A bearing structure, a flexible photovoltaic tracking bracket and a flexible photovoltaic system

Abstract

The present invention relates to the technical field of photovoltaic equipment, in particular to a bearing structure, a flexible photovoltaic tracking bracket and a flexible photovoltaic system, which includes a load-bearing cable and a support beam. Both ends of the load-bearing cable are fixedly connected with a rotating mechanism. The rotating mechanism includes symmetrically arranged straight parts, chamfered parts and arc parts. One end of the straight part intersects with the chamfered part, and the arc part is fixedly connected to the other end of the straight part and is bent inward. The load-bearing cable passes through the arc part and is anchored and connected to the arc part. The chamfered part is rotatably connected to the top of the support beam; an end column is fixedly connected to the bottom of the support beam. The load-bearing cables are arranged in parallel on the top of the support beam. Two load-bearing cables are fixed and anchored to the rotating mechanism above the end column as a group. The photovoltaic modules are fixedly connected to the top of the paired load-bearing cables through clamps, realizing the tracking rotation of the photovoltaic modules with respect to the sun angle, improving the power generation efficiency. When the overall photovoltaic system bears a large wind force, by rotating the rotating mechanism to the clockwise extreme position or the counterclockwise extreme position, it can effectively play a better limiting role on the overall photovoltaic system and improve the wind resistance ability.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic support equipment, and in particular to a bearing structure, a flexible photovoltaic tracking support and a flexible photovoltaic system. Background Art

[0002] Flexible photovoltaic bracket is a new type of photovoltaic system developed in recent years. The system has the advantages of large span, high clearance and low cost. It is widely used in complex terrain and other scenes. At present, most traditional flexible brackets rotate at fixed angles. Since they cannot track the rotation of the sun in real time, the power generation efficiency of photovoltaic modules is low. In addition, the existing flexible photovoltaic tracking bracket does not have a limiting function. When it is subjected to large wind loads, it is easy to be damaged by wind and cause structural failure. Summary of the invention

[0003] In view of the above problems existing in the prior art, a bearing structure, a flexible photovoltaic tracking bracket and a flexible photovoltaic system are now provided.

[0004] The specific technical solutions are as follows:

[0005] A bearing structure is designed, including a load-bearing cable and a support beam. Both ends of the load-bearing cable are fixedly connected with a rotating mechanism. The rotating mechanism includes a straight portion, a chamfered portion, and an arc portion that are symmetrically arranged. One end of the straight portion intersects with the chamfered portion, the arc portion is fixedly connected to the other end of the straight portion and is bent inwardly. The load-bearing cable passes through the arc portion and is anchored on the arc portion, and the chamfered portion is rotatably connected to the top of the support beam.

[0006] Preferably, a T-shaped slide groove is fixedly connected to the top of the support beam, a T-shaped slide rail is slidably connected to the T-shaped slide groove, and the T-shaped slide rail is driven by a driving mechanism to perform reciprocating linear motion on the T-shaped slide groove.

[0007] Preferably, a transmission shaft is fixedly connected to the chamfered portion, a first gear is fixedly mounted on the transmission shaft, and a spur rack portion meshingly connected to the first gear is provided on the T-shaped slide rail.

[0008] Preferably, a bearing seat is fixedly installed on the top of the T-shaped slide groove, a bearing is installed on the bearing seat, and the transmission shaft passes through the chamfered portion, the bearing, and the first gear.

[0009] Preferably, the driving mechanism is configured as one of a hydraulic cylinder, a worm gear reducer, and an electric push rod.

[0010] Preferably, a limiting portion is provided on the top of the support beam near one side of the rotating mechanism, and when the rotating mechanism rotates clockwise / counterclockwise to a limit angle, the straight portion fits with the limiting portion to prevent the rotating mechanism from continuing to rotate.

[0011] Preferably, the angle between the straight portions is set to 60°, 90° or 120°.

[0012] Preferably, a limiting baffle for restricting the movement of the T-shaped slide rail is fixedly connected to the end position of the top of the support beam.

[0013] A flexible photovoltaic tracking bracket includes the above-mentioned bearing mechanism. An end column is fixedly connected to the bottom of the support beam. The load-bearing cables are arranged in parallel on the top of the support beam, and two load-bearing cables are fixed and anchored on the rotating mechanism above the end column as a group.

[0014] Preferably, an intermediate column is fixedly connected to the bottom of the support beam. The intermediate column is arranged between the end columns, and two load-bearing cables are arranged as a group and penetrate through the rotating mechanism above the intermediate column.

[0015] A flexible photovoltaic system includes the above-mentioned flexible photovoltaic tracking bracket and further includes a photovoltaic module. The photovoltaic module is fixedly connected to the top of the paired load-bearing cables through a fixture.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] 1. By driving the T-shaped slide rail to perform a linear motion through the driving mechanism, the straight rack portion on the T-shaped slide rail drives the first gear to rotate, and the first gear drives the transmission shaft and the rotating mechanism to rotate synchronously, thereby driving the load-bearing cable and the photovoltaic module installed on the load-bearing cable to rotate and track the sun, improving the photoelectric conversion efficiency of the photovoltaic module, and further improving the power generation efficiency.

[0018] 2. When the rotating mechanism rotates to the limit position, the straight portion fits with the limiting portion on the support beam, thereby effectively preventing the rotating mechanism from driving the load-bearing cable and the photovoltaic module to continue rotating beyond the limit position. When the overall photovoltaic system bears a large wind force, by rotating the rotating mechanism to the clockwise limit position or the counterclockwise limit position, it can effectively play a good limiting and supporting role for the overall photovoltaic system and effectively protect against strong winds.

[0019] 3. By adjusting the angle between the straight portions, the tracking rotation range of the overall flexible photovoltaic tracking bracket can be skillfully adjusted, with low adjustment cost and adaptability to more occasions.

[0020] 4. Additional limiting baffles can also be configured according to the actual load conditions or the wind conditions of the application scenario, and a worm and worm gear reducer with a self-locking function can be used to achieve multiple limitings, better protecting the overall photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Referring to the accompanying drawings, the embodiments of the present invention will be described more fully. However, the accompanying drawings are only for illustration and explanation and do not constitute a limitation to the scope of the present invention.

[0022] Figure 1A flexible photovoltaic tracking bracket and a structural diagram of a flexible photovoltaic system proposed by the present invention;

[0023] Figure 2 A schematic diagram of a bearing structure proposed by the present invention;

[0024] Figure 3 An enlarged schematic diagram of part A in the bearing structure proposed by the present invention;

[0025] Figure 4 A schematic diagram of another embodiment of the bearing structure proposed by the present invention;

[0026] Figure 5 A schematic diagram of the rotating mechanism in the bearing structure proposed by the present invention;

[0027] Figure 6 A schematic diagram of the T-shaped slide rail in the bearing structure proposed by the present invention;

[0028] Figure 7 A schematic diagram of the support beam in the bearing structure proposed by the present invention;

[0029] Figure 8 A schematic diagram of the rotating mechanism in the bearing structure when the photovoltaic module is in the flat state;

[0030] Figure 9 A schematic diagram of the rotating mechanism in the bearing structure when the photovoltaic module rotates counterclockwise to the limit position;

[0031] Figure 10 A schematic diagram of the rotating mechanism in the bearing structure when the photovoltaic module rotates clockwise to the limit position;

[0032] The above-mentioned reference numerals represent: 1, end column; 2, intermediate column; 3, support beam; 4, rotating mechanism; 5, load-bearing cable; 6, photovoltaic module; 7, electric control box; 8, T-shaped chute; 9, transmission mechanism; 10, transmission shaft; 11, bearing seat; 12, first gear; 13, T-shaped slide rail; 14, hydraulic cylinder; 15, straight part; 16, chamfered part; 17, arc part; 18, first mounting hole; 19, second mounting hole; 20, strengthening rod; 21, straight rack part; 22, connecting block; 23, mounting seat; 24, worm and worm gear reducer; 25, limiting part; 26, limiting baffle. Detailed implementation manners

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0036] Refer to Figures 2 - 5 , a bearing structure mainly composed of a support beam 3, a rotating mechanism 4, and a load-bearing cable 5. The rotating mechanism 4 is rotatably arranged relative to the support beam 3. The load-bearing cable 5 passes through the rotating mechanism 4 and both ends of the load-bearing cable 5 are anchored on the rotating mechanism 4. The load-bearing cable 5 is used to install a photovoltaic module 6 in a photovoltaic flexible support. When the rotating mechanism 4 rotates relative to the support beam 3, it drives the load-bearing cable 5 and the photovoltaic module 6 installed on the top of the load-bearing cable 5 to rotate, thereby realizing the tracking of the sun angle.

[0037] Further, the rotating mechanism 4 is arranged in a similar inverted "A" structure as shown in Figure 5 , which is composed of symmetrically arranged straight portions 15, arc portions 17, and chamfer portions 16. The bottoms of the straight portions 15 intersect at the chamfer portion 16, and the arc portions 17 are fixedly connected to the tops of the straight portions 15. The arc portions 17 are bent inward. When the arc portions 17 bent inward are completely set and the straight portions 15 rotate to coincide with the limiting portion 25, it will not cause the contact between the load-bearing cable 5 and the support beam 3, thereby avoiding the wear of the load-bearing cable 5.

[0038] Preferably, a first mounting hole 18 for installing a transmission shaft 10 is opened on the chamfer portion 16, a second mounting hole 19 for the transmission of the load-bearing cable is opened on the arc portion 17, and a reinforcing rod 20 for structural strengthening is fixedly connected between the straight portions 15. When the rotating mechanism 4 rotates, it rotates around the transmission shaft 10 and drives the load-bearing cable 5 installed on the arc portion 17 to rotate.

[0039] In some alternative embodiments, a limiting portion 25 is provided on one side of the top of the support beam 3 close to the rotating mechanism 4. When the rotating mechanism 4 rotates clockwise / counterclockwise to the limit angle, the straight portion 15 fits with the limiting portion 25 to prevent the rotating mechanism 4 from continuing to rotate.

[0040] Such as Figure 8 , Figure 9 and Figure 10As shown, when the photovoltaic module 6 is in a horizontal state, the relative position of the rotating mechanism 4 and the support beam 3 is as Figure 8 shown, the straight portion 15 and the limiting portion 25 are in a separated and non-contact state. When the rotating mechanism 4 drives the load-bearing cable 5 and the photovoltaic module 6 to rotate clockwise to the limit position, the relative position of the rotating mechanism 4 and the support beam 3 is as Figure 10 shown. At this time, the straight portion 15 on the right side is in contact and fit with the limiting portion 25 at the top of the support beam 3, thereby preventing the rotating mechanism 4 from driving the load-bearing cable 5 and the photovoltaic module 6 to continue rotating beyond the limit position. When the rotating mechanism 4 drives the load-bearing cable 5 and the photovoltaic module 6 to rotate counterclockwise to the limit position, the relative position of the rotating mechanism 4 and the support beam 3 is as Figure 9 shown. At this time, the straight portion 15 on the left side is in contact and fit with the limiting portion 25 at the top of the support beam 3, thereby preventing the rotating mechanism 4 from driving the load-bearing cable 5 and the photovoltaic module 6 to continue rotating beyond the limit position. When the overall photovoltaic system is subjected to strong wind, by rotating the rotating mechanism 4 to the clockwise limit position or the counterclockwise limit position, it can effectively play a good limiting role on the overall photovoltaic system, thereby providing protection against strong wind.

[0041] In some alternative embodiments, a T-shaped chute 8 is fixedly connected to the top of the support beam 3. A T-shaped slideway matching the T-shaped slide rail 13 is formed inside the T-shaped chute 8. The T-shaped slide rail 13 is slidably connected to the T-shaped chute 8, and the T-shaped slide rail 13 is driven by a driving mechanism to perform reciprocating linear motion on the T-shaped chute 8.

[0042] As Figure 6 shown, further, a transmission shaft 10 is fixedly connected to the chamfered portion 16, such as by welding or key connection. A first gear 12 is fixedly installed on the transmission shaft 10, and a straight rack portion 21 meshing with the first gear 12 is provided on the T-shaped slide rail 13.

[0043] More specifically, a bearing seat 11 is fixedly installed on the top of the T-shaped chute 8. A bearing is installed on the bearing seat 11. The transmission shaft 10 passes through the chamfered portion 16, the bearing, and the first gear 12. The bearing seat 11, the transmission shaft 10, the bearing, and the first gear 12 constitute a transmission mechanism 9 for transmitting the power of the driving mechanism.

[0044] Optionally, the driving mechanism is set to be one of a hydraulic cylinder 14, a worm and worm gear reducer 24, and an electric push rod.

[0045] As Figure 3As shown in the figure, when the driving mechanism is set as the hydraulic cylinder 14 or the electric push rod, the hydraulic cylinder 14 or the electric push rod is fixedly installed at one end of the top of the support beam 3. The output end of the hydraulic cylinder 14 or the electric push rod is fixedly connected to the connecting block 22 arranged at the end of the T-shaped slide rail 13. The telescopic movement of the hydraulic cylinder 14 drives the T-shaped slide rail 13 to perform reciprocating linear motion on the T-shaped chute 8, so as to drive the first gear 12 to rotate through the straight rack portion 21 on the T-shaped slide rail 13. While the first gear 12 rotates, it drives the rotating mechanism 4 to rotate synchronously, thereby realizing the rotation of the load-bearing cable 5 and the photovoltaic module 6 to track the sun angle.

[0046] Similarly, as Figure 4 shown in the figure, when the driving mechanism is set as the worm and worm gear reducer 24, a second gear is fixedly installed at the output end of the worm and worm gear reducer 24. The T-shaped slide rail 13 is simultaneously provided with a straight rack portion 21 meshed and connected with the second gear. The worm and worm gear reducer 24 is preferably fixedly connected to the support beam 3 through the mounting seat 23. The worm and worm gear reducer 24 drives the second gear to rotate, and then drives the T-shaped slide rail 13 to perform reciprocating linear motion on the T-shaped chute 8, so as to drive the first gear 12 to rotate through the straight rack portion 21 on the T-shaped slide rail 13. While the first gear 12 rotates, it drives the rotating mechanism 4 to rotate synchronously, thereby realizing the rotation of the load-bearing cable 5 and the photovoltaic module 6 to track the sun angle. Through the self-locking function of the worm and worm gear reducer 24 and the limiting function of the straight portion 15 and the limiting portion 25, a better limiting effect at the extreme position can be realized, and a greater braking force is provided when the straight portion 15 on the rotating mechanism 4 rotates to the limiting portion 25.

[0047] In addition, those skilled in the art can also select other driving devices that cooperate with gear transmission to realize linear motion transmission as the driving mechanism according to actual needs, which will not be elaborated here.

[0048] In some alternative embodiments, the included angle between the straight portions 15 is set to 60°, 90°, or 120°. It should be noted that since the support beam 3 is horizontally arranged, in the initial state of the rotating mechanism 4 Figure 8 as shown in the figure, when the rotating mechanism 4 is limited by the limiting portion 25 at the top of the support beam 3, the included angle between the straight portions 15 is defined as A°, and its maximum rotation angle is (180 - A) / 2 degrees. Taking the common tracking ranges of ±60°, ±45°, and ±30° in the market as examples, the included angle A between the straight portions 15 is set to 60°, 90°, and 120° respectively.

[0049] Taking A = 60° as an example, since the included angle between the straight portions 15 is set to 60°, when the rotating mechanism 4 rotates clockwise or counterclockwise until the straight portion 15 coincides with the limiting portion 25 at the top of the support beam 3, its rotation tracking range is ±60°, and at the same time, further limiting of the flexible photovoltaic tracking bracket at the extreme position is realized.

[0050] In some alternative embodiments, a limiting baffle 26 for restricting the movement of the T-shaped slide rail 13 is fixedly connected to the end position at the top of the support beam 3. When the T-shaped slide rail 13 moves to the extreme position, it contacts the limiting baffle 26. At this time, the straight portion 15 coincides with the limiting portion 25 exactly, thus playing a dual limiting role. More specifically, when the driving mechanism is set as the hydraulic cylinder 14 or the electric push rod, the limiting baffle 26 is arranged at the end far from the driving mechanism. When the driving mechanism is set as the worm and worm gear reducer 24, limiting baffles 26 are arranged at both the left and right ends of the support beam 3.

[0051] As Figure 1 shown, a flexible photovoltaic tracking bracket includes the above-mentioned bearing mechanism. An end column 1 is fixedly connected to the bottom of the support beam 3. The load-bearing cables 5 are arranged in parallel on the top of the support beam 3. Two of the load-bearing cables 5 are fixed and anchored on the rotating mechanism 4 above the end column 1 as a group. The flexible photovoltaic tracking bracket with only the end column 1 is particularly suitable for scenarios with a small span.

[0052] Preferably, an intermediate column 2 is fixedly connected to the bottom of the support beam 3. The intermediate column 2 is arranged between the end columns 1. Two of the load-bearing cables 5 are threaded through the rotating mechanism 4 above the intermediate column 2 as a group. The single load-bearing cable 5 of the flexible photovoltaic tracking bracket with the intermediate column 2 has at least 3 support points, and is particularly suitable for scenarios with a larger span.

[0053] Furthermore, when the span of the flexible photovoltaic tracking bracket is large, a multi-point driving method as Figure 1 shown is adopted for synchronous driving. Electric control boxes 7 for controlling the corresponding driving are arranged on the corresponding end columns 1 or intermediate columns 2. The driving mechanisms at the tops of the corresponding columns are synchronously driven through the FreeRTOS operating system in the prior art, so as to bear a larger load.

[0054] A flexible photovoltaic system includes the above-mentioned flexible photovoltaic tracking bracket, and further includes a photovoltaic module 6. The photovoltaic module 6 is fixedly connected to the top of the paired load-bearing cables 5 through a fixture. A weather station, an inclination sensor, etc. commonly used in the prior art are also installed in the flexible photovoltaic system.

[0055] When the overall flexible photovoltaic tracking bracket and the flexible photovoltaic system are in operation, the inclination sensor detects the angle of the current photovoltaic module 6 and transmits the signal to the electric control box 7. The electric control box 7 controls the driving mechanism to perform corresponding actions to drive the T-shaped slide rail 13 to move linearly. The straight rack portion 21 on the T-shaped slide rail 13 drives the first gear 12 to rotate. The first gear 12 drives the transmission shaft 10 and the rotating mechanism 4 to rotate synchronously, thereby driving the load-bearing cable 5 and the photovoltaic module 6 installed on the load-bearing cable 5 to rotate and track the sun, improving the photoelectric conversion efficiency of the photovoltaic module 6, and thus improving the power generation efficiency. When the rotating mechanism 4 rotates to the limit position, the straight portion 15 abuts against the limiting portion 25 on the support beam 3, thereby effectively preventing the rotating mechanism 4 from driving the load-bearing cable 5 and the photovoltaic module 6 to continue rotating beyond the limit position. When the overall photovoltaic system is subjected to strong wind, rotating the rotating mechanism 4 to the clockwise limit position or the counterclockwise limit position can effectively limit the overall photovoltaic system, thereby providing protection against strong wind. In addition, additional limiting baffles 26 can be configured according to the actual load conditions or the wind conditions of the application scenario, and a worm and worm gear reducer 24 with a self-locking function can be used to achieve multiple limitings, better protecting the overall photovoltaic system.

[0056] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A load-bearing structure, comprising a load-bearing cable (5) and a support beam (3), characterized in that: Both ends of the load-bearing cable (5) are fixedly connected with a rotating mechanism (4). The rotating mechanism (4) is composed of symmetrically arranged straight portions (15), chamfered portions (16), and arc portions (17). One end of the straight portion (15) intersects with the chamfered portion (16). The arc portion (17) is fixedly connected to the other end of the straight portion (15) and is bent inward. The load-bearing cable (5) passes through the arc portion (17) and is anchored and connected to the arc portion (17). The chamfered portion (16) is rotatably connected to the top of the support beam (3). A T-shaped chute (8) is fixedly connected to the top of the support beam (3). A T-shaped slide rail (13) is slidably connected to the T-shaped chute (8). The T-shaped slide rail (13) is driven by a driving mechanism to perform a reciprocating linear motion on the T-shaped chute (8). A transmission shaft (10) is fixedly connected to the chamfered portion (16). A first gear (12) is fixedly installed on the transmission shaft (10). A straight rack portion (21) meshing with the first gear (12) is arranged on the T-shaped slide rail (13). A limiting portion (25) is arranged on one side of the top of the support beam (3) close to the rotating mechanism (4). When the rotating mechanism (4) rotates clockwise / counterclockwise to the limit angle, the straight portion (15) abuts against the limiting portion (25) to prevent the rotating mechanism (4) from continuing to rotate.

2. The load-bearing structure according to claim 1, wherein: A bearing seat (11) is fixedly installed on the top of the T-shaped chute (8). A bearing is installed on the bearing seat (11). The transmission shaft (10) passes through the chamfered portion (16), the bearing, and the first gear (12).

3. A load-bearing structure according to claim 1, characterized in that: The driving mechanism is set as one of a hydraulic cylinder (14), a worm and worm gear reducer (24), and an electric push rod.

4. A bearing structure according to claim 1, characterized in that: The included angle between the straight portions (15) is set to 60° or 90° or 120°.

5. A bearing structure according to claim 1, characterized in that: A limiting baffle (26) for restricting the movement of the T-shaped slide rail (13) is also fixedly connected to the end position of the top of the support beam (3).

6. A flexible photovoltaic tracking bracket, comprising the bearing structure according to any one of claims 1-5, characterized in that: End columns (1) are fixedly connected to the bottom of the support beam (3). The load-bearing cables (5) are arranged in parallel on the top of the support beam (3). Two load-bearing cables (5) are fixed and anchored to the rotating mechanism (4) above the end columns (1) as a group.

7. The flexible photovoltaic tracking bracket according to claim 6, characterized in that: Intermediate columns (2) are fixedly connected to the bottom of the support beam (3). The intermediate columns (2) are arranged between the end columns (1). Two load-bearing cables (5) are arranged as a group and pass through the rotating mechanism (4) above the intermediate columns (2).

8. A flexible photovoltaic system, comprising the flexible photovoltaic tracking bracket according to any one of claims 6-7, characterized in that: A photovoltaic module (6) is also included. The photovoltaic module (6) is fixedly connected to the top of the paired load-bearing cables (5) through a fixture.

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