Sealing device for electric power protection tube

The utility model discloses a sealing device for an electric power protection tube, which comprises a mounting rack, the lower end face of the mounting rack is fixedly connected with a circular truncated cone, the lower end face of the circular truncated cone is movably connected with a rotating sleeve, the bottom end of the inner wall of the circular truncated cone is fixedly connected with a straight sleeve, and the inner wall of the straight sleeve is movably connected with a limiting block. The lower end face of the limiting block is fixedly connected with an escapement rod, the lower end of the escapement rod is fixedly connected with an escapement end, the upper end face of the limiting block is fixedly connected with a lifting rod, and the upper end of the mounting frame is fixedly connected with a fixing block. According to the utility model, the escapement end is arranged at the tail end of the escapement rod and acts on the cable end inside the protection tube, so that the shaft diameter of the cabl