Kwinkqubo yokuhambisa ulwelo,Ivalvu yobushushu obuphezululicandelo lolawulo eliyimfuneko, elinomsebenzi omkhulu wokulawula, ukuphambukisa, ukuthintela ukubuya kwesantya, ukucima, kunye ne-shunt. Ivalvu isetyenziswa kakhulu kwiindawo zoshishino nezoluntu. Ivalvu yobushushu obuphezulu luhlobo olusetyenziswa rhoqo kwiivalvu. Iimpawu zayo ezithile zezi zilandelayo: ukusebenza kakuhle kokucima, ukucima okunzulu kunokwenziwa; ukuwelda okuhle; ukufunxwa kakuhle kwempembelelo, kunzima ukuyonakalisa ngogonyamelo; Ubuqhophololo bobushushu budla ngokuba ncinci njalo njalo. Kukho iintlobo ezininzi zeevalvu zobushushu obuphezulu. Ezixhaphakileyo zezobushushu obuphezulu.Iivalvu zebhabhathane, ubushushu obuphezuluIivalvu zebhola, izihluzi ezisebenzisa ubushushu obuphezulu, kunye nezisebenzisa ubushushu obuphezuluIivalvu zesango.
Ziziphi iintlobo zeevalvu zeevalvu zobushushu obuphezulu
Iivalvu ezishushu kakhulu ziquka iivalvu zesango ezishushu kakhulu, iivalvu zokuvala ezishushu kakhulu, iivalvu zokujonga ezishushu kakhulu, iivalvu zebhola ezishushu kakhulu, iivalvu zebhabhathane ezishushu kakhulu, iivalvu zeenaliti ezishushu kakhulu, iivalvu ze-throttle ezishushu kakhulu, kunye neevalvu zokunciphisa uxinzelelo ezishushu kakhulu. Phakathi kwazo, ezisetyenziswa kakhulu ziivalvu zesango, iivalvu zeglobe, iivalvu zokujonga, iivalvu zebhola kunye neevalvu zebhabhathane.
Zithini iimeko zokusebenza kweeValve zobushushu obuphezulu
Iimeko zokusebenza zobushushu obuphezulu ziquka ubushushu obungaphantsi kobushushu obuphezulu, ubushushu obuphezulu Ⅰ, ubushushu obuphezulu Ⅱ, ubushushu obuphezulu Ⅲ, ubushushu obuphezulu Ⅳ, kunye nobushushu obuphezulu Ⅴ, eziza kwaziswa ngokwahlukeneyo ngezantsi.
Ubushushu obuphantsi kobushushu obuphezulu
Ubushushu obuphantsi kobushushu buthetha ukuba ubushushu bokusebenza bevalvu bukwi-325 ～ 425 ℃. Ukuba i-medium ngamanzi nomphunga, i-WCB, i-WCC, i-A105, i-WC6 kunye ne-WC9 zisetyenziswa kakhulu. Ukuba i-medium yioyile equlethe isalfure, i-C5, i-CF8, i-CF3, i-CF8M, i-CF3M, njl., ezimelana nokugqwala kwe-sulfide, zisetyenziswa kakhulu. Zisetyenziswa kakhulu kwizixhobo zokunciphisa uxinzelelo kunye nezixhobo zokucola ezicothayo kwiindawo zokucola. Ngeli xesha, iivalvu ezenziwe nge-CF8, i-CF8M, i-CF3 kunye ne-CF3M azisetyenziselwa ukuxhathisa ukugqwala kwezisombululo ze-asidi, kodwa zisetyenziselwa iimveliso zeoyile eziqulethe isalfure kunye nemibhobho yeoyile negesi. Kule meko, ubushushu obuphezulu bokusebenza be-CF8, i-CF8M, i-CF3 kunye ne-CF3M yi-450 ° C.
Ubushushu obuphezulu Ⅰ
Xa ubushushu bokusebenza bevalvu buyi-425 ～ 550 ℃, yiklasi yobushushu obuphezulu I (ebizwa ngokuba yiklasi ye-PI). Izinto eziphambili zevalvu yeklasi ye-PI "yintsimbi eshushu ephezulu Ⅰ grade medium carbon chromium nickel rare earth titanium esemgangathweni ophezulu engatshisi ubushushu" ene-CF8 njengemilo esisiseko kwi-ASTMA351 standard. Ngenxa yokuba iklasi ye-PI ligama elikhethekileyo, ingcamango yentsimbi engatyiwayo yobushushu obuphezulu (P) ifakiwe apha. Ke ngoko, ukuba indawo yokusebenza ngamanzi okanye umphunga, nangona intsimbi yobushushu obuphezulu i-WC6 (t≤540 ℃) okanye i-WC9 (t≤570 ℃) nayo ingasetyenziswa, ngelixa iimveliso zeoyile ezinesulfure zingasetyenziswa nentsimbi yobushushu obuphezulu i-C5 (ZG1Cr5Mo), kodwa azinakuthiwa yi-PI-class apha.
Ubushushu obuphezulu II
Ubushushu bokusebenza bevalvu yi-550 ～ 650 ℃, kwaye ihlelwa njenge-Ⅱ yobushushu obuphezulu (ebizwa ngokuba yi-P Ⅱ). Ivalvu yobushushu obuphezulu yeklasi ye-PⅡ isetyenziswa kakhulu kwisixhobo sokuqhekeza i-oyile esinzima se-refinery. Iqulethe ivalvu yesango engagugiyo esetyenziswa kwi-nozzle ejikelezayo kathathu nakwezinye iindawo. Izinto eziphambili zevalvu yeklasi ye-PⅡ “yi-Ⅱ carbon medium chromium nickel rare earth titanium tantalum reinforced heat-resistant steel” ene-CF8 njengemilo esisiseko kwi-ASTMA351 standard.
Ubushushu obuphezulu III
Ubushushu bokusebenza bevalvu yi-650 ～ 730 ℃, kwaye ihlelwa njenge-high temperature III (ebizwa ngokuba yi-PⅢ). Iivalvu zobushushu obuphezulu zeklasi ye-PⅢ zisetyenziswa kakhulu kwiiyunithi ezinkulu ze-oyile enzima eziqhekezayo kwiindawo zokucocisa. Izinto eziphambili zevalvu yobushushu obuphezulu yeklasi ye-PⅢ yi-CF8M esekwe kwi-ASTMA351.
Ubushushu obuphezulu Ⅳ
Ubushushu bokusebenza bevalvu yi-730 ～ 816 ℃, kwaye ilinganiswa njengobushushu obuphezulu IV (ebizwa ngokuba yi-PIV ngamafutshane). Umda ophezulu wobushushu bokusebenza bevalvu ye-PIV yi-816 ℃, kuba ubushushu obuphezulu obubonelelwa yi-ASMEB16134 pressure-temperature grade ekhethiweyo kuyilo lwevalvu yi-816 ℃ (1500υ). Ukongeza, emva kokuba ubushushu bokusebenza budlule kwi-816 ° C, intsimbi isondele ekungeneni kummandla wobushushu bokubumba. Ngeli xesha, intsimbi ikwindawo yokuguqulwa kweplastiki, kwaye intsimbi ineplastiki elungileyo, kwaye kunzima ukumelana noxinzelelo oluphezulu lokusebenza kunye namandla okuchaphazeleka kwaye ingayiguquguquki. Izinto eziphambili zevalvu ye-P Ⅳ yi-CF8M kwi-ASTMA351 standard njengemilo esisiseko "ubushushu obuphezulu Ⅳ medium carbon chromium nickel molybdenum rare earth titanium tantalum reinforced heat-resistant steel". I-CK-20 kunye ne-ASTMA182 standard F310 (kubandakanya umxholo we-C ≥01050%) kunye nentsimbi engagqwaliyo engatshiyo ye-F310H.
Ubushushu obuphezulu Ⅴ
Ubushushu bokusebenza kwevalvu bungaphezulu kwe-816 ℃, obubizwa ngokuba yi-PⅤ, ivalvu yobushushu obuphezulu ye-PⅤ (yeevalvu ezivaliweyo, ezingalawuli iivalvu zebhabhathane) kufuneka isebenzise iindlela zoyilo ezikhethekileyo, ezifana ne-lining insulation lining okanye amanzi okanye igesi. Ukupholisa kunokuqinisekisa ukusebenza okuqhelekileyo kwevalvu. Ke ngoko, umda ophezulu wobushushu bokusebenza kwevalvu yobushushu obuphezulu yeklasi ye-PⅤ awuchazwanga, kuba ubushushu bokusebenza kwevalvu yokulawula abumiselwanga kuphela zizinto, kodwa ngeendlela zoyilo ezikhethekileyo, kwaye umgaqo osisiseko wendlela yoyilo uyafana. Ivalvu yobushushu obuphezulu yeklasi ye-PⅤ inokukhetha izixhobo ezifanelekileyo ezinokuhlangabezana nevalvu ngokwendlela yayo yokusebenza kunye noxinzelelo lokusebenza kunye neendlela zoyilo ezikhethekileyo. Kwivalvu yobushushu obuphezulu yeklasi ye-PⅤ, ngokuqhelekileyo ivalvu yeflapper okanye ibhabhathane yevalvu yeflapper okanye ivalvu yebhabhathane idla ngokukhethwa kwi-HK-30 kunye ne-HK-40 alloys ephezulu yobushushu kwi-ASTMA297 standard. Iyamelana nokugqwala, kodwa ayikwazi ukumelana noxinzelelo kunye nemithwalo yoxinzelelo oluphezulu.
Ixesha lokuthumela: Juni-21-2021