Kev ntsuam xyuas hluav taws kub ntawm cov hlau thiab cable
1. Kev tshuaj xyuas ntawm kev tiv thaiv hluav taws
1.1 nplaim retardant mechanism
Kev tsim cov nplaim retardant muaj peev xwm ntawmkab thiab kabnyob rau hauv cov txheej txheem rwb thaiv tsev cov ntaub ntawv nyob rau hauv cov txheej txheem ntawm kev ua thiab zus tau tej cov nplaim retardant tus neeg saib xyuas, yog li ntawd thaum hluav taws tshwm sim, lub zog thiab kev ua tau zoo ntawm lub rwb thaiv tsev txheej tau hloov, thiab ces ua tiav cov nyhuv ntawm nplaim retardant.
(1) Endothermic kev ua. Thaum hluav taws tshwm sim, txheej rwb thaiv tsev ntawm cov xov hlau thiab cables cuam tshuam los ntawm qhov kub thiab txias thiab thermal tawg tshwm sim, rhuav tshem cov qauv ntawm cov txheej txheem rwb thaiv tsev, uas yog qhov ncaj qha ua rau poob ntawm lub peev xwm ntawm cov rwb thaiv tsev ntawm cov rwb thaiv tsev. Tom qab ntxiv nplaim retardants, nplaim retardants decompose nyob rau hauv high kub, thiab nqus tau ntau ntawm tshav kub thaum lub sij hawm cov txheej txheem, yog li txo qhov kub ntawm lub rwb thaiv tsev txheej thiab ncua lub thermal decomposition tus nqi ntawm cov khoom. Tsis tas li ntawd, nyob rau hauv qhov kub thiab txias, qhov kev hloov ntawm cov nplaim hluav taws kub retardant theem thiab nqus cov cua kub ntau kuj yog ib qho tseem ceeb rau ncua qhov nce ntawm qhov kub thiab txias ntawm lub rwb thaiv tsev txheej.
(2) Tshem tawm cov tshuaj tiv thaiv. Thaum nplaim retardants yog decomposed los ntawm tshav kub, ib tug loj tus naj npawb ntawm blocking tshuaj yog tsim. Cov tshuaj no cuam tshuam nrog cov combustion reactants, tiv thaiv cov tshuaj tiv thaiv combustion mus ntxiv, ua lub luag haujlwm hauv kev tua hluav taws.
(3) Tsim cov txheej txheem cais. Thaum cov txheej txheej rwb thaiv tsev yog rhuab, cov khoom tsim tawm yuav tsim cov txheej txheem nyuaj ntawm cov kab hluav taws xob thiab cov xaim, yog li cais cov khoom siv tsis muaj kev cuam tshuam los ntawm lub ntiaj teb sab nraud, txo cov cua sov tshaj tawm thiab ncua cov txheej txheem thermal tawg ntawm rwb thaiv tsev. txheej.
1.2 Hluav taws kub tsis kam mechanism
(1) qhov hluav taws kub tsis kam ntawm cov hlau thiab cable yog tsuas yog ua tiav los ntawm kev ntxiv qee yam ntawm cov khoom ntxiv hauv cov rwb thaiv tsev thiab cov ntaub qhwv ntawm cov hlau thiab cable. Nyob rau hauv ib puag ncig hluav taws kub, cov khoom siv ntxiv tuaj yeem txo cov cua sov uas tsim los ntawm cov khoom siv polymer, tiv thaiv cov decomposition ntawm polymer los yog txhawb cov carbonization ntawm rwb thaiv tsev thiab sheath cov ntaub ntawv los tsim ib txheej tiv thaiv.
(2) Kev sib cais ntawm lub cev yog lwm txoj hauv kev los txhim kho qhov hluav taws kub ntawm cov xov hlau thiab cables. Tam sim no, txoj kev siv feem ntau yog siv mica iav ribbon los npog cov hlau tub ntxhais hlau ncig, los ntawm mica iav ribbon muaj qhov kub thiab txias, cov nyhuv rwb thaiv tsev los txhim kho qhov kub thiab txias ntawm cov hlau thiab cable, kom nws tuaj yeem ua haujlwm tau zoo. nyob rau hauv qhov kub thiab txias ib puag ncig rau lub sijhawm.
1.3 Mechanism ntawm ntxhia insulated cable
Txoj kev no ntawm kev txhim kho cov nplaim hluav taws xob muaj peev xwm ntawm cov hlau thiab cable yog pab los ntawm kev nqus ntawm cov hlau hydrate. Hauv qab no yog ib qho piv txwv ntawm ob hlau hydrates, aluminium hydroxide thiab magnesium hydroxide. Nyob rau hauv qhov kub thiab txias ib puag ncig, aluminium hydroxide thiab magnesium hydroxide yog decomposed los ntawm tshav kub, feem, los tsim txhuas oxide thiab dej, magnesium oxide thiab dej, thiab nqus tau cua sov ntau nyob rau tib lub sij hawm. Cov kev sib npaug tshwj xeeb yog raws li hauv qab no:
(1) 2A I(OH)3 - A l~O3 plus 3H 2O - 2648KJ
(2) M g (OH)2- - M gO plus H
Lub combustion tus nqi ntawm insulating polymer yog tswj tau zoo heev vim hais tias ntawm ntau npaum li cas ntawm tshav kub absorbed.
