A building drainage plastic riser with a spiral single blade

Abstract

The invention discloses a building drainage plastic vertical pipe with a spiral single blade. The building drainage plastic vertical pipe comprises a plastic vertical pipe body, wherein the inner wall of the plastic vertical pipe body is coaxially provided with the spiral single blade along the axis direction of the vertical pipe; the connection part of the root part of the spiral single blade and the inner wall of the plastic vertical pipe body is of a circular arc transition structure. According to the pipe, the connection part of the root part of the spiral single blade and the inner wall of the plastic vertical pipe body is of the circular arc transition structure; the curvature is reduced greatly (the curvature radius is increased); according to the fluid wall attachment effect theory, when water in the pipe falls off along the pipe wall, the water flow is adsorbed to the pipe wall and cannot be removed so as to form a good wall attachment water film fluidic state, so that the situation that the water flow moves toward the center of the vertical pipe to generate water cork flow is prevented; the fluctuation of pressure in the pipe is reduced; the water drainage flow rate within a certain pressure fluctuation range is improved; the alternative impact by the water flow to the pipe wall is also prevented, so that the pipeline vibration and drained water noise are buffered greatly.

Description

technical field [0001] The invention relates to the field of building drainage pipes, in particular to a building drainage plastic standpipe with a spiral single blade having special drainage performance (the advantages of large drainage capacity, small fluctuation of drainage pressure, low drainage noise, etc.). 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, formi...

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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. Construction drainage plastic riser with spiral single blade

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