CN102996070A - Automatic anti-blocking method of down-the-hole drill - Google Patents

Abstract

The invention discloses an automatic anti-blocking method of a down-the-hole drill, wherein an anti-blocking circuit, which is composed of a propulsion motor and a rotary motor, is arranged at first; a pressure circuit composed of a reducing valve, a remote pressure regulating valve and a pressure gauge is connected at an oil path region formed by the propulsion motor and a propulsion pump, and a pressure relay and a hydraulic control multitandem valve are orderly connected between the outer part of the rotary motor and a rotary pump; after the pressure relay is mounted in the rotation circuit, the rotation pressure is regulated to control the pressure relay to be on or off; and the propulsion circuit and the rotation circuit both are arranged as independent oil supply structures, respectively. The automatic anti-blocking method is advantageous for solving the drill blocking problem, ensuring normal drilling work of the rock drill and improving the production efficiency, and also has the advantages for improving the machine motion accuracy and reducing the attrition condition, prolonging the service life and assisting the machine body in bearing force and the like.

Description

A kind of down-the-hole type rig automatic anti-blocking method

Technical field

The present invention relates to the hydraulic technique field, relate in particular to a kind of down-the-hole type rig automatic anti-blocking method.

Background technology

Hydraulic system has that power is large, operating pressure and the flow adjustability is good, heat can be brought back the advantages such as fuel tank, adopt hydraulic system to produce more power than other devices, under equal power, the volume of hydraulic means is little, lightweight, power density large, compact conformation.Down-the-hole drill is a kind of engineering machinery of Drilling mineral and rock, be to slip into the direct drill hammer of in the hole and slew gear drives drilling rod rotation to the equipment of Rock penetrating outside the hole by impactor, be mainly used in the rock drilling boring in the various engineering such as surface mine exploitation, building foundation, water conservancy, power station, building materials, traffic and national defense construction; The a kind of of rock drilling machinery, one of rock drilling machinery that at present Drilling big gun hole operation is widely used.Common hammer drill, the characteristics such as boring is dark, bore diameter is large, drilling efficiency is high, applied widely are arranged, impact, propelling, revolution and deslagging are four basic links of down-the-hole drill rock drilling work, its process is for being advanced drilling tool to comprise that successively drilling rod, impactor and drill bit make drill bit and hole bed rock stone closely contact  by impactor drill hammer at intermittence by propulsive mechanism, simultaneously, slew gear makes the drilling tool continuous rotary.Anti-card apparatus is the part of propelling, slew gear; its effect is when bit freezing occurring or bit freezing trend is arranged in the down-the-hole drill rock drilling process; anti-card apparatus can be controlled propelling, rotation pressure respective change; make down-the-hole drill can prevent and process the bit freezing phenomenon; hammer drill often can produce the bit freezing problem in the rock drilling process, affect the work of normally creeping into, the reduction production efficiency of hammer drill.Therefore, hydraulic system should have certain anti-sticking facility that pipe sticking can be got rid of rapidly.But existing hydraulic system assembly exists a lot of problems from method of operating, working method, numerous and diverse different angles such as structure, and this causes work poor efficiency, heavier, the high expensive of weight of equipment.

Summary of the invention

The purpose of this invention is to provide a kind of work of normally creeping into that is conducive to solve the bit freezing problem, guarantees hammer drill, can enhance productivity, reduce labour intensity, assist the down-the-hole type rig automatic anti-blocking method that improves the equipment operation ability, to solve many deficiencies of prior art.

Purpose of the present invention is come specific implementation by the following technical programs:

A kind of down-the-hole type rig automatic anti-blocking method mainly is comprised of following:

⑴ at first, arrange the anti-sticking loop, comprise by propulsion motor and rotary motor and forming, be positioned at pressure circuit that is formed by reducing valve, remote pressure regulating valve and pressure meter of the formed oil circuit joint area of propulsion motor and boost pump, then successively Bonding pressure relay, liquor controlled multipath between rotary motor outside and drum pump;

⑵ after the setting pressure relay, regulate the break-make of passback pressure controlled pressure relay on rotary loop, surpass a certain pressure when rotation pressure raises, during the bit freezing critical pressure, the pressure switch action, thus control advances the reversal valve in loop, makes the propulsive mechanism rollback;

⑶ when rotation pressure drops to when being lower than the critical rotation pressure of bit freezing of setting, and again rock drilling at the bottom of the contact hole of drill bit is set to independent oil supply structure respectively with above-described propelling loop and rotary loop;

⑷ regulate the pressure switch action when the critical rotation pressure of bit freezing, the then solenoid operated directional valve of the propelling control section in banked direction control valves oil supply loop commutation makes hydraulic oil hydraulic control banked direction control valves commutation propulsion motor, propulsive mechanism rollback.

The beneficial effect of down-the-hole type rig automatic anti-blocking method of the present invention is: be conducive to solve the bit freezing problem, guarantee hammer drill the work of normally creeping into, can enhance productivity, be conducive to improve the machine movement precision and reduce abrasion condition, can increase the service life and the auxiliary machine power etc. of experiencing; Simultaneously, be conducive to adapt to the demand of transportation, installation, accent frame, can improve the operation controllability, reduce labour intensity.

The specific embodiment

The described down-the-hole type of embodiment of the invention rig automatic anti-blocking method, its key step comprises:

⑴ at first, arrange the anti-sticking loop, comprise by propulsion motor and rotary motor and forming, be positioned at pressure circuit that is formed by reducing valve, remote pressure regulating valve and pressure meter of the formed oil circuit joint area of propulsion motor and boost pump, then successively Bonding pressure relay, liquor controlled multipath between rotary motor outside and drum pump;

⑵ after the setting pressure relay, regulate the break-make of passback pressure controlled pressure relay on rotary loop, surpass a certain pressure when rotation pressure raises, during the bit freezing critical pressure, the pressure switch action, thus control advances the reversal valve in loop, makes the propulsive mechanism rollback;

⑶ when rotation pressure drops to when being lower than the critical rotation pressure of bit freezing of setting, and again rock drilling at the bottom of the contact hole of drill bit is set to independent oil supply structure respectively with above-described propelling loop and rotary loop;

⑷ regulate the pressure switch action when the critical rotation pressure of bit freezing, the then solenoid operated directional valve of the propelling control section in banked direction control valves oil supply loop commutation makes hydraulic oil hydraulic control banked direction control valves commutation propulsion motor, propulsive mechanism rollback.

Claims (1)

1. a down-the-hole type rig automatic anti-blocking method is characterized in that, mainly is comprised of following steps:

⑴ at first, arrange the anti-sticking loop, comprise by propulsion motor and rotary motor and forming, be positioned at pressure circuit that is formed by reducing valve, remote pressure regulating valve and pressure meter of the formed oil circuit joint area of propulsion motor and boost pump, then successively Bonding pressure relay, liquor controlled multipath between rotary motor outside and drum pump;

⑵ after the setting pressure relay, regulate the break-make of passback pressure controlled pressure relay on rotary loop, surpass a certain pressure when rotation pressure raises, during the bit freezing critical pressure, the pressure switch action, thus control advances the reversal valve in loop, makes the propulsive mechanism rollback;

⑶ when rotation pressure drops to when being lower than the critical rotation pressure of bit freezing of setting, and again rock drilling at the bottom of the contact hole of drill bit is set to independent oil supply structure respectively with above-described propelling loop and rotary loop;

⑷ regulate the pressure switch action when the critical rotation pressure of bit freezing, the then solenoid operated directional valve of the propelling control section in banked direction control valves oil supply loop commutation makes hydraulic oil hydraulic control banked direction control valves commutation propulsion motor, propulsive mechanism rollback.