What safety device should be installed on the hoisting hook of crane
The safety device of the hook is mainly reflected in the anti falling off:First, to prevent the sling on the hook, the hook automatically from the insurance device. The utility model is characterized in that a clamping spring piece is arranged at the opening of the hook head, and the opening is closed, and the spring sheet can only be pressed downwards, and can not be turned upwards when the sling is released, which can prevent the sling from falling off automatically.Two, tower crane hook anti off safety device, which is composed of a nut, rope, wire rope, pulley, ring, hook, chain box sling, material box, hook, hook, the first locking type lock opening, elastic lock opening and the movable locking strip integral. Which is an annular chain or circular chain, namely the chain chain type, its end and the first connecting hook, other end connected with the pulley rope, which is between the traditional hook and rope pulley is connected with the chain chain, increase the class, especially the ring chain.Three, then the tower crane lifted the circular chain safety device, which is characterized in that the lock closed hook, the movable locking strip, hanging hook, unloading, only the elastic movable locking strip with hands pressed down, can be put into the ring chain, loose, locking bar under the action of the spring force, automatically closed lock you can.Four, precautions and assembly measures are shown below:
1. hook safety device. Mainly to prevent the crane when the work, the weight drop is hampered by the hook continued to decline caused by the rigging off hook accident. The utility model is characterized in that a spring cover is arranged at the opening of the hook, and the cover can not be opened upwards and can only be pressed downwards to prevent the sling from being discharged from the opening.2. reel safety device. The main reason is that when the transmission mechanism fails, the wire rope can not be arranged on the spool so that it can cross the end flange of the reel and cause the rope to bite.3 ladder retainer(1) when the ladder of the channel height is greater than 5m, set up from the platform above 2m retainer. Retainer should remain intact, does not appear too large deformation and small circle, open welding phenomenon.(2) when climbing the ladder is arranged on the internal structure, such as climbing the ladder and the spacing structure is less than 1.2m, can not be provided with a retainer.
Safety device of crane hook:1, to prevent the safety of the safety device: to prevent hanging off the hook, the hook opening to increase the spring baffle2. Wire rope reel device: to prevent the rope from jumping out of the pulley device, increase the flank on both sides of the wire rope to prevent the rope from jumping out.
