Offshore floating photovoltaic support structure

Abstract

The offshore floating photovoltaic support structure of the present invention includes a first floating body. The outer periphery of the first floating body is connected to a first annular outer ring through a bearing. A circular inner ring is arranged directly below the first floating body. The first annular outer ring is connected to the circular inner ring through a plurality of stay cables. Multiple annular segments are arranged in a staggered manner between the plurality of stay cables. The structure also includes a plurality of transverse connecting rods passing through the annular segments. Both ends of the transverse connecting rods are respectively connected to a wave-receiving disc. The outer periphery of the circular inner ring is connected to a second annular outer ring through a bearing. The tendency of the support mechanism to twist caused by the action of waves and sea breeze is converted into the relative rotational friction energy consumption between the annular segments and the stay cables, effectively reducing the influence of the horizontal action of waves and sea breeze on the first floating body. The second floating body directly resists the impact of part of the waves in the vertical direction, and can also drive the friction energy consumption between the annular segments and the stay cables during its own impact process, thereby solving the problem that the floating body is prone to large position offsets due to the influence of waves.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic brackets, and particularly relates to a floating photovoltaic bracket structure for the sea. Background Art

[0002] Offshore photovoltaic brackets are divided into fixed type and floating type. Among them, the floating photovoltaic bracket is mainly applied to non-coastal and non-shallow sea areas, which can avoid the characteristic of traditional land photovoltaics occupying land resources. And there is no obstruction at sea, and the photovoltaic panels are exposed to sunlight for a long time, making the floating photovoltaic bracket for the sea have a very broad application prospect and can strongly support the development of China's new energy industry.

[0003] During the use of offshore photovoltaic brackets, they will be in a state of composite stress deformation, mainly composed of up-and-down vibration deformation - horizontal vibration deformation - overall torsional deformation. Therefore, the dynamic research on the overall mechanical model of offshore photovoltaic brackets is also one of the key research works for such components. The current research on new offshore photovoltaic brackets in China is relatively weak. At present, offshore photovoltaic brackets mainly consist of a floating body structure, a mooring and anchoring structure. Among them, the upper part of the floating body structure is used to lay or connect photovoltaic panels, and the lower part of the floating body structure is directly connected to the anchoring part through mooring. This simple structural form makes the floating body structure have weak energy consumption ability in the process of resisting waves, that is, the floating body is prone to large position offsets under the influence of waves. In this process, it is easy to cause hidden cracks in the photovoltaic panels and the floating body, greatly weakening the power generation of photovoltaic power generation. Summary of the Invention

[0004] The purpose of the present invention is to provide a floating photovoltaic bracket structure for the sea, which solves the problem of hidden cracks in photovoltaic panels and floating bodies caused by the influence of waves on offshore photovoltaics.

[0005] The technical solution adopted by the present invention is that a floating photovoltaic bracket structure for the sea includes a first floating body for supporting a flat photovoltaic panel. The outer circumference of the first floating body is connected to a first annular outer ring through a bearing. A ring inner circle is arranged directly below the first floating body. The first annular outer ring is connected to the ring inner circle through a plurality of stay cables. A plurality of annular segments are arranged in a staggered manner between the plurality of stay cables. The plurality of stay cables and the plurality of annular segments form a braided structure. It also includes a plurality of transverse connecting rods passing through the annular segments. Both ends of each transverse connecting rod are respectively connected to a wave-receiving disc. The outer circumference of the ring inner circle is connected to a second annular outer ring through a bearing.

[0006] The particularity of the present invention also lies in that:

[0007] A second floating body is inserted through the middle of each transverse connecting rod and is located directly below the first floating body.

[0008] The parts of the plurality of transverse connecting rods located outside the annular segments are connected by a rubber series belt.

[0009] Both the stay cable and the annular segment structures are composed of an alloy support body coated with a friction-resistant rubber material.

[0010] Each stay cable segment is connected to the first annular outer ring and the annular inner ring through end connectors.

[0011] The end connector includes a bottom plate, two vertical plates are connected to the bottom plate, the stay cable segment is connected between the two vertical plates, and further includes a bolt passing through the two vertical plates, and is connected to the first annular outer ring and the annular inner ring through the bolt.

[0012] The transverse connecting rod and the annular segment are connected through a fitting.

[0013] The fitting includes two side plates, two connecting plates are connected between the two side plates, the annular segment is composed of two semi-circular ring structures, the two semi-circular ring structures are connected between the two side plates, and are fixed by bolt connection, and the transverse connecting rod vertically passes through the two side plates.

[0014] A plurality of mooring cables are circumferentially connected to the outer periphery of the second annular outer ring, and the other ends of the mooring cables are fixedly connected to the pile foundation through anchor fittings.

[0015] A plurality of support columns are connected to the upper surface of the first annular outer ring in a circular array, and an inclined photovoltaic panel is connected to each support column.

[0016] The beneficial effects of the present invention are:

[0017] For the offshore floating photovoltaic support structure of the present invention, the tendency of the support mechanism to twist caused by the action of waves and sea breeze is converted into the relative rotational friction energy consumption between the annular segment and the stay cable segment, which can effectively reduce the influence of the horizontal action of waves and sea breeze on the first floating body; and in addition to directly resisting the impact of part of the waves in the vertical direction, the second floating body can avoid the direct large-area impact of sea waves on the first floating body. The second floating body can further drive the friction energy consumption between the annular segment and the stay cable segment during the process of being impacted by itself, thereby solving the problem that the floating body is prone to large position offset under the influence of waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the offshore floating photovoltaic support structure of the present invention;

[0019] Figure 2 is another schematic structural diagram of the offshore floating photovoltaic support structure of the present invention;

[0020] Figure 3 is a schematic structural diagram of the energy consumption area in the middle of the offshore floating photovoltaic support structure of the present invention;

[0021] Figure 4 is a top view of the energy consumption area in the middle of the offshore floating photovoltaic support structure of the present invention;

[0022] Figure 5 is a schematic diagram of the positional relationship between the stay cable segment and the annular segment in the structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the embedded parts connecting the annular segments in the structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the fixed seat connected to the inclined section in the structure of the present invention.

[0025] In the figure: 1. support column, 2. oblique photovoltaic panel, 3. first floating body, 4. first annular outer ring, 5. flat photovoltaic panel, 6. mooring cable, 7. second annular outer ring, 8. annular inner ring, 91. diagonal section, 911. bottom plate, 912. vertical plate, 92. annular section, 93. transverse connecting rod, 94. second floating body, 95. fitting, 951. side plate, 952. connecting plate, 10. wave-bearing disc, 11. rubber series belt. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The offshore floating photovoltaic support structure of the present invention is as follows: Figure 1 , Figure 2 , Figure 3 As shown, it includes a first floating body 3 for supporting a flat photovoltaic panel 5, the outer periphery of the first floating body 3 is connected to a first annular outer ring 4 through a bearing, an annular inner ring 8 is arranged directly below the first floating body 3, the first annular outer ring 4 is connected to the annular inner ring 8 through a plurality of inclined sections 91, and the plurality of inclined sections 91 are arranged in a circular ring. The annular inner ring 8 is a steel product, reinforced concrete, or a reinforced concrete jacket steel plate structure, and its function is to have a large mass so that the plurality of inclined sections 91 between the annular inner ring 8 and the first annular outer ring 4 are straightened, as shown in FIG. Figure 4 , Figure 5 As shown, multiple layers of annular segments 92 are alternately arranged between multiple oblique segments 91, and multiple oblique segments 91 and multiple layers of annular segments 92 form a braided structure, which has strong integrity and light weight, and when the first annular outer ring 4 rotates, the oblique segments 91 have the same rotation trend, and the water obstruction area is small; Figure 3 As shown, it also includes multiple transverse connecting rods 93 passing through the annular segment 92, and the two ends of the transverse connecting rods 93 are respectively connected to a wave-bearing disc 10. The outer periphery of the annular inner ring 8 is connected to the second annular outer ring 7 through a large-diameter bearing or flange and a bearing transition. The outer diameter of the annular inner ring 8 is smaller than the outer diameter of the first annular outer ring 4.

[0028] The overall structure of the multiple inclined sections 91 used is in the shape of an inverted truncated cone, that is, the end with the smaller top surface faces downward.

[0029] During installation, attention should be paid to the layout of the stay cable section 91 and the annular section 92, so that the stay cable section 91 and the annular section 92 can smoothly and repeatedly rub and consume energy, and at the same time, it can ensure that the braided structure composed of the stay cable section 91 and the annular section 92 has strong energy consumption ability.

[0030] There are two relatively large gaps left between multiple stay cable sections 91. The sizes of these two gaps are the same and meet the rotation amplitude of the transverse connecting rod 93.

[0031] The lengths of the multi-layer transverse connecting rods 93 extending out of the annular section 92 are the same, that is, the end connection lines of the multi-layer transverse connecting rods 93 are parallel to the edges of the multiple annular sections 92.

[0032] At both ends of each transverse connecting rod 93, disc-shaped wave-receiving discs 10 are connected and arranged. The end faces of the wave-receiving discs 10 coincide with the plane where the multiple transverse connecting rods 93 are located. The function of the wave-receiving discs 10 is to bear the torsional deformation trend given by the waves to the support structure of the present application and transmit it to the transverse connecting rod 93, so that the annular section 92 connected to the transverse connecting rod 93 generates a rotational trend around the central axis of the area surrounded by the multiple stay cable sections 91, that is, drives the annular section 92 and the stay cable section 91 to rub and consume energy.

[0033] As Figure 3 shown, a second floating body 94 is inserted through the middle of each transverse connecting rod 93 and directly below the first floating body 3.

[0034] The second floating body 94 is in the shape of a cylinder, with horizontal upper and lower end faces, and the end face areas of the multiple second floating bodies 94 gradually decrease from the upper-layer transverse connecting rod 93 to the lower-layer transverse connecting rod 93. The purpose of this design is to play a buffering role when the sea waves give the support structure of the present application an up-and-down deformation trend, reduce the impact on the first floating body 3, and at the same time, the second floating body 94 can provide a floating movement trend for the annular section 92 in its layer, which can strengthen the braided anchoring effect between the annular section 92 and the stay cable section 91, and is more conducive to the friction energy consumption between the two.

[0035] A gap should also be left between adjacent stay cable sections 91 to ensure that the impact of the water flow can directly affect the second floating body 94 through the gap between the stay cable section 91 and the annular section 92.

[0036] The parts of the multiple transverse connecting rods 93 located outside the annular section 92 are connected by a rubber series belt 11. The function of the rubber series belt 11 is to coordinate the rotation trends of the multiple transverse connecting rods 93.

[0037] In the ocean, as the depth increases, the speed of the water flow becomes faster. For the support structure of this application, the rotational tendency of the upper horizontal connecting rod 93 affected by the water flow is greater than that of the lower horizontal connecting rod 93 affected by the water flow. However, the rotational amplitude of the upper horizontal connecting rod 93 is also greater than that of the lower horizontal connecting rod 93. By setting the rubber series belt 11, the integrity of multiple horizontal connecting rods 93 can be strengthened, maximizing the rotational tendency of all horizontal connecting rods 93, and maximizing the frictional energy consumption of driving the annular section 92 and the stay cable section 91.

[0038] Both the stay cable section 91 and the annular section 92 are composed of an alloy support body wrapped with a friction-resistant rubber material, and chamfers should be paid attention to during production to minimize stress concentration. At the same time, between the alloy material and the high-friction rubber material, a form of arranging ribs or rivets on the outer side of the alloy material should be adopted to minimize the slippage between the alloy material and the high-friction rubber material. The stay cable section 91 and the annular section 92 made in this way have good elasticity, high toughness, high strength, are easy to be processed into a braided structure, and have strong friction between them. In addition, the stay cable section 91 should also be able to withstand multiple repeated collisions of the horizontal connecting rod 93.

[0039] As Figure 6 shown, the horizontal connecting rod 93 is connected to the annular section 92 through a fitting 95.

[0040] The fitting 95 includes two side plates 951, two connecting plates 952 are connected between the two side plates 951. The annular section 92 is composed of two semi-circular ring structures, and the two semi-circular ring structures are connected between the two side plates and fixed by bolt connection, so that the annular section 92 is integrally annular. The horizontal connecting rod 93 vertically passes through the two side plates 951.

[0041] Each stay cable section 91 is connected to the first annular outer ring 4 and the annular inner ring 8 through an end connector.

[0042] As Figure 7 shown, the end connector includes a bottom plate 911, two vertical plates 912 are connected to the bottom plate 911, the stay cable section 91 is connected between the two vertical plates 912, and also includes a bolt passing through the two vertical plates 912, and is connected to the first annular outer ring 4 and the annular inner ring 8 through the bolt.

[0043] A plurality of mooring cables 6 are circumferentially connected to the outer periphery of the second annular outer ring 7, and the other ends of the mooring cables 6 are fixedly connected to the pile foundation through anchor fittings.

[0044] A plurality of support columns 1 are circularly arrayed and connected to the upper surface of the first annular outer ring 4, and an inclined photovoltaic panel 2 is connected to each support column 1. In addition to the function of generating electricity by receiving sunlight, the inclined photovoltaic panel 2 also has to bear the wind load on the sea surface, making the first annular outer ring 4 have a tendency to rotate around the first floating body 3.

[0045] In the floating photovoltaic support structure of the present invention, the structural characteristics determine that the rotation angle of the upper horizontal link 93 is greater than that of the lower horizontal link 93. Since multiple horizontal links 93 rotate coordinately as a whole, multiple horizontal links 93 may all collide with the stay cable section 91. Since the stay cable section 91 belongs to a flexible structure, if multiple horizontal links 93 all collide with the stay cable section 91, it indicates that the rotation trend of multiple horizontal links 93 is greater than that of the first annular outer ring 4. 1) If this state lasts for a short time, the stay cable section 91 with a larger width impacted by the horizontal link 93 is prone to local out-of-plane torsion, that is, the planar projection of the stay cable section 91 continuously impacted by the horizontal link 93 in the rotation direction of multiple stay cable sections 91 will become larger, and the resistance of the stay cable section 91 undergoing out-of-plane torsion to seawater will increase, which is also conducive to dissipating wave energy. 2) If this state lasts for a long time, this working condition mainly corresponds to local vortices at sea. At this time, the buoyancy of the inner annular ring 8 and the second annular outer ring 7 will increase, and the two will have a smaller upward movement trend. At this time, the stay cable section 91 will be in a relaxed state, and multiple stay cable sections 91 are more likely to undergo out-of-plane torsion in this state, increasing the resistance of multiple stay cable sections 91 to seawater, which is also conducive to dissipating wave energy.

[0046] The principle of the floating photovoltaic support structure in the present invention for dissipating wave impact energy is as follows:

[0047] The stay cable section 91 and the annular section 92 can form a braided structure with strong integrity, and energy is dissipated through contact friction. The middle part of the inner annular ring 8 is a circular hole, which can effectively reduce the upward impact of waves, so it can cooperate with the first floating body 3 with a large buoyancy to tighten the stay cable section 91. The buoyancy of the second floating body 94 itself will also drive the horizontal link 93 to have an upward movement trend. Since the deformation of the annular section 92 itself is limited by the material and the stay cable section 91, the stay cable section 91 and the annular section 92 can be in a tight state. The wind load on the sea surface will cause the first annular outer ring 4 to have a rotation trend, and the wave disks 10 under the sea surface will also be affected by waves to cause multiple horizontal links 93 to have a rotation trend. If the rotation angle of the stay cable section 91 caused by the first annular outer ring 4 is different from the rotation angle of the annular section 92 caused by multiple horizontal links 93, the stay cable section 91 and the annular section 92 will frictionally dissipate energy and dissipate wave impact energy. In actual engineering, considering the horizontal action of the sea breeze on the support structure by waves is not strictly symmetric along the vertical symmetry axis of the support structure, then it will definitely cause a repeated torsional trend of the structure itself, that is, the stay cable section 91 and the annular section 92 will repeatedly generate a trend of frictionally dissipating energy. In addition, the vertical action of the waves themselves on the support structure will directly cause multiple second floating bodies 94 to oscillate repeatedly in the vertical direction, that is, the annular section 92 will have an up-and-down reciprocating movement trend of frictionally dissipating energy relative to the stay cable section 91.

[0048] In the offshore floating photovoltaic support structure of the present invention, the tendency of the support mechanism to twist caused by the action of waves and sea breeze is converted into the relative rotational friction energy consumption between the annular section 92 and the stay section 91, which can effectively reduce the influence of the horizontal action of waves and sea breeze on the first floating body 3; and in addition to directly resisting the impact of part of the waves in the vertical direction, the second floating body 94 can avoid the direct large-area impact of sea waves on the first floating body 3. The second floating body 94 can further drive the friction energy consumption between the annular section 92 and the stay section 91 by using its own impact process.

Claims

1. Offshore floating photovoltaic support structure, comprising a first floating body (3) for supporting a flat photovoltaic panel (5), characterized in that, The outer periphery of the first floating body (3) is connected to the first annular outer ring (4) through a bearing. An annular inner ring (8) is arranged directly below the first floating body (3). The first annular outer ring (4) is connected to the annular inner ring (8) through a plurality of stay cables (91). A plurality of annular segments (92) are arranged staggeredly between the plurality of stay cables (91). The plurality of stay cables (91) and the plurality of annular segments (92) form a braided structure. The structure further includes a plurality of transverse connecting rods (93) passing through the annular segments (92). Both ends of each transverse connecting rod (93) are respectively connected to a wave-receiving disc (10). The outer periphery of the annular inner ring (8) is connected to the second annular outer ring (7) through a bearing; The middle of each transverse connecting rod (93) and directly below the first floating body (3) is connected to a second floating body (94) in a penetrating manner; The parts of the plurality of transverse connecting rods (93) located outside the annular segments (92) are connected through a rubber series belt (11); Each stay cable (91) is connected to the first annular outer ring (4) and the annular inner ring (8) through end connectors; The transverse connecting rod (93) is connected to the annular segment (92) through a fitting (95).

2. The floating photovoltaic support structure according to claim 1, characterized in that The structures of the stay cable (91) and the annular segment (92) are both composed of an alloy support body coated with a friction-resistant rubber material.

3. The floating photovoltaic support structure at sea according to claim 2, characterized in that, The end connector includes a bottom plate (911). Two vertical plates (912) are connected to the bottom plate (911). The stay cable (91) is connected between the two vertical plates (912). The structure further includes a bolt passing through the two vertical plates (912), and is connected to the first annular outer ring (4) and the annular inner ring (8) through the bolt.

4. The floating photovoltaic support structure according to claim 1, wherein The fitting (95) includes two side plates (951). Two connecting plates (952) are connected between the two side plates (951). The annular segment (92) is composed of two semi-circular ring structures. The two semi-circular ring structures are connected between the two side plates and are fixedly connected through bolts. The transverse connecting rod (93) vertically passes through the two side plates (951).

5. The floating photovoltaic support structure according to claim 1, characterized in that, A plurality of mooring cables (6) are circumferentially connected to the outer periphery of the second annular outer ring (7). The other ends of the mooring cables (6) are fixedly connected to the pile foundation through anchor fittings.

6. The floating photovoltaic support structure according to claim 1, wherein, A plurality of support columns (1) are circularly arrayed and connected to the upper surface of the first annular outer ring (4). An inclined photovoltaic panel (2) is connected to each support column (1).

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