Manhole cover for municipal construction

The utility model discloses a manhole cover for municipal construction is equipped with the retainer plate in the buckle circle, the retainer plate lower part is equipped with the safety cover, and the safety cover is arc setting, and the safety cover comprises a plurality of connecting strip cross arrangements, and adjacent connecting strip interval sets up, and the safety cover lower part is equipped with the telescopic link, and the telescopic link lower part is equipped with the couple, and it is further fixed through the couple that the filtration cuts the dirt string bag, and the filtration is equipped with the active carbon filter layer in cutting the dirty string bag, and the telescopic link is assembled by a plurality of sleeve pipes and is formed, be equipped with leak hole and reinforcement on the well lid body, still be connected with the nitrogen gas bracing piece between well lid body and the retainer plate. The utility model provides a manhole cover for municipal construction has dual filter ef