An external protection device for solar photovoltaic panels

Abstract

The present invention discloses an external protection device for a solar photovoltaic panel, belonging to the technical field of photovoltaic panel protection. It includes a base device, and the bottom device is used to sense rainwater. There are two protection devices arranged on the base device, and the protection devices are used to protect the photovoltaic panel. A rain shielding device is arranged on the protection device, and the rain shielding device is used to shield rainwater for the photovoltaic panel. The retraction mechanism provided by the present invention can retract the rainwater sensor and the light sensor when rainwater is detected, preventing the sensors from being damaged due to long-term exposure to rainwater. The protection device provided by the present invention drives the lower protection plate to rise and the flip protection plate to rotate when the rainwater sensor detects rainwater, protecting the surface of the photovoltaic panel and preventing the photovoltaic panel from being damaged by heavy rain. The rain shielding device is synchronously started when the rainwater sensor detects rainwater, and the surface of the photovoltaic panel is covered with cowhide cloth. The three protection methods are driven by the same power source. It has a high degree of automation and good protection effect.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic panel protection, and particularly relates to an external protection device for solar photovoltaic panels. Background Art

[0002] A solar photovoltaic panel (or photovoltaic module) is a device that converts sunlight into electrical energy. Photovoltaic cells are its core components, usually made of silicon materials, including types such as monocrystalline silicon, polycrystalline silicon, and thin-film silicon. They convert light energy into direct current through the photovoltaic effect. The solar protection panel can generate electricity when there is sunlight, but it cannot generate electricity during heavy rain. Usually, when the rain is heavy, the solar panel may be damaged. Especially in areas with frequent heavy rains, a photovoltaic panel protection device is needed to protect the photovoltaic panel. The existing solar photovoltaic panel protection devices mainly protect the photovoltaic panel through an external box, but they usually cannot be opened automatically when it is not raining, and at the same time, the sensors for detecting rain are easily damaged when exposed outside for a long time. Summary of the Invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: an external protection device for solar photovoltaic panels, including a base device. The base device includes a bottom plate and a rotating plate. The base device is used to sense rainwater. There are two protection devices arranged on the base device. The protection device includes a side frame, and the side frame is fixedly installed on the rotating plate. The protection device is used to protect the photovoltaic panel. A rain shielding device is arranged on the protection device. The rain shielding device includes a top frame, and the top frame is fixed on the side frame. The rain shielding device is used to shield rainwater for the photovoltaic panel.

[0004] Further, the base device includes a vertical rod fixedly installed on the bottom plate, a bottom rotating rod rotatably installed on the bottom plate, a rotating frame rotatably installed on the vertical rod, the rotating frame is rotatably installed with the bottom rotating rod, a rotating plate is fixedly installed on the rotating frame, and a horizontal rail is fixedly installed on the rotating frame.

[0005] Further, a retracting mechanism is arranged on the horizontal rail. The retracting mechanism includes a sliding frame slidably installed on the horizontal rail. A sensor seat is fixedly installed on the sliding frame. A rain sensor and a light sensor are fixedly installed on the sensor seat. A sliding rod is fixedly installed on the sliding frame. An outer pushing plate and an inner pushing plate are slidably installed on the sliding rod. A sliding rod spring is arranged between the outer pushing plate and the sliding frame, and a sliding rod spring is arranged between the inner pushing plate and the sliding frame. An outer rotating rod is rotatably installed on the outer pushing plate, and an inner rotating rod is rotatably installed on the inner pushing plate. A lifting block is rotatably installed on the outer rotating rod, and the lifting block is rotatably installed with the inner rotating rod. An outer push rod is slidably installed on the outer pushing plate, and an outer spring is arranged between the outer push rod and the outer pushing plate. An inner push rod is slidably installed on the inner pushing plate, and a push rod spring is arranged between the inner push rod and the inner pushing plate. The elastic forces of the outer spring and the push rod spring are less than the elastic force of the sliding rod spring.

[0006] Further, a pin mechanism is arranged on the lifting block. The pin mechanism includes a lifting column fixedly installed on the lifting block, and a plug pin is fixedly installed on the lifting column. A transverse groove, an inner end pin hole and an outer end pin hole are arranged on the rotating frame. In the initial state, the plug pin is located in the outer end pin hole.

[0007] By using bottom rotating rods with different lengths, the inclination angle of the rotating plate can be changed. In the initial state, the plug pin is inserted into the outer end pin hole. At this time, both the rain sensor and the light sensor are located outside. When the rain sensor detects rainy weather, the outer pushing block starts to move towards the outer push rod. Since the plug pin is located in the outer end pin hole at this time, the outer push rod slides along the outer push plate, the outer push plate slides along the sliding rod, the outer spring and the sliding rod spring are compressed, and the outer rotating rod rotates, thereby driving the lifting block and the lifting column to rise, thereby driving the plug pin to rise. The plug pin leaves the outer end pin hole. Subsequently, the outer spring rebounds, and the outer pushing block continues to push the outer push plate through the outer push rod. Since the plug pin has been pulled out of the outer end pin hole at this time, the sliding frame is pushed to slide along the transverse rail, and the plug pin slides in the transverse groove. When the outer pushing block pushes the outer push plate through the outer push rod and the plug pin reaches the inner end pin hole, at this time, the sliding rod spring rebounds, causing the inner rotating rod to rotate, thereby driving the lifting block and the lifting column to descend, thereby driving the plug pin to be inserted into the inner end pin hole. At this time, the descending of the lifting block drives the outer rotating rod to rotate, driving the outer push plate to slide leftward along the outer push rod, and the outer spring is compressed. At this time, the flip protection plate is just horizontal, and the cowhide cloth just covers the photovoltaic panel. When the light sensor detects sunlight, the vertical rod reverses, and the plug pin is pushed back from the inner end pin hole to the outer end pin hole by the inner pushing block in the same principle, so that the rain sensor and the light sensor extend out, and the flip protection plate opens, and the cowhide cloth leaves above the photovoltaic panel.

[0008] Further, the protection device includes a protection motor fixedly installed on the side frame. A lower wheel is fixedly installed on the motor shaft of the protection motor. A vertical transmission belt is wound around the lower wheel. A lifting plate is fixedly installed on the vertical transmission belt. An ascending plate is fixedly installed on the lifting plate. A vertical sliding column is fixedly installed on the side frame. The ascending plate is slidably installed with the vertical sliding column. A lower protection plate is fixedly installed on the ascending plate.

[0009] Further, a flip cover mechanism is arranged on the ascending plate. The flip cover mechanism includes a lifting sliding column slidably installed on the ascending plate. A top plate is fixedly installed on the lifting sliding column. A sliding column spring is arranged between the top plate and the ascending plate. A flip rod is rotatably installed on the top plate. A flip protection plate is rotatably installed on the flip rod. The flip protection plate is rotatably installed with the lower protection plate.

[0010] When the rain sensor detects rain, the protection motor rotates to drive the lower wheel to rotate, thereby driving the vertical transmission belt to rotate, and at the same time driving the upper wheel to rotate. The vertical transmission belt drives the lifting plate to rise, thereby driving the rising plate and the lower protection plate to rise along the vertical sliding column, thereby driving the top plate to rise. When the top plate contacts the top frame, the rising plate and the lower protection plate continue to rise. At this time, the lifting sliding column slides along the rising plate, and the sliding column spring is compressed, thereby driving the flipping protection plate to rotate relative to the lower protection plate, and at the same time driving the flipping rod to rotate, so that the flipping protection plate finally rotates 90 degrees. The two flipping protection plates will reach above the photovoltaic panel to protect the photovoltaic panel.

[0011] Further, the rain shielding device includes a driving roller and a driven roller rotatably installed on the top frame. Sprockets are provided on the driving roller and the driven roller. Three protection transmission belts are wound around the sprockets of the driving roller and the driven roller. A photovoltaic panel is fixedly installed on the top frame. A upper wheel is fixedly installed on the driving roller. A vertical transmission belt is wound around the upper wheel and the lower wheel.

[0012] Further, an outer pushing block and an inner pushing block are fixedly installed on the middle protection transmission belt, and a cowhide cloth is fixedly installed between the outer protection transmission belt and the middle protection transmission belt.

[0013] The rotation of the upper wheel drives the driving roller to rotate, thereby driving the protection transmission belt to move, thereby driving the outer pushing block and the inner pushing block to move. At the same time, the protection transmission belt drives the cowhide cloth to move, so that the cowhide cloth reaches above the photovoltaic panel to shield the photovoltaic panel.

[0014] The beneficial effects of the present invention compared with the prior art are: (1) The retracting mechanism provided by the present invention can retract the rain sensor and the light sensor when rain is detected, preventing the sensors from being damaged due to long-term exposure to rain; (2) The protection device provided by the present invention drives the lower protection plate to rise and the flipping protection plate to rotate when the rain sensor detects rain, protecting the surface of the photovoltaic panel to prevent the photovoltaic panel from being damaged by heavy rain; (3) The rain shielding device provided by the present invention is synchronously started when the rain sensor detects rain, and uses the cowhide cloth to cover the surface of the photovoltaic panel to prevent the photovoltaic panel from being damaged due to a large amount of water ingress. The three protection methods are driven by the same power source, with high automation and good protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention (open state).

[0016] Figure 2 It is a schematic diagram of the overall structure of the present invention (protection state).

[0017] Figure 3 It is a schematic diagram of the structure of the base device of the present invention Figure 1 。

[0018] Figure 4 This is a schematic structural diagram of the retracting mechanism of the present invention.

[0019] Figure 5 For the present invention Figure 4 A partial enlarged schematic view at position A in the present invention.

[0020] Figure 6 This is a schematic structural diagram of the pin mechanism of the present invention.

[0021] Figure 7 This is a schematic structure of the protection device of the present invention Figure 1 .

[0022] Figure 8 This is a schematic structure of the protection device of the present invention Figure 2 .

[0023] Figure 9 This is a schematic structure of the protection device of the present invention Figure 3 .

[0024] Figure 10 This is a schematic structure of the rain protection device of the present invention Figure 1 .

[0025] Figure 11 This is a schematic structure of the rain protection device of the present invention Figure 2 .

[0026] Figure 12 This is a schematic structure of the rain protection device of the present invention Figure 3 .

[0027] Reference numerals in the drawings: 101 - bottom plate; 102 - vertical rod; 103 - bottom rotating rod; 104 - rotating plate; 105 - rotating frame; 106 - horizontal rail; 107 - sliding frame; 108 - sensor base; 109 - rain sensor; 110 - light sensor; 111 - outer push plate; 112 - inner push plate; 113 - sliding rod; 114 - sliding rod spring; 115 - outer rotating rod; 116 - inner rotating rod; 117 - lifting block; 118 - lifting column; 119 - pin; 120 - horizontal groove; 121 - inner end pin hole; 122 - outer end pin hole; 123 - outer push rod; 124 - outer spring; 125 - inner push rod; 126 - push rod spring; 201 - side frame; 202 - protection motor; 203 - lower wheel; 204 - vertical transmission belt; 205 - lifting plate; 206 - vertical sliding column; 207 - rising plate; 208 - lifting sliding column; 209 - sliding column spring; 210 - top plate; 211 - flipping rod; 212 - lower protection plate; 213 - flipping protection plate; 301 - top frame; 302 - photovoltaic panel; 303 - driving roller; 304 - upper wheel; 305 - driven roller; 306 - protection transmission belt; 307 - cowhide cloth; 308 - outer push block; 309 - inner push block. Detailed implementation manners

[0028] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0029] Embodiment: Refer to Figures 1 - 12 , an external protection device for a solar photovoltaic panel, including a base device. The base device includes a bottom plate 101 and a rotating plate 104. The base device is used to sense rainwater. Two protection devices are provided on the base device. The protection device includes a side frame 201, and the side frame 201 is fixedly installed on the rotating plate 104. The protection device is used to protect the photovoltaic panel. A rain shielding device is provided on the protection device. The rain shielding device includes a top frame 301, and the top frame 301 is fixed on the side frame 201. The rain shielding device is used to shield rainwater for the photovoltaic panel.

[0030] As Figures 3 - 6 shown, the base device includes a vertical rod 102 fixedly installed on the bottom plate 101. A bottom rotating rod 103 is rotatably installed on the bottom plate 101. A rotating frame 105 is rotatably installed on the vertical rod 102. The rotating frame 105 is rotatably installed with the bottom rotating rod 103. A rotating plate 104 is fixedly installed on the rotating frame 105. A horizontal rail 106 is fixedly installed on the rotating frame 105.

[0031] As Figures 3 - 6 shown, a retracting mechanism is provided on the horizontal rail 106. The retracting mechanism includes a sliding frame 107 slidably installed on the horizontal rail 106. A sensor seat 108 is fixedly installed on the sliding frame 107. A rain sensor 109 and a light sensor 110 are fixedly installed on the sensor seat 108. A sliding rod 113 is fixedly installed on the sliding frame 107. An outer pushing plate 111 and an inner pushing plate 112 are slidably installed on the sliding rod 113. A sliding rod spring 114 is provided between the outer pushing plate 111 and the sliding frame 107. A sliding rod spring 114 is provided between the inner pushing plate 112 and the sliding frame 107. An outer rotating rod 115 is rotatably installed on the outer pushing plate 111. An inner rotating rod 116 is rotatably installed on the inner pushing plate 112. A lifting block 117 is rotatably installed on the outer rotating rod 115. The lifting block 117 is rotatably installed with the inner rotating rod 116. An outer push rod 123 is slidably installed on the outer pushing plate 111. An outer spring 124 is provided between the outer push rod 123 and the outer pushing plate 111. An inner push rod 125 is slidably installed on the inner pushing plate 112. A push rod spring 126 is provided between the inner push rod 125 and the inner pushing plate 112. The elastic forces of the outer spring 124 and the push rod spring 126 are less than the elastic force of the sliding rod spring 114.

[0032] As Figures 3 - 6 shown, a pin mechanism is provided on the lifting block 117. The pin mechanism includes a lifting column 118 fixedly installed on the lifting block 117. A pin 119 is fixedly installed on the lifting column 118. A horizontal groove 120, an inner end pin hole 121 and an outer end pin hole 122 are provided on the rotating frame 105. In the initial state, the pin 119 is located in the outer end pin hole 122.

[0033] By using bottom rotating rods 103 with different lengths, the tilt angle of the rotating plate 104 can be changed. In the initial state, the bolt 119 is inserted into the outer end pin hole 122. At this time, both the rain sensor 109 and the light sensor 110 are located outside. When the rain sensor 109 detects rainy weather, the outer push block 308 starts to move towards the outer push rod 123. Since the bolt 119 is located in the outer end pin hole 122 at this time, the outer push rod 123 slides along the outer push plate 111, the outer push plate 111 slides along the sliding rod 113, the outer spring 124 and the sliding rod spring 114 are compressed, and the outer rotating rod 115 rotates, thereby driving the lifting block 117 and the lifting column 118 to rise, thus driving the bolt 119 to rise. The bolt 119 leaves the outer end pin hole 122. Subsequently, the outer spring 124 rebounds, and the outer push block 308 continues to push the outer push plate 111 through the outer push rod 123. Since the bolt 119 has been pulled out of the outer end pin hole 122 at this time, the sliding frame 107 is pushed to slide along the horizontal rail 106, and the bolt 119 slides in the horizontal groove 120. When the outer push block 308 pushes the outer push plate 111 through the outer push rod 123 and the bolt 119 reaches the inner end pin hole 121, at this time, the sliding rod spring 114 rebounds, causing the inner rotating rod 116 to rotate, thereby driving the lifting block 117 and the lifting column 118 to descend, thus driving the bolt 119 to be inserted into the inner end pin hole 121. At this time, the descent of the lifting block 117 drives the outer rotating rod 115 to rotate, driving the outer push plate 111 to slide leftward along the outer push rod 123, and the outer spring 124 is compressed. At this time, the flipping protection plate 213 is just horizontal, and the cowhide cloth 307 just covers the photovoltaic panel 302. When the light sensor 110 detects sunlight, the vertical rod 102 reverses, and the bolt 119 is pushed back from the inner end pin hole 121 to the outer end pin hole 122 by the inner push block 309 in the same principle, so that the rain sensor 109 and the light sensor 110 extend out, and the flipping protection plate 213 opens, and the cowhide cloth 307 leaves above the photovoltaic panel 302.

[0034] As Figures 7 - 9 As shown, the protection device includes a protection motor 202 fixedly installed on the side frame 201. A lower wheel 203 is fixedly installed on the motor shaft of the protection motor 202. A vertical transmission belt 204 is wound around the lower wheel 203. A lifting plate 205 is fixedly installed on the vertical transmission belt 204. An ascending plate 207 is fixedly installed on the lifting plate 205. A vertical sliding column 206 is fixedly installed on the side frame 201. The ascending plate 207 is slidably installed with the vertical sliding column 206. A lower protection plate 212 is fixedly installed on the ascending plate 207.

[0035] As Figures 7 - 9As shown, a flip mechanism is provided on the rising plate 207. The flip mechanism includes a lifting slide column 208 slidably mounted on the rising plate 207. A top plate 210 is fixedly mounted on the lifting slide column 208. A slide column spring 209 is provided between the top plate 210 and the rising plate 207. A flip rod 211 is rotatably mounted on the top plate 210. A flip protection plate 213 is rotatably mounted on the flip rod 211. The flip protection plate 213 is rotatably mounted with the lower protection plate 212.

[0036] When the rain sensor 109 detects rain, the protection motor 202 rotates to drive the lower wheel 203 to rotate, thereby driving the vertical transmission belt 204 to rotate. At the same time, it drives the upper wheel 304 to rotate. The vertical transmission belt 204 drives the lifting plate 205 to rise, thereby driving the rising plate 207 and the lower protection plate 212 to rise along the vertical slide column 206, thereby driving the top plate 210 to rise. When the top plate 210 contacts the top frame 301, the rising plate 207 and the lower protection plate 212 continue to rise. At this time, the lifting slide column 208 slides along the rising plate 207, and the slide column spring 209 is compressed, thereby driving the flip protection plate 213 to rotate relative to the lower protection plate 212. At the same time, it drives the flip rod 211 to rotate, so that the flip protection plate 213 finally rotates 90 degrees. The two flip protection plates 213 will reach above the photovoltaic panel 302 to protect the photovoltaic panel 302.

[0037] As Figures 10 - 12 As shown, the rain protection device includes a driving roller 303 and a driven roller 305 rotatably mounted on the top frame 301. Sprockets are provided on the driving roller 303 and the driven roller 305. Three protection transmission belts 306 are wound around the sprockets of the driving roller 303 and the driven roller 305. A photovoltaic panel 302 is fixedly mounted on the top frame 301. An upper wheel 304 is fixedly mounted on the driving roller 303. A vertical transmission belt 204 is wound around the upper wheel 304 and the lower wheel 203.

[0038] As Figures 10 - 12 As shown, an outer push block 308 and an inner push block 309 are fixedly mounted on the middle protection transmission belt 306. A cowhide cloth 307 is fixedly mounted between the outer protection transmission belt 306 and the middle protection transmission belt 306.

[0039] The rotation of the upper wheel 304 drives the driving roller 303 to rotate, thereby driving the protection transmission belt 306 to move, thereby driving the outer push block 308 and the inner push block 309 to move. At the same time, the protection transmission belt 306 drives the cowhide cloth 307 to move, so that the cowhide cloth 307 reaches above the photovoltaic panel 302 to shield the photovoltaic panel 302.

[0040] The working principle of a hardness detection device for stainless steel angle steel disclosed in the present invention is as follows: By using bottom rotating rods 103 of different lengths, the inclination angle of the rotating plate 104 can be changed. In the initial state, the insertion pin 119 is inserted into the outer end pin hole 122. At this time, both the rain sensor 109 and the light sensor 110 are located outside. When the rain sensor 109 detects rainy weather, the protection motor 202 rotates to drive the lower wheel 203 to rotate, thereby driving the vertical transmission belt 204 to rotate, and at the same time driving the upper wheel 304 to rotate. The vertical transmission belt 204 drives the lifting plate 205 to rise, thereby driving the rising plate 207 and the lower protection plate 212 to rise along the vertical sliding column 206, thereby driving the top plate 210 to rise. When the top plate 210 contacts the top frame 301, the rising plate 207 and the lower protection plate 212 continue to rise. At this time, the lifting sliding column 208 slides along the rising plate 207, and the sliding column spring 209 is compressed, thereby driving the flipping protection plate 213 to rotate relative to the lower protection plate 212, and at the same time driving the flipping rod 211 to rotate, so that the flipping protection plate 213 finally rotates ninety degrees, and the two flipping protection plates 213 will reach above the photovoltaic panel 302 to protect the photovoltaic panel 302. The upper wheel 304 rotates to drive the driving roller 303 to rotate, thereby driving the protection transmission belt 306 to move, thereby driving the outer pushing block 308 and the inner pushing block 309 to move. At the same time, the protection transmission belt 306 drives the kraft cloth 307 to move, so that the kraft cloth 307 reaches above the photovoltaic panel 302 to block the photovoltaic panel 302.The extrapolation block 308 starts to move towards the outer push rod 123. Since the pin 119 is located in the outer end pin hole 122 at this time, the outer push rod 123 slides along the outer push plate 111, the outer push plate 111 slides along the sliding rod 113, the outer spring 124 and the sliding rod spring 114 are compressed, and the outer rotating rod 115 rotates, thereby driving the lifting block 117 and the lifting column 118 to rise, thus driving the pin 119 to rise, and the pin 119 leaves the outer end pin hole 122. Subsequently, the outer spring 124 rebounds, and the extrapolation block 308 continues to push the outer push plate 111 through the outer push rod 123. Since the pin 119 has been pulled out of the outer end pin hole 122 at this time, the sliding frame 107 is pushed to slide along the cross rail 106, and the pin 119 slides in the cross groove 120. When the extrapolation block 308 pushes the outer push plate 111 through the outer push rod 123 and the pin 119 reaches the inner end pin hole 121, at this time the sliding rod spring 114 rebounds, causing the inner rotating rod 116 to rotate, thereby driving the lifting block 117 and the lifting column 118 to descend, thus driving the pin 119 to be inserted into the inner end pin hole 121. At this time, the descent of the lifting block 117 drives the outer rotating rod 115 to rotate, driving the outer push plate 111 to slide leftward along the outer push rod 123, and the outer spring 124 is compressed. At this time, the flip protection plate 213 is just horizontal, and the cowhide cloth 307 just covers the photovoltaic panel 302. When the light sensor 110 detects sunlight, the vertical rod 102 rotates in reverse, and the pin 119 is pushed back from the inner end pin hole 121 to the outer end pin hole 122 by the inner push block 309 in the same principle, so that the rain sensor 109 and the light sensor 110 extend out, and the flip protection plate 213 opens, and the cowhide cloth 307 leaves above the photovoltaic panel 302.

[0041] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope of the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An external protection device for a solar photovoltaic panel, comprising a base device, characterized in that: The base device comprises a bottom plate (101) and a rotating plate (104), the base device is used to sense rain, two protective devices are arranged on the base device, the protective device comprises a side frame (201), the side frame (201) is fixedly mounted on the rotating plate (104), the protective device is used to protect the photovoltaic panel, a rain shielding device is arranged on the protective device, the rain shielding device comprises a top frame (301), the top frame (301) is fixed on the side frame (201), and the rain shielding device is used to shield the photovoltaic panel from rain; The protection device comprises a protection motor (202) fixedly mounted on the side frame (201); a lower wheel (203) is fixedly mounted on the motor shaft of the protection motor (202); a vertical transmission belt (204) is wound around the outer side of the lower wheel (203); a lifting plate (205) is fixedly mounted on the vertical transmission belt (204); a rising plate (207) is fixedly mounted on the lifting plate (205); a vertical sliding column (206) is fixedly mounted on the side frame (201); the rising plate (207) is slidably mounted on the vertical sliding column (206); and a lower protection plate (212) is fixedly mounted on the rising plate (207); The rain shield device comprises an active roller (303) and a driven roller (305) rotatably mounted on a top frame (301); sprockets are arranged on the active roller (303) and the driven roller (305); three protective transmission belts (306) are wound around the sprockets of the active roller (303) and the driven roller (305); a photovoltaic panel (302) is fixedly mounted on the top frame (301); an upper wheel (304) is fixedly mounted on the active roller (303); and a vertical transmission belt (204) is wound around the upper wheel (304) and the lower wheel (203); The base device comprises a vertical pole (102) fixedly mounted on a bottom plate (101), a bottom rotating rod (103) rotatably mounted on the bottom plate (101), a rotating frame (105) rotatably mounted on the vertical pole (102), the rotating frame (105) and the bottom rotating rod (103) rotatably mounted, a rotating plate (104) fixedly mounted on the rotating frame (105), and a horizontal rail (106) fixedly mounted on the rotating frame (105); The cross rail (106) is provided with a retracting mechanism, and the retracting mechanism comprises a sliding frame (107) slidably mounted on the cross rail (106), a sensor seat (108) fixedly mounted on the sliding frame (107), a rain sensor (109) and a light sensor (110) fixedly mounted on the sensor seat (108), a sliding rod (113) fixedly mounted on the sliding frame (107), an outer push plate (111) and an inner push plate (112) slidably mounted on the sliding rod (113), a sliding rod spring (114) is provided between the outer push plate (111) and the sliding frame (107), a sliding rod spring (114) is provided between the inner push plate (112) and the sliding frame (107), and the outer push plate An outer rotating rod (115) is rotatably mounted on the outer push plate (111), an inner rotating rod (116) is rotatably mounted on the inner push plate (112), a lifting block (117) is rotatably mounted on the outer rotating rod (115), the lifting block (117) and the inner rotating rod (116) are rotatably mounted, an outer push rod (123) is slidably mounted on the outer push plate (111), an outer spring (124) is arranged between the outer push rod (123) and the outer push plate (111), an inner push rod (125) is slidably mounted on the inner push plate (112), a push rod spring (126) is arranged between the inner push rod (125) and the inner push plate (112), and the elastic force of the outer spring (124) and the push rod spring (126) is smaller than the elastic force of the slide rod spring (114); The rising plate (207) is provided with a flip mechanism, and the flip mechanism comprises a lifting slide column (208) slidably mounted on the rising plate (207), a top plate (210) fixedly mounted on the lifting slide column (208), a slide column spring (209) being provided between the top plate (210) and the rising plate (207), a flip rod (211) being rotatably mounted on the top plate (210), a flip protection plate (213) being rotatably mounted on the flip rod (211), and the flip protection plate (213) being rotatably mounted on the lower protection plate (212).

2. The external protection device for solar photovoltaic panels according to claim 1, characterized in that: The lifting block (117) is provided with a pin mechanism, the pin mechanism comprising a lifting column (118) fixedly mounted on the lifting block (117), a latch (119) fixedly mounted on the lifting column (118), a transverse groove (120), an inner end pin hole (121) and an outer end pin hole (122) being provided on the rotating frame (105), and in an initial state, the latch (119) is located in the outer end pin hole (122).

3. The external protection device for solar photovoltaic panels according to claim 1, characterized in that: An outward push block (308) and an inward push block (309) are fixedly mounted on the middle protective transmission belt (306), and a cowhide cloth (307) is fixedly mounted between the outer protective transmission belt (306) and the middle protective transmission belt (306).

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