作　　者： (鄢一新）; (邵怡斌）; (叶飞）; (鄢碧鹏）;

机构地区： 扬州大学环境科学与工程学院,江苏扬州225127

出　　处： 《排灌机械工程学报》 2016年第10期916-920,共5页

摘　　要： 通过在密闭式加药罐中设置柔性防水薄膜,设计了一种与现有产品工作原理不同的差压隔膜式加药装置,新装置利用输水管道中设置的减压阀产生压差,作用在密闭式加药罐上完成加药.加药罐中柔性薄膜起分隔水和药剂的作用,保持加药罐中药剂浓度不变.研究分析了输水管道压力、流量与加药流量之间的关系,发现装置加药流量与管道压力无关而与管道中流量成正比,加药装置具有加药流量自我调节功能,能够适应输水管流量变化,保证加药均匀度.加药装置性能试验表明,该装置的管道水头损失小于0.5 m,同一流量下不同时刻加药浓度偏差小于4%,不同流量下加药浓度偏差小于2%,通过调节减压阀的设置,可以调整加药比例,适应不同用户需求.该装置不会大幅度降低管道压力且加药浓度稳定,可广泛应用于设施农业喷灌、滴灌系统中的加药、施肥. With the flexible waterproof diaphragm set in the closed dosing tank,a new type of differential pressure diaphragm dosing device is designed. Its working principle is different from that of the existing products. The new device uses reducing valve set in the water pipe to produce differential pressure. The differential pressure has an effect on closed dosing tank and completes the dosing. The flexible waterproof diaphragms separate the water and reagent,keeping the dosing density unchanged. The connection among pipeline pressure,rate of flow and dosing flow was analyzed,finding out that dosing flow and pipeline pressure of the new device are irrelevant,but in direct proportion to the rate of pipeline flow. The dosing device has dosing flow self-adjusting function and can adapt to the changes of the main pipeline flow to guarantee dosing uniformity. The experimental result shows that the pipeline head loss of the device is less than 0.5 m and dosing density error under the same flow of different time is less than 4%,dosing density error under different flow is less than 2%. Changing the setting of the relief valve can adjust the dosing proportion,to meet the needs of different users. The dosing device will not reduce the pipeline pressure sharply and the dosing concentration is stable. Therefore,the device can be widely used in agricultural irrigation facilities,dosing and fertilizing of the drip irrigation system.

关 键 词： 加药装置 差压 隔膜 设施农业 滴灌