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管道阻火器結(jié)構(gòu)特點(diǎn)及工作原理

更新時(shí)間：2011-09-13

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管道阻火器結(jié)構(gòu)特點(diǎn)及工作原理 
管道阻火器主要由殼體和濾芯兩部分組成。殼體采用兩個(gè)喇叭形結(jié)構(gòu)為一體的不銹鋼或碳鋼材料，應(yīng)具有足夠的強(qiáng)度承受爆炸產(chǎn)生的沖擊壓力。閥體中間帶有不銹鋼或銅鎳合金材料壓制而成的波紋阻火芯，濾芯是阻止火焰?zhèn)鞑サ闹饕獦?gòu)件，常用的有金屬網(wǎng)濾芯和波紋型濾芯兩種。金屬網(wǎng)型濾芯用直徑0.23~0.315mm的不銹鋼或銅網(wǎng)，多層重疊組成。波紋型阻火層有兩種組成形式：一是由兩個(gè)方向折成的波紋型的薄板材料組成，波紋之間分隔成許多小的孔隙和通道，給火焰提供了一條曲曲折折的通道。另一種由波紋薄板和平板交替纏繞在中心軸上，組成一疊帶有三角形孔隙阻火層，這種結(jié)構(gòu)的阻火層可以根據(jù)設(shè)計(jì)需要生產(chǎn)不同直徑、不同厚度和不同孔隙的波紋阻火層。波紋型濾芯用不銹鋼、銅鎳合金、鋁或鋁合金支撐。波紋型阻火器能組織爆燃的猛烈火焰，并能承受相應(yīng)的機(jī)械和熱力作用，流動阻力小，易于清洗和更換。本閥結(jié)構(gòu)合理、外形美觀、重量輕，便于安裝、檢修、拆卸，可適用輸送可燃性氣體的管道上連續(xù)13次以亞音速火焰試驗(yàn)，每次都能阻止火焰的通過。水壓在2.4MPa壓力下無滲漏。 

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