Offshore power generation photovoltaic module

Abstract

The utility model relates to the field of photovoltaic modules, provides an offshore power generation photovoltaic module, and solves the problems that an existing offshore photovoltaic module is relatively poor in mechanical strength and photoelectric conversion efficiency and low in assembly construction degree. The photovoltaic module body comprises a fixed support structure and a photovoltaic module, the fixed support structure comprises pile foundations, steel strands, upper chords and supporting rods, the pile foundations comprise a first pile foundation and a second pile foundation, the first pile foundation is a group of fork piles, and the second pile foundation is a single pile; the photovoltaic assembly comprises a composite photovoltaic panel and an aluminum alloy frame wrapping the periphery of the composite photovoltaic panel, and the upper chord is connected with the upper end of the pile foundation through a plurality of double-bolt connecting pieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module field especially relates to a sea power generation photovoltaic module. BACKGROUND

[0002] Photovoltaic power generation is the most effective form of developing and utilizing solar energy resources today, and abundant solar energy resources provide favorable conditions for the development of photovoltaic power generation in China. At present, with the continuous growth of land photovoltaic installed capacity, land resources and related policy restrictions are becoming key factors restricting the large-scale development of photovoltaic power. Therefore, offshore photovoltaic power has begun to develop gradually. Compared with land photovoltaic power, offshore photovoltaic power needs to withstand greater wind load, and also needs to consider additional factors such as wave load, soft soil foundation, and high-salt marine corrosion environment, so the design difficulty is relatively greater. The existing offshore photovoltaic power mainly has two structural types of fixed photovoltaic power and floating photovoltaic power.

[0003] Chinese patent application No. 202321871438.8 discloses a floating box for offshore photovoltaic power, an offshore photovoltaic device, and an offshore photovoltaic system. The floating box for offshore photovoltaic power includes a floating box body, a mounting rack, a support, and a cleaning pipe. The mounting rack is connected to the floating box body and is used to connect the photovoltaic module. The support is connected to the mounting rack, and the cleaning pipe is connected to the support. The cleaning pipe is used to transmit cleaning liquid to clean the photovoltaic module. In this way, by transmitting cleaning liquid into the cleaning pipe, the cleaning liquid can be sprayed on the photovoltaic module to clean it in time, avoid pollutants blocking the photovoltaic module, and make the photovoltaic module better for photoelectric conversion, thereby improving the power generation efficiency. It also avoids the impact of sea waves on the mounting rack and the photovoltaic module, which may leave debris or produce salt crystals on the photovoltaic module, and can also clean the pollutants left by seabirds on the photovoltaic module in time, greatly reducing the dirt on the surface of the photovoltaic module and reducing the impact on the power generation efficiency of the photovoltaic module. However, the floating box for offshore photovoltaic power is easily affected by natural factors such as strong winds, water level changes, and icing, which may cause damage to the photovoltaic module or reduce the power generation efficiency.

[0004] Chinese patent application No. 202421222688.3 discloses a support structure of a floating photovoltaic power generation system, comprising a floating assembly, a support assembly and a culture assembly. The floating assembly comprises a floating pipe and a floating box; the support assembly comprises a erecting unit, the erecting unit comprises a first support rod and a connecting cable, the connecting cable is provided with a photovoltaic panel, the first support rod is installed on the floating box, and the first support rod supports the connecting cable, so that the connecting cable can form a pre-tightening force, so that the distance between the bottom surface of the connecting cable and the water surface is d, and the distance satisfies 1.2m≤d≤2.3m; the connecting cable is erected by the first support rod, so that the distance between the connecting cable and the water surface is d, and the distance satisfies 1.2m≤d≤2.3m, which can not only reserve sufficient space between the photovoltaic panel and the floating pipe, but also appropriately reduce the gravity center of the whole support structure, thereby improving the working efficiency and safety. However, the assembly degree of the support structure and the photovoltaic assembly is low when they are connected. Content of the utility model

[0005] Therefore, in view of the above problems, the utility model provides a marine power generation photovoltaic assembly, which solves the problems of relatively poor mechanical strength, heat-resistant fireproof performance and photoelectric conversion efficiency of the existing photovoltaic assembly and low assembly degree.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A marine power generation photovoltaic assembly, comprising a photovoltaic assembly body, the photovoltaic assembly body comprising a fixed support structure and a photovoltaic assembly, the fixed support structure comprising a pile foundation, a steel strand, a top chord and a strut, the pile foundation comprising a first pile foundation and a second pile foundation, the first pile foundation being a group of forked piles, and the second pile foundation being a single pile; the photovoltaic assembly comprising a composite photovoltaic panel and an aluminum alloy frame wrapping around the composite photovoltaic panel, the top chord being connected to the upper end of the pile foundation through a plurality of double bolt connecting pieces; the photovoltaic assembly being laminated with the upper surface of the top chord, the second pile foundation being connected to the lower surface of the top chord, and the upper end of the first pile foundation and the upper end of the second pile foundation both being connected to the top chord; the upper end of the first pile foundation and the upper end of the second pile foundation being connected through the steel strand, and the top chord and the steel strand being connected through the vertically arranged strut.

[0008] Further, the number of the top chords is greater than or equal to 2.

[0009] Further, the double bolt connecting piece comprises a half-threaded bolt, a full-threaded bolt and a connecting sleeve connecting the half-threaded bolt and the full-threaded bolt, and a backing plate is arranged between the half-threaded bolt and the connecting sleeve.

[0010] Further, the composite photovoltaic panel comprises a glass cover plate layer, a first EVA layer, a cell piece, a second EVA layer and a TPT back plate layer which are sequentially laminated from top to bottom.

[0011] Further, the photovoltaic module body is suitable for offshore sea area.

[0012] Further, the upper chord adopts a circular steel pipe with a specification of φ610*10.

[0013] The circular steel pipe with the specification of φ610*10 is a circular steel pipe with an outer diameter of 610 mm and a wall thickness of 10 mm.

[0014] Further, the steel strand has a specification of 6φ s 15.2.

[0015] The specification of 6φs15.2 means that the steel strand is twisted by six steel wires and has a diameter of 15.2 mm.

[0016] Further, the strut adopts a circular steel pipe with a specification of φ100*8.

[0017] The circular steel pipe with the specification of φ100*8 is a circular steel pipe with an outer diameter of 100 mm and a wall thickness of 8 mm.

[0018] Further, the pile foundation adopts a PHC800 pipe pile.

[0019] By adopting the foregoing technical solutions, the photovoltaic module has the following beneficial effects:

[0020] 1. The uppermost layer of the composite photovoltaic panel is a glass cover plate, which can effectively prevent the influence of external environment such as dust, moisture, oxidation, etc. on the solar cell. At the same time, the glass layer also has good mechanical strength, tensile strength and heat-resistant and fireproof performance, which can support the photovoltaic panel and maintain its overall strength. In addition, the glass layer can also improve the photoelectric conversion efficiency by changing the propagation path of light, etc. The EVA layer (polyethylene-polyvinyl acetate copolymer) has good flexibility and heat sealing property, which can firmly bond each layer together to form a good airtight packaging structure. The cell is the core part of the photovoltaic panel, which can convert solar energy into electrical energy. By optimizing the arrangement and connection mode of the cell, the photoelectric conversion efficiency of the photovoltaic panel can be improved, thereby generating more electrical energy. The TPT backboard layer is a back protection and packaging material of the photovoltaic panel. The TPT back film has the characteristics of aging resistance, corrosion resistance and air tightness. It can effectively prevent water vapor erosion and ultraviolet radiation damage to the cell, further improving the durability and reliability of the photovoltaic panel. The aluminum alloy frame is an important component of the photovoltaic panel, which can encapsulate the cell, glass, backboard and other materials, and enhance the overall strength of the assembly.

[0021] 2. The upper chord is connected with the upper end of the pile foundation by using the double bolt connector, the shearing part of the connector is the non-threaded part of the half tooth short bolt, and the shearing capacity of the bolt can be fully utilized; when the structure reaches the service life or needs to replace parts, the short bolt is screwed out to realize the separation of the upper chord and the first pile foundation, and the disassembly is simple, the assembly construction degree is high, in addition, the existence of the gasket can make the clamping height of the pre-tightening force larger, thereby effectively avoiding the problem of pre-tightening force relaxation, and the stress performance of the upper chord is not greatly affected.

[0022] 3. The fixed support structure of the utility model adopts a beam string type flexible support structure, which can reduce the damage of instantaneous impact force to the structure and prolong the service life; lightweight design reduces transportation and installation costs, and is especially suitable for scenes with limited offshore transportation; standardized components can be quickly assembled, shorten the construction period and improve the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic view of the offshore power generation photovoltaic module in the embodiment of the utility model;

[0024] Fig. 2 is a structural schematic view of the double bolt connector in the embodiment of the utility model;

[0025] Fig. 3 is a structural schematic view of the composite photovoltaic plate in the embodiment of the utility model;

[0026] Fig. 4 is a top view of the photovoltaic module 2 in the embodiment of the utility model;

[0027] Explanation of reference numerals in the drawing: 1-fixed support structure, 2-photovoltaic module, 11-pile foundation, 12-steel strand, 13-upper chord, 14-strut, 111-first pile foundation, 112-second pile foundation, 21-composite photovoltaic plate, 22-aluminum alloy frame, 3-double bolt connector, 31-half tooth bolt, 32-full tooth bolt, 33-connection sleeve, 34-gasket, 211-glass cover plate layer, 212-first EVA layer, 213-cell piece, 214-second EVA layer, 215-TPT back plate layer. DETAILED DESCRIPTION

[0028] The embodiment of the utility model is:

[0029] Reference Figs. 1 to 4The utility model provides an offshore power generation photovoltaic module, including photovoltaic module body, the photovoltaic module body includes fixed support structure 1 and photovoltaic module 2, the fixed support structure 1 includes pile foundation 11, steel strand 12, upper chord 13, bracing 14, the pile foundation 11 includes first pile foundation 111 and second pile foundation 112, the first pile foundation 111 is a group of forked piles, and the second pile foundation 112 is single pile, the photovoltaic module 2 includes composite photovoltaic panel 21 and the aluminum alloy frame 22 that is wrapped around the composite photovoltaic panel, the upper chord 13 is connected with the upper end 11 of pile foundation through a plurality of double bolt connectors 3, the photovoltaic module 2 is laminated with the upper surface of upper chord 13, the second pile foundation 112 is connected with the lower surface of upper chord 13, the upper end of first pile foundation 111, the upper end of second pile foundation 112 are connected with upper chord 13, the upper end of first pile foundation 111 and the upper end of second pile foundation 112 are connected through steel strand 12, and the upper chord 13 is connected with steel strand 13 through the bracing 14 of vertical arrangement, the number of the upper chord 13 is 2.

[0030] Among them, the double bolt connector 3 includes half tooth bolt 31, full tooth bolt 32 and connecting sleeve 33 connected half tooth bolt, full tooth bolt, and the half tooth bolt 31 and connecting sleeve 33 are provided with the backing plate 34.

[0031] The composite photovoltaic panel 21 includes glass cover plate layer 211, first EVA layer 212, cell piece 213, second EVA layer 214, TPT backboard layer 215 arranged in sequence from top to bottom.

[0032] The photovoltaic module body is suitable for offshore waters. The upper chord adopts round steel pipe with the specification of φ610x10, that is, the round steel pipe with the outer diameter of 610mm and the wall thickness of 10mm. The steel strand has the specification of 6φ s 15.2, and the specification of 6φs15.2 means that the steel strand is twisted by six steel wires, and the diameter is 15.2mm. The bracing adopts round steel pipe with the specification of φ100x8, that is, the round steel pipe with the outer diameter of 100mm and the wall thickness of 8mm.

[0033] Although the utility model is specifically shown and introduced in combination with the preferred implementation, those skilled in the art should understand that various changes can be made to the utility model in form and detail without departing from the spirit and scope of the utility model defined in the appended claims, and all are within the protection scope of the utility model.

Claims

1. A marine photovoltaic module, comprising a photovoltaic module body, characterized in that: The photovoltaic module body includes a fixed support structure and a photovoltaic module. The fixed support structure includes a pile foundation, steel strands, a top chord, and struts. The pile foundation includes a first pile foundation and a second pile foundation. The first pile foundation is a set of forked piles, and the second pile foundation is a single pile. The photovoltaic module includes a composite photovoltaic panel and an aluminum alloy frame surrounding the composite photovoltaic panel. The top chord is connected to the upper end of the pile foundation by several double-bolt connectors. The photovoltaic module is stacked on the upper surface of the top chord, and the second pile foundation is connected to the lower surface of the top chord. The upper ends of the first pile foundation and the second pile foundation are both connected to the top chord. The upper ends of the first pile foundation and the second pile foundation are connected by steel strands, and the top chord and the steel strands are connected by vertically arranged struts.

2. The offshore photovoltaic module according to claim 1, characterized in that: The number of upper strings is ≥2.

3. A marine photovoltaic module according to claim 1, characterized in that: The double-bolt connector includes a half-threaded bolt, a full-threaded bolt, and a connecting sleeve connecting the half-threaded bolt and the full-threaded bolt, with a washer provided between the half-threaded bolt and the connecting sleeve.

4. A marine photovoltaic module according to claim 1, characterized in that: The composite photovoltaic panel includes, from top to bottom, a glass cover layer, a first EVA layer, a solar cell, a second EVA layer, and a TPT backsheet layer.

5. A marine photovoltaic module according to claim 1, characterized in that: The photovoltaic module body is suitable for nearshore waters.

6. A marine photovoltaic module according to claim 1, characterized in that: The upper chord is made of a round steel pipe with a specification of φ610×10.

7. A marine photovoltaic module according to claim 1, characterized in that: The specifications of the steel strand are 6φ15.

2.

8. A marine photovoltaic module according to claim 1, characterized in that: The support rod is made of round steel pipe with a specification of φ100×8.

9. A marine photovoltaic module according to claim 1, characterized in that: The pile foundation uses PHC800 pipe piles.

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