Environmental conditions and materials of explosion-proof hoist
Explosion-proof hoists are widely used in some flammable and explosive dangerous places, and their safety and work efficiency are guaranteed. The environmental conditions and materials of explosion-proof hoists are as follows:
Environmental conditions of explosion-proof hoist: explosion-proof hoist is usually operated indoors, working environment temperature is -20-40℃, relative air humidity is not more than 85% (when the ambient temperature is 25℃), altitude should not exceed 1000m; explosion-proof hoist is explosive When working in a gas environment, the working area is zone 1 or zone 2 as defined in GB3836.14-2000; the use environment of explosion-proof hoists should have good ventilation and necessary facilities.
The material of the explosion-proof hoist: the product label or tonnage plate should be made of brass or stainless steel, and its thickness should not be less than 1mm; when the explosion-proof level is IIC, the wheel tread and rim should not ignite explosive gas mixture due to impact or friction Made of copper alloy or other non-sparking materials; the rollers of the explosion-proof electric hoist cable block and the touch wheel of the travel limit switch should be made of bronze, brass or engineering plastics with a surface resistance of not greater than 109Ω. When the explosion-proof level is IIC The traction wire of the cable trolley should be made of stainless steel wire rope; the rubber buffer should meet the requirements of JB/T8110.2, the polyurethane buffer should meet the requirements, and the surface resistance should not be greater than 109Ω; for the running trolley, the explosion-proof method of manual operation should be adopted. Electric hoist and its wire rope should be made of non-sparking materials.
