CN107424717B - 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
- CN107424717B CN107424717B CN201710743001.9A CN201710743001A CN107424717B CN 107424717 B CN107424717 B CN 107424717B CN 201710743001 A CN201710743001 A CN 201710743001A CN 107424717 B CN107424717 B CN 107424717B
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- outer cylinder
- annulus
- inside conductor
- cylinder
- several
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
-
- 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
Abstract
The invention discloses the superconducting magnet apparatus in a kind of magnetic resonance imaging system, outer cylinder including magnet inner cylinder and suit on the inner cylinder, the inner cylinder is equipped with annulus, the annulus is equipped with inside conductor groove, the conducting wire of magnet is wrapped in inside conductor groove, arc clamp there are two being set on the annulus, the clamp is equipped with the upper wire grooves to match with inside conductor groove, the annulus is equipped with several and passes through the through-hole that inside conductor groove walls are connected to inside conductor groove, and the outer cylinder is equipped with the hold-down mechanism for compressing arc clamp.Magnet apparatus of the invention not only good cooling results, and fixation, even more important magnet inner cylinder and outer cylinder lifting stability are good, and coil is less likely to occur to be displaced, it is not easy to quench, good operation stability.
Description
Technical field
The present invention relates to medical nuclear magnetic resonance equipment technical fields, and in particular to the superconduction in a kind of magnetic resonance imaging system
Magnet apparatus.
Background technique
The market medical imaging high-end product MRI is in the ascendant, and the competition of each side's force is abnormal fierce.Operational safety is stable, schemes
It is basic demand that consumer proposes such product as high-quality, maintenance cost are low.Core of the superconducting magnet as MRI system
Component, reasonable design, stable operation are related to the performance of entire MRI system.The superconducting magnet that MRI system uses is general
The solenoid coil being wound on magnet skeleton by several groups forms.In order to generate the required highfield uniformity of MR imaging, usually
It is all the coil support structure that several groups are made of wire casing to be arranged on the magnet skeleton to be used for the coiling of superconducting coil, and guarantee
Relative positional relationship between each group coil.In the operating condition, superconducting coil can be passed through the larger current of 500 to 1000 peaces times,
With high magnetic field intensity needed for generating MRI system.At this moment, superconducting coil can generate under the action of Lorentz force
Huge electromagnetic force, by taking a central magnetic field intensity is the superconducting magnet of 1.5T as an example, some of them coil be subject to along magnet
Axial stress can achieve 100 tons or more.On the other hand, under the action of electromagnetic force superconducting coil can also generate one it is huge
Circumference stress.In order to avoid superconducting line is damaged under the action of this circumference stress, while winding superconducting coil
Certain winding tension can be applied, and in the higher constraint coil of one group of intensity of the additional coiling in the outside of coil.In view of above-mentioned
The wire casing support construction of two kinds of situations, 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 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, structurally reasonable coil branch
Support structure plays the role of the stable operation of superconducting magnet conclusive.
Summary of the invention
It is of the invention the problem to be solved by the invention is to provide the superconducting magnet apparatus in a kind of magnetic resonance imaging system
Magnet apparatus not only good cooling results, and fixation, even more important magnet inner cylinder and outer cylinder lifting stability are good, and coil is not
It is easy to happen 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 are as follows: the superconduction in a kind of magnetic resonance imaging system
Magnet apparatus, the outer cylinder including magnet inner cylinder and suit on the inner cylinder, the inner cylinder are equipped with annulus, the annulus
It is equipped with inside conductor groove, the conducting wire of magnet is wrapped in inside conductor groove, it is set on the annulus there are two arc clamp,
The clamp is equipped with the upper wire grooves to match with inside conductor groove, and the annulus is equipped with several and passes through interior lead
The through-hole that line groove wall is connected to inside conductor groove, it is recessed that the annulus between the inside conductor groove is equipped with several water conservancy diversion
Slot, the arc clamp are equipped with several and pass through the upper deflector hole that is connected to upper wire grooves of clamp, on the arc clamp
Equipped with the upper water conservancy diversion through-hole that several are connected to diversion groove, the outer cylinder is equipped with the hold-down mechanism for compressing arc clamp,
The hold-down mechanism includes that several being evenly arranged on outer cylinder pass through the bolt that outer cylinder is threadedly coupled therewith, and screw rod is along the straight of outer cylinder
Diameter direction is pressed on arc clamp, and the position that bolt is corresponded on the arc clamp is equipped with positioning groove, and bolt card is recessed in positioning
In slot, it can prevent bolt from shifting.
The bolt is equipped with sealing mechanism, and the sealing mechanism includes that be sleeved on longitudal section on bolt be trapezoidal outer close
Blocking, the outer screw hole side of the outer cylinder are equipped with the tipper to match with sealing-plug, and the screw rod is equipped with for compressing sealing
The outer nut of plug.
It is equipped with automatic secondary in the outer cylinder and compresses leakage-preventing mechanism, it includes set that the automatic secondary, which compresses leakage-preventing mechanism,
Longitudal section is trapezoidal sealing-plug on bolt, and outer cylinder inner bolt hole side is equipped with the tipper to match with sealing-plug,
The screw rod is equipped with the inner nut for compressing sealing-plug, is equipped in the outer cylinder anti-loosening for driving inner nut to tighten
Driving mechanism, the anti-loosening driving mechanism include that inner cylinder open at one end in outer cylinder is arranged in, and are equipped in the inner cylinder
Piston, the piston rod of the piston pass through the cylinder bottom of inner cylinder and are tightly connected with cylinder bottom, and it is recessed that the piston rod is equipped with bar shaped
Slot, the strip groove is interior to be equipped with teeth, is equipped with the pawl hingedly matched with teeth in the inner cylinder.
The driving mechanism includes the gear being arranged on inner nut, and the piston-rod end is equipped with the tooth engaged with gear
Item, the gear set are equipped with the interior hexagonal hole matched with inner nut, the inner nut on inner nut in the gear
It is equipped with upper limit position block and lower position block.
The driving mechanism includes the driving through-hole being arranged on inner nut, is equipped with and is sleeved on screw rod in the outer cylinder
Drive sleeve, the drive sleeve are equipped with rotation connection bearing, and the outer ring of bearing is equipped with exterior nut cap, and exterior nut cap is tightened in driving
On sleeve, bearing inner race described in drive sleeve is equipped with the rotation axis for protruding into nut driving through-hole driving inner nut rotation, described
Connecting cylinder under bearing inner race, the connecting cylinder are equipped with toothed disc,
Drive rack on the piston rod is engaged with toothed disc.
The driving through-hole is greater than the diameter of rotation axis.
The conducting wire is hollow structure.
The conducting wire is equipped with supporting mechanism.
The supporting mechanism is triangular support body.
The triangular support body is triangular hollow support frame.
The conducting wire is equipped with the through-hole of several and hollow cavity connection.
The conducting wire is connect with liquid helium refrigeration machine, and the liquid helium refrigeration machine outlet tube connects three-way connection, three-way connection one
End is connect with liquid helium chamber, and the other end is connect with conducting wire.
Inner cylinder, suit and side plate of the invention constitutes liquid helium chamber, is installed with annulus on inner cylinder, mills in annulus
Inside conductor groove has been cut, conducting wire has been wrapped on inside conductor groove, annulus is equipped with several and passes through inside conductor groove walls
The through-hole being connected to inside conductor groove, is convenient for liquid helium and conductive contact, sets that there are two arc clamps on the annulus, is used for
Conducting wire is fixed, the clamp is equipped with the upper wire grooves to match with inside conductor groove, if the annulus is equipped with
The dry through-hole being connected to across inside conductor groove walls with inside conductor groove, is convenient for liquid helium and conductive contact, increases cooling contact surface,
Annulus between the inside conductor groove is equipped with several diversion grooves, and the arc clamp is passed through equipped with several
The upper deflector hole that clamp is connected to upper wire grooves, the arc clamp are equipped with several upper water conservancy diversion being connected to diversion groove
Through-hole not only acts as good fixed function, and liquid helium and conductive contact area are big, cooling effect, and the outer cylinder is equipped with will
The hold-down mechanism that arc clamp compresses.The hold-down mechanism includes that several being evenly arranged on outer cylinder pass through outer cylinder screw thread company therewith
The bolt connect, screw rod are pressed on arc clamp along the diametrical direction of outer cylinder.Press-loading device of the invention, annulus and clamp are equal
It is made of composite material, makes the weight of superconducting magnet structure described herein itself relative to existing superconducting magnet structure
The weight of itself becomes lighter, structure becomes more stable, and after carrying out above-mentioned improvement, is also not easy to quench in use process
Working condition, during actual test, be no more than conducting wire it is maximum allowable by electric current, normal current 500A will be electric
Stream is increased to 612A, and operation does not occur quenching failure for 1 year, while not being subjected to displacement through dissembling inspection conducting wire, during the test
Using the structure of the prior art, the patent as disclosed in CN103887035B, normal power-up 500A is tested 1 year and is occurred quenching one
Secondary, electric current is increased to 612A, and test occurs quenching 3 times for 1 year.Meanwhile the weight of superconducting magnet structure of the invention itself is opposite
It is relatively light, while to be made performance good for the suspension for hanging the liquid helium vessel, it is stable good, press-loading device need to only be tightened,
It reduces and manufactures and maintenance and repair cost.The bolt is equipped with sealing mechanism, and the sealing mechanism includes being sleeved on bolt
Upper longitudal section is trapezoidal external seal plug, and the outer screw hole side of the outer cylinder is equipped with the tipper to match with sealing-plug, the spiral shell
Bar is equipped with the outer nut for compressing sealing-plug.Screw rod is equipped with interior six sides groove, and the cap side of the screw rod is screw thread knot
Structure, the cap equipped with the checknut cylinder being threadedly coupled therewith, the flight pitch on the cap is greater than the screw thread on screw rod
Spacing, the thread barrel have checknut.Playing prevents thread barrel from loosening, and then plays and prevent screw bolt loosening.It is described outer
It is equipped with automatic secondary in tin and compresses leakage-preventing mechanism, it is longitudinal sectional on bolt including being sleeved on that the automatic secondary compresses leakage-preventing mechanism
Face is trapezoidal interior sealing-plug, and outer cylinder inner bolt hole side is equipped with the tipper to match with sealing-plug, sets on the screw rod
There is the inner nut for compressing sealing-plug, the anti-loosening driving mechanism for driving inner nut to tighten, institute are equipped in the outer cylinder
Stating anti-loosening driving mechanism includes that inner cylinder open at one end in outer cylinder is arranged in, and piston, the work are equipped in the inner cylinder
The piston rod of plug passes through the cylinder bottom of inner cylinder and is tightly connected with cylinder bottom, and piston rod passes through cylinder bottom and slides therewith, will not gas leakage, it is living
Only one atmospheric pressure in filling in, the piston rod are equipped with strip groove, are equipped with teeth, the inner cylinder in the strip groove
It is interior equipped with the pawl hingedly matched with teeth.Screw rod is screwed into outer cylinder threaded hole when use, by interior sealing plug sleeve in screw rod
On, inner nut is screwed on inner nut.The driving mechanism includes the gear being arranged on inner nut, and the piston-rod end is set
There is the rack gear engaged with gear, the gear set is on inner nut, equipped in matching with inner nut six in the gear
Square hole, the inner nut are equipped with upper limit position block and lower position block.It is next in screw rod fixation, manually upper inner nut make its with it is outer
Cylinder inner wall contact, while interior sealing-plug being pushed down, the wheel and rack contact on inner nut at this time at this time can be logical with liquid helium chamber
Gas, liquid helium chamber gas outlet seal, liquid helium chamber pressure increase, and piston is mobile to drive piston rod mobile, and piston rod band carry-over bar is mobile,
Rack drives gear is mobile, while gear moves up, by inner nut on the one hand to play good in outer tube inner surface tightly
Sealing function, on the other hand play the role of good anti-loosening, while pressure is bigger after being passed through liquid helium, can play good
Pressuring action and sealing function, more importantly piston cylinder in be equipped with hinged claw, it is piston rod in teeth that pawl, which is stuck in,
Can only stretch out can not retract, and play the role of good anti-loosening, and there is no crossing to let out in 1 year test process of operation for device
The problem of dew.Another inventor during being passed through 2-10 atmospheric pressure to liquid helium is intracavitary, at each section, is protected by test
Corresponding air pressure 72 hours is held, using Special seal device for preventing leakage of the invention, air pressure is stable always, does not occur a little letting out
Dew；And the simple gasket of the prior art is used to seal, occur slightly revealing when being passed through 2 atmospheric pressure to liquid helium is intracavitary, press
During being gradually increased by force, reveal more serious.The driving mechanism includes the driving through-hole being arranged on inner nut, described
The drive sleeve being sleeved on screw rod is equipped in outer cylinder, the drive sleeve is equipped 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 equipped with, protrudes into nut driving through-hole drive
The rotation axis of dynamic inner nut rotation, connecting cylinder under the bearing inner race, the connecting cylinder are equipped with toothed disc, on the piston rod
Drive rack engaged with toothed disc.It can be ventilated at this time with liquid helium chamber, liquid helium chamber gas outlet seal, liquid helium chamber pressure increases, living
Plug is mobile to drive piston rod mobile, and piston rod drives drive rack mobile, and rack drives drive gear mobile, and driving gear band is dynamic
Inner nut rotation, by inner nut tightly will in outer tube inner surface, more importantly piston cylinder in be equipped with hinged claw, pawl
Being stuck in teeth is that piston rod can only be stretched out and can not be retracted, play the role of it is good anti-loosening, this be another kind of the invention
Driving mechanism, test effect are same as described above.After winding coil, after curved splint is sticked on sleeve, rather outside by bolt
On cylinder, inner nut and the leakage-preventing mechanism of secondary compression are installed in outer cylinder, it is secondary side plate and inner cylinder, outer with welding can be used.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
Fig. 1 is the structural schematic diagram 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 schematic diagram 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 schematic diagram of the embodiment of the present invention 3；
Fig. 6 is compacting sealing mechanism structural schematic diagram of the invention；
Fig. 7 is another compacting sealing mechanism structural schematic diagram of the invention；
Fig. 8 is the conducting wire vertical profile structural schematic diagram of the embodiment of the present invention 6；
Fig. 9 is the conducting wire vertical profile structural schematic diagram of the embodiment of the present invention 7.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing 1-9, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this
A part of the embodiment of invention, instead of all the embodiments.Based on described the embodiment of the present invention, the common skill in this field
Art personnel every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment one: the superconducting magnet apparatus in a kind of magnetic resonance imaging system, including inner cylinder 8 and be sleeved on inner cylinder 8
Outer cylinder 5, the inner cylinder is equipped with annulus 13, and the annulus is equipped with inside conductor groove 6, and the conducting wire of magnet is wound
In interior wire grooves, set on the annulus there are two arc clamp 12, the arc clamp is equipped with recessed with inside conductor
The upper wire grooves 10 that slot matches, it is recessed across inside conductor groove walls 13-1 and inside conductor that the annulus is equipped with several
The through-hole 15 of slot connection, the annulus between the inside conductor groove are equipped with several diversion grooves 7, the arc clamp
It is equipped with several and passes through the upper deflector hole 11 that arc clamp is connected to upper wire grooves, the arc clamp is equipped with several
The upper water conservancy diversion through-hole 9 being connected to diversion groove 7, the arc clamp are equipped with several and pass through upper wire grooves wall and upper conducting wire
The through-hole 14-1 that groove 10 is connected to, the outer cylinder are equipped with the hold-down mechanism for compressing arc clamp.
The hold-down mechanism includes that several being evenly arranged on outer cylinder pass through the bolt 4 that outer cylinder is threadedly coupled therewith, screw rod
Diametrical direction along outer cylinder is pressed on arc clamp.
The bolt is equipped with sealing mechanism, and the sealing mechanism includes that be sleeved on longitudal section on bolt be trapezoidal outer close
Blocking 21, the outer screw hole side of the outer cylinder are equipped with the tipper to match with sealing-plug, and the screw rod is equipped with close for compressing
The outer nut 20 of blocking, bolt nut are equipped with the locating rod 22 being threadedly coupled with nut, and locating rod is threadedly coupled with outer nut.
It is equipped with automatic secondary in the outer cylinder and compresses leakage-preventing mechanism, it includes set that the automatic secondary, which compresses leakage-preventing mechanism,
Longitudal section is trapezoidal sealing-plug 23 on bolt, and outer cylinder inner bolt hole side is equipped with the inclination to match with sealing-plug
Slot, the screw rod are equipped with the inner nut 24 for compressing sealing-plug, are equipped in the outer cylinder for driving inner nut to tighten
Anti-loosening driving mechanism, the anti-loosening driving mechanism include that inner cylinder 33 open at one end in outer cylinder, the inner cylinder is arranged in
It is equipped with piston 28 in vivo, the piston rod 34 of the piston passes through the cylinder bottom of inner cylinder and is tightly connected with cylinder bottom, the piston rod
It is equipped with strip groove 31, teeth 29 are equipped in the strip groove, is equipped in the inner cylinder and hingedly matched with teeth
Pawl 32.
Piston rod righting mechanism is equipped in the inner cylinder.The piston rod righting mechanism is suit leading on the piston rod
To set 30.
The driving mechanism includes the gear 26 being arranged on inner nut, and the piston-rod end is equipped with to be engaged with gear
Rack gear 27, the gear set are equipped with the interior hexagonal hole matched with inner nut 24 in the gear 26 on inner nut 24,
The inner nut is equipped with upper limit position block 25 and lower position block.
Inner cylinder, suit and side plate of the invention constitutes liquid helium chamber, is installed with annulus on inner cylinder, mills in annulus
Inside conductor groove has been cut, conducting wire has been wrapped on inside conductor groove, annulus is equipped with several and passes through inside conductor groove walls
The through-hole being connected to inside conductor groove, is convenient for liquid helium and conductive contact, sets that there are two arc clamps on the annulus, is used for
Conducting wire is fixed, the clamp is equipped with the upper wire grooves to match with inside conductor groove, if the annulus is equipped with
The dry through-hole being connected to across inside conductor groove walls with inside conductor groove, is convenient for liquid helium and conductive contact, increases cooling contact surface,
Annulus between the inside conductor groove is equipped with several diversion grooves, and the arc clamp is passed through equipped with several
The upper deflector hole that clamp is connected to upper wire grooves, the arc clamp are equipped with several upper water conservancy diversion being connected to diversion groove
Through-hole not only acts as good fixed function, and liquid helium and conductive contact area are big, cooling effect, and the outer cylinder is equipped with will
The hold-down mechanism that arc clamp compresses.The hold-down mechanism includes that several being evenly arranged on outer cylinder pass through outer cylinder screw thread company therewith
The bolt connect, screw rod are pressed on arc clamp along the diametrical direction of outer cylinder.
The bolt is equipped with sealing mechanism, and the sealing mechanism includes that be sleeved on longitudal section on bolt be trapezoidal outer close
Blocking, the outer screw hole side of the outer cylinder are equipped with the tipper to match with sealing-plug, and the screw rod is equipped with for compressing sealing
The outer nut of plug.Screw rod is equipped with interior six sides groove 18, and the cap side of the screw rod is helicitic texture, the cap be equipped with
Threaded connection checknut cylinder, the flight pitch on the cap is greater 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.
It is equipped with automatic secondary in the outer cylinder and compresses leakage-preventing mechanism, it includes set that the automatic secondary, which compresses leakage-preventing mechanism,
Longitudal section is trapezoidal interior sealing-plug on bolt, and outer cylinder inner bolt hole side is equipped with the inclination to match with sealing-plug
Slot, the screw rod are equipped with the inner nut for compressing sealing-plug, are equipped in the outer cylinder anti-for driving inner nut to tighten
Driving mechanism is loosened, the anti-loosening driving mechanism includes that inner cylinder open at one end in outer cylinder is arranged in, in the inner cylinder
Equipped with piston, the piston rod of the piston passes through the cylinder bottom of inner cylinder and is tightly connected with cylinder bottom, and the piston rod is equipped with item
Connected in star, the strip groove is interior to be equipped with teeth, is equipped with the pawl hingedly matched with teeth in the inner cylinder.It will when use
Screw rod is screwed into outer cylinder threaded hole, and interior sealing-plug is sleeved on the screw rod, inner nut is screwed on inner nut.
The driving mechanism includes the gear being arranged on inner nut, and the piston-rod end is equipped with the tooth engaged with gear
Item, the gear set are equipped with the interior hexagonal hole matched with inner nut, the inner nut on inner nut in the gear
It is equipped with upper limit position block and lower position block.Next in screw rod fixation, upper inner nut contacts it with outer tube inner wall manually, simultaneously will
Interior sealing-plug is pushed down, and the wheel and rack contact on inner nut, can be ventilated, liquid helium chamber gas outlet is close with liquid helium chamber at this time at this time
Envelope, liquid helium chamber pressure increase, and piston is mobile to drive piston rod mobile, and piston rod band carry-over bar is mobile, and rack drives gear is mobile,
Simultaneously gear move up, by inner nut tightly on the one hand to play good sealing function, another party in outer tube inner surface
Face is played the role of good anti-loosening, while pressure is bigger after being passed through liquid helium, can play good pressuring action and sealing
Effect, more importantly being equipped with hinged claw in piston cylinder, it is that piston rod can only be stretched out and can not be contracted that pawl, which is stuck in teeth,
It returns, plays the role of good anti-loosening, there is no crossing leakage to device in running 1 year test process.Another invention
People during being passed through 2-10 atmospheric pressure to liquid helium is intracavitary, at each section, keeps corresponding air pressure 72 small by test
When, using Special seal device for preventing leakage of the invention, air pressure is stable always, does not occur a little revealing；And use existing skill
The simple gasket sealing of art, occurs slightly revealing when being passed through 2 atmospheric pressure to liquid helium is intracavitary, the process that pressure is gradually increased
In, it reveals more serious.
Also it is not easy the working condition for occurring quenching after carrying out above-mentioned improvement, in use process, during actual test,
Being no more than, conducting wire is maximum allowable by electric current, normal current 500A, electric current is increased to 689A, operation is not lost for 1 year
Superfault, while not being subjected to displacement through dissembling inspection conducting wire, the structure of the prior art is used during the test, such as
Quenching once occur for 1 year in patent disclosed in CN103887035B, normal power-up 500A, test, 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 hanging 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: the superconducting magnet apparatus in a kind of magnetic resonance imaging system, including inner cylinder 8 and be sleeved on inner cylinder 8
Outer cylinder 5, the inner cylinder is equipped with annulus 13, and the annulus is equipped with inside conductor groove 6, and the conducting wire of magnet is wound
In interior wire grooves, conducting wire is wound in circle, is set on the annulus there are two arc clamp 12, on the arc clamp
Equipped with the upper wire grooves 10 to match with inside conductor groove, the annulus is equipped with several and passes through inside conductor groove walls
The through-hole 15 being connected to inside conductor groove, the annulus between the inside conductor groove are equipped with several diversion grooves 7, institute
It states arc clamp and passes through the upper deflector hole 11 that clamp is connected to upper wire grooves equipped with several, the arc clamp is equipped with
Several upper water conservancy diversion through-holes 9 being connected to diversion groove 7, the arc clamp be equipped with several pass through upper wire grooves wall with
The through-hole 14-1 that upper wire grooves 10 are connected to.
The outer cylinder is equipped with the hold-down mechanism for compressing arc clamp.
The hold-down mechanism includes that several being evenly arranged on outer cylinder pass through the bolt 4 that outer cylinder is threadedly coupled therewith, screw rod
Diametrical direction along outer cylinder is pressed on arc clamp.
The bolt is equipped with sealing mechanism, and the sealing mechanism includes that be sleeved on longitudal section on bolt be trapezoidal outer close
Blocking 21, the outer screw hole side of the outer cylinder are equipped with the tipper to match with sealing-plug, and the screw rod is equipped with close for compressing
The outer nut 20 of blocking, bolt nut are equipped 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 equipped with liquid helium air inlet pipe 1, and the outer cylinder, which is equipped with to freeze with liquid helium, is
The outlet tube 14 of system connection, upper wire grooves and lower wire groove form guidewire lumen 3.
It is equipped with automatic secondary in the outer cylinder and compresses leakage-preventing mechanism, it includes set that the automatic secondary, which compresses leakage-preventing mechanism,
Longitudal section is trapezoidal sealing-plug 23 on bolt, and outer cylinder inner bolt hole side is equipped with the inclination to match with sealing-plug
Slot, the screw rod are equipped with the inner nut 24 for compressing sealing-plug, are equipped in the outer cylinder for driving inner nut to tighten
Anti-loosening driving mechanism, the anti-loosening driving mechanism include that inner cylinder 33 open at one end in outer cylinder, the inner cylinder is arranged in
It is equipped with piston 28 in vivo, the piston rod 34 of the piston passes through the cylinder bottom of inner cylinder and is tightly connected with cylinder bottom, the piston rod
It is equipped with strip groove 31, teeth 29 are equipped in the strip groove, is equipped in the inner cylinder and hingedly matched with teeth
Pawl 32.
Piston rod righting mechanism is equipped in the inner cylinder.The piston rod righting mechanism is suit leading on the piston rod
To set 30.Side plate between the annulus and inner cylinder is equipped with inlet tube 1.
The driving mechanism includes the driving through-hole being arranged on inner nut, is equipped with and is sleeved on screw rod in the outer cylinder
Drive sleeve, the drive sleeve are equipped with rotation connection bearing, and the outer ring of bearing is equipped with exterior nut cap, and exterior nut cap is tightened in driving
On sleeve, bearing inner race described in drive sleeve is equipped with the rotation axis for protruding into nut driving through-hole driving inner nut rotation, described
Connecting cylinder under bearing inner race, the connecting cylinder are equipped with toothed disc, and the drive rack on the piston rod is engaged with toothed disc.
The diameter of the driving through-hole is greater than the diameter of rotation axis.
Inner cylinder, suit and side plate of the invention constitutes liquid helium chamber, is installed with annulus on inner cylinder, mills in annulus
Inside conductor groove has been cut, conducting wire has been wrapped on inside conductor groove, annulus is equipped with several and passes through inside conductor groove walls
The through-hole being connected to inside conductor groove, is convenient for liquid helium and conductive contact, sets that there are two arc clamps on the annulus, is used for
Conducting wire is fixed, the clamp is equipped with the upper wire grooves to match with inside conductor groove, if the annulus is equipped with
The dry through-hole being connected to across inside conductor groove walls with inside conductor groove, is convenient for liquid helium and conductive contact, increases cooling contact surface,
Annulus between the inside conductor groove is equipped with several diversion grooves, and the arc clamp is passed through equipped with several
The upper deflector hole that clamp is connected to upper wire grooves, the arc clamp are equipped with several upper water conservancy diversion being connected to diversion groove
Through-hole not only acts as good fixed function, and liquid helium and conductive contact area are big, cooling effect, and the outer cylinder is equipped with will
The hold-down mechanism that arc clamp compresses.The hold-down mechanism includes that several being evenly arranged on outer cylinder pass through outer cylinder screw thread company therewith
The bolt connect, screw rod are pressed on arc clamp along the diametrical direction of outer cylinder.
The bolt is equipped with sealing mechanism, and the sealing mechanism includes that be sleeved on longitudal section on bolt be trapezoidal outer close
Blocking, the outer screw hole side of the outer cylinder are equipped with the tipper to match with sealing-plug, and the screw rod is equipped with for compressing sealing
The outer nut of plug.Screw rod is equipped with interior six sides groove 18, and the cap side of the screw rod is helicitic texture, the cap be equipped with
Threaded connection checknut cylinder, the flight pitch on the cap is greater 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.
It is equipped with automatic secondary in the outer cylinder and compresses leakage-preventing mechanism, it includes set that the automatic secondary, which compresses leakage-preventing mechanism,
Longitudal section is trapezoidal interior sealing-plug on bolt, and outer cylinder inner bolt hole side is equipped with the inclination to match with sealing-plug
Slot, the screw rod are equipped with the inner nut for compressing sealing-plug, are equipped in the outer cylinder anti-for driving inner nut to tighten
Driving mechanism is loosened, the anti-loosening driving mechanism includes that inner cylinder open at one end in outer cylinder is arranged in, in the inner cylinder
Equipped with piston, the piston rod of the piston passes through the cylinder bottom of inner cylinder and is tightly connected with cylinder bottom, and the piston rod is equipped with item
Connected in star, the strip groove is interior to be equipped with teeth, is equipped with the pawl hingedly matched with teeth in the inner cylinder.It will when use
Screw rod is screwed into outer cylinder threaded hole, and interior sealing-plug is sleeved on the screw rod, inner nut is screwed on inner nut.
The driving mechanism includes the driving through-hole 46 being arranged on inner nut, is equipped with and is sleeved on screw rod in the outer cylinder
Drive sleeve 47, the drive sleeve is equipped with rotation connection bearing 41, and the outer ring of bearing is equipped with exterior nut cap, and exterior nut cap 42 is twisted
Tightly in drive sleeve, bearing inner race described in drive sleeve is equipped with the rotation for protruding into nut driving through-hole driving inner nut rotation
Axis 40, connecting cylinder 43 under the bearing inner race, the connecting cylinder are equipped with toothed disc 44, the drive rack on the piston rod with
Toothed disc engagement.It is equipped with the oriented set convenient for rack gear insertion in the outer cylinder, plays the stability for increasing rack gear, prevents it
Offset, can be ventilated at this time with liquid helium chamber, liquid helium chamber gas outlet seal, and liquid helium chamber pressure increases, and piston is mobile to drive piston rod to move
Dynamic, piston rod drives drive rack mobile, and rack drives drive gear mobile, and driving gear band moves inner nut rotation, by interior spiral shell
It is female tightly will be in outer tube inner surface, more importantly being equipped with hinged claw in piston cylinder, it is piston in teeth that pawl, which is stuck in,
Bar, which can only stretch out, to be retracted, play the role of it is good anti-loosening, this be another driving mechanism of the invention, test effect
It is essentially identical with the effect of embodiment 1.
The device of the invention, inventor in the course of the research, to the MRI staff of Zhengzhou University and affiliated hospital, university
It after communication exchange, and is exchanged with the attendant of manufacturing enterprise, after the above-mentioned improvement of embodiment 2, in use process also not
It is easy to appear the working condition quenched, during actual test, is passing through electric current, normal current no more than conducting wire is maximum allowable
For 500A, electric current is increased to 723A, operation does not occur quenching failure for 1 year, while not being subjected to displacement through dissembling inspection conducting wire,
The structure of the prior art, the patent as disclosed in CN103887035B are used in test process, normal power-up 500A goes out for test 1 year
It now quenches 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 equipped with
Screw thread, the arc clamp are threaded with thread bush, and the thread bush is equipped with several ventholes, the venthole and folder
Through-hole connection on body, hold-down mechanism are pressed on thread bush, and coil fixation is stronger, using the above-mentioned improvement of embodiment 2
Afterwards, also it is not easy the working condition for occurring quenching in use process, during actual test, conducting wire is maximum allowable being no more than
By electric current, electric current is increased to 863A by normal current 500A, and operation does not occur quenching failure for 1 year, while through dissembling inspection
Conducting wire is not subjected to displacement, uses the structure of the prior art, the patent as disclosed in CN103887035B, positive normal open during the test
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.Meanwhile it is 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, reduces and manufacture and maintenance and repair cost.
The difference of example IV and embodiment three are as follows: cryogenic adhesive is coated in conducting wire winding, using existing skill
Adhesive in art, it is maximum allowable by electric current, normal current 500A, general being no more than conducting wire during actual test
Electric current is increased to 950A, and operation occurs quenching failure for 1 year.
The difference of embodiment five and embodiment three are as follows: be coated with cryogenic adhesive, side coated side pair in conducting wire winding
Conducting wire inflation, prevents glue by pupillary block on conducting wire, is made of following parts by weight of raw materials, 25-40 parts of ethylene propylene diene rubber,
50-70 parts of nitrile rubber, antioxidant D NP2-3,7-12 parts of ethylene-butylene elastomer, di-butyl nylonic acid ester 5-8, methyl
4-7 parts of zinc acrylate resin in-situ polymerization modified nano silicon nitride, 22-28 parts of talcum powder, 22-26 parts of reinforcing fiber, ammonium polyphosphate 8-
12 parts, 4-6 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 0.5-0.8 parts of cumyl peroxide, 2-3 parts of sulphur, N, N '-
Between 2-3 parts of penylene bismaleimide, 1.6-2.0 parts of diphenyl methane dimaleimide, 8-10 parts of coumarone indene resin, two
5-8 parts of ethylphosphinic acid aluminium, 3-5 parts of 2-mercaptobenzimidazole.During actual test, being no more than, conducting wire is maximum allowable
By electric current, electric current is increased to 960A by normal current 500A, and operation occurs quenching failure for 1 year.
The difference of embodiment six and embodiment five are as follows: the conducting wire is hollow structure.
The conducting wire 53 is equipped with supporting mechanism.
The supporting mechanism 56 is triangular support body.
The triangular support body is triangular hollow support frame.
The conducting wire is connect with liquid helium refrigeration system, and the liquid helium refrigeration system outlet tube connects three-way connection, and three connect
First end is connect with liquid helium chamber, and the other end is connect with conducting wire, and conducting wire is equipped with liquid outlet, and it is intracavitary that liquid outlet is located at liquid helium.Through surveying
It tries properties and is better than embodiment five.
The difference of embodiment seven and embodiment six are as follows: the conducting wire is equipped with several through-holes being connected to hollow cavity
55.Properties are better than embodiment six after tested.
Above-mentioned apparatus is all made of non-magnetic material and is made.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (2)
1. the superconducting magnet apparatus in a kind of magnetic resonance imaging system, it is characterised in that: magnet inner cylinder and suit are on the inner cylinder
Outer cylinder, the inner cylinder are equipped with annulus, and the annulus is equipped with inside conductor groove, and the conducting wire of magnet is wrapped in interior lead
In line groove, set on the annulus there are two arc clamp, the clamp is upper equipped with matching with inside conductor groove
Wire grooves, the annulus is equipped with several and passes through the through-hole that inside conductor groove walls are connected to inside conductor groove, described
Annulus between inside conductor groove is equipped with several diversion grooves, and the arc clamp is equipped with several and passes through clamp
The upper deflector hole being connected to upper wire grooves, it is logical that the arc clamp is equipped with the upper water conservancy diversion that several are connected to diversion groove
Hole, the outer cylinder are equipped with the hold-down mechanism that compresses arc clamp, the hold-down mechanism include be evenly arranged on it is several on outer cylinder
A bolt being threadedly coupled therewith across outer cylinder, the arc clamp are equipped with positioning groove.
2. the superconducting magnet apparatus in magnetic resonance imaging system as described in claim 1, it is characterised in that: set on the bolt
There is a sealing mechanism, the sealing mechanism includes that be sleeved on longitudal section on bolt be trapezoidal external seal plug, the outer screw hole of the outer cylinder
Side is equipped with the tipper to match with sealing-plug, and the bolt is equipped with the outer nut for compressing sealing-plug.
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| 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 |
| 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 |
| 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 |
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 |
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