A lifting system for a metallurgical plant including an object with one or more trunnions and a lifting device with one or more lifting hooks for receiving the trunnions, wherein the lifting system further includes a detection system, the detection system includes a receiver, a sensor, a magnet and a transmitter, and wherein the magnet and the sensor are aligned upon correct alignment of at least one lifting hook and one trunnion such that a signal is submitted to the receiver.

An acoustic-electric remote control release hook used on water and underwater includes a first shell and a cylindrical framework. The cylindrical framework is fixedly connected with the first shell in a detachable mode; the first underwater transducer is remotely matched with a second water transducer which extends to the underwater through a cable, and the second water transducer is connected with a control switch through a cable. An acoustic command receiving module is arranged inside the first shell, and a power supply end of the acoustic command receiving module is connected with the power supply. A signal input end of the acoustic command receiving module is connected with the first underwater transducer through a cable and a watertight connector assembly, and a signal output end of the acoustic command receiving module is connected with the driver of the direct-current motor.

An acoustic-electric remote control release hook used on water and underwater includes a first shell and a cylindrical framework. The cylindrical framework is fixedly connected with the first shell in a detachable mode; the first underwater transducer is remotely matched with a second water transducer which extends to the underwater through a cable, and the second water transducer is connected with a control switch through a cable. An acoustic command receiving module is arranged inside the first shell, and a power supply end of the acoustic command receiving module is connected with the power supply. A signal input end of the acoustic command receiving module is connected with the first underwater transducer through a cable and a watertight connector assembly, and a signal output end of the acoustic command receiving module is connected with the driver of the direct-current motor.

A lifting hook including a fixed portion and a moving portion coupled to the fixed portion, the moving portion being pivotable between a locking position in which the moving portion retains a profile of a formwork panel housed in a housing of the fixed portion, and a release position in which the profile of the formwork panel can be introduced into or extracted from the housing. The lifting hook also includes a pushing part coupled to the fixed portion which pushes the moving portion when the pushing part is pulled.

A tool lifting device has: arms connected to pivot relative to one another; and a load bearing pin secured to a first arm of the arms, the arms having a closed position where the load bearing pin is supported by, and spans a tool receiving gap defined between, the arms. A tool lifting device has: arms connected to pivot relative to one another; a load bearing pin supported by one or more of the arms, the arms having a closed position where the load bearing pin extends across a tool receiving gap defined between the arms; and a pivot lock for restricting the arms from pivoting relative to one another in the closed position.

A tool lifting device has: arms connected to pivot relative to one another; and a load bearing pin secured to a first arm of the arms, the arms having a closed position where the load bearing pin is supported by, and spans a tool receiving gap defined between, the arms. A tool lifting device has: arms connected to pivot relative to one another; a load bearing pin supported by one or more of the arms, the arms having a closed position where the load bearing pin extends across a tool receiving gap defined between the arms; and a pivot lock for restricting the arms from pivoting relative to one another in the closed position.

An apparatus for lifting a buried explosive device includes a T-shaped base including a flange member and a web member. The web member has one end fixed at a right angle to the midpoint of the flange member. A vertical upright member is fixed at one end to the midpoint of the flange member. A diagonal member is fixed at one end to the other end of the vertical upright member and fixed at another end to a second end of the web member that is distal the flange member. The vertical upright member is at least twice a length of the web member. The flange member, the web member, the vertical upright member and the diagonal member are L-channel members made of carbon fiber.

A method of automatically conveying an object, using a suspending moving device and a robot having an arm configured to hold the object, the suspending moving device including a suspender and a moving mechanism configured to move the suspender, and the suspender including a coupler configured to be coupled to the object and a suspending member configured to suspend the coupler, is provided. The method includes a step for locating the coupler of the suspender at a given first position, a step for locating the object at a given second position, a step for causing the robot to hold the coupler located at the first position and coupling the held coupler to the object located at the second position, and a step for causing the suspending moving device to move, by the moving mechanism, the object coupled to the coupler together with the suspender.

A swivel device with rotation damping, adapted to rotationally couple a hoist cable to a hoist hook, the device including: a first disc fixedly mounted on a central axle and adapted to be operationally coupled to a distal end of the cable by a non-rotating coupling; a second disc rotationally mounted on the central axle and spaced apart from the first disc, the second disc adapted to be operationally coupled to the hoist hook by a non-rotating coupling; a first set of magnets mounted on the first disc; and a second set of magnets mounted on the second disc, magnetic fields of the first set of magnets interacting with magnetic fields of the second set of magnets to damp rotation of the second disc about the central axle.

A swivel device with rotation damping, adapted to rotationally couple a hoist cable to a hoist hook, the device including: a first disc fixedly mounted on a central axle and adapted to be operationally coupled to a distal end of the cable by a non-rotating coupling; a second disc rotationally mounted on the central axle and spaced apart from the first disc, the second disc adapted to be operationally coupled to the hoist hook by a non-rotating coupling; a first set of magnets mounted on the first disc; and a second set of magnets mounted on the second disc, magnetic fields of the first set of magnets interacting with magnetic fields of the second set of magnets to damp rotation of the second disc about the central axle.