Fastening structure and photovoltaic roof

Abstract

The utility model relates to a fastening structure and a photovoltaic roof, the fastening structure is applied to the photovoltaic roof, and the photovoltaic roof comprises photovoltaic tiles; the fastening structure comprises a fastening piece and a waterproof cover, the fastening piece comprises a limiting part and a connecting part which are connected with each other, the connecting part is constructed to be a rotating body, the limiting part protrudes out of the connecting part in the radial direction of the connecting part, and the fastening piece is used for penetrating through a connecting hole in a photovoltaic tile to be connected with a tile hanging strip; the waterproof cover is provided with an avoiding hole, the fastener penetrates through the avoiding hole, and the bottom face of the limiting part abuts against the top face of the waterproof cover. Wherein the waterproof cover is provided with a waterproof cavity, and the waterproof cavity is matched with a boss on the photovoltaic tile. Because the boss on the photovoltaic tile is higher than the surface of the photovoltaic tile, a certain distance is reserved between the opening part of the connecting hole and the surface of the photovoltaic tile, and rainwater is not easy to enter the connecting hole. In addition, the waterproof cover is arranged on the boss and can block rain, so that rainwater is prevented from leaking from the connecting hole. Therefore, the waterproof performance of the photovoltaic roof can be improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic roofing technology, and in particular to a fastening structure and a photovoltaic roof. Background Technology

[0002] With the rapid development of the BIPV (Building Integrated Photovoltaics) market in recent years, its application scenarios have become increasingly diverse. Classified by application scenario, the main types include photovoltaic curtain walls, photovoltaic skylights, photovoltaic shading corridors, rooftop photovoltaic tiles, and other applications (such as photovoltaic railings and photovoltaic floor tiles). These buildings can not only generate electricity self-sufficiently, but also transmit excess electricity to the grid, realizing energy feedback and trading.

[0003] In rooftop photovoltaic (PV) systems, PV modules can be installed on roof tiles, or the PV modules can directly replace the roof tiles in the form of PV tiles. Roof tiles or PV tiles are typically fixed to the roof battens with screws. In existing technologies, regardless of whether countersunk screws, cylindrical head screws, or pan head screws are used, gaps remain at the junction of the screw and the tile, posing a risk of leakage. This risk of leakage gradually increases with the duration of use of the PV system. Utility Model Content

[0004] Therefore, it is necessary to provide a fastening structure and a photovoltaic roof to address the technical problem of water leakage at the connection between screws and tiles in photovoltaic roofs in related technologies.

[0005] A fastening structure is used in a photovoltaic roof, the photovoltaic roof comprising photovoltaic tiles; the fastening structure includes:

[0006] Fasteners, which are configured as rotating bodies, are used to connect to the roof strips by passing through connection holes on the photovoltaic tiles;

[0007] A waterproof cap, the waterproof cap being attached to one end of the fastener, and the waterproof cap protruding from the fastener in the radial direction of the fastener;

[0008] The waterproof cover is provided with a waterproof cavity, which is adapted to the protrusion on the photovoltaic tile.

[0009] In one embodiment, the fastener and the waterproof cover are an integral structure.

[0010] In one embodiment, the boss is a rotating structure, and the waterproof cavity is a rotating cavity.

[0011] In one embodiment, the sidewall of the waterproof cavity is conical, and the distance between the sidewall of the waterproof cavity and the fastener gradually decreases from the end facing the batten to the end away from the batten. In one embodiment, the waterproof cover has an outwardly protruding limiting portion at the end away from the batten, the limiting portion including at least a pair of parallel side surfaces.

[0012] In one embodiment, the waterproof cover has a snap-fit ​​groove on the end face away from the batten strip, the snap-fit ​​groove being able to engage with the tool head of an auxiliary tool.

[0013] In one embodiment, the fastener has external threads on its outer peripheral surface, and the end of the fastener away from the waterproof cover is constructed to be tapered.

[0014] In one embodiment, the fastening structure further includes a sealing gasket disposed at the bottom of the waterproof cavity.

[0015] In one embodiment, the fastening structure further includes:

[0016] A waterproof layer is applied to the surface of the waterproof cover and the fastener.

[0017] A photovoltaic roof, the photovoltaic roof including the fastening structure as described above.

[0018] The beneficial effects of this utility model are:

[0019] A fastening structure is disclosed, in which fasteners are used to connect photovoltaic (PV) tiles to battens. Specifically, the connection between the PV tiles and battens is achieved by connecting the fasteners through connection holes on the PV tiles. A waterproof cover is connected to the fasteners, and the waterproof cover protrudes radially from the fasteners to facilitate the creation of a waterproof cavity on the waterproof cover. Furthermore, the radial dimension of the waterproof cover is set to be larger than that of the fastener to increase the contact area between the waterproof cover and the PV tiles, thereby improving connection strength and waterproofing performance. By creating a waterproof cavity on the waterproof cover, which is adapted to a protrusion on the PV tile, the opening of the connection hole is kept at a certain distance from the surface of the PV tile, preventing rainwater from easily entering the connection hole. The waterproof cover on the protrusion further protects against rain, preventing rainwater leakage from the connection hole. This structure not only achieves a secure connection between the PV tiles and battens but also improves the waterproofing performance of the PV roof. Attached Figure Description

[0020] Figure 1A schematic diagram of the fastening structure provided in one embodiment of the utility model after being connected to the photovoltaic tile and the tile strip.

[0021] Figure 2 A schematic diagram of the fastening structure after it is connected to the photovoltaic tile, according to an embodiment of the utility model.

[0022] Figure 3 A cross-sectional view of the fastening structure after it is connected to the photovoltaic tile, according to an embodiment of the utility model.

[0023] Figure 4 A three-dimensional structural diagram of a fastening structure provided in an embodiment of the utility model.

[0024] Figure 5 A cross-sectional schematic diagram of a fastening structure provided in an embodiment of the utility model.

[0025] Figure 6 A cross-sectional structural diagram of the inner side surface of the waterproof cavity in a fastening structure provided in an embodiment of the utility model is a conical surface.

[0026] Figure label:

[0027] Fastening structure 100; Fastener 110; Waterproof cover 120; Waterproof cavity 121; Photovoltaic tile 200; Boss 210; Tile strip 300. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figures 1 to 6This utility model provides a fastening structure 100 for use in a photovoltaic roof, which includes photovoltaic tiles 200. The fastening structure 100 includes a fastener 110 and a waterproof cover 120. The fastener 110 includes a limiting part and a connecting part that are connected to each other. The connecting part is constructed as a rotating body. The limiting part protrudes from the connecting part in the radial direction of the connecting part. The fastener 110 is used to pass through the connecting hole on the photovoltaic tile 200 and connect with the tile strip 300. The waterproof cover 120 is provided with a clearance hole. The fastener 110 passes through the clearance hole, and the bottom surface of the limiting part abuts against the top surface of the waterproof cover 120. The waterproof cover 120 is provided with a waterproof cavity 121, which is adapted to the boss 210 on the photovoltaic tile 200.

[0035] This technical solution provides a fastening structure 100, wherein a fastener 110 is used to connect the photovoltaic tile 200 and the tile strip 300. Specifically, the connection between the photovoltaic tile 200 and the tile strip 300 is achieved by connecting the fastener 110 through a connecting hole on the photovoltaic tile 200. A waterproof cover 120 is connected to the fastener 110, and the waterproof cover 120 protrudes from the fastener 110 in the radial direction to facilitate the provision of a waterproof cavity 121 on the waterproof cover 120. In addition, the radial dimension of the waterproof cover 120 is set to be larger than the radial dimension of the fastener 110 to increase the contact area between the waterproof cover 120 and the photovoltaic tile 200, thereby improving the connection strength and the waterproof performance.

[0036] Furthermore, the connection hole is located on the boss 210, and a waterproof cavity 121 is provided on the waterproof cover 120. By adapting the waterproof cavity 121 to the boss 210 on the photovoltaic tile 200, and since the boss 210 on the photovoltaic tile 200 is higher than the surface of the photovoltaic tile 200, the opening of the connection hole is a certain distance from the surface of the photovoltaic tile 200, making it difficult for rainwater to enter the connection hole. In addition, the waterproof cover 120 is provided on the boss 210, which can block rainwater, thus preventing rainwater from leaking down from the connection hole. Through the above structure, not only can the fixed connection between the photovoltaic tile 200 and the batten strip 300 be achieved, but it also helps to improve the waterproof performance of the photovoltaic roof.

[0037] like Figure 1 As shown, it should be understood that in a photovoltaic roof, the photovoltaic tile 200 is fixedly connected to the tile strip 300 via the fastening structure 100 described above to form a photovoltaic roof. In this embodiment, a boss 210 protruding from the surface of the photovoltaic tile 200 is provided at the position corresponding to the connection hole through which the fastener 110 passes, and the connection hole penetrates both the photovoltaic tile 200 and the boss 210. Furthermore, the connection hole is located at the center of the boss 210.

[0038] Specifically, a recessed groove is provided on the bottom surface of the waterproof cover 120. When the waterproof cover 120 is connected to the fastener 110, the side wall of the recessed groove on the waterproof cover 120 and the outer surface of the fastener 110 enclose and define the waterproof cavity 121.

[0039] The waterproof cover 120 and the fastener 110 can be an integral structure or a separate structure. When the waterproof cover 120 and the fastener 110 are separate structures, the waterproof cover 120 and the fastener 110 are sealed together to prevent rainwater from flowing in through the gap between the waterproof cover 120 and the fastener 110.

[0040] like Figure 5 and Figure 6 As shown, in a preferred embodiment, the fastener 110 and the waterproof cover 120 are integrally formed. Making the fastener 110 and the waterproof cover 120 integrally formed not only reduces assembly difficulty but also improves the sealing performance between the fastener 110 and the waterproof cover 120. It is understood that by integrally forming the fastener 110 and the waterproof cover 120, there are no gaps between them, effectively preventing water leakage.

[0041] In one embodiment, the fastener 110 has external threads on its outer peripheral surface, and the end of the fastener 110 facing away from the waterproof cover 120 is constructed in a tapered shape. The external threads on the outer peripheral surface of the fastener 110 allow for a threaded connection between the fastener 110 and the batten strip 300. The tapered shape of the end of the fastener 110 facing away from the waterproof cover 120 allows for a self-tapping structure to be formed through the tapered surface, thereby increasing the preload between the fastener 110 and the batten strip 300.

[0042] Furthermore, a chip guide groove can be provided on the conical surface of the end of the fastener 110 facing away from the waterproof cover 120. The chip guide groove can be spiral-shaped. By providing a chip guide groove on the self-tapping part of the fastener 110, the chips generated during self-tapping can be hidden and discharged, thereby reducing resistance and thus helping to reduce the torque when tightening the fastener 110, thereby saving effort.

[0043] like Figure 3 As shown, in one embodiment, the boss 210 is a rotating structure, and the waterproof cavity 121 is a rotating cavity. By setting the boss 210 as a rotating structure and the waterproof cavity 121 as a rotating cavity, the waterproof cover 120 can rotate relative to the boss 210 when the fastener 110 is tightened, thereby facilitating a tight connection between the fastener 110 and the batten strip 300.

[0044] It is understandable that, such as Figure 3 and Figure 5As shown, the boss 210 can be cylindrical, while the waterproof cavity 121 is an annular cavity. This design is simple in structure and easy to process and form.

[0045] like Figure 6 As shown, in one embodiment, the sidewall of the waterproof cavity 121 is conical, and the distance between the sidewall of the waterproof cavity 121 and the fastener 110 gradually decreases from the end toward the batten 300 to the end away from the batten 300. By setting the sidewall of the waterproof cavity 121 to a conical surface, and the radial dimension of the waterproof cavity 121 gradually increases from the end away from the batten 300 to the end closer to the batten 300, the wall thickness of the sidewall of the waterproof cover 120 is set to gradually decrease from the end away from the batten 300 to the end closer to the batten 300. This is beneficial to improving the structural strength of the fastening structure 100, thereby extending its service life. When the waterproof cavity 121 is set to a conical surface, the boss 210 is also set to a frustum. This allows the boss 210 to conformally fit the waterproof cavity 121 of the waterproof cover 120. In addition, when connecting the fastening structure 100 to the photovoltaic tile 200, the fastening structure 100 can be guided by the conical surface of the waterproof cavity 121 of the waterproof cover 120 and the conical surface of the boss 210, thereby giving the fastening structure 100 a self-centering property and improving the connection efficiency between the photovoltaic tile 200 and the tile strip 300.

[0046] like Figure 4 As shown, in one embodiment, the waterproof cover 120 has an outwardly protruding limiting portion at the end opposite to the batten 300, the limiting portion including at least a pair of parallel side surfaces. This design allows the fastening structure 100 to be tightened by using a wrench or screwdriver in conjunction with the limiting portion when connecting the fastening structure 100 to the batten 300, thereby improving installation efficiency. Furthermore, the limiting portion is configured as an external hexagonal structure to fit with an external hexagonal socket. In another embodiment, the outer peripheral surface of the waterproof cover 120 may also be configured as an external hexagonal shape to accommodate external hexagonal tools, such as external hexagonal sockets.

[0047] In one embodiment, a snap-fit ​​groove is provided on the end face of the waterproof cover 120 opposite to the batten strip 300. This snap-fit ​​groove can engage with the tool head of an auxiliary tool. By providing a snap-fit ​​groove on the end face of the waterproof cover 120 opposite to the batten strip 300, auxiliary tools, such as wrenches or screwdrivers, can be engaged within the snap-fit ​​groove to tighten the fastening structure 100, thereby improving installation efficiency. It is understood that the snap-fit ​​groove can be a straight groove, a cross groove, or a hexagonal groove.

[0048] In one embodiment, the fastening structure 100 further includes a sealing gasket disposed at the bottom of the waterproof cavity 121. By providing a sealing gasket at the bottom of the waterproof cavity 121, the sealing gasket is pressed against the boss 210 and the waterproof cover 120, thereby further improving the waterproof performance between the fastening structure 100 and the photovoltaic tile 200. Specifically, the sealing gasket is a rubber gasket, which can be snapped onto the bottom of the waterproof cavity 121 or adhered to the bottom of the waterproof cavity 121.

[0049] In one embodiment, the fastening structure 100 further includes a waterproof layer coated on the surfaces of the waterproof cover 120 and the fastener 110. By providing a waterproof layer on the surfaces of the waterproof cover 120 and the fastener 110, the waterproof performance of the fastening structure 100 is further improved. Specifically, the waterproof layer can be a polyurethane layer or a waterproof asphalt layer.

[0050] This utility model also provides a photovoltaic roof, which includes the fastening structure 100 as described above. The fastening structure 100 is applied to the photovoltaic roof, and fasteners 110 are used to connect the photovoltaic tiles 200 and the batten strips 300. Specifically, the connection between the photovoltaic tiles 200 and the batten strips 300 is achieved by connecting the fasteners 110 through connecting holes on the photovoltaic tiles 200. A waterproof cover 120 is connected to the fasteners 110, and the waterproof cover 120 protrudes from the fasteners 110 in the radial direction, so as to provide a waterproof cavity 121 on the waterproof cover 120. Furthermore, the radial dimension of the waterproof cover 120 is set to be larger than the radial dimension of the fasteners 110 to increase the contact area between the waterproof cover 120 and the photovoltaic tiles 200, thereby improving the connection strength and also improving the waterproof performance. By providing a waterproof cavity 121 on the waterproof cover 120, and adapting the waterproof cavity 121 to the protrusion 210 on the photovoltaic tile 200, and since the protrusion 210 on the photovoltaic tile 200 is higher than the surface of the photovoltaic tile 200, the opening of the connection hole is at a certain distance from the surface of the photovoltaic tile 200, making it difficult for rainwater to enter the connection hole. Furthermore, the waterproof cover 120 on the protrusion 210 provides rain protection, preventing rainwater from leaking through the connection hole. This structure not only achieves a fixed connection between the photovoltaic tile 200 and the batten strip 300, but also improves the waterproof performance of the photovoltaic roof.

[0051] Combination Figures 1 to 6 Please understand that the fastening structure 100 provided by this utility model is used in the following way:

[0052] The fastening structure 100 passes through the connection hole on the photovoltaic tile 200. A boss 210 is provided at the corresponding position of the connection hole in the photovoltaic tile 200. A waterproof cover 120 is placed on the boss 210, which protrudes from the surface of the photovoltaic tile 200 and is covered by the waterproof cover 120, thus providing waterproofing and preventing leakage at the tile fixing point. The waterproof cover 120 increases the contact area with the photovoltaic tile 200, significantly improving the fixing effect compared to existing technologies. The inner wall of the waterproof cavity 121 is made into a conical surface, and the circumference of the boss 210 conforms to this shape, providing self-centering during use and facilitating construction. Simultaneously, the gradually changing size of the waterproof cover 120 helps improve the structural strength of the screw, extending its service life. Furthermore, using the fastener 110 in the form of a screw, and designing the top of the waterproof cover 120 with an internal or external hexagonal structure, facilitates the standardization of the fastening structure 100. Compared to existing technologies, this reduces the design workload of roof photovoltaic systems and facilitates the promotion of roof photovoltaic system technology.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fastening structure applied in a photovoltaic roof, the photovoltaic roof comprising photovoltaic tiles; characterized in that, The fastening structure includes: Fasteners, which are configured as rotating bodies, are used to connect to the roof strips by passing through connection holes on the photovoltaic tiles; A waterproof cap, the waterproof cap being attached to one end of the fastener, and the waterproof cap protruding from the fastener in the radial direction of the fastener; The waterproof cover is provided with a waterproof cavity, which is adapted to the protrusion on the photovoltaic tile.

2. The fastening structure according to claim 1, characterized in that, The fastener and the waterproof cover are an integral structure.

3. The fastening structure according to claim 2, characterized in that, The boss is a rotating structure, and the waterproof cavity is a rotating cavity.

4. The fastening structure according to claim 3, characterized in that, The sidewall of the waterproof cavity is a conical surface, and the distance between the sidewall of the waterproof cavity and the fastener gradually decreases from the end facing the batten to the end away from the batten.

5. The fastening structure according to claim 1, characterized in that, The waterproof cover has an outwardly protruding limiting part at the end opposite to the tile strip, and the limiting part includes at least a pair of parallel side surfaces.

6. The fastening structure according to claim 1, characterized in that, The waterproof cover has a snap-fit ​​groove on the end face away from the batten strip, which can engage with the tool head of the auxiliary tool.

7. The fastening structure according to claim 1, characterized in that, The fastener has an external thread on its outer circumferential surface, and the end of the fastener away from the waterproof cover is constructed as a cone.

8. The fastening structure according to claim 1, characterized in that, The fastening structure also includes a sealing gasket, which is located at the bottom of the waterproof cavity.

9. The fastening structure according to claim 1, characterized in that, The fastening structure also includes: A waterproof layer is applied to the surface of the waterproof cover and the fastener.

10. A photovoltaic roof, characterized in that, The photovoltaic roof includes a fastening structure as described in any one of claims 1-9.

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