A reservoir pre-discharge and ecological flow discharge structure

Abstract

The invention discloses a structure integrating reservoir pre-discharging and ecological flow discharging. The structure comprises a flow guide hole, a communicating pipe and a vertical shaft which is vertically arranged. The reservoir communicates with the flow guide hole through the vertical shaft. The communicating pipe is attached to the inner wall of the vertical shaft and extends to an outlet of the flow guide hole. The elevation of an inlet of the communicating pipe is lower than a normal water storage level of the reservoir and is higher than a dead water level of the reservoir. A stilling pool is arranged at an outlet of the communicating pipe. A blocking body is arranged at the outer portion of the part, in the flow guide hole, of the communicating pipe. A first valve controlling the communicating pipe to be opened and closed is arranged at the tail end of the blocking body. A second valve used for adjusting the flow of the communicating pipe is arranged at the tail end of the communicating pipe. By means of the structure integrating reservoir pre-discharging and ecological flow discharging, floods needing pre-discharging in the reservoir or ecological flow are discharged to the downstream part in time and in order. Compared with a common pre-discharging facility bottom hole discharging hole, the structure integrating reservoir pre-discharging and ecological flow discharging is simple in construction structure, economical in construction cost and convenient to maintain, good technical economy popularization value is achieved on a project which is small in rain collecting area and needs to be provided with a pre-discharging facility, and the structure is suitable for the reservoir high in reservoir slit elevation.

Description

technical field [0001] The invention belongs to the technical field of hydropower and water conservancy engineering construction, and in particular relates to a reservoir pre-discharge and ecological flow discharge structure. Background technique [0002] The lower reservoir of the pumped storage power station is low-lying and has a lot of natural inflow or runoff, so it is generally necessary to set up drainage structures. When the rainwater collection area of ​​the reservoir is small but the consequences of engineering accidents are serious, in order to ensure the safe operation of the reservoir and from the technical and economic point of view, open spillways without gates are generally still installed as emergency flood discharge facilities. Since the open spillway without gates can only discharge floods higher than the normal water storage level, and the power generation flow of the upper reservoir and the natural inflow flood of the lower reservoir are superimposed dur...

AI Technical Summary

Problems solved by technology

Due to the construction of the reservoir dam, it forms a barrier to the natural river, and it is generally necessary to set up a separate ecological flow discharge facility to meet the daily discharge requirements of the downstream ecological flow, which further increases the project investment.

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