LR03 alkaline battery.A brief discussion on the installation and construction technology of photovoltaic power station components

　　1. Preparation work before installation Construction preparation work is an important prerequisite to ensure the smooth construction of the project and the comprehensive completion of various indicators. It is a planned, step-by-step and staged work, not only before construction, but also throughout the construction. The whole process. Technology... Keywords: photovoltaic power station, photovoltaic module, solar array, array bracket.

　　1. Preparations before installation

　　Construction preparation is an important prerequisite to ensure the smooth construction of the project and the comprehensive completion of various indicators. It is a planned, step-by-step, and phased work, not only before construction, but also throughout the entire construction process.

　　Technical preparations

　　Be familiar with and review drawings. Drawings are the language of engineering and the basis for construction. Before starting work, construction personnel should first be familiar with the construction drawings; understand the design content and design drawings, clarify the equipment and materials used in the project, clarify the construction requirements proposed in the drawings, and the cross-cooperation between sub-projects, main projects, and other installation projects so as to ensure early completion of the project. Take measures to avoid location conflicts with other projects.

　　Review the drawing content and materials, and prepare construction auxiliary materials based on site conditions (photos, measurement data).

　　Review the main equipment and auxiliary materials; deepen the digestion and understanding of the drawings, and promptly provide reasonable suggestions to the designers if any discrepancies are found. If there is anything unclear, consult the design department in a timely manner so that there is no doubt in your mind. According to the project contract and design drawings, seize the time to organize personnel to make the following construction preparations:

　　1. In the early stage of entering the site, carry out in-depth design of construction drawings, such as the pre-embedding stage, early installation stage, etc., and solve the problems existing in the drawing design and on-site.

　　2. Draw the comprehensive layout of more complex points such as solar modules, bridges, junction boxes, inverters, etc. to avoid pipeline collisions and intersections during installation and construction, which will affect the construction quality and visual quality.

　　3. Be familiar with the site, plan the general layout of the construction, and prepare the construction organization design or construction plan. Submit it to the supervisor and Party A for review to ensure the feasibility of the plan.

　　4. Prepare material quantities and material plans based on the construction organization design and construction progress plan to ensure that the materials meet the construction progress requirements.

　　5. Be familiar with other technical information related to the project, such as construction and acceptance specifications, technical regulations, quality inspection and assessment information, such as installation instructions, product certificates, test record data, etc.

　　6. Prepare construction plan. On the basis of being fully familiar with the construction drawings, comprehensively make a reasonable construction plan based on the drawings and the construction site conditions, technical strength and technical equipment.

　　The overall construction process flow of solar array:

　　1. Cement pipe pile

　　2. Assembling square array brackets

　　3. Solar cell module installation

　　4. Install the fixings between solar modules

　　5. Overall adjustment to achieve horizontal and vertical alignment, even spacing, and overall beautiful appearance.

　　6. Installation of DC combiner box

　　7. DC combiner box or AC combiner box wiring

　　8. Cable fixation

　　4. Construction and installation process - piling and bracketing

　　1. Measurement - line drawing - positioning - pile pressing - re-measurement

　　2. Construction and installation process - bracket installation

　　3. Measurement - fixation - welding of the main bracket - re-inspection - the bracket hoop is fixed on the cement pile - upper horizontal single - upper inclined beam - angle meter detection - upper purlin - tie bars (lower The picture shows whether the supervision retest angle is 32 degrees)

　　4. Construction and installation process - solar module installation

　　Wiring - installation of solar modules - fixation between solar modules - overall adjustment to achieve horizontal and vertical alignment, even spacing, and overall beauty.

　　5. Installation and wiring of combiner box

　　DC combiner box (or string inverter box, AC combiner box)

　　Fix it on the cement pipe pile according to the size requirements of the drawing (tighten the bolts) - ground the box - series connection of the DC box group (the wire diameter and production meet the requirements of the specification) - seal the steel pipe diameter - fix the cable.

　　5. Hidden projects - excavation of ground trenches and cable trenches

　　Excavate 800mm wide × 700-1000mm deep according to the diagram - acceptance - welding of grounding bar (according to welding process) anti-corrosion of grounding bar - filling with soil (100mm) - placing cables - filling with soil (100mm) - placing 485 cables ——Acceptance before backfilling——Backfilling.

　　6. Other requirements: Bolts (key points)

　　1. The grade, specifications and quantity of bolts should be checked according to the design drawings and acceptance specifications, and used in a matching manner. Small ones should not be used instead of large ones.

　　2. Bolts should be classified in marked containers to prevent misuse due to mixed placement of bolts.

　　3. Keep records of bolts temporarily used for special reasons and replace them in time.

　　4. When tightening bolts, the maximum torque should not be greater than 120% of the minimum tightening torque.

　　5. Socket tools should be used to tighten bolts. The smoothness of the bottom of the nut should be checked and measures should be taken to prevent the screw from rotating.

　　6. One bolt should have two flats and one spring; after tightening the screw, three to five teeth should be exposed.

　　7. Strict responsibility system should be followed when tightening bolts, and a quality tracking system should be implemented.

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