Protection device for electromechanical installation construction

The utility model discloses a protective device for electromechanical installation and construction. The manhole cover comprises a cover plate and a manhole, a plurality of supporting rods are annularly and evenly distributed on the cover plate, an isolation mesh is arranged between every two adjacent supporting rods, a connecting rod is arranged in the center of the lower surface of the cover plate, one end of the connecting rod penetrates into the manhole, a frame is arranged at the end, penetrating into the manhole, of the connecting rod, and screw holes are formed in the two opposite sidewalls of the frame. The last worker enters the inspection well; grippable frame, continuously moving along with the crawling ladder; the frame can be put into the manhole from the wellhead of the manhole; at the moment, the frame is rotated, the position of the bolt corresponding to the inner wall of the manhole is changed until the bolt corresponds to the insertion hole, and the bolt is rotated to rotationally move outwa