Positioning welding equipment for pipeline butt joint

Abstract

The invention relates to the technical field of pipeline welding equipment, and discloses positioning welding equipment for pipeline butt joint, which comprises a base, a shell is arranged in the middle of the base, pipelines are arranged at two ends of the shell in a sliding manner, and strip seams are formed in the two pipelines; a welding mechanism is arranged in the middle of the shell, two positioning mechanisms are symmetrically arranged in the shell, each positioning mechanism comprises a sliding groove formed in the shell, a first sliding seat is arranged in each sliding groove in a sliding mode, a positioning block is arranged on each first sliding seat in a sliding mode, and each positioning block is matched with the corresponding strip seam; and the pipelines are spirally pushed to the middle end of the shell until the positioning blocks are embedded into the strip seams, so that the pipelines stop rotating, and the two strip seams in the two pipelines are aligned. According to the positioning and welding equipment for pipeline butt joint, a welding assembly line of a large number of pipelines is achieved, and when two pipelines are welded, two seams can be aligned automatically, so that manual positioning is avoided, and the welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding equipment, and particularly to a positioning welding equipment for pipeline butt joint. Background Art

[0002] When welding two metal pipelines together, welding equipment such as arc welding, gas welding or plasma welding is required. For example, acetylene welding equipment uses a welding torch burning acetylene to circle around the splicing seam of two steel pipes for welding.

[0003] In addition to welding the two pipelines completely in a circle, some welding operations also require welding only a local area of the two pipelines. For example, for some special-shaped pipelines, several slits penetrating the inner and outer walls of the pipelines need to be reserved at the splicing seam, and the slits are not welded, while the non-slit areas are welded.

[0004] Welding can be carried out manually or automatically. When using automated welding equipment, for the welding of two pipelines with slits, it is necessary to expend additional manpower to align the slits of the two pipelines and keep the relative positions of the two pipelines fixed during the welding process, both of which will result in a reduction in welding efficiency.

[0005] Therefore, in order to solve the above technical problems existing in the prior art, a positioning welding equipment for pipeline butt joint is proposed. Summary of the Invention

[0006] The present invention provides a positioning welding equipment for pipeline butt joint, which has the beneficial effect of realizing a welding assembly line for a large number of pipelines. When welding two pipelines, the two slits can be automatically aligned, thus eliminating manual positioning and improving the welding efficiency. It solves the problems mentioned in the above background art that when using automated welding equipment, for the welding of two pipelines with slits, it is necessary to expend additional manpower to align the slits of the two pipelines and keep the relative positions of the two pipelines fixed during the welding process, both of which will result in a reduction in welding efficiency.

[0007] The present invention provides the following technical solution: A positioning welding equipment for pipeline butt joint, including a base, a housing is arranged in the middle of the base, pipelines are slidably arranged at both ends of the housing, and slits are opened on both of the pipelines;

[0008] A welding mechanism is arranged in the middle of the housing, and two positioning mechanisms are symmetrically arranged in the housing. The positioning mechanism includes a chute opened in the housing, a first sliding seat is slidably arranged in the chute, a positioning block is slidably arranged on the first sliding seat, and the positioning block fits with the slit;

[0009] By spirally pushing the pipe towards the middle end of the housing until the positioning block fits into the slot and the pipe stops rotating, so that the two slots on the two pipes are aligned, and then welding the two pipes through the welding mechanism.

[0010] As an alternative embodiment of the positioning and welding device for pipe docking according to the present invention, wherein: the first sliding seat is elastically connected to the inner wall of the housing through a first spring, a limiting rod is provided on the positioning block, the limiting rod is slidably connected to the first sliding seat, and the limiting rod is elastically connected to the first sliding seat through a second spring;

[0011] A first limiting groove and a second limiting groove that are communicated with each other are formed in the housing. The first limiting groove is located at a position far from the middle end of the housing, the second limiting groove is located at a position close to the middle end of the housing, and the limiting rod is slidably connected to the first limiting groove and the second limiting groove.

[0012] As an alternative embodiment of the positioning and welding device for pipe docking according to the present invention, wherein: the welding mechanism includes a welding torch provided on the housing, the welding torch is aligned with the joint of the two pipes, and a welding wire is slidably provided on the housing;

[0013] A first motor is provided on the housing, a wire winding cylinder is provided on the output shaft of the first motor, the welding wire is wound around the wire winding cylinder, and by driving the wire winding cylinder to rotate through the first motor, the welding wire is wound around the joint of the two pipes for one circle.

[0014] As an alternative embodiment of the positioning and welding device for pipe docking according to the present invention, wherein: feeding tracks are provided on both sides of the base, the two feeding tracks are used for conveying the two pipes, a discharging track is provided in the middle of the base, the discharging track is located below the housing, and the discharging track is used for conveying the two pipes welded together;

[0015] The lower end of the housing is rotatably provided with a bottom cover through a hinge shaft.

[0016] As an alternative embodiment of the positioning and welding device for pipe docking according to the present invention, wherein: a first connecting seat is provided on the base, and a second connecting seat is provided on the bottom cover;

[0017] It further includes a cylinder, and rotating shafts are provided at both ends of the cylinder, and the two rotating shafts are respectively rotatably connected to the first connecting seat and the second connecting seat.

[0018] As an alternative solution of the positioning welding device for pipeline docking described in the present invention, the following is provided: Feeding mechanisms are arranged on both sides of the housing. The two feeding mechanisms are used to convey two pipelines from both ends of the housing to the middle end of the housing. The feeding mechanism includes a screw conveyor device arranged on the base. The screw conveyor device is used to drive the displacement of a push rod, and the push rod is used to push the pipeline.

[0019] The feeding mechanism further includes a clamping assembly and a rotating assembly. The clamping assembly is used to clamp the pipeline, and the rotating assembly is used to drive the pipeline to rotate.

[0020] As an alternative solution of the positioning welding device for pipeline docking described in the present invention, the following is provided: The screw conveyor device includes a mounting seat arranged on the base. A slider is slidably arranged on the mounting seat. The push rod is connected to the slider. A second motor is arranged on the mounting seat. A screw rod is arranged on the output shaft of the second motor. A nut is threadedly connected to the screw rod. The slider is connected to the nut.

[0021] As an alternative solution of the positioning welding device for pipeline docking described in the present invention, the following is provided: The clamping assembly includes a second sliding seat slidably arranged on the base. An electric three-jaw chuck is rotatably arranged on the second sliding seat. A first connecting rod is arranged on the second sliding seat. A second connecting rod is arranged on the slider. The second connecting rod is slidably connected to the first connecting rod.

[0022] As an alternative solution of the positioning welding device for pipeline docking described in the present invention, the following is provided: The rotating assembly includes a third motor arranged on the second sliding seat. A first gear is arranged on the output shaft of the third motor. A ring is arranged on the electric three-jaw chuck. A second gear is arranged on the ring. The second gear meshes with the first gear.

[0023] As an alternative solution of the positioning welding device for pipeline docking described in the present invention, the following is provided: The ring is rotatably connected to the electric three-jaw chuck. An arc-shaped groove is formed in the ring. An arc-shaped block is arranged on the second gear. The arc-shaped block is slidably connected to the arc-shaped groove. The arc-shaped block is elastically connected to the inner wall of the arc-shaped groove through a third spring.

[0024] The present invention has the following beneficial effects:

[0025] 1. For the positioning and welding equipment for pipeline docking, when welding pipelines with a special configuration of a slit, a positioning block that perfectly fits the slit can be used to position the pipeline. By spirally pushing the pipeline against the positioning block, during the pushing process, the pipeline rotates relative to the positioning block until the positioning block aligns with the slit and fits into it, thus fixing the position of the slit. When two pipelines are docked, the two slits can also be docked. This eliminates the need for manual docking of two pipelines with slits, improving the welding efficiency.

[0026] 2. The positioning and welding equipment for pipeline docking, the rotation assembly used to control the rotation of the pipeline for positioning and welding has drive modes for both clockwise and counterclockwise driving directions. When positioning, the pipeline is driven to rotate clockwise to align the slit and the positioning block. In the clockwise driving mode, a certain buffer is achieved between the rotation assembly and the pipeline through a spring. After the positioning block and the slit fit together, negative feedback adjustment can be carried out in a timely manner through a sensor to stop the output of the rotation assembly. When welding, the pipeline is driven to rotate counterclockwise. In the counterclockwise driving mode, the rotation assembly and the pipeline are rigidly connected without buffering, and can drive the pipeline to rotate firmly for one circle for welding.

[0027] 3. The positioning and welding equipment for pipeline docking realizes the flow operation of the pipeline production line. A large number of pipelines slide down from two feeding tracks and are then stopped. Then, two feeding mechanisms automatically convey a pair of pipelines to the middle of the housing, and the positioning and docking of the slits are automatically completed during the conveying process. After welding, the lower opening of the housing is automatically opened, and the two welded pipelines slide down onto the discharging track. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the whole of the present invention.

[0029] Figure 2 It is a schematic cross-sectional structural diagram of the whole of the present invention.

[0030] Figure 3 For the present invention Figure 2 It is a schematic diagram of a partially enlarged structure at A in the present invention.

[0031] Figure 4 For the present invention Figure 2 It is a schematic diagram of a partially enlarged structure at B in the present invention.

[0032] Figure 5 For the present invention Figure 2 It is a schematic diagram of a partially enlarged structure at C in the present invention.

[0033] Figure 6 For the present invention Figure 2 It is a schematic diagram of a partially enlarged structure at D in the present invention.

[0034] Figure 7 Schematic cross-sectional structure diagram of the housing in the present invention.

[0035] Figure 8 In the present invention Figure 7 Schematic enlarged partial structure diagram at position E in the present invention.

[0036] Figure 9 Schematic cross-sectional structure diagram of the electric three-jaw chuck in the present invention.

[0037] Figure 10 Schematic exploded structure diagram of the rotating assembly in the present invention.

[0038] Figure 11 Schematic exploded structure diagram of the positioning mechanism in the present invention.

[0039] Figure 12 Schematic exploded structure diagram of the welding mechanism in the present invention.

[0040] In the figure: 100, base; 110, housing; 120, loading track; 130, unloading track; 140, hinge shaft; 150, bottom cover; 160, first connecting seat; 170, second connecting seat; 180, cylinder; 190, rotating shaft; 200, loading mechanism; 210, screw conveying device; 211, mounting seat; 212, slider; 213, second motor; 214, screw; 215, nut; 220, push rod; 230, clamping assembly; 231, second sliding seat; 232, electric three-jaw chuck; 233, first connecting rod; 234, second connecting rod; 240, rotating assembly; 241, third motor; 242, first gear; 243, ring; 244, second gear; 245, arc groove; 246, arc block; 247, second spring; 300, pipeline; 310, slit; 400, welding mechanism; 410, welding torch; 420, welding wire; 430, first motor; 440, wire winding cylinder; 500, positioning mechanism; 510, chute; 520, first sliding seat; 530, positioning block; 540, first spring; 550, limiting rod; 560, second spring; 570, first limiting groove; 580, second limiting groove. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Example 1, please refer to Figures 1-12, A positioning and welding device for pipeline docking, including a base 100. A housing 110 is provided in the middle of the base 100. Pipes 300 are slidably provided at both ends of the housing 110. Slits 310 are opened on both of the two pipes 300.

[0043] A welding mechanism 400 is provided in the middle of the housing 110. Two positioning mechanisms 500 are symmetrically provided in the housing 110. The positioning mechanism 500 includes a chute 510 opened in the housing 110. A first sliding seat 520 is slidably provided in the chute 510. A positioning block 530 is slidably provided on the first sliding seat 520. The positioning block 530 fits with the slit 310.

[0044] By spirally pushing the pipe 300 towards the middle end of the housing 110 until the positioning block 530 is inserted into the slit 310 to stop the rotation of the pipe 300, so that the two slits 310 on the two pipes 300 are aligned, and then the two pipes 300 are welded by the welding mechanism 400.

[0045] The first sliding seat 520 is elastically connected to the inner wall of the housing 110 through a first spring 540. A limiting rod 550 is provided on the positioning block 530. The limiting rod 550 is slidably connected to the first sliding seat 520. The limiting rod 550 is elastically connected to the first sliding seat 520 through a second spring 560.

[0046] A first limiting groove 570 and a second limiting groove 580 which are connected and communicated are opened in the housing 110. The first limiting groove 570 is located at a position far from the middle end of the housing 110. The second limiting groove 580 is located at a position close to the middle end of the housing 110. The limiting rod 550 is slidably connected in the first limiting groove 570 and the second limiting groove 580.

[0047] In this embodiment: The pipe 300 is a metal component with a special shape. A slit 310 is opened at one end of it. When welding the two pipes 300 together, the two slits 310 need to be aligned, and the area of the slit 310 should be avoided during welding.

[0048] A circular hole penetrating left and right is opened on the housing 110. The circular hole is adapted to the pipe 300. There is a hollowed-out groove at the middle end of the housing 110. The groove is used to accommodate the welding torch 410 to align the two pipes 300.

[0049] The two pipes 300 can be manually or mechanically pushed synchronously from the left and right ends of the housing 110 towards the middle. During the pushing process, the left and right positioning mechanisms 500 respectively position the two pipes 300 so that the two slits 310 on the two pipes 300 are aligned. After the two pipes 300 are positioned and joined together, the two pipes 300 are synchronously rotated manually or mechanically. During the rotation process, the two pipes 300 are welded by the welding torch 410.

[0050] Taking a set of pipes 300 and a positioning mechanism 500 located on the right side as an example, as Figure 6 and Figure 11 shown, the positioning block 530 is arranged on the upper right side. If the slot 310 also happens to be on the upper right side, then the pipe 300 is first moved to the left without rotation. At this time, the slot 310 and the positioning block 530 are exactly fitted together. Since the limiting rod 550 is in the first limiting groove 570 at this time, the limiting rod 550 and the positioning block 530 cannot rise. At this time, the pipe 300 will move the positioning block 530 and the first sliding seat 520 to the left together. If the pipe 300 is driven to rotate around its left-right axis at this time, since the positioning block 530 and the slot 310 are stuck, the pipe 300 cannot rotate.

[0051] Without driving the pipe 300 to rotate, the pipe 300, the positioning block 530, and the first sliding seat 520 are pushed to the left together. The limiting rod 550 enters the second limiting groove 580. When the first sliding seat 520 reaches the leftmost side of the sliding groove 510, at this time, the limiting rod 550 is not limited and can rise, while the first sliding seat 520 is restricted from moving further to the left. At this time, if the pipe 300 continues to move to the left, it will push the positioning block 530 and the limiting rod 550 upward. Until the lower end of the positioning block 530 passes through part of the slot 310 and contacts the circumferential surface of the pipe 300. At this time, the entire first sliding seat 520 will be pulled back to the rightmost side of the second limiting groove 580 by the resilience of the first spring 540. And the pipe 300 moves to the left while keeping the slot 310 vertically upward until it contacts the pipe 300 that has moved to the right from the left in the middle of the housing 110. The two pipes 300 complete positioning and docking.

[0052] Finally, after the two pipes 300 welded together are released downward from the middle of the housing 110, the first sliding seat 520 will be continuously pulled to the right by the resilience of the first spring 540 to the rightmost side of the sliding groove 510 for resetting. At the same time, the limiting rod 550 also moves downward along the slope at the transition between the second limiting groove 580 and the first limiting groove 570 and then resets.

[0053] If the slot 310 on the pipe 300 is not vertically upward at the beginning, when the pipe 300 contacts the right inclined surface of the positioning block 530, it will also drive the positioning block 530 and the first sliding seat 520 to move to the left. At this time, control the pipe 300 to rotate while moving to the left, that is, move left in a spiral. Then when the pipe 300 rotates to a certain angle, the positioning block 530 will exactly align with the slot 310, and the positioning block 530 will also be fitted into the slot 310.

[0054] Embodiment 2. This embodiment is an improved description based on Embodiment 1. Specifically, please refer to Figures 1-12, the welding mechanism 400 includes a welding torch 410 disposed on the housing 110. The welding torch 410 is aligned with the joint of the two pipes 300, and a welding wire 420 is slidably disposed on the housing 110.

[0055] A first motor 430 is disposed on the housing 110. A wire winding cylinder 440 is disposed on the output shaft of the first motor 430. The welding wire 420 is wound around the wire winding cylinder 440. By driving the wire winding cylinder 440 to rotate through the first motor 430, the welding wire 420 is wound around the joint of the two pipes 300 in a circle.

[0056] In this embodiment: during welding, the welding torch 410 can be a welding device such as gas welding, arc welding, plasma welding, etc. As a conventional technical means, its specific structure and working principle will not be elaborated.

[0057] When the two pipes 300 are joined, the two slits 310 are butted and vertically upward. At this time, the welding wire 420 is located at the rear side edge of the two slits 310. The two pipes 300 are driven to rotate synchronously counterclockwise. The high temperature of the flame generated by the welding torch 410 melts the welding wire 420 and the joint of the two pipes 300 to form a weld seam. As the two pipes 300 rotate counterclockwise, the first motor 430 also drives the wire winding cylinder 440 to rotate counterclockwise, causing the welding wire 420 to extend forward. Thus, the welding wire 420 gradually winds around more than half of the joint of the two pipes 300 and stops welding at the front side edge of the two slits 310.

[0058] After welding is completed, the welding wire 420 can be automatically melted by the gravity of the two welded pipes 300 when they fall, or a shearing device can be added to cut the welding wire 420. Thus, the head of the welding wire 420 remains at the initial position.

[0059] Embodiment 3, this embodiment is an improved description based on Embodiment 1. Specifically, please refer to Figures 1-12 , feeding tracks 120 are provided on both sides of the base 100. The two feeding tracks 120 are used to convey the two pipes 300. A discharging track 130 is provided in the middle of the base 100. The discharging track 130 is located below the housing 110. The discharging track 130 is used to convey the two pipes 300 welded together.

[0060] The lower end of the housing 110 is rotatably provided with a bottom cover 150 through a hinge shaft 140.

[0061] A first connecting seat 160 is provided on the base 100, and a second connecting seat 170 is provided on the bottom cover 150.

[0062] It further includes a cylinder 180. Both ends of the cylinder 180 are provided with rotating shafts 190. The two rotating shafts 190 are respectively rotatably connected to the first connecting seat 160 and the second connecting seat 170.

[0063] In this embodiment: To implement the above positioning and welding device on the automatic welding production line of the pipeline 300. Specifically, the two feeding tracks 120 incline downward to the front side. The two feeding tracks 120 can be connected to the upstream of the production line, and a large number of pipelines 300 slide from the uphill to the downhill of the feeding tracks 120.

[0064] When the pipeline 300 reaches the foremost side of the feeding track 120, it is stopped by the inner wall of the feeding track 120. At this time, the feeding mechanism 200 pushes the pipeline 300 towards the housing 110, so that the pipeline 300 is conveyed from both sides of the circular hole of the housing 110 to the middle.

[0065] During the positioning and welding of the two pipelines 300, the air cylinder 180 controls the bottom cover 150 to remain closed. After welding is completed, by shortening the air cylinder 180, through the transmission of the two rotating shafts 190 and the first connecting seat 160 and the second connecting seat 170, the bottom cover 150 will rotate counterclockwise based on the hinge shaft 140, so that the lower opening of the housing 110 is opened, and the two welded pipelines 300 will fall along the opening of the housing 110 onto the discharging track 130 and then fall along the discharging track 130.

[0066] Embodiment 4. This embodiment is an improved description based on Embodiment 1. Specifically, please refer to Figures 1-10 , feeding mechanisms 200 are arranged on both sides of the housing 110. The two feeding mechanisms 200 are used to convey two pipelines 300 from both ends of the housing 110 to the middle end of the housing 110. The feeding mechanism 200 includes a screw conveying device 210 arranged on the base 100. The screw conveying device 210 is used to drive the displacement of the push rod 220, and the push rod 220 pushes the pipeline 300.

[0067] The feeding mechanism 200 further includes a clamping assembly 230 and a rotating assembly 240. The clamping assembly 230 is used to clamp the pipeline 300, and the rotating assembly 240 is used to drive the pipeline 300 to rotate.

[0068] The screw conveying device 210 includes a mounting seat 211 arranged on the base 100. A slider 212 is slidably arranged on the mounting seat 211. The push rod 220 is connected to the slider 212. A second motor 213 is arranged on the mounting seat 211. A screw rod 214 is arranged on the output shaft of the second motor 213. A nut 215 is threadedly connected to the screw rod 214, and the slider 212 is connected to the nut 215.

[0069] The clamping assembly 230 includes a second sliding seat 231 slidably arranged on the base 100. An electric three-jaw chuck 232 is rotatably arranged on the second sliding seat 231. A first connecting rod 233 is arranged on the second sliding seat 231. A second connecting rod 234 is arranged on the slider 212. The second connecting rod 234 is slidably connected to the first connecting rod 233.

[0070] In this embodiment: Taking a set of feeding mechanisms 200 and pipelines 300 on the right side as an example. When a row of pipelines 300 is stopped in front of the feeding track 120, the second motor 213 runs to drive the screw rod 214 to rotate, so that the nut 215 and the slider 212 move leftward under the limit of the mounting seat 211.

[0071] The slider 212 drives the push rod 220 to move leftward. After the push rod 220 contacts the right end of a pipeline 300 located at the forefront, the pipeline 300 is pushed leftward. At this time, the second connecting rod 234 moves leftward along with the push rod 220. The second connecting rod 234 slides leftward relative to the first connecting rod 233 and does not push the first connecting rod 233 and the second sliding seat 231.

[0072] When the right side of the pipeline 300 reaches the middle of the electric three-jaw chuck 232 as shown in Figure 5 When it reaches the middle of the electric three-jaw chuck 232, the electric three-jaw chuck 232 is controlled to operate to clamp the pipeline 300. The middle of the electric three-jaw chuck 232 is hollowed out. The electric three-jaw chuck 232 can also be a pneumatic, hydraulic or other automatic three-jaw chuck. As a conventional technical means, its specific structure and working principle will not be elaborated.

[0073] After the electric three-jaw chuck 232 clamps the pipeline 300, the second connecting rod 234 also moves to the leftmost side of the inner groove of the first connecting rod 233. If the second connecting rod 234 continues to move leftward, it will push the second sliding seat 231 and the electric three-jaw chuck 232 to move leftward together.

[0074] The electric three-jaw chuck 232 and the pipeline 300 move leftward synchronously until the pipeline 300 reaches the middle position of the housing 110 and is welded. Then the second motor 213 runs in the reverse direction, so that the slider 212 and the push rod 220 move rightward, and the electric three-jaw chuck 232 is controlled to release the pipeline 300. At this time, the pipeline 300 is left in the middle of the housing 110. The slider 212 first drives the push rod 220 to move rightward. After the second connecting rod 234 moves to the rightmost side of the inner groove of the first connecting rod 233, the second sliding seat 231 and the electric three-jaw chuck 232 are pulled back to the reset position.

[0075] So on and so forth. After welding a pair of pipelines 300, the device resets and then welds the next pair of pipelines 300.

[0076] Embodiment 5. This embodiment is an improved description based on Embodiment 4. Specifically, please refer to Figures 2-10 , the rotating assembly 240 includes a third motor 241 arranged on the second sliding seat 231. A first gear 242 is arranged on the output shaft of the third motor 241. A ring 243 is arranged on the electric three-jaw chuck 232. A second gear 244 is arranged on the ring 243. The second gear 244 meshes with the first gear 242.

[0077] The circular ring 243 is rotatably connected to the electric three-jaw chuck 232. An arc-shaped groove 245 is formed in the circular ring 243. An arc-shaped block 246 is provided on the second gear 244. The arc-shaped block 246 is slidably connected in the arc-shaped groove 245. The arc-shaped block 246 is elastically connected to the inner wall of the arc-shaped groove 245 through a third spring 247.

[0078] In this embodiment: Since the strip slot 310 may be at various positions on the circumference when the pipe 300 contacts the positioning block 530, it is necessary to drive the pipe 300 to rotate different angles according to different situations.

[0079] Specifically, after the electric three-jaw chuck 232 clamps the pipe 300, first, the third motor 241 does not operate, so that the positions of the first gear 242 and the second gear 244 are fixed. At this time, the position of the pipe 300 is also fixed. Until the pipe 300 moves leftward to contact the positioning block 530, the third motor 241 controls the first gear 242 to rotate counterclockwise, so that the second gear 244 and the arc-shaped block 246 rotate clockwise.

[0080] The arc-shaped block 246 is initially on the counterclockwise side within the arc-shaped groove 245. At this time, when the arc-shaped block 246 rotates clockwise along the arc-shaped groove 245, it will compress the third spring 247 and at the same time drive the circular ring 243 and the electric three-jaw chuck 232 to rotate clockwise.

[0081] If the strip slot 310 is initially in the vertically upward position, the positioning block 530 will be engaged into the strip slot 310 at the beginning. At this time, the circular ring 243 and the electric three-jaw chuck 232 cannot rotate clockwise, and the third spring 247 will be further compressed, playing a buffering role. A force sensor can be installed in the arc-shaped groove 245, or a negative feedback adjustment device can be installed at the third motor 241 to judge whether the electric three-jaw chuck 232 can rotate. If the electric three-jaw chuck 232 cannot rotate, the third motor 241 is controlled to stop running in time.

[0082] If the strip slot 310 is not initially in the vertically upward position, after the pipe 300 rotates a certain angle, the positioning block 530 will be engaged into the strip slot 310. At this time, similarly, the electric three-jaw chuck 232 cannot continue to rotate clockwise, the third spring 247 is further compressed, and then the third motor 241 is controlled to stop running.

[0083] When welding two pipes 300, the third motor 241 is controlled to drive the first gear 242 to rotate clockwise, driving the second gear 244 to rotate counterclockwise. Since the arc-shaped block 246 is in contact with the inner wall of the arc-shaped groove 245 in the counterclockwise direction, the third spring 247 will not be compressed at this time, and the arc-shaped block 246 will immediately drive the ring 243 and the electric three-jaw chuck 232 to rotate counterclockwise, thereby driving the pipe 300 to rotate counterclockwise.

[0084] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0085] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A positioning welding device for pipe butt joint, comprising a base (100), characterized in that: A shell (110) is disposed in the middle of the base (100), pipes (300) are slidably disposed at both ends of the shell (110), and slits (310) are provided on the two pipes (300); A welding mechanism (400) is provided in the middle of the shell (110), and two positioning mechanisms (500) are symmetrically provided in the shell (110), and the positioning mechanism (500) comprises a slide groove (510) opened in the shell (110), a first slide seat (520) is slidably provided in the slide groove (510), a positioning block (530) is slidably provided on the first slide seat (520), and the positioning block (530) is matched with the slit (310); The pipe (300) is spirally pushed toward the middle end of the shell (110) until the positioning block (530) is engaged in the slit (310) so that the pipe (300) stops rotating, thereby aligning the two slits (310) on the two pipes (300), and then the two pipes (300) are welded by the welding mechanism (400).

2. A positioning welding device for pipe butt joint according to claim 1, characterized in that: The first slide seat (520) is elastically connected to the inner wall of the housing (110) via a first spring (540); a limiting rod (550) is provided on the positioning block (530); the limiting rod (550) is slidably connected to the first slide seat (520); and the limiting rod (550) is elastically connected to the first slide seat (520) via a second spring (560); The shell (110) is provided with a first limiting groove (570) and a second limiting groove (580) which are connected to each other. The first limiting groove (570) is located away from the middle end of the shell (110), and the second limiting groove (580) is located close to the middle end of the shell (110). The limiting rod (550) is slidably connected to the first limiting groove (570) and the second limiting groove (580).

3. A positioning welding device for pipe butt joint according to claim 1, characterized in that: The welding mechanism (400) comprises a welding torch (410) arranged on the housing (110), the welding torch (410) is aimed at the joint of the two pipes (300), and a welding wire (420) is slidably arranged on the housing (110); A first motor (430) is disposed on the housing (110), a winding drum (440) is disposed on the output shaft of the first motor (430), the welding wire (420) is wound around the winding drum (440), and the winding drum (440) is driven to rotate by the first motor (430), so that the welding wire (420) is wound around the joint of the two pipes (300).

4. The positioning welding equipment for pipe butt joint according to claim 1 is characterized in that: Both sides of the base (100) are provided with loading rails (120), the two loading rails (120) are used to transport the two pipes (300), and the middle part of the base (100) is provided with a unloading rail (130), the unloading rail (130) is located at the lower side of the shell (110), and the unloading rail (130) is used to transport the two pipes (300) welded together; A bottom cover (150) is rotatably provided at the lower end of the housing (110) via a hinge shaft (140).

5. A positioning welding device for pipe butt joint according to claim 4, characterized in that: The base (100) is provided with a first connection seat (160), and the bottom cover (150) is provided with a second connection seat (170); It also comprises a cylinder (180), both ends of which are provided with rotating shafts (190), and the two rotating shafts (190) are respectively rotatably connected to the first connecting seat (160) and the second connecting seat (170).

6. The positioning welding equipment for pipe butt joint according to claim 1, characterized in that: A feeding mechanism (200) is provided on both sides of the shell (110), and the two feeding mechanisms (200) are used to transport two pipes (300) from the two ends of the shell (110) to the middle end of the shell (110), and the feeding mechanism (200) comprises a screw conveying device (210) provided on the base (100), and the screw conveying device (210) is used to drive the push rod (220) to move, and push the pipe (300) through the push rod (220); The feeding mechanism (200) further comprises a clamping assembly (230) and a rotating assembly (240), wherein the clamping assembly (230) is used to clamp the pipe (300), and the rotating assembly (240) is used to drive the pipe (300) to rotate.

7. A positioning welding device for pipe butt joint according to claim 6, characterized in that: The screw conveying device (210) comprises a mounting seat (211) arranged on the base (100), a slider (212) is slidably arranged on the mounting seat (211), the push rod (220) is connected to the slider (212), a second motor (213) is arranged on the mounting seat (211), a screw (214) is arranged on the output shaft of the second motor (213), a nut (215) is threadedly connected to the screw (214), and the slider (212) is connected to the nut (215).

8. The positioning welding equipment for pipe butt joint according to claim 7 is characterized in that: The clamping assembly (230) includes a second slide seat (231) slidably arranged on the base (100), an electric three-jaw chuck (232) is rotatably arranged on the second slide seat (231), a first connecting rod (233) is arranged on the second slide seat (231), a second connecting rod (234) is arranged on the slider (212), and the second connecting rod (234) is slidably connected to the first connecting rod (233).

9. A positioning welding device for pipe butt joint according to claim 8, characterized in that: The rotating assembly (240) comprises a third motor (241) arranged on the second slide seat (231); a first gear (242) is arranged on the output shaft of the third motor (241); a circular ring (243) is arranged on the electric three-jaw chuck (232); a second gear (244) is arranged on the circular ring (243); and the second gear (244) is meshed with the first gear (242).

10. The positioning welding equipment for pipe butt joint according to claim 9, characterized in that: The circular ring (243) is rotatably connected to the electric three-jaw chuck (232); an arc groove (245) is provided on the circular ring (243); an arc block (246) is provided on the second gear (244); the arc block (246) is slidably connected in the arc groove (245); the arc block (246) is elastically connected to the inner wall of the arc groove (245) via a third spring (247).

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