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Discharge chute

A chute and bottom plate technology, applied in water conservancy projects, marine engineering, coastline protection, etc., can solve problems such as erosion damage and cavitation damage, reduce energy dissipation and anti-scouring pressure, increase frictional resistance, and improve turbulent kinetic energy Effect of Dissipation Rate

Active Publication Date: 2013-02-06
POWERCHINA ZHONGNAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the bottom plate and side wall of the chute are mostly smooth and continuous. Ideally, with the cooperation of aeration and corrosion reduction facilities, the smooth chute has better adaptability to high-speed water flow and can better guide water flow and reduce its own cavitation damage and erosion damage, but in practice, due to the high flow velocity, there are still cases of smooth chute damage and erosion damage

Method used

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Examples

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Embodiment Construction

[0013] Such as Figure 1-Figure 3 As shown, an embodiment of the present invention includes a base plate 2 and side walls 3 on both sides of the base plate. The base plate 2 includes several sections of stepped base plates 5 and several sections of smooth base plates 6. The stepped base plates 5 and the smooth base plates 6 are arranged at intervals. And / or the side wall 3 is provided with several protrusions 1; the protrusions 1 are hemispherical or streamlined, the height of the protrusions 1 is 0.5m-2.0m, and the protrusions 1 are arranged in a staggered manner; the gradient of the stepped floor 5 is 5-60 0 ; The aeration and corrosion reduction facility 4 is connected to the upstream end of the bottom plate 2 .

[0014] The size of the protrusion 1 should be determined according to the hydraulic conditions of the chute. When a hemispherical protrusion is used, the ratio of the hemispherical height to the diameter of the bottom circle can be controlled between 1:2 and 1:8; ...

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Abstract

The invention discloses a discharge chute which comprises a bottom plate and side walls at two sides of the bottom plate, wherein the bottom plate comprises a plurality of stepped bottom plates and a plurality of smooth bottom plates; the stepped bottom plates and the smooth bottom plates are alternately arranged; and a plurality of convex bodies are arranged on the smooth bottom plates and / or the side walls. According to the discharge chute, the convex bodies are arranged on the smooth bottom plates and / or the side walls, so that the roughness of the discharge chute is improved, the frictional resistance is increased, the turbulent energy dissipation rate is improved, a mass of water flow energy is dissipated, the risks of the cavitation erosion destroy of the discharge chute and the erosion destroy are reduced and the flood discharge safety is improved.

Description

technical field [0001] The invention relates to a water conservancy and hydroelectric project drainage building chute, in particular to a stepped chute with variable slope and high roughness. Background technique [0002] For drainage structures of water conservancy and hydropower projects, the chute is a channel to restrict and guide water flow. At present, the bottom plate and side wall of the chute are mostly smooth and continuous. Ideally, the smooth chute has better adaptability to high-speed water flow with the cooperation of aeration and corrosion reduction facilities, and can better guide the water flow However, in practice, due to the high flow velocity, there are still instances of cavitation damage and erosion damage in smooth chute. When the water flow velocity of the chute is small and the single-width flow rate is not large, the chute can adopt a stepped type. Under the action of the steps, the stepped chute can dissipate the energy of the braking water flow a...

Claims

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Application Information

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IPC IPC(8): E02B8/06
Inventor 王立杰戴晓兵
Owner POWERCHINA ZHONGNAN ENG
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