Improved device for removing sand in urban road storm flow

Abstract

The invention discloses an improved device for controlling sand in urban road storm flow, mainly for removing the sand carried by the urban road storm flow and particularly capable of removing small-particle sand effectively. The improved device comprises a rainwater grate (1), a flow baffle (2), a sand storage well (3) and a filtering layer (4), wherein the existing facility can serve as the rainwater grate (1), additional manufacture of the rainwater grate (1) is not needed, the flow baffle (2) has a 45-degree inclination, the sand storage well (3) is positioned at the bottom of the device and used for storing collected sand, and the filtering layer (4) is 0.5m deep, comprises gravels / cobblestones with 20mm-40mm grain sizes and is used for strengthening removal of micro particles. The improved device has the advantages that the improved device is convenient to use and capable of being arranged at the lower portion of the existing gutter inlet directly, no additional land occupation is needed, the current situation of rainwater pipelines does not need to be changed, sand collection efficiency is high, compared with the existing device, collection efficiency of fine sand is increased remarkably, sand can be cleared away by a fecal suction truck along the pipelines for one time directly and conveniently, and back wash can be performed by the filtering layer automatically and synchronously.

Description

technical field [0001] The patent of the invention belongs to the technical field of urban environmental planning and environmental protection, and specifically relates to the source / transmission process control of rainstorm runoff mud and sand on urban roads. Background technique [0002] Urban non-point source pollution caused by urban storm runoff has become one of the main reasons for the deterioration of urban water quality. Urban roads have heavy traffic loads and occupy a large area. The intensity of non-point source pollution load is much greater than that of impermeable underlying surfaces such as roofs and squares. It has become the main contributor to urban rainstorm runoff pollution (Wang Shumin. Time and Space of Non-point Source Pollution in Mountainous Cities Research on distribution characteristics [D]. Chongqing: Chongqing University, 2012); at the same time, studies have proved that solid form is the main form of pollutants such as organic matter, phosphoru...

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Problems solved by technology

[0003] The applicant found in the research work that the removal rate of mud and sand in storm runoff can be improved by improving the structure of the sand removal well (patent "a device for source control of mud and sand in storm runoff from urban roads" (CN202416537U)), and also found that, Although the patent granted by the applicant has greatly improved the removal efficiency of urban storm runoff sediment, the degree of removal of fine particles needs to be further improved

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