Analysis and solution of the cause of Conveyor roller failure (Part 3)
Molding of ultra-high molecular weight polyethylene roller, the roller wear resistance after car tire and rubber, the other is light weight, no noise, and corrosion resistant corrosion, save electricity; do not hurt tape, easy installation, and other significant characteristics of the reduction of labor intensity.
Severe corrosion of the roller tube body: the coal has little wear to the roller and tape. But in the coal mine and coal washer, steel pipe roller tube body damage, in addition to rotational flexibility difference wear serious, the water contained sulfur corrosion on steel pipe roller tube body is quite serious. The sulfur-containing small mine, the flexible steel tube roller, the tube body is 4.5mm thick, the corrosion penetration time is about two years; In Xinjian, eight iron and steel delta city, the Aiweigou coal mine and Shenmue energy co., LTD. 4.5mm thick steel tube roller, 6 months corrosion. There are also some coal washing plant, chemical plant, alkali factory, salt factory and so on the steel pipe roller corrosion is very serious. At present, the plastic roller has been introduced, and has received a significant effect. However, due to the bad wear resistance, the life expectancy is less than double that of the steel tube. It is not equipped with flame-retardant antistatic property, and is restricted in the mine. Therefore, the corrosion of steel tube roller has not been solved well.
Hongda has several solutions:
1. A roller, which can be used on the ground, can be used to wear rubber abrasion resistant roller, which can not only resist corrosion and rust, but also improve wear resistance by more than 10 times.
2. High molecular weight polyethylene roller with molded molding, or a super high molecular weight polyethylene non-adhesive comb roller.(emphasis: at present, the high molecular weight polyethylene roller extruded in the market has been modified and the molecular weight is very low; Or is ordinary plastic pipe, wear resistance very poor), the molecular weight 250 -- 4 million, not only wear ability is compared with the steel tube to lift 10 times, still do not wear or tear the tape, energy conservation reducing effect is more prominent. If used in underground coal mine, it must be equipped with flame retardant antistatic property. At present, the best ultra-high molecular weight polyethylene flame retardant antistatic modification has a molecular weight of 1.5 million.
