What is the rope standards?Release:admin | Published: 2010年6月25日
What is the rope standards?
The overall design of hoisting machinery are not allowed to have long life infinite rope.
For six and eight strands of broken wire rope, mainly happened in appearance. For multi-layered rope strands of wire rope (typically more shares structure) is different, the broken wire rope occurred within the most, is "invisible" fracture.
Consider these factors listed below, therefore, when the 2.5.2 and 2.5.11 ~ combination of factors, it is suitable for various structural steel wire.
2.5.2 wire-breaking secure
When the secure or near wire-breaking appear even also shows that the few in number, high stress is likely due to secure not installed correctly, should ascertain the cause. If the string length, should be allowed to cut part of the broken wire to reasonable installation.
2.5.3 wire-breaking local together
If broken wire abuts local gathered together, wire should be scrapped. If the broken wire rope gathered in less than 6d long range, or in a rope on the stock, then, even if broken wires in less than the list of values, steel wire shall also be scrapped.
The rate of increase 2.5.4 broken wires
In some cases, the fatigue damage caused by wire rope is the main reason, is in the use of wire-breaking after a period, but the wire increases, the shorter and shorter. In this case, in order to determine the increasing rate of broken wire should be careful examination, and increased. Wire-breaking Determine the "law" can be used to determine the future of wire rope.
2.5.5 rope strands of fracture
If the rope strands of fracture, wire should be scrapped.
2.5.6 due to the damage caused by wire core diameter decreases the rope
When the steel fiber core damage or core (or multi-layer structure of internal rope) caused by fracture significantly reduced hours, rope size should be scrapped rope.
Slight damage, especially when all the rope in shares in good balance, stress with the inspection methods usually may not be obvious. However this will cause the wire rope strength greatly reduced. So, any signs of damage to the internal subtle, with rope inspection shall be found inside. Once confirmed, the rope damages should be scrapped.