A welding clamping device and welding equipment for a gas tank

Abstract

The application relates to the technical field of improving the welding effect of a gas tank, and provides a welding clamping device for a gas tank, which comprises a rack, two outer clamping mechanisms, two inner clamping mechanisms and a driving mechanism; the rack comprises a base and a rotating frame; the rotating frame is rotationally connected to the base; the outer clamping mechanism comprises outer clamping plates and limiting columns, one of the outer clamping plates is arranged at one end of the rotating frame, the other outer clamping plate is slidingly connected to the rotating frame, and the limiting columns are arranged on the inner side of the rotating frame; the inner clamping mechanism comprises inner clamping plates, first clamping components and second clamping components, the two inner clamping plates are arranged at intervals along the length direction of the rotating frame, and the first clamping components and the second clamping components are arranged between the inner clamping plates and used for clamping front plates. Based on this, the welding effect of the gas tank can be improved. In addition, a welding equipment is also provided.

Description

Technical Field

[0001] This application relates to the field of gas box welding, and in particular to a gas box welding clamping device and welding equipment. Background Technology

[0002] An environmental protection cabinet is a specialized device used for the safe storage, handling, or discharge of hazardous substances (such as chemicals, volatile organic compounds, corrosive liquids, etc.), aiming to reduce harm to the environment and human health. The gas chamber is a crucial component of the environmental protection cabinet.

[0003] like Figure 1 The air box 5 shown includes a front plate 51 and two side plates 52. The two side plates 52 are welded and fixed to both sides of the front plate 51 by welding equipment. The welding equipment includes a placement table and a welding robot. The two side plates are pre-welded and fixed to the front plate by spot welding, and then placed on the placement table for simple positioning. After that, the welding robot performs full welding between the side plates and the front plate.

[0004] However, in practical applications, operators need to adjust the position between the gas box and the welding robot to ensure that the connections between the front plate and the two side plates can be welded. This is cumbersome, and the placement table has a poor limiting effect on the pre-welded gas box, resulting in poor welding effect. Therefore, improvements are needed. Summary of the Invention

[0005] In order to improve the welding effect of the gas box, in a first aspect, this application provides a welding clamping device for the gas box.

[0006] The welding clamping device for a gas box provided in this application adopts the following technical solution: A welding clamping device for a gas box includes a frame, two external clamping mechanisms, two internal clamping mechanisms, and a drive mechanism; the frame includes a base and a rotating frame; the rotating frame is rotatably connected to the base; The external clamping mechanism includes an external clamping plate and a limiting post. The two external clamping plates are spaced apart along the length of the rotating frame. One of the external clamping plates is located at one end of the rotating frame, and the other external clamping plate is slidably connected to the rotating frame along the length of the rotating frame. The limiting post is located on the inner side of the rotating frame. The inner clamping mechanism includes an inner clamping plate, a first clamping component, and a second clamping component. The two inner clamping plates are spaced apart along the length of the rotating frame and located between the two outer clamping plates. The first clamping component and the second clamping component are respectively located between the inner clamping plates and are used to clamp the front plate. The driving mechanism includes a first driving component and a second driving component; the first driving component is used to drive the rotating frame to rotate, and the second driving component is used to drive the outer clamping plate to slide.

[0007] By adopting the above technical solution, in practical applications, after the two side plates are pre-welded and fixed to the front plate by spot welding, the pre-welded gas box is transported to the two inner clamping plates by a gantry crane, so that the front plate overlaps the upper end of the two inner clamping plates. Then, the second drive assembly drives the outer clamping plate to slide, thereby moving the pre-welded gas box so that the two side plates abut against the two outer clamping plates respectively, and the lower end of the side plates overlaps the limiting post. The first clamping assembly and the second clamping assembly work to clamp and fix one side of the lower end of the front plate to the upper end, which can ensure the limiting effect of the front plate and the two side plates. At the same time, the first drive assembly drives the rotating frame to rotate, which can adjust the position between the gas box and the welding robot. The operation is simple and convenient, thereby effectively improving the welding effect of the gas box.

[0008] Preferably, the external clamping mechanism further includes a sliding seat and a third driving component. The sliding seat is slidably connected to the external clamping plate in a vertical direction. The limiting post is disposed on the sliding seat. The third driving component is disposed on the external clamping plate and is used to drive the sliding seat to slide.

[0009] By adopting the above technical solution, and by setting a sliding seat and a third driving component, the third driving component drives the sliding seat to slide, thereby changing the position of the limiting post, so that the welding clamping device can be applied to gas boxes of different sizes.

[0010] Preferably, the third drive assembly includes a lead screw and a first drive member. The lead screw is rotatably connected to the outer clamping plate and threadedly connected to the sliding seat. The first drive member is disposed on the outer clamping plate and is used to drive the lead screw to rotate.

[0011] By adopting the above technical solution, and by setting a lead screw and a first driving component, the first driving component drives the lead screw to rotate so that the sliding seat can slide. The structure is simple and the operation is stable.

[0012] Preferably, the external clamping mechanism further includes an abutment post, which is disposed on the side of the external clamping plate located at the limiting post.

[0013] By adopting the above technical solution and setting abutment posts, a gap is created between the side plate and the outer clamping plate to provide welding space for the welding robot.

[0014] Preferably, the first clamping assembly includes a mounting block, a first chuck, and a second driving member. The mounting block is located at the lower end of the inner clamping plate, the first chuck is rotatably connected to one end of the mounting block, and the two ends of the second driving member are rotatably connected to the mounting block and the first chuck, respectively.

[0015] By adopting the above technical solution, by setting up an installation block, a first clamp, and a second driving component, the second driving component drives the first clamp to rotate, so as to clamp and fix one side of the lower end of the front plate.

[0016] Preferably, the first clamping assembly further includes a third driving member, the mounting block is slidably connected to the inner clamping plate in a vertical direction, and the third driving member is disposed on the inner clamping plate and used for the sliding of the mounting block.

[0017] By adopting the above technical solution and setting a third driving component, the position of the mounting block can be adjusted to ensure that the first chuck can stably clamp the front plate.

[0018] Preferably, the second clamping assembly includes a second clamp and a fourth driving member, the second clamp being rotatably connected to the upper end of the inner clamping plate, and the two ends of the fourth driving member being rotatably connected to the inner clamping plate and the second clamp, respectively.

[0019] By adopting the above technical solution, by setting a second clamp and a fourth driving member, the fourth driving member drives the second clamp to rotate, so as to clamp and fix the upper end of the front plate.

[0020] Preferably, the first clamping assembly includes a mounting block, a first chuck, a first connecting strip, and an elastic element. The mounting block is disposed at the lower end of the inner clamping plate. The first chuck is rotatably connected to one end of the mounting block. The first connecting strip is slidably connected to the mounting block. One end of the first connecting strip is rotatably connected to the first chuck, and the other end is disposed on a first guide surface. The elastic element is disposed between the mounting block and the first connecting strip to drive the first connecting strip away from the first chuck. The second clamping assembly includes a second clamp and a second connecting bar. The second clamp is rotatably connected to the upper end of the inner clamping plate, and the second connecting bar is slidably connected to the inner clamping plate. The upper end of the second connecting bar is rotatably connected to the second clamp and the lower end is provided with a second guide surface. The second connecting bar has a movable groove in the vertical direction, and the first connecting bar is movably inserted through the movable groove. The driving mechanism includes a driving bar, which is disposed on the outer clamping plate that is slidably connected to the rotating frame, and the driving bar cooperates with the second guide surface to drive the second connecting bar to slide upward, thereby causing the first connecting bar to slide towards the end closer to the elastic member.

[0021] By adopting the above technical solution, in practical applications, the outer clamping plate slides to drive the drive bar to move, so that the drive bar abuts against the second guide surface of the second connecting bar, so that the second connecting bar moves upward to drive the second chuck to rotate and clamp and fix the upper end of the front plate. At the same time, the first connecting bar, which is movably inserted through the movable groove, slides towards the end closer to the elastic member under the action of the first guide surface, so as to drive the first chuck to rotate and clamp and fix one side of the lower end of the front plate.

[0022] Preferably, the drive mechanism further includes two abutment blocks, which are disposed on the upper side of the drive bar and are used to simultaneously abut against the two second guide surfaces.

[0023] By adopting the above technical solution and setting two abutment blocks, the two first clamping components and the two second clamping components work synchronously to improve the stability of clamping and fixing the air box.

[0024] Secondly, this application provides a welding device.

[0025] The welding equipment provided in this application adopts the following technical solution: A welding apparatus, comprising the welding clamping device described above.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. After the two side plates are pre-welded and fixed to the front plate by spot welding, the pre-welded air box is transported to the two inner clamping plates by a gantry crane, so that the front plate overlaps the upper end of the two inner clamping plates. Then, the second drive assembly drives the outer clamping plate to slide, so as to move the pre-welded air box, so that the two side plates abut against the two outer clamping plates respectively, and the lower end of the side plates overlaps the limiting post. The first clamping assembly and the second clamping assembly work to clamp and fix one side of the lower end of the front plate to the upper end, which can ensure the limiting effect of the front plate and the two side plates. At the same time, the first drive assembly drives the rotating frame to rotate, which can adjust the position between the air box and the welding robot. The operation is simple and convenient, thereby effectively improving the welding effect of the air box. 2. By setting up an installation block, a first clamp, and a second driving component, the second driving component drives the first clamp to rotate, thereby clamping and fixing one side of the lower end of the front plate; 3. By sliding the outer clamping plate, the drive bar is moved so that it abuts against the second guide surface of the second connecting bar, so that the second connecting bar moves upward, thereby driving the second chuck to rotate and clamp and fix the upper end of the front plate. At the same time, the first connecting bar, which is movably inserted through the movable groove, slides towards the end closer to the elastic member under the action of the first guide surface, thereby driving the first chuck to rotate and clamp and fix one side of the lower end of the front plate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the air box in the background art; Figure 2 This is a schematic diagram of the overall structure of the welding clamping device in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the welding clamping device holding the gas box in Embodiment 1 of this application; Figure 4 This is a partial structural diagram of the welding clamping device in Embodiment 1 of this application; Figure 5 This is a partial structural diagram of the welding clamping device in Embodiment 1 of this application; Figure 6 This is a partial structural diagram of the welding clamping device in Embodiment 2 of this application; Figure 7 This is a partial structural diagram of the welding clamping device in Embodiment 2 of this application.

[0028] Reference numerals: 1. Frame; 11. Base; 12. Rotating frame; 2. External clamping mechanism; 21. External clamping plate; 22. Limiting post; 23. Sliding seat; 24. Third drive assembly; 241. Lead screw; 242. First drive component; 25. Abutment post; 3. Internal clamping mechanism; 31. Internal clamping plate; 32. First clamping assembly; 321. Mounting block; 322. First chuck; 323. Second drive component; 324. Third drive component; 325. First connecting bar; 325a. First guide. 326. Elastic element; 33. Second clamping assembly; 331. Second chuck; 332. Fourth driving element; 333. Second connecting bar; 333a. Second guide surface; 333b. Movable groove; 4. Drive mechanism; 41. First driving assembly; 411. Rotary motor; 412. Reducer; 42. Second driving assembly; 421. Sliding motor; 422. Gear; 423. Rack; 424. Drive bar; 425. Abutment block; 5. Air box; 51. Front plate; 52. Side plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0030] This application discloses a welding clamping device for a gas box.

[0031] Example 1: Reference Figure 2 The welding clamping device includes a frame 1, two external clamping mechanisms 2, two internal clamping mechanisms 3, and a drive mechanism 4. The frame 1 includes a base 11 and a rotating frame 12. The base 11 is placed on the ground, and one end of the rotating frame 12 is rotatably connected to the base 11.

[0032] Reference Figure 2 and Figure 3 The outer clamping mechanism 2 includes an outer clamping plate 21 and a limiting post 22. The two outer clamping plates 21 are spaced apart along the length of the rotating frame 12. One outer clamping plate 21 is fixedly connected to one end of the rotating frame 12, and the other outer clamping plate 21 is slidably connected to the rotating frame 12 in the length direction of the rotating frame 12. The limiting post 22 is fixedly connected to the inner side of the outer clamping plate 21, that is, the side where the two outer clamping plates 21 are close to each other. There are two limiting posts 22, which are spaced apart along the width direction of the outer clamping plate 21.

[0033] The inner clamping mechanism 3 includes an inner clamping plate 31, a first clamping component 32, and a second clamping component 33. The two inner clamping plates 31 are spaced apart along the length of the rotating frame 12 and located between the two outer clamping plates 21. The first clamping component 32 and the second clamping component 33 are respectively installed at the upper and lower ends of the inner clamping plate 31 to achieve clamping and fixing of the front plate 51.

[0034] Reference Figure 4 The drive mechanism 4 includes a first drive assembly 41 and a second drive assembly 42. The first drive assembly 41 is mounted on the base 11. Specifically, the first drive assembly 41 includes a rotary motor 411 and a reducer 412. The rotary motor 411 and the reducer 412 are fixedly connected in the base 11. The input end of the reducer 412 is connected to the power output shaft of the rotary motor 411, and the output end of the reducer 412 is connected to the rotating frame 12 to drive the rotating frame 12 to rotate. The second drive assembly 42 includes a sliding motor 421, a gear 422, and a rack 423. The sliding motor 421 is fixedly connected to the outer clamping plate 21. The gear 422 is fixedly connected to the power output shaft of the sliding motor 421. The rack 423 is fixedly connected to the rotating frame 12 and is arranged along the length direction of the rotating frame 12. The gear 422 and the rack 423 mesh. When the sliding motor 421 works, it drives the gear 422 to rotate, thereby driving the outer clamping plate 21 to slide.

[0035] In practical applications, after the two side plates 52 are pre-welded and fixed to the front plate 51 by spot welding, the pre-welded air box 5 is transported to the two inner clamping plates 31 by a gantry crane, so that the front plate 51 overlaps the upper end of the two inner clamping plates 31. Then, the sliding motor 421 works, and the outer clamping plate 21 is driven to slide under the cooperation of the gear 422 and the rack 423 to move the pre-welded air box 5, so that the two side plates 52 respectively abut against the two outer clamping plates 21, and the lower end of the side plates 52 overlaps the limiting post 22. The first clamping component 32 and the second clamping component 33 work to clamp and fix one side of the lower end and the upper end of the front plate 51, which can ensure the limiting effect of the front plate 51 and the two side plates 52. At the same time, the rotating frame 12 is driven to rotate by the rotation motor 411 and the reducer 412, which can adjust the position between the air box 5 and the welding robot. The operation is simple and convenient, thereby effectively improving the welding effect of the air box 5.

[0036] Reference Figure 5 In some embodiments, the outer clamping mechanism 2 further includes a sliding seat 23 and a third drive assembly 24. The sliding seat 23 is slidably connected to the outer clamping plate 21 in a vertical direction. Two limiting posts 22 are fixedly connected to the sliding seat 23. The third drive assembly 24 is mounted on the outer clamping plate 21 and is used to drive the sliding seat 23 to slide. The third drive assembly 24 drives the sliding seat 23 to slide, thereby changing the position of the limiting posts 22. By changing the height of the limiting posts 22, the welding clamping device can be adapted to gas boxes 5 of different sizes, thus improving the applicability of the welding clamping device.

[0037] In some embodiments, the third drive assembly 24 includes a lead screw 241 and a first drive member 242. The lead screw 241 is arranged in a vertical direction, and its two ends are rotatably connected to the outside of the outer clamping plate 21 and threaded with the sliding seat 23. The first drive member 242 is a motor, which is fixedly connected to the outer clamping plate 21 and its power output shaft is connected to the lead screw 241 to drive the lead screw 241 to rotate so that the sliding seat 23 can slide. The structure is simple and the operation is stable.

[0038] In some embodiments, the outer clamping mechanism 2 further includes an abutment post 25, which is fixedly connected to the outer clamping plate 21 on one side of the limiting post 22. The abutment post 25 replaces the outer clamping plate 21 and abuts against the side plate 52, so that there is a certain gap between the side plate 52 and the outer clamping plate 21, so that the welding robot can be inserted, that is, to provide welding space for the welding robot.

[0039] In some embodiments, the first clamping assembly 32 includes a mounting block 321, a first chuck 322, and a second driving member 323. The mounting block 321 is mounted on the lower end of the inner clamping plate 31. The first chuck 322 is rotatably connected to one end of the mounting block 321. The second driving member 323 is a cylinder, but in other embodiments it can also be a hydraulic cylinder, an electric push cylinder, etc., which is not limited in this application. The cylinder body of the second driving member 323 is rotatably connected to the mounting block 321, and the power output shaft of the second driving member 323 is rotatably connected to the first chuck 322. The second driving member 323 operates to extend and retract the power output shaft, thereby driving the first chuck 322 to rotate, so that the first chuck 322 abuts against one side of the lower end of the front plate 51, thereby clamping and fixing one side of the lower end of the front plate 51.

[0040] In some embodiments, the first clamping assembly 32 further includes a third driving member 324. The mounting block 321 is slidably connected to the inner clamping plate 31 in a vertical direction. The third driving member 324 may be, but is not limited to, a cylinder, a hydraulic cylinder, an electric push cylinder, etc. The cylinder body of the third driving member 324 is fixedly connected to the inner clamping plate 31, and the power output shaft of the third driving member 324 is fixedly connected to the mounting block 321 to drive the mounting block 321 to slide, so as to adjust the height position of the mounting block 321 and ensure that the first chuck 322 of different sized air boxes 5 can stably clamp the front plate 51.

[0041] In some embodiments, the second clamping assembly 33 includes a second chuck 331 and a fourth drive member 332. The second chuck 331 is rotatably connected to the upper end of the inner clamping plate 31. The fourth drive member 332 may be, but is not limited to, a cylinder, a hydraulic cylinder, an electric push cylinder, etc. The cylinder body of the fourth drive member 332 is rotatably connected to the inner clamping plate 31, and the power output shaft of the fourth drive member 332 is rotatably connected to the second chuck 331 to drive the second chuck 331 to rotate, so as to clamp and fix the upper end of the front plate 51.

[0042] The implementation principle of this embodiment is as follows: In practical application, after the two side plates 52 are pre-welded and fixed to the front plate 51 by spot welding, the pre-welded air box 5 is transported to the two inner clamping plates 31 by a gantry crane, so that the front plate 51 overlaps the upper end of the two inner clamping plates 31. Then, the sliding motor 421 works, and the outer clamping plate 21 is driven to slide under the cooperation of the gear 422 and the rack 423, so as to move the pre-welded air box 5, so that the two side plates 52 respectively abut against the front plate 51. Two outer clamping plates 21 are provided, and the lower end of the side plate 52 overlaps with the limiting post 22. The first clamping component 32 and the second clamping component 33 work to clamp and fix one side of the lower end and the upper end of the front plate 51, which can ensure the limiting effect of the front plate 51 and the two side plates 52. At the same time, by rotating the motor 411 and the reducer 412 to drive the rotating frame 12 to rotate, the position between the air box 5 and the welding robot can be adjusted. The operation is simple and convenient, thereby effectively improving the welding effect of the air box 5.

[0043] Example 2: Reference Figure 6 and Figure 7 This embodiment is identical to Embodiment 1 in all other aspects, except that the structures of the first clamping assembly 32 and the second clamping assembly 33 are different. Specifically, the first clamping assembly 32 includes a mounting block 321, a first clamp 322, a first connecting strip 325, and an elastic element 326. The mounting block 321 is fixedly connected to the lower end of the inner clamping plate 31. The first clamp 322 is rotatably connected to one end of the mounting block 321. The first connecting strip 325 is slidably connected to the mounting block 321 in the width direction of the inner clamping plate 31. One end of the first connecting strip 325 is rotatably connected to the first clamp 322, and the lower side of the other end is provided with a first guide surface 325a. The elastic element 326 is a spring, and both ends of the elastic element 326 are fixedly connected to the mounting block 321 and the first connecting strip 325, respectively, to drive the first connecting strip 325 away from the first clamp 322.

[0044] The second clamping assembly 33 includes a second clamp 331 and a second connecting bar 333. The second clamp 331 is rotatably connected to the upper end of the inner clamping plate 31, and the second connecting bar 333 is slidably connected to the inner clamping plate 31 in a vertical direction. The upper end of the second connecting bar 333 is rotatably connected to the second clamp 331, and the lower end of the second connecting bar 333 is provided with a second guide surface 333a. At the same time, the second connecting bar 333 is provided with a movable groove 333b in a vertical direction, and the first connecting bar 325 is movably inserted through the movable groove 333b.

[0045] The drive mechanism 4 includes a drive bar 424, which is fixedly connected to the outer clamping plate 21 that is slidably connected to the rotating frame 12. The drive bar 424 cooperates with the second guide surface 333a. That is, during the movement of the drive bar 424, the second connecting bar 333 moves upward under the guidance of the second guide surface 333a. At this time, the bottom wall of the movable groove 333b abuts against the first guide surface 325a to drive the first connecting bar 325 to slide towards the end closer to the elastic member 326.

[0046] In practical applications, the outer clamping plate 21 slides to move the drive bar 424, causing it to abut against the second guide surface 333a of the second connecting bar 333. This causes the second connecting bar 333 to move upward, driving the second chuck 331 to rotate and clamp the upper end of the front plate 51. Simultaneously, the first connecting bar 325, which is movably inserted through the movable groove 333b, slides towards the end closer to the elastic member 326 under the action of the first guide surface 325a, driving the first chuck 322 to rotate and clamp one side of the lower end of the front plate 51. This design allows for clamping and fixing both the upper end and one side of the lower end of the front plate 51 during the movement of the air box 5. Compared to the first embodiment, this saves time in clamping and fixing the air box 5, thus improving work efficiency. Furthermore, it eliminates the need for additional drive components, such as the second drive component 323 and the fourth drive component 332 in the first embodiment, reducing production costs. More importantly, the first clamping component 32 and the second clamping component 33 of the inner clamping mechanism 3 work synchronously to improve the stability of clamping the air box 5.

[0047] In some embodiments, the drive mechanism 4 further includes two abutment blocks 425, which are fixedly connected to the upper side of the drive bar 424. Each second connecting bar 333 overlaps the upper side of the drive bar 424. Each abutment block 425 cooperates with the second guide surface 333a of each second connecting bar 333. That is, during the movement of the drive bar 424, each abutment block 425 abuts against each second guide surface 333a, so that the two first clamping components 32 and the two second clamping components 33 work synchronously to improve the stability of clamping and fixing the air box 5.

[0048] This application also discloses a welding device.

[0049] The welding equipment includes a welding robot and the welding clamping device described in the above embodiments, with the welding robot located above the base 11.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding clamping device for a gas box, characterized in that, It includes a frame (1), two external clamping mechanisms (2), two internal clamping mechanisms (3) and a drive mechanism (4); the frame (1) includes a base (11) and a rotating frame (12); the rotating frame (12) is rotatably connected to the base (11); The external clamping mechanism (2) includes an external clamping plate (21) and a limiting post (22). The two external clamping plates (21) are spaced apart along the length of the rotating frame (12). One of the external clamping plates (21) is located at one end of the rotating frame (12), and the other external clamping plate (21) is slidably connected to the rotating frame (12) along the length of the rotating frame (12). The limiting post (22) is located on the inner side of the rotating frame (12). The inner clamping mechanism (3) includes an inner clamping plate (31), a first clamping component (32), and a second clamping component (33). The two inner clamping plates (31) are spaced apart along the length of the rotating frame (12) and located between the two outer clamping plates (21). The first clamping component (32) and the second clamping component (33) are respectively located between the inner clamping plates (31) and are used to clamp the front plate (51). The driving mechanism (4) includes a first driving component (41) and a second driving component (42); the first driving component (41) is used to drive the rotating frame (12) to rotate, and the second driving component (42) is used to drive the outer clamping plate (21) to slide.

2. The welding clamping device for a gas box according to claim 1, characterized in that, The external clamping mechanism (2) further includes a sliding seat (23) and a third driving component (24). The sliding seat (23) is slidably connected to the external clamping plate (21) in the vertical direction. The limiting post (22) is provided on the sliding seat (23). The third driving component (24) is provided on the external clamping plate (21) and is used to drive the sliding seat (23) to slide.

3. The welding clamping device for a gas box according to claim 2, characterized in that, The third drive assembly (24) includes a lead screw (241) and a first drive member (242). The lead screw (241) is rotatably connected to the outer clamping plate (21) and threadedly connected to the sliding seat (23). The first drive member (242) is disposed on the outer clamping plate (21) and is used to drive the lead screw (241) to rotate.

4. The welding clamping device for a gas box according to claim 1, characterized in that, The external clamping mechanism (2) further includes an abutment post (25), which is located on one side of the external clamping plate (21) and the limiting post (22).

5. The welding clamping device for a gas box according to claim 1, characterized in that, The first clamping assembly (32) includes a mounting block (321), a first chuck (322), and a second drive member (323). The mounting block (321) is located at the lower end of the inner clamping plate (31). The first chuck (322) is rotatably connected to one end of the mounting block (321). The two ends of the second drive member (323) are rotatably connected to the mounting block (321) and the first chuck (322), respectively.

6. The welding clamping device for a gas box according to claim 5, characterized in that, The first clamping assembly (32) further includes a third driving member (324), the mounting block (321) is slidably connected to the inner clamping plate (31) in the vertical direction, and the third driving member (324) is disposed on the inner clamping plate (31) and is used for the sliding of the mounting block (321).

7. The welding clamping device for a gas box according to claim 1, characterized in that, The second clamping assembly (33) includes a second clamp (331) and a fourth drive member (332). The second clamp (331) is rotatably connected to the upper end of the inner clamping plate (31), and the two ends of the fourth drive member (332) are rotatably connected to the inner clamping plate (31) and the second clamp (331), respectively.

8. The welding clamping device for a gas box according to claim 1, characterized in that, The first clamping assembly (32) includes a mounting block (321), a first chuck (322), a first connecting strip (325), and an elastic element (326). The mounting block (321) is located at the lower end of the inner clamping plate (31). The first chuck (322) is rotatably connected to one end of the mounting block (321). The first connecting strip (325) is slidably connected to the mounting block (321). One end of the first connecting strip (325) is rotatably connected to the first chuck (322), and the other end is located on the first guide surface (325a). The elastic element (326) is located between the mounting block (321) and the first connecting strip (325) to drive the first connecting strip (325) away from the first chuck (322). The second clamping assembly (33) includes a second clamp (331) and a second connecting bar (333). The second clamp (331) is rotatably connected to the upper end of the inner clamping plate (31). The second connecting bar (333) is slidably connected to the inner clamping plate (31). The upper end of the second connecting bar (333) is rotatably connected to the second clamp (331), and the lower end is provided with a second guide surface (333a). The second connecting bar (333) has a movable groove (333b) in the vertical direction. The first connecting bar (325) is movably inserted through the movable groove (333b). The driving mechanism (4) includes a driving bar (424), which is disposed on the outer clamping plate (21) that is slidably connected to the rotating frame (12). The driving bar (424) cooperates with the second guide surface (333a) to drive the second connecting bar (333) to slide upward, thereby driving the first connecting bar (325) to slide towards the end close to the elastic member (326).

9. The welding clamping device for a gas box according to claim 8, characterized in that, The drive mechanism (4) further includes two abutment blocks (425), which are located on the upper side of the drive bar (424) and are used to simultaneously abut against the two second guide surfaces (333a).

10. A welding device, characterized in that, Includes the welding clamping device as described in any one of claims 1-9.

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