Self-adaptive mountain photovoltaic protection power generation fence structure

Abstract

The invention is suitable for the field of new energy development, and provides a self-adaptive mountain photovoltaic protection power generation fence structure which comprises a dual-mode foundation, telescopic composite fiber stand columns and a flexible dynamic protection net. The dual-mode foundation comprises a concrete pier matched with a soft soil area and a spiral steel pile matched with a rock and frozen soil stratum; the composite fiber stand columns are connected with the spiral steel piles and / or the concrete piers, the composite fiber stand columns are formed by compositely winding carbon fibers and basalt fibers and curing epoxy resin, and the flexible dynamic protective nets are arranged between the adjacent composite fiber stand columns. A traditional stand column is replaced by the composite fiber stand column, the effect of reducing the weight is achieved, transportation is convenient, the transportation cost is reduced, the tensile strength and corrosion resistance are further improved, the flexible ropes on the flexible dynamic protection net are attached to the terrain, animal breakthrough and personnel climbing are prevented, and adaptation to different mountain landforms is achieved; prefabricated construction under different geological conditions is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of new energy development, and specifically relates to an adaptive mountain photovoltaic protective power generation fence structure. Background Technology

[0002] In the field of new energy development, mountain photovoltaic projects, as an important way to utilize idle mountain land and increase clean energy installed capacity, require site protection that is crucial for safe operation. Fences are needed to prevent unauthorized personnel and livestock from entering, thus avoiding damage to photovoltaic modules or causing safety accidents. However, mountain photovoltaic projects generally face inherent characteristics such as large terrain undulations (slopes often >25°) and scattered protection points (over a thousand points per site). Traditional fencing technologies are difficult to adapt, resulting in three core pain points that severely restrict project construction efficiency and protection effectiveness: Firstly, the construction efficiency of concrete columns is low and their adaptability is poor. Traditional fences rely on concrete columns for support, requiring on-site formwork construction, concrete pouring, and curing in mountainous areas. Due to inconvenient transportation in mountainous areas, the cost of transporting building materials such as sand, gravel, and cement is more than 40% higher than in plains areas. Furthermore, the concrete curing period is 7-14 days, and the curing time needs to be extended in rainy weather, causing the fence construction progress to lag behind the installation of photovoltaic modules and affecting the overall grid connection cycle of the project. More importantly, it is difficult to excavate stable pouring pits on steep slopes or gravelly terrain, making it easy for concrete columns to settle and tilt, significantly reducing the protective stability.

[0003] Secondly, steel fences have small spans and high costs. Existing steel fences are limited by the rigidity of the material and its wind load resistance, with post spans of only 2-3 meters. On steep mountain slopes (slope > 30°), in order to resist the thrust of landslides and strong wind loads, the number of posts needs to be further increased, resulting in a higher number of posts compared to plains areas, and the cost per kilometer of fence soaring by 35%. At the same time, dense posts require frequent excavation of foundation pits, which not only damages mountain vegetation but may also induce local soil erosion, which contradicts the eco-friendly construction concept of mountain photovoltaic projects.

[0004] Third, rigid structures have poor fit and gaps in protection. Traditional fences (concrete, steel) are rigid structures that cannot flexibly adapt to complex mountain terrain (such as gullies and protruding rocks). A protective gap of 5-15cm is easily formed between the bottom of the fence and the ground. Small animals (such as rabbits and squirrels) can enter the area through the gaps and gnaw on the cables. Large livestock (such as cattle and sheep) may collide with the fence, causing local deformation and further widening the gaps. In addition, rigid fences are prone to thermal expansion and contraction and cracking under temperature changes (the temperature difference between day and night in mountainous areas can reach 15-20℃), which shortens the service life and increases the later maintenance costs.

[0005] To address these issues, some projects have attempted to use wooden fences or simple wire mesh. However, wooden fences are susceptible to corrosion in the damp mountain environment and have a lifespan of only 2-3 years. Wire mesh is not strong enough and is easily breached by wild animals or damaged by humans. Neither of these methods can meet the core requirements of long-term stable protection and cost control in mountain photovoltaic fields.

[0006] In summary, existing fencing technologies are no longer suitable for the complex working conditions of mountain photovoltaic projects due to difficulties in construction, high costs, and lack of protection. There is an urgent need for a new type of fencing technology that combines the characteristics of no on-site pouring, large span support, and flexible adaptation to the terrain, in order to break through the current technical bottleneck of protection in mountain photovoltaic sites. Summary of the Invention

[0007] To address the aforementioned issues, this invention provides a flexible protective fence for mountain photovoltaic fields, comprising multiple dual-mode foundations, multiple retractable composite fiber posts, and a flexible dynamic protective net. Each dual-mode foundation includes a concrete pier adapted to soft soil areas and a spiral steel pile adapted to rock and permafrost layers. The multiple composite fiber posts are connected to corresponding spiral steel piles and / or concrete piers. The multiple composite fiber posts are formed by composite winding of carbon fiber and basalt fiber and curing with epoxy resin. The flexible dynamic protective net is set between adjacent composite fiber posts.

[0008] Furthermore, the concrete pier has a fixed cavity, in which a fixed structure is pre-set, and multiple composite fiber columns extend into the corresponding fixed cavities and are fixedly connected to the fixed structure.

[0009] Furthermore, the fixing structure is a nut, and multiple composite fiber columns are threadedly connected to the corresponding nuts.

[0010] Furthermore, the surface of the spiral steel pile is provided with a laser-clad wear-resistant layer, and the spiral steel pile has a rotating blade at the end closest to the ground, with multiple composite fiber columns fixedly connected to the corresponding spiral steel pile.

[0011] Furthermore, the spiral steel pile is provided with a connecting groove, and a portion of multiple composite fiber columns are in the connecting groove, and are connected to the corresponding composite fiber column by bolts passing through the connecting groove.

[0012] Furthermore, the flexible dynamic protective net includes prestressed anti-climbing cables with barbs, which are installed between adjacent composite fiber posts.

[0013] Furthermore, the flexible dynamic protective net also includes diagonal prestressed barbed wire, which is intersected with anti-climbing cables, and the two ends of the diagonal prestressed barbed wire are respectively set between adjacent composite fiber posts.

[0014] Furthermore, multiple composite fiber columns are equipped with rain caps on top and multiple hooks are installed along the axial direction of the composite fiber columns. Anti-climbing cables and inclined prestressed barbed wire are connected to the composite fiber columns through the hooks respectively.

[0015] Furthermore, the barbs on the anti-climb rope are 20mm long and spiral-shaped.

[0016] Furthermore, multiple composite fiber columns are equipped with expansion joints.

[0017] The adaptive mountain photovoltaic protective power generation fence structure provided by this invention has the following advantages compared with the prior art: By replacing traditional columns with composite fiber columns, weight reduction is achieved, facilitating transportation and reducing transportation costs. It also improves tensile strength and corrosion resistance. Flexible ropes on the flexible dynamic protective net conform to the terrain, preventing animals from breaking through and people from climbing, thus adapting to different mountainous terrains. The dual-mode foundation enables prefabrication construction under different geological conditions, improving work efficiency.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a flexible protective fence for a mountain photovoltaic field is shown in an embodiment of the present invention; Figure 2 A schematic diagram of a precast concrete pier for a flexible protective fence in a mountain photovoltaic field, as shown in an embodiment of the present invention, is presented. Figure 3 A schematic diagram of the spiral steel piles for the flexible protective fence of a mountain photovoltaic field is shown in an embodiment of the present invention.

[0021] In the diagram, 1. Dual-mode foundation; 11. Concrete pier; 12. Spiral steel pile; 13. Nut; 14. Thread; 16. Bolt; 15. Rotating blade; 2. Composite fiber column; 3. Flexible dynamic protective net; 31. Anti-climbing cable; 32. Inclined prestressed barbed wire. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

[0023] like Figure 1 As shown, this invention provides a flexible protective fence for a mountain photovoltaic field, comprising multiple dual-mode foundations 1, multiple retractable composite fiber posts 2, and a flexible dynamic protective net 3 with adjustable rope tension via a tensioner. Figure 2 and Figure 3 As shown, multiple dual-mode foundations 1 each include spiral steel piles 12 adapted to rock and permafrost layers and concrete piers 11 adapted to soft soil areas. Multiple composite fiber columns 2 are connected to the corresponding spiral steel piles 12 and / or to the concrete piers 11. The composite fiber columns 2 are made of carbon fiber and basalt fiber composite winding and epoxy resin cured. A flexible dynamic protective net 3 is set between adjacent composite fiber columns 2. Replacing traditional columns with composite fiber columns 2 achieves weight reduction, facilitates transportation, reduces transportation costs, and also improves tensile strength and corrosion resistance. The flexible ropes on the flexible dynamic protective net 3 conform to the terrain, preventing animal breaches and personnel climbing, thus adapting to different mountainous terrains. The dual-mode foundations 1 enable prefabrication construction under different geological conditions, improving work efficiency. It should be noted that the carbon fiber tensile strength of the composite fiber columns 2 is greater than or equal to 3800MPa, the basalt fiber (40% content) composite winding is epoxy resin cured, and the entire structure is a hollow structure. It is lighter than traditional steel columns and has improved bending strength. Basalt fiber improves the corrosion resistance of columns by 3 times compared to traditional steel columns.

[0024] like Figure 2As shown, in this embodiment, the concrete pier 11 has a fixed cavity, within which a fixed structure is pre-installed. Multiple composite fiber columns 2 extend into the corresponding fixed cavities and are fixedly connected to the fixed structure. When arranged in soft soil areas, the pre-fixed structure in the fixed cavity enables quick-connection with the composite fiber columns 2, improving installation efficiency. Furthermore, the fixed structure is a nut 13, with threads 14 on its inner wall. Multiple composite fiber columns 2 are connected to the corresponding nuts 13 via these threads 14. Optionally, the ends of the composite fiber columns 2 are equipped with snap-fit ​​structures that can snap-fit ​​with the nuts 13. The nuts 13 require specially customized slots that mate with the snap-fit ​​structures, enabling rapid installation or disassembly. The manufactured concrete piers 11 are transported to the site in advance and laid out according to the designed spacing (determined after calculating the span) using small hoisting equipment (mountain crawler crane); ensuring the piers are level (calibrated using a level).

[0025] like Figure 3 As shown, in this embodiment, the surface of the spiral steel pile 12 is provided with a laser-clad wear-resistant layer, and the spiral steel pile 12 has a rotating blade 15 at the end near the ground. Multiple composite fiber columns 2 are fixedly connected to the corresponding spiral steel piles 12. It should be noted that the wear-resistant layer extends the service life of the spiral steel pile 12, and the rotating blade 15 improves the pull-out resistance. Optionally, the rotating blade 15 of the spiral steel pile 12 can be replaced with a serrated blade (suitable for hard rock formations, improving the screw-in efficiency). Furthermore, the spiral steel pile 12 is provided with a connecting groove, and a part of the composite fiber column 2 is in the connecting groove, and is connected to the composite fiber column 2 by bolts 16 passing through the connecting groove. Optionally, the end surface of the composite fiber column 2 is provided with threads 14, and the inner wall of the connecting groove is also provided with threads 14, so that the composite fiber column 2 can be connected to the connecting groove. Alternatively, there is a slot in the connecting groove and a buckle at the end of the composite fiber column 2. The buckle and the slot cooperate with each other to achieve the connection between the composite fiber column 2 and the connecting groove. During installation, a small rotary drilling rig (suitable for narrow spaces in mountainous areas) is used. The spiral steel pile 12 is aligned with the design point, and the drilling rig is started to rotate the pile body into the stratum until the drilling depth reaches the target position (confirmed by the drilling rig depth gauge). The bolt 16 is inserted into the connecting groove and matches the reserved hole on the composite fiber column 2, and the nut 13 on the bolt 16 is tightened.

[0026] like Figure 1As shown, in this embodiment, the flexible dynamic protective net 3 includes a prestressed anti-climbing cable 31 with barbs. The anti-climbing cable 31 is positioned between adjacent composite fiber posts 2. It should be noted that an intelligent tensioner or manual tensioner is provided on the composite fiber posts 2 and connected to the anti-climbing cable 31 to adjust its tension, making the height of the anti-climbing cable 31 adjustable from the ground. This prevents animals from entering the protective net through gaps created by the inability to adjust the height of the anti-climbing cable 31, thus ensuring a constant ground clearance for the anti-climbing cable 31. Furthermore, to cope with collisions from large animals, the diameter of the anti-climbing cable 31 can be increased, the barb length length extended, and the tension adjustment range of the intelligent tensioner expanded to resist impacts such as those from wild boars. The diagonally prestressed barbed wire 32 intersects the horizontal cable at a 30° angle, and the mesh size is reduced, thereby preventing large animals from breaking through.

[0027] In this embodiment, the flexible dynamic protective net 3 also includes diagonally prestressed barbed wire 32, which is intersected with the anti-climbing rope 31, with both ends of the diagonally prestressed barbed wire 32 respectively positioned between adjacent composite fiber posts 2. Optionally, the anti-climbing rope 31 and the diagonally prestressed barbed wire 32 are arranged at a 45° angle to form a three-in-one protective net of rope, pole, and barbs, which can prevent small animals from crawling in through the gaps between the ropes. In addition, the tension of the diagonally prestressed barbed wire 32 can also be adjusted by a corresponding intelligent tensioner or manual tensioner.

[0028] Furthermore, the tops of the multiple composite fiber columns 2 are equipped with rain caps, and multiple hooks are installed along the axial direction of the composite fiber columns 2. The anti-climbing cable 31 and the inclined prestressed barbed wire 32 are respectively connected to the composite fiber columns 2 via the hooks. The rain caps prevent rainwater from penetrating the interior of the composite fiber columns 2, while the hooks facilitate the fixing or disassembly of the anti-climbing cable 31 and the inclined prestressed barbed wire 32. Optionally, the carbon fiber content in the composite fiber columns 2 can be increased, further improving the tensile strength and bending strength compared to the baseline embodiment, thereby enabling them to withstand lateral thrust on steeper slopes.

[0029] In this embodiment, the barbs on the anti-climb cable 31 are 20mm long and spiral-shaped. Optionally, the spiral angle of the barbs is 30°. The barbs can prevent animals from forcibly entering the protective net, and the length of the barbs can be adjusted according to actual needs.

[0030] In this embodiment, multiple composite fiber columns 2 are equipped with expansion joints. Optionally, the expansion joints can be adjusted in height from 3 to 5 meters, and their extension and retraction can be achieved by hydraulic cylinders or pneumatic cylinders. This allows the expansion joints to adapt to a 25° slope terrace drop.

[0031] Furthermore, the construction method of the flexible protective fence for mountain photovoltaic fields according to the present invention includes the following steps: After geological survey, type 1 dual-mode foundation was selected. For rock or frozen soil strata, spiral steel piles 12 were selected, and for soft soil areas, precast concrete piers 11 were selected. Specifically, the geological geology of the site was surveyed by ground-penetrating radar to determine the proportion of rock area and soft soil area. Spiral steel piles 12 were selected for rock area, and precast concrete piers 11 were selected for soft soil area.

[0032] Based on the terrain slope, the span of the composite fiber column is calculated with a span reduction factor K=0.8 for every 10° increase in slope, thus achieving fully automatic terrain adaptation; Construction of the double-mode foundation 1, spiral steel pile 12 is screwed into the stratum 0.5m and fixed by through bolts, and precast concrete piers 11 are arranged according to the design position; Connect the composite fiber column 2 to the double-mold foundation 1 using the bottom buckle and bolts 16 / nuts 13, and adjust the expansion joint to the design height of 3-5m; Install a flexible dynamic protection system, connect the barbed barrier cable and the inclined prestressed barbed wire 32 with hooks, and activate the intelligent tensioning mechanism to keep the gap between the protection cable and the ground constant; Install rain caps on the top of composite fiber posts 2 to complete the overall fence construction.

[0033] The scope of protection of this invention is not limited to the above embodiments. Based on the core design of "lightweight, flexible, and rapid deployment", the following equivalent adjustments are also within the scope of protection: The intelligent tensioner can be equipped with an Internet of Things (IoT) module (such as LoRa wireless communication) to enable remote monitoring of cable tension and ground clearance, making it suitable for unattended photovoltaic fields.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible protective fence for a mountain photovoltaic field, characterized in that, The system includes multiple dual-mode foundations (1), multiple retractable composite fiber columns (2), and a flexible dynamic protective net (3). Each of the multiple dual-mode foundations (1) includes a concrete pier (11) adapted to soft soil areas and a spiral steel pile (12) adapted to rock and frozen soil layers. The multiple composite fiber columns (2) are connected to the corresponding spiral steel pile (12) and / or the concrete pier (11). The multiple composite fiber columns (2) are made of carbon fiber and basalt fiber composite winding and epoxy resin curing. The flexible dynamic protective net (3) is set between adjacent composite fiber columns (2).

2. The flexible protective fence for mountain photovoltaic fields according to claim 1, characterized in that, The concrete pier (11) has a fixed cavity, and a fixed structure is preset in the fixed cavity. Multiple composite fiber columns (2) extend into the corresponding fixed cavities and are fixedly connected to the fixed structure.

3. The flexible protective fence for mountain photovoltaic fields according to claim 2, characterized in that, The fixing structure is a nut (13), and multiple composite fiber columns (2) are threaded (14) to the corresponding nuts (13).

4. The flexible protective fence for mountain photovoltaic fields according to claim 1, characterized in that, The surface of the spiral steel pile (12) is provided with a laser cladding wear-resistant layer, and the spiral steel pile (12) is provided with a rotating blade (15) at one end near the ground. Multiple composite fiber columns (2) are fixedly connected to the corresponding spiral steel pile (12).

5. The flexible protective fence for mountain photovoltaic fields according to claim 4, characterized in that, The spiral steel pile (12) is provided with a connecting groove, and a portion of the plurality of composite fiber columns (2) are in the connecting groove and connected to the corresponding composite fiber column (2) by bolts (16) passing through the connecting groove.

6. The flexible protective fence for mountain photovoltaic fields according to claim 1, characterized in that, The flexible dynamic protective net (3) includes a prestressed anti-climbing cable (31) with barbs on it, and the anti-climbing cable (31) is arranged between adjacent composite fiber columns (2).

7. The flexible protective fence for mountain photovoltaic fields according to claim 6, characterized in that, The flexible dynamic protective net (3) also includes a diagonal prestressed barbed wire (32), which is intersected with the anti-climbing cable (31), and the two ends of the diagonal prestressed barbed wire (32) are respectively set between adjacent composite fiber columns (2).

8. The flexible protective fence for mountain photovoltaic fields according to claim 7, characterized in that, The top of the composite fiber columns (2) is provided with a rainproof cap, and multiple hooks are provided along the axial direction of the composite fiber columns (2). The anti-climbing rope (31) and the oblique prestressed barbed wire (32) are respectively connected to the composite fiber columns (2) through the hooks.

9. The flexible protective fence for mountain photovoltaic fields according to claim 6, characterized in that, The barbs on the anti-climb cable (31) are 20 mm long and are spiral-shaped.

10. The flexible protective fence for mountain photovoltaic fields according to claim 1, characterized in that, Multiple composite fiber columns (2) are equipped with expansion joints.

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