The role of the bracket is to protect the PV module to withstand 30 years of light, corrosion, wind and other damage. The professional design of the product makes the solar PV mounting system can be assembled with only a small amount of accessories, no additional drilling or welding is required, and it can also be assembled quickly on the site, which very effectively improves the efficiency of the installation and shortens the construction period.
Roof brackets are made of hot-dip galvanized carbon steel brackets, and the components are installed on aluminum purlins by backing plate or press block fixing. The fasteners are made of stainless steel. The bracket is designed to withstand winds of 30m/s to ensure the requirements of long-term outdoor use.
Distributed photovoltaic power plant equipment and technical requirements for photovoltaic bracket
I. Material and performance requirements.
1, material requirements: the main material of the selected steel structure is Q235B, welding rod for E43 series welding rod.
2、Mechanical properties requirements: the tensile strength, elongation, yield point, cold bending test and other mechanical properties of the selected steel structure shall comply with the relevant provisions of the Carbon Structural Steel (GB/T700-2007).
3, chemical composition requirements: the content of carbon, sulfur, phosphorus and other chemical elements of the selected steel structure shall comply with the relevant provisions of “carbon structural steel” (GB/T700-2007).
Second, the rust removal method and rust removal grade requirements.
1、Steel members shall be surface treated, and the rust removal method and rust removal grade shall conform to the relevant provisions of the current national standard “Surface rust grade and rust removal grade of steel before painting” (GB8923-88).
2, Rust removal method: Steel components can be descaled by sandblasting or shot blasting, if chemical descaling is used, a treatment solution with more than two functions of rust removal, phosphating and passivation should be used, and its quality should comply with the current national standard “General Technical Conditions for Multifunctional Steel Surface Treatment Solution” (GB/T 12612-2005).
3, rust removal grade: rust removal grade should meet the requirements of Sa2 1/2.
3、Corrosion requirements.
1、Steel members adopt the anti-corrosion method of metal protection layer. Steel brackets are hot dipped galvanized coating, hot dipped galvanizing shall meet the “technical requirements and experimental methods of hot dipped galvanized layer of metal covering steel parts” (GB/T13912-2002) of the relevant requirements, galvanized layer thickness of not less than 80?m.
2, galvanized thickness detection: galvanized layer thickness in accordance with the “metal coverings of steel parts hot dip galvanized layer technical requirements and experimental methods” to provide methods of detection.
3, hot dip galvanizing anti-deformation measures: adopt a reasonable anti-deformation galvanizing program to prevent obvious deformation of the components after hot dip galvanizing.
Fourth, aluminum alloy material
1、Material requirements: The material is generally 6061 or 6063, etc.
2, mechanical performance requirements: the quality of the base material, chemical composition, mechanical properties of the selected aluminum profile must comply with the relevant provisions of GB5237.1.
3、The surface treatment shall meet the technical requirements and conform to GB5237.2-2004 “Aluminum Alloy Building Profiles Part 2: Anodic Oxidation, Coloring Profiles”.
4、The appearance quality of the profile shall conform to the provisions in GB5237.2-2004, and the surface of the profile shall be neat and smooth, and no serious defects such as cracks, peeling, corrosion and bubbles shall be allowed to exist.
In the selection of solar photovoltaic bracket, you can see the products made of different materials, the choice of aluminum alloy material made of bracket and stainless steel material made of bracket have higher practical application value, and different materials of bracket can use the time and installation method also exists a certain difference, can meet the application needs of different places and areas.