Building steel structure welding device

Abstract

The invention discloses a building steel structure welding device, which belongs to the technical field of building steel structure welding, and comprises a supporting assembly for supporting a limiting assembly; the limiting assembly is used for limiting the steel structure; the clamping assembly is used for clamping the steel structure; the adjusting assembly is used for adjusting the position of the limiting assembly, so that the limiting assembly limits the steel structures with different lengths; and the guide assembly is used for guiding and limiting the grinding assembly. An auxiliary limiting plate is arranged, the auxiliary limiting plate is pushed, a gear rotates, a limiting rod slides on a sliding ring, the position of the auxiliary limiting plate is adjusted, one end of a building steel structure is placed on the auxiliary limiting plate, the steel structure extrudes an auxiliary clamping plate, the position of the auxiliary clamping plate is adjusted, and the auxiliary clamping plate is matched with a main clamping plate; and when the steel structure extrudes an auxiliary clamping plate, an inserting block can be conveniently driven to descend, and a gear can be limited.

Description

Technical Field

[0001] The present invention relates to a welding device, in particular to a welding device for building steel structures, belonging to the technical field of building steel structure welding. Background Art

[0002] During the assembly construction process of steel structure buildings, it is necessary to perform butt welding on steel components such as steel sections. When welding, a welding device is required to support and weld the welded parts.

[0003] However, for the existing building steel structure welding devices, during actual use, it is not convenient to adjust the positions of the limiting plate and the clamping plate. Generally, it is necessary for the staff to first adjust the position of the limiting plate, then limit the moved limiting plate, and then adjust the clamping plate to clamp the building steel structure, and the operation process is relatively cumbersome and inconvenient to use. Summary of the Invention

[0004] The main purpose of the present invention is to solve the problem that it is not convenient to adjust the positions of the limiting plate and the clamping plate, and to provide a welding device for building steel structures.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] A welding device for building steel structures includes

[0007] a support assembly for supporting the limiting assembly;

[0008] a limiting assembly for limiting the steel structure;

[0009] a clamping assembly for clamping the steel structure;

[0010] an adjusting assembly for adjusting the position of the limiting assembly so that the limiting assembly can limit steel structures of different lengths;

[0011] a guiding assembly for guiding and limiting the grinding assembly;

[0012] a grinding assembly for grinding the welding joint of the steel structure;

[0013] a positioning assembly for positioning the adjusted limiting assembly;

[0014] a moving assembly for guiding and limiting the limiting assembly;

[0015] a welding assembly for welding the steel structure.

[0016] Preferably, the support assembly includes a bottom plate, bottom legs, a support rod, and a first support block. The bottom legs are installed on the top of the bottom plate, the first support block is installed on the bottom plate, and the support rod is installed on the first support block.

[0017] Preferably, the limiting component includes a main limiting plate, an auxiliary limiting plate, a top block and a side block. One end of the bottom leg is provided with the main limiting plate, one end of the support rod is provided with the auxiliary limiting plate, the top block is installed on the auxiliary limiting plate, and the side block is installed on the main limiting plate.

[0018] Preferably, the clamping component includes a main clamping plate, an auxiliary clamping plate, a ball, a connecting block, a first spring, a moving rod and a moving block. The main clamping plates are installed on both the auxiliary limiting plate and the main limiting plate. The auxiliary clamping plate is slidably installed on the main clamping plate. The connecting block is installed on the auxiliary clamping plate. The moving block is installed on the connecting block. A sliding cavity matched with the moving block is formed in the auxiliary limiting plate. A moving rod is installed inside the sliding cavity. A sliding hole matched with the moving rod is formed in the moving block. The moving block is connected to the auxiliary limiting plate through the first spring. The balls are rotatably installed on both the main clamping plate and the auxiliary clamping plate.

[0019] Preferably, the adjusting component includes a gear, a rack and a rotating rod. The rack is installed on the bottom plate. The rotating rod is rotatably installed on the first support block. The gear meshingly connected with the rack is installed on the rotating rod.

[0020] Preferably, the guiding component includes a first guiding rod, a first guiding ring and a first connecting rod. The first guiding rod is installed on the connecting block. The first guiding ring is slidably installed on the first guiding rod. The first connecting rod is installed on the first guiding ring. One end of the first connecting rod is connected to the grinding component.

[0021] Preferably, the grinding component includes a bracket, a grinding block, a second support block, a second guiding rod, a second guiding ring and a first side post. One end of the first connecting rod is provided with the second support block. The bracket is installed on the second support block. The grinding block is installed on the bracket. The second guiding rod is installed on the top of the second support block. The first side post is installed on the welding component. The second guiding ring is installed on the first side post. The second guiding ring is slidably connected with the second guiding rod.

[0022] Preferably, the positioning component includes a second connecting rod, a connecting plate and a plug block. The second connecting rod is installed on the connecting block. One end of the second connecting rod is provided with the connecting plate. One end of the connecting plate is provided with the plug block.

[0023] Preferably, the moving component includes a limiting rod, a limiting ring, a moving plate, a sliding ring and a second side post. The second side post is installed on the side block. One end of the second side post is provided with the sliding ring. The limiting rod is installed on the top block. The sliding ring is slidably connected with the limiting rod. The limiting ring is slidably installed on the limiting rod. The moving plate is installed on the limiting ring.

[0024] Preferably, the welding assembly includes a top plate, a welding head, a sliding rod, and a second spring. A sliding rod is slidably installed on the moving plate. One end of the sliding rod is provided with a top plate, and a welding head is installed at the bottom of the top plate. The limiting ring is connected to the top plate through the second spring, and a first side post is installed on the top plate.

[0025] The beneficial technical effects of the present invention:

[0026] 1. According to the building steel structure welding device of the present invention, by setting the auxiliary limiting plate, pushing the auxiliary limiting plate, the gear rotates, and the limiting rod slides on the sliding ring to adjust the position of the auxiliary limiting plate. Place one end of the building steel structure on the auxiliary limiting plate, and the steel structure presses the auxiliary clamping plate to adjust the position of the auxiliary clamping plate. The auxiliary clamping plate and the main clamping plate cooperate with each other, which can facilitate the clamping and limiting of the steel structure. Moreover, when the steel structure presses the auxiliary clamping plate, it can drive the insertion block to descend, which can limit the gear. Cooperating with the rack, it can limit the adjusted auxiliary limiting plate. There is no need for the staff to limit the auxiliary limiting plate after adjusting it and then manually adjust the position of the auxiliary clamping plate to clamp the steel structure. The operation only requires two steps, which is less than the existing operation steps, and the operation is convenient, which can improve work efficiency.

[0027] 2. By setting the top plate, pressing the top plate, the second spring elongates, which can drive the welding head to descend. When the welding head starts, it can weld the connection of the steel structure. By setting the ball, it can facilitate the rotation of the steel structure to cooperate with the welding head, and multiple welds can be performed. Description of the Drawings

[0028] Figure 1 is the overall structural schematic diagram of the present invention;

[0029] Figure 2 is the structural schematic diagram of the auxiliary limiting plate of the present invention;

[0030] Figure 3 is the structural schematic diagram of the auxiliary clamping plate of the present invention;

[0031] Figure 4 is the structural schematic diagram of the main clamping plate of the present invention;

[0032] Figure 5 is the structural schematic diagram of the first spring of the present invention;

[0033] Figure 6 is the structural schematic diagram of the gear of the present invention;

[0034] Figure 7 is the structural schematic diagram of the second spring of the present invention;

[0035] Figure 8 is the structural schematic diagram of the guide rod of the present invention;

[0036] Figure 9 Schematic structural diagram of the guiding ring of the present invention;

[0037] Figure 10 Schematic structural diagram of the welding head of the present invention;

[0038] Figure 11 Schematic structural diagram of the main limiting plate of the present invention.

[0039] In the figure: 1, bottom plate; 11, bottom legs; 12, support rods; 13, first support block; 2, main limiting plate; 21, auxiliary limiting plate; 22, top block; 23, side block; 3, main clamping plate; 31, auxiliary clamping plate; 32, balls; 33, connecting block; 34, first spring; 35, moving rod; 36, moving block; 4, gear; 41, rack; 42, rotating rod; 5, first guiding rod; 51, first guiding ring; 52, first connecting rod; 6, bracket; 61, grinding block; 62, second support block; 63, second guiding rod; 64, second guiding ring; 65, first side column; 7, second connecting rod; 71, connecting plate; 72, inserting block; 8, limiting rod; 81, limiting ring; 82, moving plate; 83, sliding ring; 84, second side column; 9, top plate; 91, welding head; 92, sliding rod; 93, second spring. Detailed implementation manners

[0040] To make the technical solutions of the present invention clearer and more definite to those skilled in the art, the present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings. However, the implementation manners of the present invention are not limited thereto.

[0041] As Figures 1 - 11As shown in the figure, the building steel structure welding device provided in this embodiment includes a support assembly for supporting the limit assembly; a limit assembly for limiting the steel structure; a clamping assembly for clamping the steel structure; an adjustment assembly for adjusting the position of the limit assembly so that the limit assembly can limit steel structures of different lengths; a guiding assembly for guiding and limiting the grinding assembly; a grinding assembly for grinding the welding joints of the steel structure; a positioning assembly for positioning the adjusted limit assembly; and a moving assembly for guiding and limiting the limit assembly.Welding assembly for welding steel structures. The clamping assembly includes a main clamping plate 3, an auxiliary clamping plate 31, balls 32, a connecting block 33, a first spring 34, a moving rod 35 and a moving block 36. The main clamping plate 3 is installed on both the auxiliary limiting plate 21 and the main limiting plate 2. The auxiliary clamping plate 31 is slidably installed on the main clamping plate 3. The connecting block 33 is installed on the auxiliary clamping plate 31. The moving block 36 is installed on the connecting block 33. A sliding cavity matching with the moving block 36 is formed on the auxiliary limiting plate 21. The moving rod 35 is installed inside the sliding cavity. A sliding hole matching with the moving rod 35 is formed on the moving block 36. The moving block 36 is connected to the auxiliary limiting plate 21 through the first spring 34. Balls 32 are rotatably installed on both the main clamping plate 3 and the auxiliary clamping plate 31. The limiting assembly includes a main limiting plate 2, an auxiliary limiting plate 21, a top block 22 and a side block 23. One end of the bottom leg 11 is installed with the main limiting plate 2. One end of the support rod 12 is installed with the auxiliary limiting plate 21. The top block 22 is installed on the auxiliary limiting plate 21. The side block 23 is installed on the main limiting plate 2. The support assembly includes a bottom plate 1, bottom legs 11, support rods 12 and a first support block 13. The bottom legs 11 are installed on the top of the bottom plate 1. The first support block 13 is installed on the bottom plate 1. The support rods 12 are installed on the first support block 13. The adjusting assembly includes a gear 4, a rack 41 and a rotating rod 42. The rack 41 is installed on the bottom plate 1. The rotating rod 42 is rotatably installed on the first support block 13. The gear 4 meshing with the rack 41 is installed on the rotating rod 42. The positioning assembly includes a second connecting rod 7, a connecting plate 71 and an inserting block 72. The second connecting rod 7 is installed on the connecting block 33. The connecting plate 71 is installed at one end of the second connecting rod 7. The inserting block 72 is installed at one end of the connecting plate 71. By setting the auxiliary limiting plate 21, pushing the auxiliary limiting plate 21, the gear 4 rotates, and the limiting rod 8 slides on the sliding ring 83 to adjust the position of the auxiliary limiting plate 21. Place one end of the building steel structure on the auxiliary limiting plate 21. The steel structure presses the auxiliary clamping plate 31 to adjust the position of the auxiliary clamping plate 31. The auxiliary clamping plate 31 and the main clamping plate 3 cooperate with each other to facilitate clamping and limiting of the steel structure. When the steel structure presses the auxiliary clamping plate 31, it can drive the inserting block 72 to descend, which can limit the gear 4. Cooperating with the rack 41, it can limit the adjusted auxiliary limiting plate 21. There is no need for the staff to limit the auxiliary limiting plate 21 after adjusting it and then manually adjust the position of the auxiliary clamping plate 31 to clamp the steel structure. The operation only requires two steps, which is less than the existing operation steps, and the operation is convenient, which can improve work efficiency. By setting the bottom plate 1 and the bottom legs 11 to cooperate with each other, it can facilitate the support of the main limiting plate 2. By setting the first support block 13 and the support rods 12 to cooperate with each other, it can facilitate the support of the auxiliary limiting plate 21. By setting the moving block 36 and the moving rod 35 to cooperate with each other, it can facilitate the guiding and limiting of the auxiliary clamping plate 31.;

[0042] In this embodiment, as Figure 1 、 Figure 2 、 Figure 7, Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown in Figure 8 , Figure 9 , Figure 10 and Figure 11 , the guiding assembly includes a first guiding rod 5, a first guiding ring 51 and a first connecting rod 52. The first guiding rod 5 is installed on the connecting block 33. The first guiding ring 51 is slidably installed on the first guiding rod 5. The first connecting rod 52 is installed on the first guiding ring 51. One end of the first connecting rod 52 is connected to the grinding assembly. The grinding assembly includes a bracket 6, a grinding block 61, a second support block 62, a second guiding rod 63, a second guiding ring 64 and a first side column 65. One end of the first connecting rod 52 is installed with the second support block 62. The bracket 6 is installed on the second support block 62. The grinding block 61 is installed on the bracket 6. The second guiding rod 63 is installed on the top of the second support block 62. The first side column 65 is installed on the welding assembly. The second guiding ring 64 is installed on the first side column 65. The second guiding ring 64 is slidably connected with the second guiding rod 63. The moving assembly includes a limiting rod 8, a limiting ring 81, a moving plate 82, a sliding ring 83 and a second side column 84. The second side column 84 is installed on the side block 23. One end of the second side column 84 is installed with the sliding ring 83. The limiting rod 8 is installed on the top block 22. The sliding ring 83 is slidably connected with the limiting rod 8. The limiting ring 81 is slidably installed on the limiting rod 8. The moving plate 82 is installed on the limiting ring 81. The welding assembly includes a top plate 9, a welding head 91, a sliding rod 92 and a second spring 93. The sliding rod 92 is slidably installed on the moving plate 82. One end of the sliding rod 92 is installed with the top plate 9. The welding head 91 is installed at the bottom of the top plate 9. The limiting ring 81 is connected to the top plate 9 through the second spring 93. The first side column 65 is installed on the top plate 9. By setting the top plate 9, pressing the top plate 9, the second spring 93 extends, which can drive the welding head 91 to descend. When the welding head 91 is started, it can weld the connection of the steel structure. By setting the ball 32, it is convenient to rotate the steel structure to cooperate with the welding head 91 for multiple welding. And when the steel structure is rotated by setting the ball 32, the welded part of the steel structure contacts the grinding block 61 for preliminary grinding. By setting the second guiding rod 63 and the second guiding ring 64 to cooperate with each other, it is convenient to guide and limit the top plate 9. By setting the first guiding rod 5 and the first guiding ring 51 to cooperate with each other, it is convenient to guide and limit the bracket 6. Slide the bracket 6, the first guiding ring 51 slides on the first guiding rod 5, and then drive the bracket 6 and the welding head 91 to move, and move the bracket 6 and the welding head 91 to the welding position.

[0043] In this embodiment, as Figures 1 - 11 shown, the working process of a building steel structure welding device provided in this embodiment is as follows:

[0044] Step 1: Install one end of one steel structure on the main limit plate 2. The steel structure presses against the auxiliary clamping plate 31 to adjust the position of the auxiliary clamping plate 31. The auxiliary clamping plate 31 cooperates with the main clamping plate 3 to push the auxiliary limit plate 21, causing the gear 4 to rotate. The limit rod 8 slides on the sliding ring 83 to adjust the position of the auxiliary limit plate 21. Place one end of the other building steel structure on the auxiliary limit plate 21. The steel structure presses against the auxiliary clamping plate 31 to adjust the position of the auxiliary clamping plate 31. The auxiliary clamping plate 31 cooperates with the main clamping plate 3 to clamp and limit the steel structure. When the steel structure presses against the auxiliary clamping plate 31, it drives the insertion block 72 to descend to limit the gear 4, and cooperates with the rack 41 to limit the adjusted auxiliary limit plate 21.

[0045] Step 2: Slide the bracket 6. The first guide ring 51 slides on the first guide rod 5, thereby driving the bracket 6 and the welding head 91 to move, and moving the bracket 6 and the welding head 91 to the welding position.

[0046] Step 3: Press the top plate 9. The second spring 93 extends, driving the welding head 91 to descend. The welding head 91 is activated to weld the connection of the steel structure. Rotate the steel structure. The steel structure rotates on the ball 32 to adjust the welding position, and the welding position contacts and rubs against the bracket 6 to preliminarily polish the welding position.

[0047] In summary, in this embodiment, according to the building steel structure welding device of this embodiment, by setting the auxiliary limiting plate 21, pushing the auxiliary limiting plate 21, the gear 4 rotates, and the limiting rod 8 slides on the sliding ring 83 to adjust the position of the auxiliary limiting plate 21. Place one end of the building steel structure on the auxiliary limiting plate 21, the steel structure squeezes the auxiliary clamping plate 31 to adjust the position of the auxiliary clamping plate 31. The auxiliary clamping plate 31 and the main clamping plate 3 cooperate with each other, which can facilitate the clamping and limiting of the steel structure. When the steel structure squeezes the auxiliary clamping plate 31, it can drive the insertion block 72 to descend, which can limit the gear 4. Cooperating with the rack 41, it can limit the adjusted auxiliary limiting plate 21. There is no need for the staff to adjust the auxiliary limiting plate 21 and then limit the auxiliary limiting plate 21 and then manually adjust the position of the auxiliary clamping plate 31 to clamp the steel structure. The operation only requires two steps, which is less than the existing operation steps, is convenient to operate, and can improve work efficiency. By setting the bottom plate 1 and the bottom legs 11 to cooperate with each other, it can facilitate the support of the main limiting plate 2. By setting the first support block 13 and the support rod 12 to cooperate with each other, it can facilitate the support of the auxiliary limiting plate 21. By setting the moving block 36 and the moving rod 35 to cooperate with each other, it can facilitate the guiding and limiting of the auxiliary clamping plate 31. By setting the top plate 9, pressing the top plate 9, the second spring 93 elongates, which can drive the welding head 91 to descend. When the welding head 91 is started, it can weld the connection of the steel structure. By setting the ball 32, it can facilitate the rotation of the steel structure to cooperate with the welding head 91 for multiple welds. And when the ball 32 rotates the steel structure, the welded part of the steel structure contacts the grinding block 61 for preliminary grinding. By setting the second guiding rod 63 and the second guiding ring 64 to cooperate with each other, it can facilitate the guiding and limiting of the top plate 9. By setting the first guiding rod 5 and the first guiding ring 51 to cooperate with each other, it can facilitate the guiding and limiting of the bracket 6. Slide the bracket 6, and the first guiding ring 51 slides on the first guiding rod 5, thereby driving the bracket 6 and the welding head 91 to move, and moving the bracket 6 and the welding head 91 to the welding position.

[0048] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0049] It should be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or system comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the commodity or system comprising the element.

[0050] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in the relevant field. Any changes and variations made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A building steel structure welding device, characterized in that: include A support component, used for supporting the limit component; Limiting components, used to limit the steel structure; A clamping assembly, used for clamping the steel structure; An adjusting component is used to adjust the position of the limiting component so that the limiting component can limit the steel structures of different lengths; A guide assembly, used for guiding and limiting the grinding assembly; Grinding assembly, used for grinding the welds of steel structures; A positioning component, used for positioning the adjusted limit component; A moving component, used for guiding and limiting the limiting component; Welding components for welding steel structures.

2. A building steel structure welding device according to claim 1, characterized in that: The support assembly comprises a base plate (1), a base leg (11), a support rod (12) and a first support block (13); the base leg (11) is mounted on the top of the base plate (1); the first support block (13) is mounted on the base plate (1); and the support rod (12) is mounted on the first support block (13).

3. A building steel structure welding device according to claim 2, characterized in that: The limiting assembly comprises a main limiting plate (2), an auxiliary limiting plate (21), a top block (22) and a side block (23); one end of the bottom leg (11) is mounted with the main limiting plate (2); one end of the support rod (12) is mounted with the auxiliary limiting plate (21); the top block (22) is mounted on the auxiliary limiting plate (21); and the side block (23) is mounted on the main limiting plate (2).

4. A building steel structure welding device according to claim 3, characterized in that: The clamping assembly comprises a main clamping plate (3), an auxiliary clamping plate (31), a ball (32), a connecting block (33), a first spring (34), a moving rod (35) and a moving block (36); the auxiliary limit plate (21) and the main limit plate (2) are both mounted with the main clamping plate (3); the auxiliary clamping plate (31) is slidably mounted on the main clamping plate (3); the connecting block (33) is mounted on the auxiliary clamping plate (31); and the connecting block (33) is mounted with a moving rod (35). The auxiliary limit plate (21) is provided with a sliding cavity which cooperates with the moving block (36), a moving rod (35) is installed inside the sliding cavity, the moving block (36) is provided with a sliding hole which cooperates with the moving rod (35), the moving block (36) is connected to the auxiliary limit plate (21) through a first spring (34), and balls (32) are rotatably installed on both the main splint (3) and the auxiliary splint (31).

5. A building steel structure welding device according to claim 4, characterized in that: The adjustment assembly comprises a gear (4), a rack (41) and a rotating rod (42); the rack (41) is mounted on the base plate (1); the rotating rod (42) is rotatably mounted on the first support block (13); and the rotating rod (42) is mounted on a gear (4) meshing with the rack (41).

6. A building steel structure welding device according to claim 5, characterized in that: The guide assembly comprises a first guide rod (5), a first guide ring (51) and a first connecting rod (52); the first guide rod (5) is mounted on the connecting block (33); the first guide ring (51) is slidably mounted on the first guide rod (5); the first connecting rod (52) is mounted on the first guide ring (51); one end of the first connecting rod (52) is connected to the grinding assembly.

7. A building steel structure welding device according to claim 6, characterized in that: The grinding assembly comprises a bracket (6), a grinding block (61), a second support block (62), a second guide rod (63), a second guide ring (64) and a first side column (65); the second support block (62) is installed at one end of the first connecting rod (52); the bracket (6) is installed on the second support block (62); the grinding block (61) is installed on the bracket (6); the second guide rod (63) is installed on the top of the second support block (62); the first side column (65) is installed on the welding assembly; the second guide ring (64) is installed on the first side column (65); the second guide ring (64) is slidably connected to the second guide rod (63).

8. A building steel structure welding device according to claim 7, characterized in that: The positioning assembly comprises a second connecting rod (7), a connecting plate (71) and an insert block (72); the second connecting rod (7) is mounted on the connecting block (33); one end of the second connecting rod (7) is mounted with a connecting plate (71); and one end of the connecting plate (71) is mounted with an insert block (72).

9. A building steel structure welding device according to claim 8, characterized in that: The moving assembly comprises a limiting rod (8), a limiting ring (81), a moving plate (82), a slip ring (83) and a second side column (84); the second side column (84) is installed on the side block (23); one end of the second side column (84) is installed with a slip ring (83); the limiting rod (8) is installed on the top block (22); the slip ring (83) is slidably connected to the limiting rod (8); the limiting ring (81) is slidably installed on the limiting rod (8); and the moving plate (82) is installed on the limiting ring (81).

10. A building steel structure welding device according to claim 9, characterized in that: The welding assembly comprises a top plate (9), a welding head (91), a sliding rod (92) and a second spring (93); the sliding rod (92) is slidably mounted on the movable plate (82); one end of the sliding rod (92) is mounted with the top plate (9); the welding head (91) is mounted at the bottom of the top plate (9); the limiting ring (81) is connected to the top plate (9) via the second spring (93); and a first side column (65) is mounted on the top plate (9).

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