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I-steam eveliswa ngamabhoyili amanzi ashushu isetyenziswa ngokubanzi kwizicelo zoshishino. Iinkqubo zemizi-mveliso ezifana nokomisa, umsebenzi woomatshini, ukuveliswa kwamandla kunye nokufudumeza inkqubo zizinto eziqhelekileyo zokusetyenziswa komphunga. Ivalve yomphunga isetyenziselwa ukunciphisa uxinzelelo lwe-steam yokungena kunye nokulungelelanisa ngokuchanekileyo kunye nokulawula umphunga kunye nobushushu obunikezelwa kwezi nkqubo.
Ngokungafaniyo nolunye ulwelo lwenkqubo yeshishini, umphunga uneempawu ezithile, okwenza kube nzima ukulawula ngeevalvu. Ezi mpawu zinokuba ngumthamo ophezulu kunye nobushushu kunye nomthamo wayo wokunciphisa, onokukhawuleza ukunciphisa umthamo ngamaxesha angaphezu kwewaka. Ukuba usebenzisa ivalve njengesixhobo sokulawula inkqubo, kukho izinto ezininzi zokuqwalaselwa xa usebenzisa umphunga.
Ezi zilandelayo zezona mpazamo zi-7 zinzima kakhulu kwiinkqubo zevalvu ekungafanele uzenze xa usebenzisa umphunga. Olu luhlu aluquki zonke izilumkiso zolawulo lwevalvu yomphunga. Ichaza imisebenzi eqhelekileyo edla ngokubangela umonakalo okanye iimeko ezingakhuselekanga xa uzama ukulawula umphunga.
Wonke umntu uyazi ukuba umphunga uya kuxinana, kodwa xa kuxoxwa ngenkqubo yolawulo lwemibhobho yomphunga, olu phawu lucacileyo lomphunga ludla ngokulibaleka. Uninzi lwabantu lucinga ukuba umgca wemveliso uhlala uphezulu kwiqondo lokushisa kunye negesi, kwaye i-valve yenzelwe oku.
Nangona kunjalo, umgca we-steam awuhlali uqhuba ngokuqhubekayo, ngoko uya kupholisa kwaye udibanise. Kwaye i-condensation ihamba kunye nokunciphisa kakhulu umthamo. Nangona izibatha zomphunga ziwuphatha ngokufanelekileyo umphunga ojikisiweyo, umsebenzi wevalve kumgca womphunga kufuneka uyilelwe ukunyanga amanzi alulwelo, adla ngokuba ngumxube wolwelo kunye negesi.
Xa umphunga unyanzelela amanzi angenakunyanzeliswa ukuba akhawuleze ngokukhawuleza kwaye avale iivalve okanye izifakelo, ihamile yamanzi iya kwenzeka kwimibhobho yomphunga. Amanzi anokuhamba ngesantya esiphezulu, ebangela ingxolo kunye nokuhamba kombhobho kwiimeko ezincinci, okanye iziphumo eziqhumayo kwiimeko ezinzima, ezibangela umonakalo kwimibhobho okanye izixhobo. Xa usebenza ngomphunga, ivalve kumbhobho wenkqubo kufuneka ivulwe okanye ivalwe kancinane ukuthintela ukugqabhuka kolwelo ngequbuliso.
Iivalve ezenzelwe ukusetyenziswa kwe-steam kufuneka zisebenze phantsi kweemeko zoyilo loxinzelelo kunye nobushushu. I-steam ikhula ngokukhawuleza ibe ngumthamo omkhulu. Ukunyuka kwe-20 K kwiqondo lokushisa kuya kuphinda kabini uxinzelelo kwi-valve, enokuthi yenzelwe iingcinezelo ezinjalo. Ivalve kufuneka yenzelwe imeko embi kakhulu (uxinzelelo olukhulu kunye nobushushu) kwinkqubo.
Impazamo eqhelekileyo ekuchazweni kwevalvu kunye nokukhetha luhlobo olungalunganga lwesivalo sokusetyenziswa komphunga. Uninzi lweendidi zevalvu zingasetyenziswa kusetyenziso lomphunga. Nangona kunjalo, babonelela ngemisebenzi eyahlukeneyo kunye nolawulo. Iivalvu zebhola okanye iivalvu zesango zibonelela ngolawulo oluchanekileyo lokuhamba, olufikelelwa ngakumbi kuneevalve zebhabhathane. Ngenxa yesantya esikhulu sokuhamba, lo mahluko ubalulekile kwizicelo zomphunga. Ezinye iintlobo zeevalvu eziqhelekileyo ekufakweni komphunga zizivalo zesango kunye neevalvu zediaphragm.
Impazamo efanayo ekukhetheni uhlobo lwevalvu lukhetho lohlobo lwe-actuator. I-actuator isetyenziselwa ukuvula nokuvala ivalve ukude. Nangona i-actuator evuliwe/evaliweyo inokwanela kwezinye izicelo, uninzi lwezicelo zomphunga zifuna uhlengahlengiso lwe-actuator ukuze lilawule ngokuchanekileyo uxinzelelo, ubushushu kunye nomthamo.
Ngaphambi kokukhetha ivalve yokusetyenziswa komphunga, thatha ixesha elithile ukuqikelela ukuhla koxinzelelo olulindelekileyo kwivalve. I-valve ye-1.25-intshi inokunciphisa uxinzelelo oluphezulu ukusuka kwi-145 psi ukuya kwi-72.5 psi, ngelixa i-valve ye-2-intshi kwindlela efanayo yomlambo iya kunciphisa uxinzelelo lwe-145 psi ukuya kwi-137.7 psi kuphela.
Nangona ukusebenzisa iivalvu ezincinci kunendleko kwaye kuyahenda, ngakumbi xa zanele, ngelishwa ziqhelene nengxolo. Zikwanxulumene nokungcangcazela okunciphisa ubomi beevalvu kunye nokufakelwa kwemibhobho. Qwalasela ivalve enkulu kunemfuneko yokulawula ingxolo kunye nokungcangcazela. Ivalve yomphunga nayo inesixhobo esikhethekileyo sokunciphisa ingxolo.
Enye impazamo kumlinganiselo wevalvu kukucutheka kwenqanaba elinye loxinzelelo. Ibangela isantya esiphezulu somphunga kwindawo yokukhupha ivalvu ukuba inxibe umphezulu kwinkqubo ebizwa ngokuba lukhukuliseko. Ukuba unikezelo loxinzelelo lomphunga luyimiyalelo emininzi yobukhulu obungaphezulu kunemfuno yendawo, nceda ucinge ngokunciphisa uxinzelelo kwizigaba ezibini nangaphezulu.
Inqaku lokugqibela lobungakanani bevalvu luxinzelelo olubalulekileyo. Le yindawo apho ukunyuka okungaphezulu koxinzelelo oluphezulu akuyi kwandisa ukuhamba komphunga kwivalve. Ibonisa ukuba i-valve incinci kakhulu kwisicelo senkqubo efunekayo. Gcina ukhumbule ukuba ubukhulu be-valve akufanele bube bukhulu kakhulu ukuphepha "ukuguqula", okwenzekayo xa utshintsho oluncinci kwindawo yevalve lubangela utshintsho oluphawulekayo kumsebenzi wokulawula, ngakumbi phantsi komthwalo oyingxenye.
Uyilo lweevalvu zomphunga kunye neenkqubo zazo zinokuba nzima. Iinkcukacha zokuphatha umahluko wevolumu phakathi kwamanzi kunye nomphunga, ukudibanisa, ihamile yamanzi kunye nengxolo inokubhida. Abantu abaninzi benza ezi mpazamo ziqhelekileyo xa beyila inkqubo yomphunga, ngakumbi kumzamo wokuqala. Ngapha koko, ukwenza iimpazamo kuyinxalenye yendalo yokufunda. Ukwazi ulwazi ngokupheleleyo kunokukunceda ukuba uphephe iimpazamo ezinokukhokelela ekunyuseni iindleko kunye nexesha lokunciphisa usetyenziso lwe-steam.
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Ixesha lokuposa: Oct-08-2021
