A quick positioning and clamping device for welding a tower foot of a power transmission tower

Abstract

The application discloses a kind of transmission tower foot welding quick positioning clamping devices, it is related to welding positioning device field, it solves the poor structure adaptability of existing transmission tower foot welding positioning clamping device when using, the problem that positioning clamping operation is not enough convenient and efficient, including machine body, welding arm and clamping mechanism, clamping mechanism includes rotating table, rotating disc, support plate, clamping piece and positioning piece, the position of clamping piece is adjusted to the tower foot bottom plate of different specifications shape by clamping mechanism and is fixed, simultaneously drive positioning piece to move, automatically position to tower foot side plate, and after welding is completed, synchronous control is removed from position, the efficiency of positioning clamping is improved, simultaneously support plate can be efficiently disassembled and replaced, avoid the uneven support surface due to long time abrasion and lead to the situation that welding state appears, the device is convenient to operate, can effectively improve the welding and clamping efficiency of transmission tower foot.

Description

Technical Field

[0001] This invention relates to the field of welding positioning device technology, specifically a rapid positioning and clamping device for welding the base of power transmission towers. Background Technology

[0002] As the core load-bearing component of the transmission line support structure, the tower feet are typically assembled by welding a base plate and a support plate. The welding precision directly determines the stability and service life of the overall transmission tower structure. In the mass production of tower feet, clamping and positioning are key processes to ensure welding quality and improve production efficiency. They must simultaneously meet the requirements of precise positioning and reliable fixing of the base plate and support plate, as well as adapting to the processing needs of tower feet of different specifications.

[0003] The existing tower foot welding and clamping technology has many shortcomings: First, the positioning and clamping operation is cumbersome. Most clamps need to fix the base plate and support plate separately through multiple independent control mechanisms. Not only are the operation steps redundant, but it is also difficult to achieve synchronous positioning of the two, resulting in long clamping time and affecting production efficiency. The existing devices have poor versatility. The clamping blocks of traditional clamping devices are mostly fixed structures that can only be adapted to a single shape (square or round) of tower foot base plate. However, in actual production, tower foot base plates have various specifications, requiring frequent replacement of special clamps, which increases equipment investment costs and clamp storage space. At the same time, the switching process further reduces production continuity. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid positioning and clamping device for welding the base plate and side plate of transmission towers, which facilitates improved welding positioning efficiency and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rapid positioning and clamping device for welding tower legs of power transmission towers, comprising a body and a clamping mechanism. A welding arm is fixedly connected to the body. The clamping mechanism includes a rotating platform fixedly installed on the body. A rotating disk is rotatably connected to the upper side of the rotating platform. A replaceable support plate is provided on the upper side of the rotating disk. A clamping component capable of clamping and fixing tower leg base plates of different specifications and shapes is provided on the rotating disk. A positioning component capable of clamping and positioning tower leg side plates is provided on the rotating disk. The clamping mechanism can fix the tower leg base plate by adjusting the position of the clamping component, and simultaneously drive the positioning component to move, automatically positioning the tower leg side plate. After welding is completed, the limit is released simultaneously, improving the efficiency of positioning and clamping, and facilitating the improvement of welding positioning efficiency for tower leg base plates and side plates.

[0006] Preferably, the clamping component includes four driving blocks mounted on the rotating disk. The rotating disk has four evenly spaced sliding grooves, one end of each groove pointing towards the axis of the rotating disk. A first threaded rod is rotatably connected inside the rotating disk, passing through two opposite sliding grooves. A fixing rod is fixedly connected to each of the other two sliding grooves. The driving blocks are slidably connected to the inner walls of the sliding grooves. The fixing rods pass through the driving blocks and are slidably connected to the inner walls of the driving blocks. The first threaded rods pass through the driving blocks and are threadedly connected to the inner walls of the driving blocks. The first threaded rods located in the sliding grooves on both sides have opposite thread directions. The driving blocks are equipped with fixing components for clamping the tower base plates, facilitating the clamping and fixing of tower base plates of different specifications and shapes.

[0007] Preferably, the fixing component includes multiple sets of plug-in rods fixedly installed on the upper side of the drive block. The support plate has four connecting slots, the positions of which correspond to the positions of the sliding slots. The plug-in rods can pass through the connecting slots and slide against the inner wall of the connecting slots. The upper side of the support plate is provided with a clamping block. The clamping block has plug-in holes that can be inserted into the outer wall of the plug-in rods in the vertical direction. The clamping block is provided with a limiting component for limiting and fixing the clamping block and the plug-in rods, which facilitates clamping the tower foot plate.

[0008] Preferably, the positioning component includes four positioning rods installed on the upper side of the rotating disk. A fixing plate is fixedly connected to the middle of the upper side of each positioning rod. Clamping plates are respectively provided on both sides of the fixing plate. The clamping plates are slidably connected to the top surface of the positioning rod in the horizontal direction. Rotating frames are rotatably connected to both ends of the positioning rod. A telescopic sleeve is slidably connected inside the rotating frame. A tension spring is fixedly connected to one end of the telescopic sleeve and fixedly connected to the rotating frame. The rotating disk is provided with an adjustment component for presetting the position of the clamping plates, which facilitates clamping and positioning of the tower foot side plate.

[0009] Preferably, a snap-fit ​​post is fixedly connected to the end of the telescopic sleeve away from the tension spring, and four sets of snap-fit ​​grooves are evenly provided on the clamping block to snap and fix it with the snap-fit ​​post. A second threaded rod is rotatably connected to the fixing plate. The second threaded rod passes through the clamping plates on both sides and is threadedly connected to the clamping plates, which facilitates the adjustment of the clamping state of the clamping plates.

[0010] Preferably, the adjusting component includes four sets of guide frames evenly and fixedly installed on the upper side of the rotating disk. An adjusting seat is slidably connected inside the guide frame, and an adjusting frame is rotatably connected to the adjusting seat. A guide rod is fixedly connected to the side of the positioning rod. The guide rod passes through the adjusting frame and is slidably connected to the inner wall of the adjusting frame. A third threaded rod is rotatably connected inside the guide frame. The third threaded rod passes through the adjusting seat and is threadedly connected to the adjusting seat, which facilitates the preset position of the clamping plate.

[0011] Preferably, the limiting member includes two sets of rack rods installed in the clamping block. The clamping block has a device groove, and a limiting block is slidably connected in the device groove. The two sides of the plug rod have triangular grooves that can engage with the limiting block. A gear is rotatably connected in the device groove. The limiting block has a toothed groove that meshes with the gear. One end of the limiting block is fixedly connected to an elastic element that is fixedly connected to the device groove. The rack rod is slidably connected to the inner wall of the device groove and meshes with the gear, which facilitates limiting and fixing the clamping block and the plug rod.

[0012] Preferably, the clamping block has two sets of protrusions on one side, and a right-angle groove on the side of the clamping block away from the protrusions, so as to adjust the clamping of the square base plate or the round base plate by switching the position of the clamping block.

[0013] Preferably, a drive motor is fixedly connected to the rotating platform, and the output end of the drive motor is coaxially fixedly connected to the bottom end of the rotating disk. Multiple sets of bolts are rotatably connected to the support plate, and the bolts can be threadedly connected to the rotating disk to facilitate the fixing and rotation adjustment of the support plate.

[0014] Preferably, one end of the first threaded rod is coaxially fixedly connected to a drive disk, which facilitates manual control of the opening and closing state of the clamping block.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention provides a rapid positioning and clamping device for welding tower legs of power transmission towers. It solves the problems of poor structural adaptability and inconvenient / inefficient operation of existing positioning and clamping devices for power transmission tower legs. The device uses a clamping mechanism to adjust the position of the clamping components to fix tower leg base plates of different specifications and shapes. Simultaneously, it moves the positioning components to automatically position the tower leg side plates. After welding, the device synchronously releases the limit switch, improving the efficiency of positioning and clamping. Furthermore, the support plate can be efficiently disassembled and replaced, preventing unevenness of the support surface due to long-term wear from affecting the welding process. This device is easy to operate and effectively improves the welding and clamping efficiency of power transmission tower legs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a partial structural diagram of the clamping mechanism of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the rotating disk of the present invention;

[0021] Figure 5 This is a partial structural cross-sectional view of the clamping mechanism of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of region B in the middle;

[0023] Figure 7 This is a partial structural exploded view of the clamping mechanism of the present invention;

[0024] Figure 8 for Figure 7 Enlarged view of region C;

[0025] Figure 9 for Figure 7 Enlarged view of region D in the middle.

[0026] In the diagram: 1-Main body; 2-Welding arm; 3-Rotating table; 4-Rotating disk; 5-Support plate; 6-Drive block; 7-Sliding groove; 8-First threaded rod; 9-Fixing rod; 10-Plug-in rod; 11-Connecting groove; 12-Clamping block; 13-Plug-in hole; 14-Positioning rod; 15-Fixing plate; 16-Clamping plate; 17-Rotating frame; 18-Telescopic sleeve; 19-Tension spring; 20-Snap-in post; 21-Snap-in groove; 22-Second threaded rod; 23-Guide frame; 24-Adjusting seat; 25-Adjusting frame; 26-Guide rod; 27-Third threaded rod; 28-Rack rod; 29-Device groove; 30-Limiting block; 31-Triangular groove; 32-Gear; 33-Gear groove; 34-Protrusion; 35-Right angle groove; 36-Drive motor; 37-Bolt; 38-Drive disc; 39-Tower foot base plate; 40-Tower foot side plate; 41-Elastic element. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-4 This invention provides a technical solution: a rapid positioning and clamping device for welding the legs of power transmission towers, comprising a body 1 and a clamping mechanism. A welding arm 2 is fixedly connected to the body 1. The clamping mechanism includes a rotating platform 3 fixedly mounted on the body 1. A rotating disk 4 is rotatably connected to the upper side of the rotating platform 3. A replaceable support plate 5 is provided on the upper side of the rotating disk 4. A drive motor 36 is fixedly connected to the rotating platform 3. The drive motor 36 is preferably a 42BYGH34 stepper motor. The output end of the drive motor 36 is coaxially fixed with the bottom end of the rotating disk 4. The support plate 5 is rotatably connected to multiple sets of bolts 37, which can be threadedly connected to the rotating disk 4. The rotating disk 4 is equipped with clamping components that can clamp and fix tower foot base plates 39 of different specifications and shapes, and positioning components that can clamp and position tower foot side plates 40. The clamping mechanism can fix the tower foot base plate 39 by adjusting the position of the clamping components, and at the same time drive the positioning components to move, automatically positioning the tower foot side plates 40. After welding is completed, the limit is released simultaneously, improving the efficiency of positioning and clamping.

[0029] Please see Figures 2-6 The clamping components shown in the figure include four drive blocks 6 mounted on a rotating disk 4. The rotating disk 4 has four evenly spaced sliding grooves 7, one end of each of the four sliding grooves 7 pointing towards the axis of the rotating disk 4. A first threaded rod 8 is rotatably connected inside the rotating disk 4. One end of the first threaded rod 8 is coaxially fixedly connected to a drive disk 38. The first threaded rod 8 passes through two opposite sliding grooves 7. Fixing rods 9 are fixedly connected to the other two sliding grooves 7. The drive blocks 6 are slidably connected to the inner walls of the sliding grooves 7. The fixing rods 9 pass through the drive blocks 6 and are slidably connected to the inner walls of the drive blocks 6. The first threaded rods 8 pass through the drive blocks 6 and are threadedly connected to the inner walls of the drive blocks 6. The first threaded rods 8 located in the two sliding grooves 7 have opposite thread directions. The drive blocks 6 are provided with fixing components for clamping the tower foot plate 39.

[0030] Please see Figures 2-9The fasteners shown in the figure include multiple sets of plug-in rods 10 fixedly installed on the upper side of the drive block 6. The support plate 5 has four connecting slots 11, the positions of which correspond to the positions of the sliding slots 7. The plug-in rods 10 can pass through the connecting slots 11 and slide against the inner wall of the connecting slots 11. A clamping block 12 is provided on the upper side of the support plate 5. The clamping block 12 has plug-in holes 13 that can be inserted vertically into the outer wall of the plug-in rods 10. Two sets of protrusions 34 are provided on one side of the clamping block 12, and a right-angled groove 35 is provided on the side of the clamping block 12 away from the protrusions 34. The clamping block 12 has a limiting and fixing function for positioning the clamping block 12 and the plug-in rods 10. The limiting component includes two sets of rack rods 28 installed in the clamping block 12. The clamping block 12 has a device groove 29. A limiting block 30 is slidably connected in the device groove 29. Triangular grooves 31 that can engage with the limiting block 30 are opened on both sides of the plug rod 10. A gear 32 is rotatably connected in the device groove 29. A toothed groove 33 that meshes with the gear 32 is opened on the limiting block 30. An elastic element 41 that is fixedly connected to the device groove 29 is fixedly connected at one end of the limiting block 30. The elastic element 41 can be an existing structure that can rebound and reset, such as a spring. The rack rods 28 are slidably connected to the inner wall of the device groove 29 and mesh with the gear 32.

[0031] Please see Figures 2-9 The positioning components shown in the figure include four positioning rods 14 mounted on the upper side of the rotating disk 4. A fixing plate 15 is fixedly connected to the middle of the upper side of the positioning rod 14. Clamping plates 16 are respectively provided on both sides of the fixing plate 15. The clamping plates 16 are slidably connected to the top surface of the positioning rod 14 in the horizontal direction. Rotating frames 17 are rotatably connected to both ends of the positioning rod 14. Telescopic sleeves 18 are slidably connected inside the rotating frames 17. One end of the telescopic sleeve 18 is fixedly connected to a tension spring 19 fixedly connected to the rotating frame 17. The rotating disk 4 is provided with an adjustment component for presetting the position of the clamping plates 16. A snap-fit ​​post 20 is fixedly connected to the end of the telescopic sleeve 18 away from the tension spring 19. The clamping block 12 is evenly distributed with There are four sets of snap-fit ​​grooves 21 that can snap and fix with snap-fit ​​posts 20. A second threaded rod 22 is rotatably connected to the fixing plate 15. The second threaded rod 22 passes through the clamping plates 16 on both sides and is threadedly connected to the clamping plates 16. The adjusting component includes four sets of guide frames 23 that are evenly fixedly installed on the upper side of the rotating disk 4. An adjusting seat 24 is slidably connected inside the guide frame 23. An adjusting frame 25 is rotatably connected to the adjusting seat 24. A guide rod 26 is fixedly connected to the side of the positioning rod 14. The guide rod 26 passes through the adjusting frame 25 and is slidably connected to the inner wall of the adjusting frame 25. A third threaded rod 27 is rotatably connected inside the guide frame 23. The third threaded rod 27 passes through the adjusting seat 24 and is threadedly connected to the adjusting seat 24.

[0032] Working principle: Rotating the drive disc 38 drives the first threaded rod 8 to rotate, thereby enabling the two sets of drive blocks 6 to move synchronously along the sliding groove 7. Through the connection of the telescopic sleeve 18, rotating frame 17, and positioning rod 14, the other two sets of drive blocks 6 can slide synchronously on the fixed rod 9, achieving the synchronous opening and closing of the four sets of drive blocks 6. Since the shape of the tower foot base plate 39 is generally circular or square, the orientation of the surrounding clamping blocks 12 can be adjusted. A circular base plate can be synchronously clamped via one side of the protrusion 34, while a square base plate can be synchronously clamped via one side of the right-angle groove 35. After clamping and fixing, the center position of the tower foot base plate 39 is relatively fixed. The distance between the surrounding side plates and the center position of the tower foot base plate 39 is determined by the relative position of the four side plates. The distance can be preset in the position of the fixed plate 15. The position of the adjusting seat 24 can be adjusted by rotating the third threaded rod 27, thereby driving the adjusting frame 25 and the guide rod 26 to slide horizontally. The guide rod 26 drives the positioning rod 14 and the fixed plate 15 to slide to the initial position of the middle of the adjusting side plate. The clamping state can be adjusted according to the thickness of the side plate by rotating the second threaded rod 22. Since most tower foot base plates 39 are square, the structure of the clamping plate 16 and the fixed plate 15 are designed with the square tower foot base plate 39 as an example. After the tower foot base plate 39 and the side plate are fixed, the welding arm 2 can be controlled to weld the corresponding connection position. By controlling the drive motor 36 to drive the rotating disk 4 to rotate, the angle of the tower foot base plate 39 can be changed, so that the welding arm 2 can weld the four sides of the tower foot.

[0033] After welding is completed, rotating the drive disc 38 in the reverse direction will cause the four sets of drive blocks 6 and clamping blocks 12 to slide synchronously in the opposite direction, releasing the clamping state on the tower foot base plate 39. At the same time, the clamping blocks 12 will also cause the snap-fit ​​column 20, telescopic sleeve 18, rotating frame 17 and positioning rod 14 to slide in the same direction, releasing the clamping state of the clamping plate 16 on the side plate. The clamping plate 16 is only used to straighten the tower foot side plate 40 and prevent it from tilting during welding. The inner wall of the clamping plate 16 can be equipped with multiple sets of vertical rollers to ensure the clamping state of the tower foot side plate 40 while reducing the friction between the clamping plate 16 and the tower foot side plate 40 when sliding horizontally, thus improving the efficiency of positioning and unpositioning. Afterwards, the welded tower foot can be lifted away from the support plate 5 by a crane or other equipment. Since the middle part of the support plate 5 is subjected to wear and tear from the tower foot base plate 39 for a long time, it is prone to unevenness. To reduce the overall replacement cost, the support plate 5 is designed to be detachable. When the support plate 5 needs to be disassembled and replaced, the four locking posts 20 can be slid out from the locking grooves 21. Under the reset action of the tension spring 19 and the telescopic sleeve 18, the telescopic sleeve 18 slides into the rotating frame 17 for reset. Then, the positioning rod 14 can be slid to the position of fitting the adjustment frame 25. Rotate the adjustment frame 25 so that the guide rod 26 is in a vertical state. At this time, the clamping plate 16 rotates to the upper position to avoid obstructing the movement of the support plate 5. Then press the rack rods 28 on both sides of the clamping block 12 so that the rack rods 28 drive the gear 32 to rotate, thereby driving the tooth groove 33 to make the limiting block 30 slide and compress the elastic element 41. The limiting block 30 is released from the locking with the triangular groove 31, and the clamping block 12 can be pulled out from the plug rod 10. Then, release the fixing between the bolt 37 and the rotating disk 4, and the support plate 5 can be vertically removed for replacement.

[0034] Similarly, align the connecting groove 11 of the support plate 5 with the surrounding plug rods 10, install the support plate 5, and tighten the bolts 37 for fixation. Then, insert the clamping block 12 into the plug rod 10 at a suitable angle. Under the push of the elastic element 41, the limiting block 30 automatically engages with the triangular groove 31 for limitation. Then, rotate the adjusting frame 25 in the opposite direction to make the guide rod 26 horizontal. Pull the locking post 20 and rotate the rotating frame 17 so that the locking post 20 engages with the adjacent locking groove 21 for limitation. The overall connection reset can then be completed, and the welding and positioning operation of the tower foot can continue.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid positioning and clamping device for welding the legs of power transmission towers, characterized in that, include: The body (1) is fixedly connected to the welding arm (2); Also includes: The clamping mechanism includes a rotating platform (3) fixedly installed on the machine body (1). A rotating disk (4) is rotatably connected to the upper side of the rotating platform (3). A replaceable support plate (5) is provided on the upper side of the rotating disk (4). A clamping member is provided on the rotating disk (4) to clamp and fix tower foot base plates of different specifications and shapes. A positioning member is provided on the rotating disk (4) to clamp and position the tower foot side plate. The clamping mechanism can fix the tower foot base plate by adjusting the position of the clamping member, and at the same time drive the positioning member to move, automatically positioning the tower foot side plate. After welding, the limit is released simultaneously to improve the efficiency of positioning and clamping. The clamping member includes four clamping members installed on the machine body (1). A drive block (6) is mounted on a rotating disk (4). Four sliding grooves (7) are evenly provided on the rotating disk (4). One end of each of the four sliding grooves (7) points to the axis of the rotating disk (4). A first threaded rod (8) is rotatably connected inside the rotating disk (4). The first threaded rod (8) passes through two opposite sliding grooves (7). A fixing rod (9) is fixedly connected to each of the other two sliding grooves (7). The drive block (6) is slidably connected to the inner wall of the sliding groove (7). The fixing rod (9) passes through the drive block (6) and is slidably connected to the inner wall of the drive block (6). The first threaded rod (8) passes through the drive block (6) and is threadedly connected to the inner wall of the drive block (6). The drive block (6) is located on both sides. The first threaded rod (8) in the sliding groove (7) has opposite thread directions. The driving block (6) is provided with a fixing member for clamping the base plate of the tower foot. The fixing member includes multiple sets of plug-in rods (10) fixedly installed on the upper side of the driving block (6). The support plate (5) is provided with four connecting grooves (11). The position of the connecting grooves (11) corresponds to the position of the sliding groove (7). The plug-in rod (10) can pass through the connecting groove (11) and slide with the inner wall of the connecting groove (11). The upper side of the support plate (5) is provided with a clamping block (12). The clamping block (12) is provided with a plug-in hole (13) that can be inserted into the outer wall of the plug-in rod (10) in the vertical direction. The holding block (12) is provided with a limiting member for limiting and fixing the clamping block (12) and the plug-in rod (10). The positioning member includes four positioning rods (14) installed on the upper side of the rotating disk (4). A fixing plate (15) is fixedly connected to the middle of the upper side of the positioning rod (14). Clamping plates (16) are provided on both sides of the fixing plate (15). The clamping plate (16) and the top surface of the positioning rod (14) are slidably connected in the horizontal direction. Rotating frames (17) are rotatably connected to both ends of the positioning rod (14). A telescopic sleeve (18) is slidably connected inside the rotating frame (17). A tension spring (19) is fixedly connected to one end of the telescopic sleeve (18) and fixedly connected to the rotating frame (17).The rotating disk (4) is provided with an adjustment component for presetting the position of the clamping plate (16). A snap-fit ​​post (20) is fixedly connected to the end of the telescopic sleeve (18) away from the tension spring (19). Four sets of snap-fit ​​grooves (21) are evenly distributed on the clamping block (12) to snap and fix it to the snap-fit ​​post (20). A second threaded rod (22) is rotatably connected to the fixing plate (15). The second threaded rod (22) passes through both sides of the clamping plates (16) and is threadedly connected to the clamping plates (16).

2. The rapid positioning and clamping device for welding the legs of a power transmission tower as described in claim 1, characterized in that: The adjusting component includes four sets of guide frames (23) uniformly fixedly installed on the upper side of the rotating disk (4). An adjusting seat (24) is slidably connected inside the guide frame (23). An adjusting frame (25) is rotatably connected to the adjusting seat (24). A guide rod (26) is fixedly connected to the side of the positioning rod (14). The guide rod (26) passes through the adjusting frame (25) and is slidably connected to the inner wall of the adjusting frame (25). A third threaded rod (27) is rotatably connected inside the guide frame (23). The third threaded rod (27) passes through the adjusting seat (24) and is threadedly connected to the adjusting seat (24).

3. The rapid positioning and clamping device for welding the tower legs of a power transmission tower according to claim 1, characterized in that: The limiting component includes two sets of rack rods (28) installed in the clamping block (12). The clamping block (12) has a device groove (29) in it. A limiting block (30) is slidably connected in the device groove (29). The plug rod (10) has triangular grooves (31) on both sides that can engage with the limiting block (30). A gear (32) is rotatably connected in the device groove (29). A tooth groove (33) that meshes with the gear (32) is opened on the limiting block (30). One end of the limiting block (30) is fixedly connected to an elastic element (41) that is fixedly connected to the device groove (29). The rack rod (28) is slidably connected to the inner wall of the device groove (29) and meshes with the gear (32).

4. The rapid positioning and clamping device for welding the tower legs of a power transmission tower according to claim 1, characterized in that: The clamping block (12) has two sets of protrusions (34) on one side, and a right-angle groove (35) is provided on the side of the clamping block (12) away from the protrusions (34).

5. The rapid positioning and clamping device for welding the tower legs of a power transmission tower according to claim 1, characterized in that: A drive motor (36) is fixedly connected to the rotating platform (3). The output end of the drive motor (36) is coaxially fixedly connected to the bottom end of the rotating disk (4). Multiple sets of bolts (37) are rotatably connected to the support plate (5). The bolts (37) can be threadedly connected to the rotating disk (4).

6. The rapid positioning and clamping device for welding the tower legs of a power transmission tower according to claim 1, characterized in that: One end of the first threaded rod (8) is coaxially fixedly connected to a drive disk (38).

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