Photovoltaic module load testing device

Abstract

The utility model belongs to the technical field of load testing, and discloses a photovoltaic module load testing device. The photovoltaic module load testing device comprises a load testing platform, a supporting platform and a pressure equalizing air cushion, the load testing platform is used for bearing a photovoltaic module, the supporting platform is arranged above the load testing platform, and a liftable pressure applying water bag is arranged on the supporting platform and used for being laid on the photovoltaic module and covering the front face or the back face of the photovoltaic module. And the pressure equalizing air cushion is positioned between the pressure applying water bag and the photovoltaic module. A photovoltaic module is placed on a load test platform, a pressure-equalizing air cushion is laid on the photovoltaic module, a pressure-applying water bag descends and completely presses the pressure-equalizing air cushion, and the pressure-equalizing air cushion covers the front surface or the back surface of the photovoltaic module, so that pressure can be uniformly transmitted to the surface of the photovoltaic module, and the influence of non-uniform pressure on test accuracy is avoided; the load value can be conveniently adjusted by adjusting the weight of the pressure applying water bag, the pressure applying water bag does not need to be repeatedly replaced, and the test efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of load testing technology, and in particular to a photovoltaic module load testing device. Background Technology

[0002] Photovoltaic module load testing refers to the method of testing the performance and stability of photovoltaic modules under different mechanical loads. This test can verify the photovoltaic modules' ability to withstand different mechanical loads, thereby evaluating their performance and stability to ensure their reliability and durability in long-term use.

[0003] In existing technologies, two types of equipment are typically used to test photovoltaic modules. One is an automatic sand load machine, which uses sandbags of different weights to achieve different load combinations, but the frequent replacement of sandbags to adjust the load value leads to low testing efficiency. The other is a suction cup static load tester, which uses suction cups to apply pressure to the photovoltaic modules, but uneven pressure application affects the accuracy of the test.

[0004] In other words, existing photovoltaic module load testing methods have drawbacks such as the inconvenience of changing sandbags to adjust the load value, which reduces testing efficiency, and uneven pressure from suction cups affecting testing accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a photovoltaic module load testing device that allows for convenient and efficient adjustment of load values ​​to improve testing efficiency and ensures uniform pressure application to improve testing accuracy.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a photovoltaic module load testing device, which includes:

[0008] A load testing platform for supporting photovoltaic modules;

[0009] A support platform is set above the load test platform, and the support platform is equipped with a liftable pressure water bag;

[0010] An equalizing air cushion is used to lay on the photovoltaic module and cover the front or back of the photovoltaic module, and the equalizing air cushion is located between the pressure-applying water bag and the photovoltaic module.

[0011] As an optional technical solution for a photovoltaic module load testing device, the load testing platform includes a flipping table and a frame. The flipping table is rotatably mounted on the frame and is used to support and drive the photovoltaic module to flip.

[0012] As an optional technical solution for a photovoltaic module load testing device, the flipping table includes a flipping frame and two fixing members disposed on the flipping frame. The flipping frame is rotatably connected to the frame, and the two fixing members are used to support and fix the photovoltaic module. The two fixing members can move closer to or further away from each other.

[0013] As an optional technical solution for a photovoltaic module load testing device, the flipping table further includes a support spindle and a locking component. The support spindle is connected to the flipping frame, and the fixing component is slidably connected to the support spindle along the axial direction of the support spindle and fixed to the support spindle by the locking component.

[0014] As an optional technical solution for a photovoltaic module load testing device, it also includes a fastener for passing through the photovoltaic module and connecting to the fixing member.

[0015] As an optional technical solution for a photovoltaic module load testing device, the pressure water bag includes one or more water bags, each of which can be lifted and suspended on the support platform.

[0016] As an optional technical solution for a photovoltaic module load testing device, it also includes a connecting pipe, through which the pressurized water bag is suspended on the support platform, and the connecting pipe is retractable.

[0017] As an optional technical solution for a photovoltaic module load testing device, it also includes a water supply device, wherein a water pipe is provided inside the connecting pipe, and the water pipe connects the water supply device and the pressurized water bag.

[0018] As an optional technical solution for a photovoltaic module load testing device, the support platform is equipped with a slide rail, and the pressure water bag is suspended on the slide rail and can slide along the slide rail.

[0019] As an optional technical solution for a photovoltaic module load testing device, the slide rail extends along a first direction and is slidably disposed on the support platform along a second direction.

[0020] Beneficial effects:

[0021] This invention provides a photovoltaic module load testing device, which includes a load testing platform, a support platform, and a pressure equalizing air cushion. The load testing platform supports the photovoltaic module, and the support platform is positioned above it. A liftable pressure-applying water bag is mounted on the support platform and placed on the photovoltaic module to cover its front or back. The pressure equalizing air cushion is located between the water bag and the photovoltaic module. By placing the photovoltaic module on the load testing platform and then placing the pressure equalizing air cushion on it, the water bag descends and completely presses against the air cushion. Because the air cushion covers the front or back of the photovoltaic module, the pressure is evenly distributed across the module surface, preventing uneven pressure from affecting test accuracy. The load value can be easily adjusted by changing the weight of the water bag, eliminating the need for repeated replacements and improving testing efficiency. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the load testing platform provided in this embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the pressure equalization air cushion provided in this embodiment of the utility model;

[0024] Figure 3 These are structural schematic diagrams of different specifications of pressure water bags provided in embodiments of this utility model;

[0025] Figure 4 This is a partial structural schematic diagram of the photovoltaic module load testing device provided in this embodiment of the utility model. Figure 1 ;

[0026] Figure 5 This is a partial structural schematic diagram of the support platform provided in an embodiment of the present utility model;

[0027] Figure 6 This is a partial structural schematic diagram of the photovoltaic module load testing device provided in this embodiment of the utility model. Figure 2 .

[0028] In the picture:

[0029] 11. Frame; 12. Flip frame; 13. Support spindle; 14. Fixture; 141. Mounting hole;

[0030] 21. Support platform; 22. Slide rail; 23. Pressure water bag; 231. Water inlet; 24. Connecting pipe;

[0031] 30. Pressure equalizing air cushion; 31. Inflation port;

[0032] A. Photovoltaic modules. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Load testing of photovoltaic (PV) modules typically requires simulating their operating environment, such as snow load and wind load. Snow load refers to the pressure exerted by snow on the top of the PV module, while wind load refers to the pressure exerted by wind on the bottom of the PV module. In load testing, sand pressure is commonly used to simulate snow or wind conditions. This involves converting the test load into the weight of sand, packaging the sand in bags, and piling them on the front or back of the PV module to simulate the pressure exerted by snow or wind.

[0038] In existing technologies, automatic sand load testing machines typically suspend five layers of sandbags. The top four layers generally provide a load of 1200Pa, while the bottom layer provides a load of 100Pa to 900Pa. Different load combinations are achieved by configuring sandbags of different weights. Since different photovoltaic modules and different installation methods correspond to different load values, it is necessary to frequently change sandbags of different weights to adjust the load value during load testing. This operation is cumbersome and time-consuming, greatly affecting testing efficiency. Suction cup static load testing machines use circular suction cups to apply pressure, but the pressure is uneven and the equipment is prone to overshoot (meaning the actual pressure exceeds the test load by 400Pa to 800Pa). For photovoltaic modules with test loads below 2000Pa, overshoot can easily lead to photovoltaic module failure and explosion. The accuracy of the test results is lower than that of sand load testing.

[0039] like Figures 1 to 6 As shown, this embodiment provides a photovoltaic module load testing device, which includes a load testing platform, a support platform 21, and a pressure equalizing air cushion 30. The load testing platform is used to support the photovoltaic module. The support platform 21 is set above the load testing platform. The support platform 21 is provided with a liftable pressure water bag 23, which is used to lay on the photovoltaic module and cover the front or back of the photovoltaic module. The pressure equalizing air cushion 30 is located between the pressure water bag 23 and the photovoltaic module.

[0040] By placing the photovoltaic module on the load test platform and laying the pressure equalizing air cushion 30 on the photovoltaic module, the pressure water bag 23 is lowered and completely pressed on the pressure equalizing air cushion 30. Since the pressure equalizing air cushion 30 covers the front or back of the photovoltaic module, the pressure can be evenly transmitted to the surface of the photovoltaic module, avoiding uneven pressure from affecting the test accuracy. The load value can be easily adjusted by adjusting the weight of the pressure water bag 23, without the need to repeatedly replace the pressure water bag 23, which helps to improve the test efficiency.

[0041] To test the front and back of photovoltaic modules, the load testing platform includes a flipping table and a frame 11. The flipping table is rotatably mounted on the frame 11 and is used to support and rotate the photovoltaic module. By rotating the flipping table on the frame 11 and controlling it to rotate the photovoltaic module, the front and back tests can be completed without disassembling and reinstalling the photovoltaic module, making the operation convenient and saving testing time. Specifically: with the front of the photovoltaic module facing up, after testing the front of the photovoltaic module, the pressure water bag 23 is raised to a certain height, separating the pressure water bag 23 from the pressure equalizing air cushion 30. The pressure equalizing air cushion 30 is then removed from the front of the photovoltaic module. The flipping table is then rotated so that the back of the photovoltaic module faces up, and the pressure equalizing air cushion 30 is re-laid on the back of the photovoltaic module to continue testing the back of the photovoltaic module.

[0042] Specifically, taking photovoltaic module A as an example, the flipping platform includes a flipping frame 12 and two fixing members 14 disposed on the flipping frame 12. The flipping frame 12 is rotatably connected to the frame 11. The two fixing members 14 are used to support and fix the photovoltaic module A, and the two fixing members 14 can move closer to or further away from each other. By setting two fixing members 14 on the flipping frame 12, the two fixing members 14 can move closer to or further away from each other, thereby adjusting the distance between the two fixing members 14 to accommodate photovoltaic modules A of different sizes and improve applicability.

[0043] Optionally, the photovoltaic module load testing device also includes fasteners for passing through the photovoltaic module A and connecting to the fixing member 14. The photovoltaic module A can be detachably fixed by using fasteners, ensuring a secure and simple operation.

[0044] Optionally, the flipping table also includes a support spindle 13 and a locking element. The support spindle 13 is connected to the flipping frame 12, and the fixing element 14 is slidably connected to the support spindle 13 along the axial direction of the support spindle 13 and fixed to the support spindle 13 by the locking element. The support spindle 13 is set on the flipping frame 12, and the fixing element 14 is fixed to the support spindle 13 by the locking element. When the locking element is not locked, the fixing element 14 can move along the axial direction of the support spindle 13 to adjust the distance between the two fixing elements 14. When the locking element is locked, the fixing element 14 is fixed to the support spindle 13. The front and back of the photovoltaic module A are exposed from both sides of the flipping frame 12. When the flipping frame 12 flips, it can drive the support spindle 13, the fixing element 14 and the photovoltaic module A to flip together.

[0045] In this embodiment, the locking element is a clamp, and the fixing element 14 is a purlin. The fixing element 14 has mounting holes 141, and the fastener is a bolt. The photovoltaic module A is fixed at the mounting holes 141 using bolts. The fixing element 14 is detachably mounted on the main shaft 13 of the bracket via the clamp. During installation, the photovoltaic module A is first fixed to the two fixing elements 14, and then the locking element is used to fix the fixing element 14 and the photovoltaic module A together to the main shaft 13 of the bracket.

[0046] Optionally, the equalizing air cushion 30 is provided with an inflation port 31. By providing the inflation port 31, air can be inflated and deflated. The equalizing air cushion 30 is placed between the photovoltaic module A and the pressure water bag 23, which can evenly distribute the weight of the pressure water bag 23 on the surface of the photovoltaic module A, thereby improving the accuracy of load testing.

[0047] In this embodiment, the pressure equalizing air cushion 30 is rectangular; the pressure equalizing air cushion 30 is equipped with various specifications to match the A-type photovoltaic module, such as 1722mm×1134mm, 1762mm×1134mm, 1903mm×1134mm, 2278mm×1134mm, 2382mm×1134mm, 2465mm×1134mm, 2384mm×1303mm, etc.

[0048] Furthermore, the support platform 21 is equipped with a slide rail 22, and the pressure water bag 23 is suspended on the slide rail 22 and can slide along the slide rail 22. By adjusting the position of the slide rail 22, the position of the pressure water bag 23 is adjusted to ensure that the pressure water bag 23 is exactly above the photovoltaic module A, so as to achieve uniform pressure testing.

[0049] In this embodiment, the top of the support platform 21 is provided with multiple slide rails 22 arranged side by side at intervals for suspending the pressure water bag 23 at different positions; the extension direction of the slide rail 22 is parallel to the extension direction of the main shaft 13 of the support.

[0050] Optionally, the slide rail 22 extends along a first direction and is slidably disposed on the support platform 21 along a second direction. In this embodiment, the first direction is the width direction of the photovoltaic module A, and the second direction is the length direction of the photovoltaic module A; both the slide rail 22 and the main shaft 13 of the bracket extend along the first direction, and the two ends of the slide rail 22 are slidably connected to the support platform 21, so that the position of the slide rail 22 is adjustable, thereby improving the flexibility of the arrangement of the pressure water bag 23.

[0051] Understandably, after the front test of photovoltaic module A is completed, the control flipping table is flipped so that the back of photovoltaic module A faces upward. At this time, the main shaft 13 of the bracket is above photovoltaic module A. The position of the slide rail 22 can be adjusted or the position of the pressure water bag 23 can be adjusted using the slide rail 22 so that the pressure water bag 23 will not press down on the main shaft 13 of the bracket and avoid the position of the main shaft 13 of the bracket, ensuring that all pressure water bags 23 act on the pressure equalizing air cushion 30.

[0052] In this embodiment, since the fixing member 14 is fixed to the main shaft 13 of the bracket by a clamp, and the photovoltaic module A is fixed to the fixing member 14, a certain distance is left between the photovoltaic module A and the main shaft 13 of the bracket. When the back of the photovoltaic module A is facing up, it is inconvenient to set up the pressure water bag 23 for hoisting at the position of the main shaft 13 of the bracket. The pressure water bag 23 can be manually added between the main shaft 13 of the bracket and the back of the photovoltaic module A as needed.

[0053] Optionally, the photovoltaic module load testing device also includes a connecting pipe 24. A pressure water bag 23 is suspended from the slide rail 22 of the support platform 21 via the connecting pipe 24. The connecting pipe 24 is telescopic. The photovoltaic module load testing device also includes a water supply device. A water pipe is installed inside the connecting pipe 24, connecting the water supply device and the pressure water bag 23. By setting the telescopic connecting pipe 24, the setting height of the pressure water bag 23 can be adjusted by adjusting the length of the connecting pipe 24. After the pressure water bag 23 is counterweighted, its height is adjusted to lower until it is completely pressed onto the pressure equalizing air cushion 30, and the test can begin. The slide rail 22 is connected to the pressure water bag 23 via the connecting pipe 24. A water pipe is installed inside the connecting pipe 24, connecting the water supply device and the pressure water bag 23. The weight of the water in the pressure water bag 23 can be adjusted via the water pipe. Optionally, the connecting pipe 24 is a steel flexible hose.

[0054] In other embodiments, a steel wire rope with a hook can be used to suspend the pressure water bag 23, and a separate water pipe can be installed to supply water to the pressure water bag 23.

[0055] Optionally, the pressure water bag 23 includes one or more water bags, each of which can be raised and lowered on the support platform 21. By setting one or more water bags of different specifications, it is easy to combine them to accommodate photovoltaic modules A of different sizes. In this embodiment, each water bag is suspended on the support platform 21 through a connecting pipe 24; each water bag can be supplied with water by a separate water pipe; each water bag is provided with a water inlet 231, and the water bag is connected to the connecting pipe 24 through the water inlet 231.

[0056] During load testing, an equalizing air cushion 30 is first laid on photovoltaic module A. Then, water bags of different sizes are placed on the equalizing air cushion 30. Different sizes of water bag combinations can be used for photovoltaic modules A of different specifications, thus adapting to multiple photovoltaic modules A. By adjusting the weight inside the water bags, the load value can be switched conveniently and efficiently, greatly improving testing efficiency and accuracy.

[0057] The water bag is made of waterproof cloth (tarpaulin), which has good toughness and softness. The water bag applies pressure to the photovoltaic module A by the weight of the water inside. Due to the fluidity of the water and the pressure equalization effect of the pressure equalization air cushion 30, pressure can be applied to the photovoltaic module A evenly, improving the accuracy of the load test.

[0058] The following is a detailed description of the installation and usage process of the photovoltaic module load testing device:

[0059] First, fix the bracket main shaft 13 on the flipping table, initially install the fastener 14 on the bracket main shaft 13, adjust the distance between the two fasteners 14 so that the mounting holes 141 on the two fasteners 14 can be aligned with the holes of the photovoltaic module A, then tighten the clamp to fix the fastener 14 on the bracket main shaft 13, and then use bolts to fix the photovoltaic module A on the two fasteners 14 (at this time, the front of the photovoltaic module is facing up); then, lay the pressure equalizing air cushion 30 on the photovoltaic module A to ensure that the pressure equalizing air cushion 30 covers the surface of the photovoltaic module A.

[0060] Next, according to the design of photovoltaic module A, the pressure water bag 23 is matched to ensure that the pressure water bag 23 can cover the surface of photovoltaic module A. The weight of the pressure water bag 23 required is calculated according to the test load, and the total weight of the pressure water bag 23 is adjusted to complete the load value setting. The position of the pressure water bag 23 can be changed by adjusting the position of the slide rail 22 so that the pressure water bag 23 is located directly above the photovoltaic module A.

[0061] Start the photovoltaic module load testing device and lower the pressure water bag 23 until it completely presses down on the photovoltaic module A and the pressure equalizing air pad 30. Then, start the load test on the front of the photovoltaic module A for 1 hour. Lift the pressure water bag 23 away from the photovoltaic module A and the pressure equalizing air pad 30, remove the pressure equalizing air pad 30, and use the flipping table to flip the photovoltaic module A (so that the back of the photovoltaic module A is facing up). Readjust the load value and press down to conduct the load test on the back side for 1 hour. The front and back of the photovoltaic module A need to be tested alternately. After repeating the above steps 3 times, the load test of the photovoltaic module A is completed.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A photovoltaic module load testing device, characterized in that, include: A load testing platform for supporting photovoltaic modules; A support platform (21) is set above the load test platform, and a pressurized water bag (23) that can be raised and lowered is provided on the support platform (21); An equalizing air cushion (30) is used to be laid on the photovoltaic module and cover the front or back of the photovoltaic module. The equalizing air cushion (30) is located between the pressure water bag (23) and the photovoltaic module.

2. The photovoltaic module load testing device according to claim 1, characterized in that, The load testing platform includes a flipping table and a frame (11). The flipping table is rotatably mounted on the frame (11) and is used to support and drive the photovoltaic module to flip.

3. The photovoltaic module load testing device according to claim 2, characterized in that, The flipping platform includes a flipping frame (12) and two fixing members (14) disposed on the flipping frame (12). The flipping frame (12) is rotatably connected to the frame (11). The two fixing members (14) are used to support and fix the photovoltaic module. The two fixing members (14) can move closer to or further away from each other.

4. The photovoltaic module load testing device according to claim 3, characterized in that, The flipping table also includes a support spindle (13) and a locking member. The support spindle (13) is connected to the flipping frame (12). The fixing member (14) is slidably connected to the support spindle (13) along the axial direction of the support spindle (13) and is fixed to the support spindle (13) by the locking member.

5. The photovoltaic module load testing device according to claim 3, characterized in that, It also includes fasteners for passing through the photovoltaic module and connecting to the fastener (14).

6. The photovoltaic module load testing device according to claim 1, characterized in that, The pressure water bag (23) includes one or more water bags, each of which can be lifted and suspended on the support platform (21).

7. The photovoltaic module load testing device according to claim 1, characterized in that, It also includes a connecting pipe (24), through which the pressurized water bag (23) is suspended on the support platform (21), and the connecting pipe (24) is telescopic.

8. The photovoltaic module load testing device according to claim 7, characterized in that, It also includes a water supply device, and the connecting pipe (24) has a water pipe inside, which connects the water supply device and the pressurized water bag (23).

9. The photovoltaic module load testing device according to claim 1, characterized in that, The support platform (21) is provided with a slide rail (22), and the pressure water bag (23) is suspended on the slide rail (22) and can slide along the slide rail (22).

10. The photovoltaic module load testing device according to claim 9, characterized in that, The slide rail (22) extends along a first direction and is slidably disposed on the support platform (21) along a second direction.

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