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Litian Heavy Industry Machinery Co., Ltd.
Litian Heavy Industry Machinery Co., Ltd.

Important Parts And Working Principle Of Hydraulic Rock Drill

1. Hydraulic Rock Drill Parts

(1). Drill bit: This is the tip of the rock drill. It contacts the ground first in drilling operations. It is a component that directly works on the rock.


(2). Drill Rod: the hydraulic rock drill mainly uses threaded drill rod, which includes extension drill rod, extension drill rod, and MF drill rod. The drill rod is characterized in that the shank adapter, drill rod, coupling sleeve and drill bit are connected into a set of drilling tools through the threads on the drill rod body. The basic requirements of the connecting thread of the drill tool string are tight connection, good energy transfer effect, strong wear resistance, easy disassembly, and so on.


(3) . Coupling sleeve: during drilling, the coupling sleeve is located at the joint of the whole set of drilling tools and is subject to corrosion effects such as axial tension and pressure, bending and torsion, contact, and friction.


(4). Shank adapter: shank adapter is an important part of drilling tool. When it works, it directly bears the high-frequency impact and strong torsional force of the drill bit, and transmits the impact force of the plunger movement from the shank adapter to the drill rod and drill bit for rock drilling.


2. Working Principle of Hydraulic Rock Drills

(1). The hydraulic oil enters the lower end of the plunger from the high-pressure oil source to push the plunger upward;


(2). When the plunger rises, it will push the valve sleeve upward to a fixed position, so that the high-pressure oil can be supplied to the cavity through the calibration oil port between the valve sleeve and the plunger. At the same time, the diaphragm of the nitrogen accumulator also compresses nitrogen upward to store energy;


(3). When the liquid pressure at the upper end of the plunger exceeds the liquid pressure at the lower end, the imbalance of force will cause the plunger to accelerate downward movement, and the accumulator provides the oil required for rapid movement. When moving downward, the plunger opens the orifice and lowers the valve sleeve. The plunger continues to move downward until it hits the crushing tool;


(4). During the downward movement of the valve sleeve, cut off the oil supply to the cavity and connect it with the low-pressure oil return circuit to return the whole process to the initial position. This cycle enables it to strike automatically and continuously.


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