Valve seat concave-convex groove positioning structure

Abstract

The utility model provides a valve seat concave-convex groove positioning structure. A valve plate is fixedly sleeved on the periphery of a valve shaft, a valve seat is arranged on an inner ring of a valve body, the periphery of the valve plate can abut against the inner ring of the valve seat, a plurality of first annular protrusions and / or first annular grooves are arranged on the inner ring of the valve body in the axial direction, and second annular grooves and / or second annular protrusions are arranged on the periphery of the valve seat in the axial direction. The first annular protrusions correspond to the second annular grooves in a one-to-one mode, the first annular protrusions can be connected into the second annular grooves in a clamped mode, the second annular protrusions correspond to the first annular grooves in a one-to-one mode, and the second annular protrusions can be connected into the first annular grooves in a clamped mode. According to the concave-convex groove positioning structure of the valve seat, the outer edge of the valve plate needs to be sealed by extruding the inner ring of the valve seat, the first annular protrusions and the first annular grooves are arranged, and the second annular protrusions and the second annular grooves are matched with the first annular protrusions and the first annular grooves, so that when the valve plate extrudes the valve seat, displacement strain of the valve seat can be avoided, and the sealing performance of the valve seat is improved. The sealing performance of the butterfly valve is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of butterfly valves, in particular to a valve seat concave-convex groove positioning structure. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve features a disc-shaped closing element (disc or disc) that rotates around the valve axis to open and close. The valve can be used to control the flow of various fluids, including air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. It primarily serves as a shutoff and throttling mechanism in pipelines. The opening and closing element of a butterfly valve is a disc-shaped disc that rotates around its axis within the valve body, achieving opening, closing, or regulating functions.

[0003] The butterfly valve in the prior art needs to form a cut-off and sealed passage by squeezing the outer edge of the valve plate and the inner ring of the valve seat during use. Due to the large mass and outer diameter of the valve seat itself, a large extrusion force will be applied to the valve seat when closed, and the valve seat is usually fixed to the valve body by clamping. In order to facilitate installation, the number of clamping grooves needs to be minimized and the depth of the clamping grooves also needs to be reduced. However, the fewer the number of clamping grooves and the shallower the clamping grooves are due to the squeezing of the valve plate, the easier it is for the valve seat to shift. This problem is particularly prominent in the application of butterfly valves with large diameters. Utility Model Content

[0004] In view of this, the utility model aims to propose a valve seat concave-convex groove positioning structure to solve the problem of the butterfly valve in the prior art that the valve seat is easily displaced when the valve plate squeezes the valve seat, resulting in poor valve sealing and reduced service life.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A valve seat concave-convex groove positioning structure includes a valve body, a valve seat and a valve plate, and the valve body is rotatably sleeved on the valve shaft, the valve plate is fixedly sleeved on the periphery of the valve shaft, and a valve seat is provided on the inner ring of the valve body, the outer periphery of the valve plate can abut against the inner ring of the valve seat, a plurality of first annular protrusions and / or first annular grooves are axially provided on the inner ring of the valve body, and a plurality of second annular grooves and / or second annular protrusions are axially provided on the periphery of the valve seat, the first annular protrusions correspond one-to-one to the second annular grooves, the first annular protrusions can be snapped into the second annular grooves, the second annular protrusions correspond one-to-one to the first annular grooves, and the second annular protrusions can be snapped into the first annular grooves.

[0007] Furthermore, the inner ring of the valve body is provided with a first annular protrusion and a first annular groove along the axial direction, and the first annular protrusion and the first annular groove are arranged alternately.

[0008] Furthermore, two first annular protrusions are axially arranged on the inner ring of the valve body, and a first annular groove is arranged between the two first annular protrusions.

[0009] Furthermore, the valve seat is made of rubber.

[0010] Furthermore, the cross section of the valve seat is a U-shaped structure, and both side walls of the U-shaped structure are respectively fitted to the two end surfaces of the valve body.

[0011] Furthermore, a through hole is provided on the valve seat, and one end of the valve shaft passes through the through hole and then the valve plate is installed.

[0012] Furthermore, a sealing rubber ring is provided in the through hole, and the outer periphery of the valve shaft is sealed and connected to the through hole through the sealing rubber ring.

[0013] Furthermore, the sealing rubber ring, the second annular protrusion and the valve seat are an integrated structure.

[0014] Compared with the prior art, the valve seat concave-convex groove positioning structure described in the present invention has the following features:

[0015] Beneficial effects:

[0016] (1) The utility model describes a valve seat concave-convex groove positioning structure, in which the outer edge of the valve plate needs to be sealed by squeezing the inner ring of the valve seat. By providing a plurality of first annular protrusions and first annular grooves and coordinating with second annular protrusions and second annular grooves, the valve seat displacement strain can be avoided when the valve plate squeezes the valve seat, thereby improving the sealing performance and service life of the butterfly valve.

[0017] (2) The utility model describes a valve seat concave-convex groove positioning structure, in which first annular protrusions are respectively provided on both sides of the first annular groove, so that the height of the first annular protrusion can be used to increase the side wall height of the first annular groove, and the second annular protrusion is more firmly connected to the first annular groove. At the same time, the value of the expansion of the outer diameter of the second annular protrusion relative to the inner ring of the valve body is reduced, which is convenient for the staff to assemble the valve seat and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a structural schematic diagram of a valve seat concave-convex groove positioning structure according to an embodiment of the present utility model;

[0020] Figure 2 This is a structural diagram of the valve body according to an embodiment of the present utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of the valve body according to an embodiment of the present utility model;

[0022] Figure 4 This is a structural schematic diagram of the valve seat described in an embodiment of the present utility model.

[0023] Description of reference numerals:

[0024] 1-valve body; 11-first annular protrusion; 12-first annular groove; 2-valve shaft; 3-valve seat; 31-second annular protrusion; 32-second annular groove; 33-sealing rubber ring; 34-side wall; 4-valve plate. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "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, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0029] like Figure 1-Figure 4As shown, a valve seat concave-convex groove positioning structure includes a valve body 1, a valve seat 3 and a valve plate 4, and the valve body 1 is rotatably sleeved with a valve shaft 2, the periphery of the valve shaft 2 is fixedly sleeved with a valve plate 4, and the inner ring of the valve body 1 is provided with a valve seat 3, the periphery of the valve plate 4 can abut against the inner ring of the valve seat 3, the inner ring of the valve body 1 is axially provided with a plurality of first annular protrusions 11 and / or first annular grooves 12, and the periphery of the valve seat 3 is axially provided with a plurality of second annular grooves 32 and / or second annular protrusions 31, the first annular protrusions 11 and the second annular grooves 32 are one-to-one corresponding to each other, and the first annular protrusions 11 can be snapped into the second annular grooves 32. In the shaped groove 32, the second annular protrusion 31 corresponds to the first annular groove 12 one by one, and the second annular protrusion 31 can be snapped into the first annular groove 12. The inner ring of the butterfly valve body 1 of this embodiment is greater than 0.5m. During production and installation, the outer edge of the valve plate 4 needs to be sealed by squeezing the inner ring of the valve seat 3. By providing multiple first annular protrusions 11 and first annular grooves 12 and cooperating with the second annular protrusions 31 and the second annular grooves 32, the valve plate 4 can avoid displacement strain of the valve seat 3 when squeezing the valve seat 3, so as to improve the sealing performance and service life of the butterfly valve.

[0030] The inner ring of the valve body 1 of this embodiment is provided with a first annular protrusion 11 and a first annular groove 12 along the axial direction, and the first annular protrusion 11 and the first annular groove 12 are arranged alternately, and as shown in FIG. Figure 2 As shown, two first annular protrusions 11 are provided in the inner ring of the valve body 1 along the axial direction, and a first annular groove 12 is provided between the two first annular protrusions 11. Figure 3 As shown, first annular protrusions 11 are respectively provided on both sides of the first annular groove 12, so that the height of the first annular protrusion 11 can be used to increase the height of the side wall 34 of the first annular groove 12, and the second annular protrusion 31 is more firmly connected to the first annular groove 12. At the same time, the value of the second annular protrusion 31 relative to the outer diameter of the inner ring of the valve body 1 is reduced, which facilitates the staff to assemble the valve seat 3 and the valve body 1. Figure 3 As shown, the height of the first annular protrusion 11 is A, the depth of the corresponding second annular groove 32 is A, the depth of the first annular groove is B, and the corresponding height of the second annular protrusion 31 is B. The maximum outer diameter of the valve seat 3 that penetrates into the inner ring of the valve body 1 is the second annular protrusion 31, but the difference between it and the inner diameter of the valve body 1 is BA. This height does not affect the installation of the staff, but can make the valve body 1 and the valve seat 3 firmly connected, and the valve seat 3 of this embodiment has a certain deformation ability. The material of the valve seat 3 of this embodiment is rubber.

[0031] The cross-section of the valve seat 3 is a U-shaped structure, and the two side walls 34 of the U-shaped structure are respectively fitted to the two end surfaces of the valve body 1. During installation, the valve body 1 can be fixed to the upstream and downstream pipelines by clamping. The two side walls 34 of the valve seat 3 are respectively fitted to the two end surfaces of the valve body 1, which can increase the sealing performance of the clamping interface and at the same time make the valve seat 3 firmly installed in the valve body 1 to prevent the valve seat 3 from shifting.

[0032] A through hole is provided on the valve seat 3, and the valve plate 4 is installed after one end of the valve shaft 2 passes through the through hole. A sealing rubber ring 33 is provided in the through hole, and the outer periphery of the valve shaft 2 is sealed to the through hole through the sealing rubber ring 33. The sealing rubber ring 33 is used to increase the sealing performance of this part, and in order to facilitate production, the sealing rubber ring 33, the second annular protrusion 31 and the valve seat 3 are an integrated structure.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve seat concave-convex groove positioning structure, comprising a valve body (1), a valve seat (3) and a valve plate (4), wherein the valve body (1) is rotatably sleeved with a valve shaft (2), the periphery of the valve shaft (2) is fixedly sleeved with the valve plate (4), and the inner ring of the valve body (1) is provided with a valve seat (3), and the periphery of the valve plate (4) can abut against the inner ring of the valve seat (3), characterized in that: A plurality of first annular protrusions (11) and / or first annular grooves (12) are axially arranged on the inner ring of the valve body (1), and a plurality of second annular grooves (32) and / or second annular protrusions (31) are axially arranged on the outer periphery of the valve seat (3), the first annular protrusions (11) correspond one-to-one with the second annular grooves (32), and the first annular protrusions (11) can be snapped into the second annular grooves (32), the second annular protrusions (31) correspond one-to-one with the first annular grooves (12), and the second annular protrusions (31) can be snapped into the first annular grooves (12).

2. A valve seat concave-convex groove positioning structure according to claim 1, characterized in that: The inner ring of the valve body (1) is provided with a first annular protrusion (11) and a first annular groove (12) along the axial direction, and the first annular protrusion (11) and the first annular groove (12) are arranged alternately.

3. The valve seat concave-convex groove positioning structure according to claim 1, characterized in that: Two first annular protrusions (11) are axially arranged on the inner ring of the valve body (1), and a first annular groove (12) is arranged between the two first annular protrusions (11).

4. The valve seat concave-convex groove positioning structure according to claim 1, characterized in that: The material of the valve seat (3) is rubber.

5. The valve seat concave-convex groove positioning structure according to claim 1, characterized in that: The cross section of the valve seat (3) is a U-shaped structure, and the two side walls (34) of the U-shaped structure are respectively fitted to the two end surfaces of the valve body (1).

6. The valve seat concave-convex groove positioning structure according to claim 1, characterized in that: A through hole is provided on the valve seat (3), and one end of the valve shaft (2) passes through the through hole and then the valve plate (4) is installed.

7. A valve seat concave-convex groove positioning structure according to claim 6, characterized in that: A sealing rubber ring (33) is arranged in the through hole, and the periphery of the valve shaft (2) is sealed and connected to the through hole through the sealing rubber ring (33).

8. The valve seat concave-convex groove positioning structure according to claim 7, characterized in that: The sealing rubber ring (33), the second annular protrusion (31) and the valve seat (3) are an integral structure.

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