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Elevator wire rope scrap standard is what
Release time:
2022-11-01
The above is the relevant content compiled by Luoyang Baikte Technology Development Co., Ltd. The company's main products are: wire rope nondestructive testing, wire rope nondestructive testing, wire rope nondestructive testing, wire rope nondestructive testing, wire rope nondestructive testing and other products and services. Our company is a high-quality development group with strong technical force, providing high quality products, complete solutions and excellent technical service companies for the majority of users.
Elevator wire rope scrap standard is what
What is the scrap standard of elevator wire rope? Below, Luoyang Baikte Technology Development Co., Ltd. small series from the nature and quantity of broken wire, rope end broken wire, broken wire local aggregation, broken wire increase rate, rope strand fracture and other aspects of the elevator wire rope scrap standard.
Broken wire at rope end
When there is a broken wire at or near the rope end, even if the number is small, it indicates that the stress at the part is very high, which may be caused by incorrect installation of the rope end, and the cause of the damage should be found out. If the length of the rope allows, the broken wire should be cut off and re-installed reasonably.
Local aggregation of broken wires
If the broken wires are close together to form a local aggregation, the wire rope should be scrapped. If this kind of broken wire is gathered in the rope length range of less than 6d, or concentrated in any rope strand, then, even if the number of broken wires is less than the value listed in the table, the wire rope should be scrapped.
Increase rate of broken wire
In some occasions, fatigue is the main cause of wire rope damage, broken wire is in use after a period of time began to appear, but the number of broken wire gradually increased, the time interval is getting shorter and shorter. In this case, in order to determine the increase rate of broken wire, the increase of broken wire should be carefully checked and recorded. This "law" can be used to determine the future date of wire rope scrap.
strand break
If the entire strand breaks, the wire rope shall be scrapped.
Reduction of rope diameter due to core damage
When the fiber core of the steel wire rope is damaged or the steel core (or the internal strands in the multi-layer structure) is broken and the rope diameter is significantly reduced, the steel wire rope shall be scrapped.
Minor damage, especially when the stresses in all strands are well balanced, may not be apparent with the usual methods of inspection. However, this situation will cause the strength of the wire rope to be greatly reduced. Therefore, when there are any signs of minor internal damage, the internal inspection of the wire rope shall be carried out to find out. Once the damage is confirmed, the wire rope shall be scrapped.
elastic reduction
In some cases (usually related to the working environment), the elasticity of the wire rope will be significantly reduced, and it is not safe to continue to use.
The decrease in the elasticity of the wire rope is difficult to detect. If the inspector has any doubts, the opinion of the wire rope expert should be consulted. However, the decrease in elasticity is usually accompanied by the following phenomena: the decrease in rope diameter; the elongation of the lay length of the wire rope; the lack of gaps between the wires and between the strands due to the mutual compression of the parts; the slight brown powder appears in the recesses of the strands; although no broken wires are found, the obvious unbending and diameter reduction of the wire rope are much faster than those caused by wire wear alone. This situation will lead to sudden fracture under dynamic load, so it should be scrapped immediately.
The above is the relevant content of Luoyang Baikte Technology Development Co., Ltd. The company's main business: wire rope nondestructive testing, wire rope nondestructive testing, wire rope nondestructive testing, wire rope nondestructive testing instrument,Wire rope nondestructive flaw detectorProducts and services, our company is a strong technical force of high-quality development groups, for the majority of users to provide high quality products, complete solutions and excellent technical service company.
The content of the article comes from the wire rope nondestructive flaw detector:http://www.lybkt.com/
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