Method for sound attenuation of a photoelectrically controlled water tornado wind siphon system

Abstract

The application provides a method for sound reduction of a photoelectric control water tornado wind siphon system, which applies a sound reduction structure for sound reduction. The sound reduction structure is provided with a siphon tank, an inner cavity is arranged in the middle of the siphon tank, a submersible pump motor is arranged in the inner cavity, a sealing cover is arranged at the upper end of the siphon tank, a water outlet is arranged on the sealing cover and communicates with the water delivery end of the submersible pump motor, a water inlet pipe is communicated with the inner cavity, and an outer cavity is arranged around the outer cavity. The steps of applying the sound reduction structure for sound reduction are as follows: liquid is filled into the outer cavity until the pressure of the liquid in the outer cavity reaches a set range. According to the application, the outer cavity is filled with liquid, the liquid can absorb noise, the noise generated by the operation of the submersible pump motor is greatly weakened in the process of being transmitted to the outside, and the disturbance to the public and noise pollution are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric water control, in particular to a method for sound reduction of a photoelectric water control tornado siphon system. BACKGROUND

[0002] The photoelectric water control system uses a solar photoelectric booster pipe network to supply water, solving the problem of insufficient pressure in traditional mains water supply. Agricultural irrigation does not require personnel to guard at the field, and water can be controlled through the pipeline water network, realizing remote solar water supply. In the existing photoelectric water control system, a submersible pump motor is usually arranged in the negative pressure tank or siphon tank, and the submersible pump motor is driven in the working process to use the tornado principle to pump out the water at the bottom of the negative pressure tank or siphon tank to realize remote and overall control of water across regions. However, in the existing photoelectric water control system, the connection between the submersible pump motor and the siphon tank will produce sound during driving, and the siphon tank will produce a large amount of noise under the action of the siphon tank similar to a "power amplifier", which will disturb the public and cause noise pollution. SUMMARY

[0003] The present application aims to at least solve one of the above technical problems in the related art to some extent. To this end, the present application provides a method for sound reduction of a photoelectric water control tornado siphon system, which fills the outer cavity with liquid, which can absorb noise, greatly weakening the noise generated by the operation of the submersible pump motor during its transmission to the outside, avoiding disturbance to the public and noise pollution.

[0004] The technical solution of the present application is as follows:

[0005] The method for sound reduction of a photoelectric water control tornado siphon system uses a sound reduction structure for sound reduction, the sound reduction structure is provided with a siphon tank, an inner cavity is arranged in the middle of the siphon tank, a submersible pump motor is arranged in the inner cavity, a sealing cover is arranged at the upper end of the siphon tank, a water outlet is arranged on the sealing cover and communicates with the water outlet end of the submersible pump motor, a water inlet pipe is communicated with the inner cavity, and an outer cavity is arranged around the inner cavity; the steps of using the sound reduction structure for sound reduction are as follows: filling liquid into the outer cavity until the pressure of the liquid in the outer cavity reaches a set range.

[0006] Further, an inner bottom wall of the outer cavity is provided with a pressure sensor, the pressure sensor is electrically connected with an indicator light, the pressure sensor is used for detecting the pressure of the liquid filled into the outer cavity, and after detecting that the pressure of the liquid filled into the outer cavity reaches the set range, the pressure sensor transmits a signal to the indicator light to emit light, so as to prompt the operator to accurately add liquid.

[0007] Further, a through hole is arranged in the upper end of the siphon tank, the water delivery end of the submersible pump motor is connected in the through hole, and a sealing ring is arranged between the water delivery end of the submersible pump motor and the inner wall of the through hole.

[0008] Further, the liquid is a sound-absorbing liquid.

[0009] Further, the upper end of the siphon tank is provided with a liquid adding pipe communicated with the outer cavity, and a cover is detachably and sealingly connected to the opening of the liquid adding pipe.

[0010] Further, the lower end of the siphon tank is provided with a liquid discharging pipe communicated with the outer cavity, and a manual valve is arranged on the liquid discharging pipe to control the opening and closing of the liquid discharging pipe.

[0011] Further, the upper end of the siphon tank is provided with a pressure relief valve communicated with the inner cavity.

[0012] Further, the water outlet end of the water inlet pipe is higher than the water inlet end of the submersible pump motor.

[0013] Further, the sound-absorbing structure further comprises a solar cell panel assembly, the solar cell panel assembly is electrically connected with an electric control cabinet, the electric control cabinet is electrically connected with the submersible pump motor, and the submersible pump motor is a variable frequency motor.

[0014] Further, the solar panel assembly comprises a support frame, the upper ends of the left and right sides of the support frame are respectively rotationally connected with a first solar panel and a second solar panel, the upper ends of the front and back sides of the support frame are respectively rotationally connected with a third solar panel and a fourth solar panel; the upper end of the support frame is provided with a first rotating shaft arranged in the left-right direction, the first rotating shaft is driven by a second motor, the first rotating shaft is provided with a first winding disc, the first winding disc is wound with a first pull rope, the other end of the first pull rope is connected with the fourth solar panel; the front end of the first rotating shaft is arranged in the left-right direction and provided with a second rotating shaft, the first rotating shaft is provided with a first gear, the second rotating shaft is provided with a second gear engaged with the first gear, the second rotating shaft is provided with a second winding disc, the second winding disc is wound with a second pull rope, the other end of the second pull rope is connected with the third solar panel; the left side of the upper end of the support frame is arranged in the front-back direction and provided with a third rotating shaft, the third rotating shaft is provided with a first bevel gear, the left end of the second rotating shaft is provided with a second bevel gear engaged with the first bevel gear, the third rotating shaft is provided with a third winding disc, the third winding disc is wound with a third pull rope, the other end of the third pull rope is connected with the first solar panel; the right side of the upper end of the support frame is arranged in the front-back direction and provided with a fourth rotating shaft, the fourth rotating shaft is provided with a third bevel gear, the right end of the first rotating shaft is provided with a fourth bevel gear engaged with the third bevel gear, the fourth rotating shaft is provided with a fourth winding disc, the fourth winding disc is wound with a fourth pull rope, the other end of the fourth pull rope is connected with the second solar panel.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The present application forms a double-cavity structure in the siphon tank by arranging an outer cavity around the inner cavity, fills the outer cavity with liquid, and sets the pressure of the liquid in the outer cavity to a certain range, so that the noise generated during the operation of the submersible pump motor is absorbed by the liquid in the outer cavity after it spreads to the outer cavity, thereby greatly weakening the noise that spreads to the outside (at this time, the noise generated during operation can only be transmitted to the outside through the gap between the water outlet of the submersible pump motor and the siphon tank), avoiding the phenomenon of excessive noise causing disturbance and noise pollution; at the same time, the pressure of the liquid in the outer cavity reaches the set range, and the liquid has a certain tension, so the liquid is in close contact with the inner wall of the outer cavity, thereby effectively preventing the liquid from being affected by the noise and causing fluctuations during the absorption of noise, thereby further effectively preventing the phenomenon of excessive noise causing disturbance and noise pollution. The sealing cover arranged at the upper end of the siphon tank can further improve the noise reduction effect due to the small gap between the sealing cover and the upper end of the siphon tank.

[0017] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the attendant drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The foregoing and / or additional aspects and advantages of the present application are achieved by providing an optical-electricity controlled water tornado wind siphon system, which comprises a siphon tank, a water inlet pipe, a water outlet pipe, a liquid adding pipe, a liquid discharging pipe, a pressure sensor, an indicator light, a pressure relief valve, a water pump motor, a sealing cover, a sealing ring, and an electric control cabinet.

[0019] Figure 1 Structure diagram of the soundproof structure used in the first embodiment of the soundproof method of the optical-electricity controlled water tornado wind siphon system of the present application;

[0020] Figure 2 Structure diagram of the soundproof structure used in the second embodiment of the soundproof method of the optical-electricity controlled water tornado wind siphon system of the present application;

[0021] Figure 3 Structure diagram of the solar cell panel assembly of the present application. Figure 2 Structure diagram of the solar cell panel assembly of the present application.

[0022] Reference signs:

[0023] 100 siphon tank, 110 inner cavity, 120 water pump motor, 130 sealing cover, 131 water outlet, 140 water inlet pipe, 150 outer cavity, 160 through hole, 170 sealing ring, 180 liquid adding pipe, 181 sealing cover, 190 liquid discharging pipe, 191 manual valve;

[0024] 210 pressure sensor, 220 indicator light;

[0025] 300 pressure relief valve;

[0026] 400 solar cell panel assembly, 410 support frame, 420 first cell panel, 430 second cell panel, 440 third cell panel, 450 fourth cell panel, 461 first rotating shaft, 462 second motor, 463 first winding disc, 464 first pull rope, 465 first gear, 466 fourth bevel gear, 471 second rotating shaft, 472 second gear, 473 second winding disc, 474 second pull rope, 475 second bevel gear, 481 third rotating shaft, 482 first bevel gear, 483 third winding disc, 484 third pull rope, 491 fourth rotating shaft, 492 third bevel gear, 493 fourth winding disc, 494 fourth pull rope;

[0027] 500 electric control cabinet. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be described in detail below, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part of the description, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the orientation description, such as "up", "down", "front", "back", "left", "right" and the like, indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the purpose of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the description of the present application, if "first", "second" and the like are described, they are only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0031] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0032] Example 1

[0033] Reference Figure 1As shown, the method for sound reduction of the photoelectric control water tornado siphon system according to the embodiment of the application applies the sound reduction structure for sound reduction, the sound reduction structure is provided with a siphon tank 100, an inner cavity 110 is arranged in the middle of the siphon tank 100, a submersible pump motor 120 is arranged in the inner cavity 110, a sealing cover 130 is arranged at the upper end of the siphon tank 100, a water outlet 131 in communication with the water delivery end of the submersible pump motor 120 is arranged on the sealing cover 130, the inner cavity 110 is communicated with a water inlet pipe 140, and an outer cavity 150 is arranged around the outer cavity 110; the steps of applying the sound reduction structure for sound reduction are as follows: liquid is filled into the outer cavity 150 until the pressure of the liquid in the outer cavity 150 reaches a set range. Compared with the prior art, the embodiment of the application forms a double-cavity structure in the siphon tank 100 by arranging the outer cavity 150 around the outer cavity 110, and the liquid in the outer cavity 150 is filled until the pressure of the liquid in the outer cavity 150 reaches a set range, so that the noise generated during the operation of the submersible pump motor 120 is absorbed by the liquid in the outer cavity 150 after being diffused to the position of the outer cavity 150, thereby greatly weakening the noise transmitted to the outside (at this time, the noise generated during the operation can only be transmitted to the outside through the gap between the water delivery end of the submersible pump motor 120 and the siphon tank 100), avoiding the phenomenon of excessive noise causing disturbance and noise pollution; at the same time, the pressure of the liquid in the outer cavity 150 reaches a set range, and because the liquid has a certain tension, the liquid is in close contact with the inner wall of the outer cavity 150, thereby effectively avoiding the liquid from being affected by the noise and generating fluctuations and other noises during the absorption of the noise, and further avoiding the phenomenon of excessive noise causing disturbance and noise pollution. The sealing cover 130 is arranged at the upper end of the siphon tank 100, and the gap between the sealing cover 130 and the upper end surface of the siphon tank 100 is small, which can further improve the sound reduction effect. Through actual test, the noise transmitted to the outside from the siphon tank 100 of the existing photoelectric control water system without the sound reduction structure reaches 65 to 80 decibels, and the noise transmitted to the outside from the siphon tank 100 after the sound reduction structure is installed can be reduced to below 20 decibels. It can be understood that the submersible pump set includes a submersible electric pump and a submersible motor, and the submersible electric pump and the submersible motor are integrated into the submersible pump motor 120

[0034] As Figure 1As shown, preferably, the inner bottom wall of the outer cavity 150 is provided with a pressure sensor 210, the pressure sensor 210 is electrically connected with an indicator light 220, the pressure sensor 210 is used to detect the pressure of the liquid filled into the outer cavity 150, during the process that the operator fills the liquid into the outer cavity 150, when the pressure sensor 210 detects that the pressure of the liquid filled into the outer cavity 150 reaches the set range, a signal is transmitted to control the indicator light 220 to emit light, so as to prompt the operator to stop filling the liquid into the outer cavity 150, and ensure that the pressure of the liquid in the outer cavity 150 reaches the set range, so that the liquid basically fills the space of the outer cavity 150, thereby effectively avoiding that the liquid is affected by the noise to produce fluctuations during the process of absorbing the noise, thereby further effectively reducing the noise.

[0035] Preferably, considering that after the liquid is filled into the outer cavity 150 for noise reduction treatment, the noise generated by the operation of the submersible pump motor 120 can only be transmitted to the outside from the gap between the water delivery end of the submersible pump motor 120 and the connection of the siphon tank 100, in order to further improve the effect of noise reduction, a through hole 160 is arranged in the upper end of the siphon tank 100 in the embodiment of the application, the upper end of the siphon tank 100 is provided with the through hole 160, the water delivery end of the submersible pump motor 120 is connected in the through hole 160, and a sealing ring 170 is arranged between the water delivery end of the submersible pump motor 120 and the inner wall of the through hole 160. The sealing ring 170 further reduces the gap between the water delivery end of the submersible pump motor 120 and the connection of the siphon tank 100, thereby further improving the effect of noise reduction.

[0036] Preferably, the liquid is a noise reduction liquid. Compared with ordinary liquid, the noise reduction liquid has better noise reduction effect, and the size of the outer cavity 150 can be further reduced under the premise of ensuring the noise reduction effect.

[0037] Preferably, the upper end of the siphon tank 100 is provided with a liquid filling pipe 180 in communication with the outer cavity 150, and a cover 181 is detachably and sealingly connected to the opening of the liquid filling pipe 180. The liquid filling pipe 180 can be used to conveniently fill the liquid into the outer cavity 150; meanwhile, the opening of the liquid filling pipe 180 is sealed by the cover 181 after the liquid filling is completed, so as to avoid reducing the noise absorption effect of the liquid. It can be understood that the cover 181 is detachably and sealingly connected to the opening of the liquid filling pipe 180 in a threaded connection or buckling manner.

[0038] Further preferably, the lower end of the siphon tank 100 is provided with a liquid discharge pipe 190 in communication with the outer cavity 150, and a manual valve 191 is arranged on the liquid discharge pipe 190 to control the opening and closing of the liquid discharge pipe 190. After a period of use, the noise reduction effect of the original liquid in the outer cavity 150 decreases, the manual valve 191 can be opened to discharge the original liquid from the liquid discharge pipe 190, and then new liquid can be filled into the liquid filling pipe 180, so as to ensure the noise reduction effect.

[0039] Preferably, in order to avoid the siphon tank 100 damage caused by excessive pressure in the inner cavity 110, the present embodiment is provided with a pressure relief valve 300 at the upper end of the siphon tank 100, which is in communication with the inner cavity 110.

[0040] Preferably, the water outlet end of the water inlet pipe 140 is higher than the water inlet end of the submersible pump motor 120. It ensures that the water drawn from the water inlet pipe 140 can be fully delivered to other areas through the action of the submersible pump motor 120.

[0041] Embodiment 2

[0042] Referring to Figure 2 and Figure 3 The difference between the present embodiment and the embodiment is that the sound insulation structure further comprises a solar panel assembly 400, the solar panel assembly 400 is electrically connected with an electric control cabinet 500, the electric control cabinet 500 is electrically connected with the submersible pump motor 120, and the submersible pump motor 120 is set as a variable frequency motor. The solar panel assembly 400 converts solar energy into electric energy to supply power to the entire photoelectric control water system, reducing the wiring of external power supply; due to the difference in intensity of solar energy at different time periods, the electric energy converted by the solar panel assembly 400 from solar energy is different, resulting in fluctuations in the electric energy provided to the electric control cabinet 500, and the current output to the submersible pump motor 120 after the corresponding voltage conversion of the electric control cabinet 500 fluctuates, the submersible pump motor 120 is set as a variable frequency motor, and the submersible pump motor 120 can adapt to the corresponding frequency conversion according to the size of the current output to the submersible pump motor 120 by the electric control cabinet 500, thereby prolonging the service life of the submersible pump motor 120; and can avoid the situation that when the size of the current output to the submersible pump motor 120 by the electric control cabinet 500 fluctuates, the submersible pump motor 120 cannot perform corresponding frequency conversion, resulting in greater noise.

[0043] Preferably, the solar panel assembly 400 comprises a support frame 410, the left and right upper ends of the support frame 410 are respectively rotatably connected with a first panel 420 and a second panel 430, the front and rear upper ends of the support frame 410 are respectively rotatably connected with a third panel 440 and a fourth panel 450; the upper end of the support frame 410 is provided with a first rotating shaft 461 arranged in the left-right direction, the first rotating shaft 461 is driven by a second motor 462, the first rotating shaft 461 is provided with a first winding disc 463, the first winding disc 463 is wound with a first pull rope 464, the other end of the first pull rope 464 is connected with the fourth panel 450; the front end of the first rotating shaft 461 is arranged in the left-right direction and provided with a second rotating shaft 471, the first rotating shaft 461 is provided with a first gear 465, the second rotating shaft 471 is provided with a second gear 472 engaged with the first gear 465, the second rotating shaft 471 is provided with a second winding disc 473, the second winding disc 473 is wound with a second pull rope 474, the other end of the second pull rope 474 is connected with the third panel 440; the left side of the upper end of the support frame 410 is arranged in the front-rear direction and provided with a third rotating shaft 481, the third rotating shaft 481 is provided with a first bevel gear 482, the left end of the second rotating shaft 471 is provided with a second bevel gear 475 engaged with the first bevel gear 482, the third rotating shaft 481 is provided with a third winding disc 483, the third winding disc 483 is wound with a third pull rope 484, the other end of the third pull rope 484 is connected with the first panel 420; the right side of the upper end of the support frame 410 is arranged in the front-rear direction and provided with a fourth rotating shaft 491, the fourth rotating shaft 491 is provided with a third bevel gear 492, the right end of the first rotating shaft 461 is provided with a fourth bevel gear 466 engaged with the third bevel gear 492, the fourth rotating shaft 491 is provided with a fourth winding disc 493, the fourth winding disc 493 is wound with a fourth pull rope 494, the other end of the fourth pull rope 494 is connected with the second panel 430. When power generation is needed, the second motor 462 rotates in the forward direction to drive the first rotating shaft 461 to rotate, through the meshing transmission of the first gear 465 and the second gear 472, the first rotating shaft 461 and the second rotating shaft 471 rotate in the reverse direction synchronously, at the same time, through the meshing transmission of the first bevel gear 482 and the second bevel gear 475 and the meshing transmission of the third bevel gear 492 and the fourth bevel gear 466, when the second motor 462 is started to rotate in the forward direction, the first rotating shaft 461, the second rotating shaft 471, the third rotating shaft 481 and the fourth rotating shaft 491 rotate synchronously, through the first winding disc 463, the second winding disc 473, the third winding disc 483 and the fourth winding disc 493, the first pull rope 464, the second pull rope 474, the third pull rope 484 and the fourth pull rope 494 are wound simultaneously, so that the fourth panel 450, the third panel 440, the first panel 420 and the second panel 430 are respectively rotated upward to the horizontal state, so that each panel can better contact with sunlight to absorb solar energy for photoelectric conversion with maximum efficiency.When power generation is not required, the second motor 462 reverses to drive the first rotating shaft 461, the second rotating shaft 471, the third rotating shaft 481 and the fourth rotating shaft 491 to rotate synchronously, the first pull rope 464, the second pull rope 474, the third pull rope 484 and the fourth pull rope 494 are simultaneously unwound, thereby the fourth solar panel 450, the third solar panel 440, the first solar panel 420 and the second solar panel 430 are rotated downward to the side wall of the support frame 410, the unfolded area of each solar panel is reduced, the solar panel assembly 400 is stored, which can avoid greater noise generated by friction with the wind when the wind at night, and can avoid damage to the solar panel when the wind is strong at night. It can be understood that the first solar panel 420, the second solar panel 430, the third solar panel 440 and the fourth solar panel 450 are square panels, and the first solar panel 420, the second solar panel 430, the third solar panel 440 and the fourth solar panel 450 are rotatably connected to the upper end of the side wall of the support frame 410 by hinges, hinges or other connecting structures. The first gear 465 and the second gear 472 are the same gears.

[0044] The above only the preferred embodiment of the present application, and not to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A method for noise reduction in a photoelectric controlled water tornado siphon system, characterized in that, Noise reduction is achieved using a silencing structure. This structure includes a siphon tank with an inner cavity in the center. A submersible pump motor is housed within this inner cavity. A sealing cap is located at the top of the siphon tank, and an outlet on the cap connects to the water supply end of the submersible pump motor. An inlet pipe connects to the inner cavity. An outer cavity surrounds the inner cavity, creating a double-cavity structure within the siphon tank. The steps for using this silencing structure are as follows: Liquid is filled into the outer cavity until its pressure reaches a set range. This ensures that the liquid in the outer cavity absorbs most of the noise generated by the submersible pump motor as it diffuses outwards to the outer cavity.

2. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, A pressure sensor is installed on the inner bottom wall of the outer cavity. The pressure sensor is electrically connected to an indicator light. The pressure sensor is used to detect the pressure of the liquid filled into the outer cavity. After detecting that the pressure of the liquid filled into the outer cavity reaches a set range, it transmits a signal to the indicator light to illuminate, so as to prompt the operator to add liquid accurately.

3. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, The upper end of the siphon tank is provided with a through hole, the water delivery end of the submersible pump motor is connected to the through hole, and a sealing ring is provided between the water delivery end of the submersible pump motor and the inner wall of the through hole.

4. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, The liquid used is a sound-absorbing liquid.

5. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, The upper end of the siphon tank is provided with a filling pipe that communicates with the outer cavity, and the opening of the filling pipe is detachably and sealed with a cap.

6. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 4, characterized in that, The lower end of the siphon tank is provided with a drain pipe that communicates with the outer cavity, and a manual valve is provided on the drain pipe to control the opening and closing of the drain pipe.

7. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, The upper end of the siphon tank is equipped with a pressure relief valve that communicates with the inner cavity.

8. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, The outlet end of the inlet pipe is higher than the inlet end of the submersible pump motor.

9. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 1, characterized in that, The noise reduction structure also includes a solar panel assembly, which is electrically connected to an electrical control cabinet. The electrical control cabinet is electrically connected to the submersible pump motor, which is configured as a variable frequency motor.

10. The method for noise reduction of the photoelectric controlled water tornado siphon system according to claim 9, characterized in that, The solar panel assembly includes a support frame. A first solar panel and a second solar panel are rotatably connected to the upper left and right sides of the support frame, respectively. A third solar panel and a fourth solar panel are rotatably connected to the upper front and rear sides of the support frame, respectively. A first rotating shaft arranged in a left-right direction is provided at the upper end of the support frame. The first rotating shaft is driven by a second motor and has a first take-up reel wound around it. A first pull rope is wound around the first take-up reel, and the other end of the first pull rope is connected to the fourth solar panel. A second rotating shaft is arranged in a left-right direction in front of the first rotating shaft. A first gear is provided on the first rotating shaft, and a second gear meshing with the first gear is provided on the second rotating shaft. A second take-up reel is provided on the second rotating shaft, and a second pull rope is wound around it. The other end of the second pull rope is connected to the third battery panel; a third rotating shaft is arranged along the front-back direction on the left side of the upper end of the support frame, a first bevel gear is provided on the third rotating shaft, a second bevel gear meshing with the first bevel gear is provided at the left end of the second rotating shaft, a third take-up reel is provided on the third rotating shaft, a third pull rope is wound on the third take-up reel, and the other end of the third pull rope is connected to the first battery panel; a fourth rotating shaft is arranged along the front-back direction on the right side of the upper end of the support frame, a third bevel gear is provided on the fourth rotating shaft, a fourth bevel gear meshing with the third bevel gear is provided at the right end of the first rotating shaft, a fourth take-up reel is provided on the fourth rotating shaft, a fourth pull rope is wound on the fourth take-up reel, and the other end of the fourth pull rope is connected to the second battery panel.

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