Lub hauv paus tseem ceeb ntawm kev xaiv ib coaxial cable rau ib lub hom phiaj yog nws cov khoom hluav taws xob, cov khoom siv kho tshuab thiab cov yam ntxwv ib puag ncig.Hauv qee qhov chaw, kev ua haujlwm tua hluav taws kuj tseem ceeb.Tag nrho cov khoom no nyob ntawm tus qauv cable thiab cov ntaub ntawv siv.
Cov khoom siv hluav taws xob tseem ceeb tshaj plaws ntawm cov kab hluav taws xob yog qhov qis attenuation, tsis zoo impedance, siab rov qab poob, thiab lub ntsiab lus tseem ceeb rau cov xaim cable yog nws qhov pom kev sib txuas.Cov khoom tseem ceeb tshaj plaws yog flexural zog (tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias), tensile zog, compressive zog thiab hnav tsis kam.Cables kuj yuav tsum muaj peev xwm tiv taus ib puag ncig kev ntxhov siab thaum thauj, khaws cia, teeb tsa thiab siv.Cov rog no tej zaum yuav raug kev nyab xeeb, los yog lawv yuav tshwm sim los ntawm cov tshuaj lom neeg lossis cov tshuaj tiv thaiv ecological.Yog hais tias lub cable raug ntsia rau hauv ib qho chaw uas muaj kev nyab xeeb ntawm hluav taws kub, nws qhov kev ua tau zoo ntawm hluav taws kuj tseem ceeb heev, ntawm peb qhov tseem ceeb tshaj plaws yog: qeeb ignition, pa taws ceev thiab tso pa tawm halogen.
Lub luag haujlwm tseem ceeb ntawm cable yog xa cov teeb liab, yog li nws yog ib qho tseem ceeb uas cov qauv cable thiab cov ntaub ntawv muab cov yam ntxwv zoo sib kis thoob plaws hauv lub neej ntawm cable, uas yuav tau tham txog hauv qab no.
1. Sab hauv tus neeg xyuas pib
Tooj liab yog cov khoom tseem ceeb ntawm tus neeg xyuas pib, uas tuaj yeem ua tau raws li hauv qab no: annealed tooj liab hlau, annealed tooj liab raj, tooj liab coated txhuas hlau.Feem ntau, tus neeg xyuas pib sab hauv ntawm cov cables me me yog tooj liab lossis tooj liab-clad txhuas hlau, thaum cov cables loj siv cov raj tooj liab los txo qhov hnyav thiab tus nqi.Qhov loj cable sab nrauv tus neeg xyuas pib yog striped, kom zoo txaus bending kev ua tau zoo.
Tus neeg xyuas pib sab hauv muaj kev cuam tshuam zoo rau cov teeb liab kis tau tus mob vim tias qhov attenuation feem ntau tshwm sim los ntawm kev tsis kam ntawm cov neeg xyuas pib sab hauv.Cov conductivity, tshwj xeeb tshaj yog nto conductivity, yuav tsum siab npaum li sai tau, thiab qhov yuav tsum tau dav dav yog 58MS / m (+20 ℃), vim hais tias nyob rau hauv high zaus, tam sim no tsuas yog kis nyob rau hauv ib tug nyias txheej ntawm tus neeg xyuas pib nto, qhov tshwm sim no. yog hu ua cov nyhuv ntawm daim tawv nqaij, thiab cov tuab tuab ntawm cov txheej txheem tam sim no hu ua qhov tob ntawm daim tawv nqaij.Daim duab 1 qhia txog qhov tob ntawm daim tawv nqaij ntawm cov raj tooj liab thiab tooj liab-clad txhuas hlau ua cov khoom siv sab hauv ntawm cov zaus tshwj xeeb.
Qhov zoo ntawm cov khoom siv tooj liab siv nyob rau hauv tus neeg xyuas pib sab hauv yog qhov siab heev, xav tau tias cov khoom siv tooj liab yuav tsum tsis muaj impurities, thiab qhov chaw yog huv si, du thiab du.Sab hauv tus neeg xyuas pib txoj kab uas hla yuav tsum ruaj khov nrog me me tolerances.Txhua qhov kev hloov pauv hauv txoj kab uas hla yuav txo qhov impedance uniformity thiab rov qab poob, yog li cov txheej txheem tsim khoom yuav tsum raug tswj kom raug.
2. Tus neeg xyuas pib
Tus neeg xyuas pib sab nrauv muaj ob txoj haujlwm yooj yim: thawj zaug yog kev ua haujlwm ntawm lub voj voog, thiab qhov thib ob yog kev tiv thaiv kev ua haujlwm.Tus neeg xyuas pib sab nrauv ntawm lub xaim cable kuj txiav txim siab nws qhov kev ua tau zoo.Tus neeg xyuas pib sab nrauv ntawm coaxial feeder cable thiab super hloov tau yooj yim yog welded los ntawm cov yeeb nkab tooj liab.Tus neeg xyuas pib sab nraud ntawm cov cables no raug kaw tag nrho, uas tsis tso cai rau cov hluav taws xob los ntawm cable.
Tus neeg xyuas pib sab nrauv feem ntau yog longitudinally coated nrog tooj liab daim kab xev.Muaj longitudinal los yog transverse notches los yog qhov nyob rau hauv txheej txheej conductor.Grooving ntawm tus neeg xyuas pib txheej yog muaj nyob rau hauv corrugated cable.Cov corrugation peaks yog tsim los ntawm equidistant txiav grooves raws axial kev taw qhia.Qhov kev faib ua feem ntawm qhov txiav yog me me, thiab qhov sib nrug ntawm qhov sib txawv me dua li qhov sib kis ntawm electromagnetic yoj ntev.
Obviously, cov tsis-leak cable yuav ua tau rau hauv ib tug leaky cable los ntawm machining nws raws li nram no: lub sab nrauv conductor yoj ncov ntawm cov corrugated cable nyob rau hauv lub non-leaky cable yog txiav ntawm ib tug kaum sab xis ntawm 120 degrees kom tau ib tug tsim nyog. qhov rooj qauv.
Cov duab, qhov dav thiab qhov qauv ntawm cov xaim cable txiav txim siab nws qhov Performance index.
Cov khoom siv tooj liab rau cov neeg xyuas sab nrauv yuav tsum yog cov khoom zoo, nrog rau kev ua haujlwm siab thiab tsis muaj impurities.Tus neeg xyuas pib loj yuav tsum nruj me ntsis tswj nyob rau hauv qhov kam rau ua kom paub meej cov yam ntxwv impedance thiab siab rov qab poob.
Qhov zoo ntawm welding tus neeg xyuas pib sab nraud ntawm cov dov tooj liab raj yog raws li nram no:
Ua kom tiav Ib qho kev tiv thaiv tag nrho sab nrauv uas tsis muaj hluav taws xob tsis muaj hluav taws xob thiab tiv thaiv kev ya raws los ntawm kev cuam tshuam
Nws tuaj yeem ua dej tsis tau ntev vim yog lub nplhaib corrugations
Mechanical zog yog ruaj khov heev
High mechanical zog
Zoo heev bending kev ua tau zoo
Kev sib txuas yog yooj yim thiab txhim khu kev qha
Lub super saj zawg zog cable muaj ib tug me me dabtsi yog khoov vojvoog vim lub sib sib zog nqus kauv corrugation
3, insulating nruab nrab
Rf coaxial cable nruab nrab yog deb ntawm tsuas yog ua si lub luag hauj lwm ntawm rwb thaiv tsev, qhov kawg kis tau tus mob kev ua tau zoo yog tsuas yog txiav txim siab tom qab rwb thaiv tsev, yog li kev xaiv ntawm cov khoom nruab nrab thiab nws cov qauv yog qhov tseem ceeb heev.Tag nrho cov khoom tseem ceeb, xws li attenuation, impedance thiab rov poob, yog nyob ntawm kev rwb thaiv tsev.
Cov kev cai tseem ceeb tshaj plaws rau kev rwb thaiv tsev yog:
Tsawg tus txheeb ze dielectric tas li thiab me me dielectric poob lub kaum sab xis kom ntseeg tau tias me me attenuation
Cov qauv zoo ib yam kom ntseeg tau tias tsis sib xws impedance thiab loj ncha poob
Cov khoom siv ruaj khov kho kom ntseeg tau lub neej ntev
waterproof
Lub cev muaj zog ua npuas ncauj rwb thaiv tsev tuaj yeem ua tau raws li tag nrho cov kev cai saum toj no.Nrog cov txheej txheem extrusion thiab roj txhaj tshuaj thiab cov ntaub ntawv tshwj xeeb, cov qib foaming tuaj yeem ncav cuag ntau dua 80%, yog li qhov kev ua tau zoo ntawm hluav taws xob yog nyob ze rau cov cua rwb thaiv tsev cable.Nyob rau hauv txoj kev txhaj tshuaj roj, nitrogen yog ncaj qha mus rau hauv cov khoom nruab nrab hauv lub extruder, uas tseem hu ua lub cev foaming txoj kev.Piv nrog rau cov tshuaj foaming no, nws cov qib foaming tsuas tuaj yeem ncav cuag li 50%, qhov nruab nrab poob loj dua.Cov qauv ua npuas dej tau txais los ntawm txoj kev txhaj tshuaj roj yog zoo ib yam, uas txhais tau hais tias nws impedance tsis sib xws thiab lub ncha poob loj.
Peb cov RF cables muaj cov khoom hluav taws xob zoo heev vim qhov me me dielectric poob lub kaum sab xis thiab cov ntaub ntawv loj foaming ntawm cov ntaub ntawv insulating.Cov yam ntxwv ntawm qhov nruab nrab foaming yog qhov tseem ceeb ntawm cov khoom siv siab.Nws yog qhov tshwj xeeb foaming qauv uas txiav txim siab qhov qis attenuation kev ua tau zoo ntawm cable ntawm high zaus.
Cov txheej txheem MULTI-LAYER Rwb thaiv tsev tshwj xeeb (SIJ HAWM THIN LAYER - FOAMING txheej - txheej txheej nyias) co-extrusion txheej txheem tuaj yeem tau txais cov qauv, kaw ua npuas ncauj, nrog cov khoom ruaj khov, muaj zog thiab zoo noo noo thiab lwm yam ntxwv.Txhawm rau ua kom cov cable tseem tswj tau cov hluav taws xob zoo hauv qhov chaw ntub dej, peb tshwj xeeb tsim ib hom kab hluav taws xob: ib txheej nyias ntawm cov tub ntxhais PE ntxiv rau saum npoo ntawm cov npuas rwb thaiv tsev txheej.Cov txheej txheej nyias nyias no tiv thaiv kev nkag mus ntawm noo noo thiab tiv thaiv kev ua haujlwm hluav taws xob ntawm lub cable txij thaum pib ntawm kev tsim khoom.Qhov kev tsim no tseem ceeb tshwj xeeb tshaj yog rau cov xaim cables nrog perforated txheej conductors.Tsis tas li ntawd, lub rwb thaiv tsev txheej yog nruj nreem qhwv nyob ib ncig ntawm lub puab conductor los ntawm ib tug nyias puab txheej, uas ntxiv txhim kho cov neeg kho tshuab stability ntawm lub cable.Ntxiv mus, cov txheej nyias nyias muaj cov stabilizer tshwj xeeb, uas tuaj yeem ua kom muaj kev sib raug zoo nrog tooj liab thiab ua kom lub neej ntev ntawm peb cov cable.Xaiv cov khoom tsim nyog sab hauv nyias txheej, tuaj yeem tau txais cov khoom txaus siab, xws li: noo noo tsis kam, adhesion thiab stability.
Qhov txheej txheej txheej rwb thaiv tsev no (nyias txheej sab hauv - npuas txheej - nyias txheej txheej) tuaj yeem ua tiav ob qho tib si hluav taws xob zoo thiab cov khoom siv kho tshuab ruaj khov, yog li txhim kho lub neej kev pab ntev thiab kev ntseeg siab ntawm peb cov RF cables.
4, qob
Cov khoom siv feem ntau siv rau cov kab hluav taws xob sab nraum zoov yog cov xim dub linear low-density polyethylene, uas muaj qhov ntom ntom zoo li LDPE tab sis lub zog piv rau HDPE.Hloov chaw, qee zaum, peb nyiam HDPE, uas muab cov khoom siv kho tshuab zoo dua thiab ua haujlwm rau kev sib txhuam, chemistry, noo noo, thiab lwm yam kev mob.
UV-proof dub HDPE tuaj yeem tiv taus kev ntxhov siab xws li qhov kub thiab txias heev thiab UV rays.Thaum hais txog kev nyab xeeb ntawm hluav taws xob ntawm cov cables, cov khoom siv hluav taws xob tsawg halogen tsis muaj nplaim taws yuav tsum tau siv.Hauv cov xaim hluav taws xob, txhawm rau txhawm rau txo qhov sib kis ntawm hluav taws, hluav taws kub retardant daim kab xev tuaj yeem siv nruab nrab ntawm tus neeg xyuas pib thiab cov sheath kom cov txheej txheej rwb thaiv tsev uas yooj yim rau yaj hauv lub cable.
5, hluav taws kev ua haujlwm
Leaky cables feem ntau yog ntsia rau hauv qhov chaw uas muaj kev nyab xeeb hluav taws kub.Kev nyab xeeb ntawm lub teeb tsa cable yog cuam tshuam nrog kev ua haujlwm hluav taws xob ntawm lub cable nws tus kheej thiab qhov chaw teeb tsa.Flammability, pa luam yeeb ntom ntom thiab tso tawm roj halogen yog peb yam tseem ceeb ntsig txog kev ua haujlwm hluav taws xob cable.
Kev siv cov nplaim hluav taws retardant sheathing thiab siv txoj hlua hluav taws xob cais tawm thaum hla ntawm phab ntsa tuaj yeem tiv thaiv cov nplaim taws los ntawm kev sib kis ntawm kab.Qhov ntsuas hluav taws xob qis tshaj plaws yog qhov ntsuas hluav taws xob ntsug ntawm ib lub cable raws li IEC332-1 tus qauv.Tag nrho cov kab hluav taws xob sab hauv tsev yuav tsum ua tau raws li qhov xav tau no.Qhov yuav tsum tau nruj dua yog raws li IEC332-5 tus qauv bundle combustion test.Nyob rau hauv qhov kev ntsuam xyuas no, cov cables raug hlawv vertically nyob rau hauv bundles, thiab lub combustion ntev yog tsis pub tshaj tus nqi teev.Tus naj npawb ntawm cov cables muaj feem xyuam rau cov kev xeem cable specifications.Cov pa luam yeeb ceev thaum lub sij hawm hlawv cable yuav tsum tau xav txog.Cov pa luam yeeb muaj qhov pom tsis zoo, pungent tsw, thiab yooj yim ua rau ua pa thiab ua pa nyuaj, yog li nws yuav ua rau muaj teeb meem rau kev cawm thiab tua hluav taws ua haujlwm.Cov pa luam yeeb ntom ntawm combustion cables yog sim raws li kev sib kis lub teeb sib kis ntawm cov kev hloov pauv hluav taws xob rau cov kab pa hluav taws xob tsawg dua yog 60%.
PVC tuaj yeem ua tau raws li cov cai ntawm IEC 332-1 thiab IEC 332-3.Nws yog cov khoom siv sib xyaw thiab cov tsoos tsho rau cov hlua hauv tsev, tab sis nws tsis yog qhov zoo tagnrho thiab tuaj yeem ua rau tuag taus yooj yim thaum xav txog kev nyab xeeb hluav taws.Thaum rhuab mus rau qhov kub thiab txias, PVC yuav degrade thiab tsim halogen acids.Thaum PVC sheathed cable raug hlawv, 1 kg ntawm PVC yuav tsim 1 kg ntawm halogen acid nrog ib tug concentration ntawm 30% nrog rau dej.Vim hais tias ntawm no corrosive thiab lom qhov xwm ntawm PVC, qhov kev thov rau halogen-dawb cables tau nce ntau nyob rau hauv xyoo tas los no.Tus nqi ntawm halogen yog ntsuas raws li IEC 754-1 tus qauv.Yog hais tias tus nqi ntawm halogen acid tso tawm los ntawm tag nrho cov ntaub ntawv thaum lub sij hawm combustion tsis tshaj 5mg / g, lub cable yog suav tias yog tsis muaj halogen.
Halogen-free flame retardant (HFFR) cable sheath cov ntaub ntawv feem ntau yog polyolefin tebchaw nrog cov ntxhia pob zeb, xws li txhuas hydroxide.Cov fillers no tawg rau ntawm hluav taws, ua cov txhuas oxide thiab dej vapor, uas ua rau cov hluav taws tsis sib kis.Cov khoom combustion ntawm muab tub lim thiab polymer matrix yog non-toxic, halogen dawb thiab tsis muaj pa luam yeeb.
Kev nyab xeeb hluav taws kub thaum lub sijhawm teeb tsa cable suav nrog cov hauv qab no:
Thaum kawg ntawm kev nkag mus rau cable, cov kab hluav taws xob sab nraum zoov yuav tsum tau txuas nrog cov hluav taws xob hluav taws xob
Zam kev teeb tsa hauv chav thiab thaj chaw uas muaj hluav taws kub
Qhov hluav taws kub thaiv los ntawm cov phab ntsa yuav tsum muaj peev xwm hlawv tau ntev txaus thiab muaj cov rwb thaiv tsev kub thiab cua nruj
Kev ruaj ntseg kuj tseem ceeb thaum lub sij hawm installation
Post lub sij hawm: Aug-15-2022