FIELD: process engineering.
SUBSTANCE: invention relates to coke grinders. Coke grinder is secured at drill bar end to be spun. Water is forced via drill bar into tool intake channel and, therefrom, to valve. Thereafter, via flow channels and cutting and drilling nozzles, it is released for cutting of drilling of coke. Water selector allows changing from drilling mode to cutting mode and vice versa. For this, selector switch linear displacement is converted into control device rotation so that linearly displacing switch displaces concentric control elements shifted through 90 degrees. This allows 90 degrees turn of rotary holder connected with said valve for tool selection.
EFFECT: safe and reliable selector and control device.
14 cl, 7 dwg
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