Double-layer sealing dust suppression device used on belt conveyor

The utility model relates to the technical field of belt conveyors, in particular to a double-layer sealing dust suppression device used on a belt conveyor. According to the technical scheme, the conveying device comprises conveying rack plates, two transmission wheels and a conveying belt, the opposite faces of the two conveying rack plates are each fixedly connected with a sealing wide pipe located at the joint of the conveying belt and the conveying rack plate, each sealing wide pipe is of a U-shaped structure, and the two opening ends of each sealing wide pipe are fixedly connected with the two ends of a dust collecting pipe respectively. Through the design that the sealing wide pipe is additionally arranged, sealing and dustproof protection can be conducted on the joint of the conveying belt and the conveying machine frame plate; through detachable connection between the sealing wide pipe and the dust collecting pipe, the sealing wide pipe can be conveniently disassembled and assembled on the conveying m