Ohlelweni lokuhambisa uketshezi,I-Valve Yokushisa Okuphezulukuyingxenye yokulawula ebalulekile, enomsebenzi wokulawula, ukuphambukisa, ukulwa nokugeleza emuva, ukusika, kanye ne-shunt. I-valve isetshenziswa kabanzi emikhakheni yezimboni neyezomphakathi. I-valve yokushisa okuphezulu iwuhlobo oluvame ukusetshenziswa kuma-valve. Izakhiwo zayo ezithile yilezi ezilandelayo: ukusebenza kahle kokucima, ukucima okujulile kungenziwa; ukushibilika okuhle; ukumuncwa okuhle komthelela, kunzima ukulimaza ngobudlova; Ukuphuka kwesimo sokushisa kuvame ukuba kuncane njalo njalo. Kunezinhlobo eziningi zama-valve okushisa okuphezulu. Okuvame kakhulu yi-high-temperatureAmavalvu ebhabhathane, izinga lokushisa eliphezuluAmavalvu ebhola, izihlungi zokushisa okuphezulu, kanye nezihlungi zokushisa okuphezuluAmavalvu esango.
Yiziphi izinhlobo zamavalvu zamavalvu okushisa okuphezulu
Amavalvu okushisa okuphezulu afaka amavalvu esango anokushisa okuphezulu, amavalvu okuvala okushisa okuphezulu, amavalvu okuhlola okushisa okuphezulu, amavalvu ebhola anokushisa okuphezulu, amavalvu ebhabhathane anokushisa okuphezulu, amavalvu enalithi yokushisa okuphezulu, amavalvu e-throttle anokushisa okuphezulu, kanye namavalvu okunciphisa ukucindezeleka okushisa okuphezulu. Phakathi kwawo, asetshenziswa kakhulu amavalvu esango, amavalvu omhlaba, amavalvu okuhlola, amavalvu ebhola kanye namavalvu ebhabhathane.
Yiziphi Izimo Zokusebenza Zama-Valve Okushisa Okuphezulu
Izimo zokusebenza zokushisa okuphezulu zifaka phakathi izinga lokushisa eliphansi, izinga lokushisa eliphezulu Ⅰ, izinga lokushisa eliphezulu Ⅱ, izinga lokushisa eliphezulu Ⅲ, izinga lokushisa eliphezulu Ⅳ, kanye nezinga lokushisa eliphezulu Ⅴ, okuzokwethulwa ngokwehlukile ngezansi.
Izinga lokushisa eliphansi kakhulu
Izinga lokushisa eliphansi lisho ukuthi izinga lokushisa lokusebenza le-valve lisesifundeni esingu-325 ～ 425 ℃. Uma i-medium ingamanzi kanye nomusi, i-WCB, i-WCC, i-A105, i-WC6 kanye ne-WC9 zisetshenziswa kakhulu. Uma i-medium ingamafutha aqukethe i-sulfur, i-C5, i-CF8, i-CF3, i-CF8M, i-CF3M, njll., amelana nokugqwala kwe-sulfide, asetshenziswa kakhulu. Asetshenziswa kakhulu kumadivayisi okunciphisa umoya kanye nengcindezi kanye namadivayisi okupheka aphuzile ezindaweni zokuhluza. Ngalesi sikhathi, ama-valve enziwe nge-CF8, i-CF8M, i-CF3 kanye ne-CF3M awasetshenziswa ukumelana nokugqwala kwezixazululo ze-asidi, kodwa asetshenziselwa imikhiqizo yamafutha aqukethe i-sulfur kanye namapayipi kawoyela negesi. Kulesi simo, izinga lokushisa eliphezulu lokusebenza le-CF8, i-CF8M, i-CF3 kanye ne-CF3M lingu-450 ° C.
Izinga lokushisa eliphezulu Ⅰ
Uma izinga lokushisa lokusebenza le-valve lingu-425 ～ 550 ℃, liyisigaba sokushisa okuphezulu I (okubizwa ngokuthi isigaba se-PI). Izinto eziyinhloko ze-valve yesigaba se-PI “insimbi engagqwali yokushisa okuphezulu Ⅰ grade medium carbon chromium nickel rare earth titanium esezingeni eliphezulu engamelani nokushisa” ene-CF8 njengesimo esiyisisekelo ku-ASTMA351 standard. Ngenxa yokuthi isigaba se-PI liyigama elikhethekile, umqondo wensimbi engagqwali yokushisa okuphezulu (P) ufakiwe lapha. Ngakho-ke, uma indawo yokusebenza ingamanzi noma umusi, yize insimbi yokushisa ephezulu i-WC6 (t≤540 ℃) noma i-WC9 (t≤570 ℃) ingasetshenziswa futhi, kuyilapho imikhiqizo kawoyela equkethe i-sulfur ingasetshenziswa futhi insimbi yokushisa ephezulu i-C5 (ZG1Cr5Mo), kodwa ayikwazi ukubizwa ngokuthi i-PI-class lapha.
Izinga lokushisa eliphezulu II
Izinga lokushisa lokusebenza le-valve lingu-550 ～ 650 ℃, futhi lihlukaniswa njengokushisa okuphezulu Ⅱ (okubizwa ngokuthi i-P Ⅱ). I-valve yokushisa okuphezulu yekilasi le-PⅡ isetshenziswa kakhulu kudivayisi yokuqhekeka uwoyela osindayo yefektri yokuhluza. Iqukethe i-valve yesango engagugi yokushisa okuphezulu esetshenziswa ku-nozzle ejikelezayo emithathu nakwezinye izingxenye. Izinto eziyinhloko ze-valve yekilasi le-PⅡ “insimbi eqinile yokushisa okuphezulu Ⅱ grade medium carbon chromium nickel rare earth titanium tantalum reinforced heat-resistant” ene-CF8 njengesimo esiyisisekelo ku-ASTMA351 standard.
Izinga lokushisa eliphakeme III
Izinga lokushisa lokusebenza le-valve lingu-650 ～ 730 ℃, futhi lihlukaniswa njengokushisa okuphezulu III (okubizwa ngokuthi yi-PⅢ). Ama-valve okushisa okuphezulu ekilasi le-PⅢ asetshenziswa kakhulu kumayunithi amakhulu okuqhekeka kwamafutha asindayo ezindaweni zokuhluza. Izinto eziyinhloko ze-valve yokushisa okuphezulu yekilasi le-PⅢ yi-CF8M esekelwe ku-ASTMA351.
Izinga lokushisa eliphezulu Ⅳ
Izinga lokushisa lokusebenza le-valve lingu-730 ～ 816 ℃, futhi lilinganiswa njengokushisa okuphezulu IV (okubizwa ngokuthi i-PIV ngamafuphi). Umkhawulo ophezulu wokushisa kokusebenza kwe-valve ye-PIV ungu-816 ℃, ngoba izinga lokushisa eliphakeme kakhulu elinikezwa yi-ASMEB16134 ejwayelekile yokushisa kokucindezela okukhethiwe kumklamo we-valve lingu-816 ℃ (1500υ). Ngaphezu kwalokho, ngemva kokuba izinga lokushisa lokusebenza lidlula ku-816 ° C, insimbi iseduze nokungena esifundeni sokushisa sokwakha. Ngalesi sikhathi, insimbi isendaweni yokuguqulwa kwepulasitiki, futhi insimbi inobuthi obuhle, futhi kunzima ukumelana nokucindezela okuphezulu kokusebenza kanye namandla okushaya futhi kuyivimbele ekuguquguqukeni. Izinto eziyinhloko ze-valve ye-P Ⅳ yi-CF8M ku-ASTMA351 ejwayelekile njengesimo esiyisisekelo "sokushisa okuphezulu Ⅳ medium carbon chromium nickel molybdenum rare earth titanium tantalum reinforced heat-resistant steel". I-CK-20 kanye ne-ASTMA182 ejwayelekile i-F310 (kufaka phakathi okuqukethwe kwe-C ≥01050%) kanye nensimbi engagqwali engamelana nokushisa ye-F310H.
Izinga lokushisa eliphezulu Ⅴ
Izinga lokushisa lokusebenza le-valve liphakeme kuno-816 ℃, okubizwa ngokuthi i-PⅤ, i-valve yokushisa ephezulu ye-PⅤ (yama-valve okuvala, hhayi ukulawula ama-valve e-butterfly) kumele isebenzise izindlela ezikhethekile zokuklama, njenge-lining insulation lining noma amanzi noma igesi. Ukupholisa kungaqinisekisa ukusebenza okuvamile kwe-valve. Ngakho-ke, umkhawulo ophezulu wokushisa kokusebenza kwe-valve yokushisa okuphezulu yekilasi le-PⅤ awucacisiwe, ngoba izinga lokushisa lokusebenza le-valve yokulawula alinqunywanga nje kuphela yizinto ezibonakalayo, kodwa nangezindlela ezikhethekile zokuklama, futhi isimiso esiyisisekelo sendlela yokuklama siyafana. I-valve yokushisa okuphezulu yekilasi le-PⅤ ingakhetha izinto ezifanele ezingahlangabezana ne-valve ngokuya ngesilinganiso sayo sokusebenza kanye nengcindezi yokusebenza kanye nezindlela ezikhethekile zokuklama. Ku-valve yokushisa okuphezulu yekilasi le-PⅤ, ngokuvamile i-flapper noma i-valve ye-flapper valve noma i-butterfly valve ivame ukukhethwa kuma-alloy aphezulu e-HK-30 kanye ne-HK-40 ku-ASTMA297 standard. Ayikwazi ukumelana nokugqwala, kodwa ayikwazi ukumelana nokushaqeka kanye nemithwalo yokucindezela okuphezulu.
Isikhathi sokuthunyelwe: Juni-21-2021