The downhole impactor is divided into a low wind pressure downhole impactor, a medium pressure downhole impactor and a high wind pressure downhole impactor. It is widely used in metallurgical, coal, chemical, building materials, mining and water conservancy, hydropower, highway, railway, national defense, construction and other engineering hole-forming operations, suitable for dry and blasthole water wet operation, reliable performance It is the ideal drilling hole device for today.
At the beginning of the impact stroke, the piston and the valve plate are in the upper position, and the compressed air enters the upper chamber of the cylinder through the radial holes of the valve cover and the valve seat, and pushes the piston to move downward at high speed to impact the drill bit. When the piston row to the spline groove of the bushing is closed, the pressure in the lower chamber begins to rise, so that the center hole of the upper end of the piston leaves the valve bar, the upper chamber passes through the atmosphere, the pressure is lowered, and the working stroke ends. When the piston hits the tail of the drill bit, the valve piece is reversed due to the upper and lower pressure difference, and the piston repeats the return stroke movement.
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