Automatic compensation structure of butterfly valve

Abstract

The utility model discloses a butterfly valve automatic compensation structure belongs to butterfly valve technical field, including valve body, valve seat, butterfly plate and sealing compensation subassembly, the valve seat fixed mounting is in the valve body, the valve rod is rotatably installed in the valve body, the butterfly plate fixed mounting is on the valve rod, the edge of butterfly plate near valve seat one side is equipped with annular recess, sealing compensation subassembly includes the sealing ring embedding setting in annular recess, the contact surface of sealing ring and valve seat all is the taper surface, and the spring is abutted between sealing ring and annular recess inner wall, the annular recess is fixedly installed with the annular baffle in the side away from spring, through the setting of sealing compensation subassembly, along with the abrasion of sealing ring, the spring will push sealing ring and produce displacement, make sealing ring always keep and the close contact of valve seat to automatic compensation the abrasion of sealing ring, avoid the clearance between sealing ring and valve seat, guarantee butterfly valve seal tight.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, and specifically relates to an automatic compensation structure for butterfly valves. Background Technology

[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 is characterized by its closing element (valve disc or butterfly plate) being a disc that rotates around a valve shaft to open and close. Butterfly valves can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. They primarily function as shut-off and throttling devices in pipelines. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation.

[0003] Currently, butterfly valves on the market are generally composed of a valve body, valve seat, butterfly plate, and sealing ring. The sealing ring is located between the butterfly plate and the valve seat and plays a sealing role. With the frequent opening and closing of the butterfly valve, the sealing ring between the butterfly plate and the valve seat will gradually wear due to friction, resulting in a gap between the sealing ring and the valve seat, which can easily lead to the butterfly valve not sealing properly and leaking water. Utility Model Content

[0004] The purpose of this invention is to provide an automatic compensation structure for a butterfly valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic compensation structure for a butterfly valve, comprising a valve body, a valve seat, a butterfly plate, and a sealing compensation component. The valve seat is fixedly installed in the valve body, and a valve stem is rotatably installed in the valve body. The butterfly plate is fixedly installed on the valve stem, and an annular groove is formed on the edge of the butterfly plate near the valve seat. The sealing compensation component includes a sealing ring embedded in the annular groove. The contact surfaces of the sealing ring and the valve seat are both conical surfaces. A spring abuts against the inner wall of the annular groove between the sealing ring and the annular groove. An annular baffle is fixedly installed on the side of the annular groove away from the spring.

[0006] In a preferred embodiment, a support column is fixedly connected inside the annular groove, and both the sealing ring and the spring are movably sleeved on the support column.

[0007] In a preferred embodiment, a connecting bolt is inserted into one side of the annular baffle, and one end of the connecting bolt extends into the support column and is threadedly connected to the support column.

[0008] In a preferred embodiment, a positioning block is fixedly connected to the side of the annular baffle near the butterfly plate, and a positioning groove adapted to the positioning block is provided on one side of the butterfly plate.

[0009] In a preferred embodiment, a first annular groove is provided on one side of the sealing ring, and a first convex ring is provided on the butterfly plate near the edge of the annular groove, the first convex ring being inserted into the first annular groove.

[0010] In a preferred embodiment, a second annular groove is provided on the other side of the sealing ring, and a second convex ring is provided on the annular baffle near the edge of the annular groove, the second convex ring being inserted into the second annular groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The automatic compensation structure of this butterfly valve, through the setting of the sealing compensation component, when the butterfly plate is closed, the spring will apply elastic force to the sealing ring, so that the sealing ring is in close contact with the valve seat. As the sealing ring wears, the spring will push the sealing ring to move, so that the sealing ring always maintains close contact with the valve seat, thereby automatically compensating for the wear of the sealing ring, avoiding the formation of gaps between the sealing ring and the valve seat, and ensuring the tight sealing of the butterfly valve. The automatic compensation structure of this butterfly valve, through the setting of annular baffle, support column and connecting bolts, allows the connecting bolts to be loosened and the annular baffle to be removed when the sealing ring needs to be replaced, so that the sealing ring in the annular groove can be taken out, which is convenient for the replacement of the sealing ring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view sectional structural diagram of the present invention; Figure 3 For the present utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0013] In the figure: 1. Valve body; 11. Valve stem; 2. Valve seat; 3. Butterfly plate; 31. Annular groove; 4. Sealing compensation assembly; 41. Sealing ring; 42. Spring; 43. Annular baffle; 44. Support column; 45. Connecting bolt; 46. Positioning block; 47. First annular groove; 48. First convex ring; 49. Second annular groove; 410. Second convex ring. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments.

[0015] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0016] Please see Figure 1-3This utility model provides an automatic compensation structure for a butterfly valve, including a valve body 1, a valve seat 2, a butterfly plate 3, and a sealing compensation component 4. The valve seat 2 is fixedly installed inside the valve body 1, and a valve stem 11 is rotatably installed inside the valve body 1. The butterfly plate 3 is fixedly installed on the valve stem 11. An annular groove 31 is formed on the edge of the butterfly plate 3 near the valve seat 2. The sealing compensation component 4 includes a sealing ring 41 embedded in the annular groove 31. The contact surfaces of the sealing ring 41 and the valve seat 2 are both conical surfaces. A spring abuts against the inner wall of the annular groove 31 between the sealing ring 41 and the valve seat 2. 42. An annular baffle 43 is fixedly installed on the side of the annular groove 31 away from the spring 42. With the setting of the sealing compensation component 4, when the butterfly plate 3 is closed, the spring 42 will apply elastic force to the sealing ring 41, so that the sealing ring 41 is in close contact with the valve seat 2. As the sealing ring 41 wears, the spring 42 will push the sealing ring 41 to produce displacement, so that the sealing ring 41 always maintains close contact with the valve seat 2, thereby automatically compensating for the wear of the sealing ring 41, avoiding the gap between the sealing ring 41 and the valve seat 2, and ensuring the butterfly valve is tightly sealed.

[0017] Furthermore, a support column 44 is fixedly connected inside the annular groove 31. The sealing ring 41 and the spring 42 are both movably sleeved on the support column 44. The support column 44 can provide support for the sealing ring 41 and the spring 42.

[0018] Furthermore, a connecting bolt 45 is inserted into one side of the annular baffle 43. One end of the connecting bolt 45 extends into the support column 44 and is threadedly connected to the support column 44. By setting the connecting bolt 45, the annular baffle 43 and the support column 44 can be fixed, thereby fixing the annular baffle 43 and the butterfly plate 3.

[0019] Furthermore, a positioning block 46 is fixedly connected to the side of the annular baffle 43 near the butterfly plate 3. A positioning groove adapted to the positioning block 46 is provided on one side of the butterfly plate 3. The positioning block 46 can be used to position the annular baffle 43 when it is installed.

[0020] Furthermore, a first annular groove 47 is provided on one side of the sealing ring 41, and a first protruding ring 48 is provided on the butterfly plate 3 near the edge of the annular groove 31. The first protruding ring 48 is inserted into the first annular groove 47. Through the cooperation of the first annular groove 47 and the first protruding ring 48, gaps can be avoided between the sealing ring 41 and the butterfly plate 3.

[0021] Furthermore, a second annular groove 49 is provided on the other side of the sealing ring 41, and a second protruding ring 410 is provided on the annular baffle 43 near the edge of the annular groove 31. The second protruding ring 410 is inserted into the second annular groove 49. Through the cooperation between the second annular groove 49 and the second protruding ring 410, gaps can be avoided between the sealing ring 41 and the annular baffle 43.

[0022] The working principle and usage process of this utility model are as follows: First, during assembly, springs 42 are placed one by one on the corresponding support columns 44. Then, sealing rings 41 are placed in the annular grooves 31 and simultaneously placed on the support columns 44. Next, the positioning block 46 of the annular baffle 43 is aligned with the positioning groove on the surface of the butterfly plate 3 and inserted. Then, connecting bolts 45 are passed through the annular baffle 43 and inserted into the support columns 44 and tightened to complete the assembly of the sealing compensation component 4. When the butterfly plate 3 is closed, springs 42 apply elastic force to the sealing rings 41, making the sealing rings 41 and valve seats 2 in close contact. As the sealing rings 41 wear, springs 42 push the sealing rings 41 to move, so that the sealing rings 41 always maintain close contact with the valve seats 2, thereby automatically compensating for the wear of the sealing rings 41, avoiding gaps between the sealing rings 41 and valve seats 2, and ensuring the butterfly valve is tightly sealed.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic compensation structure for a butterfly valve, comprising a valve body (1), a valve seat (2), a butterfly plate (3), and a sealing compensation assembly (4), characterized in that: The valve seat (2) is fixedly installed inside the valve body (1). The valve stem (11) is rotatably installed inside the valve body (1). The butterfly plate (3) is fixedly installed on the valve stem (11). An annular groove (31) is provided on the edge of the butterfly plate (3) near the valve seat (2). The sealing compensation component (4) includes a sealing ring (41) embedded in the annular groove (31). The contact surfaces of the sealing ring (41) and the valve seat (2) are both conical surfaces. A spring (42) abuts against the inner wall of the annular groove (31). An annular baffle (43) is fixedly installed on the side of the annular groove (31) away from the spring (42).

2. The automatic compensation structure for a butterfly valve according to claim 1, characterized in that: The annular groove (31) is fixedly connected to a support column (44), and the sealing ring (41) and the spring (42) are both movably sleeved on the support column (44).

3. The automatic compensation structure for a butterfly valve according to claim 1, characterized in that: A connecting bolt (45) is inserted into one side of the annular baffle (43), and one end of the connecting bolt (45) extends into the support column (44) and is threadedly connected to the support column (44).

4. The automatic compensation structure for a butterfly valve according to claim 1, characterized in that: The annular baffle (43) is fixedly connected to a positioning block (46) on the side near the butterfly plate (3), and a positioning groove adapted to the positioning block (46) is provided on one side of the butterfly plate (3).

5. The automatic compensation structure for a butterfly valve according to claim 1, characterized in that: The sealing ring (41) has a first annular groove (47) on one side, and the butterfly plate (3) has a first protruding ring (48) near the edge of the annular groove (31), and the first protruding ring (48) is inserted into the first annular groove (47).

6. The automatic compensation structure for a butterfly valve according to claim 1, characterized in that: A second annular groove (49) is provided on the other side of the sealing ring (41), and a second convex ring (410) is provided on the annular baffle (43) near the edge of the annular groove (31), and the second convex ring (410) is inserted into the second annular groove (49).

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