Waterlogging preventing method and system thereof for realizing orderly water drainage in cities

Abstract

The invention discloses a waterlogging preventing method and a system thereof for realizing the orderly water drainage in cities. The waterlogging preventing method is that water flow spiral movement generating devices are mounted at water outlets of water collecting wells of underground pipe networks, and the vortex generating coefficient of the water flow spiral movement generating device which is mounted at the water outlet of the water collecting well at a high position is higher than that of the water flow spiral movement generating device which is mounted at the water outlet of the water collecting well at a high position. The system of the waterlogging preventing method for realizing the orderly water drainage in the cities comprises underground pipe networks for cities, and water collecting wells which are communicated with the underground pipe networks, wherein water flow spiral movement generating devices are mounted at the water outlets of the water collecting wells; the water flow spiral movement generating devices are volute casings, or casing structures which are provided with tangential water inlets, axial water outlets and hollow inner cavities and are in circular truncated cone shapes, cylindrical shapes, inclined circular truncated cone shapes or inclined cylindrical shapes. The method and the system thereof can be used for effectively reducing the equivalent flow passing area of pipelines at the water outlets of the water collecting wells at high-elevation regions and the water flow speed of the inner parts of the pipelines.

Description

technical field [0001] The invention relates to a waterlogging prevention method and system for realizing orderly drainage of cities. Background technique [0002] In the urban drainage system, the terrain differences in different regions significantly affect the drainage capacity of the drainage pipes in the corresponding region and the drainage effect in heavy rainfall. According to the relevant theories of fluid mechanics, under the action of the head pressure, the water flow rate in the pipeline increases with the increase of the head pressure. Therefore, when all the drainage pipes have the same pipe diameter, the pipes have a stronger drainage capacity due to the higher head pressure in the high-lying area. Quickly drain away; in low-lying areas, the head pressure is low, and the drainage capacity of the pipeline is relatively weak, so it is difficult to drain away rainwater in time and a large amount of rainwater is stagnated. At present, the layout of my country's ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing drainage methods cannot effectively limit the rainwater discharge speed in high terrain areas and easily cause waterlogging disasters in low terrain areas when the city encounters heavy rainfall, the present invention provides a method that can effectively limit the rainwater discharge speed in high terrain areas. Waterlogging prevention method and system for achieving priority discharge in low-lying areas and realizing orderly drainage of cities

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