Follow-up capping device for sewage treatment plant

The utility model discloses a follow-up capping device for a sewage treatment plant, and relates to the technical field of sewage treatment. The device comprises a tank body, a cover body steel frame and a sealing piece, a central bearing platform is arranged at the axis in the tank body, the cover body steel frame is rotationally connected with the central bearing platform through a rotary assembly, a working bridge is fixed at the top of the cover body steel frame, an outer rail is arranged on the outer convex edge of the tank body, a plurality of driving wheels are arranged on the outer side of the cover body steel frame, and the driving wheels move along the outer rail. The glass steel plates are arranged on the upper surface and the side faces of the follow-up steel frame, the follow-up steel frame covers the sewage pool, the center of the follow-up steel frame is erected at the top end of the center bearing platform of the sewage pool through the steel frame center rotation assembly, all equipment is ar