This utility model patent is a flameproof distribution box suitable for natural environments of hazardous chemicals in Zones 1 and 2, as well as for flammable gases of IIA, IIB, and IIC categories. It is commonly made by aluminum shell die casting or stainless steel plate welding, with the surface treated by electrostatic spraying. The box is generally composite, internally fitted with various explosion-proof electrical appliances. According to the customer's electrical principle diagram and key performance parameters, the box size is determined and the appropriate explosion-proof appliances are selected. The control panel can be made for immediate use or for operation behind the door, as per requirements.
The company's products are widely used in facilities handling flammable and explosive materials, such as coal mines, crude oil, chemical plants, gas stations, metallurgical industries, gas supply, textile manufacturing, and food processing. During production, there is a high risk of flammable gases, explosive mixtures, and dust leaks. When flammable and explosive gases encounter general lighting fixtures and distribution boxes, explosions can easily occur, posing a severe threat to employee safety. Therefore, machinery and equipment in such locations require explosion-proof distribution boxes and electrical appliances for lighting fixtures and certain household appliances.
The explosion-proof box differs from the general distribution box.
In terms of appearance design, general distribution boxes are typically made of iron casings, whereas explosion-proof distribution boxes are produced by welding castings or stainless steel plates, offering high compressive strength.
In terms of construction, electronic components in general distribution boxes can be neatly arranged for easy wiring, whereas in explosion-proof distribution boxes, some modules require protective measures for each power switch and electrical component.
In terms of sealing, general distribution boxes have less stringent sealing requirements. The sealing between the explosion-proof distribution box cover and the machine cover is quite good. After passing rigorous inspections, a special organization issues a certification of compliance, and they are then sold in the market upon leaving the factory.
In terms of application, general distribution boxes are generally suitable for civil use and locations without fire prevention requirements. Explosion-proof distribution boxes are applicable for risk areas and locations with flammable and explosive materials.
In terms of pricing, standard distribution boxes are quite cost-effective. Explosion-proof boxes are more expensive, often several times pricier than standard distribution boxes.
