A flipping fixture for a large annular component of a tokamak device and its usage method

Abstract

This invention relates to a flipping fixture for a large annular component of a tokamak device and its method of use, belonging to the technical field of load-bearing devices for cranes or winches. The fixture comprises a lower half-frame and an upper half-frame that can be joined and separated. The lower half-frame is equipped with a flipping lug. Both the upper and lower half-frames are octagonal, each enclosed by eight hollowed-out rectangular borders. Each half-frame has an upper truss and a lower truss, with the trusses consisting of multiple rods connected in a star-shaped and half-star-shaped pattern to form a hollow structure. A lower inner pressure ring and a lower outer pressure ring are fixed to the lower truss. An upper inner pressure ring, a middle pressure ring, and an upper outer pressure ring are fixed to the upper truss in sequence from the inside out. In use, when the large annular component is placed inside the flipping fixture, it can be firmly pressed and limited in both the horizontal and vertical directions by the upper and lower half-frames, allowing for multiple flips with the fixture. This facilitates multiple welding operations on the large annular component.

Description

Technical Field

[0001] This invention relates to the field of installation technology for tokamak devices in controlled nuclear fusion, and in particular to a tooling and method for flipping large annular components of a tokamak device, belonging to the technical field of load-bearing devices for cranes or winches (B66C13 / 08). Background Technology

[0002] The tokamak device is an ultra-large vacuum vessel, and the large annular component is one of its key parts. The main manufacturing process for this annular component involves welding large, thick plates, with a thickness ranging from 65 to 145 mm. To ensure weld quality, double-sided welding is required, necessitating multiple welding and flipping operations for the entire annular component. Current mainstream practices include flat welding followed by overhead welding (double-sided welding) or directly adding lifting lugs for flipping. However, the flat welding followed by overhead welding presents challenges due to the difficulty and poor quality of the overhead welding position, resulting in numerous weld reworks and hindering product quality control. Directly adding lifting lugs for flipping is prone to instability at the 90° rotation, generating significant kinetic energy and posing a safety hazard. Furthermore, because this annular component measures φ17600×865 mm and weighs approximately 197 tons, requiring the welding of numerous lifting lugs, the welding and removal processes cause some damage to the workpiece itself. Summary of the Invention

[0003] The technical problem of this invention is how to perform non-destructive flipping of large annular components of a tokamak device, thereby facilitating the welding of such large annular components.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A flipping fixture for a large annular component of a tokamak device, comprising a lower half-frame and an upper half-frame that can be joined and separated from each other, with flipping lugs provided on opposite sides of the lower half-frame; the upper half-frame and the lower half-frame are each an octagon formed by eight hollow rectangular borders, each border comprising two layers of side rods consisting of vertically parallel fixed-layer side rods and upper-layer side rods, and vertically connected support rods; within the octagonal borders of both the upper and lower half-frames, upper and lower trusses are formed, flush with the fixed-layer side rods, and the trusses are all formed by multiple rods connected in a star-shaped and half-star-shaped manner to form a hollow structure; within the octagonal borders of both the upper and lower half-frames, a square central frame is formed, flush with the upper-layer side rods, and the central frame is fixedly connected to the trusses by interlayer connecting rods.

[0005] The lower half-truss is fixed with a lower inner pressure ring and a lower outer pressure ring. The lower half-truss is fixed with a plurality of lower leveling rods located between the lower inner pressure ring and the lower outer pressure ring and spaced apart within the circumference. The lower inner pressure ring is fixed with a plurality of lower inner horizontal limiting rods spaced apart along the circumference. The lower outer pressure ring is fixed with a plurality of lower outer horizontal limiting rods spaced apart along the circumference. The lower inner pressure ring, the lower outer pressure ring and the lower leveling rods are all fixed with a plurality of hydraulic rods spaced apart along the circumference.

[0006] The upper truss is fixed with an upper inner pressure ring, a middle pressure ring, and an upper outer pressure ring arranged sequentially from the inside to the outside. The upper truss is also fixed with a plurality of upper leveling rods located between the middle pressure ring and the upper outer pressure ring and spaced apart within the circumference. The upper inner pressure ring is fixed with a plurality of upper inner horizontal limiting rods spaced apart along the circumference. The middle pressure ring is fixed with a plurality of upper outer horizontal limiting rods spaced apart along the circumference. Vertical limiting rods are fixed on the upper inner pressure ring, the middle pressure ring, the upper outer pressure ring, and the upper leveling rods.

[0007] To solve the above-mentioned technical problems, the present invention provides the following second technical solution: a method for using a flipping fixture for a large annular component of a tokamak device, which employs the method described in the first technical solution above, wherein...

[0008] The large annular component includes upper and lower annular plate assemblies, an annular vertical plate assembly vertically fixed between the upper and lower annular plate assemblies, and multiple sandwich reinforcing rib assemblies. The lower annular plate assembly includes an inner ring assembly and an outer ring assembly. The annular plate assembly and the annular vertical plate assembly are welded together from multiple parts evenly divided along the circumference.

[0009] Includes the following steps:

[0010] 1) Lay the lower half frame flat, with the fixed layer edge rods and the lower half truss at the bottom, and the upper layer edge rods, lower inner pressure rings, lower outer pressure rings, lower leveling rods, lower inner horizontal limit rods, lower outer horizontal limit rods and hydraulic rods of the lower half frame facing upwards.

[0011] 2) Place the lower surfaces of the inner and outer ring components of the lower annular plate assembly on the hydraulic rods of the lower half frame, adjust the height of the hydraulic rods to ensure that each component is level in the horizontal plane, and then spot weld them in place. Adjust the lower inner horizontal limit rod and the lower outer horizontal limit rod so that the lower inner horizontal limit rod presses against the inner edge of the lower annular plate assembly and the lower outer horizontal limit rod presses against the outer edge of the lower annular plate assembly.

[0012] The lower end rings of each part of the sandwich reinforcing rib assembly and the annular vertical plate assembly are spot welded to the inner ring assembly of the lower annular flat plate assembly. Then, the surfaces of each part of the upper annular flat plate assembly are placed on the upper surface of the sandwich reinforcing rib assembly, and the level is adjusted before spot welding.

[0013] 3) The upper frame is hoisted above the large ring-shaped component and then lowered, aligning the upper frame with the lower frame.

[0014] The half-frames are joined together so that the upper annular plate is located between the upper inner horizontal limiting rod of the upper inner pressure ring and the upper outer horizontal limiting rod of the middle pressure ring. The upper half-frame's frame side rods, upper inner pressure ring, middle pressure ring, upper outer pressure ring, upper outer horizontal limiting rod, upper inner horizontal limiting rod, upper leveling rod, and vertical limiting rod face downwards.

[0015] The upper frame and the lower frame are fixed together by bolts;

[0016] Adjust the upper inner horizontal limiting rod and the upper outer horizontal limiting rod so that the upper inner horizontal limiting rod presses against the inner edge of the upper annular plate and the upper outer horizontal limiting rod presses against the outer edge of the upper annular plate.

[0017] Adjust the vertical limiting rods on the upper outer pressure ring and the upper leveling rod so that they press against the upper surface of the lower annular plate. Adjust the vertical limiting rods on the upper inner pressure ring and the middle pressure ring so that they press against the upper surface of the upper annular plate. The vertical clamping of the large annular component is achieved by the vertical limiting rods of the upper half frame and the hydraulic rods of the lower half frame.

[0018] 4) Perform the first butt welding between the components of the inner ring assembly and the outer ring assembly of the lower annular flat plate assembly;

[0019] The first welding is performed between the components of the upper annular flat plate assembly;

[0020] Fillet welds are performed between the sandwich reinforcing rib assembly and the upper and lower annular flat plate assemblies;

[0021] Double-sided welding is performed between the components of the annular vertical plate assembly;

[0022] Double-sided welding is performed on the annular vertical plate assembly and the upper and lower annular flat plate assemblies;

[0023] 5) Transfer the tilting fixture and large ring-shaped component to the tilting area. The crane lifts the tilting fixture and large ring-shaped component through the tilting lugs and uses a winch to provide tilting power. The winch connection point is located on the fixed layer side bar on both sides of the tilting axis of the upper and lower half frame.

[0024] 6) After the first flipping of the flipping fixture and the large ring-shaped component is completed, place it on the support platform and continue to perform the second butt welding between the inner ring component and the outer ring component of the lower ring plate assembly, and continue to perform the second butt welding between the components of the upper ring plate assembly.

[0025] 7) Flip the flipping fixture and the large ring-shaped component again, and continue to perform the third butt welding between the inner ring component and the outer ring component of the lower ring plate assembly, and continue to perform the third butt welding between the components of the upper ring plate assembly.

[0026] Multiple flips are performed starting from the first flip to complete all welding;

[0027] 8) Remove the bolts connecting the upper and lower frame sides, and adjust the upper inner and upper outer horizontal limiting rods so that the upper inner horizontal limiting rod is away from the inner edge of the upper annular plate, and the upper outer horizontal limiting rod is away from the outer edge of the upper annular plate.

[0028] Lift the upper frame;

[0029] Adjust the lower inner horizontal limit rod and the lower outer horizontal limit rod so that the lower inner horizontal limit rod moves away from the inner edge of the lower annular plate and the lower outer horizontal limit rod moves away from the outer edge of the lower annular plate.

[0030] Then, lift the large ring-shaped component out of the lower frame.

[0031] Compared with the prior art, the beneficial effects of the present invention are: it fully adapts to the shape requirements of large ring-shaped parts, divides the flipping fixture into two halves, namely the upper half frame and the lower half frame, and through special design of the structure of the upper half frame and the lower half frame, the large ring-shaped parts can be firmly pressed and limited by the upper half frame and the lower half frame in the horizontal and vertical directions when placed in the flipping fixture, so that they can be flipped multiple times with the flipping fixture; moreover, the upper half frame, the lower half frame and the frame are all designed with hollow structure, which facilitates multiple welding of large ring-shaped parts.

[0032] A further step in the above technical solution is that the border forms a double frame structure on opposite sides of its octagon. The double frame structure is formed by extending one side of the border outward in parallel for a short section to create a frame that is exactly the same as the border, and connecting the two with a short rod.

[0033] A further improvement in the above technical solution is that a diagonal brace is also fixed between the fixed layer side rod and the upper layer side rod.

[0034] A further improvement in the above-mentioned technical solution is that the lower inner pressure ring and the lower outer pressure ring are connected and fixed to the lower half truss through vertical support rods and diagonal support rods.

[0035] A further improvement in the above technical solution is that the vertical limiting rods on the upper inner pressure ring and the middle pressure ring are shorter than the vertical limiting rods on the upper leveling rod.

[0036] A further improvement in the above technical solution is that the hollow structure is divided into four corner areas A, four side areas B, a central area C, and two complex frame areas D on its projection surface; area A is a half-rice-shaped connection structure of equilateral right triangles; area B is a rectangular rice-shaped connection structure; area C is a square rice-shaped connection structure; and area D is a slender rectangular connection structure.

[0037] A further improvement in the above technical solution is that the tilting lug includes an inner fixing plate, a middle fixing plate, an outer fixing plate, a rotating shaft, a lug component, and a rolling bearing; the inner fixing plate, the middle fixing plate, and the outer fixing plate are welded and fixed to the side rod of the fixed layer; the rotating shaft passes through the middle fixing plate, the inner fixing plate, and the outer fixing plate and is welded and fixed; the rotating shaft and the lug component are rotatably connected through the rolling bearing; and the lug component is provided with a lifting hole for lifting.

[0038] A further improvement in the above technical solution is that the lower inner horizontal limiting rod, the lower outer horizontal limiting rod, the upper inner horizontal limiting rod, and the upper outer horizontal limiting rod have the same structure, each including an I-beam, a web, an adjusting assembly, a limiting plate, and a reinforcing rib; the adjusting assembly includes a leveling screw and a nut; the I-beam is welded and fixed to the web, and the limiting plate and the reinforcing rib are welded and fixed to each other; the leveling screw of the adjusting assembly passes through the I-beam and abuts against the limiting plate; the horizontal displacement of the limiting plate is achieved through the leveling screw of the adjusting assembly.

[0039] A further improvement in the above technical solution is that the hydraulic rod includes a column, a hydraulic jack, a baffle, a top plate, a bottom plate, and a bolt adjustment assembly; the hydraulic rod is respectively welded to the surfaces of the lower inner pressure ring, the lower outer pressure ring, and the lower leveling rod; the hydraulic jack is located between the column and the top plate and is fixed or removed by the baffle and screws; the vertical displacement between the column and the top plate is adjusted by the bolt adjustment assembly; the vertical limiting mechanism includes the same column, top plate, bottom plate, and bolt adjustment assembly as the hydraulic rod. Attached Figure Description

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] Figure 1 This is a schematic diagram of the overall assembly structure of a flipping fixture for a large annular component of a tokamak device according to an embodiment.

[0042] Figure 2 From Figure 1 A schematic diagram of the lower half of the frame, which is decomposed in the middle;

[0043] Figure 3 From Figure 1 A schematic diagram of the structure where the upper half of the frame is flipped 180 degrees.

[0044] Figure 4 From Figure 2 or Figure 3 Orthographic view of the decomposed border and truss sections;

[0045] Figure 5 From Figure 1 A schematic diagram of the structure of the lifting lugs disassembled from the original structure;

[0046] Figure 6 yes Figure 2 or Figure 3 A schematic diagram of the horizontal limiting rod decomposed from the middle;

[0047] Figure 7 yes Figure 2 A schematic diagram of the hydraulic rod disassembled from the sample;

[0048] Figure 8 yes Figure 3 A schematic diagram of the vertical limiting rod in the middle section;

[0049] Figure 9 This is a structural schematic diagram of a large ring-shaped component;

[0050] Figure 10 yes Figure 9 A bottom view; Figure 11 yes Figure 1 A cross-sectional schematic diagram showing a large ring-shaped component placed inside;

[0051] Figure 12 yes Figure 11 A simplified enlarged view of the area at point I in the middle. Detailed Implementation

[0052] Example

[0053] This embodiment provides a flipping fixture for a large annular component of a tokamak device, such as... Figure 1 As shown, it includes a lower frame 1 and an upper frame 2 that can be joined and separated from each other. Two flip-up lugs 3 are respectively provided on opposite sides of the lower frame 1. Figure 1 , Figure 2 and Figure 3 As shown, the upper frame 2 and the lower frame 1 are each an octagon formed by eight open rectangular borders. The borders consist of two layers of side members: a fixed layer of side members 4 and a supporting layer of side members 5, which are parallel vertically aligned, and vertical support members 7 that connect the two layers of side members 4 and 5. Within the octagonal borders of both the upper frame 2 and the lower frame 1, upper trusses 2-1 and lower trusses 1-1 are formed, flush with and connected to the fixed layer of side members 4. Figure 4As shown, the trusses (upper truss 2-1 and lower truss 1-1) are all formed by connecting multiple rods in a cross shape and half cross shape to form a hollow structure; the upper frame 2 and the lower frame 1 each have a square central frame 40 that is flush with the upper side rod 5 of the truss within their octagonal borders. The central frame 40 is fixedly connected to the trusses (upper truss 2-1 and lower truss 1-1) by interlayer connecting rods 41.

[0054] In this embodiment, the frame forms a double frame structure 39 on the opposite sides of its octagon. The double frame structure 39 is formed by extending one side of the frame outward in parallel for a short section to create a frame that is exactly the same as the frame and connecting the two (the frame and the copied frame) with a short rod. A diagonal brace 6 is also fixed between the fixed layer side rod 4 and the frame layer side rod 5.

[0055] like Figure 2 As shown, a lower inner pressure ring 9 and a lower outer pressure ring 8 are fixedly mounted on the lower truss 1-1. Multiple lower leveling rods 14, located between the lower inner pressure ring 9 and the lower outer pressure ring 8 and spaced apart within the circumference, are fixedly mounted on the lower truss 1-1. Multiple lower inner horizontal limiting rods 10, spaced apart along the circumference, are fixedly mounted on the lower inner pressure ring 9. Multiple lower outer horizontal limiting rods 12, spaced apart along the circumference, are fixedly mounted on the lower outer pressure ring 8. Multiple hydraulic rods 13, spaced apart along the circumference, are fixedly mounted on the lower inner pressure ring 9, the lower outer pressure ring 8, and the lower leveling rods 14. In this embodiment, the lower inner pressure ring 9 and the lower outer pressure ring 8 are connected and fixed to the lower truss 1-1 by additional vertical and diagonal braces; these connections are self-evident and will not be described or illustrated further.

[0056] like Figure 3 As shown, the upper truss 2-1 is fixed with an upper inner pressure ring 35, a middle pressure ring 26, and an upper outer pressure ring 36 arranged sequentially from the inside to the outside. Multiple upper leveling rods 37 are fixed to the upper truss 2-1, located between the middle pressure ring 26 and the upper outer pressure ring 36 and spaced apart within the circumference. Multiple upper inner horizontal limiting rods 27 are fixed to the upper inner pressure ring 35 and spaced apart along the circumference. Multiple upper outer horizontal limiting rods 38 are fixed to the middle pressure ring and spaced apart along the circumference. Vertical limiting rods 29 and 28 are fixed to the upper inner pressure ring 35, the middle pressure ring 26, the upper outer pressure ring 36, and the upper leveling rods 37. In this embodiment, the vertical limiting rods 29 on the upper inner pressure ring 35 and the middle pressure ring 26 are shorter than the vertical limiting rods 28 on the upper leveling rods 37 and the upper outer pressure ring 36.

[0057] like Figure 4As shown, both the upper truss 2-1 and the lower truss 1-1 are formed by connecting multiple rods in a star-shaped and half-star-shaped configuration to create a hollow structure. In this embodiment, the hollow structure is divided into four corner areas A, four side areas B, a central area C, and two complex frame areas D on its projection plane. Area A is a half-star-shaped connection structure of equilateral right triangles; area B is a rectangular star-shaped connection structure; area C is a square star-shaped connection structure; and area D is a slender rectangular connection structure.

[0058] like Figure 5 As shown, the flip-up lifting lug 3 of this embodiment includes: an inner fixing plate 20, a middle fixing plate 21, an outer fixing plate 22, a rotating shaft 23, a lifting lug 24, and a rolling bearing 25; the inner fixing plate 20, the middle fixing plate 21, and the outer fixing plate 22 are welded and fixed to the side rod 4 of the fixing layer; the rotating shaft 23 passes through the inner fixing plate 20, the middle fixing plate 21, and the outer fixing plate 22 and is welded and fixed; the rotating shaft 23 and the lifting lug 24 are rotatably connected by the rolling bearing 25; the lifting lug 24 is provided with a lifting hole for lifting.

[0059] The structures of the lower inner horizontal limiting rod 10, the lower outer horizontal limiting rod 12, the upper inner horizontal limiting rod 27, and the upper outer horizontal limiting rod 38 in this embodiment are completely identical, as follows: Figure 6 As shown, it includes an I-beam 30, a web 31, an adjustment assembly 19, a limiting plate 32, and a reinforcing rib 33; the adjustment assembly 19 includes a leveling screw and a nut; the I-beam 30 and the web 31 are welded and fixed to each other, and the limiting plate 32 and the reinforcing rib 33 are welded and fixed to each other; the leveling screw of the adjustment assembly 19 passes through the I-beam 30 and abuts against the limiting plate 32, and the horizontal displacement of the limiting plate 32 is achieved by the leveling screw of the adjustment assembly 19.

[0060] like Figure 7 As shown, this embodiment has no fewer than 56 hydraulic rods 13. Each hydraulic rod 13 includes a column 15, a hydraulic jack 16, a baffle 17, a top plate 18, a bottom plate 42, and a bolt adjustment assembly 19. The hydraulic rods 13 are respectively welded to the surfaces of the lower inner pressure ring 9, the lower outer pressure ring 8, and the lower leveling rod 14. The hydraulic jack 16 is located between the column 15 and the top plate 18 and is fixed or removed by the baffle 17 and screws. The vertical displacement between the column 15 and the top plate 18 is adjusted by the bolt adjustment assembly 19.

[0061] like Figure 8 As shown, the vertical limiting mechanisms 28 and 29 in this embodiment are similar in structure to the hydraulic rod 13, and also include a column 15, a top plate 18, a bottom plate 42 and a bolt adjustment assembly 19, but the hydraulic jack 16 and the baffle 17 are omitted.

[0062] like Figure 9 and Figure 10As shown, the large annular component 100 to be welded and assembled in this embodiment includes upper and lower annular plate assemblies 101 and 102, an annular vertical plate assembly 103 and multiple sandwich reinforcing rib assemblies 104 vertically fixed between the upper and lower annular plate assemblies, and the lower annular plate assembly 102 includes an inner ring assembly 102-1 and an outer ring assembly 102-2; the method of using a flipping fixture for a large annular component of a tokamak device in this embodiment includes the following steps:

[0063] 1) Lay the lower half frame 1 flat, with the fixed layer edge rod 4 and the lower half truss 1-1 at the bottom, and the upper layer edge rod 5, the lower inner pressure ring 9, the lower outer pressure ring 8, the lower leveling rod 14, the lower inner horizontal limit rod 10, the lower outer horizontal limit rod 12 and the hydraulic rod 13 of the lower half frame 2 facing upward.

[0064] 2) Place the parts of the inner ring assembly 102-1 and outer ring assembly 102-2 of the lower annular plate assembly 102 on the hydraulic rod 1 of the lower half frame 1. In this embodiment, the lower surface of each part rests on the top plate 18 of the top surface of the hydraulic rod 13. Adjust the height of the hydraulic rod 13 so that each part of the lower annular plate assembly 102 has a uniform level in the horizontal plane. Then spot weld it to fix it. Adjust the lower inner horizontal limiting rod 10 and the lower outer horizontal limiting rod 12 so that the lower inner horizontal limiting rod 10 presses the inner ring edge of the lower annular plate assembly 102 and the lower outer horizontal limiting rod 12 presses the outer ring edge of the lower annular plate assembly 102.

[0065] The lower end rings of each part of the sandwich reinforcing rib assembly 104 and the annular vertical plate assembly 103 are spot welded to the inner ring assembly 102-1 of the lower annular flat plate assembly 102. Then, the lower surfaces of each part of the upper annular flat plate assembly 101 are placed on the upper surface of the sandwich reinforcing rib assembly 104, and the level is adjusted before spot welding.

[0066] 3) The upper frame 2 is hoisted above the large annular component 100 and lowered, aligning the upper frame 2 with the lower frame 1, so that the upper annular plate assembly 101 is positioned between the upper inner horizontal limiting rod 27 of the upper inner pressure ring 35 and the upper outer horizontal limiting rod 38 of the middle pressure ring 26, as shown. Figure 11 and Figure 12 As shown; at this time, the upper frame 1's upper side bar 5, upper inner pressure ring 35, middle pressure ring 26, upper outer pressure ring 36, upper outer horizontal limiting bar 38, upper inner horizontal limiting bar 27, upper leveling bar 37, and vertical limiting bars 29 and 28 are facing downwards.

[0067] The upper frame 2 and the lower frame 1 are fixed together by bolts. The gap between them shall not be greater than 0.5mm. Otherwise, rubber pads shall be added.

[0068] Adjust the upper inner horizontal limiting rod 27 and the upper outer horizontal limiting rod 38 so that the upper inner horizontal limiting rod 27 presses against the inner edge of the upper annular plate assembly 101, and the upper outer horizontal limiting rod 38 presses against the outer edge of the upper annular plate assembly 101. Figure 11 and Figure 12 As shown;

[0069] Adjust the vertical limiting rods 289 on the upper outer pressure ring 36 and the upper leveling rod 37 so that they press against the upper surface of the upper annular plate; adjust the vertical limiting rods 29 on the upper inner pressure ring 35 and the middle pressure ring 26 so that they press against the upper surface of the lower annular plate assembly 102. In this way, the large annular component is vertically clamped from below and above by the hydraulic rod 13 of the lower half-frame 1 and the vertical limiting rods 28 and 29 of the upper half-frame 2, respectively. Figure 12 As shown.

[0070] 4) Perform the first butt welding between the parts of the inner ring assembly 102-1 and the outer ring assembly 102-2 of the lower annular flat plate assembly 102;

[0071] Fillet welds are performed between the sandwich reinforcing rib assembly 104 and the upper and lower annular flat plate assemblies 101 and 102;

[0072] The first welding is performed between the components of the upper annular flat plate assembly 101;

[0073] Double-sided welding is performed between the components of the annular vertical plate assembly 103;

[0074] Double-sided welding is performed on the annular vertical plate assembly 103 and the upper and lower annular flat plate assemblies 101 and 102;

[0075] 5) Transfer the tilting fixture and the large ring component 100 to the tilting area. Two cranes lift the tilting fixture and the large ring component 100 on both sides of the lower half frame 1 through two tilting lugs 3 respectively. The tilting power is provided by the winches located on both sides of the entire fixture. The winch connection point of the winch is located on the fixed layer side bar 4 on both sides of the tilting axis of the upper half frame 2 and the lower half frame 1.

[0076] 6) After the first flipping of the flipping fixture and the large annular component 100 is completed, place it on the support platform and continue to perform the first butt welding between the parts of the inner ring component 102-1 and the outer ring component 102-2 of the lower annular plate assembly 102, and continue to perform the second butt welding between the parts of the upper annular plate assembly 101.

[0077] 7) Flip the flipping fixture and the large ring component again, and continue to perform the first butt welding between the parts of the inner ring component 102-1 and the outer ring component 102-2 of the lower ring plate assembly 102, and continue to perform the third butt welding between the parts of the upper ring plate assembly 101.

[0078] Multiple flips are performed starting from the first flip to complete all welding; in this embodiment, five flips are selected, and the number of flips is an odd number.

[0079] 8) Remove the bolts connecting the upper half-frame 2 and the lower half-frame 1, and adjust the upper inner horizontal limiting rod 27 and the upper outer horizontal limiting rod 38 so that the upper inner horizontal limiting rod 27 moves away from the inner edge of the upper annular plate assembly 101, and the upper outer horizontal limiting rod 38 moves away from the outer edge of the upper annular plate assembly 101.

[0080] Lift the upper half of the frame 2;

[0081] Adjust the lower inner horizontal limiting rod 10 and the lower outer horizontal limiting rod 12 so that the lower inner horizontal limiting rod 10 moves away from the inner edge of the lower annular plate assembly 102 and the lower outer horizontal limiting rod 12 moves away from the outer edge of the lower annular plate assembly 102.

[0082] Then, the large ring-shaped component 100 is lifted out of the lower frame 1.

[0083] The above description is only a preferred embodiment of the present invention, but the present invention is not limited thereto. All equivalent substitutions or modifications made to the concepts and technical solutions of the present invention should be covered within the protection scope of the present invention.

Claims

1. A flipping fixture for a large annular component of a tokamak device, characterized in that... The device comprises a lower and upper frame that can be joined and separated. The lower frame has flip-up lifting lugs on opposite sides. The upper and lower frames are each octagonal, enclosed by eight open rectangular borders. Each border consists of two layers of side members: a fixed layer and a high-level side member, both parallel to each other, and vertically connected support members. Within the octagonal borders of both the upper and lower frames, upper and lower trusses are formed, flush with the fixed layer side members. These trusses are constructed of multiple members connected in a star-shaped and half-star-shaped pattern to form an openwork structure. Within the octagonal borders of both the upper and lower frames, a square central frame is formed, flush with the high-level side members. The central frame is fixedly connected to the trusses via interlayer connecting rods. The lower half-truss is fixed with a lower inner pressure ring and a lower outer pressure ring. The lower half-truss is fixed with a plurality of lower leveling rods located between the lower inner pressure ring and the lower outer pressure ring and spaced apart within the circumference. The lower inner pressure ring is fixed with a plurality of lower inner horizontal limiting rods spaced apart along the circumference. The lower outer pressure ring is fixed with a plurality of lower outer horizontal limiting rods spaced apart along the circumference. The lower inner pressure ring, the lower outer pressure ring and the lower leveling rods are all fixed with a plurality of hydraulic rods spaced apart along the circumference. The upper truss is fixed with an upper inner pressure ring, a middle pressure ring, and an upper outer pressure ring arranged sequentially from the inside to the outside. The upper truss is also fixed with a plurality of upper leveling rods located between the middle pressure ring and the upper outer pressure ring and spaced apart within the circumference. The upper inner pressure ring is fixed with a plurality of upper inner horizontal limiting rods spaced apart along the circumference. The middle pressure ring is fixed with a plurality of upper outer horizontal limiting rods spaced apart along the circumference. Vertical limiting rods are fixed on the upper inner pressure ring, the middle pressure ring, the upper outer pressure ring, and the upper leveling rods.

2. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The border forms a double frame structure on opposite sides of its octagon. The double frame structure is formed by extending one side of the border outward in parallel for a short distance to create a frame that is exactly the same as the border and connecting the two with a short rod.

3. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: A diagonal brace is also fixed between the fixed layer side rod and the upper layer side rod.

4. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The lower inner pressure ring and the lower outer pressure ring are connected and fixed to the lower half truss through vertical support rods and diagonal support rods.

5. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The vertical limiting rods on the upper inner pressure ring and the middle pressure ring are shorter than the vertical limiting rods on the upper leveling rod and the upper outer pressure ring.

6. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The hollow structure is divided into four corner areas A, four side areas B, a central area C, and two double-frame areas D on its projection surface; area A is a half-rice-shaped connection structure of equilateral right triangles; area B is a rice-shaped connection structure of rectangles; area C is a rice-shaped connection structure of squares; and area D is a slender rectangular connection structure.

7. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The flipping lifting lug includes an inner fixing plate, a middle fixing plate, an outer fixing plate, a rotating shaft, a lifting lug component, and a rolling bearing. The inner fixing plate, the middle fixing plate, and the outer fixing plate are welded and fixed to the side rod of the fixed layer. The rotating shaft passes through the middle fixing plate, the inner fixing plate, and the outer fixing plate and is welded and fixed. The rotating shaft and the lifting lug component are rotatably connected through the rolling bearing. The lifting lug component is provided with a lifting hole for lifting.

8. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The lower inner horizontal limiting rod, lower outer horizontal limiting rod, upper inner horizontal limiting rod, and upper outer horizontal limiting rod have the same structure, each including an I-beam, a web, an adjusting assembly, a limiting plate, and a reinforcing rib. The adjusting assembly includes a leveling screw and a nut. The I-beam is welded to the web, and the limiting plate and the reinforcing rib are welded to each other. The leveling screw of the adjusting assembly passes through the I-beam and abuts against the limiting plate. The horizontal displacement of the limiting plate is achieved by the leveling screw of the adjusting assembly.

9. The flipping fixture for the large annular component of the tokamak device according to claim 1, characterized in that: The hydraulic rod includes a column, a hydraulic jack, a baffle, a top plate, a bottom plate, and a bolt adjustment assembly; the hydraulic rod is welded to the surfaces of the lower inner pressure ring, the lower outer pressure ring, and the lower leveling rod; the hydraulic jack is located between the column and the top plate and is fixed or removed by the baffle and screws; the vertical displacement between the column and the top plate is adjusted by the bolt adjustment assembly; the vertical limiting rod includes the same column, top plate, bottom plate, and bolt adjustment assembly as the hydraulic rod.

10. A method of using the flipping fixture for a large annular component of a tokamak device according to any one of claims 1-9, wherein the large annular component comprises upper and lower annular plate assemblies, an annular vertical plate assembly vertically fixed between the upper and lower annular plate assemblies, and a plurality of interlayer reinforcing rib assemblies, the lower annular plate assembly comprising an inner ring assembly and an outer ring assembly, the annular plate assembly and the annular vertical plate assembly being welded together from a plurality of parts evenly divided along the circumference; characterized in that... Includes the following steps: 1) Lay the lower half frame flat, with the fixed layer edge rods and the lower half truss at the bottom, and the upper layer edge rods, lower inner pressure rings, lower outer pressure rings, lower leveling rods, lower inner horizontal limit rods, lower outer horizontal limit rods and hydraulic rods of the lower half frame facing upwards. 2) Place the lower surfaces of the inner and outer ring components of the lower annular plate assembly on the hydraulic rods of the lower half frame, adjust the height of the hydraulic rods to ensure that each component is level in the horizontal plane, and then spot weld them in place. Adjust the lower inner horizontal limit rod and the lower outer horizontal limit rod so that the lower inner horizontal limit rod presses against the inner edge of the lower annular plate assembly and the lower outer horizontal limit rod presses against the outer edge of the lower annular plate assembly. The lower end rings of each part of the sandwich reinforcement assembly and the annular vertical plate assembly are spot welded to the inner ring assembly of the lower annular flat plate assembly. Then, the lower surfaces of each part of the upper annular flat plate assembly are placed on the upper surfaces of the sandwich reinforcement assembly and the annular vertical plate assembly. After adjusting the levelness, they are spot welded to fix them. 3) The upper frame is hoisted above the large ring-shaped component and then lowered, aligning the upper frame with the lower frame. The half-frames are joined together so that the upper annular plate is located between the upper inner horizontal limiting rod of the upper inner pressure ring and the upper outer horizontal limiting rod of the middle pressure ring. The upper half-frame's frame side rods, upper inner pressure ring, middle pressure ring, upper outer pressure ring, upper outer horizontal limiting rod, upper inner horizontal limiting rod, upper leveling rod, and vertical limiting rod face downwards. The upper frame and the lower frame are fixed together by bolts; Adjust the upper inner horizontal limiting rod and the upper outer horizontal limiting rod so that the upper inner horizontal limiting rod presses against the inner edge of the upper annular plate and the upper outer horizontal limiting rod presses against the outer edge of the upper annular plate. Adjust the vertical limiting rods on the upper outer pressure ring and the upper leveling rod so that they press against the upper surface of the lower annular plate. Adjust the vertical limiting rods on the upper inner pressure ring and the middle pressure ring so that they press against the upper surface of the upper annular plate. The vertical clamping of the large annular component is achieved by the vertical limiting rods of the upper half frame and the hydraulic rods of the lower half frame. 4) Perform the first butt welding between the components of the inner ring assembly and the outer ring assembly of the lower ring flat plate assembly; The first welding is performed between the components of the upper annular flat plate assembly; Fillet welds are performed between the sandwich reinforcing rib assembly and the upper and lower annular flat plate assemblies; Double-sided welding is performed between the components of the annular vertical plate assembly; Double-sided welding is performed on the annular vertical plate assembly and the upper and lower annular flat plate assemblies; 5) Transfer the tilting fixture and large ring-shaped component to the tilting area. The crane lifts the tilting fixture and large ring-shaped component through the tilting lugs and uses a winch to provide tilting power. The winch connection point is located on the fixed layer side bar on both sides of the tilting axis of the upper and lower half frame. 6) After the first flipping of the flipping fixture and the large ring-shaped component is completed, place it on the support platform and continue to perform the second butt welding between the inner ring component and the outer ring component of the lower ring plate assembly, and continue to perform the second butt welding between the components of the upper ring plate assembly. 7) Flip the flipping fixture and the large ring-shaped component again, and continue to perform the third butt welding between the inner ring component and the outer ring component of the lower ring plate assembly, and continue to perform the third butt welding between the components of the upper ring plate assembly. Multiple flips are performed starting from the first flip to complete all welding; 8) Remove the bolts connecting the upper and lower frame sides, and adjust the upper inner and upper outer horizontal limiting rods so that the upper inner horizontal limiting rod is away from the inner edge of the upper annular plate, and the upper outer horizontal limiting rod is away from the outer edge of the upper annular plate. Lift the upper frame; Adjust the lower inner horizontal limit rod and the lower outer horizontal limit rod so that the lower inner horizontal limit rod moves away from the inner edge of the lower annular plate and the lower outer horizontal limit rod moves away from the outer edge of the lower annular plate. Then, lift the large ring-shaped component out of the lower frame.

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