Tungsten Carbide Roll Rings, also known as hard alloy roller ring, has been widely used in the rolling production of high-speed wire, bar, threaded steel, seamless steel pipes, etc. due to its good wear resistance, high-temperature hardness, heat fatigue resistance, thermal conductivity, and high strength. Tungsten Carbide Sleeve,Tungsten Carbide Roller, Steel Rebar Rolling,Steel Wire Rod Rolling,WC Roller Luoyang Golden Egret Geotools Co., Ltd , https://www.xtchvaf.com
The Tungsten Carbide Roll Rings we produce mostly come in two series: WC Co and WC Co Ni Cr, with Co and Co Ni Cr as binders ranging from 6wt% to 30wt%. From a usage perspective, hard alloy rollers have good comprehensive mechanical properties, with a bending strength of over 2200 MPa and an impact toughness of (4-6) × At 10 ^ 6J/m ^ 2, the Rockwell hardness (HRA) can reach 78~90. During the high-speed wire rolling process, the single groove steel passing amount is much higher than that of cold hard cast iron or high-speed steel rollers.
Explosion type and location of electrical equipment
What are the requirements for the type of explosion protection and the place of use of electrical equipment?
1: Flameproof electrical equipment has a flameproof enclosure that withstands the pressure generated by the detonation of its internal gas mixture and prevents the ignition of the surrounding mixture around the enclosure after passing through the flameproof gap. This is an explosion-proof type that is currently used more than Zui, but the volume and quality are large.
2: The safety-enhanced electrical equipment is structurally constructed to improve its safety so that it does not generate arcs and sparks under normal operating conditions, nor does it exhibit high temperatures in the flammable mixture. Increased safety electrical equipment is still not widely used in China. It is mainly used in electric motors, transformers, lighting fixtures, etc. It is more economical than other explosion-proof types.
3: Intrinsically safe electrical equipment is an electrical device that achieves explosion-proof electrical energy by limiting the electrical parameters of the circuit and thereby limiting the energy of the spark spark, so that the spark and thermal effects generated by the circuit system are insufficient to ignite the mixture. This type of explosion protection is mainly used on weak current products, such as general control, signals, communication devices and instrumentation. The utility model has the advantages of simple structure, small volume, light weight, convenient manufacture and maintenance, and reliable safety, and is an ideal explosion-proof type.
4: According to the location of explosion-proof electrical equipment, it can be divided into two categories: coal mine (class I) and factory (class II). The former is mainly for biogas (methane) explosion-proof, and the latter is divided into three grades A, B, and C according to the nature of various gas mixtures. Therefore, the electrical equipment used for the explosion-proof conveyor should be reasonably selected according to the type of the place of use, and cannot be arbitrarily changed.