Lub pre-stranded hlau yog siv rau kev sib txuas fittings ntawm overhead hwj chim conductor thiab lub hwj chim overhead cable davhlau ya nyob twg, ncua kev kawm ntawv thiab sib koom ua ke. Cov xaim xaim ua ntej tau tshwm sim thawj zaug hauv Tebchaws Meskas hauv xyoo 1940 thiab 1950s. Cov khoom qub yog kauv hlau tiv thaiv rau qhov kev ntxhov siab ntawm txoj hauj lwm ntawm liab qab hlau thiab txoj hauj lwm ntawm hluav taws xob corrosion thiab arc hlawv. Tom qab xyoo ntawm txoj kev loj hlob, pre-twisted hlau fittings tau dav siv nyob rau hauv lub hwj chim kis tau tus mob thiab tis, optical fiber kev sib txuas lus, electrified railway, cable TV, kev tsim kho, kev ua liaj ua teb thiab lwm yam liaj teb.
Hlau core aluminium hlau yog dav siv nyob rau hauv 10 kV tis network ntawm lub ntsiab xaim, nws muaj cov txiaj ntsig zoo ntawm lub zog tensile siab, kev tiv thaiv hluav taws xob zoo, tus nqi qis, yog dav siv nyob rau hauv cov cheeb tsam ntawm kev sib txuas hauv nroog thiab cov kab hluav taws xob nyob deb nroog. . Txawm li cas los xij, ib zaug steel core aluminium conductor kab raug puas los ntawm kev quab yuam sab nraud lossis huab cua tsis zoo, nws yooj yim kom muaj qhov yuam kev luv luv. Thaum qhov sib xyaw luv luv tshwm sim, cov hlau yuav tawg. Thaum muaj qhov xwm txheej zoo li no, kev kho cov hlau tsim nyog yuav tsum tau muab rau lub sijhawm kom tsis txhob muaj qhov txuas ntxiv ntawm cov xoob xoob ua rau txo qis ntawm cov khoom siv hluav taws xob thiab hluav taws xob ntawm cov hlau.
Prestranded hlau yog ib yam khoom ntawm ib tug xov tooj ntawm ib leeg-strand kauv hlau prestranded. Raws li tus ntoo khaub lig qhov loj ntawm cov hlau, lub helix hlau nrog cov txheej txheem sab hauv txoj kab uas hla yog rotated raws helix kev taw qhia los ua ib tug tubular kab noj hniav. Lub pre-stranded hlau yog muab kauv qhwv nyob rau hauv txheej txheej ntawm cov hlau. Nyob rau hauv qhov kev txiav txim ntawm cov hlau nro, cov kauv rotates los tsim cov anchorage quab yuam ntawm cov hlau. Qhov loj dua cov hlau nro yog, qhov nruj dua cov kauv yog thiab ntau dua lub zog tuav yog. Kev kho yav dhau los prestranded hlau yog dav siv nyob rau hauv 35 kV thiab saum toj no kab, tab sis nws yog tsawg siv nyob rau hauv 10 kV kab, thiab tsuas yog siv tau nyob rau hauv cov kab segment nrog 7% los yog tsawg dua strand thiab qhov kev puas tsuaj ntau yam tsis loj, thiab tsis tuaj yeem ncav cuag qhov kev txhawb zog. Tension pretwisted hlau txuas bar yog ib yam tshiab ntawm pretwisted hlau khoom nyob rau hauv xyoo tas los. Nws yog siv los ua ib hom kev sib txuas. Nws tuaj yeem siv los hloov cov pa clamp siab txuas cov yeeb nkab thiab cov yeeb nkab siab, tuaj yeem siv los txuas cov hlau txuas hlau, aluminium alloy stranded hlau, steel tub ntxhais aluminium stranded hlau thiab lwm yam xov hlau, kom ua tiav nws cov khoom qub zog thiab hluav taws xob ua haujlwm.
Post lub sij hawm: Dec-07-2022