A welding device for a tower-type pressure vessel

Abstract

The present invention relates to the technical field of welding devices, and discloses a welding device for a tower-type pressure vessel, which includes a main body of a welding machine. One side of the main body of the welding machine is fixedly connected with a mounting rod. The end of the mounting rod away from the main body of the welding machine is rotatably connected with a rotating sleeve. The top of the end of the mounting rod away from the main body of the welding machine is fixedly connected with a rotating motor. The output end of the rotating motor is fixedly connected with a gear. A plurality of tooth blocks meshing with the gear are fixedly connected to the outer wall of the rotating sleeve. The bottom of the rotating sleeve is fixedly connected with an inner welding torch head. One end of the rotating sleeve away from the mounting rod is connected with a positioning component. The top of the mounting rod is fixedly connected with an outer frame. For this welding device for a tower-type pressure vessel, when welding a circumferential seam, welding can be carried out by rotating the inner welding torch head and the outer welding torch head. In this way, the dual risks of structural stability and personnel safety hidden during the rotation of the workpiece can be avoided, making the welding process safer.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and particularly to a welding device for a tower-type pressure vessel. Background Art

[0002] A tower-type pressure vessel is a large cylindrical structure specifically designed to withstand internal or external pressure, and is usually applied in industries such as petroleum, chemical industry, natural gas, and nuclear power. Such containers are named because of their shape similar to a tower. In the manufacturing process of tower-type pressure vessels, the welding link is undoubtedly the most crucial one, and a variety of welding technologies and equipment will be used to ensure its quality. Among these numerous welding equipment, the commonly used one 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. Above the slide rail, there is a moving carriage. At the bottom of the moving carriage, an electric telescopic rod is fixed. The telescopic end of the electric telescopic rod is fixed with a lifting plate. At the top of the lifting plate, a fixed box is fixed. The inner bottom wall of the fixed box is rotatably connected with a rotating column. The top end of the rotating column penetrates the top of the fixed box and is fixed with a fixed rod. This automatic submerged arc welding machine, by setting a lower semi-circular ring, a lower cleaning layer, an upper semi-circular ring, and an upper cleaning layer, achieves the purpose of cleaning the welding wire to avoid affecting the working quality of the automatic submerged arc welding machine. 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 torch head, namely electric and manual, are provided, and the operation steps are simple, so as to facilitate the adjustment of the installation angle of the welding torch head.

[0004] The automatic submerged arc welding machine in the above patent still has certain defects:

[0005] For the current tower-type pressure vessels, when performing circumferential seam welding operations with the help of an automatic submerged arc welding machine, it is often necessary to rely on auxiliary equipment such as a roller rack to rotate the workpiece. Although this approach simplifies the welding process, due to the huge volume and astonishing self-weight of the tower-type pressure vessels, there are double risks of structural stability and personnel safety during the rotation process. If in order to avoid these risks and improve the stability and safety of the welding operation, the way of rotating the workpiece is abandoned, then the automatic submerged arc welding machine will be difficult to ensure the accuracy of the welding path, thereby resulting in a decrease in work efficiency. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a welding device for a tower-type pressure vessel, enabling the welding machine main body to accurately weld the circumferential seam even without rotating the workpiece during welding.

[0007] To achieve the above object, the present invention provides the following technical solution: A tower-type pressure vessel welding device, including a welding machine main body, one side of the welding machine main body is fixedly connected with an installation rod, the end of the installation rod away from the welding machine main body is rotatably connected with a rotating sleeve, the top of the end of the installation rod away from the welding machine main body is fixedly connected with a rotating motor, the output end of the rotating motor is fixedly connected with a gear, the outer wall of the rotating sleeve is fixedly connected with a plurality of tooth blocks meshing with the gear, the bottom of the rotating sleeve is fixedly connected with an inner welding gun head, one end of the rotating sleeve away from the installation rod is connected with a positioning component, the top of the installation rod is fixedly connected with an outer frame, one end of the outer frame away from the welding machine main body is equipped with a walking component, an outer welding gun head is slidably connected to the walking component, and a support frame is arranged on one side of the welding machine main body, and the inner side of the support frame is fixedly connected with a lower connecting rail matching the outer frame.

[0008] Further, the walking component includes a moving frame, a walking motor and walking rollers. 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 rollers are matched with the lower guide rail groove and the upper guide rail groove, the walking rollers are rotatably connected with the moving frame, the walking motor is fixedly connected with the moving frame, and the output end of the walking motor penetrates through the moving frame and is fixedly connected with one of the walking rollers.

[0009] Further, one end of the outer welding gun head away from the installation rod is fixedly connected with a connecting block, one side of the connecting block is fixedly connected with a slider, a chute matching the slider is opened on the outer wall of the moving frame, and one end of the moving frame away from the outer welding gun head is threadedly connected with a threaded rod, and the threaded rod is rotatably connected with the connecting block.

[0010] Further, a plurality of equally spaced blocks are fixedly connected to the sides of the outer frame and the lower connecting rail away from the installation rod, a guiding block is fixedly connected to the side of the moving frame close to the block, and a guiding groove is opened at the end of the guiding block away from the moving frame.

[0011] Further, the positioning component includes a limiting plate, a positioning frame, a positioning roller, a pushing cylinder and a pressing block. A plurality of equally spaced limiting plates are fixedly connected to the outer wall of the rotating sleeve, one side of each limiting plate is slidably connected with a positioning frame, one end of the positioning frame away from the rotating sleeve is rotatably connected with a positioning roller, a pushing cylinder is fixedly connected to the inside of the installation rod, the output end of the pushing cylinder is fixedly connected with a pressing block matching the positioning frame, and the pressing block is slidably connected with the rotating sleeve.

[0012] Further, a limiting groove is formed on one side of the limiting plate close to the positioning frame. A limiting block fixedly connected to the positioning frame is slidably connected inside the limiting groove. A limiting column fixedly connected to the limiting plate is slidably connected in the middle of the limiting block. A reset elastic member is sleeved on the lower end of the limiting column. 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.

[0013] Further, a connecting plate is fixedly connected to the bottom of the end of the rotating sleeve away from the mounting rod. A connecting frame is slidably connected to one 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 one side of the scraping block close to the inner welding torch head. The two wiping blocks are respectively located on both sides of the inner welding torch head. Wiping strips are fixedly connected to the ends of the scraping block and the wiping blocks away from the rotating sleeve.

[0014] Further, a wedge-shaped block is fixedly connected to the end of the extrusion block away from the pushing cylinder. The wedge-shaped block is matched with the connecting frame. An anti-disengagement block is fixedly connected to one side of the connecting frame. An anti-disengagement groove matched with the anti-disengagement block is formed on one side of the connecting plate. An anti-disengagement rod is slidably connected to the middle position of the anti-disengagement block. The anti-disengagement rod is fixedly connected to the connecting plate. An upward pulling elastic member is sleeved on the upper end of the anti-disengagement rod. The lower end of the upward pulling elastic member is fixedly connected to the anti-disengagement block, and the upper end of the upward pulling elastic member is fixedly connected to the top of the anti-disengagement groove. A receiving groove matched with the top of the connecting frame is formed at the bottom of the extrusion block.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When welding a workpiece with this tower-type pressure vessel welding device, it is only necessary to first place the workpiece on an external roller rack, then place the support frame under the weld seam, and then move the welding machine main body to align the inner welding torch head and the outer welding torch head with the weld seam. Finally, start the device, and the inner welding torch head and the outer welding torch head will rotate around the mounting rod as the axis, thereby completing the welding of the weld seam. In this way, the dual risks of structural stability and personnel safety hidden during the rotation of the workpiece can be avoided, making the welding process safer.

[0017] 2. After the inner welding torch head is aligned with the weld seam, the pushing cylinder can be started. The pushing cylinder drives the extrusion block to move, and the positioning frame is pushed towards the inner wall of the workpiece through the extrusion block until the positioning roller abuts against the inner wall of the workpiece. In this way, the stability of the inner welding torch head can be improved, and the relative displacement between two adjacent workpieces can be prevented.

[0018] 3. After the welding work is completed, the extrusion block can be pushed by the pushing cylinder for a certain distance away from the mounting rod, so that the positioning frame loses its restriction, facilitating the positioning frame to return to its original position under the pulling 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 still closely adhere to the inner wall of the workpiece. Then, the main body of the welding machine is moved towards the outside of the workpiece. At this time, the wiping strip will wipe the lower part of the workpiece, thereby taking out the welding slag generated during welding from the workpiece. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the support frame of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the main body of the welding machine of the present invention;

[0022] Figure 4 It is a schematic connection structure diagram of the outer frame and the moving frame of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the moving frame of the present invention;

[0024] Figure 6 It is a schematic connection structure diagram of the mounting rod and the rotating sleeve of the present invention;

[0025] Figure 7 It is a three-dimensional structural diagram of the mounting rod and the rotating sleeve when viewed from the left of the present invention;

[0026] Figure 8 For the present invention Figure 7 Partial enlarged structural diagram at A in;

[0027] Figure 9 For the present invention Figure 7 Partial enlarged structural diagram at B in;

[0028] Figure 10 Partial cross-sectional view of the mounting rod of the present invention;

[0029] Figure 11 Cross-sectional view of the mounting rod and the rotating sleeve of the present invention;

[0030] Figure 12 It is a schematic structural diagram of the extrusion block of the present invention.

[0031] In the figure: 1. Welding machine main body; 2. Installation rod; 3. Outer frame; 4. Support frame; 5. Lower connecting rail; 6. Lower guide rail groove; 7. Stopper; 8. Upper guide rail groove; 9. Moving frame; 10. Traveling motor; 11. Traveling roller; 12. Outer welding torch head; 13. Connecting block; 14. Slide block; 15. Slide groove; 16. Threaded rod; 17. Guide block; 18. Guide groove; 19. Rotating motor; 20. Gear; 21. Rotating sleeve; 22. Tooth block; 23. Inner welding torch 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. Receiving groove; 35. Connecting frame; 36. Scraping block; 37. Wiping block; 38. Wiping strip; 39. Anti - detachment block; 40. Connecting plate; 41. Anti - detachment groove; 42. Anti - detachment rod; 43. Upward pulling elastic member; 44. Workpiece. Detailed implementation manner

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0033] Please refer to Figures 1 to 12 , a tower - type pressure vessel welding device, including a welding machine main body 1, one side of the welding machine main body 1 is fixedly connected with an installation rod 2, the end of the installation rod 2 away from the welding machine main body 1 is rotatably connected with a rotating sleeve 21, the top of the end of the installation rod 2 away from the welding machine main body 1 is fixedly connected with a rotating motor 19, the output end of the rotating motor 19 is fixedly connected with a gear 20, the outer wall of the rotating sleeve 21 is fixedly connected with a plurality of tooth blocks 22 meshing with the gear 20, the bottom of the rotating sleeve 21 is fixedly connected with an inner welding torch head 23, the end of the rotating sleeve 21 away from the installation rod 2 is connected with a positioning assembly, the top of the installation rod 2 is fixedly connected with an outer frame 3, one end of the outer frame 3 away from the welding machine main body 1 is provided with a traveling assembly, an outer welding torch head 12 is slidably connected to the traveling assembly, one side of the welding machine main body 1 is provided with a support frame 4, and the inner side of the support frame 4 is fixedly connected with a lower connecting rail 5 matching the outer frame 3.

[0034] In the tower - type pressure vessel welding device of the present invention, when welding the workpiece 44, first place the workpiece 44 on the external roller rack. Then place the support frame 4 under the weld seam between the two workpieces 44. Next, move the welding machine main body 1 so that the inner welding gun head 23 and the outer welding gun head 12 are aligned with the weld seam. Finally, start the rotation motor 19. The rotation motor 19 drives the gear 20 to rotate, and the gear 20 then drives the tooth block 22 to rotate, thereby enabling the tooth block 22 to drive the rotating sleeve 21 to rotate. Since the inner welding gun head 23 is fixedly connected to the rotating sleeve 21, the inner welding gun head 23 will rotate along with the rotating sleeve 21, thus welding the inner side of the weld seam. Since 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 connecting rail 5, the outer welding gun head 12 will move along the direction of the outer frame 3 and the lower connecting rail 5, thereby welding the outer side of the weld seam. This can avoid the double risks of structural stability and personnel safety hidden during the rotation of the workpiece 44, making the welding process safer. At the same time, after welding is completed, starting the reverse rotation of the rotation motor 19 can make the inner welding gun head 23 return to its original position, and the reverse movement of the walking assembly can make the outer welding gun head 12 return to its original position. In this way, it can be avoided that the cables connecting the inner welding gun head 23 and the outer welding gun head 12 are wound around the mounting rod 2 or the outer frame 3, resulting in the cables being pulled off. In addition, the structure of the welding machine main body 1 in the present invention is similar to the structure of an automatic submerged - arc welding machine disclosed in the patent with the patent authorization announcement number CN215698750U, so no further elaboration will be made here.

[0035] As a preferred technical solution of the present invention, the walking assembly includes a moving frame 9, a walking motor 10, and walking rollers 11. An upper guide rail groove 8 is provided on the outer frame 3, and a lower guide rail groove 6 is provided on the lower connecting rail 5. The walking rollers 11 are matched with the lower guide rail groove 6 and the upper guide rail groove 8. The walking rollers 11 are 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 penetrates the moving frame 9 and is fixedly connected to one of the walking rollers 11.

[0036] Specifically, when the outer welding gun head 12 needs to move to weld the outer side of the weld seam, only need to start the walking motor 10. The walking motor 10 drives the walking rollers 11 to rotate, and the walking rollers 11 will drive the moving frame 9 to move along the upper guide rail groove 8 and the lower guide rail groove 6. Since the outer welding gun head 12 is installed on the walking assembly, the outer welding gun head 12 can weld the outer side of the weld seam.

[0037] As a preferred technical solution of the present invention, a connecting block 13 is fixedly connected to one end of the outer welding torch head 12 away from the mounting rod 2. A slider 14 is fixedly connected to one side of the connecting block 13. A sliding groove 15 matching the slider 14 is formed in the outer wall of the moving frame 9. A threaded rod 16 is threadedly connected to one end of the moving frame 9 away from the outer welding torch head 12. The threaded rod 16 is rotatably connected to the connecting block 13.

[0038] Specifically, when it is necessary to adjust the distance between the weld on the workpiece 44 and the outer welding torch head 12, only the threaded rod 16 needs to be rotated. Since the outer welding torch 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 torch head 12, and further increasing or decreasing the distance between the outer welding torch head 12 and the weld.

[0039] As a preferred technical solution of the present invention, a plurality of equally spaced blocks 7 are fixedly connected to the sides of the outer frame 3 and the lower connecting rail 5 away from the mounting rod 2. A guiding block 17 is fixedly connected to the side of the moving frame 9 close to the block 7. A guiding groove 18 is formed at one end of the guiding block 17 away from the moving frame 9.

[0040] Specifically, the cables connected to the outer welding torch head 12 and the traveling motor 10 will be stuck in the guiding groove 18 on the guiding block 17. During the movement of the traveling assembly, the cables will be pulled and moved by the guiding block 17, and then the cables will be wound around the outside of the outer frame 3 and the lower connecting rail 5, avoiding the cables being stuck in the lower guide groove 6 or the upper guide groove 8.

[0041] As a preferred technical solution of the present invention, the positioning assembly includes a limiting plate 24, a positioning frame 25, a positioning roller 26, a pushing cylinder 31 and an extrusion block 32. A plurality of equally spaced limiting plates 24 are fixedly connected to the outer wall of the rotating sleeve 21. A positioning frame 25 is slidably connected to one side of each limiting plate 24. A positioning roller 26 is rotatably connected to one end of the positioning frame 25 away from the rotating sleeve 21. A pushing cylinder 31 is fixedly connected to the inside of the mounting rod 2. The output end of the pushing cylinder 31 is fixedly connected to an extrusion block 32 matching the positioning frame 25. The extrusion block 32 is slidably connected to the rotating sleeve 21.

[0042] As a preferred technical solution of the present invention, a limiting groove 28 is formed on the 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 to the inside of the limiting groove 28. A limiting column 29 fixedly connected to the limiting plate 24 is slidably connected to 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. The bottom of the reset elastic member 30 is fixedly connected to the bottom of the limiting groove 28.

[0043] Specifically, when it is necessary to reinforce one end of the mounting rod 2 far from the main body of the welding machine 1, the pushing cylinder 31 can be started. The pushing cylinder 31 drives the extrusion block 32 to move towards the mounting rod 2. Under the extrusion of the extrusion block 32, the positioning frame 25 will move 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. In this way, it 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 welding is completed, only need to start the pushing cylinder 31 to move the extrusion block 32 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 limiting block 27 to move to the original position, and the limiting block 27 will drive the positioning frame 25 back to the original position, so as to facilitate the positioning assembly to be taken out from the workpiece 44.

[0044] As a preferred technical solution of the present invention, a connecting plate 40 is fixedly connected to the bottom of one end of the rotating sleeve 21 far from the mounting rod 2. A connecting frame 35 is slidably connected to the side of the connecting plate 40 far 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 torch head 23. The two wiping blocks 37 are respectively located on both sides of the inner welding torch head 23. Wiping strips 38 are fixedly connected to the ends of the scraping block 36 and the wiping blocks 37 far from the rotating sleeve 21.

[0045] Specifically, when the extrusion block 32 moves towards the mounting rod 2, the wedge block 33 will also squeeze the connecting frame 35, so that the wiping strips 38 on the scraping block 36 and the wiping blocks 37 are in close contact with the inner wall of the workpiece 44. In this way, during the welding process of the inner welding torch head 23 (since the inner welding torch head 23 is fixed on the rotating sleeve 21, the rotating sleeve 21 needs to rotate during the welding of the inner welding torch head 23), the rotating sleeve 21 will drive the scraping block 36 and the wiping blocks 37 to move synchronously, so as to wipe the un-welded and welded welds. In this way, it can not only clean the welds, but also clean the welding slag generated during welding.

[0046] As a preferred technical solution of the present invention, a wedge block 33 is fixedly connected to the end of the extrusion block 32 far from the pushing cylinder 31. The wedge block 33 is matched with the connecting frame 35. An anti-disengagement block 39 is fixedly connected to one side of the connecting frame 35. An anti-disengagement groove 41 matched with the anti-disengagement block 39 is formed on one side of the connecting plate 40. An anti-disengagement rod 42 is slidably connected to the middle position of the anti-disengagement block 39. The anti-disengagement rod 42 is fixedly connected to the connecting plate 40. An upper pulling elastic member 43 is sleeved on the upper end of the anti-disengagement rod 42. The lower end of the upper pulling elastic member 43 is fixedly connected to the anti-disengagement block 39. The upper end of the upper pulling elastic member 43 is fixedly connected to the top of the anti-disengagement groove 41. A receiving groove 34 matched with the top of the connecting frame 35 is formed on the bottom of the extrusion block 32.

[0047] Specifically, after welding is completed, the pressing block 32 can be pushed away from the mounting rod 2 by the pushing cylinder 31 for a certain distance, so that the positioning frame 25 is no longer restricted, facilitating the positioning frame 25 to return to its original position under the pulling of the reset elastic member 30. At this time, since the wedge-shaped block 33 has not disengaged from the connection frame 35, the scraping block 36 and the wiping strip 38 on the wiping block 37 still closely adhere to the inner wall of the workpiece 44. Then, the main body 1 of the welding machine is moved towards 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 taking out the welding slag generated during welding from the workpiece 44. After the entire device is completely removed from the workpiece 44, the pushing cylinder 31 can be started again to push the pressing block 32 away from the mounting rod 2 until the wedge-shaped block 33 disengages from the connection frame 35. After the connection frame 35 loses its restriction, under the pulling of the upward pulling elastic member 43, the connection frame 35 will drive the scraping block 36 back to its original position.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A tower-type pressure vessel welding device, comprising a welding machine main body (1), characterized in that, One side of the main body (1) of the welding machine is fixedly connected with an installation rod (2). One end of the installation rod (2) far away from the main body (1) of the welding machine is rotatably connected with a rotating sleeve (21). At the top of the end of the installation rod (2) far away from the main body (1) of the welding machine, a rotating motor (19) is fixedly connected. The output end of the rotating motor (19) is fixedly connected with 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). An inner welding gun head (23) is fixedly connected to the bottom of the rotating sleeve (21). One end of the rotating sleeve (21) far away from the installation rod (2) is connected with a positioning component. An outer frame (3) is fixedly connected to the top of the installation rod (2). A traveling component is installed at one end of the outer frame (3) far away from the main body (1) of the welding machine. An outer welding gun head (12) is slidably connected to the traveling component. A support frame (4) is arranged on one side of the main body (1) of the welding machine. A lower connecting rail (5) matching the outer frame (3) is fixedly connected to the inner side of the support frame (4); The traveling component includes a moving frame (9), a traveling motor (10) and traveling rollers (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 traveling rollers (11) match the lower guide rail groove (6) and the upper guide rail groove (8). The traveling rollers (11) are rotatably connected with the moving frame (9). The traveling motor (10) is fixedly connected with the moving frame (9). The output end of the traveling motor (10) penetrates through the moving frame (9) and is fixedly connected with one of the traveling rollers (11); A connecting plate (40) is fixedly connected to the bottom of one end of the rotating sleeve (21) far away from the installation rod (2). A connecting frame (35) is slidably connected to one side of the connecting plate (40) far away from the installation 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 one 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). Wiping strips (38) are fixedly connected to the ends of the scraping block (36) and the wiping blocks (37) far away from the rotating sleeve (21).

2. The welding device for a tower-type pressure vessel according to claim 1, wherein, A connecting block (13) is fixedly connected to one end of the outer welding gun head (12) far away from the installation rod (2). A slider (14) is fixedly connected to one side of the connecting block (13). A chute (15) matching the slider (14) is formed on the outer wall of the moving frame (9). A threaded rod (16) is threadedly connected to one end of the moving frame (9) far away from the outer welding gun head (12). The threaded rod (16) is rotatably connected with the connecting block (13).

3. A tower-type pressure vessel welding device according to claim 1, characterized in that, A plurality of equally spaced blocks (7) are fixedly connected to one side of the outer frame (3) and the lower connecting rail (5) far away from the installation rod (2). A guiding block (17) is fixedly connected to one side of the moving frame (9) close to the block (7). A guiding groove (18) is formed at the end of the guiding block (17) far away from the moving frame (9).

4. The welding device for a tower-type pressure vessel according to claim 1, characterized in that, The positioning assembly includes a limit plate (24), a positioning frame (25), a positioning roller (26), a pushing cylinder (31), and a pressing block (32). A plurality of equally spaced limit plates (24) are fixedly connected to the outer wall of the rotating sleeve (21). A positioning frame (25) is slidably connected to one side of each limit plate (24). A positioning roller (26) is rotatably connected to the end of the positioning frame (25) away from the rotating sleeve (21). A pushing cylinder (31) is fixedly connected to the inside of the mounting rod (2). The output end of the pushing cylinder (31) is fixedly connected to a pressing block (32) that matches the positioning frame (25). The pressing block (32) is slidably connected to the rotating sleeve (21).

5. A tower-type pressure vessel welding device according to claim 4, characterized in that, A limit groove (28) is formed on the side of the limit plate (24) close to the positioning frame (25). A limit block (27) fixedly connected to the positioning frame (25) is slidably connected to the inside of the limit groove (28). A limit post (29) fixedly connected to the limit plate (24) is slidably connected to the middle of the limit block (27). A reset elastic member (30) is sleeved on the lower end of the limit post (29). The top of the reset elastic member (30) is fixedly connected to the bottom of the limit block (27). The bottom of the reset elastic member (30) is fixedly connected to the bottom of the limit groove (28).

6. A tower-type pressure vessel welding device according to claim 4, characterized in that, A wedge block (33) is fixedly connected to the end of the pressing block (32) away from the pushing cylinder (31). The wedge block (33) matches the connecting frame (35). An anti - detachment block (39) is fixedly connected to one side of the connecting frame (35). An anti - detachment groove (41) matching the anti - detachment block (39) is formed on one side of the connecting plate (40). An anti - detachment rod (42) is slidably connected to the middle position of the anti - detachment block (39). The anti - detachment rod (42) is fixedly connected to the connecting plate (40). An upward - pulling elastic member (43) is sleeved on the upper end of the anti - detachment rod (42). The lower end of the upward - pulling elastic member (43) is fixedly connected to the anti - detachment block (39). The upper end of the upward - pulling elastic member (43) is fixedly connected to the top of the anti - detachment groove (41). A receiving groove (34) matching the top of the connecting frame (35) is formed on the bottom of the pressing block (32).

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