Indima Yama-Antioxidants Ekuthuthukiseni Isikhathi Sokuphila Sezintambo Ezihlanganisiwe Ze-Polyethylene (XLPE) Insulated
I-polyethylene exhumene ne-cross-linked (XLPE)kuyinto eyinhloko yokuvikela esetshenziswa ezintanjeni ezimaphakathi neziphezulu. Kuyo yonke impilo yazo yokusebenza, lezi zintambo zibhekana nezinselele ezahlukahlukene, okuhlanganisa izimo zezulu ezahlukahlukene, ukushintshashintsha kwezinga lokushisa, ukucindezeleka komshini, kanye nokusebenzisana kwamakhemikhali. Lezi zici zithinta ndawonye ukuqina nobude bezintambo.
Ukubaluleka kwama-Antioxidants ezinhlelweni ze-XLPE
Ukuqinisekisa impilo yesevisi ende yezintambo ezifakwe i-XLPE, ukukhetha i-antioxidant efanele yesistimu ye-polyethylene kubalulekile. Ama-antioxidants adlala indima ebalulekile ekuvikeleni i-polyethylene ekuwohlokeni kwe-oxidative. Ngokusabela ngokushesha ngama-free radicals akhiqizwa ngaphakathi kwezinto, ama-antioxidants akha ama-compounds azinzile, njenge-hydroperoxides. Lokhu kubaluleke kakhulu ngoba izinqubo eziningi zokuxhumanisa i-XLPE zisekelwe ku-peroxide.
Inqubo Yokuwohloka Kwama-Polymers
Ngokuhamba kwesikhathi, ama-polymer amaningi aba buthakathaka kancane kancane ngenxa yokuwohloka okuqhubekayo. Ukuphela kokuphila kwama-polymer kuvame ukuchazwa njengendawo lapho ukunwebeka kwawo lapho kuphuka kwehla khona ku-50% wenani lokuqala. Ngale kwalesi silinganiso, ngisho nokugoba okuncane kwekhebula kungaholela ekuqhekekeni nasekuhlulekeni. Izindinganiso zomhlaba wonke zivame ukusebenzisa lesi simiso sama-polyolefin, kufaka phakathi ama-polyolefin axhumene, ukuze kuhlolwe ukusebenza kwezinto.
Imodeli ye-Arrhenius yokubikezela impilo yekhebula
Ubudlelwano phakathi kwezinga lokushisa kanye nesikhathi sokuphila kwekhebula buvame ukuchazwa kusetshenziswa i-Arrhenius equation. Le modeli yezibalo iveza izinga lokusabela kwamakhemikhali kanje:
K= D e(-Ea/RT)
Kuphi:
K: Izinga lokusabela elithile
D: Okuhlala njalo
Ea: Amandla okusebenza
R: I-Boltzmann gas constant (8.617 x 10-5 eV/K)
T: Izinga lokushisa eliphelele ku-Kelvin (273+ Izinga lokushisa ku-°C)
Uma ihlelwe kabusha ngokwe-algebra, i-equation ingachazwa njengefomu eliqondile: y = mx+b
Kusukela kulesi sibalo, amandla okusebenza (i-Ea) angatholakala kusetshenziswa idatha yesithombe, okuvumela ukubikezela okunembile kokuphila kwekhebula ngaphansi kwezimo ezahlukahlukene.
Ukuhlolwa Kokuguga Okusheshayo
Ukuze kutholakale isikhathi sokuphila kwamakhebula afakwe i-XLPE, amasampula okuhlola kufanele ahlolwe ngokushesha ngokuguga okungenani amazinga okushisa amathathu ahlukene (mhlawumbe amane). Lawa mazinga okushisa kumele ahlanganise ububanzi obanele ukuze kusungulwe ubudlelwano obuqondile phakathi kwesikhathi nokwehluleka kanye nezinga lokushisa. Okuphawulekayo ukuthi izinga lokushisa eliphansi kakhulu lokuvezwa kufanele liholele ephuzwini eliphakathi nesikhathi nokuphela okungenani amahora angu-5,000 ukuqinisekisa ukusebenza kahle kwedatha yokuhlolwa.
Ngokusebenzisa le ndlela eqinile nokukhetha ama-antioxidants asebenza kahle, ukuthembeka kokusebenza kanye nobude besikhathi sezintambo ezifakwe i-XLPE kungathuthukiswa kakhulu.
Isikhathi sokuthunyelwe: Jan-23-2025