Vacuum chamber segment welding apparatus and method

Abstract

The present application relates to the field of fusion reactor vacuum chamber riveting welding, and discloses a vacuum chamber sectional welding device and a welding method, the vacuum chamber sectional welding device comprising: side plates, partition plates, limiting plates and limiting components, the side plates are two and are arranged at intervals in a first direction; the partition plates are multiple and are arranged between the two side plates, the top surfaces of the partition plates and the top surfaces of the side plates are all arc surfaces and are coplanar, and the top surfaces of the multiple partition plates and the top surfaces of the two side plates jointly form an arc-shaped support surface; each partition plate is provided with multiple limiting plates, the multiple limiting plates are arranged at intervals in the arc length direction of the top surface of the partition plate, and each limiting plate is provided with a support column positioning groove; and each side plate is provided with a limiting component at an end away from the partition plate, and the limiting component is used for limiting the two ends of the arc-shaped support surface in the first direction. The vacuum chamber sectional welding device can fix the vacuum chamber section, ensure the position accuracy and contour accuracy of the support column on the curved surface shell after welding, and improve the reliability of the vacuum chamber section.

Description

Technical Field

[0001] This invention relates to the field of welding technology for vacuum chambers in fusion reactors, and in particular to a welding apparatus and welding method for segmenting vacuum chambers. Background Technology

[0002] The vacuum chamber is a closed container for plasma movement in a fusion reactor. It has a D-ring structure with internal support structures welded to a curved shell. The vacuum chamber sector is divided into several sections, each with a hyperboloid structure, assembled from a hyperboloid shell and cylindrical support columns. Achieving rapid positioning of the support columns on the shell is very challenging, requiring precise control of both positional and profile accuracy, with deviations within tolerance limits. After the sections are riveted together, they need to be welded into a whole. This process again requires controlling profile deviations. Therefore, a high-precision riveting and welding device is urgently needed for the segmented riveting and welding of the vacuum chamber and its ring-like assembly. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a welding device for vacuum chamber segments, which can fix the vacuum chamber segments, improve the positional and contour accuracy of the support columns after welding on the curved shell, and improve the reliability of the vacuum chamber segments.

[0004] The present invention also aims to provide a welding method for vacuum chamber segments, using the aforementioned vacuum chamber segment welding apparatus.

[0005] A welding apparatus for segmenting a vacuum chamber according to an embodiment of the present invention includes: two side plates spaced apart in a first direction; multiple partitions disposed between the two side plates, the multiple partitions spaced apart in a second direction perpendicular to the first direction, the top surfaces of the partitions and the side plates being arc-shaped and coplanar, the top surfaces of the multiple partitions and the top surfaces of the two side plates forming an arc-shaped support surface; a limiting plate, each partition having multiple limiting plates spaced apart in the arc length direction of the top surface of the partition, each limiting plate having a support column positioning groove; and a limiting component, each side plate having a limiting component at one end away from the partition, the limiting component being used to limit the two ends of the arc-shaped support surface in the first direction.

[0006] According to the welding apparatus for vacuum chamber segmentation of the present invention, the curved shell can be stably fixed by the arc-shaped support surface and the limiting component. By setting the support column on the corresponding support column positioning groove, the support column can be quickly positioned on the curved shell, and the displacement of the support column in the axial and radial directions can be restricted, so as to avoid the relative position and angle of the support column and the curved shell changing during the welding process, thereby improving the positional accuracy and contour accuracy of the support column and further improving the reliability of the welding apparatus for vacuum chamber segmentation.

[0007] In some embodiments of the present invention, the limiting plate includes a first plate and a second plate that are vertically connected. The first plate is connected to the partition, and the second plate is disposed on the side of the first plate near the arc-shaped support surface and is provided with the support column positioning groove.

[0008] In some embodiments of the present invention, the first plate is provided with a plurality of first holes, the partition is provided with a plurality of second holes, the plurality of second holes and the plurality of first holes are arranged in a one-to-one correspondence, and each second hole and the corresponding first hole is provided with a first bolt, the first bolt being used to lock the first plate to the partition.

[0009] In some embodiments of the present invention, a plurality of first holes and a plurality of second holes are provided in multiple groups in the vertical direction, and each group of first holes and second holes is provided in at least two in the first direction, wherein the vertical direction is perpendicular to the first direction and the second direction.

[0010] In some embodiments of the present invention, the two ends of the side plate in the second direction are provided with a plurality of third holes, and the plurality of third holes are arranged in at least two groups along the arc length direction of the top surface of the side plate. Each group of third holes is provided with at least two third holes in the vertical direction, and the vertical direction is perpendicular to the first direction and the second direction.

[0011] In some embodiments of the present invention, the limiting component includes a plurality of limiting units, which are spaced apart in the second direction of the side plate.

[0012] In some embodiments of the present invention, the limiting unit includes a positioning plate and a wedge block. The positioning plate includes a first part and a second part that are perpendicularly connected to each other. The first part is connected to the side plate, and the second part is disposed on the side of the arc-shaped support surface away from the partition. The wedge block is in close contact with the side of the second part near the arc-shaped support surface.

[0013] In some embodiments of the present invention, the second part has a positioning surface on the side near the arc-shaped support surface, and the distance between the positioning surface and the top surface of the side plate gradually decreases in the direction of the partition plate toward the side plate, and the thickness of the wedge block gradually decreases in the second direction.

[0014] In some embodiments of the present invention, the first part is provided with a clearance groove near the positioning surface.

[0015] According to an embodiment of the present invention, a welding method for a vacuum chamber segment is provided. The vacuum chamber segment is welded using the welding apparatus for vacuum chamber segmentation described in any of the preceding claims. The vacuum chamber segment includes a curved shell and support columns. The curved shell has multiple through holes, and there are multiple support columns, each corresponding to one of the multiple through holes. Each support column is installed within a corresponding through hole. The welding method includes: processing a double-sided bevel at the welding position of the curved shell and the support columns; placing the curved shell on the arc-shaped support surface and aligning the edges of the curved shell and the arc-shaped support surface; limiting the two ends of the curved shell in a first direction using the limiting component; then passing the multiple support columns from top to bottom through the corresponding through holes and supporting them in the corresponding support column positioning grooves; and welding the support columns and the curved shell, including: setting a first welding torch on the upper side of the double-sided bevel, applying an electric arc, and feeding wire. Next, a second welding torch is placed below the double-sided bevel, an electric arc is applied and an inert shielding gas is supplied to complete the first layer of root pass welding; both the first and second welding torches are applied with an electric arc and wire fed for welding, and the second and third layers of root pass welding are completed in sequence; after the root pass welding is completed, filler welding is performed, one of the first and second welding torches is applied with an electric arc and wire fed for welding, and after completing one layer of filler welding on one side of the double-sided bevel, the other is switched to apply an electric arc and wire fed for filler welding at the corresponding filler weld position on the other side, and after welding is completed, the welding torch is switched again for welding, and so on, welding is performed alternately on both sides of the double-sided bevel using the first and second welding torches until the bevel position of the double-sided bevel is reached; after the welding of the two vacuum chamber segments is completed, the welding devices of the two vacuum chamber segments are connected by connecting beams and splicing plates, and the splicing position of the two vacuum chamber segments is welded.

[0016] According to the welding method for vacuum chamber segments of the present invention, by sequentially performing a first-layer root pass weld, a second-layer root pass weld, a third-layer root pass weld, and multiple filler welds on the support column and the curved shell, the connection strength between the support column and the curved shell can be guaranteed, the weld quality can be guaranteed, and the welding efficiency can be improved. It can also balance the stress on both sides of the double-sided bevel, avoid deformation of the support column and the curved shell, improve the contour accuracy of the support column, and improve the welding quality of the vacuum chamber segments.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 A three-dimensional structural diagram of a vacuum chamber segmented welding apparatus provided in some embodiments of the present invention. Figure 1 ;

[0020] Figure 2 A three-dimensional structural diagram of a vacuum chamber segmented welding apparatus provided in some embodiments of the present invention. Figure 2 ;

[0021] Figure 3 A three-dimensional structural diagram of a segmented vacuum chamber provided for some embodiments of the present invention;

[0022] Figure 4 A schematic diagram of a welding apparatus for vacuum chamber segments and a vacuum chamber segment assembly provided for some embodiments of the present invention;

[0023] Figure 5 A three-dimensional structural diagram of the cooperation between the limiting plate and the support column provided in some embodiments of the present invention;

[0024] Figure 6 A schematic diagram of the assembled structure of the welding device for two vacuum chamber segments provided in some embodiments of the present invention;

[0025] Figure 7 for Figure 2 A magnified view of a portion of point I;

[0026] Figure 8 This is a flowchart of a welding method for vacuum chamber segments according to some embodiments of the present invention;

[0027] Figure 9 This is a schematic diagram of the welded structure of the curved shell and support column in some embodiments of the present invention. Figure 1 ;

[0028] Figure 10 This is a schematic diagram of the welded structure of the curved shell and support column in some embodiments of the present invention. Figure 2 ;

[0029] Figure 11 This is a schematic diagram of the welded structure of the curved shell and support column in some embodiments of the present invention. Figure 3 ;

[0030] Figure 12 This is a schematic diagram of the welded structure of the curved shell and support column in some embodiments of the present invention. Figure 4 ;

[0031] Figure 13This is a schematic diagram of the welded structure of the curved shell and support column in some embodiments of the present invention. Figure 5 .

[0032] Figure label:

[0033] 100. Welding apparatus for vacuum chamber segments;

[0034] 10. Side plate; 10a. Third hole;

[0035] 20. Partition plate; 20a. Curved support surface;

[0036] 30. Limiting plate; 30a. Support column positioning groove; 31. First plate; 31a. First hole; 32. Second plate; 33. First bolt;

[0037] 40. Limiting component; 41. Limiting unit; 411. Positioning plate; 4111. First part; 4111a. Clearance groove; 4112. Second part; 4112a. Positioning surface; 412. Wedge block;

[0038] 200. Vacuum chamber segmentation; 201. First layer root pass weld; 202. Second layer root pass weld; 203. Third layer root pass weld; 204. Fill weld; 210. Curved shell; 210a. Through hole; 220. Support column;

[0039] 300, First welding gun; 400, Second welding gun; 500, Welding wire; 600, Connecting beam; 700, Splicing plate. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0043] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The following is for reference. Figures 1-7 This describes a welding apparatus 100 for segmenting a vacuum chamber according to an embodiment of the present invention.

[0046] like Figures 1 to 4 As shown, the vacuum chamber segmented welding device 100 of this embodiment includes: side plates 10, partitions 20, limiting plates 30, and limiting components 40. There are two side plates 10, spaced apart in a first direction; there are multiple partitions 20, disposed between two side plates 10, spaced apart in a second direction perpendicular to the first direction. The top surfaces of the partitions 20 and the side plates 10 are both arc-shaped and coplanar. The top surfaces of the multiple partitions 20 and the two side plates 10 together form an arc-shaped support surface 20a. Each partition 20 is provided with multiple limiting plates 30, spaced apart along the arc length direction of the top surface of the partition 20. Each limiting plate 30 is provided with a support column positioning groove 30a. Each side plate 10 has a limiting component 40 at one end away from the partition 20, which limits the two ends of the arc-shaped support surface 20a in the first direction.

[0047] First, it should be noted that the vacuum chamber segment 200 mentioned in the embodiments of the present invention may include a curved shell 210 and a support column 220. The curved shell 210 is provided with a plurality of through holes 210a, and there are a plurality of support columns 220. The plurality of support columns 220 and the plurality of through holes 210a correspond one-to-one. Each support column 220 is installed in the corresponding through hole 210a. The support column 220 is used to support the shielding cladding in the nuclear fusion device.

[0048] Side plates 10 can refer to the plates disposed at both ends of the welding device 100 in the first direction of the vacuum chamber segment, and can be, but is not limited to, alloy steel, stainless steel, aluminum alloy, and composite materials, etc. Here, as an example, "first direction" can refer to... Figure 1 The left and right directions.

[0049] Partition 20 can refer to a plate connecting two side plates 10. There are multiple partitions 20, which are spaced apart in the second direction. The number of partitions 20 can be, but is not limited to, two, three, four, five, six, etc. For example, refer to Figure 1 There are five partitions 20. The top surfaces of both partitions 20 and side plates 10 are curved and coplanar, forming a curved support surface 20a. This curved support surface 20a matches the inner surface of the curved shell 210, allowing the curved shell 210 to be placed on the curved support surface 20a. The curved shell 210 and the curved support surface 20a are in close contact, providing stable support for the curved shell 210. The term "second direction" can be referenced... Figure 1 The front and back directions.

[0050] The limiting plate 30 refers to a component that restricts the displacement of the support column 220. Each partition 20 is provided with multiple limiting plates 30, which are spaced apart along the arc length of the top surface of the partition 20. Each limiting plate 30 is provided with a support column positioning groove 30a. The number of support column positioning grooves 30a is equal to the number of support columns 220, and the support column positioning groove 30a is located directly below the corresponding support column 220. When the support column 220 is placed on the corresponding support column positioning groove 30a, the support column 220 can be precisely positioned and supported, and its displacement in the axial and radial directions can be restricted. The support column positioning groove 30a can be, but is not limited to, circular, polygonal, irregular, etc. For example, refer to... Figure 1 The support column positioning groove 30a is circular, matching the shape of the support column 220, providing stable support and limiting the position of the support column 220. The width of the support column positioning groove 30a can be within a tolerance of 1 ± 0.5 mm to facilitate the insertion of the support column 220, and the machining depth of the support column positioning groove 30a can be within a tolerance of ± 0.5 mm.

[0051] The limiting component 40 can refer to the component that limits the displacement of the curved shell 210. Multiple limiting components 40 can be provided, distributed at both ends of the arc-shaped support surface 20a in the first direction, and abut against the curved shell 210 to limit the displacement of the curved shell 210, so that the curved shell 210 is stably fixed on the arc-shaped support surface 20a.

[0052] In the above technical solution, the curved shell 210 is placed on the arc-shaped support surface 20a, and the control limiting component 40 fixes the curved shell 210, limiting its displacement. Then, the support column 220 passes through the through hole 210a, so that the support column 220 abuts against the bottom wall of the support column positioning groove 30a, limiting the axial and radial displacement of the support column 220 and preventing changes in the relative position and angle between the support column 220 and the curved shell 210 during the welding process. Since multiple support columns 220 can achieve precise positioning on the curved shell 210, the deformation control of the support columns 220 relative to the curved shell 210 can be well guaranteed during the subsequent welding process. After welding, the multiple support columns 220 can still maintain higher precision on the curved shell 210.

[0053] According to an embodiment of the present invention, the welding apparatus 100 for vacuum chamber segmentation can stably fix the curved shell 210 by means of the arc-shaped support surface 20a and the limiting component 40. By setting the support column 220 on the corresponding support column positioning groove 30a, the support column 220 can be quickly positioned on the curved shell 210, the displacement of the support column 220 in the axial and radial directions can be restricted, and the relative position and angle of the support column 220 and the curved shell 210 can be avoided from changing during the welding process. This improves the positional accuracy and contour accuracy of the support column 220 and enhances the reliability of the welding apparatus 100 for vacuum chamber segmentation.

[0054] In some embodiments of the present invention, reference is made to Figure 1 and Figure 5 The limiting plate 30 includes a first plate 31 and a second plate 32 vertically connected. The first plate 31 is connected to the partition 20, and the second plate 32 is located on the side of the first plate 31 near the arc-shaped support surface 20a and has a support column positioning groove 30a. In the above technical solution, the first plate 31 can contact and connect with the partition 20, which can increase the contact area between the limiting plate 30 and the support column 220, improve the connection strength between the limiting plate 30 and the support column 220, ensure that the limiting plate 30 can stably support the support column 220, and improve the limiting reliability of the limiting plate 30.

[0055] In some embodiments of the present invention, reference is made to Figure 1 and Figure 5 The first plate 31 has multiple first holes 31a, and the partition 20 has multiple second holes (not shown in the figure). The multiple second holes and the multiple first holes 31a are arranged in a one-to-one correspondence. Each second hole and its corresponding first hole 31a is provided with a first bolt 33. The first bolt 33 is used to lock the first plate 31 to the partition 20. The number of first bolts 33, first holes 31a and second holes can be, but is not limited to, two, three, four, five, etc.

[0056] In the above technical solution, the first bolt 33 is used to lock the first plate 31 to the partition 20, which facilitates the installation, disassembly and maintenance of the limiting plate 30, avoids the entire welding device 100 of the vacuum chamber segment being scrapped due to damage to the limiting plate 30, and reduces costs.

[0057] In some embodiments of the present invention, reference is made to Figure 1 and Figure 5 Multiple sets of first holes 31a and multiple sets of second holes are provided in the vertical direction. Each set has at least two first holes 31a and two second holes in the first direction, and the vertical direction is perpendicular to the first and second directions. In the above technical solution, by providing multiple sets of first holes 31a and second holes in the vertical direction, and fixing them with first bolts 33, the pressure of the support column 220 on the limiting plate 30 can be effectively distributed, avoiding excessive force on a single bolt that could lead to loosening or deformation of the connection, improving the stability and structural strength of the connection between the limiting plate 30 and the partition plate 20, and further improving the reliability of the limiting plate 30.

[0058] In some embodiments of the present invention, reference is made to Figure 4 and Figure 6 The side plate 10 has multiple third holes 10a at both ends in the second direction. The multiple third holes 10a are arranged in at least two groups along the arc length of the top surface of the side plate 10. Each group of third holes 10a has at least two third holes 10a in the vertical direction, which is perpendicular to the first and second directions. The number of third holes 10a can be, but is not limited to, two, three, four, five, etc.

[0059] In the above technical solution, the setting of multiple third holes 10a can be used to connect the connecting beam 600 and the splicing plate 700 to realize the splicing of the welding device 100 of the two vacuum chamber segments, thereby facilitating the welding of the splicing seam of the two vacuum chamber segments 200 and improving the versatility of the welding device 100 of the vacuum chamber segments.

[0060] In some embodiments of the present invention, reference is made to Figure 1 , Figure 2 and Figure 4 The limiting component 40 includes a plurality of limiting units 41, which are spaced apart in the second direction of the side plate 10.

[0061] The number of limiting units 41 can be, but is not limited to, two, three, four, five, etc. In the above technical solution, multiple limiting units 41 are spaced apart in the second direction of the side plate 10, which can increase the contact area between the limiting component 40 and the vacuum chamber segment 200, improve the reliability of fixing the vacuum chamber segment 200, and also limit the vacuum chamber segment 200 from multiple angles, further improving the reliability of fixing the vacuum chamber segment 200. The above solution also helps to reduce the amount of material used in the limiting component 40, which can reduce costs and weight, and facilitate transportation and use.

[0062] In some embodiments of the present invention, reference is made to Figure 7 The limiting unit 41 includes a positioning plate 411 and a wedge block 412. The positioning plate 411 includes a first part 4111 and a second part 4112 that are perpendicularly connected to each other. The first part 4111 is connected to the side plate 10. The second part 4112 is located on the side of the arc-shaped support surface 20a away from the partition plate 20. The wedge block 412 is in close contact with the side of the second part 4112 near the arc-shaped support surface 20a.

[0063] In the above technical solution, the first part 4111 is connected to the side plate 10, providing a stable mounting base for the limiting unit 41. The second part 4112 extends to the edge of the arc-shaped support surface 20a, and its side near the arc-shaped support surface 20a is in close contact with the wedge block 412. By adjusting the position of the wedge block 412, the wedge block 412 can be tightly abutted against the end edge of the curved shell 210, limiting the displacement of the curved shell 210. This ensures that the relative position of the curved shell 210 and the arc-shaped support surface 20a remains fixed during the welding process, avoiding the displacement of the curved shell 210 due to welding stress or external disturbances, and further improving the reliability of the vacuum chamber segmented welding device 100. At the same time, the limiting unit 41 has a simple structure, which can improve the durability of the limiting unit 41.

[0064] In some embodiments of the present invention, reference is made to Figure 7 The second part 4112 has a positioning surface 4112a on the side near the arc-shaped support surface 20a. In the direction of the partition 20 toward the side plate 10, the distance between the positioning surface 4112a and the top surface of the side plate 10 gradually decreases, and in the second direction, the thickness of the wedge block 412 gradually decreases.

[0065] In the above technical solution, by the thickness variation trend of the wedge block 412 and the gradual decrease in the distance between the positioning surface 4112a and the top surface of the side plate 10 in the direction of the partition plate 20 toward the side plate 10, the wedge block 412 is driven to move, so that the wedge block 412 and the positioning surface 4112a can form a tight fit. As the wedge block 412 goes deeper, the positioning surface 4112a gives the wedge block 412 a squeezing force toward the curved shell 210, which makes the wedge block 412 and the curved shell 210 more tightly abut, improves the limiting effect on the curved shell 210, and ensures the welding accuracy.

[0066] In some embodiments of the present invention, reference is made to Figure 7 The first part 4111 is provided with a clearance groove 4111a near the positioning surface 4112a. In the above technical solution, the clearance groove 4111a can provide sufficient operating space for the installation and adjustment of the wedge block 412, avoid interference between the first part 4111 and the wedge block 412 during installation or movement, and ensure that the wedge block 412 can slide smoothly along the positioning surface 4112a to achieve the tightening and limiting of the curved shell 210.

[0067] The following is combined Figures 1 to 8 This describes a specific embodiment of the welding apparatus 100 for vacuum chamber segmentation of the present invention.

[0068] The vacuum chamber segmented welding device 100 includes: a side plate 10, a partition 20, a limiting plate 30, and a limiting component 40.

[0069] The side plate 10 has multiple third holes 10a at both ends in the second direction. The multiple third holes 10a are arranged in at least two groups along the arc length of the top surface of the side plate 10. Each group of third holes 10a has at least two holes in the vertical direction, which is perpendicular to the first and second directions.

[0070] There are multiple partitions 20 and they are disposed between two side plates 10. The multiple partitions 20 are spaced apart in a second direction, which is perpendicular to the first direction. The top surface of the partition 20 and the top surface of the side plate 10 are both arc-shaped and coplanar. The top surfaces of the multiple partitions 20 and the top surfaces of the two side plates 10 together form an arc-shaped support surface 20a.

[0071] The limiting plate 30 includes a first plate 31 and a second plate 32 connected vertically. The first plate 31 is connected to the partition 20, and the second plate 32 is located on the side of the first plate 31 near the arc-shaped support surface 20a and has a support column positioning groove 30a. The first plate 31 has multiple first holes 31a, and the partition 20 has multiple second holes. The multiple second holes and the multiple first holes 31a are arranged in a one-to-one correspondence. Each second hole and its corresponding first hole 31a is provided with a first bolt 33, which is used to lock the first plate 31 to the partition 20. The multiple first holes 31a and the multiple second holes are arranged in multiple groups in the vertical direction. Each group of first holes 31a and second holes has at least two in the first direction, and the vertical direction is perpendicular to the first and second directions.

[0072] The limiting component 40 includes multiple limiting units 41, which are spaced apart in the second direction of the side plate 10. Each limiting unit 41 includes a positioning plate 411 and a wedge block 412. The positioning plate 411 includes a first part 4111 and a second part 4112 that are perpendicularly connected to each other. The first part 4111 is connected to the side plate 10, and the second part 4112 is located on the side of the arc-shaped support surface 20a away from the partition 20. The wedge block 412 is in close contact with the side of the second part 4112 near the arc-shaped support surface 20a. The first part 4111 has a clearance groove 4111a near the positioning surface 4112a. The second part 4112 has a positioning surface 4112a near the arc-shaped support surface 20a. In the direction from the partition 20 to the side plate 10, the distance between the positioning surface 4112a and the top surface of the side plate 10 gradually decreases, and in the second direction, the thickness of the wedge block 412 gradually decreases.

[0073] like Figure 4 , Figure 6 , Figures 8 to 13 As shown, according to an embodiment of the present invention, a welding method for a vacuum chamber segment 200 is provided. The vacuum chamber segment 200 is welded using the welding apparatus 100 of any of the preceding embodiments. The vacuum chamber segment 200 includes a curved shell 210 and support columns 220. The curved shell 210 is provided with a plurality of through holes 210a. There are a plurality of support columns 220, and the plurality of support columns 220 correspond one-to-one with the plurality of through holes 210a. Each support column 220 is installed in a corresponding through hole 210a. The welding method for the vacuum chamber segment 200 of this embodiment of the present invention includes:

[0074] Step S1: Machining a double-sided bevel at the welding position between the curved shell 210 and the support column 220. Machining the double-sided bevel facilitates welding on both sides of the curved shell 210 and the support column 220.

[0075] Step S2: Place the curved shell 210 on the arc-shaped support surface 20a, align the edge of the curved shell 210 with the edge of the arc-shaped support surface 20a, limit the two ends of the curved shell 210 in the first direction through the limiting component 40, and then pass multiple support columns 220 from top to bottom through the corresponding through holes 210a and support them in the corresponding support column positioning grooves 30a.

[0076] Step S3: Welding the support column 220 and the curved shell 210, including:

[0077] Step S31, Reference Figure 9 A first welding torch 300 is set on the upper side of the double-sided bevel to apply an electric arc and feed wire for welding, and a second welding torch 400 is set on the lower side of the double-sided bevel to apply an electric arc and supply inert shielding gas to complete the first layer of root pass 201. In this design, a first welding torch 300 is installed on the upper side of the double-sided bevel, applying an electric arc and feeding welding wire 500 for welding. This allows welding to be performed on the upper side of the double-sided bevel, while an electric arc is applied to the lower side of the double-sided bevel. This allows the lower electric arc to provide heat to the root of the first layer root pass weld 201, ensuring that the bottom of the weld can be fully melted and guaranteeing the reliability of the first layer root pass weld 201. If welding wire 500 is also fed to the lower side of the double-sided bevel, the weld thickness of the first layer root pass weld 201 is relatively small, and the molten pools on both sides overlap to form a common molten pool. Therefore, the weld pool at this time is larger than when welding on one side alone, which can easily lead to the solder not being able to adhere, increasing the possibility of molten metal flowing downwards and causing the first layer root pass weld 201 to fail. Therefore, by using the first welding torch 300 on the upper side to apply an electric arc and feed welding wire, while the second welding torch 400 only applies an electric arc and supplies inert shielding gas, the dripping of molten metal can be avoided. In addition, the second welding torch 400 delivers inert shielding gas, which can protect the first root pass 201 and further improve the reliability of the first root pass 201.

[0078] Step S32, Reference Figure 10 The first welding torch 300 and the second welding torch 400 are both applied with electric arcs and wires fed for welding, sequentially completing the second root pass 202 and the third root pass 203. The first root pass 201 is already stable, effectively isolating both sides of the double-sided bevel and providing support for the accumulation of molten metal in the subsequent second and third root passes 202 and 203. Therefore, welding wire 500 can be fed from both sides of the double-sided bevel, which improves welding efficiency and allows each weld root to provide heat to the other, ensuring better fusion between the weld root and the base material, thus improving the reliability of the second and third root passes 202 and 203.

[0079] Step S33, Reference Figures 11 to 13After the root pass is completed, filler weld 204 is performed. One of the first welding gun 300 and the second welding gun 400 is used to apply an electric arc and feed wire to weld. After completing one layer of filler weld 204 on one side of the double bevel, the other welding gun is used to apply an electric arc and feed wire to perform filler weld 204 at the corresponding filler weld 204 seam on the other side. After welding is completed, the welding gun is changed again to weld. In this way, the first welding gun 300 and the second welding gun 400 are used to alternately weld on both sides of the double bevel until the bevel position of the double bevel is reached. Among them, after the first layer of root pass 201, the second layer of root pass 202 and the third layer of root pass 203, the weld has a certain depth (generally more than 5mm). The back temperature of the filler weld 204 is low, so there is no need to worry about oxidation. Therefore, there is no need to take inert gas back protection measures. Welding can be carried out on both sides until the entire weld is completed. This can balance the stress on both sides of the weld and avoid deformation on one side of the weld, which would lead to the phenomenon of the final part having excessive contour.

[0080] Step S4: After welding the two vacuum chamber segments 200, the welding device 100 for the two vacuum chamber segments is connected by the connecting beam 600 and the splicing plate 700 to weld the splicing position of the two vacuum chamber segments 200. The welding method for the splicing position of the two vacuum chamber segments 200 is the same as the welding method for the support column 220 and the curved shell 210.

[0081] According to the welding method of the vacuum chamber segment 200 of the present invention, by sequentially performing a first-layer root pass weld 201, a second-layer root pass weld 202, a third-layer root pass weld 203, and multiple filler welds 204 on the support column 220 and the curved shell 210, the connection strength between the support column 220 and the curved shell 210 can be guaranteed, the welding efficiency can be improved, the stress on both sides of the double-sided bevel can be balanced, deformation of the support column 220 and the curved shell 210 can be avoided, the contour accuracy of the support column 220 can be improved, and the reliability of the vacuum chamber segment 200 can be further improved.

[0082] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A segmented welding apparatus for a vacuum chamber, characterized in that, include: Side panels, wherein there are two side panels and they are spaced apart in a first direction; The partition is a plurality of partitions disposed between two side plates. The plurality of partitions are spaced apart in a second direction, which is perpendicular to the first direction. The top surface of the partition and the top surface of the side plate are both arc-shaped and coplanar. The top surfaces of the plurality of partitions and the top surfaces of the two side plates together form an arc-shaped support surface. Each partition is provided with multiple limiting plates, which are spaced apart along the arc length direction on the top surface of the partition, and each limiting plate is provided with a support column positioning groove. A limiting component is provided at one end of each side plate away from the partition plate, and the limiting component is used to limit the two ends of the arc-shaped support surface in the first direction.

2. The vacuum chamber segmented welding apparatus according to claim 1, characterized in that, The limiting plate includes a first plate and a second plate that are vertically connected. The first plate is connected to the partition, and the second plate is located on the side of the first plate near the arc-shaped support surface and is provided with the support column positioning groove.

3. The vacuum chamber segmented welding apparatus according to claim 2, characterized in that, The first plate has a plurality of first holes, and the partition has a plurality of second holes. The plurality of second holes and the plurality of first holes are arranged in a one-to-one correspondence. Each second hole and the corresponding first hole is provided with a first bolt. The first bolt is used to lock the first plate to the partition.

4. The vacuum chamber segmented welding apparatus according to claim 3, characterized in that, Multiple sets of first holes and multiple sets of second holes are provided in the vertical direction, and each set of first holes and second holes has at least two in the first direction, wherein the vertical direction is perpendicular to the first direction and the second direction.

5. The vacuum chamber segmented welding apparatus according to claim 1, characterized in that, The side plate has multiple third holes at both ends in the second direction. The multiple third holes are arranged in at least two groups along the arc length of the top surface of the side plate. Each group of third holes has at least two holes in the vertical direction, which is perpendicular to the first direction and the second direction.

6. The vacuum chamber segmented welding apparatus according to claim 1, characterized in that, The limiting component includes multiple limiting units, which are spaced apart in the second direction of the side plate.

7. The vacuum chamber segmented welding apparatus according to claim 6, characterized in that, The limiting unit includes a positioning plate and a wedge block. The positioning plate includes a first part and a second part that are perpendicularly connected to each other. The first part is connected to the side plate, and the second part is located on the side of the arc-shaped support surface away from the partition. The wedge block is in close contact with the side of the second part near the arc-shaped support surface.

8. The vacuum chamber segmented welding apparatus according to claim 7, characterized in that, The second part has a positioning surface on the side near the arc-shaped support surface. In the direction of the partition towards the side plate, the distance between the positioning surface and the top surface of the side plate gradually decreases, and in the second direction, the thickness of the wedge block gradually decreases.

9. The vacuum chamber segmented welding apparatus according to claim 8, characterized in that, The first part has a clearance groove near the positioning surface.

10. A method for welding segments of a vacuum chamber, characterized in that, The vacuum chamber segment is welded using the welding apparatus for vacuum chamber segmentation as described in any one of claims 1 to 9, wherein the vacuum chamber segment includes a curved shell and support columns, the curved shell is provided with a plurality of through holes, and there are a plurality of support columns, each of the plurality of support columns and the plurality of through holes corresponding one-to-one, with each support column installed in a corresponding through hole; the welding method includes: Double-sided bevels are machined at the welding positions of the curved shell and the support column; The curved shell is placed on the arc-shaped support surface, and the edge of the curved shell is aligned with the edge of the arc-shaped support surface. The two ends of the curved shell in the first direction are limited by the limiting component. Then, multiple support columns are passed through the corresponding through holes from top to bottom and supported in the corresponding support column positioning grooves. Welding the support column and the curved shell together includes: A first welding torch is set on the upper side of the double-sided bevel to apply an electric arc and feed wire for welding, and a second welding torch is set on the lower side of the double-sided bevel to apply an electric arc and supply inert shielding gas to complete the first layer of root pass welding. Apply an electric arc to both the first welding gun and the second welding gun and feed wire to weld, and complete the second layer of root pass welding and the third layer of root pass welding in sequence; After the root pass is completed, filler welding is performed. One of the first welding guns and the second welding gun is used to apply an arc and feed wire to weld. After one layer of filler welding is completed on one side of the double bevel, the other welding gun is used to apply an arc and feed wire to perform filler welding at the corresponding filler weld position on the other side. After welding is completed, the welding gun is changed again to weld. This process is repeated on both sides of the double bevel by alternating welding with the first welding gun and the second welding gun until the bevel position of the double bevel is reached. After the welding of the two vacuum chamber segments is completed, the welding devices for the two vacuum chamber segments are connected by connecting beams and splicing plates to weld the splicing positions of the two vacuum chamber segments.

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