Air supplying and filtering device for civil air defense engineering

The invention provides an air supplying and filtering device for civil air defense engineering. The device comprises an interwoven fabric filter plate, a multilayer sintered metal filter plate, an alloy protective screen plate, a main supporting roller, a driving baffle, sealing rubber sheets and a connecting rod, wherein the sintered metal plate is clamped on the right side of the interwoven fabric filter plate; the alloy protective screen plate is mounted on the right end surface of a filtering shell. By means of the design, the problem that an original air supply structure for civil air defense engineering does not have filtering and purifying capacity is solved. The main supporting roller is installed on the upper side of the inner wall of an adjusting shell the driving baffle is clamped on the annular side surface of the main supporting roller, the connecting rod is inserted into the rear side in the driving baffle and the sealing rubber sheets are symmetrically clamped on the front and rear ends of the