In-Depth Analysis Of The Crane Slings Precautions
The crane slings in many places can be seen, the production technology of the crane sling is very complex, once we all buy which have no strength of the manufacturer of the sling produced by the sling, there will be a very big problem, causing very serious losses to everyone. So, how to choose the crane sling? Selection of sling specifications, must be lifted load size, weight, shape, as well as ready to adopt the lifting method and other common influence of the use of the mode of coefficient included in the calculation of consideration, give the limit of the working force requirements, at the same time, the working environment, the type of load must be taken into account.
How to choose the crane slings?
In recent years, China’s sling industry is developing rapidly, but the technical standard is very imperfect, so choosing a good crane slings is the key.
First, from the concept to choose the crane slings.
Steel wire rope rigging is processed with steel wire rope as raw material, mainly used for lifting, traction, tension and carrying ropes, specific high strength, light weight, smooth work, not easy to sudden whole broken and other characteristics, widely used in iron and steel, chemical industry, transportation, ports and other industries.
Chain rigging is made of metal chain rings, according to the formation of which there are mainly two kinds of welding and assembly, according to the structure of single and multiple, etc., using high-quality alloy steel, its outstanding features are wear-resistant, high temperature resistance, low ductility, and will not be elongated after the force. Its long service life, easy to bend, suitable for large-scale, frequent use of the occasion. Flexible multi-limb, a variety of combination forms can improve work efficiency, reduce costs.
Sling complete set of rigging by the main ring, link buckles, slings, metal end components, the main ring including long rings, round rings, combined rings and so on. The link shackle includes bow shackle, chain shackle, etc., the sling includes flat belt and round belt, the metal end includes all kinds of hooks and other metal parts, the sling sets can be optimized and combined freely according to the customer’s demand.
Second, from the use of precautions to select the crane slings.
Wire rope rigging lifting attention 1, if the single-legged sling, the lifting point must be vertically located in the center of gravity of the lifted object directly above; 2, if the double-legged lifting, the lifting point should be located on both sides of the goods, the hook in the center of gravity of the lifted object above; 3, if three-legged or four-legged lifting, the lifting point must be located in the plane around the goods proportionally and the hook is located in the center of gravity of the lifted object directly above.
Sling rigging lifting attention 1, in the use of the process, please pay attention to the angle of the relationship between the carrying tonnage; 2, if the complete set of rigging in the use of the crane slings is damaged, it can not be used; 3, to avoid impact or vibration of the load; 4, the safety factor of 41, a specific 51 or 61, to be used within the range of the safety factor.
Chain rigging lifting attention 1, chain in the use of the process does not allow knots or twisting; 2, can not use the hook tip load; 3, chain rigging normal operating temperature -40 degrees to +200 degrees; 4, single-legged rigging, the lifting point should be vertically located in the center of gravity of the lifting object is directly above the center of gravity; 5, 3 if it is a two-legged rigging, the hanging point should be located on both sides of the lifting object, the lifting point is in the center of gravity of the center of gravity above the center of gravity; 6, if it is a three-legged and In the case of three-legged and four-legged rigging, the lifting points should be evenly located at the level of the center of gravity of the lifting object and above the center of gravity of the object to be lifted.
