A rain downpipe with an inner helical structure

Abstract

The invention discloses a down pipe with an internal spiral structure, comprising a pipe body.The top of the pipe body is provided with an inlet filter ring, and a drain grille is disposed between the inlet filter ring and the pipe body; the inner wall of the pipe body is provided with a spiral slow discharge passage, the inner diameter of the spiral slow discharge passage on a horizontal projection is less than the inner diameter of the inlet filter ring, and an inner surface of the spiral slow discharge passage forms a cylindrical space in an enclosing manner, that is a central quick discharge pipe.The problem that a traditional down pipe focuses only on acceleration of water discharge and never focuses on excessively quick urban drainage flow, the moving time of a roof rainwater runoff in the down pipe can be effectively prolonged so that the speed of the roof runoffs gather to a municipal network is decreased, a peak value of a zonal rainwater gathering process can be reduced, and urban network drainage pressure is effectively relieved by prolonging the gathering time so that the chance of 'sea occurring in a city' is slimmed.

Description

technical field [0001] The invention relates to a rain downpipe in construction engineering, in particular to a rain downpipe with an inner spiral structure. Background technique [0002] Facing the increasingly serious urban waterlogging problem, the methods and theories of sponge cities, which are dedicated to improving urban water security and improving the water environment, have received unprecedented attention in China and have entered a stage of active development and application. Analyzing the generation mechanism of urban rainwater runoff, we can know that the runoff of building roofs accounts for a large proportion of the total urban runoff, especially in large and medium-sized cities, due to the extremely high construction density, the runoff of building roofs cannot be underestimated. [0003] Traditionally, in order to avoid leakage caused by poor drainage on the roof of the building, the main goal of the rainwater pipe is to quickly discharge and discharge. How...

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Problems solved by technology

[0003] Traditionally, in order to avoid leakage caused by poor drainage on the roof of the building, the main goal of the rainwater pipe is to quickly discharge and discharge. However, this drainage method speeds up the time for the roof runoff to enter the municipal pipe network. It has brought greater pressure on urban flood control and drainage, and has become one of the main causes of urban waterlogging.

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