Gyrator motor variable speed device for underwater down-the-hole drill

The invention relates to the technical field of down-the-hole drill equipment of reef boats, and particularly discloses a gyrator motor variable speed device for an underwater down-the-hole drill, which comprises a main power distribution cabinet, a drill power distribution cabinet, a frequency converter cabinet, a gyrator motor, a speed regulator and a cable, a power supply of the speed regulator is connected into a leakage protection switch of the drilling machine power distribution cabinet and a frequency converter input end of the frequency converter cabinet in sequence, then is led out from an output end of the frequency converter, is connected into a contactor input end of the drilling machine power distribution cabinet, is led out from an output end of the contactor and is finally connected into an input end of the gyrator motor; according to the gyrator motor variable speed device for the underwater down-the-hole drill, suitable variable speed gears can be selected according to different geological co