High-temperature superconducting magnet, opposite-pole type high-temperature superconducting device and superconducting induction heating equipment

Abstract

The invention relates to the technical field of induction heating, in particular to a high-temperature superconducting magnet, a counter-pole type high-temperature superconducting device and superconducting induction heating equipment, and the high-temperature superconducting magnet comprises a Dewar assembly, a cold shield assembly arranged in the Dewar assembly, and a coil assembly and a refrigeration assembly which are arranged in the cold shield assembly, the coil assembly comprises a supporting framework, cold conduction aluminum plates and a double-pancake coil, the supporting framework is arranged in the cold shield assembly and comprises a framework inner cylinder and framework end plates arranged at the two ends of the framework inner cylinder, the two cold conduction aluminum plates are arranged at the two opposite ends of the framework inner cylinder respectively, and the double-pancake coil is arranged between the two cold conduction aluminum plates in a stacked mode in the axial direction; the double-pancake coil comprises a cold conduction partition plate, an epoxy inner ring, an epoxy outer ring and a superconducting coil arranged between the epoxy inner ring and the epoxy outer ring. The coil of the high-temperature superconducting magnet has a better cold conduction effect, a magnetic field with higher magnetic field intensity can be generated, the coil structure is more stable, and dislocation of a superconducting strip under the action of electromagnetic force is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of induction heating, in particular to a high-temperature superconducting magnet, a two-stage high-temperature superconducting device and a superconducting induction heating equipment. BACKGROUND

[0002] The metal hot working industry has long relied on combustion heating and resistance heating, which has problems such as low efficiency, high energy consumption and serious pollution. Although the traditional induction heating improves the efficiency through the principle of electromagnetic induction, it is limited by the copper coil resistance loss, and the power frequency furnace has an energy efficiency of less than 50%, and the heating uniformity is poor, which is difficult to meet the needs of high-end manufacturing. High-temperature superconducting magnet technology is an important branch of superconducting field, which is to use superconducting materials with a critical temperature higher than the liquid helium temperature zone (4.2K) to realize zero-resistance conduction and complete diamagnetism, thereby generating a strong magnetic field. When a metal rod such as an aluminum rod is cut in this strong magnetic field, eddy currents will be formed inside the metal rod. These eddy currents flow inside the metal rod and generate a large amount of heat due to the presence of resistance, thereby achieving the purpose of efficient heating.

[0003] In related technologies, the coil structure of the superconducting magnet is mainly wound in a solenoid winding manner. This precise layer-by-layer winding results in a very small gap between the layers, and there are hundreds of layers in the coil, so that the curing material is difficult to penetrate to the inner layer of the coil, resulting in poor cooling effect of the coil, and it is difficult for the superconducting tape to maintain high-field steady-state (superconducting state) operation. Moreover, the insufficient penetration of the curing material makes the overall strength of the coil low, and the superconducting tape is prone to misalignment under the action of electromagnetic force, which causes damage to the superconducting tape and leads to loss of superconductivity. SUMMARY

[0004] The present application aims to provide a high-temperature superconducting magnet, a two-stage high-temperature superconducting device and a superconducting induction heating equipment to solve the technical problems of misalignment of the superconducting tape of the coil structure of the superconducting magnet under the action of electromagnetic force, poor cooling and heat dissipation effect, and difficulty in adapting to various working conditions in related technologies.

[0005] In a first aspect, the present application provides a high-temperature superconducting magnet, comprising: A dewar assembly has a first through hole provided on a central axis and a first annular cavity surrounding the first through hole and spaced therefrom, the first through hole being used for the iron core to pass through, and the first annular cavity being provided in a sealed vacuum state; A cold screen assembly is coaxially arranged in the first annular cavity, and the cold screen assembly has a second through hole provided on a central axis and a second annular cavity surrounding the second through hole and spaced therefrom; A coil assembly includes a support frame, a cooling aluminum plate, and a double-panel coil. The support frame is disposed in a second annular cavity. The support frame includes an inner cylinder and end plates disposed opposite to each other at both ends of the inner cylinder. A coil cavity is formed between the two end plates. The two cooling aluminum plates are respectively disposed on opposite surfaces of the coil cavity. Multiple double-panel coils are stacked axially between the two cooling aluminum plates. The double-panel coil includes a ring-shaped cooling partition, an epoxy inner ring and an epoxy outer ring respectively disposed on the inner and outer edges of the cooling partition and protruding from one end face of the cooling partition, and a superconducting coil disposed between the epoxy inner ring and the epoxy outer ring. The cooling component is connected to the cooling screen component, the cooling aluminum plate, and the connecting ear, respectively. The cooling component is used to cool the superconducting coil so that the superconducting tape can maintain superconducting operation.

[0006] In some embodiments, multiple fastening screws are spaced around the coil cavity on the support frame, and each fastening screw passes through the cooling aluminum plate at both ends and is connected to the frame end plate to fix the multiple stacked double-pane coils.

[0007] In some embodiments, the Dewar assembly includes an outer Dewar cylinder, an inner Dewar cylinder, an upper Dewar cover, and a lower Dewar cover. The inner Dewar cylinder is coaxially disposed inside the outer Dewar cylinder. The inner Dewar cylinder forms a first through hole that is axially disposed and allows the iron core to pass through. The upper Dewar cover and the lower Dewar cover are respectively disposed on the opposite end faces of the outer Dewar cylinder and the inner Dewar cylinder to form a first annular cavity that surrounds and seals the first through hole.

[0008] In some embodiments, the cold screen assembly includes a cold screen outer cylinder, a cold screen inner cylinder, a cold screen upper cover, and a cold screen lower cover. The cold screen inner cylinder is coaxially disposed inside the cold screen outer cylinder. The cold screen inner cylinder forms a second through hole that is axially disposed and coaxially sleeved within the Dewar inner cylinder. The cold screen upper cover and the cold screen lower cover are respectively disposed on the opposite end faces of the cold screen outer cylinder and the cold screen inner cylinder to form a second annular cavity surrounding the through hole.

[0009] In some embodiments, the outer end face of the Dewar tube is provided with a Dewar protrusion, and the outer tube of the cold shield is provided with a cold shield protrusion within the Dewar protrusion; the refrigeration assembly includes a refrigeration unit disposed at the outer end of the Dewar protrusion, the output end of the refrigeration unit has a primary cold head and a secondary cold head, the primary cold head is connected to the cold shield protrusion in the first annular cavity, and the secondary cold head is connected to the coil assembly in the second annular cavity.

[0010] In some embodiments, the support frame is provided with at least one main cold plate connected to the secondary cold head, and at least a portion of the main cold plate is connected to the two heat-conducting aluminum plates; each heat-conducting partition is provided with at least one connecting lug on its side end face, and each connecting lug is connected to the main cold plate through a soft copper heat-conducting component.

[0011] In some embodiments, the high-temperature superconducting magnet further includes a suspension assembly, which includes a first titanium alloy tie rod and a second titanium alloy tie rod. One end of the first titanium alloy tie rod is connected to the lower cover of the Dewar, and the other end passes through the lower cover of the cold screen and is connected to the end plate of the skeleton. One end of the second titanium alloy tie rod is connected to the outer cylinder of the Dewar, and the other end passes through the outer cylinder of the cold screen and is connected to the end plate of the skeleton. A plurality of the first titanium alloy tie rods are perpendicular to the end plate of the skeleton and spaced apart, and at least two sets of the second titanium alloy tie rods are respectively arranged at both ends of the inner cylinder of the skeleton.

[0012] In some embodiments, the suspension assembly further includes a first epoxy tie rod and a second epoxy tie rod distributed perpendicularly to the first epoxy tie rod. One end of the first epoxy tie rod and the second epoxy tie rod are respectively connected to the Dewar outer cylinder, and the other end respectively pass through the cold screen outer cylinder and are connected to the skeleton end plate.

[0013] Compared with the prior art, the technical solution provided in the first aspect of this application has at least the following beneficial effects or advantages: The high-temperature superconducting magnet provided in this application utilizes a Dewar assemblies to bear the weight and electromagnetic force of the coil assembly and maintain it in a vacuum state to reduce heat convection. A cooling shield assembly reduces heat radiation to the coil assembly and keeps it in a low-temperature operating environment. The coil assembly is supported by a frame, a cooling aluminum plate, and two-panel coils. The frame secures the coil assembly to the cooling shield assembly and mounts the cooling aluminum plate and the two-panel coils. The two-panel coils are stacked in a sheet-like arrangement to form a single coil assembly. One side of the double-pane coil is open, allowing the epoxy material to penetrate more easily into the two layers of superconducting tape during the curing process. After curing, the upper and lower surfaces of the double-pane coil are flatter, and the double-pane coils can be stacked without gaps, thereby improving the cooling effect of the coil assembly and the overall structural strength of the coil assembly. In addition, each double-pane coil is equipped with a cooling partition, and the superconducting coil is attached between the two cooling partitions. The cooling partitions and cooling aluminum plates further improve the heat dissipation effect of the coil, which can maintain high-field steady-state (superconducting state) operation for a longer time and generate a stronger magnetic field.

[0014] Secondly, this application provides a pair of high-temperature superconducting devices, the devices comprising a pair of high-temperature superconducting magnets as described in any of the first aspects above, iron cores, and a drive system for controlling the movement of the high-temperature superconducting magnets. The two iron cores are coaxially spaced apart, and the pair of high-temperature superconducting magnets are respectively sleeved on the two iron cores and arranged in a mirror image. The drive system adjusts the magnetic field strength formed between the two high-temperature superconducting magnets by controlling the two high-temperature superconducting magnets to move towards or in opposite directions.

[0015] Compared with the prior art, the technical solution provided in the second aspect of this application has at least the following beneficial effects or advantages: The parallel-type high-temperature superconducting device provided in this application, through the arrangement of high-temperature superconducting magnets and an iron core, with the high-temperature superconducting magnets arranged in pairs and mirror images, and controlled by a drive system to move the two high-temperature superconducting magnets in opposite directions, allows for a wider range of air gap adjustment and more convenient adjustment. Simultaneously, a stronger magnetic field can be generated between the two high-temperature superconducting magnets, thereby improving the adaptability of the device, especially for applications in high-magnetic-field scenarios. The technical effects achieved by the high-temperature superconducting magnets in the device are described in the first aspect above and will not be repeated here. Thirdly, this application provides a superconducting induction heating device, which includes the parallel-type high-temperature superconducting device as described in the third aspect above.

[0016] It should be noted that the technical effects achieved by the technical solution provided in the third aspect above compared with the prior art can be found in the relevant description in the second aspect above, and will not be elaborated here.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a high-temperature superconducting magnet provided according to an embodiment of this application; Figure 2 This is a schematic diagram of the exploded structure of a high-temperature superconducting magnet according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the coil assembly provided according to an embodiment of this application; Figure 4 This is an exploded structural diagram of a coil assembly provided according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a double-pane coil according to an embodiment of this application; Figure 6 This is a cross-sectional view of a double-pane coil provided according to an embodiment of this application; Figure 7 This is a cross-sectional view of a high-temperature superconducting magnet provided according to an embodiment of this application; Figure 8 This is a partial cross-sectional view of a high-temperature superconducting magnet provided according to an embodiment of this application; Figure 9 This is a schematic diagram of the internal structure of a high-temperature superconducting magnet according to an embodiment of this application; Figure 10 This is a schematic diagram of the structure of a superconducting induction heating device provided according to an embodiment of this application.

[0020] Figure label: 1000, High-temperature superconducting device; 1001, Support frame; 100, High-temperature superconducting magnet; 200, Iron core; 300, Drive system; 10. Dewar assembly; 11. Dewar outer cylinder; 111. Dewar protrusion; 12. Dewar inner cylinder; 121. First through hole; 13. Dewar upper cover; 14. Dewar lower cover; 15. First annular cavity; 20. Cold screen assembly; 21. Cold screen outer cylinder; 211. Cold screen protrusion; 22. Cold screen inner cylinder; 221. Second through hole; 23. Cold screen upper cover; 24. Cold screen lower cover; 25. Second annular cavity; 30. Coil assembly; 31. Support frame; 311. Inner cylinder of the frame; 312. Frame end plate; 32. Cooling-conducting aluminum plate; 321. Fastening screw; 33. Double-panel coil; 331. Cooling-conducting partition; 3311. Connecting lug; 332. Epoxy inner ring; 333. Epoxy outer ring; 334. Superconducting coil; 34. Main cooling plate; 35. Soft copper cooling component; 36. L-shaped cooling component; 40. Refrigeration components; 41. Refrigeration unit; 42. Primary cold head; 421. Primary heat conduction flexible connection; 43. Secondary cold head; 431. Secondary heat conduction flexible connection; 50. Suspension assembly; 51. First titanium alloy tie rod; 52. Second titanium alloy tie rod; 53. First epoxy tie rod; 54. Second epoxy tie rod. Detailed Implementation

[0021] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0022] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.

[0023] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0026] Please see Figures 1 to 6 This embodiment provides a high-temperature superconducting magnet 100, which includes at least a Dewar assembly 10, a cold shield assembly 20, a coil assembly 30, and a cooling assembly 40. The Dewar assembly 10 has a first through hole 121 disposed on the central axis and a first annular cavity 15 disposed around and spaced apart from the first through hole 121. The first through hole 121 is used for the iron core 200 to pass through, and the first annular cavity 15 is sealed and vacuum disposed. The cold shield assembly 20 is coaxially disposed in the first annular cavity 15. The cold shield assembly 20 has a second through hole 221 disposed on the central axis and a second annular cavity 25 disposed around and spaced apart from the second through hole 221.

[0027] It should be noted that the first through hole 121 and the first annular cavity 15 can be completely separated by a partition. The cold screen assembly 20 is coaxially sleeved in the first annular cavity 15, that is, the Dewar assembly 10 completely seals the cold screen assembly 20 in the first annular cavity 15. The cold screen assembly 20 is structurally similar to the Dewar assembly 10, that is, both the cold screen assembly 20 and the Dewar assembly 10 are arranged in annular shape. When the cold screen assembly 20 is installed in the Dewar assembly 10, the projection contour of the first through hole 121 along the axial direction is located in the second through hole 221, and the projection contour of the second annular cavity 25 along the axial direction is located in the first annular cavity 15.

[0028] Furthermore, the coil assembly 30 includes a support frame 31, cooling aluminum plates 32, and double-panel coils 33. The support frame 31 is disposed in the second annular cavity 25. The support frame 31 includes an inner frame cylinder 311 and frame end plates 312 disposed opposite to each other at both ends of the inner frame cylinder 311. A coil cavity is formed between the two frame end plates 312. The two cooling aluminum plates 32 are respectively disposed on opposite surfaces of the coil cavity. Multiple double-panel coils 33 are stacked axially between the two cooling aluminum plates 32. The double-panel coils 33 are wrapped with... The system includes a ring-shaped cooling partition 331, an epoxy inner ring 332 and an epoxy outer ring 333 respectively disposed on the inner and outer edges of the cooling partition 331 and protruding from one side end face of the cooling partition 331, and a superconducting coil 334 disposed between the epoxy inner ring 332 and the epoxy outer ring 333; the cooling assembly 40 is connected to the cooling screen assembly 20, the cooling aluminum plate 32 and the connecting lug 3311 respectively, and the cooling assembly 40 is used to cool the superconducting coil 334 so that the superconducting strip maintains superconducting operation.

[0029] It should be understood that, unlike the high-temperature superconducting magnet 100 in the prior art, the coil of the high-temperature superconducting magnet 100 in the prior art is precisely wound layer by layer using a solenoid winding method. This setting results in very small gaps between coil layers. Under normal circumstances, the coil has about one hundred layers. Moreover, this solenoid winding method is a whole stacked together, which makes it difficult for the curing material of the curing process to penetrate. If the coil as a whole is not completely cured, it will be difficult to eliminate the gaps between the superconducting tapes, thus seriously affecting the coil's heat conduction and overall strength. As a result, it is difficult to operate for a long time in strong magnetic field and high field scenarios, such as in some conditions where the maximum magnetic field needs to be greater than 3T.

[0030] In this embodiment, the coil assembly 30 consists of a support frame 31, a cooling aluminum plate 32, and a double-panel coil 33. The support frame 31 is used to fix the coil assembly 30 in the cold shield assembly 20 and to install the cooling aluminum plate 32 and the double-panel coil 33. The double-panel coils 33 are stacked in a sheet-like manner to form a whole coil assembly 30. One side of the double-panel coil 33 is open, so that the curing material can more easily penetrate into the two layers of superconducting tape during the curing process. This structural design also simplifies the curing process of the double-panel coil 33, making the curing process more convenient. At the same time, the structure of the double-panel coil 33 in this embodiment allows each double-panel coil 33 to be cured individually, resulting in complete and seamless curing. Specifically, after curing, the upper and lower surfaces of the double-panel coil 33 are flatter, and the stacked double-panel coils 33 naturally have no gaps, thereby improving the cooling effect of the coil assembly 30 and increasing the overall structural strength of the coil assembly 30.

[0031] Furthermore, each double-pane coil 33 is provided with a cooling baffle 331, and the superconducting coil 334 is attached to both sides of the cooling baffle 331. In this way, the cooling baffle 331 can cool the adjacent superconducting coil 334. That is, the stacked cooling baffle 331 can cool the inside of the superconducting coil 334 more efficiently, avoiding the generation of high temperature inside the coil. At the same time, the setting of the cooling baffle 331 is also conducive to the stability of the coil, preventing the superconducting tape of the double-pane coil 33 from being misaligned under the action of electromagnetic force, which would cause damage to the superconducting tape and thus cause loss of quench. By setting the cooling aluminum plate 32 on the end face of the double-pane coil 33 on the outermost two sides, the overall cooling effect of the coil assembly 30 is more uniform, so that the high-temperature superconducting magnet 100 of this embodiment can maintain high field steady state (superconducting state) operation for a longer time and generate a magnetic field with greater magnetic field strength.

[0032] It should also be understood that the coil assembly 30 is racetrack-shaped, as are the first annular cavity 15 and the second annular cavity 25, which facilitates the installation of the coil assembly 30 within the second annular cavity 25. Furthermore, in this embodiment, the Dewar assembly 10 is used to bear the weight and electromagnetic force of the coil assembly 30. After the coil assembly 30 is installed within the cold shield assembly 20, it is fixedly connected to the Dewar assembly 10, thus keeping the coil assembly 30 fixed after installation and maintaining it in a vacuum state to reduce heat convection. The cold shield assembly 20 is used to reduce heat radiation to the coil assembly 30 and maintain it in a low-temperature operating environment. The primary cold head 42 of the refrigeration unit 40's refrigeration unit 41 is connected to the cold shield assembly 20 via a heat-conducting connection, and the secondary cold head 43 is connected to the heat-conducting aluminum plate 32 and the connecting lug 3311 via a heat-conducting connection, thereby achieving more uniform and efficient cooling of the superconducting coil 334 to maintain the superconducting tape in a superconducting state.

[0033] Please see Figures 3 to 8 In some embodiments, multiple fastening screws 321 are spaced around the coil cavity on the support frame 31. Each fastening screw 321 passes through a cooling aluminum plate 32 at both ends and is connected to the frame end plate 312 to fix the multiple stacked double-pane coils 33. Specifically, the cooling aluminum plate 32 and the multiple double-pane coils 33 are stacked and sleeved on the inner cylinder 311 of the frame, so that the two cooling aluminum plates 32 sandwich the multiple double-pane coils 33. In this embodiment, there can be fourteen double-pane coils 33. The fourteen double-pane coils 33 are stacked and sandwiched between two cooling aluminum plates 32, and the side edges of the two cooling aluminum plates 32 protrude from the side edges of the double-pane coils 33. Then, multiple fastening screws 321 pass through the cooling aluminum plates 32 at both ends and are connected to the frame end plate 312 to form a coil assembly 30 as a whole, making the structure of the coil assembly 30 more stable.

[0034] Optionally, the superconducting coil 334 can be wound with high-temperature superconducting material YBCO tape, and the high-temperature superconducting tape can be a flat strip (e.g., superconducting tape dimensions: thickness 0.38mm, width 5mm). Two connecting lugs 3311 can be set at intervals on each double-pane coil 33. Then, two L-shaped cooling elements 36 are set at corresponding positions on the support frame 31. The two L-shaped cooling elements 36 are connected to the corresponding connecting lugs 3311 respectively, so that all the double-pane coils 33 are connected to each other. The two L-shaped cooling elements 36 are then connected to the main cooling plate 34 through soft copper cooling elements 35. Two cooling aluminum plates 32 can be connected to both ends of the main cooling plate 34, so that the cold energy generated by the cooling component 40 is further transferred to the middle of the superconducting coil 334.

[0035] Please see Figure 2 , Figure 7 and Figure 8In some embodiments, the Dewar assembly 10 includes an outer Dewar cylinder 11, an inner Dewar cylinder 12, an upper Dewar cover 13, and a lower Dewar cover 14. The inner Dewar cylinder 12 is coaxially disposed inside the outer Dewar cylinder 11. The inner Dewar cylinder 12 forms a first through hole 121 that is axially disposed and allows the iron core 200 to pass through. The upper Dewar cover 13 and the lower Dewar cover 14 are respectively disposed on the opposite end faces of the outer Dewar cylinder 11 and the inner Dewar cylinder 12 to form a first annular cavity 15 that surrounds the first through hole 121 and is sealed. The upper Dewar cover 13 is sealed with the inner Dewar cylinder 12 and the outer Dewar cylinder 11 using O-rings and then connected by screws for easy maintenance later. In this embodiment, the Dewar assembly 10 is formed by the upper Dewar cover 13, the outer Dewar cylinder 11, the inner Dewar cylinder 12, and the lower Dewar cover 14, which together form a hollow, sealed first annular cavity 15. A normal temperature through hole is formed in the middle (for the iron core 200 to pass through), which can be used to bear the weight of the coil assembly 30 and the electromagnetic force of the coil assembly 30, and to keep the coil assembly 30 in a vacuum state, thereby reducing heat convection.

[0036] Continue reading Figure 2 , Figure 7 and Figure 8 In some embodiments, the cold screen assembly 20 includes a cold screen outer cylinder 21, a cold screen inner cylinder 22, a cold screen upper cover 23, and a cold screen lower cover 24. The cold screen inner cylinder 22 is coaxially disposed inside the cold screen outer cylinder 21. The cold screen inner cylinder 22 surrounds and forms a second through hole 221 that is axially disposed and coaxially sleeved on the Dewar inner cylinder 12. The cold screen upper cover 23 and the cold screen lower cover 24 are respectively covered on the opposite end faces of the cold screen outer cylinder 21 and the cold screen inner cylinder 22 to form a second annular cavity 25 surrounding the through hole. Specifically, the cold screen upper cover 23 is connected to the cold screen inner cylinder 22 and the cold screen outer cylinder 21 by screws, and the cold screen lower cover 24 is connected to the cold screen inner cylinder 22 and the cold screen outer cylinder 21 by screws. The cold screen upper cover 23, the cold screen outer cylinder 21, the cold screen inner cylinder 22, and the cold screen lower cover 24 surround a hollow second annular cavity 25, and the second through hole 221 is formed in the middle of the cold screen inner cylinder 22. The cold shield component 20 in this embodiment is mainly used to reduce heat radiation to the coil component 30 and keep the coil in a low-temperature working environment.

[0037] Continue reading Figure 2 , Figure 7 and Figure 8In some embodiments, the end face of the Dewar outer cylinder 11 is provided with a Dewar protrusion 111, and the cold screen outer cylinder 21 is provided with a cold screen protrusion 211 inside the Dewar protrusion 111; the refrigeration assembly 40 includes a refrigeration unit 41 disposed at the outer end of the Dewar protrusion 111, the output end of the refrigeration unit 41 has a primary cold head 42 and a secondary cold head 43, the primary cold head 42 is connected to the cold screen protrusion 211 in the first annular cavity 15 for heat conduction, and the secondary cold head 43 is connected to the coil assembly 30 in the second annular cavity 25 for heat conduction. Specifically, the support frame 31 is provided with at least one main cold plate 34 connected to the secondary cold head 43, and at least a portion of the main cold plate 34 is connected to the two heat conduction aluminum plates 32; each heat conduction partition 331 is provided with at least one connecting ear 3311 on its side end face, and each connecting ear 3311 is connected to the main cold plate 34 through a soft copper heat conduction component 35.

[0038] For example, the Dewar protrusion 111 and the outer Dewar cylinder 11, the lower Dewar cover 14 and the outer Dewar cylinder 11 and the inner Dewar cylinder 12 can all be sealed by welding. The Dewar protrusion 111 is formed into a small, hollow, sealed cuboid and communicates with the first annular cavity 15 formed by the upper Dewar cover 13, the outer Dewar cylinder 11, the inner Dewar cylinder 12 and the lower Dewar cover 14. The Dewar protrusion 111 is mainly used to support the refrigeration unit 41 so that the refrigeration unit 41 passes through it and to accommodate the protruding part of the cold shield; the cold shield protrusion 211 is sealed by welding to the outer cold shield cylinder 21. The cold shield protrusion 211 is formed into a small, hollow cuboid and communicates with the second annular cavity 25 formed by the upper cold shield cover 23, the outer cold shield cylinder 21, the inner cold shield cylinder 22 and the lower cold shield cover 24. The cold shield protrusion 211 is mainly used for conducting heat to the refrigeration unit 41.

[0039] Furthermore, the refrigerator 41 is mounted on the Dewar protrusion 111 and extends through the Dewar protrusion 111 into its interior. The refrigerator 41 and the Dewar protrusion 111 are sealed by an O-ring. The primary cold head 42 is connected to the cold screen protrusion 211 via a primary heat-conducting flexible connector 421, and then transfers the primary cooling energy to the entire cold screen assembly 20, ultimately cooling the cold screen to below a first preset temperature and maintaining it stably. The first preset temperature can be 50K. The secondary cold head 43 is connected via a secondary heat-conducting flexible connector 431, which is connected to the main cold plate 34 in the coil assembly 30. The secondary cooling energy is then transferred to the entire coil assembly 30, ultimately cooling the superconducting coil 334 to below a second preset temperature, which can be 8K-20K, to keep the superconducting tape in a steady state (superconducting state).

[0040] Please see Figures 7 to 9In some embodiments, the high-temperature superconducting magnet 100 further includes a suspension assembly 50, which includes a first titanium alloy tie rod 51 and a second titanium alloy tie rod 52. One end of the first titanium alloy tie rod 51 is connected to the lower cover 14 of the Dewar, and the other end passes through the lower cover 24 of the cold shield and is connected to the frame end plate 312. One end of the second titanium alloy tie rod 52 is connected to the outer cylinder 11 of the Dewar, and the other end passes through the outer cylinder 21 of the cold shield and is connected to the frame end plate 312. Multiple first titanium alloy tie rods 51 are perpendicular to the frame end plate 312 and spaced apart, with at least two sets. The second titanium alloy tie rods 52 are respectively arranged at both ends of the inner cylinder 311 of the skeleton. Meanwhile, the first titanium alloy tie rod 51 and the second titanium alloy tie rod 52 are arranged perpendicular to each other, so that the coil assembly 30 is fixed in the axial direction and in the horizontal direction perpendicular to the axial direction. At the same time, because there is a large attraction between the two high-temperature superconducting magnets 100, the first titanium alloy tie rod 51 and the second titanium alloy tie rod 52 are made of titanium alloy material to avoid being affected by the magnetic field, and can bear the weight of the coil assembly 30 and the cold screen assembly 20 and the load during transportation.

[0041] Optionally, the suspension assembly 50 also includes a first epoxy tie rod 53 and a second epoxy tie rod 54 perpendicularly distributed to the first epoxy tie rod 53. One end of the first epoxy tie rod 53 and the second epoxy tie rod 54 are respectively connected to the Dewar outer cylinder 11, and the other end passes through the cold shield outer cylinder 21 and is connected to the frame end plate 312. The arrangement of the first epoxy tie rod 53 and the second epoxy tie rod 54 further limits and fixes the coil assembly 30 and the cold shield assembly 20, and is used to bear the load during transportation.

[0042] Please see Figure 10 This embodiment provides a pair-type high-temperature superconducting device 1000, which includes a support frame 1001, a pair of high-temperature superconducting magnets 100 as described in any of the above embodiments, iron cores 200, and a drive system 300 for controlling the movement of the high-temperature superconducting magnets 100. The two iron cores 200 are coaxially spaced on the support frame 1001, and the pair of high-temperature superconducting magnets 100 are respectively sleeved on the two iron cores 200 and arranged in a mirror image. The drive system 300 controls the two high-temperature superconducting magnets 100 to move towards or away from each other to adjust the magnetic field strength formed between the two high-temperature superconducting magnets 100. Of course, for this pair-type high-temperature superconducting device 1000, another drive system can also be provided to drive the middle iron core 200 of the magnets to drive the two iron cores 200 to move relative to each other in the axial direction, so that the magnetic field strength has a larger adjustment range.

[0043] The parallel-type high-temperature superconducting device 1000 provided in this embodiment, through the setting of high-temperature superconducting magnets 100 and iron core 200, with the high-temperature superconducting magnets 100 arranged in pairs and mirror images, and controlled by the drive system 300 to move the two high-temperature superconducting magnets 100 in opposite directions, differs from traditional superconducting magnet devices in that the parallel-type high-temperature superconducting device 1000 in this embodiment, by setting the two high-temperature superconducting magnets 100 in mirror images, makes the air gap adjustment range larger and more convenient. At the same time, a magnetic field with a larger magnetic field strength can be formed between the two high-temperature superconducting magnets 100, thereby improving the adaptability of the device, especially for applications in high magnetic field scenarios. For the technical effects achieved by the high-temperature superconducting magnets 100 in this embodiment, please refer to the relevant descriptions of the above embodiments, which will not be repeated here.

[0044] In some embodiments, this embodiment provides a superconducting induction heating device, which includes a parallel-type high-temperature superconducting device 1000 as described in the above embodiment.

[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-temperature superconducting magnet, characterized in that, include: A Dewar assembly having a first through hole disposed on a central axis and a first annular cavity disposed around and spaced therefrom the first through hole, the first through hole being for the iron core to pass through, and the first annular cavity being sealed and vacuum disposed. A cold screen assembly is coaxially disposed within the first annular cavity. The cold screen assembly has a second through hole disposed on the central axis and a second annular cavity surrounding and spaced apart from the second through hole. A coil assembly includes a support frame, a cooling aluminum plate, and a double-panel coil. The support frame is disposed in a second annular cavity. The support frame includes an inner cylinder and end plates disposed opposite to each other at both ends of the inner cylinder. A coil cavity is formed between the two end plates. The two cooling aluminum plates are respectively disposed on opposite surfaces of the coil cavity. Multiple double-panel coils are stacked axially between the two cooling aluminum plates. The double-panel coil includes a ring-shaped cooling partition, an epoxy inner ring and an epoxy outer ring respectively disposed on the inner and outer edges of the cooling partition and protruding from one end face of the cooling partition, and a superconducting coil disposed between the epoxy inner ring and the epoxy outer ring. The cooling component is connected to the cooling screen component, the cooling aluminum plate, and the connecting ear, respectively. The cooling component is used to cool the superconducting coil so that the superconducting tape can maintain superconducting operation.

2. The high-temperature superconducting magnet according to claim 1, characterized in that, Multiple fastening screws are spaced around the coil cavity on the support frame. Each fastening screw passes through the cooling aluminum plate at both ends and is connected to the frame end plate to fix the multiple stacked double-pane coils.

3. The high-temperature superconducting magnet according to claim 1, characterized in that, The Dewar assembly includes an outer Dewar cylinder, an inner Dewar cylinder, an upper Dewar cover, and a lower Dewar cover. The inner Dewar cylinder is coaxially disposed inside the outer Dewar cylinder. The inner Dewar cylinder forms a first through hole that is axially arranged and allows the iron core to pass through. The upper Dewar cover and the lower Dewar cover are respectively disposed on the opposite end faces of the outer Dewar cylinder and the inner Dewar cylinder to form a first annular cavity that surrounds the first through hole and is sealed.

4. The high-temperature superconducting magnet according to claim 3, characterized in that, The cold screen assembly includes a cold screen outer cylinder, a cold screen inner cylinder, a cold screen upper cover, and a cold screen lower cover. The cold screen inner cylinder is coaxially disposed inside the cold screen outer cylinder. The cold screen inner cylinder forms a second through hole that is axially disposed and coaxially sleeved within the Dewar inner cylinder. The cold screen upper cover and the cold screen lower cover are respectively disposed on the opposite end faces of the cold screen outer cylinder and the cold screen inner cylinder to form a second annular cavity surrounding the through hole.

5. The high-temperature superconducting magnet according to claim 4, characterized in that, The outer end face of the Dewar tube is provided with a Dewar protrusion, and the outer tube of the cold shield is provided with a cold shield protrusion inside the Dewar protrusion; the refrigeration assembly includes a refrigeration unit disposed at the outer end of the Dewar protrusion, the output end of the refrigeration unit has a primary cold head and a secondary cold head, the primary cold head is connected to the cold shield protrusion in the first annular cavity, and the secondary cold head is connected to the coil assembly in the second annular cavity.

6. The high-temperature superconducting magnet according to claim 5, characterized in that, The support frame is provided with at least one main cold plate connected to the secondary cold head, and at least a portion of the main cold plate is connected to the two heat-conducting aluminum plates; each heat-conducting partition is provided with at least one connecting lug on its side end face, and each connecting lug is connected to the main cold plate through a soft copper heat-conducting component.

7. The high-temperature superconducting magnet according to claim 6, characterized in that, The high-temperature superconducting magnet also includes a suspension assembly, which includes a first titanium alloy tie rod and a second titanium alloy tie rod. One end of the first titanium alloy tie rod is connected to the lower cover of the Dewar, and the other end passes through the lower cover of the cold screen and is connected to the end plate of the skeleton. One end of the second titanium alloy tie rod is connected to the outer cylinder of the Dewar, and the other end passes through the outer cylinder of the cold screen and is connected to the end plate of the skeleton. Multiple first titanium alloy tie rods are perpendicular to the end plate of the skeleton and spaced apart, and at least two sets of second titanium alloy tie rods are respectively arranged at both ends of the inner cylinder of the skeleton.

8. The high-temperature superconducting magnet according to claim 7, characterized in that, The suspension assembly further includes a first epoxy tie rod and a second epoxy tie rod distributed perpendicularly to the first epoxy tie rod. One end of the first epoxy tie rod and the second epoxy tie rod are respectively connected to the Dewar outer cylinder, and the other end respectively pass through the cold screen outer cylinder and are connected to the skeleton end plate.

9. A pair-type high-temperature superconducting device, characterized in that, The device includes a pair of high-temperature superconducting magnets as described in any one of claims 1-8, iron cores, and a drive system for controlling the movement of the high-temperature superconducting magnets. The two iron cores are coaxially spaced apart, and the pair of high-temperature superconducting magnets are respectively sleeved on the two iron cores and arranged in a mirror image. The drive system adjusts the magnetic field strength formed between the two high-temperature superconducting magnets by controlling the two high-temperature superconducting magnets to move towards or away from each other.

10. A superconducting induction heating device, characterized in that, The superconducting induction heating device includes the parallel-type high-temperature superconducting device as described in claim 9.

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