Crane Rail Safety Inspection

Crane rails are fundamental components for crane operations. They provide a stable running path for cranes, ensuring that lifting and transportation tasks can be completed safely and efficiently.

1. Safety Inspection of Rails: Inspect the rails, bolts, and splice plates for cracks, loosening, or corrosion. If any cracks are found, they should be replaced promptly. Other defects should be repaired without delay. The main inspection tool is a rail flaw detector.

2. Measurement and Adjustment of Rails:

(1) Rail straightness can be checked using a stretched steel wire. Stretch a 0.5mm steel wire between stops at both ends of the rail, then measure each point using a plumb bob. Measurement points should be spaced approximately 2 meters apart.

(2) Rail elevation can be measured using a leveling instrument.

(3) Rail span can be checked using a steel tape measure or an infrared measuring device. For bridge cranes, the permissible deviation in span is ±5mm. The longitudinal slope of the rail should be 1/1500, and the permissible elevation difference between the two rails is 10mm.

(4) Rail joints can be made as straight joints or beveled joints at a 45° angle. Beveled joints allow wheels to transition smoothly at the joint. Typically, the joint gap is 1~2mm. In cold regions, temperature effects should be considered, generally requiring a gap of 4~6mm. The height difference between the two rails at the joint should not exceed 1mm.

Source: Internet