Composite beam and photovoltaic module mounting structure

Abstract

The application belongs to the field of photovoltaics, and particularly relates to a composite beam and a photovoltaic module mounting structure. The composite beam comprises a bent plate and an adapter plate. The bent plate comprises an arch plate section, a first ear plate section and a second ear plate section, and the first ear plate section and the second ear plate section are respectively located on the two sides of the arch plate section in a first direction. The adapter plate is connected to the inner side wall of the bent plate and comprises a first edging section and a second edging section located on the two sides of the bent plate in the first direction, the first edging section protrudes from the first ear plate section in the first direction, and the second edging section protrudes from the second ear plate section in the first direction. In the composite beam provided in the application, the first edging section and the second edging section can be fixedly matched with a roof structure layer through a welding process, holes are avoided in the roof structure layer, and damage to the original structure of the roof structure layer is prevented.

Description

Technical Field

[0001] This application belongs to the field of photovoltaics, and in particular relates to a composite beam and a photovoltaic module installation structure. Background Technology

[0002] Roof photovoltaics involves installing a solar photovoltaic power generation system on a building to directly convert solar energy into electrical energy for the building's own use or to feed it into the power grid.

[0003] Rooftop solar panel installations require brackets to support the solar modules. However, these brackets are typically secured with bolts, such as expansion bolts. This inevitably results in holes being drilled in the roof, and if the solar modules cover a large area, the number of holes can be enormous, potentially damaging the original roof structure. Utility Model Content

[0004] This application provides a composite beam and a photovoltaic module installation structure to solve the technical problem that existing photovoltaic module roof installation requires drilling holes in the roof, which damages the original roof structure.

[0005] This application provides a composite beam comprising a bent plate and a transition plate. The bent plate includes an arched section, a first ear plate section, and a second ear plate section, the first ear plate section and the second ear plate section being located on opposite sides of the arched section in a first direction. The transition plate is connected to the inner wall of the bent plate and includes a first trim section and a second trim section located on opposite sides of the bent plate in a first direction, the first trim section protruding beyond the first ear plate section in the first direction, and the second trim section protruding beyond the second ear plate section in the first direction.

[0006] In an optional embodiment of this application, the arch plate segment includes a supporting plate segment, a first side plate segment, and a second side plate segment. The arch plate segment is located on one side of the first ear plate segment and the second ear plate segment in a second direction. The first side plate segment connects the first ear plate segment and the supporting plate segment, and the second side plate segment connects the second ear plate segment and the supporting plate segment. The second direction is perpendicular to the first direction.

[0007] In an optional embodiment of this application, a first groove is formed on the inner side of the arch plate segment, and the first groove is gradually widened from the supporting plate segment toward the ear plate.

[0008] In an optional embodiment of this application, the support plate segment is formed with a second groove, the opening of which faces away from the ear plate.

[0009] In an optional embodiment of this application, the length of the second groove in the third direction is equal to the length of the supporting plate segment in the third direction; the third direction is perpendicular to the first direction and the second direction.

[0010] In an optional embodiment of this application, the transition plate includes an intermediate plate segment that connects the first trim segment and the second trim segment and is connected to the inner sidewall of the arched plate segment.

[0011] In the optional embodiments of this application, the adapter plate is a resin plate or a rubber plate.

[0012] In an optional embodiment of this application, the composite beam further includes an adhesive layer sandwiched between the bent plate and the transition plate.

[0013] In an optional embodiment of this application, the composite beam further includes multiple fasteners, which are disposed on both sides of the arch plate segment in the first direction and pass through the bending plate and the transition plate, for connecting the bending plate and the transition plate together.

[0014] In an optional embodiment of this application, an inner liner is also included, which is fastened to clamp the adapter plate between the inner liner and the bending plate.

[0015] A second aspect of this application provides a photovoltaic module installation structure, including a roof structure layer, a plurality of photovoltaic modules and a plurality of composite beams as described above; the plurality of composite beams are arranged at intervals along a first direction, and a first edge section and a second edge section are attached to the roof structure layer; the plurality of photovoltaic modules are arranged at intervals and connected to the arched sections of the plurality of composite beams.

[0016] In the optional scheme of this application, multiple junction boxes are also included, each junction box being located between two adjacent composite beams; the minimum distance between the junction box and the adjacent composite beam in the first direction is a, where a ≥ 20 mm, and the distance between the mating surface of the junction box and the photovoltaic module and the roof structural layer is b, where b ≥ 40 mm.

[0017] In the optional scheme of this application, the roof structure layer includes a roll material layer, a rock wool layer, a base plate and multiple purlins stacked from top to bottom; the multiple purlins are arranged at intervals, and the projections of the multiple purlins and multiple composite beams on the roll material layer intersect.

[0018] In summary, the solution provided in this application has at least the following beneficial effects:

[0019] The composite beam provided in this application includes a connecting bent plate and a transition plate. The bent plate is arched, and the transition plate is located inside the bent plate.

[0020] The middle part of the bent plate is an arched section. A first ear plate section extends from one side of the arched section along a first direction to ensure the connection area with the first trim section in the transition plate. A second ear plate section extends from the other side of the arched section along the first direction to ensure the connection area with the second trim section in the transition plate, thereby ensuring the reliability of the connection between the first trim section and the second trim section and the bent plate.

[0021] The first and second trim sections can be fixed to the roof structural layer through welding, avoiding drilling holes in the roof structural layer and thus preventing damage to its original structure. Furthermore, replacing the existing bolted connection with welding effectively reduces the risk of roof leaks. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the specific embodiments of this application, the drawings used in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a photovoltaic module installation structure provided according to one embodiment of this application.

[0024] Figure 2 for Figure 1 A schematic diagram of the cross-section of the composite beam.

[0025] Figure 3 This is a schematic cross-sectional view of a composite beam provided according to another embodiment of this application.

[0026] Figure 4 This is a schematic cross-sectional view of a composite beam provided according to yet another embodiment of this application.

[0027] Figure 5 for Figure 1 A cross-sectional view of the photovoltaic module installation structure from one perspective.

[0028] Figure 6 for Figure 5 A magnified view of the area at point S in the middle.

[0029] Figure 7 for Figure 1 A cross-sectional view of the photovoltaic module installation structure from another perspective.

[0030] Figure Labels

[0031] 100. Composite beam;

[0032] 10. Bending plate; 11. Arch plate segment; 111. Support plate segment; 112. First side plate segment; 113. Second side plate segment; 12. First ear plate segment; 13. Second ear plate segment; C1. First groove; C2. Second groove;

[0033] 20. Adapter panel; 21. First trim section; 22. Second trim section; 23. Middle panel section;

[0034] 30. Adhesive layer;

[0035] 40. Fasteners;

[0036] 50. Inner lining board;

[0037] 60. Roofing structural layer; 61. Roofing membrane layer; 62. Rock wool layer; 63. Base plate; 64. Purlin;

[0038] 70. Photovoltaic modules;

[0039] 80. Junction box; 90. Adhesive layer. Detailed Implementation

[0040] To make the above and other features and advantages of this application clearer, the application is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art and are exemplary only, not restrictive.

[0041] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] Figure 1 This is a schematic diagram of a photovoltaic module mounting structure according to one embodiment of this application. Please refer to... Figure 1 The photovoltaic module installation structure includes a composite beam 100, a roof structure layer 60, and multiple photovoltaic modules 70.

[0043] It should be noted that in the description of this application, the first direction, the second direction, and the third direction are perpendicular to each other, that is, the first direction is perpendicular to the second direction, and the third direction is perpendicular to both the first and second directions. The first direction, the second direction, and the third direction can be determined based on the composite beam 100. The first direction can be the width direction of the composite beam 100, the second direction can be the height direction of the composite beam 100, and the third direction can be the length direction of the composite beam 100.

[0044] Figure 2 for Figure 1 A schematic diagram of the cross-section of the composite beam 100 is shown below. It should be noted that the cross-section here refers to a plane perpendicular to a third direction (length direction) of the composite beam 100. Please refer to [link to relevant documentation]. Figure 2 The composite beam 100 includes a bent plate 10 and a transition plate 20.

[0045] The bent plate 10 includes an arch plate segment 11, a first ear plate segment 12, and a second ear plate segment 13. The first ear plate segment 12 and the second ear plate segment 13 are located on both sides of the arch plate segment 11 in a first direction.

[0046] The adapter plate 20 is connected to the inner wall of the bent plate 10 and includes a first trim section 21 and a second trim section 22 located on both sides of the bent plate 10 in a first direction. The first trim section 21 protrudes from the first ear plate section 12 in the first direction, and the second trim section 22 protrudes from the second ear plate section 13 in the first direction.

[0047] In this embodiment, the composite beam 100 is a multi-layer composite structural beam composed of at least a bent plate 10 and a transition plate 20. The bent plate 10 is the main load-bearing component of the composite beam 100, and the transition plate 20 is used to cooperate with the roof structure layer 60.

[0048] The cross-section of the bent plate 10 is arched to ensure its superior support performance. The middle part of the bent plate 10 is an arched section 11. A first ear plate section 12 extends from one side of the arched section 11 along a first direction to ensure the connection area with the first trim section 21. A second ear plate section 13 extends from the other side of the arched section 11 along the first direction to ensure the connection area with the second trim section 22, thereby ensuring the reliability of the connection between the first trim section 21 and the second trim section 22 and the bent plate 10.

[0049] In practical applications, the length of the single-sided ear plate segment extending in the first direction is about 2cm, and the length of the single-sided trim segment extending from the ear plate segment in the first direction is about 5cm.

[0050] Furthermore, multiple composite beams 100 are arranged at intervals along a first direction, and the first trim section 21 and the second trim section 22 are attached to the roof structural layer 60. Multiple photovoltaic modules 70 are arranged at intervals and connected to the arched sections 11 of the multiple composite beams 100.

[0051] In this embodiment, there are multiple composite beams 100, which, together with the roof structural layer 60, form a frame supporting the photovoltaic module 70. The multiple composite beams 100 are laid parallel and spaced apart in the first direction, which can evenly distribute the weight of the photovoltaic module 70 on the roof structural layer 60, avoid excessive local pressure on the roof structural layer 60, and thus prevent the formation of pits on the roof that can accumulate water.

[0052] The first trim section 21 and the second trim section 22 can be fixedly connected to the roof structural layer 60 by welding, avoiding drilling holes in the roof structural layer 60 and thus preventing damage to the original structure of the roof structural layer 60. Moreover, replacing the existing open-hole bolted connection with welding can effectively reduce the risk of roof leakage.

[0053] In practical applications, the bending plate 10 is a metal plate, such as stainless steel. The first trim section 21 and the second trim section 22 in the transition plate 20, and the roof structural layer 60, can be fixed by a hot-melt welding process, which is convenient and quick. The transition plate 20 is a polymer material plate, including, for example, rubber plates or resin plates. When the transition plate 20 is made of resin material, polyvinyl chloride resin can be used, with the addition of various additives and reinforcing materials. When the transition plate 20 is made of rubber material, polyvinyl chloride, chlorinated polyethylene, butylene propylene diene monomer (EPDM), ethylene propylene diene monomer (EPDM), etc., can be used.

[0054] It should be noted that, regarding the inside-outside relationship of the bent plate 10 in the second direction, the side of the bent plate 10 closer to the photovoltaic module 70 in the second direction is the outside, and the side farther away from the photovoltaic module 70 is the inside.

[0055] In a further optional embodiment, the arch plate segment 11 includes a supporting plate segment 111, a first side plate segment 112, and a second side plate segment 113, and the arch plate segment 11 is located on one side of the first ear plate segment 12 and the second ear plate segment 13 in a second direction.

[0056] The first side plate segment 112 connects the first ear plate segment 12 and the support plate segment 111, and the second side plate segment 113 connects the second ear plate segment 13 and the support plate segment 111.

[0057] In this embodiment, the arch plate segment 11 is formed by connecting the first side plate segment 112, the supporting plate segment 111 and the second side plate segment 113 in sequence along the first direction, and is arched. The first side plate segment 112 is connected between the first ear plate segment 12 and the supporting plate segment 111, and the second side plate segment 113 is connected between the second ear plate segment 13 and the supporting plate segment 111.

[0058] Among them, the supporting plate segment 111 is a plate and is connected to the photovoltaic module 70, which ensures that the bending plate 10 and the photovoltaic module 70 are in surface contact, thus ensuring the connection area and the connection reliability of the photovoltaic module 70.

[0059] In some alternative embodiments, the adapter plate 20 includes an intermediate plate segment 23 that connects the first trim segment 21 and the second trim segment 22 and is connected to the inner sidewall of the arch plate segment 11.

[0060] In this embodiment, the intermediate plate segment 23 connects the first trim segment 21 and the second trim segment 22 to form the transition plate 20. The intermediate plate segment 23 is connected to the arch plate segment 11, so that the entire transition plate 20 is connected to the bent plate 10 in a conformal manner, i.e., a double-layer connection structure, to ensure the structural strength of the composite beam.

[0061] In a further optional embodiment, a first groove C1 is formed on the inner side of the arch plate segment 11, and the first groove C1 is gradually widened from the support plate segment 111 toward the ear plate.

[0062] In this embodiment, the first groove C1 is formed by the support plate segment 111, the first side plate segment 112 and the second side plate segment 113. That is, the arch plate segment 11 forms the first groove C1. The first groove C1 is narrow at the top and wide at the bottom. That is, the cross-sectional shape of the middle part of the bent plate 10 is generally trapezoidal. This shape is more conducive to the bent plate 10 having better support performance.

[0063] Furthermore, the trapezoidal bent plate 10 is designed with a flat top primarily to ensure sufficient connection area with the photovoltaic module 70. Of course, the cross-section of the bent plate 10 can also be other arched structures with a flat top; no specific restrictions are placed here.

[0064] Figure 3 This is a schematic cross-sectional view of a composite beam 100 according to another embodiment of this application. See also... Figure 3 The supporting plate segment 111 has a second groove C2, the opening of which faces away from the ear plate.

[0065] In this embodiment, the opening of the second groove C2 is away from the ear plate, that is, the second groove C2 is located on the outside of the support plate segment 111. When the photovoltaic module 70 is connected to the support plate segment 111, the second groove C2 is located between the photovoltaic module 70 and the support plate segment 111.

[0066] The second slot C2 can hold the adhesive used to bond the photovoltaic module 70. The second slot C2 facilitates the storage of adhesive and reduces the overflow of adhesive in the second slot C2 when the photovoltaic module 70 is connected to the support plate segment 111.

[0067] In a further optional embodiment, the length of the second groove C2 in the third direction is equal to the length of the support plate segment 111 in the third direction.

[0068] In this embodiment, the length of the second groove C2 completely covers the length of the supporting plate segment 111, ensuring that a sufficiently long adhesive layer 90 can be formed to guarantee the reliability of the connection with the photovoltaic module 70. It should be noted that the adhesive layer 90 is formed by an adhesive, including, for example, structural adhesive.

[0069] In another optional embodiment, there are multiple second slots C2, which are arranged at intervals along a third direction. In specific applications, the number of photovoltaic modules 70 corresponding to a single composite beam 100 is equal to the number of second slots C2, that is, each photovoltaic module 70 corresponds to one second slot C2 on a single composite beam 100.

[0070] Please see Figure 2 and Figure 3In some alternative embodiments, the composite beam 100 further includes an adhesive layer 30 sandwiched between the bent plate 10 and the transition plate 20.

[0071] In this embodiment, the bending plate 10 and the adapter plate 20 are connected together by an adhesive layer 30. In specific applications, the adhesive layer 30 can be an adhesive film, which bonds and fuses the bending plate 10 and the adapter plate 20 together under high temperature and high pressure conditions.

[0072] In practical applications, both the bending plate 10 and the adapter plate 20 are covered with an adhesive layer 30 on their mating surfaces facing each other to ensure reliable connection.

[0073] Figure 4 This is a schematic cross-sectional view of a composite beam 100 according to yet another embodiment of this application. Please refer to... Figure 4 In some optional embodiments, the composite beam 100 further includes a plurality of fasteners 40 disposed on both sides of the arch plate segment 11 in a first direction and passing through the bending plate 10 and the transition plate 20, for connecting the bending plate 10 and the transition plate 20 together.

[0074] In this embodiment, the bending plate 10 and the adapter plate 20 are connected together by fasteners 40, which can be, for example, screws or rivets. The fasteners 40 are arranged on both sides of the arch plate section 11, specifically on the first side plate section 112 and the second side plate section 113. There are multiple fasteners 40 on both the first side plate section 112 and the second side plate section 113 to ensure reliable connection.

[0075] exist Figure 4 In the embodiment shown, the first side plate segment 112 and the second side plate segment are arranged in groups of two fasteners 40. Multiple groups of fasteners are arranged at intervals along the third direction to cover the entire composite beam 100, thereby ensuring the reliability of the splicing between the bending plate 10 and the transition plate 20.

[0076] In a further alternative, the composite beam 100 also includes an inner liner 50, which is fastened by fasteners 40 to clamp the adapter plate 20 between the inner liner 50 and the bending plate 10.

[0077] In this embodiment, when the bending plate 10 and the adapter plate 20 are connected together using fasteners 40, an additional inner lining plate 50 is provided. The inner lining plate 50 conforms to the inner side of the adapter plate 20. The fasteners 40 pass through the bending plate 10, the adapter plate 20 and the inner lining plate 50 to cooperate with the bending plate 10 to clamp the adapter plate 20, forming a three-layer structure to further improve the structural strength of the composite beam 100.

[0078] It should be noted that the splicing method between the bending plate 10 and the adapter plate 20 is not limited to the adhesive, screw, riveting and other methods provided in this application.

[0079] Figure 5 for Figure 1 A cross-sectional view of the photovoltaic module installation structure from one perspective. Figure 6 for Figure 5 A magnified view of a section at point S. Please refer to [link / reference]. Figure 5 and Figure 6 The photovoltaic module installation structure also includes multiple junction boxes 80, each junction box 80 being located between two adjacent composite beams 100;

[0080] The minimum distance between the junction box 80 and the adjacent composite beam 100 in the first direction is a, where a ≥ 20 mm, and the distance between the top wall of the junction box 80 and the roof structural layer 60 is b, where b ≥ 40 mm.

[0081] In this embodiment, the junction box 80 is used to connect the internal circuitry of the photovoltaic module to external wiring to transmit electrical energy. Junction boxes 80 are widely used in the photovoltaic field and will not be described in detail here.

[0082] The relative positional dimensions between junction box 80 and adjacent composite beam 100 are limited, mainly to ensure the operability of subsequent operation and maintenance of photovoltaic modules, and to ensure the space for wiring harness layout and ease of disassembly and assembly.

[0083] Figure 7 for Figure 1 The photovoltaic module installation structure is shown in a cross-sectional view from another perspective. In a further optional embodiment, the roof construction layer 60 includes a roll material layer 61, a rock wool layer 62, a base plate 63, and multiple purlins 64 stacked sequentially from top to bottom. The multiple purlins 64 are arranged at intervals, and the multiple purlins 64 intersect with the projections of multiple composite beams 100 on the roll material layer 61.

[0084] In this embodiment, the roof structure layer 60 is formed by stacking purlins 64, base plate 63, rock wool layer 62 and roll material layer 61 from bottom to top. The purlins 64 and composite beam 100 are arranged in an intersecting pattern in the second direction, which can provide better support for photovoltaic module 70.

[0085] To better illustrate this solution, the installation steps of the photovoltaic module mounting structure are described below.

[0086] a. After determining the installation position of the first composite beam 100, the decorative edge sections on both sides of the composite beam 100 are hot-melt welded to the roll material layer 61 of the roof structure layer 60 using a hot air welding process.

[0087] b. Repeat step a above at a position parallel to the first composite beam 100 to install the second composite beam 100, until all composite beams 100 are installed.

[0088] c. Apply structural adhesive to the top of the arch section 11 of all composite beams 100. Before the structural adhesive cures, connect the photovoltaic module 70 to the corresponding composite beam 100.

[0089] d. Repeat step c until all photovoltaic modules are successfully bonded and installed.

[0090] In summary, the composite beam provided in this application and the photovoltaic module installation structure constructed using the composite beam have at least the following advantages.

[0091] 1) The composite beam 100 is formed by bonding the arched bending plate 10 and the transition plate 20 together with an adhesive film under high temperature and high pressure. The bending plate 10 is a metal plate, and the transition plate 20 is a polymer material plate. The waterproof trim of the transition plate 20 is installed and fixed to the roof through a hot-melt process, without opening holes in the roof and without damaging the original roof.

[0092] 2) By not drilling holes in the roof, there is no risk of roof leaks.

[0093] 3) Multiple composite beams 100 are installed and laid evenly on the roof in the form of multiple parallel lines, which will not put excessive pressure on the local area of ​​the roof, will not cause the roof to sink, and will avoid water accumulation.

[0094] 4) Each composite beam 100 is fixed to the roof by hot melt welding, and the photovoltaic module 70 is fixed to the composite beam 100 by structural adhesive, which results in high installation efficiency.

[0095] It should be noted that the composite beam and photovoltaic module installation structure are not limited to the above. Secondly, although the embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A composite beam, characterized in that, include: A bent plate (10) includes an arched plate segment (11), a first ear plate segment (12), and a second ear plate segment (13), wherein the first ear plate segment (12) and the second ear plate segment (13) are respectively located on both sides of the arched plate segment (11) in a first direction; and The adapter plate (20) is connected to the inner wall of the bent plate (10) and includes a first trim section (21) and a second trim section (22) located on both sides of the bent plate (10) in the first direction. The first trim section (21) protrudes from the first ear plate section (12) in the first direction, and the second trim section (22) protrudes from the second ear plate section (13) in the first direction.

2. The composite beam according to claim 1, characterized in that, The arch plate segment (11) includes a supporting plate segment (111), a first side plate segment (112), and a second side plate segment (113). The arch plate segment (11) is located on one side of the first ear plate segment (12) and the second ear plate segment (13) in a second direction. The first side plate segment (112) connects the first ear plate segment (12) and the support plate segment (111), and the second side plate segment (113) connects the second ear plate segment (13) and the support plate segment (111); The second direction is perpendicular to the first direction.

3. The composite beam according to claim 2, characterized in that, A first groove (C1) is formed on the inner side of the arch plate segment (11), and the first groove (C1) is gradually widened from the supporting plate segment (111) toward the ear plate.

4. The composite beam according to claim 2, characterized in that, The supporting plate segment (111) has a second groove (C2) with the opening of the second groove (C2) facing away from the ear plate.

5. The composite beam according to claim 4, characterized in that, The length of the second groove (C2) in the third direction is equal to the length of the support plate segment (111) in the third direction; The third direction is perpendicular to the first direction and the second direction.

6. The composite beam according to claim 1, characterized in that, The adapter plate (20) includes a middle plate segment (23), which connects the first trim segment (21) and the second trim segment (22) and is connected to the inner wall of the arch plate segment (11).

7. The composite beam according to claim 1, characterized in that, The adapter plate (20) is a resin plate or a rubber plate.

8. The composite beam according to claim 1, characterized in that, The composite beam (100) further includes an adhesive layer (30) sandwiched between the bent plate (10) and the transition plate (20).

9. The composite beam according to any one of claims 1 to 8, characterized in that, The composite beam (100) also includes a plurality of fasteners (40), which are arranged on both sides of the arch plate segment (11) in the first direction and pass through the bending plate (10) and the transition plate (20) to connect the bending plate (10) and the transition plate (20) together.

10. The composite beam according to claim 9, characterized in that, It also includes an inner liner (50) which is fastened by the fastener (40) to hold the adapter plate (20) between the inner liner (50) and the bending plate (10).

11. A photovoltaic module mounting structure, characterized in that, It includes a roof structure layer (60), multiple photovoltaic modules (70), and multiple composite beams (100) according to any one of claims 1 to 10; The composite beams (100) are arranged at intervals along the first direction, and the first trim section (21) and the second trim section (22) are attached to the roof structure layer (60); Multiple photovoltaic modules (70) are arranged at intervals and connected to the arched sections (11) of multiple composite beams (100).

12. The photovoltaic module mounting structure according to claim 11, characterized in that, It also includes a plurality of junction boxes (80), each of the junction boxes (80) being located between two adjacent composite beams (100); The minimum distance between the junction box (80) and the adjacent composite beam (100) in the first direction is a, where a ≥ 20 mm. The distance between the mating surfaces of the junction box (80) and the photovoltaic module (70) and the roof structure layer (60) is b, where b ≥ 40 mm.

13. The photovoltaic module mounting structure according to claim 11, characterized in that, The roof structure layer (60) includes a roll material layer (61), a rock wool layer (62), a base plate (63), and multiple purlins (64) stacked from top to bottom; Multiple purlins (64) are arranged at intervals, and the projections of the multiple purlins (64) and the multiple composite beams (100) on the roll layer (61) intersect.

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