Photovoltaic module rack grounding device for large photovoltaic plants

Abstract

The application discloses a photovoltaic module support grounding device for a large photovoltaic factory area. The grounding device comprises a photovoltaic unit and a plurality of support columns which are arranged below the photovoltaic unit, a grounding assembly is arranged at the bottom of each support column, the grounding assembly comprises a ground body which is embedded into soil and a grounding wire which is connected to the photovoltaic unit, a ring groove frame is arranged on the ground body, a ring groove is arranged in the ring groove frame, an inner hole is arranged in the inner wall of the ring groove, a lock catch assembly is arranged in the inner hole, a lock pin is arranged in the inner hole and is capable of being telescopically extended through a first spring, the lock pin is used for fixing a middle disc, and a grounding body which is in conductive connection with the grounding wire is further arranged on the middle disc. The modular installation can improve the working efficiency of installation and is convenient for maintenance, can improve the solar energy absorption efficiency of the photovoltaic panel, and the grounding system is convenient to install and can be repeatedly used.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, specifically to a grounding device for photovoltaic module supports in large photovoltaic factories. Background Technology

[0002] In the construction and operation of large-scale photovoltaic (PV) plants, grounding devices are key components to ensure the safe and stable operation of PV systems. Specifically, grounding devices in PV plants include: lightning protection grounding, mainly used for lightning arresters (lightning rods, strips) and down conductors; working grounding, mainly providing a potential reference point for electrical systems (such as transformer neutral points, inverter internal logic grounds, etc.); protective grounding, grounding the non-energized metal parts of electrical equipment (module supports, inverters, transformer enclosures, distribution cabinet enclosures, etc.) to prevent leakage hazards; and shielding grounding, used for grounding cable shielding layers, control cabinets, etc., to prevent electromagnetic interference.

[0003] The protective grounding of photovoltaic module supports requires that the metal rails / pillars of each row or string of supports be reliably connected via grounding wires (usually PV1-F 1×4mm² or thicker brass wire), and ultimately connected to the horizontal grounding trunk line (galvanized flat steel). The connection points must be treated with anti-corrosion measures. However, the installation of this grounding system has several shortcomings. First, the installation process is complex and cumbersome, requiring the excavation of the ground to bury the grounding electrode, followed by the installation of down conductors. This process consumes a significant amount of manpower and time, resulting in low installation efficiency and increased construction costs. Second, there is a lack of effective vibration damping measures. When the photovoltaic plant is located near roads or other areas prone to vibration, the vibration can damage the photovoltaic panels and other equipment, affecting their lifespan and performance. Furthermore, existing grounding systems are not convenient to install, difficult to reuse repeatedly, and the angle adjustment of the photovoltaic panels is not flexible enough, hindering the full absorption of solar energy and reducing photovoltaic power generation efficiency. Therefore, developing a grounding device for photovoltaic module supports in large-scale photovoltaic plants is of significant practical importance. Summary of the Invention

[0004] To address the shortcomings of the prior art, this invention provides a grounding device for photovoltaic module supports in large photovoltaic factories. This grounding device, through its modular design, simplifies the installation process, improves installation efficiency and subsequent maintenance, and offers reliable installation and reusability.

[0005] To achieve the above-mentioned technical objectives, the present invention provides a grounding device for photovoltaic module supports in large photovoltaic factories, comprising a photovoltaic unit and multiple support columns dispersed below the photovoltaic unit. A grounding component is provided at the bottom of each support column. The grounding component includes a buried body embedded in the soil and a grounding wire connected to the photovoltaic unit. A ring groove frame is provided on the top of the buried body, and the ring groove frame is located on the ground. The ring groove frame has a ring groove, and the inner wall of the ring groove has multiple inner holes. Each inner hole has a locking component. A circular plate is provided on the inner side of the ring groove of the ring groove frame, and a central plate is provided on the circular plate. Locking holes are provided around the central plate corresponding to the positions of each locking component. The support columns are connected to the central plate. A grounding ring is connected to the lower end of the grounding wire. A through hole is provided in the central plate, and the grounding ring is installed at the through hole of the central plate. A grounding body passes through the grounding ring, and the grounding body passes through the central plate and the buried body in sequence and is inserted into the soil. A detachable ring cover is provided at the opening of the ring groove of the ring groove frame.

[0006] The locking assembly includes a locking cylinder disposed in the inner hole, a locking pin slidably disposed in the locking cylinder, the locking pin extending through the inner hole into the inner ring of the annular groove frame, a first spring disposed inside the locking cylinder, the two ends of the first spring being connected to the inner circular surface of the locking cylinder and the locking pin respectively, a pull rod disposed on the side wall of the locking pin, and a guide groove disposed on the side wall of the locking cylinder correspondingly, the guide groove being composed of a straight segment and an arc segment; when the pull rod is pulled and engaged into the arc segment of the guide groove, the locking pin retracts into the interior of the locking cylinder; when the pull rod slides to the straight segment of the guide groove, the locking pin extends out of the locking cylinder and engages with the corresponding lock hole.

[0007] A preferred technical solution of the present invention is as follows: the support column is connected to the central plate through a shock-absorbing mechanism. The shock-absorbing mechanism includes a central column that passes through the center above the central plate and shock-absorbing cylinders that are dispersed around the central column. A sliding column is slidably provided inside the central column, and a base is provided above the sliding column. The support column is installed on the base. A sleeve is fitted around the outside of the central column, and shock-absorbing cylinders are provided around the sleeve. A slider is slidably provided in each group of shock-absorbing cylinders. A connecting rod is hinged between the slider and the base and between the slider and the central plate.

[0008] The preferred technical solution of the present invention is as follows: a top rotating seat is provided at the top of each support column, the top of the top rotating seat is rotatably connected to the photovoltaic panel mounting bracket of the photovoltaic unit, a first gear is provided on the rotating shaft of the photovoltaic panel mounting bracket, a second gear is meshed on the side of the first gear, the second gears at the top of the same row of support columns are all provided on a long rotating shaft, and the long rotating shaft is rotatably provided on the top rotating seat of the same row of support columns, and a driving mechanism is provided on the long rotating shaft.

[0009] The preferred technical solution of the present invention is as follows: the top of the grounding body has a thread, a nut is screwed into the thread of the grounding body and fixed to the middle plate by the nut, and the lower end of the grounding body is provided with a spiral blade; the grounding wire, the grounding ring and the grounding body are connected to each other to form a grounding assembly.

[0010] A preferred technical solution of the present invention is as follows: the inner wall of the annular groove is provided with four inner holes, and the middle plate is provided with four sets of locking holes around its perimeter.

[0011] A preferred technical solution of the present invention is that a protective cover is detachably provided on the upper surface of the middle plate.

[0012] A preferred technical solution of the present invention is as follows: the end of the shock absorber is threaded with a screw, and a second spring is connected between the slider and the second spring.

[0013] A preferred technical solution of the present invention is as follows: the driving mechanism includes a speed regulator and a handwheel, the output shaft of the speed regulator is connected to a long rotating shaft, and the handwheel is mounted on the input shaft of the speed regulator.

[0014] A preferred technical solution of the present invention is that the handwheel is replaced by a drive motor.

[0015] The advantages of this invention compared to the prior art are:

[0016] (1) The present invention uses a ring groove frame, locking pin and other structures to achieve rapid fixing of the middle plate. The modular design makes the installation process simple and easy to operate, which can significantly improve the installation efficiency, reduce manpower and time costs, and facilitate subsequent inspection and maintenance work.

[0017] (2) By setting up shock-absorbing structures such as shock-absorbing cylinders, sliders, and second springs, this invention can effectively filter out the vibration caused by road vibration in the installation area, provide a stable operating environment for photovoltaic panels and other equipment, reduce the damage of vibration to the equipment, and extend the service life of the equipment.

[0018] (3) The present invention utilizes the transmission mechanism of gears and long rotating shafts, and can realize the synchronous rotation of multiple photovoltaic panels by rotating the handwheel, so that the photovoltaic panels can be flexibly aligned with the sunlight, fully absorb solar energy, and greatly improve the photovoltaic power generation efficiency.

[0019] (4) The grounding electrode of the present invention is provided with a spiral blade at the lower end, which makes it easy to screw the grounding electrode into the soil. The installation is simple and quick, and the grounding system composed of grounding wire, grounding ring and grounding electrode can be reused, which reduces the cost of use;

[0020] (5) The protective cover on the upper surface of the disk in this invention can be detachably installed, which can effectively protect the internal parts from the corrosion and damage of the external environment and improve the reliability and safety of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the front of the present invention.

[0022] Figure 2 This is a schematic diagram of the overall structure of the back side of the present invention.

[0023] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0024] Figure 4 This is a schematic diagram of the locking pin installation structure of the present invention.

[0025] Figure 5 This is a cross-sectional structural schematic diagram of the present invention.

[0026] Figure 6 This is a schematic diagram of the spiral blade of the present invention.

[0027] Figure 7 This is a schematic diagram of the installation structure of the grounding electrode of the present invention.

[0028] Reference numerals: 1-Buried body; 2-Ring groove frame; 201-Ring groove; 202-Inner hole; 203-Circular plate; 3-Locking cylinder; 301-Guide groove; 4-Locking pin; 5-Pull rod; 6-First spring; 7-Ring cover; 8-Middle plate; 801-Locking hole; 9-Middle column; 10-Sliding column; 11-Base; 12-Support column; 13-Sleeve; 14-Shock absorber; 15-Slider; 16-Connecting rod; 17-Screw; 18-Second spring; 19-Top rotating seat; 20-Photovoltaic unit; 21-First gear; 22-Second gear; 23-Long rotating shaft; 24-Speed ​​regulator; 25-Handwheel; 26-Grounding wire; 27-Grounding ring; 28-Grounding body; 2801-Helical blade; 29-Nut; 30-Protective cover. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The embodiment provides a grounding device for photovoltaic module supports in a large photovoltaic factory area, such as... Figure 1 and Figure 2 As shown, it includes a photovoltaic unit 20 and multiple support columns 12 distributed below the photovoltaic unit 20, with a grounding component at the bottom of each support column 12; as shown Figure 1 , Figure 5 and Figure 7As shown, the grounding assembly includes a buried body 1 embedded in the soil. The buried body 1 has a ring groove frame 2 on its top, and the ring groove frame 2 is located on the ground. The ring groove frame 2 has a ring groove 201, and the inner wall of the ring groove 201 has four inner holes 202. Each of the four inner holes 202 has a locking assembly. A circular plate 203 is provided inside the ring groove 201 of the ring groove frame 2. A central plate 8 is provided on the circular plate 203, and locking holes 801 are provided around the central plate 8 corresponding to the positions of each locking assembly. A support column 12 is connected to the central plate 8; as... Figure 4 and Figure 5 As shown, the locking assembly includes a locking cylinder 3 disposed in the inner hole 202. A locking pin 4 matching the locking hole 801 is slidably disposed in the locking cylinder 3. The locking pin 4 extends through the inner hole 202 into the inner ring of the annular groove frame 2. A pull rod 5 is provided on the side wall of the locking pin 4. A guide groove 301 is provided on the side wall of the locking cylinder 3 for the pull rod 5 to be inserted into. The guide groove 301 is composed of a straight segment and an arc segment. A first spring 6 is provided inside the locking cylinder 3. The two ends of the first spring 6 are respectively connected to the inner circular surface of the locking cylinder 3 and the locking pin 4. An annular cover 7 is detachably provided on the opening of the annular groove 201 of the annular groove frame 2.

[0031] When installing the grounding assembly, the buried body 1 is pre-buried in the soil. When the assembly needs to be installed, the ring cover 7 is opened, the pull rod 5 is pulled, and the pull rod 5 is inserted into the arc section of the guide groove 301, that is, the locking pin 4 is retracted into the inside of the locking cylinder 3. The middle plate 8 is aligned with the top of the circular plate 203, and the middle plate 8 is placed into the circular plate 203. Then the locking pin 4 is placed into the straight section of the guide groove 301. The first spring 6 provides elastic force, so that the end of the locking pin 4 abuts against the side of the middle plate 8. Then the middle plate 8 is twisted. When the locking hole 801 on the middle plate 8 coincides with the locking pin 4, the first spring 6 provides elastic force, so that the locking pin 4 is inserted into the locking hole 801, that is, the middle plate 8 is fixed in the circular plate 203. Then the ring cover 7 is closed.

[0032] In the embodiments, such as Figure 1 , Figure 5 and Figure 7 As shown, the middle plate 8 has a through hole, and a grounding wire 26 is connected to the photovoltaic unit 20. A grounding ring 27 is connected to the lower end of the grounding wire 26, and a grounding body 28 passes through the grounding ring 27. The top of the grounding body 28 has threads, and a nut 29 is screwed into the threads of the grounding body 28. A spiral blade 2801 is provided at the lower end of the grounding body 28. Specifically, the grounding body 28 is passed through both the grounding ring 27 and the through hole on the middle plate 8, and the spiral blade 2801 is aligned with the soil. The grounding body 28 is twisted so that the spiral blade 2801 is screwed into the soil. The nut 29 is then screwed into the threads of the grounding body 28, fixing the grounding body 28 and the grounding ring 27 to the middle plate 8. Therefore, the grounding wire 26, the grounding ring 27, and the grounding body 28 are electrically connected, forming a grounding system. This grounding system is easy to install and can be reused repeatedly. A protective cover 30 is detachably provided on the upper surface of the middle plate 8 to protect the internal components.

[0033] Considering that this device is installed near roads or similar locations, it needs to have shock resistance to protect the photovoltaic unit 20. A central column 9 is installed above the center of the central plate 8. A sliding column 10 is slidably installed in the central column 9. A base 11 is located above the sliding column 10, and a support column 12 is connected above the base 11. A sleeve 13 is fitted around the outside of the central column 9. Shock-absorbing cylinders 14 are arranged around the sleeve 13. A slider 15 is slidably installed in the shock-absorbing cylinder 14. Connecting rods 16 are hinged between the slider 15 and the base 11, and between the slider 15 and the central plate 8. A screw 17 is threaded to the end of the shock-absorbing cylinder 14, and a second spring 18 connects the slider 15 and the screw 17.

[0034] Specifically, by simultaneously turning the four screws 17 and adjusting the degree to which the screws 17 are screwed into the shock absorber 14, the tension of the second spring 18 can be adjusted. When there is vibration on the road where it is installed, the vibration is filtered out by the second spring 18.

[0035] The photovoltaic unit 20 in this embodiment includes a photovoltaic panel mounting bracket and multiple photovoltaic panels. To facilitate angle adjustment of the photovoltaic panels, such as... Figures 1 to 3 As shown, a top rotating seat 19 is provided at the top of the support column 12. A photovoltaic panel mounting bracket for the photovoltaic unit 20 is rotatably mounted on the top of the top rotating seat 19. A first gear 21 is provided on the rotating shaft of the photovoltaic panel mounting bracket. A second gear 22 meshes with the side of the first gear 21. The second gear 22 is rotatably mounted inside the top rotating seat 19. In order to facilitate the simultaneous control of the angle of multiple photovoltaic panels in the same photovoltaic unit, the second gear 22 above each support column of the same photovoltaic unit or the same row of photovoltaic units is connected by a long rotating shaft 23, and the long rotating shaft 23 is rotatably mounted on each top rotating seat 19. A speed regulator 24 is provided on the side of the first support column 12 at the far end. The speed regulator 24 is mounted on the photovoltaic unit 20, and a handwheel 25 is provided on the input shaft of the speed regulator 24. The output shaft of the speed regulator 24 is connected to the long rotating shaft 23.

[0036] Specifically, manually turning the handwheel 25 transmits power through the speed regulator 24, driving the long rotating shaft 23 to rotate. This power is then transmitted through the second gear 22 and the first gear 21 of each group, causing the photovoltaic panel 20 to rotate and align with sunlight, thereby improving the efficiency of the photovoltaic panel 20 in absorbing solar energy. In another embodiment, a self-controlled motor can be used to replace the handwheel 25. The self-controlled drive motor is connected to the input shaft of the speed regulator 24, providing power to drive the speed regulator 24.

[0037] Working principle: According to actual needs, multiple photovoltaic units 1 are buried in the soil in advance. When the module needs to be installed, the ring cover 7 is opened, the pull rod 5 is pulled, and the pull rod 5 is inserted into the arc section of the guide groove 301, that is, the locking pin 4 is retracted into the inside of the locking cylinder 3. The middle plate 8 is aligned with the top of the circular plate 203 and placed into the circular plate 203. Then the pull rod 5 is placed into the straight section of the guide groove 301. The first spring 6 provides elastic force, so that the end of the locking pin 4 abuts against the side of the middle plate 8. Then the middle plate 8 is twisted. When the locking hole 801 on the middle plate 8 coincides with the locking pin 4, the first spring 6 provides elastic force, so that the locking pin 4 is inserted into the locking hole 801, that is, the middle plate 8 is fixed in the circular plate 203. Then the ring cover 7 is closed. Modular installation can improve the installation efficiency and facilitate maintenance. Simultaneously turning the four screws 17 adjusts the degree to which the screws 17 are screwed into the shock absorber 14, thereby adjusting the tension of the second spring 18. When the road where it is installed vibrates, the vibration is filtered out by the second spring 18.

[0038] The handwheel 25 can be manually turned or the motor can be automatically controlled to transmit power through the speed regulator 24, drive the long rotating shaft 23 to rotate, and then transmit power through the second gear 22 and the first gear 21 of each group, so that the photovoltaic panel 20 rotates to face the sunlight, thereby improving the efficiency of the photovoltaic panel 20 in absorbing solar energy.

[0039] The grounding electrode 28 is passed through both the grounding ring 27 and the through hole on the intermediate plate 8. The spiral blade 2801 is aligned with the soil, and the grounding electrode 28 is twisted to screw the spiral blade 2801 into the soil. The nut 29 is then screwed into the thread of the grounding electrode 28, fixing the grounding electrode 28 and the grounding ring 27 onto the intermediate plate 8. Therefore, the grounding wire 26, the grounding ring 27, and the grounding electrode 28 are electrically connected, forming a grounding system. This grounding system is easy to install and can be reused.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A grounding device for photovoltaic module supports in a large photovoltaic factory area, comprising a photovoltaic unit (20) and multiple support columns (12) dispersedly arranged below the photovoltaic unit (20), wherein a grounding component is provided at the bottom of each support column (12), characterized in that: The grounding assembly includes a buried body (1) embedded in the soil and a grounding wire (26) connected to the photovoltaic unit (20). The buried body (1) is provided with a ring groove frame (2) on top, and the ring groove frame (2) is located on the ground. The ring groove frame (2) is provided with a ring groove (201). The inner wall of the ring groove (201) is provided with a plurality of inner holes (202). Each inner hole (202) is provided with a locking assembly. The inner side of the ring groove (201) of the ring groove frame (2) is provided with a circular plate (203). A central plate (8) is provided on the circular plate (203). The disc (8) is provided with lock holes (801) around the perimeter of each locking component; the support column (12) is connected to the middle disc (8), the lower end of the grounding wire (26) is connected to a grounding ring (27), the middle disc (8) is provided with a through hole, the grounding ring (27) is installed at the through hole of the middle disc (8), a grounding body (28) passes through the grounding ring (27), and the grounding body (28) passes through the middle disc (8) and the buried body (1) in sequence and is inserted into the soil; the ring groove (201) of the ring groove frame (2) is provided with a detachable ring cover (7). The locking assembly includes a locking cylinder (3) located in the inner hole (202), a locking pin (4) slidably disposed in the locking cylinder (3), the locking pin (4) extending through the inner hole (202) into the inner ring of the ring groove frame (2), a first spring (6) disposed inside the locking cylinder (3), the two ends of the first spring (6) being connected to the inner circular surface of the locking cylinder (3) and the locking pin (4) respectively, a pull rod (5) disposed on the side wall of the locking pin (4), and a guide groove (301) disposed on the side wall of the locking cylinder (3) corresponding to the guide groove (301), the guide groove (301) being composed of a straight segment and an arc segment; when the pull rod (5) is pulled and inserted into the arc segment of the guide groove (301), the locking pin (4) retracts into the interior of the locking cylinder (3); when the pull rod (5) slides to the straight segment of the guide groove (301), the locking pin (4) extends out of the locking cylinder (3) and is inserted into the corresponding lock hole (801).

2. The photovoltaic module support grounding device for a large photovoltaic factory area according to claim 1, characterized in that: The support column (12) is connected to the middle plate (8) through a shock-absorbing mechanism. The shock-absorbing mechanism includes a central column (9) that runs through the center above the middle plate (8) and shock-absorbing cylinders (14) that are distributed around the central column (9). A sliding column (10) is slidably provided inside the central column (9). A base (11) is provided above the sliding column (10). The support column (12) is installed on the base (11). A sleeve (13) is sleeved on the outside of the central column (9). Shock-absorbing cylinders (14) are provided around the sleeve (13). A slider (15) is slidably provided in each set of shock-absorbing cylinders (14). A connecting rod (16) is hinged between the slider (15) and the base (11) and between the slider (15) and the middle plate (8).

3. A grounding installation device for a large photovoltaic plant area according to claim 1 or 2, characterized in that: A top rotating seat (19) is provided at the top of each support column (12). The top of the top rotating seat (19) is rotatably connected to the photovoltaic panel mounting bracket of the photovoltaic unit (20). A first gear (21) is provided on the rotating shaft of the photovoltaic panel mounting bracket. A second gear (22) meshes with the side of the first gear (21). The second gears (22) at the top of the same row of support columns (12) are all provided on the long rotating shaft (23). The long rotating shaft (23) is rotatably provided on the top rotating seat (19) of the same row of support columns (12). A driving mechanism is provided on the long rotating shaft (23).

4. A grounding device for photovoltaic module supports in a large photovoltaic factory area according to claim 1 or 2, characterized in that: The top of the grounding body (28) has a thread, and a nut (29) is screwed into the thread of the grounding body (28) and fixed to the middle plate (8) by the nut (29). The lower end of the grounding body (28) is provided with a spiral blade (2801). The grounding wire (26), the grounding ring (27) and the grounding body (28) are connected to form a grounding assembly.

5. A grounding device for photovoltaic module supports in a large photovoltaic factory area according to claim 1 or 2, characterized in that: The inner wall of the annular groove (201) is provided with four inner holes (202), and the middle plate (8) is provided with four sets of lock holes (801) around its perimeter.

6. A grounding device for photovoltaic module supports in a large photovoltaic factory area according to claim 1 or 2, characterized in that: The upper surface of the middle plate (8) is detachably provided with a protective cover (30).

7. A grounding device for photovoltaic module supports in a large photovoltaic factory area according to claim 2, characterized in that: The end of the shock absorber (14) is threaded with a screw (17), and a second spring (18) is connected between the slider (15) and the second spring (18).

8. A grounding device for photovoltaic module supports in a large photovoltaic factory area according to claim 3, characterized in that: The drive mechanism includes a speed regulator (24) and a handwheel (25). The output shaft of the speed regulator (24) is connected to a long rotating shaft (23), and the handwheel (25) is mounted on the input shaft of the speed regulator (24).

9. A grounding device for photovoltaic module supports in a large photovoltaic factory area according to claim 8, characterized in that: The handwheel (25) is replaced by a drive motor.

Images