Improvement structure of tuber pipe

The utility model provides an improvement structure of tuber pipe, is equipped with the body of bending, and the both ends of body are equipped with opening's trompil, and the fold section into continuous fold is established to the inboard of body, and each fold of this fold section is mutual superpose, and these fold upwards extend to neighbouring body outside department to forming inboard part,dark and the part in the outside is more shallow, and be a plurality of chases of different crookedness. When making, the degree of depth that can set for predetermined crookedness and calculate goodinboard chase directly completes, and need through twice procedure in order reducing the operating cost, and because of the design of fold section makes the internal face of body comparatively level and smooth, the resistance that consequently receives during in the process in the fluid is smaller, and then can improve the velocity of flow. 种风管的改良结构，设有弯形的管体，管体的两端设有开放状的开孔，管体的内侧设为连续皱折的皱折段，该皱折段的每皱折呈相互的叠置，这些皱折向上延伸至邻近管体外侧处，以形成内