Gas ball valve

Abstract

The utility model discloses a gas ball valve which comprises a valve body, a flow channel is arranged in the valve body, a ball body is arranged in the flow channel in a rotating mode, a valve rod which is connected with the ball body and controls opening and closing of the flow channel is further arranged on the valve body, and an actuator which is connected with the valve rod is arranged outside the valve body. A driving part connected with the valve seat is arranged on the valve body and comprises a driving part and a moving part, a driving cavity is formed in the driving part, the driving part drives the valve seat to abut against the ball body, the moving part seals the driving cavity, a driving block is arranged on the ball body, the driving block is arranged on one side of the ball body, and when the ball body cuts off the flow channel, the driving part drives the valve seat to abut against the ball body. And the driving block drives the moving part to move. The ball valve has the following advantages and effects that the sealing performance between the ball body and the valve seat can be improved during cutting off, and the sealing performance of the valve is ensured.

Description

Technical Field

[0001] The utility model relates to the field of gas ball valves, and more specifically, to a gas ball valve. Background Art

[0002] Ball valves, whose opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve, can also be used for regulating and controlling fluids. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat with hard alloy overlay, which is particularly suitable for media containing fibers, tiny solid particles, etc. The valve core of the hard-sealed ball valve is alloy steel spray welding, and the sealing ring is alloy steel overlay, so the hard-sealed ball valve will not produce too much wear when opening and closing. Ball valves are a common structure among valves, and ball valves can well control the on and off of gas or liquid flowing in the pipeline.

[0003] The existing gas ball valve has high requirements for its own sealing when in use, especially when the gas ball valve is cut off, no leakage can occur. When cutting off, the pressure on one side will be greater than the pressure on the other side, causing gas leakage on the side with higher pressure, which can easily cause more serious consequences. Therefore, a gas valve that can improve the sealing performance of the valve body is needed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a gas ball valve which can enhance the sealing strength when the valve is cut off.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas ball valve, comprising a valve body, a flow channel is arranged in the valve body, a ball rotates in the flow channel, a valve stem connected to the ball and controlling the opening and closing of the flow channel is also arranged on the valve body, an actuator connected to the valve stem is arranged outside the valve body, and the characteristic is that a valve seat close to the ball is arranged in the valve body, a driving member connected to the valve seat is arranged on the valve body, the driving member comprises a driving part and a moving part, the driving part forms a driving cavity, the driving member drives the valve seat to press against the ball, the moving part seals the driving cavity, a driving block is arranged on the ball, the driving block is arranged on one side of the ball, and when the ball cuts off the flow channel, the driving block drives the moving part to move.

[0006] By adopting the above technical solution, a driving part and a moving part are provided to seal and connect the driving chamber. When the valve body is connected, the sealed gas flows normally in the driving chamber, and the driving chamber maintains the thrust of the valve seat on the ball. When the flow channel is cut off, the driving block drives the moving part to move the gas into the driving chamber. The gas increases the thrust of the valve seat on the ball, thereby ensuring the sealing of the cut-off state.

[0007] The utility model is further configured as follows: the moving part includes a sealing section and a driving section, the driving section is connected to the sealing section and is provided with two groups, an air intake groove is formed between the two groups of driving sections, when the flow channel is connected, the sealing section seals the driving cavity, when the flow channel is cut off, the air intake groove is connected to the driving cavity.

[0008] By adopting the above technical solution, a driving section and a sealing section are provided. When starting, the sealing section can seal the driving chamber, relying on the pressure of the driving chamber itself to squeeze the valve seat and the ball tightly. At the same time, when the driving section is provided to cooperate with the driving block, the air inlet groove is connected to the driving chamber, so that the internal pressure of the driving chamber is increased to enhance the sealing between the valve seat and the ball.

[0009] The utility model is further configured as follows: the moving part is also provided with a moving section which slides on the valve body, the moving section is connected to the sealing section, and the other end extends to one side of the ball, and a guiding inclined surface which cooperates with the driving block is formed on the moving section.

[0010] By adopting the above technical solution, the moving end extends to one side of the sphere to seal or connect with the driving cavity.

[0011] The utility model is further configured as follows: a limit spring connected to the moving part is arranged in the valve body, and the limit spring is connected to the moving part and drives the sealing section to seal the driving cavity.

[0012] By adopting the above technical solution and setting a limited position replacement, the driving chamber can be kept in a sealed and non-connected state.

[0013] The utility model is further configured as follows: a limit block is arranged in one section of the sealing section, a limit cavity is formed in the valve body, and the limit spring is connected to the limit and is located in the limit cavity.

[0014] By adopting the above technical solution, the sealing section is restricted to maintain the limit position and does not fall off.

[0015] The utility model is further configured as follows: the driving section is provided with an inclined edge located in the air inlet groove.

[0016] By adopting the above technical solution, the drive cavity casting is connected, which is more convenient and safer.

[0017] The utility model is further configured as follows: an inlet hole is provided on the valve body.

[0018] By adopting the above technical solution, it fits into the driving cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0020] Figure 2A three-dimensional diagram of a sphere according to an embodiment of the utility model;

[0021] Figure 3 This is an enlarged view of part A.

[0022] In the figure: 1. valve body; 12. flow channel; 13. sphere; 14. actuator; 15. valve seat; 2. driving part; 21. moving part; 22. driving chamber; 3. driving block; 41. sealing section; 42. driving section; 5. air inlet groove; 43. moving section; 431. guiding slope; 6. limiting spring; 61. limiting block; 7. inclined edge; 9. inlet hole. DETAILED DESCRIPTION

[0023] Reference Figures 1 to 3 The embodiments of the utility model are further described.

[0024] A gas ball valve comprises a valve body 1, a flow channel 12 is arranged in the valve body 1, a ball 13 rotates in the flow channel 12, a valve stem connected to the ball 13 and controlling the opening and closing of the flow channel 12 is also arranged on the valve body 1, and an actuator 14 connected to the valve stem is arranged outside the valve body 1. The valve body 1 is characterized in that a valve seat 15 close to the ball 13 is arranged in the valve body 1, a driving member connected to the valve seat 15 is arranged on the valve body 1, the driving member comprises a driving part 2 and a moving part 21, the driving part 2 forms a driving cavity 22, the driving member drives the valve seat 15 to press against the ball 13, the moving part 21 seals the driving cavity 22, a driving block 3 is arranged on the ball 13, the driving block 3 is arranged on one side of the ball 13, and when the ball 13 cuts off the flow channel 12, the driving block 3 drives the moving part 21 to move.

[0025] The moving part 21 includes a sealing section 41 and a driving section 42. The driving section 42 is connected to the sealing section 41 and is provided in two groups. An air inlet groove 5 is formed between the two groups of driving sections 42. When the flow channel 12 is connected, the sealing section 41 seals the driving chamber 22. When the flow channel 12 is cut off, the air inlet groove 5 is connected to the driving chamber 22.

[0026] The moving portion 21 is also provided with a moving section 43 that slides on the valve body 1 . The moving section 43 is connected to the sealing section 41 , and the other end extends to one side of the ball 13 . A guiding inclined surface 431 that matches the driving block 3 is formed on the moving section 43 .

[0027] A limit spring 6 connected to the moving part 21 is arranged in the valve body 1 . The limit spring 6 is connected to the moving part 21 and drives the sealing section 41 to seal the driving chamber 22 .

[0028] A limit block 61 is provided at one section of the sealing section 41, a limit cavity is formed in the valve body 1, and a limit spring 6 is connected to the limit and is located in the limit cavity.

[0029] The driving section 42 is provided with an inclined edge 7 located inside the air inlet groove 5 .

[0030] The valve body 1 is provided with an inlet hole 9 .

[0031] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A gas ball valve, comprising a valve body (1), wherein a flow channel (12) is arranged in the valve body (1), a ball (13) rotates in the flow channel (12), the valve body (1) is further provided with a valve stem connected to the ball (13) and controlling the opening and closing of the flow channel (12), and an actuator (14) connected to the valve stem is arranged outside the valve body (1), wherein: A valve seat (15) in close contact with the ball (13) is arranged in the valve body (1), and a driving member connected to the valve seat (15) is arranged on the valve body (1), and the driving member comprises a driving part (2) and a moving part (21), and the driving part (2) forms a driving cavity (22), and the driving member drives the valve seat (15) to press against the ball (13), and the moving part (21) seals the driving cavity (22), and a driving block (3) is arranged on the ball (13), and the driving block (3) is arranged on one side of the ball (13), and when the ball (13) cuts off the flow channel (12), the driving block (3) drives the moving part (21) to move.

2. The gas ball valve according to claim 1, characterized in that: The moving part (21) comprises a sealing section (41) and a driving section (42); the driving section (42) is connected to the sealing section (41) and is provided in two groups; an air inlet groove (5) is formed between the two groups of the driving sections (42); when the flow channel (12) is connected, the sealing section (41) seals the driving chamber (22); when the flow channel (12) is cut off, the air inlet groove (5) is connected to the driving chamber (22).

3. The gas ball valve according to claim 2, characterized in that: The movable portion (21) is also provided with a movable section (43) that slides on the valve body (1); the movable section (43) is connected to the sealing section (41), and the other end extends to one side of the ball (13); and a guiding inclined surface (431) that cooperates with the driving block (3) is formed on the movable section (43).

4. The gas ball valve according to claim 3 is characterized in that: A limit spring (6) connected to the moving part (21) is arranged in the valve body (1); the limit spring (6) is connected to the moving part (21) and drives the sealing section (41) to seal the driving chamber (22).

5. The gas ball valve according to claim 4 is characterized in that: A limit block (61) is provided in one section of the sealing section (41), a limit cavity is formed in the valve body (1), and the limit spring (6) is connected to the limit and is located in the limit cavity.

6. The gas ball valve according to claim 2, characterized in that: The driving section (42) is provided with an inclined edge (7) located inside the air inlet groove (5).

7. The gas ball valve according to claim 2, characterized in that: The valve body (1) is provided with an inlet hole (9).

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