Correcting device for welding large-diameter steel pipes

Abstract

This utility model discloses a calibration device for welding large-diameter steel pipes, including a first calibration seat and a second calibration seat. The first calibration seat is movably installed on one side of the second calibration seat. The device is characterized by: a first support seat installed at one end of the first calibration seat, and a second support seat installed at one end of the second calibration seat; the middle portions of the first calibration seat, the first support seat, the second calibration seat, and the second support seat are all concave structures; two sets of side-rotating clamping plates are movably installed on the upper portions of both the first and second support seats, symmetrically arranged between them; two sets of drive wheels are movably installed in the middle portions of both the first and second calibration seats; and two sets of movable clamping plates are movably installed on the upper ends of both the first and second calibration seats, symmetrically arranged between them; a limit slide is movably installed on one side of each movable clamping plate. This utility model can meet the rotational adjustment operations for different welding structures, enabling precise alignment of the steel pipe weld.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe welding technology, and in particular to a correction device for welding large-diameter steel pipes. Background Technology

[0002] Correction devices for welding large-diameter steel pipes are of great significance in industrial production, especially in industrial manufacturing and construction projects such as large chemical containers, large pipelines, steel pipe arches for bridges, or steel pipe lattice piers. These fields often use large-diameter steel pipe structures, but due to limitations in steel plate width and pipe rolling equipment capabilities, the length of a single pipe often cannot meet actual needs. Therefore, multiple single pipes need to be welded together. This places high demands on welding quality and the roundness of the steel pipes, and correction devices can effectively solve these problems.

[0003] Application document CN108000044A discloses a large-diameter steel pipe welding device, including a base, a support, a welding mechanism, a motor, and two opposing support frames. The support is located on the base, the welding mechanism is fixed to the support, and the support frames are located on both sides of the welding mechanism. The motor is connected to the welding mechanism via wiring. This invention provides a large-diameter steel pipe welding device with support frames and a welding mechanism. The welding mechanism performs welding through the cooperation of a welding unit and a track. During the welding process, the welding unit operates around the steel pipe on the track, avoiding errors caused by manual operation and improving welding quality.

[0004] The aforementioned device has certain shortcomings when performing welding and straightening operations on large-diameter steel pipes. It lacks a rotation adjustment structure, limiting its applicability to welding and straightening operations on large-diameter steel pipes with round openings. Furthermore, it is not suitable for applications such as... Figure 7 When using B and C type steel pipe structures, the two steel pipes need to be rotated and adjusted to allow the ends of their beveled or curved structures to be joined. Secondly, traditional devices lack an adjustable support structure, which prevents the limiting structure from fully conforming to the side of the steel pipe when correcting pipes of different diameters. This causes large-diameter steel pipes to tilt, affecting the correcting and joining effect. Furthermore, traditional devices cannot meet the requirements of… Figure 7 The welding operation of steel pipe structures of types B and C is not flexible due to the non-circular structure of the welding position. This requires flexible adjustment of the welding torch position, which reduces the flexibility of the welding operation and cannot meet the welding treatment of various pipe head structures. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a correction device for welding large-diameter steel pipes to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a calibration device for welding large-diameter steel pipes, including a first calibration seat and a second calibration seat, wherein the first calibration seat is movably installed on one side of the second calibration seat, characterized in that: a first support seat is installed at one end of the first calibration seat, and a second support seat is installed at one end of the second calibration seat; the middle parts of the first calibration seat, the first support seat, the second calibration seat, and the second support seat are all concave structures; two sets of side-rotating clamping plates are movably installed on the upper parts of the first support seat and the second support seat, and the two sets of side-rotating clamping plates are symmetrically arranged; two sets of drive wheels are movably installed on the middle parts of the first calibration seat and the second calibration seat; two sets of movable clamping plates are movably installed on the upper ends of the first calibration seat and the second calibration seat, and the two sets of movable clamping plates are symmetrically arranged; and a limit slide is movably installed on one side of each movable clamping plate.

[0007] Preferably, one set of drive wheel input ends is connected to the output end of the second motor, and the movable clamping plate and the first calibration seat, as well as the movable clamping plate and the second calibration seat, are all movably connected by a transverse sliding sleeve.

[0008] Preferably, a first motor is provided in the middle of both the first calibration seat and the second calibration seat, and the output shaft of the first motor is connected to one end of the transverse lead screw, and the surface of the transverse lead screw is threaded with the inside of the transverse sliding sleeve.

[0009] Preferably, the movable clamp is provided with a vertical lead screw, the surface of the vertical lead screw is provided with a vertical sliding sleeve that is threaded to it, one side of the vertical sliding sleeve is connected to the limiting slide, and the top of the vertical lead screw is connected to the output shaft of the third motor.

[0010] Preferably, two sets of movable sliders are movably installed on the inner side of the limiting slide block, and positioning rollers are movably installed on the inner side of the movable sliders. Threaded sleeves are installed at the rear ends of the two sets of movable sliders, and the threaded sleeves are threadedly connected to a bidirectional lead screw. The input end of the bidirectional lead screw is connected to the output shaft of the drive motor.

[0011] Preferably, a side-rotating telescopic strut is hinged between the first support base and the side-rotating plate, and between the second support base and the side-rotating plate. Two sets of rollers are movably installed in the middle of the first support base and the second support base. The first support base and the second support base are both hinged to one side of the corresponding side-rotating plate.

[0012] Preferably, multiple sets of side-rotating rollers are movably mounted on the upper side of the side-rotating plate.

[0013] Preferably, a welder is provided between the first calibration seat and the second calibration seat. The welder includes an electric actuator, a slide rail, and a welding torch. The electric actuator is movably mounted on one side of the slide rail, and the welding torch is mounted on the telescopic end of the electric actuator.

[0014] Preferably, a linear motor is installed between the electric actuator and the slide rail, a rotating seat is provided at one end of the slide rail, and a rotary motor is provided at the other end of the slide rail.

[0015] Preferably, the first calibration seat and the second calibration seat are driven by a telescopic rod, and the first calibration seat and the first support seat, as well as the second calibration seat and the second support seat, are fixedly connected by a connecting rod. The mounting plate of the rotary motor is fixedly connected to the side of the second calibration seat, the output shaft of the rotary motor is fixedly connected to the other end of the slide rail, one end of the slide rail is rotatably connected to the rotary seat, and the outer surface of the rotary seat slides in cooperation with the slide groove opened inside the first calibration seat.

[0016] The beneficial effects of this utility model are:

[0017] 1. By setting a first calibration seat and a second calibration seat, this utility model enables the large-diameter steel pipe welding correction device to have a rotation adjustment structure when in use, which can meet the rotation adjustment operation of different welding structures, so that the steel pipe weld seam is accurately aligned.

[0018] 2. By setting a first support base and a second support base, this utility model provides an adjustable V-shaped support structure for the correction device used for welding large-diameter steel pipes. The support structure can be adjusted according to the diameter of the steel pipe, thereby improving the stability of the welding operation.

[0019] 3. By setting up a welding device, this utility model optimizes the use of the alignment and rotation adjustment structure when the large-diameter steel pipe welding correction device is used, so that it can meet the welding operations of different structures and improve its applicability. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the correction device for welding large-diameter steel pipes according to this utility model;

[0022] Figure 2 This is a plan view of the first calibration seat in the calibration device for welding large-diameter steel pipes of this utility model;

[0023] Figure 3 This is an overall structural diagram of the limiting slide in the correction device for welding large-diameter steel pipes of this utility model;

[0024] Figure 4 This is a plan view of the movable slider in the correction device for welding large-diameter steel pipes of this utility model;

[0025] Figure 5 This is a plan view of the second support seat in the correction device for welding large-diameter steel pipes of this utility model;

[0026] Figure 6 This is a plan view of the welder in the correction device for welding large-diameter steel pipes of this utility model;

[0027] Figure 7 This is a schematic diagram of the steel pipe structure to which the correction device for welding large-diameter steel pipes of this utility model is applicable;

[0028] In the diagram: 1. First support seat; 2. Connecting rod; 3. First calibration seat; 4. Welding device; 5. Second calibration seat; 6. Second support seat; 7. Telescopic rod; 8. Moving clamp; 9. Side-rotating clamp; 10. First motor; 101. Horizontal lead screw; 11. Drive wheel; 12. Second motor; 13. Limiting slide; 14. Vertical lead screw; 141. Third motor; 15. Steel pipe fitting; 16. Horizontal sliding sleeve; 17. Vertical sliding sleeve; 18. Moving slider; 19. Threaded sleeve; 191. Bidirectional lead screw; 20. Positioning chuck; 21. Roller; 22. Side-rotating chuck; 23. Rotary motor; 24. Side-rotating telescopic support rod; 25. Electric actuator; 26. Rotary seat; 27. Linear motor; 28. Welding torch; 29. ​​Slide rail. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-7 As shown, a calibration device for welding large-diameter steel pipes includes a first calibration seat 3 and a second calibration seat 5. The first calibration seat 3 is movably mounted on one side of the second calibration seat 5. The device is characterized in that: a first support seat 1 is installed at one end of the first calibration seat 3, and a second support seat 6 is installed at one end of the second calibration seat 5. The middle portions of the first calibration seat 3, the first support seat 1, the second calibration seat 5, and the second support seat 6 are all concave structures. Two sets of side-rotating clamping plates 9 are movably mounted on the upper portions of both the first support seat 1 and the second support seat 6, and the two sets of side-rotating clamping plates 9 are symmetrically arranged. Two sets of drive wheels 11 are movably mounted on the middle portions of both the first calibration seat 3 and the second calibration seat 5. Two sets of movable clamping plates 8 are movably mounted on the upper ends of both the first calibration seat 3 and the second calibration seat 5, and the two sets of movable clamping plates 8 are symmetrically arranged. A limit slide 13 is movably mounted on one side of each movable clamping plate 8.

[0031] Preferably, the input end of one set of drive wheels 11 is connected to the output end of the second motor 12, and the movable clamping plate 8 and the first calibration seat 3, as well as the movable clamping plate 8 and the second calibration seat 5, are all movably connected by a transverse sliding sleeve 16. When the steel pipe fitting 15 is placed on the upper end of the first calibration seat 3 and the second calibration seat 5, in order to meet the following requirements... Figure 7The docking operation of the B and C type steel pipe structures requires the rotation adjustment of the two steel pipes. The second motor 12, in conjunction with the toothed chain structure, drives a set of drive wheels 11 to rotate. After the drive wheels 11 contact the surface of the steel pipe fitting 15, they can drive the steel pipe fitting 15 to rotate, which facilitates the docking operation of the inclined port and the arc port steel pipe fitting 15.

[0032] Preferably, a first motor 10 is provided in the middle of both the first calibration seat 3 and the second calibration seat 5. The output shaft of the first motor 10 is connected to one end of the transverse lead screw 101, and the surface of the transverse lead screw 101 is threadedly engaged with the inside of the transverse sliding sleeve 16. To meet the rotational adjustment of steel pipe fittings 15 of different sizes, the first motor 10 drives the transverse lead screw 101 to rotate, so that the transverse lead screw 101 synchronously drives the transverse sliding sleeve 16 to move. The two transverse sliding sleeves 16 can drive two sets of moving clamps 8 to move towards each other, so that the two sets of moving clamps 8 are both locked on both sides of the steel pipe fitting 15. In this embodiment, two first motors 10 can be provided to drive the corresponding transverse lead screw 101 to rotate respectively; or the first motor 10 can be a hollow shaft motor with the transverse lead screw 101 fixed inside. In this case, the transverse lead screw 101 is a bidirectional lead screw structure, that is, the screw threads on both sides are opposite in direction.

[0033] Preferably, the movable clamping plate 8 is provided with a vertical lead screw 14, and the surface of the vertical lead screw 14 is provided with a vertical sliding sleeve 17 that is threadedly engaged with it. One side of the vertical sliding sleeve 17 is connected to the limiting slide seat 13, and the top of the vertical lead screw 14 is connected to the output shaft of the third motor 141. Steel pipe fittings 15 of different diameters have different sizes. The setting of the limiting slide seat 13 can improve the clamping and fixing effect of the movable clamping plate 8. When dealing with steel pipe fittings 15 of different sizes, the third motor 141 drives the vertical lead screw 14 to rotate, causing the vertical sliding sleeve 17 to move up and down to adjust the working height of the limiting slide seat 13, so that the limiting slide seat 13 is positioned in the middle of both sides of the steel pipe fitting 15. When the movable clamping plate 8 clamps the steel pipe fitting 15, the limiting slide seat 13 can be locked in the middle of the side of the steel pipe fitting 15, improving its fixing effect.

[0034] Preferably, two sets of movable sliders 18 are movably mounted on the inner side of the limiting slide block 13. Positioning rollers 20 are movably mounted on the inner side of each movable slider 18. Threaded sleeves 19 are mounted on the rear ends of the two sets of movable sliders 18. The threaded sleeves 19 are threadedly connected to a bidirectional lead screw 191, and the input end of the bidirectional lead screw 191 is connected to the output shaft of the drive motor. To meet the rotational adjustment requirements of the steel pipe fitting 15, positioning rollers 20 are added, allowing them to contact the surface of the steel pipe fitting 15. During rotation, this provides auxiliary positioning for the steel pipe fitting 15. Simultaneously, when the drive motor drives the bidirectional lead screw 191, the threaded sleeves 19 can cause the two movable sliders 18 to move in opposite directions. This allows the positions of the two sets of positioning rollers 20 to be adjusted according to the size of the steel pipe fitting 15, ensuring that both positioning rollers 20 are in contact with the surface of the steel pipe fitting 15, thus adapting to fixing structures with different curvatures.

[0035] Preferably, a side-rotating telescopic strut 24 is hinged between the first support base 1 and the side-rotating plate 9, and between the second support base 6 and the side-rotating plate 9. Two sets of rollers 21 are movably installed in the middle of the first support base 1 and the second support base 6. The first support base 1 and the second support base 6 are both hinged to one side of the corresponding side-rotating plate 9.

[0036] Preferably, multiple sets of side-rotating chucks 22 are movably mounted on the upper side of the side-rotating chuck plate 9.

[0037] In the above technical solution, to meet the rotational support requirements of steel pipe fittings 15 with different diameters, a first support seat 1 and a second support seat 6 are provided. The steel pipe fitting 15 is placed in the middle of the first support seat 1 and the second support seat 6, so that the steel pipe fitting 15 and the roller 21 are in contact. At the same time, the side-rotating telescopic support rod 24 can adjust the operating angle of the side-rotating clamping plate 9. The side-rotating clamping plate 9 is in movable contact with the side of the steel pipe fitting 15 by using the side-rotating clamping wheel 22. The two sets of side-rotating clamping plates 9 with adjustable angles form an adjustable V-shaped support structure. The operating angle of the side-rotating clamping plate 9 can be adjusted according to the size of the steel pipe fitting 15. The side-rotating clamping wheel 22 of the side-rotating clamping plate 9 is attached to the side of the steel pipe fitting 15. The side-rotating telescopic support rod 24 can be adjusted according to its length changes, and the setting of the side-rotating clamping wheel 22 can keep the steel pipe fitting 15 in a rotating state, reducing the surface friction of the steel pipe fitting 15. In this embodiment, the side-rotating telescopic support rod 24 can be an electric push rod or a hydraulic cylinder structure.

[0038] Preferably, a welder 4 is disposed between the first calibration seat 3 and the second calibration seat 5. The welder 4 includes an electric actuator 25, a slide rail 29, and a welding torch 28. The electric actuator 25 is movably mounted on one side of the slide rail 29, and the welding torch 28 is mounted on the telescopic end of the electric actuator 25. To meet the requirements... Figure 7The welding operation of B and C type steel pipes is carried out by means of a sloping and arc-shaped structure at the weld joint. The welding position of the welding torch 28 can be arbitrarily adjusted according to the change of the weld position when the steel pipe 15 is rotated by using the slide rail 29. Secondly, the electric push rod 25 can drive the displacement of the welding torch 28, so that the welding torch 28 can be arbitrarily adjusted according to the diameter of the steel pipe 15.

[0039] Preferably, a linear motor 27 is installed between the electric actuator 25 and the slide rail 29. A rotating seat 26 is provided at one end of the slide rail 29, and a rotary motor 23 is provided at the other end. The rotary motor 23 drives the slide rail 29 to rotate, and in conjunction with the rotating seat 26, the angle of the slide rail 29 is adjusted, thereby adjusting the welding angle of the welding torch 28. This allows the welding torch 28 to be adjusted to any angle according to the size of the steel pipe fitting 15, and to perform various welding operations as the steel pipe fitting 15 rotates. Figure 7 The welding operation of A / B and C type steel pipe fittings 15 is performed. A linear motor 27 can drive an electric actuator 25 to move linearly along a slide rail 29, thereby adjusting the horizontal displacement of the welding torch 28.

[0040] Preferably, the first calibration seat 3 and the second calibration seat 5 are driven by a telescopic rod 7, and the first calibration seat 3 and the first support seat 1, as well as the second calibration seat 5 and the second support seat 6, are fixedly connected by a connecting rod 2. The mounting plate of the rotary motor 23 is fixedly connected to the side of the second calibration seat 5, the output shaft of the rotary motor 23 is fixedly connected to the other end of the slide rail 29, one end of the slide rail 29 is rotatably connected to the rotary seat 26, and the outer surface of the rotary seat 26 is slidably engaged with the groove opened inside the first calibration seat 3. In use, by setting up a first calibration seat 3 and a second calibration seat 5, the large-diameter steel pipe welding correction device has a rotation adjustment structure, which can meet the rotation adjustment operation of different welding structures, so that the steel pipe weld seam is accurately aligned. The telescopic rod 7 is used to easily adjust the distance between the first calibration seat 3 and the second calibration seat 5, thereby changing the gap between the two steel pipes to be welded. In addition, in order not to affect the extension and retraction process of the telescopic rod 7, the outer surface of the rotating seat 26 is slidably engaged with the sliding groove opened inside the first calibration seat 3. In this embodiment, the rotating seat 26 can be a bearing structure, with its inner side connected to one end of the slide rail 29 and its outer side slidably engaged with the sliding groove, thereby realizing its rotation and sliding functions. In this embodiment, the telescopic rod is a hydraulic cylinder or electric push rod structure.

[0041] The working principle of this utility model is as follows:

[0042] During operation, in order to meet such Figure 7The docking operation of the B and C type steel pipe structures requires the rotation adjustment of the two steel pipes. The second motor 12, in conjunction with the toothed chain structure, drives a set of drive wheels 11 to rotate. After the drive wheels 11 contact the surface of the steel pipe fitting 15, they can drive the steel pipe fitting 15 to rotate, which facilitates the docking operation of the inclined port and the arc port steel pipe fitting 15. Secondly, in order to adapt to the rotation adjustment of steel pipe fittings 15 of different sizes, the first motor 10 drives the transverse lead screw 101 to rotate, so that the transverse lead screw 101 synchronously drives the transverse sliding sleeve 16 to move. The two transverse sliding sleeves 16 can drive the two sets of moving clamps 8 to move towards each other, so that the two sets of moving clamps 8 are both locked on both sides of the steel pipe fitting 15. In this embodiment, two first motors 10 can be set to drive the corresponding transverse lead screw 101 to rotate respectively; or the first motor 10 can be a hollow shaft motor with the transverse lead screw 101 fixed inside. In this case, the transverse lead screw 101 is a bidirectional lead screw structure, that is, the screw threads on both sides are opposite.

[0043] The steel pipe fittings 15 of different diameters are of different sizes. The setting of the limiting slide 13 can improve the clamping and fixing effect of the moving clamp 8. When dealing with steel pipe fittings 15 of different sizes, the third motor 141 drives the vertical screw 14 to rotate, so that the vertical sliding sleeve 17 moves up and down to adjust the working height of the limiting slide 13, so that the limiting slide 13 is in the middle position on both sides of the steel pipe fitting 15. When the moving clamp 8 clamps the steel pipe fitting 15, the limiting slide 13 can be stuck in the middle position on the side of the steel pipe fitting 15, thus improving its fixing effect.

[0044] To facilitate the rotational adjustment of the steel pipe fitting 15, positioning rollers 20 are added. These rollers contact the surface of the steel pipe fitting 15, providing auxiliary positioning during rotation. Simultaneously, when the drive motor rotates the bidirectional lead screw 191, the threaded sleeve 19 drives the two moving sliders 18 to move in opposite directions. This allows the positions of the two sets of positioning rollers 20 to be adjusted according to the size of the steel pipe fitting 15, ensuring that both rollers 20 are in contact with the surface of the steel pipe fitting 15. This accommodates fixing structures with different curvatures, thus satisfying the rotational adjustment requirements of steel pipe structures of different diameters. Figure 7 The B and C type steel pipe structures use inclined and arc-shaped joints, which can effectively increase the welding contact surface and improve the stability of the steel pipe after welding compared with the traditional ring welding structure.

[0045] By setting the first support seat 1 and the second support seat 6, the correction device for welding large-diameter steel pipes has an adjustable V-shaped support structure when in use. The support structure can be adjusted according to the diameter of the steel pipe, thereby improving the stability of the welding operation.

[0046] In use, to meet the rotational support requirements of steel pipe fittings 15 with different diameters, a first support seat 1 and a second support seat 6 are set up. The steel pipe fitting 15 is placed in the middle of the first support seat 1 and the second support seat 6, so that the steel pipe fitting 15 and the roller 21 are in contact. At the same time, the side-rotating telescopic support rod 24 can adjust the use angle of the side-rotating clamping plate 9. The side-rotating clamping plate 9 is in movable contact with the side of the steel pipe fitting 15 by the side-rotating clamping wheel 22. The two sets of side-rotating clamping plates 9 with adjustable angles form an adjustable V-shaped support structure. The use angle of the side-rotating clamping plate 9 can be adjusted according to the size of the steel pipe fitting 15. The side-rotating clamping wheel 22 of the side-rotating clamping plate 9 fits against the side of the steel pipe fitting 15. The side-rotating telescopic support rod 24 can be adjusted according to its length changes, and the setting of the side-rotating clamping wheel 22 can keep the steel pipe fitting 15 in a rotating state, reducing the surface friction of the steel pipe fitting 15.

[0047] By setting up the welder 4, the use of the alignment rotation adjustment structure is optimized when the large-diameter steel pipe welding correction device is used, so that it can meet the welding operations of different structures and improve its applicability.

[0048] During operation, in order to meet such Figure 7 The welding operation of B and C type steel pipes is carried out by means of a sloping and arc-shaped structure at the weld joint. The welding position of the welding torch 28 can be arbitrarily adjusted according to the change of the weld position when the steel pipe 15 is rotated by using the slide rail 29. Secondly, the electric push rod 25 can drive the displacement of the welding torch 28, so that the welding torch 28 can be arbitrarily adjusted according to the diameter of the steel pipe 15.

[0049] The rotary motor 23 drives the slide rail 29 to rotate, and in conjunction with the rotating base 26, the angle of the slide rail 29 is adjusted, thereby adjusting the welding angle of the welding torch 28. This allows the welding torch 28 to be adjusted to any angle according to the size of the steel pipe fitting 15, and to perform various welding operations as the steel pipe fitting 15 rotates. Figure 7 Welding operations for A / B and C type steel pipe fittings 15.

[0050] In use, by setting the first calibration seat 3 and the second calibration seat 5, the large-diameter steel pipe welding correction device has a rotation adjustment structure, which can meet the rotation adjustment operation of different welding structures, so that the steel pipe weld seam is accurately aligned. The telescopic rod 7 is used to adjust the distance between the first calibration seat 3 and the second calibration seat 5, thereby changing the gap between the two steel pipes to be welded. In addition, in order not to affect the extension and retraction process of the telescopic rod 7, the outer surface of the rotating seat 26 is slidably engaged with the sliding groove opened inside the first calibration seat 3. In this embodiment, the rotating seat 26 can be a bearing structure, with its inner side connected to one end of the slide rail 29 and its outer side slidably engaged with the sliding groove, thereby realizing its rotation and sliding functions.

[0051] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A calibration device for welding large-diameter steel pipes, comprising a first calibration seat (3) and a second calibration seat (5), wherein the first calibration seat (3) is movably mounted on one side of the second calibration seat (5), characterized in that: The first calibration seat (3) is equipped with a first support seat (1) at one end, and the second calibration seat (5) is equipped with a second support seat (6) at one end. The middle of the first calibration seat (3), the first support seat (1), the second calibration seat (5) and the second support seat (6) are all concave structures. The upper part of the first support seat (1) and the second support seat (6) are movably equipped with two sets of side-rotating clamping plates (9). The two sets of side-rotating clamping plates (9) are symmetrically arranged. The middle part of the first calibration seat (3) and the second calibration seat (5) are movably equipped with two sets of drive wheels (11). The upper end of the first calibration seat (3) and the second calibration seat (5) are movably equipped with two sets of movable clamping plates (8). The two sets of movable clamping plates (8) are symmetrically arranged. A limit slide (13) is movably installed on one side of the movable clamping plate (8).

2. The calibration device for welding large-diameter steel pipes according to claim 1, characterized in that: One set of drive wheels (11) has its input end connected to the output end of the second motor (12). The movable clamp (8) and the first calibration seat (3), as well as the movable clamp (8) and the second calibration seat (5), are all movably connected by a transverse sliding sleeve (16).

3. The calibration device for welding large-diameter steel pipes according to claim 2, characterized in that: The first calibration seat (3) and the second calibration seat (5) are each provided with a first motor (10). The output shaft of the first motor (10) is connected to one end of the transverse lead screw (101). The surface of the transverse lead screw (101) is threaded with the inside of the transverse sliding sleeve (16).

4. The calibration device for welding large-diameter steel pipes according to claim 1, characterized in that: The movable clamp (8) is provided with a vertical lead screw (14), and the surface of the vertical lead screw (14) is provided with a vertical sliding sleeve (17) that is threaded to it. One side of the vertical sliding sleeve (17) is connected to the limiting slide (13), and the top of the vertical lead screw (14) is connected to the output shaft of the third motor (141).

5. The calibration device for welding large-diameter steel pipes according to claim 4, characterized in that: Two sets of movable sliders (18) are movably installed on the inner side of the limiting slide block (13). Positioning rollers (20) are movably installed on the inner side of the movable sliders (18). Threaded sleeves (19) are installed at the rear ends of the two sets of movable sliders (18). The threaded sleeves (19) are threadedly connected to the bidirectional lead screw (191). The input end of the bidirectional lead screw (191) is connected to the output shaft of the drive motor.

6. The calibration device for welding large-diameter steel pipes according to claim 1, characterized in that: A side-rotating telescopic strut (24) is hinged between the first support base (1) and the side-rotating plate (9) and the second support base (6) and the side-rotating plate (9). Two sets of rollers (21) are movably installed in the middle of the first support base (1) and the second support base (6). The first support base (1) and the second support base (6) are both hinged to one side of the corresponding side-rotating plate (9).

7. The calibration device for welding large-diameter steel pipes according to claim 6, characterized in that: Multiple sets of side-rotating chucks (22) are movably installed on the upper side of the side-rotating chuck (9).

8. The calibration device for welding large-diameter steel pipes according to claim 1, characterized in that: A welder (4) is provided between the first calibration seat (3) and the second calibration seat (5). The welder (4) includes an electric push rod (25), a slide rail (29) and a welding torch (28). The electric push rod (25) is movably installed on one side of the slide rail (29), and the welding torch (28) is installed on the telescopic end of the electric push rod (25).

9. The calibration device for welding large-diameter steel pipes according to claim 8, characterized in that: A linear motor (27) is installed between the electric actuator (25) and the slide rail (29). A rotating seat (26) is provided at one end of the slide rail (29), and a rotary motor (23) is provided at the other end of the slide rail (29).

10. The calibration device for welding large-diameter steel pipes according to claim 9, characterized in that: The first calibration seat (3) and the second calibration seat (5) are driven by a telescopic rod (7). The first calibration seat (3) and the first support seat (1), as well as the second calibration seat (5) and the second support seat (6), are connected and fixed by a connecting rod (2). The mounting plate of the rotary motor (23) is fixedly connected to the side of the second calibration seat (5). The output shaft of the rotary motor (23) is fixedly connected to the other end of the slide rail (29). One end of the slide rail (29) is rotatably connected to the rotary seat (26). The outer surface of the rotary seat (26) slides in cooperation with the groove opened inside the first calibration seat (3).

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