CN201754182U - Compact-structure cold finger container for superconducting magnets - Google Patents
Compact-structure cold finger container for superconducting magnets Download PDFInfo
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- CN201754182U CN201754182U CN2010201989140U CN201020198914U CN201754182U CN 201754182 U CN201754182 U CN 201754182U CN 2010201989140 U CN2010201989140 U CN 2010201989140U CN 201020198914 U CN201020198914 U CN 201020198914U CN 201754182 U CN201754182 U CN 201754182U
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- cold
- vibration damping
- container
- junction container
- cold finger
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
A compact-structure cold finger container for superconducting magnets is characterized by mainly consisting of a primary stainless steel thin-walled tube (7), a primary heat transfer block (8), a secondary stainless steel thin-walled tube (9), a secondary heat transfer block (10), a bottom connection corrugated tube (11), a cold finger container upper flange (12), a cold finger container lower flange (13) and a vibration-reduction corrugated tube (14). A vibration reduction mechanism in the compact-structure cold finger container for superconducting magnets is independent from the cold finger container. By the aid of a split design, a 300K sleeve of the cold finger container can be closer to a cooling screen, so that the cold finger container is more compact in structure. Simultaneously, the compact-structure cold finger container optimizes assembling and welding sequence and brings convenience for integral inflating pressure and vacuum leakage detection tests. The separated vibration reduction mechanism of the cold finger container can not be seated on the magnet container and is a supporting structure designed independently, thereby further reducing influence to magnet imaging due to cold finger vibration.
Description
Technical field
The utility model relates to the superconducting magnet cold-junction container, specifically is a kind of superconducting magnet cold-junction container of compact conformation, is specially adapted to the superconducting magnetic resonance equipment of liquid helium zero volatilization and little volatilization.
Background technology
At present, the whole imaging system of nuclear magnetic resonance is according to the characteristics of cell atom nucleus band micromagnetism, can apply special variable magnetic field to a certain position of human body, observe the changed condition of certain atom in magnetic field then, be aided with computer image analysis technique, just can obtain the information of tissue, help to determine diseased region.Superconducting magnet is attended by the most momentous results in the application of medical science, and superconducting magnet is compared with permanent magnet, electromagnet that we know, has the advantages that volume is little, in light weight, power consumption is few, magnetic field intensity is high.In the medical magnetic resonance field,, must use certain high field intensity superconducting magnet in order to obtain to stablize high-quality image.
The superconduction nuclear magnetic resonance generally uses liquid helium as refrigerant, for superconducting coil is set up and maintenance superconduction environment, therefore magnet adopts the vacuum multilayer insulation structure, but because multiple factors such as support structure, can not stop heat conduction fully, so liquid helium can be taken the heat of importing out of with the form of evaporation, to keep the temperature of 4.2K.For reducing the evaporation of liquid helium, be typically equipped with refrigeration system on the superconduction nuclear magnetic resonance so that cold to be provided, reduce the liquid helium evaporation.Refrigeration system comprises cold head, compressor, three parts of water-cooled unit.Cold head is a refrigeration part, for superconducting magnet provides 4K and 50K two-stage low temperature.Zero volatilizees the superconducting magnet dewar container mainly by 4.2K, 50K and 300K three double-walled cartridge types container and neck tube, and cold-junction container and other supporting parts are formed.Wherein the 40K container is cold screen, 4.2K, and the 300K container is made with 304 magnetism-free stainless steels.40k cold screen is in order to reduce the radiant heat transfer between liquid helium temperature and the room temperature.
The cold that cold-junction container provides cold screen cold of magnet and volatilization helium to liquefy again, small-sized Cryo Refrigerator cold head is installed in low-temperature (low temperature) vessel, the helium of volatilization liquefied again replenish needed liquid helium, after this operation with closed ring refrigeration system has been arranged, do not consume liquid helium in principle, operation brings great convenience and has reduced operating cost to superconducting magnet for this.
Because refrigeration machine cold head, particularly GM cold head bring very big vibrational energy can for the superconducting magnet of magnetic resonance system, consequent scan image is second-rate.
Summary of the invention
The purpose of this utility model is to provide a kind of superconducting magnet cold-junction container of compact conformation, is difficult to detect, vibrate bigger drawback to overcome bulky, the whole assembling of existing cold-junction container.
The technical solution of the utility model is:
A kind of superconducting magnet cold-junction container of compact conformation, it is mainly by the one-level stainless-steel thin-wall pipe, the one-level heat transfer block, the secondary stainless-steel thin-wall pipe, the secondary heat transfer block, the bottom connects corrugated tube, the cold-junction container upper flange, cold-junction container lower flange and vibration damping corrugated tube are formed, described one-level stainless-steel thin-wall pipe top is provided with the vibration damping corrugated tube, the vibration damping corrugated tube is respectively equipped with cold-junction container upper flange and cold-junction container lower flange in two ends up and down, one-level stainless-steel thin-wall pipe lower end connects the secondary stainless-steel thin-wall pipe by the one-level heat transfer block, secondary stainless-steel thin-wall pipe lower end is provided with the secondary heat transfer block, secondary heat transfer block bottom is provided with the bottom and connects corrugated tube, the cold-junction container lower flange connects vacuum sleeve, is provided with cold screen between secondary stainless-steel thin-wall pipe and the vacuum sleeve.
Cold head is connected with the cold-junction container upper flange, and the one-level cold head of cold head is set in the one-level stainless-steel thin-wall pipe, and the secondary cold head of cold head and mistake cold heat exchanger are set in the secondary stainless-steel thin-wall pipe.
Be provided with the vibration damping regulating device between described cold-junction container upper flange and the cold-junction container lower flange.
Described vibration damping regulating device comprises vibration damping regulating spring, vibration damping regulating spring upper flange, vibration damping regulating spring lower flange and regulates bolt, described vibration damping regulating spring upper flange is connected with the cold-junction container upper flange, vibration damping regulating spring lower flange is connected with the cold-junction container lower flange, be provided with the vibration damping regulating spring between vibration damping regulating spring upper flange and vibration damping regulating spring lower flange, vibration damping regulating spring upper flange is provided with the adjusting bolt that is connected with the vibration damping regulating spring.
Described secondary stainless-steel thin-wall pipe outside is provided with magnetic shielding.
Described vacuum sleeve bottom is provided with magnet carrier.
Described vibration damping regulating spring lower flange connects the cold-junction container bracing frame.
Vibration damping bellows interior between the outside of described cold-junction container, cold-junction container upper flange and the cold-junction container lower flange, vacuum sleeve volume inside are same vacuum.
The beneficial effects of the utility model are:
The superconducting magnet of the utility model compact conformation is independent with damper mechanism in the cold-junction container and cold-junction container with cold-junction container.Adopt split-type design, make the 300K sleeve of cold-junction container can be, thereby make in the cold-junction container mechanism compact more more near cooling screen.Optimize assembling and welding sequence simultaneously, be convenient to the air pressure and the vacuum leak hunting test of cold-junction container integral body.The damping of cold-junction container separately not seat but designs independently supporting construction on the magnet container.Can further reduce the influence of the vibration of cold head like this to the magnet imaging.
Description of drawings
Fig. 1 is the structural representation of the superconducting magnet of existing magnetic resonance imaging system.
Fig. 2 is a structural representation of the present utility model behind the installation cold head.
Fig. 3 is an one-piece construction synoptic diagram of the present utility model.
Fig. 4 is the local enlarged diagram of I among Fig. 3.
Fig. 5 is that the utility model is installed in the structural representation on the cold-junction container bracing frame.
Among the figure: 1 is cold-junction container, 2 is the neck tube container, 3 is vacuum sleeve, 30 is vacuum tank, 4 is cold screen, 5 is the magnet container, 6 is cold head, 60 is the one-level cold head, 61 is the secondary cold head, 62 was cold heat exchanger, 7 is the one-level stainless-steel thin-wall pipe, 8 is the one-level heat transfer block, 9 is the secondary stainless-steel thin-wall pipe, 10 is the secondary heat transfer block, 11 are bottom connection corrugated tube, 12 is the cold-junction container upper flange, 13 is the cold-junction container lower flange, 14 is the vibration damping corrugated tube, 15 is the vibration damping regulating spring, 16 is vibration damping regulating spring upper flange, 17 is vibration damping regulating spring lower flange, 18 for regulating bolt, 19 are magnetic shielding, 20 is the cold-junction container bracing frame, 21 is magnet carrier.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
A kind of superconducting magnet cold-junction container of compact conformation, it is mainly by one-level stainless-steel thin-wall pipe 7, one-level heat transfer block 8, secondary stainless-steel thin-wall pipe 9, secondary heat transfer block 10, the bottom connects corrugated tube 11, cold-junction container upper flange 12, cold-junction container lower flange 13 and vibration damping corrugated tube 14 are formed, described one-level stainless-steel thin-wall pipe 7 tops are provided with vibration damping corrugated tube 14, the vibration damping corrugated tube is respectively equipped with cold-junction container upper flange 12 and cold-junction container lower flange 13 in two ends about in the of 14, one-level stainless-steel thin-wall pipe 7 lower ends connect secondary stainless-steel thin-wall pipe 9 by one-level heat transfer block 8, secondary stainless-steel thin-wall pipe 9 lower ends are provided with secondary heat transfer block 10, secondary heat transfer block 10 bottoms are provided with the bottom and connect corrugated tube 11, cold-junction container lower flange 13 connects vacuum sleeve 3, is provided with cold screen 4 between secondary stainless-steel thin-wall pipe 9 and the vacuum sleeve 3.
Be provided with the vibration damping regulating device between cold-junction container upper flange 12 and the cold-junction container lower flange 13.
The vibration damping regulating device comprises vibration damping regulating spring 15, vibration damping regulating spring upper flange 16, vibration damping regulating spring lower flange 17 and regulates bolt 18, described vibration damping regulating spring upper flange 16 is connected with cold-junction container upper flange 12, vibration damping regulating spring lower flange 17 is connected with cold-junction container lower flange 13, vibration damping regulating spring upper flange 16 and 17 of vibration damping regulating spring lower flanges are provided with vibration damping regulating spring 15, and vibration damping regulating spring upper flange 16 is provided with the adjusting bolt 18 that is connected with vibration damping regulating spring 15.
Secondary stainless-steel thin-wall pipe 9 outsides are provided with magnetic shielding 19.
Vibration damping regulating spring lower flange 17 connects cold-junction container bracing frame 20.
Fig. 1 is the structural representation of the superconducting magnet of existing magnetic resonance imaging system., this magnet is by 4K magnet container 5, the cold screen 4 of 50K, compositions such as 300K vacuum tank 30 and neck tube container 2 and cold-junction container 1.As shown in Figure 2, cold-junction container 1 comprises that one-level stainless-steel thin-wall pipe 7, one-level heat transfer block 8, secondary stainless-steel thin-wall pipe 9, secondary heat transfer block 10, bottom connect the vibration damping regulating spring 15 between vibration damping corrugated tube 14, vibration damping regulating spring upper flange 16 and the vibration damping regulating spring lower flange 17 between corrugated tube 11, cold-junction container upper flange 12, cold-junction container lower flange 13, cold-junction container upper flange 12 and the cold-junction container lower flange 13.The bottom connects corrugated tube 11 and is communicated with cold-junction container 1 and 4K magnet container 5.Vibration damping corrugated tube 14 inside, 300K vacuum sleeve 3 volume inside between the outside of described cold-junction container, cold-junction container upper flange 12 and the cold-junction container lower flange 13 are same vacuum.
As shown in Figure 3, Figure 4, cold-junction container upper flange 12 and cold-junction container lower flange 13 are made the branch body structure.As cold-junction container upper flange 12 is comprised the container upper flange, cold-junction container upper flange 12 connects shock-absorbing spring upper flange 16, and cold-junction container lower flange 13 is comprised the container lower flange, and cold-junction container lower flange 13 connects shock-absorbing spring lower flange 17.Link to each other by screw between cold-junction container upper flange 12 and the shock-absorbing spring upper flange 16, or by welding.The purpose of doing like this is in the process of product assembling, be welded to 4K magnet container 5 on by corrugated tube cold-junction container 1 after, install cold head magnetic shielding 19, and cold screen 4 linked on the one-level heat transfer block 8 of cold-junction container by flexible thermal.Outside wrapping heat insulation layer at aluminium screen sleeve.Load onto 300K vacuum sleeve 3 then from top to down.The upper end of vacuum sleeve 3 and 13 welding of cold-junction container lower flange, and the lower end of vacuum sleeve 3 and the welding of 300K vacuum tank 3 urceolus.
Load onto shock-absorbing spring upper flange 16 at last, shock-absorbing spring lower flange 1, and circumferentially uniform a plurality of vibration damping regulating springs 15 and adjusting bolt 18.This design separates cold-junction container 1 and its vibration damping regulating device, has reduced the diameter of 300K vacuum sleeve 3, makes whole cold-junction container 1 compact more.Opening diameter on the 300K vacuum urceolus that has reduced simultaneously at magnet has been avoided the reduction of 300K vacuum urceolus intensity.
As shown in Figure 5, if cold-junction container lower flange 13 and shock-absorbing spring lower flange 17 not mechanical fixation be in the same place, but the lower flange 17 of shock-absorbing spring is linked to each other with a cold-junction container bracing frame 20, and cold-junction container bracing frame 20 can be selected seat on the ground.The vibration of cold head 6 is directly delivered on the cold-junction container bracing frame 20 rather than on the magnet container, has further reduced the influence of cold-junction container 1 vibration to image quality like this.This is to further develop of the present utility model, and it is less to the volume ratio of magnet own to replant supporting construction, is fit to and place the bigger systematic comparison in magnet room.Can selectively use according to the place situation.
The utility model is done elaboration at 4K wet type cold-junction container, but 4K dry type cold-junction container and 20K dry cold screen cold-junction container are also included within the utility model.The dry type container is defined as cold-junction container for independently vacuum and liquid helium vessel do not connect.And the wet type container is defined as cold-junction container and liquid helium vessel conducting, the helium of cold head energy direct liquefaction volatilization.
Claims (7)
1. the superconducting magnet cold-junction container of a compact conformation, it is characterized in that it is mainly by one-level stainless-steel thin-wall pipe (7), one-level heat transfer block (8), secondary stainless-steel thin-wall pipe (9), secondary heat transfer block (10), the bottom connects corrugated tube (11), cold-junction container upper flange (12), cold-junction container lower flange (13) and vibration damping corrugated tube (14) are formed, described one-level stainless-steel thin-wall pipe (7) top is provided with vibration damping corrugated tube (14), vibration damping corrugated tube (14) two ends up and down is respectively equipped with cold-junction container upper flange (12) and cold-junction container lower flange (13), one-level stainless-steel thin-wall pipe (7) lower end connects secondary stainless-steel thin-wall pipe (9) by one-level heat transfer block (8), secondary stainless-steel thin-wall pipe (9) lower end is provided with secondary heat transfer block (10), secondary heat transfer block (10) bottom is provided with the bottom and connects corrugated tube (11), cold-junction container lower flange (13) connects vacuum sleeve (3), is provided with cold screen (4) between secondary stainless-steel thin-wall pipe (9) and the vacuum sleeve (3).
2. the superconducting magnet cold-junction container of a kind of compact conformation according to claim 1 is characterized in that being provided with the vibration damping regulating device between described cold-junction container upper flange (12) and the cold-junction container lower flange (13).
3. the superconducting magnet cold-junction container of a kind of compact conformation according to claim 2, it is characterized in that described vibration damping regulating device comprises vibration damping regulating spring (15), vibration damping regulating spring upper flange (16), vibration damping regulating spring lower flange (17) and adjusting bolt (18), described vibration damping regulating spring upper flange (16) is connected with cold-junction container upper flange (12), vibration damping regulating spring lower flange (17) is connected with cold-junction container lower flange (13), be provided with vibration damping regulating spring (15) between vibration damping regulating spring upper flange (16) and vibration damping regulating spring lower flange (17), vibration damping regulating spring upper flange (16) is provided with the adjusting bolt (18) that is connected with vibration damping regulating spring (15).
4. the superconducting magnet cold-junction container of a kind of compact conformation according to claim 1 is characterized in that described secondary stainless-steel thin-wall pipe (9) outside is provided with magnetic shielding (19).
5. the superconducting magnet cold-junction container of a kind of compact conformation according to claim 1 is characterized in that described vacuum sleeve (3) bottom is provided with magnet carrier (21).
6. the superconducting magnet cold-junction container of a kind of compact conformation according to claim 3 is characterized in that described vibration damping regulating spring lower flange (17) connects cold-junction container bracing frame (20).
7. the superconducting magnet cold-junction container of a kind of compact conformation according to claim 1 is characterized in that the vibration damping corrugated tube (14) between outside, cold-junction container upper flange (12) and the cold-junction container lower flange (13) of described cold-junction container is inner, vacuum sleeve (3) volume inside is same vacuum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201989140U CN201754182U (en) | 2010-05-21 | 2010-05-21 | Compact-structure cold finger container for superconducting magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201989140U CN201754182U (en) | 2010-05-21 | 2010-05-21 | Compact-structure cold finger container for superconducting magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201754182U true CN201754182U (en) | 2011-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201989140U Expired - Lifetime CN201754182U (en) | 2010-05-21 | 2010-05-21 | Compact-structure cold finger container for superconducting magnets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201754182U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923148A (en) * | 2010-05-21 | 2010-12-22 | 南京丰盛超导技术有限公司 | Compact cold-junction container for superconductive magnet |
| CN106960713A (en) * | 2017-03-23 | 2017-07-18 | 杭州图锐科技有限公司 | A kind of refrigeration machine for superconducting magnet it is jacket structured and its install, method for dismounting |
-
2010
- 2010-05-21 CN CN2010201989140U patent/CN201754182U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923148A (en) * | 2010-05-21 | 2010-12-22 | 南京丰盛超导技术有限公司 | Compact cold-junction container for superconductive magnet |
| CN101923148B (en) * | 2010-05-21 | 2013-06-05 | 南京丰盛超导技术有限公司 | Compact cold-junction container for superconductive magnet |
| CN106960713A (en) * | 2017-03-23 | 2017-07-18 | 杭州图锐科技有限公司 | A kind of refrigeration machine for superconducting magnet it is jacket structured and its install, method for dismounting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110302 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |