Cov qauv ntawm lub cab zoo li yooj yim, qhov tseeb, txhua lub hom phiaj tseem ceeb, yog li txhua yam khoom siv uas yuav tsum tau ua kom muaj kev ntseeg tau ntawm cov ntaub ntawv no thaum lub sijhawm ua haujlwm.
1. Cov khoom siv saib xyuas
Keeb kwm, cov ntaub ntawv siv rau cov hluav taws xob hluav taws xob puas tau tus neeg tooj liab thiab txhuas. Sodium kuj tau sim luv luv. Tooj liab thiab txhuas muaj qhov zoo dua hluav taws xob, thiab tus nqi ntawm tooj liab yog tsawg dua thaum xa rov qab ntawm tus thawj coj tooj liab yog me dua li ntawm tus thawj coj txhuas. Tus nqi ntawm txhuas yog qis dua tooj liab. Tsis tas li ntawd, vim hais tias qhov ntom ntawm tooj liab loj dua li ntawm txhuas, tab sis txhuas cov neeg kos npe yog tseem sib dua dua li tooj liab ua tus thawj cable.
2. Rwb thaiv cov ntaub ntawv
Muaj ntau cov ntaub ntawv insulating uas MV lub zog hluav taws xob tuaj yeem siv tau, txawm tias suav nrog cov ntaub ntawv rwb thaiv tsev, uas tau ua tiav tau siv ntau dua 100 xyoo. Niaj hnub no, extruded polymer rwb thaiv tsev tau raug lees txais. Extruded polymer rwb thaiv tsev cov ntaub ntawv suav nrog pe (LDPE thiab HDPE), xlpe, WTR-XLPE thiab EPR. Cov ntaub ntawv no yog thermoplastic li zoo li thermosetting. Thermoplastic cov ntaub ntawv deform thaum rhuab, thaum thermoset cov ntaub ntawv khaws lawv cov duab thaum ua haujlwm kub.
2.1. Rwb thaiv tsev ntawv
Thaum pib ntawm lawv kev ua haujlwm, ntawv-insulated cables nqa tsuas yog lub nra me me thiab yog cov tswj tau zoo. Txawm li cas los xij, cov neeg siv hluav taws xob txuas ntxiv ua kom cov cable nqa ntau thiab ntau qhov kev kawm zoo tsis tuaj yeem sawv cev rau kev ua haujlwm yav tom ntej ntawm lub cable yuav tsum yog qhov zoo. Nyob rau hauv xyoo tsis ntev los no, cov ntawv insulated colesulated tau tsis tshua siv.
2.2.Pvc
PVC tseem siv los ua cov khoom siv insulating rau cov khoom siv hluav taws xob tsawg 1kv cables thiab kuj yog cov khoom siv sheathing. Txawm li cas los xij, daim ntawv thov PVC rau hauv cable rwb thaiv tsev yog sai dua los ntawm XLPE, thiab kev kub siab (HDPE)
2.3. Polyethylene (PE)
Tsawg qis ntom ntom polyethylene (ldpe) tau tsim nyob rau xyoo 1930s thiab tam sim no siv los ua tus ntoo khaubligined polyethylinked polyethylene (WTR-XLPE). Hauv lub thermoplastic lub xeev, qhov kev ua haujlwm siab tshaj plaws yog 75 ° C, uas yog qis dua li kev ua haujlwm ntawm daim ntawv insulated clesulated cleshulated cleshulated cleshulated cleshulated cleshulated cleshulated cleshulated cleshulated cleshulated cables (80 ~ 90 ° C). Qhov teeb meem no tau daws nrog kev tawm tsam ntawm cross-txuas Polyethylene (XLPE), uas tuaj yeem sib ntsib lossis tshaj qhov kev pabcuam ntawm cov ntawv hluav taws xob.
2.4.Hla-Txuas Polyethylene (XLPE)
XLPE yog cov khoom siv thickosetting ua los ntawm kev sib xyaw cov polyethylinkene (LDPE) nrog cov neeg sawv cev hla (xws li peroxide).
Qhov siab tshaj plaws ntawm tus neeg saib xyuas kub ntawm XLPE insulated cable yog txog li ntawm 140 ° C. thiab siv tau rau hauv 9000V rau 500kV.
2.5. Dej Resistant tsob ntoo hla-txuas Polyethylene (WTR-XLPE)
Cov ntoo ntoo txwj dej yuav txo tau cov kev pabcuam lub neej ntawm XLPE Cable. Muaj ntau txoj hauv kev los txo cov txheej txheem dej kev loj hlob, tab sis ib qho ntawm cov khoom siv dej ua haujlwm tshwj xeeb, hu ua cov kab ke ntawm WTR-XLPE.
2.6. Ethylene Propylene Roj Hmab (EPR)
EPR yog cov khoom siv thickosetting ua los ntawm ethylene (qee zaum ib tug monomer ntawm peb tus monomer yog hu ua ethylene diene cov roj hmab (EPDM). Tshaj li ntau qhov dav kub ntau, epr ib txwm tseem mos thiab muaj cov corona zoo. Txawm li cas los xij, cov ditricectric kev tshem ntawm EPR cov khoom muaj ntau dua li ntawm XLPE thiab WTR-XLPE.
3. Rwb thaiv tsev cov txheej txheem vulcanization
Tus txheej txheem ntoo khaub lig yog tshwj xeeb rau cov polymer siv. Cov tsim ntawm crosslinked polymers pib nrog matrix polymer thiab tom qab ntawd stabilizers thiab crosslinkers tau ntxiv los ua kev sib xyaw. Cov txheej txheem hla kev ntxiv cov ntsiab lus sib txuas ntxiv rau cov qauv molecular. Thaum txuas nrog, Polymer molecular saw tseem ywj, tab sis tsis tuaj yeem ua kom tiav rau hauv cov kua yaj.
4. Cov ntaub ntawv tiv thaiv thiab insulating ntaub thaiv npog
Cov ntaub thaiv npog ib nrab txheej yog extruded ntawm sab nraud ntawm tus neeg saib xyuas hluav taws xob thiab muaj hluav taws xob teb hauv cov cable insulated core. Cov ntaub ntawv no muaj cov khoom siv roj carbon dub
Lub Sijhawm Post: Apr-12-2024