Photovoltaic composite frame and preparation method thereof

Abstract

The invention relates to the technical field of photovoltaic equipment, in particular to a photovoltaic composite frame and a preparation method thereof.The photovoltaic composite frame comprises a frame body, a mounting groove used for mounting a photovoltaic module is formed in the frame body, the frame body is defined by two transverse frames and two longitudinal frames, and the adjacent frames are fixed through connecting pieces; the upper end face and the lower end face of the connecting piece are flush with the upper end face and the lower end face of the frame body respectively, and anti-skid lines are arranged on the upper end face and the lower end face of the frame body respectively. The connecting piece for connecting the adjacent frames is arranged between the adjacent frames, and the upper end of the connecting piece is flush with the upper end face and the lower end face of the frame body, so that fixation can be performed without forming screw holes, and low friction force caused by small contact area due to forming of the screw holes is avoided; by arranging the anti-skid lines on the upper and lower end faces of the frame bodies, the friction force between the upper and lower frame bodies can be increased, and the phenomenon of slipping during transportation is avoided.

Description

Technical Field

[0001] The 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 part 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 of the existing photovoltaic frames are made of composite materials.

[0003] Composite frames are often made of resin and glass fiber. In order to resist aging from natural factors such as climate and sunlight, 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 installation of the frames of photovoltaic modules, most of them are placed on temporary platforms such as pallets in a stacked manner and wait for the next circulation. The circulation is generally carried out by means of transportation such as forklifts. The starting and stopping operations during the circulation are accompanied by inertia, which may cause the upper photovoltaic modules to slip and displace. If the inertia is large, it will cause a large displacement and even a safety accident.

[0004] The reason why the friction between the upper and lower frames is small is that the adjacent frames are mostly fixed by screws, so a certain number of screw holes will be 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 surface of the upper and lower frames is too smooth and easy to slip. Therefore, it is urgent to solve the safety problem caused by slipping of photovoltaic modules due to smooth end faces.

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

[0006] Technical issues 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 problem that the photovoltaic components in the prior art have safety issues due to 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, comprising a frame body, wherein the frame body is provided with a mounting groove for installing a photovoltaic module, the frame body is enclosed by two transverse frames and two longitudinal frames, adjacent frames are fixed to each other by connecting pieces, and the upper and lower end surfaces of the connecting pieces are respectively kept flush with the upper and lower end surfaces of the frame body, and anti-slip patterns are respectively provided on the upper and lower end surfaces of the frame body.

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

[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 connecting member is provided with a fixing pile corresponding to two adjacent frames, which can be plugged and matched with the adjacent frames.

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

[0016] Furthermore, the connecting member includes a bracket body and a guide slide rod, and the two fixing 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 felt on the substrate, and open a groove on the surface of the glass felt 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 that is the same as 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 a mounting groove on the finished photovoltaic composite frame.

[0025] Beneficial Effects

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

[0027] The present invention provides a connecting piece for connecting adjacent frames between adjacent frames, and allows the upper end of the connecting piece to be flush with the upper and lower end surfaces of the frame body, so that the fixing can be performed without 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-skid 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] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

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

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

[0034] Figure 5 This is a 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 structure of a connecting piece in an embodiment of the present invention;

[0036] Figure 7 It is a schematic diagram of a side cross-sectional structure of a connecting member structure in an embodiment of the present invention (the sink groove on the connecting member and the frame structure remain flush with each other);

[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 misaligned state).

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

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0040] The present invention will be further described below in conjunction with 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 mounting 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 symmetrically distributed longitudinal frames 13. The two sides of each transverse frame 12 are respectively connected to a longitudinal frame 13, and adjacent frames are fixed to each other by connecting members 2. Specifically, the connecting member 2 in this solution serves to connect two adjacent frames.

[0046] It is important to emphasize that the frame 1 in the present solution is transported in a stacked manner, i.e. the layers are accumulated layer by layer. Since the upper and lower end faces of the connector 2 in the present embodiment are on the same contact surface with the frame 1 and no screw holes are provided, 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 avoiding 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 pattern in this embodiment is not limited. In the present application, the anti-slip pattern on the frame 1 is in a honeycomb shape.

[0050] In this embodiment, the connecting member 2 is provided with a fixing pile 21 which can be plugged into and matched with the adjacent frames at the positions corresponding to the two 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 sleeved 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 close fit with a small gap. During assembly, in addition to aligning the guide groove 261, a certain force is also required to allow the fixing pile 21 to be smoothly inserted into the guide groove 261.

[0051] More specifically, in the present 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 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 and matched with 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 penetrate the side ends of the connecting member 2, that is, during transportation, the limit block 23 and the groove 22 can be matched. While the anti-slip texture is used to increase the friction between the upper and lower frames, a certain binding capacity can also be provided in the diagonal direction of the frame 1. Since the upper end of the connecting member 2 in the present 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 limit block 23 as a whole 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, the groove 22 is located at the upper end of the guide slide bar 25, and a through hole is provided at the middle position of the bracket body 24, the guide slide bar 25 is inserted into the through hole, and a return spring 251 is sleeved under the upper end of the through hole and the groove 22 of 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 is lowered, 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 the present embodiment, a recessed cavity 221 is formed on one side of the notch of the sink 22, and a block 252 is provided at the upper end of the guide slide 25 which can extend toward the recessed portion of the sink 22, and the recess 22 is provided above the 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 recess 22 on the block 252 is already below the notch of the sink 22. At this time, the block 252 can be pushed toward one side of the engaging cavity 221 to ensure that the block 252 is inserted into the engaging cavity 221, thereby locking the guide slide 25 at its current position.

[0054] If the original state is to be restored, the block 252 is separated from the engagement 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 felt on the substrate, and open a groove on the surface of the glass felt 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, roller-embossed composite frame samples produced by different manufacturers are 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 inside the workshop does not exceed 5KM / h. When the circulation starts at this speed, the frame modules with roller embossing and 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, among the component trays 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 second stacked component is approximately 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 the present case also includes a counterweight block, which is detachably matched with 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 to the glass fiber composite board with the honeycomb pattern 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 test instrument, the maximum static friction is often a fixed value, while the dynamic friction changes in real time during the test. Therefore, the maximum static friction is taken as the data required for the test. As a comparison group, the un-rolled embossed composite frame with the same parameters can be cut for testing. The number of tests for each frame is not 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 test of the 2nd to 5th photovoltaic modules is similar to the above method, the difference lies in the selection of the quality of the counterweight.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 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); adjacent frames are fixed to each other via connecting pieces (2); upper and lower end surfaces of the connecting pieces (2) are respectively kept flush with 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).

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

3. A 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. A photovoltaic composite frame according to claim 1, characterized in that: The anti-slip pattern on the frame (1) is in a honeycomb shape.

5. The photovoltaic composite frame according to claim 1, characterized in that: The connection piece (2) is provided with a fixing pile (21) at each of two adjacent frames, which can be plugged into and matched with the adjacent frames.

6. A photovoltaic composite frame according to claim 5, characterized in that: The upper end of the connecting piece (2) is provided with a groove (22), and the lower end of the connecting piece (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 piece (2) of the upper frame (1) and the groove (22) at the upper end of the connecting piece (2) of the lower frame (1) are plugged and matched.

7. The method for preparing a photovoltaic composite frame according to claim 6, characterized in that: The connecting member (2) comprises: A bracket body (24), wherein the two fixing piles (21) are respectively located on two sides of the bracket body (24); A 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).

8. A method for preparing a photovoltaic composite frame, used for preparing a photovoltaic composite frame as claimed in any one of claims 1 to 7, characterized in that: The steps include: Step 1: Add glass felt on the substrate, and open a groove on the surface of the glass felt for placing the polyurethane resin material; Step 2: Add polyurethane resin material into the tank and place the substrate into the mold for heating; 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; Step 4: Cut the substrate obtained in step 3 into a horizontal frame (12) and a vertical frame (13) according to a preset size ratio; Step 5: After the transverse frame (12) and the longitudinal frame (13) are assembled to form a photovoltaic composite frame, the frame is placed on a friction coefficient tester to test the friction coefficient.

9. A method for preparing a photovoltaic composite frame according to claim 8, characterized in that: The friction coefficient tester includes a base plate and a glass fiber composite board placed on the base plate, the upper end surface of the glass fiber composite board is provided with a pattern that is the same as the anti-slip pattern on the finished photovoltaic composite frame, and 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.

10. A method for preparing a photovoltaic composite frame according to claim 9, characterized in that: It also comprises a counterweight block, which is detachably matched with the mounting groove (11) on the finished photovoltaic composite frame.

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