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PLC的智能樓宇供水系統設計+梯形圖

時間:2019-06-21 19:38來源:畢業論文
基于西門子S7-200系列PLC控制的變頻供水系統,本文介紹了該控制系統的節能原理、系統構成和工作原理。通過PLC進行邏輯控制,變頻器進行壓力調節,PLC還能切換變頻和工頻

摘要:在傳統的供水系統通常存在供水壓力不穩、水泵效率低等缺點從而導致水資源的浪費。隨著社會的發展和進步,城市高層建筑的供水問題日益突出。一方面要求提高供水質量,不要因為壓力的波動造成供水障礙;另一方面要求保證供水的可靠性和安全性。針對這兩方面的要求,這就要求一種新的供水方式,這里我們采用PLC控制的恒壓供水系統。該供水系統對水壓實時控制性能良好,硬件模塊工作穩定、可靠,達到了恒壓供水系統的要求。本系統的設計是基于西門子S7-200系列PLC控制的變頻供水系統,本文介紹了該控制系統的節能原理、系統構成和工作原理。通過PLC進行邏輯控制,變頻器進行壓力調節,PLC還能切換變頻和工頻,從而使得閉環自動調節恒壓,進行變量供水。基本實現了高質量恒壓供水、降低點電能損耗等優點。36501
畢業論文關鍵詞: PLC,變頻調速,恒壓供水。
Design of intelligent building water supply system based on PLC
Abstract:In the traditional water supply system usually exists the water supply pressure instability, the low efficiency of the pump and so on, which leads to the waste of water resources. With the development and progress of the society, the water supply problem of city high-rise building is becoming more and more prominent.On the one hand, it is demanded to improve the quality of the water supply, not because of the fluctuation of the pressure caused the water supply barrier. On the other hand, the reliability and safety of the water supply are guaranteed.. In view of the two requirements, this requires a new water supply, here we use the constant pressure water supply system PLC control. The water supply system has good performance of real-time control for water pressure, and the hardware module is stable and reliable, and it can meet the requirements of constant pressure water supply system. The design of this system is based on the frequency conversion water supply system of SIEMENS S7-200 series PLC control, this paper introduces the energy saving principle, system constitution and working principle of the control system. Through PLC logic control and the pressure adjustment by inverter ,PLC can also switch frequency and power frequency, so that the closed-loop automatically adjust the constant pressure, variable water supply. It has basically realized the advantages including the high quality constant pressure water supply ,low power loss and so on. 源¥自%六:維;論-文'網=www.aftnzs.live
Key Words: PLC; frequency control of motor speed; constant pressure water supply.
目  錄
1緒論    1
1.1 課題背景及意義    1
1.2 變頻恒壓供水系統的國內外研究現狀    1
1.3 本課題的主要研究內容    2
2變頻技術及PLC技術簡介    3
2.1變頻器技術概述    3
2.1.1 變頻技術簡介    3
2.1.2 變頻器結構分類    3
2.1.3 變頻調速技術的特點及應用    3
2.2 PLC技術簡介    4
2.2.1 PLC的基本概念    4
2.2.2 PLC的基本結構    4
2.2.3 PLC的工作原理    6
2.2.4 PLC應用范圍    6
2.2.5 西門子S7-200系列概述    7
3系統理論分析    8
3.1 供水系統的要求    8
3.1.1 供水系統運行分析    8
3.1.2 供水系統的特性分析    8
3.1.3變頻變壓原理    9
3.1.4供水系統的結構    10
3.1.5 主要組成    10
3.1.6 系統總原理框圖    10
4基于PLC的智能樓宇供水系統設計方案    11
4.1 系統的硬件設計    11 PLC的智能樓宇供水系統設計+梯形圖:http://www.aftnzs.live/zidonghua/20190621/34986.html
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