High-pressure ball valve sealing device

Abstract

The utility model discloses a high-pressure ball valve sealing device, which relates to the technical field of high-pressure ball valves and comprises a ball valve body, the inside of the ball valve body is communicated with a connecting cylinder, the upper surface of the connecting cylinder is connected with a fixing cylinder, the inside of the fixing cylinder is provided with a limiting groove, and the inside of the limiting groove is slidably connected with a limiting plate. A first fixing ring is connected to one side of the limiting plate, a second fixing ring is engaged with the outer portion of the first fixing ring, and through cooperation of the second threaded rod, the first fixing ring and the second fixing ring, when the first fixing ring and the second fixing ring are engaged, rotation of the first threaded rod can be locked; the rotating shaft can be accurately adjusted through arrangement of gear teeth in a first fixing ring and a second fixing ring, after a first threaded rod drives the second fixing ring to be adjusted, the second fixing ring can be locked by controlling the first fixing ring to move, and the function of stably fixing the rotating shaft in the high-pressure ball valve is achieved; and the sealing stability of the high-pressure ball valve is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure ball valves, in particular to a sealing device for a high-pressure ball valve. Background Art

[0002] High-pressure ball valve is a type of valve, which is mainly used to control the flow of media inside pipelines. It can control the on-off of media inside pipelines, and can also be used to control the unit flow volume of fluids. It can be used as a switch and cut-off valve and is widely used in industries such as petroleum refining and chemical industry.

[0003] In order to ensure the sealing performance of the high-pressure ball valve, a valve seat is installed inside the ball valve. The valve seat can be driven to move inside the high-pressure ball valve through the control of the rotating shaft, so as to seal the inside of the high-pressure ball valve. However, when in use, the ball valve will be affected by the vibration of the internal liquid and external factors, which will cause the rotating shaft to loosen during use and the rotating shaft cannot be stably fixed, resulting in reduced sealing effect of the ball valve. In order to solve this technical problem, the utility model proposes a high-pressure ball valve sealing device. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-pressure ball valve sealing device, which can effectively solve the problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A high-pressure ball valve sealing device comprises a ball valve body, the interior of the ball valve body is connected with a connecting cylinder, the upper surface of the connecting cylinder is connected with a fixing cylinder, a limiting groove is arranged inside the fixing cylinder, the interior of the limiting groove is slidably connected with a limiting plate, one side of the limiting plate is connected with a fixing ring 1, the outside of the fixing ring 1 is meshed with a fixing ring 2, a threaded rod 1 is fixedly installed inside the fixing ring 2, a fixing plate 1 is fixedly installed inside the limiting groove, the internal thread of the fixing plate 1 is connected with a threaded rod 2, the outer surface of the threaded rod 2 is rotatably connected with a fixing plate 2, a support cylinder is installed on one side of the fixing plate 2, and a spring is installed on the inner wall of the support cylinder.

[0007] Preferably, a positioning ring 1 is fixedly installed on the outer surface of the fixed cylinder, a positioning ring 2 is detachably connected to the outer surface of the positioning ring 1, a sealing cover is fixedly installed on the inner wall of the positioning ring 2, and the outer surface of the threaded rod 1 is connected to the internal thread of the sealing cover.

[0008] Preferably, a fixed handle is installed on the outside of the threaded rod 1, a valve seat is installed on the other end of the threaded rod 1, and the outer surface of the threaded rod 1 is sleeved with the inside of the fixing ring 1.

[0009] Preferably, the outer surface of the second fixing plate is slidably connected to the inner wall of the limiting groove, and the outer surface of the supporting tube is slidably connected to the inner wall of the connecting tube.

[0010] Preferably, the other end of the spring is connected to the interior of the fixing ring 1, the outer surface of the fixing ring 1 is slidably connected to the interior of the fixing tube, and the outer surface of the fixing ring 2 is slidably connected to the interior of the fixing tube.

[0011] Preferably, a baffle is fixedly mounted on one end of the second threaded rod, the upper surface of the baffle is in contact with the lower surface of the second fixed plate, and a rotating handle is mounted on the other end of the second threaded rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, through the cooperation between the threaded rod two, the fixing ring one and the fixing ring two, the rotation of the threaded rod one can be locked when the fixing ring one and the fixing ring two are meshed, and the threaded rod one can be stably fixed by the fixing ring one and the fixing ring two after adjustment, and the rotating shaft can be accurately adjusted by setting the internal gear teeth of the fixing ring one and the fixing ring two, which is convenient for use, and the threaded rod two can further drive the fixing ring one to move, and when the threaded rod one drives the fixing ring two to adjust, the fixing ring two can be locked by controlling the movement of the fixing ring one, thereby realizing the function of stably fixing the internal rotating shaft of the high-pressure ball valve, which is beneficial to ensuring the stability of the high-pressure ball valve when it is sealed.

[0014] The utility model provides components such as a spring and a limit plate, so that the spring can push the fixing ring 1 to move elastically. When the position of the fixing ring 2 is fixed, the support tube can be driven to move through the threaded rod 2. At this time, the support tube can drive the spring to compress the fixing ring 1 to move, and the elastic force of the spring can be adjusted to prevent the spring elastic force from being reduced after long-term use after the two ends of the spring are directly fixed, which is convenient for long-term use. The limit plate can limit the movement of the fixing ring 1 and can control the fixing ring 1 to move linearly inside the fixing tube to ensure stability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-pressure ball valve sealing device of the utility model;

[0016] Figure 2 The utility model is a high pressure ball valve sealing device Figure 1 A partial enlarged view of the figure;

[0017] Figure 3 This is a schematic diagram of the interior of a fixed cylinder of a high-pressure ball valve sealing device of the utility model;

[0018] Figure 4It is a schematic diagram of a fixing ring component of a high-pressure ball valve sealing device of the utility model;

[0019] Figure 5 The utility model is a schematic diagram of a spring component of a high-pressure ball valve sealing device.

[0020] In the figure: 1. ball valve body; 2. connecting tube; 3. fixing tube; 4. limiting groove; 5. limiting plate; 6. fixing ring 1; 7. fixing ring 2; 8. threaded rod 1; 9. fixing plate 1; 10. threaded rod 2; 11. fixing plate 2; 12. supporting tube; 13. spring; 14. positioning ring 1; 15. positioning ring 2; 16. sealing cover; 17. fixing handle; 18. valve seat; 19. baffle; 20. turning handle. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-5 As shown, a high-pressure ball valve sealing device includes a ball valve body 1, the interior of the ball valve body 1 is connected to a connecting tube 2, the upper surface of the connecting tube 2 is connected to a fixing tube 3, the outer surface of the fixing tube 3 is fixedly installed with a positioning ring 14, the outer surface of the positioning ring 14 is detachably connected with a positioning ring 2 15, the positioning ring 14 and the positioning ring 2 15 are connected by fixing bolts, which is convenient for disassembly. After disassembly, the internal components can be replaced, and the inner wall of the positioning ring 2 15 is fixedly installed with a sealing cover 16, and the outer surface of the threaded rod 18 is connected to the internal thread of the sealing cover 16.

[0023] A limiting groove 4 is provided inside the fixed cylinder 3, and a limiting plate 5 is slidably connected inside the limiting groove 4. Two groups of limiting plates 5 are provided and are symmetrically arranged. A fixing ring 6 is connected to one side of the limiting plate 5. The limiting plate 5 can limit the movement of the fixing ring 6 and can control the fixing ring 6 to move linearly inside the fixed cylinder 3 to ensure stability during use. The outer surface of the fixing ring 6 is slidably connected to the inside of the fixed cylinder 3.

[0024] The outside of the fixing ring 16 is meshed with a fixing ring 27, and the outer surface of the fixing ring 27 is slidably connected with the inside of the fixing tube 3. The insides of the fixing ring 16 and the fixing ring 27 are both provided with the same number of gear teeth. When the fixing ring 16 and the fixing ring 27 are meshed, the fixing ring 16 will not rotate under the action of the limit plate 5. At this time, the fixing ring 27 will be fixed and will not rotate. A threaded rod 18 is fixedly installed inside the fixing ring 27. The threaded rod 18 can be accurately adjusted by the meshing of the fixing ring 16 and the internal gear teeth of the fixing ring 27. The threaded rod 18 can be further fixed by the self-locking of the fixing ring 6.

[0025] A fixed handle 17 is installed on the outside of the threaded rod 8, and the fixed handle 17 can be used to control the rotation of the threaded rod 8. A valve seat 18 is installed on the other end of the threaded rod 8. The rotation of the threaded rod 8 can control the movement of the valve seat 18 inside the ball valve body 1, and can seal the inside of the ball valve body 1. The outer surface of the threaded rod 8 is sleeved with the inside of the fixing ring 6.

[0026] A fixing plate 9 is fixedly installed inside the limiting groove 4, and a threaded rod 10 is connected to the internal thread of the fixing plate 9. A rotating handle 20 is installed at the other end of the threaded rod 10. The threaded rod 10 can be driven to rotate by rotating the handle 20, and the threaded rod 10 can move up and down by rotating the internal thread of the fixing plate 9.

[0027] The outer surface of the threaded rod 10 is rotatably connected to a fixed plate 11, and the outer surface of the fixed plate 11 is slidably connected to the inner wall of the limit groove 4. A baffle 19 is fixedly installed at one end of the threaded rod 10, and the upper surface of the baffle 19 is in contact with the lower surface of the fixed plate 11. The rotation of the threaded rod 10 can drive the fixed plate 11 to move up and down. The baffle 19 can prevent the fixed plate 11 from losing contact with the threaded rod 10, thereby ensuring stability during use.

[0028] A support tube 12 is installed on one side of the fixing plate 11, and the outer surface of the support tube 12 is slidably connected to the inner wall of the connecting tube 2. The support tube 12 can be driven to move up and down by rotating the threaded rod 10. A spring 13 is installed on the inner wall of the support tube 12, and the other end of the spring 13 is connected to the inside of the fixing ring 6. When the support tube 12 moves, it can drive the spring 13 to move and prop up the fixing ring 6 to move. At this time, the fixing ring 6 can engage with the fixing ring 7. The elastic force of the spring 13 can be adjusted by adjusting the position of the fixing plate 11. When the elastic force of the spring 13 decreases after being used for a period of time, the position of the support tube 12 can be adjusted. The position of the fixing ring 6 is supported by the spring 13. When the fixing ring 6 is vibrated, the spring 13 can also absorb some vibration force, which can improve the service life.

[0029] When in use, the threaded rod 2 10 is rotated to control the fixing plate 2 11 to move to the bottom of the limit groove 4. At this time, the threaded rod 18 is rotated to adjust the position of the valve seat 18. After the threaded rod 18 is rotated, the fixing plate 2 11 is driven to move up through the threaded rod 2 10. At this time, the fixing plate 2 11 can drive the support tube 12 to move, and the support tube 12 can drive the spring 13 to move. The spring 13 can prop up the fixing ring 1 6, and the fixing ring 1 6 can be driven to engage with the fixing ring 2 7 through the spring 13. Under the action of the limit plate 5, the fixing ring 6 will not rotate. When the fixing ring 1 6 is engaged with the fixing ring 2 7, the rotation of the threaded rod 8 can be limited. The elastic force of the spring 13 can also be adjusted by controlling the position of the support tube 12 to ensure a longer service life of the spring 13.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-pressure ball valve sealing device, comprising a ball valve body (1), characterized in that: The interior of the ball valve body (1) is connected to a connecting tube (2), the upper surface of the connecting tube (2) is connected to a fixing tube (3), a limiting groove (4) is provided inside the fixing tube (3), the interior of the limiting groove (4) is slidably connected to a limiting plate (5), one side of the limiting plate (5) is connected to a fixing ring 1 (6), the exterior of the fixing ring 1 (6) is meshed with a fixing ring 2 (7), a threaded rod 1 (8) is fixedly installed inside the fixing ring 2 (7), a fixing plate 1 (9) is fixedly installed inside the limiting groove (4), the interior of the fixing plate 1 (9) is threadedly connected to a threaded rod 2 (10), the outer surface of the threaded rod 2 (10) is rotatably connected to a fixing plate 2 (11), a support tube (12) is installed on one side of the fixing plate 2 (11), and a spring (13) is installed on the inner wall of the support tube (12).

2. A high pressure ball valve sealing device according to claim 1, characterized in that: A positioning ring 1 (14) is fixedly mounted on the outer surface of the fixing tube (3), a positioning ring 2 (15) is detachably connected to the outer surface of the positioning ring 1 (14), a sealing cover (16) is fixedly mounted on the inner wall of the positioning ring 2 (15), and the outer surface of the threaded rod 1 (8) is connected to the inner thread of the sealing cover (16).

3. A high pressure ball valve sealing device according to claim 1, characterized in that: A fixed handle (17) is installed on the outside of the threaded rod (8), a valve seat (18) is installed on the other end of the threaded rod (8), and the outer surface of the threaded rod (8) is sleeved with the inside of the fixed ring (6).

4. A high pressure ball valve sealing device according to claim 1, characterized in that: The outer surface of the second fixing plate (11) is slidably connected to the inner wall of the limiting groove (4), and the outer surface of the supporting tube (12) is slidably connected to the inner wall of the connecting tube (2).

5. A high pressure ball valve sealing device according to claim 1, characterized in that: The other end of the spring (13) is connected to the interior of the fixing ring (6), the outer surface of the fixing ring (6) is slidably connected to the interior of the fixing tube (3), and the outer surface of the fixing ring (7) is slidably connected to the interior of the fixing tube (3).

6. A high pressure ball valve sealing device according to claim 1, characterized in that: A baffle (19) is fixedly mounted on one end of the second threaded rod (10), the upper surface of the baffle (19) contacts the lower surface of the second fixed plate (11), and a rotating handle (20) is mounted on the other end of the second threaded rod (10).

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