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

Abstract

The invention relates to the technical field of fusion devices, and discloses a cooling double-flow-channel structure of a nuclear fusion cold shield device, the cold shield device and a nuclear fusion device.The cooling double-flow-channel structure comprises a cold plate, a first flow channel and a second flow channel are arranged in the cold plate and are arranged in a bent mode, and the first flow channel and the second flow channel are communicated with each other; 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 communicate with the first runner, and the second inlet and the second outlet communicate with the second runner; the first cooling pipe assembly comprises a first pipe section and a second pipe section, the first pipe section is communicated with the first inlet, and the second pipe section is communicated with the first outlet; the second cooling pipe assembly comprises a third pipe section and a fourth pipe section, the third pipe section is communicated with the second inlet, and the fourth pipe section is communicated with the second outlet. The device can be arranged in a narrow area of the cold shield device, and the overall heat shielding reliability and heat shielding performance of the cold shield device are improved.

Description

Technical Field

[0001] The 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 the fusion reactor require an extremely low temperature environment, and a cold shielding layer is needed to shield the influence of thermal radiation on the low temperature magnets. The structure of the cold shield device mainly includes a cold shield panel and cooling pipelines. Due to the positional relationship between the cold shield and other devices in the fusion reactor, the cold shield needs to be avoided, so the shape of the cold shield panel is more complicated in some areas. In order to ensure the reliability of the cold shield, two main and auxiliary cooling pipelines need to be set. Due to the limitations of the cooling pipe size and the distance between the main and auxiliary double pipelines required by the welding conditions, conventional pipe laying methods are difficult in relatively narrow areas. The temperature in some areas of the cold shield is high, which reduces the performance of the cold shield. 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 cooling double-flow channel structure of a nuclear fusion cold shield device, wherein the cooling double-flow channel structure of the nuclear fusion cold shield device 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 cooling dual-channel structure of a nuclear fusion cold shield device includes: a cold plate, a first channel and a second channel are arranged 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 double - flow channel structure of the nuclear fusion cold shield device of the embodiments of the present invention, the cooling double - flow channel structure of the nuclear fusion cold shield device has a relatively small installation and layout space, can be arranged in the narrow area of the cold shield device, improves the layout flexibility of the cooling system, can also reduce the bending times of the cooling pipes, reduces the risk of breakage and leakage of the cooling pipes, improves the system stability and reliability of the cooling system, and moreover, the cold plate has a larger cooling surface, which can improve the cooling efficiency of the narrow area, thereby improving the thermal shielding reliability and thermal shielding performance of the overall 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 inside 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 length 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 arranged at an angle and on the same side of the first arc section. 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. 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 on the same side of the second arc section. 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 - together plate members. Each plate member is provided with a first flow groove and a second flow groove. The first flow grooves of the two plate members jointly define the first flow channel, and the second flow grooves of the two plate members 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 section 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, and 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 section and the first arc section; wherein, the wall thicknesses 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 are 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 included angle between the first section and the second section is greater than 0 degrees and less than 90 degrees; the included angle between the third section and the fourth section is greater than 0 degrees and less than 90 degrees.

[0014] A cold screen device according to an embodiment of the present invention includes: a cold screen main body, the cold screen main body includes a plurality of cold screen panels, the plurality of cold screen panels are sequentially spliced into a ring along the circumferential direction, and at least one of the cold screen panels is provided with a narrow area; a cooling system, the cooling system includes the cooling double-channel structure of the nuclear fusion cold screen device described in any one of the foregoing, and the cooling double-channel structure of the nuclear fusion cold screen device can be at least arranged on the narrow area.

[0015] In some embodiments of the present invention, the cold plate is welded to the narrow area, 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 screen device described above.

[0017] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the 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 obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein: Figure 1 is a top view of the cooling double-channel structure of the nuclear fusion cold screen device provided by some embodiments of the present invention; Figure 2 is an internal structure schematic diagram of the cooling double-channel structure of the nuclear fusion cold screen device provided by some embodiments of the present invention; Figure 3 is a top view of the cold plate provided by some embodiments of the present invention; Figure 4 is an internal structure schematic diagram of the cold plate provided by some embodiments of the present invention; Figure 5 is Figure 1 a sectional view taken along the line A-A of Figure 6 is a three-dimensional structure schematic diagram of the plate member provided by some embodiments of the present invention; Figure 7 is a partial structure schematic diagram of the cold screen device and the cold screen panel provided by some embodiments of the present invention Figure 1 ; Figure 8The partial structural schematic diagram of the cold screen device and the cold screen panel provided by some embodiments of the present invention Figure 2 。

[0019] Reference numerals: 1000, cold screen device; 100, cooling double-channel structure of the nuclear fusion cold screen device; 10, cold plate; 101, first flow channel; 1011, first section; 1012, second section; 1013, first arc segment; 102, second flow channel; 1021, third section; 1022, fourth section; 1023, second arc segment; 10a, first inlet; 10b, first outlet; 10c, second inlet; 10d, second outlet; 11, plate member; 11a, first flow groove; 11b, second flow groove; 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; 20, first cold pipe assembly; 21, first pipe section; 22, second pipe section; 30, second cold pipe assembly; 31, third pipe section; 32, fourth pipe section; 110, main cooling pipeline; 120, auxiliary cooling pipeline; 210, cold screen panel; 211, narrow area; 212, open area. Detailed implementation manners

[0020] 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.

[0021] 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", "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.

[0022] In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or weight.

[0023] 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 "install", "connect", and "couple" 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 components. 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 situations.

[0024] As Figure 7 and Figure 8 shown, the cooling double-flow channel structure 100 of the nuclear fusion cold shield device in the embodiment of the present invention can be applied to the cold shield device 1000 of a nuclear fusion device. The cold shield device 1000 includes a cold shield main body and a cooling system. The cold shield main 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, and at least one cold shield panel 210 is provided with a narrow area 211; the cooling system includes at least one cooling double-flow channel structure 100 of the nuclear fusion cold shield device, and the cooling double-flow channel structure 100 of the nuclear fusion cold shield device can be at least arranged on the narrow area 211.

[0025] It can be understood that the above cooling system may further include a main cooling pipeline 110 and a secondary cooling pipeline 120, and the cooling double-flow channel structure 100 of the nuclear fusion cold shield device is serially arranged in the loop of the main cooling pipeline 110 and the secondary cooling pipeline 120. Since structures such as windows are provided on the cold shield main body, the cold shield panel 210 has an open area 212 with a relatively open space and a narrow area 211 with a relatively small space. When arranging the cooling system, it is relatively simple to arrange the main cooling pipeline 110 and the secondary cooling pipeline 120 in the open area 212. However, for the narrow area 211, due to space limitations, it is relatively difficult to arrange the main cooling pipeline 110 and the secondary cooling pipeline 120. Therefore, the cooling double-flow channel structure 100 of the nuclear fusion cold shield device can be arranged in the narrow area 211 to achieve the cooling of the narrow area 211.

[0026] Next, refer to Figures 1 - 6 , to describe the cooling double-flow channel structure 100 of the nuclear fusion cold shield device in the embodiment of the present invention.

[0027] As Figure 1 and Figure 2As shown in the figure, a cooling double-channel structure 100 of 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. The cold plate 10 is provided with a first flow channel 101 and a second flow channel 102. The first flow channel 101 and the second flow 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 are connected to the first flow channel 101, and the second inlet 10c and the second outlet 10d are connected to the second flow channel 102. The first cold pipe assembly 20 includes a first pipe section 21 and a second pipe section 22. The first pipe section 21 is connected to the first inlet 10a, and the second pipe section 22 is connected to the first outlet 10b. The second cold pipe assembly 30 includes a third pipe section 31 and a fourth pipe section 32. The third pipe section 31 is connected to the second inlet 10c, and the fourth pipe section 32 is connected to the second outlet 10d.

[0028] In the above technical solution, the cooling double-channel structure 100 of the nuclear fusion cold shield device is a double-channel structure as a whole. The first cold pipe assembly 20 and the first flow channel 101 form a cooling flow path, and the second cold pipe assembly 30 and the second flow channel 102 form another cooling flow path. In this way, there are two main and auxiliary cooling flow paths in the cooling double-channel structure 100 of the nuclear fusion cold shield device. When cooling, one of the two cooling flow paths can be selected to be opened for cooling, or both can be opened for cooling at the same time.

[0029] In the cooling flow path formed by the first cold pipe assembly 20 and the first flow channel 101, the first pipe section 21 can flow the cooling medium through the first inlet 10a into the first flow channel 101, and then flow out from the second pipe section 22 through the first outlet 10b. In the cooling flow path formed by the second cold pipe assembly 30 and the second flow channel 102, the third pipe section 31 can flow the cooling medium through the second inlet 10c into the second flow channel 102, and then flow out from the fourth pipe section 32 through the second outlet 10d.

[0030] Compared with the layout of conventional cooling pipelines, the cooling double-channel structure 100 of the nuclear fusion cold shield device of the present invention can be more easily arranged in the narrow area 211. Since the first flow channel 101 and the second flow channel 102 in the cold plate 10 are bent, the cooling medium can flow along the bent first flow channel 101 and the second flow channel 102 through the narrow area 211 for cooling. Moreover, compared with the cooling pipeline, the cold plate 10 has a larger surface and a larger contact surface with the cold shield panel 210, thereby improving the heat exchange efficiency of the cold plate 10 with respect to the cold shield panel 210.

[0031] In the cold shield device 1000 of a nuclear fusion device, since the diameters of the main cooling pipeline 110 and the secondary cooling pipeline 120 of the cooling system are generally small, the cooling double-flow channel structure 100 of the nuclear fusion cold shield device can enable the cold plate 10 to play a cooling role at the position where the narrow area 211 is located. Thereby, the number of bends of the main cooling pipeline 110 and the secondary cooling pipeline 120 on the cold shield panel 210 can be reduced, the risk of damage to the main cooling pipeline 110 and the secondary cooling pipeline 120 due to a large number of bends can be reduced, the system reliability of the cooling system can be improved, and further, the reliability of the cold shield device 1000 can be improved. Among them, the cooling double-flow channel structure 100 of the nuclear fusion cold shield device in the embodiment of the present invention can be arranged in the narrow area 211 or in the open area 212. By adopting the cooling double-flow channel structure 100 of the nuclear fusion cold shield device, the bent pipeline structure can be replaced, and the overall number of bends of the cooling system can be reduced.

[0032] It should be noted that in the above embodiment, the cooling medium flowing inside the cooling double-flow channel structure 100 of the nuclear fusion cold shield device can be, but is not limited to, helium, liquid nitrogen, liquid hydrogen, etc.

[0033] According to the cooling double-flow channel structure 100 of the nuclear fusion cold shield device in the embodiment of the present invention, the cooling double-flow channel structure 100 of the nuclear fusion cold shield device has a small installation and layout space, can be arranged in the narrow area 211 of the cold shield device 1000, improves the layout flexibility of the cooling system, can also reduce the number of bends of the cooling pipeline, reduces the risk of damage and leakage of the cooling pipeline, improves the system stability and reliability of the cooling system, and moreover, the cold plate 10 has a larger cooling surface, can improve the cooling efficiency of the narrow area 211, and thereby can improve the overall thermal shielding reliability and thermal shielding performance of the cold shield device 1000.

[0034] In some embodiments of the present invention, such as Figure 2 and Figure 4 shown, the first flow channel 101 extends along the outer edge contour of the cold plate 10, the second flow channel 102 is arranged inside the cold plate 10 relative to the first flow channel 101, and 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.

[0035] The "outer edge contour of the cold plate 10" can refer to the edge contour of the outer shape of the cold plate 10. Referring to Figure 2 , the cold plate 10 can be a straight plate with a circular arc at one end, then the outer edge contour of the cold plate 10 can be U-shaped, and the first flow channel 101 can extend along the U-shaped outer edge contour of the cold plate 10. Referring to Figure 4, the cold plate 10 can be a plate structure of a V-shaped plate and a triangular plate, so the outer edge contour of the cold plate 10 can be V-shaped, and the first flow channel 101 can extend along the V-shaped outer edge contour of the cold plate 10. That is to say, according to the different shapes of the cold plate 10, the extension trajectories of the first flow channel 101 are different, but they all extend along the outer edge contour of the cold plate 10.

[0036] "The second flow channel 102 is arranged on the inner side of the cold plate 10 relative to the first flow channel 101", which can be understood as that the second flow channel 102 and the first flow channel 101 are arranged in an inner and outer layer inside the cold plate 10.

[0037] "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", which can make the first flow channel 101 and the second flow channel 102 have a longer extension length inside the cold plate 10. The first flow channel 101 and the second flow channel 102 can take a longer path, which is more conducive to realizing the cooling of the slender and narrow area 211.

[0038] In the above technical solution, by arranging 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, the overall structure of the cold plate 10 can be made more compact, and while ensuring higher cooling efficiency, the size of the cold plate 10 can be reduced, which is convenient for arranging in the narrow area 211 with a smaller size.

[0039] In some embodiments of the present invention, as Figure 2 and Figure 4 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 arranged at an angle and are on the same side of the first arc section 1013. 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 the 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 arranged at an angle and are on the same side of the second arc section 1023. The third section 1021 is connected to the fourth section 1022 through the second arc section 1023.

[0040] It should be noted that the above first section 1011, second section 1012, third section 1021, and fourth section 1022 can be straight pipe sections, can also be substantially straight pipe sections, or can also be pipe sections with a small curvature. The first arc section 1013 and the second arc section 1023 can be circular arc pipe sections, can also be pipe sections with a certain radian, or can also refer to pipe sections with an arc-shaped part of the pipe wall. For example, referring to Figure 4, the second arc segment 1023 is a small chamber structure, and the tube wall on the side close to the third section 1021 and the fourth section 1022 is an arc wall.

[0041] In the above technical solution, for the first flow channel 101, the first section 1011 and the second section 1012 can achieve one-in and one-out of the cooling medium, and the first arc segment 1013 can connect the first section 1011 and the second section 1012, making the first flow channel 101 as a whole in a U shape or a V shape, which is convenient for transporting the cooling medium. Similarly, for the second flow channel 102, the third section 1021 and the fourth section 1022 can achieve one-in and one-out of the cooling medium, and the second arc segment 1023 can connect the third section 1021 and the fourth section 1022, making the first flow channel 101 as a whole in a U shape or a V shape, which is convenient for transporting the cooling medium.

[0042] In some embodiments of the present invention, as Figure 2 shown, one end of the first section 1011 away from the first arc segment 1013 is bent and penetrates through the cold plate 10 to form a first inlet 10a, and one end of the second section 1012 away from the first arc segment 1013 is bent and penetrates through the cold plate 10 to form a first outlet 10b; one end of the third section 1021 away from the second arc segment 1023 is bent and penetrates through the cold plate 10 to form a second inlet 10b, and one end of the fourth section 1022 away from the second arc segment 1023 is bent and penetrates through the cold plate 10 to form a second outlet 10d. With this structure, the arrangement positions of the first pipe section 21, the second pipe section 22, the third pipe section 31 and the fourth pipe section 32 can be adjusted as needed to meet different usage requirements.

[0043] In some embodiments of the present invention, as Figure 4 shown, one end of the first section 1011 penetrating through the cold plate 10 in a straight line direction forms a first inlet 10a, and the other end of the second section 1012 penetrating through the cold plate 10 in a straight line direction forms a first outlet 10b; one end of the third section 1021 penetrating through the cold plate 10 in a straight line direction forms a second inlet 10b, and the other end of the fourth section 1022 penetrating through the cold plate 10 in a straight line direction forms a second outlet 10d. With this structure, the arrangement positions of the first pipe section 21, the second pipe section 22, the third pipe section 31 and the fourth pipe section 32 can be adjusted as needed to meet different usage requirements.

[0044] In some embodiments of the present invention, as Figure 5 and Figure 6 shown, the cold plate 10 includes two symmetrically arranged and welded plate members 11. Each plate member 11 is provided with a first flow groove 11a and a second flow groove 11b. The first flow grooves 11a of the two plate members 11 jointly define the first flow channel 101, and the second flow grooves 11b of the two plate members 11 jointly define the second flow channel 102.

[0045] It can be understood that each plate member 11 is processed to form a semi-groove structure for the first flow channel 101 and a semi-groove structure for the second flow channel 102, that is, the first flow channel groove 11a and the second flow channel groove 11b. The cold plate 10 can be formed by splicing and welding two plate members 11 together. Thus, the two first flow channel grooves 11a are jointly assembled into a complete first flow channel 101, and the two second flow channel grooves 11b are assembled into a complete second flow channel 102. By setting the cold plate 10 in the above structure, the forming difficulty of the cold plate 10 can be reduced, and thus the manufacturing cost can be reduced.

[0046] Optionally, the two plate members 11 can be welded together by diffusion welding.

[0047] In some embodiments of the present invention, as Figure 2 and Figure 4 shown, a first shell wall 1031 is formed between the first section 1011 and the adjacent side surface of the cold plate 10, a second shell wall 1032 is formed between the second section 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 section 1021 and the first section 1011, a fifth shell wall 1035 is formed between the fourth section 1022 and the second section 1012, and a sixth shell wall 1036 is formed between the fourth section 1022 and the third section 1021. A seventh shell wall 1037 is formed between the second arc segment 1023 and the first arc segment 1013; wherein, the wall 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 are greater than or equal to 3 mm.

[0048] The wall 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 can be, but are not limited to, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, etc. Among them, the wall 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 can be equal or unequal.

[0049] It can be understood that since the cold plate 10 is formed by splicing and welding two plate members 11 together, it is necessary to ensure that the first flow grooves 11a of the two plate members 11 can be aligned and the second flow grooves 11b can be aligned, and a certain tolerance is allowed when the two half grooves are aligned. 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, there can be a certain error when the corresponding shell walls of the two plate members 11 are aligned, ensuring that the two plate members 11 can be welded together after splicing, and also ensuring that the two plate members 11 have a suitable-sized docking surface, reducing the risk that the two plate members 11 cannot be aligned and welded due to deformation during the welding process.

[0050] In some embodiments of the present invention, 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 and less than or equal to 6 mm.

[0051] 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 can be avoided that the wall thickness of multiple shell walls is too large, saving the material cost of the cold plate 10, and also controlling the overall size of the cold plate 10 within a suitable range, facilitating the arrangement in the narrow area 211.

[0052] In some embodiments of the present invention, as Figure 2 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. That is to say, the first flow channel 101 and the second flow channel 102 are integrally U-shaped. With the first flow channel 101 and the second flow channel 102 having such a structure, the cold plate 10 can be a flat plate-like structure, which is overall long and strip-shaped, facilitating the arrangement in the narrow and long narrow area 211.

[0053] In some embodiments of the present invention, as Figure 4 shown, the included angle between the first section 1011 and the second section 1012 is greater than 0 degrees and less than 90 degrees; the included angle between the third section 1021 and the fourth section 1022 is greater than 0 degrees and less than 90 degrees.

[0054] The included angle between the first section 1011 and the second section 1012 can 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 included angle between the third section 1021 and the fourth section 1022 can 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. Among them, the included angle between the first section 1011 and the second section 1012 and the included angle between the third section 1021 and the fourth section 1022 can be equal or unequal.

[0055] In the above technical solution, the first flow channel 101 and the second flow channel 102 as a whole are in a V shape, which can adapt to the narrow area 211 with a gradually shrinking width, and can achieve a better cooling effect on the narrow area 211 of this shape, improving the reliability of the cold screen device 1000. Thus, the adaptability of the cooling double-flow channel structure 100 of the nuclear fusion cold screen device can be enhanced to meet different usage requirements.

[0056] In some embodiments of the present invention, the connection methods of the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 to the cold plate 10 are any one of welding, bonding, hot melt pipe socket connection, etc. For example, the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 are connected to the cold plate 10 by welding.

[0057] In some embodiments of the present invention, the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 are made of the same material as the cold plate 10. It can be understood that by making the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 of the same material as the cold plate 10, the problem of material contamination during the manufacturing process of the cold screen device 1000 can be prevented.

[0058] Optionally, the materials of the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 and the cold plate 10 can be, but are not limited to, stainless steel, aluminum alloy, oxygen-free copper, etc. For example, the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 and the cold plate 10 can all be made of stainless steel.

[0059] In some embodiments of the present invention, the area of the flow channel cross-section of the first flow channel 101 is larger than the area of the pipe cross-sections of the first pipe section 21 and the second pipe section 22; the area of the flow channel cross-section of the second flow channel 102 is larger than the area of the pipe cross-sections of the third pipe section 31 and the fourth pipe section 32. By adopting this method, the circulation amount of the cooling medium inside the first flow channel 101 and the second flow channel 102 can be increased, thereby facilitating the improvement of the cooling and heat exchange efficiency of the cold plate 10.

[0060] 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 waist-shaped holes. It can be understood that the cross-sections of the first flow channel 101 and the second flow channel 102 being waist-shaped holes are conducive to achieving a larger cross-section, and the first flow channel 101 and the second flow channel 102 can have a larger heat exchange surface with the cold screen panel 210, which can improve the cooling efficiency.

[0061] In some embodiments of the present invention, as Figure 1 shown, the minimum distance between one ends of the first pipe segment 21 and the third pipe segment 31 close to the cold plate 10 is L1, where 40 mm ≤ L1 ≤ 60 mm; the minimum distance between one ends of the second pipe segment 22 and the fourth pipe segment 32 close to the cold plate 10 is L2, where 40 mm ≤ L2 ≤ 60 mm.

[0062] The minimum distance between one ends of the first pipe segment 21 and the third pipe segment 31 close to the cold plate 10 may refer to the distance between the outermost surfaces of the two pipe segments rather than the center distance. L1 can be, but is not limited to, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 52 mm, 55 mm, 58 mm, 60 mm, and so on.

[0063] The minimum distance between one ends of the second pipe segment 22 and the fourth pipe segment 32 close to the cold plate 10 may also refer to the distance between the outermost surfaces of the two pipe segments rather than the center distance. L2 can be, but is not limited to, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 52 mm, 55 mm, 58 mm, 60 mm, and so on.

[0064] In the above technical solution, an appropriate distance exists between the first pipe segment 21 and the third pipe segment 31, which facilitates the connection between the first pipe segment 21 and the third pipe segment 31 and the cold plate 10. For example, when connected by welding, the distance L1 between the first pipe segment 21 and the third pipe segment 31 facilitates the welding gun to enter for welding operations. Similarly, an appropriate distance also exists between the second pipe segment 22 and the fourth pipe segment 32, which facilitates the connection between the second pipe segment 22 and the fourth pipe segment 32 and the cold plate 10.

[0065] In some embodiments of the present invention, as Figure 1 shown, the wall thickness of the first pipe segment 21 and the second pipe segment 22 is t1, where 2 mm ≤ t1 ≤ 3 mm; the wall thickness of the third pipe segment 31 and the fourth pipe segment 32 is t2, where 2 mm ≤ t2 ≤ 3 mm.

[0066] t1 can be, but is not limited to, 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, etc. t2 can be, but is not limited to, 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, etc. Among them, the wall thicknesses of the first pipe section 21 and the third pipe section 31 can be equal or unequal.

[0067] In the above technical solution, by setting the wall thicknesses of the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 within the above range, the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 can have appropriate structural strength and rigidity. Since the diameters and wall thicknesses of the first pipe section 21 and the second pipe section 22 are equal to those of the main cooling pipeline 110, and the diameters and wall thicknesses of the third pipe section 31 and the fourth pipe section 32 are equal to those of the auxiliary cooling pipeline 120, and the main cooling pipeline 110 and the auxiliary cooling pipeline 120 cover the entire surface of the cold screen device 1000, the main cooling pipeline 110 and the auxiliary cooling pipeline 120 need to be bent multiple times. Adopting the above solution can reduce the risk of the pipeline of the cooling system breaking during bending and reduce the probability of leakage points, and can improve the overall reliability of the cooling system.

[0068] On the other hand, adopting the above solution can also keep the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 at an appropriate thickness, avoid material waste caused by too large a wall thickness, be beneficial to cost reduction, and can also reduce the weight of the first cold pipe assembly 20 and the second cold pipe assembly 30. Moreover, it can also avoid the situation where it is not conducive to the bending and forming of the pipeline due to too thick a wall thickness.

[0069] In some embodiments of the present invention, the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 can be any one of a circular pipe, a square pipe, or a flat-mouth pipe.

[0070] Optionally, the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 are circular pipes, and the inner diameter of the pipe orifice is 14mm to 16mm. Adopting this pipe diameter design can make the first pipe section 21, the second pipe section 22, the third pipe section 31, and the fourth pipe section 32 have a large flow rate, which is beneficial to improving the cooling efficiency.

[0071] Such as Figure 7 and Figure 8As shown, a cold shield device 1000 according to an embodiment of the present invention includes a cold shield main body and a cooling system. The cold shield main body includes a plurality of cold shield panels 210. The plurality of cold shield panels 210 are sequentially spliced into a ring shape along the circumferential direction, and at least one cold shield panel 210 is provided with a narrow area 211. The cooling system includes the cooling double-channel structure 100 of the nuclear fusion cold shield device in any of the previous embodiments, and the cooling double-channel structure 100 of the nuclear fusion cold shield device can be provided at least on the narrow area 211.

[0072] Combined with the previous text, the cold shield panel 210 can have an area with relatively generous dimensions and also a narrow area 211 with relatively small dimensions. During the process of the cooling system covering the entire cold shield main body, the main cooling pipeline 110 and the secondary cooling pipeline 120 can be bent and covered in the area with relatively generous space. For the narrow area 211, the cooling and temperature reduction can be achieved by arranging the cooling double-channel structure 100 of the nuclear fusion cold shield device, ensuring the cooling effect of the narrow area 211. Among them, the cooling double-channel structure 100 of the nuclear fusion cold shield device can be provided not only on the narrow area 211 but also at other area positions of the cold shield main body according to needs.

[0073] For the cold shield device 1000 according to an embodiment of the present invention, by adopting the cooling double-channel structure 100 of the nuclear fusion cold shield device, the cooling and temperature reduction of the narrow area 211 can be achieved, which can improve the overall cooling effect of the cold shield main body, and further improve the thermal shielding reliability and thermal shielding performance of the cold shield device 1000.

[0074] In some embodiments of the present invention, the cold plate 10 is welded to the narrow area 211, or the cold plate 10 and the narrow area 211 are integrally formed.

[0075] It can be understood that the surface of the cold plate 10 close to the narrow area 211 can be a profiling surface, similar to the contour shape of the narrow area 211. For example, it can be but is not limited to a plane, an arc surface, or a wavy surface, etc. This can make the surface fit degree between the cold plate 10 and the narrow area 211 higher and improve the cooling effect. The cold plate 10 and the narrow area 211 of the cold shield panel 210 can be welded together or integrally formed.

[0076] A nuclear fusion device according to an embodiment of the present invention includes the cold shield device 1000 in the previous embodiment.

[0077] For the nuclear fusion device according to an embodiment of the present invention, since the cold shield device 1000 has relatively stable and reliable thermal shielding performance, adopting the cold shield device 1000 has higher thermal shielding performance, can provide a more stable and reliable low-temperature environment for the superconducting magnet inside the nuclear fusion device, and improve the reliability of the nuclear fusion device.

[0078] The other configurations and operations of the nuclear fusion device and the cold screen device 1000 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0079] 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] 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 purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Cooling double-flow channel structure of a nuclear fusion cold screen device, characterized in that Comprising: A cold plate, within which a first flow channel and a second flow channel are provided. The first flow channel and the second flow 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 in communication with the first flow channel, and the second inlet and the second outlet are in communication with the second flow channel; A first cold pipe assembly, which includes a first pipe section and a second pipe section. The first pipe section is in communication with the first inlet, and the second pipe section is in communication with the first outlet; A second cold pipe assembly, which includes a third pipe section and a fourth pipe section. The third pipe section is in communication with the second inlet, and the fourth pipe section is in communication with the second outlet.

2. The cooling double-flow channel structure of the nuclear fusion cold screen device according to claim 1, wherein 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. The first flow channel and the second flow channel are bent at one end in the length direction of the cold plate.

3. The cooling double-flow channel structure of the nuclear fusion cold screen device according to claim 2, 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 on the same side of the first arc section. The first section is connected to the second section through the first arc section; The second flow channel is arranged in the region surrounded 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 arranged at an angle and 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-flow channel structure of the nuclear fusion cold screen device according to claim 3, characterized in that, The cold plate includes two symmetrically arranged and welded plate members. Each plate member is provided with a first flow groove and a second flow groove. The first flow grooves of the two plate members jointly define the first flow channel, and the second flow grooves of the two plate members jointly define the second flow channel.

5. The cooling double-flow channel structure of the nuclear fusion cold shield device according to claim 4, 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 section 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. And a sixth shell wall is formed between the fourth section and the third section. A seventh shell wall is formed between the second arc section and the first arc section; 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-flow 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-flow channel structure of the nuclear fusion cold shield device according to any one of claims 3 to 5, characterized in that The angle between the first section and the second section is greater than 0 degrees and less than 90 degrees; the angle between the third section and the fourth section is greater than 0 degrees and less than 90 degrees.

8. A cold shield device, characterized in that, Comprising: A cold screen main body, which includes a plurality of cold screen panels. The plurality of cold screen panels are sequentially spliced into a ring along the circumferential direction. At least one of the cold screen panels is provided with a narrow area; Cooling system, the cooling system includes a cooling double-channel structure of the nuclear fusion cold screen device as described in any one of claims 1 to 7, and the cooling double-channel structure of the nuclear fusion cold screen device can be at least arranged on the narrow area.

9. The cold screen device according to claim 8, characterized in that, The cold plate is welded to the narrow area, or the cold plate and the narrow area are integrally formed.

10. A nuclear fusion device, characterized in that, It includes a cold screen device as described in claim 8 or 9.

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