Gate structure and gate valve

Abstract

The present application relates to the technical field of flow control valves, and in particular to a gate structure and a gate valve. The gate structure includes an elastic member and a gate. The gate has a mounting cavity, and the elastic member is arranged in the mounting cavity. When the gate is completely closed on the gate seat, the gate seat will apply pressure to the gate, and this pressure is transmitted to the elastic member through the gate seat. The compressed elastic member will generate a reaction force based on this pressure and act on the gate, causing the gate to move toward the inner wall of the gate seat and finally completely seal the gate on the gate seat. The gate sleeve has a first conducting channel, and the valve stem has a second conducting channel. When the valve is opened, the medium sequentially passes through the first conducting channel and the second conducting channel to achieve pressure relief in the accommodating cavity, and this pressure relief will cause the gate to retract. Whether the gate is closed on the gate seat or detached from the gate seat, no friction will be generated between the gate and the gate seat, thereby increasing the service life of the gate.

Description

Technical Field

[0001] The present application relates to the technical field of flow control valves, and in particular to a gate plate structure and a gate valve. Background Art

[0002] Currently, internal pressure-driven retractable gate discs are a crucial component of gate valves. Existing discs typically employ wedge-shaped single discs and elastic discs. When used in high-temperature, high-pressure environments, these discs are subject to significant media pressure and friction between the disc and the valve seat when unseating or seating. Ultimately, the valve stem can break due to the significant torque.

[0003] Therefore, there is an urgent need for a gate structure and a gate valve to solve the technical problems existing in the prior art to a certain extent. Summary of the Invention

[0004] The purpose of the present application is to provide a gate plate structure and a gate valve, so as to solve, to a certain extent, the technical problem in the prior art of large friction between the gate plate and the valve seat when the gate plate leaves or sits.

[0005] The present application provides a gate structure, comprising a gate, a gate sleeve, and a valve stem; the gate sleeve has an accommodating cavity; a portion of the gate is disposed in the accommodating cavity, and another portion of the gate protrudes from the gate sleeve; the valve stem is connected to the gate sleeve, and the valve stem can drive the gate to move in a first direction through the gate sleeve to close the gate to a gate seat, or to move in a direction opposite to the first direction to open the gate to the gate seat;

[0006] The gate structure includes an elastic member. The gate located in the accommodating cavity has a mounting cavity, and the elastic member is disposed in the mounting cavity. The elastic member can drive the gate to close on the gate seat.

[0007] The gate plate and the gate plate sleeve located in the accommodating cavity form a closed cavity, the gate plate sleeve is provided with a first conducting channel, the first conducting channel is communicated with the closed cavity, and the valve stem is provided with a second conducting channel corresponding to the first conducting channel; the medium in the closed cavity can be discharged from the gate plate sleeve through the first conducting channel and the second conducting channel in sequence to enable the gate plate to be separated from the gate plate seat.

[0008] In the above technical solution, further, the gate includes a gate body symmetrically arranged with the axis of the valve stem as the symmetry axis;

[0009] The gate body includes a limiting portion close to the axis of the valve stem and a sealing portion connected to the limiting portion;

[0010] The limiting portion is provided with a mounting groove along its axial direction;

[0011] The symmetrical mounting grooves can be surrounded by the mounting cavity, and both ends of the elastic member are respectively in contact with the bottom walls of the symmetrical mounting grooves; a conducting gap communicating with the first conducting channel is formed between the symmetrical limiting portions.

[0012] In the above technical solution, further, the gate sleeve includes a valve sleeve body and a limit plate;

[0013] The valve plate sleeve body is provided with a through hole along the second direction; the limiting plate is arranged in the through hole and the limiting plate is coaxial with the through hole;

[0014] There are two limit plates, and the two limit plates are arranged at intervals so that the accommodating cavity is surrounded by the two limit plates and the inner side wall of the valve plate sleeve body;

[0015] The side wall of the gate sleeve body surrounding the accommodating cavity is provided with the first conducting channel corresponding to the conducting gap;

[0016] The limiting plate is provided with a limiting hole through which the limiting portion can pass.

[0017] In the above technical solution, further, the limiting hole is a waist-shaped hole, and a limiting block is sleeved on the edge of the limiting portion close to the axis of the valve stem, and the limiting block is waist-shaped;

[0018] The size of the limiting blocking piece is smaller than the size of the limiting hole and the size of the major axis of the limiting blocking piece is larger than the size of the minor axis of the limiting hole, so that when the major axis of the limiting blocking piece is parallel to the major axis of the limiting hole, the limiting blocking piece can pass through the limiting hole, and when the limiting blocking piece passes through the limiting hole and is rotated at a preset angle, the limiting blocking piece is clamped in the installation cavity.

[0019] In the above technical solution, further, the limiting hole is a structure in which a circular hole is formed in the middle and a concave hole is extended along the third direction with the center of the circular hole as the center; a limiting block is sleeved on the edge of the limiting portion close to the axis of the valve stem, and the limiting block is a structure in which a circular edge is formed in the middle and a lug is extended along the third direction with the center of the circular edge as the center;

[0020] The size of the limiting blocking piece is smaller than the size of the limiting hole and the length of the limiting blocking piece along the third direction is greater than the diameter of the circular hole, so that the limiting blocking piece can pass through the limiting hole, and when the limiting blocking piece is rotated at a preset angle, the limiting blocking piece is clamped in the installation cavity.

[0021] In the above technical solution, further, the gate structure further includes a positioning shaft that is in communication with the conducting gap and has a third conducting channel opened along the first direction;

[0022] The positioning shaft includes a positioning portion and a long cylindrical portion connected to the positioning portion in a T-shape;

[0023] The positioning portion of the positioning shaft can be clamped on the gate sleeve, and the long cylindrical portion can abut against the limiting block piece clamped on the installation cavity to prevent the limiting block piece from rotating along the circumferential direction of the limiting hole.

[0024] In the above technical solution, further, the gate structure further includes a positioning shaft that is in communication with the conducting gap and has a third conducting channel opened along the first direction;

[0025] Any one of the lugs is provided with a limiting groove along the third direction, and the length of the limiting groove is equal to the length of the positioning shaft;

[0026] The positioning shaft includes a positioning portion and a long cylindrical portion connected to the positioning portion in a T-shape;

[0027] The positioning portion of the positioning shaft can be engaged with the gate sleeve, and the long cylindrical portion can be engaged with the limiting groove to prevent the limiting block from rotating along the circumferential direction of the limiting hole.

[0028] In the above technical solution, further, the gate structure also includes a sealing ring;

[0029] The sealing ring sleeve is provided at the connection between the sealing portion and the gate sleeve;

[0030] The sealing ring is provided with a Z-shaped gap.

[0031] In the above technical solution, further, the gate sleeve is made of martensitic stainless steel; the gate is made of austenitic stainless steel and cemented carbide; and the sealing ring is made of stainless steel metal.

[0032] The present application also provides a gate valve, comprising the above-mentioned gate plate structure.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] The present application provides a gate structure, comprising a gate, a gate sleeve and a valve stem; the gate sleeve has a accommodating cavity; a part of the gate is arranged in the accommodating cavity, and the other part of the gate protrudes from the gate sleeve; the valve stem is connected to the gate sleeve, and the valve stem can drive the gate to move in a first direction through the gate sleeve to close the gate on the gate seat or move in a direction opposite to the first direction to open the gate on the gate seat; specifically, the gate structure includes an elastic member, preferably, the elastic member is a spring; the gate located in the accommodating cavity has an installation cavity, and the elastic member is arranged in the installation cavity; more specifically, the end face of the gate is an inclined end face, and the gate can be understood as a gate with a wedge-shaped structure, and the gate seat is also a wedge-shaped structure (this wedge-shaped gate and gate seat are a kind of existing There is technology, and those skilled in the art can understand it); when in a static state, the spring is in a compressed state (this compression causes the gate to exert a force on the gate seat), and of course, the force generated by this compression is relatively small; the specific process of the gate closing on the gate seat is: the gate is continuously driven toward the gate seat in a vertical downward direction. During the downward movement, the medium in the closed cavity is discharged through the first channel and the second channel. The gate is compressed by the pressure of the medium on the outer wall and the spring always shrinks toward the accommodating cavity without contacting the side wall of the gate seat. When the gate is completely closed on the gate seat, the medium accommodating discharge channel is closed, and the external medium enters the accommodating cavity through the gap between the gate and the gate sleeve. There is no pressure outside the gate, and the compressed spring will generate a reaction force and act on the gate, so that the gate moves toward the inner wall of the gate seat and finally completely seals the gate on the gate seat.

[0035] During the entire process of the gate plate being closed on the gate plate seat, no friction is generated between the gate plate and the gate plate seat, thereby increasing the service life of the gate plate.

[0036] Specifically, the gate plate and the gate plate sleeve located in the accommodating cavity form a relatively closed closed cavity, the gate plate sleeve is provided with a first conducting channel corresponding to the closed cavity, and the valve stem is provided with a second conducting channel corresponding to the first conducting channel; that is, the closed cavity, the first conducting channel and the second conducting channel are channels that are mutually conducting.

[0037] More specifically, in actual application, the end of the valve stem is connected to the outlet device (the outlet device is not within the scope of protection of this application, so it will not be elaborated in detail. Here, the outlet device can be understood as a liquid receiving box, and the liquid receiving box and the valve stem are connected by a pipeline, and a control valve is provided on the pipeline); the specific process of the gate opening on the gate seat is: when the gate needs to be pulled out from the gate seat, the control valve is first driven to allow the medium in the accommodating chamber to be discharged to the liquid receiving box through the first conducting channel and the second conducting channel in turn, and the gate is opened to the gate seat. The pressure in the accommodating chamber is now released, and this pressure release will cause the gate to retract, that is, the width of the gate will be smaller than the width of the gate hole of the gate seat again; then the valve stem is driven to move in the vertical upward direction, and the gate will also slowly move in the vertical upward direction from the gate seat. During this process, the gate never touches the inner wall of the gate seat. Compared with the existing technology that adopts a hard pulling method (friction will be generated between the gate and the gate seat due to friction), the gate of the present application will not generate friction when it is separated from the gate seat, thereby improving the service life of the gate.

[0038] In summary, no matter whether the gate is closed on the gate seat or detached from the gate seat, no friction will be generated between the gate and the gate seat, thereby increasing the service life of the gate.

[0039] The gate valve provided in the present application includes the gate plate structure described above, and thus has all the beneficial effects of the gate plate structure, which will not be elaborated in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] Figure 1 This is a schematic diagram of the overall structure of the gate structure provided in Example 1 of the present application;

[0042] Figure 2 A cross-sectional view of the gate structure provided in Example 1 of the present application;

[0043] Figure 3 A schematic structural diagram of a gate sleeve in a gate structure provided in Example 1 of the present application at a first viewing angle;

[0044] Figure 4 A schematic structural diagram of the gate sleeve in the gate structure provided in Example 1 of the present application at a second viewing angle;

[0045] Figure 5A schematic structural diagram of the gate sleeve in the gate structure provided in Example 1 of the present application from a third viewing angle;

[0046] Figure 6 A schematic structural diagram of the gate sleeve in the gate structure provided in Example 1 of the present application at a fourth viewing angle;

[0047] Figure 7 This is a schematic structural diagram of the gate structure provided in Example 1 of the present application, viewed from a first perspective after the gate sleeve is hidden;

[0048] Figure 8 This is a schematic diagram of the structure of the gate structure provided in Example 1 of the present application, viewed from a second perspective after the gate sleeve is hidden;

[0049] Figure 9 A schematic structural diagram of the gate plate in the gate plate structure provided in Example 1 of the present application at a first viewing angle;

[0050] Figure 10 A schematic structural diagram of the gate plate in the gate plate structure provided in Example 1 of the present application at a second viewing angle;

[0051] Figure 11 A schematic structural diagram of the positioning shaft in the gate structure provided in Example 1 of the present application;

[0052] Figure 12 This is a schematic structural diagram of the sealing ring in the gate structure provided in Example 1 of the present application.

[0053] Reference numerals:

[0054] 1-gate; 2-gate sleeve; 3-valve stem; 4-accommodating chamber; 5-first direction; 6-elastic member; 7-installation chamber; 8-conduction gap; 9-first conduction channel; 10-second conduction channel; 11-gate body; 12-limiting portion; 13-sealing portion; 14-installation groove; 15-valve plate sleeve body; 16-limiting plate; 17-second direction; 18-through hole; 19-limiting hole; 20-limiting baffle; 21-circular hole; 22-third direction; 23-concave hole; 24-circular edge; 25-lug; 26-positioning shaft; 27-limiting groove; 28-positioning portion; 29-long cylindrical portion; 30-sealing ring; 31-Z-shaped gap; 32-third conduction channel; 33-clamping groove. DETAILED DESCRIPTION

[0055] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0056] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0057] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0058] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0060] Example 1

[0061] Combine Figures 1 to 12 The structure of the gate plate 1 provided in this application is described.

[0062] The present application provides a gate 1 structure, comprising a gate 1, a gate sleeve 2 and a valve stem 3; the gate sleeve 2 has an accommodating cavity 4; a portion of the gate 1 is arranged in the accommodating cavity 4, and the other portion of the gate 1 protrudes from the gate sleeve 2; the valve stem 3 is connected to the gate sleeve 2, and when the valve stem 3 is driven to move along a first direction 5, the gate 1 can be closed on the gate seat, thereby closing the valve; when moving in a direction opposite to the first direction 5, the gate 1 can leave the gate seat, that is, the gate 1 is opened on the gate seat, thereby opening the valve.

[0063] It is worth noting that: the first direction 5 is the vertical downward direction of the gate plate 1 when the structure is in normal use, and the direction opposite to the first direction 5 is the vertical upward direction of the gate plate 1 when it is in normal use.

[0064] In the process of closing or opening the gate plate 1 on the gate plate seat, huge friction will be generated between the gate plate 1 and the gate plate seat. This friction will reduce the service life of the gate plate 1. In addition, under the flow of high-pressure medium, the valve stem 3 may break. Based on this technical problem, the present application provides a new gate plate 1 structure.

[0065] Specifically, the gate plate 1 structure includes an elastic member 6, preferably, the elastic member 6 is a spring; the gate plate 1 located in the accommodating cavity 4 has a mounting cavity 7, and the elastic member 6 is arranged in the mounting cavity 7; more specifically, the end face of the gate plate 1 is an inclined end face, and the gate plate 1 can be understood as a gate plate 1 with a wedge-shaped structure, and the gate plate seat is also a wedge-shaped structure (this wedge-shaped gate plate 1 and gate plate seat is a prior art, which can be understood by those skilled in the art); in a static state, the spring is in a compressed state (this compression causes the gate plate to exert a force on the gate plate seat), of course, the force generated by this compression is relatively small; the specific process of the gate plate 1 closing on the gate plate seat is: along The vertical downward direction continuously drives the gate 1 to move toward the gate seat. During the downward movement, the medium in the closed cavity is discharged through the first channel and the second channel. The gate is compressed by the pressure of the medium on the outer wall and the spring always shrinks toward the accommodating cavity without touching the side wall of the gate seat. When the gate is completely closed on the gate seat, the medium accommodating and discharging channel (the medium accommodating and discharging channel refers to the connected first conducting channel and the second conducting channel) is closed, and the external medium enters the accommodating cavity through the gap between the gate and the gate sleeve. There is no pressure outside the gate, and the compressed spring will generate a reaction force and act on the gate, causing the gate to move toward the inner wall of the gate seat and finally completely seal the gate on the gate seat.

[0066] During the entire process of the gate plate 1 being closed on the gate plate seat, no friction is generated between the gate plate 1 and the gate plate seat, thereby increasing the service life of the gate plate 1.

[0067] Specifically, the gate plate 1 located in the accommodating cavity 4 has a conducting gap 8, the gate plate sleeve 2 has a first conducting channel 9 corresponding to the conducting gap 8, and the valve stem 3 has a second conducting channel 10 corresponding to the first conducting channel 9; that is, the conducting gap 8, the first conducting channel 9 and the second conducting channel 10 are channels that are mutually conducting.

[0068] More specifically, in actual application, the end of the valve stem 3 is connected to the outlet device (the outlet device is not within the scope of protection of this application, so it will not be elaborated on in detail. Here, the outlet device can be understood as a liquid receiving box, and the liquid receiving box and the valve stem 3 are connected by a pipeline, and a control valve is provided on the pipeline); the specific process of the gate 1 opening on the gate seat is: when the gate 1 needs to be pulled out of the gate seat, the control valve is first driven to allow the medium in the accommodating chamber 4 to be discharged to the liquid receiving box through the first conducting channel 9 and the second conducting channel 10 in turn, so as to achieve The pressure relief of the accommodating chamber 4 will cause the gate 1 to fold up, that is, the width of the gate 1 will be smaller than the width of the gate 1 hole of the gate seat again; then the valve stem 3 will be driven to move in the vertical upward direction, and the gate 1 will also slowly move in the vertical upward direction from the gate seat. During this process, the gate 1 never touches the inner wall of the gate seat. Compared with the existing technology that adopts a hard pulling method (friction will be generated between the gate 1 and the gate seat due to friction), the gate 1 of the present application will not generate friction when it is separated from the gate seat, thereby improving the service life of the gate 1.

[0069] It is worth noting that the aforementioned mutually connected closed accommodating cavity, the first conducting channel 9 and the second conducting channel 10 are equivalent to a pressure relief channel.

[0070] In summary, no matter the gate plate 1 is closed on the gate plate seat or detached from the gate plate seat, no friction is generated between the gate plate 1 and the gate plate seat, thereby increasing the service life of the gate plate 1.

[0071] In this embodiment, the gate 1 includes a gate body 11 arranged symmetrically with the axis of the valve stem 3 as the symmetry axis; the gate body 11 includes a limiting portion 12 close to the axis of the valve stem 3 and a sealing portion 13 connected to the limiting portion 12; the limiting portion 12 has a mounting groove 14 along its axial direction;

[0072] The symmetrical mounting groove 14 can surround the mounting cavity 7, and the two ends of the spring respectively abut against the bottom wall of the symmetrical mounting groove 14; that is, when the gate 1 is closed on the gate seat, the two ends of the spring simultaneously push the limiting part 12 connected to the two ends of the spring toward the gate seat, so that the sealing part 13 connected to the limiting part 12 is sealed on the gate seat.

[0073] More specifically, the conducting gap 8 communicating with the mounting cavity 7 is formed between the symmetrical limiting portions 12 .

[0074] In this embodiment, the gate sleeve 2 includes a valve sleeve body 15 and a limit plate 16;

[0075] The valve plate sleeve body 15 is provided with a through hole 18 along the second direction 17 (the second direction 17 here refers to the flow direction of the medium); the limit plate 16 is arranged in the through hole 18 and the limit plate 16 is coaxial with the through hole 18; specifically, the number of the limit plates is two, and the two limit plates 16 are arranged at intervals, and the accommodating cavity 4 is surrounded by the inner side wall of the limit plates 16 and the valve plate sleeve body 15.

[0076] More specifically, the side wall of the gate sleeve 2 body surrounding the accommodating cavity 4 is correspondingly provided with the first conducting channel 9; the limiting plate 16 is provided with a limiting hole 19 for the limiting portion 12 to pass through, and the limiting hole 19 and the limiting portion 12 can be understood as an interference fit assembly method.

[0077] Preferably, the limiting plate 16 and the gate sleeve 2 body are integrally formed.

[0078] In this embodiment, the interference fit method in which the limiting portion 12 directly passes through the limiting hole 19 may cause the limiting portion 12 to fall off from the limiting hole 19 along the second direction 17 due to natural factors, such as a certain fluctuation (vibration) in the flow of the medium. In order to prevent the limiting portion 12 from falling off from the limiting hole 19; specifically, the limiting hole 19 is a circular hole 21 in the middle and is centered along the third direction 22 (combined with the center of the circular hole 21). Figure 6 The concave hole 23 is extended in the third direction 22); specifically, a limit block 20 is sleeved on the edge of the limit portion 12 close to the axis of the valve stem 3, and a clamping groove 33 is formed between this limit plate 16 and the sealing portion 13; further, the limit block 20 is a structure with a circular edge 24 in the middle and a lug 25 extending along the third direction 22 with the center of the circular edge 24 as the center; the size of the limit block 20 is smaller than the size of the limit hole 19 and the length of the limit block 20 along the third direction 22 is greater than the diameter of the circular hole 21.

[0079] Preferably, the limiting block 20 and the limiting portion 12 are integrally formed.

[0080] It is worth noting that the above dimensions of the limit block 20 and the limit hole 19 can be understood as the outlines of the limit block 20 and the limit hole 19. Figure 5 and Figure 9 It can be seen that the contours of the limiting block piece 20 and the limiting hole 19 are the same. In this application, it is sufficient to ensure that the limiting block piece 20 is slightly smaller than the limiting hole 19 as a whole.

[0081] The actual installation process is as follows: align the limiting block 20 with the limiting hole 19 and pass it through the limiting hole 19 .

[0082] The actual limiting process is as follows: when the limiting block 20 passes through the limiting hole 19 and is located in the installation cavity 7, the limiting block 20 is rotated 90° so that the lug 25 is stuck by the edge of the limiting plate 16 surrounding the circular hole 21, thereby preventing the limiting block 20 from falling off from the limiting hole 19, that is, preventing the limiting portion 12 from falling off from the gate sleeve 2.

[0083] In addition, it should be noted that the width of the snap-fit ​​groove 33 is greater than the thickness of the limiting plate, that is, although the limiting block 20 is limited by the limiting plate, it does not affect the movement of the spring-driven sealing part 13 along the second direction 17, that is, it does not affect the sealing of the sealing part 13 to the gate seat.

[0084] In this embodiment, the limiting plate 16 is used to limit the limiting baffle in the above process. Considering that during use, once the limiting baffle rotates along its own axis, that is, the limiting baffle rotates again to the point where the lug 25 corresponds to the concave hole 23 and the circular edge 24 corresponds to the circular hole 21, since the size of the limiting baffle is smaller than the size of the limiting hole 19, there will still be a problem of the limiting baffle falling off the limiting plate 16. In this embodiment, in order to overcome this problem, the gate plate 1 structure also includes a positioning shaft 26 arranged in the first conducting channel 8 and having a fourth conducting channel 32 opened along the vertical direction; any one of the lugs 25 has a limiting groove 27 opened along the third direction 22, and the length H of the limiting groove 27 is equal to the length h of the positioning shaft 26.

[0085] Specifically, combined Figure 7 、 Figure 8 as well as Figure 11 As shown, the positioning shaft 26 includes a positioning portion 28 and a long cylindrical portion 29 connected to the positioning portion 28 in a T-shape; a third conducting channel 32 is provided in the positioning portion 28 and the long cylindrical portion 29, and the positioning portion 28 of the positioning shaft 26 can be snapped into the gate sleeve 2 and the long cylindrical portion 29 can be snapped into the limiting groove 27 to prevent the limiting block piece 20 from rotating circumferentially along the limiting hole 19, further preventing the limiting block piece 20 from falling off the limiting piece, and ensuring the stability of the gate 1.

[0086] At this time, the specific process of the gate 1 opening on the gate seat is: driving the electric valve so that the medium located in the accommodating chamber 4 is discharged to the liquid receiving tank through the conductive gap 8, the third conductive channel 32 and the second conductive channel 10 in sequence, thereby realizing the pressure relief of the accommodating chamber 4. The pressure relief causes the gate 1 to be retracted, that is, the width of the gate 1 is again smaller than the width of the gate 1 hole of the gate seat; then the valve stem 3 is driven to move in the vertical upward direction, and the gate 1 will also slowly move in the vertical upward direction from the gate seat.

[0087] In this embodiment, the gate 1 structure further includes a sealing ring 30 ; the sealing ring 30 is sleeved at the connection between the sealing portion 13 and the gate sleeve 2 ; and the sealing ring 30 has a Z-shaped gap 31 .

[0088] Preferably, considering the relatively high flow pressure of the medium, the sealing ring 30 is made of stainless steel.

[0089] Specifically, the Z-shaped gap 31 formed on the sealing ring 30 makes the sealing ring 30 a discontinuous structure. This discontinuous structure can facilitate the sealing ring 30 made of stainless steel to be sleeved on the sealing portion 13 .

[0090] More specifically, during the valve closing process, the medium will flow into the accommodating chamber 4 through the Z-shaped gap 31, providing the possibility for subsequent valve opening and pressure relief.

[0091] In this embodiment, the gate sleeve 2 is made of martensitic stainless steel and is heat-treated and processed to meet the requirements of withstanding high temperature and high pressure; the gate 1 is made of austenitic stainless steel and hard alloy.

[0092] In addition, all parts in this application are processed with high precision to ensure that each product has the same quality assurance and interchangeability.

[0093] Example 2

[0094] In order to prevent the limiting part from falling off from the limiting hole, in this embodiment, another structure of a limiting hole and a limiting baffle is provided, specifically, the limiting hole is a waist-shaped hole, and a limiting baffle is sleeved on the edge of the limiting part close to the axis of the valve stem, and the limiting baffle is waist-shaped; the size of the limiting baffle is smaller than the size of the limiting hole and the long axis size of the limiting baffle is larger than the size of the short axis of the limiting hole, so that when the long axis of the limiting baffle is parallel to the long axis of the limiting hole, the limiting baffle can pass through the limiting hole, and when the limiting baffle passes through the limiting hole and rotates the limiting baffle 90°, the limiting baffle is clamped in the mounting cavity.

[0095] In this embodiment, the limiting plate is used to limit the limiting baffle in the above process. Considering that during use, once the limiting baffle rotates along its own axis, that is, when the limiting baffle rotates again until its long axis is parallel to the long axis of the limiting hole, since the size of the limiting baffle is smaller than the size of the limiting hole, there will still be a problem of the limiting baffle falling off the limiting plate. In this embodiment, in order to overcome this problem, the gate structure also includes a positioning shaft arranged in the first conducting channel; the positioning shaft includes a positioning portion and a long cylindrical portion connected to the positioning portion in a T-shape; the positioning portion of the positioning shaft can be clamped to the gate sleeve and the long cylindrical portion can directly abut against the limiting baffle clamped to the mounting cavity to prevent the limiting baffle from rotating circumferentially along the limiting hole, further preventing the limiting baffle from falling off the limiting plate, thereby ensuring the stability of the gate.

[0096] At this time, the specific process of the gate opening on the gate seat is: driving the electric valve so that the medium in the accommodating chamber is discharged to the liquid receiving tank through the conductive gap, the third conductive channel and the second conductive channel in sequence, thereby realizing the pressure relief of the accommodating chamber. The pressure relief causes the gate to retract, that is, the width of the gate is again smaller than the width of the gate hole of the gate seat; then the valve stem is driven to move in the vertical upward direction, and the gate will also slowly move in the vertical upward direction from the gate seat.

[0097] Here, the fact that the long cylindrical portion can directly abut against the limit blocking piece clamped in the installation cavity can be understood as a hard abutment and a connection method.

[0098] Example 3

[0099] In this embodiment, the above-mentioned interference assembly method in which the limiting part directly passes through the limiting hole may cause the limiting part to fall off from the limiting hole along the second direction due to natural factors, such as certain fluctuations (vibrations) in the flow of the medium. In order to prevent the limiting part from falling off from the limiting hole; specifically, the limiting hole is a structure in which a circular hole is in the middle and a concave hole is extended along a third direction (the third direction has been explained above and will not be explained in detail here) with the center of the circular hole as the center; specifically, a limiting baffle is provided on the edge of the limiting part close to the axis of the valve stem, and a clamping groove is formed between this limiting plate and the sealing part; further, the limiting baffle is a structure in which a circular edge is in the middle and a lug is extended along the third direction with the center of the circular edge as the center; the size of the limiting baffle is smaller than the size of the limiting hole and the length of the limiting baffle along the third direction is greater than the diameter of the circular hole.

[0100] Preferably, the limiting block and the limiting portion are integrally formed.

[0101] It is worth noting that the above-mentioned size of the limiting block piece and the size of the limiting hole can be understood as the outer contours of the limiting block piece and the limiting hole. In this application, it is sufficient to ensure that the limiting block piece is slightly smaller than the overall contour of the limiting hole.

[0102] The actual installation process is: align the limit block with the limit hole and pass it through the limit hole.

[0103] The actual limiting process is: when the limiting block passes through the limiting hole and is located in the installation cavity, the limiting block is rotated 90° so that the lug is stuck by the edge of the limiting plate surrounding the circular hole, thereby preventing the limiting block from falling off from the limiting hole, that is, preventing the limiting part from falling off from the gate sleeve.

[0104] In addition, it should be noted that the width of the snap-fit ​​groove is greater than the thickness of the limiting plate, that is, although the limiting plate is limited by the limiting plate, it does not affect the movement of the spring-driven sealing part along the second direction, that is, it does not affect the sealing of the sealing part to the gate seat.

[0105] In this embodiment, the limit plate is used to limit the limit baffle in the above process. Considering that during use, once the limit baffle rotates along its own axis, that is, the limit baffle is rotated again to the concave hole corresponding to the lug and the circular edge corresponding to the circular hole, since the size of the limit baffle is smaller than the size of the limit hole, there will still be a problem of the limit baffle falling off the limit plate. In this embodiment, in order to overcome this problem, the gate structure also includes a positioning shaft connected to the conductive gap; the positioning shaft includes a positioning portion and a long cylindrical portion connected to the positioning portion in a T-shape; the positioning portion of the positioning shaft can be clamped to the gate sleeve and the long cylindrical portion can directly abut against the limit baffle clamped to the mounting cavity to prevent the limit baffle from rotating circumferentially along the limit hole, further preventing the limit baffle from falling off the limit plate, and ensuring the stability of the gate.

[0106] At this time, the specific process of the gate opening on the gate seat is: driving the electric valve so that the medium in the accommodating chamber is discharged to the liquid receiving tank through the conductive gap, the third conductive channel and the second conductive channel in sequence, thereby realizing the pressure relief of the accommodating chamber. The pressure relief causes the gate to retract, that is, the width of the gate is again smaller than the width of the gate hole of the gate seat; then the valve stem is driven to move in the vertical upward direction, and the gate will also slowly move in the vertical upward direction from the gate seat.

[0107] Here, the fact that the long cylindrical portion can directly abut against the limit blocking piece clamped in the installation cavity can be understood as a hard abutment and a connection method.

[0108] Example 4

[0109] The gate valve provided in the present application includes the gate plate structure described above, and thus has all the beneficial effects of the gate plate structure, which will not be elaborated in detail here.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gate structure, comprising a gate, a gate sleeve, and a valve stem; the gate sleeve having an accommodating cavity; a portion of the gate being disposed in the accommodating cavity, and another portion of the gate protruding from the gate sleeve; the valve stem being connected to the gate sleeve, and capable of driving the gate through the gate sleeve to move in a first direction to close the gate to a gate seat, or in a direction opposite to the first direction to open the gate to the gate seat; It is characterized by: The gate structure includes an elastic member. The gate located in the accommodating cavity has a mounting cavity, and the elastic member is disposed in the mounting cavity. The elastic member can drive the gate to close on the gate seat. The gate and gate sleeve located in the accommodating chamber form a closed chamber, the gate sleeve is provided with a first conducting channel, the first conducting channel is communicated with the closed chamber, and the valve stem is provided with a second conducting channel corresponding to the first conducting channel; the medium in the closed chamber can be sequentially discharged from the gate sleeve through the first conducting channel and the second conducting channel to enable the gate to be separated from the gate seat; The gate plate includes a gate plate body symmetrically arranged with the axis of the valve stem as the symmetry axis; The gate body includes a limiting portion close to the axis of the valve stem and a sealing portion connected to the limiting portion; The limiting portion is provided with a mounting groove along its axial direction; The symmetrical mounting grooves are capable of surrounding the mounting cavity, and both ends of the elastic member are respectively in contact with the bottom wall of the symmetrical mounting grooves; a conducting gap communicating with the first conducting channel is formed between the symmetrical limiting portions; The gate sleeve includes a valve sleeve body and a limit plate; The valve plate sleeve body is provided with a through hole along the second direction; the limiting plate is arranged in the through hole and the limiting plate is coaxial with the through hole; There are two limit plates, and the two limit plates are arranged at intervals so that the accommodating cavity is surrounded by the two limit plates and the inner side wall of the valve plate sleeve body; The side wall of the valve plate sleeve body surrounding the accommodating cavity is provided with the first conducting channel corresponding to the conducting gap; The limiting plate is provided with a limiting hole through which the limiting portion can pass.

2. The gate structure according to claim 1, characterized in that: The limiting hole is a waist-shaped hole, and a limiting block is sleeved on the edge of the limiting portion close to the axis of the valve stem, and the limiting block is waist-shaped; The size of the limiting blocking piece is smaller than the size of the limiting hole and the size of the major axis of the limiting blocking piece is larger than the size of the minor axis of the limiting hole, so that when the major axis of the limiting blocking piece is parallel to the major axis of the limiting hole, the limiting blocking piece can pass through the limiting hole, and when the limiting blocking piece passes through the limiting hole and is rotated at a preset angle, the limiting blocking piece is clamped in the installation cavity.

3. The gate structure according to claim 1, characterized in that: The limiting hole is a structure with a circular hole in the middle and a concave hole extending along the third direction with the center of the circular hole as the center; the edge of the limiting portion close to the axis of the valve stem is provided with a limiting blocker, and the limiting blocker is a structure with a circular edge in the middle and a lug extending along the third direction with the center of the circular edge as the center; The size of the limiting blocking piece is smaller than the size of the limiting hole and the length of the limiting blocking piece along the third direction is greater than the diameter of the circular hole, so that the limiting blocking piece can pass through the limiting hole, and when the limiting blocking piece is rotated at a preset angle, the limiting blocking piece is clamped in the installation cavity.

4. The gate structure according to claim 2 or 3, characterized in that: The gate structure further includes a positioning shaft that is in communication with the conducting gap and has a third conducting channel opened along the first direction; The positioning shaft includes a positioning portion and a long cylindrical portion connected to the positioning portion in a T-shape; The positioning portion of the positioning shaft can be clamped on the gate sleeve, and the long cylindrical portion can abut against the limiting block piece clamped on the installation cavity to prevent the limiting block piece from rotating along the circumferential direction of the limiting hole.

5. The gate structure according to claim 3, characterized in that: The gate structure further includes a positioning shaft that is in communication with the conducting gap and has a third conducting channel opened along the first direction; Any one of the lugs is provided with a limiting groove along the third direction, and the length of the limiting groove is equal to the length of the positioning shaft; The positioning shaft includes a positioning portion and a long cylindrical portion connected to the positioning portion in a T-shape; The positioning portion of the positioning shaft can be engaged with the gate sleeve, and the long cylindrical portion can be engaged with the limiting groove to prevent the limiting block from rotating along the circumferential direction of the limiting hole.

6. The gate structure according to claim 3, characterized in that: The gate structure also includes a sealing ring; The sealing ring sleeve is provided at the connection between the sealing portion and the gate sleeve; The sealing ring is provided with a Z-shaped gap.

7. The gate structure according to claim 6, characterized in that: The gate sleeve is made of martensitic stainless steel; the gate is made of austenitic stainless steel and hard alloy; and the sealing ring is made of stainless steel metal.

8. A gate valve, characterized in that: The gate structure comprises the gate structure according to any one of claims 1 to 7.

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