4.5.1通气管类型认知CognitionofTypesofVentPipe0

4.5.1通气管类型认知CognitionofTypesofVentPipes一、通气管的作用FunctionsofVentPipes建筑内部排水管道内呈水气两相流动，要尽可能迅速安全地将污废水排到室外，必须设通气管系统。Thereiswaterandgasflowinthedrainagepipelineinsidebuildings.Todischargesewageandwastewateroutdoorsasquicklyandsafelyaspossible,aventpipesystemmustbesetup.一、通气管的作用FunctionsofVentPipes排水通气管系统的作用：FunctionsofDrainageVentPipeSystems:1将排水管道内散发的有毒有害气体排放到屋顶上方的大气中去，以满足卫生要求；Itreleasestoxicandharmfulgasesfromdrainagepipesintotheatmosphereabovetherooftomeetsanitaryrequirements;2向排水管道补给空气，减少气压波动幅度，防止水封破坏；Itsuppliesairtothedrainagepipestoreducethefluctuationamplitudeofairpressureandpreventthewatersealfrombeingdamaged;3增加系统排水能力；Itincreasesthedrainagecapacityofthesystem;4补充新鲜空气，可减轻金属管道的腐蚀，延长管道的使用寿命。Itsupplementsfreshairtoreducemetalpipes'corrosionandprolongtheirservicelife.二、通气管的种类TypesofVentPipes1.通气管的类型TypesofVentPipes通气管的类型主要有：伸顶通气管、专用通气管、主通气立管、副通气立管、结合通气管、环形通气管、器具通气管、汇合通气管等8种。Therearemainly8typesofventpipes,includingstackvent,specialventpipe,mainverticalventpipe,secondaryventstack,yokeventpipe,loopventpipe,fixtureventpipeandconfluenceventpipe.几种典型的通气方式Severaltypicalventilationmodes二、通气管的种类TypesofVentPipes（1）伸顶通气管Stackvent是指排水立管与最上层排水横支管连接处向上垂直延伸室外通气用的管道。Thestackventreferstothepipeverticallyextendingupwardfromtheconnectionbetweenthedrainagestandpipeandthetopdrainagetransversebranchpipetotheoutsideforventilation.二、通气管的种类TypesofVentPipes（2）专用通气管Specialventpipe仅与排水立管相连接，为排水立管内空气流通而设置的垂直通气管道。Thespecialventpipeisaverticalventpipeonlyconnectedtothedrainagestandpipeforaircirculationintheverticaldrainagepipe.二、通气管的种类TypesofVentPipes（3）主通气立管Mainventstack连接环形通气管和排水立管，并为排水横支管和排水立管内空气流通而设置的专用于通气的立管。Themainventstackisaverticalpipespeciallyusedforventilation,whichconnectstheloopventpipeandthedrainagestandpipeandisprovidedforaircirculationinthedrainagetransversebranchpipeandthedrainagestandpipe.（4）副通气立管Secondaryventstack仅与环形通气管相连接，使排水横支管内空气流通而设置的专用于通气的管道。Thesecondaryventstackisapipespeciallyusedforventilation,whichisonlyconnectedwiththeloopventpipetocirculateairinthedrainagetransversebranchpipe.专用通气立管、主通气立管、副通气立管统称通气立管。Thespecialverticalventpipe,mainverticalventpipeandSecondaryventstackarecollectivelyreferredtoasverticalventpipes.二、通气管的种类TypesofVentPipes（5）结合通气管Yokeventpipe排水立管与通气立管的连接管段。Theyokeventpipeistheconnectingpipesectionbetweenthedrainagestandpipeandtheventstack.二、通气管的种类TypesofVentPipes（6）环形通气管Loopventpipe在多个卫生器具的排水横支管上，从最始端卫生器具的下游端接至通气立管的一段通气管段。Theloopventpipeisasectionofventpipeonthedrainagetransversebranchpipesofmultiplesanitarywares,whichisconnectedfromthedownstreamendofthemostinitialsanitarywaretoasectionofventpipeoftheventstack.（7）器具通气管Fixtureventpipes卫生器具存水弯出口端接至主通气管的管段。Thefixtureventpipeisasectionofpipeconnectedtothemainventpipeattheoutletendofthesanitarywaretrap.二、通气管的种类TypesofVentPipes（8）汇合通气管Confluenceventpipe

连接数根通气立管或排水立管顶端通气部分，并延伸至室外大气的通气管段。Theconfluenceventpipeisasectionoftheventpipethatconnectsseveralventstacksortheventilatingpartatthetopofthedrainagestandpipeandextendstotheventpipeoftheoutdooratmosphere.三、通气系统的分类ClassificationofVentilationSystems2.通气系统分类ClassificationofVentilationSystems按立管的个数，可分为：Basedonthenumberofstandpipes,theycanbedividedinto:单立管系统、双立管系统、三立管系统。Single-standpipesystem,double-standpipesystem,andtriple-standpipesystem.（1）设伸顶通气管的单立管排水系统Single-standpipedrainagesystemwiththestackvent定义：排水立管向上延伸，穿出屋顶与大气连通。Definition:drainagestandpipesextendingupwardandpenetratingtherooftoconnectwiththeatmosphere.适用：一般多层建筑。Applicablesituations:generallyformulti-storeybuildings.设伸顶通气管的单立管排水系统Single-standpipedrainagesystemwiththestackvent双立管排水系统Double-standpipedrainagesystem（2）双立管排水系统Double-standpipe

drainage

system定义：由一根排水立管和一根通气立管组成。Definition:consistsofadrainagestandpipeandaventstack.适用：污废水合流的各类多层和高层建筑。Applicablesituation:allkindsofmulti-storeyandhigh-risebuildingswithcombinedsewageandwastewaterflow.三、通气系统的分类ClassificationofVentilationSystems（3）三立管系统Triple-standpipesystem定义：由一根生活污水立管，一根生活废水立管共用一根通气立管组成。Definition:consistsofadomesticsewagestandpipeandadomesticwastewaterstandpipesharingaventstack.适用：生活污水和生活废水需分别排出室外的各类多层、高层建筑。Applicablesituation:al