Pipe hydraulic internal aligner

Abstract

The application relates to the technical field of mouthpiece, in particular to a pipeline hydraulic inner mouthpiece, which comprises a moving mechanism, a traction mechanism and a butt joint mechanism. The moving mechanism comprises a vehicle body, a limiting part and a moving part a. The moving part a is arranged at the bottom end of the vehicle body. The limiting part is arranged on the vehicle body. The traction mechanism is arranged on the vehicle body. The butt joint mechanism comprises a ball a, a ball b, a chain link, an extension part a, an inner supporting plate, a moving part b and a moving part c. The ball b is provided with a plurality of chain structures which are connected in series through the chain links and are connected with the traction mechanism. The ball a is connected with the ball b through the chain links. The ball b is provided with a switching groove and a groove a. The moving part b is arranged inside the groove a. The ball a is provided with a switching groove and a groove b. The moving part c is arranged inside the groove b. The ball a is provided with a groove c. The extension part a is arranged in the groove c and is connected with the inner supporting plate. The pipeline hydraulic inner mouthpiece can force the central axes of two pipes to coincide through the chain structure, can complete accurate alignment and can reduce the butt joint difficulty of the pipelines.

Description

Technical Field

[0001] This invention relates to the field of alignment equipment technology, and more specifically to a pipeline hydraulic internal alignment equipment. Background Technology

[0002] A water supply pipe connector is a specialized tool used in pipeline construction to precisely connect two sections of pipe, which can significantly improve the quality and efficiency of the connection.

[0003] Chinese patent CN216730405U discloses a hydraulic pipe alignment device. By setting the mounting pipe of the traveling frame along the length of the pipe and placing the alignment mechanism on the mounting pipe, the entire alignment device can be moved simply by moving the mounting pipe, thus improving stability. The pipe gripping structure can grip the pipe, and the approach structure can drive one pipe to move towards another through the pipe gripping structure, achieving automatic approach without the need for external force, making operation simple and convenient. The alignment structure can align the two pipes and correct the roundness of the pipe ends, ensuring the quality of the connection.

[0004] However, the aforementioned existing technology has the following drawbacks: When connecting pipes, the existing technology requires preliminary alignment of the two pipes (the two pipes should be in a straight line) to ensure that the connector can enter the inside of the pipe in a straight line. During the preliminary alignment process, it is necessary to use a crane or other equipment to make preliminary adjustments to the pipes, which increases the difficulty of connecting the pipes. In addition, the connector in the existing technology does not have a welding function, requiring workers to manually weld with hand-held welding tools or to use external welding equipment, which reduces the welding efficiency of the pipes. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a hydraulic internal alignment device for pipelines.

[0006] The technical solution of the present invention: a hydraulic internal alignment device for pipelines, comprising: The moving mechanism includes a vehicle body, a limiting part, and a moving part a; the moving part a is located at the bottom end of the vehicle body; the limiting part is located on the vehicle body. The traction mechanism includes a traction motor, a take-up roller, a traction rope, and plate a; the take-up roller is rotatably mounted on the vehicle body; the traction motor is mounted on the vehicle body and is connected to the take-up roller for transmission; the traction rope is wound around the take-up roller and connected to plate a; the vehicle body is U-shaped, and a groove is provided on the inner wall of the vehicle body; plate a is slidably connected to the groove through slider a. The docking mechanism includes sphere a, sphere b, chain links, telescopic component a, inner support plate, moving part b, and moving part c. Multiple spheres b are connected in series via chain links to form a chain structure. Sphere a is connected to the outermost sphere b via a chain link. The other sphere b is detachably connected to plate a. Sphere b has symmetrical transition grooves and circumferentially distributed grooves a. Moving part b is located inside groove a. Sphere a has transition grooves and circumferentially distributed grooves b. Moving part c is located inside groove b. Grooves c are formed on sphere a between adjacent grooves b. Telescopic component a is located in groove c and connected to the inner support plate. The chain link includes rod a and transition balls. Two transition balls are connected to both ends of rod a. The transition balls are movably connected to the transition grooves. The welding mechanism, mounted on the vehicle body, is used for laser welding of pipes.

[0007] Preferably, the moving part a includes a U-shaped block a, a roller a, and a motor a; the U-shaped block a is connected to the bottom of the vehicle body; the roller a is rotatably disposed inside the U-shaped block; and the motor a is disposed on the U-shaped block a and is connected to the roller a for transmission.

[0008] Preferably, the limiting part includes a screw, a drill rod, and a threaded cylinder; the threaded cylinder is connected through the vehicle body; the screw and the threaded cylinder are threadedly connected; the bottom end of the screw is connected to the drill rod; and a turntable is connected to the top end of the screw.

[0009] Preferably, the output end of the traction motor is connected to gear a; one end of the take-up roller is connected to gear b; gear b meshes with gear a.

[0010] Preferably, the moving part b includes a telescopic component b, a U-shaped block b, a roller b, and a motor b; the telescopic component b is disposed inside the groove a and connected to the U-shaped block b; the roller b is rotatably disposed inside the U-shaped block b; the motor b is disposed on the U-shaped block b and is connected to the roller b for transmission.

[0011] Preferably, the moving part c includes a telescopic component c, a U-shaped block c, a roller c, and a motor c; the telescopic component c is disposed inside the groove b and connected to the U-shaped block c; the roller c is rotatably disposed inside the U-shaped block c; the motor c is disposed on the U-shaped block c and is connected to the roller c for transmission.

[0012] Preferably, the welding mechanism includes a moving ring, a telescopic component d, a moving part d, a motor e, a gear ring, and a laser welding head; the moving ring is slidably connected to the slide groove of the vehicle body via a slider b; multiple sets of telescopic components d are provided and circumferentially distributed on the moving ring; the telescopic component d is connected to the moving part d; the gear ring is rotatably connected to the moving ring; the motor e is located on the moving ring and its output end is connected to a gear c that meshes with the gear ring; the laser welding head is located on the gear ring.

[0013] Preferably, the moving part d includes a motor d, a U-shaped block d, and a roller d; the U-shaped block d is connected to the telescopic component d; the roller d is rotatably disposed inside the U-shaped block d; the motor d is disposed on the U-shaped block d and is connected to the roller d for transmission.

[0014] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: By setting up a traction mechanism and a docking mechanism, the chain mechanism passes through the pipes to be docked and is supported by its internal structure. At the same time, one end of the chain structure is fixed to the inside of the pipe that has already been docked and welded. The traction mechanism pulls the chain structure, causing the entire chain structure to gradually straighten. During the straightening process, the chain structure forms a rigid linear reference, constraining the coaxiality, radial offset, and angular deflection of the pipes to be docked, forcing the central axes of the two pipes to coincide, and completing precise alignment. There is no need to use cranes or other tools to pre-align the pipes, reducing the requirements for the initial position between the pipes and thus reducing the difficulty of pipe docking.

[0015] By incorporating a welding mechanism, after the pipeline is connected, the welding mechanism moves to the joint and uses a laser welding head to perform laser welding on the joint, realizing the automatic welding function of the pipeline. This eliminates the need for workers to manually use welding tools, reducing workload and improving welding efficiency. Attached Figure Description

[0016] Figure 1 A three-dimensional representation of an embodiment of the present invention Figure 1 ; Figure 2 A three-dimensional representation of an embodiment of the present invention Figure 2 ; Figure 3 This is a cross-sectional schematic diagram of a chain structure in one embodiment of the present invention; Figure 4 This is a schematic diagram of the assembly structure of the welding mechanism in one embodiment of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the assembly structure of the welding mechanism in one embodiment of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the connection structure between the traction mechanism and the chain structure in one embodiment of the present invention; Figure 7 This is a schematic diagram of the vehicle body structure in one embodiment of the present invention.

[0017] Reference numerals: 1. Vehicle body; 101. Slide groove; 2. U-block a; 3. Motor a; 4. Roller a; 5. Drill rod; 6. Screw; 7. Take-up roller; 8. Traction rope; 9. Gear b; 10. Traction motor; 11. Gear a; 12. Plate a; 13. Moving ring; 14. Gear ring; 15. Telescopic component d; 16. Motor e; 17. Gear c; 18. Sphere a; 19. U-block c; 20. Motor c; 21. Roller c; 22. Inner support plate; 23. Laser welding head; 24. Sphere b; 25. Telescopic component a; 26. Telescopic component b; 27. Adapter ball; 28. Rod a; 29. ​​U-block b; 30. Motor b; 31. Roller b; 32. Telescopic component c; 33. Roller d; 34. Motor d. Detailed Implementation

[0018] Example 1, as Figures 1-3 and Figures 6-7 As shown, the present invention proposes a hydraulic internal alignment device for pipelines, comprising a moving mechanism, a traction mechanism, a docking mechanism, and a welding mechanism; The moving mechanism includes a vehicle body 1, a limiting part, and a moving part a; the moving part a is located at the bottom end of the vehicle body 1; the limiting part is located on the vehicle body 1; the moving part a includes a U-shaped block a2, a roller a4, and a motor a3; the U-shaped block a2 is connected to the bottom end of the vehicle body 1; the roller a4 is rotatably located inside the U-shaped block; the motor a3 is located on the U-shaped block a2 and is connected to the roller a4 for transmission; the limiting part includes a screw 6, a drill rod 5, and a threaded cylinder; the threaded cylinder is connected through the vehicle body 1; the screw 6 is threadedly connected to the threaded cylinder; the bottom end of the screw 6 is connected to the drill rod 5; a turntable is connected to the top end of the screw 6; It should be noted that motor a3 drives roller a4 to rotate, which in turn drives the vehicle body 1 to move. The vehicle body 1 then drives the traction mechanism and docking mechanism to move. The turntable drives screw 6 to rotate, and under the action of the threaded cylinder, screw 6 rotates and moves downward. Screw 6 drives drill rod 5 to rotate and move downward, allowing drill rod 5 to drill into the ground, limiting the position of vehicle body 1 and ensuring the stability of vehicle body 1, thereby ensuring the stability of the docking mechanism.

[0019] The traction mechanism includes a traction motor 10, a take-up roller 7, a traction rope 8, and a plate a12. The take-up roller 7 is rotatably mounted on the vehicle body 1. The traction motor 10 is mounted on the vehicle body 1 and is connected to the take-up roller 7 for transmission. The traction rope 8 is wound around the take-up roller 7 and connected to the plate a12. The traction rope 8 is a high-strength traction rope, including but not limited to Dyneema rope, with a specific strength 1.5-15 times that of steel wire, and only 1 / 7 the weight of steel wire rope at the same tensile force. It has almost zero elongation, is insulating and non-conductive, resistant to acid, alkali, and seawater, maintains its performance in extreme cold (-40℃), floats on water, and does not spark when rubbed. Its wear resistance is 10 times that of nylon. The vehicle body 1 is U-shaped, and a groove 101 is provided on the inner wall of the vehicle body 1. The plate a12 is slidably connected to the groove 101 through a slider a. The output end of the traction motor 10 is connected to a gear a11. One end of the take-up roller 7 is connected to a gear b9. The gear b9 meshes with the gear a11. It should be noted that the traction motor 10 drives the gear a11 to rotate, the gear a11 drives the gear b9 to rotate, and the gear b9 drives the take-up roller 7 to rotate; the take-up roller 7 winds up the traction rope 8; the traction rope 8 pulls the plate a12 to slide along the slide groove 101, and the plate a12 pulls the docking mechanism to move, providing driving force for the docking mechanism to realize the correction and docking of the pipeline.

[0020] The docking mechanism includes sphere a18, sphere b24, chain links, telescopic component a25, inner support plate 22, moving part b, and moving part c; multiple spheres b24 are connected in series via chain links to form a chain structure; the chain structure is longer than the length of the pipe to be docked; sphere a18 is connected to the outermost sphere b24 via chain links; both spheres a18 and b24 are made of carbon fiber composite material, with an axial tensile strength of 1500~2500MPa and a specific strength 5~10 times that of steel. It features lightweight, high rigidity, extremely low rotational inertia, resistance to deformation, and rust resistance; it is easy for workers to move manually; the other end of the sphere b24 is detachably connected to the plate a12; the sphere b24 has symmetrical transition grooves and circumferentially distributed grooves a; the moving part b is located inside the groove a; the sphere a18 has transition grooves and circumferentially distributed grooves b; the moving part c is located inside the groove b; the sphere a18 has a groove c between adjacent grooves b; the telescopic component a25 is provided with... Within the groove c and connected to the inner support plate 22, the telescopic component a25 includes, but is not limited to, a cylinder or similar device; the chain link includes a rod a28 and a connecting ball 27; two connecting balls 27 are provided and connected to both ends of the rod a28; the connecting balls 27 are movably connected to the connecting groove; the moving part b includes a telescopic component b26, a U-shaped block b29, a roller b31, and a motor b30; the telescopic component b26 is located inside the groove a and connected to the U-shaped block b29; the telescopic component b26 includes, but is not limited to, a cylinder or similar device; the roller... b31 is rotatably located inside the U-shaped block b29; motor b30 is located on the U-shaped block b29 and is connected to the roller b31 for transmission; the moving part c includes a telescopic component c32, a U-shaped block c19, a roller c21 and a motor c20; the telescopic component c32 is located inside the groove b and is connected to the U-shaped block c19; the telescopic component c32 includes, but is not limited to, devices such as cylinders; the roller c21 is rotatably located inside the U-shaped block c19; motor c20 is located on the U-shaped block c19 and is connected to the roller c21 for transmission.

[0021] It should be noted that during the pipeline laying process, supports are needed to support and fix the pipeline, and there is space between the pipeline and the ground.

[0022] It should be noted that, first, the position between the chain structure and the previously connected pipe is calibrated. The ball a18 is placed inside the previously connected pipe. Then, the telescopic component c32 is activated, which drives the moving part c to move, causing the roller c21 to contact the inner wall of the pipe. Then, the motor c20 is activated, which drives the roller c21 to rotate, causing the ball a18 to move inside the pipe, thereby pulling the chain structure into the inner wall of the pipe until the plate a12 contacts the pipe cross-section. At this point, the chain structure and the pipe are coaxially aligned. Then, the roller c21 is moved away from the inner wall of the pipe, and the motor a3 is activated. The motor a3 drives the roller a4 to rotate, causing the vehicle body 1 to move, thereby pulling the chain structure out of the pipe to complete the calibration operation.

[0023] If the driving force of motor c20 is insufficient, for the ball b24 that enters the inside of the pipe, the telescopic component b26 on it can be activated to drive the moving part b to move, so that the roller b31 contacts the inner wall of the pipe. Then, motor b30 can be turned on to make the roller b31 rotate, thereby increasing the driving force.

[0024] After the calibration is completed, the vehicle body 1 is first fixed by the fixing part, allowing ball a18 to enter the inside of the pipe to be docked. Then, the telescopic component c32 drives the moving part c to move, causing roller c21 to contact the inner wall of the pipe. The motor c20 is turned on, and the motor c20 drives roller c21 to rotate, causing ball a18 to move inside the pipe and simultaneously moving ball b24. When ball a18 moves to the end of the pipe, the telescopic component b26 is activated, causing roller b31 in the moving part b to abut against the inner wall of the pipe, thus supporting the entire pipe to be docked from the inside. Roller b31 is made of polyurethane (PU) material, which is wear-resistant and tear-resistant. Features: The motor b30 is activated, causing the roller b31 to rotate, allowing the chain structure to pass through the pipe to be connected. Simultaneously, the ball a18 is pushed close to the pipe that has already been welded. The worker then places the ball a18 inside the welded pipe. Next, the telescopic component a25 is activated, causing the inner support plate 22 to move and contact the inner wall of the welded pipe. The inner support plate 22 is made of vulcanized rubber; the coefficient of friction of vulcanized rubber is between 0.8 and 1.2 (the highest among rubber materials), resulting in significant friction between the inner support plate 22 and the inner wall of the pipe, facilitating the straightening of the chain structure.

[0025] Next, the traction motor 10 is turned on, which drives the winding roller 7 to rotate. The winding roller 7 begins to wind up the traction rope 8, which drives the plate a12 to move. The plate a12 pulls the ball b24 to move, causing the entire chain structure to gradually straighten. During the straightening process, the chain structure forms a rigid linear reference, constraining the coaxiality, radial offset, and angular deflection of the pipes to be connected, forcing the central axes of the two pipes to coincide, and completing precise alignment (during this process, the pipes to be connected change from being on the ground to being suspended in the air, and the chain structure provides support for them). Then, the motor b30 is turned on again to drive the roller b31 to rotate. Since the ball a18 is fixed inside the pipe that has been welded, the entire chain structure is in a fixed state. At this time, the rotation of the roller b31 will push the pipe to be connected to move, so that the pipe to be connected and the pipe that has been welded can be connected. There is no need to use a crane or other tools to pre-align the pipes, which reduces the requirements for the initial position between the pipes and thus reduces the difficulty of pipe connection.

[0026] The welding mechanism is located on vehicle body 1 and is used for laser welding of pipes.

[0027] Example 2, as Figure 4-5As shown, the present invention proposes a hydraulic internal alignment device for pipelines. Compared with Embodiment 1, this embodiment further includes a welding mechanism. The welding mechanism includes a moving ring 13, a telescopic component d15, a moving part d, a motor e16, a gear ring 14, and a laser welding head 23. The moving ring 13 is slidably connected to the slide groove 101 of the vehicle body 1 via a slider b. Multiple sets of telescopic components d15 are provided and circumferentially distributed on the moving ring 13. The telescopic component d15 is connected to the moving part d. The gear ring 14 is rotatably connected to the moving ring 13. The motor e16 is located on the moving ring 13, and its output end is connected to a gear c17 that meshes with the gear ring 14. The laser welding head 23 is located on the gear ring 14. The moving part d includes a motor d34, a U-shaped block d, and a roller d33. The U-shaped block d is connected to the telescopic component d15. The roller d33 is rotatably located inside the U-shaped block d. The motor d34 is located on the U-shaped block d and is drively connected to the roller d33.

[0028] In this embodiment, after the pipes are aligned, when welding the pipe joint is required, motor b30 is first started, causing roller b31 to rotate and drive the pipe to be welded towards the welding mechanism, so that the pipe to be welded moves to the inside of the moving ring 13. Then, telescopic component d15 is activated, and telescopic component d15 drives moving part d to move, so that the rolling wheel d contacts the outer surface of the pipe to be welded. Then, motor b30 drives roller b31 to rotate again, so that the pipe to be welded, carrying the welding structure, moves towards the pipe that has been welded in front until it is welded. Then, motor d34 is activated, and motor d34 drives roller d33 to rotate, so that the moving ring 13 moves on the pipe to be welded, thereby driving the laser welding head 23 to move, so that it moves above the joint. Simultaneously, motor e16 is activated when the laser welding head 23 is activated. Motor e16 drives gear ring 14 to rotate, thereby driving the laser welding head 23 to rotate, realizing the welding function of the joint. There is no need for workers to hold welding tools to perform welding operations, reducing workload and improving welding efficiency.

[0029] After welding is completed, the screw 6 is rotated by the turntable to move the drill rod 5 upward, releasing the limit of the vehicle body 1. Then, the moving part a drives the vehicle body 1 to move toward the pipe until one end of the pipe is located inside the vehicle body 1 (the vehicle body 1 is U-shaped, and the inside here refers to the inside of the U-shaped structure). Then, the motor d34 is turned on again to make the roller d33 rotate, thereby driving the moving ring 13 to move toward the vehicle body 1 until the slider b on the moving ring 13 slides back to the inside of the groove 101 of the vehicle body 1, thus realizing the reset of the welding mechanism.

[0030] It is worth noting that after the vehicle body 1 is released from its fixed state, the chain structure no longer supports the pipeline. The pipeline has been welded, and the pipeline in front will provide temporary support. After the welding mechanism is reset, the staff will bring in the support piers to support and fix the pipeline.

[0031] It should be noted that all electronic devices in this application are controlled by a PLC controller (not shown in the figure) to operate in an orderly manner.

[0032] In summary, before connecting the pipes, the position of vehicle body 1 is calibrated first. Ball a18 is placed inside the previously connected pipe. Then, telescopic component c32 is activated, causing the moving part c to move, making roller c21 contact the inner wall of the pipe. Motor c20 is then activated, causing roller c21 to rotate, moving ball a18 inside the pipe and pulling the chain structure inside until plate a12 contacts the pipe cross-section. At this point, the chain structure is coaxial with the pipe. Then, roller c21 is moved away from the inner wall of the pipe, and motor a3 is activated, causing roller a4 to rotate, moving vehicle body 1 and pulling the chain structure out of the pipe to complete the calibration operation.

[0033] If the driving force of motor c20 is insufficient, for the ball b24 that enters the inside of the pipe, the telescopic component b26 on it can be activated to drive the moving part b to move, so that the roller b31 contacts the inner wall of the pipe. Then, motor b30 can be turned on to make the roller b31 rotate, thereby increasing the driving force.

[0034] After the calibration is completed, the turntable drives the screw 6 to rotate, which in turn drives the drill rod 5 to drill into the ground and fix the vehicle body 1. This allows the ball a18 to enter the inside of the pipe to be docked. Then, the telescopic component c32 drives the moving part c to move, so that the roller c21 contacts the inner wall of the pipe. The motor c20 is turned on, and the motor c20 drives the roller c21 to rotate, causing the ball a18 to move inside the pipe to be docked and simultaneously moving the ball b24. When the ball a18 moves to the end of the pipe to be docked, the telescopic component b26 is activated, so that the roller b31 in the moving part b abuts against the inside of the pipe. The wall thus supports the entire pipe to be connected from the inside. The motor b30 is turned on, causing the roller b31 to rotate, so that the chain structure passes through the pipe to be connected. At the same time, the ball a18 is pushed close to the pipe that has been connected and welded. Then, the staff manually places the ball a18 inside the pipe that has been connected and welded. Then, the telescopic component a25 is turned on, and the telescopic component a25 drives the inner support plate 22 to move, so that the inner support plate 22 abuts against the inner wall of the connected pipe, so that there is a great friction between the inner support plate 22 and the inner wall of the pipe, which makes it easy for the chain structure to straighten.

[0035] Next, the traction motor 10 is turned on, which drives the winding roller 7 to rotate. The winding roller 7 begins to wind up the traction rope 8, which drives the plate a12 to move. The plate a12 pulls the ball b24 to move, causing the entire chain structure to gradually straighten. During the straightening process, the chain structure forms a rigid linear reference, constraining the coaxiality, radial offset, and angular deflection of the pipes to be connected, forcing the central axes of the two pipes to coincide, and completing precise alignment. Then, the motor b30 is turned on again to drive the roller b31 to rotate. Since the ball a18 is fixed inside the pipe that has been welded and the vehicle body 1 is also in a fixed state, the entire chain structure is in a fixed state. At this time, the rotation of the roller b31 will push the pipe to be connected to move, so that the pipe to be connected and the pipe that has been welded can be connected. There is no need to use a crane or other tools to pre-align the pipes, which reduces the requirements for the initial position between the pipes and thus reduces the difficulty of pipe connection.

[0036] After the pipes are aligned, when welding the pipe joints is required, motor B30 is first started, causing roller B31 to rotate and drive the pipes to be welded towards the welding mechanism. The pipes to be welded move to the inside of the moving ring 13. Then, telescopic component D15 is activated, which drives the moving part D to move, so that the roller D contacts the outer surface of the pipe to be welded. Then, motor B30 drives roller B31 to rotate again, so that the pipe to be welded, carrying the welding structure, moves towards the pipe that has already been welded until it is connected. Then, motor D34 is activated, which drives roller D33 to rotate, causing the moving ring 13 to move on the pipe to be welded, and then driving the laser welding head 23 to move to above the joint. Simultaneously, motor E16 is activated when the laser welding head 23 is activated. Motor E16 drives the gear ring 14 to rotate, which in turn drives the laser welding head 23 to rotate, realizing the welding function of the joint. This eliminates the need for workers to hold welding tools, reducing workload and improving welding efficiency.

[0037] After welding is completed, the screw 6 is rotated by the turntable to move the drill rod 5 upward, releasing the limit of the vehicle body 1. Then, the moving part a drives the vehicle body 1 to move toward the pipe until one end of the pipe is inside the vehicle body 1. Then, the motor d34 is turned on again to make the roller d33 rotate, thereby driving the moving ring 13 to move toward the vehicle body 1 until the slider b on the moving ring 13 slides back to the inside of the groove 101 of the vehicle body 1, thus realizing the reset of the welding mechanism.

[0038] After the welding mechanism is reset, the workers can bring in the support blocks to support and fix the pipeline. Then, they can open the telescopic component a25, move the inner support plate 22 away from the inner wall of the pipeline, and simultaneously open the telescopic components b26 and c32, so that the moving parts b and c are close to the inner wall of the pipeline. Finally, the moving part a drives the vehicle body 1 to continue moving forward, driving the entire chain structure to move. The above steps are repeated to perform the welding operation on the next pipeline to be docked.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A hydraulic internal alignment device for pipelines, characterized in that, include: The moving mechanism includes a vehicle body (1), a limiting part and a moving part a; the moving part a is located at the bottom end of the vehicle body (1); The limiting part is located on the vehicle body (1); The traction mechanism includes a traction motor (10), a take-up roller (7), a traction rope (8), and a plate a (12); the take-up roller (7) is rotatably mounted on the vehicle body (1); the traction motor (10) is mounted on the vehicle body (1) and is connected to the take-up roller (7) for transmission; the traction rope (8) is wound around the take-up roller (7) and connected to the plate a (12); the vehicle body (1) is U-shaped, and a groove (101) is provided on the inner wall of the vehicle body (1); the plate a (12) is slidably connected to the groove (101) through a slider a; The docking mechanism includes sphere a (18), sphere b (24), chain links, telescopic component a (25), inner support plate (22), moving part b, and moving part c; multiple spheres b (24) are provided and connected in series by chain links to form a chain structure; sphere a (18) is connected to the outermost sphere b (24) through a chain link; the other end of sphere b (24) is detachably connected to plate a (12); sphere b (24) is provided with symmetrical transition grooves and circumferentially distributed grooves a. The moving part b is located inside the groove a; the sphere a (18) is provided with a transfer groove and a circumferentially distributed groove b; the moving part c is located inside the groove b; the sphere a (18) is provided with a groove c between adjacent grooves b; the telescopic part a (25) is located inside the groove c and connected to the inner support plate (22); the chain link includes a rod a (28) and a transfer ball (27); two transfer balls (27) are provided and connected to both ends of the rod a (28); the transfer ball (27) is movably connected to the transfer groove; A welding mechanism, which is mounted on the vehicle body (1), is used for laser welding of pipes.

2. A pipeline hydraulic internal alignment device according to claim 1, characterized in that, The moving part a includes a U-shaped block a (2), a roller a (4) and a motor a (3); the U-shaped block a (2) is connected to the bottom of the vehicle body (1); the roller a (4) is rotatably located inside the U-shaped block; the motor a (3) is located on the U-shaped block a (2) and is connected to the roller a (4) for transmission.

3. A pipeline hydraulic internal alignment device according to claim 1, characterized in that, The limiting part includes a screw (6), a drill rod (5) and a threaded cylinder; the threaded cylinder is connected through the vehicle body (1); the screw (6) is threadedly connected to the threaded cylinder; the bottom end of the screw (6) is connected to the drill rod (5); and a turntable is connected to the top end of the screw (6).

4. A pipeline hydraulic internal alignment device according to claim 1, characterized in that, The output end of the traction motor (10) is connected to gear a (11); one end of the take-up roller (7) is connected to gear b (9); gear b (9) meshes with gear a (11).

5. A hydraulic internal alignment device for pipelines according to claim 1, characterized in that, The moving part b includes a telescopic component b (26), a U-shaped block b (29), a roller b (31) and a motor b (30); the telescopic component b (26) is located inside the groove a and connected to the U-shaped block b (29); the roller b (31) is rotatably located inside the U-shaped block b (29); the motor b (30) is located on the U-shaped block b (29) and is connected to the roller b (31) for transmission.

6. A pipeline hydraulic internal alignment device according to claim 1, characterized in that, The moving part c includes a telescopic component c (32), a U-shaped block c (19), a roller c (21), and a motor c (20); the telescopic component c (32) is located inside the groove b and connected to the U-shaped block c (19); the roller c (21) is rotatably located inside the U-shaped block c (19); the motor c (20) is located on the U-shaped block c (19) and is connected to the roller c (21) for transmission.

7. A hydraulic internal alignment device for pipelines according to claim 1, characterized in that, The welding mechanism includes a moving ring (13), a telescopic component d (15), a moving part d, a motor e (16), a gear ring (14), and a laser welding head (23); the moving ring (13) is slidably connected to the slide groove (101) of the vehicle body (1) through a slider b; the telescopic component d (15) is provided in multiple sets and is circumferentially distributed on the moving ring (13); the telescopic component d (15) is connected to the moving part d; the gear ring (14) is rotatably connected to the moving ring (13); the motor e (16) is provided on the moving ring (13) and its output end is connected to a gear c (17) that meshes with the gear ring (14); the laser welding head (23) is provided on the gear ring (14).

8. A pipeline hydraulic internal alignment device according to claim 7, characterized in that, The moving part d includes a motor d (34), a U-shaped block d and a roller d (33); the U-shaped block d is connected to the telescopic component d (15); the roller d (33) is rotatably located inside the U-shaped block d; the motor d (34) is located on the U-shaped block d and is connected to the roller d (33) for transmission.

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