Flanging structure of cold shield sector of nuclear fusion device, cold shield device and nuclear fusion device

Abstract

The invention relates to the technical field of fusion devices, and discloses a flange structure of a cold shield sector of a nuclear fusion device, the cold shield device and the nuclear fusion device, and the flange structure of the cold shield sector of the nuclear fusion device comprises a first panel; the second panel and the first panel are arranged at an interval; the flanging assembly is arranged between the first panel and the second panel and comprises a first flanging and a second flanging, the first flanging is connected with the first panel, the second flanging comprises a main body part and a flat plate part which are connected, the main body part is connected with the second panel, and the flat plate part is arranged at the ends, away from the second panel, of the main body part and the first flanging; the surface, opposite to the second panel, of the flat plate part is a polished surface; the connecting piece is connected with the first flange and the second flange in a fastening manner; and the first insulating part is arranged between the first flange and the second flange in an insulating manner. According to the flange structure of the cold shield sector of the nuclear fusion device, the heat shielding effect can be improved, and the heat radiation influence on low-temperature components is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fusion devices, and more particularly to a flanging structure of a cold shield sector of a nuclear fusion device, a cold shield device and a nuclear fusion device. Background Art

[0002] As an important component in a Tokamak nuclear fusion device, the main function of the cold shield is to isolate the thermal radiation of high-temperature components from affecting the low-temperature system (such as superconducting magnets), so that the low-temperature components can operate normally in their corresponding low-temperature environments. If the thermal shielding effect of the cold shield is not good, it may cause the low-temperature components to malfunction. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a flanging structure of a cold shield sector of a nuclear fusion device, a cold shield device and a nuclear fusion device. The flanging structure of the cold shield sector of the nuclear fusion device can improve the thermal shielding effect of the cold shield device, enhance the thermal shielding performance, and thus reduce the thermal radiation impact on the low-temperature components in the nuclear fusion device.

[0004] The present invention also aims to provide a cold shield device to apply the above-mentioned flanging structure of the cold shield sector of the nuclear fusion device.

[0005] The present invention further aims to provide a nuclear fusion device to apply the above-mentioned cold shield device.

[0006] The flanging structure of the cold shield sector of the nuclear fusion device according to an embodiment of the present invention includes: a first panel; a second panel spaced from the first panel; a flanging assembly disposed between the first panel and the second panel and including a first flange and a second flange. The first flange is connected to the first panel, and the second flange includes a connected main body portion and a flat portion. The main body portion is connected to the second panel, and the flat portion is disposed between the main body portion and the end of the first flange away from the second panel. The plane of the flat portion facing away from the second panel is configured as a polished surface; a connecting member for tightly connecting the first flange and the second flange; wherein, taking a reference plane coplanar with the first panel and the second panel, the projections of the connecting member, the first flange and the main body portion on the reference plane are located within the projection of the flat portion on the reference plane; a first insulating member insulatingly disposed between the first flange and the second flange.

[0007] According to the flanging structure of the cold shield sector of the nuclear fusion device according to the embodiments of the present invention, by setting the second flanging to include a main body portion and a flat plate portion, the flat plate portion can cover the first flanging, the main body portion and the connecting member, and since the plane of the flat plate portion facing away from the second panel is a polished surface, the surface emissivity of the area where the flanging assembly is located can be reduced, the thermal shielding ability of the cold shield assembly can be improved, the thermal shielding effect can be enhanced, and the thermal radiation of the cold shield assembly to the cryogenic components can be reduced.

[0008] In some embodiments of the present invention, the thickness of the flat plate portion is less than the thickness of the main body portion and less than the thicknesses of the first panel and the second panel.

[0009] In some embodiments of the present invention, the thickness of the flat plate portion is T, where 1 mm ≤ T ≤ 3 mm.

[0010] In some embodiments of the present invention, one end of the connecting member in the axial direction is a first end face, and the other end is a second end face. In the axial direction, the length by which one end of the flat plate portion extends beyond the first end face is L1, and the length by which the other end of the flat plate portion extends beyond the second end face is L2, where 2 mm ≤ L1 ≤ 3 mm and 2 mm ≤ L2 ≤ 3 mm.

[0011] In some embodiments of the present invention, in the axial direction of the connecting member, the length by which the flat plate portion extends beyond the first flanging is D1, the length by which the flat plate portion extends beyond the main body portion is D2, and the distance between the flat plate portion and the first panel is H, where D1 ≥ H and D2 ≥ H.

[0012] In some embodiments of the present invention, the first flanging includes a first base segment and a first extension segment connected at an angle, and the first extension segment and the first panel have equal thicknesses and are connected; the main body portion includes a second base segment and a second extension segment connected at an angle, and the second extension segment and the second panel have equal thicknesses and are connected; the connecting member connects the first base segment and the second base segment.

[0013] In some embodiments of the present invention, in the axial direction of the connecting member, the length of the first extension segment is L3, where 10 mm ≤ L3 ≤ 15 mm; the length of the second extension segment is L4, where 10 mm ≤ L4 ≤ 15 mm.

[0014] In some embodiments of the present invention, the flanging structure of the cold shield sector of the nuclear fusion device includes a second insulating member, and the second insulating member is insulatingly provided between the connecting member and the first flanging and the second flanging.

[0015] According to the embodiments of the present invention, there is also provided a cold shield device including the flanging structure of the cold shield sector of the nuclear fusion device according to any one of the foregoing.

[0016] According to the cold shield device of the embodiment of the present invention, since the flat plate portion of the second flange in the flanging structure of the cold shield sector of the nuclear fusion device can cover the first flange, the connecting member and the main body portion, the thermal radiation of the first flange, the connecting member and the main body portion to the low-temperature component can be reduced, and the overall thermal shielding ability of the cold shield device can be improved.

[0017] A nuclear fusion device provided according to an embodiment of the present invention further includes the cold shield device of any one of the foregoing.

[0018] According to the nuclear fusion device of the embodiment of the present invention, since the cold shield device has a strong thermal shielding ability, the stability of the low-temperature environment of the low-temperature components in the nuclear fusion device can be maintained, and the operation stability of the nuclear fusion device can be improved.

[0019] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic three-dimensional structure diagram of the flanging structure of the cold shield sector of the nuclear fusion device provided by some embodiments of the present invention; Figure 2 is a top view of the flanging structure of the cold shield sector of the nuclear fusion device provided by some embodiments of the present invention; Figure 3 is a schematic internal structure diagram of the flanging structure of the cold shield sector of the nuclear fusion device provided by some embodiments of the present invention; Figure 4 is a top view of the flanging structure of the cold shield sector of the nuclear fusion device provided by some other embodiments of the present invention; Figure 5 is a top view of the flanging structure of the cold shield sector of the nuclear fusion device provided by some other embodiments of the present invention; Figure 6 is a schematic internal structure diagram of the flanging structure of the cold shield sector of the nuclear fusion device provided by some other embodiments of the present invention.

[0021] REFERENCE SIGNS: 100, flanging structure of the cold shield sector of the nuclear fusion device; 10, first panel; 20, second panel; 30, flanging assembly; 31, first flange; 311, first base segment; 312, first extension segment; 31a, first mounting hole; 32. Second flanging; 321. Main body part; 321a. Second mounting hole; 3211. Second base section; 3212. Second extension section; 322. Flat plate part; 322a. Plane 40. Connector; 40a. First end face; 40b. Second end face 50. First insulating part; 50a. Third mounting hole 60. Second insulating part; 601. Split part; 601a. Gap; 6011. First part; 6012. Second part; 6021. Cylindrical part; 6022. Skirt part Specific embodiments

[0022] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0024] In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or weight.

[0025] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounting", "connecting", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The flanging structure 100 of the cold screen sector of the nuclear fusion device according to the embodiment of the present invention can be applied to the cold screen device of the nuclear fusion device, and the cold screen device can include a plurality of cold screen sectors. The cold screen sector can include a plurality of flanging structures 100 of the cold screen sector of the nuclear fusion device.

[0027] Reference is made below Figures 1 - 5 , to describe the flanging structure 100 of the cold screen sector of the nuclear fusion device according to the embodiment of the present invention.

[0028] As Figures 1 to 2 shown, the flanging structure 100 of the cold screen sector of the nuclear fusion device according to the embodiment of the present invention includes: a first panel 10, a second panel 20, a flanging assembly 30, a connecting member 40, and a first insulating member 50. The second panel 20 and the first panel 10 are arranged at intervals; the flanging assembly 30 is arranged between the first panel 10 and the second panel 20, and includes a first flanging 31 and a second flanging 32. The first flanging 31 is connected to the first panel 10. The second flanging 32 includes a connected main body portion 321 and a flat plate portion 322. The main body portion 321 is connected to the second panel 20. The flat plate portion 322 is arranged between the main body portion 321 and the end of the first flanging 31 away from the second panel 20. The plane 322a of the flat plate portion 322 facing away from the second panel 20 is configured as a polished surface; the connecting member 40 tightly connects the first flanging 31 and the second flanging 32; wherein, taking the reference plane coplanar with the first panel 10 and the second panel 20, the projections of the connecting member 40, the first flanging 31, and the main body portion 321 on the reference plane are located within the projection of the flat plate portion 322 on the reference plane; the first insulating member 50 is insulatingly arranged between the first flanging 31 and the second flanging 32.

[0029] The first panel 10 and the second panel 20 can refer to the cold screen panels constituting the cold screen sector, and the shapes of the first panel 10 and the second panel 20 can be, but are not limited to, flat panels, arc panels, or multi-curvature panels, etc.

[0030] The flanging assembly 30 can refer to the structure connecting the first panel 10 and the second panel 20. The first flanging 31 is connected to the first panel 10. The main body portion 321 of the second flanging 32 is connected to the second panel 20, and the plane 322a of the flat plate portion 322 facing away from the second panel 20 is configured as a polished surface. The polished surface can refer to a surface with a roughness less than or equal to 0.15. The roughness of the polished surface can be the same as the roughness of the surfaces of the first panel 10 and the second panel 20 facing the low-temperature components, or can be higher than the roughness requirements of the surfaces of the first panel 10 and the second panel 20 facing the low-temperature components.

[0031] The connection methods between the first flanging 31 and the first panel 10, and between the main body portion 321 and the second panel 20 can be, but are not limited to, welding, bonding, or nested snap connection, etc.

[0032] The connecting member 40 can refer to a structure for fixedly connecting the first flange 31 and the second flange 32, which can be but is not limited to bolts, rivets, etc. For example, referring to Figure 1 and Figure 2 , the connecting member 40 can be a bolt. When connecting the first flange 31 and the second flange 32, sufficient pre-tightening force can be provided by tightening the bolt, so that the first flange 31 and the second flange 32 are closely attached, ensuring the reliability of the connection, and further ensuring that the flange structure 100 of the cold shield sector of the nuclear fusion device has sufficient structural strength.

[0033] In the statement "taking a reference plane coplanar with the first panel 10 and the second panel 20, the projections of the connecting member 40, the first flange 31, and the main body portion 321 on the reference plane are located within the projection of the flat plate portion 322 on the reference plane", the reference plane refers to a plane coplanar with the first panel 10 and the second panel 20, and can be but is not limited to a flat straight plane, an arc surface, a multi-curvature surface, etc. For example, if the first panel 10 and the second panel 20 are arc surfaces, correspondingly, the reference plane is a large arc surface coplanar with the first panel 10 and the second panel 20. The projections of the connecting member 40, the first flange 31, and the main body portion 321 on the reference plane are located within the projection of the flat plate portion 322 on the reference plane, that is to say, the area of the flat plate portion 322 is larger and can cover the connecting member 40, the first flange 31, and the main body portion 321.

[0034] The first insulating member 50 can refer to a component that plays an insulating role between the first flange 31 and the second flange 32, and can simultaneously insulate and separate the main body portion 321 and the flat plate portion 322 from the first flange 31. The first insulating member 50 can be made of but is not limited to fiberglass resin, ceramics, polytetrafluoroethylene, etc. For example, the first insulating member 50 can be made of fiberglass resin material, which has excellent electrical insulation performance. Through the first insulating member 50, the current conduction between the first flange 31 and the second flange 32 can be effectively blocked, preventing the generation of a large secondary magnetic field and secondary current between the first panel 10 and the second panel 20 under the action of the magnetic field of the superconducting magnet, and ensuring the stability of the cold shield sector.

[0035] Among them, to adapt to the structures of the first flange 31 and the second flange 32, the first insulating member 50 can be in an L shape, so as to play an insulating role between the first flange 31 and the main body portion 321, and between the first flange 31 and the flat plate portion 322.

[0036] In a nuclear fusion device, compared with low-temperature components, the cold shield device is at a high temperature. When heat radiation emits from the cold shield device to the low-temperature components, it is necessary to reduce the heat radiation of the cold shield device to the low-temperature components. Therefore, it is necessary to reduce the temperature and surface emissivity of the cold shield device, and the surface emissivity decreases as the surface roughness decreases. When the cold shield sector forms the cold shield device, among adjacent cold shield panels, the first flange 31 faces the low-temperature components (such as superconducting magnets) relative to the first panel 10, and the second flange 32 faces the low-temperature components relative to the second panel 20. Since the surfaces of the first panel 10 and the second panel 20 are relatively smooth, and the connecting member 40, as a common connecting structural member, has a large surface roughness and a large surface emissivity. The first flange 31 and the main body 321 usually also have a large surface roughness and a large surface emissivity. Secondly, since the first flange 31, the second flange 32 and the connecting member 40 are located at the edge of the flange structure 100 of the cold shield sector of the nuclear fusion device and are far from the cooling pipeline on the surface of the flange structure 100 of the cold shield sector of the nuclear fusion device, the temperatures of the first flange 31, the second flange 32 and the connecting member 40 are relatively high. Therefore, the connecting member 40, the first flange 31 and the main body 321 have a large heat radiation to the low-temperature components, which will affect the low-temperature environment of the low-temperature components.

[0037] In the flange structure 100 of the cold shield sector of the nuclear fusion device according to the embodiment of the present invention, since a reference plane coplanar with the first panel 10 and the second panel 20 is used, the projections of the connecting member 40, the first flange 31 and the main body 321 on the reference plane are located within the projection of the flat plate portion 322 on the reference plane. With the above structure, the flat plate portion 322 can block the connecting member 40, the first flange 31 and the main body 321 together from the low-temperature components, and block the influence of the surface emissivities of the connecting member 40, the first flange 31 and the main body 321 on the low-temperature components. Moreover, since the plane 322a of the flat plate portion 322 facing the low-temperature components is a polished surface, the plane 322a of the flat plate portion 322 has a low surface emissivity, and the heat radiation of the flange structure 100 of the cold shield sector of the nuclear fusion device to the low-temperature components can be reduced.

[0038] According to the flange structure 100 of the cold shield sector of the nuclear fusion device in the embodiment of the present invention, by setting the second flange 32 to include a structure of a main body portion 321 and a flat plate portion 322, the flat plate portion 322 can cover the first flange 31, the main body portion 321 and the connecting member 40. Moreover, since the plane 322a of the flat plate portion 322 facing away from the second panel 20 is a polished surface, the surface emissivity of the area where the flange assembly 30 is located can be reduced, the heat shielding ability of the flange structure 100 of the cold shield sector of the nuclear fusion device can be improved, the heat shielding effect can be enhanced, and the heat radiation of the flange structure 100 of the cold shield sector of the nuclear fusion device to the low-temperature components can be reduced.

[0039] In some embodiments of the present invention, such as Figures 1 to 5As shown, the thickness of the flat part 322 is less than that of the main body part 321 and less than the thicknesses of the first panel 10 and the second panel 20.

[0040] In the above technical solution, the flat part 322 mainly functions as a cover. By setting the thickness of the flat part 322 to be relatively thin, the amount of material used can be reduced, saving material costs, and moreover, the weight of the second flanging 32 can be reduced, facilitating the installation and fixation of the second flanging 32 and the second panel 20.

[0041] In some embodiments of the present invention, as Figure 2 shown, the thickness of the flat part 322 is T, where 1 mm ≤ T ≤ 3 mm. It can be understood that the thickness of the flat part 322 can be, but is not limited to, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc.

[0042] In the above technical solution, the thickness of the flat part 322 is greater than or equal to 1 mm, having sufficient thickness to endow the flat part 322 with strong strength and stiffness, and not being easily deformed by external forces, which is beneficial to ensuring that the polished surface can remain in a planar state and having a relatively stable and reliable surface emissivity. The thickness of the flat part 322 is less than or equal to 3 mm, and the amount of material used for the flat part 322 is less, which can save material costs.

[0043] In some embodiments of the present invention, as Figure 3 shown, one end of the connecting member 40 in the axial direction is the first end face 40a, and the other end is the second end face 40b. In the axial direction, the length by which one end of the flat part 322 extends beyond the first end face 40a is L1, and the length by which the other end of the flat part 322 extends beyond the second end face 40b is L2, where 2 mm ≤ L1 ≤ 3 mm and 2 mm ≤ L2 ≤ 3 mm.

[0044] "The axial direction of the connecting member 40" can refer to Figure 3 the left - right direction. L1 can be, but is not limited to, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc. L2 can be, but is not limited to, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, etc.

[0045] In the above technical solution, lengths of L1 and L2 greater than or equal to 2 mm can ensure a sufficient shielding range, avoiding the situation where the connecting member 40 cannot be completely covered due to factors such as installation errors, and can also reduce to a certain extent the thermal radiation effect of the connecting member 40 on the low-temperature component laterally. L1 and L2 less than or equal to 3 mm will not cause unreasonable structure due to excessive length, thus maintaining the stable operation of the low-temperature component and improving the thermal shielding performance of the flanging structure 100 of the cold shield sector of the nuclear fusion device.

[0046] In some embodiments of the present invention, as Figure 4 shown, in the axial direction of the connecting member 40, the overhanging length of the flat plate portion 322 relative to the first flanging 31 is D1, the overhanging length of the flat plate portion 322 relative to the main body portion 321 is D2, and the distance between the flat plate portion 322 and the first panel 10 is H, where D1≥H and D2≥H.

[0047] The connecting member 40 usually has a large surface roughness. Not only will the emissivity of the surface facing the low-temperature component (such as a superconducting magnet) cause a thermal radiation effect on the low-temperature component, but also the sides (left and right ends) of the connecting member 40 will cause a thermal radiation effect on the low-temperature component. In the above technical solution, the relatively large overhanging lengths D1 and D2 enable the flat plate portion 322 to have a larger covering area, thereby being able to better block the lateral thermal radiation effect of the connecting member 40 on the low-temperature component, further reducing the influence of the connecting member 40 on the low-temperature component, so that the flanging structure 100 of the cold shield sector of the nuclear fusion device can provide a more stable low-temperature environment for the low-temperature component and improve the thermal shielding performance of the flanging structure 100 of the cold shield sector of the nuclear fusion device.

[0048] In some embodiments of the present invention, as Figure 5 shown, the first flanging 31 includes a first base segment 311 and a first extension segment 312 connected at an angle, and the first extension segment 312 and the first panel 10 have equal thickness and are connected; the main body portion 321 includes a second base segment 3211 and a second extension segment 3212 connected at an angle, and the second extension segment 3212 and the second panel 20 have equal thickness and are connected; the connecting member 40 connects the first base segment 311 and the second base segment 3211.

[0049] The first base segment 311 and the first extension segment 312 can be arranged at an angle. For example, the first base segment 311 and the first extension segment 312 are perpendicular to each other. Similarly, the second base segment 3211 and the second extension segment 3212 can also be arranged at an angle. For example, the second base segment 3211 and the second extension segment 3212 are perpendicular to each other. Among them, the connection methods between the first extension segment 312 and the first panel 10, and between the second extension segment 3212 and the second panel 20 can be, but are not limited to, welding, bonding, socketing, etc. Optionally, the first base segment 311 and the first extension segment 312 are integrally formed, and the second base segment 3211 and the second extension segment 3212 are integrally formed.

[0050] In the above technical solution, since the thicknesses of the first extension segment 312 and the first panel 10 are equal, the first extension segment 312 and the first panel 10 are convenient for mating connection, and the first panel 10 is also far from the first base segment 311, which can also provide a large space between the first extension segment 312 and the first panel 10 for connection operations. Similarly, for the thicknesses of the second extension segment 3212 and the second panel 20, the second extension segment 3212 and the second panel 20 are convenient for mating connection, and the second panel 20 is also far from the second base segment 3211, which can also provide a large space between the second extension segment 3212 and the second panel 20 for connection operations.

[0051] Optionally, the first extension segment 312 and the first panel 10 are connected by welding, and the second extension segment 3212 and the second panel 20 are connected by welding. In this embodiment, the first extension segment 312 and the second extension segment 3212 extend out to facilitate the arrangement of the welding torch, thereby facilitating welding and reducing the difficulty of welding operations. Since the thicknesses of the first extension segment 312 and the first panel 10 are equal, and the thicknesses of the second extension segment 3212 and the second panel 20 are equal, the probability of stress concentration caused by thickness differences during welding can be reduced, which is beneficial to improving the welding quality, ensuring the connection strength and sealing performance of the flanging structure 100 of the cold shield sector of the nuclear fusion device, improving the reliability of the flanging structure 100 of the cold shield sector of the nuclear fusion device, and extending the service life.

[0052] In some embodiments of the present invention, as Figure 5 shown, in the axial direction of the connecting member 40, the length of the first extension segment 312 is L3, where 10 mm ≤ L3 ≤ 15 mm; the length of the second extension segment 3212 is L4, where 10 mm ≤ L4 ≤ 15 mm.

[0053] Exemplarily, L3 can be, but is not limited to, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc., and L4 can be, but is not limited to, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc.

[0054] In the above technical solution, by setting L3 and L4 within the above range, the first extension segment 312 can have an appropriate length relative to the first base segment 311. On the one hand, it facilitates the connection between the first extension segment 312 and the first panel 10. On the other hand, it can prevent waste of materials caused by a relatively large length of the first extension segment 312, and can also avoid increasing the size of the flat part 322 to cover the first flange 31, which is beneficial to reducing the size of the flat part 322 and lowering the manufacturing cost. Similarly, the second extension segment 3212 also has an appropriate length relative to the second base segment 3211, which facilitates the connection between the second extension segment 3212 and the second panel 20, can also prevent waste of materials caused by a relatively large length of the second extension segment 3212, and can also avoid increasing the size of the flat part 322 to cover the first flange 31, which is beneficial to reducing the size of the flat part 322 and lowering the manufacturing cost.

[0055] Optionally, as Figure 4 shown, the first flange 31 can also be perpendicularly connected to the first panel 10, and the main body part 321 is perpendicularly connected to the second panel 20.

[0056] Optionally, as Figure 2 and Figure 4 shown, the thickness of the first flange 31 is greater than the thickness of the first panel 10, and the first flange 31 is welded to the first panel 10; the thickness of the main body part 321 is greater than the thickness of the second panel 20, and the main body part 321 is welded to the second panel 20. The first flange 31 and the main body part 321 have a relatively large thickness, and thus have relatively strong mechanical strength, which can enable the first panel 10 and the second panel 20 to be stably connected together after splicing.

[0057] In some embodiments of the present invention, as Figures 1 to 3 and Figure 5 shown, the flange structure 100 of the cold shield sector of the nuclear fusion device includes a second insulating member 60, and the second insulating member 60 is insulatingly provided between the connecting member 40 and the first flange 31 and the second flange 32.

[0058] The second insulating member 60 can refer to a component that can play an insulating role between the connecting member 40 and the first flange 31 and the second flange 32. The second insulating member 60 can be, but is not limited to, fiberglass resin materials, ceramic insulating gaskets, polytetrafluoroethylene insulating members, and the like. For example, the second insulating member 60 can be a fiberglass resin material, which has excellent electrical insulation performance and can effectively block the current conduction between the connecting member 40 and the first flange 31 and the second flange 32, ensuring the stability of the flange structure 100 of the cold shield sector of the nuclear fusion device.

[0059] In the above technical solution, since the flanging structure 100 of the cold shield sector of the nuclear fusion device is applied to the nuclear fusion device, and the low-temperature component faced by the flanging structure 100 of the cold shield sector of the nuclear fusion device is usually a superconducting magnet. A current will be formed during the operation of the superconducting magnet. By insulating the connecting member 40 from the first flanging 31 and the second flanging 32 through the second insulating member 60, it can effectively prevent the current from conducting between the connecting member 40 and the first flanging 31 and the second flanging 32, prevent a conductive path from being formed between the first panel 10 and the second panel 20, and prevent a large secondary magnetic field and secondary current from being formed on the first panel 10 and the second panel 20 when the superconducting magnet operates. Adopting the above solution can ensure the electrical insulation performance of the flanging structure 100 of the cold shield sector of the nuclear fusion device and improve the reliability of the flanging structure 100 of the cold shield sector of the nuclear fusion device.

[0060] In some embodiments of the present invention, the thickness of the second insulating member 60 can be 1 mm to 2 mm. That is to say, the thickness of the second insulating member 60 can be, but is not limited to, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, and so on. By setting the second insulating member 60 within the above thickness range, it is possible to reduce the material usage while ensuring good insulation performance and reduce costs.

[0061] In some embodiments of the present invention, as Figure 3 shown, the first flanging 31 is provided with a first mounting hole 31a, the main body portion 321 is provided with a second mounting hole 321a, the second mounting hole 321a and the first mounting hole 31a are correspondingly arranged, the first insulating member 50 is provided with a third mounting hole 50a, and the connecting member 40 passes through the first mounting hole 31a, the second mounting hole 321a, and the third mounting hole 50a; the second insulating member 60 includes two split parts 601, and one of the two split parts 601 is hermetically arranged between the connecting member 40, the first flanging 31, and the first insulating member 50, and the other is hermetically arranged between the connecting member 40, the main body portion 321, and the first insulating member 50.

[0062] In the above technical solution, the two split parts 601 can be respectively sleeved inside the first mounting hole 31a and the second mounting hole 321a and outside the connecting member 40. In this way, when assembling the second insulating member 60, one split part 601 is inserted from the left side of the first flanging 31, and the other split part 601 is inserted from the right side of the main body portion 321. Compared with using a single second insulating member 60 with a relatively large length, adopting this method can reduce the installation complexity of the second insulating member 60 and improve the assembly efficiency.

[0063] In some embodiments of the present invention, as Figure 3As shown, a gap 601a is formed between the two split parts 601, and the gap 601a is located within the third mounting hole 50a. In this way, when the connecting member 40 connects the first flanging 31 and the second flanging 32, the two split parts 601 are squeezed to elastically deform and gradually come into contact, which can prevent the two split parts 601 from being squeezed against each other and causing damage, and can reduce the risk of insulation failure.

[0064] In some embodiments of the present invention, as Figure 3 shown, the split part 601 includes a connected first part 6011 and a second part 6012. The first part 6011 is cylindrical and sleeved on the connecting member 40, and the second part 6012 is an annular plate member and is disposed in contact with the corresponding first flanging 31 or the main body part 321. In this way, the coverage area of the split part 601 can be increased, which is beneficial to enhancing the insulation effect between the split part 601 and the first flanging 31, or enhancing the insulation effect between the split part 601 and the main body part 321.

[0065] Exemplarily, as Figure 3 shown, when the connecting member 40 is a bolt, the first part 6011 can play an insulating role between the bolt column and the first flanging 31 or the main body part 321, and the second part 6012 can play an insulating role between the bolt head and the main body part 321, or the second part 6012 can play an insulating role between the nut and the first flanging 31.

[0066] For another example, when the connecting member 40 is a rivet, the first part 6011 can play an insulating role between the cylindrical part of the rivet and the first flanging 31 or the main body part 321, and the second part 6012 can play an insulating role between the head of the rivet and the first flanging 31 or the main body part 321.

[0067] In some embodiments of the present invention, as Figure 6 shown, the second insulating member 60 may include a cylindrical part 6021 and a skirt part 6022. The cylindrical part 6021 is disposed in the third mounting hole 50a, and the skirt part 6022 is disposed at one end of the cylindrical part 6021 and is arranged around the cylindrical part 6021. The skirt part 6022 is in mutual contact with one of the main body part 321 and the first flanging 31, and the end of the cylindrical part 6021 away from the skirt part 6022 is flush with the other of the main body part 321 and the first flanging 31.

[0068] It can be understood that in the above technical solution, when the connecting member 40 is a bolt, since the second insulating member 60 has only one skirt portion 6022, at least one of the nut or the bolt head in the bolt can merely fit against the first flanging 31 or the main body portion 321 and achieve rigid support, so as to improve the fastening effect of the connecting member 40 on the first flanging 31 and the second flanging 32 and enhance the connection reliability of the first flanging 31 and the second flanging 32.

[0069] In some embodiments of the present invention, the thickness of the first insulating member 50 may be 1 mm to 2 mm. That is to say, the thickness of the first insulating member 50 may be, but is not limited to, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, etc. By setting the first insulating member 50 within the above thickness range, it is possible to reduce the material usage while ensuring good insulating performance and lower the cost.

[0070] In some embodiments of the present invention, the second flanging 32 is a separately manufactured part, and the main body portion 321 and the flat plate portion 322 are welded together. Adopting this method can reduce the manufacturing difficulty of the second flanging 32 and lower the cost.

[0071] In some embodiments of the present invention, the main body portion 321 and the flat plate portion 322 are integrally formed parts. Adopting this forming method can improve the overall consistency of the second flanging 32, reduce the splicing weak points, and can improve the overall strength and stiffness.

[0072] As Figure 6 shown, a cold shield device according to an embodiment of the present invention includes the flanging structure 100 of the cold shield sector of the nuclear fusion device in any of the foregoing embodiments.

[0073] In the cold shield device according to the embodiment of the present invention, since the flat plate portion 322 of the second flanging 32 in the flanging structure 100 of the cold shield sector of the nuclear fusion device can cover the first flanging 31, the connecting member 40 and the main body portion 321, it can thereby reduce the thermal radiation of the first flanging 31, the connecting member 40 and the main body portion 321 to the low-temperature components and improve the overall thermal shielding ability of the cold shield device.

[0074] A nuclear fusion device according to an embodiment of the present invention includes the cold shield device in any of the foregoing embodiments.

[0075] In the nuclear fusion device according to the embodiment of the present invention, since the cold shield device has a strong thermal shielding ability, it can further maintain the stability of the low-temperature environment of the low-temperature components in the nuclear fusion device and improve the operation stability of the nuclear fusion device.

[0076] It should be noted that the other constitutions and operations of the cold shield device and the nuclear fusion device in the embodiments of the present invention are known to those skilled in the art and will not be elaborated here.

[0077] The following will describe a specific embodiment of the flanging structure 100 of the cold shield sector of the nuclear fusion device of the present invention in conjunction with Figures 1 to 3 ...

[0078] The flanging structure 100 of the cold shield sector of the nuclear fusion device includes: a first panel 10, a second panel 20, a flanging assembly 30, a connecting member 40, a first insulating member 50, and a second insulating member 60.

[0079] The second panel 20 and the first panel 10 are arranged at intervals.

[0080] The flanging assembly 30 is arranged between the first panel 10 and the second panel 20, and includes a first flanging 31 and a second flanging 32. The first flanging 31 is connected to the first panel 10. The second flanging 32 includes a connected main body portion 321 and a flat plate portion 322. The main body portion 321 is connected to the second panel 20. The flat plate portion 322 is arranged between the main body portion 321 and one end of the first flanging 31 away from the second panel 20. The plane 322a of the flat plate portion 322 facing away from the second panel 20 is configured as a polished surface. The thickness of the flat plate portion 322 is less than the thickness of the main body portion 321, and less than the thicknesses of the first panel 10 and the second panel 20.

[0081] The connecting member 40 tightly connects the first flanging 31 and the second flanging 32. One end of the connecting member 40 in the axial direction is a first end face 40a, and the other end is a second end face 40b. In the axial direction, one end of the flat plate portion 322 extends beyond the first end face 40a, and the other end of the flat plate portion 322 extends beyond the second end face 40b.

[0082] The first insulating member 50 is made of a glass fiber resin material and is insulatingly arranged between the first flanging 31 and the second flanging 32.

[0083] The second insulating member 60 is made of a glass fiber resin material and is insulatingly arranged between the connecting member 40 and the first flanging 31 and the second flanging 32.

[0084] In the description of this specification, the description with reference to terms such as "some embodiments", "optionally", "further", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0085] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flanging structure for a cold shield sector of a nuclear fusion device, characterized in that, Comprising: A first panel; A second panel, which is spaced apart from the first panel; A flanging component, which is arranged between the first panel and the second panel and includes a first flange and a second flange. The first flange is connected to the first panel. The second flange includes a connected main body portion and a flat plate portion. The main body portion is connected to the second panel. The flat plate portion is arranged between the main body portion and the end of the first flange away from the second panel. The plane of the flat plate portion facing away from the second panel is configured as a polished surface; A connecting piece, which tightly connects the first flange and the second flange; wherein, taking a reference plane coplanar with the first panel and the second panel, the projections of the connecting piece, the first flange and the main body portion on the reference plane are located within the projection of the flat plate portion on the reference plane; A first insulating member, which is insulatively arranged between the first flange and the second flange.

2. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 1, wherein The thickness of the flat plate portion is less than the thickness of the main body portion and less than the thicknesses of the first panel and the second panel.

3. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 2, wherein The thickness of the flat plate portion is T, where 1mm ≤ T ≤ 3mm.

4. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 1, characterized in that, One end of the connecting piece in the axial direction is a first end face, and the other end is a second end face. In the axial direction, the length by which one end of the flat plate portion exceeds the first end face is L1, and the length by which the other end of the flat plate portion exceeds the second end face is L2, where 2mm ≤ L1 ≤ 3mm and 2mm ≤ L2 ≤ 3mm.

5. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 1, wherein In the axial direction of the connecting piece, the exceeding length of the flat plate portion relative to the first flange is D1, the exceeding length of the flat plate portion relative to the main body portion is D2, and the distance between the flat plate portion and the first panel is H, where D1 ≥ H and D2 ≥ H.

6. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 1, characterized in that, The first flange includes a first base segment and a first extension segment connected at an angle. The first extension segment has the same thickness as and is connected to the first panel; the main body portion includes a second base segment and a second extension segment connected at an angle. The second extension segment has the same thickness as and is connected to the second panel; the connecting piece connects the first base segment and the second base segment.

7. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 6, characterized in that, In the axial direction of the connecting piece, the length of the first extension segment is L3, where 10mm ≤ L3 ≤ 15mm; the length of the second extension segment is L4, where 10mm ≤ L4 ≤ 15mm.

8. The flanging structure of the cold shield sector of the nuclear fusion device according to claim 1, characterized in that, The flanging structure of the cold shield sector of the nuclear fusion device includes a second insulating member, which is insulatively arranged between the connecting piece and the first flange and the second flange.

9. A cold screen device, characterized in that, Comprising the flanging structure of the cold shield sector of the nuclear fusion device according to any one of claims 1 to 8.

10. A nuclear fusion device, characterized in that, Comprising the cold shield device according to claim 9.

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