Suction pipe section

The utility model relates to a suction pipe section, in particular to a suction pipe section used for conveying waste gas in the field of acyl chloride production. The suction pipe section comprises a pipe body and flange plates located at two ends of the pipe body. The pipe body comprises an outer pipe and an inner pipe. A first suction opening is formed in the outer pipe. A second suction opening is formed in the inner pipe. A one-way partition formed by a film covering piece is disposed between the first suction opening and the second suction opening. The suction pipe section has the advantages that the pipe section formed by a bush structure is used to replace a flange plate used in the prior art to serve as the connecting part of pipes; by the suction openings, conveying of gas inside a pipeline can be pushed, people can step out of the inertia thought that conveying pressure needs to be increased to achieve long-distance conveying in the prior art, and the front pulling and rear pushing manner in the pr