Large-area efficient washing and protecting device for photovoltaic roof of ecological gallery bridge

Abstract

The invention discloses an ecological gallery bridge photovoltaic roof large-area efficient cleaning and protecting device which is used for cleaning and maintaining ecological gallery bridge solar photovoltaic panels and comprises a moving device, an air blowing device, a jet flow device and a pumping device, and the jet flow device is arranged at the tops of the solar photovoltaic panels and used for spraying, blowing and drying the solar photovoltaic panels; the two moving devices are arranged on the two sides of the solar photovoltaic panel respectively and used for moving the blower device, the jet flow device and the supply box. The blower device is arranged on the upper edge of the solar photovoltaic panel, and the upper and lower ends are respectively connected with the moving device and the jet device; the pumping device is arranged at the bottom of the solar photovoltaic panel, is connected with the jet flow device and the moving device and provides cleaning agents and clean water for the jet flow device. The blowing device is introduced to achieve blowing drying maintenance of the photovoltaic panel, and the cold air mode and the hot air mode can be switched according to seasonal changes to control the temperature of the photovoltaic panel within the normal use range.

Description

Technical Field

[0001] The present invention belongs to the field of photovoltaic science and technology of sponge city ecological corridors, and specifically relates to a large-area and efficient cleaning and protection device for the photovoltaic roof of an ecological corridor. Background Art

[0002] Since the formation of human society, its development has been inseparable from energy, an important material guarantee. Since the reserves of mineral fuels on the earth are limited, it is imperative to explore diversified ways to utilize renewable resources. As an ideal renewable and clean energy, solar energy has been widely used in recent years under the gradual development and mature scientific and technological environment of photovoltaic power generation technology. Specifically in the field of infrastructure construction, the photovoltaic roof structure organically combines photovoltaic power generation technology with building functions, meeting the requirements of building use while effectively utilizing solar energy, providing a feasible solution for the development of a low-carbon economy.

[0003] The core of photovoltaic power generation technology is that solar photovoltaic panels absorb solar energy and convert it into electrical energy and store it in chemical batteries as energy reserves to continuously provide electricity to humans when needed. Therefore, how to ensure the high conversion efficiency of solar photovoltaic panels is crucial. On the one hand, by studying new solar photovoltaic panel materials, the energy conversion efficiency can be improved from the microstructure level; on the other hand, the actual use environment of solar photovoltaic panels can be improved to ensure that solar photovoltaic panels can operate stably in a suitable living space for a long time, which indirectly improves the energy conversion efficiency. The most important part is to clean and maintain solar photovoltaic panels in a timely manner. In actual use, solar photovoltaic panels are exposed to the air for a long time, which makes them prone to erosion by dust, animal feces, and harmful gases in the air. At the least, the energy conversion efficiency of solar photovoltaic panels is reduced, and at the worst, the structural damage of solar photovoltaic panels makes them unusable, which greatly increases the cost of using solar photovoltaic panels. Therefore, it is necessary to clean and maintain the photovoltaic panels regularly.

[0004] At present, the main method of cleaning and maintenance of photovoltaic panels is manual cleaning. First of all, this type of cleaning has certain safety hazards. Secondly, the cleaning efficiency fluctuates greatly due to the influence of seasonal climate. The severe summer and cold winter put forward high requirements on the staff and equipment, and the cleaning cost is high. Finally, manual large-scale flushing of large-area photovoltaic flat roofs with clean water is easy to cause waste of water resources. At the same time, due to the small slope of the flat roof, gravity alone cannot quickly discharge the sewage on the surface of the photovoltaic panel. Although wiping with manpower or equipment has a certain effect, both are easy to damage the surface structure of the photovoltaic panel, and the wiping tools need to be replaced regularly, and the photovoltaic panels cannot be effectively maintained according to seasonal changes.

[0005] Therefore, there is an urgent need for a large-area, high-efficiency, low-carbon cleaning and maintenance device for photovoltaic roofs. Summary of the invention

[0006] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a large-area and efficient cleaning and maintenance device for an ecological corridor photovoltaic roof, which can efficiently and low-carbon clean and maintain large-area photovoltaic panels.

[0007] The technical solution adopted by the present invention is:

[0008] A large-area and efficient cleaning and maintenance device for an ecological bridge photovoltaic roof is used for cleaning and maintaining an ecological bridge solar photovoltaic panel (1), characterized in that it comprises a moving device, an air blowing device, a jet device and a pumping device, wherein the jet device is arranged on the top of the solar photovoltaic panel (1) for spraying, blowing and drying the solar photovoltaic panel (1); the moving device is provided with two sets, which are arranged on both sides of the solar photovoltaic panel (1) for moving the air blowing device, the jet device and the supply box (10); the air blowing device is arranged on the upper edge of the solar photovoltaic panel (1), and the upper and lower ends are respectively connected to the moving device and the jet device; the pumping device is arranged at the bottom of the solar photovoltaic panel (1), respectively connected to the jet device and the moving device and provides detergent and clean water to the jet device.

[0009] Furthermore, the blowing device comprises a blower (12), a control valve (14), a semicircular welding part (13) and a first threaded opening (15); the control valve (14) is arranged on the threaded pipe section where the first threaded opening (15) is located; a fan (18) is arranged inside the blower (12); a thermal resistance wire (19) and a ventilation hole (3) are arranged on the front and rear sides of the fan (18), respectively; the semicircular welding part (13) and the first threaded opening (15) are arranged on the front and rear ends of the blower (12), respectively; the blower (12) is rotatably fixed to the end thread of the jet device through the first threaded opening (15).

[0010] Specifically, the setting of the ventilation hole 3 can increase the air intake of the blower and improve the blowing effect. At the same time, the fan 18 and the thermal resistor 19 are set, which can intelligently switch the cold air or hot air mode to provide a wind source for the jet pipe 21. The control valve 14 is used to close the blower pipeline during the first round of cleaning to prevent clean water and detergent from entering the blower and causing damage to the blower, while ensuring that the cleaning work is carried out safely and efficiently. The threaded mouth 15 at the end of the control valve 14 is rotatably fixed to the threaded tube 16 at the end of the jet device, and the semicircular welding piece 13 at the upper end of the blower is welded and fixed to the nut 4. The power of the upper transmission device is transmitted downward to the jet device through the blowing device, driving the jet device to move left and right.

[0011] Furthermore, the pumping device comprises a centrifugal pump (23), a supply box (10) and a connecting ring (2), and the centrifugal pump (23) and the supply box (10) are connected via the connecting ring (2).

[0012] Furthermore, the moving device comprises a first moving device and a second moving device, the first moving device comprises a first threaded rod (25), a first stepping motor (6) and a first nut (4), the second moving device comprises a second threaded rod (26), a second stepping motor (7) and a second nut (27), the output end of the first stepping motor (6) is transmission-connected to the first threaded rod (25), the output end of the first stepping motor (7) is transmission-connected to the second threaded rod (26), the first stepping motor (6) and the second stepping motor (7) respectively rotate the first threaded rod ( 25) and a second threaded rod (26) for driving the blowing device, the jet device and the supply box (10) to move along the surface of the solar photovoltaic panel (1); the first nut (4) and the blower (12) are welded and fixed via the semicircular welding piece (13), the first nut (4) and the first threaded rod (25) are connected via an internal ball bearing, the second nut (27) and the supply box (10) are welded and fixed via a connecting ring (2), and the second nut (27) and the second threaded rod (26) are connected via an internal ball bearing to drive the supply box (10) to move left and right.

[0013] Furthermore, the semicircular welding piece (13) has a semicircular groove structure, and the semicircular groove structure is clamped on the first threaded rod (25) and is welded and fixed to the first nut (4).

[0014] Furthermore, the connecting ring (2) comprises an annular channel (24) and a first threaded pipe (9) and a pipe mouth (8) which are connected to each other and are arranged on the outer side wall of the annular channel (24); the annular channel (24) is sleeved on the second threaded rod (26) and is welded and fixed to the second nut (27); the pipe mouth (8) is connected to the centrifugal pump (23) through a water pipe, and the first threaded mouth (9) is connected to the jet device.

[0015] Furthermore, the jet device comprises a jet pipe (21), on which a plurality of nozzles (22) are arranged at intervals in a direction toward the solar photovoltaic panel (1), and a second threaded tube (16) and a third threaded tube (17) are arranged at both ends of the jet pipe (21), and the second threaded tube (16) is threadedly fixed to the first threaded opening (15) of the blower (12); the second threaded opening (5) and the third threaded opening (11) are respectively arranged at the upper and lower ends of the supply box (10), and the third threaded tube (17) is threadedly fixed to the second threaded opening (5), and the third threaded opening (11) is threadedly fixed to the first threaded tube (9) on the connecting ring (2).

[0016] Furthermore, a switch (20) is provided on the pipe section where the second threaded opening of the supply box (10) is located.

[0017] Furthermore, the pumping device comprises a centrifugal pump (23), and the centrifugal pump (23) is connected to the pipe opening (8) of the connecting ring (2) through a water pipe.

[0018] Furthermore, the photovoltaic panel is connected to the first stepper motor, the second stepper motor and the centrifugal pump, and serves as a partial power source for the latter three, making full use of solar energy, a clean energy, to achieve a low-carbon energy-saving effect.

[0019] Furthermore, the jet pipe (21) has an M-shaped structure.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The present invention introduces an air blowing device to achieve air blowing drying and maintenance of photovoltaic panels. It can switch between cold and hot air modes according to seasonal changes to control the temperature of the photovoltaic panels within the normal use range, thereby ensuring that the light energy conversion rate of the photovoltaic panels is stable at a high level for a long time.

[0022] 2. Compared with the traditional method of wiping with instruments, the maintenance method of removing residual water stains by air drying in the present invention does not directly contact the photovoltaic panel, thus avoiding structural damage to the surface coating of the photovoltaic panel and reducing the cost of repeatedly replacing the wiping device.

[0023] 3. The "one tube for multiple uses" function of the jet pipe of the present invention and the M-shaped structural design can reduce material costs, effectively reduce water resource waste, respond to the country's strategic requirements for developing a low-carbon economy, and facilitate the development and promotion of photovoltaic roof technology.

[0024] 4. The present invention sets two sets of moving devices. The stepper motor rotates to drive the threaded rod, which together drives the blowing device, the jet device and the supply box to move along the surface of the photovoltaic panel. The pumping device and the blowing device realize the integration of detergent spraying, high-pressure water flushing, and blowing drying maintenance during the movement. The cleaning and maintenance methods can be selected according to different seasons. It is efficient, low-carbon and intelligent, which can significantly extend the service life of the photovoltaic panel and reduce the cost of photovoltaic technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural diagram of the device of the present invention.

[0026] Figure 2a It is a schematic diagram of the structure of the blowing device of the present invention.

[0027] Figure 2b It is a detailed internal structure diagram of the blower of the present invention.

[0028] Figure 3 It is a jet pipe and detailed structure diagram of the present invention.

[0029] Figure 4 This is a structural diagram of the supply box of the present invention.

[0030] Figure 5 It is a structural diagram of the connecting ring of the present invention.

[0031] In the figure: 1. Solar photovoltaic panel; 2. Connecting ring; 3. Ventilation hole; 4. First nut; 5. Second threaded opening; 6. First stepper motor; 7. Second stepper motor; 8. Pipe opening; 9. First threaded pipe; 10. Supply box; 11. Third threaded opening; 12. Blower; 13. Semicircular welding piece; 14. Control valve; 15. First threaded opening; 16. Second threaded pipe; 17. Third threaded pipe; 18. Fan; 19. Thermal resistor wire; 20. Switch; 21. Jet pipe; 22. Nozzle; 23. Centrifugal pump; 24. Annular channel; 25. First threaded rod; 26. Second threaded rod; 27. Second nut. DETAILED DESCRIPTION

[0032] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0034] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0035] refer to Figures 1 to 5 The present invention discloses a large-area and efficient cleaning and maintenance device for the photovoltaic roof of an ecological corridor bridge, which is used for cleaning and maintaining the solar photovoltaic panel 1 of the ecological corridor bridge, and includes a moving device, an air blowing device, a jet device and a pumping device. The jet device is arranged on the top of the solar photovoltaic panel 1, and is used for spraying, blowing and drying the solar photovoltaic panel 1; the moving device is provided with two sets, which are arranged on both sides of the solar photovoltaic panel 1, and are used for moving the air blowing device, the jet device and the supply box 10; the air blowing device is arranged on the upper edge of the solar photovoltaic panel 1, and the upper and lower ends are respectively connected to the moving device and the jet device; the pumping device is arranged at the bottom of the solar photovoltaic panel 1, and is respectively connected to the jet device and the moving device and provides detergent and clean water to the jet device.

[0036] In one embodiment, the blowing device includes a blower 12, a control valve 14, a semicircular welding part 13 and a first threaded port 15, and the control valve 14 is arranged on the threaded pipe section where the first threaded port 15 is located; a fan 18 is arranged inside the blower 12, and a thermal resistor wire 9 and a ventilation hole 3 are respectively arranged on the front and rear sides of the fan 18, and the semicircular welding part 13 and the first threaded port 15 are respectively arranged on the front and rear ends of the blower 12, and the blower 12 is rotatably fixed to the end thread of the jet device through the first threaded port 15.

[0037] Specifically, the blower device intelligently switches between cold air and hot air modes according to seasonal changes to provide a wind source for the jet device.

[0038] In one embodiment, the pumping device includes a centrifugal pump 23 , a supply box 10 and a connecting ring 2 , and the centrifugal pump 23 is connected to the supply box 10 via the connecting ring 2 .

[0039] In one embodiment, the moving device includes a first moving device and a second moving device, the first moving device includes a first threaded rod 25, a first stepper motor 6 and a first nut 4, the second moving device includes a second threaded rod 26, a second stepper motor 7, and a second nut 27, the output end of the first stepper motor 6 is transmission-connected to the first threaded rod 25, the output end of the first stepper motor 7 is transmission-connected to the second threaded rod 26, the first stepper motor 6 and the second stepper motor 7 respectively rotate the first threaded rod 25 and the second threaded rod 26 to drive the blowing device, the jet device and the supply box 10 to move along the surface of the solar photovoltaic panel 1; the first nut 4 is welded and fixed to the blower 12 by the semicircular welding part 13, the first nut 4 is connected to the first threaded rod 25 by an internal ball bearing, the second nut 27 is welded and fixed to the supply box 10 by a connecting ring 2, and the second nut 27 is connected to the second threaded rod 26 by an internal ball bearing to drive the supply box 10 to move left and right.

[0040] Specifically, the rotational motion of the stepper motor is converted into horizontal motion. The first nut is welded to the blower through a semicircular welding part, driving the blowing device to move at a uniform speed along the photovoltaic panel. The second nut is connected to the supply box through a connecting ring, driving the supply box to move horizontally along the photovoltaic panel.

[0041] Specifically, the photovoltaic panel 1 is connected to the first stepper motor 6 , the second stepper motor 7 and the centrifugal pump 23 , providing a partial power source for the latter three, thereby playing a role in saving energy.

[0042] In one embodiment, the semicircular welding piece 13 has a semicircular groove structure, and the semicircular groove structure is clamped on the first threaded rod 25 and is welded and fixed to the first nut 4 .

[0043] In one embodiment, the connecting ring 2 includes an annular channel 24 and a first threaded tube 9 and a pipe mouth 8 that are interconnected and arranged on the outer side wall of the annular channel 24. The annular channel 24 is sleeved on the second threaded rod 26 and is welded and fixed to the second nut 27. The pipe mouth 8 is connected to the centrifugal pump 23 through a water pipe, and the first threaded mouth 9 is connected to the jet device.

[0044] In one embodiment, the jet device includes a jet pipe 21, on which a plurality of nozzles 22 are arranged at intervals in the direction toward the solar photovoltaic panel 1, and both ends of the jet pipe 21 are provided with a second threaded tube 16 and a third threaded tube 17, and the second threaded tube 16 is threadedly rotated and fixed to the first threaded opening 15 of the blower 12; the upper and lower ends of the supply box 10 are respectively provided with a second threaded opening 5 and a third threaded opening 11, and the third threaded tube 17 is rotationally fixed to the second threaded opening 5, and the third threaded opening 11 is threadedly rotated and fixed to the first threaded tube 9 on the connecting ring 2.

[0045] Specifically, during the cleaning process, the jet pipe can correspondingly spray out three different fluids, namely, a high-pressure water detergent mixture, high-pressure water and strong wind, for cleaning and drying solar photovoltaic panels, thus achieving "one pipe for multiple uses".

[0046] In one embodiment, a switch 20 is provided on the pipe section where the second threaded opening of the supply box 10 is located.

[0047] Specifically, the supply box is used to control the delivery of detergent to ensure the supply of detergent in the first round of cleaning process, and the annular channel provides a connection channel for the threaded pipes and the nozzles at the left and right ends. The supply box is used to deliver high-pressure clean water or a mixture of detergent and clean water to the jet device. At the same time, the liquid can take away part of the heat generated by the friction between the nut and the ball screw during the flow process, ensuring the safety and stability of the transmission device.

[0048] In one embodiment, the pumping device includes a centrifugal pump 23, and the centrifugal pump 23 is connected to the pipe opening 8 of the connecting ring 2 through a water pipe.

[0049] In one embodiment, the jet pipe 21 is in an M-shaped structure.

[0050] Specifically, the overall design of the jet pipe is in the form of an M-shaped structure, which is beneficial to increase the coverage area of ​​the jet pipe, ensure that the surface of the photovoltaic panel can be comprehensively cleaned and dried, and effectively save water resources. The upper end of the jet pipe is rotatably connected to the blower through a threaded tube, which is used to transmit the power of the blower to move horizontally, and the lower end of the jet device is rotatably fixed to the threaded port on the upper end of the supply box through a threaded tube, which is used to drive the supply box to move horizontally together.

[0051] Specifically, during the movement, the nozzle 22 can spray out three different fluids to completely cover the surface of the solar photovoltaic panel 1, ensuring that the solar photovoltaic panel 1 is fully cleaned and dried. Compared with the straight structure, the M-shaped structure enables the jet tube 21 to have a wider coverage area, which is beneficial to improve the cleaning and maintenance efficiency and achieve low-carbon energy-saving effects; the second threaded tube 16 on the jet device is used to transmit the wind force generated by the blower and the power of horizontal movement, and the third threaded tube 17 on the jet device is rotatably fixedly connected to the threaded port 5 at the end of the supply box 10, and moves horizontally together with the supply box.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A large-area and efficient cleaning and maintenance device for an ecological bridge photovoltaic roof, used for cleaning and maintaining an ecological bridge solar photovoltaic panel (1), characterized in that: The invention comprises a moving device, an air blowing device, a jet device and a pumping device, wherein the jet device is arranged on the top of the solar photovoltaic panel (1) for spraying, blowing and drying the solar photovoltaic panel (1); the moving device is provided with two sets, which are arranged on both sides of the solar photovoltaic panel (1) for moving the air blowing device, the jet device and the supply box (10); the air blowing device is arranged on the upper edge of the solar photovoltaic panel (1), and the upper and lower ends are respectively connected to the moving device and the jet device; the pumping device is arranged at the bottom of the solar photovoltaic panel (1), and is respectively connected to the jet device and the moving device and provides cleaning agent and clean water to the jet device.

2. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 1 is characterized in that: The blowing device comprises a blower (12), a control valve (14), a semicircular welding piece (13) and a first threaded opening (15); the control valve (14) is arranged on the threaded pipe section where the first threaded opening (15) is located; a fan (18) is arranged inside the blower (12); a thermal resistance wire (19) and a ventilation hole (3) are arranged on the front and rear sides of the fan (18); the semicircular welding piece (13) and the first threaded opening (15) are arranged on the front and rear ends of the blower (12); the blower (12) is rotatably fixed to the end thread of the jet device through the first threaded opening (15).

3. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 2 is characterized in that: The pumping device comprises a centrifugal pump (23), a supply box (10) and a connecting ring (2); the centrifugal pump (23) and the supply box (10) are connected via the connecting ring (2).

4. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 3 is characterized in that: The moving device comprises a first moving device and a second moving device, the first moving device comprises a first threaded rod (25), a first stepping motor (6) and a first nut (4), the second moving device comprises a second threaded rod (26), a second stepping motor (7) and a second nut (27), the output end of the first stepping motor (6) is transmission-connected to the first threaded rod (25), the output end of the first stepping motor (7) is transmission-connected to the second threaded rod (26), the first stepping motor (6) and the second stepping motor (7) respectively rotate the first threaded rod (25) and a second threaded rod (26) for driving the blowing device, the jet device and the supply box (10) to move along the surface of the solar photovoltaic panel (1); the first nut (4) and the blower (12) are welded and fixed via the semicircular welding piece (13); the first nut (4) and the first threaded rod (25) are connected via an internal ball bearing; the second nut (27) and the supply box (10) are welded and fixed via a connecting ring (2); the second nut (27) and the second threaded rod (26) are connected via an internal ball bearing to drive the supply box (10) to move left and right.

5. The photovoltaic roof large-area high-efficiency and low-carbon cleaning and protection device according to claim 3 is characterized in that: The semicircular welding piece (13) has a semicircular groove structure, which is clamped on the first threaded rod (25) and is welded and fixed to the first nut (4).

6. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 3 is characterized in that: The connecting ring (2) comprises an annular hole (24) and a first threaded pipe (9) and a pipe mouth (8) which are connected to each other and are arranged on the outer side wall of the annular hole (24); the annular hole (24) is sleeved on the second threaded rod (26) and is welded and fixed to the second nut (27); the pipe mouth (8) is connected to the centrifugal pump (23) through a water pipe, and the first threaded mouth (9) is connected to the jet device.

7. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 6 is characterized in that: The jet device comprises a jet pipe (21), on which a plurality of nozzles (22) are arranged at intervals in a direction facing the solar photovoltaic panel (1), and a second threaded tube (16) and a third threaded tube (17) are arranged at both ends of the jet pipe (21), and the second threaded tube (16) is threadedly fixed to a first threaded opening (15) of the blower (12); the upper and lower ends of the supply box (10) are respectively provided with a second threaded opening (5) and a third threaded opening (11), and the third threaded tube (17) is threadedly fixed to the second threaded opening (5), and the third threaded opening (11) is threadedly fixed to the first threaded tube (9) on the connecting ring (2).

8. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 7 is characterized in that: The pipe section where the second threaded opening of the supply box (10) is located is provided with a switch (20).

9. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 7 is characterized in that: The jet pipe (21) is in an M-shaped structure.

10. The large-area and efficient cleaning and protection device for the photovoltaic roof of the ecological corridor bridge according to claim 5 is characterized in that: The photovoltaic panel (1) is connected to the first stepper motor (6), the second stepper motor (7) and the centrifugal pump (23).

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