Aerification structure used for stepped overflow channel
An overflow channel and stepped technology, applied in the field of stepped overflow dams, can solve the problems of temperature difference, affect performance, affect the flatness of aeration facilities, etc., and achieve the effects of high aeration concentration, improved efficiency rate, and full aeration.
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[0028] Embodiment 1: refer to Figure 1 to Figure 5 , is the aeration structure of the original stepped spillway, including the pre-aeration sill 4 and the first step 5, the water flows through the pre-aeration sill at high speed, and under the action of the pre-aeration sill 4, the first step is easy A stable air-entrained cavity is formed at the bottom of the water tongue. At the same time, the front aeration sill elevation 4 and the first step elevation 5 tend to form a large negative pressure, which is not conducive to the protection of the steps, and is prone to cavitation and cavitation, which affects the dam Safety.
[0029] Such as Figure 6-9 As shown, the present invention provides an aeration structure for a stepped spillway, including a main air duct 1, an upper row of dispersed air ducts 2, a lower row of dispersed air ducts 3, a pre-aeration sill 4 and a first step 5 , the inside of the pre-aeration sill 4 and the first step 5 are respectively provided with an ...
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