Sediment transport device

Abstract

The invention relates to a sediment transport device and belongs to the field of hydraulic engineering. According to the sediment transport device, a sediment trap is arranged on the whole front edge of a water inlet of a power station. A sediment transport gallery is arranged in front of the sediment trap and connected with a dam foundation sediment discharge tunnel. A horizontal joint sediment discharge opening is arranged in the top of the sediment transport gallery. The width of the horizontal joint sediment discharge opening gradually becomes smaller from the upstream part. The cross section of the sediment transport gallery gradually becomes larger from the upstream part. The sediment trap is used in cooperation with the widening and joint-narrowing type sediment transport gallery to achieve the function of a sediment stopping groove, a long-strip-shaped erosion funnel can be formed in front of the sediment trap, and the sediment discharge effect of removing sediment in front of the water inlet of the power station is truly achieved.

Description

Technical field: [0001] The invention relates to a technique for removing coarse-grained sediment from a water inlet of a hydropower station, in particular to a technique for discharging sand using variable-width and narrow-slit sand-discharging corridors of unequal width, which belongs to the field of water conservancy engineering. The IPC international patent classification number is E02B9 / 00, E02B9 / 04, E02B1 / 00. Background technique: [0002] On sandy rivers, the destructive effect of sediment wear on turbines is very serious. For high water head projects, setting up sand discharge bottom holes or flood discharge and sand discharge holes is an effective measure to reduce the passage of coarse sand. The sand discharge bottom hole is generally arranged at the lower part of the water inlet of the power station, and the flood discharge is used to form a scour funnel in front of the water inlet of the power station to reduce the flow of coarse sand. For low-head riverbed hu...

AI Technical Summary

Problems solved by technology

For low-head riverbed hubs, it is difficult to arrange the sand discharge bottom holes at the lower part of the water inlet of the power station. They are arranged on both sides of the water inlet of the power station. The scope of the scour funnel is small, and it is difficult to achieve the ideal sand discharge effect.

In addition, the front edge of the water inlet of this type of power station is generally relatively long, and a single sand discharge hole cannot achieve its purpose at all, and it is difficult to arrange multiple sand discharge holes along the front edge of the water inlet.

The Bapanxia Hydropower Station set up equal-width gaps to discharge sand on the top of the corridor on the bottom plate of the inlet section of the power station. The operation results show that the flow rate at the gate is small, the flow capacity of the sand-drawing hole is small, the sand-drawing range is not large, and it is easy to generate sand in the corridor. clogging

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