Anti-falling structure for connection of photovoltaic module and purline

Abstract

The utility model provides an anti-falling structure for connection of a photovoltaic module and a purline, which comprises a limiting main body which is of an inequilateral L-shaped structure and comprises a top connecting part and a vertical limiting part which are integrally formed; the top connecting part is of a short-edge structure, is internally provided with a bolt mounting through hole, and is in bolt connection with the inner side of the photovoltaic module frame through a bolt assembly; the vertical limiting part is of a long-edge structure, the section of the vertical limiting part is provided with a groove matched with a C-shaped steel purline web, a clamping groove structure is arranged on the opening side of C-shaped steel, and three-dimensional mechanical limiting is achieved through double constraint of the groove and the clamping groove structure. According to the utility model, the limiting main body with the inequilateral L-shaped structure is adopted, the top connecting part of the limiting main body is in bolted connection with the inner side of the photovoltaic module frame, the vertical limiting part is matched with the web of the C-shaped steel purline through the groove, and the clamping groove structures are arranged to hook the two sides of the inner curled edge of the C-shaped steel purline, so that three-dimensional mechanical limiting is realized.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic modules, and in particular to an anti-detachment structure for connecting photovoltaic modules and purlins. Background Technology

[0002] With the increasing global demand for clean energy, solar energy, as a renewable and pollution-free energy source, has received widespread attention for its development and utilization. Photovoltaic modules, as the core component of solar photovoltaic power generation systems, primarily convert solar energy into electrical energy. In recent years, the photovoltaic industry has developed rapidly, with continuous technological advancements, and the efficiency and stability of photovoltaic modules have been gradually improving. In the construction of photovoltaic power plants, the installation method of photovoltaic modules is crucial, directly affecting their power generation efficiency, lifespan, and the safety and reliability of the entire photovoltaic system. Currently, the common method for installing photovoltaic modules is to fix them to purlins using a connecting structure, forming a stable photovoltaic array.

[0003] Traditional photovoltaic (PV) modules and purlins are typically connected using simple bolts. In practical applications, PV power stations are often located outdoors and are subject to various natural factors, especially wind-induced vibration loads. Wind-induced vibration loads are both periodic and random, causing PV modules to vibrate. Under such vibration, bolts are prone to loosening. Once the bolts loosen, the connection between the PV module and the purlin becomes unstable, potentially leading to increased displacement and swaying of the PV module. Long-term bolt loosening can also cause connection failure, causing the PV module to detach from the purlin. This not only affects the normal power generation of the PV power station but may also pose a safety hazard to surrounding personnel and equipment. Utility Model Content

[0004] To address the problem of poor wind vibration load resistance in the existing photovoltaic module-purlin connection structure, this utility model provides an anti-detachment structure for the connection between photovoltaic modules and purlins;

[0005] The present invention provides a photovoltaic module-purlin connection anti-detachment structure using the following technical solution:

[0006] A structure for preventing the photovoltaic module from falling off the purlin connection includes: a limiting body, which is an unequal-sided L-shaped structure, including an integrally formed top connecting part and a vertical limiting part; the top connecting part is a short-side structure with a bolt mounting through hole inside, and is connected to the inner side of the photovoltaic module frame by bolt assembly; the vertical limiting part is a long-side structure, and its cross-section has a groove matching the web of the C-shaped steel purlin, and a slot structure is provided on the open side of the C-shaped steel, so as to achieve three-dimensional mechanical limiting through the dual constraint of the groove and the slot structure;

[0007] Furthermore, the slot structure of the vertical limiting part includes a first slot and a second slot, which respectively hook onto both sides of the inner rolled edge of the C-shaped steel purlin, forming a dual restriction on longitudinal and lateral displacement.

[0008] Furthermore, the bolt assembly includes a connecting bolt, a nut, a large flat washer, and a spring washer. The connecting bolt passes through the connecting hole of the photovoltaic module frame, then through the bolt mounting through hole and the connecting hole of the C-shaped steel purlin, and is fitted with the large flat washer and the spring washer. Finally, the bolt is connected and fixed as a whole by the nut to suppress bolt loosening under wind vibration load.

[0009] Furthermore, the limiting body is made into an unequal-sided L-shaped structure by cold stamping or cold bending process, and can be made of Q235B steel, S350GD-ZM275 steel, S420GD-ZM275 steel or stainless steel.

[0010] Furthermore, the cross-sectional dimensions of the groove are interference-fitted with the web width of the C-shaped steel purlin;

[0011] Furthermore, the outer surface of the limiting body is uniformly coated with an anti-corrosion coating, which is a hot-dip galvanized aluminum-magnesium alloy coating or a hot-dip galvanized coating.

[0012] In summary, the beneficial effects of this utility model are as follows:

[0013] This utility model adopts an unequal-sided L-shaped limiting body, with its top connecting part bolted to the inner side of the photovoltaic module frame, and the vertical limiting part matching the web of the C-shaped steel purlin through a groove, and a slot structure hooking the two sides of the inward rolled edge of the C-shaped steel purlin, thus realizing three-dimensional mechanical limiting; this design can effectively limit the displacement of the photovoltaic module in the longitudinal and lateral directions, and improve the stability of the connection structure.

[0014] Meanwhile, special bolt assemblies, including large flat washers and spring washers, are used to suppress bolt loosening under wind vibration loads and ensure the reliability of the connection. The limiting body is made of suitable steel and manufactured using cold stamping or cold bending processes to ensure the strength and precision of the structure. In addition, the outer surface of the limiting body is coated with an anti-corrosion coating, which improves the corrosion resistance of the structure and extends its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection structure between the photovoltaic module frame and the C-shaped steel purlin of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the limiting body of this utility model;

[0017] Figure 3 This is a schematic diagram of the card slot structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the bolt assembly of this utility model.

[0019] As shown in the figure: 1-Limiting body, 11-Top connecting part, 12-Vertical limiting part, 111-Bolt mounting through hole, 121-Groove, 122-Slot structure, 2-Bolt assembly, 3-Photovoltaic module frame, 4-C-shaped steel purlin, 41-Inward rolled edge, 1221-First slot, 1222-Second slot, 21-Connecting bolt, 22-Nut, 23-Large flat washer, 24-Spring washer. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described in detail below:

[0021] This utility model embodiment discloses an anti-detachment structure for the connection between photovoltaic modules and purlins, such as... Figure 1 , 2 As shown, a structure for preventing the photovoltaic module from falling off the purlin includes: a limiting body 1, which is an unequal-sided L-shaped structure, including an integrally formed top connecting part 11 and a vertical limiting part 12; the top connecting part 11 is a short-side structure with a bolt mounting through hole 111 inside, and is connected to the inner side of the photovoltaic module frame 3 by bolt assembly 2; the vertical limiting part 12 is a long-side structure, and its cross-section has a groove 121 that matches the web of the C-shaped steel purlin 4, and a slot structure 122 is provided on the opening side of the C-shaped steel, so as to achieve three-dimensional mechanical limiting through the dual constraint of the groove 121 and the slot structure 122; in this embodiment, the core component of the anti-fall-off structure is the limiting body 1. The main body 1 adopts an unequal-sided L-shaped structure, which is based on mechanical principles. The top connecting part 11 connects to the inner side of the photovoltaic module frame 3, and the vertical limiting part 12 cooperates with the C-shaped steel purlin 4. The structural characteristics in different directions are used to achieve stable support and limiting of the C-shaped steel purlin 4. The one-piece molding design ensures the integrity and stability of the structure, so that the limiting body 1 can better withstand various external forces. The groove 121 of the vertical limiting part 12 matches the web of the C-shaped steel purlin 4, and the slot structure 122 cooperates with the open side of the C-shaped steel, realizing three-dimensional mechanical limiting, which can effectively limit the displacement of the photovoltaic module in different directions and improve the stability and reliability of photovoltaic module installation.

[0022] like Figure 1 , 3As shown, the slot structure 122 of the vertical limiting part 12 includes a first slot 1221 and a second slot 1222, which respectively hook onto both sides of the inward rolled edge 41 of the C-shaped steel purlin 4, forming a dual restriction on longitudinal and lateral displacement. In this embodiment, the slot structure 122 of the vertical limiting part 12 includes a first slot 1221 and a second slot 1222. Its principle is to use the cooperation between the slot and the inward rolled edge 41 of the C-shaped steel purlin 4 to restrict its displacement. When the photovoltaic module is subjected to external force, the slot can hook onto the C-shaped steel purlin 4. The inwardly rolled edges 41 on both sides of the C-shaped steel purlin 4 restrict the movement of the C-shaped steel purlin 4 in both the longitudinal and transverse directions, thus achieving dual restriction. Under the action of loads such as wind vibration, the photovoltaic module and the C-shaped steel purlin 4 may experience longitudinal displacement. The slot structure 122 can effectively prevent such displacement and ensure the stability of the photovoltaic module in the longitudinal direction. Similarly, in the transverse direction, the slot can also restrict the movement of the photovoltaic module and prevent it from shifting due to transverse forces, further improving the installation safety of the photovoltaic module.

[0023] like Figure 1 , 4 As shown, the bolt assembly 2 includes a connecting bolt 21, a nut 22, a large flat washer 23, and a spring washer 24. The connecting bolt 21 passes through the connecting hole of the photovoltaic module frame 3, then through the bolt mounting through hole 111 and the connecting hole of the C-shaped steel purlin 4 in sequence. The large flat washer 23 and the spring washer 24 are fitted together, and finally the whole assembly is fixed by the nut 22 to suppress bolt loosening under wind vibration load. In this embodiment, the principle of the bolt assembly 2 is to tightly connect the photovoltaic module frame 3, the limiting body 1, and the C-shaped steel purlin 4 together through the tightening force of the bolt.

[0024] The limiting body 1 is made into an unequal-sided L-shaped structure using cold stamping or cold bending processes. It can be made of Q235B steel, S350GD-ZM275 steel, S420GD-ZM275 steel, or stainless steel. In this embodiment, the limiting body 1 is made into an unequal-sided L-shaped structure using cold stamping or cold bending processes. Both processes are performed on the steel at room temperature, ensuring that the mechanical properties and microstructure of the steel are not affected. The selection of Q235B, S350GD-ZM275, or S420GD-ZM275 steel is... Because these steels possess good strength, toughness, and corrosion resistance, they can meet the structural requirements for connecting photovoltaic modules and purlins; cold stamping and cold bending processes can precisely control the size and shape of the limiting body 1, ensuring its fitting accuracy with the photovoltaic module frame 3 and C-shaped steel purlin 4; at the same time, these two processes have high production efficiency and relatively low cost; the high strength and good toughness of the selected steel can withstand the stress under loads such as wind vibration, ensuring the structural integrity of the limiting body 1; in addition, the corrosion resistance of the steel also helps to extend the service life of the limiting body 1 and reduce maintenance costs;

[0025] like Figure 1 As shown, the cross-sectional dimensions of the groove 121 are interference-fitted with the web width of the C-shaped steel purlin 4; in this embodiment, the cross-sectional dimensions of the groove 121 are interference-fitted with the web width of the C-shaped steel purlin 4, that is, the size of the groove 121 is slightly larger than the web width of the C-shaped steel purlin 4; this facilitates the installation of the C-shaped steel purlin 4.

[0026] The outer surface of the limiting body 1 is uniformly coated with an anti-corrosion coating (not shown in the figure), which is a hot-dip galvanized aluminum-magnesium alloy coating or a hot-dip galvanized coating. In this embodiment, the principle of these coatings is to form a dense protective film on the steel surface, preventing oxygen, moisture and other corrosive substances from contacting the steel, thereby playing a role in corrosion prevention. In outdoor environments, the connection structure between photovoltaic modules and purlins is easily affected by rain, moisture, ultraviolet rays and other factors, which can cause corrosion. The anti-corrosion coating can effectively prevent steel corrosion, extend the service life of the limiting body 1, and reduce replacement and maintenance costs. The presence of the anti-corrosion coating ensures that the structural performance of the limiting body 1 is not affected by corrosion, thereby improving the reliability of the connection between the photovoltaic modules and purlins and ensuring the long-term stable operation of the photovoltaic system.

[0027] The implementation principle of this utility model embodiment is as follows:

[0028] During installation, the connecting bolt 21 is passed through the connecting hole of the photovoltaic module frame 3, and then through the bolt mounting through hole 111 of the top connecting part 11 of the limiting body 1 and the connecting hole of the C-shaped steel purlin 4 in sequence. During the drilling process, it is necessary to ensure that the bolt passes through each hole smoothly and not to force it to avoid damaging the bolt or the hole.

[0029] Large flat washer 23 and spring washer 24 are sequentially fitted onto connecting bolt 21; large flat washer 23 should be tightly against the inner wall of C-shaped steel purlin 4, and spring washer 24 should be installed between large flat washer 23 and nut 22.

[0030] Tighten nut 22 with a wrench of appropriate size. The tightening degree should be moderate, ensuring that bolt assembly 2 can firmly connect photovoltaic module frame 3, limiting body 1 and C-shaped steel purlin 4, while avoiding damage to the bolt or connected parts due to overtightening. During the tightening of nut 22, pay attention to the gap between photovoltaic module frame 3 and limiting body 1 to ensure that the two are tightly connected without any loosening. At the same time, due to the function of spring washer 24, the bolt should have a certain preload after tightening nut 22 to prevent the bolt from loosening under wind vibration load.

[0031] After installation, a comprehensive inspection is carried out on the anti-detachment structure connecting the entire photovoltaic module and the purlin; check whether the installation of the limiting body 1 is firm, whether the groove 121 of the vertical limiting part 12 fits well with the web of the C-shaped steel purlin 4, and whether the slot structure 122 accurately hooks the two sides of the inner rolled edge 41 of the C-shaped steel purlin 4.

[0032] Check the connection of the bolt assembly 2, including whether the bolts are tightened, whether the spring washer 24 provides elastic pre-tightening, and whether the large flat washer 23 is flat and fits properly; at the same time, check whether the connection between the photovoltaic module frame 3 and the top connection part 11 of the limiting body 1 is tight, and whether there is any looseness or excessive gap.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A structure for preventing photovoltaic modules from falling off when connected to purlins, characterized in that, include: The limiting body (1) is an unequal-sided L-shaped structure, including an integrally formed top connecting part (11) and a vertical limiting part (12); the top connecting part (11) is a short-side structure with a bolt mounting through hole (111) inside, which is connected to the inner side of the photovoltaic module frame (3) by bolt assembly (2); the vertical limiting part (12) is a long-side structure, and its cross section is provided with a groove (121) matching the web of the C-shaped steel purlin (4), and a slot structure (122) is provided on the opening side of the C-shaped steel, so that three-dimensional mechanical limiting is achieved through the dual constraint of the groove (121) and the slot structure (122).

2. The anti-detachment structure for connecting photovoltaic modules and purlins according to claim 1, characterized in that: The slot structure (122) of the vertical limiting part (12) includes a first slot (1221) and a second slot (1222), which respectively hook onto the two sides of the inner rolled edge (41) of the C-shaped steel purlin (4), forming a dual restriction on longitudinal and lateral displacement.

3. The anti-detachment structure for connecting photovoltaic modules and purlins according to claim 1, characterized in that: The bolt assembly (2) includes a connecting bolt (21), a nut (22), a large flat washer (23), and a spring washer (24). The connecting bolt (21) passes through the connecting hole of the photovoltaic module frame (3), then through the bolt mounting through hole (111) and the connecting hole of the C-shaped steel purlin (4), and is fitted with the large flat washer (23) and the spring washer (24). Finally, it is connected and fixed as a whole by the nut (22) to suppress bolt loosening under wind vibration load.

4. The anti-detachment structure for connecting photovoltaic modules and purlins according to claim 1, characterized in that: The limiting body (1) is made into an unequal-sided L-shaped structure by cold stamping or cold bending process, and can be made of Q235B steel, S350GD-ZM275 steel, S420GD-ZM275 steel or stainless steel.

5. The anti-detachment structure for connecting photovoltaic modules and purlins according to claim 1, characterized in that: The cross-sectional dimensions of the groove (121) are interference fit with the web width of the C-shaped steel purlin (4).

6. The anti-detachment structure for connecting photovoltaic modules and purlins according to claim 1, characterized in that... The outer surface of the limiting body (1) is uniformly coated with an anti-corrosion coating, which is made of hot-dip galvanized aluminum-magnesium alloy coating or hot-dip galvanized coating.

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