矿井提升机电控系统的研究与设计

发布时间：2018-02-10 14:17

本文关键词： 提升机电控双PLC 安全回路触摸屏　出处：《安徽理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：矿井提升机主要负责矿物质、人员和物资的运送,在煤矿的生产中起着重要的作用。为了使煤矿企业的生产不受到影响,矿井提升机需要在矿井中高速往复运行。如果提升机在运行中出现故障,轻则设备损坏、生产停止,重则人员伤亡。故矿井提升机系统需满足生产效率高、安全可靠和自动化控制的运行要求。本文针对同煤集团某矿副井提升机电控系统升级改造的项目,制定了矿井提升机电控系统方案。该项目主要完成了提升机电控系统的硬件选型,电路和软件程序的设计。根据矿井提升机的运行特性,电控系统的变频调速系统由工控机监控。电控系统主要由变频调速系统、下位机(PLC),上位机(触摸屏)组成。电控系统采用双线制PLC对提升机进行控制。PLC选用的是西门子S7-300系列。软件灵活、硬件简洁、维护量小。一套PLC作为主控系统；另一套作为监测系统,检测提升机系统的各种故障,并将故障事件传往触摸屏。PLC间互为备用,以保证提升机无间断地进行运行。电控系统减少了继电器和控制线的使用,提高了系统的可靠性和稳定性。电气拖动单元使用的是风光高压四象限变频技术。该变频器以IGBT为主控器件,以DSP为控制核心,采用矢量调速控制技术。只要通过PLC给出对变频器的控制命令,提升机就可以按着预先设计的速度曲线运行。电控系统用EasyBuilder8000对威纶MT8121IE触摸屏进行组态。触摸屏对提升机的运行状态进行实时的监控。若故障发生,触摸屏会记录保存故障事故且发出蜂鸣警告。为了保障提升机的安全运行,本文设计了软、硬两套安全回路。安全回路间相互独立,为断轴、错向、制动油压过高、上下过卷、高压断路、编码器异常、闸瓦磨损、松绳等故障提供安全保护。若安全回路中的故障事件一旦发生,安全回路会立即断开,而后提升机立即执行一级或二级制动。
[Abstract]:Mine hoists are mainly responsible for the transportation of minerals, personnel and materials, and play an important role in the production of coal mines. The mine hoist needs to run at high speed in the mine. If the hoist fails in operation, the equipment will be damaged, the production will be stopped, and the heavy person will be killed and injured. Therefore, the mine hoist system should meet the high production efficiency. Operational requirements for safe, reliable and automatic control. Aiming at the project of upgrading and transforming the electric control system of auxiliary shaft hoist in Tongshan Coal Group, a scheme of mine hoist electronic control system is established. The project mainly completes the hardware selection, circuit design and software program design of the hoist electronic control system. According to the operation characteristics of mine hoist, the frequency conversion speed control system of the electronic control system is monitored by the industrial control computer, which is mainly composed of the frequency conversion speed regulation system, the lower computer and the upper computer (touch screen). The electric control system adopts two-wire PLC to control the hoist. The Siemens S7-300 series is selected. The software is flexible, the hardware is simple and the maintenance is small. One set of PLC is used as the main control system and the other as the monitoring system. Detect all kinds of faults of hoist system, and pass the fault events to touch screen. PLC for each other, to ensure the hoist runs uninterruptedly. The electric control system reduces the use of relay and control line. The reliability and stability of the system are improved. The electric drive unit uses four quadrant frequency conversion technology of wind and high voltage. The frequency converter takes IGBT as the main control device, DSP as the control core, and vector speed control technology. As long as the control command of the converter is given through PLC, The hoist can run on a pre-designed speed curve. The electronic control system uses EasyBuilder8000 to configure the MT8121IE touch screen. The touch screen monitors the running state of the hoist in real time. If the fault occurs, the touch screen will record the trouble and issue a buzzer warning. In order to ensure the safe operation of hoist, this paper designs two sets of safety circuits, soft and hard. The safety circuits are independent of each other, which are broken shaft, wrong direction, high braking oil pressure, overwinding up and down, high pressure open circuit, abnormal encoder, brake shoe wear, etc. Loose rope and other faults provide safety protection. If a fault event occurs in the safety loop, the safety loop will be disconnected immediately, and the hoist will immediately carry out the first or second stage braking.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD633

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