The invention discloses a variable-frequency electrically-driven
top drive type
core drill used for geological
coring exploration. The
drill comprises a platform and a vertical derrick arranged on the platform, wherein an electrically-driven
winch and a salvage
winch are arranged on the platform and are used for reeling and unreeling a
rope, an electrically-driven turn plate is further arranged on the platform and located at the lower end of the derrick, a guide rail parallel to the derrick is arranged on the derrick and is connected with a top driver through a bracket
pulley, the top driver is directly connected with a
drill rod through a connecting shaft by means of a variable-frequency motor, a motor of the top driver, a motor of the electrically-driven
winch, a motor of the salvage winch and a motor of the electrically-driven turn plate are driven by a frequency converter in an
electric control room, the frequency converter controls the motors to work in the
electric control room, the
drill is further provided with an engineer room used for monitoring the work of the drill, and a
rope tension and
rope speed detection device is further arranged at the top end of the derrick. According to the variable-frequency electrically-driven
top drive type
core drill used for geological
coring exploration, the drill is driven by an alternating-current variable-frequency motor to achieve rotating, rising, feeding, salvaging and the like, the long-
stroke guide rail is provided, the rope speed and tension detection function is achieved, and high efficiency and low
energy consumption drilling operation is achieved under the control of the frequency converter.