Supporting device of superconducting magnet, superconducting magnet assembly and star simulator

Abstract

The utility model discloses a supporting device of a superconducting magnet, a superconducting magnet assembly and a star imitator, the supporting device comprises a first supporting part, a thermal cut-off part and a second supporting part which are sequentially connected along a first direction, and the thermal cut-off part is arranged between the first supporting part and the second supporting part; a cooling flow channel used for transmitting a cooling medium is formed in the heat cut-off part, the temperature of the heat cut-off part is actively reduced through the internal cooling flow channel by circulating the cooling medium, heat conduction from the installation face to the superconducting magnet is reduced, and therefore the first supporting part and the second supporting part can be arranged to be of a structure with good rigidity; therefore, the supporting stability of the superconducting magnet can be met, the advantages of good supporting stability and low thermal conductivity can be considered, and the stability of the star imitator working for a long time can be improved when the superconducting magnet is applied to the star imitator.

Description

Technical Field

[0001] This utility model relates to the field of superconducting magnet technology, and in particular to a support device for a superconducting magnet, a superconducting magnet assembly, and a stellarator. Background Technology

[0002] Superconducting magnets, as core devices for achieving strong magnetic fields, play a crucial role in science and engineering, and are widely used in many key areas such as magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), particle accelerators, and controlled nuclear fusion devices. Superconducting coils require extremely low temperatures (such as the liquid helium temperature range of 4.2K or 4.5K) to maintain their superconducting state, so the entire superconducting magnet system is usually housed within a complex cryogenic dewar. However, the mechanical structures used to fix and support the superconducting coils, especially the gravity support legs that bear the main weight, become heat conduction paths connecting the room-temperature dewar shell to the internal extremely low-temperature region. The support components are mostly made of metal or composite materials, and their high thermal conductivity causes a large amount of heat to be continuously conducted from the 300K temperature range to the 4.5K temperature range. This conductive heat leakage places a heavy burden on 4.5K temperature-range refrigeration systems (such as liquid helium volatilization or cryogenic refrigerators), not only keeping operating costs high but also limiting the performance of magnets for long-term stable operation.

[0003] To reduce heat leakage, existing technologies mainly adopt two strategies, but both have obvious drawbacks: (1) Using low thermal conductivity materials to make the support structure. This strategy often conflicts with the mechanical strength required by the structure. Low thermal conductivity materials often cannot meet the requirements of high strength support for large magnets. When supporting large magnets, they may not be able to provide sufficient support force, affecting the stability and safety of the magnets. (2) Designing the support structure as a slender rod to reduce heat leakage by increasing the length of the heat conduction path and reducing the cross-sectional area. However, this design is constrained by the internal space of the Dewar. Excessive slenderness will sacrifice the stiffness and stability of the structure, making the support structure prone to deformation or damage when subjected to gravity or other external forces.

[0004] Therefore, the existing support structure for superconducting magnets has the problem of not being able to balance good support stability and low thermal conductivity. Utility Model Content

[0005] The purpose of this application is to solve the problem that the support structure of superconducting magnets in the prior art cannot achieve both good support stability and low thermal conductivity.

[0006] To achieve the above objectives, this application provides a support device for a superconducting magnet, used to support the superconducting magnet along its gravitational direction. The support device includes a first support component, a heat-stopping component, and a second support component connected sequentially along a first direction, wherein the first direction is parallel to the gravitational direction of the superconducting magnet. Both the first and second support components extend along the first direction. The end of the first support component away from the heat-stopping component is used to connect to the superconducting magnet, and the end of the second support component away from the heat-stopping component is used to be fixedly connected to a mounting surface. A cooling channel for transmitting a cooling medium is formed inside the heat-stopping component. The heat-stopping component has a first connecting surface facing the first support component and a second connecting surface facing the second support component. The first connecting surface is in contact with the corresponding end face of the first support component, and the second connecting surface is in contact with the corresponding end face of the second support component. The heat-stopping component includes a first connecting member, a main body component, and a second connecting member stacked sequentially along the first direction. A first flow channel is formed on the side wall of the first connecting member near the main body component, and a second flow channel is formed on the side wall of the second connecting member near the main body component. The main body component has a connecting hole connecting the first and second flow channels.

[0007] By adopting the above technical solution, the support device provided in this application includes a first support component, a heat-stopping component, and a second support component connected sequentially along a first direction. A heat-stopping component is disposed between the first and second support components, and a cooling channel for transmitting cooling medium is formed inside the heat-stopping component. The heat-stopping component has a first connecting surface facing the first support component and a second connecting surface facing the second support component. The first connecting surface is in contact with the corresponding end face of the first support component, and the second connecting surface is in contact with the corresponding end face of the second support component. Its internal cooling channel actively reduces the temperature of the heat-stopping component through circulating cooling medium, thereby forming a temperature gradient in the support chain and reducing heat conduction from the high-temperature side (mounting surface) to the low-temperature side (superconducting magnet). Thus, the first and second support components can be designed as structures with relatively good rigidity, without needing to be designed with special low thermal conductivity materials, thereby satisfying the support stability of the superconducting magnet. Therefore, the superconducting magnet support device provided in this application has the advantages of balancing good support stability and low thermal conductivity.

[0008] In addition, by setting the heat cut-off component as three stacked components, the first connecting component and the second connecting component form a flow path of cooling medium with the connecting hole of the main component through the first flow channel and the second flow channel formed by their sidewalls, respectively.

[0009] According to the support device for the superconducting magnet provided in this application, the heat cut-off component includes a first connecting member, a main body member, and a second connecting member stacked sequentially along a first direction; wherein, the side of the first connecting member facing away from the main body member forms a first connecting surface, the side of the second connecting member facing away from the main body member forms a second connecting surface, and a first flow channel is formed on the side wall of the first connecting member near the main body member, a second flow channel is formed on the side wall of the second connecting member near the main body member, and the main body member forms a connecting hole connecting the first flow channel and the second flow channel.

[0010] By adopting the above technical solution, the heat-stopping component is configured as three stacked components. The first and second connecting components, through the first and second flow channels formed on their sidewalls, respectively, form a flow path for the cooling medium with the connecting holes of the main component. The first and second connecting components serve as the connection interfaces between the heat-stopping component and the supporting component, and the flow channels they form are close to the main component, allowing the cooling medium to enter along the first flow channel, then penetrate the main component laterally through the connecting holes, and then enter the second flow channel, thereby forming a three-dimensional cooling path inside the heat-stopping component. This layered structure not only simplifies the processing difficulty of complex flow channels through stacked assembly, but also avoids weakening the overall structural strength of the supporting device by distributing the flow channels on the sidewalls of the connecting components rather than inside the main component.

[0011] According to the support device for the superconducting magnet provided in this application, the first connecting member is configured as a first connecting plate, the second connecting member is configured as a second connecting plate, and the main body member is configured as a partition; wherein, the first connecting plate and the second connecting plate are respectively attached to the partition and fixed to each other, and a first connecting port communicating with the first flow channel is formed on the first connecting plate, and a second connecting port communicating with the second flow channel is formed on the second connecting plate, one of the first connecting port and the second connecting port is a cooling medium inlet, and the other is a cooling medium outlet.

[0012] By adopting the above technical solution, the first connecting member and the second connecting member are designed as flat plate structures, which are fixed to the plane of the partition. This ensures that there is a large contact area between the components for cooling, and also ensures the airtightness of the flow channel through the sealing characteristics of the plane contact.

[0013] According to the support device for the superconducting magnet provided in this application, a plurality of first grooves are formed on the side wall of the first connecting plate near the partition and are arranged side by side and interconnected with each other, and a plurality of second grooves are formed on the side wall of the second connecting plate near the partition, which correspond one-to-one with the first grooves and are interconnected with each other; wherein, the plurality of first grooves are sealed and fitted with one side wall of the partition to form a first flow channel, and the plurality of second grooves are sealed and fitted with the other side wall of the partition to form a second flow channel.

[0014] By employing the above technical solution, multiple parallel and interconnected grooves are respectively set on the first and second connecting plates, and sealed and fitted with the partition to form flow channels, achieving efficient distribution and expansion of the cooling flow channels. Multiple first grooves on the first connecting plate are sealed and fitted with one side of the partition to form a first flow channel, and multiple second grooves on the second connecting plate are sealed and fitted with the other side of the partition to form a second flow channel, allowing the cooling medium to be transported through multiple parallel flow channel branches. This multi-groove parallel structure significantly increases the contact area between the cooling medium and the flow channel wall, improving heat exchange efficiency.

[0015] According to the support device for the superconducting magnet provided in this application, a plurality of connecting holes are formed on the partition plate, and the plurality of connecting holes correspond one-to-one with a plurality of first grooves and a plurality of second grooves, and each connecting hole connects the corresponding first groove and second groove.

[0016] By adopting the above technical solution, multiple connecting holes are provided on the partition plate, and the multiple connecting holes correspond one-to-one with the first groove of the first connecting plate and the second groove of the second connecting plate. Each connecting hole is specifically connected to a specific pair of first and second grooves, which not only ensures the directional flow of the cooling medium in the stacked structure, but also avoids cross-flow interference between different flow channels.

[0017] According to the support device for the superconducting magnet provided in this application, the first connection port is connected to at least one of the plurality of first grooves, and the second connection port is connected to at least one of the plurality of second grooves.

[0018] By adopting the above technical solution, by connecting the first connection port and the second connection port to different grooves, multiple grooves can be connected to form a meandering path to extend the residence time of the cooling medium, ensuring that the cooling medium is discharged after completing heat exchange, resulting in better cooling effect.

[0019] According to the support device for the superconducting magnet provided in this application, the first connection port is connected to the outermost of the plurality of first grooves, the second connection port is connected to the outermost of the plurality of second grooves, and the first connection port and the second connection port are offset in the second direction. The plurality of first grooves are arranged side by side in the second direction, and the second direction is perpendicular to the first direction.

[0020] By employing the above technical solution, and setting the cooling medium inlet and outlet in the outermost grooves and staggering them along the second direction, a meandering cooling channel can be formed, extending the flow path and increasing the heat exchange area. Furthermore, the structure of multiple grooves arranged side-by-side along the second direction ensures both the uniformity of the channel distribution and avoids excessively large support components due to excessive channel length. This allows the support device to effectively reduce heat conduction without compromising mechanical strength due to channel complexity.

[0021] According to the support device for the superconducting magnet provided in this application, the first support component is configured as a first support column, and the second support component is configured as a second support column; furthermore, the two ends of the first support column are respectively connected to a first support platform and a second support platform, and the two ends of the second support column are respectively connected to a third support platform and a fourth support platform; wherein, the first support platform is used to connect with the superconducting magnet, the end face of the second support platform is attached to and fixedly connected to the first connecting surface; the end face of the third support platform is attached to and fixedly connected to the second connecting surface, and the end face of the fourth support platform is fixedly connected to the mounting surface; the cooling medium includes liquid nitrogen or pressurized cold helium.

[0022] By adopting the above technical solution, the first and second supporting components are respectively configured as supporting column structures. Utilizing the high axial stiffness of columnar components, sufficient compressive strength can be provided in the direction of gravity to stably support the weight of the superconducting magnet. Furthermore, a first supporting platform and a second supporting platform are provided at both ends of the first supporting column. The first supporting platform expands the contact area with the superconducting magnet to distribute the load, while the second supporting platform forms a surface-fitting fixation with the heat-stopping component. The second supporting column is connected to the heat-stopping component through a third supporting platform, and a fourth supporting platform is fixed to the mounting surface. This surface contact method effectively reduces local stress concentration.

[0023] This application also provides a superconducting magnet assembly, including a superconducting magnet and a support device for the superconducting magnet with the above-described structure. The support device supports the superconducting magnet along the direction of gravity of the superconducting magnet. The first support member is connected to the superconducting magnet at one end away from the heat cutoff member, and the second support member is fixed to the mounting surface at one end away from the heat cutoff member.

[0024] By employing the above technical solution, the superconducting magnet assembly, including the support device with the aforementioned structure, features a cooling channel within the heat-blocking component that actively reduces heat conduction efficiency. This results in a double blockage of heat flow from the high-temperature end (mounting surface side) to the low-temperature end (superconducting magnet side): firstly, the first and second support components can be designed with high rigidity; secondly, the circulating cooling medium actively removes conductive heat. This allows the superconducting magnet to avoid heat accumulation at the connection between the support device and the superconducting magnet while maintaining sufficient support force, effectively reducing the risk of localized heat buildup.

[0025] This application also provides a stellarator, including a Dewar and a superconducting magnet assembly with the above-described structure. The superconducting magnet of the superconducting magnet assembly is located in the inner cavity of the Dewar, and the second support component of the support device penetrates through the outer shell of the Dewar. The stellarator also includes a first cold source and a second cold source. The first cold source is used to cool the temperature of the superconducting coil of the superconducting magnet to a first temperature range, and the second cold source is used to transfer a cooling medium into the cooling channel of the heat cut-off component to cool the temperature of the heat cut-off component to a second temperature range, which is higher than the first temperature range.

[0026] By employing the above technical solution, the Dewar breaker and the superconducting magnet assembly with the aforementioned structure allow the superconducting magnet assembly to operate in a low-temperature, constant-temperature environment, while the superconducting magnet assembly utilizes a support device with active cooling capabilities. Thus, during stellarator operation, the support device not only provides stable support for the superconducting magnet but also exhibits excellent thermal cutoff performance. For example, the thermal cutoff components of the support device can maintain an intermediate temperature (50K to 80K) that is well below room temperature (around 300K) but slightly above 4.5K. Furthermore, by precisely controlling the flow rate and temperature of the cooling medium, an effective thermal barrier can be established, fundamentally reducing the final conductive heat loss and thereby improving the stability of the stellarator's operation. Attached Figure Description

[0027] Figure 1 A three-dimensional structural diagram of the support device for the superconducting magnet provided in this embodiment of the utility model;

[0028] Figure 2 An exploded structural diagram of the thermal cutoff component in the support device for the superconducting magnet provided in this embodiment of the utility model;

[0029] Figure 3 This is a cross-sectional view of the thermal cutoff component in the support device for the superconducting magnet provided in this embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. First supporting component; 110. First supporting platform; 120. Second supporting platform;

[0032] 200. Second support component; 210. Third support platform; 220. Fourth support platform;

[0033] 300. Thermal shut-off components;

[0034] 310. First connecting member; 311. First connecting port; 320. Second connecting member; 321. Second connecting port; 322. Second flow channel; 330. Main component; 331. Connecting hole. Detailed Implementation

[0035] The purpose of this application is to solve the problem that the support structure of superconducting magnets in the prior art cannot achieve both good support stability and low thermal conductivity.

[0036] The superconducting magnets mentioned above can specifically be superconducting magnets in various devices such as magnetic resonance imaging, particle accelerators, and stellarators.

[0037] To achieve the above objectives, this application provides a support device for supporting a superconducting magnet along the direction of gravity. This support device not only has sufficient support strength but also good heat cutoff performance. It can stably support the superconducting magnet while preventing excessive heat from the environment from being conducted to the superconducting magnet through the support device, thus affecting the stability of the superconducting magnet during long-term operation.

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, the support device for the superconducting magnet provided in this application includes a first support component 100, a heat cut-off component 300, and a second support component 200 connected sequentially along a first direction, the first direction being parallel to the gravity direction of the superconducting magnet.

[0040] The first support component 100 and the second support component 200 can be provided with column-shaped support or plate-shaped support structure. Specifically, the first support component 100 and the second support component 200 both extend along the first direction. The end of the first support component 100 away from the heat cut-off component 300 is used to connect with the superconducting magnet, and the end of the second support component 200 away from the heat cut-off component 300 is used to be fixedly connected with the mounting surface.

[0041] The heat shut-off component 300 refers to an intermediate structure with active cooling function. Specifically, it can be a metal component with internal cooling channels, which carries away conductive heat through circulating cooling medium. The heat shut-off component 300 has cooling channels formed inside for transmitting cooling medium. The heat shut-off component 300 has a first connecting surface facing the first support component 100 and a second connecting surface facing the second support component 200. The first connecting surface is in contact with the corresponding end face of the first support component 100, and the second connecting surface is in contact with the corresponding end face of the second support component 200.

[0042] When the support device bears the weight of the superconducting magnet, the first support component 100 and the second support component 200 transfer the load through a rigid structure, while the heat cut-off component 300 forms a low-temperature isolation zone through an internally flowing cooling medium. Heat is conducted from the high-temperature mounting surface through the second support component 200 to the heat cut-off component 300, where it is absorbed and carried away by the cooling medium, reducing heat conduction from the high-temperature side (mounting surface) to the low-temperature side (superconducting magnet). Thus, the first support component 100 and the second support component 200 can be made of high-strength metal materials and do not need to be designed as special low-thermal-conductivity materials, thereby ensuring the support stability of the superconducting magnet. Therefore, the superconducting magnet support device provided in this application has the advantages of balancing good support stability and low thermal conductivity.

[0043] The structure of the first support component 100 and the second support component 200 is not limited; for example, they can be configured as support columns, support plates, or other structures.

[0044] In one implementation, such as Figure 1 As shown, the first support component 100 is configured as a first support column, and the second support component 200 is configured as a second support column; and the two ends of the first support column are respectively connected to a first support platform 110 and a second support platform 120, and the two ends of the second support column are respectively connected to a third support platform 210 and a fourth support platform 220; wherein, the first support platform 110 is used to connect with the superconducting magnet, the end face of the second support platform 120 is attached to and fixedly connected to the first connecting surface; the end face of the third support platform 210 is attached to and fixedly connected to the second connecting surface, and the end face of the fourth support platform 220 is fixedly connected to the mounting surface; the cooling medium includes liquid nitrogen or pressurized cold helium.

[0045] Specifically, this application sets the first support component 100 and the second support component 200 as support column structures. Utilizing the high axial stiffness of columnar components, sufficient compressive strength in the direction of gravity can be provided to stably support the weight of the superconducting magnet. Furthermore, a first support platform 110 and a second support platform 120 are provided at both ends of the first support column. The first support platform 110 expands the contact area with the superconducting magnet to distribute the load, while the second support platform 120 forms a surface-fitting fixation with the heat-stopping component 300. The second support column is connected to the heat-stopping component 300 through a third support platform 210, and a fourth support platform 220 is fixed to the mounting surface. This surface contact method effectively reduces localized stress concentration.

[0046] Regarding the heat cut-off component 300, the specific structure of the heat cut-off component 300 is not limited; it can be set as an integral structure or as a split structure.

[0047] In one implementation, such as Figure 2 and Figure 3 As shown, the heat shut-off component 300 may include a first connecting member 310, a main body component 330, and a second connecting member 320, which are stacked sequentially along a first direction.

[0048] The first connecting member 310 refers to a plate-like structure in contact with the first supporting member 100. Specifically, it can be a metal plate processed to form a groove structure, creating a cooling channel. The main body member 330 refers to a plate-like structure located in the middle layer. Specifically, it can be a partition with through holes, used to separate the two side channels and establish a lateral connecting path. The second connecting member 320 refers to a plate-like structure in contact with the second supporting member 200. Specifically, it can be a metal plate symmetrical to the first connecting member 310.

[0049] The first connecting member 310 forms a first connecting surface on the side facing away from the main member 330, and the second connecting member 320 forms a second connecting surface on the side facing away from the main member 330. A first flow channel is formed on the side wall of the first connecting member 310 closest to the main member 330 (not shown in the figure, see details). Figure 2 The second connecting member 320 has a second flow channel 322 formed on one side wall near the main member 330 (the second flow channel 322 is symmetrical to the main member 330). The main member 330 has a connecting hole 331 that connects the first flow channel and the second flow channel 322. The connecting hole 331 is a channel that penetrates the main member 330, which can be formed by drilling or etching processes, and is used to realize the flow of cooling medium between layers.

[0050] In this embodiment, the heat shut-off component 300 is configured as three stacked components. The first connecting component 310 and the second connecting component 320, through the first flow channel and the second flow channel 322 formed on their sidewalls, respectively, form a flow path for the cooling medium with the connecting hole 331 of the main component 330. The first connecting component 310 and the second connecting component 320 serve as the connection interface between the heat shut-off component 300 and the supporting component. The flow channels they form are close to the main component 330, allowing the cooling medium to enter along the first flow channel, then penetrate laterally through the connecting hole 331 into the main component 330, and then enter the second flow channel 322, thereby forming a three-dimensional cooling path inside the heat shut-off component 300. This layered structure not only simplifies the processing difficulty of complex flow channels through stacked assembly, but also avoids weakening the overall structural strength of the supporting device by distributing the flow channels on the sidewalls of the connecting components rather than inside the main component 330.

[0051] Furthermore, regarding the structure of the heat shut-off component 300 in the above embodiments, as follows: Figure 2 As shown, the first connecting member 310 is configured as a first connecting plate, the second connecting member 320 is configured as a second connecting plate, and the main body member 330 is configured as a partition. The first connecting plate and the second connecting plate are respectively attached to the partition and fixed to each other. The first connecting plate has a first connecting port 311 communicating with the first flow channel, and the second connecting plate has a second connecting port 321 communicating with the second flow channel 322. One of the first connecting port 311 and the second connecting port 321 is a cooling medium inlet, and the other is a cooling medium outlet.

[0052] The first connecting plate refers to the metal sheet in contact with the partition plane. Specifically, it can be machined to form a groove structure to construct cooling channels and transfer supporting loads. The partition is a plate-like structure located between the first and second connecting plates, which allows for the directional flow of the cooling medium between the upper and lower channels through connecting holes 331. The first connecting port 311 and the second connecting port 321 are tubular interfaces respectively opened on the edges of the connecting plates. They can be connected to external cooling pipes by welding or flange connections, and the staggered arrangement of the inlet and outlet extends the heat exchange path of the cooling medium within the channels.

[0053] Specifically, after the cooling medium enters the first flow channel of the first connecting plate through the inlet, it flows laterally along the channel formed by the groove, then enters the second flow channel 322 of the second connecting plate through the connecting hole 331 of the partition, and finally exits from the outlet. During this process, the partition blocks heat conduction along the direction of gravity, while the continuous flow of the cooling medium within the flow channel further absorbs and carries away heat. The planar fit and fixation between the first connecting plate and the partition not only ensures structural rigidity but also achieves flow channel sealing through large-area contact, preventing cooling medium leakage. The staggered design of the connection port requires the cooling medium to flow through the entire length of the flow channel, thereby improving heat exchange efficiency.

[0054] The arrangement of the first and second flow channels is not limited. For example, they can be pipes embedded in the first and second connecting plates, or they can be grooves formed directly in the first and second connecting plates.

[0055] In one implementation, such as Figure 2 As shown, the first connecting plate has a plurality of first grooves (not shown) arranged side by side and interconnected on one side wall near the partition, and the second connecting plate has a plurality of second grooves corresponding to and interconnected with the plurality of first grooves on one side wall near the partition; wherein, the plurality of first grooves are sealed and fitted with one side wall of the partition to form a first flow channel, and the plurality of second grooves are sealed and fitted with the other side wall of the partition to form a second flow channel 322.

[0056] The number of the first and second grooves is unlimited; for example, it can be 10, 31, 40, etc.

[0057] Furthermore, the partition has a plurality of connecting holes 331, each corresponding to a plurality of first grooves and a plurality of second grooves, and each connecting hole 331 connects the corresponding first groove and second groove. The number of connecting holes 331 corresponds to the number of first grooves and second grooves, and their area can be set to between 2 square millimeters and 4 square millimeters.

[0058] Furthermore, the first connection port 311 communicates with at least one of the multiple first grooves, and the second connection port 321 communicates with at least one of the multiple second grooves. The first connection port 311 can communicate with one, two, three, or even more of the first grooves. The second connection port 321 is configured similarly to the first connection port 311; for example, it can communicate with one, two, three, or even more of the second grooves. In this solution, by communicating the first connection port 311 and the second connection port 321 with different grooves, multiple grooves can be connected to form a circuitous path, extending the residence time of the cooling medium and ensuring that the cooling medium is discharged after heat exchange, resulting in better cooling performance.

[0059] In one implementation, such as Figure 2 As shown, the first connection port 311 is connected to the outermost first groove among a plurality of first grooves, and the second connection port 321 is connected to the outermost second groove among a plurality of second grooves. The first connection port 311 and the second connection port 321 are offset in the second direction. The plurality of first grooves are arranged side by side in the second direction, and the second direction is perpendicular to the first direction.

[0060] In use, the cooling medium enters the outermost first groove through the first connection port 311, flows sequentially through all the parallel branches of the first groove along the second direction, and then enters the corresponding second groove through the connecting hole 331 of the partition. Since the second connection port 321 is located in the outermost second groove and is perpendicularly offset from the first connection port 311, the cooling medium needs to penetrate the entire internal space of the heat cut-off component 300 laterally, forming a meandering flow path.

[0061] This application also provides a superconducting magnet assembly, including a superconducting magnet (not shown) and a support device for the superconducting magnet with the above-described structure (see [link to application]). Figure 1 and Figure 2 The support device supports the superconducting magnet along the direction of gravity of the superconducting magnet; wherein, the end of the first support component 100 away from the heat cut-off component 300 is connected to the superconducting magnet, and the end of the second support component 200 away from the heat cut-off component 300 is fixed to the mounting surface.

[0062] It is important to understand that the superconducting magnet assembly refers to an integrated structure consisting of a superconducting magnet and a support device. The mounting surface refers to the external fixing base of the support device, such as a Dewar shell or an external support frame, which serves to provide a rigid fixing foundation for the second support component 200.

[0063] Specifically, the superconducting magnet assembly, due to the inclusion of the aforementioned support structure, features a cooling channel within the heat-blocking component 300 that actively reduces heat conduction efficiency. This effectively blocks the heat flow from the high-temperature end (mounting surface side) to the low-temperature end (superconducting magnet side): firstly, the first support component 100 and the second support component 200 can be configured with relatively high rigidity; secondly, the circulating cooling medium actively removes conductive heat. This ensures that the superconducting magnet, while possessing sufficient support force, avoids heat accumulation at the connection between the support device and the superconducting magnet, effectively reducing the risk of localized heat buildup.

[0064] This application also provides a stellarator, including a Dewar (not shown) and a superconducting magnet assembly with the above-described structure. The superconducting magnet of the superconducting magnet assembly is located in the inner cavity of the Dewar, and the second support member 200 of the support device penetrates through the outer shell of the Dewar. The stellarator also includes a first cold source and a second cold source (not shown). The first cold source is used to cool the temperature of the superconducting coil of the superconducting magnet to a first temperature range, and the second cold source is used to cool the heat cutoff member 300 (see [reference]). Figure 1 and Figure 2 Cooling medium is transferred within the cooling channel to cool the temperature of the heat cut-off component 300 to a second temperature range, which is higher than the first temperature range.

[0065] A Dewar is a sealed container used to maintain the low-temperature environment of a superconducting magnet. Specifically, it can be made of multi-layered insulation materials and a vacuum sandwich structure, forming a thermal isolation barrier between its outer shell and internal cavity.

[0066] The second support component 200 penetrating the Dewar shell refers to the part of the support device that connects to the mounting surface passing through the Dewar wall. Specifically, the penetrating part can be wrapped with a material with low thermal conductivity to reduce the thermal bridging effect.

[0067] The first cold source refers to the cryogenic refrigeration system required to maintain the superconducting coil in the superconducting state. Specifically, it can be a liquid helium cycle or a cryogenic refrigerator. Its function is to stabilize the temperature of the superconducting coil in the first temperature range, such as cooling it to 4.2K to 4.5K.

[0068] The second cold source refers to an independent refrigeration system that provides intermediate temperature cooling for the heat cut-off component 300. Specifically, it can use liquid nitrogen circulation or cold helium circulation. Its function is to actively cool the heat cut-off component 300 to form a second temperature range (i.e., 50K to 80K), thereby forming a temperature gradient with the first temperature range to block the heat conduction path.

[0069] Specifically, when the second support component 200 penetrates the Dewar shell, the heat-blocking component 300 is cooled to a second temperature range by the second cold source, forming a two-stage temperature gradient inside the support device: from room temperature to the second temperature range, and then to the first temperature range. After heat is transferred from the Dewar shell to the second temperature range, because the temperature difference between the second and first temperature ranges is significantly lower than the direct temperature difference between room temperature and the first temperature range, the overall heat leakage is decomposed into two stages of heat transfer processes with smaller temperature differences. The first cold source acts independently on the superconducting coil, keeping it at an extremely low temperature, while the second cold source manages the heat-blocking component 300 through cooling channels, blocking the conduction path of external heat to the superconducting magnet. The setting of the second temperature range being higher than the first temperature range ensures unidirectional heat transfer, avoiding energy loss caused by reverse heat exchange. Thus, when the stellarator is working, the support device can not only provide stable support for the superconducting magnet but also has good heat-blocking performance. For example, the heat-blocking component 300 of the support device itself can maintain an intermediate temperature (e.g., 50K to 80K) that is much lower than room temperature (around 300K) but slightly higher than 4.5K. Furthermore, by precisely controlling the flow rate and temperature of the cooling medium, an effective thermal barrier can be established, fundamentally reducing the final conduction of heat loss, thereby improving the stability of the stellarator.

[0070] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0071] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0072] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0073] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0074] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0075] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A support device of a superconducting magnet for supporting the superconducting magnet in a direction of gravity of the superconducting magnet, characterized by, The support device includes a first support component, a heat cut-off component, and a second support component connected sequentially along a first direction, wherein the first direction is parallel to the gravitational direction of the superconducting magnet. Furthermore, both the first support member and the second support member extend along the first direction. The end of the first support member away from the heat cutoff member is used to connect with the superconducting magnet, and the end of the second support member away from the heat cutoff member is used to be fixedly connected with the mounting surface. The heat-stopping component has cooling channels formed inside for transporting cooling medium. The heat-stopping component has a first connecting surface facing the first supporting component and a second connecting surface facing the second supporting component. The first connecting surface is in contact with the corresponding end face of the first supporting component, and the second connecting surface is in contact with the corresponding end face of the second supporting component. The heat shut-off component includes a first connecting member, a main body member, and a second connecting member stacked sequentially along the first direction. The first connecting member has a first flow channel formed on one side wall near the main body member, and the second connecting member has a second flow channel formed on one side wall near the main body member. The main body member has a connecting hole that connects the first flow channel and the second flow channel.

2. The support apparatus for a superconducting magnet of claim 1, wherein The first connecting member forms the first connecting surface on one side away from the main body member, and the second connecting member forms the second connecting surface on one side away from the main body member.

3. The support arrangement for a superconducting magnet of claim 2, wherein The first connecting member is configured as a first connecting plate, the second connecting member is configured as a second connecting plate, and the main body member is configured as a partition; wherein... The first connecting plate and the second connecting plate are respectively attached to the partition and fixed to each other. The first connecting plate has a first connection port communicating with the first flow channel, and the second connecting plate has a second connection port communicating with the second flow channel. One of the first connection port and the second connection port is a cooling medium inlet and the other is a cooling medium outlet.

4. The support apparatus for a superconducting magnet of claim 3, wherein The first connecting plate has a plurality of first grooves arranged side-by-side and communicating with each other on one side wall near the partition, and the second connecting plate has a plurality of second grooves corresponding one-to-one with the plurality of first grooves and communicating with each other on one side wall near the partition; wherein, The plurality of first grooves are sealed and fitted with one side wall of the partition to form the first flow channel, and the plurality of second grooves are sealed and fitted with the other side wall of the partition to form the second flow channel.

5. The support device for the superconducting magnet as described in claim 4, characterized in that, The partition plate has a plurality of connecting holes, and the plurality of connecting holes correspond one-to-one with the plurality of first grooves and the plurality of second grooves, and each connecting hole connects the corresponding first groove and the second groove.

6. The support device for the superconducting magnet as described in claim 4, characterized in that, The first connection port is connected to at least one of the plurality of first grooves, and the second connection port is connected to at least one of the plurality of second grooves.

7. The support device for the superconducting magnet as described in claim 4, characterized in that, The first connection port communicates with the outermost first groove among the plurality of first grooves, and the second connection port communicates with the outermost second groove among the plurality of second grooves. The first connection port and the second connection port are offset in a second direction. The plurality of first grooves are arranged side by side in the second direction, and the second direction is perpendicular to the first direction.

8. The support device for the superconducting magnet as described in any one of claims 1 to 7, characterized in that, The first supporting component is configured as a first supporting column, and the second supporting component is configured as a second supporting column; and... The first support column is connected to a first support platform and a second support platform at both ends, and the second support column is connected to a third support platform and a fourth support platform at both ends; wherein, The first support platform is used to connect with the superconducting magnet; the end face of the second support platform is attached to and fixedly connected with the first connection surface; the end face of the third support platform is attached to and fixedly connected with the second connection surface; and the end face of the fourth support platform is fixedly connected to the mounting surface. The cooling medium includes liquid nitrogen or pressurized cold helium.

9. A superconducting magnet assembly, comprising a superconducting magnet, characterized in that, It also includes a support device for the superconducting magnet as described in any one of claims 1 to 8, wherein the support device supports the superconducting magnet along the direction of gravity of the superconducting magnet; wherein... The end of the first support member away from the heat cutoff member is connected to the superconducting magnet, and the end of the second support member away from the heat cutoff member is fixed to the mounting surface.

10. A stellarator, characterized in that, The device includes a Dewar and a superconducting magnet assembly as described in claim 9, wherein the superconducting magnet of the superconducting magnet assembly is located in the inner cavity of the Dewar, and the second support member of the support device penetrates the outer shell of the Dewar; The stellarator further includes a first cold source and a second cold source. The first cold source is used to cool the temperature of the superconducting coil of the superconducting magnet to a first temperature range. The second cold source is used to transfer a cooling medium into the cooling channel of the heat cut-off component so that the temperature of the heat cut-off component is cooled to a second temperature range, which is higher than the first temperature range.

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