Selection and role of roller conveyor

Therollerconveyorismainlyacompleteconveyorlineformedbythearrangementoftherollers.Itcannotonlytransportmaterialsalone,butalsocombineitwithotherconveyorequipmenttoformacomplexconveyorsystem.Themaincomponentoftheconveyingequipmentisthetransmissionroller,whichreliesonthefrictionbetweentheconveyorandthebelttodrivethebelttorun.Thedrivingrollerintherollerconveyorcanbedividedintolight,mediumandheavyaccordingtoitsbearingcapacity,andthediameterofthesamerollerhasseveraldifferentshaftdiametersandcenterspansforselection.1.Light-dutyroller:Thebearingboreisusually80-100mm,andtheshaftandhubaregenerallysingle-plateweldedcylinderstructureswithasinglekeyconnection.2.Medium-sizeddrum:Thebearingboreisgenerally120-180mm,andtheshaftandhubaremostlyconnectedbyexpansionsleeves.3.Heavy-dutyrollers:Thebearingboresaremostly200-220mm,theshaftsandhubsaremostlyconnectedbyexpansionsleeves,andthecylinderisacast-weldedstructure.Therearetwotypesofshafts:unidirectionalandbidirectional.Inordertoincreasethecoefficientoffriction,arubberbottomsurfacewithaherringbonegrooveisusuallyaddedtothesurfaceofthesteelsmoothroller.Thisrollerhasdirectivityandcannotbereversed.Therollerconveyorusesaherringbonegroovedrubber-coveredroller.Evenwhenworkinginwetplaces,thereductionofthefrictionserieswillbesmall,becausethegroovecaninterruptthefilmofwaterwithoutwateraccumulation.Whentheconveyorbeltcontactstheroller,theconveyorThebeltsurfacecanbepressedintothegroove.Inmanyfactories,theproductionenvironmentishumidandthepowerconsumptionislarge.Usually,herringbonegroovedrubber-coatedrollersareused.Thedrivingrollerintherollerconveyorisdividedasasingle-pointdrivingmethod,andcanbedividedintoasinglerollerdrivingandadoublerollerdriving.Single-rollerdrivesaremostlyusedonlesspowerfulconveyors.Double-rollertransmissionismostlyusedonhigh-powerconveyors,becauseitisnotonlycompact,butalsocanincreasetheenclosingangletoincreasethetractionthattherollerconveyorcantransmit.Inaddition,theuseofdoubledrumtransmissioncannotonlyusemultiplemotorsforseparatetransmission,butalsousegeartransmissiontomakethetwodrumsrunatthesamespeed.Thetransmissionrollerstructureoftherollerconveyorincludessteelplateweldingstructure,caststeelandcastironstructure.Wecanchoosetherollerstructurethatsuitsyouaccordingtotheactualneedsandproductionenvironment.

How to increase the useful life of conveyor belts

MechatronicsOnlineNews]Inrecentyears,asEuropeanandAmericancountries’demandforcoalplummeted,thisyear’ssouthernChinahasplentyofrain,andmajorhydropowerstationsareoperatingatfullcapacity.Ithasbecomethereasonforthedeclineincoalpricesthisyear.Atthesametime,thedeclineincoalpriceshasgreatlyaffectedtheenthusiasmofupstream-relatedcompaniestoputintoproduction,anditisparticularlyimportanttoimprovetherecyclingofresourceswithintheenterprise.Let’snottalkabouttheconveyorbelt.Ibelievethatitisabigexpenseforeverycoalminingenterprise.WhenItalkaboutithere,Iwanttobrieflytalkaboutsomeissuesaboutimprovingtheconveyorbelt,andsomeaboutimprovingtheconveyorbelt.Questionofage.哪些Whichmethodsdoyouuse?Theauthorhassummarizedafewpoints,andeveryonemaywishtolearnfromthem.1.Improvetheconveyordrophopper.Improvingthefallinghopperoftheconveyorbeltisoneoftheeffectivemeasurestopreventtheearlydestructionoftheconveyorbelt.Improvethedroppinghopperatthetransferplaceofeachbeltconveyor,sothatitsabilitytopassforeignobjectsisincreasedby2.5times.Longandlargeforeignobjectsarenoteasilycaughtbetweenthefunnelwallandtheconveyorbeltduringtransportation,reducingtheriskofforeignmaterialstearingtheconveyorbelt.Probability.Thematerialguideskirtatthefallinghoppermakesthegapbetweentheconveyorbeltandtheconveyorbeltlargerandlargeralongtherunningdirectionoftheconveyorbelt,solvestheproblemofcoalandstonestuckbetweentheconveyorbeltandtheskirtboard,andeliminatestheconveyorbeltcausedbyit.damage.Thehopperwithalargedrophasaninternalbufferbaffletopreventthematerialfromdirectlyimpactingtheconveyorbelt.2.Addthescrapingdeviceatthedivertingroller.Ascrapingdeviceisinstalledattheredirectingrolleralongtheconveyorbelttoeliminatetheproblemofmaterialadhesionattheredirectingrollerandtosolvethelocaldamageoftheconveyorbeltcausedbythestickymaterialoftheroller.3.Improvementsonthetransitionsoftheconveyorhead,tailandintermediatetransfer.Thetransitionlengthandtransitionmodeoftheconveyorhead,tailandintermediatetransferplacehaveagreatimpactontheservicelifeoftheconveyorbelt.Reasonabletransitiondesignshallbecarriedout,andthewearoftherubbersurfaceoftheconveyorbeltshallbereducedasmuchaspossibletoensurethatthefoldingoftheconveyorbeltandtheprotrusioninthemiddledonotoccur,andnomaterialleakageoccursattheblankingplace.4.Conveyorrollerattheconcavetransition.Practicehasprovedthatthetransversestrengthofthesteelropeconveyorbeltisinsufficient.Whenstartingup,thepressurerollercausesthelocalbelttobeoverstressed,causingthebelttotear.Changingthepressurerollertoapressurerollercancompletelysolvethisproblem..5.Reducetheloadofthelargearmconveyorbelt.Theinitialservicelifeoftheboomconveyorbeltofthestackerofthecoalminesystemisveryshort.Theoverweightdesignisanimportantreasonfortheexcessivetensionoftheconveyorbeltandtheprematurecrackingandaging.Onthebasisofmeetingthetensionofthematerialscarriedbytheconveyorbelt,afterreducingthecounterweight,theservicelifeoftransportingcoalhasbeenextendedfrom1.5milliontonsto4.5milliontons.Theoriginaldesigncounterweightofthe200,000tminingsystemstackerandreclaimerconveyorbeltwas25t(includingtheweightofthecounterweightroller).Afterthesecondaryloadreductionand6tweightreduction,thedomesticordinarysteelwirebeltisused,andtheoperationvolumeexceeds8milliontons.6.Materialflowdirectionadjustment.Thematerialflowdirectionhasanimportantinfluenceontheservicelifeoftheconveyorbelt.Thematerialflowshouldruninthesamedirectionastheconveyorbelt,whichcangreatlyincreasetheservicelifeoftheequipment.7.Conveyorbeltlocaldamagerepairtechnologyprolongstheservicelife.(1)Localthermalvulcanization;thatis,thethermalfluidizationofconveyorbelts,whichisoftensaid,requiresvulcanizingmachines.(2)Partialcoldsplash,theproductsincludeGermandeeptechnologyliquidpolymercompositerepairmaterials,etc.,butneedtobecuredatroomtemperatureforabout10h;(3)Localcoldadhesion,usingGermandeeptechnologyrepairpatch(longitudinalcrack),coldViscose-T2compoundgluefillscracksinthelongitudinaldirection(requiresspecialgluegun).Thesetwomethodshavetheadvantagesoflessinvestmentinhumanandmaterialresources,betterwearresistanceandreinforcementperformance,shorterrecoverytime,andthedisadvantageisthattheyrequirehighenvironmentalrequirementsandcannotberestoredtotheoriginalsurfacerequirementsoftheconveyorbelt;(4)Conveyorbeltsprayrepairtechnology.Thistechnologymixesseveralliquidmaterialsthroughspecialequipment,spraysthemonthewearsurfaceofthebeltunderhighpressure,andspraysacertainthicknessofabrasion-resistantlayerasrequired.Shortcuringtime,suitableforlocalabrasionofcontinuouspieces,theeffectisverygood,thedisadvantageisthatspecialequipmentisneeded.8.Reasonablechoiceofbelttypeandmaintenance.Reasonablyselectthetype,adjustthecorrectiondevicealongthelineintimeaccordingtoseasonalchanges,addsunshieldsandwintermaintenancemeasurestoextendthelifeoftheconveyorbelt.9.Othermanagementissues.Strengthenthemanagementofidlerrollersandcleaners,andtimelyreplacethedamage.Controlstartwithload.

Analysis on prevention and treatment of conveyor belt deviation

Thedeviationoftheconveyorbeltisacommonproblemencounteredduringtheuseoftheconveyor,anditisalsoaheadacheforcustomers.Howtopreventandeliminatethemisalignmentoftheconveyorbelt?Itisnecessarytocheckthecausesfirst,andthen"medicaltreatment".I.Preventivemeasuresforconveyorbeltdeviation(1)Improveinstallationquality(2)Improveconveyorbeltjointquality;(3)Strengthenpatrolinspectionandmaintenance(4)Ensureunbiasedloading;(5)Ensurethatthecleaningdeviceisnormal.Second,on-siteprocessingmethodofconveyorbeltdeviation(1)Automaticdragrollerdeviationadjustment:Whenthedeviationrangeoftheconveyorbeltisnotlarge,theself-aligningdragrollercanbeinstalledatthedeviationoftheconveyorbelt.(2)Appropriatetighteninganddeviationadjustment:Whentheconveyorbeltrunssideways,theirregulardirectionindicatesthattheconveyorbeltistooloose,andthetensioningdevicecanbeproperlyadjustedtoeliminatethedeviation.(3)Single-sidedverticalrollerdeviationadjustment:Theconveyorbeltalwaysdeviatestooneside.Severalverticalrollerscanbeinstalledwithintherangetoresetthetape.(4)Adjustingthedeviationoftherollers:theconveyorbeltisrunningawayfromtherollers,checkingwhethertherollersareabnormalormoving,adjustingtherollerstothehorizontalpositiontorotatenormallytoeliminatedeviations,(5)correctingthedeviationoftheconveyorbeltjoints;Alwaysonedirection,andthemaximumdeviationisatthejoint.Theconveyorbeltjointcanbecorrectedperpendiculartothecenterlineoftheconveyortoeliminatedeviation.(6)Paddlerolleradjustment:Thedeviationanddirectionoftheconveyorbeltareconstant.Severalsetsofsiderollersareusedtoeliminatethedeviation.(7)Adjustingthedeviationofthetrailingrollers:Thedeviationdirectionoftheconveyorbeltisconstant.Checkthatthecenterlineofthetrailingrollersisnotperpendiculartothecenterlineoftheconveyorbelt.Youcanadjustthetrailingrollerstoeliminatethedeviation.(8)Eliminationofattachmentdeviation:Thedeviationpointoftheconveyorbeltremainsunchanged.Ifattachmentsarefoundonthetowrollersandrollers,thedeviationshouldbeeliminatedafterremoval.(9)Correctthedeviationofthefeeding:Thetapeisnotbiasedatlightloadandthedeviationofheavyload.Thefeedingweightandpositioncanbeadjustedtoeliminatethedeviation.(10)Correctingthedeviationofthebracket:Thedeviationdirectionandpositionoftheconveyorbeltarefixed,andthedeviationofthebracketcanbeadjustedtopreventthedeviation.

Drive and brake system for large belt conveyor

Forthefailureofthehydraulicsystemoftheconstructionmachineryonsite,accordingtotheworkingprincipleofthehydraulicsystem,thecauseofthefailurecanbereasonedonthesystemdiagramaccordingtothesequenceofthepowerelement-controlelementexecutionelement.Accordingtotheanalysis,itisgenerallycausedbythedecreaseinoilpressureorthedecreaseinflow.Fromthesystemdiagram,thepossiblefactorsthatcausethepressuredropare:①fueltank,suchaslackofoil,blockedsuctionfilter,andventholesarenotsmooth;②hydraulicpumpleakForexample,thefittingclearanceoftheplungerpairofthehydraulicpumpisincreased;③Thepressureofthemainsafetyvalveonthecontrolvalveistoolow,theconfigurationof30isanalyzed,andrelatedproblemsareexplained. Forbeltconveyorsthataremainlyusedforleveltransportationanduppertransportation,themainproblemistosolvethedrivingproblem,whileforbeltconveyorsthataremainlyusedforthefollowingtransportation,theproblemismainlytosolvethebrakingproblem.Becausetheloadisdraggingthemotorwhenitisrunningunderload,themotorisinthestateofgeneratingandbraking.Oncethemotorlosespowerandisnotequippedwithasuitablebrakingsystem,thespeedofthelowerbeltwillbefasterandfaster,whichwillcauseflying.accident.Thedrivesystemandbrakesystemofthelargebeltconveyorarediscussedbelow. 1DrivesystemforlargebeltconveyorsForflatorupperbeltconveyors,thedrivesystemisgenerallycomposedofmotor,hydrauliccouplingandreducer.Duetoseveremoment-limitingfluidorinternalleakage;④Thesettingpressureoftheboomhydrauliccylinderoverloadvalveistoolowortheinternalleakageisserious,and⑤theoilreturnpathisnotsmoothandsoon.Consideringthesereasons,somefactorsareeliminatedaccordingtotheexistinginspectionresults,andthescopeofthefaultisnarroweduntilthefaultpointisfoundandeliminated. Inthefaultdiagnosisofthehydraulicsystemofconstructionmachineryduringfieldconstruction,accordingtotheworkingprincipleofthehydraulicsystem,itisnecessarytomastersomelawsandcommonsense,andtoanalyzewhetherthefailureisearlyorgradual.Ifitisearly-onset,itismostlyduetoimproperadjustment.Ifitisprogressive,itisoftencausedbycomponentwear,corrosion,fatigue,andaging.Second,itisnecessarytoanalyzewhetheritisawearingpartoranon-wearingpart.IfitisunderhighfrequencyandheavyloadThemovingpartsarehydrauliccomponentsthatarepronetofailure,suchastheplungerpair,oildistributionplatepair,variableservo,andhydrauliccylinderofthehydraulicpump,whilethecomponentsatlowfrequency,lightload,orrelativelystationaryarelesspronetofailure.Suchasdirectionalvalve,sequencevalve,slidevalve,etc.Aftermasteringtheserules,itcanplayapositiveroleinquicklydeterminingthefaultlocation.