A leak-proof stop valve

Abstract

The utility model discloses a leakproof stop valve, including the valve body, the bolt joint has the valve cover on the valve body, the fixed connection frame is established on the valve cover, the top rotation of connection frame is installed with hand wheel, and the bottom movable mounting of hand wheel has the valve stem, the inside of valve body is provided with the valve core, and the top of connection column is installed with the valve core, and the top of connection column is fixedly connected with the bottom of valve stem, the bottom of valve core is provided with the sealing assembly, and the filter assembly also can be detachably installed in the valve body, the filter assembly includes the filter cylinder, and the bottom of filter cylinder is fixed with the plug, the sealing assembly includes two groups of support seat that install on the inner wall of the inner chamber of valve body, and the sealing element is installed between two groups of support seat, and the inclined plane is integrally formed on the support seat, the utility model discloses through the double sealing design of sealing assembly and diaphragm, reduces medium leakage risk, solved the problem that the traditional stop valve long -term use sealing performance deteriorates, the filter assembly can effectively intercept the impurity in medium, avoids the key components such as valve core, sealing element and so on and is abraded or blocked up.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a leak-proof shut-off valve. Background Technology

[0002] Gate valves are used to cut off or allow flow of a medium. By rotating the valve stem, the valve stem moves linearly along the center line of the valve seat. Because the valve stem of this type of valve has a relatively short opening or closing stroke and has a very reliable shut-off function, it is suitable for controlling the flow rate of the medium.

[0003] Currently, the sealing performance of gate valves is poor during long-term use, which may lead to leakage of fluid media and affect the service life of the gate valve. There is room for improvement. Utility Model Content

[0004] The main objective of this invention is to provide a leak-proof shut-off valve to solve the aforementioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof shut-off valve, comprising a valve body, a valve cover bolted to the valve body, a connecting frame fixedly mounted on the valve cover, a handwheel rotatably mounted on the top of the connecting frame, and a valve stem movably mounted on the bottom of the handwheel; a valve core is provided inside the valve body, a connecting post is mounted on the top of the valve core, and the top of the connecting post is fixedly connected to the bottom of the valve stem; a sealing assembly is provided at the bottom of the valve core, and a filter assembly can be detachably installed inside the valve body; The filter assembly includes a filter cartridge, and a plug is fixed to the bottom of the filter cartridge; The sealing assembly includes two sets of support seats symmetrically installed on the inner wall of the valve body cavity, with a sealing element installed between the two sets of support seats, and an inclined surface integrally formed on the support seats.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the sealing element includes a fixing part, a fitting part and a sealing part, the fixing part is interference-fitted with the support base, the fitting part is fitted with the inclined surface of the support part; the sealing part has an arc-shaped structure.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: a diaphragm is installed between the valve body and the valve cover.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the filter cylinder is slidably connected to the inner cavity of the valve body, and the plug is threadedly connected to the valve body.

[0009] The beneficial effects of this utility model are as follows: This utility model reduces the risk of media leakage through the dual sealing design of the sealing component and the diaphragm, and solves the problem of the deterioration of the sealing performance of traditional gate valves after long-term use; the filter component can effectively intercept impurities in the media, avoid wear or blockage of key components such as valve core and seals, reduce the probability of failure, and extend the overall service life. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is the utility model Figure 2 Enlarged diagram of point A in the middle. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0012] See attached diagram. Figures 1 to 3 In this embodiment, a leak-proof shut-off valve includes a valve body (1), a valve cover (2) bolted to the valve body (1), a connecting frame (3) fixedly mounted on the valve cover (2), a handwheel (4) rotatably mounted on the top of the connecting frame (3), and a valve stem (6) movably mounted on the bottom of the handwheel (4); a valve core (5) is provided inside the valve body (1), a connecting column (50) is installed on the top of the valve core (5), and the top of the connecting column (50) is fixedly connected to the bottom of the valve stem (6); a sealing assembly (7) is provided at the bottom of the valve core (5), and a filter assembly can also be detachably installed inside the valve body (1); The filter assembly includes a filter cartridge (8), and a plug (80) is fixed to the bottom of the filter cartridge (8); The sealing assembly (7) includes two sets of support seats (70) symmetrically installed on the inner wall of the valve body (1), with a seal installed between the two sets of support seats (70), and an inclined surface integrally formed on the support seat (70).

[0013] Furthermore, the sealing element includes a fixing part (71), a fitting part (72) and a sealing part (73). The fixing part (71) is connected to the support seat (70) with an interference fit, the fitting part (72) is fitted to the inclined surface of the support seat, and the sealing part (73) has an arc-shaped structure.

[0014] Furthermore, a diaphragm (10) is installed between the valve body (1) and the valve cover (2).

[0015] Furthermore, the filter cartridge (8) is slidably connected to the inner cavity of the valve body (1), and the plug (80) is threadedly connected to the valve body (1).

[0016] When in use, turn the handwheel 4 on the top of the connecting frame 3 to drive the valve stem 6 at the bottom to move in a straight line. The valve stem 6 is fixedly connected to the valve core 5 through the connecting column 50, thereby driving the valve core 5 to move up and down in the valve body 1 to complete the opening or closing of the valve. When the valve is closed, the valve core 5 moves downward and squeezes the sealing component. The fitting part 72 of the sealing component fits tightly with the integrally formed inclined surface of the support seat 70. The fixing part 71 is firmly connected to the support seat 70 through interference fit. The arc-shaped sealing part further prevents media leakage. When the valve is opened, the medium enters the valve body 1 and first flows through the detachable filter assembly. The filter cylinder 8 intercepts and filters impurities in the medium to prevent impurities from wearing down the valve core, seals and other core components. The filter cylinder 8 is slidably connected to the inner cavity of the valve body, and the bottom plug 80 is threadedly connected to the valve body for easy disassembly and cleaning.

[0017] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A leak-proof shut-off valve, characterized in that: The valve body (1) is bolted to a valve cover (2), and a connecting frame (3) is fixedly mounted on the valve cover (2). A handwheel (4) is rotatably mounted on the top of the connecting frame (3), and a valve stem (6) is movably mounted on the bottom of the handwheel (4). A valve core (5) is provided inside the valve body (1), and a connecting column (50) is installed on the top of the valve core (5). The top of the connecting column (50) is fixedly connected to the bottom of the valve stem (6). A sealing assembly (7) is provided at the bottom of the valve core (5), and a filter assembly can be detachably installed inside the valve body (1). The filter assembly includes a filter cartridge (8), and a plug (80) is fixed to the bottom of the filter cartridge (8); The sealing assembly (7) includes two sets of support seats (70) symmetrically installed on the inner wall of the valve body (1), with a seal installed between the two sets of support seats (70), and an inclined surface integrally formed on the support seat (70).

2. The leak-proof shut-off valve according to claim 1, characterized in that: The sealing element includes a fixing part (71), a fitting part (72) and a sealing part (73). The fixing part (71) is connected to the support base (70) with an interference fit. The fitting part (72) fits against the inclined surface of the support base. The sealing part (73) has an arc-shaped structure.

3. The leak-proof shut-off valve according to claim 1, characterized in that: A diaphragm (10) is installed between the valve body (1) and the valve cover (2).

4. The leak-proof shut-off valve according to claim 1, characterized in that: The filter cylinder (8) is slidably connected to the inner cavity of the valve body (1), and the plug (80) is threadedly connected to the valve body (1).

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