This article will enumerate the selection of photovoltaic brackets for large-scale distributed photovoltaic power plants, common cement roofs and colored steel tile roofs, which does not involve the installation of glazed tile brackets for ordinary residents.
Cement roof bracket selection
The most common is a flat cement roof, and there are a few arched cement roofs (such as granaries). Most of the flat cement roofs have an inclination of fewer than 10 degrees, which is convenient for rainwater to fall
One. Cement counterweight method
1.1 Pouring cement pier on cement roof, this is the most common installation method
Pros: Stable without breaking roof waterproofing
Disadvantages: It requires a lot of labor and time. The cement pier needs more than a week of curing and curing time. The bracket can be installed only after the cement pier is completely cured. A large number of prefabricated molds (cement molding) are required.
1.2 Precast cement counterweight
Advantages: Relative to the time required for making cement pier, it can be set as counterweight cement brick in advance, saving cement buried parts
2. Steel Structure Link
Make flanges at the bottom end of the pillars of the bracket, and use galvanized steel to connect several bracket arrays together. 500KW or even one megawatt or more as a unit. Use the weight of the bracket array to increase wind resistance. You only need to make a few types of cement on the roof support Pier, fixed large support array
Advantages: Quick and easy installation and easy removal
Disadvantages: the construction cost is too high, the cost of the bracket is not less than 1 yuan per watt
three. Chemical anchor bolt
For prefabricated floor workshops, the unit area is relatively large. A 5 cm thick cement layer can be made on the roof, and then the brackets can be fixed with chemical anchor bolts, which will not damage the roof waterproof layer when drilling. At present, there are only a few projects in China. Life is to be tested
Advantages: anchoring without expansion force, easy construction, and cost-saving
Disadvantages: poor heat resistance, failure at high temperatures, not solderable
four. Installation of two-component tendons for special power stations
Advantages: Save time and effort, save columns
Cons: Higher cost
Color steel tile roof bracket selection
The color steel tile factory building is easy to install, but the domestic color steel tile has a life span of about 10-15 years. It is difficult to overhaul after installing a photovoltaic power plant, and there are too many hidden dangers. Personally, most domestic color steel tile roof power plants are time bombs.
There are three kinds of color steel tiles most commonly: upright hem type, corner type, and ladder-type.
For upright hemming and angle-chipping color steel tiles, the wave crests of color steel tiles are mostly used, and special aluminum alloy fixtures are used to fix the support rails.
The life of color steel tiles is about 10-15 years, and the load capacity is 15-30kg per square. Most of them are installed by tiles.