《水处理技术（双语）》课件——蝶阀.pptxVIP

Butterflyvalves蝶阀

蝶阀的工作原理Theworkingprincipleofbutterflyvalve蝶阀的定义：Dccbutterflyvalve蝶阀是用圆形蝶板作启闭件并随阀杆转动来开启、关闭和调节流体通道的一种阀门。蝶阀的蝶板安装于管道的直径方向。Thebutterflyvalveisavalvethatusesaroundbutterflyplateastheopeningandclosingmemberandrotateswiththestemtoopen,closeandregulatethefluidpassage.Thebutterflyplateofabutterflyvalveisinstalledinthedirectionofthediameterofthepipe.在蝶阀阀体圆柱形通道内，圆形蝶板绕着轴线旋转，旋转角度为0°～90°之间，旋转到90°时，阀门则呈全开状态。Inthecylindricalchannelofthebutterflyvalvebody,thecircularbutterflyplaterotatesaroundtheaxis,therotationangleisbetween0°and90°,andwhenitrotatesto90°,thevalveisfullyopen.

蝶阀的分类Classificationofbutterflyvalves1)按阀板形式Accordingtotheformofvalveplate按阀板形式蝶阀可分为中心对称板、偏置板、斜置板，如图所示。AccordingtoAccordingtotheformofthevalveplatebutterflyvalvecanbedividedintocenter-symmetricalplate,offsetplate,obliqueplate,asshowninthefigure.

蝶阀的分类Classificationofbutterflyvalves2）按密封形式Bysealingform图为软密封型蝶阀thesoftsealtypebutterflyvalve图为硬密封型蝶阀thehardsealtypebutterflyvalve可分为软密封型和硬密封型两种。软密封型一般采用橡胶环密封，硬密封型通常采用金属环密封。Itcanbedividedintotwotypes:softsealtypeandhardsealtype.Softsealtypegenerallyusesrubberringseal,andhardsealtypeusuallyusesmetalringseal.

蝶阀的分类Classificationofbutterflyvalves有对夹式蝶阀、法兰式蝶阀、对焊式蝶阀三种。Therearethreekindsofbutterflyvalves,namely,theclamptypebutterflyvalve,theflangetypebutterflyvalveandthebutt-weldingtypebutterflyvalve.对夹式蝶阀是用双头螺栓将阀门连接在两管道法兰之间；Clamp-onbutterflyvalveisadouble-headedboltthatconnectsthevalvebetweentwopipeflanges法兰式蝶阀是阀门上带有法兰，用螺栓将阀门上两端法兰连接在管道法兰上；Flangedbutterflyvalvesarevalveswithflangesonthem,withboltsconnectingtheflangesonbothendsofthevalvetothepipeflange.对焊式蝶阀的两端面与管道焊接连接。Butt-weldedbutterflyvalveshavetwoendfacesweldedtothepipe.图为对夹式蝶阀thebuttressbutterflyvalve图为法兰式蝶阀flangetypebu