基于PLC和变频调速的分时恒压供水系统设计

Design of Water-Supply System with PLC-Based Frequency Conversion Time-Sharing Constant Pressure

在分析南通钢厂生活水系统存在的水电等资源浪费问题的基础上,提出了变频恒压供水系统改造方案,设计了一套基于PLC控制的变频调速分时恒压自动控制供水系统,并成功应用于南通钢厂的生活水系统中。该系统由PLC、触摸屏、变频器、压力变送器、水泵电机组及控制柜等主要设备构成,具备全自动分时变频恒压运行、手自动转换等功能。系统有效地解决了传统供水方式中存在的问题,实现了节约能源及减少公司成本的目的,同时该系统具备运行可靠、控制灵活、自我保护功能完善等特点,并具有多种辅助功能,增强了系统的可靠性。

Based on the analysis of water and electricity waste problems of Nantong steel company living water system,frequency variable constant pressure water supply system improvement actions were presented.A series of frequency variable constant pressure automation control water supply system based on PLC control was designed,and successfully applied in Nantong steel company living water system.This automation frequency variable constant pressure water supply system consists of PLC,touch screen,inverter,pressure converter,water pump motor set,control cabinet and so on main equipments.This system has fully automation time separated frequency variable constant pressure operation,manual automatic conversion functions.This system effectively solved problems that exist in traditional water supply,achieved energy conservation and company cost reduction purpose,meanwhile this system is with reliable operation,flexible control,self-protection,complete functions,and also with a variety auxiliary functions,this strengthens the reliability of the system.