水平螺旋輸送機(jī)的設(shè)計(jì)【12m】

水平螺旋輸送機(jī)的設(shè)計(jì)【12m】,12m,水平螺旋輸送機(jī)的設(shè)計(jì)【12m】,水平,螺旋,輸送,設(shè)計(jì),12,十二 JournalofMaterialsProcesingtecholgy7(198)153-156MO DULARO O O SCREWCO NVEYO RO OO OO O Abstractscrewconveyorcom psedofapluralityofm dulesm atedendtoendandofidenticalintegralym oldeconstruction.Eachm oduleism oldeofasuitableplasticm aterialandhasintegralyform edtherwithacylindricalbody,acoaxilydisposedtubewithinthebody,andawebhelicalydisposedbetwenthecoaxiltubeandthecylindricalbody.Them oduleincludesndsm atebleithcorespondigendsoflikem odulestoprovideascrewconveyorfintedelengthandwhicisrotableassingleunitarystructre.Eachm odule m ayhaveasheaveintegralym oldetheronform atingwithaV-beltdrive.Alternatively,them odulescanbeofpenform eachavingahelicalwebm oldeonacentraltubeprefrablyhavingano-cirularndaptedforendtoendm atingwithlikem odulestoprovideascrewconveyorfdesiredlength.Thisopentypeofscrewconveyorcanberadilyretrofitedtosytem shavingconventionalm etalconveyorscrews. BACK G RO UNDK G OK G OK G O O FO O O TH EH H H INVENTIO O O O Screwconveyorsarewelknownforthetransportof M.Alaudinetal./JournalofMaterialsProcesingTechnolgy7(198)153-15615bulkm aterial.Suchconveyorsgenralyincludeahelicalscrewdisposedwithinhousing,oftenoftroughlikeform ,androtableaboutitslongitudinalaxistocauseproulsionofbulkm aterialalongthe lengthofthescrew.Conveyorsofknownconstructionareusalyfabricatedofm etalandareconstructedtoanitendefinishedsizetoprovideaconveyorfintedelength.Screwconveyorshavealsobenconstructedofm dularorsegm ntedformtoprovidesectionswhiccanbeasem bldintoa com pletconveyorfadesiredlength.Exam plesofsegm ntedorm dularconveyorsareshowniU.S.Pat.Nos.349,23;52,194;1,867,53;2,394,163;2,492,15and3,178,210.SUMARYO FO O O TH EH H H INVENTIO O O O conveyorcom psedofidenticalendtoendm atedm odules,eachm odulebeingofintegralplasticm oldeconstruction.Eachm oduleinThepresntinventionprovidesascrewcludesabodyofcylindricalconfiguration,atubecoaxilydisposedwithinthecylindricalbodyandhavinganopenig extndigtherthrough,withawebhelicalydisposedbetwenthecoaxiltubeandcylindricalbody.Thendsofthebodyandcoaxiltubeareconfiguredtosem inglyengaelikendsofm atedm odules,andtherspectivendsoftheelicalwebincludesurfacesm ateblewithcorespondig surfacesofthem odules.Them odulesareaxilym atedtofrm aconveyorofdesiredlength,them atedm odulesbeingretainedinegaem ntbyatensilem m bersuchasrodisposedthroughtealignedopenigsofthecoaxiltubesandoperativetoprovideanitendecom presiveforceonthe engaedm odules. Alternatively,them odulescanbesecuredinengaem ntbyotherm eanssuchasflangesonthendsofthebody.Them odulebody,coaxiltube,andhelicalwebareintegralym oldeofasuitableplasticm aterial,typicalybyaninjectionm oldingproces.Each m odulem ayincludeasheaveintegralyform edwiththebodywhiciscom psedofapluralityofspacedsegm ntstodefineaV-groveconfiguredtom atewithaV-beltofanextriordrive.Alternatively, sprockettethm aybeintegralyform edwithtem odulebodytom atewithachaindrive,ortherdrivngm eanscanbem ployed.Inthem bodim ent describedabove,theelicalwebisintegralyform edwithinasuroundigtubehicprovidesaself-enclosurefortheelicalscrew.The conveyorofthepresntinventioncanalsobeem bodieinopenform inwhicthem odulecom priseacentraltubeprefrablyhavingano-cirularopenig,aboutwhictheelicalwebisintegralym olde.Thendsofthecentraltubeandendsofthewebarem ateblewithtendsofthe m odulestoprovideaconveyorfdesiredlength. Them odulesareretainedincom presiveengaem ntbyatensilem m bersuchasshaftofno-cirularcros-sectionextndigthroughtealignedno-cirularopenigsofthecentraltubes,therodalsoservingastensionaldriveshaftorthem atedm odules.Thisopentypeofscrewconveyor drivenbyacentralshaftisadptedtobereadilyretrofitedtoexistingconveyorsytem swhicpresntlyem ployconventionalm etalconveyorscrews.Them oldeplasticonveyorfthisinventionfersm ajorbenfitsoverscrewconveyorsofconventional construction.Theasem bldm odulesofersm othefctivelycontiuossurfacesthroughoutthelengthoftheconveyorwithnohardwareortherobstructionsalongtheconveyingsurfaces.Thenovelconveyoriseasilycleanedandcanbem oldeofavarietyofm aterialscom patiblewithand suitableforparticularoperationalpurose.The M.Alaudinetal./JournalofMaterialsProcesingTechnolgy7(198)153-156156conveyorisnotsubjectorustorcorsion,aswithm anyconveyors,andisofm uchlesweighthanam etalconveyorofthesam esize.Them odularconstructionalowsasingleunitarym oduletobe m anufacturedandstockedforasem blyasnecsarytoachievconveyorsofdiferntlengths.Them odulescanbeasilyshipedtoanistaltionsiteandasem bldonsiteforuse.Theconveyorcanlsoberadilydisasem bledintoitscom pnetm odulessuchasforcleanig,shiping,orepair. DESCRIPTIO NO O O O FO O O TH EH H H DRAWING SG G GTheinventionwilbem orefulyunderstodfromthefolwingdetaileddescriptiontakeninconjuctioniththeacom panyigdrawings,inwhic:FIG.1isapictorialviewofascrew conveyorm duleem bodyingtheinvention;FIG.2isanedviewofthem oduleofFIG.1;FI.3isasectionalvietakenalonglines33ofIG.2;FIG.4isapictorialviewofanem bodim entsim lartothatofFIG.1andincludinganitegralym oldesheavetheron;FIG.5isanedviewofthem oduleofFIG. 4;FIG.6isasectionalvietakenalonglines66ofI.5;FIG.7isasectionalsideviewofascrewconveyorem bodyingtheinventionadcom psedofthem odulesofFIGS.1-3;FIG.8isacutawysideviewofam odulehavingalternativem ountigm eans;FIG.9isasectionalelvationviewofa furtherm bodim ent ofascrewconveyorm duleoftheinvention;FIG.10isanedviewofthem oduleofFIG.9;I.1isasidevieofascrewconveyorem bodyingtheinventionadcom psedofthem odulesofFIGS.9and10;andFIG.12isapictorialviewofafurtherm bodim ent ofascrew conveyorm duleoftheinvention.DETAILEDESCRIPTIO NO O O O FO O O TH EH H HINVNIO O O O RefringtoFIGS.1-3ofthedrawing,therisshownaintegralym oldem odulehicism atedithlikem odulestoform ascrewconveyorofintedelength.Them oduleism oldeofasuitableplasticm aterialsuchaspolyethylen,polyproylenorpolyurethaneandhasintegralyform edtherwith alesntialconstiuentsofthescrewconveyor.Them oduleincludesabodyoftublarconfigurationhavingonthendstherofcirulargroves12and16,respectively,foracom m dationofanO-ringsealbetwenm atedm odules.Atube16iscoaxilydisposedithinbody10andhavinganopenig18 extndigtherthrough,withaweb20helicalydisposedbetwentheinersurfaceofbody10andoutersurfaceoftube16.Thetube16includesontherespectivendstherofcirulargroves517foracom m dationofanO-ringseal.Theweb20isslightlylesthanoehlicalpitchlengthterm inating inrespectivends2and24whicincluderadicalyparlelsurfaces26adptedtoconfrontcorespondigsurfacesoflikem odules.Thus,thesurface26ofhelixend102isadptedtocnfronttheopositelyfacingedgeofend24ofanadjcentm odule.Thewebendsextndoutwardofthe confrontigendsofbody10typicalybyaproxim ately1/2thewalthicknesoftheweb,asilustrated.Byhavingthelngthoftheelicaleb15slightlylesthantheelicalpitchitisposibletoinjectionm ldthem odulebyconventionalm oldingtechniquesinceasenfrom FIG.2thetwohalves M.Alaudinetal./JournalofMaterialsProcesingTechnolgy7(198)153-15615ofanijectionm ldcanopenaxilyofthem odulewhic,becauseitshelicalengthislightlylesthanonehelicalpitch,presntsnoundercutstothem oldhalves.Typicaly,theweblengthisaboutone percntlesthanthepitchlengthtoprovidesuficentclearnceform ldtoling.Anem bodim ent sim lartothatofFIGS.1-3isshowniFIGS.4-6andincludesasheaveintegralym oldewithteconveyorm dule.Thesheaveisprovidearoundthebodycentralydisposed betwentherspectivendsofthebody,thesheavebeingcom psedofalternatingsegm nts.Afirstaryofsegm ntsisdisposedaroundthebodyinspacedcirum ferntialarngem nt. Asecondaryofsegm ntsisaxilyspacedfrom thesegm ntsandiscirum ferntialydisposedabout bodyinspacedpositonstagerdfrom thepositonofthesegm nts,asilustrated.Theconfrontigsurfacesandofrespectivesegm ntsandefineaV-grove,bestseniFIG.6,configuredtom atewithaV-beltofanextriordrive.Them oduleisotherwisethesam easdescribedabovewithrespect toFIGS.1-3.Thestagerdarngem ntofthesegm ntsandalowinjectionm oldingbyconventionalinjectionm ldingtechniquesincethestagerdarngem ntassenfrom FIGS.4-5perm itsthem oldhalvestopenaxilyofthem oduleandpresntsnoundercutstothem old halves.Them oduleofFIGS.1-3isaxilym atedwithlikem odules,ashowninFIG.7,toform aconveyorfdesiredlength.Eachofthem odulesisalignedwiththeendsofadjcentbodiesinengaem ntithaniterposedO-ring,andwithte endsofadjcenttubesinengaem nt ithaninterposedO-ring.Theelicalwebshavetheiredgesconfrontigtoprovideanefctivelycontiuoshelicalscrewdisposedwithinthecontiuostublarbodyform edbythem atedm odules.Sincethewebisslightlylesthanonehelicalpitchlength,sm al spacesexistbetwentheconfrontigwebendsofm atedm odules. Typicaly,thegapbetwenconfrontigwebendsiabout0.1inchforaebofeightinchdiam etr.Thesm alspacesbetwenthe confrontigendsofthehelicalwebareoflitleconsequencetotheabiltyoftheasem bldscrewtoconveym ostproducts.Thesm alspacesm aybefiledinwithm aterialwhicisthesam easorcom patibleithtatofthem odule.Forexam ple,m oldestripsofplastic m aterialcanbeinsertdintothesm alspacesbetwenwebendsandfusedtherin,suchasbyhotgaselding,toproduceahelicalwebhavingfulycontiuosurfaces.Thelim nationofthesm algapsisusefulinsom eaplicationsuchaswhersanitaryconditonsrequire.Form ostconveying purose,thesm al spacesarenotofanyconsequence.Them atedm odulesarem aintainedinengaem ntbyatensilem m berdisposedwithintheopenigsoftubes.Thism em brtypicalyisam etalrod41havingthreadeends42andfastenrs4 whicaretightendtoprovideanintedecom presiveforceontheengaedm odules.Alternatively,thetensilem m bercanbeawire,plastic,ortheropedisposedwithintheopenigs18oftubes16andtensionedbyapropriatefastenrsontherspectivendsoftherope.Incase whertheconveyorissubjecttochangesintem prature,itwouldbeprefrabletohaveatensilem em brwhicalosforexpansionadcontractionoftheconveyorwhilem aintainigtheaxilcom presiveforceonthem atedm odules.Thetnsilem em brshouldbeofam terialhavingtherm al expansionadcontractioncharcteristicsinrelationtothoseofthem odulestom aintainacom presiveloadonthem atedm odulesevnduringtem praturecyling.Them odulescanalternativelybesecuredtogethrbym eansotherthanatensilem m ber. Onesuch alternativeisilustratedinFIG.8inwhicthebody10includesoneachendtherofanitegralflange45havingopenigs47disposedaboutthecirum fernceoftheflangeandthroughwhicfastenrsareinsertableforsecuringm atedendstogethr. Them atedm odulesm aybesuportedforrotaiononrolers46.Typicaly,anaryofthre M.Alaudinetal./JournalofMaterialsProcesingTechnolgy7(198)153-156156cirum ferntialyspacedrolersisprovideneareachendoftheconveyorbody.Aditonalrolerscanbeprovideasnecsary,depndiguponthelengthoftheparticularconveyor.Axialpositonig oftheconveyorbodyism aintainedbyhorizontalydisposedrolers48ateachendofthebody,thesrolersbeingcirum ferntialyspacedabouttheperipheryofthebody.Aflange50isatchedtotheendm oulesoftheconveyorandincludesacirularsurface52whiciscoperativewithterolers48to m aintaintheaxilpositonoftherotablebody.Aslipsealcanbem achinedortherwiseform edintheouterndoftheouterm ostm odule.Intheilustratedem bodim ent, theslipsealisintheform ofananulargrove54intowhicanedofafedtube56isinsertd,andithrespecttowhicthe conveyorbodyisrotable.Thefedtube56istypicalyconectdtoahoper58intowhicaproductisfed(asshownbythearo)forconveyance.Thedriveasem bly60includesheaves62cariedbyandrotablewithashaft64whicis suportedonbearingblocks6andwhicisdrivenbyam otr(notshown).Theshaft64ispacedfromandparleltotheconveyorbody,andeachseave62m aybeinasociationwitharespectiveconveyorm odule.V-belts68couplethedrivesheaves62totheconveyorm odulesandbywhicpoweris transm itedtotheconveyorbodyforotaiontherof.Intheilustratedm bodim ent, eachofthem odulesisdrivenbyanasociatedconveyorbeltcoupledtothedriveasem bly.Aloftheconveyorm dulesnednotbedriven,andthedrivenum berwilbedetrm inedinacordancewiththem otiveforce necsarytorotaetheconveyorforparticularaplications.Ifthem odulesofFIGS.4-6arem ployed,thesheaves28areoperativetoengaetheV-belts68fordrivngtheconveyor.ItisapreciatedthattheconveyorcanbedrivenbyotherthanV-belts.For exam ple,chainsprocketscanbeform edonr atchedtothem odulesforcoperationwithachaindrive.Anotherm bodim ent oftheinventionishowninFIGS.9and10andincludesascrewconveyorm odulehavingacentraltube70ofcylindricalextriorform ,5withano-cirularopenigther throughandithaeb72helicalydisposedaboutthecentraltube.Theelicalwebislightlylesinlengthtanonehelicalpitchlength,asdescribed,andterm inatesatedges74and76,thesedgesbeingadptedtocnfrontcorespondigedgesofadjcentm odules.Theopenig78throughtecntraltubeis ofno-cirularcros-sectionatendportions80andtaperstoano-cirularcros-sectionatacentralportion82.Thistaperingislightandisprovideasdraftangletofaciltaerm ovalofthe15m odulefrom axilyseparblem olds.Theopenigisconfiguredtom atewithano-cirularshaftwhic servesastensilem m bertolckthem odulesintoaxilengaem ntandwhicalsoservesaspositvedriveshaftforrotaionoftheconveyor.Intheem bodim ent ofFIGS.9and10,theopenigisilustratedashexagonal,althoughothernocirularshapedopenigscanbeprovideintubeforuse withacorespondiglyshapedshafttoprevntrotaionfthengaedm oulesrelativetotheshaft.Ascrewconveyorcom psedofthem odulesofFIGS.9and10ishowniFIG.1.Eachofthem odulesisalignedithtendsofadjcentcentraltubes70inengaem ntwithaniterposedO-ring 84,andwithtehelicalebs72havingtheirendsconfrontigto35provideanefctivelycontiuoshelicalscrew.Ashaft86isfitedthroughtheopenigs80throughtetubes70andisecuredbyendfastenrs,uchasnuts8threadeontthreadeendsofshaft86,whicaretightendtoprovidean intedecom presiveforceontheinterconectdm odules,asdescribedabove.Thisem bodim ent ofFIG.1canbem ployedtoretrofitexistingm etalscrewconveyorswithoutm aterialchangetothedrivesytem .