Swirler pipe fitting of drainage system of special single vertical pipe

The invention discloses a swirler pipe fitting of a drainage system of a special single vertical pipe. The swirler pipe fitting comprises a vertical pipe, a horizontal branch pipe and a swirling blade, and further comprises an embedded guide pipe, wherein the swirling blade is arranged on the inner wall of the vertical pipe; the embedded guide pipe is embedded into the interior of the vertical pipe; the bottom of the embedded guide pipe extends to a position at the opening of the horizontal branch pipe; a water film opening device is arranged on the outer wall of the embedded guide pipe. The swirler pipe fitting provided by the invention has the advantages that the design of the embedded guide pipe can enable swirling water flow flowing downwards at the upper layer to bypass the horizontal branch pipe and flow downwards smoothly, so that the swirling water flowing downwards in the upper part of the vertical pipe is prevented from being 'threw' into the horizontal branch pipe due to centrifugal force, and the air pressure fluctuation in the vertical pipe is eliminated and the noise generated during draining the water is reduced; according to the design of the water film opening device, a water film can be opened at the connecting opening of the horizontal branch pipe, and an air passage between the horizontal branch pipe and the vertical pipe can be kept to be smooth, so that the relative equilibrium of the air pressure can be ensured, the air pressure fluctuation in the vertical pipe can be eliminated, the stability and the non-damage of water sealing of a sanitary ware can be realized, and non foreign odor can be achieved.