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武汉冶金安全技术研究所,大冶铁矿与长沙防护用品厂协作,最近试制成功矿用充气式球型密闭装置。矿用充气式密闭装置,采用特制强力人造革或厚膜塑料制成。结构为圆球型。球径大小视矿井巷道断面尺寸而定。目前已制成直径3.5米和5.0米两种。球内充以压力为5～30毫米水柱的空气,即能工作。自重约28公斤(直径3.5)～57公斤(直径5.0米)。充气、泄气时间一般需10～20分钟。经井下试用表明,对井巷风流的密闭性能良好。
Wuhan Metallurgical Institute of Safety Technology, Daye Iron Mine and Changsha Protective Products Factory collaboration, the successful trial of mining inflatable ball-type closed device. Mine inflatable sealed device, using a special strong artificial leather or thick plastic. The structure is spherical. Ball size depends on mine tunnel section size. Has been made of 3.5 meters in diameter and 5.0 meters two. The ball filled with air pressure of 5 to 30 mm of water, that is, work. Weigh about 28 kg (diameter 3.5) ~ 57 kg (5.0 meters in diameter). Inflatable, deflated time generally takes 10 to 20 minutes. After the downhole trial showed that the well closed air flow of good performance.