机械制造及自动化专业外文翻译螺旋输送机Word下载.docx

机械制造及自动化专业外文翻译螺旋输送机Word下载.docx

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Ascrewconveyorcomposedofapluralityofmodulesmatedendtoendandofidenticalintegrallymoldedconstruction.Eachmoduleismoldedofasuitableplasticmaterialandhasintegrallyformedtherewithacylindricalbody,acoaxiallydisposedtubewithinthebody,andawebhelicallydisposedbetweenthecoaxialtubeandthecylindricalbody.Themoduleincludesendsmateablewithcorrespondingendsoflikemodulestoprovideascrewconveyorofintendedlengthandwhichisrotatableasasingleunitarystructure.EachmodulemayhaveasheaveintegrallymoldedthereonformatingwithaV-beltdrive.Alternatively,themodulescanbeofopenformeachhavingahelicalwebmoldedonacentraltubepreferablyhavinganon-circularandadaptedforendtoendmatingwithlikemodulestoprovideascrewconveyorofdesiredlength.Thisopentypeofscrewconveyorcanbereadilyretrofittedtosystemshavingconventionalmetalconveyorscrews.

MODULARSCREWCONVEYOR

.FIELDOFTHEINVENTION

Thisinventionrelatestoscrewconveyors,andmore10particularlytoanintegrallyconstructedmodularscrewconveyormoldedofaplasticmaterial.

BACKGROUNDOFTHEINVENTION

Screwconveyorsarewellknownforthetransportofbulkmaterial.Suchconveyorsgenerallyincludeahelicalscrewdisposedwithinhousing,oftenoftroughlikeform,androtatableaboutitslongitudinalaxistocausepropulsionofbulkmaterialalongthelengthofthescrew.Conveyorsofknownconstructionareusuallyfabricatedofmetalandareconstructedtoanintendedfinishedsizetoprovideaconveyorofintendedlength.Screwconveyorshavealsobeenconstructedofmodularorsegmentedformtoprovidesectionswhichcanbeassembledintoacompleteconveyorofadesiredlength.ExamplesofsegmentedormodularconveyorsareshowninU.S.Pat.Nos.349,233;

525,194;

1,867,573;

2,394,163;

2,492,915and3,178,210.

SUMMARYOFTHEINVENTION

Thepresentinventionprovidesascrewconveyorcomposedofidenticalendtoendmatedmodules,eachmodulebeingofintegralplasticmoldedconstruction.Eachmoduleincludesabodyofcylindricalconfiguration,atubecoaxiallydisposedwithinthecylindricalbodyandhavinganopeningextendingtherethrough,withawebhelicallydisposedbetweenthecoaxialtubeandcylindricalbody.Theendsofthebodyandcoaxialtubeareconfiguredtoseeminglyengagelikeendsofmatedmodules,andtherespectiveendsofthehelicalwebincludesurfacesmateablewithcorrespondingsurfacesofthemodules.Themodulesareaxiallymatedtoformaconveyorofdesiredlength,thematedmodulesbeingretainedinengagementbyatensilemembersuchasaroddisposedthroughthealignedopeningsofthecoaxialtubesandoperativetoprovideanintendedcompressiveforceontheengagedmodules.Alternatively,themodulescanbesecuredinengagementbyothermeanssuchasflangesontheendsofthebody.Themodulebody,coaxialtube,andhelicalwebareintegrallymoldedofasuitableplasticmaterial,typicallybyaninjectionmoldingprocess.EachmodulemayincludeasheaveintegrallyformedwiththebodywhichiscomposedofapluralityofspacedsegmentstodefineaV-grooveconfiguredtomatewithaV-beltofanexteriordrive.Alternatively,sprocketteethmaybeintegrallyformedwiththemodulebodytomatewithachaindrive,orotherdrivingmeanscanbeemployed.

Intheembodimentdescribedabove,thehelicalwebisintegrallyformedwithinasurroundingtubewhichprovidesaself-enclosureforthehelicalscrew.Theconveyorofthepresentinventioncanalsobeembodiedinopenforminwhichthemodulecomprisesacentraltubepreferablyhavinganon-circularopening,aboutwhichthehelicalwebisintegrallymolded.Theendsofthecentraltubeandendsofthewebaremateablewiththeendsofthemodulestoprovideaconveyorofdesiredlength.

Themodulesareretainedincompressiveengagementbyatensilemembersuchasashaftofnon-circularcross-sectionextendingthroughthealignednon-circularopeningsofthecentraltubes,therodalsoservingasatensionaldriveshaftforthematedmodules.Thisopentypeofscrewconveyordrivenbyacentralshaftisadaptedtobereadilyretrofittedtoexistingconveyorsystemswhichpresentlyemployconventionalmetalconveyorscrews.

Themoldedplasticconveyorofthisinventionoffersmajorbenefitsoverscrewconveyorsofconventionalconstruction.Theassembledmodulesoffersmootheffectivelycontinuoussurfacesthroughoutthelengthoftheconveyorwithnohardwareorotherobstructionsalongtheconveyingsurfaces.Thenovelconveyoriseasilycleanedandcanbemoldedofavarietyofmaterialscompatiblewithandsuitableforparticularoperationalpurposes.Theconveyorisnotsubjecttorustorcorrosion,aswithmanyconveyors,andisofmuchlessweightthanametalconveyorofthesamesize.Themodularconstructionallowsasingleunitarymoduletobemanufacturedandstockedforassemblyasnecessarytoachieveconveyorsofdifferentlengths.Themodulescanbeeasilyshippedtoaninstallationsiteandassembledonsiteforuse.Theconveyorcanalsobereadilydisassembledintoitscomponentmodulessuchasforcleaning,shipping,orrepair.

DESCRIPTIONOFTHEDRAWINGS

Theinventionwillbemorefullyunderstoodfromthefollowingdetaileddescriptiontakeninconjunctionwiththeaccompanyingdrawings,inwhich:

FIG.1isapictorialviewofascrewconveyormoduleembodyingtheinvention;

FIG.2isanendviewofthemoduleofFIG.1;

FIG.3isasectionalviewtakenalonglines3—3ofFIG.2;

FIG.4isapictorialviewofanembodimentsimilartothatofFIG.1andincludinganintegrallymoldedsheavethereon;

FIG.5isanendviewofthemoduleofFIG.4;

FIG.6isasectionalviewtakenalonglines6—6ofFIG.5;

FIG.7isasectionalsideviewofascrewconveyorembodyingtheinventionandcomposedofthemodulesofFIGS.1-3;

FIG.8isacutawaysideviewofamodulehavingalternativemountingmeans;

FIG.9isasectionalelevationviewofafurtherembodimentofascrewconveyormoduleoftheinvention;

FIG.10isanendviewofthemoduleofFIG.9;

FIG.11isasideviewofascrewconveyorembodyingtheinventionandcomposedofthemodulesofFIGS.9and10;

andFIG.12isapictorialviewofafurtherembodimentofascrewconveyormoduleoftheinvention.

DETAILEDDESCRIPTIONOFTHE

INVENTION

ReferringtoFIGS.1-3ofthedrawing,thereisshownanintegrallymoldedmodulewhichismatedwithlikemodulestoformascrewconveyorofintendedlength.Themoduleismoldedofasuitableplasticmaterialsuchaspolyethylene,polypropyleneorpolyurethaneandhasintegrallyformedtherewithallessentialconstituentsofthescrewconveyor.Themoduleincludesabodyoftubularconfigurationhavingontheendsthereofcirculargrooves12and16,respectively,foraccommodationofanO-ringsealbetweenmatedmodules.Atube16iscoaxiallydisposedwithinbody10andhavinganopening18extendingtherethrough,withaweb20helicallydisposedbetweentheinnersurfaceofbody10andoutersurfaceoftube16.Thetube16includesontherespectiveendsthereofcirculargrooves517foraccommodationofanO-ringseal.Theweb20isslightlylessthanonehelicalpitchlengthterminatinginrespectiveends22and24whichincluderadicallyparallelsurfaces26adaptedtoconfrontcorrespondingsurfacesoflikemodules.Thus,thesurface26ofhelixend1022isadaptedtoconfronttheoppositelyfacingedgeofend24ofanadjacentmodule.Thewebendsextendoutwardoftheconfrontingendsofbody10typicallybyapproximately1/2thewallthicknessoftheweb,asillustrated.Byhavingthelengthofthehelicalweb15slightlylessthanthehelicalpitchitispossibletoinjectionmoldthemodulebyconventionalmoldingtechniquessinceasseenfromFIG.2thetwohalvesofaninjectionmoldcanopenaxiallyofthemodulewhich,becauseitshelicallengthisslightlylessthanonehelicalpitch,presentsnoundercutstothemoldhalves.Typically,theweblengthisaboutonepercentlessthanthepitchlengthtoprovidesufficientclearanceformoldtooling.

AnembodimentsimilartothatofFIGS.1-3isshowninFIGS.4-6andincludesasheaveintegrallymoldedwiththeconveyormodule.Thesheaveisprovidedaroundthebodycentrallydisposedbetweentherespectiveendsofthebody,thesheavebeingcomposedofalternatingsegments.Afirstarrayofsegmentsisdisposedaroundthebodyinspacedcircumferentialarrangement.Asecondarrayofsegmentsisaxiallyspacedfromthesegmentsandiscircumferentiallydisposedaboutbodyinspacedpositionstaggeredfromthepositionofthesegments,asillustrated.TheconfrontingsurfacesandofrespectivesegmentsanddefineaV-groove,bestseeninFIG.6,configuredtomatewithaV-beltofanexteriordrive.ThemoduleisotherwisethesameasdescribedabovewithrespecttoFIGS.1-3.ThestaggeredarrangementofthesegmentsandallowinjectionmoldingbyconventionalinjectionmoldingtechniquessincethestaggeredarrangementasseenfromFIGS.4-5permitsthemoldhalvestoopenaxiallyofthemoduleandpresentsnoundercutstothemoldhalves.

ThemoduleofFIGS.1-3isaxiallymatedwithlikemodules,asshowninFIG.7,toformaconveyorofdesiredlength.EachofthemodulesisalignedwiththeendsofadjacentbodiesinengagementwithaninterposedO-ring,andwiththeendsofadjacenttubesinengagementwithaninterposedO-ring.Thehelicalwebshavetheiredgesconfrontingtoprovideaneffectivelycontinuoushelicalscrewdisposedwithinthecontinuoustubularbodyformedbythematedmodules.Sincethewebisslightlylessthanonehelicalpitchlength,smallspacesexistbetweentheconfrontin