Gate plate assembly and gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a gate plate assembly which comprises a gate plate body and at least one sealing piece, the sealing piece is detachably installed on the side wall of the gate plate body through a gland, and a sealing structure is arranged on the side, away from the gate plate body, of the sealing piece. A sealing gasket is arranged between the sealing piece and the side wall of the flashboard body, and the gland presses the sealing piece tightly so that the sealing gasket can abut against the flashboard body and the sealing piece respectively. Due to the arrangement of the flashboard assembly, the sealing piece can be detachably installed on the side wall of the flashboard body through the gland, and the sealing gasket is pressed between the flashboard body and the sealing piece, so that the left-right position of the sealing piece can be adjusted, and the sealing adjustability of the flashboard body is improved; the problems that the sealing face of the valve seat or the sealing face of the flashboard body is abraded and the sealing face of the corresponding flashboard body or the sealing face of the valve seat cannot be sealed are solved, and meanwhile the problems that the maintenance cost is increased, manufacturing is difficult, and the period cannot be guaranteed can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology, specifically a gate assembly and a gate valve. Background Technology

[0002] The gate of existing gate valves is a single piece. During use, the gate sealing surface or valve seat sealing surface will wear. When the sealing surface is worn to a certain extent or is damaged during use, the entire gate or valve needs to be replaced. Replacing the entire gate or valve is costly. If the sealing surface can be replaced separately, maintenance costs can be effectively reduced, the manufacturing cycle can be shortened significantly, and the product's competitiveness can be greatly increased. Therefore, there is an urgent need to design a gate assembly and gate valve to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a gate assembly that solves the problem mentioned above that when the gate sealing surface or valve seat sealing surface is worn to a certain extent or the sealing surface is damaged during use, it is necessary to replace the entire gate or the entire valve, which is costly.

[0004] To solve the above-mentioned technical problems, the present invention provides a gate assembly, the gate assembly including a gate body and at least one sealing element. The sealing element is detachably installed on the side wall of the gate body by a pressure cap. A sealing structure is provided on the side of the sealing element away from the gate body. A sealing gasket is provided between the sealing element and the side wall of the gate body. The pressure cap presses the sealing element so that the sealing gasket abuts against the gate body and the sealing element respectively.

[0005] Furthermore, the sealing element is annular, and its central hole has a first large-diameter hole and a small-diameter hole in sequence along the direction towards the gate body. A stepped surface is formed between the first large-diameter hole and the small-diameter hole. The pressure cap is installed on one side of the gate body by fasteners, and its side away from the gate body is located in the first large-diameter hole and abuts against the stepped surface.

[0006] Furthermore, the sealing element is annular, and its central hole has a first large-diameter hole, a small-diameter hole, and a second large-diameter hole in sequence along the direction towards the gate body. A square sealing groove for installing the sealing gasket is formed between the hole wall of the second large-diameter hole and the gate body.

[0007] Furthermore, the sealing gasket is a metal spiral wound sealing gasket.

[0008] Furthermore, a first annular groove is formed on the side wall of the gate body, and one side of the sealing element is disposed in the first annular groove.

[0009] Furthermore, the seals are arranged symmetrically along their thickness direction.

[0010] Furthermore, the gate body has a clearance groove on the side facing the seal, and the sealing structure of the seal facing the gate body is located in the clearance groove, with a clearance gap between it and the bottom of the clearance groove.

[0011] Furthermore, the sealing structure is a structure formed by welding metal material to the side of the sealing element.

[0012] Furthermore, the gate assembly includes two seals, which are symmetrically arranged on both sides of the gate body.

[0013] A gate valve includes a valve body, two valve seats disposed within the valve body, and a gate assembly, wherein two sealing elements of the gate assembly are respectively used for sealing cooperation with the two valve seats.

[0014] The beneficial effects of this utility model are as follows: The gate assembly of this utility model allows the sealing element to be detachably installed on the side wall of the gate body through the pressure cap, and the sealing gasket is pressed between the gate body and the sealing element. This allows the left and right positions of the sealing element to be adjusted, improving the adjustability of the gate body seal. It solves the problem that the sealing surface of the valve seat or the sealing surface of the gate body is worn and the corresponding sealing surface of the gate body or the sealing surface of the valve seat cannot achieve a seal. At the same time, it can also avoid the problems of increased maintenance costs and difficulty in guaranteeing the manufacturing cycle.

[0015] The sealing element is designed with a first large-diameter hole on the side away from the gate body for installing a gland, and a stepped surface to prevent the gland from directly contacting the gasket. By adjusting gaskets of different thicknesses, the fit between the sealing structure on the sealing element and the valve seat sealing surface can be adjusted, thereby improving the adjustability of the gate body seal. The second large-diameter hole in the sealing element, closer to the gate body, allows the gland to press the gasket between the second large-diameter hole and the gate body during the tightening process. This better prevents the gasket from shifting away from the sealing element and the gate body, thus providing better control over the position of the gasket. The structural design of the sealing element ensures a seal between the sealing element and the gate body.

[0016] The seal is symmetrically arranged along its thickness direction, making both sides of the seal symmetrical in the thickness direction. At the same time, the sealing structure on the side of the seal is also symmetrically arranged along the thickness direction. This allows the seal to be adjusted left and right by the sealing gasket, and also allows the seal to be flipped left and right for double-sided interchange to reduce maintenance costs.

[0017] The clearance groove on the side of the gate body allows the seal and the sealing structure facing the gate body to be placed in the clearance groove. There is a clearance between the sealing structure and the bottom of the clearance groove, which prevents the sealing structure at the end of the seal from being crushed or abraded when the gland is pressed against the seal. This ensures that the seal can be used normally after being flipped over, and that the sealing performance will not be affected by crushing or abrasion. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an overall structural diagram of a gate assembly according to an embodiment of this utility model;

[0020] Figure 2 This is a side view of a gate assembly according to an embodiment of the present utility model;

[0021] Figure 3 This is a cross-sectional view of AA of a gate assembly according to an embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional view of the removal of the sealing element and the pressure cap of a gate assembly according to an embodiment of this utility model;

[0023] In the figure: 1-gate assembly, 11-gate body, 12-gland, 13-seal, 14-sealing structure, 15-sealing gasket, 17-fastener, 111-first annular groove, 112-avoidance groove. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The following will describe a specific embodiment of this utility model and its appendix. Figure 1-4To provide a detailed description, a gate assembly is specifically disclosed. The gate assembly 1 includes a gate body 11 and at least one sealing element 13. The sealing element 13 is detachably mounted on the side wall of the gate body 11 via a pressure cap 12. In this embodiment, the sealing element 13 is a sealing ring. The sealing ring can be provided on the pressure-bearing side of the gate body 11, or on both sides of the gate body 11. A sealing structure 14 is provided on the side of the sealing element 13 away from the gate body 11. The sealing structure is a structure formed by welding metal material to the side of the sealing element 13. In this embodiment, there are four sealing structures 14, and the four sealing structures 14 are grouped in pairs. Each group of sealing structures 14 is welded to both ends of each sealing element 13. The sealing element 13 and the gate body are connected. A sealing gasket 15 is provided between the side walls of the gate body 11. The sealing gasket 15 is a metal spiral wound sealing gasket. The cover 12 presses the sealing element 13 so that the sealing gasket 15 abuts against the gate body 11 and the sealing element 13 respectively. The gate assembly 1 is configured so that the sealing element 13 can be detachably installed on the side wall of the gate body 11 through the cover 12, and the sealing gasket 15 is pressed between the gate body 11 and the sealing element 13. This allows for adjustment of the left and right position of the sealing element 13, improves the adjustability of the seal of the gate body 11, and solves the problem that the sealing surface of the valve seat or the sealing surface of the gate body 11 is worn and cannot achieve a seal with the corresponding sealing surface of the gate body 11 or the sealing surface of the valve seat. At the same time, it can also avoid the problems of increased maintenance costs and difficulty in guaranteeing the manufacturing cycle.

[0026] The seal 13 is annular, and its central hole has a first large diameter hole and a small diameter hole in sequence along the direction towards the gate body 11. A stepped surface is formed between the first large diameter hole and the small diameter hole. The gland 12 is installed on one side of the gate body 11 by fasteners 17, and its side away from the gate body 11 is located in the first large diameter hole and abuts against the stepped surface.

[0027] The sealing element 13 is annular, and its central hole has a first large diameter hole, a small diameter hole and a second large diameter hole in sequence along the direction towards the gate body 11. The hole wall of the second large diameter hole forms a square sealing groove for installing the sealing gasket 15 between it and the gate body 11.

[0028] The sealing element 13 is designed with a first large-diameter hole for mounting the gland 12 on the side away from the gate body 11, and a stepped surface to prevent the gland 12 from directly contacting the sealing gasket 15. By adjusting the sealing gaskets 15 of different thicknesses, the fit between the sealing structure 14 on the sealing element 13 and the valve seat sealing surface can be adjusted, thereby improving the adjustability of the gate body 11 seal. The second large-diameter hole in the sealing element 13 near the gate body 11 allows the gland 12 to press the sealing gasket 15 between the second large-diameter hole and the gate body 11 during the tightening process. This better prevents the sealing gasket 15 from shifting away from the sealing element 13 and the gate body 11, thus better controlling the position of the sealing gasket 15. The structural design of the sealing element 15 can simultaneously ensure the seal between the sealing element 13 and the gate body 11.

[0029] A first annular groove 111 is provided on the side wall of the gate body 11, and the sealing element 13 is disposed in the first annular groove 111. In this embodiment, the two side walls of the gate body 11 are provided with the first annular groove 111, and each pressure cap 12 is disposed in the first annular groove 111 on the corresponding side, and presses the stepped surface formed between the first large diameter hole and the small diameter hole in the sealing element 13 on the corresponding side, and presses the stepped surface formed between the second large diameter hole and the small diameter hole of the sealing element 13 against the bottom of the groove of the first annular groove 111. At the same time, the inner end of the sealing element 13 is located in the clearance groove 112 on the corresponding side. The sealing element 13 is symmetrically arranged along its thickness direction, so that the two sides of the sealing element 13 are symmetrical in the thickness direction. At the same time, the sealing structure 14 on the side of the sealing element 13 is also symmetrically arranged along the thickness direction of the sealing element 13. Thus, the sealing element 13 can be adjusted to the left and right position by the sealing gasket 15, and can also be flipped left and right to achieve double-sided interchangeability to reduce maintenance costs.

[0030] Both first annular grooves 111 have clearance grooves 112 at their bottoms. The sealing structure 14 of the sealing element 13 facing the gate body 11 is located in the clearance groove 112, and there is a clearance gap between it and the bottom of the clearance groove 112. The clearance groove 112 on the side of the gate body 11 allows the sealing element 13 and the sealing structure 14 of the sealing element 13 facing the gate body 11 to be placed in the clearance groove 112. The clearance gap between the sealing structure 14 and the bottom of the clearance groove 112 ensures that when the pressure cap 12 presses the sealing element 13, the sealing structure 14 at the end of the sealing element 13 will not be damaged or worn on the bottom of the clearance groove 112. This ensures that the sealing element 13 can be used normally after being flipped over, and that the sealing performance will not be affected by damage or wear.

[0031] The gate assembly 1 includes two seals 13, which are symmetrically arranged with respect to the gate body 11 and are both disposed in the first annular groove 111.

[0032] A gate valve includes a valve body, two valve seats disposed within the valve body, and a gate assembly 1, wherein two sealing elements 13 of the gate assembly 1 are respectively used for sealing cooperation with the two valve seats.

[0033] The working process of this utility model:

[0034] As needed, seals 13 can be installed on one or both sides of the gate body 11. If seals 13 are installed on both sides of the gate body 11, the thickness of the two sealing gaskets 15 is selected according to the requirements. First, the two sealing gaskets 15 are respectively placed into the second large diameter holes of the seals 13, and the stepped surface formed between the second large diameter hole and the small diameter hole of each seal 13 is in contact with one side of the corresponding sealing gasket 15. Then, the ends of the two seals 13 with sealing gaskets 15 are respectively installed in the clearance grooves 112 on both sides of the gate body 11, and each seal... The gasket 15 is in contact with the inner bottom surface of the first annular groove 111. At this time, there is a gap between each seal 13 and the bottom of the relief groove 112. One side of each cap 12 extends into the first annular groove 111, and the inner side of the boss on the other side contacts the stepped surface formed between the first large diameter hole and the small diameter hole. The cap 12 is tightened to the side of the gate body 11 by fastener 17. While tightening, each seal 13 does not contact the bottom of the relief groove 112, thereby preventing the seal 13 from entering and protecting the sealing structure 14 at the end of the seal 13.

[0035] After installation, the gate body 11 with the sealing element 13 installed is inserted into the gate valve so that the sealing surfaces of the sealing elements 13 on both sides of the gate body 11 fit with the sealing surfaces of the valve seat to achieve sealing.

[0036] When the sealing surface of the seal 13 is worn to a certain extent or damaged during use, the corresponding seal 13 is turned left or right and installed in the above installation method so that the sealing surface on the other side of the seal 13 fits with the sealing surface of the valve seat to achieve a new seal and improve the adjustability of the gate valve.

[0037] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A gate assembly, characterized in that, The gate assembly (1) includes a gate body (11) and at least one sealing element (13). The sealing element (13) is detachably mounted on the side wall of the gate body (11) via a pressure cap (12). A sealing structure (14) is provided on the side of the sealing element (13) away from the gate body (11). A sealing gasket (15) is provided between the sealing element (13) and the side wall of the gate body (11). The pressure cap (12) presses the sealing element (13) so that the sealing gasket (15) abuts against the gate body (11) and the sealing element (13) respectively.

2. A gate assembly according to claim 1, characterized in that, The sealing element (13) is annular, and its central hole has a first large diameter hole and a small diameter hole in sequence along the direction towards the gate body (11). A stepped surface is formed between the first large diameter hole and the small diameter hole. The pressure cap (12) is installed on one side of the gate body (11) by fasteners (17), and its side away from the gate body (11) is located in the first large diameter hole and abuts against the stepped surface.

3. A gate assembly according to claim 2, characterized in that, The central hole of the seal (13) has a first large diameter hole, a small diameter hole and a second large diameter hole in sequence along the direction toward the gate body (11), and a square sealing groove for installing the sealing gasket (15) is formed between the hole wall of the second large diameter hole and the gate body (11).

4. A gate assembly according to claim 1, characterized in that, The sealing gasket (15) is a metal spiral wound sealing gasket.

5. A gate assembly according to claim 1, characterized in that, The gate body (11) has a first annular groove (111) on its side wall, and one side of the seal (13) is disposed in the first annular groove (111).

6. A gate assembly according to claim 1, characterized in that, The sealing element (13) is symmetrically arranged along its thickness direction, and the sealing structure (14) is provided on both sides of the sealing element (13), and the two sealing structures (14) are symmetrically arranged with respect to the sealing element (13).

7. A gate assembly according to claim 6, characterized in that, The gate body (11) has a clearance groove (112) on the side facing the seal (13). The sealing structure (14) of the seal (13) facing the gate body (11) is located in the clearance groove (112) and there is a clearance gap between it and the bottom of the clearance groove (112).

8. A gate assembly according to claim 1, characterized in that, The sealing structure (14) is a structure formed by welding metal material to the side of the sealing element (13).

9. A gate assembly according to any one of claims 1-8, characterized in that, The gate assembly (1) includes two seals (13), which are symmetrically arranged on both sides of the gate body (11).

10. A gate valve, characterized in that, The gate valve includes a valve body, two valve seats disposed in the valve body, and a gate assembly (1) as described in any one of claims 1-9, wherein the two seals (13) of the gate assembly (1) are respectively used to seal with the two valve seats.

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