bridge crane metal structure safety precautions

In the process of using the  overhead bridge crane ,  bridge girder must ensure that does not produce too much under the scratch and scratch under permanent deformation. Otherwise, there will be the following hazards:
(A) on their own after the car brakes "slip on" is not an accurate stop when climbing in the car would cause motor overload and burn out the motor.
(2) the running gear shaft distortion of excessive force too. Cause coupling bolts broken, or even broken shaft.
(3) the deformation caused by the wheel-rail trolley car rails, and even car derailment; under the cover of the main beam and the web of cracks, seriously threaten the safe operation of Wo.
4  bridge crane  safety precautions mechanical parts
Bridge crane hook must be regularly checked parts, to avoid accidents
(A pulley groove wear uniform, uniform contact with lead wire rope pulley, serious accident occurs operation; pulley shaft pulley shaft can lead to excessive wear of the broken, the relevant provisions of wear more than once. Must be replaced.
(2) If the roll or excessive wear fatigue cracks, could easily lead to damage rolls; Jane key if the volume badly worn, could easily lead to key off, cut, could easily lead to serious heavy fall. In this case
Case should be replaced
(3) small shaft brakes, spindles, brake wheel, excessive wear pad and brake shoe material rod, spring has fatigue cracks can lead to brake failure and should be replaced.
(4) If the dangerous section hook openings or excessive wear of the tail, the tail thread undercuts, hook surface fatigue cracks can lead to hook fracture. Therefore, the response to hook garbage annually check l ~ 3 times and found the timely replacement of smell title
(5) If the crane wheel spokes, tread a fatigue crack, or wheel rim, excessive tread wear, are likely to cause wheel damage, causing severe crane derailed.
(6) If the orbit of the oil, the motor starts too fast, uneven tire pressure, likely to cause the car to run institutions skid; trolley deviate wheel diameter are not equal, the wheel mounting error is too large, the production process of the deformed body, round uneven pressure from the small wheels are easy to l even by force, it must be adjusted.
(7) cricket crane ministries regularly check the bearing temperature, noise and lubrication; if abnormal sound gear, to timely repair or replacement
(8) If the deviation is too drive too, frame deflection distortion, rail and wheel installation error is too large, the track of the oil, are prone to eating dog car was running, it must be timely adjustments, cleaning, corrected.

5 bridge crane electrical equipment safety precautions
overhead bridge crane drive motor through reducer and drive mechanism to achieve hook front, left, up and down, in order to ensure safety at work, you should set the necessary electrical protection systems, such as the main disconnect switch, emergency power off switch, short circuit protection, overload protection, limit protection. To the sound of the motor regularly shuttle Sik and fever case, the solenoid is working properly. Controllers and contactors are flexible to use. Must do: First, prevent operating errors or controller, protection plate and other electrical failure caused by loss of control, the occurrence of heavy objects fall or collision accident; second is to prevent sliding touch bare wires or insulation damage power, poor grounding an electric shock; three is flammable and explosive places, must be explosion-proof  hoist crane es.