新型立井箕斗定重装载系统的设计开发.docVIP

摘 要 针对国内部分箕斗提升系统不能实现定重装载的问题，本课题采用液压式的称重方法和PLC控制技术，研制了一套矿用立井箕斗定重装载系统。文中对定重装载液压系统进行了动态性能研究，分析了管路参数对液压系统动态特性和称重精度的影响，阐述了PLC及模拟量输入模块的选型与I/O点数的分配，建立了PLC控制的硬件接线图及相应的软件控制流程，最后，对定重装载系统进行了实验研究，研究结果表明该系统能有效提高箕斗提升的自动化程度和生产安全性。本课题的主要研究内容如下： (1)以煤矿为例，分析现场条件，根据实际工况，对定重装载系统进行了设计，得出了液压系统原理图、PLC的接线图、控制流程图和MCGS软件监测界面。 (2)基于PLC的控制系统采用“一用一备”冗余设计方法，具有可靠性高、操作简单等特点，基于MCGS组态软件的上位机具有工作状态监测、故障诊断和报表打印等功能。 (3)本课题以煤矿所使用的定重装载系统为实验模型，进行了实验室实验研究和现场实验研究，实验内容包括液压系统的启动及运行、受冲击、实验室模拟装载过程和生产现场装载等，并从试验的角度得到了一些实测数据。通过分析，这些数据基本与理论分析结果相一致，表明该立井箕斗定重装载系统可应用于矿山生产现场。 关键词：箕斗；定重装载；管路； PLC ABSTRACT For the problem of partly old main shaft’s skip hoist systems cannot achieve weight-fixed loading, this paper adopted hydraulic-weighing method and programmable logic controller, designed the main shafts skip weight-fixed loading system. The paper researched the dynamic characteristic of hydraulic system, analyzed the impact of weighing accuracy and dynamic characteristics of the hydraulic system on the pipeline parameters, expounded the selection on the PLC and analog input module, and the distribution on I/O points, established the diagram of the PLC and controlled flow chart. And last, the main shafts skip weight-fixed loading system is studied experimentally. The results showed the main shaft’s skip weight-fixed loading system can increase the degree of automation loading and safety production. The main contents of the research are as follows: (1)The design of weight-fixed loading system focus on mine, in accordance with the site and actual conditions, the paper obtained the principle chart of weight-fixed loading hydraulic system, drew the diagram of the PLC, control flow chart and MCGS-based monitoring interface. (2)The PLC-based control system used the method of one-up redundancy design, with high reliability, operated easily and other features, the MCGS-based monitor computer system has the functions of working condition monitoring, fault diagnosis, statements printing and so on. (3)Based on the weight-fixed