Flow chart

Introductiontoterms

TheAmericanIndustrialEngineeringStandardsVocabularyhasthefollowingdefinitions:"Processflowdiagramsareintheformofdiagramsandsymbolstoexpresstheworkdonebytheproductthroughsomeorallstagesoftheprocess."

Theinformationincludedinatypicalflowchartincludesquantity,movingdistance,typeofworkdone,andequipmentused.Itcanalsoincludeworkinghours."Inordertofacilitatethelistingoftheprocessflowchart,generallyuseTheinternationallyusedrecordinggraphicsymbolsrepresentvariousactivitiesandactionsintheactualproduction,andgraphicalsymbolsareusedtoindicatethemechanicalequipmentusedintheprocessandtheinterconnectedsystemdiagrams.

WiththecontinuousdevelopmentofcomputertechnologyWiththedevelopment,computer-aideddesignhasbeenwidelyusedinthechemicaldesignprocess.Inthechemicaldesignprocess,chemicalprocessflowchartdrawingisanimportantlink.

BecauseofthelargeworkloadofmanualdrawingofchemicalprocessflowchartAndtheefficiencyislow.AutoCADisusedtodrawthechemicalprocessflowchart.Eachequipmentandpipefittingsarecomposedoflines.Itiscumbersometoaccuratelylocateanddrawthegraphics.

Therefore,accordingtotheHG20519.*-92standardoftheMinistryofChemicalIndustryBasedontheAutoCADsecondarydevelopmentlanguage,themainstreamtechnologyanddevelopmentenvironmentaredevelopedwithCAD,andthechemicalprocessflowchartCADdrawingsoftwareisdevelopedundertheAutoCADenvironment.

Thesoftwarehasstandardmapframesandsoftwarethatcanbeselectedbyusers.Theframecanbeautomaticallylengthenedandmovedtotheleftaccordingtotheuser'sdrawingsituation.Thedrawingofchemicalequipment,pipelines,pipefittings,etc.adoptstheiconmenutodisplayintuitively,thesizeoftheequipmentisdisplayedbytheframeoftheequipment,userpositioning,softwareautomaticdrawing,pipelineautomaticorthogonality,andpipefittingautomaticpositioningdrawingIt’sveryconvenient.

Thesoftwareusesacombinationofpull-downmenus,toolbuttonsandiconmenucommandsfordrawing.Theoperationissimpleandintuitive.Itcanbeusedtodrawprocessflowchartsinthechemical,petroleum,environmentalprotectionandotherrelatedfields.Largerapplicationvalue.

Classification

Theprocessflowdiagramsaregenerallyasfollows:

1.Theoverallprocessflowdiagramormaterialbalancediagramofthewholeplant,Inthechemicalplantdesign,thewholeplantflowchartisprovidedforthegeneraldescription.Foracomprehensivechemicalplant,itiscalledaplant-widematerialbalancediagram.Eachworkshop(worksection)onthediagramisillustratedbyathinsolidlinedrawnwithalongrectangle.Theprocessisshown.Thelineonlydrawsthemainmaterialsandisrepresentedbyathicksolidline.Theprocessdirectionisdrawnontheprocesslinewitharrows.Thefigurealsoindicatesthenameoftheworkshop,thenamesoftherawmaterials,semi-finishedproductsandfinishedproducts,balancedata,sources,anddestinationsofeachworkshop.

2.MaterialflowdiagramMBD(materialbalancediagram)isbasedontheoverallprocessflowdiagramofthewholeplant,whichexpressesthedrawingsoftheinternalprocessmaterialflowineachworkshop.MarkthegroupofeachmaterialontheprocessDistribution,flowandequipmentcharacteristicdata,etc..

3.ProcesspipelineandinstrumentflowchartPID(Piping&InstrumentDiagram)isaprocessflowdiagramwithmoredetailedcontentbasedonthematerialflowdiagram.Drawtherelevantsymbolsofcertainvalves,pipefittings,automaticcontrolinstruments,etc.configuredonthepipelinesandequipment.

Drawingsoftware

ThegeneraldrawingsoftwareoftheprocessflowchartisAutoCAD,butenterprisesanddesigninstitutesgenerallyusesoftwaredevelopedontheAutoCADplatform,suchas:domesticsoftware-PIDCADprocessFlowchartdesignsoftware,processdesignsoftware.

Thelatteristobuildadatabaseofcommonlyusedchemicalequipmentintheformofcomponents,whichcanbedirectlycalledbytheuser.

View

Drawastandardprocessflowdiagram(includingchemicalpartsdrawingandchemicalequipmentdrawing)),thefirststepistoselecttheview,thepurposeoftheviewistoreflecttheactualThestructure,size,andinstallationdimensionsoftheobjectcanclearlyunderstandtheapproximatestructureoftheactualobject.Mostchemicalmachineryandequipmenthavethefeatureofrevolvingbody,sowhenselectingthemainview,theplanewherethemainaxisoftherevolvingbodyislocatedisdefaultedtothemainview.

Afterselectingthemainview,thesecondstepistoselectabasicview,whichismainlyusedasanauxiliary.Atthesametime,therearetwodefaultregulations:

â‘ Whentheequipmentisaverticalequipment,selectthetopviewasthebasicviewoftheequipment;

â‘¡Whentheequipmentisahorizontalequipment,Theleftviewisusuallyusedasthebasicviewofthissetofequipment,andadjustmentscanalsobemadewhenspecialcircumstancesarise.

Afterdeterminingthemainviewoftheequipmentandabasicview,accordingtothecomplexityoftheequipmentandtheactualdrawingneeds,thedrawingofpartsandover-complexpartsismainlycompletedthroughauxiliaryviews.

Drawingprogram

Theprocessflowchartdrawingprogramis:

Firstselectthedrawingsub,titlebar,etc.;secondly,drawthemainequipment;again,drawthepipeline;Then,addvalves,instruments,pipefittings,etc.,andaddannotationinformation;finally,checkthecorrectnessofthedrawing;

Related Articles
TOP