Introduction to photovoltaic support and module installation (collection)

1、 The types of photovoltaic brackets can be divided into fixed brackets, tilt adjustable brackets and automatic tracking brackets. The details are as follows:

       Although the cost of various supports accounts for about a few percent of the total PV system cost, weather resistance is the main consideration when selecting PV supports. The PV supports must be firm and reliable in structure within a 25 year life cycle. Type selection needs comprehensive consideration: Durability, safety, and whether maintenance free and recyclable. The following is a comprehensive comparison between the fixed support and the fixed support in terms of scope of use, power generation, floor area, cost, reliability, etc.:

2、 There are three kinds of common materials for photovoltaic support: hot-dip galvanized, galvanized aluminum magnesium, and weathering steel. (Other composite materials)
1. Hot dip galvanizing The process is a relatively stable and reliable steel surface treatment scheme to resist environmental corrosion, and is also a common and commonly used anti-corrosion material for solar photovoltaic brackets. The thickness of the traditional hot-dip galvanized support is generally more than 2mm, and it can reach 2.5mm in windy areas  。

Remarks: cold galvanized coating Anticorrosion is mainly carried out through electrochemical principle, thickness 3-5um 。 Hot dip galvanizing It is a method of immersing steel components in molten zinc to obtain metal coating Method, thickness More than 10um 。 The corrosion resistance of hot galvanizing is higher than that of cold galvanizing, which will rust within three months.
The overall appearance of hot-dip galvanizing is slightly rough, which will produce process water marks, dripping tumors, etc., especially at one end of the workpiece, the overall appearance is silver white. The surface of cold (electric) galvanizing is relatively smooth, mainly yellow and green. Of course, there are colorful, blue and white, green light and so on. The whole workpiece is basically free of zinc nodules, caking and other phenomena.

2. Galvanized aluminum magnesium photovoltaic support Then alloy metal plates are used, and the main components are zinc, aluminum, magnesium, etc. Because of the addition of alloy elements, the product has the characteristics of self-healing incision, and the metal surface also has the characteristics of chlorine resistance, alkali resistance, wear resistance and corrosion resistance. 3. Weathering steel photovoltaic support As the name implies, it is made of weathering steel through research, development and production. It has the mechanical properties of high-quality steel, and its atmospheric corrosion resistance is 2~8 times that of carbon steel. The longer the service time is, the more outstanding the corrosion resistance is. The surface of weathering steel is a dense rust layer formed by processing, so the appearance is rust color, which is the method of "stopping rust with rust". 3、 The PV support is composed of Column, inclined beam, diagonal brace, purlin, tie rod, base, universal angle, connector, end cover, etc.

4、 The installation of photovoltaic support shall be in accordance with the construction specifications of photovoltaic power station, electrical installation, Building Construction and other specifications The installation steps can be divided into: column, inclined beam, diagonal brace, purlin and tie rod installation.
1. Column and inclined beam installation:
(1) First, connect the column and inclined beam on the ground with triangular connectors and fasten them with (M12) bolts. (2) After the column and inclined beam are assembled, lift the combined body and place the front and rear columns on the pile top sleeve.

(3) After placing the column, place the slope gauge on the inclined beam, and then adjust the height of the front and rear columns according to the reading; After adjusting the height of the column, tighten the socket bolt screws to fix the column; Each support unit shall first fix the columns and inclined beams at both ends 。

(4) After the column is fixed, fix the purlin on the inclined beam with bolts, and then hang a long thin line on the upper and lower ends of the inclined beam at both ends of each support unit.

(5) The height of the column and inclined beam connector between units shall be adjusted according to the fine lines hung at the upper and lower ends. After adjustment, the column shall be fixed with bolts.

(6) After all the columns of the support unit are fixed, align the drill with the reserved holes on the sleeve and punch through the columns; Then bolt the column permanently. (one flat washer, one spring washer)

2. Installation of diagonal bracing:
(1) One end of the diagonal brace is fixed on the diagonal beam with a triangular connector, and the other section is connected to the column with a diagonal brace hoop. The practice of the front and rear diagonal braces is the same.

3. Purlin installation:
(1) Now the purlin of a unit is fixed with purlin connectors on the ground, and then a group of workers lift the purlin to the purlin bracket with tools, and finally fixed firmly with bolts.

4. Assembly installation includes bolt installation and pressing block installation:

(1) Pre tightening pressure block

(2) PV module positioning.

(3) Fasten the pressing block

(4) Pre tighten the intermediate pressure block

(5) Install one by one from one side to the other, then tighten the fastening bolts of the photovoltaic panel, and check that the direction and position of the control box on the back of the photovoltaic panel are consistent. （ The required torque of the bolt fastening the pressure block is 14-20N * M )

(6) Installation of protective ground wire: the grounding bolts on both sides of the support shall be connected to the same grounding bar

(7) Install the return box:

(8) Install cable to combiner box:（ Three photovoltaic panels are connected in series as a group, and cables are installed to the combiner box).

(9) Fixed cable (fixed with tie)

5. Pull rod installation:
(1) The straight brace of the purlin and the tie rod of the rear column can be installed after the installation of the components. First, pass the hot brace through the reserved hole, and then fasten it in place with bolts.

(2) Installation of tie rod between rear columns: first connect the tie rod between rear columns and the tie rod hoop between columns, then connect the tie rod hoop between columns and the rear column, and then fasten with bolts.

(2) Install the high hoop first, then the low hoop

(3) Check the tightness of the installation.