Dragging type self-balancing circular hole expanding and perforating device

The utility model discloses a dragging type self-balancing circular hole expanding and perforating device. The utility model discloses a non-excavation crossing construction device, which belongs to the field of non-excavation crossing construction, and comprises a steel wire rope, a steel wire rope bayonet, a steel wire rope interface, a drill bit, a torque motor, a pressure buffer mechanism, a universal joint, a reverse twisting mechanism and an armored cable, the upper part of the pressure buffer mechanism is connected with the torque motor; the upper part of the torque motor is connected with the drill; the lower part of the reverse twisting mechanism is connected with the armored cable; according to the utility model, the reaction torque generated during the drilling of the drill bitis balanced by utilizing the friction force generated by the contact of the reverse twisting knife in the reverse twisting mechanism and the hole wall, and the torque self-balance of the hole puncheris realized, so that the t