Photovoltaic module fixing structure and installation method

Abstract

The invention discloses a photovoltaic module fixing structure and an installation method thereof, and aims to solve the defects of a fixing mode of a photovoltaic module and a purline in the prior art. The structure comprises a left purline, a middle purline and a right purline, and the cross section of each purline is provided with a notch matched with the thickness of the photovoltaic module, so that the module can be quickly inserted and fixed without additional pressing block or bolt connection. The installation method comprises the step of respectively inserting two sides of the photovoltaic module into the corresponding notches. The notch matched with the thickness of the photovoltaic module is directly formed in the cross section of the purline, the steel consumption and the overall cost are reduced, the installation precision and the construction convenience are improved, and the wind resistance and deformation resistance of the system are enhanced. Compared with a traditional mode that holes need to be formed in the purline and alignment installation needs to be conducted, the structure adopts a preset notch shape, the assembly can be directly inserted into an accurate position in the direction of the purline, tedious alignment adjustment is not needed, and the stress concentration risk of the contact face of the photovoltaic assembly and the purline is remarkably reduced.

Description

Technical Field

[0001] The invention relates to a photovoltaic component fixing structure and an installation method, belonging to the technical field of photovoltaic brackets. Background Art

[0002] In the construction of photovoltaic power plants, the support and installation of photovoltaic modules are critical to ensuring stable and efficient system operation. Currently, there are two main methods for securing photovoltaic modules to the support purlins: one is to secure the photovoltaic modules to the purlins using clamps; the other is to pre-drill holes in the purlins or drill holes during installation, aligning the module mounting holes with the holes in the purlins before bolting.

[0003] However, both of these approaches have certain drawbacks in practical application. First, while the clamping method allows for rapid assembly and disassembly of modules, the complex clamping structure required on the purlins increases steel usage, further increasing overall costs. Second, for solutions requiring holes in the purlins, the thickness of the purlin steel plates is decreasing as market demand for material conservation and cost reduction continues to increase. Consequently, when bolts are used to secure the PV modules directly through the purlin holes, the effective contact surface between the bolts and the purlins is small, which can easily cause the purlins to tear or deform under strong wind loads or other adverse environmental conditions. Furthermore, due to factors such as machining accuracy, the installation process, and the deformation of the modules and purlins themselves, perfect alignment between the PV modules and the mounting holes in the purlins is often difficult to achieve. This not only increases the difficulty and labor costs of installation and commissioning, but also sometimes requires temporary re-drilling of the holes at the construction site, further increasing the complexity and uncertainty of the construction process.

[0004] Overall, the existing fixing schemes for photovoltaic modules and purlins still have much room for improvement in terms of structural materials, installation alignment accuracy and construction convenience. There is an urgent need for an innovative fixing structure or installation method that can reduce steel usage, improve installation accuracy and simplify the construction process. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a photovoltaic module fixing structure and an installation method to overcome the deficiencies of the prior art.

[0006] The technical solution of the present invention is: a photovoltaic module fixing structure, the structure comprising a left purlin, a middle purlin and a right purlin; The left purlin, the middle purlin and the right purlin are long strips, and the left purlin and the right purlin are symmetrically arranged with the center line of the middle purlin as the center line; A cross section of the left purlin taken along a plane perpendicular to the length of the left purlin comprises a rectangular bottom member, the upper edge of the bottom member being adjacent to a vertically extending first support portion; the first support portion extending vertically and connected to a horizontally extending cross member at its top end, such that the cross member extends laterally from directly above the bottom member in a cantilevered manner; the first support portion, the cross member, and the bottom member enclose a first notch, the notch width of which matches the thickness of the photovoltaic module; A cross section of the center purlin taken along a plane perpendicular to the length of the center purlin comprises an upper horizontal member, a second support portion extending vertically from below the upper horizontal member, and a lower main structure connected to the lower end of the second support portion. The lower main structure is rectangular and integrally connected to the upper horizontal member in the vertical direction via the second support portion. The upper horizontal member, the second support portion, and the lower main structure define a second notch and a third notch on the left and right sides. The width of the second notch and the third notch match the thickness of the photovoltaic module. The second notch is aligned with the upper and lower side walls of the first notch of the left purlin, the third notch is aligned with the upper and lower side walls of the first notch of the right purlin, the distance between the bottom surface of the first notch of the left purlin and the bottom surface of the second notch matches the width of the photovoltaic module, and the distance between the bottom surface of the first notch of the right purlin and the bottom surface of the third notch matches the width of the photovoltaic module.

[0007] Furthermore, the second notch and the third notch are bilaterally symmetrical to each other.

[0008] A method for installing a photovoltaic module fixing structure, wherein the two sides of a first group of photovoltaic modules are respectively inserted into the first notch of a left purlin and the second notch of a middle purlin, and the two sides of a second group of photovoltaic modules are respectively inserted into the first notch of a right purlin and the third notch of a middle purlin to achieve installation and fixing of the photovoltaic modules.

[0009] The beneficial effects of the present invention are: compared with the prior art, 1) The present invention achieves rapid plug-in and fixation of the modules by directly forming notches on the cross-section of the purlins that match the thickness of the modules, eliminating the need for complex pressing blocks, thereby reducing steel consumption and overall costs. 2) This invention directly forms notches in the purlin cross-section that match the thickness of the photovoltaic module, allowing the module to be embedded within. Compared to existing cross-sections with independent components and large openings, this invention forms a relatively "integrated" cross-section of the module, purlin, and notch structure. This integrated construction not only reduces the assembly gap between the module and purlin, but also more evenly distributes external forces on the inner walls of the notch around the cross-section when subjected to stress. The rigidity of the module itself also improves the torsional resistance of the purlin, thereby increasing the rigidity of the entire cross-section and enhancing torsional resistance. 3) Compared to traditional methods that require drilling holes in the purlins and aligning the installation, this invention utilizes a pre-defined notch structure, allowing components to be inserted directly into precise positions along the purlins without the need for tedious alignment adjustments. This not only reduces alignment difficulties caused by machining errors and component deformation, but also improves the overall installation accuracy of the system. 4) By eliminating the need for secondary drilling of purlins on site and frequent alignment adjustments, the present invention's fixing structure significantly simplifies on-site installation. Installers simply insert the edges of the photovoltaic modules into the corresponding notches to secure and position them. This modular installation method helps accelerate the construction progress of large-scale photovoltaic power plants. 5) Traditional open-hole bolt connections often result in insufficient load-bearing surfaces due to thinning of the purlins, making them prone to tearing or deformation under adverse conditions such as wind loads. However, this invention creates notches in the purlin structure that match the thickness of the module. This creates sufficient surface contact support between the module frame and the inner wall of the notch, resulting in more uniform load distribution and significantly reducing the risk of stress concentration at the interface between the PV module and the purlin, thereby improving overall wind and deformation resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional view of the present invention; Figure 2 A top view of the present invention; Figure 3 for Figure 2 Section view at the mid-section line AA; Figure 4 for Figure 3 Partial view at point B in the middle; Figure 5 for Figure 3 Partial view at point C in the middle. DETAILED DESCRIPTION

[0011] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0012] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0013] For the convenience of description, the directional words such as end, up, down, left, right, front and back are used in the present invention. The definitions of these directional words in this patent are as follows: Figure 3 The left and right correspond to the left and right of the structure in the present invention, Figure 3 The upper and lower parts correspond to the upper and lower parts of the device in the present invention. Figure 2 After the upper corresponding device, Figure 2 The lower one in the middle corresponds to the front of the device.

[0014] Implementation Example 1: like Figure 1-5 As shown, this embodiment provides a photovoltaic module fixing structure, including a left purlin 1, a middle purlin 2 and a right purlin 3. The left purlin 1 and the right purlin 3 are symmetrically arranged along the center line of the middle purlin 2, and the overall structure is bilaterally symmetrical.

[0015] Ø Left purlin 1 structure The cross section of the left purlin 1 is as follows Figure 2 As shown, a notch design is used that matches the thickness of the photovoltaic module 4. Its cross section includes: Bottom member 1-1: It is a rectangular structure and serves as the base of the purlin with a thickness of T1.

[0016] The first supporting portion 1-2 extends vertically from the upper edge of the bottom member 1-1, with a length of L1 and a thickness of T2.

[0017] Transverse member 1-3: connected to the top end of the first support portion 1-2, extending horizontally to form a cantilever, with a length of L2 and a thickness of T3.

[0018] The first slot 1-4 is surrounded by the bottom member 1-1, the first support portion 1-2 and the transverse member 1-3. The slot width matches the thickness of the photovoltaic component 4 to ensure that the component can be firmly inserted.

[0019] Ø Middle purlin 2 structure The cross section of the middle purlin 2 is as follows Figure 3 As shown, the structure includes: The lower main structure 2-1 is rectangular and vertically connected to the upper horizontal member 2-3 through the second support part 2-2, with a thickness of T4.

[0020] The second support portion 2-2 extends vertically from the lower main structure 2-1, with a length of L3 and a thickness of T5.

[0021] Upper horizontal member 2-3: connected to the upper end of the second support portion 2-2, extending horizontally, with a length of L4 and a thickness of T6.

[0022] The second slot 2-4 and the third slot 2-5 are respectively surrounded by the upper horizontal member 2-3, the second support part 2-2 and the lower main structure 2-1. The width matches the thickness of the photovoltaic module 4. The second slot 2-4 is aligned with the first slot 1-4 of the left purlin 1, and the third slot 2-5 is aligned with the first slot 1-4 of the right purlin 3 to ensure the accurate positioning of the module.

[0023] Ø Right purlin 3 structure The structure of the right purlin 3 is basically the same as that of the left purlin 1 , and its cross section includes a bottom member, a first support portion, a transverse member and a first notch, ensuring a symmetrical installation structure with the left purlin 1 .

[0024] Implementation Example 2: Ø Photovoltaic panel 4 installation like Figure 1-5 As shown, the steps for installing the photovoltaic module 4 are as follows: Component insertion: Insert both sides of the first group of photovoltaic components 4 into the first notch 1-4 of the left purlin 1 and the second notch 2-4 of the middle purlin 2 respectively.

[0025] Fixing the module: Ensure that the edge of the photovoltaic module 4 is fully embedded in the slots 1-4 and slots 2-4. The shape of the slots allows for a secure fixation without the need for additional clamps or bolt connections.

[0026] Repeat the installation: insert both sides of the second set of photovoltaic modules 4 into the first notch of the right purlin 3 and the third notch 2-5 of the middle purlin 2 respectively to complete the fixation of the entire module.

[0027] Through the above installation steps, the photovoltaic components 4 can be quickly and accurately fixed on the left purlin 1, the right purlin 3 and the purlin 2, ensuring the stability of the system and the installation efficiency.

[0028] Any details not described in detail herein are well known to those skilled in the art. Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents should be encompassed by the claims of the present invention.

Claims

1. A photovoltaic module fixing structure, characterized in that: The structure comprises a left purlin (1), a middle purlin (2) and a right purlin (3); The left purlin (1), the middle purlin (2) and the right purlin (3) are in the shape of long strips, and the left purlin (1) and the right purlin (3) are symmetrically arranged with the middle line of the middle purlin (2) as the center line. A cross section of the left purlin (1) cut using a plane perpendicular to the length direction of the left purlin (1), the cross section of the left purlin (1) comprising a rectangular bottom member (1-1), the upper edge of the bottom member (1-1) being adjacent to a vertically extending first support portion (1-2); the first support portion (1-2) extending in a vertical direction and connected to a horizontally extending transverse member (1-3) at its top end, such that the transverse member (1-3) extends laterally from directly above the bottom member (1-1) in a cantilevered form, the first support portion (1-2), the transverse member (1-3) and the bottom member (1-1) enclosing a first notch (1-4), the notch width of the first notch (1-4) matching the thickness of the photovoltaic module (4); A cross section of a center purlin (2) cut using a plane perpendicular to the length direction of the center purlin (2), the cross section of the center purlin (2) comprising an upper horizontal member (2-3), a second support portion (2-2) extending vertically from below the upper horizontal member (2-3), and a lower main structure (2-1) connected to the lower end of the second support portion (2-2), the lower main structure (2-1) being rectangular and integrally connected to the upper horizontal member (2-3) in the vertical direction via the second support portion (2-2), the upper horizontal member (2-3), the second support portion (2-2) and the lower main structure (2-1) forming a second notch (2-4) and a third notch (2-5) on the left and right sides, the notch widths of the second notch (2-4) and the third notch (2-5) matching the thickness of the photovoltaic module (4); The second notch (2-4) is aligned with the upper and lower side walls of the first notch (1-4) of the left purlin (1); the third notch (2-5) is aligned with the upper and lower side walls of the first notch (1-4) of the right purlin (3); the distance between the bottom surface of the first notch (1-4) of the left purlin (1) and the bottom surface of the second notch (2-4) matches the width of the photovoltaic module (4); the distance between the bottom surface of the first notch (1-4) of the right purlin (3) and the bottom surface of the third notch (2-5) matches the width of the photovoltaic module (4).

2. The photovoltaic module fixing structure according to claim 1, characterized in that: The second notch (2-4) and the third notch (2-5) are symmetrical to each other.

3. A method for installing the photovoltaic module fixing structure according to claim 1, characterized in that: The method comprises inserting two sides of a first group of photovoltaic components (4) into a first notch (1-4) of a left purlin (1) and a second notch (2-4) of a middle purlin (2), and inserting two sides of a second group of photovoltaic components (4) into a first notch (1-4) of a right purlin (3) and a third notch (2-5) of a middle purlin (2), respectively, to install and fix the photovoltaic components (4).

Images