Laser welding equipment for pipeline

Abstract

The invention discloses laser welding equipment for pipelines, which belongs to the technical field of laser welding, and comprises a walking part, a wire accommodating part is mounted on the walking part, the wire accommodating part is driven by the walking part to take up or pay off, the wire accommodating part is connected with a moving control part, and a welding detection part is mounted on the walking part. The two pipelines are welded through the welding detection part, flaw detection is conducted on the welding seam, the pipe clamping part is installed on the walking part, the wire containing part is controlled to be locked and unlocked through the pipe clamping part, and control and power supply are conducted on the walking part and the welding detection part through the movable control part and the wire containing part. Therefore, a long power supply wire is not needed, the wire harness is automatically unwound and wound along with forward and reverse movement of equipment, manual traction and carding are not needed, friction collision and continuous pulling between the wire harness and the ground, a pipeline or an obstacle are avoided, the risks of damage and electric leakage of an insulating layer are greatly reduced, the service life of the wire harness is prolonged, and frequent replacement of the wire is not needed.

Description

Technical Field

[0001] This invention relates to a laser welding device for pipelines, belonging to the field of laser welding technology. Background Technology

[0002] Laser welding is a highly efficient and precise welding technology that uses a high-energy-density laser beam as a heat source. By focusing the laser beam, energy is concentrated at the weld joint, causing the materials to melt rapidly and form a strong weld. This technology has significant advantages such as concentrated energy, fast welding speed, high weld quality, and small heat-affected zone. It can adapt to the welding needs of various commonly used pipe materials such as carbon steel, stainless steel, and aluminum alloys. It effectively solves the problems of insufficient weld strength, large deformation, and low work efficiency that exist in traditional welding methods (such as arc welding). Therefore, it has been widely used in pipeline connection operations in the fields of petrochemical, municipal pipeline networks, and industrial pipelines, becoming a key technical means to improve pipeline welding quality and construction efficiency.

[0003] However, current pipeline laser welding equipment still suffers from significant wire loss during actual operation, hindering its operational stability and economic efficiency. Specifically, the equipment relies on a continuous and stable power supply. Pipeline welding operations are often characterized by high mobility and a wide operating range. To ensure continuous power supply, long power cables are typically required to connect the power source and the welding equipment. When adjusting the equipment's position or moving it during construction, manual pulling and manipulating of the cables is necessary, increasing labor input and the complexity of the process. Furthermore, the cables are prone to friction and collision with the ground, construction site components, or other obstacles, leading to insulation damage and potential leakage risks. More critically, the equipment needs to move in a circular motion around the pipeline to complete the weld. This movement exerts continuous tension on the power cables, causing them to remain in close contact with the pipeline surface and rub against it. This further exacerbates insulation wear, significantly shortening cable lifespan and increasing the risk of leakage and accidents. The above situation leads to the need to frequently replace the power supply wires during the operation, which increases the construction cost and may also interrupt the welding process due to wire replacement, affecting the overall construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a laser welding device for pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Compared to existing technologies, this invention provides a laser welding device for pipelines, including a traveling unit with a wire feeding unit mounted on it. The traveling unit drives the wire feeding unit to feed or unfeed wire. The wire feeding unit is connected to a movement control unit. A welding probe is mounted on the traveling unit, which welds two pipelines and inspects the weld seam. A pipe clamping unit is mounted on the traveling unit, which controls the locking and unlocking of the wire feeding unit. The movement control unit and the wire feeding unit control and power the traveling unit and the welding probe.

[0006] Furthermore, the traveling unit includes a trolley body and two traveling shafts. Two circular holes are provided on each of the two opposite sides of the trolley body. The traveling shafts are rotatably connected to the inner side of the circular holes. Two traveling wheels are fixed on the outer periphery of the traveling shafts. A motor frame is fixed on the inner wall of the trolley body. A motor is fixed on the motor frame. A reduction shaft is rotatably connected to one side of the motor frame. The output shaft of the motor is connected to the reduction shaft through gear transmission. The reduction shaft is connected to the first traveling shaft through gear transmission. A cover plate is fixed on the upper side of the trolley body.

[0007] Furthermore, the wire feeding section includes a take-up roller, a through hole is provided on one side of the trolley body, the take-up roller is rotatably connected in the through hole, a connecting seat is fixed on the bottom inner wall of the trolley body, a conductive slip ring is fixed on one side of the connecting seat, the take-up roller is fixed inside the conductive slip ring, a terminal block is fixed on the other side of the connecting seat, the motor is electrically connected to the terminal block through a wire, the terminal block is electrically connected to the conductive slip ring through a wire, and the take-up roller is connected to the first traveling shaft through a synchronous belt and a synchronous pulley.

[0008] Furthermore, an extension arm is fixed to the outer wall of the vehicle body, and a brush is fixed to the lower top of the extension arm.

[0009] Furthermore, the mobile control unit includes a mobile vehicle with several wheels rotatably connected to its bottom. A battery is fixed inside the mobile vehicle, and a control unit is fixed to the top of the mobile vehicle. The control unit and the battery are electrically connected via wires. A wire harness is electrically connected to the control unit. The wire harness is wound on a take-up roller. The take-up roller has three through holes, and the wire harness is located in the through holes. One end of the wire harness is electrically connected to a conductive slip ring.

[0010] Furthermore, the welding probe includes a laser welding machine, which includes a welding host and a laser welding head. The welding host is fixed on the cover plate and electrically connected to a terminal block via wires. A guide hole is provided on one side of the trolley body, and an adjusting arm is slidably connected to the inner side of the guide hole. A first electric telescopic push rod is fixed on the inner wall of the trolley body, and the shaft end of the first electric telescopic push rod is fixed on the adjusting arm. The laser welding head is mounted on the adjusting arm, and a vision sensor is fixed on the adjusting arm. A lifting arm is slidably connected to the adjusting arm, and a flaw detector is fixed on the lifting arm. A second electric telescopic push rod is fixed on the adjusting arm, and the shaft end of the second electric telescopic push rod is fixed on the lifting arm. The first electric telescopic push rod, the second electric telescopic push rod, the vision sensor, and the flaw detector are all electrically connected to a terminal block via wires. A wiring hole is provided on one side of the trolley body.

[0011] Furthermore, the adjusting arm is provided with a mounting hole, and the laser welding head is slidably inserted into the inner side of the mounting hole. The adjusting arm is provided with a first threaded hole, and a locking bolt is threadedly connected to the inner side of the first threaded hole. One end of the locking bolt abuts against the laser welding head.

[0012] Furthermore, the clamping part includes a connecting arm, which is slidably connected to the outer wall of the trolley body. The connecting arm is provided with an adjustment hole and a third threaded hole. A clamping arm slides inside the adjustment hole. Several clamping wheels are rotatably connected to the clamping arm. A connecting block is slidably sleeved on the outer periphery of the clamping arm. The connecting block is provided with several second threaded holes and a fourth threaded hole. A positioning bolt is threadedly connected to the inner side of the second threaded hole. One end of the positioning bolt abuts against the outer wall of the clamping arm. A clamping bolt is threadedly connected to the inner side of the third threaded hole. The clamping bolt is threadedly connected to the fourth threaded hole.

[0013] Furthermore, a limit plate is fixed on one side of the connecting arm, and a limit hole is provided on one side of the trolley body. The limit plate slides inside the limit hole. A tension spring is fixed between the limit plate and the motor frame. A brake frame is fixed on the side of the limit plate away from the tension spring. A brake pad is fixed on the inner side of the brake frame. A wear-resistant ring is fixed on the outer periphery of the first traveling shaft. The brake pad matches the wear-resistant ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up a mobile control unit, as well as a wire feeding unit and a walking unit that are linked to each other for simultaneous winding and unwinding, the present invention eliminates the need for long power supply wires. Moreover, the wire harness is automatically unwound and wound up as the equipment moves in the forward and reverse directions, eliminating the need for manual pulling and combing. This avoids friction and collision between the wire harness and the ground, pipes or obstacles, as well as continuous pulling, which greatly reduces the risk of insulation layer damage and leakage, extends the service life of the wire harness, eliminates the need for frequent wire replacement, reduces construction costs, ensures continuous welding operations, and improves operational stability and economy.

[0015] (2) This invention integrates five major functional modules: walking, clamping, welding, flaw detection and cable management. It can complete the entire process from positioning and welding to quality inspection in one go. It is centrally controlled by the mobile control unit, realizing multi-purpose use of one machine. It avoids the cumbersome process of rotating multiple equipment and multiple positioning in traditional operations, and greatly shortens the cycle of pipeline welding construction.

[0016] (3) The present invention has automatic locking and automatic unlocking functions. In the non-operating state, after the clamping part is unlocked, the tension spring drives the brake pad to fit tightly with the wear ring of the traveling shaft, locking the traveling shaft and fixing the take-up roller, avoiding the accidental rotation of the take-up roller that causes the wire harness to become loose and tangled, ensuring that the wire harness is neatly stored, reducing the time spent on combing before subsequent operations, and further improving the convenience of operation. In operation, the clamping part can automatically unlock when clamping the pipe, making it easy to use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a side perspective view of the present invention; Figure 2 The invention proposed Figure 1 A magnified schematic diagram of a portion of area A in the middle; Figure 3 The invention proposed Figure 1 A magnified schematic diagram of a portion of region B in the middle section; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention with partial side cross-section; Figure 5 The invention proposed Figure 4 A magnified schematic diagram of a portion of the C region; Figure 6 This is a schematic diagram of the front partial cross-section of the three-dimensional structure of the present invention; Figure 7 This is a schematic diagram of the front partial section isometric view of the structure of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the back part of the present invention.

[0019] In the diagram: 1. Car body; 2. Traveling shaft; 3. Motor; 4. Take-up roller; 5. Connecting seat; 6. Conductive slip ring; 7. Moving car; 8. Control unit; 9. Wiring harness; 10. Welding host; 11. Laser welding head; 12. Adjusting arm; 13. First electric telescopic push rod; 14. Vision sensor; 15. Lifting arm; 16. Flaw detector head; 17. Second electric telescopic push rod; 18. Connecting arm; 19. Pipe clamping arm; 20. Pipe clamping wheel; 21. Connecting block; 22. Clamping bolt; 23. Limiting plate; 24. Tension spring; 25. Brake bracket; 26. Brake pad; 27. Wear ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 - Figure 8 The present invention provides a technical solution: A laser welding device for pipelines mainly includes a mobile control unit, a walking unit, a wire feeding unit, a welding probe unit, and a pipe clamping unit. This device is particularly suitable for welding and inspecting circumferential seams in pipelines. It can move autonomously on the pipeline surface and integrates functions such as welding, flaw detection, wire feeding and winding, and clamping and fixing.

[0022] The mobile control unit provides power and control for the equipment. The mobile control unit includes a mobile vehicle 7, which has several wheels rotatably connected to its bottom for easy on-site movement.

[0023] A battery is fixed inside the mobile vehicle 7, which supplies power to the entire set of equipment.

[0024] The top of the mobile vehicle 7 is fixed with an integrated control unit 8. The integrated control unit 8 is electrically connected to the battery via wires. A wire harness 9 is electrically connected to the integrated control unit 8. The integrated control unit 8 has an integrated control interface, which can set welding parameters, control the walking speed, adjust the position of the welding torch, and start and stop flaw detection. It can control and supply power to the walking unit and the welding and detection unit through the mobile control unit and the wire harness unit.

[0025] The inner side of the mobile vehicle 7 is fixed with a partition, and the outer wall of the mobile vehicle 7 is fixed with a pusher. The partition separates the battery from other components, and the pusher makes it easy for the operator to push the mobile vehicle 7 to move with the traveling unit.

[0026] The traveling part includes a trolley body 1 and two traveling shafts 2. The bottom of the trolley body 1 has an arc-shaped structure. Two round holes are provided on the two opposite sides of the trolley body 1. The traveling shafts 2 are rotatably connected to the inside of the round holes. Two traveling wheels are fixed on the outer circumference of the traveling shafts 2. Anti-slip rings are fixed on the outer circumference of the traveling wheels to increase the friction with the pipe surface and prevent slippage.

[0027] A motor frame is fixed on the inner wall of the trolley body 1, and a motor 3 is fixed on the motor frame. A reduction shaft is rotatably connected to one side of the motor frame. The output shaft of the motor 3 is connected to the reduction shaft through gear transmission. The reduction shaft is also connected to the first traveling shaft 2 through gear transmission. After the motor 3 is connected to an external power source and turned on, the output shaft drives the reduction shaft through gear transmission. The reduction shaft then drives the first traveling shaft 2 to rotate through gear transmission, thereby driving the traveling wheels to rotate, so as to realize the smooth movement of the trolley body 1 along the pipeline. The reduction transmission design reduces the moving speed and improves the accuracy of welding and flaw detection.

[0028] A cover plate is fixed to the upper side of the trolley body 1. The cover plate has a cable routing hole and a handle frame is fixed to the cover plate. A handle is fixed to the handle frame, which facilitates the handling of the equipment.

[0029] The wire feeding section is installed on the traveling section and connected to the mobile control section. The wire feeding section realizes the automatic winding and unwinding of the wire harness 9, and is linked with the traveling section to ensure circuit continuity. The wire feeding section includes a take-up roller 4, which is connected to the first traveling shaft 2 through a synchronous belt and synchronous pulley. A through hole is provided on one side of the trolley body 1, and the take-up roller 4 is rotatably connected in the through hole. The wire harness 9 is coiled on the take-up roller 4. When the traveling section moves along the pipeline, the traveling shaft 2 synchronously drives the take-up roller 4 to rotate. When the equipment moves forward, the take-up roller 4 unwinds the wire, and when it moves backward, the take-up roller 4 winds up the wire, realizing precise synchronization between the winding and unwinding of the wire harness 9 and the traveling action, avoiding the wire harness dragging or tangling. Therefore, the wire feeding section can be driven by the traveling section to wind up or unwind the wire.

[0030] An extension arm is fixed to the outer wall of the carriage 1. A brush is fixed to the lower top of the extension arm. The brush contacts the wire harness 9. The brush can clean impurities on the surface of the wire harness and ensure that the wire harness 9 can be tightly wound on the take-up roller 4.

[0031] A connecting seat 5 is fixed on the bottom inner wall of the trolley body 1. A conductive slip ring 6 is fixed on one side of the connecting seat 5. The take-up roller 4 is provided with three wire holes. The wire harness 9 is located in the wire holes. One end of the wire harness 9 is electrically connected to the conductive slip ring 6. The conductive slip ring 6 can ensure that the circuit is continuously conductive when the take-up roller 4 rotates, without the risk of entanglement. The take-up roller 4 is fixed on the inner side of the conductive slip ring 6. Specifically, the conductive slip ring 6 includes an inner ring and an outer ring. The outer ring is fixed on the connecting seat 5, and the inner ring is fixed on the outer periphery of the take-up roller 4.

[0032] A terminal block is fixed on the other side of the connector 5. The motor 3 is electrically connected to the terminal block through a wire. The terminal block is electrically connected to the conductive slip ring 6 through a wire. The terminal block can be easily electrically connected to various devices.

[0033] The welding inspection unit is installed on the traveling unit. The welding inspection unit realizes the integrated operation of pipeline welding and weld flaw detection. The welding inspection unit includes a laser welding machine, which includes a welding host 10 and a laser welding head 11. The welding host 10 is connected to the laser welding head 11. The welding host 10 is fixed on the cover plate. The welding host 10 is electrically connected to the terminal block through a wire. A guide hole is provided on one side of the trolley body 1. An adjusting arm 12 is slidably connected to the inside of the guide hole. The laser welding head 11 is installed on the adjusting arm 12. The adjusting arm 12 can be moved and adjusted to meet the requirements of subsequent weld alignment. When the traveling unit drives the equipment to move along the pipeline, the laser welding head 11 continues to weld, thus welding the two pipelines together.

[0034] The core principle of a laser welding machine is that the welding host 10 has a built-in laser (such as a fiber laser or a CO2 laser), which generates a monochromatic, directional laser beam through an electrically excited medium. The laser beam is transmitted to the laser welding head 11 via an internal optical path, and then focused into an extremely small spot (with a diameter of micrometers to millimeters) by a focusing lens inside the welding head, forming a 10-meter laser beam. 4 -10 6 A high-energy-density heat source with W / cm², after focusing, irradiates the weld joint of the pipe, instantly heating the base material to the melting temperature to form a molten pool. The laser beam moves along the pipe with the carriage 1, causing the molten pool to extend continuously. At the same time, the heat conduction of the base material causes the molten metal at the edge of the molten pool to cool and solidify rapidly, forming a continuous and dense metallurgical bond with the base material, achieving a firm connection between the two pipes. Furthermore, the rapid heating and cooling characteristics can reduce the heat-affected zone and prevent deformation or performance degradation of the pipe base material.

[0035] The adjusting arm 12 is provided with a mounting hole, and the laser welding head 11 is slidably inserted into the inner side of the mounting hole. The adjusting arm 12 is provided with a first threaded hole, and a locking bolt is connected to the inner side of the first threaded hole by a thread. One end of the locking bolt abuts against the laser welding head 11, and the laser welding head 11 is fixed by the locking bolt, which can be quickly disassembled or its position finely adjusted.

[0036] A first electric telescopic push rod 13 is fixed on the inner wall of the trolley body 1. A stabilizing frame is fixed on the inner side of the trolley body 1. The first electric telescopic push rod 13 is fixed on the stabilizing frame. The shaft end of the first electric telescopic push rod 13 is fixed on the adjusting arm 12. The shaft end of the first electric telescopic push rod 13 can drive the adjusting arm 12 to move back and forth, thereby realizing the adjustment of the distance between the laser welding head 11 and the pipe weld.

[0037] A vision sensor 14 is fixed on the adjusting arm 12. The vision sensor 14 can capture the position of the pipe weld in real time and feed it back to the control unit 8, providing a basis for welding positioning.

[0038] A lifting arm 15 is slidably connected to the adjusting arm 12. The two sides of the adjusting arm 12 that are far apart are provided with sliding grooves. The lifting arm 15 slides in the sliding grooves. A flaw detector 16 is fixed on the lifting arm 15. The flaw detector 16 is set at an angle. A second electric telescopic push rod 17 is fixed on the adjusting arm 12. The shaft end of the second electric telescopic push rod 17 is fixed on the lifting arm 15. The adjusting arm 12 is provided with a receiving hole. The output shaft of the second electric telescopic push rod 17 is located in the receiving hole. The shaft end of the second electric telescopic push rod 17 drives the lifting arm 15 to move up and down, adjusting the height of the flaw detector 16 to ensure that the flaw detector 16 can be attached to the weld for accurate inspection of the weld.

[0039] The flaw detector head 16 is an ultrasonic flaw detector head, which works based on the principle of ultrasonic propagation and reflection: ultrasonic waves will propagate in a straight line in a uniform medium (pipe weld and base material). When it encounters defects such as cracks, pores, and inclusions inside the weld, the ultrasonic waves will be reflected, refracted or scattered. The flaw detector head 16 integrates an ultrasonic transmitter and a receiver. The tilted setting can make the ultrasonic waves enter the inside of the weld at the optimal angle to ensure that the entire cross section of the weld is covered.

[0040] During flaw detection, the transmitter of the ultrasonic flaw detector head 16 emits high-frequency ultrasonic waves into the weld. After the ultrasonic waves penetrate the base material of the weld, if there are no defects in the weld, the ultrasonic waves will penetrate to the other side of the pipe or propagate along the base material, and the receiver will receive a weak transmitted signal. If there are defects in the weld, the defect interface will reflect the ultrasonic waves, and the receiver will receive a stronger reflected signal. The flaw detector head 16 converts the ultrasonic signal into an electrical signal, which is transmitted to the control unit 8 through the wiring harness 9 to inform the operator.

[0041] The first electric telescopic push rod 13, the second electric telescopic push rod 17, the vision sensor 14, and the flaw detector 16 are all electrically connected to the wiring terminal via wires, and a wiring hole is provided on one side of the trolley body 1.

[0042] When in use, the trolley body 1 needs to be moved forward along the pipe to perform welding. At this time, the wire harness 9 will be wrapped around the pipe. Then, the trolley body 1 needs to be controlled to move backward along the pipe to perform flaw detection. After the flaw detection is completed, the wire harness 9 will also be stored. The two pipes can be welded through the welding probe and the weld can be inspected.

[0043] The clamping part is installed on the traveling part. The clamping part realizes the fixing and release of the equipment on the pipeline, and at the same time controls the locking and unlocking of the traveling part and the wire feeding part. The clamping part includes a connecting arm 18, which is slidably connected to the outer wall of the trolley body 1. The connecting arm 18 is provided with an adjustment hole and a third threaded hole. The clamping arm 19 slides inside the adjustment hole. The clamping arm 19 slides through the adjustment hole to adapt to pipelines of different diameters. Several clamping wheels 20 are rotatably connected to the clamping arm 19. The clamping wheels 20 can roll in contact with the pipeline to reduce the movement resistance of the equipment.

[0044] A connecting block 21 is slidably sleeved on the outer periphery of the pipe clamping arm 19. The connecting block 21 is provided with several second threaded holes and one fourth threaded hole. The inner side of the second threaded hole is connected to a positioning bolt by a thread, and one end of the positioning bolt abuts against the outer wall of the pipe clamping arm 19. The inner side of the third threaded hole is connected to a clamping bolt 22 by a thread, and the clamping bolt 22 is connected to the fourth threaded hole by a thread. By tightening the clamping bolt 22, the relative position of the connecting arm 18 and the pipe clamping arm 19 is adjusted to clamp the pipe, so that the trolley body 1 can move stably along the pipe.

[0045] A limiting plate 23 is fixed on one side of the connecting arm 18, and a limiting hole is provided on one side of the trolley body 1. The limiting plate 23 slides inside the limiting hole. A tension spring 24 is fixed between the limiting plate 23 and the motor frame. A brake frame 25 is fixed on the side of the limiting plate 23 away from the tension spring 24. The brake frame 25 has a U-shaped structure. A brake pad 26 is fixed on the inner side of the brake frame 25. A wear-resistant ring 27 is fixed on the outer circumference of the first traveling shaft 2. The brake pad 26 matches the wear-resistant ring 27 and can contact the wear-resistant ring 27. When the clamping part is clamped on the pipe, the connecting arm 18 drives the limiting plate 23 to move away from the motor frame, stretching the tension spring 24. At this time, the brake pad 26 on the brake frame 25 separates from the wear-resistant ring 27 on the outer circumference of the traveling shaft 2, and the traveling shaft 2 can rotate normally. The trolley body 1 can travel along the pipe to perform welding or flaw detection operations. The winding roller 4 synchronously winds up and unwinds the wire with the traveling shaft 2.

[0046] When the operation is completed, the clamping bolt 22 needs to be loosened to release the clamp. Then the tension spring 24 retracts and resets, driving the limit plate 23 and the connecting arm 18 back to the initial position. The brake pad 26 and the wear-resistant ring 27 are in close contact, locking the travel shaft 2, thereby preventing the winding roller 4 from rotating accidentally and causing the wire harness 9 to loosen. This ensures the stability of the wire harness storage in non-operational states. The locking and unlocking of the wire storage part can be controlled by the clamping tube part.

[0047] The workflow of this embodiment is as follows: Take the trolley 1 out of the mobile trolley 7 and place it at the matching point of the two pipes to be welded. Adjust the position of the equipment by using the handle, adjust the position of the connecting block 21, fix it with the positioning bolt, tighten the clamping bolt 22, so that the pipe clamping wheel 20 and the traveling wheel are close to the pipe to complete the stable clamping. At this time, the tension spring 24 is stretched, the brake pad 26 is separated from the wear ring 27, the traveling shaft 2 can rotate normally, ensure the circuit is conductive, check the connection status of each component, and the battery supplies power to the equipment.

[0048] By controlling the integrated machine 8 to activate the vision sensor 14, the position of the pipe weld is captured and fed back to the control system. The first electric telescopic push rod 13 is controlled to adjust the front and back position of the adjusting arm 12, and the laser welding head 11 is moved to the top of the weld. The locking bolt is tightened to fix it. The flaw detection function is not activated, and the pre-welding debugging is completed.

[0049] By controlling the integrated machine 8 to start the motor 3 to rotate forward, the traveling part moves forward along the pipeline, synchronously driving the take-up roller 4 to rotate forward, and the wire harness 9 moves with the equipment to lay out the wire and wrap around the pipeline once; start the laser welding machine, and the welding host 10 drives the laser welding head 11 to continuously weld the pipeline weld. The operator monitors the welding status by controlling the integrated machine 8 until the equipment moves forward once to complete the full circumference welding. During the welding, the first electric telescopic push rod 13 is used to keep the laser welding head 11 aligned with the weld.

[0050] After welding is completed, the motor 3 is reversed by the control unit 8, and the flaw detection mode is switched to and the welding function is turned off. The traveling part moves in reverse along the pipeline, and the winding roller 4 is driven to rotate in reverse. The wire harness 9 is gradually wound up and stored. The second electric telescopic push rod 17 is controlled to adjust the height of the lifting arm 15 so that the flaw detection head 16 is aligned with the weld or attached to the weld to detect the weld quality in real time. The detection data is transmitted to the control unit 8 through the wire harness 9 until the equipment moves in reverse one circle to complete the full circumference flaw detection.

[0051] After the flaw detection is completed, the motor 3 and the flaw detection function are turned off by controlling the integrated machine 8; the clamping bolt 22 is loosened, the clamping part is unlocked, the tension spring 24 is retracted and reset, the brake pad 26 and the wear ring 27 contact and lock the traveling shaft 2 to prevent the winding roller 4 from rotating accidentally and causing the wire harness to loosen. Then the trolley body 1 is placed in the mobile car 7 and the mobile car 7 is pushed to the next work location.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for pipes, comprising a traveling unit, characterized in that, The traveling unit is equipped with a wire take-up unit, which drives the wire take-up or wire release. The wire take-up unit is connected to a movement control unit. The traveling unit is equipped with a welding probe, which welds two pipes and performs flaw detection on the weld. The traveling unit is equipped with a pipe clamp, which controls the locking and unlocking of the wire take-up unit. The movement control unit and the wire take-up unit control and supply power to the traveling unit and the welding probe.

2. The laser welding equipment for pipelines according to claim 1, characterized in that, The traveling part includes a small car body (1) and two traveling shafts (2). Two round holes are provided on the two sides of the small car body (1) that are far apart. The traveling shafts (2) are rotatably connected to the inside of the round holes. Two traveling wheels are fixed on the outer periphery of the traveling shafts (2). A motor frame is fixed on the inner wall of the small car body (1). A motor (3) is fixed on the motor frame. A reduction shaft is rotatably connected to one side of the motor frame. The output shaft of the motor (3) is connected to the reduction shaft through gear transmission. The reduction shaft is connected to the first traveling shaft (2) through gear transmission. A cover plate is fixed on the upper side of the small car body (1).

3. The laser welding equipment for pipelines according to claim 2, characterized in that, The winding section includes a take-up roller (4). A through hole is provided on one side of the carriage body (1). The take-up roller (4) is rotatably connected in the through hole. A connecting seat (5) is fixed on the bottom inner wall of the carriage body (1). A conductive slip ring (6) is fixed on one side of the connecting seat (5). The take-up roller (4) is fixed inside the conductive slip ring (6). A terminal block is fixed on the other side of the connecting seat (5). The motor (3) is electrically connected to the terminal block through a wire. The terminal block and the conductive slip ring (6) are electrically connected through a wire. The take-up roller (4) and the first traveling shaft (2) are connected by a synchronous belt and a synchronous pulley.

4. The laser welding equipment for pipelines according to claim 3, characterized in that, An extension arm is fixed to the outer wall of the vehicle body (1), and a brush is fixed to the lower side of the top of the extension arm.

5. A laser welding device for pipelines according to claim 3, characterized in that, The mobile control unit includes a mobile vehicle (7), with several wheels rotatably connected to the bottom of the mobile vehicle (7). A storage battery is fixed inside the mobile vehicle (7), and an integrated control unit (8) is fixed to the top of the mobile vehicle (7). The integrated control unit (8) is electrically connected to the storage battery via wires. A wire harness (9) is electrically connected to the integrated control unit (8). The wire harness (9) is coiled on a take-up roller (4). The take-up roller (4) has three wire holes, and the wire harness (9) is located inside the wire holes. One end of the wire harness (9) is electrically connected to a conductive slip ring (6).

6. A laser welding device for pipelines according to claim 3, characterized in that, The welding probe includes a laser welding machine, which includes a welding host (10) and a laser welding head (11). The welding host (10) is fixed on the cover plate and is electrically connected to the terminal block via a wire. A guide hole is provided on one side of the trolley body (1), and an adjusting arm (12) is slidably connected to the inside of the guide hole. A first electric telescopic push rod (13) is fixed on the inner wall of the trolley body (1), and the shaft end of the first electric telescopic push rod (13) is fixed on the adjusting arm (12). The laser welding head (11) is mounted on the adjusting arm (12). A vision sensor (14) is fixed on the adjusting arm (12), a lifting arm (15) is slidably connected on the adjusting arm (12), a flaw detector (16) is fixed on the lifting arm (15), a second electric telescopic push rod (17) is fixed on the adjusting arm (12), the shaft end of the second electric telescopic push rod (17) is fixed on the lifting arm (15), the first electric telescopic push rod (13), the second electric telescopic push rod (17), the vision sensor (14), and the flaw detector (16) are all electrically connected to the wiring terminal through wires, and a wiring hole is provided on one side of the trolley body (1).

7. A laser welding device for pipelines according to claim 6, characterized in that, The adjusting arm (12) is provided with a mounting hole, and the laser welding head (11) is slidably inserted into the inner side of the mounting hole. The adjusting arm (12) is provided with a first threaded hole, and a locking bolt is threadedly connected to the inner side of the first threaded hole. One end of the locking bolt abuts against the laser welding head (11).

8. A laser welding device for pipelines according to claim 2, characterized in that, The clamping part includes a connecting arm (18), which is slidably connected to the outer wall of the trolley body (1). The connecting arm (18) is provided with an adjustment hole and a third threaded hole. A clamping arm (19) is slidably connected to the inner side of the adjustment hole. Several clamping wheels (20) are rotatably connected to the clamping arm (19). A connecting block (21) is slidably sleeved on the outer periphery of the clamping arm (19). Several second threaded holes and a fourth threaded hole are provided on the connecting block (21). A positioning bolt is threadedly connected to the inner side of the second threaded hole. One end of the positioning bolt abuts against the outer wall of the clamping arm (19). A clamping bolt (22) is threadedly connected to the inner side of the third threaded hole. The clamping bolt (22) is threadedly connected to the fourth threaded hole.

9. A laser welding device for pipelines according to claim 8, characterized in that, A limiting plate (23) is fixed on one side of the connecting arm (18), and a limiting hole is provided on one side of the trolley body (1). The limiting plate (23) slides inside the limiting hole. A tension spring (24) is fixed between the limiting plate (23) and the motor frame. A brake frame (25) is fixed on the side of the limiting plate (23) away from the tension spring (24). A brake pad (26) is fixed on the inner side of the brake frame (25). A wear-resistant ring (27) is fixed on the outer periphery of the first traveling shaft (2). The brake pad (26) matches the wear-resistant ring (27).

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