Assembled exhaust pipeline for multi-storey residential building

The utility model discloses an assembled exhaust duct for a multi-storey residential building, which comprises a first exhaust pipe, and the lower part of the first exhaust pipe is connected with a second exhaust pipe through a first screw rod and a first nut; the connecting discs are respectively welded at the end part of the first exhaust pipe and the end part of the second exhaust pipe; the auxiliary plates are welded to the front side and the rear side of the first exhaust pipe and the front side and the rear side of the second exhaust pipe correspondingly. The lateral blocks are mounted on the side surfaces of the auxiliary plates through bolts; the additional connecting screw rod is connected between the upper lateral block and the lower lateral block through a second nut; the detection pipes are arranged on the side face of the first exhaust pipe and the side face of the second exhaust pipe correspondingly. Through the arrangement of the lateral block and the additional connecting screw rod, the stabil