CN101577151B - Method for preventing ice from covering surface of power transmission bare conductor - Google Patents
Method for preventing ice from covering surface of power transmission bare conductor Download PDFInfo
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- CN101577151B CN101577151B CN2009100869976A CN200910086997A CN101577151B CN 101577151 B CN101577151 B CN 101577151B CN 2009100869976 A CN2009100869976 A CN 2009100869976A CN 200910086997 A CN200910086997 A CN 200910086997A CN 101577151 B CN101577151 B CN 101577151B
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Abstract
The invention discloses a method for preventing ice from covering the surface of a power transmission bare conductor, belonging to the technical field of power transmission conductor freezing prevention. A super-hydrophobic coating is covered on the surface of the power transmission bare conductor so as to prevent glaze ice coating from forming on the surface of the power transmission conductor, thereby preventing the harms caused to the reliable operation of a power system by incidents such as wire breakage, tower falling-down and conductor galloping and the like which are brought by ice covering of the power transmission conductor. The method utilizes a chemical etching method to constitute a surface with a micro-nano-pore structure on an aluminum conductor and an aluminum substrate, carries out modification with low-surface-energy material and then obtains the structural coating with good super-hydrophobicity. The coating can effectively prevent the glaze ice coating from forming onthe surface in the condition of low-temperature drizzling or freezing rain and ice coating. The method has the advantages of simple operation, low cost, good ice prevention effect and the like.
Description
Technical field
The invention belongs to the anti-icing freeze techniques of transmission pressure field, the method that particularly a kind of effective inhibition transmission of electricity plain conductor surface glaze icing forms.
Background technology
Because the mechanical load increase will cause broken string, fall security incidents such as tower, conductor galloping, have a strong impact on the reliability operation of electric power system behind the transmission pressure icing, become the focus that the transmission line safe operation is studied.Anti-icing and deicing method research through decades, progressively formed different anti-icing and deicing methods such as heating power deicing, mechanical deicing, natural force deicing, but these anti-icing and deicing methods have limited the scope of application in electric power system because power consumption is high, effect is limited etc.The anti-icing method of coating is because characteristics such as simple on engineering, no energy consumption, cost be low have become one of anti-icing research focus of transmission line.The coating that is used for anti-icing at present mainly comprises: utilize the material self-heating to suppress the electric heating ice-phobic coating that surperficial icing forms, it need consume certain electric energy; Utilize the heating of material extinction to suppress the photo-thermal coating that surperficial icing forms, the difference of ambient light can directly influence its anti-icing effect; Another kind of is conventional hydrophobic material, utilizes its hydrophobicity performance to reduce the adhesion of coating surface ice but can not effectively suppress the formation of surperficial icing.To sum up, the operating characteristic that these coatings are different has separately determined the defective and the validity of its use.Ultraphobic water surface can effectively suppress the moistening behavior on surperficial water droplet formation and surface with it up to water droplet contact angle more than 150 ° and low water droplet glide angle, thereby effectively prevents the formation of surperficial icing, becomes the anti-icing approach that has potentiality.
The hydrophobic character of ultraphobic water surface is determined jointly by surface microscopic topographic and low-surface-energy coating material that mainly controlling the micro-structural of coating surface for this reason and choosing suitable low surface-coated material becomes key.The micro-convex structure of coating surface, particularly the micro nano structure of hierarchical structure helps catching air formation bubble pad, thereby reduce the contact area between water droplet and the coating, suppressed the interaction between water droplet and the coating, help the increase of contact angle and reducing of water droplet glide angle.After associated materials can obtain up to 160 ° of water droplet contact angle surfaces after modifying, and has the SiO of microcellular structure as constructing petal structure at the Mg-Li alloy surface
2Aeroge surface water droplet contact angle can be up to more than 170 °, but said structure do not see at aluminium material surface and construct, and more do not see the research of relevant anti-icing performance.At present relevant ice-phobic coating with anti-icing effect all can only reduce adhesion between ice and the coating and can not effectively suppress the formation of surperficial icing layer, utilizes Al as Farzaneh
2O
3The surface that/PTFE prepares can reduce about 2.5 times of shear stress between ice and aluminium, but does not see that it can effectively suppress the aluminium material surface icing and form.Construct surface at aluminium material surface by suitable method with micro nano structure for this reason, after modifying, relevant low-surface-energy material will obtain the body structure surface of good ultraphobic water again, this kind surface is the adhesion and the surperficial moistening behavior of limiting surface water droplet effectively, thereby can effectively suppress the formation of surperficial icing.
Summary of the invention
The method that the purpose of this invention is to provide a kind of plain conductor surface icing that suppresses to transmit electricity, it is characterized in that, the method of described inhibition transmission of electricity plain conductor surface icing is to adopt ultraphobic water coating to form icing to prevent glaze on transmission of electricity plain conductor surface on transmission of electricity plain conductor surface, treatment step is after using the mixing acidic etchant that etching processing 20s～1.5min is carried out on the plain conductor surface earlier, ultrasonic pure water is cleaned, 50-80 ℃ of temperature drying handled 20-40min, construct the micro/nano level pore space structure on its surface, impregnated in then and carry out low-surface-energy in the silicon fluoride solution of 1-5wt% and modify 12h, the plain conductor after low-surface-energy is modified is through 80～200 ℃ of ultraphobic water coatings that promptly obtain having good anti-icing performance after handling the 2h dried down.
Described mixing acidic etchant is by wherein mixing acidic etchant by hydrofluoric acid, hydrochloric acid, nitric acid, sulfuric acid 1: 3.5: 1 by volume: 1 mixes.
Described hydrofluoric acid, hydrochloric acid, nitric acid and sulfuric acid concentration are respectively 40%, 37%, 67%, 98%.
The concentration of described mixing acidic etchant is 20-40wt%.
Described transmission of electricity plain conductor is an aluminum conductor.
The invention has the beneficial effects as follows and adopt simple chemical etching method on aluminum conductor, to construct surface with micro-nano pore space structure, this surface has good ultraphobic water-based after low surface energy fluorine is hydride modified, can effectively suppress the formation of surperficial icing, solve the icing problem on transmission pressure surface under the cryogenic freezing weather.The raw material that we adopt is the product that common industrial production is come out, and does not carry out any processing, and technology is simple, so the ultraphobic water ice-phobic coating of this kind is suitable for industrial mass production.
Description of drawings
Fig. 1 be the ultraphobic water ice-phobic coating in aluminum steel surface low temperature subcooled water water spray a.10min, b.30min, c.60min, surface icing situation d.180min the time.
Fig. 2 aluminum steel surface without the smooth aluminum steel of any processing low temperature subcooled water water spray a.10min, b.20min, surface icing situation c.30min the time.
The ultraphobic water ice-phobic coating of Fig. 3 surface microstructure figure.
Embodiment
The invention provides a kind of method of the plain conductor surface icing that suppresses to transmit electricity, form ultraphobic water coating on transmission of electricity plain conductor surface and form icing on transmission of electricity plain conductor surface, thereby prevent the formation of surperficial icing to prevent glaze.The following mixing acidic etchant of being made up of hydrofluoric acid, hydrochloric acid, nitric acid, sulfuric acid of using is earlier carried out etching to plain conductor (aluminum steel) surface, ultrasonic pure water is cleaned, 50-80 ℃ of temperature drying handled, construct the surface texture that roughness is a micro/nano level on its surface, impregnated in then and carry out the low-surface-energy modification in the silicon fluoride solution, be the ultraphobic water coating for preparing in this patent after aluminum steel drying after low-surface-energy is modified is handled, further specify the present invention below in conjunction with embodiment with good anti-icing performance.
Figure 1 shows that the ultraphobic water ice-phobic coating in aluminum steel surface low temperature subcooled water water spray a.10min, b.30min, c.60min, surface icing situation d.180min the time.
Fig. 2 without the smooth aluminum steel of any processing low temperature subcooled water water spray a.10min, b.20min, surface icing situation c.30min the time.
The ultraphobic water ice-phobic coating of Fig. 3 surface microstructure figure.
Embodiment 1
After placing 20wt%, 25wt%, 30wt% to mix acidic etchant fast processing 1.5min the aluminum steel (long 15cm, Φ 2.76mm), ultrasonic pure water is cleaned, behind 70 ℃ of following dried 30min, the silicon fluoride that impregnated in 1.5wt% or 2.5wt% is to carry out low-surface-energy in the solution of silicon fluoride FAS-17 to modify 12h, then after handling 2h under 100 ℃, construct the ultraphobic water coating of micro/nano level pore space structure, ultraphobic water ice-phobic coating surface microstructure (as shown in Figure 3) on its surface.Wherein mix acidic etchant by hydrofluoric acid, hydrochloric acid, nitric acid, sulfuric acid 1: 3.5: 1 by volume: 1 mixes.
Embodiment 2
With the above-mentioned aluminum steel that mixes the acidic etchant fast processing through 25wt%, and the anti-icing aluminum steel of ultraphobic water after modifying with the silicon fluoride solution low-surface-energy of 2.5wt% and in low temperature environment below-6 ℃, adopt subcooled water (0 ℃ of water temperature) the icing contrast test of spraying water, its surperficial icing actual photographed photograph: ultraphobic water aluminum steel surface icing situation: be spray water 180min for water spray 30min, Fig. 1 c for water spray 60min, Fig. 1 d for water spray 10min, Fig. 1 b as Fig. 1 a without the smooth aluminum steel of any processing; Fig. 2 is the smooth aluminum steel surface icing situation without any processing: as Fig. 2 a is that 10min, Fig. 2 b are that 20min, Fig. 2 c are shown in the 30min.Promptly formed the icing layer of one deck densification as can be seen without the smooth aluminum steel surface of any processing in low temperature subcooled water water spray 10min rear surface, constantly increased along with water spraying time increases surperficial icing layer thickness; And the anti-icing lead that applies ultraphobic water-bound coating only the icing point occurs at most advanced and sophisticated place of wire end and lead anchor clamps place behind low temperature subcooled water water spray 10min, even should after reaching the effect of 180min low temperature subcooled water, not occur any new icing point yet by anti-icing lead, illustrate that thus the present invention has effectively long-time anti-icing performance; By comparative analysis as can be seen the anti-icing lead of the ultraphobic water-bound coating of this coating have good anti-icing performance.
Claims (1)
1. method of plain conductor surface icing that suppresses to transmit electricity, it is characterized in that, the method of described inhibition transmission of electricity plain conductor surface icing is to adopt ultraphobic water coating to form icing to prevent glaze on transmission of electricity plain conductor surface on transmission of electricity plain conductor surface, treatment step is that first working concentration is respectively 40% hydrofluoric acid, 37% hydrochloric acid, 67% nitric acid and 98% sulfuric acid, 1: 3.5: 1 by volume: 1 mixed became acidic etchant, employing concentration is after the mixing acidic etchant of 20-40wt% is carried out etching processing 20s～1.5min to naked aluminum conductor surface, ultrasonic pure water is cleaned, 50-80 ℃ of temperature drying handled 20-40mi n, construct the micro/nano level pore space structure on its surface, impregnated in then and carry out low-surface-energy in the silicon fluoride solution of 1-5wt% and modify 12h, the plain conductor after low-surface-energy is modified is through 80-200 ℃ of ultraphobic water coating that promptly obtains having good anti-icing performance after handling the 2h dried down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100869976A CN101577151B (en) | 2009-06-12 | 2009-06-12 | Method for preventing ice from covering surface of power transmission bare conductor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100869976A CN101577151B (en) | 2009-06-12 | 2009-06-12 | Method for preventing ice from covering surface of power transmission bare conductor |
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| CN101577151B true CN101577151B (en) | 2011-05-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176354B (en) * | 2011-02-21 | 2012-07-25 | 山东大学 | Anti-icing method of aerial service steel-cored aluminum strand |
| CN102290147B (en) * | 2011-06-22 | 2013-04-24 | 华北电力大学（保定） | Method for preparing super hydrophobic ice covering resistant aluminum twisted wire |
| CN103236311B (en) * | 2013-04-15 | 2015-07-15 | 国家电网公司 | Nano functional anti-icing conductor |
| CN104480423B (en) * | 2014-11-20 | 2016-11-30 | 中国科学院宁波材料技术与工程研究所 | A kind of method utilizing Ultrasonic Arc Sprayed to prepare super-hydrophobic coat |
| CN108468044B (en) * | 2018-02-19 | 2020-02-18 | 桂林理工大学 | Method for preparing graphene-doped self-assembled composite film on surface of aluminum alloy |
| CN113450945A (en) * | 2021-07-20 | 2021-09-28 | 重庆大学 | Self-repairing anti-icing aluminum stranded wire with composite hole and preparation method thereof |
| CN115831461A (en) * | 2022-11-30 | 2023-03-21 | 浙江中行新材料科技有限公司 | Anti-icing and anti-corrosion overhead line and preparation method thereof |
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