2490results about "Spindle sealings" patented technology

The invention belongs to the technical field of valve maintenance, and particularly relates to a lifting device for a leakage guide ring of a nuclear island gate valve. The upper end of the supporting screw rod is arranged on a valve yoke frame, the lower end of the supporting screw rod is arranged on the drawing support, the drawing support is installed on a valve rod, the half-and-half type lifting nut is installed at the position of a threaded sleeve at the bottom end of the drawing support in a spliced mode and connected with the threaded sleeve through the set screw, and the half-and-half type lifting loop is connected to the lower end of the lifting nut in a hung mode. The lower end of the lifting screw rod is screwed into the original lifting hole and the new lifting hole of the leakage guiding ring, the height of the lifting loop is adjusted in a rotating mode, the upper end of the lifting screw rod is arranged in a screw hole of the lifting loop and is screwed and fixed through a nut, and the operating handle and the rotation preventing handle are arranged in the lifting nut and operating holes in the periphery of the lifting loop respectively. And the drawing bracket is fixed by connecting the original bolt hole of the valve with the supporting screw rod. On the premise of fully considering the limited operation space, the leakage guiding ring is efficiently detached, meanwhile, the complete effect of the leakage guiding ring is guaranteed, and the leakage guiding ring can be repeatedly used.

The invention relates to a pneumatic corrugated pipe stop valve, and relates to the technical field of stop valves, the pneumatic corrugated pipe stop valve comprises a valve body, a valve cover installed on the valve body, a valve clack located in the valve body and a valve rod driving the valve clack to slide, an air cylinder is fixedly arranged above the valve cover, and a piston is arranged in the air cylinder in a sliding mode; the side face, away from the valve deck, of the air cylinder is provided with an installation opening allowing the piston to be placed in, and a cover plate for blocking the installation opening is fixedly arranged outside the air cylinder. An upper air inlet and a lower air inlet for a compressed air pipeline to be connected in are formed in the periphery of the air cylinder, a push rod is fixedly arranged on the side face, facing the valve cover, of the piston, a mounting hole for the push rod to penetrate through is formed in the air cylinder, and the outer end of the push rod is coaxially and fixedly connected with the outer end of the valve rod; a first sealing ring is embedded in the inner wall of the mounting hole, a second sealing ring is embedded in the periphery of the piston, and a third sealing ring is embedded in the side face, facing the cover plate, of the air cylinder. The sealing performance and the stability of the pneumatic corrugated pipe stop valve are remarkably improved.

The invention relates to the technical field of industrial automation and control, and discloses a top-mounted high-temperature-resistant hard sealing ball valve and a self-adaptive dynamic control system of the top-mounted high-temperature-resistant hard sealing ball valve. The system aims at solving the technical problem that due to the fact that fixed driving torque is adopted, the sealing face of the valve is excessively abraded or the risk of heat jamming exists. The system is characterized by comprising a multi-point distributed sensing subsystem, a valve dynamic control unit and an intelligent electric actuating mechanism. A hybrid torque prediction model based on physical information and data driving is arranged in the valve dynamic control unit, the optimal torque is predicted in real time through sensing data, an executing mechanism is driven to respond dynamically, and the valve dynamic control unit has the online self-learning capacity. Accurate prediction and dynamic adjustment of the valve operation torque can be achieved, overstress damage is effectively avoided, the self-adaptability and generalization ability of the system are improved, and the service life of the valve is prolonged.

The utility model discloses a self-cleaning ore pulp knife gate valve, which relates to the technical field of valves, and comprises a valve body, a valve plate, a valve rod and a driving mechanism, the valve body is provided with a medium flow channel, the valve plate is inserted in the medium flow channel, the upper end of the valve body is provided with a through groove, the upper end of the valve plate penetrates through the through groove and is connected with the valve rod, the upper end of the valve rod is connected with the driving mechanism, and the valve rod is connected with the driving mechanism. A valve seat assembly is arranged in the medium flow channel and comprises an elastic sealing ring and an elastic annular scraper, the section of the front end of the elastic sealing ring and the section of the front end of the elastic annular scraper are in an arc shape and extend in the opposite directions, and the elastic sealing ring is in sealing fit with the valve plate. When the valve plate moves up and down, the elastic annular scraper can scrape silt, particulate matter and the like attached to the surface of the valve plate, the valve plate is kept clean, the service life of the valve is prolonged, the elastic sealing ring conducts elastic sealing compensation on the sealing face, the sealing face and the valve plate are kept sealed all the time, and the sealing reliability of the valve is guaranteed.

Certain embodiments of the present disclosure relate to a gas flow valve. The gas flow valve includes a housing configured to receive a flow of gas. The gas flow valve further includes a plunger configured to move between a closed position and one or more open positions within the housing. The gas flow valve further includes a position sensor configured to measure a distance associated with a difference in position of the plunger between the closed position and the one or more open position. The gas flow valve further includes a force sensor coupled to the plunger and configured to measure a force exerted by the plunger in the closed position on a sealing surface.

A capacity control valve includes a main valve that opens and closes communication between a discharge port and a control port formed in a valve housing by movement of a rod driven by a solenoid, a CS communication passage providing communication between a control fluid supply chamber formed in the valve housing and a suction port, and an on-off valve formed by a communication passage forming member having an annular valve seat in an outer periphery of the CS communication passage and an on-off valve element biased in the valve closing direction with respect to the valve seat.

The invention relates to the technical field of fluid control and management, in particular to a multi-stage pressure and noise reduction regulating valve which is characterized in that a fluid channel is arranged in a valve body and comprises a fluid outlet and a fluid inlet; the valve seat comprises a multi-layer valve cylinder and a first opening, a first throttling hole is formed in the multi-layer valve cylinder, and the first throttling hole communicates with the fluid inlet; the valve cage is fixedly connected with the valve seat and comprises a multi-layer valve wall and a first through hole, one end of the first through hole is connected with the first open hole, and the multi-layer valve wall is provided with a second throttling hole communicated with the fluid outlet; the valve cover is fixedly connected with the valve body; the valve plug is slidably arranged in the cavity; the valve rod is fixedly connected with the valve plug and arranged in the second through hole in a sliding mode. The valve cylinders and the valve walls are each provided with three layers, the first throttling holes in every two adjacent valve cylinders are arranged in a staggered mode, and the second throttling holes in every two adjacent valve cages are arranged in a staggered mode. Through the multiple layers of valve cylinders and the staggered throttling holes in the valve wall, the frequency of bubble formation and collapse is reduced, and fluid noise and the erosion risk of equipment are reduced.

The utility model relates to the technical field of petroleum or natural gas drilling equipment, in particular to a sand-prevention fracturing flat gate valve which comprises a valve body, a valve plate, a pair of channel openings, a sand blocking ring and an elastic piece, a valve cavity is formed in the valve body, the valve plate is movably arranged in the valve cavity, annular valve seats are arranged in the valve cavity in pairs, the annular valve seats abut against the two sides of the valve plate, and the sand blocking ring abuts against the elastic piece. The elastic piece is arranged at the end, away from the annular valve seat, of the sand blocking ring, so that the end, close to the valve plate, of the annular valve seat abuts against the side face of the valve plate all the time, and sealing is formed; according to the flat gate valve, injection liquid containing sand or impurities is effectively prevented from entering the interior of the valve body or the sealing face where the annular valve seat is attached to the valve plate along a gap between the annular valve seat and the valve plate, the possibility that sand grains or impurities are deposited and deposited in the valve body is reduced, abrasion of the sand grains or the impurities to the sealing gasket is reduced, and normal use of the flat gate valve is guaranteed.

A valve on which a valve plate is arranged in a valve housing interior space of a valve housing and fixed to a shaft, in which the valve plate together with the shaft can be displaced back and forth in directions parallel to a shaft longitudinal axis between a closed position and an intermediate position, and by rotation of the shaft about the shaft longitudinal axis can be pivoted back and forth between the intermediate position and a maximum open position. A shaft leadthrough for sealing the shaft with respect to the valve housing has a bellows which can be expanded and pushed together in the directions parallel to the shaft longitudinal axis, a first bellows end of this bellows being fixed to the valve housing, and a shaft sealing ring in which the shaft is rotatably mounted, being arranged on a second bellows end.

A valve element rotor assembly of the electric valve comprises a valve shaft assembly, a valve element assembly, a first elastic piece, a second elastic piece and a gasket component, the valve shaft assembly comprises a first valve shaft through hole part, a second valve shaft through hole part and a containing part, the first elastic piece and the gasket component are located in the containing part, the valve shaft assembly further comprises a first valve shaft abutting part, a second valve shaft abutting part, a third valve shaft abutting part and a fourth valve shaft abutting part, and the first elastic piece abuts against the second valve shaft abutting part and the gasket component. The gasket component can abut against the third valve shaft abutting part; the valve element assembly is arranged on the valve shaft assembly in a penetrating mode and penetrates through the gasket component hole part, the valve element assembly comprises a first valve element abutting part, a second valve element abutting part and a third valve element abutting part, the first valve element abutting part can abut against the first valve shaft abutting part, the valve element assembly is sleeved with the second elastic piece, and the second elastic piece abuts against the fourth valve shaft abutting part and the third valve element abutting part. The second valve element abutting portion can abut against the gasket component.

A compact and lightweight two-piece valve shell (body and pressure seal bonnet) structure reduces possible leakage paths while also providing a top-side ball / stem installation / removal path (when the bonnet piece is not present) to facilitate initial valve assembly as well as subsequent inspection / removal of the ball / stem and other valve internals for conducting valve maintenance without requiring the valve body to be removed from its process connections and without removing the bracket and actuator. Sealing seats can be adjusted in overall length using fluid, vacuum, threads or cams to ease the assembly of the ball inside the body. The sealing seat adjustment can be completed with the ball inside or outside the body cavity.

The invention provides a fiber material reinforced ultrahigh-pressure direct-acting electromagnetic valve, which belongs to the technical field of electromagnetic valve design and comprises a valve body, a sealing pipe assembly, a winding body, a movable iron core assembly, a valve port sealing element, an electromagnetic coil and a magnetic conductive shell. Due to the adoption of the innovative structural design reinforced by the fiber material, the long-standing contradiction between the loading capacity and the magnetic circuit efficiency in the field of ultrahigh-pressure electromagnetic valves is skillfully solved, the overall mechanical property of the electromagnetic valve is optimized by the structure, and the magnetic circuit efficiency is guaranteed; meanwhile, the mechanical property of the movable part can be effectively enhanced due to the high-strength characteristic of the fiber material, so that the performance of the movable part is improved, the dynamic response hysteresis bottleneck is effectively overcome, and the response speed is increased; at the sealing part, the overall strength and stability of the sealing part can be enhanced through reinforcement of the fiber material, meanwhile, the sealing part can be prevented from losing efficacy due to medium corrosion through good corrosion resistance of the fiber material, the hidden danger of sealing instability in the high-pressure environment is thoroughly eliminated, and sealing reliability is guaranteed.

Shut-off valves for cryogenic fluids are disclosed herein. An example valve includes a valve body defining a flow path and a valve seat, a bonnet coupled to the valve body and defining a bonnet chamber, a plug, and a stem coupled to the plug. The stem is configured to slide to cause the plug to slide. The valve includes a spindle that includes external threads. The spindle is configured to move along a longitudinal axis of the bonnet as the spindle is rotated about the longitudinal axis via the external threads to cause the stem to slide linearly along the longitudinal axis. The valve includes a pivot ball positioned between and operatively coupled to the stem and the spindle. The pivot ball is configured to translate linear and rotational movement of the spindle into linear movement of the stem and the plug.

A pneumatic valve comprises an actuator with a movable closing element being disposed in a housing; the closing element with a tappet penetrating an actuator opening between an air chamber formed in the housing and an actuator chamber, and a plate, with a sealing element, for closing the supply opening, thereon, on that end of said tappet protruding into the air chamber, and an elastic element pressing the plate toward the actuator opening in an activated state; the actuator element configured to move, in a non-energized state, the activating element to press the tappet against a supply opening, and in an energized state to move the activating element so as not to exert force on the tappet so that the plate is pressed in the direction of the actuator opening by the elastic element. A sealing collar disposed about the tappet seals the air chamber from the actuator chamber.

An electromagnetic valve includes a flow path forming portion, and a solenoid housing. The flow path forming portion includes a first component and a second component. The solenoid housing, the first component, and the second component are arranged in this order in the axial direction. The first component is provided with a connection portion. The solenoid housing and the second component are provided with supporting portions. Each of the supporting portions includes a first lock portion. When a first end portion and a second end portion are defined on at least one of sides of the first component that is present in a cross section passing through the connection portion, the first lock portion is located on a first end portion side, and a space through which the connection portion passes is provided from the first lock portion to a second end portion side.

A valve assembly includes a valve body having a stem bore extending along a stem bore axis and a flow bore extending along a valve body axis, a bonnet coupled to the valve body via one or more fasteners, a stem extending along the stem bore axis and within the stem bore, a packing system positioned along the stem within an annulus formed between the stem and the bonnet, a spacer ring positioned axially above the packing system, and a packing gland coupled to the bonnet to axially secure at least the packing system within the annulus. The spacer ring is positioned in a non-loaded configuration within the annulus such that one or both of an outer diameter or an inner diameter of the spacer ring is separated from one or both of the stem or the bonnet via a respective gap.

The invention discloses an ultra-clean double-corrugated-pipe type corrugated pipe valve for semiconductor manufacturing. The ultra-clean double-corrugated-pipe type corrugated pipe valve comprises a valve seat, a valve body air inlet, a valve body air outlet and a valve body, wherein the valve body air inlet and the valve body air outlet are communicated with the valve seat, and the valve body is obliquely arranged on the valve seat. The valve body comprises a valve rod and a valve body, a first corrugated pipe and a second corrugated pipe are arranged between the valve rod and the valve body, the lower end of the valve rod is further connected with a sealing plug, and the sealing plug controls opening and closing of the corrugated pipe valve. According to the technical scheme, the service life of the corrugated pipe of the corrugated pipe valve can be effectively prolonged, the sealing performance and reliability are improved, and the corrugated pipe does not serve as a guide rail any more.

The utility model belongs to the technical field of valves, and particularly relates to a valve with valve rod padding evenly stressed, which comprises a valve body, a valve rod, a stuffing box, combined padding, an elastic piece and a material pressing piece, the valve rod is arranged on the valve body, and the stuffing box is arranged on the valve body and located outside the valve rod. The combined packing is arranged in the packing box; the elastic piece is arranged at the bottom of the combined filler; the material pressing piece is arranged on the valve body and used for pressing the combined packing downwards. Compared with the prior art, the valve rod packing in the valve can be pressed in two directions, so that the whole valve rod packing is stressed uniformly, the sealing performance of the valve rod packing is improved, and the service life of the valve rod packing is prolonged.

The utility model discloses a multi-sealing compensation ball valve, which relates to the technical field of ball valves, and comprises a valve body, a valve seat, a ball body, a valve rod, a shell, a transmission shaft and a handle, and the valve seat is positioned between the outer side wall of the ball body and the inner side wall of the valve body so as to seal the joint between the ball body and the valve body; the lower packing is installed between the valve body and the valve rod, the upper packing is installed between the shell and the transmission shaft, a lower sealing pair is formed between the valve rod and the lower packing, an upper sealing pair is formed between the transmission shaft and the upper packing, and an upper pre-tightening disc spring and a lower pre-tightening disc spring which apply pre-tightening force to the upper packing and the lower packing are arranged on the upper packing and the lower packing respectively; the device further comprises a ball valve installed on the shell, a cavity is formed in the ball valve, a through hole communicated with the channel is formed in one side of the shell, and one end of the ball valve is inserted into the through hole so that the cavity can be communicated with the through hole. According to the utility model, a multi-sealing structure is adopted; and meanwhile, nitrogen sealing is added, the sealing performance of the valve is guaranteed, and leakage of harmful substances is reduced.

The utility model relates to the technical field of valves, and discloses a stop valve which comprises a valve body, a valve rod, a supporting ring, a packing set, a pressing sleeve and a pressing plate. The supporting ring abuts against the first limiting step, the bottom of the filler set is supported on the supporting ring, the pressing connection section is connected to the upper portion of the filler set in a pressing mode, the guide section is sleeved with the pressing plate, during installation, the fastener penetrates through the first installation hole, the pressing plate is locked and connected to the connecting boss part, in the locking process, the pressing plate downwards extrudes the pressing sleeve, and the pressing sleeve downwards extrudes the filler set; in the locking process, the guide section guides the pressing plate to stably and horizontally descend, the guide section is supported on the inner side of the pressing plate, the pressing plate is prevented from inclining, the situation that when one or some first fasteners are locked firstly, the pressing plate inclines towards the side where the first fasteners are located, and consequently pressure application is uneven is avoided, and it is guaranteed that the pressing plate stably descends in the horizontal posture; and therefore, the pressing sleeve is ensured to uniformly apply pressure to the packing group so as to uniformly compress the packing group, and the sealing performance can be effectively ensured.

The present invention discloses a sealing mechanism for a butterfly valve body, comprising: a valve body main body, and a sealing assembly is arranged inside the valve body main body. In the present invention, the right end of the valve body main body is the water inlet, and the left end is the water outlet. At this time, the annular butterfly plate is in a closed state. When the annular butterfly plate is driven by the valve stem to open, as the annular butterfly plate rotates, it pushes the second sealing pad and the first sealing pad towards the support plate, and at the same time pushes the fixing plate to move and compresses a plurality of first springs. When the medium flows, it first passes through the support plate, and under the action of the triangular buffer rod, the medium is buffered to reduce the impact force of the medium. Then it flows to the fixing plate, and under the action of the flow splitting plate, the medium is split into multiple streams, and the impact force of the medium is buffered again. With the cooperation of the triangular buffer rod and the flow splitting plate, the impact force of the medium is split and buffered, reducing the wear of the annular sealing ring caused by the impact force and improving the sealing performance.

The invention discloses a pneumatic stop valve, belongs to the technical field of valves, and solves the problems that when the pneumatic stop valve acts once per minute at the temperature of 380 DEG C, a valve rod is oxidized and collapsed due to high-temperature filler, the valve rod is abraded by catalyst particles, the valve rod is slightly bent by 0.08 mm due to the pressure difference of 0.5 MPa, sealing and hiding of the valve rod are invalid, and closing lags. Comprising a valve body, a support installed on the valve body through a valve cover, a corrugated pipe fixedly connected into the support, a pneumatic actuator fixedly connected to the upper end of the support and a valve rod, the valve rod is connected into the corrugated pipe in a sliding mode, and the upper end of the valve rod is in transmission connection with the movable end of the pneumatic actuator. All the structures keep efficient sealing, the displacement direction of all the structures is limited, meanwhile, the displacement and strain data of the valve rod are monitored, the bending amount is calculated through multi-source data fusion for position compensation, and meanwhile the pneumatic execution module is controlled to complete S-curve optimized valve opening and closing actions.

Shut-off valves for cryogenic fluids are disclosed herein. An example valve includes a valve body defining a flow path and a valve seat, a bonnet coupled to the valve body and defining a bonnet chamber, a plug configured to slide between a closed position, and a stem coupled to the plug. The stem is configured to slide to cause the plug to slide. The valve includes a spindle that includes external threads. The spindle is configured to move along a longitudinal axis of the bonnet as the spindle is rotated about the longitudinal axis via the external threads to cause the stem to slide linearly along the longitudinal axis. The valve includes a pivot ball positioned between and operatively coupled to the stem and the spindle. The pivot ball is configured to translate linear and rotational movement of the spindle into linear movement of the stem and the plug.

The invention relates to the technical field of instrument valves, in particular to an anti-freezing petrochemical engineering valve. Connecting flanges are connected to the two ends of the valve body, closed rings are fixed to the two ends in the valve body, guide grooves are formed in the top ends and the bottom ends of the two ends in the valve body, conical pistons are slidably connected to the inner sides of the guide grooves, and the ends, away from each other, of the two conical pistons are slidably connected with the closed rings; a closing mechanism used for driving the conical piston and the closed ring to be separated or sealed is arranged on the inner side of the valve body. According to the anti-freezing petrochemical engineering valve, the closing mechanism is started to drive the conical piston to be in separation and sealing contact with the closed ring in the direction away from or close to each other, then petroleum in the valve body is effectively isolated or circulated, and the isolation and sealing effects of the petroleum are effectively improved through the arrangement of the conical piston and the closed ring; and through the arrangement of the two closed rings and the conical piston, the petroleum leakage condition is effectively prevented, and the practicability of the device is promoted.

The embodiment of the invention provides a closable adjustable cavitation pipe and an airspace engine system. The closable adjustable cavitation pipe comprises an adjustable cavitation pipe valve body, a throttling cone, a driving mechanism at the upper end of the throttling cone and a disc-shaped valve element on the outer side of the throttling cone. The inlet end on the side is communicated with the cavity of the adjustable cavitation pipe valve body through a through hole; the lower end of the throttling cone faces the outlet end of the adjustable cavitation pipe valve body, a conical structure is arranged at the lower end of the throttling cone, a throttling table is arranged in the outlet end of the adjustable cavitation pipe valve body, and the minimum caliber of the throttling table is larger than the maximum outer diameter of the conical structure; a valve seat is further fixedly connected into the adjustable cavitation pipe valve body, the top face of the valve seat is perpendicular to the axis of the throttling cone, a through hole is formed in the middle of the valve seat, and the outer diameter of the valve element is larger than the hole diameter of the through hole. The valve seat is located between the throttling table and the through hole. According to the technical scheme, a closing structure composed of the valve element and the valve seat is integrated on the adjustable cavitation pipe, reliable closing and sealing of the adjustable cavitation pipe are achieved, and the structure of an airspace engine system is simplified.

The utility model relates to the technical field of ball valves, and discloses a ball valve easy to disassemble and assemble, which comprises a first valve body, a second valve body and a ball body, the middle of the inner bottom surface of the first valve body is rotatably connected with the ball body, and a connecting mechanism is arranged at the front end of the first valve body and comprises a first fixing ring and a second fixing ring. Inner connecting blocks are fixedly connected to the periphery of the front end of the inner wall of the first valve body, inner connecting grooves are formed in the periphery of the rear end of the outer wall of the second valve body, the inner connecting grooves are connected with the inner connecting blocks in a clamped mode, and outer connecting blocks are fixedly connected to the upper end and the lower end of the outer wall of the front end of the first fixing ring. According to the check valve, the inner connecting block and the outer connecting block are connected with the inner connecting groove and the outer connecting groove in a clamped mode, the two-way threaded rod is used in cooperation to drive the clamping block to clamp the limiting block on the first fixing ring, the valve body is prevented from being split, after clamping connection of the limiting block is removed, the second valve body is rotated clockwise, the valve body can be separated, and overhauling and maintaining are convenient.

The utility model relates to the technical field of sampling valves, and discloses a fluorine-lined sampling valve, including an upper valve cover clamped on the upper part of a valve body, a valve core cover and a valve stem, a limit table, a filler, a sampling pressure plate, and a nut are arranged on the upper part of the upper valve cover. The utility model has a reasonable structure, and a lining layer is provided with a dovetail groove inside the valve body to ensure that the lining layer will not fall off under negative pressure conditions, the valve core and the valve stem are integrally sealed through a bellows, and friction debris will not be generated to pollute the medium, a limit table is provided to avoid excessive opening of the valve to damage the bellows, and the upper end of the valve stem is secondary sealed by the filler, even if the bellows is damaged, the medium will not immediately spray out and cause external leakage, the connection between the sampling joint and the sampling bottle adopts an inner convex design, and the adhered liquid falls into the bottle quickly here after the sampling is completed, avoiding the dripping of the medium after the sampling bottle is removed, and the L-shaped exhaust hole is provided inside the sampling joint, and the medium enters the sampling bottle during the sampling process, and the internal air is discharged through the L-shaped exhaust hole.

The application relates to a rotary valve, in particular a multi-way regulating valve, with a housing, which has at least one inlet connection and at least one outlet connection for a liquid and / or gaseous medium, with at least one valve element, which is rotatably mounted in the housing between the connections in order to set at least one desired flow cross-section, and with a control shaft, which is non-rotatably connected to the valve element, which control shaft is led out of the housing with a coupling end, through an opening in a housing wall of the housing, wherein the control shaft has a radial projection, which has an axial stop for making axial contact with an annular sealing protrusion of the housing wall, and with at least one sealing element acting between the control shaft and the housing. It is provided that the annular projection of the control shaft has at least one axial recess on the end face thereof facing the housing wall, which axial recess extends over a limited circumferential section of the end face to the radial outer edge of the annular projection, and that a chamber is formed between the annular projection, the control shaft, the housing wall, and the sealing projection, in which chamber the sealing element is arranged.

The utility model relates to a clearance valve sealing structure of a lithium battery coating machine, which comprises a clearance valve arranged in a coating cylinder body, the clearance valve comprises a V-shaped gasket group, a rubber mat, a clearance valve connecting rod and a connecting rod lock sleeve, the V-shaped gasket group is sleeved on the clearance valve connecting rod and is screwed with the clearance valve connecting rod through the connecting rod lock sleeve, the V-shaped gasket at the top end is provided with the rubber mat, and the rubber mat is sleeved on the clearance valve connecting rod through the connecting rod lock sleeve. And the upper part of the rubber mat is connected with the gap valve cylinder body to form an integral gap valve sealing structure. Through the design of a novel sealing structure, the problems of material leakage and locking in the movement process of the connecting rod and the problem of material leakage in the operation process are solved, installation is easy and convenient, adjustment is not needed, and the service life of gap valve consumables is prolonged.