Curved surface corner attaching narrow slit lifting ridge

Abstract

The invention discloses a curved surface corner attaching narrow slit lifting ridge. A reverse arc section is used for connecting the lifting ridge with a drainage groove. The upstream part and the downstream part of an edge wall of the reverse arc section are connected with a drainage groove edge wall and a linear edge wall correspondingly, and the upstream part and the downstream part of a bottom plate of the reverse arc section are connected with a drainage groove bottom plate and a horizontal bottom plate correspondingly; a reverse arc lifting bottom plate is arranged behind the horizontalbottom plate; the linear edge wall and a curve edge wall are connected at a lifting ridge outlet, and the curve edge wall is a contracting type edge wall; a clipped corner is arranged at the tail endof the curve edge wall; and an emergence bottom plate and a reverse arc lifting bottom plate are connected in a tangential manner at the lifting ridge outlet, and a falling ridge is arranged at the middle portion of the emergence bottom plate. According to the curved surface corner attaching narrow slit lifting ridge, the defects that the heights of the edge walls on the two sides of a conventional narrow slit lifting ridge are large, the pulse pressure intensity of the high-speed draining water flow effect on the edge walls on the two sides is large, stability of the structure is not facilitated, and a small-flow water tongue can be hardly lifted are overcome; the curved surface corner attaching narrow slit lifting ridge has the beneficial effects that the draining water flow is collidedfiercely by itself, space diffusion is sufficient, the energy consumption power of a downstream river channel is improved, and small-flow water tongue lifting is ensured; and in addition, the edge walls are low, and stress of the structure is stable.

Description

technical field [0001] The invention relates to a raised ridge with angled narrow seam on a curved surface, and belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] Among the discharge structures of Chinese dams at home and abroad, deflected flow energy dissipation is the most widely used. The basic principle of deflected flow energy dissipation is to use the huge kinetic energy carried by the high-speed water flow to deflect the water flow to the downstream far away from the building, so that the scour of the river bed by the falling water tongue will not endanger the safety of the building. Conventional narrow slit sill is a common shrinkage deflector energy dissipator. With the help of the shrinkage of the side walls on both sides of the sill, a narrow slit is formed at the outlet downstream of the sill, which promotes the lateral contraction of the water flow and makes it flow in the sill. The downstream of the ou...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a narrow seam sill with a curved surface, to overcome the high height of the side walls on both sides of the conventional narrow slit sill, and the large pulsating pressure of the high-speed discharge water on the two side walls, which is not conducive to structural stability. And the disadvantage that the water tongue is difficult to pick up under small flow

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