CN206849605U - A kind of extension type magnetizes current lead device - Google Patents
A kind of extension type magnetizes current lead device Download PDFInfo
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- CN206849605U CN206849605U CN201720290543.0U CN201720290543U CN206849605U CN 206849605 U CN206849605 U CN 206849605U CN 201720290543 U CN201720290543 U CN 201720290543U CN 206849605 U CN206849605 U CN 206849605U
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Abstract
A kind of extension type magnetizes current lead device, including is arranged on the extension type of liquid nitrogen indoor and often guides line segment（1）, with cold head（71）Hot linked high-temperature superconductor transition lead wire section（2）, and low-temperature superconducting lead-out wires of coil section（3）Three parts；Extension type often guides line segment（1）Connect high-temperature part, high-temperature superconductor transition lead wire section（2）Connect low temperature part, low-temperature superconducting lead-out wires of coil section（3）Connect superconducting coil（8）；Extension type often guides line segment（1）Lower end and high-temperature superconductor transition lead wire section（2）Upper end is connected by inserting mode, and junction is provided with scalable electrical contact（20）, high-temperature superconductor transition lead wire section（2）Lower end and low-temperature superconducting lead-out wires of coil section（3）It is welded to connect；Conducting heavy current rod（10）With high-temperature superconducting lead（24）Whole piece is together form to magnetize the current path of lead；Low with conductive heat leakage, airtight performance is high and excitation operates the characteristics of convenient.
Description
Technical field
The one kind that the utility model is related to superconducting magnet system magnetizes current lead device, more particularly to a kind of extension type
Magnetize current lead device.
Background technology
It is applied to clinical most of magnetic resonance imaging system at present（MRI）Superconducting magnet in be filled with costliness liquid helium
（LHe）To maintain the critical-temperature needed for low-temperature superconducting line.But constantly soaring liquid helium price and very likely short liquid
Helium resource, it is added significantly to the demand without liquid helium magnet.Without liquid helium magnet compared with liquid helium magnet, refrigerant is made without liquid helium
And operating ambient temperature is only controlled by refrigeration machine, but current refrigeration machine cooling power limited, such as vascular refrigerator, one-level
It is 35W during cold head refrigeration work consumption 50K, there was only 1.5W during two level cold head refrigeration work consumption 10K.It is so integrally-built to magnet close
Sealing property and internal heat transfer switching performance, and the requirement of outside leakage Thermal protection are higher.
Superconducting magnet makes magnet be run under lasting electric current after the completion of magnetizing, using superconducting switch is closed.Due to
All outside leakages are hankered, and the lead of the outside power supply that magnetizes of connection account for very big ratio, or even up to 90%.In order to effective
Ground reduces outside leakage heat, and prior art generally use pulls out formula current feed and copper and high-temperature superconductor by copper or copper alloy
The current feed of lead combination.In the current feed that copper combines with high-temperature superconducting lead, the leakage of copper lead heat is most of can be by
One-level cold head is taken away, and high-temperature superconductive lead wire is then in superconducting state, will not produce Joule heat, and leakage heat is very small.It is but existing
Some excitation technologies can destroy the vacuum environment of Dewar.For need ensure vacuum environment without liquid helium superconducting magnet for,
It is also required to ensure that vacuum environment will not be destroyed in magnetization process.
The method for the current feed that copper combines with high-temperature superconducting lead has largely reduced Lou heat, but for only
By refrigeration machine control operating ambient temperature without liquid helium superconducting magnet for, when the electric current that magnetizes of 600 Amps passes through electric current
During lead copper rod, leakage heat of the copper current lead to one-level cold head is still very big, causes cold screen temperature not fall too low, cold screen
The higher radiant heat to superconducting magnet of temperature it is also bigger, superconducting magnet cisco unity malfunction may be caused when serious.
Utility model content
The purpose of this utility model is to overcome to leak the defects of heat is big at the existing current feed that magnetizes, and also ensure that no liquid helium
The closed demand of magnet overall vacuum, propose that a kind of extension type magnetizes current lead device.
To achieve these goals, the utility model uses following technical scheme：
A kind of extension type magnetizes current lead device, including is arranged on the extension type of liquid nitrogen indoor and often guides line segment,
With the hot linked high-temperature superconductor transition lead wire section of cold head, and low-temperature superconducting lead-out wires of coil section three parts；Described is scalable
Formula often guides line segment connection high-temperature part；Described high-temperature superconductor transition lead wire section connection low temperature part；Described low-temperature superconducting
Lead-out wires of coil section connection superconducting coil part；Described extension type often guides line segment lower end and described high-temperature superconductor transition
Lead segments upper end is connected by inserting mode, and junction is provided with scalable electrical contact；Described high-temperature superconductor transition lead wire section
Lower end is welded to connect with low-temperature superconducting lead-out wires of coil section；Whole piece is formd to magnetize the current path of lead.
Preferably, described extension type, which often guides line segment, mainly includes two conducting heavy current rods, insulated enclosure axle
Set, liquid nitrogen transfusion pipe, nitrogen exhaust pipe, liquid nitrogen room cover plate, liquid nitrogen refrigerating agent, trip bolt, elastic bellows, fabroil bottom
Plate, double-deck epoxy resin layer, becket, drawing mechanism, sealing flange, fastening soket head cap screw.
Preferably, two described conducting heavy current rods are high conductive material, such as highly conductive red copper bar；Described two
The upper end inwall processing of conducting heavy current rod has the screwed hole with fastening soket head cap screw size fit；Two described high currents
Contact rod forms electric insulation and vacuum sealing by insulated enclosure axle sleeve and sealing flange；Described insulated enclosure axle sleeve is enclosed on greatly
Between current conduction rod and sealing flange；The lower end of two described conducting heavy current rods is provided with annular stop groove.
Preferably, described cold head top is provided with a vacuum dewar, described vacuum dewar upper cover plate is provided with installation
Extension type often guides the circular hole of line segment, and edge is welded with sealing flange on above-mentioned circular hole；Described liquid nitrogen room cover plate lower end leads to
Cross trip bolt to fix with sealing flange, the elastic bellows of a suitable length are machined with inside it, be provided among it for two
Two circular holes of root conducting heavy current rod, feed flow nitrogen woven hose and two circular holes of nitrogen exhaust pipe are also had among it；
Described elastic bellows are circumferentially positioned at outside two conducting heavy current rods, and its upper end is welded in liquid nitrogen room cover plate, its lower end
Fixed by two circular holes that fabroil bottom plate is processed and conducting heavy current rod parallel coaxial；Described elastic bellows lower end
Inner surface welding has becket, and it is fixed fabroil bottom plate by becket；Described fabroil bottom plate is arranged on double
Between layer epoxy resin layer；Described double-deck epoxy resin layer by glued annular stop groove by two conducting heavy current rods with
Fabroil bottom plate is fixed, and two conducting heavy current rods and elastic bellows are mechanically connected；Described double-deck epoxy resin layer
It is made up of aluminium nitride epoxy resin composite material, aluminium nitride epoxy resin composite material is the ring containing 30% aluminium nitride powder
Oxygen tree fat；Described liquid nitrogen transfusion pipe and nitrogen exhaust pipe are located at liquid nitrogen room cover plate indoor temperature end；Described elastic bellows are closed
Inside is used as liquid nitrogen chamber, and in magnetization process, elastic bellows enclosed interior contains liquid nitrogen cooling agent；Described is scalable electrically tactile
Point is between conducting heavy current rod and the short copper rod of changeover portion, and its both ends is lined with goldleaf or silver foil, to reduce connecing between copper solid
Thermal resistance is touched, to reduce heat transfer temperature difference.
Preferably, described drawing mechanism is made up of regulation soket head cap screw, pressing plate and fixed mount, above-mentioned consolidates
Determine frame and be fixed on liquid nitrogen room cover plate indoor temperature end；Described pressing plate is by fastening the indoor temperature end of soket head cap screw and conducting heavy current rod
Upper end is fixed；In magnetization process, described extension type, which often guides line segment, also includes wiring nose, and described wiring nose leads to
The indoor temperature end upper end for crossing fastening soket head cap screw and conducting heavy current rod is fixed；Described fastening soket head cap screw is led with high current
An insulation spacer and a flat shim are lined between the indoor temperature end upper end of torch, insulation spacer is positioned at fastening soket head cap screw
Bottom surface, flat shim are located at the bottom surface of insulation spacer.
Preferably, the described short copper rod of high-temperature superconductor transition lead wire section major shift section, fixed socket, insulation bending,
Copper component, cold screen, insulation film composition outside high temperature superconductive wire, high temperature superconductive wire；Described extension type often guides line segment and set
There is conducting heavy current rod, the short copper rod of described changeover portion is fixed on fixed socket, the short copper rod upper end of changeover portion and above-mentioned big electricity
Conductance torch lower end electrically connects in scalable electrical contact, and the short copper rod lower end of changeover portion is lined with insulation bending；Described fixation is inserted
Seat is both secured to cold screen with insulation bending；Joule heat caused by the short copper rod of described changeover portion and the heat conduction to low-temperature end transmission are leaked
Heat, it is pulled away by the cold screen being connected with one-level cold head；It is provided between described high-temperature superconductor transition lead wire section and described cold screen
Thermal conductivity is good but the insulation film of electric insulation, and described insulating film material is poly- phthalimide, polyfluorinated ethylene propylene or polyethers
Ether ketone film；For described high temperature superconductive wire with its exterior copper components welding at changeover portion copper rod, it is embedded in outside copper component
In, realize conversion of the electric current from normal conductor to superconductor；Described high temperature superconductive wire is the Bi-2223 superconducting lines of Ag-Au jackets,
With low thermal conductivity factor, at work, hts band superconducting state, Joule heat can be avoided, reduce the leakage heat to cryogenic system.
Preferably, described low-temperature superconducting lead-out wires of coil section mainly includes low-temperature superconducting lead-out wires of coil, high temperature surpasses
Wire, thermally coupled copper piece.Described high temperature superconductive wire realizes the electrical connection with superconducting coil by low-temperature superconducting lead-out wires of coil；
Described thermally coupled copper piece is located between cold head and low-temperature superconducting lead-out wires of coil, realizes cold head and low-temperature superconducting lead-out wires of coil
Section it is thermally coupled.
Preferably, described conducting heavy current rod lower end and the short copper rod upper end of changeover portion are electric in scalable electrical contact
Contact connection；The short copper rod lower end of described changeover portion and high-temperature superconductor wire bonding；High temperature superconductive wire is drawn with low-temperature superconducting coil
Line realizes that superconduction connects by superconducting joint；Whole piece is formd to magnetize the current path of lead.
Preferably, described extension type, which often guides line segment, also includes vacuum cap, described vacuum cap terminates in excitation
It is seal-installed on liquid nitrogen room cover plate indoor temperature end later.
This utility model utilizes elastic bellows, realizes and entirely magnetizes the stage, the protection to Dewar vacuum environment.
This utility model utilizes draught head, ensures the engagement of scalable electrical contact in the stage of magnetizing.
This utility model is realized using drawing mechanism and telescopically engages and depart from scalable electrical contact,
Separation between scalable electrical contact, is not only disconnected electrical connection, has also blocked conduction leakage of the indoor temperature end to one-level cold head
Heat.
This utility model realizes the duplicate protection of Dewar vacuum environment, prevented using vacuum cap is installed after end of magnetizing
Due to high current copper rod and the elastic corrugated seal of tube with reference to failure and that triggers quench danger, no liquid helium magnet greatly improved
Stability.
Brief description of the drawings
Fig. 1 is no liquid helium superconducting magnet structure schematic diagram of the present utility model；
Fig. 2 is two conducting heavy current rod structural representations；
Fig. 3 is two conducting heavy current rod section of structures；
Fig. 4 is the normal guide wire segment structure schematic diagram of extension type；
Fig. 5 is the normal guide wire segment structure profile of extension type；
Fig. 6 is drawing mechanism structural representation；
Fig. 7 is the external power wiring construction schematic diagram that magnetizes；
Fig. 8 is high-temperature superconductor transition lead wire segment structure schematic diagram；
Fig. 9 is low-temperature superconducting lead-out wires of coil segment structure schematic diagram；
Figure 10 finishes vacuum cap mounting structure schematic diagram to magnetize.
In figure：1 extension type often guides line segment, 10 conducting heavy current rods, 101 screwed holes, 102 annular stop grooves, 11
Insulated enclosure axle sleeve, 12 liquid nitrogen transfusion pipes, 13 nitrogen exhaust pipes, 14 liquid nitrogen room cover plates, 15 trip bolts, 16 elastic bellows,
17 fabroil bottom plates, 18 double-deck epoxy resin layers, 19 beckets, 2 high-temperature superconductor transition lead wire sections, 20 it is scalable electrically touch
Point, the short copper rod of 21 changeover portions, 22 fixed sockets, 23 insulation bendings, 24 high temperature superconductive wires, 25 high temperature superconductive wires outside copper component, 3
In low-temperature superconducting lead-out wires of coil section, 31 low-temperature superconducting lead-out wires of coil, 32 thermally coupled copper piece, 4 drawing mechanisms, 41 are adjusted
Hex screw, 42 pressing plates, 43 fixed mounts, 51 fastening soket head cap screws, 52 wiring noses, 61 vacuum dewars, 62 sealing flanges, 71
Cold head, 72 cold screens, 8 superconducting coils, 9 vacuum caps.
Embodiment
The utility model is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in Fig. 1, a kind of extension type of the present utility model magnetizes current lead device, including is arranged on liquid nitrogen chamber
Interior extension type often guides line segment 1, surpasses with the hot linked high-temperature superconductor transition lead wire section 2 of cold head 71, and low temperature
Loop draws the three parts of line segment 3；Described extension type often guides line segment 1 and connects high-temperature part；Described high temperature surpasses
Lead transition lead wire section 2 and connect low temperature part；Described low-temperature superconducting lead-out wires of coil section 3 connects superconducting coil 8；It is described
Extension type often guide the lower end of line segment 1 and the described upper end of high-temperature superconductor transition lead wire section 2 be plugged in it is scalable electrically
Contact 20；The described lower end of high-temperature superconductor transition lead wire section 2 is welded to connect with low-temperature superconducting lead-out wires of coil section 3.
As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, one kind of the present utility model is scalable to magnetize
The extension type of thread guide devices, which often guides line segment 1, includes two conducting heavy current rods 10, insulated enclosure axle sleeve 11, liquid nitrogen
Woven hose 12, nitrogen exhaust pipe 13, liquid nitrogen room cover plate 14, liquid nitrogen refrigerating agent, trip bolt 15, elastic bellows
16th, fabroil bottom plate 17, double-deck epoxy resin layer 18, becket 19, drawing mechanism 4, sealing flange 62
, fastening soket head cap screw 51 etc..
As shown in Fig. 2 and Fig. 3, described two conducting heavy current rods 10 are high conductive material, such as highly conductive red copper
Rod；The upper end inwall processing of two described conducting heavy current rods 10 has the spiral shell with the fastening size fit of soket head cap screw 51
Pit 101；Two described conducting heavy current rods are formed with sealing flange 62 by insulated enclosure axle sleeve 11 and are electrically insulated
And vacuum sealing；Described insulated enclosure axle sleeve 11 is enclosed between conducting heavy current rod 10 and sealing flange 62；It is described
The lower ends of two conducting heavy current rods 10 be provided with annular stop groove 102.
As shown in Fig. 4 and Fig. 5, the described top of cold head 71 is provided with a vacuum dewar 61, described vacuum Du
Watt 61 upper cover plates are provided with the circular hole that installation extension type often guides line segment 1, along being welded with sealing flange 62 on above-mentioned circular hole；
The described lower end of liquid nitrogen room cover plate 14 is fixed by trip bolt 15 and sealing flange 62, be machined with inside it one it is suitable
When the elastic bellows 16 of length, two circular holes for two conducting heavy current rods 10 are provided among it, are also divided among it
Feed flow nitrogen woven hose 12 and two circular holes of nitrogen exhaust pipe 13 are not provided with；Described elastic bellows 16 are around setting
Outside two conducting heavy current rods 10, its upper end is welded in liquid nitrogen room cover plate 14, and its lower end passes through fabroil bottom plate
Two circular holes of 17 processing are fixed with the parallel coaxial of conducting heavy current rod 10；Table in the described lower end of elastic bellows 16
Face welding has becket 19, and it is fixed fabroil bottom plate 17 by becket 19；Described fabroil bottom plate
17 are arranged between double-deck epoxy resin layer 18；Described double-deck epoxy resin layer 18 passes through glued annular stop groove
102 fix two conducting heavy current rods 10 with fabroil bottom plate 17, by two conducting heavy current rods 10 and elasticity
Bellows 16 mechanically connects；Described double-deck epoxy resin layer 18 is made up of aluminium nitride epoxy resin composite material, aluminium nitride
Epoxy resin composite material is the epoxy resin containing 30% aluminium nitride powder；Described liquid nitrogen transfusion pipe 12 and nitrogen row
Tracheae 13 is located at the indoor temperature end of liquid nitrogen room cover plate 14；The described enclosed interior of elastic bellows 16 magnetizes as liquid nitrogen chamber
During, the enclosed interior of elastic bellows 16 contains liquid nitrogen cooling agent, and conducting heavy current rod 10 is cooled down；Described
Scalable electrical contact 20 is located between conducting heavy current rod 10 and the short copper rod 21 of changeover portion, its both ends be lined with goldleaf or
Silver foil, to reduce the thermal contact resistance between copper solid, to reduce heat transfer temperature difference.
As shown in Fig. 6 and Fig. 7, described drawing mechanism 4 is by regulation soket head cap screw 41, the and of pressing plate 42
Fixed mount 43 forms, and above-mentioned fixed mount 43 is fixed on the indoor temperature end of liquid nitrogen room cover plate 14；Described pressing plate 42 passes through
The indoor temperature end upper end of fastening soket head cap screw 51 and conducting heavy current rod 10 is fixed；In magnetization process, described stretches
Contracting formula, which often guides line segment 1, also includes wiring nose 52, and described wiring nose 52 is by fastening soket head cap screw 51 and big electricity
The indoor temperature end upper end of conductance torch 10 is fixed；The described priority of fastening soket head cap screw 51 is by pressing plate 42, wiring nose 52
Fixed with conducting heavy current rod 10；The indoor temperature end upper end of described fastening soket head cap screw 51 and conducting heavy current rod 10
Between be lined with an insulation spacer and a flat shim, insulation spacer is positioned at the bottom surface of fastening soket head cap screw 51, flat shim
Positioned at the bottom surface of insulation spacer.
As shown in Fig. 8, a kind of high-temperature superconductor transition lead wire section 2 of the scalable thread guide devices that magnetize of the present utility model
Outside the short copper rod 21 of changeover portion, fixed socket 22, insulation bending 23, high temperature superconductive wire 24, high temperature superconductive wire
Copper component 25, cold screen 72, insulation film；Described extension type often guides line segment 1 and is provided with conducting heavy current rod 10, institute
The short copper rod 21 of changeover portion stated is fixed on fixed socket 22, the short upper end of copper rod 21 of changeover portion with above-mentioned conducting heavy current rod 10
Hold and electrically connected in scalable electrical contact 20, the short lower end of copper rod 21 of changeover portion is lined with insulation bending 23；Described fixed socket
22 are both secured to cold screen 72 with insulation bending 23；Joule heat caused by the short copper rod 21 of described changeover portion and to low temperature
The heat conduction leakage heat that end is transmitted, is pulled away by the cold screen 72 being connected with one-level cold head；Described high-temperature superconductor transition lead wire section
The insulation film that thermal conductivity is good but is electrically insulated is provided between 2 and described cold screen 72, described insulating film material is poly- phthalein
Imines, polyfluorinated ethylene propylene or poly (ether ether ketone) film；Described high temperature superconductive wire 24 is welded in its outside copper component 25
At changeover portion copper rod, it is embedded in outside copper component 25, realizes conversion of the electric current from normal conductor to superconductor；Described height
Temperature superconductive line 24 is the Bi-2223 superconducting lines of Ag-Au jackets, has low thermal conductivity factor, at work, hts band surpasses
State is led, Joule heat can be avoided, reduces the leakage heat to cryogenic system.
As shown in Fig. 9, a kind of low-temperature superconducting lead-out wires of coil section 3 of the scalable thread guide devices that magnetize of the present utility model
Including low-temperature superconducting lead-out wires of coil 31, high temperature superconductive wire 24, thermally coupled copper piece 32.Described high temperature superconductive wire 24
Electrical connection with superconducting coil 8 is realized by low-temperature superconducting lead-out wires of coil 31；Described thermally coupled copper piece 32 is located at
Between cold head 71 and low-temperature superconducting lead-out wires of coil 31, cold head 71 and low-temperature superconducting lead-out wires of coil section 3 are realized
It is thermally coupled.
The scalable thread guide devices that magnetize of one kind of the present utility model, the described lower end of conducting heavy current rod 10 and changeover portion
The short upper end of copper rod 21 connects in the scalable electrical contact of electrical contact 20；The short lower end of copper rod 21 of described changeover portion and height
Temperature superconductive line 24 welds；High temperature superconductive wire 24 realizes that superconduction connects with low-temperature superconducting lead-out wires of coil 31 by superconducting joint
Connect；Whole piece is formd to magnetize the current path of lead.
As shown in Fig. 1, Fig. 6, Fig. 7 and Figure 10, when needing to magnetize to magnet, by described elastic bellows 16
It is arranged in vacuum dewar 61, after the vacuum environment of Dewar 61 is formed, it is vacuum environment to make the outside of elastic bellows 16, interior
Portion is atmospheric pressure environment.
The described initial setting up of scalable electrical contact 20 tightens the regulation of drawing mechanism 4 in released state
Soket head cap screw 41, pressing plate 42 is set to drive conducting heavy current rod 10 to move down, and conducting heavy current rod 10 and bullet
Property bellows 16 by epoxy resin layer 18 seal combine, effectively prevent the inner vacuum closed environment of vacuum dewar 61
It is destroyed by the relative motion of conducting heavy current rod 10 and elastic bellows 16, therefore elastic bellows 16 are with big electricity
Conductance torch 10 is moved down and extended, the lower surface short upper end of copper rod 21 of insertion changeover portion of conducting heavy current rod 10
In the groove in face, the electrical connection of scalable electrical contact 20 is realized.
After starting excitation operation, remove described drawing mechanism 4, but due to elastic bellows 16 outside, i.e.,
It is vacuum environment inside vacuum dewar 61, the inside of elastic bellows 16 is atmospheric pressure environment, and both have a draught head, therefore bullet
The bottom plate of the property interior lower end of bellows 16 is made elastic bellows 16 still in elongation state by downward pressure, scalable
Electrical contact 20 is also always maintained at connection status.
Described one end of wiring nose 52 is plugged into conducting heavy current rod 10 by fastening soket head cap screw 51 again
Upper end, its other end connection external power charging cable, starts excitation operation.
While excitation operates, the described inside of elastic bellows 16 is filled with liquid nitrogen cooling agent as liquid nitrogen chamber,
Liquid nitrogen is entered by liquid nitrogen transfusion pipe 12, after absorbing heat, vaporization occurs and is discharged by nitrogen exhaust pipe 13, ensures at liquid nitrogen chamber
In 77K temperature environments, and conduct is heat sink, reduces leakage heat of the powered conducting heavy current rod 10 to one-level cold head.
Magnetize after end, the frost that freezes is removed using electric-heating air blower, unscrew described fastening soket head cap screw 51 and move
Remove wiring nose 52；Described drawing mechanism 4 is installed again, unscrews hexagonal spiral shell screw 41 in regulation, makes pressing plate 42
Conducting heavy current rod 10 is driven to move up, elastic bellows 16 are moved up and contracted with conducting heavy current rod 10
Return, the scalable electrical contact 20 between the bottom of conducting heavy current rod 10 and high-temperature superconductor transition lead wire section 2 separates suitable
When distance, return to initially-separate state.
Described extension type, which often guides line segment 1, also includes vacuum cap 9, finally installs described vacuum cap 9, vacuum cap 9
Internal with the inside of elastic bellows 16 be connected state, and will all be set inside vacuum cap 9 and inside elastic bellows 16
It is set to vacuum environment.
The method utilizes elastic bellows 16, realizes and entirely magnetizes the stage, the protection to Dewar vacuum environment；This side
Method utilizes draught head, ensures the engagement of scalable electrical contact 20 in the stage of magnetizing；The method utilizes drawing mechanism 4
Realize and telescopically engage and depart from scalable electrical contact 20, the separation between scalable electrical contact, not only
Electrical connection is disconnected, has also blocked indoor temperature end to the conductive heat leakage of one-level cold head；The method is true using being installed after end of magnetizing
Empty cap 9, the duplicate protection of Dewar vacuum environment is realized, prevented because high current copper rod with the elastic corrugated seal of tube is combined mistake
Effect and trigger quench danger, the stability of no liquid helium magnet greatly improved.
Above-mentioned above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as the scope of protection of the utility model.
Claims (9)
- The current lead device 1. a kind of extension type magnetizes, it is characterised in that the extension type including being arranged on liquid nitrogen indoor is normal Guide line segment（1）, with cold head（71）Hot linked high-temperature superconductor transition lead wire section（2）, and low-temperature superconducting lead-out wires of coil section （3）Three parts；Described extension type often guides line segment（1）Connect high-temperature part；Described high-temperature superconductor transition lead wire section（2） Connect low temperature part；Described low-temperature superconducting lead-out wires of coil section（3）Connect superconducting coil（8）；Described extension type is often led Lead segments（1）Lower end and described high-temperature superconductor transition lead wire section（2）Upper end is connected by inserting mode, and junction, which is provided with, to stretch Contracting electrical contact（20）；Described high-temperature superconductor transition lead wire section（2）Lower end and low-temperature superconducting lead-out wires of coil section（3）Welding connects Connect.
- The current lead device 2. a kind of extension type according to claim 1 magnetizes, it is characterised in that described is scalable Formula often guides line segment（1）Including two conducting heavy current rods（10）, insulated enclosure axle sleeve（11）, liquid nitrogen transfusion pipe（12）, nitrogen Blast pipe（13）, liquid nitrogen room cover plate（14）, liquid nitrogen refrigerating agent, trip bolt（15）, elastic bellows（16）, fabroil bottom plate （17）, double-deck epoxy resin layer（18）, becket（19）, drawing mechanism（4）, sealing flange（62）, hexagonal spiral shell in fastening Nail（51）.
- The current lead device 3. a kind of extension type according to claim 2 magnetizes, it is characterised in that described two are big Current conduction rod（10）For high conductive material；Two described conducting heavy current rods（10）Upper end inwall processing have with fastening in Hex screw（51）The screwed hole of size fit（101）；Two described conducting heavy current rods rely on insulated enclosure axle sleeve（11） With sealing flange（62）Form electric insulation and vacuum sealing；Described insulated enclosure axle sleeve（11）It is enclosed on conducting heavy current rod（10） With sealing flange（62）Between；Two described conducting heavy current rods（10）Lower end be provided with annular stop groove（102）.
- The current lead device 4. a kind of extension type according to claim 2 magnetizes, it is characterised in that described cold head （71）Top is provided with a vacuum dewar（61）, described vacuum dewar（61）Upper cover plate is provided with the installation normal guide wire of extension type Section（1）Circular hole, along being welded with sealing flange on above-mentioned circular hole（62）；Described liquid nitrogen room cover plate（14）Lower end passes through fastening Screw（15）With sealing flange（62）It is fixed, an elastic bellows are machined with inside it（16）, it is provided among it big for two Current conduction rod（10）Two circular holes, also have feed flow nitrogen woven hose among it（12）And nitrogen exhaust pipe（13）Two Individual circular hole；Described elastic bellows（16）It is circumferentially positioned at two conducting heavy current rods（10）Outside, its upper end are welded in liquid Nitrogen room cover plate（14）, its lower end passes through fabroil bottom plate（17）Two circular holes of processing and conducting heavy current rod（10）It is parallel same Axle is fixed；Described elastic bellows（16）Lower end inner surface welding has becket（19）, it passes through becket（19）Cloth will be pressed from both sides Bakelite bottom plate（17）It is fixed；Described fabroil bottom plate（17）It is arranged on double-deck epoxy resin layer（18）Between；Described is double Layer epoxy resin layer（18）Pass through glued annular stop groove（102）By two conducting heavy current rods（10）With fabroil bottom plate （17）It is fixed, by two conducting heavy current rods（10）With elastic bellows（16）Mechanically connect；Described double-deck epoxy resin layer （18）It is made up of aluminium nitride epoxy resin composite material；Described liquid nitrogen transfusion pipe（12）And nitrogen exhaust pipe（13）It is located at liquid nitrogen Room cover plate（14）Indoor temperature end；Described elastic bellows（16）Enclosed interior is as liquid nitrogen chamber, in magnetization process, elastic bellows （16）Enclosed interior contains liquid nitrogen cooling agent；Described scalable electrical contact（20）Positioned at conducting heavy current rod（10）With transition The short copper rod of section（21）Between, its both ends is lined with goldleaf or silver foil.
- The current lead device 5. a kind of extension type according to claim 2 magnetizes, it is characterised in that described stretching-machine Tool device（4）By regulation soket head cap screw（41）, pressing plate（42）And fixed mount（43）Composition, above-mentioned fixed mount（43）It is fixed on Liquid nitrogen room cover plate（14）Indoor temperature end；Described pressing plate（42）By fastening soket head cap screw（51）With conducting heavy current rod（10）'s Indoor temperature end upper end is fixed；In magnetization process, described extension type often guides line segment（1）Also include wiring nose（52）, institute The wiring nose stated（52）By fastening soket head cap screw（51）With conducting heavy current rod（10）Indoor temperature end upper end fix；It is described Fastening soket head cap screw（51）With conducting heavy current rod（10）Indoor temperature end upper end between be lined with an insulation spacer and one Flat shim, insulation spacer is positioned at fastening soket head cap screw（51）Bottom surface, flat shim is located at the bottom surface of insulation spacer.
- The current lead device 6. a kind of extension type according to claim 1 magnetizes, it is characterised in that described high temperature surpasses Lead transition lead wire section（2）Including the short copper rod of changeover portion（21）, fixed socket（22）, insulation bending（23）, high temperature superconductive wire（24）、 Copper component outside high temperature superconductive wire（25）, cold screen（72）, insulation film；Described extension type often guides line segment（1）Provided with big Current conduction rod（10）, the short copper rod of described changeover portion（21）It is fixed on fixed socket（22）, the short copper rod of changeover portion（21）Upper end With above-mentioned conducting heavy current rod（10）Lower end is in scalable electrical contact（20）Electrical connection, the short copper rod of changeover portion（21）Pad lower end There is insulation bending（23）；Described fixed socket（22）With the bending that insulate（23）It is both secured to cold screen（72）；Described high temperature surpasses Lead transition lead wire section（2）With described cold screen（72）Between be provided with that thermal conductivity is good but the insulation film of electric insulation；Described insulation Thin-film material is poly- phthalimide, polyfluorinated ethylene propylene or poly (ether ether ketone) film；Described high temperature superconductive wire（24）With its exterior copper Component（25）It is welded at changeover portion copper rod, it is embedded in outside copper component（25）In；Described high temperature superconductive wire（24）For Ag- The Bi-2223 superconducting lines of Au jackets.
- The current lead device 7. a kind of extension type according to claim 6 magnetizes, it is characterised in that described low temperature surpasses Loop draws line segment（3）Including low-temperature superconducting lead-out wires of coil（31）, high temperature superconductive wire（24）, thermally coupled copper piece（32）；Institute The high temperature superconductive wire stated（24）Pass through low-temperature superconducting lead-out wires of coil（31）Realization and superconducting coil（8）Electrical connection；Described Thermally coupled copper piece（32）Located at cold head（71）With low-temperature superconducting lead-out wires of coil（31）Between, realize cold head（71）With low-temperature superconducting Lead-out wires of coil section（3）It is thermally coupled.
- The current lead device 8. a kind of extension type according to claim 7 magnetizes, it is characterised in that described high current Contact rod（10）Lower end and the short copper rod of changeover portion（21）Upper end is in scalable electrical contact（20）Electrical contact connects；Described mistake Cross the short copper rod of section（21）Lower end and high temperature superconductive wire（24）Welding；High temperature superconductive wire（24）With low-temperature superconducting lead-out wires of coil（31） Realize that superconduction connects by superconducting joint；Whole piece is formd to magnetize the current path of lead.
- The current lead device 9. a kind of extension type according to claim 1 magnetizes, it is characterised in that described is scalable Formula often guides line segment（1）Also include vacuum cap（9）, described vacuum cap（9）Liquid nitrogen chamber is seal-installed on after excitation terminates Cover plate（14）Indoor temperature end.
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| CN201720290543.0U CN206849605U (en) | 2017-03-23 | 2017-03-23 | A kind of extension type magnetizes current lead device |
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| CN201720290543.0U CN206849605U (en) | 2017-03-23 | 2017-03-23 | A kind of extension type magnetizes current lead device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068329A (en) * | 2017-03-23 | 2017-08-18 | 杭州图锐科技有限公司 | A kind of extension type magnetizes current lead device and its application method |
| CN109273193A (en) * | 2018-12-04 | 2019-01-25 | 湖南迈太科医疗科技有限公司 | Current down-lead structure and superconducting magnet |
| CN109887702A (en) * | 2019-03-06 | 2019-06-14 | 上海交通大学 | A kind of current feed for high-temperature superconducting maglev train magnet excitation |
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2017
- 2017-03-23 CN CN201720290543.0U patent/CN206849605U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068329A (en) * | 2017-03-23 | 2017-08-18 | 杭州图锐科技有限公司 | A kind of extension type magnetizes current lead device and its application method |
| CN107068329B (en) * | 2017-03-23 | 2024-08-30 | 杭州图锐科技有限公司 | Telescopic magnetizing current lead device and application method thereof |
| CN109273193A (en) * | 2018-12-04 | 2019-01-25 | 湖南迈太科医疗科技有限公司 | Current down-lead structure and superconducting magnet |
| CN109273193B (en) * | 2018-12-04 | 2023-10-27 | 湖南迈太科医疗科技有限公司 | Current lead structure and superconducting magnet |
| CN109887702A (en) * | 2019-03-06 | 2019-06-14 | 上海交通大学 | A kind of current feed for high-temperature superconducting maglev train magnet excitation |
| CN109887702B (en) * | 2019-03-06 | 2021-06-22 | 上海交通大学 | Current lead for magnet excitation of high-temperature superconducting magnetic levitation train |
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