A kind of arc-shaped gate air-entraining structure with sudden expansion and sudden drop in the low-pressure area of ​​side wall impact rebound

Abstract

The invention discloses an arc-shaped gate air-entraining structure with sudden expansion and sudden drop in the low-pressure area of ​​side wall impact rebound. Sudden drop aeration structure; the arc gate is placed horizontally on the side wall, the bottom plate is located at the bottom end of the side wall, the ventilation hole is located downstream of the arc gate and connected to the cavity area at the top of the water flow after the downstream flood discharge, a sudden expansion and sudden drop water stop structure Located upstream of the arc gate, the secondary sudden expansion and sudden drop aeration structure is located at the junction of the water flow impact area downstream of the vent hole and the low pressure area. In the air-entrained structure of the arc-shaped gate provided by the invention, the side wall is suddenly expanded twice in the low-pressure area to form a longer side-aerated cavity, so that the water flow in the original low-pressure area no longer sticks to the side wall, and the cavitation is destroyed by cavitation. The starting point is located in the low pressure area. When the water flow no longer sticks to the side wall, even if the water flow is cavitated, the side wall will not be damaged by cavitation; the gate can operate safely under various opening degrees, and the operation of the gate is no longer affected. limit.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower, in particular to an arc-shaped gate aeration structure in which a side wall impacts and rebounds in a low-pressure area and suddenly expands and suddenly falls. Background technique [0002] For the traditional arc gate with high water head, due to the need of water stop, a sudden expansion and sudden drop structure must be installed along the edge of the arc gate. Part, so as to achieve a better water stop. [0003] Due to the high water head flood discharge, the water flow velocity is very high, which is easy to cause cavitation and cavitation damage, and good aeration can well avoid cavitation and cavitation damage and protect the safety of the flow wall. The existing technology is to use the sudden expansion and sudden drop structure of the arc gate to increase the width of the sudden expansion and the height of the sudden drop, and to combine the water-stop sudden expansion a...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the object of the present invention is to provide an arc gate aeration structure with sudden expansion and sudden drop in the impact rebound low pressure area of ​​the side wall, so as to solve the poor aeration effect of the existing arc gate with sudden expansion and sudden drop. The problem of cavitation damage is extremely prone to occur in the clear water area

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