微喷带抗堵塞性能影响因素试验研究  

Experimental Study on the Influence Factor of Anti-clogging Performance of Micro-sprinkling Hose

作　　者：魏榕 王文娥[1] 胡笑涛[1] 王文娟[1] 徐茹 王宇[1] WEI Rong;WANG Wen-e;HU Xiao-tao;WANG Wen-juan;XU Ru;WANG Yu(Key Laboratory of Agricultural Soil and Water Engineering in Arid Areas,Ministry of Education,Northwest A&F University,Yangling 712100,Shaanxi Province,China)

机构地区：[1]西北农林科技大学旱区农业工程教育部重点实验室,陕西杨凌712100

出　　处：《节水灌溉》2021年第3期64-68,共5页Water Saving Irrigation

基　　金：陕西省自然科学基金项目(2020JM-166);“十三五”国家重点研发计划项目(2016YFC0400203)。

摘　　要：为探究泥沙浓度与进口压力对微喷带堵塞的影响,采用含沙水短周期连续灌溉的试验方法,将粒径小于1 mm的泥沙,配置成3种泥沙浓度的浑水,分别在4种进口压力下,观测微喷带单循环孔组流量变化,结合孔组相对流量分析微喷带堵塞规律。结果表明:在本次试验的泥沙粒径条件下,相同进口压力下,微喷带孔组堵塞程度并不完全随浑水含沙量增大而增大;同一泥沙浓度时,进口压力低于额定工作压力时易造成喷孔堵塞。泥沙浓度与进口压力均对微喷带抗堵塞性能影响显著,利用含有泥沙粒径与级配与本次试验相似的含沙水灌溉时,应尽量避免泥沙浓度为1.0 g/L,并使用较高的首部压力或在灌溉结束时用高于工作压力(不高于爆破压力)的首部压力冲洗微喷带。In order to explore the impact of sediment concentration and inlet pressure on the clogging of the micro-spraying hose,this paper adopted the test method of short-period continuous irrigation with sand-containing water,and configured the sediment with a particle size of less than 1 mm into muddy water with three sediment concentrations.Under four inlet pressures,the flow changes of the single-circulation hole group of the micro-sprinkling hose were observed,and the blockage law of the micro-sprinkling hose was analyzed based on the relative flow of the hole group.The results showed that:under the conditions of the sediment particle size in this experiment,under the same inlet pressure,the clogging degree of the micro-sprinkling hose group did not completely increase with the increase of the muddy water content;at the same sediment concentration,when the inlet pressure is lower than the rated working pressure,it is easy to cause the nozzle to be blocked.Both the sediment concentration and the inlet pressure had significant effects on the anti-clogging performance of the micro-sprinkling hose.When the sandy-containing water with sediment particle size and gradation similar to that in this experiment is used for irrigation,the sediment concentration of 1.0 g/L should be avoided as far as possible,and high head pressure should be used,or the micro-sprinkling hose should be washed with the head pressure higher than the working pressure(not higher than the burst pressure)at the end of irrigation.

关 键 词：微喷带 抗堵塞 泥沙浓度 

分 类 号：S275.5[农业科学—农业水土工程]