CN107424717A - A kind of superconducting magnet apparatus in magnetic resonance imaging system - Google Patents
A kind of superconducting magnet apparatus in magnetic resonance imaging system Download PDFInfo
- Publication number
- CN107424717A CN107424717A CN201710743001.9A CN201710743001A CN107424717A CN 107424717 A CN107424717 A CN 107424717A CN 201710743001 A CN201710743001 A CN 201710743001A CN 107424717 A CN107424717 A CN 107424717A
- Authority
- CN
- China
- Prior art keywords
- outer barrel
- inside conductor
- annulus
- conductor groove
- several
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
-
- 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
- H01F6/04—Cooling
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention discloses the superconducting magnet apparatus in a kind of magnetic resonance imaging system, including magnet inner cylinder and the outer barrel being sleeved on inner cylinder, the inner cylinder is provided with annulus, the annulus is provided with inside conductor groove, the wire of magnet is wrapped in inside conductor groove, the annulus is provided with two arc clamps, the clamp is provided with the upper wire grooves with inside conductor groove match, the annulus is provided with several through holes for passing through inside conductor groove walls to be connected with inside conductor groove, and the outer barrel is provided with the hold-down mechanism for compressing arc clamp.The magnet apparatus not only good cooling results, and fixation of the present invention, even more important magnet inner cylinder and outer barrel lifting stability are good, and displacement is less likely to occur coil, it is not easy to quenches, good operation stability.
Description
Technical field
The present invention relates to medical nuclear magnetic resonance equipment technical field, and in particular to the superconduction in a kind of magnetic resonance imaging system
Magnet apparatus.
Background technology
Medical imaging high-end product MRI markets are in the ascendant, and each side's force competition is abnormal fierce.Stabilization safe for operation, figure
As quality is good, low maintenance cost is basic demand that consumer proposes to such product.Core of the superconducting magnet as MRI system
Part, its rational design, stable operation are related to the performance of whole MRI system.The superconducting magnet that MRI system uses is general
It is made up of several groups of solenoid coils being wound on magnet skeleton.In order to produce the highfield uniformity needed for MR imagings, generally
All it is to set several groups of coil support structures being made up of wire casing to be used for the coiling of superconducting coil on the magnet skeleton, and ensures
Relative position relation between each group coil.In the operating condition, superconducting coil can be passed through the larger current of 500 to 1000 peaces times,
To produce the high magnetic field intensity needed for MRI system.At this moment, superconducting coil can produce in the presence of Lorentz force
Huge electromagnetic force, so that a central magnetic field intensity is 1.5T superconducting magnet as an example, some of which coil be subject to along magnet
The stress of axial direction can reach more than 100 tons.On the other hand, in the presence of electromagnetic force superconducting coil can also produce one it is huge
Circumference stress.In order to avoid superconducting line is damaged in the presence of this circumference stress, while winding superconducting coil
Certain winding tension can be applied, and in the higher constraint coil of the outside of coil one group of intensity of extra coiling.In view of above-mentioned
Two kinds of situations, the wire casing supporting construction of superconducting magnet must have enough mechanical strengths, pre- in coiling to bear coil
The powerful electromagnetic force that stress and coil are subject in the operating condition.Any coil support structure being made up of the wire casing
It is unstable, the micro-displacement of coil can be all caused, so as to cause quenching for magnet.One high intensity, coil branch rational in infrastructure
Stable operation of the support structure to superconducting magnet serves conclusive effect.
The content of the invention
Problem to be solved by this invention is to provide the superconducting magnet apparatus in a kind of magnetic resonance imaging system, of the invention
Magnet apparatus not only good cooling results, and fixation, even more important magnet inner cylinder and outer barrel lifting stability are good, and coil is not
Easily it is subjected to displacement, it is not easy to quench, good operation stability.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of superconduction in magnetic resonance imaging system
Magnet apparatus, including magnet inner cylinder and the outer barrel that is sleeved on inner cylinder, the inner cylinder are provided with annulus, the annulus
Inside conductor groove is provided with, the wire of magnet is wrapped in inside conductor groove, and the annulus is provided with two arc clamps,
The clamp is provided with the upper wire grooves with inside conductor groove match, and the annulus is provided with several and led through interior
The through hole that line groove wall connects with inside conductor groove, the sleeve between the inside conductor groove are provided with several diversion grooves,
The arc clamp is provided with several upper pod apertures for passing through clamp to be connected with upper wire grooves, and the arc clamp is provided with
Several upper water conservancy diversion through holes connected with diversion groove, the outer barrel is provided with the hold-down mechanism for compressing arc clamp, described
Hold-down mechanism includes several bolts for passing through outer barrel to be threadedly coupled therewith being distributed on outer barrel, diameter side of the screw rod along outer barrel
To being pressed on arc clamp, the position that bolt is corresponded on the arc clamp is provided with detent, bolt card in detent,
It can prevent bolt from shifting.
The bolt is provided with sealing mechanism, and the sealing mechanism includes being sleeved on vertical section on bolt to be trapezoidal outer close
Blocking, the outer screw the week side of boss of the outer barrel are provided with the tipper to match with sealing-plug, and the screw rod, which is provided with, to be used to compress sealing
The outer nut of plug.
Automatic secondary is provided with the outer barrel and compresses leakage-preventing mechanism, the automatic secondary, which compresses leakage-preventing mechanism, includes set
Vertical section is trapezoidal sealing-plug on bolt, and the outer barrel inner bolt hole the week side of boss is provided with the tipper to match with sealing-plug,
The screw rod is provided with the inner nut for being used for compressing sealing-plug, is provided with the outer barrel anti-loosening for driving inner nut to tighten
Drive mechanism, the anti-loosening drive mechanism include being arranged on the inner barrel of one end open in outer barrel, are provided with the inner barrel
Piston, the piston rod of the piston are tightly connected through the cylinder bottom of inner barrel and with cylinder bottom, and it is recessed that the piston rod is provided with bar shaped
Groove, the strip groove is interior to be provided with teeth, and the be hinged ratchet being engaged with teeth is provided with the inner barrel.
The drive mechanism includes the gear being arranged on inner nut, and the piston-rod end is provided with the tooth engaged with gear
Bar, the gear set are provided with the interior hexagonal hole being engaged with inner nut, the inner nut on inner nut, in the gear
It is provided with upper limit position block and lower position block.
The drive mechanism includes the driving through hole being arranged on inner nut, is provided with and is sleeved on screw rod in the outer barrel
Drive sleeve, the drive sleeve are provided with rotation connection bearing, and the outer ring of bearing is provided with exterior nut cap, and exterior nut cap is tightened in driving
On sleeve, bearing inner race described in drive sleeve, which is provided with, stretches into the rotary shaft that nut driving through hole driving inner nut rotates, described
Connecting cylinder under bearing inner race, the connecting cylinder are provided with toothed disc,
Driving rack on the piston rod engages with toothed disc.
The driving through hole is more than the diameter of rotary shaft.
The wire is hollow structure.
The wire is provided with supporting mechanism.
The supporting mechanism is triangular support body.
The triangular support body is triangular hollow support frame.
The wire is provided with several through holes with hollow cavity UNICOM.
The wire is connected with liquid helium refrigeration machine, and the liquid helium refrigeration machine drain pipe connects three-way connection, three-way connection one
End is connected with liquid helium chamber, and the other end is connected with wire.
Inner cylinder, suit and the side plate of the present invention constitutes liquid helium chamber, annulus is installed with inner cylinder, in annulus milling
Inside conductor groove has been cut, wire has been wrapped on inside conductor groove, annulus passes through inside conductor groove walls provided with several
The through hole connected with inside conductor groove, is easy to liquid helium and conductive contact, and the annulus is provided with two arc clamps, is used for
Wire is fixed, the clamp is provided with the upper wire grooves with inside conductor groove match, if the annulus is provided with
The dry through hole connected through inside conductor groove walls with inside conductor groove, is easy to liquid helium and conductive contact, and increase cools down contact surface,
Sleeve between the inside conductor groove is provided with several diversion grooves, and the arc clamp passes through clamp provided with several
The upper pod apertures connected with upper wire grooves, the arc clamp lead to provided with several upper water conservancy diversion connected with diversion groove
Hole, good fixation is not only acted as, and liquid helium and conductive contact area are big, cooling effect, the outer barrel is provided with arc
The hold-down mechanism that clevis body compresses.The hold-down mechanism include be distributed on outer barrel several be threadedly coupled therewith through outer barrel
Bolt, diametric(al) of the screw rod along outer barrel be pressed on arc clamp.Press-loading device, annulus and the clamp of the present invention is adopted
Be made of composite, make the superconducting magnet structure described herein weight of itself relative to existing superconducting magnet structure from
The weight of body becomes lighter, structure becomes more stable, and is also not easy occur what is quenched after carrying out above-mentioned improvement, during use
Working condition, during actual test, passing through electric current, normal current 500A, by electric current no more than wire is maximum allowable
612A is increased to, operation does not occur quenching failure for 1 year, while is not subjected to displacement through dissembling inspection wire, is adopted in test process
With the structure of prior art, the patent as disclosed in CN103887035B, normal power-up 500A, test 1 year and occur quenching once,
Electric current is increased to 612A, and test occurs quenching 3 times for 1 year.Meanwhile the superconducting magnet structure of the invention weight of itself is relatively
Gently, while hang the suspension of the liquid helium vessel to be made performance good, it is stable good, press-loading device need to only be tightened, dropped
The low manufacturing and maintenance and repair cost.The bolt is provided with sealing mechanism, and the sealing mechanism includes being sleeved on bolt
Vertical section is trapezoidal external seal plug, and the outer screw the week side of boss of the outer barrel is provided with the tipper to match with sealing-plug, the screw rod
It is provided with the outer nut for being used for compressing sealing-plug.Screw rod is provided with interior six side's grooves, and the cap the week side of boss of the screw rod is helicitic texture,
The cap provided with the checknut cylinder being threadedly coupled therewith, the flight pitch on the cap is more than between the screw thread on screw rod
Away from the thread barrel has checknut.Playing prevents thread barrel from loosening, and then plays and prevent screw bolt loosening.The outer barrel
The interior automatic secondary that is provided with compresses leakage-preventing mechanism, and the automatic secondary, which compresses leakage-preventing mechanism, to be included being sleeved on vertical section on bolt
For trapezoidal interior sealing plug, the outer barrel inner bolt hole the week side of boss is provided with the tipper to match with sealing-plug, and the screw rod is provided with
For compressing the inner nut of sealing-plug, it is provided with the outer barrel and is used to drive the anti-loosening drive mechanism that inner nut tightens, it is described
Anti-loosening drive mechanism includes being arranged on the inner barrel of one end open in outer barrel, and piston, the piston are provided with the inner barrel
Piston rod be tightly connected through the cylinder bottom of inner barrel and with cylinder bottom, piston rod slides therewith through cylinder bottom, will not gas leakage, piston
Interior only an atmospheric pressure, the piston rod are provided with strip groove, and the strip groove is interior to be provided with teeth, in the inner barrel
Provided with the be hinged ratchet being engaged with teeth.Screw rod is screwed into outer barrel screwed hole during use, by interior sealing plug sleeve on screw rod,
Inner nut is screwed on inner nut.The drive mechanism includes the gear being arranged on inner nut, and the piston-rod end is provided with
The rack engaged with gear, the gear set is on inner nut, provided with six sides in being engaged with inner nut in the gear
Shape hole, the inner nut are provided with upper limit position block and lower position block.Next in screw rod fixation, upper inner nut makes itself and outer barrel manually
Inwall is contacted, while interior sealing plug is pushed down, and now the wheel and rack contact on inner nut, can now be ventilated with liquid helium chamber,
Liquid helium chamber gas outlet seal, the increase of liquid helium chamber pressure, the movement of piston moving belt piston bar, piston rod band carry-over bar move, tooth
Band moving gear moves, while gear moves up, by inner nut on the one hand to be played good in outer tube inner surface tightly
Sealing function, good anti-loosening effect is on the other hand played, while pressure is bigger after liquid helium is passed through, and can play good
Pressuring action and sealing function, what is more important piston cylinder is interior to be provided with hinged claw, and it is piston rod that ratchet, which is stuck in teeth,
Can stretch out to retract, and play good anti-loosening effect, and in the test process of operation 1 year leakage did not occur for device
The problem of.Another inventor during 2-10 atmospheric pressure is passed through to liquid helium intracavitary, at each section, is kept by test
Corresponding air pressure 72 hours, using the Special seal device for preventing leakage of the present invention, air pressure is stablized, is not occurred a little letting out always
Dew；And use the simple sealing gasket of prior art to seal, occur slightly revealing when being passed through 2 atmospheric pressure to liquid helium intracavitary, press
During strong gradually increase, leakage is more serious.The drive mechanism includes the driving through hole being arranged on inner nut, described
The drive sleeve being sleeved on screw rod is provided with outer barrel, the drive sleeve is provided with rotation connection bearing, and the outer ring of bearing is set
There is exterior nut cap, exterior nut cap is tightened in drive sleeve, and bearing inner race described in drive sleeve, which is provided with, stretches into nut driving through hole drive
The rotary shaft that dynamic inner nut rotates, connecting cylinder under the bearing inner race, the connecting cylinder are provided with toothed disc, on the piston rod
Driving rack engaged with toothed disc.It can now be ventilated, liquid helium chamber gas outlet seal, the increase of liquid helium chamber pressure, lived with liquid helium chamber
The movement of moving belt piston bar is filled in, piston rod drives driving rack movement, the movement of rack drives drive gear, and drive gear drives
Inner nut rotates, by inner nut tightly to be provided with hinged claw, ratchet in what is more important piston cylinder in outer tube inner surface
It is that piston rod can only stretch out and can not retract to be stuck in teeth, plays good anti-loosening effect, and this is another kind of the invention
Drive mechanism, test effect are same as described above.It is after curved splint is bonded on sleeve, bolt is peaceful outside after coil is wound
On cylinder, inner nut and the leakage-preventing mechanism of secondary compression are installed in outer barrel, secondary side plate welds with inner cylinder, outer same can use.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the side structure schematic view of the embodiment of the present invention 1；
Fig. 3 is the structural representation of the embodiment of the present invention 2；
Fig. 4 is the side structure schematic view of the embodiment of the present invention 2；
Fig. 5 is the structural representation of the embodiment of the present invention 3；
Fig. 6 is the compacting sealing mechanism structural representation of the present invention；
Fig. 7 is another compacting sealing mechanism structural representation of the present invention；
Fig. 8 is the wire vertical profile structural representation of the embodiment of the present invention 6；
Fig. 9 is the wire vertical profile structural representation of the embodiment of the present invention 7.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing 1-9, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this
The part of the embodiment of invention, rather than whole embodiments.Based on described embodiments of the invention, the common skill in this area
The every other embodiment that art personnel are obtained, belongs to the scope of protection of the invention.
Embodiment one：A kind of superconducting magnet apparatus in magnetic resonance imaging system, including inner cylinder 8 and be sleeved on inner cylinder 8
Outer barrel 5, the inner cylinder is provided with annulus 13, and the annulus is provided with inside conductor groove 6, the wire winding of magnet
In interior wire grooves, the annulus is provided with two arc clamps 12, and the arc clamp is provided with recessed with inside conductor
The upper wire grooves 10 that groove matches, it is recessed through inside conductor groove walls 13-1 and inside conductor that the annulus is provided with several
The through hole 15 of groove connection, the sleeve between the inside conductor groove are provided with several diversion grooves 7, set on the arc clamp
There are several upper pod apertures 11 for passing through arc clamp to be connected with upper wire grooves, the arc clamp is provided with several with leading
The upper water conservancy diversion through hole 9 that groove 7 connects is flowed, the arc clamp is provided with several through upper wire grooves wall and upper wire grooves
The through hole 14-1 of 10 connections, the outer barrel are provided with the hold-down mechanism for compressing arc clamp.
The hold-down mechanism includes several bolts 4 for passing through outer barrel to be threadedly coupled therewith being distributed on outer barrel, screw rod
It is pressed in along the diametric(al) of outer barrel on arc clamp.
The bolt is provided with sealing mechanism, and the sealing mechanism includes being sleeved on vertical section on bolt to be trapezoidal outer close
Blocking 21, the outer screw the week side of boss of the outer barrel are provided with the tipper to match with sealing-plug, and the screw rod is provided with close for compressing
The outer nut 20 of blocking, bolt nut are provided with the locating rod 22 being threadedly coupled with nut, and locating rod is threadedly coupled with outer nut.
Automatic secondary is provided with the outer barrel and compresses leakage-preventing mechanism, the automatic secondary, which compresses leakage-preventing mechanism, includes set
Vertical section is trapezoidal sealing-plug 23 on bolt, and the outer barrel inner bolt hole the week side of boss is provided with the inclination to match with sealing-plug
Groove, the screw rod are provided with the inner nut 24 for being used for compressing sealing-plug, are provided with the outer barrel and are used to drive what inner nut tightened
Anti-loosening drive mechanism, the anti-loosening drive mechanism include being arranged on the inner barrel 33 of one end open in outer barrel, the inner cylinder
Piston 28 is provided with vivo, and the piston rod 34 of the piston is tightly connected through the cylinder bottom of inner barrel and with cylinder bottom, the piston rod
Strip groove 31 is provided with, teeth 29 are provided with the strip groove, is provided with the inner barrel and is hinged what is be engaged with teeth
Ratchet 32.
Piston rod righting mechanism is provided with the inner barrel.The piston rod righting mechanism is suit leading on the piston rod
To set 30.
The drive mechanism includes the gear 26 being arranged on inner nut, and the piston-rod end is provided with what is engaged with gear
Rack 27, the gear set are provided with the interior hexagonal hole being engaged with inner nut 24 on inner nut 24, in the gear 26,
The inner nut is provided with upper limit position block 25 and lower position block.
Inner cylinder, suit and the side plate of the present invention constitutes liquid helium chamber, annulus is installed with inner cylinder, in annulus milling
Inside conductor groove has been cut, wire has been wrapped on inside conductor groove, annulus passes through inside conductor groove walls provided with several
The through hole connected with inside conductor groove, is easy to liquid helium and conductive contact, and the annulus is provided with two arc clamps, is used for
Wire is fixed, the clamp is provided with the upper wire grooves with inside conductor groove match, if the annulus is provided with
The dry through hole connected through inside conductor groove walls with inside conductor groove, is easy to liquid helium and conductive contact, and increase cools down contact surface,
Sleeve between the inside conductor groove is provided with several diversion grooves, and the arc clamp passes through clamp provided with several
The upper pod apertures connected with upper wire grooves, the arc clamp lead to provided with several upper water conservancy diversion connected with diversion groove
Hole, good fixation is not only acted as, and liquid helium and conductive contact area are big, cooling effect, the outer barrel is provided with arc
The hold-down mechanism that clevis body compresses.The hold-down mechanism include be distributed on outer barrel several be threadedly coupled therewith through outer barrel
Bolt, diametric(al) of the screw rod along outer barrel be pressed on arc clamp.
The bolt is provided with sealing mechanism, and the sealing mechanism includes being sleeved on vertical section on bolt to be trapezoidal outer close
Blocking, the outer screw the week side of boss of the outer barrel are provided with the tipper to match with sealing-plug, and the screw rod, which is provided with, to be used to compress sealing
The outer nut of plug.Screw rod is provided with interior six side's grooves 18, and the cap the week side of boss of the screw rod be helicitic texture, the cap provided with
Threaded connection checknut cylinder, the flight pitch on the cap is more than the flight pitch on screw rod, and the thread barrel is divided into
There is checknut.Playing prevents thread barrel from loosening, and then plays and prevent screw bolt loosening.
Automatic secondary is provided with the outer barrel and compresses leakage-preventing mechanism, the automatic secondary, which compresses leakage-preventing mechanism, includes set
Vertical section is trapezoidal interior sealing plug on bolt, and the outer barrel inner bolt hole the week side of boss is provided with the inclination to match with sealing-plug
Groove, the screw rod are provided with the inner nut for being used for compressing sealing-plug, are provided with the outer barrel anti-for driving inner nut to tighten
Loosen drive mechanism, the anti-loosening drive mechanism includes being arranged on the inner barrel of one end open in outer barrel, in the inner barrel
Provided with piston, the piston rod of the piston is tightly connected through the cylinder bottom of inner barrel and with cylinder bottom, and the piston rod is provided with bar
Connected in star, the strip groove is interior to be provided with teeth, and the be hinged ratchet being engaged with teeth is provided with the inner barrel.Will during use
Screw rod is screwed into outer barrel screwed hole, and by interior sealing plug sleeve on screw rod, inner nut is screwed on inner nut.
The drive mechanism includes the gear being arranged on inner nut, and the piston-rod end is provided with the tooth engaged with gear
Bar, the gear set are provided with the interior hexagonal hole being engaged with inner nut, the inner nut on inner nut, in the gear
It is provided with upper limit position block and lower position block.Next in screw rod fixation, upper inner nut makes it be contacted with outer tube inner wall manually, simultaneously will
Interior sealing plug is pushed down, and now the wheel and rack contact on inner nut, can now be ventilated, liquid helium chamber gas outlet is close with liquid helium chamber
Envelope, the increase of liquid helium chamber pressure, the movement of piston moving belt piston bar, piston rod band carry-over bar move, the movement of rack drives gear,
Simultaneously gear move up, by inner nut tightly on the one hand to play good sealing function, the opposing party in outer tube inner surface
Good anti-loosening effect is played in face, while pressure is bigger after liquid helium is passed through, and can play good pressuring action and sealing
Effect, what is more important piston cylinder is interior to be provided with hinged claw, and it is that piston rod can only stretch out and can not contract that ratchet, which is stuck in teeth,
Return, play good anti-loosening effect, device in running the test process of 1 year do not occurred leakage the problem of.Another invention
People during 2-10 atmospheric pressure is passed through to liquid helium intracavitary, at each section, keeps corresponding air pressure 72 small by test
When, using the Special seal device for preventing leakage of the present invention, air pressure is stablized, is not occurred a little revealing always；And use existing skill
The simple sealing gasket sealing of art, occurs slightly revealing, the process that pressure gradually increases when being passed through 2 atmospheric pressure to liquid helium intracavitary
In, leakage is more serious.
Also it is not easy the working condition quenched occur after carrying out above-mentioned improvement, during use, during actual test,
In maximum allowable by electric current, the normal current 500A no more than wire, electric current is increased to 689A, operation is not lost for 1 year
Superfault, while be not subjected to displacement through dissembling inspection wire, the structure of prior art is used in test process, such as
Patent disclosed in CN103887035B, normal power-up 500A, test occur quenching once for 1 year, and electric current is increased to 622A, test
Occur within 1 year quenching 3 times.Meanwhile the weight of superconducting magnet structure of the invention itself is relatively light, while hang the liquid helium
It is good that the suspension of container is made performance, stable good, need to only tighten press-loading device, reduces and manufactures and maintenance and repair
Cost.
Embodiment two：A kind of superconducting magnet apparatus in magnetic resonance imaging system, including inner cylinder 8 and be sleeved on inner cylinder 8
Outer barrel 5, the inner cylinder is provided with annulus 13, and the annulus is provided with inside conductor groove 6, the wire winding of magnet
In interior wire grooves, wire is wound in circle, and the annulus is provided with two arc clamps 12, on the arc clamp
Provided with the upper wire grooves 10 with inside conductor groove match, the annulus passes through inside conductor groove walls provided with several
The through hole 15 connected with inside conductor groove, the sleeve between the inside conductor groove are provided with several diversion grooves 7, the arc
Clevis body is provided with several upper pod apertures 11 for passing through clamp to be connected with upper wire grooves, and the arc clamp is provided with some
The individual upper water conservancy diversion through hole 9 connected with diversion groove 7, the arc clamp are provided with several through upper wire grooves wall with above leading
The through hole 14-1 that line groove 10 connects.
The outer barrel is provided with the hold-down mechanism for compressing arc clamp.
The hold-down mechanism includes several bolts 4 for passing through outer barrel to be threadedly coupled therewith being distributed on outer barrel, screw rod
It is pressed in along the diametric(al) of outer barrel on arc clamp.
The bolt is provided with sealing mechanism, and the sealing mechanism includes being sleeved on vertical section on bolt to be trapezoidal outer close
Blocking 21, the outer screw the week side of boss of the outer barrel are provided with the tipper to match with sealing-plug, and the screw rod is provided with close for compressing
The outer nut 20 of blocking, bolt nut are provided with the locating rod 22 being threadedly coupled with nut, and locating rod is threadedly coupled with outer nut.
Side plate 2 between annulus and inner cylinder is provided with liquid helium air inlet pipe 1, and the outer barrel, which is provided with to freeze with liquid helium, is
The drain pipe 14 of system connection, upper wire grooves and lower wire groove composition guidewire lumen 3.
Automatic secondary is provided with the outer barrel and compresses leakage-preventing mechanism, the automatic secondary, which compresses leakage-preventing mechanism, includes set
Vertical section is trapezoidal sealing-plug 23 on bolt, and the outer barrel inner bolt hole the week side of boss is provided with the inclination to match with sealing-plug
Groove, the screw rod are provided with the inner nut 24 for being used for compressing sealing-plug, are provided with the outer barrel and are used to drive what inner nut tightened
Anti-loosening drive mechanism, the anti-loosening drive mechanism include being arranged on the inner barrel 33 of one end open in outer barrel, the inner cylinder
Piston 28 is provided with vivo, and the piston rod 34 of the piston is tightly connected through the cylinder bottom of inner barrel and with cylinder bottom, the piston rod
Strip groove 31 is provided with, teeth 29 are provided with the strip groove, is provided with the inner barrel and is hinged what is be engaged with teeth
Ratchet 32.
Piston rod righting mechanism is provided with the inner barrel.The piston rod righting mechanism is suit leading on the piston rod
To set 30.Side plate between the annulus and inner cylinder is provided with feed tube 1.
The drive mechanism includes the driving through hole being arranged on inner nut, is provided with and is sleeved on screw rod in the outer barrel
Drive sleeve, the drive sleeve are provided with rotation connection bearing, and the outer ring of bearing is provided with exterior nut cap, and exterior nut cap is tightened in driving
On sleeve, bearing inner race described in drive sleeve, which is provided with, stretches into the rotary shaft that nut driving through hole driving inner nut rotates, described
Connecting cylinder under bearing inner race, the connecting cylinder are provided with toothed disc, and the driving rack on the piston rod engages with toothed disc.
The diameter of the driving through hole is more than the diameter of rotary shaft.
Inner cylinder, suit and the side plate of the present invention constitutes liquid helium chamber, annulus is installed with inner cylinder, in annulus milling
Inside conductor groove has been cut, wire has been wrapped on inside conductor groove, annulus passes through inside conductor groove walls provided with several
The through hole connected with inside conductor groove, is easy to liquid helium and conductive contact, and the annulus is provided with two arc clamps, is used for
Wire is fixed, the clamp is provided with the upper wire grooves with inside conductor groove match, if the annulus is provided with
The dry through hole connected through inside conductor groove walls with inside conductor groove, is easy to liquid helium and conductive contact, and increase cools down contact surface,
Sleeve between the inside conductor groove is provided with several diversion grooves, and the arc clamp passes through clamp provided with several
The upper pod apertures connected with upper wire grooves, the arc clamp lead to provided with several upper water conservancy diversion connected with diversion groove
Hole, good fixation is not only acted as, and liquid helium and conductive contact area are big, cooling effect, the outer barrel is provided with arc
The hold-down mechanism that clevis body compresses.The hold-down mechanism include be distributed on outer barrel several be threadedly coupled therewith through outer barrel
Bolt, diametric(al) of the screw rod along outer barrel be pressed on arc clamp.
The bolt is provided with sealing mechanism, and the sealing mechanism includes being sleeved on vertical section on bolt to be trapezoidal outer close
Blocking, the outer screw the week side of boss of the outer barrel are provided with the tipper to match with sealing-plug, and the screw rod, which is provided with, to be used to compress sealing
The outer nut of plug.Screw rod is provided with interior six side's grooves 18, and the cap the week side of boss of the screw rod be helicitic texture, the cap provided with
Threaded connection checknut cylinder, the flight pitch on the cap is more than the flight pitch on screw rod, and the thread barrel is divided into
There is checknut.Playing prevents thread barrel from loosening, and then plays and prevent screw bolt loosening.
Automatic secondary is provided with the outer barrel and compresses leakage-preventing mechanism, the automatic secondary, which compresses leakage-preventing mechanism, includes set
Vertical section is trapezoidal interior sealing plug on bolt, and the outer barrel inner bolt hole the week side of boss is provided with the inclination to match with sealing-plug
Groove, the screw rod are provided with the inner nut for being used for compressing sealing-plug, are provided with the outer barrel anti-for driving inner nut to tighten
Loosen drive mechanism, the anti-loosening drive mechanism includes being arranged on the inner barrel of one end open in outer barrel, in the inner barrel
Provided with piston, the piston rod of the piston is tightly connected through the cylinder bottom of inner barrel and with cylinder bottom, and the piston rod is provided with bar
Connected in star, the strip groove is interior to be provided with teeth, and the be hinged ratchet being engaged with teeth is provided with the inner barrel.Will during use
Screw rod is screwed into outer barrel screwed hole, and by interior sealing plug sleeve on screw rod, inner nut is screwed on inner nut.
The drive mechanism includes the driving through hole 46 being arranged on inner nut, is provided with and is sleeved on screw rod in the outer barrel
Drive sleeve 47, the drive sleeve is provided with rotation connection bearing 41, and the outer ring of bearing is provided with exterior nut cap, and exterior nut cap 42 is stubborn
Tightly in drive sleeve, bearing inner race described in drive sleeve, which is provided with, stretches into the rotation that nut driving through hole driving inner nut rotates
Axle 40, connecting cylinder 43 under the bearing inner race, the connecting cylinder are provided with toothed disc 44, the driving rack on the piston rod with
Toothed disc engages.The oriented set for being easy to rack to insert is provided with the outer barrel, the stability of increase rack is played, prevents it
Skew, can now be ventilated with liquid helium chamber, liquid helium chamber gas outlet seal, and liquid helium chamber pressure increase, piston moving belt piston bar moves
Dynamic, piston rod drives driving rack movement, and the movement of rack drives drive gear, drive gear drives inner nut to rotate, by interior spiral shell
It is female tightly to be provided with hinged claw in outer tube inner surface, what is more important piston cylinder, it is piston that ratchet, which is stuck in teeth,
Bar, which can only stretch out, to retract, and play good anti-loosening effect, and this is another drive mechanism of the present invention, tests effect
It is essentially identical with the effect of embodiment 1.
The device of the present invention, inventor is in research process, to the MRI staff of Zhengzhou University and affiliated hospital of university
After communication exchange, and exchanged with the attendant of manufacturing enterprise, after the above-mentioned improvement of embodiment 2, during use also not
Easily there is the working condition quenched, during actual test, passing through electric current, normal current no more than wire is maximum allowable
For 500A, electric current is increased to 723A, operation does not occur quenching failure for 1 year, while is not subjected to displacement through dissembling inspection wire,
The structure of prior art is used in test process, the patent as disclosed in CN103887035B, normal power-up 500A, tests 1 year
Now quench once, electric current is increased to 623A, and test occurs quenching 3 times for 1 year.Meanwhile superconducting magnet structure of the invention itself
Weight is relatively light, while to be made performance good for the suspension for hanging the liquid helium vessel, stable good, only need to be by pressing machine
Structure tightens, and reduces and manufactures and maintenance and repair cost.
Embodiment three：The difference of itself and embodiment two is：The arc clamp is preferably semicircle clamp, and clamp is provided with
Screw thread, the arc clamp are threaded with thread bush, and the thread bush is provided with several passages, the passage and folder
Through hole connection on body, hold-down mechanism are pressed on thread bush, and coil fixation is more firm, using the above-mentioned improvement of embodiment 2
Afterwards, also it is not easy the working condition quenched occur during use, during actual test, maximum allowable no more than wire
By electric current, normal current 500A, electric current being increased to 863A, operation does not occur quenching failure for 1 year, while through dissembling inspection
Wire is not subjected to displacement, and the structure of prior art, the patent as disclosed in CN103887035B, positive normal open are used in test process
Electric 500A, test occur quenching once for 1 year, and electric current is increased to 623A, and test occurs quenching 3 times for 1 year.It is meanwhile of the invention
The weight of superconducting magnet structure itself is relatively light, while the suspension for hanging the liquid helium vessel good, the operation that is made performance
Stablize, press-loading device need to only be tightened, reduce and manufacture and maintenance and repair cost.
Example IV is distinguished as with embodiment three：Cryogenic adhesive is coated with wire winding, using existing skill
Adhesive in art, during actual test, passing through electric current, normal current 500A, general no more than wire is maximum allowable
Electric current is increased to 950A, and operation occurs quenching failure for 1 year.
Embodiment five is distinguished as with embodiment three：Cryogenic adhesive, side coated side pair are coated with wire winding
Wire is inflated, and prevents that it is made up of glue following parts by weight of raw materials by pupillary block on wire, ethylene propylene diene rubber 25-40 parts,
Nitrile rubber 50-70 parts, antioxidant D NP2-3, ethylene-butylene elastomer 7-12 parts, di-butyl nylonic acid ester 5-8, methyl
Zinc acrylate resin in-situ polymerization modified nano silicon nitride 4-7 parts, talcum powder 22-28 parts, reinforcing fiber 22-26 parts, APP 8-
12 parts, zinc oxide 4-6 parts, stearic acid 0.5-1.5 parts, cumyl peroxide 0.5-0.8 parts, sulphur 2-3 parts, N, N '-
Between penylene BMI 2-3 parts, diphenyl methane dimaleimide 1.6-2.0 parts, coumarone indene resin 8-10 parts, two
Ethylphosphinic acid aluminium 5-8 parts, 2-mercaptobenzimidazole 3-5 parts.During actual test, maximum allowable no more than wire
By electric current, normal current 500A, electric current is increased to 960A, operation occurs quenching failure for 1 year.
Embodiment six is distinguished as with embodiment five：The wire is hollow structure.
The wire 53 is provided with supporting mechanism.
The supporting mechanism 56 is triangular support body.
The triangular support body is triangular hollow support frame.
The wire is connected with liquid helium refrigeration system, and the liquid helium refrigeration system drain pipe connects three-way connection, and three connect
First end is connected with liquid helium chamber, and the other end is connected with wire, and wire is provided with liquid outlet, and liquid outlet is located at liquid helium intracavitary.Through surveying
Examination properties are better than embodiment five.
Embodiment seven is distinguished as with embodiment six：The wire is provided with several through holes connected with hollow cavity
55.Properties are better than embodiment six after tested.
Said apparatus is made of non-magnetic material.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention
Spirit and scope, all should cover among scope of the presently claimed invention.
Claims (2)
- A kind of 1. superconducting magnet apparatus in magnetic resonance imaging system, it is characterised in that：Magnet inner cylinder and it is sleeved on inner cylinder Outer barrel, the inner cylinder are provided with annulus, and the annulus is provided with inside conductor groove, and the wire of magnet is wrapped in interior lead In line groove, the annulus is provided with two arc clamps, and the clamp is provided with upper with inside conductor groove match Wire grooves, the annulus is provided with several through holes for passing through inside conductor groove walls to be connected with inside conductor groove, described Sleeve between inside conductor groove is provided with several diversion grooves, the arc clamp be provided with several through clamp with it is upper The upper pod apertures of wire grooves connection, the arc clamp are provided with several upper water conservancy diversion through holes connected with diversion groove, institute State outer barrel and be provided with the hold-down mechanism that compresses arc clamp, the hold-down mechanism include being distributed on outer barrel several pass through The bolt that outer barrel is threadedly coupled therewith, the arc clamp are provided with detent.
- 2. the superconducting magnet apparatus in magnetic resonance imaging system as claimed in claim 1, it is characterised in that：Set on the bolt There is a sealing mechanism, it be trapezoidal external seal plug that the sealing mechanism, which includes being sleeved on vertical section on bolt, outer barrel screw outside The week side of boss is provided with the tipper to match with sealing-plug, and the screw rod is provided with the outer nut for being used for compressing sealing-plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710743001.9A CN107424717B (en) | 2017-08-25 | 2017-08-25 | A kind of superconducting magnet apparatus in magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710743001.9A CN107424717B (en) | 2017-08-25 | 2017-08-25 | A kind of superconducting magnet apparatus in magnetic resonance imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107424717A true CN107424717A (en) | 2017-12-01 |
| CN107424717B CN107424717B (en) | 2019-03-12 |
Family
ID=60434353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710743001.9A Expired - Fee Related CN107424717B (en) | 2017-08-25 | 2017-08-25 | A kind of superconducting magnet apparatus in magnetic resonance imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107424717B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110448297A (en) * | 2018-05-07 | 2019-11-15 | 西门子(深圳)磁共振有限公司 | Body coil and MR imaging apparatus |
| CN111816402A (en) * | 2020-07-14 | 2020-10-23 | 周开 | Superconducting magnet based on annular superconducting sheet |
| CN114496454A (en) * | 2022-01-29 | 2022-05-13 | 中国科学院电工研究所 | High-cold-conduction low-quench niobium-tin superconducting coil and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4778539A (en) * | 1984-07-09 | 1988-10-18 | Mitsubishi Denki Kabushiki Kaisha | Process for producing a PbMo6 S8 type compound superconductor |
| JPH0794317A (en) * | 1993-05-18 | 1995-04-07 | Hitachi Ltd | Superconducting coil device |
| CN1794004A (en) * | 2004-12-22 | 2006-06-28 | 西门子公司 | Superconducting technology device |
| CN101499351A (en) * | 2008-10-29 | 2009-08-05 | 中国科学院电工研究所 | Coil used for fast impulse superconducting magnet winding structure |
| CN104183355A (en) * | 2013-11-12 | 2014-12-03 | 上海联影医疗科技有限公司 | Superconducting magnet system and shielding coil assembly |
| CN204834234U (en) * | 2015-08-12 | 2015-12-02 | 上海联影医疗科技有限公司 | A superconducting magnet for magnetic resonance imaging system |
-
2017
- 2017-08-25 CN CN201710743001.9A patent/CN107424717B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4778539A (en) * | 1984-07-09 | 1988-10-18 | Mitsubishi Denki Kabushiki Kaisha | Process for producing a PbMo6 S8 type compound superconductor |
| JPH0794317A (en) * | 1993-05-18 | 1995-04-07 | Hitachi Ltd | Superconducting coil device |
| CN1794004A (en) * | 2004-12-22 | 2006-06-28 | 西门子公司 | Superconducting technology device |
| CN101499351A (en) * | 2008-10-29 | 2009-08-05 | 中国科学院电工研究所 | Coil used for fast impulse superconducting magnet winding structure |
| CN104183355A (en) * | 2013-11-12 | 2014-12-03 | 上海联影医疗科技有限公司 | Superconducting magnet system and shielding coil assembly |
| CN204834234U (en) * | 2015-08-12 | 2015-12-02 | 上海联影医疗科技有限公司 | A superconducting magnet for magnetic resonance imaging system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110448297A (en) * | 2018-05-07 | 2019-11-15 | 西门子(深圳)磁共振有限公司 | Body coil and MR imaging apparatus |
| CN111816402A (en) * | 2020-07-14 | 2020-10-23 | 周开 | Superconducting magnet based on annular superconducting sheet |
| CN111816402B (en) * | 2020-07-14 | 2022-04-15 | 烟台精锐模具有限公司 | Superconducting magnet based on annular superconducting sheet |
| CN114496454A (en) * | 2022-01-29 | 2022-05-13 | 中国科学院电工研究所 | High-cold-conduction low-quench niobium-tin superconducting coil and manufacturing method thereof |
| CN114496454B (en) * | 2022-01-29 | 2023-12-19 | 中国科学院电工研究所 | High-conductivity cold low-quench niobium three-tin superconducting coil and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107424717B (en) | 2019-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107424717A (en) | A kind of superconducting magnet apparatus in magnetic resonance imaging system | |
| CN208308113U (en) | A kind of wire vent tension-adjusting gear on winding machine | |
| CN107424718A (en) | A kind of cold lifting superconducting magnet structure of magnetic resonance liquid | |
| CN108017000A (en) | A kind of Novel hoisting device | |
| CN105576556A (en) | Aluminum tape winding device | |
| CN110482315A (en) | A kind of layered windings wheel equipment | |
| CN101125626A (en) | Ring threading hoisting belt and its producing technology | |
| CN201750117U (en) | Armored cable connector for downhole instrument | |
| CN107815906A (en) | A kind of bar-shaped object spiral winding device | |
| CN1658343A (en) | Reinforcing device and method for high-temp superconducting coil | |
| CN105030428B (en) | Stretcher | |
| CN107511788A (en) | Threaded pre-tightening assembling structure | |
| CN209752044U (en) | Resistance adjusting device of trainer | |
| CN203296219U (en) | Composite type self-locking device for inner core and external mold of wall | |
| CN208361548U (en) | A kind of wire and cable core synthesis traction mechanism | |
| CN108861886A (en) | A kind of layered windings wheel of winding wire ropes | |
| CN105158071A (en) | Wire rope tensile strength circulation aid | |
| CN110370686A (en) | A kind of double composite material enhancing ring manufacture crafts | |
| CN109779266A (en) | A kind of tensioning equipment and its application method of supporting type anchorage | |
| CN112945599B (en) | Testing device and testing method for cable twisting machine | |
| CN109038362A (en) | A kind of replacement transmission line of electricity linear insulator specific purpose tool | |
| CN109036724A (en) | A kind of Z-shaped stranded wire apparatus and stranding machine | |
| CN208265467U (en) | A kind of tungsten wire rope spiral filament forming machine actinobacillus wheel with tension-adjusting gear | |
| CN208964275U (en) | A kind of steel strand rope line winder | |
| CN208221478U (en) | A kind of length-adjustable rope traction rope |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190312 Termination date: 20200825 |