Plasma arc welding machine for processing polytetrafluoroethylene storage tank

Abstract

The invention relates to the technical field of welding machines, in particular to a plasma arc welding machine for machining a polytetrafluoroethylene storage tank, which comprises a tank body carrying frame, a welding carrying frame is fixedly arranged on the tank body carrying frame, a welder is mounted on the welding carrying frame, and two movable bearing assemblies are symmetrically arranged on the tank body carrying frame. Two rotating wheel bearing mechanisms are installed on the movable bearing assemblies, supporting rotating wheels are installed on the rotating wheel bearing mechanisms, the two supporting rotating wheels on one movable bearing assembly form a set, a tank is supported through the supporting rotating wheels, a driving matching assembly is further installed on the tank carrying frame, an adjusting carrying plate is arranged on the tank carrying frame, and the driving matching assembly is matched with the adjusting carrying plate. Adjustment of the distance between two supporting rotating wheels in one set and adjustment of the distance between two sets of supporting rotating wheels can be synchronously achieved by adjusting movement of the carrying plate, so that the device can adapt to tank bodies with different diameters and lengths, is very convenient and does not need manual operation, and time and labor are saved.

Description

Technical Field

[0001] The invention relates to the technical field of welding machines, in particular to a plasma arc welding machine for processing polytetrafluoroethylene storage tanks. Background Art

[0002] A polytetrafluoroethylene-lined storage tank is a container commonly used to store chemicals and liquids. It consists of an outer metal shell and an inner polytetrafluoroethylene membrane. During the production process, the outer metal shell needs to be welded to weld the end cover to the tank body. Since storage tanks are generally large, a wheel is used to support the tank body for the convenience of welding. That is, the wheel is driven by a motor to rotate, and then the tank body can be driven to rotate under the action of the wheel, so that the welder can evenly weld the connection between the end cover and the tank body.

[0003] The plasma arc welding machine under the existing technology is generally provided with two groups of wheels, each group has two wheels, which support the tank body from both sides. The distance between the wheels in a group can be adjusted for tank bodies of different diameters so as to adapt to tank bodies of different diameters. However, it is necessary to manually adjust the wheels of each group separately during adjustment, which is not convenient enough and cannot be adjusted synchronously. Moreover, the spacing between the two groups of wheels cannot be adaptively adjusted according to the length of the tank body to enable it to better support the tank body and fully ensure the safety during the welding process. Furthermore, since the tank body is supported by the wheels, the wheels, as direct supporting components, may be damaged during long-term use, and the wheels cannot be conveniently installed and disassembled for easy maintenance or replacement. Summary of the Invention

[0004] The object of the present invention is to provide a plasma arc welding machine for processing polytetrafluoroethylene storage tanks to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A plasma arc welding machine for processing polytetrafluoroethylene storage tanks, comprising a tank carrier, a welding carrier fixedly mounted on the tank carrier, a welder mounted on the welding carrier, two movable bearing assemblies symmetrically arranged on the tank carrier, and two rotating wheel bearing mechanisms mounted on the movable bearing assemblies;

[0007] The wheel bearing mechanism is provided with a supporting wheel, and two supporting wheels on a mobile bearing assembly form a group, and the tank body is supported by the supporting wheels;

[0008] The tank carrier is also equipped with a driving and matching assembly, which is connected to the movable bearing assembly to drive it to move, thereby achieving the distance adjustment between the two sets of supporting wheels;

[0009] The movable bearing assembly is provided with an inner-group spacing adjustment mechanism, which is connected to the driving and matching assembly and is driven to move by the driving and matching assembly;

[0010] The rotating wheel supporting mechanism is provided with a rotating wheel convenient installation and removal mechanism, and the rotating wheel is supported and installed through the rotating wheel convenient installation and removal mechanism.

[0011] Preferably, the movable bearing assembly is a bearing movable plate, and protruding end plates are symmetrically fixedly provided at both ends of the bearing movable plate.

[0012] Preferably, a matching bearing rod is fixedly provided between the protruding end plates, and the rotating wheel bearing mechanism is supported by the matching bearing rod.

[0013] Preferably, the wheel bearing mechanism is an adjustable bearing frame, a rotating shaft is provided on the adjustable bearing frame, the supporting wheel is sleeved on the rotating shaft, and the supporting wheel is driven to rotate by the rotating shaft.

[0014] Preferably, the rotating wheel convenient installation and removal mechanism includes a movable fixed wheel plate and a matching bearing shaft, and the movable fixed wheel plate is installed on the adjustment support frame.

[0015] Preferably, the matching bearing shaft is installed on the movable fixed wheel plate, and the matching bearing shaft cooperates with the supporting wheel to realize the installation of the supporting wheel.

[0016] Preferably, the driving matching assembly includes a hydraulic rod, an adjustment carrier plate and a first adjustment carrier rod, the hydraulic rod is fixedly mounted on the tank carrier, and the adjustment carrier plate is fixedly mounted on the hydraulic rod.

[0017] Preferably, a first adjusting carrier rod is symmetrically hinged on the adjusting carrier plate, a supporting movable plate is hinged on the other end of the first adjusting carrier rod, and a movable supporting rod is symmetrically fixedly provided on the adjusting carrier plate.

[0018] Preferably, the intra-group spacing adjustment mechanism includes a connecting rack, a bearing column and a driving connecting block, and the connecting rack is movably connected to the movable supporting rod.

[0019] Preferably, a connecting gear is fixedly provided on the bearing column, and the connecting gear is engaged with a connecting rack, and the connecting gear is driven to rotate by the connecting rack.

[0020] Preferably, a threaded vertical rod is fixedly provided on the upper end of the connecting gear, a driving connecting block is threadedly connected to the threaded vertical rod, and the driving connecting block is movably connected to the adjusting bearing frame to drive the adjusting bearing frame to move.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. An adjustment plate is provided on the tank carrier. By adjusting the movement of the plate, the spacing between the two supporting runners in one group and the spacing between the two groups of supporting runners can be adjusted synchronously, so that it can adapt to tanks of different diameters and lengths. It is very convenient and does not require manual operation, saving time and effort. When the spacing between the two groups of supporting runners becomes larger, the spacing between the two supporting runners in one group also becomes larger, which can adapt to tanks with longer diameters and larger diameters. Similarly, when the spacing between the two groups of supporting runners becomes smaller, the spacing between the two supporting runners in one group also becomes smaller, which can adapt to tanks with shorter diameters and shorter diameters, and the adjustment efficiency is high.

[0023] 2. In addition, when the support wheels need to be repaired or replaced, it is only necessary to synchronously adjust the interval between the two groups of support wheels and the interval between the two support wheels in one group to the minimum state. At this time, the support wheels can be unlocked and can be quickly disassembled for repair or replacement without complicated installation and disassembly operations. This not only greatly reduces the workload of the staff, but also improves the work efficiency of repairing or replacing the support wheels, which is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the tank carrier assembly from the first perspective.

[0025] Figure 2 Schematic diagram of the tank carrier assembly from the first perspective.

[0026] Figure 3 Schematic diagram of the structure of the tank carrier.

[0027] Figure 4 A schematic diagram from the first perspective of the assembly of the adjustable carrier plate and the supporting movable plate.

[0028] Figure 5 A schematic diagram from a second perspective of the assembly of the adjusting carrier plate and the supporting movable plate.

[0029] Figure 6 This is a first-person perspective diagram of the load-bearing movable plate assembly.

[0030] Figure 7 A second-view schematic diagram of the load-bearing movable plate assembly.

[0031] Figure 8 It is a structural diagram of the supporting movable plate.

[0032] Figure 9 This is a schematic diagram of the assembly of the adjustable carrier frame.

[0033] Figure 10 Schematic diagram of the structure supporting the runner.

[0034] Figure 11 It is a schematic diagram of the assembly of the bearing column and the driving connecting block.

[0035] In the figure: 1. Tank carrier; 11. Moving cavity; 12. Moving carrier rod; 13. Protruding bearing plate; 14. Hydraulic rod; 15. First bearing rod; 16. Second bearing rod; 17. Welding carrier; 18. Welder; 2. Adjusting carrier plate; 21. First bearing hole; 22. First adjusting carrier rod; 23. Moving bearing rod; 24. Support block; 25. Second bearing hole; 3. Carrying movable plate; 31. Protruding end plate; 32. Matching bearing rod; 33. Stabilizing carrier strip; 34. Stabilizing cavity; 35. Oblique carrier strip; 36. Moving channel; 37. Lower carrier plate; 371. Matching hole; 38. Protruding plate strip; 381. Support matching rod; 39. Moving bearing block; 391. Moving bearing hole; 4. Adjusting carrier; 41. Matching moving hole; 42. Protruding connecting plate; 43 , rotating shaft; 44, connecting key; 45, limiting plug plate; 46, protruding side plate; 47, matching support rod; 48, limit baffle; 5, movable fixed wheel plate; 51, load-bearing protrusion; 52, supporting hole; 53, through the channel; 54, matching bearing; 55, matching bearing shaft; 56, supporting disc; 57, supporting plug column; 58, limiting slot; 59, hanging bar; 591, matching connecting column; 6, supporting wheel; 61, matching shaft hole; 62, key cavity; 63, supporting plug hole; 7, connecting rack; 71, movable bearing block; 72, connecting connecting plate; 73, connecting connecting hole; 8, load-bearing column; 81, connecting bearing; 82, connecting gear; 83, threaded vertical rod; 9, driving connecting block; 91, threaded connecting hole; 92, connecting support plate; 93, second adjusting load rod. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The present invention provides a technical solution:

[0038] like Figure 1 and Figure 2As shown, a plasma arc welding machine for processing polytetrafluoroethylene storage tanks includes a tank carrier 1, a welding carrier 17 is fixedly provided on the tank carrier 1, a welder 18 is installed on the welding carrier 17, two mobile bearing assemblies are symmetrically provided on the tank carrier 1, two rotary bearing mechanisms are installed on the mobile bearing assembly, and a supporting rotary wheel 6 is installed on the rotary bearing mechanism. The two supporting rotary wheels 6 on a mobile bearing assembly form a group, and the tank body is supported by the supporting rotary wheel 6. A driving matching assembly is also installed on the tank carrier 1, and the driving matching assembly is connected to the mobile bearing assembly to drive it to move, thereby realizing the distance adjustment between the two groups of supporting rotary wheels 6, and an intra-group spacing adjustment mechanism is installed on the mobile bearing assembly. The intra-group spacing adjustment mechanism is connected to the driving matching assembly and is driven to move by the driving matching assembly. A convenient rotary wheel installation and disassembly mechanism is provided on the rotary bearing mechanism, and the support rotary wheel 6 is installed by the convenient rotary wheel installation and disassembly mechanism.

[0039] like Figure 3 As shown, movable cavities 11 are symmetrically provided on both sides of the tank carrier 1, and movable carrying rods 12 are fixedly provided in the movable cavities 11. A protruding supporting plate 13 is fixedly provided on one side of the tank carrier 1. In addition, a first supporting rod 15 is fixedly provided on the tank carrier 1, and second supporting rods 16 are symmetrically fixedly provided at both ends of the tank carrier 1.

[0040] like Figure 1 and Figure 8 The movable bearing assembly shown is a bearing movable plate 3, and protruding end plates 31 are symmetrically fixed at both ends of the bearing movable plate 3. A matching bearing rod 32 is fixed between the protruding end plates 31, and the rotating wheel bearing mechanism is supported by the matching bearing rod 32. Stable carrying strips 33 are symmetrically fixed on the bearing movable plate 3, and a stable cavity 34 is opened on the stable carrying strip 33. The stable carrying strip 33 is connected to an oblique carrying strip 35, and a moving channel 36 is opened on the oblique carrying strip 35. The width of the stable cavity 34 is equal to that of the moving channel 36, and The inner walls of both are smooth and free of burrs. A lower bearing plate 37 is fixedly provided at the lower end of the supporting movable plate 3. A loading hole 371 is provided on the lower bearing plate 37, and protruding strips 38 are symmetrically fixed on the lower bearing plate 37. Support matching rods 381 are fixed between the protruding strips 38. In addition, mobile bearing blocks 39 are symmetrically fixed at both ends of the supporting movable plate 3. A mobile bearing hole 391 is provided on the mobile bearing block 39. The mobile bearing block 39 is inserted into the mobile cavity 11, and the mobile bearing hole 391 cooperates with the mobile load rod 12.

[0041] like Figure 6 、 Figure 7 、 Figure 9 and Figure 10As shown, the wheel bearing mechanism is an adjusting bearing frame 4, and a rotating shaft 43 is provided on the adjusting bearing frame 4. The supporting wheel 6 is sleeved on the rotating shaft 43, and the supporting wheel 6 is driven to rotate by the rotating shaft 43. A matching moving hole 41 is provided on the lower side of the adjusting bearing frame 4, and a matching bearing rod 32 is inserted in the matching moving hole 41. A protruding connecting plate 42 is fixedly provided on one side of the adjusting bearing frame 4, and a connecting key 44 is fixedly provided on the circumference of the rotating shaft 43, and the rotating shaft 43 is driven to rotate by a motor under the existing technology, and a limiting plug plate 45 is fixedly provided on the other side of the adjusting bearing frame 4, and a protruding side plate 46 is also fixedly provided on the side of the adjusting bearing frame 4 where the limiting plug plate 45 is provided, and a matching support rod 47 is fixedly provided on the protruding side plate 46, and a limiting baffle 48 is fixedly provided on the matching support rod 47.

[0042] A matching shaft hole 61 is provided at one end of the supporting wheel 6, and a key cavity 62 is provided around the circumference of the matching shaft hole 61. The matching shaft hole 61 cooperates with the rotating shaft 43, and the key cavity 62 cooperates with the connecting key 44. A supporting socket 63 is also provided at the other end of the supporting wheel 6.

[0043] The convenient installation and disassembly mechanism of the rotating wheel includes a movable fixed wheel plate 5 and a matching bearing shaft 55. The movable fixed wheel plate 5 is installed on the adjusting carrier frame 4. The matching bearing shaft 55 is installed on the movable fixed wheel plate 5. The matching bearing shaft 55 cooperates with the supporting rotating wheel 6 to realize the installation of the supporting rotating wheel 6. A bearing protrusion 51 is fixedly provided on one side of the movable fixed wheel plate 5. A supporting hole 52 is provided on the bearing protrusion 51. A matching supporting rod 47 is inserted in the supporting hole 52. A through channel 53 is provided on the movable fixed wheel plate 5 next to the bearing protrusion 51. The through channel 53 is aligned with the limiting plug plate 45. A matching bearing 54 is installed on the fixed wheel plate 5, and the matching bearing 54 is matched with a matching bearing shaft 55. A supporting disc 56 is fixedly provided on the matching bearing shaft 55, and a supporting column 57 is fixedly provided on the supporting disc 56. A limiting slot 58 is provided on the supporting disc 56. A drooping bar 59 is fixedly provided at the lower end of the movable fixed wheel plate 5, and a matching connecting column 591 is fixedly provided at the lower end of the drooping bar 59. When the supporting column 57 is not inserted into the supporting socket 63, the matching connecting column 591 is inserted into the movable channel 36 and contacts the inner wall of the movable channel 36.

[0044] like Figure 2 、 Figure 4 and Figure 5As shown, the driving matching assembly includes a hydraulic rod 14, an adjusting carrier plate 2 and a first adjusting carrier rod 22. The hydraulic rod 14 is fixedly mounted on the tank carrier 1, that is, the hydraulic rod 14 is fixed on the protruding carrier plate 13, and the adjusting carrier plate 2 is fixedly mounted on the hydraulic rod 14. The first adjusting carrier rod 22 is symmetrically hinged on the adjusting carrier plate 2, and the other end of the first adjusting carrier rod 22 is hinged to the bearing movable plate 3, and the adjusting carrier plate 2 is also symmetrically fixed with a mobile supporting rod 23. A first supporting hole 21 is provided on the adjusting carrier plate 2, and a first supporting rod 15 is inserted in the first supporting hole 21. The first supporting rod 15 supports the adjusting carrier plate 2, and a supporting block 24 is fixedly provided on the mobile supporting rod 23. A second supporting hole 25 is provided on the supporting block 24, and a second supporting rod 16 is inserted in the second supporting hole 25. The second supporting rod 16 supports the supporting block 24.

[0045] like Figure 5 、 Figure 6 and Figure 11 As shown, the intra-group spacing adjustment mechanism includes a connecting rack 7, a supporting column 8 and a driving connecting block 9. The connecting rack 7 is movably connected to the movable supporting rod 23. A connecting gear 82 is fixedly provided on the supporting column 8. The connecting gear 82 is engaged with the connecting rack 7, and the connecting gear 82 is driven to rotate by the connecting rack 7. A movable supporting block 71 is fixedly provided at the lower end of the connecting rack 7. The movable supporting block 71 is sleeved on the supporting matching rod 381 and can move along the supporting matching rod 381. A connecting plate 72 is also fixedly provided at one end of the connecting rack 7. A connecting hole 73 is provided on the connecting plate 72. The movable supporting rod 23 is inserted into the connecting hole 73. The connecting rack 7 can move along the movable supporting rod 23.

[0046] A connecting bearing 81 is sleeved on the bearing column 8, and the connecting bearing 81 is installed in the loading hole 371. A threaded vertical rod 83 is fixedly provided on the upper end of the connecting gear 82, and a driving connecting block 9 is threadedly connected to the threaded vertical rod 83. The driving connecting block 9 is movably connected to the adjustment support frame 4 to drive the adjustment support frame 4 to move. A threaded connecting hole 91 is provided on the driving connecting block 9, and the threaded connecting hole 91 is threadedly matched with the threaded vertical rod 83, and a connecting support plate 92 is symmetrically fixed on the driving connecting block 9, and a second adjusting load rod 93 is hinged on the connecting support plate 92. The upper end of the second adjusting load rod 93 is hinged to the protruding connecting plate 42 on the adjustment load frame 4.

[0047] When installing the supporting wheel 6, the hydraulic rod 14 is not extended. At this time, the distance between the two supporting movable plates 3 is the smallest, and the distance between the two supporting wheels 6 on one supporting movable plate 3 is the smallest. The movable fixed wheel plate 5 is farthest from the adjusting carrier frame 4. A limiting plug 45 is inserted in the limiting slot 58. Under the action of the limiting plug 45, the supporting disc 56 is restricted. Then, the supporting wheel 6 is sleeved on the rotating shaft 43. At this time, the hydraulic rod 14 can be started to drive the adjusting carrier plate 2 to move away from the protruding carrier plate 13. As the adjusting carrier plate 2 moves, it will drive the connecting rack 7 to move. As the connecting rack 7 moves, it will drive the connecting gear 82 to rotate, and then the thread is worked. The driving connecting block 9 is driven to move upward. As the driving connecting block 9 moves upward, the two adjusting carriers 4 on a supporting movable plate 3 are moved in opposite directions under the action of the second adjusting carrier rod 93, and then the matching connecting column 591 is moved along the moving channel 36, so that the movable fixed wheel plate 5 moves toward the direction of the adjusting carrier 4, so that the supporting plug 57 can be smoothly inserted into the supporting socket 63. When the supporting plug 57 is fully inserted into the supporting socket 63, the supporting disc 56 is in contact with the supporting wheel 6, the limiting slot 58 is separated from the limiting plug plate 45, the matching bearing shaft 55 can be rotated, and the matching connecting column 591 also reaches the stable cavity 34 at this time, and the movable fixed wheel plate 5 It will no longer move relative to the adjustment carrier frame 4. At this time, the installation of the supporting wheel 6 is completed. During the welding process, the connecting column 591 is always moved in the stable cavity 34 to ensure the stability of the movable fixed wheel plate 5. In addition, when the adjustment carrier plate 2 moves in the direction away from the protruding carrier plate 13, the two supporting movable plates 3 will be driven to move back to each other under the action of the first adjustment carrier rod 22. When adjusting the supporting wheel 6, as the adjustment carrier plate 2 moves in the direction away from the protruding carrier plate 13, the distance between the two supporting movable plates 3 will be increased, and the distance between the two supporting runners 6 on one supporting movable plate 3 will also be increased, so that it can adapt to longer and larger diameter tanks. When welding is required and the spacing needs to be adjusted to a smaller size, the hydraulic rod 14 only needs to drive the adjustment carrier plate 2 to move closer to the protruding carrier plate 13 to reduce the distance, which is suitable for shorter and smaller diameter tanks. It is very convenient and can achieve synchronous adjustment. When the support wheel 6 needs to be disassembled, the spacing is adjusted to the minimum, which can move the movable fixed wheel plate 5 to the farthest distance from the adjustment carrier frame 4. In this way, the support wheel 6 can be unlocked and can be quickly removed. At this time, the limiting plug plate 45 restricts the support disc 56 so that it cannot rotate. In this way, when installing the support wheel 6, the support socket 63 can be aligned with the support column 57, which facilitates the installation of the support wheel 6.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A plasma arc welding machine for processing polytetrafluoroethylene storage tanks, comprising a tank carrier, a welding carrier fixedly mounted on the tank carrier, and a welder mounted on the welding carrier, characterized in that: Two movable bearing assemblies are symmetrically arranged on the tank carrier, and two rotating wheel bearing mechanisms are installed on the movable bearing assemblies; The wheel bearing mechanism is provided with a supporting wheel, and two supporting wheels on a mobile bearing assembly form a group, and the tank body is supported by the supporting wheels; The tank carrier is also equipped with a driving and matching assembly, which is connected to the movable bearing assembly to drive it to move, thereby achieving the distance adjustment between the two sets of supporting wheels; The movable bearing assembly is provided with an inner-group spacing adjustment mechanism, which is connected to the driving and matching assembly and is driven to move by the driving and matching assembly; The rotating wheel supporting mechanism is provided with a rotating wheel convenient installation and removal mechanism, and the rotating wheel is supported and installed through the rotating wheel convenient installation and removal mechanism.

2. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 1, characterized in that: The movable bearing assembly is a bearing movable plate, and protruding end plates are symmetrically fixedly provided at both ends of the bearing movable plate.

3. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 2, characterized in that: Matching bearing rods are fixedly arranged between the protruding end plates, and the rotating wheel bearing mechanism is supported by the matching bearing rods.

4. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 3, characterized in that: The wheel bearing mechanism is an adjustment bearing frame, a rotating shaft is provided on the adjustment bearing frame, the supporting wheel is sleeved on the rotating shaft, and the supporting wheel is driven to rotate by the rotating shaft.

5. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 4, characterized in that: The rotating wheel convenient installation and removal mechanism comprises a movable fixed wheel plate and a matching bearing shaft, and the movable fixed wheel plate is installed on the adjustment bearing frame.

6. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 5, characterized in that: The matching bearing shaft is installed on the movable fixed wheel plate, and the matching bearing shaft cooperates with the supporting rotating wheel to realize the installation of the supporting rotating wheel.

7. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 6, characterized in that: The driving and matching assembly includes a hydraulic rod, an adjustment carrier plate and a first adjustment carrier rod. The hydraulic rod is fixedly mounted on the tank carrier, and the adjustment carrier plate is fixedly mounted on the hydraulic rod.

8. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 7, characterized in that: The adjusting carrier plate is symmetrically hinged with a first adjusting carrier rod, the other end of the first adjusting carrier rod is hinged with a bearing movable plate, and the adjusting carrier plate is further symmetrically fixed with a movable bearing rod.

9. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 8, characterized in that: The intra-group spacing adjustment mechanism includes a connecting rack, a bearing column and a driving connecting block, and the connecting rack is movably connected to the movable supporting rod.

10. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 9, characterized in that: A connecting gear is fixedly provided on the bearing column, and the connecting gear is engaged with the connecting rack, and the connecting gear is driven to rotate by the connecting rack.

11. The plasma arc welding machine for processing polytetrafluoroethylene storage tanks according to claim 10, characterized in that: A threaded vertical rod is fixedly provided on the upper end of the connecting gear, and a driving connecting block is threadedly connected to the threaded vertical rod. The driving connecting block is movably connected to the adjusting bearing frame to drive the adjusting bearing frame to move.

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