有網友(you)說(shuo),只(zhi)要是防爆電(dian)動葫蘆就(jiu)能用于有防爆要求的場(chang)所,這句話對(dui)(dui)但不完全對(dui)(dui)。為什么這么說(shuo)呢?
爆(bao)(bao)炸危(wei)險場(chang)(chang)所(suo)當然(ran)要(yao)選(xuan)(xuan)用(yong)(yong)(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)電動(dong)(dong)葫蘆(lu)(lu)設(she)(she)備(bei)(bei),但(dan)并不(bu)是(shi)(shi)(shi)任意(yi)(yi)選(xuan)(xuan)用(yong)(yong)(yong)(yong)一種(zhong)防(fang)(fang)(fang)爆(bao)(bao)電動(dong)(dong)葫蘆(lu)(lu)都(dou)行,有些人看到電動(dong)(dong)葫蘆(lu)(lu)外殼上(shang)有防(fang)(fang)(fang)爆(bao)(bao)標(biao)志(zhi)(zhi),就認為(wei)(wei)萬無一失了,而忽略了防(fang)(fang)(fang)爆(bao)(bao)標(biao)志(zhi)(zhi)上(shang)的(de)(de)字(zi)母和符(fu)號所(suo)代表的(de)(de)意(yi)(yi)義(yi)。這(zhe)樣(yang)做有可能將低標(biao)準的(de)(de)防(fang)(fang)(fang)爆(bao)(bao)電動(dong)(dong)葫蘆(lu)(lu)錯用(yong)(yong)(yong)(yong)在爆(bao)(bao)炸危(wei)險程度較高的(de)(de)場(chang)(chang)所(suo),埋下事故隱患。其實(shi)不(bu)同的(de)(de)爆(bao)(bao)炸危(wei)險區域(yu),對(dui)防(fang)(fang)(fang)爆(bao)(bao)電動(dong)(dong)葫蘆(lu)(lu)有不(bu)同的(de)(de)型(xing)(xing)式(shi)、級(ji)別(bie)(bie)和組別(bie)(bie)要(yao)求(qiu),這(zhe)一點在設(she)(she)計(ji)上(shang)都(dou)有明確規定,只(zhi)要(yao)拿防(fang)(fang)(fang)爆(bao)(bao)標(biao)志(zhi)(zhi)中的(de)(de)內容與(yu)設(she)(she)計(ji)規定一對(dui)照就可知道(dao)該(gai)設(she)(she)備(bei)(bei)使用(yong)(yong)(yong)(yong)時能否達到防(fang)(fang)(fang)爆(bao)(bao)要(yao)求(qiu)。凡是(shi)(shi)(shi)低于(yu)(yu)(yu)(yu)設(she)(she)計(ji)規定的(de)(de),絕(jue)對(dui)不(bu)能使用(yong)(yong)(yong)(yong)。例如,某場(chang)(chang)所(suo)設(she)(she)計(ji)選(xuan)(xuan)用(yong)(yong)(yong)(yong)的(de)(de)防(fang)(fang)(fang)爆(bao)(bao)電動(dong)(dong)葫蘆(lu)(lu)防(fang)(fang)(fang)爆(bao)(bao)標(biao)志(zhi)(zhi)為(wei)(wei)dII CT4,d是(shi)(shi)(shi)型(xing)(xing)式(shi),說(shuo)明是(shi)(shi)(shi)隔爆(bao)(bao)型(xing)(xing);II是(shi)(shi)(shi)類別(bie)(bie),說(shuo)明是(shi)(shi)(shi)工廠用(yong)(yong)(yong)(yong)的(de)(de)電氣設(she)(she)備(bei)(bei),C是(shi)(shi)(shi)級(ji)別(bie)(bie),表示(shi)可用(yong)(yong)(yong)(yong)于(yu)(yu)(yu)(yu)C級(ji)防(fang)(fang)(fang)爆(bao)(bao)區域(yu);T4是(shi)(shi)(shi)組別(bie)(bie),說(shuo)明適(shi)用(yong)(yong)(yong)(yong)于(yu)(yu)(yu)(yu)最高表面(mian)溫度是(shi)(shi)(shi)T4組的(de)(de)物質。若(ruo)在該(gai)場(chang)(chang)所(suo)中選(xuan)(xuan)用(yong)(yong)(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)標(biao)志(zhi)(zhi)為(wei)(wei)dI或(huo)dII CT2的(de)(de)防(fang)(fang)(fang)爆(bao)(bao)電氣設(she)(she)備(bei)(bei)。由(you)于(yu)(yu)(yu)(yu)前類I屬于(yu)(yu)(yu)(yu)煤礦(kuang)用(yong)(yong)(yong)(yong)電氣設(she)(she)備(bei)(bei),后者T2組別(bie)(bie)低于(yu)(yu)(yu)(yu)T4組別(bie)(bie),因此都(dou)達不(bu)到設(she)(she)計(ji)的(de)(de)防(fang)(fang)(fang)爆(bao)(bao)要(yao)求(qiu),不(bu)能使用(yong)(yong)(yong)(yong)。若(ruo)選(xuan)(xuan)用(yong)(yong)(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)標(biao)志(zhi)(zhi)為(wei)(wei)dII CT6的(de)(de)設(she)(she)備(bei)(bei),由(you)于(yu)(yu)(yu)(yu)T6組別(bie)(bie)高于(yu)(yu)(yu)(yu)T4,因為(wei)(wei)可以使用(yong)(yong)(yong)(yong)。
可見,防爆(bao)電動葫(hu)蘆(lu)雖說能用在(zai)各種防爆(bao)場所,但是也有類(lei)型(xing)和(he)級(ji)別(bie)限制,因此(ci)我(wo)們(men)選(xuan)購時(shi)務(wu)必要了解使用場所的(de)特性,來選(xuan)擇合適類(lei)型(xing)級(ji)別(bie)的(de)防爆(bao)電動葫(hu)蘆(lu)。
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