Rotary tee valve

The utility model relates to a rotary tee pipe, which is suitable for the folding central drain pipe of an outer float top pot, and other similar devices, comprising a tee pipe. The positions of the opposite two hole openings are respectively provided with a rotary flange. A plurality of seal slots and a concave slot which forms into a semicircle section are arranged on the inner wall of the tee pipe. Seal rings are arranged in the seal slots. The semicircular concave slots are also arranged on the corresponding rotary flanges, so as to form into a circular concave slot. A steel ball which has the action of position limiting is arranged in the slot. The utility model ensures that the revolutions of the two rotary flanges can reach the requirement of the high axiality, so that the motion of a folding pipe is flexible, and avoids the oil leakage from damaging the seal ring at the early time.