Tau ntau xyoo, kev sib tham txog kev txhim kho kev ua tau zoo thiab kev siv ntau yam ntawm tooj liab-clad aluminium cables yeej tsis tau cuam tshuam, thiab vim li cas vim li cas tooj liab-clad aluminium cables tau txhawj xeeb heev los ntawm kev lag luam yog ib txwm cuam tshuam nrog tus nqi siab ntawm cov khoom siv raw. - tooj liab;Ntawm qhov tod tes, nce kev tshawb fawb thiab kev tsim kho thiab kev txhim kho ntawm tooj liab-clad aluminium cables kuj tuaj yeem txhawb txoj kev loj hlob ntawm Tuam Tshoj txoj kev lag luam hlau thiab cable hauv ib qho kev txiav txim siab, thiab nws yog ib qho tseem ceeb ntawm kev lag luam.Yog li ntawd, txawm hais tias kev coj ua ntawm tooj liab-clad aluminium cables tau ntau xyoo, txog rau hnub no, txawm tias thaum lub aluminium alloy cable yog dav do-kib, kev sib tham ntawm tooj liab-clad aluminium cables tau txuas ntxiv.
Lub cable tau muab faib raws li qhov sib txawv ntawm cov khoom siv sab hauv, muaj ob yam tseem ceeb, ib qho yog cov khoom siv tooj liab ntshiab, thiab lwm yam yog tooj liab-clad aluminium khoom.Lo lus Askiv rau tooj liab-clad Aluminium yog: Copper Clad Aluminium, yog li tooj liab-clad aluminium conductors feem ntau hu ua: CCA conductors.Copper-clad aluminium composite wire yog thawj zaug los ntawm lub teb chaws Yelemees hauv xyoo 1930s, thiab tom qab ntawd tau tshaj tawm hauv tebchaws United Kingdom, Tebchaws Meskas, Fabkis thiab lwm lub tebchaws, thiab tau siv dav hauv ntau yam haujlwm.CATV cable hauv Tebchaws Meskas tau pib sim tooj liab-clad txhuas hlau thaum ntxov li xyoo 1968, thiab cov nyiaj tau txais mus txog 30,000 tons / xyoo.Tam sim no cov teb chaws hauv Asmeskas tau hloov cov tooj liab ntshiab nrog tooj liab-clad aluminium (steel) cables.Nyob rau hauv xyoo tas los no, Tuam Tshoj tus tooj liab-clad txhuas CATV cable kuj tau pib siv dav.Xyoo 2000, lub xeev tau tsim cov qauv kev lag luam -SJ / T11223-2000, thiab txhawb nqa kev siv tooj liab-clad aluminium cables.Tam sim no, cable TV chaw nres tsheb hauv Shanghai, Guangzhou, Zhejiang, Liaoning thiab lwm qhov chaw feem ntau tau siv tooj liab-clad aluminium cables, thiab cov lus teb zoo.
Copper-clad aluminium yog concentrically coated tooj liab txheej rau ntawm qhov chaw ntawm txhuas los yog txhuas / hlau alloy core khoom, uas yog tsim los ntawm kev kos duab, thiab lub thickness ntawm cov tooj liab txheej yog siab tshaj 0.55mm.Vim yog cov yam ntxwv ntawm daim tawv nqaij ntawm cov teeb liab ntau zaus kis tau tus mob ntawm tus neeg xyuas pib, cable TV teeb liab tau xa mus rau saum npoo ntawm txheej tooj liab saum toj no 0.008mm, thiab tooj liab clad aluminium inner conductor tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov teeb liab, thiab cov teeb liab kis tau tus yam ntxwv zoo ib yam nrog lub cev tooj liab ntawm tib txoj kab uas hla.
Yog li dab tsi yog qhov txawv ntawm tooj liab-clad aluminium cables thiab ntshiab tooj liab cables nyob rau hauv cov nqe lus ntawm kev ua tau zoo, dab tsi yog qhov zoo thiab dab tsi yog qhov shortcomings?Ua ntej ntawm tag nrho cov, nyob rau hauv cov nqe lus ntawm mechanical zog, lub zog thiab elongation ntawm ntshiab tooj liab conductors yog loj dua li ntawm tooj liab-clad aluminium conductors, uas txhais tau hais tias cov ntshiab tooj liab zoo dua tooj liab-clad txhuas nyob rau hauv cov nqe lus ntawm txhua yam khoom.Los ntawm qhov pom ntawm kev tsim cable, qhov zoo ntawm cov khoom siv zoo ntawm cov khoom siv tooj liab ntshiab dua li tooj liab clad aluminium conductors tsis tas yuav tsum tau siv rau hauv kev siv tswv yim.Copper-clad aluminium conductor yog sib zog dua li tooj liab ntshiab, yog li tag nrho qhov hnyav ntawm tooj liab-clad aluminium cable yog sib dua li ntshiab tooj liab conductor cable, uas yuav ua rau kom yooj yim rau kev thauj mus los ntawm cable thiab erection thiab kev tsim kho ntawm lub cable.Tsis tas li ntawd, tooj liab-clad aluminium yog me ntsis softer dua li tooj liab ntshiab, thiab cables ua nrog tooj liab-clad aluminium conductors yog zoo dua li ntshiab tooj liab cables nyob rau hauv cov nqe lus ntawm softness.
Qhov thib ob, nyob rau hauv cov nqe lus ntawm hluav taws xob kev ua tau zoo, vim hais tias cov conductivity ntawm txhuas yog phem dua li tooj liab, DC tsis kam ntawm tooj liab-clad aluminium conductor yog loj dua li ntawm cov ntshiab tooj liab conductor.Txawm hais tias qhov no muaj kev cuam tshuam feem ntau yog nyob ntawm seb lub cable puas yuav siv rau lub zog, xws li muab lub zog rau lub tshuab hluav taws xob, yog tias nws siv rau cov khoom siv hluav taws xob, cov tooj liab-clad aluminium conductor yuav ua rau kev siv hluav taws xob ntxiv thiab qhov voltage yuav. raug txo kom ntau.Thaum lub zaus ntau tshaj 5MHz, AC kuj attenuation nyob rau lub sij hawm no tsis txawv ho nyob rau hauv ob txawv conductors.Tau kawg, qhov no feem ntau yog vim cov tawv nqaij ntawm qhov muaj zaus tam sim no, qhov ntau dua, qhov ze dua qhov tam sim no ntws mus rau saum npoo ntawm tus neeg xyuas pib, qhov saum npoo ntawm tooj liab-clad aluminium conductor yog cov khoom siv tooj liab tiag tiag, thaum qhov zaus yog siab mus rau ib qho taw tes, tag nrho cov tam sim no plated hauv cov khoom siv tooj liab hauv qhov ntws.Ntawm 5MHz, tam sim no ntws nyob rau hauv ib tug tuab ntawm txog 0.025 hli nyob ze ntawm lub nto, thaum lub tooj liab txheej ntawm cov tooj liab-clad aluminium conductor yog hais txog ob zaug li tuab.Rau coaxial cables, vim hais tias cov teeb liab kis tau tus mob siab tshaj 5MHz, qhov kis tau tus mob ntawm tooj liab-clad txhuas conductors thiab ntshiab tooj liab conductors yog tib yam.Lub attenuation ntawm lub cable nyob rau hauv qhov tseeb xeem yuav ua pov thawj qhov no.
Thib peb, los ntawm kev lag luam, tooj liab-clad aluminium conductors yog muag los ntawm qhov hnyav, thiab cov tooj liab ntshiab tooj liab tseem muag los ntawm qhov hnyav, thiab tus nqi ntawm tooj liab-clad aluminium conductors yog kim dua li cov tooj liab ntshiab ntawm tib qhov hnyav.Txawm li cas los xij, tib qhov hnyav ntawm tooj liab-clad aluminium yog ntev npaum li qhov ntev ntawm cov ntshiab tooj liab tus neeg xyuas pib, thiab cov cable yog xam los ntawm qhov ntev.Tib qhov hnyav tooj liab-clad txhuas hlau yog 2.5 npaug ntawm qhov ntev ntawm cov tooj liab hlau, thiab tus nqi tsuas yog ob peb puas yuan ntau dua ib tuj.Ua ke, tooj liab-clad aluminium muaj ntau qhov zoo.Vim tias cov tooj liab-clad aluminium cable yog lub teeb, tus nqi thauj mus los thiab kev teeb tsa ntawm lub cable yuav raug txo, uas yuav ua rau muaj kev yooj yim rau kev tsim kho.
Tsis tas li ntawd, tooj liab-clad aluminium cables yooj yim rau kev tswj hwm thiab muaj nqi kho qis dua li cov tooj liab dawb huv.Kev siv tooj liab-clad txhuas tuaj yeem txo cov kev ua haujlwm tsis ua haujlwm thiab zam cov neeg ua haujlwm hauv network los ntawm "txiav cov tub ntxhais hauv lub caij ntuj no thiab txiav cov tawv nqaij thaum lub caij ntuj sov" thaum lub sijhawm tu (txheej txhuas strip longitudinal pob lossis txhuas raj khoom).Vim muaj qhov sib txawv loj hauv thermal expansion coefficient ntawm tooj liab sab hauv tus neeg xyuas pib thiab aluminium sab nraud tus neeg xyuas pib ntawm lub cable, thaum lub caij ntuj sov kub, aluminium sab nrauv tus neeg xyuas pib yuav nthuav dav heev, thiab cov tooj liab sab hauv tus neeg xyuas pib yuav poob qis thiab tsis tuaj yeem hu rau kev sib cuag elastic. phaj nyob rau hauv lub rooj zaum F-lub taub hau.Nyob rau hauv lub caij ntuj no txias, aluminium txheej conductor shrinks zoo heev, ua rau lub shielding txheej poob.Thaum tooj liab clad txhuas sab hauv tus neeg xyuas pib siv hauv coaxial cable, thermal expansion coefficient ntawm nws thiab txhuas txheej tus neeg xyuas pib yog me me, qhov txhaum ntawm cable core-rub tau txo qis heev thaum kub hloov, thiab kev sib kis tau zoo ntawm lub network zoo dua.
Hlau thiab cable kev lag luam siv tooj liab npog txhuas hlau kuj yog ib txoj hauv kev zoo los txo cov kev lag luam siab tam sim no, cov hlau bimetallic ua los ntawm ib txheej ntawm tooj liab sab nraum lub txhuas hlau, vim nws qhov me me, kev sib kis tau zoo thiab lwm yam zoo. , tshwj xeeb tshaj yog tsim nyog rau kev ua tus neeg xyuas pib sab hauv ntawm RF coaxial cable, piv nrog cov hlau ntshiab tooj liab, nws qhov ceev yog li 40% ntawm cov tooj liab ntshiab.Cov yam ntxwv sib kis tau zoo dua li cov tooj liab dawb huv, uas yog qhov zoo tshaj plaws RF coaxial cable ceg kab neeg xyuas pib.
Txoj kev loj hlob ntawm tooj liab-clad aluminium cable khoom nyob rau hauv lub neej yav tom ntej tseem yuav tsum tau tag nrho cov hlau thiab cable kev lag luam, nrog rau cov tuam txhab tsim khoom los txhawb cov ntawv thov los ntawm kev siv zog los txhim kho kev ua tau zoo thiab kev paub txog cov khoom lag luam, yog li txhawm rau txhawb kev txhawb nqa ntawm Tuam Tshoj txoj kev lag luam cable.
Lub sij hawm xa tuaj: Feb-28-2024