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class="art-title">中壓防爆風(fēng)機(jī)的使用環(huán)境有什么規(guī)定</h1> <div id="8juy2ak" class="art-info"> 發(fā)布時(shí)間： 2022-09-26　　點(diǎn)擊次數(shù)： 774次 </div> <div id="8juy2ak" class="art-body"> <div>　　中壓防爆風(fēng)機(jī)的使用環(huán)境有什么規(guī)定：</div><div>　　什么場(chǎng)合使用什么等級(jí)的中壓防爆風(fēng)機(jī)，這個(gè)與危險(xiǎn)場(chǎng)所的級(jí)別相關(guān)，越危險(xiǎn)的地方就越要使用較好的風(fēng)機(jī)</div><div>　　與劃分危險(xiǎn)場(chǎng)所類(lèi)型相關(guān)的因素：危險(xiǎn)場(chǎng)所劃分與現(xiàn)場(chǎng)的多種因素相關(guān)。通常情況下，很難給出危險(xiǎn)場(chǎng)所劃分的明確標(biāo)準(zhǔn)和定義。以下幾個(gè)因素與危險(xiǎn)場(chǎng)所劃分類(lèi)型密切相關(guān)：</div><div>　　1. 可燃性物質(zhì)的物理特性</div><div>　　2. 環(huán)境中的氣體,蒸汽,薄霧及液體的數(shù)量</div><div>　　3. 釋放源的狀態(tài)</div><div>　　4. 通風(fēng)的狀態(tài)</div><div>　　5. 防止氣體，蒸汽,薄霧擴(kuò)散的措施</div><div>　　6. 影響可燃性氣體,蒸汽,薄霧揮發(fā)性的因素</div><div>　　危險(xiǎn)場(chǎng)所劃分根據(jù)爆炸性環(huán)境的頻率和持續(xù)的時(shí)間把危險(xiǎn)場(chǎng)所劃分為不同的區(qū)域。</div><div>　　氣體場(chǎng)所劃分為三個(gè)區(qū)域：0區(qū)，1區(qū)和2區(qū);粉塵場(chǎng)所分為三個(gè)區(qū)域：20區(qū)，21區(qū)和22區(qū)。</div><div>　　可燃性氣體，蒸汽和薄霧氣體場(chǎng)所 0區(qū)(紅色部分) 爆炸性環(huán)境中的爆炸性混合物以氣體，蒸汽或薄霧形式連續(xù)出現(xiàn)或長(zhǎng)時(shí)間存在的場(chǎng)所。使用在0區(qū)的電氣設(shè)備須按照EN50284和IEC60079-26中對(duì)д類(lèi),種類(lèi)(氣體)電氣設(shè)備的有關(guān)規(guī)定進(jìn)行設(shè)計(jì),測(cè)試和標(biāo)識(shí)。</div><div>　　1區(qū)(橙色部分) 在正常運(yùn)行時(shí),爆炸性環(huán)境中可能會(huì)出現(xiàn)氣體,蒸汽或薄霧形式的爆炸性混合物的場(chǎng)所。</div><div>　　1區(qū)是防爆電氣設(shè)備的典型應(yīng)用場(chǎng)所。標(biāo)準(zhǔn)EN50014~ EN50020,EN50039以及IEC60079-0,-1,-2.-7,-11,-18,-25對(duì)1區(qū)場(chǎng)所使用的電氣設(shè)備做了規(guī)定。</div><div>　　2區(qū)(黃色部分) 在正常運(yùn)行時(shí),爆炸性環(huán)境中不太可能出現(xiàn)氣體,蒸汽或薄霧形式的爆炸性混合物,如果出現(xiàn)也只是偶爾發(fā)生并且短時(shí)間存在的場(chǎng)所。</div><div>　　通常情況下,”短時(shí)間”是指持續(xù)時(shí)間不多于2個(gè)小時(shí)。標(biāo)準(zhǔn)EN50021和IEC60079-15對(duì)2區(qū)使用的電氣設(shè)備做了相應(yīng)的規(guī)定，同時(shí)也必須滿(mǎn)足通用的絕緣電阻，沖擊能量和耗散功率等要求。</div><div>　　粉塵場(chǎng)所 20區(qū) EN50281-1-1標(biāo)準(zhǔn)對(duì)用于20區(qū)的電氣設(shè)備殼體結(jié)構(gòu)及設(shè)計(jì)做了相應(yīng)規(guī)定。IEC60241-11對(duì)在20區(qū)使用的電氣設(shè)備做了補(bǔ)充要求，包括本質(zhì)安全防爆等方面的內(nèi)容。20區(qū)應(yīng)用種類(lèi)1(粉塵)電氣設(shè)備。 21區(qū) 磨坊，煤炭，谷物倉(cāng)庫(kù)以及包裝生產(chǎn)線(xiàn)及其周?chē)堑湫偷?1區(qū)場(chǎng)所。</div><div>　　在21區(qū)中，可能會(huì)發(fā)生因粉塵泄漏等原因而形成爆炸性粉塵混合物。此外，電氣設(shè)備表面粉塵堆積也是工廠安全生產(chǎn)的隱患，應(yīng)引起足夠的重視。 21區(qū)須使用種類(lèi)2(粉塵)防爆電氣設(shè)備。</div><div>　　22區(qū) 在正常運(yùn)行時(shí)，爆炸性粉塵混合物不太可能出現(xiàn)，只有在故障狀態(tài)下才可能發(fā)生的場(chǎng)所。22區(qū)須使用種類(lèi)3(粉塵)防爆電氣設(shè)備。如果是爆炸性環(huán)境中的粉塵是導(dǎo)電性粉塵，則依據(jù)EN50281-1-2的規(guī)定，須使用種類(lèi)2(粉塵)防爆電氣設(shè)備。</div> </div> <div id="8juy2ak" class="art-next"> <dl 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