The arrangement of the wire ropes on the drum generally relies on the action of the rope arranging device to achieve the purpose of neatly arranging the wire ropes. The function of the pulley is to change the direction of the wire ropes, for reference only
China's annual output The 1.8 million tons of steel rope ranks first in the world. Phosphate-coated steel wire rope is a revolutionary innovative technology in the world of steel wire ropes. The service life (fatigue life) has greatly increased. Smooth steel wire ropes have been completely eliminated, and the era of phosphate-coated steel wire ropes has fully entered:
1. Phosphated coated steel wire rope (Chinese patent), after manganese or zinc-manganese phosphating treatment, the wear resistance and corrosion resistance of the steel wire surface are fully improved, GB/T11376-1997 Metal Phosphate The national standard for conversion coating has a detailed introduction to the wear resistance and anti-rust effects of the phosphating film. The grease penetrates into the pores of the phosphating film and has an extremely excellent friction-reducing effect, effectively inhibiting the wear of the internal steel wire surface of the steel wire rope. It is the best choice for smooth steel wire ropes. Upgraded products can be used instead of galvanized steel wire ropes that are first plated and then pulled out with a thin zinc layer. Currently, the fatigue life of phosphated ropes is about 3 times that of smooth ropes, and the best ones are 4 times. The length of fatigue life can be compared through fatigue tests. With in-depth research on wear-resistant phosphating liquid, the service life can also be greatly improved. The phosphating film is 3-60 g/m2. The steel wire is directly twisted into a wire rope without drawing processing after phosphating.
Note: Do not confuse zinc-based phosphating for drawing with manganese-based or zinc-manganese-based phosphating for rope making wire. This technology is suitable for the production of a variety of wire ropes, such as elevator wire ropes, important purpose wire ropes, mining wire ropes, anti-rotation wire ropes, wire ropes for oil production, wire ropes for pile drivers, etc. It has a longer service life, lower usage costs, and better stability. . .
2. Galvanized steel wire ropes include hot-dip galvanizing and electro-galvanizing. The direct-lift hot-dip galvanized steel wire has a thicker zinc layer. The thicker the zinc layer, the stronger the corrosion resistance and the longer it will last. Electroplated zinc is thinner. Since the phosphating coating has certain anti-corrosion properties, manganese phosphating coated steel wire ropes can be used instead of some types of galvanized steel wire ropes with thin zinc layers, such as high-temperature environments with atmospheric but humid air, while hot-dip galvanizing-phosphating double The corrosion resistance of coated steel wire ropes is further improved.
3. Stainless steel wire rope, a steel wire rope twisted with stainless steel wire, such as 304 or 316 stainless steel, has higher corrosion resistance than hot-dip galvanized carbon steel wire rope, and is relatively expensive. The stainless steel wire is treated with manganese phosphorus Chemical coating treatment (phosphating stainless steel wire requires a special phosphating formula) can also greatly extend the service life.
4. Plastic-coated steel wire rope. Based on the steel wire rope, the outer layer of the steel rope or strand rope is coated with polyethylene or polypropylene.
5. Smooth steel wire ropes were produced in the United Kingdom in 1834. In China, Tianjin No. 1 Steel Wire Rope Factory began production in 1939 (it went bankrupt in 2005). As phosphate-coated steel wire ropes enter the market in large quantities, they will be phosphorized. Chemically coated steel wire ropes will be completely eliminated.
6. Steel wire ropes for marine engineering mooring, relevant standards are in the process of formulation and approval
7. Cable wire ropes
Manganese phosphating coating is preferred for atmospheric environment For steel wire ropes, hot-dip galvanized-phosphated double-coated steel wire ropes are preferred in corrosive environments. Marine steel wire ropes are preferred in seawater environments because they have longer service life and lower usage costs.