Large distance defouling isolator

The utility model relates to a large climbing distance antifouling isolator, which comprises an adhesive joint iron cap, a steel foot, and an insulating body. The utility model is characterized in the improvement of the structure of the insulating body. One scheme is that the insulating body is formed into a hollow bell-shaped body, and an outer surface of the middle part of the insulating body is provided with a plurality of hollow rounding circular disc bodies; a second scheme is that a bottom surface of an umbrella-shaped hollow circular disc body which is arranged at the lower part of the insulating body is provided with a plurality of rounding hollow frustum cone hollow bodies or hollow cylindrical hollow bodies. The utility model has the advantages that the leakage distance of an edge surface is increased, the leakage loss of a line is lowered, the surface of the insulating body can not be eroded by leaked water, etc. The utility model solves the problems of pollution flashover, and discharge fundamentally. The utility model is widely suitable for general high voltage lines, and contact screen lines of an electrified railway, and is especially suitable for being used for tunnels with serious water leakage and contact screen lines with insufficient mounting height to.