Kuzokwenzekani kuma-valve ebhola emazingeni okushisa aphansi?

Ezindaweni ezinezinga lokushisa eliphansi, ukusebenza kweama-valve ebholaizothinteka kakhulu, njengoba kuboniswe ngezansi:

Izinguquko ezakhiweni zezinto ezibonakalayo zibangela ubunzima bokusebenza noma umonakalo

Ukushisa okuphansi kungenza impahla yeama-valve ebholai-brittle, ikakhulukazi izinto ezingezona ezensimbi zokuvala uphawu, i-coefficient yayo yokwandisa inkulu kakhulu kunezinto zensimbi. Ngesikhathi sokuncipha kwezinga lokushisa eliphansi, umehluko wokushwabana phakathi kwezigxivizo ezingezona ezensimbi nemizimba yamavalvu ensimbi nama-seal ubalulekile, okuholela ekwehleni okukhulu kwengcindezi yokuvala kanye nokungakwazi ukuvala. Isibonelo, irabha izolahlekelwa ngokuphelele ukunwebeka kwayo futhi ibe ingilazi, ilahlekelwe izici zayo zokuvala lapho izinga lokushisa lingaphansi kwezinga lokushisa lokushintsha kwengilazi; Esiphakathini se-LNG, irabha isenezinto ezikhipha ugwebu futhi ayikwazi ukusetshenziselwa amavalvu e-LNG. Ngaphezu kwalokho, amazinga okushisa aphansi angase futhi abangele ukucindezeleka okuphansi ukuphuka kwempahla. Isibonelo, insimbi engagqwali ye-austenitic, ekuqaleni eyayisesimweni esimetastable emazingeni okushisa aphansi, ishintsha ibe i-martensite lapho izinga lokushisa lehla ngaphansi kwephuzu loshintsho lwesigaba. Ukushintsha kwevolumu kubangela ukwanda kwengcindezi yangaphakathi, okubangela ukuthi indawo yokuvala isonteke futhi igxumeke, okuholela ekuhlulekeni kokuvala.

Ukusebenza kokuvala okuncishisiwe kuholela ekuvuzeni okumaphakathi

Uma izinga lokushisa eliphansii-valve yebholaisebenzisa insimbi ukuya kupheya yokuvala okungeyona eyensimbi, into engeyona eyensimbi izoba nzima futhi ishwabane emazingeni okushisa aphansi, ilahlekelwe ukuqina kwayo, okuholela ekugelezeni okubandayo nokuphumula kwengcindezi, kanye nokuncipha kokuvala ukusebenza. Kodwa-ke, okwamanje lapho uklama ama-valve angamazinga okushisa aphansi, izinto zokuvala ezingezona ezensimbi ngokuvamile azisasetshenziswa uma izinga lokushisa lingaphansi kuka -70 ℃, noma zicutshungulwa zibe yinhlanganisela yensimbi nezingezona ezensimbi. Ngesikhathi esifanayo, ukuncipha kokungalingani okubangelwa ukuhluka kwezinga lokushisa ezingxenyeni ezihlukahlukene zezingxenye noma umehluko wezinto ezibonakalayo phakathi kwezinto ezihlukene kungase futhi kukhiqize ukucindezeleka okubangelwa izinga lokushisa, okubangela ukuhlanekezela okunwebekayo noma ukuhlanekezela okungenakulungiseka kwendawo yokubeka uphawu, okuthinta umphumela wokuvala.

I-valve yebhola eklanywe ngokukhethekile enezinga lokushisa eliphansi ingakwazi ukuzivumelanisa nezimo ezinezinga lokushisa eliphansi

Ukuze ubhekane nenselele yokushisa okuphansi, i-valve yebhola esezingeni eliphansi yamukela umklamo okhethekile. Uma ikhava ye-valve yentamo ende isetshenziselwa ukuvikela ibhokisi lokupakisha futhi iligcine kude namazinga okushisa aphansi ukuze kuqinisekiswe umphumela wokuvala ukupakisha, izinto ezibandayo zokufaka amakhaza nazo zingahlanganiswa ukuze kuvinjelwe ukulahlekelwa kwamandla abandayo; Lapho izinga lokushisa lokusebenza lingaphansi -100 ℃, impahla ye-valve stem iphathwa nge-chrome plating noma i-nitriding ukuze kuthuthukiswe ukuqina kwendawo futhi kuthuthukise ukuthembeka kophawu lokupakisha; Ifakwe isakhiwo sokuvimbela ukuphakama kwengcindezi engavamile, lapho ingcindezi ekamelweni le-valve ikhula, ikamelo kanye ne-inlet ixhunyiwe noma i-valve yokunciphisa ingcindezi ifakwe ekugcineni kwe-inlet ukuqinisekisa ukusetshenziswa okuphephile; I-gasket esetshenzisiwe ingavaleka ngendlela enokwethenjelwa futhi ikwazi ukumelana nezinga lokushisa legumbi, izinga lokushisa eliphansi, nokushintsha kwezinga lokushisa.