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1、摘要建设节约型社会，合理开发、节约利用和有效保护水资源是一项艰巨任务。根据高校用水时间集屮，用水量变化较大的特点，分析了校园原供水系统存在成本高，可靠性低，水资源浪费，管网系统待完善的问题。提出以利用自来水水压供水与水泵提水相结合的方式，并配以变频器、软启动器、PLC、微泄露补偿器、压力传感器、液位传感器等不同功能等传感器，根据管网的压力，通过变频器控制水泵的转速，使水管屮的床力始终保持在合适的范围。从血可以解决因楼层太高导致床力不足及小流量时能耗人的问题。另外水泵耗电功率与电机转速的三次方成正比关系，所以水泵调速运行的节能效果非常明显，平
2、均耗电量较通常供水方式节省近四成。结合使用可编程控制器，可实现主泵变频，副泵软启动，具有短路保护、过流保护功能，工作稳定可靠，大大延长了电机的使用寿命。关键词：恒丿玉变频供水PLC丿力差供水自动控制ABSTRACTBuildingtheconservation-orientedsociety,thereasonabledevelopment,savesandtheeffectiveprotectingwaterresourcesisanarduoustask.Becentralizedaccordingtotheuniversitywate
3、rusedtime,thewaterconsumptionchangemajorcharacteristic,analyzedthecampusoriginalwatersupplysystemexistencecosttobehigh,thereliabilitywaslow,thewaterresourceswaste,thepipenetworksystemtreatedtheconsummationthequestion.Proposedthatdrawswaterthewaywhichusingtherunningwaterhyd
4、raulicpressurewatersupplyandthewaterpumpunifies,andmatchesbytheinverter,thesoftstarter,PLC,Microrevealsthecompensator,thepressuretransmitter,thefluidpositionsensorandsoon.accordingtothenetworkmanagementpressure,controlswaterpump'srotationalspeedthroughtheinverter,causesinw
5、aterpipespressuremaintainsatthroughouttheappropriatescope,thusmaysolvetheproblemwhichthefloorhighpressureistooinsufficientwhensmallcurrentcapacitytheenergyconsumptionisbig.Moreoverthewaterpumpconsumestheelectricpowerandtheelectricalmachineryrotationalspeedisproportionalthr
6、eecubedtherelations,thereforethewaterpumpvelocitymodulationmovementsenergyconservationeffectisobvious,theaveragepowerconsumptionusualwatersupplywaysaves40%.Theunionusestheprogrammablecontroller,mayrealizethemainpumpfrequencyconversion,theauxiliarypumpsoftstart,hastheshortc
7、ircuitprotection,theoverflowprotectionfunctionstably,theworkreliable,lengthenedelectricalmachinery'sservicelifegreatly・Keywords:ConstantpressurefrequencyconversionwatersupplyPLCdifferentialpressurewatersupplyautomaticcontrol屮英文摘要I第一章绪论41.1恒压供水问题的提出41.2国内恒压供水系统的现状51.2.1国内恒压
8、供水系统研究状况51.2.2各类供水系统的比较61・3本课题的总体方案71.3.1系统的总体布局图71.3.2系统的总体方案71.3.3本系统的特点81.4本课题的主要工作9第二
