Generally speaking, the fixed pulley is at the top and the movable pulley is at the bottom. It is recommended to contact the manufacturer of the gantry crane and ask the after-sales service staff for a video of the wire rope installation. You can use your mobile phone to watch it.
Commonly used steel wire rope varieties are as follows:
1. Phosphated coated steel wire rope (Chinese patent). The steel wire is treated with manganese and zinc-manganese phosphating. The wear resistance of the surface of the steel wire, The corrosion resistance has been comprehensively improved. It is not easy to wear and rust, which greatly improves the fatigue life of the steel wire rope. It is 3 times that of the smooth steel wire rope with the same structure. It can be verified through fatigue tests (the most credible is to do the fatigue test in person), completely replacing all kinds of smooth steel wire ropes. The surface steel wire rope can also be used as an alternative to the galvanized steel wire rope that is first plated and then pulled out with a thin zinc layer (the corrosion resistance can be tested through a salt spray test). It has a long service life, lower unit cost, and better quality stability.
2. Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing. Generally, hot-dip galvanizing has a thick zinc layer and electro-galvanizing has a thin zinc layer.
3. Stainless steel wire rope, with Mainly made of 304 or 316 stainless steel, which has excellent anti-corrosion effect but is expensive
4. Plastic-coated steel wire rope, based on carbon steel wire rope, the outer layer is coated with polyethylene, polypropylene or nylon
5. Smooth steel wire ropes have a short service life and the market demand has dropped sharply. They will be completely eliminated by phosphate-coated steel wire ropes.
6. Steel wire ropes for marine engineering moorings
7. Cable wire ropes
For lifting machinery used in atmospheric environments, manganese phosphating coated steel wire ropes are preferred , hot-dip galvanized-phosphating double-coated steel wire ropes are preferred in heavy corrosive environments, and offshore steel wire ropes are preferred in seawater. When purchasing, please note that the name of the steel wire rope, such as phosphate-coated steel wire rope or 316 stainless steel wire rope, must be indicated on the purchase invoice to prevent unscrupulous companies from infringing upon their legitimate rights and interests. In addition, patented products generally have a patent number spray-marked on the outer packaging of the steel wire rope. , the warranty document should have main technical indicators, such as the type of phosphate coating and film weight (the weight, wear resistance, corrosion resistance, etc. of the phosphating film have an important impact on the service life of the steel wire rope), and are for reference only.