最新国产一级二级三级视频视频_久久9999无码精品亚洲日韩_精品视频在线99_日韩 偷拍 麻豆_宅男的天堂榴莲app官网_亚洲精品美女国产极品在线_亚洲日产中文字幕_?V无码黄色毛骗_av午夜免费观看_成人自拍视频在线观看_中文国产成人精品久久`_亚洲精品文字幕第二区

1 Nature and number of broken wires

The overall design of the lifting machinery does not allow the wire rope to have an infinite long life.

For 6 - and 8-strand wire ropes, breaking occurs mainly on the outside. For the multi-strand wire rope (typical multi-strand structure) is different, most of this wire rope break occurs in the interior, so it is an "invisible" break.

2 The end of the rope is broken

When there is a broken wire at or near the end of the rope, even if the number is small, it indicates that the stress in the part is high, which may be caused by the incorrect installation of the rope end, and the cause of the damage should be identified. If the length of the rope allows, the broken wire should be cut and re-installed reasonably.

3 Local aggregation of broken wires

If the broken wires are close together to form a local aggregation, the wire rope should be scrapped. If such broken wires are concentrated in a rope length range of less than 6d, or 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.