Butterfly valve, eyaziwa nangokuthi i-flap valve, i-valve elawulayo enesakhiwo esilula, esingasetshenziselwa ukulawula okuphakathi nendawo epayipini lokucindezela okuphansi.I-Butterfly valve ibhekisela ku-valve ingxenye yayo yokuvala (i-valve disc noma ipuleti levemvane) iyidiski futhi izungeza i-valve shaft ukuze ivuleke futhi ivale.
I-valve ingasetshenziswa ukulawula ukugeleza kwezinhlobo ezihlukahlukene zoketshezi olunjengomoya, amanzi, umusi, imidiya ehlukahlukene egqwalayo, udaka, imikhiqizo kawoyela, insimbi ewuketshezi kanye nemidiya ekhipha imisebe.Isetshenziselwa ikakhulukazi ukusika kanye nokudonsa ipayipi.Ingxenye yokuvula neyokuvala ye-butterfly valve iyipuleti levemvane emise okwe-disc, elizungeza i-axis yalo emzimbeni we-valve, ukuze kuzuzwe injongo yokuvula, ukuvala noma ukulungisa.
Ngawo-1930, i-United States yasungula i-uvemvane valve, eyethulwa eJapane ngawo-1950 futhi ayizange isetshenziswe kabanzi eJapane kwaze kwaba ngawo-1960.Yathuthukiswa eChina ngemuva kweminyaka yawo-1970.
Izici eziyinhloko ze-butterfly valve yilezi: i-torque encane yokusebenza, indawo encane yokufaka nesisindo esincane.Ukuthatha i-DN1000 njengesibonelo, i-valve ye-butterfly cishe amathani angu-2, kuyilapho i-valve yesango ingamathani angu-3.5, futhi i-valve ye-butterfly kulula ukuhlanganiswa namadivayisi ahlukahlukene okushayela, ngokuqina okuhle nokuthembeka.Ububi beI-valve ye-butterfly evaliwe yerabhaukuthi uma isetshenziselwa ukudonsa, i-cavitation izokwenzeka ngenxa yokusetshenziswa okungalungile, okuholela ekucwebeni nokulimala kwesihlalo senjoloba.Ngakho-ke, indlela yokukhetha kahle kufanele isekelwe ezidingweni zezimo zokusebenza.
Ubudlelwano phakathi kokuvulwa kwevalve uvemvane nokugeleza kushintsha ngokuyisisekelo ngesilinganiso somugqa.Uma isetshenziselwa ukulawula ukugeleza, izici zayo zokugeleza nazo zihlobene eduze nokumelana nokugeleza kwamapayipi.Isibonelo, ububanzi kanye nefomu lama-valve afakwe kumapayipi amabili afanayo, futhi ukugeleza kwama-valve kuzohluka kakhulu uma i-coefficient yokulahlekelwa kwepayipi ihlukile.Uma i-valve isesimweni sobubanzi obukhulu bokudonsa, i-cavitation kulula ukwenzeka ngemuva kwe-valve plate, engalimaza i-valve.Ngokuvamile, isetshenziswa ngaphandle kuka-15 °.Lapho iuvemvane valveiphakathi nendawo yokuvula, ukwakheka kokuvula okwakhiwa umzimba we-valve kanye nomkhawulo ongaphambili wepuleti uvemvane ugxile ku-valve shaft, futhi kwakheka izimo ezihlukene nhlangothi zombili.Ingxenye engaphambili yepuleti uvemvane ngakolunye uhlangothi ihamba ngendlela yokugeleza kanti olunye uhlangothi lunyakaza lapho lugeleza khona.Ngakho-ke, umzimba we-valve kanye nepuleti le-valve ohlangothini olulodwa lwakha i-nozzle efana nokuvula, kanti olunye uhlangothi lufana nembobo ye-throttle efana nokuvula.Izinga lokugeleza ohlangothini lwe-nozzle lishesha kakhulu kunalelo ohlangothini lwe-throttle, Ingcindezi engalungile izokhiqizwa ngaphansi kwe-valve ye-throttle side, futhi uphawu lwenjoloba luvame ukuwa.
I-torque yokusebenza ye-valve uvemvane inamanani ahlukene ngenxa yokuvuleka okuhlukene kanye nezikhombisi-ndlela zokuvala.I-torque ekhiqizwe i-valve butterfly evundlile, ikakhulukazi i-valve enobubanzi obukhulu, ngenxa yokujula kwamanzi kanye nomehluko phakathi kwamakhanda angaphezulu naphansi we-valve shaft ayikwazi ukushaywa indiva.Ngaphezu kwalokho, lapho indololwane ifakwe ohlangothini lokungena lwe-valve, kwakheka ukugeleza kwe-bias, futhi i-torque izokhula.Uma i-valve iphakathi nendawo, indlela yokusebenza idinga ukuzikhiya ngenxa yesenzo somzuzu oguquguqukayo wokugeleza kwamanzi.
Imboni yama-valve idlala indima ebaluleke kakhulu ekuthuthukisweni komnotho womhlaba njengesixhumanisi esibalulekile semboni yokukhiqiza imishini.Kunamaketanga amaningi embonini yama-valve e-China.Ngokuvamile, i-China ingene ezinhlwini zamazwe ama-valve amakhulu kakhulu emhlabeni.