Working tool for live-line replacement of three-hole single connection plate linear insulator string

The utility model relates to a device for live-line replacement of an insulator on a high-voltage line, particularly to a working tool for live-line replacement of a three-hole single connection plate linear insulator string, and is suitable for a three-hole single connection plate type or a similar type electric power pole tower with a cross arm on a steel pipe pole of a 220kV power transmission line. The structural features of the working tool are that the tool comprises an upper clamping device and a lower clamping device; the upper clamping device includes an upper clamp and an upper pulley block, the lower clamping device includes a lower clamp and a lower pulley block, the structure of the lower clamp is a mapping structure of the upper clamp, a structural pattern is specially adopted in which the two clamps cooperate with the two pulley blocks, and inserted-pin type fork-shaped hanging plates are connected to three-hole single connection plates at an upper side and a lower side. The tool has a simple a