Steel pipe welding device

Abstract

The invention relates to the technical field of automatic welding, and discloses a steel pipe welding device which comprises a handle and a sealing cover, a rotating ring and a driving mechanism are arranged in the sealing cover, the driving mechanism drives the rotating ring to rotate in the sealing cover, a welding mechanism moving along with the rotating ring is arranged on the inner side of the rotating ring, the welding mechanism comprises a tungsten pole, and an adjusting mechanism is arranged on the sealing cover. The adjusting mechanism changes the angle of the tungsten electrode column and the distance between the tungsten electrode column and a welding seam, an orbit fixing ring is arranged in the sealing cover and matched with the welding mechanism to adjust the height of a welding spot, and a retention mechanism for clamping a steel pipe is clamped to the top of the sealing cover. According to the steel pipe welding device, the problems that existing equipment is lack in the branch pipe welding field, the adaptability is poor, and the welding spot positioning precision is low are effectively solved, efficient, precise and automatic welding of regular and irregular welding seams is achieved, the steel pipe welding device can adapt to pipes of different specifications, and the practicability and the welding quality of the device are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of automatic welding technology, specifically to a steel pipe welding device. Background Technology

[0002] As a core pipe material in the industrial field, steel pipes are widely used in building structures, petrochemicals, long-distance oil and gas pipelines, municipal engineering and other scenarios. The quality of their connection directly determines the safety and service life of the pipeline system. Welding is a key process for steel pipe connection. Depending on the actual needs, steel pipe welding needs to deal with various weld joint forms, including regular circumferential seams formed by straight pipe butt joints and irregular weld joints formed by the intersection of main pipes and branch pipes (such as the saddle-shaped weld joint of tee joints). Among them, the weld joints of intersecting branch pipes are affected by the difference in the diameter and included angle of the two pipes, and the weld joints are mostly asymmetrical curved surface shapes, making the welding difficulty much higher than that of regular circumferential seams.

[0003] Currently, there are already automated welding equipment for straight pipe butt joints in the industry. These devices drive the welding mechanism to move by a preset circular trajectory, which can realize automated welding of regular circumferential seams and improve the efficiency and quality stability of straight pipe butt joints to a certain extent. However, in the field of branch pipe welding, due to the irregularity of the weld joint, the existing automated welding equipment cannot adapt to the complex weld seam trajectory and it is difficult to complete the automated welding of irregular weld seams, resulting in branch pipe welding still being mainly done manually.

[0004] Existing automated steel pipe welding equipment has significant limitations in applicability: on the one hand, it can only meet the welding requirements of regular circumferential seams such as straight pipe butt joints, and cannot be compatible with automated operations of irregular weld seams such as branch pipes, thus limiting its applicable scenarios; on the other hand, manual welding is not only inefficient, but the welding quality is also greatly affected by the operator's skill level and experience, and is prone to defects such as uneven weld beads, lack of fusion, and porosity. At the same time, in confined spaces, especially when branch lines are added to the main pipe in the pipe room, manual welding has significant limitations and cannot meet the development needs of modern industry for efficient, high-quality, and safe steel pipe welding. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned difficulties and provide a steel pipe welding device.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a steel pipe welding device, including a handle and a closed cover, a rotating ring and a driving mechanism are provided inside the closed cover, the driving mechanism drives the rotating ring to rotate inside the closed cover, and a welding mechanism that moves with the rotating ring is provided inside the rotating ring. The welding mechanism includes a floating platform, a lifting platform, an adjusting slider, a connecting plate, a fixed frame, and a tungsten electrode. The lifting platform is longitudinally slidable inside the floating platform, and the adjusting slider is laterally slidable inside the lifting platform. The top of the connecting plate is hinged to the adjusting slider, and the bottom is rotatably equipped with an insulating cap that fixes the tail of the tungsten electrode. The fixed frame is fixed inside the rotating ring, and a slip ring that slides with the tungsten electrode is rotatably equipped on the fixed frame. The enclosure is equipped with an adjustment mechanism, which changes the angle of the tungsten electrode and the distance from the weld by changing the position of the lifting platform and the adjusting slider. The enclosure is equipped with a guide ring, which works with the floating platform to adjust the height of the weld point. The top of the enclosure is fitted with a fixing mechanism that clamps the steel pipe.

[0007] As an improvement: the enclosure, rotating ring, fixed track ring and fixing mechanism are all three-part split structures. The enclosure includes a fixed cover and two movable covers. The two movable covers are hinged to the fixed cover and connected by an external latch. The rotating ring includes a ring plate one and two ring plates two. The ring plate one and the two ring plates two abut against each other. The welding mechanism is located on the ring plate one.

[0008] As an improvement: a fixed rod is provided on the inner side of the ring plate, a wing plate that slides on the fixed rod is provided on the floating platform, a spring 2 connected to the wing plate is provided on the fixed rod, the bottom shape of the fixed rail ring matches the weld, and a roller that rotates with the bottom of the fixed rail ring is provided on the top of the floating platform.

[0009] As an improvement: the adjustment mechanism includes an adjustment knob, a guide slide, and a U-shaped platform. The guide slide is slidably disposed in a guide groove on the fixed cover. The adjustment knob is provided with a push rod that passes through the through hole of the guide slide. A spring is provided between the adjustment knob and the guide slide. The end of the push rod is rotatably connected to the U-shaped platform and is provided with a hexagonal insert that passes through the through hole on the U-shaped platform. The rear end of the lifting platform is inserted into the U-shaped platform. A threaded rod is rotatably provided on the inner side of the lifting platform. The adjustment slider is provided with a threaded hole that mates with the threaded rod. The end of the threaded rod is provided with a hexagonal slot that mates with the hexagonal insert.

[0010] As an improvement: the floating platform is symmetrically provided with side plates on one side, and multiple locking slots are provided on the side plates. The top of the lifting platform is provided with a baffle and a guide plate. A locking platform is slidably provided on the top of the lifting platform. A spring is provided between the locking platform and the baffle. A stop rod is provided on the locking platform. The stop rod passes through the through hole on the guide plate and cooperates with the U-shaped platform. The two ends of the locking platform are inserted into the locking slots.

[0011] As an improvement: a fixed platform is provided on the inner side of the ring plate, and a wire feeding mechanism is installed on the fixed platform. The wire feeding mechanism includes a connecting shell and a movable shell. The connecting shell and the movable shell are rotatably connected. The movable shell is provided with a tightening bolt that cooperates with the connecting shell. A friction ring is provided inside the closed cover. A friction wheel that cooperates with the friction ring is rotatably provided on the connecting shell. A pinch roller is rotatably provided inside the movable shell. The friction wheel drives the pinch roller to rotate through a transmission structure.

[0012] As an improvement: the retaining mechanism includes a buckle and a cover plate. The bottom of the buckle is provided with multiple locking platforms. The top and bottom of the cover plate are provided with locking grooves that cooperate with the locking platforms. The cover plate is installed inside the buckle, and a clamping ring is provided on the inner side of the cover plate.

[0013] The beneficial effects of this invention compared to existing technologies are as follows: The steel pipe welding device of this invention effectively solves the problems of existing equipment lacking application in branch pipe welding, poor adaptability, and low weld point positioning accuracy. It achieves efficient, precise, and automated welding of regular and irregular weld seams, can adapt to different specifications of pipe materials, and significantly improves the practicality of the device and the welding quality. Specifically: 1. An adjustment mechanism works in conjunction with the welding mechanism. Pushing the adjustment knob can release the lifting platform lock and adjust its height. Rotating the adjustment knob can drive the adjustment slider to move through the threaded rod, so as to achieve precise adjustment of the tungsten electrode angle and weld spacing. With the guide ring, it can guide the welding mechanism to move precisely along irregular welds, dynamically adapt to the weld height, avoid weld offset, and ensure that both regular and irregular welds can be stably formed. 2. The enclosure, rotating ring, guide ring and fixing mechanism all adopt a three-part structure. The steel pipe to be welded can be easily loaded and unloaded by opening the movable cover. It is especially suitable for installed pipelines or long steel pipes. It solves the problem of inconvenience in loading and unloading steel pipes in special scenarios by the traditional integral structure. At the same time, by changing the cover plate and clamping ring of different sizes, it can adapt to the welding needs of steel pipes of various diameters, thus broadening the application range of the device. 3. When the wire feeding mechanism rotates with the rotating ring, the friction wheel and the friction ring inside the closed cover rotate together. The feeding roller is driven by the bevel gear and gear set to feed the welding wire. The wire feeding speed is synchronized with the rotation rhythm of the rotating ring, which avoids welding defects caused by feeding the welding wire too fast or too slow, and improves welding continuity and efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0016] Figure 3 This is an exploded view of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of the enclosure of the present invention.

[0018] Figure 5 This is a cross-sectional view of the enclosure of the present invention.

[0019] Figure 6 This is a cross-sectional view of the positioning mechanism of the present invention.

[0020] Figure 7This is a schematic diagram of the rotating ring and driving mechanism of the present invention.

[0021] Figure 8 This is a schematic diagram of the welding mechanism of the present invention.

[0022] Figure 9 This is a cross-sectional view of the welding mechanism of the present invention.

[0023] Figure 10 This is an exploded view of the welding mechanism of the present invention.

[0024] Figure 11 This is an exploded view of the lifting platform of the present invention.

[0025] Figure 12 This is a schematic diagram of the adjustment mechanism of the present invention.

[0026] Figure 13 This is a schematic diagram of the wire feeding mechanism of the present invention.

[0027] Figure 14 This is an exploded view of the wire feeding mechanism of the present invention.

[0028] Figure 15 This is a partial structural schematic diagram of the wire feeding mechanism of the present invention.

[0029] Figure 16 This is a schematic diagram of the structure of the track-setting ring of the present invention.

[0030] Figure 17 This is an exploded view of the retention mechanism of the present invention.

[0031] As shown in the figure: 1. Handle; 2. Enclosed cover; 3. Rotary ring; 4. Drive mechanism; 5. Welding mechanism; 6. Adjustment mechanism; 7. Wire feeding mechanism; 8. Track guide ring; 9. Fixing mechanism; 21. Fixed cover; 211. Guide groove; 22. Movable cover; 23. Friction ring; 24. Copper ring; 25. Mounting groove; 26. Positioning mechanism; 261. Positioning knob; 262. Threaded groove tube; 263. Spring 1; 264. Positioning rod 27. Lock; 28. Slot; 31. Ring plate one; 311. Fixing rod; 312. Spring two; 313. Fixing platform; 32. Ring plate two; 321. Positioning slot; 33. Gear ring; 34. Vent groove; 41. Motor; 42. Synchronous pulley; 43. Internal toothed belt; 44. Gear one; 45. Gear two; 51. Floating platform; 511. Wing plate; 512. Side plate; 513. Locking slot; 514. Roller; 5 2. Lifting platform; 521. Baffle; 522. Spring 3; 523. Guide plate; 524. Locking platform; 525. Support rod; 53. Adjusting slider; 54. Threaded rod; 541. Hexagonal slot; 55. Connecting plate; 551. Insulating cap; 56. Fixing bracket; 561. Fixing plate; 562. Slip ring; 57. Tungsten electrode; 61. Adjusting knob; 62. Push rod; 621. Hexagonal insertion platform; 63. Guide slide; 64. U-shaped platform; 65. Spring 4; 71. Connecting shell; 711. Retaining ring; 72. Movable shell; 721. Tightening bolt; 73. Friction wheel; 731. Bevel gear 1; 74. Pinch roller; 741. Gear 3; 75. Bevel gear 2; 751. Gear 4; 76. Gear 5; 761. Gear 6; 81. Mounting plate; 82. Positioning platform; 83. Profile plate; 91. Buckle ring; 92. Clamping platform; 93. Cover plate; 94. Clamping ring. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 8 As shown, a steel pipe welding device includes a handle 1 and a closed cover 2. The closed cover 2 is provided with a rotating ring 3 and a driving mechanism 4. The driving mechanism 4 drives the rotating ring 3 to rotate inside the closed cover 2. The inner side of the rotating ring 3 is provided with a welding mechanism 5 that moves with the rotating ring 3. The welding mechanism 5 includes a tungsten electrode 57. The closed cover 2 is provided with an adjustment mechanism 6. The adjustment mechanism 6 changes the angle of the tungsten electrode 57 and the distance between it and the weld. The closed cover 2 is provided with a guide ring 8. The guide ring 8 cooperates with the welding mechanism 5 to adjust the height of the weld point. The top of the closed cover 2 is provided with a fixing mechanism 9 for clamping the steel pipe.

[0034] This steel pipe welding device mainly solves problems such as the lack of automated equipment for branch pipe welding, poor adaptability of steel pipe welding, low positioning accuracy of weld points during steel pipe welding, inconvenience in adjusting the angle and spacing of tungsten electrode columns, easy deviation of steel pipes during welding, and difficulty in accurately controlling the height of weld points. It achieves efficient and precise steel pipe welding operations through the coordinated action of various mechanisms.

[0035] In actual operation, the steel pipe to be welded is first securely clamped by the fixing mechanism 9 at the top of the enclosed cover 2 to ensure that the steel pipe will not shift during welding, laying the foundation for subsequent precise welding. According to the welding requirements, the angle of the tungsten electrode 57 in the welding mechanism 5 and its distance from the weld are adjusted by the adjustment mechanism 6 set on the enclosed cover 2, so that the tungsten electrode 57 can be in the most suitable welding position to ensure welding quality. At the same time, the movement trajectory of the welding mechanism 5 is restricted and guided by the guide ring 8, thereby precisely adjusting the height of the weld point during movement and further improving the welding accuracy.

[0036] Once all parameters are adjusted, the drive mechanism 4 inside the enclosure 2 is activated. The drive mechanism 4 will drive the rotating ring 3 to rotate within the enclosure 2 at a preset speed and trajectory. The welding mechanism 5 installed inside the rotating ring 3 will move along with the rotating ring 3. During the movement, the tungsten electrode 57 in the welding mechanism 5 will continuously perform welding operations on the weld seam of the steel pipe until the welding work of the entire steel pipe weld seam is completed. The entire process is carried out under the protection of the enclosure 2, which can effectively prevent the spatter generated during the welding process from affecting the surrounding environment and operators.

[0037] Combined with appendix Figure 3 Appendix Figure 4 and attached Figure 7 As shown, the enclosed cover 2, rotating ring 3, fixed track ring 8 and fixing mechanism 9 all adopt a three-part split structure. The enclosed cover 2 includes a fixed cover 21 and two movable covers 22. The handle 1 is connected to the fixed cover 21. The two movable covers 22 are hinged to the fixed cover 21. The two movable covers 22 are connected by an external latch 27. The rotating ring 3 includes a ring plate 31 and two ring plates 32. The ring plate 31 and the two ring plates 32 abut against each other. The welding mechanism 5 is provided on the ring plate 31.

[0038] By changing the structure of the enclosure 2, rotating ring 3, track-fixing ring 8, and fixing mechanism 9, the problems of inconvenience in loading and unloading steel pipes of different lengths or diameters and inability to install on already installed pipelines by the traditional integral structure are further solved. Through the coordination of the three-part split structure and each functional mechanism, more efficient, flexible and precise steel pipe welding operations are achieved.

[0039] In actual operation, firstly, open the external latch 27 of the closed cover 2, and flip the two movable covers 22 that are hinged to the fixed cover 21 outward. At this time, the three-part structure of the closed cover 2, the rotating ring 3, the guide ring 8 and the fixing mechanism 9 are all in the open state, which makes it easy to place the steel pipe to be welded stably in the clamping area of ​​the fixing mechanism 9. Compared with the integral structure, it greatly reduces the difficulty of loading and unloading the steel pipe, especially suitable for long or already installed steel pipes. Then, close the two movable covers 22 and lock them with the latch 27, so that the closed cover 2 forms a complete protective space. At the same time, the two ring plates 2 and 32 are re-aggregated with the ring plate 1 to form a complete rotating ring 3. The guide ring 8 and the fixing mechanism 9 are also closed and reset. After closing, the fixing mechanism 9 firmly clamps the steel pipe and fixes the steel pipe or fixes the device through the already fixed steel pipe.

[0040] During welding, the drive mechanism 4 drives the rotating ring 3 to rotate inside the enclosed cover 2. The drive mechanism 4 drives the ring plate 31 or ring plate 32 passing through the fixed cover 21 in sequence. By pushing, the rotating ring 3 rotates as a whole inside the enclosed cover 2. The three-part structure of the enclosed cover 2 not only ensures the protective effect and avoids welding spatter from affecting the environment and operators, but also allows for easy opening and removal of the steel pipe after welding. At the same time, the three-part structure of the rotating ring 3, the guide ring 8, and the fixing mechanism 9 also facilitates the later inspection and replacement of components, improving the overall flexibility of use and the convenience of maintenance of the device.

[0041] Combined with appendix Figure 1 and attached Figure 7 As shown, the drive mechanism 4 includes a motor 41, a synchronous pulley 42, and a second gear 45. Two sets of synchronous pulleys 42 and the second gear 45 are symmetrically rotated and located on the inner side of the handle 1 end. The motor 41 is fixed on the outer side of the handle 1 end. The output end of the motor 41 is connected to one of the synchronous pulleys 42. The two synchronous pulleys 42 are connected by an internal toothed belt 43. The bottom of the synchronous pulley 42 is provided with a first gear 44 that meshes with the second gear 45. The outer side of the rotating ring 3 is provided with a toothed ring 33 that meshes with the second gear 45.

[0042] As the core power component of the improved steel pipe welding device, the drive mechanism 4 mainly solves the problems of low power transmission efficiency and insufficient operational stability in the traditional drive method. Through the coordinated transmission of the motor 41, synchronous pulley 42, gear set and gear ring 33, it provides stable, uniform and precisely controllable rotational power to the rotating ring 3, ensuring that the welding mechanism 5 can move smoothly along the preset trajectory, thereby ensuring the welding quality. Since the ring plate 31 is provided with guide groove 211, in order to avoid the problem of transmission jamming or failure of the drive mechanism 4, two sets of synchronous pulleys 42 and gear sets are set so that the rotating ring 3 can rotate continuously and smoothly.

[0043] In actual operation, after the device completes the clamping of the steel pipe, the adjustment of the angle and spacing of the tungsten electrode 57, and the calibration of the weld height, the motor 41 is started. The output end of the motor 41 transmits power to one of the synchronous pulleys 42 directly connected to it, causing the synchronous pulley 42 to start rotating. Since the two synchronous pulleys 42 are connected by the internal toothed belt 43, the rotating synchronous pulley 42 will drive the other symmetrically arranged synchronous pulley 42 to rotate synchronously through the internal toothed belt 43, realizing the synchronous transmission of power between the two sets of transmission structures. As the synchronous pulley 42 rotates, the gear 1 44 meshing with it also rotates synchronously. The gear 1 44 further transmits power to the gear 2 45 meshing with it. The rotating gear 2 45 will drive the rotating ring 3 to rotate inside the closed cover 2 through the toothed ring 33.

[0044] Combined with appendix Figure 6 and attached Figure 7 As shown, one of the movable covers 22 has a positioning mechanism 26 on its outer side. The positioning mechanism 26 includes a positioning knob 261. The inner side of the positioning knob 261 has a threaded groove tube 262. The outer side of the movable cover 22 has a threaded hole that mates with the threaded groove tube 262. The inner side of the threaded groove tube 262 has a spring 263. The inner side of the threaded groove tube 262 has a positioning rod 264 that slides. The second ring plate 32 has a positioning slot 321. One end of the positioning rod 264 is connected to the spring 263, and the other end passes through the through holes on the movable cover 22 and the threaded groove tube 262 and is inserted into the positioning slot 321.

[0045] Positioning mechanism 26, as an important auxiliary structure of the improved steel pipe welding device, mainly solves the problem of inaccurate repositioning of ring plate 31 in fixed cover 21 when the rotating ring 3 rotates and resets in the closed cover 2. Through mechanical insertion and elastic reset structure, it achieves accurate positioning of the rotating ring 3 and the closed cover 2 during the reset process.

[0046] In actual operation, during the reset process after welding, the positioning mechanism 26 needs to be adjusted to fix the position of the ring plate 22. During welding, the positioning rod 264 is located in the groove of the movable cover 22, with its end maintaining a certain distance from the rotating ring 3. During reset, the operator needs to rotate the positioning knob 261. Since the threaded groove tube 262 on the inner side of the positioning knob 261 is threadedly engaged with the threaded hole on the movable cover 22, the threaded groove tube 262 will move towards the inner side of the movable cover 22 as the knob rotates until the end of the threaded groove tube 262 is in contact with the inner side of the movable cover 22. At this time, under the push of the spring 263, the positioning rod 264... 4. As the positioning knob 261 moves, the positioning rod 264 abuts against the outside of the rotating ring 3, compressing the spring 263. Then, the rotating ring 3 is slowly rotated by the drive mechanism 4 until the positioning slot 321 is aligned with the through hole on the movable cover 22 and the threaded groove tube 262. At this time, the spring 263 releases its elastic potential energy, pushing the positioning rod 264 into the positioning slot 321, and firmly connecting the ring plate 32 to the movable cover 22. At this time, the parts of the rotating ring 3 are aligned with the parts of the closed cover 2, making it easy to open the closed cover 2. Before the next welding operation, the positioning knob 261 needs to be rotated to release the restriction on the ring plate 32.

[0047] Combined with appendix Figure 3 Appendix Figure 8 Appendix Figure 9 and attached Figure 10 As shown, the welding mechanism 5 includes a floating platform 51, a lifting platform 52, an adjusting slider 53, a connecting plate 55, a fixing frame 56, and a tungsten electrode 57. The lifting platform 52 is longitudinally slidably disposed inside the floating platform 51, and the adjusting slider 53 is laterally slidably disposed inside the lifting platform 52. The top of the connecting plate 55 is hinged to the adjusting slider 53, and the bottom is rotatably provided with an insulating cap 551 for fixing the tail of the tungsten electrode 57. The fixing frame 56 is fixed inside the rotating ring 3, and a slip ring 562 that slides and engages with the tungsten electrode 57 is rotatably disposed on the fixing frame 56.

[0048] The welding mechanism 5 mainly solves the problems of inflexible adjustment of the height, horizontal position and welding angle of the tungsten electrode in traditional welding components, making it difficult to adapt to the welding requirements of different steel pipes, and the tungsten electrode is prone to shaking during operation. It achieves precise positioning and stable operation of the tungsten electrode through the cooperation of multiple components.

[0049] During operation, the fixed frame 56, being fixed inside the rotating ring 3, moves synchronously with the rotation of the rotating ring 3. The sliding ring 562, rotating at its top, slides in conjunction with the tungsten electrode 57. This serves two purposes: firstly, it provides radial limiting for the tungsten electrode 57, preventing it from shifting left or right during welding; secondly, the sliding ring 562 can rotate flexibly with the angle adjustment or movement of the tungsten electrode 57, without affecting its adjustment and working trajectory. When the angle of the tungsten electrode 57 needs to be changed, the lifting platform 52 is pushed up and down along the sliding path inside the floating platform 51. The lifting platform 52 then moves the tail of the tungsten electrode 57 up and down via the adjusting slider 53 and connecting plate 55, thus changing the angle of the tungsten electrode 57. If the distance between the working end of the tungsten electrode 57 and the weld seam needs to be adjusted, the adjusting slider 53 is pushed left and right along the sliding path inside the lifting platform 52, which in turn moves the connecting plate 55 and the tungsten electrode 57 to achieve horizontal position adjustment, ensuring that the tungsten electrode 57 is aligned with the weld seam.

[0050] Since the position of the slip ring 562 remains unchanged, adjusting the position of either the lifting platform 52 or the adjusting slider 53 will simultaneously change the angle of the tungsten electrode 57 and the distance between it and the weld. However, the adjustment ranges of the two are different. When precise alignment is required, both the lifting platform 52 and the adjusting slider 53 need to be adjusted. After the height, horizontal position, and welding angle of the tungsten electrode 57 are adjusted to the correct position, the rotating ring 3 rotates under the drive mechanism, and the welding mechanism 5 moves as a whole with the rotating ring 3. Under the limiting and guiding effect of the slip ring 562 and the positioning effect of each adjusting component, the tungsten electrode 57 stably performs continuous welding operations on the steel pipe weld.

[0051] Combined with appendix Figure 5 Appendix Figure 7 and attached Figure 8 As shown, the inner side of the enclosure 2 is provided with a copper ring 24 connected to the welding point. The separate copper rings 24 abut against each other when the enclosure 2 is closed. The fixing bracket 56 is provided with a fixing plate 561 fixed on the rotating ring 3. The fixing plate 561 slides with the copper ring 24. The fixing bracket 56, the fixing plate 561 and the sliding ring 562 are all made of copper. The insulating cap 551 is made of insulating material. The part of the enclosure 2 that contacts the copper ring 24 is made of insulating material.

[0052] The electrical connection structure of the tungsten electrode 57 mainly solves the problems in this device, such as the split structure that easily leads to interruption of current transmission, poor contact of conductive parts affecting welding stability when the rotating ring rotates, and the risk of leakage between metal parts. Through the precise cooperation of copper conductive components and insulating components, the welding current is stably transmitted to the tungsten electrode 57, while ensuring operational safety.

[0053] During operation, the two movable covers 22 of the enclosed cover 2 are first closed and locked with the latch 27. At this time, the copper rings 24 separately set on the inner side of the enclosed cover 2 abut against each other as the enclosed cover 2 closes, forming a complete annular conductive structure. Since the fixing plate 561 on the fixing frame 56 is fixed on the rotating ring 3 and the fixing plate 561 slides with the copper ring 24, when the driving mechanism drives the rotating ring 3 to rotate, the fixing plate 561 will rotate synchronously with the rotating ring 3, while maintaining close contact with the copper ring 24 to prevent the rotation of the rotating ring 3 from causing the conductivity to be interrupted. Since the fixing frame 56, the fixing plate 561 and the slip ring 562 are all made of copper with excellent conductivity, the welding current can be transmitted sequentially through the copper ring 24 to the fixing plate 561, then through the fixing plate 561 to the fixing frame 56, and then through the fixing frame 56 to the slip ring 562. The slip ring 562 slides with the tungsten electrode 57, so the current can be smoothly transmitted from the slip ring 562 to the tungsten electrode 57, providing the tungsten electrode 57 with the stable current required for welding.

[0054] During this process, the insulating cap 551 is made of insulating material, which can not only fix the tail of the tungsten electrode 57, but also block the current conduction between the tungsten electrode 57 and the connecting plate 55, thus avoiding current shunting. The part of the enclosure 2 that contacts the copper ring 24 is also made of insulating material, which can prevent the current from being conducted from the copper ring 24 to the main body of the enclosure 2, thus avoiding the risk of leakage caused by the enclosure 2 being energized. Finally, with the synergistic effect of each copper conductive component, the welding current is stably transmitted to the tungsten electrode 57, meeting the current requirements of the welding operation. At the same time, the insulating components effectively isolate unrelated metal components, ensuring the safety and reliability of the entire electrical connection process.

[0055] Combined with appendix Figure 3 Appendix Figure 11 and attached Figure 12 As shown, the adjustment mechanism 6 includes an adjustment knob 61, a guide slide 63, and a U-shaped platform 64. The guide slide 63 is slidably disposed in the guide groove 211 on the fixed cover 21. The adjustment knob 61 is provided with a push rod 62 passing through the through hole of the guide slide 63. A spring 65 is provided between the adjustment knob 61 and the guide slide 63. The end of the push rod 62 is rotatably connected to the U-shaped platform 64 and is provided with a hexagonal insert 621 passing through the through hole on the U-shaped platform 64. The rear end of the lifting platform 52 is inserted into the U-shaped platform 64. A threaded rod 54 is rotatably provided on the inner side of the lifting platform 52. The adjustment slider 53 is provided with a threaded hole that mates with the threaded rod 54. The end of the threaded rod 54 is provided with a hexagonal slot 541 that mates with the hexagonal insert 621.

[0056] Combined with appendix Figure 9 Appendix Figure 11 and attached Figure 12As shown, the floating platform 51 has symmetrical side plates 512 on one side, and multiple locking slots 513 are provided on the side plates 512. The top of the lifting platform 52 is provided with a baffle 521 and a guide plate 523. A locking platform 524 is slidably provided on the top of the lifting platform 52. A spring 522 is provided between the locking platform 524 and the baffle 521. A stop rod 525 is provided on the locking platform 524. The stop rod 525 passes through the through hole on the guide plate 523 and cooperates with the U-shaped platform 64. The two ends of the locking platform 524 are inserted into the locking slots 513.

[0057] As the core adjustment component of the device, the adjustment mechanism 6 mainly adjusts the welding mechanism 5. It works with the welding mechanism 5 to solve the problems of cumbersome operation steps when adjusting the height and horizontal position of the tungsten electrode 57, and the easy displacement of the lifting platform due to vibration or external force after adjustment, which causes the welding parameters to deviate from the preset value. Through the coordination of mechanical transmission, elastic reset and pin locking, the precise adjustment and stable locking of the height and horizontal position of the tungsten electrode are achieved, ensuring welding accuracy.

[0058] During operation, if the height of the lifting platform 52 needs to be adjusted, first push the adjustment knob 61, and push the push rod 62 to move the U-shaped platform 64 towards the lifting platform 52, so that the rear end of the lifting platform 52 is inserted into the U-shaped platform 64, compressing the spring 65. The end of the U-shaped platform 64 will push the abutment 525 to move along the through hole on the guide plate 523. The abutment 525 drives the locking platform 524 to slide towards the baffle 521, compressing the spring 522, so that both ends of the locking platform 524 disengage from the locking slots 513 of the side plate 512, releasing the locking restriction of the lifting platform 52. Then, move the adjustment knob 61 up and down to adjust the height position of the lifting platform 52 inside the floating platform 51. When the adjustment knob 61 is reset, the spring 522 pushes the locking platform 524 to move, and both sides of the locking platform 524 are reinserted into the locking slots 513, completing the locking operation of the lifting platform 52.

[0059] To adjust the height of the lifting platform 52, push the adjustment knob 61 to insert the rear end of the lifting platform 52 into the U-shaped platform 64. Continue pushing the adjustment knob 61 to insert the hexagonal insert 621 at the end of the push rod 62 into the hexagonal slot 541 of the threaded rod 54. Rotating the adjustment knob 61 drives the threaded rod 54 to rotate synchronously through the push rod 62. The threaded hole on the adjusting slider 53 engages with the threaded rod 54. The rotation of the threaded rod 54 drives the adjusting slider 53 to slide along the inner side of the lifting platform 52, thereby adjusting the position of the adjusting slider 53 inside the lifting platform 52. Stop rotating the adjustment knob 61. The threaded engagement between the threaded rod 54 and the adjusting slider 53 forms a self-locking mechanism. At the same time, the height locking structure of the lifting platform remains stable, providing double protection to prevent the tungsten electrode from shifting position and meeting the parameter accuracy requirements of welding operations.

[0060] Combined with appendix Figure 3 Appendix Figure 7 Appendix Figure 8 and attached Figure 16 As shown, the inner side of the ring plate 31 is provided with a fixed rod 311, the floating platform 51 is provided with a wing plate 511 that slides on the fixed rod 311, the fixed rod 311 is provided with a spring 312 connected to the wing plate 511, the fixed track ring 8 includes a mounting plate 81, the mounting plate 81 is installed in the mounting groove 25 inside the enclosure 2, the top of the mounting plate 81 is provided with a positioning platform 82, the mounting groove 25 is provided with a groove that slides with the positioning platform 82, the bottom of the mounting plate 81 is provided with a profile plate 83, the bottom shape of the profile plate 83 matches the weld, and the top of the floating platform 51 is provided with a roller 514 that rotatably cooperates with the bottom of the profile plate 83.

[0061] As a core component ensuring the welding trajectory and weld point height of the device, the guide ring 8 mainly solves the problem that traditional welding equipment cannot automatically weld irregular welds and that the weld point height is difficult to dynamically adapt to the weld shape, resulting in uneven welding quality. Through sliding cooperation with the welding mechanism, elastic self-adaptation and trajectory limit design, it achieves precise following of the welding mechanism along the weld and dynamic stability of the weld point height, ensuring the quality of weld formation.

[0062] During operation, the mounting plate 81 of the guide ring 8 is first embedded into the mounting groove 25 inside the enclosure 2. The positioning platform 82 on the top of the mounting plate 81 slides into the groove in the mounting groove 25 to ensure that the mounting plate 81 is fixed in position inside the enclosure 2, preventing the guide ring 8 from shifting and affecting the trajectory guidance. Since the bottom shape of the template 83 matches the weld, and the roller 514 on the top of the floating platform 51 matches the bottom of the template 83, when the drive mechanism drives the rotating ring 3 to rotate, the fixing rod 311 on the inner ring plate 31 of the rotating ring 3 moves synchronously with the rotating ring. The floating platform 51 slides on the fixing rod 311 through the wing plate 511, and the spring 312 supports the wing plate 511. An upward thrust is applied to keep the roller 514 in constant contact with the bottom of the template 83. The template 83 then limits the movement trajectory of the floating table 51 through the roller 514, ensuring that the floating table 51 drives the welding mechanism to move precisely along the weld direction and preventing the welding mechanism from deviating from the weld. The mating structure of the mounting plate 81 and the mounting groove 25 can also be separated and assembled synchronously with the three-part structure of the enclosure 2 during the disassembly and assembly of the device, without affecting the overall ease of operation of the device. Finally, through the trajectory limiting and elastic adaptive effect of the guide ring 8, the welding mechanism can accurately follow the weld and the weld height can be dynamically stabilized, ensuring that the weld formation is uniform and the quality is reliable throughout the welding process.

[0063] The single-piece plate 83 can adopt a double-layer structure, with the upper layer being the mounting platform and the lower layer being the guide platform. When facing uncommon main and branch pipe matching dimensions and requiring high welding accuracy, the length, width, and depth of the weld can be measured first, and a small-volume guide platform can be quickly printed by 3D and installed on the mounting platform to meet the usage requirements. In addition, when welding two straight pipes, the guide ring 8 is not required, and the welding trajectory is circular.

[0064] Combined with appendix Figure 3 Appendix Figure 7 Appendix Figure 13 Appendix Figure 14 and attached Figure 15 As shown, a fixed platform 313 is provided on the inner side of the ring plate 31. A wire feeding mechanism 7 is installed on the fixed platform 313. The wire feeding mechanism 7 includes a connecting shell 71 and a movable shell 72. A retaining ring 711 is provided at one end of the connecting shell 71. The retaining ring 711 is rotatably connected to the movable shell 72. A tightening bolt 721 that cooperates with the retaining ring 711 is provided on the movable shell 72. A friction ring 23 is provided on the inner side of the closed cover 2. A friction wheel 73 that cooperates with the friction ring 23 is rotatably provided on the connecting shell 71. A rotatable mechanism 73 is provided inside the connecting shell 71. There are bevel gear 2 75 and gear 5 76. The bottom of the friction wheel 73 is provided with bevel gear 1 731 that meshes with bevel gear 2 75. Bevel gear 2 75 is coaxially connected with gear 4 751 that meshes with gear 5 76. Inside the movable housing 72, there is gear 6 761 that is coaxially connected with gear 5 76. Inside the movable housing 72, there is a rotatable pinch roller 74. At the end of the pinch roller 74, there is gear 3 741. The gears 3 741 of the two pinch rollers 74 mesh, and one of the gears 3 741 meshes with gear 6 761.

[0065] As a key auxiliary component of the steel pipe welding device, the wire feeding mechanism 7 mainly solves the problems of asynchronous wire feeding speed and the movement rhythm of the welding mechanism driven by the rotating ring, uneven wire feeding force leading to unstable wire feeding, and cumbersome disassembly and assembly of wire feeding components that are inconvenient to maintain during the traditional wire feeding process. Through the linkage design with the rotating ring and the enclosed cover, it achieves precise matching and feeding of the welding wire and the welding operation, ensuring continuous and stable welding process.

[0066] During operation, the connecting shell 71 is installed on the fixed platform 313 inside the ring plate 31, so that the friction wheel 73 on the connecting shell 71 is in contact with the friction ring 23 inside the closed cover 2. Then, the welding wire is inserted into the through hole of the movable shell 72, and the angle is adjusted according to the protruding welding wire. During adjustment, the movable shell 72 is rotated. After adjustment, the movable shell 72 of the wire feeding mechanism 7 is abutted against the retaining ring 711 by tightening the bolt 721. When the drive mechanism drives the rotating ring 3 to rotate, the fixed platform 313 drives the wire feeding mechanism 7 to rotate around the steel pipe. At this time, the friction wheel 73 slides relative to the stationary friction ring 23 due to contact, and then rotates. The bevel teeth 731 at the bottom of the friction wheel 73 follow the friction wheel 73. The rotation drives the bevel gear 2 75, which meshes with it, to rotate. The gear 4 751, which is coaxially connected to the bevel gear 2 75, rotates synchronously. The gear 4 751 then drives the gear 5 76, which meshes with it, to rotate. The gear 5 76 is coaxial with the gear 6 761 inside the movable housing 72. After the gear 6 761 rotates with the gear 5 76, it drives the gear 3 741 at the end of one of the pinch rollers 74, which meshes with it, to rotate. Since the gears 3 741 of the two pinch rollers 74 mesh with each other, the other pinch roller 74 also rotates in the opposite direction. The two pinch rollers 74 together continuously and evenly feed the welding wire towards the weld seam, and the wire feeding speed is synchronously adjusted with the rotation speed of the rotating ring 3 to ensure that the amount of welding wire fed is precisely matched with the welding rhythm.

[0067] When welding irregular welds, an insulating sleeve needs to be installed at the rear of the tungsten electrode post 57. The welding wire is inserted into the insulating sleeve. At this time, the tightening bolt 721 is loosened so that the connecting shell 71 and the movable shell 72 remain rotatably connected. When the floating table 51 is adaptively adjusted according to the bottom height of the fixed track ring 8, the tungsten electrode post 57 moves up and down. Through the cooperation of the insulating sleeve and the welding wire, the movable shell 72 rotates and follows the angle adjustment of the welding wire. When welding thin-walled tubes, the wire feeding mechanism 7 is not required and can be removed from the fixed table 313.

[0068] Combined with appendix Figure 4 and attached Figure 17 As shown, the retaining mechanism 9 includes a buckle 91 and a cover plate 93. The buckle 91 has multiple locking platforms 92 at its bottom. The top and bottom of the closed cover 2 are provided with locking grooves 28 that cooperate with the locking platforms 92. The cover plate 93 is installed inside the buckle 91, and a clamping ring 94 is provided on the inner side of the cover plate 93.

[0069] The fixing mechanism 9 mainly solves the problems of axial or radial displacement of steel pipes during welding due to factors such as the rotation of the swivel ring and welding vibration, as well as the poor adaptability of traditional fixing structures to steel pipes of different diameters and the inconvenience of loading and unloading. By combining the snap-fit ​​fixing with the quick-release structure, it achieves stable positioning of the steel pipe, while taking into account both ease of operation and pipe diameter adaptability.

[0070] During operation, firstly, select a suitable clamping ring 94 according to the diameter of the steel pipe to be welded, and install the cover plate 93 inside the buckle 91 so that the clamping ring 94 is in the central area of ​​the buckle 91. Then, align the multiple locking platforms 92 at the bottom of the buckle 91 with the locking groove 28 at the top of the closed cover 2. Through the insertion and cooperation of the locking platforms 92 and the locking groove 28, the buckle 91 is fixed on the closed cover 2, completing the connection and fixation between the fixing mechanism 9 and the closed cover 2. Then, as the closed cover 2 closes, the fixing mechanism 9 causes the separate clamping rings 94 to merge into a circular clamping steel pipe, forming a clamping force on the steel pipe and restricting the movement of the steel pipe.

[0071] For steel pipes of different diameters, the fixing mechanism 9 can be adapted to various specifications of steel pipes by replacing the cover plate 93 and clamping ring 94 of different sizes, thereby improving the versatility of the device. When welding two straight pipes, the fixing mechanism 9 is installed in the slot 28 at the bottom of the closed cover 2. The two fixing mechanisms 9 clamp the two straight pipes at the same time, which plays the role of axial alignment and fixation.

[0072] When the sealed cover 2 is closed, the separate cover plates 93 are combined into a single sealed plate, which, together with the sealed cover 2, forms a single-outlet mouth body that only allows gas to exit from the bottom. The argon gas delivery pipe inside the handle 1 is delivered to the inner cavity of the sealed cover 2 through the through hole on the fixed cover 21, and then through the ventilation groove 34 on the rotating ring 3, so that the argon gas flows through the welding area to form a welding gas protection. Alternatively, a through hole can be opened on the cover plate 93 to deliver argon gas to the inner cavity of the sealed cover 2 through this through hole.

[0073] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A steel pipe welding device, comprising a handle (1) and a closed cover (2), wherein a rotating ring (3) and a driving mechanism (4) are provided inside the closed cover (2), the driving mechanism (4) drives the rotating ring (3) to rotate inside the closed cover (2), and a welding mechanism (5) is provided inside the rotating ring (3) to follow the movement of the rotating ring (3), characterized in that: The welding mechanism (5) includes a floating platform (51), a lifting platform (52), an adjusting slider (53), a connecting plate (55), a fixing frame (56), and a tungsten electrode post (57). The lifting platform (52) is longitudinally slidably disposed inside the floating platform (51), and the adjusting slider (53) is laterally slidably disposed inside the lifting platform (52). The top of the connecting plate (55) is hinged to the adjusting slider (53), and the bottom is rotatably provided with an insulating cap (551) for fixing the tail of the tungsten electrode post (57). The fixing frame (56) is fixed inside the rotating ring (3), and a slip ring (562) that slides with the tungsten electrode post (57) is rotatably disposed on the fixing frame (56). The enclosure (2) is provided with an adjustment mechanism (6). The adjustment mechanism (6) changes the angle of the tungsten electrode (57) and the distance from the weld by changing the position of the lifting platform (52) and the adjusting slider (53). The enclosure (2) is provided with a fixed rail ring (8). The fixed rail ring (8) cooperates with the floating platform (51) to adjust the height of the weld point. The top of the enclosure (2) is provided with a fixing mechanism (9) for clamping the steel pipe.

2. The steel pipe welding device according to claim 1, characterized in that: The closed cover (2), rotating ring (3), fixed track ring (8) and fixing mechanism (9) all adopt a three-part split structure. The closed cover (2) includes a fixed cover (21) and two movable covers (22). The two movable covers (22) are hinged to the fixed cover (21). The two movable covers (22) are connected by an external latch (27). The rotating ring (3) includes a ring plate one (31) and two ring plates two (32). The ring plate one (31) and the two ring plates two (32) abut against each other. The welding mechanism (5) is located on the ring plate one (31).

3. The steel pipe welding device according to claim 2, characterized in that: The inner side of the ring plate (31) is provided with a fixed rod (311), the floating platform (51) is provided with a wing plate (511) that slides on the fixed rod (311), the fixed rod (311) is provided with a spring (312) connected to the wing plate (511), the bottom shape of the fixed rail ring (8) matches the weld, and the top of the floating platform (51) is provided with a roller (514) that rotatably cooperates with the bottom of the fixed rail ring (8).

4. The steel pipe welding device according to claim 2, characterized in that: The adjustment mechanism (6) includes an adjustment knob (61), a guide slide (63), and a U-shaped platform (64). The guide slide (63) is slidably disposed in the guide groove (211) on the fixed cover (21). The adjustment knob (61) is provided with a push rod (62) that passes through the through hole of the guide slide (63). A spring (65) is provided between the adjustment knob (61) and the guide slide (63). The end of the push rod (62) is rotatably connected to the U-shaped platform (64) and is provided with a hexagonal insert (621) that passes through the through hole on the U-shaped platform (64). The rear end of the lifting platform (52) is inserted into the U-shaped platform (64). A threaded rod (54) is rotatably provided on the inner side of the lifting platform (52). The adjustment slider (53) is provided with a threaded hole that mates with the threaded rod (54). The end of the threaded rod (54) is provided with a hexagonal slot (541) that mates with the hexagonal insert (621).

5. A steel pipe welding device according to claim 4, characterized in that: The floating platform (51) is symmetrically provided with side plates (512) on one side. Multiple locking slots (513) are provided on the side plates (512). The top of the lifting platform (52) is provided with a baffle (521) and a guide plate (523). The top of the lifting platform (52) is slidably provided with a locking platform (524). A spring (522) is provided between the locking platform (524) and the baffle (521). A stop rod (525) is provided on the locking platform (524). The stop rod (525) passes through the through hole on the guide plate (523) and cooperates with the U-shaped platform (64). The two ends of the locking platform (524) are inserted into the locking slots (513).

6. The steel pipe welding device according to claim 2, characterized in that: The inner side of the ring plate (31) is provided with a fixed platform (313), and a wire feeding mechanism (7) is installed on the fixed platform (313). The wire feeding mechanism (7) includes a connecting shell (71) and a movable shell (72). The connecting shell (71) and the movable shell (72) are rotatably connected. The movable shell (72) is provided with a tightening bolt (721) that cooperates with the connecting shell (71). The inner side of the closed cover (2) is provided with a friction ring (23). The connecting shell (71) is rotatably provided with a friction wheel (73) that cooperates with the friction ring (23). The movable shell (72) is rotatably provided with a pinch roller (74). The friction wheel (73) drives the pinch roller (74) to rotate through the transmission structure.

7. A steel pipe welding device according to claim 2, characterized in that: The retaining mechanism (9) includes a buckle (91) and a cover plate (93). The buckle (91) has multiple locking platforms (92) at its bottom. The top and bottom of the closed cover (2) are provided with locking grooves (28) that cooperate with the locking platforms (92). The cover plate (93) is installed inside the buckle (91). The inner side of the cover plate (93) is provided with a clamping ring (94).

Images