Photovoltaic support lightning protection grounding system and construction method thereof

Abstract

The invention relates to the technical field of building construction, in particular to a photovoltaic support lightning protection grounding system and a construction method thereof, and the system comprises a main grounding grid and a plurality of photovoltaic supports; the main grounding grid is buried and laid on the periphery of a photovoltaic support installation area, the main grounding grid is formed by connecting a plurality of graphene grounding strips through a first connecting clamp, and the main grounding grid is connected with a plurality of grounding strip leading-up wires through the first connecting clamp. The plurality of photovoltaic supports are respectively installed in the photovoltaic support installation area through stand columns, each photovoltaic support and the main grounding grid are connected together through a grounding belt leading-up wire, and the grounding belt leading-up wire is fixed on the photovoltaic support through a second connection clamp; each photovoltaic support is fixedly provided with a photovoltaic assembly, and a stainless steel puncture sheet is arranged between the photovoltaic assembly and the photovoltaic support. Lightning protection and grounding installation of the photovoltaic support can be efficiently, rapidly and conveniently achieved, and the lightning protection and grounding effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a photovoltaic support lightning protection grounding system and a construction method thereof. Background Art

[0002] With the continuous development and expansion of the photovoltaic industry in China, the photovoltaic support structure design technology has become relatively mature, the project design cost has been relatively clear, and the profit margin is small. The grounding of the photovoltaic power station support system is a prerequisite for the safe operation of the power station. The typical photovoltaic support lightning protection grounding system often uses galvanized flat steel as the grounding material. All support columns need to be connected through the grounding flat steel. Due to the influence of geomorphology and geology, some photovoltaic projects are difficult to bury the grounding flat steel in the rock area, which affects the safety of the operators, increases the workload and cost investment, and has the disadvantages of high construction cost, relatively cumbersome installation difficulty, low operation efficiency, and the installation quality cannot be guaranteed.

[0003] In order to solve the current situation of inconvenient installation, high cost and low operating efficiency caused by lightning protection grounding of photovoltaic brackets, the present invention proposes a lightning protection grounding system for photovoltaic brackets and a construction method thereof. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention provides a photovoltaic support lightning protection grounding system and a construction method thereof to solve the problems of high cost and difficulty in lightning protection grounding of photovoltaic supports in the prior art.

[0005] A photovoltaic support lightning protection grounding system, comprising: a main grounding grid and a plurality of photovoltaic supports;

[0006] The main grounding grid is buried and laid on the periphery of the photovoltaic bracket installation area. The main grounding grid is formed by connecting multiple graphene grounding strips, and adjacent graphene grounding strips are connected by a first connecting clamp. The main grounding grid is connected to multiple grounding strip lead-in wires through the first connecting clamp. The first connecting clamp includes a clamp body and a clamp pressure plate. The clamp body is a square cylinder. An opening arranged along the length direction of the square cylinder is opened in the middle of the top plate of the square cylinder, and the width of the opening is smaller than the width of the top plate of the square cylinder. The clamp pressure plate is detachably assembled in the clamp body.

[0007] A plurality of photovoltaic brackets are respectively installed in the photovoltaic bracket installation area through columns, and each photovoltaic bracket and the main grounding grid are connected together through the grounding belt lead-in wire, and the grounding belt lead-in wire is fixed to the photovoltaic bracket through a second connecting fixture, and the second connecting fixture includes a Z-shaped steel plate and a clamping steel plate, and the Z-shaped steel plate includes an upper steel plate, a lower steel plate and a connecting plate connected between the upper steel plate and the lower steel plate, and the grounding belt lead-in wire is fixed between the lower steel plate and the clamping steel plate by bolts, and the upper steel plate is fixed to the photovoltaic bracket by bolts;

[0008] A photovoltaic component is fixedly arranged on each photovoltaic support, and a stainless steel puncture sheet is arranged between the photovoltaic component and the photovoltaic support.

[0009] In some of the embodiments, the photovoltaic support includes a support oblique beam and a support cross beam fixed on the support oblique beam.

[0010] In some of the embodiments, the grounding strap lead is fixed to the support diagonal beam of the photovoltaic support through the second connecting clamp.

[0011] In some embodiments, the length of the first connecting clamp is not less than twice the width of the graphene grounding strip.

[0012] In some embodiments, the stainless steel puncture sheet is provided with a plurality of puncture holes, and both the front and back surfaces of the stainless steel puncture sheet have burrs.

[0013] In addition, the present invention also discloses a photovoltaic support lightning protection grounding construction method, the method comprising the following steps:

[0014] A plurality of first connecting clamps and a plurality of second connecting clamps are provided, wherein the first connecting clamps include a clamp body and a clamp pressing plate, wherein the clamp body is a square cylinder, wherein an opening arranged along the length direction of the square cylinder is provided in the middle of the top plate of the square cylinder, and the width of the opening is smaller than the width of the top plate of the square cylinder, and the clamp pressing plate is detachably assembled in the clamp body; the second connecting clamps include a Z-shaped steel plate and a clamping steel plate, wherein the Z-shaped steel plate includes an upper steel plate, a lower steel plate and a connecting plate connected between the upper steel plate and the lower steel plate;

[0015] A main grounding grid is laid in a direct burial manner at the periphery of the photovoltaic bracket installation area, wherein the main grounding grid is formed by connecting a plurality of graphene grounding strips, adjacent graphene grounding strips are connected by a first connecting fixture, and the main grounding grid is connected to a plurality of grounding strip lead-in wires through the first connecting fixture;

[0016] Installing a photovoltaic bracket in the photovoltaic bracket installation area, the photovoltaic bracket comprising a bracket oblique beam and a bracket cross beam fixed on the bracket oblique beam, and the photovoltaic bracket is installed on the ground through a column;

[0017] The grounding strap lead-up wire is led up along the column and then fixed to the support diagonal beam of the photovoltaic support through the second connecting clamp;

[0018] The photovoltaic assembly is fixed on the photovoltaic support, and a stainless steel puncture sheet is arranged between the photovoltaic assembly and the photovoltaic support.

[0019] In some embodiments, the length of the first connecting clamp is not less than twice the width of the graphene grounding strip.

[0020] In some of the embodiments, the Z-shaped steel plate and the clamping steel plate of the second connecting clamp are both provided with bolt holes, the grounding strap lead-in wire is fixed between the lower steel plate and the clamping steel plate by bolts, and the upper steel plate is fixed on the lower surface of the inclined beam of the photovoltaic support.

[0021] In some embodiments, the stainless steel puncture sheet is provided with a plurality of puncture holes, and both the front and back surfaces of the stainless steel puncture sheet have burrs.

[0022] In some of the embodiments, a yellow-green grounding sleeve is used to mark the portion of the grounding strap lead exposed to the ground.

[0023] Compared with the prior art, the present invention has at least one of the following advantages or beneficial effects:

[0024] 1. The present invention makes design innovations for typical photovoltaic bracket lightning protection and grounding systems, optimizes the installation process, improves installation quality and operating efficiency, reduces safety hazards, reduces construction difficulty, reduces workload and cost investment, and achieves the purpose of reducing costs and increasing efficiency. It can efficiently, quickly and conveniently realize the installation of photovoltaic bracket lightning protection and grounding, achieve lightning protection and grounding effects, and ensure that the grounding effect is good and the grounding resistance meets the design and specification requirements.

[0025] 2. The photovoltaic module and the photovoltaic bracket of the present invention are connected by stainless steel puncture plates, and the back panel frame of the photovoltaic module and the steel structure of the photovoltaic bracket are fully connected by the stainless steel puncture plates, so as to achieve a good lightning protection and grounding effect.

[0026] 3. The present invention is simple to implement and efficient in operation. It can ensure that the resistance value of the grounding network of the lightning protection grounding system meets the design requirements, avoid the risk of mountain photovoltaic power stations being easily struck by lightning, and achieve the role of lightning protection during the power supply process, thereby achieving the purpose of safe power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0028] Figure 1 This is a schematic diagram of the structure of the photovoltaic support lightning protection grounding system in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the application structure of the first connecting fixture in an embodiment of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the clamp body in the embodiment of the present invention

[0031] Figure 4 is a schematic diagram of the application of the second connecting fixture in an embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the structure of the Z-shaped steel plate in an embodiment of the present invention;

[0033] Figure 6 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0034] Figure 7 It is a top view of the mid-puncture slice;

[0035] Figure 8 It is a top view of the edge puncture slice;

[0036] In the figure: 1 is the main grounding grid; 11 is the first graphene grounding strip; 12 is the graphene grounding strip; 2 is the grounding strip lead-in wire; 3 is the lower column; 4 is the upper column; 5 is the bracket diagonal beam; 6 is the bracket cross beam; 7 is the photovoltaic module; 8 is the first connecting clamp; 81 is the clamp body; 82 is the clamp pressure plate; 9 is the second connecting clamp; 91 is the Z-shaped steel plate; 92 is the clamping steel plate; 10 is the stainless steel barb; 13 is the pressing block. DETAILED DESCRIPTION

[0037] The present invention is further described below with reference to the accompanying drawings and specific embodiments, but is not intended to be limiting of the present invention:

[0038] Embodiment 1:

[0039] like Figures 1 to 8As shown, this embodiment discloses a photovoltaic support lightning protection grounding system. Specifically, the photovoltaic support lightning protection grounding system includes: a main grounding grid 1 and a plurality of photovoltaic supports; the main grounding grid 1 is buried and laid outside the photovoltaic support installation area, and the main grounding grid 1 is formed by connecting a plurality of graphene grounding strips, and adjacent graphene grounding strips are connected by a first connecting clamp 8; Figure 2 The schematic diagram shows that the first graphene grounding strip 11 and the second graphene grounding strip 12 are connected through the first connecting fixture 8. The main grounding grid 1 is connected to a plurality of grounding strip lead-in wires 2 through the first connecting fixture 8. The first connecting fixture 8 includes a fixture body 81 and a fixture pressing plate 82. The fixture body 81 is a square cylinder. An opening arranged along the length direction of the square cylinder is opened in the middle of the top plate of the square cylinder, and the width of the opening is smaller than the width of the top plate of the square cylinder. The fixture pressing plate 82 of the first connecting fixture 8 can be detachably assembled on the fixture body. Two graphene grounding strips or a graphene grounding strip and a grounding strip lead-in wire 2 are pressed and fixed together; multiple photovoltaic brackets are respectively installed in the photovoltaic bracket installation area through columns, and the column includes a lower column 3 and an upper column 4 connected to the lower column 3 by bolts. The photovoltaic bracket includes a bracket inclined beam 5 and a bracket cross beam 6 fixed on the bracket inclined beam 5, and the bracket inclined beam 5 of each photovoltaic bracket and the main grounding grid 1 are connected together through the grounding strip lead-in wire 2, and the grounding strip lead-in wire 2 is fixed to the support of the photovoltaic bracket through a second connecting clamp 9. On the inclined beam 5, the second connecting fixture 9 includes a Z-shaped steel plate 91 and a clamping steel plate 92, the Z-shaped steel plate 91 includes an upper steel plate, a lower steel plate and a connecting plate connected between the upper steel plate and the lower steel plate, the grounding belt lead-in wire 2 is fixed between the lower steel plate and the clamping steel plate 92 by bolts, and the upper steel plate is fixed to the inclined beam 5 of the photovoltaic bracket by bolts; each photovoltaic bracket is fixedly provided with a photovoltaic module 7, and a stainless steel puncture sheet 10 is provided between the photovoltaic module 7 and the bracket cross beam 6 of the photovoltaic bracket, and the stainless steel puncture sheet 10 is provided between the photovoltaic module 7 and the bracket cross beam 6 of the photovoltaic bracket. The sheet 10 is provided with a plurality of puncture holes (i.e. holes formed by puncture, and burrs are formed on the outer edges of such holes), and both the front and back surfaces of the stainless steel puncture sheet 10 have burrs, so that when the photovoltaic component 7 and the stainless steel puncture sheet 10 are pressed and fixed together by the pressing block 13, the burrs will pierce the oxide film of the back panel frame of the photovoltaic component 7, thereby connecting the photovoltaic component 7 with the photovoltaic bracket, and since both the front and back surfaces of the stainless steel puncture sheet 10 have burrs, the front and back surfaces can be installed arbitrarily during installation, thereby improving the installation efficiency.

[0040] In this embodiment, the design of the above-mentioned stainless steel puncture piece 10 can be flexibly designed according to the combination of the photovoltaic component 7 and the contact surface of the photovoltaic bracket. The puncture piece of the photovoltaic component 7 at the edge of the same group of brackets is designed as a side puncture piece for use by a photovoltaic component 7 at the edge; the puncture piece of the two adjacent photovoltaic components 7 in the middle can be designed as a middle puncture piece for common use by the two adjacent photovoltaic components 7 in the middle.

[0041] In an embodiment of the present invention, the length of the first connecting fixture 8 is not less than twice the width of the graphene grounding strap. Specifically, the size of the graphene grounding strap and the grounding strap lead 2 are both 50*5, and in this embodiment, the grounding strap lead 2 is also the same graphene grounding strap as the graphene grounding strap of the main grounding grid.

[0042] Embodiment 2:

[0043] The invention discloses a photovoltaic support lightning protection grounding construction method, the method comprising the following steps:

[0044] Step S1, providing a plurality of first connecting clamps and a plurality of second connecting clamps, the first connecting clamps comprising a clamp body and a clamp pressure plate, the clamp body being a square cylinder, an opening arranged along the length direction of the square cylinder is opened in the middle of the top plate of the square cylinder, and the width of the opening is smaller than the width of the top plate of the square cylinder, and the clamp pressure plate can be detachably assembled in the clamp body; the second connecting clamp comprises a Z-shaped steel plate and a clamping steel plate, the Z-shaped steel plate comprising an upper steel plate, a lower steel plate and a connecting plate connected between the upper steel plate and the lower steel plate.

[0045] Step S2, laying the main grounding grid in the periphery of the photovoltaic support installation area by direct burial, and the excavation depth is implemented according to the design and specification requirements; the main grounding grid is connected by multiple graphene grounding strips (because the main grounding grid is long, it needs to be connected by multiple graphene grounding strips), and adjacent graphene grounding strips are connected by a first connecting clamp, and the main grounding grid is connected to multiple grounding strip lead-in wires through the first connecting clamp; the peripheral photovoltaic support steel structure needs to be connected and fixed to the support inclined beam through the grounding strip lead-in wire, and the buried part of the grounding strip lead-in wire is connected to the graphene grounding strip of the main grounding grid by the first connecting clamp, that is, the graphene grounding strips of the main grounding grid and the grounding strip lead-in wire and the graphene grounding strip of the main grounding grid are clamped and connected by the first connecting clamp; and the length of the first connecting clamp is not less than 2 times the width of the graphene grounding strip. During installation, the heads of the two graphene grounding strips are directly fixed by the first connecting clamp, thereby avoiding the operation of on-site welding of traditional flat steel, reducing the installation workload and improving the installation efficiency.

[0046] Step S3, installing a photovoltaic bracket in the photovoltaic bracket installation area, the photovoltaic bracket including a bracket diagonal beam and a bracket cross beam fixed on the bracket diagonal beam, and the photovoltaic bracket is installed on the ground through a column.

[0047] Step S4, the grounding strap lead-up wire is led up along the column and then fixed to the support diagonal beam of the photovoltaic support through the second connecting fixture. The Z-shaped steel plate and the clamping steel plate of the second connecting fixture are both provided with bolt holes, the grounding strap lead-up wire is fixed between the lower steel plate and the clamping steel plate by bolts, and the upper steel plate is fixed to the lower surface of the support diagonal beam of the photovoltaic support by bolts.

[0048] The second connection fixture is made of 50*5*6 steel plate, and the overlap length between the grounding strip lead and the second connection fixture is not less than 2 times the width of the grounding strip lead. The exposed part of the grounding strip lead is marked with a yellow-green grounding sleeve to clearly distinguish the grounding system from the bracket system.

[0049] In this embodiment, the grounding system between the above-mentioned photovoltaic brackets is realized by connecting the bracket diagonal beams of two adjacent photovoltaic brackets using a grounding strap lead-in wire, and the connection method adopts a second connecting clamp made of flat steel to connect with bolts; specifically, the distance between the adjacent bracket beams is measured on-site to determine the size of the connecting grounding strap lead-in wire, and the lap length of the grounding strap lead-in wire and the second connecting clamp is not less than 2 times the width of the grounding strap lead-in wire; when the grounding strap lead-in wire is connected to the photovoltaic bracket through the second connecting clamp by bolts, each end of the second connecting clamp is required to be tightened with at least two bolts to ensure that the connection between the grounding strap lead-in wire and the bracket diagonal beam is compacted.

[0050] Step S5, fixing the photovoltaic assembly on the photovoltaic bracket, and providing a stainless steel puncture sheet between the photovoltaic assembly and the photovoltaic bracket; the stainless steel puncture sheet is provided with a plurality of puncture holes, and both the front and back sides of the stainless steel puncture sheet have burrs.

[0051] In this embodiment, a new type of stainless steel puncture sheet is used for grounding the photovoltaic module. The stainless steel puncture sheet is installed between the photovoltaic module back panel frame and the bracket cross beam. The front and back sides of the stainless steel puncture sheet are punched. After punching, there are raised burr parts on both sides, and the raised parts form sharp corners. The puncture sheet is installed at the joint surface of the photovoltaic module and the bracket cross beam, and is fixed by the fixing bolts of the photovoltaic module. After installation, the raised part of the stainless steel puncture sheet will pierce the oxide film of the photovoltaic module back panel frame, so as to achieve the effect of connecting the photovoltaic module and the photovoltaic bracket steel structure by the puncture sheet, so as to achieve the purpose of conducting the photovoltaic module frame through the puncture sheet and the bracket steel structure, thereby realizing the grounding of the photovoltaic module. And the design of the stainless steel puncture sheet can be flexibly designed according to the combination of the photovoltaic module and the photovoltaic bracket contact surface. The puncture sheet of the photovoltaic module at the edge of the same group of brackets is designed as a side puncture sheet for use by a photovoltaic module at the edge; the puncture sheet of the two adjacent photovoltaic modules in the middle can be designed as a middle puncture sheet for use by the two adjacent photovoltaic modules in the middle.

[0052] The photovoltaic support lightning protection grounding construction method disclosed in the present invention mainly uses graphene grounding strips for underground laying, and uses a connection clamp to connect the graphene grounding strips with the support steel structure to form a peripheral grounding main ring network, and adjacent photovoltaic supports are connected by graphene grounding strips to achieve the effect of connecting the entire support with the main grounding network. The use of this method ensures the integrity of the photovoltaic support grounding system and meets the requirements.

[0053] It should be noted that, after the construction is completed, the present invention also uses a resistance tester to detect the grounding resistance value of the entire grounding grid. If the grounding resistance value is not greater than 4Ω, the requirement is met.

[0054] It is not difficult to find that the second embodiment of the present invention is a method embodiment corresponding to the embodiment of the above-mentioned photovoltaic bracket lightning protection and grounding system. This embodiment can be implemented in conjunction with the embodiment of the above-mentioned photovoltaic bracket lightning protection and grounding system. The relevant technical details mentioned in the embodiment of the above-mentioned photovoltaic bracket lightning protection and grounding system are still valid in this embodiment. In order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the embodiment of the above-mentioned photovoltaic bracket lightning protection and grounding system.

[0055] Those skilled in the art should understand that those skilled in the art can implement variations by combining the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0056] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A photovoltaic support lightning protection grounding system, characterized in that: include: Main grounding grid and multiple photovoltaic racks; The main grounding grid is buried and laid on the periphery of the photovoltaic bracket installation area. The main grounding grid is formed by connecting multiple graphene grounding strips, and adjacent graphene grounding strips are connected by a first connecting clamp. The main grounding grid is connected to multiple grounding strip lead-in wires through the first connecting clamp. The first connecting clamp includes a clamp body and a clamp pressure plate. The clamp body is a square cylinder. An opening arranged along the length direction of the square cylinder is opened in the middle of the top plate of the square cylinder, and the width of the opening is smaller than the width of the top plate of the square cylinder. The clamp pressure plate is detachably assembled in the clamp body. A plurality of photovoltaic brackets are respectively installed in the photovoltaic bracket installation area through columns, and each photovoltaic bracket and the main grounding grid are connected together through the grounding belt lead-in wire, and the grounding belt lead-in wire is fixed to the photovoltaic bracket through a second connecting fixture, and the second connecting fixture includes a Z-shaped steel plate and a clamping steel plate, and the Z-shaped steel plate includes an upper steel plate, a lower steel plate and a connecting plate connected between the upper steel plate and the lower steel plate, and the grounding belt lead-in wire is fixed between the lower steel plate and the clamping steel plate by bolts, and the upper steel plate is fixed to the photovoltaic bracket by bolts; A photovoltaic component is fixedly arranged on each photovoltaic support, and a stainless steel puncture sheet is arranged between the photovoltaic component and the photovoltaic support.

2. The photovoltaic support lightning protection grounding system according to claim 1, characterized in that: The photovoltaic support comprises a support oblique beam and a support cross beam fixed on the support oblique beam.

3. The photovoltaic support lightning protection grounding system according to claim 2, characterized in that: The grounding strap lead-up wire is fixed to the support diagonal beam of the photovoltaic support through the second connecting clamp.

4. The photovoltaic support lightning protection grounding system according to claim 1, characterized in that: The length of the first connecting clamp is not less than twice the width of the graphene grounding strip.

5. The photovoltaic support lightning protection grounding system according to claim 1, characterized in that: The stainless steel puncture sheet is provided with a plurality of puncture holes, and both the front and back surfaces of the stainless steel puncture sheet have burrs.

6. A photovoltaic support lightning protection grounding construction method, characterized in that: The method comprises the following steps: A plurality of first connecting clamps and a plurality of second connecting clamps are provided, wherein the first connecting clamps include a clamp body and a clamp pressing plate, wherein the clamp body is a square cylinder, wherein an opening arranged along the length direction of the square cylinder is provided in the middle of the top plate of the square cylinder, and the width of the opening is smaller than the width of the top plate of the square cylinder, and the clamp pressing plate is detachably assembled in the clamp body; the second connecting clamps include a Z-shaped steel plate and a clamping steel plate, wherein the Z-shaped steel plate includes an upper steel plate, a lower steel plate and a connecting plate connected between the upper steel plate and the lower steel plate; A main grounding grid is laid in a direct burial manner at the periphery of the photovoltaic bracket installation area, wherein the main grounding grid is formed by connecting a plurality of graphene grounding strips, adjacent graphene grounding strips are connected by a first connecting fixture, and the main grounding grid is connected to a plurality of grounding strip lead-in wires through the first connecting fixture; Installing a photovoltaic bracket in the photovoltaic bracket installation area, the photovoltaic bracket comprising a bracket oblique beam and a bracket cross beam fixed on the bracket oblique beam, and the photovoltaic bracket is installed on the ground through a column; The grounding strap lead-up wire is led up along the column and then fixed on the support diagonal beam of the photovoltaic support through the second connecting clamp; The photovoltaic assembly is fixed on the photovoltaic support, and a stainless steel puncture sheet is arranged between the photovoltaic assembly and the photovoltaic support.

7. The photovoltaic support lightning protection grounding construction method according to claim 6, characterized in that: The length of the first connecting clamp is not less than twice the width of the graphene grounding strip.

8. The photovoltaic support lightning protection grounding construction method according to claim 6, characterized in that: The Z-shaped steel plate and the clamping steel plate of the second connecting clamp are both provided with bolt holes, the grounding strap lead-in wire is fixed between the lower steel plate and the clamping steel plate by bolts, and the upper steel plate is fixed on the lower surface of the inclined beam of the photovoltaic bracket.

9. The photovoltaic support lightning protection grounding construction method according to claim 6, characterized in that: The stainless steel puncture sheet is provided with a plurality of puncture holes, and both the front and back surfaces of the stainless steel puncture sheet have burrs.

10. The photovoltaic support lightning protection and grounding construction method according to claim 6, characterized in that: The portion of the grounding strap lead exposed to the ground is marked with a yellow-green grounding sleeve.

Images