A leak-proof sealing joint for a natural gas pipeline

Abstract

The utility model relates to natural gas pipeline joint technical field especially relates to a natural gas pipeline leakproof sealing joint, including fixed joint group, fixed joint group right side is provided with movable joint group, fixed joint group includes equipment connection pipe, equipment connection pipe surface is connected with hexagonal cap A, movable joint group includes hose joint, hose joint left side is connected with internal thread pipe. The utility model discloses through being inserted in equipment connection pipe right side in inner rubber ring, when internal thread pipe is butt -joined with equipment connection pipe, extrude inner rubber ring, guarantee the butt -joint compactness between internal thread pipe and equipment connection pipe, at the same time, inner lining pipe is inserted in equipment connection pipe directly through inner rubber ring, and inner rubber ring is pressed and can be deformed and closed between equipment connection pipe and internal thread pipe, guarantee the butt -joint sealing property of internal thread pipe and equipment connection pipe, and the built -in inner rubber ring can effectively reduce the influence because of the outside world erosion, reduce the probability of inner rubber ring ageing rupture.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pipeline joint technology, and in particular to a leak-proof sealing joint for natural gas pipelines. Background Technology

[0002] Natural gas, as a clean and efficient energy source, has been widely used around the world. Natural gas pipelines are the main way to transport natural gas, and their safety and reliability are directly related to the stability of energy supply and public safety. Once a leak occurs, it will not only cause energy waste, but may also cause serious accidents such as fires and explosions.

[0003] Currently, most natural gas pipelines are reinforced with special tape to strengthen weak areas. However, this tape is susceptible to external corrosion during use. Over long-term use, due to material aging and environmental factors, it can crack and leak, leading to natural gas leaks and posing a safety hazard to the normal operation of the equipment. Therefore, a leak-proof sealing joint for natural gas pipelines is needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A leak-proof sealing joint for natural gas pipelines includes a fixed joint assembly and a movable joint assembly on the right side of the fixed joint assembly. The fixed joint assembly includes an equipment pipe with a hexagonal cap A attached to its surface. The movable joint assembly includes a hose connector with an internally threaded pipe connected to its left side, and the internally threaded pipe is threadedly connected to the right side of the equipment pipe. A hexagonal cap B is attached to the surface of the hose connector, and a reinforcing accessory is provided at the bottom left side of the internally threaded pipe.

[0007] Preferably, the reinforcing accessory includes an inner rubber ring, which is embedded in the right side of the equipment connector. The inner rubber ring has multiple annular shrinkage grooves on its surface. The multiple annular shrinkage grooves on the right side of the inner rubber ring facilitate the compression of the inner rubber ring during the extrusion of the internally threaded pipe.

[0008] Preferably, a limiting ring is connected to the right side of the inner wall of the equipment connector, and the limiting ring is fitted into the surface of the inner rubber ring through an annular groove. The limiting ring on the inner wall of the equipment connector can be snapped back into the annular groove on the surface of the inner rubber ring, which facilitates the installation of the inner rubber ring.

[0009] Preferably, a torsion sleeve is fastened to the right side of the hexagonal cap B, and a through hole adapted to the hose connector is opened on the right side of the torsion sleeve. By twisting the torsion sleeve, the rotation of the hexagonal cap B can be controlled, so that the hexagonal cap B drives the internal threaded pipe to be threadedly connected with the equipment connector.

[0010] Preferably, the inner wall of the internally threaded tube is connected to an inner liner tube, and the inner liner tube penetrates the inside of the inner rubber ring. By passing through the inner rubber ring, the inner liner tube can be easily inserted directly into the equipment connecting pipe.

[0011] Preferably, a fixing pipe is connected to the bottom left side of the internally threaded pipe. A cover ring is movably connected to one side of the fixing pipe, and the other side of the cover ring is connected and fixed to the other side of the fixing pipe by a bolt group. The fixing pipe and the cover ring can be fixed on the surface of the equipment connecting pipe, thereby reinforcing the connection between the internally threaded pipe and the equipment connecting pipe.

[0012] Preferably, the surface of the equipment connector is connected to two limiting rings, and the inner wall of the fixing tube and the cover ring is provided with a rubber ring, which is attached to the inner wall of the limiting ring. When the fixing tube and the cover ring are fastened to the surface of the equipment connector, the limiting ring and the rubber ring are attached and limited, increasing the friction between the cover ring and the fixing tube on the surface of the equipment connector.

[0013] This utility model has at least the following beneficial effects:

[0014] 1. By setting up fixed joint groups and movable joint groups, the sealing effect of the connection between the equipment pipe and the fixed pipe is improved. Compared with the traditional structure, this device inserts an inner rubber ring on the right side of the equipment pipe. When the internal threaded pipe is connected to the equipment pipe, the inner rubber ring is squeezed to ensure the tightness of the connection between the internal threaded pipe and the equipment pipe. At the same time, the inner liner tube passes through the inner rubber ring and is inserted directly into the equipment pipe. The inner rubber ring can deform and seal between the equipment pipe and the internal threaded pipe under pressure, ensuring the sealing performance of the connection between the internal threaded pipe and the equipment pipe. The built-in inner rubber ring can effectively reduce the impact of external corrosion and reduce the probability of aging and cracking of the inner rubber ring.

[0015] 2. By setting up reinforcing accessories, the connection between the equipment connector and the internal threaded pipe is reinforced. This device uses a fixed pipe to fit against the bottom surface of the equipment connector. By rotating the cover ring, it can be fastened to the surface of the equipment connector and fixed with bolts, thereby reinforcing the connection between the equipment connector and the cover ring. The cover ring and the fixed pipe cooperate to form a cover at the joint, which can improve the anti-corrosion effect of the inner rubber ring and ensure the normal service life of the inner rubber ring. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the external structure of a leak-proof sealing joint for natural gas pipelines proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the external disassembly structure of a natural gas pipeline leak-proof sealing joint proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal cross-sectional structure of a natural gas pipeline leak-proof sealing joint proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the closed state structure of the fixed pipe and the cover ring in a natural gas pipeline anti-leakage sealing joint proposed in this utility model.

[0021] In the diagram: 1. Fixed connector assembly; 11. Equipment connecting pipe; 12. Hexagonal cap A; 13. Limiting ring; 14. Limiting ring; 2. Movable connector assembly; 21. Hose connector; 22. Hexagonal cap B; 23. Internally threaded pipe; 24. Inner liner pipe; 25. Torque sleeve; 3. Reinforcing accessories; 31. Fixed pipe; 32. Cover ring; 33. Bolt assembly; 34. Inner rubber ring; 35. Rubber ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Reference Figure 1-4 A leak-proof sealing joint for natural gas pipelines includes a fixed joint assembly 1, a movable joint assembly 2 on the right side of the fixed joint assembly 1, the fixed joint assembly 1 including an equipment pipe 11, a hexagonal cap A12 connected to the surface of the equipment pipe 11, the movable joint assembly 2 including a hose connector 21, an internally threaded pipe 23 connected to the left side of the hose connector 21, and the internally threaded pipe 23 threadedly mating with the right side of the equipment pipe 11, a hexagonal cap B22 connected to the surface of the hose connector 21, and a reinforcing accessory 3 provided at the bottom left side of the internally threaded pipe 23.

[0024] The reinforcing accessory 3 includes an inner rubber ring 34, which is embedded in the right side of the equipment connector 11. The inner rubber ring 34 has multiple annular shrinkage grooves on its surface.

[0025] A limiting ring 14 is connected to the right side of the inner wall of the equipment connector 11, and the limiting ring 14 is fitted into the surface of the inner rubber ring 34 through an annular groove.

[0026] The right side of the hexagonal cap B22 is fitted with a twist sleeve 25, and the right side of the twist sleeve 25 has a through hole that is compatible with the hose connector 21.

[0027] The inner wall of the internally threaded tube 23 is connected to an inner liner tube 24, and the inner liner tube 24 penetrates the interior of the inner rubber ring 34.

[0028] The bottom left end of the internally threaded tube 23 is connected to a fixed tube 31. One side of the fixed tube 31 is movably connected to a cover ring 32, and the other side of the cover ring 32 is connected and fixed to the other side of the fixed tube 31 by a bolt group 33.

[0029] Two limiting rings 13 are connected to the surface of the equipment connecting pipe 11. The inner wall of the fixing pipe 31 and the cover ring 32 is provided with a rubber ring 35, and the rubber ring 35 is attached to the inner wall of the limiting ring 14.

[0030] The multiple annular shrinkage grooves on the right side of the inner rubber ring 34 facilitate the compression of the inner rubber ring 34 under the extrusion of the internal threaded tube 23, allowing the inner rubber ring 34 to fill the gaps under pressure, further improving the sealing effect between the internal threaded tube 23 and the equipment connector 11. When installing the inner rubber ring 34, it is inserted into the right side of the equipment connector 11, and the limiting ring 14 on the inner wall of the equipment connector 11 can be snapped back into the annular groove on the surface of the inner rubber ring 34, making it convenient to install the inner rubber ring 34.

[0031] The twist sleeve 25 is designed to be movable and detachable. By moving the twist sleeve 25 on the surface of the hose connector 21, the twist sleeve 25 can be fitted onto the surface of the hexagonal cap B22. By twisting the twist sleeve 25, the rotation of the hexagonal cap B22 can be controlled, so that the hexagonal cap B22 drives the threaded pipe 23 to be threadedly connected with the equipment connection pipe 11. The inner liner 24 passes through the inner rubber ring 34, so that the inner liner 24 can be directly inserted into the equipment connection pipe 11. This allows the inner liner 24 to support and resist the inner wall of the inner rubber ring 34, so that natural gas can be directly guided to the equipment connection pipe 11 for transportation.

[0032] After the internal threaded tube 23 is threadedly connected to the equipment connector 11, the fixing tube 31 and the cover ring 32 cooperate to fix it on the surface of the equipment connector 11, thereby reinforcing the connection between the internal threaded tube 23 and the equipment connector 11. When the fixing tube 31 and the cover ring 32 are fastened to the surface of the equipment connector 11, the limiting ring 13 and the rubber ring 35 fit together to limit the movement, increasing the friction between the cover ring 32 and the fixing tube 31 fastened to the surface of the equipment connector 11, reducing the probability of the fixing tube 31 and the cover ring 32 moving and sliding, and ensuring the stability of the connection between the internal threaded tube 23 and the equipment connector 11.

[0033] Working principle: According to the appendix Figure 2 With appendix Figure 3As shown, when the natural gas pipeline is connected, the inner rubber ring 34 is inserted on the right side of the equipment connector 11, so that the fixing pipe 31 is fastened to the surface of the equipment connector 11. At this time, the twist sleeve 25 is turned, and the twist sleeve 25 can move on the surface of the hose connector 21, so that the twist sleeve 25 is fastened to the surface of the hexagonal cap B22 and twisted. The hexagonal cap B22 can drive the internal threaded pipe 23 to rotate and move on the right side surface of the equipment connector 11. During the movement of the internal threaded pipe 23, pressure can be applied to the inner rubber ring 34. At the same time, the internal threaded pipe 23 can drive the inner liner pipe 24 to move, so that the inner liner pipe 24 passes through the inner rubber ring 34 and is directly inserted into the equipment connector 11. As the internal threaded pipe 23 moves on the right side of the equipment connector 11, the rubber ring 35 can be driven to abut against and adhere to the end face of the limiting ring 13.

[0034] Secondly, according to the appendix Figure 2 With appendix Figure 3 As shown, rotating the cover ring 32 causes the rubber ring 35 to adhere to the surface of the equipment connector 11. After the cover ring 32 and the fixed pipe 31 are molded together, they are locked and fixed on the side by bolt group 33. The cooperation between the fixed pipe 31 and the cover ring 32 strengthens the connection of the internal threaded pipe 23 on the surface of the equipment connector 11, effectively reducing the chance of the internal threaded pipe 23 rotating and loosening.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing joint for natural gas pipelines, comprising a fixed joint assembly (1), wherein a movable joint assembly (2) is provided on the right side of the fixed joint assembly (1), and the fixed joint assembly (1) includes an equipment connecting pipe (11), characterized in that, The surface of the equipment connector (11) is connected to a hexagonal cap A (12). The movable connector group (2) includes a hose connector (21). The left side of the hose connector (21) is connected to an internally threaded pipe (23), and the internally threaded pipe (23) is threadedly connected to the right side of the equipment connector (11). The surface of the hose connector (21) is connected to a hexagonal cap B (22). A reinforcing accessory (3) is provided at the bottom left side of the internally threaded pipe (23).

2. The leak-proof sealing joint for natural gas pipelines according to claim 1, characterized in that, The reinforcing accessory (3) includes an inner rubber ring (34), which is embedded in the right side of the equipment connector (11), and the surface of the inner rubber ring (34) is provided with multiple annular shrinkage grooves.

3. A leak-proof sealing joint for natural gas pipelines according to claim 2, characterized in that, The right side of the inner wall of the equipment connector (11) is connected to a limiting ring (14), and the limiting ring (14) is fitted into the surface of the inner rubber ring (34) through an annular groove.

4. A leak-proof sealing joint for natural gas pipelines according to claim 1, characterized in that, The right side of the hexagonal cap B (22) is fitted with a twist sleeve (25), and the right side of the twist sleeve (25) has a through hole that is compatible with the hose connector (21).

5. A leak-proof sealing joint for natural gas pipelines according to claim 1, characterized in that, The inner wall of the internally threaded tube (23) is connected to an inner liner tube (24), and the inner liner tube (24) penetrates the interior of the inner rubber ring (34).

6. A leak-proof sealing joint for natural gas pipelines according to claim 5, characterized in that, The bottom left end of the internally threaded tube (23) is connected to a fixed tube (31). One side of the fixed tube (31) is movably connected to a cover ring (32), and the other side of the cover ring (32) is connected and fixed to the other side of the fixed tube (31) by a bolt group (33).

7. A leak-proof sealing joint for natural gas pipelines according to claim 6, characterized in that, The surface of the equipment connector (11) is connected to two limiting rings (13), and the inner wall of the fixing tube (31) and the cover ring (32) is provided with a rubber ring (35), and the rubber ring (35) is attached to the inner wall of the limiting ring (14).

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