CN205880128U - Low temperature polymer electricity branch under electromagnetic field combined action causes device - Google Patents
Low temperature polymer electricity branch under electromagnetic field combined action causes device Download PDFInfo
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- CN205880128U CN205880128U CN201620643917.8U CN201620643917U CN205880128U CN 205880128 U CN205880128 U CN 205880128U CN 201620643917 U CN201620643917 U CN 201620643917U CN 205880128 U CN205880128 U CN 205880128U
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- Prior art keywords
- polymer
- low temperature
- magnetic field
- electric branch
- electromagnetic field
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- 229920000642 polymer Polymers 0.000 title claims abstract description 24
- 230000005672 electromagnetic field Effects 0.000 title claims abstract description 17
- 230000005611 electricity Effects 0.000 title abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000003384 imaging method Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 230000032683 aging Effects 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 239000004593 Epoxy Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000003822 epoxy resin Substances 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- 238000001467 acupuncture Methods 0.000 claims description 10
- 230000000977 initiatory effect Effects 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims 1
- 230000012010 growth Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006335 epoxy glue Polymers 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Magnetic Treatment Devices (AREA)
Abstract
The utility model relates to a superconducting magnet insulating reliability technique, for realizing the strong magnetic field environment in the simulation superconducting magnet system, electric branch is surveyd and the image acquisition function among the realization low temperature environment. Low temperature polymer electricity branch under electromagnetic field combined action causes device, including digital microscope imaging system, temperature control system, thermostated container, controllable high -voltage pulse power and magnetic field generating device, temperature control system passes through liquid nitrogen cooling device control thermostated container temperature, magnetic field generating device comprises with the electro -magnet constant current electricity magnetic field generator, and the electro -magnet adopts singly grips the U -shaped structure, the polymer is for carrying out the polymer sample that electric branch is ageing, is made by epoxy, and the polymer is in singly grips U -shaped structure intermediate position, is the needle passed through at both ends board electrode structure connects the outside controllable high -voltage pulse power of thermostated container, digit microscope imaging system surveys the electric branch growth condition in the epoxy sample in real time. The utility model discloses mainly be applied to the insulating occasion of superconducting magnet.
Description
Technical field
This utility model relates to superconducting magnet insulating reliability technology, and specifically, relate under electromagnetic field acts on jointly is low
Temperature electrostrictive polymer branch initiating device.
Background technology
At present, International Thermonuclear engineering causes to be paid close attention to widely, proposes magnetic confinement for this engineering in the world high
The leading concept of isothermal plasma, worldwide magnetic trapped fusion apparatus focuses on Tokamak type (Tokamak, EAST)
Circular magnetic confinement device on come.Temperature super-conducting magnet system is the important composition unit in Tokamak device, with epoxy resin
Composite insulator for matrix respectively constitutes turn-to-turn insulation in superconducting magnet system, layer insulation and magnet with ground insulation (over the ground
Insulation) insulated part.Epoxy glue undertakes in superconduction Tokamak device and connects and the effect of insulation.When superconducting magnet is run
Need to be operated under liquid helium temperature, need higher cryogenic mechanics performance and electrical property with epoxy resin for matrix insulant.
The epoxy glue that Britain's Rutherford experiment room is developed is introduced by China becomes the low temperature resistant insulant of superconducting magnet.At ITER device
In running, its internal superconducting insulation material is in the environment of high-intensity magnetic field, therefore, around superconducting coil and coil
Insulating composite material is in addition to the extreme environment bearing liquid nitrogen temperature, it is necessary to bear the effect of high-intensity magnetic field.At magnetic field and electric field
Common effect under, the kinestate of space charge can change, and then causes electric branch insulation ag(e)ing process to change.
Magnetic flux density is to characterize the important parameter that magnetic field is strong and weak, and in superconducting device, the change in magnetic flux density scope in magnetic field is that hundreds of mT is to several
T, the magnetic field under this intensity be enough to cause charge movement characteristic to change, and then it is special to cause electric branch to show different growths
Property.At present, the research of the electrostrictive polymer branch growing state being directed under magnetic field environment is less, not yet sets up the reality of complete set
Check system and method are observed electromagnetic field and are jointly acted on the impact on electric branch growth characteristics, are therefore badly in need of setting up a set of electromagnetic field
Electric branch test device under environment improves relevant theoretical system.
Summary of the invention
For overcoming the deficiencies in the prior art, it is low that the purpose of this utility model is under providing a kind of electromagnetic field jointly to act on
Temperature electrostrictive polymer branch initiating device, to simulate the strong magnetic field circumstance in superconducting magnet system, it is achieved asphalt mixtures modified by epoxy resin in low temperature environment
Fat sample electric branch under electromagnetic field acts on jointly is observed and image collecting function.The technical solution adopted in the utility model
Be, electromagnetic field jointly act under low temperature polymer electric branch initiating device, including digital microscope imaging system, temperature control
System, calorstat, the controllable high-voltage pulse power and field generator for magnetic, described temperature control system passes through liquid nitrogen chiller control
Calorstat temperature processed；Described field generator for magnetic is made up of with electric magnet Constant Electric Current magnetic field generator, and electric magnet uses and singly grips U-shaped
Structure, Horizontal water cooling；Described polymer is the polymer sample carrying out electrical tree aging process, is made up of epoxy resin, at polymer
In singly gripping U-shaped structure centre position, two ends connect the controllable high-voltage pulse power outside calorstat by needle to board electrode structure；
Electric branch growing state in digital microscope imaging system real-time monitored epoxy specimens.
Needle to board electrode structure is chosen high-purity acupuncture needle and is connected as high-field electrode with the controllable high-voltage pulse power, and thickness is
The aluminium foil of 100 μm is attached to bottom sample and compresses with aluminium sheet, and aluminium sheet is connected, as ground electrode with ground.
High-purity acupuncture needle is solid acupuncture needle, its a diameter of 400 μm, and needle point radius of curvature is 3 μm.
Feature of the present utility model and providing the benefit that:
Advantage of the present utility model and providing the benefit that, can simulate insulator institute in superconducting magnet system by this device
The superconduction low temperature at place and magnetic field environment, observe the change in magnetic field to epoxy by controlling field generator for magnetic change magnetic field intensity
The impact of interior insulator electrical tree aging process, has grasped the electrostrictive polymer branch growth characteristics under cryogenic magnetic field environment further,
Insulating reliability in superconduction is assessed tool be of great significance.
Accompanying drawing illustrates:
Fig. 1 is the electric branch experiment porch under cryogenic magnetic field environment；
Fig. 2 is pulse voltage waveform figure；
Fig. 3 is typical electric branch form under different magnetic field；
Fig. 4 is electric branch initial probability and the relation of magnetic flux density under low temperature.
Detailed description of the invention
This utility model relate to the low temperature polymer electric branch initiating device under a kind of electromagnetic field acts on jointly, utilizes number
Word microscopy imaging system, temperature control system, the controllable high-voltage pulse power and field generator for magnetic are strong by changing magnetic field
Degree, under research low temperature, electromagnetic field acts on the impact on epoxy resin electric branch growth characteristics jointly, and to measurement data number
Process, and analyzes epoxy resin electric branch form, the isoparametric change of the speed of growth, grasps epoxy resin and jointly makees at electromagnetic field
Electric branch growth mechanism under with, the insulating reliability for research superconducting magnet system provides important theoretical foundation, has
Characteristic is instructed in typical engineering practice.
The technical solution of the utility model is, electromagnetic field jointly act under low temperature polymer electric branch initiating device, bag
Include digital microscope imaging system, temperature control system, the controllable high-voltage pulse power and field generator for magnetic, it is characterized by: institute
Stating temperature control system makes Range of measuring temp be that room temperature is to liquid nitrogen temperature by liquid nitrogen chiller；Described field generator for magnetic
Being made up of with electric magnet Constant Electric Current magnetic field generator, electric magnet uses and singly grips U-shaped structure, Horizontal water cooling, has broad view, knot
The features such as structure is reliable, magnetic field intensity is high, magnetic field intensity is adjustable；The described polymer sample of electrical tree aging process that carries out is by epoxy resin
Make, experiment select needle to board electrode structure, use solid acupuncture needle as needle electrode, its a diameter of 400 μm, needle point radius of curvature
Being 3 μm, to eliminate the magnetic field stress effect to needle electrode, this device can realize the low temperature polymer electricity under electromagnetic field acts on jointly
Branch is observed.
In needle to board electrode, choosing high-purity acupuncture needle and connect as high-field electrode with ac high voltage source, thickness is 100 μ
The aluminium foil of m is attached to bottom sample and compresses with aluminium sheet, and aluminium sheet is connected, as ground electrode with ground.
Transformator high and low pressure insulated sleeve is the primary insulation device outside transformer tank, drawing of transformator high and low pressure winding
Outlet has to pass through insulated sleeve, makes to insulate between lead-out wire and between lead-out wire and transformer case, plays fixing extraction simultaneously
The effect of line.
CCD digital camera head is connected with notebook computer, and carrying software by photographic head can be with real-time monitored epoxy resin
Electric branch growing state in sample, and can image, take pictures, take pictures and can realize regularly taking pictures.Software also can realize length
Demarcate, the electric branch photographed growth picture is compareed with microscope scale, electric branch growth length can be demarcated.
This utility model is further described below in conjunction with the accompanying drawings with instantiation.
This utility model uses the magnetic field environment experimental system property the entered electrical tree aging process shown in Fig. 1 to study.The reality of this research
Testing temperature is 30 ,-30 ,-90 and-196 DEG C.Experiment uses typical needle to board electrode, chooses high-purity acupuncture needle as pin electricity simultaneously
Pole is to eliminate magnetic field stress, a diameter of 400 μm of acupuncture needle, needle point radius of curvature 3 μm.Magnetic field environment is produced by electromagnetic generator,
Magnetic flux density scope is 0-400mT.The voltage that applied of experiment is the pulse voltage that impulse voltage generator produces, its amplitude and
Frequency is respectively 14kV and 400Hz.Pulse voltage waveform is as shown in Figure 2.The error brought in order to avoid experiment randomness, every kind
Situation about carries out 20 times repeating experiment.
Fig. 3 is typical electric branch form under varying strength magnetic field, the test of epoxy resin electric branch respectively 0,100,
200, carry out under the magnetic flux density of 400mT.Under without magnetic field condition, the form of electric branch is simple, and branch is few, and branch passage is fine
Carefully.And when, behind the magnetic field executing outward some strength, the obvious overstriking of passage of electric branch, branch branch increases, and the tree of electric branch
Branch passage is interlaced, is filled with each direction of growth around needle point, and the cross growth of electric branch is obvious.Magnetic field intensity
Increasing, branch passage is thicker and cross growth phenomenon becomes apparent from, and the form of electric branch is increasingly complex.
Fig. 4 be under low temperature environment electric branch initial probability with the variation tendency of magnetic flux density.Initial time is set to 10min.
Along with the increase of magnetic flux density, initial probability also presents the trend of constantly rising.But when magnetic flux density is relatively low (0-
200mT), the increase of electric branch initial probability is the most inconspicuous, when magnetic flux density increases to certain value (for 400mT in this experiment),
The initial probability of electric branch has significantly increase.Such as when-30 DEG C, when magnetic flux density is 0-200mT, electric branch is initial general
Rate, between 20-25%, increases and inconspicuous, and when magnetic flux density increases to 400mT, it is left that initial probability increases to 50%
The right side, is 2 times more than of low magnetic flux density.
Claims (3)
1. the low temperature polymer electric branch initiating device under electromagnetic field acts on jointly, is characterized in that, digital microscope become
As system, temperature control system, calorstat, the controllable high-voltage pulse power and field generator for magnetic are constituted, described temperature controls system
Unite and control calorstat temperature by liquid nitrogen chiller；Described field generator for magnetic is by Constant Electric Current magnetic field generator and electromagnet group
Becoming, electric magnet uses and singly grips U-shaped structure, Horizontal water cooling；Described polymer is the polymer sample carrying out electrical tree aging process, by ring
Epoxy resins is made, and polymer is in singly grips U-shaped structure centre position, and two ends are connected outside calorstat by needle to board electrode structure
The controllable high-voltage pulse power；Electric branch growing state in digital microscope imaging system real-time monitored epoxy specimens.
2. the low temperature polymer electric branch initiating device under electromagnetic field as claimed in claim 1 acts on jointly, is characterized in that,
Needle to board electrode structure is chosen high-purity acupuncture needle and is connected as high-field electrode with the controllable high-voltage pulse power, and thickness is the aluminum of 100 μm
Paper tinsel is attached to bottom sample and compresses with aluminium sheet, and aluminium sheet is connected, as ground electrode with ground.
3. the low temperature polymer electric branch initiating device under electromagnetic field as claimed in claim 2 acts on jointly, is characterized in that, high
Purity acupuncture needle is solid acupuncture needle, its a diameter of 400 μm, and needle point radius of curvature is 3 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620643917.8U CN205880128U (en) | 2016-06-21 | 2016-06-21 | Low temperature polymer electricity branch under electromagnetic field combined action causes device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620643917.8U CN205880128U (en) | 2016-06-21 | 2016-06-21 | Low temperature polymer electricity branch under electromagnetic field combined action causes device |
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| Publication Number | Publication Date |
|---|---|
| CN205880128U true CN205880128U (en) | 2017-01-11 |
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| CN201620643917.8U Expired - Fee Related CN205880128U (en) | 2016-06-21 | 2016-06-21 | Low temperature polymer electricity branch under electromagnetic field combined action causes device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199348A (en) * | 2016-06-21 | 2016-12-07 | 天津大学 | Electromagnetic field jointly act under low temperature polymer electric branch initiating method and device |
| CN107064754A (en) * | 2017-03-28 | 2017-08-18 | 国网上海市电力公司 | A kind of variable pulse voltage triggers the device of epoxy resin insulation material electric branch |
| CN109521337A (en) * | 2018-11-24 | 2019-03-26 | 天津大学 | A kind of electrostrictive polymer branch characteristic measuring device and method based on ultrasonic method |
| CN110095700A (en) * | 2018-01-27 | 2019-08-06 | 天津大学 | A kind of superconducting insulation material aging assessment device based on compound field |
| CN111830370A (en) * | 2020-01-10 | 2020-10-27 | 天津大学 | Insulation aging experimental device based on temperature gradient and composite voltage |
-
2016
- 2016-06-21 CN CN201620643917.8U patent/CN205880128U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199348A (en) * | 2016-06-21 | 2016-12-07 | 天津大学 | Electromagnetic field jointly act under low temperature polymer electric branch initiating method and device |
| CN107064754A (en) * | 2017-03-28 | 2017-08-18 | 国网上海市电力公司 | A kind of variable pulse voltage triggers the device of epoxy resin insulation material electric branch |
| CN110095700A (en) * | 2018-01-27 | 2019-08-06 | 天津大学 | A kind of superconducting insulation material aging assessment device based on compound field |
| CN109521337A (en) * | 2018-11-24 | 2019-03-26 | 天津大学 | A kind of electrostrictive polymer branch characteristic measuring device and method based on ultrasonic method |
| CN111830370A (en) * | 2020-01-10 | 2020-10-27 | 天津大学 | Insulation aging experimental device based on temperature gradient and composite voltage |
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| 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: 20170111 |