基于PLC的码头定量发油系统设计

摘要

采用高可靠的双机热备份PLC系统对成品油油库码头定量发油进行控制,可以克服人工发油的多种弊端,提高发油的精度.输油泵采用变频器进行调控并结合电液阀的多段控制,避免输油管路产生水击,提高了输油作业的工作效率和安全性.%In refined oil depot wharf, the hot-standby redundant PLC to control the ration distribution system is adopted, which can overcome many disadvantages in manual control and improve the distribution precision. The frequency converter for oil transfer pump and multi-stage control for electro-hydraulic valve are used to prevent water hammer in oil pipe, and improve the efficiency and safety in oil transmission.