Automatic welding device and method for foundation bolt assembly of electric iron tower

Abstract

The invention discloses an automatic welding device and method for an electric iron tower foundation bolt assembly, and relates to the technical field of welding, the automatic welding device comprises a hollow base, a protective cover is fixedly mounted at the top of the hollow base, a rotating door is rotatably mounted on the inner wall of the protective cover, and a driving device is fixedly mounted at the top of the inner wall of the protective cover; an electric telescopic rod is fixedly installed at the output end of the driving device, and welding equipment is fixedly installed at the output end of the electric telescopic rod. The clamping device is arranged at the top of the hollow base, the clamping device comprises a motor, a bevel gear, a screw rod, a driven gear, a threaded block, a clamping plate, a sliding rod, a fixed plate, a sliding plate, a short rod, a limiting plate and a placing plate, four corners of a workpiece are clamped through the clamping plate, and the situation that the workpiece moves in the welding process, so that the welding position deviates is prevented; and through pressing of the limiting plate, the welding stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to an automatic welding device and method for an electric power tower anchor bolt assembly. Background Art

[0002] Anchor bolts are usually prefabricated in tower factories, welded together with square base plates and reinforcing rib plates, the threaded parts are hot-dip galvanized, and then the assembly is transported to the site and buried in the concrete foundation.

[0003] The patent with patent announcement number CN112496648B relates to an automatic welding device for the anchor bolt assembly of an electric power tower. The bolt is placed horizontally on the supporting wheel of the bracket, one end of the bolt is pressed against the base plate, and the other side of the base plate is sucked by the base plate magnet in the center of the turntable. The turntable is connected to the motor shaft, and the motor shaft passes through the motor seat and the spindle seat and is connected to the motor through a reduction box; the welding line between the base plate and the bolt is located within the active range of the welding head of the welding robot. This patent has changed the current situation of manual welding of the anchor bolt assembly dedicated to the electric power tower. In conjunction with the automatic welding robot, it realizes the rapid and automatic welding of the anchor bolt assembly, greatly improving the welding efficiency, and has the advantages of rapid workpiece positioning and precise welding.

[0004] In the above patent, the current situation of manual welding of anchor bolt assemblies dedicated to power towers is changed, and rapid automatic welding of anchor bolt assemblies is achieved by cooperating with automatic welding robots. The welding efficiency is greatly improved, and it has the advantages of rapid workpiece positioning and precise welding. However, instability may occur in the process of fixing the anchor bolt assemblies, resulting in shaking or displacement during welding, affecting the welding effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic welding device and method for an electric tower anchor bolt assembly, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic welding device for an electric tower anchor bolt assembly, comprising a hollow base, a protective cover is fixedly installed on the top of the hollow base, a revolving door is rotatably installed on the inner wall of the protective cover, a driving device is fixedly installed on the top of the inner wall of the protective cover, an electric telescopic rod is fixedly installed on the output end of the driving device, and a welding device is fixedly installed on the output end of the electric telescopic rod; a clamping device, the clamping device is arranged on the top of the hollow base, and the clamping device includes a motor, a bevel gear, a spiral rod, a slave gear, a threaded block, a clamping plate, a sliding rod, a fixed plate, a sliding plate, a short rod, a limit plate and a placement plate, the rotation of the bevel gear will drive the slave gear to rotate, the rotation of the slave gear will drive the spiral rod to rotate, the rotation of the spiral rod will drive the threaded block to rotate, and the rotation of the threaded block will drive the clamping plate to move in a direction close to the workpiece, and the motor is fixedly installed in the hollow base. The bevel gear is fixedly mounted on the output end of the motor, and a groove is provided on the top of the hollow base. The screw rod is rotatably mounted on the inner wall of the groove, and the slave gear is fixedly mounted on the side of the screw rod away from the groove. The bevel gear is meshed with the surface of the slave gear, and the threaded block is threadedly mounted on the circumferential surface of the screw rod. The clamping plate is fixedly mounted on the top of the threaded block, and the sliding rod slides through the surface of the clamping plate, and the fixed plate is fixedly mounted on the surface of the clamping plate. The sliding plate is slidably mounted on the surface of the fixed plate, and the short rod is fixedly mounted on the surface of the sliding plate. The limit plate is fixedly mounted on the bottom of the short rod, and the placement plate is fixedly mounted on the top of the hollow base. The sliding rod moves in the direction close to the protective cover to squeeze the sliding plate to move downward, and the downward movement of the sliding plate drives the short rod to move downward, and the downward movement of the short rod drives the limit plate to move downward, and the workpiece is squeezed by the downward movement of the limit plate.

[0007] According to the above technical solution, a No. 1 spring is arranged between the sliding rod and the clamping plate, and the No. 1 spring drives the sliding rod to reset. A No. 2 spring is arranged between the sliding plate and the fixed plate, and the No. 2 spring drives the sliding plate to reset.

[0008] According to the above technical solution, a correction device for correcting the workpiece is arranged inside the placing plate, and a protective device is arranged on the correction device. The correction device includes an L-shaped rod, an elastic telescopic rod, a correction plate and a guide plate. The L-shaped rod is driven to move in a direction close to the workpiece by the movement of the threaded block in a direction close to the workpiece. The movement of the L-shaped rod in a direction close to the workpiece will push the guide plate to move in the direction of the workpiece. The L-shaped rod is fixedly installed on the top of the threaded block, a sliding groove is provided on the surface of the placing plate, the elastic telescopic rod is fixedly installed on the inner wall of the sliding groove, the correction plate is fixedly installed on the fixed end of the elastic telescopic rod, and the guide plate is fixedly installed on the side of the correction plate away from the elastic telescopic rod.

[0009] According to the above technical solution, a push rod is fixedly installed at the fixed end of the elastic telescopic rod, a trapezoidal block is slidably installed on the inner wall of the slide groove, and a support plate is fixedly installed on the top of the trapezoidal block. The upward movement of the trapezoidal block will drive the support plate to move upward, and the bottom of the workpiece is supported by the upward movement of the support plate.

[0010] According to the above technical solution, the push rod contacts the surface of the trapezoidal block, and a No. 3 spring is arranged between the slide groove and the trapezoidal block, and the trapezoidal block is reset by the No. 3 spring.

[0011] According to the above technical solution, the protective device includes a connecting rod, an L-shaped plate, a limit frame and an elastic telescopic block. The connecting rod is driven upward by the upward movement of the trapezoidal block. The upward movement of the connecting rod will drive the L-shaped plate upward. The upward movement of the L-shaped plate will be stuck in the limit frame, and the L-shaped plate is limited by the limit frame. The connecting rod is fixedly installed on the surface of the trapezoidal block, the L-shaped plate is fixedly installed on the end of the connecting rod away from the trapezoidal block, the elastic telescopic block is fixedly installed on the side of the revolving door close to the welding equipment, and the limit frame is fixedly installed on the free end of the elastic telescopic block.

[0012] According to the above technical solution, a pull rod is fixedly installed on the free end of the elastic telescopic block, a protective shell is slidably installed on the side of the revolving door away from the pull rod, a short plate is fixedly installed on the surface of the protective shell, and an elastic telescopic plate is fixedly installed on the side of the revolving door away from the pull rod. The short plate moves upward and is released to the free end of the elastic telescopic plate. The elastic telescopic plate will limit the short plate to prevent the No. 4 spring from driving the protective shell to reset when letting go.

[0013] According to the above technical solution, the L-shaped plate is arranged below the limit frame, and a No. 4 spring is arranged between the revolving door and the protective shell, and the No. 4 spring drives the protective shell to reset.

[0014] The present invention provides an automatic welding device and method for an electric power tower anchor bolt assembly, which has the following beneficial effects: (1) The invention places the workpiece on a placement plate and welds the workpiece through the cooperation of a driving device, an electric telescopic rod and a welding device. The four corners of the workpiece are clamped by a clamping plate to prevent the workpiece from moving during welding, which would cause the welding position to shift and affect the welding accuracy. At the same time, the downward movement of the short rod will drive the limit plate to move downward. The downward movement of the limit plate squeezes the workpiece to prevent shaking during welding, which would cause unstable welding. The limit plate is used to press and improve the stability of welding.

[0015] (2) In this invention, the guide plate moves toward the workpiece, which drives the correction plate to move toward the workpiece. The position of the workpiece is corrected by moving the correction plate toward the workpiece to prevent the workpiece from shifting during placement, which would result in the workpiece not being clamped accurately and causing problems in subsequent welding. The support plate moves upward to support the bottom of the workpiece. By raising the workpiece, the operator and equipment can better control the welding angle and position, reduce the occurrence of welding defects, and improve the strength and consistency of the weld.

[0016] (3) In this invention, the L-shaped plate moves upward and gets stuck in the limit frame. The limit frame limits the L-shaped plate so that the revolving door cannot be opened. This prevents the user from opening the revolving door due to mistaken operation during welding. Sparks generated by welding may splash into people's eyes, posing a safety hazard. At the same time, the limit frame moves upward and releases the limit of the L-shaped plate on the limit frame, so that the revolving door can be opened normally, thereby improving the applicability of the equipment. The provision of a protective shell prevents the operator from opening the revolving door due to mistaken operation, thereby affecting the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the structure of the clamping device of the present invention; Figure 4 This is a schematic diagram of the top structure of the hollow base of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement of part A; Figure 6 This is a schematic diagram of the cross-sectional structure of the placement plate of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the revolving door of the present invention.

[0018] In the figure: 1. hollow base; 2. protective cover; 3. revolving door; 4. driving device; 5. electric telescopic rod; 6. welding equipment; 7. motor; 8. bevel gear; 9. screw rod; 10. follower gear; 11. threaded block; 12. clamping plate; 13. sliding rod; 14. fixing plate; 15. sliding plate; 16. short rod; 17. limiting plate; 18. placing plate; 191. L-shaped rod; 192. elastic telescopic rod; 193. correction plate; 194. guide plate; 195. push rod; 196. trapezoidal block; 197. support plate; 201. connecting rod; 202. L-shaped plate; 203. limiting frame; 204. elastic telescopic block; 205. pull rod; 206. protective shell; 207. short plate; 208. elastic telescopic plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 5 An embodiment of the present invention is: an automatic welding device for an electric power tower anchor bolt assembly, comprising a hollow base 1, a protective cover 2 is fixedly installed on the top of the hollow base 1, a revolving door 3 is rotatably installed on the inner wall of the protective cover 2, a driving device 4 is fixedly installed on the top of the inner wall of the protective cover 2, an electric telescopic rod 5 is fixedly installed on the output end of the driving device 4, and a welding device 6 is fixedly installed on the output end of the electric telescopic rod 5; a clamping device, the clamping device is arranged on the top of the hollow base 1, the clamping device comprises a motor 7, a bevel gear 8, a screw rod 9, a slave gear 10, a threaded block 11, a clamping plate 12, a sliding rod 13, a fixed plate 14, a sliding plate 15, a short rod 16, a limit plate 17 and a placement plate 18, the four corners of the workpiece are clamped by the clamping plate 12 to prevent the workpiece from moving during welding, causing the welding position to shift and affecting the welding accuracy, The machine 7 is fixedly installed at the bottom of the hollow base 1, the bevel gear 8 is fixedly installed at the output end of the motor 7, a groove is opened at the top of the hollow base 1, the screw rod 9 is rotatably installed on the inner wall of the groove, the slave gear 10 is fixedly installed on the side of the screw rod 9 away from the groove, the bevel gear 8 is meshed with the surface of the slave gear 10, the threaded block 11 is threadedly installed on the circumferential surface of the screw rod 9, the clamping plate 12 is fixedly installed on the top of the threaded block 11, the sliding rod 13 slides through the surface of the clamping plate 12, the fixed plate 14 is fixedly installed on the surface of the clamping plate 12, the sliding plate 15 is slidably installed on the surface of the fixed plate 14, the short rod 16 is fixedly installed on the surface of the sliding plate 15, the limit plate 17 is fixedly installed at the bottom of the short rod 16, and the placement plate 18 is fixedly installed on the top of the hollow base 1 to prevent shaking during welding, which causes unstable welding. The limit plate 17 is pressed to improve the stability of welding.

[0021] A No. 1 spring is arranged between the sliding rod 13 and the clamping plate 12, and the sliding rod 13 is reset by the No. 1 spring. A No. 2 spring is arranged between the sliding plate 15 and the fixed plate 14, and the sliding plate 15 is reset by the No. 2 spring.

[0022] A method for using an automatic welding device for an electric power tower anchor bolt assembly comprises the following steps: Step 1: Place the workpiece on the placement plate 18, and weld the workpiece by the cooperation of the driving device 4, the electric telescopic rod 5 and the welding device 6; Step 2: The motor 7 rotates to drive the bevel gear 8 to rotate, the bevel gear 8 rotates to drive the slave gear 10 to rotate, the slave gear 10 rotates to drive the screw rod 9 to rotate, the screw rod 9 rotates to drive the thread block 11 to rotate, the thread block 11 rotates to drive the clamping plate 12 to move toward the workpiece, and the four corners of the workpiece are clamped by the clamping plate 12 to prevent the workpiece from moving during welding, resulting in deviation of the welding position and affecting the welding accuracy; Step 3: The clamping plate 12 moves toward the workpiece to drive the sliding rod 13 to move toward the workpiece. The sliding rod 13 moves toward the workpiece and contacts the workpiece. The workpiece squeezes the sliding rod 13 to move toward the protective cover 2. Step 4: The sliding rod 13 is moved toward the direction close to the protective cover 2 to squeeze the sliding plate 15 downward. The downward movement of the sliding plate 15 drives the short rod 16 to move downward. The downward movement of the short rod 16 drives the limit plate 17 to move downward. The limit plate 17 moves downward to squeeze the workpiece to prevent shaking during welding, which leads to unstable welding. The limit plate 17 is pressed to improve the stability of welding. When the present embodiment is working, the workpiece is placed on the placement plate 18, and the workpiece is welded by the driving device 4, the electric telescopic rod 5 and the welding device 6. At the same time, the motor 7 is started. The rotation of the motor 7 drives the bevel gear 8 to rotate, and the rotation of the bevel gear 8 drives the slave gear 10 to rotate. The rotation of the slave gear 10 drives the screw rod 9 to rotate, and the rotation of the screw rod 9 drives the thread block 11 to rotate. The rotation of the thread block 11 drives the clamping plate 12 to move toward the workpiece. The four corners of the workpiece are clamped by the clamping plate 12 to prevent the workpiece from moving during welding, resulting in the deviation of the welding position and affecting the accuracy of welding. At the same time, the clamping plate The movement of 12 toward the direction close to the workpiece will drive the sliding rod 13 to move toward the workpiece. The movement of the sliding rod 13 toward the direction close to the workpiece will contact the workpiece, and the workpiece will squeeze the sliding rod 13 to move toward the protective cover 2. The movement of the sliding rod 13 toward the direction close to the protective cover 2 will squeeze the sliding plate 15 to move downward. The downward movement of the sliding plate 15 will drive the short rod 16 to move downward. The downward movement of the short rod 16 will drive the limiting plate 17 to move downward. The workpiece is squeezed by the downward movement of the limiting plate 17 to prevent shaking during welding, which causes unstable welding. The limiting plate 17 is pressed to improve the stability of welding.

[0023] See also Figure 1-Figure 7On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a correction device for correcting the workpiece is arranged inside the placement plate 18, and a protective device is arranged on the correction device. The correction device comprises an L-shaped rod 191, an elastic telescopic rod 192, a correction plate 193 and a guide plate 194. The L-shaped rod 191 is fixedly mounted on the top of the threaded block 11, a slide groove is provided on the surface of the placement plate 18, and an elastic telescopic rod 192 is fixedly mounted on the inner wall of the slide groove. The correction plate 193 is fixedly mounted on the fixed end of the elastic telescopic rod 192, and the guide plate 194 is fixedly mounted on a side of the correction plate 193 away from the elastic telescopic rod 192. The position of the workpiece is corrected by moving the correction plate 193 toward the workpiece to prevent the workpiece from being offset during placement, and the workpiece cannot be clamped accurately during clamping, which causes problems in subsequent welding.

[0024] A push rod 195 is fixedly installed at the fixed end of the elastic telescopic rod 192, and the elastic telescopic rod 192 is fixedly installed on the inner wall of the slide groove. A support plate 197 is fixedly installed on the top of the trapezoidal block 196. By lifting the workpiece, the operator and equipment can better control the welding angle and position, reduce the occurrence of welding defects, and improve the strength and consistency of the weld.

[0025] The push rod 195 is in contact with the surface of the trapezoidal block 196, and a No. 3 spring is arranged between the slide groove and the trapezoidal block 196, and the trapezoidal block 196 is driven to reset by the No. 3 spring.

[0026] The protective device includes a connecting rod 201, an L-shaped plate 202, a limit frame 203 and an elastic telescopic block 204. The connecting rod 201 is fixedly mounted on the surface of the trapezoidal block 196, the L-shaped plate 202 is fixedly mounted on the end of the connecting rod 201 away from the trapezoidal block 196, the elastic telescopic block 204 is fixedly mounted on a side of the revolving door 3 close to the welding equipment 6, and the limit frame 203 is fixedly mounted on the free end of the elastic telescopic block 204, so that the revolving door 3 cannot be opened to prevent the user from mistakenly operating the revolving door 3 during welding. The sparks generated by welding may splash into people's eyes, posing a safety hazard.

[0027] A pull rod 205 is fixedly installed on the free end of the elastic telescopic block 204, and a protective shell 206 is slidably installed on the side of the revolving door 3 away from the pull rod 205. A short plate 207 is fixedly installed on the surface of the protective shell 206, and an elastic telescopic plate 208 is fixedly installed on the side of the revolving door 3 away from the pull rod 205. The provision of the protective shell 206 can prevent the operator from operating incorrectly, which may cause the revolving door 3 to open and affect the safety of the equipment.

[0028] The L-shaped plate 202 is arranged below the limiting frame 203, and a No. 4 spring is arranged between the revolving door 3 and the protective shell 206, and the No. 4 spring drives the protective shell 206 to reset.

[0029] When the present embodiment is working, the threaded block 11 moves toward the workpiece, driving the L-shaped rod 191 to move toward the workpiece. The L-shaped rod 191 moves toward the workpiece, which pushes the guide plate 194 to move toward the workpiece. The guide plate 194 moves toward the workpiece, which drives the correction plate 193 to move toward the workpiece. The correction plate 193 moves toward the workpiece to correct the position of the workpiece, preventing the workpiece from shifting during placement, resulting in the inability to accurately clamp the workpiece during clamping, which causes problems in subsequent welding. At the same time, the correction plate 193 moves toward the workpiece. The movement in the direction of the workpiece will squeeze the elastic telescopic rod 192 to move towards the workpiece, and the movement of the elastic telescopic rod 192 towards the workpiece will drive the push rod 195 to move towards the workpiece, and the movement of the push rod 195 towards the workpiece will push the trapezoidal block 196 to move upward, and the upward movement of the trapezoidal block 196 will drive the support plate 197 to move upward. The bottom of the workpiece is supported by the upward movement of the support plate 197. By lifting the workpiece, the operator and equipment can better control the welding angle and position, reduce the occurrence of welding defects, and improve the strength and consistency of the weld.

[0030] The upward movement of the trapezoidal block 196 drives the connecting rod 201 to move upward, and the upward movement of the connecting rod 201 drives the L-shaped plate 202 to move upward, and the L-shaped plate 202 moves upward and is stuck in the limit frame 203, and the L-shaped plate 202 is limited by the limit frame 203, so that the revolving door 3 cannot be opened, so as to prevent the user from misoperating and causing the revolving door 3 to open during welding. Sparks generated by welding may splash into people's eyes, posing a safety hazard. At the same time, when emergency maintenance is needed, the pull rod 205 is pulled upward, and the upward movement of the pull rod 205 drives the free end of the elastic telescopic block 204 to move upward, and the upward movement of the free end of the elastic telescopic block 204 drives the limit frame 203 moves upward, and the upward movement of the limit frame 203 will release the limit of the limit frame 203 by the L-shaped plate 202, so that the revolving door 3 can be opened normally, thereby improving the applicability of the equipment. At the same time, when the pull rod 205 needs to be pulled upward, it is necessary to push the protective shell 206 upward first, and the upward movement of the protective shell 206 will drive the short plate 207 to move upward, and the upward movement of the short plate 207 will be released to the free end of the elastic telescopic plate 208. The elastic telescopic plate 208 will limit the short plate 207 to prevent the No. 4 spring from driving the protective shell 206 to reset when letting go. Through the setting of the protective shell 206, it is prevented that the operator misoperates, causing the revolving door 3 to open, affecting the safety of the equipment.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for power tower anchor bolt assembly, characterized in that: include: A hollow base (1), a protective cover (2) being fixedly mounted on the top of the hollow base (1), a revolving door (3) being rotatably mounted on the inner wall of the protective cover (2), a driving device (4) being fixedly mounted on the top of the inner wall of the protective cover (2), an electric telescopic rod (5) being fixedly mounted on the output end of the driving device (4), and a welding device (6) being fixedly mounted on the output end of the electric telescopic rod (5); A clamping device, the clamping device is arranged on the top of the hollow base (1), the clamping device comprises a motor (7), a bevel gear (8), a screw rod (9), a slave gear (10), a threaded block (11), a clamping plate (12), a sliding rod (13), a fixed plate (14), a sliding plate (15), a short rod (16), a limit plate (17) and a placement plate (18), the motor (7) is fixedly mounted on the bottom of the hollow base (1), the bevel gear (8) is fixedly mounted on the output end of the motor (7), a groove is formed on the top of the hollow base (1), the screw rod (9) is rotatably mounted on the inner wall of the groove, and the slave gear (10) is fixedly mounted on the screw rod. The rod (9) is on a side away from the groove, the bevel gear (8) meshes with the surface of the secondary gear (10), the threaded block (11) is threadedly mounted on the circumferential surface of the screw rod (9), the clamping plate (12) is fixedly mounted on the top of the threaded block (11), the sliding rod (13) slides through the surface of the clamping plate (12), the fixed plate (14) is fixedly mounted on the surface of the clamping plate (12), the sliding plate (15) is slidably mounted on the surface of the fixed plate (14), the short rod (16) is fixedly mounted on the surface of the sliding plate (15), the limit plate (17) is fixedly mounted on the bottom of the short rod (16), and the placement plate (18) is fixedly mounted on the top of the hollow base (1); Wherein, a correction device for correcting the anchor bolts is arranged inside the placement plate (18), and a protective device is arranged on the correction device.

2. The automatic welding device for power tower anchor bolt assembly according to claim 1 is characterized in that: A No. 1 spring is provided between the sliding rod (13) and the clamping plate (12), and a No. 2 spring is provided between the sliding plate (15) and the fixed plate (14).

3. The automatic welding device for power tower anchor bolt assembly according to claim 2 is characterized in that: The correction device comprises an L-shaped rod (191), an elastic telescopic rod (192), a correction plate (193) and a guide plate (194); the L-shaped rod (191) is fixedly mounted on the top of the threaded block (11); a sliding groove is provided on the surface of the placement plate (18); the elastic telescopic rod (192) is fixedly mounted on the inner wall of the sliding groove; the correction plate (193) is fixedly mounted on the fixed end of the elastic telescopic rod (192); and the guide plate (194) is fixedly mounted on a side of the correction plate (193) away from the elastic telescopic rod (192).

4. The automatic welding device for power tower anchor bolt assembly according to claim 3 is characterized in that: A push rod (195) is fixedly mounted on the fixed end of the elastic telescopic rod (192), a trapezoidal block (196) is slidably mounted on the inner wall of the slide groove, and a support plate (197) is fixedly mounted on the top of the trapezoidal block (196).

5. The automatic welding device for power tower anchor bolt assembly according to claim 4 is characterized in that: The push rod (195) is in surface contact with the trapezoidal block (196), and a No. 3 spring is provided between the slide groove and the trapezoidal block (196).

6. The automatic welding device for power tower anchor bolt assembly according to claim 5 is characterized in that: The protective device comprises a connecting rod (201), an L-shaped plate (202), a limiting frame (203) and an elastic telescopic block (204); the connecting rod (201) is fixedly mounted on the surface of the trapezoidal block (196); the L-shaped plate (202) is fixedly mounted on an end of the connecting rod (201) away from the trapezoidal block (196); the elastic telescopic block (204) is fixedly mounted on a side of the revolving door (3) close to the welding equipment (6); and the limiting frame (203) is fixedly mounted on the free end of the elastic telescopic block (204).

7. The automatic welding device for power tower anchor bolt assembly according to claim 6 is characterized in that: A pull rod (205) is fixedly mounted on the free end of the elastic telescopic block (204); a protective shell (206) is slidably mounted on a side of the revolving door (3) away from the pull rod (205); a short plate (207) is fixedly mounted on the surface of the protective shell (206); and an elastic telescopic plate (208) is fixedly mounted on a side of the revolving door (3) away from the pull rod (205).

8. The automatic welding device for power tower anchor bolt assembly according to claim 7 is characterized in that: The L-shaped plate (202) is arranged below the limiting frame (203), and a No. 4 spring is arranged between the rotating door (3) and the protective shell (206).

9. A method for using an automatic welding device for an electric power tower foundation bolt assembly, using the automatic welding device for an electric power tower foundation bolt assembly according to claim 8, characterized in that: The following steps are involved: Step 1: placing the workpiece on a placement plate (18), and welding the workpiece by using a driving device (4), an electric telescopic rod (5) and a welding device (6); Step 2: The motor (7) is driven to rotate the bevel gear (8), the rotation of the bevel gear (8) drives the slave gear (10) to rotate, the rotation of the slave gear (10) drives the screw rod (9) to rotate, the rotation of the screw rod (9) drives the thread block (11) to rotate, the rotation of the thread block (11) drives the clamping plate (12) to move in a direction close to the workpiece, and the four corners of the workpiece are clamped by the clamping plate (12) to prevent the workpiece from moving during welding, causing the welding position to be offset and affecting the welding accuracy; Step 3: The clamping plate (12) moves toward the workpiece, driving the sliding rod (13) to move toward the workpiece. The sliding rod (13) moves toward the workpiece and contacts the workpiece. The workpiece presses the sliding rod (13) to move toward the protective cover (2). Step 4: The sliding rod (13) is moved in a direction close to the protective cover (2) to squeeze the sliding plate (15) downward. The downward movement of the sliding plate (15) drives the short rod (16) downward. The downward movement of the short rod (16) drives the limit plate (17) downward. The limit plate (17) moves downward to squeeze the workpiece to prevent shaking during welding, which causes unstable welding. The limit plate (17) is pressed to improve the stability of welding.

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