Energy dissipation and flow control device for discharging ecological flow and gate water filling and pressure balancing

Abstract

The invention discloses an energy dissipation and flow control device for discharging ecological flow and gate water filling and pressure balancing, which comprises a drainage hole (hole) flow channel, an ecological flow discharging main pipeline device arranged on an arc-shaped service gate hoist operation room platform and a water filling and pressure balancing pipeline device arranged at the lower part of the arc-shaped service gate hoist operation room platform, the ecological flow discharging device is provided with an energy dissipation vertical pipe device and a force dissipation vertical shaft for energy dissipation, symmetrical flow outlets are formed in the tail end of a water discharging pipeline of the ecological flow discharging device or a plunge pool is arranged under an outlet in the middle of the tail end of the ecological flow discharging device, and symmetrical flow outlets are formed in the tail end of a flat pressing pipeline of the water filling flat pressing pipeline device. According to the ecological flow discharging main pipeline device and the water filling and pressure discharging pipeline device arranged on the lower portion of the ecological flow discharging main pipeline device, each pipeline is provided with a corresponding water discharging valve to control the flow, the dual-purpose requirements of ecological flow discharging and gate water filling and pressure discharging are met, the flow speed of discharged water is greatly reduced after multiple times of energy dissipation, and the energy consumption is reduced. And the impact effect on the flow channel of the drain hole (hole) is small, so that the safety of the flow channel of the drain hole (hole) is guaranteed.

Description

technical field [0001] The invention relates to the technical field of metal structures of water conservancy and hydropower projects, in particular to an energy dissipation and flow control device for discharging ecological flow and filling hydraulic pressure of gates. Background technique [0002] At present, for high dam hydropower projects, during the operation period, the decentralized flow generated by the generating units is mainly used to meet the downstream ecological needs. The arc-shaped working gates set in holes, overflow dam surface holes, flood discharge middle holes, flood discharge tunnels, vent holes, and vent bottom holes are partially opened to release ecological flow. Due to the large discharge capacity of high-dam hydropower projects, such as Dongqing, Guangzhao and Mamaya in Beipan River, Silin, Shatuo and Goupitan in Wujiang River, Nuozhadu and Xiaowan in Lancang River, etc., the flood discharge scale usually reaches 10,000m 3 / s or more, this will le...

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Problems solved by technology

[0003] Based on the safety requirements of project operation, the arc-shaped working gate should avoid the vibration area during operation, so the gate opening is usually larger than the required opening. Therefore, the arc-shaped working gate has poor discharge control ability, and the discharge flow will exceed the required ecological The flow rate is large, resulting in a waste of water energy; and the motor power of the gate opening and closing equipment is large, the energy consumption is high, and the energy saving effect is poor

If the project uses a special ecological water discharge tunnel to discharge the flow, because the size of the ecological water discharge tunnel is usually long and the investment is large, and when the discharge valve operates at a very high water head, the outlet flow rate is relatively high, usually up to 15m / s or more, then There are also problems such as severe erosion of the tunnel by high-speed water flow; in addition, for the deep-hole accident gate of the drainage system, the water filling valve on the top of the gate is used for flat pressure, and there is strong vibration when the water filling valve closes under high-speed water flow, and the water flow at the outlet of the water filling valve The impact on the bottom sill of the gate is relatively large, and it is easy to be damaged by washing, and there are problems such as poor closure due to foreign matter interference, serious water leakage, etc.

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