Multi-channel parallel forced flow cooling loop of superconducting energy storage magnet solenoid coil

Abstract

The invention provides a multichannel parallel forced flow cooling loop of a superconducting energy storage magnet solenoid coil, which belongs to the technical field of superconducting magnets and comprises a double-layer vacuum helium input pipe, a cooling pipeline inlet assembly, a solenoid coil assembly, a cooling pipeline outlet assembly and a double-layer vacuum helium output pipe. The double-layer vacuum helium input pipe and the double-layer vacuum helium output pipe are used for conveying low-temperature helium to the superconducting energy storage magnet part and outputting the helium after cooling is finished; the cooling pipeline inlet assembly provides helium input for the superconducting energy storage magnet; the solenoid coil assembly balances the inlet and outlet pressure and flow velocity of helium; the cooling pipeline outlet assembly outputs helium after cooling of the superconducting magnet is finished, the helium is sent back to the double-vacuum helium output pipe, and circulation of the superconducting magnet cooling medium is formed. According to the invention, the low-temperature environment when the superconducting coil normally works can be ensured, the good cooling capability of the superconducting energy storage magnet is realized, and the operation parameters of the cooling medium are controlled according to the specific working condition and the actual requirement.

Description

Technical Field

[0001] The invention relates to the field of superconducting magnet cryogenic systems, and in particular to a multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil. Background Art

[0002] Superconducting magnets made of superconducting materials have stronger current carrying capacity, lower transmission loss, compact structure, large capacity and low working noise. Due to the zero impedance characteristics of the superconductor itself, the Joule loss generated is almost negligible when the critical temperature of the material is not reached. It can carry a large current and has a strong practical value. It is widely used in industry and scientific research, but it must work at low temperatures and has strict requirements on the temperature conditions of the environment.

[0003] The normal operation of superconducting magnets requires strict low temperature conditions. When the ambient temperature is lower than the critical temperature of the superconducting magnet, its zero resistance characteristics can only play a role. There are two common cooling methods. The first is to use a low-temperature cooling medium to directly inject it into the cryogenic container to directly cool the superconducting magnet. The second is to first use other relatively low-cost cryogenic liquids to inject into the cryogenic container, cool the magnet and the cryogenic container to a certain temperature, and then use the cooling medium to replace the previously used cryogenic liquid to cool the superconducting magnet to the required target temperature. However, both of the above methods require a large amount of cooling medium, which is costly and economical, and the device is large in size, which is not convenient for installation and maintenance.

[0004] The cryogenic cooling device is an important part of the superconducting magnet coil system. It not only provides the required low temperature environment for the normal operation of the superconducting magnet coil, but also can further improve the critical characteristics of the superconducting magnet coil and ensure the stable operation of the superconducting magnet coil in the superconducting state. The reliability and stability of the current cooling device is an important issue. The design of the cooling loop needs to consider factors such as flow resistance, heat exchange efficiency and pressure loss. The design and operation of the superconductor cryogenic cooling loop requires precise control and strict safety measures, because superconducting materials are very sensitive to temperature and temperature fluctuations may affect their superconducting properties. Summary of the invention

[0005] To solve the above technical problems, the present invention provides a multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil, which provides the required low temperature environment for the normal operation of the superconducting magnet coil. The cooling circuit uses a solenoid tube structure to achieve concentric tube cooling of the superconducting magnet coil.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A multi-channel parallel forced flow cooling circuit for a solenoid coil of a superconducting energy storage magnet comprises a double-layer vacuum helium input pipe, a cooling pipeline inlet component, a solenoid coil component, a cooling pipeline outlet component and a double-layer vacuum helium output pipe; the double-layer vacuum helium input pipe and the double-layer vacuum helium output pipe transport low-temperature helium to the superconducting energy storage magnet part and output the helium after cooling; the cooling pipeline inlet component provides helium input for the superconducting energy storage magnet, and balances the pressure of the cooling helium inlet flow by using a multi-channel inlet branch pipe; the solenoid coil component adopts a concentric pipeline design and is connected to the inside of the solenoid superconducting coil. The concentric circle design enables the flow direction of the helium entering the cooling device to be perpendicular to the solenoid cross section and the same as the direction along the superconducting magnet pipeline, thereby balancing the pressure and flow rate of the helium in and out; the cooling pipeline outlet component outputs the helium after the superconducting magnet is cooled, and sends the helium back to the double vacuum helium output pipe to form a circulation of the superconducting magnet cooling medium.

[0008] Furthermore, the double-layer vacuum helium input pipe is the inlet of the cooling medium, and the double-layer vacuum helium output pipe is the outlet of the cooling medium. The main components of the double-layer vacuum helium input pipe and the double-layer vacuum helium output pipe include a Dewar connecting pipeline, an internal helium tube channel, a helium sealing flange and a long-distance helium forced flow tube. The internal helium tube channel adopts a thin-walled and long-distance structural design, which can reduce heat loss during conduction.

[0009] Furthermore, a sealing flange is used for welding between the internal helium tube channel and the external Dewar connecting pipeline, and the flange is sealed with polytetrafluoroethylene, which can improve the sealing performance and effectively prevent the leakage of helium during the flow process.

[0010] Furthermore, the internal helium tube channel and the external Dewar connecting pipeline form a double-layer vacuum pipeline, which effectively improves the heat insulation capacity of the pipeline and prevents the air on the outer surface of the double-layer vacuum helium input tube from being cooled and liquefied into water.

[0011] Furthermore, the main helium forced flow inlet pipe is connected to the multi-channel inlet branch pipe, which is composed of eight single-channel inlet branches, and jointly transports the cooling medium into the superconducting energy storage magnet. The multi-channel inlet branch pipe balances the pressure of the inlet flow of helium required by the multiple independent coils of the superconducting magnet, and can also adjust the mass flow, direction and temperature of the helium required by a single coil as required, reducing the flow resistance caused by the change in diameter during the flow of helium. After the coil is fully cooled, the cooling medium is output to the superconducting energy storage magnet through the multi-channel outlet branch pipe.

[0012] Furthermore, the multi-channel outlet branch pipes include eight single-channel outlet branch pipes, which are divided into two groups, one group includes five single-channel outlet branch pipes, which are merged into one main helium forced flow outlet pipe, and the other group includes three single-channel outlet branch pipes, which are merged into another main helium forced flow outlet pipe. Using multi-channel inlet branch pipes and multi-channel outlet branch pipes to cool the superconducting magnet can effectively reduce the operating temperature of the superconducting energy storage magnet and realize high-quality and stable transportation of the cooling medium.

[0013] Furthermore, the eight single-channel inlet branches and the eight single-channel outlet branches are divided into two sections, each of which is equipped with an electric insulator for connecting the disconnection of the pipeline. According to the different insulating materials used, the electric insulators can be divided into porcelain insulators, glass insulators and composite insulators (also called synthetic insulators). Porcelain insulators are preferably used, which not only play an insulating role, but also can withstand voltage and mechanical stress. At the same time, the porcelain insulators used have strong anti-aging ability, high pollution resistance, are not easy to break, have no zero-value insulators, have low loss, and have high operational reliability. They have the advantages of small size, light weight, and convenient transportation, installation and maintenance.

[0014] Furthermore, the superconducting magnet structure and its cooling pipeline use a solenoid coil assembly, and the overall solenoid circuit is composed of a superconducting magnet coil, a cooling pipeline and a structural support system, wherein the superconducting magnet coil is arranged in a solenoid form, which has the advantages of high field strength, low loss, good stability, etc. The cooling pipeline is arranged in a solenoid form, which can fully cool the superconducting magnet coil. The structural support system is used to support the superconducting magnet coil and fixed equipment.

[0015] Furthermore, the superconducting magnet structure and its cooling pipeline use a solenoid coil assembly, and a single superconducting magnet coil and a single cooling branch use a solenoid design to ensure that the direction of the cooling medium is the same as the direction of the superconducting magnet pipeline, so that the flow direction of the cooling medium is consistent with the direction along the pipeline, reducing the speed change and pressure difference of the inlet and outlet cooling medium. The superconducting magnet structure and its cooling pipeline use a solenoid structure to save space, and simultaneously perform separate cooling of the superconducting magnet coil and parallel cooling between windings, with a stable structure, high cooling efficiency, and good economic benefits.

[0016] Furthermore, a cryogenic valve is installed at the connection between the single single-channel outlet branch pipe and the main helium forced flow outlet pipe. The cryogenic valve is a valve that works in a cryogenic medium, and most of its working medium is flammable, explosive, and highly permeable substances. The cryogenic valve of the present invention has the function of controlling flow and flow direction and preventing leakage, and can adjust the mass flow of the cooling medium according to actual requirements and operating conditions; when the cooling medium flows through the branch pipe and the main pipe, it will generate pressure on the cooling circuit due to the change in pipe diameter, and the cryogenic valve plays a regulating role to reduce the impact of pipeline diversion and diameter change. At the same time, the cryogenic valve has good insulation performance, cooling performance and sealing effect, which improves the stability and safety of a single pipeline when the temperature changes.

[0017] Furthermore, the multi-channel inlet branch pipe, the main helium forced flow inlet main pipe, the multi-channel outlet branch pipe and the main helium forced flow outlet main pipe all adopt a long-distance structural design with excellent insulation performance, which can avoid or reduce low-temperature liquefaction and freezing on the outer surface of the pipeline.

[0018] The beneficial effects of the present invention are as follows:

[0019] The superconducting magnet structure and its cooling pipeline of the present invention use a solenoid pipeline structure to ensure that the superconducting magnet is fully cooled during operation, and have the advantages of compact structure, energy saving and consumption reduction, convenient maintenance, simple installation, space saving, and saving cooling medium, so that the superconducting magnet can achieve its characteristics of large capacity, high current carrying capacity, high efficiency, and low resistance loss, and improve its stability margin and operational reliability during operation. The method of using a multi-channel inlet branch pipe and a cryogenic valve to control the outlet branch pipe solves the problem of controlling parameters such as flow rate and pressure during the flow of the cooling medium. The present invention not only simplifies the structure of the cooling pipeline, but also has high cooling efficiency and saves cooling medium, and can also adjust the operating parameters of the low-temperature cooling circuit, such as pressure, temperature, flow, etc., according to needs, to ensure that the superconducting coil is always in a stable low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a multi-channel parallel forced flow cooling circuit of a superconducting energy storage magnet solenoid coil according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a double-layer vacuum helium input tube and a double-layer vacuum helium output tube according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a cooling pipeline inlet assembly according to an embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a solenoid coil assembly according to an embodiment of the present invention;

[0024] Figure 5Schematic diagram of the cooling pipe outlet assembly structure according to an embodiment of the present invention.

[0025] Among them, the accompanying drawings are marked as: double-layer vacuum helium input pipe 1, cooling pipeline inlet assembly 2, solenoid coil assembly 3, cooling pipeline outlet assembly 4, double-layer vacuum helium output pipe 5, external Dewar connecting pipeline 11, internal helium tube channel 12, helium sealing flange 13, long-distance helium forced flow pipe 14, main helium forced flow inlet pipe 21, multi-channel inlet branch pipe 22, first electric insulator 23, inlet superconducting joint 31, solenoid superconducting coil 32, outlet superconducting joint 41, second electric insulator 42, cryogenic valve 43, multi-channel outlet branch pipe 44, main helium forced flow outlet pipe 45. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 As shown, a multi-channel parallel forced flow cooling circuit of a superconducting energy storage magnet solenoid coil according to an embodiment of the present invention includes a double-layer vacuum helium input pipe 1, a cooling pipeline inlet assembly 2, a solenoid coil assembly 3, a cooling pipeline outlet assembly 4, and a double-layer vacuum helium output pipe 5. The double-layer vacuum helium input pipe 1 is connected to the cooling pipeline inlet assembly 2 to supply cooling helium to the cooling circuit. The cooling pipeline inlet assembly 2 is further connected to the solenoid coil assembly 3, and the helium introduced from the double-layer vacuum helium input pipe 1 is sent into the solenoid coil assembly 3 for cooling. The cooled helium flows out from the solenoid coil assembly 3, gathers at the cooling pipeline outlet assembly 4, and is finally discharged from the cooling circuit through the double-layer vacuum helium output pipe 5.

[0028] like Figure 2 As shown, the double-layer vacuum helium input pipe 1 and the double-layer vacuum helium output pipe 5 both include an external Dewar connecting pipe 11, an internal helium pipe channel 12, a helium sealing flange 13 and a long-distance helium forced flow pipe 14. The external Dewar connecting pipe 11 is welded on the outer plate of the Dewar, and the external Dewar connecting pipe 11 and the internal helium pipe channel 12 are welded using a helium sealing flange 13 to form a double-layer vacuum pipeline. Such a structure has a good insulation function. In order to ensure that there is no leakage during the flow of helium, the long-distance helium forced flow pipe 14 is connected to the internal helium pipe channel 12 through the helium sealing flange 13. The helium sealing flange 13 is connected using polytetrafluoroethylene sealing, and the helium is stably input into the cooling pipeline inlet component 2 through the long-distance helium forced flow pipe 14, and is output to the cooling pipeline outlet component 4 after cooling.

[0029] like Figure 3 As shown, the cooling pipeline inlet assembly 2 includes a main helium forced flow inlet pipe 21, a multi-channel inlet branch pipe 22, and a first electric insulator 23. The main helium forced flow inlet pipe 21 is connected to the long-distance helium forced flow pipe 14, and is used to input helium into the superconducting energy storage magnet at the beginning of cooling. The main helium forced flow inlet pipe 21 is connected to the multi-channel inlet branch pipe 22. Preferably, the multi-channel inlet branch pipe 22 includes eight single-channel inlet branches, and a single single-channel inlet branch pipe is divided into two sections, which are connected by the first electric insulator 23 and connected to the solenoid type superconducting coil 32 inside the superconducting energy storage magnet through the inlet superconducting joint 31; the two ends of the first electric insulator 23 are respectively connected to the two sections of the single-channel inlet branch pipes, which play the role of insulation and bearing mechanical stress, and prevent the generation of current in the cooling pipeline inlet assembly 2, the solenoid coil assembly 3 and the cooling pipeline outlet assembly 4.

[0030] like Figure 4 As shown, the solenoid coil assembly 3 includes an inlet superconducting joint 31 and a solenoid superconducting coil 32; a single-channel inlet branch of the multi-channel inlet branch 22 is connected to the solenoid superconducting coil 32 inside the superconducting energy storage magnet through the inlet superconducting joint 31, and the single-channel inlet branch is extended to form a cooling pipeline specifically used for cooling the solenoid superconducting coil 32. The solenoid superconducting coil 32 and its cooling pipeline adopt a concentric pipeline design, which maximizes the cooling effect.

[0031] like Figure 5 As shown, the cooling pipeline outlet assembly 4 includes an outlet superconducting joint 41, a second electrical insulator 42, a cryogenic valve 43, a multi-channel outlet branch pipe 44, and a main helium forced flow outlet pipe 45. The multi-channel outlet branch pipe 44 passes through the outlet superconducting joint 41 to output the helium to the superconducting energy storage magnet. The multi-channel outlet branch pipe 44 includes eight single-channel outlet branches, five of which are installed on the outside of the superconducting magnet and connected to a main helium forced flow outlet pipe 45, and the remaining three single-channel outlet branches are installed on the other side of the superconducting magnet and connected to the second main helium forced flow outlet pipe 45. A cryogenic valve 43 is installed at the connection between a single single-channel outlet branch pipe and the main helium forced flow outlet pipe 45, and the cryogenic valve 43 plays the role of controlling the flow rate and flow direction, adjusting the pipeline pressure and preventing helium leakage. There are two main helium forced flow outlet pipes 45, and the segment of each main helium forced flow outlet pipe is connected by a second electrical insulator 42. Each branch of the eight single-channel outlet branches is divided into two sections, each of which is equipped with an electrical insulator to connect the disconnection of the pipeline. The two ends of the electrical insulator are connected to the segment of the single-channel outlet branch or the main helium forced flow outlet pipe of the main line, which plays the role of insulation and bearing mechanical stress to prevent current from being generated in the cooling pipeline.

[0032] Preferably, the single-channel inlet branch of the multi-channel inlet branch 22 is extended in the solenoid coil assembly 3 to form a cooling pipeline specifically used for cooling the solenoid superconducting coil 32. The solenoid superconducting coil 32 and its cooling pipeline are both arranged in a solenoid concentric structure. The cooling medium enters the cooling pipeline to cool the superconducting energy storage magnet. The solenoid concentric structure causes the solenoid superconducting coil 32 and the cooling medium to have the same direction.

[0033] Preferably, the two main helium forced flow outlet pipes 45 are respectively connected to two groups of single-channel outlet branch pipes, and the cooling medium converges at the position where the main helium forced flow outlet pipes 45 are connected to the single-channel outlet branch pipes.

[0034] Preferably, the inlet superconducting joint 31 is connected to the single-channel inlet branch of the superconducting energy storage magnet. There are eight single-channel inlet branches and four inlet superconducting joints 31. One inlet superconducting joint 31 connects two single-channel inlet branches, so that the two single-channel inlet branches enter the interior of the superconducting energy storage magnet through one inlet superconducting joint.

[0035] Preferably, the outlet superconducting joint 41 is connected to the single-channel outlet branch pipe. There are five outlet superconducting joints 41 in total, which are divided into two groups. The first group includes three outlet superconducting joints 41, which are installed in the part corresponding to the side including the five single-channel outlet branches, wherein two outlet superconducting joints 41 are connected to two single-channel outlet branches respectively, and the third outlet superconducting joint 41 is connected to the remaining single-channel outlet branch pipe; the second group includes two outlet superconducting joints 41, which are installed in the part corresponding to the side including the three single-channel outlet branches, wherein one outlet superconducting joint 41 is connected to two single-channel outlet branches, and the other outlet superconducting joint 41 is connected to the remaining single-channel outlet branch pipe.

[0036] Preferably, the electrical insulator is a porcelain insulator, the surface of which is covered with porcelain enamel and has high mechanical strength. At the segmented part of the connecting branch pipe, it ensures the normal transportation of the cooling medium in the pipeline while playing the role of insulation and bearing mechanical stress, preventing the generation of current in the cooling circuit due to the operation of the superconducting magnet.

[0037] Preferably, the cryogenic valve 43 is installed at the connection between the single single-channel outlet branch and the main helium forced flow outlet pipe 45 of the main circuit. The connection between the cryogenic valve 43 and the pipeline is a welding structure, which can avoid low-temperature leakage. The cryogenic valve 43 is used to control the flow direction of the cooling medium according to the operation requirements; when the cooling medium converges to the main helium forced flow outlet pipe 45 of the main circuit in the single single-channel outlet branch, it will generate pressure on the pipeline. Adjusting the cryogenic valve 43 can reduce the pressure of the confluence variable diameter. The valve has a self-pressure relief structure in the middle cavity. When the pressure in the inner cavity of the valve is abnormal, it can be automatically discharged.

[0038] In this embodiment, when in use, the cooling medium generated by the refrigeration host passes through the double-layer vacuum helium input pipe 1, is input into the main helium forced flow inlet pipe 21 through the long-distance helium forced flow pipe 14, and is branched into the interior of the superconducting magnet through the multi-channel inlet branch pipe 22, thereby cooling the superconducting magnet as a whole. The cooling medium then flows out through the multi-channel outlet branch pipe 44, thereby entering the two main helium forced flow outlet pipes 45, and then the cooling medium is output to the double-layer vacuum helium output pipe 5 and returns to the refrigeration host to form a cycle.

[0039] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 present invention.

Claims

1. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil, characterized in that: The invention comprises a double-layer vacuum helium input pipe (1), a cooling pipeline inlet assembly (2), a solenoid coil assembly (3), a cooling pipeline outlet assembly (4), and a double-layer vacuum helium output pipe (5); the double-layer vacuum helium input pipe (1) comprises a long-distance helium forced flow pipe (14); the cooling pipeline inlet assembly (2) comprises a main helium forced flow inlet pipe (21) and a multi-channel inlet branch pipe (22); the main helium forced flow inlet pipe (21) is connected to the long-distance helium forced flow pipe (14) and is used to input helium into the superconducting energy storage magnet at the beginning of cooling; the main helium forced flow inlet pipe (21) is connected to the multi-channel inlet branch pipe (22); the cooling pipeline outlet assembly (4) comprises a multi-channel outlet branch pipe (44) and a main helium forced flow outlet pipe (45); the cooling medium generated by the refrigeration host is input into the cooling pipeline inlet assembly (2) to cool the solenoid coil assembly (3) as a whole; the cooling medium is then output through a single-channel outlet branch pipe of the multi-channel outlet branch pipe (44) and finally merges and flows into the two outlet pipes.

2. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 1, characterized in that: The double-layer vacuum helium input pipe (1) and the double-layer vacuum helium output pipe (5) both comprise an external Dewar connecting pipe (11), an internal helium pipe channel (12), a helium sealing flange (13) and a long-distance helium forced flow pipe (14); the external Dewar connecting pipe (11) is welded to the Dewar outer plate, and the external Dewar connecting pipe (11) and the internal helium pipe channel (12) are welded using the helium sealing flange (13) to form a double-layer vacuum pipe.

3. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 2, characterized in that: The helium sealing flange (13) is sealed with polytetrafluoroethylene, and helium is stably input and output through a long-distance helium forced flow tube (14).

4. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 1, characterized in that: The solenoid coil assembly (3) comprises an inlet superconducting joint (31) and a solenoid-type superconducting coil (32); the multi-channel inlet branch pipe (22) passes through the inlet superconducting joint (31) and enters the internal superconducting energy storage magnet, and the solenoid-type superconducting coil (32) and its cooling pipeline adopt a concentric pipeline design.

5. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 4, characterized in that: The cooling pipeline inlet assembly (2) further comprises a first electric insulator (23); the multi-channel inlet branch pipe (22) comprises eight single-channel inlet branch pipes, each single-channel inlet branch pipe being divided into two sections, connected by the first electric insulator (23), and connected to the solenoid pipe inside the superconducting magnet through an inlet superconducting joint (31); two ends of the first electric insulator (23) are respectively connected to two sections of the single-channel inlet branch pipe.

6. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 1, characterized in that: The cooling pipeline outlet assembly (4) further comprises an outlet superconducting joint (41), a second electric insulator (42), and a cryogenic valve (43); the multi-channel outlet branch pipe (44) passes through the outlet superconducting joint (41) to output the helium gas to the superconducting energy storage magnet.

7. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 6, characterized in that: The multi-channel outlet branch pipe (44) includes eight single-channel outlet branch pipes, and a cryogenic valve (43) is installed at the connection between each single-channel outlet branch pipe and the main helium forced flow outlet main pipe (45).

8. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 7, characterized in that: There are two main helium forced flow outlet pipes (45) in total. The two main helium forced flow outlet pipes (45) are connected via a second electrical insulator (42) on the pipe. The pipe is further connected to a long-distance helium forced flow pipe (14) of a double-layer vacuum helium output pipe (5) to output the cooling medium.

9. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 7, characterized in that: The single branch pipes of the eight single-channel outlet branch pipes are divided into two sections, each of which is equipped with an electrical insulator for connecting the disconnection of the pipeline.

10. A multi-channel parallel forced flow cooling circuit for a superconducting energy storage magnet solenoid coil as claimed in claim 7, characterized in that: Five of the eight single-channel outlet branch pipes are installed on one side outside the superconducting magnet and connected to a main helium forced flow outlet main pipe (45), and the remaining three single-channel outlet branch pipes are installed on the other side outside the superconducting magnet and connected to a second main helium forced flow outlet main pipe (45).

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