CNG加气母站两机联动中一键操作的研究与实现

The Research and Implementation about One Key Operation in CNG Main Station with Two Machine Linkage

目前,在原料气压力较低,需要用螺杆压缩机增压后再经过活塞压缩机压缩,制成成品气的CNG加气母站工艺中,起动和停止设备时,自动化程度不高,操作手续繁琐,容易引起故障;针对这种现象经过认真的分析与研究,提出了一种改善的方法,主要是提出了增加"一键操作柱","中间继电器"和"一进两出隔离栅"等硬件,同时在PLC程序中增加相应功能;实现螺杆压缩机与活塞压缩机在开机和停机过程中的相互关联,实现了只需按下"起动"或"停止"按钮即可开机或是停机的目的;达到了一键开机或停机的效果,操作方法非常简单,减少了事故的发生;极大提升了系统的自动化程度和运行可靠性。

At present, when the pressure is low, Need to use screw compressor pressure again after a piston compressor compressed into finished products of gas at CNG main station, When start and stop the equipment, the automation is low, Operations are cumbersome, Easy to cause failure; Against the phenomenon of serious analysis and research, then proposes a improving method, mainly put forward to increase ＂one key operation column＂, ＂intermediate relay＂ and ＂one into two isolation grid＂ and other hardware, at the same time increase the corresponding function in PLC program; screw compressor and piston compressor in the process of starting and stopping relate to each other, realize the just press the ＂start＂ or ＂stop＂ button starting or stopping purposes; Achieve the effect of a key starting or stopping, operation method is very simple, reduce the occurrence of the accident; Greatly improve the degree of automation and reliability of the system.