Photovoltaic frame, photovoltaic module and roof photovoltaic system

Abstract

The utility model discloses a photovoltaic frame, a photovoltaic module and a roof photovoltaic system, the photovoltaic frame is used for the photovoltaic module, and the photovoltaic frame comprises a first frame, a second frame and two third frames; wherein the two third frames are symmetrically arranged, the two ends of the first frame are connected with one ends of the two third frames respectively, the two ends of the second frame are connected with the other ends of the two third frames respectively, and a rectangular frame is defined by the first frame, the second frame and the two third frames; the tops of the two ends of the second frame in the length direction are flush with the top of the first frame or higher than the top of the first frame, and the tops of the two ends of the second frame in the length direction are flush with the tops of the two third frames or lower than the tops of the two third frames. According to the photovoltaic frame, it can be guaranteed that the corresponding cover plate is fully attached to the top of the third frame, the structure is stable and reliable, and the waterproof effect is good.

Description

Technical Field

[0001] The present application relates to a solar photovoltaic system, and particularly to a photovoltaic frame, a photovoltaic module, and a roof photovoltaic system. Background Art

[0002] With the development of the photovoltaic industry, there are more and more large-scale ground power stations, and the excellent land resources for the construction of photovoltaic power stations are decreasing day by day. Moreover, with the continuous popularization of green buildings in recent years, roof photovoltaic power stations have received increasing attention. When building a roof photovoltaic system on a roof, the waterproof effect of the roof and the fixing effect of the photovoltaic modules are basic considerations.

[0003] Some existing roof photovoltaic systems usually include a plurality of photovoltaic modules arranged horizontally and vertically. The two end frames of the photovoltaic module are respectively connected to the two end frames of its adjacent photovoltaic module. The two side frames of the photovoltaic module correspond to the two side frames of its adjacent photovoltaic module respectively, and a cover plate is used to cover the tops of the two corresponding side frames for waterproofing and the like. However, there will be gaps between the cover plate and the tops of the two corresponding side frames, which affects the waterproof effect and the like. Summary of the Utility Model

[0004] The purpose of the present application is to provide a photovoltaic frame, a photovoltaic module, and a roof photovoltaic system with stable and reliable structures and good waterproof effects.

[0005] In order to solve at least one of the above technical problems, the technical solution of the present application is as follows:

[0006] According to the first aspect of the present application, a photovoltaic frame for a photovoltaic module is provided. The photovoltaic frame includes: a first frame, a second frame, and two third frames; wherein, the two third frames are symmetrically arranged, one end of the first frame is respectively connected to one end of the two third frames, the two ends of the second frame are respectively connected to the other end of the two third frames, and the first frame, the second frame, and the two third frames enclose a rectangular frame; the tops of the two ends in the length direction of the second frame are flush with the top of the first frame or higher than the top of the first frame, and the tops of the two ends in the length direction of the second frame are flush with the top of the two third frames or lower than the top of the two third frames.

[0007] In a possible implementation of the above first aspect, a lapping cover plate protruding outward is provided on the top of the second frame, a plug-in plate is provided on the lapping cover plate, the plug-in plate is located below the lapping cover plate, and a plug-in groove is provided at the upper outer side of the first frame. When the second frame of a photovoltaic frame is used to be correspondingly connected to the first frame of another photovoltaic frame, the plug-in groove is connected to the corresponding plug-in plate and the lapping cover plate laps on the top of the corresponding first frame.

[0008] In a possible implementation of the above first aspect, the insertion slot and the inserted board connected thereto are sealed by structural adhesive.

[0009] In a possible implementation of the above first aspect, a convex structure for positioning and supporting is provided at the bottom of each third frame, and a frame support plate for supporting is provided at the lower end of one side in the length direction of each third frame. The bottoms of the frame support plates are flush with the bottoms of the first frame and the second frame respectively.

[0010] According to a second aspect of the present application, a photovoltaic module is provided, including: a photovoltaic frame, which is the above-mentioned photovoltaic frame; and a photovoltaic laminate, which is arranged in the photovoltaic frame.

[0011] According to a third aspect of the present application, a roof photovoltaic system is provided, including: a plurality of photovoltaic modules, which are the above-mentioned photovoltaic modules, and the plurality of photovoltaic modules are used to be distributed in multiple rows and columns on the roof. Each row of photovoltaic modules is arranged horizontally along the roof, and each column of photovoltaic modules is arranged longitudinally along the roof. The length direction of the second frame of each photovoltaic module is consistent with the horizontal direction of the roof, and the length direction of the third frame of each photovoltaic module is consistent with the longitudinal direction of the roof; a plurality of longitudinal water troughs, and the length direction of each longitudinal water trough is consistent with the longitudinal direction of the roof; a plurality of waterproof covers, and the length direction of each waterproof cover is consistent with the longitudinal direction of the roof; wherein, corresponding connections are formed between the first frame and the second frame of two adjacent photovoltaic modules in each column of photovoltaic modules respectively, and a pair of adjacent third frames are formed between two adjacent photovoltaic modules in each row of photovoltaic modules. Each column of photovoltaic modules corresponds to a longitudinal water trough and a waterproof cover respectively. Each longitudinal water trough is used to support the bottoms of each pair of adjacent third frames of the two columns of photovoltaic modules corresponding thereto respectively, and each waterproof cover is used to cover and press on the tops of each pair of adjacent two third frames of the two columns of photovoltaic modules corresponding thereto respectively. Each longitudinal water trough is used to be connected to each purlin on the roof respectively, and the length direction of each purlin is consistent with the horizontal direction of the roof.

[0012] In a possible implementation of the above third aspect, each longitudinal water trough includes: a trough main body, the length direction of the trough main body is consistent with the longitudinal direction of the roof, and a main trough, two frame installation slots and two secondary troughs that all penetrate along its length direction and open upwards are provided on the trough main body. The main trough is located between the two frame installation slots, and the two frame installation slots are located between the secondary troughs. Each frame installation slot is respectively used to cooperate with the convex structure of each corresponding third frame. The frame support plate is arranged on the inner side of the third frame. A support seat is provided at the top of one side of each frame installation slot away from the main trough, and each support seat extends towards the adjacent secondary trough. Each support seat is used to cooperate with the frame support plate of each corresponding third frame.

[0013] In a possible implementation of the above-mentioned third aspect, a plurality of first fasteners are provided on each waterproof cover plate. The plurality of first fasteners are arranged at intervals in sequence along the length direction of the waterproof cover plate and are used to connect the waterproof cover plate to the corresponding longitudinal water trough below it.

[0014] In a possible implementation of the above-mentioned third aspect, fastening baffles extending towards the middle are symmetrically provided on both sides of the top of the main water trough. The lower end of each first fastener passes through between the two opposite fastening baffles and is provided with a first limiting member, and the first limiting member is located in the main water trough. The upper end of each first fastener passes through the waterproof cover plate and is provided with a first locking member, and the first locking member is located above the waterproof cover plate. A waterproof cap sleeving the outside of the first locking member is further provided on the top of each first fastener.

[0015] In a possible implementation of the above-mentioned third aspect, the roof photovoltaic system further includes: a plurality of transverse water troughs. The length direction of each transverse water trough is consistent with the transverse direction of the roof. A fifth trough body penetrating along its length direction and opening upwards is provided on each transverse water trough. The transverse water troughs correspond one-to-one with the corresponding second side frames and first side frames. Each transverse water trough is used to be arranged on the purlin and is located below the corresponding second side frame and first side frame. One end of each transverse water trough close to the corresponding longitudinal water trough is located above the auxiliary water trough so that the water in the fifth trough body can flow into the auxiliary water trough.

[0016] In a possible implementation of the above-mentioned third aspect, the bottoms of the corresponding second side frames and first side frames are respectively pressed against the bottom surfaces of the fifth trough bodies of the corresponding transverse water troughs. <s

[0017] In a possible implementation of the above-mentioned third aspect, the roof photovoltaic system further includes: a plurality of fixing components. Each longitudinal water trough and each purlin are respectively connected through the fixing components.

[0018] In a possible implementation of the above-mentioned third aspect, the bottom of each transverse water trough is pressed against the top of the corresponding fixing component.

[0019] In a possible implementation of the above-mentioned third aspect, each fixing component includes: two pressing blocks. The two pressing blocks are used to cooperate with the two auxiliary water troughs of the corresponding longitudinal water trough one-to-one, and the two pressing blocks are used to connect with the corresponding purlin.

[0020] In a possible implementation of the above-mentioned third aspect, a third trough body corresponding to the side wall of the auxiliary water trough is provided on each pressing block. The third trough body penetrates the pressing block along the length direction of the auxiliary water trough and opens downwards. A lower pressing plate is provided on one side of the bottom of the pressing block and a footrest is provided on the other side of its bottom. The footrest is used to press against the purlin, and the lower pressing plate is used to press against the bottom surface in the auxiliary water trough.

[0021] In a possible implementation of the above-mentioned third aspect, the bottom of each transverse water tank presses against the top of the corresponding pressing block. The top of each pressing block is provided with a second support platform for cooperating with the bottom of the transverse water tank. Each pressing block is connected to its corresponding purlin through a hoop. The second support platform is provided with a fourth groove corresponding to the hoop, and the fourth groove penetrates the second support platform along the length direction of the auxiliary water tank.

[0022] In a possible implementation of the above-mentioned third aspect, the roof photovoltaic system further includes: a plurality of support brackets, which correspond to the longitudinal water tanks one by one. The length direction of each support bracket is the same as the length direction of the longitudinal water tank and is used to support the corresponding longitudinal water tank. Each support bracket is used to be connected to each purlin respectively.

[0023] In a possible implementation of the above-mentioned third aspect, a first groove corresponding to the support bracket is provided on the bottom of each water tank body, and the first groove penetrates along the length direction of the water tank body. The top of the support bracket is used to support the bottom surface of the first groove.

[0024] In a possible implementation of the above-mentioned third aspect, a second groove that penetrates along its length direction and has an upward opening is provided on each support bracket. The support bracket and each purlin are respectively connected through second fasteners, and each second fastener is located on the bottom surface of its corresponding second groove. On both sides of the top of the second groove, first support platforms that extend towards the middle and are used to cooperate with the bottom surface of the first groove are respectively provided.

[0025] In a possible implementation of the above-mentioned third aspect, the first groove is located below the main water tank and the corresponding positions of the two frame mounting grooves and between the two auxiliary water tanks.

[0026] At least one of the above technical solutions of the present application has the following beneficial effects:

[0027] For the photovoltaic frame according to the present application, when multiple photovoltaic frames are distributed in multiple rows and columns, for two adjacent photovoltaic frames in each column of photovoltaic frames, the first frame of one photovoltaic frame is correspondingly connected to the second frame of the other photovoltaic frame. A pair of adjacent third frames are formed between two adjacent photovoltaic frames in each row of photovoltaic frames. The tops of each pair of adjacent third frames are waterproofed by pressing with corresponding cover plates. The tops of all the third frames are in the same plane, the tops of all the second frames are in the same plane, and the tops of all the first frames are in the same plane. When the corresponding cover plate is pressed against the tops of each pair of adjacent third frames, if the tops at both ends in the length direction of the second frame or the tops at both ends in the length direction of the first frame are higher than the tops of the third frames, it will cause a gap between the cover plate and its corresponding third frame, affecting the waterproof effect, etc. Therefore, the tops at both ends in the length direction of the second frame of the present application are flush with or higher than the tops of the first frame, and the tops at both ends in the length direction of the second frame are flush with or lower than the tops of the two third frames, that is, the third frame is higher than or flush with the first frame and the second frame, so that the cover plate fits fully with the tops of each pair of adjacent third frames, avoiding the generation of gaps between the cover plate and the tops of the third frames. Thus, the photovoltaic frame of the present application can ensure that the corresponding cover plate fits fully with the tops of each pair of adjacent third frames, improving the waterproof effect, and has a stable and reliable structure, improving the service life, etc.

[0028] Further, in the present application, a convex structure is provided at the bottom of the third frame, and a frame support plate is provided at the lower end of one side in the length direction of the third frame. The convex structure cooperates with the groove on the corresponding water tank support member for positioning and support, and at the same time, the frame support plate cooperates with the table top on the water tank support member for support, so as to ensure that the third frame is placed more stably, with a stable structure, and is not likely to cause deformation of the frame and the water tank support member, affecting the waterproof effect, etc., and has high safety and reliability, improving the service life.

[0029] For the photovoltaic module according to the present application, by adopting the above-mentioned photovoltaic frame, it can ensure that the corresponding cover plate fits fully with the tops of each pair of adjacent third frames, avoid the generation of gaps between the cover plate and the tops of the third frames, improve the waterproof effect, and has a stable and reliable structure, improving the service life, etc.

[0030] For the roof photovoltaic system according to the present application, by adopting the above-mentioned photovoltaic module, it can ensure that the waterproof cover plate fits fully with the tops of each pair of adjacent third frames, avoid the generation of gaps between the waterproof cover plate and the tops of the third frames, improve the waterproof effect, and has a stable and reliable structure, improving the service life, etc.

[0031] In addition, in the technical solution of the present application, unless otherwise specifically stated, the present technical solution can be implemented by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Structural schematic diagram of a photovoltaic frame according to an embodiment of the present application;

[0034] Figure 2 Top view of a photovoltaic frame according to an embodiment of the present application;

[0035] Figure 3 Structural schematic diagram of a first frame according to an embodiment of the present application;

[0036] Figure 4 Structural schematic diagram of a second frame according to an embodiment of the present application;

[0037] Figure 5 Structural schematic diagram of a third frame according to an embodiment of the present application;

[0038] Figure 6 Connection schematic diagram of a first frame and a second frame according to an embodiment of the present application;

[0039] Figure 7 Structural schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0040] Figure 8 Top view of a roof photovoltaic system according to an embodiment of the present application;

[0041] Figure 9 Structural schematic diagram of a longitudinal water trough according to an embodiment of the present application;

[0042] Figure 10 Structural schematic diagram of a waterproof cover plate according to an embodiment of the present application;

[0043] Figure 11 Structural schematic diagram of a support bracket according to an embodiment of the present application;

[0044] Figure 12 Structural schematic diagram of the connection between two adjacent photovoltaic modules in each column of photovoltaic modules according to an embodiment of the present application;

[0045] Figure 13 Structural schematic diagram of a pressing block according to an embodiment of the present application;

[0046] Figure 14 Schematic diagram of the connection structure between two adjacent photovoltaic modules in each row of photovoltaic modules of this application;

[0047] Figure 15 Of an embodiment of this application Figure 14 Partial enlarged view of location A in

[0048] Figure 16 Partial structure schematic diagram of the roof photovoltaic system of an embodiment of this application.

[0049] Explanation of reference numerals in the drawings:

[0050] Photovoltaic module 1000; photovoltaic frame 1100; first frame 1110; insertion slot 1111; first corner code slot 1112; first groove 1113; second frame 1120; overlapping cover plate 1121; insertion plate 1122; second corner code slot 1123; second groove 1124; third frame 1130; protruding structure 1131; frame support plate 1132; third corner code slot 1133; third groove 1134; photovoltaic laminate 1200;

[0051] Longitudinal water trough 2000; main water trough 2001; frame installation slot 2002; auxiliary water trough 2003; support seat 2004; fastening baffle 2005; first trough body 2006; water trough main body 2007;

[0052] Waterproof cover plate 3000; first fastener 3001; first limiting member 3002; first locking member 3003; waterproof cap 3004;

[0053] Transverse water trough 4000; fifth trough body 4001;

[0054] Fixing assembly 5000; pressing block 5100; third trough body 5101; foot seat 5102; lower pressing plate 5103; second support platform 5104; fourth trough body 5105; hoop 5200;

[0055] Support bracket 6000; second trough body 6001; second fastener 6002; first support platform 6003;

[0056] Purlin 7000. Detailed implementation manners

[0057] To make the objectives, technical solutions and advantages of this application more clearly understood, the following further details this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are some but not all of the embodiments of this application, and are only used to explain this application, not to limit this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0058] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "both ends", "both sides", "bottom", "top", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the indicated elements must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. In addition, terms such as "first", "second", "superior", "inferior", "main", "secondary", etc. are only used for descriptive purposes and can be simply used to more clearly distinguish different components, rather than indicating or implying relative importance.

[0059] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0060] In this application, the X direction and the Y direction are given. The X direction is the transverse direction of the roof surface, and the Y direction is the longitudinal direction of the roof surface. The X direction is perpendicular to the Y direction. The "upper", "lower", etc. in the text are based on the vertical direction as the reference.

[0061] ]>See Figures 1 - 7 As shown, the photovoltaic frame 1100 provided according to the embodiment of this application is used for the photovoltaic module 1000. The photovoltaic frame 1100 includes: a first frame 1110, a second frame 1120, and two third frames 1130.

[0062] Among them, the two third side frames 1130 are symmetrically arranged. Two ends of the first side frame 1110 are respectively connected to one end of the two third side frames 1130, and two ends of the second side frame 1120 are respectively connected to the other end of the two third side frames 1130. The two third side frames 1130 are parallel to each other, the first side frame 1110 is parallel to the second side frame 1120, the third side frame 1130 is perpendicular to the first side frame 1110 and the second side frame 1120, and the first side frame 1110, the second side frame 1120 and the two third side frames 1130 enclose a rectangular frame. Tops of two ends in the length direction of the second side frame 1120 are flush with or higher than the top of the first side frame 1110, and tops of two ends in the length direction of the second side frame 1120 are flush with or lower than the tops of the two third side frames 1130.

[0063] It should be noted that tops of two ends in the length direction of the second side frame 1120 being flush with or higher than the top of the first side frame 1110 may be that tops of two ends in the length direction of the second side frame 1120 are flush with or higher than tops of two ends in the length direction of the first side frame 1110, or the top of the second side frame 1120 is flush with or higher than the top of the first side frame 1110; tops of two ends in the length direction of the second side frame 1120 being flush with or lower than the tops of the two third side frames 1130 may be that the top of the second side frame 1120 is flush with or lower than the tops of the two third side frames 1130; the first side frame 1110, the second side frame 1120 and the third side frame 1130 may adopt aluminum alloy side frames, etc.

[0064] That is to say, when multiple photovoltaic frames 1100 are distributed in multiple rows and columns, the tops of all the third frames 1130 are located on the same plane, the tops of all the second frames 1120 are located on the same plane, and the tops of all the first frames 1110 are located on the same plane. For two adjacent photovoltaic frames 1100 in each column of photovoltaic frames 1100, the first frame 1110 of one photovoltaic frame 1100 is cooperatively connected to the second frame 1120 of the other photovoltaic frame 1100. A pair of adjacent third frames 1130 are formed between two adjacent photovoltaic frames 1100 in each row of photovoltaic frames 1100, and the corresponding cover plate is pressed against the tops of each pair of adjacent third frames 1130. If the tops at both ends in the length direction of the second frame 1120 or the tops at both ends in the length direction of the first frame 1110 are higher than the tops of the third frames 1130, it will cause a gap between the cover plate and its corresponding third frame 1130, affecting the waterproof effect and the like. Therefore, the tops at both ends in the length direction of the second frame 1120 of the present application are flush with the tops of the first frames 1110, or the tops at both ends in the length direction of the second frame 1120 are higher than the tops of the first frames 1110, the tops at both ends in the length direction of the second frame 1120 are flush with the tops of the two third frames 1130, or the tops at both ends in the length direction of the second frame 1120 are lower than the tops of the two third frames 1130, so that the cover plate fits well with the tops of each pair of adjacent third frames 1130, avoiding the generation of gaps between the cover plate and the tops of the third frames 1130 and improving the waterproof effect.

[0065] Thus, the photovoltaic frame 1100 of the present application can ensure that the corresponding cover plate fits well with the tops of each pair of adjacent third frames 1130, avoiding the generation of gaps between the cover plate and the tops of the third frames 1130, improving the waterproof effect, and having a stable and reliable structure, improving the service life and the like.

[0066] In some embodiments, as Figure 3 、 4 shown in and 6, the top of the second frame 1120 is provided with a lap cover plate 1121 extending outwards, and a plug-in plate 1122 is arranged on the lap cover plate 1121. The plug-in plate 1122 is located below the lap cover plate 1121, and a plug-in slot 1111 is arranged at the upper outer end of the first frame 1110. When the second frame 1120 of one photovoltaic frame 1100 is used for corresponding connection with the first frame 1110 of another photovoltaic frame 1100, the plug-in slot 1111 is connected to its corresponding plug-in plate 1122, and the lap cover plate 1121 laps on the top of the corresponding first frame 1110.

[0067] That is to say, the top of the second frame 1120 is self-equipped with a cover plate structure. The top of the overlapping cover plate 1121 is the top of the second frame 1120. The top of the second frame 1120 is higher than the top of the first frame 1110. When two photovoltaic frames 1100 are connected, the second frame 1120 of one photovoltaic frame 1100 cooperates with the first frame 1110 of the other photovoltaic frame 1100. The insertion plate 1122 of the second frame 1120 is inserted into the insertion slot 1111 of the corresponding first frame 1110, and the overlapping cover plate 1121 of the second frame 1120 is pressed against the top of the first frame 1110, so that the two photovoltaic frames 1100 are connected. Thus, the operation is convenient, the connection is tight, the gap at the connection can be reduced, the waterproof effect is better, and the structure is more stable and reliable.

[0068] In some embodiments, as Figure 6 shown, the insertion slot 1111 and the connected insertion plate 1122 are sealed with structural adhesive. The structural adhesive has the advantages of high strength, being able to withstand large loads, aging resistance, fatigue resistance, corrosion resistance, stable performance, etc. Thus, not only the connection is tighter and the waterproof effect is better, but also the structural strength is high and the service life is longer. Those skilled in the art can understand that other sealants in the prior art can also be used to seal between the insertion slot 1111 and the connected insertion plate 1122.

[0069] In some embodiments, as Figure 5 shown, a convex structure 1131 for positioning and supporting is provided at the bottom of each third frame 1130, and a frame support plate 1132 for supporting is provided at the lower end of one side in the length direction of each third frame 1130. The bottoms of the frame support plates 1132 are flush with the bottom of the first frame 1110 and the bottom of the second frame 1120 respectively. Among them, the frame support plate 1132 can be provided inside the third frame 1130. It should be noted that the inner side of the third frame 1130 is the side of the third frame 1130 close to the inside of the photovoltaic frame 1100, and the outer side of the third frame 1130 is the side of the third frame 1130 far from the inside of the photovoltaic frame 1100. The same applies to the first frame 1110 and the second frame 1120.

[0070] That is to say, a convex structure 1131 is provided at the bottom of the third frame 1130, and a frame support plate 1132 is provided at the lower end of one side in the length direction of the third frame 1130. For example, when the photovoltaic module 1000 is installed on a corresponding water tank support member, the convex structure 1131 of the third frame 1130 cooperates with a corresponding groove on the water tank support member for positioning, limiting and fixed support. At the same time, the frame support plate 1132 cooperates with a corresponding table surface on the water tank support member for support, so that the third frame 1130 is stably placed on the water tank support member. Thereby, the operation is more convenient, the structure is more stable, and it is not easy to cause deformation of the frame and the water tank support member, which affects the waterproof effect, etc. The safety and reliability are high, and the service life is improved.

[0071] In some embodiments, as Figures 3 - 5 shown, a first corner code groove 1112 penetrating along its length direction is provided in the first frame 1110, a second corner code groove 1123 penetrating along its length direction is provided in the second frame 1120, and a third corner code groove 1133 penetrating along its length direction is provided in the third frame 1130. That is to say, in the photovoltaic frame 1100, the first corner code groove 1112 of the first frame 1110 is respectively communicated with the third corner code grooves 1133 of the two third frames 1130, and the second corner code groove 1123 of the second frame 1120 is also respectively communicated with the third corner code grooves 1133 of the two third frames 1130. The two connected corner code grooves are connected and fixed by a corner code connector. Thereby, the operation is more convenient, and the structure is more compact and stable.

[0072] Referring to Figure 7 shown, the photovoltaic module 1000 provided according to the embodiment of the present application includes: a photovoltaic frame 1100 and a photovoltaic laminate 1200.

[0073] Among them, the photovoltaic frame 1100 is the above-mentioned photovoltaic frame 1100, and the photovoltaic laminate 1200 is placed in the photovoltaic frame 1100. As Figures 3 - 5As shown in the figure, a first groove 1113 penetrating along its length direction is provided at the inner upper end of the first frame 1110. The opening of the first groove 1113 faces the inside of the photovoltaic frame 1100. A second groove 1124 penetrating along its length direction is provided at the inner upper end of the second frame 1120. The opening of the second groove 1124 faces the inside of the photovoltaic frame 1100. A third groove 1134 penetrating along its length direction is provided at the inner upper end of the third frame 1130. The opening of the third groove 1134 faces the inside of the photovoltaic frame 1100. The first groove 1113 is respectively communicated with the two third grooves 1134, and the second groove 1124 is also respectively communicated with the two third grooves 1134. The first groove 1113, the second groove 1124 and the two third grooves 1134 form a rectangular annular groove for placing the photovoltaic laminate 1200. In addition, the photovoltaic laminate 1200 and each groove can also be sealed with sealant.

[0074] Thus, the photovoltaic module 1000 of the present application adopts the above-mentioned photovoltaic frame 1100, which can not only ensure that the corresponding cover plate fully fits the top of each pair of adjacent third frames 1130, avoid the generation of gaps between the cover plate and the top of the third frame 1130, improve the waterproof effect, but also has a stable and reliable structure, and improves the service life, etc.

[0075] See Figures 8 - 16 As shown in the figure, the roof photovoltaic system provided by the embodiment of the present application further includes: a plurality of photovoltaic modules 1000, a plurality of longitudinal water troughs 2000 and a plurality of waterproof cover plates 3000.

[0076] Among them, the photovoltaic module 1000 is the above-mentioned photovoltaic module 1000. The plurality of photovoltaic modules 1000 are used to be distributed in multiple rows and columns on the roof (not shown). Each row of photovoltaic modules 1000 is arranged along the transverse direction (i.e., the X direction) of the roof, and each column of photovoltaic modules 1000 is arranged along the longitudinal direction (i.e., the Y direction) of the roof. The length direction of the second frame 1120 of each photovoltaic module 1000 is consistent with the transverse direction of the roof, and the length direction of the third frame 1130 of each photovoltaic module 1000 is consistent with the longitudinal direction of the roof, as Figure 8As shown, each row of photovoltaic modules 1000 may include eight photovoltaic modules 1000, and each column of photovoltaic modules 1000 may include three photovoltaic modules 1000. The length direction of each longitudinal water trough 2000 and the length direction of each waterproof cover plate 3000 are both consistent with the longitudinal direction of the roof. Each waterproof cover plate 3000 is located above its corresponding longitudinal water trough 2000. A corresponding first frame 1110 and second frame 1120 are respectively formed between two adjacent photovoltaic modules 1000 in each column of photovoltaic modules 1000. A pair of adjacent third frames 1130 are formed between two adjacent photovoltaic modules 1000 in each row of photovoltaic modules 1000. Each longitudinal water trough 2000 and each waterproof cover plate 3000 are respectively corresponding to two adjacent columns of photovoltaic modules 1000. Each longitudinal water trough 2000 is used to support the bottoms of each pair of adjacent third frames 1130 of the two columns of photovoltaic modules 1000 corresponding to it respectively. Each waterproof cover plate 3000 is used to cover and press on the tops of each pair of adjacent two third frames 1130 in the two columns of photovoltaic modules 1000 corresponding to it respectively. Each longitudinal water trough 2000 is used to be respectively connected to each purlin 7000 on the roof. The length direction of each purlin 7000 is consistent with the transverse direction of the roof.

[0077] It should be noted that multiple purlins 7000 are usually arranged on the roof. The length direction of each purlin 7000 is consistent with the transverse direction of the roof. The multiple purlins 7000 are arranged at equal intervals. The roof is usually an inclined plane. The purlin 7000 at the top of the roof forms a ridge. The ridge direction is parallel to the transverse direction of the roof. The longitudinal direction of the roof is perpendicular to the ridge direction. In addition, the longitudinal water trough 2000 and the waterproof cover plate 3000 can be made of aluminum alloy, etc. When the lengths of the waterproof cover plate 3000 and the longitudinal water trough 2000 are relatively long, the waterproof cover plate 3000 and the longitudinal water trough 2000 can also be spliced by multiple segments. For example, the waterproof cover plate 3000 can be spliced by gluing, and the longitudinal water trough 2000 can be spliced with corresponding connectors.

[0078] That is to say, the tops of all the third side frames 1130 are located in the same plane, the tops of all the second side frames 1120 are located in the same plane, and the tops of all the first side frames 1110 are located in the same plane. When the waterproof cover plate 3000 is pressed on the tops of each pair of adjacent two third side frames 1130 in the two columns of photovoltaic modules 1000 corresponding thereto, since the tops at both ends in the length direction of the second side frame 1120 are flush with the tops of the first side frame 1110, or the tops at both ends in the length direction of the second side frame 1120 are higher than the tops of the first side frame 1110, the tops at both ends in the length direction of the second side frame 1120 are flush with the tops of the two third side frames 1130, or the tops at both ends in the length direction of the second side frame 1120 are lower than the tops of the two third side frames 1130, the contact area between the waterproof cover plate 3000 and the third side frame 1130 is large, so that the waterproof cover plate 3000 is fully attached to the tops of each pair of adjacent third side frames 1130, avoiding the generation of gaps between the cover plate and the tops of the third side frame 1130, improving the waterproof effect, and having a closer connection, good fastening effect, and also improving the structural strength, etc.

[0079] Therefore, the roof photovoltaic system of the present application adopts the above-mentioned photovoltaic module 1000, which can not only ensure that the waterproof cover plate 3000 is fully attached to the tops of each pair of adjacent third side frames 1130, avoid the generation of gaps between the waterproof cover plate 3000 and the tops of the third side frame 1130, improve the waterproof effect, but also has a stable and reliable structure, improve the service life, etc., and is convenient to be better used in Building Integrated Photovoltaic (BIPV).

[0080] In some embodiments, a convex structure for positioning and supporting is provided at the bottom of each third side frame, and a side frame support plate for supporting is provided at the lower end of one side in the length direction of each third side frame. The bottoms of the side frame support plates are respectively flush with the bottoms of the first side frame and the second side frame. Figures 8 - 16As shown in the figure, each longitudinal water trough 2000 includes: a water trough main body 2007. Among them, the length direction of the water trough main body 2007 is consistent with the longitudinal direction of the roof. On the water trough main body 2007, there are provided a main water trough 2001 that runs through along its length direction and has an upward opening, two frame installation grooves 2002, and two secondary water troughs 2003. The main water trough 2001 is located between the two frame installation grooves 2002, and the two frame installation grooves 2002 are located between the secondary water troughs 2003. Each frame installation groove 2002 is respectively used to cooperate with the convex structure 1131 of each corresponding third frame 1130. The frame support plate 1132 is arranged on the inner side of the third frame 1130. On the top of each side away from the main water trough 2001 of each frame installation groove 2002, there are respectively provided support seats 2004. Each support seat 2004 extends towards the direction of the adjacent secondary water trough 2003. Each support seat 2004 is used to cooperate with the frame support plate 1132 of each corresponding third frame 1130. The width of the support seat 2004 should be slightly larger than the width of the frame support plate 1132, so as to ensure that the support seat 2004 can better support the frame support plate 1132.

[0081] That is to say, the main water trough 2001 and the two secondary water troughs 2003 of the longitudinal water trough 2000 are respectively used to converge and guide rainwater, and the frame support plate 1132 will not affect the main water trough 2001. When the roof photovoltaic system bears a large load, the photovoltaic module 1100 is subjected to a downward pressure, and the photovoltaic laminate 1200 will sink downward, so that the upper end of the third frame 1130 tilts inward, and the lower end of the third frame 1130 tilts outward. Therefore, the convex structures 1131 of each pair of adjacent third frames 1130 correspond one by one to the two frame installation grooves 2002 on the longitudinal water trough 2000 below them, and the frame support plates 1132 of each pair of adjacent third frames 1130 correspond one by one to the two support seats 2004 on the longitudinal water trough 2000 below them. Each convex structure 1131 is respectively inserted into the corresponding frame installation groove 2002 for positioning, limiting, and fixed support. Each frame support plate 1132 is respectively pressed against the corresponding support seat 2004 for support, so that each pair of adjacent third frames 1130 are stably placed on the water trough support member, which can effectively limit the deformation of the frame, etc. Thus, the operation is more convenient, the structure is more stable, and it is not easy to cause the deformation of the frame and the longitudinal water trough 2000, which affects the waterproof effect, etc. The safety and reliability are high, and the service life is improved.

[0082] In some embodiments, such as Figure 10 、 14As shown in FIGS. 14 and 15, a plurality of first fasteners 3001 are provided on each waterproof cover plate 3000. The plurality of first fasteners 3001 are arranged at intervals in sequence along the length direction of the waterproof cover plate 3000. The plurality of first fasteners 3001 are used to connect the waterproof cover plate 3000 with the corresponding longitudinal water tank 2000 below it. That is to say, each waterproof cover plate 3000 is connected to the corresponding longitudinal water tank 2000 below it through a plurality of first fasteners 3001, so that the waterproof cover plate 3000 presses the top of each pair of adjacent third side frames 1130 corresponding to it, and each convex structure 1131 is respectively inserted into the corresponding frame mounting groove 2002 for positioning, limiting and fixed support, and each side frame support plate 1132 respectively presses against the corresponding support seat 2004 for support, thereby making the operation more convenient, the structure more stable and reliable, etc.

[0083] In some embodiments, as Figure 10 , 14 ~16 shown, fastening baffles 2005 extending towards the middle are symmetrically arranged on both sides of the top of the main water tank 2001. The lower end of each first fastener 3001 passes through between the two opposite fastening baffles 2005 and is provided with a first limiting member 3002. The first limiting member 3002 is located in the main water tank 2001. The upper end of each first fastener 3001 passes through the waterproof cover plate 3000 and is provided with a first locking member 3003. The first locking member 3003 is located above the waterproof cover plate 3000. A waterproof cap 3004 sleeved outside the first locking member 3003 is further provided on the top of each first fastener 3001. For example, the first fastener 3001 is a bolt, the first limiting member 3002 is the head of the bolt, the first locking member 3003 is a nut arranged on the bolt, and the waterproof cap 3004 is a waterproof nut. Waterproof glue can also be applied between the waterproof nut and the waterproof cover plate 3000 for sealing.

[0084] That is to say, the side frame support plate 1132 and the fastening baffle 2005 are respectively located on both sides of the corresponding third side frame 1130 and do not affect each other; the distance between the two opposite fastening baffles 2005 is greater than the outer diameter of the first fastener 3001 and less than the outer diameter of the first limiting member 3002, so that the first limiting member 3002 is limited in the main water tank 2001 and can only move along the length direction of the main water tank 2001. The first limiting member 3002 presses against the two fastening baffles 2005, and the waterproof cover plate 3000 is locked by each nut. Thus, the operation is more convenient, the structure is more compact and stable, and the waterproof cap 3004 can also prevent the first locking member 3003 from being eroded by rainwater.

[0085] In some embodiments, as Figure 12 , 14As shown in FIGS. 0 to 16, the roof photovoltaic system further includes: a plurality of transverse water troughs 4000. Wherein, the length direction of each transverse water trough 4000 is consistent with the transverse direction of the roof, and a fifth trough 4001 is provided on each transverse water trough 4000 and penetrates along its length direction with an upward opening. The transverse water troughs 4000 correspond one-to-one with the corresponding second frames 1120 and the first frames 1110. Each transverse water trough 4000 is used to be arranged on the purlin 7000 and below the corresponding second frame 1120 and the first frame 1110. The bottoms of the corresponding second frame 1120 and the first frame 1110 are respectively pressed against the bottom surface of the fifth trough 4001 of the corresponding transverse water trough 4000. One end of each transverse water trough 4000 close to the corresponding longitudinal water trough 2000 is located above the secondary water trough 2003, so that the water in the fifth trough 4001 can flow into the secondary water trough 2003. The corresponding second frame 1120 and the first frame 1110 can be connected by the above-mentioned overlapping cover plate 1121, plug-in plate 1122 and plug-in groove 1111 structure.

[0086] That is to say, a transverse water trough 4000 corresponds to the bottom of each corresponding second frame 1120 and the first frame 1110 respectively. The bottoms of the corresponding second frame 1120 and the first frame 1110 are pressed against the bottom surface of the fifth trough 4001 of the corresponding transverse water trough 4000. Moreover, one end of each transverse water trough 4000 close to the corresponding longitudinal water trough 2000 is located above the secondary water trough 2003, so that the rainwater in the fifth trough 4001 can flow into the secondary water trough 2003. Thus, Figures 14 - 15 Taking [reference] as a reference, by arranging the transverse water troughs 4000, on the one hand, the rainwater leaking from the roof photovoltaic system can be converged and diverted. The rainwater in the fifth trough 4001 of the transverse water trough 4000 can flow freely in the horizontal direction, which is convenient for the rainwater in the fifth trough 4001 to flow into the secondary water trough 2003 of the longitudinal water trough 2000. On the other hand, it can also support the corresponding second frame 1120 and the first frame 1110, share the load of the longitudinal water trough 2000, reduce the risk of bending deformation of the frame and the longitudinal water trough 2000, improve the structural strength and bending resistance of the roof photovoltaic system, etc., and the safety and reliability are higher.

[0087] In some embodiments, as Figures 14 - 16 shown, the roof photovoltaic system further includes: a plurality of fixing components 5000. Wherein, each longitudinal water trough 2000 and each purlin 7000 are respectively connected by a fixing component 5000. The bottom of each transverse water trough 4000 can also be pressed against the top of the corresponding fixing component 5000.

[0088] That is to say, on the one hand, the fixing component 5000 connects and fixes the longitudinal water trough 2000 to the purlin 7000. On the other hand, the bottom of the transverse water trough 4000 presses against the top of the corresponding fixing component 5000. The fixing component 5000 can also support the transverse water trough 4000, making the operation more convenient, with higher structural strength and bending resistance, etc.

[0089] In some embodiments, as Figures 13 - 16 shown, each fixing component 5000 includes: two pressing blocks 5100. Among them, the two pressing blocks 5100 are used to cooperate with the two secondary water troughs 2003 of the corresponding longitudinal water trough 2000 one by one, and the two pressing blocks 5100 are used to connect with the corresponding purlin 7000. That is to say, the two pressing blocks 5100 are installed on the purlin 7000, and the two pressing blocks 5100 respectively press the two secondary water troughs 2003, so that the longitudinal water trough 2000 is fixed on the purlin 7000, thus making the operation more convenient, the force more uniform, and the structure more stable.

[0090] Furthermore, each pressing block 5100 is provided with a third groove 5101 corresponding to the side wall of the secondary water trough 2003. The third groove 5101 penetrates the pressing block 5100 along the length direction of the secondary water trough 2003 and opens downward. One side of the bottom of the pressing block 5100 is provided with a footrest 5102 and the other side of its bottom is provided with a lower pressing plate 5103. The footrest 5102 is used to press against the purlin 7000, and the lower pressing plate 5103 is used to press against the bottom surface inside the secondary water trough 2003. Each pressing block 5100 and its corresponding purlin 7000 can be connected by a hoop 5200 or other fasteners.

[0091] That is to say, the side wall of the secondary water trough 2003 is inserted into the third groove 5101 of the pressing block 5100, the lower pressing plate 5103 presses against the bottom surface inside the secondary water trough 2003, the footrest 5102 presses against the purlin 7000, and the pressing block 5100 and the purlin 7000 are connected by a hoop 5200, so that the longitudinal water trough 2000 is fixed on the purlin 7000, thus making the operation more convenient, the structure more compact and stable, etc.

[0092] Furthermore, the bottom of each transverse water trough 4000 presses against the top of the corresponding pressing block 5100. The top of each pressing block 5100 is provided with a second support platform 5104 for cooperating with the bottom of the transverse water trough 4000. The second support platform 5104 is provided with a fourth groove 5105 corresponding to the hoop 5200. The fourth groove 5105 penetrates the second support platform 5104 along the length direction of the secondary water trough 2003.

[0093] That is to say, on the one hand, the bottom surface of each transverse water trough 4000 presses against the tabletop of the second support platform 5104, increasing the contact area, ensuring that the transverse water trough 4000 is more stable, greatly reducing the risk of frame deformation, and making the structure more stable. On the other hand, the hoop 5200 can be hidden in the fourth trough body 5105, without affecting the transverse water trough 4000, and making the structure more compact, etc.

[0094] In some embodiments, as Figure 10 , 14 As shown in FIGS. 15, the roof photovoltaic system further includes: a plurality of support brackets 6000. Among them, the support brackets 6000 correspond to the longitudinal water troughs 2000 one by one. The length direction of each support bracket 6000 is the same as the length direction of the longitudinal water trough 2000. Each support bracket 6000 is used to support the corresponding longitudinal water trough 2000. Each support bracket 6000 is used to be connected to each purlin 7000 respectively. The support brackets 6000 can be made of steel. The length of each support bracket 6000 can be the same as the length of the longitudinal water trough 2000. Each support bracket 6000 can also be formed by splicing multiple segments. A first trough body 2006 corresponding to the support bracket 6000 is provided on the bottom of each trough body 2007. The first trough body 2006 runs through along the length direction of the trough body 2007. The top of the support bracket 6000 is used to support the bottom surface of the first trough body 2006.

[0095] That is to say, the support brackets 6000 support the longitudinal water troughs 2000, sharing the load of the longitudinal water troughs 2000, improving the strength and bending resistance of the longitudinal water troughs 2000. Moreover, the support brackets 6000 are located in the longitudinal water troughs 2000, making the structure more compact, stable, and with higher load-bearing capacity.

[0096] Furthermore, a second trough body 6001 that runs through along its length direction and has an upward opening is provided on each support bracket 6000. The support brackets 6000 and the respective purlins 7000 are connected by second fasteners 6002 respectively. Each of the second fasteners 6002 is located on the bottom surface of its corresponding second trough body 6001. First support platforms 6003 that extend toward the middle and are used to cooperate with the bottom surface of the first trough body 2006 are provided on both sides of the top of the second trough body 6001.

[0097] That is to say, the two first support platforms 6003 support the longitudinal water trough 2000 respectively. The second fasteners 6002 pass through between the two first support platforms 6003 and connect the support brackets 6000 and the purlins 7000, so that the structure is simple and the operation is more convenient and fast.

[0098] In addition, a second limiting member (not shown) and a second locking member (not shown) are provided on the second fastener 6002. The second fastener 6002 can be a bolt, the second limiting member is the head of the bolt, and the second locking member is a nut provided on the bolt.

[0099] In some embodiments, as Figure 15 shown, the first groove 2006 is located below the main water tank 2001 and corresponding to the two frame mounting grooves 2002 and between the two auxiliary water tanks 2003. Taking Figure 15 as a reference, the two frame mounting grooves 2002 are symmetrically located on both sides above the first groove 2006, the main water tank 2001 is located in the middle of the first groove 2006, the cross-section of the convex structure 1131 along the length direction perpendicular to the third frame 1130 is square, the first support platform 6003 is a flat plate structure, the first support platform 6003 is parallel to the bottom surface of the convex structure 1131, and the width of the first support platform 6003 is greater than half of the width of the bottom surface of the convex structure 1131. Thus, the structure is more stable, ensuring better support for the longitudinal water tank 2000 and preventing deformation of the frame and the water tank, etc.

[0100] Based on the above embodiments of the present application, without explicit negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0101] The above are only some embodiments of the present application, which are only used to illustrate the technical solutions of the present application and are not intended to limit it. It should be understood that for those of ordinary skill in the art, without departing from the creative concept of the present application, improvements or substitutions can be made according to the above description, and all such improvements and substitutions should fall within the protection scope of the appended claims of the present application. In this case, all details can be replaced by equivalent elements, and the materials, shapes and sizes can also be arbitrary.

Claims

1. A photovoltaic frame for a photovoltaic module, characterized in that, The photovoltaic frame includes: A first frame, a second frame, and two third frames; Wherein, the two third frames are symmetrically arranged. One end of the first frame is respectively connected to one end of the two third frames, and the two ends of the second frame are respectively connected to the other end of the two third frames. The first frame, the second frame, and the two third frames enclose a rectangular frame; The tops at both ends in the length direction of the second frame are flush with or higher than the top of the first frame, and the tops at both ends in the length direction of the second frame are flush with or lower than the tops of the two third frames.

2. The photovoltaic frame according to claim 1, wherein, A lapping cover plate protruding outward is provided at the top of the second frame. A plug-in plate is provided on the lapping cover plate, and the plug-in plate is located below the lapping cover plate. A plug-in groove is provided at the upper end outside the first frame. When the second frame of one photovoltaic frame is correspondingly connected to the first frame of another photovoltaic frame, the plug-in groove is connected to the corresponding plug-in plate, and the lapping cover plate laps on the top of the corresponding first frame; The plug-in groove and the connected plug-in plate are sealed with structural adhesive; and / or, A protruding structure for positioning and supporting is provided at the bottom of each third frame. A frame support plate for supporting is provided at the lower end of one side in the length direction of each third frame, and the bottoms of the frame support plates are flush with the bottom of the first frame and the bottom of the second frame respectively.

3. A photovoltaic module, characterized in that, Comprising: A photovoltaic frame, and the photovoltaic frame is the photovoltaic frame described in claim 1 above; A photovoltaic laminate, and the photovoltaic laminate is arranged in the photovoltaic frame.

4. A roof photovoltaic system, characterized in that, Comprising: Multiple photovoltaic modules, and the photovoltaic modules are the photovoltaic modules described in claim 3 above. The multiple photovoltaic modules are used to be distributed in multiple rows and columns on the roof. Each row of photovoltaic modules is arranged horizontally along the roof, and each column of photovoltaic modules is arranged vertically along the roof. The length direction of the second frame of each photovoltaic module is consistent with the horizontal direction of the roof, and the length direction of the third frame of each photovoltaic module is consistent with the vertical direction of the roof; Multiple longitudinal water troughs, and the length direction of each longitudinal water trough is consistent with the vertical direction of the roof; Multiple waterproof cover plates, and the length direction of each waterproof cover plate is consistent with the vertical direction of the roof; Among them, corresponding first frames and second frames are respectively formed between two adjacent photovoltaic modules in each column of the photovoltaic modules. A pair of adjacent third frames are formed between two adjacent photovoltaic modules in each row of the photovoltaic modules. One longitudinal water trough and one waterproof cover plate respectively correspond to two adjacent columns of the photovoltaic modules. Each longitudinal water trough is used to support the bottoms of each pair of adjacent third frames of the two columns of photovoltaic modules corresponding to it respectively. Each waterproof cover plate is used to cover and press on the tops of each pair of adjacent two third frames in the two columns of photovoltaic modules corresponding to it respectively. Each longitudinal water trough is used to be respectively connected to each purlin on the roof. The length direction of each purlin is consistent with the transverse direction of the roof.

5. The roof photovoltaic system according to claim 4, characterized in that, A convex structure for positioning and supporting is provided at the bottom of each third frame. A frame support plate for support is provided at the lower end of one side in the length direction of each third frame. The bottoms of the frame support plates are flush with the bottoms of the first frame and the second frame respectively. Each longitudinal water trough includes: A water trough main body, the length direction of the water trough main body is consistent with the longitudinal direction of the roof. A main water trough, two frame installation grooves and two secondary water troughs which all penetrate along its length direction and open upwards are provided on the water trough main body. The main water trough is located between the two frame installation grooves. The two frame installation grooves are located between the secondary water troughs. Each frame installation groove is respectively used to cooperate with the convex structure of each corresponding third frame. The frame support plate is arranged on the inner side of the third frame. A support seat is respectively provided at the top of one side of each frame installation groove far from the main water trough. Each support seat extends towards the secondary water trough close to it. Each support seat is used to cooperate with the frame support plate of each corresponding third frame.

6. The roof photovoltaic system according to claim 5, characterized in that, A plurality of first fasteners are provided on each waterproof cover plate. The plurality of first fasteners are arranged at intervals in sequence along the length direction of the waterproof cover plate and are used to connect the waterproof cover plate to the corresponding longitudinal water trough below it; Fastening baffles extending towards the middle are symmetrically provided on both sides of the top of the main water trough. The lower end of each first fastener passes through between two opposite fastening baffles and is provided with a first limiting member. The first limiting member is located in the main water trough. The upper end of each first fastener passes through the waterproof cover plate and is provided with a first locking member. The first locking member is located above the waterproof cover plate. A waterproof cap sleeved outside the first locking member is further provided at the top of each first fastener.

7. The roof photovoltaic system according to claim 5, characterized in that, It further includes: A plurality of transverse water troughs, the length direction of each of the transverse water troughs being consistent with the transverse direction of the roof surface. A fifth trough body is provided on each of the transverse water troughs, penetrating along its length direction and opening upward. The transverse water troughs correspond one-to-one with the corresponding second side frames and the first side frames. Each of the transverse water troughs is used to be arranged on the purlin and located below the corresponding second side frame and the first side frame. One end of each of the transverse water troughs close to the corresponding longitudinal water trough is located above the auxiliary water trough so that the water in the fifth trough body can flow into the auxiliary water trough; the bottom parts of the corresponding second side frame and the first side frame respectively press against the bottom surface of the fifth trough body of the corresponding transverse water trough.

8. The roof photovoltaic system according to claim 7, characterized in that, Further comprising: A plurality of fixing components, each of the longitudinal water troughs and each of the purlins are respectively connected through the fixing components; the bottom of each of the transverse water troughs presses against the top of the corresponding fixing component.

9. The roof photovoltaic system according to claim 8, characterized in that, Each of the fixing components includes: Two pressing blocks, the two pressing blocks are used to cooperate with the two auxiliary water troughs of the corresponding longitudinal water trough one-to-one, and the two pressing blocks are used to be connected with the corresponding purlin.

10. The roof photovoltaic system according to claim 9, characterized in that, Each of the pressing blocks is provided with a third trough body corresponding to the side wall of the auxiliary water trough, the third trough body penetrates the pressing block along the length direction of the auxiliary water trough and opens downward. A lower pressing plate is arranged on one side of the bottom of the pressing block, and a footrest is arranged on the other side of its bottom. The footrest is used to press against the purlin, and the lower pressing plate is used to press against the bottom surface inside the auxiliary water trough; The bottom of each of the transverse water troughs presses against the top of the corresponding pressing block. A second support platform for cooperating with the bottom of the transverse water trough is arranged on the top of each of the pressing blocks. Each of the pressing blocks is connected with the corresponding purlin through a hoop. A fourth trough body corresponding to the hoop is arranged on the second support platform, and the fourth trough body penetrates the second support platform along the length direction of the auxiliary water trough.

11. The roof photovoltaic system according to claim 5, characterized in that, Further comprising: A plurality of support brackets, the support brackets correspond one-to-one with the longitudinal water troughs. The length direction of each of the support brackets is consistent with the length direction of the longitudinal water trough and is used to support the corresponding longitudinal water trough. Each of the support brackets is used to be respectively connected with each of the purlins.

12. The roof photovoltaic system according to claim 11, wherein, A first trough body corresponding to the support bracket is arranged on the bottom of each of the water trough bodies, the first trough body penetrates along the length direction of the water trough body, and the top of the support bracket is used to support the bottom surface of the first trough body; A second trough body penetrating along its length direction and opening upward is arranged on each of the support brackets. The support brackets and each of the purlins are respectively connected through second fasteners, and each of the second fasteners is located on the bottom surface of the corresponding second trough body. First support platforms extending towards the middle are respectively arranged on both sides of the top of the second trough body and are used to cooperate with the bottom surface of the first trough body; The first trough body is located below the main water trough and corresponding to the two side frame installation grooves and between the two auxiliary water troughs.

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