The degree of consistency change of sprinkler head and the o 8mm depression drip pipe with the change of pressure has been tested . the main conclusion of this study has been produced as follows : ( 1 ) the theory will be correct and notable benefit will be obtained through the utilization of the frequency changer in tube - well irrigation , spray irrigation and drip irrigation . ( 2 ) some energy saving effect of the frequency changer utilization in tube - well irrigation , spray irrigation and drip irrigation will be produced , 37 本项目的研究内容主要包括变频调速装置在管灌、微喷以及大棚滴灌中的节能效果、变频调速装置对微喷和大棚滴灌均匀度的影响以及变频调速装置在管灌中进行“恒量变压”变频运行试验等，同时，对微喷头与中smm低压插入式滴灌带的灌溉均匀度随压力变化情况进行一r试验研究。
Based on some problems about random draft , energy conservation and ensemble efficiency of hydraulic - projects utilization , by the way of full - scale test , the application of frequency changer in agricultural water saving have been studied . it is the first time in china for the imagination that frequency changer has been used in tube - well irrigation in order to make the water pump keep constant transformation 本项目针对目前农业节水灌溉工程中存在的随机取水、节能问题和水利工程资源的综合利用效率提高问题，以实地工程应用试验为基础，对变频调速装置在农业节水灌溉工程中的应用进行了研究。
Mine electrical : integrated automation intelligent switch controller ; mine explosion - proof type intelligent combine switch ; mine power center ; mine vvvf devices ; automation system : mine hoist automation system ; coal preparation plant automation system ; drilling machine control system ; lines of motor vehicles and power leakage protection devices , etc 矿用电器：综合自动化智能开关控制器;矿用隔爆智能组合开关;矿用动力中心;矿用变频调速装置等;自动化系统：矿井提升机自动化系统;选煤厂自动化系统;钻井机自动控制系统;架线电机车电源及其漏电保护装置等。
And it can help us to open up the utilization scope of frequency changer . the main content have been studied in this paper . for example , the energy saving effect of the frequency changer utilization in tube - well irrigation , spray irrigation and drip irrigation , the influence of the frequency changer to the degree of consistency in tube - well irrigation , spray irrigation and drip irrigation , and the full - scale test of the frequency changer used in tube - well irrigation 本项目在国内首次提出了变频调速装置在管灌中使水泵进行“恒量变压”变频运行的设想，并首次对变频调速装置在农业节水灌溉中的应用进行了实地试验研究，该研究成果对变频调速装置在管灌、微喷及大棚滴灌中的应用具重要的指导意义，对变频调速装置的设计研究及其应用范围的拓展等具有一定的理论意义和很大的实用意义。
