Oil pipe plug valve convenient to connect and fix

Abstract

The invention relates to the technical field of plug valves, in particular to an oil pipe plug valve convenient to connect and fix. The oil pipe plug valve comprises a valve body, communicating pipes are symmetrically and fixedly connected to the left end and the right end of the valve body, and first flange plates are fixedly installed at outer ports of the communicating pipes; when the connecting cylinder is pushed towards the inner end of the inner cylinder, the movable rubber ring moves towards one side of the circular truncated cone ring and makes contact with the outer wall of the circular truncated cone ring, the circular truncated cone ring expands the movable rubber ring towards the outer side, the outer wall of the movable rubber ring makes contact with the inner wall of the inner cylinder more tightly, and the sealing effect is improved; one end of the long bolt penetrates through the first flange plate, the second flange plate and the first sealing ring and then is screwed with one nut, then penetrates through the second sealing ring, the fourth flange plate and the second sealing ring and then is screwed with the other nut, and the two nuts are screwed tightly in sequence, so that the connecting cylinder and the oil pipe are fixed, and the plug valve and the oil pipe are connected conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of plug valves, and specifically to an oil pipe plug valve that is convenient for connection and fixation. Background Technique

[0002] The oil pipe plug valve is a manual control valve in the drill string circulation system, used in emergency situations for dealing with blowouts. At the same time, it can also be used as a mud saving valve to prevent mud from splashing onto the rotary table, and it is one of the blowout preventers in the drill pipe.

[0003] Chinese Patent CN202021899537.3 discloses a switch positioning device for an oil pipe plug valve, including a valve body, a valve core, and a rotating key. The valve core is arranged inside the valve body. A through hole is provided on the outer wall of the valve body. The rotating key penetrates into the valve body through the through hole from the outside of the valve body and is connected to the valve core. A pair of positioning blocks are symmetrically arranged on the inner wall of the through hole. A concave surface is provided on the side of the positioning block facing the rotating key. The two concave surfaces are in contact with each other and form a cavity. The rotating key is arranged inside the cavity. The rotating key is cylindrical. A pair of protrusions are symmetrically arranged in the middle of the outer wall of the rotating key. The sum of the diameter of the rotating key and the height of the pair of protrusions is between the maximum inner diameter and the minimum inner diameter of the cavity, with reliable positioning and can effectively prevent the valve core from rotating excessively.

[0004] However, in the above solution, the length of the plug valve cannot be extended. When connecting two oil pipes through the plug valve, due to the fixed length and position of the oil pipes, after cutting the old oil pipe port, the length of the oil pipe is insufficient, and it is inconvenient to fix the plug valve on the oil pipe. Therefore, the present invention proposes an oil pipe plug valve that is convenient for connection and fixation to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil pipe plug valve that is convenient for connection and fixation to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An oil pipe plug valve that is convenient for connection and fixation, including: a valve body, communication pipes are symmetrically and fixedly connected to the left and right ends of the valve body. Flange one is fixedly installed at the outer port of the communication pipe. The inner end of each communication pipe is inserted with an inner cylinder. Flange two is fixedly installed at the outer end of the inner cylinder. Flange two is fixedly connected to flange one through fixing bolts.

[0007] A fixing ring is fixedly installed at the inner end of the inner cylinder. A rubber ring one is fixedly installed at the outer end of the fixing ring. The outer end of the rubber ring one is in close contact with the inner wall of the communication pipe.

[0008] The inner end of the inner cylinder is inserted with a connecting cylinder. The inner end of the connecting cylinder is in close contact with the inner end side wall of the first rubber ring. A sealing component is fixedly installed on the outer wall of the connecting cylinder. A third flange is fixedly installed at the outer end of the connecting cylinder. The third flange is fixedly connected to the fourth flange at one end of the oil pipe, the first flange, and the second flange respectively through long bolts.

[0009] Preferably, the cross-sections of the fixing ring and the inner cylinder are T-shaped, the first rubber ring is L-shaped, a first limiting ring is fixedly installed at one end of the first rubber ring. The first limiting ring is made of metal. The first limiting ring and the first rubber ring are sleeved on the outer end of the fixing ring, and the outer end of the first rubber ring is in contact with the inner wall of the communicating pipe. A second guiding slope is provided at the lower end of the first rubber ring.

[0010] Preferably, a sealing cylinder is arranged on the outer side between the inner cylinder and the communicating pipe. The sealing cylinder is made of rubber. The inner end of the sealing cylinder is in close contact with the outer wall of the inner cylinder, and the outer end of the sealing cylinder is in close contact with the inner wall of the communicating pipe. A first sealing ring is fixedly installed at the outer end of the sealing cylinder. The first sealing ring is located between the first flange and the second flange and is fixedly connected through fixing bolts.

[0011] Preferably, a first guiding slope is provided on the outer side of the inner end of the connecting cylinder. When the second flange is fixedly installed on the outer end of the first flange through fixing bolts, the inner end of the inner cylinder passes through the first guiding slope and is inserted into the inner side of the first rubber ring by extruding the first rubber ring.

[0012] Preferably, the sealing component includes a second limiting ring, a third limiting ring, a frustum ring, and a moving rubber ring. The second limiting ring is fixedly installed on the outer wall of the inner end of the connecting cylinder. A circular ring is fixedly installed inside the second limiting ring. The outer end of the circular ring can be in contact with the inner side of the fixing ring.

[0013] Preferably, the third limiting ring is fixedly installed on the outer wall of the outer end of the connecting cylinder. The frustum ring is fixedly sleeved on the outer wall of the connecting cylinder. The moving rubber ring is slidably sleeved on the outer wall of the connecting cylinder. The frustum ring is located between the third limiting ring and the moving rubber ring. The inner end of the moving rubber ring can be in contact with the outer wall of the frustum ring, and at the same time, the outer wall of the moving rubber ring is in contact with the inner wall of the inner cylinder.

[0014] Preferably, a number of second through holes are evenly provided on the side walls of the first flange, the second flange, and the first sealing ring. One end of the fixing bolt passes through the second through hole and is threadedly connected with a nut.

[0015] Preferably, the fourth flange is fixedly installed on the side wall of one end of the oil pipe, and a second sealing ring is fixedly installed at the outer end of the fourth flange.

[0016] Preferably, a number of first through holes are evenly provided on the side walls of the fourth flange, the second sealing ring, the first flange, the second flange, and the first sealing ring. One end of the long bolt passes through the first through hole and is threadedly connected with a nut.

[0017] Preferably, two nuts are threadedly connected to the outer wall of each long bolt, one nut abuts against the outer wall of the second flange, and the other nut abuts against the outer wall of the fourth flange.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the present invention, the inner cylinder is first fixed in the connecting pipe through the fixing bolts. When the connecting cylinder is inserted into the inner end of the inner cylinder, since the outer end of the moving rubber ring contacts the inner wall of the inner cylinder, when the connecting cylinder is pushed towards the inner end of the inner cylinder, the moving rubber ring will move towards the side of the frustum ring and contact the outer wall of the frustum ring. The frustum ring pushes the moving rubber ring outwards, making the outer wall of the moving rubber ring contact the inner wall of the inner cylinder more tightly, increasing the sealing effect. One end of the long bolt passes through the first flange, the second flange and the first sealing ring and then a nut is screwed on, and then passes through the second sealing ring, the fourth flange and the second sealing ring and then another nut is screwed on, and the two nuts are tightened in turn, so as to fix the connecting cylinder and the oil pipe, facilitating the connection of the plug valve and the oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view of the overall structure of the present invention;

[0021] Figure 2 is an exploded view of a part of the structure of the present invention;

[0022] Figure 3 is a cross-sectional view of a part of the structure of the present invention;

[0023] Figure 4 is the present invention Figure 3 is an enlarged view of the structure of area A in the present invention;

[0024] Figure 5 is the present invention Figure 3 is an enlarged view of the structure of area B in the present invention;

[0025] Figure 6 is a schematic diagram of the plug structure of the present invention;

[0026] Figure 7 is a schematic diagram of the flow stabilizing plate structure of the present invention.

[0027] In the figure: 1. Valve body; 2. Connecting pipe; 3. First flange; 4. First sealing ring; 5. Sealing cylinder; 6. Second flange; 7. Inner cylinder; 8. First limiting ring; 9. First rubber ring; 10. Fixed ring; 11. Connecting cylinder; 12. Third flange; 13. First guiding slope; 14. Second limiting ring; 15. Ring; 16. Third limiting ring; 17. Frustum ring; 18. Movable rubber ring; 19. Oil pipe; 20. Fourth flange; 21. Second sealing ring; 22. First through hole; 23. Second through hole; 24. Fixed bolt; 25. Long bolt; 26. Second guiding slope; 27. Rotating handle; 28. Plug cock; 29. Channel; 30. Flow stabilizing plate; 31. Rotating shaft; 32. Bearing seat. Detailed implementation mode

[0028] In order to clearly and completely describe the purpose, technical solution of the present invention and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 to 7 , the present invention provides a technical solution: an oil pipe plug valve convenient for connection and fixation, including: a valve body 1, connecting pipes 2 are symmetrically and fixedly connected to the left and right ends of the valve body 1, a first flange 3 is fixedly installed at the outer port of the connecting pipe 2, an inner cylinder 7 is inserted into the inner end of each connecting pipe 2, a second flange 6 is fixedly installed at the outer end of the inner cylinder 7, and the second flange 6 is fixedly connected to the first flange 3 through fixed bolts 24. A sealing cylinder 5 is arranged on the outer side between the inner cylinder 7 and the connecting pipe 2. The sealing cylinder 5 is made of rubber. The inner end of the sealing cylinder 5 is in close contact with the outer wall of the inner cylinder 7, and the outer end of the sealing cylinder 5 is in close contact with the inner wall of the connecting pipe 2. A first sealing ring 4 is fixedly installed at the outer end of the sealing cylinder 5. The first sealing ring 4 is supported by rubber. The first sealing ring 4 is located between the first flange 3 and the second flange 6 and is fixedly connected through fixed bolts 24. The first sealing ring 4 seals between the first flange 3 and the second flange 6, and the sealing cylinder 5 seals between the inner cylinder 7 and the connecting pipe 2. A plurality of second through holes 23 are evenly opened on the side walls of the first flange 3, the second flange 6 and the first sealing ring 4. One end of the fixed bolt 24 passes through the second through hole 23 and is threadedly connected with a nut, which is convenient for disassembling and assembling the inner cylinder 7, the first sealing ring 4 and the sealing cylinder 5.

[0030] A fixing ring 10 is fixedly installed at the inner end of the inner cylinder 7. The cross-sections of the fixing ring 10 and the inner cylinder 7 are T-shaped. The rubber ring 9 is L-shaped. A limiting ring 8 is fixedly installed at one end of the rubber ring 9. The limiting ring 8 is made of metal. The limiting ring 8 and the rubber ring 9 are sleeved on the outer end of the fixing ring 10, and the outer end of the rubber ring 9 contacts the inner wall of the connecting pipe 2. A guide slope 26 is provided at the lower end of the rubber ring 9. A rubber ring 9 is fixedly installed at the outer end of the fixing ring 10. The outer end of the rubber ring 9 contacts the inner wall of the connecting pipe 2 tightly. The rubber ring 9 9 plays a role in sealing between the connecting tube 2 and the inner tube 7. A guide slope 13 is provided on the outer side of the inner end of the connecting tube 11. When the flange 26 is fixed to the outer end of the flange 3 by the fixing bolts 24, the inner end of the inner tube 7 is inserted into the inner side of the rubber ring 9 through the extruded rubber ring 9 through the guide slope 13, so that the outer wall of the rubber ring 9 and the inner wall of the connecting tube 2 are more closely fitted. At the same time, the outer end of the connecting tube 11 and the inner wall of the rubber ring 9 are in close contact. The rubber ring 9 seals between the connecting tube 2 and the connecting tube 11, further increasing the sealing effect.

[0031] A sealing component is fixedly installed on the outer wall of the connecting tube 11, and a flange three 12 is fixedly installed on the outer end of the connecting tube 11. The flange three 12 is fixedly connected to the flange four 20 at one end of the oil pipe 19 and the flange one 3 and the flange two 6 through long bolts 25, thereby fixing the connecting tube 11 to the inner side of the inner tube 7.

[0032] The sealing component includes a limiting ring 2 14, a limiting ring 3 16, a truncated cone ring 17 and a movable rubber ring 18. The limiting ring 2 14 is fixedly installed on the inner end outer wall of the connecting tube 11. A circular ring 15 is fixedly installed on the inner side of the limiting ring 2 14. The outer end of the circular ring 15 can contact the inner side of the fixed ring 10 to seal the inner tube 7 and the connecting tube 11. The limiting ring 3 16 is fixedly installed on the outer end outer wall of the connecting tube 11. The truncated cone ring 17 is fixedly sleeved on the outer wall of the connecting tube 11. The movable rubber ring 18 is slidably sleeved on the outer wall of the connecting tube 11. The truncated cone ring 17 is located between the limiting ring 3 16 and the movable rubber ring 18. The inner end of the movable rubber ring 18 can contact the outer wall of the truncated cone ring 17. At the same time, the outer wall of the movable rubber ring 18 contacts the inner wall of the inner tube 7, thereby sealing the inner tube 7 and the connecting tube 11 again.

[0033] Specifically, when the connecting tube 11 is inserted into the inner end of the inner tube 7, since the outer end of the movable rubber ring 18 contacts the inner wall of the inner tube 7, when the connecting tube 11 is pushed toward the inner end of the inner tube 7, the movable rubber ring 18 moves toward one side of the conical ring 17 and contacts the outer wall of the conical ring 17. The conical ring 17 stretches the movable rubber ring 18 outward, so that the outer wall of the movable rubber ring 18 and the inner wall of the inner tube 7 are in closer contact, thereby increasing the sealing effect.

[0034] The fourth flange 20 is fixedly installed on the side wall of one end of the oil pipe 19. A second sealing ring 21 is fixedly installed at the outer end of the fourth flange 20. A number of first through holes 22 are evenly formed in the side walls of the fourth flange 20, the second sealing ring 21, the first flange 3, the second flange 6 and the first sealing ring 4. One end of a long bolt 25 passes through the first through hole 22 and is threadedly connected with a nut. Two nuts are threadedly connected to the outer wall of each long bolt 25. One nut abuts against the outer wall of the second flange 6, and the other nut abuts against the outer wall of the fourth flange 20. First, one end of the long bolt 25 passes through the first flange 3, the second flange 6 and the first sealing ring 4, and then a nut is screwed on. Then it passes through the second sealing ring 21, the fourth flange 20, and after passing through the second sealing ring 21, another nut is screwed on, and the two nuts are screwed tightly in sequence, thereby fixing the connecting cylinder 11 and the oil pipe 19.

[0035] Please refer to Figure 6 and Figure 7 , in some embodiments, the valve body 1 includes a rotary handle 27 and a plug 28. The plug 28 is fixed at the lower end of the rotary handle 27. A through channel 29 is formed in the plug 28. A flow stabilizing plate 30 is rotatably connected in the channel 29. Rotating shafts 31 are fixedly installed at the upper and lower ends of the flow stabilizing plate 30. The rotating shafts 31 are rotatably connected to the inner walls of the upper and lower ends of the channel 29 through bearing seats 32. More specifically, the rotating shafts 31 are located on one side of the centers of the upper and lower ends of the flow stabilizing plate 30. When there is fluid flowing through the oil pipe 19, when the liquid passes through the channel 29, the flow stabilizing plate 30 swings in the fluid, making the fluid flow more stably.

[0036] When the device works, first, the inner cylinder 7 is fixed in the communicating pipe 2 through the fixing bolts 24. When the connecting cylinder 11 is inserted into the inner end of the inner cylinder 7, since the outer end of the moving rubber ring 18 contacts the inner wall of the inner cylinder 7, when the connecting cylinder 11 is pushed towards the inner end of the inner cylinder 7, the moving rubber ring 18 will move towards the side of the frustum ring 17 and contact the outer wall of the frustum ring 17. The frustum ring 17 pushes the moving rubber ring 18 outwards, making the outer wall of the moving rubber ring 18 contact the inner wall of the inner cylinder 7 more tightly, enhancing the sealing effect. One end of the long bolt 25 passes through the first flange 3, the second flange 6 and the first sealing ring 4, and then a nut is screwed on. Then it passes through the second sealing ring 21, the fourth flange 20, and after passing through the second sealing ring 21, another nut is screwed on, and the two nuts are screwed tightly in sequence, thereby fixing the connecting cylinder 11 and the oil pipe 19.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conveniently connected and fixed oil pipe plug valve, comprising: The valve body (1) is characterized in that: the left and right ends of the valve body (1) are symmetrically fixedly connected with connecting pipes (2), the outer ends of the connecting pipes (2) are fixedly installed with flanges (3), the inner ends of each connecting pipe (2) are plugged with inner tubes (7), the outer ends of the inner tubes (7) are fixedly installed with flanges (6), and the flanges (6) are fixedly connected to the flanges (3) by fixing bolts (24); A fixing ring (10) is fixedly mounted on the inner end of the inner tube (7), a rubber ring (9) is fixedly mounted on the outer end of the fixing ring (10), and the outer end of the rubber ring (9) is in close contact with the inner wall of the connecting tube (2); The inner end of the inner tube (7) is plugged with a connecting tube (11), the inner end of the connecting tube (11) is in close contact with the inner end side wall of the rubber ring (9), a sealing component is fixedly installed on the outer wall of the connecting tube (11), and a flange plate three (12) is fixedly installed on the outer end of the connecting tube (11), and the flange plate three (12) is fixedly connected to the flange plate four (20) at one end of the oil pipe (19) and the flange plate one (3) and the flange plate two (6) through long bolts (25).

2. The oil pipe plug valve conveniently connected and fixed according to claim 1, characterized in that: The cross-sections of the fixing ring (10) and the inner cylinder (7) are T-shaped, the rubber ring (9) is L-shaped, one end of the rubber ring (9) is fixedly mounted with a limiting ring (8), the limiting ring (8) is made of metal, the limiting ring (8) and the rubber ring (9) are sleeved on the outer end of the fixing ring (10), and the outer end of the rubber ring (9) contacts the inner wall of the connecting pipe (2), and the lower end of the rubber ring (9) is provided with a guide slope (26).

3. The oil pipe plug valve that is convenient to connect and fix according to claim 1 is characterized by: A sealing cylinder (5) is arranged on the outer side between the inner cylinder (7) and the connecting pipe (2). The sealing cylinder (5) is made of rubber. The inner end of the sealing cylinder (5) is in close contact with the outer wall of the inner cylinder (7). The outer end of the sealing cylinder (5) is in close contact with the inner wall of the connecting pipe (2). A sealing ring 1 (4) is fixedly installed on the outer end of the sealing cylinder (5). The sealing ring 1 (4) is located between the flange 1 (3) and the flange 2 (6) and is fixedly connected by fixing bolts (24).

4. The oil pipe plug valve conveniently connected and fixed according to claim 1, characterized in that: The outer side of the inner end of the connecting tube (11) is provided with a guide slope (13). When the flange (6) is fixed to the outer end of the flange (3) by means of fixing bolts (24), the inner end of the inner tube (7) is inserted into the inner side of the rubber ring (9) through the guide slope (13) and the extruded rubber ring (9).

5. The oil pipe plug valve conveniently connected and fixed according to claim 1, characterized in that: The sealing component comprises a second limiting ring (14), a third limiting ring (16), a truncated cone ring (17) and a movable rubber ring (18); the second limiting ring (14) is fixedly mounted on the outer wall of the inner end of the connecting tube (11); a circular ring (15) is fixedly mounted on the inner side of the second limiting ring (14); and the outer end of the circular ring (15) can abut against the inner side of the fixing ring (10).

6. The oil pipe plug valve that is convenient to connect and fix according to claim 5, characterized in that: The limiting ring (16) is fixedly mounted on the outer wall of the outer end of the connecting tube (11); the truncated cone ring (17) is fixedly sleeved on the outer wall of the connecting tube (11); the movable rubber ring (18) is slidably sleeved on the outer wall of the connecting tube (11); the truncated cone ring (17) is located between the limiting ring (16) and the movable rubber ring (18); the inner end of the movable rubber ring (18) can contact the outer wall of the truncated cone ring (17); and the outer wall of the movable rubber ring (18) contacts the inner wall of the inner tube (7).

7. The oil pipe plug valve that is convenient to connect and fix according to claim 1, characterized in that: A plurality of through holes (23) are evenly formed on the side walls of the flange plate 1 (3), the flange plate 2 (6) and the sealing ring 1 (4), and one end of the fixing bolt (24) passes through the through hole 2 (23) and is threadedly connected with a nut.

8. The oil pipe plug valve that is convenient to connect and fix according to claim 1, characterized in that: The flange plate four (20) is fixedly mounted on a side wall of one end of the oil pipe (19), and a sealing ring two (21) is fixedly mounted on the outer end of the flange plate four (20).

9. The oil pipe plug valve conveniently connected and fixed according to claim 1, characterized in that: A plurality of through holes (22) are evenly formed on the side walls of the flange plate 4 (20), the sealing ring 2 (21), the flange plate 1 (3), the flange plate 2 (6) and the sealing ring 1 (4), and one end of the long bolt (25) passes through the through hole 1 (22) and is threadedly connected with a nut.

10. The oil pipe plug valve conveniently connected and fixed according to claim 1, characterized in that: Two nuts are threadedly connected to the outer wall of each long bolt (25), one of the nuts abuts against the outer wall of flange plate two (6), and the other nut abuts against the outer wall of flange plate four (20).

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