A welding tooling for small-wall-thickness corrosion-resistant blind plates

Abstract

The present invention belongs to the technical field of blind plate welding, and specifically relates to a welding tooling for small-wall-thickness corrosion-resistant blind plates, which includes a frame body. A number of support plates are arranged inside the frame body, and a positioning block is slidably connected to each support plate; a switching component is arranged at the position corresponding to each positioning block inside the frame body. The switching component includes a rotating ring rotatably arranged above the frame body, a conical block is fixedly connected to the circumferential surface of the rotating ring, a support frame is fixedly connected to the inside of the frame body, a first rack plate is slidably connected to the top end of the support frame, a convex plate is fixedly connected to one end of the first rack plate, a connecting plate is fixedly connected to the other end of the first rack plate, and the connecting plate is fixedly connected to the positioning block. By setting the switching component and the protection component, the problems that the high temperature of the welding torch will cause the deformation of the blind plate and that the blind plate may be misaligned are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of blind plate welding, and specifically relates to a welding tooling for small-wall-thickness corrosion-resistant blind plates. Background Art

[0002] Pipeline-type structural products are widely used in industries such as chemical engineering, oil and gas, coal mines, and construction. In production, common raw materials are used for surfacing to extend their service life, and production work is usually carried out by welding blind plate auxiliary equipment.

[0003] During the existing blind plate surfacing process, first, the blind plate to be welded is placed on the workbench, and then the worker holds a welding torch to weld the circular ring abutting portion between the blind plate and the bottom plate. During the welding process, after centering the blind plate and the bottom plate, the centering tool is removed, and then circumferential welding is carried out to uniformly melt the welding wire and fill it in the weld seam.

[0004] When carrying out the existing surfacing work, during the welding process of the welding torch, high temperature will be generated. Under the influence of the high temperature, the blind plate may be deformed, resulting in surfacing failure, and the welded blind plate cannot be put into work, thus resulting in poor production quality. At the same time, the production efficiency cannot be improved. In addition, during the welding process, the blind plate is not effectively fixed. After centering is completed, during the welding process of the welding torch, there will be a certain impact force of gas (rare gas), which may cause a certain dislocation of the blind plate, and then lead to the problem of dislocation of the subsequent welding position.

[0005] Therefore, the present invention provides a welding tooling for small-wall-thickness corrosion-resistant blind plates. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A welding tooling for small-wall-thickness corrosion-resistant blind plates according to the present invention includes a frame body, and a plurality of support plates are arranged inside the frame body. Each support plate is slidably connected with a positioning block;

[0008] A switching assembly is arranged at the position corresponding to each positioning block inside the frame body. The switching assembly includes a rotating ring rotatably arranged above the frame body. A conical block is fixedly connected to the circumferential surface of the rotating ring. A support frame is fixedly connected inside the frame body. The top end of the support frame is slidably connected with a first rack plate. One end of the first rack plate is fixedly connected with a convex plate, and the other end of the first rack plate is fixedly connected with a connecting plate. The connecting plate is fixedly connected with the positioning block;

[0009] The first rack plate is drivingly connected to a protection component, which is used to protect the weld after welding and limit the blind plate. The protection component includes an arc-shaped protection ring slidably arranged above the positioning block.

[0010] Preferably, a limiting ring is fixedly connected to the inner wall of the rotating ring, and one end of the limiting ring is rotatably connected to an auxiliary ring for limiting the position of the welding gun.

[0011] Preferably, when the cone block on the circumferential surface of the rotating ring abuts against the convex plate at one end of the first rack plate and performs extrusion, the cone block pushes the convex plate to move, and the convex plate drives the first rack plate to slide. The sliding of the first rack plate drives one of the positioning blocks to disengage from the blind plate, and the rotating ring drives the welding gun to perform welding, that is, after the positioning block is disengaged, the welding gun starts welding, and when the welding completes the same arc length as the arc protection ring, the arc protection ring of the protective assembly moves to the position where the welding is completed, and the arc protection ring covers the weld, and the cone block continues to move and disengages from the convex plate.

[0012] Preferably, the protection component includes a rotating shaft rotatably arranged inside the frame, a first gear is fixedly connected to the top of the rotating shaft, a second gear is fixedly connected to the middle of the rotating shaft, a second gear is meshed with a second rack plate, a positioning frame is fixedly connected to the position of the frame corresponding to the second rack plate, the second rack plate is slidably arranged on one side of the positioning frame, one end of the second rack plate is fixedly connected to a limiting frame, a sliding groove is opened in the limiting frame, an auxiliary plate is slidably connected in the sliding groove, a compression spring is fixedly connected to the upper surface of the auxiliary plate, the compression spring is fixedly connected to the limiting frame, and the bottom end of the auxiliary plate is fixedly connected to the arc-shaped protective ring.

[0013] Preferably, a fixed cavity is opened inside the arc-shaped protection ring, and the fixed cavity is used to cover the weld without directly contacting the weld.

[0014] Preferably, before the cone block and the convex plate are about to separate, the arc protection ring moves to the weld. At this time, the arc protection ring is located directly above the weld. Under the elastic force of the compression spring, the arc protection ring is driven to slide along the sliding groove, and then abuts against the arc surface of the blind plate to limit the position, while covering the weld.

[0015] Preferably, a cooling assembly is provided on the upper surface of the auxiliary plate, and the cooling assembly includes a positioning box fixedly connected to the upper surface of the limit frame, and a blower is provided on the upper surface of the positioning frame. When the arc-shaped protection ring elastically moves downward to protect the weld, the auxiliary plate moves downward to connect the fixed cavity with the positioning box, that is, the cold air from the blower can enter the fixed cavity to cool the weld.

[0016] Preferably, the cooling assembly includes a first telescopic tube fixedly connected to one side of the blower. The first telescopic tube is fixedly connected to the positioning box. A connection hole is provided in the positioning box. The upper surface of the auxiliary plate is fixedly connected to a second telescopic tube and a partition plate. The partition plate is inserted into the positioning box, and positioning holes are provided on the surface of the partition plate.

[0017] Preferably, when the arc-shaped protective ring moves downward, it drives the second telescopic tube to expand and contract, and at the same time drives the partition plate to move downward, so that the positioning hole communicates with the connection hole, and then the cold air blown by the blower enters the fixed cavity to cool the weld.

[0018] Preferably, the switching components are distributed in a circumferential array on the circumference of the blind plate, and the arc-shaped protective rings are switched one by one to protect the welded welds, and at the same time, the blind plate is always limited.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. For the small-wall-thickness corrosion-resistant blind plate welding tooling of the present invention, the rotation of the welding torch drives the rotation of the rotating ring, and the conical blocks fixedly connected to its circumferential surface rotate accordingly. As the conical blocks rotate, they contact the convex plate at one end of the first rack plate and generate a thrust, pushing the first rack plate to slide on the top of the support frame. Since the other end of the first rack plate is fixedly connected to the positioning block through a connecting plate, the positioning block will slide on the support plate, realizing the separation of the limited blind plate. After the blind plate is separated, the welding torch performs welding work along the circumference of the blind plate. When the same arc length as the arc-shaped protective ring is welded, at this time, the arc-shaped protective ring of the protection assembly moves to the welded position, and the arc-shaped protective ring covers the weld. The conical block continues to move and disengages from the convex plate. At the same time, the sliding of the first rack plate will be transmitted to drive the connected protection assembly. The arc-shaped protective ring in the protection assembly is slidably arranged above the positioning block. Driven by the transmission of the first rack plate, the arc-shaped protective ring moves to the weld position to protect the welded weld from being damaged by the water in the external frame body. Moreover, the arc-shaped protective ring can also limit the blind plate to prevent the blind plate from shifting during the welding process, ensuring the welding accuracy and quality. Then, the convex plate is pushed in turn to protect the weld while keeping the blind plate limited, effectively improving the welding quality and product stability.

[0021] 2. The small-wall-thickness corrosion-resistant blind plate welding tooling described in the present invention is conveyed into the positioning box through the first telescopic pipe. As the fixed cavity communicates with the positioning box, the cold air then enters the fixed cavity through the second telescopic pipe, thereby cooling the weld seam in the fixed cavity. On the one hand, while the arc-shaped protective ring protects the weld seam, the weld seam can be cooled in a timely manner, effectively avoiding quality problems of the weld seam due to high-temperature residue and improving the welding quality. On the other hand, the movement of the auxiliary plate drives the change of the position of the partition plate, realizing the precise delivery of cold air. The structure is simple, the operation is convenient, no additional complex control device is required, the equipment cost and maintenance difficulty are reduced, and the efficiency and stability of the entire welding process are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 is a perspective view of Embodiment 1 of the present invention;

[0024] Figure 2 is a schematic structural diagram of the frame body of the present invention;

[0025] Figure 3 is a schematic structural diagram of the switching component of the present invention;

[0026] Figure 4 is a schematic structural relationship diagram of the second gear and the first gear of the present invention;

[0027] Figure 5 is a schematic structural diagram of the cooling component of the present invention;

[0028] Figure 6 is a sectional view of the cooling component of the present invention.

[0029] In the figure: 1. Frame body;

[0030] 2. Support plate; 21. Positioning block;

[0031] 3. Rotating ring; 31. Cone block; 32. Limiting ring; 33. Auxiliary ring;

[0032] 4. Support frame; 41. First rack plate; 42. Convex plate; 43. Connecting plate; 44. First gear; 45. Rotating shaft; 46. Second gear; 47. Second rack plate; 48. Positioning frame; 49. Limiting frame; 410. Arc-shaped protective ring; 411. Fixed cavity; 412. Blower; 413. First telescopic pipe; 414. Positioning box; 415. Partition plate; 416. Positioning hole; 417. Connecting hole; 418. Second telescopic pipe; 419. Auxiliary plate; 420. Compression spring; 421. Sliding groove. DETAILED DESCRIPTION OF THE INVENTION

[0033] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0034] Embodiment 1: As Figures 1 to 6 shown, a small-wall-thickness corrosion-resistant blind plate welding tooling according to an embodiment of the present invention includes a frame body 1. A plurality of support plates 2 are arranged inside the frame body 1. A positioning block 21 is slidably connected to each support plate 2; a switching assembly is arranged at the position corresponding to each positioning block 21 inside the frame body 1. The switching assembly includes a rotating ring 3 rotatably arranged above the frame body 1. A conical block 31 is fixedly connected to the circumferential surface of the rotating ring 3. A support frame 4 is fixedly connected to the inside of the frame body 1. The top end of the support frame 4 is slidably connected to a first rack plate 41. One end of the first rack plate 41 is fixedly connected to a convex plate 42. The other end of the first rack plate 41 is fixedly connected to a connecting plate 43. The connecting plate 43 is fixedly connected to the positioning block 21; the first rack plate 41 is drivingly connected to a protection assembly. The protection assembly is used for protecting the weld seam after welding and at the same time limiting the blind plate. The protection assembly includes an arc-shaped protection ring 410 slidably arranged above the positioning block 21.

[0035] Specifically, during the existing surfacing work, when the welding torch is performing welding work, high temperature will be generated. Under the influence of the high temperature, the blind plate may be deformed, resulting in surfacing failure, and the welded blind plate cannot be put into work, thus resulting in poor production quality. At the same time, the production efficiency cannot be improved. In addition, during the welding process, the blind plate is not effectively fixed. After the centering is completed, during the welding process of the welding torch, there will be a certain gas (rare gas) impact force, which may cause the blind plate to be misaligned to a certain extent, and then cause the subsequent welding position to be misaligned;

[0036] Therefore, the present invention solves the above problems by setting corresponding structures. First, before the welding work is carried out, the welding torch is abutted against the rotating ring 3, and the rotating ring 3 is temporarily fixed to the welding torch. Then, the rotation of the welding torch drives the rotating ring 3 to rotate. The conical block 31 fixedly connected to its circumferential surface rotates accordingly. As the conical block 31 rotates, it contacts the convex plate 42 at one end of the first rack plate 41 and generates a thrust force, pushing the first rack plate 41 to slide on the top end of the support frame 4. Since the other end of the first rack plate 41 is fixedly connected to the positioning block 21 through the connecting plate 43, the positioning block 21 will slide on the support plate 2, realizing the blind plate that is released from the limit. After the blind plate is released, the welding torch performs welding work along the circumference of the blind plate. In addition, during the welding process, water is stored in the box on one side of the frame body 1. The water flows into the inside of the frame body 1 through the water inlet pipe. Then, during the welding process, the water in the frame body 1 contacts the bottom plate, thereby cooling the welding of the blind plate. And when the water flows into the frame body 1, the water in the frame body 1 also flows out from the water outlet pipe, so that the water is continuously circulated, avoiding the overall temperature of the water in the frame body 1 rising during the long-term welding process, resulting in a reduction in the cooling effect;

[0037] When the arc length same as that of the arc-shaped protection ring 410 is welded, at this time, the arc-shaped protection ring 410 of the protection component moves to the welded position, and the arc-shaped protection ring 410 covers the weld seam. The conical block 31 continues to move and disengages from the convex plate 42. At the same time, the sliding of the first rack plate 41 drives the protection component connected thereto. The arc-shaped protection ring 410 in the protection component is slidably arranged above the positioning block 21. Driven by the transmission of the first rack plate 41, the arc-shaped protection ring 410 moves to the weld seam position to protect the welded weld seam from being damaged by the water in the external frame body 1. Moreover, the arc-shaped protection ring 410 can also limit the position of the blind plate to prevent the blind plate from shifting during the welding process, ensuring the welding accuracy and quality. Then, the convex plate 42 is pushed in sequence, which can protect the weld seam while keeping the blind plate limited, effectively improving the welding quality and product stability;

[0038] It solves the problem that the high temperature of the welding torch will cause the deformation of the blind plate, and at the same time solves the problem that the blind plate may be misaligned.

[0039] As Figure 3 shown, a limiting ring 32 is fixedly connected to the inner wall of the rotating ring 3 in this embodiment. One end of the limiting ring 32 is rotatably connected to an auxiliary ring 33 for limiting the welding torch.

[0040] As Figure 4 shown, the protection component in this embodiment includes a rotating shaft 45 rotatably arranged inside the frame body 1. A first gear 44 is fixedly connected to the top end of the rotating shaft 45, and a second gear 46 is fixedly connected to the middle part of the rotating shaft 45. The second gear 46 meshes with a second rack plate 47. A positioning frame 48 is fixedly connected to the frame body 1 corresponding to the position of the second rack plate 47. The second rack plate 47 is slidably arranged on one side of the positioning frame 48. One end of the second rack plate 47 is fixedly connected to a limiting frame 49. A sliding groove 421 is formed in the limiting frame 49. An auxiliary plate 419 is slidably connected in the sliding groove 421. A compression spring 420 is fixedly connected to the upper surface of the auxiliary plate 419. The compression spring 420 is fixedly connected to the limiting frame 49. The bottom end of the auxiliary plate 419 is fixedly connected to the arc-shaped protection ring 410. A fixing cavity 411 is formed inside the arc-shaped protection ring 410 for covering the weld seam without directly contacting the weld seam. Before the conical block 31 and the convex plate 42 are about to disengage, the arc-shaped protection ring 410 moves to the weld seam. At this time, the arc-shaped protection ring 410 is located directly above the weld seam. Under the elastic force of the compression spring 420, the arc-shaped protection ring 410 is driven to slide along the sliding groove 421, and then abuts against the arc surface of the blind plate for limiting, and at the same time covers the weld seam.

[0041] Specifically, the second gear 46 is driven by the rotation of the rotating shaft 45, and then the second rack plate 47 is made to slide on the positioning frame 48, thereby driving the limit frame 49 to move. When the arc protection ring 410 moves to the position where the original positioning block 21 abuts the blind plate, the auxiliary plate 419 in the limit frame 49 drives the arc protection ring 410 to slide along the sliding groove 421 under the elastic force of the compression spring 420, abuts against the arc surface of the blind plate and covers the weld. Before the cone block 31 and the convex plate 42 are about to separate, the arc protection ring 410 can be moved to the top of the weld in time, effectively protecting the weld from external interference, avoiding damage to the weld caused by collision, friction, etc., ensuring the welding quality, and improving the stability and reliability of the overall welding work.

[0042] Embodiment 2: Figures 1 to 6 As shown, compared with Example 1, another embodiment of the present invention is: a cooling assembly is arranged on the upper surface of the auxiliary plate 419, and the cooling assembly includes a positioning box 414 fixedly connected to the upper surface of the limit frame 49, and a blower 412 is arranged on the upper surface of the positioning frame 48. When the arc protection ring 410 elastically moves downward to protect the weld, the auxiliary plate 419 moves downward to connect the fixed cavity 411 with the positioning box 414, that is, the cold air of the blower 412 can enter the fixed cavity 411 to cool the weld, and the cooling assembly includes a first telescopic tube 413 fixedly connected to one side of the blower 412, the first telescopic tube 413 is fixedly connected to the positioning box 414, and a connecting hole 417 is opened in the positioning box 414, and a second telescopic tube 418 and a partition 415 are fixedly connected to the upper surface of the auxiliary plate 419, and the partition 415 is inserted into the positioning box 414, and a positioning hole 416 is opened on the surface of the partition 415.

[0043] Specifically, when the arc protection ring 410 moves downward due to elasticity to protect the weld, the auxiliary plate 419 also moves downward. Since the auxiliary plate 419 is fixedly connected with the partition 415, and the partition 415 is inserted into the positioning box 414, the downward movement of the auxiliary plate 419 drives the partition 415 to change its position in the positioning box 414. The positioning box 414 and the fixed cavity 411 are originally blocked by the partition 415. At this time, the positioning hole 416 on the partition 415 is gradually connected with the connecting hole 417 in the positioning box 414, so that the fixed cavity 411 and the positioning box 414 are connected. 14, the blower 412 on the positioning frame 48 keeps working, and the generated cold air is transported to the positioning box 414 through the first telescopic tube 413. As the fixed cavity 411 is connected with the positioning box 414, the cold air enters the fixed cavity 411 through the second telescopic tube 418, thereby cooling the weld in the fixed cavity 411. On the one hand, the arc protection ring 410 can protect the weld and cool the weld in time, effectively avoiding the quality problem of the weld due to high temperature residue, thereby improving the welding quality;

[0044] And because high temperatures are generated during the welding process, when cooling the blind plate welding through the water inside the frame, the high temperature generated by the blind plate welding will cause the water to vaporize when it comes into contact with the water. The water mist of the water vapor will cause the humidity to increase around the blind plate. Therefore, the delivery of cold air can push the water mist around the blind plate into the surrounding environment, ensuring the welding environment and indirectly improving the welding quality. On the other hand, the movement of the auxiliary plate 419 is used to drive the change in the position of the partition plate 415, realizing the precise delivery of cold air. The structure is simple and the operation is convenient. There is no need for additional complex control devices, reducing the equipment cost and maintenance difficulty, and improving the efficiency and stability of the entire welding process.

[0045] As Figure 1 shown, in this embodiment, the switching components are arranged in a circumferential array around the circumference of the blind plate, and the arc-shaped protective rings 410 are switched one by one to protect the welded welds, while always maintaining the limit on the blind plate.

[0046] Working principle: First, before welding, the welding torch is abutted against the rotating ring 3, and the rotating ring 3 is temporarily fixed to the welding torch. Then, the rotation of the welding torch drives the rotation of the rotating ring 3, and the conical block 31 fixedly connected to its circumferential surface rotates accordingly. As the conical block 31 rotates, it contacts the convex plate 42 at one end of the first rack plate 41 and generates a thrust, pushing the first rack plate 41 to slide on the top of the support frame 4. Since the other end of the first rack plate 41 is fixedly connected to the positioning block 21 through the connecting plate 43, the positioning block 21 will slide on the support plate 2, realizing the blind plate that is released from the limit. After the blind plate is released, the welding torch performs welding work along the circumference of the blind plate. When the same arc length as the arc-shaped protective ring 410 is welded, at this time, the arc-shaped protective ring 410 of the protection component moves to the welded position, and the arc-shaped protective ring 410 covers the weld. The conical block 31 continues to move and disengages from the convex plate 42. At the same time, the sliding of the first rack plate 41 will drive the transmission, driving the connected protection component. The arc-shaped protective ring 410 in the protection component is slidably arranged above the positioning block 21. Driven by the transmission of the first rack plate 41, the arc-shaped protective ring 410 moves to the weld position to protect the welded weld from being damaged by the water inside the external frame 1. Moreover, the arc-shaped protective ring 410 can also play a role in limiting the blind plate, preventing the blind plate from shifting during the welding process and ensuring the precision and quality of the welding. Then, the convex plate 42 is pushed in sequence, protecting the weld while maintaining the limit on the blind plate, effectively improving the welding quality and product stability;

[0047] Specifically, the first rack plate 41 drives the rotation of the rotating shaft 45, which in turn drives the second gear 46. The second gear 46 drives the second rack plate 47 to slide on the positioning frame 48, thereby driving the limit frame 49 to move. When the arc-shaped protection ring 410 moves to the position where the original positioning block 21 abuts against the blind plate, the auxiliary plate 419 in the limit frame 49 drives the arc-shaped protection ring 410 to slide along the sliding groove 421 under the elastic force of the compression spring 420, abuts against the arc surface of the blind plate for limiting, and covers the weld seam. It can move the arc-shaped protection ring 410 to directly above the weld seam in time before the tapered block 31 and the convex plate 42 are about to separate, effectively protecting the weld seam from external interference, avoiding damage to the weld seam caused by collision, friction, etc., ensuring the welding quality, and improving the stability and reliability of the overall welding work;

[0048] In addition, when the arc-shaped protection ring 410 moves downward due to elastic action to protect the weld seam, the auxiliary plate 419 also moves downward accordingly. Since the partition plate 415 is fixedly connected to the auxiliary plate 419 and the partition plate 415 is inserted into the positioning box 414, the downward movement of the auxiliary plate 419 drives the partition plate 415 to change its position in the positioning box 414. Originally, the positioning box 414 and the fixed cavity 411 were blocked by the partition plate 415. At this time, the positioning hole 416 on the partition plate 415 and the connection hole 417 in the positioning box 414 are gradually connected, forming a passage between the fixed cavity 411 and the positioning box 414. The blower 412 on the positioning frame 48 continuously operates, and the generated cold air is delivered to the positioning box 414 through the first telescopic pipe 413. As the fixed cavity 411 and the positioning box 414 are connected, the cold air then enters the fixed cavity 411 through the second telescopic pipe 418, thereby cooling the weld seam in the fixed cavity 411. On the one hand, it can cool the weld seam in time while the arc-shaped protection ring 410 protects the weld seam, effectively avoiding quality problems of the weld seam due to high-temperature residue and improving the welding quality. On the other hand, the movement of the auxiliary plate 419 drives the change in the position of the partition plate 415 to achieve precise delivery of cold air. The structure is simple, the operation is convenient, no additional complex control device is required, the equipment cost and maintenance difficulty are reduced, and the efficiency and stability of the entire welding process are improved.

[0049] The above shows and describes 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 by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding tooling for a small-wall-thickness corrosion-resistant blind plate, comprising a frame body (1), characterized in that: A number of support plates (2) are arranged inside the frame body (1), and a positioning block (21) is slidably connected to each support plate (2); A switching component is arranged at the position corresponding to each positioning block (21) inside the frame body (1). A rotating ring (3) is rotatably arranged above the frame body (1), and a conical block (31) is fixedly connected to the circumferential surface of the rotating ring (3). The switching component includes a support frame (4) fixedly connected to the inside of the frame body (1). The top end of the support frame (4) is slidably connected to a first rack plate (41). One end of the first rack plate (41) is fixedly connected to a convex plate (42), and the other end of the first rack plate (41) is fixedly connected to a connecting plate (43). The connecting plate (43) is fixedly connected to the positioning block (21); The conical block (31) abuts against the convex plate (42) and can push the convex plate (42) to move; The first rack plate (41) is drivingly connected to a protection component. The protection component is used for protecting the weld after welding and at the same time limiting the blind plate. The protection component includes an arc-shaped protection ring (410) slidably arranged above the positioning block (21); A limiting ring (32) is fixedly connected to the inner wall of the rotating ring (3), and one end of the limiting ring (32) is rotatably connected to an auxiliary ring (33) for limiting the welding torch.

2. The small-wall-thickness corrosion-resistant blind plate welding tooling according to claim 1, characterized in that: When the conical block (31) on the circumferential surface of the rotating ring (3) abuts against and squeezes the convex plate (42) at one end of the first rack plate (41), the conical block (31) pushes the convex plate (42) to move. The convex plate (42) drives the first rack plate (41) to slide. The sliding of the first rack plate (41) drives one of the positioning blocks (21) to disengage from the blind plate, and the rotating ring (3) will drive the welding torch to perform welding work. That is, after the positioning block (21) disengages, the welding torch starts welding. When the same arc length as the arc-shaped protection ring (410) is welded, at this time, the arc-shaped protection ring (410) of the protection component moves to the welded position, and the arc-shaped protection ring (410) will cover the weld, and the conical block (31) continues to move and disengages from the convex plate (42).

3. The welding tooling for a small-wall-thickness corrosion-resistant blind plate according to claim 2, characterized in that: The protection component includes a rotating shaft (45) rotatably arranged inside the frame body (1). A first gear (44) is fixedly connected to the top end of the rotating shaft (45). A second gear (46) is fixedly connected to the middle of the rotating shaft (45). The second gear (46) meshes with a second rack plate (47). A positioning frame (48) is fixedly connected to the frame body (1) corresponding to the position of the second rack plate (47). The second rack plate (47) is slidably arranged on one side of the positioning frame (48). One end of the second rack plate (47) is fixedly connected to a limiting frame (49). A sliding groove (421) is opened in the limiting frame (49). An auxiliary plate (419) is slidably connected in the sliding groove (421). A compression spring (420) is fixedly connected to the upper surface of the auxiliary plate (419). The compression spring (420) is fixedly connected to the limiting frame (49). The bottom end of the auxiliary plate (419) is fixedly connected to the arc-shaped protection ring (410).

4. A small wall thickness corrosion-resistant blind plate welding tooling according to claim 3, characterized in that: A fixing cavity (411) is formed inside the arc-shaped protection ring (410). The fixing cavity (411) is used to cover the weld seam without directly contacting the weld seam.

5. The welding tooling for small-wall-thickness corrosion-resistant blind plates according to claim 3, characterized in that: Before the conical block (31) is about to separate from the convex plate (42), the arc-shaped protection ring (410) moves to the weld seam. At this time, the arc-shaped protection ring (410) is located directly above the weld seam. Under the elastic force of the compression spring (420), the arc-shaped protection ring (410) is driven to slide along the sliding groove (421), and then abuts against the arc surface of the blind plate for limiting, and at the same time covers the weld seam.

6. The welding tooling for a small-wall-thickness corrosion-resistant blind plate according to claim 4, characterized in that: A cooling assembly is arranged on the upper surface of the auxiliary plate (419). The cooling assembly includes a positioning box (414) fixedly connected to the upper surface of the limiting frame (49). A blower (412) is arranged on the upper surface of the positioning frame (48). When the arc-shaped protection ring (410) elastically moves downward to protect the weld seam, the auxiliary plate (419) moves downward to connect the fixing cavity (411) with the positioning box (414), that is, the cold air of the blower (412) can enter the fixing cavity (411) to cool the weld seam.

7. A welding tooling for small-wall-thickness corrosion-resistant blind plates according to claim 6, characterized in that: The cooling assembly further includes a first telescopic tube (413) fixedly connected to one side of the blower (412). The first telescopic tube (413) is fixedly connected to the positioning box (414). A connection hole (417) is formed inside the positioning box (414). A second telescopic tube (418) and a partition plate (415) are fixedly connected to the upper surface of the auxiliary plate (419). The partition plate (415) is inserted into the positioning box (414). A positioning hole (416) is formed on the surface of the partition plate (415).

8. A welding tooling for a small-wall-thickness corrosion-resistant blind plate according to claim 7, characterized in that: When the arc-shaped protection ring (410) moves downward, it drives the second telescopic tube (418) to expand and contract, and at the same time drives the partition plate (415) to move downward, so that the positioning hole (416) is communicated with the connection hole (417), and then the cold air blown out by the blower (412) is introduced into the fixing cavity (411) to cool the weld seam.

9. A welding tooling for small-wall-thickness corrosion-resistant blind plates according to claim 1, characterized in that: The switching components are distributed in a circumferential array on the circumference of the blind plate, and the arc-shaped protection rings (410) are switched one by one to protect the welded weld seams, and at the same time, the limiting of the blind plate is always maintained.

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