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1、 深井减压供水论文：煤矿千米深井自动减压供水系统研制【中文摘要】水是生命之源。同样,供水在煤矿上也是生产的源泉,离开了水源,整个矿井就无法生产。采用自动化控制设备和技术实现恒压供水,是供水领域技术革新的必然趋势。虽然国内外已经对恒压供水这一问题进行了许多相关的研究,但井下恒压供水的问题研究的比较少,而这恰恰是煤矿经营和安全生产中迫切需要解决的问题。本文是在深入分析和参阅大量文献的基础上,通过阐述当前矿井供水系统的现状,分析了现有煤矿井下供水系统的局限与不足,根据恒压变频供水系统的特点,提出了基于井下测压井上变频节能控制的深井自动减压供水方案。该供水系统打破了原有井底建池,水泵供水的传统供水模式
2、,实现了深井减压供水,对提高我国煤矿井下供水自动化水平具有很好的参考价值。根据所提出的控制方案,结合唐口煤矿千米深井的实际情况,运用MATLAB仿真软件对现场进行了模拟仿真,经反复调试后初步确定了系统的控制参数,并详细地设计了一套智能减压供水控制系统。该系统主要由单片机井下测压控制系统和PLC、变频器井上节能控制系统组成。在千米深井下通过压力传感器对信号进行采集,经放大与A/D转换后,通过单片机将信号进行处理,然后通过ADAM-4520转换模块和ADAM-4510模块将信息远距离传送到地面PLC控制器,PLC接受信息并结合控制要求进行PID运算,根据运算的结果去控制变频器的电压与频率,通过改变
3、电机的转速来改变供水量,保证井下供水压力稳定在设定值附近。本文针对该矿减压供水系统进行了软、硬件设计。硬件设计主要包括单片机对两路压力信号的高精度A/D变换电路,信号远距离传输的实现电路,PLC的外围接线电路,变频机泵切换控制主电路等。软件设计主要包括单片机数据采集与处理程序、PLC串行数据接受与校验程序、压力恒定控制程序、机泵增减控制程序和报警程序的设计。为了能够及时掌握系统的运行状态,采用WinCC flexible 2005组态软件,通过触摸屏对系统进行了监控,系统界面友好。【英文摘要】Water is the source of life. Similarly, the water s
4、upply in the coal mine is also the top priority and leave the water, the whole mine can not be produced. Automation control equipment and technology to achieve constant pressure water supply, is an inevitable trend in the field of technological innovation of water supply. Despite this constant press
5、ure water supply at home and abroad have already conducted a number of related studies, the underground water supply constant pressure studies of relatively is small. That is precisely the coal mine operations and safety issues to being addressed urgently.Based on a large number of literature search
6、 and analysis, This paper introduces the current status for the mine water supply systems, analyses the limitations and inadequacies of the existing water supply systems in underground coal mines and characteristics of constant pressure water supply system, proposes automatic decompression deep wate
7、r supply programs based on downhole pressure measurement, frequency conversion and energy conservation on well.The water supply system breaks the original construction of the traditional water supply pool pump model in the bottom, to achieve decompression of the deep water, enhancing the level of au
8、tomation in China coal mine water which has a very good reference value.According to the proposed control schemes, combined with actual situation of tang mouth coal kilometers deep well, with MATLAB simulation software for field simulation, after the repeated testing the system control parameters pr
9、eliminarily determines, and carefully designed a set of intelligent decompression water supply control system. The system is mainly composed of the control system of single-chip microcomputer underground pressure measuring and PLC, and the system of aboveground energy saving control transducer. The
10、signal acquisition under a kilometer deep well through the pressure sensor, after enlargement and the A/D transformation, after the signal processing using single chip processor, then transmits through the ADAM-4520 transformation module and the ADAM-4510 module the information long-distance range t
11、o the ground PLC controller. PLC accepts the information and carries on the PID operation according to the control requirements, and according to the operation results to control the voltage and frequency of inverter, by changing the motor speed to change water, guaranteed that the mine shaft water
12、supply pressure stabilizes nearby the setting value.This article has carried on the software and hardware design in view of reduced pressure water supply system.The hardware design mainly includes high-precision A/D converter circuit of two pressure signal by single-chip microcomputer,the circuit of
13、 long-distance transmission signal,the circuit of PLC periphery wiring,the control circuit of frequency changer pump switching and so on.The software design mainly includes the procedure of single-chip data acquisition and disposal,the procedures of PLC serial data receive and data validation,the co
14、ntrol procedure of constant pressure,the control procedure of water pump fluctuates and the warning procedure.For grasping systems running status promptly,in this article,we carried on the monitoring through the touch-screen to the system through using WinCC flexible 2005 configuration softwares,and
15、 the system user-friendly.【关键词】深井减压供水 变频技术 数据采集 PID控制【英文关键词】deep water decompression data acquisition PID control【目录】煤矿千米深井自动减压供水系统研制摘要6-7Abstract7第一章 绪论8-131.1 课题研究的背景81.2 国内外变频供水系统的发展概况8-101.3 项目研究的目的意义10-111.4 课题的关键技术11-13第二章 变频减压供水的理论分析13-242.1 水泵及供水电机13-152.2 电机的变频调速15-182.3 供水压力与变频器输出频率的关系18-212.4 供水系统的能耗分析21-24第三章 减压供水系统的构成及控制原理24-323.1 减压供水系统的构成方案24-283.2 变频泵的控制方案28-293.3 供水系统加减泵的控制29-32第四章 系统建模仿真32-384.1 系统建模324.2 PID控制32-374.3 仿真结果374.4 结论37-38第五章 减压供水系统的主要硬件设计38-615.1 系统概况385.2 变频电机的确定38-395.3 变频器的选型39-415.4 系统硬件的设计
