General operating conditions crane accident prevention

We must first adjust the brake to maintain proper tightness, otherwise the brake is too loose can cause due to inertia caused by running "over volume" accident. Always test the limit switch is sensitive and reliable,Steel crane to prevent contact adhesion, disorders and other causes of action axis limits control failure. For L × 10-31 type of ruler-type limit switch limit device, to switch the bottom end of the swing arm welded non-weight top column, preventing the use of overwinding long, because the positioning angle plate to the top of the bottom of the pit and switch causes the switch lapse. Prohibited when the protection contactor armature plate against excessive noise pull large or total contactor coil circuit failure can not be due to suction timely, on top of the contactor armature forced to continue working because forced top deputy limit control can cause failure. Double limit a worm type,hoist crane foot type configuration, the positioning of the worm or extreme foot-in limit position is lower than about 20cm, so that can achieve sub-control, but also on foot-in limit play a protective role in making overwinding more complete protection.
     Regularly monitored by the limit operation circuit is normal, to prevent short-circuit, resulting in ultimate failure of the ground, to prevent incorrect wiring caused by "over volume."bridge crane Do a good job of maintaining the main circuit, the main contact to prevent adhesions, catching armature contactor failure resulting limits.