A wind resistance protection device for a rooftop distributed photovoltaic power station

Abstract

The present invention relates to the technical field of photovoltaic power stations, and specifically discloses a wind-resistant protection device for a rooftop distributed photovoltaic power station, which is applied to a distributed photovoltaic power station. The distributed photovoltaic power station includes a photovoltaic rack and photovoltaic panels; the wind-resistant protection device includes: side plates; an annular guide groove provided on one side of the side plates; a primary protection member; a secondary protection member; a conveying assembly for driving the primary protection member and the secondary protection member to move along the annular guide groove; a wind sensor and a controller. When the wind force level is between T1 and T2, primary protection is triggered, and the primary protection member only covers and protects the photovoltaic panels to avoid damage to the photovoltaic panels caused by blown sand, gravel, etc., while ensuring the normal daylighting and power generation of the photovoltaic panels; when the wind force level exceeds T2, secondary protection is triggered, and the secondary protection member provides a full-range wrapping protection for the photovoltaic panels, and at the same time drives the anti-lifting member to seal the bottom of the photovoltaic panels to prevent the photovoltaic panels from being lifted or damaged by other objects.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power stations, and more specifically, it relates to a wind protection device for a rooftop distributed photovoltaic power station. Background Art

[0002] A photovoltaic power station is a power generation facility that uses photovoltaic modules to convert solar energy into electrical energy. Through the photovoltaic effect, the photovoltaic power station converts the photon energy in sunlight into current, thereby generating electricity. In a distributed photovoltaic power station installed on a rooftop, the photovoltaic panels, as an important component, generally need to be directly exposed to the environment because they need to receive sunlight. Since the surrounding of the photovoltaic power station is relatively open, when the environmental wind force is large, it may cause certain damage to the photovoltaic panels, resulting in some gravel or falling objects being blown onto the photovoltaic panels and smashing the surface of the photovoltaic panels. Most of the existing wind protection devices for photovoltaic panels directly wrap the photovoltaic panels, which is not convenient to flexibly trigger the wind protection measures according to the level of environmental wind force. This not only affects the normal daylighting and power generation efficiency of the photovoltaic panels, but also the protection effect needs to be improved. Summary of the Invention

[0003] In order to overcome the above technical problems, the present invention proposes a wind protection device for a rooftop distributed photovoltaic power station.

[0004] The object of the present invention can be achieved by the following technical solutions:

[0005] A wind protection device for a rooftop distributed photovoltaic power station, which is applied to a distributed photovoltaic power station. The distributed photovoltaic power station includes a photovoltaic rack and a plurality of groups of photovoltaic panels inclinedly installed on the photovoltaic rack;

[0006] The wind protection device includes:

[0007] Side plates, two groups of which are provided and symmetrically distributed on both sides of the photovoltaic rack;

[0008] Annular guide grooves, which are arranged on the side of the side plate facing the photovoltaic rack;

[0009] Primary protection members, which are arranged on the side plates and located on the side where the photovoltaic panels are inclined downward;

[0010] Secondary protection members, which are arranged on the side plates and located on the side where the photovoltaic panels are inclined upward;

[0011] Conveyor components, which are arranged on the side plates and used to drive the primary protection members and the secondary protection members to move along the annular guide grooves;

[0012] The wind protection device further includes:

[0013] A wind speed sensor, which is installed on the photovoltaic rack and used to detect the environmental wind speed;

[0014] A controller is arranged on the side plate and is used to obtain the current wind speed V measured by the wind sensor, and query the current wind force level T corresponding to the current wind speed V according to the preset wind speed - wind force level comparison table. When 0 ≤ T ≤ T1, it does not act. When T1 < T ≤ T2, it controls the conveying component to drive the first-level protection member to unfold and cover above the photovoltaic panel. When T > T2, it controls the conveying component to drive the second-level protection member to unfold and cover above the photovoltaic panel. Wherein, T1 is the first-level wind force level threshold, T2 is the second-level wind force level threshold, and 0 < T1 < T2, and both T1 and T2 are positive integers.

[0015] As a further solution of the present invention: The annular guide groove includes a horizontal section, a first vertical section, an inclined section, and a second vertical section that are spliced end to end. The first-level protection member is arranged at the first vertical section, the second-level protection member is arranged at the second vertical section, and the inclined section is located above the photovoltaic panel and has the same inclination as the photovoltaic panel.

[0016] As a further solution of the present invention: The conveying component includes a conveying chain arranged in the annular guide groove and a sprocket rotatably installed on the side plate. The sprocket is meshed with the conveying chain for driving. The path of the conveying chain is adapted to the contour of the annular guide groove, and a pushing block is fixed on the conveying chain. In the initial state, the pushing block is located in the horizontal section of the annular guide groove.

[0017] A transmission shaft is coaxially and fixedly connected between the sprockets on the two groups of side plates, and a conveying motor for driving the sprocket is fixedly installed on one group of side plates.

[0018] As a further solution of the present invention: The conveying component further includes a conveying chain guide rail fixed in the annular guide groove. A clamping groove adapted to the conveying chain is opened in the conveying chain guide rail, and a plurality of rollers are rotatably installed on the conveying chain, and the rollers are rollingly embedded in the clamping groove.

[0019] As a further solution of the present invention: The first-level protection member includes a winding drum arranged between the two groups of side plates. Both ends of the winding drum are rotatably installed on the corresponding side plates through rotating shafts, and a torsion spring is arranged at the connection between the rotating shaft and the side plate. A flexible transparent protection film is wound on the winding drum. One end of the flexible transparent protection film extends into the annular guide groove and is fixed with a first-level driving block, and a notch for the flexible transparent protection film to penetrate is opened on one side of the annular guide groove close to the winding drum.

[0020] As a further solution of the present invention: A first-level guiding wheel is arranged at the connection between the first vertical section and the inclined section. The first-level guiding wheel is rotatably installed on the side plate, and a first avoidance groove is opened on one side of the annular guide groove close to the first-level guiding wheel. The first-level guiding wheel penetrates through the first avoidance groove and extends into the annular guide groove.

[0021] As a further solution of the present invention: the secondary protection member includes a storage bin provided on the side plate, the storage bin is located on one side of the second vertical section of the annular guide groove, the storage bin is in communication with the second vertical section, and a plurality of foldable rigid magnetic protection plates are arranged in the storage bin, and adjacent rigid magnetic protection plates are rotatably connected by hinges;

[0022] The lowermost rigid magnetic protection plate is fixed to the bottom of the storage bin, and a connecting rod is rotatably connected to the uppermost rigid magnetic protection plate, and the end of the connecting rod is fixed with a secondary driving block extending into the annular guide groove.

[0023] As a further solution of the present invention: a folding driving member is arranged on the side of the second vertical section of the annular guide groove away from the storage bin, the folding driving member includes a chamber communicated with the annular guide groove, a lifting slide plate vertically slidably arranged in the chamber, and a cylinder fixedly installed on the lifting slide plate, a lead screw is rotatably installed in the chamber, the lead screw is threadedly connected with the lifting slide plate, and a lifting motor for driving the lead screw is fixedly installed on the outer wall of the chamber, and the extending end of the cylinder is connected with a folding push block.

[0024] As a further solution of the present invention: a secondary guide wheel is arranged at the junction of the second vertical section and the inclined section, the secondary guide wheel is rotatably installed on the side plate, a second avoidance groove is opened on one side of the annular guide groove close to the secondary guide wheel, and the secondary guide wheel penetrates through the second avoidance groove and extends into the annular guide groove;

[0025] The secondary guide wheel includes a wheel body, and a plurality of recessed parts are circumferentially and uniformly arranged on the wheel body, and the recessed parts are adapted to the rigid magnetic protection plates.

[0026] As a further solution of the present invention: it further includes an anti-lifting member, the anti-lifting member includes a sealing cover plate and a fixed pulley rotatably installed on the side plate, the sealing cover plate is adapted to the lower end surface of the photovoltaic panel, one end of the sealing cover plate is rotatably connected to the upwardly inclined side of the photovoltaic frame, and the other end of the sealing cover plate is connected with an elastic cable, and the end of the elastic cable away from the sealing cover plate bypasses the fixed pulley and is fixed to the secondary guide wheel.

[0027] The beneficial effects of the present invention:

[0028] The wind sensor detects the ambient wind speed in real time. The controller can judge the wind force level according to the magnitude of the ambient wind speed, and trigger the corresponding wind resistance actions according to the threshold range of the wind force level. When the wind force level is between T1 and T2, the first-level protection is triggered. The first-level protection component only covers and protects the photovoltaic panel to prevent damage to the photovoltaic panel caused by blown sand, gravel, etc., while ensuring the normal daylighting and power generation of the photovoltaic panel. When the wind force level exceeds T2, the second-level protection is triggered. The second-level protection component wraps and protects the photovoltaic panel in all directions, and at the same time drives the anti-lifting component to seal the bottom of the photovoltaic panel to prevent the photovoltaic panel from being lifted or damaged by other objects. Brief Description of the Drawings

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0031] Figure 2 is a three-dimensional schematic diagram of another perspective of the present invention;

[0032] Figure 3 is Figure 2 the enlarged view of part A in

[0033] Figure 4 is a side view of the present invention;

[0034] Figure 5 is a schematic structural diagram of the conveying chain guide rail in the present invention;

[0035] Figure 6 is a schematic structural diagram of the side plate in the present invention;

[0036] Figure 7 is Figure 6 the enlarged view of part B in

[0037] Figure 8 is a schematic structural diagram of the second-level protection component in the present invention;

[0038] Figure 9 is Figure 6 the enlarged view of part C in

[0039] Figure 10 is a schematic structural diagram of another perspective of the side plate in the present invention;

[0040] Figure 11 is Figure 10 the enlarged view of part D in

[0041] In the figure:

[0042] 100, photovoltaic frame; 110, photovoltaic panel;

[0043] 200, Side plate; 210, Annular guide groove; 221, Horizontal section; 222, First vertical section; 223, Inclined section; 224, Second vertical section; 220, Conveyor chain guide rail; 230, Conveyor chain; 231, Roller; 240, Pushing block; 250, Sprocket; 260, Conveyor motor; 270, Transmission shaft;

[0044] 300, Primary protection component; 310, Reel; 320, Flexible transparent protection film; 330, Primary drive block; 340, Notch;

[0045] 400, Secondary protection component; 410, Storage bin; 420, Rigid magnetic attraction protection plate; 430, Hinge; 440, Link; 450, Secondary drive block;

[0046] 500, Secondary guiding wheel; 510, Wheel body; 520, Depressed part;

[0047] 600, Anti-lifting component; 610, Sealing cover plate; 620, Fixed pulley; 630, Elastic cable;

[0048] 700, Primary guiding wheel;

[0049] 800, Folding drive component; 810, Chamber; 820, Lifting slide plate; 830, Lead screw; 840, Lifting motor; 850, Cylinder; 860, Folding push block;

[0050] 900, Controller; 910, Wind sensor. Detailed implementation manners

[0051] Now, the subject matter described herein will be discussed with reference to exemplary implementation manners. It should be understood that discussing these implementation manners is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the protection scope of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described for some examples can also be combined in other examples.

[0052] Please refer to Figure 1 and Figure 2 , The present invention discloses a wind resistance protection device for a rooftop distributed photovoltaic power station, which is applied to a distributed photovoltaic power station. The distributed photovoltaic power station includes a photovoltaic rack 100 and multiple groups of photovoltaic panels 110 inclinedly installed on the photovoltaic rack 100;

[0053] The wind protection device includes side plates 200, annular guide grooves 210, primary protection members 300, secondary protection members 400, and a conveying assembly; two groups of side plates 200 are provided and symmetrically distributed on both sides of the photovoltaic rack 100; the annular guide grooves 210 are arranged on the side of the side plates 200 facing the photovoltaic rack 100; the primary protection members 300 are arranged on the side plates 200 and on the side where the photovoltaic panel 110 slopes downward; the secondary protection members 400 are arranged on the side plates 200 and on the side where the photovoltaic panel 110 slopes upward; the conveying assembly is arranged on the side plates 200 and is used to drive the primary protection members 300 and the secondary protection members 400 to move along the annular guide grooves 210;

[0054] The wind protection device further includes a controller 900 and a wind sensor 910. The wind sensor 910 is installed on the photovoltaic rack 100 and is used to detect the ambient wind speed;

[0055] The controller 900 is arranged on the side plates 200 and is used to obtain the current wind speed V measured by the wind sensor 910, and query the current wind force level T corresponding to the current wind speed V according to a preset wind speed - wind force level comparison table; when 0 ≤ T ≤ T1, it does not act; when T1 < T ≤ T2, it controls the conveying assembly to drive the primary protection members 300 to unfold and cover above the photovoltaic panel 110; when T > T2, it controls the conveying assembly to drive the secondary protection members 400 to unfold and cover above the photovoltaic panel 110; where T1 is the threshold value of the primary wind force level, T2 is the threshold value of the secondary wind force level, and 0 < T1 < T2, both T1 and T2 are positive integers.

[0056] Specifically, the wind sensor 910 detects the ambient wind speed in real time. The controller 900 judges the wind force level according to the magnitude of the ambient wind speed and triggers corresponding wind protection actions according to the threshold range where the wind force level is located; when the wind force level corresponding to the ambient wind speed is less than or equal to T1, it means that the wind speed is small at this time and will not pose any threat to the photovoltaic panel 110, and the wind protection device does not need to trigger the protection action; when the wind force level corresponding to the ambient wind speed is between T1 and T2, it means that the wind speed is large at this time and can pose a certain threat to the photovoltaic panel 110. The controller 900 controls the conveying assembly to unfold the primary protection members 300 and cover them above the photovoltaic panel 110 to prevent the blown sand, gravel, etc. from damaging the photovoltaic panel 110. At the same time, the primary protection members 300 can allow sunlight to penetrate normally, so as not to affect the normal daylighting and power generation of the photovoltaic panel 110; when the wind force level corresponding to the ambient wind speed exceeds T2, it means that the wind speed is too large at this time and can pose a greater threat to the photovoltaic panel 110. The controller 900 controls the conveying assembly to unfold the secondary protection members 400 and cover them above the photovoltaic panel 110, so as to wrap and protect the photovoltaic panel 110 and prevent the photovoltaic panel 110 from being lifted or damaged by the surrounding falling objects.

[0057] It should be noted that the controller 900 can judge the wind force level according to the magnitude of the environmental wind speed, and trigger corresponding wind resistance actions according to the threshold range where the wind force level is located; when the wind force level is between T1 and T2, the first-level protection is triggered, and the first-level protection member 300 only covers and protects the photovoltaic panel 110, while ensuring the normal daylighting and power generation of the photovoltaic panel 110; when the wind force level exceeds T2, the second-level protection is triggered, and the second-level protection member 400 performs a full-range wrapping protection on the photovoltaic panel 110 to prevent the photovoltaic panel 110 from being lifted or damaged by other objects.

[0058] The above wind force levels can be set according to actual protection requirements. Specifically, they can be defined as follows:

[0059] Level 0: Calm, wind speed 0.0 - 0.2 m / s;

[0060] Level 1: Light air, wind speed 0.3 - 1.5 m / s;

[0061] Level 2: Light breeze, wind speed 1.6 - 3.3 m / s;

[0062] Level 3: Gentle breeze, wind speed 3.4 - 5.4 m / s;

[0063] Level 4: Moderate breeze, wind speed 5.5 - 7.9 m / s;

[0064] Level 5: Fresh breeze, wind speed 8.0 - 10.7 m / s;

[0065] Level 6: Strong breeze, wind speed 10.8 - 13.8 m / s;

[0066] Level 7: Near gale, wind speed 13.9 - 17.1 m / s;

[0067] Level 8: Gale, wind speed 17.2 - 20.7 m / s.

[0068] Among them, the wind speed detection accuracy is 0.1 m / s, T1 is level 5, and T2 is level 8.

[0069] In an embodiment, please refer to Figure 4 , the annular guide groove 210 includes a horizontal section 221, a first vertical section 222, an inclined section 223, and a second vertical section 224 that are spliced end to end. The first-level protection member 300 is arranged at the first vertical section 222, the second-level protection member 400 is arranged at the second vertical section 224, and the inclined section 223 is located above the photovoltaic panel 110 and has the same inclination as the photovoltaic panel 110;

[0070] Specifically, in the initial state, the primary protection member 300 and the secondary protection member 400 will not affect the normal daylighting of the photovoltaic panel 110; when the primary protection is triggered, the primary protection member 300 unfolds along the first vertical section 222 towards the inclined section 223, thereby covering the photovoltaic panel 110; when the secondary protection is triggered, the secondary protection member 400 unfolds along the second vertical section 224 towards the inclined section 223, thereby wrapping the photovoltaic panel 110.

[0071] Please refer to Figure 2 and Figure 3 As shown in FIGS. and, the conveying assembly includes a conveying chain 230 disposed in the annular guide groove 210 and a sprocket 250 rotatably mounted on the side plate 200. The sprocket 250 is in meshing transmission with the conveying chain 230; the path of the conveying chain 230 is adapted to the contour of the annular guide groove 210, and a pushing block 240 is fixed on the conveying chain 230;

[0072] In the initial state, the pushing block 240 is located in the horizontal section 221 of the annular guide groove 210;

[0073] A transmission shaft 270 is coaxially and fixedly connected between the sprockets 250 on the two groups of side plates 200, and a conveying motor 260 for driving the sprocket 250 is fixedly installed on one of the side plates 200;

[0074] By driving the sprockets 250 on both sides to rotate synchronously by the conveying motor 260, under the meshing transmission of the sprockets 250 and the conveying chain 230, the conveying chains 230 on both sides are driven to move synchronously along the annular guide groove 210, thereby driving the pushing block 240 to move, so as to drive the primary protection member 300 or the secondary protection member 400 to unfold.

[0075] Further, please refer to Figure 5 As shown in FIGS., considering the stability of the movement of the conveying chain 230, the conveying assembly further includes a conveying chain guide rail 220 fixed in the annular guide groove 210. A card slot adapted to the conveying chain 230 is formed in the conveying chain guide rail 220, and a plurality of rollers 231 are rotatably mounted on the conveying chain 230. The rollers 231 are rollingly embedded in the card slot;

[0076] The card slot on the conveying chain guide rail 220 is adaptively installed with the rollers 231 on the conveying chain 230, so as to limit the movement track of the conveying chain 230 by using the conveying chain guide rail 220, ensure the smooth operation of the conveying chain 230, and effectively avoid the conveying chain 230 from disengaging from the annular guide groove 210, and ensure the stability of the primary protection and secondary protection functions.

[0077] In yet another embodiment, please refer to Figure 6 and Figure 7, the primary protection member 300 includes a winding drum 310 disposed between two sets of side plates 200. Both ends of the winding drum 310 are rotatably mounted on the corresponding side plates 200 through rotating shafts, and a torsion spring (not shown in the figure) is provided at the connection between the rotating shaft and the side plate 200; a flexible transparent protective film 320 is wound around the winding drum 310. One end of the flexible transparent protective film 320 extends into the annular guide groove 210 and is fixed with a primary drive block 330. A notch 340 for the flexible transparent protective film 320 to penetrate is formed on one side of the annular guide groove 210 close to the winding drum 310;

[0078] In the initial state, due to the elastic force of the torsion spring, the winding drum 310 always winds up the flexible transparent protective film 320, thereby pulling the primary drive block 330 to abut against the notch 340. When the primary protection is triggered, the conveying motor 260 drives the conveying chain 230 to move through the sprocket 250, thereby driving the pushing block 240 to move along the horizontal section 221 towards the first vertical section 222 until the pushing block 240 contacts the primary drive block 330. Subsequently, the primary drive block 330 is pushed to move along the first vertical section 222 towards the inclined section 223, thereby pulling the flexible transparent protective film 320 out from the winding drum 310 and gradually unfolding it along the trajectory of the annular guide groove 210 until the flexible transparent protective film 320 is completely unfolded into the inclined section 223 to cover the upper part of the photovoltaic panel 110, avoiding damage to the photovoltaic panel 110 caused by falling gravel, and at the same time not affecting the normal daylighting of the photovoltaic panel 110;

[0079] When the wind force weakens and the primary protection is not required, the conveying motor 260 drives the conveying chain 230 to move in the reverse direction, so that the pushing block 240 returns to the horizontal section 221, and the flexible transparent protective film 320 can be re-wound onto the winding drum 310 under the action of the torsion spring, and at the same time drives the primary drive block 330 to reset to the first vertical section 222 to remove the covering effect of the flexible transparent protective film 320 on the photovoltaic panel 110.

[0080] It should be noted that the material of the flexible transparent protective film 320 is not limited, as long as it is a flexible light-transmitting material that can be wound and unfolded. Specifically, it can be made of polyvinyl chloride; in addition, although the flexible transparent protective film 320 can provide a protective effect on the photovoltaic panel 110 without affecting the normal daylighting of the photovoltaic panel 110, it will still affect the heat dissipation of the photovoltaic panel 110 to a certain extent. Therefore, when the wind force level is lower than T1, the primary protection is not started.

[0081] Further, please refer to Figure 6, in order to enable the flexible transparent protective film 320 to smoothly transition and unfold along the first vertical section 222 towards the inclined section 223, a first-level guiding wheel 700 is provided at the junction of the first vertical section 222 and the inclined section 223. The first-level guiding wheel 700 is rotatably installed on the side plate 200. A first avoidance groove is formed on one side of the annular guide groove 210 close to the first-level guiding wheel 700, and the first-level guiding wheel 700 penetrates through the first avoidance groove and extends into the annular guide groove 210;

[0082] When the flexible transparent protective film 320 transitions from the first vertical section 222 to the inclined section 223, the flexible transparent protective film 320 is in rolling contact with the first-level guiding wheel 700. On the one hand, the first-level guiding wheel 700 can reduce the resistance when the flexible transparent protective film 320 unfolds, and on the other hand, it can guide the flexible transparent protective film 320, so that the flexible transparent protective film 320 can complete a smooth transition at the junction of the first vertical section 222 and the inclined section 223.

[0083] Please refer to Figure 8 , the secondary protective member 400 includes a storage bin 410 provided on the side plate 200. The storage bin 410 is located on one side of the second vertical section 224 of the annular guide groove 210. The storage bin 410 is in communication with the second vertical section 224. A plurality of foldable rigid magnetic protection plates 420 are provided in the storage bin 410, and adjacent rigid magnetic protection plates 420 are rotatably connected by hinges 430;

[0084] The lowermost rigid magnetic protection plate 420 is fixed to the bottom of the storage bin 410, and the uppermost rigid magnetic protection plate 420 is rotatably connected with a connecting rod 440. The end of the connecting rod 440 is fixed with a secondary driving block 450 extending into the annular guide groove 210;

[0085] In the initial state, the rigid magnetic protection plates 420 are stacked in the storage bin 410 under the action of mutual magnetic attraction. When secondary protection is triggered, the conveying motor 260 drives the conveying chain 230 to move through the sprocket 250, thereby driving the pushing block 240 to move along the horizontal section 221 towards the second vertical section 224 until the pushing block 240 contacts the secondary driving block 450. Subsequently, the secondary driving block 450 is pushed to move along the second vertical section 224 towards the inclined section 223, so as to pull up the rigid magnetic protection plates 420 in sequence and gradually unfold them along the track of the annular guide groove 210 until the rigid magnetic protection plates 420 are completely unfolded into the inclined section 223 to wrap and protect the upper part of the photovoltaic panel 110;

[0086] When the wind force weakens and secondary protection is no longer required, the conveying motor 260 drives the conveying chain 230 to move in the reverse direction, causing the pushing block 240 to return to the horizontal section 221. The pushing block 240 no longer exerts a thrust on the secondary driving block 450. The second rigid magnetic attraction protection plate 420 adjacent to the bottommost rigid magnetic attraction protection plate 420 in the storage bin 410 can then be adsorbed and folded together with the bottommost rigid magnetic attraction protection plate 420 under the magnetic attraction effect. Subsequently, the third rigid magnetic attraction protection plate 420 continues to be adsorbed and folded with the second rigid magnetic attraction protection plate 420, and so on, so that each rigid magnetic attraction protection plate 420 is folded into the storage bin 410 under the interlocking effect;

[0087] It should be noted that when the pushing block 240 pushes the secondary driving block 450, the thrust generated by the pushing block 240 on the secondary driving block 450 is sufficient to overcome the magnetic attraction force between the rigid magnetic attraction protection plates 420, so that the rigid magnetic attraction protection plates 420 can be smoothly unfolded in sequence; and after the pushing block 240 releases the thrust on the secondary driving block 450, the magnetic attraction force between the adjacent rigid magnetic attraction protection plates 420 is sufficient to drive each group of rigid magnetic attraction protection plates 420 to overcome their own gravity and the friction force with the annular guide groove 210 for folding and resetting;

[0088] The material of the rigid magnetic attraction protection plate 420 is not limited. Specifically, the rigid magnetic attraction protection plate 420 can be a plate body made of stainless steel, and magnetic sheets that can attract each other are embedded on both end faces of the plate body.

[0089] Please refer to Figure 10 and Figure 11 . Considering the stability of the folding and resetting of the rigid magnetic attraction protection plate 420, a folding driving member 800 is provided on the side of the second vertical section 224 of the annular guide groove 210 facing away from the storage bin 410. The folding driving member 800 includes a chamber 810 communicating with the annular guide groove 210, a lifting slide plate 820 vertically slidably arranged in the chamber 810, and a cylinder 850 fixedly installed on the lifting slide plate 820. A lead screw 830 is rotatably installed in the chamber 810. The lead screw 830 is threadedly connected to the lifting slide plate 820. An elevating motor 840 for driving the lead screw 830 is fixedly installed on the outer wall of the chamber 810. The extending end of the cylinder 850 is connected with a folding push block 860;

[0090] Specifically, the lifting motor 840 drives the lead screw 830 to rotate, thereby driving the lifting slide plate 820 to move up and down, so as to realize the height adjustment of the folding push block 860; during the folding and resetting process of the rigid magnetic adsorption protection plate 420, the cylinder 850 drives the folding push block 860 to horizontally extend towards the storage bin 410, and the extended folding push block 860 is used to horizontally push and interfere with the rigid magnetic adsorption protection plate 420. The folding push block 860 is sequentially inserted between adjacent rigid magnetic adsorption protection plates 420, so that the rigid magnetic adsorption protection plate 420 can be smoothly folded into the storage bin 410. When the lower rigid magnetic adsorption protection plate 420 is successfully adsorbed and folded, the folding push block 860 moves up a certain distance and is inserted between the next group of adjacent rigid magnetic adsorption protection plates 420. By repeating this operation, the continuous storage and folding of the rigid magnetic adsorption protection plate 420 can be realized;

[0091] It should be noted that the folding push block 860 can not only cause the rigid magnetic adsorption protection plate 420 to fold, but also, after the lower rigid magnetic adsorption protection plate 420 folds, it can adaptively pull the unfolded rigid magnetic adsorption protection plate 420 above into the storage bin 410 in sequence, so as to realize the continuous folding and storage of the rigid magnetic adsorption protection plate 420; when the folding push block 860 is pushed to a certain included angle, the folding push block 860 can be horizontally withdrawn, and the two rigid magnetic adsorption protection plates 420 can be self-adsorbed under the action of magnetic attraction and gravity; when the cylinder 850 drives the folding push block 860 to completely retract into the chamber 810, the folding push block 860 will not interfere with the operation of the push block 240 and the rigid magnetic adsorption protection plate 420.

[0092] Further, please refer to Figure 6 and Figure 9 , in order to enable the rigid magnetic adsorption protection plate 420 to smoothly transition and unfold along the second vertical section 224 towards the inclined section 223, a secondary guide wheel 500 is provided at the junction of the second vertical section 224 and the inclined section 223. The secondary guide wheel 500 is rotatably installed on the side plate 200. A second avoidance groove is opened on one side of the annular guide groove 210 close to the secondary guide wheel 500, and the secondary guide wheel 500 passes through the second avoidance groove and extends into the annular guide groove 210;

[0093] The secondary guide wheel 500 includes a wheel body 510, and a plurality of recessed portions 520 are circumferentially and uniformly opened on the wheel body 510. The recessed portions 520 are adapted to the rigid magnetic adsorption protection plate 420;

[0094] When the rigid magnetic attraction protection plate 420 is successively unfolded, each rigid magnetic attraction protection plate 420 is successively snapped into the corresponding recessed part 520 of the wheel body 510, thereby driving the secondary conveying wheel 500 to rotate synchronously, so as to realize the guiding and transition of the rigid magnetic attraction protection plate 420. Due to the mutual snap-fit of the recessed part 520 and the rigid magnetic attraction protection plate 420, the misalignment and deviation of the rigid magnetic attraction protection plate 420 are effectively avoided, ensuring the smooth unfolding of the rigid magnetic attraction protection plate 420.

[0095] Furthermore, please refer to Figure 10 , considering that when the wind force level is relatively large, it is easy to generate a relatively large blowing force under the photovoltaic panel 110, causing the photovoltaic panel 110 to be lifted from the photovoltaic frame 100. For this reason, it further includes an anti-lifting member 600. The anti-lifting member 600 includes a sealing cover plate 610 and a fixed pulley 620 rotatably installed on the side plate 200. The sealing cover plate 610 is adapted to the lower end face of the photovoltaic panel 110. One end of the sealing cover plate 610 is rotatably connected to the upwardly inclined side of the photovoltaic frame 100. The other end of the sealing cover plate 610 is connected with an elastic cable 630. The end of the elastic cable 630 away from the sealing cover plate 610 bypasses the fixed pulley 620 and is fixedly connected to the secondary conveying wheel 500;

[0096] When the rigid magnetic attraction protection plate 420 is unfolded, it drives the secondary conveying wheel 500 to rotate synchronously. The secondary conveying wheel 500 pulls the elastic cable 630. As the elastic cable 630 is continuously tightened, the sealing cover plate 610 is pulled to rotate upward around its rotating shaft until the sealing cover plate 610 fits the lower end face of the photovoltaic panel 110, thereby hermetically covering the lower end face of the photovoltaic panel 110 and preventing a large blowing force from being generated on the lower end of the photovoltaic panel 110 when the wind force is relatively large, causing the photovoltaic panel 110 to be lifted.

[0097] It should be noted that since the stroke when the rigid magnetic attraction protection plate 420 is unfolded is inconsistent with the rotation stroke of the sealing cover plate 610, in order to avoid the situation that the sealing cover plate 610 has been flipped upward in place before the rigid magnetic attraction protection plate 420 is fully unfolded, the elastic cable 630 is provided. The elastic cable 630 has certain stretching performance, so that it can be stretched and deformed according to the actual situation to compensate for the problem of inconsistent strokes of the rigid magnetic attraction protection plate 420 and the sealing cover plate 610. When the rigid magnetic attraction protection plate 420 is fully unfolded, the elastic cable 630 can just pull the sealing cover plate 610 to completely fit the photovoltaic panel 110.

[0098] The specific implementation manners of this embodiment have been described above, but this embodiment is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A wind-resistant protection device for a rooftop distributed photovoltaic power station, applied to a distributed photovoltaic power station, the distributed photovoltaic power station comprising a photovoltaic rack (100) and a plurality of photovoltaic panels (110) obliquely mounted on the photovoltaic rack (100); It is characterized in that The wind protection device comprises: Side panels (200), which are provided in two groups and are symmetrically distributed on both sides of the photovoltaic frame (100); An annular guide groove (210) disposed on a side of the side plate (200) facing the photovoltaic frame (100); A primary protection member (300) is arranged on the side plate (200) and is located on a side of the photovoltaic panel (110) that is tilted downward; A secondary protection member (400) is arranged on the side plate (200) and is located on the upwardly inclined side of the photovoltaic panel (110); A conveying assembly, which is arranged on the side plate (200) and is used to drive the primary protection member (300) and the secondary protection member (400) to move along the annular guide groove (210); The wind protection device also includes: A wind sensor (910) is installed on the photovoltaic rack (100) and is used to detect the ambient wind speed; A controller (900) is arranged on the side plate (200) and is used to obtain the current wind speed V measured by the wind sensor (910), and query the current wind force level T corresponding to the current wind speed V according to a preset wind speed-wind force level comparison table; when 0≤T≤T1, no action is taken; when T1<T≤T2, the conveying component is controlled to drive the first-level protective member (300) to unfold and cover the photovoltaic panel (110); when T>T2, the conveying component is controlled to drive the second-level protective member (400) to unfold and cover the photovoltaic panel (110); wherein T1 is the first-level wind force level threshold, T2 is the second-level wind force level threshold, and 0<T1<T2, and T1 and T2 are both positive integers; The annular guide groove (210) comprises a horizontal section (221), a first vertical section (222), an inclined section (223) and a second vertical section (224) which are connected end to end to each other; the first-level protection member (300) is arranged at the first vertical section (222); the second-level protection member (400) is arranged at the second vertical section (224); the inclined section (223) is located above the photovoltaic panel (110) and has the same inclination as the photovoltaic panel (110); The conveying assembly comprises a conveying chain (230) arranged in the annular guide groove (210) and a sprocket (250) rotatably mounted on the side plate (200), wherein the sprocket (250) meshes with the conveying chain (230) for transmission; the path of the conveying chain (230) is adapted to the profile of the annular guide groove (210), and a push block (240) is fixed on the conveying chain (230); in an initial state, the push block (240) is located in the horizontal section (221) of the annular guide groove (210); A transmission shaft (270) is coaxially fixedly connected between the sprocket wheels (250) on the two sets of side plates (200), and a conveying motor (260) for driving the sprocket wheels (250) is fixedly mounted on one set of the side plates (200); The conveying assembly further comprises a conveying chain guide rail (220) fixed in the annular guide groove (210), a slot adapted to the conveying chain (230) being provided in the conveying chain guide rail (220), a plurality of rollers (231) being rotatably mounted on the conveying chain (230), and the rollers (231) being rollingly embedded in the slot.

2. A wind protection device for a rooftop distributed photovoltaic power station according to claim 1, characterized in that: The primary protective member (300) comprises a winding drum (310) arranged between two groups of side plates (200), the two ends of the winding drum (310) being rotatably mounted on the corresponding side plates (200) via a rotating shaft, and a coil spring being arranged at the connection between the rotating shaft and the side plates (200); a flexible transparent protective film (320) is wound on the winding drum (310), one end of the flexible transparent protective film (320) extends into the annular guide groove (210) and is fixed with a primary driving block (330), and a notch (340) for the flexible transparent protective film (320) to pass through is provided on a side of the annular guide groove (210) close to the winding drum (310).

3. A wind protection device for a rooftop distributed photovoltaic power station according to claim 2, characterized in that: A primary guide wheel (700) is provided at the junction of the first vertical section (222) and the inclined section (223); the primary guide wheel (700) is rotatably mounted on the side plate (200); a first avoidance groove is provided on a side of the annular guide groove (210) close to the primary guide wheel (700); the primary guide wheel (700) passes through the first avoidance groove and extends into the annular guide groove (210).

4. The wind-resistant protection device for a rooftop distributed photovoltaic power station according to claim 1, characterized in that: The secondary protection member (400) comprises a storage bin (410) arranged on the side plate (200), the storage bin (410) being located on one side of the second vertical section (224) of the annular guide groove (210), the storage bin (410) and the second vertical section (224) being communicated with each other, a plurality of groups of foldable rigid magnetic protection plates (420) being arranged in the storage bin (410), and adjacent rigid magnetic protection plates (420) being rotatably connected via hinges (430); The bottommost rigid magnetic protection plate (420) is fixed to the bottom of the storage bin (410), and the topmost rigid magnetic protection plate (420) is rotatably connected to a connecting rod (440), wherein a secondary driving block (450) extending into the annular guide groove (210) is fixed at the end of the connecting rod (440).

5. The wind-resistant protection device for a rooftop distributed photovoltaic power station according to claim 4 is characterized in that: A folding drive member (800) is provided on the side of the second vertical section (224) of the annular guide groove (210) facing away from the storage bin (410). The folding drive member (800) comprises a chamber (810) connected to the annular guide groove (210), a lifting slide plate (820) vertically slidably arranged in the chamber (810), and a cylinder (850) fixedly mounted on the lifting slide plate (820). A screw rod (830) is rotatably mounted in the chamber (810), and the screw rod (830) is threadedly connected to the lifting slide plate (820). A lifting motor (840) for driving the screw rod (830) is fixedly mounted on the outer wall of the chamber (810), and a folding push block (860) is connected to the protruding end of the cylinder (850).

6. The wind-resistant protection device for a rooftop distributed photovoltaic power station according to claim 4, characterized in that: A secondary guide wheel (500) is provided at the junction of the second vertical section (224) and the inclined section (223); the secondary guide wheel (500) is rotatably mounted on the side plate (200); a second avoidance groove is provided on a side of the annular guide groove (210) close to the secondary guide wheel (500); the secondary guide wheel (500) passes through the second avoidance groove and extends into the annular guide groove (210); The secondary guide wheel (500) comprises a wheel body (510), a plurality of recessed portions (520) being evenly provided on the circumference of the wheel body (510), the recessed portions (520) being adapted to fit the rigid magnetic protection plate (420).

7. The wind-resistant protection device for a rooftop distributed photovoltaic power station according to claim 6, characterized in that: The anti-lifting member (600) is also included. The anti-lifting member (600) includes a sealing cover plate (610) and a fixed pulley (620) rotatably mounted on the side plate (200). The sealing cover plate (610) is adapted to the lower end surface of the photovoltaic panel (110). One end of the sealing cover plate (610) is rotatably connected to an upwardly inclined side of the photovoltaic frame (100). The other end of the sealing cover plate (610) is connected to an elastic cable (630). The end of the elastic cable (630) away from the sealing cover plate (610) bypasses the fixed pulley (620) and is fixedly connected to the secondary guide wheel (500).

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