Connecting pipe stable in connection

Abstract

The utility model relates to the technical field of gas extraction pipes, and discloses a connecting pipe stable in connection, which comprises a pipeline and a pipe sleeve, thin-section external threads are fixedly arranged on the outer surface of the thin section of the pipeline, thin-section internal threads are fixedly arranged on the inner surface of the thin section of the pipeline, and the thin-section internal threads are fixedly arranged on the inner surface of the thin section of the pipeline. Thick-section external threads are fixedly arranged on the outer surface of the thicker section of the pipeline, thick-section internal threads are fixedly arranged on the inner surface of the thicker section of the pipeline, a thin-end gasket is fixedly arranged at the end of the thinner section of the pipeline, and a thick-end gasket is fixedly arranged at the end of the thicker section of the pipeline. According to the connecting pipe, the pipeline and the casing pipe are connected in a threaded and sleeved mode, the casing pipe is fastened at the connecting position through the hoop, the pipe wall is of a multi-layer composite structure, stability and safety of the pipeline are guaranteed from the two aspects of the structure and the material, the threaded and sleeved mode and the hoop fastening mode are simple and easy to operate, and the connected pipeline is free of a large number of protrusions and basically kept flat. And arrangement in a drill hole is facilitated, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas extraction pipes, in particular to a connecting pipe with stable connection. Background Art

[0002] Gas extraction pipes are pipes installed in boreholes in coal mines for gas extraction. Due to the limited space in underground tunnels, they are often connected in short sections. The existing technology often uses end flanges for connection. The protruding flanges occupy a large space, making it difficult for the pipe to move smoothly in the borehole, seriously affecting the operation efficiency.

[0003] After searching, the existing patent (publication number: CN211821136U) discloses a "gas extraction pipe section comprising a plurality of gas extraction pipe sections connected end to end in sequence, any gas extraction pipe section comprising a pipe body, one end of the pipe body is concentrically connected to a tubular connecting short section, the outer diameter of the connecting short section corresponds to the inner diameter of the pipe body, a plurality of first assembly holes are circumferentially spaced apart on the connecting short section: the other end of the pipe body is circumferentially spaced apart to form a plurality of second assembly holes, the second assembly holes can be fastened and matched with the first assembly holes on another gas extraction pipe section at an adjacent position through fasteners, so as to fix the two adjacent gas extraction pipe sections. The utility model can solve the problem that conventional large-diameter gas extraction pipes are time-consuming and labor-intensive to connect and are difficult to be inserted into the hole after installation."

[0004] Although this patented technology provides a quickly connectable gas extraction pipe by quickly connecting the gas extraction pipe section through assembly holes and fasteners, there is a problem that the connection is only simply inserted and fastened with fasteners, and the connection is not strengthened, resulting in general strength of the connection, and it is difficult to guarantee the life and safety after long-term use. Therefore, those skilled in the art provide a connecting pipe with a stable connection to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art that the pipeline is simply inserted into the connection and fastened with fasteners, and the long-term use safety and service life are difficult to ensure. A connecting pipe with stable connection is proposed. The connecting pipe is threadedly sleeved between the pipeline and the casing. The casing is fastened at the connection with a clamp. The pipe wall uses a multi-layer composite structure to ensure the stability and safety of the pipeline from both structural and material aspects. The threaded sleeve and clamp fastening methods are simple and easy to operate. The connected pipeline has no large number of protrusions and is basically kept flat, which is convenient for arrangement in a drilled hole and improves working efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A connecting pipe with stable connection comprises a pipe and a pipe sleeve, wherein a thin section of the pipe is fixedly provided with a thin section external thread on the outer surface, a thin section of the pipe is fixedly provided with a thin section internal thread on the inner surface, a thick section of the pipe is fixedly provided with a thick section external thread on the outer surface, a thick section of the pipe is fixedly provided with a thick section internal thread on the inner surface, a thin end gasket is fixedly provided at the end of the thin section of the pipe, and a thick end gasket is fixedly provided at the end of the thick section of the pipe;

[0008] The inner surface of the sleeve is fixedly provided with a sleeve internal thread, sleeve mouth washers are fixedly provided at the openings at both ends of the sleeve, a sleeve washer is fixedly provided at the groove on the outer surface of the sleeve, a clamp is clamped on the surface of the sleeve washer, a shaft is hingedly connected between the two clamps, and a bolt is threadedly sleeved at the opening of the clamp;

[0009] Through the above technical scheme, the thin section external thread and thick section external thread on the outer surface of the pipe and the thin section internal thread and thick section internal thread on the inner surface of the pipe, in addition to the basic connection function, play the role of annular reinforcement ribs to a certain extent, increase the local strength and rigidity of the pipe, and disperse the internal pressure of the pipe to a certain extent, reduce stress concentration, and the thin end gasket, thick end gasket and sleeve mouth gasket provide effective sealing by filling the tiny gap between the pipe and the sleeve port to prevent gas leakage when the pressure changes or the pipe expands and contracts due to heat, while absorbing and buffering vibration and impact in the pipeline system, extending the service life of the pipe and accessories. The sleeve is fastened with bolts in conjunction with the clamp and the sleeve gasket. Compared with the traditional welding or flange connection method, it is convenient and simple, saving manpower and time costs.

[0010] Furthermore, the pipe is threadedly sleeved to the internal thread of the sleeve through the thick external thread;

[0011] Through the above technical solution, the pipeline and the pipe sleeve are connected by mechanical means, and have high mechanical strength and durability.

[0012] Furthermore, the other pipe is threadedly sleeved to the thick internal thread of the pipe through the thin external thread, and at the same time, the pipe is threadedly sleeved to the internal thread of the casing through the thick external thread;

[0013] Through the above technical solution, the pipe and the pipe sleeve and another pipe are threadedly connected in pairs in sequence, the pipe itself and another pipe can be directly threadedly connected, and the pipe sleeve is threadedly connected to each of them, providing double protection for the stability and reliability of the connection.

[0014] Further, the clamp is fastened to the sleeve gasket in the groove on the outer surface of the sleeve by bolts;

[0015] Through the above technical solution, the clamps at the pipe connection are tightened, the sealing of the connection parts is increased, additional mechanical support is provided, and the stability and strength of the pipe connection are enhanced.

[0016] Furthermore, the pipe wall of the pipeline adopts a multi-layer composite structure, the outermost layer of the pipe wall is fixedly provided with a pipe wall outer layer, the inner layer of the pipe wall outer layer is fixedly provided with a pipe wall middle layer, the inner layer of the pipe wall middle layer is fixedly provided with a pipe wall inner layer, a pipe wall adhesive layer is fixedly provided between the pipe wall outer layer and the pipe wall middle layer, and a pipe wall adhesive layer is fixedly provided between the pipe wall middle layer and the pipe wall inner layer;

[0017] Through the above technical solution, the pipeline wall adopts a multi-layer composite structure, combining the advantages of different materials, and each layer of material works synergistically to improve the performance and reliability of the pipeline.

[0018] Furthermore, the outer layer of the tube wall is made of polypropylene material, the middle layer of the tube wall is made of stainless steel material, the inner layer of the tube wall is made of high-density polyethylene material, and the adhesive layer of the tube wall is made of polyurethane material;

[0019] Through the above technical scheme, polypropylene material is used as the outer layer of the pipe wall, which has good weather resistance and wear resistance, and can effectively protect the pipeline from the influence of the external environment such as mechanical damage or chemical corrosion. The stainless steel material is used as the middle layer of the pipe wall, which has high strength, high pressure resistance and impact resistance, and provides the main mechanical strength of the pipeline and withstands internal pressure and external stress. The high-density polyethylene material is used as the inner layer of the pipe wall, which provides excellent chemical corrosion resistance and prevents gas from corroding the pipeline. The polyurethane material is used as the adhesive layer of the pipe wall, which has good elasticity and buffering properties, can adapt to thermal expansion and contraction, and provides a certain flexibility to prevent the pipeline from rupture due to stress concentration.

[0020] Furthermore, the thin end gasket, the thick end gasket, the sleeve mouth gasket and the sleeve gasket are made of polytetrafluoroethylene material;

[0021] Through the above technical solution, the polytetrafluoroethylene material has excellent chemical corrosion resistance, effectively preventing gas corrosion to the gasket and extending the service life.

[0022] The utility model has the following beneficial effects:

[0023] 1. The utility model provides a connecting pipe with stable connection. The connecting pipe connects the pipe and the pipe sleeve by threaded sleeve connection and uses a clamp to fasten the connection, which significantly improves the mechanical strength and stability of the connection. The threaded sleeve provides a high-strength mechanical connection, and the clamp fastening further enhances the stability of the connection and helps to disperse stress to prevent damage caused by stress concentration. This structure is not only easy to install, but also can maintain high strength and reliability in long-term use.

[0024] 2. The utility model proposes a connecting pipe with stable connection. The wall of the connecting pipe adopts a multi-layer composite structure. Each layer of material combines the advantages of different materials to improve the overall performance of the pipeline. The outer layer of polypropylene provides weather resistance and wear resistance, the middle layer of stainless steel provides the main mechanical strength and high pressure resistance, the inner layer of high-density polyethylene provides excellent chemical corrosion resistance, and the adhesive layer of polyurethane provides flexibility and buffering performance. This multi-layer structure effectively improves the durability and reliability of the pipeline and adapts to complex and harsh use environments.

[0025] 3. The utility model proposes a stable connection pipe, which uses polytetrafluoroethylene gaskets at each port and joint. These gaskets fill the tiny gaps and provide effective sealing to prevent gas leakage. The chemical corrosion resistance of the PTFE gasket ensures the long life and reliability of the gasket in harsh environments. At the same time, its wide temperature adaptability and anti-aging performance ensure that it can still maintain good sealing performance in high or low temperature environments, ensuring the safety of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an axonometric schematic diagram of a connection pipe with a stable connection proposed by the utility model;

[0027] Figure 2 This is a front view schematic diagram of a connecting pipe with stable connection proposed by the utility model;

[0028] Figure 3 This is a front cross-sectional schematic diagram of a connecting pipe with a stable connection proposed by the utility model;

[0029] Figure 4 The utility model provides a schematic diagram of the pipe wall structure of a connecting pipe with stable connection.

[0030] Legend:

[0031] 1. Pipe; 2. Thin section external thread; 3. Thin section internal thread; 4. Thick section external thread; 5. Thick section internal thread; 6. Thin end washer; 7. Thick end washer; 8. Pipe sleeve; 9. Shaft; 10. Clamp; 11. Bolt; 12. Casing washer; 13. Casing internal thread; 14. Casing mouth washer; 15. Outer layer of pipe wall; 16. Middle layer of pipe wall; 17. Inner layer of pipe wall; 18. Adhesive layer of pipe wall. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1-4 The utility model provides an embodiment: a connecting pipe with stable connection, including a pipe 1 and a pipe sleeve 8, a thin section of the pipe 1 having a thin outer thread 2 fixedly arranged on the outer surface, a thin section of the pipe 1 having a thin inner thread 3 fixedly arranged on the inner surface, a thick section of the pipe 1 having a thick outer thread 4 fixedly arranged on the outer surface, a thick section of the pipe 1 having a thick inner thread 5 fixedly arranged on the inner surface, the pipe 1 can be connected to the thick inner thread 5 of another pipe 1 through the thin outer thread 2, a thin end gasket 6 is fixedly arranged on the end of the thin section of the pipe 1, a thick end gasket 7 is fixedly arranged on the end of the thick section of the pipe 1, the thin end gasket 6 and the thick end gasket 7 effectively buffer the mechanical vibration of the connection of the pipe 1 to ensure good sealing performance;

[0034] The inner surface of the pipe sleeve 8 is fixedly provided with a sleeve internal thread 13, and sleeve mouth washers 14 are fixedly provided at the openings at both ends of the pipe sleeve 8. The pipe 1 is sleeved into the sleeve internal thread 13 of the pipe sleeve 8 through the thick section external thread 4 to maintain a good mechanical connection. A sleeve washer 12 is fixedly provided in the groove on the outer surface of the pipe sleeve 8, and a clamp 10 is clamped on the surface of the sleeve washer 12. A shaft 9 is hingedly connected between the two clamps 10. A bolt 11 is threadedly sleeved at the opening of the clamp 10. The bolt 11 fully tightens the clamp 10. The sleeve washer 12 well disperses the tightening effect of the clamp 10 on the pipe sleeve 8, so that the force at the connection is more uniform. In addition to the basic connection function, the thin section external thread 2 and the thick section external thread 4 on the outer surface of the pipe 1 and the thin section internal thread 3 and the thick section internal thread 5 on the inner surface of the pipe 1 play a ring reinforcement role to a certain extent. The ribs increase the local strength and rigidity of the pipeline 1, disperse the internal pressure of the pipeline 1 to a certain extent, and reduce stress concentration. The thin-end gasket 6, the thick-end gasket 7 and the sleeve mouth gasket 14 provide effective sealing by filling the tiny gap between the ends of the pipeline 1 and the sleeve 8 to prevent gas leakage when the pressure changes or the pipeline 1 expands and contracts due to heat, while absorbing and buffering the vibration and impact in the pipeline 1 system, extending the service life of the pipeline 1 and accessories. The sleeve 8 is fastened with bolts 11 in conjunction with the clamp 10 and the sleeve gasket 12. Compared with traditional welding or flange connection methods, it is convenient and simple, saves manpower and time costs, and provides additional mechanical support, increases the stability, strength and sealing of the connection of the pipeline 1, and helps disperse the stress at the connection of the pipeline 1, reducing the risk of damage caused by stress concentration.

[0035] The pipe 1 is threadedly sleeved to the internal thread 13 of the sleeve 8 through the thick section external thread 4. The pipe 1 and the sleeve 8 are mechanically connected, which has high mechanical strength and durability. Compared with the traditional welding method, it is not only convenient for on-site installation, but also particularly suitable for environments with limited space. It can also be easily disassembled and reassembled during maintenance or replacement without destructive operations, and also avoids the safety risks of high-temperature operations, which is particularly suitable for flammable and explosive environments. Another pipe 1 is threadedly sleeved to the thick section internal thread 5 of the pipe 1 through the thin section external thread 2. At the same time, the pipe 1 is threadedly sleeved to the internal thread 13 of the sleeve through the thick section external thread 4. The pipeline 1 is threadedly sleeved with the pipe sleeve 8 and another pipeline 1 in turn, and higher mechanical strength and durability are obtained through simple mechanical means. The pipeline 1 and another pipeline 1 can be directly threadedly sleeved, and the pipe sleeve 8 is threadedly sleeved with each of them, providing double protection for the stability and reliability of the connection. The clamp 10 is fastened to the sleeve gasket 12 in the groove on the outer surface of the pipe sleeve 8 by bolts 11, and the clamp 10 at the connection of the pipeline 1 is fastened to increase the sealing of the connection part, prevent gas leakage, provide additional mechanical support, enhance the stability and strength of the connection of the pipeline 1, buffer stress changes, and extend the service life of the pipeline 1.

[0036] The pipe wall of the pipeline 1 adopts a multi-layer composite structure, the outermost layer of the pipe wall is fixedly provided with a pipe wall outer layer 15, the inner layer of the pipe wall outer layer 15 is fixedly provided with a pipe wall middle layer 16, the inner layer of the pipe wall middle layer 16 is fixedly provided with a pipe wall inner layer 17, a pipe wall adhesive layer 18 is fixedly provided between the pipe wall outer layer 15 and the pipe wall middle layer 16, and a pipe wall adhesive layer 18 is fixedly provided between the pipe wall middle layer 16 and the pipe wall inner layer 17. The pipe wall of the pipeline 1 adopts a multi-layer composite structure, combining the advantages of different materials, and the synergistic effect of each layer of material to improve the performance and reliability of the pipeline 1, and meet the multiple requirements of high strength, corrosion resistance, wear resistance and good sealing. The pipe wall outer layer 15 is made of polypropylene material, the pipe wall middle layer 16 is made of stainless steel material, the pipe wall inner layer 17 is made of high-density polyethylene material, and the pipe wall adhesive layer 18 is made of Polyurethane material and polypropylene material are used as the outer layer 15 of the pipe wall, which have good weather resistance and wear resistance, and can effectively protect the pipeline 1 from the influence of the external environment such as mechanical damage or chemical corrosion, thereby extending the service life of the pipeline 1. Stainless steel material is used as the middle layer 16 of the pipe wall, which has high strength, high pressure resistance, and impact resistance, and provides the main mechanical strength of the pipeline 1, withstands internal pressure and external stress, and ensures the structural stability of the pipeline 1. High-density polyethylene material is used as the inner layer 17 of the pipe wall, which has high chemical resistance, high temperature resistance, and aging resistance, and provides excellent chemical corrosion resistance to prevent gas from corroding the pipeline 1. Polyurethane material is used as the adhesive layer 18 of the pipe wall, which has good elasticity and buffering properties, can adapt to thermal expansion and contraction, absorb and disperse mechanical stress, provide a certain flexibility, and prevent the pipeline 1 from rupture due to stress concentration.

[0037] The thin end gasket 6, the thick end gasket 7, the sleeve mouth gasket 14 and the sleeve gasket 12 are made of polytetrafluoroethylene material. The polytetrafluoroethylene material has excellent chemical corrosion resistance, effectively prevents gas from corroding the gasket and prolongs the service life. Polytetrafluoroethylene has a wide temperature adaptability range and can still maintain good sealing performance in high or low temperature environments. Polytetrafluoroethylene has excellent anti-aging properties, maintains sealing performance and physical strength during long-term use, is not easy to age and fail, provides long-lasting and stable sealing performance, and ensures the safety and reliability of the gas transportation pipeline 1.

[0038] Working principle: The pipe 1 and the pipe sleeve 8 are connected by threaded sleeves. The thin section external thread 2 and the thick section external thread 4 of the pipe 1 are respectively sleeved to the thick section internal thread 5 of another pipe 1 and the sleeve internal thread 13 of the pipe sleeve 8, providing a stable mechanical connection. The clamp 10 is fastened to the sleeve gasket 12 on the groove on the outer surface of the pipe sleeve 8 by bolts 11 to increase the sealing and strength of the connection. The multi-layer composite pipe wall structure consists of a polypropylene pipe wall outer layer 15, a stainless steel pipe wall middle layer 16, a high-density polyethylene pipe wall inner layer 17 and a polyurethane pipe wall adhesive layer 18. The layers work together to improve the corrosion resistance, wear resistance and pressure resistance of the pipe 1. The thin end gasket 6, the thick end gasket 7, the sleeve gasket 12 and the sleeve mouth gasket 14 are made of polytetrafluoroethylene material, which provides excellent sealing and chemical corrosion resistance, ensuring the long-term stable operation of the pipe 1 in high and low temperature environments. The connecting pipe ensures the high strength, sealing and durability of the pipe 1 through multiple mechanical connections and multi-layer composite material structures.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A connecting pipe with stable connection, comprising a pipe (1) and a pipe sleeve (8), characterized in that: The outer surface of the thinner section of the pipe (1) is fixedly provided with a thin section external thread (2), the inner surface of the thinner section of the pipe (1) is fixedly provided with a thin section internal thread (3), the outer surface of the thicker section of the pipe (1) is fixedly provided with a thick section external thread (4), the inner surface of the thicker section of the pipe (1) is fixedly provided with a thick section internal thread (5), the end of the thinner section of the pipe (1) is fixedly provided with a thin end gasket (6), and the end of the thicker section of the pipe (1) is fixedly provided with a thick end gasket (7); The inner surface of the pipe sleeve (8) is fixedly provided with a sleeve internal thread (13), the openings at both ends of the pipe sleeve (8) are fixedly provided with sleeve mouth washers (14), the groove on the outer surface of the pipe sleeve (8) is fixedly provided with a sleeve washer (12), the surface of the sleeve washer (12) is clamped with a clamp (10), a shaft (9) is hingedly connected between the two clamps (10), and a bolt (11) is threadedly sleeved at the opening of the clamp (10).

2. A connecting pipe with stable connection according to claim 1, characterized in that: The pipeline (1) is threadedly sleeved onto the internal thread (13) of the sleeve (8) via the thick external thread (4).

3. A connecting pipe with stable connection according to claim 1, characterized in that: The other pipe (1) is threadedly sleeved onto the thick internal thread (5) of the pipe (1) via the thin external thread (2), and at the same time, the pipe (1) is threadedly sleeved onto the sleeve internal thread (13) via the thick external thread (4).

4. The connecting pipe with stable connection according to claim 1, characterized in that: The clamp (10) is fastened to a sleeve gasket (12) on a groove on the outer surface of the sleeve (8) by means of bolts (11).

5. The connecting pipe with stable connection according to claim 1, characterized in that: The pipe wall of the pipeline (1) adopts a multi-layer composite structure, wherein an outermost pipe wall layer (15) is fixedly provided, an inner layer of the outer pipe wall layer (15) is fixedly provided with a middle pipe wall layer (16), an inner pipe wall layer (17) is fixedly provided inside the middle pipe wall layer (16), a pipe wall adhesive layer (18) is fixedly provided between the outer pipe wall layer (15) and the middle pipe wall layer (16), and a pipe wall adhesive layer (18) is fixedly provided between the middle pipe wall layer (16) and the inner pipe wall layer (17).

6. A connection pipe with stable connection according to claim 5, characterized in that: The outer layer (15) of the tube wall is made of polypropylene material, the middle layer (16) of the tube wall is made of stainless steel material, the inner layer (17) of the tube wall is made of high-density polyethylene material, and the adhesive layer (18) of the tube wall is made of polyurethane material.

7. The connecting pipe with stable connection according to claim 1, characterized in that: The thin end gasket (6), the thick end gasket (7), the sleeve opening gasket (14) and the sleeve gasket (12) are made of polytetrafluoroethylene material.

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