400KW真空氮化烧结炉电气控制系统的设计

毕业论文（设计）题目：400KW真空氮化烧结炉电气控制系统的设计中原工学院信息商务学院毕业论文（设计）I摘要真空脉冲氮化炉氮化工艺是在低真空状态下进行，自动变压换气，使炉罐内每一个角落的气氛保持新鲜、活性，具有速度快，炉内气氛均匀性好。炉子密封性好、硬度高、装炉量大、加工成本低、脆性低、工艺稳定、操作简单、残余氨气经真空泵抽至密封水箱处理后排出，残余氨气与水箱中的FeSO4消除后排出，对大气不造成污染，达到节能环保型产品。本文结合电气工程自动控制方法，提出了以PLC为核心的自动控制，构建了以PLC为中心控制器分别控制各个控制系统的自动控制系统，得出了真空氮化炉的电气控制系统设计的结论。本设计共分四部分，第一部分：无水指示及报警设计，第二部分：温度检测及监控设计，第三部分：抽真空系统设计，第四部分：正反向调压的电气控制系统设计，设计中均严格按照有关标准和规程而设计关键字：氮化炉，PLC，自动控制中原工学院信息商务学院毕业论文（设计）II400KWvacuumnitridingsinteringfurnaceelectricalcontrolsystemdesignAbstractVacuumpulsenitridingfurnacenitrideinlowvacuumcondition,theautomaticpressureventilation,sothatthefurnacetankeverycornerofatmospherefreshkeeping,activity,hastheadvantagesoffastspeed,gooduniformityoffurnaceatmosphere.Thestovehasgoodsealingproperty,highhardness,loadingcapacityoflarge,lowprocessingcost,lowbrittleness,processstability,simpleoperation,residualammoniabyvacuumpumptoasealingwatertankisdischargedafterthetreatment,theresidualammoniaandwatertankintheFeSO4eliminatedafterdischarge,theatmospheredoesnotcausepollution,toachieveenergyconservationandenvironmentalprotectionproducts.Thiscombinationofelectricalengineeringautomaticcontrolmethod,putforwardtothePLCasthecoreofautomaticcontrol,tobuildaPLCasthecentercontrollerrespectivelycontrolseachcontrolsystemautomaticcontrolsystem,thevacuumnitridingfurnaceelectricalcontrolsystemdesignoftheconclusion.Thedesignconsistsoffourparts,thefirstpart:absoluteindicationandalarmdesign,partsecond:temperaturedetectingandmonitoringdesign,partthird:vacuumsystemdesign,partfourth:positiveandnegativevoltageoftheelectricalcontrolsystemdesign,designinstrictaccordancewiththerelevantstandardsandrulesanddesignBrieflyKeywords:nitridingfurnacePLCautomaticcontrol中原工学院信息商务学院毕业论文（设计）III目录1绪论...........................................................................................................................11.1课题研究的背景............................................................................................11.2400KW真空氮化烧结炉电气控制系统的设计的目的和意义......................21.2.1400KW真空氮化烧结炉电气控制系统的设计研究的目的...............21.2.2400KW真空氮化烧结炉电气控制系统的设计研究的意义...............21.3本设计的任务..................................................................................................22系统方案论证............................................................................................................42.1系统总体设计框架........................................................................................42.2系统方案论证................................................................................................42.2.1控制电路核心部分..............................................................................42.2.2控制器模块部分..................................................................................42.2.3无水指示报警部分..............................................................................62.2.4抽真空控制部分..................................................................................62.2.5风机降温排风部分..............................................................................63系统硬件设计............................................................................................................73.1可编程逻辑控制器介绍.................................................................................73.2硅钼棒介绍..................................................................................................143.3PID介绍.......................................................................................................153.4支路控制系统设计......................................................................................213.4.1PLC控制电路.....................................................................................213.3.2调压模块............................................................................................224系统软件设计..........................................................................................................244.1主程序模块..................................................................................................245电路的调试.............................................................................................................255.1硬件调试.......................................................................................................255.2软件调试......................................................................................................26结论................................................................................................................................27致谢................................................................................................................................28参考文献........................................................................................................................28中原工学院信息商务学院毕业论文（设计）IV附录1系统原理图.....................................................................................................29附录2程序清单.........................................................................................................30中原工学院信息商务学院毕业论文（设计）11绪论1.1课题研究的背景近年来，随着经济的发展和工业化程度的逐渐提高，氮化工业产品的重要性同益增大。研究表明，良好