Pipeline welding device

Abstract

The invention provides a pipeline welding device, and belongs to the technical field of pipeline welding. The pipeline welding device comprises a rotary welding mechanism, a first lifting mechanism, a supporting plate, a moving mechanism, a first supporting mechanism, a clamping mechanism, a second supporting mechanism, a centering mechanism, a third supporting mechanism, a pressing mechanism and a lifting positioning mechanism. The multiple first lifting mechanisms are connected with the supporting plate, so that the multiple first lifting mechanisms are matched to drive the supporting plate to move up and down, the height of the supporting plate and the height of a pipeline placed on the first supporting mechanisms and the second supporting mechanisms are adjusted, and therefore it is guaranteed that the center line of the pipeline and the center line of the rotary welding mechanism are located at the same height; and therefore, pipelines of different specifications (diameters) can be welded, and the applicability of products is improved.

Description

Technical Field

[0001] This invention belongs to the field of pipeline welding technology, and specifically relates to a pipeline welding device. Background Technology

[0002] In related technologies, the difficulty in controlling welding quality during the butt welding of pipelines lies in: (1) Ensure that the centerlines of the two opposite pipes coincide: (2) Ensure that the ends of the two pipes are in contact and that the centerline of the welding torch is located within the contact end face of the two pipes; (3) Avoid the pipe from shaking during welding.

[0003] Existing technology (Chinese Utility Model Patent, Authorization Announcement No.: CN223313282U) discloses a pipe welding device, including a mounting plate. A welding assembly is disposed on one side of the mounting plate, and an auxiliary assembly is disposed on the outer side of the mounting plate. The welding assembly includes assembly rods fixedly connected to one side of the mounting plate. A mating ring is fixedly connected between two assembly rods, and a first worm gear is rotatably connected between the two mating rings. An electric telescopic rod is fixedly installed inside the first worm gear, and a welding torch nozzle is fixedly installed at the movable end of the electric telescopic rod. Concave frames are fixedly connected to the top and bottom of the assembly rods, and a first worm is rotatably connected between the two concave frames. The first worm meshes with the first worm gear. The pipe welding device provided by this utility model can solve the problem of easy breakage at the weld joint, eliminate safety hazards, and has a simple structure and convenient operation.

[0004] In this prior art, since the height of the pipe placed in the auxiliary component cannot be adjusted, it is impossible to make the centerline of pipes of different specifications coincide with the centerline of the mating ring. As a result, the product can only weld pipes of a single specification, thereby reducing the applicability of the product.

[0005] In conclusion, it is essential to design a welding device that can both ensure the quality of pipe welding and improve the applicability of products. Summary of the Invention

[0006] To address the problem in existing technologies where the centerline of pipes of different specifications cannot coincide with the centerline of the welding ring, thus limiting the product to welding only a single pipe specification and reducing its applicability, this invention provides a pipe welding device. This device connects multiple first lifting mechanisms to a support plate, allowing the lifting mechanisms to work together to move the support plate up and down. This adjusts the height of the support plate and the pipe placed on the first and second support mechanisms, ensuring that the centerline of the pipe is at the same height as the centerline of the rotating welding mechanism. This enables welding of pipes of different specifications (diameters), improving the product's applicability. The specific technical solution is as follows: A pipe welding apparatus includes: a rotary welding mechanism, a first lifting mechanism, a support plate, a moving mechanism, a first supporting mechanism, a clamping mechanism, a second supporting mechanism, a centering mechanism, a third supporting mechanism, a pressing mechanism, and a lifting and positioning mechanism; at least two first lifting mechanisms are located on both sides of the rotary welding mechanism; two support plates are located on both sides of the rotary welding mechanism and are respectively connected to at least two first lifting mechanisms; two moving mechanisms are respectively mounted on the two support plates; two first supporting mechanisms are respectively connected to the two moving mechanisms; two clamping mechanisms are respectively installed inside the two first supporting mechanisms; two second supporting mechanisms are respectively mounted on the two support plates and are located on the side of the first supporting mechanism closer to the rotary welding mechanism; two centering mechanisms are respectively installed inside the two second supporting mechanisms; two third supporting mechanisms are respectively mounted on the two support plates and are located on the side of the second supporting mechanism closer to the rotary welding mechanism; two pressing mechanisms are respectively mounted on the two third supporting mechanisms; and two lifting and positioning mechanisms are located on both sides of the rotary welding mechanism and are located between the rotary welding mechanism and the support plate.

[0007] In addition, the pipe welding apparatus in the above-mentioned technical solution provided by the present invention may also have the following additional technical features: In the above technical solution, in the embodiments of the present invention, the rotary welding mechanism includes: a first mounting frame, a slewing bearing, a rotating plate, a first electric push rod, a first connecting plate, and a welding torch; the first mounting frame is provided with a first clearance hole; the inner ring of the slewing bearing is mounted on the first mounting frame; the rotating plate is provided with a second clearance hole and is mounted on the outer ring of the slewing bearing; the first electric push rod is mounted on the rotating plate; the first connecting plate is connected to the first electric push rod; the welding torch is mounted on the first connecting plate; wherein, the centerline of the first clearance hole, the centerline of the slewing bearing, and the centerline of the second clearance hole coincide.

[0008] In the above technical solution, the moving mechanism includes: a first slide block, a first slide rail, a first rack, a first motor, and a first gear; a first slide groove is provided in the first slide block, and at least two first slide blocks are installed at the bottom of the first support mechanism; two first slide rails are installed on the support plate, and the two first slide rails respectively pass through the first slide grooves of at least two first slide blocks; a first rack is installed on the support plate, and the first rack is located between the two first slide rails; a first motor is installed in the first support mechanism; a first gear is connected to the first motor, and the first gear meshes with the first rack.

[0009] In the above technical solution, the first lifting mechanism includes: a first fixed plate, a first lead screw, a first movable block, a first inclined surface, and an adjusting seat; two first fixed plates are fixed on the ground, with a gap between them, and the two first fixed plates are located below the support plate; the outer wall of the first lead screw is symmetrically provided with first external threads in opposite directions, and the two ends of the first lead screw are rotatably connected to the two first fixed plates respectively; the two first movable blocks are respectively provided with first internal threads in opposite directions, and the two first movable blocks are symmetrically fitted on the outside of the first lead screw; two first inclined surfaces are respectively provided on the top of the two first movable blocks, and the two first inclined surfaces are arranged opposite to each other; the bottom of the adjusting seat is provided with a second inclined surface, the two adjusting seats are installed on the bottom of the support plate, and the second inclined surfaces of the two adjusting seats are respectively in contact with the two first inclined surfaces; wherein, the first external thread and the first internal thread are adapted to each other.

[0010] In the above technical solution, the first lifting mechanism further includes: a first guide seat and a first guide rod; the first guide seat is a hollow cavity with an opening at the top, and the two first guide seats are fixed on the ground; one end of the two first guide rods is respectively embedded in the two first guide seats, and the other end of the two first guide rods is connected to the bottom of the support plate.

[0011] In the above technical solution, the clamping mechanism includes: an adjusting mechanism, an adjusting plate, a second mounting bracket, a second electric push rod, and a clamping seat; the adjusting mechanism is installed inside the first support mechanism; two adjusting plates are located inside the first support mechanism, and both adjusting plates are simultaneously connected to the adjusting mechanism so that the adjusting mechanism can adjust the distance between the two adjusting plates; four second mounting brackets are respectively installed at both ends of the two adjusting plates; four second electric push rods are respectively installed inside the four second mounting brackets; the clamping seat is provided with a clamping groove, and the four clamping seats are respectively connected to the four second electric push rods, and the clamping seats are located above the second mounting brackets.

[0012] In the above technical solution, the adjusting mechanism includes: a second motor, a second gear, a second rack, a second slide block, and a second slide rail; the second motor is installed at the bottom of the first support mechanism; the second gear is located inside the first support mechanism and is connected to the second motor; two second racks are placed inside the first support mechanism, the two second racks mesh with the two sides of the second gear respectively, and the two second racks are connected to the two adjusting plates respectively; a second slide groove is provided inside the second slide block, and at least two second slide blocks are installed at the bottom of the two adjusting plates respectively; two second slide rails are installed inside the first support mechanism, and the two second slide rails pass through the second slide grooves of at least two second slide blocks respectively.

[0013] In the above technical solution, the centering mechanism includes: a second lead screw, a second moving block, and a guide roller; the outer wall of the second lead screw is symmetrically provided with second external threads in opposite directions, and the second lead screw is installed in the second support mechanism; the two second moving blocks are respectively provided with second internal threads in opposite directions, and the two second moving blocks are symmetrically fitted on the outside of the second lead screw; the two guide rollers are rotatably connected to the top of the two second moving blocks respectively; wherein, the second external thread is adapted to the second internal thread.

[0014] In the above technical solution, the clamping mechanism includes: a third mounting frame, a third electric push rod, a lifting plate, a second fixed plate, a clamping roller shaft, a second guide seat, and a second guide rod; the third mounting frame is installed on the top of the third support mechanism; the third electric push rod is installed on the third mounting frame; the lifting plate is located inside the third mounting frame and is connected to the third electric push rod; four second fixed plates are installed at the bottom of the lifting plate and are arranged opposite to each other in pairs; both ends of the clamping roller shaft are rotatably connected to the two opposite second fixed plates respectively; two second guide seats are installed on the third mounting frame and are located on both sides of the third electric push rod; one end of the two second guide rods is connected to the lifting plate, and the other ends of the two second guide rods pass through the third mounting frame and the second guide seat respectively in sequence.

[0015] In the above technical solution, the lifting and positioning mechanism includes: a fourth mounting frame, a third fixed plate, a third lead screw, a third moving block, and a positioning plate; the fourth mounting frame is L-shaped and is installed on the ground; the third fixed plate is installed inside the fourth mounting frame; the outer wall of the third lead screw is provided with a third external thread, one end of the third lead screw is rotatably connected to the top of the fourth mounting frame, and the other end of the third lead screw is rotatably connected to the third fixed plate; the two third moving blocks are provided with third internal threads, and the third moving blocks are fitted on the outside of the third lead screw; the positioning plate is connected to both third moving blocks, and the positioning plate is located on the side of the fourth mounting frame closer to the support plate; wherein, the third external thread and the third internal thread are compatible.

[0016] The pipe welding apparatus of the present invention has the following advantages compared with the prior art: 1. By connecting multiple first lifting mechanisms to the support plate, the multiple first lifting mechanisms work together to drive the support plate to move up and down, thereby adjusting the height of the support plate and the pipe placed on the first and second support mechanisms. This ensures that the centerline of the pipe is at the same height as the centerline of the rotary welding mechanism, thus enabling the welding of pipes of different specifications (diameters) and improving the applicability of the product. By using a centering mechanism to correct the position of the pipes and a clamping mechanism to press the pipes onto the third support mechanism, the centerlines of the two pipes are ensured to be on the same plane, thus ensuring that the ends of the two pipes can fit together. This also prevents the pipes from shaking when the rotary welding mechanism welds them, improving the quality of the pipe welding. Furthermore, by using a lifting and positioning mechanism to initially position the pipes, the moving mechanism can move the pipes a predetermined distance (the distance between the lifting and positioning mechanism and the rotary welding mechanism), ensuring precise docking of the two pipes. This ensures that the welding point of the rotary welding mechanism is located within the mating end faces of the two pipes, preventing collisions due to excessive pipe movement or failure to dock due to insufficient movement, further improving the quality of the pipe welding.

[0017] 2. By mounting the first electric push rod on the rotating plate, connecting the first connecting plate to the first electric push rod, and mounting the welding torch on the first connecting plate, the first connecting plate supports the welding torch, thereby enabling the first electric push rod to drive the welding torch to move, adjust the rotation diameter of the welding torch, and thus enable the welding torch to weld pipes of different diameters, thereby improving the applicability of the product.

[0018] 3. By installing the first motor inside the first support mechanism, connecting the first gear to the first motor, and meshing the first gear with the first rack, the first motor drives the first gear to rotate, thereby enabling the first gear to mesh with the first rack and move, providing power for moving the first support mechanism. Furthermore, by controlling the number of rotations of the first gear driven by the first motor, the movement distance of the first support mechanism and the pipe placed on the first support mechanism can be controlled to ensure that the two pipes are connected, thereby improving the user experience of the product.

[0019] 4. By installing two adjusting seats at the bottom of the support plate and making the second inclined surfaces of the two adjusting seats fit into the first inclined surfaces of the two first moving blocks respectively, when the first lead screw drives the two first moving blocks to move relative to each other, the first moving blocks press the adjusting seats and the support plate upward through the first and second inclined surfaces, thereby adjusting the height of the support plate and the pipe to ensure that the centerline of the two pipes and the centerline of the second clearance hole coincide, thereby improving the welding effect of the rotating welding torch on the two pipes. At the same time, it can also enable the welding torch to weld pipes of different specifications, thereby improving the applicability of the product.

[0020] 5. By fixing two first guide seats on the ground, embedding one end of each of the two first guide rods into the two first guide seats respectively, and connecting the other end of the two first guide rods to the bottom of the support plate, the support plate and the two first guide rods can move up and down synchronously. This allows the first guide seats to guide the first guide rods, preventing the first guide rods and the support plate from shifting during up and down movement, thereby improving the stability of the support plate's up and down movement.

[0021] 6. When the pipe to be welded is placed on the first support mechanism, four second electric push rods are simultaneously activated, causing the second electric push rods to move the clamping seats upward, so that the clamping grooves of the clamping seats are aligned with the pipe, thus adapting to pipes of different specifications and improving the applicability of the product; then, the adjustment mechanism is activated, causing the adjustment mechanism to move the two adjustment plates and the four clamping seats relative to each other, so that the four clamping seats cooperate to clamp the pipe, thereby realizing the synchronous movement of the pipe and the first support mechanism, so as to control the movement distance of the pipe, ensuring that the two pipes are connected, and improving the quality of pipe welding.

[0022] 7. By meshing the two second racks with the two sides of the second gear respectively, and connecting the two second racks to the two adjusting plates respectively, when the second gear rotates, the second gear drives the two second racks to move in opposite directions, thereby enabling the two second racks to drive the two adjusting plates to move in opposite or opposite directions respectively, thereby adjusting the distance between the two adjusting plates so that the four clamping seats cooperate to clamp the pipe.

[0023] 8. By rotatably connecting the two guide rollers to the top of the two second moving blocks respectively, the two second moving blocks can drive the two guide rollers to move respectively, thereby enabling the two guide rollers to cooperate in correcting the position of the pipe, thus ensuring that the axes of the two pipes are aligned, thereby improving the welding quality of the two pipes.

[0024] 9. By installing two second guide seats on the third mounting frame, connecting one end of the two second guide rods to the lifting plate, and allowing the other end of the second guide rods to pass through the third mounting frame and the second guide seats in sequence, the two second guide rods and the lifting plate can move up and down synchronously. This allows the second guide seats to guide the second guide rods, preventing them from shifting during up and down movement. This improves the stability of the up and down movement of the lifting plate and the pressing roller shaft, ensuring that the pressing roller shaft presses the pipe firmly onto the third support mechanism. This prevents the pipe from shaking during welding and improves the quality of pipe welding.

[0025] 10. By fitting two third moving blocks onto the outside of the third lead screw, and connecting the positioning plate to both third moving blocks simultaneously, the two third moving blocks are threadedly connected to the third lead screw, and the two third moving blocks and the positioning plate move up and down synchronously. This allows the third lead screw to rotate, causing it to drive the positioning plate to move up and down. This enables the positioning plate to move above the third support mechanism for initial positioning of the pipeline. At the same time, the positioning plate can also move below the third support mechanism to ensure that the pipeline can move below the welding torch. Attached Figure Description

[0026] Figure 1 This is a top view of a pipe welding apparatus according to the present invention; Figure 2 for Figure 1 Enlarged view of a portion at point A; Figure 3 for Figure 1 A magnified view of section B; Figure 4 for Figure 1 A magnified view of a portion at point C; Figure 5 for Figure 1 Sectional view at DD; Figure 6 for Figure 5 A magnified view of a portion at point E; Figure 7 for Figure 5 A magnified view of a portion at point F; Figure 8 for Figure 5 A magnified view of a portion of point G; Figure 9 for Figure 5 Enlarged view of a portion at point H; Figure 10 for Figure 5 A magnified view of a portion of point I; Figure 11 This is a front view of a pipe welding apparatus according to the present invention; Figure 12 for Figure 11A magnified view of a portion of point J; in, Figures 1 to 12 The correspondence between the reference numerals and component names in the attached drawings is as follows: 10 Rotary welding mechanism, 101 First mounting bracket, 102 Slewing bearing, 103 Rotary plate, 104 First electric push rod, 105 First connecting plate, 106 Welding torch, 11 First lifting mechanism, 111 First fixed plate, 112 First lead screw, 113 First moving block, 114 First inclined plane, 115 Adjusting seat, 116 First guide seat, 117 First guide rod, 12 Support plate, 13 Moving mechanism, 131 First slide block, 132 First slide rail, 133 First rack, 134 First motor, 135 First gear, 14 First support mechanism, 15 Clamping mechanism, 151 Adjusting mechanism, 1511 Second motor, 1512 Second gear, 15 13 Second rack, 1514 Second slide block, 1515 Second slide rail, 152 Adjusting plate, 153 Second mounting bracket, 154 Second electric push rod, 155 Clamping seat, 16 Second support mechanism, 17 Centering mechanism, 171 Second lead screw, 172 Second moving block, 173 Guide roller, 18 Third support mechanism, 19 Pressing mechanism, 191 Third mounting bracket, 192 Third electric push rod, 193 Lifting plate, 194 Second fixed plate, 195 Pressing roller shaft, 196 Second guide seat, 197 Second guide rod, 20 Lifting and positioning mechanism, 201 Fourth mounting bracket, 202 Third fixed plate, 203 Third lead screw, 204 Third moving block, 205 Positioning plate. Detailed Implementation

[0027] The following are specific implementation cases and appendices. Figures 1 to 12 The present invention will be further described, but the present invention is not limited to these embodiments.

[0028] A pipe welding apparatus, such as Figures 1 to 12As shown, the pipe welding device includes: a rotary welding mechanism 10, a first lifting mechanism 11, a support plate 12, a moving mechanism 13, a first support mechanism 14, a clamping mechanism 15, a second support mechanism 16, a centering mechanism 17, a third support mechanism 18, a pressing mechanism 19, and a lifting and positioning mechanism 20; at least two first lifting mechanisms 11 are located on both sides of the rotary welding mechanism 10; two support plates 12 are located on both sides of the rotary welding mechanism 10, and the two support plates 12 are respectively connected to at least two first lifting mechanisms 11; two moving mechanisms 13 are respectively installed on the two support plates 12; two first support mechanisms 14 are respectively connected to the two moving mechanisms 13; and two clamping mechanisms 15 are respectively installed on the two support plates 12. Within the two first support mechanisms 14; two second support mechanisms 16 are respectively installed on the two support plates 12, and the two second support mechanisms 16 are located on the side of the first support mechanism 14 near the rotary welding mechanism 10; two centering mechanisms 17 are respectively installed within the two second support mechanisms 16; two third support mechanisms 18 are respectively installed on the two support plates 12, and the two third support mechanisms 18 are located on the side of the second support mechanism 16 near the rotary welding mechanism 10; two clamping mechanisms 19 are respectively installed on the two third support mechanisms 18; two lifting and positioning mechanisms 20 are located on both sides of the rotary welding mechanism 10, and the lifting and positioning mechanisms 20 are located between the rotary welding mechanism 10 and the support plate 12.

[0029] By positioning multiple first lifting mechanisms 11 on both sides of the rotary welding mechanism 10 and connecting two support plates 12 to the multiple first lifting mechanisms 11 respectively, the first lifting mechanisms 11 can drive the support plates 12 to move up and down, thereby adjusting the height of the support plates 12. By installing a moving mechanism 13 on the support plate 12 and connecting a first support mechanism 14 to the moving mechanism 13, the support plate 12 can drive the moving mechanism 13 to move up and down, thereby enabling the moving mechanism 13 to drive the first support mechanism 14 to move, thereby adjusting the distance between the first support mechanism 14 and the rotary welding mechanism 10. By installing a clamping mechanism 15 inside the first support mechanism 14, when the pipe to be welded is placed on the first support mechanism 14, the clamping mechanism 15 can clamp the pipe, thereby enabling the first support mechanism 14 to drive the pipe to move. By mounting the second support mechanism 16 on the support plate 12 and the centering mechanism 17 inside the second support mechanism 16, the support plate 12 and the second support mechanism 16 move up and down synchronously. This allows the second support mechanism 16 to support the pipe to be welded, while the centering mechanism 17 corrects the pipe placed on the second support mechanism 16, ensuring that the centerline of the pipe is on the same plane as the centerline of the second support mechanism 16, thus positioning the pipe. By mounting the third support mechanism 18 on the support plate 12 and the clamping mechanism 19 on the third support mechanism 18, the support plate 12 and the third support mechanism 18 move up and down synchronously. This allows the third support mechanism 18 to support the pipe to be welded, while the clamping mechanism 19 clamps the pipe onto the third support mechanism 18, improving the stability of the pipe. By positioning the lifting and positioning mechanism 20 between the rotating welding mechanism 10 and the support plate 12, the lifting and positioning mechanism 20 can perform preliminary positioning of the pipe, thereby improving the accuracy of the pipe's position.

[0030] In practical application, the two pipes to be welded are first placed on the two first support mechanisms 14 and the two second support mechanisms 16, respectively. Then, the two centering mechanisms 17 are activated to correct the position of the two pipes, so that the centerlines of the two pipes are on the same horizontal plane. Next, the two clamping mechanisms 15 are activated to clamp the pipes. Then, multiple first lifting mechanisms 11 are activated to move the two support plates 12 up and down to adjust the height of the pipes, so that the centerline of the pipes is at the same height as the centerline of the rotary welding mechanism 10. Finally, the two lifting and positioning mechanisms 20 are activated to position the positioning part of the lifting and positioning mechanism 20 at the third support mechanism. Above the third support structure 18; then, activate two moving mechanisms 13, which respectively drive the two first support mechanisms 14 and the two pipes to move, so that the two pipes are respectively in contact with the two lifting and positioning mechanisms 20, so that the lifting and positioning mechanisms 20 position the pipes; then, activate the lifting and positioning mechanisms 20, so that the entire lifting and positioning mechanism 20 is below the third support structure 18; then, activate the moving mechanism 13, which drives the first support mechanism 14 and the pipes to move a predetermined distance, so that the ends of the two pipes are in contact and the centerlines of the two pipes are aligned; then, activate the rotary welding mechanism 10, which welds the ends of the two pipes together.

[0031] By adopting the above structure, multiple first lifting mechanisms 11 are connected to the support plate 12, so that the multiple first lifting mechanisms 11 cooperate to drive the support plate 12 to move up and down, thereby adjusting the height of the support plate 12 and the pipe placed on the first support mechanism 14 and the second support mechanism 16, thereby ensuring that the centerline of the pipe is at the same height as the centerline of the rotary welding mechanism 10, and thus enabling the welding of pipes of different specifications (diameters) to improve the applicability of the product. By using the centering mechanism 17 to correct the position of the pipes and the clamping mechanism 19 to press the pipes onto the third support mechanism 18, the centerlines of the two pipes are ensured to be on the same plane, thus ensuring that the ends of the two pipes can fit together. At the same time, it can also prevent the pipes from shaking when the rotary welding mechanism 10 welds the two pipes, thereby improving the quality of pipe welding. By using the lifting and positioning mechanism 20 to initially position the pipes, the moving mechanism 13 can drive the pipes to move a predetermined distance (the distance between the lifting and positioning mechanism 20 and the rotary welding mechanism 10), which can ensure that the two pipes are accurately connected. This avoids the situation where the two pipes collide due to excessive pipe movement distance, and also avoids the situation where the two pipes cannot be connected due to insufficient pipe movement distance, further improving the quality of pipe welding.

[0032] Specifically, the first support mechanism 14 includes a first support frame and two first support rollers. The two first support rollers are installed inside the first support frame and are rotatably connected to the first support frame so that the pipe can be placed on the two first support rollers; wherein, the clamping mechanism 15 is installed inside the first support frame.

[0033] Specifically, the second support mechanism 16 includes a second support frame and two second support rollers. The two second support rollers are installed inside the second support frame and are rotatably connected to the second support frame so that the pipe can be placed on the two second support rollers; wherein, the centering mechanism 17 is installed inside the second support frame.

[0034] Specifically, the third support mechanism 18 includes a third support frame and two third support rollers. The two third support rollers are installed inside the third support frame and are rotatably connected to the third support frame so that the pipe can be placed on the two third support rollers; wherein, the clamping mechanism 19 is installed on the top of the third support frame.

[0035] In embodiments of the present invention, such as Figure 2 and Figure 5 As shown, the rotary welding mechanism 10 includes: a first mounting frame 101, a slewing bearing 102, a rotating plate 103, a first electric push rod 104, a first connecting plate 105, and a welding torch 106; the first mounting frame 101 is provided with a first clearance hole; the inner ring of the slewing bearing 102 is mounted on the first mounting frame 101; the rotating plate 103 is provided with a second clearance hole and is mounted on the outer ring of the slewing bearing 102; the first electric push rod 104 is mounted on the rotating plate 103; the first connecting plate 105 is connected to the first electric push rod 104; the welding torch 106 is mounted on the first connecting plate 105; wherein, the centerline of the first clearance hole, the centerline of the slewing bearing 102, and the centerline of the second clearance hole coincide.

[0036] By mounting the inner ring of the slewing bearing 102 on the first mounting bracket 101 and mounting the rotating plate 103 on the outer ring of the slewing bearing 102, the rotating plate 103 can rotate relative to the first mounting bracket 101. By mounting the first electric push rod 104 on the rotating plate 103, connecting the first connecting plate 105 to the first electric push rod 104, and mounting the welding torch 106 on the first connecting plate 105, the first connecting plate 105 supports the welding torch 106, thereby enabling the first electric push rod 104 to drive the welding torch 106 to move, thereby adjusting the rotation diameter of the welding torch 106, and thus enabling the welding torch 106 to weld pipes of different diameters, thereby improving the applicability of the product.

[0037] Specifically, the annular sliding contact line is mounted on the first mounting bracket 101, and the welding torch 106 is electrically connected to the annular sliding contact line.

[0038] In embodiments of the present invention, such as Figure 6 and Figure 12 As shown, the moving mechanism 13 includes: a first slide block 131, a first slide rail 132, a first rack 133, a first motor 134, and a first gear 135; the first slide block 131 is provided with a first slide groove, and at least two first slide blocks 131 are installed at the bottom of the first support mechanism 14; two first slide rails 132 are installed on the support plate 12, and the two first slide rails 132 respectively pass through the first slide grooves of at least two first slide blocks 131; the first rack 133 is installed on the support plate 12, and the first rack 133 is located between the two first slide rails 132; the first motor 134 is installed in the first support mechanism 14; the first gear 135 is connected to the first motor 134, and the first gear 135 meshes with the first rack 133.

[0039] By mounting two first slide rails 132 on the support plate 12 and mounting multiple first slide blocks 131 on the bottom of the first support mechanism 14, and allowing the first slide rails 132 to pass through the first slide grooves of the first slide blocks 131, the first support mechanism 14 can move along the first slide rails 132 via the first slide blocks 131, thereby adjusting the distance between the first support mechanism 14 and the rotary welding mechanism 10. By mounting a first motor 134 inside the first support mechanism 14, connecting a first gear 135 to the first motor 134, and meshing the first gear 135 with the first rack 133, the first motor 134 drives the first gear 135 to rotate, thereby enabling the first gear 135 to mesh with the first rack 133 and move, providing power for moving the first support mechanism 14. Furthermore, by controlling the number of rotations of the first gear 135 driven by the first motor 134, the moving distance of the first support mechanism 14 and the pipe placed on the first support mechanism 14 can be controlled to ensure that the two pipes are connected, thereby improving the user experience of the product.

[0040] Specifically, two baffles are installed at both ends of the first slide rail 132 so that the baffles can limit the first slide block 131, thereby preventing the first support mechanism 14 from moving off the first slide rail 132.

[0041] In embodiments of the present invention, such as Figure 7 and Figure 10As shown, the first lifting mechanism 11 includes: a first fixed plate 111, a first lead screw 112, a first moving block 113, a first inclined plane 114, and an adjusting seat 115; two first fixed plates 111 are fixed to the ground, with a gap between them, and the two first fixed plates 111 are located below the support plate 12; the outer wall of the first lead screw 112 is symmetrically provided with first external threads in opposite directions, and the two ends of the first lead screw 112 are rotatably connected to the two first fixed plates 111 respectively; two first moving blocks The first internal threads with opposite spiral directions are respectively provided in the first moving blocks 113. The two first moving blocks 113 are symmetrically fitted on the outside of the first lead screw 112. The two first inclined surfaces 114 are respectively provided on the top of the two first moving blocks 113 and are arranged opposite to each other. The bottom of the adjusting seat 115 is provided with a second inclined surface. The two adjusting seats 115 are installed on the bottom of the support plate 12. The second inclined surfaces of the two adjusting seats 115 are respectively in contact with the two first inclined surfaces 114. The first external thread is adapted to the first internal thread.

[0042] By fixing two first fixed plates 111 to the ground and rotatably connecting the two ends of the first lead screw 112 to the two first fixed plates 111 respectively, the two first fixed plates 111 cooperate to support the first lead screw 112, thereby enabling the first lead screw 112 to rotate between the two first fixed plates 111. By symmetrically fitting two first moving blocks 113 onto the outside of the first lead screw 112 and symmetrically providing first external threads with opposite helical directions on the outer wall of the first lead screw 112, the two first moving blocks 113 are simultaneously threadedly connected to the first lead screw 112, thereby enabling the rotation of the first lead screw 112 to drive the two first moving blocks 113 to move in opposite or opposite directions, thus adjusting the distance between the two first moving blocks 113. By installing two adjusting seats 115 at the bottom of the support plate 12 and making the second inclined surfaces of the two adjusting seats 115 fit against the first inclined surfaces 114 on the two first moving blocks 113 respectively, when the first lead screw 112 drives the two first moving blocks 113 to move relative to each other, the first moving blocks 113 press the adjusting seats 115 and the support plate 12 upward through the first inclined surfaces 114 and the second inclined surfaces, thereby adjusting the height of the support plate 12 and the pipe, so as to ensure that the centerline of the two pipes and the centerline of the second clearance hole coincide, thereby improving the welding effect of the rotating welding torch 106 on the two pipes. At the same time, it can also enable the welding torch 106 to weld pipes of different specifications, thereby improving the applicability of the product.

[0043] Specifically, the first lifting mechanism 11 further includes a first guide bar and a first drive mechanism. The two ends of the first guide bar are respectively connected to two first fixed plates 111, and the first guide bar passes sequentially through two first moving blocks 113, enabling the two first moving blocks 113 to move along the first guide bar, thereby preventing the two first moving blocks 113 from deviating during movement and improving the stability of their movement. The first drive mechanism is connected to a first lead screw 112, causing the first drive mechanism to drive the first lead screw 112 to rotate, thus providing power for rotating the first lead screw 112. By controlling the number of rotations of the first lead screw 112 driven by the first drive mechanism, the distance the two first moving blocks 113 move is controlled, thereby precisely controlling the vertical movement distance of the support plate 12 and the pipe, and thus improving the quality of pipe welding.

[0044] In embodiments of the present invention, such as Figure 10 As shown, the first lifting mechanism 11 further includes: a first guide seat 116 and a first guide rod 117; the first guide seat 116 is a hollow cavity with an opening at the top, and the two first guide seats 116 are fixed on the ground; one end of the two first guide rods 117 is respectively embedded in the two first guide seats 116, and the other end of the two first guide rods 117 is connected to the bottom of the support plate 12.

[0045] By fixing two first guide seats 116 to the ground, embedding one end of each of the two first guide rods 117 into the two first guide seats 116 respectively, and connecting the other end of the two first guide rods 117 to the bottom of the support plate 12, the support plate 12 and the two first guide rods 117 can move up and down synchronously. This allows the first guide seats 116 to guide the first guide rods 117, preventing the first guide rods 117 and the support plate 12 from shifting during up and down movement, thereby improving the stability of the support plate 12 during up and down movement.

[0046] In embodiments of the present invention, such as Figure 8 As shown, the clamping mechanism 15 includes: an adjusting mechanism 151, an adjusting plate 152, a second mounting bracket 153, a second electric push rod 154, and a clamping seat 155; the adjusting mechanism 151 is installed inside the first support mechanism 14; two adjusting plates 152 are located inside the first support mechanism 14, and both adjusting plates 152 are simultaneously connected to the adjusting mechanism 151 so that the adjusting mechanism 151 can adjust the distance between the two adjusting plates 152; four second mounting brackets 153 are respectively installed at both ends of the two adjusting plates 152; four second electric push rods 154 are respectively installed inside the four second mounting brackets 153; the clamping seat 155 is provided with a clamping groove, and the four clamping seats 155 are respectively connected to the four second electric push rods 154, and the clamping seat 155 is located above the second mounting bracket 153.

[0047] By installing the adjustment mechanism 151 inside the first support mechanism 14 and connecting the two adjustment plates 152 to the adjustment mechanism 151 simultaneously, the adjustment mechanism 151 can drive the two adjustment plates 152 to move in opposite or opposite directions, thereby adjusting the distance between the two adjustment plates 152. By installing four second mounting brackets 153 at the two ends of the two adjustment plates 152 respectively, installing four second electric push rods 154 inside the four second mounting brackets 153 respectively, and connecting four clamping seats 155 to the four second electric push rods 154 respectively, the second mounting brackets 153 support the second electric push rods 154, thereby enabling the adjustment plates 152 to drive the second electric push rods 154 and clamping seats 155 to move, and at the same time, enabling the second electric push rods 154 to drive the clamping seats 155 to move up and down.

[0048] With the above structure, when the pipe to be welded is placed on the first support mechanism 14, four second electric push rods 154 are simultaneously activated, causing the second electric push rods 154 to drive the clamping seats 155 to move upward, so that the clamping grooves of the clamping seats 155 are aligned with the pipe, in order to adapt to pipes of different specifications and thus improve the applicability of the product; then, the adjustment mechanism 151 is activated, causing the adjustment mechanism 151 to drive the two adjustment plates 152 and the four clamping seats 155 to move relative to each other, so that the four clamping seats 155 cooperate to clamp the pipe, thereby realizing the synchronous movement of the pipe and the first support mechanism 14, so as to control the movement distance of the pipe, to ensure that the two pipes are connected, and to improve the quality of pipe welding.

[0049] In embodiments of the present invention, such as Figure 8 As shown, the adjustment mechanism 151 includes: a second motor 1511, a second gear 1512, a second rack 1513, a second slide block 1514, and a second slide rail 1515; the second motor 1511 is installed at the bottom of the first support mechanism 14; the second gear 1512 is located inside the first support mechanism 14 and is connected to the second motor 1511; two second racks 1513 are placed inside the first support mechanism 14, and the two second racks 1513 mesh with the two sides of the second gear 1512 respectively, and the two second racks 1513 are respectively connected to two adjustment plates 152; the second slide block 1514 is provided with a second slide groove, and at least two second slide blocks 1514 are respectively installed at the bottom of the two adjustment plates 152; two second slide rails 1515 are installed inside the first support mechanism 14, and the two second slide rails 1515 pass through the second slide grooves of at least two second slide blocks 1514 respectively.

[0050] By mounting the second motor 1511 at the bottom of the first support mechanism 14 and connecting the second gear 1512 to the second motor 1511, the second motor 1511 can drive the second gear 1512 to rotate within the first support mechanism 14. By meshing the two second racks 1513 with the two sides of the second gear 1512 respectively and connecting the two second racks 1513 to the two adjusting plates 152 respectively, when the second gear 1512 rotates, the second gear 1512 drives the two second racks 1513 to move in opposite directions, thereby enabling the two second racks 1513 to drive the two adjusting plates 152 to move in opposite or opposite directions, thereby adjusting the distance between the two adjusting plates 152 so that the four clamping seats 155 cooperate to clamp the pipe. By installing multiple second slide blocks 1514 at the bottom of the two adjusting plates 152 respectively, installing two second slide rails 1515 inside the first support mechanism 14, and allowing the two second slide rails 1515 to pass through the second slide grooves of the multiple second slide blocks 1514 respectively, the adjusting plate 152 can move along the second slide rails 1515 through the second slide blocks 1514, thereby preventing the adjusting plate 152 from shifting during movement, improving the stability of the movement of the adjusting plate 152, and thus ensuring that the clamping seat 155 can clamp the pipe.

[0051] Specifically, the third slide is disposed within the first support mechanism 14 and is located below the second rack 1513; the slider is connected to the bottom of the second rack 1513 and is embedded in the third slide, so that the second rack 1513 moves along the third slide via the slider, thereby preventing the second rack 1513 from deviating during movement and improving the stability of the movement of the second rack 1513.

[0052] In embodiments of the present invention, such as Figure 3 As shown, the centering mechanism 17 includes: a second lead screw 171, a second moving block 172, and a guide roller 173; the outer wall of the second lead screw 171 is symmetrically provided with second external threads in opposite directions, and the second lead screw 171 is installed in the second support mechanism 16; the two second moving blocks 172 are respectively provided with second internal threads in opposite directions, and the two second moving blocks 172 are symmetrically fitted on the outside of the second lead screw 171; the two guide rollers 173 are rotatably connected to the top of the two second moving blocks 172 respectively; wherein, the second external thread is adapted to the second internal thread.

[0053] By installing the second lead screw 171 inside the second support mechanism 16 and symmetrically fitting two second moving blocks 172 on the outside of the second lead screw 171, a threaded connection is achieved between the second lead screw 171 and the two second moving blocks 172. This allows the second lead screw 171 to rotate, causing it to drive the two second moving blocks 172 to move in opposite or opposite directions, thereby adjusting the distance between the two second moving blocks 172. By rotatably connecting two guide rollers 173 to the top of the two second moving blocks 172 respectively, the two second moving blocks 172 can drive the two guide rollers 173 to move respectively. This allows the two guide rollers 173 to cooperate in correcting the position of the pipe, thereby ensuring the alignment of the axes of the two pipes and improving the welding quality of the two pipes.

[0054] Specifically, the second optical bar is installed inside the second support mechanism 16, located below the second lead screw 171, and passes through two second moving blocks 172 in sequence, so that the two moving blocks 172 move along the second optical bar, thereby improving the stability of the movement of the two moving blocks 172; the second drive mechanism is installed on the outside of the second support mechanism 16, and the second drive mechanism is connected to the second lead screw 171, so that the second drive mechanism drives the second lead screw 171 to rotate, thereby providing power for rotating the second lead screw 171.

[0055] In embodiments of the present invention, such as Figure 4 and Figure 9 As shown, the clamping mechanism 19 includes: a third mounting bracket 191, a third electric push rod 192, a lifting plate 193, a second fixing plate 194, a clamping roller shaft 195, a second guide seat 196, and a second guide rod 197; the third mounting bracket 191 is mounted on the top of the third support mechanism 18; the third electric push rod 192 is mounted on the third mounting bracket 191; the lifting plate 193 is located inside the third mounting bracket 191, and the lifting plate 193 is connected to the third electric push rod 192; four second fixing plates 194 are mounted on... The bottom of the lifting plate 193 is provided with four second fixed plates 194 arranged in pairs opposite each other; the two ends of the pressure roller shaft 195 are rotatably connected to the two opposite second fixed plates 194 respectively; two second guide seats 196 are mounted on the third mounting frame 191 and are located on both sides of the third electric push rod 192; one end of the two second guide rods 197 is connected to the lifting plate 193 and the other end of the two second guide rods 197 passes through the third mounting frame 191 and the second guide seat 196 respectively.

[0056] By installing the third mounting bracket 191 on top of the third support mechanism 18, installing the third electric push rod 192 on the third mounting bracket 191, and connecting the lifting plate 193 to the third electric push rod 192, the third mounting bracket 191 supports the third electric push rod 192, thereby enabling the third electric push rod 192 to drive the lifting plate 193 to move up and down, thus adjusting the height of the lifting plate 193. By installing four second fixing plates 194 at the bottom of the lifting plate 193, with the four second fixing plates 194 arranged in pairs facing each other, and rotatably connecting both ends of the pressure roller shaft 195 to the two opposite second fixing plates 194, the two second fixing plates 194 cooperate to support the pressure roller shaft 195, thereby enabling the pressure roller shaft 195 to rotate between the two second fixing plates 194, thus enabling the lifting plate 193 to drive the pressure roller shaft 195 to move up and down, so that the pressure roller shaft 195 can press the pipe onto the third support mechanism 18. By mounting two second guide seats 196 on the third mounting bracket 191, connecting one end of two second guide rods 197 to the lifting plate 193, and allowing the other end of the second guide rods 197 to pass through the third mounting bracket 191 and the second guide seat 196 in sequence, the two second guide rods 197 and the lifting plate 193 can move up and down synchronously. This allows the second guide seat 196 to guide the second guide rods 197, preventing the second guide rods 197 from deviating during up and down movement. This improves the stability of the up and down movement of the lifting plate 193 and the pressing roller shaft 195, thereby ensuring that the pressing roller shaft 195 presses the pipe tightly onto the third support mechanism 18, preventing the pipe from shaking during welding and improving the quality of pipe welding.

[0057] In embodiments of the present invention, such as Figure 10 As shown, the lifting and positioning mechanism 20 includes: a fourth mounting frame 201, a third fixing plate 202, a third lead screw 203, a third moving block 204, and a positioning plate 205; the fourth mounting frame 201 is L-shaped and is mounted on the ground; the third fixing plate 202 is installed inside the fourth mounting frame 201; the outer wall of the third lead screw 203 is provided with a third external thread, one end of the third lead screw 203 is rotatably connected to the top of the fourth mounting frame 201, and the other end of the third lead screw 203 is rotatably connected to the third fixing plate 202; the two third moving blocks 204 are provided with third internal threads, and the third moving blocks 204 are fitted on the outside of the third lead screw 203; the positioning plate 205 is connected to both third moving blocks 204, and the positioning plate 205 is located on the side of the fourth mounting frame 201 near the support plate 12; wherein, the third external thread is adapted to the third internal thread.

[0058] By installing the third fixing plate 202 inside the fourth mounting bracket 201, rotatably connecting one end of the third lead screw 203 to the top of the fourth mounting bracket 201, and rotatably connecting the other end of the third lead screw 203 to the third fixing plate 202, the fourth mounting bracket 201 and the third fixing plate 202 cooperate to support the third lead screw 203, thereby enabling the third lead screw 203 to rotate within the fourth mounting bracket 201; by fitting two third moving blocks 204 onto the outside of the third lead screw 203, and simultaneously connecting the positioning plate 205 to the two third moving blocks 204, the third lead screw 203 is supported by the fourth mounting bracket 201 and the third fixing plate 202. The three moving blocks 204 are connected to achieve a threaded connection between the two third moving blocks 204 and the third lead screw 203, and to make the two third moving blocks 204 and the positioning plate 205 move up and down synchronously, thereby rotating the third lead screw 203, causing the third lead screw 203 to drive the positioning plate 205 to move up and down, so that the positioning plate 205 can move to the top of the third support mechanism 18 for preliminary positioning of the pipeline. At the same time, the positioning plate 205 can also move to the bottom of the third support mechanism 18 to ensure that the pipeline can move to the bottom of the welding torch 106.

[0059] Specifically, the two ends of the third optical bar are connected to the top of the fourth mounting bracket 201 and the third fixed plate 202, respectively, and the third optical bar passes through the two third moving blocks 204 in sequence, so that the two third moving blocks 204 move up and down along the third optical bar, thereby improving the stability of the movement of the two third moving blocks 204; the third drive mechanism is installed on the fourth mounting bracket 201, and the third drive mechanism is connected to the third lead screw 203, so that the third drive mechanism drives the third lead screw 203 to rotate, thereby providing power for rotating the third lead screw 203.

[0060] In the description of this invention, the term "a plurality of" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0061] In the description of this invention, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pipe welding apparatus characterized by comprising: The pipeline welding device comprises: a rotary welding mechanism; first lifting mechanisms, at least two of which are located on both sides of the rotary welding mechanism; support plates, two of which are located on both sides of the rotary welding mechanism and are connected with the at least two first lifting mechanisms respectively; moving mechanisms, two of which are installed on the two support plates respectively; first support mechanisms, two of which are connected with the two moving mechanisms respectively; clamping mechanisms, two of which are installed in the two first support mechanisms respectively; second support mechanisms, two of which are installed on the two support plates and are located on the side of the first support mechanisms close to the rotary welding mechanism; centering mechanisms, two of which are installed in the two second support mechanisms respectively; third support mechanisms, two of which are installed on the two support plates and are located on the side of the second support mechanisms close to the rotary welding mechanism; pressing mechanisms, two of which are installed on the two third support mechanisms respectively; lifting positioning mechanisms, two of which are located on both sides of the rotary welding mechanism and are located between the rotary welding mechanism and the support plates.

2. A pipe welding apparatus according to claim 1, wherein The rotary welding mechanism comprises: a first mounting frame, a first clearance hole is arranged in the first mounting frame; a slewing bearing, an inner ring of the slewing bearing is mounted on the first mounting frame; a rotary plate, a second clearance hole is arranged in the rotary plate, and the rotary plate is mounted on an outer ring of the slewing bearing; a first electric push rod, the first electric push rod is mounted on the rotary plate; a first connecting plate, the first connecting plate is connected with the first electric push rod; a welding torch, the welding torch is mounted on the first connecting plate; wherein the middle line of the first clearance hole, the middle line of the slewing bearing and the middle line of the second clearance hole coincide.

3. A pipe welding apparatus according to claim 1, wherein The moving mechanism comprises: first sliding seats, first sliding grooves are arranged in the first sliding seats, and at least two first sliding seats are installed at the bottom of the first support mechanism; first sliding rails, two first sliding rails are installed on the support plates and pass through the first sliding grooves of the at least two first sliding seats respectively; a first rack, the first rack is installed on the support plate and is located between the two first sliding rails; a first motor, the first motor is installed in the first support mechanism; a first gear, the first gear is connected with the first motor and engages with the first rack.

4. A pipe welding apparatus according to claim 3, wherein The first lifting mechanism comprises: first fixed plates, two first fixed plates are fixed on the ground, there is a space between the two first fixed plates, and the two first fixed plates are located below the support plates; a first lead screw, first external threads with opposite screw directions are symmetrically arranged on the outer wall of the first lead screw, and both ends of the first lead screw are rotatably connected with the two first fixed plates respectively; The first moving block is provided with a first inner thread with opposite screw directions, and two first moving blocks are symmetrically sleeved on the outer side of the first lead screw; The first inclined surface is arranged on the top of the first moving block, and two first inclined surfaces are oppositely arranged; The adjusting seat is provided with a second inclined surface at the bottom, and two adjusting seats are installed at the bottom of the supporting plate, and the second inclined surfaces of the two adjusting seats are respectively matched with the two first inclined surfaces; The first outer thread is matched with the first inner thread.

5. A pipe welding apparatus according to claim 4, wherein The first lifting mechanism further comprises: The first guide seat is a hollow cavity with an opening at the top, and two first guide seats are fixed on the ground; The first guide rod is embedded in the first guide seat, and the other end of the first guide rod is connected with the bottom of the supporting plate.

6. A pipe welding apparatus according to claim 1, wherein The clamping mechanism comprises: The adjusting mechanism is installed in the first supporting mechanism; The adjusting plate is located in the first supporting mechanism, and the adjusting mechanism is connected with the two adjusting plates to adjust the distance between the two adjusting plates; The second mounting frame is installed at the two ends of the adjusting plate; The second electric push rod is installed in the second mounting frame; The clamping seat is provided with a clamping groove, and the clamping seat is connected with the second electric push rod, and the clamping seat is located above the second mounting frame.

7. A pipe welding apparatus according to claim 6, wherein The adjusting mechanism comprises: The second motor is installed at the bottom of the first supporting mechanism; The second gear is located in the first supporting mechanism, and the second gear is connected with the second motor; The second rack is placed in the first supporting mechanism, and the two second racks are respectively engaged with the two sides of the second gear, and the two second racks are respectively connected with the two adjusting plates; The second sliding seat is provided with a second sliding groove, and at least two second sliding seats are installed at the bottom of the two adjusting plates; The second sliding rail is installed in the first supporting mechanism, and the two second sliding rails respectively pass through the second sliding groove of the at least two second sliding seats.

8. A pipe welding apparatus according to claim 7, wherein The centering mechanism comprises: The second lead screw is provided with a second outer thread with opposite screw directions on the outer wall, and the second lead screw is installed in the second supporting mechanism; The second moving block is provided with a second inner thread with opposite screw directions, and two second moving blocks are symmetrically sleeved on the outer side of the second lead screw; The guide roller is rotatably connected with the top of the second moving block; The second outer thread is matched with the second inner thread.

9. A pipe welding apparatus according to claim 8, wherein The pressing mechanism comprises: The third mounting frame is installed at the top of the third supporting mechanism; A third electric push rod is installed on the third mounting frame; A lifting plate is located in the third mounting frame, and the lifting plate is connected with the third electric push rod; Four second fixing plates are installed on the bottom of the lifting plate, and the four second fixing plates are oppositely arranged in pairs; A compression roller shaft is rotatably connected with two opposite second fixing plates at both ends thereof; Two second guide seats are installed on the third mounting frame, and the two second guide seats are located on both sides of the third electric push rod; Two second guide rods are connected with the lifting plate at one end thereof, and the other end of the two second guide rods passes through the third mounting frame and the second guide seat in sequence, respectively.

10. The pipe welding apparatus of claim 1, wherein, The lifting positioning mechanism comprises: A fourth mounting frame is L-shaped, and the fourth mounting frame is installed on the ground; A third fixing plate is installed in the fourth mounting frame; A third lead screw is provided with a third external thread on the outer wall thereof, one end of the third lead screw is rotatably connected with the top of the fourth mounting frame, and the other end of the third lead screw is rotatably connected with the third fixing plate; Two third moving blocks are provided with a third internal thread in the inside thereof, and the third moving blocks are sleeved on the outside of the third lead screw; A positioning plate is connected with the two third moving blocks at the same time, and the positioning plate is located on the side of the fourth mounting frame close to the support plate; The third external thread is matched with the third internal thread.

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