Positioning device for welding of large-diameter tower drum

Abstract

The utility model relates to the field of wind power towers, in particular to a positioning device for welding a large-diameter tower, which comprises a track, an auxiliary frame mechanism and at least two roller carrier mechanisms arranged on two sides of the auxiliary frame mechanism at intervals respectively, and traveling mechanisms matched with the track are connected to two sides of the bottoms of the auxiliary frame mechanism and the roller carrier mechanisms respectively. The roller frame mechanism comprises a U-shaped base and swing type roller assemblies symmetrically connected to the inner side of the U-shaped base. The axial positioning assembly is driven by the driving assembly to rotate, the U-shaped positioning plate is rotated to the upper portion and matched with the roundness of the tower drum, meanwhile, the electric push rod is matched to drive the U-shaped positioning plate to move axially, the first guide roller makes contact with the end face of the tower drum and conducts positioning, the alignment tolerance is strictly controlled, and the welding efficiency is greatly improved during welding thermal expansion. The effect of keeping the end face gap constant is achieved, and therefore deviation of the tower drum is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine towers, and in particular to a positioning device for welding large-diameter towers. Background Technology

[0002] The wind turbine tower is an important component of a wind turbine generator set. It is a tall structure that supports the wind turbine nacelle and blades. It is usually made of steel and is cylindrical or conical. Its main function is to raise the wind turbine generator set to a certain height so that the blades can capture more stable and stronger wind energy. At the same time, it bears a variety of complex forces such as the weight of the wind turbine generator set, wind load, and seismic load, ensuring the safe and stable operation of the wind turbine generator set under various operating conditions.

[0003] The wind turbine tower is assembled from multiple segments. The diameter, taper, flange flatness, and other parameters of each segment must be strictly matched. Due to the large size of the tower, significant welding deformation is likely to occur during the welding process. To ensure that each segment is precisely aligned in the axial, radial, and angular directions and to avoid misalignment, twisting, or eccentricity after welding, the tower segments need to be positioned and calibrated during the welding process. The conventional operation method is to use a roller frame and drive the rollers to rotate the workpiece, so that the welding operation can be carried out on the entire circumference of the workpiece, rather than being limited to a point or a line, thereby ensuring the uniformity and consistency of the weld. Therefore, after the tower segment is welded, the assembled tower is usually shifted to one side appropriately, and then new tower segments are added, and the assembly welding work is carried out again, so as to gradually complete the welding operation of the entire tower.

[0004] Regarding the aforementioned technologies, the inventors discovered that during the assembly of new tower sections with existing tower sections, roller frames are needed to adjust the tower to ensure that the edges of the two tower sections are aligned and their centers are relatively parallel. However, traditional roller frames can only adjust the height of the tower to assist in positioning. During the welding process, since the two ends of the tower cannot be effectively fixed and positioned, when the welding heat input causes the tower to expand, the resulting stress will cause the tower to shift slightly. This shift can easily lead to a series of problems, such as misalignment of the weld, the roundness of the cylinder exceeding the standard allowable range, or deviation in the overall length of the tower, thereby affecting the quality of the tower and its subsequent installation and use. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a positioning device for welding large-diameter tower sections, which facilitates the effective fixing and positioning of both ends of the tower section during the welding process, reduces deviations in the tower section, and thus improves the quality of the subsequent tower sections.

[0006] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a positioning device for welding large-diameter towers is provided, comprising: a track, an auxiliary frame mechanism, and at least two roller frame mechanisms respectively spaced apart on both sides of the auxiliary frame mechanism. The auxiliary frame mechanism and the roller frame mechanism are respectively connected to the bottom sides of the track by a traveling mechanism matching the track. The roller frame mechanism includes a U-shaped base and symmetrically connected to the inner side of the base by a swing roller assembly.

[0007] The oscillating roller assembly is equipped with an axial positioning component on the side away from the auxiliary frame mechanism. The axial positioning component includes a U-shaped mounting base and a U-shaped positioning plate slidably mounted on its inner side. A guide roller is rotatably connected to the inner side of the U-shaped positioning plate, and an electric push rod that drives the U-shaped positioning plate to reciprocate is connected to the inner closed end of the U-shaped mounting base.

[0008] It also includes a drive component that drives the axial positioning component to rotate.

[0009] By adopting the above technical solution, the track and traveling mechanism provides a moving foundation for the auxiliary frame mechanism and the roller frame mechanism, realizing the overall position adjustment of the device along the tower axis. The auxiliary frame mechanism can provide temporary support for the middle section of the tower to prevent the long tower from deflecting due to its own weight and ensure the straightness of the cylinder during welding. The roller frame mechanism carries and drives the tower segment to rotate, realizing circumferential welding. The axial positioning component controls the axial alignment and gap of the tower segment end face. The U-shaped positioning plate is driven to move axially by an electric push rod. The guide roller contacts the tower end face to strictly control the misalignment. During welding thermal expansion, the electric push rod adjusts the thrust in real time to drive the U-shaped positioning plate to move and maintain a constant end face gap. The drive component drives the axial positioning component to rotate, so that the axial positioning component rotates synchronously with the tower to maintain the positioning state.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the drive assembly includes a slewing bearing mounted on a U-shaped base, a mounting plate connected to one side of the slewing bearing, the mounting plate being connected to the U-shaped mounting base, a drive gear meshing with the slewing bearing being provided below the slewing bearing, a drive motor four being mounted on one side of the U-shaped base, and the output shaft of the drive motor four being connected to the drive gear.

[0011] By adopting the above technical solution, the drive motor rotates four drive gears, which synchronously drive the slewing bearing to rotate, and drive the mounting plate to rotate during rotation, ensuring that the axial positioning component can move according to the predetermined rotation trajectory and angle, thereby preventing contact with the tower section when it is placed on the roller frame mechanism.

[0012] In a preferred embodiment, the present invention can be further configured such that: a guide rail is symmetrically connected to the inner side of the U-shaped mounting base, and a slider is slidably connected to the guide rail, and the slider is connected to the U-shaped positioning plate.

[0013] By adopting the above technical solution, when the electric push rod drives the U-shaped positioning plate to move, the U-shaped positioning plate synchronously drives the slider to slide on the guide rail. Through precise guidance, the U-shaped positioning plate is prevented from shifting or shaking during movement, making the axial positioning of the tower more accurate, reducing problems such as weld misalignment caused by positioning deviation, and improving the quality of tower welding.

[0014] In a preferred embodiment, the present invention can be further configured as follows: the swing roller assembly includes symmetrically arranged arc-shaped plates, with connecting rods installed between the two ends of the arc-shaped plates, and roller components installed on the inner side of the arc-shaped plates. The opposite side of the arc-shaped plates is connected to a U-shaped base via pins. One end of the U-shaped base is hinged to a telescopic rod that drives the arc-shaped plates to swing. The roller component includes a crossbar and arc-shaped mounting plates connected to its two ends. Rollers are rotatably connected to the inner ends of the arc-shaped mounting plates. A drive motor is connected to the side of the arc-shaped mounting plate away from the axial positioning component. The output shaft of the drive motor is connected to one of the rollers. Two limiting rods are connected below the roller component and to the inner side of the arc-shaped plate.

[0015] By adopting the above technical solution, the arc-shaped plate, as the main structure of the swing roller assembly, provides an installation foundation for components such as the rollers and connecting rods, ensuring the stability and integrity of the entire assembly. Its arc-shaped design better conforms to the shape of the tower, providing uniform support. The arc-shaped plate is connected to the U-shaped base via a pin and can swing under the drive of the telescopic rod, thereby causing the rollers to adapt to changes in the tower's shape and position. When the telescopic rod drives the arc-shaped plate to swing, the connecting rod can evenly transmit force to the two arc-shaped plates, enabling them to swing synchronously. This ensures consistent support and positioning of the tower by the rollers. The rollers support the tower... It provides direct support, enabling the tower to maintain a stable position during welding. This allows the tower to move relatively easily when adjusting its position or undergoing thermal expansion, reducing friction between the tower and the supporting components and preventing surface damage and welding defects caused by friction. The telescopic rod is hinged to one end of the U-shaped base and drives the arc plate to swing through its telescopic movement, thereby adjusting the position and angle of the rollers to adapt to different tower requirements. This ensures that the rollers are evenly distributed around the tower, providing better support. The limiting rod prevents the rollers from moving excessively downwards under excessive force, ensuring the stability of the contact between the rollers and the tower and maintaining the support effect.

[0016] In a preferred embodiment, the present invention can be further configured as follows: the telescopic rod includes a hydraulic cylinder and a mounting ring connected to one end thereto; the other end of the hydraulic cylinder is provided with a connecting seat; one end of the U-shaped base is connected to a hinge seat; the hinge seat and the connecting seat are connected by a pin; and the mounting ring is rotatably connected to the corresponding connecting rod.

[0017] By adopting the above technical solution, the hydraulic cylinder extends and retracts to drive the arc plate to swing, thereby driving the roller components to adjust their position to adapt to different support and positioning requirements of the tower. During this process, the mounting ring allows a certain relative rotation between the hydraulic cylinder and the connecting rod to adapt to the angle change when the arc plate swings, and the connecting seat.

[0018] In a preferred embodiment, the present invention can be further configured as follows: the walking mechanism includes a mounting housing with an opening at the bottom, a plurality of walking wheels are installed at intervals inside the mounting housing, a second drive motor is connected to one side of the mounting housing, and the output shaft of the second drive motor is connected to one of the walking wheels.

[0019] By adopting the above technical solution, the second drive motor drives one of the traveling wheels to rotate. As the traveling wheel contacts and rolls with the surface of the tower, it rotates and adjusts the tower to meet the requirements of different welding positions.

[0020] In a preferred embodiment, the present invention can be further configured as follows: the auxiliary frame mechanism includes a top-opening base, with roller seats symmetrically slidably connected to the top of the base, and inclined guide rollers rotatably mounted on the roller seats. A driving device is connected inside the base to drive the roller seats to move in opposite directions. The driving device includes a bidirectional lead screw, with moving blocks mounted on the positive and negative teeth of the bidirectional lead screw, each moving block connected to a corresponding roller seat. A drive motor is mounted on one side of the base, with the output shaft of the drive motor connected to one end of the bidirectional lead screw. Guide rails are mounted on both sides of the top of the base, with sliders symmetrically slidably connected to each guide rail, each slider connected to a corresponding roller seat.

[0021] By adopting the above technical solution, the base, as the main support structure of the auxiliary frame mechanism, provides an installation platform for other components, ensuring the stability and robustness of the entire mechanism. The roller seat provides an installation position for the inclined guide roller two, enabling the guide roller two to be stably fixed on the base. The drive motor three provides power for the rotation of the bidirectional lead screw and drives the roller seat to move in opposite directions through the moving block, thereby adjusting the position of the roller seat. The guide roller two contacts the surface of the tower and provides guidance to the tower through rolling friction, enabling the tower to move smoothly on the auxiliary frame mechanism.

[0022] In summary, the present invention includes at least one of the following beneficial technical effects of a positioning device for welding large-diameter towers:

[0023] 1. The drive assembly rotates the axial positioning assembly, which rotates the U-shaped positioning plate to the top and matches the roundness of the tower. At the same time, the electric push rod drives the U-shaped positioning plate to move axially, so that the guide roller contacts the end face of the tower and positions it. This strictly controls the misalignment and maintains a constant end face gap during welding thermal expansion, thereby reducing tower deviation and improving the quality of subsequent tower sections. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the roller frame mechanism of this utility model;

[0027] Figure 3 This is a schematic diagram of the axial positioning component of this utility model;

[0028] Figure 4 This is a partial cross-sectional view of the oscillating roller assembly of this utility model;

[0029] Figure 5 This is a schematic diagram of the auxiliary frame mechanism of this utility model;

[0030] Figure 6 for Figure 5 Sectional view of AA;

[0031] Figure 7 This is a schematic diagram of the walking mechanism of this utility model.

[0032] In the diagram: 1. Track; 20. Auxiliary frame mechanism; 30. Roller frame mechanism; 40. Traveling mechanism;

[0033] 21. Base; 22. Roller seat; 23. Guide roller II; 24. Drive unit; 25. Guide rail II; 26. Slider II;

[0034] 31. U-shaped base; 32. Swinging roller assembly; 33. Axial positioning assembly;

[0035] 41. Housing; 42. Wheels; 43. Drive motor II;

[0036] 241. Double-acting lead screw; 242. Moving block; 243. Drive motor three;

[0037] 321. Curved plate; 322. Connecting rod; 323. Roller component; 324. Telescopic rod component; 325. Limiting rod;

[0038] 331. U-shaped mounting base; 332. U-shaped positioning plate; 333. Guide roller one; 334. Electric push rod; 335. Drive assembly; 336. Guide rail one; 337. Slider one;

[0039] 3231. Crossbar; 3232. Arc-shaped mounting plate; 3233. Roller; 3234. Drive motor one;

[0040] 3241, Hydraulic cylinder; 3242, Mounting ring; 3243, Connecting seat; 3244, Hinge seat;

[0041] 3351. Slewing bearing; 3352. Mounting plate; 3353. Drive gear; 3354. Drive motor. Detailed Implementation

[0042] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0043] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0044] Reference Figure 1-7This utility model discloses a positioning device for welding large-diameter towers, comprising: a track 1, an auxiliary frame mechanism 20, and at least two roller frame mechanisms 30 spaced apart on both sides of the auxiliary frame mechanism 20. The auxiliary frame mechanism 20 and the roller frame mechanism 30 are respectively connected to the bottom sides of the track 1 via traveling mechanisms 40. Each roller frame mechanism 30 includes a U-shaped base 31 and symmetrically connected to its inner side by swing-type roller assemblies 32. An axial positioning assembly 33 is installed on the side of the swing-type roller assembly 32 away from the auxiliary frame mechanism 20. The axial positioning assembly 33 includes a U-shaped mounting seat 331 and a U-shaped positioning plate 332 slidably mounted on its inner side. A guide roller 333 is rotatably connected to the inner side of the U-shaped positioning plate 332. The inner closed end of the U-shaped mounting seat 331 is connected to... The electric push rod 334 drives the U-shaped positioning plate 332 to reciprocate. The inner side of the U-shaped mounting base 331 is symmetrically connected with guide rails 336. Slider 337 is slidably connected to the guide rails 336. The sliders 337 are connected to the U-shaped positioning plate 332. The system also includes a drive assembly 335 that drives the axial positioning component 33 to rotate. The drive assembly 335 includes a slewing bearing 3351 mounted on the U-shaped base 31. A mounting plate 3352 is connected to one side of the slewing bearing 3351. The mounting plate 3352 is connected to the U-shaped mounting base 331. A drive gear 3353 is meshed with the slewing bearing 3351 below it. A drive motor 3354 is mounted on one side of the U-shaped base 31. The output shaft of the drive motor 3354 is connected to the drive gear 3353.

[0045] The use of servo motors as drive motors 3354 provides extremely high positioning accuracy for tower welding. After the tower sections are placed on the roller frame mechanism 30 at both ends, the traveling mechanism 40 drives the tower sections to move closer together. At this time, the U-shaped positioning plate 332 is in a downward position. The edge parts are calibrated and positioned by the swinging of the swing roller assembly 32. Then, the drive motors 3354 on the two outermost roller frame mechanisms 30 drive the drive gears 3353 to rotate. The slewing bearing 3351 drives the mounting plate 3352 to move closer to the U-shaped mounting base 331. The guide roller 333 rotates at an angle to precisely match the roundness of the tower, ensuring accurate contact between the guide roller 333 and the tower surface. Simultaneously, the electric push rod 334 drives the U-shaped positioning plate 332 to retract, making the guide roller 333 fit tightly against the tower surface, achieving precise positioning. During tower rotation adjustment and welding, this effectively reduces welding deviations and avoids problems such as welding misalignment and uneven welds caused by inaccurate positioning. This significantly improves the quality of the subsequent tower, ensuring the structural strength and stability of the tower and meeting engineering requirements.

[0046] The oscillating roller assembly 32 includes symmetrically arranged arc-shaped plates 321. Connecting rods 322 are respectively installed between the two ends of the arc-shaped plates 321. Roller components 323 are installed on the inner side of the arc-shaped plates 321. The opposite side of the arc-shaped plates 321 is connected to a U-shaped base 31 via pins. One end of the U-shaped base 31 is hinged to a telescopic rod 324 that drives the arc-shaped plates 321 to oscillate. The roller component 323 includes a crossbar 3231 and arc-shaped mounting plates 3232 respectively connected to its two ends. Rollers 3233 are rotatably connected to the inner ends of the arc-shaped mounting plates 3232. The arc-shaped mounting plates 3232 are fixed away from the axial direction. A drive motor 3234 is connected to one side of the positioning component 33. The output shaft of the drive motor 3234 is connected to one of the rollers 3233. Two limit rods 325 are connected to the rollers 323 and located inside the arc plate 321. The telescopic rod 324 includes a hydraulic cylinder 3241 and a mounting ring 3242 connected to one end of it. The other end of the hydraulic cylinder 3241 is provided with a connecting seat 3243. One end of the U-shaped base 31 is connected to a hinge seat 3244. The hinge seat 3244 and the connecting seat 3243 are connected by a pin. The mounting ring 3242 is rotatably connected to the corresponding connecting rod 322.

[0047] The drive motor 3234 is preferably a servo motor. Reinforcing ribs can also be set between the two ends of the arc-shaped mounting plate 3232. When the tower is located between the corresponding rollers 323, the hydraulic cylinder 3241 extends and retracts to drive the arc plate 321 to swing, thereby driving the rollers 323 to adjust their position so that the edge of the tower can be aligned. After a certain length of welding is completed on the edge of the tower, the drive motor 3234 drives the corresponding rollers 3233 to rotate so that the welded tower can rotate, thereby meeting the subsequent welding requirements.

[0048] The walking mechanism 40 includes a mounting housing 41 with an opening at the bottom. Several walking wheels 42 are installed at intervals inside the mounting housing 41. A second drive motor 43 is connected to one side of the mounting housing 41. The output shaft of the second drive motor 43 is connected to one of the walking wheels 42.

[0049] The second drive motor 43 can be a stepper motor or a servo motor. The second drive motor 43 drives the walking wheel 42 to rotate, thereby driving the entire walking mechanism 40 to move linearly along the track 1, and at the same time driving the corresponding roller frame mechanism 30 to move, so as to adjust the movement of the tower.

[0050] The auxiliary frame mechanism 20 includes a top-opening base 21. Roller seats 22 are symmetrically slidably connected to the top of the base 21. Guide rollers 23 are rotatably mounted on the roller seats 22. A drive device 24 is connected inside the base 21 to drive the roller seats 22 to move in opposite directions. The drive device 24 includes a bidirectional lead screw 241. Moving blocks 242 are respectively installed on the positive and negative teeth of the bidirectional lead screw 241. The moving blocks 242 are respectively connected to the corresponding roller seats 22. A drive motor 243 is installed on one side of the base 21. The output shaft of the drive motor 243 is connected to one end of the bidirectional lead screw 241. Guide rails 25 are respectively installed on both sides of the top of the base 21. Sliding blocks 26 are symmetrically slidably connected on the guide rails 25. The sliding blocks 26 are respectively connected to the corresponding roller seats 22.

[0051] After the two tower sections are welded, the drive motor 243 drives the bidirectional lead screw 241 to rotate, which in turn drives the moving block 242 and the roller seat 22 to move towards each other, so that the guide roller 23 makes precise contact with the tower surface. At the same time, it ensures that the guide roller 23 contacts the tower with appropriate pressure and speed. In addition, the roller frame mechanism 30 of the shorter tower section retracts through the hydraulic cylinder 3241, so that the roller 3233 separates from the tower section surface, while the roller frame mechanism 30 of the other section moves in conjunction with the traveling mechanism 40. At this time, the guide roller 23 rotates to guide and support the welded tower section, so as to maintain a stable position and posture in subsequent operations, reduce quality problems caused by shaking or deviation, and ensure the smooth progress of the entire tower welding process.

[0052] The implementation principle of this embodiment is as follows: During use, in the tower welding preparation process, the roller frame mechanism 30 and the traveling mechanism 40 work together to control the distance and accurately position the tower section. The U-shaped positioning plate 332 is initially in a downward position, which facilitates the subsequent calibration operation of the tower edge. After the traveling mechanism 40 drives the two tower sections to move closer to each other, the hydraulic cylinder 3241 extends and retracts to drive the arc plate 321 to swing, thereby driving the roller component 323 to perform fine position adjustment, so that the tower edge is accurately calibrated, ensuring that the initial position of the tower in the axial and radial directions is accurate. The staff uses calibration rulers or calibration instruments to verify, further eliminating any possible minor errors. After confirming that there are no errors, the outermost two rollers... The drive motor 3354 on the wheel frame mechanism 30 drives the drive gear 3353 to rotate, causing the slewing bearing 3351 to rotate the mounting plate 3352 and the U-shaped mounting seat 331 at an angle to precisely match the roundness of the tower. Then, the electric push rod 334 drives the U-shaped positioning plate 332 to retract, so that the guide roller 333 contacts the surface of the tower and restricts the end of the tower section to achieve the positioning effect. At the same time, the drive motor 3234 drives the corresponding roller 3233 to rotate, so that the welded tower can be rotated and adjusted. During the welding process, it can not only limit the two ends of the tower section, but also provide guidance for the tower in a rolling manner, reduce the deviation of the tower welding, and improve the quality of the subsequent tower.

[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning device for welding large-diameter towers, comprising: The track (1), the auxiliary frame mechanism (20), and the roller frame mechanism (30) which are respectively spaced apart on both sides of the auxiliary frame mechanism (20), wherein the auxiliary frame mechanism (20) and the roller frame mechanism (30) are respectively connected to the bottom sides of the track (1) by a walking mechanism (40) matching the track (1), wherein the roller frame mechanism (30) includes a U-shaped base (31) and a swing roller assembly (32) symmetrically connected to its inner side; The oscillating roller assembly (32) is equipped with an axial positioning assembly (33) on the side away from the auxiliary frame mechanism (20). The axial positioning assembly (33) includes a U-shaped mounting base (331) and a U-shaped positioning plate (332) slidably mounted on its inner side. A guide roller (333) is rotatably connected to the inner side of the U-shaped positioning plate (332). An electric push rod (334) that drives the U-shaped positioning plate (332) to reciprocate is connected to the inner closed end of the U-shaped mounting base (331). It also includes a drive assembly (335) that drives the axial positioning assembly (33) to rotate.

2. The positioning device for welding large-diameter towers according to claim 1, characterized in that, The drive assembly (335) includes a slewing bearing (3351) mounted on a U-shaped base (31). A mounting plate (3352) is connected to one side of the slewing bearing (3351). The mounting plate (3352) is connected to the U-shaped mounting base (331). A drive gear (3353) is provided below the slewing bearing (3351) and meshes with it. A drive motor (3354) is mounted on one side of the U-shaped base (31). The output shaft of the drive motor (3354) is connected to the drive gear (3353).

3. The positioning device for welding large-diameter towers according to claim 1, characterized in that, The inner side of the U-shaped mounting base (331) is symmetrically connected with guide rails (336), and sliders (337) are slidably connected on the guide rails (336). The sliders (337) are connected to the U-shaped positioning plates (332).

4. The positioning device for welding large-diameter towers according to claim 1, characterized in that, The swing roller assembly (32) includes symmetrically arranged arc-shaped plates (321), with connecting rods (322) installed between the two ends of the arc-shaped plates (321). Roller components (323) are installed on the inner side of the arc-shaped plates (321). The opposite sides of the arc-shaped plates (321) are connected to a U-shaped base (31) via pins. One end of the U-shaped base (31) is hinged to a telescopic rod (324) that drives the arc-shaped plates (321) to swing. The roller component (323) includes a crossbar (3231). The device consists of an arc-shaped mounting plate (3232) connected to both ends of the device, and rollers (3233) rotatably connected to the inner ends of the arc-shaped mounting plate (3232). A drive motor (3234) is connected to the side of the arc-shaped mounting plate (3232) away from the axial positioning component (33). The output shaft of the drive motor (3234) is connected to one of the rollers (3233). Two limiting rods (325) are connected to the lower part of the roller (323) and the inner side of the arc-shaped plate (321).

5. A positioning device for welding large-diameter towers according to claim 4, characterized in that, The telescopic rod (324) includes a hydraulic cylinder (3241) and a mounting ring (3242) connected to one end thereto. The other end of the hydraulic cylinder (3241) is provided with a connecting seat (3243). One end of the U-shaped base (31) is connected to a hinge seat (3244). The hinge seat (3244) and the connecting seat (3243) are connected by a pin. The mounting ring (3242) is rotatably connected to the corresponding connecting rod (322).

6. A positioning device for welding large-diameter towers according to claim 1, characterized in that, The walking mechanism (40) includes a mounting housing (41) with an open bottom. Several walking wheels (42) are installed at intervals inside the mounting housing (41). A second drive motor (43) is connected to one side of the mounting housing (41), and the output shaft of the second drive motor (43) is connected to one of the walking wheels (42).

7. A positioning device for welding large-diameter towers according to claim 1, characterized in that, The auxiliary frame mechanism (20) includes a top-opening base (21), with roller seats (22) symmetrically slidably connected to the top of the base (21). Two inclined guide rollers (23) are rotatably mounted on the roller seats (22). A driving device (24) is connected inside the base (21) to drive the roller seats (22) to move in opposite directions. The driving device (24) includes a bidirectional lead screw (241), with moving blocks (2) mounted on the positive and negative teeth of the bidirectional lead screw (241). 42), the moving block (242) is connected to the corresponding roller seat (22) respectively, the base (21) is equipped with a drive motor three (243) on one side, the output shaft of the drive motor three (243) is connected to one end of the bidirectional lead screw (241), the top two sides of the base (21) are respectively equipped with guide rail two (25), the guide rail two (25) is symmetrically slidably connected with slider two (26), and the slider two (26) is connected to the corresponding roller seat (22) respectively.

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