河北工程大学 高楼恒压供水系统毕业设计精选.docVIP

摘 要 随着我国社会经济的发展，城市建设发展十分迅速，同时也对基础设施建设提出了更高的要求。高楼供水系统的建设是其中的一个重要方面，供水的可靠性、稳定性、经济性直接影响到用户的正常工作和生活。随着人们对供水质量和供水系统可靠性要求的不断提高，利用先进的自动化技术和控制技术，设计出高性能、能适应高楼供水复杂环境的恒压供水系统成为必然趋势。 本文首先根据管网和水泵的运行特性曲线，阐明了供水系统的变频调速节能原理；具体分析了变频恒压供水的原理及系统的组成结构，通过研究和比较，得出结论:变频调速是当今国际上一项效益最高、性能最好、应用最广的电机调速技术。在控制过程中，电控系统和PID控制由PLC完成，达到控制系统软硬件设计和控制要求。最后对恒压供水进行了经济效益分析，分析的结果表明具有明显的节能效益。 关键词：恒压供水 变频 PLC PID Abstract With our social and economic development and urban construction and development is very quickly, but also for infrastructure construction sets higher demands. The tallest buildings supply system is one important aspect of supply reliability of the economy, stability, directly influences the users work and life. As the water quality and reliability of water supply systems, using advanced automatic technology, control technology and communications technology, high performance, high energy efficient, adaptable to a tall building complex environmental a constant pressure water supply systems become the inevitable trend. This article first according to the manifold and pump characteristics of the curve, the water supply system variable frequency machinery velocity modulation ； Concrete analysis of the principle of energy conservation variable frequency a constant pressure on the principle of supply and the system of structure, by study and comparison and concluded that variable frequency machinery velocity modulation is todays world an efficiency and performance of the best and most of the electrical machinery velocity modulation control procedure. At the pid electrical energy signal control system and the plc, Software and hardware to control system design and control of the claim. Finally, a constant pressure water supply for economic analysis. Analysis showed that the energy efficiency. Keywords：Constant pressure Water Supply；Variable frequency；PLC；PID 目录 摘 要 I Abstract II 1 绪论 1 1.1 引言 1 1.2 本课题产生的背景和意义 2 1.3 变频恒压供水的现况 2 1.3.1 国内外变频供水系统现状 2 1.3.2 变频供水系统应用范围 3 1.4 供水系统的安全性问题 3 1.4.1 水锤效应