Concrete roof and steel plant rooftop solar power station mine plan
First, the concrete roof photovoltaic power station lightning directly stroke prevention program
Photovoltaic system on the roof of the mine design some basic requirements:
PV system lightning protection design, we must first determine the level of the mine where the project, choose the design of the mine level required to use the materials, including air terminals, deflectors and more. According to the particularity of photovoltaic power plant project, all stations can be attached to the roof of the mine where the main structure of the system architecture, to design without a separate stand-alone lightning protection system, so not only can save construction period, the funds, but also can take advantage of existing resources. For concrete structures, most of the buildings in the construction period have done a professional lightning protection system, made of concrete structures in general will do when lightning protection system with lightning or lightning network.
Junction with the main structure of the lightning system
Some do deflectors external lightning protection system connected through the wall sleeve with her daughter air terminals, in which case we can poke the sleeve, lightning deflectors directly connected photovoltaic power plant on the parapet deflectors on, did not do mine welded steel casing directly online at lightning. Lap length welded parts should meet specifications, welding parts to remove the skin before doing drug coating.
The second case the original structure would do inside the mine, the main structure is reinforced as deflectors, in which case we can deflectors connected to the air terminal, may lack the receptor, so this time you can increase the number of air terminals and more to do on the column bracket system. Air terminals installed as follows:
1, the first bearing steel plate fixed on the post stent system PV power plant, a co-welded plates;
2, then the lightning rod erect, looking straight alignment after spot welding, and then be corrected, solder the other three ribs;
3. Finally, the deflectors welded on the floor, remove rust drug skin brush.
PV power plant system is the weakest border PV modules, taking into account various factors such as the cost of the environment, the choice of hot-dip galvanized steel as the material used in lightning protection devices. Lightning rod should be used when the bar or hot dip galvanized steel pipe, its diameter should meet the following requirements: rod length 1 m or less, the bar should not be less than 12 mm, steel is not less than 20mm; 2 rod length 1 ~ 2 m, the bar should not be less than 16 mm, steel not less than 25 mm; 3 independent chimney rod, bar not less than 20 mm, steel not less than 40 mm. Lightning rod lightning hemispherical end should be made, it is appropriate for the minimum bend radius 4.8 mm, suitable for a maximum 12.7 mm. Overhead contact lines and flashing lightning network should adopt the section is not less than 50 mm2 hot galvanized steel or copper wire. Photovoltaic system lightning rod should be connected to the PV system uprights, connected between the plates should be durable electrical through, copper-zinc alloy can be welded, welding, crimping, press-stitched, screw or bolt connection. Taking into account the environmental impact of construction difficulty surrounding the use of welding better. Do best done after welding node processing, good corrosion and fire.
Second, Steel plant rooftop solar power station anti Watch program
2.1 steel roof photovoltaic power station plant basic ideas of mine
Steel plant photovoltaic power plants with concrete ideas Lightning general idea is similar to the choice of air terminals, deflectors choice, connecting material are similar to concrete roof. But for steel roofing, steel mine with concrete due to different concrete with separate lightning protection system, full air terminals, deflectors, grounding device. But for the steel roof, it does not separate lightning protection system, the entire structure of formula a good conductor, lightning can be directly imported into the grounding device, some steel knot
Constitutive plant did not even air terminals, so it has a photovoltaic power plant steel roofing, deflectors can be directly connected with the steel roofing, steel roofing with girders connected together in order to achieve the purpose of lightning. We just need to attach photovoltaic power plant in lightning protection system lightning protection system of concrete structures can achieve the purpose of the mine.
Steel construction at the mine, then you can do the jig on the next lightning steel, welded construction completed before the next PV mounting system, between the board and the board are connected with copper wire, self-tapping screws with countersunk head hit the board to go inside or attached to the bolt panels.
2.2 Steel plant roof power plant embodiments
Light steel buildings in accordance with, the use of heavy lightning significant, and the entire exterior of the building is not in harmony, and the use of metal roofing to do air terminals, the need to meet the "Lightning in design" (version GB50057-2010) Section 4.1. 4 shows the four requirements. Regulatory requirements for "metal plate when no flammable items below, the thickness of not less than 0.5mm", workshop building envelope (roof) hot-dip galvanized steel, substrate thickness 0.53mm (including galvanized layer), Add a glass roof pad under 75mm thick, wrapped in aluminum foil, with φ1.5 stainless steel mesh layer on care and purlins edge site. Copper wire to the battery plate and structural steel linking request has reached the roof of the mine plant, joints do embalmed. Steel plant connection with some places there may be a barrier paint conductive properties, it is sometimes necessary to peel off the skin, well after the node connections, such as corrosion and rust do, otherwise reach the goal of mine.
Conclusion:
Concrete roof and steel plant rooftop solar power station lightning basic idea is that the new system will be attached to the original structure and lightning protection systems, in order to achieve the purpose of lightning.
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