A building drainage plastic riser with spiral ribs

Abstract

The invention discloses a building drainage plastic stack with spiral ribs. 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 ribs along the axis of the stack; the top surfaces of the spiral ribs are curved surfaces; junctions of the root parts of the spiral ribs and the inner wall of the plastic stack body are of circular arc transition structures. The top surfaces of the spiral ribs are curved surfaces, the curvature is greatly reduced (the curvature radius is increased), the situation that a 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 pipe is reduced, the drainage flow rate within a certain pressure fluctuation range is improved, alternate impact of the water flow to the pipe 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 ribs, which has the advantages of preventing floor drains, 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 the pi...

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Problems solved by technology

[0005] The purpose of the present invention is to solve 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, by changing the existing internal spiral plastic drainage pipes The shape of the spiral rib structure provides a way to change the shape of the falling water flow in the drainage standpipe, reduce the pressure fluctuation in the pipe during drainage, reduce the speed of the falling water flow, avoid water seal damage and toilet odor, reduce drainage noise, and improve drainage capacity. Building drainage plastic riser with spiral ribs

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