论文部分内容阅读
近几年来,在我国北方一些地区,采用塑料薄膜软管输水灌溉的越来越广泛,省水,省地,省能的效果显著,很受群众欢迎,这种低压输水软管的水力学特性与普通的硬管不同,它的过水断面面积,沿程水头损失怎样计算?怎样经济合理地配置选用规格适宜的软管?这些都是在软管低压输水灌溉推广应用中需要研究解决的技术问题。为适应这些需要,本文通过理论推导及试验实测对软管的外形特性及水力学特性进行了分析研究,并对软管的规划设计提出了建议。
In recent years, some areas in northern China, the use of plastic film hose irrigation more widely, saving water, land, energy-saving effect is remarkable, very popular with the masses, this low-pressure water hose Mechanical characteristics and ordinary hard pipe is different from the cross-sectional area of its water head along the way how to calculate the loss? How to configure the rational use of appropriate specifications of the hose? These are in the hose to promote the application of low-pressure irrigation needs to be studied Solved the technical problem. In order to meet these needs, this paper through the theoretical derivation and experimental measurement of the shape and characteristics of the hose were analyzed, and the hose design and planning recommendations.