Self-sealing plug valve

Abstract

The utility model relates to the technical field of oil extraction equipment, in particular to a self-sealing plug valve which comprises a valve body, a plug body is arranged in the valve body, and a transmission assembly used for driving the plug body to rotate is arranged at the top of the valve body. The cock body comprises a first cock body and second cock bodies, the second cock bodies are located on the two sides of the first cock body, a water through hole is formed in the outer portion of the first cock body, first inclined faces are arranged on the two sides of the first cock body, a second inclined face is arranged on one side of each second cock body, and the second inclined faces are connected to the first inclined faces in a sliding mode. The first plug body is pushed to move downwards through the transmission assembly, when the first plug body moves downwards, the first inclined faces on the two sides of the first plug body can push and extrude the second inclined faces on the second plug body, the second plug body is expanded outwards, and under the pushing and extruding effect of the first plug body, the outer side of the second plug body is tightly attached to the inner wall of the water passing hole of the valve body. The second plug body and the inner wall of the valve body are connected more tightly, gaps are avoided, the sealing performance of the plug valve is improved, and normal use of the plug valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production equipment, in particular to a self-sealing plug valve. Background Art

[0002] Plug valves are widely used in various industries, especially heavy industry and the chemical industry. They are opened or closed by rotating the plug 90 degrees to align or separate the opening on the valve body. Plug valves are ideal for shutting off and connecting media.

[0003] Application number: CN201520509133.1 "A plug valve", the valve body is made of alloy steel, and the plug is made of ceramic, which is not easy to rust; the use of rotating bushing and sealing ring can achieve sealing, effectively prevent the corrosion of the plug and valve body due to gas or liquid leakage, and extend the service life of the plug.

[0004] However, after the above-mentioned plug valve is closed, the plug and the rotating bushing may not fit tightly enough and a gap may appear, thereby causing a relatively poor sealing performance and affecting the normal use of the plug valve. Utility Model Content

[0005] The purpose of the utility model is to provide a self-sealing plug valve to improve the sealing performance of the plug valve and solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a self-sealing plug valve, comprising a valve body, a plug body is provided inside the valve body, and a transmission assembly for driving the plug body to rotate is provided on the top of the valve body;

[0007] The plug body includes: plug body 1 and plug body 2, the plug body 2 is located on both sides of the plug body 1, the outside of the plug body 1 is provided with a water hole, the two sides of the plug body 1 are provided with inclined surface 1, and one side of the plug body 2 is provided with inclined surface 2, the inclined surface 2 is slidably connected to the inclined surface 1, the outside of the inclined surface 1 is fixedly connected to one side of the slide rail, the outside of the slide rail is slidably connected to the groove wall of the slide groove, the slide groove is opened at the inclined surface 2, and the side walls of the plug body 1 and the plug body 2 are slidably connected to the side walls inside the valve body.

[0008] Preferably, the transmission assembly includes: a connecting cylinder, the bottom end of the connecting cylinder is fixedly connected to the top end of the plug body, and the inner ring of the connecting cylinder is slidably sleeved on the side of the bottom end of the rotating shaft.

[0009] Preferably, a limiting groove is provided on the inner wall of the connecting cylinder, the groove wall of the limiting groove is slidably connected to the outside of the limiting block, and one side of the limiting block is fixedly connected to the side of the bottom end of the rotating shaft.

[0010] Preferably, the top end of the rotating shaft is fixedly connected to the inside of the worm wheel, and the side of the worm wheel is engaged with the outside of the worm.

[0011] Preferably, one end of the worm is fixedly connected to the output shaft of the drive motor, the outside of the drive motor is fixedly mounted on the top of the bracket, and one side of the bracket is fixedly connected to one side of the valve body.

[0012] Preferably, a spiral groove is provided on the side of the connecting cylinder, the groove wall of the spiral groove is slidably connected to one end of the slider, and the other end of the slider is fixedly connected to both sides of the U-shaped plate.

[0013] Preferably, the bottom end of the U-shaped plate is fixedly connected to the top of the valve body, and the top of the U-shaped plate is rotatably connected to the side of the rotating shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model pushes the plug body 1 downward through the transmission assembly. When the plug body moves downward, the inclined surfaces 1 on both sides thereof will push the inclined surfaces 2 on the plug body 2, causing the plug body 2 to expand outward. Under the pushing action of the plug body 1, the outer side of the plug body 2 is tightly attached to the inner wall of the water through hole of the valve body, making the connection between the plug body 2 and the inner wall of the valve body tighter, avoiding the occurrence of gaps, thereby improving the sealing performance of the plug valve and ensuring the normal use of the plug valve.

[0016] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the plug body of the utility model;

[0020] Figure 4 This is a schematic diagram of the transmission assembly structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the connecting tube structure of the utility model;

[0022] Figure 6 This is a schematic diagram of the closed state structure of the utility model.

[0023] In the figure: 1. Plug body; 11. Inclined surface 2; 12. Inclined surface 1; 13. Plug body 1; 14. Slide rail; 15. Slide groove; 16. Plug body 2; 2. Transmission assembly; 21. Worm gear; 22. Rotating shaft; 23. Connecting cylinder; 24. Spiral groove; 25. Slider; 26. U-shaped plate; 27. Worm; 28. Drive motor; 29. Bracket; 210. Limit groove; 211. Limit block; 3. Valve body. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-6 The utility model provides a technical solution: a self-sealing plug valve, comprising: a valve body 3, a plug body 1 is provided inside the valve body 3, and a transmission component 2 is provided on the top of the valve body 3 for driving the plug body 1 to rotate.

[0026] Transmission assembly 2 includes a connecting tube 23, the bottom end of which is fixedly connected to the top end of plug body 13. The inner ring of connecting tube 23 slides over the side of the bottom end of rotating shaft 22. A limiting groove 210 is defined on the inner wall of connecting tube 23. The groove wall of limiting groove 210 slides over the outside of a limiting block 211, one side of which is fixedly connected to the side of the bottom end of rotating shaft 22.

[0027] Furthermore, the limiting groove 210 and the limiting block 211 cooperate to prevent the rotating shaft 22 and the connecting cylinder 23 from rotating relative to each other, so that the rotating shaft 22 drives the connecting cylinder 23 to rotate.

[0028] The top of the rotating shaft 22 is fixedly connected to the inside of the worm gear 21, and the side of the worm gear 21 engages with the outside of the worm 27. One end of the worm 27 is fixedly connected to the output shaft of the drive motor 28. The outside of the drive motor 28 is fixedly mounted on the top of the bracket 29, and one side of the bracket 29 is fixedly connected to a side of the valve body 3. A spiral groove 24 is formed on the side of the connecting tube 23. The groove wall of the spiral groove 24 is slidably connected to one end of the slider 25. The other end of the slider 25 is fixedly connected to both sides of the U-shaped plate 26. The bottom end of the U-shaped plate 26 is fixedly connected to the top of the valve body 3, and the top of the U-shaped plate 26 is rotatably connected to the side of the rotating shaft 22.

[0029] Furthermore, the drive motor 28 is started, and the drive motor 28 drives the worm 27 to rotate, the worm 27 drives the worm wheel 21 to rotate counterclockwise, the worm wheel 21 drives the rotating shaft 22 to rotate counterclockwise, the rotating shaft 22 drives the connecting cylinder 23 to rotate counterclockwise, the connecting cylinder 23 drives the plug body 13 to rotate counterclockwise, the plug body 13 drives the two groups of plug bodies 2 16 to rotate counterclockwise through the slide rail 14, so that the two groups of plug bodies 2 16 block the water holes on both sides of the valve body 3, as shown in FIG. Figure 6 As shown, water is blocked from flowing through the valve body 3, thereby closing the plug valve.

[0030] The plug body 1 includes: plug body 13 and plug body 2 16, plug body 2 16 is located on both sides of plug body 13, water holes are provided on the outside of plug body 13, inclined plane 12 is provided on both sides of plug body 13, inclined plane 2 11 is provided on one side of plug body 2 16, inclined plane 2 11 is slidably connected to inclined plane 12, the outside of inclined plane 12 is fixedly connected to one side of the slide rail 14, the outside of the slide rail 14 is slidably connected to the groove wall of the slide groove 15, the slide groove 15 is opened at inclined plane 2 11, and the side walls of plug body 13 and plug body 2 16 are slidably connected to the side walls inside the valve body 3.

[0031] Furthermore, when the rotating shaft 22 drives the connecting tube 23 to rotate counterclockwise, the spiral groove 24 on the outside of the connecting tube 23 also rotates accordingly. Under the sliding cooperation of the spiral groove 24 and the slider 25, the connecting tube 23 will move downward while rotating counterclockwise. The downward movement of the connecting tube 23 will push the plug body 13 to move downward. When the plug body 13 moves downward, the inclined surfaces 12 on both sides thereof will push the inclined surfaces 11 on the plug body 2 16, causing the plug body 2 16 to expand outward. Under the pushing action of the plug body 13, the outer side of the plug body 2 16 is tightly attached to the inner wall of the water hole of the valve body 3, making the connection between the plug body 2 16 and the inner wall of the valve body 3 tighter, avoiding the appearance of gaps, thereby improving the sealing of the plug valve and ensuring the normal use of the plug valve.

[0032] Working principle: When we need to close the plug valve, start the drive motor 28, the drive motor 28 drives the worm 27 to rotate, the worm 27 drives the worm wheel 21 to rotate counterclockwise, the worm wheel 21 drives the rotating shaft 22 to rotate counterclockwise, the rotating shaft 22 drives the connecting cylinder 23 to rotate counterclockwise, the connecting cylinder 23 drives the plug body 13 to rotate counterclockwise, the plug body 13 drives the two sets of plug bodies 2 16 to rotate counterclockwise through the slide rail 14, so that the two sets of plug bodies 2 16 block the water holes on both sides of the valve body 3, as shown in FIG. Figure 6 As shown, water is blocked from flowing through the valve body 3, thereby closing the plug valve.

[0033] When the rotating shaft 22 drives the connecting tube 23 to rotate counterclockwise, the spiral groove 24 on the outside of the connecting tube 23 also rotates accordingly. Under the sliding cooperation of the spiral groove 24 and the slider 25, the connecting tube 23 will move downward while rotating counterclockwise. The downward movement of the connecting tube 23 will push the plug body 13 to move downward. When the plug body 13 moves downward, the inclined surfaces 12 on both sides thereof will push the inclined surfaces 11 on the plug body 2 16, causing the plug body 2 16 to expand outward. Under the pushing action of the plug body 13, the outer side of the plug body 2 16 is tightly attached to the inner wall of the water through hole of the valve body 3, making the connection between the plug body 2 16 and the inner wall of the valve body 3 tighter, avoiding the appearance of gaps, thereby improving the sealing of the plug valve and ensuring the normal use of the plug valve.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-sealing plug valve, characterized in that: It comprises a valve body (3), a plug body (1) is provided inside the valve body (3), and a transmission assembly (2) for driving the plug body (1) to rotate is provided on the top of the valve body (3); The plug body (1) comprises: a plug body (13) and a plug body (16), the plug body (16) is located on both sides of the plug body (13), the outside of the plug body (13) is provided with a water hole, the two sides of the plug body (13) are provided with an inclined surface (12), one side of the plug body (16) is provided with an inclined surface (11), the inclined surface (11) is slidably connected to the inclined surface (12), the outside of the inclined surface (12) is fixedly connected to one side of the slide rail (14), the outside of the slide rail (14) is slidably connected to the groove wall of the slide groove (15), the slide groove (15) is opened at the inclined surface (11), and the side walls of the plug body (13) and the plug body (16) are slidably connected to the side walls inside the valve body (3).

2. A self-sealing plug valve according to claim 1, characterized in that: The transmission assembly (2) includes: a connecting tube (23), the bottom end of the connecting tube (23) is fixedly connected to the top end of the plug body (13), and the inner ring of the connecting tube (23) is slidably sleeved on the side of the bottom end of the rotating shaft (22).

3. A self-sealing plug valve according to claim 2, characterized in that: A limiting groove (210) is provided on the inner wall of the connecting cylinder (23), the groove wall of the limiting groove (210) is slidably connected to the outside of a limiting block (211), and one side of the limiting block (211) is fixedly connected to the side of the bottom end of the rotating shaft (22).

4. A self-sealing plug valve according to claim 2, characterized in that: The top end of the rotating shaft (22) is fixedly connected to the inside of the worm wheel (21), and the side of the worm wheel (21) is engaged with the outside of the worm (27).

5. The self-sealing plug valve according to claim 4, characterized in that: One end of the worm (27) is fixedly connected to the output shaft of the drive motor (28), the outside of the drive motor (28) is fixedly mounted on the top of the bracket (29), and one side of the bracket (29) is fixedly connected to one side of the valve body (3).

6. The self-sealing plug valve according to claim 2, characterized in that: A spiral groove (24) is provided on the side of the connecting cylinder (23), the groove wall of the spiral groove (24) is slidably connected to one end of a slider (25), and the other end of the slider (25) is fixedly connected to both sides of the U-shaped plate (26).

7. The self-sealing plug valve according to claim 6, characterized in that: The bottom end of the U-shaped plate (26) is fixedly connected to the top of the valve body (3), and the top of the U-shaped plate (26) is rotatably connected to the side of the rotating shaft (22).

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