Dust-laying system of nozzles for coal mining cutter - adjusts number of nozzles opened by electrically controlled valve in accordance with direction of cutter movement

摘要

The nozzles (3) are connected to a central water supply line (2) and fed by valves (4) under electric control (7) in response to signals from a displacement measurement system (6) on a cutter (5). Each nozzle (3) serving a specific position (1) has its own control valve (4) and several adjacent nozzles are supplied at the same time in accordance with the direction (X) of cutting, so that the regions sprayed are variable in size. The valves (4) may be two-position two-port electropneumatic valves. ADVANTAGE - Optimal control of dust is guaranteed with low consumption of water in variable regions.