Anti-airstrike and anti-jamming energy-saving hydraulic system and control method of rock drill

Abstract

The invention discloses a rock drill anti-air strike, anti-jamming energy-saving hydraulic system and a control method, which include a hydraulic pump station, and the hydraulic pump station is connected with a forward feed oil pipe and a reverse feed oil pipe through a feed reversing valve; The hydraulic pump station is connected to the impact oil pipe and the low-pressure impact oil pipe through the impact reversing valve; a first hydraulic control reversing valve is installed on the oil circuit behind the impact oil pipe, and the liquid control end of the first hydraulic control reversing valve passes through The first hydraulic control oil pipe is connected to the forward feed oil pipe, and the first hydraulic control reversing valve is connected to the impact oil cylinder; the forward feed oil pipe is connected to the feed oil cylinder through the first reversing valve and the second reversing valve connected. The hydraulic system controls the impact of the rock drill with the feed pressure, so as to ensure that the rock drill will not run dry, prolong the service life of the equipment, and reduce energy loss.

Description

technical field [0001] The invention belongs to the field of rock drilling equipment, and in particular relates to an anti-airstrike, anti-jamming and energy-saving hydraulic system and a control method for a rock drilling machine. Background technique [0002] At present, the impact, feed and precession systems of most rock drills on the market are independent of each other, and adopt independent hydraulic control systems, so there are the following defects: [0003] (1) When the impact drill bit does not touch the rock formation or the contact force is not enough or there is no normal feed, push the impact control handle, and the impact action of the rock drill will start, which will cause the rock drill to hit empty, that is, the impact at this time is doing Useless work has no effect on rock drilling; if long-term air drilling will cause great damage to the rock drilling machine, shorten the service life of the rock drilling machine, increase construction costs; and also...

AI Technical Summary

Problems solved by technology

[0003] (1) When the impact drill bit does not touch the rock formation or the contact force is not enough or there is no normal feed, push the impact control handle, and the impact action of the rock drill will start, which will cause the rock drill to hit empty, that is, the impact at this time is doing Useless work has no effect on rock drilling; if long-term air drilling will cause great damage to the rock drilling machine, shorten the service life of the rock drilling machine, and increase construction costs; it will also cause loss of kinetic energy

[0004] (2) When the rock drill encounters complex working conditions and is stuck and stops rotating, while the feed function and rotation function are still continuously feeding and rotating in the forward direction, the drill bit of the rock drill will become more and more stuck If it is tight, it will eventually lead to the fracture of the drill bit and the shank tail of the rock drill in the hole, destroying the rock drill equipment, increasing the construction cost, delaying the construction schedule, and reducing work efficiency

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