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该文提出了 U形渠道抛物线形移动式量水堰板 ,研究量水堰板的壅水高度、临界淹没度、喉口水深 -流量关系与渠道断面、比降和喉口收缩比的关系 ,给出了喉口收缩比范围和流量系数计算公式 ,分析了其测流误差。研究表明 :U形渠道抛物线形移动式量水堰板 ,量水精度较高 ,结构简单 ,造价低 ,使用方便 ,可用于各种小 U形灌排渠道的移动式测流
In this paper, a U-shaped parabola-shaped movable weir plate is proposed to study the relationship between the height, the critical submergence, the throat flow-depth relationship and the channel cross-section, The throat shrinkage ratio range and flow coefficient formula are given, and the error of flow measurement is analyzed. The research shows that the U-shaped channel parabolic mobile weir plate has the advantages of high precision of measuring water, simple structure, low cost and convenient operation. It can be used in various mobile U-shaped flow channels