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Why LED explosion-proof lamp is used in powder coating workshop
The LED beads of the LED explosion-proof lamp use LED lamp beads, which is also a kind of explosion-proof lamp, and the operating principle is the same as that of the explosion-proof lamp. It is a luminaire with various specific measures taken to prevent the surrounding explosive mixture (such as explosive gas environment, explosive dust environment, gas gas, etc.) from being ignited. One of the most important explosion-proof principles of explosion-proof lamps is to limit the temperature of the surface of the casing, parts table or electronic components that are in contact with explosive gases and explosive dust, and the temperature of the electrical contact surface is lower than its small ignition temperature or ignition temperature.
The following are common safety measures in powder coating workshops:
Powder coatings are flammable substances with the risk of burning and dust explosion. In addition, dust can easily cause flying, which is harmful to people's health.
Dust explosion is a place where the powder coating and air are in a mixed state, and the first concentration under the explosion (although the type of coating varies, generally 20-50g / m3, such as the lower explosive concentration of epoxy resin powder is 30g / m3), It can be produced only when there is an ignition source with a small ignition energy (10mJ-40mJ, the ignition energy of epoxy resin powder is 15mJ) or more. For explosion-proof dust explosion, first eliminate the ignition source generated by the oil powder spraying equipment, and control the dust concentration and dust scattering. Specific measures are as follows:
1. Due to the use of high voltage electricity on the electrostatic coating equipment, the insulation of the spray gun and cable needs to be checked regularly;
2. In spraying, the spray gun should not be too close, nor can it touch the grounded conductor.
3. The paint spraying room, air duct, recycling device, transportation chain, hanger, coated object and other technical machinery and equipment must be well grounded;
4. The objects to be painted, hanging utensils, etc. should not fall in the spray booth;
5. The coating film attached to the transportation chain and the hanger should be cleaned regularly to ensure that the coated object is well grounded;
6. The paint workers wear conductive writing and wear dust-removing masks;
7. In hazardous locations, electrical components and equipment should comply with the electrical regulations in the area. Electrical appliances, switch boxes, etc. should be of dust-removing type, and powder should not enter.
It can be seen from the above several safety measures that the lighting electrical equipment in the powder coating workshop must also meet the needs of on-site safety protection. Ordinary lighting fixtures cannot meet this standard. Only explosion-proof LEDs can be used to achieve explosion-proof, dust-proof, waterproof and anti-static These few requirements can effectively guarantee the safety of the scene.