Sudden-expansion and sudden-fall radial gate rear side wall aeration structure

Abstract

The invention discloses a sudden-expansion and sudden-fall radial gate rear side wall aeration structure, and belongs to the field of water conservancy and hydropower. The structure comprises a radial gate, side walls, a bottom plate, a ventilation shaft, a sudden-expansion and sudden-fall water stop mechanism and side wall aeration mechanisms, wherein the side walls are located on the two sides of the bottom plate, a water flow channel is formed between the side walls and the bottom plate, the radial gate is installed on the water flow channel, the ventilation shaft is located on the downstream of the radial gate and communicates with a cavity area on the top of downstream flood discharge water flow, the sudden-expansion and sudden-fall water stopping mechanism is located on the upstream of the radial gate, and the side wall aeration mechanisms are located on the two side walls of the downstream of the ventilation shaft. According to the side wall aeration structure, under the condition that the width of an original flood discharge tunnel is not expanded, the multiple stages of side walls which are shrunk inwards firstly and then expanded laterally are arranged on the two side walls of the downstream of the ventilation shaft, water flow passes through the multiple stages of side walls after impacting the side walls through the gate, the water flow is fully aerated, the water flow on the side walls does not have a clear water area any more, and the side walls are not subjected to cavitation damage any more.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower, in particular to an aeration structure for a rear side wall of a suddenly expanding and suddenly falling arc gate. Background technique [0002] Since the 1950s, the world has used eccentrically twisted arc-shaped working gates in the aspect of high-voltage arc-shaped gates, and adopted sudden-expansion and stack-type ventilation to reduce corrosion, such as Longyangxia, Xiaolangdi, Dvorcek in the United States, and Japan's second Seto et al. This arc-shaped gate organically combines the water-stop of the gate with the ventilation hole facilities, and aerates the water flow through the side cavity formed by the arc-shaped sudden expansion structure and the bottom cavity formed by the stacked ridge, so as to prevent cavitation damage of the downstream side wall. Its layout is generally as Figure 4 and 5 shown. [0003] During the actual operation of the water conservancy project...

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