Shockproof floodlight maintenance and overhaul

Before installation, shock-proof floodlights shall be checked against the nameplate and the product specification: type, type, grade, group of the lamps and lanterns; degree of protection of the shell; installation method and fastener requirements for installation. The installation of the luminaire shall be securely secured, the fastening bolts shall not be arbitrarily replaced, and the spring washers shall be complete. The dust-proof and waterproof seals should be placed as they are. When the cable enters the line, the cable and the sealing gasket should be closely matched. The section of the cable should be round, and the surface of the jacket should not have defects such as asperities. Extra inlets shall be sealed in accordance with the type of explosion protection, and tighten the compression nut to seal the inlet.

In routine maintenance, the following points need to be noted:

Earthquake floodlights and lampshades should be able to automatically cut off power before they are turned on. However, due to the complexity of setting up the interlocking device, it is difficult to implement. Therefore, most lamps and lanterns only have warning signs such as “No live-on” on the obvious part of the enclosure. Because the surface temperature of the bulb is still high after power off, if the lampshade is immediately opened, there is still the danger of igniting explosive gas mixtures (mainly flameproof structures). Therefore, incandescent lamps, high-pressure mercury lamps, and high-pressure sodium lamps have high surface temperatures. The shock-proof floodlight that can quickly open the cover should pay attention to this point.

When replacing a lamp (tube), the lamp shall be properly protected from damage; the cleaned surface shall be coated with a phosphatized paste or 204-1 anti-rust oil; no paint shall be applied on the surface; there shall be no rust on the surface, if any Slight rust, no pockmarking after cleaning. The seals used for dust protection and waterproofing must be kept intact. This is very important for the increased safety lighting. If the seal is seriously damaged, replace it with a seal of the same size and material and replace the entire light if necessary. When overhauling, pay attention to whether the lampshade is intact and replace it immediately if it is broken.

Portable floodlights are divided into two types: feed-grid power supply and self-contained power supply. For lamps powered by the feed-in network, rubber-sleeved cables shall be used between the explosion-proof junction boxes (boxes) or explosion-proof plugs and the lamps. The grounding or connection of the neutral conductor shall be within the same jacket; the cable shall adopt the minimum allowable cross section of the main conductor core. 25 mm2 YC, YCW heavy duty rubber cable. One point to be emphasized here: The cable for portable lighting does not allow intermediate connectors. There has been such an accident: one night to repair the ethylene pump, then the second temporary lighting, explosion-proof signs for the dIICT4. When the fitter took up the lamp and looked closely at the pump body, it ignited the ethylene gas leaking from the pump body and burned one of its faces. After checking the explosion-proof performance of the lamp is normal, the problem lies in the lamp's cable. Originally, there was a cable connector 15m away from the lamp, which was wrapped with an insulating wrap. When the cable was connected to the lamp, it was dragged on the ground to expose the cable core. When the fitter lifted the lamp to illuminate the pump body, the exposed wire core hit the base channel of the equipment. , 遂 遂 打 打 打 打 打 打 打 打 打 打 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 This accident exposed the loopholes in our explosion-proof safety management. After the accident, we conducted a thorough inspection of all portable lamps and their cables to eliminate the hidden dangers of similar accidents. This accident tells us that in the management of explosion-proof electrical safety, there must be no luck mentality. We must do it in strict accordance with relevant regulations and requirements in order to be foolproof.