SU32194A1 - An instrument for determining rock strength or coal in the face - Google Patents

Description

The main author's certificate No. 8484 describes a device intended for determining the strength of coal directly at the place of its extraction, i.e. in the face, in which the drilling method is used for this purpose, i.e. strength is defined as the value is proportional to the work expended on test drilling by a drill of a certain diameter, which, in turn, is proportional to the number of revolutions made at a certain depth of drilling. In the described device, this work is determined by a spring stretched by a torque taking into account this stretching by a counter, for which the latter carries a friction roller on its shaft which is in contact with the friction disk driven for the drill and moved along the radius of the latter by a cranked lever, the second knee of which with the above spring.

407

In the proposed modified device, instead of a crank lever, a differential screw coupling is used, the nut of which is connected to the drive shaft, and the screw is connected to the meter, and the screw is mounted with the possibility of axial movement along the shaft connected with the drilling CTf.

In FIG. 1 depicts the proposed device B longitudinal section; FIG. 2 is a side view of it; FIG. 3 is a bottom view with a cross-section of the body.

In the housing 4 of the proposed device is the drive shaft 5, driven in rotation by the shaft / external drive through a conical pair of gears 2 (Fig. 1). A sleeve .5 is rigidly connected to the shaft. It is rigidly connected to the end of the spring 6, the second end of which, for the purpose of transmitting the rotation and operation, is rigidly connected to gear 10 coupled to the gear 14 of the drill rod 22 of hexagonal section and provided in its upper part with a threaded end for nut cutting gears 20. Lastly coupled to gear 16 of roller 17, which consists of two parts, connected by detachable coupling 18. At the right end of roller 77, gear 16 is also mounted, coupled to pinion 14 of gear 22. Gear We are on the other hand coupled to gear 23, wedged on the shaft 25, on which the screw is mounted with the possibility of axial displacement to 26 of the screw differential nut 24 rigidly connected to the meter counter 30 of the device (Fig. 2). On the counter shaft, a friction roller 57 is fixed, in contact with the friction disk 32, which is rotated from shaft 3 by transmission 8. With gear 8 wedged on shaft 3, cylinder 7 is rigidly connected, covering spring 6 and carrying gear 9 at the end, coupled with gear 23 differential nuts 24.

During drilling, the shaft 7 is rotated, which, through a 2-2-3-5-6-J0-74 gear, rotates the rod 22 with the drill and through the gear 76 -77-nut 20, which, having a greater number of revolutions compared to the rod 22, reports last axial displacement i.e. working feed of the drill in a face. In doing so, through the transmission 3-8, the disk 32 rotates, rotating the roller 57 of the rev counter. The resulting tangential cutting force of the drill creates at the ends of the spring 6, mounted on the gear 7ft and in the sleeve 5, the torque, which, overcoming the elasticity

springs, reports the angular displacement of the sleeve 5 relative to the gear. This angular displacement, as an additional rotation, is transmitted through the transmission 5-7-9-23 to the rotating nut 24, which, ahead in its rotation of the worm to 26, receives rotation from the shaft through the transmission 3-5-6-10-23-25, informs it, like a nut, an axial movement proportional to the force on the spring 6. The worm, moving the roller 31 relative to the disk 32, changes the rotation of the counter 30 by an amount proportional to the spring twisting, which is proportional to the cutting force of the drill. To stop drilling, clutch 18 disengages shaft 77 and, moving it to the left (Fig. 1), locks nut 20 at its end. Rod 22, rotating with its threaded part having a left-hand thread, moves gear 20 in the already fixed nut. reverse drilling

The subject matter of the invention.

Modification of the device for determining the strength of rocks or coal in the face according to the ed. swith No. 8484, characterized by using instead of a kelenchaty lever 24 (ed. No. 8484) a differential screw coupling, the nut 24 of which is connected by a gear drive 23 to the drive shaft 3 of the device, and the worm to 26 is rigidly connected to the counters 30 k with the possibility of axial displacement on the shaped part of the transmission shaft 25 to the drill rod 22.