中英文翻译-起重机发展史、分类及前景

毕业设计中英文翻译Cranehistory,classificationandprospects起重机发展史、分类及前景

Concept

Crane(Crane)isakindoflifting,IsaforloopIntermittentmotionmachinery.Aworkcycle,including:Extractplantextracttotheitemsfromtheinstitute,ThenmovetothedesignatedlocationloweredthelevelofitemsThen,thereversemovement,Backtoextractdeviceinsituforthenextcycle.

Usuallybythecranehoistingmechanism(theitemsupanddownmovement),

Operatingagencies(theliftingmovement),

Luffingandslewingmechanism(thearticlesforthehorizontalmovement),

Coupledwiththemetalbody

Powerplant,

Controlandmanipulationofacombinationofthenecessaryauxiliaryequipment.

Type

Inthebridgeusedintheconstructioncrane,AccordingtoitsstructureandpropertiesofdifferentCanbedividedintolightandsmallliftingequipment,Bridgetypecraneandjibtypecranethreecategories.Small-sizedliftingequipmentsuchas:Jack,Gourd,Winchandsoon.Suchasthetypeofcranegirderbridgecranes,Gantrycranes.

Typeofcraneboom,suchasfixedslewingcranes,

Towercrane,

Crane,

Tires,

Crawlercranes.

Withinacertainrangetoenhancetheverticalandhorizontalmulti-actionheavyliftingcrane.

Alsoknownasthecrane.

Arematerialhandlingmachinery.

Crane'sworkischaracterizedbyintermittentexercisetodo,

Thatisexpectedtotakeaworkcycle,

Migration,

Unloadingthecorrespondingbodyisalternatelymovesthework.

Prototypecrane

AncientChineseirrigationoffarmlandisusedorangeprototypetypecranes.The14thcentury,WesternEurope,humanandanimal-drivenemergenceoftherotationtypecranes.Early19thcentury,Therebridgecrane;ImportantwearpartssuchascraneshaftSpreaderandothergearandbegantousemetalmaterials,andintroducingthehydraulicdrive.Thelate19thcentury,Graduallyreplacedsteam-drivencranecranewithhydraulicdrive.20thcentury,20's,theelectricalindustryandtherapidindustrialdevelopmentofinternalcombustionengines,Tomotororinternalcombustionpowerplantbasicallyformedofvariouscranes.

Cranesincludehoistingmechanism,

Runinstitutions,

Luffing,

Slewingmechanismandmetalstructure.

CranehoistingmechanismisthebasicworkingbodyMostlyformedbythehangingsystemandwinch,Alsoliftheavyobjectsthroughthehydraulicsystem.Operatingagenciestoadjusttheverticalorhorizontaltransportheavycranesworkingposition,Generallybythemotor,Reducer,Brakeandwheelcomponents.Luffingjibcraneinonlywith,theWhenlookedupandboomamplitudeandBentoverwhentherateincreases,Pointsamplitudebalancebothamplitudeandnon-equilibrium.Slewingmechanismforrotatingthearm,Bythedriveandtherotarybearingdevicecomposition.Cranemetalstructureistheskeleton,Mainbearingpartssuchasbridge,Armandthedoorframestructureorfortheboxtrussstructure,butalsoforwebstructure,Someareavailableassupportingsteelbeams.

Craneaccordingtothestructureofthedifferentclassification:

Cranebeam

1

Beamcrane.

Overarectangularspaceinitsoperations,

Usedforworkshops,

Warehouse,

Openyardloadingandunloadingofgoods,etc.,

Abeamcrane,

Crane,

Gantrycranes,

Crane,

Carryingbridges.

①beamcrane:

Beamcranesincludingsinglegirderoverheadcraneanddoublegirderoverheadcrane

Singlegirderoverheadcranegirderbridgeofthewordtousemoresteelorsteeltypeandsteelcompositesection.

Craboftenhandchainhoist,

Hoistelectrichoistorliftingmechanismasassembledparts.

Supportedbybridgetypeandthehangingoftwo.

Theformerbridgecranebeamalongtheorbitvehicles;

Thelattersuspensionbridgealongtheroofoftheplantunderthecranetrack.Singlegirderoverheadcranepointsmanually,Electrictwo.Manualsinglegirderoverheadcraneoperatingspeedofthelowerbody,Startingweightisalsosmaller,Buttheirqualityissmall,Facilitatetheorganizationofproduction,Lowcost,Whenthepowerhandlingcapacityfornon-small,Speed​​andproductivityforlessdemandingapplications.

ManualSingle-girderoverheadcranewithmanualmonorailcarasarunningcar,

Handpullhoistastheliftingbody

Bridgefromthemainbeamandsidebeamsformed.

GenerallyusethesinglemainbeamI-beam,

Endbeamisbentshapewithasteelorweldedsteelplate.

Electricsinglegirderoverheadcranespeed,

Higherproductivitythanmanual,

Fromtheweightaswell.

Electricsinglegirderoverheadcranebythebridge,

Travelingmechanism,Electrichoistandelectricalequipmentcomponents.

②bridgecrane:

Overheadbridgecraneisabridgeintheorbitofabridgecrane,

Alsoknownasthecrane.

Thebridgecranelayalongtheelevatedtrackintheverticalsidesofruns

Liftingtrolleyalongthetracklaidonthebridgeonthehorizontalrun

Thescopeofworkconstitutesarectangular,

Cantakefulladvantageofthespaceundertheliftingbridgematerials

Groundequipmentisnothindered.

Bridgecraneiswidelyusedinindoorandoutdoorstorage,

Plant,

Pierandopenstorageyard,etc..

Overheadcranebridgecranecanbedividedintoordinary,simplebeambridgecraneandmetallurgicalthreespecialcrane.

Generalbridgecraneliftingtrolleygenerally,Bridgeruninstitutions,Bridgethemetalstructures.Crabandthehoistingmechanism,Carruninstitutionsandsmallframeofthreeparts.

Liftingmechanismincludingmotors,

Brakes,

Reducer,

Reelsandpulleys.

Motorthroughreducer,

Drivendrumrotation,

Theropearoundthedrumorfromthereeldown,

Toliftheavyobjects.

Issupportingforsmallframeandinstallationofliftingthecartoruninstitutions,agenciesandchassiscomponents,

Usuallyweldedstructure.

2

Cantilevercrane(jibcrane)

Cantilevercranewithhighcolumn,

Wall,

Threeformsofbalancecrane.

①isacantilevercranecantilevercolumncanbefixedaroundthecolumnbasefixedontherotary,Columnwiththetransferorrigidcantilever,Togetherwithinthebasesupportintheverticalcenterlineofrotationrelativetothecolumnsandcantileverformedbythecantilevercrane.Itappliesfromtheweightofsmall,Operatingrangeofservicestoroundorfanoftheoccasion.Generallyusedformachinetoolsandhandlingtheworkpiecechucking.

Pillarjibcranestousemoreelectricchainhoistforliftingmechanismandoperationofinstitutions,

Lessuseofwireropehoistandchainhoists.

Rotationandhorizontalmovementtousemoremanualwork,

Onlyfromtheweightofthelarger

Whenusingelectric.

②wallcraneissecuredtothewallonthecantilevercrane,

Oryoucanalongthewallorothersupportstructureonanelevatedtrackrunningonthecantilevercrane.

LinewherethewallusingacranetospanalargerLargeworkshopbuildingheightorwarehouse,Closetothewallneartheliftingoperationatthemorefrequentthemostsuitable.Multi-walllineandthetopofthecraneorbridgecranebeamwiththeuseofNearthewallattheserviceinarectangularspace,Responsiblefortheliftingoflightandsmallobjects,Largebridgecranefromthebeamorcommitment.

③balancecranebalanceknownashoists,

Itistheprincipleoftheuseoffour-barlinkagetobalancetheweightloadandformabalancedsystem,

Spreaderusingavarietyofflexibleandcaneasilyloadbeingliftedinthethree-dimensionalspace.

Balancecranelightweightandflexible,

Isanidealliftingsmallitemsofliftingequipment,

Iswidelyusedinfactoryfloormachineloadingandunloading,

Processbetween

Automaticline

Productionlineoftheworkpiece,

Sandboxlifting,

Partsassembly,

Andthestation,

Terminals,Warehousevariousoccasions

Craneorganizationsdrive

Canbedividedintotwomaincategories:OneforfocusdriverThatisdrivenbyanelectricmotoronbothsidesoftheactivelong-wheelshaftdrive;Theotherforeachdriver,Thatisactiveonbothsidesofeachwheeldrivenbyanelectricmotor.InMorefrequentuseofsmallcranebrake,Gearandmotorcombinedintooneofthe"tripleplay"Drive,Fromtheweightofalargebridgecraneforthegeneraleaseofinstallationandadjustment,Universalcouplingdriveisoftenused.

Structurecrane(crane)runinstitutionsgenerallytaketheinitiativeanddrivenbyfourwheels,Iftheeffectisveryheavy,Commonlyusedmethodstoincreasethewheeltoreducewheelpressure.WhenmorethanfourwheelswhenMustbebalancedwitharticulatedframedeviceThecrane'sloadevenlydistributedthroughoutthewheel.

Bridge'smetalstructurefromthemainbeamandsidebeamscomposedof

Dividedintosingle-anddual-beambridgegirderbridgetypes.

Single-girderbridgebyasinglespanbothsidesofthemainbeamandintheendbeamcomposition

Double-beambridgeconsistsoftwomainbeamsandsidebeamsformed.

Themainbeamandsidebeamsrigidlyconnected

Endbeamatbothendswithwheels,

Tosupporttheelevatedbridgeintherunning.

Themainbeamweldedtrack,

Forliftingthecarrunning.

Bridgegirdertypeofstructuremoretypicalofaboxstructure,

Fourtrusstrussstructureandfasting.

Boxstructurecanbedividedintotwo-trackboxbeams,

Partialdouble-railboxbeam,

Partialrailbox,suchasseveralsinglemainbeam.

Double-trackboxbeamiswidelyusedasabasicformFromthemainbeamonUnderbothsidesoftheverticalflangeandwebcomponents,CarrailarrangedinthecenteroftheflangeonthelineItsstructureissimple,Theconvenience,Suitableformassproduction,However,largerself.

Partialdouble-railboxrailboxbeamandpartialcrosssectionofasinglemainbeamaremade​​onthe

Rangingfromundertheflangeandwebthicknessofthemainandauxiliarycomponents,

Arrangedinthemainwebofrailcarabove

Cabinetscansaveshort-stiffeners,

Onesiderailboxisasinglemainbeamboxgirderflangewidthinsteadoftwomainbeams,

Weightless

However,morecomplexmanufacturing.

Fourfromthefourtrussstructuretoformclosedspaceplanetrussstructure

Trussinthehorizontalsurfaceispavedwalkwaypanels,lightweight,

Stiffness,

Butcomparedwithotherstructures,Sizelarge,CreatemorecomplexLowerfatiguestrength,Havelessproduction.

Partialfastingtrussstructuresimilartotherailboxgirder,

Platebythefourformaclosedstructure,

Inadditiontothemainwebisarealbelly-sectionbeams,the

Theremainingthreepiecesofsteelplatecutintomanywindowsinaccordancewithdesignrequirements,

Theformationofanon-fastingtrussdiagonals,

Inthelast,

Thesurfaceofahorizontaltrusswalkwaylinedwithboards,

Craneagenciesandelectricalequipmentinstalledinthebridgehouse,

Lighterweight,

Overallstiffness,

ThisisamorewidelyusedinChinaasatype.

Generalbridgecranemainlyelectricallydriven,

Controlroomisusuallythedriver,

Thereareremotecontrol.

Fromtheweightofuptofivehundredtons,

Spanofupto60meters.

Simplebeambridgecrane,alsoknownasbeamcranes,Thestructureandcompositionsimilartoordinarybridgecrane,Startingweight,Spanandthepaceofworkaresmall.

Bridgegirderorotherbeambybeamandplatesteel,consistingofasimplebeam,

Handpullorelectrichoistastheliftinghoistcoupledwitheasytrolleycar,thecarisgenerallyI-beam'sbottomflangeontherun.

Bridgecanberunalongtheelevatedtrack,

Canalsobeelevatedalongthesuspensioninthefollowingorbit

Thisiscalledhangingbeamcranecranes.

Metallurgycraneinthesteelproductionprocesstoparticipateinaparticularprocessoperation,

Thebasicstructureandgeneraloverheadcranesimilartothe

However,liftingasmallcarisalsoequippedwithaspecialworkingbodyordevice.

ThecranesfeatureistheuseoffrequentBadconditionsHigh-levelwork.Therearefivetypes.

Simplebeambridgecranetype

Castingcrane

Castingcrane:

Forliftinghotmetalintothemixer,

Steel-makingfurnacesandthemoltensteelintoacontinuousingotliftingequipmentoringotmoldsused.

MasterShengcarliftingbarrels,

Sheng,deputycartoflipbucketandotherauxiliarywork.

Tongscrane:

Usetongstoheatingotverticallyliftedontoasoakingpitfurnace,

Orputitoutintothecarshippedspindles.

Offingotcrane:

Ingotfromtheingotmoldusedintheextrusionforce.

Smallcaroffthetabletshaveaspecialdevice,

Wayofftheingotingotmoldaccordingtotheshapeoftheset:SomeoffthetabletpressandholdtheingotrodCraneYongxiang,

Ingotmoldwithtongslift;

Somepressandholdtheingotmoldwithtongs,Ingotwithasmallclamplift.

Chargingcrane:

Addedtothechargeintheopenhearth.

Columnwiththebottomofthemaincarpickrod,

Andtostiritintothefurnacehopper.

Themaincolumncanturnaroundtheverticalaxis,

Picktherodcanswingupanddownandrotating.

Vice-carheatersandotherauxiliaryoperationsfortherepair.

ForgedCrane:

Cooperationwiththehydraulicpressforforgingalargeworkpiece.

Specialhooktohangthemaincarturnedfeeder,

Tosupportandfliptheworkpiece;

Vice-cartolifttheworkpiece.

Gantrycranes:bridgesetthelevelofsupportlegsformtwogantrycraneshapeofabridge.

Thecraneonthegroundorbit

Mainlyusedinopenstorageyard,

Dock,

Powerplants,

Portsandrailwaystationsandotherplacescargohandlingandinstallation.Gantrycranehoistingmechanism,CarruninstitutionsandbridgestructuresBasicallythesamewiththebridgecrane.Thespan,CranebodiesweredrivenmostlybywayofTopreventthecranehaveskewingincreasedrunningresistanceEvenaccidents.Gantrycraneliftingtrolleyrunningonthebridge,Somecrabisatypecranes.Bridgeonbothsidesofthelegsaregenerallyrigidlegs;Spanofmorethan30meters,Sideoftherigidlegsoften,Whiletheothersideofthebridgeconnectionthroughtheballjointsandflexiblelegs,Thedoorframetobecomestaticallydeterminatesystem,ThispreventstheouterlateralthrustloadscausedbytheadditionalstressCanalsocompensatefortemperaturedeformationofverticalbridgegantrycraneswindarea,topreventthedeclineinthestrongwindlinesoroverturned,Withwindinstrumentandwiththeoperatingagenciesofthecranerailclampinterlock.Bothendsofbridgecanbenocantilever;Canalsobeoneendorbothendsofthecantilevercantilever,Toextendtheoperatingrange.Oneendofahalfbridgeleggantrycrane,Theotherendwithoutlegs,Rundirectlyonthehighbench.Gantrycranesaredividedinto4types.

①Generalgantrycrane:

Themostversatilecranes,

Canmoveintoavarietyofitemsandbulkmaterials,

Fromtheweightof100tons,aspanof4to35meters.

Commonwiththegantrycranegrabahigh-levelwork.

②HydropowerStationGantryCrane:mainlyusedforliftingandopeningandclosinggates,butalsofortheinstallation.80to500tonsliftingcapacity,smallspan,8to16meters;Lowerliftingspeedfor1to5m/min.Theliftingcranes,thoughnotalways,Butoncetheworkisveryheavyuse,Sotoimprovetheappropriatelevel.

③shipbuildinggantrycrane:

Berthassemblyforthehull,

Standingwithtwocrab:

Therearetwomainhookone,

Flangeofthebridgeontheorbit;

AnotherhasamainhookandaVice-hook,

Inthebottomflangeoftherailbridgerun

Toflipandhoistingalargehullblocks.

Weightisgenerallyfrom100to1500tons;

Spanof185meters;

Liftingspeedof2to15m/min,

Thereare0.1~0.5m/minmicrospeed.

④containergantrycrane:

Forthecontainerterminal.

TrailerBridgetoQuaycontainercarryingcontainersunloadedfromtheshiptransportedtotheyardortherear,bythestackingcontainergantrycraneloadingupordirectlyaway,youcanspeedupthebridgeorothercranecontainercarryingturnover.

Canbestackedhigh3to4layers

6rowwidecontaineryard,

Generaltiretype,italsousesrailstyle.

Containergantrycranesandcontainercross-carcomparison

Thespanandheightofdoorframeonbothsidesofthelarger.

Tomeetthetransportationneedsoftheport,

Thehigherlevelworkcrane.

Liftingspeedof8to10m/min;

④carryingbridge

Increasethespanofthedevelopmentbythegantrycranefromabridgecrane,

Alsoknownastheloadingbridge.

Foropenstorageyard,

Portandrailwaycargoterminalsandotherplaces.

Generaldeliveryoflargegantrycranebridgeandasimilarstructure.

Featuresare:

①mainlyforhandlinglargequantitiesofbulkmaterials;

②span,

Generallymorethan30meters,

Some170meters;

③jobsfrequently,

Highproductivity,

Generally500to1,500tons/

When

Workingspeedishigh,

Liftingspeedof60to70m/

Points,

Carspeedis100~350m/Points,High-levelwork;④runinstitutionsonlycarrythebridgetoadjusttheworkingposition,Non-workinstitutions.Whenthespanislarge,Thebridgeofthebridgecarryingonarigidsupportlegsandaflexiblesupportlegs.Bridgewithtwolegscanbeboltedconnection;Connectionwiththeflexiblelegscanalsobeballjointsorcolumnjoints,Relativetotheflexiblelegscanhavearangeofskewbridge.

Formedbythetrussgirderbridge,

Crabinitswindingrodorbottomchordofthetrack.

Somecarswithrotaryboom,

Theequivalentofarunonthebridgetypecranes.

Containerwharfintheportcarryingthebridgeisrunning,

Isaspecialstructureoflargecranes,

Dedicatedtotheship'scontainerhandlingwork.Bothsidesofthegenerallyrigidlegs,Theformationofasoliddoorframe,Bridgebearingfusedwiththedoorframeontheupperframe.Withacontainerspreader(seecross-car)thecartorunonthebridge.Longcantileverextendingtowardtheseaisusuallytopitchin.Non-operationalstate,Cantilevercanbeliftedat80°~85°ElevationDepartmentTocarryoverthebridgetothehighestpointontheship.Operationscantileverflat.Alsosomecantileverisfixed.

2.

Doublegirderbridgecrane

Doublegirderbridgecranefromthestraighttrack,

Cranegirder,

Crab,

Powertransmissionsystemsandelectricalcontrolsystem,

Particularlysuitedtolargehangingfromtheweightoftheplaneandlargerangeofmaterialhandling.

3

Typecranes.

Andoverintheroundgroundoperations,

Usedforopen-airloadingandunloadingandinstallation,etc.,

Acrane,

Floatingcranes,

Mastcrane

Walllineofcranesanddeckcranes.

4

Towercrane.

Generallyusedinthesite,

Liftingsupplies.

5

Portalcrane.

Oh,generallyusedfortheport.

Inaddition,

Cranescanalsodrive,

Typeofwork,

Mobilityanduseofsuchclassification.

Craneaccordingtothedifferentinstallationmethodscanbedividedinto:

1

TruckCrane

TruckCrane

Willbeinstalledinthegeneralorspecialcranechassisoflowdiskperformanceisequivalenttothetotalweightofthetruckthesamevehicle,Meetthetechnicalrequirementsforroadvehicles,Thusthevarioustypesofroadpassage.SuchcranestypicallyavailableonOffthetwocontrolrooms,Operationsmustbeextendedlegstable.

Weightrangefromlarge,

From8tonsto1,000tons,

Axlechassisnumber

From2to10.

Isthelargestoutput,

Themostwidelyusedtypeofcrane.

2

TireCrane

Liftingpartofthepneumatictireinstalledonaspecialcranechassis.

Combinedwithanengineonandoff,

Speed​​isgenerallynotmorethan30KM/H,

Vehiclewidthiswider,

Itisnotappropriatelong-distancedrivingonthehighway.

Withnolegsandhoists,travelinghoistsfeaturesForthefreightyard,Terminals,Moveawayfromthesiteandotherplaceswithlimitedliftingoperation.

3

Off-roadtirecranesare70developedacrane,

Itsfunctionandtirehoistcranesimilarto

Canalsobecarriedoutwithoutlegsandhoists,travelinghoists.

Thedifferenceisthechassisstructureandchassisbytheuniquestructurebringsimproveddrivingperformance.

Theenginesaremountedonthecranechassis,thechassishastwoaxlesandfourlargediameteroff-roadtirepattern.

Fourwheelsaredrivingwheelsandsteeringwheel,

Whenthemuddyuneventransferstationsite,the

Fourwheelsistransmittedpower,

Thefour-wheeldrive,

Toimprovethroughthemuddygroundandunevenroadability.

Whentheflatsurfacemovingatarapidpace,FrontaxleorrearaxlewithonlytwowheelsdrivenToreduceenergyconsumption.Randomfileatthecrane,Expressedby4×4wheeldrive,4×2,saidfouraxleswithtwowheelsinthewheel.Themodelforsmallvenuework.Canachieveacontinuoussteplessvariablespeed,Resistancemutationsinthecaseoftheroadwillnotturnofftheengine,Thusagreatconveniencetothedriver'soperation.Theoff-roadtirescanbeaperformanceextensionofthecrane,andPowerfulandflexibletirecrane.

4

AllTerrainCrane

Isanoff-roadcranetruckcraneandboththecharacteristicsofhighperformanceproducts.

Itcannotonlytransferasfastascranes,

Long-distancetravel,butalsotomeetinthenarrowandbumpyormuddyfieldontheworkrequest,Thedrivingspeed,Multi-bridgedriverAll-wheelsteering,Threeturnaroundmode,groundclearancelargeHigh-climbingability,Noneedforfeaturessuchasliftinglegs,Isaverypromisingproduct.Butthepriceishigher,Ontheuseandmaintenancerequireahigherlevel.

5

Crane

Aspecifictasktocompletethedevelopmentofspecialcrane.

Forexample:

Theimplementationoftacticalandtechnicalsafeguardstomechanizeduse,

Off-roadvehiclesorarmoredpersonnelcarriersmountedonthecranewheelrescuevehicle;

TodealwithroadtrafficaccidentsWrecker,etc.

Fallintothiscategory.

CraneJobType:

Referstohowbusythecraneandloadtheparametersofdegreeofchange.

BusyworkdegreeCraneforMeansthetotaltimeinayear,Theactualnumberofhoursofcraneoperationandtheratiooftotalnumberofhours;Ofinstitutions,Referstoaninstitutionoperatinghourswithinayearandtheratiooftotalnumberofhours.Inaworkingcycleofthecrane,AgenciesoperatingtimepercentageofCalledtheagency'sdutycycle,ByJCsaid.

Degreeofloadchanges,

Designedbyacraneratedcapacityinactualoperation,

Theloadoftheliftingcraneisoftenlessthantheratedcapacity.

Thedegreeofthischangeinloadfromtheweightoftheutilizationfactorksaid.k=craneweightfromtheaverageoftheactualyear/crane'sratedcapacity.

Accordingcranesbusyloadinglevelanddegreeofchange,

Usuallythetypeofcranesare:Lightlevel,Intermediate,HeavyandExtraHeavyGrade4level.

Cranesandliftingthetypesofworkaretwodifferentconcepts,

Liftingcapacity,

Maynotbere-grade,

Fromtheweightofsmall,

Notnecessarilylightlevel.Suchashydropowercapacitybythecrane'sliftinghundredsoftons,

Buttheopportunityisrarelyused,

Onlyintheinstallationofunits,

Whenusingtherepaircrew,

Restofthetimestopthere,

So,althoughfromveryheavy,

Butstillislightlevel.

Anotherexampleistheuseofthestationyardgantrycranes,

Althoughnotfromtheweight,

Buttheworkisverybusy

Areheavydutytypeofwork.

Cranesafetyperformanceofthetypesofworkandhasaverycloserelationship.

Startingweight,

Span

Thesamecraneliftingheight,Iftheworkofdifferenttypes,Inthedesignmanufacture,SafetyfactorisnottakenbythesameThatis,partsandcomponentsmodel,Size,Specificationsvary.Suchaswirerope,brakeasaresultofdifferenttypes,Differentsafetyfactor(light-levelsecuritycoefficientissmall,Heavydutysafetyfactor),Theselectedmodelisnotthesame.Then,asisthe10tbridgecrane,Fortheintermediatetypeofwork(JC=25%)TheliftingmotorpowerN=16KW,Asfortheheavydutytypeofwork(JC=40%)LiftingmotorpowercomparedtoN=23.5KW.

Fromtheabovewecanseethat

Ifthelightlevelworkcranetypeusedinheavydutytypeofworkplace

Craneswilloftenfaulty,Ofsafeproduction.Therefore,securitychecks,Craneshouldpayattentiontothetypeofworkandworkingconditionsmustbeconsistent.

Cranecharacteristiccurve:thecarryingcapacityofthecranestructure,

Boomliftingcapacityandstabilityagainstoverturningthreewholeenvelopecurve.

Practicedoublegirderbridgecrane

2.33.1Workago

a.

Onthebrakes,

Hook,

Steelwireropeandsafetydevicesandothercomponentsrequiredbypointinspectioncardcheck

Abnormalphenomena

Shouldbeexcluded.

b.

TheoperatormustbesuretogowhennooneTaiwan,ortrack,

Canclosethemainpowersupply.

Whenthepowercircuitbreakerorasignonthelockwhen

Thepeopleconcernedshouldberemovedbeforetheoriginalclosingthemainpowersupply.

Cranesafetydeviceswhich

Inordertoensuresafeandreliableliftingoperation,CranewithabettersafetydevicesToaccidentalcircumstances,ProtectsthedeviceortoremindtheoperatorattentionToplayasecurityrole.

1.Hydraulicsystem,thereliefvalve:

Inhibittheabnormalhighpressureloop,

Topreventdamagetohydraulicpumpsandmotors,

Andtopreventoverloadinthestate.

2.Luffingcranesafetydevices:

Whentheunexpectedincidentoccurs,

Boomluffingcylinderhigh-pressurehoseorlooporcutoffwhenthepipeburst,

Balancingvalveinthehydrauliccircuittowork,

Lockchamberfromthefueltankoftheworkundertheoil

Theboomw