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Discharge chute with projections

A technology of protruding body and chute, which is applied in the field of chute of drainage structures in water conservancy and hydropower projects, can solve problems such as cavitation damage and erosion damage, reduce energy dissipation and anti-scouring pressure, increase frictional resistance, and improve flood discharge safety effect

Inactive Publication Date: 2013-02-13
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, 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 and reduce its own cavitation damage and erosion damage, but in practice, due to the high flow rate, smooth chute still has the risk of cavitation damage and erosion damage

Method used

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  • Discharge chute with projections
  • Discharge chute with projections
  • Discharge chute with projections

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. Streamlined, the height of the protrusions is 0.5m-2.0m, the protrusions 1 are arranged in a staggered manner; the average slope of the bottom plate 2 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; the longitudinal distance between the protrusions 1 Or the lateral spacing can be controlled between 2 to 8 times the diameter of the hemispherical bottom circle to obtain the maximum roughness value, and the roughness value can be controlled between 0.04 and 0.12; The body can be directly installe...

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Abstract

The invention discloses a discharge chute with projections, comprising a bottom plate and side walls at the two sides of the bottom plate. The bottom plate is in the folded line or inclined straight line shape, and the bottom plate and / or the side walls are provided with a plurality of projections. As the bottom plate and / or the side walls of the discharge chute are provided with projections, the roughness of the discharge chute is improved, the frictional resistance is increased, the turbulent energy dissipation rate is improved, a large amount of water flow energy is consumed, the risk of cavitation damage and erosion damage of the discharge chute is reduced, and the flood discharge safety is improved..

Description

technical field [0001] The invention relates to a water conservancy and hydroelectric project drainage building discharge channel, in particular to a high-roughness protrusion discharge channel suitable for high-speed water flow. 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, the smooth chute still has the risk of cavitation damage and erosion damage. 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 en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
Inventor 王立杰戴晓兵
Owner POWERCHINA ZHONGNAN ENG
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