Large-diameter steel structure assembled circular pool wall plate welding device

Abstract

This invention provides a welding device for prefabricated circular water tank wall panels of large-diameter steel structures, belonging to the field of large-diameter steel structure welding technology. It includes several positioning and docking mechanisms, at least one automatic welding mechanism, and at least one end-face positioning mechanism. This welding device for prefabricated circular water tank wall panels of large-diameter steel structures, by setting a reference positioning limiter and establishing a stable spatial relationship between it and the docking seat, ensures that the weld position between adjacent wall panels is predetermined relative to the docking seat during the wall panel enclosure process by limiting the end face of the wall panels. This achieves pre-setting of the weld position. Simultaneously, through a rapid docking structure between the joint and the docking seat, the automatic welding mechanism allows the welding head to automatically match the weld based on the aforementioned spatial relationship after docking, eliminating the need for repositioning and adjustment before welding. This effectively improves the overall construction efficiency and operational convenience, while ensuring the consistency and stability of welding quality.

Description

Technical Field

[0001] This invention relates to the field of large-diameter steel structure welding technology, specifically to a welding device for prefabricated circular water tank wall panels of large-diameter steel structures. Background Technology

[0002] In the construction of large-scale water storage facilities, especially large-diameter steel-structured prefabricated circular water tanks, multiple arc-shaped wall panels are typically assembled to form an integral tank structure. Adjacent wall panels are welded together to form a sealed structure.

[0003] Currently, for welding adjacent wall panels, some existing technologies employ track-based automated welding. This technology arranges tracks according to the positions of the weld joints on adjacent wall panels, and a mobile device carrying the welding equipment moves along the tracks to complete the welding. Compared to manual welding, it offers higher efficiency and stability. However, in actual construction, this type of technology still faces the following technical challenges:

[0004] Due to the differences in the spatial position of different welds, welding tracks or welding equipment usually need to be positioned and adjusted separately for each weld. This results in repeated installation, disassembly and calibration of equipment during the welding process, leading to low construction efficiency and cumbersome operation.

[0005] Furthermore, the weld position formed during the panel enclosure stage lacks a unified reference constraint relationship with the subsequent positioning process of the welding equipment. That is, the panel assembly positioning and the welding equipment positioning are independent of each other, which leads to the need for repeated positioning of the same weld at different stages. This not only further reduces construction efficiency but also easily introduces cumulative errors, affecting the consistency and stability of welding quality.

[0006] Therefore, how to reduce the repetitive positioning process during construction, improve the efficiency and convenience of construction, and ensure the stability of welding quality has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] This invention provides a welding device for prefabricated circular water tank wall panels with a large diameter steel structure, comprising several positioning and docking mechanisms, at least one automatic welding mechanism, and at least one end-face positioning mechanism. The positioning and docking mechanisms are distributed along the circumference of the water tank and are respectively located between adjacent wall panels. Each positioning and docking mechanism includes an arc-shaped track coaxially arranged with the water tank, an adjusting seat movable along the arc-shaped track, a docking seat fixedly installed on the adjusting seat, and an adjusting and locking assembly for adjusting and locking the position of the adjusting seat. Both the end-face positioning mechanism and the automatic welding mechanism include a movable seat; the movable seat is provided with a docking... The head and the joint can selectively dock with any docking seat; the end face positioning mechanism also includes a reference positioning limiting component disposed on the movable seat. The reference positioning limiting component establishes a spatial calibration relationship with the docking seat through the docking of the corresponding joint and the docking seat, and limits the end face of the wall panel through the reference positioning limiting component, so that the position of the weld between adjacent wall panels is predetermined relative to the docking seat; the automatic welding mechanism also includes a welding track carrying a welding head; the welding head automatically matches the weld seam based on the spatial calibration relationship through the docking of the corresponding joint and the docking seat, and welding can be carried out without adjusting the position of the welding head.

[0008] In one possible implementation, the arc-shaped track includes an arc-shaped base with track grooves on its inner and outer sides; the adjustment seat includes a base with rollers symmetrically arranged on it, the rollers moving along the inner and outer track grooves to form a radial limit on the adjustment seat.

[0009] In one possible implementation, the arc-shaped track is provided with an inner wall limiting member for limiting and constraining the wall panel from the inside.

[0010] In one possible implementation, the mating seat includes symmetrically arranged circumferential limiting areas and axial limiting areas located between the circumferential limiting areas; the mating joint includes circumferential limiting elements that mate with the circumferential limiting areas and axial limiting elements that mate with the axial limiting areas, so as to position and constrain the movable seat in the circumferential and axial directions.

[0011] In one possible implementation, a guide ramp structure is provided between the connector and the docking seat for automatic guidance during the docking process.

[0012] In one possible implementation, the number of automatic welding mechanisms is at least two, located on the inner and outer sides of the wall panel respectively, and capable of welding the same weld seam separately or simultaneously.

[0013] In one possible implementation, the reference positioning limiter is a rigid limiting structure that forms a surface contact with the end face of the wall panel.

[0014] In one possible implementation, the adjustment locking assembly includes symmetrically arranged supports and abutments, with the abutments threadedly connected to the supports; the symmetrical supports are located on both sides of the adjustment seat; at least one of the supports is an openable structure to facilitate the insertion and removal of the adjustment seat.

[0015] In one possible implementation, the automatic welding mechanism further includes adsorption constraint heads mounted on the welding track, the adsorption constraint heads being symmetrically arranged and distributed along the circumference of the pool.

[0016] The above-mentioned one or more technical solutions in the embodiments of the present invention have the following technical effects: According to the embodiments of the present invention, a welding device for prefabricated circular water tank wall panels of large diameter steel structure is provided. By setting a reference positioning limiter and a docking seat to establish a spatial calibration relationship, during the wall panel enclosure stage, the reference positioning limiter is used to pre-position the end face of the wall panel, so that the weld position between adjacent wall panels is pre-determined relative to the docking seat, thereby realizing the pre-setting of the weld position. Upon entering the welding stage, the welding head of the automatic welding mechanism automatically matches the weld seam based on spatial calibration by aligning the butt joint on the moving seat with the docking seat. This forms a unified spatial reference covering the entire circumference of the pool. This design allows the positioning structure from the wall panel enclosure stage to be directly reused in the welding stage, eliminating the need for separate positioning and adjustment for each weld seam. This effectively improves the overall construction efficiency and operational convenience. Furthermore, since the wall panel enclosure positioning and welding equipment positioning are based on a unified reference constraint relationship established by the same docking seat, the problem of repetitive positioning caused by the independent positioning of the wall panel enclosure and welding is effectively avoided. This effectively reduces the impact of cumulative errors on welding quality, thus ensuring the consistency and stability of welding quality. In addition, the reference positioning limiter is dynamically adjusted along the circumference of the pool via an arc-shaped track and an adjustable seat. During the wall panel enclosure process, the adjustable seat is dynamically adjusted according to the actual installation of the wall panels. While ensuring that the weld seam position and the docking seat maintain a stable correspondence, this improves the system's adaptability to different installation conditions and enhances construction flexibility and convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a large-diameter steel structure prefabricated circular water tank wall panel welding device provided in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 yes Figure 1 Enlarged view of point C in the middle;

[0021] Figure 5 This is a schematic diagram of the circumferential limiting area, axial limiting area, and inner wall limiting component of a large-diameter steel structure prefabricated circular water tank wall panel welding device provided in an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the joint structure of a welding device for prefabricated circular water tank wall panels of a large-diameter steel structure provided in an embodiment of the present invention.

[0023] In the diagram: 1. Arc-shaped track; 101. Arc-shaped base; 102. Track groove; 2. Adjustment seat; 21. Base; 22. Roller; 3. Docking seat; 31. Circumferential limiting area; 32. Axial limiting area; 33. Block; 4. Adjustment and locking assembly; 41. Support; 42. Clamping component; 43. Axial clamping bolt; 5. Butt joint; 51. Circumferential limiting component; 52. Axial limiting component; 6. Moving seat; 7. Reference positioning limiting component; 8. Welding head; 9. Welding track; 10. Inner wall limiting component; 11. Adsorption constraint head; 12. Limiting seat; 100. Water tank; 200. Wall panel; 300. Foundation. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Please see Figures 1-4 A welding device for prefabricated circular water tank wall panels with large diameter steel structure includes several positioning and docking mechanisms, at least one automatic welding mechanism, and at least one end face positioning mechanism. The positioning and docking mechanisms are distributed along the circumference of the water tank 100 and are located between adjacent wall panels 200.

[0026] like Figure 1 As shown, in this embodiment, the water tank 100 is composed of multiple cylindrical layers spliced ​​together, and each cylindrical layer is composed of 10 wall panels 200 spliced ​​together. The water tank 100 is installed on the foundation 300 as a whole.

[0027] Several positioning and docking mechanisms are evenly distributed along the circumference of the pool 100, and each corresponds to the longitudinal joint position between adjacent wall panels 200. In this embodiment, the number of positioning and docking mechanisms is 10, which are evenly installed on the foundation 300. Several limiting seats 12 are also provided on the foundation 300. The limiting seats 12 are receiving seats with inner diameter limiting blocks. The limiting seats 12 are evenly distributed along the circumference of the pool 100 and are used to receive the wall panels 200 and limit the wall panels 200 from the inside to assist the wall panels 200 in quickly closing.

[0028] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The positioning and docking mechanism includes an arc-shaped track 1, an adjusting seat 2, a docking seat 3, and an adjusting and locking assembly 4. The arc-shaped track 1 is coaxially arranged with the water tank 100 and installed on the foundation 300. The adjusting seat 2 is movable along the arc-shaped track 1. The docking seat 3 is fixedly installed on the adjusting seat 2. The adjusting and locking assembly 4 is used to adjust and lock the position of the adjusting seat 2.

[0029] Both the end face positioning mechanism and the automatic welding mechanism include a movable base 6, on which a mating joint 5 is provided, which can selectively mate with any mating base 3.

[0030] The end-face positioning mechanism also includes a reference positioning limiting member 7 fixedly installed on the movable seat 6, used to limit the end face of the wall panel 200. Through the mating cooperation between the connector 5 and the mating seat 3, the reference positioning limiting member 7 and the mating seat 3 establish a spatial calibration relationship. Then, during the enclosure process of the wall panel 200, the reference positioning limiting member 7 limits and positions the end face of the wall panel 200, so that the position of the weld between adjacent wall panels 200 is predetermined relative to the mating seat 3 during the enclosure stage of the wall panel 200, that is, the weld and the mating seat 3 maintain a fixed relative positional relationship.

[0031] like Figure 3 As shown, the reference positioning limiter 7 is a vertically set limiter plate, the height of which is not less than the height of the wall panel 200 and is perpendicular to the docking seat 3.

[0032] Specifically: During the enclosure installation of the wall panel 200, the reference positioning limiter 7 and the docking seat 3 are stably connected by the docking of the connector 5 and the docking seat 3. Then, the end face of the wall panel 200 is abutted against the side of the reference positioning limiter 7 in a surface contact manner to limit the position of the end face of the wall panel 200 in the circumferential direction of the pool 100 and constrain the verticality of its end face. At the same time, the end face is corrected according to the actual abutment state so that the position of the weld between adjacent wall panels 200 is predetermined based on the docking seat 3 and the verticality of the weld is guaranteed. It should be noted that, since the weld width is usually small, and the thickness of the reference positioning limiter 7 is usually greater than the weld width in order to ensure the rigidity of the structure, during the positioning and placement of the wall panel 200, the wall panel 200 is first positioned and placed according to the reference positioning limiter 7 and the perpendicularity of its end face is determined. Then, the reference positioning limiter 7 is removed. Then, according to the difference between the thickness of the reference positioning limiter 7 and the width of the weld, the position of the wall panel 200 in the circumferential direction is finely adjusted so that the weld is in the preset state. After this fine-tuning step is completed, the final relative positional relationship between the weld and the mating seat 3 is determined.

[0033] During the assembly of each cylindrical layer, the first two adjacent wall panels 200 are positioned according to the location of the reference positioning limiter 7. During the installation of subsequent wall panels 200, before placing the next wall panel 200, the position of the corresponding adjusting seat 2 is adjusted so that the reference positioning limiter 7 is abutted against the end face of the already installed wall panel 200, and then the adjacent wall panels 200 are installed. During installation, after the adjacent wall panels 200 are positioned according to the reference positioning limiter 7 and the perpendicularity of their end faces is determined, the reference positioning limiter 7 is removed. Then, only minor adjustments to the circumferential position of the adjacent wall panels 200 are needed to determine the final relative positional relationship between the weld and the mating seat 3. This improves the flexibility and convenience of the wall panel 200 enclosure process and helps ensure the uniformity of the relative positional relationship between the weld and the corresponding mating seat 3.

[0034] By means of the above method, the adjusting seat 2 is dynamically adjusted according to the actual installation of the wall panel 200, thereby improving the flexibility of the enclosure process of the wall panel 200 and ensuring that the mating seat 3 and the corresponding weld maintain a stable and consistent relative positional relationship.

[0035] See Figure 4The automatic welding mechanism also includes a welding track 9 carrying a welding head 8; the welding track 9 is fixedly installed on a corresponding movable seat 6. After the wall panel 200 is enclosed to form a cylindrical layer, the welding head 8 is automatically positioned with the weld seam based on the relative positional relationship between the weld seam and the docking seat 3 via the butt joint 5 on the movable seat 6. This matching position is the preset welding position between the welding head 8 and the weld seam. Since the positional relationship between the weld seam and the docking seat 3 has been preset during the wall panel 200 enclosing stage, the automatic welding mechanism can reproduce this matching position through any docking seat during the welding stage. After matching, there is no need to adjust the position of the welding head 8; it can move along the welding track 9 to perform the welding operation. The automatic welding mechanism also includes an adsorption constraint head 11 installed on the welding track 9. The adsorption constraint head 11 is an electromagnetic adsorption structure used to adsorb onto the surface of the wall panel 200. The adsorption constraint heads 11 are symmetrically distributed along the circumference of the pool 100. During the docking process between the connector 5 and the docking seat 3, the adsorption constraint heads 11 abut against the adjacent wall panels 200, and then are energized to adsorb, thus stably fixing the welding track 9 in its current position. The welding head 8 then performs the welding operation, effectively improving the stability of the welding process. Two automatic welding mechanisms are located on the inner and outer sides of the wall panels 200, respectively, to achieve single-sided or double-sided synchronous welding. It should be noted that double-sided synchronous welding can be performed on the same weld seam or on different weld seams.

[0036] See Figure 1 , Figure 2 , Figure 5 and Figure 6 The mating seat 3 includes a strip 33, circumferential limiting areas 31 symmetrically arranged on both sides of the strip 33, and an axial limiting area 32 located between the two circumferential limiting areas 31. The mating joint 5 includes a circumferential limiting member 51 that mates with the circumferential limiting area 31 and an axial limiting member 52 that mates with the axial limiting area 32, for positioning and constraining the moving seat 6 in the circumferential and axial directions.

[0037] Specifically: The strip 33 is arranged radially along the water tank 100 and fixedly installed on the adjusting seat 2; the circumferential limiting area 31 consists of limiting surfaces on both sides of the strip 33, with both the inner and outer ends of the limiting surfaces having a guide slope structure; the axial limiting area 32 is a limiting groove that penetrates the strip 33 radially along the water tank 100. The inner and outer inlet ends of the limiting groove also have a guide slope structure. For example... Figure 5 As shown, the butt joint 5 can be connected to the docking seat 3 from either the inside or the outside, which facilitates the connection of the butt joint 5 on the automatic welding mechanism to the docking seat 3 from the inside, and then the welding operation is carried out on the weld from the inside.

[0038] The circumferential limiting member 51 is a vertical roller rotatably mounted on the corresponding movable seat 6, and the axial limiting member 52 is a horizontal roller rotatably mounted on the corresponding movable seat 6. During the docking process, the movable seat 6 moves radially inward, and the corresponding axial limiting member 52 enters the axial limiting area 32 and moves along its guide. At the same time, the circumferential limiting member 51 contacts the corresponding circumferential limiting area 31 and moves along its guide surface, thereby achieving dual circumferential and axial positioning of the movable seat 6. After the movable seat 6 moves to the preset position, it is locked by a pin or locking nut to ensure the stability of the above spatial positional relationship.

[0039] See Figure 1 , Figure 2 and Figure 5 The arc-shaped track 1 includes an arc-shaped base 101, with track grooves 102 respectively provided on the inner and outer sides of the arc-shaped base 101; the adjusting seat 2 includes a base 21, with a strip 33 fixedly installed on the base 21, and rollers 22 symmetrically arranged on the base 21. The rollers 22 move along the inner and outer track grooves 102 respectively, forming a radial limit on the adjusting seat 2.

[0040] The adjusting and locking assembly 4 includes symmetrically arranged supports 41 and clamping members 42. The base 21 is located between the symmetrical supports 41 and maintains a certain gap with the supports 41. The clamping members 42 are threadedly connected to the supports 41 and clamp the base 21 from both sides to achieve the position adjustment and locking of the adjusting seat 2. Since the arc-shaped track 1 is coaxial with the pool 100, the strip 33 is always arranged radially along the pool 100. To further ensure the stability of the position of the adjusting seat 2 after adjustment, axial clamping bolts 43 are provided on the base 21. During adjustment, the axial clamping bolts 43 are loosened, and during locking, the axial clamping bolts 43 are tightened to maintain a stable connection between the base 21 and the arc-shaped base 101.

[0041] At least one of the supports 41 is an openable structure to facilitate the insertion and removal of the adjusting seat 2. Specifically, the support 41 is detachably connected to the arc-shaped base 101. Before the adjusting seat 2 is installed on the arc-shaped track 1, the support 41 is installed on the arc-shaped base 101 after the adjusting seat 2 is installed on the arc-shaped track 1. For water tanks 100 of different diameters, the arc-shaped base 101 can be replaced.

[0042] See Figure 1 and Figure 5 An inner wall limiting member 10 is provided on the arc-shaped track 1, symmetrically arranged and distributed along the circumference of the pool 100. The inner wall limiting member 10 is a connecting seat for rotating and installing a limiting shaft. The connecting seat is fixedly installed on the base 21. The inner wall limiting member 10 limits and constrains the wall panel 200, assisting in the enclosure installation of the wall panel 200.

[0043] The installation process of the water tank 100 is as follows: First, establish the foundation 300, and then fix the limiting seat 12 and the arc-shaped base 101 on the foundation 300 according to the preset position. At the same time, arrange 10 electric hoist lifting devices (not shown in the figure) on the foundation 300. The electric hoist lifting devices are evenly distributed along the circumference of the water tank 100.

[0044] II. Perform the enclosure and welding of the top layer of the cylindrical structure. Specifically: 1. Connect the butt joint 5 in the end face positioning mechanism to any one of the docking seats 3. Then place the corresponding wall panel 200. During placement, ensure that the inner side of the wall panel 200 abuts against the corresponding limiting seat 12, and the end face abuts against the reference positioning limiting member 7. Adjust the abutment according to the abutment situation to ensure the perpendicularity of the end face. Afterward, remove the reference positioning limiting member 7 and fine-tune the circumferential position of the wall panel 200 according to the difference between the thickness of the reference positioning limiting member 7 and the weld width. By setting the spatial calibration relationship between the reference positioning limiting member 7 and the docking seat 3, one side of the wall panel 200 remains stationary, and only the circumferential position of the other side of the wall panel 200 needs to be fine-tuned. After the welds of adjacent wall panels 200 are in the preset state, perform manual spot welding to initially connect the adjacent wall panels 200 together.

[0045] 2. The remaining wall panels 200 are installed sequentially along the circumference. During the installation process, after the connector 5 in the end face positioning mechanism is connected with the corresponding docking seat 3, the position of the adjusting seat 2 is adjusted first so that the reference positioning limit piece 7 is close to the previously installed wall panel 200. Then the wall panel 200 is placed and the aforementioned correction, fine-tuning and spot welding preliminary connection process is carried out.

[0046] 3. During the enclosing installation of the last wall panel 200, the end faces of the adjacent already installed wall panels 200 are first corrected. Then, the end face of one side of the wall panel 200 is positioned and corrected using the reference positioning limiter 7. After that, the reference positioning limiter 7 is removed, and the end face of the other side of the wall panel 200 is corrected manually. Finally, the assembly is completed and the initial connection is made by spot welding.

[0047] 4. Align the butt joint 5 in the automatic welding mechanism with any mating seat 3, and then move the welding head 8 along the welding track 9 to weld the seam. After the welding is completed, continue the welding operation of the remaining seams.

[0048] 3. After the top layer of cylindrical shells is welded, an electric hoist is used to lift the shells to a certain height. The process of enclosing and welding adjacent lower layers continues, with the two layers welded together. The process is repeated, lifting the shells upwards and then sequentially enclosing and welding the next layer. Once all layers are welded together, they are lifted, and the limiting seat 12 and arc-shaped base 101 are removed. The shells are then lowered, and the bottom layer is sealed to the foundation 300. To avoid misalignment of the weld seams between upper and lower layers, which could affect the structural performance of the water tank 100, after the shell welding is completed, an existing roller frame with a hydraulic jacking device can be used to lift the shells, disengaging the bottom surface from the limiting seat 12. The shells are then rotated to offset the weld seams before being lowered back down.

[0049] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A welding device for prefabricated circular water tank wall panels with large diameter steel structure, characterized in that: It includes several positioning and docking mechanisms, at least one automatic welding mechanism, and at least one end face positioning mechanism; The positioning and docking mechanisms are distributed along the circumference of the pool and are located between adjacent wall panels. The positioning and docking mechanism includes: The curved track is coaxially aligned with the pool. The adjustment seat is moved along the arc track; A mating seat that is fixedly installed on the adjusting seat; An adjustment locking assembly for adjusting and locking the position of the adjustment seat; Both the end face positioning mechanism and the automatic welding mechanism include a movable base; the movable base is provided with a mating joint, which can selectively mate with any mating base. The end face positioning mechanism also includes a reference positioning limiting component disposed on the movable seat. The reference positioning limiting component establishes a spatial calibration relationship with the docking seat through the docking of the corresponding mating joint, and limits and positions the end face of the wall panel through the reference positioning limiting component, so that the position of the weld between adjacent wall panels is predetermined relative to the docking seat. The automatic welding mechanism also includes a welding track carrying a welding head; the welding head automatically matches the weld seam based on spatial calibration by docking with the corresponding connector and the docking seat, and welding can be carried out without adjusting the position of the welding head.

2. The welding device for prefabricated circular water tank wall panels of a large-diameter steel structure according to claim 1, characterized in that: The arc-shaped track includes an arc-shaped base, with track grooves provided on the inner and outer sides of the arc-shaped base; the adjustment seat includes a base body, with rollers symmetrically arranged on the base body, and the rollers move along the inner and outer track grooves respectively to form a radial limit on the adjustment seat.

3. A welding device for prefabricated circular water tank walls with large-diameter steel structure according to claim 1 or 2, characterized in that: The arc-shaped track is equipped with an inner wall limiting component, which is used to limit and constrain the wall panel from the inside.

4. The welding device for prefabricated circular water tank wall panels of a large-diameter steel structure according to claim 1, characterized in that: The docking seat includes symmetrically arranged circumferential limiting areas and axial limiting areas located between the circumferential limiting areas; the docking joint includes circumferential limiting components that cooperate with the circumferential limiting areas and axial limiting components that cooperate with the axial limiting areas, so as to position and constrain the moving seat in the circumferential and axial directions.

5. The welding device for prefabricated circular water tank wall panels of a large-diameter steel structure according to claim 4, characterized in that: A guide ramp structure is provided between the connector and the docking seat for automatic guidance during the docking process.

6. A welding device for prefabricated circular water tank wall panels of large-diameter steel structure according to any one of claims 1, 4, and 5, characterized in that: The number of automatic welding mechanisms is at least two, located on the inner and outer sides of the wall panel respectively, and capable of welding the same weld seam separately or simultaneously.

7. The welding device for prefabricated circular water tank wall panels of a large-diameter steel structure according to claim 1, characterized in that: The reference positioning limiter is a rigid limiting structure that forms a surface contact with the end face of the wall panel.

8. A welding device for prefabricated circular water tank wall panels of large-diameter steel structure according to claim 1 or 2, characterized in that: The adjustment and locking assembly includes symmetrically arranged supports and abutments, with the abutments threadedly connected to the supports; the symmetrical supports are located on both sides of the adjustment seat; at least one of the supports is an openable structure to facilitate the insertion and removal of the adjustment seat.

9. The welding device for prefabricated circular water tank wall panels of a large-diameter steel structure according to claim 1, characterized in that: The automatic welding mechanism also includes adsorption constraint heads installed on the welding track, which are symmetrically arranged and distributed along the circumference of the water tank.

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