Anti-blocking type swirling flow noise reduction joint

The utility model relates to a building drainage system pipe connecting piece, in particular to an anti-blocking type swirling flow noise reduction joint. The anti-blocking type swirling flow noise reduction joint comprises a joint body and three bell mouths, wherein the outer diameter of the joint body is larger than that of the three bell mouths, one end of the joint body is connected with one end of the first bell mouth through a bevel, the other end of the joint body is connected with one end of the second bell mouth through a funnel-shaped connector, swirling flow blades are arranged on the inner wall of the funnel-shaped connector, and the middle of the joint body is connected with one end of the third bell mouth through a third connector. The anti-blocking type swirling flow noise reduction joint further comprises a clearing port and an outer sealing cover, wherein one end of the clearing port is connected with the middle of the joint body through an arc, external threads are arranged at the other end of the clearing port, internal threads matched with the external threads are arranged in the outer sealing cover, and the outer sealing cover is in threaded connection with the other end of the clearing port. According to the anti-blocking type swirling flow noise reduction joint, due to the design of the clearing port, the problem that in the using process of the swirling flow noise reduction joint, various sundries block a pipe and cannot be cleared away and eliminated is solved, and normal water drainage of the swirling flow noise reduction joint is guaranteed.