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Structural principle of impactor
Release time:
2019-10-21
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The down-the-hole impactor is composed of a piston, an inner cylinder, a gas seat, a check valve, and drill bit accessories, etc. are installed in a slender outer cylinder. The upper end of the outer cylinder is equipped with an upper joint with a plate opening and a connecting thread. The lower end is equipped with a brazing sleeve for connecting threads. The brazing sleeve is mainly used to transmit propulsion force and rotary motion to the drill bit. The snap ring controls the axial movement of the drill bit, while the check valve is used to prevent debris such as rock slag from entering the impactor when the supply of compressed air is stopped. During the drilling process, the drill bit is pushed into the impactor and pressed against the chuck sleeve, at which time the piston directly impacts the drill bit to drill the rock. When the drill bit is raised from the bottom of the hole, start strong blowing slag discharge.
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