Reel pipe joint welding device and using method thereof

Abstract

The invention relates to the technical field of reel pipe machining, in particular to a reel pipe joint welding device and a using method thereof. The device comprises a base, a portal frame, a feeding mechanism, a position switching mechanism and a reel pipe bearing assembly, the portal frame is fixed to the base, and the position switching mechanism comprises a first driving assembly, a transverse shaft and a rotating disc. Through collaborative design of the position switching mechanism and the feeding mechanism, the rotating disc drives the circumferentially distributed reel pipe bearing assemblies to be circularly switched to the feeding station, the welding station and the discharging station, the feeding mechanism can automatically complete conveying, calibration and sleeving of reel pipes, manual feeding and positioning of the reel pipes one by one are not needed, and the production efficiency is improved. The limitation of manual operation on continuous production is thoroughly eliminated, and the overall machining efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of pipe rolling technology, specifically to a pipe rolling joint welding device and its usage method. Background Technology

[0002] In the tube rolling production process, the conventional method is to first bend the thin plate into a circle, then bring the two sides together and weld them into a cylindrical shape. Currently, this process relies heavily on manual welding, which is not only inefficient but also results in uneven welding quality. Therefore, the application of automatic welding equipment has become an industry demand, with straight seam welding machines being the mainstream automatic welding equipment.

[0003] However, straight seam welding machines still have significant limitations in practical use: the rolled pipes must be manually moved one by one to the designated processing station, and the joints of the rolled pipes must be precisely aligned and positioned manually. This manual operation mode is labor-intensive, makes it difficult to achieve continuous material feeding and positioning operations, seriously restricts the improvement of overall production efficiency, and cannot meet the needs of large-scale, high-efficiency rolled pipe processing.

[0004] Therefore, we propose a pipe joint welding device and its usage method. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a pipe joint welding device and its usage method.

[0006] The technical solution adopted by this invention is as follows: This invention provides a pipe joint welding device and its usage method, comprising a base, a gantry frame, a feeding mechanism, a position switching mechanism, and a pipe receiving assembly. The gantry frame is fixed on the base. The position switching mechanism includes a drive assembly, a horizontal shaft, and a rotating disk. The horizontal shaft is horizontally fixed inside the gantry frame. The rotating disk is rotatably sleeved on the horizontal shaft via bearings. The drive assembly is fixedly installed on one side of the gantry frame. The rotating disk is connected to the drive assembly via transmission. The pipe receiving assembly is circumferentially distributed on one side of the rotating disk. The horizontal shaft is also provided with a lifting mechanism and a pushing mechanism. The lifting mechanism is located below the pipe receiving assembly, and the pushing mechanism is located on one side of the lifting mechanism and connected to the pipe receiving assembly. The feeding mechanism is located on the base and on one side of the pipe receiving assembly.

[0007] Furthermore, the tube receiving assembly includes a hollow rod, a positioning unit, and an elastic unit. One end of the hollow rod is fixedly connected to a rotating shaft, which is rotatably connected to a rotating disk via a bearing. A linkage rod is slidably provided inside the hollow rod, and a vertical rod is fixedly connected to one end of the linkage rod outside the hollow rod. The positioning unit passes through the top of the hollow rod and is connected to the linkage rod. The elastic unit is fixedly connected to the bottom of the central control rod and is connected to the vertical rod. The tube receiving assembly also includes a fixing disk fixedly sleeved on the hollow rod, and tube fixing blocks are symmetrically fixed to one side wall of the fixing disk.

[0008] Furthermore, the positioning unit includes a positioning cylinder that extends through the top of the hollow rod. A sliding block is slidably fitted inside the positioning cylinder. A positioning pin is fixedly connected to the top of the sliding block and slides through the top of the positioning cylinder. A connecting rod is fixedly connected to the bottom of the sliding block. An opening for the connecting rod to pass through is provided at the bottom of the positioning cylinder. A spring is slidably sleeved on the connecting rod and abuts against the bottom wall of the positioning cylinder. A roller is rotatably mounted on the bottom end of the connecting rod. Grooves are spaced apart on the linkage rod. One inner wall of each groove is inclined. An inclined cavity is formed inside the inclined surface. A connection port communicating with the inclined cavity is formed on the inclined surface. The connecting rod moves through the connection port. The roller is located inside the inclined cavity and rolls in contact with the top wall of the inclined cavity.

[0009] Furthermore, the elastic unit includes a pressure cylinder and an extrusion block. The pressure cylinder is fixedly mounted at the bottom of the central control rod, and the extrusion block is slidably adapted to the inside of the pressure cylinder. A push rod is fixedly connected to one side of the extrusion block. The push rod slides through the inner wall of one side of the pressure cylinder and is then fixedly connected to a vertical rod. A spring is positioned between the extrusion block and the inner wall of the other side of the pressure cylinder.

[0010] Furthermore, the lifting mechanism includes a cylinder, which is fixedly mounted on a horizontal shaft. A horizontal plate is fixedly connected to the output end of the cylinder. Vertical plates are symmetrically fixed to the top of the horizontal plate, and a horizontal rod slides through the vertical plates. A fixing bolt is provided at the top of the vertical plates, and the fixing bolt abuts against the horizontal rod. A lifting rod is fixedly connected to one end of the horizontal rod, and the lifting rod is located between the vertical plates. By adjusting the position of the horizontal rod on the vertical plates, the lifting requirements of different specifications of coiled tubes can be adapted. The fixing bolt is used to lock the horizontal rod to ensure the stability of the lifting process.

[0011] Furthermore, the pushing mechanism includes a second cylinder and a column. The column is fixedly mounted on the horizontal axis and located on one side of the hollow rod. The second cylinder is fixedly mounted on the column, and a pushing disc is fixedly connected to the output end of the second cylinder. The pushing disc contacts the vertical rod. When the second cylinder is activated, it pushes the vertical rod to move through the pushing disc, thereby causing the linkage rod to slide within the hollow rod, providing power for the movement of the positioning unit.

[0012] Furthermore, the top of the column is provided with a bending section, and a tube fixing block is symmetrically fixed to one side wall of the bending section. The gap between the tube fixing block and the hollow rod is the thickness of the tube. The tube fixing block is used to limit the two ends of the tube. When the tube rises, it is blocked by the tube fixing block.

[0013] Furthermore, the feeding mechanism includes a moving block, a cylinder three, and a lifting frame. The moving block is slidably mounted on the base via a slide rail. The cylinder three is fixedly mounted on the moving block. The lifting frame is fixedly mounted on the output end of the cylinder three. Two sets of rotating rollers are rotatably mounted on the lifting frame. A second driving assembly for driving the rotating rollers is mounted on the lifting frame. A lead screw nut is fixedly mounted on the moving block. A ball screw is threaded onto the lead screw nut. A third driving motor is fixedly mounted on the base. One end of the ball screw is connected to the output end of the third driving motor. The other end of the ball screw is rotatably connected to the side wall of the gantry frame via a bearing. A friction sleeve is slidably fitted onto the outside of the rotating roller. An elongated groove is formed on the surface of the rotating roller. A limiting block is slidably mounted in the elongated groove. The inner wall of the friction sleeve is fixedly connected to the limiting block. A third spring is connected between the limiting block and the inner wall of one side of the elongated groove. The second driving assembly includes a second driving motor, which is fixedly mounted on one side of the lifting frame and drives the two sets of rotating rollers to rotate via a synchronous belt drive structure.

[0014] Furthermore, a fixed plate is fixedly provided on the top of the lifting frame, and an installation rod slides through the fixed plate. An n-shaped frame is fixed to one end of the installation rod, and a driven roller is rotatably installed inside the n-shaped frame, positioned above the rotating roller. A limit plate is fixed to the other end of the installation rod. An n-shaped plate is fixed to the side wall of the fixed plate away from the driven roller, and a push-button switch is provided inside the n-shaped plate. The limit plate is located inside the n-shaped plate and close to the push-button switch. A spring four is slidably sleeved on the installation rod, and the spring four abuts against the n-shaped frame and the fixed plate. A guide rod is also fixedly provided on the n-shaped frame, and the guide rod slides through the fixed plate. When the coiled tube is being conveyed, the pressure change of the coiled tube on the driven roller causes the limit plate to trigger the push-button switch, achieving automatic stopping of the feeding and improving the degree of automation.

[0015] Furthermore, the drive assembly includes a drive motor, which is fixedly installed on one side of the gantry frame. A gear ring is fixedly provided on one side wall of the rotating disk, and a gear is fixedly connected to the output end of the drive motor, which meshes with the gear ring.

[0016] A method for using a pipe joint welding device includes the following steps: S1. Feeding and Positioning Calibration: The tube to be processed is placed on the feeding mechanism and moves toward the tube receiving assembly so that the hollow rod passes through the tube. If the tube joint is not aligned with the positioning pin, the positioning pin blocks the tube movement, triggers the press switch, and drives the second drive motor to rotate and calibrate the tube until the joint is aligned with the positioning pin. The positioning pin is inserted into the joint to complete the positioning, and the tube and the fixed plate abut against each other to achieve stable connection.

[0017] S2, Station Switching: The drive motor drives the rotary table to rotate (90° at a time) through gear-ring transmission, transferring the receiving component with the sleeved coil to the welding station. At the same time, the next set of receiving components moves to the feeding station to achieve continuous feeding. Due to the center of gravity design, the receiving component maintains a stable posture during the transfer, and the positioning pin always faces upward.

[0018] S3. Joint Closure and Welding: After the rolled tube reaches the welding station, the lifting mechanism lifts the rolled tube upward, and the rolled tube is limited by the fixed block to generate a closing squeezing force; the pushing mechanism drives the linkage rod to slide, causing the positioning pin to retract and disengage from the joint, and the rolled tube joint is closed; then the laser welding equipment welds the closed joint.

[0019] S4. Unloading Cycle: After welding is completed, each mechanism is reset, the rotary table transfers the finished coiled tube to the unloading station, and after the finished product is extracted, the device repeats the above process to achieve cyclic processing.

[0020] The beneficial effects achieved by the present invention using the above structure are as follows: 1. This invention, through the coordinated design of the position switching mechanism and the feeding mechanism, allows the rotating disk to drive the circumferentially distributed coiled tube receiving components to cycle through the feeding, welding, and unloading stations. The feeding mechanism can automatically complete the conveying, calibration, and splicing of the coiled tubes, eliminating the need for manual feeding and positioning of each coiled tube individually. This completely eliminates the limitations of manual operation on continuous production and significantly improves overall processing efficiency.

[0021] 2. This invention utilizes a feeding mechanism in conjunction with a tube receiving assembly: the feeding mechanism, driven by a third drive motor and a ball screw, smoothly feeds the tube by moving blocks; a third cylinder adjusts the height of the lifting frame to match the tube specifications; a rotating roller, in conjunction with a friction sleeve and a third spring, clamps the tube; the hollow rod of the tube receiving assembly inserts into the tube, and a fixed plate limits its axial position. When the seam is misaligned, a positioning pin blocks the tube, triggering the driven roller, fourth spring, and a push-button switch of the feeding mechanism to rotate and calibrate the tube until the positioning pin inserts into the seam for precise positioning. The entire feeding and positioning process is automated, requiring no manual intervention, thus reducing labor intensity and avoiding human positioning errors.

[0022] 3. This invention utilizes a lifting mechanism, a pushing mechanism, and a coiled tube receiving assembly in conjunction: After the coiled tube arrives at the welding station, cylinder one of the lifting mechanism drives the lifting rod to lift the bottom of the coiled tube, which, in conjunction with the coiled tube fixing block on the column and the fixing plate, limits the two ends of the coiled tube, converting the lifting force into a joint closing pressure; simultaneously, cylinder two of the pushing mechanism pushes the vertical rod to drive the linkage rod to slide, and through the cooperation of the roller and the inclined inner cavity, drives the positioning pins to retract sequentially, with the positioning pin closest to the pushing plate retracting last, ensuring that the joint gradually closes tightly from one end to the other, providing a flat and fitting joint surface for welding and ensuring welding quality. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention; Figure 3 This is a three-dimensional structural diagram of the coiled pipe support assembly; Figure 4 A three-dimensional structural diagram of the tube receiving assembly from another perspective; Figure 5 This is a schematic diagram of the connection structure between the linkage rod and the positioning unit; Figure 6 A three-dimensional structural diagram of the positioning unit; Figure 7 This is a cross-sectional view of the positioning unit. Figure 8 This is a cross-sectional view of an elastic element; Figure 9 A three-dimensional structural diagram of the feeding mechanism; Figure 10 A three-dimensional structural diagram of the feeding mechanism from another perspective; Figure 11 This is a partial sectional view of the feeding mechanism; Figure 12 for Figure 11 Enlarged view of point A in the image; Figure 13 A three-dimensional structural diagram of the lifting mechanism, the pushing mechanism, and the horizontal axis; Figure 14 A three-dimensional structural diagram of the lifting mechanism, the pushing mechanism, and the horizontal axis from another perspective.

[0024] The components include: 1. Base; 2. Gantry frame; 3. Feeding mechanism; 31. Moving block; 32. Cylinder three; 33. Lifting frame; 331. Fixed plate; 332. Mounting rod; 333. N-shaped frame; 334. Driven roller; 335. Limiting plate; 336. N-shaped plate; 337. Press switch; 338. Spring four; 339. Guide rod; 34. Slide rail; 35. Rotating roller; 351. Friction sleeve; 352. Long groove; 353. Limiting block; 354. Spring three; 36. Drive assembly two; 361. Drive motor two; 362. Synchronous belt drive structure; 37. Screw nut; 38. Ball screw; 39. Drive motor three; 4. Position switching mechanism; 41. Drive assembly one; 411. Drive motor one; 412. Gear ring; 413. Gear; 42. Horizontal shaft; 43. Rotary disk. 5. Tube Receiving Assembly, 51. Hollow Rod, 52. Positioning Unit, 521. Positioning Cylinder, 522. Sliding Block, 523. Positioning Pin, 524. Connecting Rod, 525. Opening, 526. Spring 1, 527. Roller, 53. Elastic Unit, 531. Pressure Cylinder, 532. Extrusion Block, 533. Push Rod, 534. Spring 2, 54. Rotating Shaft, 55. Linkage Rod, 551. Groove, 552. Inclined Surface, 553. Inclined Inner Cavity, 554. Connecting Port, 56. Vertical Rod, 57. Fixing Plate, 58. Tube Fixing Block, 6. Lifting Mechanism, 61. Cylinder 1, 62. Horizontal Plate, 63. Vertical Plate, 64. Horizontal Rod, 65. Fixing Bolt, 66. Lifting Rod, 7. Pushing Mechanism, 71. Cylinder 2, 72. Column, 721. Bending Part, 73. Pushing Plate. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0027] like Figures 1-14As shown, the present invention discloses a pipe joint welding device, comprising a base 1, a gantry frame 2, a feeding mechanism 3, a position switching mechanism 4, and a pipe receiving assembly 5. The gantry frame 2 is fixed on the base 1. The position switching mechanism 4 includes a drive assembly 41, a horizontal shaft 42, and a rotating disk 43. The horizontal shaft 42 is horizontally fixed inside the gantry frame 2. The rotating disk 43 is rotatably sleeved on the horizontal shaft 42 via bearings. The drive assembly 41 is fixedly installed on one side of the gantry frame 2. The rotating disk 43 is connected to the drive assembly 41 in a transmission manner. The pipe receiving assembly 5 is circumferentially distributed on one side of the rotating disk 43. The horizontal shaft 42 is also provided with a lifting mechanism 6 and a pushing mechanism 7. The lifting mechanism 6 is located below the pipe receiving assembly 5, and the pushing mechanism 7 is located on one side of the lifting mechanism 6 and connected to the pipe receiving assembly 5. The feeding mechanism 3 is located on the base 1 and on one side of the pipe receiving assembly 5.

[0028] The gantry frame 2 is vertically fixed to the top of the base 1, forming a frame-like support structure through bolt fastening. This structure not only provides a high-altitude mounting platform for the horizontal shaft 42, drive assembly 41, and lifting mechanism 6, but also reserves installation space for laser welding equipment, optimizing the overall layout. The feeding mechanism 3, installed on the top of the base 1 and located on the feeding side of the tube receiving assembly 5, automatically and precisely feeds and conveys the tubes to be processed. It also drives the tubes to rotate smoothly, completing the precise connection between the tubes and the hollow rod 51, laying the foundation for subsequent processing. The position switching mechanism 4, composed of drive assembly 41, horizontal shaft 42, and rotary disk 43, is the core component for realizing station flow. The horizontal shaft 42 is fixed horizontally inside the gantry frame 2. The rotating disk 43 is rotatably connected to the horizontal shaft 42 via bearings, providing stable rotational support for the rotating disk 43. The drive assembly 41 is fixed to one side of the gantry frame 2 and is connected to the rotating disk 43 for transmission. It can drive the rotating disk 43 to rotate precisely, thereby driving the circumferentially distributed coiled pipe receiving assembly 5 to switch to different work positions such as feeding, welding, and unloading, ensuring continuous operation. The coiled pipe receiving assembly 5 is evenly distributed around the circumference of the rotating disk 43 and is the direct bearing and positioning component of the coiled pipe. Its function is to receive the coiled pipe conveyed by the feeding mechanism 3, align it with the joint of the coiled pipe through its own positioning structure, and keep the joint of the coiled pipe facing upward during the rotation of the rotating disk 43 to ensure the accuracy of subsequent joint closure and welding. The lifting mechanism 6 is fixed on the horizontal shaft 42 and located directly below the coiled pipe receiving assembly 5. Its main function is to lift the bottom of the coiled pipe upward during the welding work position, providing power for joint closure. Pushing mechanism 7: Located on the horizontal axis 42 and on one side of the lifting mechanism 6, its output end is linked with the tube receiving assembly 5, which can provide horizontal driving force to drive the positioning structure of the tube receiving assembly 5 to move, realize the extension and retraction of the positioning component, and complete the positioning and release of the tube joint.

[0029] like Figures 1-14As shown, the tube receiving assembly 5 includes a hollow rod 51, a positioning unit 52, and an elastic unit 53. One end of the hollow rod 51 is fixedly connected to a rotating shaft 54, which is rotatably connected to a rotating disk 43 via a bearing. A linkage rod 55 is slidably provided inside the hollow rod 51. A vertical rod 56 is fixedly connected to one end of the linkage rod 55 outside the hollow rod 51. The positioning unit 52 passes through the top of the hollow rod 51 and is connected to the linkage rod 55. The elastic unit 53 is fixedly connected to the bottom of the central control rod and is connected to the vertical rod 56. The tube receiving assembly 5 also includes a fixing disk 57 fixedly sleeved on the hollow rod 51. Tube fixing blocks 58 are symmetrically fixed to one side wall of the fixing disk 57. The positioning unit 52 includes a positioning cylinder 521, which extends through the top of the hollow rod 51. A sliding block 522 is slidably fitted inside the positioning cylinder 521. A positioning pin 523 is fixedly connected to the top of the sliding block 522 and slides through the top of the positioning cylinder 521. A connecting rod 524 is fixedly connected to the bottom of the sliding block 522. An opening 525 for the connecting rod 524 to pass through is passed through the bottom of the positioning cylinder 521. A spring 526 is slidably sleeved on the connecting rod 524, and the spring 526 abuts against the sliding block 522 and the positioning cylinder 521. Between the bottom walls, a roller 527 is rotatably mounted on the bottom end of the connecting rod 524. Grooves 551 are spaced apart on the linkage rod 55. One inner wall of the groove 551 is an inclined surface 552. An inclined inner cavity 553 with the same inclination direction as the inclined surface is opened inside the inclined surface 552. A connecting port 554 communicating with the inclined inner cavity 553 is opened on the inclined surface 552. The connecting rod 524 moves through the connecting port 554. The roller 527 is located in the inclined inner cavity 553 and rolls in contact with the top wall of the inclined inner cavity 553.

[0030] The elastic unit 53 includes a pressure cylinder 531 and a pressing block 532. The pressure cylinder 531 is fixedly installed at the bottom of the central control rod. The pressing block 532 is slidably adapted to the inside of the pressure cylinder 531. A push rod 533 is fixedly connected to one side of the pressing block 532. The push rod 533 slides through the inner wall of one side of the pressure cylinder 531 and is fixedly connected to the vertical rod 56. A spring 534 abuts against the inner wall of the other side of the pressing block 532 and the pressure cylinder 531.

[0031] The working principle of the coiled tube receiving assembly 5: Through the coordinated action of the hollow rod 51, the positioning unit 52, and the elastic unit 53, the coiled tube is received and the joint is aligned. Simultaneously, the positioning unit 52 is released in conjunction with an external mechanism. Coiled tube connection and bearing: The hollow rod 51 serves as the core bearing carrier of the coiled tube. When the feeding mechanism 3 pushes the coiled tube to be processed into the assembly, the hollow rod 51 penetrates into the inside of the coiled tube, and one end of the coiled tube ultimately contacts the fixed plate 57 to achieve axial limitation. Simultaneously, the hollow rod 51 is rotatably connected to the rotating plate 43 via the rotating shaft 54. When the rotating plate 43 drives the station to rotate, it can autonomously maintain its stable posture thanks to its center of gravity design, ensuring that the coiled tube joint is always in the preset position during subsequent processing. Precise joint positioning: The positioning unit 52 passes through the top of the hollow rod 51, and its action is driven by the linkage rod 55. During the process of inserting the coiled tube into the hollow rod 51, if the joint of the coiled tube is not aligned with the positioning pin 523 of the positioning unit 52, the positioning pin 523 will block the coiled tube from moving further, triggering the calibration mechanism of the feeding mechanism 3. After the coiled tube rotates until the joint is aligned with the positioning pin 523, the coiled tube is pushed into the hollow rod 51 under the action of elastic force, and the positioning pin 523 is inserted into the joint to achieve the positioning of the coiled tube and ensure the accuracy of subsequent joint closure. Positioning release and elastic reset: When the coiled tube flows to the welding station, the pushing mechanism 7 provides horizontal driving force, pushing the vertical rod 56 to drive the linkage rod 55 to slide inside the hollow rod 51. The linkage rod 55 drives the positioning pin 523 of the positioning unit 52 to retract through the transmission structure (such as the roller 527 cooperating with the inclined inner cavity 553), disengaging it from the coiled tube joint and leaving space for joint closure. At this time, the elastic unit 53 (such as the spring 534 in the pressure cylinder 531) is compressed and stores elastic potential energy; when the welding is completed, the push mechanism 7 is reset, the elastic unit 53 releases elastic potential energy, pushes the vertical rod 56 and the linkage rod 55 to slide in the opposite direction, and drives the positioning pin 523 to extend again, in preparation for the subsequent tube cutting and new tube positioning.

[0032] like Figures 1-14 As shown, the lifting mechanism 6 includes a cylinder 61, which is fixedly mounted on a horizontal shaft 42. A horizontal plate 62 is fixedly connected to the output end of the cylinder 61. Vertical plates 63 are symmetrically fixed to the top of the horizontal plate 62. A horizontal rod 64 slides through the vertical plate 63. A fixing bolt 65 is provided at the top of the vertical plate 63, and the fixing bolt 65 abuts against the horizontal rod 64. A lifting rod 66 is fixedly connected to one end of the horizontal rod 64, and the lifting rod 66 is located between the vertical plates 63. By adjusting the position of the horizontal rod 64 on the vertical plate 63, the lifting requirements of different specifications of coiled tubes can be adapted. The fixing bolt 65 is used to lock the horizontal rod 64 to ensure the stability of the lifting process. The pushing mechanism 7 includes a second cylinder 71 and a column 72. The column 72 is fixedly mounted on the horizontal shaft 42 and located on one side of the hollow rod 51. The second cylinder 71 is fixedly mounted on the column 72, and a pushing disk 73 is fixedly connected to the output end of the second cylinder 71. The pushing disk 73 is in contact with the vertical rod 56. When the second cylinder 71 is activated, it pushes the vertical rod 56 to move through the pushing disk 73, thereby causing the linkage rod 55 to slide within the hollow rod 51, providing power for the movement of the positioning unit 52. The column 72 has a bending section 721 at its top. A tube fixing block 58 is symmetrically fixed to one side wall of the bending section 721. The gap between the tube fixing block 58 and the hollow rod 51 is equal to the thickness of the tube. The tube fixing block 58 is used to limit the two ends of the tube. When the tube rises, it is blocked by the tube fixing block 58.

[0033] The working principle of the lifting mechanism 6: Through the cooperation of cylinder drive and mechanical structure, it realizes the lifting of coiled tubes of different specifications, providing extrusion force for the closure of the coiled tube joints. For coiled tubes of different diameters, first loosen the fixing bolts 65 at the top of the vertical plate 63, slide the horizontal bar 64 along the through hole of the vertical plate 63, and adjust the distance between the two sets of lifting rods 66. The distance between the two sets of lifting rods 66 should be smaller than the diameter of the coiled tube, so that the lifting rods 66 can correspond to the bottom sides of the coiled tube to be processed. After the adaptation is completed, tighten the fixing bolts 65, and lock the horizontal bar 64 by the contact between the bolts and the horizontal bar 64 to fix the position of the horizontal bar 64, prevent the horizontal bar 64 from shifting during the lifting process, and ensure the lifting stability. Power-driven lifting: When the coiled tube receiving assembly 5 moves the coiled tube to the welding station, cylinder 61 is activated, its output end extends and pushes the horizontal plate 62 upward. Simultaneously, the horizontal plate 62 drives the symmetrically positioned vertical plates 63, horizontal rods 64, and lifting rods 66 at the top to rise as a whole. The lifting rods 66, as the direct force-applying component, precisely support both sides of the bottom of the coiled tube, achieving vertical upward lifting. Joint closure: When the lifting rods 66 lift the coiled tube upward, both ends are axially limited by the coiled tube fixing blocks 58, preventing further upward movement. At this time, the continuous lifting force of the lifting rods 66 is converted into radial compressive force on the coiled tube, causing it to close inward along the joint, ensuring a tight fit on both sides of the joint and providing a smooth and tight joint surface for subsequent welding operations, thus guaranteeing welding quality. Reset preparation cycle: After welding is completed, the output end of cylinder 61 retracts, driving the horizontal plate 62, vertical plate 63, horizontal rod 64 and lifting rod 66 to move down and reset synchronously, returning to the initial position, preparing for the lifting operation of the next coiled pipe, and ensuring the continuous cycle operation of the device.

[0034] like Figures 1-14As shown, the feeding mechanism 3 includes a moving block 31, a cylinder 32, and a lifting frame 33. The moving block 31 is slidably mounted on the base 1 via a slide rail 34. The cylinder 32 is fixedly mounted on the moving block 31. The lifting frame 33 is fixedly mounted on the output end of the cylinder 32. Two sets of rotating rollers 35 are rotatably mounted on the lifting frame 33. A second drive assembly 36 for driving the rotating rollers 35 is mounted on the lifting frame 33. A lead screw nut 37 is fixedly mounted on the moving block 31. A ball screw nut 38 is threaded onto the lead screw nut 37. A third drive motor 39 is fixedly mounted on the base 1. One end of the ball screw 38 is connected to the third drive motor 39. The output end of the transmission is connected, and the other end of the ball screw 38 is rotatably connected to the side wall of the gantry frame 2 through a bearing. A friction sleeve 351 is slidably sleeved on the outside of the rotating roller 35. A long groove 352 is opened on the surface of the rotating roller 35. A limiting block 353 is slidably provided in the long groove 352. The inner wall of the friction sleeve 351 is fixedly connected to the limiting block 353. A spring 354 is connected between the limiting block 353 and the inner wall of one side of the long groove 352. The second drive assembly 36 includes a second drive motor 361. The second drive motor 361 is fixedly installed on one side of the lifting frame 33 and drives the two sets of rotating rollers 35 to rotate through a synchronous belt transmission structure 362. A fixed plate 331 is fixedly provided on the top of the lifting frame 33. An installation rod 332 slides through the fixed plate 331. An n-shaped frame 333 is fixed to one end of the installation rod 332. A driven roller 334 is rotatably installed inside the n-shaped frame 333. The driven roller 334 is located above the rotating roller 35. A limit plate 335 is fixedly connected to the other end of the installation rod 332. An n-shaped plate 336 is fixed on the side wall of the fixed plate 331 away from the driven roller 334. A push switch 337 is provided inside the n-shaped plate 336. The limit plate 335 is located inside the n-shaped plate 336 and close to the push switch 337. A spring 338 is slidably sleeved on the installation rod 332. The spring 338 abuts between the n-shaped frame 333 and the fixed plate 331. A guide rod 339 is also fixed on the n-shaped frame 333. The guide rod 339 slides through the fixed plate 331. When the tube is being conveyed, the pressure change of the tube on the driven roller 334 causes the limit plate 335 to trigger the push switch 337, thereby automatically stopping the feeding and improving the level of automation.

[0035] The working principle of the feeding mechanism 3: Through power drive, elastic adaptation and sensor linkage, it realizes stable feeding of coiled tubes of different specifications, precise alignment of joints, and automated control of the conveying process. Cylinder 32, as the height adjustment power source, can drive the output end to extend and retract according to the diameter specification of the coiled tube to be processed, thereby driving the lifting frame 33 to move up and down as a whole, adjusting the height of the coiled tube, so that the upper side of the inner wall of the coiled tube is in contact with the hollow rod 51. After the drive motor 39 starts, it drives the ball screw 38 to rotate through the transmission structure. The ball screw 38 and the screw nut 37 at the bottom of the moving block 31 form a threaded engagement, converting the rotational motion into horizontal linear motion, driving the moving block 31 to slide smoothly along the slide rail 34 on the base 1; the moving block 31 simultaneously drives cylinder 32, lifting frame 33, rotating roller 35 and the clamped coiled tube to move towards the hollow rod 51 of the coiled tube receiving assembly 5, preparing for the coiled tube to be sleeved. In the initial stage of tube conveying, if the tube joint is not aligned with the positioning pin 523 on the hollow rod 51, the positioning pin 523 will block the tube from moving further. At this time, under the pushing force of the moving block 31, the tube applies pressure to the driven roller 334, compressing the spring 338 and driving the n-shaped frame, mounting rod 332, and limit plate 335 to move towards the press switch 337, ultimately triggering the press switch 337. The press switch 337 sends a signal to the controller, which immediately shuts off the drive motor 39, stopping the horizontal conveying. At the same time, the drive motor 361 is started, driving the two sets of rotating rollers 35 to rotate synchronously via the synchronous belt. The rotating rollers 35 generate friction with the tube through the friction sleeve 351 on their surface, driving the tube to rotate slowly. When the tube rotates until the seam aligns with the positioning pin 523, the obstruction of the positioning pin 523 on the tube disappears. Under the restoring force of spring three 354 (pushing the friction sleeve 351) and spring four 338 (pushing the driven roller 334), the tube automatically moves towards the hollow rod 51, and the positioning pin 523 inserts into the seam to complete the positioning. At this time, the pressure of the tube on the driven roller 334 decreases, spring four 338 resets, the limit plate 335 separates from the push switch 337, the push switch 337 sends a reset signal, the controller shuts off drive motor two 361, the rotating roller 35 stops rotating, and the controller restarts drive motor three 39. The moving block 31 continues to drive the coiled tube towards the hollow rod 51 until one end of the coiled tube contacts the fixed plate 57 of the coiled tube receiving assembly 5, completing the connection of the coiled tube on the hollow rod 51. At this time, the photoelectric sensor (not shown in the figure) installed on the base 1 senses the moving block 31. At this time, the motor 3 stops rotating, the cylinder 32 retracts, and the coiled tube separates from the rotating roller 35. After the rotating plate 43 takes the coiled tube away, the drive motor 39 rotates in the opposite direction, driving the moving block 31 and the feeding mechanism 3 to reset as a whole, returning to the initial feeding position. The cylinder 32 extends and resets, ready to receive the next coiled tube, realizing continuous feeding cycle.

[0036] like Figures 1-14As shown, the drive assembly 41 includes a drive motor 411, which is fixedly installed on one side of the gantry frame 2. A gear ring 412 is fixedly provided on one side wall of the rotating disk 43. A gear 413 is fixedly connected to the output end of the drive motor 411, and the gear 413 meshes with the gear ring 412.

[0037] In practical use, the tube to be welded is first placed between the two sets of rotating rollers 35, with one end of the tube in contact with the driven roller 334. The controller controls the rotation angle of the drive motor 411, so that each rotation of the drive motor 411 drives the rotating disk 43 to rotate 90 degrees, so that a hollow rod 51 is at the bottom. Then, the controller controls the start of the drive motor 39, which drives the moving block 31 to move, thereby moving the tube to be welded toward the hollow rod 51. At this time, the hollow rod 51 will pass into the tube to be welded. When the positioning pin 523 on the hollow rod 51 is not aligned with the straight gap on the tube to be welded... At this time, the positioning pin 523 will block the movement of the coiled tube to be welded. The coiled tube to be welded will then begin to press against the driven roller 334, compressing the spring 338. Simultaneously, the friction sleeve 351 will also move, compressing the spring 354, which in turn causes the limit plate 335 to press against the push switch 337. The push switch 337 will then transmit a signal to the controller, which will control the drive motor 39 to shut off. At this time, the moving block 31 will no longer move. At the same time, the controller will control the drive motor 361 to start, which, through the synchronous belt transmission, will drive the two sets of rotating rollers 35 to rotate synchronously, thereby driving the friction sleeve 351 to rotate, and thus driving the coiled tube to be welded. When the tube to be welded rotates, the positioning pin 523 will align with the straight gap on the tube. At this time, under the rebound force of spring three 354 and spring four 338, the tube to be welded will move towards the hollow rod 51, so that the positioning pin 523 enters the straight gap on the tube. At this time, the limit plate 335 separates from the press switch 337, and the press switch 337 resets. At this time, the controller controls the drive motor two 361 to turn off, and the rotating roller 35 stops rotating. At the same time, the controller controls the drive motor three 39 to start again, thereby driving the moving block 31 to move. A photoelectric sensor is installed on the base 1. (Not shown in the figure) When the photoelectric sensor detects the moving block 31, the controller controls the drive motor 39 to shut down. At this time, one end of the coiled tube to be welded contacts the fixed plate 57. At this time, the cylinder 32 retracts, causing the coiled tube to separate from the rotating roller 35. At this time, the controller controls the drive motor 411 to start, driving the rotating plate 43 to rotate 90 degrees again, so that the next hollow rod 51 is ready to receive the coiled tube to be welded. Then the drive motor 39 rotates in the opposite direction, driving the moving block 31 and the feeding mechanism 3 to reset as a whole, returning to the initial feeding position. The cylinder 32 extends and resets, ready to receive the next coiled tube, realizing a continuous feeding cycle. When the hollow rod 51 moves the tube to be welded, the center of gravity of the entire tube receiving assembly 5 is located below the axis of the hollow rod 51, and the center of gravity of the tube to be welded is also located below the center of gravity of the entire tube receiving assembly 5 after the tube is sleeved on the hollow rod 51. Thus, when the rotating disk 43 rotates, the hollow rod 51 will rotate on its own, maintaining its posture, so that the positioning pin 523 is always located at the top. When the rotating disk 43 rotates the tube to be welded to its highest position, cylinder 61 is activated, causing the lifting rod 66 to rise. The lifting rod 66 supports the bottom sides of the tube to be welded and rises. Due to the obstruction of the tube fixing block 58, the tube to be welded cannot move upward. At this time, the tube to be welded will generate a force to close towards the straight gap. At this time, the two sides of the straight gap on the tube to be welded are in contact with the positioning pin 523. Then, cylinder 71 is driven to move the pushing disk 73, which in turn moves the vertical rod 56 and the linkage rod 55, causing the roller 527 to roll in the inclined inner cavity 553. This causes the connecting rod 524, the sliding block 522, and the positioning pin 523 to move downward, causing the positioning pin 523 to disengage from the straight gap and close the straight gap. It should be noted that the height of the positioning pin 523 on the side closest to the pushing disk 73 is... The angle must be higher than other positioning pins 523. When positioning pin 523 retracts into positioning cylinder 521, the positioning pin 523 closest to the push plate 73 will retract into positioning cylinder 521 last. The purpose of this setting is that the straight gap and the place where positioning pin 523 first separates will close first. The place that closes first will remain stationary under the obstruction of the tube fixing block 58. Then the straight gap and the place where the last positioning pin 523 separates will close again. This ensures that the closed part of the straight gap corresponds to the positioning pin 523. Then, the laser welding equipment (not shown in the figure, as it is existing technology and will not be described) installed above the gantry 2 moves in a straight line to weld the closed part of the straight gap. After welding, the second drive cylinder 71 and the first cylinder 61 retract. Then, the first drive motor 411 is started to drive the rotating plate 43 to rotate 90 degrees, so that the welded tube can be rotated to one side, thereby allowing the welded tube to be pulled out from the hollow rod 51.

[0038] 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.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipe joint welding device, characterized in that: The system includes a base (1), a gantry frame (2), a feeding mechanism (3), a position switching mechanism (4), and a tube receiving assembly (5). The gantry frame (2) is fixed on the base (1). The position switching mechanism (4) includes a drive assembly (41), a horizontal shaft (42), and a rotating disk (43). The horizontal shaft (42) is horizontally fixed inside the gantry frame (2). The rotating disk (43) is rotatably sleeved on the horizontal shaft (42) through a bearing. The drive assembly (41) is fixedly installed on the gantry frame (2). On the side, the rotating disk (43) is connected to the drive assembly (41) for transmission. The tube receiving assembly (5) is circumferentially distributed on one side of the rotating disk (43). The horizontal shaft (42) is also provided with a lifting mechanism (6) and a pushing mechanism (7). The lifting mechanism (6) is located below the tube receiving assembly (5), and the pushing mechanism (7) is located on one side of the lifting mechanism (6) and abuts against the tube receiving assembly (5). The feeding mechanism (3) is located on the base (1) and is located on one side of the tube receiving assembly (5).

2. A pipe joint welding device according to claim 1, characterized in that: The tube receiving assembly (5) includes a hollow rod (51), a positioning unit (52), and an elastic unit (53). One end of the hollow rod (51) is fixedly connected to a rotating shaft (54), which is rotatably connected to a rotating disk (43) through a bearing. A linkage rod (55) is slidably provided inside the hollow rod (51). A vertical rod (56) is fixedly connected to one end of the linkage rod (55) outside the hollow rod (51). The positioning unit (52) passes through the top of the hollow rod (51) and is connected to the linkage rod (55). The elastic unit (53) is fixedly connected to the bottom of the hollow rod (51) and is connected to the vertical rod (56). The tube receiving assembly (5) also includes a fixing disk (57) fixedly sleeved on the hollow rod (51). Tube fixing blocks (58) are symmetrically fixed to one side wall of the fixing disk (57).

3. A pipe joint welding device according to claim 2, characterized in that: The positioning unit (52) includes a positioning cylinder (521) that passes through the top of the hollow rod (51). A sliding block (522) is slidably fitted inside the positioning cylinder (521). A positioning pin (523) is fixedly connected to the top of the sliding block (522), and the positioning pin (523) slides through the top of the positioning cylinder (521). A connecting rod (524) is fixedly connected to the bottom of the sliding block (522). An opening (525) is passed through the bottom of the positioning cylinder (521) for the connecting rod (524) to pass through. A spring (526) is slidably sleeved on the connecting rod (524), and the spring (526) abuts against the sliding block (522). Between the bottom wall of the positioning cylinder (521), a roller (527) is rotatably installed on the bottom end of the connecting rod (524). Grooves (551) are distributed at intervals on the linkage rod (55). The inner wall of one side of the groove (551) is an inclined surface (552). An inclined inner cavity (553) is opened inside the inclined surface (552). A connection port (554) communicating with the inclined inner cavity (553) is opened on the inclined surface (552). The connecting rod (524) moves through the connection port (554). The roller (527) is located inside the inclined inner cavity (553), and the roller (527) rolls in contact with the top wall of the inclined inner cavity (553).

4. A pipe joint welding device according to claim 3, characterized in that: The elastic unit (53) includes a pressure cylinder (531) and an extrusion block (532). The pressure cylinder (531) is fixedly installed at the bottom of the hollow rod (51). The extrusion block (532) is slidably adapted to the inside of the pressure cylinder (531). A push rod (533) is fixedly connected to one side of the extrusion block (532). The push rod (533) slides through the inner wall of one side of the pressure cylinder (531) and is fixedly connected to the vertical rod (56). A spring (534) abuts between the extrusion block (532) and the inner wall of the other side of the pressure cylinder (531).

5. A pipe joint welding device according to claim 1, characterized in that: The lifting mechanism (6) includes a cylinder (61), which is fixedly installed on the horizontal shaft (42). A horizontal plate (62) is fixedly connected to the output end of the cylinder (61). A vertical plate (63) is symmetrically fixed to the top of the horizontal plate (62). A horizontal rod (64) slides through the vertical plate (63). A fixing bolt (65) is provided at the top of the vertical plate (63). The fixing bolt (65) abuts against the horizontal rod (64). A lifting rod (66) is fixedly connected to one end of the horizontal rod (64). The lifting rod (66) is located between the vertical plates (63).

6. A pipe joint welding device according to claim 2, characterized in that: The pushing mechanism (7) includes a second cylinder (71) and a column (72). The column (72) is fixed on the horizontal axis (42) and located on one side of the hollow rod (51). The second cylinder (71) is fixed on the column (72), and a pushing disk (73) is fixedly connected to the output end of the second cylinder (71). The pushing disk (73) is in contact with the vertical rod (56). The top of the column (72) is provided with a bending part (721). A tube fixing block (58) is also symmetrically fixed on one side wall of the bending part (721). The gap between the tube fixing block (58) and the hollow rod (51) is the thickness of the tube.

7. The pipe joint welding device according to claim 6, characterized in that: The feeding mechanism (3) includes a moving block (31), a cylinder (32) and a lifting frame (33). The moving block (31) is slidably mounted on the base (1) via a slide rail (34). The cylinder (32) is fixedly mounted on the moving block (31). The lifting frame (33) is fixedly mounted on the output end of the cylinder (32). Two sets of rotating rollers (35) are rotatably mounted on the lifting frame (33). A second driving component (36) for driving the rotating rollers (35) to rotate is mounted on the lifting frame (33). A friction sleeve (351) is slidably sleeved on the outside of the rotating rollers (35). A long groove (352) is opened on the surface of the rotating rollers (35). A limiting block (353) is slidably mounted in the long groove (352). The inner wall of the friction sleeve (351) is fixedly connected to the limiting block (353). A spring (354) is connected between the limiting block (353) and the inner wall of one side of the long groove (352).

8. A pipe joint welding device according to claim 7, characterized in that: The top of the lifting frame (33) is fixedly provided with a fixed plate (331), and an installation rod (332) slides through the fixed plate (331). One end of the installation rod (332) is fixed with an n-shaped frame (333), and a driven roller (334) is rotatably installed inside the n-shaped frame (333). The driven roller (334) is located above the rotating roller (35). The other end of the installation rod (332) is fixedly connected with a limit plate (335). An n-shaped plate (336) is fixed on the side wall of the fixed plate (331) away from the driven roller (334). A push switch (337) is provided inside the n-shaped plate (336). The limit plate (335) is located inside the n-shaped plate (336) and close to the push switch (337). A spring four (338) is slidably sleeved on the installation rod (332). The spring four (338) abuts between the n-shaped frame (333) and the fixed plate (331).

9. A method of using the pipe joint welding device according to claim 8, characterized in that, Includes the following steps: S1. Feeding and positioning calibration: The tube to be processed is placed on the feeding mechanism (3) and moves toward the tube receiving component (5) so that the hollow rod (51) is inserted into the tube; if the tube joint is not aligned with the positioning pin (523), the positioning pin (523) blocks the tube from moving and triggers the press switch (337), driving component two (36) to rotate and calibrate the tube until the joint is aligned with the positioning pin (523), the positioning pin (523) is inserted into the joint to complete the positioning, and the tube and the fixed plate (57) abut against each other to achieve stable connection; S2, Station switching: Drive component one (41) drives the rotary disk (43) to rotate. The rotation angle is 90° in a single rotation. The receiving component with the sleeved coil is transferred to the welding station. At the same time, the next set of receiving components is moved to the feeding station to realize continuous feeding. Due to the center of gravity design, the receiving component maintains a stable posture during the transfer. The positioning pin (523) always faces upward. S3. Seam Closure and Welding: After the rolled tube reaches the welding station, the lifting mechanism (6) lifts the rolled tube upward, and the rolled tube is limited by the rolled tube fixing block (58) to generate a closing squeezing force; the pushing mechanism (7) drives the linkage rod (55) to slide, so that the positioning pin (523) retracts and disengages from the seam, and the rolled tube seam is closed; then the laser welding equipment welds the closed seam. S4. Unloading cycle: After welding is completed, each mechanism is reset, and the rotating disk (43) transfers the finished coiled tube to the unloading station. After the finished product is extracted, the device repeats the above process to achieve cyclic processing.

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