双恒压无塔供水制系统设计.doc

摘 要 该毕业设计对环保、节能、自动补压型给水设备作了介绍。从的实践出发，阐述了给水设备中的应用。以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。智能水压控制系统的基本控制策略是：采用电动机调速装置与可编程控制器（PLC）构成控制系统，进行优化控制完成供水压力的恒定控制，当流量变化来达到稳定的供水压力和节约电能系统的控制目标是泵的出口压力、系统设定的压力值和反馈给水压力实际值进行了比较处理后的差输入逆变器，发出控制指令，控制泵电动机的投运台数和运行变量泵电动机的转速，从而达到给水总管压力稳定在设定的压力值上。PLC控制器，压力传感器，变频器PID运算，双恒压供水。 ABSTRACT The graduation design of environmental protection, energy saving, automatic type pressure feed water equipment are introduced. Starting from the practice of energy saving technology, and expounds the double constant pressure no tower water supply system for high-rise buildings water supply equipment application. Circuit with PLC control method, this paper introduces the working principle of hydraulic control system and PLC intelligent control system. On the basis of analyzing the working process of the hydraulic control, PLC control system hardware and software design are given. Intelligent hydraulic pressure control system of the basic control strategy is: USES motor drive device and a programmable controller (PLC) control system, optimization control, complete water pressure constant control, when the network traffic variation to achieve stable water supply pressure and save power. Control objectives of the system is always pump outlet pressure, system pressure set value and feedback feed pressure compares the actual values. After treatment the difference between the input inverter, sends out control instructions, control stations and pump motor was put into operation of variable pump motor speed, so as to achieve stable water supply main pipe pressure on the set pressure value. Keywords PLC controller，pressure sensors，inverter PID arithmetic，the double constant pressure water supply.  目 录 摘 要 I ABSTRACT II 1 绪论 1 1.1 选题的意义和背景 1 1.2 双恒压供水系统简介 1 1.3 本文的主要内容 2 2 恒压供水的基本构成 3 2.1 总体概述 3 2.2 设计内容 3 2.3 控制要求 3 2.4 变频恒压控制理论模型 4 3 变频器与压力传感器的选型 5 3.1 变频器的介绍 5 3.2 变频器的基本结构 5 3.3 变频器的分类和工作原理 7 3.4 变频器的操作方法和使用 8 3.5 变频器的选型 8 3.5