Compound rope use of attention

Compound rope by steel wire, rope core, and grease composition, in the material handling machinery work, for lifting, traction, tension, and bearing. As an essential rope, is widely used in many fields related to the national economy. So, what are the points to note when using the compound rope?

Here is the content list:

• The compound rope connection

• The maintenance of steel wire rope

• The choice of compound rope should meet the requirements

The compound rope connection

1. Rolling head method: the general number of the rolling head shall not be less than 3, rolling head spacing shall not be less than compound rope diameter 5~6 times, the last rolling head shall keep 140~150mm, rolling head tightening to the compound rope flattened 2/3 or so.

2. Sleeve method: the Compound rope headset in a certain thickness and length of the steel pipe, in the press, will be flattened that is. 3.

3. Molten lead method: the wire rope wire disassembled and washed, worn in the conical sleeve, the end of the wire bent into a hook and then filled with lead alloy after cooling can be.

4. Braiding method: the Compound rope sleeve into the heart-shaped mat ring, the use of wire rope braided together, and then the end of the wire tie, the braided length of 20 ~ 25d, generally not less than 300mm.

The maintenance of steel wire rope

1. Stock and transit Compound rope should be arranged in volumes, not overlapping piles, and to separate with corrosive goods, pay attention to moisture, prevent extrusion;

2. The compound rope in use should be suspended in the rope frame, the best according to the specifications, make an obvious mark, to prevent mistakes;

3. Compound rope after use, should be dried, brush to ash and mud, and on the surface coated with anti-rust oil.

The choice of compound rope should meet the requirements

1. Compound rope end fixed pressure plate should be ≥ 2 or with wedge block fixed in the reel and other components.

2. When the hook and other fetching device is in the lowest position (including the pit), the compound rope winding circle on the reel, in addition to the fixed rope tail circle, must be left ≥ 2 circles.

The compound rope scrap standard

The Compound rope should be scrapped in one of the following cases:

1. For cross-winding wire rope in a twist distance (refers to anyone Compound rope stock around a week of axial distance) within the number of broken wires up to 10% of the total number of wires;

2. Lifting hot metal or dangerous goods wire rope, its scrap broken wire number is half of the general crane, such as broken wire phenomenon concentrated in the local, or in six times the length of Compound rope diameter broken wire concentrated in a, should be following half of the provisions of the scrap;

3. Compound rope surface layer wire corrosion or wear up to the surface of the original wire diameter of 40%;

4. The rope diameter reduction amount reaches 7%;

5. Compound rope has obvious internal corrosion;

6. The rope surface wear or corrosion, and a certain number of broken wires, the number of broken wires should be in a and b of the provisions multiplied by the discount factor to determine: when the wear or corrosion rate of 10%, 15%, 20%, 25%, 30% ~ 40%, the discount factor corresponds to 85%, 75%, 70%, 60%, 50%;

7. The whole strand is broken or burned;

8. Local outer wire rope elongation is "cage" shape or Compound rope fiber core diameter increase more serious;

9. The Compound rope occurs twist, dead-end, hard bend, plastic deformation, hemp core off, and other serious deformation.

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