A galvanized pipe welding device

Abstract

The present application belongs to the technical field of welding, and particularly relates to a galvanized pipe welding device, which comprises a workbench and a welding torch arranged on the workbench, a spline shaft one and a spline shaft two are rotationally arranged on the workbench, two vertical plates are slidingly arranged on the workbench, a driving plate is rotationally arranged on the vertical plate, a C-shaped seat is fixedly arranged on the driving plate, and a plurality of clamping jaws are arrayed and slidingly arranged on the C-shaped seat; further comprising a cam, the cam is rotationally arranged in the C-shaped seat, and a synchronous belt is arranged between the plurality of cams. The galvanized pipe welding device, the clamping jaw clamps the galvanized pipe, the driving plate drives the C-shaped seat to rotate at a constant speed, ensures that the galvanized pipe rotates stably during the welding process, and the clamping jaw rotates synchronously with the galvanized pipe, so that surface scratches caused by relative sliding are avoided, the clamping jaws on the plurality of C-shaped seats are synchronously clamped, the pipe material axis is strictly aligned, the plurality of C-shaped seats rotate synchronously, so that the pipe material always maintains a consistent rotation speed and angle during the welding process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding, and particularly relates to a galvanized pipe welding device. BACKGROUND

[0002] The galvanized pipe is a kind of steel material with a layer of zinc plated on the surface of the steel pipe, and the main purpose is to prevent the steel pipe from rusting and prolong the service life through the protection of the zinc layer. It has the strength of the steel pipe and the corrosion resistance of the zinc layer, and is widely used in the fields of building water supply and drainage, gas transportation, heating pipeline, etc. It is also often used in agricultural greenhouse, scaffold erection and other scenes. According to the needs of the use site, the galvanized pipe needs to be welded.

[0003] At present, the galvanized pipe welding device mostly adopts a fixed roller clamping structure to fix the pipe. This traditional clamping method attempts to ensure the flexible rotation of the galvanized pipe while completing the welding operation, but there are obvious drawbacks in actual operation: when the clamping force applied by the roller is too large, the zinc layer on the surface of the galvanized pipe is easily scratched and damaged, which not only affects the appearance quality of the pipe, but also may weaken its corrosion resistance; and when the clamping force is insufficient, it is difficult to form a stable constraint on the pipe, resulting in problems such as shaking and deviation of the galvanized pipe during welding, which seriously affects the welding precision and weld quality, and therefore a galvanized pipe welding device is proposed. SUMMARY

[0004] The purpose of the present application is to provide a galvanized pipe welding device that can be fixed and clamped and rotate synchronously with the galvanized pipe.

[0005] The present application achieves the above-mentioned purposes through the following technical solutions:

[0006] A galvanized pipe welding device, comprising a workbench and a welding gun arranged on the workbench, a spline shaft one and a spline shaft two are rotatably arranged on the workbench, two vertical plates are slidably arranged on the workbench, a driving plate is rotatably arranged on the vertical plate, a C-shaped seat is fixedly arranged on the driving plate, and a plurality of clamping jaws are arrayed and slidably arranged on the C-shaped seat.

[0007] Further comprising:

[0008] A cam, a plurality of cams are rotatably arranged in the C-shaped seat, a synchronous belt is arranged between the plurality of cams, and the clamping jaws are driven to move reciprocally through the rotation of the cams;

[0009] A follow-up gear, the follow-up gear is rotatably arranged on the C-shaped seat, and a limiting mechanism is arranged between the follow-up gear and the cam;

[0010] A transmission gear, the transmission gear is rotatably arranged on the vertical plate, and the transmission gear is slidably arranged on the spline shaft one, the transmission gear drives the follow-up gear to rotate, and the limiting mechanism drives the cam to rotate.

[0011] A driving mechanism is arranged on the vertical plate and connected with the spline shaft II, and the driving plate is driven to rotate by the driving mechanism.

[0012] As a further optimization scheme of the present application, a sliding seat is fixedly arranged on the vertical plate, a track is fixedly arranged on the workbench, the sliding seat is slidingly arranged on the track, a C-shaped notch is arranged on the vertical plate, and an extension plate is arranged on the vertical plate.

[0013] As a further optimization scheme of the present application, a spline sleeve II is rotatably arranged on the extension plate, a transmission gear is fixedly arranged on the spline sleeve II, the spline sleeve II is slidingly arranged on the spline shaft I, and the spline shaft I penetrates through the vertical plate.

[0014] As a further optimization scheme of the present application, a panel is fixedly arranged on the C-shaped seat, a plurality of avoiding grooves are arrayed on the panel, the clamping jaw penetrates through the panel through the avoiding grooves, a plurality of horizontal shafts II are arrayed in the C-shaped seat, the horizontal shafts II are rotatably arranged in the C-shaped seat, the cam is rotatably connected with the C-shaped seat through the horizontal shafts II, a synchronous wheel is arranged on each of the horizontal shafts II, and adjacent synchronous wheels are connected through a synchronous belt.

[0015] As a further optimization scheme of the present application, a plurality of sliding grooves are arrayed on the panel, the clamping jaw is slidingly arranged on the sliding groove, a horizontal groove plate is arranged on the clamping jaw, a protruding rod is arranged on the cam, and the protruding rod is slidingly arranged in the horizontal groove plate.

[0016] As a further optimization scheme of the present application, a horizontal shaft I is rotatably arranged on the C-shaped seat, a follow-up gear is fixedly arranged on the horizontal shaft I, and the follow-up gear is movably connected with the transmission gear.

[0017] As a further optimization scheme of the present application, the limiting mechanism comprises a worm, the worm is rotatably arranged in the C-shaped seat, one of the horizontal shafts II is provided with a worm wheel, the worm is engaged with the worm wheel, a vertical shaft is rotatably arranged on the C-shaped seat, the worm and the vertical shaft are both provided with synchronous gears, the two synchronous gears are engaged with each other, the horizontal shaft I and the vertical shaft are both provided with bevel gears, and the two bevel gears are engaged with each other.

[0018] As a further optimization scheme of the present application, a rotating ring is arranged on the driving plate, the driving plate is rotatably arranged on the vertical plate through the rotating ring, the driving plate is fixedly connected with the C-shaped seat through the rotating ring, the rotating ring is in a C structure, and tooth protrusions are uniformly arranged on the edges of the driving plate.

[0019] As a further optimization of the present invention, the driving mechanism includes a spline sleeve 1, which is rotatably mounted on the vertical plate and slidably mounted on the spline shaft 2. A drive gear is mounted on the spline sleeve 1, and two connecting gears are rotatably mounted on the vertical plate. The two connecting gears are symmetrically arranged on both sides of the drive gear. The drive gear meshes with the connecting gears, and the connecting gears mesh with the toothed protrusions on the drive plate.

[0020] As a further optimization of the present invention, side plates are fixedly provided on both sides of the worktable, and servo motor one and servo motor two are provided on the side plates. The output ends of servo motor one and servo motor two are fixedly connected to spline shaft one and spline shaft two, respectively, and both ends of spline shaft one and spline shaft two are rotatably connected to the side plates.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. Unlike existing technologies, in actual use, the initial alignment of the C-shaped seat with the notch of the upright plate facilitates the rapid placement of the galvanized pipe. Servo motor one drives spline shaft one, which, via transmission gears, follower gears, and a limiting mechanism, drives multiple cams to rotate synchronously, ensuring precise clamping of the galvanized pipe by the grippers and achieving automated, efficient clamping. Servo motor two, linked with spline shaft two and the drive mechanism, drives the drive plate to rotate the C-shaped seat at a uniform speed, ensuring stable rotation of the galvanized pipe during welding. This allows the welding torch to form a uniform and continuous weld seam, and the grippers rotate synchronously with the galvanized pipe, avoiding surface scratches caused by relative sliding, ensuring the integrity of the pipe's appearance, and guaranteeing a uniform and continuous weld seam, significantly improving welding quality.

[0023] 2. Unlike existing technologies, in actual use, the spline shaft one is connected to the transmission gear, which allows the jaws on multiple C-shaped seats to clamp synchronously, ensuring strict alignment of the pipe axis and eliminating welding errors caused by pipe misalignment at the source. At the same time, the spline shaft two is connected to the spline sleeve one, ensuring that multiple C-shaped seats rotate synchronously. In this way, the pipe always maintains a consistent rotation speed and angle during the welding process, allowing the welding torch to act precisely on the joint, significantly improving welding accuracy and stability, and effectively avoiding welding defects caused by asynchronous rotation in traditional equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the vertical plate connection structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the vertical plate structure of the present invention;

[0027] Figure 4 This is the present invention. Figure 3Schematic diagram of the split structure;

[0028] Figure 5 This is a schematic diagram of the C-shaped seat structure of the present invention;

[0029] Figure 6 This is the present invention. Figure 5 Enlarged structural diagram at point A in the middle;

[0030] Figure 7 This is a schematic diagram of the disassembled C-shaped seat structure of the present invention;

[0031] Figure 8 This is the present invention. Figure 7 Enlarged structural diagram at point B;

[0032] Figure 9 This is a partial cross-sectional view of the C-shaped seat structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the gripper structure of the present invention.

[0034] In the diagram: 1. Workbench; 2. Vertical plate; 21. Sliding seat; 22. Rail; 23. Extension plate; 3. Splined shaft one; 31. Splined shaft two; 4. C-shaped seat; 41. Panel; 411. Clearance groove; 5. Clamping jaw; 51. Slide groove; 52. Horizontal groove plate; 6. Drive plate; 61. Rotating ring; 62. Tooth protrusion; 7. Drive mechanism; 71. Splined sleeve one; 72. Drive gear; 73. Connecting gear; 8. 1. Synchronous belt; 81. Synchronous pulley; 9. Cam; 91. Protruding rod; 10. Limiting mechanism; 101. Worm gear; 102. Worm wheel; 103. Synchronous gear; 104. Vertical shaft; 105. Bevel gear; 11. Follower gear; 111. Horizontal shaft one; 12. Transmission gear; 121. Spline sleeve two; 13. Horizontal shaft two; 14. Servo motor one; 15. Servo motor two; 16. Side plate; 17. Welding torch. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0036] Example 1: As Figure 1 - Figure 10As shown, a galvanized pipe welding device includes a workbench 1 and a welding torch 17 mounted on the workbench 1. Side plates 16 are fixedly mounted on both sides of the workbench 1. A servo motor 14 and a servo motor 15 are mounted on the side plates 16. The output ends of the servo motors 14 and 15 are fixedly connected to a spline shaft 3 and a spline shaft 31, respectively. Both ends of the spline shafts 3 and 31 are rotatably connected to the side plates 16. Two vertical plates 2 are slidably mounted on the workbench 1. Rotatably mounted on the vertical plates 2 are... The device includes a drive plate 6, on which a C-shaped seat 4 is fixedly mounted. Multiple grippers 5 slide in an array on the C-shaped seat 4. Multiple cams 9 are rotatably mounted inside the C-shaped seat 4, each with a convex rod 91. A synchronous belt 8 connects the multiple cams 9, driving the grippers 5 to reciprocate through the rotation of the cams 9. In operation, servo motors 14 and 15 serve as power sources, controlling spline shafts 3 and 31 respectively, providing stable and precisely adjustable power to the entire device. The two vertical plates 2 allow the device to operate on two galvanized pipes simultaneously. Combined with the C-shaped seat 4, grippers 5, and cams 9, automated clamping is achieved, significantly improving work efficiency compared to manual operation. This also ensures consistent and accurate clamping, reducing errors caused by human factors.

[0037] A sliding seat 21 is fixedly installed at the bottom of the upright plate 2, and a track 22 is fixedly installed on the worktable 1. The sliding seat 21 is slidably mounted on the track 22. Through the cooperation of the sliding seat 21 and the track 22, the position of the upright plate 2 can be flexibly adjusted, facilitating welding operations on galvanized pipes of different lengths and with different welding requirements, thus enhancing the versatility and applicability of the device. A C-shaped notch is provided on the upright plate 2, and an extension plate 23 is provided on the upright plate 2. The C-shaped notch on the upright plate 2 facilitates the placement of galvanized pipes, simplifying the material feeding process, while the extension plate 23 provides installation space for the subsequent transmission structure, ensuring that the layout of each component is compact and does not interfere with each other, making the device structure more reasonable and its operation more stable.

[0038] A spline sleeve 121 is rotatably mounted on the extension plate 23, and a transmission gear 12 is fixedly mounted on the spline sleeve 121. The spline sleeve 121 is slidably mounted on the spline shaft 3, which passes through the vertical plate 2. A horizontal shaft 111 is rotatably mounted on the C-shaped seat 4, and a follower gear 11 is fixedly mounted on the horizontal shaft 111. The follower gear 11 is movably connected to the transmission gear 12. The spline shaft 3 transmits power to the transmission gear 12 through the spline sleeve 121. The transmission gear 12 meshes with the follower gear 11, driving the follower gear 11 to rotate. In this way, the combination of the transmission gear 12, the follower gear 11, the spline shaft 3, and the spline sleeve 121 forms a stable and reliable power transmission system. This design can accurately transmit the power of the spline shaft 3 to the follower gear 11, thereby driving the subsequent structure, ensuring the stability and accuracy of power transmission, avoiding power loss and transmission errors, making the action of the gripper 5 more precise, and improving the accuracy and reliability of galvanized pipe clamping.

[0039] A panel 41 is fixedly mounted on the C-shaped seat 4. The panel 41 has an array of clearance grooves 411. A gripper 5 passes through the clearance grooves 411 and penetrates the panel 41. An array of sliding grooves 51 are also provided on the panel 41, and the gripper 5 is slidably mounted on the sliding grooves 51. A transverse groove plate 52 is provided on the gripper 5, and a protruding rod 91 is embedded and slidably mounted in the transverse groove plate 52. The protruding rod 91 on the cam 9 slides within the transverse groove plate 52 of the gripper 5, pushing the gripper 5 to perform reciprocating linear motion on the sliding groove 51 of the C-shaped seat 4. Multiple horizontal shafts 13 are arrayed within the C-shaped seat 4. These horizontal shafts 13 are rotatably mounted within the C-shaped seat 4. Cams 9 are rotatably connected to the C-shaped seat 4 via the horizontal shafts 13. Each horizontal shaft 13 is equipped with a synchronous pulley 81, and adjacent synchronous pulleys 81 are connected by a synchronous belt 8. The clearance groove 411 and sliding groove 51 on the panel 41 provide guidance and space for the movement of the gripper 5, ensuring that the gripper 5 can slide smoothly along a predetermined trajectory, thus improving the stability and reliability of the gripper 5's movement. The cooperation of the cams 9, horizontal shafts 13, synchronous pulleys 81, and synchronous belt 8 enables the synchronous rotation of multiple cams 9, thereby allowing multiple grippers 5 to move synchronously and evenly clamp the galvanized pipe. This avoids deformation or positional displacement of the galvanized pipe caused by uneven clamping force, ensuring the accuracy and stability of the galvanized pipe clamping, and also contributing to improved welding quality.

[0040] A limiting mechanism 10 is provided between the follower gear 11 and the cam 9 directly below the notch of the C-shaped seat 4. The limiting mechanism 10 includes a worm 101, which is rotatably mounted in the C-shaped seat 4. A worm wheel 102 is mounted on the horizontal shaft 13 directly below the notch of the C-shaped seat 4, and the worm 101 meshes with the worm wheel 102. A vertical shaft 104 is rotatably mounted on the C-shaped seat 4, and synchronous gears 103 are mounted on both the worm 101 and the vertical shaft 104, and the two synchronous gears 103 mesh with each other. A bevel gear 105 is mounted on both the horizontal shaft 111 and the vertical shaft 104, and the two bevel gears 105 mesh with each other. Gears 105 mesh with each other, and the follower gear 11 drives the vertical shaft 104 to rotate via the horizontal shaft 111. The vertical shaft 104 meshes with the synchronous gear 103 on the worm 101, causing the worm 101 to rotate and mesh with the worm wheel 102, thereby driving one of the cams 9 to rotate. In this way, through the transmission of components such as the worm 101, worm wheel 102, synchronous gear 103, and bevel gear 105, the power of the follower gear 11 is accurately transmitted to the cam 9, ensuring that the cam 9 rotates according to a predetermined trajectory and pattern, thus making the action of the gripper 5 more precise and reliable. Furthermore, the self-locking characteristic of the transmission direction between the worm 101 and the worm wheel 102 can fix the position of the gripper 5. At the same time, the vertical shaft 104 positions the follower gear 11 directly below the notch of the C-shaped seat 4. This precise transmission and limiting mechanism effectively avoids the randomness and uncertainty of the gripper 5's action, ensuring the stability and consistency of the galvanized pipe clamping process, and improving the working accuracy and reliability of the entire device.

[0041] A drive mechanism 7 is installed on the upright plate 2, which is connected to the second splined shaft 31. The drive mechanism 7 drives the drive plate 6 to rotate. The drive mechanism 7 includes a first splined sleeve 71, which is rotatably mounted on the upright plate 2 and slidably mounted on the second splined shaft 31. A drive gear 72 is fixedly mounted on the first splined sleeve 71. Two connecting gears 73 are rotatably mounted on the upright plate 2, symmetrically arranged on both sides of the drive gear 72. The drive gear 72 meshes with the connecting gears 73, which drive the drive plate 6 to move. The drive mechanism 7 effectively transmits the power of the second splined shaft 31 to the drive plate 6 through the first splined sleeve 71, the drive gear 72, and the connecting gears 73, driving the C-shaped seat 4 to rotate. The symmetrically arranged connecting gears 73 ensure uninterrupted driving force, allowing the C-shaped seat 4 to rotate continuously. This ensures that the galvanized pipe can rotate at a stable speed during welding, providing a guarantee for high-quality welding.

[0042] A rotating ring 61 is provided on the drive plate 6. The drive plate 6 is rotatably mounted on the vertical plate 2 via the rotating ring 61. The drive plate 6 is fixedly connected to the C-shaped seat 4 via the rotating ring 61. The rotating ring 61 has a C-shaped structure. The drive plate 6 has evenly spaced toothed protrusions 62 on its edge. The toothed protrusions 62 mesh with the connecting gear 73, which can accurately transmit power and make the C-shaped seat 4 drive the galvanized pipe to rotate at a uniform speed. This ensures the stability and uniformity of the rotation of the galvanized pipe during the welding process, which is conducive to the formation of a uniform and continuous weld by the welding torch 17 and improves the welding quality. This connection method has a compact structure, is easy to install and disassemble, and facilitates the maintenance and repair of the equipment.

[0043] It should be noted that in the initial working state of the galvanized pipe welding device, the C-shaped seat 4 is precisely aligned with the C-shaped notch on the vertical plate 2, providing a convenient channel for placing the galvanized pipe. The operator can smoothly insert the galvanized pipe along the notch, and then start the servo motor 14, whose output power drives the spline shaft 3 to start rotating. The spline shaft 3 transmits power to the transmission gear 12 through the spline sleeve 121. The transmission gear 12 meshes with the follower gear 11, driving the follower gear 11 to rotate. The follower gear 11 drives the vertical shaft 104 to rotate through the horizontal shaft 111. The vertical shaft 104 meshes with the synchronous gear 103 on the worm 101, causing the worm 101 to rotate and mesh with the worm wheel 102, thereby driving one of the cams 9 to start rotating. Multiple cams 9 operate synchronously via a timing belt 8 and a timing pulley 81. The protrusions 91 on the cams 9 slide within the transverse groove plate 52 of the gripper 5, pushing the gripper 5 to reciprocate linearly on the sliding groove 51 of the C-shaped seat 4, firmly clamping the galvanized pipe placed therein. Two C-shaped seats 4 work together to fix two galvanized pipes respectively. The position of the C-shaped seats 4 is adjusted by sliding the vertical plate 2 to achieve precise docking of the galvanized pipes.

[0044] After the galvanized pipe is joined and clamped, the servo motor 15 is started, which drives the spline shaft 31 to rotate. The spline shaft 31 drives the drive gear 72 to rotate through the spline sleeve 71. The drive gear 72 meshes with the connecting gears 73 on both sides, and the connecting gears 73 mesh with the toothed protrusions 62 on the edge of the drive plate 6, thereby driving the drive plate 6 to rotate. The drive plate 6 drives the C-shaped seat 4 to rotate synchronously through the rotating ring 61, so that the clamped galvanized pipe rotates at a uniform speed. At the same time, the welding torch 17 is started, and the welding torch 17 performs welding operations on the joint of the rotating galvanized pipe. After the C-shaped seat 4 rotates one revolution, the welding of the galvanized pipe is completed. At this time, the follower gear 11 meshes with the transmission gear 12 again, and the C-shaped seat 4 is aligned with the C-shaped notch on the vertical plate 2 again. Then, by rotating the transmission gear 12 in the opposite direction, the clamp 5 is released, and the welded galvanized pipe is directly removed from the notch of the C-shaped seat 4.

[0045] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A galvanized pipe welding apparatus, comprising a workbench (1) and a welding torch (17) disposed on the workbench (1), characterized in that: The worktable (1) is rotatably provided with a spline shaft one (3) and a spline shaft two (31). Two vertical plates (2) are slidably provided on the worktable (1). A drive plate (6) is rotatably provided on the vertical plate (2). A C-shaped seat (4) is fixedly provided on the drive plate (6). Multiple grippers (5) are slidably arranged in an array on the C-shaped seat (4). It also includes: Cam (9), multiple cams (9) are provided and rotatably disposed in C-shaped seat (4), and a synchronous belt (8) is provided between the multiple cams (9). The cams (9) rotate to drive the gripper (5) to reciprocate. Follower gear (11), which is rotatably mounted on C-shaped seat (4), and a limiting mechanism (10) is provided between the follower gear (11) and the cam (9). The transmission gear (12) is rotatably mounted on the vertical plate (2) and slidably mounted on the spline shaft (3). The transmission gear (12) drives the follower gear (11) to rotate, and then the cam (9) is rotated by the limiting mechanism (10). A drive mechanism (7) is mounted on the vertical plate (2) and is connected to the spline shaft (31). The drive mechanism (7) drives the drive plate (6) to rotate. A panel (41) is fixedly installed on the C-shaped seat (4). An array of clearance grooves (411) are provided on the panel (41). The gripper (5) passes through the panel (41) through the clearance grooves (411). A plurality of horizontal shafts (13) are arranged in an array inside the C-shaped seat (4). The horizontal shafts (13) are rotatably installed inside the C-shaped seat (4). The cam (9) is rotatably connected to the C-shaped seat (4) through the horizontal shafts (13). Each horizontal shaft (13) is provided with a synchronous pulley (81). Adjacent synchronous pulleys (81) are connected by a synchronous belt (8). The panel (41) is provided with an array of sliding grooves (51), the gripper (5) is slidably disposed on the sliding grooves (51), the gripper (5) is provided with a transverse groove plate (52), the cam (9) is provided with a protruding rod (91), and the protruding rod (91) is embedded and slidably disposed in the transverse groove plate (52); A horizontal shaft (111) is rotatably mounted on the C-shaped seat (4), and a follower gear (11) is fixedly mounted on the horizontal shaft (111). The follower gear (11) is movably connected to the transmission gear (12). The limiting mechanism (10) includes a worm gear (101), which is rotatably mounted in a C-shaped seat (4). A worm wheel (102) is mounted on one of the horizontal shafts (13), and the worm gear (101) meshes with the worm wheel (102). A vertical shaft (104) is rotatably mounted on the C-shaped seat (4). A synchronous gear (103) is mounted on both the worm gear (101) and the vertical shaft (104), and the two synchronous gears (103) mesh with each other. A bevel gear (105) is mounted on both the horizontal shaft (111) and the vertical shaft (104), and the two bevel gears (105) mesh with each other.

2. The galvanized pipe welding device according to claim 1, characterized in that: A sliding seat (21) is fixedly installed on the upright plate (2), a track (22) is fixedly installed on the workbench (1), the sliding seat (21) is slidably installed on the track (22), a C-shaped notch is opened on the upright plate (2), and an extension plate (23) is installed on the upright plate (2).

3. The galvanized pipe welding device according to claim 2, characterized in that: The extension plate (23) is rotatably provided with a spline sleeve two (121), and the transmission gear (12) is fixedly provided on the spline sleeve two (121). The spline sleeve two (121) is slidably provided on the spline shaft one (3), and the spline shaft one (3) passes through the vertical plate (2).

4. The galvanized pipe welding device according to claim 1, characterized in that: The drive plate (6) is provided with a rotating ring (61). The drive plate (6) is rotatably mounted on the upright plate (2) through the rotating ring (61). The drive plate (6) is fixedly connected to the C-shaped seat (4) through the rotating ring (61). The rotating ring (61) has a C structure. The drive plate (6) has evenly toothed protrusions (62) on its edge.

5. A galvanized pipe welding device according to claim 4, characterized in that: The drive mechanism (7) includes a spline sleeve (71), which is rotatably mounted on the vertical plate (2) and slidably mounted on the spline shaft (31). A drive gear (72) is mounted on the spline sleeve (71), and two connecting gears (73) are rotatably mounted on the vertical plate (2). The two connecting gears (73) are symmetrically mounted on both sides of the drive gear (72). The drive gear (72) meshes with the connecting gears (73), and the connecting gears (73) mesh with the toothed protrusions (62) on the drive plate (6).

6. The galvanized pipe welding device according to claim 1, characterized in that: The workbench (1) is fixedly provided with side plates (16) on both sides. Servo motor one (14) and servo motor two (15) are provided on the side plates (16). The output ends of servo motor one (14) and servo motor two (15) are fixedly connected to spline shaft one (3) and spline shaft two (31) respectively. Both ends of spline shaft one (3) and spline shaft two (31) are rotatably connected to the side plates (16).

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