加气对不同流道结构滴头堵塞的影响  

The Influence of Air Filling on the Clogging of Dripper with Different Flow Channel Structure

作　　者：郭庆[1] 张二信 杨建飞 GUO Qing;ZHANG Er-xin;YANG Jian-fei(Yangling Vocational and Technical College,Yangling 712100,Shaanxi Province,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,Shaanxi Province,China;Agriculture and Rural Affairs Bureau of Zhouzhi County,Xian 710400,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [3]周至县农业农村局,西安710400

出　　处：《节水灌溉》2021年第11期55-60,共6页Water Saving Irrigation

基　　金：国家自然科学基金项目(52079112,51679205);杨凌职业技术学院自然科学研究基金项目(A2018016)。

摘　　要：为明确加气对滴头堵塞的影响,研究了4种不同流道结构参数的内镶贴片式滴头的流量变化和堵塞规律,分析了影响滴头堵塞的主要参数。结果表明:加气灌溉下,滴头E1~E4的毛管淤积物比未加气处理增加36%~74.65%,滴头E1~E3的流道淤积物比未加气增加10.94%~88.71%,E4则减少162.2%,加气显著影响滴头的堵塞过程(P<0.05);加气情况下,额定流量、入口栅栏面积、流道长和流道结构类型显著影响滴头堵塞,入口栅栏面积对滴头堵塞的影响最大,入口栅栏面积最大的E4滴头堵塞程度最低,入口栅栏面积较小的E1、E2和E3滴头堵塞程度相对较高;与未加气处理相比,灌溉结束时滴头E1~E3的相对流量降低20.83%~26.11%,滴头E4提高30.91%;加气滴灌滴头堵塞受入口栅栏面积的影响程度更高。加气灌溉时,应选入口栅栏面积较大的滴头,滴头宜布置在毛管顶部,避免毛管内淤积堵塞。In order to clarify the influence of air filling on the clogging of the dripper,the flow changes and clogging laws of the embedded patch dripper with four different flow channel structure parameters were studied,and the main parameters affecting the clogging of the dripper were analyzed.The results showed that:under aerated irrigation,the capillary sediments of the E1~E4 drippers increased by 36%~74.65%,the flow channel sediments of the E1~E3 drippers increased by 10.94%~88.71%and that of E4 decreased by 162.2%compared with that without aerated.Aerated irrigation significantly affected the clogging of the dripper(P<0.05).Under aerated irrigation,the rated flow rate,inlet fence area,channel length and channel structure type had significant influence on the dropper blockage.The inlet fence area had the greatest influence on the dripper blockage.E4 with the largest inlet fence area had the lowest degree of blockage,while E1,E2 and E3 with the smaller inlet fence area had a relatively high degree of blockage.Compared with the non-aerated treatment,the relative flow rate of E1~E3 at the end of irrigation decreased by 20.83%~26.11%,and the relative flow rate of E4 increased by 30.91%.The influence of inlet fence area on dripper blockage of aerated drip irrigation was higher.For aerated irrigation,the dripper with a large area of inlet fence should be selected,and the dripper should be arranged on the top of the capillary tube to avoid silting and blockage in the capillary tube.

关 键 词：加气灌溉 加气滴灌 堵塞 滴头堵塞 流道结构 

分 类 号：S275.6[农业科学—农业水土工程]