Efficient down-hole hammer
A down-the-hole impactor, a high-efficiency technology, is applied in drilling equipment, earthwork drilling, and driving devices for drilling in boreholes. Ensure high efficiency and stability, small shaft diameter change, and few holes
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[0028] Such as figure 1 As shown, a high-efficiency down-the-hole impactor includes a rear joint 1, a check valve 3, a valve rod 9, a piston 11, a cylinder 12, a snap ring 14, a drill bit 15 and a front joint 16. The check valve It is a one-way valve, which includes a valve seat 5, a spring 4, and a steel washer 6. The piston is a slender piston with holes. A positioning sleeve 19 is provided at the rear end of the valve end cover. An anti-vibration rubber ring 20 is clamped inside the positioning sleeve together. The steel gasket 6 is fixed between the rear joint 1 and the valve seat 5.
[0029] Preferably, the rear end of the snap ring is provided with a guide sleeve 21 between the piston and the cylinder. An O-ring 23 is provided on the mating surface of the guide sleeve and the cylinder. An O-shaped sealing ring 13 is provided on the mating surface of the snap ring and the cylinder body; an O-shaped sealing ring 18 is provided on the mating surface of the cylinder body an...
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