Adaptive hydraulic circuit and control method for rotary propulsion of hydraulic drilling rig

Abstract

Disclosed are a hydraulic drill rig bit assembling and disassembling rotation and pushing self-adaptive hydraulic loop and a control method thereof. According to the hydraulic drill rig bit assembling and disassembling rotation and pushing self-adaptive hydraulic loop and the control method thereof, a loading sensitive variable pump, a loading sensitive proportional multi-way valve, a jackdrill, a pushing motor or oil cylinder and the like compose a jackdrill rotation and pushing main oil way; a bit assembling and disassembling pilot valve, a logic control module, an adjusting valve group, a pushing assembly, a rotating assembly and the like compose a bit assembling and disassembling self-adaptive control oil way. During bit assembly, the positive rotation speed is adjusted and determined by controlling the flow of the rotating assembly through the first pressure reducing valve of the adjusting valve group, the first hydraulic control reversing valve of the logic control module controls the loading sensitive external control interface LsA1 of the pushing assembly to be connected with the first overflow valve of the adjusting valve group, and the downwards-pushing force is adjusted and determined by the first overflow valve; during bit disassembling, the reverse rotation speed is adjusted and determined by controlling the flow of the rotating assembly through the second reducing valve of the adjusting valve group, the second hydraulic control reversing valve of the logic control module controls the loading sensitive external control interface LsB1 of the pushing assembly to be connected with a second overflow valve, and the upwards-pushing force is adjusted and determined by the second overflow valve. By synchronously coupling pushing pressure control and rotation speed regulation, the hydraulic drill rig bit assembling and disassembling rotation and pushing self-adaptive hydraulic loop and the control method thereof can achieve bit assembling and disassembling rotation and pushing self-adaption and bit achieve smooth and reliable bit assembling and disassembling.

Description

Technical field [0001] The invention relates to an adaptive hydraulic control technology of a hydraulic drilling rig, in particular to an adaptive hydraulic circuit and a control method thereof for rotary propulsion of a hydraulic drilling rig for connecting and unloading brazing. Background technique [0002] The normal working hours of a hydraulic drilling rig can generally be divided into three parts: moving machine positioning, connecting and unloading drills, and rock drilling. %, the proportion is quite large; quickly and smoothly realize the connection and unloading of the drill, and shorten the part of the connection and discharge time, which is very meaningful to improve the comprehensive operation efficiency of the hydraulic drilling rig. [0003] The ideal match between the two actions of turning and pushing when connecting and unloading the brazing is that when connecting the brazing, the rotation is turned forward for 1 turn, and the push is just pushed down by ...

AI Technical Summary

Problems solved by technology

In practical engineering applications, the rotary speed of the rock drill is adjustable. Different rock formation characteristics require different rotary speeds, and the rotary speed will also be affected by the engine speed. Generally, the propulsion speed of the rock drill is not adjusted. The speed is difficult to achieve the above-mentioned ideal matching of the two actions of connecting and unloading, rotating and advancing

When connecting and unloading the drill, if the two actions of rotation and push are not well matched, the thread of the drill tool will be damaged in the slightest, and the thread connection and disconnection of the drill tool will not be realized in severe cases.

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