A normal surface funnel reservoir sediment discharge device

Abstract

The invention discloses a sand discharge device for a reservoir based on a normal curved funnel, which belongs to the technical field of water conservancy engineering. The device includes a sand inlet funnel and a sand delivery pipeline; The pipeline is laid on the river bed of the reservoir, the bottom of the sand inlet funnel is connected to one end of the sand delivery pipeline, and the other end of the sand delivery pipeline passes through the bottom of the dam; the shape of the sand inlet funnel is a bivariate normal curved surface , the shape of the sand transport pipeline is an inverse hyperbolic tangent curve, and a valve is arranged on the sand transport pipeline. When the device is in operation, the valve on the sand delivery pipeline is opened, and under the action of water pressure in the reservoir, the water flow carries the sediment through the sand discharge pipeline and is discharged into the downstream of the reservoir. The normal surface shape of the sand inlet funnel and the hyperbolic tangent shape of the sand delivery pipeline can effectively solve the problem of easy silting in the sand inlet and pipeline, and significantly improve the sand discharge efficiency.

Description

technical field [0001] The invention belongs to the technical field of operation management of water conservancy projects, and in particular relates to a sand discharge device for a funnel reservoir with a normal curved surface. Background technique [0002] After the reservoir dam is built on the river course, as the reservoir impounds water, sedimentation occurs in the reservoir area. After the siltation occurs in the reservoir, it not only reduces the storage capacity of the reservoir but also affects the shipping in the reservoir area, resulting in a decrease in the overall benefit of the reservoir. Therefore, the problem of reservoir sedimentation is a major issue to be solved urgently in water conservancy projects. [0003] Reservoir sediment discharge is an important part of solving the problem of reservoir sedimentation, and it has great practical significance. At present, it is widely used in engineering to use sand discharge bottom holes to discharge the silt in ...

AI Technical Summary

Problems solved by technology

The sand discharge bottom hole is generally arranged at the lower part of the water inlet of the dam. After the bottom hole gate is opened, the water in front of the dam will flow to the orifice and collect, which will easily cause local scour of the river bed and form a funnel-shaped scour pit, which is commonly called scour funnel in engineering. , the shape and scale of the scour funnel are difficult to control and the range is small, so it is difficult to achieve the ideal sand discharge effect

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