1、BRITISH STANDARD BS EN ISO 15236-4:2004 Steel cord conveyor belts Part 4: Vulcanized belt joints The European Standard EN ISO 15236-4:2004 has the status of a British Standard ICS 53.040.20 BS EN ISO 15236-4:2004 This British Standard was published under the authority of the Standards Policy and Str
2、ategy Committee on 24 June 2004 BSI 24 June 2004 ISBN 0 580 43977 1 National foreword This British Standard is the official English language version of EN ISO 15236-4:2004. It is identical with ISO 15236-4:2004. The UK participation in its preparation was entrusted to Technical Committee PRI/67, Con
3、veyor belts, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogu
4、e under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correc
5、t application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests infor
6、med; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document
7、indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO152364 June2004 ICS53.040.20 Englishversion SteelcordconveyorbeltsPart4:Vulcanizedbeltjoints(ISO 152364:2004) CourroiestransporteusescblesdacierP
8、artie4: Jonctionsvulcanisesdescourroies(ISO152364:2004) StahlseilFrdergurteTeil4:Vulkanisierte Gurtverbindungen(ISO152364:2004) ThisEuropeanStandardwasapprovedbyCENon2February2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standa
9、rdthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra
10、 nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,L
11、ithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyfo
12、rmandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO152364:2004:EENISO152364:2004(E) 2 Contents Page Foreword . 3 1 Scope 4 2 Termsanddefinitions. 4 3 Symbolsandunits . . 4 4 Typesofjoints. 4 5 Jointmaterial . 9 6 Makingthejoint . 9 7 Markingthejoint. . 10ENISO152364:2004(E) 3 Forewo
13、rd Thisdocument(ENISO152364:2004)hasbeenpreparedbyTechnicalCommitteeCEN/TC188 “Conveyorbelts”,thesecretariatofwhichisheldbyBSI,incollaborationwithTechnicalCommittee ISO/TC41“Pulleysandbelts(includingveebelts)”. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofan iden
14、ticaltextorbyendorsement,atthelatestbyDecember2004,andconflictingnationalstandards shallbewithdrawnatthelatestbyDecember2004. ENISO15236willconsistofthefollowingparts,underthegeneraltitle Steelcordconveyorbelts : Part1:Design,dimensionsandmechanicalrequirementsforconveyorbeltsforgeneraluse Part2:Pre
15、ferredbelttypes Part3:Specialsafetyrequirementsforbeltsforuseinundergroundapplications Part4:Vulcanizedbeltjoints Part5:Marking AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthe followingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Cyprus,Czech R
16、epublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Slovakia,Slovenia, Spain,Sweden,SwitzerlandandUnitedKingdom.ENISO152364:2004(E) 4 1Scope ThispartofENISO15236specifiesdesign,dimensions,requiremen
17、tsandmarkingofvulcanized jointsforsteelcordconveyorbelts. 2 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermanddefinitionapplies. vulcanizedjoint areawithinwhichthecordsfromtwobeltlengthsarejoinedandvulcanizedthroughthesurrounding rubber 3 Symbolsandunits Forthepurposesofthi
18、sEuropeanStandard,thesymbolsandunitsgiveninTable1apply. Table1Symbolsandunits Symbol Explanation Unit d Corddiameter mm K N Nominalbreakingstrengthofthebelt N/mm K Nred Reducedbreakingstrengthofthejoint N/mm l p Lengthofcordendstaggeringarea mm l q Lengthofthecordtransitionarea mm l s Buttendclearan
19、ceofthecordends mm n st Numberofsteps SG Thicknessofrubberbetweenthecordsinthejoint mm SG min Minimumthicknessofrubberbetweenthecordsinthejoint mm t Pitch mm t min Minimumspacingofthecordinthebelt mm 4 Typesofjoints 4.1General Therearetwotypesofjointsdifferinginthewaythatforcesaretransferredfromoneb
20、eltlengthtothe other: a)stepped joints; wheretheforcesaretransferredbytherubbersurroundingthecords. b)finger joints;ENISO152364:2004(E) 5 wheretheforcesaretransferredbytherubbersurroundingthecordsandbythetransverse reinforcements.Forthistypeofjoint,transversereinforcementisrequired. NOTE1 Steppedjoi
21、ntsofferthehighestpossibledynamicperformancebutrequireahighamountoftime, knowledge,andcareintheirfabrication. NOTE2 Forbothtypesofjoint,thephysicalpropertiesoftherubber,especiallytheadhesiontothecords,are ofutmostimportanceforthequalityofthejoint. 4.2 Steppedjoints 4.2.1 Designprinciples Thecordsoft
22、hebeltendstobejoinedarecutfreefromthecoverrubberinthejointarea.According toanagreedjointpattern,thecordsarecutorseparatedinstepsandcutfreefromthecorerubber wherenecessary.Thecordsofbothendsaremergedintoeachother,embeddedinbondingrubber andcoveredwithcoverrubber.Aftervulcanizingthejointwillbeabletotr
23、ansmitforcesfromonebelt lengthtotheother. Unlikejointsinconveyorbeltswithtextilereinforcementsforwhichthebeltendsaregenerallycutina bias,theendsofsteelcordbeltsarecuteitherinabiasorperpendiculartothebeltedgeorinabias forjoining. Thenumberofsteps,thelengthofthejoint,thelengthofthestepsandthejointpatt
24、ern,i.e.the sequenceofcutsofthecords,iseitherspecifiedbythebeltmanufacturersorisgivenincompany standardsornationalstandards. Inadditiontopracticalexperience,thequalityofasteppedjointcanbeevaluatedbythecalculationof thestressesoftherubberandthecordswithinthejointorbystaticanddynamictestingmethods. 4.
25、2.2 Rubbergapinthejoint Therubberfillingthegapbetweentwoadjacentcordsfromdifferentlengthsisstrainedmostand receivesthehigheststresses.Aminimumdistance SG min ofthecordswithinthejointthereforehasto bekept,asfollows. () d SG + 1 , 0 2 , 1 min 4.2.3 Buttendclearance Forcordsmeetinginthejoint,thedistanc
26、eofthebuttends, l s, shallbeapproximately4x dbutnot lessthan3x d. 4.2.4Steps Jointsshallbecarriedoutas1step,2step,3step,or4stepjoints,althoughhighernumbersofsteps arepermitted. Accordingtothenumberofstepsdetermined,thecordsshallbecutinasequencerepeated throughoutthebeltwidth. 4.2.5 Interlacedstepped
27、joint Itischaracteristicofthistypeofjointthatitcontainsalargernumberofcordsthanthebeltitself.ENISO152364:2004(E) 6 Onbothsidesofthejoint,alength, l q, shallbeallowedfortransitionofthecords, l q beingafunction ofthecorddiameter.PreferredtransitionlengthsofthecordsaregiveninTable2.Transitionlengths sh
28、allbenotlessthan16xthecorddiameter. Table2Transitionlengthofcords D (mm) l q (mm) 6,0 100 6,0 8,5 150 8,5 10,0 200 10,0 11,5 250 NOTE Cordendstaggeringwhere lpis50mmisbeneficial. Partofa2stepinterlacedjointrectangularcutandcutonbiasisshowninFigure1.ENISO152364:2004(E) 7 l s l p SG d l p l q lq a)Rec
29、tangularcut SG l s l q lq l p l p b)Cutonabias Key SeeTable1forexplanationofsymbols Figure1Partof2stepinterlacedjointrectangularcutandcutonabiasENISO152364:2004(E) 8 4.2.6 Plainsteppedjoint 4.2.6.1 Minimumcordspacinginthebelt Plainsteppedjointsshallcontainthesamenumberofcordsinthejointasinthebeltits
30、elf.The minimumcordspacingofthebelt t min shall, therefore,beasfollows. min min SG d t + = NOTE Smallerspacingswillreducethequalityofthejointandshouldbeavoided. 4.2.6.2 Breakingstrengthofthejoint Theactual breakingstrengthofajointmaybecalculatedfromthenumberofadhesionareasbetween theendsofoppositebe
31、lts. N st st Nred K n n K + 1 4.2.6.3 Cordpattern Plainsteppedjointsshallbeeither“organpipejoints”or“firtreejoints”asillustratedinFigure2. l s l s S G d a)Organpipejoint b)Firtreejoint Figure2Partsoftypical4stepplainsteppedjoints 4.2.7 Transversereinforcements 1) Thepeakstressesonthematerialinthejoi
32、ntcanbereducedbytransversereinforcementsinthe splice,i.e.thestressesareequalized.Transversereinforcementsshallendatleast50mmfromthe covertransitionarea. 1) Acalculationshowslowerstressesforthe“organpipe”typethanforthe“firtree”joint.ENISO152364:2004(E) 9 4.3 Fingerjoints Tomakefingerjointscordsshallb
33、esuchthattheycanbecutaccuratelybyscissorsorascissorslike tools.Thereforethistypeofjointisnormallylimitedtobeltinghavingamaximumcorddiameterof3,3 mm. Tomakeafingerjoint,thecoversandtransversereinforcementsshallberemovedinthejointareaof bothbeltends.Triangularpiecesshallbecutinsuchaway,that“tongues”of
34、thebeltareleft.These “tongues”or“fingers”frombothendsshallbemergedintoeachother,coveredwithrubberized transversereinforcementsandcoversheetsandvulcanised(seeFigure3). NOTE1 Transversereinforcementswithinthejointareaareessentialforthequalityofthejoint. Thelengthandthewidthofthefingersshalleitherbespe
35、cifiedbythebeltmanufacturersorbegiven incompanystandardsornationalstandards. Figure3Partofafingerjoint NOTE2 Alossofstaticstrengthinthespliceisunavoidable,theextentofthelossbeingdependentonthe constructionofthesplice. 5 Jointmaterial Thejointmaterialshallbechosenforthebelttypestobejoined,ensuringtha
36、tthematerialwillnotbe spoiledbyageing. 6 Makingthejoint Theheatingplatensshallbeatleast150mmlargerthanthejointonbothsidesinthelongitudinal directionandshallatleastcoverthesideironsinthetransversedirection. Theheatingplatensshallbeloadedevenlywithapressureofatleast1MPa.Mechanicalpressure equipmentsha
37、lluseadevicetoevenouttheappliedpressure. Unlessotherwiseagreedbetweenthemanufacturerandpurchaser,whenmakingthejointthereshall beanequalthicknessoftherubberbetweenthecords. Whenmakingjointsthefollowinggeneralguidanceshallbeobserved: ensurealargeadhesionareabybevellingthecovertransitionzones; leaveaco
38、atofadhesionrubberonthecord;ENISO152364:2004(E) 10 carefullyfillthespacebetweenthecordswithasufficientqualityofadhesionrubber; useamaterialwithahighadhesion. Inadditionforinterlacedsteppedjoints: avoidcordslyingbuttatthebeltedges; transfernecessarydeviationsfromthepatternofthejointtothecentreofthebe
39、lt. NOTE Detailedinformationaboutbeltjointmanufacturingandrequirementsforcuringareprovidedbythe manufacturerorbycompaniesspecializedinbeltservice. 7 Markingthejoint Thejointshallbeprovidedwithaneasytoreadlastingmarking.Lettersandnumeralsshallhavea heightofatleast20mmandalinewidthofatleast3mm. Themar
40、kingsshallbeintheordershowninthefollowingexample: 6/94 NN 15 21 date(monthandyear) manufacturerofthejoint numberofthejoint vulcanizersidentificationnumberblankBS EN ISO 15236-4:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body respon
41、sible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendm
42、ents or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be fou
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