Corner connector of photovoltaic frame and photovoltaic module

Abstract

The utility model discloses a corner connector of a photovoltaic frame and a photovoltaic assembly, and the corner connector of the photovoltaic frame comprises a corner connector base body which is provided with a first protruding part and a second protruding part which are perpendicular to each other; the two frames are arranged and arranged on the first protruding part and the second protruding part in a sleeving mode respectively. The nesting sleeve is arranged between the frame and the first protruding part, and the nesting sleeve is detachably connected with the first protruding part. According to the corner brace of the photovoltaic frame and the photovoltaic module provided by the invention, through a nesting and embedding mode, the interlayer shear strength of the composite frame at the assembly position is enhanced, and the problem that the interlayer shear effect of a full-yarn frame is relatively poor is solved.

Description

Technical Field

[0001] This utility model relates to the field of new energy equipment technology, and more specifically, to a corner bracket for a photovoltaic frame. Furthermore, this utility model also relates to a photovoltaic module including the aforementioned corner bracket. Background Technology

[0002] The composite material frames currently on the market are generally divided into two categories in terms of the composition of reinforcing materials: one is "fiberglass yarn + fiberglass mat + resin", and the other is "fiberglass yarn + resin".

[0003] The former has the advantage of sufficient interlayer shear strength, high overall structural strength of the material, and assembly advantage in the subsequent frame assembly process. This assembly advantage is that generally only punching (grooving) on ​​the D side of the frame profile to form anchor points is required, which allows the toothed corner code to be interference-fitted, thus achieving stable assembly of the frame. However, due to the characteristic that the fiberglass felt itself is prone to fraying during the pultrusion molding process, it is easy to cause problems such as uneven profile wall thickness, large straightness and curvature, and low appearance product qualification rate.

[0004] The latter, all-glass fiber composite material (excluding glass fiber mat), can solve problems such as uneven wall thickness, straightness, and surface unevenness, achieving a product qualification rate of 95% or higher. While the all-fiber composite frame solves the above problems, the material itself lacks longitudinal reinforcement, resulting in relatively weak interlaminar shear force in the longitudinal direction. Although the interlaminar shear performance of the composite material can be improved by using glass fiber yarn treated with special impregnating agents and by using specially formulated resins that are highly bonded to the glass fiber yarn, this performance still falls short of the former. During assembly, punching (grooving) the profile can cause the continuous glass fiber yarns of the profile to break, leading to a decrease in the tensile and interlaminar shear performance of the profile. Therefore, the punching (grooving) process suitable for the former is not suitable for the existing product.

[0005] Meanwhile, the existing method of assembling the corners of the frame generally involves cutting the frame at a 45° angle and then assembling the two frame pieces at the corners (to form a 90° angle). During the cutting process of the composite frame, there are errors in cutting accuracy and low cutting efficiency. This results in corner gaps after the frame is assembled, and if the error is large, the frame corners may be misaligned, which will lead to the downgrading of the photovoltaic module and cause losses to the company.

[0006] In summary, how to improve the interlayer shear strength of the frame is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a corner code for a photovoltaic frame. By setting a nest between the frame and the corner code substrate, the interlayer shear strength of the composite frame at the assembly point is enhanced through the nesting and embedding method, thus solving the problem of poor shear effect between frames.

[0008] Another objective of this invention is to provide a photovoltaic module that includes the corner brackets of the aforementioned photovoltaic frame.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A corner bracket for a photovoltaic frame, comprising:

[0011] An angle bracket base, on which a first protrusion and a second protrusion are provided perpendicularly to each other;

[0012] The frame has two parts, which are respectively fitted onto the first protrusion and the second protrusion;

[0013] The nest is located between the border and the first protrusion, and the nest is detachably connected to the first protrusion.

[0014] Preferably, the first protrusion includes a locking arm and a locking boss. The locking arm has a U-shaped structure, and there are two locking bosses, which are respectively disposed at the two ends of the locking arm. The nest is a tubular structure, and the interior of the nest is provided with a locking groove, which is engaged with the locking boss.

[0015] Preferably, it further includes a nested cover, which is detachably connected to the nest. The surface of the nest is provided with a positioning groove and a positioning boss arranged along its length direction, and the nest is provided with an inner locking arm.

[0016] Preferably, the end of the second protrusion is a tapered head, the second protrusion is provided with two impregnation cavities, a first reinforcing rib is provided between the two impregnation cavities, and the second protrusion is provided with a positioning groove perpendicular to the first reinforcing rib.

[0017] Preferably, at least two impregnation bosses are evenly distributed on the surface of the second protrusion, an impregnation groove is provided between two adjacent impregnation bosses, and an impregnation groove inlet is provided on the conical head.

[0018] Preferably, the second protrusion is further provided with an anti-overflow adhesive strip, and the corner bracket base is provided with a water flow groove.

[0019] Preferably, the frame includes a tubular segment with a rectangular cross-section and an L-shaped segment connected to the tubular segment. The tubular segment has a second reinforcing rib parallel to its central axis inside, and the outer surface of the L-shaped segment has a limiting boss and a limiting groove.

[0020] Preferably, the L-shaped segment is provided with an overflow groove that opens toward the tubular segment, and the space between the L-shaped segment and the tubular segment forms an engagement groove.

[0021] Preferably, the corner code base is provided with a limiting end face, and the limiting end face has the same cross-section as the frame.

[0022] A photovoltaic module includes corner brackets for a photovoltaic frame, wherein the corner brackets for the photovoltaic frame are any of the corner brackets for photovoltaic frames described above.

[0023] This utility model provides a corner bracket for a photovoltaic frame. The base of the corner bracket is provided with a first protrusion and a second protrusion that are perpendicular to each other. There are two frames, one of which is directly fitted onto the outer periphery of the second protrusion. The first protrusion and the other frame are nested. By embedding the nest into the first protrusion and the frame, the interlayer shear strength of the composite frame at the assembly point is enhanced, and the problem of poor interlayer shear effect of the all-yarn frame is solved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 An exploded view of the corner bracket of the photovoltaic frame provided by this utility model;

[0026] Figure 2 A top view of the frame provided by this utility model;

[0027] Figure 3 A cross-sectional view of the nested and first protruding part assembly provided by this utility model;

[0028] Figure 4 This is an overall assembly drawing of the corner bracket of the photovoltaic frame provided by this utility model.

[0029] Figure label:

[0030] 1-Corner code base; 101-Water channel; 102-Limiting end face; 2-First protrusion; 201-Engaging arm; 202-Engaging boss; 3-Second protrusion; 301-Conical head; 302-Glue impregnation cavity; 303-First reinforcing rib; 304-Positioning groove; 305-Glue impregnation boss; 306-Glue impregnation tank; 307-Glue impregnation tank inlet; 308-Anti-overflow strip; 4-Frame; 401-Second reinforcing rib; 402-Limiting boss; 403-Limiting groove; 404-Overflow groove opening; 405-Engaging groove opening; 5-Nesting; 501-Engaging groove; 502-Positioning groove; 503-Positioning boss; 504-Inner engaging arm; 6-Nesting cover. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The core of this utility model is to provide a corner bracket for a photovoltaic frame that enhances the interlayer shear strength of the composite frame at the assembly point through a nested embedding method.

[0033] Another core aspect of this invention is to provide a photovoltaic module that includes the corner brackets of the aforementioned photovoltaic frame.

[0034] It should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating the description of this application and simplifying the description. It is 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 application.

[0035] This application provides a corner code for a photovoltaic frame, comprising: a corner code base 1, a frame 4, and a nesting 5;

[0036] The corner code base 1 is provided with a first protrusion 2 and a second protrusion 3 that are perpendicular to each other;

[0037] The frame 4 has two parts, which are respectively fitted onto the first protrusion 2 and the second protrusion 3;

[0038] The nest 5 is located between the frame 4 and the first protrusion 2, and the nest 5 and the first protrusion 2 are detachably connected.

[0039] For details, please refer to the appendix. Figure 1 With appendix Figure 4The corner bracket base 1 can be considered as a block structure, with a first protrusion 2 and a second protrusion 3 extending outward from the base on its surface, as shown in the attached figure. The first protrusion 2 is the relatively longer end, extending upward in the vertical direction, while the second protrusion 3 is the shorter end, extending to the right in the horizontal direction. This application has two borders 4, and the two borders 4 have the same structure. The two borders 4 correspond to the first protrusion 2 and the second protrusion 3 respectively. The borders 4 can be directly fitted onto the surface of the second protrusion 3. A nesting 5 is provided between the borders 4 and the first protrusion 2, which enhances the layering of the all-yarn border. Interlayer shear strength: Most corner brackets for aluminum alloy or composite frames on the market use interference fit. Interference fit can easily lead to internal cracks in anisotropic composite frames, posing a safety hazard. The nested 5 embedded method enhances the interlayer shear strength of the composite frame at the assembly point, solving the problem of poor interlayer shear performance of all-yarn frames. Since the first protrusion 2 and the second protrusion 3 are perpendicular to each other, that is, the right-angle corner connection process of all composite materials is adopted, which solves the problem of poor interlayer shear performance of all-yarn composites, as well as the problems of low frame cutting accuracy and low oblique cutting efficiency.

[0040] Based on the above embodiments, the first protrusion 2 includes a locking arm 201 and a locking boss 202. The locking arm 201 has a U-shaped structure, and there are two locking bosses 202, which are respectively located at the two ends of the locking arm 201. The nest 5 has a tubular structure, and the interior of the nest 5 is provided with a locking groove 501. The locking groove 501 and the locking boss 202 are engaged.

[0041] For details, please refer to the appendix. Figure 3 That is, attached Figure 1 The cross-sectional view of the X-part assembly shows that the locking arm 201 has a U-shaped structure with its axis set vertically. Both ends of the locking arm 201 have locking bosses 202. It should be noted that the locking bosses 202 are triangular prism structures. The two locking bosses 202 can be combined to form a conical head that can extend to both sides or be squeezed inward. The nest 5 has a tubular structure. During installation, the locking arm 201 and the locking bosses 202 can be inserted into the nest 5. Generally, the two locking arms 201 will move in opposite directions under the squeezing of the inner wall of the nest 5 in the initial state. When the lower end face of the nest 5 contacts the corner bracket base 1, the locking bosses 202 can be locked into the locking groove 501, thereby realizing the locking and positioning of the nest 5 and the first protrusion 2.

[0042] Based on the above embodiments, a nested cover 6 is also included. The nested cover 6 is detachably connected to the nest 5. The surface of the nest 5 is provided with a positioning groove 502 and a positioning boss 503 arranged along its length direction. The nest 5 is provided with an inner locking arm 504.

[0043] Specifically, the nested cover 6 can be fastened to the top opening of the nest 5. Its purpose is to solve the assembly blockage of the inner cavity of the frame 4 by the adhesive. The surface of the nest 5 is provided with a positioning groove 502 and a positioning boss 503 along the vertical direction. The positioning boss 503 is located in the middle of the side wall of the nest 5, and both sides are provided with positioning grooves 502 to strengthen the matching and positioning assembly with the inner cavity of the frame 4. The inner locking arm 504 provided inside the nest 5 is used to reduce the inner wall size of the nest 5, thereby increasing the structural strength of the locking part of the inner cavity of the nest 5.

[0044] In some embodiments, the end of the second protrusion 3 is a tapered head 301, the second protrusion 3 is provided with two impregnation cavities 302, a first reinforcing rib 303 is provided between the two impregnation cavities 302, and the second protrusion 3 is provided with a positioning groove 304 perpendicular to the first reinforcing rib 303.

[0045] Specifically, the conical head 301 makes it easier to insert into the cavity of the frame 4. Generally, the second protrusion 3 and the frame 4 need to be fixed with glue. The glue-impregnation cavity 302 can store excess glue and prevent glue overflow caused by excessive injection pressure. The first reinforcing rib 303 can provide stable support when the nest 5 and the corner bracket base 1 are interference-fitted. The upper and lower ends of the first reinforcing rib 303 are provided with transverse positioning grooves 304. The positioning grooves cooperate with the frame 4 to achieve snap-fit ​​assembly and improve assembly accuracy.

[0046] Based on the above embodiment, at least two impregnation bosses 305 are evenly distributed on the surface of the second protrusion 3, an impregnation groove 306 is provided between two adjacent impregnation bosses 305, and an impregnation groove inlet 307 is provided on the conical head 301.

[0047] Specifically, the surface of the second protrusion 3 is provided with a plurality of glue-impregnating bosses 305 and glue-impregnating tanks 306 parallel to the first reinforcing rib 303. During installation, glue is smoothly introduced between the second protrusion 3 and the frame 4 through the glue-impregnating tank inlet 307. When the glue injection speed is normal, the glue can fully impregnate between the second protrusion 3 and the frame 4. After the glue is fixed, it can form a snap-fit ​​relationship with the glue-impregnating bosses 305, ensuring reliable fixation between the frame 4 and the second protrusion 3.

[0048] Based on the above embodiments, the second protrusion 3 is also provided with an anti-overflow adhesive strip 308, and the corner code base 1 is provided with a water flow channel 101.

[0049] Specifically, an anti-overflow adhesive strip 308 is provided at the root of the second protrusion 3, which is parallel to the glue impregnation tank 306, and the root dimension of the second protrusion 3 is larger than the middle dimension. The anti-overflow adhesive strip 308 can prevent glue from overflowing during the assembly process.

[0050] In some embodiments, the frame 4 includes a tubular segment with a rectangular cross-section and an L-shaped segment connected to the tubular segment. The tubular segment has a second reinforcing rib 401 parallel to its central axis inside, and the outer surface of the L-shaped segment has a limiting boss 402 and a limiting groove 403.

[0051] Specifically, the structure of border 4 can be found in the attached document. Figure 2 That is, attached Figure 1 The schematic diagram of part X shows that frame 4 consists of two parts: a rectangular tubular structure and an L-shaped sheet structure, also known as an L-shaped segment. The L-shaped segment is fixed to the right-angled side of the tubular structure. For ease of description, we will refer to the A, B, C, and D sides of frame 4. Inside frame 4, a second reinforcing rib 401 is provided on the side corresponding to surface C. The purpose of this rib is to increase the longitudinal strength of frame 4 and facilitate the positioning and guidance of the corner bracket base 1 or the nesting 5. This also improves the assembly and positioning accuracy of the connector and frame 4. Surface A of the frame is provided with a limiting boss 402 and a limiting groove 403. The limiting groove 403 allows the limiting boss 402 of the pressing block to form a locking and contact surface with the groove on surface A of the composite frame, thereby fixing the clip and the photovoltaic frame. The limiting boss 402 allows the limiting boss of the composite pressing block to form a locking and contact surface with the groove on surface A of the composite frame, thereby fixing the clip and the photovoltaic frame.

[0052] Based on the above embodiment, the L-shaped segment is provided with an overflow groove 404 with an opening facing the tubular segment, and the space between the L-shaped segment and the tubular segment forms an engagement groove 405.

[0053] Specifically, the locking slot 405 is the space between the L-shaped segment and the tubular segment, which can achieve the purpose of stable locking of photovoltaic laminates. The overflow slot 404 can fill the excess glue when the fastener is glued and assembled with the frame, preventing glue from overflowing, and at the same time increasing the adhesion between large fasteners and frames.

[0054] Based on the above embodiment, a limiting end face 102 is provided on the corner code base 1, and the limiting end face 102 has the same cross-section as the frame 4.

[0055] Specifically, the limiting end face 102 has the same cross-section as the frame 4, making it more aesthetically pleasing after assembly. The setting of the limiting end face 102 can position the left side of the frame 4 to ensure assembly accuracy.

[0056] It should be noted that the frame 4 is prepared by pultrusion molding, which is made of about 70% fiberglass yarn / felt and about 30% epoxy resin / polyurethane resin through pultrusion molding and other molding processes; the nest 5 is prepared by pultrusion molding / compression molding, which is made of about 70% fiberglass yarn / felt and about 30% epoxy resin / polyurethane resin through pultrusion / compression molding and other molding processes; the corner code substrate 1 is prepared by injection molding / compression molding, which is made of about 70% fiberglass yarn / felt and about 30% epoxy resin / polyurethane resin through injection molding / compression molding and other molding processes.

[0057] Furthermore, this application has also optimized the number of connectors. The connectors for a full-yarn composite frame typically consist of two nests plus one corner bracket base. This solution optimizes the short-side nesting, reducing the total number of components to two: one corner bracket base 1 plus one nest 5. This reduces the number of assembly parts, improves mechanical fit accuracy, and optimizes the adhesive assembly process. Composite corner brackets and composite frames are generally connected with structural adhesive. Conventional solutions use adhesive application (injection) into the frame cavity. Open nests easily cause the adhesive inside the frame cavity to accumulate, and this excessive accumulation can flow into the nest cavity, blocking its travel after curing. This solution uses a covered nest cover 6, preventing adhesive from flowing from the frame cavity into the nest cavity after the nest is inserted. This avoids blocking the corner bracket's travel within the nest cavity, thus significantly optimizing the assembly environment and improving assembly accuracy.

[0058] In addition to the corner brackets of the photovoltaic frame mentioned above, this utility model also provides a photovoltaic module that includes the corner brackets of the photovoltaic frame disclosed in the above embodiments. For the structure of other parts of the photovoltaic module, please refer to the prior art, which will not be repeated here.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The foregoing has provided a detailed description of the corner code for a photovoltaic frame and the photovoltaic module provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A corner fitting for a photovoltaic frame, the corner fitting comprising: The utility model relates to a kind of corner code base (1), which is provided with mutually perpendicular first protruding part (2) and second protruding part (3) on it;Two frame (4) are provided with, and are respectively set in first protruding part (2) and second protruding part (3);Nest (5) is between frame (4) and first protruding part (2), and nest (5) and first protruding part (2) are detachably connected. First protruding part (2) includes clamping arm (201) and clamping boss (202), clamping arm (201) is U-shaped structure, clamping boss (202) is provided with two and is respectively arranged in the two ends of clamping arm (201), nest (5) is tubular structure, and clamping groove (501) is provided in the inside of nest (5), and clamping groove (501) and clamping boss (202) are connected. It further includes nest cover (6), and nest cover (6) and nest (5) are detachably connected, the surface of nest (5) is provided with positioning groove (502) and positioning boss (503) along its length direction, and the inside of nest (5) is provided with inner clamping arm (504). The end of second protruding part (3) is conical head (301), two impregnation cavities (302) are provided on second protruding part (3), first reinforcing rib (303) is provided between two impregnation cavities (302), and positioning groove (304) is provided on second protruding part (3) and perpendicular to first reinforcing rib (303).

2. The photovoltaic frame corner key of claim 1, wherein, At least two impregnation bosses (305) are uniformly distributed on the surface of second protruding part (3), impregnation groove (306) is provided between two adjacent impregnation bosses (305), and impregnation groove inlet (307) is provided on conical head (301).

3. The photovoltaic frame corner key of claim 2, wherein, Second protruding part (3) is further provided with anti-overflow glue strip (308), and water channel (101) is provided on corner code base (1).

4. The photovoltaic frame corner key of claim 1, wherein, Frame (4) includes tubular section with rectangular cross section and L-shaped section connected to the tubular section, the inside of tubular section is provided with second reinforcing rib (401) parallel to the central axis, and the outer surface of L-shaped section is provided with limiting boss (402) and limiting groove (403).

5. The photovoltaic frame corner key of claim 4, wherein, Overflow groove opening (404) is provided on L-shaped section, and the space between L-shaped section and tubular section forms clamping groove opening (405).

6. The photovoltaic frame corner key of claim 5, wherein, Limiting end surface (102) is provided on corner code base (1), and limiting end surface (102) is same with the cross section of frame (4).

7. The photovoltaic frame corner according to claim 1, wherein, The corner code of the photovoltaic frame is the corner code of the photovoltaic frame as claimed in any one of claims 1 to 9.

8. The photovoltaic frame corner of claim 7, wherein, ​ 9. The corner tab of a photovoltaic frame according to any one of claims 1 to 8, wherein, ​ 10. A photovoltaic module comprising a corner key of a photovoltaic frame, characterized in that, ​

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