The site of the daily inspection of the bridge crane has those
The brake piece, the motor's slide ring, the speed reducer gear oil, the wheel lube oil, the electric contactor, the line, etc., can look at the instruction.
?crane hook (1) remove maintenance check hook, beams, pulley, shaft, bearing, and clean and smooth, hook, beams and slide shaft, no crack, threaded portion should not be loose, bearing in good condition, turn the pulley, thread tool marks or cracks relief groove should be replaced; (2) to inspect the wear and tear of the dangerous section, and the risk section shall wear more than 10% of the original height; (3) the hook test, after overhaul, hook test should be done, to 1.25 times the rated load of suspended for 10 minutes, hook mouth is elastic volume should not exceed 0.25% of the hook dimensions, should not have permanent deformation after unloading and crack; (4) the gap between plate and plate should not be greater than 0.3 mm after the plate hook is riveted and the plate is riveted. (1) inspection of wire rope maintenance (1) of crane wire rope. (2) radial wear and tear: the radial wear of a wire shall be more than 40% of the diameter of the original diameter, and the whole wire rope shall be scrapped; (3) distortion inspection: the diameter of the wire rope is reduced to 70% of the diameter of the rope, the core of the rope is exposed, and the broken stock should be scrapped and replaced with a new wire rope. (4) wire lubrication, lubrication before use steel wire brush, such as kerosene cleaning, with hemp rope grease (Q/SY1152-65) or synthetic graphite calcium base lubricating means (SYA1405-65) dip-coating saturation is advisable. 3, crane pulley block (1) maintenance overhaul block and tackle unpick and wash, check the crack, sliding shaft can not have crack, may not wear the shaft neck diameter 30%, conicity is not more than 5%, more than the value that should be replaced;
?check on the nut, split pin, positioning plate brake whether complete, loose, lever and spring no crack, the pin on the brake wheel bolt and buffer gasket is loose, and complete; The brake is reliable. The brake block should be less than 1.0 mm when the brake is opened and should be equal to the distance between the two sides of the brake wheel. 2) check the safety protection switches and limit switches to be accurate, flexible and reliable, especially if the rising limit is reliable. 3) check the drum and wire rope winding on the pulley is normal, the presence of groove, channeling, knot, the phenomenon such as distortion, wire rope clamp bolt fastening, whether is there a double nut locking device. 4) check that the fastening screws on the shaft of the lifting mechanism are loose and short. 5) check whether the transmission is normal or not. 6) check for good lubrication of all lubricants. 7) check if there are foreign objects in orbit that block the bridge.
