The application belongs to the field of
building construction equipment and discloses a safe lifting device for
civil engineering, which comprises a derrick, a lifting cage, a controller, a fall protector, a
pulley mechanism, a power mechanism and a counterweight mechanism, the top plate is of a groove type structure and is provided with a plurality of U-shaped rods on four sides, rollers that roll with the derrick are arranged on the U-shaped rods, a secondary braking mechanism is arranged on the lifting cage, the secondary braking mechanism comprises four sliding grooves, the openings of the sliding grooves face the inner side surface of the derrick, a sliding
brake plate is arranged in the sliding grooves, a
brake rope is arranged at the bottom of the sliding
brake plate, a self-locking
assembly that cooperates with the brake
rope is arranged in the inside of the cage body, the bottom end of the brake
rope extends to a storage box at the center of the bottom of the cage body in a
diagonal direction, a brake starting
assembly that is connected with the brake rope is arranged in the storage box, and a guardrail mechanism that is used to be connected with a stopping layer platform is arranged on the outside of the derrick. The device is reasonable in design, high in braking safety, high in stopping layer safety and high in grounding safety, and is suitable for large-scale promotion.