Internal balance elastic ball valve seat

Abstract

The utility model discloses an internal balance elastic ball valve seat which comprises a valve seat body, an inner channel, a bottom check block, a sealing block, a first driving check block, a spacer block, a supporting check block, a built-in limiting component and a sealing spring are arranged in the valve seat body, and a main channel for connecting the inner channel with the outside is formed in a ball valve. The utility model has the following advantages and effects: the sealing spring can be detached from the main channel by pushing out the spacer block, and the sealing spring does not need to be detached after the valve body and the valve seat are detached, so that convenience is brought to the replacement of the sealing spring.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an internally balanced elastic ball valve seat. Background Technology

[0002] The ball valve body is the main structural part of the ball valve. Its function is to house the ball and provide an interface for connecting pipelines. The ball valve contains a ball, a seat, and a flow channel. The rotation of the ball controls the opening or closing of the flow channel, and the seat abuts against the ball to seal the flow channel.

[0003] In actual use, the frequent opening and closing of ball valves leads to friction between the ball and the valve seat. Wear and tear on the sealing surface between the ball and the valve seat can cause fluid leakage. Even when the valve is closed, leakage can still occur, making it impossible to effectively isolate the fluid.

[0004] To address this issue, existing technologies incorporate a sealing spring, whose elasticity enhances the seal between the valve seat and the ball. However, during application, the sealing spring is susceptible to fatigue damage and material aging, leading to a decrease in its elastic modulus and ultimately causing it to lose its original elasticity. Therefore, periodic replacement of the sealing spring is necessary. However, replacing the sealing spring in existing technologies is extremely cumbersome, requiring the removal of the valve body and seat, and necessitating the use of specialized tools such as spring removers, screwdrivers, and wrenches. This process is not only multi-step but also carries the risk of damaging the valve body or other components during removal. Utility Model Content

[0005] The purpose of this invention is to provide an internally balanced elastic ball valve seat to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] An internally balanced elastic ball valve seat includes a seat body, which is fixed inside the ball valve and abuts against the ball to achieve a seal on the flow channel.

[0008] The valve seat body has a transversely penetrating inner channel. A bottom stop is fixedly installed on the right side of the lower wall of the inner channel. There is a gap between the bottom stop and the upper wall of the inner channel. A sealing block is slidably installed in the inner channel. The sealing block can extend out of the inner channel after passing through the gap between the bottom stop and the upper wall of the inner channel to abut against the ball. A first active stop is fixed at the left end of the sealing block. The first active stop can abut against the bottom stop to limit the position of the sealing block.

[0009] The inner channel is also provided with a partition and a support block. The partition is located to the right of the support block. The valve seat body is provided with a built-in limiting component that can limit the position of the support block. A sealing spring is provided between the support block and the partition. The elastic force of the sealing spring can keep the sealing block stable against the ball.

[0010] The ball valve has a main channel that connects the inner channel to the outside. When the built-in limiting component releases its restriction on the support block, the outer push block can remove the sealing spring from the main channel.

[0011] A further configuration is as follows: a limiting groove is formed in the lower part of the inner channel of the valve seat body, the upper end of the limiting groove is connected to the inner channel, the built-in limiting component includes an upper stop block, the upper stop block is fixed to the upper end of the right wall of the limiting groove, there is a gap between the upper stop block and the left wall of the limiting groove, a limiting block is slidably arranged in the limiting groove, the limiting block can extend out of the upper end of the limiting groove after passing through the gap between the upper stop block and the left wall of the limiting groove; a limiting notch is formed at the lower end of the supporting stop block for the limiting block to extend into.

[0012] The lower end of the limiting block is fixed with a second active stop block, which can abut against the upper stop block to limit the position of the limiting block; a limiting spring is provided between the lower end of the limiting groove and the second active stop block, and the elastic force of the limiting spring can keep the limiting block moving upward.

[0013] A further feature is that the upper left side of the limiting block has a clearance ramp.

[0014] A further feature is that: both the second active stop block and the upper stop block have notches on their right sides, and the notches of the two will cooperate to form a first inner cavity; the valve seat body has a first air passage connected to the first inner cavity; the valve seat body also has a vertical air passage connected to the first air passage; and the ball valve surface is provided with a port that connects the vertical air passage to the outside.

[0015] A further feature is that a first micro control valve is provided on the first air passage to control its opening and closing, and the first micro control valve is located on the surface of the ball valve.

[0016] A further configuration is as follows: there is a gap between the upper end of the first active stop block and the upper wall of the inner channel; a second inner cavity is formed between the partition block, the first active stop block and the sealing block; a second air passage is opened in the valve seat body and connected to the second inner cavity; the second air passage is connected to the vertical air passage.

[0017] A further feature is that a second micro control valve is provided on the second air passage to control its opening and closing, and the second micro control valve is located on the surface of the ball valve.

[0018] A further feature is that the right end of the sealing block is filled with a rubber pad.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, the valve seat body is fixed inside the ball valve. The sealing block can move towards the ball under the elastic force of the sealing spring, and then maintain stable contact with the ball to improve the sealing performance of the ball valve. The first active stop block can abut against the bottom stop block to limit the position of the sealing block. The support stop block can provide support force to the left end of the sealing spring, allowing the sealing spring to apply elastic force to the sealing block. The built-in limiting component can limit the position of the support stop block. The sealing spring can be removed from the main channel by pushing out the partition block, without removing the valve body and valve seat first, which brings convenience to the replacement of the sealing spring.

[0021] 2. In this utility model, the limiting block in the built-in limiting component will move upward under the elastic force of the limiting spring and can extend into the limiting notch to limit the support block; the upper block and the second active block can limit the position of the limiting block by abutting each other.

[0022] 3. The clearance slope at the upper end of the limit block can be squeezed and moved downward during the contact with the support block, which facilitates the pushing in of the support block.

[0023] 4. In this utility model, the pipe can be connected to an external air pump to introduce gas. The gas can enter the first inner cavity after passing through the vertical air passage and the first air passage. After the gas fills the first inner cavity, it can push down the second active stop block and the limiting block, so that the limiting block can be moved down out of the limiting notch and the supporting stop block can be removed.

[0024] 5. The first micro control valve in this utility model can be manually operated from the outside. When the limit block moves down out of the limit notch, the first micro control valve can be manually controlled to close to prevent gas leakage and keep the limit block hidden in the limit groove.

[0025] 6. In this utility model, the gas can enter the second inner cavity after passing through the vertical air passage and the second air passage. After the gas fills the second inner cavity, it can push the second active stop block, the sealing spring and the partition block to the left, so that the sealing spring can be smoothly pressed out of the main passage and then removed. It has the advantages of quick and convenient disassembly of the sealing spring.

[0026] 7. The second micro control valve in this utility model can be manually operated from the outside. When it is necessary to keep the limit block hidden in the limit groove, the second micro control valve can be closed to allow gas to be smoothly introduced into the first inner cavity.

[0027] 8. The rubber gasket in this utility model can improve the sealing performance between the sealing block and the ball. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0029] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0030] In the diagram: 11. Ball valve; 12. Ball; 21. Valve seat body; 22. Inner passage; 23. Bottom stop; 24. Sealing block; 25. First active stop; 26. Partition block; 27. Support stop; 271. Limiting notch; 28. Sealing spring; 31. Main passage; 41. Limiting groove; 42. Upper stop; 43. Limiting block; 431. Avoidance slope; 44. Second active stop; 45. Limiting spring; 51. First inner cavity; 52. First air passage; 53. Pipe port; 61. First micro control valve; 71. Second inner cavity; 72. Second air passage; 81. Second micro control valve; 91. Rubber pad. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] As attached Figure 1 and 2 As shown;

[0033] This embodiment discloses an internally balanced elastic ball valve seat, including a valve seat body 21. After the valve seat body 21 is fixed inside the ball valve 11, it can abut against the ball 12 to achieve sealing of the flow channel.

[0034] The valve seat body 21 has a transversely penetrating inner channel 22. A bottom stop 23 is fixedly installed on the right side of the lower wall of the inner channel 22. There is a gap between the bottom stop 23 and the upper wall of the inner channel 22. A sealing block 24 is slidably installed in the inner channel 22. The sealing block 24 can extend out of the inner channel 22 after passing through the gap between the bottom stop 23 and the upper wall of the inner channel 22 to abut against the ball 12. A first active stop 25 is fixed to the left end of the sealing block 24. The first active stop 25 can abut against the bottom stop 23 to limit the position of the sealing block 24.

[0035] The inner channel 22 is also provided with a partition block 26 and a support block 27. The partition block 26 is located to the right of the support block 27. The valve seat body 21 is provided with a built-in limiting component that can limit the position of the support block 27. A sealing spring 28 is provided between the support block 27 and the partition block 26. The elastic force of the sealing spring 28 can keep the sealing block 24 stable against the ball 12.

[0036] The ball valve 11 has a main channel 31 that connects the inner channel 22 to the outside. When the built-in limiting component releases the limiting of the support block 27, the outer push block 26 can remove the sealing spring 28 from the main channel 31.

[0037] The valve seat body 21 has a limiting groove 41 below the inner channel 22. The upper end of the limiting groove 41 communicates with the inner channel 22. The built-in limiting component includes an upper stop block 42, which is fixed to the upper end of the right wall of the limiting groove 41. There is a gap between the upper stop block 42 and the left wall of the limiting groove 41. A limiting block 43 is slidably disposed in the limiting groove 41. The limiting block 43 can extend out of the upper end of the limiting groove 41 after passing through the gap between the upper stop block 42 and the left wall of the limiting groove 41. The lower end of the support block 27 has a limiting notch 271 for the limiting block 43 to extend into.

[0038] The lower end of the limiting block 43 is fixed with a second active stop block 44, which can abut against the upper stop block 42 to limit the position of the limiting block 43; a limiting spring 45 is provided between the lower end of the limiting groove 41 and the second active stop block 44, and the elastic force of the limiting spring 45 can keep the limiting block 43 moving upward.

[0039] The upper left side of the limiting block 43 has a section of avoidance slope 431.

[0040] The second active stop block 44 and the upper stop block 42 both have notches on their right sides, and the notches of the two will cooperate to form a first inner cavity 51. A first air passage 52 connected to the first inner cavity 51 is opened in the valve seat body 21. A vertical air passage connected to the first air passage 52 is also opened in the valve seat body 21. The ball valve 11 has a pipe port 53 on its surface that connects the vertical air passage to the outside.

[0041] Among them, a first micro control valve 61 is provided on the first air passage 52 to control its opening and closing, and the first micro control valve 61 is located on the surface of the ball valve 11.

[0042] There is a gap between the upper end of the first active stop block 25 and the upper wall of the inner channel 22. A second inner cavity 71 is formed between the partition block 26, the first active stop block 25 and the sealing block 24. A second air passage 72 connected to the second inner cavity 71 is opened in the valve seat body 21. The second air passage 72 is connected to the vertical air passage.

[0043] It should be noted that the second airway 72 is not connected to the inner airway 22, and the second inner airway 22 will bypass the inner airway 22 and connect to the second inner cavity 71.

[0044] Among them, a second micro control valve 81 is provided on the second air passage 72 to control its opening and closing, and the second micro control valve 81 is located on the surface of the ball valve 11.

[0045] The right end of the sealing block 24 is filled with a rubber pad 91.

[0046] The working principle of this embodiment is as follows:

[0047] The process of installing sealing spring 28 is as follows:

[0048] 1. Close the second micro control valve 81 and open the first micro control valve 61; connect the output pipe of the external air pump to the port 53, and the gas can enter the first inner cavity 51 after passing through the vertical air passage and the first air passage 52. After the gas fills the first inner cavity 51, it can push down the second active stop block 44 and the limiting block 43. The limiting block 43 is in the state of being hidden in the limiting groove 41; close the first micro control valve 61 to prevent gas leakage in the first inner cavity 51, and the limiting block 43 remains hidden in the limiting groove 41.

[0049] 2. Push the partition block 26 and sealing spring 28 from the main channel 31 into the inner channel 22; open the first micro control valve 61, the gas in the first inner cavity 51 leaks, and the limit block 43 will be held to move upward out of the limit groove 41 under the elastic force of the limit spring 45;

[0050] 3. Push the support block 27 from the main channel 31 into the inner channel 22. During this process, the support block 27 will contact the avoidance slope 431 of the limiting block 43. Along the avoidance slope 431, the support block 27 can continuously squeeze the limiting block 43, causing it to move downward. When the limiting notch 271 of the support block 27 corresponds to the position of the limiting block 43, the limiting block 43 will extend into the limiting notch 271 under the elastic force of the limiting spring 45 to limit the support block 27. The user can sense the change in feedback force during the above process, thus knowing that the limiting block 43 has been locked. The process of removing the sealing spring 28 is as follows:

[0051] 1. When the first micro control valve 61 and the second micro control valve 81 are opened, air can enter the first inner cavity 51 and the second inner cavity 71 respectively, and the limiting block 43 remains hidden in the limiting groove 41.

[0052] 2. Air will continuously fill the second inner cavity 71, and then push the partition 26 to the left. The sealing spring 28 and the support block 27 will also move to the left. Finally, the partition 26, the sealing spring 28 and the support block 27 will be pressed out of the main channel 31 together, so as to remove the sealing spring 28.

[0053] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A valve seat for an internally balanced elastic ball valve, characterized in that: It includes a valve seat body (21), which is fixed inside the ball valve (11) and can abut against the ball (12) to achieve sealing of the flow channel; The valve seat body (21) has a transversely penetrating inner channel (22). A bottom stop (23) is fixedly installed on the right side of the lower wall of the inner channel (22). There is a gap between the bottom stop (23) and the upper wall of the inner channel (22). A sealing block (24) is slidably installed in the inner channel (22). The sealing block (24) can extend out of the inner channel (22) after passing through the gap between the bottom stop (23) and the upper wall of the inner channel (22) to abut against the ball (12). A first active stop (25) is fixed at the left end of the sealing block (24). The first active stop (25) can abut against the bottom stop (23) to limit the position of the sealing block (24). The inner channel (22) is also provided with a partition (26) and a support block (27). The partition (26) is located to the right of the support block (27). The valve seat body (21) is provided with a built-in limiting component that can limit the position of the support block (27). A sealing spring (28) is provided between the support block (27) and the partition (26). The elastic force of the sealing spring (28) can keep the sealing block (24) stable against the ball (12). The ball valve (11) has a main channel (31) that connects the inner channel (22) to the outside. When the built-in limiting component releases the limiting of the support block (27), the outer push block (26) can remove the sealing spring (28) from the main channel (31).

2. The valve seat of an internally balanced elastic ball valve according to claim 1, characterized in that: The valve seat body (21) has a limiting groove (41) below the inner channel (22). The upper end of the limiting groove (41) is connected to the inner channel (22). The built-in limiting component includes an upper stop block (42). The upper stop block (42) is fixed to the upper end of the right wall of the limiting groove (41). There is a gap between the upper stop block (42) and the left wall of the limiting groove (41). A limiting block (43) is slidably arranged in the limiting groove (41). The limiting block (43) can extend out of the upper end of the limiting groove (41) after passing through the gap between the upper stop block (42) and the left wall of the limiting groove (41). The lower end of the support block (27) has a limiting notch (271) for the limiting block (43) to extend into. The lower end of the limiting block (43) is fixed with a second active stop block (44), which can abut against the upper stop block (42) to limit the position of the limiting block (43); a limiting spring (45) is provided between the lower end of the limiting groove (41) and the second active stop block (44), and the elastic force of the limiting spring (45) can keep the limiting block (43) moving upward.

3. The valve seat of an internally balanced elastic ball valve according to claim 2, characterized in that: The upper left side of the limiting block (43) has a section of avoidance slope (431).

4. The valve seat of an internally balanced elastic ball valve according to claim 2, characterized in that: The second active stop block (44) and the upper stop block (42) both have notches on their right sides, and the notches of the two will cooperate to form a first inner cavity (51). The valve seat body (21) has a first air passage (52) connected to the first inner cavity (51). The valve seat body (21) also has a vertical air passage connected to the first air passage (52). The ball valve (11) has a port (53) on its surface that connects the vertical air passage to the outside.

5. The valve seat of an internally balanced elastic ball valve according to claim 4, characterized in that: A first micro control valve (61) is provided on the first air passage (52) to control its opening and closing, and the first micro control valve (61) is located on the surface of the ball valve (11).

6. The valve seat of an internally balanced elastic ball valve according to claim 4, characterized in that: There is a gap between the upper end of the first active stop block (25) and the upper wall of the inner channel (22). A second inner cavity (71) is formed between the partition block (26), the first active stop block (25) and the sealing block (24). A second air passage (72) connected to the second inner cavity (71) is opened in the valve seat body (21). The second air passage (72) is connected to the vertical air passage.

7. The valve seat of an internally balanced elastic ball valve according to claim 6, characterized in that: A second micro control valve (81) is provided on the second air passage (72) to control its opening and closing, and the second micro control valve (81) is located on the surface of the ball valve (11).

8. A valve seat for an internally balanced elastic ball valve according to claim 6, characterized in that: The right end of the sealing block (24) is filled with a rubber pad (91).

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