CN205428618U - Superconductive magnet - Google Patents
Superconductive magnet Download PDFInfo
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- CN205428618U CN205428618U CN201620268995.4U CN201620268995U CN205428618U CN 205428618 U CN205428618 U CN 205428618U CN 201620268995 U CN201620268995 U CN 201620268995U CN 205428618 U CN205428618 U CN 205428618U
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Abstract
The utility model provides a superconductive magnet, it includes: the vacuum vessel, be provided with cold screen and superconducting coil in the vacuum vessel, superconducting coil is formed by superconducting wire coiling on coil skeleton, the closed superconducting circuit of formation is connected through superconductive joint and superconductive switch to superconducting coil's two free ends, superconductive magnet still includes: set up in refrigerator on the vacuum vessel, the refrigerator includes one -level cold head and second grade cold head, the one -level cold head with the hot link of cold screen, wherein, the material of superconducting wire is the superconducting material that critical [superconducting] transition temperature is higher than 35K, superconductive joint is made by the superconductive solder of low melting, superconductive joint passes through second grade cold head or coolant cooling ensure that it is in the superconducting state. The low temperature closed loop superconductive magnet in prior art compares, the utility model provides a superconductive magnet's superconductive stability is higher.
Description
Technical field
This utility model relates to superconducting magnet technical field, particularly relates to the superconducting magnet of a kind of operation with closed ring, and this magnet can be used for making the utility units such as NMR (Nuclear Magnetic Resonance)-imaging superconducting magnet, magnetic concentration superconducting magnet, sewage disposal superconducting magnet, superconducting magnetic energy storage.
Background technology
Existing practical superconducting magnet, such as NMR (Nuclear Magnetic Resonance)-imaging superconducting magnet, superconducting coil is typically formed by niobium titanium superconducting line coiling, and its cooling medium typically uses liquid helium.Niobium titanium alloy belongs to low temperature superconducting material, and its critical superconductive transition temperature is about 9K, and the boiling point that liquid helium is under 1 atmospheric pressure is 4.2K, and two temperature difference are only less than 5K, it is easy to owing to ambient temperature occurs fluctuation to cause superconducting coil to quench.
Therefore, in order to improve the superconducting stability of superconducting magnet, need the superconductor that employing critical superconductive transition temperature is higher to substitute niobium titanium superconductor to make superconducting magnet.But, the higher superconductor of some critical superconductive transition temperature of having now been found that causes it can not apply in superconducting magnet due to a variety of causes.
Such as: a series of high temperature superconducting materias found since 1986, its critical superconductive transition temperature is all significantly larger than the critical superconductive transition temperature of niobium titanium superconductor, but owing to the superconduction coherence length of high temperature superconducting materia is the shortest, it is difficult in engineering be directly connected to the two ends of superconducting line, make obtained superconducting joint reach the superconductivity the same with superconducting line itself, therefore cause the closed loop application of high temperature superconducting materia to be restricted.
And for example: the magnesium diboride super conductive material found for 2000, its critical superconductive transition temperature is 39K, significantly larger than 4.2K, and magnesium diboride raw material is cheap, and wire manufacturing process is simple, has great application prospect, most possible replacement niobium titanium superconducting line.But, for over ten years, due to the difficulty in processing technology, until the performance of current superconducting joint still can not reach the requirement of actual application, thus limit the large-scale application of this kind of material.
Utility model content
Based on problem above, this utility model provides a kind of new superconducting magnet, on the one hand, can improve the stability of superconducting magnet, on the other hand, can be greatly expanded the range of application of high-tc-super conductor material.
The utility model proposes the material that niobium titanium superconductor is changed to has higher critical superconductive transition temperature, owing to the critical superconductive transition temperature of these materials is much higher compared with niobium titanium alloy, add the difference of itself and superconducting magnet running temperature, the stability of superconducting magnet can be greatly improved.Meanwhile, this utility model also promotes the update of superconductor.
The technology premise realizing this replacement is to make qualified superconducting joint, and in order to reach this purpose, this utility model adopts the technical scheme that
A kind of superconducting magnet, including: Dewar vessel, it is provided with cold screen and superconducting coil in described Dewar vessel；
Described superconducting coil is wound on coil rack by superconducting line and makes, and two free ends of described superconducting coil are connected formation Guan Bi superconducting circuit by superconducting joint with superconducting switch；
Described superconducting magnet also includes: be arranged at the refrigeration machine on described Dewar vessel, and described refrigeration machine includes one-level cold head and two grades of cold heads, described one-level cold head and described cold screen thermally coupled；
Wherein, the material of described superconducting line is the critical superconductive transition temperature superconductor higher than 35K；
Described superconducting joint is made up of low melting point superconduction solder, and described superconducting joint is cooled down by described two grades of cold heads or cooling medium.
Alternatively, the described critical superconductive transition temperature superconductor higher than 35K is magnesium diboride or high temperature superconducting materia.
Alternatively, described high temperature superconducting materia includes Y-Ba-Cu-O compound, bismuth-lead--strontium-calcium-copper-oxygen compound, thallium-barium-calcium-copper-oxygen compound and hydrargyrum-barium-calcium-copper-oxygen compound.
Alternatively, described low melting point superconduction solder is Wood alloy lead-cadmium-bismuth-stannum, simple metal indium or the alloy of indium.
Alternatively, described superconducting joint and described two grades of direct thermally coupleds of cold head, so that described two grades of cold heads directly cool down described superconducting joint, making the solder in superconducting joint be in superconducting state, the most described two grades of cold heads maintain the operating temperature of described superconducting coil to be in below critical superconductive transition temperature by heat exchange pattern.
Alternatively, described superconducting magnet also includes being positioned at the low-temperature (low temperature) vessel inside described cold screen, and described two grades of cold heads and described superconducting coil are arranged in described low-temperature (low temperature) vessel, include cooling medium in described low-temperature (low temperature) vessel.
Alternatively, described cooling medium is helium, and the helium in described low-temperature (low temperature) vessel maintains the vapor-liquid two phases system of 4.2K and 1 normal atmosphere, and this system maintains described superconducting coil operating temperature less than 35K.
Alternatively, described cooling medium is liquid helium, and described superconducting switch and superconducting joint are by described liquid helium submergence.
Alternatively, when using gas helium cooling superconducting coil, described superconducting switch and superconducting joint are positioned at bottom low-temperature (low temperature) vessel and for the submergence of liquid helium institute.
Alternatively, described superconducting magnet also includes: be positioned at the liquid nitrogen container outside described cold screen, being contained with liquid nitrogen, described superconducting coil and described superconducting switch in described liquid nitrogen container to be immersed in the liquid nitrogen in described liquid nitrogen container, described superconducting joint is directly connected to described two grades of cold heads.
Compared to prior art, this utility model has the advantages that
The superconducting magnet that this utility model provides, it includes superconducting coil, and the two ends of the superconducting line on this superconducting coil are welded together by the superconducting joint being fabricated to by solder, thus define closed loop superconducting circuit.The superconductor being higher than 35K by critical superconductive transition temperature for the superconducting line of this superconducting coil of coiling is made.Therefore, this superconducting coil can keep superconduction current-carring characteristic under the operating temperature less than 35K.This superconducting magnetic physical ability reaches techniques below effect: (1) is when the running temperature of superconducting magnet maintains 4.2K, owing to the critical superconductive transition temperature of superconductor differs bigger with magnet running temperature, superconducting magnet more of the prior art, the superconducting stability of superconducting magnet described in the utility model relatively prior art is high, it is not easy to quench；(2) when the running temperature of superconducting magnet maintains higher temperature operation, such as when superconducting magnet is when running close to the critical superconductive transition temperature of superconductor, owing to superconducting joint is connected on two grades of cold heads, although the solder of superconducting joint is low temperature superconducting material, remain at superconducting state, the closed loop superconduction running status of whole superconducting coil can be maintained.
Accompanying drawing explanation
In order to be more clearly understood from detailed description of the invention of the present utility model, the accompanying drawing used when this utility model detailed description of the invention is described below does a brief description.It should be evident that these accompanying drawings are only section Example of the present utility model, those skilled in the art can also obtain the flexible program of these accompanying drawings on the premise of not paying creative work.
Fig. 1 is the structural representation of the superconducting magnet that this utility model embodiment one provides；
Fig. 2 is the 3-D solid structure schematic diagram of the superconduction closed-loop path that this utility model embodiment provides；
Fig. 3 is the structural representation of the superconducting magnet that this utility model embodiment two provides；
Fig. 4 is the structural representation of the superconducting magnet that this utility model embodiment three provides.
Detailed description of the invention
In order to be more clearly understood from the purpose of this utility model, technical scheme and technique effect, below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described in detail.In the accompanying drawings, the most same or similar label represents same or similar structure or has the structure of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining this utility model, and can not be construed to restriction of the present utility model.
Additionally, this utility model can in different detailed description of the invention repeat reference numerals and/or letter.This repetition is for purposes of simplicity and clarity, the relation between itself not indicating discussed various embodiment and/or arranging.
Embodiment one
Fig. 1 is the structural representation of the superconducting magnet that this utility model embodiment provides.As it is shown in figure 1, this superconducting magnet includes: Dewar vessel 01, being provided with cold screen 02 and superconducting coil 30 in this Dewar vessel 01, wherein, superconducting coil 30 is positioned at the inner side of cold screen 02.
The effect of cold screen 02 is to reduce room temperature to leak heat to the radiation of superconducting coil 30.
In this utility model embodiment, the material of Dewar vessel 01 can be rustless steel, it is of course also possible to use other nonmagnetic substance in addition to rustless steel.It addition, the pressure container standard that Dewar vessel 01 all can use China relevant manufactures, such that it is able to be prevented effectively from the inefficacy of Dewar vessel 01, it is ensured that superconducting magnet properly functioning.
In addition, also including the refrigeration machine 04 being arranged on described Dewar vessel 01 in the superconducting magnet that this utility model embodiment provides, this refrigeration machine 04 includes one-level cold head 41 and two grades of cold heads 42, wherein, one-level cold head 41 is connected with cold screen heat 02, and two grades of cold heads 42 are positioned at the inner side of cold screen 02.
As it is shown in figure 1, described superconducting coil 30 is formed by superconducting line coiling on coil rack 31, two free ends of superconducting coil 30 connect formation Guan Bi superconducting circuit 03 by superconducting joint 32 and superconducting switch 33.In order to be more clearly understood from the Guan Bi superconducting circuit 03 of this utility model embodiment, Fig. 2 shows the 3-D solid structure of the Guan Bi superconducting circuit of formation.As shown in Figure 2, comprising: superconducting coil 30, coil rack 31, superconducting joint 32 and superconducting switch 33, wherein, superconducting switch 33 is coupled together by two free ends of the superconducting line 34 of winding superconducting coil 30 respectively by superconducting joint 32 and 32, forms a Guan Bi superconducting circuit.
In this utility model embodiment, the material of winding superconducting coil 30 can be high temperature superconducting materia, and so-called high temperature superconducting materia is to have high critical superconductive transition temperature (Tc), the superconductor that just can work in liquid nitrogen temperature.Cause mainly oxide material, therefore the critical superconductive transition temperature also known as high-temperature oxide superconducting material, i.e. high temperature superconducting materia can reach more than 77K.As example, high temperature superconducting materia can include Y-Ba-Cu-O compound, bismuth-lead--strontium-calcium-copper-oxygen compound, thallium-barium-calcium-copper-oxygen compound and hydrargyrum-barium-calcium-copper-oxygen compound.
In this utility model embodiment, superconducting joint 32 is made up of low melting point superconduction solder.More specifically, this low melting point superconduction solder can be Wood alloy lead-cadmium-bismuth-stannum (Pb-Cd-Bi-Sn), simple metal indium or the alloy of indium.The requirement of actual application should can be reached by the performance of the superconducting joint 32 of low melting point superconduction solder welding.
In this utility model embodiment, so that the solder belonging to low temperature superconducting material in superconducting joint 32 is in superconducting state, as it is shown in figure 1, superconducting joint 32 is directly connected to two grades of cold heads 42, directly cooled down superconducting joint 32 by two grades of cold heads 42.And, superconducting line 34 critical superconductive transition temperature because being made up of high temperature superconducting materia is higher, can utilize two grades of cold heads 42, by superconducting joint 32, superconducting coil is carried out conduction cooling, by conduction type of cooling cooling superconducting coil, its operating temperature can be made to control at below 70K.Owing to the critical superconductive transition temperature of high temperature superconducting materia is generally at more than 90K, the operating temperature of below 70K is less than the critical superconductive transition temperature of superconducting line, the superconducting coil enabling to this utility model embodiment is in superconducting state, thus maintains superconducting coil in the stable operation of closed loop states.
The concrete structure of the superconducting magnet provided for this utility model embodiment one above.In this concrete structure, couple together by being welded the two ends of the superconducting line 34 that high temperature superconducting materia can be made by the superconducting joint 32 formed by low melting point superconduction solder, so that the superconducting line that this high temperature superconducting materia is made can be at superconducting state operation with closed ring, thus the application breaching high temperature superconducting materia limits, it is achieved that the possibility that high temperature superconducting materia uses under closed loop conditions.So, the superconducting magnet that this utility model provides breaches the high temperature superconducting materia high temperature use of those skilled in the art, and the usual thinking model of low temperature superconducting material low temperature, this utility model has started the New Times of Practical High-Temperature Superconducting Materials.
Additionally, owing to high temperature superconducting materia is applied in low temperature environment, its critical superconductive transition temperature is bigger with the difference of its running temperature, the flux jumping phenomenon causing superconducting magnet to quench can be made effectively to be suppressed, compared to superconducting magnet of the prior art, the superconducting stability of the superconducting magnet that this utility model provides is higher.
High temperature superconducting materia is used for low temperature environment, and its critical current density is significantly increased, it is also possible to effectively reduces the length of wire used by coiling magnet, thus reduces the construction cost of magnet.
It is worthwhile to note that the superconducting magnet that this utility model embodiment provides can be applied in nmr imaging technique field, use as NMR (Nuclear Magnetic Resonance)-imaging superconducting magnet.It addition, the superconducting magnet that this utility model embodiment provides utilizes heat exchange pattern to maintain the cold operation environment of superconducting magnet by the two of refrigeration machine grades of cold heads, use liquid helium can be exempted, advantageously reduce the cost of raw material and reduce the dependence to helium resource.
Additionally, due in this utility model embodiment, the critical superconductive transition temperature of the superconducting line being made up of high temperature superconducting materia is higher, differ bigger with operating temperature, therefore, cheap small-sized refrigerating mechanism cold is used can to maintain the cryogenic operating temperatures of superconducting magnet, therefore, for from the side, the superconducting magnet that this utility model provides can reduce hardware cost.
As the modification of this utility model embodiment, high temperature superconducting materia described above could alternatively be magnesium diboride, and when the superconducting line of superconducting coil is made up of magnesium diboride material, the temperature of superconducting coil controls at below 39K.
The detailed description of the invention of the superconducting magnet provided for this utility model embodiment one above, in this embodiment, superconducting line utilizes two grades of cold heads of refrigeration machine to realize cooling by the way of conduction of heat.As the extension of this utility model embodiment, superconducting line can realize cooling, referring specifically to embodiment two in the way of using cooling medium such as liquid nitrogen.
Embodiment two
Need explanation, superconducting magnet described in embodiment two has many similarities with the superconducting magnet described in embodiment one, for the sake of brevity, its difference is only described in detail by this utility model embodiment, and its similarity refers to the associated description of embodiment one.
Fig. 3 is the structural representation of the superconducting magnet that this utility model embodiment two provides.As it is shown on figure 3, this superconducting magnet includes: Dewar vessel 01, cold screen 02, superconducting coil 30 and refrigeration machine 04, additionally, this superconducting magnet can also include liquid nitrogen container 05.Wherein, liquid nitrogen container 05 is arranged on inner side and the outside of cold screen 02 of Dewar vessel 01, is contained with the liquid nitrogen of submergence superconducting coil 30 in liquid nitrogen container 05.
In this utility model embodiment, two grades of cold heads 42 of refrigeration machine 04 are positioned at outside liquid nitrogen container, and the superconducting joint 32 in direct thermally coupled superconducting circuit 03, and therefore, this superconducting joint 32 is cooled down by two grades of cold heads 42 so that it is temperature maintains 4.2K.Superconducting coil 30 is positioned at liquid nitrogen container 05, and this superconducting coil 30 is immersed in the liquid nitrogen in liquid nitrogen container, makes the temperature of superconducting coil 30 maintain below its critical superconductive transition temperature by liquid nitrogen cooling.
In this utility model embodiment, superconducting switch 33 is also disposed in liquid nitrogen container, and is immersed in liquid nitrogen container.Two superconducting line free ends 34 of superconducting coil 30 through liquid nitrogen container wall with liquid nitrogen container 05 outside superconducting joint 32 be connected, the superconducting switch 33 that then be will be located in liquid nitrogen container 05 by superconducting line is coupled together, and forms one and closes superconducting circuit 03.Wherein, two superconducting line free ends 34 of superconducting coil 30 realize the sealing to liquid nitrogen container through during liquid nitrogen container wall by electric insulation, vacuum sealing material 100.
The detailed description of the invention of the superconducting magnet provided for this utility model embodiment two above.In this embodiment, superconducting joint and two grades of direct thermally coupleds of cold head, by the thermal conduction mechanism of two grades of cold heads, the temperature of superconducting joint is maintained 4.2K, and superconducting coil is cooled down by liquid nitrogen so that it is temperature maintains below critical superconductive transition temperature.This embodiment has the effect identical with embodiment one embodiment.At present, one of price percentage being less than liquid helium of every liter of liquid nitrogen, use liquid nitrogen to do coolant, the operating cost of superconducting magnet, and the problem not having resource scarcity can be substantially reduced.This embodiment is especially suitable for being applied on the magnet that energy storage is bigger, such as high-temperature superconducting energy storage device.
The specific implementation of the superconducting magnet provided for this utility model embodiment one and embodiment two above.In these two detailed description of the invention, the material that superconducting line uses is all high temperature superconducting materia.As another embodiment of the present utility model, the material of superconducting line can also be magnesium diboride.Referring specifically to embodiment three.
Embodiment three
Need explanation, superconducting magnet described in embodiment three has many similarities with the superconducting magnet described in embodiment one, for the sake of brevity, its difference is only described in detail by this utility model embodiment, and its similarity refers to the associated description of embodiment one.
Fig. 4 is the superconducting magnet structure schematic diagram that this utility model embodiment three provides.As shown in Figure 4, this superconducting magnet includes: Dewar vessel 01, cold screen 02, superconducting coil 30 and refrigeration machine 04, in addition, it can include low-temperature (low temperature) vessel 06.Low-temperature (low temperature) vessel 06 is arranged on the inner side of cold screen 02, and wherein, two grades of cold heads 42 and described superconducting coil 30 are arranged in described low-temperature (low temperature) vessel 06, include cooling medium (not shown in Fig. 4) in described low-temperature (low temperature) vessel 06.This cooling medium is used for cooling down superconducting coil 30.
It is to be appreciated that in this utility model embodiment, Dewar vessel 01, the structure of cold screen 02 and refrigeration machine 04 and the Dewar vessel 01 in embodiment one, cold screen 02, superconducting coil 30 are identical with the structure of refrigeration machine 04, for the sake of brevity, are not described in detail at this.It addition, in this utility model embodiment, two grades of cold heads 42 can not be directly connected to the superconducting joint 32 on superconduction closed-loop path 03, and certainly, both can also be directly linked together.
In this utility model embodiment, the structure of superconducting coil 30 is essentially identical with the structure of the superconducting coil shown in above-mentioned Fig. 2, and its difference is, in this utility model embodiment, the material of the superconducting line of composition superconducting coil 30 is magnesium diboride.Owing to the critical superconductive transition temperature of magnesium diboride is 39K, in order to maintain superconducting coil to be in superconducting state, the superconducting coil operating temperature that this utility model provides should be less than 39K, and in order to ensure superconducting stability, the superconducting coil operating temperature that this utility model provides is less than 20K.
So, in order to maintain magnesium diboride to be in superconducting state, and then the stability of maintenance superconducting coil cold operation environment, this utility model embodiment can use gas helium as the cooling medium of superconducting magnet.Specifically, it is contained with a certain amount of liquid helium in the bottom of low-temperature (low temperature) vessel 06, is in dynamic thermal balance state with the dependence convection heat transfer' heat-transfer by convection of overhead gas helium.Be in superconducting state in order to ensure superconducting joint and superconducting switch, superconducting joint and superconducting switch be arranged on the bottom of low-temperature (low temperature) vessel, and make to remain in the liquid helium bottom low-temperature (low temperature) vessel can superconducting joint and superconducting switch described in submergence.
Owing to making the critical superconductive transition temperature of the material magnesium diboride of superconducting line higher (39K), so, superconducting coil, without being immersed in liquid helium, utilizes gas helium cooling to stabilize it and maintains superconducting state.So, in this utility model embodiment, liquid helium can provide the working environment of this utility model superconducting magnet without the whole superconducting coil of submergence, only submergence superconducting joint and superconducting switch.So, from the side for, compared to using the scheme of liquid helium cooling superconducting coil in prior art, the superconducting magnet that this utility model provides also is able to reduce the consumption of helium, reduces the universal of the cost of superconducting magnet, beneficially superconducting magnet.
The detailed description of the invention of the superconducting coil provided for this utility model embodiment three above.In this specific embodiment, couple together by being welded two free ends of the superconducting coil 30 that magnesium diboride can be made by the superconducting joint 32 formed by low melting point superconduction solder, so that the superconducting line should being made up of magnesium diboride can be at superconducting state operation with closed ring, the extensively application for magnesium diboride provides possibility.And the raw material manufacturing magnesium diboride super conductive material relatively manufactures the raw material considerably cheaper of niobium titanium superconductor, therefore, uses magnesium diboride to manufacture superconducting wire and can reduce the manufacturing cost of superconducting magnet.
Additionally, the critical superconductive transition temperature of magnesium diboride is 39K, its critical superconductive transition temperature is bigger with the difference of its running temperature, the flux jumping causing magnet quenching can be made effectively to be suppressed, compared to superconducting magnet of the prior art, the superconducting stability of the superconducting magnet that this utility model provides is higher.
The superconducting magnet that this utility model embodiment three provides can also be applied in nmr imaging technique field, uses as NMR (Nuclear Magnetic Resonance)-imaging superconducting magnet.
Additionally, as the modification of this utility model embodiment, it would however also be possible to employ liquid helium cools down whole superconducting coil, now, the whole superconducting coil of liquid helium submergence as cooling medium.In this case, liquid helium can be filled with in whole low-temperature (low temperature) vessel, at this moment the position of superconducting joint and superconducting switch is it is not necessary to be placed on the bottom of low-temperature (low temperature) vessel, and in this specific embodiment, superconducting joint and superconducting switch may be located at can be by any position of liquid helium institute submergence.
It addition, as another modification of this utility model embodiment three, it is also possible to the material magnesium diboride making superconducting line is replaced with the high temperature superconducting materia described in embodiment one.This is because, the critical superconductive transition temperature of high temperature superconducting materia is higher than the critical superconductive transition temperature of magnesium diboride, the superconducting magnet that embodiment three provides, it runs low temperature environment and is meeting on the premise of magnesium diboride is in superconducting state, it is possible to meets high temperature superconducting materia and is in the condition of superconducting state.Modification accordingly, as embodiment three, it is also possible to the material magnesium diboride making superconducting line is replaced with the high temperature superconducting materia described in embodiment one or embodiment two.
It should be noted that embodiment one and embodiment three respectively by superconducting line by the detailed description of the invention that superconducting magnet is described as a example by high temperature superconducting materia and magnesium diboride.It practice, in this utility model embodiment, be not limited to high temperature superconducting materia described above and magnesium diboride for making the material of superconducting line.As the extension of this utility model embodiment, as long as in the material making superconducting line, its critical superconductive transition temperature is all capable of utility model purpose of the present utility model higher than 35K.It is to say, when the material of superconducting line is the critical superconductive transition temperature material higher than 35K, utility model purpose of the present utility model can be realized.
It it is more than preferred embodiment of the present utility model.It should be pointed out that, to those skilled in the art, on the premise of conceiving without departing from this utility model utility model, it is also possible to making some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (10)
1. a superconducting magnet, it is characterised in that including: Dewar vessel, is provided with cold screen and superconducting coil in described Dewar vessel；
Described superconducting coil is formed by superconducting line coiling on coil rack, and two free ends of described superconducting coil are connected formation Guan Bi superconducting circuit by superconducting joint with superconducting switch；
Described superconducting magnet also includes: be arranged at the refrigeration machine on described Dewar vessel, and described refrigeration machine includes one-level cold head and two grades of cold heads, described one-level cold head and described cold screen thermally coupled；
Wherein, the material of described superconducting line is the critical superconductive transition temperature superconductor higher than 35K；
Described superconducting joint is made up of low melting point superconduction solder, and described superconducting joint is cooled down by described two grades of cold heads or cooling medium.
Superconducting magnet the most according to claim 1, it is characterised in that the described critical superconductive transition temperature superconductor higher than 35K is magnesium diboride or high temperature superconducting materia.
Superconducting magnet the most according to claim 2, it is characterised in that described high temperature superconducting materia includes Y-Ba-Cu-O compound, bismuth-lead--strontium-calcium-copper-oxygen compound, thallium-barium-calcium-copper-oxygen compound and hydrargyrum-barium-calcium-copper-oxygen compound.
Superconducting magnet the most according to claim 1, it is characterised in that described low melting point superconduction solder is Wood alloy lead-cadmium-bismuth-stannum, simple metal indium or the alloy of indium.
5. according to the superconducting magnet described in any one of claim 1-4, it is characterized in that, described superconducting joint and described two grades of direct thermally coupleds of cold head, so that described two grades of cold heads directly cool down described superconducting joint, making the solder in superconducting joint be in superconducting state, the most described two grades of cold heads maintain the operating temperature of described superconducting coil to be in below critical superconductive transition temperature by heat exchange pattern.
6. according to the superconducting magnet described in any one of claim 1-4, it is characterized in that, described superconducting magnet also includes being positioned at the low-temperature (low temperature) vessel inside described cold screen, and described two grades of cold heads and described superconducting coil are arranged in described low-temperature (low temperature) vessel, include cooling medium in described low-temperature (low temperature) vessel.
Superconducting magnet the most according to claim 6, it is characterised in that described cooling medium is the vapor-liquid two phases system of helium, this system maintains described superconducting coil operating temperature less than 35K.
Superconducting magnet the most according to claim 6, it is characterised in that described cooling medium is liquid helium, described superconducting switch and superconducting joint are by described liquid helium submergence.
Superconducting magnet the most according to claim 6, it is characterised in that when using gas helium cooling superconducting coil, described superconducting switch and superconducting joint are positioned at bottom low-temperature (low temperature) vessel and for the submergence of liquid helium institute.
10. according to the superconducting magnet described in any one of claim 1-4, it is characterized in that, described superconducting magnet also includes: be positioned at the liquid nitrogen container outside described cold screen, it is contained with liquid nitrogen in described liquid nitrogen container, described superconducting coil and described superconducting switch are immersed in the liquid nitrogen in described liquid nitrogen container, and described superconducting joint is directly connected to described two grades of cold heads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620268995.4U CN205428618U (en) | 2016-03-31 | 2016-03-31 | Superconductive magnet |
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| CN201620268995.4U CN205428618U (en) | 2016-03-31 | 2016-03-31 | Superconductive magnet |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655084A (en) * | 2016-03-31 | 2016-06-08 | 宁波健信机械有限公司 | Superconducting magnet |
| CN109887701A (en) * | 2019-03-06 | 2019-06-14 | 上海交通大学 | A kind of superconducting magnet refrigerating mechanism and application method for levitated superconducting magnet train |
| CN110957099A (en) * | 2019-12-27 | 2020-04-03 | 西部超导材料科技股份有限公司 | Superconducting magnet with four-corner-shaped coils for magnetically controlled Czochralski single crystal pulling and method thereof |
-
2016
- 2016-03-31 CN CN201620268995.4U patent/CN205428618U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655084A (en) * | 2016-03-31 | 2016-06-08 | 宁波健信机械有限公司 | Superconducting magnet |
| CN105655084B (en) * | 2016-03-31 | 2018-06-08 | 宁波健信核磁技术有限公司 | A kind of superconducting magnet |
| CN109887701A (en) * | 2019-03-06 | 2019-06-14 | 上海交通大学 | A kind of superconducting magnet refrigerating mechanism and application method for levitated superconducting magnet train |
| CN109887701B (en) * | 2019-03-06 | 2021-01-01 | 上海交通大学 | Superconducting magnet cooling device for superconducting magnetic suspension train and use method |
| CN110957099A (en) * | 2019-12-27 | 2020-04-03 | 西部超导材料科技股份有限公司 | Superconducting magnet with four-corner-shaped coils for magnetically controlled Czochralski single crystal pulling and method thereof |
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