Photovoltaic support pile

Abstract

The utility model relates to the technical field of photovoltaic, in particular to a photovoltaic support pile column which comprises a pile column body, the pile column body comprises a first pile column section and a second pile column section, the first pile column section and the second pile column section are prefabricated and integrally formed by concrete, and the first pile column section and the second pile column section are arranged in a thin and long mode and extend in the vertical direction. The lower end of the first pile column section is connected to the upper end of the second pile column section, the peripheral wall of the first pile column section gradually inclines outwards from top to bottom, and the peripheral wall of the second pile column section gradually inclines inwards from top to bottom. The photovoltaic pile can bear the vertical load of a photovoltaic support and accessories, can resist the horizontal force action of the photovoltaic support and the accessories, and has the effects that the rigidity of the pile is improved, the dead weight of the pile is reduced, the pile can bear the large wind load in the typhoon period and is not prone to being broken off, and sedimentation caused by the dead weight is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic support pile. Background Art

[0002] With the rapid development of the photovoltaic industry, supporting facilities such as photovoltaic brackets and photovoltaic panels are becoming more and more complete. However, there is no systematic manufacturing and construction system for the columns used to install photovoltaic bracket accessories. Most of them directly use precast piles in construction projects as the foundation of photovoltaic brackets. The precast piles in construction projects are completely embedded in the soil, and the cement soil and soil around the piles provide constraints for the precast piles. The requirements for the bending and shear resistance of the precast piles are relatively small. The tidal flats and shallow sea areas can be roughly divided into the water level zone, foundation zone one and foundation zone two from top to bottom. The lateral constraint of the water level zone on the photovoltaic support foundation is very small. The soil in foundation zone one is soft and has a high water content. The lateral constraint has increased compared to the water level zone, but the increase is limited. The soil in foundation zone two gradually improves and the lateral constraint on the photovoltaic support foundation is relatively large. When the photovoltaic support foundation is applied to tidal flats and shallow sea areas, during typhoons, the photovoltaic support will impose a large horizontal load on the upper end of the photovoltaic support foundation. The photovoltaic support foundation located in foundation zone one will be subjected to relatively large shear force. Directly using small-sized cylindrical precast piles as the photovoltaic support foundation for application in tidal flats and shallow sea areas, the precast piles are prone to deformation due to insufficient rigidity. Although the use of large-diameter cylindrical precast piles can meet the rigidity requirements, it is easy to cause large settlement due to the large deadweight of the precast piles. Utility Model Content

[0003] The purpose of this application is to provide a photovoltaic support pile column that can improve rigidity while reducing the pile column's own weight, can withstand large wind loads during typhoons without causing excessive deformation, and reduce settlement caused by its own weight.

[0004] In order to solve the above problems, the present application provides a photovoltaic support pile, which adopts the following technical solution:

[0005] A photovoltaic support pile, comprising a pile, wherein the pile comprises a first pile section and a second pile section, wherein the first pile section and the second pile section are both prefabricated from concrete, the first pile section and the second pile section are both slender and extend vertically, the lower end of the first pile section is connected to the upper end of the second pile section, the outer peripheral wall of the first pile section gradually tilts outward from top to bottom, and the outer peripheral wall of the second pile section gradually tilts inward from top to bottom.

[0006] After adopting the above structure, a tapered structure with small ends and large middle is adopted. On the one hand, the cross-sectional size of the pile column in the foundation area is increased to improve the stiffness of the pile column, thereby improving the bending and shearing resistance of the pile column, so that the pile column can withstand large wind loads without excessive deformation or even breakage; on the other hand, the soil around the pile column is compacted when the pile column is implanted, increasing the structural strength of the soil around the pile column, thereby increasing the constraint force of the soil around the pile column on the pile column, resisting the lateral deformation of the pile column, so that the lateral constraint of the pile column is strengthened, and the lateral deformation and horizontal displacement of the pile column during the typhoon are reduced. At the same time, compared with the cylindrical prefabricated pile with the same maximum outer diameter as the pile column, the tapered structure with small ends and large middle can also reduce the amount of concrete used in the prefabrication of the pile column, thereby reducing the deadweight of the pile column, so as to reduce the settlement caused by the large deadweight of the pile column, and the extrusion force applied by the soil to the second pile column section is inclined upward, and the vertical component of the extrusion force supports the pile column, further reducing the vertical settlement of the pile column.

[0007] Optionally, the cross-sectional shape of the first pile column segment and the second pile column segment is one of a circle, a polygon, a circular ring or a polygonal ring.

[0008] Optionally, the diameter or side length of the connection between the first pile column segment and the second pile column segment is consistent, and the outer contour of the upper end surface of the second pile column segment is concentrically arranged with the outer contour of the lower end surface of the first pile column segment.

[0009] Optionally, the cross-sectional shape of the first pile column segment is the same as that of the second pile column segment, the diameters or side lengths at the connection between the first pile column segment and the second pile column segment are inconsistent, and the outer contour of the upper end surface of the second pile column segment is concentrically arranged with the outer contour of the lower end surface of the first pile column segment.

[0010] Optionally, the first pile column section and the second pile column section are both arranged in a frustum shape.

[0011] Optionally, the piles are prefabricated in one piece.

[0012] Optionally, the first pile-column section and the second pile-column section are both arranged in a frustum shape, and a steel cage is pre-embedded in the pile column, the steel cage comprising a plurality of first main bars, a plurality of second main bars, a first hoop and a second hoop, the first main bar extends from the upper end to the lower end of the first pile-column section, and the plurality of first main bars are evenly distributed in the circumferential direction and arranged in a radial frustum shape, the first hoop is fixed around and around the frustum formed by the plurality of first main bars, the frustum formed by the plurality of first main bars is located in the first pile-column section and has an inclination angle the same as that of the first pile-column section, the second main bar extends from the upper end to the lower end of the second pile-column section, and the plurality of second main bars are evenly distributed in the circumferential direction and arranged in a radial frustum shape, the second hoop is fixed around and around the frustum formed by the plurality of second main bars, the frustum formed by the plurality of second main bars is located in the second pile-column section and has an inclination angle the same as that of the second pile-column section, and the lower end of the first main bar is connected to the upper end of the second main bar.

[0013] Optionally, the pile column also includes an upper end plate located at the upper end of the first pile column segment, an intermediate end plate located at the connection between the first pile column segment and the second pile column segment, and a lower end plate located at the lower end of the second pile column segment, the upper end plate is connected to the upper end of the first main reinforcement to provide an upward tensioning force for the first main reinforcement, the lower end of the first main reinforcement and the upper end of the second main reinforcement are respectively connected to the two ends of the intermediate end plate, and the lower end plate is connected to the lower end of the second main reinforcement to provide a downward tensioning force for the second main reinforcement.

[0014] Optionally, the intermediate end plate is connected to a first sleeve, a first external thread is provided on an outer peripheral wall at the lower end of the first sleeve, the intermediate end plate is provided with a first threaded hole matched with the first external thread, a first countersunk hole with an opening facing downward is provided at the lower end of the first sleeve, the diameter of the first countersunk hole is larger than the inner hole diameter of the first sleeve, and a first upsetting head is provided at the lower end of the first main rib, and the first upsetting head can be clamped in the first countersunk hole;

[0015] The intermediate end plate is connected to a second sleeve, and a second external thread is provided on the outer peripheral wall of the upper end of the second sleeve, and a second threaded hole matching the second external thread is provided on the intermediate end plate. A second countersunk hole with an opening facing upward is provided at the lower end of the second sleeve, and the diameter of the second countersunk hole is larger than the inner hole diameter of the second sleeve. A second swaging head is provided at the upper end of the second main rib, and the second swaging head can be clamped in the second countersunk hole. The first sleeve and the second sleeve are arranged in sequence along the circumference of the intermediate end plate.

[0016] Optionally, the middle end plate is provided with an anchor hole structure connected to the first main reinforcement, the lower end of the first main reinforcement is provided with a first swaging head, the anchor hole structure includes a first anchor hole, a first reinforcement hole and a first reinforcement hole, the first anchor hole, the first reinforcement hole and the first reinforcement hole all penetrate the middle end plate axially, the first anchor hole is a threaded hole, the first reinforcement hole is arranged in an elongated strip shape and extends circumferentially along the middle end plate, one end of the first reinforcement hole is connected with the first anchor hole, the first reinforcement hole is connected with the other end of the first reinforcement hole, the first reinforcement hole is a stepped hole, the first swaging head can penetrate into the first anchor hole from the lower end surface of the middle end plate and be clamped in the first reinforcement hole through the first reinforcement hole;

[0017] The middle end plate is provided with a second sleeve connected to the second main rib, and a second external thread is provided on the outer peripheral wall of the upper end of the second sleeve. The middle end plate is provided with a second threaded hole matching the second external thread. The lower end of the second sleeve is provided with a second countersunk hole with an opening facing upward, and the diameter of the second countersunk hole is larger than the inner hole diameter of the second sleeve. The upper end of the second main rib is provided with a second upsetting head, and the second upsetting head can be clamped in the second countersunk hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a photovoltaic support pile in Example 1 of this application. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of a photovoltaic support pile in Example 1 of this application. Figure 2 ;

[0020] Figure 3 This is a force analysis diagram of the upper end of a photovoltaic support pile column in Example 1 of the present application when it is subjected to a horizontal load;

[0021] Figure 4 It is a partial exploded schematic diagram of the upper end plate and the first main reinforcement of Example 2 in the present application;

[0022] Figure 5 It is a partial exploded schematic diagram of the middle end plate, the first main reinforcement and the first sleeve of Example 2 in the present application;

[0023] Figure 6 This is a schematic diagram of the structure of the first sleeve in Example 2 of the present application;

[0024] Figure 7 This is a schematic diagram of the structure of the middle end plate when the diameter of the lower end of the first pile column section in Example 2 of the present application is greater than the diameter of the upper end of the second pile column section Figure 1 ;

[0025] Figure 8This is a schematic diagram of the structure of the middle end plate when the diameter of the lower end of the first pile column section in Example 2 of the present application is greater than the diameter of the upper end of the second pile column section Figure 2 .

[0026] Description of reference numerals:

[0027] 10. Pile column; 11. First pile column section; 12. Second pile column section; 20. Steel cage; 21. First main reinforcement; 211. First swaging head; 212. Third swaging head; 22. Second main reinforcement; 23. Upper end plate; 231. Second anchor hole; 232. Second reinforcement hole; 233. Second reinforcement hole; 234. First supporting cone; 24. Middle end plate; 241. First threaded hole; 242. First anchor hole; 243. First reinforcement hole; 244. First reinforcement hole; 25. Lower end plate; 30. First sleeve; 31. First countersunk hole; 32. First external thread; 33. First driving unit; 34. Second supporting cone; 40. Second sleeve. DETAILED DESCRIPTION

[0028] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electric welding connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0029] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following is a brief description of the present invention in conjunction with the attached Figure 1-7 The specific embodiments of the present application are described in detail. Example

[0031] The present application embodiment discloses a photovoltaic support pile. Figure 1The photovoltaic support pile column includes a pile column 10, and the pile column 10 includes a first pile column section 11 and a second pile column section 12. The first pile column section 11 and the second pile column section 12 are both prefabricated with concrete, and the first pile column section 11 and the second pile column section 12 are both slender, and the first pile column section 11 and the second pile column section 12 extend vertically, and the lower end of the first pile column section 11 is connected to the upper end of the second pile column section 12, and the upper end of the first pile column section 11 is used to connect the photovoltaic support. The outer peripheral wall of the first pile column section 11 gradually tilts outward from top to bottom, that is, it is a cone-shaped setting with a small top and a large bottom. The outer peripheral wall of the second pile column section 12 gradually tilts inward from top to bottom, that is, it is a cone-shaped setting with a large top and a small bottom.

[0032] The pile column 10 adopts a tapered structure with small ends and a large middle. On the one hand, the cross-sectional size of the pile column 10 in the foundation area is increased to improve the rigidity of the pile column 10, thereby improving the bending and shearing resistance of the pile column 10, so that the pile column 10 can withstand a large wind load during a typhoon without causing a large displacement or even breaking. On the other hand, when the pile column 10 is implanted, the soil around the pile column 10 is compacted to increase the structural strength of the soil around the pile column 10, thereby increasing the constraint force of the soil around the pile column 10 on the pile column 10, and increasing the contact area between the pile column 10 and the soil, so that the lateral constraint of the pile column 10 is strengthened, reducing the lateral deformation and horizontal displacement of the pile column 10 during a typhoon. At the same time, compared with a cylindrical prefabricated pile with the same maximum outer diameter as the pile column 10, the tapered structure with small ends and a large middle can also reduce the amount of concrete used when the pile column 10 is prefabricated, thereby reducing the deadweight of the pile column 10 and reducing the settlement caused by the heavy deadweight of the pile column 10. In addition, the extrusion pressure applied by the soil to the second pile column section 12 is inclined upward, and the vertical component of the extrusion pressure supports the pile column 10, further reducing the vertical settlement of the pile column 10.

[0033] The cross-sectional shapes of the first pile column segment 11 and the second pile column segment 12 are both one of a circle, a regular polygon, a circular ring or a regular polygonal ring. The regular polygonal ring can be a ring with a regular polygonal outer contour and a circular inner contour, or a ring with both the outer contour and the inner contour being regular polygons. The cross-sectional shapes of the first pile column segment 11 and the second pile column segment 12 can be selected according to the usage scenario of the pile column 10. In this embodiment, the cross-sectional shapes of the first pile column segment 11 and the second pile column segment 12 are introduced by taking a circular ring as an example.

[0034] The first pile column section 11 and the second pile column section 12 are both arranged in a frustum shape, and the diameter or side length of the connection between the first pile column section 11 and the second pile column section 12 is consistent. In this way, the outer peripheral walls of the first pile column section 11 and the second pile column section 12 are arranged to have a smooth transition, which can reduce the stress concentration of the overall force after the first pile column section 11 and the second pile column section 12 are connected.

[0035] The pile column 10 can be prefabricated in one piece, that is, the first pile column section 11 and the second pile column section 12 are prefabricated in one piece. This configuration saves the process of connecting the first pile column section 11 and the second pile column section 12, reduces the construction cost, and avoids the deviation caused by the process of connecting the piles, ensuring the coaxiality of the first pile column section 11 and the second pile column section 12; the first pile column section 11 and the second pile column section 12 of the pile column 10 can also be prefabricated separately and then welded together. When the required length of the photovoltaic support pile column is longer, the first pile column section 11 and the second pile column section 12 can be prefabricated separately to facilitate transportation, and then connected after being transported to the construction site. In this embodiment, the first pile column section 11 and the second pile column section 12 are introduced as an example of being prefabricated in one piece.

[0036] Reference Figure 2 , the diameter or side length of the connection between the first pile column section 11 and the second pile column section 12 may be inconsistent. In this case, the cross-sectional shape of the first pile column section 11 may be the same as or different from the cross-sectional shape of the second pile column section 12, and the specific selection may be made according to the application scenario. The cross-sectional shape of the first pile column section 11 is the same as the cross-sectional shape of the second pile column section 12, that is, the first pile column section 11 and the second pile column section 12 are both truncated cones or triangular pyramids or quadrangular pyramids; the cross-sectional shape of the first pile column section 11 is different from the cross-sectional shape of the second pile column section 12, that is, the first pile column section 11 is a truncated cone, and the second pile column section 12 is a triangular pyramid or a quadrangular pyramid. In this embodiment, the cross-sectional shape of the first pile column segment 11 is described by taking the cross-sectional shape of the second pile column segment 12 as the same, and at the same time, the outer edge of the lower end surface of the first pile column segment 11 is arranged on the outside of the outer edge of the upper end surface of the second pile column segment 12, and the shortest distance from any point of the outer edge of the upper end surface of the second pile column segment 12 to the outer edge of the lower end surface of the first pile column segment 11 is the same.

[0037] The outer edge of the lower end surface of the first pile column section 11 is arranged outside the outer edge of the upper end surface of the second pile column section 12, so that the outer area of ​​the lower end surface of the first pile column section 11 is exposed from the upper end surface of the second pile column section 12 and contacts the soil, thereby increasing the contact area between the pile column 10 and the soil, thereby increasing the vertical support of the soil to the pile column 10, and further reducing the vertical settlement of the pile column 10.

[0038] Reference Figure 3 After the pile 10 is implanted in the mudflat and shallow sea area, most of the second pile section 12 is located in the foundation area 2, the lower end of the first pile section 11 and the upper end of the second pile section 12 are located in the foundation area 1, the middle pile section of the first pile section 11 is located in the water level area, and the upper end of the first pile section 11 is exposed above the water surface for connecting the photovoltaic bracket.

[0039] The soil in the first foundation area is soft, with high water content and small lateral constraint (lateral constraint force is about 3 to 5 times the diameter of the column). Therefore, the bending moment and shear force borne by the pile column 10 segment in the first foundation area are relatively large. By increasing the cross-sectional size of the pile column 10, that is, the larger diameter ends of the first pile column segment 11 and the second pile column segment 12 are located in the first foundation area, the stiffness (EI) of the pile column 10 is increased, and the bending and shearing performance of the pile column 10 is improved, so that the pile column 10 can withstand large wind loads and is not easy to break during typhoons. The soil in the second foundation area gradually improves, the lateral constraint on the pile column 10 is strengthened, and the soil has an embedding effect on the pile column 10. Therefore, the bending moment and shear force borne by the pile column 10 segment in the second foundation area gradually decrease, and the lateral deformation also gradually decreases. After the diameter of the second pile column segment 12 is reduced, it can also meet the bending moment and shearing requirements of this area. The lateral constraint of the pile column 10 in the water level area is smaller than that in the foundation area 1, and the bending moment and shear force are smaller. After the diameter of the first pile column section 11 is reduced, it can also meet the requirements of the bending moment and shear force. Example

[0040] Reference Figure 1 In this embodiment, the first pile column section 11 and the second pile column section 12 are introduced as an example of integral prefabrication. A steel cage 20 is pre-embedded in the pile column 10. The steel cage 20 includes a plurality of first main bars 21, a plurality of second main bars 22, a first stirrup and a second stirrup.

[0041] The first main reinforcement 21 extends from the upper end to the lower end of the first pile column section 11, and a plurality of first main reinforcements 21 are evenly distributed along the circumference of the first pile column section 11 in a radial frustum shape, and the first hoop is fixed around the outer side of the frustum formed by the plurality of first main reinforcements 21. The frustum formed by the plurality of first main reinforcements 21 is located in the first pile column section 11, and the inclination angle of the frustum formed by the plurality of first main reinforcements 21 is the same as the inclination angle of the first pile column section 11. The second main reinforcement 22 extends from the upper end to the lower end of the second pile column section 12, and a plurality of second main reinforcements 22 are evenly distributed along the circumference of the second pile column section 12 in a radial frustum shape, and the second hoop is fixed around the outer side of the frustum formed by the plurality of second main reinforcements 22. The frustum formed by the plurality of second main reinforcements 22 is located in the second pile column section 12, and the inclination angle of the frustum formed by the plurality of second main reinforcements 22 is the same as the inclination angle of the second pile column section 12. The lower end of the first main rib 21 is connected to the upper end of the second main rib 22 so that the first main rib 21 and the second main rib 22 can transmit axial force.

[0042] The pile column 10 further includes an upper end plate 23, an intermediate end plate 24 and a lower end plate 25. The upper end plate 23 is located at the upper end of the first pile column section 11, and the outer diameter of the upper end plate 23 is equal to the outer diameter of the upper end of the first pile column section 11; the lower end plate 25 is located at the lower end of the second pile column section 12, and the outer diameter of the lower end plate 25 is equal to the outer diameter of the lower end of the second pile column section 12; the intermediate end plate 24 is located at the connection between the first pile column section 11 and the second pile column section 12, and the outer diameter of the intermediate end plate 24 is equal to the outer diameter of the lower end of the first pile column section 11.

[0043] The lower end plate 25 is connected to the lower end of the second main reinforcement 22 to provide downward tensioning force for the second main reinforcement 22. The upper end plate 23 is connected to the upper end of the first main reinforcement 21 to provide upward tensioning force for the first main reinforcement 21. The upper end of the second main reinforcement 22 and the lower end of the first main reinforcement 21 are respectively connected to the two ends of the middle end plate 24, that is, the steel cages of the first pile column section 11 and the second pile column section 12 are connected together; when the steel cages of the first pile column section 11 and the second pile column section 12 are set separately, four end plates are required, and the two steel cages need to be tensioned separately; in this embodiment, the steel cages of the first pile column section 11 and the second pile column section 12 are connected together, and only the middle end plate 24 needs to be fixed, so that the first main reinforcement 21 can be tensioned through the upper end plate 23, and the second main reinforcement 22 can be tensioned through the lower end plate 25, so that the prestress is evenly distributed on the first main reinforcement 21 and the second main reinforcement 22, which improves the tensioning efficiency of the steel cage and saves an end plate.

[0044] Reference Figure 1 and Figure 4 The upper end of the first main reinforcement 21 is provided with a third ridge 212, the diameter of the third ridge 212 is larger than the diameter of the first main reinforcement 21, and the upper end plate 23 is provided with a second anchor hole 231 with a diameter larger than the diameter of the third ridge 212. The second anchor hole 231 extends from the upper end surface of the upper end plate 23 to the lower end surface. The second anchor hole 231 is a threaded hole, so as to be connected with the tensioning bolt, so as to facilitate the tensioning of the steel cage. The upper end plate 23 is also provided with a second ridge hole 232 which is arranged in a long strip shape and extends along the circumference of the upper end plate 23. The second ridge hole 232 extends from the upper end surface of the upper end plate 23 to the lower end surface. The second ridge hole 232 is used for the first main reinforcement 21 to pass through. One end of the second ridge hole 232 is connected with the second anchor hole 231, and the width of the second ridge hole 232 is smaller than the diameter of the third ridge 212. The upper end plate 23 is provided with a second rib hole 233 connected to the other end of the second rib hole 232. The second rib hole 233 is a stepped hole. The maximum diameter of the second rib hole 233 is greater than the diameter of the third upsetting head 212. The minimum diameter of the second rib hole 233 is greater than the diameter of the first main rib 21 and smaller than the diameter of the third upsetting head 212. The third upsetting head 212 can be snapped into the second rib hole 233 to keep the end surface of the upper end plate 23 flat. The inner peripheral wall of the second rib hole 233 is provided with a first support cone 234. The first support cone 234 is used to increase the contact area between the third upsetting head 212 and the upper end plate 23 to stably support the third upsetting head 212 so that the third upsetting head 212 is not easy to shake relative to the upper end plate 23.

[0045] When the first main reinforcement 21 is assembled with the upper end plate 23, the third swaging head 212 passes through the second anchor hole 231 from bottom to top, and then the upper end plate 23 is rotated, the first main reinforcement 21 moves to the other end of the second reinforcement hole 232, and the upper end plate 23 is lifted to clamp the third swaging head 212 in the second reinforcement hole 233, so that the first main reinforcement 21 and the upper end plate 23 are quickly assembled.

[0046] The connection structure between the second main rib 22 and the lower end plate 25 is the same as the connection structure between the first main rib 21 and the upper end plate 23, and will not be described in detail here.

[0047] Reference Figure 5 and Figure 6 The middle end plate 24 is connected with a first sleeve 30. The outer peripheral wall of the lower end of the first sleeve 30 is provided with a first external thread 32. The middle end plate 24 is provided with a first threaded hole 241 with an opening facing upward. The first external thread 32 is threadedly connected with the first threaded hole 241 to connect the first sleeve 30 to the middle end plate 24. The lower end of the first main rib 21 penetrates into the first sleeve 30. The lower end of the first sleeve 30 is provided with a first countersunk hole 31. The diameter of the first countersunk hole 31 is larger than the inner hole diameter of the first sleeve 30. The lower end of the first main rib 21 is provided with a first upsetting head 211. The diameter of the first upsetting head 211 is larger than the inner hole diameter of the first sleeve 30 and not larger than the diameter of the first countersunk hole 31. The depth of the first countersunk hole 31 is larger than the thickness of the first upsetting head 211, so that the first upsetting head 211 can be clamped in the first countersunk hole 31, so as to connect the first main rib 21 to the middle end plate 24 through the first sleeve 30. A second supporting cone 34 is provided at the bottom of the first countersunk hole 31, and the second supporting cone 34 is used to increase the contact area between the first upsetting head 211 and the first sleeve 30, so as to stably support the first upsetting head 211, so that the first upsetting head 211 is not easy to shake relative to the first sleeve 30. A first driving part 33 is provided at the upper end of the first sleeve 30, and the first driving part 33 is arranged in a regular hexagonal shape, so as to facilitate the use of a wrench to tighten the first sleeve 30, so that the first sleeve 30 and the middle end plate 24 are more firmly connected.

[0048] The second main rib 22 is connected to the middle end plate 24 through the second sleeve 40. The connection structure between the second main rib 22 and the middle end plate 24 is similar to the connection structure between the first main rib 21 and the middle end plate 24, and will not be described in detail here.

[0049] Reference Figure 1 and Figure 5The first sleeve 30 and the second sleeve 40 are respectively threadedly connected to the upper and lower sides of the middle end plate 24. The first sleeve 30 and the second sleeve 40 are sequentially spaced along the circumference of the middle end plate 24. The distance from the first sleeve 30 to the two adjacent second sleeves 40 is equal, and the distance from the second sleeve 40 to the two adjacent first sleeves 30 is equal. When the outer diameter of the lower end of the first pile column section 11 is equal to the outer diameter of the upper end of the second pile column section 12, the distance from the first sleeve 30 to the axis of the middle end plate 24 is equal to the distance from the second sleeve 40 to the axis of the middle end plate 24.

[0050] Reference Figure 2 and Figure 7 When the outer diameter of the lower end of the first pile column section 11 is larger than the outer diameter of the upper end of the second pile column section 12 , the distance from the first sleeve 30 to the axis of the middle end plate 24 is larger than the distance from the second sleeve 40 to the axis of the middle end plate 24 .

[0051] Reference Figure 8 Alternatively, when the outer diameter of the lower end of the first pile column section 11 is larger than the outer diameter of the upper end of the second pile column section 12, the lower end of the first main reinforcement 21 can also be connected to the middle end plate 24 through the anchor hole structure. Specifically, the lower end of the first main reinforcement 21 is provided with a first ridge 211, and the anchor hole structure includes a first anchor hole 242, a first ridge hole 243 and a first ridge hole 244. The first anchor hole 242, the first ridge hole 243 and the first ridge hole 244 all penetrate the middle end plate 24 in the axial direction. The first anchor hole 242 is a threaded hole, and the diameter of the first anchor hole 242 is larger than the diameter of the first ridge 211. The first ridge hole 243 is arranged in a long strip shape and extends circumferentially along the middle end plate 24. The width of the first ridge hole 243 is larger than the diameter of the first main reinforcement 24 and smaller than the diameter of the first ridge 211. One end of the first ridge hole 243 is connected to the first anchor hole 242. The first rib hole 244 is connected to the other end of the first rib hole 243. The first rib hole 244 is a stepped hole. The maximum diameter of the first rib hole 244 is greater than the diameter of the first head 211. The minimum diameter of the first rib hole 244 is greater than the diameter of the first main rib 21 and smaller than the diameter of the first head 211, so that the first head 211 can pass through the first anchor hole 242 from the upper end surface of the middle end plate 24 and be clamped in the first rib hole 244 through the first rib hole 243. After the first head 211 is clamped in the first rib hole 244, a threaded member is connected in the first anchor hole 242 to prevent the first head 211 from passing out of the first anchor hole 242.

[0052] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A photovoltaic support pile, characterized in that: The invention comprises a pile column (10), wherein the pile column (10) comprises a first pile column section (11) and a second pile column section (12), wherein the first pile column section (11) and the second pile column section (12) are both prefabricated from concrete and formed integrally, the first pile column section (11) and the second pile column section (12) are both slender and extend vertically, the lower end of the first pile column section (11) is connected to the upper end of the second pile column section (12), the outer peripheral wall of the first pile column section (11) is gradually inclined outward from top to bottom, and the outer peripheral wall of the second pile column section (12) is gradually inclined inward from top to bottom.

2. The photovoltaic support pile according to claim 1, characterized in that: The cross-sectional shape of the first pile column section (11) and the second pile column section (12) is one of a circle, a polygon, a circular ring or a polygonal ring.

3. The photovoltaic support pile according to claim 2, characterized in that: The diameter or side length of the connection between the first pile column section (11) and the second pile column section (12) is consistent, and the outer contour of the upper end surface of the second pile column section (12) is concentrically arranged with the outer contour of the lower end surface of the first pile column section (11).

4. The photovoltaic support pile according to claim 2, characterized in that: The cross-sectional shape of the first pile column section (11) is the same as the cross-sectional shape of the second pile column section (12); the diameters or side lengths of the connection between the first pile column section (11) and the second pile column section (12) are inconsistent; the outer contour of the upper end surface of the second pile column section (12) is concentrically arranged with the outer contour of the lower end surface of the first pile column section (11).

5. The photovoltaic support pile according to any one of claims 1 to 4, characterized in that: The first pile column section (11) and the second pile column section (12) are both arranged in a frustum shape.

6. The photovoltaic support pile according to claim 1, characterized in that: The pile column (10) is prefabricated in one piece.

7. The photovoltaic support pile according to claim 6, characterized in that: The first pile column section (11) and the second pile column section (12) are both arranged in a frustum shape. A steel cage (20) is pre-embedded in the pile column (10). The steel cage (20) comprises a plurality of first main bars (21), a plurality of second main bars (22), a first stirrup and a second stirrup. The first main bars (21) extend from the upper end to the lower end of the first pile column section (11). The plurality of first main bars (21) are evenly distributed in the circumferential direction and arranged in a radial frustum shape. The first stirrup is fixed around and on the frustum formed by the plurality of first main bars (21). The frustum formed by the plurality of first main bars (21) is located on the first The second main reinforcement (22) is arranged in the pile column section (11) and has an inclination angle the same as that of the first pile column section (11); the second main reinforcement (22) extends from the upper end to the lower end of the second pile column section (12); a plurality of the second main reinforcements (22) are evenly distributed along the circumference and are arranged in a radial frustum shape; the second hoop reinforcement is fixed around the frustum formed by the plurality of the second main reinforcements (22); the frustum formed by the plurality of the second main reinforcements (22) is located in the second pile column section (12) and has an inclination angle the same as that of the second pile column section (12); the lower end of the first main reinforcement (21) is connected to the upper end of the second main reinforcement (22).

8. The photovoltaic support pile according to claim 7, characterized in that: The pile column (10) further comprises an upper end plate (23) located at the upper end of the first pile column section (11), an intermediate end plate (24) located at the connection between the first pile column section (11) and the second pile column section (12), and a lower end plate (25) located at the lower end of the second pile column section (12); the upper end plate (23) is connected to the upper end of the first main reinforcement (21) to provide an upward tensioning force for the first main reinforcement (21); the lower end of the first main reinforcement (21) and the upper end of the second main reinforcement (22) are respectively connected to two ends of the intermediate end plate (24); and the lower end plate (25) is connected to the lower end of the second main reinforcement (22) to provide a downward tensioning force for the second main reinforcement (22).

9. The photovoltaic support pile according to claim 8, characterized in that: The intermediate end plate (24) is connected to a first sleeve (30), a first external thread (32) is provided on an outer peripheral wall of the lower end of the first sleeve (30), the intermediate end plate (24) is provided with a first threaded hole (241) matched with the first external thread (32), a first countersunk hole (31) with an opening facing downward is provided at the lower end of the first sleeve (30), the diameter of the first countersunk hole (31) is larger than the inner hole diameter of the first sleeve (30), and a first upsetting head (211) is provided at the lower end of the first main rib (21), and the first upsetting head (211) can be clamped in the first countersunk hole (31); The intermediate end plate (24) is connected to a second sleeve (40), the outer peripheral wall of the upper end of the second sleeve (40) is provided with a second external thread, the intermediate end plate (24) is provided with a second threaded hole matching the second external thread, the lower end of the second sleeve (40) is provided with a second countersunk hole with an opening facing upward, the diameter of the second countersunk hole is larger than the inner hole diameter of the second sleeve (40), the upper end of the second main rib (22) is provided with a second upsetting head, the second upsetting head can be clamped in the second countersunk hole, and the first sleeve (30) and the second sleeve (40) are arranged in sequence along the circumference of the intermediate end plate (24) at intervals.

10. The photovoltaic support pile according to claim 8, characterized in that: The middle end plate (24) is provided with an anchor hole structure connected to the first main reinforcement (21); the lower end of the first main reinforcement (21) is provided with a first swaging head (211); the anchor hole structure comprises a first anchor hole (242), a first reinforcement hole (243) and a first reinforcement hole (244); the first anchor hole (242), the first reinforcement hole (243) and the first reinforcement hole (244) all penetrate the middle end plate (24) along the axial direction; the first anchor hole (242) is a threaded hole; the first reinforcement hole (243) is a threaded hole; the first reinforcement hole (24 ...2) is a threaded hole; the first reinforcement hole (243) is a threaded hole; the first reinforcement hole (244) is a threaded hole. The hole (243) is arranged in a long strip shape and extends along the circumference of the middle end plate (24); one end of the first rib hole (243) is connected to the first anchor hole (242); the first rib hole (244) is connected to the other end of the first rib hole (243); the first rib hole (244) is a stepped hole; the first ram head (211) can penetrate the first anchor hole (242) from the lower end surface of the middle end plate and be clamped in the first rib hole (244) through the first rib hole (243); The intermediate end plate (24) is provided with a second sleeve (40) connected to the second main rib (22); a second external thread is provided on the outer peripheral wall of the upper end of the second sleeve (40); the intermediate end plate (24) is provided with a second threaded hole matching the second external thread; a second countersunk hole with an opening facing upward is provided at the lower end of the second sleeve (40); the diameter of the second countersunk hole is larger than the inner hole diameter of the second sleeve (40); a second upsetting head is provided at the upper end of the second main rib (22); the second upsetting head can be snapped into the second countersunk hole.

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