Iqhaza lama-antioxidants ekuthuthukiseni isikhathi sokuphila kwe-polyethylene (XLPE) izintambo ezifakiwe
I-polyethylene exhumene nesiphambano (i-XLPE)Ingabe impahla eyinhloko esetshenziselwa izintambo eziphakathi nendawo eziphakeme zamandla aphezulu. Kuyo yonke impilo yabo yokusebenza, lezi zintambo zihlangana nezinselelo ezihlukile, kufaka phakathi izimo zezulu ezahlukahlukene, ukuguquguquka kwezinga lokushisa, ukucindezela kwengcindezi yemishini, kanye nokusebenzisana kwamakhemikhali. Lezi zinto zihlale zithonya ukuqina nokuphila isikhathi eside kwezintambo.
Ukubaluleka kwama-antioxidants ezinhlelweni ze-XLPE
Ukuqinisekisa impilo yenkonzo eyengeziwe yezintambo ze-XLPE-Insurated, ukhetha i-antioxidant efanelekile yohlelo lwe-polyethylene lubalulekile. Ama-antioxidants adlala indima ebaluleke kakhulu ekuvikeleni i-polyethylene ngokumelene nokuwohloka kwe-oxidative. Ngokuphendula ngokushesha ngama-radicals wamahhala akhiqizwe ngaphakathi kwezinto ezibonakalayo, ama-antioxidants enza ama-compys aqinile, anjenge-hydroperooxides. Lokhu kubaluleke kakhulu ngoba izinqubo zokuxhumanisa kakhulu ze-XLPE zisuselwa ku-peroxide-kususelwa.
Inqubo yokucekelwa phansi yama-polymers
Ngokuhamba kwesikhathi, ama-polymers amaningi aqala kancane ngenxa yokonakaliswa okuqhubekayo. Ukuphela kokuphila kwama-polymers kuvame ukuchazwa njengephuzu lapho ukugcwala kwalo kwekhefu kuncipha ku-50% yenani lokuqala. Ngaphandle kwalomkhawulo, ngisho nokugoba okuncane kwentambo kungaholela ekuqhekekeni nasekuhluleni. Amazinga aphesheya ajwayele ukwamukela lesi simiso se-polyolefins, kufaka phakathi ama-polyolefins axhumeke kakhulu, ukuhlola ukusebenza okubonakalayo.
Imodeli ye-Arrhenius yokubikezela kwempilo yekhebula
Ubudlelwano phakathi kokushisa kanye ne-cable lifespan kuvame ukuchazwa kusetshenziswa i-arrhenius equation. Le modeli yezibalo iveza isilinganiso sokusabela kwamakhemikhali njengoba:
K = D e (-EA / rt)
Lapho:
K: Izinga elithile lokuphendula
D: njalo
I-EA: I-activation Energy
R: I-Boltzmann Gers Stant (8.617 x 10-5 EV / K)
I-T: Ukushisa okuphelele eKelvin (273+ Temp ku-° C)
Uhlelwe kabusha kahle, i-equation ingavezwa njengefomu eliqondile: y = mx + b
Ukusuka kule equation, amandla e-activation amandla (EA) angathathwa kusetshenziswa idatha yokuqhafaza, okwenza ukuba kube nokubikezela okuqondile kwempilo yekhebula ngaphansi kwezimo ezahlukahlukene.
Ukuhlolwa kokuguga okusheshayo
Ukunquma isikhathi sokuphila kwezintambo ze-XLPE, izinhlobo zokuhlola kufanele zibhekwe ekuhlolweni okusheshayo kokuguga okungenani kwamazinga okushisa ahlukene amathathu. Lawa mazinga okushisa kufanele abeke ibanga elanele ukuze asungule ubudlelwano obuqondile phakathi kwesikhathi sokuhluleka kanye nokushisa. Ngokuphawulekile, izinga lokushisa eliphansi kakhulu kufanele liholele ekutheni libe nesikhathi sokuphela kokuphela kwamahora angama-5,000 ukuqinisekisa ubuqiniso bemininingwane yokuhlola.
Ngokusebenzisa le ndlela enzima nokukhetha ama-antioxidants aphezulu asebenza kakhulu, ukuthembeka okusebenzayo kanye nokuphila isikhathi eside kwezintambo ze-XLPE-Insured kungathuthukiswa kakhulu.
Isikhathi Seposi: Jan-23-2025