In places with explosive gas risks, such as crude oil, chemical plants, and coal industries, lighting equipment inevitably causes spark discharge or produces hot surfaces during work. Once the lighting equipment encounters the explosive gas mixture on the production or rescue site, explosion events will occur. As the most commonly used lighting equipment, explosion-proof lamps application and maintenance have long caused widespread concern and attention.
Daily maintenance In the daily maintenance, the following points need to be noted. Explosion-proof lamps and lampshades should be able to cut off the power supply before opening automatically. But because of the complexity of setting interlocking devices, it isn’t easy to achieve. Hence, most lamps and lanterns are only in the shell of the prominent place to put “strictly forbidden to open with electricity” and other words warning signs.
Because the surface temperature of the light bulb is still very high after the power failure, such as immediately opening the lampshade, there is still the risk of ignition of explosive gas mixtures (mainly refers to the explosion-proof structure), so incandescent lamps, high-pressure mercury lamps, high-pressure sodium lamps, these light bulbs with high surface temperature light source, and can quickly open the cover of the lamps to pay attention to this point. The author’s unit uses more CeY-1-type explosion-proof fluorescent lamps with an interlocking mechanism to open the lid and cut off the power, providing convenience and safety for maintenance work. Because fluorescent lamps are cold light source lamps, there is no high surface temperature, and the cover can be opened immediately after the power failure.
When replacing the light bulb (tube), the explosion-proof lamp explosion-proof joint surface should be adequately protected from damage; after cleaning, the explosion-proof surface should be coated with phosphate paste or 204-1 antirust oil, is strictly prohibited to paint other paints; explosion-proof shell shall not have a rust layer, such as lighter rust after cleaning should be no pockmarked phenomenon. Used for dustproof, waterproof with the seal must be intact, which is very important for safety-enhancing lamps and lanterns. If the seal is seriously damaged, it should be replaced with the exact specification and material, and if necessary, the whole light should be replaced. When inspecting, pay attention to whether the lampshade is intact, and replace it immediately if it is broken.
Regular maintenance and repair 1 Maintenance and repair personnel need to be trained to understand the performance of lamps and lanterns and precise use requirements. Maintenance personnel must have professional knowledge and be familiar with the structure of lights and lanterns.
2 Regularly eliminate the dust and dirt on the explosion-proof luminaire shell to improve the luminous efficiency and heat dissipation performance. The cleaning method can be based on the protective capacity of the luminaire shell, using water spray (above the sign-in on the luminaire) or wiping with a wet cloth. When spraying water, cleaning, should cut off the power supply, and it is strictly prohibited to scrub the plastic housing of lamps and lanterns (transparent parts) with a dry cloth to prevent static electricity.
3 Check the lamp’s plastic shell (transparent parts) has no severe discoloration, such as serious discoloration, indicating that the plastic has been aging. Check whether the fine details have been impacted by foreign objects traces, whether the protection network has not loosened, desoldering, corrosion, etc. If there is, it should stop using, and timely repair and replacement.
4 Light source damage should be promptly shut down. The light notifies the replacement to avoid the light source can not start and the ballast and other electrical components being in an abnormal state for a long time.
5 Humid environment used in the lamp cavity of lamps and lanterns, such as water, should be removed promptly, replace the sealing parts to ensure shell protection performance.
6 When opening the lamp cover, the cover should be extended according to the warning sign after the power is off.
7 After opening, the cover should be checked in passing whether the combination of the explosion-proof surface is intact, whether the rubber seal is hardened or sticky, whether the wire insulation layer is green and carbonized, whether the insulating parts and electrical components have deformation and scorch marks. If these problems are found, should be timely repair and replacement.
8 Repair and replace the model’s light source, parts, and electrical components, specifications, size, performance, and repair and replace the light source, features, and electrical components before the same.
9 Off the cover before applying a wet cloth (not excessively damp). A light wipe lamps and lanterns back to the light and transparent parts to improve the lighting efficiency. The explosion-proof combination surface should be thinly coated with a layer of 204-1 replacement rust-proof oil; closing the cover should pay attention to whether the seal is in the original position to play a sealing role.
10 The sealed part of the luminaire should not be frequently disassembled and opened.