Adsorption device for superconducting magnet and superconducting magnet assembly

Abstract

The utility model discloses an adsorption device for a superconducting magnet and a superconducting magnet assembly, and the adsorption device for the superconducting magnet comprises a plurality of pieces of activated carbon cloth, a plurality of heat-conducting fins, a mounting support plate, and a heating member. The multiple pieces of activated carbon cloth are stacked in the thickness direction of the activated carbon cloth and jointly used for adsorbing impurities in the working environment of the superconducting magnet. The heat-conducting fins and the activated carbon cloth are arranged in a staggered and stacked mode, and the heat-conducting fins are used for conducting heat transfer with an external cold source; the multiple pieces of activated carbon cloth and the multiple pieces of heat-conducting fins jointly form an adsorption assembly, and each piece of activated carbon cloth is used for conducting heat with at least one heat-conducting fin; the mounting carrier plate is arranged on one side of the adsorption assembly and abuts against the adsorption assembly. The heating piece is used for heating the activated carbon cloth. The adsorption device and the superconducting magnet assembly are used for improving the adsorption efficiency of impurities in the superconducting magnet environment, simplifying the adsorption process and guaranteeing stable operation of the superconducting magnet.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature superconductivity, in particular to an adsorption device for a superconducting magnet and a superconducting magnet assembly. Background Art

[0002] Superconducting magnets are electromagnetic devices widely used in fields such as MRI (Magnetic Resonance Imaging), magnetic levitation trains, and nuclear magnetic resonance imaging. Superconducting magnets require cooling with liquid helium or liquid nitrogen to maintain their superconducting state. Furthermore, a vacuum must be maintained inside the magnet during operation.

[0003] During the operation of a superconducting magnet, trace gases such as helium and nitrogen, as well as impurities such as water vapor, exist in the environment. These impurities will be adsorbed on the surface of the superconducting magnet, causing the vacuum environment inside the superconducting magnet to deteriorate, which may in turn generate convective heat leakage, causing the performance of the superconducting magnet to deteriorate or even be damaged.

[0004] Existing methods for removing impurities from the operating environment of superconducting magnets include gas cleaning and plasma cleaning, but these cleaning methods are inefficient, costly, and complex. Another existing method for removing impurities from the operating environment of superconducting magnets is adsorption using activated carbon granules. However, when activated carbon granules are squeezed or shaken, they produce fine particles and dust that can contaminate the superconducting magnet. Utility Model Content

[0005] The purpose of the utility model is to provide an adsorption device for a superconducting magnet and a superconducting magnet assembly, which are used to improve the adsorption efficiency of impurities in the superconducting magnet environment, simplify the adsorption process, and ensure the stable operation of the superconducting magnet.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] An adsorption device for a superconducting magnet, comprising:

[0008] A plurality of activated carbon cloths, wherein the plurality of activated carbon cloths are stacked along a thickness direction of the activated carbon cloths and are used together to adsorb impurities in a working environment of a superconducting magnet;

[0009] A plurality of heat conducting sheets, wherein the heat conducting sheets are alternately stacked with the activated carbon cloth, and the heat conducting sheets are used for heat transfer with an external cold source;

[0010] A plurality of the activated carbon cloths and a plurality of the heat conducting sheets together constitute an adsorption assembly, and each activated carbon cloth is used for heat conduction with at least one heat conducting sheet;

[0011] An installation carrier plate, the installation carrier plate is arranged on one side of the adsorption component and abuts against the adsorption component;

[0012] A heating element is used to heat the activated carbon cloth.

[0013] Preferably, the outer contour of the heat conducting sheet is adapted to the outer contour of the activated carbon cloth, and the heat conducting sheet is provided with a plurality of air holes penetrating the heat conducting sheet, and the air holes are used for allowing the impurities to pass through;

[0014] And / or, the specific surface area of ​​the activated carbon cloth is 1000-3000m 2 / g.

[0015] Preferably, the plurality of ventilation holes on each of the heat conducting plates are distributed at equal intervals, and the ventilation holes are long holes extending along the length direction or width direction of the heat conducting plate;

[0016] And / or, the heat conducting sheet is a copper sheet.

[0017] Preferably, the activated carbon cloth is provided with a mounting hole penetrating along the stacking direction of the activated carbon cloth, and a gasket is accommodated in the mounting hole. The gasket is used to abut against the heat conducting sheet to limit the distance between adjacent heat conducting sheets.

[0018] Preferably, each of the activated carbon cloths is provided with a heat conducting sheet at two opposite ends along the stacking direction, and the two opposite ends of the adsorption assembly are respectively provided with the heat conducting sheet.

[0019] Preferably, it also includes a fastener and a mating piece, the fastener includes a head and a rod; the activated carbon cloth and the heat conducting sheet are respectively provided with avoidance holes for avoiding the rod, and the avoidance holes of multiple activated carbon cloths and multiple heat conducting sheets are connected to form an avoidance channel for the rod to pass through; the mating piece is connected to one end of the rod away from the head, and the head and the mating piece are located at opposite ends of the adsorption component and are used to clamp and fix the adsorption component.

[0020] Preferably, the mounting plate is arranged on a side of the adsorption component away from the head, and the fitting is in contact with the side of the mounting plate away from the adsorption component.

[0021] Preferably, it further comprises a temperature detection member, which is fixedly mounted on the mounting carrier and is used to detect the temperature of the activated carbon cloth;

[0022] And / or, the mounting carrier is a copper plate, and the thickness of the mounting carrier is greater than the thickness of the heat conducting plate.

[0023] Preferably, the fastener is provided with an installation cavity, the installation cavity extends along the stacking direction of the activated carbon cloth, the heating element is installed in the installation cavity and is used to heat the activated carbon cloth, and two of the fasteners and the heating element are respectively provided, each of the heating elements is installed in the installation cavity corresponding to the fastener, and the two heating elements are arranged at intervals and are used together to heat the activated carbon cloth.

[0024] A superconducting magnet assembly, comprising:

[0025] superconducting magnets;

[0026] Any one of the above-mentioned adsorption devices is installed on the superconducting magnet to adsorb impurities in the working environment of the superconducting magnet, and the adsorption device includes a mounting plate, and the mounting plate is fixedly installed on the upper middle part of the superconducting magnet;

[0027] And / or, the superconducting magnet includes a vacuum gauge, and the vacuum gauge is used to detect the vacuum degree in the superconducting magnet.

[0028] Compared with the prior art, the beneficial effects of the present invention include at least:

[0029] By using activated carbon cloth to adsorb impurities in the working environment of the superconducting magnet, the adsorption process can be simplified and the operation can be facilitated. The structure of the activated carbon cloth is relatively stable, and it is not easy to produce fine particles and dust when the activated carbon cloth is squeezed or shaken. It can reduce the risk of the superconducting magnet being contaminated by activated carbon particles or dust, and ensure that the superconducting magnet can stably maintain the low temperature conditions required by the superconducting magnet during long-term operation, avoid the adverse effects of temperature fluctuations on the performance of the superconducting magnet, and ensure the stable operation of the superconducting magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the adsorption device of an embodiment of the utility model;

[0031] Figure 2 This is a cross-sectional view of a partial structure of an adsorption device according to an embodiment of the present utility model;

[0032] Figure 3 This is an exploded view of a portion of the structure of the adsorption device according to an embodiment of the present utility model;

[0033] Figure 4 This is a schematic structural diagram of a heat conducting sheet according to an embodiment of the present utility model;

[0034] Figure 5 It is a schematic structural diagram of the activated carbon cloth according to an embodiment of the present invention.

[0035] In the figure: 1. Activated carbon cloth; 11. Mounting hole; 111. Gasket; 12. Avoidance hole; 13. Avoidance channel; 2. Heat conducting plate; 21. Air vent; 3. Fastener; 31. Head; 32. Rod; 33. Mating part; 34. Mounting chamber; 4. Mounting carrier; 5. Temperature detection part; 6. Heating part. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make this disclosure more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0037] The words expressing positions and directions described in this utility model are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of this utility model.

[0038] like Figures 1 to 3 As shown, the present invention provides an adsorption device for a superconducting magnet. This device is used to absorb impurities in the superconducting magnet's operating environment, thereby maintaining the vacuum within the superconducting magnet, reducing convective heat leakage within the superconducting magnet, ensuring stable operation of the superconducting magnet, and improving the performance and service life of the superconducting magnet. The adsorption device includes an activated carbon cloth 1 and a heat conductive sheet 2 connected to the activated carbon cloth 1. It may also include a mounting plate 4.

[0039] The activated carbon cloth 1 can remove impurities from the superconducting magnet's operating environment through physical and chemical adsorption. Specifically, the activated carbon cloth 1 has a highly developed pore structure, resulting in a large specific surface area. Gases flowing through the activated carbon cloth 1 can fully contact the cloth, and the activated carbon cloth 1 can adsorb gas molecules within the pores through van der Waals forces, achieving physical adsorption. Furthermore, the functional groups on the surface of the activated carbon cloth 1 can chemically react with gas molecules to immobilize them, thereby achieving chemical adsorption. When placed in the superconducting magnet's operating environment, the activated carbon cloth 1 can effectively capture and adsorb impurities such as moisture, oxygen, organic volatiles, nitrogen, and helium, preventing or effectively reducing the impact of impurities on the superconducting magnet and ensuring its normal operation. The activated carbon cloth 1 is made of a material compatible with the superconducting magnet and its surrounding environment to prevent interactions between the activated carbon cloth 1 and surrounding substances and the superconducting magnet, which could degrade or damage the superconducting magnet's performance.

[0040] In the present application, multiple activated carbon cloths 1 are provided, and the multiple activated carbon cloths 1 can be stacked along the thickness direction of the activated carbon cloth 1. Gas can flow between the multiple activated carbon cloths 1 so that the multiple activated carbon cloths 1 can be used together to adsorb impurities in the gas. The specific surface area of ​​each activated carbon cloth 1 is 1000-3000m 2 / g, to ensure that the activated carbon cloth 1 can quickly and efficiently absorb impurities such as moisture and gas molecules. The activated carbon cloth 1 can be provided with 100 pieces.

[0041] By using activated carbon cloth 1 to adsorb impurities in the gas, the operation is relatively simple, and there is no need for complex steps such as gas cleaning and plasma cleaning, which simplifies the process of adsorbing impurities. In addition, the structure of the activated carbon cloth 1 is relatively stable. When the activated carbon cloth 1 is squeezed or shaken, it is not easy to produce fine particles and dust, which reduces the risk of the superconducting magnet being contaminated by activated carbon particles or dust, and ensures that the superconducting magnet can stably maintain the low temperature conditions required for the superconducting magnet during long-term operation, avoiding temperature fluctuations from having an adverse effect on the performance of the superconducting magnet, and ensuring the stable operation of the superconducting magnet. In addition, compared with the method of using activated carbon particles, the stacking arrangement of the activated carbon cloth 1 can reduce the volume of the adsorption device, making the structure of the adsorption device more compact and lightweight, and can reduce the space around the superconducting magnet occupied by the adsorption device after it is installed on the superconducting magnet, and can also facilitate the installation and maintenance of the adsorption device. The layered activated carbon cloth 1 can also prevent external gas from penetrating the superconducting magnet, maintaining the vacuum level within the superconducting magnet and ensuring its normal operation. Furthermore, the layered activated carbon cloth 1 can also delay the increase in the vacuum level within the superconducting magnet when a minor leak occurs. A minor leak in a superconducting magnet can have a leak rate of less than or equal to 1.0e-6 mbarL / s.

[0042] Reference Figure 3The thermally conductive sheet 2 is used to make thermal contact with the activated carbon cloth 1 for heat conduction. A plurality of thermally conductive sheets 2 can be provided, and the thermally conductive sheets 2 and the activated carbon cloth 1 are arranged in an alternating manner to form a stacked structure of thermally conductive sheets 2, activated carbon cloth 1, thermally conductive sheets 2, and activated carbon cloth 1. The thermally conductive sheet 2 is made of a material with good thermal conductivity, and the thermally conductive sheet 2 can transfer heat with an external cold source, such as a cold source of a superconducting magnet. The thermally conductive sheet 2 is rapidly cooled by the cold source of the superconducting magnet, and then the thermally conductive sheet 2 cools the activated carbon cloth 1 in thermal contact with the thermally conductive sheet 2. Due to the good thermal conductivity of the thermally conductive sheet 2, the multiple thermally conductive sheets 2 are evenly cooled by the cooling of the superconducting magnet, and the temperatures of the multiple thermally conductive sheets 2 are the same or similar. Therefore, the activated carbon cloth 1 in thermal contact with the thermally conductive sheet 2 can be evenly cooled by the heat transfer of the thermally conductive sheet 2, and the temperatures of the multiple activated carbon cloths 1 are the same or similar. The heat conducting sheet 2 may be a copper sheet, and each activated carbon cloth 1 conducts heat with at least one heat conducting sheet 2 so that each activated carbon cloth 1 can be cooled by the heat transfer of the heat conducting sheet 2 .

[0043] In some specific embodiments, the number of heat-conducting sheets 2 can be one more than that of the activated carbon cloth 1, so that the opposite ends of the adsorption assembly composed of multiple heat-conducting sheets 2 and multiple activated carbon cloths 1 stacked together are heat-conducting sheets 2, and each activated carbon cloth 1 can be provided with a heat-conducting sheet 2 at each opposite end along its stacking direction; that is, each activated carbon cloth 1 can be cooled under the heat conduction action of the two heat-conducting sheets 2, thereby improving the cooling speed and uniformity of the activated carbon cloth 1.

[0044] In some specific embodiments, the outer contour of the thermally conductive sheet 2 is adapted to the outer contour of the activated carbon cloth 1. For example, the outer contour of the thermally conductive sheet 2 is the same or substantially the same as the outer contour of the activated carbon cloth 1, and the thermally conductive sheet 2 and the activated carbon cloth 1 are stacked in a centered manner so that the surface of the thermally conductive sheet 2 can fully contact the surface of the activated carbon cloth 1, thereby improving the heat conduction effect between the thermally conductive sheet 2 and the activated carbon cloth 1. When the outer contour of the thermally conductive sheet 2 is substantially the same as the outer contour of the activated carbon cloth 1, the adsorption assembly formed by stacking multiple thermally conductive sheets 2 and multiple activated carbon cloths 1 has a columnar structure.

[0045] Reference Figure 3 and Figure 4 In order to facilitate the flow of gas between the multiple activated carbon cloths 1, the heat conducting sheet 2 can be provided with multiple air holes 21 that penetrate the heat conducting sheet 2 along the stacking direction of the activated carbon cloths 1. The gas containing impurities can flow from one activated carbon cloth 1 to another activated carbon cloth 1 through the air holes 21 of the heat conducting sheet 2, so that the multiple activated carbon cloths 1 can adsorb the gas containing impurities multiple times, thereby improving the adsorption effect of the adsorption device.

[0046] In some specific embodiments, the multiple air holes 21 on each thermally conductive sheet 2 are evenly spaced to improve the uniformity of gas passing through the thermally conductive sheet 2, thereby ensuring uniform contact between the gas passing through the thermally conductive sheet 2 and the activated carbon cloth 1. The air holes 21 can be elongated holes, and the air holes 21 can extend along the length or width of the thermally conductive sheet 2. When the air holes 21 extend along the length of the thermally conductive sheet 2, the multiple air holes 21 can be spaced apart along the width of the thermally conductive sheet 2; when the air holes 21 extend along the width of the thermally conductive sheet 2, the multiple air holes 21 can be spaced apart along the length of the thermally conductive sheet 2.

[0047] Reference Figure 3 and Figure 5 In some specific embodiments, to prevent the activated carbon cloth 1 from being squeezed, which may result in a reduction in the pores of the activated carbon cloth 1 or damage to the activated carbon cloth 1, the activated carbon cloth 1 may be provided with a mounting hole 11 that passes through the activated carbon cloth 1 along the stacking direction of the activated carbon cloth 1. The mounting hole 11 may accommodate a gasket 111. The thickness of the gasket 111 may be the same as, or substantially the same as, the thickness of the activated carbon cloth 1. When the thermally conductive sheets 2 located on either side of the activated carbon cloth 1 tend to squeeze the activated carbon cloth 1, the thermally conductive sheets 2 will abut against the gasket 111, so that the gasket 111 can limit further movement of the thermally conductive sheets 2 and ensure that the spacing between the thermally conductive sheets 2 located on adjacent sides of the activated carbon cloth 1 is the same as, or substantially the same as, the thickness of the gasket 111. This prevents damage to the activated carbon cloth 1 due to squeezing, or reduces the pores due to squeezing, which could affect the adsorption performance of the activated carbon cloth 1.

[0048] Reference Figure 2 In some specific embodiments, after the multiple thermally conductive sheets 2 and the multiple activated carbon cloths 1 are stacked, they can be secured by fasteners 3 and mating members 33 to prevent relative displacement of the multiple thermally conductive sheets 2 and the multiple activated carbon cloths 1 during use. For example, the multiple activated carbon cloths 1 and the multiple thermally conductive sheets 2 can each be provided with a clearance hole 12 for circumventing the fasteners 3. When the multiple activated carbon cloths 1 and the multiple thermally conductive sheets 2 are stacked, the clearance holes 12 of the multiple activated carbon cloths 1 and the multiple thermally conductive sheets 2 can communicate with each other to form a clearance channel 13, which can be used to allow the fasteners 3 to pass through.

[0049] Specifically, the fastener 3 includes an integrally formed head 31 and a stem 32. The cross-sectional area of ​​the head 31 of the fastener 3 can be larger than the radial cross-sectional area of ​​the avoidance channel 13, so that the head 31 of the fastener 3 can abut against the adsorption assembly; the radial cross-sectional area of ​​the stem 32 of the fastener 3 can be smaller than the radial cross-sectional area of ​​the avoidance channel 13, so that the stem 32 of the fastener 3 can pass through the avoidance channel 13 and protrude outward from the adsorption assembly. The fitting 33 can be threadedly connected to the portion of the stem 32 of the fastener 3 that protrudes outward from the avoidance channel 13. In this case, the fitting 33 and the head 31 of the fastener 3 are located at opposite ends of the adsorption assembly composed of multiple heat conductive sheets 2 and multiple activated carbon cloths 1, and the fitting 33 and the head 31 of the fastener 3 can clamp and fix the adsorption assembly, so that the multiple heat conductive sheets 2 and the multiple activated carbon cloths 1 remain relatively fixed after being stacked.

[0050] Each activated carbon cloth 1 and each heat conducting sheet 2 may be provided with a respective avoidance hole 12, so that a plurality of activated carbon cloths 1 and a plurality of heat conducting sheets 2 are stacked to form a avoidance channel 13; or, each activated carbon cloth 1 and each heat conducting sheet 2 may be provided with a respective avoidance hole 12, for example, each activated carbon cloth 1 and each heat conducting sheet 2 are provided with two avoidance holes 12, so that a plurality of activated carbon cloths 1 and a plurality of heat conducting sheets 2 are stacked to form two avoidance channels 13, and the two avoidance channels 13 are arranged correspondingly relative to the middle of the activated carbon cloth 1. Each avoidance channel 13 can be used to allow a fastener 3 to pass through, and the adsorption assembly can be clamped and fixed by the fastener 3 and the matching piece 33 connected to the fastener 3; therefore, an adsorption assembly can be fixed by two fasteners 3 and the corresponding two matching pieces 33, ensuring the stability of the relative positions of the plurality of heat conducting sheets 2 and the plurality of activated carbon cloths 1 in the adsorption assembly.

[0051] Reference Figure 5 To simplify the structure of the activated carbon cloth 1, when the activated carbon cloth 1 requires a mounting hole 11 for accommodating the gasket 111 and a clearance hole 12 for circumventing the thermal conductive sheet 2, the activated carbon cloth 1 may only have the larger of the mounting hole 11 and the clearance hole 12. Specifically, the activated carbon cloth 1 may only have the mounting hole 11 for accommodating the gasket 111, with the mounting hole 11 and the clearance hole 12 positioned concentrically, so that the mounting hole 11 includes the clearance hole 12 and can circumvent the fastener 3. Furthermore, the gasket 111 may also have a through-hole for circumventing the fastener 3, allowing the fastener 3 to pass through the gasket 111, the activated carbon cloth 1, and the thermal conductive sheet 2. In other embodiments, the activated carbon cloth 1 may also have both the mounting hole 11 and the clearance hole 12, with the mounting hole 11 and the clearance hole 12 spaced apart.

[0052] Reference Figure 3In some specific embodiments, an adsorption assembly consisting of multiple thermally conductive sheets 2 and multiple activated carbon cloths 1 can be mounted on a mounting carrier 4. For example, one end of the adsorption assembly abuts against the mounting carrier 4. When it is necessary to clamp and fix the multiple thermally conductive sheets 2 and multiple activated carbon cloths 1, the rod 32 of the fastener 3 can further pass through the mounting carrier 4 after passing through the avoidance channel 13. The fitting 33 is threadedly connected to the portion of the rod 32 of the fastener 3 that passes through and protrudes from the mounting carrier 4. The fitting 33 abuts against the end of the mounting carrier 4 that faces away from the adsorption assembly, and the head 31 of the fastener 3 abuts against the end of the adsorption assembly that faces away from the mounting carrier 4. The fitting 33 and the fastener 3 jointly clamp the adsorption assembly and the mounting carrier 4 so that the adsorption assembly and the mounting carrier 4 remain relatively fixed. The mounting carrier 4 can be a copper plate with good thermal conductivity, and the thickness of the mounting carrier 4 can be greater than the thickness of the thermally conductive sheet 2.

[0053] In some specific embodiments, the adsorption device may further include a heating element 6, which can be used to heat the activated carbon cloth 1. When the activated carbon cloth 1 is at a low temperature, for example, below 4K (Kelvins), the activated carbon cloth 1 can adsorb impurities such as helium, nitrogen, and water vapor in the working environment of the superconducting magnet. When the activated carbon cloth 1 is heated to a high temperature (for example, above room temperature, 20K), the helium, nitrogen, water vapor, and other impurities in the activated carbon cloth 1 are released in sequence, thereby activating the activated carbon cloth 1. The activated activated carbon cloth 1 can then be used again to adsorb impurities in the working environment of the superconducting magnet.

[0054] The heater 6 can be installed within the fastener 3 to simplify the structure of the adsorption device. Specifically, the fastener 3 defines a mounting cavity 34 for accommodating the heater 6. The mounting cavity 34 extends along the stacking direction of the activated carbon cloth 1 and can pass through all of the activated carbon cloths 1 and the thermal conductive sheet 2. The heater 6 is installed within the mounting cavity 34, and the direction in which the heater 6 extends is the same as the direction in which the mounting cavity 34 extends. The heater 6 can pass through all of the activated carbon cloths 1 and the thermal conductive sheet 2, allowing the heater 6 to heat multiple activated carbon cloths 1 simultaneously. By providing the mounting cavity 34 within the fastener 3 to accommodate the heater 6, a separate space for mounting the heater 6 is not required within the adsorption device, simplifying the structure of the adsorption device. When multiple fasteners 3 are provided, for example, two fasteners 3 are provided, the number of heaters 6 can be set to the same as the number of fasteners 3, with each heater 6 being installed within a mounting cavity 34 of a fastener 3. The activated carbon cloth 1 is heated by the multiple heating elements 6 in the multiple fasteners 3, which shortens the activation time of the activated carbon cloth 1 and increases the activation speed of the activated carbon cloth 1. The heating element 6 can be a long strip heater.

[0055] In some specific embodiments, the adsorption device further includes a temperature detection element 5, which can be fixedly mounted on the mounting plate 4 and can be used to detect the temperature of the activated carbon cloth 1. For example, when the activated carbon cloth 1 is required to adsorb impurities in the working environment of the superconducting magnet, the temperature detection element 5 is used to detect whether the temperature of the activated carbon cloth 1 is in a low-temperature state, for example, whether the temperature of the activated carbon cloth 1 is lower than 4K. If the activated carbon cloth 1 is in a low-temperature state, the activated carbon cloth 1 can be used to adsorb impurities. If the activated carbon cloth 1 is not in a low-temperature state, for example, if the temperature of the activated carbon cloth 1 is higher than 4K, the activated carbon cloth 1 needs to be further cooled to keep it in a low-temperature state. When the activated carbon cloth 1 needs to be activated, the temperature detection element 5 is used to detect whether the temperature of the activated carbon cloth 1 has reached a specified temperature, for example, whether the temperature of the activated carbon cloth 1 is higher than 20K at room temperature. If the temperature of the activated carbon cloth 1 has not reached the specified temperature, the activated carbon cloth 1 is further heated. When the activated carbon cloth 1 reaches the specified temperature and maintains it for a certain period of time, the activated carbon cloth 1 can be activated. The time it takes to heat the activated carbon cloth 1 to the specified temperature can be used to obtain the reheating activation time of the activated carbon cloth 1. This reheating activation time is used as a standard for the heating time in subsequent activation operations. The temperature detection element 5 can be specifically a thermometer. The temperature detection element 5 can be installed at the center position of the mounting plate 4 along the length direction of the activated carbon cloth 1, and the temperature detection element 5 can be arranged adjacent to the activated carbon cloth 1.

[0056] The present invention also provides a superconducting magnet assembly, comprising a superconducting magnet and the above-mentioned adsorption device. The adsorption device is installed on the superconducting magnet to adsorb impurities in the working environment of the superconducting magnet. The adsorption device is preferably installed in the upper middle part of the superconducting magnet and is located at a temperature of 4K to ensure that the gas in the working environment of the superconducting magnet can fully flow through the adsorption device, and the adsorption device adsorbs impurities in the gas to reduce or eliminate the impact of impurities on the superconducting magnet, maintain the vacuum degree in the superconducting magnet, reduce the risk of convective heat leakage, ensure the stable operation of the superconducting magnet and improve the performance and service life of the superconducting magnet. Among them, the adsorption device can be specifically installed on the superconducting magnet by installing a carrier plate 4, and the mounting carrier plate 4 can be fixedly installed on the superconducting magnet by a threaded connection. The mounting carrier plate 4 is a copper plate with good thermal conductivity, so that the cold source of the superconducting magnet can quickly cool the activated carbon cloth 1 and the heat conducting plate 2 by installing the carrier plate 4.

[0057] In some specific embodiments, the superconducting magnet may further include a vacuum gauge, which can be used to detect the vacuum level within the superconducting magnet. When the vacuum level within the superconducting magnet is lower than a preset value, the adsorption device may be activated to improve its ability to adsorb impurities. When the vacuum level within the superconducting magnet is at or above the preset value, the adsorption device may be used to adsorb impurities in the superconducting magnet's operating environment to reduce their impact on the superconducting magnet. The preset value can be set as needed; for example, it may be lower than the vacuum level required for superconducting magnet operation.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the present invention.

Claims

1. An adsorption device for a superconducting magnet, characterized in that: include: A plurality of activated carbon cloths (1), wherein the plurality of activated carbon cloths (1) are stacked along the thickness direction of the activated carbon cloths (1) and are used together to adsorb impurities in the working environment of the superconducting magnet; A plurality of heat-conducting sheets (2), the heat-conducting sheets (2) and the activated carbon cloth (1) are arranged in an alternating and stacked manner, and the heat-conducting sheets (2) are used to conduct heat transfer with an external cold source; the plurality of activated carbon cloths (1) and the plurality of heat-conducting sheets (2) together constitute an adsorption component, and each activated carbon cloth (1) is used to conduct heat with at least one heat-conducting sheet (2); A mounting carrier plate (4), the mounting carrier plate (4) being arranged on one side of the adsorption component and abutting against the adsorption component; A heating element (6) is used to heat the activated carbon cloth (1).

2. The adsorption device for superconducting magnets according to claim 1, characterized in that: The outer contour of the heat conducting sheet (2) is adapted to the outer contour of the activated carbon cloth (1), and the heat conducting sheet (2) is provided with a plurality of air holes (21) penetrating the heat conducting sheet (2), and the air holes (21) are used to allow the impurities to pass through; And / or, the specific surface area of ​​the activated carbon cloth (1) is 1000-3000m 2 / g.

3. The adsorption device for superconducting magnets according to claim 2, characterized in that: The plurality of air holes (21) on each of the heat conducting plates (2) are distributed at equal intervals, and the air holes (21) are long holes extending along the length direction or width direction of the heat conducting plate (2); And / or, the heat conducting sheet (2) is a copper sheet.

4. The adsorption device for superconducting magnets according to claim 1, characterized in that: The activated carbon cloth (1) is provided with a mounting hole (11) penetrating along the stacking direction of the activated carbon cloth (1); a gasket (111) is accommodated in the mounting hole (11); the gasket (111) is used to abut against the heat conducting sheet (2) to limit the spacing between adjacent heat conducting sheets (2).

5. The adsorption device for superconducting magnets according to claim 1, characterized in that: Each of the activated carbon cloths (1) is provided with a heat conducting sheet (2) at two opposite ends along the stacking direction, and the adsorption components are provided with heat conducting sheets (2) at two opposite ends.

6. The adsorption device for superconducting magnets according to claim 5, characterized in that: The invention also includes a fastener (3) and a matching piece (33), wherein the fastener (3) includes a head (31) and a rod (32); the activated carbon cloth (1) and the heat conducting plate (2) are respectively provided with avoidance holes (12) for avoiding the rod (32), and a plurality of avoidance holes (12) of the activated carbon cloth (1) and the heat conducting plate (2) are connected to form an avoidance channel (13) for the rod (32) to pass through; the matching piece (33) is connected to an end of the rod (32) away from the head (31), and the head (31) and the matching piece (33) are located at opposite ends of the adsorption component and are used to clamp and fix the adsorption component.

7. The adsorption device for superconducting magnets according to claim 6, characterized in that: The mounting plate (4) is arranged on a side of the adsorption component away from the head (31), and the fitting (33) abuts against a side of the mounting plate (4) away from the adsorption component.

8. The adsorption device for superconducting magnets according to claim 7, characterized in that: It also includes a temperature detection component (5), the temperature detection component (5) is fixedly mounted on the mounting carrier (4), and the temperature detection component (5) is used to detect the temperature of the activated carbon cloth (1); And / or, the mounting carrier plate (4) is a copper plate, and the thickness of the mounting carrier plate (4) is greater than the thickness of the heat conducting plate (2).

9. The adsorption device for superconducting magnets according to claim 6, characterized in that: The fastener (3) is provided with an installation cavity (34), and the installation cavity (34) extends along the stacking direction of the activated carbon cloth (1). The heating element (6) is installed in the installation cavity (34) and is used to heat the activated carbon cloth (1). The fastener (3) and the heating element (6) are respectively provided with two, each of the heating elements (6) is installed in the installation cavity (34) corresponding to the fastener (3), and the two heating elements (6) are arranged at intervals and are used together to heat the activated carbon cloth (1).

10. A superconducting magnet assembly, characterized in that: include: superconducting magnets; The adsorption device according to any one of claims 1 to 9, mounted on the superconducting magnet, for adsorbing impurities in the working environment of the superconducting magnet; The mounting plate is fixedly mounted on the upper middle portion of the superconducting magnet; And / or, the superconducting magnet includes a vacuum gauge, and the vacuum gauge is used to detect the vacuum degree in the superconducting magnet.

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