Tower type pressure vessel welding device

Abstract

The invention relates to the technical field of welding devices, and discloses a tower type pressure vessel welding device which comprises a welding machine body, a mounting rod is fixedly connected to one side of the welding machine body, a rotating sleeve is rotatably connected to the end, away from the welding machine body, of the mounting rod, and a rotating motor is fixedly connected to the top of the end, away from the welding machine body, of the mounting rod. A gear is fixedly connected to the output end of the rotating motor, a plurality of tooth blocks meshed with the gear are fixedly connected to the outer wall of the rotating sleeve, an inner side welding gun head is fixedly connected to the bottom of the rotating sleeve, a positioning assembly is connected to the end, away from the mounting rod, of the rotating sleeve, and an outer side frame is fixedly connected to the top of the mounting rod. According to the tower type pressure container welding device, when a circular seam is welded, welding can be conducted by rotating the inner side welding gun head and the outer side welding gun head, so that the hidden double risks of structural stability and personnel safety in the workpiece rotating process can be avoided, and the safety in the welding process is higher.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, in particular to a tower pressure vessel welding device. Background Art

[0002] Tower pressure vessels are large cylindrical structures specially designed to withstand internal or external pressures. They are usually used in industries such as petroleum, chemical, natural gas, and nuclear power. They are named after their tower-like shape. In the manufacturing process of tower pressure vessels, welding is undoubtedly the most critical link. A variety of welding technologies and equipment are used to ensure their quality. Among these many welding equipment, the most commonly used is the automatic submerged arc welding machine.

[0003] For example, the patent with the patent authorization announcement number CN215698750U discloses an automatic submerged arc welding machine, including a slide rail, a mobile seat is arranged above the slide rail, an electric telescopic rod is fixed to the bottom of the mobile seat, a lifting plate is fixed to the telescopic end of the electric telescopic rod, a fixed box is fixed to the top of the lifting plate, the inner bottom wall of the fixed box is rotatably connected with a rotating column, and the top of the rotating column passes through the top of the fixed box and is fixed with a fixed rod. The automatic submerged arc welding machine, by setting a lower semicircular ring, a lower cleaning layer, an upper semicircular ring and an upper cleaning layer, can achieve the purpose of cleaning the welding wire to avoid affecting the working quality of the automatic submerged arc welding machine, and by setting a rotating column, a first bevel gear, a driving motor, a second bevel gear, a rotating rod and a third bevel gear, two ways of adjusting the installation angle of the welding gun head, electric and manual, are provided, and the operation steps are simple, so as to facilitate the adjustment of the installation angle of the welding gun head.

[0004] The automatic submerged arc welding machine in the above patent still has certain defects: The current tower pressure vessels, when using automatic submerged arc welding machines for circumferential welding operations, often rely on auxiliary equipment such as roller frames to rotate the workpiece. Although this approach simplifies the welding process, due to the large size and amazing weight of the tower pressure vessel, the rotation process poses a dual risk of structural stability and personnel safety. If the method of rotating the workpiece is abandoned in order to avoid these risks and improve the stability and safety of the welding operation, the automatic submerged arc welding machine will find it difficult to ensure the accuracy of the welding path, which will lead to a decrease in work efficiency. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a tower pressure vessel welding device, which enables the welding machine body to accurately weld the annular seam even without rotating the workpiece during welding.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a tower pressure vessel welding device, comprising a welding machine body, one side of the welding machine body is fixedly connected to a mounting rod, an end of the mounting rod away from the welding machine body is rotatably connected to a rotating sleeve, the top of the mounting rod away from the welding machine body is fixedly connected to a rotating motor, the output end of the rotating motor is fixedly connected to a gear, the outer wall of the rotating sleeve is fixedly connected to a plurality of tooth blocks meshing with the gear, the bottom of the rotating sleeve is fixedly connected to an inner welding gun head, the end of the rotating sleeve away from the mounting rod is connected to a positioning assembly, the top of the mounting rod is fixedly connected to an outer frame, the end of the outer frame away from the welding machine body is installed with a walking assembly, the outer welding gun head is slidably connected to the walking assembly, and a support frame is provided on one side of the welding machine body, and the inner side of the support frame is fixedly connected to a lower end connecting rail matching the outer frame.

[0007] Furthermore, the walking assembly includes a moving frame, a walking motor and a walking roller, an upper guide rail groove is opened on the outer frame, a lower guide rail groove is opened on the lower connecting rail, the walking roller matches the lower guide rail groove and the upper guide rail groove, the walking roller is rotatably connected to the moving frame, the walking motor is fixedly connected to the moving frame, and the output end of the walking motor passes through the moving frame and is fixedly connected to one of the walking rollers.

[0008] Furthermore, one end of the outer welding gun head away from the mounting rod is fixedly connected to a connecting block, one side of the connecting block is fixedly connected to a sliding block, the outer wall of the movable frame is provided with a sliding groove matching the sliding block, and one end of the movable frame away from the outer welding gun head is threadedly connected to a threaded rod, and the threaded rod is rotatably connected to the connecting block.

[0009] Furthermore, the outer frame and the lower connecting rail are fixedly connected to a plurality of equally spaced stoppers on one side away from the mounting rod, the movable frame is fixedly connected to a guide block on one side close to the stoppers, and a guide groove is formed at one end of the guide block away from the movable frame.

[0010] Furthermore, the positioning assembly includes a limit plate, a positioning frame, a positioning roller, a pushing cylinder and an extrusion block. The outer wall of the rotating sleeve is fixedly connected to a plurality of equidistant limit plates, one side of each limit plate is slidably connected to a positioning frame, the end of the positioning frame away from the rotating sleeve is rotatably connected to the positioning roller, the interior of the mounting rod is fixedly connected to a pushing cylinder, the output end of the pushing cylinder is fixedly connected to an extrusion block matching the positioning frame, and the extrusion block is slidably connected to the rotating sleeve.

[0011] Furthermore, a limiting groove is provided on one side of the limiting plate close to the positioning frame, the inside of the limiting groove is slidably connected with a limiting block fixed to the positioning frame, the middle of the limiting block is slidably connected with a limiting column fixed to the limiting plate, the lower end of the limiting column is sleeved with a reset elastic member, the top of the reset elastic member is fixedly connected to the bottom of the limiting block, and the bottom of the reset elastic member is fixedly connected to the bottom of the limiting groove.

[0012] Furthermore, a connecting plate is fixedly connected to the bottom of the rotating sleeve at one end away from the mounting rod, a connecting frame is slidably connected to the side of the connecting plate away from the mounting rod, a scraping block is fixedly connected to the bottom of the connecting frame, two symmetrically arranged wiping blocks are fixedly connected to the side of the scraping block close to the inner welding gun head, the two wiping blocks are respectively located on both sides of the inner welding gun head, and a wiping strip is fixedly connected to the end of the scraping block and the wiping block away from the rotating sleeve.

[0013] Furthermore, a wedge block is fixedly connected to one end of the extrusion block away from the pushing cylinder, and the wedge block matches the connecting frame. An anti-drop block is fixedly connected to one side of the connecting frame. An anti-drop groove matching the anti-drop block is provided on one side of the connecting plate. An anti-drop rod is slidably connected to the middle position of the anti-drop block. The anti-drop rod is fixed to the connecting plate. A pull-up elastic piece is sleeved on the upper end of the anti-drop rod. The lower end of the pull-up elastic piece is fixed to the anti-drop block. The upper end of the pull-up elastic piece is fixed to the top of the anti-drop groove. A storage groove matching the top of the connecting frame is provided at the bottom of the extrusion block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When welding a workpiece, the tower pressure vessel welding device only needs to place the workpiece on the external roller frame, then place the support frame under the weld, and then move the welding machine body to align the inner and outer welding gun heads with the weld. Finally, start the equipment, and the inner and outer welding gun heads will rotate with the mounting rod as the axis to complete the welding of the weld. In this way, the potential risks of structural stability and personnel safety during the rotation of the workpiece can be avoided, making the welding process safer. 2. This tower pressure vessel welding device can start the push cylinder after the inner welding gun head is aligned with the weld, and drive the extrusion block to move by the push cylinder, and push the positioning frame toward the inner wall of the workpiece by the extrusion block until the positioning roller abuts against the inner wall of the workpiece, which can not only improve the stability of the inner welding gun head, but also make it difficult for two adjacent workpieces to move relative to each other; 3. After the welding work is completed, the tower pressure vessel welding device can push the extrusion block a distance away from the mounting rod by pushing the cylinder, so that the positioning frame is free from restriction, so that the positioning frame can return to its original position under the pull of the reset elastic member. At this time, the wedge block is not separated from the connecting frame, so the scraping block and the wiping strip on the wiping block will still be in close contact with the inner wall of the workpiece. Then the welding machine body is moved to the outside of the workpiece. At this time, the wiping strip will wipe the bottom of the workpiece, thereby taking the welding slag generated during welding out of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the support frame of the present invention; Figure 3 It is a structural schematic diagram of the welding machine body of the present invention; Figure 4 It is a schematic diagram of the connection structure between the outer frame and the mobile frame of the present invention; Figure 5 It is a structural schematic diagram of the mobile frame of the present invention; Figure 6 It is a schematic diagram of the connection structure between the mounting rod and the rotating sleeve of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the mounting rod and the rotating sleeve of the present invention when viewed from the left; Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at point A in the middle; Fig. 9 For the present invention Figure 7 A schematic diagram of the local enlarged structure at B in the middle; Fig.10 A partial cross-sectional view of a mounting rod of the present invention; Fig.11 A cross-sectional view of the mounting rod and the rotating sleeve of the present invention; Fig.12 It is a schematic structural diagram of the extrusion block of the present invention.

[0016] In the figure: 1. welding machine body; 2. mounting rod; 3. outer frame; 4. support frame; 5. lower connecting rail; 6. lower guide groove; 7. stopper; 8. upper guide groove; 9. moving frame; 10. travel motor; 11. travel roller; 12. outer welding gun head; 13. connecting block; 14. slider; 15. slide groove; 16. threaded rod; 17. guide block; 18. guide groove; 19. rotating motor; 20. gear; 21. rotating sleeve; 22. gear block; 2 3. Inner welding gun head; 24. Limiting plate; 25. Positioning frame; 26. Positioning roller; 27. Limiting block; 28. Limiting groove; 29. ​​Limiting column; 30. Reset elastic member; 31. Pushing cylinder; 32. Extrusion block; 33. Wedge block; 34. Storage groove; 35. Connecting frame; 36. Scraping block; 37. Wiping block; 38. Wiping strip; 39. Anti-slip block; 40. Connecting plate; 41. Anti-slip groove; 42. Anti-slip rod; 43. Pull-up elastic member; 44. Workpiece. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] See also Figures 1 to 12 A tower pressure vessel welding device comprises a welding machine body 1, a mounting rod 2 is fixedly connected to one side of the welding machine body 1, a rotating sleeve 21 is rotatably connected to one end of the mounting rod 2 away from the welding machine body 1, a rotating motor 19 is fixedly connected to the top of the end of the mounting rod 2 away from the welding machine body 1, a gear 20 is fixedly connected to the output end of the rotating motor 19, a plurality of tooth blocks 22 meshing with the gear 20 are fixedly connected to the outer wall of the rotating sleeve 21, an inner welding gun head 23 is fixedly connected to the bottom of the rotating sleeve 21, a positioning assembly is connected to the end of the rotating sleeve 21 away from the mounting rod 2, an outer frame 3 is fixedly connected to the top of the mounting rod 2, a walking assembly is installed at one end of the outer frame 3 away from the welding machine body 1, an outer welding gun head 12 is slidably connected to the walking assembly, a support frame 4 is provided on one side of the welding machine body 1, and a lower end connecting rail 5 matching the outer frame 3 is fixedly connected to the inner side of the support frame 4.

[0019] The tower pressure vessel welding device of the present invention, when welding the workpiece 44, firstly places the workpiece 44 on the external roller frame, then places the support frame 4 under the weld between the two workpieces 44, then moves the welding machine body 1, aligns the inner welding gun head 23 and the outer welding gun head 12 with the weld, and finally starts the rotating motor 19, the rotating motor 19 drives the gear 20 to rotate, and the gear 20 drives the gear block 22 to rotate, and then the gear block 22 drives the rotating sleeve 21 to rotate, because the inner welding gun head 23 is fixed to the rotating sleeve 21, therefore, the inner welding gun head 23 rotates with the rotating sleeve 21, so as to weld the inner side of the weld, because the outer welding gun head 12 is installed on the walking assembly, and the walking assembly moves along the outer frame 3 and the lower end connecting rail 5, so the outer The side welding gun head 12 will move along the direction of the outer frame 3 and the lower connecting rail 5, and then weld the outside of the weld. This can avoid the dual risks of structural stability and personnel safety hidden in the rotation of the workpiece 44, making the welding process safer. At the same time, after welding is completed, starting the rotating motor 19 to rotate in the reverse direction can return the inner welding gun head 23 to its original position, and the walking component can move in the reverse direction to return the outer welding gun head 12 to its original position. This can prevent the cable connecting the inner welding gun head 23 and the outer welding gun head 12 from being entangled in the mounting rod 2 or the outer frame 3, causing the cable to be broken. In addition, the structure of the welding machine body 1 in the present invention is similar to the structure of an automatic submerged arc welding machine disclosed in the patent with patent authorization announcement number CN215698750U, so it will not be elaborated here.

[0020] As a preferred technical solution of the present invention, the walking component includes a moving frame 9, a walking motor 10 and a walking roller 11. An upper guide rail groove 8 is opened on the outer frame 3, and a lower guide rail groove 6 is opened on the lower connecting rail 5. The walking roller 11 matches the lower guide rail groove 6 and the upper guide rail groove 8. The walking roller 11 is rotatably connected to the moving frame 9, the walking motor 10 is fixedly connected to the moving frame 9, and the output end of the walking motor 10 passes through the moving frame 9 and is fixedly connected to one of the walking rollers 11.

[0021] Specifically, when the outer welding gun head 12 needs to move to weld the outside of the weld, it is only necessary to start the travel motor 10, and the travel motor 10 drives the travel roller 11 to rotate, and the travel roller 11 will move the moving frame 9 along the upper guide groove 8 and the lower guide groove 6. Since the outer welding gun head 12 is installed on the travel assembly, the outer welding gun head 12 can weld the outside of the weld.

[0022] As a preferred technical solution of the present invention, one end of the outer welding gun head 12 away from the mounting rod 2 is fixedly connected to a connecting block 13, one side of the connecting block 13 is fixedly connected to a slider 14, the outer wall of the movable frame 9 is provided with a slide groove 15 matching the slider 14, and the end of the movable frame 9 away from the outer welding gun head 12 is threadedly connected to a threaded rod 16, and the threaded rod 16 is rotatably connected to the connecting block 13.

[0023] Specifically, when it is necessary to adjust the distance between the weld on the workpiece 44 and the outer welding gun head 12, it is only necessary to rotate the threaded rod 16. Since the outer welding gun head 12 is fixedly connected to the connecting block 13, when the threaded rod 16 is rotated, the threaded rod 16 will drive the connecting block 13 to move, thereby changing the position of the outer welding gun head 12, and then increasing or decreasing the distance between the outer welding gun head 12 and the weld.

[0024] As a preferred technical solution of the present invention, a plurality of equally spaced stoppers 7 are fixedly connected to the outer frame 3 and the lower connecting rail 5 on the side away from the mounting rod 2, a guide block 17 is fixedly connected to the side of the movable frame 9 close to the stopper 7, and a guide groove 18 is provided at the end of the guide block 17 away from the movable frame 9.

[0025] Specifically, the cable connected to the outer welding gun head 12 and the travel motor 10 will be stuck in the guide groove 18 on the guide block 17. During the movement of the travel assembly, the cable will be pulled and moved by the guide block 17, and then the cable will be wound around the outer frame 3 and the outside of the lower connecting rail 5 to prevent the cable from being stuck in the lower guide groove 6 or the upper guide groove 8, causing the cable to be stuck.

[0026] As a preferred technical solution of the present invention, the positioning assembly includes a limit plate 24, a positioning frame 25, a positioning roller 26, a pushing cylinder 31 and an extrusion block 32. The outer wall of the rotating sleeve 21 is fixedly connected with a plurality of equally spaced limit plates 24, and one side of each limit plate 24 is slidably connected with a positioning frame 25. The end of the positioning frame 25 away from the rotating sleeve 21 is rotatably connected with the positioning roller 26. The interior of the mounting rod 2 is fixedly connected with a pushing cylinder 31, and the output end of the pushing cylinder 31 is fixedly connected with an extrusion block 32 matching the positioning frame 25, and the extrusion block 32 is slidably connected with the rotating sleeve 21.

[0027] As a preferred technical solution of the present invention, a limiting groove 28 is opened on one side of the limiting plate 24 close to the positioning frame 25, and the inner part of the limiting groove 28 is slidably connected with a limiting block 27 fixed to the positioning frame 25, and the middle of the limiting block 27 is slidably connected with a limiting column 29 fixed to the limiting plate 24, and the lower end of the limiting column 29 is sleeved with a reset elastic member 30, the top of the reset elastic member 30 is fixed to the bottom of the limiting block 27, and the bottom of the reset elastic member 30 is fixed to the bottom of the limiting groove 28.

[0028] Specifically, when it is necessary to reinforce the end of the mounting rod 2 away from the welding machine body 1, the pushing cylinder 31 can be started, and the pushing cylinder 31 can drive the extrusion block 32 to move in the direction of the mounting rod 2. Under the extrusion of the extrusion block 32, the positioning frame 25 will move in the direction away from the rotating sleeve 21 until the positioning roller 26 on the positioning frame 25 abuts against the inner wall of the workpiece 44. This can not only provide additional support for the mounting rod 2 and the rotating sleeve 21, but also reduce the probability of displacement of the workpiece 44 during the welding process. After the welding is completed, it is only necessary to start the pushing cylinder 31 to move the extrusion block 32 in the direction away from the mounting rod 2, so that the positioning frame 25 loses its restriction. After the positioning frame 25 loses its restriction, the reset elastic member 30 will push the limit block 27 to move to its original position, and the limit block 27 will drive the positioning frame 25 back to its original position, so that the positioning component can be removed from the workpiece 44.

[0029] As a preferred technical solution of the present invention, a connecting plate 40 is fixedly connected to the bottom of the rotating sleeve 21 away from the mounting rod 2, and a connecting frame 35 is slidably connected to the side of the connecting plate 40 away from the mounting rod 2. A scraping block 36 is fixedly connected to the bottom of the connecting frame 35, and two symmetrically arranged wiping blocks 37 are fixedly connected to the side of the scraping block 36 close to the inner welding gun head 23. The two wiping blocks 37 are respectively located on both sides of the inner welding gun head 23, and a wiping strip 38 is fixedly connected to the end of the scraping block 36 and the wiping block 37 away from the rotating sleeve 21.

[0030] Specifically, when the extrusion block 32 moves toward the mounting rod 2, the wedge block 33 will also squeeze the connecting frame 35, so that the scraping block 36 and the wiping strip 38 on the wiping block 37 are in close contact with the inner wall of the workpiece 44. In this way, during the welding process of the inner welding gun head 23 (because the inner welding gun head 23 is fixed on the rotating sleeve 21, the rotating sleeve 21 needs to be rotated when the inner welding gun head 23 is welded), the rotating sleeve 21 will drive the scraping block 36 and the wiping block 37 to move synchronously, thereby wiping the unwelded and welded welds, which can not only achieve the purpose of cleaning the welds, but also clean the welding slag generated during welding.

[0031] As a preferred technical solution of the present invention, a wedge block 33 is fixedly connected to one end of the extrusion block 32 away from the pushing cylinder 31, and the wedge block 33 matches the connecting frame 35. An anti-slip block 39 is fixedly connected to one side of the connecting frame 35. An anti-slip groove 41 matching the anti-slip block 39 is provided on one side of the connecting plate 40. An anti-slip rod 42 is slidably connected to the middle position of the anti-slip block 39. The anti-slip rod 42 is fixedly connected to the connecting plate 40. The upper end of the anti-slip rod 42 is sleeved with a pull-up elastic member 43. The lower end of the pull-up elastic member 43 is fixedly connected to the anti-slip block 39, and the upper end of the pull-up elastic member 43 is fixedly connected to the top of the anti-slip groove 41. A storage groove 34 matching the top of the connecting frame 35 is provided at the bottom of the extrusion block 32.

[0032] Specifically, after welding is completed, the extrusion block 32 can be pushed a distance away from the mounting rod 2 by the pushing cylinder 31, so that the positioning frame 25 loses its restriction, so that the positioning frame 25 can return to its original position under the pull of the reset elastic member 30, and at this time the wedge block 33 is not separated from the connecting frame 35, so the scraping block 36 and the wiping strip 38 on the wiping block 37 will still be in close contact with the inner wall of the workpiece 44, and then the welding machine body 1 is moved toward the outside of the workpiece 44, at this time the wiping strip 38 will wipe the lower part of the inner wall of the workpiece 44, thereby bringing the welding slag generated during welding out of the workpiece 44, and after the entire equipment is completely moved out of the workpiece 44, the pushing cylinder 31 can be started here, and the extrusion block 32 can be pushed in the direction away from the mounting rod 2 by the pushing cylinder 31 until the wedge block 33 is separated from the connecting frame 35, and after the connecting frame 35 loses its restriction, the connecting frame 35 will drive the scraping block 36 back to its original position under the pull of the upper pull elastic member 43.

[0033] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A tower pressure vessel welding device, comprising a welding machine body (1), characterized in that: A mounting rod (2) is fixedly connected to one side of the welding machine body (1); an end of the mounting rod (2) away from the welding machine body (1) is rotatably connected to a rotating sleeve (21); a top of an end of the mounting rod (2) away from the welding machine body (1) is fixedly connected to a rotating motor (19); an output end of the rotating motor (19) is fixedly connected to a gear (20); a plurality of tooth blocks (22) meshing with the gear (20) are fixedly connected to the outer wall of the rotating sleeve (21); and a rotating sleeve (21) is fixedly connected to the bottom of the rotating sleeve (21). An inner welding gun head (23), one end of the rotating sleeve (21) away from the mounting rod (2) is connected to a positioning assembly, the top of the mounting rod (2) is fixedly connected to an outer frame (3), one end of the outer frame (3) away from the welding machine body (1) is installed with a walking assembly, the walking assembly is slidably connected to the outer welding gun head (12), a support frame (4) is provided on one side of the welding machine body (1), and a lower end connecting rail (5) matching the outer frame (3) is fixedly connected to the inner side of the support frame (4); The walking assembly comprises a moving frame (9), a walking motor (10) and a walking roller (11); an upper guide rail groove (8) is formed on the outer frame (3); a lower guide rail groove (6) is formed on the lower connecting rail (5); the walking roller (11) matches the lower guide rail groove (6) and the upper guide rail groove (8); the walking roller (11) is rotatably connected to the moving frame (9); the walking motor (10) is fixedly connected to the moving frame (9); and an output end of the walking motor (10) passes through the moving frame (9) and is fixedly connected to one of the walking rollers (11).

2. A tower pressure vessel welding device according to claim 1, characterized in that: One end of the outer welding gun head (12) away from the mounting rod (2) is fixedly connected to a connecting block (13), one side of the connecting block (13) is fixedly connected to a sliding block (14), an outer wall of the movable frame (9) is provided with a sliding groove (15) matching the sliding block (14), and one end of the movable frame (9) away from the outer welding gun head (12) is threadedly connected to a threaded rod (16), and the threaded rod (16) is rotatably connected to the connecting block (13).

3. A tower pressure vessel welding device according to claim 1, characterized in that: A plurality of equally spaced stoppers (7) are fixedly connected to the side of the outer frame (3) and the lower connecting rail (5) away from the mounting rod (2); a guide block (17) is fixedly connected to the side of the movable frame (9) close to the stopper (7); and a guide groove (18) is formed at one end of the guide block (17) away from the movable frame (9).

4. A tower pressure vessel welding device according to claim 1, characterized in that: The positioning assembly comprises a limit plate (24), a positioning frame (25), a positioning roller (26), a pushing cylinder (31) and an extrusion block (32); the outer wall of the rotating sleeve (21) is fixedly connected to a plurality of limit plates (24) which are equidistantly distributed; one side of each limit plate (24) is slidably connected to a positioning frame (25); one end of the positioning frame (25) which is away from the rotating sleeve (21) is rotatably connected to the positioning roller (26); the interior of the mounting rod (2) is fixedly connected to the pushing cylinder (31); the output end of the pushing cylinder (31) is fixedly connected to an extrusion block (32) which matches the positioning frame (25); and the extrusion block (32) is slidably connected to the rotating sleeve (21).

5. A tower pressure vessel welding device according to claim 4, characterized in that: A limiting groove (28) is provided on one side of the limiting plate (24) close to the positioning frame (25); a limiting block (27) fixedly connected to the positioning frame (25) is slidably connected inside the limiting groove (28); a limiting column (29) fixedly connected to the limiting plate (24) is slidably connected in the middle of the limiting block (27); a reset elastic member (30) is sleeved on the lower end of the limiting column (29); the top of the reset elastic member (30) is fixedly connected to the bottom of the limiting block (27); and the bottom of the reset elastic member (30) is fixedly connected to the bottom of the limiting groove (28).

6. A tower pressure vessel welding device according to claim 4, characterized in that: A connecting plate (40) is fixedly connected to the bottom of one end of the rotating sleeve (21) away from the mounting rod (2); a connecting frame (35) is slidably connected to the side of the connecting plate (40) away from the mounting rod (2); a scraping block (36) is fixedly connected to the bottom of the connecting frame (35); two symmetrically arranged wiping blocks (37) are fixedly connected to the side of the scraping block (36) close to the inner welding gun head (23); the two wiping blocks (37) are respectively located on both sides of the inner welding gun head (23); and a wiping strip (38) is fixedly connected to the end of the scraping block (36) and the wiping block (37) away from the rotating sleeve (21).

7. A tower pressure vessel welding device according to claim 6, characterized in that: A wedge block (33) is fixedly connected to one end of the extrusion block (32) away from the pushing cylinder (31), and the wedge block (33) matches the connecting frame (35). An anti-slip block (39) is fixedly connected to one side of the connecting frame (35). An anti-slip groove (41) matching the anti-slip block (39) is provided on one side of the connecting plate (40). An anti-slip rod (42) is slidably connected to the middle position of the anti-slip block (39). The anti-slip rod (42) is fixedly connected to the connecting plate (40). An upper end of the anti-slip rod (42) is sleeved with an upper pull elastic member (43), and the lower end of the upper pull elastic member (43) is fixedly connected to the anti-slip block (39). The upper end of the upper pull elastic member (43) is fixedly connected to the top of the anti-slip groove (41). A storage groove (34) matching the top of the connecting frame (35) is provided at the bottom of the extrusion block (32).

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