Building photovoltaic integrated annular roof system

Abstract

The utility model discloses a building photovoltaic integrated annular roof system which comprises a round lighting skylight, an annular roof purline and building photovoltaic metal roof panels, the building photovoltaic metal roof panels comprise a plurality of first metal roof panels and a plurality of second metal roof panels which are arranged in a staggered mode, the first metal roof panels are equal-width roof panels, and the second metal roof panels are equal-width roof panels. A photovoltaic module is integrated on the second metal roofing board, and the second metal roofing board is a fan-shaped roofing board; an edge support is fixed on the annular roof purline, an occlusion piece is arranged on the edge support, and the edge support enables occlusion ribs I on the two sides of the first metal roof board, the occlusion piece and occlusion ribs II on the two sides of the second metal roof board to form occlusion type sealing connection in a holding and wrapping lock stitch mode. According to the utility model, the problems of complex installation operation, large construction difficulty, high cost and long construction period time consumption of an annular roof photovoltaic system under the existing system are solved, and the urgent demand of an annular metal roof on a building photovoltaic integrated system which is beautiful, energy-saving, environment-friendly and easy to operate and maintain is met.

Description

Technical Field

[0001] This utility model relates to the field of building photovoltaic technology, specifically to a building photovoltaic integrated ring roof system. Background Technology

[0002] With the deep integration of information technology and industrial development, the construction industry is undergoing an unprecedented transformation. Future buildings will no longer be simple living or working spaces, but will evolve into small ecosystems, achieving self-sufficient power supply, water recycling, and other efficient energy utilization and environmentally friendly functions.

[0003] Following the proposal of the "carbon peak and carbon neutrality" goals, a wave of green development has swept across all sectors of the country. In the construction industry, various green buildings and ultra-low energy consumption buildings have been considered the future direction of construction development in recent years. Among a series of green building concepts, building-integrated photovoltaics (BIPV) has become a popular concept spanning both the construction and new energy industries, gaining widespread attention and becoming a hot topic in both fields.

[0004] Distributed photovoltaic (PV) power generation, with its flexible and efficient power supply, is commonly found on idle rooftops of residential buildings, businesses, and industrial and commercial buildings, and has become an important force in my country's energy transition. In the early days, distributed PV power generation mainly adopted traditional BAPV (Building-on-Platform PV) technology, which involves "attaching" a solar PV system to a building. For example, a common method for installing PV on metal roofs involves adding special clamps and matching brackets to the metal roof panels before installing the PV modules. This method restricts the deformation of the metal roof panels due to thermal expansion and contraction, increasing the likelihood of tearing at the clamp points and leading to leaks. However, with the advent of BIPV (Building-in-Platform PV) technology, this situation has changed. Special clamps and brackets can be eliminated, and PV modules can be directly "integrated" onto the metal roof panels. BIPV technology, with its aesthetic, safety, and cost advantages, has successfully replaced BAPV and is gradually becoming the mainstream.

[0005] However, as people's demands for building functionality and aesthetics continue to increase, more and more large industrial and commercial buildings are being designed with ring-shaped roofs. When metal roof panels are used as the waterproof structural layer, these panels need to be irregularly shaped, i.e., "small-end" or "large-end" panels. The end of the panel near the center of the roof is the "small-end," and the end near the exterior wall is the "large-end." In the current photovoltaic module market, the mainstream photovoltaic modules are rectangular, which cannot match the irregularly shaped metal roof panels of ring-shaped roofs. Special clamps and special profile brackets are needed to install the photovoltaic modules, causing such ring-shaped roof buildings to be unable to keep up with the development of the building-integrated photovoltaics (BIPV) era. Utility Model Content

[0006] To address the aforementioned problems and shortcomings, this utility model provides a building-integrated photovoltaic (BIPV) ring roof system, which solves the problems of complex installation and operation, high construction difficulty, high cost, and long construction period of existing ring roof photovoltaic systems. It meets the urgent need of ring metal roofs for a beautiful, energy-saving, environmentally friendly, and easy-to-maintain BIPV system.

[0007] The present invention adopts the following technical solution:

[0008] A building-integrated photovoltaic (BIPV) ring roof system includes a circular skylight, ring roof purlins distributed around the circular skylight, and building-integrated photovoltaic metal roof panels fixedly connected to the ring roof purlins. The building-integrated photovoltaic metal roof panels include several first metal roof panels and several second metal roof panels, which are staggered. The first metal roof panels are equal-width roof panels arranged along the radial direction of the circular skylight and have photovoltaic modules integrated on them. The second metal roof panels are fan-shaped roof panels arranged along the radial direction of the circular skylight. Edge supports are fixed on the ring roof purlins, and the edge supports are provided with upwardly extending interlocking pieces. The edge supports form an interlocking seal connection between the interlocking ribs I on both sides of the first metal roof panels, the interlocking pieces, and the interlocking ribs II on both sides of the second metal roof panels by a gripping and locking method.

[0009] Furthermore, the annular roof purlin is also provided with a central support, which is fixed at the center of each of the first metal roof panels, and the central support is connected to the central wave rib on the first metal roof panel in a snap-fit ​​manner.

[0010] Preferably, an edge support surface is formed on the inner side of the interlocking ribs I on both sides of the first metal roof panel, and a middle support surface is formed on the top of the middle wave rib of the first metal roof panel. The middle support surface and the edge support surface are located on the same plane. Structural adhesive is applied to the edge support surface and the middle support surface respectively, and the lower end surface of the photovoltaic module is bonded and fixed to the structural adhesive.

[0011] Furthermore, the side supports are provided on both sides of the side support, and the side supports are in contact with the side support surface on the first metal roof panel.

[0012] Furthermore, a waterproof membrane, insulation cotton, and a roof base plate are sequentially arranged below the building photovoltaic metal roof panel. Butyl tape is provided between the edge support and the waterproof membrane, and between the middle support and the waterproof membrane. The edge support and the middle support are fixedly connected to the annular roof purlins by fastening connectors. The roof base plate is fixedly connected to the lower flange of the annular roof purlins by the fastening connectors.

[0013] Preferably, the photovoltaic module is a monocrystalline silicon frameless double-layer glass module.

[0014] This utility model has the following advantages compared to the prior art:

[0015] A. This utility model uses a first metal roof panel of equal width and a second metal roof panel with a fan-shaped surface for edge interlocking, and integrates photovoltaic modules on the first metal roof panel to form a ring-shaped building photovoltaic metal roof panel that can surround the top circular skylight. This makes efficient use of building space, enhances the aesthetic integration of building and photovoltaics, and makes the photovoltaic modules cleverly "integrated" into the building elements, becoming part of the building composition. This not only achieves efficient use of building space, but also endows the building with unique aesthetic value.

[0016] B. Compared with the traditional method of installing photovoltaic modules on a ring-shaped metal roof, which requires the use of special clamps and profiles, this utility model can directly eliminate the installation process of special clamps and profiles. The photovoltaic modules are directly "integrated" onto the first metal roof panel, saving construction costs, reducing the overall cost of the roof system, saving installation steps, and significantly improving installation efficiency.

[0017] C. This utility model targets a first metal roof panel of uniform width, using edge supports to fix the first metal roof panel to the annular roof purlin. For a second metal roof panel with an irregular shape, it only needs to combine its two side interlocking ribs II with the two side interlocking ribs I of the first metal roof panel, forming a gripping and locking seam with the interlocking pieces on the edge supports. At the same time, a central wave rib is set in the middle of the first metal roof panel, and a central support is set on the annular roof purlin that is snapped together with the central wave rib, which greatly improves the wind uplift resistance of the metal roof panel. Butyl tape is set between the edge supports and the central support and the waterproof membrane, which improves the waterproof capability of the entire roof system.

[0018] D. Compared with the construction of photovoltaic power stations with traditional ring-shaped metal roofs, the metal roof system and the photovoltaic system in this utility model can be designed and constructed simultaneously, so that the photovoltaic system and the metal roof system have the same lifespan. This avoids the difference in life cycle between the metal roof system and the photovoltaic system, which leads to the problem of frequent replacement or maintenance of the two systems, thereby bringing stable long-term economic returns and cost benefits to the owner. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model, the drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A cross-sectional schematic diagram of the building-integrated photovoltaic ring-shaped metal roofing system provided by this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the structure of the ring-shaped metal roofing system of this utility model;

[0022] Figure 3 This is a schematic diagram of the entire assembly of this utility model.

[0023] Figure 4 for Figure 1 Schematic diagram of the edge support structure in the middle;

[0024] Figure 5 This diagram illustrates the installation sequence for two types of metal roofing panels.

[0025] The diagram is labeled as follows:

[0026] 1- Circular skylight

[0027] 2- Circular roof purlins

[0028] 3-Building Photovoltaic Metal Roofing Panels

[0029] 31-First Metal Roofing Panel

[0030] 311-Two-sided interlocking ribs I, 3111-Side support surface

[0031] 312-medium wave rib, 3121-medium support surface

[0032] 32-Second metal roofing panel, 32a-Large end, 32b-Small end

[0033] 321-Bilateral Occlusal Rib II

[0034] 4-Photovoltaic Modules

[0035] 5-Edge Support

[0036] 51-Occlusal plate, 52-Side support

[0037] 6-Central support; 7-Structural adhesive; 8-Waterproof membrane; 9-Insulation cotton; 10-Roof base plate

[0038] 20-Butyl tape; 30-Fastening connector. Detailed Implementation

[0039] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] like Figures 1 to 5 As shown, this utility model provides a building-integrated photovoltaic (BIPV) ring roof system, including: a circular skylight 1, ring roof purlins 2 distributed around the circular skylight 1, and building-integrated photovoltaic metal roof panels 3 fixedly connected to the ring roof purlins 2. The building-integrated photovoltaic metal roof panels 3 include several first metal roof panels 31 and several second metal roof panels 32, which are staggered. The first metal roof panels 31 are equal-width roof panels arranged radially along the circular skylight 1, and photovoltaic modules 4 are integrated on them, making both the first metal roof panels 31 and the photovoltaic modules 4 regular shapes. The second metal roof panels 32 are fan-shaped roof panels arranged radially along the circular skylight 1, i.e., presenting a fan-shaped surface structure with one end being larger and the other end smaller. Figure 1 and Figure 4 As shown, an edge support 5 is fixed to the annular roof purlin 2, and an upwardly extending interlocking piece 51 is provided on the edge support 5. Figure 1As shown, the edge support 5 forms an interlocking seal connection between the two sides of the first metal roof panel 31 (interlocking ribs I311 and interlocking piece 51) and the two sides of the second metal roof panel 32 (interlocking ribs II321) by gripping and locking the seams.

[0043] To further enhance the wind uplift resistance of the metal roof panel, as a preferred embodiment of this utility model, a central support 6 is also provided on the annular roof purlin 2. The central support 6 is fixed in the middle position of the first metal roof panel 31. At the same time, a central wave rib 312 is also provided in the middle of the first metal roof panel 31. The central support 6 and the central wave rib 312 on the first metal roof panel 31 form a snap-fit ​​connection, thereby achieving simultaneous fixation of the edge and the middle of the first metal roof panel 31. The interlocking ribs II 321 on both sides of the second metal roof panel 32 only need to be gripped and locked with the interlocking ribs I 311 on both sides of the edge of the first metal roof panel 31, making the installation process simpler.

[0044] When supporting photovoltaic module 4, the support structure is as follows: Figure 5 As shown, a side support surface 3111 is formed on the inner side of the interlocking ribs I311 on both sides of the first metal roof panel 31, and a middle support surface 3121 is formed on the top of the middle wave rib 312 of the first metal roof panel 31. The middle support surface 3121 and the side support surface 3111 are located on the same plane. When installing the photovoltaic module 4, structural adhesive 7 needs to be applied to the side support surface 3111 and the middle support surface 3121 respectively. Then, the lower end face of the photovoltaic module 4 is bonded and fixed to the structural adhesive 7, thereby completing the integration between the photovoltaic module 4 and the first metal roof panel 31.

[0045] like Figure 4 As shown, the present invention further provides side supports 52 on both sides of the side support 5. The side supports 52 are in contact with the side support surface 3111 on the first metal roof panel 31. The side supports 52 can provide good support for the first metal roof panel 31 and the photovoltaic module 4.

[0046] Therefore, this utility model scientifically and effectively combines the first metal roof panel 31 for building photovoltaic integration with the irregularly shaped second metal roof panel 32, which can not only meet the requirements of the annular metal roof for the specific shape of the metal roof panel, but also meet the key conditions for the "integration" of photovoltaic modules 4 on the annular metal roof, ultimately achieving the green energy development goal of building photovoltaic integration.

[0047] Figure 2This is a three-dimensional schematic diagram of the construction of a ring-shaped metal roofing system. It is evident that the irregularly shaped second metal roofing panel 32 includes a large end 32a and a small end 32b. The first structural waterproofing layer of the building roof is laid through an installation sequence of first metal roofing panel 31 → second metal roofing panel 32 → first metal roofing panel 31 → second metal roofing panel 32, or an installation sequence of n first metal roofing panels 31 → m second metal roofing panels 32 → n first metal roofing panels 31 → m second metal roofing panels 32, where n and m represent the quantities. Furthermore, since the inner circumference of the ring-shaped roof is smaller than the outer circumference, the panel end near the center of the roof is the small end 32b, and the panel end near the outer wall is the large end 32a. The drainage direction of the roof is from the small end 32b to the large end 32a.

[0048] Figure 3 This is a schematic diagram of the entire structure after installation, including photovoltaic modules 4, a first metal roof panel 31, a second metal roof panel 32, and a circular skylight 1. The circular skylight 1 is distributed in the central area of ​​the entire building roof, serving both to provide lighting and ventilation for the building, and to overcome the limitation that metal roof panels cannot be installed in a closed manner infinitely close to the center area. Figure 3 The metal roofing panel installation method adopted is: first metal roofing panel 31 → second metal roofing panel 32 → first metal roofing panel 31 → second metal roofing panel 32, that is, one first metal roofing panel 31 and one second metal roofing panel 32 are laid alternately, and the number of first metal roofing panels 31 to second metal roofing panels 32 laid is approximately 1:1. Figure 4 This is a schematic diagram illustrating the installation sequence of the two types of metal roof panels provided by this utility model.

[0049] It should be noted that the effective width of the first metal roof panel 31 is a known condition. During the design phase, the widths of the large end 32a and the small end 32b of the irregularly shaped metal roof panel 32 of the second metal roof panel 32 need to be determined, and the following conditions must be met:

[0050] L1 = m × H + n × h1;

[0051] L2 = m × H + n × h2;

[0052] Where: L1 – outer ring circumference (m);

[0053] L2 – Inner ring circumference (m);

[0054] m – Number of the first metal roof panels (sheets);

[0055] n – Number of second metal roof panels (sheets);

[0056] H – Effective width of the first metal roof panel (m);

[0057] h1 – Effective width of the large end of the second metal roof panel (m);

[0058] h2 – Effective width of the small end of the second metal roof panel (m);

[0059] Further explanation is needed. The outer ring perimeter L1, the inner ring perimeter L2, and the effective width H of the first metal roof panel are known parameters. The number of first metal roof panels m, the number of second metal roof panels n, the effective width h1 of the large end of the second metal roof panel, and the effective width h2 of the small end of the second metal roof panel need to be obtained based on the known parameters. Furthermore, h1 should preferably be less than 460mm and h2 should preferably be greater than 215mm.

[0060] The effective widths h1 and h2 of the large end of the second metal roofing panel should be determined based on the width of the steel coil and the effective width h3 of a commonly used metal roofing panel that matches the interlocking ribs of the first metal roofing panel. To ensure the effective utilization of the steel coil, the following conditions should be met:

[0061] h1+h2≤2×h3

[0062] That is, the utilization rate of the steel coil is maximized when the sum of h1 and h2 equals twice h3.

[0063] In summary, the circular metal roof can fully adopt the green energy transformation solution of building-integrated photovoltaics (BIPV), which enables the circular roof system to be designed, procured, processed, installed, and maintained simultaneously in terms of building function and photovoltaic empowerment. This avoids the need for preparing and processing multiple materials, reduces various costs, and shortens the construction cycle of the entire project.

[0064] like Figure 2 As shown, a waterproof membrane 8, thermal insulation cotton 9, and a roof base plate 10 are sequentially installed below the building photovoltaic metal roof panel 3. After the annular roof purlin 2 is installed on the roof truss structure, the roof base plate 10 is connected and fixed to the lower flange of the annular roof purlin 2 through fastening connectors 30. The thermal insulation cotton 9 is continuously laid on the upper flange of the annular roof purlin 2 to ensure the basic functions of building insulation, heat insulation, and sound insulation. The waterproof membrane 8 is continuously laid on the thermal insulation cotton 9, and the various overlaps of the waterproof membrane 8 are effectively connected by hot air welding, forming the second structural waterproof layer of the building roof. When the edge supports and the middle supports are fixed, the fastening connectors will penetrate the waterproof membrane. In order to ensure the sealing of the waterproof membrane, a layer of butyl tape needs to be attached at the junction of the edge supports and the middle supports with the waterproof membrane. The fastening function of the fastening connectors will cause the butyl tape between the two supports and the waterproof membrane to be compressed with high strength, which is sufficient to ensure the waterproof effect of the second structural waterproof layer of the roof.

[0065] In the current specifications for waterproofing practices in metal roofing projects, the thickness of the waterproof membrane 8 and whether or not it is installed directly affect the waterproofing level of the building. The edge support 5 and the middle support 6 used in this utility model are special matching structural components for the installation of metal roof panels. The edge support 5 and the middle support 6 are laid out and positioned according to the wave pitch and waveform of the building photovoltaic metal roof panel 3, and then connected and fixed to the annular roof purlin 2 by fastening connector 30.

[0066] Thermal insulation cotton is a roll-shaped insulation material made to meet the needs of large-area laying. In addition to maintaining its unique heat insulation and heat insulation characteristics, it also has excellent fire resistance, shock absorption and sound absorption properties, which helps to reduce noise pollution and improve the working environment.

[0067] A ring-shaped roof purlin is a horizontal steel structural component perpendicular to the roof truss. It has cross-sectional shapes such as C-shape and Z-shape, and its main function is to support the roofing materials. The roofing materials include metal roof panels, waterproof membrane, insulation, and a roof base plate. The roof base plate is a profiled structure formed by cold-bending steel coils into specific waveforms and pitches using a rolling mill. The roof base plate is connected and fixed to the lower flange of the purlin using fasteners. A circular skylight is located in the central area of ​​the ring-shaped roof for lighting and ventilation.

[0068] It should be further noted that before installing the edge support 5 and the middle support 6, a layer of butyl tape 20 needs to be attached to each of the pre-positioned waterproof membrane 8. The first metal roof panel 31 and the second metal roof panel 32 are effectively connected to the edge support 5 and the middle support 6. At this point, the basic framework for the waterproofing, insulation, and heat insulation functions of the roof system is basically completed. Realizing the photovoltaic function of the building roof system depends on how to truly "integrate" the photovoltaic module 1 into the building materials. This utility model uses structural adhesive 7 spaced at intervals on the edge support surface 3111 and the middle support surface 3121 of the building photovoltaic metal roof panel 3. Using the structural adhesive 7 as an intermediary, the photovoltaic module 4 is "integrated" onto the building photovoltaic metal roof panel 3, completing the photovoltaic function of the building roof system and thus achieving the overall goal of building-photovoltaic integration.

[0069] Any aspects not described herein are applicable to existing technologies.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A building-integrated photovoltaic (BIPV) ring roof system, comprising a circular skylight (1), ring roof purlins (2) distributed around the circular skylight (1), and a building-integrated photovoltaic metal roof panel (3) fixedly connected to the ring roof purlins (2), characterized in that, The building photovoltaic metal roof panel (3) includes several first metal roof panels (31) and several second metal roof panels (32). The first metal roof panels (31) and the second metal roof panels (32) are staggered. The first metal roof panels (31) are roof panels of equal width arranged along the radial direction of the circular skylight (1) and photovoltaic modules (4) are integrated on them. The second metal roof panels (32) are fan-shaped roof panels arranged along the radial direction of the circular skylight (1). The annular roof purlin (2) is fixed with an edge support (5). The edge support (5) is provided with an upwardly extending interlocking piece (51). The edge support (5) forms an interlocking seal connection between the interlocking ribs I (311) on both sides of the first metal roof panel (31), the interlocking piece (51), and the interlocking ribs II (321) on both sides of the second metal roof panel (32) by gripping and locking the seam.

2. The building-integrated photovoltaic (BIPV) ring roof system according to claim 1, characterized in that, The annular roof purlin (2) is also provided with a central support (6), which is fixed at the middle position of each of the first metal roof panels (31). The central support (6) and the central wave rib (312) on the first metal roof panel (31) are connected by a snap-fit.

3. The building-integrated photovoltaic (BIPV) ring roof system according to claim 2, characterized in that, The inner side of the interlocking ribs I (311) on both sides of the first metal roof panel (31) forms a side support surface (3111), and the top of the middle wave rib (312) of the first metal roof panel (31) forms a middle support surface (3121). The middle support surface (3121) and the side support surface (3111) are located on the same plane. The side support surface (3111) and the middle support surface (3121) are respectively coated with structural adhesive (7). The lower end face of the photovoltaic module (4) is bonded and fixed with the structural adhesive (7).

4. The building-integrated photovoltaic (BIPV) ring roof system according to claim 3, characterized in that, The side support (5) is also provided with side supports (52) on both sides, and the side supports (52) are in contact with the side support surface (3111) on the first metal roof panel (31).

5. The building-integrated photovoltaic (BIPV) ring roof system according to any one of claims 2-4, characterized in that, Below the building photovoltaic metal roof panel (3), a waterproof membrane (8), thermal insulation cotton (9), and a roof base plate (10) are arranged in sequence. Butyl tape (20) is provided between the edge support (5) and the waterproof membrane (8) and between the middle support (6) and the waterproof membrane (8). The edge support (5) and the middle support (6) are fixedly connected to the annular roof purlin (2) by fastening connectors (30). The roof base plate (10) is fixedly connected to the lower flange of the annular roof purlin (2) by fastening connectors (30).

6. The building-integrated photovoltaic (BIPV) ring roof system according to claim 1, characterized in that, The photovoltaic module (4) is a monocrystalline silicon frameless double-layer glass module.

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