CN216719638U - Ultrahigh-field liquid-helium-free magnet heat interception device and ultrahigh-field liquid-helium-free magnet - Google Patents
Ultrahigh-field liquid-helium-free magnet heat interception device and ultrahigh-field liquid-helium-free magnet Download PDFInfo
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- CN216719638U CN216719638U CN202122490886.0U CN202122490886U CN216719638U CN 216719638 U CN216719638 U CN 216719638U CN 202122490886 U CN202122490886 U CN 202122490886U CN 216719638 U CN216719638 U CN 216719638U
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Abstract
The utility model discloses an ultrahigh-field liquid-helium-free magnet heat interception device and an ultrahigh-field liquid-helium-free magnet. The ultra-high field liquid-helium-free magnet heat interception device and the ultra-high field liquid-helium-free magnet using the same have the advantages of simple structure, convenience in manufacturing and use, capability of timely conducting heat to the coil and the electrode of the ultra-high field liquid-helium-free magnet in real time, avoidance of damage to a refrigerator cold head, improvement of the use efficiency of the high field liquid-helium-free magnet and guarantee of the service life of the refrigerator cold head.
Description
Technical Field
The utility model relates to the technical field of ultra-high field liquid helium-free magnets, in particular to an ultra-high field liquid helium-free magnet heat interception device and an ultra-high field liquid helium-free magnet.
Background
The high-field liquid-free helium magnet coil can be in a superconducting state only when the temperature is below 77K, the high-temperature superconducting liquid-free helium magnet coil can be cooled only through a cold head, the high-temperature superconducting liquid-free helium magnet coil and the cold head are in mutual contact to cool, a high-temperature superconducting electrode in the excitation process needs to pass through a large current, the current cannot pass through the cold head, and the cold head can be damaged.
Therefore, in the process of cooling the high-temperature superconducting liquid-free helium magnet coil, timely cooling is usually performed between the surrounding structure or the external structure of the high-temperature superconducting coil, and the idea that the cooling liquid is filled between superconducting coils of superconductors to realize thermal break between the superconductors, keep the breaking efficiency of the superconductors and improve the cooling efficiency of the coil is disclosed in the Chinese patent CN102136338B in the prior art, which discloses a coil interface and a method for providing the stability of the coil.
In addition, there are also connection structures established between the connection structures of the high-temperature superconductor magnet coil itself to achieve rapid cooling of the coil, CN102449848A in the prior art, a superconducting connection device for the end pieces of two superconductors and a method for manufacturing the same, disclosing that the two superconductor connection locations each have at least one conductor core embedded in a matrix made of a normally conductive material, said conductor core being made of a superconducting MgB2 material and being directly surrounded by a barrier material, the construction of magnets suitable for high-intensity magnetic field applications requires the use of superconducting connections with higher current-carrying capacity in the magnetic field, achieving excellent superconducting electrical contacts, increasing the area, improving the contact, and increasing the current-carrying capacity.
However, in both of these configurations, the high temperature superconductor magnet coil still has the potential to quench during use. Therefore, the problems of the liquid helium-free magnet coil in the excitation process are as follows: how to lead the current to the cold head when the high-temperature superconducting electrode needs to pass through the large current, but still can guarantee that the cold head of the refrigerating machine can have better cooling performance on the premise of having better safety performance to the superconducting magnet coil, and avoid the phenomenon of damaging the cold head.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a refrigerating machine cold head for cooling a high-temperature superconducting electrode through heat interception, wherein hundreds of amperes of current are required to pass through the high-temperature superconducting electrode during excitation, the current cannot be conducted to a refrigerating machine, and the heat interception functions are cooling conduction, non-conductive ultrahigh-field liquid-free helium magnet heat interception device and an ultrahigh-field liquid-free helium magnet.
The technical scheme adopted by the utility model is as follows: an ultra-high field liquid helium-free magnet heat interception device,
comprises at least one first radiating fin connected with a cold head of the refrigerator,
and at least one second heat sink attached to the electrode of the coil,
and the heat conduction insulating layer is arranged between the first heat radiating fin and the second heat radiating fin in an insulating way.
Preferably, at least one of the first heat sink or the second heat sink is connected to the adjacent first heat sink or the adjacent second heat sink through a heat conducting insulating layer.
Preferably, one end of the first radiating fin is a free extension part fixedly connected with a cold head of the refrigerator, and the other end of the first radiating fin is connected with one end of the second radiating fin in an overlapped and isolated manner through the heat conducting insulating layer;
and the other end of the second radiating fin is a free extension part fixedly connected with the electrode of the coil.
Preferably, the first heat sink and the second heat sink are respectively in any one of a plate shape and a tubular shape.
Preferably, the first radiating fin and the second radiating fin are in a shape of a tube formed by winding a sheet, and a connecting hole is formed in a flattened structure after the free extending parts of the first radiating fin and the second radiating fin are flattened.
Preferably, the first heat sink and the second heat sink are sheet-shaped, and heat conducting and insulating holes are formed in the positions of the first heat sink, the second heat sink and the heat conducting and insulating layer, and heat conducting and insulating screws or bolts are supplied to penetrate through the heat conducting and insulating holes.
Preferably, the first heat radiating fins and the first heat radiating fins or the second heat radiating fins which are attached and connected with each other are connected through tin soldering surfaces respectively.
Preferably, the insulating layer is any one or a combination of a ceramic sheet, a capton film and a heat-conducting silica gel sheet.
Preferably, the first heat sink and the second heat sink are made of one or more of an aluminum sheet, a copper sheet and an iron sheet, and can also be made of other materials with good heat conduction and electric conductivity, as long as the heat sink and the second heat sink are ensured to have good heat conduction and electric conductivity.
Preferably, the first heat sink and the second heat sink are one of oxygen-free copper TU0, TU1 or TU 2.
The ultra-high field liquid helium-free magnet comprises a coil, two electrodes connected to two ends of the coil, and an excitation power supply connected with the two electrodes;
the heat interception device of any one of claims is connected between the high-temperature end or the low-temperature end of at least one electrode and the cold head of the refrigerator.
Preferably, the refrigerator cold head has a primary cold head and a secondary cold head;
and a heat interception device is connected between the high-temperature end of the at least one electrode and the primary cold head, and a heat interception device is connected between the low-temperature end of the at least one electrode and the secondary cold head.
Compared with the prior art, the utility model has the beneficial effects that:
the ultra-high field liquid helium-free magnet heat interception device is arranged between the electrode of the high-temperature superconducting coil and the cold head of the corresponding refrigerator, and is used for realizing the rapid cooling and transmission of the coil, and simultaneously ensuring that the heat on the coil and the electrode thereof can be transmitted to the cold head in time for cooling, the cold head absorbs the heat, the temperature of the cold head is reduced, and the heat interception is realized.
The ultrahigh-field liquid-helium-free magnet heat interception device can ensure that the superconductor magnet coil has better cooling performance and avoid damaging a cold head on the premise that the current can still not be led to the cold head even if the high-field liquid-helium-free magnet and the electrode thereof pass large current, but the cold head of a refrigerator can still have better safety performance on the superconductor magnet coil.
In conclusion, the ultra-high field liquid helium-free magnet heat interception device is simple in structure and convenient to manufacture and use, can timely conduct heat to the coil and the electrode of the ultra-high field liquid helium-free magnet in real time, avoids the damage to the cold head of the refrigerator, improves the use efficiency of the high field liquid helium-free magnet, and ensures the service life of the cold head of the refrigerator.
Drawings
FIG. 1 is a structural diagram of a usage state in which an ultra-high field liquid helium-free magnet heat interceptor is connected to a refrigerator cold head and electrodes of a high field liquid helium-free magnet;
FIG. 2 is a cross-sectional view of an embodiment of the ultra-high field liquid helium free magnet heat interceptor when both the first and second fins are plate-like;
FIG. 3 is a view of the embodiment of FIG. 2 in the direction A;
FIG. 4 is a state diagram of the connection structure of the embodiment of FIG. 2;
FIG. 5 is a schematic view of the location and area of the first and second heat sinks of the embodiment of FIG. 2;
FIG. 6 is a structural diagram of an embodiment where both the first and second fins of the ultra-high field liquid helium free magnet heat interceptor are tubular;
FIG. 7 is a block diagram of an embodiment of an ultra high field liquid helium-free magnet having 4 heat interceptors placed between the two electrodes 5 of the coil and the cold head 4 of the secondary refrigerator;
wherein: 1-first radiating fin, 2-second radiating fin, 3-heat conducting insulating layer, 4-refrigerator cold head, 5-electrode, 6-connecting hole, 7-heat conducting insulating hole, 8-heat conducting insulating screw or bolt, 9-coil, 10-tin welding surface, 11-overlapping part of first radiating fin and radiating fin, 12-flattening structure and 13-excitation power supply.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the combination or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description process of the embodiment of the present invention, the positional relationships of the devices such as "upper", "lower", "front", "rear", "left", "right", and the like in all the drawings are based on fig. 1.
As shown in fig. 1, the ultra-high field liquid helium-free magnet heat interceptor comprises at least one heat sink 1 connected to a cold head 4 of a refrigerator, and at least one second heat sink 2 attached to the electrode 5 of the coil 9, and a heat conductive insulating layer 3 interposed between the first heat sink 1 and the second heat sink 2 for insulation, thereby playing the role of insulating the first radiating fin 1 and the second radiating fin 2, but at the same time, the current interaction between the cold head of the refrigerator and the coil electrode is isolated due to the function of the heat conducting insulating layer 3, the large current generated by the high-temperature superconducting electrode can only be in the high-temperature superconducting electrode, but not to the cold head of the refrigerator, thereby ensuring that the large current generated by the high-temperature superconducting electrode can not impact the cold head of the refrigerator, the superconducting magnet electrode and the coil thereof have better cooling performance, the damage to the cold head of the refrigerator is avoided, and the service performance of the cold head of the refrigerator is improved. The structure of a specific heat intercepting apparatus can be seen in detail as in the embodiments of fig. 2 and 6.
As shown in fig. 1, the ultra-high field liquid helium-free magnet heat interceptor of the present invention is connected between two ends of two electrodes 5 of a coil 9 and a refrigerator cold head 4, and particularly for the electrodes connected with two cold heads (a primary cold head 41 and a secondary cold head 42), the high temperature end and the low temperature end of the electrodes are connected with one heat interceptor respectively, so as to achieve the sufficient protection of the refrigerator cold head. That is, the heat interception device is arranged between the electrode of the high-temperature superconducting coil and the cold head of the refrigerator corresponding to the electrode, and is used for realizing the rapid cooling transfer of the coil 9 and simultaneously ensuring that the heat on the coil 9 and the electrode thereof can be transferred to the cold head in time for cold cooling, the cold head absorbs the heat, the temperature of the cold head is reduced, and the heat interception is realized.
As shown in fig. 3 and 4, in the ultra-high field liquid helium-free magnet heat intercepting device, at least one of the heat dissipation fins 1 or at least one of the heat dissipation fins 2 is connected to the adjacent heat dissipation fin 1 or heat dissipation fin 2 by a heat conducting insulating layer 3; in the implementation, one heat sink I can be connected to the adjacent heat sink I1 or heat sink II 2 through a heat conduction insulating layer 3 in an overlapping mode, or two or more heat sinks I1 can be connected to the adjacent heat sink I1 or heat sink II 2 after being overlapped together. The connection mode of the second cooling fin 2 is the same as that of the first cooling fin 1, the common heat conduction performance of the first cooling fin 1 and the second cooling fin 2 can be further enhanced, and meanwhile, current can not be transmitted between the first cooling fin 1 and the second cooling fin 2, so that the large current on the electrode of the superconductor coil can not be transmitted to the cold head of the refrigerator all the time, and the cold head of the refrigerator is protected from impact.
As shown in fig. 3 and 4, one end of the first heat sink 1 is a free extension portion fixedly connected with the cold head 4 of the refrigerator, and the other end of the first heat sink is connected with one end of the second heat sink 2 in an overlapping and isolating manner through the heat-conducting insulating layer 3, so that heat transfer and insulating flow isolation are realized; meanwhile, the other end of the second radiating fin 2 is a free extension part fixedly connected with the electrode 5 of the coil, the connecting structure is relatively simple, and the connecting structure is convenient and quick to manufacture, install and use, and saves manufacturing and installing cost.
As shown in fig. 2, 3 and 6, the first heat sink 1 and the second heat sink 2 are respectively in a sheet shape or a tubular shape, and can achieve better heat insulation and electrical conduction effects, the specific shape requirements are determined according to the connection position space of the electrode of the coil and the cold head and the cold conduction requirements, and correspondingly, the shape of the heat conduction and insulation layer 3 is also adapted to the shapes of the first heat sink 1 and the second heat sink 2, so long as the corresponding heat insulation effect can be achieved and higher insulation can be achieved.
In the embodiment of the ultra-high field liquid helium-free magnet heat interceptor shown in fig. 6, the first cooling fin 1 and the second cooling fin 2 are in a shape of a tube wound in a sheet shape, and the connecting holes 6 are formed at the flattened structures 12 with flattened free extension parts, so that the ultra-high field liquid helium-free magnet heat interceptor can ensure better heat conduction performance and can be excellently connected with corresponding fixing structures.
As shown in fig. 2 and 5, the first heat sink 1 and the second heat sink 2 are in a sheet shape, heat conducting and insulating holes 7 are formed at the positions of the first heat sink 1, the second heat sink 2 and the heat conducting and insulating layer 3, and heat conducting and insulating screws or bolts 8 are supplied to penetrate through the heat conducting and insulating holes 7, so that the first heat sink 1, the second heat sink 2 and the heat conducting and insulating layer 3 are fixedly connected, and good heat conducting and insulating properties can be ensured.
In the embodiments of the ultra-high field liquid helium-free magnet heat interceptor shown in fig. 2 and 6, the first heat sink 1 and the first heat sink 1, or the first heat sink 1 and the second heat sink 2, or the second heat sink 2 and the second heat sink 2, which are attached to each other, are respectively connected by soldering surfaces, so that the first heat sink and the second heat sink can be better ensured to have better heat conductivity and better conductivity.
The insulating layer 3 is any one or combination of a ceramic sheet, a capton film and a heat-conducting silica gel sheet, and is heat-conducting and insulating.
In the embodiment of the ultra-high field liquid-helium-free magnet heat intercepting device in fig. 1 and 6, the first heat sink 1 and the second heat sink 2 are made of one of an aluminum sheet, a copper sheet and an iron sheet, and may be made of other materials with good heat conduction and electrical conductivity, as long as the materials have good heat conduction and electrical conductivity. The first cooling fin 1 and the second cooling fin 2 are made of one of oxygen-free copper TU0, TU1 or TU2, and both have good cooling performance and excellent conductivity.
As shown in fig. 1 and 7, the ultra-high field liquid helium-free magnet comprises a coil 9, two electrodes 5 connected to both ends of the coil, and an excitation power supply 13 connected to the two electrodes 5;
the heat interception device is connected between the high-temperature end or the low-temperature end of at least one electrode 5 and the cold head 4 of the refrigerator, and the ultra-high field liquid helium-free magnet has the advantages of good heat preservation performance, relatively low energy consumption and long service life of the cold head.
FIG. 7 is a block diagram of an embodiment of an ultra high field liquid helium-free magnet having 4 heat interceptors placed between the two electrodes 5 of the coil and the cold head 4 of the secondary refrigerator; the refrigerator cold head 4 is provided with a primary cold head 41 and a secondary cold head 42; at least one electrode 5, a heat interception device is connected between the high temperature end 51 and the first-stage cold head 41, and a heat interception device is connected between the low temperature end 52 and the second-stage cold head 42, so that the whole ultra-high field liquid-free helium magnet has a long service life, and the cold head connected with the magnet has a long service life.
The embodiments of the present invention are disclosed as the preferred embodiments, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes without departing from the spirit of the present invention.
Claims (12)
1. Super high field does not have liquid helium magnet heat interceptor, its characterized in that:
comprises at least one first radiating fin (1) connected with a cold head (4) of the refrigerator,
and at least one second heat sink (2) connected to the electrode (5) of the coil (9),
and the heat conduction insulating layer (3) is arranged between the first heat radiating fin (1) and the second heat radiating fin (2) in an insulating mode.
2. The ultra-high field liquid helium-free magnet heat interceptor of claim 1, wherein:
at least one first radiating fin (1) or at least one second radiating fin (2) is connected to the adjacent first radiating fin (1) or second radiating fin (2) through a layer of heat conducting insulating layer (3) in an overlapping mode.
3. The ultra-high field liquid helium-free magnet heat interceptor device of claim 2, wherein:
one end of the first radiating fin (1) is a free extension part fixedly connected with a cold head (4) of the refrigerator, and the other end of the first radiating fin (1) is connected with one end of the second radiating fin (2) in an overlapped and isolated manner through a heat conducting insulating layer (3);
meanwhile, the other end of the second radiating fin (2) is a free extension part fixedly connected with an electrode (5) of the coil.
4. The ultra-high field liquid helium free magnet heat interceptor of claim 3, wherein:
the first radiating fin (1) and the second radiating fin (2) are respectively in any one of a sheet shape or a tubular shape.
5. The ultra-high field liquid helium-free magnet heat interceptor of claim 4, wherein:
the first radiating fin (1) and the second radiating fin (2) are in a tube shape formed by winding sheet-shaped materials, and connecting holes (6) are formed in the flattened structure (12) after the free extending parts are flattened.
6. The ultra-high field liquid helium-free magnet heat interceptor of claim 4, wherein:
the heat radiating fin I (1) and the heat radiating fin II (2) are in a sheet shape, heat conducting insulating holes (7) are formed in the positions of the heat radiating fin I (1), the heat radiating fin II (2) and the heat conducting insulating layer (3), and heat conducting insulating screws or bolts (8) are supplied to penetrate through the heat conducting insulating holes (7).
7. The ultra-high field liquid helium-free magnet heat interceptor of any one of claims 1-5, wherein:
the mutually attached and connected radiating fins I (1) and the radiating fins I (1), or the radiating fins I (1) and the radiating fins II (2), or the radiating fins II (2) and the radiating fins II (2) are respectively connected through the tin welding surfaces 10.
8. The ultra-high field liquid helium-free magnet heat interceptor of claim 7, wherein:
the insulating layer (3) is any one or combination of a ceramic sheet or a capton film and a heat-conducting silica gel sheet.
9. The ultra-high field liquid helium free magnet heat interceptor of claim 8, wherein:
the first radiating fin (1) and the second radiating fin (2) are made of one of aluminum sheets, copper sheets and iron sheets.
10. The ultra-high field liquid helium-free magnet heat interceptor device of claim 9, wherein: the first cooling fin (1) and the second cooling fin (2) are made of one of oxygen-free copper TU0, TU1 or TU 2.
11. Ultra-high field does not have liquid helium magnet, including coil (9) and connect two electrodes (5) at coil (9) both ends to and excitation power supply (13) of connecting two electrodes (5), its characterized in that:
the heat interception device of any one of claims 1 to 10 is connected between the high temperature end or the low temperature end of at least one of the electrodes (5) and the cold head (4) of the refrigerator.
12. The ultra-high field liquid-free helium magnet of claim 11, wherein:
the refrigerator cold head (4) is provided with a primary cold head (41) and a secondary cold head (42);
at least one electrode (5) is connected with a heat interception device between the high-temperature end (51) and the primary cold head (41), and connected with a heat interception device between the low-temperature end (52) and the secondary cold head (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122490886.0U CN216719638U (en) | 2021-10-16 | 2021-10-16 | Ultrahigh-field liquid-helium-free magnet heat interception device and ultrahigh-field liquid-helium-free magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122490886.0U CN216719638U (en) | 2021-10-16 | 2021-10-16 | Ultrahigh-field liquid-helium-free magnet heat interception device and ultrahigh-field liquid-helium-free magnet |
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| Publication Number | Publication Date |
|---|---|
| CN216719638U true CN216719638U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122490886.0U Active CN216719638U (en) | 2021-10-16 | 2021-10-16 | Ultrahigh-field liquid-helium-free magnet heat interception device and ultrahigh-field liquid-helium-free magnet |
Country Status (1)
| Country | Link |
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| CN (1) | CN216719638U (en) |
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2021
- 2021-10-16 CN CN202122490886.0U patent/CN216719638U/en active Active
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