Manufacture of Insertion Subsurface Emitter and Experimental Analysis of Its Hydraulic Characteristics

Based on structure improvement and optimization design of existing emitter,such as drip arrow and drip production,a new kind of insertion subsurface emitter is researched and developed,which has the advantages of assembling and disassembling quickly,moving easily,anti-jamming.Through analysis of concrete structure and work principle of the insertion subsurface emitter,the uniformity coefficient of discharge flow and the relation between pressure and discharge are tested.The results show that the insertion subsurface emitter has more stable hydraulic characteristics,its rated flow is small and the needed beginning pressure is low.So the emitter is suitable for the compensatory irrigation of the non-close planting crops to resist drought in areas of water-lacking,and will play an active role in improving the equipment utilization and reducing the total investment of irrigation system.It also successfully transformed the application pattern from surface drip irrigation to subsurface drip irrigation.