Spiral steel pipe assembly welding device

Abstract

The invention discloses a spiral steel pipe assembly welding device, and relates to the field of microbial culture, the spiral steel pipe assembly welding device comprises two pinch supports, an upper group of pinch rollers and a lower group of pinch rollers are rotatably connected between the two pinch supports, and one end of each pinch roller penetrates through one end of the corresponding pinch support and is fixedly connected with a pinch gear; every two vertically adjacent clamping and conveying gears are meshed with each other, a vertical frame is arranged on the rear portion of the clamping and conveying support, a bottom roller is fixedly connected to one side of the vertical frame, welding supports are fixedly connected to the portions, located on the top and the bottom of the bottom roller, of one side of the vertical frame, and electric arc welding heads are fixedly connected to the faces, close to each other, of the two welding supports. And a synchronous adjusting structure is arranged on one side of the vertical frame. Through the design of the synchronous adjusting structure, synchronous movement of the three connecting frames and the forming roller is achieved, so that the diameter of the spiral steel pipe is conveniently adjusted, it is ensured that the sliding blocks are stably fixed in the sliding grooves through the thread self-locking characteristic of the double-thread lead screw, no extra fixing device is needed, and the reliability and operation efficiency of equipment are improved.

Description

Technical Field

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

[0002] The spiral steel pipe welding equipment is a highly automated, integrated, heavy-duty industrial production line specifically designed for the continuous production of large-diameter, long-distance conveying spiral seam submerged arc welded steel pipes. Its core process involves continuously winding pre-uncoiled and leveled steel strip into a set diameter and spiral angle using a spiral former, forming an open tube. Subsequently, under precisely controlled forming conditions, the main weld seams are automatically welded simultaneously on the inside and outside of the steel pipe using submerged arc welding technology. However, traditional spiral steel pipe welding equipment lacks a synchronous adjustment mechanism, which means that diameter adjustment must be done manually point by point, which is inefficient and prone to forming deviations. The lack of a pre-bending process causes the steel strip to bend suddenly, leading to stress concentration at the edges and increasing the risk of weld defects. The sliding friction between the passively rotating forming roller and the steel strip causes surface scratches, and the uneven resistance leads to uncontrolled roundness of the pipe. The gear set lacks rigid linkage and frequently disengages and jams when the spacing changes, forcing production to be interrupted for maintenance, which comprehensively restricts product quality and production capacity stability. Summary of the Invention

[0003] The main purpose of the present invention is to provide a spiral steel pipe welding device, which can effectively solve the technical problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A spiral steel pipe butt welding device comprises two pinching brackets, wherein two sets of upper and lower pinching rollers are rotatably connected between the two pinching brackets, one end of each pinching roller passes through one end of the pinching bracket and is fixedly connected to a pinching gear, and the two adjacent pinching gears are meshed with each other, a vertical frame is provided at the rear of the pinching bracket, one side of the vertical frame is fixedly connected to a bottom roller, one side of the vertical frame and the top and bottom of the bottom roller are fixedly connected to welding brackets, the adjacent surfaces of the two welding brackets are fixedly connected to arc welding joints, and one side of the vertical frame is provided with a synchronous adjustment structure; The synchronous adjustment structure includes three connecting frames, three sliding grooves are opened on one side of the vertical frame, the interior of the three sliding grooves are rotatably connected with double-threaded screw rods, the interior of the three sliding grooves are slidably connected with sliders, the three connecting frames are fixedly connected to the three sliders respectively, one side of each connecting frame is fixedly connected to a pressure roller, and one side of each connecting frame is rotatably connected to a pair of forming rollers.

[0005] As a further solution of the present invention, a placement groove 1 is opened inside the stand, and the three double-threaded screw rods are fixedly connected to the adjacent ends and located inside the placement groove 1 with a bevel gear 1, and a bevel gear 2 is provided on one side inside the placement groove 1, and the bevel gear 2 is engaged with the three bevel gears 1 at the same time.

[0006] As a further solution of the present invention, the slider is threadedly connected to the double-threaded screw, and the three connecting frames are symmetrically arranged in an equilateral triangle around the center of the vertical frame.

[0007] As a further solution of the present invention, a pair of pre-bending brackets are provided between the clamping bracket and the vertical frame, and two groups of pre-bending rollers are fixedly connected between the pair of pre-bending brackets, and both groups of pre-bending rollers are arranged in an arc shape.

[0008] As a further solution of the present invention, an adjustment transmission structure is provided on the other side of the stand, and the adjustment transmission structure includes three pairs of spur gears 1. One side of the stand passes through the other side and three pairs of lifting slots are opened. The three pairs of spur gears 1 pass through the three pairs of lifting slots respectively. A support frame is provided on the other side of the stand, one side of the support frame is rotatably connected to turntable 1, one side of turntable 1 is rotatably connected to turntable 2, one side of turntable 1 passes through the other side and three straight slots are symmetrically opened, one side of turntable 2 passes through the other side and three arc slots are symmetrically opened, a spur gear 2 is provided between each pair of spur gears 1, and the side surfaces of the three spur gears 2 respectively pass through the three arc slots and the three straight slots are fixedly connected to limiting rods.

[0009] As a further solution of the present invention, the spur gear 1 is fixedly connected to the forming roller, and the spur gear 1 and the spur gear 2 are meshed with each other.

[0010] As a further solution of the present invention, three cylinders are fixedly connected at equal distances to the other side of the support frame, three sliding blocks are slidably connected to one side of the support frame at equal distances from the other side, three slots are opened at equal distances from one side of the turntable through the other side, the sliding blocks are adaptively matched with the slots, and the output shaft of the cylinder is fixedly connected to the sliding block.

[0011] As a further solution of the present invention, the interior of the stand is rotatably connected to a rotating drum, the interior of the rotating drum is penetrated by an oblique tooth groove, a rotating shaft is provided inside the oblique tooth groove, the interior of the rotating shaft is penetrated by an outer surface with a number of through slots equidistantly provided, the interior of each through slot is penetrated by an engaging block rotatably connected to the top, a pair of springs are fixedly connected between the bottom of the engaging block and the through slot, the interior of the stand is penetrated by a connecting shaft rotatably connected to the other side, the center position of the other side of the support frame is fixedly connected to a motor, the output shaft of the motor penetrates turntable one and is fixedly connected to turntable two, and turntable two is fixedly connected to the connecting shaft.

[0012] As a further solution of the present invention, the coupling shaft is fixedly connected to the rotating shaft, and the rotating drum is fixedly connected to the second bevel gear.

[0013] As a further solution of the present invention, the engagement block is composed of an inclined surface and a vertical edge, and the engagement block is adaptively matched with the oblique tooth groove.

[0014] The beneficial effects of the present invention are as follows: The synchronous adjustment structure design achieves precise and synchronized movement of the three connecting frames and the forming rollers on them. This coordinated movement allows for convenient and efficient adjustment of the forming diameter of the spiral steel pipe. By cleverly utilizing the inherent self-locking properties of the double-threaded lead screw, the slider is stably and reliably fixed in any position within the chute, significantly improving the overall reliability and ease of operation of the equipment and eliminating the need for additional fixing devices. By setting up pre-bending brackets and arc-shaped pre-bending rollers, the steel strip is pre-bent before entering the bottom roller, forming a suitable conveying angle, optimizing the subsequent forming process, reducing the risk of material deformation, and enhancing the smoothness of the overall production; The establishment of gear one and gear two enables the three pairs of forming rollers to rotate synchronously and actively, continuously providing uniform propulsion and shaping guidance for the inner wall of the spiral steel strip being formed, effectively reducing the sliding friction between the material and the roller surface, thereby significantly reducing the risk of scratches on the steel strip surface. At the same time, the rotating forming rollers can ensure that the bending curvature is stable and controllable, avoiding deformation defects caused by local stress concentration, and ultimately improving the geometric accuracy of the spiral steel pipe and the forming quality of the weld area, creating a more stable structural foundation for subsequent welding processes. By adjusting the transmission structure, the distance between the three gears 2 can be adjusted synchronously, so that the three spur gears 2 can always be in meshing state with the three pairs of spur gears 1, so that the spur gears 1 can always be effectively driven.

[0015] Through the mutual cooperation between the helical tooth groove and the helical tooth block, flexible switching of different working modes of the equipment is achieved. When the motor rotates clockwise, through the interaction between the inclined surface of the meshing block and the tooth surface of the helical tooth groove, only the adjustment transmission structure is activated to adjust the distance of the spur gear two. When the motor rotates counterclockwise, through the rigid engagement between the vertical surface of the meshing block and the vertical surface of the helical tooth groove, the rotating drum can be synchronously driven to drive the bevel gear two to rotate, thereby realizing the coordinated operation of the diameter adjustment function of the synchronous adjustment structure and the distance adjustment function of the gear two of the adjustment transmission structure, which significantly simplifies the control logic of the equipment and enhances its multifunctional adaptability to meet different production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a spiral steel pipe assembly welding device according to the present invention; Figure 2 This is a diagram showing a pinching support and pinching rollers of a spiral steel pipe assembly welding device according to the present invention; Figure 3This is a disassembled display diagram of the pre-bending rollers and pre-bending brackets of a spiral steel pipe assembly welding device according to the present invention; Figure 4 This is a diagram showing the analysis of the synchronous adjustment structure of a spiral steel pipe group welding device of the present invention; Figure 5 A spiral steel pipe welding device according to the present invention Figure 4 A magnified view of part A; Figure 6 This is a disassembled display diagram of a slider and a connecting frame of a spiral steel pipe assembly welding device according to the present invention; Figure 7 This is a side view of the overall structure of the adjustment transmission structure of a spiral steel pipe group welding device of the present invention; Figure 8 This is a disassembled display diagram of the adjustment and transmission structure of a spiral steel pipe group welding device of the present invention; Figure 9 This is a disassembled display diagram of the spur gear 1 and spur gear 2 of a spiral steel pipe assembly welding device according to the present invention; Figure 10 This is a diagram showing a movable slider of a spiral steel pipe assembly welding device according to the present invention; Figure 11 This is a schematic diagram showing a stand-up analysis of a spiral steel pipe assembly welding device according to the present invention; Figure 12 A spiral steel pipe welding device according to the present invention Figure 11 A magnified view of part B; Figure 13 This is a dissected and disassembled diagram showing the rotating shaft of a spiral steel pipe group welding device according to the present invention.

[0017] In the picture: 1. Pinch and feed bracket; 2. Pinch and feed roller; 3. Pre-bending bracket; 4. Vertical frame; 5. Synchronous adjustment structure; 6. Bottom roller; 7. Welding bracket; 8. Arc welding joint; 9. Pre-bending roller; 10. Connecting frame; 11. Forming roller; 12. Pressing roller; 13. Slide groove; 14. Double-threaded screw; 15. Bevel gear 1; 16. Placement groove 1; 17. Slider; 18. Support frame; 19. Adjustment transmission structure; 20. Motor; 21. Cylinder; 22. Lifting groove; 23. Spur gear 1; 24. Spur gear 2; 25. Turntable 1; 26. Straight groove; 27. Turntable 2; 28. Arc groove; 29. ​​Slot; 30. Limiting rod; 31. Sliding block; 32. Rotating drum; 33. Coupling shaft; 34. Helical tooth groove; 35. Rotating shaft; 36. Through groove; 37. Engaging block; 38. Spring; 39. Bevel gear 2. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figures 1-13 As shown, a spiral steel pipe group welding device includes two pinching brackets 1, with upper and lower groups of pinching rollers 2 rotatably connected between the two pinching brackets 1, one end of each pinching roller 2 passes through one end of the pinching bracket 1 and is fixedly connected to a pinching gear, and the two adjacent pinching gears are meshed with each other. A vertical frame 4 is provided at the rear of the pinching bracket 1, and a bottom roller 6 is fixedly connected to one side of the vertical frame 4. A welding bracket 7 is fixedly connected to the top and bottom of the bottom roller 6 on one side of the vertical frame 4, and an arc welding head 8 is fixedly connected to the adjacent surfaces of the two welding brackets 7. A synchronous adjustment structure 5 is provided on one side of the vertical frame 4. The synchronous adjustment structure 5 includes three connecting frames 10. Three slide grooves 13 are opened on one side of the interior of the vertical frame 4. The interiors of the three slide grooves 13 are rotatably connected to double-threaded screw rods 14. The interiors of the three slide grooves 13 are slidably connected to sliders 17. The three connecting frames 10 are fixedly connected to the three sliders 17 respectively. One side of each connecting frame 10 is fixedly connected to a pressure roller 12. One side of each connecting frame 10 is rotatably connected to a pair of forming rollers 11. In actual use, an external device drives the two sets of pinch rollers 2 to rotate, and then places the steel strip between the two sets of pinch rollers 2. The steel strip is conveyed forward by the rotation of the two sets of pinch rollers 2. When the steel strip reaches the position of the bottom roller 6, it will first be bent by the bottom roller 6, and then it will be located between the three pairs of forming rollers 11 and the three pressing rollers 12, and will be completely bent and formed by them. The bent steel strip will move along one side of the stand 4 and rotate forward, and then be conveyed by the external conveying device. The bent steel strip will be welded by two arc welding heads 8 to the weld seams of the inner wall and the outer ring, and then the welded steel strip will be cut at equal distances by an external cutting device to make a spiral steel pipe. Since different spiral steel strips have different production standards, their diameters are also different. Through the synchronous adjustment structure 5, the distance between the three connecting frames 10 can be synchronously adjusted, thereby adjusting the distance between the three pairs of forming rollers 11 and the three pressing rollers 12 as a whole, thereby achieving the purpose of adjusting the diameter of the spiral steel pipe. The specific steps of the synchronous adjustment structure 5 are as follows: Rotating bevel gear 2 39 drives the three bevel gears 15 to rotate synchronously, thereby driving the three double-threaded screw rods 14 to rotate synchronously, so that the three sliders 17 slide synchronously along the three slide grooves 13 respectively, thereby driving the three connecting frames 10 to adjust the distance between them synchronously, thereby achieving the purpose of adjusting the diameter of the produced spiral steel pipe. Through the self-locking ability of the double-threaded screw rod 14, the slider 17 can be fixed at any position of the slide groove 13, so there is no need to set up an additional fixing structure.

[0020] In this embodiment, a placement groove 16 is opened inside the stand 4, and the three double-threaded screw rods 14 are fixedly connected to the adjacent ends and inside the placement groove 16 with a bevel gear 15. A bevel gear 2 39 is set on one side of the placement groove 16, and the bevel gear 2 39 is engaged with the three bevel gears 15 at the same time.

[0021] In this embodiment, the slider 17 is threadedly connected to the double-threaded screw rod 14 , and the three connecting frames 10 are symmetrically arranged in a regular triangle around the center of the vertical frame 4 .

[0022] In this embodiment, a pair of pre-bending brackets 3 are provided between the pinching bracket 1 and the vertical frame 4, and two sets of pre-bending rollers 9 are fixedly connected between the pair of pre-bending brackets 3, and both sets of pre-bending rollers 9 are arranged in an arc shape; Before being conveyed to the bottom roller 6 by the two sets of pinch rollers 2, the steel strip will first pass through two sets of pre-bending rollers 9. Since the two sets of pre-bending rollers 9 are arranged in an arc shape, the steel strip will be pre-bent by the two sets of pre-bending rollers 9 so that it can be conveyed to the position of the bottom roller 6 at a certain angle.

[0023] In this embodiment, an adjustment transmission structure 19 is provided on the other side of the stand 4. The adjustment transmission structure 19 includes three pairs of spur gears 1 23. Three pairs of lifting slots 22 are opened on one side of the stand 4 through the other side. The three pairs of spur gears 1 23 respectively penetrate the three pairs of lifting slots 22. A support frame 18 is provided on the other side of the stand 4. A turntable 1 25 is rotatably connected to one side of the support frame 18. A turntable 1 27 is rotatably connected to one side of the turntable 1 25. Three straight slots 26 are symmetrically opened on one side of the turntable 1 25. Three arcuate slots 28 are symmetrically opened on one side of the turntable 2 27. A spur gear 2 24 is provided between each pair of spur gears 1 23. The sides of the three spur gears 24 respectively penetrate the three arcuate slots 28 and the three straight slots 26, and are fixedly connected to a limiting rod 30. The rotating turntable 27 drives the three spur gears 24 to rotate synchronously along the center of the turntable 27 through the three arc-shaped slots 28, thereby driving the three pairs of spur gears 1 23 to rotate synchronously, thereby driving the three pairs of forming rollers 11 to rotate synchronously. The rotating forming rollers 11 can directly act on the inner wall of the formed spiral steel belt; When the distance between the three pairs of forming rollers 11 is adjusted by the synchronous adjustment structure 5, the three pairs of spur gears 1 23 are driven to move closer to each other along the three lifting grooves 22. At this time, the adjustment transmission structure 19 is activated to adjust the distance between the three spur gears 2 24, so that the three spur gears 24 can always mesh with the three pairs of spur gears 1 23. The specific operating steps of the adjustment transmission structure 19 are as follows: fix the turntable 1 25, then rotate the turntable 2 27, driving the three arcuate slots 28 to rotate synchronously, thereby forcing the three limiting rods 30 to move closer to each other along the three straight slots 26 through the three arcuate slots 28, thereby driving the three spur gears 24 to move closer to each other, thereby achieving the purpose of adjusting the distance between the three spur gears 24; When the turntable 1 25 is in a rotatable state, rotating the turntable 2 27 will drive the turntable 1 25 to rotate synchronously through the limiting rod 30 , and will also drive the three spur gears 2 24 to rotate synchronously along the center of the turntable 2 27 .

[0024] In this embodiment, the spur gear 1 23 is fixedly connected to the forming roller 11 , and the spur gear 1 23 and the spur gear 2 24 are meshed with each other.

[0025] In this embodiment, three cylinders 21 are fixedly connected to the other side of the support frame 18 at equal intervals. Three sliding blocks 31 are slidably connected to one side of the support frame 18 and extend through the other side. Three slots 29 are equidistantly formed on one side of the turntable 25 and extend through the other side. The sliding blocks 31 are adaptively matched with the slots 29. The output shaft of the cylinder 21 is fixedly connected to the sliding blocks 31. The output shafts of the three cylinders 21 extend, driving the three sliding blocks 31 to slide synchronously along one side of the support frame 18, so that the three sliding blocks 31 are respectively plugged into the three slots 29, thereby fixing the turntable 1 25. At this time, the turntable 2 27 can be rotated to adjust the distance between the three spur gears 2 24.

[0026] In this embodiment, the interior of the stand 4 is rotatably connected to a rotating drum 32, and an oblique tooth groove 34 is formed inside the rotating drum 32. A rotating shaft 35 is provided inside the oblique tooth groove 34. A plurality of through slots 36 are formed equidistantly on the outer surface of the rotating shaft 35. An engaging block 37 is rotatably connected to the top of each through slot 36. A pair of springs 38 are fixedly connected between the bottom of the engaging block 37 and the through slot 36. A connecting shaft 33 is rotatably connected to the other side of the stand 4. A motor 20 is fixedly connected to the center position of the other side of the support frame 18. The output shaft of the motor 20 passes through the turntable 1 25 and is fixedly connected to the turntable 2 27. The turntable 2 27 is fixedly connected to the connecting shaft 33. The motor 20 is started, causing the output shaft of the motor 20 to rotate clockwise, driving the second rotary disc 27 and the connecting shaft 33 to rotate clockwise, and further driving the rotating shaft 35 to rotate clockwise, so that the inclined surface of the meshing block 37 and the tooth surface of the helical tooth groove 34 are pressed against each other, so that the meshing block 37 is completely located inside the through groove 36, making the rotating drum 32 unable to rotate. At this time, only the transmission structure 19 is adjusted to operate, thereby adjusting the distance between the three second spur gears 24; Start the motor 20, driving the output shaft of the motor 20 to rotate counterclockwise, driving the turntable 2 27 and the connecting shaft 33 to rotate counterclockwise, and then driving the rotating shaft 35 to rotate counterclockwise, so that the vertical surface of the engaging block 37 and the vertical surface of the bevel tooth groove 34 squeeze each other, making the engaging block 37 unable to rotate, thereby driving the rotating drum 32 to rotate, so that the bevel gear 2 39 rotates counterclockwise together. At this time, the synchronous adjustment structure 5 and the adjustment transmission structure 19 can operate synchronously, and the spur gear 1 23 and the spur gear 2 24 can move together, and the speed of the two is consistent.

[0027] In this embodiment, the connecting shaft 33 is fixedly connected to the rotating shaft 35 , and the rotating drum 32 is fixedly connected to the second bevel gear 39 .

[0028] In this embodiment, the engagement block 37 is composed of an inclined surface and a vertical edge, and the engagement block 37 is adaptively matched with the oblique tooth groove 34 .

[0029] It should be noted that the present invention is a spiral steel pipe group welding device. When in use, an external device drives the two sets of pinch rollers 2 to rotate, and then the steel strip is placed between the two sets of pinch rollers 2. The steel strip is conveyed forward by the rotation of the two sets of pinch rollers 2. When the steel strip is conveyed to the position of the bottom roller 6, it will first be bent by the bottom roller 6, and then it will be located between the three pairs of forming rollers 11 and the three pressing rollers 12, and will be completely bent and formed by them. The bent steel strip will move along one side of the stand 4 and will be in a rotating forward state. It will then be conveyed by an external conveying device. The bent steel strip will be welded by two arc welding heads 8 to the weld seams of the inner wall and the outer ring, and then the welded steel strip will be cut at equal distances by an external cutting device to form a spiral steel pipe. Since different spiral steel strips have different production standards, their diameters are also different. Through the synchronous adjustment structure 5, the distance between the three connecting frames 10 can be synchronously adjusted, thereby adjusting the distance between the three pairs of forming rollers 11 and the three pressing rollers 12 as a whole, thereby achieving the purpose of adjusting the diameter of the spiral steel pipe. The specific steps of the synchronous adjustment structure 5 are as follows: Rotating the bevel gear 2 39 drives the three bevel gears 15 to rotate synchronously, thereby driving the three double-threaded screws 14 to rotate synchronously, so that the three sliders 17 slide synchronously along the three chutes 13 respectively, thereby driving the three connecting frames 10 to adjust the distance between them synchronously, thereby achieving the purpose of adjusting the diameter of the produced spiral steel pipe. The self-locking ability of the double-threaded screw 14 can fix the slider 17 at any position of the chute 13, thereby eliminating the need for an additional fixing structure. Before being conveyed to the bottom roller 6 by the two sets of pinch rollers 2, the steel strip will first pass through two sets of pre-bending rollers 9. Since the two sets of pre-bending rollers 9 are arranged in an arc shape, the steel strip will be pre-bent by the two sets of pre-bending rollers 9 so that it can be conveyed to the position of the bottom roller 6 at a certain angle; The rotating turntable 27 drives the three spur gears 24 to rotate synchronously along the center of the turntable 27 through the three arc-shaped slots 28, thereby driving the three pairs of spur gears 1 23 to rotate synchronously, thereby driving the three pairs of forming rollers 11 to rotate synchronously. The rotating forming rollers 11 can directly act on the inner wall of the formed spiral steel belt; When the distance between the three pairs of forming rollers 11 is adjusted by the synchronous adjustment structure 5, the three pairs of spur gears 1 23 are driven to move closer to each other along the three lifting grooves 22. At this time, the adjustment transmission structure 19 is activated to adjust the distance between the three spur gears 2 24, so that the three spur gears 24 can always mesh with the three pairs of spur gears 1 23. The specific operating steps of the adjustment transmission structure 19 are as follows: fix the turntable 1 25, then rotate the turntable 2 27, driving the three arcuate slots 28 to rotate synchronously, thereby forcing the three limiting rods 30 to move closer to each other along the three straight slots 26 through the three arcuate slots 28, thereby driving the three spur gears 24 to move closer to each other, thereby achieving the purpose of adjusting the distance between the three spur gears 24; When the turntable 1 25 is in a rotatable state, rotating the turntable 2 27 will drive the turntable 1 25 to rotate synchronously through the limiting rod 30, and will also drive the three spur gears 2 24 to rotate synchronously along the center of the turntable 2 27; The motor 20 is started, causing the output shaft of the motor 20 to rotate clockwise, driving the second rotary disc 27 and the connecting shaft 33 to rotate clockwise, and further driving the rotating shaft 35 to rotate clockwise, so that the inclined surface of the meshing block 37 and the tooth surface of the helical tooth groove 34 are pressed against each other, so that the meshing block 37 is completely located inside the through groove 36, making the rotating drum 32 unable to rotate. At this time, only the transmission structure 19 is adjusted to operate, thereby adjusting the distance between the three second spur gears 24; Start the motor 20, driving the output shaft of the motor 20 to rotate counterclockwise, driving the turntable 2 27 and the connecting shaft 33 to rotate counterclockwise, and then driving the rotating shaft 35 to rotate counterclockwise, so that the vertical surface of the engaging block 37 and the vertical surface of the bevel tooth groove 34 squeeze each other, making the engaging block 37 unable to rotate, thereby driving the rotating drum 32 to rotate, so that the bevel gear 2 39 rotates counterclockwise together. At this time, the synchronous adjustment structure 5 and the adjustment transmission structure 19 can operate synchronously, and the spur gear 1 23 and the spur gear 2 24 can move together, and the speed of the two is consistent.

[0030] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A spiral steel pipe butt welding device, comprising two pinching brackets (1), wherein two upper and lower groups of pinching rollers (2) are rotatably connected between the two pinching brackets (1), one end of each pinching roller (2) passes through one end of the pinching bracket (1) and is fixedly connected to a pinching gear, and the two upper and lower adjacent pinching gears are meshed with each other, characterized in that: A stand (4) is provided at the rear of the clamping bracket (1), a bottom roller (6) is fixedly connected to one side of the stand (4), a welding bracket (7) is fixedly connected to one side of the stand (4) and located at the top and bottom of the bottom roller (6), arc welding joints (8) are fixedly connected to the adjacent surfaces of the two welding brackets (7), and a synchronous adjustment structure (5) is provided on one side of the stand (4); The synchronous adjustment structure (5) includes three connecting frames (10), three slide grooves (13) are opened on one side of the interior of the vertical frame (4), the interiors of the three slide grooves (13) are rotatably connected to double-threaded screw rods (14), the interiors of the three slide grooves (13) are slidably connected to sliders (17), the three connecting frames (10) are fixedly connected to the three sliders (17), one side of each connecting frame (10) is fixedly connected to a pressure roller (12), and one side of each connecting frame (10) is rotatably connected to a pair of forming rollers (11).

2. The spiral steel pipe butt welding device according to claim 1, characterized in that: A placement groove (16) is provided inside the stand (4), and bevel gears (15) are fixedly connected to the adjacent ends of the three double-threaded screw rods (14) and located inside the placement groove (16). A bevel gear (39) is provided on one side of the placement groove (16), and the bevel gear (39) is meshed with the three bevel gears (15) at the same time.

3. The spiral steel pipe butt welding device according to claim 1, characterized in that: The slider (17) is threadedly connected to the double-threaded screw rod (14), and the three connecting frames (10) are symmetrically arranged in a regular triangle around the center of the vertical frame (4).

4. The spiral steel pipe butt welding device according to claim 1, characterized in that: A pair of pre-bending brackets (3) are provided between the clamping bracket (1) and the vertical frame (4), and two groups of pre-bending rollers (9) are fixedly connected between the pair of pre-bending brackets (3), and both groups of pre-bending rollers (9) are arranged in an arc shape.

5. The spiral steel pipe butt welding device according to claim 1, characterized in that: The other side of the stand (4) is provided with an adjustment transmission structure (19), which includes three pairs of spur gears (23). One side of the stand (4) is penetrated by the other side and three pairs of lifting slots (22) are opened. The three pairs of spur gears (23) respectively penetrate the three pairs of lifting slots (22). The other side of the stand (4) is provided with a support frame (18). One side of the support frame (18) is rotatably connected to a turntable (25). One side of the turntable (25) is rotatably connected to a turntable (27). One side of the turntable (25) penetrates the other side and three straight slots (26) are symmetrically opened. One side of the turntable (27) penetrates the other side and three arcuate slots (28) are symmetrically opened. A spur gear (24) is provided between each pair of spur gears (23). The sides of the three spur gears (24) respectively penetrate the three arcuate slots (28) and the three straight slots (26). The limiting rods (30) are fixedly connected to the sides.

6. The spiral steel pipe butt welding device according to claim 5, characterized in that: The spur gear 1 (23) is fixedly connected to the forming roller (11), and the spur gear 1 (23) and the spur gear 2 (24) are meshed with each other.

7. The spiral steel pipe butt welding device according to claim 5, characterized in that: The other side of the support frame (18) is fixedly connected with three cylinders (21) at equal intervals, one side of the support frame (18) passes through the other side and is slidably connected with three sliding blocks (31), one side of the turntable (25) passes through the other side and is provided with three slots (29) at equal intervals, the sliding blocks (31) are adaptively matched with the slots (29), and the output shaft of the cylinder (21) is fixedly connected to the sliding blocks (31).

8. The spiral steel pipe butt welding device according to claim 5, characterized in that: The interior of the stand (4) is rotatably connected to a rotating drum (32), an oblique tooth groove (34) is provided through the interior of the rotating drum (32), a rotating shaft (35) is provided inside the oblique tooth groove (34), a plurality of through grooves (36) are provided through the interior of the rotating shaft (35) at equal intervals on the outer surface, an engaging block (37) is rotatably connected to the top of each through groove (36), a pair of springs (38) are fixedly connected between the bottom of the engaging block (37) and the through groove (36), the interior of the stand (4) is rotatably connected to the other side with a connecting shaft (33), the center position of the other side of the support frame (18) is fixedly connected to a motor (20), the output shaft of the motor (20) passes through the turntable 1 (25) and is fixedly connected to the turntable 2 (27), and the turntable 2 (27) is fixedly connected to the connecting shaft (33).

9. The spiral steel pipe butt welding device according to claim 8, characterized in that: The connecting shaft (33) is fixedly connected to the rotating shaft (35), and the rotating drum (32) is fixedly connected to the second bevel gear (39).

10. The spiral steel pipe butt welding device according to claim 8, characterized in that: The engagement block (37) is composed of an inclined surface and a vertical edge, and the engagement block (37) is adaptively matched with the oblique tooth groove (34).

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