Vertical girth welding device for pressure vessel

Abstract

The invention relates to the technical field of welding, and provides a pressure vessel vertical girth welding device which comprises a platform, a cross is fixedly connected to the left side of the top end of the platform, a rotating disc and a rotating rod are connected to the bottom end of the platform through a driving mechanism, and 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 rotatably connected to the inner wall of the cross frame, the top side of the outer wall of the rotating rod is connected with a two-way screw rod through a steering assembly, the outer wall of the two-way screw rod is rotatably connected to the inner wall of the cross frame, and the outer wall of the two-way screw rod is connected with a first moving sleeve and a second moving sleeve through threaded sleeves; the first moving sleeve is arranged on the front side of the outer wall of the two-way lead screw through a threaded sleeve. The two-way lead screw is driven by the motor to achieve automatic opening and closing of the clamping sleeve, the clamping sleeve is matched with the electric push rod and the rotating sleeve to form a horizontal clamping and vertical limiting three-dimensional fixing structure, manual adjustment is not needed, pressure containers with different diameters can be rapidly adapted, and the clamping efficiency is remarkably improved.

Description

Technical Field

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

[0002] In the petrochemical, energy and power, and specialty equipment manufacturing industries, pressure vessels are critical equipment for storing and transporting high-pressure media. The quality of their welding is directly related to the safety and reliability of equipment operation. Vertical girth welding, a core process in pressure vessel manufacturing, must ensure the weld has excellent sealing and mechanical properties. This places extremely high demands on the welding equipment's automation level, clamping stability, and welding precision.

[0003] Conventional pressure vessel girth welding systems typically utilize manual or semi-manual clamping mechanisms. During the clamping process, manual adjustment of the fixture position is required to accommodate containers of varying diameters. This is not only cumbersome and time-consuming, but manual positioning errors can easily lead to eccentric clamping of the container, which in turn causes the girth seam to shift during welding. Furthermore, conventional systems often utilize a single horizontal clamping mechanism and lack vertical limiting mechanisms. This makes the container susceptible to up-and-down wobbling during rotary welding, due to the reaction force of the welding torch or rotational inertia, seriously affecting the quality of the weld. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a vertical circumferential seam welding device for pressure vessels, which solves the problem of manually adjusting the position of the clamps to adapt to containers of different diameters during the clamping process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A vertical girth welding device for a pressure vessel, comprising:

[0006] The platform, the left side of the top of the platform is fixedly connected with a cross, the bottom end of the platform is connected with a turntable and a turning rod through a driving mechanism, the bottom end of the turntable is rotatably connected to the top of the platform, the outer wall of the turning rod is rotatably connected to the inner wall of the cross, the top side of the outer wall of the turning rod is connected with a bidirectional screw rod through a steering assembly, the outer wall of the bidirectional screw rod is rotatably connected to the inner wall of the cross, the outer wall of the bidirectional screw rod is connected with a movable sleeve 1 and a movable sleeve 2 through a threaded sleeve, the movable sleeve 1 is arranged on the front side of the outer wall of the bidirectional screw rod through a threaded sleeve, and the movable sleeve 2 is arranged on the rear side of the outer wall of the bidirectional screw rod through a threaded sleeve, the left ends of the movable sleeve 1 and the movable sleeve 2 are connected with a clamping sleeve 1 and a clamping sleeve 2 through a supporting assembly, and a fixed assembly is provided on the top of the cross;

[0007] The support frame has its bottom end fixedly connected to the top of the platform, the top of the support frame is rotatably connected to the base plate, the top of the base plate is fixedly connected to the robotic arm, the left end of the robotic arm is fixedly connected to the welding gun, the front side of the left end of the robotic arm is fixedly connected to the connecting rod 1, the front end of the connecting rod 1 is rotatably connected to the connecting rod 2, the left end of the connecting rod 2 is fixedly connected to the sanding stick, and the left end of the connecting rod 1 is connected to the connecting rod 2 through an elastic component.

[0008] Preferably, the driving assembly includes a motor located at the bottom end of the platform, the motor is installed at the bottom end of the platform through a fixing bracket, the driving end of the motor is fixedly connected to the bottom end of the turntable, the driving end of the motor is fixedly connected to a synchronous wheel 1, the outer wall of the synchronous wheel 1 is connected to the synchronous wheel 2 through a synchronous belt, the inner wall of the synchronous wheel 2 is fixedly connected to a support shaft, the top side of the outer wall of the support shaft is connected to a rotating rod through a connecting transmission assembly, and the top end of the support shaft is rotatably connected to the bottom end of the rotating rod.

[0009] 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 is slidably connected to the outer wall of the support shaft, and the connecting sleeve and the outer wall of the rotating rod are both fixedly connected with an electromagnetic clutch.

[0010] Preferably, the steering assembly includes a bevel gear 1 located on the top side of the outer wall of the rotating rod, the top end of the bevel gear 1 is meshedly connected with a bevel gear 2, and the inner wall of the bevel gear 2 is fixedly connected to the outer wall of the bidirectional screw rod.

[0011] Preferably, the elastic component includes a connecting block 2 located at the left end of the connecting rod 1, the connecting block 2 is rotatably connected to the left end of the connecting rod 1, the rear end of the connecting rod 2 is fixedly connected to the fixing sleeve 2, the rear end of the fixing sleeve 2 is rotatably connected to the connecting block 1, the rear end of the connecting block 1 is connected to the connecting block 2 through a spring, one end of the spring is connected to the left end of the connecting block 2, and the other end of the spring is connected to the rear end of the connecting block 1.

[0012] Preferably, the fixing assembly includes an electric push rod located at the top of the cross, the bottom end of the electric push rod is fixedly connected to a moving plate, the left end of the moving plate is slidably connected to the right end of the cross, and the bottom end of the moving plate is rotatably connected to a rotating sleeve.

[0013] Preferably, the inner peripheries of the clamping sleeve 1 and the clamping sleeve 2 are fixedly connected with a fixed sleeve 1, and the inner walls of the plurality of fixed sleeves 1 are rotatably connected with rollers.

[0014] Preferably, the support assembly includes a connecting frame located at the right end of movable sleeve 1 and movable sleeve 2, the right end of the front connecting frame is fixedly connected to fixed rod 1, and the right end of the rear connecting frame is fixedly connected to fixed rod 2, the top and bottom ends of fixed rod 1 are fixedly connected to the adjacent ends of the two clamping sleeves 1, and the top and bottom ends of fixed rod 2 are fixedly connected to the adjacent ends of the two clamping sleeves 2.

[0015] 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.

[0016] A welding process of a vertical girth welding device for a pressure vessel comprises the following steps:

[0017] Step 1: Start the motor to drive the bidirectional screw to rotate through the synchronous belt, and then drive the movable sleeve 1 and movable sleeve 2 to drive the card sleeve 1 and card sleeve 2 to unfold;

[0018] Step 2: Place the pressure vessel between ferrule 1 and ferrule 2 for clamping, then start the electric push rod to push the moving plate down, and the rotating sleeve assists in fixing;

[0019] Step 3: Move the welding gun to the annular seam through the robotic arm, and then the connecting rods 1 and 2 drive the grinding rod to stretch the spring until the welding gun touches the container;

[0020] Step 4: Cut off the power of 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 grinding stick grinds the annular seam;

[0021] Step 5: Start the welding gun to weld the pressure vessel.

[0022] Working principle: Start the motor and drive the electromagnetic clutch to rotate through the synchronous belt. When the electromagnetic clutch rotates, it will drive the bevel gear 1 to rotate together, and under the action of the meshing of bevel gear 1 and bevel gear 2, it can drive the bidirectional screw to rotate. When the bidirectional screw rotates, it will drive the two movable sleeves to move in the opposite direction, and then drive the ferrule 1 and ferrule 2 to move in the opposite direction through the connecting frame. Then, the two halves of the pressure vessel to be welded are placed between the ferrule 1 and the ferrule 2, and then the motor is started. The electromagnetic clutch is rotated in the opposite direction by the motor, and the bevel gear 1, bevel gear 2 and bidirectional screw are rotated. Under the action of , the ferrule 1 and the ferrule 2 are rotated in relative directions, thereby clamping and fixing the pressure vessel, and then the electric push rod is started to move the movable plate downward to further fix the pressure vessel. At this time, the pressure vessel is clamped above the turntable and below the rotating sleeve, and then the welding gun is moved to the gap between the two pressure vessels by the robotic arm. At this time, the welding gun will drive the grinding stick to move through the connecting rod 1 and the connecting rod 2 during the movement. In the process of the welding gun approaching the pressure vessel, the angle between the connecting rod 1 and the connecting rod 2 becomes larger and larger, and stretches until the welding gun touches the pressure vessel and stops. After that, the electromagnetic clutch is used to stop the motor from providing driving force for the rotating rod, and then the motor is started again. At this time, due to the electromagnetic clutch, the motor can drive the pressure vessel to rotate between the turntable and the rotating sleeve through the turntable, and the rollers in the ferrule 1 and the ferrule 2 can make the pressure vessel rotate more smoothly. At this time, when the pressure vessel is rotating, the grinding stick will grind the gap of the pressure vessel to be welded, and then the welding gun can be started to weld the pressure vessel. After welding is completed, the welding gun and the connecting rod 2 are moved to one side by the robotic arm. At this time, the spring will be tightened to make the connecting rod 1 and The angle between the two connecting rods is restored, and then the electric push rod is started to move the movable plate upward, canceling the limit on the pressure vessel, and then the electromagnetic clutch is controlled to connect the connecting sleeve and the rotating rod. At this time, the starting motor can drive the support shaft to rotate through the synchronous wheel one, the synchronous belt and the synchronous wheel two, and drive the connecting sleeve to rotate through the support shaft, and then drive the bidirectional screw rod to rotate through the rotating rod, the bevel gear one and the bevel gear two. Under the action of the movable sleeve one and the movable sleeve two, the clamping sleeve one and the clamping sleeve two can be moved in opposite directions, canceling the clamping of the pressure vessel, and the welded pressure vessel can be taken out.

[0023] The present invention provides a vertical girth welding device for pressure vessels. It has the following beneficial effects:

[0024] 1. The present invention realizes the automatic opening and closing of the ferrule by driving the bidirectional screw rod by a motor, and forms a three-dimensional fixed structure with horizontal clamping and vertical limiting in conjunction with the electric push rod and the rotating sleeve. It does not require manual adjustment and can quickly adapt to pressure vessels of different diameters, significantly improving the clamping efficiency.

[0025] 2. In this invention, as the robotic arm drives the welding gun, an elastic linkage mechanism synchronizes the grinding rod with the circumferential seam, achieving a continuous process of grinding the oxide layer before welding as the container rotates. Compared to the traditional grinding-before-welding process, this reduces process transition time, and the grinding force is automatically adjusted by a spring, avoiding weld defects caused by uneven manual grinding.

[0026] 3. The electromagnetic clutch of this invention instantly cuts off the power to the rotating rod, allowing the motor to drive only the rotating disk for welding, reducing the energy consumption of non-essential components. Compared with traditional full-time transmission solutions, it can effectively reduce power consumption. At the same time, the roller support structure reduces the resistance torque of the container rotation, extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A perspective view of the present invention;

[0028] Figure 2 Schematic diagram of the motor structure of the present invention;

[0029] Figure 3 This is a structural diagram of a bevel gear according to the present invention;

[0030] Figure 4 It is a schematic structural diagram of the electromagnetic clutch of the present invention;

[0031] Figure 5 This is a structural schematic diagram of the second movable sleeve of the present invention;

[0032] Figure 6 It is a schematic diagram of the roller structure of the present invention;

[0033] Figure 7 It is a schematic structural diagram of the welding gun of the present invention;

[0034] Figure 8 It is a schematic diagram of the spring structure of the present invention.

[0035] Among them, 1. platform; 2. motor; 3. turntable; 4. synchronous wheel 1; 5. synchronous belt; 6. synchronous wheel 2; 7. support shaft; 8. connecting sleeve; 9. rotating rod; 10. electromagnetic clutch; 11. bevel gear 1; 12. bevel gear 2; 13. bidirectional screw; 14. movable sleeve 1; 15. movable sleeve 2; 16. connecting frame; 17. fixed rod 1; 18. clamping sleeve 1; 19. fixed rod 2; 20. clamping sleeve 2; 21. fixed sleeve 1; 22. roller; 23. cross; 24. electric push rod; 25. movable plate; 26. rotating sleeve; 27. support frame; 28. bottom plate; 29. ​​robotic arm; 30. welding gun; 31. connecting rod 1; 32. connecting rod 2; 33. grinding stick; 34. spring; 35. fixed sleeve 2; 36. connecting block 1; 37. connecting block 2. 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] Example:

[0038] Please see the attached Figure 1 -Attached Figure 8 The embodiment of the present invention provides a vertical girth welding device for a pressure vessel, comprising:

[0039] Platform 1, the left side of the top of the platform 1 is fixedly connected to a cross 23, the bottom of the platform 1 is connected to a turntable 3 and a rotating rod 9 through a motor 2, a synchronous wheel 1 4, a synchronous belt 5, a synchronous wheel 2 6 and a support shaft 7, the bottom end 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 screw rod 13 through a bevel gear 11 and a bevel gear 2 12, the outer wall of the bidirectional screw rod 13 is rotatably connected to the inner wall of the cross 23, the bidirectional screw rod The outer wall of 13 is connected with a movable sleeve 14 and a movable sleeve 2 15 through a threaded sleeve. The movable sleeve 14 is arranged on the front side of the outer wall of the bidirectional screw rod 13 through a threaded sleeve. The movable sleeve 2 15 is arranged on the rear side of the outer wall of the bidirectional screw rod 13 through a threaded sleeve. The left ends of the movable sleeve 14 and the movable sleeve 2 15 are connected with a clamping sleeve 18 and a clamping sleeve 20 through a connecting frame 16, a fixed rod 17, and a fixed rod 2 19. The top of the cross 23 is provided with an electric push rod 24, a movable plate 25 and a rotating sleeve 26;

[0040] Specifically, the platform 1 serves as the basic supporting structure of the device, and an emergency stop button is provided around it. When the device is abnormal, pressing it can cut off the power supply of the motor 2. A cross 23 is fixed on the left side of the top to install transmission components such as the bidirectional screw 13. The motor 2 is installed on the bottom through a fixed frame, and a rotating support surface is provided for the turntable 3. Its structural design ensures a reasonable spatial layout of each functional module and the coordinated work of the driving mechanism and the welding mechanism. The turntable 3 carries the pressure vessel and rotates under the drive of the motor 2. Its top surface cooperates with the ferrule 18 and the ferrule 2 20 to form a container support surface. The electric push rod 24 is fixed on the top of the cross 23, and the inner wall supports the rotating rod 9 and the bidirectional screw 13, providing an installation foundation for the steering assembly and the bidirectional screw 13, and realizing the vertical fixation of the pressure vessel by cooperating with the electric push rod 24.

[0041] Support frame 27, the bottom end of support frame 27 is fixedly connected to the top of platform 1, the top of support frame 27 is rotatably connected to base plate 28, the top 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 a grinding stick 33, the left end of connecting rod 1 31 is connected to connecting rod 2 32 via connecting block 2 37, fixing sleeve 2 35, connecting block 1 36 and spring 34;

[0042] 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 seam welding. The welding torch 30 is connected to the transformer on the rear side of the platform 1 via a power line, providing the required welding current. The transformer is equipped with overload protection, and when the current exceeds the rated value, the circuit breaker automatically trips.

[0043] Among them, the motor 2 is located at the bottom end of the platform 1, and the motor 2 is installed at the bottom end of the platform 1 through a fixed frame. The driving end of the motor 2 is fixedly connected to the bottom end of the turntable 3. The driving end of the motor 2 is fixedly connected to the synchronous wheel 1 4. The outer wall of the synchronous wheel 1 4 is connected to the synchronous wheel 2 6 through a synchronous belt 5. The inner wall of the synchronous wheel 2 6 is fixedly connected to the support shaft 7. The top side of the outer wall of the support shaft 7 is connected to the rotating rod 9 through a connecting sleeve 8 and an electromagnetic clutch 10. The top end of the support shaft 7 is rotatably connected to the bottom end of the rotating rod 9. The connecting sleeve 8 located on the outer wall of the support shaft 7, the connecting sleeve The inner wall of 8 is slidably connected to the outer wall of the support shaft 7, and the outer wall of the connecting sleeve 8 and the rotating rod 9 are fixedly connected to the electromagnetic clutch 10, wherein the bevel gear 11 is located on the top side of the outer wall of the rotating rod 9, and the top of the bevel gear 11 is engaged with the bevel gear 2 12, and the inner wall of the bevel gear 2 12 is fixedly connected to the outer wall of the bidirectional screw 13, wherein the connecting block 2 37 is located at the left end of the connecting rod 1 31, and the connecting block 2 37 is rotatably connected to the left end of the connecting rod 1 31, and the rear end of the connecting rod 2 32 is fixedly connected to the fixed sleeve 2 35, and the rear end of the fixed sleeve 2 35 is rotatably connected to the connecting rod 1 Block 1 36, the rear end of the connecting block 1 36 is connected to the connecting block 2 37 through a spring 34, one end of the spring 34 is connected to the left end of the connecting block 2 37, and the other end of the spring 34 is connected to the rear end of the connecting block 1 36, wherein the electric push rod 24 at the top of the cross 23, the bottom end of the electric push rod 24 is fixedly connected to the moving plate 25, the left end of the moving plate 25 is slidably connected to the right end of the cross 23, and the bottom end of the moving plate 25 is rotatably connected to the rotating sleeve 26, the inner periphery of the ferrule 1 18 and the ferrule 2 20 are fixedly connected to the fixed sleeve 1 21, and multiple fixed The inner wall of the sleeve 1 21 is rotatably connected to the roller 22, wherein the connecting frame 16 is located at the right end of the movable sleeve 14 and the movable sleeve 2 15, the right end of the front connecting frame 16 is fixedly connected to the fixing rod 17, the right end of the rear connecting frame 16 is fixedly connected to the fixing rod 2 19, the top and bottom ends of the fixing rod 17 are fixedly connected to the adjacent ends of the two clamping sleeves 18, the top and bottom ends of the fixing rod 2 19 are fixedly connected to the adjacent ends of the two clamping sleeves 20, the top and rear side of the platform 1 is fixedly connected to the transformer, and the welding gun 30 is connected to the transformer through a power transmission line;

[0044] Specifically, motor 2 is the core power source, synchronously driving the turntable 3 and the transmission system via its output shaft. When motor 2 rotates forward, it drives synchronous pulley 1 4 and synchronous belt 5, driving synchronous pulley 2 6, which in turn drives the support shaft 7 and rotating rod 9. When rotating backward, it controls the clamping and loosening of the ferrule, achieving bidirectional power output. A roller 22 on the inner circumference of the ferrule is mounted via fixed sleeve 1 21. The surface of roller 22 is chrome-plated. When the container rotates, roller 22 rolls to reduce frictional resistance, ensuring smooth rotation and preventing weld deviation due to shaking during welding. Synchronous pulley 1 4, synchronous belt 5, and synchronous pulley 2 6 form a belt drive system that transmits power from motor 2 to support shaft 7. The connecting sleeve 8 is sleeved on the support shaft 7 and realizes power clutch with the rotating rod 9 through the electromagnetic clutch 10: when the electromagnetic clutch 10 is attracted, the support shaft 7 drives the rotating rod 9 to rotate; when it is disengaged, the rotating rod 9 stops the power input, and only the turntable 3 rotates. The bevel gear 11 at the top of the rotating rod 9 engages with the bevel gear 2 12, converting the vertical rotation into the horizontal rotation of the bidirectional screw 13. The bidirectional screw 13 drives the movable sleeve 14 and movable sleeve 2 15 to move relative or in opposite directions through the forward and reverse threads, and then drives the clamping sleeve 18 and clamping sleeve 2 20 to open or close through the connecting frame 16, fixed rod 17, and fixed rod 2 19, realizing automatic clamping of the container. The electric push rod 24 at the top of the cross 23 pushes the movable plate 25 downward, so that the rotating sleeve 26 is pressed against the top of the container, forming an upper and lower clamping structure with the clamping sleeve. The rotating sleeve 26 can rotate with the container, ensuring fixed stability without hindering the rotation movement. It is suitable for pressure vessels of different heights. When the connecting rod 1 31 and the connecting rod 2 32 drive the grinding rod 33 to move, the spring 34 forms an elastic connection with the fixed sleeve 2 35 through the connecting block 1 36 and the connecting block 2 37, so that the grinding rod 33 adaptively fits the container surface, completing the annular seam grinding pretreatment when the container rotates.

[0045] When the electromagnetic clutch 10 is in the engaged state, the connecting sleeve 8 and the rotating rod 9 form a rigid connection through the electromagnetic clutch 10. At this time, the motor 2 drives the support shaft 7 to rotate through the synchronous wheel 1 4, the synchronous belt 5, and the synchronous wheel 2 6. The support shaft 7 drives the rotating rod 9 to rotate through the connecting sleeve 8 and the electromagnetic clutch 10, and then transmits the power to the two-way screw 13 through the bevel gear 1 11 and the bevel gear 2 12, realizing the opening and closing action of the card sleeve 18 and the card sleeve 2 20. When the electromagnetic clutch 10 is powered off and separated, the connecting sleeve 8 moves downward and cancels the contact with the rotating rod 9. When the motor 2 is driven, it can still drive the support shaft 7 to rotate through the synchronous wheel 1 4, the synchronous belt 5 and the synchronous wheel 2 6. However, since the electromagnetic clutch 10 is powered off and separated, the support shaft 7 is cut off. It is connected to the power of the rotating rod 9. At this time, 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, driving the container to rotate between the turntable 3 and the rotating sleeve 26, while the rotating rod 9 and the two-way screw 13 stop moving, avoiding energy waste caused by the operation of unnecessary components. The electromagnetic clutch 10 transmits power when it is attracted and cuts off power when it is separated through two-way control, realizing efficient switching of the device between clamping and rotary welding modes, which not only ensures the convenience of automatic clamping, but also reduces energy consumption by optimizing the power path, and avoids redundant operation of transmission components.

[0046] A welding process of a vertical girth welding device for a pressure vessel comprises the following steps:

[0047] Step 1: Start the motor 2 to drive the bidirectional screw 13 to rotate through the synchronous belt 5, and then drive the movable sleeve 14 and the movable sleeve 2 15 to drive the clamping sleeve 18 and the clamping sleeve 2 20 to unfold;

[0048] Specifically, start motor 2, and its drive end rotates synchronous wheel 2 6 via synchronous wheel 1 4 and synchronous belt 5. Synchronous wheel 2 6 is coaxially connected to support shaft 7, causing support shaft 7 to rotate at a transmission ratio of 1:1.5. At this time, the connecting sleeve 8 on the outer wall of support shaft 7 engages with the rotating rod 9 through the electromagnetic clutch 10, transmitting power to the rotating rod 9. The bevel gear 1 11 at the top of the rotating rod 9 engages with the bevel gear 2 12, converting the vertical rotation into horizontal rotation of the bidirectional screw 13. The pitch of the bidirectional screw 13 drives the movable sleeve 14 and movable sleeve 2 15 in opposite directions through the forward and reverse threads, and drives the clamping sleeve 18 and clamping sleeve 2 20 to open through the connecting frame 16, fixed rod 17, and fixed rod 2 19.

[0049] Step 2: Place the pressure vessel between the first clamping sleeve 18 and the second clamping sleeve 20 for clamping, then start the electric push rod 24 to push the movable plate 25 downward, and the rotating sleeve 26 assists in fixing;

[0050] Specifically, the pressure vessel is placed between ferrule 18 and ferrule 20. Motor 2 is then started in reverse, causing the bidirectional screw 13 to reverse, moving the ferrules in opposite directions. The inner rollers 22 then contact the outer wall of the vessel. Simultaneously, the electric push rod 24 at the top of the cross 23 pushes the movable plate 25 downward, pressing the rotating sleeve 26 against the top of the vessel, creating both horizontal clamping and vertical limiting effects.

[0051] Step 3: The welding gun 30 is moved to the annular seam by the robot arm 29, and then the connecting rod 1 31 and the connecting rod 2 32 drive the grinding rod 33 to stretch the spring 34 until the welding gun 30 touches the container;

[0052] Specifically, the mechanical arm 29 rotates the adjustment welding gun 30 to the annular seam position through the base plate 28, and synchronously drives the connecting rod 1 31 and the connecting rod 2 32 to move. At this time, the spring 34 is stretched so that the grinding rod 33 can fit the annular seam.

[0053] Step 4: The electromagnetic clutch 10 cuts off the power of the rotating rod 9, so that the motor 2 only drives the turntable 3 to rotate the container, the roller 22 assists in smooth rotation, and the grinding roller 33 grinds the annular seam;

[0054] Specifically, the electromagnetic clutch 10 is powered off and separated 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, and the rollers 22 in the ferrule 18 and the ferrule 2 20 can ensure smooth rotation of the container. When the pressure vessel rotates, the grinding rod 33 continues to grind the annular oxide layer under the elastic force of the spring 34.

[0055] Step 5: Start the welding gun 30 to weld the pressure vessel;

[0056] Specifically, the welding gun 30 is connected to the transformer and welded along the annular seam.

[0057] 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 vertical girth welding device for pressure vessels, characterized in that: include: The platform (1) is fixedly connected to a cross (23) on the left side of the top of the platform (1), and the bottom of the platform (1) is connected to a turntable (3) and a rotating rod (9) through a driving mechanism. The bottom of the turntable (3) is rotatably connected to the top of the platform (1), and 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 screw rod (13) through a steering assembly, and the outer wall of the bidirectional screw rod (13) is rotatably connected to the inner wall of the cross (23). The outer wall of the bidirectional screw rod (13) is connected to a movable sleeve 1 (14) and a movable sleeve 2 (15) through a threaded sleeve. The movable sleeve 1 (14) is arranged on the front side of the outer wall of the bidirectional screw rod (13) through the threaded sleeve. The movable sleeve 2 (15) is arranged on the rear side of the outer wall of the bidirectional screw rod (13) through the threaded sleeve. The left ends of the movable sleeve 1 (14) and the movable sleeve 2 (15) are connected to a clamping sleeve 1 (18) and a clamping sleeve 2 (20) through a supporting component. The top of the cross (23) is provided with a fixing component. A support frame (27), wherein the bottom end of the support frame (27) is fixedly connected to the top end of the platform (1), the top end of the support frame (27) is rotatably connected to a base plate (28), the top end of the base plate (28) is fixedly connected to a mechanical arm (29), the left end of the mechanical arm (29) is fixedly connected to a welding gun (30), the front side of the left end of the mechanical arm (29) is fixedly connected to a connecting rod 1 (31), the front end of the connecting rod 1 (31) is rotatably connected to a connecting rod 2 (32), the left end of the connecting rod 2 (32) is fixedly connected to a grinding stick (33), and the left end of the connecting rod 1 (31) is connected to the connecting rod 2 (32) through an elastic component.

2. A vertical girth welding device for pressure vessels according to claim 1, characterized in that: The driving assembly comprises a motor (2) located at the bottom end of the platform (1), the motor (2) being mounted on the bottom end of the platform (1) via a fixing frame, the driving end of the motor (2) being fixedly connected to the bottom end of the turntable (3), the driving end of the motor (2) being fixedly connected to a synchronous wheel (4), the outer wall of the synchronous wheel (4) being connected to a synchronous wheel (6) via a synchronous belt (5), the inner wall of the synchronous wheel (6) being fixedly connected to a support shaft (7), the top side of the outer wall of the support shaft (7) being connected to a rotating rod (9) via a connecting transmission assembly, and the top end of the support shaft (7) being rotatably connected to the bottom end of the rotating rod (9).

3. A vertical circumferential seam welding device for pressure vessels according to claim 2, characterized in that: The connecting transmission assembly comprises 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), and the connecting sleeve (8) and the outer wall of the rotating rod (9) are both fixedly connected with an electromagnetic clutch (10).

4. A vertical girth welding device for pressure vessels according to claim 1, characterized in that: The steering assembly includes a bevel gear 1 (11) located on the top side of the outer wall of the rotating rod (9), the top end of the bevel gear 1 (11) is meshedly connected with a bevel gear 2 (12), and the inner wall of the bevel gear 2 (12) is fixedly connected to the outer wall of the bidirectional screw rod (13).

5. The vertical girth welding device for pressure vessels according to claim 1, characterized in that: The elastic component includes a connecting block 2 (37) located at the left end of the connecting rod 1 (31), the connecting block 2 (37) is rotatably connected to the left end of the connecting rod 1 (31), the rear end of the connecting rod 2 (32) is fixedly connected to the fixing sleeve 2 (35), the rear end of the fixing sleeve 2 (35) is rotatably connected to the connecting block 1 (36), the rear end of the connecting block 1 (36) is connected to the connecting block 2 (37) through a spring (34), one end of the spring (34) is connected to the left end of the connecting block 2 (37), and the other end of the spring (34) is connected to the rear end of the connecting block 1 (36).

6. The vertical girth welding device for pressure vessels according to claim 1, characterized in that: The fixed assembly comprises an electric push rod (24) located at the top end of the cross (23), the bottom end of the electric push rod (24) is fixedly connected to a moving plate (25), the left end of the moving plate (25) is slidably connected to the right end of the cross (23), and the bottom end of the moving plate (25) is rotatably connected to a rotating sleeve (26).

7. The vertical girth welding device for pressure vessels according to claim 1, characterized in that: The inner peripheries of the clamping sleeve 1 (18) and the clamping sleeve 2 (20) are fixedly connected to a fixed sleeve 1 (21), and the inner walls of the plurality of fixed sleeves 1 (21) are rotatably connected to rollers (22).

8. The vertical girth welding device for pressure vessels according to claim 1, characterized in that: The support assembly includes a connecting frame (16) located at the right end of the movable sleeve 1 (14) and the movable sleeve 2 (15), the right end of the front connecting frame (16) is fixedly connected to a fixing rod 1 (17), and the right end of the rear connecting frame (16) is fixedly connected to a fixing rod 2 (19), the top and bottom ends of the fixing rod 1 (17) are fixedly connected to the adjacent ends of the two clamping sleeves 1 (18), and the top and bottom ends of the fixing rod 2 (19) are fixedly connected to the adjacent ends of the two clamping sleeves 2 (20).

9. The vertical girth welding device for pressure vessels according to claim 1, characterized in that: A transformer is fixedly connected to the rear side of the top end of the platform (1), and the welding gun (30) is connected to the transformer via a power transmission line.

10. A welding process of a vertical girth welding device for a pressure vessel, using a vertical girth welding device for a pressure vessel according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Start the motor (2) to drive the bidirectional screw (13) to rotate through the synchronous belt (5), thereby driving the movable sleeve 1 (14) and the movable sleeve 2 (15) to drive the clamping sleeve 1 (18) and the clamping sleeve 2 (20) to unfold; Step 2: Place the pressure vessel between the first clamping sleeve (18) and the second clamping sleeve (20) to clamp them, then start the electric push rod (24) to push the moving plate (25) downward, and the rotating sleeve (26) assists in fixing; Step 3: Move the welding gun (30) to the annular seam through the robot arm (29), and then the connecting rod (31) and the connecting rod (32) drive the grinding rod (33) to stretch the spring (38) until the welding gun touches the container; Step 4: The power of the rotating rod (9) is cut off by 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 grinding stick (33) grinds the annular seam; Step 5: Start the welding gun (30) to weld the pressure vessel.

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