Auxiliary welding device for spiral steel pipe

Abstract

The invention discloses a spiral steel pipe welding auxiliary device which comprises a base, a moving mechanism is arranged at the upper end of the base, a rotating mechanism and a lifting mechanism are arranged at the upper end of the moving mechanism, the lifting mechanism is located on the rear side of the rotating mechanism, a transmission assembly is arranged on the rear side of the lifting mechanism, and an adjusting mechanism and a pressing roller are arranged at the front end of the lifting mechanism. And the lifting mechanism is connected with the hold-down roller through the adjusting mechanism. According to the spiral steel pipe welding device, the transmission assembly is arranged and used for driving the spiral steel pipes to rotate, in this way, the welding machine can weld the periphery of the joint of the two spiral steel pipes conveniently, and therefore the welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding auxiliary devices, and in particular to a spiral steel pipe welding auxiliary device. Background Art

[0002] Spiral steel pipes are made of strip steel coils as raw materials, through a normal temperature extrusion forming process, and welded by an automatic double-wire double-sided submerged arc welding process. They have a hollow cross-section and a length greater than their diameter; when using spiral steel pipes, sometimes it is necessary to weld two spiral steel pipes together, and a welding auxiliary device is required to play a role in fixing and supporting the spiral steel pipes.

[0003] At present, when the existing spiral steel pipe welding auxiliary device is in use, it can only support the spiral steel pipe, making it inconvenient to weld around the spiral steel pipe when welding the butt joint of two spiral steel pipes, thus affecting the working efficiency during welding. Therefore, it is necessary to design a spiral steel pipe welding auxiliary device. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a spiral steel pipe welding auxiliary device.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A spiral steel pipe welding auxiliary device, including a base, a moving mechanism is arranged at the upper end of the base, a rotating mechanism and a lifting mechanism are arranged at the upper end of the moving mechanism, the lifting mechanism is located behind the rotating mechanism, a transmission component is arranged behind the lifting mechanism, an adjusting mechanism and a pressing roller are arranged in front of the lifting mechanism, and the lifting mechanism is connected to the pressing roller through the adjusting mechanism.

[0006] As a further description of the above technical solution:

[0007] The moving mechanism includes support plates, a first motor, a bidirectional threaded rod, threaded blocks, moving plates, a slide rail and sliders. Support plates are fixedly connected to both sides of the upper end of the base. The bidirectional threaded rod is rotatably connected inside the support plates. The circumferential surface of the bidirectional threaded rod is threadedly connected with threaded blocks. There are two threaded blocks, which are symmetrically distributed on the bidirectional threaded rod. The internal thread directions of the two threaded blocks are opposite. The upper ends of the two threaded blocks are fixedly connected with moving plates; The first motor is fixedly connected to the left side of the left support plate, and the output end of the first motor is fixedly connected to the bidirectional threaded rod; The slide rail is fixedly connected to the upper end of the base, and the slider is slidably connected to the slide rail. The slider is fixedly connected to the moving plate.

[0008] As a further description of the above technical solution:

[0009] The rotating mechanism includes a first bearing block, an auxiliary support roller, a second bearing block, a main support roller, a reduction motor, a transmission rod, and a transmission cylinder. The front side of the upper end of the moving plate is fixedly connected to the first bearing block, and the auxiliary support roller is rotatably connected inside the first bearing block. The rear side of the upper end of the moving plate is fixedly connected to the second bearing block, and the main support roller is rotatably connected inside the second bearing block. The side end of the second bearing block is fixedly connected to the reduction motor, and the output end of the reduction motor is fixedly connected to the main support roller. The right end of the main support roller on the left side is fixedly connected to the transmission rod, and the left end of the main support roller on the right side is fixedly connected to the transmission cylinder. The transmission rod is located inside the transmission cylinder and is slidably connected to the transmission cylinder. The end face shape of the transmission rod is hexagonal.

[0010] As a further description of the above technical solution:

[0011] The lifting mechanism includes a rotating seat, a square cylinder, a moving rod, a cantilever, a first lead screw, and a second motor. The rotating seat is rotatably connected inside the moving plate, and the square cylinder is fixedly connected to the upper end of the rotating seat. The moving rod is slidably connected inside the square cylinder. The upper end of the moving rod is cylindrical, and the front side of the upper end of the moving rod is fixedly connected to the cantilever. The first lead screw is rotatably connected inside the rotating seat, and the first lead screw is threadedly connected to the moving rod. The second motor is fixedly connected to the lower end of the rotating seat, and the output end of the second motor is fixedly connected to the first lead screw.

[0012] As a further description of the above technical solution:

[0013] The side end face of the square cylinder is provided with a first limiting hole, and a limiting block is slidably connected inside the first limiting hole. The limiting block is fixedly connected to the moving rod.

[0014] As a further description of the above technical solution:

[0015] The transmission assembly includes a rotating ring, a connecting plate, a rack, a transmission gear, a third bearing block, a transmission shaft, a bevel gear, and an annular bevel gear. The rotating ring is rotatably connected to the upper end of the moving rod, and the connecting plate is fixedly connected to the circumferential surface of the rotating ring. The rack is fixedly connected to the lower end of the connecting plate. The third bearing block is fixedly connected to the lower end of the moving plate, and the transmission shaft is rotatably connected inside the third bearing block. One end of the transmission shaft is fixedly connected to the transmission gear, and the transmission gear meshes with the rack. The other end of the transmission shaft is fixedly connected to the bevel gear, and the annular bevel gear is fixedly connected to the lower end of the rotating seat. The annular bevel gear meshes with the bevel gear.

[0016] As a further description of the above technical solution:

[0017] A limiting seat is fixedly connected to the rear end of the moving plate. A limiting bar is slidably connected inside the limiting seat, and the limiting bar is fixedly connected to the rack.

[0018] As a further description of the above technical solution:

[0019] A support cylinder is fixedly connected to the upper end of the moving plate. The upper end of the rotating seat is located inside the support cylinder and is rotatably connected to the support cylinder. A limiting ring is fixedly connected to the circumferential surface of the support cylinder. A second limiting hole is formed in the upper end surface of the limiting ring. The second limiting hole is in an arc shape, and the center of the second limiting hole and the center of the rotating seat are on the same straight line. A limiting rod is slidably connected inside the second limiting hole. A connecting block is fixedly connected to the upper end of the limiting rod, and the connecting block is fixedly connected to the rotating seat.

[0020] As a further description of the above technical solution:

[0021] A square hole is formed in the upper end surface of the base, and the square hole corresponds to the rack.

[0022] As a further description of the above technical solution:

[0023] The adjusting mechanism includes a square frame, a third motor, a second lead screw, a moving block and an installation frame. A square frame is fixedly connected to the front end of the cantilever. A second lead screw is rotatably connected inside the square frame. A moving block is threadedly connected to the circumferential surface of the second lead screw. The moving block is located inside the square frame and is slidably connected to the square frame. An installation frame is fixedly connected to the front end of the moving block, and the installation frame is rotatably connected to the pressing roller. A third motor is fixedly connected to the upper end of the square frame, and the output end of the third motor is fixedly connected to the second lead screw.

[0024] The present invention has the following beneficial effects:

[0025] 1. Compared with the prior art, in this spiral steel pipe welding auxiliary device, by setting a transmission component, the transmission component is used to drive the spiral steel pipe to rotate, so that it is convenient for the welding machine to weld the circumference of the joint of the two spiral steel pipes, thereby improving the welding efficiency.

[0026] 2. Compared with the prior art, in this spiral steel pipe welding auxiliary device, by setting a support plate, a first motor, a bidirectional lead screw, a threaded block, a moving plate, a slide rail and a slider, when in use, the first motor works, and at this time, with the cooperation of the bidirectional lead screw, the threaded block can be driven to move, and then with the cooperation of the slide rail and the slider, the moving plate can move smoothly. When the two moving plates move towards each other, it is convenient for the two spiral steel pipes to be butted together, which is conducive to welding the two spiral steel pipes together.

[0027] 3. Compared with the prior art, for this spiral steel pipe welding auxiliary device, with the cooperation of the rotating seat, square cylinder, moving rod, cantilever, first lead screw, second motor, adjusting mechanism and pressing roller, after the spiral steel pipe is placed on the auxiliary supporting roller and the main supporting roller, the second motor rotates forward to drive the first lead screw to rotate, thereby driving the moving rod to move downward inside the square cylinder. As the moving rod moves downward, with the cooperation of the cantilever and the adjusting mechanism, the pressing roller can be driven to move downward, so that the pressing roller presses on the spiral steel pipe. This is conducive to the stable rotation of the spiral steel pipe. At the same time, with the cooperation of the adjusting mechanism, it is also beneficial to change the position of the pressing roller, thus facilitating the pressing of spiral steel pipes with different diameters.

[0028] 4. Compared with the prior art, for this spiral steel pipe welding auxiliary device, by setting the rotating ring, connecting plate, rack, transmission gear, third bearing seat, transmission shaft, bevel gear and annular bevel gear, when the moving rod moves upward, at this time, with the cooperation of the rotating ring and the connecting plate, the rack can be driven to move upward. As the rack moves upward, with the cooperation of the gear and the transmission shaft, the bevel gear can be driven to rotate. Then, with the cooperation of the annular bevel gear, the rotating seat can be driven to rotate. As the rotating seat rotates, at this time, the pressing roller can be driven to rotate backward, so that the pressing roller is no longer located above the spiral steel pipe, which facilitates the removal of the welded spiral steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the whole invention from the first perspective;

[0030] Figure 2 For the present invention Figure 1 is an enlarged view of part A;

[0031] Figure 3 is a schematic structural diagram of the whole invention from the second perspective;

[0032] Figure 4 For the present invention Figure 3 is an enlarged view of part B;

[0033] Figure 5 For the present invention Figure 3 is an enlarged view of part C;

[0034] Figure 6 is a schematic structural diagram of the whole invention from the third perspective;

[0035] Figure 7 For the present invention Figure 6 is an enlarged view of part D;

[0036] Figure 8 is a schematic structural diagram of the invention after a right - hand sectional view;

[0037] Figure 9 For the present inventionFigure 8 Enlarged view of part E;

[0038] Figure 10 This is the present invention Figure 8 Enlarged view of part F;

[0039] Figure 11 This is the structural schematic diagram of the present invention after being viewed from the front and sectioned.

[0040] Legend description:

[0041] 1. Base; 2. Moving mechanism; 201. Support plate; 202. First motor; 203. Bidirectional threaded rod; 204. Threaded block; 205. Moving plate; 206. Slide rail; 207. Slide block; 3. Rotating mechanism; 301. First bearing seat; 302. Auxiliary support roller; 303. Second bearing seat; 304. Main support roller; 305. Reducing motor; 306. Transmission rod; 307. Transmission cylinder; 4. Lifting mechanism; 401. Rotating seat; 402. Square tube; 403. Moving rod; 404. Cantilever; 405. First lead screw; 406. Second motor; 5. Transmission component; 501. Rotating ring; 502. Connecting plate; 503. Rack; 504. Transmission gear; 505. Third bearing seat; 506. Transmission shaft; 507. Bevel gear; 508. Ring bevel gear; 6. Adjusting mechanism; 601. Square frame; 602. Third motor; 603. Second lead screw; 604. Moving block; 605. Installation frame; 7. Pressing roller; 8. Square hole; 9. Limit seat; 10. Limit bar; 11. First limit hole; 12. Limit block; 13. Support cylinder; 14. Limit ring; 15. Second limit hole; 16. Limit rod; 17. Connecting block. Specific implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0043] Referring to Figures 1-11 , a spiral steel pipe welding auxiliary device provided by the present invention includes a base 1, a moving mechanism 2 is arranged at the upper end of the base 1, a rotating mechanism 3 and a lifting mechanism 4 are arranged at the upper end of the moving mechanism 2, the lifting mechanism 4 is located at the rear side of the rotating mechanism 3, a transmission component 5 is arranged at the rear side of the lifting mechanism 4, an adjusting mechanism 6 and a pressing roller 7 are arranged at the front end of the lifting mechanism 4, and the lifting mechanism 4 is connected to the pressing roller 7 through the adjusting mechanism 6.

[0044] Specifically, the moving mechanism 2 includes a support plate 201, a first motor 202, a bidirectional threaded rod 203, threaded blocks 204, a moving plate 205, a slide rail 206 and a slider 207. Both sides of the upper end of the base 1 are fixedly connected with a support plate 201. The bidirectional threaded rod 203 is rotatably connected inside the support plate 201. The circumferential surface of the bidirectional threaded rod 203 is threadedly connected with threaded blocks 204. There are two threaded blocks 204, which are symmetrically distributed on the bidirectional threaded rod 203. The thread directions of the internal threads of the two threaded blocks 204 are opposite. The upper ends of the two threaded blocks 204 are fixedly connected with a moving plate 205 respectively. The first motor 202 is fixedly connected to the left side of the support plate 201 on the left. The output end of the first motor 202 is fixedly connected with the bidirectional threaded rod 203. The slide rail 206 is fixedly connected to the upper end of the base 1. The slider 207 is slidably connected to the slide rail 206. The slider 207 is fixedly connected with the moving plate 205. During operation, the first motor 202 rotates forward. At this time, with the cooperation of the bidirectional threaded rod 203, the two threaded blocks 204 can be driven to move towards each other. Furthermore, with the cooperation of the slide rail 206 and the slider 207, the two moving plates 205 can move towards each other stably. In this way, it is convenient to butt the two spiral steel pipes together.

[0045] The rotating mechanism 3 includes a first bearing seat 301, an auxiliary support roller 302, a second bearing seat 303, a main support roller 304, a reduction motor 305, a transmission rod 306 and a transmission cylinder 307. The first bearing seat 301 is fixedly connected to the front side of the upper end of the moving plate 205. The auxiliary support roller 302 is rotatably connected inside the first bearing seat 301. The second bearing seat 303 is fixedly connected to the rear side of the upper end of the moving plate 205. The main support roller 304 is rotatably connected inside the second bearing seat 303. The reduction motor 305 is fixedly connected to the side end of the second bearing seat 303. The output end of the reduction motor 305 is fixedly connected with the main support roller 304. The transmission rod 306 is fixedly connected to the right end of the main support roller 304 on the left. The transmission cylinder 307 is fixedly connected to the left end of the main support roller 304 on the right. The transmission rod 306 is located inside the transmission cylinder 307 and is slidably connected to the transmission cylinder 307. The end face shape of the transmission rod 306 is hexagonal. During operation, the reduction motor 305 operates, driving the main support roller 304 to rotate. Then, with the cooperation of the transmission rod 306 and the transmission cylinder 307, the two main support rollers 304 on the left and right can rotate simultaneously. At the same time, with the cooperation of the auxiliary support roller 302, the two spiral steel pipes can be driven to rotate in the same direction simultaneously. This is beneficial to welding the entire circumference of the joint of the two spiral steel pipes, thereby improving the welding efficiency.

[0046] The lifting mechanism 4 includes a rotating seat 401, a square tube 402, a moving rod 403, a cantilever 404, a first lead screw 405 and a second motor 406. The rotating seat 401 is rotatably connected inside the moving plate 205. The upper end of the rotating seat 401 is fixedly connected with the square tube 402. The moving rod 403 is slidably connected inside the square tube 402. The upper end of the moving rod 403 is cylindrical. The front side of the upper end of the moving rod 403 is fixedly connected with the cantilever 404. The first lead screw 405 is rotatably connected inside the rotating seat 401. The first lead screw 405 is threadedly connected with the moving rod 403. The lower end of the rotating seat 401 is fixedly connected with the second motor 406. The output end of the second motor 406 is fixedly connected with the first lead screw 405. During operation, the second motor 406 rotates forward. At this time, with the cooperation of the first lead screw 405, the moving rod 403 can be driven to move downward inside the square tube 402. As the square tube 402 moves downward, with the cooperation of the cantilever 404 and the adjusting mechanism 6, the pressing roller 7 can be driven to move downward, so that the pressing roller 7 presses on the spiral steel pipe, which is beneficial to the stable rotation of the spiral steel pipe. When the second motor 406 rotates in reverse, the moving rod 403 can be driven to move upward, so that the pressing roller 7 is separated from the spiral steel pipe.

[0047] A first limiting hole 11 is formed in the side end face of the square tube 402. A limiting block 12 is slidably connected inside the first limiting hole 11. The limiting block 12 is fixedly connected with the moving rod 403. During operation, by providing the first limiting hole 11 and the limiting block 12, the movement of the moving rod 403 can be limited at this time, effectively preventing the moving rod 403 from detaching from the square tube 402.

[0048] The transmission assembly 5 includes a rotating ring 501, a connecting plate 502, a rack 503, a transmission gear 504, a third bearing block 505, a transmission shaft 506, a bevel gear 507 and an annular bevel gear 508. The upper end of the moving rod 403 is rotatably connected to the rotating ring 501. The circumferential surface of the rotating ring 501 is fixedly connected to the connecting plate 502, and the lower end of the connecting plate 502 is fixedly connected to the rack 503. The lower end of the moving plate 205 is fixedly connected to the third bearing block 505. The transmission shaft 506 is rotatably connected inside the third bearing block 505. One end of the transmission shaft 506 is fixedly connected to the transmission gear 504, and the transmission gear 504 meshes with the rack 503. The other end of the transmission shaft 506 is fixedly connected to the bevel gear 507. The lower end of the rotating seat 401 is fixedly connected to the annular bevel gear 508, and the annular bevel gear 508 meshes with the bevel gear 507. During operation, when the moving rod 403 moves downward, with the cooperation of the rotating ring 501 and the connecting plate 502, the rack 503 can be driven to move downward. As the rack 503 moves downward, with the cooperation of the gear and the transmission shaft 506, the bevel gear 507 can be driven to rotate. Then, with the cooperation of the annular bevel gear 508, the rotating seat 401 can be driven to rotate. As the rotating seat 401 rotates, the pressing roller 7 can be driven to rotate to the upper end of the spiral steel pipe, so that the axis of the pressing roller 7 is parallel to the axis of the spiral steel pipe. After the pressing roller 7 rotates to the upper end of the spiral steel pipe, the adjusting mechanism 6 works to drive the pressing roller 7 downward, so that the pressing roller 7 contacts the spiral steel pipe, realizing the pressing of the spiral steel pipe, which is beneficial to the stable rotation of the spiral steel pipe. When the moving rod 403 moves upward, the rotating seat 401 is driven to rotate in the reverse direction, so that the pressing roller 7 is no longer located at the upper end of the spiral steel pipe, which facilitates the removal of the welded spiral steel pipe.

[0049] A limit seat 9 is fixedly connected to the rear end of the moving plate 205. A limit bar 10 is slidably connected inside the limit seat 9, and the limit bar is fixedly connected to the rack 503. During operation, by providing the limit seat 9 and the limit bar 10, the movement of the rack 503 can be limited, so that the rack 503 can move up and down smoothly.

[0050] A support cylinder 13 is fixedly connected to the upper end of the moving plate 205. The upper end of the rotating seat 401 is located inside the support cylinder 13 and is rotatably connected to the support cylinder 13. A limiting ring 14 is fixedly connected to the circumferential surface of the support cylinder 13. A second limiting hole 15 is formed in the upper end surface of the limiting ring 14. The second limiting hole 15 is arc-shaped, and the center of the second limiting hole 15 is on the same straight line as the center of the rotating seat 401. A limiting rod 16 is slidably connected inside the second limiting hole 15. The upper end of the limiting rod 16 is fixedly connected to a connecting block 17, and the connecting block 17 is fixedly connected to the rotating seat 401. During operation, under the action of the support cylinder 13, the support for the rotating seat 401 can be realized, which is beneficial to the stable rotation of the rotating seat 401. At the same time, the rotation of the rotating seat 401 also drives the limiting rod 16 to slide inside the second limiting hole 15 under the cooperation of the connecting block 17. With the cooperation of the limiting rod 16 and the second limiting hole 15, the rotation angle of the rotating seat 401 can be limited, which is beneficial to keeping the axis of the pressing roller 7 parallel to the axis of the spiral steel pipe.

[0051] A square hole 8 is formed in the upper end surface of the base 1. The square hole 8 corresponds to the rack 503. During operation, by providing the square hole 8, it is convenient for the lower end of the rack 503 to slide inside the base 1 under the action of the square hole 8.

[0052] The adjusting mechanism 6 includes a square frame 601, a third motor 602, a second lead screw 603, a moving block 604 and a mounting frame 605. The front end of the cantilever 404 is fixedly connected to the square frame 601. The second lead screw 603 is rotatably connected inside the square frame 601. The moving block 604 is threadedly connected to the circumferential surface of the second lead screw 603. The moving block 604 is located inside the square frame 601 and is slidably connected to the square frame 601. The front end of the moving block 604 is fixedly connected to the mounting frame 605, and the mounting frame 605 is rotatably connected to the pressing roller 7. The third motor 602 is fixedly connected to the upper end of the square frame 601, and the output end of the third motor 602 is fixedly connected to the second lead screw 603. During operation, when the third motor 602 rotates forward, the moving block 604 can be driven to move downward under the cooperation of the second lead screw 603, and then the pressing roller 7 can be driven to move downward under the cooperation of the mounting frame 605, so as to facilitate the pressing roller 7 to press on the spiral steel pipe, realize the pressing of the spiral steel pipe, and is beneficial to the stable driving of the spiral steel pipe to rotate by the rotating mechanism 3.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spiral steel pipe welding auxiliary device, comprising a base (1), characterized in that: A moving mechanism (2) is provided at the upper end of the base (1). A rotating mechanism (3) and a lifting mechanism (4) are provided at the upper end of the moving mechanism (2). The lifting mechanism (4) is located at the rear side of the rotating mechanism (3). A transmission assembly (5) is provided at the rear side of the lifting mechanism (4). An adjusting mechanism (6) and a pressing roller (7) are provided at the front end of the lifting mechanism (4). The lifting mechanism (4) is connected to the pressing roller (7) through the adjusting mechanism (6).

2. The spiral steel pipe welding auxiliary device according to claim 1, characterized in that: The moving mechanism (2) includes a support plate (201), a first motor (202), a bidirectional threaded rod (203), threaded blocks (204), a moving plate (205), a slide rail (206), and a slider (207). Support plates (201) are fixedly connected to both sides of the upper end of the base (1). A bidirectional threaded rod (203) is rotatably connected inside the support plate (201). Threaded blocks (204) are threadedly connected to the circumferential surface of the bidirectional threaded rod (203). There are two threaded blocks (204), which are symmetrically distributed on the bidirectional threaded rod (203). The internal thread directions of the two threaded blocks (204) are opposite. Moving plates (205) are fixedly connected to the upper ends of the two threaded blocks (204). A first motor (202) is fixedly connected to the left side of the support plate (201) on the left. The output end of the first motor (202) is fixedly connected to the bidirectional threaded rod (203). A slide rail (206) is fixedly connected to the upper end of the base (1). A slider (207) is slidably connected to the slide rail (206). A fixed connection is provided between the slider (207) and the moving plate (205).

3. The spiral steel pipe welding auxiliary device according to claim 2, wherein: The rotating mechanism (3) includes a first bearing seat (301), an auxiliary support roller (302), a second bearing seat (303), a main support roller (304), a reduction motor (305), a transmission rod (306), and a transmission cylinder (307). A first bearing seat (301) is fixedly connected to the front side of the upper end of the moving plate (205). An auxiliary support roller (302) is rotatably connected inside the first bearing seat (301). A second bearing seat (303) is fixedly connected to the rear side of the upper end of the moving plate (205). A main support roller (304) is rotatably connected inside the second bearing seat (303). A reduction motor (305) is fixedly connected to the side end of the second bearing seat (303). The output end of the reduction motor (305) is fixedly connected to the main support roller (304). A transmission rod (306) is fixedly connected to the right end of the main support roller (304) on the left. A transmission cylinder (307) is fixedly connected to the left end of the main support roller (304) on the right. The transmission rod (306) is located inside the transmission cylinder (307) and is slidably connected to the transmission cylinder (307). The end face shape of the transmission rod (306) is hexagonal.

4. The spiral steel pipe welding auxiliary device according to claim 2, characterized in that: The lifting mechanism (4) includes a rotating seat (401), a square cylinder (402), a moving rod (403), a cantilever (404), a first lead screw (405), and a second motor (406). The rotating seat (401) is rotatably connected inside the moving plate (205). The upper end of the rotating seat (401) is fixedly connected to the square cylinder (402). The moving rod (403) is slidably connected inside the square cylinder (402). The upper end of the moving rod (403) is cylindrical. The front side of the upper end of the moving rod (403) is fixedly connected to the cantilever (404). A first lead screw (405) is rotatably connected inside the rotating seat (401). The first lead screw (405) is threadedly connected to the moving rod (403). The lower end of the rotating seat (401) is fixedly connected to the second motor (406). The output end of the second motor (406) is fixedly connected to the first lead screw (405).

5. The spiral steel pipe welding auxiliary device according to claim 4, characterized in that: A first limiting hole (11) is formed in the side end face of the square cylinder (402). A limiting block (12) is slidably connected inside the first limiting hole (11). The limiting block (12) is fixedly connected to the moving rod (403).

6. The auxiliary device for spiral steel pipe welding according to claim 4, characterized in that: The transmission component (5) includes a rotating ring (501), a connecting plate (502), a rack (503), a transmission gear (504), a third bearing seat (505), a transmission shaft (506), a bevel gear (507), and an annular bevel gear (508). The rotating ring (501) is rotatably connected to the upper end of the moving rod (403). The circumferential surface of the rotating ring (501) is fixedly connected to the connecting plate (502). The lower end of the connecting plate (502) is fixedly connected to the rack (503). The third bearing seat (505) is fixedly connected to the lower end of the moving plate (205). A transmission shaft (506) is rotatably connected inside the third bearing seat (505). One end of the transmission shaft (506) is fixedly connected to the transmission gear (504). The transmission gear (504) meshes with the rack (503). The other end of the transmission shaft (506) is fixedly connected to the bevel gear (507). The annular bevel gear (508) is fixedly connected to the lower end of the rotating seat (401). The annular bevel gear (508) meshes with the bevel gear (507).

7. The spiral steel pipe welding auxiliary device according to claim 6, characterized in that: A limiting seat (9) is fixedly connected to the rear end of the moving plate (205). A limiting strip (10) is slidably connected inside the limiting seat (9). The limiting strip (10) is fixedly connected to the rack (503).

8. The auxiliary device for spiral steel pipe welding according to claim 4, characterized in that: A support cylinder (13) is fixedly connected to the upper end of the moving plate (205). The upper end of the rotating seat (401) is located inside the support cylinder (13) and is rotatably connected to the support cylinder (13). A limiting ring (14) is fixedly connected to the circumferential surface of the support cylinder (13). A second limiting hole (15) is formed in the upper end surface of the limiting ring (14). The second limiting hole (15) is arc-shaped. The center of the second limiting hole (15) is on the same straight line as the center of the rotating seat (401). A limiting rod (16) is slidably connected inside the second limiting hole (15). A connecting block (17) is fixedly connected to the upper end of the limiting rod (16). The connecting block (17) is fixedly connected to the rotating seat (401).

9. An auxiliary device for spiral steel pipe welding according to claim 6, characterized in that: A square hole (8) is formed in the upper end surface of the base (1). The square hole (8) corresponds to the rack (503).

10. An auxiliary device for spiral steel pipe welding according to claim 4, characterized in that: The adjusting mechanism (6) includes a square frame (601), a third motor (602), a second lead screw (603), a moving block (604) and a mounting frame (605). A square frame (601) is fixedly connected to the front end of the cantilever (404). A second lead screw (603) is rotatably connected inside the square frame (601). A moving block (604) is threadedly connected to the circumferential surface of the second lead screw (603). The moving block (604) is located inside the square frame (601) and is slidably connected to the square frame (601). A mounting frame (605) is fixedly connected to the front end of the moving block (604). The mounting frame (605) is rotatably connected to the pressing roller (7). A third motor (602) is fixedly connected to the upper end of the square frame (601). The output end of the third motor (602) is fixedly connected to the second lead screw (603).

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