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山东科技大学和兖州矿业(集团)公司济宁三号煤矿应用电液比例方向阀并配合PLC的PID控制及对速度信号等相关数据采集信号的处理改动防爆液压绞车液压系统,提高了控制精度和自动化水平。绞车过减速点时原系统是人工根据提示来移动手柄减速,改进后PLC根据行程开关传递的信号使电磁换向阀得电动作,回路通过梭阀、电磁换向阀、溢流阀溢流
Shandong University of Science and Technology and Yanzhou Mining (Group) Company Jining No.3 coal mine application of electro-hydraulic directional control valve and PLC with PID control and speed signal and other related data acquisition signal processing Explosion-proof hydraulic winch hydraulic system to improve the control accuracy and automation Level. Winch deceleration point when the original system is manually move the handle according to the prompts to slow down the improvement of the PLC according to the travel switch to pass the signal so that the solenoid valve is energized, loop through the shuttle valve, solenoid valve, overflow valve overflow