Graded braking impact device and rock drill

• Main Authors: TIAN XIANG, XI WEIHANG, CAO XINGYU, ZHANG CHICHEN, LI JIAMING, WANG SONGYUAN
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2023
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

The graded braking impact device comprises a shell, a cylinder sleeve, a reversing valve and a piston, the piston and the reversing valve are coaxially arranged in the cylinder sleeve, a plurality of pressure equalizing grooves are formed in the inner wall face of the cylinder sleeve, the cylinder sleeve is installed in the shell, the shell is provided with an oil inlet main path and an oil return main path, and the oil return main path is communicated with the oil inlet main path. The cylinder sleeve is provided with an oil inlet branch communicated with the oil inlet main path and an oil return branch communicated with the oil return main path, and oil liquid penetrates through the shell and the cylinder sleeve to make contact with the piston and the reversing valve. The impact motion part is mounted in the cylinder sleeve and is not in direct contact with the main shell, so that the service life of the shell is greatly prolonged; the shell only supports the sheath, the oil duct is simple, the processing di