文献翻译可编程控制技术在船用锅炉控制系统中的应用.docx

文献翻译可编程控制技术在船用锅炉控制系统中的应用.docx

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文献翻译可编程控制技术在船用锅炉控制系统中的应用

TheapplicationofPLCtechniqueinthecontrolofmarineboilers

Programmableforewordcontroller,IscalledPCorPLC,ItappearscausesthecontroldomainfacedwithatechnicaltransformationTaketherelayasthefoundationengineroomcontroldevicestructurecomplex,thecomponentaremany,Thereliabilityisbad,ThebreakdownsometimesoccursThecurrentourcountryshipsusetheimportcompletesetcontroldevice,Itsfunctionconsummates,Thereliabilityisalsohigh,ButthepriceisexpensiveNumberyearago,IuseimportPLCamthecontroller,Owndesignthehardware,Establishmentcontrolprocedure,DevelopssuccessfullythePC-GCprogrammableboilercombustioncontrolinstallment,SubstitutesfortheEnglishHAMWORTHYCorporationproductInthenearfuturethesimilarproductwillcomparewiththiscompany,Performancequite,Thepriceonlyisits12.5~13.4year,AltogetherhasPC-GCtoinstall12setsinDazing414andsoon6Stripoiltankersolidshipuse,ExperiencestheSouthChinaSeastormandthenearly70℃hightemperatureadversecircumstancetests,Movesgood,DoesnothaveabreakdownTheexperienceindicated,Introducestheminorityessentialcomponent,Accordingtoconcretecontrolsystemrequest,Designstheappropriatesoftwareandthenecessaryhardware,Istheshipstechnologicaltransformationsandtheequipmentdispositiongoodmeans

1systemcomposition

Thesystemiscomposedbybelowseveralparts:

ProgrammableforewordcontrollerPC;PowersourcePS;ExaminationunitCooperationunitOB;ActuationunitM;DisplaymonitorIB;AuxiliaryrelayunitJB;LinebankL,Likechart1showsThefirstsixpartsarethecontroldevicebasiccompositionThisinstallmentadditionallybuildsauxiliaryrelayunitJBincludingfour8portsintermediaterelayJ1,J2,J3andJ4and12portslightcontrolsrelayJGC.Whenthecontrolleroutputmustactuatethehigh-powerload,NeedstocarryonthevoltageorthepowerconversionthroughtheintermediaterelayTheintermediaterelaybesidescompletesthehostwhichitundertakestocontrolthefunction,Alsoprovidesmanyvice-auxiliaryports,Mayusefortheinterconnectionrelatedequipmentorputthroughtheconditionindicatinglamp,DoesthismaysavethehosttocontroltheunitthehardwareresourcesAfterestablishmentlinebank,Thepowersource,thePCboard,examinethecomponent,carriesoutthecomponent,operatesthebutton,thedisplaylampandsoonthecompletecontactalllinkstothelinebankplugin,Thisfortheequipmentsetup,theserviceandthesearchbreakdownhasprovidedtheconvenienceSystemeachpartofcompositionsandconnection。

2Systemscontrolsrequest

2.1Burningmanagementcontrol

（1）FueloilchoiceThefuelmaychoosetheheavyoilorthelightoilIfchoiceheavyoil,Theoiltemperaturemustin80℃above,ThesidecancarryonburningTheoiltemperatureislowerthan80℃,Thenblowing-out,Andthestartheatsuptheinstallmenttoheatuptotheheavyoil

（2）CombustioncontrolAccordingtothestart,frontsweepsthegas,theignition,opensthe#1sprayhole,opensthe#2sprayholetheordertostartboilerburning;Afterclosesthe#2sprayhole,closestheorderblowing-outwhichthe#1sprayhole,sweepswasmad

（3）SteampressureintermittentcontrolAccordingtoboilersteampressurepANDgatelimitingvaluep1（0.7MPa,p2（approximately0.6MPa）controlstwosprayholesapproximately）theworkWhenp>p1,#1,the#2sprayholecloses;Whenp1>p>p2,The#1sprayholealoneworks;Whenp2>p,#1,the#2sprayholeopens。

（4）Boilerwatermonitortheboilerwaterlevelusesthepairofpositioncontrolmode,whichknewverywell,Therefore,doesnotgiverelatesindetail

2.2Interconnectionprotections

（1）SteamoverpressureinterconnectionThesteampressurearrivesreportstothepolicethresholdvaluep0（approximatelytime0.72MPa）,Sendsout"thesteamoverpressure"thewarning,Blowing-out,Andshutsofftheloadpowersource,Stopstoallexecutionscomponentpowersupply

（2）TheboilerwaterlevelreportstothepoliceTheestablishmenthighreportstothepolicethewaterlevelandthelowestdangerwarningwaterlevelWhencontrolsmalfunctions,Thewaterlevelsurpassesreportstothepolicethewaterlevel,Thensendsoutthehighwatermarktoreporttothepolice,AndshutsoffthefeedpumpelectricmotorpowersourceWhenthewaterlevelislowerthanthedangerwarningwaterlevel,Thensendsoutthelowwaterleveltoreporttothepolice,Boilerblowing-out。

（3）Theemergencyblowing-outprotectsWhenthecollectioncontrolsTaiwantohavetheblowing-outtoorder,Thensendsout"theemergencyblowing-out"thewarning,Boilerblowing-out

（4）HeavyoiltemperaturecontrolinterconnectionWhenchoiceheavyoil,Theoiltemperatureishigherthan80℃procedurestobeabletomoveTheoiltemperaturelowlyislowerthanthisvalue,S