A roof panel and roof system
By using a roll-up connection design for the metal roof panels, the problems of waterproofing performance and the difficulty in bending the thickness of existing metal composite roof panels are solved, achieving efficient sealing and simplified installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU CANLON BUILDING MATERIALS
- Filing Date
- 2025-04-14
- Publication Date
- 2026-06-26
AI Technical Summary
The existing fixing methods for metal composite roof panels can easily lead to damage to waterproofing performance, are complicated to install and have high maintenance costs, and are difficult to bend due to their thickness, making overlapping operations difficult.
The roof panel design using metal sheets includes a main body, connecting parts, and overlapping parts. The overlapping parts are connected by first and second rolled edges that curl together. A waterproof layer covers the surface of the metal sheet, avoiding the need for fasteners to be drilled or clamped. The thin design of the overlapping parts makes it easy to bend.
It improves sealing and waterproofing performance, enhances wind resistance and joint rigidity, simplifies the installation process, reduces maintenance costs, and expands the application scope.
Smart Images
Figure CN224412974U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of construction, and in particular to a roof panel and roofing system. Background Technology
[0002] Metal composite roofing panels are a widely used material in the construction industry, primarily for roofing or wall coverings. Compared to traditional materials such as tiles or concrete, metal composite roofing panels are much lighter, reducing structural requirements. They also withstand harsh weather conditions such as strong winds, rain, and snow, and offer excellent fire resistance. Many metal composite roofing panels are recyclable, contributing to sustainable development. Therefore, metal composite roofing panels have a wide range of applications. However, in existing roofing systems, fixing metal composite roofing panels often requires mechanical interlocking or clamping. Mechanical interlocking requires drilling holes for fasteners, which not only damages the metal composite roofing panels and easily leads to leaks, but also results in numerous holes, making it very difficult to locate leaks and leading to extremely high maintenance costs. Clamping, on the other hand, is often expensive, involves complex installation processes, and carries the risk of clamp damage, resulting in high maintenance costs. Furthermore, some metal composite roofing panels are quite thick, making them difficult to bend during overlapping, and posing a significant challenge to the overlapping operation. Utility Model Content
[0003] This disclosure provides a roof panel assembly and a roof panel system thereof to solve or alleviate one or more technical problems in the prior art.
[0004] To address the aforementioned technical problems, this utility model provides a roof panel comprising a metal plate, the metal plate including a main body, a connecting portion, and an overlapping portion. The connecting portion is connected to both sides of the main body along a first direction and is symmetrically inclined relative to the main body. The overlapping portion is connected to the side of the connecting portion on both sides of the main body that is far apart from each other. The overlapping portion is used to connect two adjacent roof panels. The overlapping portion includes two first rolled edges and a second rolled edge. The first rolled edges are connected parallel to the two ends of the two connecting portions that are far apart from each other and have a first bending structure. The second rolled edge is connected to the end of one of the first rolled edges that is far away from the connecting portion and has a second bending structure. The second rolled edge can be bent at a first angle to cover the first rolled edge and drive the first rolled edge to bend at a second angle so that the two roof panels are connected to each other. The roof panel also includes a waterproof layer, which covers one surface of the metal plate along its thickness direction and continuously covers the main body and the connecting portion of the metal plate.
[0005] In one feasible implementation, the first angle is the same as the angle of the second bend, and the second angle is the same as the angle of the first bend structure.
[0006] In one feasible implementation, the first angle is 90° and the second angle is 90°.
[0007] In one feasible implementation, the waterproof layer is a thermoplastic polyolefin waterproof membrane or a polyvinyl chloride waterproof membrane.
[0008] In one feasible implementation, the thickness of the metal plate is 0.6mm-2.4mm.
[0009] In one feasible implementation, the thickness of the waterproof layer is 1.2mm-5mm.
[0010] In one feasible implementation, the roof panel further includes a corrosion-resistant layer disposed on the side of the metal panel away from the waterproof layer.
[0011] Accordingly, this application also provides a roofing system comprising at least two roof panels as described in any of the preceding claims, wherein adjacent roof panels are connected by a first rolled edge and a second rolled edge.
[0012] In one feasible implementation, the roofing system further includes a waterproof cover that covers the interconnected first rolled edge portion and the second rolled edge portion and is connected to the waterproof layer of two adjacent roof panels.
[0013] In one feasible implementation, the waterproof covering is a thermoplastic polyolefin waterproof membrane or a polyvinyl chloride waterproof membrane.
[0014] The present invention has the following beneficial effects:
[0015] The roof panel provided in this application embodiment allows adjacent roof panels to be connected by rolling a first rolled edge and a second rolled edge together. The second rolled edge is essentially an extension of the first rolled edge. The second rolled edge first bends to cover the first rolled edge, and then the first rolled edge bends to cover the edge of the second rolled edge as well. This ensures that the edges of both the first and second rolled edges are enclosed internally, greatly improving the sealing and waterproofing performance. Furthermore, no fasteners or drilling are required for connection, and no additional clamps are needed, thus preserving the waterproofing performance of the roof panel. The assembled roof panels exhibit good tightness, improving their wind uplift resistance and enhancing the overlap rigidity and waterproofing functionality. Additionally, the waterproofing layer of the roof panel provided in this application only covers the main body and connecting parts, resulting in a relatively thin overlap. This facilitates rolling and bending operations during overlapping, and ensures that the overall thickness of the waterproofing layer and the main body of the roof panel is not limited by the rolling and bending operations during overlapping, thus expanding its application scope.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.
[0018] Figure 1 This is an exemplary structural cross-sectional schematic diagram of a roof panel provided in some embodiments of this application;
[0019] Figure 2 yes Figure 1 A magnified view of part A in the image;
[0020] Figure 3 This is a schematic diagram illustrating the process of connecting and fixing two adjacent roof panels to each other, provided in some embodiments of this application;
[0021] Figure 4 yes Figure 3 An enlarged schematic diagram of 3a in the diagram;
[0022] Figure 5 This is a schematic diagram of the roof panel connection portion of a roofing system provided in some embodiments of this application;
[0023] Figure 6 yes Figure 5 A magnified view of part B in the image;
[0024] Figure 7 This is an exemplary structural diagram of a roofing system shown in some embodiments of this application.
[0025] The reference numeral in the diagram: 100 - roof panel;
[0026] 110 - Main body;
[0027] 120 - Connecting part; 121 - Third bending structure;
[0028] 130 - First rolled edge; 131 - First bending structure; 1311 - First side; 1312 - Second side;
[0029] 140 - Second rolled edge; 141 - Second bending structure; 1411 - Third edge; 1412 - Fourth edge;
[0030] 101 - Waterproof layer, 102 - Metal plate, 103 - Anti-corrosion layer;
[0031] 200 - Roofing system; 210 - Roofing panel; 220 - Support structure; 221 - Purlin; 222 - Support plate; 230 - Insulation layer; 240 - Waterproof cover; 250 - Connection point. Detailed Implementation
[0032] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0036] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0037] Please refer to Figures 1 to 7 This application provides a roof panel and a roofing system. The roof panel 100 includes a metal plate. The metal plate includes a main body 110, a connecting part 120, and an overlapping part. The connecting portion 120 is connected to both sides of the main body portion 110 along the first direction and is symmetrically inclined relative to the main body portion 110. The overlapping portion is connected to the side of the connecting portion 120 on both sides of the main body portion 110 that is far away from each other. The overlapping portion is used to connect two adjacent roof panels 100. The overlapping portion includes two first rolled edge portions 130 and a second rolled edge portion 140. The first rolled edge portion 130 is connected in parallel to the two ends of the two connecting portions 120 that are far away from each other and has a first bending structure 131. The second rolled edge portion 140 is connected to one end of the first rolled edge portion 130 that is far away from the connecting portion 120 and has a second bending structure 141. The second rolled edge portion 140 can be bent at a first angle to cover the first rolled edge portion 130 and drive the first rolled edge portion 130 to bend at a second angle so that the two roof panels 100 are connected to each other. The roof panel 100 also includes a waterproof layer 101, which covers one surface of the metal panel along its thickness direction and continuously covers the main body 110 and the connecting part 120 of the metal panel.
[0038] The roof panel 100 provided in this embodiment can be connected to adjacent roof panels 100 by curling together a first rolled edge portion 130 and a second rolled edge portion 140. The second rolled edge portion 140 is essentially an extension of the first rolled edge portion 130. The second rolled edge portion 140 first bends to cover the first rolled edge portion 130, and then causes the first rolled edge portion 130 to bend and cover the edge of the second rolled edge portion 140 as well, so that the edges of the first rolled edge portion 130 and the second rolled edge portion 140 are both covered inside, and the sealing and waterproofing performance is greatly improved. Furthermore, no fasteners or drilling are required for connection, nor are additional clamps needed for holding the panels, thus preserving the waterproof performance of the roof panel 100. The assembled roof panel 100 exhibits good tightness, improving its wind uplift resistance and enhancing its overlap rigidity and waterproof functionality. Additionally, the waterproof layer 101 of the roof panel 100 provided in this application only covers the main body 110 and the connecting portion 120, resulting in a relatively thin overlap. This facilitates bending and rolling operations during the overlap process, ensuring that the overall thickness of the waterproof layer 101 and the main body 110 is not limited by these operations, thus expanding its application scope. If the waterproof layer 101 completely covered the metal plate, the overlap thickness would increase, making assembly, bending, and rolling more difficult and limiting the overall thickness of the roof panel 100.
[0039] In one feasible implementation, please refer to Figures 3 to 4 The first angle is the same as the second bending angle, and the second angle is the same as the angle of the first bending structure 131. Specifically, let the two sides of the first bending structure 131 be the first side 1311 and the second side 1312, and let the bending angle between the first side 1311 and the second side 1312 be α. Let the two sides of the second bending structure 141 be the third side 1411 and the fourth side 1412, and let the bending angle between the third side 1411 and the fourth side 1412 be β. Since the second rolled edge portion 140 is a bending structure extending from the first rolled edge portion 130, that is, the second side 1312 and the third side 1411 are on the same straight line (e.g., ...). Figure 3 (3a) Therefore, when the first angle is also α, that is, when the fourth side 1412 of the bent structure is bent by α, the fourth side 1412 is exactly in contact with the second side 1312 or parallel to the second side 1312. That is to say, the second side 1312 of the first rolled edge 130 is already surrounded by the third side 1411 and the fourth side 1412 of the second rolled edge 140 (as shown in 3a). Figure 3(3b) When the second angle is β, the second rolled edge 140 continues to bend along with the second edge 1312 of the first rolled edge 130 until the fourth edge 1412 of the second rolled edge 140 fits against the first edge 1311 of the first rolled edge 130. Alternatively, it can be said that the first edge 1311, the second edge 1312, the third edge 1411, and the fourth edge 1412 are parallel to each other. Thus, the fourth edge 1412 of the second rolled edge 140 is again surrounded by the first edge 1311 and the second edge 1312 of the first rolled edge 130. The first rolled edge 130 and the second rolled edge 140 are enclosed by a line, tightly connected (as shown in Figure 3b). Figure 3 (3c in the text). This angle setting allows the two roof panels 100 to be better assembled during connection and assembly, resulting in good sealing after connection, stable and firm connection, improved wind uplift resistance of the roof panels 100, and enhanced overlap rigidity and waterproof functionality of the roof panels 100.
[0040] In one feasible implementation, the first angle is 90° and the second angle is 90°. This angle setting, with its right-angle bends, significantly enhances the rigidity and load-bearing capacity of the material. During manufacturing, 90-degree bends are generally easier and less costly to implement than other angles; when multiple components need to be assembled together, 90-degree bends help simplify the assembly process; the standard angle allows for tighter fit between parts, reducing the need for additional adjustments. The right-angle design also facilitates the stacking of multiple roof panels 100; right-angle connection points provide better support and stability, thus ensuring good stacking stability during the stacking and transportation of the roof panels 100 after manufacturing, and preventing damage during handling.
[0041] In one feasible implementation, the first angle can also be other angles, and bending and wrapping can also be achieved, which will not be elaborated here.
[0042] In one feasible implementation, the portion of the connecting part 120 that connects to the main body 110 has an angle greater than 90° and less than 180°. This creates an outwardly flared opening structure between the connecting part 120 and the main body 110, resembling a trapezoidal or polygonal groove. This shape facilitates the rapid drainage of rainwater or other liquids, reducing water accumulation, helping to keep the roof dry, and extending its service life. In another feasible implementation, the main body 110 can have a continuous concave-convex structure. The concave-convex design increases the rigidity and bending resistance of the panel. By forming corrugations or ribs on the panel, external pressure can be effectively dispersed and absorbed, making the panel more robust and durable. The concave-convex shape facilitates the rapid drainage of rainwater or other liquids, reducing water accumulation. This design prevents leaks caused by moisture buildup and helps keep the roof dry, extending its service life. The concave-convex structure can provide an additional air layer to some extent, thereby improving thermal insulation. Air is a poor conductor of heat, so these gaps help reduce heat transfer and lower temperature fluctuations inside the building. Some textured designs also have aesthetic value, adding a unique appearance to buildings. Different textures and patterns can make a roof look more attractive. In certain situations, such as when people need to walk on the roof for maintenance, textured surfaces provide better grip, reducing the risk of slipping. Compared to completely flat panels, panels with textured structures can use less material to achieve the same strength requirements, thus reducing overall weight and facilitating transportation and installation. Textured designs can also help resist wind pressure, especially in high-wind-speed areas, where this design can better withstand the impact of wind on the roof. In this case, the angle of inclination of the connecting part 120 to the main body 110 can correspond to the textured structure of the main body 110. In this way, when multiple roof panels 100 are connected, the consistency and continuity of the roof's textured structure can be maintained, further improving the roof's wind uplift resistance and strengthening the overlap rigidity and waterproofing functionality of the roof panels 100.
[0043] In one feasible implementation, the connecting portion 120 has a third bend structure 121, the sum of the angle γ of the third bend structure 121 and the angle δ of the inclination is greater than 270°. That is, the connecting portion 120 also has an obtuse-angle bend, and while the connecting portion 120 and the main body 110 form an open groove structure, the edge of the groove also has a bend, denoted as γ. The bend γ makes the groove not a simple trapezoid, but a polygon, thus providing better structural stability. The polygonal cross-section of the roof panel 100 can better distribute the load, thereby improving the overall load-bearing capacity of the structure. The non-rectangular design helps to distribute the forces acting on the object more evenly, reducing stress concentration points, thereby extending service life and reducing the risk of damage.
[0044] In one feasible implementation, the roof panel 100 includes a waterproof layer 101 and a metal plate 102 sequentially along its thickness direction. The waterproof layer 101 is either a thermoplastic polyolefin (TPO) waterproof membrane or a polyvinyl chloride (PVC) waterproof membrane. TPO is an environmentally friendly material free of plasticizers, halogens, and other harmful substances. It meets green building standards, has strong weather resistance, excellent UV resistance, and can withstand long-term direct sunlight without aging, making it suitable for applications exposed to outdoor environments. It also has good flexibility, maintaining good flexibility and ductility even at low temperatures, facilitating adaptation to complex building structures during construction. Furthermore, it is resistant to chemical corrosion, exhibiting excellent resistance to various chemicals, making it suitable for industrial plants and other locations where chemical pollution risks may exist. White or light-colored TPO surfaces have high reflectivity, helping to reduce the internal temperature of buildings and decrease air conditioning energy consumption. PVC materials, on the other hand, can have their formulations adjusted to meet different needs, such as increasing flame retardancy or improving cold resistance. Seamless connections can be achieved through hot air welding technology, ensuring the overall continuity and sealing of the waterproof layer 101. Under normal circumstances, PVC waterproof membrane can provide protection for over 20 years, and even longer with proper maintenance. PVC material itself has high tensile and tear strength, capable of withstanding certain physical impacts without damage. If localized damage occurs, it can be quickly repaired with simple welding patches, without needing to replace the entire sheet. Compared to traditional waterproof materials, both TPO and PVC are relatively lightweight, helping to reduce the overall weight of the building. Both can be installed using various methods such as mechanical fastening and full adhesion, offering high adaptability.
[0045] In one feasible implementation, the thickness of the metal sheet is 0.6mm-2.4mm. Since the overlap consists only of metal sheets, the thickness of the sheet can be within the minimum range that ensures mechanical strength and rigidity, and the maximum range that allows for bending and curling of the overlap. A 0.6mm thick metal sheet provides good mechanical properties sufficient to meet the structural requirements of most construction and manufacturing applications. This thickness ensures that the sheet has sufficient rigidity and bending resistance while remaining relatively lightweight. Metal sheets within this thickness range are relatively easy to cut, bend, and stamp, making them suitable for manufacturing parts of various shapes and sizes. This is highly beneficial for improving production efficiency and reducing costs. Compared to thicker materials, 0.6mm to 2.4mm metal sheets are lighter, which helps to reduce the load on the overall structure and may reduce transportation costs. In addition, using an appropriate amount of material also helps to control costs and avoid waste. Appropriate thickness combined with suitable surface treatments (such as galvanizing, painting, etc.) can give the metal sheet good corrosion resistance and extend its service life. This is especially important for applications in outdoor or humid environments. Metal sheets within this thickness range can regulate heat transfer to a certain extent, avoiding both excessive thermal conductivity and excessive insulation. This makes them suitable for applications requiring some insulation without the desire for complete temperature control. Using metal sheets of appropriate thickness helps reduce resource consumption, aligning with sustainable development principles. Furthermore, many metal materials are recyclable, further reducing environmental impact. This thickness allows for better bending of the first roll edge 130 and the second roll edge 140. Excessive thickness makes bending difficult and assembly challenging. Metal sheets between 0.6mm and 2.4mm thick possess good mechanical strength and rigidity, capable of withstanding significant wind and snow loads, reducing the risk of deformation. Thicker sheets are less prone to vibration, contributing to improved overall building stability. Increased thickness means greater material durability, offering better resistance to daily wear and tear and harsh weather conditions such as strong winds and hail. Thicker sheets are also less susceptible to penetration or damage, extending their service life. For thicker layers, the thickness of the waterproof layer 101 can be increased accordingly. The waterproof layer 101 can also be hot-air welded after the edges are rolled, further enhancing its sealing and waterproofing performance. This makes joint treatment more reliable and reduces the risk of leakage caused by insufficient material thickness. During installation, thicker panels are easier to keep flat, and the increased thickness helps improve sound insulation, which is especially important for buildings requiring a good acoustic environment. It can effectively isolate external noise and improve indoor comfort. Although metal itself is non-combustible, appropriately thick panels can better resist high temperatures and slow the spread of fire. Although the initial investment may be higher, the overall maintenance cost is relatively low due to its long service life and low maintenance frequency. For large-span designs, this type of panel provides sufficient support and is suitable for a wide range of applications.
[0046] In one feasible implementation, the metal plate can be a steel plate, aluminum plate, aluminum-manganese plate, copper plate, iron plate, tin plate, or galvanized steel plate, aluminized zinc steel plate, etc. Depending on the application scenario or requirements, a metal plate with high weather resistance or corrosion resistance can be selected to improve the service life of the roof panel 100. Choosing a metal plate with a certain degree of flexibility allows the roof panel 100 to deform slightly according to the slope of the plane on which it is located during installation and fixing, which is beneficial for better fit and installation.
[0047] The thickness of the waterproof layer 101 is 1.2mm-5mm. Since the overlap is only the metal plate 102, the actual thickness of the waterproof layer 101 can be any value that ensures waterproof performance while considering economic needs. Alternatively, the thickness of the waterproof layer 101 can be greater than 1.2mm, any thickness that is technically feasible and will not cause problems with the load or rigidity of the roof panel 100. A waterproof layer thickness of 1.2mm to 5mm provides good waterproof performance, effectively preventing water penetration and protecting the structure and interior spaces from water damage. The appropriate thickness ensures that the waterproof material can form a continuous and complete barrier. Compared to a thinner waterproof layer 101, a thickness of 1.2mm to 5mm provides better aging resistance and durability. This means that the waterproof layer 101 can maintain its performance for a longer period when facing UV radiation, temperature changes, and other environmental factors. The appropriate thickness of the waterproof layer 101 provides better flexibility and ductility, resisting cracks caused by building structure movement or temperature changes to a certain extent. This helps reduce the risk of leakage. Within this thickness range, the waterproofing material is neither too thick to be difficult to apply, nor too thin to result in uneven coverage. This simplifies the application process and improves work efficiency while ensuring waterproofing effectiveness. Optionally or preferably, the thickness of the waterproofing layer 101 is 1.2mm-1.8mm. A 1.2mm to 1.8mm waterproofing layer 101 typically offers sufficient protection while also being a cost-effective choice. While an excessively thick waterproofing layer 101 may provide an extra safety margin, it also increases material costs and application difficulty; conversely, an excessively thin layer may result in poor waterproofing and, in the long run, increased maintenance costs. This thickness range is suitable for the preparation of waterproofing materials such as TPO or PVC. Many countries and regions have specific standards and regulations regarding the thickness of the waterproofing layer 101.
[0048] In one feasible implementation, the roof panel 100 further includes an anti-corrosion layer 103. The anti-corrosion layer 103 is disposed on the side of the metal panel 102 away from the waterproof layer 101. The anti-corrosion layer 103 effectively prevents moisture, oxygen, and various corrosive substances in the air from eroding the metal substrate, thereby significantly extending the service life of the roof panel 100. By adding a specially designed anti-corrosion coating, the metal roof panel 100 can better resist the effects of harsh environmental conditions such as ultraviolet radiation and acid rain, maintaining its appearance and performance for a long time. Good anti-corrosion treatment reduces the need for regular maintenance or replacement of the roof panel 100, lowering long-term maintenance costs. This makes the total cost of ownership of the entire building project more economical. Some anti-corrosion coatings also possess certain flame-retardant properties, which can improve the fire resistance rating of the roof panel 100 to a certain extent, providing additional safety for the building. Specific types of anti-corrosion coatings have been developed for different environmental conditions (such as high-salt-spray environments in coastal areas and highly polluted environments in industrial areas) to ensure good performance under various harsh conditions. Some anti-corrosion coatings can also enhance the impact resistance and abrasion resistance of the panels, further improving their physical properties.
[0049] In one feasible implementation, the anti-corrosion layer 103 is made of TPO film, and its thickness is ≥0.18mm. Since the overlap is only the metal plate 102, the thickness of the anti-corrosion layer 103 can be any value that ensures waterproof performance while considering economic needs. Alternatively, the thickness of the anti-corrosion layer 103 can be 0.18mm or more, any thickness that is technically feasible and will not cause problems with the load or rigidity of the roof panel 100. TPO material has excellent UV resistance and oxidation resistance, allowing it to be exposed to outdoor environments for extended periods without aging. This helps extend the overall service life of the roof panel 100. TPO film is a polymer material with excellent waterproof performance. A TPO film of 0.18mm or thicker can form a continuous, seamless protective layer, effectively preventing moisture penetration into the metal substrate, thereby reducing the risk of corrosion. TPO has good resistance to various chemicals, including acid and alkali solutions, making it suitable for industrial areas or other environments where chemical pollution may exist. TPO is an environmentally friendly material, free of plasticizers, halogens, and other harmful substances, meeting green building standards and contributing to environmental protection. TPO membranes with a thickness of 0.18mm or more possess good mechanical strength, are not easily torn or punctured, and provide better physical protection. TPO membranes can be seamlessly joined using hot air welding technology, ensuring the overall continuity and sealing of the waterproof layer 101 and reducing the possibility of leakage. TPO membranes are relatively lightweight and do not significantly increase the weight burden of the roofing system. At the same time, they maintain good flexibility and ductility even at low temperatures, facilitating adaptation to complex building structures during construction. If local damage occurs, it can be repaired through simple welding without replacing the entire material, reducing maintenance costs and difficulty. TPO materials typically have certain flame-retardant properties, which can improve the fire resistance rating of the roof panel 100 to a certain extent, enhancing the safety of the building.
[0050] Further, optionally or preferably, the thickness of the roof panel 100 is 1.8mm, 2.1mm, or 2.4mm; the thickness of the waterproof layer 101 of the roof panel 100 is 1.2mm, 1.5mm, or 1.8mm; the thickness of the anti-corrosion layer 103 is ≥0.18mm; and the thickness of the metal plate 102 is ≥0.6mm. Alternatively or preferably, the thickness of the roof panel 100 is 2.4mm; the thickness of the waterproof layer 101 of the roof panel 100 is 1.5mm; the thickness of the metal plate 102 is 0.6mm; and the thickness of the anti-corrosion layer 103 is 0.3mm. This thickness structure allows the aforementioned properties of the roof panel 100 to achieve an optimal combination.
[0051] Accordingly, please refer to Figures 5 to 7This application also provides a roofing system. The roofing system includes at least two roof panels as described in any of the preceding claims. Adjacent roof panels are connected by a first rolled edge and a second rolled edge. The roofing system provided by this application includes all the advantages of the roof panels, which will not be elaborated here.
[0052] In one feasible implementation, the partial structure of the roofing system is as follows: Figure 7 As shown, the roofing system 200 includes a roof panel layer composed of a support structure 220, an insulation layer 230, and multiple roof panels 210. The support structure 220 is located at the bottom of the roofing system and supports other roof structures above it. That is, the support structure 220 can support the insulation layer 230 and the roof panel 210 layers. The support structure 220 may include purlins 221 and support plates 222. The support plates 222 are placed above the purlins 221 and supported by them. The support plates 222 can be laid on the purlins 221 and fixed to them by steel wires or the like. The insulation layer is located above the support plates 222 and is supported and stabilized by them. The insulation layer 230 is located on top of the support structure. The insulation layer 230 is disposed on top of the support plates 222, and the material of the insulation layer 230 can be glass wool or insulating cotton. The roof panel 210 layer is located above the insulation layer 230 and is composed of multiple layers of roof panels 210. These multiple roof panels 210 overlap each other to form a single unit. Adjacent roof panels 210 partially overlap each other. "Adjacent" here includes both left-right and front-back adjacent panels. The overlapping portions of adjacent roof panels 210 are fixedly connected by bending and covering the first and second rolled edges of the roof panels 210 together. Simultaneously, each roof panel 210 constituting the roof panel 210 layer is fixed to a purlin by fasteners, and each fastener is covered with a waterproof membrane. The fasteners can be fasteners such as self-tapping screws. The waterproof membrane can be PVC membrane or TPO membrane.
[0053] In one feasible implementation, please refer to Figures 5 to 6 The roofing system also includes a waterproof cover 240, which covers the connection point 250 of the first and second rolled edges of two interconnected roof panels 100 and connects to the waterproof layer 101 of the adjacent two roof panels 100. By providing the waterproof cover, corrosion of the metal plates at the overlaps due to exposure can be prevented, and the risk of leakage at the connection points of the overlaps can also be avoided.
[0054] In one feasible implementation, the waterproof covering is a thermoplastic polyolefin (TPO) waterproof membrane or a polyvinyl chloride (PVC) waterproof membrane. Both TPO and PVC waterproof membranes offer all the advantages described above, and both are weldable. Thus, the waterproof covering can be fixed to the waterproof layer at the joint using hot air welding. This hot air welding forms a unified structure, completely covering the gap created by the curling between the two roof panels, providing both strength and reducing the risk of leakage.
[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0056] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A roofing panel characterized by, The roof panel includes a metal plate, which comprises a main body, a connecting part, and an overlapping part. The connecting part is connected to both sides of the main body along a first direction and is symmetrically inclined relative to the main body. The overlapping part is connected to the side of the connecting part on both sides of the main body that is far apart from each other. The overlapping part is used to connect two adjacent roof panels. The overlapping part includes two first rolled edges and a second rolled edge. The first rolled edges are connected parallel to the two ends of the two connecting parts that are far apart from each other and have a first bending structure. The second rolled edge is connected to one end of the first rolled edge that is far away from the connecting part and has a second bending structure. The second rolled edge can be bent at a first angle to cover the first rolled edge and drive the first rolled edge to bend at a second angle so that the two roof panels are connected to each other. The roof panel also includes a waterproof layer that covers one surface of the metal panel along its thickness direction and continuously covers the main body and connecting parts of the metal panel.
2. The roofing panel of claim 1, wherein The first angle is the same as the second bending angle, and the second angle is the same as the angle of the first bending structure.
3. The roofing panel of Claim 2, wherein, The first angle is 90°, and the second angle is 90°.
4. The roof panel according to claim 1, characterized in that, The waterproof layer is a thermoplastic polyolefin waterproof membrane or a polyvinyl chloride waterproof membrane.
5. The roof panel according to claim 4, characterized in that, The thickness of the metal plate is 0.6mm-2.4mm.
6. The roof panel according to claim 5, characterized in that, The thickness of the waterproof layer is 1.2mm-5mm.
7. The roof panel according to claim 6, characterized in that, The roof panel also includes an anti-corrosion layer, which is disposed on the side of the metal panel away from the waterproof layer.
8. A roofing system, characterized in that, It includes at least two roof panels as described in any one of claims 1 to 7, with adjacent roof panels connected by a first rolled edge and a second rolled edge.
9. The roofing system according to claim 8, characterized in that, It also includes a waterproof cover that covers the interconnected first rolled edge portion and the second rolled edge portion and is connected to the waterproof layer of two adjacent roof panels.
10. The roofing system according to claim 9, characterized in that, The waterproof covering is a thermoplastic polyolefin waterproof membrane or a polyvinyl chloride waterproof membrane.