CN-122013989-A - Distributed photovoltaic construction method based on steel structure building roof

Abstract

The invention relates to the technical field of building construction, in particular to a distributed photovoltaic construction method based on a steel structure building roof, which comprises the following steps of step one, roof investigation and pretreatment; measuring paying-off and positioning, prefabricating a hoop component, constructing a limit groove, installing the hoop component, installing a supporting sandal wood strip, installing a photovoltaic component, electrically connecting wires and lightning protection grounding, and debugging and detecting a system. According to the invention, the limiting groove matched with the plane size of the anchor ear component is formed on the fireproof coating layer on the surface of the I-steel, the inner wall of the limiting groove is utilized to form circumferential limiting on the anchor ear component, so that the sliding trend of the anchor ear component along the length direction of the I-steel is effectively limited, the transverse shearing resistance and the torsional resistance of the anchor ear and the I-steel connection are remarkably improved, and the overall stability of the photovoltaic bracket is enhanced.

Inventors

• XIANG YANWU
• CHEN XUEDONG
• YANG LIPING
• REN XIONGFEI
• ZHAO JIANXUE
• YANG CHUANG
• LI CHEN
• ZHU YUNJIE
• CHENG FEI
• TAO QIU
• PENG RONGHUI
• LI JUNLONG
• LI MAOJIANG
• YUAN JIE
• LIU DETIAN
• Gui Xiaoqing
• WU ZHEN

Assignees

• 中国建筑一局(集团)有限公司

Dates

Publication Date

20260512

Application Date

20260318

Claims (8)

1. 1. The distributed photovoltaic construction method based on the steel structure building roof is characterized by comprising the following steps of: firstly, performing comprehensive inspection on a steel structure roof, confirming that the roof is free from damage and water leakage, cleaning sundries, collecting structural parameters of the roof by using a digital tool, building a three-dimensional model of the roof, and performing photovoltaic module arrangement planning according to a design drawing and the three-dimensional model to determine the installation position and the distance of a photovoltaic bracket; step two, measuring paying-off and positioning, namely paying-off on roof I-steel by using a measuring instrument according to a photovoltaic module arrangement design drawing, and determining the mounting point coordinates of the photovoltaic bracket; prefabricating a hoop assembly, namely prefabricating the hoop assembly matched with the I-steel according to the specification and the model of the I-steel, wherein the hoop assembly comprises a left half hoop and a right half hoop, fixing wing plates are arranged on bottom plate means of the left half hoop and the right half hoop, fastening bolts are arranged on the fixing wing plates, and the left half hoop and the right half hoop can be combined into an integral structure by utilizing the fastening bolts; step four, constructing a limit groove, namely arranging the limit groove on a fireproof coating layer at a preset mounting position on the surface of the I-steel, wherein the groove depth of the limit groove is the same as the thickness of the fireproof coating layer, and the plane size of the limit groove is matched with the plane size of the anchor ear assembly; Step five, mounting the anchor ear assembly, namely embedding the anchor ear assembly into the limit groove, and forming circumferential limit on the anchor ear assembly by utilizing the inner wall of the limit groove; Step six, mounting support rods vertically on the top of the anchor ear assembly, and connecting the support rods with the support rods to form a frame structure for supporting the photovoltaic assembly; Step seven, installing the photovoltaic module, namely paving the photovoltaic module on a frame structure formed by supporting sandal strips, and fixing the photovoltaic module on the supporting sandal strips through pressing blocks and bolts; step eight, electric connection and lightning protection grounding, namely, completing serial connection between the photovoltaic modules, and connecting the support sandal strips with a roof lightning protection system to form equipotential connection; and step nine, system debugging and detection, namely carrying out photovoltaic system debugging and electrical parameter detection.
2. 2. The distributed photovoltaic construction method based on the steel structure building roof according to claim 1, wherein the top plates of the left half hoop and the right half hoop are oppositely provided with abutting plates, the abutting plates are inserted into the inner cavity of the support rod piece, and the spacing distance between the left half hoop and the right half hoop is adjusted through the fastening bolts, so that the abutting plates can be attached to the inner wall of the support rod piece.
3. 3. The distributed photovoltaic construction method based on the steel structure building roof according to claim 2, wherein the left half hoop and the right half hoop are further provided with first abutting bolts on the side faces, the first abutting bolts are obliquely arranged and are used for abutting against the bottom face of the I-steel upper wing plate, and the top portions of the left half hoop and the right half hoop are further provided with second abutting bolts which are used for abutting against the top face of the I-steel upper wing plate.
4. 4. The method of claim 3, wherein the anchor ear assembly is configured to form a gap between the top and bottom plates of the anchor ear assembly and the plane of the flange of the i-beam after the i-beam is connected.
5. 5. The distributed photovoltaic construction method based on the steel structure building roof according to claim 4, wherein the side plates of the anchor ear assembly are attached to the side edges of the lower flange plates of the I-steel after the connection of the I-steel is completed.
6. 6. The distributed photovoltaic construction method based on the steel structure building roof according to claim 5, wherein elastic rubber cushion layers are arranged at contact positions of the left half anchor ear and the right half anchor ear and side edges of the lower flange plates of the I-steel.
7. 7. The distributed photovoltaic construction method based on the steel structure building roof according to claim 6, wherein the support rod piece and the hoop assembly are connected in a welding mode.
8. 8. The distributed photovoltaic construction method based on the steel structure building roof according to claim 7, wherein a reinforcing rib plate is arranged at the connection part of the support rod piece and the anchor ear assembly, and the reinforcing rib plate is welded and fixed with the outer wall of the support rod piece and the top plate of the anchor ear assembly respectively.

Description

Distributed photovoltaic construction method based on steel structure building roof Technical Field The invention relates to the technical field of building construction, in particular to a distributed photovoltaic construction method based on a steel structure building roof. Background Building Integrated Photovoltaic (BIPV) and distributed photovoltaic power generation systems are increasingly being used in new and existing buildings. The steel structure roof has the advantages of light structure, high bearing capacity, short construction period and the like, and becomes an important carrier for installing a distributed photovoltaic system. Currently, for steel structure roofs using i-steel as a main bearing member, a hoop connection mode is generally adopted for installation of a photovoltaic bracket. According to the mode, the left half hoop and the right half hoop are oppositely covered on the outer side of the flange of the I-steel, the fastening bolt is used for applying pretightening force, the inner wall of the hoop is tightly attached to the surface of the I-steel, the dead weight and external load of the photovoltaic module are borne by virtue of friction force generated by the contact surface, and compared with the traditional welding connection, the safety risk of field high-altitude welding operation is avoided in the hoop connection, the damage of a welding heat affected zone to the anticorrosive layer on the surface of the steel is eliminated, and the welding heat affected zone has certain detachability, so that the post maintenance and the system transformation are facilitated. However, in practical engineering application, the anchor ear can only form effective contact with the flange of the I-steel, and a larger gap exists between the anchor ear and the web plate of the I-steel, so that the anchor ear is easy to slide along the length direction of the I-steel when bearing the action of transverse shearing force or torque, and the overall stability of the photovoltaic bracket is affected. Therefore, how to prevent the anchor ear from sliding along the length direction of the I-steel and improve the connection stability of the anchor ear and the I-steel is a technical problem to be solved in the prior art. Disclosure of Invention The invention aims to provide a distributed photovoltaic construction method based on a steel structure building roof, aiming at the problem that the hoop in the prior art can only form effective contact with the flange of the I-steel, and a larger gap exists between the hoop and the web of the I-steel, so that the hoop is easy to slide along the length direction of the I-steel when bearing transverse shearing force or torque action, and the integral stability of a photovoltaic bracket is affected. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a distributed photovoltaic construction method based on a steel structure building roof comprises the following steps: firstly, performing comprehensive inspection on a steel structure roof, confirming that the roof is free from damage and water leakage, cleaning sundries, collecting structural parameters of the roof by using a digital tool, building a three-dimensional model of the roof, and performing photovoltaic module arrangement planning according to a design drawing and the three-dimensional model to determine the installation position and the distance of a photovoltaic bracket; step two, measuring paying-off and positioning, namely paying-off on roof I-steel by using a measuring instrument according to a photovoltaic module arrangement design drawing, and determining the mounting point coordinates of the photovoltaic bracket; prefabricating a hoop assembly, namely prefabricating the hoop assembly matched with the I-steel according to the specification and the model of the I-steel, wherein the hoop assembly comprises a left half hoop and a right half hoop, fixing wing plates are arranged on bottom plate means of the left half hoop and the right half hoop, fastening bolts are arranged on the fixing wing plates, and the left half hoop and the right half hoop can be combined into an integral structure by utilizing the fastening bolts; step four, constructing a limit groove, namely arranging the limit groove on a fireproof coating layer at a preset mounting position on the surface of the I-steel, wherein the groove depth of the limit groove is the same as the thickness of the fireproof coating layer, and the plane size of the limit groove is matched with the plane size of the anchor ear assembly; Step five, mounting the anchor ear assembly, namely embedding the anchor ear assembly into the limit groove, and forming circumferential limit on the anchor ear assembly by utilizing the inner wall of the limit groove; Step six, mounting support rods vertically on the top of the anchor ear assembly, and connecting the support rods with the support rods to form a frame structure