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變頻恒壓供水系統(tǒng)畢業(yè)設計說明書-展示頁

2024-08-18 01:56本頁面
  

【正文】 章 變頻恒壓供水系統(tǒng)的軟件設計 42 系統(tǒng)水泵運行狀態(tài)及轉換過程分析 42 PLC程序設計方法的分析 44 系統(tǒng)控制程序設計 47 變頻器P l D控制功能參數的設置 51 PID控制及其控制算法 51 恒壓供水PID調節(jié)過程分析 53 變頻器PID控制參數的設置 53 可靠性分析 55 本章小結 55第五章 變頻恒壓供水遠程監(jiān)控系統(tǒng)的設計 57 S7200系列PLC的監(jiān)控方法 57 本系統(tǒng)計算機監(jiān)控內容及原理圖 57 本章小結 59第六章 結 論 60 本課題研究結論 60 課題存在問題與展望 60參考文獻 61外文翻譯 62致 謝 86附 錄 87第一章 緒 論 課題背景及意義 眾所周知,水是人類生活、生產中不可缺少的重要物質,在節(jié)水節(jié)能已成為時代特征的現實條件下,我們這個水資源和電能短缺的國家,長期以來在市政供水、高層建筑供水、工業(yè)生產循環(huán)供水等方面技術一直比較落后,自動化程度低,而隨著我國社會經濟的發(fā)展,人們生活水平的不斷提高,以及住房制度改革的不斷深入,城市中各類小區(qū)建設發(fā)展十分迅速,同時也對小區(qū)的基礎設施建設提出了更高的要求。本人授權      大學可以將本學位論文的全部或部分內容編入有關數據庫進行檢索,可以采用影印、縮印或掃描等復制手段保存和匯編本學位論文。本人完全意識到本聲明的法律后果由本人承擔。除了文中特別加以標注引用的內容外,本論文不包含任何其他個人或集體已經發(fā)表或撰寫的成果作品。作 者 簽 名:       日  期:        指導教師簽名:        日  期:        使用授權說明本人完全了解 大學關于收集、保存、使用畢業(yè)設計(論文)的規(guī)定,即:按照學校要求提交畢業(yè)設計(論文)的印刷本和電子版本;學校有權保存畢業(yè)設計(論文)的印刷本和電子版,并提供目錄檢索與閱覽服務;學校可以采用影印、縮印、數字化或其它復制手段保存論文;在不以贏利為目的前提下,學??梢怨颊撐牡牟糠只蛉績热?。盡我所知,除文中特別加以標注和致謝的地方外,不包含其他人或組織已經發(fā)表或公布過的研究成果,也不包含我為獲得 及其它教育機構的學位或學歷而使用過的材料。通過對計算機和PLC之間通信協議的研究,完成了上、下位機的通信設置,給出了計算機監(jiān)控程序編寫方法,通過通信模塊實現了對供水系統(tǒng)的遠程監(jiān)控和故障報警。論文論述了采用多泵并聯供水方案的合理性,分析了多泵供水方式的各種供水狀態(tài)及轉換條件,分析了電機由變頻轉工頻運行方式的切換過程及存在的問題?;谒霉┧髁亢退棉D速的三次方成正比,論文分析了采取變頻調速方式實現恒壓供水相對于傳統(tǒng)的閥門控制恒壓供水方式的節(jié)能機理。系統(tǒng)有效地解決了傳統(tǒng)供水方式中存在的問題,并具有多種輔助功能,增強了系統(tǒng)的可靠性。傳統(tǒng)的恒速泵加壓供水、水塔高位水箱供水、氣壓罐供水等供水方式普遍不同程度的存在效率低、可靠性差、自動化程度不高等缺點,難以滿足當前經濟生活的需要。蘭州理工大學畢業(yè)設計說明書摘 要 隨著我國社會經濟的發(fā)展,住房制度改革的不斷深入,人們生活水平的不斷提高,城市中各類小區(qū)建設發(fā)展十分迅速,同時也對小區(qū)的基礎設施建設提出了更高的要求。小區(qū)供水系統(tǒng)的建設是其中的一個重要方面,供水的經濟性、可靠性、穩(wěn)定性直接影響到小區(qū)住戶的正常生活和工作,也直接體現了小區(qū)物業(yè)管理水平的高低。本論文針對住宅小區(qū)的供水要求,設計了一套由PLC、變頻器、遠傳壓力表、多臺水泵機組、計算機、通信模塊等主要設備構成的全自動變頻恒壓供水及其遠程監(jiān)控系統(tǒng),具有全自動變頻恒壓運行、自動工頻運行、遠程手動控制和現場手動控制等功能。并和計算機實現了有機的結合,提升了系統(tǒng)的總體性能。通過對變頻器內置PⅢ模塊參數的預置,利用遠傳壓力表的水壓反饋量,構成閉環(huán)系統(tǒng),根據用水量的變化,采取PD調節(jié)方式,在全流量范圍內利用變頻泵的連續(xù)調節(jié)和工頻泵的分級調節(jié)相結合,實現恒壓供水且有效節(jié)能。給出了實現有效狀態(tài)循環(huán)轉換控制的電氣設計方案和PLC控制程序設計方案。關鍵詞:恒壓供水;PLC;變頻調速AbstractAlong with the development of the socio—economy of our count,the housing system is going deep into reforms,and people’s living standard is being improved.At the same time,in the city,each kind of sub—district constmction is developing very quickly,which puts forrward higher requirement for the infrastru construction of subdistrict.And the construction of subdistrict water supply system is an important aspect in which.The reliability,stability and economy of water supply directly affects sub—district Households nomal life and work,and also embodies the difference in the level of subdistrict property management.The traditional means of water supply such as the pump pressurization water supply at constant speed,water tower of upper cistem,the jaretc. are hard to satisfy the needs of current economic life, because low efficiency,reliability and automation level are all monly existing in these means.According to the requirement of water supply in a abiding place,a set of automatic system of constant pressure water supply by using variable frequency and remote monitofing and rolling,wrhich is posed of PLC,transducer,pressure sensor,pumps and electro—motors,puter and device of munication is designed to that end.This set of system has the functions like automatic constant pressure operation by using variable frequency,automatic work frequency operation,and the function of longrange conrol by hand and the onthe—spot control by hand etc.The system has solved efficiently the problem existing in the traditional way of water supply,which has various supplementary functions to strengthen the reliability.The system has an organic bination with puter and promotes the systematic overall performance.Based on that the three side of the pump water delivery rate and the pump rotational speed bee direct ratio,the paper analyses the mechanism of energy saving that the way of water supply by using the method of variable velocity variable frequency is superior to the traditional way of constant pressure water supply controlled by valve. Setting up in advance the parameter of the PH modular builtin the transducer,a system of closed circuit using the feedback of hydraulic pressure of far.biograhy pressure table has formed.According to the change of water consumption,with PID,in the sphere of whole rate of now bining the constant regulation of the pump offrequency conversion with the work frequency pump grade regulation,the system of closed circuit can realize the constant pressure water supply and save energy efficiently. This paper discusses the reasonability of water supply scheme with much pump parallel connection,and analyses the conversion condition and the various states of water supply of the much pump way of water supply as well as the switch process and the problem of a generator from variable frequency operation mode to work frequency operation mode. This paper has also given the electrical design scheme and PLC controlling program scheme that realizes effective state circulating conversion control. By researching the munication agreement between the puter and PLC,this paper has finished setting up the munication between upper and lower puter,and also has described the method to pile puter monitoring program to realize the long—range monitoring and fault reporting for water supply system through munication modular Key words:Constant pressurewatersupply;PLC;Variable velocity variable frequency; Constant pressurewatersupplyKey words:Constant presrewater supply;PLC;Variable Velocity Variable fequency;Constant pressurewatersupply畢業(yè)設計(論文)原創(chuàng)性聲明和使用授權說明原創(chuàng)性聲明本人鄭重承諾:所呈交的畢業(yè)設計(論文),是我個人在指導教師的指導下進行的研究工作及取得的成果。對本研究提供過幫助和做出過貢獻的個人或集體,均已在文中作了明確的說明并表示了謝意。作者簽名:        日  期:         學位論文原創(chuàng)性聲明本人鄭重聲明:所呈交的論文是本人在導師的指導下獨立進行研究所取得的研究成果。對本文的研究做出重要貢獻的個人和集體,均已在文中以明確方式標明。作者簽名: 日期: 年 月 日學位論文版權使用授權書本學位論文作者完全了解學校有關保留、使用學位論文的規(guī)定,同意學校保留并向國家有關部門或機構送交論文的復印件和電子版,允許論文被查閱和借閱。涉密論文按學校規(guī)定處理。小區(qū)供水系統(tǒng)的建設是其中的一個重要方面,供水的可靠性、穩(wěn)定性、經濟性直接影響到小區(qū)住戶的正常工作和生活,也直接體現了小區(qū)物業(yè)管理水平的高低?。 水塔高位水箱供水具有控制方式簡單、運行經濟合理、短時間維修或停電可不停水
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