峰谷自动切换新型增压供水控制系统的设计(含CAD图)(开题报告,论文说明书9000字,CAD图9张)
摘 要
随着我国社会经济的发展，污染越发严重，水资源越来紧张，且由于人类习性，一天之内不同时段用水量差异很大。所以设计出能高效利用电能源，满足人们在不同时段的用水需求，既能再用水低谷期降低能耗，又能在用水高峰期充分供给水源。
本设计采用变频恒压供水变频调速技术，用两台变频器分别控制两台水泵，分别抽管网和水箱，用PLC进行控制，在用水低谷期只抽管网完成供水，而在用水高峰期同时抽水箱以达到目标。根据控制目标,设计控制电路图并用CAD制图画出，编写PLC程序，实现触摸屏组态（Wincc flexible）并模拟运行，实现工业控制过程。
通过试运行，本设计在满足高层住户的正常用水量的前提下有效的降低了能耗，小区供水能够切换峰谷，合理的运用市政管网的初始压力。
关键词：PLC，恒压供水，叠压，峰谷自动切换
New type of booster water supply control system with automatic switching of peak and valley
Abstract
With the development of social economy in our country, pollution is more serious, water resources increasingly tense and due to human behaviour, one day different time differences in water consumption greatly. So the design of efficient use of electrical energy to meet people in different periods of water demand, both water trough to reduce energy consumption, and the peak in the water sufficient supply of water.
This design by frequency conversion water supply of constant pressure variable frequency speed control technology, with two inverters respectively control two pumps, were pumping pipeline and water tank, control with PLC, the water trough only smoke pipe network to complete the water supply, and the peak in the water while pumping water tank to reach the goal.According to the control target, design the control circuit diagram and draw the CAD drawing， the preparation of PLC program, the design of the touch screen (flexible Wincc) simulation, realize the industrial control process.
This design can effectively reduce the energy consumption under the premise of meeting the normal water consumption of high level residents, and can switch peak and valley in residential water supply, and reasonable initial pressure of municipal pipe network.
Key words: PLC, Constant pressure water supply,Laminated, Peak and valley automatic switching.
1.3本课题的内容
本设计主要是针对小区内高层（7层以上）二次增压供水问题[16]。不但在管网原有的压力下直接叠压，降低能耗，而且增加蓄水池，解决用水高峰期水量不足和用水低谷期水压过高的问题[12]。本设计主要包括以下3个方面。
1查阅资料，了解本课题
查找关于二次增压供水方面的资料，熟悉现代供水模式。并且完成一篇与本课题相关的英文翻译。
2硬件设计
主要包括PLC的选择，主控制电路的设计，系统中各元器件的介绍及选型和CAD精确制图。
目录
摘 要 I
Abstract II
第一章 绪论 1
1.1 供水技术发展现状 1
1.2 变频恒压供水的研究意义 2
1.3本课题的内容 2
第二章 硬件设计 3
2.1 PLC的选择 3
2.1.1 PLC的诞生 3
2.1.2 PLC的特点 3
2.2 控制电路 4
2.3 选型 9
2.3.1 流量及扬程计算 9
2.3.2 泵型选择 10
2.3.3 断路器，接触器选择 10
2.3.4 计数器，热继电器选择，电流电压变送器 11
第三章 软件设计 12
3.1 触摸屏设计 12
3.2 PLC编程 17
参考文献 26
致谢 27
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