摘要
架空输电线路中导线大多裸露在大气中,部分架空线路中耐张线夹上扬,含有腐蚀性元素的雨水介质会通过导线线股间的缝隙进入耐张线夹铝管空腔部位,耐张线夹钢锚端铝管压接紧密,腐蚀性介质很难排出,长期积聚在中空的铝管内部形成腐蚀环境,耐张线夹铝管空腔钢锚和钢芯锈蚀会导致断线事故。新设计双注脂孔式耐张线夹,铝管空腔部位设计注脂孔和排气孔,易于注脂操作,更易于油脂注满,耐张线夹引流板设计为双板式,可增大线夹过电流面积、减小电阻,电气性能优于单板接触式,新设计双注脂孔式耐张线夹在性能上更加安全、稳定、可靠。
Most conductors in overhead transmission lines are exposed to the atmosphere and some tension clamps are uplifted,then the rainwater medium containing corrosive elements enters the aluminum tube cavity of the strain clamps through the gaps between the conductor strands.Due to the tight crimping of the aluminum tube at the anchor end,the corrosive medium is difficult to discharge.It accumulates inside the hollow aluminum tube for a long time then forms a corrosive environment where the steel anchor and steel core corrodes and eventually leads to a conductor breakage accident.The newly designed double-grease-hole strain clamp adds grease-injection holes and vent holes in the aluminum tube cavity,which is easy for grease-injection operations and easier to fill up with grease.Furthermore,the strain clamp adopts a double-plate type guide plate,which can increase the over-current area and reduce the resistance so that its electrical performance is better than that of single-plate type.In conclusion,the newly designed double-grease-hole strain clamp is safer,more stable and more reliable in performance.
作者
姚贵娇
陈作新
陆桂来
李成涛
YAO Guijiao;CHEN Zuoxin;LU Guilai;LI Chengtao(Nanjing Electric Power Fittings Design and Research Institute Co.,Ltd,Nanjing 211599)
出处
《电气技术》
2022年第12期100-103,108,共5页
Electrical Engineering
关键词
钢芯锈蚀
断线
双注脂孔
有限元分析
双板开叉式
steel core corrosion
conductor breakage
double-grease-hole
finite element analysis
double-plate split type
