixedly connected to the other end of the non-return shell. According to the drain valve with the non-return function, the non-return function of the drain valve is added through the structure, and the drain valve is installed on a drain pipeline of a clear water tank so that sewage can be prevented from flowing back to pollute the clear water tank in the sewage treatment process.

The utility model discloses a throw material device and silo with automatic return function, belongs to the field of silo, has solved the return operation of throw material pipe and is more complex, the problem of lower efficiency, and the technical scheme of solving this problem mainly includes base, rotating platform and throw material pipe, and the throw material device still includes controller, first sensor and second sensor, and the rotating platform is installed with the detection board with the sliding slot, and the first sensor is equipped with the pin shaft, and the controller determines the rotation angle of rotating platform according to the lift distance of pin shaft, and the second sensor is rotatably equipped with first pivot, and the throw material pipe is connected with first pivot through first connecting rod assembly, and the throw material pipe swings up and down and drives first pivot to rotate, and the controller determines the swing angle of throw material pipe according to the rotation angle of first pivot, and the controller calibrates the initial position of rotating platform and throw material pipe through first sensor and second sensor. The utility model mainly makes controller can directly control throw material pipe to return to the initial position.

The utility model discloses a zipper head with a non-return function, which comprises a zipper head base, the top of the zipper head base is fixedly connected with a fixing rod, the top of the fixing rod is fixedly connected with a zipper head top seat, the top of the zipper head top seat is fixedly connected with a supporting rod, the outer wall of the supporting rod is movably connected with a pulling piece, and the outer wall of the pulling piece is fixedly connected with a zipper head. A sliding groove is formed in the inner wall of the pulling piece, a first magnetic block is fixedly connected to the outer wall of the pulling piece, a second magnetic block is fixedly connected to the inner wall of the supporting rod, a through groove is formed in the inner wall of the zipper head top seat, and a limiting block is movably connected to the inner wall of the through groove. And the movable block makes contact with zipper teeth, the zipper teeth are limited, so that the zipper teeth cannot slide over the zipper head, the non-return function is achieved, and the problems that the zipper slides accidentally, and the zipper is opened accidentally due to locking are solved.

The utility model relates to the technical field of gate valves, and discloses a gate valve with a non-return function, which comprises a gate valve body, and a control part for adjusting the non-return direction is arranged on the surface of the gate valve body. According to the gate valve with the non-return function, the pressing plate is rotated to drive the pressing rod to rotate, the gear shaft penetrates through the pressing rod so that the pressing rod can move up and down along the gear shaft, the connecting ring can be driven to rotate with the rotating shaft as the center through the gear shaft and the connecting column when the pressing rod rotates, and the support can rotate along with the connecting ring; when the pressing rod rotates by a half circle, the pressing plate is loosened, the sealing strip is embedded into the interior of the connecting pipe again, and therefore the conical baffle conducts one-way non-return on the left side of the connecting pipe; the non-return direction can be changed without disassembling the connecting pipe, operation is easy, and the non-return device can be suitable for being used by different devices.

Aspects of the disclosure are directed to reduction of data transfer overhead. In accordance with one aspect, increment a function call counter for an executed function call; decrement the function call counter for an executed return from function call; infer the indirect branch address based on a function call counter value and when a cumulative count of received executed atoms indicates a return from function call has been executed; oversaturate the function call counter at a maximum counter value if the function call counter contains the maximum counter value and a subsequent function call is executed; and undersaturate the function call counter at a minimum counter value if the function call counter contains the minimum counter value and a subsequent return from function call is executed.

The utility model relates to the technical field of ball valves, and discloses a ball valve with a non-return function, which comprises a valve body, a ball body is arranged in the valve body, a through hole is arranged on the outer wall of the ball body, the outer wall of the ball body is fixedly connected with a valve rod, and one end of the valve rod far away from the ball body is fixedly connected with a handle. A sealing ring is fixedly connected to the inner wall of the valve body and movably connected with the ball body, and a non-return assembly is arranged on the inner wall of the valve body. According to the ball valve with the non-return function, liquid pushes the non-return block, so that the non-return block is not in contact with the inner wall of the limiting ring, the liquid flows through a gap between the non-return block and the limiting ring, when the liquid flows back, the liquid pushes the non-return block to slide leftwards, then the non-return block is in contact with the inner wall of the limiting ring, and the liquid cannot continuously flow leftwards; non-return of the valve body is achieved, one-way flowing of a pipeline system is guaranteed, operation stability is improved, and the valve is safer and more durable.

The utility model provides a quick interface with check function, including a conversion interface, the outer wall of conversion interface is equipped with the external thread joint of fixed on the pipeline, the inner wall of conversion interface is equipped with the internal thread joint of connecting external accessory, the central sleeve of conversion interface is equipped with a check valve core, the outer wall end of check valve core is equipped with a limit slot of circumferential arrangement, is inlayed with first sealing ring in limit slot, check valve core passes through conversion interface, and first sealing ring is with the bottom of conversion interface and is in abutment, still be equipped with spring between check valve core and conversion interface, be equipped with a through -going channel on check valve core, the radial direction of channel is opened along check valve core, and the above of channel is located in limit slot, is equipped with second sealing ring below the head of conversion interface. The utility model discloses a sealing ring and channel are equipped with check valve core, when not installing external function accessory, sealing ring blocks the lower end import, guarantees that medium will not flow out, when installing external accessory, check valve core is pushed down after.

An automatic stone arrangement method including: (1) a stone arrangement simulation environment is built; an action space and a return function are designed based on rules that location of parts must be inside raw materials, the parts must not overlap with each other, and utilization of the raw materials is maximized; (2) a PPO-Clip algorithm model including an Actor-Critic network is constructed; both Actor neural network and Critic neural network are trained at the same time in an Actor-Critic algorithm; (3) based on a new production order of stone parts, images, which are obtained through preprocessing a part image and a raw material image corresponding to the new production order, are used as an input to a trained PPO-Clip algorithm model; and action instruction for arranging the parts are outputted to complete an automatic arrangement task under the new production order.

The utility model relates to the technical field of stop valves, and discloses a stop valve with a non-return function, which comprises a valve body, a valve seat is arranged in the valve body, a channel is arranged in the middle of the valve seat, a sleeve is arranged in the channel, a gasket is arranged at the top end of the sleeve, a sealing gasket is arranged at the bottom end of the gasket, and the valve seat is arranged in the valve body. The gasket is fixedly connected with the top end of the valve seat through a screw, and a fluid non-return assembly for preventing fluid from flowing back is arranged in the sleeve. The channel can be opened and closed through the opening and closing assembly, the valve body can be opened and closed, after the channel is opened, fluid can flow in one direction through the fluid non-return assembly, backflow of the fluid is avoided, the fluid non-return assembly and the opening and closing assembly are located on the same vertical plane and fixed to the valve seat, after the valve deck is disassembled, the fluid non-return assembly can be assembled and disassembled, and therefore the valve deck can be assembled and disassembled conveniently. And the maintenance is convenient after damage.