Ball valve with high sealing performance

Abstract

The utility model discloses a ball valve with high sealing performance, which comprises a main valve body and side valve bodies positioned on the two sides of the main valve body, valve seats are arranged on the opposite side surfaces of the two side valve bodies, a ball core positioned in the main valve body is arranged between the two valve seats, a valve rod rotationally connected with the main valve body is mounted on the ball core, and the valve rod is connected with the main valve body through the valve seat. A first sealing ring groove is further formed in the side face, close to the main valve body, of the side valve body, a first sealing ring is arranged in the first sealing ring groove, second sealing ring grooves are formed in the two side faces, close to the side valve body, of the main valve body, and second sealing rings are arranged in the second sealing ring grooves. A first seal is formed through the teflon sealing bush between the valve seat and the main valve body, a second seal is formed through pressing the first sealing ring by the first extrusion ring part, and a third seal is formed through pressing the second sealing ring by the second extrusion ring part, so that the sealing performance between the main valve body and the side valve body of the ball valve is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve sealing, specifically to a ball valve with high sealing performance. Background Technology

[0002] A ball valve is a type of valve that is operated by a valve stem and rotates around the valve axis. It can also be used for fluid regulation and control. Among them, the hard-seal V-type ball valve has a strong shearing force between its V-shaped ball core and the metal valve seat with hard alloy overlay, making it particularly suitable for media containing fibers, small solid particles, etc. Multi-port ball valves can not only flexibly control the merging, splitting, and switching of the flow direction of media in pipelines, but also close any channel while connecting the other two channels.

[0003] Ball valves are prone to the following problems during use: After prolonged use, the sealing ring of the ball valve is prone to aging and deformation, which leads to a decrease in the sealing performance of the ball valve. This is especially true for ball valves with a single sealing ring, where reduced sealing performance makes leakage between the main valve body and the side valve body more likely. Therefore, this utility model proposes a ball valve with high sealing performance. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a ball valve with high sealing performance. The first seal is formed by the PTFE sealing bushing between the valve seat and the main valve body. The second seal is formed by the first extrusion ring pressing the first sealing ring. The third seal is formed by the second extrusion ring pressing the second sealing ring. This greatly improves the sealing performance between the main valve body and the side valve body of the ball valve and reduces the probability of water leakage between the main valve body and the side valve body after long-term use.

[0005] Technical solution

[0006] A high-sealing ball valve includes a main valve body and side valve bodies located on both sides of the main valve body. Valve seats are provided on opposite sides of the two side valve bodies, and a ball core located inside the main valve body is provided between the two valve seats. A valve stem rotatably connected to the main valve body is mounted on the ball core. A first sealing ring groove is also provided on the side of the side valve body near the main valve body, and a first sealing ring is provided in the first sealing ring groove. A second sealing ring groove is provided on the two sides of the main valve body near the side valve bodies, and a second sealing ring is provided in the second sealing ring groove.

[0007] Furthermore, the main valve body is provided with a first compression ring portion on both sides near the side valve body, which can be precisely engaged with the first sealing ring groove for compressing the first sealing ring.

[0008] Furthermore, the side valve body is provided with a second compression ring portion on the side surface near the main valve body, which can be precisely engaged with the second sealing ring groove for compressing the second sealing ring.

[0009] Furthermore, the annular side surfaces of the first extrusion ring portion and the second extrusion ring portion abut against each other.

[0010] Furthermore, a PTFE sealing bushing is fitted on the side of the valve seat near the ball core, and the outer annular surface of the PTFE sealing bushing abuts against the inner annular wall of the main valve body.

[0011] Furthermore, a stepped structure is provided on the outer ring surface of the PTFE sealing bushing, and the stepped structure abuts and matches the raised step on the inner side of the main valve body.

[0012] Furthermore, a threaded post extends between the two side valve bodies, and nuts are threaded at both ends of the threaded post to press and fix the side valve body and the main valve body together.

[0013] Furthermore, a third sealing ring is provided between the valve stem and the main valve body.

[0014] Beneficial effects

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] The ball valve achieves a first seal by using a PTFE sealing bushing between the valve seat and the main valve body. A second seal is formed by pressing the first sealing ring with the first compression ring. A third seal is formed by pressing the second sealing ring with the second compression ring. This significantly improves the sealing performance between the main valve body and the side valve body. Even if the first and second sealing rings age and deform, the presence of the PTFE sealing bushing and the multiple sealing rings can still ensure the sealing performance of the ball valve and reduce the probability of leakage between the main valve body and the side valve body after long-term use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-sealing ball valve according to the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0019] Attached icon number

[0020] 1. Main valve body, 2. Side valve body, 3. Valve seat, 4. Ball core, 5. Valve stem, 6. Third sealing ring, 7. PTFE sealing bushing, 8. Threaded post, 9. Nut, 10. Second sealing ring groove, 11. Second extrusion ring, 12. First sealing ring groove, 13. First extrusion ring, 14. Second sealing ring, 15. Raised step, 16. Step structure, 17. Detailed Implementation

[0021] To better illustrate the content of this utility model, the following description is provided in conjunction with the accompanying drawings and embodiments:

[0022] have Figures 1-2 As shown, this utility model discloses a ball valve with high sealing performance, including a main valve body 1 and side valve bodies 2 located on both sides of the main valve body 1. A valve seat 3 is provided on the opposite side surface of the two side valve bodies 2. A ball core 4 located inside the main valve body 1 is provided between the two valve seats 3. A valve stem 5 rotatably connected to the main valve body 1 is installed on the ball core 4. A first sealing ring groove 13 is also provided on the side surface of the side valve body 2 near the main valve body 1. A first sealing ring 12 is provided in the first sealing ring groove 13. A second sealing ring groove 10 is provided on the two sides of the main valve body 1 near the side valve bodies 2. A second sealing ring 15 is provided in the second sealing ring groove 10.

[0023] Furthermore, the main valve body 1 is provided with a first compression ring 14 on both sides near the side valve body 2, which can be precisely inserted into the first sealing ring groove 13 to compress the first sealing ring 12.

[0024] Furthermore, a second compression ring 11 for compressing the second sealing ring 15 is provided on the side surface of the side valve body 2 near the main valve body 1, which can be precisely inserted into the second sealing ring groove 10.

[0025] Furthermore, the annular side surfaces of the first extrusion ring portion 14 and the second extrusion ring portion 11 abut against each other.

[0026] Furthermore, a PTFE sealing bushing 7 is fitted on the side of the valve seat 3 near the ball core 4, and the outer annular surface of the PTFE sealing bushing 7 abuts against the inner annular wall of the main valve body 1.

[0027] Furthermore, a stepped structure 17 is provided on the outer ring surface of the PTFE sealing bushing 7, and the stepped structure 17 abuts and matches the raised step 16 on the inner side of the main valve body 1.

[0028] Furthermore, a threaded post 8 passes through between the two side valve bodies 2, and the two ends of the threaded post 8 are threaded with nuts 9 for pressing and fixing the side valve body 2 and the main valve body 1 together.

[0029] Furthermore, a third sealing ring 6 is provided between the valve stem 5 and the main valve body 1.

[0030] Specifically, the first seal is formed by the PTFE sealing bushing 7 between the valve seat 3 and the main valve body 1, the second seal is formed by the first compression ring 14 pressing the first sealing ring 12, and the third seal is formed by the second compression ring 11 pressing the second sealing ring 15. This greatly improves the sealing performance between the main valve body 1 and the side valve body 2 of the ball valve. Even if the first sealing ring 12 and the second sealing ring 15 age and deform, the presence of the PTFE sealing bushing 7 and the setting of multiple sealing rings can still ensure the sealing performance of the ball valve and reduce the probability of water leakage between the main valve body 1 and the side valve body 2 after long-term use.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A ball valve with high sealing performance, comprising a main valve body (1) and side valve bodies (2) located on both sides of the main valve body (1), wherein valve seats (3) are provided on opposite side surfaces of the two side valve bodies (2), and a ball core (4) located inside the main valve body (1) is provided between the two valve seats (3), and a valve stem (5) rotatably connected to the main valve body (1) is mounted on the ball core (4), characterized in that: A first sealing ring groove (13) is provided on one side of the side valve body (2) near the main valve body (1), and a first sealing ring (12) is provided in the first sealing ring groove (13). A second sealing ring groove (10) is provided on both sides of the main valve body (1) near the side valve body (2), and a second sealing ring (15) is provided in the second sealing ring groove (10).

2. The ball valve with high sealing performance according to claim 1, characterized in that: The main valve body (1) is provided with a first extrusion ring (14) on both sides near the side valve body (2), which can fit into the first sealing ring groove (13) to extrude the first sealing ring (12).

3. A high-sealing ball valve according to claim 2, characterized in that: The side valve body (2) is also provided with a second extrusion ring (11) on the side surface near the main valve body (1), which can fit into the second sealing ring groove (10) and is used to extrude the second sealing ring (15).

4. A high-sealing ball valve according to claim 3, characterized in that: The annular side surfaces of the first extrusion ring (14) and the second extrusion ring (11) abut against each other.

5. A high-sealing ball valve according to claim 4, characterized in that: The valve seat (3) is also fitted with a PTFE sealing bushing (7) on the side near the ball core (4), and the outer ring surface of the PTFE sealing bushing (7) abuts against the inner ring wall of the main valve body (1).

6. A high-sealing ball valve according to claim 5, characterized in that: The outer ring surface of the PTFE sealing bushing (7) is also provided with a stepped structure (17), which abuts and matches the raised step (16) on the inner side of the main valve body (1).

7. A high-sealing ball valve according to claim 6, characterized in that: A threaded post (8) runs through the two side valve bodies (2), and nuts (9) are threaded at both ends of the threaded post (8) to press and fix the side valve body (2) and the main valve body (1) together.

8. A high-sealing ball valve according to claim 7, characterized in that: A third sealing ring (6) is provided between the valve stem (5) and the main valve body (1).

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