Welding device for chemical pressure vessel

Abstract

A welding device for a chemical pressure vessel comprises a mounting box body, an adjusting and supporting device, a synchronous driving device and follow-up clamping devices, the adjusting and supporting device is arranged on the mounting box body in a sliding mode, the synchronous driving device is fixedly arranged on the mounting box body and used for synchronous rotation driving of a barrel to be tailor-welded, the number of the follow-up clamping devices is two, and the adjusting and supporting device is arranged on the mounting box body. The two groups of follow-up clamping devices are the same in structure, the two groups of follow-up clamping devices are rotationally arranged on the mounting box body respectively and are used for clamping and positioning a barrel, any group of follow-up clamping device comprises a sliding block and a clamping plate, the sliding block is used for controlling conversion of clamping action and rotating action, and the clamping plate is used for clamping and positioning the barrel. The synchronous driving device can synchronously transmit driving force to the two sets of follow-up clamping devices, so that the two sets of follow-up clamping devices drive the clamped barrel to rotate synchronously, the barrel is prevented from moving relatively, the spot welding fixing procedure can be omitted, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure vessel welding, and in particular relates to a welding device for chemical pressure vessels. Background Art

[0002] Pressure vessels refer to closed equipment that contains gas or liquid and bears a certain pressure. Pressure vessels are widely used, and are most commonly used in the chemical industry and petrochemical industry. In the chemical and petrochemical fields, pressure vessels are mainly used in heat transfer, mass transfer, reaction and other process processes, as well as the storage and transportation of pressurized gas or liquefied gas.

[0003] In the manufacturing process of chemical pressure vessels, since it is difficult for existing pressure vessel processing equipment to achieve synchronous rotation of welded cylinders, the cylinders of the chemical pressure vessels are usually fixed and spliced ​​first. After determining that the concentricity of each cylinder meets the requirements, spot welding is performed to fix the connection, and then the pressure vessel is rotationally welded. The overall processing process is cumbersome, which reduces the manufacturing efficiency of the chemical pressure vessel. At the same time, due to the heavy weight of the pressure vessel, it is inconvenient to clamp and fix. Summary of the invention

[0004] In order to overcome some of the problems mentioned in the above background, the present invention provides a welding device for a chemical pressure vessel.

[0005] According to the technical solution of the present invention, there is provided a welding device for a chemical pressure vessel, comprising a mounting box, an adjustment support device, a synchronous drive device and a follower clamping device; The adjustment support device is slidably arranged on the installation box body, and is used for supporting the cylinder body and adjusting the position angle; the synchronous drive device is fixedly arranged on the installation box body, and is used for synchronous rotation drive of the cylinder body to be welded; The follow-up clamping device is provided with two groups, and the two groups of the follow-up clamping devices have the same structure. The two groups of the follow-up clamping devices are rotatably arranged on the mounting box body respectively, and are used for clamping and positioning the cylinder body. Any group of the follow-up clamping device includes a sliding block and a clamping plate, the sliding block is used to control the conversion between the clamping action and the rotation action, and the clamping plate is used to clamp and position the cylinder body.

[0006] Furthermore, the mounting box is in the shape of a hollow rectangular parallelepiped with an opening at the upper end, a linear guide is fixedly provided on the mounting box, the linear guide is symmetrically provided about the center plane of the mounting box, a sliding plate is slidably provided on the linear guide, a mounting plate is fixedly provided on the sliding plate, a group of follow-up clamping devices are rotatably provided on the mounting plate on the sliding plate, an adjusting cylinder is fixedly provided on the mounting box, the protruding end of the adjusting cylinder is fixedly provided on the sliding plate, a fixing plate is fixedly provided on the mounting box, the fixing plate is provided on one end of the mounting box, a fixing plate is fixedly provided on the fixing plate, and another group of follow-up clamping devices are rotatably provided on the mounting plate on the fixing plate.

[0007] Furthermore, any group of the follow-up clamping device also includes a rotating plate, which is rotatably arranged on the mounting plate, an electromagnetic suction cup is fixedly arranged on the rotating plate, a rotating shaft is fixedly arranged on the rotating plate, an active rotating rod is fixedly arranged on one end of the rotating shaft, the active rotating rod is arranged in a rectangular shape, the sliding block is slidably arranged on the active rotating rod, a pressure block is fixedly arranged on the sliding block, the pressure block is arranged in a wedge shape, and the pressure block is symmetrically arranged about the center plane of the sliding block, a force plate is fixedly arranged on the sliding block, a first return spring is fixedly arranged on the force plate, and the force plate is arranged in cooperation with the electromagnetic suction cup.

[0008] Furthermore, a support plate is fixedly provided on the rotating plate, and the support plate is symmetrically arranged about the central plane of the rotating plate. A positioning pin is slidably provided on the support plate, and a pressure block is fixedly provided at one end of the positioning pin. The pressure block is wedge-shaped, and the pressure block is matched with the pressure block. A second return spring is provided on the positioning pin, and the second return spring is provided between the pressure block and the support plate.

[0009] Furthermore, any group of the follow-up clamping device also includes a mounting cylinder, which is in the shape of a hollow cylinder with an open end, and is rotatably mounted on the rotating plate. A positioning hole is penetrated through the side wall of the mounting cylinder, and there are multiple groups of positioning holes. A driving screw is rotatably mounted on the inner bottom wall of the mounting cylinder, and there are multiple groups of driving screws. The multiple groups of driving screws are evenly arranged on the inner bottom wall of the mounting cylinder, and the clamping plate is threadedly mounted on the driving screw, and the clamping plate penetrates through the bottom wall of the mounting cylinder, and the clamping plate is slidably mounted on the bottom wall of the mounting cylinder. A driven bevel gear is fixedly mounted on any group of the driving screws.

[0010] Furthermore, a positioning plate is fixedly provided on the inner bottom wall of the mounting cylinder, a force-bearing shaft is rotatably provided on the positioning plate, the force-bearing shaft is coaxially provided with the rotating shaft, an active bevel gear is fixedly provided on one end of the force-bearing shaft, the active bevel gear is meshingly connected with multiple groups of driven bevel gears on the driving screw, a driven rotating rod is fixedly provided on the other end of the force-bearing shaft, and the driven rotating rod is provided in a rectangular shape.

[0011] Further, the synchronous drive device includes a driving motor, a first driven spur gear and a second driven spur gear, the driving motor is fixedly arranged on the mounting box, the driving gear is fixedly arranged on the power output shaft of the driving motor, the second driven spur gear is rotatably arranged on the mounting plate on the sliding plate, the second driven spur gear is connected to the rotating plate on the sliding plate by power, the first driven spur gear is rotatably arranged on the mounting plate on the fixed plate, and the first driven spur gear is connected to the rotating plate on the fixed plate by power; A first relay gear is rotatably arranged on the mounting plate on the fixed plate, and the first relay gear is respectively meshed and transmitted with the driving gear and the first driven spur gear; a second relay gear and a third relay gear are rotatably arranged on the mounting plate on the sliding plate, and the second relay gear is meshed and connected with the third relay gear, and the second relay gear is meshed and connected with the second driven spur gear.

[0012] Further, the synchronous drive device also includes a first relay shaft and a second relay shaft, the first relay shaft is rotatably arranged in the installation box, a first driving spur gear is fixedly arranged at one end of the first relay shaft, the first driving spur gear is meshingly connected with the driving gear, the other end of the first relay shaft is a hollow shaft, the second relay shaft is rotatably arranged on the bottom surface of the sliding plate, a second driving spur gear is fixedly arranged at one end of the second relay shaft, the second driving spur gear is meshingly arranged with the third relay gear, a relay rod is fixedly arranged on the other end of the second relay shaft, the relay rod is arranged in a rectangular shape, and the relay rod is slidably arranged in the first relay shaft.

[0013] Furthermore, the adjustment support device is provided with two groups, and the two groups of adjustment support devices have the same structure. Any group of the adjustment support device includes an adjustment plate, and the adjustment plate is slidably fitted on the linear guide rail. A guide rod is penetrated through the adjustment plate, and the guide rod is symmetrically arranged about the center plane of the adjustment plate. A lifting plate is fixedly arranged on the upper end of the guide rod, and a screw elevator is fixedly arranged on the adjustment plate. The screw on the screw elevator is fixedly connected to the lifting plate, and a support roller is fixedly arranged on the upper wall of the lifting plate, and the support roller is symmetrically arranged about the center plane of the lifting plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) The synchronous driving device provided in the present invention can synchronously transmit the driving force to the two sets of follower clamping devices, so that the two sets of follower clamping devices drive the clamped cylinders to rotate synchronously, thereby preventing the cylinders from moving relative to each other, omitting the spot welding fixation process and improving the processing efficiency; (2) The follow-up clamping device provided in the present invention can convert the rotational driving force into the clamping force, and after ensuring that the set clamping force is reached, the clamping force can be converted back into the rotational driving force, thereby improving the processing efficiency while ensuring the clamping effect, having a simple structure and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is an overall cross-sectional view of an embodiment of the present invention; Figure 3 It is a schematic diagram of the overall structure of the follow-up clamping device according to an embodiment of the present invention; Figure 4 A cross-sectional view of a follow-up clamping device according to an embodiment of the present invention; Figure 5 Schematic diagram of the overall structure of the sliding block according to an embodiment of the present invention.

[0016] Among them, 1. Install the box, 2. Adjust the support device, 3. Synchronous drive device, 4. Follow-up clamping device, 5. Sliding block, 6. Clamping plate, 7. Linear guide, 8. Sliding plate, 9. Mounting plate, 10. Adjustment cylinder, 11. Fixed plate, 12. Rotating plate, 13. Electromagnetic suction cup, 14. Rotating axis, 15. Active rotating rod, 16. Pressure block, 17. Force plate, 18. First reset spring, 19. Support plate, 20. Positioning pin, 21. Pressure block, 22. Second reset spring, 23. Mounting cylinder, 24. Positioning hole, 25. Drive screw, 2 6. Driven bevel gear, 27. Positioning plate, 28. Force shaft, 29. Active bevel gear, 30. Driven rotating rod, 31. Driving motor, 32. First driven spur gear, 33. Second driven spur gear, 34. Driving gear, 35. First relay gear, 36. Second relay gear, 37. Third relay gear, 38. First relay shaft, 39. Second relay shaft, 40. First active spur gear, 41. Second active spur gear, 42. Relay rod, 43. Adjustment plate, 44. Guide rod, 45. Lifting plate, 46. Screw lift, 47. Support roller. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection.

[0018] In the description of the embodiments, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments.

[0019] In the manufacturing process of chemical pressure vessels, since it is difficult for existing pressure vessel processing equipment to achieve synchronous rotation of welded cylinders, the cylinders of the chemical pressure vessels are usually fixed and spliced ​​first. After determining that the concentricity of each cylinder meets the requirements, spot welding is performed to fix the connection, and then the pressure vessel is rotationally welded. The overall processing process is cumbersome, which reduces the manufacturing efficiency of the chemical pressure vessel. At the same time, due to the heavy weight of the pressure vessel, it is inconvenient to clamp and fix.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an embodiment of the present invention provides a welding device for a chemical pressure vessel, including a mounting box 1, an adjustment support device 2, a synchronous drive device 3 and a follower clamping device 4.

[0021] Among them, the adjustment support device 2 is slidably set on the installation box 1, and is used for supporting the cylinder and adjusting the position angle. By adjusting the support device 2, the position and angle of the cylinder to be spliced ​​can be adjusted to ensure the concentricity requirements after welding and improve the welding accuracy. At the same time, it can play a supporting and positioning role in the welding process to ensure stability during the processing process.

[0022] The synchronous drive device 3 is fixedly arranged on the mounting box 1, and is used for synchronous rotational drive of the cylinder to be welded. The driving force can be synchronously transmitted to the two sets of follow-up clamping devices 4, so that the two sets of follow-up clamping devices 4 drive the clamped cylinder to rotate synchronously, avoiding relative movement of the cylinder, omitting the spot welding fixation process, and improving the processing efficiency.

[0023] Two groups of follow-up clamping devices 4 are provided, and the two groups of follow-up clamping devices 4 have the same structure. The two groups of follow-up clamping devices 4 are rotatably set on the installation box 1 respectively, and are used for clamping and positioning the cylinder. The rotational driving force can be converted into the clamping force, and after ensuring that the set clamping force is reached, the clamping force can be converted into the rotational driving force again. While ensuring the clamping effect, the processing efficiency is improved. The structure is simple and practical. Any group of follow-up clamping devices 4 includes a sliding block 5 and a clamping plate 6. The sliding block 5 is used to control the conversion between the clamping action and the rotation action. The sliding block 5 is used to transmit the driving force. By controlling the position of the sliding block 5, the action mode of the driving force can be changed, and then the switching of the clamping and rotation actions can be controlled. The clamping plate is used to clamp and position the cylinder. The position of the clamping plate is adjusted by the driving force to clamp and position the cylinder.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the mounting box 1 is arranged in the shape of a hollow rectangular parallelepiped with an opening at the upper end, a linear guide rail 7 is fixedly arranged on the mounting box 1, and the linear guide rail 7 is symmetrically arranged about the central plane of the mounting box 1, a sliding plate 8 is slidably arranged on the linear guide rail 7, a mounting plate 9 is fixedly arranged on the sliding plate 8, and a group of follow-up clamping devices 4 are rotatably arranged on the mounting plate 9 on the sliding plate 8, an adjusting cylinder 10 is fixedly arranged on the mounting box 1, and the protruding end of the adjusting cylinder 10 is fixedly arranged on the sliding plate 8, and the position of the sliding plate 8 on the mounting box 1 can be adjusted by adjusting the cylinder 10, and then the position of the clamped cylinder can be adjusted, a fixing plate 11 is fixedly arranged on the mounting box 1, and the fixing plate 11 is arranged on one end of the mounting box 1, a fixing plate 9 is fixedly arranged on the fixing plate 11, and another group of follow-up clamping devices 4 are rotatably arranged on the mounting plate 9 on the fixing plate 11.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in some embodiments, any group of follow-up clamping devices 4 also includes a rotating plate 12, which is rotatably arranged on the mounting plate 9, and an electromagnetic suction cup 13 is fixedly arranged on the rotating plate 12, and a rotating shaft 14 is fixedly arranged on the rotating plate 12. An active rotating rod 15 is fixedly arranged on one end of the rotating shaft 14, and the active rotating rod 15 is arranged in a rectangular parallelepiped shape. The sliding block 5 is slidably arranged on the active rotating rod 15, and a pressure block 16 is fixedly arranged on the sliding block 5. The pressure block 16 is arranged in a wedge shape, and the pressure block 16 is about the sliding block. The center plane of block 5 is symmetrically arranged, a force plate 17 is fixedly arranged on the sliding block 5, a first return spring 18 is fixedly arranged on the force plate 17, the force plate 17 is matched with the electromagnetic suction cup 13, when the electromagnetic suction cup 13 is opened, under the action of electromagnetic force, the force plate 17 overcomes the elastic force of the first return spring 18, and drives the sliding block 5 to slide in the direction of the electromagnetic suction cup 13, when the electromagnetic suction cup 13 is closed, under the action of the elastic force of the first return spring 18, the force plate 17 drives the sliding block 5 to slide in the direction away from the electromagnetic suction cup 13.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, a support plate 19 is fixedly provided on the rotating plate 12, and the support plate 19 is symmetrically arranged about the central plane of the rotating plate 12. A positioning pin 20 is slidably provided on the support plate 19, and a pressure block 21 is fixedly provided at one end of the positioning pin 20. The pressure block 21 is wedge-shaped, and the pressure block 21 is matched with the pressure block 16. A second return spring 22 is provided on the positioning pin 20, and the second return spring 22 is arranged between the pressure block 21 and the support plate 19. Under the action of the second return spring 22, the pressure block 21 is always pressed against the pressure block 16. When the pressure block 16 moves toward the direction of the electromagnetic suction cup 13 driven by the sliding block 5, the pressure block 21 is squeezed by the pressure block 16, and the positioning pin 20 is driven to slide in the direction away from the pressure block 16. When the pressure block 16 moves in the direction away from the electromagnetic suction cup 13 driven by the sliding block 5, the positioning pin 20 is driven to slide in the direction of the pressure block 16 under the elastic force of the second return spring 22.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in some embodiments, any group of follower clamping devices 4 also includes a mounting cylinder 23, which is in the shape of a hollow cylinder with one end open, and is rotatably set on the rotating plate 12. A positioning hole 24 is penetrated on the side wall of the mounting cylinder 23, and there are multiple groups of positioning holes 24. The positioning holes 24 are matched with the positioning pin 20. A driving screw 25 is rotatably set on the inner bottom wall of the mounting cylinder 23, and there are multiple groups of driving screws 25. The multiple groups of driving screws 25 are evenly set on the inner bottom wall of the mounting cylinder 23. The clamping plate 6 is threadedly matched on the driving screw 25, and the clamping plate 6 is set through the bottom wall of the mounting cylinder 23. The clamping plate 6 is slidably set on the bottom wall of the mounting cylinder 23. A driven bevel gear 26 is fixedly set on any group of driving screws 25.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, a positioning plate 27 is fixedly provided on the inner bottom wall of the mounting cylinder 23, a force-bearing shaft 28 is rotatably provided on the positioning plate 27, the force-bearing shaft 28 is coaxially provided with the rotating shaft 14, a driving bevel gear 29 is fixedly provided at one end of the force-bearing shaft 28, the driving bevel gear 29 is meshingly connected with the driven bevel gears 26 on the multiple sets of driving screws 25, a driven rotating rod 30 is fixedly provided on the other end of the force-bearing shaft 28, and the driven rotating rod 30 is provided in a rectangular shape.

[0029] When the sliding block 5 slides in the direction of the force-bearing shaft 28 under the elastic force of the first return spring 18, as the rotating plate 12 rotates, the driven rotating rod 30 will cooperate to enter the sliding block 5. At this time, as the rotating plate 12 continues to rotate, since the cylinder to be welded is placed on the clamping plate 6, under the action of the gravity of the cylinder, the mounting cylinder 23 will not rotate with the rotating plate 12, so it will drive the driving screw 25 to rotate, so that the clamping plate 6 clamps the cylinder. After the cylinder is fixed, the driving sliding block 5 slides in the direction of the electromagnetic suction cup 13, and finally the sliding block 5 is separated from the driven rotating rod 30. Since the driving screw 25 has a self-locking function, the clamping force on the cylinder can be maintained. At the same time, as the sliding block 5 moves, the positioning pin 20 will be squeezed outward. When the rotating plate 12 rotates again, it drives the positioning pin 20 to rotate, and the positioning pin 20 will eventually cooperate to be inserted into the positioning hole 24, driving the mounting cylinder 23 to rotate, and then driving the clamped cylinder to rotate.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the synchronous drive device 3 includes a drive motor 31, a first driven spur gear 32 and a second driven spur gear 33. The drive motor 31 is fixedly arranged on the mounting box 1, and a drive gear 34 is fixedly arranged on the power output shaft of the drive motor 31. The second driven spur gear 33 is rotatably arranged on the mounting plate 9 on the sliding plate 8, and the second driven spur gear 33 is dynamically connected to the rotating plate 12 on the sliding plate 8. The first driven spur gear 32 is rotatably arranged on the mounting plate 9 on the fixed plate 11, and the first driven spur gear 32 is dynamically connected to the rotating plate 12 on the fixed plate 11.

[0031] A first relay gear 35 is rotatably provided on the mounting plate 9 on the fixed plate 11, and the first relay gear 35 is respectively meshed and transmitted with the driving gear 34 and the first driven spur gear 32, and the follower clamping device 4 on the fixed plate 11 is driven by the driving motor 31, and a second relay gear 36 and a third relay gear 37 are rotatably provided on the mounting plate 9 on the sliding plate 8, and the second relay gear 36 is meshed and connected with the third relay gear 37, and the second relay gear 36 is meshed and connected with the second driven spur gear 33.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the synchronous drive device 3 further includes a first relay shaft 38 and a second relay shaft 39, the first relay shaft 38 is rotatably arranged in the installation box 1, one end of the first relay shaft 38 is fixedly provided with a first active spur gear 40, the first active spur gear 40 is meshingly connected with the driving gear 34, the other end of the first relay shaft 38 is a hollow shaft, the cross section of the hollow position is a square, the second relay shaft 39 is rotatably arranged on the bottom surface of the sliding plate 8, one end of the second relay shaft 39 is fixedly provided with a second active spur gear 41, the second active spur gear 41 is meshed with the third relay gear 37, and a relay rod 42 is fixedly arranged on the other end of the second relay shaft 39. The relay rod 42 is arranged in a rectangular shape, and the relay rod 42 is slidably arranged in the first relay shaft 38. Through the transmission connection of the above transmission parts, the driving motor 31 can synchronously drive the two groups of follow-up clamping devices 4, and the movement of the sliding plate 8 will drive the second relay shaft 39 to move synchronously. Since the relay rod 42 is connected to the first relay shaft 38 by sliding power, the movement of the sliding plate 8 will not affect the synchronous transmission of the two groups of follow-up clamping devices 4.

[0033] like Figure 1 and Figure 2As shown, in some embodiments, two groups of adjustment support devices 2 are provided, and the two groups of adjustment support devices 2 have the same structure. Any group of adjustment support devices 2 includes an adjustment plate 43, and the adjustment plate 43 is slidably fitted on the linear guide rail 7. A guide rod 44 is penetrated by the adjustment plate 43, and the guide rod 44 is symmetrically arranged about the central plane of the adjustment plate 43. A lifting plate 45 is fixedly arranged on the upper end of the guide rod 44, and a screw lifter 46 is fixedly arranged on the adjustment plate 43. The screw on the screw lifter 46 is fixedly connected to the lifting plate 45. A support roller 47 is fixedly arranged on the upper wall of the lifting plate 45, and the support roller 47 is symmetrically arranged about the central plane of the lifting plate 45. The support roller 47 can support the cylinder to be welded, and by adjusting the height of the support roller 47, the height and angle of the cylinder can be adjusted, so that the axis position of the cylinder to be welded can be quickly adjusted to ensure its concentricity requirements.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding device for chemical pressure vessels, characterized in that: It comprises an installation box (1), an adjustment support device (2), a synchronous drive device (3) and a follower clamping device (4); The adjustment support device (2) is slidably arranged on the installation box (1) and is used for supporting the cylinder and adjusting the position angle; the synchronous drive device (3) is fixedly arranged on the installation box (1) and is used for synchronous rotation drive of the cylinder to be welded; The follow-up clamping device (4) is provided in two groups. The two groups of the follow-up clamping device (4) have the same structure. The two groups of the follow-up clamping device (4) are respectively rotatably arranged on the installation box (1) and are used for clamping and positioning the cylinder. Any group of the follow-up clamping device (4) includes a sliding block (5) and a clamping plate (6). The sliding block (5) is used to control the conversion between the clamping action and the rotation action, and the clamping plate is used to clamp and position the cylinder.

2. The welding device for chemical pressure vessels according to claim 1, characterized in that: The installation box (1) is arranged in the shape of a hollow rectangular parallelepiped with an opening at the upper end. A linear guide rail (7) is fixedly arranged on the installation box (1). The linear guide rail (7) is symmetrically arranged about the central plane of the installation box (1). A sliding plate (8) is slidably arranged on the linear guide rail (7). A mounting plate (9) is fixedly arranged on the sliding plate (8). A group of follower clamping devices (4) is rotatably arranged on the mounting plate (9) on the sliding plate (8). An adjustment cylinder (10) is fixedly arranged on the installation box (1). The protruding end of the adjustment cylinder (10) is fixedly arranged on the sliding plate (8). A fixed plate (11) is fixedly arranged on the installation box (1). The fixed plate (11) is arranged on one end of the installation box (1). A mounting plate (9) is fixedly arranged on the fixed plate (11). Another group of follower clamping devices (4) is rotatably arranged on the mounting plate (9) on the fixed plate (11).

3. The welding device for chemical pressure vessels according to claim 2, characterized in that: Any group of the follow-up clamping devices (4) further comprises a rotating plate (12), the rotating plate (12) being rotatably arranged on the mounting plate (9), an electromagnetic suction cup (13) being fixedly arranged on the rotating plate (12), a rotating shaft (14) being fixedly arranged on the rotating plate (12), an active rotating rod (15) being fixedly arranged on one end of the rotating shaft (14), the active rotating rod (15) being arranged in a rectangular parallelepiped shape, the sliding block (5) being slidably arranged on the active rotating rod (15), a pressure block (16) being fixedly arranged on the sliding block (5), the pressure block (16) being arranged in a wedge shape, the pressure block (16) being symmetrically arranged about the central plane of the sliding block (5), a force plate (17) being fixedly arranged on the sliding block (5), a first return spring (18) being fixedly arranged on the force plate (17), the force plate (17) being arranged in cooperation with the electromagnetic suction cup (13).

4. The welding device for chemical pressure vessels according to claim 3, characterized in that: A support plate (19) is fixedly arranged on the rotating plate (12), and the support plate (19) is symmetrically arranged about the central plane of the rotating plate (12). A positioning pin (20) is slidably arranged on the support plate (19), and a pressure block (21) is fixedly arranged at one end of the positioning pin (20). The pressure block (21) is arranged in a wedge shape, and the pressure block (21) is arranged in cooperation with the pressure block (16). A second return spring (22) is arranged on the positioning pin (20), and the second return spring (22) is arranged between the pressure block (21) and the support plate (19).

5. The welding device for chemical pressure vessels according to claim 4, characterized in that: Any group of the follower clamping device (4) further comprises a mounting cylinder (23), the mounting cylinder (23) being in the shape of a hollow cylinder with one end open, the mounting cylinder (23) being rotatably mounted on the rotating plate (12), a positioning hole (24) being penetrated through the side wall of the mounting cylinder (23), and a plurality of positioning holes (24) being provided, a driving screw (25) being rotatably mounted on the inner bottom wall of the mounting cylinder (23), a plurality of driving screws (25) being provided, and a plurality of driving screws (25) being evenly disposed on the inner bottom wall of the mounting cylinder (23), the clamping plate (6) being threadedly mounted on the driving screw (25), the clamping plate (6) being penetrated through the bottom wall of the mounting cylinder (23), and the clamping plate (6) being slidably mounted on the bottom wall of the mounting cylinder (23), and a driven bevel gear (26) being fixedly disposed on any group of the driving screws (25).

6. The welding device for chemical pressure vessels according to claim 5, characterized in that: A positioning plate (27) is fixedly provided on the inner bottom wall of the mounting cylinder (23), a force-bearing shaft (28) is rotatably provided on the positioning plate (27), the force-bearing shaft (28) is coaxially provided with the rotating shaft (14), a driving bevel gear (29) is fixedly provided on one end of the force-bearing shaft (28), the driving bevel gear (29) is meshingly connected with a plurality of groups of driven bevel gears (26) on the driving screw rods (25), and a driven rotating rod (30) is fixedly provided on the other end of the force-bearing shaft (28), the driven rotating rod (30) being provided in a rectangular parallelepiped shape.

7. The welding device for chemical pressure vessels according to claim 6, characterized in that: The synchronous drive device (3) comprises a drive motor (31), a first driven spur gear (32) and a second driven spur gear (33); the drive motor (31) is fixedly arranged on the mounting box (1); a drive gear (34) is fixedly arranged on the power output shaft of the drive motor (31); the second driven spur gear (33) is rotatably arranged on a mounting plate (9) on the sliding plate (8); the second driven spur gear (33) is power-connected to a rotating plate (12) on the sliding plate (8); the first driven spur gear (32) is rotatably arranged on a mounting plate (9) on the fixed plate (11); the first driven spur gear (32) is power-connected to a rotating plate (12) on the fixed plate (11).

8. The welding device for chemical pressure vessels according to claim 7, characterized in that: A first relay gear (35) is rotatably arranged on the mounting plate (9) on the fixed plate (11), and the first relay gear (35) is respectively meshed with the driving gear (34) and the first driven spur gear (32) for transmission. A second relay gear (36) and a third relay gear (37) are rotatably arranged on the mounting plate (9) on the sliding plate (8), and the second relay gear (36) is meshed with the third relay gear (37), and the second relay gear (36) is meshed with the second driven spur gear (33).

9. The welding device for chemical pressure vessels according to claim 8, characterized in that: The synchronous drive device (3) further comprises a first relay shaft (38) and a second relay shaft (39); the first relay shaft (38) is rotatably arranged in the mounting box (1); a first driving spur gear (40) is fixedly arranged at one end of the first relay shaft (38); the first driving spur gear (40) is meshingly connected with the driving gear (34); the other end of the first relay shaft (38) is a hollow shaft; the second relay shaft (39) is rotatably arranged on the bottom surface of the sliding plate (8); a second driving spur gear (41) is fixedly arranged at one end of the second relay shaft (39); the second driving spur gear (41) is meshingly arranged with the third relay gear (37); a relay rod (42) is fixedly arranged at the other end of the second relay shaft (39); the relay rod (42) is arranged in a rectangular parallelepiped shape; the relay rod (42) is slidably arranged in the first relay shaft (38).

10. The welding device for chemical pressure vessels according to claim 9, characterized in that: The adjustment support device (2) is provided in two groups, and the two groups of the adjustment support device (2) have the same structure. Any one group of the adjustment support device (2) comprises an adjustment plate (43), the adjustment plate (43) is slidably arranged on the linear guide rail (7), a guide rod (44) is penetrated by the adjustment plate (43), the guide rod (44) is symmetrically arranged about the central plane of the adjustment plate (43), a lifting plate (45) is fixedly arranged on the upper end of the guide rod (44), a screw lift (46) is fixedly arranged on the adjustment plate (43), the screw on the screw lift (46) is fixedly connected to the lifting plate (45), and a support roller (47) is fixedly arranged on the upper wall of the lifting plate (45), and the support roller (47) is symmetrically arranged about the central plane of the lifting plate (45).

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