Ngama-30s, i-uvemvane valveyasungulwa e-United States, yethulwa eJapan ngeminyaka yama-50s, futhi yasetshenziswa kakhulu eJapan ngeminyaka yama-60s, futhi yathuthukiswa eChina ngemuva kweminyaka yama-70s. Njengamanje, ama-valve ovemvane angaphezu kwe-DN300 mm emhlabeni kancane kancane ashintsha ama-valve esango. Uma kuqhathaniswa neama-valve esango, ama-butterfly valve anesikhathi esifushane sokuvula nokuvala, i-torque encane yokusebenza, indawo encane yokufaka nesisindo esincane. Ukuthatha i-DN1000 njengesibonelo, i-valve ye-butterfly imayelana ne-2T, futhi i-valve yesango imayelana ne-3.5T, futhi i-valve ye-butterfly kulula ukuyihlanganisa namadivayisi ahlukahlukene okushayela, ngokuhlala okuhle nokuthembeka.
Ububi be-rubber sealuvemvane valveukuthi uma isetshenziselwa ukudonsa, i-cavitation izokwenzeka ngenxa yokusetshenziswa okungalungile, okuzokwenza ukuthi isihlalo senjoloba siphume futhi sonakaliswe. Eminyakeni yamuva nje, i-China iphinde yakha ama-valve uvemvane avaliwe ngensimbi, futhi eminyakeni yamuva nje, iJapane iphinde yasungula ama-valve uvemvane amise okwekama anokumelana ne-cavitation, ukudlidliza okuphansi nomsindo ophansi.
Impilo yesevisi yesihlalo esijwayelekile sokubekwa uphawu yiminyaka eyi-15-20 yerabha kanye neminyaka engama-80-90 yensimbi ngaphansi kwezimo ezijwayelekile. Nokho, indlela yokukhetha kahle incike ezidingweni zezimo zokusebenza.
Ubudlelwano phakathi kokuvulwa kwe-auvemvane valvefuthi izinga lokugeleza ngokuyisisekelo linomugqa futhi liyalingana. Uma isetshenziselwa ukulawula izinga lokugeleza, izici zayo zokugeleza nazo zihlobene eduze nokumelana nokugeleza kwamapayipi, njengobubanzi nokwakheka kwama-valve afakwe kumapayipi amabili kuyafana, futhi i-coefficient yokulahlekelwa kwepayipi ihlukile. , futhi izinga lokugeleza kwe-valve lizohluka kakhulu.
Uma i-valve isesimweni sokudonsa okukhulu, ingemuva lepuleti le-valve lithambekele ku-cavitation, futhi kukhona ithuba lokulimaza i-valve, ngakho-ke ngokuvamile isetshenziswa ngaphandle kwe-15 °.
Lapho i-valve uvemvane iphakathi kokuvula, ijamo lokuvula elakhiwe yi-i-valveumzimba kanye nengxenye engaphambili yepuleti uvemvane kugxiliswe ku-valve shaft, futhi izinhlangothi zombili zakha izimo ezihlukene, ingxenye engaphambili yepuleti uvemvane ohlangothini olulodwa inyakaza lapho amanzi agelezayo, kanti olunye uhlangothi luya lapho amanzi agelezayo, ngakho-ke, umzimba we-valve ohlangothini olulodwa kanye nepuleti le-valve lakha ukuvuleka okumise okwe-nozzle, kanti olunye uhlangothi lufana nokuvuleka okumise okwembobo ye-throttle, uhlangothi lwe-nozzle lushesha kakhulu kunohlangothi lwe-throttle, futhi ukucindezela okungalungile kuzokwenziwa ngaphansi kwe-valve ye-throttle side, futhi uphawu lwerabha ngokuvamile luyawa.
I-torque yokusebenza ye-valve ye-butterfly, ngenxa yendlela ehlukile yokuvula nokuvulwa kwe-valve, inani layo lihlukile, futhi i-valve butterfly evundlile, ikakhulukazi i-valve yobubanzi obukhulu, ngenxa yokujula kwamanzi, i-torque eyenziwa umehluko phakathi ikhanda eliphezulu neliphansi le-valve shaft alikwazi ukunganakwa. Ngaphezu kwalokho, lapho i-elbow ifakwe ohlangothini lokungena lwe-valve, kwakheka ukugeleza kokuphambuka, futhi i-torque iyanda. Uma i-valve iphakathi nendawo, indlela yokusebenza idinga ukuzikhiya ngenxa yesenzo se-torque yokugeleza kwamanzi.
Isikhathi sokuthumela: Aug-22-2024
