SU717308A1 - Blasthole-drilling device - Google Patents

Description

one

The invention relates to the mining industry and can be used in the mechanisms of drilling drill boring machines, mainly in hand-held drilling devices of percussive action.

A device for drilling holes is known, including its directional vibrator, one end of which is connected by means of a hinge to the lever of the turning mechanism, and the other slides in directions that are rigidly connected to the device’s body and the turning mechanism, which is a ratchet device with a rim , in which spring-loaded dogs are evenly spaced, in contact with the ratchet bush 1.

A directional vibrator, placed at a certain distance from the surface of the body, creates transverse vibrations. In addition, the device is cumbersome and has a rather large weight.

It is also known a device for drilling holes, including a percussion assembly, having a piston-hammer located in the housing, a drill rotation mechanism, having a ratchet axle with at least two doggies located around its circumference, its drive, the cavities of which are taken from the cavity of a piston-impactor by power lines 2 .. /

However, the device does not provide the possibility of changing the rotational speed, as a result of which the drilling performance decreases with changing the hardness of the rock.

The purpose of the invention is to increase the productivity of drilling in rocks of different hardness.

This is achieved by the fact that the device is equipped with a reversible distributor installed in the power lines connecting the cavities of the power cylinder with the cavities of the impactor piston.

FIG. 1 shows schematically the impact unit and the mechanism for rotating the drill with one 20 pair of cylinders; in fig. 2 - the mechanism of rotation of the drill with two pairs of cylinders.

Claims (2)

The device for drilling bore-holes contains a percussion assembly, in the housing 1 of which a piston-hammer 2 is placed, a drill rotation mechanism consisting of a ratchet box 3 with paws 4 and 5 arranged on its circumference with springs 6 and power cylinders 7 and 8 of the rotation mechanism drive, the rods of which are connected with the dogs 4 and 5. The porshnev and shchtok cavity of the cylinder 8 are connected by force lines to the cavities 9 and 10 of the forward and reverse stroke of the impacting node, respectively. A reversing valve 11 is installed in the power lines. The compressed air for driving the device is supplied via a pneumatic line 12 through the switchgear 13, and the exhaust is carried out through a drain hole in the body 1 of the impactor. The device works as follows. Compressed air from the pneumatic line 12 through the distribution device 13 enters the cavity 9 and at the position I of the distributor 11 - into the piston cavities of the cylinders 7 and 8, and the cavity of the return stroke of the impactor and the rod cavities of the cylinders 7 and 8 at this time communicate with the exhaust, and piston wadrnik 2 makes a working stroke. Cylinders 7 and 8 through the dogs 4 and 5 turn ratchet bush 3 and drill. At the end of the stroke of the piston of the striker 2, the distributor 13 switches, and the compressed air enters the cavity 10 of the shock assembly and the rod end of the cylinders 7 and 8. The forward stroke cavity 9 of the shock assembly and the cylinder pistons 7 and 8 communicate at this time exhaust, and the piston 2 and the cylinders 7 and 8 make a return stroke, while the dogs 4 and 5 do not rotate the ratchet axle box. To increase the speed of the drill bit, the distributor 11 is switched to position I. In this case, the compressed air from the pneumatic line 12 through the distributor 13 enters the cavity 9 directly: the stroke of the impact unit, into the piston cavity of the cylinder 8 and the rod cavity of the 7G cylinder. percussion knot. The piston cavity of the cylinder 8 and the piston cavity of the cylinder 7 are in communication with the exhaust at this time, and the piston piston 2 makes a working stroke. Cylinder 8 rotates the ratchet through the pawl 5 and cylinder 7 reverses. At the end of the working stroke of the impactor piston 2, the distributor 13 switches and the compressed air enters the shock section 10 of the shock section, the rod end of the cylinder 8 and the piston cavity of the cylinder 7. The direction 9 stroke of the shock node, the piston cavity of the cylinder 8 and the rod end cylinder 7 communicates with the exhaust, and the piston-hammer and cylinder 8 reverse, and cylinder 7 turns the ratchet box and drill through the pawl 4. The proposed device allows to increase the productivity of percussion-rotary drilling of bore-holes in rocks of different hardness. The invention of the device for drilling knobs, including a percussion assembly, having a piston-hammer located in the housing, a rotation mechanism of a drill, having a ratchet axle box with at least two pawls located around its circumference, connected to its actuating cylinders, whose cavities are connected with a piston cavity of a striker with power lines, characterized in that, in order to increase the productivity of drilling in rocks of different hardness, it is equipped with a reversible distributor, which are installed in the power lines x cavities of the power cylinder with a piston cavity of the impactor. Information sources,. taken into account during the examination 1. USSR author's certificate No. 207180, cl. E 21 S 1/00, 1966. 2. USSR author's certificate number 567803, cl. E 21 5/00, 1973 (prototype). FIG.