电工技师论文变频器在恒压供水中的运用.doc

evaluation of scientific development. Nature security type-nature security is to maintenance people of health value for target, through strengthening security based management, and risk management, and equipment management and technology supervision, ensure production in the people, and real, and system, and system, elements security reliable, and harmony unified, full control various against factors, achieved thought no slack, and management no empty document, and equipment no hidden, and system no blocked, and unit zero non-stopped. Quality and efficiency-quality benefit is to adhere to the enterprise survival, profit and development business truth, adhere to the all activity is economic activity, all costs can be controlled, money should not be wasted management philosophy, management analysis, to improve management quality, improve cost control capacity and market competitiveness. Innovation of science and technology-science and technology innovation is to play the role of science and technology as the primary productive force, active use of new technologies, new materials, new processes, new equipment, increase investment in science and technology, strengthening scientific and technological training, speeding up transforming scientific and technological achievements, forming a number of proprietary technology, enhancing core competitiveness. Resource-saving-the-resources saving enterprise was to reduce coal consumption, water consumption, electricity at the core, enhance the operation of lean management to realize low consumption, high efficiency, reduce production costs. Second is to strengthen the business, financial, material, information and the optimization of organization and management, saving the internal transaction costs. Harmonious development of harmonious development-is to construct a foreign environment for development. XING refers to the internal security firm and internal management of the internal management measures are effective, harmonious. Foreign currency means Enterprise coordinating development of homeopathy, well, get along with the neighbors better. (B) XX 2013 five enterprises building intrinsic safety power company goals are: unplanned outage 0 times. Class of disorders 0, 0 is equivalent forced outage rate. No personal injury accident, material and equipment accidents do not occur, no fire, no environmental pollution accident. Enterprise integrated to achieve zero cases of violation, zero accidents, zero. Quality goal is: when generating capacity 7.5 billion-kilowatt, sales of over 7.11 billion kWh, total profits of 306.6 million Yuan, . BFS+、PI、MIS、SCM Information systems infrastructure, fully integrated information system to realize information resources sharing; to expand the breadth and depth of the portal system, information system of Enterprise Management Assistant role to play; to improve the day-to-day operation and maintenance operation record of promoting causes and transfer system; to strengthen the training23电工技师论文题目：变频器在恒压供水中的运用姓名：穆建良职业：仪表技术员身份证号定等级：维修电工技师（二级）单位：泰柯棕化张家港有限公司 二0一四年8月二十三 日. 目录摘要.3关键词.3 引言.3 第1章 我公司设备现状.4 一，厂区设备供水现状.4 二，技改内容方案.4 第二章 变频器恒压供水的方案 一，背景介绍.5 二，变频器恒压供水的系统组成. 6三，变频器恒压供水控制原理以及参数设定.7 第三章 系统控制以及硬件电路布线I/O分配 一，控制要求.8 二，PLC I/0分配.9 三，外部硬件电路.10 第四章 软件系统设计 一，触摸屏画面制作. （11-13） 二，PLC 程序.（14-21） 第五章 技改效果.22 结论. 23 参考文献 . 23 内容摘要：浅谈我国的恒压供水的现状与未来供水系统是国民生产生活中不可缺少的重要一环。传统供水方式占地面积大，水质易污染，基建投资多，而最主要的缺点是水压不能保持恒定，导致部分设备不能正常工作。变频调速技术是一种新型成熟的交流电机无极调速技术，它以其独特优良的控制性能被广泛应用于速度控制领域，特别是供水行业中。由于安全生产和供水质量的特殊需要，对恒压供水压力有着严格的要求，因而变频调速技术得到了更加深入的应用。恒压供水方式技术先进、水压恒定、操作方便、运行可靠、节约电能、自动化程度高，在泵站供水中可完成以下功能。关键词：变频器 水压恒定 运行可靠 节约电能 引言： 在生产以及消防用水过程中，水压需要恒定保持恒定值，这样才能保证正常的生产以及消防用水，由于我们公司采用的开环点动控制，导致水压不稳定，从而影响生产以以及消防用水的需求。一，厂区设备供水现状我公司厂区用水采用1台7.5KW ABB 132M4A电机，现场点动控制启停，这样控制有如下不足之处：第一，当外供给水管压力波动，厂区压力也会随之波动。第二，操作水泵必须要操作人员到现场启停，生产效率大大降低，第三，如果水泵损坏需要更换时，就没有备用的水泵提供恒定的水压来满足生产消防需求，诸如此类的问题还有很多，这样大大影响了公司的供水系统。二，技改内容方案为了满足厂内有恒定的生产用水以及消防应急用水，同时提高电机的能效比以及利用率，同时减小电能损耗的目的。根据多年岗位经验以及结合相关文献以及资料的学习，我提出了恒压供水方案，利用变频器，PLC控制器，压力变送器，形成闭环控制系统，从而更好的改善水压不稳对生产造成的影响。如图：第二章 变频器恒压供水方案介绍背景：水资源及能源紧缺是制约我国经济发展的重要因素，节水节能是我国社会经济持续发展的基本国策。节能降耗、降本增效也是我公司目前的工作重点。而我公司原供水方案不合理，水泵一旦开始工作，电机便以额定转速运行，并以额定出水量供水，当用水低谷时，管网压力过高，造成输水管道、设备损坏，使水白白流掉，造成水资源浪费；而用水高峰期，开启1台水泵，无法达到额定负荷，水网压力无法保证恒定。用水的多少是经常变动的，因此供水不足或供水过剩的情况时有发生。用水与供水之间的不平衡集中反映在供水的压力上，即用水多而供水少，则压力低；用水少而供水多，则压力高。因此，保持供水压力的恒定，可使供水与用水之间保持平衡，确保系统安全、稳定、长周期运行。如今，随着电子技术的发展，变频器功能日趋完善，性能大大提高。交流电机变频调速技术已是一项广泛应用的节能技术。它可以实现控制电动机软启软停，起动平稳，起动电流可以限制在额定电流以内，从而避免了起动时对电网的冲击；不仅可以降低设备故障率，还可以大幅减小电能损耗。由于泵的平均转速降低了，延长了泵和阀门等设备的使用寿命；消除了水泵起动和停止时的水锤效应。确保系统安全、稳定运行。其稳定安全的运行性能，简单方便的操作方式，及齐全周到的功能，使供水实现节水、节电、节省人力的目标，最终达到高效率的运行目的。因此，采用变频恒压供水技术，可以大大改善供水性能，稳定供水压力，提高产品质量，节本，提高效益。变频恒压供水技术改造方案势在必行。恒压供水控制系统的组成：三菱(FX-2N-32MR)，三菱变频器FR-540，模拟处理模块FX0N-3A，压力变送器等变频器恒压供水的原理：频恒压供水系统以管网水压 (或用户用水流量)为设定参数，通过PLC控制变频器的输出频率从而自动调节水泵电机的转速，实现管网水压的闭环调节 (PID)，使供水系统自动恒稳于设定的压力值：即用水量增加时，频率升高，水泵转速加快，供水量相应增大；用水量减少时，频率降低，水泵转速减慢，供水量亦相应减小，这样就保证了供水效率用户对水压和水量的要求，同时达到了提高供水品质和供水效率的目的，“用多少水，供多少水”；采用该设备不需建造高位水箱，水塔，水质无二次污染，是一种理想的现代化建筑供水设备。变频器参数设定：(1)上限频率：Pr.1=50HZ， (2) 下限频率：Pr.2=30HZ, (3) 变频器基准频率：Pr.3=50HZ， (4) 加速时间：Pr.7=3S， (5) 减速时间：Pr.8=3S, (6) 电子过流保护Pr.9=电动机额定电流 (7) 启动频率：Pr.13=10HZ， (8) 设定端子间2-5间的频率设定为电压信号，0-10V，Pr.73=1 (9) 允许所有参数读写：Pr.160=0 (10) 操作模式（外部运行）：Pr.79=2控制要求： 设计一个恒压供水系统要求如下： （1）只有两台水泵，要求一台泵运行，一台备用，自动运行时泵带倒泵功能，100小时轮换一次。手动时不切换。 （2）两台水泵分别由M1，M2电机拖动，由KM1，KM2控制。 （3）切换后启动和停止后启动需5S报警，运行异常时可自动切换备用泵，并报警。 （4）水压在0-1MPA范围内可以调整，同触摸屏调节。 （5） 触摸屏可以显示设定水压，实际水压，水泵运行时间，系统时间，以及报警。 控制系统的I/O分配： （1）I/O分配： 根据系统要求，运用F940GOT-SWD触摸屏，触摸屏和PLC，输入和输出分配表如下：系统接线： 根据系统要求，PLC选用FX-32MR型，变频器采用FR-540，模拟处理模块采用输入输出混合模块FX0N-3A,变频器通过FXON-3A的模拟输出来调节电机的转速。根据系统I/O分布图，PLC接线如下：触摸屏画面制作：PLC程序设计：技改效果： 通过这次技改，单位厂区用水压有了显著的改善，主要体现在：（1）管道水压平稳可调；（2）效率大大提高，设备一台坏了，自动切换另一台泵以及自动倒泵功能；（3）通过变频恒压控制大大节约了电能。结论： 变频恒压供水系统不仅改善了我们单位供水压力波动的问题，而且大大提高了生产效率，以及降低了电能损耗，解决我们单位由于供水压力不稳产生的种种问题，所以这项技术值得推广。参考文献：张万忠 可编程控制器 姜平 维修电工技师培训教材 朱献清 郑静 电气绘图 姜泓 交流调速系统 supervision in large and medium goods vehicle. A is established large vehicles and small vehicles classification management of motor vehicle test mode, increased medium van car, and dangerous goods transport car, and school car test project; II is established motor vehicle test regulatory platform, achieved motor vehicle test full process video, and data remote regulatory; three is strictly motor vehicle identification management, equipped with unified of identification equipment and tool, using mobile identification Terminal, and law enforcement records instrument, technology identification means. As to 20XX years June 20 statewide motor vehicle keep volume for 567,408 car, and last year earlier than growth 75,814 car, growth 13.36%; this year January-June, vehicles management section and license archives management section total accepted the motor vehicle registration business 42,543 car times, which registered registration 6,905 car times, and transfer registration 3,592 car times, and change registration 1033 car times, and mortgage registration 696 car times, and cancellation registration 187 car times, and into business 980 car times, and Archives corrections 81 pieces times, and issued test qualified logo 25,429 car times, and other vehicles business 3,640 car times; supervision Survey Section relies on motor vehicle detection remote issued test qualified logo software platform supervision motor vehicle test, and identification situation 7418l liangci, investigation motor vehicle exception business 30 car times, his pards business warning 244 article, vehicles and driving people sound video regulatory screenshots 1852 Zhang, checks motor vehicle archives 716 pieces times, and medium bus, and medium above truck, and Of hazardous chemicals, vehicles and school buses and other key vehicle inspection record of 420. (C) based on their own, and strict adherence to defense, more cheating, false false fugitive suspects, robbery suspect vehicles and the Internet crackdown. DMV full play to the first line of Defense position control, investigating cheating, fake identification and robbery suspect vehicles through operational work, and carefully examine the documents and le