Rigid connection module suitable for offshore floating type photovoltaic platforms and offshore floating type photovoltaic power station

Abstract

The invention discloses a rigid connection module suitable for offshore floating type photovoltaic platforms and an offshore floating type photovoltaic power station. The rigid connection module comprises a rigid connection node, a composite limiting bolt and an anti-falling structure, a composite limiting bolt is arranged on the rigid connecting node; and the composite limiting bolt is connected with the connecting steel plate through an anti-falling structure. According to the rigid connection module suitable for the offshore floating type photovoltaic platforms and the offshore floating type photovoltaic power station, the design is scientific, the rigid connection module is a novel rigid connection node structure taking structural reliability and environmental adaptability into consideration, and by means of the structure, the overall rigidity and the bearing efficiency can be guaranteed, and meanwhile the rigidity and the bearing capacity of the offshore floating type photovoltaic power station are improved. And the mechanism for improving stress distribution, buffering energy consumption and preventing loosening and falling off is provided, so that a solid guarantee is provided for safe and efficient operation of the large offshore floating type photovoltaic platform, and great practical significance is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore new energy utilization and marine engineering structure, in particular to a rigid connection module suitable for offshore floating photovoltaic platforms and an offshore floating photovoltaic power station. BACKGROUND

[0002] In response to the global energy transformation challenge, the development and utilization of clean and renewable energy such as solar energy has become a strategic focus. Among them, offshore floating photovoltaic technology has shown broad development prospects due to its advantages such as not occupying land resources and potential improvement of power generation efficiency, and is gradually becoming an important industrial direction after land-based photovoltaics.

[0003] Compared with land systems, offshore photovoltaic platforms need to withstand complex and variable marine environmental loads for a long time, and the structural reliability, especially the connection performance between modular floating units, is the core key to ensuring the long-term stable operation of the system.

[0004] Currently, the main way to constitute a large offshore floating photovoltaic power station is to assemble and connect multiple modular sub-arrays (modular sub-arrays are offshore floating photovoltaic platforms, and a single sub-array contains a number of photovoltaic components and supporting floating bodies) at sea. This modular architecture has the significant advantages of flexible construction and transportation and strong site adaptability. In this structural system, the design and selection of the connection node are crucial and directly affect the stability, wind and wave resistance, and overall service life of the platform. The connection node technology currently applied to offshore floating structures (such as offshore floating photovoltaic platforms) mainly includes three basic forms: rigid connection, flexible connection, and hinged connection.

[0005] However, under the long-term and cyclic action of wind, wave, and flow, etc. marine environmental dynamic loads, the above existing connection forms all face their own inherent limitations. Among them, for the rigid connection node, it can effectively improve the overall stiffness and carrying capacity of the floating platform, but its rigid constraint characteristics often lead to significant stress concentration phenomena under severe sea conditions, reducing the impact resistance of the node itself, aggravating the risk of fatigue damage, and posing a serious threat to the long-term durability and reliability of the structure. In addition, for the flexible connection node, it has excellent buffering and energy dissipation characteristics due to its deformability, which helps to disperse environmental loads and prolong the service life of the structure, but its low overall stiffness may lead to excessive displacement response of the platform under wave action, affecting the precise light alignment of the photovoltaic components above, and thus indirectly affecting the power generation efficiency; at the same time, flexible materials often face accelerated aging and long-term performance degradation problems in harsh marine environments. In addition, for the hinged connection node, it strives to seek a balance between rigidity and flexibility, allowing the node to rotate to release internal forces and promote modular deployment, but the rotating pair under the combined action of continuous dynamic loads and corrosive environments has an unavoidable risk of wear and fatigue failure.

[0006] At present, with the development trend of large-scale and deeper sea of offshore floating photovoltaic, higher requirements are put forward for the performance of the connecting node in harsh environment. The existing various node schemes are difficult to meet the comprehensive needs of high bearing strength, effective displacement control, excellent fatigue resistance and long-term environmental durability.

[0007] Therefore, it is urgent to develop a technology to solve the above technical problems. SUMMARY

[0008] The purpose of the present application is to provide a rigid connection module suitable for offshore floating photovoltaic platforms and an offshore floating photovoltaic power station to solve the technical defects of the prior art.

[0009] Therefore, the present application provides a rigid connection module suitable for offshore floating photovoltaic platforms, characterized in that it comprises a rigid connection node, a composite limiting bolt and an anti-falling structure.

[0010] The rigid connection node is provided with a composite limiting bolt.

[0011] The composite limiting bolt is connected with the connecting steel plate through the anti-falling structure.

[0012] In addition, the present application also provides an offshore floating photovoltaic power station comprising a plurality of offshore floating photovoltaic platforms.

[0013] The top of the offshore floating photovoltaic platform is provided with a plurality of photovoltaic panels.

[0014] The outer edges of any two adjacent offshore floating photovoltaic platforms are connected with the same connecting steel plate through a plurality of rigid connection modules as described above.

[0015] As can be seen from the technical solutions provided by the present application, compared with the prior art, the present application provides a rigid connection module suitable for offshore floating photovoltaic platforms and an offshore floating photovoltaic power station, which is designed scientifically. The rigid connection module of the present application is a new type of rigid connection node structure that takes into account structural reliability and environmental adaptability. This structure should be able to improve stress distribution, buffer energy consumption and prevent loosening and falling while ensuring overall rigidity and bearing efficiency, thereby providing a solid guarantee for the safe and efficient operation of large offshore floating photovoltaic platforms, which has great practical significance.

[0016] The present application aims to solve the structural adaptability defects existing in the connection technology of the existing offshore floating photovoltaic platform, and specifically aims at the problems of significant stress concentration of rigid nodes, insufficient overall rigidity of flexible connection, weak fatigue resistance of traditional nodes, and lack of anti-loosening mechanism under cyclic load, etc., and provides a rigid connection node module structure specially developed for marine environment. The module structure realizes controllable displacement response and energy dissipation in horizontal and vertical two degrees of freedom on the basis of ensuring the integrity and bearing strength of the platform structure, thereby significantly improving the reliability and service life of the offshore floating photovoltaic array in long-term complex sea conditions.

[0017] After inspection, the present application belongs to the design category of key connecting components of floating photovoltaic devices, involves multiple aspects such as structural mechanics, connection technology and offshore construction technology, and can be widely applied to the construction and operation of large-scale offshore floating photovoltaic power stations to improve the stability, safety and durability of the connection between platforms. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A three-dimensional axonometric view of an offshore floating photovoltaic power station (including multiple offshore floating photovoltaic platforms) of the present application;

[0019] Figure 2 A side view of an offshore floating photovoltaic power station (including multiple offshore floating photovoltaic platforms) of the present application;

[0020] Figure 3 A three-dimensional axonometric view of a rigid connection module suitable for offshore floating photovoltaic platforms provided by the present application;

[0021] Figure 4 A side view of a rigid connection module suitable for offshore floating photovoltaic platforms provided by the present application;

[0022] Figure 5 A bottom view of a rigid connection node in a rigid connection module suitable for offshore floating photovoltaic platforms provided by the present application;

[0023] Figure 6 A side view of a rigid connection node in a rigid connection module suitable for offshore floating photovoltaic platforms provided by the present application;

[0024] Figure 7 A front view of a composite limiting bolt in a rigid connection module suitable for offshore floating photovoltaic platforms provided by the present application;

[0025] Figure 8 A top view of a composite limiting bolt in a rigid connection module suitable for offshore floating photovoltaic platforms provided by the present application;

[0026] Figure 9 A disc spring group front view schematic diagram of a fall-preventing structure in a rigid connection module between offshore floating photovoltaic platforms is provided in the present application;

[0027] Figure 10 A disc spring group top view schematic diagram of a fall-preventing structure in a rigid connection module between offshore floating photovoltaic platforms is provided in the present application;

[0028] Figure 11 A three-dimensional schematic diagram of a disc spring group of a fall-preventing structure in a rigid connection module between offshore floating photovoltaic platforms is provided in the present application;

[0029] Figure 12 A top view schematic diagram of a connecting steel plate matched with a rigid connection module between offshore floating photovoltaic platforms is provided in the present application;

[0030] In the figure: 1 is an offshore floating photovoltaic platform;

[0031] 2 is a rigid connection node, 2-1 is an outer channel steel, 2-2 is an inner channel steel, 2-3 is a reinforcing connecting steel plate, 2-4 is an upper long circular hole, and 2-5 is a lower long circular hole;

[0032] 3 is a composite limiting bolt, 3-1 is a cylindrical iron block, and 3-2 is a long screw rod;

[0033] 4 is a fall-preventing structure, 4-1 is a spring washer, 4-2 is a disc spring group, and 4-3 is a nut;

[0034] 5 is a connecting steel plate, 6 is a photovoltaic panel, and 7 is an anchoring node. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In the description of the present application, it needs to be understood that the terms "installation", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0038] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0039] Referring to Figures 1 to 12 The present application provides a marine floating photovoltaic power station, comprising a plurality of (for example, four) marine floating photovoltaic platforms 1;

[0040] The top of the marine floating photovoltaic platform 1 is provided with a plurality of photovoltaic panels 6;

[0041] It should be noted that the plurality of photovoltaic panels 6 constitute the main body of the power generation unit

[0042] Any two adjacent marine floating photovoltaic platforms 1 top outer edges are connected to the same connecting steel plate 5 through a plurality of rigid connection modules 100;

[0043] Among them, the rigid connection module 100 includes a rigid connection node 2, a composite limiting bolt 3 and an anti-falling structure 4;

[0044] The rigid connection node 2 is provided with a composite limiting bolt 3;

[0045] The composite limiting bolt 3 is connected to the connecting steel plate 5 through the anti-falling structure 4.

[0046] It should be noted that in the present application, the rigid connection module 100 is a rigid connection module provided by the present application and suitable for offshore floating photovoltaic platforms.

[0047] In the present application, specifically, a plurality of rigid connection modules 100 are uniformly arranged on the peripheral top edge of the offshore floating body platform 1.

[0048] In the present application, specifically, each of the two offshore floating photovoltaic platforms 1 is provided with an anchoring node 7;

[0049] The anchoring node 7 is connected to the external anchoring system (such as external anchor piles, suction anchors and weight anchors) through an anchor chain.

[0050] It should be noted that the anchoring system refers to a device outside the structural system of the offshore floating photovoltaic platform 1 for fixing the offshore floating platform 1 at a specified position. Common forms of the anchoring system include anchor piles, suction anchors and weight anchors. The anchoring system is connected to the anchoring node 7 on the offshore floating photovoltaic platform through an anchor chain to realize the arrangement and fixation of the offshore floating photovoltaic platform as a whole in the sea environment.

[0051] It should be noted that the offshore floating photovoltaic platform 1 includes a conventional floating body unit, a photovoltaic panel 6 arranged on the upper part thereof, and an anchoring node 7 connected to the external anchoring system to realize the arrangement and fixation of the whole in the sea environment.

[0052] In the present application, as shown in Figures 3 to 6 The rigid connection node 2 includes a hollow peripheral channel steel 2-1, a hollow internal channel steel 2-2 and a reinforcing connection steel plate 2-3.

[0053] The internal channel steel 2-2 is arranged on the inner side of the peripheral channel steel 2-1.

[0054] The long edge direction of the internal channel steel 2-2 is the same as that of the peripheral channel steel 2-1, i.e. they are arranged in parallel with each other.

[0055] The bottom of the internal channel steel 2-2 has a first open slot along the long edge direction of the internal channel steel 2-2.

[0056] The top of the peripheral channel steel 2-1 has a second open slot along the long edge direction of the peripheral channel steel 2-1. The two sides of the second open slot are in contact with the top of the internal channel steel 2-2, and the positions where the two sides of the second open slot are in contact with the top of the internal channel steel 2-2 are respectively welded with a reinforcing connection steel plate 2-3.

[0057] The bottom of the peripheral channel steel 2-1 is provided with a lower long circular hole 2-5 along the long edge direction of the peripheral channel steel 2-1.

[0058] The lower elongated hole 2-5 is located inside the first opening groove;

[0059] The top of the inner channel steel 2-2 is located above the lower elongated hole 2-5, and an upper elongated hole 2-4 is provided along the long side of the inner channel steel 2-2.

[0060] The upper elongated hole 2-4 is located inside the second opening groove.

[0061] In practice, the width of the lower elongated hole 2-5 is greater than the width of the upper elongated hole 2-4;

[0062] In practice, the length of the lower elongated hole 2-5 is greater than the length of the upper elongated hole 2-4;

[0063] In terms of specific implementation, the overall front sectional shape of the outer channel steel 2-1 is an isosceles trapezoid.

[0064] The overall front sectional shape of the internal channel steel 2-2 is rectangular.

[0065] In practice, the center line of the upper long circular hole 2-4 is aligned vertically with the center line of the lower long circular hole 2-5.

[0066] It should be noted that, for the rigid connection node of the present invention, during assembly, the two legs of the outer channel steel 2-1 are first bent to fit against the outer surface of the inner channel steel 2-2, and a reinforcing connecting steel plate 2-3 is welded and fixed at the contact point, thereby firmly combining the outer channel steel 2-1 and the inner channel steel 2-2 to form an overall stable load-bearing frame structure. Elongated holes are respectively opened at the bottom of the outer channel steel 2-1 and the top of the inner channel steel 2-2, with a smaller upper elongated hole 2-4 opened at the top of the inner channel steel 2-2 and a larger lower elongated hole 2-5 opened at the bottom of the outer channel steel 2-1, to realize the assembly and load-bearing functions of the subsequent limiting components.

[0067] It should be noted that the rigid connection node is composed of an orthogonally nested outer channel steel and an inner channel steel to form the main frame. The two are fixed together as a whole by a reinforced connecting steel plate welded on the outside, forming a box-type load-bearing unit with high bending and torsional stiffness. At the node, the inner channel steel 2-2 has a small upper elongated hole 2-4 to allow the long screw 3-2 to pass through; the outer channel steel 2-1 has a large lower elongated hole 2-5 to allow the cylindrical iron block 3-1 of the composite limit bolt 3 to pass through and prevent it from falling off.

[0068] In this invention, such as Figure 7 and Figure 8 As shown, the composite limiting bolt 3 includes a cylindrical iron block 3-1 and a long screw 3-2;

[0069] Cylindrical iron block 3-1 is located inside the cavity of internal channel steel 2-2;

[0070] The diameter of the cylindrical iron block 3-1 is less than or equal to the width of the lower long hole 2-5 of the peripheral channel steel 2-1;

[0071] The diameter of the cylindrical iron block 3-1 is greater than the transverse width of the upper long hole 2-4 of the internal channel steel 2-2;

[0072] The height of the cylindrical iron block 3-1 is equal to the sum of the thickness of the peripheral channel steel 2-1 and the height of the internal channel steel 2-2;

[0073] The top center position of the cylindrical iron block 3-1 is welded with a long screw 3-2;

[0074] The long screw 3-2 passes through the upper long hole 2-4 of the internal channel steel 2-2;

[0075] The upper part of the long screw 3-2 is connected with the connecting steel plate 5 through the anti-falling structure 4;

[0076] It should be noted that for the composite limiting bolt 3, the cylindrical iron block 3-1 serves as a limiting end part, and its diameter is less than or equal to the width of the lower long hole 2-5 of the peripheral channel steel 2-1, which can play a limiting role. A long screw 3-2 is welded at the center position of the cylindrical iron block 3-1, and the upper end of the long screw 3-2 passes through the upper long hole 2-4 of the internal channel steel 2-2. The advantages of this structure are that under normal working conditions, a certain horizontal relative displacement between offshore floating photovoltaic platforms is allowed, thereby reducing the structural internal force concentration; under extreme working conditions, the upper long hole 2-4 and the lower long hole 2-5 can limit the excessive movement of the composite limiting bolt 3, form a limiting effect, and prevent collision and failure caused by excessive relative displacement of the platform.

[0077] In specific implementation, the bottom of the rigid connection node 2 (specifically the bottom of the peripheral channel steel 2-1) is welded and fixed at the top edge of the offshore floating photovoltaic platform 1.

[0078] It should be noted that for the composite limiting bolt 3, the upper part of the long screw 3-2 passes through the upper long hole of the internal channel steel and is connected with the connecting steel plate 5, and is fastened through a spring washer, a disc spring group and a nut, forming an anti-loose and energy dissipation structure.

[0079] It should be noted that the composite limiting bolt 3 is composed of a cylindrical iron block 3-1 and a long screw 3-2, and the diameter of the cylindrical iron block 3-1 is less than or equal to the transverse width of the lower long hole 2-5 of the peripheral channel steel 2-1, which constitutes a hard limiting block; during construction, the composite limiting bolt 3 needs to pass through the long hole 2-5 provided at the bottom of the external channel steel 2-1, and then the bottom of the rigid connection node 2 (specifically the bottom of the peripheral channel steel 2-1) is welded outside the edge of the offshore floating platform 1.

[0080] It should be noted that for the present application, the composite limiting bolt 3 is located inside the rigid connection node 2 as a whole, and through the two long holes, i.e. the upper long hole 2-4 and the lower long hole 2-5, the function of "limited slip, mechanical limiting, and collision suppression" is achieved. The bottom of the rigid connection node 2 (specifically, the bottom of the peripheral channel steel 2-1) is arranged at the top edge position of the offshore floating platform 1 by welding. Under the action of conventional sea state load, the composite limiting bolt 3 can slip between the two long holes, i.e. the upper long hole 2-4 and the lower long hole 2-5, and in the extreme sea state, when the composite limiting bolt 3 slips to the end of the upper long hole 2-4, the limit limiting is triggered, and the length of the two long holes can be flexibly increased or shortened according to the sea state of the sea area.

[0081] In the present application, as shown in Figures 9 to 11 The anti-falling structure 4 includes a spring washer 4-1, a disc spring group 4-2, and a nut 4-3.

[0082] The disc spring group 4-2 is sleeved on the upper part of the long screw rod 3-2 of the composite limiting bolt 3.

[0083] The bottom surface of the disc spring group 4-2 is located between the top surface of the internal channel steel 2-2, and a connecting steel plate 5 is arranged therebetween.

[0084] The long screw rod 3-2 of the composite limiting bolt 3 passes through the connecting steel plate 5 vertically at the upper part.

[0085] Further, one spring washer 4-1 is arranged on each of the upper and lower sides of the disc spring group 4-2, and both spring washers 4-1 are sleeved on the upper part of the long screw rod 3-2 of the composite limiting bolt 3.

[0086] Of the two spring washers 4-1, one spring washer 4-1 is in contact with the top surface of the internal channel steel 2-2 of the rigid connection node 2, and the other spring washer 4-1 is in contact with the top surface of the disc spring group 4-2.

[0087] The bottom surface of the disc spring group 4-2 is located between the top surface of the internal channel steel 2-2, and a connecting steel plate 5 is arranged therebetween.

[0088] Specifically, the connecting steel plate 5 is provided with a vertical through hole at a position corresponding to the long screw rod 3-2 of the composite limiting bolt 3.

[0089] Specifically, the bottom surface of the nut 4-3 is in contact with the top surface of the spring washer 4-1 located on the top surface of the disc spring group 4-2, and is threadedly fixedly connected with the long screw rod 3-2 of the composite limiting bolt 3.

[0090] Specifically, the disc spring group 4-2 is composed of three disc springs stacked together, which is used to provide axial elastic constraint and dissipate kinetic energy, and suppress the loss of pre-tightening force of the long bolt 3-2 of the composite limiting bolt 3 under high-frequency vibration.

[0091] It should be noted that the spring washer is located on the upper and lower sides of the connecting steel plate 5, used to compensate for installation tolerance and enhance system fault tolerance.

[0092] It should be noted that the connecting steel plate 5 is uniformly holed at the position corresponding to the long bolt 3-2 of the composite limiting bolt 3, used to connect the rigid connection node 2 at the adjacent position, and its both ends are beveled.

[0093] It should be noted that, as shown in Figures 9 to 11 The outer end of the composite limiting bolt 3 is sequentially sleeved with a spring washer 4-1 and a disc spring group 4-2, and is fastened by a nut 4-3 to form an anti-falling structure 4. Among them, the disc spring group 4-2 can provide axial buffering performance under stress state, so that the connecting node has certain deformation ability while meeting the strength requirement, can realize the anti-loose and energy dissipation function of the node, and improve the reliability of the connection, thereby further reducing the fatigue effect between the platforms caused by wave load.

[0094] It should be noted that, as shown in Figure 12 The long screw 3-2 of the composite limiting bolt 3 passes through the connecting steel plate 5, and through the arrangement of the connecting steel plate 5, the rigid connection between different floating body platforms can be realized, which can effectively prevent the mutual collision between the platforms. At the same time, the connecting steel plate 5 has certain bending ability, which can limit the freedom of the platform in the vertical direction without completely rigid locking, thereby improving the adaptability of the platform under wave load.

[0095] In order to more clearly understand the technical scheme of the present application, the working process of the present application is described below.

[0096] In the implementation, first, the long screw 3-2 is welded with the cylindrical iron block 3-1 to form a composite limiting bolt 3;

[0097] Then, the composite limiting bolt 3 is sequentially inserted from the lower long circular hole 2-5 of the peripheral channel steel 2-1, and the limiting assembly is completed;

[0098] It should be noted that for the present application, the long screw 3-2 is directly welded on the top center position of the cylindrical iron block 3-1 during processing, and the two form a composite limiting bolt 3 which passes through the bottom long circular hole 2-5 of the external channel steel 2-1, and the upper end of the long screw 3-2 passes through the upper long circular hole 2-4 of the internal channel steel 2-2.

[0099] Subsequently, the rigid connection module 100 (which includes the rigid connection node 2, the composite limiting bolt 3 and the anti-falling structure 4) is fixedly arranged at the edge position of the offshore floating photovoltaic platform 1, and the rigid connection node 2 is integrally formed by the peripheral channel steel 2-1, the internal channel steel 2-2 and the reinforcing connection steel plate 2-3.

[0100] The bottom of the rigid connection node 2 (specifically, the bottom of the peripheral channel steel 2-1) is welded and fixed at the top edge of the offshore floating photovoltaic platform 1.

[0101] Finally, the spring washer 4-1, the connecting steel plate 5, the disc spring group 4-2, the spring washer 4-1 and the nut 4-3 are sequentially installed at the outer end (i.e., the upper end) of the long screw rod 3-2 of the composite limiting bolt 3, and are fastened, so that the assembly of the rigid connection module 100 is completed.

[0102] Therefore, for multiple offshore floating photovoltaic platforms 1, the top edges of any two adjacent offshore floating photovoltaic platforms 1 can be connected by multiple rigid connection modules 100 and the same connecting steel plate 5, to achieve reliable connection between the two;

[0103] In summary, the node structure manufacturing process of the present application is mature, and the installation and disassembly are convenient. The above structure realizes high-strength and high-reliability rigid connection between the floating platforms, and the composite limiting bolt 3 and the disc spring group 4-2 are introduced to provide necessary sliding and buffering and anti-loosening performance, so that the node can not only withstand complex loads in the offshore environment, but also effectively reduce the risk of stress concentration and fatigue failure, thereby meeting the high-standard requirements of future large-scale offshore floating photovoltaic systems for structural safety and durability.

[0104] It should be noted that for the present application, the composite limiting bolt 3 mainly provides a controllable horizontal sliding space through the upper long circular hole 2-4 and the lower long circular hole 2-5. The cylindrical iron block 3-1 of the composite limiting bolt 3 can produce limited sliding in the lower long circular hole 2-5, reducing stress concentration and avoiding structural fatigue caused by excessive displacement; at the same time, when the offshore floating photovoltaic platform displacement exceeds a certain range, the end limiting effect of the two long circular holes will be apparent, playing a role in limiting sliding, avoiding excessive displacement between platforms and causing collision or structural damage. The length of the two long circular holes can be flexibly set according to the local sea conditions.

[0105] For the present application, the disc spring group 4-2 can be composed of 3 disc springs, and the number of disc spring groups can be flexibly set according to the local sea conditions. The functions of the disc spring group 4-2 include: first, the disc spring group 4-2 effectively absorbs and alleviates these impact forces mainly through its elastic deformation characteristics, dissipates kinetic energy, thereby reducing the impact on the connection node; second, the disc spring group 4-2 can alleviate the relative movement between the platforms, reduce the vibration effect of the platform structure caused by sudden load, and reduce the repeated impact of cyclic load on the rigid connection node. At the same time, the disc spring group can maintain the fixed fastening state of the long screw rod 3-2 of the composite limiting bolt 3 through its superimposed elasticity and pre-tightening force, preventing the nut 4-3 and the composite limiting bolt from loosening due to vibration or load changes during long-term operation. Finally, the disc spring has high fatigue resistance and elastic recovery force, can maintain stable pre-tightening force in high-frequency vibration, ensures that the connection does not fail due to loosening, and avoids structural instability or failure caused by loosening.

[0106] Compared with the prior art, the rigid connection module suitable for the offshore floating photovoltaic platform and the offshore floating photovoltaic power station provided by the present application have the following beneficial effects:

[0107] 1. The rigid connection node of the present application adopts a full bolt assembly structure, and the node components can be pre-fabricated in a factory and assembled quickly at sea, significantly reducing construction complexity and maintenance cost, and providing a technical basis for large-capacity floating photovoltaic power stations.

[0108] 2. The rigid connection node of the present application has both rigid constraint and limited flexible buffering in structure, which can effectively reduce the risk of stress concentration, improve durability, and prolong the service life of the node.

[0109] 3. The rigid connection node of the present application integrates multiple functions such as bearing, anti-collision, limiting, anti-loosening and energy dissipation, and is suitable for long-term operation in complex marine environments.

[0110] 4. In view of the problem that the traditional rigid node is prone to stress concentration and fatigue damage when the displacement tolerance is insufficient, the present application designs large and small long circular holes to allow a certain amount of slip between the platforms under normal working conditions, and forms a limiting constraint under extreme working conditions, thereby realizing the dual functions of slip and limiting.

[0111] 5. In the face of impact and vertical uneven stress caused by wave load, the connection steel plate of the present application not only bears the cross-connection function, but also has bending deformation capability, which can provide flexible constraint in the vertical direction to avoid complete rigid locking of the node.

[0112] 6. To address the problem of bolts easily loosening under dynamic conditions, this invention uses a combination of disc spring assembly and spring washer to form an anti-loosening and buffering system, which can maintain a long-lasting preload and absorb energy and reduce vibration under load, significantly improving connection reliability.

[0113] 7. The structure of this invention has a mature manufacturing process and is easy to assemble. It can simultaneously meet the requirements of high-strength connection, moderate slippage, limit protection and fatigue resistance under complex sea conditions, providing an efficient and durable node solution for the long-term safe operation of large-scale floating photovoltaic platforms.

[0114] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rigid connection module suitable for use between offshore floating photovoltaic platforms, characterized in that, It includes rigid connection nodes (2), composite limiting bolts (3), and anti-detachment structure (4); A composite limiting bolt (3) is provided on the rigid connection node (2); The composite limiting bolt (3) is connected to the connecting steel plate (5) through the anti-loosening structure (4).

2. The rigid connection module for use between floating photovoltaic platforms at sea as described in claim 1, characterized in that, The rigid connection node (2) includes a hollow outer channel steel (2-1), a hollow inner channel steel (2-2), and a reinforcing connection steel plate (2-3); An inner channel steel (2-2) is provided on the inner side of the outer channel steel (2-1); The long side of the inner channel steel (2-2) runs in the same direction as the long side of the outer channel steel (2-1), that is, they are set parallel to each other; The bottom of the inner channel steel (2-2) has a first opening slot along the long side of the inner channel steel (2-2); The top of the outer channel steel (2-1) has a second opening groove along the long side of the outer channel steel (2-1). The two sides of the second opening groove are in contact with the top two sides of the inner channel steel (2-2), and a reinforcing connecting steel plate (2-3) is welded to the two sides of the second opening groove in contact with the top two sides of the inner channel steel (2-2). At the bottom of the outer channel steel (2-1), there is a lower elongated hole (2-5) along the long side of the outer channel steel (2-1); The lower elongated hole (2-5) is located inside the first opening groove; The top of the inner channel steel (2-2) is provided with an upper elongated hole (2-4) above the lower elongated hole (2-5), which runs along the long side of the inner channel steel (2-2); The upper elongated hole (2-4) is located inside the second opening groove.

3. The rigid connection module for use between offshore floating photovoltaic platforms as described in claim 2, characterized in that, The width of the lower elongated hole (2-5) is greater than the width of the upper elongated hole (2-4); The center line of the upper elongated hole (2-4) is aligned vertically with the center line of the lower elongated hole (2-5); The length of the upper elongated hole (2-4) is less than the length of the lower elongated hole (2-5); The overall front sectional shape of the outer channel steel (2-1) is an isosceles trapezoid; The overall front sectional shape of the internal channel steel (2-2) is rectangular.

4. The rigid connection module for use between floating photovoltaic platforms at sea as described in claim 1, characterized in that, The composite limiting bolt (3) includes a cylindrical iron block (3-1) and a long screw (3-2); The cylindrical iron block (3-1) is located inside the cavity of the internal channel steel (2-2); The diameter of the cylindrical iron block (3-1) is less than or equal to the width of the lower oblong hole (2-5) of the outer channel steel (2-1); The diameter of the cylindrical iron block (3-1) is greater than the transverse width of the upper oblong hole (2-4) of the inner channel steel (2-2); The height of the cylindrical iron block (3-1) is equal to the sum of the thickness of the outer channel steel (2-1) and the height of the inner channel steel (2-2); A long screw 3-2 is welded to the center of the top of the cylindrical iron block (3-1); The long screw 3-2 passes through the upper elongated hole (2-4) of the inner channel steel (2-2); The upper part of the long screw (3-2) is connected to the connecting steel plate (5) through the anti-detachment structure (4).

5. The rigid connection module for use between offshore floating photovoltaic platforms as described in claim 4, characterized in that, The anti-detachment structure (4) includes a spring washer (4-1), a disc spring assembly (4-2), and a nut (4-3); The disc spring assembly (4-2) is sleeved on the upper part of the long screw (3-2) of the composite limiting bolt (3); A connecting steel plate (5) is provided between the bottom surface of the disc spring assembly (4-2) and the top surface of the internal channel steel (2-2); The upper part of the long screw (3-2) of the composite limiting bolt (3) passes vertically through the connecting steel plate (5).

6. The rigid connection module for use between offshore floating photovoltaic platforms as described in claim 5, characterized in that, A spring washer (4-1) is provided on the upper and lower sides of the disc spring assembly (4-2), and both spring washers (4-1) are sleeved on the upper part of the long screw (3-2) of the composite limiting bolt (3); For the two spring washers (4-1), one spring washer (4-1) is in contact with the top surface of the inner channel steel (2-2) of the rigid connection node (2), and the other spring washer (4-1) is in contact with the top surface of the disc spring assembly (4-2); A connecting steel plate (5) is provided between the bottom surface of the disc spring assembly (4-2) and the spring washer (4-1) located on the top surface of the inner channel steel (2-2).

7. The rigid connection module for use between offshore floating photovoltaic platforms as described in claim 5, characterized in that, The connecting steel plate (5) has a vertical through hole at a position corresponding to the long screw (3-2) of the composite limiting bolt (3).

8. The rigid connection module for use between offshore floating photovoltaic platforms as described in claim 5, characterized in that, The bottom surface of the nut (4-3) is in close contact with the top surface of the spring washer (4-1) located on the top surface of the disc spring assembly (4-2), and is threadedly fixed to the long screw (3-2) of the composite limit bolt (3).

9. The rigid connection module for use between offshore floating photovoltaic platforms as described in claim 1, characterized in that, The disc spring assembly (4-2) is composed of three disc springs stacked together. It is used to provide axial elastic constraint and dissipate kinetic energy, and suppress the preload loss of the long bolt (3-2) of the composite limit bolt (3) under high frequency vibration.

10. A floating photovoltaic power station at sea, characterized in that, Including multiple offshore floating photovoltaic platforms (1); Multiple photovoltaic panels (6) are installed on the top of the floating photovoltaic platform (1); The outer edges of the top of any two adjacent floating photovoltaic platforms (1) are connected to the same connecting steel plate (5) by a plurality of rigid connection modules (100) as described in any one of claims 1 to 9.

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