Ungayikhetha kanjani i-valve yesango lokushisa eliphansi?

Ukukhethwa kweama-gang valvesNgezindawo zokushisa eziphansi kufanele zibhekwe ngokugcwele ezicini ezintathu: ukuqina kwezinto ezibonakalayo, ukusebenza uphawu, kanye nokwakheka okuhlelekile, njengokulandelayo:

Ukuqina Kwezinto Ezibonakalayo: Umnyombo Wezinga lokushisa eliphansi

Ezindaweni eziphansi zokushisa, izinto zokwakha zithambekele ekulahlekelweni ubulukhuni ngenxa yokuthi "okushisa okuphansi okuphansi", okuholela ekuqhekekeni kwama-valves wesango. Lapho ukhetha, okubaluleke kakhulu kufanele kunikezwe izinto zokwakha ezinobunzima obuphansi bokushisa okuphansi:

I-carbon steel / i-alloy ephansi: Ilungele isimo sokushisa esiphakathi nendawo esiphansi esivela ku-20 ℃ kuya -40 ℃, njenge-16mmpn Driflet Trusteres Vescher Vessel Steel, nge-Ithovitha Thristians Steel, i-AT -40 ℃, engahlangana nezidingo ezijwayelekile zezimboni.

Insimbi Engagqwali: Ilungele izimo zokushisa eziphansi eziphansi ngaphansi -196 ℃ (iphuzu elibilayo le-nitrogen ewuketshezi), njengensimbi engu-304 engagqwali (ukuqina kwensimbi engenacala (ukumelana nokuqina okuphansi)

Ama-alloys asuselwa ku-nickel, anjengeMonel Alloy (NI CU Aloy) kanye ne-Infolnel Nickel Alloy (NI CR FE Aloy), alungele izimo eziphansi eziphansi (-253 ℃, azikho engcupheni yokufakelwa okuqinile emazingeni okushisa aphansi.

Ukusebenza uphawu uphawu: Isiqinisekiso sokuvuza kwe-zero

Ukusebenza kokubekwa uphawu kwamazinga okushisa aphansiama-gang valvesKuthinta ngqo ukuphepha kohlelo, futhi ifomu lokufaka uphawu kufanele likhethwe ngokuya ngezimo zokusebenza:

Ukuvalwa kwensimbi

Ukubekwa uphawu kwensimbi: i-polytetrafluoroethylene (PTFE, ukumelana nokushisa -200 ℃ ~ 260 ℃), ukugcwaliswa okuguquliwe kwe-PTFE (izimo zokuvikeleka ezithuthukisiwe), ezilungele isimo sengcindezi ephansi nephansi; I-Graphite eguquguqukayo (Ukumelana Nezinga lokushisa -200 ℃ ~ 1650 ℃), ngokumelana nokushisa okuphansi okuphezulu, okulungele ukushintshana ngokushintshana kwezimo eziphakeme neziphansi zokusebenza okuphansi.

Ukuvalwa kwamehlo: Izinsimbi zensimbi (njengezinsimbi zensimbi ezingama-316 ezingenasici) zingafinyelela "ukuvuza kwe-zero" futhi zilungele imidiya enobuthi obunobuthi obunobuthi, evuthayo futhi evikela ukuxhumanisa okuqondile phakathi kwesiqu se-valve kanye ne-medium, ukunweba impilo yenkonzo.

Idizayini yesakhiwo

Lokushisa eliphansiama-gang valvesUdinga ukunciphisa ukulahleka okubandayo futhi ugweme ukugxila kwengcindezelo ngokwenza okuhlelekile:

Isakhiwo sentamo ende

Ukuvimbela i-Frost kanye nokufakwa: ungqimba olufakwayo (njenge-polyurethane Foam noma i-rock wool) lingafakwa ngaphandle komzimba we-valve ukunciphisa ukulahlekelwa amandla okupholisa; Amanye ama-valves wesango aklanywa "ngezimbobo zokuphefumula" ukuze akhiphe ngokuphepha kokuvuza kwemidiya yokushisa okuphansi futhi agweme ukunqwabelana kwesithwathwa uphawu lwe-valve stem seal.

I-Anti Water Hammer Design: Umgogodla we-Valve kanye nesihlalo samukele ukwakheka okuhleliwe ukunciphisa isando samanzi okubangelwa izinguquko ezingazelelwe kuzinga lokugeleza eliphakathi nendawo (umzimba we-valve unokuvimbela umthelela ophansi kumazinga okushisa aphansi, nesando samanzi kungadala ukuqhuma).