外文翻译可编程控制技术在船用锅炉控制系统中的应用精品.docx

外文翻译可编程控制技术在船用锅炉控制系统中的应用精品.docx

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外文翻译可编程控制技术在船用锅炉控制系统中的应用精品

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,Sendsoutthewarning,Boilerblowing-out

（5）FlamesurveillanceunusualinterconnectionWhenappearstheignitiondefeat,themidwayflameoutortheburningconditionworsening,Sendsout"theflamesurveillancetobeunusual"thewarning,Boilerblowing-out

（6）Manual,automaticoperationinterconnectiononlywhencutstheswitchtoset"manually"（"isautomatic"）theposition,onlythenallowscarriesonmanually（isautomatic）alloperations

（7）The#1sprayholedoesnotwork,Ortheairthrottlehasnotstartedinabigway,The#2sprayholedoesnotworkandsoon

3Hardwaredesigns

Thehardwaredesignmainlyrevolvesthesystemthereliabilityandtheconsummationitsfunctiontwogoalcarrieson

3.1PCshaping

Theprogrammableforewordcontrolleruses,theexcellentcraftmanufactureadvanced,itsreliabilityisthegenerallaborcontrolsthemicrocomputer4~6todouble,ThereforeshouldstressfromthecontrolfunctionanglechoosesPC.Regardingthesingleplane,themediumscale,useinguaranteeingtheboilersafeoperationtheautomaticcontrolsystem,Toconservesenergythegoaltobepossiblenottoconsider,ThereforedoesnotneedthePIDcontrolfunctionSuchsystembyconditioncontrol,sequentialcontrolprimarily,Bytheswitchquantitylogicoperation,thetime,countsisinthemajority,Toaspecttheandsooncomponentrunningrateperformancedoesnothavethespecialrequest,Thereforemayactaccordingtotheproceduretoneedthecapacity（IOportnumberandmemorysize）makesthePCshapingThestoragecapacity（procedurestep）may）*∑（IO）maketheestimateaccordingtoempiricalformulaQ=6~10,Iftheuserprogramisnotbig,SavesTheaccumulatorcapacitydemandiseasytosatisfyThissystemaltogethermustinputtheport,outputporteach14（ifincreaseboilerwatermonitorfunction,Mustagainincreasetheinput,outputporteach4）,ThereforeusesMitsubishiCorporationF1-30MRorF1-40MRisthecontrollerF1-30MRisthesubminiatureprogrammableforewordcontroller,Itsinput,outputstheportwithPCmachinetoassembleintogether,DoesnotneedtochoosetheIOmoduleagainF1seriesPCdoesnothavebreakdowntimeintervalMTBFis300,000hours,Themutable（0~+55℃,Work;-15℃~+65℃,Stock）,Bearsthevibration,theimpact（conformstoJISC0911,theC0912standard）,Adoptsthepowersourceprotection,thesupplyvoltagesurveillance,theinstantaneouspowercutcompensates,measureandsoonanti-leveldisturbance,ThereliabilityandtheantjammingabilityareveryhighItalsohasmakesamistakefromthediagnosisability,Includingcirculartelegramdiagnosis,proceduremonitoringdevice（Watchdog）andEOL,MayguaranteethecorrespondenceandtheprocedureexecutionaccuracyF1-30MRhasinputport16,Outputsport14,CansatisfytheprocedureexactlytheneedWhentheexpansionprocedurefunctionalneedincreasestheIOport,Maythroughaffixtheexpansionlist

3.2Powersourcesprotectionsandantjamming

AlthoughPChasthegoodpowersourceadaptiveness,Alsoshouldtakethemeasurefromtheelectricalpowersystem,Reducesintheinstallmentpowersupplyasfaraspossiblethedisturbance,theundulation,owespresses,theinstantaneoushighpressuretothesystemtheinfluenceTherefore,UsesintheelectricalpowersystemSeparationpowersourcepowersupply,insulatingtransformerandpowerfailureprotectorPCmachine,theinputcircuitandtheoutputcircuitbyseparatethepowersource,throughtheinsulatingtransformerpowersupplyInsulatingtransformershieldlevelgoodearth,ThesecondaryoutputusesthetwistedpairlineThesemeasuresregardingsuppressintheelectricalnetworkandmixintheinputoutputcircuitthedisturbancetocausetheproceduredisoperationtohavethegoodeffectTheinsulatingtransformerusesthehighqualityhighmagnetic-fluxdensitynottohavecutsthecircularcross-sectioncore,Losesslightly,Enabletheequipmentanti-voltageundulationtheabilitytoobtaintheenhancementFrontendtheoutputcircuitpowersourcehasalsoestablishedtheemergencypowerfailureswitch,Whenhastheemergencycase,Maythedump,Protectionsystemsecurity

3.3IOallocationandexteriorcircuitdesign

ControlsystembyPCmachineandinputandoutputcircuitconnectionconstitution,EachpartindependentlysuppliespowerbyelectricalnetworkPS,Seeschart1.Theinputcircuitdividestheexaminationinputcircuitandtheoperationinputcircuittwokinds:

TheexaminationinputcircuitreceivesthelighttocontrolthelightwhichthetubeandthesensorcontrolstocontroltheswitchandmagneticcontactorG,Si（i=1,2,）AndPCinputportconnection,Pot

ThestoveconditioninformationfeedbackgivesPC.Operationinputcircuitbutton,change-overswitchandsoonandPCinputportconnection,ToPCtransferoperationorderInthecontrolsystemmovementfixedtimeandthesteampressure,thetemperatureand