Drill stem with internal powder discharging function
A drill rod and short rod technology, applied in drill rods, drill bits, drill pipes, etc., can solve the problems of difficult drilling, rock powder retention in holes, blocked rock cutting forms and powder discharge forms, etc. Work efficiency, reduce labor intensity, and improve the effect of porosity
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[0026] Such as Figure 1~Figure 5 As shown, a powder-draining drill pipe includes a front section, a rear section and a drill bit. The middle of the drill pipe is hollow. The head of the front section of the drill pipe 3 is provided with a tapered internal thread 4, and the tail is provided with a tapered external thread. The center hole of the front section of the drill pipe is uniformly provided with nozzles 5, the nozzle 5 is arranged obliquely, and the nozzle 5 is installed corresponding to the water hole 8 provided inside the drill pipe, and the center of the water hole 8 is arranged parallel to the center line of the drill pipe; The drill rod includes several short rods 7 with the same structure. The head of the short rod 7 is provided with a tapered internal thread, and the tail is provided with a tapered external thread 10. The short rods are connected by tapered threads, and the adjacent short rods are connected A sealing ring 6 is provided at the sho...
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