CN106531396A - Superconduction magnet assembly and maintenance method of same - Google Patents
Superconduction magnet assembly and maintenance method of same Download PDFInfo
- Publication number
- CN106531396A CN106531396A CN201611072039.XA CN201611072039A CN106531396A CN 106531396 A CN106531396 A CN 106531396A CN 201611072039 A CN201611072039 A CN 201611072039A CN 106531396 A CN106531396 A CN 106531396A
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- Prior art keywords
- cold head
- head chamber
- pressurd vessel
- inner pressurd
- superconducting magnet
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
- G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
Abstract
The embodiment of the invention discloses a superconduction magnet assembly and a maintenance method thereof. The superconduction magnet assembly comprises an external container, a shielding layer, an internal container and a superconduction coil, wherein the superconduction coil is arranged in the internal container, the internal container is accommodated in the external container, the shielding layer is arranged between the external container and the internal container, the superconduction magnet assembly also comprises a cold head cavity and a cold head, the cold head is arranged in the cold head cavity, the cold head cavity communicates with the internal container, the cold head comprises a first stage and a second stage, the second stage is arranged under the first stage, and the first stage is connected with the shielding layer through a heat conduction component. The superconduction magnet assembly disclosed by the embodiment of the invention comprises the external container, the shielding layer and the internal container and is of a multi-layer structure, the cold head is used for cooling a low-temperature medium in the internal container and the shielding layer, and the evaporation of the low-temperature medium can be effectively prevented or reduced.
Description
【Technical field】
The present invention relates to mr imaging technique, and in particular to a kind of superconducting magnet component for magnetic resonance imaging and its
Maintaining method.
【Background technology】
Magnetic resonance imaging system is widely used to medical diagnostic field, and its general principle is produced uniformly using magnet
High-intensity magnetic field, in the case where being produced with specific gradient fields from gradient coil, by the hydrogen atom polarization in diagnosis object body, Ran Houyou
Radio-frequency coil launches radio frequency pulse excitation hydrogen nuclei, causes nuclear resounce, and energy absorption.Stopping radio-frequency pulse
Afterwards, hydrogen nuclei sends electric signal by CF, and the energy of absorption is discharged, and is included by external receiver,
Image is obtained Jing after electronic computer process.
In superconducting magnetic resonance imaging system, used as core component, which utilizes superconduction made by superconductor to superconducting magnet
Coil produces high field intensity, high stable magnetic field.Superconducting coil is located in the coolant container for filling cooling agent, cooled superconducting line
Circle can reach superconducting temperature, and keep superconducting state.High current is passed through in superconducting coil, high field intensity high stable magnetic field is produced,
And as the coil of superconducting state is zero resistance, electric current will not be lossy.Liquid helium is generally used as cooling agent, the boiling point of helium is about
4.2K。
Helium is a kind of more rare and expensive resource, in order to avoid the evaporation of helium as far as possible, needs the cold head to superconducting magnet
It is improved Deng related cooling assembly, realizes liquid helium " zero " evaporation in superconducting magnet system, extend the maintenance of magnet system
Interval；Additionally, when cold head is changed, it is also desirable to reduce the loss of liquid helium, to save the maintenance cost of imaging system as far as possible.
【The content of the invention】
The technical problem to be solved is to provide a kind of superconducting magnet component for reducing use cost.
The present invention is to solve above-mentioned technical problem and the technical scheme that adopts is：A kind of superconducting magnet component, including outer appearance
Device, screen layer, inner pressurd vessel, superconducting coil, superconducting coil are built in inner pressurd vessel, and inner pressurd vessel is contained in outer container, screen layer
It is arranged between outer container and inner pressurd vessel；The superconducting magnet component also includes cold head chamber and cold in cold head chamber
Head, the cold head chamber are connected with inner pressurd vessel, and the cold head includes the first order, the second level, and the second level is located under the first order
Side, the first order are connected with screen layer by heat conducting element.
Optionally, the outer container is provided with installation portion, and installation portion is upwardly extended from outer container, the inner chamber of installation portion with it is outer
Container is connected, and the cold head chamber is contained in the inner chamber of installation portion.
Optionally, the cold head chamber is connected with the inner pressurd vessel by pipeline.
Optionally, the installation portion has vertically extending first axle, and the cold head chamber has vertically side
To the second axis for extending, the first axle is misaligned with second axis.
Optionally, the second axis are located at the outside of first axle.
Optionally, the bottom in the cold head chamber is provided with liquid return hole, and the liquid return hole is connected with passage, the cold head chamber
Upper wall or the upper wall of installation portion be provided with port, the port is positioned opposite with liquid return hole.
Optionally, also including the guide rod that can be extended to from port in liquid return hole.
Optionally, the guide rod includes mobile jib and plug, and mobile jib is provided with the first through hole for axially extending, the end of mobile jib
It is provided with the second through hole for radially extending；Plug is made up of elastomeric material, is assembled in the end of mobile jib.
The superconducting magnet component contrast prior art of the present invention has following beneficial effect：Superconduction in the embodiment of the present invention
Magnet assembly is sandwich construction including outer container, screen layer, inner pressurd vessel, and by cold head to the cryogenic media in inner pressurd vessel and
Screen layer is cooled down, and can effectively avoid or reduce the evaporation of cryogenic media；
The technical problem to be solved is to provide a kind of maintenance of the superconducting magnet component for reducing use cost
Method.
The present invention is to solve above-mentioned technical problem and the technical scheme that adopts is：A kind of maintenance side of superconducting magnet component
Method, the superconducting magnet component include outer container, screen layer, inner pressurd vessel, superconducting coil, and superconducting coil is built in inner pressurd vessel,
Inner pressurd vessel is contained in outer container, and screen layer is arranged between outer container and inner pressurd vessel；The superconducting magnet component also includes cold
Head cavity, the cold head being contained in cold head chamber and guide rod, the cold head chamber are connected with inner pressurd vessel, and the guide rod is with along lengthwise side
Connect to the first through hole and the second through hole for extending laterally that extend, and first through hole with the second through hole；The superconducting magnet
The maintaining method of component is comprised the following steps：
Step one, cold head is shut down；
Step 2, is filled with barotropic gas in the first through hole in guide rod, and the gas is for cooling down superconducting coil
The gasification form of cryogenic media；
Cold head chamber and inner pressurd vessel connectivity part are blocked by step 3 by guide rod, and the barotropic gas is from the second of guide rod
Persistently spray in through hole, make to be isolated with ambient atmosphere environment inside cold head chamber；
Step 4, cold head is taken out from cold head chamber, and more renews cold head；
Step 5, moving leader make cold head chamber keep connected state with inner pressurd vessel connectivity part.
Optionally, also include guide rod is inserted in cold head chamber, and guide rod is fixed on into cold head chamber.
The maintaining method contrast prior art of the superconducting magnet component of the present invention has following beneficial effect：The present invention is implemented
Example is optimized to the structure in cold head chamber, blocks the connecting pipe between cold head chamber and inner pressurd vessel by guide rod, can be more
The cryogenic media evaporation in effective prevention inner pressurd vessel during cold head is changed, in addition, by helium being filled with into guide rod, can make cold head chamber
Completely cut off with ambient atmosphere, it is to avoid ambient atmosphere is entered in cold head chamber, icing phenomenon occurs.
【Description of the drawings】
In order to be illustrated more clearly that the technical scheme of this programme embodiment, below by to be used attached needed for embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of this programme, for this area
For those of ordinary skill, without having to pay creative labor, can be with other attached according to these accompanying drawings acquisitions
Figure.
Dimensional structure diagrams of the Fig. 1 for the superconducting magnet component of the embodiment of the present invention one；
Cross-sectional views vertically of the Fig. 2 for the superconducting magnet component of the embodiment of the present invention one；
Fig. 3 for Fig. 2 superconducting magnet component in cold head remove after schematic diagram；
Cut-away section structural representations of the Fig. 4 for the superconducting magnet component of the embodiment of the present invention two；
Fig. 5 is installed to the schematic diagram in cold head chamber for the guide rod in the superconducting magnet component of the embodiment of the present invention two；
Inflated to cold head chamber by guide rod when Fig. 6 is replaced for the cold head in the superconducting magnet component of the embodiment of the present invention two
Schematic diagram；
Dimensional structure diagrams of the Fig. 7 for the guide rod of the embodiment of the present invention two；
Decomposing schematic representations of the Fig. 8 for guide rod；
Fig. 9 is by the structural representation after guide rod symmetrical cutting with lengthwise face.
【Specific embodiment】
The invention will be further described with reference to the accompanying drawings and examples.
It will be appreciated that described embodiment is only a part of embodiment of this programme, rather than the embodiment of whole.Base
Embodiment in this programme, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of this programme protection.
Term used in this programme embodiment is the purpose only merely for description specific embodiment, and is not intended to be limiting
This programme." one kind ", " described " and " being somebody's turn to do " of singulative used in this programme embodiment and appended claims
It is also intended to include most forms, unless context clearly shows that other implications.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation of description affiliated partner, represent
There may be three kinds of relations, for example, first and/or second can be represented：Individualism first, while there is first and second, individualism second
These three situations.In addition, character "/" herein, typicallys represent forward-backward correlation to liking a kind of relation of "or".
Fig. 1-3 are referred to, the superconducting magnet component 100 of the embodiment of the present invention one includes outer container 1, screen layer 2, inner pressurd vessel
3rd, superconducting coil 5.There is a number of cryogenic media (such as liquid helium) in inner pressurd vessel 3, superconducting coil 5 is built in inner pressurd vessel 3,
Inner pressurd vessel 3 is contained in outer container 1, make the space between outer container 1 and inner pressurd vessel 3 formed vacuum by way of, reduce by
External environment flows into the heat in inner pressurd vessel 3.A screen layer 2 is there also is provided between outer container 1 and inner pressurd vessel 3, for dropping
Radiations heat energy of the low outer container 1 to inner pressurd vessel 3.Liquid helium four is housed in inner pressurd vessel 3, superconducting coil 5 can be made to keep superconducting state.So
And due to factors such as structural support, radiation, residual gas heat exchange, inner pressurd vessel 3 still can bear certain heat, so liquid helium meeting
Take the heat of importing in the form of evaporating out of, to maintain the low temperature of about 4.2K.To prevent the evaporation of liquid helium, on superconducting magnet component
Refrigerating plant can typically be configured.
Refrigerating plant includes the cold head 9 being contained in cold head chamber 8, and which generally comprises two-stage, and the first order 91 of cold head 9 passes through
Heat conducting element (such as copper strips) 90 is connected with screen layer 2；The second level 92 of cold head 9 produces extremely low temperature, can condense gasification
Liquid helium.The helium 6 produced after liquid helium four evaporation in inner pressurd vessel 3 enters cold head chamber 8, is condensed into helium drop 7 by cold head 9, returns again
It flow to inner pressurd vessel 3.The first order 91 can reach the temperature of 50K, even lower temperature；The second level 92 can reach the temperature of about 4.2K
Degree.In this way, superconducting magnet reaches the state of " zero evaporation ".Optionally, the cold head can be the cold of GM refrigeration machines
Head, or the cold head of sterlin refrigerator.In the present embodiment, the other parts of refrigeration machine (refrigerating plant) are not shown.
Cold head chamber 8 includes upper chamber and the lower cavity for connecting, and the circumferential size of upper chamber is more than lower cavity
Circumferential size.The first order of cold head 9 is installed in upper chamber, and the second level of cold head 9 is installed in lower cavity.
The first order of cold head 9 is connected with cooling radiating layer by copper strips 90, cools down screen layer 2；The second level of cold head 9 produces
Extremely low temperature, can condense the liquid helium of gasification；Cold head chamber 8 is connected with inner pressurd vessel 3 by pipeline 80, and the liquid helium four in inner pressurd vessel 3 steams
The helium 6 produced after sending out enters cold head chamber 8 by pipeline 80, is condensed into helium drop 7 by the second level of cold head 9, by pipeline 80
Again it is back to inner pressurd vessel 3.In this way, superconducting magnet reaches the state of " zero evaporation ", and superconducting magnet can be made to keep good
Good " superconduction " state.
Outer container 1 is provided with installation portion 1a, and the inner chamber of installation portion 1a is connected with outer container 1.Installation portion 1a is from outer container
Outer wall is upwardly extended.Cold head chamber 8 is contained in the inner chamber of installation portion 1a, and the axis of the axis in cold head chamber 8 and installation portion 1a is not
Overlap.Copper strips 90 is in the inner chamber of installation portion 1a and is connected on radiation shield 2,80 penetrating radiation screen layer 2 of pipeline；It is optional
, the downward-sloping extension of the copper strips.
Refer to Fig. 4-9 and combine Fig. 1-3, the part-structure schematic diagram of the superconducting magnet component of the embodiment of the present invention two,
Outer container 1, radiation shield 2 are illustrate only in figure, (corresponding complete structure schematic diagram please join figure to the part-structure of inner pressurd vessel 3
1-2), and cold head chamber 8 ', cold head 9, copper strips 90 etc., the upper bore 120-200mm in cold head chamber 8 '.
The superconducting magnet component of the embodiment of the present invention two is optimized to the structure in cold head chamber 8 ', to adapt to changing cold
The demand of liquid helium evaporation is reduced during head, is described in detail as follows.
It is a kind of structure in improved cold head chamber 8 ' in Fig. 4, in the bottom in cold head chamber 8 ', (welding) liquid return hole is set
13, material is stainless steel, and optionally, upper part of the liquid return hole 13 for through-hole pipe, through-hole pipe are protruding upward in 8 ' diapire of cold head chamber
Length be 5-20mm, optionally, the length of the through-hole pipe above 8 ' diapire of cold head chamber is 5-15mm, the opening of through-hole pipe
For horn-like.Optionally, be further provided with connecting pipe 14 below the lower wall in cold head chamber 8 ', connecting pipe 14 it is downwardly projecting in
The length of the lower wall in cold head chamber about 50-100mm, optionally, connecting pipe 14 protrudes from the length of the lower wall in cold head chamber 8 ' and is
70mm.The material of connecting pipe 14 is stainless steel, and two ends are welded with liquid return hole 13 and inner pressurd vessel 3 respectively, and connecting pipe 14 is set to
In vacuum layer.
The upper wall in cold head chamber 8 ' (or installation portion) has port 12, and port 12 is vertically extending, the periphery of port 12 (or
Inner circumferential) screw thread is provided with, the material of port 12 can be stainless steel, copper etc., and port 12 is welded on the upper wall in cold head chamber 8 ', cold head chamber
8 ' are connected with ambient atmosphere by port 12.The diameter 5-20mm of port 12, a diameter of 10mm of optional port 12.Transport at ordinary times
During row, in inner pressurd vessel 3, the helium of evaporation enters cold head chamber 8 ' by connecting pipe 14, is condensed into liquid helium by cold head, and liquid level did not had
After liquid return hole 13, inner pressurd vessel 3 is flowed back to again.Port 12 can be sealed by a lid 10, lid 10 is provided with helicitic texture,
Further, sealing ring 11 is provided with inside lid 10, to increase the obturation effect between lid 10 and port 12, make cold head chamber 8 '
Isolate with ambient atmosphere, helium will not be evaporate in ambient atmosphere.
Fig. 7-9 is the structural representation of the guide rod 15 being engaged with cold head chamber 8 ', and optionally, guide rod 15 includes three portions
Part：Mobile jib 16, sealing ring 17, plug 18.Mobile jib 16 is made with high-strength material, such as stainless steel, iotaberglass-epoxy composite wood
Material, bead 161 is arranged at its top, for bearing pressure.There is the first through hole extended along longitudinally (axial direction) in the middle of mobile jib 16
162, the bottom of mobile jib 16 is provided with the second through hole 163 that several lateral (radial directions) extend, the second through hole 163 and first through hole 162
Connection；Optionally, the quantity of the second through hole can be one, two, three or four, optionally, the second through hole 163 and first
162 orthogonal setting of through hole, optionally, the second through hole is arranged symmetrically, can be with more uniform to surrounding outlet.Further, first
The top of through hole 162 is helicitic texture (screwed hole), can be further connected to connecting conduit (flexible pipe) 20, the other end of conduit 20
Helium tank (not shown).The bottom of first through hole 162 is female thread structure (screwed hole).Sealing ring 17 is elastomeric material, such as fourth
Fine rubber or fluorubber, which is enclosed within the seal groove on 16 top of mobile jib, and seal groove is arranged adjacent to the downside of bead 161.Plug
18 is that less elastomeric material is shunk under low temperature, such as PTFE (Teflon), and the upper end of plug 18 is external screw thread, can be with first through hole
The female thread structure of 162 bottom coordinates, and the lower end of plug 18 carries inclined-plane (taper surface).Plug by screw threads for fastening mode with
Mobile jib 16 connects.Optionally, the guide rod and plug can also be monolithic structure, be made from an insulative material, wherein, mobile jib
Material is needed with higher intensity, and relatively low thermal conductivity.
Fig. 5 is the structure that guide rod 15 is coordinated with cold head chamber 8 '.Guide rod 15 passes vertically through port 12 and is inserted in cold head chamber 8 ',
Make plug 18 insert liquid return hole 13, and make the inclined-plane of both tightly fit.Locking screw set 19 passes through 15 top of guide rod, is screwed to
On port 12, tighten, push down the bead 161 on guide rod 15, so that the plug of 15 front end of guide rod presses liquid return hole 13.So,
High-pressure helium in inner pressurd vessel 3 can not be entered in cold head chamber 8 ', so that cold head chamber 8 ' is separated by with inner pressurd vessel 3 by liquid return hole 13
Absolutely.Meanwhile, the sealing ring 17 on guide rod 15 is pressed between guide rod 15 and port 12, gas and ambient air in cold head chamber 8 '
It is isolated.The first through hole connecting conduit 20 of guide rod 15,20 other end of conduit connection helium tank maintain to be malleation in pipe.
Refer to Fig. 6, the replacing options of the cold head of the superconducting magnet component of the embodiment of the present invention.
When cold head breaks down or needs to safeguard, first cold head is shut down, then the longitudinally on 15 top of guide rod is led to
Hole is connected with conduit 20, and conduit 20 is connected with helium tank, and (pressure is more than 1 atmospheric pressure, such as 1.1 air to be passed through malleation
Pressure) helium 201, after helium enters first through hole 162, then spray from the second through hole 163 of 15 end of guide rod.By in Fig. 3
Lid 10 is opened, and is now had helium and is sprayed from port 12, by guide rod 15 from quick insertion cold head chamber 8 ' in port 12, is blocked back
Cold head chamber is blocked with inner pressurd vessel connectivity part (connecting pipe 14) by liquid mouth 13 by guide rod, then tightens locking screw set 19.So
The cold head that need to be changed is taken out afterwards, as shown in fig. 6, now ambient atmosphere is connected with cold head chamber 8 ', but due to having in seal bar
A large amount of helium 201 are outwards spraying, and make the malleation (more than an atmospheric pressure) for having a helium to be formed in cold head chamber 8 ', effectively keep away
Exempt from outside air in cold head chamber 8 ' and be condensed in its low temperature wall.Then cold head (such as new cold head) will be replaced again to load
In cold head chamber 8 '.After installing cold head, unscrew locking screw set 19, move up guide rod 15, make cold head chamber and inner pressurd vessel connectivity part
Keep connected state.Guide rod 15 is extracted finally, lid 10 of screwing on, cold head are changed and terminated.
It should be noted that being helium (the i.e. gasification of liquid helium by what is be filled with the first through hole to guide rod in embodiment
Form)；But, if the cryogenic media in inner pressurd vessel is not liquid helium, such as liquid nitrogen is then needed in the first through hole in guide rod
Positive nitrogen is filled with, that is, the gas being filled with guide rod first through hole is the gasification shape for cooling down the cryogenic media of superconducting coil
State.
In whole cold head Renewal process, the helium in inner pressurd vessel 3 will not be entered in atmospheric environment, if the magnet during
Phenomenon is quenched, the high-pressure helium produced in inner pressurd vessel 3 also will not be sprayed to operating personnel.Certainly, turning on sealing screw thread
Lid 10, to insertion guide rod 15, is had, but be because that the time is short, and
The exhaust diameter of port 12 is little, does not have a large amount of helium and sprays, and the threat to operating personnel is less.By this method, can
To realize that inner pressurd vessel 3 is gas-insulated with cold head chamber 8 ', so the height being also just not concerned about in inner pressurd vessel 3 during cold head is changed
Pressure helium can eject the personnel of injuring, and make cold head is changed in the case of field in magnet and be achieved.
By this kind of system and the method for changing cold head, the magnet ascending, descending field process before and after replacing cold head can be cancelled,
High-pressure helium in liquid helium vessel need not be released, also will not need that liquid helium is added because of the decline due to liquid level.Can be with
Save liquid helium, the helium of plenty of time and preciousness.
Although the present invention is disclosed as above with preferred embodiment, so which is not limited to the present invention, any this area skill
Art personnel, without departing from the spirit and scope of the present invention, when a little modification and perfect, therefore the protection model of the present invention can be made
Enclose when by being defined that claims are defined.
Claims (10)
1. a kind of superconducting magnet component, it is characterised in that：Including outer container, screen layer, inner pressurd vessel, superconducting coil, superconducting coil
It is built in inner pressurd vessel, inner pressurd vessel is contained in outer container, screen layer is arranged between outer container and inner pressurd vessel；The superconducting magnetic
Body component also includes cold head chamber and the cold head in cold head chamber, and the cold head chamber is connected with inner pressurd vessel, the cold head bag
The first order, the second level are included, the second level is located at the lower section of the first order, and the first order is connected with screen layer by heat conducting element
Connect.
2. superconducting magnet component according to claim 1, it is characterised in that the outer container is provided with installation portion, installs
Portion is upwardly extended from outer container, and the inner chamber of installation portion is connected with outer container, and the cold head chamber is contained in the inner chamber of installation portion.
3. superconducting magnet component according to claim 2, it is characterised in that the cold head chamber passes through pipeline and the content
Device is connected.
4. superconducting magnet component according to claim 2, it is characterised in that the installation portion has vertically extending
First axle, the cold head chamber has vertically extending second axis, and the first axle is not weighed with second axis
Close.
5. superconducting magnet component according to claim 4, it is characterised in that the second axis are located at the outer of first axle
Side.
6. superconducting magnet component according to claim 3, it is characterised in that the bottom in the cold head chamber is provided with liquid return hole,
And the liquid return hole is connected with passage, the upper wall in cold head chamber or the upper wall of installation portion are provided with port, the port with return
Liquid mouth is positioned opposite.
7. superconducting magnet component according to claim 6, it is characterised in that also including can extend in liquid return hole from port
Guide rod.
8. superconducting magnet component according to claim 7, it is characterised in that the guide rod includes mobile jib and plug, mobile jib
The first through hole for axially extending is provided with, the end of mobile jib is provided with the second through hole for radially extending；Plug is elastomeric material system
Into being assembled in the end of mobile jib.
9. a kind of maintaining method of superconducting magnet component, it is characterised in that：The superconducting magnet component includes outer container, shielding
Layer, inner pressurd vessel, superconducting coil, superconducting coil are built in inner pressurd vessel, and inner pressurd vessel is contained in outer container, and screen layer is arranged in outer
Between container and inner pressurd vessel；The superconducting magnet component also includes cold head chamber, the cold head being contained in cold head chamber and guide rod, institute
State cold head chamber to connect with inner pressurd vessel, the guide rod with the first through hole extended along longitudinally and extend laterally second lead to
Hole, and first through hole connected with the second through hole；The maintaining method of the superconducting magnet component is comprised the following steps：
Step one, cold head is shut down；
Step 2, is filled with barotropic gas in the first through hole in guide rod, and the gas is the low temperature for cooling down superconducting coil
The gasification form of medium；
Cold head chamber is blocked with inner pressurd vessel connectivity part by guide rod, and the barotropic gas is from the second through hole of guide rod by step 3
In persistently spray, make to be isolated with ambient atmosphere environment inside cold head chamber；
Step 4, cold head is taken out from cold head chamber, and more renews cold head；
Step 5, moving leader make cold head chamber keep connected state with inner pressurd vessel connectivity part.
10. the maintaining method of superconducting magnet component according to claim 9, also includes guide rod is inserted in cold head chamber,
And guide rod is fixed on into cold head chamber.
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| CN110058184A (en) * | 2018-01-19 | 2019-07-26 | 北京绪水互联科技有限公司 | Cold head efficiency calculation index and method, the system that cold head efficiency calculation and monitoring are realized using the index |
| CN110867293A (en) * | 2019-11-01 | 2020-03-06 | 东软医疗系统股份有限公司 | A subassembly, service tower main part and service tower for service tower |
| CN111330167A (en) * | 2020-03-06 | 2020-06-26 | 上海联影医疗科技有限公司 | Magnetic resonance image guided radiotherapy system |
| CN111913143A (en) * | 2020-06-30 | 2020-11-10 | 上海联影医疗科技有限公司 | Scanning device and magnetic resonance imaging system |
| CN112562960A (en) * | 2019-09-26 | 2021-03-26 | 上海联影医疗科技股份有限公司 | Superconducting magnet system, nuclear magnetic resonance apparatus, and nuclear magnetic resonance apparatus cooling method |
| CN113284691A (en) * | 2021-05-08 | 2021-08-20 | 中国科学院合肥物质科学研究院 | Zero-evaporation superconducting magnet system capable of saving liquid helium |
| CN113484810A (en) * | 2021-06-29 | 2021-10-08 | 范金来 | Cooling device for nuclear magnetic resonance |
| US11442124B2 (en) | 2019-09-26 | 2022-09-13 | Shanghai United Imaging Healthcare Co., Ltd. | Superconducting magnet |
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