基于PLC控制混砂车液位自动控制系统研究

Study of Automatic Control System Based on PLC to Control Liquid Level of Blending Equipment

目前部分油田在加砂压裂施工作业中,还有采用手动操作的方式控制混合液面高度、砂比及砂泵排出压力和流量等参数,很难达到油井压裂施工的设计要求,误差很大。混砂车液位自动控制系统是通过PLC自动控制,实现压裂施工过程中混砂车液面高度自动控制,同时也实现了砂比、砂泵排出压力等参数的自动控制。该系统通过油田现场试验,取得了很好的效果。

At present,the sand fracturing in some oil fields still uses manual operation to control liquid level altitude, sand ratio,discharge pressure or flow quantity of sand pump,etc. It＇s very difficult to achieve the design requirements of the oil wells fracturing work and great error exists. The automatic control system of liquid level of blending equipment is automatically controlled by the PLC,accomplishing automatic control of liquid level altitude or sand ratio or discharge pressure of sand pump, etc. Through the field test of oil fields, the automatic control system has been achieved good results.