The quality inspection requirements for street light poles include material inspection, size inspection, electrical performance inspection, etc. Through strict inspection, potential quality risks can be effectively discovered and eliminated to ensure the safety, stability and service life of street light poles.
To check whether a street light pole can be called a qualified product, we must start with the overall details.
Most common street light poles are conical. According to the corresponding size, they are cut into trapezoidal plates by a cutting machine, and then the trapezoidal steel plates are rolled into conical round tubes by a bending machine. Let's judge from the following points.
1. Welding. After the steel plate is bent, the rolled conical tube will have an interface. This interface needs to be sealed with a welding submerged arc machine. This weld is very important. If the rollers of the welding submerged arc machine are not synchronized, the steel plates on both sides will be uneven, affecting the appearance. Observe whether there are sand holes in the weld. If there are sand holes, even after galvanizing and spraying, the rust problem of the sand hole part cannot be avoided.
The welding of the flange and the power door should be uniform and flat, because the support force of the entire lamp pole is all below, so the weld must be wide and there must be no leakage. When manually welding the flange, a lot of welding slag will splash in many cases. At this time, slag cleaning is very important and must be done thoroughly, otherwise it will seriously affect the appearance.
3. Check the galvanizing. The thickness of the galvanizing layer should be uniform. It cannot be thick or thin on a pole. Although this does not have much impact, it can be judged that the galvanizing process is defective. Then look at the gloss. Good galvanizing quality is silvery and shiny in the sun. If the surface is dull and matte, it is a low-quality product and will rust soon.
4. Spraying. Spraying is the last process in the production of finished lamp poles. Its anti-rust strength is second only to galvanizing, but it is also crucial. A good spraying process looks smooth and uniform, without leaks, and no variegated colors when you look closely. To test the adhesion of the plastic powder on the pole body, you can use a sharp steel tip to forcefully scratch it in an unimportant place, such as under the flange, to see if the plastic powder on both sides of the scratch is lifted up. If not, it means that the adhesion is qualified. If there is a phenomenon of lifting up, it means that there is a problem with the spraying process. In that case, the spraying of the pole body will cause a large area of spraying to fall off during transportation, affecting the appearance.
At the same time, it will greatly reduce the anti-rust life.
The above points cannot fully summarize the overall process, but if there are no problems with the above points, then this lamp pole can be considered a qualified product.