文档介绍：摘要
随着社会经济的迅速发展,人们对供水质量和供水系统可靠性的要求不断提高。再加上目前能源紧缺,利用先进的自动化技术、控制技术以及通讯技术,设计高性能、高节能、能适应不同领域的恒压供水系统成为必然趋势。
本论文依据供水要求,设计了一套由PLC、变频器、远传压力表、多台水泵机组等主要设备构成的全自动变频恒压供水,具有全自动变频恒压运行、自动工频运行和现场手动控制等功能。系统有效地解决了传统供水方式中存在的问题,并具有多种辅助功能,增强了系统的可靠性。
该毕业设计对环保、节能、自动补压型给水设备作了介绍。从节能科技的实践出发,阐述了变频调速技术在高楼给水设备中的应用。以PLC电路控制方式,介绍了智能水压控制系统的工作原理及PLC控制系统。在分析水压控制的工作流程的基础上,给出了PLC控制系统的硬件和软件设计。论文分析了多泵供水方式的各种供水状态及转换条件,分析了电机由变频转工频运行方式的切换过程及存在的问题。给出了实现有效状态循环转换控制的电气设计方案和PLC控制程序设计方案。
关键词:可编程序控制器,变频调速,恒压供水,PLC
ABSTRACT
With the rapid socio-economic development of water quality and water supply systems to improve reliability requirements. In addition, the current energy shortage, the use of advanced automation technology, control technology munication technology, the design of high performance, high energy, able to adapt to different areas of constant pressure water supply system has e an inevitable trend.
In this paper, based on water requirements, the design of a set by the PLC, frequency converter, Far Easton pressure, multi-pump unit consisting of major equipment such as automatic frequency conversion constant pressure water supply, with automatic constant frequency operation, automatic frequency run and on-site features such as manual control. System to effectively solve the traditional way of water supply problems, and have a variety of auxiliary functions, and enhance the reliability of the system.
Be graduation practice's turn to have filled up pressure type water supply equipment work to environmental protection, energy conservation, automation introduce that. The frequency conversion speed regulation technology having set off from energy conservation science and technology practice, expounding hits the target in high building water supply equipment applying. Introduced the intelligent hydraulic pressure control system principle of work and the PLC control system. Paper analyzes the various ways water pump the state water supply and conversion conditions, analysis of the motor to change jobs