Gate valve
By setting multiple limiting parts on the valve cavity wall of the gate valve, the problem of deviation of the gate plate during lifting and lowering is solved, the guiding limiting effect of the gate plate is improved, and the sealing effect of the valve is ensured.
Patent Information
- Application Number
- CN202421379031.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-17
AI Technical Summary
In existing gate valves, the gate plate is prone to bias when lifting and lowering, resulting in the problem of leaking the sealing surface or damaging the gate plate sealing surface, affecting the overall sealing effect of the valve.
By providing at least two limiting parts, such as limiting convex ribs, on the first cavity wall and the second cavity wall of the valve body, the side of the gate plate is slidably cooperated with these limiting parts, thereby improving the guiding limiting effect and preventing the gate from being able to prevent the gate from being able to The board shaking and biased.
Effectively prevent the shaking and bias of the gate plate during lifting and lowering, avoid the problem of leaking the sealing surface or damaging the gate plate sealing surface, and ensure the overall sealing effect of the valve.
Smart Images
Figure CN222479494U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a gate valve. Background Art
[0002] A gate valve is a common type of valve in the valve field. It usually includes a valve body and a gate. The valve body has a channel for fluid to pass through. The flow or cutoff of the fluid in the channel is controlled by the up and down movement of the gate. When the gate is fully closed, the sealing effect is achieved by the close fit between the two sealing surfaces on the gate and the two sealing surfaces on the valve body.
[0003] In the prior art, a single limiting structure is usually provided on both radial sides of the valve body, and the radial sides of the gate plate are respectively controlled to rise and fall by cooperating with the single limiting structure. However, the existing gate plate is usually a wedge-shaped gate plate, that is, the upper end of the gate plate is thick and the lower end is thin. When the gate plate is fully opened, there is a large gap between the lower sealing surface of the gate plate and the upper sealing surface of the valve body. Therefore, the gate plate is prone to left and right deviation when descending, and the guiding limiting effect of the single limiting structure is poor, which eventually causes the gate plate to deviate from the preset space range and tighten downward, thereby causing sealing leakage or damaging the gate plate sealing surface, thereby affecting the overall sealing effect of the valve.
[0004] Therefore, it is urgent to provide a gate valve to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a gate valve which can effectively solve the technical problem of the gate plate being biased during the lifting movement.
[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:
[0007] A gate valve comprises a valve body and a gate plate, wherein the valve body comprises a gate plate cavity, the gate plate is slidably arranged in the gate plate cavity, the gate plate comprises two oppositely arranged sealing surfaces and a gate plate side surface connected between the two sealing surfaces, the gate plate cavity comprises a first cavity wall and a second cavity wall which cooperate with and are oppositely arranged to the gate plate side surface, and the first cavity wall and the second cavity wall are respectively provided with at least two limiting parts for preventing the gate plate from shaking.
[0008] As an optional solution, the limiting portion is a limiting rib.
[0009] As an optional solution, two of the limiting convex ribs are respectively provided on the first cavity wall and the second cavity wall, and the two limiting convex ribs are spaced apart along the arrangement direction of the two sealing surfaces.
[0010] As an optional solution, the side of the gate plate facing the first cavity wall and the side facing the second cavity wall are respectively provided with limiting planes, the limiting planes are parallel to the moving direction of the gate plate, and the limiting planes on each side are slidably matched with the limiting parts on the corresponding side.
[0011] As an optional solution, two limiting planes are respectively provided on the side of the gate plate facing the first cavity wall and the side facing the second cavity wall, the two limiting planes on each side are spaced apart along the arrangement direction of the two sealing surfaces, and a first groove is provided between the two limiting planes on each side.
[0012] As an optional solution, a second groove is further provided at the bottom of the gate plate.
[0013] As an optional solution, the gate valve also includes a valve cover and a valve stem, the valve cover is fixedly connected to the valve body, one end of the valve stem is threadedly connected to the gate plate, and the other end of the valve stem extends out of the valve cover, a protrusion is convexly provided on the circumferential side of the valve stem, a matching hole is provided at the top of the valve cover, and the protrusion is rotatably arranged in the matching hole, and the gate valve also includes a pressure cover, which is fixedly connected to the valve cover, and a through hole is provided on the pressure cover for the valve stem to pass through, and the aperture of the through hole is smaller than the outer diameter of the protrusion.
[0014] As an optional solution, the limiting portion is a limiting groove, and the gate plate is provided with a limiting protrusion that cooperates with the limiting groove.
[0015] The beneficial effects of the utility model are:
[0016] The utility model provides a gate valve, by respectively arranging at least two limiting parts for preventing the gate plate from shaking on the first cavity wall and the second cavity wall, so that during the lifting process of the gate plate, the side of the gate plate that cooperates with the first cavity wall can cooperate with the two limiting parts for sliding limitation, and at the same time, the side of the gate plate that cooperates with the second cavity wall can also cooperate with the at least two limiting parts for sliding limitation, effectively improving the guiding and limiting effect of the gate plate, thereby effectively preventing the gate plate from shaking and deviating during the lifting movement, avoiding the problem of sealing leakage or damage to the sealing surface of the gate plate, and thus ensuring the overall sealing effect of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to explain the embodiments of the utility model or the technical solutions in the prior art more clearly and easily, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a structural schematic diagram of a gate valve provided by an embodiment of the utility model;
[0019] Figure 2 is a cross-sectional view of a gate valve provided by an embodiment of the utility model;
[0020] Figure 3 is a cross-sectional view of a valve body provided by an embodiment of the utility model;
[0021] Figure 4 It is a structural schematic diagram of a valve body provided by an embodiment of the utility model;
[0022] Figure 5 It is a schematic diagram of the cooperation between the valve body and the gate provided in the embodiment of the utility model;
[0023] Figure 6 This is a schematic diagram of the structure of the gate provided by the embodiment of the utility model. Figure 1 ;
[0024] Figure 7 This is a schematic diagram of the structure of the gate provided by the embodiment of the utility model. Figure 2 .
[0025] In the figure:
[0026] 10. valve body; 101. liquid flow channel; 11. liquid inlet joint; 12. liquid outlet joint; 13. gate cavity; 131. first cavity wall; 132. second cavity wall; 14. limiting convex rib;
[0027] 20. gate; 21. limiting plane; 22. first groove; 23. connecting portion; 231. threaded hole; 24. sealing surface; 25. recessed portion; 26. gate side; 27. second groove;
[0028] 30. Valve cover; 31. Matching hole;
[0029] 40. valve stem; 41. raised portion;
[0030] 50. Hand wheel;
[0031] 60. Pressure cap; 61. Through hole. DETAILED DESCRIPTION
[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0036] like Figure 1 and Figure 2 As shown, this embodiment provides a gate valve, including a valve body 10 and a gate plate 20, the valve body 10 includes a gate plate cavity 13 and a liquid inlet joint 11 and a liquid outlet joint 12 respectively connected to two opposite sides of the gate plate cavity 13, a liquid flow channel 101 is formed between the liquid inlet joint 11 and the liquid outlet joint 12, wherein the liquid flow channel 101 extends along the X-axis direction in the figure, the gate plate 20 is slidably arranged in the gate plate cavity 13, and the gate plate 20 can be a wedge-shaped gate plate. By descending or rising the gate plate 20 in the gate plate cavity 13, the liquid flow channel 101 can be cut off or connected, thereby controlling the cutoff or flow of the fluid in the channel, so as to achieve the closing or opening of the gate valve.
[0037] Combination Figures 4 to 6The gate 20 includes two sealing surfaces 24 arranged opposite to each other and a gate side surface 26 surrounding and connecting between the two sealing surfaces 24. The two sealing surfaces 24 are arranged at intervals along the X-axis direction, and the sealing surfaces 24 are in contact with the end surfaces at opposite ends of the gate cavity 13 along the X-axis direction. When the gate 20 is lowered to be completely located in the gate cavity 13, the sealing effect is achieved by the sealing surfaces 24 on both sides of the gate 20 and the end surfaces at opposite ends of the gate cavity 13 along the X-axis direction, thereby achieving effective fluid cutoff.
[0038] like Figures 3 to 5 As shown, the gate cavity 13 has a first cavity wall 131 and a second cavity wall 132 that are matched with and opposite to the gate side 26. The first cavity wall 131 and the second cavity wall 132 are arranged relatively spaced along the Y-axis direction, and the Y-axis direction is perpendicular to the X-axis direction. Among them, at least two limiting parts for preventing the gate 20 from shaking are respectively arranged on the first cavity wall 131 and the second cavity wall 132, and the two opposite sides of the gate side 26 along the Y-axis direction are respectively slidably matched with the limiting parts on the corresponding sides. In other words, at least two limiting parts can be set on the first cavity wall 131, and at least two limiting parts can also be set on the second cavity wall 132. In this embodiment, the limiting part is a limiting rib 14, and this embodiment is described by taking the limiting rib 14 as an example.
[0039] By respectively setting at least two limiting ribs 14 on the first cavity wall 131 and the second cavity wall 132 to prevent the gate plate 20 from shaking, the gate plate 20 can slide and limit with the two limiting ribs 14 on the side of the gate plate 26 that cooperates with the first cavity wall 131 during the lifting process, and the gate plate side 26 that cooperates with the second cavity wall 132 can also slide and limit with at least two limiting ribs 14, which effectively improves the guiding and limiting effect of the gate plate 20, thereby effectively preventing the gate plate 20 from shaking and deflecting during the lifting movement, avoiding the problem of sealing leakage or damaging the sealing surface 24 of the gate plate 20, and thus ensuring the overall sealing effect of the gate valve. Among them, the limiting rib 14 and the valve body 10 are an integrally formed structure, with high structural strength, convenient processing and manufacturing, and eliminating the assembly link of the limiting rib 14 and the valve body 10.
[0040] In an optional embodiment, if Figure 4 and Figure 5 As shown, two limiting convex ribs 14 are respectively arranged on the first cavity wall 131 and the second cavity wall 132, and the two limiting convex ribs 14 on each side are arranged at intervals along the arrangement direction (X-axis direction) of the two sealing surfaces 24, and each limiting convex rib 14 is arranged close to the sealing surface 24 on one side. By arranging two limiting convex ribs 14 on each side, on the basis of effectively improving the guiding and limiting effect of the gate plate 20, it is also convenient to process and save material costs.
[0041] In other embodiments, three, four or more limiting ribs 14 may be respectively provided on the first cavity wall 131 and the second cavity wall 132 , which can be adaptively selected according to actual needs and are not specifically limited here.
[0042] In an optional embodiment, if Figures 5 to 7 As shown, a limiting plane 21 is provided on the side of the gate plate side 26 facing the first cavity wall 131, and a limiting plane 21 is also provided on the side of the gate plate side 26 facing the second cavity wall 132. The limiting plane 21 is parallel to the moving direction of the gate plate 20, and the limiting plane 21 on each side is respectively slidably matched with the limiting convex ribs 14 on the corresponding side. The gate plate 20 is slidably matched with the two limiting convex ribs 14 on the corresponding side through the limiting planes 21 on the two opposite sides thereof, which increases the contact area between the gate plate 20 and the limiting convex ribs 14, thereby effectively improving the guiding and limiting effect of the gate plate 20, preventing the gate plate 20 from being deflected during the lifting movement, avoiding the problem of causing sealing leakage or damaging the sealing surface 24 of the gate plate 20, and thus ensuring the sealing effect of the gate valve as a whole.
[0043] In another optional embodiment, the limiting portion may also be a limiting groove, and the gate plate 20 is provided with a limiting protrusion that cooperates with the limiting groove, which can also achieve the above-mentioned limiting effect and will not be described in detail here.
[0044] In the prior art, the gate plate 20 generally adopts an integral plate structure. The overall thickness of this type of gate plate 20 is relatively thick, and the sealing surface 24 of the gate plate 20 lacks elasticity, is not easily deformed, and is easily worn, which can easily lead to failure of the gate plate 20.
[0045] In order to solve the above problems, Figures 5 to 7 As shown, two limiting planes 21 are respectively provided on the side of the gate side 26 facing the first cavity wall 131 and the side of the gate side 26 facing the second cavity wall 132. The two limiting planes 21 on each side are arranged at intervals along the arrangement direction (X-axis direction) of the two sealing surfaces 24. The two limiting planes 21 on each side can correspond to the two limiting ribs 14 on the same side one by one and limit the position. A first groove 22 is provided between the two limiting planes 21 on each side. In other words, the gate 20 is provided with first grooves 22 on the two opposite sides along the Y-axis direction, and the first grooves 22 are roughly U-shaped grooves. By providing the first grooves 22 on the gate side 26 of the gate 20, the thickness of the gate 20 is relatively reduced, and the sealing elasticity of the gate 20 is increased. When the sealing surfaces 24 on both sides of the gate 20 are fitted with the end faces at both ends of the gate cavity 13, the sealing surfaces 24 can produce deformation contact, making its sealing performance more stable, extending the service life of the gate 20, and having strong practicality.
[0046] Furthermore, if Figure 6 and Figure 7As shown, the bottom of the gate plate 20 is further provided with a second groove 27, which is also roughly a U-shaped groove. By providing the second groove 27 at the bottom of the gate plate 20, the sealing elasticity of the gate plate 20 can be further increased on the basis of ensuring the structural strength of the gate plate 20, so that its sealing performance is more stable, and the service life of the gate plate 20 is further improved, and the practicality is strong.
[0047] In an optional embodiment, if Figure 6 and Figure 7 As shown, bowl-shaped recessed portions 25 are respectively provided on opposite sides of the gate plate 20 along the X-axis direction, and the sealing surface 24 is arranged around the circumference of the recessed portions 25. The recessed portions 25 on both sides can further reduce the thickness of the gate plate 20, thereby further increasing the sealing elasticity of the gate plate 20. When the gate plate 20 is closed, the slight deformation of the gate plate 20 is utilized to make the sealing surfaces 24 on both sides of the gate plate 20 closely fit with the end surfaces at both ends of the axial direction of the gate plate cavity 13, so that the sealing performance is more stable and the service life of the gate plate 20 is extended. In addition, compared with the planar gate plate 20, when the gate plate 20 is closed when there is medium in the channel, the medium can flow back along the recessed portions 25, making it easier to close the gate plate 20 and saving materials.
[0048] like Figure 2 As shown, the gate valve further includes a valve cover 30, a valve stem 40 and a hand wheel 50. The valve cover 30 is threadedly connected to the top of the valve body 10, one end of the valve stem 40 is threadedly connected to the gate plate 20, and the other end of the valve stem 40 extends out of the valve cover 30 and is connected to the hand wheel 50. The valve stem 40 is rotatably connected to the inside of the valve cover 30. By rotating the hand wheel 50 in different directions around the axis, the valve stem 40 can be driven to rotate synchronously. As the valve stem 40 rotates, the gate plate 20 will rise or fall in the gate plate cavity 13 along the thread of the valve stem 40, thereby cutting off or connecting the liquid inlet joint 11 and the liquid outlet joint 12, thereby controlling the cutoff or flow of the fluid in the channel, so as to achieve the closing or opening of the gate valve.
[0049] In an optional embodiment, if Figure 6 and Figure 7 As shown, a cylindrical connecting portion 23 is convexly provided at the top of the gate 20, a threaded hole 231 is provided in the connecting portion 23, and an external thread is provided at the bottom of the valve stem 40, and the valve stem 40 is threadedly connected to the threaded hole 231 through the external thread at the bottom of the valve stem 40. This arrangement facilitates the threaded connection between the valve stem 40 and the gate 20, so that the gate 20 can be moved up and down in the gate cavity 13 by rotating the valve stem 40.
[0050] In an optional embodiment, if Figure 2As shown, a protrusion 41 is convexly provided on the circumferential side of the valve stem 40, and a matching hole 31 is provided on the top of the valve cover 30. After the bottom end of the valve stem 40 passes through the matching hole 31, the protrusion 41 is rotatably arranged in the matching hole 31. The gate valve also includes a gland 60, which is threadedly connected to the valve cover 30. The gland 60 is provided with a through hole 61 for the valve stem 40 to pass through, and the aperture of the through hole 61 is smaller than the outer diameter of the protrusion 41. The matching of the matching hole 31 and the protrusion 41 can limit the downward movement of the valve stem 40, and the gland 60 can limit the upward movement of the valve stem 40. Therefore, the above arrangement can limit the axial movement of the valve stem 40, so that the valve stem 40 can only rotate circumferentially relative to the valve cover 30, and the valve stem 40 can transmit its circumferential rotation to the gate 20, so that the gate 20 rises or falls in the gate cavity 13 along the thread of the valve stem 40.
[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A gate valve, comprising a valve body (10) and a gate (20), wherein the valve body (10) comprises a gate cavity (13), wherein the gate (20) is slidably disposed in the gate cavity (13), wherein the gate (20) comprises two oppositely disposed sealing surfaces (24) and a gate side surface (26) connected between the two sealing surfaces (24), wherein the gate cavity (13) comprises a first cavity wall (131) and a second cavity wall (132) which cooperate with the gate side surface (26) and are oppositely disposed, and wherein: At least two limiting parts for preventing the gate plate (20) from shaking are respectively arranged on the first cavity wall (131) and the second cavity wall (132).
2. The gate valve according to claim 1, characterized in that: The limiting portion is a limiting convex rib (14).
3. The gate valve according to claim 2, characterized in that: Two of the limiting convex ribs (14) are respectively arranged on the first cavity wall (131) and the second cavity wall (132), and the two limiting convex ribs (14) are arranged at intervals along the arrangement direction of the two sealing surfaces (24).
4. The gate valve according to any one of claims 1 to 3, characterized in that: The side surface (26) of the gate plate is provided with a limiting plane (21) on the side facing the first cavity wall (131) and the side facing the second cavity wall (132), respectively. The limiting plane (21) is parallel to the moving direction of the gate plate (20), and the limiting plane (21) on each side is slidably matched with the limiting portion on the corresponding side.
5. The gate valve according to claim 4, characterized in that: Two limiting planes (21) are respectively provided on the side of the gate plate (26) facing the first cavity wall (131) and the side facing the second cavity wall (132), and the two limiting planes (21) on each side are arranged at intervals along the arrangement direction of the two sealing surfaces (24), and a first groove (22) is provided between the two limiting planes (21) on each side.
6. The gate valve according to claim 5, characterized in that: The bottom of the gate plate (20) is also provided with a second groove (27).
7. The gate valve according to any one of claims 1 to 3, characterized in that: The gate valve further comprises a valve cover (30) and a valve stem (40), wherein the valve cover (30) is fixedly connected to the valve body (10), one end of the valve stem (40) is threadedly connected to the gate plate (20), and the other end of the valve stem (40) extends out of the valve cover (30), a convex portion (41) is convexly provided on the circumference of the valve stem (40), a matching hole (31) is provided at the top end of the valve cover (30), and the protrusion (41) is rotatably arranged in the matching hole (31), and the gate valve further comprises a pressure cover (60), wherein the pressure cover (60) is fixedly connected to the valve cover (30), and a through hole (61) is provided on the pressure cover (60) for the valve stem (40) to pass through, and the aperture of the through hole (61) is smaller than the outer diameter of the protrusion (41).
8. The gate valve according to claim 1, characterized in that: The limiting portion is a limiting groove, and the gate plate (20) is provided with a limiting protrusion that cooperates with the limiting groove.