薄壁微喷带组合均匀度及铺设间距试验研究

【目的】研究薄壁微喷带组合均匀度及最佳铺设间距。【方法】选取市场常用的N44 mm微喷带,开展不同压力下微喷带喷洒强度、均匀度和喷洒宽度试验,利用Surfer软件克里金插值法按照水量组合原理对数据进行网格化处理,在1.0~2.0 R(喷洒宽度)范围内,分析微喷带组合喷洒强度、组合均匀度,确定微喷带合理组合间距。【结果】发现单管微喷带喷洒强度随喷洒距离增大呈双峰或单峰分布,喷洒宽度也随压力的增大而增大。组合喷洒强度随铺设间距的增大而减小;组合均匀度随铺设间距增大呈"大-小-大-小"的趋势,当微喷带铺设间距为1.6 R时,组合均匀度达到峰值。【结论】针对市场上常用的折径44 mm微喷带,发现当铺设间距为1.8 R与1.9 R时,组合喷洒强度较小,组合均匀度较大,满足规范要求。

Experimental Study on Uniformity of Combination and the Paving Spacing for Thin Wall Micro Spray Belt

【Objective】We aimed to study the combination uniformity and optimum laying space about the thin wall micro spray belt.【Method】Three kinds of micro spray belts were chosen which were often used in water saving engineering. Experiments were carried out on the intensity, uniformity and width of micro-spray belt under different pressures, and the Surfer software Kriging interpolation method of mesh data was used according to water volume combination principle about the thin wall micro spray belt with pipe diameter of N44 mm.Within the range of 1.0~2.0 R(spraying width), the spraying intensity and uniformity of micro-spraying belt for combination were analyzed, and the optimal spacing of micro-spraying belt for combination was determined.【Result】The results showed that the spraying intensity of single tube micro-spraying belt distributed as single and double peak with the increase of spraying distance, and the spraying width increased with the pressure. In addition, the combined spraying intensity decreased with the laying distance and the combination uniformity presented a trend of "large-small-large-small" with the increase of paving spacing.When the paving spacing of micro-spray belt was 1.6 R, the combination uniformity reached its peak.【Conclusion】The combined spraying intensity is smaller and the combined uniformity is larger when paving spacing is 1.8 R and 1.9 R, which meets the requirements of the commonly specification using micro spraying belt with pipe diameter of 44 mm in the market.