Surface dust removal device for detector of coal gangue sorting machine

The utility model discloses a surface dust removal device for a detector of a coal gangue sorting machine. The surface dust removal device comprises a rodless air cylinder, a curved pipeline, a flat nozzle, a fixed base, a stop block, a driving rod, a reset base, a sliding groove connecting rod, a reset spring, a connecting pin, a threaded hole, a fixed base, a bearing end cover and a fixed bearing. The dust removal device is reasonable in design, the function of removing dust without dead corners in a moving mode is achieved, the thoroughness of cleaning is improved, the working mode of traditional dust removal is changed, the nozzle is driven by the sliding mechanism of the rodless air cylinder to move back and forth, and therefore the function of removing dust without dead corners in the moving process is achieved. The flat nozzle and the rodless air cylinder are installed at a certain angle, light signals are prevented from being blocked, when the flat nozzle moves to the other end, the flat nozzle is pus