Differential column-splitting inlet energy dissipater

Abstract

The invention relates to a differential column-splitting inlet energy dissipater, comprising a water current inlet section, a stilling pool connected with the water current inlet section, and an apron connected with the stilling pool; the water current inlet section is composed of a high-level drainage channel (drainage hole) and a lower-level drainage channel (drainage hole) which are arrayed alternatively, a slim is arranged at the boundary position of a drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel and a bottom plate of the stilling pool, the slim is a right-angle wedge shape, the bottom surface of the right-angle wedge shape is arranged on the bottom plate of the stilling pool, and the side surface vertical to the bottom surface of the right-angle wedge shape is attached to the drop-sill of the outlet end part of the high-level drainage channel of the water current inlet section and the lower-level drainage channel, a tail sill of the stilling pool is a differential tail sill, and the top surface of the differential tail sill is formed by a combined surface unit I and a combined surface II which have different structures and are arrayed alternatively; a middle isolated pier tail between the high-level drainage channel and the lower-level drainage channel is a cantilever type streamline pier tail. The energy dissipater can improve the service life and reduces scouring damage of water current to downstream river channels.

Description

technical field [0001] The invention belongs to flood discharge and energy dissipation facilities, in particular to a water flow inlet energy dissipation facility for high water head and large unit width flow. Background technique [0002] For water flow with high water head and large unit width, its flood discharge and energy dissipation are very important, but it is also difficult, and has always been a hot and difficult issue in the research of water conservancy. The patent application with the publication number CN 101215828A discloses a high and low sill bottom flow stilling pool. Its technical solution is to adopt a suitable contraction angle on the high sill (also known as the high discharge trough) of the water inlet section, but the opposite side is high. The outer wall of the ridge does not shrink. Although the energy dissipation facility of this structure can solve the problem of relatively large water fluctuations in the stilling tank and the tail sill of the st...

AI Technical Summary

Problems solved by technology

Although the energy dissipation facility of this structure can solve the problem of relatively large water fluctuations in the stilling tank and the tail sill of the stilling tank under certain specific conditions, it has the following shortcomings: 1. The high ridge of the water inlet section (high discharge trough or discharge hole) and the outlet end of the low sill (discharge hole of the low sill) and the junction of the bottom of the stilling tank for a long time deposit mud and sand, under the action of the vertical axis vortex and horizontal axis vortex, the first bottom plate of the stilling tank is abraded , it is bound to damage the structure of the stilling pool, seriously affect the normal operation of the flood discharge facilities, and even cause major engineering accidents

2. The connection between the stilling pool and the downstream channel is not ideal, resulting in serious erosion of the downstream channel by the water flow

3. The septal pier between the high sill (high discharge trough or discharge hole) and the low sill (low sill or discharge hole) is prone to cavitation and cavitation damage

Images