Iqhaza Lama-Antioxidants Ekuthuthukiseni Isikhathi Sokuphila Sezintambo Ezihlanganisiwe Ze-Cross-Linked Polyethylene (XLPE)
I-polyethylene ehlanganisiwe (XLPE)into yokuqala evikelayo esetshenziswa kumakhebuli aphakathi nendawo nanamandla kagesi aphezulu. Kuyo yonke impilo yazo yokusebenza, la makhebuli ahlangabezana nezinselele ezihlukahlukene, okuhlanganisa izimo zezulu ezihlukahlukayo, ukushintshashintsha kwezinga lokushisa, ukucindezeleka komshini, nokusebenzisana kwamakhemikhali. Lezi zici zihlangene zithonya ukuqina nokuphila isikhathi eside kwezintambo.
Ukubaluleka kwama-Antioxidants kuma-XLPE Systems
Ukuqinisekisa impilo yesevisi eyandisiwe yezintambo ze-XLPE-insulated, ukukhetha i-antioxidant efanelekile yohlelo lwe-polyethylene kubalulekile. Ama-Antioxidants adlala indima ebalulekile ekuvikeleni i-polyethylene ekuwohlokeni kwe-oxidative. Ngokusabela ngokushesha ngama-radicals wamahhala akhiqizwa ngaphakathi kwempahla, ama-antioxidants akha amakhompiyutha azinzile, njengama-hydroperoxides. Lokhu kubaluleke kakhulu ngoba izinqubo eziningi zokuxhumanisa i-XLPE zisekelwe kwi-peroxide.
Inqubo Yokwehliswa Kwezimboni
Ngokuhamba kwesikhathi, ama-polymers amaningi kancane kancane aba brittle ngenxa yokuwohloka okuqhubekayo. Ukuphela kwempilo yama-polymers ngokuvamile kuchazwa njengendawo lapho ubude bawo bekhefu behla bufike ku-50% yenani lokuqala. Ngalé kwalo mngcele, ngisho nokugoba okuncane kwentambo kungaholela ekuqhekekeni nasekuhlulekeni. Izindinganiso zamazwe ngamazwe zivame ukusebenzisa lo mbandela we-polyolefin, okuhlanganisa i-polyolefin exhunywe ngokuphambene, ukuze kuhlolwe ukusebenza kwempahla.
I-Arrhenius Model ye-Cable Life Prediction
Ubudlelwano phakathi kwezinga lokushisa nesikhathi sekhebuli buvame ukuchazwa kusetshenziswa i-equation ye-Arrhenius. Le modeli yezibalo iveza izinga lokusabela kwamakhemikhali njengalokhu:
K= D e(-Ea/RT)
Kuphi:
K: Izinga lokusabela elithile
D: Njalo
I-Ea: Amandla okuqalisa
R: I-Boltzmann gas constant ( 8.617 x 10-5 eV/K)
T: Izinga lokushisa eliphelele e-Kelvin (273+ Temp in °C)
Ihlelwe kabusha ngokwe-algebra, isibalo singavezwa njengefomu lomugqa: y = mx+b
Kusukela kulesi sibalo, amandla okwenza kusebenze (i-Ea) angatholwa kusetshenziswa idatha yesithombe, okuvumela ukuqagela okunembayo kwempilo yekhebula ngaphansi kwezimo ezihlukahlukene.
Ukuhlola Ukuguga Okusheshisiwe
Ukuze kutholwe ubude besikhathi bempilo yamakhebuli afakwe i-XLPE-insulated, ama-specimens okuhlola kufanele afakwe ekuhlolweni okusheshisiwe kokuguga okungenani okungenani kwamazinga okushisa amathathu (okungcono amane) ahlukene. Lawa mazinga okushisa kufanele adlule ibanga elanele ukuze kusungulwe ubudlelwano bomugqa phakathi kwesikhathi kuya kokwehluleka nezinga lokushisa. Ngokuphawulekayo, izinga lokushisa eliphansi lokuchayeka kufanele liphumele esikhathini esimaphakathi sokuya ekupheleni okungenani samahora angu-5,000 ukuze kuqinisekiswe ukufaneleka kwedatha yokuhlola.
Ngokusebenzisa le ndlela eqinile nokukhetha ama-antioxidant asebenza kahle kakhulu, ukuthembeka kokusebenza nokuhlala isikhathi eside kwamakhebula afakwe i-XLPE-insulated kungathuthukiswa kakhulu.
Isikhathi sokuthumela: Jan-23-2025