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Method for preventing ice from covering surface of power transmission bare conductor

A bare wire and ice-coating technology is applied in the field of effectively suppressing the formation of icing on the surface of bare wires for power transmission. Ultra-hydrophobic, simple process effect

Inactive Publication Date: 2009-11-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the relevant anti-icing coatings with anti-icing effect can only reduce the adhesion between ice and the coating but cannot effectively inhibit the formation of the surface ice layer. For example, Farzaneh used Al 2 o 3 The surface prepared by / PTFE can reduce the shear stress between ice and aluminum by about 2.5 times, but it has not been found that it can effectively inhibit the formation of ice on the surface of aluminum

Method used

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  • Method for preventing ice from covering surface of power transmission bare conductor
  • Method for preventing ice from covering surface of power transmission bare conductor
  • Method for preventing ice from covering surface of power transmission bare conductor

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Put the aluminum wire (length 15cm, Φ2.76mm) in 20wt%, 25wt%, 30wt% mixed acid etchant for 1.5min, then wash it with ultrasonic pure water, dry it at 70°C for 30min, then dip it in 1.5 Wt% or 2.5wt% fluorosilane is low surface energy modification in the solution of fluorosilane FAS-17 for 12h, and then treated at 100°C for 2h to construct a super-hydrophobic coating with micro-nano pore structure on its surface, Surface microstructure of superhydrophobic anti-icing coating (such as image 3 shown). The mixed acid etchant is formed by mixing hydrofluoric acid, hydrochloric acid, nitric acid and sulfuric acid in a volume ratio of 1:3.5:1:1.

Embodiment 2

[0020] The above-mentioned aluminum wire rapidly treated with 25wt% mixed acid etchant, and the super-hydrophobic anti-icing aluminum wire modified with 2.5wt% fluorosilane solution low surface energy and the smooth aluminum wire without any treatment were treated at -6°C In the following low-temperature environment, supercooled water (water temperature 0°C) was used to carry out the water spray ice coating comparison test, and the surface was covered with ice to actually take pictures: The surface of the super-hydrophobic aluminum wire is coated with ice: as figure 1 a is spraying water for 10 minutes, figure 1 b means spraying water for 30 minutes, figure 1 c is spraying water for 60 minutes, figure 1 d is spraying water for 180 minutes; figure 2 Icing the surface of smooth aluminum wire without any treatment: such as figure 2 a is 10min, figure 2 b is 20min, figure 2 c is shown in 30min. It can be seen that the surface of the smooth aluminum wire without any treat...

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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 on the 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 [0001] The invention belongs to the technical field of anti-freezing power transmission wires, and in particular relates to a method for effectively suppressing the formation of ice-covered rime on the surface of bare power transmission wires. Background technique [0002] After the transmission wire is covered with ice, due to the increase of mechanical load, it will cause safety accidents such as disconnection, tower collapse, and wire galloping, which will seriously affect the reliable operation of the power system and become a hot spot in the research of safe operation of transmission lines. After decades of research on anti-icing and deicing methods, different anti-icing and deicing methods such as thermal deicing, mechanical deicing, and natural deicing have been gradually formed. However, these anti-icing and deicing methods are due to high energy consumption and limited effects. The range of use in the power system is limited. Coating anti-icing meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/22H01B7/28C23F1/16C23F1/20C23C22/00
Inventor 李成榕汪佛池吕玉珍杜岳凡
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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