Laser equipment for welding pipelines

Abstract

The present invention relates to the technical field of pipeline laser welding, and discloses a laser device for welding pipelines, including a welding table, a supporting leg fixedly installed at the bottom of the welding table, a rotating clamping mechanism arranged inside the welding table, a first welding pipe arranged at the top of the rotating clamping mechanism, a second welding pipe arranged at the top of the first welding pipe, a pipeline fixing mechanism arranged at the top of the welding table, and a welding mechanism arranged at the top of the welding table. The laser device for welding pipelines clamps and fixes the first welding pipe below by vertically placing the first welding pipe and the second welding pipe, and fits the second welding pipe with the first welding pipe by gravity, and clamps and fixes the second welding pipe with a roller to ensure the docking effect of the two welding pipes, and at the same time, the laser welding head rotates around the joint to weld, and rotates with the welding pipe, thereby improving the stability during welding and ensuring accurate welding positioning.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline laser welding, in particular to a laser device for welding pipelines. Background Art

[0002] Laser welding uses high-energy laser pulses to locally heat a small area of ​​a material. The energy from the laser radiation diffuses into the material through heat conduction, melting the material to form a specific molten pool. Currently, laser welding is commonly used to connect two pipes.

[0003] According to the description in a disclosed laser equipment for welding pipes (authorization announcement number: CN 116140801 B), "an embodiment of the present invention discloses a laser equipment for welding pipes, which relates to the field of laser welding equipment and includes a frame, a support member, an X-axis transport member, an XX-axis transport member, a drive member and a laser welding member. The support member is used to support two pipes to be processed; the X-axis transport member is installed on the frame and connected to the support member, and is used to transport the support member along a first direction; the XX-axis transport member includes two sub-transport components symmetrically installed on the frame, and the transport directions of the two sub-transport components are opposite, and are used to transport two pipes to be processed along a second direction; the drive member is installed on the frame, and is used to push the pipes to be processed to the welding position after the two pipes to be processed are in a preset position, and can be used to drive the pipes to be processed to rotate; the laser welding member is installed on the frame, and is used to weld the two pipes to be processed in the welding position. The embodiment of the present invention effectively improves the welding efficiency of the pipes and reduces manual operations."

[0004] During use, the invention feeds two pipes to be welded from both sides, and then aligns the two pipes and performs rotation welding. The overall horizontal welding method is adopted. During actual welding, due to certain deviations in the sizes of the pipes, it is not convenient to align the joints of the pipes at both ends with the position of the welding head when loading them synchronously. Moreover, during welding, the pipes need to be rotated while being welded. However, at the beginning of welding, the connection strength of the two pipes is poor, which can easily cause misalignment during the rotation welding process. Secondly, harmful welding smoke is easily generated during the welding process, which can easily pollute the air. Therefore, it is necessary to invent a laser device for welding pipes to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a laser device for welding pipelines to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A laser device for welding pipes, comprising a welding table, wherein support legs are fixedly installed at the bottom of the welding table, a rotating clamping mechanism is provided inside the welding table, a first welding pipe is provided on the top of the rotating clamping mechanism, a second welding pipe is provided on the top of the first welding pipe, a pipe fixing mechanism is provided on the top of the welding table, and a welding mechanism is provided on the top of the welding table.

[0007] The rotary clamping mechanism includes a rotary assembly and a clamping assembly. The rotary assembly is arranged inside the welding table, and the clamping assembly is arranged inside the rotary assembly.

[0008] The welding mechanism includes a welding assembly and a purification assembly. The welding assembly is arranged on the top of the welding table and extends to the bottom. The purification assembly is arranged on the top of the welding table.

[0009] The pipe fixing mechanism includes a fixing column, which is fixedly installed on the top of the welding table, and a top plate is fixedly installed on the top of the fixing column, and a threaded column is fixedly installed between the bottom of the top plate and the top of the welding table, and a sliding frame is slidably installed on the outside of the fixing column, and a third motor is fixedly installed on the left side of the sliding frame, and a bidirectional screw is fixedly installed on the output end of the third motor, and a clamping frame is slidably installed on the inside of the sliding frame extending to the front, and a roller is provided on the inside of the clamping frame, and a fourth motor is fixedly installed on the top of the sliding frame, and a second gear is fixedly installed on the output end of the fourth motor, and a threaded gear sleeve is rotatably installed on the inside of the sliding frame, which is convenient for adjusting the clamping position according to the height of the welding pipe and clamping and fixing the welding pipe.

[0010] Preferably, the threaded sleeve is threadedly mounted on the outside of the threaded column, and the second gear is engaged with the toothed structure on the outside of the threaded sleeve, so that the sliding frame can be driven by the threaded rack to slide and adjust on the outside of the fixed column.

[0011] Preferably, two sliding frames are provided, and two clamping frames are provided inside the two sliding frames, and the two clamping frames are respectively threadedly installed on the outside of the two ends of the bidirectional screw in opposite directions, so that the two clamping frames can slide synchronously in opposite directions.

[0012] Preferably, the rotating assembly includes a fixed box, which is fixedly installed inside the welding table, a rotating table is rotatably installed inside the fixed box, a fixed gear ring is fixedly installed on the bottom of the rotating table, a first motor is fixedly installed on the bottom inner wall of the fixed box, a first gear is fixedly installed on the output end of the first motor, and the first gear is meshed with the fixed gear ring, so that the welding pipe can be rotated, thereby cooperating with the laser welding head for welding.

[0013] Preferably, the clamping assembly includes a second motor, which is fixedly mounted on the bottom inner wall of the rotating table. A rotating plate is fixedly mounted on the output end of the second motor, and four connecting bent rods are rotatably mounted on the outside of the rotating plate. The four connecting bent rods are rotatably mounted with a clamping plate at one end away from the rotating plate to facilitate clamping and positioning of the welding pipe.

[0014] Preferably, four clamping plates are provided, and four sliding grooves are provided at the top of the rotating table and at corresponding positions of the four clamping plates. The four clamping plates are slidably installed inside the sliding grooves, so that the four clamping plates can slide and clamp synchronously.

[0015] Preferably, the welding assembly includes a sliding seat, which is slidably installed inside the welding table, a fifth motor is fixedly installed on the bottom of the sliding seat, a third gear is fixedly installed on the output end of the fifth motor, a half gear ring is fixedly installed on the bottom of the welding table, and the third gear is meshed with the half gear ring, a support frame is fixedly installed on the top of the sliding seat, a sixth motor is fixedly installed on the top of the support frame, a threaded rod is fixedly installed on the output end of the sixth motor, a sliding table is slidably installed inside the support frame, an electric telescopic rod is provided on the top of the sliding table, and a laser welding head is fixedly installed on the right side of the electric telescopic rod, which is convenient for adjusting the position of the laser welding head according to the seam of the welding pipe.

[0016] Preferably, a semicircular slide groove is opened inside the welding table, and the sliding seat is slidably installed inside the semicircular slide groove. Threaded holes are opened at corresponding positions of the sliding table and the threaded rod, and the threaded rod is threadedly installed inside the threaded hole, which is convenient for adjusting the position of the sliding table.

[0017] Preferably, the purification component includes a purification box, which is fixedly mounted on the top of the welding table, a fume hood is provided on the top of the laser welding head, a connecting pipe is fixedly installed between the fume hood and the purification box, a fume exhaust fan is provided inside the purification box, an installation box is movably installed inside the purification box, a cover plate is provided at the top of the purification box and at the corresponding position of the installation box, an activated carbon plate is plugged into the interior of the installation box, and a smoke exhaust pipe is fixedly installed on the right side of the purification box to facilitate filtering and purifying the welding smoke generated during the welding process to avoid polluting the environment.

[0018] Preferably, the connecting pipe is a flexible hose, and a through hole is provided on the left side of the purification box, and the connecting pipe is fixedly installed at the through hole, so that the welding smoke can be discharged into the interior of the purification box through the connecting pipe.

[0019] Compared with the prior art, the present invention provides a laser device for welding pipes, which has the following beneficial effects:

[0020] The laser equipment for welding pipes is provided with a rotating clamping mechanism, a pipe fixing mechanism and a welding mechanism. During use, the first welding pipe and the second welding pipe are placed vertically, the first welding pipe below is clamped and fixed, the gravity of the second welding pipe is used to make it fit with the first welding pipe, and the roller is used to clamp and fix it, thereby ensuring the butt connection effect of the two welding pipes. At the same time, the laser welding head rotates around the joint to weld and cooperates with the rotation of the welding pipe, thereby improving the stability of the welding process and ensuring accurate welding positioning.

[0021] The laser equipment for welding pipes is equipped with a rotating assembly and a clamping assembly. During use, the four clamping plates move synchronously to clamp and fix the bottom inner side of the first welded pipe and drive the first welded pipe to rotate. After the first welded pipe and the second welded pipe are half welded, the two welded pipes are driven to rotate and exchange positions, thereby changing the welding position and achieving continuous welding of the pipes.

[0022] The laser equipment for welding pipes has a pipe fixing mechanism. During use, the height of the sliding frame is adjusted to adjust the clamping position according to the length of the pipe. The pipe is clamped and fixed by rollers on the inner side of the clamping frame to ensure the stability of the pipe during rotation and avoid dislocation due to excessive resistance.

[0023] The laser equipment for welding pipes is equipped with a welding component. During use, the height of the laser welding head is adjusted so that it can be adjusted according to the joint position of the pipe. During welding, half of the pipe is welded first, and then the pipe is rotated to avoid misalignment during the synchronous rotation process. At the same time, the purification component is used to absorb and purify the welding smoke to prevent the welding smoke from polluting the environment and causing harm to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0025] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0026] Figure 2 This is a rear view structural diagram of the present invention;

[0027] Figure 3 This is a front cross-sectional schematic diagram of the rotary clamping mechanism of the present invention;

[0028] Figure 4 It is a front cross-sectional schematic diagram of the rotating platform and the connected mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the appearance structure of the clamping assembly of the present invention;

[0030] Figure 6 This is a schematic diagram of the appearance structure of the pipeline fixing mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the appearance and structure of the sliding frame and the connected mechanism of the present invention;

[0032] Figure 8 This is a rear structural diagram of the sliding frame and the connected mechanism of the present invention;

[0033] Figure 9 This is a schematic diagram of the appearance structure of the welding mechanism of the present invention;

[0034] Figure 10 This is a rear structural diagram of the sliding seat and the connected mechanism of the present invention;

[0035] Figure 11 This is a schematic diagram of the appearance and structure of the sliding platform and its connected mechanisms of the present invention;

[0036] Figure 12 This is a front cross-sectional view of the purification box and its connected mechanisms of the present invention;

[0037] Figure 13 This is a schematic diagram of an exploded cross-section of the installation box and its connected mechanisms of the present invention.

[0038] Figure: 1. Welding table; 2. Support legs; 3. Rotating clamping mechanism; 31. Rotating assembly; 311. Fixed box; 312. Rotating table; 313. Fixed ring gear; 314. First motor; 315. First gear; 32. Clamping assembly; 321. Second motor; 322. Rotating plate; 323. Connecting bent rod; 324. Clamping plate; 4. First welding pipe; 5. Second welding pipe; 6. Pipe fixing mechanism; 61. Fixed column; 62. Top plate; 63. Threaded column; 64. Sliding frame; 65. Third motor; 66. Bidirectional screw; 67. Clamping frame; 68. Roller; 69 , fourth motor; 610, second gear; 611, threaded gear sleeve; 7, welding mechanism; 71, welding assembly; 711, sliding seat; 712, fifth motor; 713, third gear; 714, half gear ring; 715, support frame; 716, sixth motor; 717, threaded rod; 718, sliding table; 719, electric telescopic rod; 7110, laser welding head; 72, purification assembly; 721, purification box; 722, smoke hood; 723, connecting pipe; 724, smoke exhaust fan; 725, installation box; 726, cover plate; 727, activated carbon plate; 728, exhaust pipe. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] Example 1:

[0042] See also Figure 1-13 The present invention provides a technical solution: a laser device for welding pipes, comprising a welding table 1, a supporting leg 2 fixedly installed at the bottom of the welding table 1, a rotating clamping mechanism 3 provided inside the welding table 1, a first welding pipe 4 provided on the top of the rotating clamping mechanism 3, a second welding pipe 5 provided on the top of the first welding pipe 4, a pipe fixing mechanism 6 provided on the top of the welding table 1, and a welding mechanism 7 provided on the top of the welding table 1.

[0043] The rotating clamping mechanism 3 includes a rotating assembly 31 and a clamping assembly 32 . The rotating assembly 31 is disposed inside the welding table 1 , and the clamping assembly 32 is disposed inside the rotating assembly 31 .

[0044] Furthermore, the rotating assembly 31 includes a fixed box 311, which is fixedly installed inside the welding table 1. A rotating table 312 is rotatably installed inside the fixed box 311, and a fixed gear ring 313 is fixedly installed at the bottom of the rotating table 312. A first motor 314 is fixedly installed on the bottom inner wall of the fixed box 311, and a first gear 315 is fixedly installed at the output end of the first motor 314, and the first gear 315 is meshed with the fixed gear ring 313, so that the welding pipe can be rotated, thereby cooperating with the laser welding head 7110 for welding.

[0045] Furthermore, the clamping assembly 32 includes a second motor 321, which is fixedly mounted on the bottom inner wall of the rotating table 312. A rotating plate 322 is fixedly mounted on the output end of the second motor 321. Four connecting bent rods 323 are rotatably mounted on the outside of the rotating plate 322. The four connecting bent rods 323 are rotatably mounted on one end away from the rotating plate 322 to facilitate clamping and positioning of the welding pipe.

[0046] Furthermore, four clamping plates 324 are provided, and four sliding grooves are opened at the top of the rotating table 312 and the corresponding positions of the four clamping plates 324. The four clamping plates 324 are respectively slidably installed inside the sliding grooves, so that the four clamping plates 324 can be synchronously slid and clamped.

[0047] Example 2:

[0048] See also Figures 1-13 , and combined with Example 1, it is further obtained that the pipe fixing mechanism 6 includes a fixing column 61, which is fixedly installed on the top of the welding table 1, and a top plate 62 is fixedly installed on the top of the fixing column 61, and a threaded column 63 is fixedly installed between the bottom of the top plate 62 and the top of the welding table 1, and a sliding frame 64 is slidably installed on the outside of the fixing column 61, and a third motor 65 is fixedly installed on the left side of the sliding frame 64, and a bidirectional screw 66 is fixedly installed on the output end of the third motor 65. The interior of the sliding frame 64 extends to the front and a clamping frame 67 is slidably installed, and a roller 68 is provided on the inner side of the clamping frame 67. A fourth motor 69 is fixedly installed on the top of the sliding frame 64, and a second gear 610 is fixedly installed on the output end of the fourth motor 69. A threaded tooth sleeve 611 is rotatably installed on the interior of the sliding frame 64, which is convenient for adjusting the clamping position according to the height of the welding pipe and clamping and fixing the welding pipe.

[0049] Furthermore, the threaded sleeve 611 is threadedly installed on the outside of the threaded column 63, and the second gear 610 is engaged with the toothed structure on the outside of the threaded sleeve 611, so that the sliding frame 64 can be driven to slide and adjust on the outside of the fixed column 61 through the threaded rack.

[0050] Furthermore, two sliding frames 64 are provided, and two clamping frames 67 are provided inside the two sliding frames 64, and the two clamping frames 67 are respectively threadedly installed on the outside of the two ends of the bidirectional screw 66 with opposite thread directions, so that the two clamping frames 67 can slide synchronously in opposite directions.

[0051] Example 3:

[0052] See also Figures 1-13 , and combined with Example 1 and Example 2, it is further obtained that the welding mechanism 7 includes a welding component 71 and a purification component 72, the welding component 71 is arranged on the top of the welding table 1 and extends to the bottom, and the purification component 72 is arranged on the top of the welding table 1.

[0053] Furthermore, the welding assembly 71 includes a sliding seat 711, which is slidably installed inside the welding table 1. A fifth motor 712 is fixedly installed on the bottom of the sliding seat 711, and a third gear 713 is fixedly installed on the output end of the fifth motor 712. A half gear ring 714 is fixedly installed on the bottom of the welding table 1, and the third gear 713 is engaged with the half gear ring 714. A support frame 715 is fixedly installed on the top of the sliding seat 711, and a sixth motor 716 is fixedly installed on the top of the support frame 715. A threaded rod 717 is fixedly installed on the output end of the sixth motor 716. A sliding table 718 is slidably installed inside the support frame 715. An electric telescopic rod 719 is provided on the top of the sliding table 718. A laser welding head 7110 is fixedly installed on the right side of the electric telescopic rod 719, which is convenient for adjusting the position of the laser welding head 7110 according to the joint of the welding pipe.

[0054] Furthermore, a semicircular slide groove is opened inside the welding table 1, and the sliding seat 711 is slidably installed inside the semicircular slide groove. Threaded holes are opened at the corresponding positions of the sliding table 718 and the threaded rod 717, and the threaded rod 717 is threadedly installed inside the threaded hole, which is convenient for adjusting the position of the sliding table 718.

[0055] Furthermore, the purification component 72 includes a purification box 721, which is fixedly installed on the top of the welding table 1. A fume hood 722 is provided on the top of the laser welding head 7110. A connecting pipe 723 is fixedly installed between the fume hood 722 and the purification box 721. A fume exhaust fan 724 is provided inside the purification box 721. An installation box 725 is movably installed inside the purification box 721. A cover plate 726 is provided at the corresponding position of the top of the purification box 721 and the installation box 725. An activated carbon plate 727 is inserted into the interior of the installation box 725. A smoke exhaust pipe 728 is fixedly installed on the right side of the purification box 721 to facilitate filtering and purifying the welding smoke generated during the welding process to avoid polluting the environment.

[0056] Furthermore, the connecting pipe 723 is a flexible hose, and a through hole is opened on the left side of the purification box 721, and the connecting pipe 723 is fixedly installed at the through hole, so that the welding smoke can be discharged into the interior of the purification box 721 through the connecting pipe 723.

[0057] In actual operation, when this device is used, the first welding tube 4 is first placed on the rotating table 312, and the four clamping plates 324 are located inside the bottom end of the first welding tube 4. Then, the second motor 321 drives the rotating plate 322 to rotate, so that the rotating plate 322 drives the four clamping plates 324 to slide outward synchronously through the connecting bent rod 323, so that the four clamping plates 324 clamp the bottom of the first welding tube 4 and position it at the center of the rotating table 312. Then, the fourth motor 69 below drives the second gear 610 to rotate, so that The second gear 610 drives the threaded sleeve 611 to rotate, so that the threaded sleeve 611 cooperates with the threaded column 63 to drive the sliding frame 64 to slide and adjust outside the fixed column 61, and adjust the position of the roller 68 to an appropriate level. The bidirectional screw 66 is driven by the third motor 65 to rotate, so that the bidirectional screw 66 drives the two clamping frames 67 to move inward, so that the rollers 68 on the clamping frames 67 clamp and fix the first welding pipe 4. Then, the second welding pipe 5 is placed on the first welding pipe 4 and is clamped and fixed by the upper roller 68.

[0058] Then, the sixth motor 716 drives the threaded rod 717 to rotate, so that the threaded rod 717 drives the sliding table 718 to slide and adjust on the inner side of the support frame 715. At the same time, the electric telescopic rod 719 drives the laser welding head 7110 to move laterally, and adjusts the position of the laser welding head 7110 to the joint of the first welding tube 4 and the second welding tube 5. Then, the laser welding head 7110 is used to weld the first welding tube 4 and the second welding tube 5. At the same time, the fifth motor 712 drives the third gear 713 to rotate on the outside of the half gear ring 714, so that it drives the sliding seat 711 on the welding table 1. The laser welding head 7110 slides around the first welding tube 4 and the second welding tube 5, thereby welding the joint between the first welding tube 4 and the second welding tube 5. When the laser welding head 7110 has welded half of the first welding tube 4 and the second welding tube 5, the first motor 314 drives the first gear 315 to rotate, so that the first gear 315 drives the rotating table 312 to rotate in the fixed box 311 through the meshing fixed ring gear 313, thereby driving the first welding tube 4 and the second welding tube 5 to rotate, gradually rotating the unwelded position outward, and cooperating with the laser welding head 7110 to weld;

[0059] During the welding process, suction is generated by the exhaust fan 724, so that the exhaust hood 722 sucks the welding smoke generated during welding into the connecting pipe 723 and introduces it into the interior of the purification box 721. The welding is filtered and purified by the activated carbon plate 727 inside the purification box 721, and the purified welding smoke is discharged through the exhaust pipe 728.

[0060] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. A laser device for welding pipelines, comprising a welding table (1), characterized in that: A support leg (2) is fixedly mounted on the bottom of the welding platform (1); a rotating clamping mechanism (3) is arranged inside the welding platform (1); a first welding pipe (4) is arranged on the top of the rotating clamping mechanism (3); a second welding pipe (5) is arranged on the top of the first welding pipe (4); a pipe fixing mechanism (6) is arranged on the top of the welding platform (1); and a welding mechanism (7) is arranged on the top of the welding platform (1); The rotating clamping mechanism (3) comprises a rotating component (31) and a clamping component (32); the rotating component (31) is arranged inside the welding table (1), and the clamping component (32) is arranged inside the rotating component (31); The rotating assembly (31) comprises a fixed box (311), the fixed box (311) being fixedly mounted inside the welding table (1), a rotating table (312) being rotatably mounted inside the fixed box (311), a fixed gear ring (313) being fixedly mounted at the bottom of the rotating table (312), a first motor (314) being fixedly mounted on the inner wall of the bottom of the fixed box (311), a first gear (315) being fixedly mounted at the output end of the first motor (314), and the first gear (315) being meshed with the fixed gear ring (313); The clamping assembly (32) comprises a second motor (321), the second motor (321) is fixedly mounted on the bottom inner wall of the rotating platform (312), a rotating plate (322) is fixedly mounted on the output end of the second motor (321), four connecting bent rods (323) are rotatably mounted on the outside of the rotating plate (322), and a clamping plate (324) is rotatably mounted on one end of the four connecting bent rods (323) away from the rotating plate (322); Four clamping plates (324) are provided, and four sliding grooves are provided at the top of the rotating platform (312) and at positions corresponding to the four clamping plates (324), and the four clamping plates (324) are respectively slidably installed inside the sliding grooves; The welding mechanism (7) comprises a welding component (71) and a purification component (72), wherein the welding component (71) is arranged on the top of the welding table (1) and extends to the bottom, and the purification component (72) is arranged on the top of the welding table (1); The welding assembly (71) comprises a sliding seat (711), the sliding seat (711) being slidably mounted inside the welding table (1), a fifth motor (712) being fixedly mounted on the bottom of the sliding seat (711), a third gear (713) being fixedly mounted on the output end of the fifth motor (712), a half gear ring (714) being fixedly mounted on the bottom of the welding table (1), and the third gear (713) being meshed with the half gear ring (714), a support frame (715) being fixedly mounted on the top of the sliding seat (711), a sixth motor (716) being fixedly mounted on the top of the support frame (715), a threaded rod (717) being fixedly mounted on the output end of the sixth motor (716), a sliding table (718) being slidably mounted inside the support frame (715), an electric telescopic rod (719) being arranged on the top of the sliding table (718), and a laser welding head (7110) being fixedly mounted on the right side of the electric telescopic rod (719); A semicircular slide groove is provided inside the welding table (1), and the sliding seat (711) is slidably mounted inside the semicircular slide groove; threaded holes are provided at corresponding positions of the sliding table (718) and the threaded rod (717), and the threaded rod (717) is threadedly mounted inside the threaded hole; The pipeline fixing mechanism (6) comprises a fixing column (61), wherein the fixing column (61) is fixedly mounted on the top of the welding platform (1), a top plate (62) is fixedly mounted on the top of the fixing column (61), a threaded column (63) is fixedly mounted between the bottom of the top plate (62) and the top of the welding platform (1), a sliding frame (64) is slidably mounted on the outside of the fixing column (61), a third motor (65) is fixedly mounted on the left side of the sliding frame (64), a bidirectional screw (66) is fixedly mounted on the output end of the third motor (65), a clamping frame (67) is slidably mounted inside the sliding frame (64) extending to the front side, a roller (68) is arranged on the inner side of the clamping frame (67), a fourth motor (69) is fixedly mounted on the top of the sliding frame (64), a second gear (610) is fixedly mounted on the output end of the fourth motor (69), and a threaded tooth sleeve (611) is rotatably mounted inside the sliding frame (64).

2. The laser device for welding pipelines according to claim 1, characterized in that: The threaded tooth sleeve (611) is threadably mounted on the outside of the threaded column (63), and the second gear (610) is meshed with a toothed structure on the outside of the threaded tooth sleeve (611).

3. The laser device for welding pipelines according to claim 1, characterized in that: Two sliding frames (64) are provided, and two clamping frames (67) are provided inside the two sliding frames (64). The two clamping frames (67) are respectively threadedly mounted on the outside of two ends of the bidirectional screw (66) with opposite thread directions.

4. The laser device for welding pipelines according to claim 1, characterized in that: The purification assembly (72) comprises a purification box (721), wherein the purification box (721) is fixedly mounted on the top of the welding table (1), a fume hood (722) is arranged on the top of the laser welding head (7110), a connecting pipe (723) is fixedly mounted between the fume hood (722) and the purification box (721), a fume extractor fan (724) is arranged inside the purification box (721), an installation box (725) is movably mounted inside the purification box (721), a cover plate (726) is arranged at the top of the purification box (721) and at the corresponding position of the installation box (725), an activated carbon plate (727) is inserted inside the installation box (725), and a smoke exhaust pipe (728) is fixedly mounted on the right side of the purification box (721).

5. The laser device for welding pipelines according to claim 4, characterized in that: The connecting pipe (723) is a flexible hose, and a through hole is provided on the left side of the purification box (721), and the connecting pipe (723) is fixedly installed at the through hole.

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