微喷带单孔水量分布影响因素试验研究

为了探究微喷带管径、喷孔结构、工作压力以及喷射角度对单孔水量分布影响,以常用的机械打孔的Ф28,Ф32,Ф40和Ф50这4种微喷带为研究对象,通过调节微喷带的喷射角度和工作压力,研究微喷带正常运行时单孔喷水(其他孔进行遮挡,不混入测试单孔的水流中)特性,测定了不同工作压力条件下射程、湿润面积、干燥区宽度等参数.结果表明:喷水射程随喷射角度先增大再减小,射程最大值为30°~ 40°,随工作压力的增大而增大;湿润区宽度与喷射角度、工作压力均存在正相关的关系;射程与干燥区宽度随喷射角度的变化规律相同;湿润区面积的最大值出现在喷射角度为50°时.在实际运行中,建议微喷带喷射角度为30°~50°,并应根据干燥区与射程合理布置相邻微喷带的铺设间距.

Experimental study on influencing factors of water distribution in single hole of micro-sprinkler belt

To analyze the effects of the micro-sprinkler diameter, nozzle structure, working pressure, and spray angle on the water distribution in single-hole,Ф28, Ф32, Ф40, and Ф50, commonly used in mechanical drilling, were studied while different pressures were applied to study the characteristics of single-hole sprinkler(other holes were occluded and not mixed into the flow of single-hole)under normal operation. The parameters of range, wetting area, and width of the drying zone under different working pressures were measured. The spray distance range increases first and then decreases with the spray angle, and the maximum range is between 30°and 40°. The range increases with the increase of the working pressure. There is a positive correlation between the wetting zone width, the spray angle and the working pressure. The variation of the range and the width of the drying zone with the spray angle is the same. The maximum value of the wetting zone area appears at the spray angle of 50°. In actual operation, it is suggested that micro spray jet angle is between 30°-50°, and the laid spacing of adjacent micro spray should be reasonable decorated according to the dry area and range.