CN100999624B - Compounding of inorganic anti-pollution coating for high pressure insulator surface and preparation process thereof - Google Patents
Compounding of inorganic anti-pollution coating for high pressure insulator surface and preparation process thereof Download PDFInfo
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Abstract
The present invention provides recipe and preparation process of inorganic pollution flashover preventing paint for high voltage insulator. The first kind of the paint consists of pure titania sol and hydrogen peroxide, and is prepared through preparing pure titania sol and adding hydrogen peroxide into the pure titania sol. The second kind of the paint consists of binary composite titania sol and hydrogen peroxide, and is prepared through preparing pure titania sol and adding hydrogen peroxide into the binary composite pure titania sol. The present invention can raise the self-cleaning performance of titania, and has simple technological process and facile material. The paint can form nanometer coating of inorganic matter in the surface of the outdoor insulator to reduce pollution and prevent pollution flashover.
Description
Technical field
The present invention relates to the anti-pollution flashover technology of high-tension insulator in the defeated modified line road of high pressure, more specifically relate to a kind of compounding of inorganic anti-pollution coating that is used for high pressure insulator surface and preparation method thereof.
Background technology
The pollution flashover phenomenon of high-tension insulator is serious problems in the high voltage power transmission and transforming road always, and the caused environmental pollution of economic in recent years growth fast causes pollution flashover phenomenon ascendant trend once.It has been generally acknowledged that insulator generation pollution flashover phenomenon must possess two conditions: the one, the filth amount that the insulator surface accumulation is certain, this is the filthy prerequisite that takes place; The 2nd, certain weather condition, as overcast and rainy, insulator surface filth this moment electric conductivity under certain humidity improves and the generation pollution flashover.Therefore, avoiding pollution flashover to take place can be by two kinds of approach: the one, reduce the contamination amount of insulator surface, and the 2nd, the insulating property of raising insulator surface make it can tolerate certain filth.With respect to first kind of approach, commonly used at present and effectively anti-pollution flashover measure is regularly to clean insulator surface, and this high-altitude or hot line work cost height, efficient is low and quality can't guarantee, and causes work accident easily.For second kind of approach, except the raising insulator chain quantity of routine improved the anti-pollution characteristic of insulator, domestic the most widely used method was the macromolecular material that applies the strong and good insulating of one deck hydrophobic nature at insulator surface at present, as RTV coating.Many patents (as the patent No. 95112601,93104478,02294128 and 85108664 etc.) relate in this respect.Though this method has improved the insulating property of insulator surface, improve the resistant of insulator relatively and dodged performance, it can not reduce filthy accumulation, along with the increase of the aging and filthy accumulation volume of insulator surface, can't avoid the generation of pollution flashover phenomenon all the time.Therefore, reducing filthy this precondition of accumulation at insulator surface is the key of avoiding pollution flashover to take place.
Summary of the invention
The objective of the invention is to be used for the particularly deficiency of the organic polymer coating on porcelain insulator surface of high-tension insulator, a kind of compounding of inorganic anti-pollution coating that is used for high pressure insulator surface and preparation method thereof is provided at existing.
The compounding of inorganic anti-pollution coating one that the present invention is used for high pressure insulator surface is: the weight proportion of each component of compounding of inorganic anti-pollution coating is: pure titinium dioxide colloidal sol 99.00%～99.99%; Hydrogen peroxide 0.01～1.0%.
The compounding of inorganic anti-pollution coating two that the present invention is used for high pressure insulator surface is: the weight proportion of each component of compounding of inorganic anti-pollution coating is: the binary composite oxide sol 99.00%～99.99% of titanium dioxide; Hydrogen peroxide 0.01～1.0%.
The preparation method that the present invention is used for the compounding of inorganic anti-pollution coating one of high pressure insulator surface is: (1): under the condition of acid pH＜5 or alkaline pH＞7 with the hydrolysis of alkoxide of titanium, obtain the colloidal sol of homogeneous transparent, by pH value to 1～5 of dialysis adjusting colloidal sol, prepare pure titinium dioxide colloidal sol; (2): the adding weight ratio is 0.01～1.0% hydrogen peroxide in pure titinium dioxide colloidal sol, makes inorganic anti-pollution coating.
The preparation method that the present invention is used for the compounding of inorganic anti-pollution coating two of high pressure insulator surface is: (1): prepare the binary composite oxide sol of titanium dioxide, and adjusting pH value is 1～5; (2): the adding weight ratio is 0.01～1.0% hydrogen peroxide in the binary composite oxide sol of titanium dioxide, makes inorganic anti-pollution coating.
Remarkable advantage of the present invention is:
One: the advantage of the present invention's prescription is: after adding hydrogen peroxide, pure titinium dioxide colloidal sol or binary composite titanium dioxide colloidal sol have improved the ratio of anatase titanium dioxide in the film at normal temperatures easily by crystallization, and then improve the light self-cleaning property of titanium dioxide.
Two: the advantage that preparation method of the present invention has that technology is simple, easy to operate, raw material is easy to get etc.
Three: after the high-tension insulator inorganic anti-pollution coating of the present invention preparation was coated in high pressure insulator surface, the coating of formation had concurrently ageing-resistant and characteristic such as anti-contamination, shows and the diverse anti-pollution flashover effect of RTV coating.Promptly the nano coating that forms at insulator surface is a kind of inorganic substance, has self-cleaning characteristic, can reduce the contamination degree under the outdoor use of insulator greatly, thereby fundamentally reduce the pollution flashover phenomenon that causes because of contamination.Potential safety hazard and extra-expense that this inorganic anti-pollution coating not only can reduce even avoid the cleaning of artificial high-altitude to be brought, and have the characteristics of the long and good stability of chemical stability height, life-span, thereby the aging hydrophobic nature phenomenon that loses that is prone to when having avoided the former outdoor use.The high-tension insulator antifouling flush paint of this invention preparation can be coated in porcelain, glass or composite organic insulator surface, serious area of particularly suitable environmental pollution or the electric transmission and distribution circuit from far-off regions that is not easy to safeguard, can reduce the maintenance cost and the running cost of power transmission path greatly, reduce the generation of work accident, have good economic benefit and social benefit.
Embodiment:
Prescription one: the weight proportion of each component is in the compounding of inorganic anti-pollution coating: pure titinium dioxide colloidal sol 99.00%～99.99%; Hydrogen peroxide 0.01～1.0%; In the pure titinium dioxide colloidal sol, the titanium dioxide weight content is 0.01～10.0%, and all the other are water.
Prescription two: the weight proportion of each component is in the compounding of inorganic anti-pollution coating: the binary composite oxide sol 99.00%～99.99% of titanium dioxide; Hydrogen peroxide 0.01～1.0%; Contain in the binary composite oxide sol of titanium dioxide, the titanium dioxide weight content is 0.01～10.0%, and the weight content of another kind of oxide component is 0.01～5.0%, and all the other are water; Another kind of oxide component can be a kind of in silica alumina, zinc oxide or the ferric oxide.
The preparation method of prescription one: (1): under the condition of acid pH＜5 or alkaline pH＞7,, obtain the colloidal sol of homogeneous transparent,, prepare pure titinium dioxide colloidal sol by pH value to 1～5 of dialysis adjusting colloidal sol with the hydrolysis of alkoxide of titanium; (2): the adding weight ratio is 0.01～1.0% hydrogen peroxide in pure titinium dioxide colloidal sol, makes inorganic anti-pollution coating.
The preparation method of prescription two: (1): prepare the binary composite oxide sol of titanium dioxide, and adjusting pH value is 1～5; (2): the adding weight ratio is 0.01～1.0% hydrogen peroxide in the binary composite oxide sol of titanium dioxide, makes inorganic anti-pollution coating.
Inorganic anti-pollution coating is used for the freshly prepd conventional insulator surface of non-online coating, and non-online coating method is: earlier insulator surface is cleaned up, after the drying coating is coated in insulator surface with spraying method, until drying.
Inorganic anti-pollution coating is used for online coating line insulation sub-surface, online coating method is: under the circuit powering-off state that the filth cleaning of insulator surface is clean, and then inorganic anti-pollution coating is coated in the exsiccant insulator surface equably or with atomizer inorganic anti-pollution coating is sprayed at insulator surface in the brushing mode.
The control of coated weight: in the coating procedure, the coated weight of inorganic anti-pollution coating is 2～25ml/m
2Meter, best coated weight is 5～15ml/m
2Meter; If by the film amount of solid, coated weight is 0.02～1.0g/m
2, best coated weight is 0.1～0.5g/m
2
Embodiment 1
Prescription one: the preparation of inorganic anti-pollution coating
Be made into homogeneous solution in the deionized water with 1.1mL concentrated nitric acid (68%) adding 150mL, titanium isopropylate with 12.5mL under violent stirring slowly splashes in the acidic aqueous solution, and the suspension that contains white precipitate that hydrolysis obtains continues to stir the colloidal sol that forms homogeneous transparent until the white precipitate dissolving down at 40 ℃.Colloidal sol packed into carry out dialysis with the 1L deionized water in the dialyzer bag and handle, changing water to a dialysis water final pH value every 8 hours is 3.2.Colloidal sol is taken out from dialysis bag, make weight content and be about 2.5% TiO 2 sol.
Under violent stirring, in the 100mL TiO 2 sol that makes, add the hydrogen peroxide reagent of 0.1mL, make inorganic anti-pollution coating A after stirring.
Embodiment 2
Prescription two: the preparation of inorganic anti-pollution coating
Under violent stirring, the 10mL tetraethoxy is slowly splashed in the solution that is made into by 0.5mL concentrated nitric acid (68%) and 20mL deionized water, continue to stir silicon dioxide gel until forming homogeneous transparent.This colloidal sol 10mL and 100mL are mixed by the TiO 2 sol of embodiment 1 preparation, then by with embodiment 1 in identical dialysis handle, adjust pH is 2.8.In this colloidal sol, the titanium dioxide weight content is 2.3%, and silica weight content is 1.1%, and the pH value is 2.8.
In the titania-based complex sol of the 100mL that makes, add the hydrogen peroxide reagent of 0.1mL, make inorganic anti-pollution coating B after stirring.
Embodiment 3
Prescription three: the preparation of inorganic anti-pollution coating
Be made into homogeneous solution in the deionized water with 1.1mL concentrated nitric acid (68%) adding 150mL, titanium isopropylate and 1mL aluminum isopropylate with 12.5mL under violent stirring slowly splash in the acidic aqueous solution, the suspension that contains white precipitate that hydrolysis obtains continues to stir the colloidal sol that forms homogeneous transparent until the white precipitate dissolving down at 40 ℃, carry out dialysis by embodiment 1 identical method and handle, to the pH value be 3.0.In this colloidal sol, the titanium dioxide weight content is 2.5%, and alumina weight content is 0.2%, and the pH value is 3.0.
In the above-mentioned 100mL titanium dioxide that makes-aluminum oxide binary complex sol, add the hydrogen peroxide reagent of 0.1mL, make inorganic anti-pollution coating C after stirring.
Embodiment 4
Prescription four: the preparation of inorganic anti-pollution coating
Be made into homogeneous solution in the deionized water with 2 milliliters of concentrated nitric acids (68%) adding 200mL, titanium isopropylate and 2mL propyl carbinol zinc with 12.0mL under violent stirring slowly splash in the acidic aqueous solution, the suspension that contains white precipitate that hydrolysis obtains continues to stir the colloidal sol that forms homogeneous transparent until the white precipitate dissolving down at 40 ℃, carry out dialysis by embodiment 1 identical method and handle, to the pH value be 3.3.In this colloidal sol, the titanium dioxide weight content is 2.0%, and the zinc oxide weight content is 0.3%, and the pH value is 3.3.
In the above-mentioned 200mL titanium dioxide that makes-aluminum oxide binary complex sol, add the hydrogen peroxide reagent of 0.3mL, make inorganic anti-pollution coating D after stirring.
Embodiment 5
Prescription five: the preparation of inorganic anti-pollution coating
Be made into homogeneous solution in the deionized water with 1.5mL concentrated nitric acid (68%) adding 200mL, titanium isopropylate and 5mL0.2M iron acetate solution with 16.0mL under violent stirring slowly splash in the acidic aqueous solution, the suspension that contains white precipitate that hydrolysis obtains continues to stir the colloidal sol that forms homogeneous transparent until the white precipitate dissolving down at 40 ℃, carry out dialysis by embodiment 1 identical method and handle, to the pH value be 3.0.In this binary complex sol, the titanium dioxide weight content is 2.5%, and the ferric oxide weight content is 0.03%, and the pH value is 3.0.
In the above-mentioned 200mL titanium dioxide that makes-aluminum oxide binary complex sol, add the hydrogen peroxide reagent of 0.25mL, make inorganic anti-pollution coating E after stirring.
The coating of antifouling flush paint
At surface clean and the conventional XWP-70 porcelain insulator of exsiccant finished surface, be the even inorganic anti-pollution coating A that makes that sprays of spray gun of 1.2ml with the shower nozzle diameter, quantity for spray is about 1.5ml, and spraying back seasoning makes antifouling flash insulator A.By same quadrat method,, make antifouling flash insulator B at XWP-70 porcelain insulator surface-coated 1.5mL inorganic anti-pollution coating B.
Inorganic anti-pollution coating A is diluted one times with deionized water, and this moment, the solid weight content of titanium dioxide was 1.25%.This coating 3.0mL is sprayed on single XWP-70 insulator surface, makes antifouling flash insulator C after the seasoning.
The oil puncture performance test
The antifouling flash insulator A, the B that make and each three of C are carried out the oil puncture test in special arrangement, applying voltage is the 140kV alternating-current, observes whether it breakdown, compares with the common insulator of uncoated antifouling flush paint simultaneously.
The result shows that the oil puncture phenomenon does not all appear in antifouling flash insulator A, B, C and common insulator, and this shows after insulator surface applies antifouling flush paint can satisfy the oil resistant breakdown performance.
The anti-contamination performance evaluation of anti pollution flashover high tension ceramic insulator
(1) conventional outdoor placement: insulator A, the B and the C that make are placed on the open air, observe its surperficial anti-pollution characteristic, and compare with common insulator print.Observe its surface after 15 days and find that anti-pollution flashover high-tension insulator A, B and C surface almost do not change, totally as before, and common insulator surface is stained with tiny particle dust, and color is also darker.
(2) the open air placement after harsh the processing: anti pollution flashover high tension ceramic insulator sample A, B, C and the conventional ceramic insulator sample that will test, the surface is stained with transformer oil directly are placed on the open air, observe its surperficial contamination situation.Result's demonstration, after the week, antifouling flash insulator sample A, B and C surface clean, oil stain decomposition, water can be evenly wetting; And common insulator sample has particulate matter such as dust, and greasy dirt is undecomposed, and water is pearl.
As seen, insulator surface shows good anti-contamination performance after applying antifouling flush paint.
The electric property evaluation of antifouling flash insulator
Anti-pollution flashover high pressure porcelain insulator A, the B and the C that make are carried out conventional electrical performance test (being undertaken by GB/T 775.2-2003), test subject is mainly thunder and lightning all-wave impulse flashover voltage test (dividing monolithic string and 5 strings), and with common insulator relatively, the results are shown in Table shown in 1.
The machinery of table 1 sample, electric performance test result
Table 1 result shows that the anti-thunder and lightning all-wave impulse flashover voltage value of antifouling flash insulator A and B is suitable with the insulator of common same model, can satisfy the country and the industry standard of insulator.
The leakage current of anti-pollution flashover high-tension insulator
With the antifouling flash insulator sample A that makes totally 7 strings carry out leakage current measurement together, apply voltage of alternating current 65.03kV, leakage current (total current) is 142.5 μ A, and 7 strings of conventional ceramic insulator leakage current (total current) together is 135.1 μ A under the same test condition.This shows, after common insulator applied antifouling flush paint, its surperficial leakage current slightly increased, and has embodied certain titanium dioxide semiconductor characteristic, but more real semiconducting insulation of its value is much lower.This illustrates that also the main effect of this type of inorganic anti-pollution coating is to make insulator surface reduce contamination, rather than utilizes its characteristic of semiconductor.
Claims (5)
1. inorganic anti-pollution coating that is used for high pressure insulator surface, it is characterized in that: the weight proportion of each component of coating based gross weight is in the prescription of described inorganic anti-pollution coating: pure titinium dioxide colloidal sol 99.00%～99.99%; Hydrogen peroxide 0.01～1.0%; Based on the colloidal sol gross weight, the titanium dioxide weight content is 0.01～10.0% in the described pure titinium dioxide colloidal sol, and all the other are water.
2. inorganic anti-pollution coating that is used for high pressure insulator surface, it is characterized in that: the weight proportion of each component of coating based gross weight is in the prescription of described inorganic anti-pollution coating: the binary composite oxide sol 99.00%～99.99% of titanium dioxide; Hydrogen peroxide 0.01～1.0%; Based on the colloidal sol gross weight, the titanium dioxide weight content is 0.01～10.0% in the binary composite oxide sol of described titanium dioxide, and the weight content of another kind of oxide component is 0.01～5.0%, and all the other are water.
3. be used for the inorganic anti-pollution coating of high pressure insulator surface according to claim 2, it is characterized in that: described another kind of oxide component is a kind of in silicon-dioxide, aluminum oxide, zinc oxide or the ferric oxide.
4. preparation method who is used for the inorganic anti-pollution coating of high pressure insulator surface as claimed in claim 1, it is characterized in that: (1): under the condition of acid pH＜5 or alkaline pH＞7 with the hydrolysis of alkoxide of titanium, obtain the colloidal sol of homogeneous transparent, by pH value to 1～5 of dialysis adjusting colloidal sol, prepare pure titinium dioxide colloidal sol; (2): the adding weight ratio is 0.01～1.0% hydrogen peroxide in pure titinium dioxide colloidal sol, makes inorganic anti-pollution coating.
5. a preparation method who is used for the inorganic anti-pollution coating of high pressure insulator surface as claimed in claim 2 is characterized in that: (1): prepare the binary composite oxide sol of titanium dioxide, and adjusting pH value is 1～5; (2): the adding weight ratio is 0.01～1.0% hydrogen peroxide in the binary composite oxide sol of titanium dioxide, makes inorganic anti-pollution coating.
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| CN102863825A (en) * | 2012-09-18 | 2013-01-09 | 南通博宇机电有限公司 | Anti-pollution-flashover paint |
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| CN105175025A (en) * | 2015-09-05 | 2015-12-23 | 苏州宏久航空防热材料科技有限公司 | Silicon carbide fiber surface alumina-titanium oxide composite coating preparation method |
| CN106187202A (en) * | 2016-07-14 | 2016-12-07 | 安徽樵森电气科技股份有限公司 | A kind of aluminium nitride ceramics insulator preparation method |
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