Cooling double-flow channel structure of nuclear fusion cold shield device, cold shield device and nuclear fusion device

Abstract

The present invention relates to the technical field of fusion devices and discloses a dual-channel cooling structure for a nuclear fusion cold shield device, a cold shield device, and a nuclear fusion device. The dual-channel cooling structure includes: a cold plate having a first channel and a second channel disposed therein, the first channel and the second channel being bent, the cold plate having a first inlet, a first outlet, a second inlet, and a second outlet, the first inlet and the first outlet being connected to the first channel, and the second inlet and the second outlet being connected to the second channel; a first cold pipe assembly, the first cold pipe assembly including a first pipe section and a second pipe section, the first pipe section being connected to the first inlet, and the second pipe section being connected to the first outlet; and a second cold pipe assembly, the second cold pipe assembly including a third pipe section and a fourth pipe section, the third pipe section being connected to the second inlet, and the fourth pipe section being connected to the second outlet. The present invention can be arranged in a narrow area of ​​a cold shield device to improve the overall thermal shielding reliability and thermal shielding performance of the cold shield device.

Description

Technical Field

[0001] The present invention relates to the technical field of fusion devices, and in particular to a cooling double-flow channel structure of a nuclear fusion cold shield device, a cold shield device and a nuclear fusion device. Background Art

[0002] The superconducting magnets in fusion reactors require an extremely low temperature environment, necessitating a cold shield to shield the magnets from the effects of thermal radiation. The cold shield structure primarily consists of a cold shield panel and cooling piping. Due to its position relative to other components in the fusion reactor, the cold shield must be positioned to avoid interference, resulting in a complex design in some areas. To ensure the reliability of the cold shield, two main and auxiliary cooling pipes are required. However, due to the limitations of cooling pipe size and the distance between the main and auxiliary pipes required for welding, conventional piping methods are difficult to implement in confined areas. Consequently, high temperatures are encountered in some areas of the cold shield, reducing its performance. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a dual-channel cooling structure for a nuclear fusion cold shield device, which can improve the overall thermal shielding reliability and thermal shielding performance of the cold shield device.

[0004] The present invention also aims to propose a cold shield device to apply the cooling double-flow channel structure of the above-mentioned nuclear fusion cold shield device.

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

[0006] According to an embodiment of the present invention, a dual-channel cooling structure of a nuclear fusion cold shield device includes: a cold plate, a first channel and a second channel are provided in the cold plate, the first channel and the second channel are bent, the cold plate is provided with a first inlet, a first outlet, a second inlet and a second outlet, the first inlet and the first outlet are connected to the first channel, and the second inlet and the second outlet are connected to the second channel; a first cold pipe assembly, the first cold pipe assembly includes a first pipe segment and a second pipe segment, the first pipe segment is connected to the first inlet, and the second pipe segment is connected to the first outlet; a second cold pipe assembly, the second cold pipe assembly includes a third pipe segment and a fourth pipe segment, the third pipe segment is connected to the second inlet, and the fourth pipe segment is connected to the second outlet.

[0007] According to the cooling dual-channel structure of the nuclear fusion cold shield device according to the embodiment of the present invention, the cooling dual-channel structure of the nuclear fusion cold shield device has a smaller installation and layout space, and can be arranged in a narrow area of ​​the cold shield device, thereby improving the layout flexibility of the cooling system, and can also reduce the number of bending times of the cooling pipe, reduce the risk of damage and leakage of the cooling pipe, and improve the system stability and reliability of the cooling system. Moreover, the cold plate has a larger cooling surface, which can improve the cooling efficiency of the narrow area, thereby improving the overall thermal shielding reliability and thermal shielding performance of the cold shield device.

[0008] In some embodiments of the present invention, the first flow channel extends along the outer edge contour of the cold plate, the second flow channel is arranged on the inner side of the cold plate relative to the first flow channel, and the first flow channel and the second flow channel are bent at one end in the longitudinal direction of the cold plate.

[0009] In some embodiments of the present invention, the first flow channel includes a first section, a second section and a first arc section, the first section and the second section are set at an angle and are located on the same side of the first arc section, and the first section is connected to the second section through the first arc section; the second flow channel is arranged in an area enclosed by the first section, the second section and the first arc section, the second flow channel includes a third section, a fourth section and a second arc section, the third section and the fourth section are set at an angle and are located on the same side of the second arc section, and the third section is connected to the fourth section through the second arc section.

[0010] In some embodiments of the present invention, the cold plate includes two symmetrically arranged and welded plates, each of the plates is provided with a first flow groove and a second flow groove, the first flow grooves of the two plates jointly define the first flow channel, and the second flow grooves of the two plates jointly define the second flow channel.

[0011] In some embodiments of the present invention, a first shell wall is formed between the first section and the adjacent side surface of the cold plate, a second shell wall is formed between the second section and the adjacent side surface of the cold plate, a third shell wall is formed between the first arc segment and the adjacent side surface of the cold plate, a fourth shell wall is formed between the third section and the first section, a fifth shell wall is formed between the fourth section and the second section, a sixth shell wall is formed between the fourth section and the third section, and a seventh shell wall is formed between the second arc segment and the first arc segment; wherein the wall thickness of the first shell wall, the second shell wall, the third shell wall, the fourth shell wall, the fifth shell wall, the sixth shell wall and the seventh shell wall is greater than or equal to 3 mm.

[0012] In some embodiments of the present invention, the first section and the second section are arranged parallel to each other, and the third section and the fourth section are arranged parallel to each other.

[0013] In some embodiments of the present invention, the angle between the first segment and the second segment is greater than 0 degree and less than 90 degrees; the angle between the third segment and the fourth segment is greater than 0 degree and less than 90 degrees.

[0014] According to an embodiment of the present invention, a cold shield device includes: a cold shield body, the cold shield body includes a plurality of cold shield panels, the plurality of cold shield panels are sequentially spliced ​​into a ring along the circumferential direction, and at least one of the cold shield panels is provided with a narrow area; a cooling system, the cooling system includes a cooling dual-channel structure of the nuclear fusion cold shield device as described in any of the above items, and the cooling dual-channel structure of the nuclear fusion cold shield device can be provided at least on the narrow area.

[0015] In some embodiments of the present invention, the cold plate is connected to the narrow area by welding, or the cold plate and the narrow area are integrally formed.

[0016] A nuclear fusion device according to an embodiment of the present invention includes the cold shield device as described above.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 1. A top view of a dual-channel cooling structure of a nuclear fusion cold shield device provided by some embodiments of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of a dual-channel cooling structure of a nuclear fusion cold shield device provided by some embodiments of the present invention;

[0021] Figure 3 is a top view of a cold plate provided in some embodiments of the present invention;

[0022] Figure 4 is a schematic diagram of the internal structure of a cold plate provided in some embodiments of the present invention;

[0023] Figure 5 yes Figure 1 AA section view;

[0024] Figure 6 is a schematic diagram of the three-dimensional structure of a panel provided in some embodiments of the present invention;

[0025] Figure 7This is a schematic diagram of the local structure of the cold shield device and the cold shield panel provided by some embodiments of the present invention. Figure 1 ;

[0026] Figure 8 This is a schematic diagram of the local structure of the cold shield device and the cold shield panel provided by some embodiments of the present invention. Figure 2 .

[0027] Reference numerals:

[0028] 1000. Cold screen device;

[0029] 100. The cooling double-channel structure of the nuclear fusion cold shield device;

[0030] 10. Cold plate;

[0031] 101, first flow channel; 1011, first section; 1012, second section; 1013, first arc section; 102, second flow channel; 1021, third section; 1022, fourth section; 1023, second arc section;

[0032] 10a, first inlet; 10b, first outlet; 10c, second inlet; 10d, second outlet;

[0033] 11. Plate; 11a. First chute; 11b. Second chute;

[0034] 1031, first shell wall; 1032, second shell wall; 1033, third shell wall; 1034, fourth shell wall; 1035, fifth shell wall; 1036, sixth shell wall; 1037, seventh shell wall;

[0035] 20. First cooling pipe assembly;

[0036] 21. First pipe section; 22. Second pipe section;

[0037] 30. Second cooling pipe assembly;

[0038] 31. The third pipe section; 32. The fourth pipe section;

[0039] 110, main cooling pipeline; 120, auxiliary cooling pipeline;

[0040] 210. Cold screen panel; 211. Narrow area; 212. Open area. DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 therefore should not be understood as limiting the present invention.

[0043] In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

[0044] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] like Figure 7 and Figure 8 As shown, the cooling dual-channel structure 100 of the nuclear fusion cold shield device of the embodiment of the present invention can be applied to the cold shield device 1000 of the nuclear fusion device. The cold shield device 1000 includes a cold shield body and a cooling system. The cold shield body includes a plurality of cold shield panels 210. The plurality of cold shield panels 210 are sequentially spliced ​​into a ring along the circumferential direction. At least one cold shield panel 210 is provided with a narrow area 211. The cooling system includes at least one cooling dual-channel structure 100 of the nuclear fusion cold shield device. The cooling dual-channel structure 100 of the nuclear fusion cold shield device can be provided at least on the narrow area 211.

[0047] It is understood that the cooling system described above may further include a primary cooling line 110 and a secondary cooling line 120, with the dual-channel cooling structure 100 of the nuclear fusion cold shield device being arranged in series within the circuit of the primary cooling line 110 and the secondary cooling line 120. Due to the presence of windows and other structures on the cold shield body, the cold shield panel 210 has a relatively wide open area 212 and a relatively narrow area 211. When arranging the cooling system, the primary cooling line 110 and the secondary cooling line 120 are relatively simple to arrange in the open area 212. However, due to space constraints in the narrow area 211, arranging the primary cooling line 110 and the secondary cooling line 120 is more difficult. Therefore, the dual-channel cooling structure 100 of the nuclear fusion cold shield device can be arranged in the narrow area 211 to achieve cooling of the narrow area 211.

[0048] Reference below Figures 1-6 , describing the cooling dual-flow channel structure 100 of the nuclear fusion cold shield device according to an embodiment of the present invention.

[0049] like Figure 1 and Figure 2 As shown, a dual-channel cooling structure 100 for a nuclear fusion cold shield device according to an embodiment of the present invention includes: a cold plate 10, a first cold pipe assembly 20, and a second cold pipe assembly 30. A first channel 101 and a second channel 102 are provided within the cold plate 10. The first channel 101 and the second channel 102 are bent. The cold plate 10 is provided with a first inlet 10a, a first outlet 10b, a second inlet 10c, and a second outlet 10d. The first inlet 10a and the first outlet 10b communicate with the first channel 101, while the second inlet 10c and the second outlet 10d communicate with the second channel 102. The first cold pipe assembly 20 includes a first pipe segment 21 and a second pipe segment 22. The first pipe segment 21 communicates with the first inlet 10a, and the second pipe segment 22 communicates with the first outlet 10b. The second cold pipe assembly 30 includes a third pipe segment 31 and a fourth pipe segment 32. The third pipe segment 31 communicates with the second inlet 10c, and the fourth pipe segment 32 communicates with the second outlet 10d.

[0050] In the above technical solution, the cooling dual-channel structure 100 of the nuclear fusion cold shield device is a dual-channel structure as a whole. The first cold pipe assembly 20 and the first channel 101 form a cooling channel, and the second cold pipe assembly 30 and the second channel 102 form another cooling channel. In this way, there are two main and secondary cooling channels in the cooling dual-channel structure 100 of the nuclear fusion cold shield device. When cooling, one of the two cooling channels can be selected to be opened for cooling, or both can be opened for cooling at the same time.

[0051] In the cooling flow path formed by the first cooling pipe assembly 20 and the first flow channel 101, the first pipe segment 21 can circulate the cooling medium into the first flow channel 101 through the first inlet 10a, and then flow out of the second pipe segment 22 through the first outlet 10b. In the cooling flow path formed by the second cooling pipe assembly 30 and the second flow channel 102, the third pipe segment 31 can circulate the cooling medium into the second flow channel 102 through the second inlet 10c, and then flow out of the fourth pipe segment 32 through the second outlet 10d.

[0052] Compared to conventional cooling pipe arrangements, the dual-channel cooling structure 100 of the nuclear fusion cold shield device of the present invention can be more easily arranged within a narrow area 211. Because the first and second channels 101, 102 of the cold plate 10 are curved, the cooling medium can flow through the narrow area 211 along the curved first and second channels 101, 102 to cool the area. Furthermore, compared to cooling pipes, the cold plate 10 has a larger surface area, creating a larger contact surface with the cold shield panel 210, thereby improving the heat exchange efficiency between the cold plate 10 and the cold shield panel 210.

[0053] Since the diameters of the main cooling pipes 110 and auxiliary cooling pipes 120 of the cooling system in the cold shield device 1000 of the nuclear fusion device are generally small, the dual cooling channel structure 100 of the nuclear fusion cold shield device can cool the cold plate 10 in the narrow area 211. This reduces the number of bends of the main cooling pipes 110 and auxiliary cooling pipes 120 on the cold shield panel 210, reduces the risk of damage to the main cooling pipes 110 and auxiliary cooling pipes 120 due to frequent bends, improves the reliability of the cooling system, and further improves the reliability of the cold shield device 1000. The dual cooling channel structure 100 of the nuclear fusion cold shield device of the embodiment of the present invention can be arranged in the narrow area 211 or in the open area 212. By using the dual cooling channel structure 100 of the nuclear fusion cold shield device, the number of bends of the entire cooling system can be reduced.

[0054] It should be noted that, in the above embodiment, the cooling medium flowing inside the cooling dual-flow channel structure 100 of the nuclear fusion cold shield device may be, but is not limited to, helium, liquid nitrogen, liquid hydrogen, or the like.

[0055] According to the cooling dual-channel structure 100 of the nuclear fusion cold shield device according to the embodiment of the present invention, the cooling dual-channel structure 100 of the nuclear fusion cold shield device has a smaller installation layout space and can be arranged in the narrow area 211 of the cold shield device 1000, thereby improving the layout flexibility of the cooling system, reducing the number of bending times of the cooling pipe, reducing the risk of damage and leakage of the cooling pipe, and improving the system stability and reliability of the cooling system. Moreover, the cold plate 10 has a larger cooling surface, which can improve the cooling efficiency of the narrow area 211, thereby improving the overall thermal shielding reliability and thermal shielding performance of the cold shield device 1000.

[0056] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, the first flow channel 101 extends along the outer edge contour of the cold plate 10 , and the second flow channel 102 is arranged on the inner side of the cold plate 10 relative to the first flow channel 101 . The first flow channel 101 and the second flow channel 102 are bent at one end in the longitudinal direction of the cold plate 10 .

[0057] The “outer edge profile of the cold plate 10 ” may refer to the edge profile of the outer shape of the cold plate 10 . Figure 2 The cold plate 10 may be a straight plate with one end in an arc-shaped plate structure, and the outer edge contour of the cold plate 10 may be U-shaped, and the first flow channel 101 may extend along the outer edge contour of the U-shaped cold plate 10. Figure 4 The cold plate 10 may have a V-shaped plate or a triangular plate structure. The outer edge profile of the cold plate 10 may be V-shaped, and the first flow channel 101 may extend along the V-shaped outer edge profile of the cold plate 10. In other words, the extension path of the first flow channel 101 may vary depending on the shape of the cold plate 10, but all extend along the outer edge profile of the cold plate 10.

[0058] “The second flow channel 102 is provided on the inner side of the cold plate 10 relative to the first flow channel 101 ” can be understood as the second flow channel 102 and the first flow channel 101 being arranged in inner and outer layers inside the cold plate 10 .

[0059] "The first flow channel 101 and the second flow channel 102 are bent at one end in the length direction of the cold plate 10", so that the first flow channel 101 and the second flow channel 102 have a longer extension length inside the cold plate 10, and the first flow channel 101 and the second flow channel 102 can take a longer path, which is more conducive to cooling the slender and narrow area 211.

[0060] In the above technical solution, by setting the first flow channel 101 and the second flow channel 102 inside the cold plate 10 into the above structure, the flow channel lengths of the first flow channel 101 and the second flow channel 102 can be increased, making the overall structure of the cold plate 10 more compact. While ensuring more efficient cooling efficiency, the size of the cold plate 10 can be reduced, making it easier to arrange it in a smaller narrow area 211.

[0061] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, the first flow channel 101 includes a first section 1011, a second section 1012 and a first arc section 1013, the first section 1011 and the second section 1012 are set at an angle and are located on the same side of the first arc section 1013, and the first section 1011 is connected to the second section 1012 through the first arc section 1013; the second flow channel 102 is arranged in an area surrounded by the first section 1011, the second section 1012 and the first arc section 1013, the second flow channel 102 includes a third section 1021, a fourth section 1022 and a second arc section 1023, the third section 1021 and the fourth section 1022 are set at an angle and are located on the same side of the second arc section 1023, and the third section 1021 is connected to the fourth section 1022 through the second arc section 1023.

[0062] It should be noted that the first section 1011, the second section 1012, the third section 1021, and the fourth section 1022 can be straight sections, or roughly straight sections, or sections with a small curvature. The first arc section 1013 and the second arc section 1023 can be arc sections, or sections with a certain curvature, or sections with a partially curved wall. For example, referring to Figure 4 The second arc segment 1023 is a small chamber structure, and the tube wall close to the third segment 1021 and the fourth segment 1022 is an arc wall.

[0063] In the above technical solution, for first flow channel 101, first section 1011 and second section 1012 enable a single inlet and a single outlet for the cooling medium, and first arc section 1013 connects first section 1011 and second section 1012, giving first flow channel 101 an overall U- or V-shape, facilitating the transport of the cooling medium. Similarly, for second flow channel 102, third section 1021 and fourth section 1022 enable a single inlet and a single outlet for the cooling medium, and second arc section 1023 connects third section 1021 and fourth section 1022, giving first flow channel 101 an overall U- or V-shape, facilitating the transport of the cooling medium.

[0064] In some embodiments of the present invention, Figure 2As shown, the end of the first section 1011 away from the first arc section 1013 bends and passes through the cold plate 10 to form a first inlet 10a. The end of the second section 1012 away from the first arc section 1013 bends and passes through the cold plate 10 to form a first outlet 10b. The end of the third section 1021 away from the second arc section 1023 bends and passes through the cold plate 10 to form a second inlet 10b. The end of the fourth section 1022 away from the second arc section 1023 bends and passes through the cold plate 10 to form a second outlet 10d. This structure allows the layout of the first, second, third, and fourth sections 21, 22, 31, and 32 to be adjusted as needed to meet different usage requirements.

[0065] In some embodiments of the present invention, Figure 4 As shown, the first section 1011 linearly extends through one end of the cold plate 10 to form the first inlet 10a, while the second section 1012 linearly extends through the other end of the cold plate 10 to form the first outlet 10b. The third section 1021 linearly extends through one end of the cold plate 10 to form the second inlet 10b, while the fourth section 1022 linearly extends through the other end of the cold plate 10 to form the second outlet 10d. This structure allows the layout of the first, second, third, and fourth sections 21, 22, 31, and 32 to be adjusted as needed to meet different usage requirements.

[0066] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the cold plate 10 includes two symmetrically arranged and welded plates 11, each plate 11 is provided with a first flow groove 11a and a second flow groove 11b, the first flow grooves 11a of the two plates 11 jointly define a first flow channel 101, and the second flow grooves 11b of the two plates 11 jointly define a second flow channel 102.

[0067] It is understood that each plate 11 is machined to form a half-groove structure forming the first flow channel 101 and a half-groove structure forming the second flow channel 102, that is, a first flow channel 11a and a second flow channel groove 11b. The cold plate 10 can be composed of two plates 11 spliced ​​together and welded together, thereby splicing the two first flow channels 11a together to form a complete first flow channel 101, and splicing the two second flow channel grooves 11b together to form a complete second flow channel 102. By configuring the cold plate 10 with the above structure, the difficulty of forming the cold plate 10 can be reduced, thereby reducing manufacturing costs.

[0068] Optionally, the two plates 11 may be connected by diffusion welding.

[0069] In some embodiments of the present invention, Figure 2 and Figure 4As shown, a first shell wall 1031 is formed between the first segment 1011 and the adjacent side surface of the cold plate 10, a second shell wall 1032 is formed between the second segment 1012 and the adjacent side surface of the cold plate 10, a third shell wall 1033 is formed between the first arc segment 1013 and the adjacent side surface of the cold plate 10, a fourth shell wall 1034 is formed between the third segment 1021 and the first segment 1011, and a fourth shell wall 1035 is formed between the fourth segment 1022 and the second segment 1012. A fifth shell wall 1035 is formed, a sixth shell wall 1036 is formed between the fourth section 1022 and the third section 1021, and a seventh shell wall 1037 is formed between the second arc segment 1023 and the first arc segment 1013; wherein the wall thickness of the first shell wall 1031, the second shell wall 1032, the third shell wall 1033, the fourth shell wall 1034, the fifth shell wall 1035, the sixth shell wall 1036 and the seventh shell wall 1037 is greater than or equal to 3 mm.

[0070] The thicknesses of the first shell wall 1031, the second shell wall 1032, the third shell wall 1033, the fourth shell wall 1034, the fifth shell wall 1035, the sixth shell wall 1036, and the seventh shell wall 1037 may be, but are not limited to, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, etc. The thicknesses of the first shell wall 1031, the second shell wall 1032, the third shell wall 1033, the fourth shell wall 1034, the fifth shell wall 1035, the sixth shell wall 1036, and the seventh shell wall 1037 may be equal or unequal.

[0071] It can be understood that since the cold plate 10 adopts the method of welding two plates 11 together after splicing, it is necessary to ensure that the first flow grooves 11a and the second flow grooves 11b of the two plates 11 can be aligned, and the two half grooves can be allowed to have a certain tolerance when aligning. By making the wall thickness of the first shell wall 1031, the second shell wall 1032, the third shell wall 1033, the fourth shell wall 1034, the fifth shell wall 1035, the sixth shell wall 1036 and the seventh shell wall 1037 greater than or equal to 3 mm, the shell walls at corresponding positions of the two plates 11 can have a certain error when aligning, ensuring that the two plates 11 can be welded together after splicing, and also ensuring that the two plates 11 have a suitable size of docking surface, reducing the risk of deformation of the two plates 11 during welding and the inability to achieve alignment welding.

[0072] In some embodiments of the present invention, the thickness of the first shell wall 1031 , the second shell wall 1032 , the third shell wall 1033 , the fourth shell wall 1034 , the fifth shell wall 1035 , the sixth shell wall 1036 and the seventh shell wall 1037 is greater than or equal to 3 mm and less than or equal to 6 mm.

[0073] In the above technical solution, by setting the wall thickness of the first shell wall 1031, the second shell wall 1032, the third shell wall 1033, the fourth shell wall 1034, the fifth shell wall 1035, the sixth shell wall 1036 and the seventh shell wall 1037 to be less than or equal to 6 mm, it is possible to avoid the wall thickness of multiple shell walls being too large, save the material cost of the cold plate 10, and control the overall size of the cold plate 10 within an appropriate range, thereby facilitating the arrangement in the narrow area 211.

[0074] In some embodiments of the present invention, Figure 2 As shown, the first section 1011 and the second section 1012 are arranged parallel to each other, and the third section 1021 and the fourth section 1022 are arranged parallel to each other. In other words, the first flow channel 101 and the second flow channel 102 are generally U-shaped. With this structure of the first flow channel 101 and the second flow channel 102, the cold plate 10 can be a straight plate-like structure with an overall long strip shape, which is convenient for placement in the long and narrow area 211.

[0075] In some embodiments of the present invention, Figure 4 As shown, the angle between the first segment 1011 and the second segment 1012 is greater than 0 degree and less than 90 degrees; the angle between the third segment 1021 and the fourth segment 1022 is greater than 0 degree and less than 90 degrees.

[0076] The angle between the first section 1011 and the second section 1012 may be, but is not limited to, 15 degrees, 25 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, etc. The angle between the third section 1021 and the fourth section 1022 may also be, but is not limited to, 15 degrees, 25 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, etc. The angle between the first section 1011 and the second section 1012 may be equal to or different from the angle between the third section 1021 and the fourth section 1022.

[0077] In the above technical solution, the first flow channel 101 and the second flow channel 102 are V-shaped as a whole, which can adapt to the narrow area 211 with gradually shrinking width, and can achieve a better cooling effect for the narrow area 211 of this shape, thereby improving the reliability of the cold shield device 1000, thereby enhancing the adaptability of the cooling dual-flow channel structure 100 of the nuclear fusion cold shield device to meet different usage requirements.

[0078] In some embodiments of the present invention, the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 are connected to the cold plate 10 by welding, bonding, hot-melt pipe sleeve connection, etc. For example, the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 are connected to the cold plate 10 by welding.

[0079] In some embodiments of the present invention, the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 are made of the same material as the cold plate 10. It is understood that by making the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 of the same material as the cold plate 10, material contamination during the manufacturing process of the cold shield device 1000 can be prevented.

[0080] Optionally, the material of the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, the fourth pipe segment 32, and the cold plate 10 may be, but is not limited to, stainless steel, aluminum alloy, oxygen-free copper, etc. For example, the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, the fourth pipe segment 32, and the cold plate 10 may all be made of stainless steel.

[0081] In some embodiments of the present invention, the cross-sectional area of ​​the first flow channel 101 is larger than the cross-sectional areas of the first and second pipe segments 21 and 22; and the cross-sectional area of ​​the second flow channel 102 is larger than the cross-sectional areas of the third and fourth pipe segments 31 and 32. This arrangement increases the flow rate of the cooling medium within the first and second flow channels 101 and 102, thereby improving the cooling and heat exchange efficiency of the cold plate 10.

[0082] In some embodiments of the present invention, the cross-sections of the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 are circular, and the cross-sections of the first flow channel 101 and the second flow channel 102 are both slit-shaped. It will be appreciated that the slit-shaped cross-sections of the first and second flow channels 101, 102 facilitate achieving a larger cross-section, and the first and second flow channels 101, 102 and the cold shield panel 210 have a larger heat exchange surface, thereby improving cooling efficiency.

[0083] In some embodiments of the present invention, Figure 1 As shown, the minimum distance between the first pipe segment 21 and the third pipe segment 31 at one end close to the cold plate 10 is L1, where 40 mm ≤ L1 ≤ 60 mm; the minimum distance between the second pipe segment 22 and the fourth pipe segment 32 at one end close to the cold plate 10 is L2, where 40 mm ≤ L2 ≤ 60 mm.

[0084] The minimum distance between the ends of the first tube segment 21 and the third tube segment 31 near the cold plate 10 may refer to the distance between the outermost surfaces of the two tube segments rather than the center-to-center distance. L1 may be, but is not limited to, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 52 mm, 55 mm, 58 mm, 60 mm, etc.

[0085] The minimum distance between the second tube segment 22 and the fourth tube segment 32 at the end closest to the cold plate 10 may also refer to the distance between the outermost surfaces of the two tube segments rather than the center-to-center distance. L2 may be, but is not limited to, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 52 mm, 55 mm, 58 mm, 60 mm, etc.

[0086] In the above technical solution, a suitable distance is provided between the first pipe segment 21 and the third pipe segment 31 to facilitate connection of the first pipe segment 21 and the third pipe segment 31 to the cold plate 10. For example, when welding, the distance L1 between the first pipe segment 21 and the third pipe segment 31 facilitates access for a welding torch. Similarly, a suitable distance is provided between the second pipe segment 22 and the fourth pipe segment 32 to facilitate connection of the second pipe segment 22 and the fourth pipe segment 32 to the cold plate 10.

[0087] In some embodiments of the present invention, Figure 1 As shown, the wall thickness of the first pipe segment 21 and the second pipe segment 22 is t1, wherein 2mm≤t1≤3mm; the wall thickness of the third pipe segment 31 and the fourth pipe segment 32 is t2, wherein 2mm≤t2≤3mm.

[0088] t1 may be, but is not limited to, 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, etc. t2 may be, but is not limited to, 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, etc. The wall thicknesses of the first pipe segment 21 and the third pipe segment 31 may be equal or unequal.

[0089] In the above technical solution, by setting the wall thickness of the first pipe segment 21, the second pipe segment 22, the third pipe segment 31 and the fourth pipe segment 32 within the above range, the first pipe segment 21, the second pipe segment 22, the third pipe segment 31 and the fourth pipe segment 32 can have appropriate structural strength and rigidity. Since the first pipe segment 21 and the second pipe segment 22 are equal to the pipe diameter and wall thickness of the main cooling pipeline 110, and the third pipe segment 31 and the fourth pipe segment 32 are equal to the pipe diameter and wall thickness of the auxiliary cooling pipeline 120, the main cooling pipeline 110 and the auxiliary cooling pipeline 120 are distributed over the entire surface of the cold shield device 1000. Therefore, the main cooling pipeline 110 and the auxiliary cooling pipeline 120 need to be bent multiple times. The above solution can reduce the risk of the cooling system pipeline breaking during bending, reduce the probability of leakage points, and improve the overall reliability of the cooling system.

[0090] On the other hand, the above solution can also maintain the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 at an appropriate thickness, thereby avoiding material waste caused by thick pipe walls, thereby reducing costs and reducing the weight of the first cooling pipe assembly 20 and the second cooling pipe assembly 30. It also avoids the situation where the pipe walls are too thick and difficult to bend and form.

[0091] In some embodiments of the present invention, the first pipe segment 21 , the second pipe segment 22 , the third pipe segment 31 and the fourth pipe segment 32 may be any one of a round tube, a square tube or a flat-mouth tube.

[0092] Optionally, the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 are circular pipes with an inner diameter of 14 mm to 16 mm. This pipe diameter design allows the first pipe segment 21, the second pipe segment 22, the third pipe segment 31, and the fourth pipe segment 32 to have a larger flow rate, thereby improving cooling efficiency.

[0093] like Figure 7 and Figure 8 As shown, a cold shield device 1000 according to an embodiment of the present invention includes a cold shield body and a cooling system. The cold shield body includes a plurality of cold shield panels 210, which are sequentially spliced ​​into a ring along the circumferential direction, and at least one cold shield panel 210 is provided with a narrow area 211; the cooling system includes a cooling dual-channel structure 100 of a nuclear fusion cold shield device as in any of the embodiments described above, and the cooling dual-channel structure 100 of the nuclear fusion cold shield device can be provided at least on the narrow area 211.

[0094] In conjunction with the foregoing, the cold shield panel 210 can have a relatively spacious area or a relatively narrow area 211. When the cooling system is spread throughout the entire cold shield body, the main cooling pipe 110 and the auxiliary cooling pipe 120 can be bent to cover the relatively spacious area. For the narrow area 211, the cooling dual-channel cooling structure 100 of the nuclear fusion cold shield device can be arranged to achieve cooling and temperature reduction, ensuring the cooling effect of the narrow area 211. The cooling dual-channel cooling structure 100 of the nuclear fusion cold shield device can be set not only in the narrow area 211, but also in other areas of the cold shield body as needed.

[0095] According to the cold shield device 1000 of the embodiment of the present invention, by adopting the cooling dual-flow channel structure 100 of the nuclear fusion cold shield device, the narrow area 211 can be cooled and the temperature can be reduced, which can improve the overall cooling effect of the cold shield body, thereby improving the thermal shielding reliability and thermal shielding performance of the cold shield device 1000.

[0096] In some embodiments of the present invention, the cold plate 10 is connected to the narrow area 211 by welding, or the cold plate 10 and the narrow area 211 are integrally formed.

[0097] It is understood that the surface of the cold plate 10 near the narrow area 211 can be a contoured surface that closely matches the contour of the narrow area 211. For example, it can be, but is not limited to, a flat surface, a curved surface, or a wavy surface. This allows the cold plate 10 to better fit the surface of the narrow area 211, thereby improving the cooling effect. The cold plate 10 and the narrow area 211 of the cold shield panel 210 can be welded or integrally formed.

[0098] A nuclear fusion device according to an embodiment of the present invention includes the cold shield device 1000 as described in the above embodiment.

[0099] According to the nuclear fusion device of the embodiment of the present invention, since the cold shield device 1000 has relatively stable and reliable thermal shielding performance, the use of the cold shield device 1000 has higher thermal shielding properties, which can provide a more stable and reliable low-temperature environment for the superconducting magnet inside the nuclear fusion device, thereby improving the reliability of the nuclear fusion device.

[0100] Other structures and operations of the nuclear fusion device and the cold shield device 1000 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0101] Throughout this specification, references to terms such as "some embodiments," "optionally," "further," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0102] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A cooling double-channel structure for a nuclear fusion cold shield device, characterized in that: The cooling dual-flow channel structure of the nuclear fusion cold shield device is applied to the cold shield device of the nuclear fusion device. The cold shield device includes a narrow area. The cooling dual-flow channel structure of the nuclear fusion cold shield device is arranged on the narrow area. The cooling dual-flow channel structure of the nuclear fusion cold shield device includes: A cold plate, wherein a first flow channel and a second flow channel are provided in the cold plate, the first flow channel and the second flow channel are arranged in a bent manner, the cold plate is provided with a first inlet, a first outlet, a second inlet and a second outlet, the first inlet and the first outlet are connected to the first flow channel, and the second inlet and the second outlet are connected to the second flow channel; a first cold pipe assembly, the first cold pipe assembly comprising a first pipe section and a second pipe section, the first pipe section being connected to the first inlet, and the second pipe section being connected to the first outlet; The second cold pipe assembly includes a third pipe segment and a fourth pipe segment. The third pipe segment is connected to the second inlet, and the fourth pipe segment is connected to the second outlet.

2. The cooling double-channel structure of the nuclear fusion cold shield device according to claim 1 is characterized in that: The first flow channel extends along the outer edge contour of the cold plate, the second flow channel is arranged on the inner side of the cold plate relative to the first flow channel, and the first flow channel and the second flow channel are bent at one end in the longitudinal direction of the cold plate.

3. The cooling double-channel structure of the nuclear fusion cold shield device according to claim 2 is characterized in that: The first flow channel includes a first section, a second section, and a first arc section, the first section and the second section are arranged at an angle and are located on the same side of the first arc section, and the first section is connected to the second section through the first arc section; The second flow channel is arranged in the area surrounded by the first section, the second section and the first arc section, and the second flow channel includes a third section, a fourth section and a second arc section. The third section and the fourth section are arranged at an angle and are located on the same side of the second arc section. The third section is connected to the fourth section through the second arc section.

4. The cooling double-channel structure of the nuclear fusion cold shield device according to claim 3 is characterized in that: The cold plate includes two symmetrically arranged and welded plates, each of which is provided with a first flow groove and a second flow groove. The first flow grooves of the two plates jointly define the first flow channel, and the second flow grooves of the two plates jointly define the second flow channel.

5. The cooling double-channel structure of the nuclear fusion cold shield device according to claim 4 is characterized in that: A first shell wall is formed between the first section and the adjacent side surface of the cold plate, a second shell wall is formed between the second section and the adjacent side surface of the cold plate, a third shell wall is formed between the first arc segment and the adjacent side surface of the cold plate, a fourth shell wall is formed between the third section and the first section, a fifth shell wall is formed between the fourth section and the second section, a sixth shell wall is formed between the fourth section and the third section, and a seventh shell wall is formed between the second arc segment and the first arc segment; wherein the wall thickness of the first shell wall, the second shell wall, the third shell wall, the fourth shell wall, the fifth shell wall, the sixth shell wall and the seventh shell wall is greater than or equal to 3 mm.

6. The cooling double-channel structure of the nuclear fusion cold shield device according to any one of claims 3 to 5, characterized in that: The first section and the second section are arranged parallel to each other, and the third section and the fourth section are arranged parallel to each other.

7. The cooling double-channel structure of the nuclear fusion cold shield device according to any one of claims 3 to 5, characterized in that: The included angle between the first section and the second section is greater than 0 degree and less than 90 degrees; the included angle between the third section and the fourth section is greater than 0 degree and less than 90 degrees.

8. A cold shield device, characterized in that: include: A cold shield body, the cold shield body comprising a plurality of cold shield panels, the plurality of cold shield panels being sequentially spliced ​​in a circumferential direction to form a ring, at least one of the cold shield panels being provided with a narrow area; A cooling system, comprising a cooling double-channel structure for cooling the nuclear fusion cold shield device according to any one of claims 1 to 7, wherein the cooling double-channel structure for cooling the nuclear fusion cold shield device is arranged on the narrow area.

9. The cold shield device according to claim 8, characterized in that: The cold plate is connected to the narrow area by welding, or the cold plate and the narrow area are integrally formed.

10. A nuclear fusion device, characterized in that: Comprising the cold shield device according to claim 8 or 9.

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