CN208580630U - Superconducting magnet second level cooling device - Google Patents
Superconducting magnet second level cooling device Download PDFInfo
- Publication number
- CN208580630U CN208580630U CN201820438628.3U CN201820438628U CN208580630U CN 208580630 U CN208580630 U CN 208580630U CN 201820438628 U CN201820438628 U CN 201820438628U CN 208580630 U CN208580630 U CN 208580630U
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- Prior art keywords
- superconducting magnet
- cooling
- liquid helium
- cooling line
- helium vessel
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Abstract
The utility model relates to one kind, and superconducting coil can either be made to drop to required ultra low temperature state from room temperature, the superconducting magnet second level cooling device of the solid-state grain of other gas coolings formation will not be generated in liquid helium vessel and in superconducting coil device again, including superconducting magnet refrigerating mechanism, cooling line is equipped in liquid helium vessel in the superconducting magnet refrigerating mechanism, cooling line inlet and outlet is respectively the inlet and outlet of cooling liquid, and string has at least one of three-way control valve and three-way control valve outlet to communicate with liquid helium vessel in cooling line.Advantage: first is that fundamentally solve remain in liquid helium vessel existing for background technique caused by other residual gases exist when superconducting magnet it is cooling to lower temperature when, in liquid helium vessel and superconducting magnet coil internal residual other gases become the situation of residual solids grain, realize the purpose without other gas residues, it is ensured that the performance of superconducting coil is unaffected；Second is that the cooling cost savings of every superconducting magnet are up to 70% or more than background technique compared with full liquid helium is cooling, unexpected economic benefit and social benefit are achieved.
Description
Technical field
Low temperature needed for superconducting coil can either being made to drop to required superconducting magnet from room temperature the utility model relates to one kind
Environment, and the superconducting magnet second level of the solid-state grain of other gases formation will not be generated in liquid helium vessel and in superconducting coil device
Cooling device belongs to superconducting magnet refrigerating mechanism manufacturing field.
Background technique
Superconducting magnet has been widely used for magnetic resonance equipment at present and other need to stablize, in high magnetic field intensity field.By
Coil made of superconductor, which is worked as, generates strong magnetic field by high current, and passes through the current closed-loop technology hand of Some Characteristics of Superconducting Material
Section, after impressed current gradually removes, superconducting coil maintains its running current and persistently remains unchanged, thus superconducting magnet generates
Magnetic field it is highly stable.
In order to make superconducting magnet non-resistance work, magnetic resonance equipment must provide condition of ultralow temperature to superconducting magnet, surpass
Material is led only under critical temperature condition of the environment temperature lower than material, could show its non-resistance characteristic.General low temperature holds
Device makes superconducting magnet and low-temperature (low temperature) vessel maintain required low temperature environment by Specialty Design.Superconducting magnet first must be from room
Temperature is gradually cooled to low temperature, and common cooling means includes: that (a) using cryogenic liquid to be directly injected into low-temperature (low temperature) vessel directly cold
But it, such as using liquid helium is injected into the liquid helium vessel of superconducting magnet, but such mode needs a large amount of liquid helium, it is at high cost；(b) first
Being directly injected into low-temperature (low temperature) vessel using other both economical cryogenic liquids makes magnet and low-temperature (low temperature) vessel cooling (pre-cooling) to transition
Then temperature is discharged pre-cooling cryogenic liquid using pressure.Finally with cryogenic liquid be injected into the liquid helium vessel of superconducting magnet come
Reach end temperature.
Fig. 3 is the schematic diagram of the superconducting magnet refrigerating mechanism of the prior art.The cooling device includes perfusion tube, perfusion tube
One end is fixed to the input that container top is used for cryogenic liquid, and the other end is fixed to container bottom, to realize offer Low Temperature Liquid
Body is inputted out of container extroversion container.For cooling procedure there are two types of method, direct cooling and second level are cooling.It directly cools down usually used
Liquid helium is directly injected from container top, and bottom releases, and due to too big from room temperature to the temperature difference of superconducting magnet required temperature, is needed big
The liquid helium of amount could make superconducting magnet cool down to scheduled low temperature, and every liter of liquid helium unit price is more than 100 yuan, fills liquid helium appearance
Device needs a large amount of liquid helium, economically extremely unreasonable；Second level cooling means is to use both economical cryogenic liquid, such as liquid nitrogen,
So that superconducting magnet apparatus is cooled to low temperature transition temperature from room temperature, such as using low temperature liquid nitrogen liquid be pre-chilled to subzero 200 DEG C (-
77K), container top release then liquid nitrogen is driven to using pressurized nitrogen or helium out of container, then is used from container top
Liquid helium is filled into superconducting magnet bottom coohng superconducting magnet to -270 DEG C of predetermined working temperature of magnet (4K), although this method can
To save expensive helium resource, but due to using Liquid nitrogen precooler, other remaining gases are unavoidably remained in liquid helium vessel
In the presence of, when superconducting magnet it is cooling to lower temperature when, other gases are formed in liquid helium vessel and inside superconducting magnet coil
Solid bodies, such as form nitrogen solid grain, which has an adverse effect to the performance of superconducting coil.Therefore it provides it is economical and
Effective superconducting coil cooling device and method from room temperature to ultralow temperature is superconducting magnet important component, is necessary.
Utility model content
Purpose of design: avoiding the shortcoming in background technique, designs and a kind of is mutually tied with liquid helium step cooling using liquid nitrogen
It closes, superconducting coil can either be made to drop to required ultra low temperature state from room temperature, and will not be in liquid helium vessel and in superconducting coil
Generate the superconducting magnet second level cooling device and second level cooling means of nitrogen sand grains.
Design scheme: in order to realize above-mentioned purpose of design.The utility model is on the basis of existing superconducting magnet refrigerating mechanism
It is upper: 1, the design of one or more groups of cooling lines being set in the liquid helium vessel in superconducting magnet refrigerating mechanism, be that this is practical new
One of technical characteristic of type.The purpose of this design is: due to the application be arranged in it is one or more groups of cold in liquid helium vessel
But pipeline be located at liquid helium vessel in superconducting magnet surface, and with the matched coil rack surface of superconducting magnet or superconduction
The flange inner surface of magnet cylinder contacts, and one or more groups of cooling lines are equipped with the threeway control communicated with liquid helium vessel
The outlet of valve, three-way control valve is communicated with liquid helium vessel chamber；When pre-cooling, liquid nitrogen is injected into one or more groups of cooling lines
And by the tube wall of one or more groups of cooling lines to superconducting magnet surface and with the matched coil rack surface of superconducting magnet
Or the flange of superconducting magnet cylinder carries out deep cooling, when deep cooling to designed temperature, will be located at one using fluid-pressurized mode
In group or multiple groups cooling line liquid nitrogen emptying, liquid helium is injected by one or more groups of cooling lines again at this time, through one group or
Three-way control valve outlet on multiple groups cooling line enters liquid helium vessel, keeps the superconducting magnet being located in liquid helium vessel cooling to pre-
Determine -270 DEG C of working temperature of magnet (4K).2, the setting of cooling line upper heater is the technical characteristics of the utility model
Two.The purpose of this design is: when due to pre-cooling, using liquid nitrogen in cooling line, after the completion of precooling process, although
Pressurization emptying is carried out to cooling line, but it is micro- to remain very little liquid nitrogen on cooling line wall in order to prevent
Pearl, thus by the way of to cooling line heating, make to remain in the very little liquid nitrogen on cooling line wall and passes through heating
Mode evaporate, and then thoroughly pressurize discharge, it is ensured that any type of liquid nitrogen will not be remained in cooling line.3, three-way control valve
The setting of door upper heater, is the three of the technical characteristics of the utility model.The purpose of this design is: when due to pre-cooling, three
What is passed through in logical control valve is liquid nitrogen, after the completion of precooling process, although having carried out pressurization emptying to three-way control valve door,
Very little liquid nitrogen microballon may be remained on three-way control valve door inner wall in order to prevent, thus using to three-way control valve door
The mode of heating evaporates the very little liquid nitrogen remained on three-way control valve door wall by way of heating, and then thorough
Bottom pressurization discharge, it is ensured that any type of liquid nitrogen will not be remained in three-way control valve door.
Technical solution: a kind of superconducting magnet second level cooling device, including superconducting magnet refrigerating mechanism, the superconducting magnet cold
But cooling line is equipped in the liquid helium vessel in device, cooling line inlet and outlet is respectively the inlet and outlet of coolant liquid, cooling
String has three-way control valve in pipeline and three-way control valve outlet is communicated with liquid helium vessel.
The utility model compared with the background art, first is that fundamentally solving residual in liquid helium vessel existing for background technique
Caused by staying remaining nitrogen to exist when superconducting magnet it is cooling to lower temperature when, in liquid helium vessel and in superconducting magnet coil
Portion's residual liquid nitrogen becomes the situation of residual solids nitrogen sand grains, realizes the remaining purpose of no liquid nitrogen, it is ensured that the performance of superconducting coil
It is unaffected；Second is that every superconducting magnet refrigerating mechanism saves expense and is up to 70% than background technique compared with full liquid helium is cooling
More than, achieve unexpected economic benefit and social benefit member.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of superconducting magnet second level cooling device.
Fig. 2 is the schematic diagram of the superconducting magnet refrigerating mechanism of the prior art.
Fig. 3 is the structural schematic diagram of background technique, wherein 1 main coil, 2 shielded coils, 3 coil racks, 5 magnetic field correction systems
System, 6 anti-interference coils, 7 main switches, 8 protective switchs, 10 quench protection system, 11 liquid helium vessels, 12 cold screens, 13 vacuum layers, and 14
Suspension, 15 current feeds, 17 measurements, the liquefaction of 18 cold heads.
Specific embodiment
Embodiment 1: referring to attached Fig. 1 and 2.A kind of superconducting magnet second level cooling device, including superconducting magnet refrigerating mechanism 1,
The production of superconduction cooling device 1 is the prior art, is not described herein herein.The utility model is in the superconducting magnet refrigerating mechanism 1
On the basis of, cooling line 2,2 import 21 of cooling line and outlet 22 are equipped in the liquid helium vessel 3 in superconducting magnet refrigerating mechanism
The respectively inlet and outlet of coolant liquid, string has three-way control valve 23 and the outlet of three-way control valve 23 and liquid helium vessel 3 in cooling line 2
Chamber communicates.
The cooling line 2 be one group can multiple groups, either one group or multiple groups, cooling line 2 be located at liquid helium hold
The coil surface of superconducting magnet in device 3 touches, and cooling line 2 is equipped with heater.
The cooling line 2 is touched with the coil of the superconducting magnet in liquid helium vessel 3 and coil rack surface, cooling
Pipeline 2 is equipped with heater.
The cooling line 2 be located at liquid helium vessel 3 in superconducting magnet cylinder flange inner surface contact or flange in have
Cooling line 2, cooling line 2 are equipped with heater.
The inner surface of the cooling line 2 and low-temperature (low temperature) vessel touches, and cooling line 2 is equipped with heater.
The outlet of three-way control valve 23 is connected to threeway 24, and the effect of the threeway 24 will flow out three-way control valve 23
Liquid helium is divided into two-way.2 import 21 of the cooling line and outlet 22 are respectively provided with plug, when cooling line 2 import 21 and go out
Mouth 22 is sealed after completing liquid helium injection rates using plug.The heater of three-way control valve Men Shangyou control valve, which can
To be gas heating or electric heating, specific structure composition is the prior art, is not described herein herein.
A kind of embodiment 2: on the basis of embodiment 1, cooling means of superconducting magnet second level cooling device, 1) liquid nitrogen is logical
It crosses and freezes in the cooling line 2 being located in liquid helium vessel 3, be cooled to the superconducting magnet in liquid helium valve container 3 from room temperature subzero
200℃(-77K)；2) liquid nitrogen is driven to out of cooling line 2 using pressurized fluid mode container top release；It 3) will concatenation
Three-way control valve 23 is opened in cooling line 2, and due to the outlet of three-way control valve 23 and liquid helium vessel 3, liquid helium is injected at this time
Cooling line 2 enters in liquid helium vessel 3 since the threeway being serially connected on cooling line controls 23 liquid outlets, and liquid helium is superconducting magnet
It is cooled to -270 DEG C of predetermined working temperature of magnet (4K).Control valve between cooling line can control pipeline gas liquid
The trend of body.
It is to be understood that: although the above-mentioned attached drawing that has been combined describes specific embodiment of the utility model,
It will be appreciated by those skilled in the art that in the case where not departing from the spirit and scope of the utility model, it can be to the utility model
It is variously modified, deforms and equivalent substitution.It is therefore contemplated that these changes, modifications and equivalent substitution all mean fall into
Within spirit and scope defined by attached claim.
Claims (8)
1. a kind of superconducting magnet second level cooling device, including superconducting magnet refrigerating mechanism (1), it is characterized in that: the superconducting magnet
Cooling line (2) are equipped in liquid helium vessel (3) in cooling device (1), cooling line (2) import (21) and outlet (22) are respectively
For the inlet and outlet of coolant liquid, the middle string of cooling line (2) has three-way control valve (23) and three-way control valve (23) outlet holds with liquid helium
Device (3) communicates.
2. superconducting magnet second level cooling device according to claim 1, it is characterized in that: the cooling line (2) be located at
The coil surface of superconducting magnet in liquid helium vessel (3) touches, and cooling line (2) is equipped with heater.
3. superconducting magnet second level cooling device according to claim 1, it is characterized in that: the cooling line (2) be located at
The coil of superconducting magnet in liquid helium vessel (3) and coil rack surface touch, and cooling line (2) is equipped with heater.
4. superconducting magnet second level cooling device according to claim 1, it is characterized in that: the cooling line (2) be located at
The flange inner surface of superconducting magnet cylinder in liquid helium vessel (3) contacts, and cooling line (2) is equipped with heater.
5. superconducting magnet second level cooling device according to claim 1, it is characterized in that: the cooling line (2) and low temperature
The inner surface of container touches, and cooling line (2) is equipped with heater.
6. superconducting magnet second level cooling device according to claim 1, it is characterized in that: the three-way control valve (23) exports
It is connected to threeway (24).
7. superconducting magnet second level cooling device according to claim 1, it is characterized in that: the cooling line (2) import
(21) and outlet (22) is respectively provided with plug.
8. superconducting magnet second level cooling device according to claim 1, it is characterized in that: three-way control valve Men Shangyou control valve
The heater of door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820438628.3U CN208580630U (en) | 2018-03-29 | 2018-03-29 | Superconducting magnet second level cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820438628.3U CN208580630U (en) | 2018-03-29 | 2018-03-29 | Superconducting magnet second level cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208580630U true CN208580630U (en) | 2019-03-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820438628.3U Expired - Fee Related CN208580630U (en) | 2018-03-29 | 2018-03-29 | Superconducting magnet second level cooling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN208580630U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630376A (en) * | 2018-03-29 | 2018-10-09 | 杭州汉胜科磁体设备有限公司 | Superconducting magnet two level cooling device and two level cooling means |
-
2018
- 2018-03-29 CN CN201820438628.3U patent/CN208580630U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630376A (en) * | 2018-03-29 | 2018-10-09 | 杭州汉胜科磁体设备有限公司 | Superconducting magnet two level cooling device and two level cooling means |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190305 Termination date: 20200329 |
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| CF01 | Termination of patent right due to non-payment of annual fee |