Gas production wellhead sealing device

Abstract

The utility model relates to the technical field of gas production, in particular to a gas production wellhead sealing device which comprises a base, L-shaped connecting plates, a metal connecting pipe, a rubber pipe and a mounting table, the L-shaped connecting plates are arranged at the two ends of the top of the base, the metal connecting pipe is arranged between the top ends of the L-shaped connecting plates, a mounting groove is formed in the bottom of the metal connecting pipe, and the rubber pipe is arranged in the mounting groove. A rubber pipe is mounted in the mounting groove; clamping blocks are arranged at the position, close to the bottom, of the periphery of the rubber pipe, arc-shaped grooves are formed in the inner sides of the clamping blocks, a sealing ring is arranged at the position, close to the bottom, of the inner wall of the rubber pipe, a mounting table is arranged at the position, close to the inner edge, of the top of the base, and the mounting table is composed of a strip-shaped block, a transverse plate, a screw rod, a screw block, a displacement plate and the clamping blocks. And an active pressing structure for the sealing ring is arranged at the joint of the sealing ring and the pipeline, so that the fitting effect is good when the sealing ring is connected with the pipeline, and the sealing reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production, in particular to a gas production wellhead sealing device. Background Art

[0002] The gas wellhead sealing device is a device used to seal and control the wellhead during the natural gas collection process. During the natural gas collection process, the wellhead is the channel for natural gas to enter the surface from the underground reservoir, and its sealing and safety must be ensured to prevent natural gas leakage or other accidents.

[0003] Previous sealing devices only seal the pipe joints through sealing rings at the joints, but the sealing rings do not have an active compression structure, and the fit between the pipes is not good enough, resulting in poor reliability during sealing. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a gas wellhead sealing device, which has an active compression structure for the sealing ring at the connection with the pipeline, has a good fitting effect when connected with the pipeline, and improves the reliability of sealing.

[0005] The technical solution adopted by the utility model to solve the technical problem is a gas wellhead sealing device, comprising a base, an L-shaped connecting plate, a metal connecting pipe, a rubber pipe and a mounting platform, wherein both ends of the top of the base are provided with L-shaped connecting plates, a metal connecting pipe is provided between the tops of the L-shaped connecting plates, a mounting groove is provided at the bottom of the metal connecting pipe, and a rubber pipe is installed in the mounting groove;

[0006] A clamping block is provided at the periphery of the rubber tube near the bottom, an arc groove is provided on the inner side of the clamping block, a sealing ring is provided at the inner wall of the rubber tube near the bottom, a mounting platform is provided at the top of the base near the inner edge, the mounting platform is composed of a strip block, a cross plate, a screw rod, a wire block, a displacement plate and a clamping block, a cross plate is connected between the ends of the strip blocks, a fixing plate is provided at the top of the cross plate near the center, a bearing is provided at one end of the fixing plate, a screw rod is sleeved in the bearing, a wire block is provided at the periphery of the screw rod, a displacement plate is connected to the top of the wire block, an extension wing plate is welded on one side of the bottom end of the clamping block, and the bottom of the extension wing plate is connected to the corresponding displacement plate by bolts.

[0007] By adopting the above technical scheme, the device is arranged on the outside of the top of the gas production pipeline, and the rubber tube is located on the outside of the top of the gas production pipeline. When personnel apply external force to the screw rod, it is convenient to drive the screw block to move horizontally, and then drive the displacement plate, the extension wing plate and the clamping block to move horizontally. The clamping block and the arc groove are moved horizontally, which makes it convenient to apply external force to the bottom end of the rubber tube, so that the sealing ring can be used to actively press and fit the top of the gas production pipeline. The sealing device has an active pressing structure for the sealing ring at the connection with the pipeline, and the fitting effect when connected with the pipeline is good, which improves the reliability of sealing.

[0008] Specifically, T-shaped blocks are arranged on both sides of the bottom end of the wire block, guide grooves are opened on the inner sides of the strip blocks, and the ends of the T-shaped blocks are located in the corresponding guide grooves.

[0009] By adopting the above technical solution, the displacement plate can have a better stability effect when moving horizontally through the limiting and guiding effect of the guide groove on the T-shaped block.

[0010] Specifically, connecting columns are provided at both ends of the bottom of the displacement plate, a sliding block is connected to the bottom of the connecting column, a sliding groove is provided on the top of the strip block, and the bottom end of the sliding block is located in the sliding groove.

[0011] Specifically, a rotating disk is connected to one end of the screw rod away from the bearing, and a rotating handle is welded to one side of the rotating disk near the edge.

[0012] Specifically, an extension block is arranged on the periphery of the top end of the metal connecting pipe, and a second mounting hole is opened through the top of the extension block.

[0013] Specifically, a first mounting hole is formed through the bottom of the base near the edge.

[0014] By adopting the above technical solution, the base can be conveniently installed on the external mounting surface by passing the external screw through the first mounting hole, thereby fixing the sealing device.

[0015] Beneficial effects of the utility model:

[0016] (1) The utility model discloses a gas wellhead sealing device. When an external force is applied to the screw rod, the device can conveniently drive the screw block to move horizontally, thereby driving the clamping block to move horizontally. The clamping block and the arc groove can move horizontally, so that an external force can be applied to the bottom end of the rubber tube. The sealing ring can be used to actively press and fit the top end of the gas production pipeline. The sealing device has an active pressing structure for the sealing ring at the connection with the pipeline, and the fitting effect when connected with the pipeline is good, thereby improving the reliability of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the base, L-shaped connecting plate, metal connecting pipe and rubber pipe of the utility model;

[0020] Figure 3 It is a schematic diagram of the detailed structure of the mounting platform of the utility model.

[0021] In the figure: 1. base; 2. first mounting hole; 3. L-shaped connecting plate; 4. metal connecting pipe; 5. extension block; 6. second mounting hole; 7. rubber tube; 8. mounting table; 9. mounting groove; 10. strip block; 11. horizontal plate; 12. fixed plate; 13. bearing; 14. screw rod; 15. screw block; 16. rotating disk; 17. rotating handle; 18. T-shaped block; 19. guide groove; 20. slider; 21. slide groove; 22. connecting column; 23. displacement plate; 24. clamping block; 25. extension wing plate; 26. arc groove; 27. sealing ring. DETAILED DESCRIPTION

[0022] 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.

[0023] In order to make the connection between the sealing device and the pipeline have an active compression structure for the sealing ring, improve the fitting effect when connected with the pipeline, thereby improving the reliability of the seal, such as Figure 1-3 As shown, a gas wellhead sealing device described in the utility model comprises a base 1, an L-shaped connecting plate 3, a metal connecting pipe 4, a rubber pipe 7 and a mounting platform 8. Both ends of the top of the base 1 are provided with L-shaped connecting plates 3, a metal connecting pipe 4 is provided between the tops of the L-shaped connecting plates 3, a mounting groove 9 is provided at the bottom of the metal connecting pipe 4, and a rubber pipe 7 is installed in the mounting groove 9;

[0024] A clamping block 24 is provided near the bottom of the outer periphery of the rubber tube 7, and an arc groove 26 is provided on the inner side of the clamping block 24. A sealing ring 27 is provided near the bottom of the inner wall of the rubber tube 7. A mounting platform 8 is provided near the inner edge of the top of the base 1, and the mounting platform 8 is composed of a strip block 10, a cross plate 11, a screw rod 14, a wire block 15, a displacement plate 23 and a clamping block 24. A cross plate 11 is connected between the ends of the strip blocks 10, and a fixing plate 12 is provided near the center of the top of the cross plate 11. A bearing 13 is provided at one end of the fixing plate 12, and a screw rod 14 is sleeved in the bearing 13. A wire block 15 is provided around the screw rod 14, and a displacement plate 23 is connected to the top of the wire block 15. An extension wing plate 25 is welded to one side of the bottom end of the clamping block 24, and the bottom of the extension wing plate 25 is connected to the corresponding displacement plate 23 by bolts.

[0025] When in use, the device is arranged on the outside of the top of the gas production pipeline, and the rubber tube 7 is located on the outside of the top of the gas production pipeline. When personnel apply external force to the screw rod 14, it is convenient to drive the screw block 15 to move horizontally, and then drive the displacement plate 23, the extension wing plate 25 and the clamping block 24 to move horizontally. The clamping block 24 and the arc groove 26 move horizontally, which makes it convenient to apply external force to the bottom end of the rubber tube 7, so that the sealing ring 27 can be used to actively press and fit the top of the gas production pipeline. The sealing device has an active pressing structure for the sealing ring at the connection with the pipeline, and the fitting effect when connected with the pipeline is good, which improves the reliability of sealing.

[0026] For example, Figure 3 As shown, the utility model also includes that T-shaped blocks 18 are arranged on both sides of the bottom end of the wire block 15, and guide grooves 19 are opened on the inner sides of the strip blocks 10, and the ends of the T-shaped blocks 18 are located in the corresponding guide grooves 19.

[0027] When in use, the guide groove 19 provides a limiting and guiding effect on the T-shaped block 18 , so that the displacement plate 23 can have a better stability effect when moving horizontally.

[0028] For example, Figure 3 As shown, the utility model also includes that connecting columns 22 are provided at both ends of the bottom of the displacement plate 23, the bottom of the connecting column 22 is connected to a slider 20, the top of the strip block 10 is provided with a slide groove 21, and the bottom end of the slider 20 is located in the slide groove 21.

[0029] When in use, the limiting and guiding effect of the slide groove 21 on the slider 20 can make the displacement plate 23 more stable during horizontal movement.

[0030] For example, Figure 3As shown, the utility model also includes that a rotating disk 16 is connected to one end of the screw rod 14 away from the bearing 13 , and a rotating handle 17 is welded to one side of the rotating disk 16 near the edge.

[0031] When in use, a person applies an external force to the rotating handle 17 to drive the rotating disk 16 to rotate, thereby causing the screw rod 14 to rotate.

[0032] For example, Figure 1-2 As shown, the utility model further includes that an extension block 5 is arranged at the periphery of the top end of the metal connecting pipe 4 , and a second mounting hole 6 is opened through the top of the extension block 5 .

[0033] When in use, the metal connecting pipe 4 is conveniently connected to the flange of the external pipeline by passing the external bolt through the second mounting hole 6.

[0034] For example, Figure 1-2 As shown, the utility model also includes that a first mounting hole 2 is formed through the bottom of the base 1 near the edge.

[0035] When in use, the base 1 is conveniently installed on the external surface to be installed by passing the external screw through the first installation hole 2, so as to fix the sealing device.

[0036] When the utility model is in use, the device is arranged outside the top of the gas production pipeline, and the rubber tube 7 is pre-set outside the top of the gas production pipeline, and the external bolt passes through the second mounting hole 6 to facilitate the connection between the metal connecting tube 4 and the flange of the external pipeline;

[0037] When personnel apply external force to the screw rod 14, it is convenient to drive the screw block 15 to move horizontally, and then drive the displacement plate 23, the extension wing plate 25 and the clamping block 24 to move horizontally. The clamping block 24 and the arc groove 26 move horizontally, which makes it convenient to apply external force to the bottom end of the rubber tube 7, so that the sealing ring 27 can be used to actively press and fit the top of the gas production pipeline. The sealing device has an active pressing structure for the sealing ring at the connection with the pipeline, and the fitting effect when connected with the pipeline is good, which improves the reliability of the seal.

[0038] The above shows and describes the basic principles, main features and 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 in the specification are only to illustrate the principles 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 protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gas wellhead sealing device, characterized in that: The invention comprises a base (1), an L-shaped connecting plate (3), a metal connecting pipe (4), a rubber pipe (7) and a mounting platform (8); the base (1) is provided with L-shaped connecting plates (3) at both ends of the top; a metal connecting pipe (4) is provided between the top ends of the L-shaped connecting plates (3); a mounting groove (9) is provided at the bottom of the metal connecting pipe (4); and a rubber pipe (7) is installed in the mounting groove (9); A clamping block (24) is arranged near the bottom of the outer periphery of the rubber tube (7), and an arc groove (26) is provided inside the clamping block (24). A sealing ring (27) is arranged near the bottom of the inner wall of the rubber tube (7). A mounting platform (8) is arranged near the inner edge of the top of the base (1), and the mounting platform (8) is composed of a strip block (10), a transverse plate (11), a screw rod (14), a screw block (15), a displacement plate (23) and a clamping block (24). The ends of the strip block (10) are connected to each other. A horizontal plate (11) is connected, a fixing plate (12) is arranged near the center of the top of the horizontal plate (11), a bearing (13) is arranged at one end of the fixing plate (12), a screw rod (14) is sleeved in the bearing (13), a screw block (15) is arranged on the periphery of the screw rod (14), a displacement plate (23) is connected to the top of the screw block (15), an extension wing plate (25) is welded to one side of the bottom end of the clamping block (24), and the bottom of the extension wing plate (25) is connected to the corresponding displacement plate (23) by bolts.

2. A gas wellhead sealing device according to claim 1, characterized in that: T-shaped blocks (18) are arranged on both sides of the bottom end of the wire block (15), guide grooves (19) are opened on the inner sides of the strip blocks (10), and the ends of the T-shaped blocks (18) are located in the corresponding guide grooves (19).

3. A gas wellhead sealing device according to claim 1, characterized in that: Both ends of the bottom of the displacement plate (23) are provided with connecting columns (22), the bottom of the connecting column (22) is connected to a slider (20), the top of the strip block (10) is provided with a slide groove (21), and the bottom end of the slider (20) is located in the slide groove (21).

4. A gas wellhead sealing device according to claim 1, characterized in that: The end of the screw rod (14) away from the bearing (13) is connected to a rotating disk (16), and a rotating handle (17) is welded to one side of the rotating disk (16) near the edge.

5. A gas wellhead sealing device according to claim 1, characterized in that: An extension block (5) is arranged on the periphery of the top end of the metal connecting pipe (4), and a second mounting hole (6) is provided through the top of the extension block (5).

6. A gas wellhead sealing device according to claim 1, characterized in that: A first mounting hole (2) is formed through the bottom of the base (1) near the edge.

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