A steel pipe welding device

Abstract

The present application relates to the technical field of automatic welding, and discloses a steel pipe welding device, which comprises a handle and a closed cover, a rotating ring and a driving mechanism are arranged in the closed cover, the driving mechanism drives the rotating ring to rotate in the closed cover, a welding mechanism that moves with the rotating ring is arranged on the inner side of the rotating ring, the welding mechanism comprises a tungsten electrode column, an adjusting mechanism is arranged on the closed cover, the adjusting mechanism changes the angle of the tungsten electrode column and the distance from the welding seam, a fixed track ring is arranged in the closed cover, the fixed track ring cooperates with the welding mechanism to adjust the height of the welding point, and a retaining mechanism for clamping the steel pipe is arranged on the top of the closed cover through clamping, the steel pipe welding device effectively solves the problems of the existing equipment, such as lack of branch pipe welding field, poor adaptability, low welding point positioning accuracy and the like, realizes efficient and accurate automatic welding of regular and irregular welding seams, can adapt to different specifications of pipes, and greatly improves the practicability and welding quality of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic welding, in particular to a steel pipe welding device. BACKGROUND

[0002] As a core pipe material in the industrial field, steel pipes are widely used in building structures, petrochemical industry, oil and gas long-distance pipelines, municipal engineering and other scenes, and the connection quality directly determines the safety and service life of the pipeline system. Welding is a key process for connecting steel pipes. According to actual needs, steel pipe welding needs to cope with various weld forms, including regular ring seams formed by straight pipe butt joint, irregular welds formed by the intersection of main pipes and branch pipes (such as saddle-shaped welds of tee joints), etc. Among them, the weld of the branch pipe intersection is affected by the pipe diameter and the angle difference of the two pipes, and the weld is mostly in the form of an asymmetric curved surface, so the welding difficulty is much higher than that of the regular ring seam.

[0003] At present, there are automatic welding equipment for straight pipe butt joint ring seams in the industry. Such equipment drives the welding mechanism to move through a pre-set circular trajectory, which can realize automatic welding of regular ring seams, and to some extent, improves the efficiency and quality stability of straight pipe butt joint, but in the field of branch pipe welding, due to the irregularity of the weld, the existing automatic welding equipment cannot adapt to complex weld trajectories, and it is difficult to complete the automatic welding of irregular welds, resulting in that the branch pipe welding is still mainly operated by hand.

[0004] The existing steel pipe automatic welding equipment has significant applicability limitations: on the one hand, it can only meet the welding needs of regular ring seams such as straight pipe butt joint, and cannot be compatible with automatic operation of irregular welds such as branch pipes, and the applicable scene is single; on the other hand, manual welding not only has low efficiency, but also the welding quality is greatly affected by the technical level and experience of the operator, and defects such as uneven weld, incomplete fusion and porosity are prone to occur, and at the same time, in the narrow space area, especially when the main pipe increases the branch in the pipe house, manual welding has great limitations, and it is difficult to meet the development needs of modern industry for high efficiency, high quality and safety of steel pipe welding. SUMMARY

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

[0006] To solve the above technical problems, the technical scheme provided by the present application is as follows: a steel pipe welding device, comprising a handle and an enclosed cover, a swivel ring and a driving mechanism are arranged in the enclosed cover, the driving mechanism drives the swivel ring to rotate in the enclosed cover, and a welding mechanism that moves with the swivel ring is arranged on the inner side of the swivel ring.

[0007] The welding mechanism comprises a floating table, a lifting table, an adjusting slider, a connecting plate, a fixing frame and a tungsten pole, the lifting table is longitudinally slidably arranged inside the floating table, the adjusting slider is transversely slidably arranged inside the lifting table, the connecting plate is hingedly connected to the top of the adjusting slider, the bottom of the connecting plate is rotatably provided with an insulating cap for fixing the tail of the tungsten pole, the fixing frame is fixed to the inside of the rotating ring, and the fixing frame is rotatably provided with a sliding ring for slidingly matching the tungsten pole.

[0008] The adjusting mechanism is arranged on the closure cover, the adjusting mechanism changes the position of the lifting table and the adjusting slider, thereby changing the angle of the tungsten pole and the distance from the welding seam, the closure cover is provided with a fixed track ring, the fixed track ring cooperates with the floating table to adjust the height of the welding point, and the top of the closure cover is provided with a retaining mechanism for clamping the steel pipe.

[0009] As an improvement, the closure cover, the rotating ring, the fixed track ring and the retaining mechanism all adopt a three-part split structure, the closure cover comprises a fixed cover and two movable covers, the two movable covers are hingedly connected to the fixed cover, the two movable covers are connected through external buckles, the rotating ring comprises a ring plate one and two ring plate twos, the ring plate one and the two ring plate twos abut, and the welding mechanism is arranged on the ring plate one.

[0010] As an improvement, the inside of the ring plate one is provided with a fixed rod, the floating table is provided with a wing plate sliding on the fixed rod, the fixed rod is provided with a spring two connected to the wing plate, the bottom of the fixed track ring is matched with the welding seam, and the top of the floating table is rotatably provided with a roller matched with the bottom of the fixed track ring.

[0011] As an improvement, the adjusting mechanism comprises an adjusting knob, a guide sliding table and a U-shaped table, the guide sliding table is slidably arranged in a guide groove on the fixed cover, the adjusting knob is provided with a push rod penetrating through a through hole of the guide sliding table, a spring four is arranged between the adjusting knob and the guide sliding table, the end of the push rod is rotatably connected to the U-shaped table and provided with a hexagonal insertion table penetrating through a through hole on the U-shaped table, the rear end of the lifting table is insertedly matched with the U-shaped table, a threaded rod is rotatably arranged inside the lifting table, a threaded hole is arranged on the adjusting slider matched with the threaded rod, and the end of the threaded rod is provided with a hexagonal insertion groove insertedly matched with the hexagonal insertion table.

[0012] As an improvement, the floating table is symmetrically provided with a side plate on one side, the side plate is provided with a plurality of locking insertion grooves, the top of the lifting table is provided with a baffle and a guide plate, the top of the lifting table is slidably provided with a locking table, a spring three is arranged between the locking table and the baffle, a resisting rod is arranged on the locking table, the resisting rod penetrates through a through hole on the guide plate and cooperates with the U-shaped table, and the two ends of the locking table are insertedly matched with the locking insertion grooves.

[0013] As an improvement, the inside of the ring plate one is provided with a fixed table, a wire feeding mechanism is mounted on the fixed table, the wire feeding mechanism comprises a connecting shell and a movable shell, the connecting shell is rotatably connected to the movable shell, the movable shell is provided with a screw bolt matched with the connecting shell, the inside of the closure cover is provided with a friction ring, the connecting shell is rotatably provided with a friction wheel matched with the friction ring, a clamping roller is rotatably arranged inside the movable shell, and the friction wheel drives the clamping roller to rotate through a transmission structure.

[0014] As an improvement: the retaining mechanism includes a buckle ring and a cover plate, the bottom of the buckle ring is provided with a plurality of clamping tables, the top and bottom of the closed cover are provided with clamping grooves matched with the clamping tables, the cover plate is installed in the buckle ring, and the inner side of the cover plate is provided with a clamping ring.

[0015] Compared with the prior art, the steel pipe welding device has the beneficial effects that the steel pipe welding device effectively solves the problems of lack of branch pipe welding in existing equipment, poor adaptability, low welding point positioning precision and the like, realizes efficient and accurate automatic welding of regular and irregular welds, can adapt to different specifications of pipes, and greatly improves the practicality and welding quality of the device.

[0016] 1. The adjusting mechanism cooperates with the welding mechanism to work, the adjusting knob can release the locking of the lifting platform and adjust the height of the lifting platform, the rotation of the adjusting knob can drive the adjusting slider to move through the threaded rod, the angle of the tungsten electrode column and the spacing of the weld are accurately adjusted, the welding mechanism can be accurately moved along the irregular weld in cooperation with the guide ring, the height of the welding point is dynamically adapted, the welding point is prevented from deviating, and it is ensured that the regular and irregular welds can be stably formed;

[0017] 2. The closed cover, the rotating ring, the guide ring and the retaining mechanism all adopt a three-part structure, the movable cover is opened to conveniently assemble and disassemble the steel pipe to be welded, especially for the installed pipeline or long-size steel pipe, the problem of inconvenient assembly and disassembly of the steel pipe in special scenes caused by the traditional integral structure is solved, and meanwhile, different sizes of cover plates and clamping rings can be replaced to adapt to the welding requirements of steel pipes of various diameters, thereby widening the application range of the device;

[0018] 3. When the wire feeding mechanism rotates with the rotating ring, the friction ring inside the closed cover cooperates with the friction wheel to rotate, the welding wire is conveyed by the pinion and gear set driving the pinch roller, the wire feeding speed is synchronized with the rotating rhythm of the rotating ring, welding defects caused by too fast or too slow wire feeding are avoided, and the welding continuity and efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural diagram of the present application Figure 1 .

[0020] Figure 2 is a structural diagram of the present application Figure 2 .

[0021] Figure 3 is an exploded view of the present application.

[0022] Figure 4 is a structural diagram of the closed cover of the present application.

[0023] Figure 5 is a sectional view of the closed cover of the present application.

[0024] Figure 6is a sectional view of the positioning mechanism of the present application.

[0025] Figure 7 is a structural schematic diagram of the swivel and driving mechanism of the present application.

[0026] Figure 8 is a structural schematic diagram of the welding mechanism of the present application.

[0027] Figure 9 is a sectional view of the welding mechanism of the present application.

[0028] Figure 10 is an exploded view of the welding mechanism of the present application.

[0029] Figure 11 is an exploded view of the lifting platform of the present application.

[0030] Figure 12 is a structural schematic diagram of the adjusting mechanism of the present application.

[0031] Figure 13 is a structural schematic diagram of the wire feeding mechanism of the present application.

[0032] Figure 14 is an exploded view of the wire feeding mechanism of the present application.

[0033] Figure 15 is a partial structural schematic diagram of the wire feeding mechanism of the present application.

[0034] Figure 16 is a structural schematic diagram of the positioning ring of the present application.

[0035] Figure 17 is an exploded view of the retaining mechanism of the present application.

[0036] As shown in the figure: 1, handle; 2, closed cover; 3, rotating ring; 4, drive mechanism; 5, welding mechanism; 6, adjusting mechanism; 7, wire feeding mechanism; 8, fixed track ring; 9, retaining 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 pipe; 263, spring one; 264, positioning plug; 27, lock catch; 28, clamping groove; 31, ring plate one; 311, fixed rod; 312, spring two; 313, fixed table; 32, ring plate two; 321, positioning slot; 33, tooth ring; 34, air groove; 41, motor; 42, synchronous pulley; 43, inner tooth belt; 44, gear one; 45, gear two; 51, floating table; 511, wing plate; 512, side plate; 513, locking slot; 514, roller; 52, lifting table; 521, baffle; 522, spring three; 523, guide plate; 524, locking table; 525, stop rod; 53, adjusting slider; 54, threaded rod; 541, hexagonal slot; 55, connecting plate; 551, insulating cap; 56, fixed frame; 561, fixed plate; 562, slip ring; 57, tungsten electrode column; 61, adjusting knob; 62, push rod; 621, hexagonal insertion station; 63, guide sliding table; 64, U-shaped table; 65, spring four; 71, connecting shell; 711, blocking ring; 72, movable shell; 721, screw bolt; 73, friction wheel; 731, umbrella tooth one; 74, pinch roller; 741, gear three; 75, umbrella tooth two; 751, gear four; 76, gear five; 761, gear six; 81, mounting plate; 82, positioning table; 83, mold plate; 91, buckle ring; 92, clamping table; 93, cover plate; 94, clamping ring. DETAILED DESCRIPTION

[0037] The application will be further described in detail below with reference to the accompanying drawings.

[0038] The accompanying Figure 1 , the accompanying Figure 2 , the accompanying Figure 3 , and the accompanying Figure 8 The figure shows a steel pipe welding device, which includes a handle 1 and a closed cover 2. The closed cover 2 is provided with a rotating ring 3 and a drive mechanism 4. The drive mechanism 4 drives the rotating ring 3 to rotate in the closed cover 2. The inside of the rotating ring 3 is provided with a welding mechanism 5 which moves with the rotating ring 3. The welding mechanism 5 includes a tungsten electrode column 57. The closed cover 2 is provided with an adjusting mechanism 6 which changes the angle of the tungsten electrode column 57 and the distance from the weld. The closed cover 2 is provided with a fixed track ring 8 which cooperates with the welding mechanism 5 to adjust the height of the welding point. The top of the closed cover 2 is provided with a retaining mechanism 9 which clamps the steel pipe.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In actual work process, first, open the external lock buckle 27 of the closed cover 2, turn the two movable covers 22 hinged with the fixed cover 21 outward to open, at this time, the three-part structure of the closed cover 2, the rotating ring 3, the fixed track ring 8 and the retaining mechanism 9 are in the open state, which is convenient for placing the steel pipe to be welded stably in the clamping area of the retaining mechanism 9, compared with the integral structure, the difficulty of loading and unloading the steel pipe is greatly reduced, especially for longer or already installed steel pipes; then close the two movable covers 22 and lock them through the lock buckle 27, so that the closed cover 2 forms a complete protection space, and at the same time, the two ring plates two 32 and the ring plate one 31 are re-abutted to form a complete rotating ring 3, and the fixed track ring 8 and the retaining mechanism 9 are also closed and reset, and the closed retaining mechanism 9 stably clamps the steel pipe, and fixes the steel pipe or fixes the device through the already fixed steel pipe.

[0045] When welding, the driving mechanism 4 drives the rotating ring 3 to rotate in the closed cover 2, and the driving mechanism 4 drives the ring plate one 31 or the ring plate two 32 passing through the fixed cover 21 in turn, and drives the rotating ring 3 to rotate as a whole in the closed cover 2 by pushing, the three-part structure of the closed cover 2 not only ensures the protection effect, avoids the influence of welding spatter on the environment and the operator, but also can be conveniently opened after welding to take out the steel pipe, and at the same time, the three-part structure of the rotating ring 3, the fixed track ring 8 and the retaining mechanism 9 is also convenient for later part maintenance and replacement, which improves the overall use flexibility and maintenance convenience of the device.

[0046] Combined with the drawings Figure 1 and the drawings Figure 7 As shown, the driving mechanism 4 includes a motor 41, a synchronous pulley 42 and a gear two 45, two groups of synchronous pulleys 42 and gear two 45 are symmetrically arranged on the inner side of the end of the handle 1, the motor 41 is fixed on the outer side of the end of the handle 1, the output end of the motor 41 is connected with one of the synchronous pulleys 42, the two synchronous pulleys 42 are connected through the inner tooth belt 43, the bottom of the synchronous pulley 42 is provided with a gear one 44 engaged with the gear two 45, and the outer side of the rotating ring 3 is provided with a gear ring 33 engaged with the gear two 45.

[0047] The driving mechanism 4 is the core power component of the improved steel pipe welding device, mainly solves the problems of low power transmission efficiency and insufficient running stability in the traditional driving mode, and provides stable, uniform and accurately controlled rotating power for the rotating ring 3 through the cooperation of the motor 41, the synchronous pulley 42, the gear set and the gear ring 33, ensures that the welding mechanism 5 can move smoothly along the preset track, and then guarantees the welding quality, and since the ring plate one 31 is provided with a guide groove 211, in order to avoid the problem of transmission jamming or failure of the driving mechanism 4, two groups of synchronous pulleys 42 and gear sets are arranged, so that the rotating ring 3 can continuously and stably rotate.

[0048] In the actual work process, when the device completes the steel pipe clamping, the tungsten pole column 57 angle and spacing adjustment and the welding point height calibration, start the motor 41, the motor 41 output end will power transmission to the directly connected with one of the synchronous pulley 42, make the synchronous pulley 42 start to rotate, because two synchronous pulley 42 through the inner tooth belt 43 transmission connection, rotating synchronous pulley 42 will through the inner tooth belt 43 drive another symmetrical synchronous pulley 42 synchronous rotation, realize two groups of transmission structure power synchronous transmission, with the rotation of synchronous pulley 42, with the meshing gear one 44 also with it synchronous rotation, gear one 44 further will power transmission to the meshing gear two 45, rotating gear two 45 will through the gear ring 33 drive the rotating ring 3 in the closed cover 2 rotation.

[0049] Combining with the drawings Figure 6 and the drawings Figure 7 As shown in the drawings, one of the movable cover 22 outside is provided with positioning mechanism 26, positioning mechanism 26 includes positioning knob 261, the inside of positioning knob 261 is provided with threaded groove pipe 262, movable cover 22 outside is provided with threaded hole matched with threaded groove pipe 262, the inside of threaded groove pipe 262 is provided with spring one 263, threaded groove pipe 262 inside is provided with positioning plug 264, ring plate two 32 is provided with positioning slot 321, one end of positioning plug 264 is connected with spring one 263, the other end passes through the through hole on movable cover 22 and threaded groove pipe 262 and is inserted with positioning slot 321.

[0050] Positioning mechanism 26 as improved steel pipe welding device important auxiliary structure, mainly solve the rotating ring 3 in the closed cover 2 rotation reset, ring plate one 31 in fixed cover 21 reset inaccurate problem, through mechanical plug-in cooperation and elastic reset structure, realize the accurate positioning of rotating ring 3 and closed cover 2 in the reset process.

[0051] In the actual work process, when the welding is completed and the resetting process is carried out, the positioning mechanism 26 needs to be adjusted to fix the position of the ring plate two 32. During the welding work, the positioning plug rod 264 is located in the groove of the movable cover 22, and the end part is kept a certain distance from the rotating ring 3. During the resetting, the operator needs to rotate the positioning knob 261. Since the screw groove pipe 262 on the inside of the positioning knob 261 is screwed with the threaded hole on the movable cover 22, the screw groove pipe 262 will move to the inside of the movable cover 22 along with the rotation of the knob, until the end part of the screw groove pipe 262 is attached to the inside of the movable cover 22. At this time, under the push of the spring one 263, the positioning plug rod 264 moves with the positioning knob 261, and the positioning plug rod 264 abuts against the outside of the rotating ring 3, compressing the spring one 263. Then, the rotating ring 3 is slowly rotated through the driving mechanism 4, until the positioning plug groove 321 is aligned with the through hole on the movable cover 22 and the screw groove pipe 262. At this time, the spring one 263 releases the elastic potential energy, and pushes the positioning plug rod 264 to insert into the positioning plug groove 321, thereby stably connecting the ring plate two 32 with the movable cover 22. At this time, the various parts of the rotating ring 3 are aligned with the various parts of the closed cover 2, facilitating the opening of the closed cover 2. Before the next welding work, the positioning knob 261 needs to be rotated to release the restriction on the ring plate two 32.

[0052] In combination with the drawings shown in Figure 3 , the drawings shown in Figure 8 , the drawings shown in Figure 9 and the drawings shown in Figure 10 , the welding mechanism 5 includes a floating table 51, a lifting table 52, an adjusting sliding block 53, a connecting plate 55, a fixing frame 56 and a tungsten pole 57. The lifting table 52 is longitudinally slidably arranged inside the floating table 51, the adjusting sliding block 53 is transversely slidably arranged inside the lifting table 52, the connecting plate 55 is hingedly connected to the adjusting sliding block 53 at the top, and the bottom is rotatably provided with an insulating cap 551 for fixing the tail of the tungsten pole 57. The fixing frame 56 is fixed to the inside of the rotating ring 3, and the fixing frame 56 is rotatably provided with a sliding ring 562 which is slidably matched with the tungsten pole 57.

[0053] The welding mechanism 5 mainly solves the problems of the traditional welding assembly, such as the inflexible adjustment of the height, horizontal position and welding angle of the tungsten pole, the difficulty in adapting to the welding seam requirements of different steel pipes, and the easy shaking of the tungsten pole during work. Through the cooperation of multiple components, the tungsten pole is precisely positioned and stably operated.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Combined with appendix Figure 9 Appendix Figure 11 and attached Figure 12As shown, the floating platform 51 is symmetrically provided with a side plate 512 on one side, and a plurality of locking slots 513 are arranged on the side plate 512. The top of the lifting platform 52 is provided with a baffle 521 and a guide plate 523. The locking platform 524 is slidably arranged on the top of the lifting platform 52. The spring three 522 is arranged between the locking platform 524 and the baffle 521. The locking platform 524 is provided with a stop rod 525. The stop rod 525 passes through the through hole of the guide plate 523 and cooperates with the U-shaped platform 64. The two ends of the locking platform 524 are inserted and matched with the locking slots 513.

[0062] The adjusting mechanism 6 is the core adjusting component of the device, mainly adjusts the welding mechanism 5, cooperates with the welding mechanism 5 to solve the problem that the operation steps are complicated when adjusting the height and horizontal position of the tungsten electrode column 57, and the lifting platform is easy to be displaced due to vibration or external force after adjustment, resulting in that the welding parameters deviate from the preset value. Through the cooperation of mechanical transmission, elastic reset and pin locking, the accurate adjustment and stable locking of the height and horizontal position of the tungsten electrode column are realized, and the welding precision is ensured.

[0063] When working, if the height of the lifting platform 52 needs to be adjusted, the adjusting knob 61 is first pushed, the U-shaped platform 64 is moved to the lifting platform 52 through the push rod 62, the rear end of the lifting platform 52 is inserted into the U-shaped platform 64, the spring four 65 is compressed, and the end of the U-shaped platform 64 pushes the stop rod 525 to move along the through hole on the guide plate 523. The stop rod 525 drives the locking platform 524 to slide to the direction of the baffle 521, the spring three 522 is compressed, the two ends of the locking platform 524 are separated from the locking slots 513 of the side plate 512, the locking limitation of the lifting platform 52 is released, and then the up and down movement of the adjusting knob 61 can realize the height position adjustment of the lifting platform 52 in the inside of the floating platform 51. When the adjusting knob 61 is reset, the spring three 522 pushes the locking platform 524 to move, the two sides of the locking platform 524 are reinserted into the locking slots 513, and the locking work of the lifting platform 52 is completed.

[0064] If the height of the lifting platform 52 needs to be adjusted, the adjusting knob 61 is pushed, the rear end of the lifting platform 52 is inserted into the U-shaped platform 64, the hexagonal insertion platform 621 at the end of the push rod 62 is inserted into the hexagonal insertion slot 541 of the threaded rod 54, the adjusting knob 61 is rotated, the threaded rod 54 is synchronously rotated through the push rod 62, the threaded hole on the adjusting block 53 cooperates with the threaded rod 54, the rotation of the threaded rod 54 drives the adjusting block 53 to slide along the inside of the lifting platform 52, the position adjustment of the adjusting block 53 in the inside of the lifting platform 52 is realized, the rotation of the adjusting knob 61 is stopped, the threaded cooperation of the threaded rod 54 and the adjusting block 53 forms self-locking, and the height locking structure of the lifting platform remains stable, which double guarantees that the position of the tungsten electrode column does not deviate, and meets the requirement of the welding operation on the parameter precision.

[0065] The drawings are attached Figure 3 , the drawings are attached Figure 7 , the drawings are attached Figure 8 and the drawings are attachedFigure 16 As shown, the inner side of the ring plate one 31 is provided with a fixed rod 311, the floating platform 51 is provided with a wing plate 511 sliding on the fixed rod 311, the fixed rod 311 is provided with a spring two 312 connected with the wing plate 511, the fixed rail ring 8 includes a mounting plate 81 mounted in the mounting groove 25 on the inner side of the closed cover 2, the top of the mounting plate 81 is provided with a positioning platform 82, the mounting groove 25 is provided with a groove slidingly matched with the positioning platform 82, the bottom of the mounting plate 81 is provided with a profile plate 83, the bottom of the profile plate 83 is matched with the welding seam, and the top of the floating platform 51 is rotatably provided with a roller 514 matched with the bottom of the profile plate 83.

[0066] The fixed rail ring 8 is the core guarantee component of the device for keeping the welding track and the height of the welding point, mainly solving the problem that the traditional welding equipment cannot automatically weld irregular welding seams, the height of the welding point is difficult to dynamically adapt to the shape of the welding seam, and the welding quality is uneven, through the sliding cooperation with the welding mechanism, the elastic self-adaptation and the track limiting design, the precise following of the welding mechanism along the welding seam and the dynamic stability of the height of the welding point are realized, and the welding seam forming quality is guaranteed.

[0067] In work, first, the mounting plate 81 of the fixed rail ring 8 is embedded into the mounting groove 25 on the inner side of the closed cover 2, the positioning platform 82 on the top of the mounting plate 81 is slidingly matched with the groove in the mounting groove 25, the position of the mounting plate 81 in the closed cover 2 is fixed, the deviation of the fixed rail ring 8 itself affecting the track guiding is avoided, because the bottom of the profile plate 83 is matched with the welding seam, and the roller 514 on the top of the floating platform 51 is matched with the bottom of the profile plate 83, when the driving mechanism drives the rotating ring 3 to rotate, the fixed rod 311 on the inner side of the ring plate one 31 moves synchronously with the rotating ring, the floating platform 51 slides on the fixed rod 311 through the wing plate 511, and the spring two 312 exerts an upward thrust on the wing plate 511, so that the roller 514 always rolls on the bottom of the profile plate 83, the profile plate 83 limits the moving track of the floating platform 51 through the roller 514, the floating platform 51 drives the welding mechanism to move accurately along the welding seam, and the welding mechanism deviating from the welding seam is avoided, the cooperation structure of the mounting plate 81 and the mounting groove 25 can also be separated and assembled synchronously with the three-piece structure of the closed cover 2 when the device is disassembled and assembled, without affecting the overall operation convenience of the device, finally, through the track limiting and elastic self-adaptation of the fixed rail ring 8, the precise following of the welding mechanism along the welding seam and the dynamic stability of the height of the welding point are realized, and the welding seam is uniformly formed and the welding quality is reliable during the whole welding process.

[0068] The single-piece profile plate 83 can adopt a double-layer structure, the upper layer is a mounting table, and the lower layer is a fixed rail table, when facing the matching size of the main branch pipe which is not common and requires high welding precision, the length, width and depth of the welding seam can be measured first, a small volume of the fixed rail table is quickly printed by 3D, and is installed on the mounting table, so that the use requirement is met; in addition, when two straight pipes are welded, the fixed rail ring 8 is not needed, and the welding track is circular at this time.

[0069] Fig. 1 is a schematic view of the steel pipe welding device according to the present application; Figure 3 Fig. 2 is a schematic view of the steel pipe welding device according to the present application; Figure 7 Fig. 3 is a schematic view of the steel pipe welding device according to the present application; Figure 13 Fig. 4 is a schematic view of the steel pipe welding device according to the present application; Figure 14 Fig. 5 is a schematic view of the steel pipe welding device according to the present application; Figure 15 As shown in Figs. 1-5, the inner side of the ring plate 31 is provided with a fixing table 313, and the fixing table 313 is provided with a wire feeding mechanism 7. The wire feeding mechanism 7 comprises a connecting shell 71 and a movable shell 72. The connecting shell 71 is provided with a stop ring 711 at one end, and the stop ring 711 is rotatably connected with the movable shell 72. The movable shell 72 is provided with a screw bolt 721 matched with the stop ring 711. 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 matched with the friction ring 23. The connecting shell 71 is rotatably provided with a bevel gear 75 and a gear 76 inside. The bottom of the friction wheel 73 is provided with a bevel gear 731 engaged with the bevel gear 75. The bevel gear 75 is coaxially connected with a gear 751 engaged with the gear 76. The movable shell 72 is provided with a gear 761 coaxially connected with the gear 76 inside. The movable shell 72 is rotatably provided with pinch rollers 74. The pinch rollers 74 are provided with gear 741 at the end. The gear 741 of the two pinch rollers 74 is engaged, and one of the gear 741 is engaged with the gear 761.

[0070] The wire feeding mechanism 7 is a key auxiliary component of the steel pipe welding device. It mainly solves the problems of the traditional welding wire feeding process, such as the asynchronization of the wire feeding speed and the movement rhythm of the rotating ring driven welding mechanism, the uneven wire feeding force leading to unstable wire conveying, and the complicated disassembly and maintenance of the wire feeding component. Through the linkage design with the rotating ring and the closed cover, the precise adaptive conveying of the welding wire and the welding operation is realized, and the continuous and stable welding process is ensured.

[0071] In operation, the connecting shell 71 is installed on the fixed table 313 inside the ring plate 31, the friction wheel 73 on the connecting shell 71 is attached to the friction ring 23 inside the closed cover 2, then the welding wire is inserted into the through hole of the movable shell 72, the angle is adjusted according to the extension of the welding wire, the movable shell 72 is rotated during the adjustment, and after the adjustment is completed, the movable shell 72 of the wire feeding mechanism 7 is abutted against the stop ring 711 by the screwed bolt 721; when the driving mechanism drives the rotating ring 3 to rotate, the fixed table 313 drives the wire feeding mechanism 7 to rotate as a whole around the steel pipe, at this time, the friction wheel 73 rotates due to the relative sliding with the fixed friction ring 23, and then rotates by itself; the bevel gear one 731 at the bottom of the friction wheel 73 rotates with the friction wheel 73, drives the bevel gear two 75 meshed with the bevel gear one 731 to rotate, the gear four 751 coaxially connected with the bevel gear two 75 rotates synchronously, and the gear five 76 meshed with the gear four 751 is driven to rotate; the gear five 76 is coaxial with the gear six 761 in the movable shell 72, the gear six 761 rotates with the gear five 76, and then drives the gear three 741 at the end of one of the pinch rollers 74 meshed with the gear six 761 to rotate; since the gear three 741 of the two pinch rollers 74 are meshed with each other, the other pinch roller 74 also rotates reversely, and the two pinch rollers 74 jointly and continuously feed the welding wire to the welding seam at a uniform speed, and the wire feeding speed is adjusted synchronously with the change of the rotating speed of the rotating ring 3, so that the wire feeding amount is accurately matched with the welding rhythm.

[0072] When welding irregular welds, an insulating sleeve is installed at the rear position of the tungsten electrode column 57, and the welding wire is inserted into the insulating sleeve, at this time, the screwed bolt 721 is loosened, the connecting shell 71 and the movable shell 72 are kept in rotational connection, and when the floating table 51 is adaptively adjusted according to the height of the bottom of the fixed ring 8, the tungsten electrode column 57 moves up and down, the movable shell 72 is rotated through the cooperation of the insulating sleeve and the welding wire, and the angle adjustment of the welding wire is followed; when welding thin-walled pipes, the wire feeding mechanism 7 is not needed, and it can be removed from the fixed table 313.

[0073] In combination with the drawings Figure 4 and the drawings Figure 17 As shown in the drawings, the retaining mechanism 9 includes a clasp 91 and a cover plate 93, the clasp 91 is provided with a plurality of clamping tables 92 at the bottom, the closed cover 2 is provided with clamping grooves 28 matched with the clamping tables 92 at the top and the bottom, the cover plate 93 is installed in the clasp 91, and the inner side of the cover plate 93 is provided with a clamping ring 94.

[0074] The retaining mechanism 9 mainly solves the problems that the steel pipe is axially or radially deviated due to the rotation of the rotating ring and welding vibration during the welding process, and the traditional retaining structure has poor adaptability to different pipe diameters and is inconvenient to install and remove, realizes the stable retaining and positioning of the steel pipe through the combination of clamping fixation and quick release structure, and takes into account the operation convenience and pipe diameter adaptability.

[0075] In operation, first, according to the pipe diameter of the steel pipe to be welded, the appropriate clamping ring 94 is selected, the cover plate 93 is installed in the clamping ring 91, so that the clamping ring 94 is in the center area of the clamping ring 91, then the plurality of clamping blocks 92 at the bottom of the clamping ring 91 are aligned with the clamping grooves 28 at the top of the closed cover 2, the clamping ring 91 is fixed on the closed cover 2 through the insertion fit of the clamping blocks 92 and the clamping grooves 28, the connection and fixation of the retaining mechanism 9 and the closed cover 2 are completed, then the split clamping ring 94 is combined into a circular clamping steel pipe with the closing of the closed cover 2, forming a clamping force on the steel pipe and limiting the movement of the steel pipe.

[0076] For steel pipes of different diameters, the retaining mechanism 9 can be adapted to steel pipes of various specifications by replacing cover plates 93 and clamping rings 94 of different sizes, improving the versatility of the device; when welding two straight pipes, the retaining mechanism 9 is installed on the clamping grooves 28 at the bottom of the closed cover 2, and two retaining mechanisms 9 clamp the two straight pipes at the same time, playing the role of axial alignment and fixation.

[0077] In the closed state of the closed cover 2, the split cover plate 93 is combined into a closed plate, cooperating with the closed cover 2 to form a single outlet cavity with only the bottom outlet. After the argon gas delivery pipe inside the handle 1 is delivered to the inner cavity of the closed cover 2 through the through hole of the fixed cover 21, the argon gas flows through the welding area through the air slot 34 on the rotating ring 3, forming a welding gas protection. A through hole can also be opened on the cover plate 93 to deliver argon gas to the inner cavity of the closed cover 2.

[0078] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creating a similar structure and embodiment of the technical solution, it should belong to the protection scope of the present application.

Claims

1. A steel pipe welding device, comprising a handle (1) and an enclosed cover (2), a rotating ring (3) and a driving mechanism (4) are arranged in the enclosed cover (2), the driving mechanism (4) drives the rotating ring (3) to rotate in the enclosed cover (2), a welding mechanism (5) is arranged on the inner side of the rotating ring (3) and moves with the rotating ring (3), characterized in that: the welding mechanism (5) comprises a floating platform (51), a lifting platform (52), an adjusting sliding block (53), a connecting plate (55), a fixing frame (56) and a tungsten electrode column (57), the lifting platform (52) is longitudinally slidably arranged on the inner side of the floating platform (51), the adjusting sliding block (53) is transversely slidably arranged on the inner side of the lifting platform (52), the connecting plate (55) is hingedly connected to the adjusting sliding block (53) at the top and rotatably arranged with an insulating cap (551) for fixing the tail of the tungsten electrode column (57) at the bottom, the fixing frame (56) is fixed on the inner side of the rotating ring (3), and a sliding ring (562) that is in sliding cooperation with the tungsten electrode column (57) is rotatably arranged on the fixing frame (56); an adjusting mechanism (6) is arranged on the enclosed cover (2), the adjusting mechanism (6) changes the position of the lifting platform (52) and the adjusting sliding block (53) to change the angle of the tungsten electrode column (57) and the distance from the welding seam, a fixed track ring (8) is arranged in the enclosed cover (2), the fixed track ring (8) cooperates with the floating platform (51) to adjust the height of the welding point, and a retaining mechanism (9) for clamping a steel pipe is clamped on the top of the enclosed cover (2); the rotating ring (3) comprises a ring plate one (31) and two ring plate twos (32), the ring plate one (31) and the two ring plate twos (32) abut against each other, the welding mechanism (5) is arranged on the ring plate one (31), a fixed rod (311) is arranged on the inner side of the ring plate one (31), a wing plate (511) that slides on the fixed rod (311) is arranged on the floating platform (51), a spring two (312) that is connected to the wing plate (511) is arranged on the fixed rod (311), the bottom of the fixed track ring (8) is matched with the welding seam, and a roller (514) that cooperates with the bottom of the fixed track ring (8) is rotatably arranged on the top of the floating platform (51); the adjusting mechanism (6) comprises an adjusting knob (61), a guide sliding table (63) and a U-shaped table (64), the guide sliding table (63) is slidably arranged in a guide groove (211) on the fixed cover (21), a push rod (62) that passes through a through hole of the guide sliding table (63) is arranged on the adjusting knob (61), a spring four (65) is arranged between the adjusting knob (61) and the guide sliding table (63), the end of the push rod (62) is rotatably connected with the U-shaped table (64) and is provided with a hexagonal insertion table (621) that passes through a through hole of the U-shaped table (64), the rear end of the lifting platform (52) is insertedly connected with the U-shaped table (64), a threaded rod (54) is rotatably arranged on the inner side of the lifting platform (52), a threaded hole that cooperates with the threaded rod (54) is arranged on the adjusting sliding block (53), and a hexagonal insertion groove (541) that is insertedly connected with the hexagonal insertion table (621) is arranged on the end of the threaded rod (54). ​ The floating platform (51) is symmetrically provided with a side plate (512) on one side, a plurality of locking slots (513) are arranged on the side plate (512), a baffle (521) and a guide plate (523) are arranged on the top of the lifting platform (52), a locking platform (524) is slidably arranged on the top of the lifting platform (52), a spring (522) is arranged between the locking platform (524) and the baffle (521), a stop rod (525) is arranged on the locking platform (524), the stop rod (525) passes through a through hole in the guide plate (523) and cooperates with the U-shaped platform (64), and the two ends of the locking platform (524) are inserted and matched with the locking slots (513).

2. A steel pipe welding apparatus according to claim 1, wherein: The closed cover (2), the rotating ring (3), the fixed ring (8) and the retaining 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), and the two movable covers (22) are connected by external buckles (27).

3. A pipe welding apparatus according to claim 2, wherein: The inner side of the ring plate one (31) is provided with a fixed table (313), the fixed table (313) is provided with a wire feeding mechanism (7), the wire feeding mechanism (7) includes a connecting shell (71) and a movable shell (72), the connecting shell (71) is rotatably connected with the movable shell (72), the movable shell (72) is provided with a screw bolt (721) matched 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) matched with the friction ring (23), the inside of the movable shell (72) is rotatably provided with a pinch roller (74), and the friction wheel (73) drives the pinch roller (74) to rotate through a transmission structure.

4. A pipe welding apparatus according to claim 2, wherein: The retaining mechanism (9) includes a clasp (91) and a cover plate (93), the clasp (91) is provided with a plurality of clamping tables (92) at the bottom, the top and bottom of the closed cover (2) are provided with clamping grooves (28) matched with the clamping tables (92), the cover plate (93) is installed in the clasp (91), and the inner side of the cover plate (93) is provided with a clamping ring (94).

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