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BF—3L 型防坠器是在 JS 型防坠器的基础上,结合荊各庄矿副井提升设备的具体情况,由抚顺煤炭研究所与开滦矿务局共同合作研制而成的一种新型防坠器。它是一种适用于端面槽钢组合罐道,单绳提升3t 双层罐笼,轻便可靠的防坠器。该防坠器于1981年1月安装试验完后交付矿井正式使用,经井口试验和8个多月的工业运转后,该防坠器于10月召开了技术总结评议会,在会上受到了肯定与好评。该防
BF-3L-type anti-dropping device is based on the JS-type anti-dropping device, combined with Jinggezhuang mine shaft auxiliary equipment to enhance the specific circumstances, developed by the Fushun Coal Institute and Kailuan Mining Bureau jointly developed a New anti-dropping device. It is a combination of the end channel channel for the tank, single rope lifting 3t double cage, lightweight and reliable anti-dropping device. The anti-dropping device was delivered to the mine for formal use after the installation test was completed in January 1981. After a wellhead test and more than eight months of industrial operation, the anti-dropping device held a technical review meeting in October and was held at the conference Positive and praise. The defense