Conductive assembly of superconducting magnet and superconducting magnet

Abstract

The utility model provides a conductive assembly of a superconducting magnet. The conductive assembly comprises a cathode tube (10), an anode tube (20) and a connecting unit (30). The positive electrode tube (20) penetrates through a tube cavity of the negative electrode tube (10) and is separated from the negative electrode tube (10); the connecting unit (30) is used for connecting the positive electrode tube (20) and the negative electrode tube (10) in an insulating and heat-conducting manner and fixing the relative positions of the positive electrode tube (20) and the negative electrode tube (10). The connecting unit (30) comprises a first cooling unit (31) and a second cooling unit (32). The first cooling unit (31) is connected with the cathode tube (10) and is used for being connected with a cold source in a heat conduction manner. The second cooling unit (32) is connected to the positive electrode tube (20) and is detachably connected to the first cooling unit (31). And the positive electrode tube (20) and the negative electrode tube (10) can be detached from each other through the connecting unit (30). According to the conductive assembly of the superconducting magnet, the connecting unit has a detachable structure, so that the processing is convenient, the processing cost is saved, and the later maintenance is convenient. In addition, the utility model also provides a superconducting magnet comprising the conductive assembly.

Description

Technical Field

[0001] The utility model relates to a conductive component, in particular to a conductive component used for transmitting electric energy between the outside of a vacuum container of a superconducting magnet and the inside of a low-temperature device, and a superconducting magnet comprising the conductive component. Background Art

[0002] Superconducting magnets are commonly used in magnetic resonance imaging systems. Superconducting magnets include a vacuum container and a cryogenic device. The cryogenic device contains a coolant such as liquid helium, and the superconducting coil is immersed in the coolant. The cryogenic device is installed in the vacuum container to reduce heat exchange with the outside world.

[0003] The superconducting magnet is also provided with a conductive component to provide electrical energy to the superconducting coil in the cryogenic device. The conductive component includes a positive tube, a negative tube and a connecting block for connecting the positive tube and the negative tube. The two ends of the negative tube are respectively connected to the vacuum container and the cryogenic device to form a channel connecting the outside of the vacuum container and the inside of the cryogenic device, and this channel can be used as a discharge path for helium during the quenching process of the superconducting magnet. The positive tube is inserted into the negative tube and fixed to the negative tube by a connecting block. Commonly used connecting blocks such as copper blocks are used to connect cold sources to cool the positive tube and the negative tube, thereby reducing the heat conducted to the cryogenic device through the positive tube and the negative tube. Electrical insulation is required between the connecting block and the positive tube and good thermal conductivity is maintained. To achieve this purpose, the manufacturing process of the currently commonly used conductive components is complicated and the cost is high. Utility Model Content

[0004] The utility model aims to provide a conductive component of a superconducting magnet, which is easy to process and helps to save processing costs.

[0005] Another object of the utility model is to provide a superconducting magnet, the conductive components of which are easy to process, thereby saving processing costs.

[0006] The utility model provides a conductive component of a superconducting magnet, which includes a negative electrode tube, a positive electrode tube and a connecting unit. The positive electrode tube is inserted into the tube cavity of the negative electrode tube and is separated from the negative electrode tube. The connecting unit connects the positive electrode tube and the negative electrode tube in an insulated and heat-conductive manner, and fixes the relative positions of the positive electrode tube and the negative electrode tube. The connecting unit includes a first cooling unit and a second cooling unit. The first cooling unit is connected to the negative electrode tube and is used to connect to a cold source in a heat-conductive manner. The second cooling unit is connected to the positive electrode tube and is detachably connected to the first cooling unit. The positive electrode tube and the negative electrode tube can be detached from each other through the connecting unit.

[0007] The connection unit of the conductive component of the superconducting magnet has a detachable structure, which is easy to process, helps save processing costs, and is convenient for subsequent maintenance.

[0008] In another exemplary embodiment of the conductive component of the superconducting magnet, the first cooling unit and the second cooling unit can be connected thermally, and the connecting unit further includes an insulating unit. The insulating unit is disposed between the first cooling unit and the second cooling unit to achieve electrical insulation between the first cooling unit and the second cooling unit, and / or is disposed between the positive tube and the second cooling unit to achieve electrical insulation between the positive tube and the second cooling unit. This structure can be easily processed.

[0009] In another exemplary embodiment of the conductive component of the superconducting magnet, the connecting unit further comprises a connecting member. The connecting member is arranged through one of the first cooling unit and the second cooling unit and connects the other. The structure is simple and easy to assemble.

[0010] In another exemplary embodiment of the conductive assembly of the superconducting magnet, the negative electrode tube includes an upper tube portion and a lower tube portion that are separated and arranged along the length direction thereof. The first cooling unit connects the opposite ends of the upper tube portion and the lower tube portion along the length direction and closes the gap between the upper tube portion and the lower tube portion, thereby facilitating the improvement of heat conduction efficiency.

[0011] In another exemplary embodiment of the conductive component of the superconducting magnet, the first cooling unit includes an inner cooling body and an outer cooling body. The inner cooling body and the outer cooling body are respectively arranged on the inner and outer sides of the tube wall of the negative electrode tube and are arranged opposite to each other along the wall thickness direction of the tube wall. The outer cooling body is used to connect the cold source in a heat-conductive manner. The second cooling unit is detachably connected to the inner cooling body. This helps to reduce the difficulty of processing.

[0012] In another exemplary embodiment of the conductive component of the superconducting magnet, the second cooling unit is a hoop and surrounds the positive tube. The insulating unit includes an insulating sleeve. The insulating sleeve is sandwiched between the second cooling unit and the positive tube to achieve electrical insulation between the second cooling unit and the positive tube. This facilitates the assembly of the second cooling unit and the positive tube.

[0013] In another exemplary embodiment of the conductive component of the superconducting magnet, the first cooling unit has a first flat plate portion perpendicular to the length direction of the negative electrode tube. The second cooling unit has a second flat plate portion perpendicular to the length direction of the negative electrode tube. The connecting member is provided through one of the first flat plate portion and the second flat plate portion along the length direction and is threadedly connected to the other. The insulating unit includes an insulating gasket. The insulating gasket is sandwiched between the first flat plate portion and the second flat plate portion to achieve electrical insulation between the first flat plate portion and the second flat plate portion. This facilitates the installation operation.

[0014] In another exemplary embodiment of the conductive assembly of the superconducting magnet, the connecting unit further comprises an insulating sleeve. The insulating sleeve is sleeved on the connecting piece and is located between the connecting piece and a structure that is passed through the connecting piece and is not threadedly connected, so as to achieve electrical insulation between the connecting piece and the structure. In this way, when the connecting piece is conductive, the positive electrode tube can be prevented from being electrically connected to the negative electrode tube through the second cooling unit, the connecting piece and the first cooling unit.

[0015] In another exemplary embodiment of the conductive component of the superconducting magnet, the positive electrode tube and / or the negative electrode tube are made of stainless steel; and / or the first cooling unit and / or the second cooling unit are made of copper; and / or the insulating unit and / or the insulating sleeve are made of a combination of one or more of polyester, polyimide, polytetrafluoroethylene, nylon, fiberglass, rubber and ceramic.

[0016] In another exemplary embodiment of the conductive assembly of the superconducting magnet, the conductive assembly further includes two wiring assemblies. Each wiring assembly includes a positive terminal and a lead wire connected to the positive terminal. The positive terminals of the two wiring assemblies can be conductively connected to the two ends of the positive tube. The positive tube can be connected to the power supply and the superconducting coil respectively through the lead wires of the two wiring assemblies. This facilitates the connection of the power supply and the superconducting coil.

[0017] The utility model also provides a superconducting magnet, which includes a vacuum container, a cryogenic device, a superconducting coil and the above-mentioned conductive component. The cryogenic device is arranged in the vacuum container. The superconducting coil is arranged in the cryogenic device. The two ends of the negative electrode tube are respectively connected to the vacuum container and the cryogenic device to connect the outside of the vacuum container and the inside of the cryogenic device. The positive electrode tube can be conductively connected to the superconducting coil and is used to connect the positive pole of the power supply. The conductive component of the superconducting magnet, its connecting unit has a detachable structure, which is convenient for processing, helps to save processing costs, and is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0019] Figure 1 A schematic structural diagram of an exemplary implementation of a conductive component of a superconducting magnet.

[0020] Figure 2 For use Figure 1 Schematic diagram of the structure of a superconducting magnet with conductive components shown.

[0021] Figure 3 It is a schematic structural diagram of a second exemplary embodiment of a conductive component.

[0022] Figure 4 For display Figure 3 The conductive components shown are the positive tube and the second cooling unit.

[0023] Figure 5 It is a schematic structural diagram of a third exemplary embodiment of a conductive component.

[0024] Figure 6 It is a schematic structural diagram of a fourth exemplary embodiment of a conductive component.

[0025] Figure 7 It is a schematic structural diagram of a fifth exemplary embodiment of a conductive component.

[0026] Figure 8 It is a structural schematic diagram of a sixth exemplary embodiment of a conductive component.

[0027] Description of symbols

[0028] 10 Cathode tube

[0029] 11 Upper tube

[0030] 12 Lower tube

[0031] 20 Positive tube

[0032] 30 Connection unit

[0033] 31. First cooling unit

[0034] 311 Internal cooling body

[0035] 312 External cooling body

[0036] 313 outer periphery

[0037] 315 First flat plate

[0038] 32 Second cooling unit

[0039] 325 Second flat plate

[0040] 33 Insulation sleeve

[0041] 34 Insulation gasket

[0042] 35 Connectors

[0043] 36 Insulation sleeve

[0044] 40 Wiring components

[0045] 41 Positive terminal

[0046] 42 Lead

[0047] 100 Conductive components

[0048] 200 Vacuum container

[0049] 300 Cryogenic Device

[0050] 400 Superconducting Coil

[0051] 500 Heat Shield

[0052] L Length direction

[0053] P Channel DETAILED DESCRIPTION

[0054] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0055] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0056] In this article, "first", "second", etc. do not indicate their importance or order, but are only used to indicate the difference between each other for the convenience of document description.

[0057] In order to make the drawings concise, each figure only schematically shows the parts related to the utility model, which do not represent the actual structure of the product.

[0058] Figure 1 A schematic structural diagram of an exemplary implementation of a conductive component of a superconducting magnet. Figure 2 For use Figure 1 Schematic diagram of the structure of the superconducting magnet with conductive components shown in FIG. Figure 2 As shown, the superconducting magnet comprises a vacuum container 200, a cryogenic device 300 and a superconducting coil 400. The superconducting magnet is used, for example, as a part of a magnetic resonance imaging system to generate a main magnetic field required for magnetic resonance imaging.

[0059] The cryogenic device 300 is disposed in the vacuum container 200. The superconducting coil 400 is disposed in the cryogenic device 300. The superconducting coil 400 is used to generate a magnetic field after being energized. A coolant such as liquid helium is contained in the cryogenic device 300, and the superconducting coil 400 is immersed in the coolant. The inside of the vacuum container 200 maintains a vacuum state to reduce gas heat conduction and convection. The superconducting magnet, for example, also includes a heat shield 500. The heat shield 500 is located between the cryogenic device 300 and the vacuum container 200, and is used to prevent heat radiation from the outside of the heat shield 500 from reaching the cryogenic device 300.

[0060] The conductive component 100 connects the vacuum container 200 and the cryogenic device 300 to form a channel connecting the outside of the vacuum container 200 and the inside of the cryogenic device 300, and this channel can be used as a discharge path for helium during the superconducting magnet quench process. The conductive component 100 is also used to connect a power source to power the superconducting coil 400.

[0061] like Figure 1 As shown, the conductive component 100 of the superconducting magnet includes a negative electrode tube 10, a positive electrode tube 20 and a connecting unit 30. The negative electrode tube 10 is used to connect the negative electrode of the power supply, and the positive electrode tube 20 is used to connect the positive electrode of the power supply.

[0062] In this exemplary embodiment, the negative electrode tube 10 includes an upper tube portion 11 and a lower tube portion 12 that are separated along the length direction L thereof. A first cooling unit 31 of the connecting unit 30 connects the opposite ends (i.e., the ends) of the upper tube portion 11 and the lower tube portion 12 along the length direction L. Figure 1 The lower end of the upper tube portion 11 and the upper end of the lower tube portion 12 are connected to each other, and the gap between the upper tube portion 11 and the lower tube portion 12 is closed. However, it is not limited thereto. In other exemplary embodiments, the negative electrode tube 10 may also be an integrated tube extending along the length direction L.

[0063] The negative electrode tube 10 has two ends along its length L (i.e. Figure 1 The upper end of the middle upper tube portion 11 and the lower end of the lower tube portion 12 are respectively used to connect the vacuum container and the cryogenic device to form a channel P connecting the outside of the vacuum container and the inside of the cryogenic device. The positive tube 20 is arranged through the channel P and is separated from the negative tube 10 to be insulated from each other. The material of the positive tube 20 and the negative tube 10 is, for example, stainless steel. The wall thickness of the negative tube 10 is set as thin as possible to reduce heat transfer from the vacuum container to the cryogenic device.

[0064] The connection unit 30 connects the positive tube 20 and the negative tube 10 in an insulated and heat-conductive manner, and fixes the relative positions of the positive tube 20 and the negative tube 10. The connection unit 30 includes a first cooling unit 31 and a second cooling unit 32. The first cooling unit 31 is connected to the negative tube 10 and is used to connect the cold source in a heat-conductive manner. The second cooling unit 32 is connected to the positive tube 20 and is detachably connected to the first cooling unit 31. The positive tube 20 and the negative tube 10 can be detached from each other through the connection unit 30.

[0065] Specifically, Figure 1As shown, in this exemplary embodiment, the first cooling unit 31 is, for example, an integrated copper block, which is connected to the upper tube portion 11 and the lower tube portion 12 by a vacuum brazing process, and the vacuum brazing process has good sealing. The first cooling unit 31, the upper tube portion 11 and the lower tube portion 12 form a channel P that runs through the length direction L, and the positive tube 20 is inserted into the channel P. The outer peripheral edge portion 313 of the first cooling unit 31 is used to connect a cold source, such as a refrigerator. The second cooling unit 32 is, for example, an integrated copper block, which is connected to the positive tube 20 by a brazing process. The fitting surface between the second cooling unit 32 and the positive tube 20 is, for example, an annular surface extending along the circumference of the positive tube 20, so that the cooling of the positive tube 20 can be more uniform and the cooling efficiency can be higher.

[0066] In this exemplary embodiment, the connecting unit 30 further includes a connecting member 35. The connecting member 35 is provided in the light hole (i.e., a hole without threads) of the second cooling unit 32 and is connected to the first cooling unit 31, and the connection is, for example, a threaded connection. Of course, in other exemplary embodiments, the connecting member 35 may also be provided in the light hole of the first cooling unit 31 and is connected to the second cooling unit 32, and the connection is, for example, a threaded connection. Thereby, the second cooling unit 32 and the first cooling unit 31 can be disassembled by installing or removing the connecting member 35, thereby realizing the mutual fixation and detachment of the positive tube 20 and the negative tube 10. The structure is simple and easy to assemble, but is not limited thereto. In other exemplary embodiments, the connecting member 35 may not be threadedly connected to the first cooling unit 31 or the second cooling unit 32, but is fixed to the first cooling unit 31 and the second cooling unit 32 by cooperating with a nut. Of course, in other exemplary embodiments, the first cooling unit 31 and the second cooling unit 32 may also be detachably connected by other structures.

[0067] In this exemplary embodiment, the connection unit 30 further includes an insulating unit. The insulating unit is disposed between the first cooling unit 31 and the second cooling unit 32 to achieve electrical insulation between the first cooling unit 31 and the second cooling unit 32, thereby achieving electrical insulation between the positive electrode tube 20 and the negative electrode tube 10. Specifically, Figure 1As shown, in this schematic embodiment, the insulating unit includes an insulating gasket 34. The insulating gasket 34 is sandwiched between the first cooling unit 31 and the second cooling unit 32, so as to achieve electrical insulation between the first cooling unit 31 and the second cooling unit 32. In this schematic embodiment, the first cooling unit 31 and the second cooling unit 32 are thermally connected through the insulating gasket 34. In other schematic embodiments, the insulating unit may also be provided between the positive tube 20 and the second cooling unit 32 to achieve electrical insulation between the positive tube 20 and the second cooling unit 32, so as to achieve electrical insulation between the positive tube 20 and the negative tube 10. Of course, in other schematic embodiments, an insulating unit may also be provided between the first cooling unit 31 and the second cooling unit 32 and between the positive tube 20 and the second cooling unit 32.

[0068] During the use of the conductive component 100, the outer peripheral edge portion 313 of the first cooling unit 31 is connected to a cold source to obtain cold energy. The first cooling unit 31 transfers the received cold energy to the negative tube 10 to reduce the temperature of the negative tube 10, and transfers the cold energy to the positive tube 20 through the insulating gasket 34 and the second cooling unit 32 to reduce the temperature of the positive tube 20, thereby reducing the heat transfer from the vacuum container to the low-temperature device.

[0069] In order to make the insulating unit have good thermal conductivity, it is preferably made of a material that is electrically insulating and has good thermal conductivity. The material of the insulating unit is, for example, a combination of one or more of polyester, polyimide, polytetrafluoroethylene, nylon, fiberglass, rubber and ceramic.

[0070] In the process of preparing the conductive assembly 100, for example, the upper tube portion 11 and the lower tube portion 12 may be first connected to the first cooling unit 31, and the positive tube 20 may be connected to the second cooling unit 32, and then the insulating gasket 34 may be laid on the first cooling unit 31, and then the assembly after the positive tube 20 and the second cooling unit 32 are connected may be placed in place, and finally the connector 35 may be passed through the second cooling unit 32 and the insulating gasket 34 and threadedly connected to the first cooling unit 31. When the positive tube 20 needs to be removed in later maintenance, only the connector 35 needs to be unscrewed.

[0071] The connection unit of the conductive component of the superconducting magnet has a detachable structure, which is easy to process, helps save processing costs, and is convenient for subsequent maintenance.

[0072] like Figure 1As shown, in the exemplary embodiment, the first cooling unit 31 has a first flat plate portion 315 perpendicular to the length direction L of the negative tube 10. The second cooling unit 32 has a second flat plate portion 325 perpendicular to the length direction L of the negative tube 10. The connecting member 35 is arranged in the second flat plate portion 325 along the length direction L and is threadedly connected to the first flat plate portion 315. The insulating gasket 34 is sandwiched between the first flat plate portion 315 and the second flat plate portion 325 to achieve electrical insulation between the first flat plate portion 315 and the second flat plate portion 325. This facilitates the installation operation.

[0073] In the exemplary embodiment, the connector 35 is, for example, a conductive material, such as stainless steel. In order to prevent the positive tube 20 from being electrically connected to the negative tube 10 through the second cooling unit 32, the connector 35 and the first cooling unit 31, the connecting unit 30 is further provided with an insulating sleeve 36. The insulating sleeve 36 is sleeved on the connector 35 and is located between the connector 35 and the second cooling unit 32 to achieve electrical insulation between the connector 35 and the second cooling unit 32. In this way, when the connector 35 is conductive, the positive tube 20 can be prevented from being electrically connected to the negative tube 10 through the second cooling unit 32, the connector 35 and the first cooling unit 31. The material of the insulating sleeve 36 is, for example, a combination of one or more of polyester, polyimide, polytetrafluoroethylene, nylon, fiberglass, rubber and ceramic. It can be understood that if the connector 35 is an insulating material, the insulating sleeve 36 may not be provided.

[0074] like Figure 1 As shown, in the exemplary embodiment, the conductive assembly 100 further includes two wiring assemblies 40. Each wiring assembly 40 includes a positive terminal 41 and a lead 42 connected to the positive terminal 41. The positive terminals 41 of the two wiring assemblies 40 can be respectively connected to the two ends of the positive tube 20 in a conductive manner. The positive tube 20 can be respectively connected to the power supply and the superconducting coil through the lead 42 of the two wiring assemblies 40. This facilitates the connection of the power supply and the superconducting coil.

[0075] Figure 3 FIG. 1 is a schematic diagram of the structure of a second exemplary embodiment of a conductive component. Figure 1 The same or similar parts of the conductive components shown are not described in detail here, and the differences are as follows. Figure 3 As shown, in this exemplary embodiment, the second cooling unit 32 is a clamp and surrounds the positive tube 20 . Figure 4 Shows Figure 3 The second cooling unit 32 and the positive tube 20 are shown in FIG. Figure 3 The length direction L is in the middle. This facilitates the assembly of the second cooling unit 32 and the positive tube 20. It can be understood that in order to increase the thermal conductivity, the second cooling unit 32 should fit the surface of the positive tube 20 as much as possible.

[0076] Figure 5 FIG. 1 is a schematic diagram of the structure of a third exemplary embodiment of a conductive component. Figure 3 The same or similar parts of the conductive components shown are not described in detail here, and the differences are as follows. Figure 5 As shown, in this exemplary embodiment, the insulating gasket 34 and the insulating sleeve 36 are not provided. In order to meet the insulation requirements, in this exemplary embodiment, the insulating unit includes an insulating sleeve 33. The insulating sleeve 33 is sandwiched between the second cooling unit 32 and the positive tube 20 to achieve electrical insulation between the second cooling unit 32 and the positive tube 20. This simplifies the structure. The insulating sleeve 33 is, for example, cylindrical, but not limited to this. Figure 5 In the illustrated exemplary embodiment, the first cooling unit 31 and the second cooling unit 32 are in direct contact with each other for heat conduction.

[0077] Figure 6 FIG. 1 is a schematic diagram of the structure of a fourth exemplary embodiment of a conductive component. Figure 1 The same or similar parts of the conductive components shown are not described in detail here, and the differences are as follows. Figure 6 As shown, in this schematic embodiment, the negative electrode tube 10 is an integrated tubular shape extending along the length direction L, and its material is, for example, stainless steel. The first cooling unit 31 includes an inner cooling body 311 and an outer cooling body 312, and its material is, for example, copper. The inner cooling body 311 and the outer cooling body 312 are respectively arranged on the inner and outer sides of the tube wall of the negative electrode tube 10 and are arranged oppositely along the wall thickness direction of the tube wall. The relative arrangement can help improve the heat conduction efficiency. The outer cooling body 312 is used to connect the cold source in a heat-conductive manner. The second cooling unit 32 is detachably connected to the inner cooling body 311. Since the integrated negative electrode tube 10 is compared with the two-stage negative electrode tube 10 (i.e. Figure 1 The negative electrode tube 10 shown in the figure does not need to use a vacuum brazing process to achieve a sealed connection between the first cooling unit 31 and the upper tube portion 11 and the lower tube portion 12. The integrated negative electrode tube 10 only needs to connect the inner cooling body 311 and the outer cooling body 312 through a hard brazing process, which helps to reduce the difficulty of processing. The fitting surface between the outer cooling body 312 and the negative electrode tube 10 is, for example, an annular surface extending along the circumference of the negative electrode tube 10, which can make the cooling of the negative electrode tube 10 more uniform and more efficient.

[0078] Figure 7 is a schematic structural diagram of a fifth exemplary embodiment of a conductive component, which is Figure 3 Adjustments are made based on the conductive components shown, and the adjustments are made with Figure 6 The conductive components shown in Figure 1 The contents of adjustment are the same as those shown on the conductive component basis.

[0079] Figure 8is a schematic structural diagram of a sixth exemplary embodiment of a conductive component, which is Figure 5 Adjustments are made based on the conductive components shown, and the adjustments are made with Figure 6 The conductive components shown in Figure 1 The contents of adjustment are the same as those shown on the conductive component basis.

[0080] The utility model also provides a superconducting magnet, which is used as a part of a magnetic resonance imaging system to generate a main magnetic field required for magnetic resonance imaging. Figure 2 As shown, in an exemplary embodiment of a superconducting magnet, the superconducting magnet includes a vacuum container 200, a cryogenic device 300, a superconducting coil 400 and any one of the above-mentioned conductive components 100. The cryogenic device 300 is arranged in the vacuum container 200. The superconducting coil 400 is arranged in the cryogenic device 300. The superconducting coil 400 is used to generate a magnetic field after power is turned on. A coolant such as liquid helium is contained in the cryogenic device 300, and the superconducting coil 400 is immersed in the coolant. The inside of the vacuum container 200 maintains a vacuum state to reduce gas heat conduction and convection. The superconducting magnet also includes a heat shield 500, for example. The heat shield 500 is located between the cryogenic device 300 and the vacuum container 200, and is used to prevent heat radiation from the outside of the heat shield 500 from reaching the cryogenic device 300. The two ends of the negative electrode tube 10 of the conductive component 100 are respectively connected to the vacuum container 200 and the cryogenic device 300 to connect the outside of the vacuum container 200 and the inside of the cryogenic device 300. The positive tube 20 can be conductively connected to the superconducting coil 400 and is used to connect the positive pole of the power supply. The conductive component of the superconducting magnet has a detachable structure for connecting units, which is convenient for processing, helps to save processing costs, and is convenient for later maintenance.

[0081] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0082] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present utility model. They are not intended to limit the scope of protection of the present utility model. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present utility model, such as combination, division or repetition of features, should be included in the scope of protection of the present utility model.

Claims

1. A conductive component of a superconducting magnet, characterized in that include: a negative electrode tube (10); a positive electrode tube (20), which passes through the tube cavity of the negative electrode tube (10) and is arranged separately from the negative electrode tube (10); and A connecting unit (30) connects the positive electrode tube (20) and the negative electrode tube (10) in an insulated and heat-conductive manner and fixes the relative position of the positive electrode tube (20) and the negative electrode tube (10), the connecting unit (30) comprising: a first cooling unit (31), which is connected to the negative electrode tube (10) and is used to be thermally connected to a cold source, and A second cooling unit (32) is connected to the positive electrode tube (20) and is detachably connected to the first cooling unit (31); the positive electrode tube (20) and the negative electrode tube (10) are detachable from each other via the connecting unit (30).

2. The conductive component of the superconducting magnet according to claim 1, characterized in that: The first cooling unit (31) and the second cooling unit (32) can be connected in a heat-conductive manner, and the connecting unit (30) further comprises an insulating unit, the insulating unit being arranged between the first cooling unit (31) and the second cooling unit (32) to achieve electrical insulation between the first cooling unit (31) and the second cooling unit (32), and / or being arranged between the positive tube (20) and the second cooling unit (32) to achieve electrical insulation between the positive tube (20) and the second cooling unit (32).

3. The conductive component of the superconducting magnet according to claim 2, characterized in that: The connecting unit (30) further comprises a connecting member (35), wherein the connecting member (35) is passed through one of the first cooling unit (31) and the second cooling unit (32) and is connected to the other one.

4. The conductive component of the superconducting magnet according to claim 2, characterized in that: The negative electrode tube (10) comprises an upper tube portion (11) and a lower tube portion (12) which are separately arranged along the length direction (L) thereof, and the first cooling unit (31) connects the opposite ends of the upper tube portion (11) and the lower tube portion (12) along the length direction (L) and closes the gap between the upper tube portion (11) and the lower tube portion (12).

5. The conductive component of the superconducting magnet according to claim 2, characterized in that: The first cooling unit (31) comprises an inner cooling body (311) and an outer cooling body (312), the inner cooling body (311) and the outer cooling body (312) being respectively arranged on the inner and outer sides of the tube wall of the negative electrode tube (10) and arranged opposite to each other along the wall thickness direction of the tube wall, the outer cooling body (312) being used for heat-conductingly connecting to a cold source, and the second cooling unit (32) being detachably connected to the inner cooling body (311).

6. The conductive component of the superconducting magnet according to claim 2, characterized in that: The second cooling unit (32) is a hoop and surrounds the positive tube (20); the insulating unit comprises an insulating sleeve (33); the insulating sleeve (33) is sandwiched between the second cooling unit (32) and the positive tube (20) to achieve electrical insulation between the second cooling unit (32) and the positive tube (20).

7. The conductive component of the superconducting magnet according to claim 3, characterized in that: The first cooling unit (31) has a first flat plate portion (315) perpendicular to the length direction (L) of the negative electrode tube (10); the second cooling unit (32) has a second flat plate portion (325) perpendicular to the length direction (L) of the negative electrode tube (10); the connecting member (35) is arranged along the length direction (L) through one of the first flat plate portion (315) and the second flat plate portion (325) and is threadedly connected to the other; the insulating unit comprises an insulating gasket (34) sandwiched between the first flat plate portion (315) and the second flat plate portion (325) to achieve electrical insulation between the first flat plate portion (315) and the second flat plate portion (325).

8. The conductive component of the superconducting magnet according to claim 3, characterized in that: The connection unit (30) further comprises an insulating sleeve (36), which is sleeved on the connection piece (35) and located between the connection piece (35) and a structure passed through by the connection piece (35) and not threadedly connected, so as to achieve electrical insulation between the connection piece (35) and the structure.

9. The conductive component of the superconducting magnet according to claim 8, characterized in that: The positive electrode tube (20) and / or the negative electrode tube (10) are made of stainless steel; and / or The first cooling unit (31) and / or the second cooling unit (32) are made of copper; and / or The material of the insulating unit and / or the insulating sleeve (36) is a combination of one or more of polyester, polyimide, polytetrafluoroethylene, nylon, fiberglass, rubber and ceramic.

10. A superconducting magnet, characterized in that include: a vacuum container (200); A low temperature device (300) disposed in the vacuum container (200); a superconducting coil (400) disposed in the cryogenic device (300); and A conductive component according to any one of claims 1 to 9, wherein two ends of the negative electrode tube (10) are respectively connected to the vacuum container (200) and the cryogenic device (300) to communicate the outside of the vacuum container (200) and the inside of the cryogenic device (300), and the positive electrode tube (20) can be conductively connected to the superconducting coil (400) and is used to connect the positive electrode of the power supply.

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