Side wall impact rebound low-pressure area sudden expansion and sudden falling radial gate aeration structure

Abstract

The invention discloses a side wall impact rebound low-pressure area sudden expansion and sudden falling radial gate aeration structure. The radial gate aeration structure comprises a radial gate, a side wall, a bottom plate, vent holes, a primary sudden expansion and sudden falling water stop structure and a secondary sudden expansion and sudden falling aeration structure. The radial gate is transversely arranged on the side wall, the bottom plate is located at the bottom end of the side wall, the vent holes are located in the downstream of the radial gate and communicate with a cavity area in the top of downstream flood-discharged water flow, the primary sudden expansion and sudden falling water stop structure is located at the upstream of the radial gate, and the secondary sudden expansion and sudden falling aeration structure is located at the junction of a downstream water flow impact area and a low-pressure area. According to the radial gate aeration structure provided by the invention, the side wall is subjected to secondary sudden expansion at the low-pressure area to form a longer side aeration cavity, so that the water flow in the original low-pressure area is not attached to the side wall any more, the starting point of cavitation damage is located in the low-pressure area, and when the water flow is not attached to the side wall any more, the side wall cannot be subjected to cavitation damage even if the water flow is subjected to cavitation. The gate can safely operate under various opening degrees, and the operation of the gate is not limited any more.

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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