Pretreatment road rainwater inlet system

Abstract

The invention discloses a pretreatment road rainwater inlet system. The system comprises a rainwater inlet, a sedimentation device, an intermediate filter tank, an overflow pool and a rain water inletconnecting pipe; a rainwater grate A is laid on the top of the rainwater inlet, and the rainwater inlet is communicated with the lower end of a diversion pipe which is arranged obliquely, and the upper end of the diversion pipe is communicated with the intermediate filter tank; the sedimentation device is installed in the diversion pipe; the intermediate filter tank is connected with an overflowport through an overflow plate, and the overflow port is communicated with a municipal drainage pipeline through a pipeline; a rainwater grate B covers the top of the overflow port. The system has theadvantages that initial runoff rainwater is pretreated by means of the sedimentation device and the like, sediment at the rainwater inlet does not enter the drainage pipeline along with rainwater runoff but precipitates in the precipitation area, the influent water quality of the intermediate filter tank is guaranteed, the pollution load of facilities is reduced, the whole system can run in a stable environment, the cleaning cycle of the facilities is prolonged, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical fields of municipal drainage technology and sponge city construction, in particular to a pretreatment road storm water outlet system. Background technique [0002] With the continuous deepening of urbanization, the proportion of natural underlying surface hardening has increased year by year. Urban rainwater problems are becoming more and more serious, mainly including frequent floods, serious non-point source pollution, and deterioration of water quality in adjacent water systems. The modern drainage network system based on rapid drainage prevents the infiltration and storage of precipitation, resulting in serious water resources. waste. Therefore, in response to the above three problems, the sponge city low-impact development concept in recent years has proposed a comprehensive and systematic solution. Among them, the non-point source pollution control rate in the water environment has become a mandatory assess...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a sewage pretreatment road gully system to solve the problems of low reuse rate of the original road gully in the prior art and blockage of pipes by debris in rainwater in the prior art.

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