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HOME >> NEWS >> Technical Introduction of Anti-thunder for Steel Storage Silo

Steel silo lightning protection and grounding system design principles: 1, material steel silos mine design should be consistent with the current national standard "Building Lightning Protection Design Code" GB 50057 lightning protection requirements in the second class of mine buildings.

2, the tower should be set up on the roof lightning network (band), a needle or the use of metal components as air terminals. Roof lightning network mesh size should not exceed 10m × l0m, 12m × 8m. When the bucket elevator up the tower roof, should be set up lightning protection, lightning rod should be welded with the operating platform and from the bucket elevator 3m, the scope of protection should be higher than the top of the bucket elevator 2m or more. Lightning network (belt), needles, metal components and operating platform should be firmly connected with the deflectors, deflectors can be set in the following manner:

1) When the tower of reinforced concrete structure, with its main steel structure through long, every place not less than 2, the main steel must be welded connections.

2) Working tower or bucket elevator tower metal welded structure, using its own.

3, the material should be designed using steel silos mine fence and the warehouse roof warehouse corridor for air terminals. Bin on top of the fence through the Gallery and warehouse shall be welded linked. Deflectors are available galvanized flat steel, galvanized flat steel cross-section of not less than 48m㎡ thickness of not less than 4mm.

4, the number of working tower steel silos deflectors and each material shall not be less than 2, the spacing should not exceed 18m, and respond to said layout.

5, grounding devices can use basic steel, vertical and horizontal reinforcement shall be welded connected, its impulse grounding resistance should not exceed 10Ω. When not connected to the warehouse group basis and foundation left Deformation, should be flat or round steel welding connected and stay the full amount of deformation. Flat-section of not less than 100m㎡ thickness of not less than 4mm; bar diameter not less than 12mm.

6, architecture, metal pipes, process equipment should make anti-static grounding, grounding resistance should not exceed 100Ω. Anti-static grounding, lightning protection and grounding, protective grounding device should merge settings, which should meet the minimum grounding resistance requirements.

7, using the full range of low-voltage lines should be buried cable laying; overhead lines should be forwarded to the introduction of armored cable buried in the home office, the buried length of not less than 15m and surge arresters should be installed at the transfer office. Cable's metal skin, surge arresters and insulators iron pin should be connected with the lightning protection and grounding devices or separately grounded.