CN106531396B - The maintaining method of superconducting magnet component and superconducting magnet component - Google Patents
The maintaining method of superconducting magnet component and superconducting magnet component Download PDFInfo
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- CN106531396B CN106531396B CN201611072039.XA CN201611072039A CN106531396B CN 106531396 B CN106531396 B CN 106531396B CN 201611072039 A CN201611072039 A CN 201611072039A CN 106531396 B CN106531396 B CN 106531396B
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- cold head
- pressurd vessel
- inner pressurd
- head chamber
- superconducting magnet
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of superconducting magnet component and its maintaining method, the superconducting magnet component includes outer container, screen layer, inner pressurd vessel, superconducting coil, superconducting coil is built in inner pressurd vessel, and 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 chamber and the cold head in cold head chamber, the cold head chamber connects with inner pressurd vessel, the cold head includes the first order, the second level, and the second level is located at the lower section of the first order, and the first order is connected by heat conducting element with screen layer.Superconducting magnet component in the embodiment of the present invention includes outer container, screen layer, inner pressurd vessel and is sandwich construction, and the cryogenic media in inner pressurd vessel and screen layer are cooled down by cold head, effectively can avoid or reduce the evaporation of cryogenic media.
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 from gradient coil with specific gradient fields, the hydrogen atom diagnosed in subject is polarized, Ran Houyou
Radio-frequency coil launches radio frequency pulse excitation hydrogen nuclei, causes nuclear resounce, and absorb energy.Stopping radio-frequency pulse
Afterwards, hydrogen nuclei sends electric signal by specific frequency, and the energy of absorption is discharged, and is included by external receiver,
Image is obtained after electronic computer is handled.
In superconducting magnetic resonance imaging system, for superconducting magnet as core component, it utilizes superconduction made of superconductor
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 into superconducting coil, produces high field intensity high stable magnetic field,
And because the coil of superconducting state is zero resistance, electric current will not be lossy.It is general to use the liquid helium to be about as cooling agent, the boiling point of helium
4.2K。
Helium is a kind of more rare and expensive resource, in order to avoid the evaporation of helium as far as possible, it is necessary to cold head to superconducting magnet
Cooling assembly Deng correlation is improved, and realizes liquid helium " zero " evaporation in superconducting magnet system, extends the maintenance of magnet system
Interval；In addition, when changing cold head, it is also desirable to the loss of liquid helium is reduced as far as possible, to save the maintenance cost of imaging system.
【The content of the invention】
The technical problems to be solved by the invention are to provide a kind of superconducting magnet component for reducing use cost.
The present invention is for the technical scheme that uses of solution above-mentioned technical problem：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 connect 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 by heat conducting element with screen layer.
Optionally, the outer container is provided with installation portion, and installation portion upwardly extends 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 by pipeline with the inner pressurd vessel.
Optionally, the installation portion has vertically extending first axle, and the cold head chamber has vertically side
To the second axis of extension, the first axle and second axis are misaligned.
Optionally, the second axis is located at the outside of first axle.
Optionally, the bottom of the cold head chamber is provided with liquid return hole, and the liquid return hole connects with passage, the cold head chamber
Upper wall or the upper wall of installation portion be provided with port, the port and liquid return hole are positioned opposite.
Optionally, in addition to 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 axially extended, the end of mobile jib
Provided with the second through hole radially extended；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 include outer container, screen layer, inner pressurd vessel are sandwich construction, and by cold head to the cryogenic media in inner pressurd vessel and
Screen layer is cooled down, and effectively can avoid or reduce the evaporation of cryogenic media；
The technical problems to be solved by the invention are to provide a kind of maintenance for the superconducting magnet component for reducing use cost
Method.
The present invention is for the technical scheme that uses of solution above-mentioned technical problem：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 and guide rod for being contained in cold head intracavitary, the cold head chamber connect with inner pressurd vessel, and the guide rod has along lengthwise side
First through hole to extension and the second through hole extended laterally, and first through hole connects with the second through hole；The superconducting magnet
The maintaining method of component comprises the following steps：
Step 1, cold head is shut down；
Step 2, barotropic gas is filled with the first through hole into guide rod, and the gas is for cooling down superconducting coil
The gasification form of cryogenic media；
Step 3, cold head chamber and inner pressurd vessel connectivity part are blocked by guide rod, and the barotropic gas is from the second of guide rod
Persistently sprayed in through hole, cold head intracavitary portion is isolated with ambient atmosphere environment；
Step 4, cold head is taken out from cold head chamber, and more renew cold head；
Step 5, moving leader, cold head chamber is set to keep connected state with inner pressurd vessel connectivity part.
Optionally, in addition to by guide rod it is inserted into cold head chamber, and guide rod is fixed on 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
The structure of cold head chamber is optimized example, and the connecting pipe between cold head chamber and inner pressurd vessel is blocked by guide rod, can be more
Effectively prevent the cryogenic media in inner pressurd vessel to evaporate when changing cold head, in addition, by being filled with helium into guide rod, cold head chamber can be made
Completely cut off with ambient atmosphere, avoid ambient atmosphere from entering cold head intracavitary, icing phenomenon occurs.
【Brief description of the drawings】
In order to illustrate more clearly of the technical scheme of this programme embodiment, below by embodiment it is required use it is attached
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, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is the dimensional structure diagram of the superconducting magnet component of the embodiment of the present invention one；
Fig. 2 is the cross-sectional view vertically of the superconducting magnet component of the embodiment of the present invention one；
Fig. 3 is the schematic diagram after the cold head in Fig. 2 superconducting magnet component removes；
Fig. 4 is the cut-away section structural representation of the superconducting magnet component of the embodiment of the present invention two；
Fig. 5 is installed to the schematic diagram of cold head chamber for the guide rod in the superconducting magnet component of the embodiment of the present invention two；
Fig. 6 is to be inflated when the cold head in the superconducting magnet component of the embodiment of the present invention two is replaced by guide rod to cold head chamber
Schematic diagram；
Fig. 7 is the dimensional structure diagram of the guide rod of the embodiment of the present invention two；
Fig. 8 is the decomposing schematic representation of guide rod；
Fig. 9 is by the structural representation after the symmetrical cutting of guide rod with lengthwise face.
【Embodiment】
The invention will be further described with reference to the accompanying drawings and examples.
It will be appreciated that described embodiment is only this programme part of the embodiment, rather than whole embodiments.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, belong to the scope of this programme protection.
The term used in this programme embodiment is only merely for the purpose of description specific embodiment, and is not intended to be limiting
This programme." one kind ", " described " and "the" of singulative used in this programme embodiment and appended claims
It is also intended to including 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 for describing affiliated partner, represent
There may be three kinds of relations, for example, first and/or second, can be represented：Individualism first, while first and second be present, individualism second
These three situations.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
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, come reduce by
The heat that external environment is flowed into 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 because factor, the inner pressurd vessels 3 such as structural support, radiation, residual gas heat exchange still can bear certain heat, so liquid helium meeting
The heat of importing is taken out of in the form of evaporation, to maintain about 4.2K low temperature.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 it 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.Caused helium 6 enters cold head chamber 8 after liquid helium four evaporation in inner pressurd vessel 3, 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 50K temperature, even lower temperature；The second level 92 can reach about 4.2K temperature
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 the upper chamber and lower cavity of connection, 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 by copper strips 90 with cooling radiating layer, cools down screen layer 2；The second level of cold head 9 produces
Extremely low temperature, the liquid helium of gasification can be condensed；Cold head chamber 8 is connected by pipeline 80 with inner pressurd vessel 3, and the liquid helium four in inner pressurd vessel 3 steams
Caused helium 6 enters cold head chamber 8 by pipeline 80 after hair, is condensed into helium drop 7 by the second level of cold head 9, passes through 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 installation portion 1a inner chamber is connected with outer container 1.Installation portion 1a is from outer container
Outer wall upwardly extends.Cold head chamber 8 is contained in installation portion 1a inner chamber, and the axis of cold head chamber 8 and installation portion 1a axis are not
Overlap.Copper strips 90 is in installation portion 1a inner chamber and is connected on radiation shield 2, the penetrating radiation screen layer 2 of pipeline 80；It is optional
, the copper strips tilts down extension.
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 of cold head chamber 8 '.
The structure of cold head chamber 8 ' is optimized the superconducting magnet component of the embodiment of the present invention two, cold in replacing to adapt to
The demand of liquid helium evaporation is reduced during head, is described in detail as follows.
It is a kind of structure of improved cold head chamber 8 ' in Fig. 4, in the bottom of cold head chamber 8 ', (welding) liquid return hole is set
13, material is stainless steel, and optionally, liquid return hole 13 is the upper part of through-hole pipe, and through-hole pipe is protruding upward in the bottom wall of cold head chamber 8 '
Length be 5-20mm, optionally, the length of the through-hole pipe above the bottom wall of cold head chamber 8 ' is 5-15mm, the opening of through-hole pipe
To be horn-like.Optionally, be further provided with connecting pipe 14 below the lower wall of cold head chamber 8 ', connecting pipe 14 it is downwardly projecting in
The length of the lower wall of cold head chamber about 50-100mm, optionally, the length that connecting pipe 14 protrudes from the lower wall of cold head chamber 8 ' is
70mm.The material of connecting pipe 14 is stainless steel, and both 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 of 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 of cold head chamber 8 ', cold head chamber
8 ' are connected by port 12 with ambient atmosphere.The diameter 5-20mm, a diameter of 10mm of optional port 12 of port 12.Usually transport
During row, the helium of evaporation enters cold head chamber 8 ' by connecting pipe 14 in inner pressurd vessel 3, is condensed into liquid helium by cold head, liquid level did not had
After liquid return hole 13, inner pressurd vessel 3 is flowed back to again.Port 12 being sealed by a lid 10, lid 10 is provided with helicitic texture,
Further, the inside of lid 10 is provided with sealing ring 11, to increase the obturation effect between lid 10 and port 12, makes cold head chamber 8 '
Isolate with ambient atmosphere, helium will not be evaporate into ambient atmosphere.
Fig. 7-9 is the structural representation for 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 of 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) among mobile jib 16
162, the bottom of mobile jib 16 is provided with the second through hole 163 of several lateral (radial direction) extensions, 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), the other end of conduit 20 and then can be connected to connecting conduit (flexible pipe) 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, it is enclosed in the seal groove on the top of mobile jib 16, and seal groove is set adjacent to the downside of bead 161.Plug
18 be to shrink less elastomeric material under low temperature, and such as PTFE (Teflon), 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 needs have higher intensity, and relatively low thermal conductivity.
Fig. 5 is the structure that guide rod 15 coordinates with cold head chamber 8 '.Guide rod 15 passes vertically through port 12 and is inserted into cold head chamber 8 ',
Plug 18 is inserted liquid return hole 13, and the inclined-plane of both is tightly bonded.Locking screw set 19 passes through the top of guide rod 15, is screwed to
On port 12, tighten, push down the bead 161 on guide rod 15, so that the plug of the front end of guide rod 15 presses liquid return hole 13.So,
High-pressure helium in inner pressurd vessel 3 can not be entered in cold head chamber 8 ' by liquid return hole 13, so that cold head chamber 8 ' is separated by with inner pressurd vessel 3
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, the other end of conduit 20 connection helium tank, it is malleation to maintain in pipe.
Referring 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 led to the longitudinally on the top of guide rod 15
Hole is connected with conduit 20, and conduit 20 is connected with helium tank, and is passed through malleation (pressure is more than 1 atmospheric pressure, such as 1.1 air
Pressure) helium 201, after helium enters first through hole 162, then sprayed from the second through hole 163 of the end of guide rod 15.By in Fig. 3
Lid 10 is opened, and is now had helium and is sprayed from port 12, by guide rod 15 from port 12 quick insertion cold head chamber 8 ', block back
Liquid mouth 13, cold head chamber and inner pressurd vessel connectivity part (connecting pipe 14) are blocked by guide rod, then tighten locking screw set 19.So
Take out the cold head that need to change afterwards, as shown in fig. 6, now ambient atmosphere with cold head chamber 8 ' is interior is connected, but due to having in seal bar
A large amount of helium 201 are outwards spraying, and make the malleation (being more than an atmospheric pressure) for having a helium to be formed in cold head chamber 8 ', effectively keep away
Exempt from outside air to enter 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 finally extracted, screws on lid 10, cold head, which is changed, to be terminated.
It should be noted that by what is be filled with the first through hole to guide rod it is helium (the i.e. gasification of liquid helium in embodiment
Form)；But if the cryogenic media in inner pressurd vessel is not liquid helium, such as liquid nitrogen, then need in the first through hole into guide rod
Positive nitrogen is filled with, that is, the gas being filled with guide rod first through hole is for the gasification shape for the cryogenic media for cooling down superconducting coil
State.
In whole cold head Renewal process, the helium in inner pressurd vessel 3 will not enter in atmospheric environment, if magnet in the process
Phenomenon is quenched, caused high-pressure helium will not be also sprayed to operating personnel in inner pressurd vessel 3.Certainly, sealing screw thread is being turned on
Lid 10, during guide rod 15 is inserted, having makes in a flash inner pressurd vessel 3 be connected with ambient atmosphere, but short because of the time, and
The exhaust diameter of port 12 is small, does not have a large amount of helium and sprays, the threat to operating personnel is smaller., can by this method
To realize during cold head is changed, inner pressurd vessel 3 and cold head chamber 8 ' are gas-insulated, so being also just not concerned about the height in inner pressurd vessel 3
Pressure helium can eject the personnel of injuring, and make to change cold head in the case of field in magnet and be achieved.
By such a system and the method for changing cold head, the magnet ascending, descending field process changed before and after cold head can be cancelled,
High-pressure helium in liquid helium vessel need not be released, will not also need to add liquid helium 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 it 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 to work as and be defined by what claims were defined.
Claims (5)
- A kind of 1. 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, and 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 connects 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 by heat conducting element and screen layer Connect；The outer container is provided with installation portion, and installation portion upwardly extends from outer container, and the inner chamber of installation portion is connected with outer container, institute Cold head chamber is stated to be contained in the inner chamber of installation portion；The cold head chamber is connected by pipeline with the inner pressurd vessel, the cold head chamber The liquid return hole that bottom is provided with, and the liquid return hole connects with pipeline, the upper wall of the cold head chamber or the upper wall of installation portion are provided with Port, the port and liquid return hole are positioned opposite, and the opening upwards of the liquid return hole；The superconducting magnet component also includes can The guide rod extended to from port in liquid return hole；The guide rod includes mobile jib and plug, and it is logical that mobile jib is provided with first axially extended Hole, the end of mobile jib are provided with the second through hole radially extended；Plug is made up of elastomeric material, is assembled in the end of mobile jib.
- 2. superconducting magnet component according to claim 1, 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 does not weigh with second axis Close.
- 3. superconducting magnet component according to claim 2, it is characterised in that the second axis is located at the outer of first axle Side.
- A kind of 4. 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, is contained in the cold head and guide rod of cold head intracavitary, institute State cold head chamber to connect with inner pressurd vessel, the guide rod has the first through hole extended along longitudinally and second extended laterally logical Hole, and first through hole connects with the second through hole；The maintaining method of the superconducting magnet component comprises the following steps：Step 1, cold head is shut down；Step 2, barotropic gas is filled with the first through hole into guide rod, the gas is the low temperature for cooling down superconducting coil The gasification form of medium；Step 3, cold head chamber and inner pressurd vessel connectivity part are blocked by guide rod, and the barotropic gas is from the second through hole of guide rod In persistently spray, cold head intracavitary portion is isolated with ambient atmosphere environment；Step 4, cold head is taken out from cold head chamber, and more renew cold head；Step 5, moving leader, cold head chamber is set to keep connected state with inner pressurd vessel connectivity part.
- 5. the maintaining method of superconducting magnet component according to claim 4, in addition to guide rod is inserted into cold head chamber, and Guide rod is fixed on cold head chamber.
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| CN117092568A (en) * | 2018-01-19 | 2023-11-21 | 北京绪水互联科技有限公司 | Method for monitoring cold head efficiency |
| US11442124B2 (en) | 2019-09-26 | 2022-09-13 | Shanghai United Imaging Healthcare Co., Ltd. | Superconducting magnet |
| CN112562960B (en) * | 2019-09-26 | 2024-01-19 | 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 |
| CN110867293B (en) * | 2019-11-01 | 2022-06-07 | 东软医疗系统股份有限公司 | A subassembly, service tower main part and service tower for service tower |
| CN111330167B (en) * | 2020-03-06 | 2021-12-24 | 上海联影医疗科技股份有限公司 | Magnetic resonance image guided radiotherapy system |
| CN111913143B (en) * | 2020-06-30 | 2023-08-22 | 上海联影医疗科技股份有限公司 | Scanning device and magnetic resonance imaging system |
| 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 |
| CN113484810B (en) * | 2021-06-29 | 2023-07-25 | 维尔医疗技术(云南)有限公司 | Cooling device for nuclear magnetic resonance |
| CN113948268A (en) * | 2021-10-18 | 2022-01-18 | 上海电气(集团)总公司智惠医疗装备分公司 | Liquid helium-free superconducting magnet system |
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| CN1957429A (en) * | 2004-05-25 | 2007-05-02 | 西门子磁体技术有限公司 | Electrically conductive shield for refrigerator |
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Address after: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 No. 2258 Chengbei Road, Jiading Industrial Zone, Jiading District, Shanghai. Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |