SU1528903A1 - Dust-suppressing arrangement for rock drills - Google Patents

Abstract

The invention relates to the mining industry and can be used to control dust when drilling blastholes. The purpose of the invention is to increase the reliability of the operation by eliminating the clogging of fines and sludge. For this, the device is provided with a dust receptacle, a vertically mounted nozzle (P) 5, made with a constriction in the lower part, and an angular fairing 6, having openings 7 for the passage of the drill rod and the bit. The fairing 6 is positioned with the tip towards the narrowed part of P 5 and separates the dust receiver along the plane of symmetry with the formation of the lower and upper cavities. The latter are communicated via a tangential channel 10 with a dust-relief chamber 11. It is made with a slit 13 along the bottom 12 and have a bump 14. The nozzles are placed along the axis of the chamber 11 and are directed towards its exit. The distance from each nozzle to the outlet is determined by the formula. With the possibility of purging in the direction of the exit from the chamber, a ventilator is installed. Due to the spin in chamber 11 of the drill, fines are concentrated near the walls, and dust suspended in the air occupies its cavity. Burov trifle through the slit 13 gets on the bump stop 14 and is led out of the chamber 11 into the space between the bottom 12 and the ground, where it is picked up by the jet of the fan and transported in the direction to the outlet of the chamber. 3 il.

Description

A fan is installed on the outlet from the chamber. Due to the spin in chamber II of the drill, fines are concentrated against the walls, and the dust suspended in the air occupies its cavity. Burov trifle across the shelf 13

enters the baffle 14 and is withdrawn from the chamber 1I into the space between the bottom 12 and the soil, where it is picked up by the jet of the fan and transported in the direction to the outlet of the chamber. 3 il.

The invention relates to the mining industry and can be used to control dust in drilling pits of blastholes in open pits with roller cone drilling machines.

The purpose of the invention is to increase the reliability of the device operation by eliminating the clogging of mud and sludge by drilling.

FIG. 1 shows a dust-gouging device for drilling rigs, general view; in fig. 2 is a section A-A in FIG. 1; Fig 3 - top view of the device

The device consists of a dust receptacle 2 enclosing the drill rig I, which, by means of a lifting-lowering mechanism, is attached by the shank 3 to the frame of the drill rig, tapered to the inlet 4 of the vertical pipe 5, corner cone 6 with hole 7 for the drill rod and chisel, lower and upper cavities. ; with outlets 8.9 to the input tangential channel 10 of the dust suppression chamber 1I, provided along the bottom 12 with a slit 13 with a burglar 14, nozzles 15 directed to the outlet of the chamber 16, seals 17, 18, rims 19 with a hole for the drill rod and chisel, valve of the torus 20 of the anchor fixed pivotally on the frame of the machine with the possibility of moving its exit hole along the arc up and down between the soil and the frame of the machine.

The figures also show the air patterns 21 of the fan 20.

The nozzles are located on the axis of the chamber and are directed to the exit from it; the Pb1 distance from each nozzle to the exit is determined by the formula

L

R

tg ()

+ L, m.

where L is the distance from the nozzle to the exit from the dust suppression chamber, m;

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R is the radius of the dust suppression chamber, m;

oL - root angle of the nozzle torch, degree;

L is the empirically determined distance from the exit from the dust suppression chamber, at which the conclusion of the drilling fines through the slot with the striker is completed, m The device works as follows.

An annular flow, which removes the products of destruction from the well, through the inlet 4 and the vertical nozzle narrowed to this opening.

5 runs on corner fairing

6i is divided into main and auxiliary streams. The main stream, remaining in the lower cavity of the dust receiver 2, located under the corner fairing 6, is divided into two parts, each of which through outlet 8 and the input tangential channel 10 is directed to its chamber

11 of the suppression pressure, the auxiliary flow through the opening 7 in the corner fairing 6 penetrates from the lower cavity of the dust receiver 2 into the upper cavity and when meeting with the lid 19 due to the ejecting influence at outlet 8 from the flow side from the lower cavity, also divided into two parts. Each part through output 9 and input tangential channel 10 is directed to its own pressure suppression chamber 11.

Due to the twist in each chamber of dust suppression of the drill, fines are concentrated near the walls, and the dust suspended in the air occupies its cavity. The drill fines, through the slit 13 in the bottom 12 of the pressure suppression chamber 11, gets onto the baffle 14 and are thus led out of the chamber into the space between the bottom 12 and the ground (the plane of the inlet 4), where it is picked up by the stream 21 of the blower fan 20 and transported along

the bottom towards the exit from the chamber 16 of dust suppression; Moreover, the bump stop 14 prevents the accumulation of drilling fines beyond the vertical pipe 5 narrowed to the inlet A, i.e. in the area not blown by the blower fan 20.

The air with remaining dust is treated with wetting agents by means of nozzles 15 directed to the exit from the dust suppression chamber 16. After leaving the chamber, droplets of wetting agents with trapped dust particles begin to settle, are picked up by a stream of 21 blowing and dispersed on the soil together with the drilling detail, covering Moreover, the arrangement of the nozzles p in accordance with the proposed formula allows avoiding the meeting of droplets with the drill trifle 6 with the dust suppression chamber 11 and, thus, accumulation of cuttings, and the installation of veins The venting tiller 20 with the ability to purge the space between the plane of the inlet 4 and the bottom 12 of the dust suppression chamber 11 along its entire length towards the exit from the chamber 16 does not allow the bed to accumulate and block the chamber.

Thus, the reliability of the proposed device in comparison with the known increases and ease of operation, too, since there is no need to remove the sludge manually.

The presence of an outlet 9 from the upper cavity of the dust receiver 2 to the input tangential channel 10 also contributes to an increase in the reliability of operation of the device, since it reduces the likelihood of leakage through the seal 17.

When the machine is moved to another well, the ventilator fan 20 and the dust receiver 2, by the shank 3, are raised to the machine frame with the appropriate mechanisms, which also increases the convenience in operating the proposed device.

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A dust suppression device for drilling machines, including a dust receiver, a seal, a cover with an opening for a drill stand and a chisel, a dust suppression chamber with bottoms and nozzles for supplying wetting agents and a blower fan, characterized in that, in order to improve reliability, by eliminating blockage drilling drill and slit, it is equipped with a vertically mounted pipe, made with a narrowing in the lower part, and angular fairing, made with a hole for the passage of the drill rod and the bit, and the fairing The spruce is placed with the tip in the direction of the narrowed part of the vertical nozzle and separates the dust receiver along the plane of symmetry with the formation of the lower and upper cavities, with both cavities communicating through tangential channels with the dust suppression chamber, the dust suppression chamber being made with a slit along the bottom and fitted with a baffle, and the nozzles are placed along the axis of the dust suppression chamber and directed to its exit, the distance from each nozzle to exit L being determined by the formula

L

R

, -os)

+ L, m.

ei l

where R is the radius of the dust suppression chamber, m;

root angle of a torch of a nozzle, hail;

the distance from the exit from the dust suppression chamber, at which the removal of the drilling fines through the slot with the bump stop, determined experimentally, m; at the same time, the ventilating fan is installed with the possibility of purging in the direction to the exit from the chamber.

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Claims (1)

Claim Dust suppression device for drilling rigs, including a dust collector, a seal, a cover with an opening for a drill stand and chisels, dust suppression chambers with bottoms and nozzles for supplying wetting agents and a blower fan, characterized in that, in order to increase operational reliability by eliminating clogging of the drill trifle and sludge, it is equipped with a vertically mounted pipe made with a narrowing in the lower part, and a corner cowl made with an opening for the passage of the drill stand and bit, and the cowl p is mixed with the tip towards the narrowed part of the vertical pipe and separates the dust collector along the plane of symmetry with the formation of the lower and upper cavities, while both cavities are communicated through tangential channels with a dust suppression chamber, the dust suppression chamber made with a slit along the bottom and equipped with a chipper, and nozzles are placed along the axis dust suppression chamber and directed to its exit, and the distance from each nozzle to the exit L is determined by the formula R L = ----- + D, m, where R is the radius of the dust suppression chamber, m; <4 - root angle of the nozzle plume, deg; 4 - distance from the exit from the dust suppression chamber, at which the withdrawal of drill trifle from it through a slot with a chipper is completed, which is determined empirically, m; while the blower is installed with the possibility of purging towards the exit from the chamber. Fig.Z