CN109655725A - The quickly device and method of detection solid insulating layer Paschen performance at low pressure - Google Patents
The quickly device and method of detection solid insulating layer Paschen performance at low pressure Download PDFInfo
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- CN109655725A CN109655725A CN201910007220.XA CN201910007220A CN109655725A CN 109655725 A CN109655725 A CN 109655725A CN 201910007220 A CN201910007220 A CN 201910007220A CN 109655725 A CN109655725 A CN 109655725A
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- vacuum
- insulating layer
- electrical shielding
- bag film
- paschen
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- 239000007787 solid Substances 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 8
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of device and methods of quickly detection solid insulating layer Paschen performance at low pressure, device includes the electrical shielding net for being paperwrapped in solid insulating layer outer surface on conductor, electrical shielding net side is connected with conducting wire, electrical shielding net surface is surrounded with airfelt, electrical shielding net and airfelt seal closure are in vacuum bag film, vacuum pumping port and vacuum degree measurement mouth are offered in vacuum bag film, vacuum pumping port piping connection vacuum pump, vacuum degree measurement mouth piping connection vacuum measuring cell, high voltage direct current generator is connected between conductor and conducting wire, the high pressure of high voltage direct current generator terminates conductor, low-pressure end connecting wire；Method includes being inserted in vacuum bag film.Operation of the present invention is simple, and the testing time is short quickly, and limitation is small, can be used for testing the insulating element of various shape and volume.
Description
Technical field
The present invention relates to a kind of performance test methods of insulating materials, and in particular to quickly detection solid insulating layer exists one kind
The device and method of Paschen performance under low pressure.
Background technique
Paschen's law describes the nonlinear function between gas breakdown voltage and two electrode spacings and air pressure.Pa
Xing's electric discharge phenomena are a kind of gas discharge property, have close relationship with the physical characteristic of gas itself, while when electric discharge electricity
The variation of interpolar position also has direct influence to discharge characteristics.After electrode position is fixed, gas atmosphere reaches a certain spy
Determine in range, only needs extremely low voltage that electric discharge phenomena will occur.Under room temperature environment, helium in 150V, 3.3Pa-m (air pressure with
Electrode distance product) Paschen electric discharge will occur.
All tokamak superconducting magnets and its feeder system must could operate normally under low temperature and vacuum environment.
High potential component voltage-to-ground under operating condition in magnet is only tens to hectovolt magnitude, but Plasma disruption once occurs
Or situations such as magnet quenching, the burnt energy of number million need to release in short-term, the voltage-to-ground of whole system will rise to rapidly ten thousand volts
Magnitude.Paschen electric discharge occurs between high potential component and zero potential component in order to prevent, is in magnet, cooling and the survey of high potential
The conductors such as buret line must all use solid insulating layer to carry out high low potential isolation, theoretically cut off discharge path in this way.
But due to the electromagnetic force load and thermal stress of magnet system operation, after the operation of insulating materials through a long time low temperature environment all
The physical damnifications such as cracking, aging may be generated, and insulating materials manufacturing process itself is also likely to be present some inherent shortcomings,
The accumulation of these unfavorable factors can all discharge for Paschen provides necessary discharge path.If when insulation defect has generated, together
When again occur to a certain degree vacuum leak or pipeline helium leakage, be just easy at this time occur Paschen discharge accident.
Therefore all insulating materials must be strictly controlled quality, be carried out using certain measure simulation Paschen discharge environment resistance to
Performance test is pressed, is used on component after qualified.
Notification number is the patent of invention of 101995538 B of CN, is disclosed a kind of for fixing insulating materials under the conditions of Paschen
DC break down voltage performance test sample, including insulation supporting tube, insulating layer to be tested overlay on outside insulation supporting tube, and connector sleeve pipe sleeve exists
Be cased with flange connector outside insulating layer to be tested, outside connecting sleeve, between connecting sleeve and insulation supporting tube curved pipe bottom to
There is metal tape outside test insulating layer, the cutting ferrule of tightening is cased with outside metal tape, cutting ferrule lower end passes through spring electrical ground.It can be
Low-temperature and low-pressure environmental testing has high voltage feed-in convenient, and electrode arrangement is simple, and the uniform advantage of field distribution has simultaneously
Effect solves influence of the sample surface leakage stream to test result.But it, which exists, operates constant, manufacture and testing cost height, surveys
Try the defect that the time is long and limitation is big.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, provide that a kind of structure is simple, manufacturing cost is low, makes
With the device and method of the good quick detection solid insulating layer of convenient and efficient and detection effect Paschen performance at low pressure.
A kind of device of quick detection solid insulating layer Paschen performance at low pressure, including to be paperwrapped in solid on conductor exhausted
The electrical shielding net of edge layer outer surface, electrical shielding net side are connected with conducting wire, and electrical shielding net surface is surrounded with airfelt, electrical shielding net
And airfelt seal closure offers vacuum pumping port and vacuum degree measurement mouth, vacuum pumping port pipe in vacuum bag film, in vacuum bag film
Road connects vacuum pump, and vacuum degree measurement mouth piping connection vacuum measuring cell is connected with high direct voltage between conductor and conducting wire
The high pressure of generator, high voltage direct current generator terminates conductor, low-pressure end connecting wire.
It is further described as to above-mentioned technical proposal:
The vacuum bag film internal layer is equipped with bag film inner frame.
It is further described as to above-mentioned technical proposal:
The quantity of the vacuum pumping port is more than one.
A kind of method of quick detection solid insulating layer Paschen performance at low pressure, comprising the following steps:
(1), solid insulating layer outer surface winds one layer of electrical shielding net on conductor, if in the insulation system of conductor having included electric screen
Layer is covered, can not be wound；
(2), that conducting wire is connected to electrical shielding is online；
(3), in electrical shielding net outer wrap airfelt；
(4), by electrical shielding net and airfelt seal closure in vacuum bag film；
(5), vacuum pump is connected at the vacuum pumping port in vacuum bag film, vacuum measuring cell is connected in vacuum bag film
Vacuum degree measurement mouth at；
(6), the high pressure of high voltage direct current generator is terminated on conductor, low pressure terminates on conducting wire；
(7), after being connected, confirmation vacuum bag film after each junction is intact, starts vacuum pump, to vacuum without breakage
When spending vacuum degree shown on measuring cell and arriving designated value, high voltage direct current generator progress Paschen test is used.
Operation of the present invention method is simple and fast, and relative to traditional Paschen test method, it is high both to avoid processing cost
Vacuum chamber, also substantially reduce the testing time, therefore there is very high economy and practicability.And due to its user
Just, limitation is small, and when encountering insulating layer has Paschen defect, diagnosis is also very convenient and efficient, can be used for various shape and body
Long-pending insulating element is tested.
It on the other hand, can be by the way that multiple small size vacuum bag films be arranged on the insulating layer, one by one to multiple small size vacuum bag films
It is tested, if not getting off or occurring Paschen electric discharge there is a situation where vacuum degree drops at some vacuum bag film, can be determined
Defective locations are in this section, therefore it is contemplated that the present invention may be use with lookup insulation defect position, provides foundation to solve defect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of electrical shielding net wrapping in the present invention；
Fig. 2 is that vacuum bag film seals the structural schematic diagram being provide in the present invention；
Fig. 3 is the use state diagram of the present invention when detecting.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Referring to Fig. 3, a kind of device of quickly detection solid insulating layer provided by the invention Paschen performance at low pressure, packet
The electrical shielding net 3 for being paperwrapped in 2 outer surface of solid insulating layer on conductor 1 is included, 3 side of electrical shielding net is connected with conducting wire 4, electrical shielding net
1 surface is surrounded with airfelt 5, and electrical shielding net 1 and 5 seal closure of airfelt offer true in vacuum bag film 6 in vacuum bag film 6
Empty pump mouth 7 and vacuum degree measurement mouth 8,7 piping connection vacuum pump 9 of vacuum pumping port, 8 piping connection vacuum degree of vacuum degree measurement mouth are surveyed
Element 10 is measured, high voltage direct current generator 11 is connected between conductor 1 and conducting wire 4, the high pressure termination of high voltage direct current generator 11 is led
Body 1, low-pressure end connecting wire 4.
A kind of method of quick detection solid insulating layer Paschen performance at low pressure, as shown in Figure 1 to Figure 3, wherein Fig. 1
Shown in be the region for needing to carry out solid insulating layer Paschen performance test in dotted line frame region；
It the described method comprises the following steps:
(1), 2 outer surface of solid insulating layer winds one layer of electrical shielding net 3 on conductor 1, if having included in the insulation system of conductor 1
Shield layer can not be wound；
(2), conducting wire 4 is connected on electrical shielding net 3；
(3), in 3 outer wrap airfelt 5 of electrical shielding net；
(4), by electrical shielding net 1 and 5 seal closure of airfelt in vacuum bag film 6, the size of vacuum bag film 6 is according to solid insulating layer
The shapes and sizes of 2 test zones are accordingly cut；
(5), vacuum pump 9 is connected at the vacuum pumping port 7 in vacuum bag film 6, by vacuum measuring cell 10(for example including phase
The vacuum gauge 101 and vacuum meter 102 connect) it is connected to by hose at the vacuum degree measurement mouth 8 in vacuum bag film 6, use sealing
Glue seals vacuum bag film 6, it is made to ensure to close；
(6), the high pressure of high voltage direct current generator 11 is terminated on conductor 1, low pressure terminates on conducting wire 4；
(7), after being connected, confirmation vacuum bag film 6 after each junction is intact, starts vacuum pump 9, to true without breakage
Shown vacuum degree is to designated value (10 on reciprocal of duty cycle measuring cell 102~105When Pa), carried out using high voltage direct current generator 11
Paschen test.
Embodiment 1
It is further described as to above-mentioned technical proposal, in the present embodiment, 6 internal layer of vacuum bag film is equipped with bag film inner frame
12.Purpose is, prevents deformation of the vacuum bag film 6 in installation and measurement, it is ensured that the accuracy of detection.
Embodiment 2
It is further described as to above-mentioned technical proposal, in the present embodiment, the quantity of vacuum pumping port 7 is more than one.Purpose
It is, the speed vacuumized can be accelerated according to test request.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of device of quickly detection solid insulating layer Paschen performance at low pressure, it is characterised in that: led including being paperwrapped in
The electrical shielding net of solid insulating layer outer surface on body, electrical shielding net side are connected with conducting wire, and electrical shielding net surface is surrounded with ventilative
Felt, electrical shielding net and airfelt seal closure offer vacuum pumping port and vacuum degree measurement mouth in vacuum bag film, in vacuum bag film,
Vacuum pumping port piping connection vacuum pump, vacuum degree measurement mouth piping connection vacuum measuring cell, connects between conductor and conducting wire
There is high voltage direct current generator, the high pressure of high voltage direct current generator terminates conductor, low-pressure end connecting wire.
2. the device of quick detection solid insulating layer according to claim 1 Paschen performance at low pressure, feature exist
In: the vacuum bag film internal layer is equipped with bag film inner frame.
3. the device of quick detection solid insulating layer according to claim 1 Paschen performance at low pressure, feature exist
In: the quantity of the vacuum pumping port is more than one.
4. a kind of method of quickly detection solid insulating layer Paschen performance at low pressure, using in such as claims 1 to 3 arbitrarily
The device of the Paschen performance at low pressure of quick detection solid insulating layer described in one is operated, it is characterised in that: including
Following steps:
(1), solid insulating layer outer surface winds one layer of electrical shielding net on conductor, if in the insulation system of conductor having included electric screen
Layer is covered, can not be wound；
(2), that conducting wire is connected to electrical shielding is online；
(3), in electrical shielding net outer wrap airfelt；
(4), by electrical shielding net and airfelt seal closure in vacuum bag film；
(5), vacuum pump is connected at the vacuum pumping port in vacuum bag film, vacuum measuring cell is connected in vacuum bag film
Vacuum degree measurement mouth at；
(6), the high pressure of high voltage direct current generator is terminated on conductor, low pressure terminates on conducting wire；
(7), after being connected, confirmation vacuum bag film after each junction is intact, starts vacuum pump, to vacuum without breakage
When spending vacuum degree shown on measuring cell and arriving designated value, high voltage direct current generator progress Paschen test is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910007220.XA CN109655725A (en) | 2019-01-04 | 2019-01-04 | The quickly device and method of detection solid insulating layer Paschen performance at low pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910007220.XA CN109655725A (en) | 2019-01-04 | 2019-01-04 | The quickly device and method of detection solid insulating layer Paschen performance at low pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325278A (en) * | 2021-05-25 | 2021-08-31 | 长春捷翼汽车零部件有限公司 | Insulation and voltage resistance detection method and detection equipment for wire harness and automobile wire harness assembly line |
| CN114062876A (en) * | 2021-11-19 | 2022-02-18 | 中国科学院合肥物质科学研究院 | Test device and test method capable of directly observing Paschen discharge phenomenon of insulating substance |
| CN114062986A (en) * | 2021-11-17 | 2022-02-18 | 中国科学院合肥物质科学研究院 | Low-temperature superconducting insulation local Paschen test device capable of being observed in real time |
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| JPH01307145A (en) * | 1988-06-06 | 1989-12-12 | Agency Of Ind Science & Technol | Ion source |
| CN101995538A (en) * | 2010-10-14 | 2011-03-30 | 中国科学院等离子体物理研究所 | Test specimen for direct-current voltage-resistance performance test of fixed insulation materials under Paschen condition |
| CN102012476A (en) * | 2010-07-27 | 2011-04-13 | 中国科学院等离子体物理研究所 | Low-temperature superconductive insulating paschen discharge tester |
| CN102253319A (en) * | 2011-05-04 | 2011-11-23 | 中国科学院等离子体物理研究所 | Solid insulation voltage resistance performance test system under high voltage and low temperature Paschen condition |
| CN102426324A (en) * | 2011-08-24 | 2012-04-25 | 中国科学院等离子体物理研究所 | Tester for testing insulation low-temperature performance of superconducting electrical component |
| CN104934136A (en) * | 2015-04-27 | 2015-09-23 | 中国科学院等离子体物理研究所 | Processing technology of insulated ground shielding layer of CICC super-conducting bus |
-
2019
- 2019-01-04 CN CN201910007220.XA patent/CN109655725A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01307145A (en) * | 1988-06-06 | 1989-12-12 | Agency Of Ind Science & Technol | Ion source |
| CN102012476A (en) * | 2010-07-27 | 2011-04-13 | 中国科学院等离子体物理研究所 | Low-temperature superconductive insulating paschen discharge tester |
| CN101995538A (en) * | 2010-10-14 | 2011-03-30 | 中国科学院等离子体物理研究所 | Test specimen for direct-current voltage-resistance performance test of fixed insulation materials under Paschen condition |
| CN102253319A (en) * | 2011-05-04 | 2011-11-23 | 中国科学院等离子体物理研究所 | Solid insulation voltage resistance performance test system under high voltage and low temperature Paschen condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325278A (en) * | 2021-05-25 | 2021-08-31 | 长春捷翼汽车零部件有限公司 | Insulation and voltage resistance detection method and detection equipment for wire harness and automobile wire harness assembly line |
| CN114062986A (en) * | 2021-11-17 | 2022-02-18 | 中国科学院合肥物质科学研究院 | Low-temperature superconducting insulation local Paschen test device capable of being observed in real time |
| CN114062876A (en) * | 2021-11-19 | 2022-02-18 | 中国科学院合肥物质科学研究院 | Test device and test method capable of directly observing Paschen discharge phenomenon of insulating substance |
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Application publication date: 20190419 |