Pneumatic ball valve with double-sealing structure

Abstract

The utility model discloses a pneumatic ball valve with a double-sealing structure, and particularly relates to the technical field of pneumatic ball valves, which comprises a ball valve shell, a valve core is rotatably connected in the ball valve shell, a connecting rod is fixedly connected to the bottom of the valve core, the connecting rod penetrates through the bottom of the ball valve shell, and a limiting hole is formed in one side of the connecting rod. A sliding block is slidably connected into the connecting rod, a mounting groove is formed in the sliding block, a limiting rod is movably arranged in the mounting groove, a poke rod is fixedly connected to the top of the limiting rod, the outer side wall of the limiting rod is sleeved with a spring, one end of the spring is fixedly connected with the poke rod, and the other end of the spring is fixedly connected with the sliding block. The bottom of the sliding block is fixedly connected with a valve switch, and the outer side wall of the valve switch is fixedly connected with a rotating rod. And the valve switch is moved to the bottom of the ball valve shell, so that the situation that the valve switch occupies limited installation space, and consequently engineering cost and construction difficulty are increased is avoided, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic ball valve technology, and more specifically, to a pneumatic ball valve with a double sealing structure. Background Technology

[0002] Double-seal pneumatic ball valves are a common type of valve. They have two sealing structures, typically including a main seal and an auxiliary seal. The main seal is usually achieved through a metal-to-metal contact seal between the ball and the valve seat, providing high sealing performance and wear resistance. The auxiliary seal is generally located on the stem of the ball valve and is used to prevent media leakage into the environment, providing additional sealing protection. It also acts as a seal to contain the media when maintenance or replacement of the main seal is required. A pneumatic ball valve is a valve whose opening and closing action is driven by a pneumatic actuator (such as a pneumatic piston or pneumatic diaphragm). By controlling the pressure and direction of the air source, the rotation of the ball is achieved, thereby opening and closing the valve.

[0003] A search revealed that publication number CN222963436U discloses a double-seal pneumatic track ball valve, including a ball valve housing. A pneumatic actuator is located on the top of the ball valve housing. An interface is located on the top of the ball valve housing, and an infrared receiver is installed inside the interface. The infrared receiver has a receiving part on its surface. By incorporating a connecting rod, a valve switch, a limit hole, and a telescopic crossbar, when the pneumatic actuator malfunctions, the operator needs to manually operate the ball valve. This is achieved by inserting the telescopic crossbar into the corresponding limit hole on the valve switch. Adjusting the length of the telescopic crossbar actuates the valve switch, thereby rotating the connecting rod and opening and closing the ball valve. This design makes it easier for operators to operate the valve, saving time and effort and improving work efficiency. The inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] When the device is in use, the ball valve is opened and closed by manually operating the valve. However, because the valve is too large, it will take up limited installation space, which will complicate the pipeline layout and may even require redesigning the pipeline route, increasing the project cost and construction difficulty.

[0005] Therefore, a pneumatic ball valve with a double sealing structure is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pneumatic ball valve with a double sealing structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic ball valve with a double-sealing structure, comprising a ball valve housing, a valve core rotatably connected inside the ball valve housing, a connecting rod fixedly connected to the bottom of the valve core, the connecting rod penetrating the bottom of the ball valve housing, a limit hole formed on one side of the connecting rod, a slider slidably connected inside the connecting rod, an installation groove formed inside the slider, a limit rod movably disposed inside the installation groove, a toggle rod fixedly connected to the top of the limit rod, a spring sleeved on the outer wall of the limit rod, one end of the spring fixedly connected to the toggle rod, the other end of the spring fixedly connected to the slider, a valve switch fixedly connected to the bottom of the slider, and a rotating rod fixedly connected to the outer wall of the valve switch.

[0008] Preferably, the ball valve housing has an internal connecting channel, and connecting pipes are fixedly connected to both sides of the ball valve housing. A flange is fixedly connected to one side of each connecting pipe, and the ball valve housing, connecting pipes, and flanges are integrally formed.

[0009] Preferably, a plug rod is fixedly connected to the top of the valve core, the plug rod penetrates the ball valve housing, a sealing ring is provided at the connection between the valve core and the ball valve housing, and a sealing strip is provided at the connection between the plug rod and the ball valve housing.

[0010] Preferably, an interface is fixedly connected to the top center of the ball valve housing, a support base is fixedly connected to the top of the ball valve housing, an opening is provided on the top of the support base, and fixing bolts are symmetrically arranged on the top of the support base.

[0011] Preferably, a pneumatic actuator is provided above the support base, and a bearing is fixedly connected to the bottom of the pneumatic actuator, with a rotating rod rotatably connected inside the bearing.

[0012] Preferably, an installation block is fixedly sleeved on the outer side wall of the rotating rod, the surface of the installation block is provided with a threaded hole, and the bottom of the rotating rod is provided with an insertion hole.

[0013] Preferably, a connecting part is fixedly connected to one side of the pneumatic actuator, and an air pipe is fixedly connected to the bottom of the connecting part.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. Compared with existing technologies, this pneumatic ball valve with a double-sealing structure utilizes a toggle rod, a limit rod, a spring, a limit hole, and a slider in a coordinated arrangement. First, the toggle rod moves the limit rod, causing the slider inside the connecting rod to slide the valve switch upwards. After sliding to the bottom of the ball valve housing, the toggle rod is released, and the spring compresses the toggle rod, causing it to move the limit rod towards the limit hole on the side wall of the connecting rod and insert it into the limit hole. This limits and fixes the slider and the valve switch. This structure, by moving the valve switch to the bottom of the ball valve housing, avoids the valve switch occupying limited installation space, thus preventing increased engineering costs and construction difficulties, and improves the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the ball valve housing of this utility model.

[0017] Figure 2 This is a three-dimensional cross-sectional structural diagram of the ball valve housing of this utility model.

[0018] Figure 3 This is a three-dimensional cross-sectional structural diagram of the connecting rod of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the pneumatic actuator of this utility model.

[0020] The attached figures are labeled as follows: 1. Ball valve housing; 2. Connecting rod; 3. Sliding block; 4. Valve switch; 5. Rotating rod; 6. Actuating rod; 7. Spring; 8. Limiting hole; 9. Connecting channel; 10. Valve core; 11. Connecting pipe; 12. Flange; 13. Interface; 14. Support base; 15. Insert rod; 16. Fixing bolt; 17. Opening; 18. Pneumatic actuator; 19. Connecting part; 20. Air pipe; 21. Bearing; 22. Rotating rod; 23. Mounting block; 24. Threaded hole; 25. Insertion hole; 26. Limiting rod; 27. Sealing ring; 28. Sealing strip; 29. ​​Mounting groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] As attached Figures 1 to 4The pneumatic ball valve shown includes a ball valve housing 1, a valve core 10 rotatably connected inside the ball valve housing 1, a connecting rod 2 fixedly connected to the bottom of the valve core 10, the connecting rod 2 passing through the bottom of the ball valve housing 1, a limit hole 8 opened on one side of the connecting rod 2, a slider 3 slidably connected inside the connecting rod 2, an installation groove 29 opened inside the slider 3, a limit rod 26 movably arranged inside the installation groove 29, a toggle rod 6 fixedly connected to the top of the limit rod 26, a spring 7 sleeved on the outer wall of the limit rod 26, one end of the spring 7 fixedly connected to the toggle rod 6, the other end of the spring 7 fixedly connected to the slider 3, a valve switch 4 fixedly connected to the bottom of the slider 3, and a rotating rod 5 fixedly connected to the outer wall of the valve switch 4.

[0024] In use, the device first moves the limiting rod 26 by the actuating rod 6, causing the slider 3 to slide upward inside the connecting rod 2, and then slides to the bottom of the ball valve housing 1. The actuating rod 6 is then released, and the spring 7 compresses the actuating rod 6, causing the actuating rod 6 to move the limiting rod 26 toward the limiting hole 8 opened on the side wall of the connecting rod 2 and insert it into the limiting hole 8, thereby limiting and fixing the slider 3 and the valve switch 4. This structure, by moving the valve switch 4 to the bottom of the ball valve housing 1, avoids the valve switch 4 occupying the limited installation space, thus avoiding increased engineering costs and construction difficulties, and improves the practicality of the device.

[0025] Example 2

[0026] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0027] In a preferred embodiment, the ball valve housing 1 has an internal connecting channel 9. Connecting pipes 11 are fixedly connected to both sides of the ball valve housing 1, and a flange 12 is fixedly connected to one side of each connecting pipe 11. The flange 12 can be connected to other pipes via a fixing bolt. The ball valve housing 1, connecting pipes 11, and flange 12 are integrally formed, and the ball valve housing 1, connecting pipes 11, and flange 12 are interconnected. A insertion rod 15 is fixedly connected to the top of the valve core 10. The insertion rod 15 is used to open and close the valve core 10, and it penetrates the ball valve housing. 1. A sealing ring 27 is provided at the connection between the valve core 10 and the ball valve housing 1, and a sealing strip 28 is provided at the connection between the insert rod 15 and the ball valve housing 1. The sealing ring 27 and the sealing strip 28 can prevent liquid leakage. In use, the flange 12 is first connected to other pipes through the fixing bolt, and then the liquid can flow into the interior of the ball valve housing 1 through the flange 12 and the connecting pipe 11, and then flow out through the ball valve housing 1. At the same time, the sealing ring 27 and the sealing strip 28 can prevent the liquid from leaking out from the interior of the ball valve housing 1.

[0028] In a preferred embodiment, an interface 13 is fixedly connected to the top center of the ball valve housing 1. The interface 13 fits into the rotating rod 22. A support base 14 is fixedly connected to the top of the ball valve housing 1. An opening 17 is provided on the top of the support base 14. Fixing bolts 16 are symmetrically arranged on the top of the support base 14 to facilitate the fixing of the pneumatic actuator 18. The pneumatic actuator 18 is arranged above the support base 14. A bearing 21 is fixedly connected to the bottom of the pneumatic actuator 18. A rotating rod 22 is rotatably connected inside the bearing 21. A mounting block 23 is fixedly sleeved on the outer wall of the rotating rod 22. A threaded hole 24 is provided on the surface of the mounting block 23. An insertion hole 25 is provided at the bottom of the rotating rod 22. The hole 25 engages with the insert rod 15. A connecting part 19 is fixedly connected to one side of the pneumatic actuator 18. An air pipe 20 is fixedly connected to the bottom of the connecting part 19. The pneumatic actuator 18 is connected to the air source through the air pipe 20 at the bottom of the connecting part 19 to make it run. In use, first engage the insert hole 25 on the rotating rod 22 with the insert rod 15, then pass the fixing bolt 16 through the threaded hole 24 to fix the pneumatic actuator 18. Then connect the air pipe 20 to the air source to make the pneumatic actuator 18 run. Subsequently, the pneumatic actuator 18 drives the rotating rod 22 and the insert rod 15 to rotate. At the same time, the insert rod 15 drives the valve core 10 to rotate, thereby opening and closing the valve core 10.

[0029] The working process of this utility model is as follows: First, the flange 12 is connected to other pipes by fixing bolts. Then, the insertion hole 25 on the rotating rod 22 is engaged with the insertion rod 15. Then, the fixing bolt 16 is passed through the threaded hole 24 to fix the pneumatic actuator 18. Then, the air pipe 20 is connected to the air source to make the pneumatic actuator 18 run. Subsequently, the pneumatic actuator 18 drives the rotating rod 22 and the insertion rod 15 to rotate. At the same time, the insertion rod 15 drives the valve core 10 to rotate, thereby opening the valve core 10. Then, the liquid can flow into the ball valve housing 1 through the flange 12 and the connecting pipe 11, and then flow out through the ball valve housing 1. At the same time, the sealing ring 27 and the sealing strip 28 can prevent the liquid from leaking out of the ball valve housing 1. When the pneumatic actuator 18 fails unexpectedly, the rotating rod 5 can be manually rotated to make the rotating rod 5 drive the valve to open or close. 4 and connecting rod 2 rotate, and then the rotating connecting rod 2 drives the valve core 10 to rotate, thereby closing the valve core 10. When the valve core 10 does not need to be manually operated, the limiting rod 26 is first moved by the toggle rod 6, and then the slider 3 drives the valve switch 4 to slide upward inside the connecting rod 2. After sliding to the bottom of the ball valve housing 1, the toggle rod 6 is released. At this time, the spring 7 squeezes the toggle rod 6, so that the toggle rod 6 drives the limiting rod 26 to approach the limiting hole 8 opened on the side wall of the connecting rod 2 and insert it into the limiting hole 8, thereby limiting and fixing the slider 3 and the valve switch 4. The setting of this structure, by moving the valve switch 4 to the bottom of the ball valve housing 1, avoids the valve switch 4 occupying the limited installation space and increasing the engineering cost and construction difficulty, thus improving the practicality of the device. The above is the working principle of a pneumatic ball valve with a double sealing structure.

Claims

1. A pneumatic ball valve with a double-sealing structure, comprising a ball valve housing (1), characterized in that: A valve core (10) is rotatably connected inside the ball valve housing (1). A connecting rod (2) is fixedly connected to the bottom of the valve core (10). The connecting rod (2) passes through the bottom of the ball valve housing (1). A limit hole (8) is opened on one side of the connecting rod (2). A slider (3) is slidably connected inside the connecting rod (2). An installation groove (29) is opened inside the slider (3). A limit rod (26) is movably arranged inside the installation groove (29). A toggle rod (6) is fixedly connected to the top of the limit rod (26). A spring (7) is sleeved on the outer wall of the limit rod (26). One end of the spring (7) is fixedly connected to the toggle rod (6). The other end of the spring (7) is fixedly connected to the slider (3). A valve switch (4) is fixedly connected to the bottom of the slider (3). A rotating rod (5) is fixedly connected to the outer wall of the valve switch (4).

2. A pneumatic ball valve with a double sealing structure according to claim 1, characterized in that: The ball valve housing (1) has a connecting channel (9) inside. Both sides of the ball valve housing (1) are fixedly connected to connecting pipes (11). A flange (12) is fixedly connected to one side of the connecting pipe (11). The ball valve housing (1), connecting pipe (11), and flange (12) are integrally formed.

3. A pneumatic ball valve with a double sealing structure according to claim 1, characterized in that: A plug rod (15) is fixedly connected to the top of the valve core (10). The plug rod (15) penetrates the ball valve housing (1). A sealing ring (27) is provided at the connection between the valve core (10) and the ball valve housing (1). A sealing strip (28) is provided at the connection between the plug rod (15) and the ball valve housing (1).

4. A pneumatic ball valve with a double sealing structure according to claim 1, characterized in that: An interface (13) is fixedly connected to the top center of the ball valve housing (1), and a support base (14) is fixedly connected to the top of the ball valve housing (1). An opening (17) is provided on the top of the support base (14), and fixing bolts (16) are symmetrically arranged on the top of the support base (14).

5. A pneumatic ball valve with a double sealing structure according to claim 4, characterized in that: A pneumatic actuator (18) is provided above the support base (14), and a bearing (21) is fixedly connected to the bottom of the pneumatic actuator (18). A rotating rod (22) is rotatably connected inside the bearing (21).

6. A pneumatic ball valve with a double sealing structure according to claim 5, characterized in that: An installation block (23) is fixedly sleeved on the outer side wall of the rotating rod (22), and a threaded hole (24) is opened on the surface of the installation block (23). An insertion hole (25) is opened at the bottom of the rotating rod (22).

7. A pneumatic ball valve with a double sealing structure according to claim 5, characterized in that: A connecting part (19) is fixedly connected to one side of the pneumatic actuator (18), and an air pipe (20) is fixedly connected to the bottom of the connecting part (19).

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