3654results about "Spindle sealings" patented technology

In some implementations, an apparatus includes a curved portion of a storage tank having an exterior surface, having an interior surface and having a defect, the apparatus also includes a steel patch positioned over the curved portion of a storage tank, a plurality of studs and nuts positioned near an outer perimeter of the steel patch, in which the plurality of studs being friction welded to the exterior surface of the curved portion of a storage tank.

A pneumatic valve is proposed, comprising a fluid supply port (P), a fluid outlet port (A), and a fluid drain port (R), a valve chamber (14) with a fluid supply port (FZ) connected to the fluid supply port (P), a fluid outlet port (VH) connected to the fluid outlet port (A), and a trigger port (VT) connected to an actuator chamber (15) of the valve, which includes the fluid drain port (R), an actuator (16) which, in the unactuated state of the actuator (16), presses a sealing element (E) against the trigger port (VT) and, in the actuated state of the actuator (16), releases the trigger port (VT), and a diaphragm (M) which divides the valve chamber (14) into two areas, a first area (1) being connected to the trigger port (VZ) and a second area (2) being connected to the fluid outlet port (VH), wherein the diaphragm (M) is connected to a The plunger (S) is connected,which is pressed against the fluid drain opening (VH) by a spring force in the unactuated state and releases the fluid drain opening (VH) in the actuated state of the actuator (16), wherein the diaphragm (M) has at least one through-opening (D) through which fluid can flow from the first region (1) to the second region (2), wherein the through-opening (D) has a smaller cross-section than the trigger opening (VT).

The invention belongs to the technical field of valves, and particularly relates to a pneumatic on-off and back-suction integrated valve for quantitative gluing of semiconductors and a working method thereof.The pneumatic on-off and back-suction integrated valve for quantitative gluing of semiconductors comprises a valve body, a back-suction diaphragm and an on-off diaphragm are arranged above and below a flow channel respectively, and a back-suction diaphragm and a back-suction diaphragm are arranged above and below the flow channel respectively; the lower cavity bottom plate is connected with the lower end of the valve body, a lower piston connected with the on-off diaphragm is arranged in the lower cavity bottom plate, and the lower piston drives the on-off diaphragm to ascend through elastic force so as to cut off the flow channel; and the air cylinder body is connected with the upper end part of the valve body, and an upper piston connected with the back-suction diaphragm is arranged in the air cylinder body. And the lower piston descends to squeeze gas in the cavity below the lower piston into the annular cavity below the on-off diaphragm, so that the on-off diaphragm is buffered, and the impact force borne by the on-off diaphragm is reduced.

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 provides a high-temperature-resistant and high-pressure-resistant chemical pipeline corrugated pipe sealing ball valve and relates to the field of valves, the high-temperature-resistant and high-pressure-resistant chemical pipeline corrugated pipe sealing ball valve comprises a valve body, a valve seat assembly, a ball body and a valve rod, an upper valve cover is arranged above the valve body, a first inlet and a first outlet are formed in the valve body in the axial direction, and a first through hole is formed in the ball body; the first inlet, the first through hole and the first outlet form a medium flow channel, a first cooling cavity is formed in the valve body corresponding to the lower end of the ball body, a second cooling cavity is formed in the valve body corresponding to the valve seat assembly, a third cooling cavity is formed in the upper valve cover in the axial direction of the valve rod, and a communicating pipeline is arranged between the second cooling cavity and the third cooling cavity. The communicating pipeline is provided with a liquid inlet connector, the communicating pipeline, the first cooling cavity, the second cooling cavity and the third cooling cavity are communicated to form a cooling flow channel, and the cooling flow channel is not communicated with the medium flow channel. The ball valve is provided with the cooling flow channel, so that the ball valve can play a self-compensation function of the corrugated pipe valve seat and can be effectively protected from being damaged, and the sealing performance of the valve rod and the upper valve cover is good.

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.

The anti-scouring stop valve comprises a valve body, a valve rod, a valve clack and a valve seat, an inlet channel, a middle cavity and an outlet channel which are connected are sequentially arranged in the valve body, a shaft hole communicated with the middle cavity is formed in the upper portion of the valve body, the valve rod penetrates through the shaft hole and extends into the middle cavity, and the valve clack is arranged at the inner end of the valve rod. The valve seat is mounted at the junction of the middle cavity and the outlet channel; the packing pressing plate, the packing pressing sleeve, the sealing packing, the packing pad and the sleeve are sequentially arranged on the periphery of the valve rod in a sleeving mode from top to bottom, the packing pressing plate is connected with the valve body through a bolt, the sealing packing and the packing pad are arranged in the shaft hole, the sleeve is arranged in the middle cavity, and the lower end of the sleeve abuts against the upper end of the valve seat. The outer periphery of the valve clack is attached to the inner periphery of the sleeve, and a plurality of passing openings are formed in the side portion of the sleeve in a penetrating mode. The anti-scouring capacity of the sealing surfaces of the valve clack and the valve seat is improved by reducing the flow speed of a medium reaching the sealing surfaces of the valve seat, so that the service life of the valve is prolonged.

A low-temperature ball valve packing sealing structure and a low-temperature ball valve comprise a valve rod heightening support arranged on the outer side of a valve rod, a packing box is arranged on the valve rod heightening support, packing is arranged in the packing box, and the low-temperature ball valve packing sealing structure further comprises a freezing structure arranged in the packing box at the bottom of the packing. The freezing structure can be frozen and expanded when making contact with a low-temperature medium leaked due to failure of the lip-shaped sealing ring, the packing is pushed to be further pre-tightened and sealed, by means of the freezing structure, when the lip-shaped sealing ring is intact, the graphite packing can still play a conventional sealing role, and the valve can also pass various fireproof tests; meanwhile, the operation torque of the valve cannot be increased for the valve, any performance of the valve cannot be affected by the freezing structure, and when the lip-shaped sealing ring loses efficacy and leaks, the freezing structure can freeze and expand when making contact with a low-temperature medium, the filler is pushed to be further pre-tightened and sealed, the sealing force is automatically increased, the filler can be automatically pre-warned, and sealing is enhanced; and the process does not need manual intervention.

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.

The invention relates to the technical field of butterfly valves, in particular to a butterfly valve with a self-cleaning function, which comprises a valve body, a rotary handle, a valve rod and a butterfly plate and further comprises a cleaning ring, the cleaning ring coaxially slides in the valve body, and the outer side of the cleaning ring abuts against the inner wall of the valve body. A reciprocating pulling mechanism is arranged in the side wall of the valve body and is in driving connection with the cleaning ring; the butterfly valve has the beneficial effects that the cleaning ring is slidably mounted in the valve body and is in driving connection with the impeller on the opened butterfly plate through the reciprocating pulling mechanism in the side wall of the valve body, after the butterfly plate is opened, liquid flowing through the valve body impacts the impeller to rotate, the impeller drives the reciprocating pulling mechanism to operate when rotating, and the cleaning ring is driven to rotate; the reciprocating pulling mechanism drives the cleaning ring to slide in a reciprocating mode to clean the inner wall of the valve body, the cleaning ring can continuously move in a reciprocating mode when liquid flows through the valve body, the inner wall of the valve body is cleaned, and thorough cleaning is guaranteed.

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.

The stop valve solves the technical problems that in the prior art, the upper limit of temperature and pressure is low, and abrasion and leakage are prone to occurring. The stop valve comprises a valve body, a valve seat, a valve cover and a valve rod. The valve body comprises a first channel and a second channel which are communicated with each other, the valve seat is located at the joint of the first channel and the second channel, the valve seat and the valve cover are detachably matched with the valve body, the valve rod is in sliding fit with the valve cover so that the valve rod can be close to or away from the valve seat, and when the valve rod is close to the valve seat, the valve rod can cut off the first channel and the second channel. All parts of the stop valve are detachably matched, so that the valve seat can be taken out for hard alloy surfacing, the use temperature and pressure of the stop valve are greatly improved, and the service life of the stop valve can be effectively prolonged.

The utility model relates to the technical field of valves, in particular to a liquid hydrogen low-temperature stop valve which comprises a valve body, a valve clack and a valve rod connected with the valve clack, a medium channel is arranged in the valve body, the valve body is connected with a valve cover, the liquid hydrogen low-temperature stop valve further comprises a vacuum jacket arranged on the outer side of the valve body, and a flange plate extends from one end, close to the valve cover, of the valve body. One end of the vacuum jacket is connected with the flange plate, the other end of the vacuum jacket is connected with the outer wall, corresponding to the medium channel, of the valve body, a vacuum cavity is formed between the vacuum jacket and the valve body, and a first screw plug communicated with the vacuum cavity is arranged at the end, close to the medium channel, of the vacuum jacket. The outer side of the valve body is connected with the vacuum jacket, so that a vacuum state is formed between the vacuum jacket and the valve body, heat exchange between the outer wall of the valve and air is reduced to the maximum extent, heat loss is fully reduced, cooling time is shortened, and a liquid hydrogen medium can be stably conveyed at low temperature.

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 plate has a plate portion with an elastomeric seal on a front face and an elongated connecting portion spaced apart from a rear face by a slot for fastening the valve plate to a valve rod. The extension of the connecting portion in the width direction is defined by opposing first and second side edges of the connecting portion when viewed in a plan view of the rear face of the plate portion. A connecting structure is configured in the connecting portion in a central region of the longitudinal extension of the first side edge of the connecting portion for connecting the connecting portion to an end portion of the valve rod. The connecting portion is reinforced in a region of its extension in the width direction adjoining the second side edge, relative to a region of its extension in the width direction adjoining the first side edge.

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 invention relates to the technical field of check valves, in particular to an adjustable spherical check valve which comprises a valve shell, a sealing disc, a cover plate and a liquid inlet bent pipe. The top of the valve shell is connected with the sealing disc through a splicing disc C. A guide sleeve is arranged at the axis of the sealing disc in a sleeving mode, and a movable column is arranged in the guide sleeve in a sleeving mode. The two ends of the top of the sealing disc are connected with a cover plate through connecting rods, an adjusting screw rod is installed on the cover plate through a screw hole, the bottom of the adjusting screw rod is sleeved with a bearing, a bearing seat is installed at the bottom end of the bearing, and a supporting spring is arranged between the bearing seat and the movable column. The adjustable spherical check valve adjusts the degree of tightness of extrusion on the supporting spring, so that circulation of the valve body is achieved under different liquid pressures, the use requirement for conveying liquid with different concentrations is met, liquid additives or gas can be conveniently and evenly introduced into the conveyed liquid, mixing is achieved, manpower and material resources are saved, and the use effect is improved.

The invention discloses a stop valve for fluid control and a working method of the stop valve, solves the problem that in the prior art, due to the fact that a valve rod and a valve element are not aligned, the opening and closing function is prone to failure, and has the beneficial effects that the stop valve for fluid control comprises a valve body, and the valve body forms a fluid opening and closing channel; the valve body is connected with the middle valve cover in a sealed mode, the middle valve cover is connected with the upper valve cover in a sealed mode, a driving piece is arranged at the position of the upper valve cover, the driving piece can rotate relative to the upper valve cover, the driving piece is connected with the valve rod through a thread structure, and the valve rod sequentially penetrates through the upper valve cover, the middle valve cover and the valve body and then is connected with the valve element. One section of the valve rod is in sliding connection with the upper valve deck or the middle valve deck to limit rotation of the valve rod along with the driving piece, so that the valve rod drives the valve element to move relative to the valve body in the axis direction of the valve body, and opening or closing of the opening and closing channel is achieved.

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.