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为了更好的帮助煤矿专业人员了解正压与负压束管在气体采样方面的基本性能,从而可以在煤矿自燃火灾监测领域上有更好的应用,设计了2个试验分别测试正压与负压束管长度与采样时间的关系、束管长度与稳定采样流量的关系;然后用2个经验函数拟合了2个试验的相关数据,并且根据拟合的函数对正压与负压束管的性能进行了比较和分析。试验表明,正压输气系统在相同长度下,无论采样时间还是采样流量都大大优于负压输气系统。
In order to better help coal mine professionals to understand the basic performance of positive pressure and negative pressure beam tubes in gas sampling, so that they can be better applied in the field of coal mine spontaneous combustion fire monitoring. Two tests were designed to test positive pressure and negative pressure The relationship between the length of the beam tube and the sampling time, the length of the beam tube and the steady flow rate of the sampling tube were obtained. Then two empirical functions were used to fit the data of two experiments and the positive and negative pressure beam tubes The performance is compared and analyzed. Experiments show that the positive pressure gas transmission system in the same length, regardless of the sampling time or sampling flow are much better than the negative pressure gas transmission system.