A building drainage plastic riser with a spiral groove

Abstract

The invention discloses a building drainage plastic stack with spiral grooves. The plastic stack comprises a plastic stack body, wherein the inner wall of the plastic stack body is coaxially and circumferentially provided with a plurality of spiral grooves along the axis of the stack; the junctions of the groove bottoms of the spiral grooves and the groove walls and the junctions of notches of the spiral grooves and the inner wall of the plastic stack body are all of circular arc transition structures. The junctions of the groove bottoms of the spiral grooves and the groove walls and the junctions of the notches of the spiral grooves and the inner wall of the plastic stack body are all of the circular arc transition structures, so the spiral grooves are of the streamline-shaped arc structures with small curvature, namely large curvature radius; the situation that the water flow moves towards the center of the stack to produce water blockage is avoided according to the theory of a fluid wall attachment effect, the fluctuation of pressure in the stack is reduced, the drainage flow rate within a certain pressure fluctuation range is improved, alternate impact of the water flow to the stack is also avoided, and the pipeline vibration and the drainage noise are greatly reduced.

Description

technical field [0001] The invention relates to the field of building drainage pipes, in particular to a building drainage plastic standpipe with spiral grooves, which has the advantages of preventing floor drains and deodorizing, reducing water flow noise, and strong drainage capacity. Background technique [0002] Plastic pipe is a commonly used pipe for building drainage. However, because the inner wall of plastic pipe is smooth and the frictional resistance is small, when it is used for building drainage standpipe, the water flow velocity is relatively high. When the flow rate is slightly larger, it is easy to form water plug flow (water plug flow) : It means that when the building drainage riser is used for gravity drainage, when the flow rate is too large, the thickness of the water film attached to the pipe wall is too large, or the water flow is affected by the structure, the water flow forms a central water mass and falls in the pipe, forming a plug shape falling in ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for changing the falling water flow in the drainage standpipe in view of the deficiencies and defects of the existing internal spiral plastic drainage pipes, which are prone to pressure fluctuations, water seal damage, floor drain back odor, and noise increase when the displacement increases. Shape, reducing pressure fluctuations in the pipe during drainage, reducing the speed of falling water flow, avoiding water seal damage and toilet odor, reducing drainage noise, improving drainage capacity, etc. The building drainage plastic riser with spiral grooves

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