Development and Application of SZ-type double-back straight tower with live replacement overhang insulator suspension line card

Abstract

In recent years, SZ-type tower and other angular-type cross-bearing head plus slings of the cross-stretcher structure of the tower on-line has been widely used. However, there is currently no special card in line with it. Therefore, this paper puts forward the use of aluminum alloy as a material developed that can be stuck in the cross-stretcher head of the 220 kV SZ-type double-back straight tower with live replacement overhang insulator hanging line card. It includes a screw lever, a wire lever with a hook hook in the lower part of the bar, and a screw lever connected to a crossbar card. The cross-stretcher mount has a cavity in the middle and a screw seat on both sides, with each screw lever standing on the screw seat when used. The cross-load mount holder is on the sZ-type double-back straight-line tower cross-mounted plate, which can be used for installation on the SZ-type tower. It provides a screw hanging point when the SZ-type tower is charged to replace the insulator. It has the characteristics of simple structure, reasonable and safe use.