Isimiso sokusebenza

Ukusebenza kufana nalokho kwe-valve yebhola, evumela ukuvala ngokushesha. Amavalvu ovemvane athandwa kakhulu ngoba abiza kancane kuneminye imiklamo yamavalvu, futhi anesisindo esilula ngakho adinga ukwesekwa okuncane. I-disc ibekwe phakathi nendawo yepayipi. Induku idlula kudiski iye ku-actuator engaphandle kwevalvu. Ukuzungezisa i-actuator kuguqula idiski ihambisane noma i-perpendicular ekugelezeni. Ngokungafani ne-valve yebhola, i-disc ihlale ikhona ngaphakathi kokugeleza, ngakho-ke ibangela ukwehla kwengcindezi, ngisho nalapho ivuliwe.

I-valve uvemvane ivela emndenini wamavalvu okuthiwaama-valve e-quarter-turn. Lapho isebenza, i-valve ivuleka ngokugcwele noma ivaliwe lapho i-disc izungeziswa ngokujika kwekota. “Uvemvane” yidiski yensimbi efakwe endukwini. Lapho i-valve ivaliwe, i-disc ivuliwe ukuze ivimbe ngokuphelele umgwaqo. Uma i-valve ivuleke ngokugcwele, i-disc ijikeleziswa ikota ukuze ivumele ukudlula okungavinjelwe koketshezi. I-valve ingase ivuleke kancane kancane ukuze i-throttle flow.

Kunezinhlobo ezahlukene zamavalvu ovemvane, ngalinye lilungiselwe izingcindezi ezihlukene kanye nokusetshenziswa okuhlukile. I-valve uvemvane oyiziro-offset, esebenzisa ukuguquguquka kwenjoloba, inezinga lokucindezela eliphansi kakhulu. I-valve ye-butterfly ye-double offset esebenza kahle kakhulu, esetshenziswa ezinhlelweni zokucindezela okuphezulu kancane, isuswa emgqeni ophakathi nendawo yesihlalo sediski kanye ne-body seal (i-offset one), kanye nomugqa ophakathi we-bore (offset two). Lokhu kudala isenzo se-cam ngesikhathi sokusebenza sokuphakamisa isihlalo ngaphandle kwesigxivizo okuholela ekungqubuzaneni okuncane kunalokho okudalwe kumklamo we-zero offset futhi kunciphisa ukuthambekela kwaso kokugqoka. I-valve efaneleka kakhulu kumasistimu okucindezela okuphezulu ivalve yevemvane ephindwe kathathu. Kule valvu i-axis yokuxhumana yesihlalo sediski iyasuswa, esebenza ukuqeda ukuxhumana okuslayidayo phakathi kwediski nesihlalo. Endabeni yama-valve amathathu e-offset isihlalo senziwe ngensimbi ukuze sikwazi umshini njengokuthola ukuvala okuqinile kwebhamuza lapho uthintana nediski.

Izinhlobo

1. Ama-valve e-butterfly e-concentric - lolu hlobo lwe-valve lunesihlalo senjoloba esiqinile esine-disc yensimbi.
2. Ama-valve e-butterfly e-double-eccentric (ama-butterfly valves aphezulu noma ama-butterfly ama-double-offset) - uhlobo oluhlukile lwezinto ezisetshenziselwa isihlalo kanye nediski.
3. Ama-valve evemvane e-triple-eccentric (ama-valve evemvane e-triple-offset) - izihlalo zingama-laminated noma izihlalo zensimbi eziqinile.

I-valve ye-butterfly yesitayela se-wafer

Ivalvu uvemvane wesitayela se-wafer yakhelwe ukugcina uphawu oluphikisana nomehluko wengcindezi e-bi-directional ukuvimbela noma yikuphi ukugeleza okubuyela emuva kumasistimu aklanyelwe ukugeleza okukodwa. Ifeza lokhu ngophawu oluqinile oluqinile; okungukuthi, i-gasket, i-o-ring, ukunemba ngomshini, kanye nobuso bevalvu eyisicaba emaceleni akhuphuka nomfula kanye naphansi komfula.

I-valve ye-butterfly yesitayela se-Lug

Ama-valve esitayela se-Lug anezifakelo eziluchungechunge ezinhlangothini zombili zomzimba we-valve. Lokhu kuzivumela ukuthi zifakwe ohlelweni kusetshenziswa amasethi amabili amabhawodi futhi awekho amantongomane. I-valve ifakwe phakathi kwama-flange amabili kusetshenziswa isethi ehlukile yamabhawudi ku-flange ngayinye. Lokhu kusetha kuvumela noma yiluphi uhlangothi lwesistimu yamapayipi ukuthi lunqanyulwe ngaphandle kokuphazamisa olunye uhlangothi.

Ivalvu uvemvane wesitayela se-lug esetshenziswa enkonzweni yokuphela kwento ngokuvamile inesilinganiso sokucindezela esincishisiwe. Isibonelo, ivalve yovemvane yesitayela se-lug efakwe phakathi kwama-flange amabili inesilinganiso sokucindezela esingu-1,000 kPa (150psi). I-valve efanayo efakwe nge-flange eyodwa, kusevisi yokugcina efile, inesilinganiso esingu-520 kPa (75 psi). Ama-valve ahlanganisiwe amelana ngokwedlulele namakhemikhali nezincibilikisi futhi angakwazi ukumelana nezinga lokushisa elifinyelela ku-200 °C, okulenza libe yisixazululo esisebenza ngezindlela eziningi.

I-valve ejikelezayo

Ama-valve ajikelezayo enza ukutholwa kwamavalvu ovemvane avamile futhi asetshenziswa kakhulu ezimbonini zokucubungula impushana. Esikhundleni sokuba isicaba, uvemvane luhlome ngamaphakethe. Uma ivaliwe, isebenza ncamashi njengevalve uvemvane futhi iqinile. Kodwa uma ijikeleza, amaphakethe avumela ukwehliswa kwenani elichaziwe lokuqinile, okwenza ivalvu ifanelekele ukudosa umkhiqizo omningi ngamandla adonsela phansi. Ama-valve anjalo ngokuvamile anobukhulu obuncane (ngaphansi kuka-300 mm), avuliwe ngomshini futhi ajikeleze amadigri angu-180 emuva naphambili.

Sebenzisa embonini

Ezimbonini zemithi, amakhemikhali, nokudla, i-valve ye-butterfly isetshenziselwa ukuphazamisa ukugeleza komkhiqizo (okuqinile, uketshezi, igesi) ngaphakathi kwenqubo.Ama-valve asetshenziswa kulezi zimboni ngokuvamile akhiqizwa ngokuvumelana neziqondiso ze-cGMP (umkhuba wokukhiqiza omuhle wamanje). Amavalve ovemvane ngokuvamile athatha indawo yamavalvu ebhola ezimbonini eziningi, ikakhulukazi i-petroleum, ngenxa yezindleko eziphansi nokufaka kalula, kodwa amapayipi anama-butterfly valve awakwazi 'ukucwiliswa' ukuze ahlanzwe.

Umlando

I-valve uvemvane ibisetshenziswa kusukela ngasekupheleni kwekhulu le-18. UJames Watt wasebenzisa i-valve uvemvane kuma-prototypes enjini yakhe yesitimu. Ngokuthuthuka ekukhiqizeni izinto ezibonakalayo nobuchwepheshe, amavalvu ovemvane angenziwa abe mancane futhi amelane namazinga okushisa aphakeme kakhulu. Ngemva kweMpi Yezwe II, kwasetshenziswa amarabha okwenziwa emalungwini e-sealer, okuvumela ukuthi i-butterfly valve isetshenziswe ezimbonini eziningi ezengeziwe. Ngo-1969 u-James E. Hemphill wagunyaza ukuthuthukiswa kwe-valve uvemvane, enciphisa i-torque ye-hydrodynamic edingekayo ukuze kushintshwe ukuphuma kwe-valve.