A fastening structure and support system for a photovoltaic racking

Abstract

The application relates to a fastening structure and a support system of a photovoltaic support, and the fastening structure comprises a first connecting piece, a second connecting piece, a first limiting ring and a second limiting ring; the first connecting piece and the second connecting piece are butted and installed to fix purlins and support main beams of the photovoltaic support; the first limiting ring is integrally connected on the first connecting piece, and the first limiting ring is used for limiting the passing of an upper cable arranged above the purlins; the second limiting ring is integrally connected on the second connecting piece, and the second limiting ring is used for limiting the passing of a lower cable arranged below the support main beam. The fastening structure of the application integrates the first limiting ring and the first connecting piece, integrates the second limiting ring and the second connecting piece, provides a support point through the limiting ring, effectively limits the displacement and height of the cable, realizes the effective support of the cable constraint force, and the fastening structure is more convenient to install, and the problem of single function of a traditional fastener is solved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic bracket technology, and in particular to a fastening structure and support system for a photovoltaic bracket. Background Technology

[0002] Please refer to Figure 1 As shown, in photovoltaic (PV) mounting applications, purlins 11 are typically used to support both ends of the PV module 1 along its long side. The main beam 12 of the mounting system and the purlins 11 are arranged perpendicularly to each other, and the bottom of the main beam 12 and the purlins 11 are connected by traditional fasteners such as bolts. However, the existing purlins 11 are generally short in design, much shorter than the overall length of the PV module 1. This results in a considerable portion of the PV module 1 being in a cantilevered state, directly leading to poor wind and snow load resistance in the cantilevered portion. Furthermore, the traditional bolt connection method easily causes stress concentration at the connection point, making the PV module 1 prone to fatigue failure under long-term external loads (such as wind and snow).

[0003] Therefore, please refer to Figure 2 As shown, existing technology improves structural performance by installing an upper cable 13 above the purlin 11 and a lower cable 14 below the main beam 12 of the support frame. The two ends of the upper cable 13 and the lower cable 14 are respectively connected to the cantilever ends of the photovoltaic module 1. Simultaneously, a first structural member 15 is installed on the purlin 11 to fix the position and height of the upper cable 13; similarly, a second structural member 16 is installed below the main beam 12 of the support frame to fix the position and height of the lower cable 14. While this method can improve the wind resistance and stability of the entire photovoltaic module, it uses a large number of components, including traditional bolts, the first structural member 15, and the second structural member 16. These components are usually installed and used independently, and the traditional bolts only serve the single function of connecting the main beam 12 of the support frame and the purlin 11.

[0004] Therefore, it is necessary to design a fastening structure and support system for photovoltaic brackets to solve the technical problems mentioned above. Utility Model Content

[0005] This application provides a fastening structure and support system for photovoltaic brackets. This fastening structure is not only easy to install, but also solves the problem of the single function of traditional fasteners.

[0006] A first aspect of this application provides a fastening structure for a photovoltaic (PV) bracket, comprising: a first connector, a second connector, a first limiting ring, and a second limiting ring; the first connector and the second connector are mated together to fix the purlins and the main beam of the PV bracket; at least one first limiting ring is integrated onto the first connector, the first limiting ring being used for limiting the passage of an upper pull cable disposed above the purlins; at least one second limiting ring is integrated onto the second connector, the second limiting ring being used for limiting the passage of a lower pull cable disposed below the main beam of the bracket.

[0007] A preferred embodiment is that the first connector is a T-shaped connector, with its horizontal section positioned on the purlin; the second connector is a U-shaped connector; both sides of the second connector pass through the main beam of the support, placing the main beam in the middle of the second connector; both ends of the second connector pass through the purlin and connect to the horizontal section of the first connector; the first limiting ring is connected to the vertical section of the first connector; and the second limiting ring is connected to the end of the second connector opposite to its opening.

[0008] A preferred embodiment is that the first connector and the second connector are detachably connected.

[0009] A preferred embodiment is that the first connector and the second connector are detachably connected by a fastening assembly, the fastening assembly including a fastening nut and a washer; the washer is disposed on the upper surface of the horizontal section of the first connector and sleeved on the end of the second connector; the fastening nut is threaded onto the second connector and presses the washer.

[0010] A preferred embodiment is that the first connector is a T-shaped gasket, and a pad is provided between the horizontal section of the first connector and the purlin; the second connector is a U-shaped connector, with both sides of the second connector passing through the main beam of the support so that the main beam of the support is placed in the middle of the second connector, and the two ends of the second connector passing through the purlin and the pad and then connecting to the horizontal section of the first connector; the first limiting ring is connected to the vertical section of the first connector; and the second limiting ring is connected to the end of the second connector opposite to its opening.

[0011] A preferred embodiment is that the first connector and the second connector are detachably connected.

[0012] A preferred embodiment is that the first connector and the second connector are detachably connected by a fastening assembly, the fastening assembly including a fastening nut; the fastening nut is threaded onto the second connector and presses against the horizontal section of the first connector.

[0013] A preferred embodiment is that the vertical section of the first connector is configured as a U-shaped structure; when both the first limiting ring and the second limiting ring are configured as one, the bottom edge of the first limiting ring is connected to the inner walls on both sides of the opening of the vertical section, and the first limiting ring is used for limiting the upper pull cable at the edge of the photovoltaic module; the second limiting ring is used for limiting the lower pull cable at the edge of the photovoltaic module; or, when both the first limiting ring and the second limiting ring are configured as two, the first limiting ring is connected to both ends of the opening of the vertical section, and the two first limiting rings are used for limiting the upper pull cable between two adjacent photovoltaic modules respectively; the two second limiting rings are connected side by side along a direction parallel to the main beam of the support, and the two second limiting rings are used for limiting the lower pull cable between two adjacent photovoltaic modules respectively.

[0014] A second aspect of this application provides a support system including a fastening structure for the photovoltaic bracket.

[0015] A preferred embodiment is that the support system further includes: photovoltaic modules, a main support beam, purlins, upper cables, and lower cables; the purlins are configured in a U-shape with their openings facing upwards, and the two sides of the purlin openings are respectively connected to two adjacent photovoltaic modules; the bottom surface of the purlins is connected and fixed to the main support beam via the fastening structure; the two ends of the upper and lower cables are respectively connected to the cantilever ends of the photovoltaic modules; the first limiting ring of the fastening structure is used for limiting the insertion of the upper cable; the second limiting ring of the fastening structure is used for limiting the insertion of the lower cable.

[0016] Beneficial effects: First, traditional fasteners only serve to connect the main beam and purlins of the support structure, offering a relatively simple function. In this application, the first and second connecting parts are installed together to fix the purlins and main beam of the photovoltaic support, essentially fulfilling the function of traditional fasteners. By integrating the first limiting ring and the first connecting part, and the second limiting ring and the second connecting part, the function of this fastening structure is diversified. It not only fastens the purlins and the main beam of the support structure, but also limits the middle position of the upper cable through the first limiting ring and the middle position of the lower cable through the second limiting ring. Therefore, using only one set of this fastening structure, the functions of traditional fasteners can be achieved simultaneously, providing support points for the cables to limit their displacement and height, thus effectively supporting the cable constraint force. Therefore, the fastening structure provided in this application is not only easy to install, but also solves the problem of the single function of traditional fasteners.

[0017] Second: The support system consists of photovoltaic modules, purlins, main beams of the bracket, fastening structures, and at least one cable. By extending and increasing the support positions of the cable at the purlins at both ends of the photovoltaic modules, and by utilizing the material properties of the cable itself and the tension provided by the installation structure, the tension and traction between the cantilever end of the photovoltaic module and the main beam of the bracket are significantly improved, greatly enhancing the connection stability at both ends of the photovoltaic module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the connection between photovoltaic modules, purlins, and the main beam of the support structure in the existing technology. Figure 2 This is a schematic diagram illustrating the connection between cables and photovoltaic modules, purlins, and the main beam of the support structure in the existing technology. Figure 3 This is a front view of the fastening structure in Embodiment 1; Figure 4 This is a side view of the fastening structure in Embodiment 1. Figure 5 This is a top view of the fastening structure in Embodiment 1; Figure 6 This is a front view of the fastening structure in Embodiment 2; Figure 7 This is a side view of the fastening structure in Embodiment 2; Figure 8 This is a top view of the fastening structure in Embodiment 2; Figure 9 This is a front view of the fastening structure in Embodiment 3; Figure 10 This is a side view of the fastening structure in Embodiment 3; Figure 11 This is a top view of the fastening structure in Embodiment 3; Figure 12 This is a front view of the fastening structure in Embodiment 4; Figure 13 This is a side view of the fastening structure in Embodiment 4; Figure 14 This is a top view of the fastening structure in Embodiment 4.

[0019] Figure label: 1. Photovoltaic module; 11. Purlin; 12. Main beam of support frame; 13. Upper cable; 14. Lower cable; 15. First structural component; 16. Second structural component; 2. First connector; 21. Horizontal section; 22. Vertical section; 3. Second connector; 4. First limiting ring; 5. Second limiting ring; 6. Fastening component; 61. Fastening nut; 62. Washer; 7. Pad. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] Please refer to Figure 1 and Figure 2 As shown, the photovoltaic support structure supports the photovoltaic module 1. The support structure includes purlins 11, cables, and a main beam 12. The purlins 11 are fixed to the bottom surface of the photovoltaic module 1, and their core function is to directly support the photovoltaic module 1 above. This installation method not only effectively distributes the various forces borne by the photovoltaic module 1 to the lower support structure, but also improves the structural strength and stability of the entire support system. In the support system for the photovoltaic module 1, the purlins 11 are typically short, mainly for cost control, as using longer purlins 11 would increase costs. Therefore, shorter purlins 11 are preferred in this project, and two purlins 11 are arranged, placed on the two long sides of the photovoltaic module 1 respectively, to achieve the supporting function. The main beam 12 is connected to the bottom of the purlins 11 using traditional fasteners such as U-bolts, and the main beam 12 and purlins 11 are set perpendicular to each other. The cable is divided into an upper cable 13 and a lower cable 14. The two ends of the upper cable 13 are connected to the two sides of the photovoltaic module 1, and the middle part is supported and fixed upward by the first structural member 15 set above the purlin 11, thus forming a support point higher than the connection points at both ends, so that the upper cable 13 has a raised shape in the middle. The two ends of the lower cable 14 are connected to the two sides of the photovoltaic module 1, and the middle part is pulled downward and fixed by the second structural member 16 set on the lower surface of the main beam 12 of the support, thus forming a support point lower than the upper cable 13. The upper cable 13 and the lower cable 14 together form a stable support structure and realize the constraint on the cantilever end of the photovoltaic module 1. By installing an upper cable 13 above the purlin 11 of the photovoltaic module 1, the constraint force on the cantilever end of the photovoltaic module 1 when subjected to positive pressure load can be increased, thereby enhancing the stability of the entire support system. A lower cable 14 is installed below the main beam 12 of the support system, mainly to increase the constraint force on the cantilever end of the photovoltaic module 1 when subjected to negative pressure load, thereby improving the overall ability of the support system to resist negative pressure load and structural safety.

[0022] In the aforementioned prior art, the U-bolts that fix the main beam 12 of the support and the purlin 11, the first structural member 15 set on the purlin 11, and the second structural member 16 set below the main beam 12 of the support are all used independently, with many parts, and the U-bolts only serve to connect the main beam 12 of the support and the purlin 11, with a relatively simple function.

[0023] Based on the above, this application provides a fastening structure for a photovoltaic support. The second limiting ring 5 functions similarly to the second structural component 16 in the prior art, primarily providing a support point for the lower cable 14. The second limiting ring 5 is integrated into the second connecting component 3, thereby enhancing the functionality of the second connecting component 3. This allows it to not only serve as a component for fixing the main beam 12 and purlin 11 of the support, but also to simultaneously connect to the second limiting ring 5. The first limiting ring 4 functions similarly to the first structural component 15 in the prior art, primarily providing a support point for the upper cable 13. The first limiting ring 4 is integrated into the first connecting component 2, thereby enhancing the functionality of the first connecting component 2. This allows it to both connect to the second connecting component 3 and connect to the first limiting ring 4. This fastening structure achieves diverse functions, and because both the first limiting ring 4 and the second limiting ring 5 are integrated, they do not need to be directly fixed to the main beam 12 or purlin 11, avoiding secondary damage to the main beam 12 or purlin 11. It also facilitates installation and disassembly operations.

[0024] Example 1 This embodiment provides a fastening structure for a photovoltaic bracket, which will be described in detail below. Please refer to... Figures 3-5 As shown, the system includes a first connector 2, a second connector 3, a first limiting ring 4, and a second limiting ring 5. The first connector 2 and the second connector 3 are mated together to fix the purlin 11 and the main beam 12 of the photovoltaic support. At least one first limiting ring 4 is integrated into the first connector 2, and the first limiting ring 4 is used for limiting the passage of the upper pull cable 13 located above the purlin 11. At least one second limiting ring 5 is integrated into the second connector 3, and the second limiting ring 5 is used for limiting the passage of the lower pull cable 14 located below the main beam 12.

[0025] In this embodiment, the first connector 2 and the second connector 3 are installed by mating to fix the purlin 11 and the main beam 12 of the photovoltaic support, which is equivalent to the function of a traditional fastener. By integrating the first limiting ring 4 and the first connector 2, and integrating the second limiting ring 5 and the second connector 3, the function of this fastening structure is diversified. It can not only fasten the purlin 11 and the main beam 12 of the support, but also limit the middle position of the upper cable 13 through the first limiting ring 4, and limit the middle position of the lower cable 14 through the second limiting ring 5. Therefore, using only one set of this fastening structure, it can simultaneously achieve the function of a traditional fastener and provide support points for the cables to limit the displacement and height of the cables, thereby achieving the constraint and support function of the cables. This overall structure is easy to install and effectively solves the problem of the single function of traditional fasteners, and is especially suitable for the installation of photovoltaic support systems in harsh outdoor environments. It should be noted that the heights of the first limiting ring 4 and the second limiting ring 5 can be designed and matched according to the size of the photovoltaic module 1 and the required traction force, and can also be matched to the specifications according to the actual size of the cable. The shape of the main beam 12 of the support is not specified, but the cross-section can be a closed structure such as a rectangle, circle, ellipse, or hexagon.

[0026] Please continue to refer to Figures 3-5As shown, in some embodiments, the first connector 2 is a T-shaped connector, having an integrally connected horizontal section 21 and vertical section 22. In use, the horizontal section 21 of the first connector 2 is positioned on the purlin 11. The second connector 3 is a U-shaped connector. The shape of the U-shaped connector is not specified; it can be semi-circular, square, right-angled, triangular, oblique triangular, etc. In this embodiment, only a semi-circular shape is used as an example. In use, the two sides of the second connector 3 pass through the main beam 12 of the support, placing the main beam 12 in the middle of the second connector 3. The two ends of the second connector 3 pass through the purlin 11 and the horizontal section 21 of the first connector 2 and are connected by the fastening assembly 6. Thus, in this embodiment, the purlin 11 and the main beam 12 of the support are fixed through the connection between the first connector 2 and the second connector 3. The first limiting ring 4 is integrated into the vertical section 22 of the first connector 2, and the second limiting ring 5 is integrated into the end of the second connector 3 opposite to its opening. Therefore, the upper cable 13 can be fitted with a first limiting ring 4, which provides a support point for the upper cable 13, thereby limiting its displacement and height. Furthermore, during the design phase, the fixed height of the first limiting ring 4 relative to the middle position of the upper cable 13 can be changed by altering the height of the vertical section 22 of the first connecting member 2. The lower cable 14 can be fitted with a second limiting ring 5, which provides a support point for the lower cable 14, thereby limiting its displacement and height. It should be noted that the first limiting ring 4 and the first connecting member 2, as well as the second limiting ring 5 and the second connecting member 3, can be connected by welding or other methods to achieve a fixed connection.

[0027] In some embodiments, the first connector 2 and the second connector 3 are detachably connected by a fastening assembly 6, wherein the fastening assembly 6 includes a fastening nut 61 and a washer 62. The washer 62 is disposed on the upper surface of the horizontal section 21 of the first connector 2 and is respectively sleeved on both ends of the second connector 3. The fastening nut 61 is threaded onto the second connector 3 and presses against the washer 62. It should be noted that the connection between the first connector 2 and the second connector 3 is achieved through the fastening nut 61 and the washer 62, thereby fixing the purlins 11 and the main beam 12 of the photovoltaic support. This fastening connection provides a stable foundation for structural components such as external cables, thereby enhancing the constraint force on the cantilever end of the photovoltaic module.

[0028] Please continue to refer to Figures 3-5As shown, in some embodiments, the vertical section 22 of the first connector 2 is configured as a U-shaped structure. When the first limiting ring 4 is configured as one, the bottom edge of the first limiting ring 4 is connected to the inner walls on both sides of the opening of the vertical section 22. The first limiting ring 4 is used for the upper pull cable 13 at the edge of the photovoltaic module 1 to pass through and limit the movement. When the second limiting ring 5 is configured as one, the second limiting ring 5 is used for the lower pull cable 14 at the edge of the photovoltaic module 1 to pass through and limit the movement.

[0029] Example 2 Please refer to Figures 6-8 As shown, the vertical section 22 of the first connector 2 is configured as a U-shaped structure. When two first limiting rings 4 are configured, the first limiting rings 4 are respectively connected to the two ends of the opening of the vertical section 22. The two first limiting rings 4 are respectively used for limiting the passage of two upper pull cables 13 set above the same purlin 11 in two adjacent photovoltaic modules 1. When two second limiting rings 5 ​​are configured, the two second limiting rings 5 ​​are connected side by side along the direction parallel to the main beam 12 of the support. The two second limiting rings 5 ​​are respectively used for limiting the passage of lower pull cables 14 set below the main beam 12 of the support in two adjacent photovoltaic modules 1. Of course, in this embodiment, the vertical section 22 of the first connector 2 is not limited to a U-shaped structure.

[0030] In a specific application scenario, such as Figure 1 As shown, multiple photovoltaic modules 1 are arranged along the x-direction, and the purlins 11 are arranged in a U-shape. The long sides of two adjacent photovoltaic modules 1 overlap the two sides of the same purlin 11, with the middle area serving as the operating space for connecting the main beam 12 of the bottom support. When the fastening structure in this application uses two first limiting rings 4 and two second limiting rings 5 ​​arranged vertically, this fastening structure can be applied between two adjacent photovoltaic modules 1. The corresponding upper cables 13 are respectively inserted into the two first limiting rings 4 for limiting, and the corresponding lower cables 14 are respectively inserted into the two second limiting rings 5 ​​for limiting. This structural design is suitable for the installation between two adjacent photovoltaic modules 1, and can achieve the effect of simultaneously reinforcing two photovoltaic modules 1 with one fastening structure and related components. By extending the support length of the cables at the purlins 11 at both ends of the photovoltaic module 1, and utilizing the material properties of the cables and the tension provided by the installation structure, the fastening and traction force between the cantilever end of the photovoltaic module 1 and the support is significantly enhanced, thereby greatly improving the stability and reliability of the overall system. When the fastening structure in this application uses a first limiting ring 4 and a second limiting ring 5 arranged vertically, since the photovoltaic modules 1 at both ends only have upper pull cables 13 and lower pull cables 14 on their outer sides, this fastening structure can be applied to the photovoltaic modules 1 at both ends. Therefore, the upper pull cable 13 is inserted into the first limiting ring 4 for limiting, and the lower pull cable 14 is inserted into the second limiting ring 5 for limiting. In summary, different fastening structures can be selected according to the actual application scenario.

[0031] Example 3 Please refer to Figures 9-11 As shown, the first connector 2 is a T-shaped gasket, and has an integrally connected horizontal section 21 and vertical section 22. In use, a gasket 7 is placed between the horizontal section 21 of the first connector 2 and the purlin 11. The second connector 3 is a U-shaped connector. In use, the two sides of the second connector 3 pass through the main beam 12 of the support, so that the main beam 12 of the support is placed in the middle of the second connector 3. The two ends of the second connector 3 are connected by the fastening assembly 6 after passing through the purlin 11, the gasket 7 and the horizontal section 21 of the first connector 2. The first limiting ring 4 is integrated into the vertical section 22 of the first connector 2, and the second limiting ring 5 is integrated into the end of the second connector 3 opposite to its opening.

[0032] In some embodiments, the fastening assembly 6 includes a fastening nut 61, which is threaded onto the second connector 3 and presses against the horizontal section 21 of the first connector 2.

[0033] Please continue to refer to Figures 9-11 As shown, in some embodiments, the vertical section 22 of the first connector 2 is configured as a U-shaped structure. When the first limiting ring 4 is configured as one, the bottom edge of the first limiting ring 4 is connected to the inner walls on both sides of the opening of the vertical section 22. The first limiting ring 4 is used for the upper pull cable 13 at the edge of the photovoltaic module 1 to pass through and limit the movement. When the second limiting ring 5 is configured as one, the second limiting ring 5 is used for the lower pull cable 14 at the edge of the photovoltaic module 1 to pass through and limit the movement.

[0034] Example 4 Please refer to Figures 12-14 As shown, the vertical section 22 of the first connector 2 is configured as a U-shaped structure. When there are two first limiting rings 4, the first limiting rings 4 are respectively connected to the two ends of the opening of the vertical section 22. The two first limiting rings 4 are respectively used for the two upper pull cables 13 set above the same purlin 11 in two adjacent photovoltaic modules 1 to pass through and limit their movement. When there are two second limiting rings 5, the two second limiting rings 5 ​​are connected side by side along the direction parallel to the main beam 12 of the support. The two second limiting rings 5 ​​are respectively used for the lower pull cables 14 set below the main beam 12 of the support in two adjacent photovoltaic modules 1 to pass through and limit their movement.

[0035] It should be noted that the differences between Embodiments 3 and 4 and Embodiments 1 and 2 are as follows: First, Embodiments 3 and 4 use a T-shaped gasket for the first connector 2, which serves as both a gasket and a connector for the first limiting ring 4, thus eliminating the need for the gasket 62 in Embodiments 1 and 2. This change not only reduces the number of components but also enhances the necessary system structural support and protection, improving the stability and efficiency of the fixed connection. Second, Embodiments 3 and 4 add a pad 7 and adjust the top-to-bottom installation sequence: fastening nut 61, first connector 2, pad 7, ultimately achieving the connection with the second connector 3. This sequential connection achieves an effective connection between the first connector 2 and the second connector 3. This structural adjustment helps enhance the overall structural stability and optimizes load distribution. The installation methods for other components are the same as in Embodiments 1 and 2. It should be noted that through the above structural optimization, this fastening structure has greater flexibility in adapting to various working conditions and usage scenarios, and can better meet the installation needs of different types of photovoltaic brackets.

[0036] Example 5 Example 5 provides a support system, including a fastening structure for a photovoltaic bracket as described in any of the above embodiments, a photovoltaic module 1, a main beam 12 of the bracket, purlins 11, an upper cable 13, and a lower cable 14. The purlins 11 are arranged in a U-shape with their openings facing upwards. The two sides of the opening of the purlin 11 are respectively connected to two adjacent photovoltaic modules 1. The bottom surface of the purlin 11 is connected and fixed to the main beam 12 of the bracket through the fastening structure. The two ends of the upper cable 13 and the lower cable 14 are respectively connected to the cantilever ends of the photovoltaic modules 1. The first limiting ring 4 of the fastening structure is used for limiting the insertion of the upper cable 13. The middle position of the upper cable 13 is lifted and fixed upwards by the first limiting ring 4 located above the purlin 11, thereby forming a support point higher than the connection points at both ends, so that the upper cable 13 has a raised shape in the middle. The second limiting ring 5 of the fastening structure is used for the lower cable 14 to pass through and limit the movement. The middle position of the lower cable 14 is pulled downward and fixed by the second limiting ring 5 set on the lower surface of the main beam 12 of the support, thereby forming a support point lower than the upper cable 13. This allows the upper cable 13 and the lower cable 14 to form a stable support structure and achieve constraint on the cantilever end of the photovoltaic module 1.

[0037] 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.

[0038] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fastening structure for a photovoltaic support, characterized in that, include: First connector (2), second connector (3), first limiting ring (4) and second limiting ring (5); The first connector (2) and the second connector (3) are connected and installed to fix the purlin (11) and the main beam (12) of the photovoltaic bracket; At least one of the first limiting rings (4) is integrated and connected to the first connector (2), and the first limiting rings (4) are used for limiting the passage of the upper cable (13) provided above the purlin (11); At least one second limiting ring (5) is integrated on the second connector (3), and the second limiting ring (5) is used for limiting the insertion of the pull cable (14) provided from below the main beam (12) of the support.

2. The fastening structure according to claim 1, characterized in that, The first connector (2) is a T-shaped connector, and the horizontal section (21) of the first connector (2) is disposed on the purlin (11); The second connector (3) is a U-shaped connector. The two sides of the second connector (3) pass through the main beam (12) of the support so that the main beam (12) of the support is placed in the middle of the second connector (3). The two ends of the second connector (3) are connected to the horizontal section (21) of the first connector (2) after passing through the purlin (11). The first limiting ring (4) is connected to the vertical section (22) of the first connecting member (2); The second limiting ring (5) is connected to the end of the second connector (3) away from its opening.

3. The fastening structure according to claim 2, characterized in that, The first connector (2) and the second connector (3) are detachably connected.

4. The fastening structure according to claim 3, characterized in that, The first connector (2) and the second connector (3) are detachably connected by a fastening assembly (6), which includes a fastening nut (61) and a washer (62). The gasket (62) is disposed on the upper surface of the horizontal section (21) of the first connector (2) and sleeved on the end of the second connector (3); The fastening nut (61) is threaded onto the second connector (3) and presses against the washer (62).

5. The fastening structure according to claim 1, characterized in that, The first connector (2) is a T-shaped gasket, and a pad (7) is provided between the horizontal section (21) of the first connector (2) and the purlin (11); The second connector (3) is a U-shaped connector. The two sides of the second connector (3) pass through the main beam (12) of the support so that the main beam (12) of the support is placed in the middle of the second connector (3). The two ends of the second connector (3) are connected to the horizontal section (21) of the first connector (2) after passing through the purlin (11) and the pad (7). The first limiting ring (4) is connected to the vertical section (22) of the first connecting member (2); The second limiting ring (5) is connected to the end of the second connector (3) away from its opening.

6. The fastening structure according to claim 5, characterized in that, The first connector (2) and the second connector (3) are detachably connected.

7. The fastening structure according to claim 6, characterized in that, The first connector (2) and the second connector (3) are detachably connected by a fastening assembly (6), which includes a fastening nut (61). The fastening nut (61) is threaded onto the second connector (3) and presses against the horizontal section (21) of the first connector (2).

8. The fastening structure according to any one of claims 2-7, characterized in that, The vertical section (22) of the first connector (2) is configured as a U-shaped structure; When both the first limiting ring (4) and the second limiting ring (5) are set to one, the bottom edge of the first limiting ring (4) is connected to the inner walls on both sides of the opening of the vertical section (22). The first limiting ring (4) is used for the upper pull cable (13) at the edge of the photovoltaic module (1) to pass through and limit the movement; the second limiting ring (5) is used for the lower pull cable (14) at the edge of the photovoltaic module (1) to pass through and limit the movement. or, When both the first limiting ring (4) and the second limiting ring (5) are set to two, the first limiting ring (4) is connected to both ends of the opening of the vertical section (22), and the two first limiting rings (4) are used for the upper cable (13) between two adjacent photovoltaic modules (1) to be limited; the two second limiting rings (5) are connected side by side along the direction parallel to the main beam (12) of the support, and the two second limiting rings (5) are used for the lower cable (14) between two adjacent photovoltaic modules (1) to be limited.

9. A support system, characterized in that, Including the fastening structure of the photovoltaic bracket as described in any one of claims 1-8.

10. The support system according to claim 9, characterized in that, The support system also includes: photovoltaic modules (1), main beams (12), purlins (11), upper cables (13), and lower cables (14); The purlin (11) is set in a Z-shape, and the opening of the purlin (11) faces upward. The two sides of the opening of the purlin (11) are respectively connected to the two adjacent photovoltaic modules (1). The bottom surface of the purlin (11) is connected and fixed to the main beam (12) of the support through the fastening structure. The two ends of the upper cable (13) and the lower cable (14) are respectively connected to the cantilever end of the photovoltaic module (1); The first limiting ring (4) of the fastening structure is used for the upper cable (13) to pass through and be limited; The second limiting ring (5) of the fastening structure is used for the lower cable (14) to be threaded and limited.

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