A positioning and welding device for pipe butt joint

Abstract

The application relates to the technical field of pipeline welding equipment, and discloses a positioning welding equipment for pipeline butt joint, which comprises a base, a shell arranged in the middle of the base, pipelines slidingly arranged at the two ends of the shell, and slits arranged on the two pipelines; a welding mechanism is arranged in the middle of the shell, two positioning mechanisms are symmetrically arranged in the shell, the positioning mechanism comprises a sliding groove arranged in the shell, a first sliding seat slidingly arranged in the sliding groove, a positioning block slidingly arranged on the first sliding seat, and the positioning block is matched with the slit; the pipeline is spirally pushed to the middle end of the shell until the positioning block is embedded into the slit to stop the rotation of the pipeline, so that the two slits on the two pipelines are aligned. The positioning welding equipment for pipeline butt joint realizes a welding assembly line for a large number of pipelines, can automatically align the two slits when welding the two pipelines, and thus avoids manual positioning and improves the welding efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding equipment technology, specifically to a positioning welding device for pipeline docking. Background Technology

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

[0003] In addition to welding two pipes completely around their perimeter, some welding operations require welding only specific areas of the two pipes. For example, for some irregularly shaped pipes, several slots need to be left at the joint, penetrating the inner and outer walls of the pipe. Welding is not performed at these slots, but at the non-slot areas.

[0004] Welding can be done manually or automatically. When using automated welding equipment, welding two pipes with seams requires additional manpower to align the seams of the two pipes and keep their relative positions fixed during the welding process, which will reduce welding efficiency.

[0005] Therefore, in order to solve the above-mentioned technical problems in the existing technology, a positioning welding device for pipe docking is proposed. Summary of the Invention

[0006] This invention provides a positioning welding device for pipe butt welding, which enables a large-scale pipe welding production line. When welding two pipes, it can automatically align the two seams, thereby eliminating the need for manual positioning and improving welding efficiency. This solves the problem mentioned in the background art that when using automated welding equipment, welding two pipes with seams requires additional manpower to align the seams and keep the relative positions of the two pipes fixed during the welding process, both of which lead to reduced welding efficiency.

[0007] The present invention provides the following technical solution: a positioning welding device for pipe docking, including a base, a shell is provided in the middle of the base, and pipes are slidably provided at both ends of the shell, and a slit is opened on each of the two pipes;

[0008] A welding mechanism is provided in the middle of the housing. Two positioning mechanisms are symmetrically arranged inside the housing. Each positioning mechanism includes a groove formed inside the housing. A first slide block is slidably arranged in the groove. A positioning block is slidably arranged on the first slide block. The positioning block fits into the seam.

[0009] By spirally pushing the pipe toward the middle of the housing until the positioning block engages with the slot, causing the pipe to stop rotating, the two slots on the two pipes are aligned, and then the two pipes are welded together by the welding mechanism.

[0010] As an optional solution of the positioning welding equipment for pipe docking described in this invention, wherein: the first slide is elastically connected to the inner wall of the housing through a first spring, a limit rod is provided on the positioning block, the limit rod is slidably connected to the first slide, and the limit rod is elastically connected to the first slide through a second spring;

[0011] The housing has a first limiting groove and a second limiting groove that are connected to each other. The first limiting groove is located at the middle of the housing away from the middle of the housing, and the second limiting groove is located at the middle of the housing near the middle of the housing. The limiting rod is slidably connected in the first limiting groove and the second limiting groove.

[0012] As an optional solution of the positioning welding equipment for pipe docking described in this invention, the welding mechanism includes a welding torch disposed on the housing, the welding torch being aligned with the joint of the two pipes, and a welding wire being slidably disposed on the housing;

[0013] A first motor is provided on the housing, and a winding drum is provided on the output shaft of the first motor. The welding wire is wound on the winding drum. The first motor drives the winding drum to rotate, so that the welding wire circles around the joint of the two pipes.

[0014] As an optional solution of the positioning welding equipment for pipe docking described in this invention, the base is provided with loading rails on both sides, the two loading rails are used to transport the two pipes, and the base is provided with unloading rail in the middle, the unloading rail is located on the lower side of the shell, and the unloading rail is used to transport the two pipes welded together.

[0015] The lower end of the housing is fitted with a bottom cover via a hinge.

[0016] As an optional solution of the positioning welding equipment for pipe docking described in this invention, the base is provided with a first connecting seat and the bottom cover is provided with a second connecting seat.

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

[0018] As an optional solution of the positioning welding equipment for pipe docking described in this invention, wherein: a feeding mechanism is provided on both sides of the housing, and the two feeding mechanisms are used to transport two pipes from both ends of the housing to the middle end of the housing, and the feeding mechanism includes a screw conveying device provided on the base, the screw conveying device being used to drive the push rod to move, and push the pipe through the push rod;

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

[0020] As an optional embodiment of the positioning welding equipment for pipe docking described in this invention, the screw conveying device includes a mounting base disposed on the base, a slider slidably disposed on the mounting base, a push rod connected to the slider, a second motor disposed on the mounting base, a screw disposed on the output shaft of the second motor, a screw threadedly connected to the screw, and the slider connected to the screw nut.

[0021] As an optional embodiment of the positioning welding equipment for pipe docking described in this invention, the clamping assembly includes a second slide block slidably disposed on the base, an electric three-jaw chuck rotatably disposed on the second slide block, a first connecting rod disposed on the second slide block, a second connecting rod disposed on the slider, and the second connecting rod slidably connected to the first connecting rod.

[0022] As an optional embodiment of the positioning welding equipment for pipe docking described in this invention, the rotating assembly includes a third motor disposed on the second slide, a first gear disposed on the output shaft of the third motor, a ring disposed on the electric three-jaw chuck, a second gear disposed on the ring, and the second gear meshing with the first gear.

[0023] As an optional embodiment of the positioning welding equipment for pipe docking described in this invention, the circular ring is rotatably connected to the electric three-jaw chuck, the circular ring is provided with an arc-shaped groove, the second gear is provided with an arc-shaped block, the arc-shaped block is slidably connected in the arc-shaped groove, and 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. This pipe-to-pipe positioning welding equipment allows for the positioning of pipes with special seam configurations using a positioning block that perfectly matches the seam. By spirally pushing the pipe towards the positioning block, the pipe rotates relative to the block until it aligns with the seam, thus fixing the seam's position. This ensures that when two pipes are joined, the two seams also align, eliminating the need for manual joining of two pipes with seams and improving welding efficiency.

[0026] 2. This pipe-connecting positioning and welding equipment features a rotating component that controls pipe rotation for positioning and welding, offering both clockwise and counter-clockwise driving modes. During positioning, the pipe rotates clockwise to align the seam and positioning block. In clockwise mode, a spring provides cushioning between the rotating component and the pipe, allowing for timely negative feedback adjustment and stopping of the rotating component's output after the positioning block and seam are engaged. During welding, the pipe rotates counter-clockwise. In counter-clockwise mode, the rotating component and pipe are rigidly connected without cushioning, allowing for a more secure rotation of the pipe for welding.

[0027] 3. This pipe-connecting positioning welding equipment enables streamlined operation of the pipe production line. A large number of pipes slide down from two feeding tracks and are stopped. Then, two feeding mechanisms automatically transport a pair of pipes towards the center of the casing, automatically completing the positioning and connection of the seams during transport. After welding, the lower opening of the casing is automatically opened, allowing the two welded pipes to slide onto the unloading track. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0030] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0031] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0032] Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at point C.

[0033] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at point D.

[0034] Figure 7 This is a cross-sectional view of the shell structure in this invention.

[0035] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point E in the middle.

[0036] Figure 9 This is a cross-sectional view of the electric three-jaw chuck in this invention.

[0037] Figure 10 This is an exploded view of the rotating component in this invention.

[0038] Figure 11 This is an exploded structural diagram of the positioning mechanism in this invention.

[0039] Figure 12 This is an exploded structural diagram of the welding mechanism in this invention.

[0040] In the diagram: 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, lead screw conveyor; 211, mounting base; 212, slider; 213, second motor; 214, lead screw; 215, lead screw nut; 220, push rod; 230, clamping assembly; 231, second slide; 232, electric three-jaw chuck; 233, first connecting rod; 234, second connecting rod; 24 0. Rotating assembly; 241. Third motor; 242. First gear; 243. Ring; 244. Second gear; 245. Arc groove; 246. Arc block; 247. Third spring; 300. Pipe; 310. Slit; 400. Welding mechanism; 410. Welding torch; 420. Welding wire; 430. First motor; 440. Winding spool; 500. Positioning mechanism; 510. Slide groove; 520. First slide block; 530. Positioning block; 540. First spring; 550. Limiting rod; 560. Second spring; 570. First limiting groove; 580. Second limiting groove. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1, please refer to Figures 1-12A positioning welding device for pipe docking includes a base 100, a housing 110 is provided in the middle of the base 100, and pipes 300 are slidably provided at both ends of the housing 110, with a slot 310 opened on each 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 arranged inside the housing 110. The positioning mechanism 500 includes a slide groove 510 opened in the housing 110. A first slide block 520 is slidably arranged in the slide groove 510. A positioning block 530 is slidably arranged on the first slide block 520. The positioning block 530 fits with the slot 310.

[0044] By spirally pushing the pipe 300 toward the middle of the housing 110 until the positioning block 530 is fitted into the slot 310, the pipe 300 stops rotating, thereby aligning the two slots 310 on the two pipes 300, and then welding the two pipes 300 together by the welding mechanism 400.

[0045] The first slide block 520 is elastically connected to the inner wall of the housing 110 via the first spring 540. The positioning block 530 is provided with a limit rod 550, which is slidably connected to the first slide block 520. The limit rod 550 is elastically connected to the first slide block 520 via the second spring 560.

[0046] The housing 110 has a first limiting groove 570 and a second limiting groove 580 that are connected to each other. The first limiting groove 570 is located at the middle part away from the housing 110, and the second limiting groove 580 is located at the middle part near 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, and a slot 310 is opened on one end. When welding two pipes 300 together, the two slots 310 need to be aligned, and the area of ​​the slot 310 should be avoided during welding.

[0048] The housing 110 has a through-hole that fits into the pipe 300. There is a hollowed-out groove in the middle of the housing 110, which is used to accommodate the welding torch 410 to align with the two pipes 300.

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

[0050] Taking a set of pipes 300 and positioning mechanism 500 located on the right as an example, such as Figure 6 and Figure 11 As shown, the positioning block 530 is positioned at the top. If the slot 310 is also located at the top, the pipe 300 will move to the left without rotating. At this time, the slot 310 and the positioning block 530 will fit together. Since the limiting rod 550 is in the first limiting groove 570, the limiting rod 550 and the positioning block 530 cannot rise. The pipe 300 will then move to the left along with the positioning block 530 and the first slide block 520. If the pipe 300 is then driven to rotate around its left and right axes, the pipe 300 will not be able to rotate because the positioning block 530 and the slot 310 are jammed.

[0051] Without rotating the pipe 300, push the pipe 300, positioning block 530, and first slide block 520 to the left. The limiting rod 550 enters the second limiting groove 580 until the first slide block 520 reaches the leftmost side of the groove 510. At this point, the limiting rod 550 is no longer limited and can rise, but the first slide block 520 is restricted from moving further to the left. The pipe 300 continues to move to the left, pushing the positioning block 530 and the limiting rod 550 upwards. This continues until the lower end of the positioning block 530 passes through the slot 310 and contacts the circumferential surface of the pipe 300. At this point, the first slide block 520 is pulled back to the right by the rebound force of the first spring 540 to the rightmost side of the second limiting groove 580. The pipe 300, with the slot 310 still vertically upward, moves left to the middle of the housing 110 and contacts the pipe 300 that moved right from the left. The two pipes 300 are then positioned and connected.

[0052] Finally, after the two welded pipes 300 are released downwards from the middle of the housing 110, the first slide block 520 will be pulled to the right by the rebound force of the first spring 540 to reset to the rightmost side of the slide groove 510. At the same time, the limit rod 550 will also move down along the slope at the transition between the second limit groove 580 and the first limit groove 570 and reset.

[0053] If the slot 310 on the pipe 300 is not initially vertical, when the pipe 300 contacts the right inclined surface of the positioning block 530, it will also cause the positioning block 530 and the first slide block 520 to move to the left. At this time, the pipe 300 is controlled to rotate while moving to the left, that is, to move to the left in a spiral. Then, when the pipe 300 rotates to a certain angle, the positioning block 530 will be aligned with the slot 310, and the positioning block 530 will also fit into the slot 310.

[0054] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-12The welding mechanism 400 includes a welding torch 410 disposed on the housing 110, the welding torch 410 being aligned with the joint of the two pipes 300, and a welding wire 420 being slidably disposed on the housing 110.

[0055] A first motor 430 is provided on the housing 110. A winding drum 440 is provided on the output shaft of the first motor 430. Welding wire 420 is wound on the winding drum 440. The first motor 430 drives the winding drum 440 to rotate, so that the welding wire 420 circles around the joint of the two pipes 300.

[0056] In this embodiment: During welding, the welding torch 410 can be welding equipment such as gas welding, electric arc welding, or plasma welding. As a conventional technical means, its specific structure and working principle will not be described in detail.

[0057] When the two pipes 300 are joined, the two seams 310 are aligned vertically upwards. At this time, the welding wire 420 is located at the rear edge of the two seams 310, driving the two pipes 300 to rotate counterclockwise synchronously. 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. As the two pipes 300 rotate counterclockwise, the first motor 430 also drives the winding drum 440 to rotate counterclockwise, causing the welding wire 420 to extend forward. Thus, the welding wire 420 gradually wraps around most of the joint of the two pipes 300, stopping welding at the front edge of the two seams 310.

[0058] After welding is completed, the welding wire 420 can be automatically melted by the gravity of the two welded pipes 300 falling, or a shearing device can be added to cut the welding wire 420. This ensures that the head of the welding wire 420 remains in its initial position.

[0059] Example 3 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-12 The base 100 is provided with loading rails 120 on both sides. The two loading rails 120 are used to transport two pipes 300. The base 100 is provided with unloading rails 130 in the middle. The unloading rails 130 are located on the lower side of the housing 110. The unloading rails 130 are used to transport two pipes 300 that are welded together.

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

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

[0062] It also includes a cylinder 180, with a rotating shaft 190 at both ends of the cylinder 180. The two rotating shafts 190 are rotatably connected to the first connecting seat 160 and the second connecting seat 170, respectively.

[0063] In this embodiment: to implement the above-mentioned positioning and welding device on the automated welding production line of the pipe 300, specifically, the two feeding tracks 120 are inclined forward and downward. The two feeding tracks 120 can be connected to the upstream of the production line, and a large number of pipes 300 slide down the slope from the feeding tracks 120.

[0064] After reaching the foremost side of the feeding track 120, the pipe 300 is stopped by the inner wall of the feeding track 120. At this time, the feeding mechanism 200 pushes the pipe 300 towards the housing 110, causing the pipe 300 to be conveyed from both sides of the circular hole in the housing 110 towards the center.

[0065] During the positioning and welding process of the two pipes 300, the cylinder 180 controls the bottom cover 150 to remain closed. After welding is completed, the cylinder 180 shortens, and 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 pipes 300 will fall along the opening of the housing 110 onto the unloading track 130, and then fall along the unloading track 130.

[0066] Example 4 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-10 The housing 110 is provided with feeding mechanisms 200 on both sides. The two feeding mechanisms 200 are used to transport the two pipes 300 from both ends of the housing 110 to the middle end of the housing 110. The feeding mechanism 200 includes a screw conveyor 210 provided on the base 100. The screw conveyor 210 is used to drive the push rod 220 to move, and push the pipes 300 through the push rod 220.

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

[0068] The lead screw conveyor 210 includes a mounting base 211 disposed on a base 100, a slider 212 slidably disposed on the mounting base 211, a push rod 220 connected to the slider 212, a second motor 213 disposed on the mounting base 211, a lead screw 214 disposed on the output shaft of the second motor 213, a lead screw 215 threadedly connected to the lead screw 214, and the slider 212 connected to the lead screw 215.

[0069] The clamping assembly 230 includes a second slide block 231 slidably disposed on the base 100, an electric three-jaw chuck 232 rotatably disposed on the second slide block 231, a first connecting rod 233 disposed on the second slide block 231, a second connecting rod 234 disposed on the slider 212, and the second connecting rod 234 slidably connected to the first connecting rod 233.

[0070] In this embodiment, we take the right-side feeding mechanism 200 and pipe 300 as an example. When a row of pipes 300 is stopped in front of the feeding track 120, the second motor 213 drives the lead screw 214 to rotate, causing the lead screw nut 215 and the slider 212 to move to the left under the limit of the mounting base 211.

[0071] The slider 212 drives the push rod 220 to move to the left. After the push rod 220 contacts the right end of the foremost pipe 300, it pushes the pipe 300 to the left. At this time, the second connecting rod 234 moves to the left along with the push rod 220. The second connecting rod 234 slides to the left relative to the first connecting rod 233 and will not push the first connecting rod 233 and the second slide block 231.

[0072] When the right side of pipe 300 is as follows Figure 5 When the pipe 300 reaches the center of the electric three-jaw chuck 232, the operation of the electric three-jaw chuck 232 is controlled to clamp it. The electric three-jaw chuck 232 has a hollow center. 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 described in detail.

[0073] After the electric three-jaw chuck 232 clamps the pipe 300, the second connecting rod 234 also moves to the left to the leftmost side of the inner groove of the first connecting rod 233. The continued leftward movement of the second connecting rod 234 will push the second slide block 231 and the electric three-jaw chuck 232 to move to the left together.

[0074] The electric three-jaw chuck 232 and the pipe 300 move synchronously to the left until the pipe 300 reaches the middle position of the housing 110 and is welded. Then, the second motor 213 runs in the opposite direction, causing the slider 212 and the push rod 220 to move to the right, and controlling the electric three-jaw chuck 232 to release the pipe 300. At this time, the pipe 300 is left in the middle of the housing 110, and the slider 212 first drives the push rod 220 to move to the right until the second connecting rod 234 moves to the rightmost side of the inner groove of the first connecting rod 233. Then, the second slide block 231 and the electric three-jaw chuck 232 are pulled to the right to return to their original positions.

[0075] This process is repeated until a pair of pipes 300 is welded, at which point the device is reset, and the next pair of pipes 300 is then welded.

[0076] Example 5 is an improvement upon Example 4. For details, please refer to [link / reference]. Figures 2-10 The rotating assembly 240 includes a third motor 241 mounted on the second slide block 231. A first gear 242 is mounted on the output shaft of the third motor 241. An electric three-jaw chuck 232 is mounted on a ring 243. A second gear 244 is mounted on the ring 243. The second gear 244 meshes with the first gear 242.

[0077] The ring 243 is rotatably connected to the electric three-jaw chuck 232. The ring 243 has an arc-shaped groove 245. The second gear 244 is provided with an arc-shaped block 246. 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 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 at different angles depending on the situation.

[0079] Specifically, after the electric three-jaw chuck 232 clamps the pipe 300, the third motor 241 initially stops operating, fixing the positions of the first gear 242 and the second gear 244, thus fixing the position of the pipe 300. Only when the pipe 300 moves to the left and contacts the positioning block 530 does the third motor 241 control the first gear 242 to rotate counter-clockwise, causing the second gear 244 and the arc-shaped block 246 to rotate clockwise.

[0080] The arc-shaped block 246 is initially positioned on one side of the arc-shaped groove 245 in the counterclockwise direction. At this time, the arc-shaped block 246 rotates clockwise along the arc-shaped groove 245, which will compress the third spring 247 and simultaneously drive the ring 243 and the electric three-jaw chuck 232 to rotate clockwise.

[0081] If the slot 310 is initially in a vertically upward position, the positioning block 530 will immediately engage with the slot 310. At this point, the ring 243 and the electric three-jaw chuck 232 cannot rotate clockwise, and the third spring 247 will be further compressed, acting as a buffer. A force sensor can be installed in the arc-shaped groove 245, or a negative feedback adjustment device can be installed at the end of the third motor 241 to determine whether the electric three-jaw chuck 232 can rotate. If the electric three-jaw chuck 232 cannot rotate, the third motor 241 will be stopped immediately.

[0082] If the initial state of the slot 310 is not in a vertically upward position, the positioning block 530 will fit into the slot 310 again after the pipe 300 rotates at a certain angle. At this time, 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 the two pipes 300, the third motor 241 drives the first gear 242 to rotate clockwise, and drives 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. The arc-shaped block 246 will immediately drive the ring 243 and the electric three-jaw chuck 232 to rotate counterclockwise, and thus drive the pipe 300 to rotate counterclockwise.

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

[0085] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A positioning and welding apparatus for pipe butt joining, comprising a base (100), characterized in that: The middle part of the base (100) is provided with a shell (110), both ends of the shell (110) are slidably provided with a pipe (300), and a slit (310) is formed in the pipe (300). The middle part of the shell (110) is provided with a welding mechanism (400), and two positioning mechanisms (500) are symmetrically arranged in the shell (110). The positioning mechanism (500) comprises a sliding groove (510) formed in the shell (110), a first sliding seat (520) slidably arranged in the sliding groove (510), and a positioning block (530) slidably arranged on the first sliding seat (520). The positioning block (530) is matched with the slit (310). By pushing the pipe (300) to the middle end of the shell (110) spirally, until the positioning block (530) is embedded into the slit (310), so that the pipe (300) stops rotating, 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).

2. A pipe butt welding apparatus according to claim 1, wherein: The first sliding seat (520) is elastically connected to the inner wall of the shell (110) by a first spring (540), and a limiting rod (550) is arranged on the positioning block (530). The limiting rod (550) is slidably connected to the first sliding seat (520), and the limiting rod (550) is elastically connected to the first sliding seat (520) by a second spring (560). A first limiting groove (570) and a second limiting groove (580) are formed in the shell (110) and are connected. 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 in the first limiting groove (570) and the second limiting groove (580).

3. A pipe butt welding apparatus according to claim 1, wherein: The welding mechanism (400) comprises a welding torch (410) arranged on the shell (110), and the welding torch (410) is aligned with the splicing position of the two pipes (300). A welding wire (420) is slidably arranged on the shell (110). A first motor (430) is arranged on the shell (110), a winding drum (440) is arranged on the output shaft of the first motor (430), the welding wire (420) is wound on the winding drum (440), and the first motor (430) drives the winding drum (440) to rotate, so that the welding wire (420) surrounds the splicing position of the two pipes (300) once.

4. The pipe butt welding apparatus according to claim 1, wherein: Both sides of the base (100) are provided with feeding tracks (120), and the two feeding tracks (120) are used for conveying the two pipes (300). The middle part of the base (100) is provided with a discharging track (130), and the discharging track (130) is located below the shell (110). The discharging track (130) is used for conveying the two pipes (300) welded into one. The lower end of the shell (110) is provided with a bottom cover (150) through a hinge shaft (140).

5. A pipe butt welding apparatus according to claim 4, wherein: The base (100) is provided with a first connecting seat (160), and the bottom cover (150) is provided with a second connecting seat (170). Further comprising a cylinder (180), both ends of the cylinder (180) are provided with a rotating shaft (190), and the two rotating shafts (190) are rotatably connected to the first connecting seat (160) and the second connecting seat (170) respectively.

6. A pipe butt welding apparatus as claimed in claim 1, wherein: Both sides of the shell (110) are provided with a feeding mechanism (200), and the two feeding mechanisms (200) are used to convey two pipes (300) from both ends of the shell (110) to the middle end of the shell (110). The feeding mechanism (200) comprises a lead screw conveying device (210) arranged on the base (100), and the lead screw conveying device (210) is used to drive the displacement of a push rod (220) to push the pipe (300) through the push rod (220). The feeding mechanism (200) further comprises a clamping assembly (230) and a rotating assembly (240), the clamping assembly (230) is used for clamping the pipe (300), and the rotating assembly (240) is used for driving the pipe (300) to rotate.

7. A pipe butt welding apparatus as claimed in claim 6, wherein: The lead screw conveying device (210) comprises a mounting seat (211) arranged on the base (100), a sliding block (212) is slidingly arranged on the mounting seat (211), the push rod (220) is connected with the sliding block (212), a second motor (213) is arranged on the mounting seat (211), a lead screw (214) is arranged on the output shaft of the second motor (213), a nut (215) is threadedly connected on the lead screw (214), and the sliding block (212) is connected with the nut (215).

8. A pipe butt welding apparatus according to claim 7, wherein: The clamping assembly (230) comprises a second sliding seat (231) slidingly 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 sliding block (212), and the second connecting rod (234) is slidingly connected on the first connecting rod (233).

9. A pipe butt welding apparatus according to claim 8, wherein: The rotating assembly (240) comprises 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 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 engaged with the first gear (242).

10. A pipe butt welding apparatus according to claim 9, wherein: The circular ring (243) is rotationally connected to the motorized three-jaw chuck (232), an arc-shaped slot (245) is formed in the circular ring (243), an arc-shaped block (246) is arranged on the second gear (244), the arc-shaped block (246) is slidingly connected in the arc-shaped slot (245), and the arc-shaped block (246) is elastically connected with the inner wall of the arc-shaped slot (245) through a third spring (247).

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