几种园林地埋式旋转喷头水力性能试验对比与工作参数确定

Hydraulic Performance Test and Working Parameters Determination of Garden Pop-up Rotational Sprinkler

为了解决园林绿地喷灌中喷头参数选择不当导致灌溉不均匀的问题,对比研究了Rain Bird-3500、Hunter-PGP、Toro-mini-8、K Rain-PRO四种典型园林地埋式旋转喷头的水力性能和经济性参数,确定了四种喷头的适宜运行工作参数。结果表明,四种地埋式喷头的流量、运转速度、组合平均喷灌强度和喷灌均匀系数的变化趋势基本一致;喷头的流量随着工作压力的增大而增大;随着喷头组合间距的增大,平均喷灌强度、喷灌均匀系数和喷头投资总体有下降的趋势;当喷头间距一定时,工作压力越大,喷灌均匀系数逐渐增加。综合喷灌质量、节能性和经济性三方面考虑,建议Rain Bird-3500和K Rain-PRO工作压力以0.20 MPa,组合间距为14 m×14 m为宜;Hunter-PGP的工作压力以0.25 MPa,组合间距采用14 m×14 m为宜;建议Toro-mini-8的工作压力以0.15 MPa,组合间距以12 m×12 m为宜。

In order to solve the problem of non-uniform irrigation caused by improper selection of sprinklers for gardens irrigation,this study proposed working parameters of four typical pop-up rotational sprinklers for gardens irrigation,including Rain Bird-3500,Hunter-PGP,Toro-mini-8 and K Rain-PRO,by comparing their hydraulic performance and economic parameters.The results showed that the flow rate,running speed,combined average sprinkler intensity and sprinkler uniformity coefficient of the four garden pop-up rotational sprinklers are basically the same;with the increase of the working pressure,the flow rate of the sprinklers increased;with the increase of the sprinkler spacing,the average application rate,the combined sprinkler uniformity and investment of per unit tended to decrease overall.When sprinkler spacing was constant,the higher the pressure was,the greater the sprinkler uniformity was.When considering the irrigation quality,energy conservation and economic analysis,it is recommended that the working pressure of Toro-mini-8,Rain bird-3500,K Rain-Pro and Hunter-PGP should be at 0.15,0.20,0.20 and 0.25 MPa respectively,the sprinkler spacing of Toro-mini-8 should be 12 m×12 m and other sprinklers should be 14 m×14 m.