Photovoltaic support lightning protection grounding system installation structure containing graphene grounding strip and method

Abstract

The invention relates to photovoltaic construction, in particular to a photovoltaic support lightning protection grounding system installation structure and method comprising a lower stand column, a hoop is arranged on the outer side of the lower stand column, the two ends of the hoop are rotationally connected with a front supporting frame and a rear supporting frame respectively, and the length of the rear supporting frame is larger than that of the front supporting frame; the ends, away from the hoop, of the front supporting frame and the rear supporting frame are provided with support oblique beams, the top end of the lower stand column is rotationally connected with a movable frame, and the support oblique beams are fixedly connected to one side of the movable frame. By replacing traditional galvanized flat steel, the material and construction cost of a photovoltaic support lightning protection grounding system is reduced, the grounding structure of the assembly is optimized, it is ensured that grounding conduction of the whole support and the photovoltaic assembly is reliable, and the design and specification requirements of grounding resistance are met.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic construction, and in particular to an installation structure and method for a photovoltaic support lightning protection grounding system containing a graphene grounding strip. Background Technology

[0002] With the large-scale development of the domestic photovoltaic industry, lightning protection grounding of photovoltaic support systems has become a core guarantee for the safe operation of power plants. Currently, galvanized flat steel is commonly used as the grounding material for photovoltaic support lightning protection grounding, which presents the following key challenges: galvanized flat steel has high procurement costs, requires on-site welding for installation, involves cumbersome procedures, has low work efficiency, and its installation quality relies on manual operation, making standardized control difficult; in mountainous and rocky areas, direct burial of flat steel is difficult, easily posing safety hazards to personnel, while also increasing additional workload and cost; traditional module grounding relies on yellow-green grounding wires to conduct electricity across adjacent module frames, which is prone to grounding failure due to loose wiring, affecting the lightning protection effect.

[0003] To address the aforementioned issues, this invention provides a high-efficiency, low-cost, and complex-scenario-adaptable lightning protection grounding solution for photovoltaic brackets through innovation in grounding materials, design of specialized clamps, and optimization of component grounding structures. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of high cost, low efficiency, poor adaptability, and unstable grounding effect in existing technologies.

[0005] The technical solution of the present invention is as follows: An installation structure for a photovoltaic bracket lightning protection grounding system containing a graphene grounding strip, comprising a lower column, a clamp provided on the outer side of the lower column, a front support frame and a rear support frame respectively rotatably connected to both ends of the clamp, the length of the rear support frame being greater than the length of the front support frame, a bracket inclined beam provided at the end of the front support frame and the rear support frame away from the clamp, a movable frame rotatably connected to the top of the lower column, and the bracket inclined beam fixedly connected to one side of the movable frame.

[0006] Optionally, a crossbeam is provided on one side of the inclined beam of the support, the crossbeam is arranged in a "C" shape, and the number of crossbeams is set to multiple.

[0007] Optionally, a fixing component is fixedly connected to the top of the crossbeam by bolts, and a photovoltaic module is provided on the inner side of the fixing component.

[0008] Optionally, a stainless steel puncture plate is provided at the bottom of the fixing component, and a pressure block is provided on the inner side of the fixing component.

[0009] Optionally, the stainless steel puncture plate includes a central puncture plate and a side puncture plate, both of which have positive and negative punches on their outer sides.

[0010] Optionally, a flat steel clamp is fixedly connected to one side of the inclined beam of the support.

[0011] Optionally, the bottom of the flat steel clamp is fixedly connected to a flat steel base plate by bolts, and a graphene grounding strip is provided between the flat steel clamp and the flat steel base plate.

[0012] Optionally, a fiberglass wedge-shaped clamp is provided on the outer side of the lower column, and the graphene grounding strip is sleeved on the inner side of the fiberglass wedge-shaped clamp.

[0013] Optionally, a clamping plate is provided on the inner side of the fiberglass wedge clamp, and a continuous graphene grounding strip is provided between the fiberglass wedge clamp and the graphene grounding strip.

[0014] This invention also provides an installation method for a photovoltaic support lightning protection grounding system containing a graphene grounding strip, comprising the following steps: Construction of the main grounding grid: Excavate a direct-buried trench along the perimeter of the support, lay graphene grounding strips, and splice them with fiberglass wedge clamps where the length is insufficient. After the lead wire is fitted with a yellow-green sleeve, it is fixed to the inclined beam of the support with a flat steel clamp. Support grounding connection: Measure the distance between adjacent support beams, cut graphene grounding strips of corresponding length, and use flat steel clamps with double bolts to tighten them, ensuring that the overlap length meets the requirements; Photovoltaic module grounding installation: install edge piercing plates on the edge fixed modules, and install middle piercing plates on adjacent photovoltaic modules in the middle. Use the photovoltaic module fixing bolts to press them in place, ensuring that the stainless steel piercing plates protrude and pierce the oxide film on the frame. Resistance test: The overall grounding grid is tested with a grounding resistance tester. If the measured resistance value meets the requirements, the lightning protection grounding effect of the system is up to standard.

[0015] In summary, this application includes at least one of the following beneficial technical effects: This invention effectively reduces usage costs by using graphene grounding strips instead of galvanized flat steel. At the same time, the use of fixed components and flat steel clamps eliminates the need for welding during installation, thereby reducing manual labor and improving work efficiency. The graphene grounding strip's easy bending and laying characteristics make it easy to adapt to complex terrains such as mountains and rocks, avoiding the safety hazards of direct burial of flat steel. Furthermore, the fixing components and flat steel clamps ensure a firm connection of the grounding strip, and the stainless steel piercing discs pierce the oxide film to achieve reliable conductivity between the photovoltaic module and the overall support, significantly reducing the risk of grounding failure. The standardized clamp and piercing disc design reduces differences in manual operation and significantly improves the stability of installation quality.

[0016] In summary, this invention reduces the material and construction costs of photovoltaic bracket lightning protection grounding systems by replacing traditional galvanized flat steel, optimizes the component grounding structure, ensures reliable grounding continuity between the overall bracket and photovoltaic components, and meets the design and specification requirements for grounding resistance. Attached Figure Description

[0017] Figure 1 A schematic diagram of a photovoltaic support lightning protection grounding system containing graphene grounding strips; Figure 2 This is a structural diagram of the fixed component; Figure 3 This is a schematic diagram of the structure of the central puncture patch and the peripheral puncture patch; Figure 4 This is a schematic diagram of the flat steel clamp. Figure 5 This is a schematic diagram of the assembly structure of the fiberglass inclined wedge clamp and clamp pressure plate; Figure 6 This is a three-dimensional structural diagram of a fiberglass wedge-shaped clamp.

[0018] Figure label: 1. Lower column; 2. Clamp; 3. Front support frame; 4. Rear support frame; 5. Movable frame; 6. Support beam; 7. Crossbeam; 8. Fixing components; 9. Flat steel clamp; 10. Graphene grounding strip; 101. Continuing graphene grounding strip; 11. Fiberglass wedge clamp; 12. Photovoltaic module; 13. Stainless steel piercing disc; 131. Center piercing disc; 132. Side piercing disc; 14. Pressure block; 15. Clamping plate; 16. Flat steel base plate; 17. Positive and negative punching. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0021] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example 1: As Figures 1-6 As shown, a photovoltaic bracket lightning protection grounding system installation structure containing graphene grounding strip includes a lower column 1, a clamp 2 is provided on the outer side of the lower column 1, and a front support frame 3 and a rear support frame 4 are rotatably connected to both ends of the clamp 2 respectively. The length of the rear support frame 4 is greater than the length of the front support frame 3. A bracket inclined beam 6 is provided at the end of the front support frame 3 and the rear support frame 4 away from the clamp 2. A movable frame 5 is rotatably connected to the top of the lower column 1. The bracket inclined beam 6 is fixedly connected to one side of the movable frame 5. A crossbeam 7 is provided on one side of the bracket inclined beam 6. The crossbeam 7 is arranged in a "C" shape. The number of crossbeams 7 is set to multiple. The above structure is combined into an integral bracket.

[0025] A fixing component 8 is bolted to the top of the crossbeam 7. A photovoltaic module 12 is installed inside the fixing component 8. A stainless steel piercing plate 13 is installed at the bottom of the fixing component 8. A pressure block 14 is installed inside the fixing component 8. The stainless steel piercing plate 13 includes a central piercing plate 131 and a side piercing plate 132. Both the central piercing plate 131 and the side piercing plate 132 have positive and negative punches 17 on their outer sides. The stainless steel piercing plate 13 is a stainless steel piercing plate. The positive and negative punches 17 form sharp protrusions that can pierce the oxide film on the back panel frame of the module. A flat steel clamp 9 is fixedly connected to one side of the bracket inclined beam 6. Both ends of the flat steel clamp 9 are provided with two A flat steel base plate 16 is fixedly connected to the bottom of the flat steel clamp 9 by bolts. A graphene grounding strip 10 is provided between the flat steel clamp 9 and the flat steel base plate 16. The graphene grounding strip 10 has a specification of 50×5. A fiberglass wedge-type clamp 11 is provided on the outside of the lower column 1. The length of the fiberglass wedge-type clamp 11 is greater than or equal to twice the width of the graphene grounding strip 10. The graphene grounding strip 10 is sleeved on the inside of the fiberglass wedge-type clamp 11. A clamp pressure plate 15 is provided on the inside of the fiberglass wedge-type clamp 11. A continuous graphene grounding strip 101 is provided between the fiberglass wedge-type clamp 11 and the graphene grounding strip 10.

[0026] In this embodiment, the graphene grounding strip 10 has the characteristics of low resistance, corrosion resistance and easy laying, which is significantly better than galvanized flat steel in actual laying process. When the length of the graphene grounding strip 10 is insufficient, the graphene grounding strip 10 can be spliced ​​with the continuous graphene grounding strip 101 to extend the service length. The splicing method is to place the graphene grounding strip 10 and the continuous graphene grounding strip 101 intersecting inside the fiberglass wedge clamp 11, and insert the clamp pressure plate 15 into the inside of the fiberglass wedge clamp 11 to fix the graphene grounding strip 10 and the continuous graphene grounding strip 101 inside the fiberglass wedge clamp 11.

[0027] The graphene grounding strip 10 can be fixed to the bracket inclined beam 6 by using the flat steel clamp 9. By placing the graphene grounding strip 10 between the flat steel clamp 9 and the flat steel base plate 16, and tightening the two bolts connected to the flat steel base plate 16, the graphene grounding strip 10 can be fixed to the flat steel clamp 9. Then, by fixing the two bolts at the end of the flat steel clamp 9 away from the flat steel base plate 16 to the bracket inclined beam 6, the fixed connection between the graphene grounding strip 10 and the bracket inclined beam 6 can be completed.

[0028] The stainless steel piercing plate 13 is divided into two types: the center piercing plate 131 and the side piercing plate 132. The choice is made according to the actual application location. The center piercing plate 131 is used for two adjacent photovoltaic modules 12 in the middle of the overall bracket. The protrusions on both sides simultaneously enable the two photovoltaic modules 12 to conduct electricity to the bracket. The side piercing plate 132 is used for a single photovoltaic module 12 on the side of the overall bracket. Only one side protrusion is used to adapt to the side installation space. The choice is made according to the actual needs and can effectively play a relative role.

[0029] This invention also provides an installation method for a photovoltaic support lightning protection grounding system containing a graphene grounding strip, comprising the following steps: Construction of the main grounding grid: Excavate a direct-buried trench along the perimeter of the support, lay a graphene grounding strip 10, and splice it with fiberglass wedge clamps 11 where the length is insufficient. After the lead wire is fitted with a yellow-green sleeve, it is fixed to the support inclined beam 6 with a flat steel clamp 9. Grounding connection of the bracket: Measure the spacing between the adjacent bracket inclined beams 6, cut the corresponding length of graphene grounding strip 10, and use flat steel clamps 9 with double bolts to tighten it to ensure that the overlap length meets the requirements; Photovoltaic module 12 grounding installation: Side piercing plate 132 is installed on the edge fixed component 8, and middle piercing plate 131 is installed on the middle adjacent photovoltaic module 12. The photovoltaic module 12 fixing bolts are used to press it firmly to ensure that the stainless steel piercing plate 13 protrudes and pierces the oxide film of the frame. Resistance test: The overall grounding grid is tested with a grounding resistance tester. If the measured resistance value meets the requirements, the lightning protection grounding effect of the system is up to standard.

[0030] In this embodiment, the main grounding grid construction technique is as follows: Material selection: 50×5 specification graphene grounding strip 10 is used to replace galvanized flat steel, which has the characteristics of low resistance, corrosion resistance and easy laying. Installation method: The main grounding grid around the photovoltaic system bracket is directly buried, and the excavation depth is in accordance with the design and specification requirements; Connector connection: When the graphene grounding strip 10 is not long enough and needs to be spliced, it is fixed by combining the fiberglass wedge clamp 11 and the clamp pressure plate 15. The length of the fiberglass wedge clamp 11 is ≥ 2 times the length of the graphene grounding strip 10. No on-site welding is required. It can be directly lapped and fixed. Lead wire design: The lead wire of the main grounding grid is laid along the lower column 1. The buried section is connected to the main grounding strip with fiberglass wedge clamp 11. The exposed section is fixed to the support beam 6 with flat steel clamp 9 made of 50×5×6 steel plate. The exposed part of the lead wire is covered with yellow-green grounding sleeve marking to distinguish the grounding system from the support system. The overlap length is ≥ 2 times the width of the graphene grounding strip 10.

[0031] Construction technology of support grounding system (conductivity between supports): Connection method: Adjacent photovoltaic brackets are connected by graphene grounding strip 10 and fastened with flat steel clamps 9 made of flat steel and bolts; Size control: On-site measurement of the spacing between adjacent crossbeams 7 to determine the size of graphene grounding strip 10. The overlap length between graphene grounding strip 10 and crossbeam 7 is ≥ twice the width of graphene grounding strip 10. Fastening requirements: Each end of the flat steel clamp 9 shall be fastened with at least 2 bolts to ensure that the graphene grounding strip 10 is compacted with the crossbeam 7 and to avoid poor contact.

[0032] Photovoltaic module lightning protection grounding technology (core structure: stainless steel puncture plate 13): Puncture blade design: The new stainless steel puncture blade 13 is adopted, with sharp protrusions formed by punching holes on both sides, which can pierce the oxide film of the component back plate frame. Installation location: The stainless steel piercing plate 13 is placed on the joint surface between the back panel frame of the photovoltaic module 12 and the bracket, and is simultaneously fixed using the original fixing bolts of the photovoltaic module 12. Adaptability optimization: Stainless steel puncture plate 13 designed according to component location differences: Side puncture patch 132: Used for a single component on the side of the stent, with a protrusion on only one side to fit the side mounting space; The puncture patch 131 is used for two adjacent components in the middle of the stent. The double-sided protrusions simultaneously enable the two components to communicate with the stent.

[0033] Grounding resistance test verification: After construction is completed, use a resistance tester to check the resistance value of the entire grounding grid to ensure that it is ≤4Ω, which meets the design and specification requirements.

[0034] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A photovoltaic bracket lightning protection grounding system installation structure containing graphene grounding strip, comprising a lower column (1), characterized in that: A clamp (2) is provided on the outside of the lower column (1). The two ends of the clamp (2) are rotatably connected to a front support frame (3) and a rear support frame (4). The length of the rear support frame (4) is greater than the length of the front support frame (3). A support beam (6) is provided at the end of the front support frame (3) and the rear support frame (4) away from the clamp (2). A movable frame (5) is rotatably connected to the top of the lower column (1). The support beam (6) is fixedly connected to one side of the movable frame (5).

2. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 1, characterized in that, A crossbeam (7) is provided on one side of the inclined beam (6) of the support. The crossbeam (7) is arranged in a "C" shape, and the number of crossbeams (7) is set to multiple.

3. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 2, characterized in that, The top of the crossbeam (7) is fixedly connected to a fixing component (8) by bolts, and a photovoltaic module (12) is provided on the inner side of the fixing component (8).

4. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 3, characterized in that, The bottom of the fixing component (8) is provided with a stainless steel puncture plate (13), and the inner side of the fixing component (8) is provided with a pressure block (14).

5. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 4, characterized in that, The stainless steel puncture plate (13) includes a central puncture plate (131) and a side puncture plate (32), and both the central puncture plate (131) and the side puncture plate (132) have positive and negative punch holes (17) on their outer sides.

6. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 1, characterized in that, A flat steel clamp (9) is fixedly connected to one side of the inclined beam (6) of the support.

7. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 6, characterized in that, The bottom of the flat steel clamp (9) is fixedly connected to a flat steel base plate (16) by bolts, and a graphene grounding strip (10) is provided between the flat steel clamp (9) and the flat steel base plate (16).

8. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 7, characterized in that, A fiberglass wedge clamp (11) is provided on the outside of the lower column (1), and the graphene grounding strip (10) is sleeved on the inside of the fiberglass wedge clamp (11).

9. The installation structure of a photovoltaic bracket lightning protection grounding system with graphene grounding strip according to claim 8, characterized in that, The inner side of the fiberglass wedge clamp (11) is provided with a clamping plate (15), and a continuous graphene grounding strip (101) is provided between the fiberglass wedge clamp (11) and the graphene grounding strip (10).

10. A method for installing a photovoltaic bracket lightning protection grounding system containing a graphene grounding strip, applied to the installation structure of the photovoltaic bracket lightning protection grounding system containing a graphene grounding strip according to claim 1, characterized in that, Includes the following steps: Construction of the main grounding grid: Excavate a direct-buried trench along the periphery of the support, lay a graphene grounding strip (10), and splice it with fiberglass wedge clamps (11) where the length is insufficient. After the lead wire is fitted with a yellow-green sleeve, it is fixed to the support inclined beam (6) with a flat steel clamp (9). Grounding connection of the bracket: Measure the distance between the adjacent bracket inclined beams (6), cut the corresponding length of graphene grounding strip (10), and use flat steel clamps (9) to fasten with double bolts to ensure that the overlap length meets the requirements; Photovoltaic module (12) grounding installation: The edge fixing component (8) is installed with the edge piercing plate (132), and the middle adjacent photovoltaic module (12) is installed with the middle piercing plate (131). The photovoltaic module (12) fixing bolts are used to press it in place to ensure that the stainless steel piercing plate (13) protrudes and pierces the oxide film of the frame. Resistance test: The overall grounding grid is tested with a grounding resistance tester. If the measured resistance value meets the requirements, the lightning protection grounding effect of the system is up to standard.

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