Reservoir sand discharging device based on normal curved surface funnel

Abstract

The invention discloses a reservoir sand discharging device based on a normal curved surface funnel, and belongs to the technical field of water conservancy projects. The device comprises a sand inlet funnel and a sand conveying pipeline; the sand inlet funnel is located in a sediment accumulation area in a reservoir, the sand conveying pipeline is laid on a reservoir riverbed, the bottom of the sand inlet funnel is connected with one end of the sand conveying pipeline, and the other end of the sand conveying pipeline penetrates out of the bottom of a dam; and the appearance of the sand inlet funnel is in a bivariate normal curved surface shape, the shape of the sand conveying pipeline is in an anti-hyperbolic tangent curve shape, and a valve is arranged on the sand conveying pipeline. When the device runs, the valve on the sand conveying pipeline is opened, and under the action of water pressure in the reservoir, water flow carries sediment to be discharged into the downstream of the reservoir through the sand discharging pipeline. The normal curved surface shape of the sand inlet funnel and the hyperbolic tangent shape of the sand conveying pipeline can effectively solve the problem that a sand inlet and the interior of the pipeline are prone to being blocked, and the sand discharging efficiency is remarkably improved.

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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