Lightning-protection device for insulator through employing corrugated pipe for double-adjustment of parallel gap

The utility model provides a lightning-protection device for an insulator through employing a corrugated pipe for the double-adjustment of a parallel gap, and the device comprises an insulator. Two ends of the insulator are respectively in fixed connection with a ground-side electrode and a wire-side electrode, which are respectively a claw with at least three fingers. The fingers at two sides of the insulator are equal in number and are correspondingly arranged. The device provided by the utility model is simple in structure, and is convenient to install. The fingers of the ground-side electrode or the wire-side electrode are connected movably, and move along the plane where the axis of the insulator is located, so as to adjust the distance between the ground-side electrode and the wire-side electrode. The device can be used for insulators with different lengths.