High-sealing butterfly valve

Abstract

The utility model discloses a high sealing butterfly valve which comprises a valve body and further comprises a sealing mechanism, the sealing mechanism is arranged in the valve body and comprises a sealing ring, an annular convex ring, a valve plate, an annular groove and a rubber sleeve, the sealing ring is installed on the inner periphery of the valve body, the annular convex ring is integrally formed on the inner wall of the sealing ring, and the rubber sleeve is arranged in the valve plate. When the valve plate is in a completely closed state, the annular convex ring and the annular groove are just aligned in position and the annular convex ring is inserted into the annular groove, compared with an existing butterfly valve sealing assembly, through cooperation of the annular convex ring and the annular groove, the sealing area of the connecting position is increased, meanwhile, the sealing effect of the connecting position is improved through elasticity of the annular convex ring, and the leakage phenomenon is reduced; the sealing reliability of the butterfly valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a high-sealing butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure that can be used for on-off control of low-pressure pipeline media. A butterfly valve is a valve with a disc as the closing member, which rotates around the valve axis to open and close. It 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 a cutting and throttling role in pipelines. Due to its simple structure and low cost, it is widely used.

[0003] The existing butterfly valve has the following disadvantages when in use: the sealing of the butterfly valve in the closed state is generally achieved by the cooperation between the sealing ring located on the inner periphery of the valve body and the sealing ring on the outer periphery of the valve plate. The existing butterfly valve sealing assembly is generally an ordinary annular structure with a small contact area and an overly smooth contact method, which is easy to wear. After long-term use, leakage problems caused by aging of the sealing assembly are prone to occur. For this reason, we propose a high-sealing butterfly valve. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-sealing butterfly valve, which further improves the sealing reliability of the connection when the valve plate is closed by providing a sealing mechanism inside the valve body, thereby effectively solving the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A high-sealing butterfly valve includes a valve body and a sealing mechanism. The sealing mechanism is arranged inside the valve body, and the sealing mechanism includes a sealing ring, an annular convex ring, a valve plate, an annular groove and a rubber sleeve. A sealing ring is installed on the inner periphery of the valve body and an annular convex ring is integrally formed on the inner wall of the sealing ring. An annular groove corresponding to the position of the annular convex ring is opened on the outer periphery of the valve plate, and the outer periphery of the valve plate is covered with a rubber sleeve.

[0007] Furthermore, the outer peripheral surface of the valve plate is provided with an arc angle for facilitating the rotation of the valve plate; the arc angle structure makes the position of the valve plate close to the annular convex ring an arc structure, which makes it more convenient to rotate the valve plate during the opening and closing process of the valve plate.

[0008] Furthermore, an actuator is installed on the top of the valve body and the power output end of the actuator is connected to the power input end of the valve plate; when opening and closing the valve, the actuator is controlled, and its power output end drives the movement of the valve plate through the valve stem.

[0009] Furthermore, connecting flanges are integrally formed on both sides of the valve body surface for easy docking with the pipeline; the valve body and the docking pipeline are conveniently connected through the connecting flange structure.

[0010] Compared with the prior art, the present invention has the following beneficial effects: a sealing ring is provided on the inner periphery of the valve body and an annular convex ring is provided on the inner ring position of the sealing ring, the outer periphery of the valve plate is covered with a rubber sleeve, the annular convex ring and the sealing ring are both rubber structures with good elasticity and sealing. When the valve plate is changed from an open state to a closed state, the annular convex ring structure is squeezed at the outer periphery of the valve plate. When the valve plate is fully closed, the annular convex ring is aligned with the annular groove and the annular convex ring is inserted into the inside of the annular groove. Compared with the existing butterfly valve sealing assembly, the sealing area of ​​the connection is increased by cooperating with the annular convex ring and the annular groove. At the same time, the elasticity of the annular convex ring is used to improve the sealing effect of the connection, reduce leakage, and improve the sealing reliability of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of a high-sealing butterfly valve of the utility model.

[0012] Figure 2 The utility model is a schematic diagram of the structure of the connection between the valve body and the valve plate of a high-sealing butterfly valve.

[0013] In the figure: 1. Valve body; 2. Sealing mechanism; 201. Sealing ring; 202. Annular convex ring; 203. Valve plate; 204. Annular groove; 205. Rubber sleeve; 206. Arc angle; 3. Actuator; 4. Connecting flange. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0015] like Figure 1-2 As shown, a high-sealing butterfly valve includes a valve body 1 and a sealing mechanism 2. The sealing mechanism 2 is arranged inside the valve body 1, and the sealing mechanism 2 includes a sealing ring 201, an annular convex ring 202, a valve plate 203, an annular groove 204 and a rubber sleeve 205. The sealing ring 201 is installed on the inner periphery of the valve body 1, and the inner wall of the sealing ring 201 is integrally formed with an annular convex ring 202. The outer periphery of the valve plate 203 is provided with an annular groove 204 corresponding to the position of the annular convex ring 202, and the outer periphery of the valve plate 203 is covered with a rubber sleeve 205.

[0016] Among them, the outer surface of the valve plate 203 is provided with an arc angle 206 for facilitating the rotation of the valve plate 203, the actuator 3 is installed on the top of the valve body 1 and the power output end of the actuator 3 is connected to the power input end of the valve plate 203, and both sides of the surface of the valve body 1 are integrally formed with a connecting flange 4 for convenient docking with the pipeline; the arc angle 206 structure makes the valve plate 203 near the annular convex ring 202 an arc structure, and the valve plate 203 can be rotated more conveniently during the opening and closing process of the valve plate 203. When opening and closing the valve, the actuator 3 is controlled, and its power output end drives the movement of the valve plate 203 through the valve stem, and the valve body 1 is conveniently connected to the docking pipeline through the connecting flange 4 structure.

[0017] It should be noted that the present invention is a high-sealing butterfly valve. When in use, a sealing ring 201 is provided on the inner periphery of the valve body 1 and an annular convex ring 202 is provided on the inner ring position of the sealing ring 201. The outer periphery of the valve plate 203 is covered with a rubber sleeve 205. The annular convex ring 202 and the sealing ring 201 are both rubber structures with good elasticity and sealing. When the valve plate 203 is changed from an open state to a closed state, the annular convex ring 202 structure is squeezed at the outer periphery of the valve plate 203. When the valve plate 203 is fully closed, the annular convex ring 202 is exactly aligned with the annular groove 204 and the annular convex ring 202 is inserted into the inside of the annular groove 204. Compared with the existing butterfly valve sealing assembly, the annular convex ring 202 and the annular groove 204 cooperate to increase the sealing area of ​​the connection. At the same time, the elasticity of the annular convex ring 202 is used to improve the sealing effect of the connection, reduce leakage, and improve the sealing reliability of the butterfly valve.

[0018] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A high sealing butterfly valve, comprising a valve body (1), characterized in that: The valve body (1) further comprises a sealing mechanism (2), wherein the sealing mechanism (2) is arranged inside the valve body (1), and the sealing mechanism (2) comprises a sealing ring (201), an annular convex ring (202), a valve plate (203), an annular groove (204) and a rubber sleeve (205); the sealing ring (201) is installed on the inner periphery of the valve body (1), and the inner wall of the sealing ring (201) is integrally formed with an annular convex ring (202); the outer periphery of the valve plate (203) is provided with an annular groove (204) corresponding to the position of the annular convex ring (202), and the outer periphery of the valve plate (203) is covered with a rubber sleeve (205).

2. A high sealing butterfly valve according to claim 1, characterized in that: The outer peripheral surface of the valve plate (203) is provided with an arc-shaped corner (206) for facilitating the rotation of the valve plate (203).

3. A high sealing butterfly valve according to claim 1, characterized in that: An actuator (3) is installed on the top of the valve body (1), and the power output end of the actuator (3) is connected to the power input end of the valve plate (203).

4. A high sealing butterfly valve according to claim 1, characterized in that: Both sides of the surface of the valve body (1) are integrally formed with connection flanges (4) for easy connection with a pipeline.

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