Cooling pipeline system

Abstract

The invention belongs to the technical field of high-temperature superconducting, and discloses a cooling pipeline system, which comprises an input unit, an internal cooling unit, a circumferential cooling unit, an end part cooling unit and an output unit, and is characterized in that the internal cooling unit comprises a plurality of coil cooling pipes which are arranged in parallel so as to realize uniform cooling of the interior of a high-temperature superconducting magnet. The circumferential cooling unit comprises a first circumferential cooling structure and a second circumferential cooling structure which are arranged in a central symmetry mode so that the high-temperature superconducting magnet can be evenly cooled in the circumferential direction of the high-temperature superconducting magnet. The end cooling unit comprises a first end cooling structure and a second end cooling structure which are arranged at the two ends of the high-temperature superconducting magnet respectively so as to cool the two ends of the high-temperature superconducting magnet. According to the cooling pipeline system, the interior of the high-temperature superconducting magnet can be uniformly cooled, the circumferential direction and the two ends of the high-temperature superconducting magnet can also be cooled, the high-temperature superconducting magnet is separated from an external temperature area, heat leakage of the magnet is effectively avoided, and a stable low-temperature environment is provided for the high-temperature superconducting magnet.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature superconductivity, and in particular to a cooling pipeline system. Background Art

[0002] High-temperature superconducting magnets generally require an operating temperature of 30K-70K, so they must be equipped with a corresponding cooling system. At present, the cooling methods of the low-temperature cooling system of superconducting magnets are mainly divided into conduction cooling and low-temperature medium immersion cooling. Among them, conduction cooling has good economy and is widely used. Conduction cooling is further divided into solid conduction cooling and pipeline cooling. Fixed conduction cooling requires the refrigeration cold head to be installed on the magnet, which is not applicable in some environments.

[0003] The coil cooling pipeline systems disclosed in the prior art are mostly suitable for working environments of ±40°C and are mostly used for heat dissipation. They cannot provide a low-temperature environment for the superconducting magnet that is uniformly cooled as a whole and can be maintained stably. Summary of the invention

[0004] The object of the present invention is to provide a cooling pipeline system, which can achieve overall uniform cooling of a high-temperature superconducting magnet and provide a stable low-temperature environment for the high-temperature superconducting magnet.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Provided is a cooling pipeline system for cooling a high-temperature superconducting magnet, wherein the high-temperature superconducting magnet comprises a main frame, a superconducting coil group and a fixing cylinder, wherein the superconducting coil group is arranged on the main frame, the superconducting coil group comprises a plurality of superconducting coils arranged in parallel, and the fixing cylinder is sleeved on the outside of the superconducting coil group;

[0007] The cooling pipeline system comprises:

[0008] An input unit is configured to be connected to an external cooling system;

[0009] An internal cooling unit, comprising a plurality of coil cooling tubes arranged in parallel, each of the coil cooling tubes being connected to the input unit, and one coil cooling tube being sandwiched between two adjacent superconducting coils;

[0010] A circumferential cooling unit, comprising a first circumferential cooling structure and a second circumferential cooling structure arranged in a central symmetrical manner, wherein the first circumferential cooling structure comprises a plurality of first circumferential cooling tubes, and the second circumferential cooling structure comprises a plurality of second circumferential cooling tubes, wherein the fixed cylinder is provided with a plurality of through holes spaced apart along the circumference, each of the through holes extending along the axial direction of the fixed cylinder, and the first circumferential cooling tube and the second circumferential cooling tube are passed through the corresponding through holes; and each of the first circumferential cooling tubes is connected to the input unit;

[0011] The end cooling unit comprises a first end cooling structure and a second end cooling structure respectively arranged at two ends of the high temperature superconducting magnet, wherein the first end cooling structure comprises a first heat exchange tube arranged at the first end of the main skeleton, the first circumferential cooling tube is connected to the inlet of the first heat exchange tube, and the second circumferential cooling tube is connected to the outlet of the first heat exchange tube; the second end cooling structure comprises a second heat exchange tube arranged at the second end of the main skeleton, and a plurality of the second circumferential cooling tubes and a plurality of the coil cooling tubes are all connected to the inlet of the second heat exchange tube;

[0012] The output unit is connected between the outlet of the second heat exchange tube and the external cooling system.

[0013] As an optional solution for the cooling pipe system, the internal cooling unit also includes a plurality of cold conduction plates, each of which is abutted between two adjacent superconducting coils, and each of which is provided with a fixed groove, and the plurality of coil cooling tubes are embedded in the plurality of fixed grooves one by one.

[0014] As an optional solution of the cooling pipeline system, the first end cooling structure further includes a first heat exchange ring, the first heat exchange ring is fixedly arranged at the first end of the main frame, and the first heat exchange tube ring is arranged on the outer peripheral wall of the first heat exchange ring;

[0015] The second end cooling structure further includes a second heat exchange ring, which is fixed to the second end of the main frame, and the second heat exchange tube is arranged on the outer peripheral wall of the second heat exchange ring.

[0016] As an optional solution for the cooling pipeline system, spiral grooves are provided on the outer peripheral walls of the first heat exchange ring and the second heat exchange ring, and the first heat exchange tube and the second heat exchange tube abut against the corresponding spiral grooves.

[0017] As an optional solution for the cooling pipeline system, spiral grooves are provided on the outer peripheral walls of the first heat exchange ring and the second heat exchange ring, and the first heat exchange tube and the second heat exchange tube abut against the corresponding spiral grooves.

[0018] As an optional solution for the cooling pipeline system, the first end cooling structure further includes a first heat insulation plate, and the first heat insulation plate is arranged between the first end of the main skeleton and the first heat exchange ring;

[0019] The second end cooling structure further includes a second heat insulation plate, and the second heat insulation plate is arranged between the second end of the main skeleton and the second heat exchange ring.

[0020] As an optional solution for the cooling pipeline system, the input unit includes:

[0021] A main input pipe connected to the external cooling system;

[0022] A plurality of shunt pipes are all connected to the outlet of the main input pipe, and the outlet of each shunt pipe is connected to the corresponding coil cooling pipe and the corresponding first circumferential cooling pipe.

[0023] As an optional solution for the cooling pipe system, the circumferential cooling unit also includes a converging cooling pipe and a diverging cooling pipe, the converging cooling pipe is arranged between the outlets of the plurality of first circumferential cooling pipes and the inlets of the first heat exchange pipes; the diverging cooling pipe is arranged between the outlets of the first heat exchange pipes and the inlets of the plurality of second circumferential cooling pipes.

[0024] As an optional solution for the cooling pipe system, the coil cooling pipe is U-shaped.

[0025] As an optional solution of the cooling pipeline system, the cooling pipeline system further includes a magnet dewar, the magnet dewar is surrounded by a vacuum cavity, and the high-temperature superconducting magnet, the input unit, the internal cooling unit, the circumferential cooling unit, the end cooling unit and the output unit are all arranged in the vacuum cavity;

[0026] The magnet dewar is provided with an escape hole for allowing the input unit and the output unit to communicate with the external cooling system.

[0027] Beneficial effects of the present invention:

[0028] The present invention provides a cooling pipeline system for cooling a high-temperature superconducting magnet. The cooling pipeline system includes an input unit, an internal cooling unit, a circumferential cooling unit, an end cooling unit and an output unit. The input unit is configured to be connected to an external cooling system, the internal cooling unit includes a plurality of coil cooling pipes arranged in parallel, each coil cooling pipe is connected to the input unit, and a coil cooling pipe is sandwiched between two adjacent superconducting coils to achieve uniform cooling and cooling inside the high-temperature superconducting magnet. The circumferential cooling unit includes a first circumferential cooling structure and a second circumferential cooling structure arranged in a central symmetrical manner, the first circumferential cooling structure includes a plurality of first circumferential cooling pipes, the second circumferential cooling structure includes a plurality of second circumferential cooling pipes, a fixed cylinder is provided with a plurality of through holes spaced apart along the circumference, each through hole extends along the axial direction of the fixed cylinder, the first circumferential cooling pipe and the second circumferential cooling pipe are penetrated in the corresponding through holes, and each first circumferential cooling pipe is connected to the input unit to uniformly cool and cool the high-temperature superconducting magnet along its circumference. The end cooling unit includes a first end cooling structure and a second end cooling structure respectively arranged at both ends of the high-temperature superconducting magnet, the first end cooling structure includes a first heat exchange tube arranged at the first end of the main frame, the first circumferential cooling tube is connected to the inlet of the first heat exchange tube, and the second circumferential cooling tube is connected to the outlet of the first heat exchange tube. The second end cooling structure includes a second heat exchange tube arranged at the second end of the main frame, and a plurality of second circumferential cooling tubes and a plurality of coil cooling tubes are all connected to the inlet of the second heat exchange tube.

[0029] A portion of the cooling medium entering the input unit from the external cooling system directly enters the multiple coil cooling tubes for internal cooling of the high-temperature superconducting magnet; the other portion enters the multiple first circumferential cooling tubes for circumferential cooling of the high-temperature superconducting magnet. After the cooling medium flows out of the multiple first circumferential cooling tubes, it enters the first heat exchange tube to cool the first end of the high-temperature superconducting magnet, and then flows into the multiple second circumferential cooling tubes through the first heat exchange tube to cool the high-temperature superconducting magnet again along the circumference of the high-temperature superconducting magnet; finally, the cooling medium in the multiple second circumferential cooling tubes and the multiple coil cooling tubes enters the second heat exchange tube to cool the second end of the high-temperature superconducting magnet. The output unit is connected between the outlet of the second heat exchange tube and the external cooling system. The cooling pipeline system can not only uniformly cool the interior of the high-temperature superconducting magnet, but also uniformly cool the circumference and both ends of the high-temperature superconducting magnet, and effectively isolate the high-temperature superconducting magnet from the external temperature zone, effectively reduce the heat leakage of the magnet, provide a stable low-temperature environment for the high-temperature superconducting magnet, and ensure the thermal stability of the high-temperature superconducting magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded view of a high temperature superconducting magnet provided in an embodiment of a specific implementation manner of the present invention;

[0031] Figure 2It is a schematic diagram of the overall structure of a cooling pipeline system and a high-temperature superconducting magnet provided in a specific implementation example of the present invention;

[0032] Figure 3 An exploded diagram of a cooling pipeline system and a high-temperature superconducting magnet provided in an embodiment of the present invention;

[0033] Figure 4 It is an exploded diagram of a cooling pipeline system and a high-temperature superconducting magnet with some structures omitted provided in a specific embodiment of the present invention;

[0034] Figure 5 It is a structural schematic diagram of a high-temperature superconducting magnet and an internal cooling unit (without the cooling plate) provided in a specific embodiment of the present invention;

[0035] Figure 6 It is a schematic diagram of the overall structure of a cooling pipeline system provided by a specific implementation example of the present invention;

[0036] Figure 7 It is a structural schematic diagram of a cooling pipeline system provided by a specific implementation example of the present invention, omitting some structures;

[0037] Figure 8 It is a structural schematic diagram of a magnet Dewar provided in a specific implementation example of the present invention.

[0038] In the figure:

[0039] 100, high temperature superconducting magnet; 101, main frame; 102, superconducting coil assembly; 103, fixing cylinder; 1031, through hole;

[0040] 1. Input unit; 11. Main input pipe; 12. Diverter pipe;

[0041] 2. Internal cooling unit; 21. Coil cooling pipe;

[0042] 3. Circumferential cooling unit;

[0043] 31. first circumferential cooling structure; 311. first circumferential cooling pipe; 312. first flow divider; 313. first flow confluence member;

[0044] 32. Second circumferential cooling structure; 321. Second circumferential cooling pipe; 322. Second flow divider; 323. Second flow confluence member;

[0045] 33. Converging cooling pipe; 34. Diverting cooling pipe; 35. Connecting pipe;

[0046] 4. End cooling unit;

[0047] 41. first end cooling structure; 411. first heat exchange tube; 412. first heat exchange ring; 4121. avoidance groove; 413. first heat insulation plate;

[0048] 42. Second end cooling structure; 421. Second heat exchange tube; 422. Second heat exchange ring; 423. Second heat insulation plate;

[0049] 5. Magnet Dewar; 51. Avoidance hole. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0055] This embodiment provides a cooling pipeline system for cooling a high temperature superconducting magnet 100. Figure 1 As shown, the high temperature superconducting magnet 100 includes a main frame 101, a superconducting coil group 102 and a fixing cylinder 103. The superconducting coil group 102 is arranged on the main frame 101. The superconducting coil group 102 includes a plurality of superconducting coils arranged in parallel. The fixing cylinder 103 is sleeved on the outside of the superconducting coil group 102. Specifically, in this embodiment, a plurality of superconducting coils are symmetrically arranged on both sides of the main frame 101, each superconducting coil is annular, and the sizes of two adjacent superconducting coils are different.

[0056] like Figures 2 to 8 As shown, the cooling pipeline system includes an input unit 1, an internal cooling unit 2, a circumferential cooling unit 3, an end cooling unit 4 and an output unit. The input unit 1 is configured to be connected to an external cooling system, the internal cooling unit 2 includes a plurality of coil cooling pipes 21 arranged in parallel, each coil cooling pipe 21 is connected to the input unit 1, and a coil cooling pipe 21 is sandwiched between two adjacent superconducting coils to achieve uniform cooling inside the high-temperature superconducting magnet 100. The circumferential cooling unit 3 includes a first circumferential cooling structure 31 and a second circumferential cooling structure 32 which are centrally symmetrically arranged. The first circumferential cooling structure 31 includes a plurality of first circumferential cooling tubes 311, and the second circumferential cooling structure 32 includes a plurality of second circumferential cooling tubes 321. The fixed cylinder 103 is provided with a plurality of through holes 1031 spaced apart along the circumference, and each through hole 1031 extends along the axial direction of the fixed cylinder 103. The first circumferential cooling tube 311 and the second circumferential cooling tube 321 are penetrated in the corresponding through holes 1031, and each first circumferential cooling tube 311 is connected to the input unit 1 to uniformly cool the high-temperature superconducting magnet 100 along its circumference. The end cooling unit 4 includes a first end cooling structure 41 and a second end cooling structure 42 respectively arranged at both ends of the high-temperature superconducting magnet 100. The first end cooling structure 41 includes a first heat exchange tube 411 arranged at the first end of the main skeleton 101, the first circumferential cooling tube 311 is connected to the inlet of the first heat exchange tube 411, and the second circumferential cooling tube 321 is connected to the outlet of the first heat exchange tube 411. The second end cooling structure 42 includes a second heat exchange tube 421 arranged at the second end of the main skeleton 101, and a plurality of second circumferential cooling tubes 321 and a plurality of coil cooling tubes 21 are all connected to the inlet of the second heat exchange tube 421.

[0057] A portion of the cooling medium entering the input unit 1 from the external cooling system directly enters the multiple coil cooling tubes 21 for internal cooling of the high-temperature superconducting magnet 100; the other portion enters the multiple first circumferential cooling tubes 311 for circumferential cooling of the high-temperature superconducting magnet 100. After flowing out of the multiple first circumferential cooling tubes 311, the cooling medium enters the first heat exchange tube 411 to cool the first end of the high-temperature superconducting magnet 100, and then flows into the multiple second circumferential cooling tubes 321 through the first heat exchange tube 411 to cool the high-temperature superconducting magnet 100 again along the circumference of the high-temperature superconducting magnet 100; finally, the cooling medium in the multiple second circumferential cooling tubes 321 and the multiple coil cooling tubes 21 enters the second heat exchange tube 421 to cool the second end of the high-temperature superconducting magnet 100. The output unit (not shown) is connected between the outlet of the second heat exchange tube 421 and the external cooling system. The cooling pipeline system can not only uniformly cool the interior of the high-temperature superconducting magnet 100, but also cool the circumference and both ends of the high-temperature superconducting magnet 100, isolating the high-temperature superconducting magnet 100 from the external temperature zone, effectively preventing heat leakage from the magnet, and providing a stable low-temperature environment for the high-temperature superconducting magnet 100.

[0058] Specifically, Figure 4As shown, in this embodiment, the circumferential cooling unit 3 includes two first circumferential cooling structures 31 and two second circumferential cooling structures 32. The two first circumferential cooling structures 31 and the two second circumferential cooling structures 32 are staggered and centrally symmetrically arranged on the outside of the high-temperature superconducting magnet 100. Among them, the first circumferential cooling structure 31 also includes a first diverter 312 and a first confluence piece 313. The first diverter 312 is arranged at the second end of the main skeleton 101. The inlets of multiple first coil cooling tubes 21 and the inlets of multiple first circumferential cooling tubes 311 are all connected to the first diverter 312. Under the diversion effect of the first diverter 312, the cooling medium in the input unit 1 can be delivered to the coil cooling tube 21 and the first circumferential cooling tube 311; the first confluence piece 313 is arranged at the first end of the main skeleton 101. The outlets of multiple first coil cooling tubes 21 are connected to the first confluence piece 313. Under the confluence effect of the first confluence piece 313, the cooling medium in multiple first coil cooling tubes 21 can be simultaneously delivered to the first heat exchange tube 411. The second circumferential cooling structure 32 also includes a second diverter 322 and a second confluence piece 323. The second diverter 322 is arranged at the first end of the main skeleton 101, and the inlets of multiple second circumferential cooling tubes 321 are connected to the second diverter 322. Under the diversion effect of the second diverter 322, the cooling medium in the first heat exchange tube 411 can be diverted to the multiple second circumferential cooling tubes 321; the second confluence piece 323 is arranged at the second end of the main skeleton 101, and the outlets of multiple second circumferential cooling tubes 321 are connected to the second confluence piece 323. Under the confluence effect of the second confluence piece 323, the cooling medium in the multiple second circumferential cooling tubes 321 can be simultaneously delivered to the second heat exchange tube 421.

[0059] Exemplarily, each first circumferential cooling structure 31 includes two first circumferential cooling tubes 311, and each second circumferential cooling structure 32 includes two second circumferential cooling tubes 321, so as to achieve more uniform cooling and cooling of the high-temperature superconducting magnet 100 in the circumference; in other embodiments, the number of the first circumferential cooling tubes 311 and the second circumferential cooling tubes 321 can also be set to three, four or even more, and the specific number can be set as needed and is not specifically limited here.

[0060] In addition, in this embodiment, the first flow dividing member 312 , the first flow converging member 313 , the second flow dividing member 322 , and the second flow converging member 323 are all arranged in a V-shape, which has good structural stability.

[0061] Specifically, continue to refer to Figure 4 A connecting pipe 35 is provided on the side of the second confluence piece 323 away from the main skeleton 101, and the connecting pipe 35 is connected between the second diverter piece 322 and the inlet of the second heat exchange tube 421 to deliver the cooling medium in the multiple second circumferential cooling tubes 321 into the second heat exchange tube 421.

[0062] Alternatively, if Figure 6 As shown, the circumferential cooling unit 3 also includes a converging cooling pipe 33 and a diverting cooling pipe 34. The converging cooling pipe 33 is arranged between the outlets of the plurality of first circumferential cooling pipes 311 and the inlet of the first heat exchange pipe 411, so as to deliver the cooling medium in the plurality of first circumferential cooling pipes 311 into the first heat exchange pipe 411. The diverting cooling pipe 34 is arranged between the outlet of the first heat exchange pipe 411 and the inlet of the plurality of second circumferential cooling pipes 321, so as to divert the cooling medium in the first heat exchange pipe 411 to the plurality of second circumferential cooling pipes 321. Specifically in this embodiment, the converging cooling pipe 33 is arranged between the inlet of the first heat exchange pipe 411 and the first converging piece 313, and the diverting cooling pipe 34 is arranged between the outlet of the first heat exchange pipe 411 and the second diverting piece 322. The above arrangement can ensure that the plurality of second circumferential cooling pipes 321 can simultaneously and uniformly cool and cool the circumference of the high-temperature superconducting magnet, and ensure the uniformity of circumferential cooling and cooling.

[0063] Specifically, in this embodiment, two converging cooling pipes 33 and two diverting cooling pipes 34 are provided, and the two converging cooling pipes 33 are connected to the first converging parts 313 of the two first circumferential cooling structures 31 in a one-to-one correspondence, and the two diverting cooling pipes 34 are connected to the second diverting parts 322 of the two second circumferential cooling structures 32 in a one-to-one correspondence.

[0064] Specifically, the cooling medium may be a medium capable of cooling down, such as cold water, liquid helium or liquid nitrogen. In this embodiment, liquid helium is preferred, as it has the advantages of low surface tension, high thermal conductivity, low viscosity, and stable chemical properties.

[0065] Optionally, continue to refer to Figure 6 The coil cooling tube 21 is U-shaped. The above arrangement can be more compatible with the annular superconducting coil, and the U-shaped coil cooling tube 21 is reliable in operation and low in cost.

[0066] Alternatively, if Figure 7 As shown, the input unit 1 includes a main input pipe 11 and a plurality of shunt pipes 12. The main input pipe 11 is connected to the external cooling system. The plurality of shunt pipes 12 are all connected to the outlet of the main input pipe 11. The inlet of each shunt pipe 12 is connected to the corresponding coil cooling pipe 21 and the corresponding first circumferential cooling pipe 311. Specifically in this embodiment, each shunt pipe 12 is connected to the corresponding first shunt member 312. Under the shunt effect of the first shunt member 312, the cooling medium can be sent into the corresponding coil cooling pipe 21 and the first circumferential cooling pipe 311.

[0067] Optionally, the internal cooling unit 2 further includes a plurality of cold conduction plates (not shown in the figure), each of which is in contact between two adjacent superconducting coils, and each of which is provided with a fixed groove, and a plurality of coil cooling tubes 21 are embedded in the plurality of fixed grooves in a one-to-one correspondence. The coldness of the coil cooling tube 21 is transferred to the cold conduction plate, and then transferred to the superconducting coil via the cold conduction plate, which can effectively increase the heat exchange area and improve the uniform cooling of the interior of the high-temperature superconducting magnet 100.

[0068] Alternatively, if Figure 3 and Figure 4 As shown, the first end cooling structure 41 also includes a first heat exchange ring 412, which is fixed at the first end of the main skeleton 101, and the first heat exchange tube 411 is arranged on the outer peripheral wall of the first heat exchange ring 412; the second end cooling structure 42 also includes a second heat exchange ring 422, which is fixed at the second end of the main skeleton 101, and the second heat exchange tube 421 is arranged on the outer peripheral wall of the second heat exchange ring 422. The arrangement of the first heat exchange ring 412 and the second heat exchange ring 422 can increase the heat exchange area of ​​the first heat exchange tube 411 and the second heat exchange tube 421, and effectively improve the isolation effect between the two ends of the high-temperature superconducting magnet 100 and the external temperature zone.

[0069] Further, continue to refer to Figure 3 and Figure 4 The outer circumferential walls of the first heat exchange ring 412 and the second heat exchange ring 422 are both provided with spiral grooves, and the first heat exchange tube 411 and the second heat exchange tube 421 are in contact with the corresponding spiral grooves. The provision of the spiral grooves can increase the contact area between the first heat exchange ring 412 and the first heat exchange tube 411, and the contact area between the second heat exchange ring 422 and the second heat exchange tube 421, thereby improving the cooling effect at both ends of the high-temperature superconducting magnet 100.

[0070] Specifically, since the cooling medium flow rate in the first heat exchange tube 411 is smaller than the cooling medium flow rate in the second heat exchange tube 421, the inner diameter of the first heat exchange tube 411 is also smaller than the inner diameter of the second heat exchange tube 421. Accordingly, the size of the spiral groove on the first heat exchange ring 412 is also smaller than the size of the spiral groove on the second heat exchange ring 422.

[0071] Optionally, a plurality of avoidance grooves 4121 are provided at both ends of the first heat exchange ring 412 and the second heat exchange ring 422, and the avoidance grooves 4121 are used to allow the first heat exchange tube 411 and the second heat exchange tube 421 to pass through. The arrangement of the avoidance grooves 4121 can facilitate the connection between the inlet of the first heat exchange tube 411 and the confluence cooling tube 33, the connection between the outlet of the first heat exchange tube 411 and the diversion cooling tube 34, and the connection between the second heat exchange tube 421 and the connecting tube 35.

[0072] Alternatively, if Figure 3As shown, the first end cooling structure 41 further includes a first heat insulation plate 413, which is disposed between the first end of the main frame 101 and the first heat exchange ring 412; the second end cooling structure 42 further includes a second heat insulation plate 423, which is disposed between the second end of the main frame 101 and the second heat exchange ring 422. The arrangement of the first heat insulation plate 413 and the second heat insulation plate 423 can further enhance the isolation effect between the high temperature superconducting magnet 100 and the external temperature zone, and provide a stable low temperature environment for the high temperature superconducting magnet 100.

[0073] Specifically, the first heat exchange ring 412 is detachably mounted on the first heat insulation plate 413 by bolts, and the second heat exchange ring 422 is also detachably mounted on the second heat insulation plate 423 by bolts. In addition, the first heat insulation plate 413 and the second heat insulation plate 423 are connected to the first end and the second end of the main frame 101 one by one.

[0074] Illustratively, in this embodiment, the first insulation plate 413 and the second insulation plate 423 are both circular; in other embodiments, the first insulation plate 413 and the second insulation plate 423 may also be other shapes, which are not specifically limited here.

[0075] Optionally, the cooling pipeline system further comprises a magnet dewar 5. Figure 8 As shown, the magnet dewar 5 is surrounded by a vacuum cavity, and the high-temperature superconducting magnet 100, the input unit 1, the internal cooling unit 2, the circumferential cooling unit 3, the end cooling unit 4 and the output unit are all arranged in the vacuum cavity to further isolate the high-temperature superconducting magnet from the external temperature zone, further reduce the radiation heat leakage of the magnet, and help maintain a stable and balanced low-temperature environment. The magnet dewar 5 is provided with an avoidance hole 51 that allows the input unit 1 and the output unit to be connected to the external cooling system, which is convenient for the circulation of the cooling medium.

[0076] Specifically, the magnet dewar 5 is a structure that has been disclosed in the prior art. The specific structure and principle refer to the prior art and will not be repeated here.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cooling pipeline system for cooling a high-temperature superconducting magnet (100), the high-temperature superconducting magnet (100) comprising a main frame (101), a superconducting coil group (102) and a fixing cylinder (103), the superconducting coil group (102) being arranged on the main frame (101), the superconducting coil group (102) comprising a plurality of superconducting coils arranged in parallel, and the fixing cylinder (103) being sleeved on the outside of the superconducting coil group (102); It is characterized in that The cooling pipeline system comprises: An input unit (1) is configured to be connected to an external cooling system; An internal cooling unit (2) comprising a plurality of coil cooling tubes (21) arranged in parallel, each of the coil cooling tubes (21) being connected to the input unit (1), and one of the coil cooling tubes (21) being sandwiched between two adjacent superconducting coils; A circumferential cooling unit (3), comprising a first circumferential cooling structure (31) and a second circumferential cooling structure (32) which are centrally symmetrically arranged, wherein the first circumferential cooling structure (31) comprises a plurality of first circumferential cooling tubes (311), and the second circumferential cooling structure (32) comprises a plurality of second circumferential cooling tubes (321), the fixed cylinder (103) is provided with a plurality of through holes (1031) spaced apart along the circumference, each of the through holes (1031) extending along the axial direction of the fixed cylinder (103), and the first circumferential cooling tube (311) and the second circumferential cooling tube (321) are passed through corresponding through holes (1031); and each of the first circumferential cooling tubes (311) is connected to the input unit (1); An end cooling unit (4) comprises a first end cooling structure (41) and a second end cooling structure (42) respectively arranged at two ends of the high-temperature superconducting magnet (100); the first end cooling structure (41) comprises a first heat exchange tube (411) arranged at the first end of the main skeleton (101), the first circumferential cooling tube (311) is connected to the inlet of the first heat exchange tube (411), and the second circumferential cooling tube (321) is connected to the outlet of the first heat exchange tube (411); the second end cooling structure (42) comprises a second heat exchange tube (421) arranged at the second end of the main skeleton (101), and a plurality of the second circumferential cooling tubes (321) and a plurality of the coil cooling tubes (21) are all connected to the inlet of the second heat exchange tube (421); An output unit is connected between the outlet of the second heat exchange tube (421) and the external cooling system.

2. The cooling pipeline system according to claim 1, characterized in that: The internal cooling unit (2) further comprises a plurality of cooling plates, each of which is in contact with two adjacent superconducting coils, and each of which is provided with a fixing groove, wherein the plurality of coil cooling tubes (21) are embedded in the plurality of fixing grooves in a one-to-one correspondence.

3. The cooling pipeline system according to claim 1, characterized in that: The first end cooling structure (41) further comprises a first heat exchange ring (412), wherein the first heat exchange ring (412) is fixedly arranged at the first end of the main frame (101), and the first heat exchange tube (411) is arranged on the outer peripheral wall of the first heat exchange ring (412); The second end cooling structure (42) further comprises a second heat exchange ring (422), wherein the second heat exchange ring (422) is fixedly mounted on the second end of the main frame (101), and the second heat exchange tube (421) is arranged on the outer peripheral wall of the second heat exchange ring (422).

4. The cooling pipeline system according to claim 3, characterized in that: Spiral grooves are provided on the outer peripheral walls of the first heat exchange ring (412) and the second heat exchange ring (422), and the first heat exchange tube (411) and the second heat exchange tube (421) are abutted against the corresponding spiral grooves.

5. The cooling pipeline system according to claim 3, characterized in that: A plurality of avoidance grooves (4121) are provided at both ends of the first heat exchange ring (412) and the second heat exchange ring (422), and the avoidance grooves (4121) are used to allow the first heat exchange tube (411) and the second heat exchange tube (421) to pass through.

6. The cooling pipeline system according to claim 3, characterized in that: The first end cooling structure (41) further comprises a first heat insulation plate (413), wherein the first heat insulation plate (413) is arranged between the first end of the main frame (101) and the first heat exchange ring (412); The second end cooling structure (42) further comprises a second heat insulating plate (423), and the second heat insulating plate (423) is arranged between the second end of the main frame (101) and the second heat exchange ring (422).

7. The cooling pipeline system according to any one of claims 1 to 6, characterized in that: The input unit (1) comprises: A main input pipe (11) connected to the external cooling system; A plurality of shunt pipes (12) are all connected to the outlet of the main input pipe (11), and the outlet of each shunt pipe (12) is connected to the corresponding coil cooling pipe (21) and the corresponding first circumferential cooling pipe (311).

8. The cooling pipeline system according to any one of claims 1 to 6, characterized in that: The circumferential cooling unit (3) further comprises a converging cooling pipe (33) and a diverging cooling pipe (34); the converging cooling pipe (33) is arranged between the outlets of the plurality of first circumferential cooling pipes (311) and the inlet of the first heat exchange pipe (411); and the diverging cooling pipe (34) is arranged between the outlet of the first heat exchange pipe (411) and the inlet of the plurality of second circumferential cooling pipes (321).

9. The cooling pipeline system according to any one of claims 1 to 6, characterized in that: The coil cooling pipe (21) is U-shaped.

10. The cooling pipeline system according to any one of claims 1 to 6, characterized in that: The cooling pipeline system further comprises a magnet dewar (5), wherein the magnet dewar (5) is surrounded by a vacuum cavity, and the high-temperature superconducting magnet (100), the input unit (1), the internal cooling unit (2), the circumferential cooling unit (3), the end cooling unit (4) and the output unit are all arranged in the vacuum cavity; The magnet dewar (5) is provided with an escape hole (51) that allows the input unit (1) and the output unit to communicate with the external cooling system.

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