罩盖喷杆喷雾机的设计与防飘试验

Design and Anti-drift Efficacy Evaluation of a New Shield Boom Sprayer

在机动背负式喷杆喷雾机的基础上设计了一台适合大田作业的手扶式罩盖喷杆喷雾机,分别进行了田间和室内防飘性能试验。结果表明,罩盖喷雾能增加雾滴在冠层中的穿透性,尤其使用小流量喷头时防飘效果更加明显。罩盖能够显著增加药液在喷头附近的沉积,减弱雾滴向下风向的运动能力,减少飘失。使用ST110-015型喷头,喷雾压力0.4MPa时罩盖的防飘效果最好。在相同风速下,罩盖对雾滴的防飘失效果不同,对较小雾滴的防飘失效果优于较大雾滴。

A hand-pushed shield boom sprayer was developed based on a knapsack small motor-driven sprayer. Several measurements were done both in room and open field. Results showed that shield could lead horizontal air down to wheat canopy to increase the canopy penetration, especially for small size droplets, and improve the distribution near nozzle obviously. Theanti- drift efficacy under 0.4 MPa with nozzle ST110 - 015 was the best. The tests showed that the anti-drift efficacy changed with different droplet sizes, and it was better for small size droplets than for large size droplets.