A vertical ring joint welding device for pressure vessels

Abstract

The present application relates to the technical field of welding, and provides a vertical girth welding device for pressure vessels, which comprises a platform, a cross is fixedly connected to the top left side of the platform, a rotating disc and a rotating rod are connected to the bottom end of the platform through a driving mechanism, the bottom end of the rotating disc is rotationally connected to the top end of the platform, the outer wall of the rotating rod is rotationally connected to the inner wall of the cross, a bidirectional screw rod is connected to the top side of the outer wall of the rotating rod through a steering assembly, the outer wall of the bidirectional screw rod is rotationally connected to the inner wall of the cross, the outer wall of the bidirectional screw rod is connected to a moving sleeve one and a moving sleeve two through a threaded sleeve, and the moving sleeve one is arranged on the front side of the outer wall of the bidirectional screw rod through the threaded sleeve. The automatic opening and closing of the clamping sleeve are realized by the motor driving the bidirectional screw rod, the horizontal clamping and vertical limiting three-dimensional fixing structure is formed by the cooperation of the electric push rod and the rotating sleeve, manual adjustment is not needed, the pressure vessels with different diameters can be quickly adapted, and the clamping efficiency is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a vertical circumferential welder for pressure vessels. Background Technology

[0002] In the fields of petrochemicals, energy and power, and special equipment manufacturing, pressure vessels are key equipment for storing and transporting high-pressure media, and their welding quality directly affects the safety and reliability of equipment operation. Vertical circumferential welding is a core process in pressure vessel manufacturing, which requires ensuring that the weld has good sealing properties and mechanical properties. Therefore, it places extremely high demands on the automation level, clamping stability, and welding precision of the welding equipment.

[0003] In existing technologies, traditional pressure vessel circumferential welding devices generally employ manual or semi-manual clamping structures. During clamping, the position of the clamps needs to be manually adjusted to accommodate containers of different diameters. This is not only cumbersome and time-consuming, but also prone to errors in manual positioning, leading to container misalignment and subsequent circumferential seam displacement during welding. Furthermore, traditional devices often use a single horizontal clamping method, lacking a vertical limiting structure. When the container is subjected to the reaction force of the welding torch or rotational inertia during the rotating welding process, it is prone to vertical swaying, severely affecting the weld formation quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a vertical circumferential weld device for pressure vessels, which solves the problem of needing to manually adjust the position of the clamps during the clamping process to adapt to containers of different diameters.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vertical circumferential welder for pressure vessels, comprising: The platform has a cross fixedly connected to its top left side. A turntable and a rotating rod are connected to the bottom of the platform via a drive mechanism. The bottom of the turntable is rotatably connected to the top of the platform. The outer wall of the rotating rod is rotatably connected to the inner wall of the cross. A bidirectional lead screw is connected to the top side of the outer wall of the rotating rod via a steering assembly. The outer wall of the bidirectional lead screw is rotatably connected to the inner wall of the cross. A movable sleeve one and a movable sleeve two are connected to the outer wall of the bidirectional lead screw via threaded sleeves. The movable sleeve one is set on the front side of the outer wall of the bidirectional lead screw via a threaded sleeve, and the movable sleeve two is set on the rear side of the outer wall of the bidirectional lead screw via a threaded sleeve. The right ends of both the movable sleeve one and the movable sleeve two are respectively connected to a retaining sleeve one and a retaining sleeve two via support assemblies. A fixing assembly is provided at the top of the cross. A support frame is fixedly connected at its bottom to the top of the platform. A base plate is rotatably connected to the top of the support frame. A robotic arm is fixedly connected to the top of the base plate. A welding torch is fixedly connected to the left end of the robotic arm. A connecting rod one is fixedly connected to the front side of the left end of the robotic arm. A connecting rod two is rotatably connected to the front end of the connecting rod one. A frosting roller is fixedly connected to the left end of the connecting rod two. The left end of the connecting rod one is connected to the connecting rod two through an elastic component.

[0006] Preferably, the driving mechanism includes a motor located at the bottom of the platform. The motor is mounted at the bottom of the platform via a fixing frame. The driving end of the motor is fixedly connected to the bottom of the turntable. A first synchronous pulley is fixedly connected to the driving end of the motor. A second synchronous pulley is connected to the outer wall of the first synchronous pulley via a synchronous belt. A support shaft is fixedly connected to the inner wall of the second synchronous pulley. A rotating rod is connected to the top side of the outer wall of the support shaft via a connecting transmission assembly. The top of the support shaft is rotatably connected to the bottom end of the rotating rod.

[0007] Preferably, the connecting transmission assembly includes a connecting sleeve located on the outer wall of the support shaft, the inner wall of the connecting sleeve being slidably connected to the outer wall of the support shaft, and both the connecting sleeve and the outer wall of the rotating rod being fixedly connected to an electromagnetic clutch.

[0008] Preferably, the steering assembly includes a bevel gear one located on the top side of the outer wall of the steering rod, the top of the bevel gear one being meshed with a bevel gear two, and the inner wall of the bevel gear two being fixedly connected to the outer wall of the bidirectional lead screw.

[0009] Preferably, the elastic component includes a second connecting block located at the left end of the first connecting rod. The second connecting block is rotatably connected to the left end of the first connecting rod. A second fixing sleeve is fixedly connected to the rear end of the second connecting rod. The rear end of the second fixing sleeve is rotatably connected to the first connecting block. The rear end of the first connecting block is connected to the second connecting block via a spring. One end of the spring is connected to the left end of the second connecting block, and the other end of the spring is connected to the rear end of the first connecting block.

[0010] Preferably, the fixing component includes an electric push rod located at the top of the cross, a movable plate fixedly connected to the bottom end of the electric push rod, the left end of the movable plate slidably connected to the right end of the cross, and a rotating sleeve rotatably connected to the bottom end of the movable plate.

[0011] Preferably, the support assembly includes a connecting frame located at the right end of the movable sleeve one and the movable sleeve two. A fixing rod one is fixedly connected to the right end of the front connecting frame, and a fixing rod two is fixedly connected to the right end of the rear connecting frame. The top and bottom ends of the fixing rod one are fixedly connected to the adjacent ends of the two sleeves one, and the top and bottom ends of the fixing rod two are fixedly connected to the adjacent ends of the two sleeves two.

[0012] Preferably, both the first and second sleeves are fixedly connected to a first fixing sleeve, and the inner walls of the multiple first fixing sleeves are rotatably connected to rollers.

[0013] Preferably, a transformer is fixedly connected to the rear side of the top of the platform, and the welding gun is connected to the transformer via a power transmission line.

[0014] A welding procedure for a vertical circumferential welder for pressure vessels includes the following steps: Step 1: Start the motor to drive the bidirectional lead screw to rotate via the synchronous belt, which in turn drives the first and second movable sleeves to unfold the first and second clamping sleeves. Step 2: Place the pressure vessel between clamping sleeve 1 and clamping sleeve 2, then start the electric push rod to push the moving plate down, and rotate the sleeve to help fix it; Step 3: Move the welding gun to the circumferential seam using the robotic arm, then link one and link two drive the abrasive roller, stretching the spring until the welding gun touches the container; Step 4: Cut off the power to the rotating rod through the electromagnetic clutch, so that the motor only drives the turntable to rotate the container, the roller assists in smooth rotation, and the abrasive roller polishes the circumferential seam; Step 5: Start the welding torch to weld the pressure vessel.

[0015] Working principle: The motor is started, and the electromagnetic clutch rotates via the synchronous belt. When the electromagnetic clutch rotates, it drives bevel gear one to rotate as well. The meshing of bevel gear one and bevel gear two drives the double-acting screw to rotate. The rotation of the double-acting screw causes the two moving sleeves to move in opposite directions, which in turn causes ferrule one and ferrule two to move in opposite directions via the connecting frame. Then, the two half-pressure vessels to be welded are placed between ferrule one and ferrule two. The motor is then started, causing it to rotate the electromagnetic clutch in the reverse direction, thus engaging bevel gear one, bevel gear two, and the double-acting screw. Under the action of the mechanism, clamping sleeves one and two rotate in opposite directions, thereby clamping and fixing the pressure vessel. Then, the electric push rod is activated to move the moving plate downwards, further securing the pressure vessel. At this point, the pressure vessel is clamped above the turntable and below the rotating sleeve. Next, the robotic arm moves the welding torch to the gap between the two pressure vessels. During this movement, the welding torch moves via connecting rods one and two, driving the abrasive roller. As the welding torch approaches the pressure vessel, the angle between connecting rods one and two increases, causing the roller to stretch until it touches the pressure vessel and stops. Then, the electromagnetic clutch stops the motor from providing driving force to the rotating rod. The motor is then restarted. Due to the electromagnetic clutch, the motor drives the pressure vessel to rotate between the turntable and the rotating sleeve. The rollers inside the first and second sleeves further smooth the rotation of the pressure vessel. While the pressure vessel rotates, the abrasive roller grinds the seam of the pressure vessel to be welded. The welding torch is then activated to weld the pressure vessel. After welding, the robotic arm moves the welding torch and connecting rod two to one side. At this point, the spring tightens, causing connecting rod one and... Once the angle between the two connecting rods is restored, the electric push rod is activated to move the moving plate upward, releasing the pressure vessel's limit. Then, the electromagnetic clutch is controlled to connect the connecting sleeve and the rotating rod. At this point, the starting motor can drive the support shaft to rotate via synchronous pulley one, synchronous belt, and synchronous pulley two. The support shaft drives the connecting sleeve to rotate, which in turn drives the bidirectional lead screw to rotate via the rotating rod, bevel gear one, and bevel gear two. Under the action of moving sleeve one and moving sleeve two, clamping sleeve one and clamping sleeve two can move in opposite directions, releasing the clamping of the pressure vessel, allowing the welded pressure vessel to be removed.

[0016] This invention provides a vertical circumferential welder for pressure vessels. It offers the following advantages: 1. This invention achieves automatic opening and closing of the ferrule by driving a bidirectional lead screw with a motor. Together with the electric push rod and the rotating sleeve, it forms a three-dimensional fixing structure with horizontal clamping and vertical limiting. No manual adjustment is required, and it can be quickly adapted to pressure vessels of different diameters, significantly improving clamping efficiency.

[0017] 2. In this invention, when the robotic arm moves the welding torch, the elastic linkage mechanism causes the abrasive roller to simultaneously contact the circumferential seam, completing the continuous operation of grinding the oxide layer before welding during the container's rotation. Compared to the traditional process of grinding before welding, this reduces the time between processes, and the grinding force is automatically adjusted by the spring, avoiding weld defects caused by uneven grinding force during manual grinding.

[0018] 3. The electromagnetic clutch of this invention can cut off the power to the rotating rod in real time, allowing the motor to drive the turntable to rotate for welding only, reducing energy consumption from unnecessary components. Compared with traditional all-time transmission solutions, it can effectively reduce power consumption, while the roller support structure reduces the resistance torque of container rotation, extending the service life of the equipment. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the motor structure of the present invention; Figure 3 This is a schematic diagram of the bevel gear structure of the present invention; Figure 4 This is a schematic diagram of the electromagnetic clutch structure of the present invention; Figure 5 This is a schematic diagram of the movable sleeve structure of the present invention; Figure 6 This is a schematic diagram of the roller structure of the present invention; Figure 7 This is a schematic diagram of the welding torch structure of the present invention; Figure 8 This is a schematic diagram of the spring structure of the present invention.

[0020] The components are as follows: 1. Platform; 2. Motor; 3. Turntable; 4. Synchronous pulley one; 5. Synchronous belt; 6. Synchronous pulley two; 7. Support shaft; 8. Connecting sleeve; 9. Rotating rod; 10. Electromagnetic clutch; 11. Bevel gear one; 12. Bevel gear two; 13. Double-acting screw; 14. Moving sleeve one; 15. Moving sleeve two; 16. Connecting frame; 17. Fixed rod one; 18. Sleeve one; 19. Fixed rod two; 20. Sleeve two; 21. Fixed sleeve one; 22. Roller; 23. Cross; 24. Electric push rod; 25. Moving plate; 26. Rotating sleeve; 27. Support frame; 28. Base plate; 29. ​​Robotic arm; 30. Welding torch; 31. Connecting rod one; 32. Connecting rod two; 33. Frosting roller; 34. Spring; 35. Fixed sleeve two; 36. Connecting block one; 37. Connecting block two. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example:

[0023] Please see the appendix Figure 1 -Appendix Figure 8 This invention provides a vertical circumferential welder for pressure vessels, comprising: Platform 1 has a cross 23 fixedly connected to its top left side. At the bottom of platform 1, a turntable 3 and a rotating rod 9 are connected via a motor 2, synchronous pulley 4, synchronous belt 5, synchronous pulley 6, and support shaft 7. The bottom of turntable 3 is rotatably connected to the top of platform 1. The outer wall of rotating rod 9 is rotatably connected to the inner wall of cross 23. A double-acting lead screw 13 is connected to the top side of the outer wall of rotating rod 9 via bevel gear 11 and bevel gear 12. The outer wall of double-acting lead screw 13 is rotatably connected to the inner wall of cross 23. 3. The outer wall is connected by a threaded sleeve to a movable sleeve 14 and a movable sleeve 25. The movable sleeve 14 is set on the front side of the outer wall of the bidirectional screw 13 by a threaded sleeve, and the movable sleeve 25 is set on the rear side of the outer wall of the bidirectional screw 13 by a threaded sleeve. The right ends of the movable sleeve 14 and the movable sleeve 25 are respectively connected to a clamp 18 and a clamp 20 by a connecting frame 16, a fixing rod 17, and a fixing rod 29. The top of the cross 23 is provided with an electric push rod 24, a movable plate 25, and a rotating sleeve 26. Specifically, platform 1 serves as the basic support structure of the device. An emergency stop button is installed around its perimeter; pressing it in case of equipment malfunction cuts off the power to motor 2. A cross 23 is fixed to the top left side to mount transmission components such as the bidirectional lead screw 13. Motor 2 is mounted at the bottom via a mounting bracket, providing a rotational support surface for turntable 3. Its structural design ensures a reasonable spatial layout of each functional module, guaranteeing the coordinated operation of the drive mechanism and welding mechanism. Turntable 3 carries the pressure vessel and rotates under the drive of motor 2. Its top surface, in conjunction with clamp 18 and clamp 20, forms a vessel support surface. An electric push rod 24 is fixed to the top of cross 23, and the inner wall supports the rotating rod 9 and bidirectional lead screw 13, providing an installation base for the steering assembly and the bidirectional lead screw 13. Furthermore, the electric push rod 24 helps to fix the pressure vessel vertically. Support frame 27, the bottom end of support frame 27 is fixedly connected to the top end of platform 1, the top end of support frame 27 is rotatably connected to base plate 28, the top end of base plate 28 is fixedly connected to robotic arm 29, the left end of robotic arm 29 is fixedly connected to welding gun 30, the front side of the left end of robotic arm 29 is fixedly connected to connecting rod 1 31, the front end of connecting rod 1 31 is rotatably connected to connecting rod 2 32, the left end of connecting rod 2 32 is fixedly connected to sanding roller 33, the left end of connecting rod 1 31 is connected to connecting rod 2 32 through connecting block 2 37, fixing sleeve 2 35, connecting block 1 36 and spring 34; Specifically, the robotic arm 29 can rotate on the support frame 27 via the base plate 28, precisely adjusting the distance and angle between the welding torch 30 and the pressure vessel to ensure weld quality and complete circumferential welding. The welding torch 30 is connected to the transformer at the rear of the platform 1 via a power transmission line to provide the welding current. The transformer is equipped with overload protection; when the current exceeds the rated value, the circuit breaker automatically trips.

[0024] The motor 2, located at the bottom of platform 1, is mounted on the bottom of platform 1 via a mounting bracket. The drive end of motor 2 is fixedly connected to the bottom of turntable 3. A synchronous pulley 4 is fixedly connected to the drive end of motor 2. A synchronous pulley 6 is connected to the outer wall of synchronous pulley 4 via a synchronous belt 5. A support shaft 7 is fixedly connected to the inner wall of synchronous pulley 6. A rotating rod 9 is connected to the top side of the outer wall of support shaft 7 via a connecting sleeve 8 and an electromagnetic clutch 10. The top of support shaft 7 is rotatably connected to the bottom end of rotating rod 9. The connecting sleeve 8 is located on the outer wall of support shaft 7. The inner wall of the connecting sleeve 8 is slidably connected to the outer wall of the support shaft 7. Electromagnetic clutches 10 are fixedly connected to the outer walls of both the connecting sleeve 8 and the rotating rod 9. A bevel gear 11 is located on the top side of the outer wall of the rotating rod 9, and a bevel gear 12 is meshed at its top. The inner wall of the bevel gear 12 is fixedly connected to the outer wall of the double-acting screw 13. A connecting block 37 is located at the left end of the connecting rod 31 and is rotatably connected to the left end of the connecting rod 31. A fixing sleeve 35 is fixedly connected to the rear end of the connecting rod 32, and a connecting... Block 1 (36) is connected to Block 2 (37) via a spring (34) at its rear end. One end of the spring (34) is connected to the left end of Block 2 (37), and the other end is connected to the rear end of Block 1 (36). An electric push rod (24) is located at the top of the cross 23. A movable plate (25) is fixedly connected to the bottom of the electric push rod (24). The left end of the movable plate (25) is slidably connected to the right end of the cross 23. A rotating sleeve (26) is rotatably connected to the bottom end of the movable plate (25). Fixed sleeves (21) are fixedly connected to the inner circumference of both the first and second ferrule (18 and 20). Multiple fixed sleeves... Rollers 22 are rotatably connected to the inner wall of sleeve 1 21. The connecting frame 16 located at the right end of movable sleeve 1 14 and movable sleeve 2 15 has a fixed rod 17 fixedly connected to the right end of the front connecting frame 16 and a fixed rod 2 19 fixedly connected to the right end of the rear connecting frame 16. The top and bottom ends of the fixed rod 17 are fixedly connected to the near ends of the two sleeves 1 18. The top and bottom ends of the fixed rod 2 19 are fixedly connected to the near ends of the two sleeves 2 20. A transformer is fixedly connected to the rear of the top of the platform 1. The welding torch 30 is connected to the transformer through a power transmission line. Specifically, motor 2 is the core power source, synchronously driving turntable 3 and transmission system through output shaft. When motor 2 rotates forward, it drives synchronous pulley 6 to rotate through synchronous pulley 4 and synchronous belt 5, thereby driving support shaft 7 and rotating rod 9 to move; when rotating in reverse, it controls the clamping and loosening of the ferrule, realizing bidirectional power output. The roller 22 on the inner circumference of the ferrule is installed through fixed sleeve 21. The surface of roller 22 is chrome-plated. When the container rotates, the roller 22 rolls to reduce frictional resistance, ensure rotational stability, and avoid weld seam deviation caused by shaking during welding. Synchronous pulley 4, synchronous belt 5, and synchronous pulley 6 constitute a belt drive system to transmit the power of motor 2 to support shaft 7. The connecting sleeve 8 is fitted onto the support shaft 7, and the electromagnetic clutch 10 engages and disengages with the rotating rod 9. When the electromagnetic clutch 10 is engaged, the support shaft 7 drives the rotating rod 9 to rotate; when disengaged, the rotating rod 9 stops power input, and only the turntable 3 rotates. The bevel gear 11 and bevel gear 12 at the top of the rotating rod 9 mesh, converting the vertical rotation into the horizontal rotation of the bidirectional lead screw 13. The bidirectional lead screw 13 drives the moving sleeve 14 and the moving sleeve 25 to move relative to or in opposite directions through the positive and negative threads. This, in turn, drives the clamping sleeve 18 and the clamping sleeve 20 to open or close through the connecting frame 16, the fixing rod 17, and the fixing rod 29, thus achieving automatic clamping of the container. The electric push rod 24 at the top of the cross 23 pushes the moving plate 25 downward, causing the rotating sleeve 26 to press against the top of the container, forming an upper and lower clamping structure with the clamping sleeves. The rotating sleeve 26 can rotate with the container, ensuring both stability and not hindering the rotation. It is suitable for pressure vessels of different heights. When the connecting rod 1 31 and connecting rod 2 32 drive the grinding roller 33 to move, the spring 34 forms an elastic connection with the fixed sleeve 2 35 through the connecting block 1 36 and connecting block 2 37, so that the grinding roller 33 adapts to the container surface and completes the pre-treatment of circumferential seam grinding when the container rotates. When the electromagnetic clutch 10 is engaged, the connecting sleeve 8 and the rotating rod 9 are rigidly connected via the electromagnetic clutch 10. At this time, the motor 2 drives the support shaft 7 to rotate via synchronous pulley 4, synchronous belt 5, and synchronous pulley 6. The support shaft 7 drives the rotating rod 9 to rotate via the connecting sleeve 8 and the electromagnetic clutch 10, which in turn transmits power to the double-acting screw 13 via bevel gear 11 and bevel gear 12, realizing the opening and closing of the collet 18 and collet 20. When the electromagnetic clutch 10 is de-energized and disengaged, the connecting sleeve 8 moves downward, canceling its contact with the rotating rod 9. When the motor 2 is driven, it can still drive the support shaft 7 to rotate via synchronous pulley 4, synchronous belt 5, and synchronous pulley 6, but because the electromagnetic clutch 10 is de-energized and disengaged, the support shaft 7 is disconnected. With the power connection to the rotating rod 9, the support shaft 7 only rotates at the bottom of the rotating rod 9 and does not drive the rotating rod 9 to rotate together. The motor 2 only drives the turntable 3 to rotate, causing the container to rotate between the turntable 3 and the rotating sleeve 26. The rotating rod 9 and the bidirectional lead screw 13 stop moving, avoiding unnecessary parts from running and causing energy waste. The electromagnetic clutch 10 achieves efficient switching between clamping and rotating welding modes by transmitting power when it is engaged and cutting off power when it is disengaged. This ensures the convenience of automated clamping, reduces energy consumption through power path optimization, and avoids redundant operation of transmission components.

[0025] A welding procedure for a vertical circumferential welder for pressure vessels includes the following steps: Step 1: Start motor 2 drives bidirectional lead screw 13 to rotate via synchronous belt 5, which in turn drives movable sleeve 14 and movable sleeve 2 15 to unfold clamping sleeve 1 18 and clamping sleeve 2 20. Specifically, the starting motor 2 drives the synchronous pulley 6 to rotate via synchronous pulley 4 and synchronous belt 5. Synchronous pulley 6 is coaxially connected to the support shaft 7, causing the support shaft 7 to rotate at a speed increase of 1:1.5. At this time, the connecting sleeve 8 on the outer wall of the support shaft 7 engages with the rotating rod 9 through the electromagnetic clutch 10, transmitting power to the rotating rod 9. The bevel gear 11 at the top of the rotating rod 9 meshes with the bevel gear 12, converting the vertical rotation into the horizontal rotation of the bidirectional lead screw 13. The pitch of the bidirectional lead screw 13 drives the moving sleeves 14 and 15 to move in opposite directions through the positive and negative threads, and drives the clamping sleeves 18 and 20 to open via the connecting frame 16, the fixed rod 17, and the fixed rod 19.

[0026] Step 2: Place the pressure vessel between clamping sleeve 18 and clamping sleeve 20, then start the electric push rod 24 to push the moving plate 25 down, and rotate the sleeve 26 to assist in fixing it. Specifically, the pressure vessel is placed between ferrule 18 and ferrule 20. The motor 2 is started in reverse, and the bidirectional lead screw 13 reverses to move the ferrules in the opposite direction, causing the inner rollers 22 to fit against the outer wall of the vessel. At the same time, the electric push rod 24 at the top of the cross 23 pushes the moving plate 25 down, and the rotating sleeve 26 presses against the top of the vessel, forming a horizontal clamping and vertical limiting effect.

[0027] Step 3: Move the welding gun 30 to the circumferential seam using the robotic arm 29. Then, the connecting rod 1 31 and the connecting rod 2 32 drive the abrasive roller 33, which stretches the spring 34 until the welding gun 30 touches the container. Specifically, the robotic arm 29 rotates the base plate 28 to adjust the welding torch 30 to the circumferential seam position, simultaneously moving connecting rod 1 31 and connecting rod 2 32. At this time, the spring 34 is stretched, allowing the abrasive roller 33 to fit against the circumferential seam.

[0028] Step 4: The electromagnetic clutch 10 cuts off the power to the rotating rod 9, so that the motor 2 drives the turntable 3 to rotate the container, the roller 22 assists in smooth rotation, and the abrasive roller 33 polishes the circumferential seam; Specifically, the electromagnetic clutch 10 is de-energized and disconnected by the PLC, cutting off the connection between the support shaft 7 and the rotating rod 9. At this time, the motor 2 only drives the turntable 3 to rotate. The rollers 22 in the first ferrule 18 and the second ferrule 20 can ensure that the container rotates smoothly. When the pressure vessel rotates, the abrasive roller 33 continuously polishes the oxide layer of the circumferential seam under the elastic force of the spring 34.

[0029] Step 5: Start the welding torch 30 to weld the pressure vessel; Specifically, welding torch 30 is connected to the transformer and used for welding along the circumferential seam.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical circumferential welder for pressure vessels, characterized in that, include: Platform (1), a cross (23) is fixedly connected to the left side of the top of the platform (1), a turntable (3) and a rotating rod (9) are connected to the bottom of the platform (1) through a drive mechanism, the bottom of the turntable (3) is rotatably connected to the top of the platform (1), the outer wall of the rotating rod (9) is rotatably connected to the inner wall of the cross (23), the top side of the outer wall of the rotating rod (9) is connected to a bidirectional lead screw (13) through a steering assembly, the outer wall of the bidirectional lead screw (13) is rotatably connected to the inner wall of the cross (23), the... The outer wall of the bidirectional lead screw (13) is connected to a movable sleeve one (14) and a movable sleeve two (15) by a threaded sleeve. The movable sleeve one (14) is set on the front side of the outer wall of the bidirectional lead screw (13) by a threaded sleeve, and the movable sleeve two (15) is set on the rear side of the outer wall of the bidirectional lead screw (13) by a threaded sleeve. The right ends of the movable sleeve one (14) and the movable sleeve two (15) are respectively connected to a retaining sleeve one (18) and a retaining sleeve two (20) by a support assembly. A fixing assembly is set at the top of the cross (23). A support frame (27) is fixedly connected at the bottom end to the top end of the platform (1). A base plate (28) is rotatably connected to the top end of the support frame (27). A robotic arm (29) is fixedly connected to the top end of the base plate (28). A welding gun (30) is fixedly connected to the left end of the robotic arm (29). A connecting rod 1 (31) is fixedly connected to the front side of the left end of the robotic arm (29). A connecting rod 2 (32) is rotatably connected to the front end of the connecting rod 1 (31). A sanding roller (33) is fixedly connected to the left end of the connecting rod 2 (32). The left end of the connecting rod 1 (31) is connected to the connecting rod 2 (32) through an elastic component.

2. The pressure vessel vertical circumferential weldment device according to claim 1, characterized in that, The driving mechanism includes a motor (2) located at the bottom of the platform (1). The motor (2) is mounted at the bottom of the platform (1) by a fixing frame. The driving end of the motor (2) is fixedly connected to the bottom of the turntable (3). The driving end of the motor (2) is fixedly connected to a first synchronous wheel (4). The outer wall of the first synchronous wheel (4) is connected to a second synchronous wheel (6) by a synchronous belt (5). The inner wall of the second synchronous wheel (6) is fixedly connected to a support shaft (7). The top side of the outer wall of the support shaft (7) is connected to a rotating rod (9) by a connecting transmission assembly. The top of the support shaft (7) is rotatably connected to the bottom of the rotating rod (9).

3. The pressure vessel vertical circumferential weldment device according to claim 2, characterized in that, The connecting transmission assembly includes a connecting sleeve (8) located on the outer wall of the support shaft (7). The inner wall of the connecting sleeve (8) is slidably connected to the outer wall of the support shaft (7). Both the connecting sleeve (8) and the outer wall of the rotating rod (9) are fixedly connected to an electromagnetic clutch (10).

4. The pressure vessel vertical circumferential welder according to claim 3, characterized in that, The steering assembly includes a bevel gear one (11) located on the top side of the outer wall of the rotating rod (9), and a bevel gear two (12) meshing with the top of the bevel gear one (11). The inner wall of the bevel gear two (12) is fixedly connected to the outer wall of the bidirectional lead screw (13).

5. A vertical circumferential welder for pressure vessels according to claim 4, characterized in that, The elastic component includes a connecting block two (37) located at the left end of the connecting rod one (31). The connecting block two (37) is rotatably connected to the left end of the connecting rod one (31). The rear end of the connecting rod two (32) is fixedly connected to a fixing sleeve two (35). The rear end of the fixing sleeve two (35) is rotatably connected to a connecting block one (36). The rear end of the connecting block one (36) is connected to the connecting block two (37) through a spring (34). One end of the spring (34) is connected to the left end of the connecting block two (37), and the other end of the spring (34) is connected to the rear end of the connecting block one (36).

6. The pressure vessel vertical circumferential weldment device according to claim 5, characterized in that, The fixing component includes an electric push rod (24) located at the top of the cross (23), a movable plate (25) fixedly connected to the bottom end of the electric push rod (24), the left end of the movable plate (25) being slidably connected to the right end of the cross (23), and a rotating sleeve (26) being rotatably connected to the bottom end of the movable plate (25).

7. A vertical circumferential welder for pressure vessels according to claim 6, characterized in that, The support assembly includes a connecting frame (16) located at the right end of the movable sleeve one (14) and the movable sleeve two (15). The right end of the front connecting frame (16) is fixedly connected to a fixing rod one (17), and the right end of the rear connecting frame (16) is fixedly connected to a fixing rod two (19). The top and bottom ends of the fixing rod one (17) are fixedly connected to the near ends of the two sleeves one (18), and the top and bottom ends of the fixing rod two (19) are fixedly connected to the near ends of the two sleeves two (20).

8. A vertical circumferential welder for pressure vessels according to claim 7, characterized in that, Both the first (18) and the second (20) of the card sleeve are fixedly connected to the inner circumference of the first (21) and the inner walls of the multiple first (21) are rotatably connected to the rollers (22).

9. A vertical circumferential welder for pressure vessels according to claim 8, characterized in that, A transformer is fixedly connected to the rear top of the platform (1), and the welding gun (30) is connected to the transformer via a power transmission line.

10. A welding step of a vertical circumferential welder for pressure vessels, using the vertical circumferential welder for pressure vessels as described in claim 9, characterized in that... Includes the following steps: Step 1: Start the motor (2) and drive the bidirectional lead screw (13) to rotate via the synchronous belt (5), which in turn drives the first movable sleeve (14) and the second movable sleeve (15) to unfold the first clamp (18) and the second clamp (20); Step 2: Place the pressure vessel between clamping sleeve 1 (18) and clamping sleeve 2 (20), then start the electric push rod (24) to push the moving plate (25) down, and rotate the sleeve (26) to assist in fixing; Step 3: Move the welding gun (30) to the circumferential seam using the robotic arm (29). Then, connecting rod 1 (31) and connecting rod 2 (32) drive the abrasive roller (33), which stretches the spring (34) until the welding gun (30) touches the container. Step 4: Cut off the power of the rotating rod (9) by using the electromagnetic clutch (10), so that the motor (2) only drives the turntable (3) to rotate the container, the roller (22) assists in smooth rotation, and the abrasive roller (33) polishes the circumferential seam; Step 5: Start the welding torch (30) to weld the pressure vessel.

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