可控转动复合横担在输电铁塔中的应用研究

Study on Application of Controllable Ｒotating Composite Cross Arm in Transmission Tower

摘要:

复合横担通常布置成完全约束型或自由转动型，前者造价较高，后者则由于横担转动无规律造成运维困难。 为消除传统方案的弊端，提出了“V”串可控转动方案，既能完全约束正常运行时的转动，部分约束不均匀覆冰工况下 的转动，又能完全释放断线时的张力差，集中了完全约束型和自由转动型的优点，且造价与传统方案相当。通过对传 统方案的改进，确定了新型“V”串可控转动方案的结构布置、工作方式和荷载取值原则，为该方案的实施提供简便可 行的操作建议。

Abstract:

Composite cross arm is usually arranged into a fully constrained or free rotating type，the former is very expensive， while the latter results in the difficulties of operation and maintenance due to irregular rotation of the cross arm． In order to eliminate the shortcomings of the traditional design，the controllable rotating "V" series scheme is put forward，that is，while all of the cross arms can be constrained in normal operation，some of the cross arms can be constrained in non － uniform ice conditions，and all of them can freely rotate in wire breakage situation． With similar cost，the "V" series scheme includes all the advantages of fully constrained scheme and freely rotating scheme． Through the improvement of the traditional schemes， the structure arrangement，the working mode and the load value principle of the new type " V" series controllable rotating scheme are determined，which can provide a simple and feasible operation suggestion for the proposed scheme．