Attention to the use of steel wire rope for tower crane lifting and scrap standards

01-08-2019

Tower lifting wire rope is an important part of Tower lifting, which is responsible for lifting heavy objects. Therefore, the inspection and maintenance of the steel wire rope of the tower should be strictly and promptly implemented.

The following introduction, the use of steel wire rope tower and scrap standards.
Attention to the use of steel wire rope for tower lifting
1. During the use of the steel wire rope of the tower crane, the wire rope should be prevented from ringing, twisting, bending or sticking to debris to prevent friction with mechanical or other debris.

L69 Mast Section

2. After the tower crane is installed, the steel wire rope of the tower crane shall be lubricated before use, and the graphite grease shall be applied again. Afterwards, the lubrication of the steel wire rope of the tower crane shall be carried out according to the "crane lubrication meter".
3. When lifting molten or hot metal, acid solution, explosives, inflammable materials, the number of broken wire of Tower hanging wire rope is halved.
Standard for scrap of steel wire rope hanging from towers
Tower wire rope is not allowed to have an indefinite life. It should be scrapped in one of the following cases. Tower wire rope scrap standard:
A. Tower rope 6 × 19-d(D wire rope diameter) The number of broken wires in 6D length exceeds 5, and the number of broken wires in 30D length exceeds 10.
B. Tower rope 6 × 37-d(D wire rope diameter) The number of broken wires in 6D length exceeds 10, and the number of broken wires in 30D length exceeds 19.
C. The steel rope of the tower hanging is close together and should be scrapped even if the number of broken wires in the 6D length does not exceed 5.

L69 Mast Section

D. Although there is no broken wire, the steel wire rope of the tower hanging is worn up to 40 % of its diameter, or when the steel wire rope of the tower hanging is reduced by 7 % or more relative to the nominal diameter, or the steel wire rope of the tower hanging is obviously bent. Wait.
E. The steel rope of the tower suspension loses its normal shape and produces deformities, such as waves, cage-like distortions, rope extrusion, wire extrusion, local enlargement of the rope diameter, twisting, local reduction of the rope diameter, partial crushing, and bending.
F. When the steel rope diameter of the tower is subjected to special heat, an identifiable color appears on the outside.

L69 Mast Section

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