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阻(zu)(zu)燃(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)是早研(yan)制出的(de)防火電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)品種之一,其(qi)(qi)特點是在火災情況下,能有效(xiao)的(de)防止火焰沿電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)槽溝、電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)豎井(jing)等(deng)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)敷設密集(ji)部位迅速蔓(man)延而擴大火災范圍。電(dian)(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)一般(ban)使用塑料、橡(xiang)膠(jiao)等(deng)高分子(zi)材料進行包覆,其(qi)(qi)典型(xing)的(de)阻(zu)(zu)燃(ran)(ran)(ran)處(chu)理方(fang)法(fa)(fa)有:利用含鹵(lu)素,阻(zu)(zu)燃(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan),尤其(qi)(qi)是含氟、氯、的(de)阻(zu)(zu)燃(ran)(ran)(ran)塑料、橡(xiang)膠(jiao)作(zuo)絕緣層和護套,這(zhe)是應用普遍的(de)阻(zu)(zu)燃(ran)(ran)(ran)處(chu)理方(fang)法(fa)(fa)。為(wei)實現電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)阻(zu)(zu)燃(ran)(ran)(ran)或提高電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)阻(zu)(zu)燃(ran)(ran)(ran)級別,人們研(yan)制開發(fa)出擠包所謂'隔氧層'或'隔火層'作(zuo)為(wei)填(tian)充或繞包隔火阻(zu)(zu)燃(ran)(ran)(ran)包帶(隔火層)等(deng)新(xin)型(xing)結(jie)構的(de)阻(zu)(zu)燃(ran)(ran)(ran)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan),并把這(zhe)種電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)叫做'隔氧(火)層'電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)。
其主要原理是在材料中(zhong)(zhong)添加了金屬(shu)水(shui)合物成份,也可(ke)分(fen)別(bie)實現(xian)(xian)低鹵(lu)低煙(yan)、無鹵(lu)低煙(yan)和(he)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)阻(zu)(zu)(zu)燃(ran)(ran)化(hua)。但是,所謂'隔(ge)(ge)氧(yang)(yang)層'和(he)'隔(ge)(ge)火(huo)(huo)層'只(zhi)是實現(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)阻(zu)(zu)(zu)燃(ran)(ran)的(de)(de)一(yi)種手段,歸根到(dao)底(di)它還是一(yi)種阻(zu)(zu)(zu)燃(ran)(ran)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan),其所能達到(dao)的(de)(de)高(gao)阻(zu)(zu)(zu)燃(ran)(ran)級別(bie)也是A類(lei)。因(yin)此(ci),不能把阻(zu)(zu)(zu)燃(ran)(ran)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)叫做'隔(ge)(ge)氧(yang)(yang)層'電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan),而(er)只(zhi)能說'隔(ge)(ge)氧(yang)(yang)層'電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)是一(yi)種阻(zu)(zu)(zu)燃(ran)(ran)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)。伴(ban)隨(sui)著(zhu)人(ren)們安全防范意識(shi)的(de)(de)提(ti)升(sheng),阻(zu)(zu)(zu)燃(ran)(ran)性(xing)、阻(zu)(zu)(zu)燃(ran)(ran)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)愈來(lai)愈多(duo)(duo)的(de)(de)被(bei)廣泛運用到(dao)我們的(de)(de)日(ri)常(chang)生活中(zhong)(zhong),很多(duo)(duo)人(ren)對(dui)二者的(de)(de)定義(yi)辨別(bie)不清,盡管全是礦物絕緣(yuan)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan),但差別(bie)還是非常(chang)大的(de)(de)。此(ci)外大伙兒要留(liu)意阻(zu)(zu)(zu)燃(ran)(ran)性(xing)、阻(zu)(zu)(zu)燃(ran)(ran)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)也有一(yi)般和(he)阻(zu)(zu)(zu)然之(zhi)分(fen),因(yin)此(ci)購買時(shi)一(yi)定要弄清楚是否阻(zu)(zu)(zu)然電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線,如粵佳(jia)信電(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)的(de)(de)阻(zu)(zu)(zu)然低煙(yan)無鹵(lu)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)阻(zu)(zu)(zu)燃(ran)(ran)性(xing)、防火(huo)(huo)銅芯高(gao)密度(du)(du)聚乙烯(xi)絕緣(yuan)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan),在點燃(ran)(ran)時(shi)沒有很多(duo)(duo)濃(nong)煙(yan)的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線。當(dang)火(huo)(huo)災事故產生時(shi),擴散速度(du)(du)比較慢(man),煙(yan)濃(nong)度(du)(du)值低,能見度(du)(du)高(gao),有害物質釋放出來(lai)量小,有利于工作人(ren)員撤出。
為實(shi)現(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)阻燃或提(ti)高電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)阻燃級別(bie),人們研制開發出擠包所謂'隔(ge)氧層(ceng)(ceng)'或'隔(ge)火(huo)層(ceng)(ceng)'作為填(tian)充(chong)或繞包隔(ge)火(huo)阻燃包帶(隔(ge)火(huo)層(ceng)(ceng))等新型結構的(de)(de)阻燃電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan),并把(ba)這(zhe)種(zhong)(zhong)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)叫做(zuo)'隔(ge)氧(火(huo))層(ceng)(ceng)'電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)。其主要(yao)原理(li)是(shi)在材(cai)料中(zhong)添(tian)加了金(jin)屬水合(he)物(wu)成份,也可分別(bie)實(shi)現(xian)(xian)低(di)(di)鹵(lu)低(di)(di)煙、無(wu)鹵(lu)低(di)(di)煙和電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)阻燃化。但(dan)是(shi),所謂'隔(ge)氧層(ceng)(ceng)'和'隔(ge)火(huo)層(ceng)(ceng)'只(zhi)是(shi)實(shi)現(xian)(xian)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)阻燃的(de)(de)一(yi)種(zhong)(zhong)手段,歸(gui)根到底它還是(shi)一(yi)種(zhong)(zhong)阻燃電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan),其所能(neng)(neng)達到的(de)(de)高阻燃級別(bie)也是(shi)A類(lei)。因此,不能(neng)(neng)把(ba)阻燃電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)叫做(zuo)'隔(ge)氧層(ceng)(ceng)'電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan),而(er)只(zhi)能(neng)(neng)說'隔(ge)氧層(ceng)(ceng)'電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)是(shi)一(yi)種(zhong)(zhong)阻燃電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)。
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