Hollow spiral photovoltaic pile suitable for desert area

Abstract

The utility model relates to photovoltaic power generation technical field especially suitable for hollow spiral photovoltaic pile in desert area, including support column, still including the sealing plate and photovoltaic support subassembly, support column outside is provided with photovoltaic support subassembly, and support column lower extreme fixedly connected with sealing plate, and sealing plate lower extreme fixedly connected with hollow pile body, and hollow pile body outside fixedly connected with spiral vane, and hollow pile body bottom welds with the reverse hollow cone, and the reverse hollow cone inside is provided with hollow cylinder, and the reverse hollow cone is connected with hollow cylinder through the steel sheet, and spiral vane sets up many sections, and spiral vane sectional welding is in the outside of hollow pile body, the device relative to common pile has improved pile foundation pullout resistance and pile body stability significantly, and construction efficiency has also obtained certain degree of improvement, adopts hollow structure design, compared with common pile, can save the steel material use amount significantly, reduces resource consumption, and spiral steel pile can also be reused, and there is no pollution to the environment when dismantling.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a hollow spiral photovoltaic pile suitable for desert areas. Background Technology

[0002] A photovoltaic (PV) pile is a type of pile foundation device that combines structural support with photovoltaic power generation. By embedding or attaching photovoltaic panels, energy storage units, or power transmission systems into the pile body, it achieves energy self-sufficiency or grid-connected power generation. Its core design concept is to integrate photovoltaic modules into the pile body through structural innovation, enabling the pile foundation to not only perform traditional support and anchoring functions, but also directly utilize solar energy to generate electricity, achieving "one pile for two purposes" or even multi-functional integration.

[0003] In desert regions, the stability and uplift capacity of photovoltaic (PV) support foundations are particularly important due to the high mobility of desert sand and strong wind loads. Current PV support foundation types include steel piles (steel profile piles and helical piles), concrete pipe piles, concrete foundations (isolated foundations and strip foundations), and micro-hole cast-in-place piles. Among these, steel piles are widely used in desert regions due to their advantages such as low material consumption, high strength, low soil displacement, easy construction, convenient transportation, and reusability. However, the existing foundation types do not provide good stability in deserts, resulting in large settlement of support foundations and low pile stability during the construction of PV power stations in desert areas. Utility Model Content

[0004] Existing photovoltaic piles do not offer good stability in desert environments, leading to technical challenges such as large foundation settlement and low pile stability during the construction of photovoltaic power stations in desert areas.

[0005] The technical solution of this utility model is as follows: a hollow spiral photovoltaic pile suitable for desert areas, including a support column; it also includes a sealing plate and a photovoltaic support component; a photovoltaic support component is provided on the outside of the support column, a sealing plate is fixedly connected to the lower end of the support column, a hollow pile body is fixedly connected to the lower end of the sealing plate, a spiral blade is fixedly connected to the outside of the hollow pile body, and an inverted hollow cone is welded to the bottom of the hollow pile body.

[0006] Preferably, a hollow cylinder is provided on the inner side of the inverted hollow cone, and the inverted hollow cone and the hollow cylinder are connected by a steel plate.

[0007] Preferably, the helical blades are provided in multiple segments, which are welded to the outside of the hollow pile body.

[0008] As a preferred option, the hollow pile body is made of Q335 steel with a diameter of 150mm, a pile length of 2500mm, and a wall thickness of 8mm.

[0009] Preferably, the blade width of the helical blade is 50 mm and the thickness is 10 mm.

[0010] Preferably, the photovoltaic support module includes a fixing hoop, a fixing hoop is fixedly connected to the outside of the support column, a bolt is provided on one side of the fixing hoop, a nut is threaded to the outside of the bolt, a fixing rod is fixedly connected to the inside of the fixing hoop, a connecting block is rotatably connected to one side of the fixing rod, a support rod is fixedly connected to the upper end of the connecting block, a reinforcing rod is fixedly connected to one side of the support rod, the other side of the reinforcing rod is fixedly connected to the fixing rod, an installation rod is fixedly connected to the upper end of the support rod, and a photovoltaic panel is fixedly connected to the upper end of the installation rod.

[0011] Preferably, two sets of fixing hoops are provided on the fixing hoop, and the two sets of fixing hoops are fixed to the outside of the support column by bolts and nuts.

[0012] The beneficial effects of this utility model are as follows: Compared with traditional photovoltaic piles, the foundation form is not very stable in the desert. In the construction of photovoltaic power stations in desert areas, the support foundation settlement is large and the pile body stability is low. This device significantly improves the pull-out force and pile body stability of the pile foundation compared with ordinary piles. The construction efficiency is also improved to a certain extent. The hollow structure design can significantly save steel usage and reduce resource consumption compared with ordinary piles. The spiral steel piles can also be reused and do not pollute the environment when dismantled. Attached Figure Description

[0013] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0014] Figure 2 The diagram shown is a three-dimensional structural illustration of the hollow pile body, spiral blades, and inverted hollow cone combination of this utility model.

[0015] Figure 3 The diagram shown is a composite structure of the inverted hollow cone, steel plate, and hollow cylinder of this utility model.

[0016] Figure 4 The diagram shown is a three-dimensional structural schematic of the photovoltaic support component of this utility model.

[0017] Figure 5 The diagram shown is another three-dimensional structural schematic of the photovoltaic component of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Support column; 201. Sealing plate; 202. Hollow pile body; 203. Helical blade; 204. Inverted hollow cone; 205. Steel plate; 206. Hollow cylinder; 301. Fixing hoop; 302. Fixing rod; 303. Bolt; 304. Nut; 305. Connecting block; 306. Support rod; 307. Reinforcing rod; 308. Mounting rod; 309. Photovoltaic panel. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Desert photovoltaic (PV) piles commonly employ helical piles or micropiles, increasing the anchoring force by expanding the contact area between the pile and the sand. For example, the helical piles used in the Dalad Banner project have a 40% larger contact area than traditional piles, penetrating the active sand layer to the stable layer (≥3 meters), and improving wind erosion resistance by 60%. Furthermore, the pile surface is often treated with an anti-corrosion coating to resist metal fatigue (temperature differences can reach 80℃) and sand abrasion caused by diurnal temperature variations. The shading effect of the PV panels lowers the surface temperature by 5-8℃ and increases air humidity by 10-15%, creating favorable conditions for vegetation growth. Actual measurement data shows that vegetation coverage under the PV panels is more than 40% higher than in open areas. For example, the Etuoke Banner project, through the infiltration of water from photovoltaic panel cleaning and the shading effect, increases grassland water retention, thus curbing grassland desertification. Taking the Kubuqi 2 million kilowatt photovoltaic desertification control project in the Mengxi base as an example, the average annual income from photovoltaic power generation is approximately 560 million yuan (including electricity price subsidies), the annual income from planting cash crops such as licorice under the panels is approximately 120 million yuan, and the income from carbon trading is approximately 30 million yuan. After adding operation and maintenance costs (average 180 million yuan per year), the static payback period is approximately 9 years. Photovoltaic desertification control projects create diversified income sources through the "power generation on the panels, planting under the panels, and livestock breeding between the panels" model. For example, in the Kubuqi project, livestock and poultry are raised between the panels, and the manure is returned to the fields to control desertification and improve the soil, forming a "livestock and grass coupling" circular economy. Such projects have created employment for more than 3,000 herder households in the surrounding area, with an average annual income increase of more than 20,000 yuan per person.

[0021] Photovoltaic piles are the foundation structures used in ground-mounted solar photovoltaic systems to fix and support photovoltaic panels or brackets. Steel piles, composed of angle steel, steel plates, and screws, are easy to install and suitable for locations requiring minimal maintenance. Concrete piles, made of reinforcing steel, concrete, and formwork, offer structural stability and are suitable for long-term use, especially in areas with high structural strength requirements. Helical piles, with their helical features, can be directly driven into the ground using a pile driver, allowing for quick construction and suitability for various soil conditions, particularly soft or sandy soils. Among these, straight helical piles are used in solar photovoltaic projects and can be directly inserted into the soil, suitable for grasslands or soft soils; U-shaped helical piles are suitable for fixing fences and railings. High-strength composite material piles are specifically designed for special environments such as deserts, beaches, and saline-alkali lands, featuring corrosion resistance and ease of construction. Photovoltaic cast-in-place piles are infrastructure suitable for installing solar panels, consisting of concrete columns and support bases for connecting the solar panels and their brackets. They are a highly reliable solar panel infrastructure that helps to securely fix solar panels to the ground and ensures they are not damaged in harsh weather conditions.

[0022] Photovoltaic piles are typically made of metal (such as high-quality steel, manufactured using hot-dip galvanizing for corrosion protection, with a yield strength ≥235 / 355MPa, excellent compressive strength, and meeting stringent geological load-bearing requirements) or concrete, with some using high-strength composite materials. They possess characteristics such as acid and alkali resistance and long service life. The anti-corrosion layer of photovoltaic piles generally uses hot-dip galvanizing (zinc layer thickness ≥85μm), with a salt spray test life ≥3000 hours, adapting to harsh environments such as high humidity and high salinity. The design of photovoltaic piles aims to maximize the power generation efficiency of solar panels while ensuring system stability under various environmental conditions. For example, helical piles can penetrate and compact the soil around the pile hole, increasing the lateral friction resistance of the surrounding soil, giving the pile foundation strong bearing capacity, pull-out force, and horizontal resistance, with small deformation and good stability. The installation of photovoltaic piles is relatively simple and quick, eliminating the concrete pouring process required for traditional building or foundation construction, saving construction time and labor costs, and reducing environmental impact. For example, spiral piles can be directly screwed into the ground, offering high installation efficiency, mobility, and reusability; photovoltaic piles can be screwed in or out as needed, facilitating equipment disassembly and reinstallation, providing flexibility and sustainability. They can be laid out and reconfigured according to requirements to optimize power generation efficiency and are highly adaptable; photovoltaic piles are suitable for various terrains and soil conditions, and can be used in buildings, industrial facilities, agricultural parks, etc., providing reliable support for clean energy power generation. Before installation, a geological survey is required to confirm the soil type, groundwater level, and obstacles, and to select a suitable pile type; at the same time, tools such as hydraulic pile drivers / vibratory hammers, levels, and GPS positioning devices should be prepared, and installation should proceed according to the plan. Mark the pile position on the design drawings with an error of ≤5cm; drive directly vertically into soft soil layers at a speed of ≤1m / min; pre-drill holes (70% of the pile diameter) in hard soil layers and inject cement grout to enhance stability; calibrate with a level after installation, with a vertical deviation of ≤2°, and lock the top to the support; fill the gaps around the pile with gravel to prevent soil erosion and mechanical damage to the galvanized layer; use nylon slings for transportation; customized design is required for extreme geological conditions (such as frozen soil); under normal environmental and standard installation conditions, the design life is ≥30 years; in coastal / industrial areas, it is recommended to check the galvanized layer every 5 years, and apply epoxy resin as needed, and regularly check the verticality of the pile and the tightness of the connectors.

[0023] Please see Figures 1-5This utility model provides an embodiment: a hollow spiral photovoltaic pile suitable for desert areas, including a support column 1; it also includes a sealing plate 201 and a photovoltaic support assembly; a photovoltaic support assembly is provided on the outside of the support column 1, the sealing plate 201 is fixedly connected to the lower end of the support column 1, a hollow pile body 202 is fixedly connected to the lower end of the sealing plate 201, a spiral blade 203 is fixedly connected to the outside of the hollow pile body 202, an inverted hollow cone 204 is welded to the bottom of the hollow pile body 202, a hollow cylinder 206 is provided on the inner side of the inverted hollow cone 204, and the inverted hollow cone 204 and the hollow cylinder 206 are connected by a steel plate 205. The purpose of the hollow inverted cone-shaped pile tip is to compact the soil around the pile tip during the process of the pile spiraling into the soil layer, preventing the soil from flowing out of the pile body during the loading process. The spiral blade 203 is provided with multiple segments. The spiral blades 203 are welded in sections to the outside of the hollow pile body 202. The spiral blades 203 can be screwed into the sand layer, making construction convenient. Furthermore, the spiral blades 203 can also withstand some of the upward pull-out force, increasing the pull-out bearing capacity compared to unthreaded piles. The hollow pile body 202 is made of Q335 steel, with a diameter of 150mm, a pile length of 2500mm, and a wall thickness of 8mm. The spiral blades 203 have a blade width of 50mm and a thickness of 10mm. A vehicle-mounted spiral pile driver using a hydraulic + mechanical transmission method is used to screw the blades 203 into the sand to a depth of 2.1m. The welded spiral blades 203 on the outer wall can be screwed into the sand layer, making construction convenient. Furthermore, the spiral blades 203 can also withstand some of the upward pull-out force, increasing the pull-out bearing capacity compared to unthreaded piles. After the hollow pile 202 is screwed into the sand layer, some sand enters the hollow pile 202. Then, the entire hollow pile 202 is filled with sand. After filling, the hollow pile 202 is sealed with a sealing plate 201 to ensure the integrity of the hollow pile 202 and the sand. In this way, when the pile is subjected to pull-out load, the self-weight of the sand in the middle will also share part of the load. The purpose of setting the inverted hollow cone 204, steel plate 205 and hollow cylinder 206 is to compact the soil around the pile tip during the process of the pile being screwed into the soil layer, and to prevent the soil from flowing out of the pile body during the loading process, so as to reduce the bearing capacity.

[0024] Please see Figures 4-5In this embodiment, the photovoltaic support assembly includes a fixing hoop 301. The fixing hoop 301 is fixedly connected to the outside of the support column 1. A bolt 303 is provided on one side of the fixing hoop 301. A nut 304 is threadedly connected to the outside of the bolt 303. A fixing rod 302 is fixedly connected to the inside of the fixing hoop 301. A connecting block 305 is rotatably connected to one side of the fixing rod 302. A support rod 306 is fixedly connected to the upper end of the connecting block 305. A reinforcing rod 307 is fixedly connected to one side of the support rod 306. The other side of the reinforcing rod 307 is fixedly connected to the fixing rod 302. An installation rod 308 is fixedly connected to the upper end of the support rod 306. A photovoltaic panel 309 is fixedly connected to the upper end of the installation rod 308. Two sets of fixing hoops 301 are provided on the fixing hoop 301. The two sets of fixing hoops 301 are fixed to the outside of the support column 1 by bolts 303 and nuts 304. The two sets of fixing hoops 301 make the fixation more secure and stable.

[0025] During the work, hollow steel pipe piles and helical blades 203, made of Q335 steel, are first prefabricated in the factory. The helical blades 203 are then welded to the photovoltaic piles in sections and stages, using the same material as the piles. The pile tips are fabricated in the factory according to the drawings and welded to the pile bottom. After fabrication, a vehicle-mounted helical pile driver, driven by a hydraulic and mechanical transmission, is used to drive the pile 2.1m into the sand. The helical blades 203 welded to the outer wall facilitate drilling into the sand layer, making construction easier. Furthermore, the helical blades 203 can also withstand some of the upward pull-out force, increasing the pull-out bearing capacity compared to unthreaded piles. After the hollow pile 202 is screwed into the sand layer, some sand enters the hollow pile 202. The entire hollow pile 202 is then filled with sand. After filling, a sealing plate 201 is used to seal the hollow pile 202, ensuring the integrity of the hollow pile 202 and the sand. This way, under the action of uplift load, the weight of the sand in the middle will also share part of the load. The purpose of setting the inverted hollow cone 204, steel plate 205, and hollow cylinder 206 is to compact the soil around the pile tip during the pile's screwing into the soil layer, preventing the soil from collapsing under load. The flow of water out of the pile body reduces the bearing capacity. Finally, the support column 1 is installed on the sealing plate 201. The fixing hoop 301 and the fixing rod 302 are fixed to the outside of the support column 1 by the cooperation of bolts 303 and nuts 304. Then, the connecting block 305 is fixed to the fixing rod 302, and the support rod 306 is fixed to the upper end of the connecting block 305. The support rod 306 and the fixing rod 302 are fixed by the reinforcing rod 307. Then, the installation rod 308 is fixed to the support rod 306. Finally, the photovoltaic panel 309 is installed on the installation rod 308.

[0026] Through the above steps, a vehicle-mounted helical pile driver using a hydraulic + mechanical transmission drive is driven 2.1m into the sand. The helical blades 203 welded to the outer wall can be driven into the sand layer, making construction more convenient. Furthermore, the helical blades 203 can also withstand part of the pull-out force, increasing the pull-out bearing capacity compared to unthreaded piles. After the hollow pile body 202 is driven into the sand layer, some sand enters the hollow pile body 202. The entire hollow pile body 202 is then filled with sand. After filling, the sealing plate 201 is used to seal the hollow pile body 202, ensuring the integrity of the hollow pile body 202 and the sand. In this way, under the action of pull-out load, the self-weight of the sand in the middle will also share part of the load. The purpose of setting the inverted hollow cone 204, steel plate 205 and hollow cylinder 206 is to compact the soil around the pile tip during the process of the pile being driven into the soil layer, preventing the soil from flowing out of the pile body during the loading process, thus reducing the bearing capacity.

Claims

1. A hollow spiral photovoltaic pile suitable for desert areas, comprising a support column (1); characterized in that: It also includes a sealing plate (201) and a photovoltaic support component; a photovoltaic support component is provided on the outside of the support column (1), the lower end of the support column (1) is fixedly connected to the sealing plate (201), the lower end of the sealing plate (201) is fixedly connected to the hollow pile body (202), the outside of the hollow pile body (202) is fixedly connected to the spiral blade (203), and the bottom of the hollow pile body (202) is welded with an inverted hollow cone (204); The photovoltaic support module includes a fixing hoop (301), a fixing hoop (301) is fixedly connected to the outside of the support column (1), a bolt (303) is provided on one side of the fixing hoop (301), a nut (304) is threaded on the outside of the bolt (303), a fixing rod (302) is fixedly connected to the inside of the fixing hoop (301), a connecting block (305) is rotatably connected to one side of the fixing rod (302), a support rod (306) is fixedly connected to the upper end of the connecting block (305), a reinforcing rod (307) is fixedly connected to one side of the support rod (306), the other side of the reinforcing rod (307) is fixedly connected to the fixing rod (302), an installation rod (308) is fixedly connected to the upper end of the support rod (306), and a photovoltaic panel (309) is fixedly connected to the upper end of the installation rod (308).

2. A hollow spiral photovoltaic pile suitable for desert areas according to claim 1, characterized in that: A hollow cylinder (206) is provided on the inner side of the inverted hollow cone (204), and the inverted hollow cone (204) and the hollow cylinder (206) are connected by a steel plate (205).

3. A hollow spiral photovoltaic pile suitable for desert areas according to claim 1, characterized in that: The spiral blade (203) is provided in multiple sections, and the spiral blade (203) is welded to the outside of the hollow pile body (202) in sections.

4. A hollow spiral photovoltaic pile suitable for desert areas according to claim 1, characterized in that: The hollow pile body (202) is made of Q335 steel, with a diameter of 150mm, a pile length of 2500mm, and a wall thickness of 8mm.

5. A hollow spiral photovoltaic pile suitable for desert areas according to claim 1, characterized in that: The blade width of the helical blade (203) is 50 mm and the thickness is 10 mm.

6. A hollow spiral photovoltaic pile suitable for desert areas according to claim 1, characterized in that: Two sets of fixing hoops (301) are provided on the fixing hoop (301), and the two sets of fixing hoops (301) are fixed to the outside of the support column (1) by bolts (303) and nuts (304).

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