Expansion butterfly valve for high temperature environments

Abstract

The utility model provides an expansion butterfly valve for high temperature environments, wherein the valve seat is fixedly arranged on the inner ring at one end of the valve body, the valve seat includes a fixing ring and a sealing rubber ring, and the sealing rubber ring and the cross section are a U-shaped structure, one side wall of the U-shaped structure is fixedly connected to the inner ring at one end of the valve body through the fixing ring, and the other side wall of the U-shaped structure is fixedly connected to one end of the fixing ring, and an expansion space is arranged between the bottom of the U-shaped structure and the inner ring of the fixing ring, and an air inlet hole is radially arranged on the side wall of the fixing ring, and the air inlet hole is connected to the expansion space, and an external air injection device can inject compressed medium into the expansion space through the air inlet hole. The expansion butterfly valve for high temperature environments described in the utility model only has an expansion space for sealing arranged on the inner ring at one end of the valve body, which reduces the contact area between the sealing rubber ring and the valve plate and the deformation volume of the expansion space, reduces the influence of the high temperature environment on the sealing rubber ring, and improves the service life of the sealing component.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and in particular relates to an expansion butterfly valve used in a high-temperature environment. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing. The butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting off and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates in the valve body to achieve the purpose of opening, closing or regulating.

[0003] In high-temperature environment applications, in order to reduce the scratch between the sealing ring of the valve seat in the valve body and the valve plate, it is necessary to reduce the inner diameter of the sealing ring or the outer diameter of the valve plate to reduce the squeezing force of the valve plate on the sealing ring during opening and closing. At the same time, in order to improve the sealing performance, it is necessary to change the inner diameter of the sealing ring by injecting compressed medium, so that when sealing is required, the inner ring of the sealing ring is squeezed onto the valve plate, and when sealing is not required, the scratch of the valve plate on the sealing ring is reduced. The sealing ring is generally made of rubber. In high-temperature environment applications, high temperature will cause the rubber to soften. When the valve plate scratches the sealing ring, it will cause the sealing ring to deform, affecting the sealing performance. Summary of the invention

[0004] In view of this, the utility model aims to propose an expansion butterfly valve for use in high temperature environments to solve the problem that the sealing rubber ring of the expansion butterfly valve in the prior art is easily deformed by the valve plate when softened in a high temperature environment, thereby reducing the sealing performance.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The closure of the valve body is fixedly connected to the closure of the valve body by the closure of the valve core, and the closure of the valve core is connected to the closure of the valve body by the closure of the valve core.

[0007] Furthermore, a limiting portion is provided on the inner ring of the valve body, and one end of the limiting portion can abut against one end of the valve plate.

[0008] Furthermore, the valve plate is fixedly sleeved to the periphery of the valve shaft through a shaft sleeve, and the valve plate is located on one side of the valve shaft.

[0009] Furthermore, the valve shaft is eccentrically arranged relative to the valve plate and the valve body, and the valve plate and the valve body are coaxially arranged.

[0010] Furthermore, a first annular groove is provided at one end of the fixing ring close to the valve body, and a first annular clamping platform is provided on the inner wall of one side of the U-shaped structure of the sealing rubber ring. The first annular clamping platform is clamped into the first annular groove, and the end of the fixing ring close to the valve body can fix the inner wall to one end of the valve body.

[0011] Furthermore, a support ring platform is provided at the inner ring of one end of the fixing ring away from the valve body, and the support ring platform is used to support the U-shaped structure side wall of the sealing rubber ring, and an expansion space is formed between the inside of the U-shaped structure of the sealing rubber ring and one end of the support ring platform.

[0012] Furthermore, one end of the valve body is fixedly connected to one end of the pipeline, and an annular boss for sealing is arranged on an outer wall of a U-shaped structure of the sealing rubber ring away from the valve body, and the outer wall and the annular boss are located between the valve body and the pipeline.

[0013] Furthermore, an inner ring at one end of the valve body is provided with a mounting ring groove, a fixing ring is located in the mounting ring groove, and an outer ring of the fixing ring and a side wall of the mounting ring groove form a second annular groove, and a second annular clamping platform is provided on an inner wall of a side of the U-shaped structure of the sealing rubber ring away from the valve body, and the outer periphery of the second annular clamping platform is clamped into the second annular groove.

[0014] Compared with the prior art, the expansion butterfly valve for high temperature environment described in the utility model has the following beneficial effects:

[0015] (1) The expansion butterfly valve for high temperature environment described in the utility model only has an expansion space for sealing on the inner ring at one end of the valve body, thereby reducing the contact area between the sealing rubber ring and the valve plate and the deformation volume of the expansion space, reducing the influence of the high temperature environment on the sealing rubber ring, and increasing the service life of the sealing component.

[0016] (2) In the expansion butterfly valve for high temperature environment described in the utility model, the first annular clamping platform is matched to the inside of the first annular clamping groove to ensure that the sealing rubber ring is installed in place, and it is convenient for one end of the fixing ring and one end of the valve body to squeeze and fix the side wall of the U-shaped structure to prevent the sealing rubber ring from being pressed out of the installation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of an expansion butterfly valve for high temperature environments according to an embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of an expansion butterfly valve for high temperature environment according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the valve seat according to an embodiment of the utility model;

[0021] Figure 4 It is a cross-sectional schematic diagram of the valve seat described in the embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the sealing rubber ring according to an embodiment of the utility model;

[0023] Figure 6 It is a cross-sectional schematic diagram of the sealing rubber ring described in the embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1-valve body; 2-valve plate; 21-shaft sleeve; 3-valve shaft; 4-valve seat; 41-sealing rubber ring; 42-fixing ring; 43-air inlet hole; 44-expansion space; 45-first annular clamping platform; 46-supporting ring platform; 47-annular boss; 48-second annular clamping platform; 5-limiting part. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In the description of the present utility model, 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 a limitation on the present utility model. 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 technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[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 an indirect connection 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 by specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figure 1-Figure 6As shown, an expansion butterfly valve for high temperature environment comprises a valve body 1, a valve plate 2, a valve shaft 3 and a valve seat 4, the valve shaft 3 is rotatably sleeved on the valve body 1, a valve plate 2 is arranged on the inner ring of the valve body 1, the valve plate 2 is fixedly sleeved on the periphery of the valve shaft 3, and the periphery of the valve plate 2 can be sealed and connected to the inner ring of the valve seat 4, the valve seat 4 is fixedly arranged on the inner ring at one end of the valve body 1, the valve seat 4 comprises a fixing ring 42 and a sealing rubber ring 41, and the sealing rubber ring 41 and the cross section are a U-shaped structure, one side wall of the U-shaped structure is fixedly connected to the inner ring at one end of the valve body 1 through the fixing ring 42, the other side wall of the U-shaped structure is fixedly connected to one end of the fixing ring 42, and the bottom of the U-shaped structure is fixed to the fixing ring 42. An expansion space 44 is provided between the inner rings of the fixed ring 42, and an air inlet hole 43 is radially provided on the side wall of the fixed ring 42. The air inlet hole 43 is connected to the expansion space 44, and an external air injection device can inject compressed air into the expansion space 44 through the air inlet hole 43. The compressed air is used to reduce the diameter of the inner ring of the sealing rubber ring 41. The reduced diameter inner ring of the sealing rubber ring 41 can be sealed and connected to the periphery of the valve plate 2. The expansion space 44 for sealing is only provided on the inner ring at one end of the valve body 1, so as to reduce the contact area between the sealing rubber ring 41 and the valve plate 2 and the deformation volume of the expansion space 44, reduce the influence of the high temperature environment on the sealing rubber ring 41, and improve the service life of the sealing component.

[0031] A limit portion 5 is provided on the inner ring of the valve body 1, one end of which can abut against one end of the valve plate 2. The limit portion 5 is used to limit the closing origin of the valve plate 2 to the valve body 1 to prevent excessive rotation of the valve shaft 3, which would result in poor closing of the valve plate 2 to the valve body 1.

[0032] The present embodiment is an eccentric butterfly valve, and the specific implementation method is that the valve plate 2 is fixedly sleeved to the periphery of the valve shaft 3 through the shaft sleeve 21, and the valve plate 2 is located on one side of the valve shaft 3, and the valve shaft 3 is eccentrically arranged relative to the valve plate 2 and the valve body 1, and the valve plate 2 and the valve body 1 are arranged coaxially, so as to ensure that the connection part between the valve plate 2 and the valve shaft 3 will not repeatedly rub the inner ring of the sealing rubber ring 41, and when the valve plate 2 is rotated, the valve plate 2 can quickly achieve contact with the inner ring of the sealing rubber ring 41, thereby reducing the pressure of the outer edge of the valve plate 2 scratching the inner ring of the sealing rubber ring 41, and improving the service life of the sealing rubber ring 41.

[0033] A first annular groove is provided at one end of the fixing ring 42 close to the valve body 1, and a first annular clamping platform 45 is provided on the inner wall of one side of the U-shaped structure of the sealing rubber ring 41. The first annular clamping platform 45 is clamped into the first annular groove, and the end of the fixing ring 42 close to the valve body 1 can fix the inner wall to one end of the valve body 1. The first annular clamping platform 45 cooperates with the inside of the first annular groove to ensure that the sealing rubber ring 41 is installed in place, and facilitates one end of the fixing ring 42 and one end of the valve body 1 to squeeze and fix the side wall of the U-shaped structure to prevent the sealing rubber ring 41 from being pressed out of the installation position.

[0034] A support ring platform 46 is provided at the inner ring of one end of the fixing ring 42 away from the valve body 1. The support ring platform 46 is used to support the side wall of the U-shaped structure of the sealing rubber ring 41, and an expansion space 44 is formed between the inside of the U-shaped structure of the sealing rubber ring 41 and one end of the support ring platform 46. The support ring platform 46 is used to support the side wall of the U-shaped structure to prevent the U-shaped structure from being deformed by being scratched by the valve plate 2, thereby improving the sealing function and reducing the loss of parts.

[0035] One end of the valve body 1 is fixedly connected to one end of the pipeline, and an annular boss 47 for sealing is provided on the outer wall of the U-shaped structure of the sealing rubber ring 41 away from the valve body 1, and the outer wall and the annular boss 47 are located between the valve body 1 and the pipeline.

[0036] An installation ring groove is provided on the inner ring of one end of the valve body 1, and the fixing ring 42 is located in the installation ring groove, and the outer ring of the fixing ring 42 and the side wall of the installation ring groove form a second annular groove, and a second annular clamping platform 48 is provided on the inner wall of the U-shaped structure of the sealing rubber ring 41 away from the valve body 1, and the outer periphery of the second annular clamping platform 48 is clamped into the second annular groove. The second annular clamping platform 48 has a similar function to the first annular clamping platform 45, which prevents the sealing rubber ring 41 from being pressed out of the installation position after the pipeline clamps the valve body 1.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An expansion butterfly valve for use in a high temperature environment, comprising a valve body (1), a valve plate (2), a valve shaft (3) and a valve seat (4), wherein the valve shaft (3) is rotatably sleeved on the valve body (1), a valve plate (2) is arranged on the inner ring of the valve body (1), the valve plate (2) is fixedly sleeved on the outer periphery of the valve shaft (3), and the outer periphery of the valve plate (2) can be sealed and connected to the inner ring of the valve seat (4), characterized in that: The valve seat (4) is fixedly arranged on the inner ring of one end of the valve body (1), and the valve seat (4) includes a fixing ring (42) and a sealing rubber ring (41), and the sealing rubber ring (41) and the cross section are U-shaped structures, one side wall of the U-shaped structure is fixedly connected to the inner ring of one end of the valve body (1) through the fixing ring (42), and the other side wall of the U-shaped structure is fixedly connected to one end of the fixing ring (42), and an expansion space (44) is provided between the bottom of the U-shaped structure and the inner ring of the fixing ring (42), and the side wall of the fixing ring (42) is radially provided with an air inlet hole (43), and the air inlet hole (43) is connected to the expansion space (44), and an external air injection device can inject compressed medium into the expansion space (44) through the air inlet hole (43), and the compressed medium is used to reduce the diameter of the inner ring of the sealing rubber ring (41), and the reduced diameter inner ring of the sealing rubber ring (41) can be sealed and connected to the periphery of the valve plate (2).

2. The expansion butterfly valve for high temperature environment according to claim 1, characterized in that: A limiting portion (5) is provided on the inner ring of the valve body (1), and one end of the limiting portion (5) can abut against one end of the valve plate (2).

3. The expansion butterfly valve for high temperature environment according to claim 1, characterized in that: The valve plate (2) is fixedly sleeved to the periphery of the valve shaft (3) via a shaft sleeve (21), and the valve plate (2) is located on one side of the valve shaft (3).

4. The expansion butterfly valve for high temperature environment according to claim 1, characterized in that: The valve shaft (3) is eccentrically arranged relative to the valve plate (2) and the valve body (1), and the valve plate (2) and the valve body (1) are coaxially arranged.

5. The expansion butterfly valve for high temperature environment according to claim 1, characterized in that: A first annular groove is provided at one end of the fixing ring (42) close to the valve body (1), a first annular clamping platform (45) is provided on the inner wall of one side of the U-shaped structure of the sealing rubber ring (41), the first annular clamping platform (45) is clamped into the first annular groove, and the end of the fixing ring (42) close to the valve body (1) can fix the inner wall to one end of the valve body (1).

6. The expansion butterfly valve for high temperature environment according to claim 5, characterized in that: A support ring platform (46) is provided on the inner ring of one end of the fixing ring (42) away from the valve body (1), and the support ring platform (46) is used to support the side wall of the U-shaped structure of the sealing rubber ring (41), and an expansion space (44) is formed between the inside of the U-shaped structure of the sealing rubber ring (41) and one end of the support ring platform (46).

7. The expansion butterfly valve for high temperature environment according to claim 5, characterized in that: One end of the valve body (1) is fixedly connected to one end of the pipeline, and an annular boss (47) for sealing is provided on the outer wall of the U-shaped structure of the sealing rubber ring (41) away from the valve body (1), and the outer wall and the annular boss (47) are located between the valve body (1) and the pipeline.

8. The expansion butterfly valve for high temperature environment according to claim 5, characterized in that: An inner ring at one end of the valve body (1) is provided with a mounting ring groove, a fixed ring (42) is located in the mounting ring groove, and an outer ring of the fixed ring (42) and a side wall of the mounting ring groove form a second annular clamping groove, and a second annular clamping platform (48) is provided on an inner wall of a side of the U-shaped structure of the sealing rubber ring (41) away from the valve body (1), and the outer periphery of the second annular clamping platform (48) is clamped into the second annular clamping groove.

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