A marine photovoltaic anti-icing device, supporting structure and photovoltaic system for ice-covered areas

Abstract

This invention provides an anti-icing device, supporting structure, and photovoltaic system for offshore photovoltaic systems operating in ice-covered areas. The anti-icing device includes concentrically nested inner and outer protective layers, with an energy-absorbing layer filling the space between them. The energy-absorbing layer comprises several layers of energy-absorbing mechanism arrays, with each layer's energy-absorbing mechanisms arranged circumferentially. Each energy-absorbing mechanism is a frame-type structure with a certain degree of elasticity. This invention can improve the service life of pile foundations, reduce subsequent operation and maintenance costs of power plants, and mitigate engineering risks.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering technology and relates to a marine photovoltaic anti-icing device, supporting structure and photovoltaic system in ice-covered areas. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] The ocean is rich in solar resources, and offshore photovoltaic power stations have overcome the drawback of traditional photovoltaic power stations' large land resource requirements, leading to their rapid development. However, some sea areas experience winters lasting 3-4 months, causing some seawater to freeze. The floating ice drifting in the sea can compress and collide with the pile foundations of offshore photovoltaic systems, causing the structure to exhibit complex and sensitive dynamic response behavior. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an anti-icing device, supporting structure, and photovoltaic system for offshore photovoltaic systems in ice-covered areas. This invention can improve the service life of pile foundations, reduce subsequent operation and maintenance costs of power plants, and mitigate engineering risks.

[0005] According to some embodiments, the present invention adopts the following technical solution:

[0006] A marine photovoltaic anti-icing device for ice-covered areas includes a concentric inner protective layer and an outer protective layer, with an energy-absorbing layer filling the space between the inner and outer protective layers.

[0007] The energy-absorbing layer includes several layers of energy-absorbing mechanism arrays, with the energy-absorbing mechanisms of each layer arranged circumferentially.

[0008] The energy-absorbing mechanism is a frame structure with a certain degree of elasticity.

[0009] As an alternative implementation, the energy-absorbing mechanism has a centrally symmetrical structure.

[0010] As an alternative implementation, the energy absorption mechanism includes a horizontal connecting beam distributed circumferentially, longitudinal constraint beams disposed on both sides of the horizontal connecting beam, a transverse constraint beam connecting the two ends of the longitudinal constraint beam on the same side, and a longitudinal connecting beam disposed in the middle of the transverse constraint beam and connecting the sidewall of the inner protective layer or the outer protective layer.

[0011] As a further step, the transverse restraint beam comprises two segments connected together, with each segment having its two ends connected to one side of the longitudinal restraint beam and a longitudinal connecting beam near that side.

[0012] As a further step, the longitudinal connecting beam and the longitudinal restraint beam are arranged horizontally and are both arranged perpendicular to the horizontal connecting beam.

[0013] As an alternative implementation, each layer of the energy-absorbing mechanism array includes the same number of energy-absorbing mechanisms, and the energy-absorbing mechanisms in each layer are arranged in the same position.

[0014] As an alternative implementation, the energy-absorbing mechanisms in different layers are arranged alternately.

[0015] A support structure includes a pile foundation, an ice-resistant photovoltaic device for marine ice-covered areas mounted on the pile foundation, and a limiting device mounted on the pile foundation and located above and below the ice-resistant device.

[0016] As an alternative implementation, the upper limiting device is set at a height greater than the highest tide level, and the lower limiting device is set at a height lower than the lowest tide level.

[0017] A photovoltaic system includes the aforementioned anti-icing device or support structure.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The anti-icing device provided by this invention is lightweight, has high energy absorption, and negative stiffness. It can convert and absorb the energy of sea ice pile foundations, reduce the impact of shear force on the pile foundation, and at the same time, the structure has a certain buoyancy, which can adapt to changes in seawater level, dynamically adjust its position, reduce the number of piles, and reduce costs.

[0020] The supporting structure of this invention features a limiting device on its pile body, which can be used in conjunction with an anti-icing device. This device not only provides support for the photovoltaic panels but also limits the vertical displacement of the anti-icing device under tidal fluctuations, ensuring it remains within a certain positional range. Through the anti-icing device and supporting structure, damage to the structure from sea ice can be reduced, safety risks lowered, and favorable conditions provided for the operation of the photovoltaic power station. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 This is a schematic diagram of the energy absorption device in this embodiment;

[0023] Figure 2 This is a cross-sectional view of the energy absorption device in this embodiment;

[0024] Figure 3 This is a structural diagram of the energy absorption mechanism in this embodiment;

[0025] Figure 4 This is a longitudinal sectional view of the energy-absorbing mechanism in this embodiment;

[0026] Figure 5This is a cross-sectional view of the energy-absorbing mechanism in this embodiment;

[0027] Figure 6 This is a multi-layer layout diagram of the energy absorption mechanism in this embodiment;

[0028] Figure 7 This is a structural diagram of the limiting device in this embodiment;

[0029] Figure 8 This is a diagram showing the installation structure of the limiting device in this embodiment;

[0030] Figure 9 This is a rendering of the photovoltaic system in this embodiment;

[0031] The components include: 1. Pile foundation; 2. Limiting device; 3. Anti-icing device; 4. Outer protective layer; 5. Energy-absorbing layer, used to absorb the energy of ice floes impacting the surface; 6. Inner protective layer; 7. Connecting bolts; 8. Longitudinal connecting beam; 9. Transverse restraint beam; 10. Longitudinal restraint beam; 11. Horizontal connecting beam. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Example 1

[0036] A type of marine photovoltaic anti-icing device for ice-covered areas, such as Figure 1 As shown, the anti-icing device 3 includes an outer protective layer 4, an energy-absorbing layer 5, and an inner protective layer 6.

[0037] like Figure 2 As shown, in this embodiment, the outer protective layer 4 and the inner protective layer 6 are made of high-density polyethylene material and are connected to each other to form a closed space to provide buoyancy for the anti-icing device 3, so that it slides up and down along the outside of the pile foundation and always floats on the sea surface. At the same time, it shields the energy-absorbing layer 5 from seawater immersion and improves the corrosive environment.

[0038] The energy-absorbing layer 5 adopts a simple honeycomb structure to absorb the energy of the floating ice pile foundation. It is made of viscoelastic epoxy resin. The energy-absorbing layer 5 consists of multiple layers, each of which includes multiple circumferentially distributed energy-absorbing mechanisms.

[0039] like Figure 3 As shown, the energy absorption mechanism includes a longitudinal connecting beam 8, a transverse restraint beam 9, a longitudinal restraint beam 10, and a horizontal connecting beam 11, making the entire structure a single unit. The horizontal connecting beam 11 is located at the center, with the longitudinal connecting beams 8 distributed on both sides of it as the axis of symmetry. Both ends of the horizontal connecting beam 11 are connected to a longitudinal restraint beam 10, and each end of the longitudinal restraint beam 10 is connected to the longitudinal connecting beam 8 closest to that end through the transverse restraint beam 9.

[0040] The outer protective layer 4 and the inner protective layer 6 are made of hard materials with high stiffness, while the energy-absorbing layer 5 is made of viscoelastic material, which is soft and has low stiffness. The combination of the two materials creates a negative stiffness structure. When the external load is small, the protective layers resist the ice load. When the load is large, the energy-absorbing layer plays its role, which has elastic buckling function and can withstand the large load, while absorbing the impact energy of the ice load on the pile foundation.

[0041] In this embodiment, the anti-icing device is lightweight, has high energy absorption, and negative stiffness, enabling it to convert and absorb the energy of the sea ice pile foundation, thus reducing the impact of shear force on the pile foundation. The foundation structure is equipped with a limiting ring, which restricts the movement of the anti-icing device within a certain height difference range, avoiding large-scale deployment along the foundation structure and reducing costs.

[0042] Furthermore, the anti-icing device has a certain buoyancy, slides along the foundation pile, and always floats on the sea surface, adapting to changes in sea level and dynamically adjusting its position.

[0043] like Figure 4 , Figure 6 As shown, the energy-absorbing mechanisms of the energy-absorbing layer 5 can be arranged in an array, that is, the energy-absorbing mechanisms at the same position in different layers are located in the same column.

[0044] Of course, in other embodiments, the energy absorption mechanisms of different layers can be arranged alternately.

[0045] Example 2

[0046] A support structure, such as Figure 7 As shown, it includes a pile foundation 1, a limiting device 2, and an anti-icing device 3.

[0047] Among them, the pile foundation 1 can use PHC pipe piles or steel pipe piles, and a platform is set on the top of the pile to place photovoltaic modules, etc.; embedded parts are set in the pile body to install the limiting device 2.

[0048] The limiting device 2 consists of an upper limiting ring and a lower limiting ring. The position of the limiting rings is determined according to the hydrological conditions of the project. The upper limiting ring is positioned above the highest tide level, and the lower limiting ring is positioned below the lowest tide level. This limits the vertical movement of the anti-icing device, keeping it within the range of wave and tide differences. In this embodiment, the limiting rings can be made of rubber or PE (polyethylene).

[0049] like Figure 8 As shown, connecting bolt 7 is provided for connecting the limiting ring to the pile foundation 1.

[0050] The anti-icing device 3 is located between the upper and lower limit rings.

[0051] Of course, in other embodiments, the above materials can be replaced with other materials.

[0052] By combining the three structural components, the shearing and impact damage of sea ice on pile foundations can be reduced, the ice resistance of pile foundations can be improved, and the process is economical, reasonable, and easy to construct.

[0053] Example 3

[0054] Photovoltaic systems, such as Figure 9 As shown, it includes the aforementioned support structure or anti-icing device.

[0055] The photovoltaic system in this embodiment, through its anti-icing device and supporting structure, can reduce the damage to the structure caused by sea ice, lower safety risks, and provide favorable conditions for the operation of the photovoltaic power station.

[0056] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A photovoltaic support structure for offshore ice-covered areas, characterized in that, It includes a pile foundation, a limiting device, and an anti-icing device. The anti-icing device includes a concentric inner protective layer and an outer protective layer, with an energy-absorbing layer filling the space between the inner and outer protective layers. The energy-absorbing layer uses a simple honeycomb structure to absorb the energy of the floating ice pile foundation; The energy-absorbing layer includes several layers of energy-absorbing mechanism arrays, with each layer's energy-absorbing mechanism arranged circumferentially. The energy-absorbing mechanism includes longitudinal connecting beams, transverse constraint beams, longitudinal constraint beams, and horizontal connecting beams, making the entire structure a single unit. The horizontal connecting beam is located at the center, with the longitudinal connecting beams distributed on both sides of it as the axis of symmetry. Both ends of the horizontal connecting beam are connected to a longitudinal constraint beam, and each end of the longitudinal constraint beam is connected to the longitudinal connecting beam closest to that end through a transverse constraint beam. The energy-absorbing mechanism is a frame structure with a certain degree of elasticity; The outer and inner protective layers are made of hard materials with high stiffness, while the energy-absorbing layer is made of viscoelastic material with softness and low stiffness. The combination of the two materials creates a negative stiffness structure. The limiting device consists of an upper limiting ring and a lower limiting ring, and is fitted onto the pile foundation. The position of the limiting ring is determined according to the hydrological conditions of the project. The elevation of the upper limiting ring is higher than the highest tide level, and the elevation of the lower limiting ring is lower than the lowest tide level. A platform is set on the top of the pile to place the photovoltaic modules.

2. The offshore photovoltaic support structure in ice-covered areas as described in claim 1, characterized in that, The energy absorption mechanism has a centrally symmetrical structure.

3. The offshore photovoltaic support structure in ice-covered areas as described in claim 1, characterized in that, The transverse restraint beam comprises two segments connected together, with each segment having its two ends connected to one side of the longitudinal restraint beam and a longitudinal connecting beam near that side.

4. The offshore photovoltaic support structure in ice-covered areas as described in claim 1, characterized in that, The longitudinal connecting beam and the longitudinal restraint beam are arranged horizontally and perpendicular to the horizontal connecting beam.

5. The offshore photovoltaic support structure in ice-covered areas as described in claim 1, characterized in that, Each layer of the energy-absorbing mechanism array includes the same number of energy-absorbing mechanisms, and the energy-absorbing mechanisms in each layer are arranged in the same position.

6. The offshore photovoltaic support structure in ice-covered areas as described in claim 1, characterized in that, The energy-absorbing mechanisms in different layers are arranged in an alternating pattern.

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