| 摘要 |
A dust collecting device, intended for use at air-flushed rock drilling, is cleaned and discharged in that its air-flow-establishing air ejector is shut off and in that its fabric filter unit is vibrated, whereafter the device is opened and collected dust is removed. A control system for remote control prevents automatically the filter unit from being vibrated during suction of dust, said control system being connected to the flush air conduit of the rock drill for making the operation of the dust collecting device responsive to the position of the flush air throttle valve. The control system also comprises a timing unit for determining of the time interval during which the filter unit is exposed to vibrations. |
