ROLLER CRUSHER AND METHOD OF ROLLER CRUSHER PROTECTING AGAINST NON-SHATTERABLE OBJECTS Russian patent published in 2017 - IPC B02C4/32 B02C25/00 

FIELD: machine building.

SUBSTANCE: group of inventions relates to roller crusher and method of its protection against non-shatterable objects. Roller crusher with two substantially parallel rollers arranged with possibility to rotate in opposite directions and separated by gap, contains feeder, adjustment gate, first detector located with possibility to detect non-shatterable objects. At that, feeding device is made with possibility to feed material into roller crusher, adjustment gate – with possibility of controlling of material feed rate into said gap, device to adjust gap – with possibility to adjust said gap width, and control unit – to receive at least one input signal from first detector and to transmit at least one output signal to adjusting gate and to gap adjusting device. Method consists in fact that in material flow, which is fed into roller crusher, non-shatterable object is detected, gap between rollers is opened on bypass width considerably exceeding working width, and enable possibility of non-shatterable object passage through gap, wherein limiting flow fed into gap, enabling material feed into gap with limited speed, then determining whether said non-shatterable object has passed through gap, and then gap is reduced to working width and opening said flow supplied into gap, wherein enabling material feed into gap with working feed rate.

EFFECT: roller crusher and method of its protection prevent crusher destruction in case of non-shatterable objects falling into gap between rollers.

15 cl, 3 dwg