新型快挥发带电清洗剂对支柱复合绝缘子的溶胀效应及改进

Swelling Effect and Improvement of New Fast Volatile Electrified Cleaning Agent on Post Composite Insulators

直流硅橡胶绝缘子积污后对其绝缘性能和使用寿命有重要影响,一般通过带电清洗剂进行清洗,而在带电清洗剂下的溶胀效应带来的不利影响是有待解决的关键问题。对1、2号两种带电清洗剂挥发速率、硅橡胶在不同带电清洗剂清洗前后的溶胀性以及憎水性的变化进行了试验研究,并探讨了相应的机制。结果表明:1、2号带电清洗剂在25℃时的挥发速率分别为1095.78 g/(h·m^(2))和108.01 g/(h·m^(2));硅橡胶溶胀度随时间的增加而增大,溶胀10 h后达到饱和,饱和后的硅橡胶溶胀指数分别为55%和130%;1号带电清洗剂会削弱硅橡胶的憎水性,经过10 min浸泡,接触角下降了14%,2号带电清洗剂能增强硅橡胶的憎水性,经相同时间浸泡,接触角上升了6%,因而挥发性优良的带电清洗剂可以降低溶胀对硅橡胶绝缘子的不利影响。

The contamination of DC silicone rubber insulator has an important influence on its insulation performance and service life,and the adverse effects of swelling effect under the insulation cleaning agent is the key issue to be solved.The volatilization rate of two kinds of electrified cleaning agent,the swelling and hydrophobicity of silicone rubber before and after cleaning by different cleaning agents were studied,and the corresponding mechanism was discussed.The results show that the volatilization rates of No.1(fast volatilization)and No.2(slow volatilization)electrified cleaning agents at 25℃are 1095.78 g/(h·m^(2))and 108.01 g/(h·m^(2)),respectively.The swelling index of silicone rubber increases with the increase of time,it reaches saturation after 10 h,and the swelling index of the saturated silicone rubber are 55%and 130%,respectively.The hydrophobicity of silicone rubber is weakened by No.1 cleaning agent,and the contact angle decreases by 14%after soaking for 10 min.The hydrophobicity of silicone rubber is enhanced by No.2 cleaning agent,and the contact angle increases by6%after soaking for the same time.Therefore,the cleaning agent with excellent volatility can reduce the adverse effect of swelling on the silicone rubber insulators,and can provide basis and reference for the electrified cleaning of silicone rubber insulation equipment.