Three-layer six-stress main steel cable photovoltaic flexible support system suitable for offshore photovoltaic

Abstract

The utility model relates to the technical field of photovoltaic installation assemblies, in particular to a three-layer six-stress main steel cable photovoltaic flexible support system suitable for offshore photovoltaic. According to the three-layer six-stress-main-steel-cable photovoltaic flexible support system suitable for offshore photovoltaic, the upper-layer stress main steel cable I and the upper-layer stress main steel cable II, the lower-layer stress main steel cable I and the lower-layer stress main steel cable II, and the anti-arch stress main steel cable I and the anti-arch stress main steel cable II are all stress main steel cables; the upper-layer and lower-layer steel cables are arranged in a multi-span full-length manner; the anti-arch steel cables are arranged in a multi-span full-length mode, upward deflection of the flexible photovoltaic support system caused by wind suction force is effectively resisted, and a ground anchor for resisting upward wind suction force does not need to be additionally arranged. A plurality of quadrangle frame devices are adopted for transmitting vertical supporting force between the first upper-layer stress main steel cable and the second upper-layer stress main steel cable, between the first lower-layer stress main steel cable and the second lower-layer stress main steel cable and between the first anti-arch stress main steel cable and the second anti-arch stress main steel cable, each quadrangle frame device is of a single-layer structure, and stress is clear and easy to analyze.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic installation component technology, specifically a three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaics. Background Technology

[0002] With the global energy shortage becoming increasingly serious, solar energy, as a renewable green energy source, is playing an increasingly important role in my country's energy structure, and the development of photovoltaic power generation projects is accelerating. Due to the site limitations of traditional ground-mounted photovoltaic (PV) supports, a large-span flexible PV support structure composed of a prestressed cable system has been gaining increasing application in recent years. This new system uses prestressed steel cables to support the load of the PV modules, offering advantages such as adaptability to complex terrain conditions, full utilization of land area, and strong site adaptability.

[0003] For flexible photovoltaic (PV) support systems, the common structural forms are mainly single-layer double-cable and double-layer triple-cable. Single-layer double-cable flexible PV support systems are only suitable for projects with small spans, with an economical span of 10-25 meters. They have poor wind resistance and a narrow application range. Double-layer triple-cable flexible PV support systems are economical for spans of 20-40 meters. Currently, the industry practice is to use the lower cable as a wind-resistant structural cable, arranged separately across spans. These cables have a small diameter and do not participate in the main structural load, only serving a wind-resistant stabilizing function. This results in uneven stress distribution and poor stability, making them unsuitable for large-span PV installations. Both of these structural forms require specially installed ground anchors to resist upward wind suction under strong wind loads in offshore PV projects; otherwise, the upward deflection limit caused by wind suction cannot be met. The double-layer triple-cable system uses a spatial triangular pyramid between the upper and lower cables, resulting in a complex structure, unclear force transmission path, and high project cost. The current industry practice for constructing wind-resistant systems is to connect triangular cones with angle steel and round pipes, which is a rigid force transmission connection method. This is inconsistent with the flexible force-bearing concept of flexible support systems. Under strong wind conditions, this can cause torsional deformation and lead to engineering accidents, as has been verified in many engineering accidents involving flexible supports. Summary of the Invention

[0004] The purpose of this invention is to provide a three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaic applications.

[0005] A three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaic systems includes multiple sets of parallel photovoltaic flexible supports. Each photovoltaic flexible support includes two end span steel supports, multiple rows of intermediate span steel supports, and multiple photovoltaic modules. Between the two end span steel supports are upper-layer main steel cables one and two, lower-layer main steel cables one and two, and anti-arch main steel cables one and two. The photovoltaic modules are hingedly connected to the upper-layer main steel cables one and two. Anchor piles are installed on the outer side of each end span steel support. The two ends of each of the upper-layer main steel cables one and two, lower-layer main steel cables one and two, and anti-arch main steel cables one and two are respectively hingedly connected to two anchor piles. Multiple rows of intermediate span columns are set between the supports. The top of each row of multiple intermediate columns is fixedly set with an intermediate span steel support. The upper load-bearing main steel cable 1 and 2, the lower load-bearing main steel cable 1 and 2, and the anti-arch load-bearing main steel cable 1 and 2 are all arranged to pass through the intermediate span steel support along its length. The end span steel support and the intermediate span steel support, as well as the two adjacent intermediate span steel supports, form a support span. The upper load-bearing main steel cable 1 and 2, the lower load-bearing main steel cable 1 and 2, and the anti-arch load-bearing main steel cable 1 and 2 within the same support span are fixedly connected by multiple evenly arranged four-corner frame devices. The multiple four-corner frame devices arranged in parallel on multiple sets of load-bearing main steel cables are connected by wind-resistant devices.

[0006] Furthermore, the four-corner frame device includes a connecting seat. The top of the connecting seat is symmetrically provided with a connecting plate and an outer frame. The connecting plate is connected to one end of the inner frame by bolts. The other ends of the two outer frames and the two inner frames are respectively connected to the two ends of the cross frame by bolts. The intersection of the two inner frames is connected by bolts. The bottom of the connecting seat is provided with U-shaped clips 1 and 2, which are fixedly connected to the lower main load-bearing steel cable 1 and the lower main load-bearing steel cable 2. The top of both ends of the cross frame is provided with U-shaped clips 3, which are fixedly connected to the upper main load-bearing steel cable 1 and the upper main load-bearing steel cable 2. The middle of the side of the two outer frames is provided with U-shaped clips 4, which are fixedly connected to the anti-arch main load-bearing steel cable 1 and the anti-arch main load-bearing steel cable 2. The two ends of the side of the two outer frames are provided with U-shaped clips 5, which are fixedly connected to the wind-resistant connecting cable.

[0007] Furthermore, the wind-resistant device includes two wind-resistant piles, which are respectively set on the ground outside the outermost four-corner frame device. The wind-resistant piles are fixedly connected to the upper U-shaped clips of the two outer frames of the outermost four-corner frame device through wind-resistant cable one. A wind-resistant main cable is set between the two wind-resistant piles. The wind-resistant main cable is set through and fixedly connected to the U-shaped clips on the multiple parallel four-corner frame devices. The outer frames of the two parallel four-corner frame devices that are close to each other are connected by two wind-resistant connecting cables through U-shaped clips five. The two wind-resistant connecting cables are arranged crosswise.

[0008] In summary, this utility model has the following beneficial effects:

[0009] This utility model discloses a three-layer, six-channel flexible photovoltaic support system suitable for offshore photovoltaic systems. The upper and lower main steel cables (upper and lower layers, lower and lower layers, and anti-arch main steel cables) are all main steel cables. Both upper and lower layers are arranged in a multi-span continuous configuration, resulting in more uniform stress distribution and improved wind resistance. This reduces mid-span deflection and lowers the total tension at the anchoring ends of the end spans, allowing for larger design spans while saving on construction costs. The multi-span continuous arrangement of the anti-arch steel cables effectively resists the upward deflection of the flexible photovoltaic support system caused by wind suction, eliminating the need for specially installed ground anchors to resist upward wind suction under strong wind loads in offshore photovoltaic systems. The vertical support force is transmitted through multiple four-corner frame devices between the upper and lower main steel cables, and between the anti-arch main steel cables. These four-corner frame devices are single-layer structures, with clear and easily analyzable force transmission paths. Compared to the current industry practice of using spatial triangular pyramids, this method is simpler to install and saves on project costs. The four corner frames are connected by two small-diameter, intersecting wind-resistant connecting cables. This wind-resistant device achieves a truly flexible connection, making the overall photovoltaic support system both rigid and flexible, realizing the flexible force-bearing concept of a flexible photovoltaic support system, and better adapting to the overall deformation coordination performance of the flexible photovoltaic support system under strong wind conditions. This utility model effectively solves the problem of large-span photovoltaic support system installation at sea. Compared to the utility model patent "A Double-Layer Four-Stage Main Steel Cable Photovoltaic Flexible Support System" with application number "2024231501439", this system adds anti-arching steel cables to resist wind suction, eliminating the need for specially set ground anchors to resist upward wind suction, thus saving a large number of ground anchor piles in the application of offshore photovoltaic projects. Attached Figure Description

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0011] Figure 1This is a top view of a three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaic applications according to this utility model;

[0012] Figure 2 for Figure 1 A cross-sectional view of the structure with photovoltaic modules removed along the AA direction;

[0013] Figure 3 for Figure 1 A side sectional view of the structure with the end span steel support and intermediate steel support removed in the BB direction;

[0014] Figure 4 This is a schematic diagram of the four-corner bracket device of this utility model;

[0015] Figure 5 This is a structural schematic diagram of the intermediate column and the intermediate span steel support of this utility model;

[0016] Figure 6 This is a three-dimensional structural diagram of the photovoltaic module removal method of this utility model.

[0017] In the diagram: 1. End span steel support; 21. Upper layer main steel cable 1; 22. Upper layer main steel cable 2; 31. Lower layer main steel cable 1; 32. Lower layer main steel cable 2; 41. Reverse arch main steel cable 1; 42. Reverse arch main steel cable 2; 5. Four-corner frame device; 51. Connecting seat; 52. Connecting plate; 53-1. External frame; 53-2. Internal frame; 54. Horizontal frame; 55. U-shaped clip 1; 56. U-shaped clip 2; 57. U-shaped clip 3; 58. U-shaped clip 4; 59. U-shaped clip 5; 6. Photovoltaic module; 7. Wind-resistant device; 71. Wind-resistant pile; 72. Wind-resistant main cable; 73. Wind-resistant cable 1; 74. Wind-resistant connecting cable; 8. Anchor pile; 9. Intermediate column; 10. Intermediate span steel support; 11. Support span. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described as follows:

[0020] A three-layer, six-channel main cable photovoltaic flexible support system suitable for offshore photovoltaics includes multiple sets of parallel photovoltaic flexible supports. Each photovoltaic flexible support includes two end span steel supports 1, multiple rows of intermediate span steel supports 10, and multiple photovoltaic modules 6. Between the two end span steel supports 1 are arranged upper main cable 1 21 and upper main cable 22, lower main cable 1 31 and lower main cable 2 32, and anti-arch main cable 1 41 and... The photovoltaic module 6 is hingedly connected to the upper main steel cable 21 and the upper main steel cable 22. Anchor piles 8 are set on the outside of the end span steel support 1. The two ends of the upper main steel cable 21 and the upper main steel cable 22, the lower main steel cable 31 and the lower main steel cable 22, and the anti-arch main steel cable 41 and the anti-arch main steel cable 22 are respectively hinged to the anchor piles 8. Between the two end span steel supports 1 Multiple rows of intermediate columns 9 are provided, and a central span steel support 10 is fixedly installed at the top of each row of multiple intermediate columns 9. The upper load-bearing main steel cables 1 21 and 22, the lower load-bearing main steel cables 1 31 and 32, and the anti-arch load-bearing main steel cables 1 41 and 42 all pass through the central span steel support 10 and are arranged along its entire length. The end span steel support 1 and the central span steel support 10, as well as the steel supports of two adjacent central spans, are connected. Each of the supports 10 forms a support span 11. The upper load-bearing main steel cable 1 21 and upper load-bearing main steel cable 22, the lower load-bearing main steel cable 1 31 and lower load-bearing main steel cable 2 32, and the anti-arch load-bearing main steel cable 1 41 and anti-arch load-bearing main steel cable 2 42 within the same support span 11 are fixedly connected by multiple evenly arranged corner frame devices 5. The multiple corner frame devices 5 arranged in parallel on multiple sets of load-bearing main steel cables are connected by wind-resistant devices 7.

[0021] In this embodiment, the end span steel support 1, anchor pile 8, and intermediate column 9 are all fixedly connected to the ground. A support span 11 is formed between the end span steel support 1 and the intermediate span steel support 10, and between two adjacent intermediate span steel supports 10. Multiple support spans 11 can be set between two end span steel supports 1 through the above arrangement. In this embodiment, preferably, n rows of intermediate span steel supports 10 are set between two end span steel supports 1. The upper load-bearing main steel cable 1 21 and the upper load-bearing main steel cable 22, the lower load-bearing main steel cable 1 31 and the lower load-bearing main steel cable 2 32, and the anti-arch load-bearing main steel cable 1 41 and the anti-arch load-bearing main steel cable 2 42 within the same support span 11 are fixedly connected by four evenly arranged corner bracket devices 5.

[0022] The upper main load-bearing cables 21 and 22, the lower main load-bearing cables 31 and 32, and the anti-arch main load-bearing cables 41 and 42 between the two end span steel supports 1 are connected by multiple four-corner frame devices 5. Both the upper and lower cables are arranged continuously across multiple spans and are all main load-bearing cables, resulting in more uniform stress distribution and greater wind resistance in the overall structure. This reduces mid-span deflection and lowers the total tension at the anchorage end of the end span steel supports 1, allowing for a design span of 30-70 meters while saving on construction costs. The anti-arch cables, arranged continuously across multiple spans, effectively resist the upward deflection of the flexible photovoltaic support system caused by wind suction, eliminating the need for specially installed ground anchors to resist upward wind suction. In offshore photovoltaic projects, the wind load conditions caused by typhoons are complex, and the upward deflection limit of the flexible photovoltaic support system caused by wind suction is difficult to meet the specifications. It is necessary to set up ground anchor piles to resist wind suction. The technology of this utility model can save a lot of ground anchor piles to resist upward wind suction.

[0023] The upper main load-bearing steel cables 21 and 22, the lower main load-bearing steel cables 31 and 32, and the anti-arch main load-bearing steel cables 41 and 42 are connected by multiple corner bracket devices 5 to transmit vertical support forces. These corner bracket devices 5 are single-layer structures, and the force transmission path is clear and easy to analyze. Compared to the current industry practice of using spatial triangular pyramids, this method is simpler to install and saves on project costs.

[0024] The photovoltaic module 6 is a further application of existing technology in this utility model, typically including a solar panel and an aluminum alloy frame, etc., and the specific structure will not be described in detail. Preferably, the photovoltaic module 6 is connected to the upper main load-bearing steel cable 21 and the upper main load-bearing steel cable 22 through the utility model patent application number "2024217079804" entitled "A Component Installation Block for Photovoltaic Flexible Support and Photovoltaic Fence". Each photovoltaic module 6 is completely separated and bears force independently, without interfering with each other. This can adapt to deformation coordination under the maximum displacement of the structure and avoid the interlocking damage effect during strong wind damage.

[0025] Multiple quadrangular frame devices 5 arranged in parallel on multiple sets of main load-bearing steel cables are connected by a wind-resistant device 7. The wind-resistant device 7 includes two wind-resistant piles 71, which are respectively set on the ground outside the outermost quadrangular frame device 5. The wind-resistant piles 71 are fixedly connected to the upper U-shaped clips 59 of the outermost outer frame 53-1 of the outermost quadrangular frame device 5 through wind-resistant cable 1 73. A wind-resistant main cable 72 is set between the two wind-resistant piles 71. The wind-resistant main cable 72 passes through the U-shaped clips 2 56 on the multiple quadrangular frame devices 5 arranged in parallel and is fixedly connected to them. The outer frames 53-1 of the two quadrangular frame devices 5 arranged in parallel and close to each other are connected by two wind-resistant connecting cables 74 through U-shaped clips 59. The two wind-resistant connecting cables 74 are arranged crosswise.

[0026] In this embodiment, multiple quadrangular support devices 5 arranged in parallel on multiple sets of main load-bearing steel cables are connected by two small-diameter, intersecting wind-resistant connecting cables 74. The outermost supports 53-1 of the two outermost quadrangular support devices 5 on the multiple sets of main load-bearing steel cables are connected to wind-resistant piles 71 via wind-resistant cable 73, which pulls these two quadrangular support devices 5 outwards. The U-shaped clips 56 of the multiple quadrangular support devices 5 arranged in parallel on the multiple sets of main load-bearing steel cables are connected by the same wind-resistant main cable 72. Both ends of the wind-resistant main cable 72 are connected to two wind-resistant piles 71, pulling the multiple quadrangular support devices 5 outwards. Through the above arrangement, the support system is connected into a spatial mesh-like overall structure, truly achieving flexible connection and combining rigidity and flexibility in the overall photovoltaic support system. This realizes the flexible force-bearing concept of the photovoltaic flexible support system and can better adapt to the overall deformation coordination performance of the photovoltaic flexible support system under strong wind conditions.

[0027] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0028] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

Claims

1. A three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaic systems, characterized in that, The system includes multiple sets of parallel photovoltaic flexible supports, each comprising two end span steel supports (1), multiple rows of intermediate span steel supports (10), and multiple photovoltaic modules (6). Between the two end span steel supports (1) are arranged upper-layer main load-bearing cables 1 (21) and 2 (22), lower-layer main load-bearing cables 1 (31) and 2 (32), and anti-arch main load-bearing cables 1 (41) and 2 (42). The photovoltaic modules (6) are connected to the upper-layer main load-bearing cables... The first steel cable (21) and the second upper-layer main steel cable (22) are hinged together. Anchor piles (8) are provided on the outside of the end span steel support (1). The two ends of the first upper-layer main steel cable (21) and the second upper-layer main steel cable (22), the first lower-layer main steel cable (31) and the second lower-layer main steel cable (32), the first anti-arch main steel cable (41) and the second anti-arch main steel cable (42) are respectively hinged to the anchor piles (8). Multiple rows of intermediate span columns (9) are provided between the two end span steel supports (1). A central span steel support (10) is fixedly installed at the top of multiple central columns (9) in each row. The upper main steel cable 1 (21) and upper main steel cable 2 (22), the lower main steel cable 1 (31) and lower main steel cable 2 (32), the anti-arch main steel cable 1 (41) and anti-arch main steel cable 2 (42) all pass through the central span steel support (10) and are arranged along its entire length. The end span steel support (1) and the central span steel support (10) are located between each other, and between two adjacent central span steel supports (10). Each of the main steel cables forms a support span (11). The upper main steel cable 1 (21) and the upper main steel cable 2 (22), the lower main steel cable 1 (31) and the lower main steel cable 2 (32), the anti-arch main steel cable 1 (41) and the anti-arch main steel cable 2 (42) within the same support span (11) are fixedly connected by multiple evenly arranged corner frame devices (5). The multiple corner frame devices (5) arranged in parallel on the multiple sets of main steel cables are connected by wind-resistant devices (7).

2. The three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaic applications as described in claim 1, characterized in that, The four-corner frame device (5) includes a connecting seat (51). A connecting plate (52) and an outer frame (53-1) are symmetrically arranged on the top of the connecting seat (51). The connecting plate (52) is bolted to one end of the inner frame (53-2). The other ends of the two outer frames (53-1) and the two inner frames (53-2) are bolted to both ends of the crossbeam (54). The intersection of the two inner frames (53-2) is bolted together. The bottom of the connecting seat (51) is provided with a connection to the lower main load-bearing cable one (31) and the lower main load-bearing cable two (31). 32) Fixed connection of U-shaped clip one (55) and U-shaped clip two (56), the top of both ends of the cross frame (54) is respectively provided with U-shaped clip three (57) fixedly connected to the upper main steel cable one (21) and the upper main steel cable two (22), the middle of the side of the two outer frames (53-1) is provided with U-shaped clip four (58) fixedly connected to the anti-arch main steel cable one (41) and the anti-arch main steel cable two (42), and the two sides of the two outer frames (53-1) are respectively provided with U-shaped clip five (59) fixedly connected to the wind-resistant connecting cable (74).

3. A three-layer, six-channel main steel cable photovoltaic flexible support system suitable for offshore photovoltaic applications as described in claim 1, characterized in that, The wind-resistant device (7) includes two wind-resistant piles (71). The two wind-resistant piles (71) are respectively set on the ground outside the outermost four-corner frame device (5). The wind-resistant piles (71) are fixedly connected to the upper U-shaped five (59) of the two outer uprights (53-1) of the outermost four-corner frame device (5) through wind-resistant cable one (73). A wind-resistant main cable (72) is set between the two wind-resistant piles (71). The wind-resistant main cable (72) passes through the U-shaped two (56) on the multiple four-corner frame devices (5) arranged in parallel and is fixedly connected to them. The outer uprights (53-1) of the two four-corner frame devices (5) arranged in parallel are connected by two wind-resistant connecting cables (74) through U-shaped five (59). The two wind-resistant connecting cables (74) are arranged crosswise.

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