Photovoltaic panel fixing device and construction method

Abstract

The application discloses a photovoltaic panel fixing device and a construction method, and relates to the technical field of photovoltaic facilities. The photovoltaic panel fixing device comprises a photovoltaic panel mounting platform and a plurality of fixing piles, the plurality of fixing piles are arranged at intervals and are connected with the photovoltaic panel mounting platform respectively, the fixing pile comprises a shell and a double-syringe grouting element, the double-syringe grouting element is arranged in the shell, the double-syringe grouting element comprises a first grouting pipeline, a second grouting pipeline and a mixer, the first grouting pipeline and the second grouting pipeline are communicated with the mixer respectively, the mixer is provided with a first grout outlet, a second grout outlet is formed in the side of the shell away from the photovoltaic panel mounting platform, and the first grout outlet and the second grout outlet are communicated. The photovoltaic panel fixing device provided by the application can mix two kinds of grout, the strength of the stone body generated by solidification is high, the stratum condition is improved, the photovoltaic panel fixing device can be better applied to loose sandy scenes, and good applicability is achieved for extreme weather such as storm.

Description

Technical Field

[0001] This application relates to the field of photovoltaic facility technology, and in particular to a photovoltaic panel fixing device and construction method. Background Technology

[0002] Photovoltaic panels are typically installed in arrays on the ground, covering a large area. During power generation, they continuously shade the ground surface. This shading alters the surface's light conditions, causing native vegetation to suffer stunted growth or even die due to insufficient sunlight.

[0003] The root network of vegetation plays a vital role in stabilizing soil and preventing soil erosion in the natural environment. When vegetation growth is inhibited, the surface soil loses its original root protection, making it susceptible to seepage and erosion under the influence of rainfall or surface runoff. This phenomenon not only damages the local ecological environment but also threatens the infrastructure of photovoltaic power stations, especially the stability of photovoltaic piles.

[0004] In existing technologies, photovoltaic piles have poor durability in long-term soil erosion environments, resulting in a significant reduction in reinforcement effectiveness. Summary of the Invention

[0005] In view of this, this application provides a photovoltaic panel fixing device and a construction method for the photovoltaic panel fixing device, with the aim of solving one of the technical problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, this application provides a photovoltaic panel fixing device, including:

[0008] Photovoltaic panel installation platform;

[0009] Multiple fixed piles are spaced apart and connected to the photovoltaic panel installation platform. Each fixed pile includes a shell and a dual-grouting component. The dual-grouting component is located inside the shell and includes a first grouting pipe, a second grouting pipe, and a mixer. The first grouting pipe and the second grouting pipe are respectively connected to the mixer. The mixer has a first grout outlet. A second grout outlet is opened on the side of the shell away from the photovoltaic panel installation platform. The first grout outlet and the second grout outlet are connected.

[0010] In an optional embodiment, the housing includes a first hollow section and a second hollow section, the first hollow section being in communication with the second hollow section, and the cross-sectional area of ​​the second hollow section gradually decreasing in the direction away from the photovoltaic panel mounting platform.

[0011] In an optional embodiment, the first hollow section has a first connecting hole and a second connecting hole spaced apart. The first grouting pipe passes through the first connecting hole, so that the port of the first grouting pipe is exposed on the outside of the first hollow section. The second grouting pipe passes through the second connecting hole, so that the port of the second grouting pipe is exposed on the outside of the first hollow section.

[0012] In an optional embodiment, the fixing pile further includes a cap connected to the side of the first hollow section away from the second hollow section.

[0013] In an optional embodiment, the photovoltaic panel mounting platform includes a fixing member, and the cover is detachably connected to the fixing member.

[0014] In an optional embodiment, the photovoltaic panel mounting platform further includes multiple support members, which are spaced apart along a first direction. The ends of the multiple support members are respectively connected to the fixing members. There are two fixing members, which are spaced apart along a second direction. The first direction and the second direction are perpendicular.

[0015] In an optional embodiment, the support member is a flexible tie rod; the fixing member is made of steel.

[0016] Secondly, this application provides a construction method for the photovoltaic panel fixing device described in any of the foregoing embodiments, comprising:

[0017] Site survey and location;

[0018] Drilling and pre-embedding of the fixed pile shell;

[0019] Two-component grouting construction;

[0020] Photovoltaic panel installation platform and photovoltaic panel installation.

[0021] In an optional implementation, in the two-component grouting construction, the first grout is a cement grout and the second grout is a sodium silicate solution.

[0022] In an optional embodiment, the water-cement ratio of the cement slurry is 5:1 to 1:1.

[0023] Compared to existing technologies, the beneficial effects of this application are as follows: This application proposes a photovoltaic panel fixing device, including a photovoltaic panel installation platform and multiple fixing piles. The multiple fixing piles are spaced apart and connected to the photovoltaic panel installation platform respectively. Each fixing pile includes a shell and a dual-grouting component. The dual-grouting component is disposed within the shell and includes a first grouting pipe, a second grouting pipe, and a mixer. The first grouting pipe and the second grouting pipe are respectively connected to the mixer. The mixer has a first grout outlet. A second grout outlet is opened on the side of the shell away from the photovoltaic panel installation platform. The first grout outlet and the second grout outlet are connected. By mixing the two grouts in the first and second grouting pipes, the solidified stone body has high strength, improves the geological conditions, and enhances the adhesion between the shell and the soil layer. It has strong pull-out resistance, flexural strength, and overturning resistance, making it more suitable for loose sandy environments and exhibiting good applicability to extreme weather conditions such as storms. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 The following are schematic diagrams of the photovoltaic panel fixing device in some embodiments of this application;

[0026] Figure 2 The following are schematic diagrams of the structure of the fixed piles in some embodiments of this application;

[0027] Figure 3 The following are schematic diagrams of the structure of the dual-slurry grouting component in some embodiments of this application;

[0028] Figure 4 A construction flowchart of the photovoltaic panel fixing device in some embodiments of this application is shown.

[0029] Key component symbols: 100 - Photovoltaic panel fixing device; 110 - Photovoltaic panel installation platform; 111 - Fixing component; 112 - Support component; 120 - Fixing pile; 121 - Shell; 1211 - First hollow section; 1212 - Second hollow section; 122 - Double grouting component; 1221 - First grouting pipeline; 1222 - Second grouting pipeline; 1223 - Mixer; 12231 - First grout outlet; 12121 - Second grout outlet; 12111 - First connecting hole; 12112 - Second connecting hole; 123 - Cover; D1 - First direction; D2 - Second direction; D3 - Third direction. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In existing technologies, photovoltaic piles exhibit poor durability in environments with long-term soil erosion. For example, helical piles rely solely on physical friction for fixation, making them unsuitable for loose sandy environments. Furthermore, photovoltaic piles have only been tested for single-liquid grouting without a pumping design, resulting in poor soil durability after single-liquid reinforcement and low grout retention after seepage and erosion, further hindering their suitability for loose sandy environments.

[0036] In response to the above problems, such as Figure 1 As shown, an embodiment of this application provides a photovoltaic panel fixing device 100, mainly used for installing photovoltaic panels, especially suitable for installing photovoltaic panels in environments with loose soil. The photovoltaic panel fixing device 100 includes a photovoltaic panel mounting platform 110 and a plurality of fixing piles 120.

[0037] Multiple fixed piles 120 are spaced apart and connected to the photovoltaic panel installation platform 110. Each fixed pile 120 includes a housing 121 and a double-grouting component 122. The double-grouting component 122 is located inside the housing 121 and includes a first grouting pipe 1221, a second grouting pipe 1222, and a mixer 1223. The first grouting pipe 1221 and the second grouting pipe 1222 are respectively connected to the mixer 1223. The mixer 1223 is provided with a first grout outlet 12231. A second grout outlet 12121 is provided on the side of the housing 121 away from the photovoltaic panel installation platform 110. The first grout outlet 12231 and the second grout outlet 12121 are connected.

[0038] See also Figure 2 and Figure 3 The first grouting pipe 1221 and the second grouting pipe 1222 pump different types of grout respectively. The mixture of the two grouts usually has the effects of rapid setting and early strength, which can achieve rapid reinforcement of the stratum. At the same time, due to the rapid setting characteristics, the two grouts need to be pumped separately and then mixed. By mixing the two grouts in the first grouting pipe 1221 and the second grouting pipe 1222, the mixture is injected into the soil and solidifies rapidly. The resulting stone body has high strength, improves the stratum conditions, makes the shell 121 have good adhesion to the soil layer, and has strong pull-out resistance, flexural resistance, and overturning resistance, making it more suitable for loose sandy scenarios.

[0039] In addition, after the mixed grout is injected into the soil, the soil will solidify and produce a certain degree of impermeability, making it suitable for extreme weather such as storms.

[0040] Mixer 1223 can adjust the mixing ratio of the two slurries in real time, allowing them to fully react in the formation. Mixer 1223 models include: Lightnin, Cheminer, Kenics, Sulzer SMX, Eductors, or VenturiInjectors.

[0041] Both the first grouting pipeline 1221 and the second grouting pipeline 1222 are equipped with valves. An external intelligent control system automatically adjusts the valves based on on-site monitoring data to change the injection pressure and flow rate of the grout. The valve models are Globe Ball Valve, Swagelok Ball Valve, API 600 Gate Valve, DIN Gate Valve, API 602 Globe Valve, or ASME B16.34 Globe Valve.

[0042] In some embodiments, the housing 121 includes a first hollow section 1211 and a second hollow section 1212.

[0043] like Figure 2 As shown, the first hollow section 1211 is connected to the second hollow section 1212. In the direction away from the photovoltaic panel mounting platform 110, the cross-sectional area of ​​the second hollow section 1212 gradually decreases.

[0044] The first hollow section 1211 is cylindrical, and the second hollow section 1212 is conical. The second hollow section 1212 is located at the bottom of the first hollow section 1211, and its conical structure facilitates insertion into the soil layer.

[0045] In one embodiment, the housing 121 is a seamless round steel tube, the first hollow section 1211 has a diameter of 273 mm (10 inches), and the second hollow section 1212 is a welded conical steel seal. The entire housing 121 is made of DH420 high-strength steel. DH420 high-strength steel is a high-strength steel typically used in applications requiring high stress and high loads.

[0046] In some embodiments, the first hollow section 1211 has a spaced first connecting hole 12111 and a second connecting hole 12112.

[0047] See also Figure 2 and Figure 3 The first grouting pipe 1221 is inserted through the first connecting hole 12111, so that the port of the first grouting pipe 1221 is exposed on the outside of the first hollow section 1211, which facilitates the connection of the first grouting pipe 1221 with the external grout pumping device.

[0048] The second grouting pipe 1222 is inserted through the second connecting hole 12112, so that the port of the second grouting pipe 1222 is exposed on the outside of the first hollow section 1211, which facilitates the connection of the second grouting pipe 1222 with the external grout pumping device.

[0049] In one embodiment, the first grouting pipe 1221 delivers ordinary silicate cement grout, and the second grouting pipe 1222 delivers sodium silicate grout. The two are mixed in a 1:1 ratio and can solidify and generate strength within 40-70 seconds after mixing.

[0050] In some embodiments, the anchor pile 120 further includes a cap 123.

[0051] like Figure 2 As shown, the cover 123 is connected to the side of the first hollow section 1211 away from the second hollow section 1212.

[0052] The cover 123 is used to reduce rainwater seepage into the housing 121 and prevent damage to the dual-slurry injection component 122. The cover 123 is connected to the housing 121 by welding or threading.

[0053] In some embodiments, the photovoltaic panel mounting platform 110 includes a fastener 111, and the cover 123 is detachably connected to the fastener 111.

[0054] In one embodiment, such as Figure 2 As shown, the cover 123 has two spaced end connecting pieces on the side away from the second hollow section 1212. Each end connecting piece has a through hole, and the central axes of the through holes on the two end connecting pieces coincide. Correspondingly, the fastener 111 has an intermediate connecting piece on the side closer to the cover 123, and the intermediate connecting piece also has a through hole. When the cover 123 and the fastener 111 are connected, the intermediate connecting piece is located between the two end connecting pieces, and the central axes of all the through holes coincide. Thus, bolts are inserted through the through holes of the end connecting pieces and the intermediate connecting piece to connect the fastener 111 and the cover 123. Nuts are screwed into the ends of the bolts to reinforce the connection structure between the fastener 111 and the cover 123.

[0055] In some embodiments, the photovoltaic panel mounting platform 110 further includes a support member 112.

[0056] Support member 112 is used to support the photovoltaic panel. For example... Figure 1 As shown, both the support member 112 and the fixing member 111 are strip-shaped. There are multiple support members 112, which are distributed at intervals along the first direction D1. The ends of the multiple support members 112 are connected to the fixing members 111 respectively. There are two fixing members 111, which are distributed at intervals along the second direction D2.

[0057] It should be noted that the first direction D1 is the extension direction of the fastener 111, the second direction D2 is the extension direction of the support 112, and the third direction D3 is the extension direction of the first hollow section 1211. The first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other.

[0058] In some embodiments, the support member 112 is a flexible tie rod. The flexible tie rod will undergo a certain bending deformation when subjected to external force, and will recover its shape after the external force is removed. The support member 112 is made of glass fiber tie rod, steel wire rope tie rod, fiber-reinforced composite material tie rod, or synthetic fiber tie rod.

[0059] In some embodiments, the fastener 111 is made of steel. For example, the fastener 111 is supported by DH420 high-strength steel plate.

[0060] like Figure 1 and Figure 4 As shown, the construction method of the photovoltaic panel fixing device 100 according to any of the foregoing embodiments provided in this application includes:

[0061] Step S10: Site survey and location.

[0062] Specifically, ground-penetrating radar or borehole sampling methods are used to analyze the soil structure, moisture content, and bearing capacity of the construction area to determine the distribution range of special geological features such as sandy strata and water-rich silt. Based on the survey results, the length of the 120mm fixed piles (recommended pile length ≥ 5m) and the grouting volume (0.7 times the reinforcement range or design requirements) are adjusted.

[0063] Using a total station or GPS positioning system, the pile positions are marked according to the design drawings, ensuring a horizontal spacing of 0.6m and a lateral spacing of 1.7m. Every 6 pile positions form a honeycomb array to optimize load distribution.

[0064] Step S20: Drilling and pre-embedding the housing 121 of the fixed pile 120.

[0065] Specifically, a rotary drilling rig or impact drill is used to drill the hole, with the hole diameter 20mm larger than the outer diameter of the fixed pile 120, and the hole depth reaching the design elevation. After drilling, the residue at the bottom of the hole is cleaned to ensure the integrity of the hole wall and prevent hole collapse. The housing 121 of the fixed pile 120 is vertically inserted into the hole, with the conical bottom of the second hollow section 1212 contacting the bottom of the hole.

[0066] Use a level to correct the verticality of the shell 121 (deviation ≤1%), temporarily fix it, and then backfill with a small amount of crushed stone to stabilize the pile position.

[0067] Step S30: Two-component grouting construction.

[0068] Specifically, the first and second grouts are connected to independent pumping pipelines to avoid contact before mixing. The ends of the pipelines are connected to the mixer 1223 at the bottom of the fixed pile 120. The mixer 1223 is a mechanical agitator with built-in spiral blades to accelerate the uniform mixing of the grouts. Simultaneous grouting with dual pumps is initiated, with the grouting volume calculated as 0.7 times the borehole volume or adjusted according to design requirements.

[0069] In addition, for special geological treatments:

[0070] For sandy strata: increase the grouting volume to 0.9 times the pore volume and add 0.5% polypropylene fiber to the grout to improve crack resistance.

[0071] For water-rich silt layers: pre-buried permeable pipes are used to divert groundwater, and vacuum drainage is used after grouting to accelerate the hardening of the stone body.

[0072] Real-time monitoring of grouting pressure and flow rate; if pressure suddenly rises, grouting is suspended to investigate pipeline blockage or geological anomalies. The grout sets rapidly after mixing, reaching its design strength (≥15MPa) within 30 minutes, forming a high-strength stone body.

[0073] Step S40: Photovoltaic panel installation platform 110 and photovoltaic panel installation.

[0074] Specifically, the cap 123 at the top of the fixed pile 120 is bolted to the fastener 111 made of DH420 high-strength steel plate, and the bolt torque is applied according to the design requirements. The two fasteners 111 are tensioned and fixed together by a flexible glass fiber tie rod (20mm in diameter), with a tension force ≥5kN, to enhance lateral stability.

[0075] The photovoltaic panel array is laid on the photovoltaic panel installation platform and fixed with aluminum alloy clamps to ensure uniform spacing between the panels (≥10mm recommended) to avoid thermal expansion deformation.

[0076] In some embodiments, the first grout is a cement grout, and the second grout is a sodium silicate solution.

[0077] In some embodiments, the water-cement ratio of the cement slurry is 5:1 to 1:1. The water-cement ratio of the cement slurry is 5:1, 4:1, 3:1, 2:1, 1:1, etc., and is not limited to the ratios in the examples.

[0078] In one embodiment, two liquids are pumped into the fixed pile 120: cement grout (e.g., 1:1) and sodium silicate solution (preferably Baumé 35, modulus 2.4). Cement is mainly composed of silicates such as dicalcium silicate (CaSiO) and tricalcium silicate (CaSiO). Water glass reacts rapidly with calcium hydroxide produced by the hydration of tricalcium silicate to form hydrated calcium silicate. The rapid formation of hydrated calcium silicate causes the grout to solidify quickly, resulting in high strength.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A photovoltaic panel fixing device, characterized in that, include: Photovoltaic panel installation platform; Multiple fixed piles are spaced apart and connected to the photovoltaic panel installation platform. Each fixed pile includes a shell and a dual-grouting component. The dual-grouting component is located inside the shell and includes a first grouting pipe, a second grouting pipe, and a mixer. The first grouting pipe and the second grouting pipe are respectively connected to the mixer. The mixer has a first grout outlet. A second grout outlet is opened on the side of the shell away from the photovoltaic panel installation platform. The first grout outlet and the second grout outlet are connected.

2. The photovoltaic panel fixing device according to claim 1, characterized in that, The housing includes a first hollow section and a second hollow section, the first hollow section being connected to the second hollow section, and the cross-sectional area of ​​the second hollow section gradually decreasing in the direction away from the photovoltaic panel mounting platform.

3. The photovoltaic panel fixing device according to claim 2, characterized in that, The first hollow section has a first connecting hole and a second connecting hole spaced apart. The first grouting pipe passes through the first connecting hole, so that the port of the first grouting pipe is exposed on the outside of the first hollow section. The second grouting pipe passes through the second connecting hole, so that the port of the second grouting pipe is exposed on the outside of the first hollow section.

4. The photovoltaic panel fixing device according to claim 2, characterized in that, The fixed pile also includes a cap, which is connected to the side of the first hollow section away from the second hollow section.

5. The photovoltaic panel fixing device according to claim 4, characterized in that, The photovoltaic panel installation platform includes a fixing component, and the cover is detachably connected to the fixing component.

6. The photovoltaic panel fixing device according to claim 5, characterized in that, The photovoltaic panel installation platform also includes multiple support components, which are spaced apart along a first direction. The ends of the multiple support components are respectively connected to the fixing components. There are two fixing components, which are spaced apart along a second direction. The first direction and the second direction are perpendicular.

7. The photovoltaic panel fixing device according to claim 6, characterized in that, The support component is a flexible tie rod; the fixing component is made of steel.

8. The construction method of the photovoltaic panel fixing device according to any one of claims 1 to 7, characterized in that, include: Site survey and location; Drilling and pre-embedding of the fixed pile shell; Two-component grouting construction; Photovoltaic panel installation platform and photovoltaic panel installation.

9. The construction method of the photovoltaic panel fixing device according to claim 8, characterized in that, In the two-component grouting construction, the first grout is cement grout, and the second grout is sodium silicate solution.

10. The construction method of the photovoltaic panel fixing device according to claim 9, characterized in that, The water-cement ratio of the cement grout is 5:1 to 1:1.

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