Development And Exploitation Of Lateral Discharge Regulator In Drip Irrigation System

For the problems of less species and complex structure of discharge regulator, in thispaper, a simple structure discharge regulator is developed by test and improve structure, inorder to improve irrigation uniformity. Paper based on the discharge regulator design processas the clue, describes2kinds of structures of the discharge regulators, by studying andanalyzing the effect of different elastic diaphragm parameters and structure parameters on thedischarge regulator hydraulic performance, finally establish the best optimal combination ofelastic diaphragm parameters and structure parameters, to achieve product development.Through theoretical analysis to design the structure of discharge regulator, make RPspecimens to do hydraulic performance test, through the hydraulic performance test ofdischarge regulator, the structure with performance does not meet the requirements need toimprove, until the performance test results are good. In this paper, through test and analysis,main conclusions are as follows:（1）Selected three levels of thickness and hardness of elastic diaphragm to do acompletely experiment with structure1, tested hydraulic performance of discharge regulatorwhen the setting inlet pressure is50KPa-300KPa, with the result that discharge is962.794L/h-1419.538L and flow exponent is0.0835-0.1685. The analysis result show hardness andthickness a significant affect on flow exponent and discharge. But the compensation range istoo small, flow is too big, so need to do a certain structure adjustment with structure1,optimize discharge regulator.（2）Through the structure adjustment to get structure2, do the single factor test andorthogonal test considering the interaction of structure parameters and elastic diaphragmparameters effects on hydraulic performance with structure2, get the outlet diameter is nosignificant relationship on hydraulic performance, hardness, thickness and foundation heighthave a significant influence on flow exponent and rated discharge, and foundation heightaffects compensation range, the optimal combination of the three factors for the hardness of70degrees, the thickness of2.2mm, lower height4mm. The optimal combination’s dischargeis279.1154L/h and flow exponent is0.1393.（3）Through the hydraulic performance test of temperature on the structure2discharge regulator stallation of different parameters of elastic diaphragm, get discharge regulatorsinstalled different parameters of elastic diaphragm have same sensitive to temperature. Thehydraulic performance shows the same change trend with the temperature change. Thecompensation range and rated discharge of discharge regulator present certain regularity withthe temperature increasing, compensation range increases with the rise of temperature, ratedflow decreases with the rise of temperature. Temperature has significant effects on flowregulator hydraulic performance, shall be deemed to be main influencing factors in thedevelopment process.In this paper, the clues is the design process of the discharge regulator, mainly two kindsof structure was designed, in the structure1was negative after exploratory experiment, thestudy of structure2is more in-depth and concrete, finally get optimal combination of thestructure and the elastic diaphragm with structure2, the combination can meet the designrequirements of the discharge regulator, has realized the product development. Furtherresearches on the product are did,there are research and analysis the pressure changes of frontand back side of elastic diaphragm while pressure rising and hydraulic performance test oftemperature on the structure2discharge regulator stallation of different parameters of elasticdiaphragm, the result is meaningful.