Self-adjusting pipeline for petroleum and natural gas transportation

Abstract

The invention relates to the technical field of petroleum and natural gas pipelines, in particular to a self-adjusting pipeline for petroleum and natural gas conveying, which comprises a pipeline main body, a mounting seat, a bayonet socket and a connecting plug, and the mounting seat and the connecting plug are coaxially and fixedly mounted on the outer side walls of the two ends of the pipeline main body respectively; a mounting groove is coaxially formed in the end face, away from the connecting plug, of the mounting base, a plurality of fastening bolts are in threaded connection with the end face, close to the connecting plug, of the mounting base, one ends of the fastening bolts extend into the mounting groove, and the connecting plug comprises a connecting part and a deformation part; by arranging the bayonet sockets and the connecting plugs at the outer ends of the pipeline main bodies, the problems that when the pipeline main bodies are installed, the two pipeline main bodies are eccentric or an included angle is formed between the axial leads, and when the pipeline main bodies are used, a foundation of a single pipeline main body settles, so that the pipeline main bodies are eccentric or the axial leads form an included angle are solved; therefore, the sealing performance of the pipeline is ensured.

Description

Technical Field

[0001] This invention relates to the field of oil and gas pipeline technology, specifically to a self-regulating pipeline for oil and gas transportation. Background Technology

[0002] Self-regulating pipelines for oil and gas transportation are a high-safety pipeline technology that uses built-in intelligent sensors and control systems to monitor and automatically adjust for the effects of pipeline misalignment in real time, thereby optimizing transportation efficiency, preventing leaks, and adapting to complex working conditions. During installation or long-term use, the sealing performance of the pipeline is closely related to the connections between the pipeline joints. If the foundation settles or shifts during long-term use, it can lead to uneven stress on the pipeline, loosening of joints, structural deformation, or even rupture, causing media leakage. When transporting oil, gas, or chemicals, this can easily cause environmental pollution, fires, explosions, and other safety accidents. Pipeline leaks can lead to resource waste, energy supply interruptions, and secondary collapses caused by foundation erosion. Continuous deformation can accelerate pipeline corrosion fatigue, increase maintenance costs, and in severe cases, require shutdown and replacement, affecting the normal operation of regional infrastructure and threatening public safety and the stability of surrounding buildings.

[0003] To address the aforementioned problems, existing technologies offer the following solutions: Firstly, adding an adjustable support device to the outside of the pipeline solves the problem of inconvenient height adjustment of existing pipeline support devices, making it difficult to adjust the height according to terrain. However, the adjustable support device requires high precision in assembly and disassembly, which is detrimental to pipeline installation and subsequent maintenance. Secondly, the invention patent with application number CN202210243845.8 uses a fixed plate, a support unit, and a fixing unit. The support unit is installed at the lower end of the fixed plate, and the fixing unit is installed at the upper end of the fixed plate. An annular groove is formed at the upper end of the fixed plate, and the inner wall of the annular groove is symmetrical. A limiting groove connected to the limiting groove is provided, and a threaded hole communicating with the outside is provided on the side of the limiting groove away from the annular groove; this effectively solves the problem of misalignment between the support unit and the pipeline when supporting pipelines at different heights; however, this technical solution presents some challenges in traditional pipeline systems for oil and gas, including the possibility of eccentricity or angle between the centerlines of two pipelines during installation, or settlement of the foundation of a single pipeline during use, causing eccentricity or angle between the centerlines of the pipelines, resulting in a decrease in the sealing of the connection between adjacent pipelines and the leakage of the medium inside the pipeline to the outside. Summary of the Invention

[0004] The purpose of this invention is to provide a self-regulating pipeline for oil and gas transportation to solve the problem that during pipeline installation, two pipelines become eccentric or their centerlines form an angle, or during pipeline use, the foundation of a single pipeline settles, causing eccentricity between pipelines or an angle between their centerlines, resulting in a decrease in the sealing performance of the connection between adjacent pipelines and leakage of the medium inside the pipeline to the outside.

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

[0006] A self-regulating pipeline for oil and gas transportation is characterized by comprising a pipeline body, a mounting base, a plug-in base, and a plug-in connector. The mounting base and the plug-in connector are coaxially fixedly installed on the outer walls of both ends of the pipeline body. A mounting groove is coaxially formed on the end face of the mounting base away from the plug-in connector. Multiple set bolts are threaded onto the end face of the mounting base near the plug-in connector, with one end of each set bolt extending into the mounting groove. The plug-in connector includes a connecting portion and a deformable portion. The connecting portion is rotatably connected to the end of the set bolt extending into the mounting groove. There are two deformable portions, and the cross-sections of the two deformable portions and the connecting portion are funnel-shaped, with the openings facing away from the plug-in connector. A first-order limiting ring and a second-order limiting ring are respectively provided on the inner walls of the mounting groove and the ends of the two deformable portions away from the set bolts. The two deformable portions are slidably connected to the two first-order limiting rings. The plug-in connector extends outside the pipeline body, and both the inner and outer side walls of the plug-in connector are provided with limiting protrusions that slide in cooperation with the second-order limiting ring of another pipeline body.

[0007] When the main pipe body is installed with another main pipe body, one end of the main pipe body with a connector and the other end with a mounting base are coaxially connected. The connector and the mounting base are tangent in cross-section. The limiting protrusion of the connector is tangent to the second limiting ring of the mounting base. The connecting part of the mounting base has a circular hole adapted to the set bolt on the end face near the connector. The set bolt has a threaded section and a smooth shaft section. The smooth shaft section of the set bolt is located at the end near the connecting part of the mounting base. The length of the smooth shaft section of the set bolt is adapted to the depth of the circular hole of the mounting base. The threaded hole of the mounting base is threadedly engaged with the threaded section of the set bolt. The threaded section moves axially within the threaded hole of the mounting base. The set bolt rotates linearly, driving the plug-in seat to move axially toward the opening of the mounting base. The connecting part of the plug-in seat forms an angle with the axis of the plug-in seat. The deformable part of the plug-in seat is tangent to the first limiting ring of the mounting base until the connecting part is horizontally tangent to the first limiting ring. By setting the plug-in seat and plug-in connector at the outer end of the pipe body, the problems of eccentricity or angle between the axis lines of two pipe bodies during installation and settlement of the foundation of a single pipe body during use are solved, thus ensuring the sealing performance of the pipe.

[0008] Preferably, the inner and outer side walls of the connector are provided with limiting grooves, the limiting grooves are located between the limiting protrusion and the pipe body, the surface of the limiting grooves is provided with a deformation layer, the deformation layer is made of elastic material, and when the pipe body is connected to another pipe body, the second limiting ring is embedded in the limiting groove.

[0009] The set bolt rotates linearly, driving the plug seat to move axially toward the opening of the mounting base. The deformable part of the plug seat is tangent to the first limiting ring of the mounting base until the connecting part is horizontally tangent to the first limiting ring. The deformable part of the plug seat squeezes the deformable layer of the plug and moves relative to the deformable layer. By setting the deformable layer in the limiting groove of the plug, the axial friction of the plug is increased in the limiting groove, thereby reducing the offset of the plug in the axial direction. This avoids the problem of the pipe body end face gap becoming larger due to the axial offset of the pipe body, and ensures the sealing of the pipe body.

[0010] Preferably, the pipe body has a coaxially formed insertion groove on one end face of the connector, and a No. 1 sealing ring is coaxially fixedly installed in the insertion groove. The No. 1 sealing ring extends to the outside of the pipe body. The pipe body has a coaxially formed movable groove on one end face of the mounting base. The inner and outer walls of the portion of the No. 1 sealing ring extending to the outside of the pipe body are provided with sealing protrusions, and the sealing protrusions on both sides are respectively interference-fitted with the side wall of the movable groove of the other pipe body.

[0011] When the pipe body is installed with another pipe body, the first sealing ring fixed in the embedding groove moves towards the movable groove in the axial direction, and the sealing protrusion of the first sealing ring is in interference fit with the movable groove. The depth D2 of the movable groove is greater than the length D1 of the first sealing ring extending outside the pipe body. By setting the sealing protrusion, a certain resistance magnitude of the sealing ring in the movable groove is ensured, and the depth D2 of the movable groove > D1, avoiding the problem that the first sealing ring disengages from the movable groove when the pipe sinks, causing the leakage of the medium inside the pipe body and ensuring the sealing performance of the end face of the pipe body.

[0012] Preferably, a communication groove is coaxially formed on the end face of one end of the pipe body provided with the socket joint. The inner side of the pipe body is communicated with the embedding groove through the communication groove. A first air chamber is arranged inside the first sealing ring, and the radial projections of the sealing protrusion and the communication groove are both located inside the first air chamber.

[0013] When there is medium transportation inside the pipe body, part of the medium will enter the communication groove and act with corresponding pressure on the first sealing ring. The local gas at the contact part of the communication groove in the first air chamber is compressed. The external pressure at one end of the first air chamber in the embedding groove increases, and part of the gas in the embedding groove will enter the movable groove. The gas volume in the first air chamber in the movable groove increases, and the sealing protrusion of the first sealing ring increases the friction force on the movable groove. By setting the first air chamber and the communication groove, the problem that the first sealing ring is excessively bent and deformed in the movable groove when the pipe sinks and the pipe bodies are eccentric or the center lines form an angle, causing the leakage of the medium inside the pipe body, is avoided, and the anti-twisting or anti-bending performance of the first sealing ring is ensured.

[0014] Preferably, a second sealing ring is coaxially and fixedly installed on the inner side wall of the socket. A second air chamber is arranged inside the second sealing ring. The rotary cross-section of the second air chamber is in an inverted U shape. When the socket joint is inserted into the socket on another pipe body, the limiting protrusion is in interference fit with the second sealing ring, and the radial projection of the limiting protrusion is located inside the second air chamber.

[0015] The set bolt rotates linearly, driving the plug-in seat to move axially towards the opening of the mounting base. The deformed part of the plug-in seat is tangent to the first limiting ring of the mounting base until the connecting part is horizontally tangent to the first limiting ring. The connecting part of the plug-in seat uniformly compresses the second sealing ring. At this time, the gas pressure in the second air chamber of the second sealing ring is equal. When the pipeline is eccentric or the axis is at an angle, the plug-in moves non-axially, compressing the second air chamber of the second sealing ring. The gas in the second air chamber automatically compensates for the gas pressure of the plug-in offset. By setting the second sealing ring and the second air chamber, when the pipeline is eccentric or the axis is at an angle, the plug-in and the plug-in seat are always connected. When the pipeline eccentricity increases or the angle between the axis increases, the second air chamber of the second sealing ring provides greater support to the plug-in, and the friction of the second sealing ring on the plug-in increases, ensuring the sealing between the plug-in and the plug-in seat.

[0016] Preferably, gears are coaxially mounted on the ends of the plurality of set bolts that do not extend into the mounting groove, and an internal gear ring is coaxially rotatably mounted on the end face of the mounting base near the connector, and the plurality of gears are meshed with the internal gear ring.

[0017] The set bolt rotates coaxially, driving the gear to rotate. The gear meshes with an internal gear ring, and the rotation of the internal gear ring drives the other gears to rotate. The uniform linear rotation of the set bolt drives the connector to move axially toward the opening of the mounting base. By setting the gear and internal gear ring, deformation or damage caused by uneven force on the connector during axial movement is avoided, ensuring the stability of the connector during movement.

[0018] Preferably, a No. 3 sealing ring is coaxially arranged in the mounting groove. The rotational section of the No. 3 sealing ring is wedge-shaped. The outer wall of the No. 3 sealing ring is slidably installed with the inner wall of the mounting groove with the maximum rotational diameter. The inner wall of the No. 3 sealing ring is slidably installed with the outer wall of the plug-in seat. A No. 3 limiting ring is provided on the end face of the No. 3 sealing ring near the set bolt. The No. 3 limiting ring is coaxially fixedly installed on the connecting part of the plug-in seat.

[0019] The set bolt rotates linearly, driving the plug-in seat to move axially towards the opening of the mounting base. The third limiting ring drives the third sealing ring to move axially towards the opening of the mounting base. By setting the third limiting ring and the third sealing ring, the medium inside the pipe body flows into the limiting groove of the mounting base through the pipe end face. The medium in the limiting groove pushes the third sealing ring to move axially towards the opening of the mounting base. The third sealing ring is tightly attached to the first limiting ring, avoiding the problem of leakage of the medium inside the pipe body directly flowing out of the pipe, thus ensuring the sealing performance of the pipe.

[0020] Preferably, a pressure sensor is installed inside the third sealing ring, and the pressure sensor is electrically connected to the leak prevention alarm system of the conveying pipeline.

[0021] When the pipeline becomes eccentric or the angle between the centerlines exceeds the limit, the medium inside the pipeline flows into the limiting groove of the mounting seat through the pipeline end face. The medium inside the pipeline pushes the No. 3 sealing ring to move axially towards the opening of the mounting seat. Finally, the No. 3 sealing ring is tightly attached to the No. 1 limiting ring. The trigger source of the pressure sensor is triggered by the compression of the No. 3 sealing ring, and the pressure sensor transmits a signal to the leak prevention alarm system. By setting up the leak prevention alarm system and the pressure sensor, the situation where people cannot know in time when the pipeline leaks is avoided, ensuring the final sealing protection of the pipeline.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. By installing plug-in sockets and plug-in joints at the outer end of the main pipe body, the problems of eccentricity or angle between the centerlines of two main pipe bodies during installation and settlement of the foundation of a single main pipe body during use are solved, thus ensuring the sealing of the pipe.

[0024] 2. By setting up a No. 1 air chamber and a connecting groove, the problem of excessive bending deformation of the No. 1 sealing ring in the movable groove is avoided when the pipeline body is eccentric or the center lines are at an angle during pipeline sinking, which would cause leakage of the medium inside the pipeline body. This ensures the torsion resistance or bending resistance of the No. 1 sealing ring.

[0025] 3. By setting a second sealing ring and a second air chamber, when the pipeline is eccentric or the center lines are at an angle, the plug and the socket are always connected. When the pipeline eccentricity increases or the angle between the center lines increases, the second air chamber in the second sealing ring provides greater support to the plug and the friction of the second sealing ring on the plug increases, thus ensuring the sealing between the plug and the socket.

[0026] 4. By setting a No. 3 limiting ring and a No. 3 sealing ring, the medium inside the pipe body flows into the limiting groove of the mounting seat through the pipe end face. The medium in the limiting groove pushes the No. 3 sealing ring to move axially towards the opening of the mounting seat. The No. 3 sealing ring is in close contact with the No. 1 limiting ring, which avoids the problem of the medium inside the pipe body leaking out directly outside the pipe and ensures the sealing performance of the pipe. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 for Figure 1 Full sectional view at point AA;

[0029] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0030] Figure 4 This is a schematic diagram showing the state of two adjacent pipe bodies after they have been fixedly connected.

[0031] Figure 5 This is a schematic diagram showing the state of two adjacent pipe bodies after eccentricity occurs.

[0032] Figure 6 This is a schematic diagram showing the state of two adjacent pipe bodies when their axes form an angle.

[0033] In the diagram: 1. Pipe body; 2. Mounting base; 201. No. 1 limiting ring; 202. Mounting groove; 203. Round hole; 204. Threaded hole; 3. Plug-in connector; 301. Limiting protrusion; 302. Limiting groove; 3021. Deformation layer; 4. Plug-in connector; 401. Connecting part; 402. Deformation part; 403. No. 2 limiting ring; 404. No. 3 limiting ring; 5. Set bolt; 6. Embedded groove; 7. No. 1 sealing ring; 701. Sealing protrusion; 8. Movable groove; 9. Connecting groove; 10. No. 1 air chamber; 11. No. 2 sealing ring; 12. No. 2 air chamber; 13. Gear; 14. Internal gear ring; 15. No. 3 sealing ring. Detailed Implementation

[0034] Please see Figures 1 to 6 This invention provides a self-regulating pipeline for transporting oil and natural gas, the technical solution of which is as follows:

[0035] Please refer to a self-regulating pipeline for oil and gas transportation. Figures 1 to 6The system includes a pipe body 1, a mounting base 2, a plug-in base 4, and a plug-in connector 3. The mounting base 2 and the plug-in connector 3 are coaxially fixedly installed on the outer side walls at both ends of the pipe body 1. Limiting grooves 302 are provided on the inner and outer side walls of the plug-in connector 3. The limiting grooves 302 are located between the limiting protrusion 301 and the pipe body 1. A deformation layer 3021 made of elastic material is provided on the surface of the limiting groove 302. When the pipe body 1 is connected to another pipe body 1, a second limiting ring 403 is embedded in the limiting groove 302. An embedding groove 6 is coaxially opened on one end face of the pipe body 1 where the plug-in connector 3 is located. A first sealing ring 7 is coaxially fixedly installed in the embedding groove 6, extending to the outside of the pipe body 1. One end face of the pipe body 1 where the mounting base 2 is located... A movable groove 8 is coaxially formed on the surface. Sealing protrusions 701 are provided on the inner and outer walls of the portion of the first sealing ring 7 extending outside the pipe body 1. The sealing protrusions 701 on both sides are interference-fitted with the side walls of the movable groove 8 on the other pipe body 1. The depth of the movable groove 8 is D2 = 20mm, which is greater than the length of the first sealing ring 7 extending outside the pipe body 1, D1 = 10mm. A connecting groove 9 is coaxially formed on one end face of the pipe body 1 where the plug-in 3 is located. The inner side of the pipe body 1 is connected to the embedded groove 6 through the connecting groove 9. A first air chamber 10 is provided inside the first sealing ring 7. The radial projections of the sealing protrusions 701 and the connecting groove 9 are both located within the first air chamber 10. A second sealing ring 11 is coaxially fixedly installed on the inner wall of the plug-in 4. A second air chamber 12 is provided inside ring 11. The cross-section of the second air chamber 12 is "U" shaped. When the plug 3 is inserted into the plug seat 4 on another pipe body 1, the limiting protrusion 301 is press-fitted with the second sealing ring 11, and the radial projection of the limiting protrusion 301 is located inside the second air chamber 12. A mounting groove 202 is coaxially opened on the end face of the mounting base 2 away from the plug 3. Multiple set bolts 5 are threadedly connected to the end face of the mounting base 2 near the plug 3. One end of the multiple set bolts 5 extends into the mounting groove 202. Gears 13 are coaxially mounted on the ends of the multiple set bolts 5 that do not extend into the mounting groove 202. An internal gear ring 14 is coaxially rotatably mounted on the end face of the mounting base 2 near the plug 3. Multiple gears 13 are all connected to the internal gear ring 14. 4. Engagement installation: The plug-in socket 4 includes a connecting part 401 and a deformable part 402. The connecting part 401 is rotatably connected to one end of the set bolt 5 extending into the mounting groove 202. The number of deformable parts 402 is [number missing]. The two deformable parts 402 and the rotating cross section of the connecting part 401 are funnel-shaped, and the opening faces away from the plug-in 3. The inner sidewalls of the mounting groove 202 and the two deformable parts 402 away from the set bolt 5 are respectively provided with a first limiting ring 201 and a second limiting ring 403. The two deformable parts 402 are slidably connected to the two first limiting rings 201 respectively. The plug-in 3 extends to the outside of the pipe body 1. The inner and outer sidewalls of the plug-in 3 are provided with limiting protrusions 301 that slide with the second limiting ring 403 of the other pipe body 1.

[0036] For further details, please refer to Figure 2 A No. 3 sealing ring 15 is coaxially arranged in the mounting groove 202. The rotation section of the No. 3 sealing ring 15 is wedge-shaped. The outer wall of the No. 3 sealing ring 15 is slidably installed with the inner wall of the maximum rotation diameter of the mounting groove 202. The inner wall of the No. 3 sealing ring 15 is slidably installed with the outer wall of the plug-in seat 4. A No. 3 limiting ring 404 is provided on the end face of the No. 3 sealing ring near the set bolt 5. The No. 3 limiting ring 404 is coaxially fixedly installed on the connecting part 401 of the plug-in seat 4. A pressure sensor is installed in the No. 3 sealing ring 15. The pressure sensor is electrically connected to the anti-leakage alarm system of the conveying pipeline.

[0037] Working principle: Please refer to Figures 1 to 4 When two pipe bodies 1 are installed, when pipe body 1 is installed with another pipe body 1, one end of pipe body 1 with a plug 3 and the other end with a mounting base 2 are coaxially connected. The cross section of plug 3 is tangent to the cross section of plug base 4. The limiting protrusion 301 of plug 3 is tangent to the second limiting ring 403 of plug base 4. The threaded hole 204 of mounting base 2 is threadedly engaged with the threaded section of set bolt 5. The threaded section of set bolt 5 moves axially within the threaded hole 204 of mounting base 2. The optical axis section of set bolt 5 is within the circular hole 203 of plug base 4. The rotation of set bolt 5 linearly drives plug base 4 to move axially toward the opening direction of mounting base 2. The connecting part 401 of plug base 4 forms an angle with the axis of plug base 4. The deformable part 402 of plug base 4 is tangent to the first limiting ring 201 of mounting base 2 until the connecting part 401 is horizontally tangent to the first limiting ring 201.

[0038] For further details, please refer to Figures 1 to 6 When the foundation of a single pipeline body 1 experiences slight settlement, causing slight eccentricity between pipeline bodies 1 or a small angle between their centerlines, the No. 1 sealing ring 7, fixedly installed in the embedded groove 6, is stretched in the non-axial direction. The stretching and deformation of the No. 1 sealing ring 7 causes compression at the deformation point of the No. 1 air chamber 10. The gas pressure inside the No. 1 air chamber 10 within the movable groove 8 increases. Since there is media being transported inside the pipeline body 1, some media will enter the connecting groove 9 and exert corresponding pressure on the No. 1 sealing ring 7. The local gas in the No. 1 air chamber 10 at the contact point with the connecting groove 9 is compressed. The external pressure of the gas chamber 10 at one end of the embedded groove 6 increases. The gas pressure in the gas chamber 10 of the first sealing ring 7 in both the movable groove 8 and the embedded groove 6 increases. The sealing protrusion 701 of the first sealing ring 7 increases the frictional force on the movable groove 8. The plug joint 3 undergoes non-axial movement to squeeze the second gas chamber 12 in the second sealing ring 11. The gas in the squeezed part of the second gas chamber 12 flows into the non-squeezed part. The gas volume in the non-squeezed part of the second gas chamber 12 increases. The frictional force of the second sealing ring 11 on the non-squeezed part increases, ensuring the sealing of the end face of the pipeline body 1 and the sealing between the plug joint 3 and the plug seat 4.

[0039] For further details, please refer to Figures 1 to 6 When the foundation of a single pipeline body 1 experiences severe settlement, causing significant eccentricity between pipeline bodies 1 or a large angle between their centerlines, multiple set bolts 5 rotate linearly, driving the plug-in seat 4 to move axially toward the opening of the mounting seat 2. The third limiting ring 404 drives the third sealing ring 15 to move axially toward the opening of the mounting seat 2. When the first sealing ring 7 breaks and leaks, the medium inside the pipeline body 1 flows into the limiting groove 302 of the mounting seat 2 through the pipeline end face. The medium in the limiting groove 302 pushes the third sealing ring 15 to move axially toward the opening of the mounting seat 2. Finally, the third sealing ring 15 is tightly pressed against the first limiting ring 201. The trigger source of the pressure sensor is triggered by the compression of the third sealing ring 15. The pressure sensor transmits a signal to the pipeline's leak prevention alarm system, ensuring the final sealing protection of the pipeline.

[0040] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A self-regulating pipeline for transporting oil and natural gas, characterized in that, The system includes a pipe body (1), a mounting base (2), a plug-in base (4), and a plug (3). The mounting base (2) and the plug (3) are coaxially fixedly installed on the outer side walls at both ends of the pipe body (1). The mounting base (2) has a coaxial mounting groove (202) on its end face away from the plug (3). Multiple set bolts (5) are threaded onto the end face of the mounting base (2) near the plug (3), with one end of each set bolt (5) extending into the mounting groove (202). The plug-in base (4) includes a connecting part (401) and a deformable part (402). The connecting part (401) is rotatably connected to the end of each set bolt (5) extending into the mounting groove (202). The number of the deformable parts (402) is 2. The two deformable parts (402) and the connecting part (401) have a flared cross section and the opening faces away from the plug (3). The inner sidewalls of the mounting groove (202) and the two deformable parts (402) away from the set bolt (5) are respectively provided with a first limiting ring (201) and a second limiting ring (403). The two deformable parts (402) are slidably connected to the two first limiting rings (201). The plug (3) extends to the outside of the pipe body (1). The inner and outer sidewalls of the plug (3) are provided with limiting protrusions (301) that slide with the second limiting ring (403) of the other pipe body (1).

2. The self-regulating pipeline for oil and gas transportation according to claim 1, characterized in that, The inner and outer side walls of the connector (3) are provided with limiting grooves (302). The limiting grooves (302) are located between the limiting protrusion (301) and the pipe body (1). The surface of the limiting grooves (302) is provided with a deformation layer (3021). The deformation layer (3021) is made of elastic material. When the pipe body (1) is connected to another pipe body (1), the second limiting ring (403) is embedded in the limiting groove (302).

3. The self-regulating pipeline for transporting oil and natural gas according to claim 1, characterized in that, The pipe body (1) has a coaxially formed insertion groove (6) on one end face of the connector (3). A first sealing ring (7) is coaxially fixed in the insertion groove (6). The first sealing ring (7) extends to the outside of the pipe body (1). The pipe body (1) has a coaxially formed movable groove (8) on one end face of the mounting base (2). The inner and outer walls of the part of the first sealing ring (7) extending to the outside of the pipe body (1) are provided with sealing protrusions (701). The sealing protrusions (701) on both sides are respectively interference-fitted with the side wall of the movable groove (8) of the other pipe body (1).

4. A self-regulating pipeline for transporting oil and natural gas according to claim 3, characterized in that, The pipe body (1) is provided with a connecting groove (9) coaxially opened on one end face of the plug (3). The inner side of the pipe body (1) is connected to the embedded groove (6) through the connecting groove (9). The first sealing ring (7) is provided with a first air chamber (10). The radial projections of the sealing protrusion (701) and the connecting groove (9) are both located in the first air chamber (10).

5. A self-regulating pipeline for oil and natural gas transportation according to claim 1, characterized in that, On the inner side wall of the socket (4), a second sealing ring (11) is coaxially and fixedly installed. A second air chamber (12) is arranged inside the second sealing ring (11). The rotating cross-section of the second air chamber (12) is in an inverted U shape. When the plug connector (3) is inserted into the socket (4) on another pipeline main body (1), the limiting protrusion (301) is in interference fit with the second sealing ring (11), and the radial projection of the limiting protrusion (301) is located inside the second air chamber (12).

6. A self-regulating pipeline for transporting oil and natural gas according to claim 1, characterized in that, At one end of each of the plurality of set bolts (5) that does not extend into the installation groove (202), a gear (13) is coaxially installed. An internal gear ring (14) is coaxially and rotatably installed on the end face of the installation seat (2) close to the plug connector (3). All the plurality of gears (13) are meshed and installed with the internal gear ring (14).

7. A self-regulating pipeline for transporting oil and natural gas according to claim 1, characterized in that, A third sealing ring (15) is coaxially arranged inside the installation groove (202). The rotating cross-section of the third sealing ring (15) is wedge-shaped. The outer side wall of the third sealing ring (15) is slidably installed on the inner side wall of the maximum rotating diameter of the installation groove (202). The inner side wall of the third sealing ring (15) is slidably installed on the outer side wall of the socket (4). On the end face of the third sealing ring close to the set bolt (5), a third limiting ring (404) is provided. The third limiting ring (404) is coaxially and fixedly installed on the connecting portion (401) of the socket (4).

8. A self-regulating pipeline for transporting oil and natural gas according to claim 7, characterized in that, A pressure sensor is arranged inside the third sealing ring (15). The pressure sensor is electrically connected to the anti-leakage alarm system of the conveying pipeline.

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