SU1218098A1 - Arrangement for arresting slurry and dust in blasthole drilling - Google Patents

Description

The invention relates to the field of mining and can be used to trap dust when drilling holes and boreholes in rocks.

The purpose of the invention is to increase the efficiency of dust collection by improving the pressure of the device against the hole of the hole and the separation of large fractions of drill cuttings.

The drawing shows a diagram of the device longitudinal section.

The device consists of a clamping swivel coupling 1, made in the form of a cylindrical pipe, inside which a metal brush 2 is rigidly fixed on a cord base 3, and w of elastic elements 4. Elements 4 (wires) of a metal bar 2 are inclined to the axis of the drill rod 5 under angle of 45-65 ° in the direction of its working movement. The optimal size of the angle of inclination of the elastic elements 4 metal w, mesh 2 to the axis of the drill rod 5 and confirmed experimentally.

When mounting the device on the rod 5, the elastic elements 4 of the metal bars 2 interact with the latter. The metal brush 2 is rigidly fixed in the rotary coupling 1 by means of half-rings 6. In addition, the coupling 1 with the ends is placed in the flanges 7, provided with elastic seals 8, metal washers 9 and retaining rings 10.

In the upper part of the device, there is a sealing ring 11, which is connected with a dust-receiving housing 13, made in the form of a truncated cone, through a strap tape 12. At the junction of the dust-collecting body 13 and the sealing ring 11, a dust mite metal grid 14 with a central opening for free passage of the drill rod 5 is rigidly fixed, the sealing rings 11 and the dust mite grid function as a guide apparatus.

At the bottom of the dust receptacle housing 13 is placed a bearing 15 with a seal 16 in contact with the rotary coupling 1. In addition, the dust receptacle housing 13 is equipped with a nozzle 17 for sucking fine fractions of dust and dirt using an ejector or fan (not shown).

The operation of the device is as follows.

Before starting drilling, the device is put on the drill rod 5 and with a slight pressure of the hand, it moves toward the side to be drilled, it does not reach the last by 30-40 cm. The puncher is turned on and the bottom is started to be drilled. The presence of a gap between the sealing ring 11 and the settled face

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At the beginning of the drilling process, the driller can visually determine a sufficient amount of air supplied to the blowdown, ensuring effective removal of the drilled fines from the hole.

Subsequently, in the course of drilling a drill rod 5, making translational-return movements, constantly contacts with the elastic elements 4 of the metal brush 2. With the working forward movement of the drill rod towards the bottom, its surface along the entire perimeter collides with the elastic elements 4 of the brush 2 at an acute angle (45-65 °), together with the brush 2, the cylindrical nozzle 1, the dust-receiving body 13, the sealing ring 11 and other elements of the device, an impulse of force directed towards the bottom. Due to this force, the device moves along the drilling rig 5 towards the side and reliably presses against the latter for the entire period of the drill pin.

During the return movement of the drilling rod 5, it contacts with the elastic elements 4 of the brush 2 at an obtuse angle, therefore the device does not receive a force pulse in the opposite direction. Thus, in the proposed design of the device not only extinguishes

inertial forces, but the shtangi vibration is also useful. The presence of bearing 15 with seal 16 in the device allows the free rotation of the drill rod 5 together with the cylindrical nozzle 1 and the metal brush 2 attached to it, inside the body 13 and the rubber sealing ring 11 that is fixed relative to the dust receptacle slam mesh breaker 14.

The capture of dust and drilling fines is carried out as follows.

After pressing the device to the bottom of the chest (as indicated) and the beginning of the drilling of the hole, the stream of compressed air at the outlet of the holes in the drill bit (not shown)

directly in the face of the core, it picks up the drilling dust and sludge and directs it all to the mouth of the core in the cavity of the sealing ring 11. Dusty air gets on the sludge dust-collecting net 14, dust and bore trifle hit the cells

mesh 14, resulting in coagulation of dust and its deposition in the form of enlarged fractions in the sealing ring 11. Fine dust fractions are sucked through the nozzle 17 due to the dilution created by the ejector (not shown) in the precipitators. At the end of drilling the hole, the perforator is turned off, the rod 5 with the crown is removed from the hole, and coarse dust and drilling fines are poured out from the sealing ring 11 onto the working soil.

Claims (2)

1. DEVICE FOR DRAINAGE DISCHARGE WHEN DRILLING DRILLS, including dust collector mounted on a drill rod with a sealing ring and a suction nozzle and a clamping rotary clutch, characterized in that, in order to increase the dust collection efficiency due to the improvement of the clamping of the device, the clamping clamp is made to the mouth in the form of a cylindrical pipe with sealing elements at the ends and is equipped with a metal brush installed inside the cylindrical pipe with elastic elements s, wherein the resilient elements of the metal brush are directed at an angle of 45-65 ° to the axis of the drill rod in the direction of working movement to the bottom. 2. The device according to π. 1, characterized in that, in order to separate large fractions of drill cuttings, it is equipped with a dust and sludge breaker mesh, rigidly fixed to the interface of the dust collection case and the sealing ring. QO ABOUT With QO