Photovoltaic support has many kinds of classification methods, such as welding and assembly according to the connection mode, fixed and day-to-day according to the installation structure, ground and roof according to the installation location. No matter what kind of photovoltaic system, its bracket structure is basically similar, including connectors, columns, keels, beams, accessories and other parts.
1.1 fixed photovoltaic support
Fixed photovoltaic support, as its name implies, refers to the support system that keeps the azimuth and angle unchanged after installation. Fixed installation method directly places solar photovoltaic modules in low latitudes (at a certain angle with the ground), and forms solar photovoltaic arrays in series and parallel, so as to achieve the purpose of solar photovoltaic power generation. There are many fixing methods, such as pile foundation method (direct embedding method), concrete block weight method, pre-embedding method, ground anchor method, etc. The fixing methods of roof vary with the different roof materials.
The support of solar cell arrays is usually fixed by hot-dipped galvanized steel products or stainless steel anchor bolts extending from reinforced concrete foundations. When the concrete foundation is used on the roof of a building, the waterproof layer of the building is uncovered and the concrete surface is stripped. The steel bars of the concrete base used in the array are welded together on the steel bars of the patio. When steel bars cannot be welded, in order to resist wind pressure by means of the adhesion and self-weight of concrete, the surface of concrete base is uneven and the adhesion is increased. After that, waterproof filler was used for secondary waterproofing treatment.
If the above method can not be implemented, weatherproof buffer materials such as expensive silica gel can be laid on the waterproof layer, on which a heavy steel framework with hot dip galvanization can be installed, and then the array bracket can be fixed on the steel framework. Steel skeleton is connected by plastic bolts to the overhanging eaves wall around the house. The purpose is that the wind pressure does not cause the array and the steel skeleton to move. It plays an auxiliary and intensifying role.
1.1.1 roof photovoltaic system support
The installation environment of roof photovoltaic support includes slope roof and flat roof, which should conform to the roof environment without damaging the inherent structure and self-waterproof system. Roof materials include glazed tile, color steel tile, linoleum tile, concrete surface, etc. Different support schemes are adopted for different roofing materials.
The roof can be divided into slope and plane according to the inclined angle, so there are many choices for the inclined angle of roof photovoltaic system. For the sloping roof, flat roof is usually used to conform to the gradient of the roof, or a certain inclination with the roof can be used, but this method is relatively complex and there are few cases for flat roof. The roof has two choices, one is tilting and the other is tilting at a certain angle.
There will be different bracket systems for different roofing materials.
1) glazed tile roof bracket
Glass tile is a kind of building material made of hard and soft materials such as alkaline soil and purple sand, which are extruded and burned after plastic pressing. Its material is brittle and its bearing capacity is poor. When installing the bracket, the special designed main supporting member is usually fixed with the glass tile roof to support the main beam and cross beam of the bracket. The supporting member, such as the connecting plate, is usually designed as a multi-hole type to flexibly and effectively adjust the position of the bracket. Aluminum alloy pressing joint is used between the component and the cross beam.