Automatic clamping mechanism for welding electric power tower foot

Abstract

The application discloses a kind of automatic clamping mechanisms for welding electric power tower foot, it is related to the technical field of automated welding, including: tool adapter, the clamping tool main body is fixedly installed on the top of tool adapter, the tool support is fixedly installed on the top of clamping tool main body, the tower foot workpiece is arranged on the top of tool support, the fixed bearing seat is rotatably installed on the inner wall of tool support, the support bearing seat is fixedly installed on the top of tool support, the clamping lead screw is fixedly installed on the end of fixed bearing seat away from clamping tool main body, the nut is screw-mounted on the surface of clamping lead screw, the tower foot workpiece is clamped by clamping block, effectively solve the difficult operation, high risk, unreliable and a series of problems such as unreliable caused by traditional manual clamping tower foot, improve the automation rate of equipment, significantly reduce the number of manual participation processing, so that an operator can take care of more equipment, improve enterprise efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of automated welding, in particular to an automatic clamping mechanism for welding power tower legs. Background Art

[0002] Introduction to power tower feet: The tower foot structure is mainly composed of a base plate, a sub-plate, and a small rib plate. Each tower foot has different sizes, but the base plate is usually a square or a regular octagon. In addition, the tower foot serves as the supporting component of the tower and bears the gravity and tension of the tower body. The tower foot has high requirements for welding strength and welding deformation.

[0003] Patent announcement number CN219665534U relates to a pressure plate fixture device for automatic welding of angle steel tower legs, belonging to the technical field of angle steel tower leg welding. The pressure plate fixture device for automatic welding of angle steel tower legs includes a support mechanism, a first clamping mechanism, a second clamping mechanism, a drive mechanism, and a pair of differential mechanisms. The support mechanism includes a support frame mounted on one side of the fixed base, a connecting seat mounted on the top of the support frame, and mounting cavities are provided inside the fixed base, support frame, and connecting seat. The patent enables a single drive component to drive the first clamping mechanism and the second clamping mechanism to operate, thereby reducing power consumption and reducing maintenance time for the drive components.

[0004] In the above patent, the first clamping mechanism and the second clamping mechanism are driven by a driving component to reduce power consumption and reduce maintenance time of the driving component. However, since the tower foot welding has high requirements for welds and the consistency of manually welded products is poor, the leading power equipment manufacturers have begun to introduce automated welding. In order to increase the penetration depth and improve welding efficiency, it is necessary to use a fixture to clamp the tower foot, and then place it on a positioner to weld the welds one by one. The clamping solutions currently on the market usually adopt a method of manually clamping the base plate from two directions. Because the tower foot itself is heavy, the operation workload is large and dangerous, especially after the welding is completed, the clamping claws will be stuck due to deformation of the clamped base plate, and manpower is usually not enough to loosen the claws. On-site operators will use hammers or other heavy objects to hammer the handle, which will cause damage to the mechanism in the long run. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic clamping mechanism for welding power tower legs, which solves the problems raised in the above-mentioned background technology.

[0006] The top of the fixing device is fixedly mounted on the fixing plate, and the fixing plate is fixedly mounted on the fixing plate, wherein the fixing plate is fixedly mounted on the fixing plate, and the fixing plate is fixedly mounted on the fixing plate. The driving motor drives the driving synchronous belt pulley to rotate, and the rotation of the driving synchronous belt pulley drives the driven synchronous belt pulley to rotate. The rotation of the driven synchronous belt pulley drives the clamping screw to rotate. The protective cover is fixedly installed on the tool support top, and the support plate is fixedly installed on the top of the clamping seat, and the elastic telescopic rod is fixedly installed on a side of the support plate close to the clamping block, the free end of the elastic telescopic rod passes through the clamping block, and the connecting rod is fixedly installed on the free end of the elastic telescopic rod,

[0007] According to the above technical solution, the pulley is arranged below the rotating plate, and a No. 1 torsion spring is arranged between the rotating plate and the clamping block, and the rotating plate is driven to reset by the No. 1 torsion spring.

[0008] According to the above technical solution, a lubrication device for lubricating the clamping screw is provided on the support plate, and a stirring device is provided inside the lubrication device. The lubrication device includes a lubrication box, an oil inlet, a sealing cover, a hollow tube and a brush. The reciprocating motion of the clamping seat drives the support plate to reciprocate, and the reciprocating motion of the support plate drives the lubrication box to reciprocate, and the reciprocating motion of the lubrication box drives the hollow tube to reciprocate. The lubrication box is fixedly installed on the side of the support plate away from the clamping block, the oil inlet is connected and installed on the top of the lubrication box, the sealing cover is rotatably installed on the surface of the oil inlet, the hollow tube is connected and installed on the bottom of the lubrication box, and the brush is fixedly installed on the bottom of the hollow tube.

[0009] According to the above technical solution, a sealing ring is fixedly installed on the inner wall of the hollow tube, a telescopic connecting rod is fixedly installed on the top of the sealing ring, a circular plate is fixedly installed on the top of the telescopic connecting rod, a trapezoidal block is fixedly installed on the top of the circular plate, a long rod is fixedly installed on the bottom of the circular plate, and a sealing plate is fixedly installed on the bottom of the long rod. An extrusion rod slides through the side of the lubrication box away from the support plate. The circular plate moves downward to drive the long rod to move downward, and the long rod moves downward to drive the sealing plate to move downward. The sealing plate moves downward to disengage from the sealing ring, so that the lubricating oil inside the hollow tube flows onto the brush.

[0010] According to the above technical solution, the sealing ring contacts the surface of the sealing plate, a No. 1 spring is provided between the lubrication box and the extrusion rod, and the No. 1 spring drives the extrusion rod to reset, and the extrusion rod contacts the surface of the trapezoidal block.

[0011] According to the above technical solution, the stirring device includes a connecting screw rod, a short plate, a circular ring, a spiral barrel and a stirring plate. The circular plate moves downward to drive the connecting screw rod to move downward. The downward movement of the connecting screw rod will drive the spiral barrel to rotate along the spiral groove of the connecting screw rod. The rotation of the spiral barrel will drive the stirring plate to rotate. The connecting screw rod is fixedly installed on the top of the circular plate, the short plate is fixedly installed on the inner wall of the lubrication box, the circular ring is fixedly installed on the side of the short plate away from the lubrication box, the spiral barrel is rotatably installed on the inner wall of the circular ring, and the stirring plate is fixedly installed on the circumferential surface of the spiral barrel.

[0012] According to the above technical solution, a rotating plate is rotatably installed on the inner wall of the lubrication box, a fixed plate is fixedly installed on the inner wall of the lubrication box, and a limiting plate is fixedly installed on the circumferential surface of the rotating plate. When the circular plate is driven to reset by the telescopic connecting rod, the upward movement of the circular plate will drive the stirring plate to rotate in the opposite direction, and the reverse rotation of the stirring plate will contact the rotating plate.

[0013] According to the above technical solution, a No. 2 torsion spring is provided between the lubrication box and the rotating plate, and the No. 2 torsion spring drives the rotating plate to reset. The rotating plate is provided above the stirring plate, and the limiting plate contacts the surface of the fixed plate.

[0014] The present invention provides an automatic clamping mechanism for welding power tower legs. It has the following beneficial effects:

[0015] (1) This invention can effectively solve a series of problems such as difficult operation, high risk and unreliability caused by traditional manual clamping of tower feet by clamping the tower foot workpiece through the clamping block, improve the automation rate of the equipment, significantly reduce the number of times of manual participation in processing, so that one operator can take care of more equipment and improve the efficiency of the enterprise. At the same time, the tower foot workpiece is limited by rotating the pressure plate downward to prevent the vibration generated during welding from causing unstable clamping of the tower foot workpiece and affecting the welding effect.

[0016] (2) This invention drives the reciprocating motion of the hollow tube by the reciprocating motion of the lubrication box, which in turn drives the reciprocating motion of the brush. The lubricating oil on the brush is evenly applied to the clamping screw by the reciprocating motion of the brush, thereby preventing the equipment from aging due to long-term use and affecting the clamping effect of the equipment. The downward movement of the sealing plate will disengage the sealing ring, causing the lubricating oil inside the hollow tube to flow onto the brush and be evenly applied to the clamping screw by the brush. By intermittently lubricating the clamping screw, excessive lubrication is prevented, thereby increasing the service life of the equipment.

[0017] (3) In this invention, the downward movement of the connecting screw rod drives the spiral barrel to rotate along the spiral groove of the connecting screw rod. The rotation of the spiral barrel drives the stirring plate to rotate. The stirring plate can ensure that the various components in the lubricating oil are evenly mixed, thereby improving the performance and stability of the lubricating oil. At the same time, the rotation of the stirring plate will contact the rotating plate to generate vibration. The vibration can help the lubricating oil flow more smoothly, ensuring that it can fully cover and penetrate all contact surfaces, thereby improving the lubrication effect. At the same time, the reverse rotation of the stirring plate will contact the rotating plate, and the stirring plate will push the rotating plate to rotate upward, which will not hinder the resetting of the stirring plate, thereby improving the efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 Schematic diagram of the overall internal structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall bottom structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the protective cover of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the protective cover of the present invention;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the lubrication box of the present invention;

[0024] Figure 7 For the present invention Figure 6 A schematic diagram of the structure of part A in the middle;

[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the hollow tube of the present invention.

[0026] Figure: 1, tool adapter; 2, clamping tool body; 3, tool support; 4, tower foot workpiece; 5, fixed bearing seat; 6, support bearing seat; 7, clamping screw; 8, nut; 9, clamping seat; 10, clamping block; 11, guide rail; 12. Slider; 13. Bevel gear; 14. Driven synchronous pulley; 15. Drive motor; 16. Active synchronous pulley; 17. Synchronous belt; 18. Protective cover; 19. Support plate; 20. Elastic telescopic rod; 21. Connecting rod; 22. L-shaped rod; 23. Pulley; 24. Turn plate; 25. Pressing plate; 261. Lubrication box; 262. Oil inlet; 263. Sealing cover; 264. Hollow tube; 265. Brush; 266. Sealing ring; 267. Telescopic connecting rod; 268. Circular plate; 269. Trapezoidal block; 2610. Long rod; 2611. Sealing plate; 2612. Extrusion rod; 271. Connecting screw rod; 272. Short plate; 273. Circular ring; 274. Spiral barrel; 275. Stirring plate; 276. Rotating plate; 277. Fixed plate; 278. Limiting plate. DETAILED DESCRIPTION

[0027] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 4One embodiment of the present invention is: an automatic clamping mechanism for welding power tower feet, comprising: a tool adapter 1, a clamping tool body 2 is fixedly installed on the top of the tool adapter 1, a tool support 3 is fixedly installed on the top of the clamping tool body 2, a tower foot workpiece 4 is set on the top of the tool support 3, a fixed bearing seat 5 is rotatably installed on the inner wall of the tool support 3, a support bearing seat 6 is fixedly installed on the top of the tool support 3, a clamping screw 7 is fixedly installed on the end of the fixed bearing seat 5 away from the clamping tool body 2, a nut 8 is threadedly installed on the surface of the clamping screw 7, a clamping seat 9 is fixedly installed on the top of the nut 8, and a clamping block 1 is fixedly installed on the top of the clamping seat 9 0, the guide rail 11 is fixedly mounted on the top of the tooling support 3, the slider 12 is fixedly mounted on the bottom of the clamping seat 9, the slider 12 is slidably mounted on the top of the guide rail 11, the end of the clamping screw 7 away from the fixed bearing seat 5 is fixedly mounted with a bevel gear 13, the driven synchronous pulley 14 is fixedly mounted on the surface of the clamping screw 7, the bottom of the clamping tool body 2 is fixedly mounted with a driving motor 15, the output end of the driving motor 15 is fixedly mounted with an active synchronous pulley 16, a synchronous belt 17 is installed between the driven synchronous pulley 14 and the active synchronous pulley 16, and a welding device is provided on the right side of the tooling adapter 1, by which the tower foot workpiece 4 can be welded;

[0029] The limiting device is arranged on the top of the clamping seat 9. The limiting device includes a protective cover 18, a support plate 19, an elastic telescopic rod 20, a connecting rod 21, an L-shaped rod 22, a pulley 23, a rotating plate 24 and a pressing plate 25. The tower foot workpiece 4 is clamped by the clamping block 10, which can effectively solve a series of problems such as difficult operation, high risk, and unreliability caused by traditional manual clamping of the tower foot, improve the automation rate of the equipment, significantly reduce the number of times manual participation in processing, so that an operator can look after more equipment, and improve the efficiency of the enterprise. The protective cover 18 is fixedly installed on the top of the tooling support 3, and the support plate 19 is fixed It is fixedly installed on the top of the clamping seat 9, the elastic telescopic rod 20 is fixedly installed on the side of the support plate 19 close to the clamping block 10, the free end of the elastic telescopic rod 20 passes through the clamping block 10, the connecting rod 21 is fixedly installed on the free end of the elastic telescopic rod 20, the L-shaped rod 22 is fixedly installed on the surface of the connecting rod 21, the pulley 23 is rotatably installed on the top of the L-shaped rod 22, the rotating plate 24 is rotatably installed on the surface of the clamping block 10, and the pressure plate 25 is fixedly installed on the circumferential surface of the rotating plate 24. The tower foot workpiece 4 is limited by rotating the pressure plate 25 downward to prevent the vibration generated during welding from causing unstable clamping of the tower foot workpiece 4 and affecting the welding effect.

[0030] The pulley 23 is arranged below the rotating plate 24. A torsion spring No. 1 is arranged between the rotating plate 24 and the clamping block 10, and the rotating plate 24 is driven to reset by the torsion spring No. 1.

[0031] When this embodiment is working, the driving motor 15 drives the active synchronous pulley 16 to rotate, and the rotation of the active synchronous pulley 16 drives the synchronous belt 17 to rotate. The rotation of the synchronous belt 17 drives the driven synchronous pulley 14 to rotate. The rotation of the driven synchronous pulley 14 drives the clamping screw 7 to rotate. The rotation of the clamping screw 7 drives the bevel gear 13 to rotate. After the bevel gear 13 rotates, the remaining bevel gears 13 also move at the same speed. At the same time, the rotation of the clamping screw 7 drives the nut 8 to move in the direction close to the tower foot workpiece 4. The movement of the nut 8 in the direction close to the tower foot workpiece 4 drives the clamping seat 9 to move in the direction close to the tower foot workpiece 4. The movement of the clamping seat 9 in the direction close to the tower foot workpiece 4 drives the clamping block 10 to move in the direction close to the tower foot workpiece 4. The tower foot workpiece 4 is clamped by the clamping block 10, which can effectively solve a series of problems such as difficult operation, high risk, and unreliability caused by traditional manual clamping of the tower foot, thereby improving the automation of the equipment. The movement of the clamping seat 9 toward the tower foot workpiece 4 will drive the supporting plate 19 to move toward the tower foot workpiece 4, and the movement of the supporting plate 19 toward the tower foot workpiece 4 will drive the elastic telescopic rod 20 to move toward the tower foot workpiece 4. After the elastic telescopic rod 20 moves toward the tower foot workpiece 4 and contacts the tower foot workpiece 4, the free end of the elastic telescopic rod 20 will contract. The contraction of the free end of the elastic telescopic rod 20 will drive the connecting rod 21, the L-shaped rod 22 and the pulley 23 to move toward the support plate 19. The movement of the pulley 23 toward the support plate 19 will push the rotating plate 24 to rotate upward. The upward rotation of the rotating plate 24 will drive the pressing plate 25 to rotate downward, and the tower foot workpiece 4 will be limited by the downward rotation of the pressing plate 25 to prevent the vibration generated during welding from causing the tower foot workpiece 4 to be clamped unstable, affecting the welding effect.

[0032] See also Figures 1-8 On the basis of the above embodiment, in another embodiment of the present invention, a lubrication device for lubricating the clamping screw 7 is provided on the support plate 19, and a stirring device is provided inside the lubrication device. The lubrication device includes a lubrication box 261, an oil inlet 262, a sealing cover 263, a hollow tube 264 and a brush 265. The lubrication box 261 is fixedly mounted on the side of the support plate 19 away from the clamping block 10, the oil inlet 262 is connected and installed on the top of the lubrication box 261, the sealing cover 263 is rotatably mounted on the surface of the oil inlet 262, the hollow tube 264 is connected and installed at the bottom of the lubrication box 261, and the brush 265 is fixedly mounted on the bottom of the hollow tube 264. The lubricating oil on the brush 265 is evenly applied to the clamping screw 7 through the reciprocating motion of the brush 265 to prevent the equipment from aging due to long-term use and affecting the clamping effect of the equipment.

[0033] A sealing ring 266 is fixedly installed on the inner wall of the hollow tube 264, a telescopic link 267 is fixedly installed on the top of the sealing ring 266, a circular plate 268 is fixedly installed on the top of the telescopic link 267, a trapezoidal block 269 is fixedly installed on the top of the circular plate 268, a long rod 2610 is fixedly installed on the bottom of the circular plate 268, and a sealing plate 2611 is fixedly installed on the bottom of the long rod 2610. The side of the lubrication box 261 away from the support plate 19 is slid through by an extrusion rod 2612, which is evenly applied to the clamping screw 7 through the brush 265. The clamping screw 7 is lubricated intermittently to prevent excessive lubrication and improve the service life of the equipment.

[0034] The sealing ring 266 contacts the surface of the sealing plate 2611 , and a No. 1 spring is provided between the lubrication box 261 and the extrusion rod 2612 . The No. 1 spring drives the extrusion rod 2612 to reset, and the extrusion rod 2612 contacts the surface of the trapezoidal block 269 .

[0035] The stirring device includes a connecting screw rod 271, a short plate 272, a ring 273, a spiral barrel 274 and a stirring plate 275. The connecting screw rod 271 is fixedly mounted on the top of the circular plate 268, the short plate 272 is fixedly mounted on the inner wall of the lubrication box 261, the ring 273 is fixedly mounted on the side of the short plate 272 away from the lubrication box 261, the spiral barrel 274 is rotatably mounted on the inner wall of the ring 273, and the stirring plate 275 is fixedly mounted on the circumferential surface of the spiral barrel 274. The stirring plate 275 can ensure that the various components in the lubricating oil are evenly mixed, thereby improving the performance and stability of the lubricating oil.

[0036] A rotating plate 276 is rotatably installed on the inner wall of the lubrication box 261, and a fixed plate 277 is fixedly installed on the inner wall of the lubrication box 261. A limit plate 278 is fixedly installed on the circumferential surface of the rotating plate 276. The stirring plate 275 will push the rotating plate 276 to rotate upward, and will not hinder the resetting of the stirring plate 275, thereby improving the efficiency of the equipment.

[0037] A No. 2 torsion spring is provided between the lubrication box 261 and the rotating plate 276 , which drives the rotating plate 276 to reset. The rotating plate 276 is arranged above the stirring plate 275 , and the limiting plate 278 is in contact with the surface of the fixed plate 277 .

[0038] The reciprocating motion of the clamping seat 9 drives the support plate 19 to move back and forth, and the reciprocating motion of the support plate 19 drives the lubrication box 261 to move back and forth, and the reciprocating motion of the lubrication box 261 drives the hollow tube 264 to move back and forth, and the reciprocating motion of the hollow tube 264 drives the brush 265 to move back and forth, and the lubricating oil on the brush 265 is evenly applied to the clamping screw 7 through the reciprocating motion of the brush 265 to prevent the equipment from aging after long-term use, which affects the clamping effect of the equipment. At the same time, the movement of the support plate 19 in the direction away from the tower foot workpiece 4 will drive the extrusion rod 2612 to move away from the tower foot workpiece 4, and the extrusion rod 2612 moves away from the tower foot workpiece 4 to contact the protective cover 18, which will squeeze the extrusion rod 261 2 moves toward the inside of the lubrication box 261. The movement of the extrusion rod 2612 toward the inside of the lubrication box 261 will push the trapezoidal block 269 to move downward. The downward movement of the trapezoidal block 269 will push the circular plate 268 to move downward. The downward movement of the circular plate 268 will seal the hollow tube 264. At the same time, the downward movement of the circular plate 268 will drive the long rod 2610 to move downward. The downward movement of the long rod 2610 will drive the sealing plate 2611 to move downward. The downward movement of the sealing plate 2611 will disengage from the sealing ring 266, so that the lubricating oil inside the hollow tube 264 flows into the brush 265 and is evenly applied to the clamping screw 7 through the brush 265. By intermittently lubricating the clamping screw 7, excessive lubrication is prevented and the service life of the equipment is improved.

[0039] The circular plate 268 moves downward to drive the connecting screw rod 271 to move downward. The downward movement of the connecting screw rod 271 will drive the spiral barrel 274 to rotate along the spiral groove of the connecting screw rod 271. The rotation of the spiral barrel 274 will drive the stirring plate 275 to rotate. The stirring plate 275 can ensure that the various components in the lubricating oil are evenly mixed, thereby improving the performance and stability of the lubricating oil. At the same time, the stirring plate 275 will contact the rotating plate 276 during the rotation, and the rotating plate 276 will be limited by the limiting plate 278, so that the stirring plate 275 will contact the rotating plate 276 when it rotates, generating vibration. The vibration can help the lubricating oil flow more smoothly, ensuring that it can fully cover and penetrate all contact surfaces, thereby improving the lubrication effect. At the same time, when the telescopic connecting rod 267 drives the circular plate 268 to reset, the circular plate 268 moves upward to drive the stirring plate 275 to rotate in the opposite direction. The stirring plate 275 rotates in the opposite direction and contacts the rotating plate 276. The stirring plate 275 will push the rotating plate 276 to rotate upward, and will not hinder the resetting of the stirring plate 275, thereby improving the efficiency of the equipment.

[0040] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic clamping mechanism for welding power tower legs, characterized in that: include: The top of the tool attachment piece is fixedly mounted on the top of the tool attachment piece, and the top of the tool attachment piece is fixedly mounted on the tool attachment piece, and the top of the tool attachment piece is fixedly mounted on the tool attachment piece, and the tower foot workpiece is provided on the top of the tool support. The inner wall of the tool support is rotatably mounted on the fixed bearing seat, and the support bearing seat is fixedly mounted on the top of the tool support. A limiting device is arranged on the top of the clamping seat, and the limiting device includes a protective cover, a support plate, an elastic telescopic rod, a connecting rod, an L-shaped rod, a pulley, a rotating plate and a pressure plate. The protective cover is fixedly mounted on the top of the tooling support, the support plate is fixedly mounted on the top of the clamping seat, the elastic telescopic rod is fixedly mounted on a side of the support plate close to the clamping block, the free end of the elastic telescopic rod passes through the clamping block, the connecting rod is fixedly mounted on the free end of the elastic telescopic rod, the L-shaped rod is fixedly mounted on the surface of the connecting rod, the pulley is rotatably mounted on the top of the L-shaped rod, the rotating plate is rotatably mounted on the surface of the clamping block, and the pressure plate is fixedly mounted on the circumferential surface of the rotating plate; wherein, the support plate is provided with a lubrication device for lubricating the clamping screw, the lubrication device comprising a lubrication box, an oil inlet, a sealing cover, a hollow tube and a brush, the lubrication box is fixedly mounted on a side of the support plate away from the clamping block, the oil inlet is connected and mounted on the top of the lubrication box, the sealing cover is rotatably mounted on the surface of the oil inlet, the hollow tube is connected and mounted on the bottom of the lubrication box, the brush is fixedly mounted on the bottom of the hollow tube, a sealing ring is fixedly mounted on the inner wall of the hollow tube, a telescopic connecting rod is fixedly mounted on the top of the sealing ring, a circular plate is fixedly mounted on the top of the telescopic connecting rod, a trapezoidal block is fixedly mounted on the top of the circular plate, a long rod is fixedly mounted on the bottom of the circular plate, a sealing plate is fixedly mounted on the bottom of the long rod, an extrusion rod is slidably penetrated on the side of the lubrication box away from the support plate, and a stirring device is provided inside the lubrication device; The sealing ring is in contact with the surface of the sealing plate, a spring No. 1 is provided between the lubrication box and the extrusion rod, and the extrusion rod is in contact with the surface of the trapezoidal block; The stirring device includes a connecting screw rod, a short plate, a circular ring, a spiral drum and a stirring plate, wherein the connecting screw rod is fixedly mounted on the top of the circular plate, the short plate is fixedly mounted on the inner wall of the lubrication box, the circular ring is fixedly mounted on the side of the short plate away from the lubrication box, the spiral drum is rotatably mounted on the inner wall of the circular ring, and the stirring plate is fixedly mounted on the circumferential surface of the spiral drum; The protective cover squeezes the extrusion rod to move into the lubrication box. The movement of the extrusion rod into the lubrication box pushes the trapezoidal block to move downward. The downward movement of the trapezoidal block pushes the circular plate to move downward. The downward movement of the circular plate seals the hollow pipe.

2. The automatic clamping mechanism for welding power tower legs according to claim 1, characterized in that: The pulley is arranged below the rotating plate, and a first torsion spring is arranged between the rotating plate and the clamping block.

3. The automatic clamping mechanism for welding power tower legs according to claim 2, characterized in that: A rotating plate is rotatably mounted on the inner wall of the lubrication box, a fixed plate is fixedly mounted on the inner wall of the lubrication box, and a limiting plate is fixedly mounted on the circumferential surface of the rotating plate.

4. The automatic clamping mechanism for welding power tower legs according to claim 3, characterized in that: A No. 2 torsion spring is provided between the lubrication box and the rotating plate. The rotating plate is provided above the stirring plate. The limiting plate is in contact with the surface of the fixed plate.

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