Municipal drainage system

Abstract

The invention discloses a municipal drainage system, and belongs to the technical field of urban water supply and drainage. The municipal drainage system comprises a main drainage pipe, a sewer pipeline and a maintenance pipeline, wherein a rain grate is arranged at the upper end of the sewer pipeline; a well lid is arranged at the upper end of the maintenance pipeline; two hinge seats are arranged at the bottom of the well lid; an L-shaped hook is hinged to each hinge seat; a connecting rod is connected between the two hooks in a sleeving manner; lantern rings are fixed at the two ends of theconnecting rod; the lantern rings at the two ends are arranged on the two hooks in a sleeving manner correspondingly; a circular ring is fixed in the middle of the connecting rod; an ejector rod penetrates through the circular ring; a floating ball is fixed at the bottom of the ejector rod; in addition, a limiting ring is fixed on the inner wall of the maintenance pipeline; an impurity removal mechanism and a water return prevention mechanism are arranged in the sewer pipeline. According to the municipal drainage system, the potential safety hazard caused by the fact that the well lid is opened by flushing during rainwater backflow can be prevented; and in addition, the impurity removal mechanism can effectively reduce sediments in the main drainage pipe, reduce the dredging frequency andsave the labor cost; the water return prevention mechanism can prevent rainwater backflow at a low-lying position and prevent water accumulation on a road surface.

Description

technical field [0001] The invention relates to the technical field of municipal water supply and drainage, in particular to a municipal drainage system. Background technique [0002] At present, in the design of municipal water supply and drainage, the municipal drainage system is divided into three types: one is the combined system that discharges rainwater, domestic sewage and industrial wastewater in one pipeline; The diversion system for discharge from one or more than two pipelines, the third is the interception and confluence system, that is, the construction of the interception main pipe, and the overflow well is set at the interception point; generally the old urban area adopts the interception and confluence system, while the new urban area mostly adopts the diversion system, that is, Rainwater and sewage are discharged in separate pipes; as we all know, sewage needs to meet the expected indicators before it can be discharged. In the combined system, rainwater and ...

AI Technical Summary

Problems solved by technology

[0003] The first is the manhole cover at the maintenance pipeline. When the rain is heavy in the rainy season, the manhole cover at a relatively low terrain is very easy to backwater, causing overflow and the manhole cover jacking up. It is not suitable for pedestrians and vehicles to observe and fall into the maintenance pipeline. Due to the large amount of water in the pipeline The water flow is fast, causing great losses; in the prior art, a Chinese invention patent for a municipal road manhole cover (CN106592643B) discloses a manhole cover, which can float up when there is heavy rainfall or flood, and will not float away when it floats up , to protect the safety of pedestrians; although it solves the safety problem to a certain extent, it ignores the role of the maintenance port, the design structure is complicated, and it is difficult for personnel to go down into the main pipeline for operation. The raised manhole cover acts as an obstacle, causing a safety hazard

[0004] The second is the rain grate at the sewer pipe, which is a grate plate with a simple long hole hollowed out. The sundries on the road, such as fallen leaves, waste paper, plastic and other solid waste, can easily enter the sewer pipe with rainwater, causing major damage. The pipeline is blocked; in addition, when the rainwater is large, the rain grate at the relatively low place is very easy to reverse the water, aggravating the level of water in the road area and causing danger; in the prior art, a Chinese utility model patent has a rain grate with a culvert box ( CN208251294U), its rain grate below is provided with two-layer filter culvert box, by two-layer filter, avoids sewer blockage to the greatest extent, alleviates work burden to sanitation worker; Its weak point is that filter culvert box volume is limited, and sundry is too much If it is not cleaned in time, it will block the rain grate, which is not conducive to drainage, and there is no anti-backwater device

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