Reinforcing construction method for additionally arranging purlines in photovoltaic system on roof

Abstract

The invention relates to a construction method for reinforcing purlines in a photovoltaic system additionally arranged on a roof, which belongs to the technical field of roof steel structures and comprises the following operation steps of: 1, laying purlines at the upper and lower ends of a roof panel for fixing; and secondly, the drainage grooves are laid on the reinforcing purlines in the mode of being perpendicular to the reinforcing purlines and fixed through self-tapping screws. And thirdly, the middle bearing plate is fixed to the upper portion of the drainage groove through self-tapping screws. And 4, paving a water guide groove between two adjacent photovoltaic panels, and fixing the water guide groove and the middle bearing plate by using bolts. An original structure is transformed into a structural system similar to a pipe truss through a method of additionally arranging the purline on the upper portion of an original roof panel, the strength, rigidity and stability of the original purline are improved, the use functions of waterproofing, heat preservation and the like of the original roof panel are achieved, production and processing operation in an original building is not affected, the reinforcing technical difficulty is lowered, and the manufacturing cost is saved. The heat preservation and waterproof capacity of the roof is enhanced, and the photovoltaic power generation function is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of roof steel structures, and in particular to a purlin reinforcement construction method for a rooftop photovoltaic system. Background Art

[0002] With the rapid development of China's photovoltaic industry, more and more industrial enterprises are installing photovoltaic power generation systems on existing metal roofs. However, the increased external loads brought about by photovoltaic retrofit projects will pose certain challenges to the safety of existing structures. In particular, the lightweight steel structures widely used in existing industrial buildings are prone to buckling and failure of roof purlins under the influence of the added photovoltaic loads. Therefore, efficient reinforcement and methods are needed to reduce the probability of structural damage and prevent accidents.

[0003] In related projects, purlin reinforcement is typically achieved through methods such as increasing cross-section (replacement) and lap reinforcement. However, for double-layer metal roof panels, removing one layer to reinforce the purlins can not only compromise the original roof's insulation and waterproofing properties, but also requires complex construction techniques and high labor costs. Summary of the Invention

[0004] The present invention primarily addresses deficiencies in the prior art by providing a method for reinforcing purlins in rooftop photovoltaic systems. By adding purlins above the existing roof panels, the existing structure is transformed into a system similar to a pipe truss, improving the strength, rigidity, and stability of the existing purlins. This method not only meets the existing roof's waterproofing and thermal insulation functions, but also does not affect the production and processing operations within the original building, reduces the technical difficulty of reinforcement, and saves construction costs. This method not only enhances the roof's thermal insulation and waterproofing capabilities, but also enables photovoltaic power generation.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions: A purlin reinforcement structure for a rooftop photovoltaic system includes a roof reinforcement assembly, on which a plurality of photovoltaic panels are provided. Drainage grooves are provided between two photovoltaic panels and between the roof reinforcement assembly, and fastening connection assemblies are provided between the upper ends of the drainage grooves and the photovoltaic panels on both sides.

[0006] The roof reinforcement assembly comprises a roof panel, and purlins are arranged at the upper and lower ends of the roof panel.

[0007] The fastening connection assembly includes a middle supporting plate located between the water trough and the photovoltaic panel, and a plurality of water guide grooves are provided between two adjacent photovoltaic panels. The water guide grooves are provided with bolts that are threadedly connected and fixed to the middle supporting plate.

[0008] The purlin reinforcement construction method for adding a photovoltaic system on the roof includes the following steps: Step 1: Lay purlins on the upper and lower ends of the roof panel for fixing.

[0009] Step 2: Lay the drainage trough perpendicular to the reinforced purlin and fix it with self-tapping screws.

[0010] Step 3: Fix the middle support plate to the upper part of the drainage trough with self-tapping screws.

[0011] Step 4: Then lay the water guide trough between two adjacent photovoltaic panels, and fix the water guide trough and the middle support plate with bolts.

[0012] Preferably, the upper end of the roof panel is provided with a roof crest flange which is integrated with the roof panel and distributed at equal intervals, and the purlin is provided with self-tapping screws which penetrate the roof crest flange and the roof panel.

[0013] Preferably, the purlins are cold-bent C-shaped reinforcement purlins, and the roof panels are connected and fixed to the purlins by self-tapping screws.

[0014] Preferably, a plurality of friction-increasing grooves are provided between the two sides of the water guide groove and the upper end of the photovoltaic panel, and between the two sides of the middle supporting plate and the lower end of the photovoltaic panel, which are integrated with the water guide groove and the middle supporting plate respectively.

[0015] Preferably, a pressure block is provided at the upper end of the water guide groove and is connected to the water guide groove in an embedded manner.

[0016] Preferably, the drainage trough is an M-shaped trough structure.

[0017] The present invention can achieve the following effects: The present invention provides a construction method for reinforcing purlins in a rooftop photovoltaic system. Compared with existing technologies, the addition of purlins cleverly forms a new spatial force system with the original structure, optimizing the force transmission path and increasing the bearing capacity of the original building roof. It also eliminates the adverse effects of on-site panel removal, drilling, and welding on the original structure, effectively avoiding the problem of potential safety hazards. It also ensures that industrial production can proceed normally and safely throughout the entire construction process, achieving zero impact of photovoltaic transformation on industrial production in the workshop, reducing the difficulty of reinforcement technology, and significantly reducing construction costs. This method improves construction efficiency, saves overall investment in photovoltaic projects, and has significant economic and social benefits in promoting the overall progress of photovoltaic power generation project construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the roof reinforcement assembly of the present invention.

[0020] Figure 3 It is a structural cross-sectional view of the roof reinforcement assembly of the present invention.

[0021] Figure 4It is a schematic diagram of the connection structure between the photovoltaic panel and the water tank of the present invention.

[0022] In the figure: roof reinforcement component 1, drainage trough 2, photovoltaic panel 3, fastening connection component 4, purlin 5, roof panel 6, roof crest flange 7, self-tapping screws 8, pressure block 9, water guide trough 10, bolt 11, middle support plate 12, friction increasing groove 13. DETAILED DESCRIPTION

[0023] The technical solution of the invention is further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0024] Example: Figure 1-4 As shown, a purlin reinforcement structure for a rooftop photovoltaic system includes a roof reinforcement assembly 1, which includes a roof panel 6. Purlins 5 are provided at the upper and lower ends of the roof panel 6. The upper end of the roof panel 6 is provided with a roof crest flange 7 that is integrated with the roof panel 6 and distributed at equal intervals. The purlin 5 is provided with self-tapping screws 8 that penetrate the roof crest flange 7 and the roof panel 6. The purlin 5 adopts a cold-bent C-shaped reinforcement purlin, and the roof panel 6 is connected and fixed to the purlin 5 by self-tapping screws 8. Several photovoltaic panels 3 are provided on the roof reinforcement assembly 1. A drainage gutter 2 is provided between the two photovoltaic panels 3 and the roof reinforcement assembly 1. The drainage gutter 2 is an M-shaped gutter structure. A fastening connection assembly 4 is provided between the upper end of the drainage gutter 2 and the photovoltaic panels 3 on both sides. The fastening assembly 4 includes a center support plate 12 positioned between the water trough 2 and the photovoltaic panels 3. Several water channels 10 are positioned between two adjacent photovoltaic panels 3. Pressure blocks 9 are positioned at the top of each water channel 10, snapping into place with the channels. Each water channel 10 is provided with bolts 11 threadedly secured to the center support plate 12. Several friction-enhancing grooves 13, integrated with the water channels 10 and the center support plate 12, are positioned between the water channels 10 and the top of the photovoltaic panels 3, and between the center support plate 12 and the bottom of the photovoltaic panels 3.

[0025] When reinforcing the purlins for a photovoltaic system on a roof, ensuring the stability and safety of the structure is crucial. The construction steps are detailed below: Step 1: Lay purlin 5 and fix it (1) Material selection: Cold-bent C-type reinforcement purlins are used, which have high strength and bending resistance and are suitable for the reinforcement requirements of photovoltaic systems for roof structures.

[0026] (2) Construction operation: Lay purlins 5 at the upper and lower ends of the roof panel 6.

[0027] The roof panel 6 and the purlin 5 are firmly connected using self-tapping screws 8 to ensure that the purlin and the roof panel form an integral structure and improve the overall stability.

[0028] Pay attention to the spacing and arrangement of the self-tapping screws to ensure uniform force.

[0029] Step 2: Lay the drainage trough 2 and fix it (1) Material selection: The drainage trough 2 adopts an M-shaped trough structure, which can effectively guide the discharge of rainwater and avoid water accumulation under the photovoltaic panels.

[0030] (2) Construction operation: Lay the drainage trough 2 perpendicular to the reinforced purlin 5.

[0031] Use self-tapping screws to fix the gutter 2 to the purlin to ensure it is stable and not easy to fall off.

[0032] Step 3: Install the middle plate 12 (1) Material selection: The middle support plate 12 is used to connect the drainage trough 2 and the photovoltaic panel 3 and must have sufficient strength and corrosion resistance.

[0033] (2) Construction operation: Use self-tapping screws to fix the middle support plate 12 to the upper part of the drainage trough 2.

[0034] Pay attention to the connection position and fixing strength between the middle support plate and the drainage trough 2 to ensure that the photovoltaic panels are evenly stressed during installation.

[0035] Step 4: Lay out the photovoltaic panels 3 and the water channel 10 and fix them (1) Material selection: The water channel 10 is used to guide water between the photovoltaic panels 3 and must have good waterproof and anti-deformation properties.

[0036] (2) Construction operation: Lay the water channel 10 between two adjacent photovoltaic panels 3.

[0037] The photovoltaic panel 3 needs to be firmly fixed on the middle support plate 12 and the water channel 10 to avoid loosening due to wind load or snow accumulation. The water channel 10 and the middle support plate 12 are fixed using bolts 11.

[0038] Ensure that the bolts are tightly connected to avoid looseness affecting the stability of the overall structure.

[0039] Connection between the gutter 2 and the water channel 10: Ensure that the connection between the gutter 2 and the water channel 10 is well sealed to prevent rainwater leakage. Waterproof tape or sealant can be used to strengthen the waterproof performance of the connection.

[0040] Step 5: Install the pressure block 9 (1) Material selection: The pressing block 9 must have sufficient strength to be firmly embedded in the water channel 10.

[0041] (2) Construction operation: buckle the pressing block 9 into the water channel 10, and ensure that it is tightly embedded in the water channel.

[0042] Check the connection between the pressure block, the water channel and the photovoltaic panel to ensure there is no gap.

[0043] The spacing between the self-tapping screws 8 and the bolts 11 must be uniform to avoid structural damage due to excessive local force.

[0044] The detailed description of the construction steps and key points above ensures that the purlin reinforcement structure for adding a rooftop photovoltaic system is both safe and efficient. It is recommended that the design and construction details be further optimized during construction, taking into account the specific project environment and technical specifications, to enhance the reliability and service life of the photovoltaic system.

[0045] In summary, this purlin reinforcement construction method for rooftop photovoltaic systems creates a new spatial force system by adding additional purlins to the existing structural purlins, optimizing the force transmission path and increasing the bearing capacity of the existing building roof. This method requires no demolition work, reduces structural disturbance, and the construction process has zero disruption to industrial production, avoiding downtime and losses, significantly saving costs.

[0046] The design incorporates a roof drainage connection device, primarily made of aluminum alloy. The connection device is secured to the gutter, allowing the photovoltaic modules to be snapped into place. This solves the problem of photovoltaic modules being waterproof, significantly increases roof space utilization, and achieves the goal of building photovoltaic integration.

[0047] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A method for reinforcing purlins in a rooftop photovoltaic system, characterized by: The purlin reinforcement structure in the rooftop photovoltaic system includes a roof reinforcement assembly (1), a plurality of photovoltaic panels (3) are provided on the roof reinforcement assembly (1), a drainage groove (2) is provided between two photovoltaic panels (3) and between the roof reinforcement assembly (1), and a fastening connection assembly (4) is provided between the upper end of the drainage groove (2) and the photovoltaic panels (3) on both sides; The roof reinforcement assembly (1) comprises a roof panel (6), and the roof panel (6) is provided with purlins (5) at the upper and lower ends. The fastening connection assembly (4) includes a middle supporting plate (12) located between the water trough (2) and the photovoltaic panel (3), a plurality of water guide grooves (10) are provided between two adjacent photovoltaic panels (3), and the water guide grooves (10) are each provided with bolts (11) threadedly connected and fixed to the middle supporting plate (12); The purlin reinforcement construction method for adding a photovoltaic system on the roof includes the following steps: Step 1: Lay purlins (5) on the upper and lower ends of the roof panel (6) for fixing; Step 2: Lay the drainage trough (2) perpendicular to the reinforcement purlin (5) and fix it with self-tapping screws; Step 3: Fix the middle support plate (12) to the upper part of the drainage trough (2) using self-tapping screws; Step 4: The water guide trough (10) is then laid between two adjacent photovoltaic panels (3), and the water guide trough (10) and the middle support plate (12) are fixed with bolts (11).

2. The purlin reinforcement construction method for a rooftop photovoltaic system according to claim 1 is characterized in that: The upper end of the roof panel (6) is provided with a roof crest flange (7) which is integrated with the roof panel (6) and distributed at equal intervals, and the purlin (5) is provided with self-tapping screws (8) which pass through the roof crest flange (7) and the roof panel (6).

3. The purlin reinforcement construction method for a rooftop photovoltaic system according to claim 1 is characterized in that: The purlin (5) is a cold-bent C-shaped reinforcement purlin, and the roof panel (6) and the purlin (5) are connected and fixed by self-tapping screws (8).

4. The purlin reinforcement construction method for a rooftop photovoltaic system according to claim 1 is characterized in that: A plurality of friction-increasing grooves (13) are provided between the two sides of the water guide groove (10) and the upper end of the photovoltaic panel (3), and between the two sides of the middle support plate (12) and the lower end of the photovoltaic panel (3). The friction-increasing grooves (13) are integrated with the water guide groove (10) and the middle support plate (12).

5. The purlin reinforcement construction method for a rooftop photovoltaic system according to claim 1 is characterized in that: The upper end of the water guide groove (10) is provided with a pressing block (9) which is connected to the water guide groove (10) in an embedded manner.

6. The method for reinforcing purlins in a rooftop photovoltaic system according to claim 1, characterized in that: The drainage trough (2) is an M-shaped trough structure.

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