Pipe body connecting structure, engine and automobile

The utility model discloses a pipe body connecting structure, an engine and an automobile, the pipe body connecting structure comprises a first pipe body, a second pipe body, a sealing ring and a hoop, the opening end of the first pipe body is provided with a special-shaped groove; the second pipe body is nested in the open end of the first pipe body; the sealing ring is clamped between the first pipe body and the second pipe body, a limiting bolt is arranged on the outer wall of the sealing ring, and the limiting bolt is connected with the special-shaped groove in a clamped mode; the hoop is arranged on the outer wall of the opening end of the first pipe body in a sleeving mode so that the first pipe body, the sealing ring and the second pipe body can be fixed together. According to the technical scheme, the compactness of the pipe body connecting structure can be improved. 本实用新型公开一种管体连接结构、发动机和汽车，其中，管体连接结构包括第一管体、第二管体、密封圈和卡箍，所述第一管体的开口端设有异形槽；所述第二管体嵌套于所述第一管体的开口端内；所述密封圈被夹持在所述第一管体和所述第二管体之间，所述密封圈的外壁设有限位栓，所述限位栓与所述异