Breathing type ton barrel cover assembly

The utility model belongs to the technical field of tonnage barrel covers, and particularly relates to a breathing type tonnage barrel cover assembly which comprises a tonnage barrel cover body and a protective cover arranged above the tonnage barrel cover body in a covering mode, the tonnage barrel cover body and the tonnage barrel cover body are communicated with a conveying pipeline, the conveying pipeline comprises a tail gas exhaust pipe and a material pipe, and a square adsorption groove is formed in the lower portion of the top in the protective cover. The square adsorption groove is filled with adsorption filler, and the adsorption filler adsorbs tail gas exhausted by the tail gas exhaust pipe and exhausts the tail gas through a gas outlet formed in the top of the protection cover. According to the suction type ton barrel cover assembly, the protective cover is arranged on the ton barrel cover body in a covering mode so that harmful solvents can be prevented from directly volatilizing to the productio