Large-flow anti-return and anti-overflow double-stand pipe drainage pipe fitting

Abstract

The invention relates to the field of drainage pipe fittings, in particular to a large-flow anti-return and anti-overflow double-stand pipe drainage pipe fitting. The large-flow anti-return and anti-overflow double-stand pipe drainage pipe fitting comprises a drainage stand pipe and a ventilation stand pipe, wherein the drainage stand pipe is provided with one or multiple transverse branch pipe connectors; a connecting sleeve which extends downwards and has the diameter less than the diameter of the drainage stand pipe is arranged in the drainage stand pipe; a connecting pipe is arranged between the drainage stand pipe and the ventilation stand pipe and are interconnected to the drainage stand pipe and the ventilation stand pipe; and the lower end of the connecting sleeve is lower than theconnecting pipe. Sewage is prevented from splashing into the ventilation stand pipe through the connecting sleeve which has the diameter less than the diameter of the ventilation stand pipe and is lower than the lower end of the connecting pipe. The large-flow anti-return and anti-overflow double-stand pipe drainage pipe fitting has the beneficial effects of simple structure, anti-return, anti-overflow, air pressure stabilization, and smooth drainage.

Description

technical field [0001] The invention relates to the field of drainage pipe fittings, in particular to a large flow anti-backflow double riser drainage pipe fitting. Background technique [0002] In our country, designers will choose different building drainage systems according to the type of building and the height of the building. The drainage system with special ventilation riser or double riser drainage system is the most widely used in high-rise and super high-rise buildings. It is characterized in that a special ventilation riser is arranged side by side with the drainage riser, and an H ventilation pipe fitting is installed on each floor or compartment, so that the drainage riser is connected with the special ventilation riser. This kind of system can relieve and balance the pressure fluctuations in the drainage standpipe during the drainage process, and prevent the phenomenon of back odor in the bathroom caused by the damage of the water seal on the horizontal branc...

AI Technical Summary

Problems solved by technology

[0004] During the drainage process of the drainage assembly in the prior art, if the water flow of the waste water connection pipe is too large, part of the water flow will enter the ventilation riser body and pollute the ventilation riser body, and the water flow at the interface of the drainage horizontal branch pipe will hit the channel, which will affect the water discharge effect of the channel, resulting in poor water discharge. Therefore, the drainage assembly has problems such as poor drainage of the connecting body, easy flow of water into the ventilation riser body, and complex structure.

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