Valve seat and eccentric butterfly valve with same

Abstract

The utility model relates to the technical field of water system valves, in particular to a valve seat and an eccentric butterfly valve with the same. The valve seat comprises an annular main body part, the inner side of the main body part is connected with a limiting protrusion, the limiting protrusion extends towards the inner side of the main body part, and the thickness of the limiting protrusion is not larger than that of the main body part; the clamping bosses are connected to the two faces of the main body part respectively, and the clamping bosses are arranged close to the inner side of the main body part. The main body part is clamped between the butterfly plate and the compression ring through the pair of clamping bosses, and the limiting bulge on the inner side of the main body part extends towards the centers of the butterfly plate and the compression ring. In the under-pressure opening state, the limiting protrusion arranged on the valve seat can be matched with the butterfly plate and the pressing ring for limiting, and when the main body part is subjected to lateral pressure, the movement trend that the main body part moves towards one side is overcome, so that the valve seat can bear larger pressure, and the situation that the valve seat is extruded out of the butterfly plate and the pressing ring in the under-pressure opening state is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water system valves, in particular to a valve seat and an eccentric butterfly valve having the same. Background Art

[0002] The valve stem axis in the double eccentric butterfly valve structure deviates from both the center of the butterfly plate and the center of the body. The double eccentric effect enables the butterfly plate to quickly separate from the valve seat after the valve is opened, greatly eliminating unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat, reducing the opening resistance, reducing wear, and increasing the life of the valve seat.

[0003] In the sealing structure of the double eccentric butterfly valve, the sealing surface of the butterfly plate and the valve seat is in line contact. The butterfly plate squeezes the valve seat to make the valve seat elastically deformed, so that the valve port on the valve body abuts against the valve seat to produce a sealing effect. Therefore, the double eccentric butterfly valve has very high requirements for the closed position and low pressure bearing capacity. In the open state with pressure, the valve seat will be squeezed out from between the butterfly plate and the pressure ring under the action of fluid pressure, causing the valve to fail. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the double eccentric butterfly valve in the prior art that the valve seat is at risk of being squeezed out from between the butterfly plate and the pressure ring when the double eccentric butterfly valve is opened under pressure, thereby providing a valve seat and an eccentric butterfly valve having the same.

[0005] In order to solve the above technical problems, the utility model provides a valve seat, comprising:

[0006] The main body is annular, the inner side of the main body is connected to a limiting protrusion, the limiting protrusion extends toward the inner side of the main body, and the thickness of the limiting protrusion is not greater than the thickness of the main body;

[0007] A pair of clamping bosses are respectively connected to two sides of the main body, and the clamping bosses are arranged close to the inner side of the main body.

[0008] Optionally, a pair of the clamping bosses both extend from the inner side edge of the main body toward the outer side edge of the main body, and an extension distance of one of the clamping bosses is greater than an extension distance of the other clamping boss.

[0009] Optionally, the clamping boss with a longer extension distance is suitable for clamping cooperation with the butterfly plate, and the clamping boss with a shorter extension distance is suitable for clamping cooperation with the pressure ring.

[0010] The utility model also provides an eccentric butterfly valve, which has the valve seat described in the utility model.

[0011] Optionally, it also includes a fixedly matched butterfly plate and a pressure ring, the butterfly plate and the pressure ring are arranged in parallel, the valve seat is clamped and installed between the butterfly plate and the pressure ring, and the main body of the valve seat extends from the side of the limiting boss to the outside of the outer edge of the pressure ring and the butterfly plate.

[0012] Optionally, an adjustment gap is reserved between the butterfly plate and the pressure ring.

[0013] Optionally, it further comprises a valve body, on which a valve port is arranged, the valve seat is mounted on the valve port, and the side of the valve seat facing away from the limiting boss is suitable for abutting and sealing with the inner side wall of the valve port.

[0014] Optionally, a limit sleeve is installed on the valve port of the valve body, and the butterfly plate is suitable for abutting against the limit sleeve for limiting position.

[0015] Optionally, a limiting notch is provided on a surface of the butterfly plate facing away from the pressure ring, and the limiting notch is suitable for cooperating and abutting with the limiting sleeve.

[0016] Optionally, a first groove is provided on a surface of the butterfly plate facing the pressure ring, a second groove is provided on a surface of the pressure ring facing the butterfly plate, and a pair of clamping bosses of the valve seat are respectively installed in the first groove and the second groove.

[0017] The technical solution of the utility model has the following advantages:

[0018] 1. The valve seat provided by the utility model includes: a main body, which is annular, with a limiting protrusion connected to the inner side of the main body, the limiting protrusion extends toward the inner side of the main body, and the thickness of the limiting protrusion is not greater than the thickness of the main body; a pair of clamping bosses, respectively connected to the two sides of the main body, and the clamping bosses are arranged close to the inner side of the main body.

[0019] When the valve seat is installed in cooperation with the butterfly plate and the pressure ring, the main body is clamped and installed between the butterfly plate and the pressure ring through a pair of clamping bosses, and the limiting protrusion on the inner side of the main body extends toward the center of the butterfly plate and the pressure ring. Under the extrusion of the butterfly plate and the pressure ring, the side of the main body away from the limiting protrusion protrudes outward to seal with the valve port on the valve body. In the open state with pressure, the limiting protrusion set on the valve seat can cooperate with the butterfly plate and the pressure ring to limit the position. When the main body is subjected to lateral pressure, the movement trend of the main body to one side is overcome, so that the valve seat can withstand greater pressure and prevent the valve seat from being squeezed out of the butterfly plate and the pressure ring in the open state with pressure.

[0020] 2. The valve seat provided by the utility model has a pair of clamping bosses extending from the inner side of the main body toward the outer side of the main body, and the extension distance of one clamping boss is greater than the extension distance of the other clamping boss. When installed on the valve, the clamping boss with a longer extension distance is set on the pressure-bearing surface of the valve seat to improve the stability of the valve seat clamping installation and prevent the valve seat from being squeezed out from between the butterfly plate and the pressure ring when the valve seat is in the pressurized open state.

[0021] 3. The eccentric butterfly valve provided by the utility model, by installing the valve seat provided in this application, when in the pressurized open state, when the main body is subjected to lateral pressure, the limiting protrusion arranged on the valve seat can overcome the movement tendency of the main body to one side, so that the valve seat can withstand greater pressure and avoid the valve seat being squeezed out of the butterfly plate and the pressure ring in the pressurized open state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of the valve seat provided in the embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the eccentric butterfly valve provided in the embodiment of the utility model.

[0025] Explanation of the accompanying drawings: 1. Main body; 2. Clamping boss; 3. Limiting protrusion; 4. Butterfly plate; 5. Pressing ring; 6. Valve body; 7. Limiting sleeve; 8. Adjusting clearance. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] Figure 1 The valve seat provided in this embodiment is shown, comprising a main body 1, a limiting protrusion 3 and a pair of clamping bosses 2. The valve seat is annular, so the main body 1, the limiting protrusion 3 and the clamping boss 2 are also annular. Figure 1 Shown is a schematic cross-sectional view of the valve seat.

[0032] The main body 1 is annular, the limiting protrusion 3 is connected to the inner side of the main body 1, the limiting protrusion 3 extends toward the inner side of the main body 1, and the thickness of the limiting protrusion 3 is not greater than the thickness of the main body 1. A pair of clamping bosses 2 are respectively connected to the two sides of the main body 1, and the clamping bosses 2 are arranged close to the inner side of the main body 1.

[0033] In this embodiment, a pair of clamping bosses 2 both extend from the inner side of the main body 1 toward the outer side of the main body 1, and the extension distance of one clamping boss 2 is greater than the extension distance of the other clamping boss 2. The clamping boss 2 with a longer extension distance is suitable for clamping with the butterfly plate 4, and the clamping boss 2 with a shorter extension distance is suitable for clamping with the pressure ring 5.

[0034] When the valve seat is installed in cooperation with the butterfly plate 4 and the pressure ring 5, the main body 1 is clamped and installed between the butterfly plate 4 and the pressure ring 5 through a pair of clamping bosses 2, and the limiting protrusion 3 on the inner side of the main body 1 extends toward the center of the butterfly plate 4 and the pressure ring 5. Under the extrusion of the butterfly plate 4 and the pressure ring 5, the side of the main body 1 away from the limiting protrusion 3 bulges outward to seal with the valve port on the valve body 6. In the open state with pressure, the limiting protrusion 3 set on the valve seat can cooperate with the butterfly plate 4 and the pressure ring 5 to limit the position. When the main body 1 is subjected to lateral pressure, the movement trend of the main body 1 to one side is overcome, so that the valve seat can withstand greater pressure and prevent the valve seat from being squeezed out of the butterfly plate 4 and the pressure ring 5 in the open state with pressure.

[0035] As an alternative embodiment, the widths of the pair of engaging bosses 2 extending toward the outer side of the main body 1 are the same.

[0036] Example 2

[0037] Figure 2 The eccentric butterfly valve provided in this embodiment is shown, which has the valve seat described in Embodiment 1. It also includes a butterfly plate 4, a pressure ring 5, a valve body 6 and a limiting sleeve 7.

[0038] The butterfly plate 4 and the pressure ring 5 are fixedly connected and arranged in parallel, the valve seat is clamped and installed between the butterfly plate 4 and the pressure ring 5, and the main body 1 of the valve seat is extended to the outside of the pressure ring 5 and the butterfly plate 4 on the side away from the limiting boss. In order to adjust the pressure applied by the butterfly plate 4 and the pressure ring 5 to the valve seat, an adjustment gap 8 is reserved between the butterfly plate 4 and the pressure ring 5.

[0039] A valve port is provided on the valve body 6, and the integral assembly consisting of the butterfly plate 4, the pressure ring 5 and the valve seat is rotatably mounted on the valve port. A valve stem is fixedly mounted between the pressure ring 5 and the butterfly plate 4, and the valve stem drives the integral assembly consisting of the butterfly plate 4, the pressure ring 5 and the valve seat to rotate on the valve port to realize the opening and closing of the valve port. When the valve port is closed, the side of the valve seat away from the limiting boss, that is, the outer side of the valve seat, abuts against the inner side wall of the valve port for sealing.

[0040] In order to limit the rotation distance of the valve seat, a limiting sleeve 7 is installed on the valve port of the valve body 6, and a limiting notch is provided on the side of the butterfly plate 4 facing away from the pressure ring 5. The limiting notch is suitable for cooperating with the limiting sleeve 7 to limit the closed position of the valve seat and the valve port by limiting the position of the butterfly plate 4, thereby ensuring that the valve port can be completely sealed by the valve seat when it is closed to avoid misalignment.

[0041] A first groove is provided on the side of the butterfly plate 4 facing the pressure ring 5, and a second groove is provided on the side of the pressure ring 5 facing the butterfly plate 4. The width of the first groove is greater than the width of the second groove. A wider clamping boss 2 on the valve seat is installed in the first groove, and the other narrower clamping boss 2 is installed in the second groove.

[0042] By installing the valve seat provided in Example 1, in the pressurized open state, when the main body 1 is subjected to lateral pressure, the limiting protrusion 3 provided on the valve seat can overcome the movement tendency of the main body 1 to one side, so that the valve seat can withstand greater pressure and avoid the valve seat being squeezed out of the butterfly plate 4 and the pressure ring 5 in the pressurized open state.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. 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 the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A valve seat, characterized in that: include: The main body (1) is annular, the inner side of the main body (1) is connected to a limiting protrusion (3), the limiting protrusion (3) extends toward the inner side of the main body (1), and the thickness of the limiting protrusion (3) is not greater than the thickness of the main body (1); A pair of clamping bosses (2) are respectively connected to two surfaces of the main body (1), and the clamping bosses (2) are arranged close to the inner side of the main body (1).

2. The valve seat according to claim 1, characterized in that: A pair of the clamping bosses (2) both extend from the inner side edge of the main body (1) toward the outer side edge of the main body (1), and the extension distance of one of the clamping bosses (2) is greater than the extension distance of the other clamping boss (2).

3. The valve seat according to claim 2, characterized in that: The clamping boss (2) with a longer extension distance is suitable for clamping cooperation with the butterfly plate (4), and the clamping boss (2) with a shorter extension distance is suitable for clamping cooperation with the pressure ring (5).

4. An eccentric butterfly valve, characterized in that: A valve seat according to any one of claims 1 to 3.

5. The eccentric butterfly valve according to claim 4, characterized in that: It also includes a fixedly matched butterfly plate (4) and a pressure ring (5), wherein the butterfly plate (4) and the pressure ring (5) are arranged in parallel, the valve seat is clamped and installed between the butterfly plate (4) and the pressure ring (5), and the main body (1) of the valve seat is extended to the outside of the outer edge of the pressure ring (5) and the butterfly plate (4) on the side away from the limiting boss.

6. The eccentric butterfly valve according to claim 5, characterized in that: An adjustment gap (8) is reserved between the butterfly plate (4) and the pressure ring (5).

7. The eccentric butterfly valve according to claim 5 or 6, characterized in that: It also comprises a valve body (6) on which a valve port is arranged, the valve seat is mounted on the valve port, and the side of the valve seat facing away from the limiting boss is suitable for abutting and sealing with the inner side wall of the valve port.

8. The eccentric butterfly valve according to claim 7, characterized in that: A limiting sleeve (7) is installed on the valve port of the valve body (6), and the butterfly plate (4) is suitable for abutting against the limiting sleeve (7) for limiting position.

9. The eccentric butterfly valve according to claim 8, characterized in that: A limiting notch is provided on a surface of the butterfly plate (4) facing away from the pressure ring (5), and the limiting notch is suitable for cooperating and abutting with the limiting sleeve (7).

10. The eccentric butterfly valve according to claim 5 or 6, characterized in that: A first clamping groove is provided on the side of the butterfly plate (4) facing the pressure ring (5), and a second clamping groove is provided on the side of the pressure ring (5) facing the butterfly plate (4). A pair of clamping bosses (2) of the valve seat are respectively installed in the first clamping groove and the second clamping groove.

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