Development of fast tripping device for coal mine tunnel drilling rig

According to the problems of long time consumption, high labor intensity and low degree of mechanization in the tripping process of coal mine tunnel drilling rig, a fast tripping device for coal mine tunnel drilling rig is developed. The paper introduces the scheme formulation of rapid tripping device, and describes in detail the design process of clamping support device, hoisting device and drill pipe frame. The process flow of fast tripping out and fast tripping in is briefly described. In the industrial test, the total tripping footage of the fast tripping device is 15 624 m. The tripping speed is about 3.3 times that of a single drill pipe. The device has reliable performance, stability and high efficiency, and meets the functional requirements of rapid tripping in the process of drilling construction.