A rainwater abandonment method and device based on fluid mechanics and leverage principle

Abstract

The invention discloses a rainwater discarding method and a rainwater discarding device based on the hydromechanics and the lever principle. A rainwater discarding well comprises a discarding pipe, a water inlet pipe and a water collecting pipe which are sequentially arranged upwards from the well bottom; a control valve comprises a balancing weight and a hollow valve plate; the hollow valve plate is positioned on the pipe orifice of the discarding pipe and can be lifted up and down vertically; the balancing weight and the hollow valve plate are positioned on the two sides of a fixed pulley respectively and are connected with each other; a water inlet hole is formed in the top of the hollow valve plate, and a water drain hole is formed in the bottom of the hollow valve plate; and the water inlet pipe and the water inlet hole are connected through a well wall flow guide pipe. According to the method and the device, based on the fact that different areas have different demands for discarding time, the water amount entering the hollow valve plate is regulated, thus the lifting up and down of the hollow valve plate is controlled, therefore, the purpose of discarding but not storing the initial rainwater is achieved, so that the after-treatment difficulty and cost are reduced, and the service life of a water storage pool is prolonged; in addition, the structure is simple, only a few transmission parts are adopted, and the measurement and control as well as electric actuating mechanisms are not needed, therefore, the failure rate is extremely low, the overhaul is convenient, and the municipal rainwater collection under any condition can be realized.

Description

technical field [0001] The invention belongs to the technical field of initial rainwater pollution control, and in particular relates to a rainwater abandonment method and device based on fluid mechanics and leverage principles. Background technique [0002] The development of my country's sponge city construction. The requirements for building a sponge city with natural accumulation, natural infiltration and natural purification are put forward. The Ministry of Housing and Urban-Rural Development issued the "Technical Guidelines for Sponge City Construction" and the promulgation of various rainwater utilization specifications. The collection and utilization must be realized as soon as possible to improve the natural ecological background and hydrological characteristics of the city, so that it will not be flooded when it rains, and it will not be dry when it is drought. Car wash, reclaimed water source, etc. [0003] Nowadays, to collect a large amount of rainwater, it i...

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Problems solved by technology

[0003] Nowadays, to collect a large amount of rainwater, it is necessary to build a large-volume storage tank, which requires high investment, maintenance and management in many aspects, and the biggest problem is the problem of sedimentation and siltation in the tank. If this problem cannot be solved, it will cost a lot of money The storage tanks built with capital will be silted up after a short period of time, resulting in a reduction in volume, or even being scrapped due to silt filling, causing a lot of waste, which will paralyze the rainwater collection system, and ultimately affect the construction of the sponge city.

[0004] The main reason for the formation of pool siltation is that the water containing floor drain sediments at the initial stage of heavy rain flows into the reservoir without relevant treatment. Therefore, the rainwater at the initial stage of the storm must be intercepted outside the reservoir, discarded and discharged into the reservoir. In the municipal pipe network or natural water body, reduce the difficulty and cost of post-processing, prolong the service life of the reservoir, and at the same time, the collection time cannot be discarded for a long time, so that the amount of rainwater collected cannot meet the requirements

In addition, it is necessary to collect the clean rainwater in the later stage into the storage tank, so that a large amount of rainwater resources will not be wasted in vain, so that the requirements for storage in the sponge city cannot be realized.

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