Large-span photovoltaic net rack support

Abstract

The utility model belongs to the technical field of large-span support, disclose a kind of large-span photovoltaic net rack support, including pile foundation component, multiple rod units and multiple ball nodes;Pile foundation component is arranged in sea in preset arrangement mode, for supporting net rack support;Multiple rod units are assembled into multiple three-dimensional net rack units;Multiple ball nodes are arranged between adjacent rod units, for connecting rod unit;Multiple three-dimensional net rack units are arranged according to preset arrangement and constitute net rack support, and support net rack is fixedly arranged on pile foundation component.The utility model's net rack support is applicable to the demand of large-span offshore photovoltaic support, with excellent rigidity and bending capacity.Ensure the stability and security of photovoltaic support under complex marine environment, provide solid guarantee for long-term operation of offshore photovoltaic field area.The steel consumption of the utility model's net rack support in unit area is reduced compared with truss structure, reduce material cost, improve the overall economic benefit of project.

Description

Technical Field

[0001] This utility model discloses a large-span photovoltaic grid support structure, belonging to the technical field of large-span support structures. Background Technology

[0002] With the transformation of the global energy structure and the rapid development of renewable energy, offshore photovoltaic (PV) power generation, as an emerging clean energy power generation method, is gradually gaining attention and being promoted by various countries. In the construction of offshore PV power plants, the support structure, as a key component supporting the PV modules and ensuring the stable operation of the power plant, directly affects the stability and economic efficiency of the PV power plant through its selection and design. Currently, the main types of support structures used in offshore PV are conventional fixed support schemes and large-span support schemes.

[0003] Conventional fixed support systems borrow design elements from terrestrial photovoltaic (PV) systems, featuring relatively small support structures and typically using PHC piles as foundations to provide the necessary horizontal bearing capacity and bending resistance. While technically mature, this approach is limited by the bearing capacity of the piles, restricting its application and the density of PV module placement. In contrast, large-span support systems offer larger dimensions and greater load-bearing capacity, allowing for the placement of more PV modules and thus improving the power generation efficiency and economic benefits of PV power plants. Furthermore, large-span support systems reduce the number of piles required, lowering construction costs and reducing environmental impact.

[0004] In traditional truss-type large-span support structures, greater bending stiffness is achieved by incorporating several truss beams in the upper and lower chords, and the structural layout is flexible, facilitating adjustment and optimization. Therefore, truss structures are widely used in offshore photovoltaic power plants, especially in applications requiring large spatial spans or heavy loads. However, truss structures also have certain limitations. Due to the constraints of their structural form, the stiffness and span that truss structures can provide are limited, making it difficult to meet the requirements of large-scale offshore photovoltaic support structures. Furthermore, truss structures consume a large amount of steel per unit area, increasing construction costs and environmental burden. Summary of the Invention

[0005] This utility model overcomes the shortcomings of the prior art and proposes a large-span photovoltaic grid support, including: pile foundation components, multiple pole units and multiple ball nodes;

[0006] The pile foundation components are arranged in a preset manner at sea to support the grid frame support.

[0007] The multiple rod units are assembled into multiple three-dimensional space frame units;

[0008] The plurality of ball nodes are arranged between adjacent rod units for connecting the rod units;

[0009] The multiple three-dimensional space frame units are arranged in a preset manner to form a space frame support, and the support space frame is fixedly installed on the pile foundation component.

[0010] Preferably, the ball joint and the rod unit are connected by welding.

[0011] Preferably, the ball joint is connected to the rod unit by bolts.

[0012] Preferably, each of the rod units includes two bolts;

[0013] The nuts of the two bolts are respectively fixed at both ends of the rod unit;

[0014] The ball node is provided with multiple threaded holes;

[0015] The two bolts have threads on their shanks that match the threaded holes.

[0016] Preferably, the rod unit further includes two cones and two sleeves;

[0017] The end of each cone away from the sealing plate is fixed to the end of the rod unit, the screw passes through the cone, and the nut is encapsulated inside the cone;

[0018] The sleeve is fitted onto the screw and pinned to the screw.

[0019] Preferably, the three-dimensional space frame unit is a triangular pyramid, triangular prism, cube, or square pyramid spatial structure.

[0020] Preferably, when the three-dimensional space frame unit is a quadrangular pyramidal spatial structure;

[0021] The quadrangular pyramidal spatial structure includes four triangular faces and a quadrilateral base;

[0022] The triangular face and the quadrilateral base are connected by the rod unit and the ball node.

[0023] Preferably, the pile foundation assembly includes multiple pile foundations;

[0024] Multiple pile foundations are set up at sea in a pre-arranged manner.

[0025] Preferably, the pile foundation is fixedly connected to the ball joint on the space frame support.

[0026] Preferably, the non-load-bearing rod units in the quadrangular pyramidal spatial structure are evacuated.

[0027] Compared with existing technologies, the beneficial effects of this utility model are as follows: The space frame support of this utility model is suitable for the needs of large-span offshore photovoltaic support systems, possessing excellent rigidity and bending load-bearing capacity. It ensures the stability and safety of the photovoltaic support system in complex marine environments, providing a solid guarantee for the long-term operation of offshore photovoltaic fields. The space frame support of this utility model uses less steel per unit area compared to truss structures, reducing material costs and improving the overall economic benefits of the project. Simultaneously, the hollowed-out space frame support further optimizes steel usage by reducing the number of non-critical members, significantly reducing the steel consumption of the space frame structure and further improving economic efficiency.

[0028] Furthermore, bolted ball joints can be installed simply by turning the bolts, and are easy to coat with an anti-corrosion coating. This not only significantly improves construction efficiency but also reduces the technical requirements for inspection equipment and workers. The bolted ball joint design also facilitates on-site inspection and acceptance, reducing construction complexity and potential quality risks. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the large-span photovoltaic grid support in this embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the bolt connection between the rod unit and the ball node in an embodiment of this utility model;

[0031] Figure 3 This is a schematic diagram of the overall structure of the large-span photovoltaic grid support after evacuation treatment in an embodiment of this utility model.

[0032] In the diagram: 1. Pile foundation; 2. Space frame support; 3. Ball joint; 4. Rod element; 5. Bolt. Detailed Implementation

[0033] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and 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.

[0034] Please see Figure 1As shown, the purpose of this embodiment is to provide a large-span photovoltaic grid support 2, including: pile foundation components, multiple pole units 4 and multiple ball nodes 3; the pile foundation components are set at sea in a preset arrangement to support the grid support 2; multiple pole units 4 are assembled into multiple three-dimensional grid units; multiple ball nodes 3 are set between adjacent pole units 4 to connect the pole units 4; multiple three-dimensional grid units are arranged in a preset manner to form the grid support 2, and the grid support is fixedly set on the pile foundation components.

[0035] Specifically, the large-span photovoltaic grid support 2 in this embodiment mainly consists of pile foundation components, multiple pole units 4, and multiple ball nodes 3. The pile foundation components, serving as the supporting foundation for the entire support, are firmly installed at sea in a predetermined arrangement to ensure the stability and load-bearing capacity of the support. These pile foundation components typically extend deep into the seabed to provide sufficient support. In this embodiment, the grid support 2 is viewed from above as a rectangular structure with side lengths ranging from 40 to 70 meters.

[0036] Furthermore, the three-dimensional space frame unit is a triangular pyramid, triangular prism, cube, or square pyramid spatial structure.

[0037] Furthermore, when the three-dimensional space frame unit is a quadrangular pyramidal spatial structure; the quadrangular pyramidal spatial structure includes four triangular faces and a quadrilateral base; the triangular faces and the quadrilateral base are connected by rod units 4 and ball nodes 3.

[0038] Specifically, the three-dimensional space frame unit of this utility model includes various types, such as triangular pyramids, triangular prisms, cubes, or square pyramids, etc. This embodiment specifically uses a square pyramidal spatial structure three-dimensional space frame unit as an example. In the square pyramidal spatial structure, four triangular faces are respectively connected to the four sides of the quadrilateral base, forming four oblique support surfaces. The rod unit 4, as the main component connecting the triangular faces and the quadrilateral base, has its length and specifications precisely calculated according to the size and shape requirements of the space frame structure. The ball nodes 3, as key components connecting the rod units 4, have their number and position rationally arranged according to the needs of the space frame structure.

[0039] Furthermore, the pile foundation component includes multiple pile foundations 1; the multiple pile foundations 1 are arranged in a preset manner at sea.

[0040] The pile foundation assembly serves as the supporting foundation for the support frame. In this embodiment, the pile foundation 1 specifically includes four piles, which are securely installed at sea in a 2×2 array arrangement.

[0041] Furthermore, the ball node 3 and the rod unit 4 are connected by welding.

[0042] Specifically, in one embodiment, a quadrangular pyramid is selected as the basic shape of the space frame unit based on the size and shape requirements of the space frame structure. The quadrangular pyramid structure consists of four triangular faces and a quadrilateral base, which are welded together by rod units 4 and ball joints 3. After determining the shape of the space frame unit, the length of the corresponding rod unit 4 is calculated according to the size of the space frame, and a suitable-sized welded ball is selected as the connecting ball joint 3. At the construction site, the space frame structure is first assembled piece by piece at the dock site. During the assembly process, the rod units 4 are connected by welded ball joints 3. The welding operation is carried out by professional technicians to ensure welding quality and connection strength. The assembled space frame unit has a stable structure and good load-bearing capacity. After assembly, the space frame unit is hoisted and transported to the offshore photovoltaic field using a shore crane vessel. At sea, the space frame unit is hoisted onto the top of the pre-driven pile foundation 1 and fixedly connected to the top of the pile foundation 1 by welded ball joints 3. During the connection process, ensure that the connection between ball node 3 and pile foundation 1 is firm and reliable to meet the stability and load-bearing requirements of the space frame structure.

[0043] Furthermore, the ball node 3 is connected to the rod element 4 by bolts 5.

[0044] Since welding connections require secondary damage testing and ultrasonic testing of weld points on-site, the operation is complex and places high demands on testing equipment and workers. Therefore, in a further embodiment, bolts 5 are used to connect ball nodes 3 and rod units 4, i.e., bolt ball nodes, thereby realizing the assembly and connection of the space frame support 2.

[0045] Furthermore, each rod unit 4 includes two bolts 5; the nuts of the two bolts 5 are respectively fixed at both ends of the rod unit 4; the ball joint 3 is provided with multiple threaded holes; the bolts of the two bolts 5 are provided with threads that match the threaded holes.

[0046] Furthermore, the rod unit 4 also includes two cones and two sleeves; the end of each cone away from the sealing plate is fixed to the end of the rod unit 4, the screw passes through the cone, and the nut is encapsulated inside the cone; the sleeve is sleeved on the screw and pinned to the screw.

[0047] Specifically, such as Figure 2As shown, this embodiment takes the bolt 5 connection as an example. The specific assembly method of bolt 5 between rod unit 4 and cone head is as follows: bolt 5 passes through the center of the cone head's sealing plate, causing the screw part to extend outside the cone head, while the nut is closed and fixed inside the cone head. The end of the cone head away from the sealing plate is firmly connected to both ends of rod unit 4 by welding or integral molding. This ensures the stability of bolt 5 and the firm connection between rod unit 4 and cone head. The connection mechanism between bolt 5 and sleeve is as follows: two circumferentially symmetrical pins are set on the screw, which serve as positioning and guiding functions. At the same time, a groove that perfectly matches the pins is set on the sleeve. When the sleeve is fitted onto the screw, the pin will slide along the groove until it reaches the predetermined position, thereby achieving a precise match between the pin and the groove in position. After the matching of the pin and the groove is completed, the connection between bolt 5 and ball joint 3 begins. At this point, simply turning the sleeve gently will cause the threads on the screw to match and tighten with the pre-set threaded hole on the ball joint 3. As the threads gradually tighten, the connection between the rod unit 4 and the ball joint 3 becomes increasingly secure, thus achieving the connection between the ball joint 3 and the rod unit 4. This connection method is not only simple and quick to operate, but also has high connection strength and good stability, providing solid and reliable support for large-span offshore photovoltaic supports.

[0048] Furthermore, the pile foundation 1 is fixedly connected to the ball joint 3 on the space frame support 2.

[0049] In this embodiment, the pile foundation 1 serves as the support point for the entire space frame structure, and its stability and load-bearing capacity are crucial. Therefore, the connection point between the pile foundation 1 and the space frame support 2 is the ball joint 3 of the space frame support 2.

[0050] Furthermore, the non-load-bearing rod unit 4 in the quadrangular pyramidal spatial structure is evacuated.

[0051] Specifically, such as Figure 3 As shown, in a further embodiment, to optimize the layout of the rod unit 4, improve structural efficiency, and reduce the steel consumption of the space frame support 2, thereby achieving both improved structural efficiency and reduced costs, non-critical members in the space frame were emptied. The location and number of emptied members were precisely calculated based on the overall design and strength requirements of the space frame structure to ensure that the space frame structure still meets design requirements after emptying.

[0052] Specifically, the hollowing-out process is based on a thorough understanding of the overall design and strength requirements of the space frame structure. First, advanced structural analysis software is used to comprehensively assess the stress state of the space frame structure, identifying non-critical members that contribute little to overall stability. These members are considered optimizable while maintaining the basic shape and stress path of the space frame. Next, based on the results of the structural analysis, the location and number of hollowed-out members are precisely calculated. This step is crucial because it directly relates to the stability and safety of the space frame structure after hollowing out. Through meticulous mechanical analysis and verification, it is ensured that the space frame structure still meets design requirements after hollowing out, including load-bearing capacity, deformation limits, and stability. It is important to note that the hollowing-out process is not an arbitrary reduction of members, but rather based on scientific calculations and verification. The selection of non-critical members is a standard practice for those skilled in the art, chosen according to specific project requirements; the selection principles and methods are common knowledge in the field and will not be elaborated upon here.

[0053] The space frame support 2 of this invention is suitable for the needs of large-span offshore photovoltaic (PV) supports, possessing excellent rigidity and bending load-bearing capacity. It ensures the stability and safety of the PV support in complex marine environments, providing a solid guarantee for the long-term operation of offshore PV sites. Compared to truss structures, the space frame support 2 of this invention uses less steel per unit area, reducing material costs and improving the overall economic benefits of the project. Simultaneously, the hollowed-out space frame support 2 further optimizes steel usage by reducing the number of non-critical members, significantly reducing the steel consumption of the space frame structure and further improving economic efficiency.

[0054] Furthermore, bolted ball joints can be installed with just a simple five-turn operation of the bolts, and are easy to coat with an anti-corrosion coating. This not only significantly improves construction efficiency but also reduces the technical requirements for inspection equipment and workers. The bolted ball joint design also facilitates on-site inspection and acceptance, reducing construction complexity and potential quality risks.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A large-span photovoltaic grid support structure, characterized in that, include: Pile foundation components, multiple rod elements, and multiple ball joints; The pile foundation components are arranged in a preset manner at sea to support the grid frame support. The multiple rod units are assembled into multiple three-dimensional space frame units; The plurality of ball nodes are arranged between adjacent rod units for connecting the rod units; The multiple three-dimensional space frame units are arranged in a preset manner to form a space frame support, and the space frame support is fixedly installed on the pile foundation component; The three-dimensional space frame unit is a triangular pyramid, triangular prism, cube, or square pyramid spatial structure.

2. The large-span photovoltaic grid support structure according to claim 1, characterized in that, The ball joint and the rod unit are connected by welding.

3. The large-span photovoltaic grid support structure according to claim 1, characterized in that, The ball joint is connected to the rod unit by bolts.

4. The large-span photovoltaic grid support according to claim 3, characterized in that, Each of the rod units includes two bolts; The nuts of the two bolts are respectively fixed at both ends of the rod unit; The ball node is provided with multiple threaded holes; The two bolts have threads on their shanks that match the threaded holes.

5. The large-span photovoltaic grid support according to claim 4, characterized in that, The rod unit also includes two cones and two sleeves; The end of each cone away from the sealing plate is fixed to the end of the rod unit, the screw passes through the cone, and the nut is encapsulated inside the cone; The sleeve is fitted onto the screw and pinned to the screw.

6. The large-span photovoltaic grid support structure according to claim 1, characterized in that, When the three-dimensional space frame unit is a quadrangular pyramidal spatial structure; The quadrangular pyramidal spatial structure includes four triangular faces and a quadrilateral base; The triangular face and the quadrilateral base are connected by the rod unit and the ball node.

7. The large-span photovoltaic grid support structure according to claim 1, characterized in that, The pile foundation assembly includes multiple pile foundations; Multiple pile foundations are set up at sea in a pre-arranged manner.

8. The large-span photovoltaic grid support according to claim 7, characterized in that, The pile foundation is fixedly connected to the ball joint on the space frame support.

9. The large-span photovoltaic grid support according to claim 6, characterized in that, The non-load-bearing rod units in the quadrangular pyramidal spatial structure are evacuated.

Images