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主井箕斗动态定重装载系统的研制
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摘要
目前我国煤炭系统提升机所采用的控制方法。基本上可分为定容、定重、定时三种方式。定容、定时往往因煤炭水份、灰份、矸石含量的不同及煤位测量误差等因素影响,易造成超载等事故的发生,通常作为备用方式。定重装载系统则容易正常掌握和控制提升载荷,是矿井提升机系统实现自动化和安全生产的一个重要手段。
     本课题所设计的动态定重装载系统所采用的是液压式称重方法,由压力变送器测量称重液压缸下腔及管路中密封油液的压力,通过定重装载液压系统对箕斗进行定重装载,利用PLC作为系统的控制核心,设计并使用了一套立井箕斗定重装载系统,经过几个月的运行实践,该系统运行稳定、可靠,能提高装载的自动化程度,很好的实现了箕斗提升的定重装载。
     根据矿山的特殊环境,对动态定重装载系统的液压部分进行设计与计算,其中包括液压系统设计设计依据、工况分析、称重液压系统原理图的拟定、液压元件的选择、系统的性能估算等等,并对动态装载系统进行的硬件设计与软件开发。
     通过对定重装载系统进行实验室试验,从试验的角度采集一些实测数据,来证明所采取的控制方式的可行性,并利用测试得到的数据来分析本定重装载系统稳态性和动态特性,通过不断的调整来改进系统,使之完善。
     对该系统进行了现场的工业性实验,以王石凹煤矿为现场进行了安装、调试、实验、数据采集与分析等,对现场遇到的问题能够进行排查与处理,使之可以实现箕斗的定重装载,并符合《煤矿安全规程》的规定。
At present, the methods used in our country coal system elevator may be basically divided into there ways: Volume-fixed、Weight-fixed、Timing. Volume-fixed and Timing are easy to create the overloading accident because of the influence factor of the different content between coal moisture, Ash Content, and gangue and the measurement error of coal level and so on, so they are usually spared. Weight-fixed Loading System which is easy to grasp normally and to control the lifting load is the important way to achieve the automation and safety production in the mine hoist system.
     In this paper the design method of Weight-fixed Loading System uses the hydraulic way which uses the Pressure Transmitter to measure the inferior vena of hydraulic cylinder and the sealing oil pressure in pipeline, loads the fixed weight coal to the skip through Weight-fixed Loading System, and takes the PLC which is the control core in this system to design the Weight-fixed Loading System of the Shaft Skip. After several months' practices, the system is stable and reliable and improves the loading automatization and realizes the weight-fixed loading to the skip.
     According to the mine special environment, the hydraulic factors in the Dynamic Weight-fixed Loading System are designed and computed, including the design request and the design basis of the hydraulic system、the working condition analysis、the drafting of weighting hydraulic system principle diagrams、the choice of hydraulic components and the system performance evaluation and so on.we have designed the hardware and developed the software in the Dynamic Weight-fixed Loading System.
     Through the laboratory test to the Weight-fixed Loading System, collecting some measured data proves the feasibility of using control way, and uses the measured data to analyze the stability and the dynamic characteristic to this system, and improving the system through the unceasing adjustment.
     Making the industry experiment and taking the Wang Shi'ao mine to be the experiment, we has carried on the installment, the debugging, the experiment, the data acquisition and the analysis and so on, and some questions in the scene can be examed and treated, and carrying on the weight-fixed loading to the skip, which is suitable to "Coal mine Safety regulation".
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