Explosion-proof distribution box is a kind of distribution box with explosion-proof performance. There are mainly explosion-proof lighting distribution boxes, explosion-proof power distribution boxes, explosion-proof and anti-corrosion distribution boxes, etc. BXM (D) explosion-proof distribution box is suitable for power distribution and wiring in flammable and explosive places such as petrochemical installations, oil platforms, chemicals, pharmaceuticals, coal, smelting, shipbuilding, military industry, and textiles. Explosive gas atmospheres in Zone 1 and Zone 2. Areas 20, 21, and 22 are combustible dust environments.
1. Historical background of explosion-proof distribution box
With the rapid development of industries such as petroleum, chemical industry, military industry, engineering, factories and mines, and mining, explosion-proof distribution boxes are more and more widely used in production, storage, and rescue, and there are more and more varieties. How to prevent accidental explosions of explosion-proof distribution boxes in explosive gas hazardous areas has become a very important issue. Because explosion-proof distribution boxes inevitably generate electric sparks during work, once they meet the explosive gas mixture at the production or rescue site, it will cause an explosion accident, directly endangering national property and the lives of citizens. Therefore, as the most widely used lighting fixture, its explosion-proof technology has already attracted widespread attention and great attention.
2. The scope of application of explosion-proof distribution boxes
2.1 Hazardous places with explosive gas mixtures: Zone 1 and Zone 2.
2.2 Explosive gas mixtures: IIA, IIB, IIC.
2.3 Combustible dust environment Zone 20, Zone 21, Zone 22
2.4 Temperature group: T1～T6.
2.5 Explosion-proof marks: ExdeⅡBT6, *ExdeⅡCT6.
Specifically summarize the use of places such as indoor and outdoor workplaces, China's coal industry, PetroChina, Sinopec, CNOOC, electric power, metallurgy, railways, steel, ships, troops, aerospace, public security fire protection, chemicals, government departments, venues, transportation, And the applicable needs of large enterprises. Note: Please specify if you require ⅡC level.
3. Main classification of explosion-proof distribution boxes
Explosion-proof distribution box is divided into: explosion-proof lighting box, explosion-proof power box, explosion-proof control box, explosion-proof control cabinet, explosion-proof power distribution cabinet, explosion-proof operation box, explosion-proof box, explosion-proof starter box, explosion-proof motor starter, explosion-proof soft starter, explosion-proof frequency conversion Box, explosion-proof star delta starter box, explosion-proof self-coupling step-down starter box, explosion-proof magnetic starter box, explosion-proof power socket box, mobile explosion-proof box, BMG explosion-proof distribution box, etc.
4. How to use the explosion-proof distribution box
4.1 According to the actual lighting needs of the work site, determine the installation position and method of the lamp, and then prepare a three-core cable of the corresponding length according to the distance from the lamp to the 220V power contact (if steel pipe wiring is used, lead the three-core cable into the steel pipe to the lamp place of installation).
4.2 First remove the fixing screws on the wiring cavity, pull out the wiring part of the junction box; take out the sealing ring and connector (with set screws) from the packing box, and insert the cables in sequence; then connect one end of the three-core cable to the Into the mark "L", "N" and the grounding place in the box, press the cable with the crimping clamp, and fix it with the fastening screw, then tighten the connector, compress the sealing ring, and tighten the fastening screw from the side.
4.3 Screw the parts in step 2 into the steel pipe, install the set screws from the side and lock them, then install the lamp body along the guide rail of the junction box, and then tighten the screws on the panel.
4.4 Finally, connect the other end of the three-core cable to the 220V power supply according to the requirements of the explosion-proof distribution box.
4.5 When replacing the bulb, first cut off the power supply, then remove the set screw on the housing with a hexagonal wrench, loosen the lamp cover 6 turns with a large screwdriver or other tools, then carefully remove the lamp cover slowly by hand, unscrew it Replace the old light bulb with a new light bulb.