Polishing and spraying device for secondary lining trolley

The secondary lining trolley grinding and spraying device comprises a secondary lining trolley body and a grinding mounting seat, a grinding disc is mounted on the inner wall of the grinding mounting seat, a cleaning fixing seat is further mounted at the end of the grinding mounting seat, the bottoms of the grinding mounting seat and the cleaning fixing seat are connected with a connecting base, and a driving assembly is mounted at the bottom of the connecting base; a spraying assembly is further connected to the side face of the cleaning fixing base and comprises an annular block connected with the cleaning fixing base, a hollow cavity is formed in the annular block, the outer wall of the annular block is connected with a conveying pipe connected with the hollow cavity in a communicating mode, and a plurality of connecting pipes connected with the hollow cavity in a communicating mode are further arranged on the inner wall of the annular block. The other end of each connecting pipe is connected with a sprayi