L68A1 Mast Section Self-examination of steel wire rope for tower crane
1. There is no damage to the reel. The height of the flange on both sides of the reel exceeds the two diameters of the outer wire rope. The minimum number of remaining rings on the reel is not less than 3 laps. The wire rope is arranged neatly.
2. No damage to pulley, crack
3. The end of the wire rope is fixed in accordance with the specifications.
4. When the measured diameter of the wire rope is reduced by 7 % or more relative to the nominal diameter, the wire rope should be scrapped even if no broken wire is found.
5. Steel wire rope should be scrapped if the number of broken wires in the specified length reaches the scrap standard.
6. In the case of wave shape, the wire rope should be scrapped if the waveform amplitude value reaches 4d/3 or above within the length of 25d.
7. Serious twisting, crushing and bending of wire ropes should be scrapped.
8. Local increase of rope diameter is usually related to core distortion, and local increase of rope diameter should be scrapped; The local reduction of rope diameter is often related to the breaking of the rope core, and the serious reduction of rope diameter should also be scrapped.
9. Both the pulley and the reel shall be fitted with a wire rope detaching device, which is complete and reliable, and the gap between the pulley or the outermost edge of the reel is not greater than 20 % of the wire rope diameter.
10. The wire rope is correctly wound, well lubricated, and has no interference.
L68A1 Mast Section L68A1 mast section good at in this field
