Li cas los daws cov teeb meem tawg ntawm Polyethylene Sab Xev Sab Nraud Sab Nraum Hlau Ncaws Hniav

Yuav ua li cas los daws cov teeb meem tawg ntawm polyethylene sab cov hnab riam nrog steel daim kab xev armor Polyethylene yog ib qho ntawm feem ntau siv cov ntaub ntawv raw khoom hauv cov hnab yas tshiab.

Vim tias nws cov tshuab zoo muaj zog, zoo nruj thiab zoo heev tiv tshav kub, rwb thaiv tsev thiab tshuaj lom neeg ruaj khov, nws tau siv dav hauv rwb thaiv tsev thiab sheath ntawm xaim xaim hluav taws xob thiab cable, xov tooj cable.

Lwm qhov zoo dua ntawm polyethylene yog tias nws muaj cov dej ua kom zoo dua. Yog li no, polyethylene feem ntau siv los ua cov hnab riam ntawm cable thaum tsim cov qauv ntawm cov dej-resistant cable.

Raws li cov txheej txheej cable txheej, qee tus neeg yuav khoom siv lub cable yuav tsum muaj cov dej ua kom tau zoo, tsis tas yuav tsum tau polyethylene ua cov cable sab hauv ncoo, tab sis kuj yuav tsum tau polyethylene ua cov khoom siv hnab tso rau sab nraud.

Tab sis ib qho tseem ceeb tshaj qhov tsis zoo ntawm polyethylene yog nws qhov tsis zoo tiv thaiv kev nyuaj siab ib puag ncig.

Vim yog cov qauv ntawm cov khoom siv nws tus kheej, nws yog rhiab rau kev ntxhov siab sab nraud. Hauv cov xwm txheej tshwj xeeb, kev tawg pleb tshwm sim nyob rau lub sijhawm luv luv hauv kev ntxhov siab me me, uas cuam tshuam kev pab lub neej ntawm cov khoom siv.

Peb lub tuam txhab tau ob zaug tau txais daim ntawv cog lus zoo li no (YJY23 8.7 / 10kV 3 * 400), tom qab extruded polyethylene sab sheath rewind coil, sheath cracking phenomenon tshwm sim nyob ntawm ntug ntawm txoj hlua khi sab nrauv steel, thiab peb tau sib tham nrog lwm tog neeg siv PVC raws li cov hnab riam sab nraud ntawm lub cable.

Tom qab ntawd yuav ua li cas tawg ntawm polyethylene sab hnab riam sab nraud steel daim kab xev armor tuaj mus rau hauv ua?

1. Extrusion kub thiab cua txias

Extrusion kub muaj qhov cuam tshuam zoo rau kev ua haujlwm ntawm polyethylene sheath. Tshaj siab kub tsis yooj yim los teeb, dhau qhov kub tsis dhau yuav ua rau cov yas tsis sib xws, cuam tshuam ncaj qha rau cov khoom kho tshuab ntawm cov khoom thiab nto tiav, yog li teeb tsa extrusion kub tshwj xeeb heev.

Polyethylene yog qhov yooj yim rau crystallized nyob rau hauv qhov kub thiab txias siab, ua rau cov khoom siv tawm, hauv cov txheej txheem ntau lawm, nyob rau lub sijhawm luv luv, cov polyethylene los ntawm ntau tshaj 200 degrees rau kaum ob degrees ntawm dej txias, (lub caij ntuj no tsuas yog ob peb qib ) tom qab lub cua txias sab nraud ntim ruaj ruaj, tom qab sab hauv lub zog txias yuav tsim tawm microholes.

Qee qhov polyethylene saw ntu tau khov yog tsis muaj kev kho kom haum, uas ua rau lub ntsuas kub ntawm cov kab ntawm sheath muaj ntau thiab ua kom qhov tshwm sim ntawm kev tawg ua raws li kev ua ntawm lub zog loj sab nraud.

Yog li qhov brittleness tshwm sim los ntawm qhov ntsuas txias txias tuaj yeem txo los ntawm kev siv qhov kub tsis siv lub taub hau kub thiab txias dej tank tshooj ntawm ntu.

Lub flatness ntawm armored saum npoo thiab tuab ntawm sheathing

Vim tias qhov loj armoured sab nrauv thiab hnyav cable, extruded tube los yog semi-extruded tube tsuas yog siv nyob rau hauv kev tsim cov hnab riam sab nraud.

Ntxiv rau txheej thaiv txheej txheem yog tsim ntawm ob chav xeb hlau sib xyaw nyob ib ncig ntawm lub pob, thiab zoo li YJY23 8.7 / 10 kv 3 * 400 lub thickness ntawm cov hlau coj los siv rau 0.8 hli, saum npoo tawv, tom qab kos cov xim nyob rau sab nraud ntawm cov cuab yeej, muaj hnab riam tuab tsis zoo sib xws, ncab txheej txheem pom sab laug: sheathed hauv txheej txheem ncab, los ntawm (1) txog (2), (3), (4), (5) (lub voj) tuab ntawm sheath yuav tshwm sim hloov loj heev, ( 2), (4) ob qhov txuas (piv txwv li, sab npoo ntawm kab txaij) qhov tuab tshaj plaws ntawm cov hnab riam, qhov kub siab ntawm cov kev ntxhov siab sab hauv yog qhov chaw tseem ceeb ntawm kev tawg tom ntej.

3. Thermal shrinkage kev ua tau zoo ntawm polyethylene nws tus kheej

Cov khoom siv polyethylene nws tus kheej kuj tseem muaj cov thermal shrinkage kev ua tau zoo, qhov shrinkage los ntawm lub xeev kub rau txias lub xeev yog feem ntau nyob ib ncig ntawm 8%, yog li cov kub polyethylene sheath txheej nyob rau sab saum npoo armored yuav maj mam txias thiab thaum kawg tig mus rau hauv lub xeev txias tom qab nkag rau hauv lub tank. Lub txias polyethylene sheath yuav nruj nreem qhwv ob-txheej steel txoj hlua khi, ua rau nws tsis yooj yim rau txoj hlua khi hlua khau los ntawm sab rau sab.

Tsis tas li ntawd, lub sheathing tuab ntawm lub npoo ntawm sab nraud ntawm txoj siv hlau tau hais los saum toj no yog qhov thinnest, thiab qhov ntug ntawm sheathing txheej ua warped thaum lub cable saum coil yog khoov, yog li muaj qhov cuam tshuam los ntawm sab nraud sheathing, uas ua ntawm qhov chaw tsis muaj zog ntawm qhov sheathing thiab thaum kawg ua rau sheathing kom tawg.

Thaum Lub Kaum Ib Hlis 2004, peb lub tuam txhab tau txais kev cog lus ntawm Suzhou Suyuan Fais Fab Chaw Ua Haujlwm YJY23 8.7 / 15kV 3 * 400 txog li 30km, nrog tag nrho ntau dua 60 cable. Cov cuab yeej hluav taws xob tshwj xeeb ntawm Suyuan Power Supply Bureau tseem hais tias polyethylene yuav tsum tau siv los ua lub puab sab hauv thiab tiv thaiv txheej sab hauv ntawm cov cable.

Txhawm rau kom daws qhov teeb meem no ntev, peb thaum kawg daws cov teeb meem tawg ntawm polyethylene sab sheath sab nraud daim kab xev hlau armor los ntawm ntau cov ntawv pov thawj.

Cov kev ntsuas tshwj xeeb yog cov hauv qab no:

1, txo cov kub extrusion, siv dej sov ua kom txias los ntawm ntu.

2. Cov ntsiab lus tseem ceeb tshaj plaws yog tias, ntxiv rau cov hnab looj tes polyethylene, txheej txheej ntawm cov ntaub tsis-cov ntaub npog nrog sib tshooj ntawm 10% yuav tsum tau ntev ua tib zoo npog ntawm cov hlua steel armoured nto.

Vim tias muaj qee qhov sib txawv nruab nrab ntawm cov ntaub tsis-cov ntaub thiab cov ntaub nplaum steel khi cov txheej txheej ntawm lub npoo ntev ntev, qhov chaw tiaj ua ntej cov kab xev xau daws teeb meem, ua rau cov tuab ntawm polyethylene sheath uniform thiab zoo ib yam.

Los ntawm kev siv lub thermal shrinkage kev ua tau zoo ntawm PE nws tus kheej, cov khaub ncaws tsis sib xws thiab cov khaub ncaws xoob xoob xoob yog ua kom maj mam dhau tom qab nkag mus rau hauv dej sov, kom cov polyethylene sheath qhwv nyob rau hauv ntev ntev tsis-woven daim ntaub yuav tsis lo tawm lossis qhwv dhau nruj, yog li txo sab hauv kev ntxhov siab.

3. Qhov kos duab me me (1.5 ~ 2.0) raug saws thaum xaiv pwm.

Thaum kawg los ntawm kev ntsuas saum toj saud, ua tiav txoj haujlwm xa khoom raws li tau teem tseg, polyethylene cracking tus nqi ntawm 0%, kom ntseeg tau cov khoom zoo.