Research of Metering Technology of Pipeline Gas Flow of Coal Mine

Development status of metering technology of pipeline gas flow of coal mine was introduced, and advantages and disadvantages of orifice flowmeter, vortex flowmeter, Pitot tube flowmeter, swirlmeter and V-cone flowmeter were analyzed. Solutions were proposed for the impact of impurities in gas and changes of gas concentration on metering accuracy of gas flow. V-cone flowmeter was advised for main pipe, stem pipe and branch pipe, and inserted flowmeter with multiple-point sampling was advised for confluent pipe and evaluation units. A viewpoint was pointed out that the metering of pipeline gas flow of coal mine should select appropriate flowmeter according to different field conditions, working conditions and metering needs.