Superconducting Coil Winding Bobbin and Superconducting Magnet

Abstract

The present invention discloses a superconducting coil winding bobbin and a superconducting magnet. The superconducting coil winding bobbin includes a body portion and a heat conduction component. The body portion is provided with an installation chamber and a containing chamber that are separated from each other. The containing chamber surrounds the installation chamber. The installation chamber is used to accommodate the superconducting coil, and the containing chamber is used to accommodate the coolant. A part of the heat conduction component is used to extend into the installation chamber and is used to be in thermal contact with the superconducting coil, and another part is used to extend into the containing chamber and is used to be in thermal contact with the coolant, so that the heat conduction component can perform heat transfer between the coolant and the superconducting coil and realize the cooling of the superconducting coil without the coolant directly contacting the superconducting coil. The superconducting coil winding bobbin and the superconducting magnet of the present invention are used to realize the cooling of the superconducting coil by the coolant, simplify the structures of the superconducting coil winding bobbin and the superconducting coil, improve the refrigeration effect of the superconducting coil, and are efficient and convenient for maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting applications, and particularly to a superconducting coil winding cylinder and a superconducting magnet. Background Art

[0002] A superconducting magnet is an electromagnet widely used in fields such as electric power, transportation, and medical treatment. A superconducting magnet is a core component of equipment such as high-energy particle accelerators and MRI (Magnetic Resonance Imaging). A superconducting magnet mainly includes a superconducting coil, a support system, a suspension system, and a cooling system. Among them, the support system is generally a winding cylinder, and the support system is used to counteract the electromagnetic force of the superconducting coil and to define the superconducting coil to provide a uniform magnetic field during use. The cooling system is used to cool the superconducting coil. When the temperature, current, and magnetic field strength reach a certain level, the superconducting coil enters a superconducting state.

[0003] The cooling system of the superconducting magnet includes a liquid helium cavity located outside the support system and various connecting devices for connecting the liquid helium cavity and the support system, so that the cooling system can cool the superconducting coil in the support system through liquid helium. The existing connection method between the cooling system and the support system is relatively cumbersome, and the structure of the cooling system is also relatively complex, resulting in higher processing difficulty and cost of the superconducting magnet, which is not conducive to maintenance; moreover, due to the relatively long connection pipeline path between the liquid helium cavity and the support system in the cooling system, the cooling efficiency of the cooling system for the superconducting coil is also reduced. Summary of the Invention

[0004] The purpose of the present invention is to provide a superconducting coil winding cylinder and a superconducting magnet, which are used to realize the cooling of the superconducting coil by a coolant, simplify the structures of the superconducting coil winding cylinder and the superconducting magnet, improve the refrigeration effect of the superconducting coil, and are efficient and convenient for maintenance.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A superconducting coil winding cylinder includes:

[0007] A body part provided with an installation chamber and a accommodation chamber which are separated from each other. The accommodation chamber surrounds the installation chamber. The installation chamber is used to accommodate the superconducting coil and not for accommodating the coolant, and the accommodation chamber is used to accommodate the coolant and not for accommodating the superconducting coil;

[0008] A heat conduction component, a part of which is used to extend into the installation chamber and be in thermal contact with the superconducting coil, and another part is used to extend into the accommodation chamber and be in thermal contact with the coolant, so that the heat conduction component can transfer heat between the coolant and the superconducting coil and realize the cooling of the superconducting coil without the coolant directly contacting the superconducting coil;

[0009] At least one barrier plate and at least one partition plate for dividing the accommodation chamber into a plurality of interconnected partition chambers; the barrier plate and the partition plate are jointly used to divide the accommodation chamber when leakage occurs in a certain partition chamber, and the barrier plate is used to seal the partition chamber where leakage occurs to prevent the adjacent partition chambers from communicating with the partition chamber where leakage occurs.

[0010] Preferably, the heat conduction assembly includes an accommodation chamber cover plate and a cold connection cover plate; the accommodation chamber cover plate is arranged at the opening of the accommodation chamber and is used to block the opening of the accommodation chamber, and the accommodation chamber cover plate is used for thermal contact with the coolant; a part of the cold connection cover plate is in thermal contact with the accommodation chamber cover plate, and the other end of the cold connection cover plate extends into the installation chamber and is in thermal contact with the superconducting coil.

[0011] Preferably, the cold connection cover plate includes a first end face, an outer side face connected to the outside of the first end face, and an inner side face connected to the inside of the first end face. The first end face is used to contact the second end face of the superconducting coil, the inner side face is used to contact the inner surface of the superconducting coil, and the outer side face is used to contact the accommodation chamber cover plate;

[0012] And / or, the body part is made of stainless steel, and the accommodation chamber cover plate and the cold connection cover plate are made of copper respectively.

[0013] Preferably, there are a pair of cold connection cover plates. The pair of cold connection cover plates are located at opposite ends of the installation chamber, and each cold connection cover plate is respectively used for thermal contact with the superconducting coil;

[0014] And / or, the first end face is parallel to the second end face, the inner side face is parallel to the inner surface, and the outer side face is parallel to the accommodation chamber cover plate.

[0015] Preferably, the partition plate is arranged in the accommodation chamber and is used to divide the accommodation chamber into a plurality of partition chambers; the partition plate is provided with diversion holes, and the partition chambers on adjacent sides of the partition plate are communicated through the diversion holes.

[0016] Preferably, there are a plurality of accommodation chamber cover plates. The opposite sides of each accommodation chamber cover plate are respectively sealed and connected with the partition plates, and the accommodation chamber cover plate and the corresponding pair of partition plates surround the outer periphery of the partition chamber.

[0017] Preferably, the accommodation chamber cover plate forms weld seams with the body part and the corresponding pair of partition plates respectively, and the accommodation chamber cover plate is welded and sealed with the body part and the partition plates respectively.

[0018] Preferably, a plurality of connection grooves communicating with the accommodation chamber are provided on the body portion, and the connection grooves are used for installing and positioning the partition plate and / or the barrier plate.

[0019] Preferably, each of the partition chambers is respectively used for connecting a liquid level sensor so that the liquid level sensor detects the liquid level in the corresponding partition chamber, and at least some of the partition chambers have different heights.

[0020] Preferably, a protective sleeve is connected to the accommodation chamber cover plate, the protective sleeve is provided with a sealing hole, and the liquid level sensor penetrates into the sealing hole and extends into the partition chamber.

[0021] Preferably, a stepped portion is further provided on the body portion, the stepped portion is located at the end of the installation chamber, and the stepped portion is used for supporting and positioning the superconducting coil.

[0022] A superconducting magnet, comprising:

[0023] The superconducting coil winding cylinder of any one of the above;

[0024] A superconducting coil, installed in the installation chamber of the superconducting coil winding cylinder;

[0025] Coolant, accommodated in the accommodation chamber of the superconducting coil winding cylinder, and the coolant performs heat transfer with the superconducting coil through the heat conduction component of the superconducting coil winding cylinder.

[0026] Compared with the prior art, the beneficial effects of the present invention at least include:

[0027] By providing an accommodation chamber on the body portion of the superconducting coil winding cylinder for accommodating the coolant, there is no need to provide an additional refrigeration system to accommodate the coolant; and, by adopting a heat conduction component, the coolant performs heat transfer with the superconducting coil and cools the superconducting coil, and there is no need to provide a connection structure between the additional refrigeration system and the superconducting coil, that is, the connection structure of the superconducting coil winding cylinder and the superconducting magnet is simplified; the extension path of the heat conduction component is short, the heat transfer effect between the coolant and the superconducting coil is enhanced, and the refrigeration effect of the coolant on the superconducting coil is improved. By providing at least one barrier plate and at least one partition plate for dividing the accommodation chamber into a plurality of interconnected partition chambers; the barrier plate divides the accommodation chamber when a certain partition chamber leaks, and the barrier plate seals and divides the leaking partition chamber to prevent the adjacent partition chamber from communicating with the leaking partition chamber, greatly prolonging the service time of the superconducting magnet, and the maintenance is convenient, efficient and low in cost. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the superconducting coil winding cylinder of the embodiment of the present invention;

[0029] Figure 2 is an exploded view of the superconducting coil winding cylinder and the superconducting coil according to an embodiment of the present invention;

[0030] Figure 3 is a partial structural view of the superconducting coil winding cylinder according to an embodiment of the present invention;

[0031] Figure 4 is a partial structural view of the superconducting coil winding cylinder when a partition board is adopted according to an embodiment of the present invention;

[0032] Figure 5 is a structural view of the cold connection cover plate according to an embodiment of the present invention;

[0033] Figure 6 is a structural view of the main body part according to an embodiment of the present invention.

[0034] In the figure: 100, superconducting coil winding cylinder; 1, main body part; 11, installation chamber; 12, accommodation chamber; 121, partition chamber; 13, connection groove; 14, step part; 2, heat conduction component; 21, accommodation chamber cover plate; 22, cold connection cover plate; 221, first end face; 222, outer side face; 223, inner side face; 224, contact plate; 3, partition plate; 31, diversion hole; 4, barrier plate; 5, liquid level sensor; 6, infusion tube; 200, superconducting coil; 201, second end face; 202, inner surface. Detailed implementation manners

[0035] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be more complete and comprehensive, and the concept of the example embodiments will be fully conveyed to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus their repeated description will be omitted.

[0036] The words expressing positions and directions described in the present invention are all illustrated by taking the accompanying drawings as examples, but can be changed according to needs, and all the changes made are included in the protection scope of the present invention.

[0037] As Figure 1 and Figure 2 shown, the present invention provides a superconducting coil winding cylinder 100, which includes a main body part 1 and a heat conduction component 2. Among them, the main body part 1 is used to install the coolant and the superconducting coil 200, and the heat conduction component 2 is used to realize the heat transfer between the coolant and the superconducting coil 200, so that the coolant can cool the superconducting coil 200. The coolant can specifically be liquid helium.

[0038] Referring to Figure 6, the main body part 1 is provided with a mutually separated installation chamber 11 and a containing chamber 12. The installation chamber 11 can be arranged inside the main body part 1, and the installation chamber 11 is used for accommodating the superconducting coil 200. Specifically, the installation chamber 11 can penetrate the main body part 1 along the axial direction of the main body part 1, and the axis of the installation chamber 11 can be coaxial with the axis of the main body part 1. Among them, the main body part 1 can be prepared from stainless steel material or other materials with low magnetic permeability, so that the main body part 1 can be used in a strong magnetic environment.

[0039] Referring to Figure 2 and 6 , to realize the positioning and support of the superconducting coil 200 in the installation chamber 11, the main body part 1 can be provided with a stepped part 14. The stepped part 14 is located at the end of the installation chamber 11. Specifically, the stepped part 14 is located at the end of the installation chamber 11 along the axis of the installation chamber 11. For example, the stepped part 14 is an annular structure protruding from the end of the outer contour of the installation chamber 11 towards the inside of the main body part 1. Among them, a stepped part 14 is respectively arranged at the two opposite ends of the installation chamber 11 along its axis. When the superconducting coil 200 is installed in the installation chamber 11, the superconducting coil 200 is located between the two stepped parts 14. And the two second end faces 201 of the superconducting coil 200 along the axis of the superconducting coil 200 are respectively abutted against the stepped part 14, so that the superconducting coil 200 is restricted in the installation chamber 11 and remains fixed.

[0040] The containing chamber 12 is used for containing the coolant. The containing chamber 12 can be a groove formed by recessing from the outer surface of the main body part 1 along the direction perpendicular to the axial direction of the main body part 1. For example, the containing chamber 12 is an annular groove formed on the outer surface of the main body part 1. Among them, the containing chamber 12 can be recessed towards the installation chamber 11. Along the recessed direction of the containing chamber 12, the wall thickness between the containing chamber 12 and the installation chamber 11 is relatively thin. The coolant located in the containing chamber 12 can cool the superconducting coil 200 located in the installation chamber 11 through the wall between the containing chamber 12 and the installation chamber 11; that is, the coolant can conduct heat through the main body part 1 and the heat conduction component 2 to realize the cooling of the superconducting coil 200. The coolant can mainly conduct heat through the heat conduction component 2.

[0041] A part of the heat conduction component 2 is used to extend into the installation chamber 11 and is used to be in thermal contact with the superconducting coil 200, that is, a part of the heat conduction component 2 can be in direct or indirect contact with the superconducting coil 200 and achieve the mutual transfer of heat; another part of the heat conduction component 2 is used to extend into the accommodation chamber 12 and is used to be in thermal contact with the coolant, that is, another part of the heat conduction component 2 can be in direct or indirect contact with the coolant and achieve the mutual transfer of heat. Therefore, the heat conduction component 2 can conduct heat transfer between the coolant and the superconducting coil 200, so that the coolant can cool the superconducting coil 200, and further enable the superconducting coil 200 to reach the superconducting temperature. Among them, the heat conduction component 2 can specifically be in direct contact with the superconducting coil 200 and the coolant respectively.

[0042] By providing the installation chamber 11 and the accommodation chamber 12 on the main body part 1, the superconducting coil winding cylinder 100 can not only be used to support the superconducting coil 200, but also be used to accommodate the coolant, without the need to provide additional components for accommodating the coolant. By providing the heat conduction component 2 that can respectively extend into the installation chamber 11 and the accommodation chamber 12, the heat conduction component 2 can conduct heat transfer with the coolant and the superconducting coil 200 respectively in a contact manner, so that the coolant can conduct heat transfer to the superconducting coil 200 through the heat conduction component 2, without the need to provide an additional refrigeration system with coolant to provide a cold source for the superconducting coil 200, and there is no need for the coolant to be in direct contact with the superconducting coil 200; the connection structure between the superconducting coil 200 and the coolant in this application is also relatively simple. Moreover, the heat conduction component 2 only needs to extend between the accommodation chamber 12 and the installation chamber 11 of the main body part 1, the extension length of the heat conduction component 2 is short, and the heat transfer path between the coolant and the superconducting coil 200 is also short, which can improve the cooling efficiency of the coolant for the superconducting coil 200.

[0043] Refer to Figure 1, the heat conduction component 2 may include a cavity cover plate 21 and a cold connection cover plate 22. The cavity cover plate 21 may be disposed at the opening of the cavity chamber 12, and the shape of the cavity cover plate 21 is adapted to the shape of the opening of the cavity chamber 12. For example, when the cavity chamber 12 is an annular groove, the opening of the cavity chamber 12 is an annular opening, and the cavity cover plate 21 may be an arc-shaped plate or an annular plate, and the radius of the cavity cover plate 21 is the same as or close to the radius of the annular opening of the cavity chamber 12. Among them, when the cavity cover plate 21 is an annular plate, the shape of the cavity cover plate 21 is adapted to the opening shape of the cavity chamber 12, so that when the cavity cover plate 21 is installed at the opening of the cavity chamber 12, the opening of the cavity chamber 12 can be blocked; when the cavity cover plate 21 is an annular plate, a plurality of cavity cover plates 21 may be provided, and a plurality of cavity cover plates 21 surround to form an annular cavity cover plate group, and the shape of the cavity cover plate group is adapted to the opening shape of the cavity chamber 12, so that when a plurality of cavity cover plates 21 are installed at the opening of the cavity chamber 12, the cavity cover plate group formed by the plurality of cavity cover plates 21 can block the opening of the cavity chamber 12. When the cavity chamber 12 is filled with a coolant, the cavity cover plate 21 for blocking the cavity chamber 12 will contact the coolant to achieve heat transfer with the coolant.

[0044] A part of the cold connection cover plate 22 may be in thermal contact with the cavity cover plate 21 to achieve heat transfer with the cavity cover plate 21; the other end of the cold connection cover plate 22 may extend into the installation chamber 11 and be in thermal contact with the superconducting coil 200. Therefore, the coolant can indirectly contact the superconducting coil 200 through the cavity cover plate 21 and the cold connection cover plate 22 and cool the superconducting coil 200. Among them, to improve the heat conduction efficiency of the cold connection cover plate 22 and the cavity cover plate 21, the cold connection cover plate 22 and the cavity cover plate 21 are respectively made of materials with relatively good thermal conductivity. For example, the cold connection cover plate 22 and the cavity cover plate 21 are respectively made of copper.

[0045] Refer to Figure 5 , in some specific embodiments, the cold connection cover plate 22 includes an integrally formed first end face 221, an inner side face 223, and an outer side face 222. The outer side of the first end face 221 is connected to the outer side face 222, and the inner side of the first end face 221 is connected to the inner side face 223. The first end face 221 of the cold connection cover plate 22 is used to contact the second end face 201 of the superconducting coil 200. As a preferred method, the first end face 221 is parallel or approximately parallel to the second end face 201 of the superconducting coil 200, so that the first end face 221 can be completely or substantially completely attached to the second end face 201 of the superconducting coil 200, increasing the contact area between the cold connection cover plate 22 and the superconducting coil 200, and further increasing the heat transfer effect between the cold connection cover plate 22 and the superconducting coil 200.

[0046] The inner side surface 223 of the cold connection cover plate 22 can be used to contact the inner surface 202 of the superconducting coil 200. As a preferred mode, the inner side surface 223 of the cold connection cover plate 22 is parallel or approximately parallel to the inner surface 202 of the superconducting coil 200, so that the inner side surface 223 of the cold connection cover plate 22 can be completely or substantially completely attached to the inner surface 202 of the superconducting coil 200, increasing the contact area between the cold connection cover plate 22 and the superconducting coil 200, and further increasing the heat transfer effect between the cold connection cover plate 22 and the superconducting coil 200. Among them, the inner side surface 223 of the cold connection cover plate 22 can be specifically formed by extending along the axis direction of the body portion 1 from the first end surface 221; the inner side surface 223 of the cold connection cover plate 22 and the inner surface 202 of the superconducting coil 200 can both be cylindrical surfaces.

[0047] The outer side surface 222 of the cold connection cover plate 22 can be used to contact the accommodation cavity cover plate 21 and perform heat transfer with the accommodation cavity cover plate 21. The outer side surface 222 of the cold connection cover plate 22 is parallel or approximately parallel to the accommodation cavity cover plate 21, so that the outer side surface 222 of the cold connection cover plate 22 can be completely or substantially completely attached to the accommodation cavity cover plate 21, increasing the contact area between the cold connection cover plate 22 and the accommodation cavity cover plate 21, and further increasing the heat transfer effect between the cold connection cover plate 22 and the accommodation cavity cover plate 21. Among them, the cold connection cover plate 22 can include a plurality of contact plates 224, and the plurality of contact plates 224 are distributed at intervals along the circumferential direction of the cold connection cover plate 22, and the outer side surfaces of the plurality of contact plates 224 together form the outer side surface 222 of the cold connection cover plate 22. The number of the contact plates 224 can be the same as and correspond one by one to the number of the accommodation cavity cover plates 21. Each contact plate 224 is used to contact a corresponding accommodation cavity cover plate 21, and the contact plate 224 and the corresponding accommodation cavity cover plate 21 can be arranged in the center.

[0048] In some specific embodiments, the superconducting coil 200 has two opposite second end faces 201 along the axial direction of the superconducting coil 200, and the superconducting coil 200 can form opposite first and second ends along the axial direction of the superconducting coil 200. A pair of cold connection covers 22 can be provided. The pair of cold connection covers 22 can be distributed at opposite ends of the installation chamber 11 and are respectively used for thermally contacting the superconducting coil 200 and the accommodation chamber cover 21. Specifically, one cold connection cover 22 can be located at the first end of the superconducting coil 200, and the first end face 221 of the cold connection cover 22 is used for contacting the second end face 201 of the superconducting coil 200 at the first end. The inner side surface 223 of the cold connection cover 22 is used for contacting the part of the inner surface 202 of the superconducting coil 200 adjacent to the first end of the superconducting coil 200. The outer surface of the cold connection cover 22 is used for contacting the part of the corresponding accommodation chamber cover 21 adjacent to the first end of the superconducting coil 200. Correspondingly, the other cold connection cover 22 can be located at the second end of the superconducting coil 200, and the first end face 221 of the other cold connection cover 22 is used for contacting the second end face 201 of the superconducting coil 200 at the second end. The inner side surface 223 of the other cold connection cover 22 is used for contacting the part of the inner surface 202 of the superconducting coil 200 adjacent to the second end of the superconducting coil 200. The outer surface of the other cold connection cover 22 is used for contacting the part of the corresponding accommodation chamber cover 21 adjacent to the second end of the superconducting coil 200. Refer to Figure 2 , the inner side surface 223 can be the outer surface of a cylinder.

[0049] Refer to Figure 4, in some specific embodiments, the superconducting coil winding cylinder 100 further includes at least one partition plate 3. The partition plate 3 is disposed in the accommodation chamber 12 and can divide the accommodation chamber 12 into a plurality of partition chambers 121. As a preferred mode, there are a plurality of partition plates 3, and the plurality of partition plates 3 are uniformly distributed along the circumferential direction of the accommodation chamber 12 to divide the accommodation chamber 12 into a plurality of partition chambers 121 with equal volumes. Specifically, the partition plate 3 can be connected to the accommodation chamber cover plate 21. For example, one partition plate 3 is connected to each of the opposite sides of each accommodation chamber cover plate 21, so that the accommodation chamber cover plate 21, the two partition plates 3 connected to the accommodation chamber cover plate 21, and a part of the wall forming the accommodation chamber 12 enclose a partition chamber 121. Among them, the partition plate 3 is hermetically connected to the accommodation chamber cover plate 21, and the accommodation chamber cover plate 21 is hermetically connected to the body portion 1 to prevent the coolant located in the partition chamber 121 from leaking; for example, when the partition plate 3 and the accommodation chamber cover plate 21 are installed at the accommodation chamber 12, fillet welds are respectively formed between the partition plate 3 and the accommodation chamber cover plate 21, and between the accommodation chamber cover plate 21 and the body portion 1, so that the partition plate 3 and the accommodation chamber cover plate 21, and the accommodation chamber cover plate 21 and the body portion 1 can be fixedly welded at the fillet welds, thereby sealing the connection between the partition plate 3 and the accommodation chamber cover plate 21 and the connection between the accommodation chamber cover plate 21 and the body portion 1, and further preventing the coolant in the partition chamber 121 from overflowing.

[0050] The partition plate 3 may further be provided with a diversion hole 31, and the partition chambers 121 on the adjacent sides of the partition plate 3 can be communicated through the diversion hole 31 of the partition plate 3; when there are a plurality of partition plates 3, each partition plate 3 may be respectively provided with a diversion hole 31, and the plurality of partition chambers 121 are sequentially communicated through the plurality of diversion holes 31. Among them, the diversion hole 31 may be a kidney-shaped hole, and the diversion hole 31 penetrates the partition plate 3 along the thickness direction of the partition plate 3.

[0051] In some specific embodiments, each partition chamber 121 can be respectively used to connect a liquid level sensor 5, so that the liquid level sensor 5 can detect the liquid level in the corresponding partition chamber 121. During use, the axis of the superconducting coil winding cylinder 100 can be placed horizontally, and the plurality of partition chambers 121 are arranged from the top of the superconducting coil winding cylinder 100 to the bottom of the superconducting coil winding cylinder 100, so that at least some of the partition chambers 121 are at different heights.

[0052] When one of the multiple partition cavities 121 leaks, the coolant will flow out from the leakage point of the partition cavity 121 and stop leaking when the liquid level of the coolant is flush with the leakage point of the partition cavity 121. At this time, the liquid level sensor 5 corresponding to the leaking partition cavity 121 detects a decrease in the liquid level in the partition cavity 121 and sends a signal. When only one liquid level sensor 5 sends a signal, for example, when the liquid level sensor 5 corresponding to the partition cavity 121 at the highest position sends a signal, it is determined that the partition cavity 121 corresponding to the liquid level sensor 5 leaks. When multiple liquid level sensors 5 send signals, it is determined that the partition cavity 121 corresponding to the liquid level sensor 5 with the lowest height among the multiple liquid level sensors 5 leaks. When multiple liquid level sensors 5 send signals and there are two or more liquid level sensors 5 with the lowest height among the multiple liquid level sensors 5, the superconducting coil winding cylinder 100 can be rotated so that two or more partition cavities 121 corresponding to the liquid level sensors 5 with the lowest height are at different heights and form a height difference, thereby facilitating the judgment and determination of the leaking partition cavity 121 among the two or more partition cavities 121.

[0053] By adopting the method of cooperating with multiple liquid level sensors 5, the leakage of the partition cavity 121 can be detected and judged. When some of the liquid level sensors 5 are damaged, the damaged liquid level sensors 5 can be replaced. Compared with the method of using a liquid level gauge for detection, the liquid level gauge needs to extend from the upper end to the lower end of the self - containing chamber 12 and the liquid level gauge is an integral structure. When a certain part of the liquid level gauge is damaged, it is not convenient to repair and replace the liquid level gauge and the repair and replacement cost of the liquid level gauge is relatively high. The present application adopts the method of cooperating with multiple liquid level sensors 5, which is convenient for maintenance and has a low maintenance cost.

[0054] In some specific embodiments, the liquid level sensor 5 can be detachably installed on the accommodation cavity cover plate 21. Specifically, the accommodation cavity cover plate 21 is provided with a protective sleeve that can penetrate the accommodation cavity cover plate 21. The protective sleeve can be fixed to the accommodation cavity cover plate 21 by interference fit, bonding, welding, etc. The protective sleeve can be provided with a sealing hole, and the sealing hole can be used to install the liquid level sensor 5 so that the detection end of the liquid level sensor 5 can extend through the sealing hole to the detection position and detect the liquid level of the partition cavity 121 corresponding to the accommodation cavity cover plate 21.

[0055] Among them, the protective sleeve can be made of flexible materials such as rubber. The protective sleeve can be provided with a plurality of elastic flap bodies that abut against each other to seal its sealing hole. When the liquid level sensor 5 needs to be installed, the liquid level sensor 5 pierces through the flap body of the protective sleeve and penetrates into the partition cavity 121. When the liquid level sensor 5 needs to be disassembled, the liquid level sensor 5 separates from the flap body, and the flap body will reset by its elasticity and seal the sealing hole, thereby avoiding the coolant in the partition cavity 121 from leaking from the installation position of the liquid level sensor 5 when the liquid level sensor 5 is removed and replaced. Alternatively, the liquid level sensor 5 can be a non-contact liquid level sensor 5, and the sealing hole of the protective sleeve is a hole that does not penetrate the protective sleeve, and the sealing hole is not communicated with the accommodating cavity 12, thereby avoiding the coolant in the partition cavity 121 from leaking from the installation position of the liquid level sensor 5 when the liquid level sensor 5 is removed and replaced.

[0056] Referring to Figure 4 , when it is determined that a certain partition cavity 121 leaks, in order to prevent the leaking partition cavity 121 from affecting the coolant in other partition cavities 121, the partition plate 3 used to enclose the leaking partition cavity 121 can be replaced with a barrier plate 4. The barrier plate 4 is used to seal and separate adjacent partition cavities 121, so that the leaking partition cavity 121 is sealed and separated from its adjacent partition cavity 121. At this time, the coolant in the non-leaking partition cavity 121 can continue to cool the superconducting coil 200. When a traditional liquid helium cavity leaks, all the coolant can only be emptied, and the entire liquid helium cavity needs to be leak-tested. It is very difficult to determine the leak location, and the repair is a whole repair, with a complex repair process and a long repair time.

[0057] In the embodiment of the present invention, when a certain partition cavity 121 of the superconducting coil winding cylinder 100 leaks, by using the barrier plate 4 to seal the leaking partition cavity 121, the coolant in the partition cavity 121 adjacent to the leaking partition cavity 121 will not leak together, and the superconducting coil winding cylinder 100 and the superconducting magnet can continue to work, greatly extending the service time. After the superconducting coil winding cylinder 100 and the superconducting magnet are used up, the leaking partition cavity 121 can be repaired, and the repair is convenient, efficient and has a low repair cost. Among them, the barrier plate 4 has the same contour as the partition plate 3, and the barrier plate 4 is not provided with a diversion hole 31.

[0058] In some specific embodiments, when the partition plate 3 needs to be replaced with the barrier plate 4, the weld at the welding joint of the partition plate 3 to be replaced and the accommodating cavity cover plate 21 can be polished so that the partition plate 3 can be separated from the accommodating cavity cover plate 21. Then, the barrier plate 4 is installed in the original position of the partition plate 3, and the barrier plate 4 is welded to the accommodating cavity cover plate 21, thereby realizing the replacement of the partition plate 3 with the barrier plate 4.

[0059] When the superconducting coil bobbin 100 starts to work initially, multiple partition cavities 121 are separated by partition plates 3; when a certain partition cavity 121 leaks, the barrier plate 4 and the partition plate 3 are jointly used to separate the accommodation chamber 12. Specifically, the leaking partition cavity 121 is blocked by the barrier plate 4 from the adjacent partition cavity 121, while the non-leaking adjacent partition cavities 121 are separated by the partition plate 3.

[0060] In some specific embodiments, the body portion 1 may further be provided with connection grooves 13. The connection grooves 13 may be recessed from the wall forming the accommodation chamber 12, and the connection grooves 13 communicate with the accommodation chamber 12. The width of the connection grooves 13 may be the same as the thickness of the partition plates 3 and the barrier plates 4, and the number of the connection grooves 13 may be the same as the sum of the numbers of the partition plates 3 and the barrier plates 4. Each connection groove 13 corresponds to a partition plate 3 or a barrier plate 4. When it is necessary to install the partition plate 3 or the barrier plate 4, one end of the partition plate 3 and the barrier plate 4 may be inserted into the connection groove 13, and then slide along the connection groove 13 into the accommodation chamber 12, so that the connection grooves 13 can position the installation positions of the barrier plate 4 and the partition plate 3 and facilitate the installation of the barrier plate 4 and the partition plate 3.

[0061] In some specific embodiments, to facilitate filling the coolant into the accommodation chamber 12 of the body portion 1, the body portion 1 may be connected with an infusion tube 6. One end of the infusion tube 6 extends to the outside of the body portion 1 and is used to receive the external coolant. Moreover, the infusion tube 6 extends along the circumferential direction of the accommodation chamber 12 in the accommodation chamber 12, and at least half of the space of the accommodation chamber 12 houses the infusion tube 6. When it is necessary to fill the coolant into the accommodation chamber 12, the exposed end of the infusion tube 6 outside the body portion 1 is at or near the highest point of the infusion tube 6. Then the coolant flows into the accommodation chamber 12 through the infusion tube 6. At this time, the accommodation chamber 12 is separated by the partition plates 3 having diversion holes 31, so that the coolant can be filled in each position of the accommodation chamber 12.

[0062] Refer to Figure 2, the present invention also provides a superconducting magnet, which includes the superconducting coil bobbin 100, the superconducting coil 200, and a coolant for cooling the superconducting coil 200 as described above. The superconducting coil 200 is installed in the installation chamber 11 of the superconducting coil bobbin 100, and the second end face 201 of the superconducting coil 200 can abut against the step portion 14 of the main body portion 1 in the superconducting coil bobbin 100. The coolant is received in the accommodation chamber 12 of the superconducting coil bobbin 100, and the coolant can transfer heat to the superconducting coil 200 through the heat conduction component 2 of the superconducting coil bobbin 100, thereby cooling the superconducting coil 200. In some embodiments, the coolant does not directly contact the superconducting coil 200. By adopting the superconducting coil bobbin 100 as described above, the superconducting magnet does not need to separately provide a cooling system for accommodating the coolant, the structure is relatively simplified, and the cost is also relatively low.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principle and purpose of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A superconducting coil bobbin, characterized in that: include: A main body (1) is provided with a mounting chamber (11) and a receiving chamber (12) which are separated from each other, the receiving chamber (12) surrounds the mounting chamber (11), the mounting chamber (11) is arranged on the inner side of the main body (1), and the mounting chamber (11) is used to receive the superconducting coil (200) but not for receiving the cooling liquid, the receiving chamber (12) is a groove formed by being recessed from the outer surface of the main body (1) along an axial direction perpendicular to the main body (1), and the receiving chamber (12) is used to receive the cooling liquid but not for receiving the superconducting coil; a heat conduction component (2), a portion of which is used to extend to the installation chamber (11) and is used to be in thermal contact with the superconducting coil (200), and another portion of which is used to extend to the accommodation chamber (12) and is used to be in thermal contact with the cooling liquid, so that the heat conduction component (2) can transfer heat between the cooling liquid and the superconducting coil (200) and achieve cooling of the superconducting coil (200) without the cooling liquid directly contacting the superconducting coil (200); At least one baffle plate (4) and at least one partition plate (3) for partitioning the accommodating chamber (12) into a plurality of mutually communicating partition chambers (121); the partition plate (3) is provided with a flow guide hole (31), the partition chambers (121) located on two adjacent sides of the partition plate (3) are communicated through the flow guide hole (31) of the partition plate (3), and the flow guide hole (31) penetrates the partition plate (3) along the thickness direction of the partition plate (3); the baffle plate (4) and the partition plate (3) are used together to partition the accommodating chamber (12) when a leakage occurs in a partition chamber, and the baffle plate (4) is used to seal and separate the partition chamber where the leakage occurs to prevent the adjacent partition chamber from communicating with the partition chamber where the leakage occurs.

2. The superconducting coil bobbin according to claim 1, characterized in that: The heat conduction component (2) comprises a accommodating chamber cover plate (21) and a cold connection cover plate (22); the accommodating chamber cover plate (21) is arranged at the opening of the accommodating chamber (12) and is used to seal the opening of the accommodating chamber (12), and the accommodating chamber cover plate (21) is used to be in thermal contact with the cooling liquid; a portion of the cold connection cover plate (22) is in thermal contact with the accommodating chamber cover plate (21), and the other end of the cold connection cover plate (22) extends into the installation chamber (11) and is in thermal contact with the superconducting coil (200).

3. The superconducting coil bobbin according to claim 2, characterized in that: The cold connection cover plate (22) comprises a first end surface (221), an outer side surface (222) connected to the outer side of the first end surface (221), and an inner side surface (223) connected to the inner side of the first end surface (221), the first end surface (221) being used to contact the second end surface (201) of the superconducting coil (200), the inner side surface (223) being used to contact the inner surface (202) of the superconducting coil (200), and the outer side surface (222) being used to contact the accommodating cavity cover plate (21); And / or, the main body (1) is made of stainless steel, and the accommodating cavity cover plate (21) and the cold connection cover plate (22) are respectively made of copper.

4. The superconducting coil bobbin according to claim 3, characterized in that: A pair of the cold connection cover plates (22) are provided, the pair of the cold connection cover plates (22) being located at opposite ends of the installation chamber (11), and each of the cold connection cover plates (22) is used for thermal contact with the superconducting coil (200); And / or, the first end surface (221) is parallel to the second end surface (201), the inner side surface (223) is parallel to the inner surface (202), and the outer side surface (222) is parallel to the accommodating cavity cover plate (21).

5. The superconducting coil bobbin according to claim 2, characterized in that: The partition plate (3) is arranged in the accommodating chamber (12) and is used to divide the accommodating chamber (12) into a plurality of partition chambers (121).

6. The superconducting coil bobbin according to claim 5, characterized in that: A plurality of the accommodating cavity cover plates (21) are provided, and opposite sides of each accommodating cavity cover plate (21) are respectively sealedly connected to the partition plates (3), and the accommodating cavity cover plates (21) and the corresponding pair of partition plates (3) are arranged around the periphery of the partition cavity (121).

7. The superconducting coil bobbin according to claim 6, characterized in that: The accommodating cavity cover plate (21), the main body portion (1) and the corresponding pair of partition plates (3) are respectively formed with weld seams, and the accommodating cavity cover plate (21), the main body portion (1) and the partition plates (3) are respectively welded and sealed.

8. The superconducting coil bobbin according to claim 1, characterized in that: The main body (1) is provided with a plurality of connection grooves (13) in communication with the accommodating chamber (12), and the connection grooves (13) are used for installing and positioning the partition plate (3) and / or the blocking plate (4).

9. The superconducting coil bobbin according to claim 2, characterized in that: Each of the partition chambers (121) is respectively used to connect to a liquid level sensor (5), so that the liquid level sensor (5) detects the liquid level in the corresponding partition chamber (121), and at least some of the partition chambers (121) have different heights.

10. The superconducting coil bobbin according to claim 9, characterized in that: The accommodating chamber cover plate (21) is connected to a protective sleeve, the protective sleeve is provided with a sealing hole, and the liquid level sensor (5) penetrates into the sealing hole and extends to the separation chamber (121).

11. The superconducting coil bobbin according to claim 1, characterized in that: The main body (1) is further provided with a step portion (14), the step portion (14) is located at the end of the installation chamber (11), and the step portion (14) is used to support and position the superconducting coil (200).

12. A superconducting magnet, characterized in that: include: The superconducting coil bobbin (100) according to any one of claims 1 to 11; A superconducting coil (200) is installed in an installation chamber (11) of the superconducting coil bobbin (100); A cooling liquid is contained in a containing chamber (12) of the superconducting coil bobbin (100), and the cooling liquid conducts heat transfer with the superconducting coil (200) through a heat conduction component (2) of the superconducting coil bobbin (100).

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