Offshore photovoltaic large-span inverted triangular arch truss cable supporting structure system

Abstract

The invention discloses an offshore photovoltaic large-span inverted triangular arch truss cable supporting structure system, which belongs to the field of offshore photovoltaic power generation and comprises triangular supporting structures arranged on the side surfaces of steel pipe piles of a photovoltaic support platform and inverted triangular arch trusses arranged on the triangular supporting structures. The inverted triangular arch truss is arched between the front photovoltaic array and the rear photovoltaic array; after the inverted triangular arch truss is arched, the upper chord of the inverted triangular arch truss is tangent to the connecting line of the front and rear arrays; the inverted triangular arch truss penetrates through the lower ends of the front photovoltaic array and the rear photovoltaic array and is horizontally arranged; cables are laid on the two sides of the upper end of the inverted triangular arch truss, and a maintenance footpath area is arranged between the cables laid on the two sides. According to the method, the bearing requirement of direct cable laying can be met, the clearance requirement of bottom ship navigation can be met, meanwhile, the situation that the generating capacity is reduced due to the fact that an arch structure shields the assembly is avoided, safe and reliable construction and operation of an offshore photovoltaic power station can be achieved, meanwhile, pile foundations are saved, and the engineering cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of offshore photovoltaic power generation, and in particular to an offshore photovoltaic large-span inverted triangle arch truss cable support structure system. Background Art

[0002] With the urgent global demand for renewable energy and the gradual implementation of the policy of co-location of wind and solar power at sea, the photovoltaic industry is developing rapidly from land areas to shallow seas and even deep sea areas. Cables, as the key system connecting various power generation units, are distributed in every corner of the entire photovoltaic field. In order to avoid the shading of the front and rear photovoltaic arrays, a certain distance is opened between the photovoltaic brackets in the north-south direction, which can not only avoid the shading of the front and rear shadows, but also serve as a construction and operation and maintenance channel; therefore, the north-south cable support system must not only meet the basic requirements of stable transmission of electric energy by cables, but also consider the navigation requirements of ships during the construction and operation of offshore photovoltaic power stations. Therefore, a cable support system that can adapt to the above two requirements is needed.

[0003] Traditional cable support structure systems, such as using steel beam structures, have limited spans and need to set up supporting pile foundations at certain intervals (within 10m), and a bridge or trough box needs to be installed on the upper part of the steel beam. If ordinary truss structures are used, in addition to setting up pile foundations, the height of the truss occupies the net height of the bottom, affecting the navigation of ships during construction and operation and maintenance, and it is difficult to meet the use requirements. In addition, the construction of offshore pile foundations is difficult, with large errors and high construction costs. Therefore, it is difficult to meet the use functions and construction requirements of offshore photovoltaic systems using traditional steel beam structures and ordinary truss structures. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an offshore photovoltaic large-span inverted triangular arch truss cable support structure system. The system adopts an inverted triangular arch truss structure supported on a photovoltaic array pile foundation, which can not only meet the load-bearing requirements for direct cable laying, but also meet the clearance requirements for bottom navigation of ships, while avoiding the reduction in power generation caused by the arch structure blocking the components, and can realize the safe and reliable construction and operation of the offshore photovoltaic power station, while saving pile foundations and reducing project costs.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: An offshore photovoltaic large-span inverted triangular arch truss cable support structure system comprises a triangular support structure arranged on the side of each steel pipe pile of a photovoltaic support platform and an inverted triangular arch truss arranged on the triangular support structure; the inverted triangular arch truss is arched between a front photovoltaic array and a rear photovoltaic array; after the inverted triangular arch truss is arched, the upper chord of the inverted triangular arch truss is tangent to the line connecting the front and rear arrays; the inverted triangular arch truss passes through the lower ends of the front photovoltaic array and the rear photovoltaic array and is horizontally arranged; cables are laid on both sides of the upper end of the inverted triangular arch truss, and a maintenance walkway area is arranged between the cables laid on both sides.

[0006] A further improvement of the technical solution of the present invention is that the triangular support structure includes two horizontal beams symmetrically arranged on both sides of the steel pipe pile and two bottom diagonal braces for fixing the two horizontal beams; one end of the bottom diagonal brace is connected to the front end of the horizontal beam, and the other end is connected to the lower part of the steel pipe pile.

[0007] A further improvement of the technical solution of the present invention is that: crossbeam supports are symmetrically arranged on both sides of the steel pipe piles, and diagonal brace supports are symmetrically arranged on both sides of the lower ends of the crossbeam supports; one end of the horizontal crossbeam is connected to the crossbeam support through an angle steel connector, and the other end of the bottom diagonal brace is connected to the diagonal brace support; a horizontal connecting section is arranged at the connection between the bottom diagonal brace and the diagonal brace support.

[0008] A further improvement of the technical solution of the present invention is that: the horizontal beam, the angle steel connector and the beam support are all connected by bolts; the horizontal connecting section of the diagonal brace support and the bottom diagonal brace are connected by bolts; the horizontal beam and the bottom diagonal brace are connected by bolts.

[0009] A further improvement of the technical solution of the present invention is that a first horizontal support is cross-arranged between a horizontal beam arranged on one side of the steel pipe pile and a horizontal beam arranged on the other side of the steel pipe pile, and a second horizontal support is arranged at the upper end where the horizontal beam is connected to the bottom diagonal support.

[0010] A further improvement of the technical solution of the present invention is that: the first horizontal support is connected to the horizontal beam by bolts, and the second horizontal support is connected to the horizontal beam by bolts.

[0011] A further improvement of the technical solution of the present invention is that the inverted triangular arch truss includes a first upper chord and a second upper chord arranged in parallel, a lower chord is arranged in parallel at the lower ends of the first upper chord and the second upper chord, a horizontal web is arranged between the first upper chord and the second upper chord, and an inclined diagonal web is arranged between the first upper chord, the second upper chord and the lower chord.

[0012] A further improvement of the technical solution of the present invention is that: the inverted triangular arch truss is divided into a first horizontal section, an arch section and a second horizontal section between the rear pile of the front photovoltaic array support and the front pile of the rear photovoltaic array support; the length of the first horizontal section is the distance S1 between the arch truss arch point and the rear pile of the front array support, the horizontal width of the arch section is the arch width S2 of the arch truss, and the length of the second horizontal section is the distance S3 between the arch truss arch point and the front pile of the rear array support; when the first horizontal section is connected to the rear pile of the front photovoltaic array support, the first upper chord and the second upper chord are fixedly installed on the upper end of the horizontal beam arranged on the rear pile of the front photovoltaic array support through angle steel connectors and bolts; when the second horizontal section is connected to the front pile of the rear photovoltaic array support, the first upper chord and the second upper chord are fixedly installed on the upper end of the horizontal beam arranged on the front pile of the rear photovoltaic array support through angle steel connectors and bolts.

[0013] A further improvement of the technical solution of the present invention is that the width between the first upper chord and the second upper chord is the truss upper chord spacing B, and the truss upper chord spacing B is divided into the first cable laying area width b1, the maintenance walkway area width b2 and the second cable laying area width b3.

[0014] A further improvement of the technical solution of the present invention is that the structure of the inverted triangular arch truss is processed in sections in a factory by intersecting welding, and is spliced ​​on site after being transported to the dock.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: 1. The present invention adopts a large-span inverted triangle arch truss structure between the front and rear photovoltaic arrays, which not only increases the structural span and rigidity, improves the construction efficiency, but also saves the pile foundation engineering workload. At the same time, it can realize the direct laying of cables and ensure the navigation of ships at the bottom, while avoiding the reduction of power generation caused by the arch structure blocking the components.

[0016] 2. The large-span inverted triangle arch truss structure provided by the present invention is suitable for the supporting structure system of offshore cable laying. It has the advantages of convenient construction, stable structure, cost saving, and navigation. Compared with the traditional cable support system, it has significant advantages and application prospects in the construction of offshore photovoltaic power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 It is a schematic diagram of an offshore photovoltaic large-span inverted triangle arch truss cable support structure system provided in an embodiment of the present invention; Figure 2 AA is a schematic cross-sectional view of an inverted triangular arch truss cable support structure according to an embodiment of the present invention; Figure 3 DD is a cross-sectional schematic diagram of an inverted triangular arch truss cable support structure according to an embodiment of the present invention; Figure 4 Schematic diagram of the connection between the inverted triangle arch truss cable support structure and the steel pipe pile in an embodiment of the present invention; Figure 5 EE cross-sectional view of the connection between the inverted triangle arch truss cable support structure and the steel pipe pile in an embodiment of the present invention; Figure 6 Schematic diagram of the installation of angle steel connectors and bolts in an embodiment of the present invention; Among them, 1. front photovoltaic array; 1-1. front photovoltaic array support front pile; 1-2. front photovoltaic array support rear pile; 2. rear photovoltaic array; 2-1. rear photovoltaic array support front pile; 2-2. rear photovoltaic array support rear pile; 3. inverted triangle arch truss; 3-1. first upper chord; 3-2. second upper chord; 3-3. lower chord; 3-4. horizontal web member; 3-5. inclined diagonal web member; 4. front and rear array connection; 5. cable; 6. horizontal beam; 7. bottom diagonal brace; 8. first horizontal support; 9. angle steel connector; 10. bolt; 11. beam support; 12. diagonal brace support; 13. second horizontal support; L1, horizontal projection distance between front and rear arrays; L2, net horizontal projection distance between front and rear arrays; H, height of lower chord of arch truss from sea level; h, height of arch truss; S1, distance between arch starting point of arch truss and rear pile of front array support; S2, arch starting width of arch truss; S3, distance between arch starting point of arch truss and front pile of rear array support; α, inclination angle of photovoltaic array; B, spacing between upper chords of truss; b1, width of first cable laying area; b2, width of maintenance walkway area; b3, width of second cable laying area. DETAILED DESCRIPTION

[0018] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1-6 As shown, an offshore photovoltaic large-span inverted triangular arch truss cable support structure system includes a triangular support structure arranged on the side of each steel pipe pile of the photovoltaic support platform and an inverted triangular arch truss 3 arranged on the triangular support structure; the inverted triangular arch truss 3 is arched between the front photovoltaic array 1 and the rear photovoltaic array 2; after the inverted triangular arch truss 3 is arched, the upper chord of the inverted triangular arch truss 3 is tangent to the front and rear array connection line 4, thereby ensuring that the truss itself does not block the rear photovoltaic support platform, which can not only meet the navigation needs of ships during construction and maintenance, but also reduce the vertical deflection of the truss; the inverted triangular arch truss 3 passes through the lower ends of the front photovoltaic array 1 and the rear photovoltaic array 2 and is horizontally arranged; cables 5 are laid on both sides of the upper end of the inverted triangular arch truss 3, and an inspection walkway area is arranged between the cables 5 laid on both sides.

[0022] like Figure 1-2 As shown, the horizontal projection distance between the front and rear arrays of the front photovoltaic array 1 and the rear photovoltaic array 2 is L1, the net horizontal projection distance between the front and rear arrays of the front photovoltaic array 1 and the rear photovoltaic array 2 is L2, the height of the lower chord of the inverted triangular arch truss 3 from the sea level is H, the height of the arch truss of the inverted triangular arch truss 3 is h, and the photovoltaic array inclination angles of the front photovoltaic array 1 and the rear photovoltaic array 2 are α.

[0023] Further, such as Figure 4 , 5As shown, the triangular support structure includes horizontal beams 6 and bottom diagonal braces 7 symmetrically arranged on both sides of steel pipe piles (the steel pipe piles include front photovoltaic array support front piles 1-1, front photovoltaic array support rear piles 1-2, rear photovoltaic array support front piles 2-1 and rear photovoltaic array support rear piles 2-2, and the front photovoltaic array support rear piles 1-2 are used as an example for explanation), and the triangular support structure is bolted to the steel pipe piles through node plates.

[0024] Specifically, the triangular support structure includes two horizontal beams 6 symmetrically arranged on both sides of the steel pipe pile and two bottom diagonal braces 7 for fixing the two horizontal beams 6; one end of the bottom diagonal brace 7 is connected to the front end of the horizontal beam 6, and the other end is connected to the lower part of the steel pipe pile.

[0025] Further, such as Figure 4-5 As shown, cross beam supports 11 are symmetrically arranged on both sides of the steel pipe pile, and diagonal brace supports 12 are arranged below the cross beam supports 11; one end of the horizontal cross beam 6 is connected to the cross beam support 11 through an angle steel connector 9, and the other end of the bottom diagonal brace 7 is connected to the diagonal brace support 12; the front end of the horizontal cross beam 6 is connected to the other end of the bottom diagonal brace 7; a horizontal connecting section is arranged at the connection between the bottom diagonal brace 7 and the diagonal brace support 12.

[0026] Further, such as Figure 4-6 As shown, the horizontal beam 6, the angle steel connector 9 and the beam support 11 are all connected by bolts 10; the horizontal connecting section of the diagonal brace support 12 and the bottom diagonal brace 7 are connected by bolts 10; the horizontal beam 6 and the bottom diagonal brace 7 are connected by bolts 10.

[0027] Further, such as Figure 4-6 As shown, a first horizontal support 8 is cross-arranged between a horizontal beam 6 arranged on one side of the steel pipe pile and a horizontal beam 6 arranged on the other side of the steel pipe pile, and a second horizontal support 13 is arranged at the upper end where the horizontal beam 6 is connected to the bottom diagonal support 7, thereby increasing the overall stiffness of the support structure.

[0028] Further, such as Figure 4-6 As shown, the first horizontal support 8 is connected to the horizontal beam 6 via bolts 10 , and the second horizontal support 13 is connected to the horizontal beam 6 via bolts 10 .

[0029] In the present invention, all joints are connected by bolts, thus avoiding offshore welding processes; this support form can avoid separate piling of the cable support structure, thus saving engineering costs and construction period.

[0030] Further, such as Figure 1-3As shown, the inverted triangle arch truss 3 includes a first upper chord 3-1 and a second upper chord 3-2 arranged in parallel, a lower chord 3-3 is arranged in parallel at the lower ends of the first upper chord 3-1 and the second upper chord 3-2, a horizontal web 3-4 is arranged between the first upper chord 3-1 and the second upper chord 3-2, and an inclined diagonal web 3-5 is arranged between the first upper chord 3-1, the second upper chord 3-2 and the lower chord 3-3. This structural system has high rigidity, strong bearing capacity, small deformation, and can withstand vertical load requirements such as upper cables and daily maintenance; at the same time, the plane truss structure system composed of the upper chord (including the first upper chord 3-1 and the second upper chord 3-2) and the horizontal web 3-4 can not only withstand horizontal loads such as wind, waves, and earthquakes, but also can be directly used as a platform for horizontal cable laying and daily maintenance walkways, saving the amount of cable trays or trough boxes and reducing engineering costs.

[0031] Further, such as Figure 1 , 3 As shown in , 4, the inverted triangle arch truss 3 is divided into a first horizontal section, an arch section and a second horizontal section between the front photovoltaic array support rear pile 1-2 and the rear photovoltaic array support front pile 2-1; the length of the first horizontal section is the distance S1 between the arch truss arch point and the front array support rear pile, the horizontal width of the arch section is the arch truss arch width S2, and the length of the second horizontal section is the distance S3 between the arch truss arch point and the rear array support front pile; the specific values ​​of S1, S2 and S3 are set according to the actual situation on site. The upper chords on both sides of the north-south inverted triangular arch truss 3 are directly on the upper part of the supporting triangular support structure, that is: when the first horizontal section is connected to the rear pile 1-2 of the front photovoltaic array support, the first upper chord 3-1 and the second upper chord 3-2 are fixedly installed on the upper end of the horizontal beam 6 set on the rear pile 1-2 of the front photovoltaic array support through angle steel connectors 9 and bolts 10; when the second horizontal section is connected to the front pile 2-1 of the rear photovoltaic array support, the first upper chord 3-1 and the second upper chord 3-2 are fixedly installed on the upper end of the horizontal beam 6 set on the front pile 2-1 of the rear photovoltaic array support through angle steel connectors 9 and bolts 10. The offshore welding process is avoided.

[0032] Further, such as Figure 2-3 As shown, the width between the first upper chord 3-1 and the second upper chord 3-2 is the truss upper chord spacing B, and the truss upper chord spacing B is divided into the first cable laying area width b1, the maintenance walkway area width b2 and the second cable laying area width b3; the specific data of B, b1, b2 and b3 are set according to the actual situation on site.

[0033] Furthermore, the structure of the inverted triangle arch truss 3 is processed in sections in the factory by intersecting welding, and then spliced ​​on site after being transported to the dock. The inverted triangle arch truss structure is processed in sections in the factory, and the truss is assembled at the dock, and then transported to the construction site by ship. The truss structure is hoisted as a whole, and the upper chords at both ends are directly supported on the triangular support beams set on the side of the photovoltaic array pile foundation; it not only ensures the processing quality and anti-corrosion effect in the factory, but also facilitates long-distance transportation. This support system can meet the load-bearing requirements of direct cable laying and the clearance requirements of bottom ship navigation, and can realize the safe and reliable construction and operation of offshore photovoltaic power stations, while saving pile foundations and reducing project costs.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An offshore photovoltaic large-span inverted triangle arch truss cable support structure system, characterized by: The invention comprises a triangular support structure arranged on the side of each steel pipe pile of a photovoltaic support platform and an inverted triangular arch truss (3) arranged on the triangular support structure; the inverted triangular arch truss (3) is arched between a front photovoltaic array (1) and a rear photovoltaic array (2); after the inverted triangular arch truss (3) is arched, the upper chord of the inverted triangular arch truss (3) is tangent to a line (4) connecting the front and rear arrays; the inverted triangular arch truss (3) passes through the lower ends of the front photovoltaic array (1) and the rear photovoltaic array (2) and is arranged horizontally; cables (5) are laid on both sides of the upper end of the inverted triangular arch truss (3), and an inspection walkway area is arranged between the cables (5) laid on both sides.

2. According to claim 1, an offshore photovoltaic large-span inverted triangle arch truss cable support structure system is characterized by: The triangular support structure comprises two horizontal beams (6) symmetrically arranged on both sides of the steel pipe pile and two bottom diagonal braces (7) for fixing the two horizontal beams (6); one end of the bottom diagonal brace (7) is connected to the front end of the horizontal beam (6), and the other end is connected to the lower part of the steel pipe pile.

3. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 2 is characterized by: Crossbeam supports (11) are symmetrically arranged on both sides of the steel pipe pile, and diagonal brace supports (12) are symmetrically arranged on both sides of the lower ends of the crossbeam supports (11); one end of the horizontal crossbeam (6) is connected to the crossbeam support (11) through an angle steel connector (9), and the other end of the bottom diagonal brace (7) is connected to the diagonal brace support (12); a horizontal connecting section is arranged at the connection between the bottom diagonal brace (7) and the diagonal brace support (12).

4. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 3 is characterized by: The horizontal cross beam (6), the angle steel connector (9) and the cross beam support (11) are all connected via bolts (10); the horizontal connection section of the diagonal brace support (12) and the bottom diagonal brace (7) are connected via bolts (10); and the horizontal cross beam (6) and the bottom diagonal brace (7) are connected via bolts (10).

5. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 3 is characterized by: A first horizontal support (8) is arranged crosswise between a horizontal beam (6) arranged on one side of the steel pipe pile and a horizontal beam (6) arranged on the other side of the steel pipe pile, and a second horizontal support (13) is arranged at the upper end where the horizontal beam (6) is connected to the bottom diagonal support (7).

6. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 5, characterized in that: The first horizontal support (8) and the horizontal beam (6) are connected via bolts (10), and the second horizontal support (13) and the horizontal beam (6) are connected via bolts (10).

7. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 1, characterized in that: The inverted triangular arch truss (3) comprises a first upper chord (3-1) and a second upper chord (3-2) which are arranged in parallel, a lower chord (3-3) being arranged in parallel at the lower ends of the first upper chord (3-1) and the second upper chord (3-2), a horizontal web member (3-4) being arranged between the first upper chord (3-1) and the second upper chord (3-2), and an inclined diagonal web member (3-5) being arranged between the first upper chord (3-1), the second upper chord (3-2) and the lower chord (3-3).

8. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 7, characterized in that: The inverted triangle arch truss (3) is divided into a first horizontal section, an arch section, and a second horizontal section between the front photovoltaic array support rear pile (1-2) and the rear photovoltaic array support front pile (2-1); the length of the first horizontal section is the distance S1 between the arch truss arch point and the front array support rear pile, the horizontal width of the arch section is the arch truss arch width S2, and the length of the second horizontal section is the distance S3 between the arch truss arch point and the rear array support front pile; when the first horizontal section is connected to the front photovoltaic array support rear pile (1-2), the first horizontal section is connected to the front photovoltaic array support rear pile (1-2). An upper chord rod (3-1) and a second upper chord rod (3-2) are fixedly mounted on the upper end of a horizontal beam (6) arranged on a rear pile (1-2) of a front photovoltaic array support via an angle steel connector (9) and bolts (10); when the second horizontal section is connected to a front pile (2-1) of a rear photovoltaic array support, the first upper chord rod (3-1) and the second upper chord rod (3-2) are fixedly mounted on the upper end of a horizontal beam (6) arranged on a front pile (2-1) of a rear photovoltaic array support via an angle steel connector (9) and bolts (10).

9. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 7, characterized in that: The width between the first upper chord (3-1) and the second upper chord (3-2) is the truss upper chord spacing B, and the truss upper chord spacing B is divided into a first cable laying area width b1, a maintenance walkway area width b2, and a second cable laying area width b3.

10. The offshore photovoltaic large-span inverted triangle arch truss cable support structure system according to claim 7, characterized in that: The structure of the inverted triangular arch truss (3) is processed in sections in a factory by intersecting welding, and is then transported to the dock for on-site splicing.

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