Kwenzeka ntoni xa iivalvu zemizi-mveliso zijongene neemeko ezimandundu-nokuba ngamaqondo obushushu angaphantsi kwe-zero kwigesi yendalo elulwelo okanye ubushushu obutshisayo kwimibhobho yomphunga? Impendulo ixhomekeke kubunjineli bevalvu ekhethekileyo. Ukukhetha uhlobo lwevalve oluchanekileyo kwiimeko zobushushu obugqithisileyo ayipheleli nje ekusetyenzweni—kumalunga nokhuseleko, ubomi obude, kunye nokusebenza kakuhle.
Kule nqaku, sihlolisisa ukungafani kobugcisa phakathi kwee-valve ze-cryogenic kunye ne-high-temperature valves, ukugqamisa ukuqwalaselwa koyilo, ukukhethwa kwezinto eziphathekayo, iteknoloji yokutywinwa, kunye nendlela yokuqinisekisa ukuthembeka phantsi koxinzelelo lwe-thermal.
Ubushushu bufuna uYilo lweValve yeMilo
Iivalvu ezisebenza kwingqele egqithisileyo okanye kubushushu obugqithisileyo kufuneka zilungelelaniswe ukumelana notshintsho oluthile lomzimba olwenzeka kwiindawo abasebenza kuzo.
Iivalvu zeCryogenic, eziqhele ukusetyenziswa kwizicelo ezibandakanya iirhasi ezinyibilikisiweyo ezifana ne-LNG okanye ioksijini engamanzi, zisebenza kumaqondo obushushu asezantsi njenge -196°C. Kumaqondo obushushu aphantsi ngolo hlobo, imathiriyeli iba brittle, kwaye nokuvuza okuncinci kunokubangela iingozi zokusebenza. Ezi zivalo kufuneka ziyilwe ngeebhonethi ezongeziweyo ukuze zigqume isiqu kumajelo abandayo kwaye zithintele iqabaka okanye ukuxhuzula.
Ngokwahlukileyo koko, iivalvu zobushushu obuphezulu zenziwa ukuba zisebenze phantsi kokubekeka ngokuqhubekayo kubushushu—ngokuqhelekileyo budlula kuma-400°C. Ezi ziqhele ukusetyenziswa kwizityalo zamandla, iindawo zokucoca, kunye neenkqubo zoxinzelelo oluphezulu lomphunga. Apha, umngeni ulele ekwandeni kwe-thermal, i-oxidation, kunye nokugcina i-torque engaguqukiyo kunye namandla okutywina.
Ukukhethwa kwezinto ezibonakalayo: Ukuzinza ngaphantsi kwe-Extremes
Ukukhetha izinto ezifanelekileyo kubalulekile kuzo zombini i-cryogenic kunye ne-high-temperature valves.
Kwi-valve ye-cryogenic, i-stainless steels kunye ne-nickel alloys zisetyenziswa ngokuqhelekileyo ngenxa yokuqina kwazo okuphezulu kunye nokuzinza kwesakhiwo kumaqondo aphantsi. Ezi zixhobo zichasene nokuqhekeka kunye nokugcina iimpawu zabo zokutywinwa nangona zibonakaliswe ukupholisa ngokukhawuleza.
Ngakolunye uhlangothi, iivalve eziphezulu zokushisa zifuna izinto ezichasene ne-deformation-induced deformation, ezifana ne-chrome-molybdenum steel okanye i-Inconel. Ezi zinyithi zibonelela ngogcino lwamandla agqwesileyo kunye nokumelana nomhlwa kumaqondo obushushu aphakamileyo, apho ukukhwela ibhayisekile okushushu kunokukhokelela ekudinweni nasekuvuzeni.
IiTekhnoloji zokutywina: Ukuchaneka kubalulekile
Ukutywinwa okufanelekileyo kubalulekile ekusebenzeni kwevalvu nakweyiphi na iqondo lobushushu, kodwa iimeko ezingqongileyo ezigqithisileyo zizisa imingeni ekhethekileyo.
Iivalvu ze-Cryogenic zihlala zisebenzisa izixhobo ezithambileyo-ezifana ne-PTFE okanye ii-elastomers ezikhethekileyo ezihlala zibhetyebhetye kumaqondo obushushu aphantsi. La matywina kufuneka avumele ukucutheka kwaye anciphise iindlela ezivuzayo naxa ulwelo olunomkhenkce ludlula kwivalve.
Iivalve eziphezulu zokushisa, nangona kunjalo, zithembele ngakumbi kwi-metal-to-metal seating kunye ne-graphite-based packing materials ezixhathisa ukuthotywa kwiindawo ezishushu. Injongo kukuthintela ukuvuthela kunye nokuqinisekisa ukunyaniseka kokutywinwa nangona ukwanda kwe-thermal kunye noxinzelelo oluphezulu lwangaphakathi.
Ukuqinisekisa ukuthembeka kwexesha elide kwiiMeko eziPhezulu
Ukugcina uzinzo kunye nokhuseleko phantsi kweemeko zobushushu obugqithisileyo, iindlela ezimbalwa zobunjineli zibalulekile:
Imbuyekezo yeThermal: Iimpawu zoyilo ezifana neebhonethi ezandisiweyo, ukupakisha okulayishwe ngokuphila, kunye noyilo lwezihlalo eziguquguqukayo lunceda ukufunxa ukwanda okanye ukucutha kunye nokunciphisa uxinzelelo kumzimba wevalvu.
Uvavanyo olungqongqo: Iivaluvu kufuneka zivavanye ukusebenza kwe-cryogenic okanye ubushushu obuphezulu, kubandakanya ukufumanisa ukuvuza kwe-helium, ukulinganisa ukukhwela ibhayisekile eshushu, kunye novavanyo lokuvuza kwesitulo.
Ufakelo olululo kunye noLondolozo: Kwanezona zivalo ezinobunjineli zinokusilela ngaphandle kokuphathwa kakuhle. Abafaki kufuneka balandele izikhokelo zetorque, ezona ndlela zisebenzayo zokugquma, kwaye bacwangcise uhlolo rhoqo, ngakumbi kwiinkqubo zokukhwela ibhayisekile.
Khetha i-Smart kwiimeko ezinzima
Nokuba ulawula indawo yokugcina i-cryogenic okanye ukongamela isityalo samandla obushushu, iivalvu ozikhethayo zichaphazela ngokuthe ngqo ukhuseleko lwenkqubo kunye nokusebenza kakuhle. Ngokuqonda iimfuno ezithile zeevalve ze-cryogenic kunye ne-high-temperature valves, unokwenza ngcono izisombululo kwisicelo sakho kunye nokunciphisa umngcipheko wexesha elide.
Thatha iValveiivalvu ezihlala ixesha elide, ezenziwe ngobunjineli ezichanekileyo zommandla ogqithisileyo. Qhagamshelana nathi namhlanje ukuze ujonge izisombululo zethu kwaye uqinisekise ukuba inkqubo yakho isebenza ngokuthembekileyo-nokuba kushushu kangakanani na.
Ixesha lokuposa: Jul-01-2025