A divertor cassette and method of processing thereof

Abstract

The application relates to the technical field of fusion reaction devices, and discloses a divertor box body and a processing method thereof. The divertor box body comprises a main body and a cover plate. The main body has a first side for being connected with a plasma-facing structure. A cooling groove extending along the length direction of the main body is arranged in the main body, and the opening of the cooling groove is located on the outer wall of the non-first side of the main body. The cover plate is connected with the outer wall of the non-first side of the main body, covers the opening of the cooling groove, and forms a cooling channel together with the cooling groove. By arranging the opening of the cooling groove on the outer wall of the non-first side of the main body, the machining process of the first side is reduced, and error accumulation is avoided. When the cover plate is connected with the main body, the connection position of the main body and the cover plate is located in the area outside the first side. The stress generated during the connection of the main body and the cover plate and after the connection is controlled in the area outside the first side, so that the precision of the connection of the divertor box body and the plasma-facing structure meets the requirements.

Description

Technical Field

[0001] This invention relates to the field of fusion reaction device technology, and in particular to a divertor housing and its processing method. Background Technology

[0002] The divertor, as a core component of a tokamak fusion device, mainly consists of a plasma-facing component, a housing, and cooling conduits. The plasma-facing component includes an inner target plate, a dome, and an outer target plate. The housing's main functions are as follows: connecting and supporting the plasma-facing component; supplying and discharging coolant to the various components of the divertor; providing the teleoperational structural features for the plasma-facing component and facilitating teleoperation; and reducing the impact of neutrons on the vacuum chamber and magnet downstream of the divertor. Therefore, the importance of the housing in the divertor structure is self-evident. The divertor housing is characterized by its large size and numerous curved surfaces. Due to the relative positional relationship between the plasma configuration and the surface of the plasma-facing component of the divertor, specific requirements are placed on the profile of the plasma-facing component surface in engineering to ensure that the assembled divertor surface profile meets operational requirements. Achieving the required divertor surface profile places high demands on the machining accuracy of the divertor housing surface, especially the positional accuracy of the interface between the plasma-facing component, the divertor support, and the housing. These requirements are difficult to meet in large-volume divertor structures, and further research is needed to find a suitable method for processing the divertor housing.

[0003] In related technologies, the structural design of divertor housings often lacks consideration for the manufacturing process, making it difficult for the final manufactured housing to meet the required precision. For example, Chinese Patent CN114038580A discloses a novel main body and its assembly method for a divertor suitable for magnetic confinement devices. The novel main body includes a longitudinal beam assembly and a positioning assembly located at the end of the longitudinal beam assembly; each longitudinal beam has several through holes for installing a connecting pipe below the longitudinal beam. Designing the housing as two parallel longitudinal beams results in excessive length, and the longitudinal beams have multiple curved surfaces and through holes. During manufacturing, controlling the rigidity of the longitudinal beams is difficult, and the welding and stress release between the longitudinal beams and other components are complex. These factors make it difficult to predict manufacturing errors, resulting in the final assembled divertor's surface profile failing to meet requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing divertor housing design has shortcomings, and the error after the processing of the divertor housing is large, which makes it difficult for the surface profile of the divertor after final assembly to meet the requirements.

[0005] To address the aforementioned technical problems, the present invention provides a divertor housing, comprising: The main body has a first side for connection to a plasma-facing structure, and a cooling groove extending along its length is provided inside the main body, the opening of which is located on the outer wall of the main body on a side other than the first side. A cover plate is connected to the outer wall of the main body on the non-first side. The cover plate covers the opening of the cooling tank, and the cover plate and the cooling tank together form a cooling channel.

[0006] According to one embodiment of the present invention, the cover plate includes at least two sub-plates, wherein the at least two sub-plates are arranged adjacent to each other, and the two adjacent sub-plates are welded together.

[0007] According to one embodiment of the present invention, a first welding surface is formed on one side where the sub-plate is welded to another sub-plate. The first welding surface includes a first inclined surface and a second inclined surface distributed along the thickness direction of the sub-plate. The first inclined surface and the second inclined surface are inclined to each other, and the connection between the first inclined surface and the second inclined surface protrudes outward toward the sub-plate.

[0008] According to one embodiment of the present invention, the angle between the first inclined surface and the thickness direction of the sub-plate is A1, where 30°≤A1≤35°; The angle between the second inclined plane and the thickness direction of the sub-plate is A2, where 30°≤A2≤35°.

[0009] According to one embodiment of the present invention, the cover plate is welded to the main body, and a weld with a U-shaped cross-sectional profile is formed at the weld. The cover plate is provided with a second welding surface, and the main body is provided with a third welding surface. The second welding surface and the third welding surface constitute the side wall surface of the weld. The angle between the side wall surface of the weld and its central axis is A3, and 15°≤A3≤20°.

[0010] According to one embodiment of the present invention, the main body is an integrally molded part, and the main body further includes a second side, a third side and a fourth side, the second side being opposite to the first side, the third side and the fourth side being located between the first side and the second side, and both being connected to the first side and the second side, the opening of the cooling groove being located on the third side, and / or the opening of the cooling groove being located on the fourth side.

[0011] According to one embodiment of the present invention, the main body includes an inner section, a middle section and an outer section connected in sequence along its length direction. The inner section, the middle section and the outer section enclose a mounting groove. The inner wall of the mounting groove is on the first side. The inner section, the middle section and the outer section are welded together in sequence.

[0012] According to one embodiment of the present invention, a mounting structure is provided on the first side, the mounting structure being used for connection with a plasma-facing structure. The mounting structure is located on the inner section, and the connection between the inner section and the middle section is located away from the mounting structure. Alternatively, the mounting structure is disposed on the outer section, and the connection position between the outer section and the middle section is disposed away from the mounting structure; Alternatively, the mounting structure may be located on the middle section, with the connection points between the inner section and the middle section, and between the outer section and the middle section, both located away from the mounting structure.

[0013] The present invention also provides a processing method based on the divertor housing described above, comprising the following steps: The main body is formed by integral forging, and the machining allowance on one side of the outer surface of the main body is between 5mm and 10mm. The main body is machined to form the cooling tank; The cover plate and the main body are welded together; The first side of the main body is finished.

[0014] The present invention also provides a processing method based on the divertor housing described above, comprising the following steps: The inner, middle, and outer sections of the main body are forged and formed respectively. Groove-shaped structures are respectively machined into the inner section, the middle section, and the outer section; The inner section, the middle section, and the outer section are welded together in sequence to form the main body, and the groove-shaped structures on the inner section, the middle section, and the outer section are assembled to form the cooling groove. The cover plate and the main body are welded together; The first side of the main body is finished.

[0015] The divertor housing of this invention reduces the processing steps on the first side and avoids error accumulation by placing the opening of the cooling groove on the outer wall of the main body (excluding the first side). Furthermore, when the cover plate is connected to the main body, the connection point is located outside the first side, controlling the stress generated during and after the connection process outside the first side. This improves the accuracy of the divertor housing and ensures that the accuracy of the connection between the divertor housing and the plasma-facing structure meets the requirements. Attached Figure Description

[0016] Figure 1 This is a perspective view of the divertor housing provided in an embodiment of the present invention.

[0017] Figure 2This is one of the exploded views of the divertor housing provided in the embodiments of the present invention, wherein the connecting pipe is not shown.

[0018] Figure 3 This is the second exploded view of the divertor housing provided in the embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the main body provided in an embodiment of the present invention.

[0020] Figure 5 This is an exploded view of the main body provided in an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the weld structure between sub-plates provided in an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the weld structure between the main body and the cover plate provided in an embodiment of the present invention.

[0023] Figure 8 This is one of the flowcharts illustrating the processing method of the divertor housing provided in this embodiment of the invention.

[0024] Figure 9 This is the second schematic flowchart of the processing method for the divertor housing provided in this embodiment of the invention.

[0025] Figure label: 110. Main body; 111. First side; 1111. Mounting structure; 112. Cooling tank; 113. Second side; 114. Third side; 115. Third welding surface; 116. Inner section; 117. Middle section; 1171. Connecting section; 1172. First parallel section; 1173. Second parallel section; 118. Outer section; 1181. First section; 1182. Second section; 1183. Third section; 119. Mounting slot; 120. Cover plate; 121. Sub-plate; 122. First welding surface; 1221. First inclined surface; 1222. Second inclined surface; 1223. Bending angle; 123. Second welding surface; 130. Connecting pipe. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] In the description of the embodiments of the present invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present 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 the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] like Figure 1 and Figure 2 As shown, a method for processing a divertor housing according to an embodiment of the present invention includes a main body 110 and a cover plate 120.

[0031] Specifically, the main body 110 has a first side 111 for connection to a plasma-facing structure. A connecting structure may be provided on the first side 111 for connection to the plasma-facing structure. The plasma-facing structure can be an existing target plate. The connecting structure adopts an existing structure based on the target plate structure, which will not be elaborated here. A cooling groove 112 extending along the length of the main body 110 is provided within it. The opening of the cooling groove 112 is located on the outer wall of the main body 110 other than the first side 111; that is, the opening of the cooling groove 112 can be located on the outer wall of the main body 110 other than the first side 111. For example, the main body 110 is approximately hexahedral in shape. The main body 110 also includes a second side 113 opposite to the first side 111, and a third side 114 and a fourth side connecting the first side 111 and the second side 113. The third side 114 is opposite to the fourth side. Figure 2 As shown, the opening of the cooling tank 112 can be located on the second side 113, the third side 114, and / or the fourth side. The first side 111, the second side 113, the third side 114, and the fourth side all extend along the length of the main body 110. The opening of the cooling tank 112 can extend from one end of the cooling tank 112 to the other end, or the cooling tank 112 can have multiple openings spaced apart along its length. The cover plate 120 is connected to the outer wall of the main body 110 on the non-first side 111. The cover plate 120 covers the opening of the cooling tank 112, and the cover plate 120 and the cooling tank 112 enclose a cooling channel for the circulation of refrigerant to remove heat from the main body 110. The first side 111 is used to connect to the plasma-facing structure. By locating the opening of the cooling tank 112 on the outer wall of the main body 110 on the non-first side 111, the processing steps of the first side 111 can be reduced during the processing of the main body 110, thereby reducing the processing error of the first side 111. Furthermore, when connecting the cover plate 120 to the main body 110, the connection position between the main body 110 and the cover plate 120 is located in the area outside the first side 111. The stress generated during and after the connection of the main body 110 and the cover plate 120 is controlled in the area outside the first side 111 to ensure that the accuracy of the main body 110 after connection with the plasma-facing structure meets the requirements.

[0032] According to the divertor housing of the present invention, by setting the opening of the cooling groove 112 on the outer wall of the main body 110 (excluding the first side 111), the processing steps for connecting the first side 111 to the plasma-facing structure are reduced, thus avoiding error accumulation. Furthermore, when the cover plate 120 is connected to the main body 110, the connection position between the main body 110 and the cover plate 120 is located outside the first side 111. This controls the stress generated during and after the connection between the main body 110 and the cover plate 120 to be outside the first side 111, ensuring that the accuracy of the divertor housing after connection to the plasma-facing structure meets the requirements.

[0033] like Figure 1 and Figure 3As shown, in some embodiments, the divertor housing further includes a connecting pipe 130, which is welded to the main body 110, and the internal channel of the connecting pipe 130 communicates with the cooling channel. The connecting pipe 130 is used to connect to the external structure of the divertor housing to deliver refrigerant between the cooling channel and the external structure.

[0034] like Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the cover plate 120 includes at least two sub-plates 121, wherein the at least two sub-plates 121 are arranged adjacent to each other and are welded together. Specifically, the cooling tank 112 may have multiple openings spaced apart along its length, each opening having a corresponding sub-plate 121, and the adjacent sub-plates 121 may be welded together by argon arc welding.

[0035] like Figure 6 As shown, according to some embodiments of the present invention, a first welding surface 122 is formed on the side where sub-plate 121 is welded to another sub-plate 121. The first welding surface 122 includes a section along the thickness direction of sub-plate 121 (e.g., ...). Figure 6 The first inclined surface 1221 and the second inclined surface 1222 are distributed in the direction indicated by the middle arrow a. The first inclined surface 1221 and the second inclined surface 1222 are inclined to each other, and the connection between the first inclined surface 1221 and the second inclined surface 1222 protrudes outward toward the sub-plate 121, forming a bending angle 1223. When two adjacent sub-plates 121 are spliced, the first welding surfaces 122 on the two sub-plates 121 form a symmetrical hourglass-shaped weld. In this way, on the one hand, the heat generated during the welding process can be evenly applied to both sides of the weld, avoiding local overheating of the sub-plate 121 during welding; on the other hand, after welding, when the welding position of the two sub-plates 121 cools and shrinks, the shrinkage forces on both sides of the weld are opposite in direction and similar in magnitude, which can effectively balance and cancel each other, thereby significantly reducing the overall angular deformation, bending deformation and residual stress, further suppressing the deformation trend after welding, and ensuring the processing accuracy of the divertor housing. In some embodiments, the angle between the first inclined surface 1221 and the thickness direction of the sub-plate 121 is A1, 30°≤A1≤35°, and the angle between the second inclined surface 1222 and the thickness direction of the sub-plate 121 is A2, 30°≤A2≤35°. It is understood that the thickness of the cover plate 120 is typically relatively small. By setting the weld between the sub-plates 121 of the cover plate 120 to a symmetrical hourglass shape, the sub-plates 121 on both sides of the weld are heated evenly, reducing the deformation and residual internal stress after welding, and improving the strength of the weld position between the sub-plates 121, thus improving welding stability. Of course, in some embodiments, the weld between the thinner part of the main body 110 and the sub-plate 121 can also adopt the symmetrical hourglass shape described above.

[0036] According to some embodiments of the present invention, the cover plate 120 is welded to the main body 110, and a U-shaped weld is formed at the weld joint. The cover plate 120 has a second welding surface 123, and the main body 110 has a third welding surface 115. The second welding surface 123 and the third welding surface 115 constitute the sidewall of the U-shaped weld. The U-shaped weld has a smooth inner wall transition to reduce welding stress. The bottom wall of the weld can be an arc surface, and the angle between the sidewall of the weld and the central axis of the weld is A3, where 15°≤A3≤20°. Specifically, as shown... Figure 7 As shown, the second welding surface 123 and the third welding surface 115 are respectively provided with inclined surfaces on the side near the weld opening. The inclined surfaces form an angle A3 with the central axis of the weld, where 15°≤A3≤20°. This reduces the deformation after welding and facilitates the rise and escape of gas and slag generated during welding towards the weld opening, thereby significantly reducing defects such as porosity and slag inclusions inside the weld. Of course, in some embodiments, the weld between sub-plates 121 can also adopt the above-mentioned U-shaped weld, which can be selected according to the thickness of the weld and the purpose of reducing the deformation after welding.

[0037] According to some embodiments of the present invention, the main body 110 is an integrally molded part. The main body 110 further includes a second side 113, a third side 114, and a fourth side. The second side 113 is opposite to the first side 111. The third side 114 and the fourth side are both located between the first side 111 and the second side 113, and are both connected to the first side 111 and the second side 113. The opening of the cooling groove 112 is located on the third side 114. In some embodiments, the opening of the cooling groove 112 may also be located on the fourth side. By providing the cooling groove 112 on the third side 114 and the fourth side, when the cooling groove 112 is machined on the main body 110, the pressure on the main body 110 in the direction perpendicular to the first side 111 is reduced, and the deformation of the first side 111 is reduced.

[0038] like Figure 4 As shown, according to some embodiments of the present invention, the main body 110 includes an inner section 116, a middle section 117, and an outer section 118 connected sequentially along its length. After the divertor is installed in the tokamak vacuum chamber, the outer section 118 of the divertor housing is closer to the outer wall of the vacuum chamber than the inner section 116. The inner section 116, the middle section 117, and the outer section 118 enclose a mounting groove 119, the inner wall of which forms a first side 111. The inner section 116, the middle section 117, and the outer section 118 are sequentially welded together, and the mounting groove 119 is approximately U-shaped. By dividing the main body 110 into multiple sections, the inner section 116, the middle section 117, and the outer section 118 can be processed separately during manufacturing, reducing processing difficulty, minimizing unpredictable processing errors, and ensuring the surface finishing accuracy of the main body 110.

[0039] According to some embodiments of the present invention, a mounting structure 1111 is provided on the first side 111 for connection with a plasma-facing structure. The mounting structure 1111 is located on the inner section 116, and the connection position between the inner section 116 and the middle section 117 is set away from the mounting structure 1111. When designing the segmentation position of the inner section 116 and the middle section 117, the position away from the mounting structure 1111 is selected as the segmentation position of the inner section 116 and the middle section 117 to reduce the influence of welding heat on the mounting structure 1111 and ensure the strength of the mounting structure 1111. For example, on the first side 111, the shortest straight-line distance between the connection position of the inner section 116 and the middle section 117 and the mounting structure 1111 on the inner section 116 is L1, where 350mm≤L1≤1500mm. In some embodiments, the mounting structure 1111 is disposed on the outer segment 118, and the connection position between the outer segment 118 and the middle segment 117 is disposed away from the mounting structure 1111. When designing the segmentation position of the outer segment 118 and the middle segment 117, the position away from the mounting structure 1111 is selected as the segmentation position of the outer segment 118 and the middle segment 117 to reduce the influence of welding heat on the mounting structure 1111 and ensure the strength of the mounting structure 1111. For example, on the first side 111, the shortest straight distance between the connection position of the outer segment 118 and the middle segment 117 and the mounting structure 1111 on the outer segment 118 is L2, 350mm≤L1≤1500mm. In some embodiments, the mounting structure 1111 is disposed on the intermediate section 117. The connection positions between the inner section 116 and the intermediate section 117, and between the outer section 118 and the intermediate section 117, are both located away from the mounting structure 1111. That is, when designing the segmentation positions of the outer section 118, the intermediate section 117, and the inner section 116, positions away from the mounting structure 1111 are selected as the segmentation positions of the outer section 118 and the intermediate section 117, and the inner section 116 and the intermediate section 117. For example, on the first side 111, the shortest straight-line distance between the connection position of the outer section 118 and the intermediate section 117 and the mounting structure 1111 on the intermediate section 117 is L2, where 350mm ≤ L1 ≤ 1500mm. Furthermore, there may be at least three mounting structures 1111, wherein at least one mounting structure 1111 is located on the inner section 116, at least one mounting structure 1111 is located on the middle section 117, and at least one mounting structure 1111 is located on the outer section 118. When selecting the positions of the outer section 118, the middle section 117, and the inner section 116, the selection of the segment positions can be referred to the above selection, which will not be repeated here.

[0040] like Figure 4 and Figure 5As shown, to further reduce the processing difficulty of the main body 110 and minimize unpredictable processing errors, the intermediate section 117 and the outer section 118 can be manufactured in segments. Specifically, the intermediate section 117 includes a connecting segment, a first parallel segment, and a second parallel segment. One end of the connecting segment is connected to the inner section 116, and the other end is connected to the first parallel segment and the second parallel segment, respectively. The first parallel segment and the second parallel segment are distributed along a direction perpendicular to the width of the intermediate section 117, and both the first parallel segment and the second parallel segment are connected to the outer section 118. The outer section 118 includes a first segment, a second segment, and a third segment distributed along its own length and connected sequentially. The first segment is connected to the first parallel segment and the second parallel segment, respectively, and the third segment is connected to the connecting pipe 130.

[0041] like Figure 8 As shown, the method for processing a divertor housing according to the present invention is used to process the divertor housing as described above. The method for processing the divertor housing includes the following steps: S1: The main body 110 is formed by integral forging, with a machining allowance of 5mm to 10mm on one side of the outer surface of the main body 110. The outer contour of the main body 110 is formed by forging, and a machining allowance of 5mm to 10mm is retained on the outer surface of the main body 110.

[0042] S2: The main body 110 is machined to form the cooling groove 112. The cooling groove 112 is machined on the integrally forged main body 110 using a five-axis CNC machine tool, and the inner surface of the cooling groove 112 is precision machined through the opening of the cooling groove 112.

[0043] S3: Welding the cover plate 120 and the main body 110 together. The cover plate 120 is machined to fit the shape of the opening of the cooling tank 112 through a fitting process. When the opening of the cooling tank 112 is segmented, a corresponding sub-plate 121 is fitted to each segment. The cover plate 120 is fixed in the required installation position by spot welding, and then the cover plate 120 and the main body 110 are welded together by argon arc welding. During the welding process, the dimensions of the divertor housing are measured while welding. If the measured dimension exceeds the error range, the position of the cover plate 120 is finely adjusted before welding. Further, before the step of welding the cover plate 120 and the main body 110 together, the following steps are also included: machining a through hole on the peripheral wall of the cooling tank 112, inserting the connecting pipe 130 through the through hole, and welding the main body 110 and the connecting pipe 130 together from the inside of the cooling tank 112.

[0044] S4: Finish machining the first side 111 of the main body 110. After the cover plate 120 is welded to the main body 110, finish machining the first side 111 of the main body 110 so that the surface profile of the first side 111 is less than or equal to 0.75mm, so that the machining accuracy of the position where the main body 110 is connected to the plasma structure meets the requirements.

[0045] Compared to the existing technology that forms the divertor housing by welding all the plates together, the main body 110 of the divertor housing in this application is formed by forging. The main body 110 and the cover plate 120 are welded together to form the divertor housing. By combining forging and welding of forgings and plates together, processing errors are effectively controlled and the amount of welding deformation during the processing of the divertor housing is reduced.

[0046] like Figure 9 As shown, the method for processing a divertor housing according to the present invention is used to process the divertor housing as described above. The method for processing the divertor housing includes the following steps: S1': Forge the inner section 116, middle section 117 and outer section 118 of the main body 110 respectively. Forge the inner section 116, middle section 117 and outer section 118 respectively, and retain a machining allowance of 5mm to 10mm on the outer surface of the inner section 116, middle section 117 and outer section 118.

[0047] S2': Groove structures are machined into the inner section 116, the middle section 117, and the outer section 118 respectively. A five-axis CNC machine tool is used to perform precision machining on the inner section 116, the middle section 117, and the outer section 118 to form groove structures in the inner section 116, the middle section 117, and the outer section 118.

[0048] S3': The inner section 116, middle section 117, and outer section 118 are sequentially welded together to form the main body 110, and the groove-shaped structures on the inner section 116, middle section 117, and outer section 118 are assembled to form a cooling groove 112. Using welding fixtures, the inner section 116, middle section 117, and outer section 118 are sequentially welded using argon arc welding, and the groove-shaped structures on the inner section 116, middle section 117, and outer section 118 are assembled to form the cooling groove 112. During the welding process, the dimensions of the main body 110 are measured while welding. If the measured dimension is found to be larger than the error range, the two sections being welded are finely adjusted before welding continues. After welding is completed, the welded areas are surface-finished.

[0049] S4': Welding the cover plate 120 and the main body 110 together. The cover plate 120 is machined to fit the shape of the opening of the cooling tank 112 through a fitting process. When the opening of the cooling tank 112 is segmented, a corresponding sub-plate 121 is fitted to each segment. The cover plate 120 is fixed in the required installation position by spot welding, and then the cover plate 120 and the main body 110 are welded together by argon arc welding. During the welding process, the dimensions of the divertor housing are measured while welding. If the measured dimension exceeds the error range, the position of the cover plate 120 is finely adjusted before welding. Further, before the step of welding the cover plate 120 and the main body 110 together, the following steps are also included: machining a through hole on the peripheral wall of the cooling tank 112, inserting the connecting pipe 130 through the through hole, and welding the main body 110 and the connecting pipe 130 together from the inside of the cooling tank 112.

[0050] S5': Finish machining the first side 111 of the main body 110. After the cover plate 120 is welded to the main body 110, finish machining the first side 111 of the main body 110 so that the surface profile of the first side 111 is less than or equal to 0.75mm, so that the machining accuracy of the position where the main body 110 is connected to the plasma structure meets the requirements.

[0051] Compared to the existing technology that uses full plate welding to form the divertor housing, the main body 110 of the divertor housing in this application is formed by segmented forging. The inner section 116, the middle section 117, and the outer section 118 of the forging are sequentially welded together to form the main body 110. The main body 110 is then welded to the cover plate 120 to form the divertor housing. By using segmented forging and welding of forgings and plates, processing errors are effectively controlled, and the amount of welding deformation during the processing of the divertor housing is reduced.

[0052] In summary, this invention provides a divertor housing and its processing method. By placing the opening of the cooling groove 112 on the outer wall of the main body 110 (excluding the first side 111), the processing steps for connecting the first side 111 to the plasma-facing structure are reduced, avoiding error accumulation. Furthermore, when the cover plate 120 is connected to the main body 110, the connection point is located outside the first side 111, controlling the stress generated during and after the connection to the cover plate 120 outside the first side 111, ensuring the accuracy of the connection between the main body 110 and the plasma-facing structure meets requirements. Moreover, by processing the divertor housing through forging and welding of the forging and plate parts, processing errors are effectively controlled, reducing welding deformation during the divertor housing processing.

[0053] Finally, it should be noted that the above embodiments are only for illustrating the present invention and are not intended to limit the present invention. It should be pointed out that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A divertor housing, characterized in that, include: The main body (110) has a first side (111) for connection with a plasma-facing structure, and a cooling groove (112) extending along its length is provided inside the main body (110), the opening of the cooling groove (112) being located on the outer wall of the non-first side (111) of the main body (110); A cover plate (120) is connected to the outer wall of the non-first side (111) of the main body (110). The cover plate (120) covers the opening of the cooling tank (112). The cover plate (120) and the cooling tank (112) enclose each other to form a cooling channel.

2. The divertor housing according to claim 1, characterized in that, The cover plate (120) includes at least two sub-plates (121), wherein at least two sub-plates (121) are arranged adjacent to each other, and the two adjacent sub-plates (121) are welded together.

3. The divertor housing according to claim 2, characterized in that, The side where the sub-plate (121) is welded to another sub-plate (121) forms a first welding surface (122). The first welding surface (122) includes a first inclined surface (1221) and a second inclined surface (1222) distributed along the thickness direction of the sub-plate (121). The first inclined surface (1221) and the second inclined surface (1222) are inclined to each other, and the connection between the first inclined surface (1221) and the second inclined surface (1222) protrudes outward toward the sub-plate (121).

4. The divertor housing according to claim 3, characterized in that, The angle between the first inclined surface (1221) and the thickness direction of the sub-plate (121) is A1, where 30°≤A1≤35°; The angle between the second inclined plane (1222) and the thickness direction of the sub-plate (121) is A2, 30°≤A2≤35°.

5. The divertor housing according to claim 1, characterized in that, The cover plate (120) is welded to the main body (110) and a weld with a U-shaped cross-sectional profile is formed at the weld. The cover plate (120) is provided with a second welding surface (123) and the main body (110) is provided with a third welding surface (115). The second welding surface (123) and the third welding surface (115) constitute the side wall of the weld. The angle between the side wall of the weld and its central axis is A3, 15°≤A3≤20°.

6. The divertor housing according to claim 1, characterized in that, The main body (110) is an integrally molded part. The main body (110) also includes a second side (113), a third side (114) and a fourth side. The second side (113) is opposite to the first side (111). The third side (114) and the fourth side are both located between the first side (111) and the second side (113) and are both connected to the first side (111) and the second side (113). The opening of the cooling groove (112) is located on the third side (114), and / or the opening of the cooling groove (112) is located on the fourth side.

7. The divertor housing according to claim 1, characterized in that, The main body (110) includes an inner section (116), a middle section (117) and an outer section (118) connected in sequence along its length. The inner section (116), the middle section (117) and the outer section (118) enclose to form a mounting groove (119). The inner wall of the mounting groove (119) is on the first side (111). The inner section (116), the middle section (117) and the outer section (118) are welded together in sequence.

8. The divertor housing according to claim 7, characterized in that, A mounting structure (1111) is provided on the first side (111), the mounting structure (1111) being used for connection with the plasma-facing structure. The mounting structure (1111) is located on the inner section (116), and the connection position between the inner section (116) and the middle section (117) is set away from the mounting structure (1111); Alternatively, the mounting structure (1111) may be disposed on the outer section (118), and the connection position between the outer section (118) and the middle section (117) may be disposed away from the mounting structure (1111); Alternatively, the mounting structure (1111) is located on the middle section (117), and the connection positions of the inner section (116) and the middle section (117) and the outer section (118) and the middle section (117) are both located away from the mounting structure (1111).

9. A method for processing a divertor housing according to any one of claims 1 to 6, characterized in that, Includes the following steps: The main body is formed by integral forging, and the machining allowance on one side of the outer surface of the main body is between 5mm and 10mm. The main body is machined to form the cooling tank; The cover plate and the main body are welded together; The first side of the main body is finished.

10. A method for processing a divertor housing according to any one of claims 1 to 8, characterized in that, Includes the following steps: The inner, middle, and outer sections of the main body are forged and formed respectively. Groove-shaped structures are respectively machined into the inner section, the middle section, and the outer section; The inner section, the middle section, and the outer section are welded together in sequence to form the main body, and the groove-shaped structures on the inner section, the middle section, and the outer section are assembled to form the cooling groove. The cover plate and the main body are welded together; The first side of the main body is finished.

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