Ropes and cables are mainly used in ship configuration, fishing, port loading and unloading, electric power construction, oil exploration, national defense and military industry, sporting goods and other fields. Its structure is divided into three-strand, eight-strand and twelve-strand ropes. The product is widely used and has the characteristics of high strength, low extensibility, wear resistance, softness and smoothness, and easy operation.
Precautions for the use of the rope: Before each use, carefully check the markings, labels, insertion eyelets, and the rope body for incisions, broken strands, broken wires, knots and other damaged parts. If there are no abnormalities and defects, it can be used normally; when unwinding the rope, release the rope from the end of the rope in the circle, the rope should be released counterclockwise.
A rope buttoning occurs if the rope is unwound counterclockwise. If a button knot is created, put the rope back into the loop, spin the loop, and pull the rope out of the center. A better way is to unwind the rope on the turntable. At this point, the rope can be pulled out from the end of the outer rope. If people stand too tight under the rope, there is a danger. Once the rope is out of control, it will produce a huge rebound of tension, which is likely to cause casualties.
If the rope is unwound from the spool, the spool itself should rotate freely. This is easy to do with a pipe through the center of the spool, but it is strictly forbidden to place the spool vertically to unwind the rope; if the rope is unwound from a pulley device, the ratio of the diameter D of the pulley to the diameter D of the rope should exceed 5, but some high performance fibers Rope ratios up to 20.
For ropes, it is recommended that the diameter of the pulley groove be 10%-15% larger than the diameter of the rope. If the arc of the rope contacting the pulley groove is 150 degrees, the rope can reach a good state of stress, and the height of the pulley boss should be at least 1. To prevent the rope from running out of 5 times the diameter of the pulley. In addition, check the pulley frequently and maintain the bearings regularly to ensure that the pulley rotates smoothly.
The rope should be scrapped or taken out of service in the following cases: the rope is visibly charred or melted; the linear distance is equal to the length of the rope, the surface rope yarn or the volume of the rope is reduced by 10%; the rope is exposed to extreme temperature environments beyond the range; UV exposure Decreased, debris formed on the rope surface; rope appeared in severely damaged hot melt, hardened and crushed areas; melting or bonding affected more than 20% of the rope.
Post time: Aug-03-2022