CN109613411A - A kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample - Google Patents
A kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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
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Abstract
The invention discloses a kind of preparation methods of external insulation anti-pollution flashover coating electrical insulation properties test sample, belong to the preparation technical field of external insulation anti-pollution flashover coating electrical insulation properties test sample.Include the following steps: that (1) is poured；(2) multistage rises negative pressure and bubble is discharged: casting mold being put into vacuum glove box, reduces pressure in vacuum glove box, until coating surface has bubble discharge, there is no continuous air bubbles discharges up to coating surface for standing；Continue to increase negative pressure, until coating surface has bubble discharge, there is no continuous air bubbles discharges up to coating surface for standing；Until coating surface is smooth and bubble-free, standing are volatilized completely up to solvent；(3) dry: the sample to be dried that step (2) is obtained after 90-120 DEG C of baking 48h or more to take out.The present invention is able to solve the coating that casting obtains and is easy to appear uneven thickness and the problem of a large amount of bubbles occur, obtains thickness uniformly and the sample to be tested of bubble-free.
Description
Technical field
The present invention relates to the preparation technical fields of external insulation anti-pollution flashover coating electrical insulation properties test sample, and in particular to
A kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample.
Background technique
External insulation anti-pollution flashover coating is because having preferable hydrophobicity, migration of hydrophobicity, electric insulating quality and can site operation
The advantages that in-place molding, is widely applied in China's project of transmitting and converting electricity, but with the raising of voltage class and part heavy industry
Reasons, the external insulation anti-pollution flashover coatings such as industry area air environmental pollution is serious constantly research and develop upgrading.
Newly developed external insulation anti-pollution flashover coating needs to carry out electrical insulation properties test to detect its electric insulating quality
Can, according to standard " DLT 627-2012 Prospect on RTV of Solidified Silicon Rubber in Normal Temperature for Insulator ", " GB/T 1408.1-2016 is exhausted
Tested under edge material electrical strength test method part 1 power frequency ", " GB/T 1410-2006 material volume resistivity and surface
Resistivity test method ", " GB/T 1409-2006 measures electrical insulating material in power frequency, audio, high frequency (including metric wave wavelength
In depositing) under capacitivity and dielectric dissipation factor recommended method ", " electricity used under GB/T 6553-2014 harsh environmental conditions
The test method they edge material ratings of drawing last breath resistance to electric traceization and deteriorated ", it is desirable that the external insulation for carrying out electrical insulation properties test is antifouling
Dodge coating sample want coating is smooth, smooth, thickness uniformly, bubble-free, do not accumulate, not defect, do not trickle, not wire drawing.
In the prior art, casting is mostly used to prepare sample.But because casting is uneven in casting process, it is easy to appear painting
The problem of layer uneven thickness, and bubble the problem of cannot sufficiently overflowing, coating is caused to be easy to appear a large amount of bubbles when being poured.
So the above-mentioned prior art be not able to satisfy external insulation anti-pollution flashover coating electrical insulation properties test sample uniform coating thickness and
The requirement of bubble-free.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, proposes a kind of external insulation anti-pollution flashover coating electrical insulation properties
The preparation method of test sample, the present invention are able to solve the coating that casting obtains and are easy to appear uneven thickness and a large amount of gas occur
The problem of bubble, obtains thickness uniformly and the sample of bubble-free；And sample humidity is reduced to electrical insulation properties test result
Influence, improve external insulation anti-pollution flashover coating to be detected electrical insulation properties test in accuracy, for it is to be detected it is outer absolutely
Edge anti-pollution flashover coating provides accurate electrical insulation properties data.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample, includes the following steps:
(1) it is poured: external insulation anti-pollution flashover coating to be detected being cast on mold using Multi-channel liquid transfer device, it is then quiet
It sets, obtains casting mold；
(2) multistage rises negative pressure and bubble is discharged:
A: the casting mold that step (1) obtains is put into vacuum glove box, reduces pressure in vacuum glove box, until coating
There is bubble discharge on surface, keeps the constant standing of negative pressure, there is no continuous air bubbles discharges up to coating surface；
B: continuing to increase negative pressure, until coating surface has bubble discharge, keeps the constant standing of negative pressure, until coating surface is not
There is continuous air bubbles discharge again；
C: repeating step B, until coating surface is smooth and bubble-free, keeps the constant standing of negative pressure, until solvent is waved completely
Hair, obtains sample to be dried；
(3) it dries: the sample to be dried that step (2) obtains being put into baking oven, with 90-120 DEG C of baking 48h or 48h or more
After take out, obtain sample to be tested.
Further, step (1) time of repose is 30-60min.
Further, step (2) the A time of repose is 60-120min.
Further, it is 0.05-0.2MPa, time of repose 60-120min that negative pressure is increased in step (2) B.
Further, time of repose is 720min or 720min or more in step (2) C.
Further, the sample to be tested that the step (3) obtains needs to carry out electricity within 30min after taking out baking oven
Gas dielectric test.
Further, the time exposed in air after taking out baking oven when the sample to be tested that the step (3) obtains
Greater than, needing to re-start step (3) before carrying out electrical insulation properties test for 24 hours.
Further, the electrical insulation properties test includes electrical breakdown strength test, volume resistivity test, surface
Resistivity test, resistance to electric trace and the test of galvanic corrosion damage, relative dielectric constant test, the test of dielectric loss tangent value and corona test.
Further, the external insulation anti-pollution flashover coating to be detected includes the component of following mass ratio: Nano-meter SiO_22Particle:
Mixed solvent: FEVE resin: defoaming agent: curing agent 0.05-0.1:1:1:0.005:0.1, mixed solvent be ethyl acetate and
The mass ratio of the mixture of butyl acetate, in the mixed solvent ethyl acetate and butyl acetate is 3:4.
Further, the preparation method of the external insulation anti-pollution flashover coating to be detected, includes the following steps:
(1) by Nano-meter SiO_22In the mixed solvent is added in particle, stirs 15-20min, speed of agitator 6000-8000r/
Then min stirs 8-12min with the ultrasonic wave of 45-55Hz, obtains mixed solution；
(2) FEVE resin is added in the mixed solution that step (1) obtains, stirs 60-90min, obtains preliminary coating；
(3) defoaming agent and curing agent are added in the preliminary coating that step (2) obtains, obtains external insulation antifouling work to be detected
Coating.
The invention has the benefit that
1, of the invention by the way that external insulation anti-pollution flashover coating to be detected is poured into mold using Multi-channel liquid transfer device, because
Multi-channel liquid transfer device has multichannel, significantly reduces liquid relief number, improves work efficiency, and can make to be detected outer exhausted
Edge anti-pollution flashover coating is more uniformly poured into mold, avoid the uneven bring uneven thickness of casting in the prior art and
Surface wire drawing phenomenon；
By the stage rise negative pressure be discharged bubble, the blibbing of sample can be effectively discharged out, avoid disposably plus
Negative pressure is too low so that bubble can not be discharged, and the negative pressure disposably added is excessively high so that solvent volatilization is too fast to bring specimen surface not
Smooth problem.
So the present invention is able to solve the coating that casting obtains and is easy to appear uneven thickness and asking for a large amount of bubbles occur
Topic obtains thickness uniformly and the sample to be dried of bubble-free.
In addition, the sample to be dried for rising negative pressure discharge bubble by the multistage is dried, examination to be dried can reduce
The humidity of sample eliminates the moisture film that specimen surface to be dried is formed due to excessively moist, and sample to be dried is avoided directly to carry out
Electrical insulation properties test, such as when carrying out relative dielectric constant test, the test of dielectric loss tangent value, by specimen surface to be dried
Moisture film influence sample dielectric constant and dielectric loss angle tangent.Therefore humidity can be substantially reduced to electricity by baking step
It draws last breath the influences of edge performance test results.
To sum up, it is improved by the sample that casting, multistage liter negative pressure discharge bubble and baking step are prepared to be detected
Accuracy of the external insulation anti-pollution flashover coating in electrical insulation properties test, provides essence for external insulation anti-pollution flashover coating to be detected
True electrical insulation properties data.
2, it is preferably 30-60min by time of repose after allowing step (1) to be poured, can be avoided because of time of repose after casting
Too short, leading to prepare the bubble generated during external insulation anti-pollution flashover coating to be detected cannot be sufficiently discharged, it will after increase
The difficulty of bubble is discharged in continuous step, reduces the working efficiency of subsequent step, coating surface is made to retain bubble, reduces test accuracy
The problem of；Also it avoids because time of repose is too long after casting, the problem of causing working efficiency to reduce.
3, by allowing the time of repose of step (2) A and step (2) B to be 60-120min.It can be avoided because time of repose is low
When 60min, the bubble generated in solvent volatilization process is caused not to be completely exhausted out, reduces experimental accuracy；Between upon standing
When higher than 120min, although bubble is sufficiently discharged, the test time used is extended, test efficiency is reduced；It is logical
It crosses and raising negative pressure in step (2) B is allowed to be 0.05-0.2MPa, can be avoided because each raised negative pressure is too low, and increase to increase and bear
The number of pressure reduces test efficiency, also avoids because each raised negative pressure is excessively high, and reduces bubble from sufficiently shedding
Test accuracy.
4,720min is equal to or more than by the time for allowing step (2) C that negative pressure is kept to stand, solvent can be allowed to have outstanding
Volatilization effect, can be avoided when lower than 720min, the problem of caused solvent volatilization effect difference.
5, electric insulating quality is carried out after taking out baking oven within 30min by the sample to be tested for obtaining step (3)
It can test, can make sample to be tested after taking out baking oven, before carrying out insulation performance, avoid sample to be tested in air
Exposed overlong time reduces the vapour quantity from surrounding air that sample to be tested absorbs to greatest extent, thereby reduces
The influence that humidity tests electrical insulation properties, improves test accuracy.
6, it by the way that the operation for re-starting step (3) more than sample to be tested for 24 hours in air will be exposed, can eliminate
Sample to be tested because in air to overlong time and the moisture film that generates.This is because being tested in electrical insulation properties
It is found in journey, if sample to be tested is placed in air for a long time, the moisture in air can change the wet of sample to be tested itself
Degree makes its surface form moisture film, and then influences electrical insulation properties test result, and therefore, it is necessary to will expose to be more than in air
Sample to be tested for 24 hours is dried again.
7, external insulation anti-pollution flashover coating to be detected is carrying out electrical breakdown strength test, volume resistivity test, surface electricity
When the test of resistance rate, resistance to electric trace and the test of galvanic corrosion damage, relative dielectric constant test, the test of dielectric loss tangent value or corona test,
Can sample preparation step according to the invention carry out the production of sample to be tested, preparation method of sample application test of the invention
Extensively, practical.
8, because containing Nano-meter SiO_2 in external insulation anti-pollution flashover coating to be detected provided by the invention2Particle and FEVE resin,
And FEVE resin has the excellent performance for capableing of normal temperature cure, Nano-meter SiO_22Particle has anti-ultraviolet property, so this hair
The external insulation anti-pollution flashover coating of bright offer has outstanding automatically cleaning, anti-aging, resistance to soiling and chemical-resistance.
9, the preparation method of external insulation anti-pollution flashover coating to be detected provided by the invention passes through stirring in step (1) twice
It mixes, can be improved Nano-meter SiO_22Particle can be improved FEVE resin by the stirring of step (2) in the uniformity of mixed solvent
The uniformity in mixed solution；By the way that defoaming agent is added in step (3), external insulation anti-pollution flashover coating can be reduced and prepared
The bubble generated in the process.The preparation method operating process of external insulation anti-pollution flashover coating to be detected provided by the invention is simple, subtracts
Fault produced during the preparation process is lacked.
Specific embodiment
For a better understanding of the present invention, below with reference to embodiment, the present invention will be further elaborated.
Embodiment 1:
The circle that the electrical breakdown strength test all plates of pilot scale are diameter 100mm, coating thickness requirement 3mm, so needing
The volume for wanting external insulation anti-pollution flashover coating to be detected is 23.56cm3.External insulation to be detected is configured on the basis of 100gFEVE resin
The step of anti-pollution flashover coating, is as follows:
Prepare external insulation anti-pollution flashover coating to be detected:
(1) by 5g Nano-meter SiO_22Particle is added to the in the mixed solvent of 57g ethyl acetate and 43g butyl acetate, then stirs
15min, speed of agitator 7000r/min are mixed, 10min is then stirred with the ultrasonic wave of 50Hz, obtains mixed solution；
(2) 100gFEVE resin is added in the mixed solution that step (1) obtains, stirs 60min, obtains preliminary coating；
(3) 0.5g defoaming agent and 10g curing agent are added in the preliminary coating that step (2) obtains, obtains to be detected outer exhausted
Edge anti-pollution flashover coating.
The preparation method of electrical breakdown strength test sample, includes the following steps:
(1) be poured: the resin density of external insulation anti-pollution flashover coating to be detected is 1.4g/cm3, solvent density 0.9g/cm3,
Consider solvent volatilization noresidue situation.External insulation anti-pollution flashover coating 58.7g to be detected is taken, using Multi-channel liquid transfer device by 58.7g
External insulation anti-pollution flashover coating to be detected be cast on the circular die of diameter 100mm, stand 60min, obtain casting mold；It is more
The shape of the liquid transfer gun head end face of channel pipettor is also the circle of diameter 100mm.
Sample requires as circle in electrical breakdown strength test, and the mold used can make electrically to puncture strong also for circle
It is more acurrate to spend test result, reduces test error.By making the shape of Multi-channel liquid transfer device identical as mold shape, can make more
External insulation anti-pollution flashover coating to be detected is uniformly poured into mold by channel pipettor, so that sample is more uniform, further
Avoid the uneven bring uneven thickness of casting and surface wire drawing phenomenon.
(2) multistage rises negative pressure and bubble is discharged:
A: being put into vacuum glove box for the casting mold that step (1) obtains, reduce in vacuum glove box pressure to-
0.3MPa, coating surface has bubble discharge at this time, stands 90min, there is no continuous air bubbles discharges for coating surface at this time；
B1: continue to increase negative pressure to -0.4MPa, coating surface has bubble discharge at this time, stands 90min, at this time coating table
There is no continuous air bubbles discharges in face；
B2: continue to increase negative pressure to -0.5MPa, coating surface has bubble discharge at this time, stands 90min, at this time coating table
Face is there is no continuous air bubbles discharge, and coating surface is smooth and bubble-free；
C: the negative pressure of holding -0.5MPa is constant, stands 720min, and solvent volatilizees completely at this time, takes out, it is equal to obtain thickness
Even sample to be tested without wire drawing, bubble-free；
(3) it dries: the sample to be dried that step (2) obtains being put into baking oven, to be taken out after 100 DEG C of baking 48h, is obtained wait try
Test sample.
The sample to be tested that step (3) obtains needs the 5min after taking out baking oven to carry out electrical breakdown strength test.
Embodiment 2:
The all plates of volume resistivity test pilot scale are 100mm × 120mm copper sheet, and coating thickness requirement is 50 ± 5um, institute
To need the volume of external insulation anti-pollution flashover coating to be detected for 0.6cm3.Configure 0.6cm3External insulation anti-pollution flashover coating to be detected
The step of it is as follows:
Prepare external insulation anti-pollution flashover coating to be detected:
(1) by 10g Nano-meter SiO_22Particle is added to the in the mixed solvent of 57g ethyl acetate and 43g butyl acetate, then stirs
18min, speed of agitator 6000r/min are mixed, 12min is then stirred with the ultrasonic wave of 45Hz, obtains mixed solution；
(2) 100gFEVE resin is added in the mixed solution that step (1) obtains, stirs 70min, obtains preliminary coating；
(3) 0.5g defoaming agent and 10g curing agent are added in the preliminary coating that step (2) obtains, obtains to be detected outer exhausted
Edge anti-pollution flashover coating.
The preparation method of volume resistivity test sample, includes the following steps:
(1) be poured: the resin density of external insulation anti-pollution flashover coating to be detected is 1.4g/cm3, solvent density 0.9g/cm3,
Consider solvent volatilization noresidue situation.External insulation anti-pollution flashover coating 1.27g to be detected is taken, using Multi-channel liquid transfer device by 1.27g
External insulation anti-pollution flashover coating to be detected be cast in the rectangular mould of 100mm × 120mm, stand 60min, obtain casting moulds
Tool；The shape of the liquid transfer gun head end face of Multi-channel liquid transfer device is also the rectangle of 100mm × 120mm.
In volume resistivity test sample require be 100mm × 120mm rectangle, the mold used also for 100mm ×
The rectangle of 120mm can make electrical breakdown strength test result more acurrate, reduce test error.By allowing Multi-channel liquid transfer device
Shape it is identical as mold shape, can make Multi-channel liquid transfer device that external insulation anti-pollution flashover coating to be detected is uniformly poured into mould
In tool, so that sample is more uniform, the uneven bring uneven thickness of casting and surface wire drawing phenomenon are further avoided.
(2) multistage rises negative pressure and bubble is discharged:
A: being put into vacuum glove box for the casting mold that step (1) obtains, reduce in vacuum glove box pressure to-
0.4MPa, coating surface has bubble discharge at this time, stands 90min, there is no continuous air bubbles discharges for coating surface at this time；
B: continue to increase negative pressure to -0.6MPa, coating surface has bubble discharge at this time, stands 90min, at this time coating surface
There is no continuous air bubbles discharge, and coating surface is smooth and bubble-free；
C: the negative pressure of holding -0.6MPa is constant, stands 720min, solvent volatilizees completely at this time, then takes out, and obtains thickness
Uniformly, the sample to be dried without wire drawing, bubble-free；
(3) it dries: the sample to be dried that step (2) obtains being put into baking oven, to be taken out after 110 DEG C of baking 50h, is obtained wait try
Test sample.
The sample to be tested that step (3) obtains needs the 20min after taking out baking oven to carry out volume resistivity test.
Embodiment 3:
The present embodiment is same as Example 1, the difference is that, 30min is stood after casting in the step (1)；Step
(2) A stands 60min, step (2) B1Stand 60min, step (2) B2Stand 60min；Step (2) C stands 750min, obtains thickness
Spend the uniform, sample to be tested without wire drawing, bubble-free；Sample to be dried is put into baking oven by step (3), to take after 90 DEG C of baking 48h
Out；The sample to be tested that step (3) obtains needs the 1min after taking out baking oven to carry out electrical breakdown strength test.
Embodiment 4:
The present embodiment is same as Example 1, the difference is that, 45min is stood after casting in the step (1)；Step
(2) A stands 120min, step (2) B1Stand 120min, step (2) B2120min is stood, step (2) C stands 800min, obtains
Thickness uniformly, the sample to be tested without wire drawing, bubble-free；Sample to be dried is put into baking oven by step (3), after 120 DEG C of baking 48h
It takes out, the sample to be tested that step (3) obtains needs the 10min after taking out baking oven to carry out electrical breakdown strength test.
Embodiment 5:
The present embodiment is same as Example 1, the difference is that, 20min is stood after casting in the step (1)；Step
(2) A stands 50min, step (2) B1Stand 50min, step (2) B250min is stood, step (2) C stands 700min, obtains thickness
Degree uniformly, without wire drawing, but there are the samples to be tested of bubble；The sample to be tested that step (3) obtains needs taking out baking oven
30min carries out electrical breakdown strength test afterwards.
Embodiment 6:
The present embodiment is same as Example 1, the difference is that, 70min is stood after casting in the step (1)；Step
(2) A stands 130min, step (2) B1Stand 130min, step (2) B2Stand 130min, obtain thickness uniformly, without wire drawing, nothing
The sample to be tested of bubble；The sample to be tested that step (3) obtains needs the 35min after taking out baking oven to carry out electrical breakdown strength
Test.
Embodiment 7:
According to embodiment 1 and embodiment 3-6, time of repose is anti-to external insulation to be detected is prepared after analytical procedure (1) casting
The influence of the discharge effect of bubble is generated during pollution flashover coating, as shown in table 1:
Contrast table of the time of repose to bubble discharge effect after 1 step of table (1) casting
As seen from the above table, time of repose is too short after casting, prepares what external insulation anti-pollution flashover coating to be detected generated in the process
Bubble cannot be sufficiently discharged, it will increased the difficulty that bubble is discharged in subsequent step, reduced the working efficiency of subsequent step, make
Coating surface retains bubble, reduces test accuracy；Time of repose is too long after casting, can extend test period, reduces working efficiency,
So time of repose is preferably 30-60min after step (1) casting.
According to the time of repose of embodiment 1 and embodiment 3-6 analytical procedure (2) A-B to being generated in solvent volatilization process
The influence of the discharge effect of bubble, as shown in table 3.
Contrast on effect table is discharged to bubble in the time of repose of 2 step of table (2) A-B
As seen from the above table, when time of repose is lower than 60min, the bubble generated in solvent volatilization process is not completely exhausted out,
Reduce experimental accuracy；When being higher than 120min between upon standing, although bubble is sufficiently discharged, when extending test
Between, test efficiency is reduced, it is advantageous to, the time of repose of step (2) A-B is 60-120min.
It is volatilized according to the time of repose of embodiment 1, embodiment 3, embodiment 4 and 5 analytical procedure of embodiment (2) C to solvent
The influence of effect, as shown in table 3.
Solvent volatilization effect contrast table when 3 step of table (2) C difference time of repose
As seen from the above table, the time that step (2) C keeps negative pressure to stand needs to be greater than 720min, when being lower than 720min, solvent
Volatilization effect is poor, when being greater than 720min with outstanding volatilization effect.
According to embodiment 1 and embodiment 3-6, the sample to be tested that analytical procedure (3) obtains, after taking out baking oven, into
Influence of the interval time to electrical breakdown strength test accuracy before the electrical breakdown strength test of row, as shown in table 4.
The influence that 4 interval time of table tests electrical breakdown strength
As seen from the above table, the sample to be tested that step (3) obtains is carrying out electrical breakdown strength examination after taking out baking oven
Interval time before testing is shorter, and electrical breakdown strength test accuracy is higher, and interval time is longer, and test specimens to be checked can absorb more
Steam, coating surface formed moisture film, reduce electrical breakdown strength test accuracy.
Claims (10)
1. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample, which is characterized in that including as follows
Step:
(1) it is poured: external insulation anti-pollution flashover coating to be detected being cast on mold using Multi-channel liquid transfer device, is then allowed to stand, obtains
To casting mold；
(2) multistage rises negative pressure and bubble is discharged:
A: the casting mold that step (1) obtains is put into vacuum glove box, reduces pressure in vacuum glove box, until coating surface
There is bubble discharge, keeps the constant standing of negative pressure, there is no continuous air bubbles discharges up to coating surface；
B: continuing to increase negative pressure, until coating surface has a bubble discharge, keeps the constant standing of negative pressure, until coating surface there is no
Continuous air bubbles discharge；
C: repeating step B, until coating surface is smooth and bubble-free, the holding constant standing of negative pressure obtain until solvent volatilizees completely
To sample to be dried；
(3) it dries: the sample to be dried that step (2) obtains being put into baking oven, to take after 90-120 DEG C of baking 48h or 48h or more
Out, sample to be tested is obtained.
2. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, step (1) time of repose is 30-60min.
3. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, step (2) the A time of repose is 60-120min.
4. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, increasing negative pressure in step (2) B is 0.05-0.2MPa, time of repose 60-120min.
5. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, time of repose is 720min or 720min or more in step (2) C.
6. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, the sample to be tested that the step (3) obtains carries out electrical insulation properties examination after taking out baking oven within 30min
It tests.
7. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 6,
It is characterized in that, when the sample to be tested that the step (3) the obtains time exposed in air after taking out baking oven is greater than
For 24 hours, step (3) are re-started before carrying out electrical insulation properties test.
8. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, the electrical insulation properties test includes electrical breakdown strength test, volume resistivity test, surface resistivity
Test, resistance to electric trace and the test of galvanic corrosion damage, relative dielectric constant test, the test of dielectric loss tangent value and corona test.
9. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 1,
It is characterized in that, the external insulation anti-pollution flashover coating to be detected includes the component of following mass ratio: Nano-meter SiO_22Particle: mixing is molten
Agent: FEVE resin: defoaming agent: curing agent 0.05-0.1:1:1:0.005:0.1, mixed solvent are ethyl acetate and acetic acid fourth
The mass ratio of the mixture of ester, in the mixed solvent ethyl acetate and butyl acetate is 3:4.
10. a kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample according to claim 9,
It is characterized in that, the preparation method of the external insulation anti-pollution flashover coating to be detected, includes the following steps:
(1) by Nano-meter SiO_22In the mixed solvent is added in particle, stirs 15-20min, speed of agitator 6000-8000r/min, then
8-12min is stirred with the ultrasonic wave of 45-55Hz, obtains mixed solution；
(2) FEVE resin is added in the mixed solution that step (1) obtains, stirs 60-90min, obtains preliminary coating；
(3) defoaming agent and curing agent are added in the preliminary coating that step (2) obtains, obtains external insulation antifouling work to be detected and applies
Material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006731A (en) * | 2019-04-18 | 2019-07-12 | 国网山东省电力公司电力科学研究院 | The sampling die and method for making sample of the electrical performance test of external insulation anti-pollution flashover coating |
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