A welding fixture and welding method for preventing deformation of inner parts of a thin-walled container.

Abstract

This invention discloses a welding anti-deformation fixture and welding method for welding internal components of a thin-walled container. The welding anti-deformation fixture includes: at least one welding anti-deformation structure, which is horizontally disposed inside the cylinder of the thin-walled container to provide radial support force to the cylinder in the entire circumferential direction; the welding anti-deformation structure includes a central support ring and multiple support blocks, which are disposed on the outer ring of the central support ring and spaced apart along the circumferential direction of the outer ring; each support block is abutted and fixed to the internal component to be welded inside the cylinder. This invention has the advantages of convenient assembly and effectively reducing welding deformation of the cylinder and the internal component.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding fixture and welding method for preventing deformation of thin-walled container inner parts. Background Technology

[0002] For large, thin-walled stainless steel containers, deformation can easily occur when welding internal components onto the inner wall of the container. For example... Figure 1 As shown, the inner wall of the cylinder 10 requires welding of internal components including at least 8 grid limit seats 20 and at least 8 corner limit seats 30, totaling 32 long welds. For example, a weld with a length of 4530mm can be used.

[0003] During the welding process, the above-mentioned welded internals are prone to the following deformations: like Figure 2 As shown, during the welding process of the grid limit seat (U-shaped seat) 20 and the inner wall of the cylinder 10, the grid limit seat 20 is prone to lateral flipping and displacement, and the straightness is deviated. That is, the welding shrinkage on both sides of the U-shaped seat causes the U-shaped seat to deform outward.

[0004] like Figure 3 As shown, during the welding process between the corner limit seat 30 and the inner wall of the cylinder 10, the straight section of the corner limit seat 30 is prone to bending angle deviation, that is, the welding shrinkage on both sides of the corner limit seat 30 will cause the support to deform to both sides.

[0005] like Figure 4 As shown, during the welding process of the grid limit seat 20 and the corner limit seat 30 to the inner wall of the cylinder 10, due to the large number of welds, the cylinder 10 is prone to deformation. This can result in localized bulges or defects with excessive ellipticity. Specifically, the welding shrinkage at the 32 weld seams of the 16 sets of welded internal components on the inner wall of the cylinder 10 will cause the cylinder to shrink and deform inwards at these locations. The other four locations (such as...) Figure 1 or Figure 4 (At position 40) it is squeezed outwards. If the above deformation defect occurs, the welded internal parts will not be able to be assembled into the container body 10. Summary of the Invention

[0006] The purpose of this invention is to provide a welding fixture and welding method for preventing deformation of internal components in thin-walled containers, in order to solve the problem that the large number of internal components to be welded in thin-walled containers easily leads to deformation of the container body and / or the internal components.

[0007] To solve the above problems, the present invention is achieved through the following technical solution: A welding deformation prevention fixture for thin-walled container inner parts includes: at least one welding deformation prevention structure, which is horizontally disposed inside the cylinder of the thin-walled container to provide radial support force to the cylinder in the entire circumferential direction. The welding deformation prevention structure includes a central support ring and a plurality of support blocks, the plurality of support blocks being disposed on the outer ring of the central support ring and spaced apart circumferentially along the outer ring of the central support ring; each support block is abutted and fixed to the inner part to be welded inside the cylinder.

[0008] Optionally, the welded internal components include: at least four sets of grid-type limiting seats and at least four sets of corner limiting seats, wherein the four sets of grid-type limiting seats and the four sets of corner limiting seats are distributed intermittently along the circumferential direction of the inner wall of the cylinder. The plurality of support blocks include: at least four sets of corner limiting seat support plates and at least four sets of grid-type limiting support plates. The four sets of corner limiting seat support plates and the four sets of grid-type limiting support plates are distributed intermittently along the circumferential direction of the central support ring. Each set of corner limiting seat support plates extends radially outward from the central support ring towards the outside of the cylinder, for radially supporting and fixing the corresponding corner limiting seat. Each set of grid-type limiting support plates extends radially outward from the central support ring towards the outside of the cylinder, for radially supporting and fixing the corresponding grid-type limiting seat.

[0009] Optionally, each set of corner limiting seat support plates includes two corner limiting seat support plates; each set of grid limiting support plates includes two grid limiting support plates.

[0010] Optionally, it further includes: a plurality of first cylindrical support plates and a plurality of second cylindrical support plates; each first cylindrical support plate is disposed between two corner limiting support plates in each group of corner limiting support plates. Each second cylindrical support plate is disposed between two grid limiting support plates in each group of grid limiting support plates. Each first cylindrical support plate and each second cylindrical support plate is used to radially support the inner wall of the cylindrical body.

[0011] Optionally, each of the grid limiting support plates has a first slot at one end near the inner wall of the cylinder for locking the grid limiting seat. Each of the corner limiting seat support plates has a second slot at one end near the inner wall of the cylinder for locking the corner limiting seat.

[0012] Optionally, it further includes: a plurality of fixing bolts, each of the fixing bolts being disposed on the bottom surface of the central support ring and extending radially along the central support ring, the fixing bolts being screwed out and pressing against the inner wall of the cylinder to fix the central support ring.

[0013] Optionally, it further includes: a lifting ring disposed on the top surface of the central support ring for lifting the central support ring into the interior of the cylinder.

[0014] Optionally, it further includes: a gasket made of the same material as the cylinder, the gasket being disposed between the first cylinder support plate and the inner wall of the cylinder; and a gasket disposed between the second cylinder support plate and the inner wall of the cylinder.

[0015] On the other hand, the present invention provides a welding method for welding internal components inside a thin-walled container, comprising: step S1, placing the thin-walled container vertically, placing the welding internal component to be welded inside the container, and spot welding to fix it.

[0016] Step S2: Provide the welding anti-deformation fixture for the inner parts of the thin-walled container cylinder as described above, and use a lifting device to hoist multiple welding anti-deformation structures into the cylinder, and arrange them at intervals along the axial direction of the cylinder; the welding anti-deformation structures are assembled from the bottom layer of the cylinder upwards, and adjacent welding anti-deformation structures are connected by support rods.

[0017] Step S3: Place the ladder in the middle of the welded anti-deformation structure. The assembly and welding personnel use the ladder to move up and down to weld all the welding components onto the inner wall of the cylinder.

[0018] Optionally, step S2 further includes: using a lifting device to hoist the central support ring into the cylinder using a lifting ring, unscrewing the four sets of fixing bolts on the central support ring to press against the inner wall of the cylinder, fixing the central support ring to the inner wall of the cylinder, and removing the lifting device.

[0019] Install the support block according to the actual position of the welding internals and the cylinder. After installation, and after it is tightly attached to the inner wall of the welding internals and the cylinder, weld the support block onto the central support ring. After all the welding anti-deformation structures are installed, weld at least 32 full-length welds of the welding internals.

[0020] This invention has at least one of the following technical effects: The welding anti-deformation fixture for thin-walled container inner parts provided by this invention has good overall integrity. Compared with the traditional strut structure, this support fixture supports the entire circumferential direction, preventing shrinkage deformation and elliptic formation.

[0021] The welding anti-deformation tooling for thin-walled container inner parts provided by the present invention has a simple structure and low manufacturing cost. It consists of a simple central support ring and support blocks, and is simple to manufacture and has low cost. The welding anti-deformation fixture for thin-walled container inner parts provided by the present invention takes into account both the lateral anti-deformation of the rounding support and grid limit support and the corner limit seat, and has good versatility.

[0022] The welding anti-deformation tooling for thin-walled container inner parts provided by the present invention has good adaptability, and the support plate is assembled according to the actual position.

[0023] When using the anti-deformation tooling for welding the inner parts of the thin-walled container provided by this invention, the thin-walled container body is placed in a vertical position; thus, assembly is more convenient, circumferential force is more uniform, and personnel can easily enter and exit.

[0024] The contact position between the first / second cylindrical support plate and the inner wall of the cylindrical body can be padded with a gasket, such as a stainless steel sheet, to prevent ferrite contamination.

[0025] The anti-deformation welding fixture for thin-walled container inner parts provided by the present invention can be equipped with a ladder at its center, allowing assembly and welding personnel to move up and down using the ladder. Attached Figure Description

[0026] Figure 1 A schematic diagram of a transverse cross-sectional structure of a thin-walled cylinder provided for the prior art; Figure 2 A schematic diagram illustrating the welding deformation trend of the U-shaped seat in the internal components of a thin-walled cylindrical body; Figure 3 A schematic diagram illustrating the trend of welding deformation in the supports of the internal components of a thin-walled cylindrical body; Figure 4 A schematic diagram illustrating the welding deformation trend in thin-walled cylinders; Figure 5 This is a schematic diagram of the structure of a welding anti-deformation tooling for thin-walled cylindrical internal parts provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the welding and anti-deformation tooling for thin-walled cylindrical internal components provided in an embodiment of the present invention. Detailed Implementation

[0027] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the anti-deformation welding fixture and welding method for thin-walled container inner parts proposed in this invention. The advantages and features of this invention will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0028] like Figure 5 and Figure 6 As shown, this embodiment provides a welding anti-deformation fixture for thin-walled container inner parts, including: at least one welding anti-deformation structure 50, which is horizontally disposed inside the cylinder 10 of the thin-walled container to provide radial support force for the cylinder 10 in the entire circumferential direction. The welding anti-deformation structure 50 includes a central support ring 500 and multiple support blocks (such as... Figure 5 As shown in reference numerals 501-505), a plurality of the support blocks are disposed on the outer ring of the central support ring 500 and are spaced apart circumferentially along the outer ring of the central support ring 500; each support block is connected to the welding internals to be welded within the cylinder 10 (such as...). Figure 6 (As shown in Figures 20-40) Abutment and fixation.

[0029] The anti-deformation welding fixture for thin-walled container inner parts provided in this embodiment has good overall integrity. Compared with the traditional strut structure, this support fixture supports the entire circumference, preventing shrinkage deformation and elliptic formation. The anti-deformation welding fixture for thin-walled container inner parts provided in this embodiment is a modular assembly structure, which is simple in structure and low in manufacturing cost. It consists of a simple central support ring and support blocks, making it simple and inexpensive to manufacture.

[0030] Please continue to refer to this. Figure 5 and Figure 6 As shown, the welded internal components include at least four sets of grid-type limiting seats and at least four sets of corner limiting seats. The four sets of grid-type limiting seats and the four sets of corner limiting seats are distributed alternately along the circumferential direction of the inner wall of the cylinder 10. Each set of grid-type limiting seats includes two grid-type limiting seats 20; each set of corner limiting seats includes two corner limiting seats 30. Preferably, the top view of the cross-section of the cylinder 10 is an axisymmetric and centrally symmetric figure.

[0031] The plurality of support blocks include at least four sets of corner limiting seat support plates and at least four sets of grid limiting support plates. The four sets of corner limiting seat support plates and the four sets of grid limiting support plates are distributed intermittently along the circumferential direction of the central support ring. Each set of corner limiting seat support plates extends radially outward from the central support ring towards the cylinder 10, serving to radially support and fix the corresponding corner limiting seat 30. Each set of grid limiting support plates extends radially outward from the central support ring towards the cylinder, serving to radially support and fix the corresponding grid limiting seat 20.

[0032] In this embodiment, each set of corner limiting seat support plates includes two corner limiting seat support plates 503; each set of grid limiting support plates includes two grid limiting support plates 501, but the present invention is not limited thereto.

[0033] In this embodiment, each of the grid limiting support plates 501 has a first slot 5010 at one end near the inner wall of the cylinder 10 for locking the grid limiting seat 20. Each of the corner limiting seat support plates 503 has a second slot 5030 at one end near the inner wall of the cylinder 10 for locking the corner limiting seat 30.

[0034] Please continue to refer to this. Figure 5 and Figure 6 As shown, the welded anti-deformation structure 50 further includes: a plurality of first cylindrical support plates 505 and a plurality of second cylindrical support plates 502; each first cylindrical support plate 505 is disposed between two corner limiting seat support plates 503 in each group of corner limiting seat support plates. Each second cylindrical support plate 502 is disposed between two grid limiting support plates 501 in each group of grid limiting support plates. Each first cylindrical support plate 505 and each second cylindrical support plate 502 is used to radially support the inner wall of the cylindrical body 10.

[0035] The welding anti-deformation fixture for thin-walled container inner parts provided in this embodiment takes into account both the support of the rounding and grid limit seat and the lateral anti-deformation of the corner limit seat, and has good versatility.

[0036] Please continue to refer to this. Figure 5 and Figure 6 As shown, the welded anti-deformation structure 50 also includes: a number of fixing bolts (such as... Figure 5 The first fixing bolt 5050 is disposed under the first cylindrical support plate 505, and the second fixing bolt 5020 is disposed under the second cylindrical support plate 502. Each fixing bolt is disposed on the bottom surface of the central support ring 500 and extends radially along the central support ring 500. The fixing bolt is screwed out and abuts against the inner wall of the cylindrical body 10 to fix the central support ring 500.

[0037] Please continue to refer to this. Figure 5 As shown, the welded anti-deformation structure 50 further includes a lifting ring 504, which is disposed on the top surface of the central support ring 500 and is used to lift the central support ring 500 into the interior of the cylinder 10.

[0038] Please continue to refer to this. Figure 6 As shown, the welding anti-deformation structure 50 further includes: a gasket 40, the material of which is the same as that of the cylinder 10, the gasket 40 being disposed between the first cylinder support plate 505 and the inner wall of the cylinder 10; and, disposed between the second cylinder support plate 502 and the inner wall of the cylinder 10.

[0039] In this embodiment, the thin-walled container body is made of stainless steel, with an outer diameter of Φ1660mm, a wall thickness of 16mm, and a length of 4530mm. This embodiment is suitable for auxiliary welding of the internal components of large thin-walled container bodies. The thin-walled container body can be used as a storage and transportation container for high-fuel-consumption spent fuel.

[0040] In this embodiment, the contact position between the first / second cylindrical support plate and the inner wall of the cylindrical body 10 can be shimmed with a gasket 40. For example, the gasket 40 is a stainless steel sheet, which can prevent the stainless steel cylindrical body 10 from generating ferrite contamination.

[0041] The grid limiting support plate 501, the corner limiting seat support plate 503, the second cylinder support plate 502 and the first cylinder support plate 505 provided in this embodiment are all roughly rectangular metal plates.

[0042] On the other hand, the present invention provides a welding method for welding internal components inside a thin-walled container, comprising: step S1, placing the thin-walled container vertically, placing the welding internal component to be welded inside the container, and spot welding to fix it.

[0043] Step S2: Provide the welding anti-deformation fixture for the inner parts of the thin-walled container cylinder as described above, and use a lifting device to hoist multiple welding anti-deformation structures into the cylinder, and arrange them at intervals along the axial direction of the cylinder; the welding anti-deformation structures are assembled from the bottom layer of the cylinder upwards, and adjacent welding anti-deformation structures are connected by support rods.

[0044] Step S3: Place the ladder in the middle of the welded anti-deformation structure. The assembly and welding personnel use the ladder to move up and down to weld all the welding components onto the inner wall of the cylinder.

[0045] Optionally, step S2 further includes: using a lifting device to hoist the central support ring into the cylinder using a lifting ring, unscrewing the four sets of fixing bolts on the central support ring to press against the inner wall of the cylinder, fixing the central support ring to the inner wall of the cylinder, and removing the lifting device.

[0046] Install the support block according to the actual position of the welding internals and the cylinder. After installation, and after it is tightly attached to the inner wall of the welding internals and the cylinder, weld the support block onto the central support ring. After all the welding anti-deformation structures are installed, weld at least 32 full-length welds of the welding internals.

[0047] Preferably, please continue to refer to Figure 6 As shown, after all the welding anti-deformation structures are installed, strapping pieces 506 can be installed on the outside of the cylinder 10 along the circumferential direction to further prevent the cylinder 10 from deforming.

[0048] The anti-deformation welding fixture for thin-walled container inner parts provided in this embodiment has good adaptability, and the support plate is assembled according to the actual position.

[0049] When using the anti-deformation tooling for welding the inner parts of the thin-walled container provided in this embodiment, the thin-walled container body is placed in a vertical position; this makes assembly more convenient, ensures uniform circumferential force, and facilitates personnel entry and exit.

[0050] The anti-deformation welding fixture for thin-walled container inner parts provided in this embodiment can be equipped with a ladder at its center, allowing assembly and welding personnel to move up and down using the ladder.

[0051] The anti-deformation welding fixture for thin-walled container inner parts provided in this embodiment is a set of support fixtures used to prevent deformation of the inner parts and the cylinder during welding and stress-relieving heat treatment. The fixture is supported on the inner wall of the cylinder and can preferably be divided into 4 layers, which is convenient for assembly and effectively reduces the welding deformation of the cylinder and welded inner parts.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] In the description of this invention, it should be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0054] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A welding anti-deformation tooling for thin-walled container inner parts, characterized in that, include: At least one welded anti-deformation structure is horizontally disposed inside the cylinder of the thin-walled container to provide radial support force to the cylinder in the entire circumferential direction; The welding anti-deformation structure includes a central support ring and multiple support blocks. The multiple support blocks are disposed on the outer ring of the central support ring and are spaced apart along the circumferential direction of the outer ring of the central support ring. Each of the aforementioned support blocks is fixed in contact with the welding internals to be welded inside the cylinder; The welding internals include: At least four sets of grid-type limiting seats and at least four sets of corner limiting seats are provided, and the at least four sets of grid-type limiting seats and the at least four sets of corner limiting seats are distributed intermittently along the circumferential direction of the inner wall of the cylinder. The plurality of support blocks include: at least 4 sets of corner limiting seat support plates and at least 4 sets of grid limiting support plates; The at least four sets of corner limiting seat support plates and the at least four sets of grid limiting support plates are distributed intermittently along the circumferential direction of the central support ring; Each set of corner limiting seat support plates extends radially outward from the central support ring to radially support and fix the corresponding corner limiting seat; Each set of grid limiting support plates extends radially outward from the cylinder along the central support ring, and is used to radially support and fix the corresponding grid limiting seat; Each of the grid limiting support plates is provided with a first slot at one end near the inner wall of the cylinder, for locking the grid limiting seat; Each of the corner limiting seat support plates has a second slot at one end near the inner wall of the cylinder, which is used to lock the corner limiting seat.

2. The anti-deformation welding fixture for thin-walled container inner parts as described in claim 1, characterized in that, Each set of corner limiting seat support plates includes: two corner limiting seat support plates; Each set of grid limiting support plates includes: two grid limiting support plates.

3. The anti-deformation welding fixture for thin-walled container inner parts as described in claim 2, characterized in that, Also includes: Several first cylinder support plates and several second cylinder support plates; Each of the first cylindrical support plates is disposed between two corner limit seat support plates in each group of corner limit seat support plates; Each of the second cylinder support plates is disposed between two grid limit support plates in each group of grid limit support plates; Each of the first cylindrical support plate and the second cylindrical support plate is used to radially support the inner wall of the cylindrical body.

4. The anti-deformation welding fixture for thin-walled container inner parts as described in claim 3, characterized in that, Also includes: A plurality of fixing bolts are provided, each fixing bolt being disposed on the bottom surface of the central support ring and extending radially along the central support ring. The fixing bolts are screwed out and pressed against the inner wall of the cylinder to fix the central support ring.

5. The anti-deformation welding fixture for thin-walled container inner parts as described in claim 4, characterized in that, Also includes: A lifting ring, which is disposed on the top surface of the central support ring, is used to lift the central support ring into the interior of the cylinder.

6. The anti-deformation welding fixture for thin-walled container inner parts as described in claim 5, characterized in that, Also includes: A gasket, the gasket being made of the same material as the cylinder, is disposed between the first cylinder support plate and the inner wall of the cylinder; and is disposed between the second cylinder support plate and the inner wall of the cylinder.

7. A welding method for welding internal components inside a thin-walled container, characterized in that, include: Step S1: Place the cylinder of the thin-walled container vertically, place the welding internals to be welded inside the cylinder, and spot weld them in place. Step S2: Provide a welding anti-deformation fixture for thin-walled container cylinder internal parts as described in any one of claims 5 or 6; use a lifting device to hoist multiple welding anti-deformation structures into the cylinder, and arrange them at intervals along the axial direction of the cylinder; the welding anti-deformation structures are assembled from the bottom layer of the cylinder upwards, and adjacent welding anti-deformation structures are connected by support rods; Step S3: Place the ladder in the middle of the welded anti-deformation structure. The assembly and welding personnel use the ladder to move up and down to weld all the welding components onto the inner wall of the cylinder.

8. The welding method for the internal components of a thin-walled container as described in claim 7, characterized in that, Step S2 further includes: using a lifting device to hoist the central support ring into the cylinder using a lifting ring, unscrewing the four sets of fixing bolts on the central support ring to press against the inner wall of the cylinder, fixing the central support ring to the inner wall of the cylinder, and removing the lifting device; Install the support block according to the actual position of the welding internals and the cylinder. After installation, and after it is tightly attached to the inner wall of the welding internals and the cylinder, weld the support block onto the central support ring. After all the welding anti-deformation structures are installed, weld at least 32 full-length welds of the welding internals.

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