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圆缺孔板节流式差压量水计是一种非标准节流装置式差压流量计,主要用于量测含有脏污、泥沙和掺气水流条件下的液体流量。由于它本身具有一些突出的特点,所以用作我国低压管道灌溉系统中的量水设备是很适宜的。本文阐明了该量水计的量水原理和性能,重点介绍了其基本构造以及其改进结构。该量水计应用塑料管和塑料板加工制作,其结构简单、安装容易、管理方便、造价低廉、本章以实例介绍了该量水计的设计方法,并简介了该量水计的实验结果。实验表明,在各种情况下的测流误差均小于3%,但以安装方式Ⅱ为最优。
A truncated orifice orifice differential pressure gauge is a non-standard throttling differential pressure gauge designed primarily for measuring the flow of liquids containing dirt, sediment and aerated water. Because of its own salient features, it is suitable for use as a measuring and controlling device for low pressure pipeline irrigation system in our country. This paper clarified the principle and performance of the water meter, and introduced its basic structure and its improved structure. The water meter is made of plastic pipe and plastic plate and has the advantages of simple structure, easy installation, convenient management and low cost. The design example of the water meter is introduced in this chapter, and the experimental results of the water meter are introduced. Experiments show that in all cases, the error of flow measurement are less than 3%, but the installation method Ⅱ is the best.