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小型配料搅拌装置电气系统设计毕业论文最终完成版本要素.doc

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宜宾职业技术学院 毕业论文(设计) 小型配料搅拌装置电气系统设计 系 部 专 业 名 称 班 级 姓 名 学 号 指 导 教 师 2016年 月 日 摘 要 本文介绍的配料搅拌系统以PLC作为控制核心,结合变频器等完成配料搅拌的自动控制系统,能够较好的满足搅拌系统的要求。 本设计运用了变频电机M1,恒速电机M2,液位传感器,搅拌电机M3,皮带秤等主要器件,以PLC为控制核心,选用了西门子公司的S7-1200系列机PLC,西门子生产的变频器MM420,ZDSN型电子式电动双调节阀,SS.45-HSP-100型静压式液位变送器,ICS-ST4型电子皮带称,还有断路器,熔断器,热继电器等多种电路保护元件,运用PLC编程语言,以及人机界面控制面板,用PLC的S7_200的仿真软件进行仿真,实现了对不同的配料按预先设定的程序进行混合搅拌的功能。 关键词:可编程控制器PLCS7-1200;变频器MM420;电动调节阀;配料搅拌系统;PID控制;电动调节阀 ABSTRACT With the development of modern industrial technology, material mixing technology has been rapid development, it is widely used and the chemical technology and production, but in the application, the traditional material mixing process also exists serious problems and capacity constraints。Computer technology as the core of PLC in the general automatic control equipment, it is a kind of program to change control function of the computer. As microprocessors, computer and communication technology, the rapid development of PLC programmable controller has widely applied in industrial control, and the proportion of the rapid rise in. PLC mainly consists of CPU module, input and output module and programming module device. It is applied in industry, mixing equipment mixing process realized automation control, and improved the stability, agitate equipment work for the mixing machine smoothly, orderly, accurate working creates powerful guarantee. In this paper, the material mixing system with PLC as control core, combined with frequency converter, etc material stirring of the automatic control system. Key words: PLC programmable controller S7-1200;frequency converter MM420; material mixing system;PID control; Electric control valve 目 录 1绪 论 1 1.1 传统的配料混合设备的控制存在的问题 2 1.2 配料设备的发展趋势用PLC来代替传统配料混合设备控制 2 1.3 引入PLC来实现其配料混合设备的控制功能 3 2整体框架 4 2.1 总体方案论证 4 2.2 系统方案的设计思想 6 2.3 系统设计 6 3硬件设计 10 3.1 硬件系统构成原理 10 3.2 硬件系统器件选型 11 3.3 系统安全性,可靠性、实用性设计 31 4程序设计 38 4.1 PLC编程语言 38 4.2 程序梯形图 39 4.2.1
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