Many people use cable tray construction to think that it is only necessary to understand the problems related to its installation. Other contents are not very important. This is a big mistake. Only by understanding from many aspects can we better use the cable tray without problems. Let's learn about other aspects,
The cable tray is made of steel and consists of straight sections, elbows, accessories, tray supports and hangers, ladders, etc. it is the general name of the continuous rigid structural system used to support cables. Cable trays attach and support cables to buildings (structures) through their own structural characteristics, or independently support cables through tunnels or caves, underground, air, etc., mainly to support cables. At the same time, because the cable tray isolates the cable from the outside world, it also plays an important role in protecting the cable, which is convenient for the scientific layout and management of the cable to a great extent.
Composite anti-corrosion treatment of galvanized powder or paint
Whether the technical quality of the surface treated cable tray meets the requirements of product process and related usability can be determined by the coating thickness, surface passivation, zinc layer adhesion, zinc layer uniformity, appearance, impact strength, flexibility, edges and corners, etc. Coverage and other indicators.
As for the environmental test of anti-corrosion coating, it is necessary to strictly distinguish different types of indoor and outdoor environments. Alternating damp heat, salt spray test and chemical corrosive gas test shall be carried out according to corresponding method standards. For the UV condensation test, compared with indoor, UV mainly exists in the outdoor environment, so the lighting conditions and duration must meet the corresponding requirements to avoid large deviation between the measured data and the actual data.
During the test, the corresponding technical indicators shall be selected according to the specific surface treatment methods and use requirements, instead of all the above indicators for each type.
At the same time, in order to meet the fire resistance requirements, the fire resistance requirements shall also be considered during the protective treatment. If the anti-corrosion coating cannot meet the fire resistance and fire resistance requirements, it shall also be treated by coating fire-resistant coating.
According to different requirements for fire endurance time, the fire endurance of fire-resistant bridges is divided into three grades in relevant technical specifications: nh1, NH2 and NH3. The fire resistance test shall be carried out according to relevant product standards. The fire-resistant coating on the surface of the fire-resistant bridge shall meet the technical quality requirements such as coating adhesion, bending resistance, impact resistance, water resistance, thickness and freeze-thaw resistance.
In order to more truly simulate the actual use scenario, when testing the fire resistance rating of fire-resistant cable trays, there should be not only fire-resistant cable trays with at least two straight sections, but also enough connectors. Meet the actual use conditions and test requirements. Condition of cables.
After the column support and fire-resistant cable tray are installed in the test furnace in turn, the test cable must be laid in the fire-resistant cable tray according to the corresponding requirements. During loading, the loading point should avoid the test cable.
Jinan cable tray manufacturers believe that cable trays of different materials and structural forms have different functions, and the protection of cables is also diversified. In practical application, appropriate cable trays shall be selected according to local conditions and inspected according to relevant specifications to ensure product quality. Standardize the construction and ensure the quality of relevant projects.
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