Thin film type floating photovoltaic device and aquaculture net cage

Abstract

The utility model discloses a thin film type floating photovoltaic device and an aquaculture net cage, and relates to the technical field of water photovoltaic power generation, the thin film type floating photovoltaic device comprises a thin film, an inner buoyancy ring and an outer buoyancy ring; a plurality of photovoltaic panels are arranged on the upper surface of the thin film; the inner buoyancy ring is connected with the inner circumference of the film; a first lifting assembly is arranged at the top of the outer buoyancy ring and connected with the periphery of the thin film. The first lifting assembly is used for driving the periphery of the film to move in the first direction so that the periphery of the film can be higher than the inner periphery of the film. The first lifting assembly is arranged on the outer buoyancy ring, the first lifting assembly is used for driving the film to move in the first direction, the outer periphery of the film is higher than the inner periphery of the film, the inclined face is formed, and therefore water accumulated on the film can be drained away along the inclined face, and the drainage effect is achieved; therefore, the problem that a thin film type floating photovoltaic device arranged in an open sea area is easy to damage and sink to the bottom due to the problems of seawater upwaves, water irrigation and the like is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation on water, in particular to a thin-film floating photovoltaic device and a breeding cage. Background Art

[0002] Photovoltaic solar power generation accounts for a considerable proportion of the clean and renewable energy industry in terms of both new installed capacity and total installed capacity each year. However, the development of land-based photovoltaics has become complete, and rising land prices have also prompted the development of photovoltaics on the water surface. However, due to the limitations of current technology and the harsh environmental load conditions of the ocean, the current water-based photovoltaics are still mainly freshwater floating photovoltaics and offshore fixed photovoltaics. The development of photovoltaics in the deep sea faces many problems.

[0003] On October 31, 2022, the Shandong Peninsula South No. 3 offshore wind farm 20MW deep-sea floating photovoltaic 500kW demonstration project successfully completed power generation, becoming the first deep-sea wind and solar floating photovoltaic demonstration project. At the same time, the floating photovoltaic project adopted the most advanced thin-film floating photovoltaic technology. However, less than half a year later, the floating photovoltaic structure sank to the bottom due to waves and water problems.

[0004] Therefore, a new type of floating photovoltaic structure is urgently needed to solve the problem that existing floating photovoltaic structures are easily sunk to the bottom due to seawater accumulation on the surface. Utility Model Content

[0005] The main purpose of the utility model is to provide a thin-film floating photovoltaic device and aquaculture cage, aiming to solve the problem that the existing floating photovoltaic structure is easy to sink to the bottom due to seawater accumulation on the surface.

[0006] To achieve the above-mentioned purpose, the utility model proposes a thin-film floating photovoltaic device, including a thin film, an inner buoyancy ring and an outer buoyancy ring; the thin film is in a closed loop, and a plurality of photovoltaic panels are arranged on the upper surface of the thin film; the inner buoyancy ring is connected to the inner periphery of the thin film; a first lifting assembly is arranged on the top of the outer buoyancy ring, and the first lifting assembly is connected to the outer periphery of the thin film; the first lifting assembly is used to drive the outer periphery of the thin film to move along a first direction so that the outer periphery of the thin film is higher than the inner periphery of the thin film.

[0007] In one embodiment, the thin-film floating photovoltaic device includes at least three first lifting assemblies, and the at least three first lifting assemblies are evenly arranged along the circumference of the outer buoyancy ring.

[0008] In one embodiment, the thin-film floating photovoltaic device further comprises a guardrail, which is in a closed loop shape, the outer periphery of the thin film is connected to the guardrail, and the bottom of the guardrail is connected to the top of the first lifting assembly.

[0009] In one embodiment, the outer periphery of the inner buoyancy ring is connected to the inner periphery of the membrane; the outer periphery of the inner buoyancy ring is provided with a plurality of drainage channels, one end of the drainage channel is located above the connection between the membrane and the inner buoyancy ring, and the other end of the drainage channel is located below the connection.

[0010] In one embodiment, the thin-film floating photovoltaic device further comprises an anchoring structure, one end of the anchoring structure is connected to the outer buoyancy ring, and the other end of the anchoring structure is used for anchoring on the seabed.

[0011] In one embodiment, ballast tanks are provided inside the outer buoyancy ring and inside the inner buoyancy ring; injection and discharge channels are provided outside the outer buoyancy ring and outside the inner buoyancy ring, and the injection and discharge channels are connected to the ballast tanks; the thin-film floating photovoltaic device also includes a ballast assembly, which is arranged in the ballast tank; the ballast assembly is used to inject external water into the ballast tank through the injection and discharge channels to increase the mass of the outer buoyancy ring and the inner buoyancy ring; and the ballast assembly is used to discharge water in the ballast tank to the outside through the injection and discharge channels to reduce the mass of the outer buoyancy ring and the inner buoyancy ring.

[0012] In one embodiment, a second lifting assembly is provided on the top of the inner buoyancy ring, and the top of the second lifting assembly is connected to the inner circumference of the film; the second lifting assembly is used to drive the inner circumference of the film to move along the second direction so that the inner circumference of the film is higher than the outer circumference of the film.

[0013] In one embodiment, the first lifting assembly is configured as a hydraulic lifting device.

[0014] The utility model also provides a breeding cage, comprising a cage body and the above-mentioned thin-film floating photovoltaic device, the top of the cage body is in a closed loop; the bottom of the outer buoyancy ring in the thin-film floating photovoltaic device is connected to the top of the cage body.

[0015] In one embodiment, an inner layer of mesh is provided on the inner periphery of the inner buoyancy ring; the cage body includes a connecting portion and an outer layer of mesh, the connecting portion is in a closed loop, the top of the connecting portion is connected to the bottom of the outer buoyancy ring, and the bottom of the connecting portion is connected to the top of the outer layer of mesh; the first lifting assembly is also used to drive the outer periphery of the film to move along the second direction so that the outer periphery of the film fits with the outer buoyancy ring; the second direction is opposite to the first direction; when the outer periphery of the film fits with the outer buoyancy ring, the outer layer of mesh, the film and the inner layer of mesh enclose to form a closed breeding area.

[0016] The technical solution of the utility model adopts a thin-film floating photovoltaic device, including a thin film, an inner buoyancy ring and an outer buoyancy ring; the thin film is in a closed loop, and a plurality of photovoltaic panels are arranged on the upper surface of the thin film; the inner buoyancy ring is connected to the inner periphery of the thin film; a first lifting assembly is arranged on the top of the outer buoyancy ring, and the first lifting assembly is connected to the outer periphery of the thin film; the first lifting assembly is used to drive the outer periphery of the thin film to move along the first direction, so that the outer periphery of the thin film is higher than the inner periphery of the thin film. The utility model is provided with a first lifting assembly on the outer buoyancy ring, and the first lifting assembly is used to drive the thin film to move along the first direction, so that the outer periphery of the thin film is higher than the inner periphery and forms an inclined surface; when there are too many waves, flooding or rainwater on the thin film, the first lifting assembly drives the thin film to rise, so that the water accumulated on the thin film can be drained along the inclined surface, achieving a drainage effect, thereby avoiding the problem that the thin-film floating photovoltaic device arranged in the far sea area is easily damaged and sunk to the bottom due to waves, flooding and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A structural schematic diagram of an embodiment of a breeding cage provided by the utility model;

[0019] Figure 2 A schematic diagram of the lifting of the first lifting assembly of an embodiment of a breeding cage provided by the utility model;

[0020] Figure 3 A schematic diagram of the lifting of the first lifting assembly of another embodiment of the aquaculture cage provided by the utility model;

[0021] Figure 4 A cross-sectional view of an embodiment of a breeding cage provided by the utility model;

[0022] Figure 5 A partial enlarged view of an embodiment of a thin-film floating photovoltaic device provided by the utility model;

[0023] Figure 6 This is a schematic diagram of the descent of the first lifting component of an embodiment of a breeding cage provided by the utility model.

[0024] Description of Figure Numbers:

[0025] 1. Thin-film floating photovoltaic device; 11. Thin film; 111. Photovoltaic panel; 12. Inner buoyancy ring; 121. Drainage channel; 122. Inner net; 13. Outer buoyancy ring; 131. First lifting assembly; 14. Guardrail; 2. Net box body; 21. Outer net.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] Photovoltaic solar power generation accounts for a considerable proportion of the clean and renewable energy industry in terms of both new installed capacity and total installed capacity each year. However, the development of onshore photovoltaics has become complete, and rising land prices have also prompted photovoltaics to develop on the water surface. However, limited by current technology and the harsh environmental load conditions of the ocean, water photovoltaics are still mainly freshwater floating photovoltaics and offshore fixed types. Photovoltaic development to the deep sea faces many problems. On October 31, 2022, the Shandong Peninsula South No. 3 Offshore Wind Farm 20MW Deep-sea Floating Photovoltaic 500kW Demonstration Project successfully completed power generation, becoming the first deep-sea wind and solar co-field floating photovoltaic demonstration project. At the same time, the floating photovoltaic project uses relatively cutting-edge thin-film floating photovoltaic technology. However, in less than half a year, the floating photovoltaic structure is suspected to have sunk to the bottom of the thin film structure due to wave and water problems.

[0031] Therefore, a new type of floating photovoltaic structure is urgently needed to solve the problem that existing floating photovoltaic structures are easily sunk to the bottom due to seawater accumulation on the surface.

[0032] In order to solve the above problems, the utility model proposes a thin-film floating photovoltaic device.

[0033] See also Figure 1 , Figure 2 and Figure 3 In one embodiment of the utility model, the thin-film floating photovoltaic device 1 includes a thin film 11, an inner buoyancy ring 12 and an outer buoyancy ring 13; the thin film 11 is in a closed loop, and a plurality of photovoltaic panels 111 are arranged on the upper surface of the thin film 11; the inner buoyancy ring 12 is connected to the inner periphery of the thin film 11; a first lifting assembly 131 is arranged on the top of the outer buoyancy ring 13, and the first lifting assembly 131 is connected to the outer periphery of the thin film 11; the first lifting assembly 131 is used to drive the outer periphery of the thin film 11 to move along the first direction, so that the outer periphery of the thin film 11 is higher than the inner periphery of the thin film 11.

[0034] The technical solution of the utility model is to provide a first lifting component 131 on the outer buoyancy ring 13, and use the first lifting component 131 to drive the film 11 to move along the first direction, so that the outer periphery of the film 11 is higher than the inner periphery and an inclined surface is formed; when there is too much sea wave, water or rainwater accumulation on the film 11, the first lifting component 131 drives the film 11 to rise, so that the water accumulated on the film 11 can be discharged along the inclined surface to achieve a drainage effect, thereby avoiding the problem that the thin-film floating photovoltaic device 1 arranged in the far sea area is easily damaged and sunk to the bottom due to sea wave, water and other problems.

[0035] It should be noted that the first direction is a direction having an upward component in the vertical direction, which can be an upward direction along the vertical direction or an oblique upward direction. The present application does not make specific restrictions on the orientation of the first direction, as long as the condition that the film 11 can move along the first direction to achieve that the outer periphery of the film 11 is higher than the inner periphery of the film 11 is met.

[0036] In addition, there may be only one photovoltaic panel 111 or multiple photovoltaic panels 111 on the film 11; when there are multiple photovoltaic panels 111 on the film 11, the multiple photovoltaic panels 111 may be evenly arranged on the surface of the film 11, or may be adjusted according to actual conditions and needs. For example, according to the different lighting conditions in sea areas at different longitudes and latitudes, the arrangement of the photovoltaic panels 111 may be adjusted accordingly.

[0037] The film 11 is in a closed loop shape, and the specific shapes of the inner and outer peripheries of the film 11 can be one of a variety of shapes such as a circle, a rectangle, an irregular shape, etc. Correspondingly, the inner buoyancy ring 12 and the outer buoyancy ring 13 can adopt the same or similar shapes according to the shape of the film 11. As a preferred embodiment, the inner and outer peripheries of the film 11 are in annular shapes. Compared with other shapes, the annular film 11 can distribute stress more evenly, reduce stress concentration, improve durability, and have better crack resistance when subjected to the impact of waves.

[0038] When there are fewer first lifting components 131, it is difficult for the first lifting components 131 to lift the entire periphery of the membrane 11 relative to the outer buoyancy ring 13. Only a local area of ​​the periphery of the membrane 11 is lifted, which makes it difficult to drain the accumulated water on the membrane 11. Figure 1 and Figure 3 The thin-film floating photovoltaic device 1 includes at least three first lifting assemblies 131, and at least three first lifting assemblies 131 are evenly arranged along the circumference of the outer buoyancy ring 13. In this way, at least three first lifting assemblies 131 are in contact with the outer periphery of the film 11 and at least three first lifting assemblies 131 are evenly distributed with each other, so that all parts of the outer periphery of the film 11 are lifted by the first lifting assemblies 131, so that the outer periphery of the film 11 as a whole rises relative to the outer buoyancy ring 13, which is conducive to draining the accumulated water from all parts of the film 11. Specifically, as an optional embodiment, the number of first lifting assemblies 131 can be set to 10, and the 10 first lifting assemblies 131 are evenly arranged along the circumference of the outer buoyancy ring 13, which can ensure that all parts of the outer periphery of the film 11 are lifted by the first lifting assemblies 131, while greatly reducing the load that each first lifting assembly 131 needs to bear during the lifting process, so as to avoid a single first lifting assembly 131 from being damaged by excessive load.

[0039] In addition, when the film 11 is driven by the first lifting assembly 131, only part of the area involved in the connection is stressed. When the film 11 needs to be lifted, a certain amount of seawater has accumulated on the film 11, which will cause the surface of the film 11 to bear a large load. Since the film 11 is relatively thin, only a few joints between the film 11 and the first lifting assembly 131 are stressed and drive the film 11 to rise, which will cause a large local stress to be generated at the connection of the periphery of the film 11, which may cause damage to the film 11. In order to avoid the problem of damage to the film 11 during the lifting process, in the embodiment of the utility model, please refer to Figure 1 and Figure 4 The thin-film floating photovoltaic device 1 also includes a guardrail 14, which is in a closed loop shape. The periphery of the film 11 is connected to the guardrail 14, and the bottom of the guardrail 14 is connected to the top of the first lifting assembly 131. In this way, by connecting the periphery of the film 11 as a whole to the closed-loop guardrail 14, the area of ​​the peripheral connection of the film 11 is greatly increased, thereby preventing the film 11 from being damaged due to excessive stress in a local area. In addition, as a rigid structure, the guardrail 14 has a predetermined height between the guardrail 14 and the outer buoyancy ring 13 under normal working conditions. Therefore, the guardrail 14 can also provide support and protection for the operation and maintenance personnel to land on the film 11 to perform related operation and maintenance work. It should be noted that there are multiple connection methods between the film 11 and the guardrail 14, and the connection method between the film 11 and the guardrail 14 is not limited in this embodiment. Exemplarily, the outer periphery of the film 11 can be wrapped around the guardrail 14 and fixed by bonding; or a groove can be provided on the inner periphery of the guardrail 14, and the outer periphery of the film 11 can be embedded in the groove and fixed with a special retaining spring or fastener, so that the film 11 is evenly and firmly clamped.

[0040] Since the inner buoyancy ring 12 has a certain height, the outer periphery of the membrane 11 rises, causing part of the seawater to accumulate between the inclined membrane 11 and the water groove formed by the side wall of the inner buoyancy ring 12. In order to solve the problem that the accumulated water between the inclined membrane 11 and the side wall of the inner buoyancy ring 12 is difficult to drain, in the embodiment of the utility model, please refer to Figure 1 , Figure 4 and Figure 5 , the outer periphery of the inner buoyancy ring 12 is connected to the inner periphery of the film 11; the outer periphery of the inner buoyancy ring 12 is provided with a plurality of drainage channels 121, one end of the drainage channel 121 is located above the connection between the film 11 and the inner buoyancy ring 12, and the other end of the drainage channel 121 is located below the connection. In this way, by providing a plurality of drainage channels 121 on the inner buoyancy ring 12, the accumulated water between the film 11 and the side wall of the inner buoyancy ring 12 can flow into the drainage channels 121 and flow to the external seawater, thereby preventing a small amount of seawater from accumulating on the film 11 for a long time and affecting the service life of the film 11 and the power generation efficiency of the photovoltaic panel 111.

[0041] In order to solve the problem of how to prevent the thin-film floating photovoltaic device 1 from moving due to the impact of sea waves, resulting in deviation from the original position, in an embodiment of the utility model, the thin-film floating photovoltaic device 1 also includes an anchoring structure (not shown in the figure), one end of the anchoring structure is connected to the outer buoyancy ring 13, and the other end of the anchoring structure is used to anchor on the seabed. In this way, after the thin-film floating photovoltaic device 1 is anchored by the anchoring structure, the thin-film floating photovoltaic device 1 will only move to a certain extent within a predetermined range, avoiding the problem that the thin-film floating photovoltaic device 1 cannot be found after excessively deviating from the original position. Specifically, as an optional embodiment, the anchoring structure may include components such as anchor cables, anchor heads, tension adjustment devices, limiters, and buffer components to achieve effects such as anchoring, tension adjustment, floating range adjustment, and buffering of wave impact.

[0042] In order to solve the problem of how to protect the thin-film floating photovoltaic device 1 from damage when encountering extremely severe conditions, such as typhoons and extreme winds and waves, in an embodiment of the utility model, ballast tanks are provided inside the outer buoyancy ring 13 and inside the inner buoyancy ring 12; injection and discharge channels are provided outside the outer buoyancy ring 13 and outside the inner buoyancy ring 12, and the injection and discharge channels are connected to the ballast tanks; the thin-film floating photovoltaic device 1 also includes a ballast assembly, which is arranged in the ballast tank; the ballast assembly is used to inject external water into the ballast tank through the injection and discharge channels to increase the mass of the outer buoyancy ring 13 and the inner buoyancy ring 12; and the ballast assembly is used to discharge the water in the ballast tank to the outside through the injection and discharge channels to reduce the mass of the outer buoyancy ring 13 and the inner buoyancy ring 12. In this way, by using the ballast assembly to inject water into the outer buoyancy ring 13 and the inner buoyancy ring 12, the thin-film floating photovoltaic device 1 can be submerged below the sea level, which can effectively avoid serious damage to the thin-film floating photovoltaic device 1 caused by extreme wind and wave loads and attacks, thereby ensuring the safety of the overall structure of the thin-film floating photovoltaic device 1 and improving the risk resistance of the thin-film floating photovoltaic device 1. When extreme environments such as typhoons and extreme winds and waves disappear, the ballast assembly can discharge the water in the ballast tank to the outside through the injection and discharge channel, so that the thin-film floating photovoltaic device 1 floats above the sea level again and continues to generate photovoltaic power.

[0043] In order to solve the problem that the film 11 cannot rise normally when the first lifting assembly 131 fails, in the embodiment of the utility model, a second lifting assembly (not shown in the figure) is provided on the top of the inner buoyancy ring 12, and the top of the second lifting assembly is connected to the inner periphery of the film 11; the second lifting assembly is used to drive the inner periphery of the film 11 to move along the second direction, so that the inner periphery of the film 11 is higher than the outer periphery of the film 11. In this way, by providing the second lifting assembly on the inner buoyancy ring 12, the second lifting assembly and the first lifting assembly 131 are mutually standby; when the first lifting assembly 131 fails, the second lifting assembly drives the inner periphery of the film 11 to rise, so that the film 11 is tilted, and the drainage effect can also be achieved. It should be noted that the second direction is a direction with an upward component in the vertical direction, which can be an upward direction along the vertical direction or an obliquely upward direction; the second direction and the first direction can be the same direction or different directions. The present application does not make specific restrictions on the direction of the second direction, as long as the film 11 moves along the second direction to achieve the condition that the inner periphery of the film 11 is higher than the outer periphery of the film 11.

[0044] Since the membrane 11 has a large area, and a certain amount of seawater has accumulated on the membrane 11 when it needs to rise for drainage, the first lifting component 131 needs to drive the membrane 11 to rise while bearing a large load, and this requires the first lifting component 131 to be able to provide sufficient power to achieve lifting. In order to solve the problem that the first lifting component 131 needs to provide a large load to bear and it is difficult to achieve the lifting operation, in an embodiment of the utility model, the first lifting component 131 is set as a hydraulic lifting device. In this way, since the hydraulic lifting device has more power, compared with the electric device, the hydraulic system of the hydraulic lifting device can provide greater power with a smaller size and weight, and has higher reliability. Therefore, setting the first lifting component 131 as a hydraulic lifting device can provide sufficient power for the first lifting component 131, so that the first lifting component 131 can drive the periphery of the membrane 11 to lift and achieve the drainage effect.

[0045] Correspondingly, the second lifting assembly can also be set as a hydraulic lifting device, which has similar beneficial effects to those of the first lifting assembly 131 being set as a hydraulic lifting device, that is, the second lifting assembly can drive the inner periphery of the film 11 to lift up to achieve a drainage effect.

[0046] The utility model also proposes a breeding cage, which is used in offshore areas. Since the breeding cage occupies a large space, in order to solve the problem of how to improve the space utilization rate of the breeding cage, please refer to Figure 1The aquaculture cage includes a cage body 2 and the above-mentioned thin-film floating photovoltaic device 1. The specific structure of the thin-film floating photovoltaic device 1 refers to the above-mentioned embodiment. Since the aquaculture cage adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the combination of the cage body 2 and the thin-film floating photovoltaic device 1 in the aquaculture cage makes the aquaculture cage not only used for aquaculture of fish in offshore areas, but also for photovoltaic power generation, thereby improving the space utilization rate per unit area and increasing economic benefits.

[0047] When breeding fish in the cage body 2, although the top of the cage body 2 is connected to the outer buoyancy ring 13 and the outer buoyancy ring 13 floats on the sea level, it can prevent most fish from escaping directly from the top of the cage body 2; however, since the outer buoyancy ring 13 is an annular structure and has no cap, some fish may still jump out of the sea and cross the outer buoyancy ring 13 during the actual breeding process, thereby escaping the cage. In order to solve the problem of how to prevent the fish in the cage body 2 from escaping, in the embodiment of the present utility model, please refer to Figure 1 , Figure 5 and Figure 6 An inner layer of mesh 122 is arranged on the inner periphery of the inner buoyancy ring 12; the cage body 2 includes a connecting portion and an outer layer of mesh 21, the connecting portion is in a closed loop, the top of the connecting portion is connected to the bottom of the outer buoyancy ring 13, and the bottom of the connecting portion is connected to the top of the outer layer of mesh; the first lifting assembly 131 is also used to drive the outer periphery of the film 11 to move along the second direction so that the outer periphery of the film 11 fits with the outer buoyancy ring 13; the second direction is opposite to the first direction; when the outer periphery of the film 11 fits with the outer buoyancy ring 13, the outer layer of mesh, the film 11 and the inner layer of mesh 122 enclose and form a closed breeding area. In this way, the net of the inner buoyancy ring 12 prevents the fish from escaping from the inner periphery of the inner buoyancy ring 12 of the cage body 2; the outer periphery of the film 11 is driven to move along the second direction by the first lifting component 131, so that the film 11 fits with the outer buoyancy ring 13, so that the outer net, the film 11 and the inner net 122 are enclosed to form a closed breeding area, preventing the fish from escaping.

[0048] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A thin-film floating photovoltaic device, characterized in that: include: A film, the film is in a closed loop shape, and a plurality of photovoltaic panels are arranged on the upper surface of the film; An inner buoyancy ring connected to the inner periphery of the film; An outer buoyancy ring, wherein a first lifting assembly is disposed on the top of the outer buoyancy ring, and the first lifting assembly is connected to the outer periphery of the film; the first lifting assembly is used to drive the outer periphery of the film to move along a first direction so that the outer periphery of the film is higher than the inner periphery of the film.

2. The thin-film floating photovoltaic device according to claim 1, characterized in that: The thin-film floating photovoltaic device includes at least three first lifting assemblies, and the at least three first lifting assemblies are evenly arranged along the circumference of the outer buoyancy ring.

3. The thin-film floating photovoltaic device according to claim 2, characterized in that: The thin-film floating photovoltaic device further comprises a guardrail, which is in a closed loop shape, the outer periphery of the thin film is connected to the guardrail, and the bottom of the guardrail is connected to the top of the first lifting assembly.

4. The thin-film floating photovoltaic device according to claim 1, characterized in that: The outer periphery of the inner buoyancy ring is connected to the inner periphery of the film; a plurality of drainage channels are arranged on the outer periphery of the inner buoyancy ring, one end of the drainage channel is located above the connection between the film and the inner buoyancy ring, and the other end of the drainage channel is located below the connection.

5. The thin-film floating photovoltaic device according to claim 1, characterized in that: The thin-film floating photovoltaic device further comprises an anchoring structure, one end of which is connected to the outer buoyancy ring, and the other end of which is used for anchoring on the seabed.

6. The thin-film floating photovoltaic device according to claim 1, characterized in that: The interior of the outer buoyancy ring and the interior of the inner buoyancy ring are both provided with ballast tanks; the exterior of the outer buoyancy ring and the exterior of the inner buoyancy ring are both provided with injection and discharge channels, and the injection and discharge channels are communicated with the ballast tanks; The thin-film floating photovoltaic device also includes a ballast assembly, which is arranged in the ballast tank; the ballast assembly is used to inject external water into the ballast tank through the injection and discharge channel to increase the mass of the outer buoyancy ring and the inner buoyancy ring; and the ballast assembly is used to discharge the water in the ballast tank to the outside through the injection and discharge channel to reduce the mass of the outer buoyancy ring and the inner buoyancy ring.

7. The thin-film floating photovoltaic device according to claim 1, characterized in that: A second lifting assembly is provided on the top of the inner buoyancy ring, and the top of the second lifting assembly is connected to the inner periphery of the film; the second lifting assembly is used to drive the inner periphery of the film to move along the second direction so that the inner periphery of the film is higher than the outer periphery of the film.

8. The thin-film floating photovoltaic device according to any one of claims 1 to 7, characterized in that: The first lifting assembly is configured as a hydraulic lifting device.

9. A breeding cage, characterized in that: include: A net cage body, wherein the top of the net cage body is in a closed loop shape; The thin-film floating photovoltaic device according to any one of claims 1 to 8, wherein the bottom of the outer buoyancy ring in the thin-film floating photovoltaic device is connected to the top of the cage body.

10. The aquaculture cage according to claim 9, characterized in that: An inner layer of mesh is arranged on the inner periphery of the inner buoyancy ring; the net box body comprises a connecting portion and an outer layer of mesh, the connecting portion is in a closed loop shape, the top of the connecting portion is connected to the bottom of the outer buoyancy ring, and the bottom of the connecting portion is connected to the top of the outer layer of mesh; The first lifting assembly is further used to drive the outer periphery of the film to move along a second direction so that the outer periphery of the film fits with the outer buoyancy ring; the second direction is opposite to the first direction; When the outer periphery of the film is in contact with the outer buoyancy ring, the outer layer of the net, the film and the inner layer of the net are combined to form a closed breeding area.

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