CN102926657A - Anti-blocking method for hydraulic propulsion circuit of rock drilling machine and rotary circuit in series connection - Google Patents

Abstract

The invention discloses an anti-blocking method for a hydraulic propulsion circuit of a rock drilling machine and a rotary circuit in series connection. The method comprises the following steps: firstly, arranging an anti-blocking circuit comprising an impactor, a propulsion motor and a rotary motor, wherein an oil way of the impactor is connected with an impacting propulsion pump, a pressure reducing value is arranged outside the propulsion motor, and the rotary motor is connected with a rotary valve; and arranging an anti-blocking valve between the propulsion motor and the rotary motor, wherein the propulsion circuit is that pressure oil of a pump are depressurized to go into a forwarding oil-taking cavity of the propulsion motor, and return oil of the propulsion circuit and the pressure oil of the pump are combined to go into the rotary motor, thus rotary pressure become backpressure, propulsion and rotation of the propulsion motor, thereby forming a series circuit. The method provided by the invention has the beneficial effects of solving drilling-blocking problem advantageously, ensuring normal drilling operation of the rock drilling machine, improving production efficiency, strengthening movement accuracy of the rock drilling machine and reducing wear degree favorably, prolonging the service life and assisting the stress of the body of the rock drilling machine.

Description

Connect with rotary loop and prevent chucking method in a kind of rock cutter machine hydraulic drive loop

Technical field

The present invention relates to the hydraulic technique field, relate in particular to a kind of rock cutter machine hydraulic drive loop and connect with rotary loop and prevent chucking 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, and work poor efficiency, weight of equipment are heavier, high expensive.

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, auxiliary rock cutter machine hydraulic drive loop of improving the equipment operation ability connect with rotary loop and prevents chucking method, with many deficiencies of solution prior art.

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

Connecting with rotary loop and prevent chucking method in a kind of rock cutter machine hydraulic drive loop, mainly is comprised of following:

⑴ at first arrange the anti-sticking loop, comprises by impactor, propulsion motor and rotary motor forming, and impactor oil circuit wherein connects one and impacts boost pump, reducing valve of propulsion motor outer setting wherein, and rotary motor wherein connects a revolving valve;

⑵ arrange the anti-sticking valve between propulsion motor and rotary motor, advance the loop after decompression, to be entered the forward oil suction chamber of propulsion motor by the pressure oil of pump, the pressure oil merging of its oil return and pump enters rotary motor, make rotation pressure become back pressure, propelling and the revolution of propulsion motor, consist of series loop;

⑶ when rotation pressure raise, the input pressure of propulsion motor was set up constant by reducing valve, and propulsion motor reduces to make to advance into and out of pressure differential between hydraulic fluid port and slows down;

⑷ when bit freezing occurs, regulate the set pressure that rotation pressure is elevated to the anti-sticking valve, the anti-sticking valve events makes to advance the oil circuit off-load, and simultaneously, propulsion motor reverses under the force feed effect of pump, makes the hammer drill rollback;

⑸ eliminate when bit freezing, regulates rotation pressure and drop to the set pressure that is lower than the anti-sticking valve, and the anti-sticking valve resets.

The rock of the present invention cutter machine hydraulic drive loop beneficial effect of preventing chucking method of connecting with rotary loop 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

Connect with rotary loop and prevent chucking method in the described rock cutter of embodiment of the invention machine hydraulic drive loop, its key step comprises:

⑴ at first arrange the anti-sticking loop, comprises by impactor, propulsion motor and rotary motor forming, and impactor oil circuit wherein connects one and impacts boost pump, reducing valve of propulsion motor outer setting wherein, and rotary motor wherein connects a revolving valve;

⑵ arrange the anti-sticking valve between propulsion motor and rotary motor, advance the loop after decompression, to be entered the forward oil suction chamber of propulsion motor by the pressure oil of pump, the pressure oil merging of its oil return and pump enters rotary motor, make rotation pressure become back pressure, propelling and the revolution of propulsion motor, consist of series loop;

⑶ when rotation pressure raise, the input pressure of propulsion motor was set up constant by reducing valve, and propulsion motor reduces to make to advance into and out of pressure differential between hydraulic fluid port and slows down;

⑷ when bit freezing occurs, regulate the set pressure that rotation pressure is elevated to the anti-sticking valve, the anti-sticking valve events makes to advance the oil circuit off-load, and simultaneously, propulsion motor reverses under the force feed effect of pump, makes the hammer drill rollback;

⑸ eliminate when bit freezing, regulates rotation pressure and drop to the set pressure that is lower than the anti-sticking valve, and the anti-sticking valve resets.

Claims (1)

1. connect with rotary loop and prevent chucking method in a rock cutter machine hydraulic drive loop, it is characterized in that, mainly is comprised of following steps:

⑴ at first arrange the anti-sticking loop, comprises by impactor, propulsion motor and rotary motor forming, and impactor oil circuit wherein connects one and impacts boost pump, reducing valve of propulsion motor outer setting wherein, and rotary motor wherein connects a revolving valve;

⑵ arrange the anti-sticking valve between propulsion motor and rotary motor, advance the loop after decompression, to be entered the forward oil suction chamber of propulsion motor by the pressure oil of pump, the pressure oil merging of its oil return and pump enters rotary motor, make rotation pressure become back pressure, propelling and the revolution of propulsion motor, consist of series loop;

⑶ when rotation pressure raise, the input pressure of propulsion motor was set up constant by reducing valve, and propulsion motor reduces to make to advance into and out of pressure differential between hydraulic fluid port and slows down;

⑷ when bit freezing occurs, regulate the set pressure that rotation pressure is elevated to the anti-sticking valve, the anti-sticking valve events makes to advance the oil circuit off-load, and simultaneously, propulsion motor reverses under the force feed effect of pump, makes the hammer drill rollback;

⑸ eliminate when bit freezing, regulates rotation pressure and drop to the set pressure that is lower than the anti-sticking valve, and the anti-sticking valve resets.