Offshore photovoltaic foundation and offshore photovoltaic system

Abstract

The invention relates to the technical field of photovoltaic, and discloses an offshore photovoltaic foundation and an offshore photovoltaic system.The offshore photovoltaic foundation comprises vertical piles, connecting assemblies and horizontal beams, the at least three vertical piles are suitable for being vertically arranged in the sea, photovoltaic assemblies are suitable for being installed on the tops of the vertical piles, the connecting assemblies are installed on the vertical piles, and the horizontal beams are arranged on the connecting assemblies. According to the rigid frame structure, the at least three vertical piles and the horizontal beams are connected through the connecting assemblies to form the whole rigid frame body, the overall rigidity of the rigid frame structure is large, the rigidity of the rigid frame structure is improved, and the rigidity of the rigid frame structure is improved. Especially, due to rigid connection of the vertical piles and the horizontal beams, the bending moment can be redistributed in the structure, the horizontal beams bear the bending moment transmitted by the vertical piles, the bending moment of the vertical piles is reduced, the deformation resistance of the horizontal beams is exerted, and various offshore photovoltaic loads can be effectively resisted.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to an offshore photovoltaic foundation and an offshore photovoltaic system. Background Art

[0002] Photovoltaic power generation systems use the photovoltaic effect of photovoltaic cells to directly convert solar radiation into electricity. Offshore photovoltaic power generation involves moving photovoltaic power stations from land to sea, utilizing marine resources to generate electricity.

[0003] Existing offshore photovoltaic support foundation structures typically extend the existing onshore photovoltaic support foundations. Monopile structures are often used for offshore waters within three meters of depth. As offshore photovoltaics expand into deeper waters, the increased water depth leads to a dramatic increase in horizontal loads. Due to the poor resistance of traditional monopile structures, they are unable to meet the requirements of deep-water applications. Summary of the Invention

[0004] In view of this, the present invention provides an offshore photovoltaic foundation and an offshore photovoltaic system to solve the problem in the prior art that the traditional single pile structure cannot meet the requirements of deep-water photovoltaic support foundations.

[0005] In the first aspect, the present invention provides an offshore photovoltaic foundation, including vertical piles, connecting components and horizontal beams, at least three vertical piles are suitable for being vertically arranged in the sea, the tops of the vertical piles are suitable for installing photovoltaic components, the connecting components are installed on the vertical piles, at least two first connecting parts are provided on the connecting components, and the two ends of the horizontal beam are respectively connected to the first connecting parts on two adjacent connecting components.

[0006] Beneficial effects: The present invention adopts a connecting component to connect at least three vertical piles and horizontal beams through the connecting component to form a rigid frame as a whole. The overall rigidity of the rigid frame structure is large, and the ability of the structure as a whole to resist bending moment, axial force, and shear force can be brought into play. In particular, due to the rigid connection between the vertical piles and the horizontal beams, the bending moment can be redistributed within the structure, so that the horizontal beams bear the bending moment transmitted by the vertical piles, reducing the bending moment of the vertical columns, and exerting the anti-variability ability of the horizontal beams, which can effectively resist various loads of offshore photovoltaics.

[0007] In an optional embodiment, the connecting assembly includes a mounting portion, the mounting portion is sleeved on the outside of the vertical pile, and the first connecting portion is arranged outside the mounting portion.

[0008] Beneficial effects: The present invention connects the horizontal beam by sleeve-mounting the mounting portion on the outside of the vertical pile. The beam system composed of the horizontal beam and the connecting assembly can be prefabricated on land to form a pile driving frame. When the vertical piles are driven at sea, the connecting assembly can be used to well control the driving accuracy of the vertical piles.

[0009] In an optional embodiment, a second connecting portion is provided at each end of the horizontal beam, and the second connecting portion is connected to the first connecting portion.

[0010] Beneficial effect: The at least two first connection parts provided on the mounting part of the present invention facilitate rigid connection with the second connection part on the horizontal beam, so that the vertical piles and the horizontal beam are connected to form a steel frame as a whole of the frame structure, which can effectively resist various loads of offshore photovoltaics.

[0011] In an optional embodiment, end plates are respectively provided at both ends of the horizontal beam, and the second connecting portion is provided on the end plates.

[0012] Beneficial effects: The present invention arranges end plates at both ends of the horizontal beam, which can seal the two ends of the horizontal beam made of PHC material, prevent seawater from corroding the interior of the horizontal beam, and at the same time, the end plates facilitate the firm connection of the second connecting part to the horizontal beam.

[0013] In an optional embodiment, a first mounting hole is provided on the first connecting portion, a second mounting hole is provided on the second connecting portion, and the connecting member is installed in the first mounting hole and the second mounting hole.

[0014] In an optional embodiment, the first mounting hole and / or the second mounting hole is a strip-shaped hole, and the strip-shaped hole extends along the axial direction of the horizontal beam.

[0015] Beneficial effect: The present invention sets the first mounting hole and / or the second mounting hole as a strip hole, which is convenient for adjusting the construction deviation of the vertical pile.

[0016] In an optional embodiment, the mounting portion includes an arc portion and a bent portion, the arc portion is sleeved on the outside of the vertical pile, the bent portion is connected to the end of the arc portion, the bent portion extends away from the vertical pile, and a third mounting hole is provided on the bent portion.

[0017] In a second aspect, the present invention further provides an offshore photovoltaic system comprising at least one of the above-mentioned offshore photovoltaic foundations and photovoltaic modules, wherein the photovoltaic modules are installed on top of vertical piles.

[0018] In an optional embodiment, the photovoltaic assembly includes a mounting frame and a photovoltaic string, a plurality of mounting frames are installed on top of the vertical pile, and the photovoltaic strings are installed on adjacent mounting frames.

[0019] Beneficial effects: The vertical pile top mounting frame of the present invention can use traditional photovoltaic brackets. Compared with the existing concrete single pile + large grid structure, it can greatly reduce the amount of steel used in the mounting frame. The installation of the mounting frame does not require large-scale offshore equipment. The installation operation is more flexible and easier to organize on-site construction, reducing the risk of project implementation.

[0020] In an optional embodiment, the photovoltaic strings are arranged on mounting frames of at least two adjacent offshore photovoltaic foundations.

[0021] Beneficial effects: The present invention arranges photovoltaic strings on mounting frames of at least two adjacent offshore photovoltaic foundations, which can improve the power generation efficiency of the offshore photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a front view of an offshore photovoltaic foundation according to an embodiment of the present invention;

[0024] Figure 2 This is a side view of an offshore photovoltaic foundation according to an embodiment of the present invention;

[0025] Figure 3 A side view of another offshore photovoltaic foundation according to an embodiment of the present invention;

[0026] Figure 4 A top view of an offshore photovoltaic foundation according to an embodiment of the present invention;

[0027] Figure 5 A top view of another offshore photovoltaic foundation according to an embodiment of the present invention;

[0028] Figure 6 This is an enlarged schematic diagram of the AA in an offshore photovoltaic foundation according to an embodiment of the present invention;

[0029] Figure 7 This is an enlarged schematic diagram of the middle BB of an offshore photovoltaic foundation according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Vertical pile;

[0032] 2. Connecting assembly; 21. First connecting portion; 211. First mounting hole; 22. Mounting portion; 221. Arc portion; 222. Bend portion; 23. Reinforcement rib;

[0033] 3. Horizontal beam; 31. Second connecting portion; 32. End plate;

[0034] 4. Connectors;

[0035] 100. Offshore photovoltaic infrastructure;

[0036] 200. Photovoltaic module; 201. Mounting frame; 202. Photovoltaic string. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0038] Existing offshore photovoltaic systems using single pile foundations have a very limited water depth range. The densely packed piles significantly increase civil engineering costs and construction difficulty, and the dense pile clusters can also significantly damage the marine environment and ecosystem. Single piles have poor resistance to horizontal forces (especially bending moments), and corrosion resistance is also a significant issue.

[0039] The following combination Figures 1 to 7 , describing embodiments of the present invention.

[0040] According to an embodiment of the present invention, on the one hand, Figures 1 to 7 As shown, an offshore photovoltaic foundation 100 is provided, including vertical piles 1, connecting components 2 and horizontal beams 3, at least three vertical piles 1 are suitable for being vertically arranged in the sea, the tops of the vertical piles 1 are suitable for installing photovoltaic components 200, the connecting components 2 are installed on the vertical piles 1, and at least two first connecting parts 21 are provided on the connecting components 2, and the two ends of the horizontal beam 3 are respectively connected to the first connecting parts 21 on two adjacent connecting components 2.

[0041] Specifically, in this embodiment, the material of the vertical piles 1 and horizontal beams 3 is not specifically limited. For example, in this embodiment, the vertical piles 1 and horizontal beams 3 are made of prestressed high-strength concrete (PHC) pipe piles. PHC pipe piles have strong corrosion resistance in marine environments and can solve corrosion problems by themselves or with some anti-corrosion measures. They can achieve better corrosion protection than steel pipe columns and reduce maintenance work on the final equipment. Concrete structures are also low-cost, and the sand, stone, cement, and steel used are relatively simple to obtain. The production cost of PHC pipe piles is more than twice that of steel structures with the same rigidity, making them inexpensive. PHC pipe piles can be made of some leftover materials from the real estate industry, and the remaining PHC materials can be reused.

[0042] In this embodiment, the number of vertical piles 1 is not specifically limited. For example, Figure 1As shown, in this embodiment, there are four vertical piles 1. The bottom of the vertical piles 1 is vertically installed in the seabed mud surface, and the top of the vertical pile 1 protrudes above sea level. A connecting assembly 2 is provided in the middle of each vertical pile 1. Each connecting assembly 2 is provided with two first connecting portions 21. The angle between the two first connecting portions 21 is 90 degrees. There are also four horizontal beams 3, and each horizontal beam 3 connects the first connecting portions 21 on adjacent vertical piles 1. The four vertical piles 1 and the four horizontal beams 3 enclose a rectangular frame structure. In other embodiments, the number of vertical piles 1 can also be three, six, or other numbers. The three vertical piles 1 and the three horizontal beams 3 enclose a frame structure with a triangular cross-section; the six vertical piles 1 and the seven horizontal beams 3 enclose a frame structure with two adjacent rectangular cross-sections.

[0043] In this embodiment, the distance between two adjacent vertical piles 1 in the length direction is 7m to 9m, and the distance between two adjacent vertical piles 1 in the width direction is 6m to 8m.

[0044] In this embodiment, Figure 1 As shown, two photovoltaic assemblies 200 are provided, and each photovoltaic assembly 200 is installed on top of two adjacent vertical piles 1 in the length direction. The length of the photovoltaic assembly 200 is greater than the distance between the two adjacent vertical piles 1.

[0045] In this embodiment, during the construction of the offshore photovoltaic foundation 100, the beam system composed of the horizontal beam 3 and the connecting assembly 2 can be prefabricated on land to form a pile frame. When the vertical piles 1 are driven at sea, the connecting assembly 2 can be used to well control the driving accuracy of the vertical piles 1.

[0046] The present invention adopts a connecting component 2 to connect at least three vertical piles 1 and a horizontal beam 3 through the connecting component 2 to form a rigid frame as a whole. The overall rigidity of the rigid frame structure is large, and the ability of the structure as a whole to resist bending moment, axial force, and shear force can be brought into play. In particular, due to the rigid connection between the vertical piles 1 and the horizontal beams 3, the bending moment can be redistributed within the structure, so that the horizontal beams 3 bear the bending moment transmitted by the vertical piles 1, reduce the bending moment of the vertical columns, and exert the anti-variability ability of the horizontal beams 3, which can effectively resist various loads of offshore photovoltaics.

[0047] In one embodiment, Figure 6 As shown, the connection assembly 2 includes a mounting portion 22 , which is sleeved on the outside of the vertical pile 1 , and the first connection portion 21 is arranged outside the mounting portion 22 .

[0048] Specifically, in this embodiment, the mounting portion 22 is detachably mounted on the outside of the vertical pile 1 , and the two first connecting portions 21 are arranged at an angle of 90 degrees on the outside of the mounting portion 22 .

[0049] The present invention connects the horizontal beam 3 by sleeve-arranging the mounting portion 22 on the outside of the vertical pile 1. The beam system composed of the horizontal beam 3 and the connecting component 2 can be prefabricated on land to form a pile driving frame. When the vertical pile 1 is driven at sea, the connecting component 2 can be used to well control the driving accuracy of the vertical pile 1.

[0050] In one embodiment, Figure 6 and Figure 7 As shown, a second connecting portion 31 is provided at both ends of the horizontal beam 3 , and the second connecting portion 31 is connected to the first connecting portion 21 .

[0051] Specifically, in this embodiment, a second connection part 31 is respectively provided at both ends of the horizontal beam 3. In this embodiment, the first connection part 21 and the second connection part 31 are not specifically limited. For example, in this embodiment, the first connection part 21 and the second connection part 31 adopt short-section steel pipes, wherein the inner diameter of the first connection part 21 matches the outer diameter of the second connection part 31, and the second connection part 31 is sleeved inside the first connection part 21 during installation.

[0052] The at least two first connection parts 21 provided on the mounting part 22 of the present invention facilitate rigid connection with the second connection part 31 on the horizontal beam 3, so that the vertical pile 1 and the horizontal beam 3 are connected to form a steel frame as a whole of the frame structure, which can effectively resist various loads of offshore photovoltaics.

[0053] In one embodiment, Figure 6 and Figure 7 As shown, end plates 32 are respectively provided at both ends of the horizontal beam 3 , and the second connecting portion 31 is provided on the end plates 32 .

[0054] Specifically, the outer diameter of the end plate 32 in this embodiment matches the outer diameter of the horizontal beam 3, and the end plate 32 is fixed to both ends of the horizontal beam 3. In this embodiment, the end plate 32 can be made of steel plate, and the second connecting portion 31 is welded to the side of the end plate 32 away from the horizontal beam 3.

[0055] The present invention sets end plates 32 at both ends of the horizontal beam 3, which can seal the two ends of the horizontal beam 3 made of PHC material to prevent seawater from corroding the interior of the horizontal beam 3. At the same time, the end plates 32 facilitate the firm connection of the second connecting part 31 to the horizontal beam 3.

[0056] In one embodiment, Figure 6 and Figure 7 As shown, a first mounting hole 211 is provided on the first connecting portion 21 , a second mounting hole is provided on the second connecting portion 31 , and the connecting member 4 is installed in the first mounting hole 211 and the second mounting hole.

[0057] Specifically, in this embodiment, a plurality of first mounting holes 211 are circumferentially provided on the first connecting portion 21 , a corresponding number of second mounting holes are circumferentially provided on the second connecting portion 31 , and the connecting member 4 is a high-strength bolt.

[0058] In this embodiment, the connection assembly 2 is connected to the vertical pile 1 and the horizontal beam 3 with equal strength rigidity.

[0059] In one embodiment, Figure 6 and Figure 7 As shown, the first mounting hole 211 and / or the second mounting hole are strip-shaped holes, and the strip-shaped holes extend along the axial direction of the horizontal beam 3 .

[0060] Specifically, in this embodiment, the first mounting hole 211 is a strip-shaped hole extending along the axial direction of the horizontal beam 3. During the driving of the vertical piles 1, if there is a construction error in some vertical piles 1, the horizontal beam 3 can be adjusted by adjusting the position of the connector 4 in the first mounting hole 211.

[0061] In some other embodiments, the second mounting hole may be configured as a bar-shaped hole, or both the first mounting hole 211 and the second mounting hole may be configured as bar-shaped holes.

[0062] In the present invention, the first mounting hole 211 and / or the second mounting hole are configured as strip-shaped holes, so as to facilitate adjustment of the construction deviation of the vertical pile 1 .

[0063] In one embodiment, Figure 7 As shown, the mounting portion 22 includes an arc portion 221 and a bent portion 222. The arc portion 221 is sleeved on the outside of the vertical pile 1. The bent portion 222 is connected to the end of the arc portion 221. The bent portion 222 extends away from the vertical pile 1. A third mounting hole is provided on the bent portion 222.

[0064] Specifically, in this embodiment, the mounting portion 22 can be made of a rectangular steel plate. The length of the steel plate is greater than the outer diameter of the vertical pile 1, and its width is greater than the outer diameter of the first mounting portion 22. During processing, the middle part of the steel plate is processed into an arc-shaped portion 221 that matches the shape of the vertical pile 1, and the two ends of the steel plate are bent into bent portions 222 connected to the arc-shaped portion 221. A rounded transition is used between the bent portion 222 and the arc-shaped portion 221 to avoid stress concentration.

[0065] In this embodiment, the bent portion 222 is vertically provided with a plurality of third mounting holes, in which the connector 4 is installed. In this embodiment, the number of the third mounting holes is not specifically limited. For example, in this embodiment, four third mounting holes are provided, and the distance between adjacent third mounting holes is 100 mm.

[0066] In this embodiment, Figure 6 and Figure 7 As shown, a reinforcing rib 23 is provided between the bent portion 222 and the arc portion 221 . The reinforcing rib 23 is arranged horizontally and installed between adjacent third mounting holes.

[0067] According to an embodiment of the present invention, on the other hand, Figures 1 to 5As shown, an offshore photovoltaic system is also provided, comprising at least one of the above-mentioned offshore photovoltaic foundations 100 and a photovoltaic assembly 200 , wherein the photovoltaic assembly 200 is installed on top of a vertical pile 1 .

[0068] Specifically, in this embodiment, the number of offshore photovoltaic foundations 100 is not specifically limited. For example, Figure 2 and Figure 4 As shown, in this embodiment, there are two offshore photovoltaic foundations 100, and the photovoltaic components 200 are installed on top of the two offshore photovoltaic foundations 100.

[0069] In some other embodiments, only one offshore photovoltaic foundation 100 may be provided, and the photovoltaic assembly 200 may be installed on top of the single offshore photovoltaic foundation 100 .

[0070] The present invention adopts a connecting component 2 to connect four vertical piles 1 and a horizontal beam 3 through the connecting component 2 to form a rectangular rigid frame as a whole. The overall rigidity of the rigid frame structure is large, and the ability of the structure as a whole to resist bending moment, axial force, and shear force can be brought into play. In particular, due to the rigid connection between the vertical piles 1 and the horizontal beams 3, the bending moment can be redistributed within the structure, so that the horizontal beams 3 bear the bending moment transmitted by the vertical piles 1, reduce the bending moment of the vertical columns, and exert the anti-variability ability of the horizontal beams 3, which can effectively resist various loads of offshore photovoltaics.

[0071] In one embodiment, Figure 1 As shown, the photovoltaic assembly 200 includes a mounting frame 201 and a photovoltaic string 202 . A plurality of mounting frames 201 are installed on top of the vertical pile 1 , and the photovoltaic strings 202 are installed on adjacent mounting frames 201 .

[0072] Specifically, in this embodiment, the number of mounting brackets 201 is the same as the number of vertical piles 1. A mounting bracket 201 is mounted on the top of each vertical pile 1. The mounting bracket 201 includes two vertical columns and two clamps. The two columns are arranged vertically, and the two clamps are arranged between the two columns. The clamps are connected to the upper ends of the vertical piles 1. The mounting bracket 201 also includes a crossbeam and a diagonal brace. The crossbeam is fixed at an angle to the top of the two columns. The two diagonal braces are respectively connected to the bottom of the columns and the crossbeam. A purlin is provided on the top of the crossbeam, and the photovoltaic strings 202 are mounted on the purlin.

[0073] The top mounting frame 201 of the vertical pile 1 of the present invention can use a traditional photovoltaic bracket. Compared with the existing single pile + large grid structure, the amount of steel used in the mounting frame 201 can be greatly reduced. The installation of the mounting frame 201 does not require large-scale offshore equipment. The installation operation is more flexible, and it is easier to organize on-site construction, reducing the risk of project implementation.

[0074] In one embodiment, Figure 2 and Figure 4 As shown, the photovoltaic strings 202 are arranged on the mounting frames 201 of at least two adjacent offshore photovoltaic foundations 100 .

[0075] Specifically, in this embodiment, the photovoltaic strings 202 are not specifically limited. For example, in this embodiment, the photovoltaic strings 202 can be arranged in a 2×26 or 2×27 photovoltaic panel string arrangement. Two photovoltaic strings 202 form a group and are installed on top of two adjacent offshore photovoltaic foundations 100.

[0076] In some other embodiments, the photovoltaic strings 202 may also be arranged in a 2×13 or 2×14 photovoltaic panel string arrangement. Two photovoltaic strings 202 form a group and are installed on top of a single offshore photovoltaic foundation 100 .

[0077] The present invention arranges the photovoltaic strings 202 on the mounting frames 201 of at least two adjacent offshore photovoltaic foundations 100, thereby improving the power generation efficiency of the offshore photovoltaic system.

[0078] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An offshore photovoltaic foundation, characterized in that: include: Vertical piles (1), at least three of the vertical piles (1) are suitable for being vertically arranged in the sea, and the tops of the vertical piles (1) are suitable for installing photovoltaic modules (200); A connecting assembly (2), the connecting assembly (2) being mounted on the vertical pile (1), the connecting assembly (2) being provided with at least two first connecting portions (21); A horizontal beam (3), wherein both ends of the horizontal beam (3) are respectively connected to the first connection parts (21) on two adjacent connection assemblies (2), and the horizontal beam (3) and the vertical piles (1) are combined into a space frame structure.

2. The offshore photovoltaic foundation according to claim 1, characterized in that: The connecting component (2) comprises: The mounting portion (22) is sleeved on the outside of the vertical pile (1), and the first connecting portion (21) is arranged outside the mounting portion (22).

3. The offshore photovoltaic foundation according to claim 1 or 2, characterized in that: The horizontal beam (3) is provided with a second connecting portion (31) at both ends, and the second connecting portion (31) is connected to the first connecting portion (21).

4. The offshore photovoltaic foundation according to claim 3, characterized in that: End plates (32) are respectively provided at both ends of the horizontal beam (3), and the second connecting portion (31) is arranged on the end plates (32).

5. The offshore photovoltaic foundation according to claim 3, characterized in that: The first connecting portion (21) is provided with a first mounting hole (211), the second connecting portion (31) is provided with a second mounting hole, and the connecting member (4) is installed in the first mounting hole (211) and the second mounting hole.

6. The offshore photovoltaic foundation according to claim 5, characterized in that: The first mounting hole (211) and / or the second mounting hole are strip-shaped holes, and the strip-shaped holes extend along the axial direction of the horizontal beam (3).

7. The offshore photovoltaic foundation according to claim 2, characterized in that: The mounting portion (22) includes: An arc-shaped portion (221), wherein the arc-shaped portion (221) is sleeved on the outside of the vertical pile (1); A bending portion (222), the bending portion (222) is connected to the end of the arc portion (221), the bending portion (222) extends in a direction away from the vertical pile (1), and a third mounting hole is provided on the bending portion (222).

8. An offshore photovoltaic system, characterized in that: include: At least one offshore photovoltaic foundation (100) according to any one of claims 1 to 7; A photovoltaic assembly (200) is installed on top of the vertical pile (1).

9. The offshore photovoltaic system according to claim 8, characterized in that: The photovoltaic assembly (200) comprises: A mounting frame (201), wherein a plurality of the mounting frames (201) are mounted on the top of the vertical pile (1); A photovoltaic string (202), wherein the photovoltaic string (202) is mounted on an adjacent mounting frame (201).

10. The offshore photovoltaic system according to claim 9, characterized in that: The photovoltaic strings (202) are arranged on the mounting frames (201) of at least two adjacent offshore photovoltaic foundations (100).

Images