Inner flange connecting structure for corrugated steel pipe

The utility model relates to the technical field of corrugated steel pipe connection, in particular to an inner flange connection structure for a corrugated steel pipe. The technical problems that in the corrugated pipe connecting process, due to the fact that the workload of corrugated pipe cutting and welding is large, welding between a corrugated steel pipe and a flange is prone to being untidy, and consequently gaps are uneven in the butt joint process, and meanwhile due to the fact that the flange and the corrugated steel plate are of a welding structure, when the flange makes contact with external uneven stress, welding seams crack are caused are solved. According to the technical scheme, the inner flange connecting structure for the corrugated steel pipe comprises a corrugated pipe assembly, an adapter assembly, a first flange assembly, a second flange assembly, a buffering assembly and a fixing assembly; compared with a traditional mode that the corrugated pipe and the flange are welded, the corrugate