10kV绝缘横担的轻量化设计及应用研究

Study on Lightweight Design and Application of 10kV Insulated Crossarm

为充分发挥绝缘横担轻质高强的特点,提高绝缘横担的使用寿命,满足腐蚀严重区域的使用需求,引进高强铝合金材料对10 kV绝缘横担进行轻量化设计及应用研究。从横担芯体、中间固定金具及配套附件三个方面对绝缘横担进行了轻量化的结构设计,采用有限元软件进行了详细的计算分析,为试制提供技术支撑。采用高强铝合金材料对方棒和T形绝缘横担的中间固定金具和配套抱箍进行了试制,并进行了抗弯、抗拉和抗扭测试,结果均满足要求。为了验证铝合金材料金具在绝缘横担中使用的稳定性,对方棒绝缘横担进行了热机循环试验,然后对两端金具进行抗拉试验,结果表现良好。经统计,高强铝合金材料在10 kV绝缘横担中的应用,大幅降低了整体质量(减轻近40%),可大大减少安装运输成本。

In order to give full play to the characteristics of light weight and high strength of the insulated crossarm,improve the service life,and meet the service demand in the serious corrosion area,the lightweight design and application of 10 kV insulated crossarm by introducing high strength aluminum alloy material were studied in this paper.In this paper,the lightweight design of the insulated crossarm was carried out from three aspects:the cross arm core,the middle fixing hardware and the supporting accessories.The finite element software was used for detailed calculation and analysis to provide technical support for trial production.The intermediate fixing fittings and supporting hoops of square bar and T-shaped insulating cross arm made of high strength aluminum alloy were trial manufactured.The bending,tensile and torsion tests were carried out,and the results met the requirements.In order to verify the stability of aluminum alloy fittings used in insulating cross arm,the thermal mechanical cycle test of square bar insulating cross arm was carried out.Then,the tensile test of the fittings at both ends was carried out,and the result was good.According to statistics,the application of high-strength aluminum alloy material in 10 kV insulation cross arm greatly reduces the overall mass(by nearly 40%),and greatly reduces the installation and transportation costs.