Lub cable yog suav nrog ntawm 4 ntu.
Corekaum hlau tub ntxhais: ua los ntawm cov khoom siv siab (tooj lossis txhuas). Ua raws li qhov yuav tsum tau ntawm qhov muag muag ntawm lub cable, txhua lub chaw xaim yuav ua los ntawm ib qho xaim lossis ntau cov xov hlau.
Cov txheej txheem insulating: cov ntaub ntawv insulating siv los ua cov cable yuav tsum muaj cov nyiaj rov qab siab, muaj zog dielle thiab qis dielectric tas li. Commonly used in cables are oil-impregnated paper, polyvinyl chloride, polyethylene, cross-linked polyethylene, rubber, etc. Cables are often classified as insulating materials, such as oil-immersed paper-immersed insulated cables, polyvinyl chloride Cables, Cross - Txuas Polyethylene cables, thiab lwm yam.
Sealing sheath: tiv thaiv cov hlau insulating hlau tub ntxhais los ntawm kev puas tsuaj los ntawm kev puas tsuaj los ntawm cov tshuab, noo noo, txhuas, tshuaj txhuas kom noo, txhuas lossis txhuas extruded seab sheating sheath feem ntau siv.
Cov npog npog tiv thaiv: siv los tiv thaiv cov pob txaws ntawm kev puas tsuaj. Feem ntau, galvanized steel ib daim, hlau xaim, tooj hlau tooj, tooj liab hlau, thiab lwm yam siv los qhwv ib ncig ntawm cov hnab riam (hu ua cable cable). Cov txheej ua rog kuj tseem ua raws li hluav taws xob thaiv thiab tiv thaiv kev cuam tshuam sab nraud hluav taws xob. Txhawm rau kom tsis txhob corrosion ntawm steel ib daim thiab xaim los ntawm cov xov xwm ib puag ncig, lawv feem ntau yog siv nrog impregnated jutethylene txheej lossis polyvinyl chloride tes tsho.
Raws li lawv lub hom phiaj, cov xaim hluav taws xob tuaj yeem muab faib ua lub hwj huam cables, kev sib txuas lus cable thiab tswj cables. Piv nrog siv nyiaj siv ua haujlwm, qhov zoo ntawm cov cable yog tias lawv muaj qhov chaw sib kis ib puag ncig, thiab muaj kev cuam tshuam loj rau tus kheej kev nyab xeeb thiab thaj chaw ib puag ncig. Txawm li cas los xij, tus nqi yog qhov siab, kev tsim kho thiab kev txij nkawm yog ob qho teeb meem, thiab kev tsim khoom kuj tseem nyuaj dua. Yog li ntawd, cov xaim feem ntau yog siv nyob rau hauv cov cheeb tsam uas muaj cov pej xeem thiab cov chaw muaj plaub hau thiab cov chaw tsheb tsis khoom; Thaum pw hla dej ntws, dej ntws thiab underwater, loj-} span lat las ntaij teb chaws tuaj yeem zam tau. Cables kuj tseem siv tau qhov twg overhead yuav tsum kom tsis txhob muaj kev cuam tshuam kev cuam tshuam, thiab qhov twg kev ua kom zoo nkauj yuav tsum tau txiav txim siab lossis raug rau lub hom phiaj.
Raws li cov kev hloov pauv hloov tam sim no thiab cov kev hloov pauv ntawm lub zog hluav taws xob yuav tsim tawm vim yog cov khoom siv hluav taws xob thiab kev sib zog ntawm cov tub ntxhais. Tus loj dua tus ntoo khaub lig -} ntu ntawm cov cable tseem ceeb, qhov ntau dua cov thermal kho tshuab quab yuam yog tsim; Nyob rau tib lub sijhawm, cov tub ntxhais thiab hlau sheath yuav ua kom nkag tsis tau vim muaj ntau lub voj voog ntawm thermal expansion thiab condaction. Vim tias thermal expends ua rau muaj kev hem thawj loj rau kev ua haujlwm ntawm lub zog hluav taws xob, nws yuav ua rau cov haujlwm cable cable, nws yuav ua rau cov kab ke cable, xaub, thiab txawm tias puas cov xaim thiab accessories. Yog li ntawd, nws yog ib qho tsim nyog los them sai sai rau qhov nthuav tawm thermal thiab maub los ntawm loj- ntu cables.
Cov kev hem thawj los ntawm kev nthuav dav thiab kev cog lus ntawm cov xaim hluav taws xob kom muaj kev ua haujlwm zoo nyob rau ntau txoj kev teeb yog:
(1) Thaum pw ncaj qha, cov cable yog txwv los ntawm cov av nyob ib puag ncig, thiab tag nrho cable tsis tuaj yeem hloov pauv. Yog li ntawd, cov hlau core yuav tsim kom muaj ntau qhov tawg ntawm ob qho kawg ntawm cov kab hauv qab lub zog, ua rau muaj kev hem thawj ntawm kev nyab xeeb ntawm cable accessories.
(2) Thaum tso cov yeeb nkab dabtsi, cov cable yuav yog khoov thiab deformation raws li kev ua ntawm thermal mechanical zog; Raws li txoj cab txuas txuas ntxiv hloov rau hauv lub cable kub, khoov li cas deformation yuav tshwm sim tas li, ua rau fatigue sib zog hauv cov hlau cable hlau.
(3) Thaum tso lub qhov, cov kab ke feem ntau yog muab tso rau ntawm lub bracket uas tsis muaj rigid kho, yog li ntawd cov xaim, thiab swb rau ntawm thaj chaw uas tsis muaj tshwm sim; Kev xa tawm hnyav yog nquag tshwm sim ntawm khoov ntawm lub cable; Raws li cov cables txuas ntxiv hloov hauv lub cable kub, lawv tseem yuav muaj khoov thiab deform backing thiab deform bitle, ua rau fatague sib txig nyob rau hauv lub hau hlau ntawm lub cable.
(4) Thaum tso tus ncej, tus kheej- qhov hnyav thiab thermal kho tshuab quab yuam mus rau cov kev pabcuam hlau, yog li cov kev pabcuam kom luv rau lub neej ntawm lub cable.
(5) Thaum tso tus choj, yog tias lub cable yog nteg nyob rau hauv lub qab paug yeeb nkab ntawm tus choj, muaj tib qho teeb meem uas yog kev tso cov yeeb nkab ntws; Yog hais tias lub cable yog nteg nyob rau hauv lub box girder ntawm tus choj, muaj cov teeb meem tib yam li lub qhov quav. Ntxiv rau, cov cables nteg ntawm tus choj tseem yuav muaj kev cuam tshuam los ntawm kev nthuav dav thiab kev co ntawm tus choj, yog li nrawm nrawm rau lub cable hlau sheath.