压力对微喷带水量分布的影响研究

Effect of Pressure on Water Distribution of Micro-jet Zone

微喷带水量分布均匀性是影响微喷灌灌溉质量的重要因素,工作压力是控制微喷带喷洒均匀度的主要参数。以国内常见的一种机械打孔、内径为32 mm和28 mm的微喷带为研究对象,通过压力调节,分析压力对微喷带喷洒均匀度的影响,由垂直微喷带方向和沿微喷带方向上的水量分布情况得到喷洒均匀性最优时的压力值。结果表明,垂直微喷带方向上,Φ32微喷带Φ28微喷带都在压力23 k Pa处水量分布情况最好。沿微喷带方向,压力是逐渐减小的,水量分布情况决定于此处的压力值,使整条微喷带保持良好喷洒均匀度的条件就是让压力值保持在最优均匀度压力值附近。

The water distribution uniformity is an important factor influencing the quality of micro irrigation, and the main parameters of controlling the uniformity of micro spraying belt are working pressure. In this paper, the common micro sprinkling hoses with mechanical drilling and the inner diameter of 32 mm and 28 mm are selected as the research object and the effects of pressure on spraying uniformity are studied through pressure regulation. The pressure value for the optimal spraying uniformity is obtained through analyzing the water distribution in the vertical direction and the direction along the micro spray belt. The results show that in the vertical direction, both the water distribution of the micro spray belt with the inner diameter of 32 mm and 28 mm are the optimal under the pressure of 0.023 MPa; in the direction along the micro spray belt, the pressure is gradually decreased and the water distribution depends on the pressure of the hole. The condition for good spray uniformity of whole belt is to maintain the pressure near the value for optimal uniformity.