RU1776307C - Rock-breaking mechanism - Google Patents

Abstract

The invention may used in the mining industry and is intended for the selective extraction of vein deposits. The purpose of the invention is to increase the destruction efficiency by providing a preliminary static expansion of the collet petals. In the guide barrel 1, with the possibility of longitudinal movement, a rod (Ш) 3 with an end wedge-shaped sharpening and an annular transverse shoulder, a drummer 4, a compression spring 5 and a piston (П) 6 are sequentially placed. With the bottom resting on the shoulder Ш 3 in the barrel 1 is a glass 2 in which at its open end there is a hammer 4, held in its original position by the trigger lock 8. At the end of the barrel 1, a collet with a transverse pinning element is installed on the outer surfaces of the petals 9. Collet 9 in the hole. When fluid is supplied through the nozzle 10 under pressure into the cavity 7 of the barrel, P 6 compresses the spring 5. which presses on the cup 2 and through it on Ш 3. The latter pushes the petals 9 of the collet, introducing the pinning elements into the borehole walls. Compression of the spring 5 continues with pressure P 6. When the trigger latch 8 is activated, the hammer 4 is released and strikes at W 3. The rock is destroyed. 1 ill. o yo