用于35kV以下配电电缆护套的聚脲修复涂料  

Polyurea Repair Coatings for Protective Sheaths of Distribution Cables Below 35 kV

作　　者：吴钊贤 朱敏 陈前锋 夏金鑫 龙城 孙琦 WU Zhaoxian;ZHU Min;CHEN Qianfeng;XIA Jinxin;LONG Cheng;SUN Qi(State Grid Anhui Electric Power Co.,Ltd.,Nanling County Power Supply Company,Wuhu,Anhui 242400,China;Institute of Advanced Technology,University of Science and Technology of China,Hefei 230000,China)

机构地区：[1]国网安徽省电力有限公司南陵县供电公司,安徽芜湖242400 [2]中国科学技术大学先进技术研究院,合肥230000

出　　处：《涂料工业》2025年第3期69-74,82,共7页Paint & Coatings Industry

基　　金：国网安徽省电力有限公司科技项目(B612C3240002)。

摘　　要：在当前的电力传输系统中,35 kV以下的电力电缆被广泛使用。这些电缆的外层保护结构,即电缆护套,经常会出现局部裂纹和损坏的情况,目前缺乏有效的现场修复技术,导致护套损坏的电缆往往需要整体更换,增加了维护时间和成本。针对这一问题,成功开发了一种满足使用标准的聚脲基涂料,将其直接涂覆在电缆护套的损坏区域,待固化成型后即可完成修复。该涂料具有以下特性:表干时间≤1 h,实干时间≤12 h;完全固化后,涂层的静态水接触角达到127°,拉伸强度达到21 MPa,且3 mm厚的击穿电压达到56 kV,吸水率为2.7%,耐人工气候老化720 h涂层无变化,断裂伸长率为498%,耐磨性为20 mg,可用于35 kV以下配电电缆护套的现场修复。In the current power transmission system,cables below 35 kV are widely used.The outer protective structure of these cables,the cable sheath,is often subject to localized cracking and damage.Due to a lack of effective on-site repair techniques,damaged cables often require full replacement,increasing maintenance time and costs.To solve this issue,a polyurea-based coating that meet usage standards has been developed.This coating can be directly applied to the damaged areas of the cable sheath,and the repair will be completed after curing and molding.Key characteristics include:surface drying within 1 hour,full drying within 12 hours;fully cured,the static water contact angle of the coating reaches 127°,the tensile strength reaches 21 MPa,the breakdown voltage of 3 mm thick reaches 56 kV,the water absorption rate of 2.7%,no changes after 720 hours of artificial climate aging,the fracture growth rate of 498%,and the wear resistance of 20 mg.This solution provides an efficient and reliable on-site repair method for distribution cable sheaths below 35 kV.

关 键 词：电缆护套 聚脲涂料 修复 35 kV 

分 类 号：TQ635[化学工程—精细化工]