Automatic welding equipment for liquefied gas cylinder

Abstract

The application belongs to the technical field of steel bottle welding equipment, in particular to a liquefied gas steel bottle automatic welding equipment, which comprises a bottom plate, two groups of first clamping assemblies are arranged on the upper end of the bottom plate, each first clamping assembly comprises two first arc-shaped plates, the two first arc-shaped plates can be close to each other, the two groups of first clamping assemblies can slide on the upper end of the bottom plate, a second clamping assembly is arranged on one side of each first clamping assembly, the second clamping assembly comprises a first ring, a disc is rotatably arranged in the first ring, a plurality of cylindrical blocks are slidably arranged on one side of the disc, the first ring can slide on the upper end of the bottom plate, a plurality of welding heads are arranged on one side of the upper end of the bottom plate, the upper tank body and the lower tank body are driven to be close to each other, then the cylindrical blocks are driven to clamp the shroud and the base respectively and move close to the tank body, then the tank body is driven to rotate, and the welding heads weld each weld, thereby improving the work efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of cylinder welding equipment, specifically an automatic welding equipment for liquefied gas cylinders. Background Technology

[0002] Liquefied petroleum gas (LPG) cylinders are Class II pressure vessels used to store flammable and explosive chemicals. They are widely used in urban and rural residents' lives, as well as in small restaurants and eateries in towns and cities. The production quality of LPG cylinders undoubtedly plays a crucial role in the safety of people's lives and property. A cylinder generally consists of a cylinder body, a protective cover, and a base. The base supports the cylinder body, ensuring its stable placement, while the protective cover protects the valves and other internal components. During cylinder manufacturing, the cylinder body is welded first, followed by the welding of the protective cover and base.

[0003] A patent with publication number CN112440054B discloses a welding system and welding method for steel cylinders. Compared with the manual welding operation in the prior art, which requires a complex mechanical mechanism to fix the steel cylinder body, the present invention has a simple and reliable structure, automated welding processing, and welding operation after clamping and fixing, resulting in high welding quality.

[0004] In the aforementioned prior art, when welding steel cylinders, the cylinder body needs to be assembled and welded first, and then the protective cover and base are welded to the upper and lower ends of the cylinder body to complete the welding of the steel cylinder. The prior art generally welds the cylinder body first, and then transfers the welded cylinder body to the next processing point to weld the protective cover and base. The welding steps are numerous, the work efficiency is low, and the cylinder body may shake during the transfer process, which may cause the weld to crack.

[0005] Therefore, the present invention provides an automatic welding equipment for liquefied gas cylinders. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The automatic welding equipment for liquefied petroleum gas cylinders of the present invention includes a base plate. The upper end of the base plate is provided with two sets of first clamping components. The first clamping components include two first arc-shaped plates that can approach each other. The two sets of first clamping components can slide on the upper end of the base plate. A second clamping component is provided on one side of each of the two sets of first clamping components. The second clamping component includes a first ring. A disk is rotatably arranged inside the first ring. A plurality of cylindrical blocks are slidably arranged on one side of the disk. The first ring can slide on the upper end of the base plate. A plurality of welding heads are provided on one side of the upper end of the base plate.

[0008] Preferably, a first rectangular strip slides through both sides of the first arc-shaped plate, the two first rectangular strips are at an angle, and a rotating wheel is rotatably provided at the end of the first rectangular strip.

[0009] Preferably, the end of the first rectangular bar away from the rotating wheel is rotatably connected to a connecting rod. The end of the connecting rod away from the first rectangular bar is rotatably connected to one side of the first arc-shaped plate via a pin. The end of the connecting rod away from the first rectangular bar is provided with a plurality of teeth, and the teeth respectively mesh with gears. Two gears are rotatably connected to one side of the first arc-shaped plate via pins, and the two gears mesh with each other.

[0010] Preferably, a second rectangular block is fixedly connected to each of the upper two sides of the base plate, and a second cylindrical rod is fixedly connected between the two second rectangular blocks. A second arc plate is fixedly connected to the outer side of the first arc plate through the first rectangular plate, and a first rectangular block is fixedly connected to the outer side of the second arc plate. The first rectangular block located at the lower end can slide on the outer side of the second cylindrical rod. A first L-shaped block is fixedly connected to one side of the first rectangular block located at the lower end, and a second L-shaped block is fixedly connected to one side of the first rectangular block located at the upper end. The second L-shaped block can slide inside the upper end of the first L-shaped block.

[0011] Preferably, the second clamping assembly further includes a circular plate rotatably connected to the center of the disk, the inner edge of the circular plate is provided with a plurality of arc-shaped holes, the cylindrical block can slide inside the arc-shaped holes, a second ring is fixedly connected to the end of the cylindrical block away from the circular plate, and a first rectangular groove is provided on the side of the disk near the circular plate corresponding to the position of the cylindrical block, the end of the cylindrical block can slide in the first rectangular groove.

[0012] Preferably, a second rectangular plate is fixedly connected to the lower end of the first ring, a second cylinder is slidably disposed in the middle of the two discs, and a third rectangular plate is fixedly connected to the end of the second cylinder, and the third rectangular plate and the second rectangular plate can slide on the outside of the second cylindrical rod respectively.

[0013] Preferably, the two second cylinders are fixed to the first cylindrical rod inside by springs, and the first cylindrical rod can slide inside the second cylinders.

[0014] Preferably, a first cylinder is passed through and fixed in the middle of the two opposing gears, and a cylindrical strip is slidably provided in the middle of the first cylinder. A second rectangular groove is provided at the upper end of the cylindrical strip, and the first cylinder can slide in the second rectangular groove by means of a slider.

[0015] Preferably, the lower cylindrical strip is fixedly connected to both ends of a second rectangular strip, and the upper cylindrical strip is fixedly connected to both ends of a third rectangular strip, wherein the third rectangular strip can slide inside the second rectangular strip.

[0016] Preferably, a third cylinder is slidably connected to one end of the welding head, and a fourth rectangular strip is fixedly connected to the end of the third cylinder away from the welding head. The lower ends of the fourth rectangular strips can slide on a slide rail, and the slide rail is fixedly connected to the upper end of the base plate.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The automatic welding equipment for liquefied petroleum gas cylinders of the present invention uses two sets of arc-shaped plates to move closer together, thereby driving the rotating wheels to move closer together and clamping the upper and lower cylinders respectively. Then, the upper and lower cylinders are driven to move closer together, and then cylindrical blocks are driven to slide on one side of the disc to clamp the protective cover and the base respectively. Then, the protective cover and the base are moved closer to the cylinder, and then the disc is driven to drive the cylindrical blocks to slide in the middle of the first ring, causing the protective cover and the base to rotate, and at the same time, the upper and lower cylinders are rotated. Simultaneously, the welding head is driven to weld each weld seam. The cylinder body, protective cover and base of the cylinder can be welded at the same time, reducing the number of working steps and improving the work efficiency.

[0019] 2. The automatic welding equipment for liquefied gas cylinders of the present invention drives two sets of gears to rotate simultaneously by driving a cylindrical bar. The gears drive the rotating wheel at the end of the first rectangular bar to slide inside the first arc plate through a connecting rod, which can clamp the middle tank. The sliding range of the first rectangular bar can be adjusted according to the tanks of different diameters, and it can be used to clamp tanks of different diameters. At the same time, when the upper tank and the lower tank are driven to move closer to each other, the gear can slide on the outside of the cylindrical bar through the first cylinder without affecting the rotation of the gear. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0022] Figure 2 This is a structural diagram of a gas cylinder;

[0023] Figure 3 This is a schematic diagram showing the location of the weld joint;

[0024] Figure 4 This is a schematic diagram of the first clamping component structure;

[0025] Figure 5 This is a diagram showing the position of the rotating wheel;

[0026] Figure 6 This is a schematic diagram showing the position of the first ring;

[0027] Figure 7 This is a schematic diagram of an explosion inside the disk;

[0028] Figure 8 This is a schematic diagram showing the position of the cylindrical strip;

[0029] Figure 9 This is a schematic diagram showing the connection between the first cylinder and the cylindrical strip;

[0030] In the diagram: 1. First arc-shaped plate; 11. First rectangular strip; 111. Rotary wheel; 12. Connecting rod; 121. Tooth; 13. Gear; 131. First cylinder; 14. First rectangular plate; 141. Second arc-shaped plate; 142. First rectangular block; 143. First L-shaped block; 144. Second L-shaped block; 2. First ring; 21. Second rectangular plate; 22. Disc; 221. First rectangular groove; 23. Circular plate; 23 1. Arc-shaped hole; 232. Cylindrical block; 233. Second ring; 24. Second cylinder; 241. Spring; 242. First cylindrical rod; 25. Third rectangular plate; 3. Base plate; 31. Second rectangular block; 32. Second cylindrical rod; 33. Second rectangular strip; 331. Third rectangular strip; 34. Cylindrical strip; 341. Second rectangular groove; 4. Welded head; 41. Third cylinder; 42. Fourth rectangular strip; 43. Slide rail. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example 1

[0032] like Figures 1-4 , Figure 7 As shown in the embodiment of the present invention, an automatic welding device for liquefied petroleum gas cylinders includes a base plate 3. Two sets of clamping components are provided on the upper end of the base plate 3. The first clamping components include two first arc-shaped plates 1, which can approach each other. The two sets of first clamping components can slide on the upper end of the base plate 3. A second clamping component is provided on one side of each of the two sets of first clamping components. The second clamping component includes a first ring 2. A disk 22 is rotatably arranged inside the first ring 2. A plurality of cylindrical blocks 232 are slidably arranged on one side of the disk 22. The first ring 2 can slide on the upper end of the base plate 3. A plurality of welding heads 4 are provided on one side of the upper end of the base plate 3.

[0033] Specifically, existing technology requires welding the cylinder body first, then transferring the cylinder body, and finally welding the protective cover and base to the upper and lower ends of the cylinder body. During the transfer process, the weld seams of the cylinder body may crack, and the welding process involves multiple steps, resulting in slow work efficiency. When using this welding equipment, the upper and lower cylinder bodies are first placed between two sets of first arc-shaped plates 1. Then, the two first arc-shaped plates 1 are driven to move closer together, clamping the upper and lower cylinder bodies. Next, the protective cover and base are placed between cylindrical blocks 232 on both sides. Then, several cylindrical blocks 232 on both sides are simultaneously driven to slide on one side of the disc 22, clamping the protective cover and base. Then, the two sets of first arc-shaped plates 1 are driven to move the upper and lower cylinder bodies simultaneously towards the center, assembling them together. Finally, the discs 22 on both sides are driven to move the protective cover and base clamped in the center of the cylindrical blocks 232 towards the center. The tank body is brought close together so that the protective cover abuts against one side of the upper tank body and the base abuts against one side of the lower tank body. Then, the welding head 4 is adjusted to be located at the weld seam between the upper and lower tank bodies, the weld seam between the protective cover and the upper tank body, and the weld seam between the base and the lower tank body. Then, the drive disc 22 drives the cylindrical block 232 to slide in the middle of the first ring 2, causing the protective cover and the base to rotate, and at the same time causing the upper and lower tank bodies to rotate. The welding head 4 is connected through a wire harness welding machine. The welding machine adopts a plasma arc welding machine. The welding head 4 is driven to weld each weld seam simultaneously. The tank body, protective cover and base of the steel cylinder can be welded at the same time, reducing the working steps and improving the working efficiency.

[0034] like Figure 5 As shown, first rectangular strips 11 slide through both sides of the first arc plate 1, the two first rectangular strips 11 are at 90 degrees, and a rotating wheel 111 is rotatably provided at the end of the first rectangular strip 11.

[0035] Specifically, before welding, the upper and lower cans are placed on the rotating wheel 111 located in the middle of the first arc plate 1. Then, the first rectangular bar 11 is driven to slide the rotating wheel 111 inside the first arc plate 1, which can clamp the can in the middle. At the same time, the sliding range of the first rectangular bar 11 is adjusted according to the can diameter, which can be used to clamp cans of different diameters.

[0036] like Figure 5 As shown, the first rectangular bar 11 is rotatably connected to a connecting rod 12 at the end away from the rotating wheel 111. The end of the connecting rod 12 away from the first rectangular bar 11 is rotatably connected to one side of the first arc plate 1 through a pin. The end of the connecting rod 12 away from the first rectangular bar 11 is provided with a plurality of teeth 121, and the teeth 121 respectively mesh with gears 13. The two gears 13 are rotatably connected to one side of the first arc plate 1 through pins, and the two gears 13 mesh with each other.

[0037] Specifically, by driving the gear 13 on one side to rotate, the gear 13 on the other side will rotate. The rotation of the gears 13 on both sides will drive the connecting rod 12 to rotate through the teeth 121 at one end of the connecting rod 12. When the connecting rod 12 rotates, it will drive the first rectangular strips 11 on both sides to slide inside the first arc plate 1. At the same time, it can drive each rotating wheel 111 to move inside the first arc plate 1. The movement of the two rotating wheels 111 inside the first arc plate 1 can be adjusted at the same time.

[0038] like Figure 4 As shown, a second rectangular block 31 is fixed to both sides of the upper end of the base plate 3, and a second cylindrical rod 32 is fixed between the two second rectangular blocks 31. A second arc plate 141 is fixed to the outside of the first arc plate 1 via the first rectangular plate 14. A first rectangular block 142 is fixed to the outside of the second arc plate 141. The first rectangular block 142 located at the lower end can slide on the outside of the second cylindrical rod 32. A first L-shaped block 143 is fixed to one side of the first rectangular block 142 located at the lower end, and a second L-shaped block 144 is fixed to one side of the first rectangular block 142 located at the upper end. The second L-shaped block 144 can slide inside the upper end of the first L-shaped block 143.

[0039] Specifically, by driving the second L-shaped block 144 to slide upward from inside the first L-shaped block 143, the second L-shaped block 144 drives the first arc plate 1 to move upward through the first rectangular block 142. The first arc plate 1 drives the rotating wheel 111 to move through the first rectangular bar 11. Then, the tank is placed on the upper end of the lower rotating wheel 111. Then, the second L-shaped block 144 is driven to slide into the first L-shaped block 143. The second L-shaped block 144 drives the first arc plate 1 to move downward through the first rectangular block 142. The first arc plate 1 drives the rotating wheel 111 to move downward through the first rectangular bar 11, clamping and fixing the middle tank. After clamping and fixing the upper and lower tanks, by driving the first rectangular block 142 at the lower end to slide outside the second cylindrical rod 32, the upper and lower tanks are brought closer to each other, so that the upper and lower tanks are assembled together, and then welding is performed.

[0040] like Figure 7 As shown, the second clamping assembly also includes a circular plate 23 rotatably connected to the center of the disk 22. The inner edge of the circular plate 23 is provided with a plurality of arc-shaped holes 231, and the cylindrical block 232 can slide inside the arc-shaped holes 231. A second ring 233 is fixedly connected to the end of the cylindrical block 232 away from the circular plate 23. The side of the disk 22 close to the circular plate 23 is provided with a first rectangular groove 221 corresponding to the position of the cylindrical block 232, and the ends of the cylindrical block 232 can slide in the first rectangular groove 221.

[0041] Specifically, when clamping the sheath and the base, the circular plate 23 is driven to rotate within the disc 22. When the circular plate 23 rotates, it causes the cylindrical block 232 to slide within the first rectangular groove 221. At the same time, the cylindrical block 232 slides within the arc-shaped hole 231, causing the cylindrical block 232 to move closer to the edges of the sheath and the base until the sheath and the base are clamped. Then, the disc 22 is driven to move the sheath and the base closer to the tank and fit together, followed by welding.

[0042] like Figure 6 As shown, a second rectangular plate 21 is fixedly connected to the lower end of the first ring 2, and a second cylinder 24 is slidably disposed in the middle of the two discs 22 respectively. A third rectangular plate 25 is fixedly connected to the end of the second cylinder 24 respectively. The third rectangular plate 25 and the second rectangular plate 21 can slide on the outside of the second cylindrical rod 32 respectively.

[0043] Specifically, after clamping and fixing the protective cover and base to one side of the disc 22, the third rectangular plates 25 on both sides are driven to slide on the second cylindrical rod 32 and slide towards the center. The third rectangular plate 25 on one side drives the second cylinder 24 to move closer to the upper tank body, and the third rectangular plate 25 on the other side drives the second cylinder 24 to move closer to the lower tank body, until the second cylinders 24 on both sides simultaneously squeeze the upper and lower tank bodies towards the center, making the upper and lower tank bodies fit more tightly. Then, the second rectangular plates 21 on both sides are driven to drive the disc 22 to move closer to the upper and lower tank bodies, until the protective cover and base are tightly attached to both ends of the tank body, combining all parts of the cylinder together and making all welds fit tightly, and then welding is performed.

[0044] like Figure 6 As shown, the two second cylinders 24 are fixed to the first cylindrical rod 242 by springs 241, and the first cylindrical rod 242 can slide inside the second cylinders 24.

[0045] Specifically, when the third rectangular plate 25 moves the second cylinder 24 closer to the tank, the second cylinder 24 moves the first cylindrical rod 242 to contact both ends of the tank. At the same time, the first cylindrical rod 242 slides into the second cylinder 24 and compresses the spring 241 to prevent excessive compression of the tank.

[0046] like Figure 9 As shown, a first cylinder 131 is inserted through and fixed in the middle of two opposing gears 13. A cylindrical strip 34 is slidably disposed in the middle of the first cylinder 131. A second rectangular groove 341 is provided at the upper end of the cylindrical strip 34. The first cylinder 131 can slide in the second rectangular groove 341 by means of a slider.

[0047] Specifically, by driving the cylindrical bar 34 to rotate, the cylindrical bar 34 drives two parallel gears 13 to rotate through the first cylinder 131, and at the same time drives the rotating wheel 111 to move within the first arc plate 1. When it is necessary to drive the upper and lower tanks on both sides to move closer to the center at the same time, the gears 13 can slide on the outside of the cylindrical bar 34 through the first cylinder 131. The first cylinder 131 slides within the second rectangular groove 341 through the slider, without affecting the rotation of the first cylinder 131 driven by the cylindrical bar 34.

[0048] like Figure 8 , Figure 9 As shown, the lower cylindrical strip 34 has a second rectangular strip 33 fixedly connected to both ends, and the upper cylindrical strip 34 has a third rectangular strip 331 fixedly connected to both ends. The third rectangular strip 331 can slide inside the second rectangular strip 33.

[0049] Specifically, when the can needs to be taken out, the second L-shaped block 144 at the upper end drives the first arc plate 1 at the upper end to slide upward, and the gear 13 at the upper end drives the cylindrical strip 34 to slide upward through the first cylinder 131. The two ends of the cylindrical strip 34 drive the third rectangular strip 331 to slide upward within the second rectangular strip 33. Example 2

[0050] like Figure 3 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a third cylinder 41 is slidably connected to one end of the welding head 4, and a fourth rectangular strip 42 is fixedly connected to the end of the third cylinder 41 away from the welding head 4. The lower ends of the fourth rectangular strip 42 can slide on the slide rail 43, and the slide rail 43 is fixedly connected to the upper end of the base plate 3.

[0051] Specifically, after assembling the upper and lower tanks, the sheath and base are then assembled with the tank. The fourth rectangular bar 42 is then driven to slide on the upper end of the slide rail 43, moving each welding head 4 to the side of the weld seam between the upper and lower tanks, the weld seam between the sheath and the tank, and the weld seam between the base and the pipe. The welding head 4 is then driven to slide inside the third cylinder 41, so that the output end of the welding head 4 is close to the weld seam, and then welding is performed.

[0052] Working principle: By driving the second L-shaped block 144 to slide upward from inside the first L-shaped block 143, the second L-shaped block 144 drives the first arc-shaped plate 1 to move upward via the first rectangular block 142. The first arc-shaped plate 1 drives the rotating wheel 111 to move via the first rectangular bar 11. Then, the can is placed on the upper end of the lower rotating wheel 111. Subsequently, the second L-shaped block 144 is driven to slide into the first L-shaped block 143. The second L-shaped block 144 drives the first arc-shaped plate 1 to move downward via the first rectangular block 142. Plate 1 moves downward via the first rectangular bar 11, driving the rotating wheel 111 to clamp and fix the tank in the middle. The rotation of one gear 13 drives the other gear 13 to rotate. The rotation of the two gears 13 drives the connecting rod 12 via teeth 121 at one end. When the connecting rod 12 rotates, it causes the first rectangular bars 11 on both sides to slide inside the first arc-shaped plate 1, simultaneously moving each rotating wheel 111 inside the first arc-shaped plate 1. Both rotating wheels 111 can be adjusted simultaneously within the arc-shaped plate. 1. Internal movement clamps the central tank body. Driven by the rotating circular plate 23 within the disc 22, the rotating plate 23 causes the cylindrical block 232 to slide within the first rectangular groove 221, simultaneously sliding within the arc-shaped hole 231. This causes the cylindrical block 232 to move closer to the edge of the sheath and base until the sheath and base are clamped. After the sheath and base are clamped and fixed to one side of the disc 22, the third rectangular plates 25 on both sides slide on the second cylindrical rod 32 while simultaneously sliding towards the center. Plate 25 drives the second cylinder 24 to move closer to the upper tank body, while the third rectangular plate 25 on the other side drives the second cylinder 24 to move closer to the lower tank body, until the second cylinders 24 on both sides simultaneously squeeze the upper and lower tank bodies towards the center, making the upper and lower tank bodies fit more tightly. Then, the second rectangular plates 21 on both sides drive the disc 22 to move closer to the upper and lower tank bodies on one side, until the protective cover and the base are tightly attached to both ends of the tank body, combining the various parts of the cylinder together and making the various welds fit tightly, and then welding is performed.

[0053] The fourth rectangular bar 42 is driven to slide on the upper end of the slide rail 43, which moves each welding head 4 to the side of the weld seam between the upper tank and the lower tank, the weld seam between the cover and the tank, and the weld seam between the base and the pipe. Then the welding head 4 is driven to slide inside the third cylinder 41, so that the output end of the welding head 4 is close to the weld seam, and then welding is performed.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquefied gas cylinder automatic welding equipment, comprising a base plate (3), the upper end of the base plate (3) is provided with two groups of first clamping assemblies, characterized in that: The first clamping assembly comprises two first arc-shaped plates (1), the two first arc-shaped plates (1) can approach each other, two groups of the first clamping assembly can slide on the upper end of the bottom plate (3), one side of two groups of the first clamping assembly is respectively provided with a second clamping assembly, the second clamping assembly comprises a first circular ring (2), a disc (22) is rotatably arranged in the first circular ring (2), a plurality of cylindrical blocks (232) are slidably arranged on one side of the disc (22), the first circular ring (2) can slide on the upper end of the bottom plate (3), a plurality of welding heads (4) are arranged on one side of the upper end of the bottom plate (3); The first arc-shaped plate (1) is slidably penetrated by a first rectangular strip (11) on both sides, the first rectangular strip (11) is 90 degrees, and a rotating wheel (111) is rotatably arranged at the end of the first rectangular strip (11); The first rectangular strip (11) is rotatably connected with a connecting rod (12) at the end away from the rotating wheel (111), the connecting rod (12) is rotatably connected with one side of the first arc-shaped plate (1) through a pin shaft at the end away from the first rectangular strip (11), a plurality of teeth (121) are arranged on the end of the connecting rod (12) away from the first rectangular strip (11), the teeth (121) are respectively meshed with a gear (13), and the two gears (13) are rotatably connected with one side of the first arc-shaped plate (1) through a pin shaft, and the two gears (13) are meshed with each other; The bottom plate (3) is fixedly connected with a second rectangular block (31) on both sides of the upper end, the second rectangular block (31) is fixedly connected with a second cylindrical rod (32) between the two, the first arc-shaped plate (1) is fixedly connected with a second arc-shaped plate (141) through a first rectangular plate (14) on the outside, the second arc-shaped plate (141) is fixedly connected with a first rectangular block (142) on the outside, the first rectangular block (142) at the lower end can slide on the outside of the second cylindrical rod (32), the first rectangular block (142) at the lower end is fixedly connected with a first L-shaped block (143) on one side, the first rectangular block (142) at the upper end is fixedly connected with a second L-shaped block (144) on one side, and the second L-shaped block (144) can slide on the inside of the first L-shaped block (143) at the upper end; The first circular ring (2) is fixedly connected with a second rectangular plate (21) at the lower end, a second cylinder (24) is slidably arranged in the middle of the two discs (22), and a third rectangular plate (25) is fixedly connected to the end of the second cylinder (24); The interiors of the two second cylinders (24) are fixedly connected with a first cylindrical rod (242) through a spring (241), and the first cylindrical rod (242) can slide in the interior of the second cylinder (24). The two gears (13) are penetrated and fixed with a first cylinder (131) in the middle, the first cylinder (131) is slidably provided with a cylindrical bar (34) in the middle, the upper end of the cylindrical bar (34) is provided with a second rectangular groove (341), the first cylinder (131) can slide in the second rectangular groove (341) through the slider.

2. The apparatus according to claim 1, wherein: The second clamping assembly further comprises a disc (22) rotatably connected with a circular plate (23) in the middle, the inner edge of the circular plate (23) is provided with a plurality of arc-shaped holes (231), the cylindrical block (232) can slide in the arc-shaped hole (231), the second circular ring (233) is respectively fixed on the end of the cylindrical block (232) away from the circular plate (23), the disc (22) is respectively provided with a first rectangular groove (221) on the side close to the circular plate (23) corresponding to the position of the cylindrical block (232), the end of the cylindrical block (232) can respectively slide in the first rectangular groove (221).

3. The apparatus according to claim 1, wherein: The cylindrical bar (34) located at the lower end is respectively fixed with a second rectangular bar (33) at both ends, the cylindrical bar (34) located at the upper end is respectively fixed with a third rectangular bar (331) at both ends, the third rectangular bar (331) can slide in the second rectangular bar (33).

4. The apparatus according to claim 1, wherein: The welding head (4) is respectively slidably connected with a third cylinder (41) at one end, the fourth rectangular bar (42) is respectively fixed on the end of the third cylinder (41) away from the welding head (4), the fourth rectangular bar (42) can respectively slide on the slide rail (43) at the lower end, the slide rail (43) is fixed on the upper end of the bottom plate (3).

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