A welding device for a wind power tower

Abstract

The present application belongs to the technical field of wind power tower and cylinder welding, and discloses a kind of welding equipment for wind power tower and cylinder;Including shell and welding equipment main body, welding equipment main body is arranged in shell, still include:Support frame;The present application is adapted to component by being arranged, before welding, need make welding equipment main body and mobile assembly adapt to the camber of wind power tower and cylinder surface, start first electric push rod drive box movement, box drives mobile frame and contact column, so that multiple contact columns contact the surface of wind power tower and cylinder, multiple contact columns will be oppressed into box by wind power tower and cylinder, contact column is oppressed different distance at different positions, mobile frame is moved by contact column, and mobile frame moves can make straight rack produce deformation, so that straight rack adapts to the camber of wind power tower and cylinder surface, start first motor drive first gear walk on straight rack, so that welding equipment main body can walk along curved straight rack and adapt to the surface camber of wind power tower and cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power tower welding technology, more particularly, the present application relates to a kind of wind power tower welding equipment. BACKGROUND

[0002] Wind power tower is generally conical cylinder welded structural member, segmented manufacturing, each segment height is different from several ten meters to several thirty meters, adjacent section interval is connected using connecting flange, tower needs to bear dynamic load, so weld needs to have higher impact resistance and toughness, simultaneously, due to the complex environment of wind power tower, the protection of tower is also particularly important, wind power tower is adapted to external environment for a long time, and crack can be generated on its surface or weld, needs to use special welding equipment to repair and maintain the crack of wind power tower.

[0003] At present, after the crack of wind power tower surface or weld appears, it needs to use special welding equipment to repair and maintain, since the surface of wind power tower has camber, so when welding equipment welds crack, welding equipment needs to move along certain arc, so that the welding head of welding equipment and the surface of wind power tower can always maintain a certain appropriate distance, appropriate distance is maintained to ensure the best welding effect, but the welding equipment at present cannot move welding head according to the surface camber of wind power tower, i.e. cannot make welding head and the surface of wind power tower always maintain appropriate distance. SUMMARY

[0004] The present application is to solve the problem that the welding equipment at present cannot move welding head according to the surface camber of wind power tower in the background art, and proposes a kind of wind power tower welding equipment.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a kind of wind power tower welding equipment, including shell and welding equipment main body, welding equipment main body is arranged in shell, still include:

[0006] Support frame, support frame is fixedly connected to the top inner wall of shell, welding equipment main body is arranged on support frame, and moving assembly for driving welding equipment main body to move is arranged on support frame;

[0007] Box, box is fixedly connected to the bottom inner wall of shell, and the box is provided with adaptation assembly for making moving assembly and welding equipment main body adapt to the surface camber of wind power tower.

[0008] Further, the mobile assembly comprises a mounting plate slidably connected to the support frame, the welding equipment body is mounted on the mounting plate, a first motor is fixedly connected to the mounting plate, a first gear is fixedly connected to the output shaft of the first motor, a straight rack is arranged on one side of the first gear and engaged with the first gear, a T-shaped sliding groove is formed in the top of the straight rack, an L-shaped block is fixedly connected to the mounting plate, a T-shaped sliding block is fixedly connected to one end of the L-shaped block, and the T-shaped sliding block is slidably connected to the T-shaped sliding groove.

[0009] Further, the adaptive assembly comprises a cavity filled with liquid formed in the box, a first electric push rod is fixedly connected to the inner wall of the bottom of the shell, the sidewall of the box is fixedly connected to the output end of the first electric push rod, a plurality of rectangular openings in communication with the cavity are formed in the box, a moving frame is slidably connected in each of the rectangular openings, a contact column is fixedly connected to one end of the moving frame, a plurality of the contact columns are in the same plane, the straight rack is fixedly connected to the top of the plurality of moving frames, and the straight rack and the T-shaped sliding block are made of elastic material.

[0010] Further, a vacuum suction device is fixedly connected to the box, a telescopic hose is mounted on the vacuum suction device, a first connecting pipe is fixedly connected to one end of the hose, rotating cylinders are rotatably connected to two ends of the first connecting pipe, and a vacuum chuck is mounted on one end of the rotating cylinder.

[0011] Further, a second electric push rod is fixedly connected to the inner wall of the bottom of the shell through a fixing plate, a moving block is fixedly connected to the output end of the second electric push rod, an extrusion arc surface is fixedly connected to one end of the moving block, two moving plates are slidably connected to the inner wall of the bottom of the shell, one end of each moving plate is rotatably connected to the outer wall of the rotating cylinder, the other end of each moving plate is fixedly connected to a semicircular block, the extrusion arc surface is opposite to the semicircular block, and an elastic rope is fixedly connected between the moving plate and the inner wall of the shell.

[0012] Further, a box body is arranged above the shell, the fixing block is fixedly connected to the top of the box body, a second motor is fixedly connected to the box body, a second gear is fixedly connected to the output shaft of the second motor, an L-shaped plate is fixedly connected to the outer wall of the shell, the box body is slidably connected to the L-shaped plate, an L-shaped rack is fixedly connected to the L-shaped plate, and the L-shaped rack is engaged with the second gear.

[0013] Further, an air outlet device is fixedly connected to the moving frame, an air outlet channel is formed in each of the contact columns, a second connecting pipe is mounted on the air outlet device, one end of the second connecting pipe is in communication with one of the air outlet channels, and adjacent two air outlet channels are in communication through a connecting pipe.

[0014] Further, the side wall of the contact column is provided with a mounting groove, a cleaning brush is fixed in the mounting groove, a plurality of air outlets are arranged on the contact column, and the air outlet channel communicates with the mounting groove through the air outlet.

[0015] The technical effect and advantages of the welding equipment for the wind power tower are as follows:

[0016] (1) By setting the adaptive assembly, the welding equipment body and the moving assembly need to adapt to the arc of the surface of the wind power tower before welding, the first electric push rod drive box is started to drive the box to move, the box drives the moving frame and the contact column, so that the plurality of contact columns contact the surface of the wind power tower, the plurality of contact columns are pressed into the box by the wind power tower, the contact columns at different positions are pressed by different distances, the moving frame is driven to move by the contact columns, the moving of the moving frame can make the straight rack deform, so that the straight rack adapts to the arc of the surface of the wind power tower, and the first motor is started to drive the first gear to walk on the straight rack, so that the welding equipment body can walk along the curved straight rack to adapt to the surface arc of the wind power tower.

[0017] (2) By setting the vacuum chuck, the vacuum chuck needs to be adsorbed on the wind power tower before welding, the vacuum equipment is started to fix the shell on the wind power tower through the vacuum chuck, when the welding path is inclined, the second electric push rod is started to drive the moving block to move, the moving block extrudes one of the semicircular blocks through extruding the arc surface, the semicircular block drives one of the vacuum chucks to contact the surface of the wind power tower through the moving plate, so that the vacuum chuck is adsorbed on the surface, and the steel wire can make the shell rotate around the vacuum chuck, so as to realize that the welding path is inclined. BRIEF DESCRIPTION OF DRAWINGS

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

[0019] Figure 2 It is a schematic diagram of the shell in the present application;

[0020] Figure 3 It is a schematic diagram of the internal structure of the shell in the present application;

[0021] Figure 4 It is a schematic diagram of the T-shaped slider and the straight rack structure in the present application;

[0022] Figure 5 It is a schematic diagram of the moving block and the semicircular block structure in the present application;

[0023] Figure 6 It is a schematic diagram of the contact column and the air outlet equipment structure in the present application;

[0024] Figure 7 It is a schematic diagram of the contact column in the present application.

[0025] In the picture:

[0026] 1. Shell; 2. Main body of welding equipment; 3. Support frame; 4. Mounting plate; 5. First motor; 6. First gear; 7. L-shaped block; 8. T-shaped slider; 9. Straight rack; 10. T-shaped slide rail; 11. First electric push rod; 12. Box; 13. Cavity; 14. Rectangular opening; 15. Moving frame; 16. Contact column; 17. Vacuum suction device; 18. Hoses; 19. First connecting pipe; 20. Rotating cylinder; 21. 21. Empty suction cup; 22. Second electric push rod; 23. Moving block; 24. Extrusion arc surface; 25. Moving plate; 26. Semicircular block; 27. Elastic rope; 28. Fixing block; 29. ​​Box body; 30. Second motor; 31. Second gear; 32. L-shaped plate; 33. L-shaped rack; 34. Air outlet device; 35. Second connecting pipe; 36. Air outlet channel; 37. Connecting pipe; 38. Mounting groove; 39. Cleaning brush; 40. Air outlet hole. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Reference Figure 1 - Figure 7 A welding device for wind turbine towers includes a housing 1 and a welding device body 2, wherein the welding device body 2 is disposed inside the housing 1, and further includes:

[0029] Support frame 3 is fixed to the top inner wall of housing 1. Welding equipment body 2 is mounted on support frame 3. Support frame 3 is provided with a moving component for driving the movement of welding equipment body 2.

[0030] Box 12 is fixed to the bottom inner wall of shell 1. Box 12 is provided with an adaptation component for adapting the moving component and the main body 2 of the welding equipment to the curvature of the wind turbine tower surface.

[0031] In use, the shell 1 is hoisted by the steel rope at the top of the wind turbine tower and transported to the position where welding is required. First, the adapting component is used to make the moving component adapt to the surface curvature of the wind turbine tower. Then, the moving component drives the main body 2 of the welding equipment to move, so that the main body 2 of the welding equipment moves along the curve that adapts to the surface curvature of the wind turbine tower on the moving component, so that the welding path adapts to the surface curvature of the wind turbine tower.

[0032] Reference Figure 2 , Figure 3 and Figure 4The moving assembly comprises a mounting plate 4 slidably connected to the support frame 3, the welding equipment body 2 is mounted on the mounting plate 4, a first motor 5 is fixedly connected to the mounting plate 4, a first gear 6 is fixedly connected to an output shaft of the first motor 5, a straight rack 9 is arranged on one side of the first gear 6 and engaged with the first gear 6, a T-shaped sliding groove 10 is formed in the top of the straight rack 9, an L-shaped block 7 is fixedly connected to the mounting plate 4, a T-shaped sliding block 8 is fixedly connected to one end of the L-shaped block 7 and slidably connected to the T-shaped sliding groove 10; when the welding equipment body 2 needs to be moved for welding, the first motor 5 is started, the first motor 5 drives the first gear 6 to rotate, the first gear 6 moves on the straight rack 9, thereby driving the mounting plate 4 and the welding equipment body 2 to move along the straight rack 9, and the mounting plate 4 drives the T-shaped sliding block 8 to slide in the T-shaped sliding groove 10 through the L-shaped block 7.

[0033] With reference to Figure 2 and Figure 3 The adapting assembly comprises a cavity 13 filled with liquid formed in the box body 12, a first electric push rod 11 is fixedly connected to the inner wall of the bottom of the shell 1, the sidewall of the box body 12 is fixedly connected to the output end of the first electric push rod 11, a plurality of rectangular openings 14 communicating with the cavity 13 are formed in the box body 12, a moving frame 15 is slidably connected in each of the rectangular openings 14, a contact column 16 is fixedly connected to one end of the moving frame 15, a plurality of the contact columns 16 are in the same plane, the straight rack 9 is fixedly connected to the top of the plurality of moving frames 15, and the straight rack 9 and the T-shaped sliding block 8 are both made of elastic material; when the moving assembly needs to adapt to the surface arc of the wind power tower drum, after the shell 1 is hoisted to the welding position, the first electric push rod 11 is started, the first electric push rod 11 drives the box body 12 to move, the box body 12 drives the moving frame 15 and the contact column 16 to move, so that the plurality of contact columns 16 move towards the surface of the wind power tower drum, the wind power tower drum can compress the contact column 16 and press it into the rectangular opening 14 of the box body 12, since the plurality of rectangular openings 14 are communicated through the cavity 13, the plurality of contact columns 16 are pressed into the rectangular openings 14 at different distances, so that the plurality of contact columns 16 present a curve, which is the arc curve of the surface of the wind power tower drum, and the contact column 16 drives the moving frame 15 to move, since the straight rack 9 and the T-shaped sliding block 8 are both made of elastic material, the movement of the moving frame 15 can make the straight rack 9 deform and bend, and the straight rack 9 adapts to the surface arc of the wind power tower drum.

[0034] With reference to Figure 2 , Figure 3 and Figure 5The box 12 is fixedly connected with a vacuum suction device 17, a flexible hose 18 is installed on the vacuum suction device 17, one end of the flexible hose 18 is fixedly connected with a first connecting pipe 19 with elasticity, both ends of the first connecting pipe 19 are rotatably connected with a rotating cylinder 20, and a vacuum chuck 21 is installed at one end of the rotating cylinder 20; before welding of the welding equipment main body 2, the shell 1 needs to be fixed, two vacuum chucks 21 are in contact with the surface of the wind power tower cylinder, the vacuum suction device 17 is started, and the vacuum suction device 17 is adsorbed on the surface of the wind power tower cylinder through the flexible hose 18, the first connecting pipe 19, the rotating cylinder 20 and the vacuum chuck 21, so that the shell 1 is fixed on the surface of the wind power tower cylinder, and displacement and shaking in the welding process are prevented.

[0035] With reference to Figure 1 , Figure 3 and Figure 5 , the bottom inner wall of the shell 1 is fixedly connected with a second electric push rod 22 through a fixed plate, the output end of the second electric push rod 22 is fixedly connected with a moving block 23, one end of the moving block 23 is fixedly connected with a pressing cambered surface 24, the bottom inner wall of the shell 1 is slidably connected with two moving plates 25, one end of each moving plate 25 is rotatably connected to the outer wall of the rotating cylinder 20, the other end of each moving plate 25 is fixedly connected with a semicircular block 26, the pressing cambered surface 24 is opposite to the semicircular block 26, and elastic ropes 27 are fixedly connected between the moving plates 25 and the inner wall of the shell 1. Fixed blocks 28 are arranged on the shell 1, and circular holes matched with steel ropes are formed in the fixed blocks 28; when the welding path needs to be inclined, the inclination of the shell 1 needs to be adjusted, the second electric push rod 22 is started, the second electric push rod 22 drives the moving block 23 to move, the moving block 23 presses one of the semicircular blocks 26 through the pressing cambered surface 24, the semicircular block 26 drives the moving plate 25 to move, the elastic rope 27 is stretched, the moving plate 25 drives the one of the vacuum chucks 21 to move to the surface of the wind power tower cylinder until contact, and the one of the vacuum chucks 21 is adsorbed on the surface of the wind power tower cylinder through the vacuum suction device 17. The shell 1 is hung through the circular holes in the fixed blocks 28 by the steel ropes, the shell 1 can be driven to move in the vertical direction by winding and unwinding the steel ropes, when the one of the vacuum chucks 21 is adsorbed on the surface of the wind power tower cylinder, that is, one end of the shell 1 is on the wind power tower cylinder, the shell 1 can be driven to rotate around the vacuum chuck 21 by winding and unwinding the steel ropes, so that the welding path of the welding equipment main body 2 is inclined, when the inclination is adjusted to be appropriate, the moving block 23 is continuously driven to move by the second electric push rod 22, the moving block 23 moves the other semicircular block 26 through the pressing cambered surface 24, and the other vacuum chuck 21 is also adsorbed on the surface of the wind power tower cylinder, so that the shell 1 is fixed.

[0036] With reference to Figure 1 and Figure 2The upper portion of the shell 1 is provided with a box body 29, the fixing block 28 is fixedly connected to the top of the box body 29, a second motor 30 is fixedly connected in the box body 29, the output shaft of the second motor 30 is fixedly connected with a second gear 31, an L-shaped plate 32 is fixedly connected to the outer wall of the shell 1, the box body 29 is slidingly connected to the L-shaped plate 32, an L-shaped rack 33 is fixedly connected to the L-shaped plate 32, and the L-shaped rack 33 is engaged with the second gear 31; when it is necessary to make the equipment process the vertical crack, the second motor 30 is started, the second motor 30 drives the second gear 31 to rotate, the second gear 31 walks on the L-shaped rack 33, so that the box body 29 walks on the surface of the shell 1, when the box body 29 walks to the end of the L-shaped rack 33, the shell 1 is in a vertical state, and the welding path of the welding equipment main body 2 is also vertical, so that the vertical crack can be welded.

[0037] With reference to Figure 6 The moving frame 15 is fixedly connected with an air outlet device 34, air outlet channels 36 are formed in the contact columns 16, a second connecting pipe 35 is installed on the air outlet device 34, one end of the second connecting pipe 35 is communicated with one of the air outlet channels 36, and adjacent two air outlet channels 36 are communicated through a connecting pipe 37; before the contact columns 16 adapt to the surface curvature of the wind power tower drum, the air outlet device 34 is started, air is blown out from the multiple air outlet channels 36 through the second connecting pipe 35 and the connecting pipe 37, dust and impurities on the position to be welded can be blown away, and the welding quality is prevented from being affected.

[0038] With reference to Figure 7 An installation groove 38 is formed in the side wall of the contact column 16, a cleaning brush 39 is fixedly connected in the installation groove 38, a plurality of air outlet holes 40 are formed in the contact column 16, and the air outlet channels 36 are communicated with the installation groove 38 through the air outlet holes 40; before the contact columns 16 adapt to the surface curvature of the wind power tower drum, the contact columns 16 sweep the position to be welded, the cleaning brush 39 can clean the position to be welded, dust and impurities are swept away, and in the air outlet process of the air outlet channels 36, air is blown to the cleaning brush 39 through the air outlet holes 40, and dust and impurities interposed between the cleaning brushes 39 are blown away.

[0039] Working principle: in use, the shell 1 is hoisted through the steel rope at the top of the wind power tower drum, the shell 1 is hoisted and transported to the position to be welded, the moving assembly is adapted to the surface curvature of the wind power tower drum through the adapting assembly, the welding equipment main body 2 is driven to move through the moving assembly, the welding equipment main body 2 moves on the moving assembly along the curve adapted to the surface curvature of the wind power tower drum, and the path of welding is adapted to the surface curvature of the wind power tower drum.

[0040] When the welding device body 2 needs to be moved for welding, the first motor 5 is started, the first motor 5 drives the first gear 6 to rotate, the first gear 6 walks on the straight rack 9, thereby driving the mounting plate 4 and the welding device body 2 to move along the straight rack 9, the mounting plate 4 drives the T-shaped sliding block 8 to slide in the T-shaped sliding groove 10 through the L-shaped block 7;

[0041] When the mobile assembly needs to adapt to the arc of the surface of the wind power tower drum, after the shell 1 is hoisted to the welding position, the first electric push rod 11 is started, the first electric push rod 11 drives the box body 12 to move, the box body 12 drives the moving frame 15 and the contact column 16 to move, so that the plurality of contact columns 16 move towards the surface of the wind power tower drum, the wind power tower drum can compress the contact column 16 and press it into the rectangular port 14 of the box body 12, since the plurality of rectangular ports 14 are communicated through the cavity 13, the plurality of contact columns 16 are pressed into the rectangular port 14 at different distances, so that the plurality of contact columns 16 present a curve, which is the arc curve of the surface of the wind power tower drum, the contact column 16 drives the moving frame 15 to move, since the straight rack 9 and the T-shaped sliding block 8 are both elastic materials, the movement of the moving frame 15 can make the straight rack 9 deform and bend, so that the straight rack 9 adapts to the surface arc of the wind power tower drum;

[0042] Before the welding device body 2 is welded, the shell 1 needs to be fixed, so that the two vacuum suction cups 21 are in contact with the surface of the wind power tower drum, the vacuum suction device 17 is turned on, the vacuum suction device 17 is adsorbed on the surface of the wind power tower drum through the hose 18, the first connecting pipe 19, the rotating cylinder 20 and the vacuum suction cup 21, so as to fix the shell 1 on the surface of the wind power tower drum, preventing displacement and shaking during the welding process;

[0043] When the welding path needs to be inclined, the inclination of the shell 1 needs to be adjusted, the second electric push rod 22 is started, the second electric push rod 22 drives the moving block 23 to move, the moving block 23 extrudes one of the semicircular blocks 26 through the extrusion arc surface 24, the semicircular block 26 drives the moving plate 25 to move, the elastic rope 27 is stretched, the moving plate 25 drives one of the vacuum suction cups 21 to move towards the surface of the wind power tower drum until it is in contact, the vacuum suction cup 21 is adsorbed on the surface of the wind power tower drum through the vacuum suction device 17, the steel rope is used to hoist the shell 1 through the round hole of the fixing block 28, the shell 1 can be moved in the vertical direction by winding and unwinding the steel rope, when one of the vacuum suction cups 21 is adsorbed on the surface of the wind power tower drum, i.e. one end of the shell 1 is on the wind power tower drum, the shell 1 can be rotated around the vacuum suction cup 21 by winding and unwinding the steel rope, so that the welding path of the welding device body 2 is inclined, when the inclination is adjusted to the right position, the second electric push rod 22 is continuously pushed to move the moving block 23, so that the moving block 23 extrudes the other semicircular block 26 through the extrusion arc surface 24, so that the other vacuum suction cup 21 is also adsorbed on the surface of the wind power tower drum, realizing the fixation of the shell 1;

[0044] When the device needs to process the vertical crack, the second motor 30 is started, the second motor 30 drives the second gear 31 to rotate, the second gear 31 walks on the L-shaped rack 33, thereby driving the box body 29 to walk on the surface of the shell 1, when the box body 29 walks to the end of the L-shaped rack 33, the shell 1 is in a vertical state, and the welding path of the welding device main body 2 is also vertical, that is, the vertical crack can be welded;

[0045] Before the contact column 16 adapts to the surface arc of the wind power tower drum, the air outlet device 34 is started, the air outlet device 34 blows air out from a plurality of air outlet channels 36 through the second connecting pipe 35 and the connecting pipe 37, the wind can blow off the dust and impurities on the position to be welded, and prevent the welding quality from being affected;

[0046] Before the contact column 16 adapts to the surface arc of the wind power tower drum, the contact column 16 sweeps the position to be welded, the cleaning brush 39 can clean the position to be welded, and the dust and impurities are swept away, in the air outlet process of the air outlet channel 36, the wind blows on the cleaning brush 39 through the air outlet hole 40, and the dust and impurities interposed between the cleaning brush 39 are blown away.

[0047] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0048] Finally: the above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A welding apparatus for a wind turbine tower, comprising a housing (1) and a welding apparatus body (2) which is arranged in the housing (1), characterized in that Also include: Support frame (3), support frame (3) is connected in the top inner wall of the shell (1), the welding equipment body (2) is arranged on the support frame (3), the support frame (3) is provided with moving assembly for driving the welding equipment body (2) to move; Box (12), box (12) is connected in the bottom inner wall of the shell (1), box (12) is provided with the adaptation assembly for making the moving assembly and the welding equipment body (2) adapt to the surface arc of the wind power tower drum; The moving assembly includes the mounting plate (4) slidably connected on the support frame (3), the welding equipment body (2) is installed on the mounting plate (4), the first motor (5) is fixedly connected on the mounting plate (4), the output shaft of the first motor (5) is fixedly connected with the first gear (6), one side of the first gear (6) is provided with a straight rack (9) engaged with the first gear (6), a T-shaped sliding groove (10) is formed in the top of the straight rack (9), the L-shaped block (7) is fixedly connected on the mounting plate (4), one end of the L-shaped block (7) is fixedly connected with the T-shaped sliding block (8), the T-shaped sliding block (8) is slidably connected in the T-shaped sliding groove (10); The adaptation assembly includes a cavity (13) formed in the box (12) and filled with liquid, the bottom inner wall of the shell (1) is fixedly connected with the first electric push rod (11), the sidewall of the box (12) is fixedly connected with the output end of the first electric push rod (11), a plurality of rectangular openings (14) are formed in the box (12) and communicated with the cavity (13), the moving frame (15) is slidably connected in the rectangular opening (14), the contact column (16) is fixedly connected at one end of the moving frame (15), a plurality of the contact columns (16) are in the same plane, the straight rack (9) is fixedly connected at the top of the plurality of moving frames (15), and the straight rack (9) and the T-shaped sliding block (8) are both made of elastic material.

2. The welding apparatus for windmill towers of claim 1, wherein, The box (12) is fixedly connected with the vacuum suction equipment (17), the extendable hose (18) is installed on the vacuum suction equipment (17), one end of the hose (18) is fixedly connected with the first connecting pipe (19), the both ends of the first connecting pipe (19) are rotatably connected with the rotating cylinder (20), and the vacuum chuck (21) is installed at one end of the rotating cylinder (20).

3. The welding apparatus for windmill towers of claim 2, wherein, The bottom inner wall of the shell (1) is fixedly connected with the second electric push rod (22) through the fixed plate, the output end of the second electric push rod (22) is fixedly connected with the moving block (23), one end of the moving block (23) is fixedly connected with the extrusion arc surface (24), the bottom inner wall of the shell (1) is slidably connected with two moving plates (25), one end of the moving plate (25) is rotatably connected with the outer wall of the rotating cylinder (20), the other end of the moving plate (25) is fixedly connected with the semicircular block (26), the extrusion arc surface (24) is opposite to the semicircular block (26), the elastic rope (27) is fixedly connected between the moving plate (25) and the inner wall of the shell (1), the fixed block (28) is arranged on the shell (1), and a circular hole is formed in the fixed block (28).

4. The welding apparatus for windmill towers of claim 3, wherein, The upper portion of the shell (1) is provided with a box body (29), the fixed block (28) is fixedly connected to the top of the box body (29), a second motor (30) is fixedly connected in the box body (29), the output shaft of the second motor (30) is fixedly connected with a second gear (31), the outer wall of the shell (1) is fixedly connected with an L-shaped plate (32), the box body (29) is slidingly connected to the L-shaped plate (32), the L-shaped plate (32) is fixedly connected with an L-shaped rack (33), and the L-shaped rack (33) is engaged with the second gear (31).

5. The welding apparatus for windmill towers of claim 4, wherein, The moving frame (15) is fixedly connected with an air outlet device (34), air outlet channels (36) are formed in the contact columns (16), a second connecting pipe (35) is installed on the air outlet device (34), one end of the second connecting pipe (35) is communicated with one air outlet channel (36), and adjacent two air outlet channels (36) are communicated through a connecting pipe (37).

6. The welding apparatus for windmill towers of claim 5, wherein, A mounting groove (38) is formed in the side wall of the contact column (16), a cleaning brush (39) is fixedly connected in the mounting groove (38), a plurality of air outlet holes (40) are formed in the contact column (16), and the air outlet channel (36) is communicated with the mounting groove (38) through the air outlet hole (40).

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