Combined system underground initial rainwater storage tank

Abstract

The invention discloses a combined system underground initial rainwater storage tank. The storage tank comprises a natural water drain unit and a buffering storage unit which are arranged in the water flow direction and communicated. The natural water drain unit comprises a first buffering tank and a first automatic water power gate arranged in the first buffering tank and normally closed. A water inlet pipe is arranged on the upstream of the first automatic water power gate in the first buffering tank, and a natural water drain opening is formed in the downstream of the first automatic water power gate. The buffering storage unit comprises a second buffering tank communicated with the first buffering tank and an underground storage tank. The second buffering tank and the underground storage tank are communicated through a second automatic water power gate normally closed. On the premise of ensuring the maximum treatment capacity of a sewage treatment plant, initial rainwater is collected into the storage tank, later-stage rainwater is drained to natural water, pollution caused by direct drainage of the initial rainwater and overflow pollution can be effectively prevented, and the initial rainwater storage tank is simple in structure, low in cost, and capable of being controlled automatically without manual operation, and stores the rainwater safely and reliably.

Description

technical field [0001] The invention relates to a drainage system, in particular to a combined underground primary rainwater storage tank. Background technique [0002] With the continuous acceleration of the urbanization process and the influence of human activities, the urban impermeable area has increased significantly, which has greatly affected the natural hydrological cycle process, the surface runoff and peak flow have increased significantly, and the peak time has occurred earlier. The cycle is destroyed, the risk of urban flooding increases, and a large number of combined system overflow events emerge. Especially in my country, in recent years, heavy rains have caused drainage pipe network overflow events to occur continuously, and combined system overflow pollution has brought serious damage to water bodies. Pollution has seriously affected the lives of residents and brought huge economic losses. [0003] After the initial rainwater scours the air and the surface, i...

AI Technical Summary

Problems solved by technology

[0002] With the continuous acceleration of the urbanization process and the influence of human activities, the urban impermeable area has increased significantly, which has greatly affected the natural hydrological cycle process, the surface runoff and peak flow have increased significantly, and the peak time has occurred earlier. The cycle is destroyed, the risk of urban flooding increases, and a large number of combined system overflow events emerge. Especially in my country, in recent years, heavy rains have caused drainage pipe network overflow events to occur continuously, and combined system overflow pollution has brought serious damage to water bodies. Pollution has seriously affected the lives of residents and brought huge economic losses

[0003] After the initial rainwater washes the air and the ground, it will carry a large amount of toxic and harmful substances. If the initial rainwater is discharged directly without treatment, the water body will be seriously polluted

Although the combined drainage system can treat part of the sewage, most of the mixed sewage is discharged directly without treatment in rainy days, and becomes a pollution source of the receiving water body, causing it to be polluted

If a large amount of pollutants in the combined overflow sewage are discharged directly into the receiving water body without treatment, it will not only directly affect the water quality of the receiving water body, but may also cause eutrophication of the water body and damage the aquatic ecosystem.

Although the drainage system of new urban areas in my country adopts the rain and sewage separation system, many old urban areas still use the rain and sewage combined system.

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