Urban road storm runoff desanding device

Abstract

The invention discloses an urban road storm runoff desanding device which is mainly used for removing sediment carried in urban road storm runoff. The device comprises four parts, namely a rainwater grate, an automatic mud locking device, a mud collecting well and an inclined plate outflow device, wherein the rainwater grate can utilize existing facilities locally and does not need to be manufactured additionally; the automatic mud locking device comprises a fixed hinged support and a lightweight floating plate; the mud collecting well is positioned at the bottom of the device and specially used for storing the collected sediment; and the inclined plate outflow device is an oblique water outlet channel which is oblique upward and can enhance the collection efficiency of the sediment. The device has the following advantages that: the application is convenient, the device can be directly arranged at the lower part of an existing rainwater port, the additional land occupation is not required and the status quo of a rainwater pipeline does not need to be changed; the collection efficiency of the sediment is high, thereby avoiding the loss of the sediment caused by water scouring and particularly improving the effect of removing the small granular sediment; and the sediment is convenient to clear and can be directly cleared along the way once through a fecal suction truck.

Description

technical field [0001] The invention belongs to the technical fields of urban environment planning and environmental protection, and in particular relates to source control of rainstorm runoff sediment 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 a large traffic load and occupy a large area, and the intensity of the non-point source pollution load is much greater than that of roofs, squares and other impermeable underlying surfaces. Therefore, it should be an important object of urban non-point source pollution control. A large number of studies have proved that pollutants such as organic matter, total phosphorus, and heavy metals have a good correlation with suspended particles. Therefore, efficient control of sediment can effectively reduce the pollution load of urban road storm runoff. [0003] The published lite...

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Problems solved by technology

Chinese patent document CN2863947Y " the primary rainwater interception system of controlling urban non-point source pollution " proposes although the initial stage rainwater interception method can reach better sediment retention function, but the system is too complicated; The gully with functional function” proposed a gully that can intercept solid pollutants, but the use of filter packing in the gully will face the problems of plugging and replacement of packing; Butler and Karunaratne studied the impact of roadside ditches on storm runoff sediment It was found that the sedimentation height of the bottom sediment has an important influence on the sediment replenishment efficiency (see: Butler D and Karunaratne S H P G. The Suspended Solids Trap Efficiency Of The Roadside Gully Pot[J]. War. Res., 1995,29(2): 719-729)

[0006] The geographical environment of urban road storm water outlets is complex and diverse. If there are too many requirements for sand removal technology, it will not be conducive to the promotion of technology. The new sand removal technology should be simple in structure and extensive in management

[0007] (2) The impact of water flow has a certain impact on the efficiency of sediment replenishment, which may easily cause the loss of silt;

[0008]The scouring of the bottom sediment or the filtered and retained sediment by the water flow may cause the loss of the sediment, thereby reducing the sand removal efficiency. It is necessary to seek a more reasonable interception structure to avoid supplementary Re-loss of aggregated particles

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