Okokuqala, iyini ivalvu yokuphepha
I-valve yokuphepha efrijini uhlobo lwe-valve esetshenziselwa ukuvikela imishini yokuqandisa kanye nokuphepha kohlelo, ingeye-valve yokukhulula ingcindezi ezenzakalelayo. I-valve yokuphepha ivame ukwakhiwa umzimba we-valve, isembozo se-valve, intwasahlobo, i-spool kanye neziqondiso. Izingxenye zayo zokuvula nokuvala zisesimweni esivame ukuvalwa, lapho ingcindezi ye-medium ohlelweni lwemishini yokuqandisa idlula inani lokuphepha elibekiwe izovulwa ngokuzenzakalelayo, ngokukhipha inani elithile loketshezi ngaphandle kohlelo, ukuze kuvinjelwe ukuthi ipayipi noma imishini ingcindezi ephakathi idlula inani elibekiwe. I-valve yokuphepha ohlelweni lokuqandisa izodlala indima yokuvikela ukuphepha.
Okwesibili, kungani kufanele ufake ama-valve okuphepha
Amavalvu okuphepha asetshenziswa kakhulu ukuvikela imishini yokuqandisa kanye nemikhumbi yokucindezela (njengezitsha zokugcina uketshezi, ama-condenser), njll. emonakalweni obangelwa ukucindezela ngokweqile. Nazi izizathu eziningana zokuthi kungani amavalvu okuphepha kudingeka afakwe:
1. ukuvimbela ukuqhekeka kwemishini: lapho ingcindezi engaphakathi kwemishini yokuqandisa noma isitsha sokucindezela idlula inani lokucindezela elibekwe yivalvu yokuphepha, ivalvu yokuphepha izovuleka ngokuzenzakalelayo ukuze ikhiphe uketshezi oluthile ukuze kugwenywe ukuqhekeka kwemishini noma isitsha.
2. Ukuvikela ukuphepha kwabasebenzi: Ukucindezela okukhulu kungaholela ekuqhumeni noma ekuvuzeni imishini, okubangela ukulimala komqhubi. Ukufakwa kwamavalvu okuphepha kunganciphisa ukucindezela ngesikhathi ukuze kuvikelwe ukuphepha kwabasebenzi.
3. Ukugwema ukwehluleka kohlelo: Ukucindezela okukhulu kungabangela umonakalo ohlelweni lokuqandisa, njengokuqhekeka kwamapayipi, umonakalo wemishini, njll. Ukufakwa kwamavalvu okuphepha kungagwema lokhu kwehluleka. Ukufakwa kwevalvu yokuphepha kungagwema lokhu kwehluleka futhi kwandise impilo yesistimu.
4. Hlangana nezidingo zomthetho: Ngokwemithethonqubo nezindinganiso ezifanele, eminye imishini yokuqandisa kanye nemikhumbi yokucindezela kumele ifakwe nama-valve okuphepha ukuqinisekisa ukuhambisana nezidingo zokuphepha.
Okwesithathu, izici zokukhetha ivalvu yokuphepha okufanele zicatshangelwe
Ekukhetheni ama-valve okuphepha, izici ezilandelayo zidinga ukucatshangelwa:
1. Uhlobo lwemishini kanye nezimo zokusebenza: ngokuya ngohlobo oluthile lwemishini yokuqandisa kanye nezimo zokusebenza, khetha ivalvu yokuphepha efanele. Isibonelo, izidingo ezahlukene zokuqandisa, izinga lokushisa lokusebenza kanye nengcindezi zizothinta ukukhethwa kwamavalvu okuphepha.
2. Izidingo zokugeleza: ngokwezidingo zokugeleza kohlelo, khetha ivalvu yokuphepha efanele. Izinga lokugeleza eliphezulu kanye nezinga eliphansi lokugeleza kohlelo kudingeka kucatshangelwe ukuqinisekisa ukuthi ivalvu yokuphepha ingahlangabezana nezidingo zohlelo.
3. ububanzi bokucindezela kwevalvu yokuphepha: ngokuya ngobubanzi bokucindezela kokusebenza kohlelo, khetha ivalvu yokuphepha efanele. Ukucindezela okusethiwe kwevalvu yokuphepha kufanele kube phezulu kancane kunokucindezela okuphezulu kokusebenza kohlelo ukuqinisekisa ukuthi ingavulwa ngesikhathi lapho uhlelo lufinyelela ukucindezela okuphezulu.
4. Izinto zevalvu yokuphepha kanye nokumelana nokugqwala: ngokuya ngohlobo lwento esetshenziswayo kanye nokugqwala, khetha izinto zevalvu yokuphepha ezifanele. Izinto ezahlukene zingaba nomthelela wokugqwala kuvalvu yokuphepha, ngakho-ke udinga ukukhetha izinto ezingamelani nokugqwala.
5. isitifiketi se-valve yokuphepha kanye nezindinganiso zokuthobela imithetho: khetha i-valve yokuphepha enesitifiketi kanye nokuhambisana nezindinganiso ezifanele ukuqinisekisa ikhwalithi yayo kanye nokusebenza kwayo okuthembekile.
6. Ukucatshangelwa kwezinye izici: ngokwezidingo ezithile, cabanga ngokulungiswa kwevalvu yokuphepha, izindlela zokufaka, izidingo zokugcinwa nokulungiswa.
Isikhathi sokuthunyelwe: Agasti-21-2023
