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一、前言 煤层注水是减少煤尘产生量的有效措施之一。随着注水方法的推广与完善,许多国家都研制了煤层注水专用设备及装置,如水泵、钻机、高压水表、封孔器等。 我国对煤层注水防尘方法,已进入了全面推广阶段。但是,煤层注水设备还不完善,尚没有煤层注水专用水表。目前现场所使用的都是耐压强度在10公斤/厘米~2以下的民用水表,而现场的注水压力一般都超过10公斤/厘米~2,有的高达150公斤/厘米~2左右,所
I. Introduction Coal seam water injection is one of the effective measures to reduce the amount of coal dust generated. With the popularization and improvement of water injection methods, many countries have developed special equipment and devices for water injection of coal beds, such as water pumps, drilling rigs, high pressure water meters and plugging machines. China’s coal seam water dust prevention methods, has entered a comprehensive promotion stage. However, coal-bed water injection equipment is not perfect, there is no special water meter for coal injection. Currently used on the site are compressive strength of 10 kg / cm ~ 2 the following civilian water meter, and the scene of the water pressure are generally more than 10 kg / cm ~ 2, and some up to 150 kg / cm ~ 2 or so,