Photovoltaic composite frame and preparation method thereof

Abstract

The present invention relates to the technical field of photovoltaic equipment, and in particular to a photovoltaic composite frame and a preparation method thereof, comprising a frame, wherein the frame is provided with a mounting groove for installing a photovoltaic module, the frame is enclosed by two transverse frames and two longitudinal frames, and adjacent frames are fixed to each other by connectors, and the upper and lower end faces of the connectors are respectively kept flush with the upper and lower end faces of the frame, and anti-slip grooves are respectively provided on the upper and lower end faces of the frame. The present invention provides a connector for connecting adjacent frames between adjacent frames, and allows the upper end of the connector to be kept flush with the upper and lower end faces of the frame, so that it can be fixed without opening screw holes, avoiding low friction caused by a small contact area due to the opening of screw holes; and by providing anti-slip grooves on the upper and lower end faces of the frame, the friction between the upper and lower frames can be increased, avoiding slipping during transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic equipment, and in particular to a photovoltaic composite frame. Background Art

[0002] Photovoltaic frames are an important component of solar photovoltaic modules. Their function is to encapsulate materials such as cells, glass, and backplanes, and to enhance the strength of the modules to facilitate transportation, installation, and protection of photovoltaic modules. Therefore, photovoltaic frame products are required to have strong load-bearing capacity and corrosion resistance. The performance of the frame has a direct impact on the installation and service life of the battery modules. Most existing photovoltaic frames are made of composite materials.

[0003] Composite frames are often made of resin and glass fiber. In order to resist aging caused by natural factors such as climate and sunlight, the composite frames must be sprayed with water-based / oil-based paint on the outside. On the one hand, this ensures that the composite frames have a long service life after installation. On the other hand, we found that after the photovoltaic modules are installed, they are mostly placed on temporary platforms such as pallets in a stacked manner and wait for the next flow. The flow is generally carried out by means of transportation such as forklifts. The starting and stopping operations during the flow are accompanied by inertia, which may cause the upper photovoltaic modules to slip and displace. If the inertia is large, it will cause large displacement and even safety accidents.

[0004] The reason why the friction between the upper and lower frames is small is that the adjacent frames are mostly fixed with screws, so a certain number of screw holes are opened on the upper and lower end faces of the frames, and the design of the screw holes will undoubtedly reduce the contact area of ​​the upper and lower frames; at the same time, due to the material itself, the surfaces of the upper and lower frames are too smooth and easy to slip. Therefore, it is urgent to solve the safety problem caused by slipping due to the smooth end faces of photovoltaic modules.

[0005] Therefore, a photovoltaic composite frame is proposed to solve the above-mentioned problems. Summary of the Invention

[0006] Technical problems solved

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides a photovoltaic composite frame, which can effectively solve the safety problem of the photovoltaic components in the prior art due to the smooth end surfaces.

[0008] Technical Solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] The present invention provides a photovoltaic composite frame, including a frame body, wherein a mounting groove for installing a photovoltaic module is provided inside the frame body, and the frame body is enclosed by two transverse frames and two longitudinal frames. Adjacent frames are fixed to each other by connecting members, and the upper and lower end surfaces of the connecting members are respectively kept flush with the upper and lower end surfaces of the frame body, and anti-slip grooves are respectively provided on the upper and lower end surfaces of the frame body.

[0011] Furthermore, the frame is made of polyurethane fiberglass.

[0012] Furthermore, the outer end surface of the frame is sprayed with water-based or oil-based paint.

[0013] Furthermore, the anti-slip patterns on the frame are honeycomb-shaped.

[0014] Furthermore, the connector is provided with a fixing pile at each of two adjacent frames, which can be plugged into and matched with the adjacent frames.

[0015] Furthermore, a groove is provided at the upper end of the connecting piece, and a limit block is provided at the lower end of the connecting piece. When at least two frames are stacked up and down, the limit block at the lower end of the upper frame connecting piece and the groove at the upper end of the lower frame connecting piece are plugged into and matched with each other.

[0016] Furthermore, the connecting member includes a bracket body and a guide slide rod, and the two fixed piles are respectively located on both sides of the bracket body; the guide slide rod is elastically mounted on the bracket body up and down, and the groove and limit block are respectively arranged at the upper and lower ends of the guide slide rod.

[0017] The present invention also provides a method for preparing a photovoltaic composite frame, which is used to prepare the photovoltaic composite frame mentioned above, comprising the following steps:

[0018] Step 1: Add glass mat on the substrate and open a groove on the surface of the glass mat for placing the polyurethane resin material;

[0019] Step 2: Add polyurethane resin material into the tank and place the substrate into the mold for heating;

[0020] Step 3: After the substrate formed in step 2 is cooled, it is taken out and rolled to form embossing on the end surface of the substrate;

[0021] Step 4: Cut the substrate obtained in step 3 according to a preset size ratio to obtain a finished photovoltaic composite frame;

[0022] Step 5: Place the finished photovoltaic composite frame on a friction coefficient tester to test the friction coefficient.

[0023] Furthermore, the friction coefficient tester includes a base plate, on which a glass fiber composite board is placed, and the upper end surface of the glass fiber composite board is provided with an embossed pattern identical to the embossed pattern on the finished photovoltaic composite frame. It also includes a force sensor, one end of which is provided with a fixing hook that can be fixed on the finished photovoltaic composite frame.

[0024] Furthermore, the counterweight block is detachably matched with the mounting groove on the finished photovoltaic composite frame.

[0025] Beneficial effects

[0026] Compared with the known public technologies, the technical solution provided by the present invention has the following beneficial effects:

[0027] The present invention provides a connector for connecting adjacent frames between adjacent frames, and allows the upper end of the connector to remain flush with the upper and lower end surfaces of the frame, thereby enabling fixation without the need for opening screw holes, thereby avoiding the low friction caused by the small contact area due to the opening of screw holes.

[0028] By providing anti-slip grooves on the upper and lower end surfaces of the frame, the friction between the upper and lower frames can be increased to avoid slipping during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0030] Figure 1 Schematic diagram of a photovoltaic composite frame structure (top view) in an embodiment of the present invention;

[0031] Figure 2 This is a structural diagram of the assembled state of the transverse frame and the longitudinal frame in an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the decomposed structure of the horizontal frame and the vertical frame in an embodiment of the present invention;

[0033] Figure 4 This is a side view of the structure of the transverse frame and the longitudinal frame in an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of a photovoltaic composite frame structure (viewed from above) in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the connecting member structure in an embodiment of the present invention;

[0036] Figure 7 Schematic diagram of a side cross-sectional structure of a connector structure in an embodiment of the present invention (the sink groove on the connector and the frame structure remain flush);

[0037] Figure 8 It is a schematic diagram of the side cross-sectional structure of the connecting member structure in an embodiment of the present invention (the sink groove and the frame structure on the connecting member are in a dislocated state).

[0038] The numbers in the figure represent: 1. frame; 11. mounting groove; 12. transverse frame; 13. longitudinal frame; 2. connector; 21. fixing pile; 22. groove; 221. engaging cavity; 23. limiting block; 24. bracket body; 241. sinking groove; 25. guide slide rod; 251. reset spring; 252. blocking block; 26. cavity groove; 261. guide groove. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] The present invention will be further described below with reference to the embodiments.

[0041] Example:

[0042] The prior art also mentions some methods that can improve the situation where the frame has very little friction during transfer, which leads to slipping. Most of them are done by manually sticking anti-slip stickers on the upper and lower end surfaces of the frame. However, this method not only increases labor costs, is time-consuming and labor-intensive, but also only treats the symptoms and not the root cause.

[0043] To this end, this embodiment proposes a photovoltaic composite frame, which can fundamentally improve the situation of low friction.

[0044] For details, see the attached Figure 1-8 The composite frame in this embodiment mainly includes a rectangular frame 1, and a mounting groove 11 for installing a photovoltaic module is provided inside the frame 1. When the frame 1 is installed, the mounting groove 11 is rectangular.

[0045] The frame 1 is enclosed by two symmetrically distributed transverse frames 12 and two equally symmetrically distributed longitudinal frames 13. The two sides of each transverse frame 12 are connected to a longitudinal frame 13 respectively, and the adjacent frames are fixed to each other by connecting members 2. Specifically, the connecting member 2 in this solution serves to connect the two adjacent frames.

[0046] It should be emphasized here that the frame 1 in this solution is transported in a stacked manner, that is, the layers are accumulated layer by layer. Since the upper and lower end faces of the connecting member 2 in this embodiment are on the same contact surface after the frame 1, and since there are no screw holes, the contact area between the two is maximized.

[0047] In addition, anti-slip grooves are respectively provided on the upper and lower end surfaces of the frame 1, that is, the upper and lower end surfaces of the transverse frame 12 and the longitudinal frame 13 are both provided with anti-slip grooves. In this way, when in contact, the staggered anti-slip groove design can allow the contact surfaces of the upper and lower frames 1 to obtain effective friction, thereby preventing the frame 1 from slipping due to inertia and other reasons.

[0048] Furthermore, the frame 1 is made of polyurethane glass fiber, and the outer end surface of the frame 1 is sprayed with water-based or oil-based paint.

[0049] It should be noted that the specific shape of the anti-slip lines in this embodiment is not limited. In this application, the anti-slip lines on the frame 1 are honeycomb-shaped.

[0050] In this embodiment, the connecting member 2 is provided with a fixing pile 21 corresponding to each of the two adjacent frames, which can be plugged into the adjacent frames. Each frame is provided with a cavity groove 26 arranged along its extension direction, and the upper and lower ends of the cavity groove 26 are provided with wavy or serrated guide grooves 261, and the fixing pile 21 is provided with a track corresponding to the position of the guide groove 261, so that when the frame is put on the fixing pile 21, the displacement of the frame will be restrained. It should be noted that the fixing pile 21 and the cavity groove 26 in this embodiment are assembled in a tight fit with a small gap. During assembly, in addition to aligning the guide groove 261, a certain amount of force is also required to allow the fixing pile 21 to be smoothly inserted into the guide groove 261.

[0051] More specifically, in this embodiment, a groove 22 is provided at the upper end of each connecting member 2, and a limit block 23 is provided at the lower end of the connecting member 2. When the two adjacent frames 1 are stacked, the limit block 23 at the lower end of the connecting member 2 of the upper frame 1 is plugged into the groove 22 at the upper end of the connecting member 2 of the lower frame 1. Both sides of the groove 22 do not pass through the side ends of the connecting member 2, that is, during transportation, the limit block 23 and the groove 22 can cooperate with each other, and the anti-slip texture can be used to improve the friction between the upper and lower frames while providing a certain restraint ability in the diagonal direction of the frame 1. Since the upper end of the connecting member 2 in this application is in a recessed state, there is only a contact area of ​​the size of the groove 22 between it and the upper frame 1, and the limit block 23 at the bottom extends out of the bottom end surface of the connecting member 2 and is inserted into the groove 22 on the lower frame 1. The whole body still maintains contact with the lower frame 1, which can provide multi-directional stability of the frame 1 during stacking.

[0052] It should be noted that the connecting member 2 in this embodiment includes two parts: a bracket body 24 and a guide slide bar 25. The two fixing piles 21 are respectively located on both sides of the bracket body 24, and the groove 22 is located at the upper end of the guide slide bar 25. A through hole is provided at the middle position of the bracket body 24, and the guide slide bar 25 is inserted into the through hole. A return spring 251 is provided below the upper end of the through hole and the groove 22 at the top of the guide slide bar 25. When the guide slide bar 25 is pressed downward, the groove 22 will sink. The upper end of the bracket body 24 is provided with a sinking groove 241 for the upper end head of the guide slide bar 25, that is, the part with the groove 22 to descend, and the limit block 23 is provided at the lower end of the guide slide bar 25, that is, the limit block 23 will move downward synchronously with the sliding of the guide slide bar 25 and extend out of the lower end surface of the bracket body 24.

[0053] It is worth mentioning that in this embodiment, a locking cavity 221 is formed on one side of the notch of the sink 22, and the upper end of the guide slide 25 is provided with a blocking block 252 that can extend toward the concave portion of the sink 22, and the groove 22 is opened above the blocking block 252. When the guide slide 25 is pressed and moved downward, the guide slide 25 will accumulate a certain amount of elastic potential energy. At this time, the groove 22 on the blocking block 252 is already below the notch of the sink 22. At this time, the blocking block 252 can be pushed toward the side of the locking cavity 221 to ensure that the blocking block 252 will be stuck in the locking cavity 221, thereby locking the current position of the guide slide 25.

[0054] If the original state is to be restored, the locking block 252 is separated from the locking cavity 221 and the guide slide bar 25 is released from the locked state of the current position.

[0055] The present invention also provides a method for preparing a photovoltaic composite frame, which is used to prepare the photovoltaic composite frame mentioned above, comprising the following steps:

[0056] Step 1: Add glass mat on the substrate and open a groove on the surface of the glass mat for placing the polyurethane resin material;

[0057] Step 2: Add polyurethane resin material into the tank and place the substrate into the mold for heating;

[0058] Step 3: After the substrate formed in step 2 is cooled, it is taken out and rolled to form embossing on the end surface of the substrate;

[0059] Step 4: Cut the substrate obtained in step 3 according to a preset size ratio to obtain a finished photovoltaic composite frame;

[0060] Step 5: Place the finished photovoltaic composite frame on a friction coefficient tester to test the friction coefficient.

[0061] Furthermore, the friction coefficient tester includes a base plate, on which a glass fiber composite board is placed, and the upper end surface of the glass fiber composite board is provided with an embossed pattern identical to the embossed pattern on the finished photovoltaic composite frame. It also includes a force sensor, one end of which is provided with a fixing hook that can be fixed on the finished photovoltaic composite frame.

[0062] More specifically, first, roll-embossed composite frame samples produced by different manufacturers were selected for testing as described above to determine their unique static friction coefficients, and then installed on conventional / lightweight photovoltaic modules for quasi-stacking circulation. Generally, the upper limit of the speed of forklifts and other circulation tools in the workshop does not exceed 5KM / h. When the circulation starts at this speed, the frame modules that are roll-embossed and have a larger static friction coefficient are less likely to slip than the frame modules without embossing.

[0063] Specifically, first of all, according to the investigation, in the component tray of 3-40 stacked photovoltaic components, the first 5 components from the top to the bottom are more likely to slip, and the first photovoltaic component is used as the basis for calculation as follows: the double-glass photovoltaic component has a mass of 32.4KG and a size of 2382×1134×30mm. The contact area between the upper end face of the first composite frame and the lower end face of the stacked second component is about 492.66cm2, and the mass it needs to bear is 66g / cm2. After cutting a 10cm long sample composite frame sample (the frame weighs about 140g, and the lower end face of the sample frame is in contact with the rolled glass fiber composite board with honeycomb patterns, then the mass it needs to bear is 7g / cm2), it is installed on the friction coefficient tester according to the above steps, and this case also includes a counterweight block, which is detachable and fits in the mounting groove 11 on the finished photovoltaic composite frame.

[0064] Use a 59g / cm2 counterweight to insert into the gap in the middle of the frame for counterweighting, so that the weight of the single-section sample frame on the honeycomb-patterned glass fiber composite board at the bottom is 66g / cm2, then the test can begin. The aforementioned friction coefficient meter can measure static friction and dynamic friction, and the test method designed in this embodiment mainly tests the maximum static friction. Because during the test of the friction coefficient tester, the maximum static friction is often a fixed value, while the dynamic friction changes in real time during the test, the maximum static friction is taken as the data required for the test. As a comparison group, non-rolled embossed composite frames with the same parameters can be cut for testing. Each frame is tested no less than 5 times, and the average value is taken for comparison. The test method for the first photovoltaic module is as above, and the tests for the 2nd to 5th photovoltaic modules are similar to the above method. The difference lies in the selection of the mass of the counterweight.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A photovoltaic composite frame, comprising a frame (1), wherein the frame (1) is provided with a mounting groove (11) for mounting a photovoltaic module, characterized in that: The frame (1) is formed by enclosing two transverse frames (12) and two longitudinal frames (13), and adjacent frames are fixed to each other by a connecting piece (2), and the upper and lower end surfaces of the connecting piece (2) are respectively kept flush with the upper and lower end surfaces of the frame (1), and anti-slip grooves are respectively provided on the upper and lower end surfaces of the frame (1); the connecting piece (2) is respectively provided with a fixing pile (21) corresponding to two adjacent frames and can be plugged into and matched with the adjacent frames; The upper end of the connecting member (2) is provided with a groove (22), and the lower end of the connecting member (2) is provided with a limit block (23). When at least two frames (1) are stacked up and down, the limit block (23) at the lower end of the connecting member (2) of the upper frame (1) and the groove (22) at the upper end of the connecting member (2) of the lower frame (1) are plugged into and matched with each other; The connecting member (2) comprises a bracket body (24) and a guide slide bar (25), and the two fixing piles (21) are respectively located on both sides of the bracket body (24); the guide slide bar (25) is elastically mounted on the bracket body (24) in an upward and downward manner, and the groove (22) and the limit block (23) are respectively arranged at the upper end and the lower end of the guide slide bar (25).

2. A photovoltaic composite frame according to claim 1, characterized in that: The frame (1) is made of polyurethane glass fiber.

3. The photovoltaic composite frame according to claim 1, characterized in that: The outer end surface of the frame (1) is sprayed with water-based or oil-based paint.

4. The photovoltaic composite frame according to claim 1, characterized in that: The anti-slip patterns on the frame (1) are honeycomb-shaped.

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