High sealing butterfly valve

Abstract

This utility model discloses a high-sealing butterfly valve, including a valve body, a butterfly plate, and a split-type sealing mechanism. The butterfly plate is rotatably assembled within the valve body, and the split-type sealing mechanism is fixedly assembled within the valve body. The split-type sealing mechanism is used to seal and limit the movement of the butterfly plate. The split-type sealing mechanism includes a pair of limiting baffles and a pair of sealing gaskets. The pair of limiting baffles are respectively arranged on both sides of the butterfly plate, and the outer surfaces of both limiting baffles are fixedly connected to the inner wall of the valve body. The pair of sealing gaskets are respectively fixedly connected to the side of the pair of limiting baffles closest to the butterfly plate. Both sealing gaskets are hollow, and the cross-sections of both the pair of limiting baffles and the sealing gaskets are L-shaped. The high-sealing butterfly valve disclosed in this utility model improves the sealing effect of the butterfly valve by setting a split-type sealing mechanism. At the same time, the sealing ring can be easily disassembled and replaced according to the actual situation, improving the convenience of butterfly valve inspection and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, and specifically relates to a high-sealing butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a regulating valve used to control the flow and transport of media in low-pressure pipelines. It mainly consists of a valve body, a valve stem, a butterfly plate, and a sealing ring. The valve body is cylindrical with a built-in butterfly plate. The flow and transport status of the valve body is regulated by controlling the rotation of the butterfly plate through the valve stem.

[0003] Most common butterfly valves control the valve's conduction state through the cooperation between the butterfly plate and the valve body. However, due to unavoidable manufacturing errors during actual production, the cooperation between the valve body and the butterfly plate is usually in a clearance fit, resulting in poor sealing performance. Existing technologies also improve the sealing performance by setting a circular sealing ring inside the valve body. However, when this method is used to seal the butterfly plate and valve body, the butterfly valve is susceptible to unsatisfactory sealing performance due to factors such as aging and wear of the circular sealing ring, resulting in poor sealing stability.

[0004] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a high-sealing butterfly valve.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a high-sealing butterfly valve that can improve the sealing performance of the butterfly valve.

[0007] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0008] A high-sealing butterfly valve includes a valve body, a butterfly plate, and a split-type sealing mechanism. The butterfly plate is rotatably mounted in the valve body, and the split-type sealing mechanism is fixedly mounted in the valve body. The split-type sealing mechanism is used to seal and limit the movement of the butterfly plate. The split-type sealing mechanism includes a pair of limiting baffles and a pair of sealing gaskets. The pair of limiting baffles are respectively arranged on both sides of the butterfly plate, and the outer surfaces of the pair of limiting baffles are fixedly connected to the inner wall of the valve body. The pair of sealing gaskets are respectively fixedly connected to the side of the pair of limiting baffles close to the butterfly plate. The pair of sealing gaskets are both hollow, and the cross-sections of the pair of limiting baffles and sealing gaskets are both L-shaped.

[0009] In one or more embodiments of this utility model, both ends of the valve body are integrally formed with connecting flanges, and the connecting flanges have multiple evenly distributed mounting bolt holes. The connecting flanges are connected to the media conveying pipeline through the mounting bolt holes, thereby assembling and fixing the connecting flanges.

[0010] In one or more embodiments of this utility model, a limiting cylinder is integrally formed on the upper part of the valve body, and the limiting cylinder serves to limit the assembly of the valve stem. The valve stem is rotatably assembled inside the limiting cylinder, and one end of the valve stem located inside the valve body is fixedly connected to the butterfly plate. The rotation of the butterfly plate can be controlled by controlling the rotation of the valve stem.

[0011] In one or more embodiments of this utility model, the inner wall of the limiting baffle has a first inner side and a second inner side, and the first inner side and the second inner side are arranged perpendicularly.

[0012] In one or more embodiments of this utility model, the outer surface of the sealing gasket has a first outer side and a second outer side, and the first outer side and the second outer side are arranged perpendicularly.

[0013] In one or more embodiments of this utility model, the length of the first inner side is greater than that of the first outer side, the length of the second inner side is greater than that of the second outer side, the first inner side is in contact with the first outer side, and the second inner side is in contact with the second outer side.

[0014] In one or more embodiments of this utility model, a plurality of evenly distributed positioning blocks are integrally formed on the first outer surface, and a plurality of evenly distributed positioning holes are provided on the first inner surface. The sealing gasket and the limiting baffle are assembled and limited by the cooperation of the positioning blocks and the positioning holes.

[0015] In one or more embodiments of this utility model, a plurality of positioning holes are correspondingly provided with positioning blocks, and the positioning blocks and positioning holes are interference-fitted. By setting the positioning blocks and positioning holes with an interference fit, the assembly stability of the positioning blocks and positioning holes is ensured.

[0016] Compared with the prior art, the high-sealing butterfly valve disclosed in this utility model improves the sealing effect of the butterfly valve by setting a split sealing mechanism. At the same time, the sealing ring can be easily disassembled and replaced according to the actual situation, which improves the convenience of butterfly valve inspection and maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of a high-sealing butterfly valve in one embodiment of the present invention;

[0019] Figure 2 This is a partial structural schematic diagram of a high-sealing butterfly valve in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the split sealing mechanism of the high-sealing butterfly valve in one embodiment of the present invention;

[0021] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle;

[0022] Figure 5 This is a top sectional view of a high-sealing butterfly valve in one embodiment of the present invention;

[0023] Figure 6 for Figure 5 Schematic diagram of the structure at point B.

[0024] Explanation of key figure labels:

[0025] 1-Valve body, 2-Butterfly plate, 3-Split sealing mechanism, 301-Limit baffle, 302-Sealing gasket, 303-Positioning block, 4-Connecting flange, 5-Limiting cylinder, 6-Valve stem. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0027] like Figures 1 to 6 As shown, a high-sealing butterfly valve in one embodiment of the present invention includes a valve body 1, a butterfly plate 2, and a split sealing mechanism 3. The conduction and conveying state of the valve body 1 can be controlled by rotating the butterfly plate 2, and the sealing performance of the butterfly plate 2 can be ensured by the cooperation between the split sealing mechanism 3 and the butterfly plate 2.

[0028] like Figure 1 As shown, both ends of the valve body 1 are integrally formed with connecting flanges 4, and the connecting flanges 4 have multiple evenly distributed mounting bolt holes. The connecting flanges 4 are connected to the medium conveying pipeline through the mounting bolt holes, thereby assembling and fixing the connecting flanges 4.

[0029] like Figures 1 to 2 As shown, the butterfly plate 2 is rotatably assembled inside the valve body 1. An integrally formed limiting cylinder 5 is formed on the upper part of the valve body 1, which limits the assembly of the valve stem 6. The valve stem 6 is rotatably assembled inside the limiting cylinder 5. One end of the valve stem 6 located inside the valve body 1 is fixedly connected to the butterfly plate 2. By controlling the rotation of the valve stem 6, the butterfly plate 2 can be rotated.

[0030] like Figures 3 to 6 As shown, the split-type sealing mechanism 3 is fixedly assembled inside the valve body 1. The split-type sealing mechanism 3 is used to seal and limit the movement of the butterfly plate 2. The split-type sealing mechanism 3 includes a pair of limiting baffles 301 and a pair of sealing gaskets 302. The pair of limiting baffles 301 are respectively arranged on both sides of the butterfly plate 2, and the outer surfaces of both limiting baffles 301 are fixedly connected to the inner wall of the valve body 1. The pair of sealing gaskets 302 are respectively fixedly connected to the side of the pair of limiting baffles 301 closest to the butterfly plate 2. Both sealing gaskets 302 are hollow, and the cross-sections of both the limiting baffles 301 and the sealing gaskets 302 are L-shaped. The limiting baffles 301 serve to limit the movement of the sealing gaskets 302. Simultaneously, the mutual cooperation between the butterfly plate 2 and the sealing gaskets 302 ensures the sealing performance of the butterfly plate 2.

[0031] Specifically, the inner wall of the limiting baffle 301 has a first inner side and a second inner side, which are arranged perpendicularly. The outer surface of the sealing gasket 302 has a first outer side and a second outer side, which are arranged perpendicularly. The length of the first inner side is greater than that of the first outer side, and the length of the second inner side is greater than that of the second outer side. The first inner side and the first outer side are in contact with each other, and the second inner side and the second outer side are in contact with each other.

[0032] like Figures 3 to 4 As shown, multiple evenly distributed positioning blocks 303 are integrally formed on the first outer surface, and multiple evenly distributed positioning holes are formed on the first inner surface. The positioning blocks 303 cooperate with the positioning holes to limit the assembly of the sealing gasket 302 and the limiting baffle 301. The multiple positioning holes correspond to the positioning blocks 303, and the positioning blocks 303 and the positioning holes are interference-fitted. This interference fit ensures the assembly stability of the positioning blocks 303 and the positioning holes.

[0033] In practical use, the valve body 1 can be assembled into the control pipeline by connecting and fixing the connecting flange 4. The butterfly plate 2 can be rotated by rotating the control valve stem 6 clockwise, thus putting the valve body 1 in the conducting state. When it is necessary to close the valve body 1, the butterfly plate 2 can be rotated counterclockwise by rotating the valve stem 6. The butterfly plate 2 and the sealing gasket 302 are pressed together, providing a seal and protection for the butterfly plate 2. Furthermore, the sealing gasket 302 can be easily installed and removed by engaging the positioning block 303 with the positioning hole, allowing for easy replacement as needed.

[0034] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-sealing butterfly valve, comprising a valve body, a butterfly plate, and a split-type sealing mechanism, characterized in that, The butterfly plate is rotatably assembled in the valve body, and the split sealing mechanism is fixedly assembled in the valve body. The split sealing mechanism is used to seal and limit the butterfly plate. The split sealing mechanism includes a pair of limiting baffles and a pair of sealing gaskets. The pair of limiting baffles are respectively arranged on both sides of the butterfly plate, and the outer surfaces of the pair of limiting baffles are fixedly connected to the inner wall of the valve body. The pair of sealing gaskets are respectively fixedly connected to the side of the pair of limiting baffles close to the butterfly plate. The pair of sealing gaskets are hollow, and the cross-sections of the pair of limiting baffles and sealing gaskets are L-shaped.

2. The high-sealing butterfly valve according to claim 1, characterized in that, Both ends of the valve body are integrally formed with connecting flanges, and the connecting flanges have multiple evenly distributed mounting bolt holes.

3. The high-sealing butterfly valve according to claim 1, characterized in that, An integrally formed limiting cylinder is formed on the upper part of the valve body, and a valve stem is rotatably assembled inside the limiting cylinder. One end of the valve stem located inside the valve body is fixedly connected to the butterfly plate.

4. The high-sealing butterfly valve according to claim 1, characterized in that, The inner wall of the limiting baffle has a first inner side and a second inner side, which are arranged perpendicularly to each other.

5. The high-sealing butterfly valve according to claim 4, characterized in that, The outer surface of the sealing gasket has a first outer side and a second outer side, which are arranged perpendicularly to each other.

6. The high-sealing butterfly valve according to claim 5, characterized in that, The length of the first inner side is greater than that of the first outer side, the length of the second inner side is greater than that of the second outer side, the first inner side is in contact with the first outer side, and the second inner side is in contact with the second outer side.

7. The high-sealing butterfly valve according to claim 6, characterized in that, The first outer surface has multiple evenly distributed positioning blocks integrally formed, and the first inner surface has multiple evenly distributed positioning holes.

8. The high-sealing butterfly valve according to claim 7, characterized in that, The multiple positioning holes are correspondingly provided with positioning blocks, and the positioning blocks and positioning holes are interference-fitted.

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