Okwamanje, i-ivalvu yebhabhathaneiyisakhi esisetshenziselwa ukwenza ukulawulwa kokuvula nokugeleza kohlelo lwamapayipi.
Isetshenziswe kabanzi emikhakheni eminingi efana ne-petroleum, imboni yamakhemikhali, i-metallurgy, amandla kagesi ngamanzi njalo njalo. Kubuchwepheshe obudumile be-butterfly valve, isimo sayo sokuvala sivame ukusebenzisa isakhiwo sokuvala,
Izinto zokuvala ziyirabha, i-polytetraoxyethylene, njll. Ngenxa yokulinganiselwa kwezici zesakhiwo, azifanele izimboni ezifana nokumelana nokushisa okuphezulu, ukumelana nokucindezela okuphezulu, ukumelana nokugqwala, kanye nokumelana nokuguguleka.
I-valve ye-butterfly ekhona ethuthuke kakhulu iyi-valve ye-butterfly eqinile yensimbi ephindwe kathathu. Umzimba obanzi kanye nesihlalo se-valve kuyizingxenye ezixhunyiwe, futhi ungqimba lokuvala lwesihlalo se-valve luhlanganiswe ngezinto ze-alloy ezimelana nokushisa nokugqwala.
Indandatho yokuvala ethambile enezingqimba eziningi inamathele epuletini levalvu. Uma kuqhathaniswa nevalvu yemvabandlela yendabuko, lolu hlobo lwevalvu yemvabandlela lunokumelana nokushisa okuphezulu, kulula ukuyisebenzisa, futhi alunazo izingxabano lapho luvulwa futhi luvalwa. Lapho luvalwa, i-torque yendlela yokudlulisa iyanda ukuze ibuyisele ukuvalwa.
Thuthukisa ukusebenza kokuvala kwevalvu yebhabhathane kanye nezinzuzo zokwandisa impilo yesevisi.
Kodwa-ke, leli valve le-butterfly lisenezinkinga ezilandelayo ngesikhathi sokusetshenziswa
Njengoba indandatho yokuvala ethambile neqinile enezingqimba eziningi inamathele epuletini elibanzi, lapho ipuleti le-valve livame ukuvuleka, indawo ephakathi izoba nokuklwebheka okuhle ebusweni bayo bokuvala, futhi ibhande lokuvala elithambile esentsheni yeshidi lensimbi lizothinta ngqo ukusebenza kokuvala ngemva kokuklwebheka.
Njengoba inqunyelwe yizimo zesakhiwo, lesi sakhiwo asifanele ama-valve anobubanzi obungaphansi kwe-DN200, ngoba isakhiwo sonke sepuleti le-valve sijiyile kakhulu futhi ukumelana nokugeleza kukhulu.
Ngenxa yesimiso sesakhiwo esingavamile kathathu, uphawu oluphakathi kobuso bokuvala ipuleti le-valve kanye nesihlalo se-valve luncike ku-torque yedivayisi yokudlulisa ukuze icindezele ipuleti elibanzi ngokumelene nesihlalo se-valve. Esimweni sokugeleza okuhle, lapho ingcindezi ephakathi nendawo iphakama, i-extrusion yokuvala iqina kakhulu.
Lapho i-flow channel medium ibuyela emuva, njengoba ingcindezi ephakathi ikhuphuka, ingcindezi yeyunithi ephakathi kwepuleti le-valve kanye nesihlalo se-valve ingaphansi kwengcindezi ephakathi, uphawu luqala ukuvuza.
I-valve ye-butterfly eqinile enezinhlangothi ezintathu esebenza kahle kakhulu ibonakala ngokuthi indandatho yokuvala isihlalo ebanzi yakhiwe ngezingqimba eziningi zamashidi ensimbi engagqwali ezinhlangothini zombili zendandatho yokuvala ethambile enomumo we-T. Ubuso bokuvala be-slab kanye nesihlalo se-valve kuyisakhiwo se-oblique cone,
Ubuso bekhoni eligobile lepuleti levalvu buhlanganiswe ngezinto ze-alloy ezingamelani nokushisa kanye nokugqwala; isiphethu esibekwe phakathi kwepuleti lokucindezela lendandatho yokulungisa kanye nebhawodi lokulungisa lepuleti lokucindezela kuhlanganiswe ndawonye.
Lesi sakhiwo silungisa ngempumelelo indawo yokubekezelelana phakathi kwesikhafu somgodi nomzimba wevalvu kanye nokuguquguquka okunwebekayo kwenduku ebanzi ngaphansi kwengcindezi ephakathi, futhi sixazulula inkinga yokuvala ivalvu enqubweni yokudlulisa i-medium eguquguqukayo enezindlela ezimbili.
Indandatho yokuvala yakhiwe ngeshidi lensimbi engagqwali elithambile elinobukhulu obuhlukahlukene obufana no-T ezinhlangothini zombili, elinezinzuzo ezimbili zesivalo esiqinile sensimbi kanye nesivalo esithambile, futhi linokusebenza kokuvala okungavuzi lutho kungakhathaliseki ukuthi izinga lokushisa liphansi noma izinga lokushisa liphezulu.
Ukuhlolwa kufakazela ukuthi lapho ichibi lisesimweni sokugeleza okuhle (isiqondiso sokugeleza kwe-medium sifana nesiqondiso sokuzungeza kwepuleti lovemvane), ingcindezi ebusweni bokuvala ikhiqizwa yi-torque yedivayisi yokudlulisa kanye nesenzo sengcindezi ephakathi epuletini lokuvala.
Uma ingcindezi ephakathi nendawo ikhuphuka, lapho ubuso bekhoni eligobile lepuleti le-valve kanye nobuso bokuvala besihlalo se-valve kucindezelwa khona, kuba ngcono umphumela wokuvala. Esimweni sokugeleza okuphambene, uphawu oluphakathi kwepuleti le-valve kanye nesihlalo se-valve luncike ku-torque yedivayisi yokushayela ukuze kucindezelwe ipuleti le-valve esihlalweni se-valve.
Ngokwanda kwengcindezi ephakathi nendawo ebuyela emuva, lapho ingcindezi ephakathi kwepuleti levalvu nesihlalo sevalvu ingaphansi kwengcindezi ephakathi,
Amandla okuguqulwa agciniwe entwasahlobo yendandatho yokulungisa ngemva kokulayishwa angavala ingcindezi eqinile yendawo yokuvala yepuleti yevalvu kanye nesihlalo sevalvu ukuze kulungiswe ngokuzenzakalelayo.
Ngakho-ke, ngokungafani nobuciko bangaphambilini, imodeli yokusetshenziswa ayifaki indandatho yokuvala eqinile enezingqimba eziningi epuletini levalvu, kodwa iyifaka ngqo emzimbeni wevalvu. Ukwengezwa kwendandatho yokulungisa phakathi kwepuleti lokucindezela nesihlalo sevalvu kuyindlela efanelekile kakhulu yokuvala eqinile enezindlela ezimbili.
Ingathatha indawo yamavalvu esango, amavalvu eglobhu kanye namavalvu eglobhu.