Folding and stretching type photovoltaic car shed and working method thereof

Abstract

The invention relates to the technical field of photovoltaic power generation buildings, in particular to a folding and stretching type photovoltaic car shed and a working method thereof. The photovoltaic car shed comprises a supporting column and a photovoltaic module. The photovoltaic module comprises a bottom module, a middle module and an end module which are connected in sequence, the bottom module is rotationally installed on the supporting column around a first rotating shaft, the middle module and the bottom module are rotationally connected around a second rotating shaft, and the end module and the middle module are rotationally connected around a third rotating shaft; the first rotating shaft, the second rotating shaft and the third rotating shaft are parallel, the first rotating shaft is located on the outer side of the photovoltaic module, the second rotating shaft is located on the top side of the photovoltaic module, and the third rotating shaft is located on the bottom side of the photovoltaic module. According to the invention, the problems of insufficient folding proportion, complex field installation, low modularization degree and poor reliability are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic power generation building, and particularly relates to a folding and stretching type photovoltaic carport and a working method thereof. BACKGROUND

[0002] The photovoltaic carport is a device integrating vehicle parking protection and solar power generation functions, and is widely applied to residential areas, industrial parks, public parking lots and the like. The core of the photovoltaic carport is to integrate photovoltaic modules on the roof of the carport to realize sun-shading and rain-shielding and convert solar energy into electric energy to meet the power demand of the surrounding area or supply power to the grid.

[0003] A foldable photovoltaic carport is disclosed in the prior art, which comprises a carport support composed of a stand column and a longitudinal beam; a roof composed of a fixed support and a movable support, the fixed support being provided with a fixed solar panel at the top, and the movable support being hingedly connected to the fixed support at a side away from the stand column and provided with a movable solar panel; a driving mechanism and a folding support, the folding support being a parallel four-bar linkage structure composed of a pull rod, a first connecting rod and a second connecting rod, the pull rod being connected to the movable support and the connecting rod at two ends, and the driving mechanism driving the connecting rod to fold through a push rod; under normal weather, the driving mechanism drives the folding support to unfold the movable solar panel to be flush with the fixed solar panel; under strong wind weather, the driving mechanism reverses the action to make the movable solar panel turn down and hide below the fixed solar panel to reduce the windward area. The technology realizes windproof through folding action, and the fixed solar panel can still generate power.

[0004] The above photovoltaic carport has the following technical problems: Firstly, the overall folding ratio is limited: the movable solar panel is only turned down and hidden below the fixed solar panel, and the height direction size after folding is still large, which cannot meet the requirements of long-distance transportation or standard container loading.

[0005] Secondly, the on-site installation process is complex: the stand column, the longitudinal beam, the fixed support and the driving mechanism need to be assembled on site respectively, and the high-altitude operation time is long, which leads to low construction efficiency and high safety risk.

[0006] Finally, the folding action is only driven by a single electric push rod, and lacks a mechanical locking device, when the driving mechanism is powered off or fails, the movable solar panel has the risk of accidental falling, and the system reliability is insufficient. SUMMARY

[0007] In view of the deficiencies of the prior art, the purpose of the embodiments of the present application is to provide a folding and stretching type photovoltaic carport to solve the problems of insufficient folding ratio, complex on-site installation, low modularization degree and poor reliability in the prior art.

[0008] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions: The application discloses a folding and unfolding photovoltaic carport, which comprises a supporting column and a photovoltaic module; the photovoltaic module comprises a bottom module, a middle module and an end module which are connected in sequence; the bottom module is rotatably installed on the supporting column around a first rotating shaft; the middle module is rotatably connected with the bottom module around a second rotating shaft; and the end module is rotatably connected with the middle module around a third rotating shaft; the first rotating shaft, the second rotating shaft and the third rotating shaft are parallel, wherein the first rotating shaft is located on the outer side of the photovoltaic module, the second rotating shaft is located on the top side of the photovoltaic module, and the third rotating shaft is located on the bottom side of the photovoltaic module.

[0009] Optionally, the bottom side of the bottom module is provided with a first sleeve, the top of the supporting column is provided with a second sleeve, the first sleeve and the second sleeve are located on the same rotating shaft and are staggered after the bottom module is unfolded, and the bottom module and the supporting column are fixed by adopting a pin to penetrate the first sleeve and the second sleeve.

[0010] Optionally, a first through hole is arranged on the side beam of one end of the bottom module close to the middle module, a second through hole is arranged on the side beam of one end of the middle module close to the bottom module, the first through hole and the second through hole are coaxial after the middle module is unfolded relative to the bottom module, and the first through hole and the second through hole are connected through a first bolt, wherein the first bolt is located on the bottom side of the photovoltaic module.

[0011] Optionally, a first mounting seat is arranged on the top surface of one end of the middle module close to the end module, a second mounting seat is arranged on the top surface of one end of the end module close to the middle module, the mounting hole of the first mounting seat and the mounting hole of the second mounting seat are coaxial after the end module is unfolded relative to the middle module, and the first mounting seat and the second mounting seat are connected through a second bolt.

[0012] Optionally, the end module comprises at least two photovoltaic plates, a first metal piece and a double-sided pressing block, the first metal piece has two protrusions, the ends of the two photovoltaic plates are respectively pressed on the two protrusions of the first metal piece, and the two ends of the double-sided pressing block are respectively pressed on the ends of the two photovoltaic plates.

[0013] Optionally, an angle steel is arranged on one end of the end module away from the middle module, the end of the photovoltaic plate is pressed on the angle steel, the angle steel is provided with a convex plate, the two ends of the double-sided pressing block are respectively pressed on the photovoltaic plate and the convex plate, a second metal piece is arranged on one end of the end module close to the middle module, the second metal piece has a low protrusion and a high protrusion, the end of the photovoltaic plate is pressed on the low protrusion, and the two ends of the double-sided pressing block are respectively pressed on the photovoltaic plate and the high protrusion.

[0014] Optionally, the two ends of the first and second sheet metal parts are overlapped on the L-shaped plate, the water collecting groove is formed between the two protrusions of the first sheet metal part and between the two protrusions of the second sheet metal part, the L-shaped plate forms the water collecting groove, and the second sheet metal parts of the middle module and the end module are arranged in a staggered manner, a plurality of L-shaped plates are arranged along the length direction of the photovoltaic module, and the plurality of L-shaped plates are also arranged in a staggered manner.

[0015] Optionally, a locking device is further arranged between the middle module and the end module, the locking device comprises a telescopic assembly and a fixed assembly, the telescopic assembly is installed on the middle module or the end module, the fixed assembly is installed on the other one of the middle module and the end module, the telescopic assembly has a movable hook, the fixed assembly has a fixed hook, and the movable hook is hung on the fixed hook after the end module is unfolded relative to the middle module.

[0016] Optionally, the telescopic assembly further comprises a nut, a first support, a spring and a screw rod, the first support is a U-shaped structure, the screw rod is inserted into the first support, the nut is installed on the screw rod, the spring is abutted on the nut and the first support at two ends respectively, and the movable hook is installed at the end of the screw rod; the fixed assembly further comprises a connecting rod, a fixed washer and a second support, the connecting rod is inserted into the second support, the fixed washer is installed on the connecting rod and fixes the relative positions of the connecting rod and the second support, and the fixed hook is installed at the end of the connecting rod.

[0017] The embodiment of the present application further provides a working method of the folding and unfolding photovoltaic carport, and the working method comprises the following steps: The support column is fixedly installed on the foundation; The photovoltaic module is rotated by a set angle around the first rotating shaft, and the bottom module is fixed to the support column; The middle module is rotated around the second rotating shaft, and the end module is rotated around the third rotating shaft, until the photovoltaic module is completely unfolded.

[0018] The one or more technical solutions provided in the embodiment of the present application have at least the following technical effects or advantages: 1. The folding and unfolding photovoltaic carport comprises a support column and photovoltaic modules, the photovoltaic modules are composed of a bottom module, a middle module and an end module connected in sequence, the bottom module is rotatably installed on the support column around a first rotating shaft, the middle module is rotatably connected with the bottom module around a second rotating shaft, the end module is rotatably connected with the middle module around a third rotating shaft, and the three rotating shafts are parallel, the first, second and third rotating shafts are located at the outer side, top side and bottom side of the photovoltaic module respectively, the position distribution makes the rotation range and direction of each module more reasonable, which can realize the maximum folding and ensure the overall flatness of the photovoltaic module when unfolded, so that the photovoltaic panel can fully receive sunlight and the power generation efficiency is not affected. Relying on the three parallel and position-specific rotating shafts, each module can realize orderly rotation, and then complete the folding and unfolding action of the photovoltaic carport, solving the problem of large volume after folding and inconvenient transportation. Since each module can be folded around a specific rotating shaft, the overall volume is greatly reduced after folding, which is smaller than the size of a standard container, and can more easily meet the size requirements of standardized container transportation, reduce the occupation of transportation resources and transportation cost. At the same time, the modular split design can complete the installation by unfolding and quickly locking on site without significantly adjusting the overall structure, significantly reducing manual intervention and high-altitude operation, improving the adaptability to different scale parking lot scenes, and reducing the difficulty of on-site hoisting and assembly.

[0019] 2. A locking device is arranged between the end module and the middle module, which realizes quick and automatic locking after unfolding of the modules, further reduces manual operation and high-altitude operation, improves installation efficiency and safety, and ensures the mechanical strength and reliability of the connection.

[0020] The advantages of the additional aspects of the present application will be given in the following description, some of which will become apparent from the following description, or be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings. In addition, the sizes or distances between each other are exaggerated for showing the positions of the components, and the schematic diagram is only used for illustration.

[0022] Figure 1 is a schematic view of the photovoltaic carport after folding provided by the embodiment of the present application; Figure 2 is a schematic view of the unfolding process of the photovoltaic carport provided by the embodiment of the present application Figure 1 Figure 3 ​is a photovoltaic carport unfolding process schematic provided by the embodiment of the present application Figure 2 ; Figure 4 is a photovoltaic carport unfolded schematic provided by the embodiment of the present application Figure 5 is an end module schematic provided by the embodiment of the present application Figure 6 is a middle module schematic provided by the embodiment of the present application Figure 7 is a bottom module schematic provided by the embodiment of the present application Figure 8 is a support column and bottom module connection schematic provided by the embodiment of the present application Figure 9 is a bottom module and middle module connection schematic provided by the embodiment of the present application Figure 10 is a middle module and end module connection schematic provided by the embodiment of the present application Figure 11 is an end module two photovoltaic panel connection schematic provided by the embodiment of the present application Figure 12 is an end module photovoltaic panel outer end connection schematic provided by the embodiment of the present application Figure 13 is an end module and middle module connection schematic provided by the embodiment of the present application Figure 14 is an L-shaped plate arrangement schematic provided by the embodiment of the present application Figure 15 is a locking device arrangement position schematic provided by the embodiment of the present application Figure 16 is a locking device installation schematic provided by the embodiment of the present application Figure 17 is a locking device schematic provided by the embodiment of the present application In the figure: 1, support column; 2, bottom module; 3, middle module; 4, end module; 4-1, beam; 4-2, angle steel; 4-3, first sheet metal part; 4-4, second sheet metal part; 4-5, L-shaped plate; 5, locking device; 5-1, nut; 5-2, first support; 5-3, spring; 5-4, screw rod; 5-5, lock hook; 5-6, connecting rod; 5-7, fixed washer; 5-8, second support; 6, second rotating shaft; 7, third rotating shaft; 8, pin; 9, second bolt; 10, first bolt; 11, photovoltaic panel; 12, double-sided pressing block; 13, first rotating shaft DETAILED DESCRIPTION It should be noted that the following detailed description is illustrative only and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, it should be understood that the use of the terms“including,”“comprising,”“having,” and / or“containing” are intended to be inclusive of the presence of one or more features, steps, operations, devices, components, and / or combinations thereof.

[0023] Embodiment 1 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , the embodiment proposes a folding and stretching photovoltaic carport, which comprises a support column 1 and a photovoltaic module; the photovoltaic module comprises a bottom module 2 (as shown in Figure 7 ), a middle module 3 (as shown in Figure 6 ) and an end module 4 (as shown in Figure 5 ) connected in sequence, the bottom module 2 is rotatably installed on the support column 1 around a first rotating shaft 13, the middle module 3 is rotatably connected with the bottom module 2 around a second rotating shaft 6, and the end module 4 is rotatably connected with the middle module 3 around a third rotating shaft 7; the first rotating shaft 13, the second rotating shaft 6 and the third rotating shaft 7 are parallel, wherein the first rotating shaft 13 is located on the outer side of the photovoltaic module, the second rotating shaft 6 is located on the top side of the photovoltaic module, and the third rotating shaft 7 is located on the bottom side of the photovoltaic module.

[0024] The folding and stretching photovoltaic carport realizes the modularization of the structure by setting the support column 1 and the photovoltaic module composed of the bottom module 2, the middle module 3 and the end module 4 connected in sequence. The bottom module 2 can rotate relative to the support column 1 around the first rotating shaft 13, the middle module 3 is connected with the bottom module 2 through the second rotating shaft 6, and the end module 4 is connected with the middle module 3 through the third rotating shaft 7. The three rotating shafts are parallel to each other and are located on the outer side, the top side and the bottom side of the photovoltaic module respectively. This arrangement enables each module to perform orderly folding and unfolding actions around rotating shafts at different positions. The modular design facilitates transportation and rapid installation on site. The multi-rotating shaft layout ensures the coordination of the folding process and the stability of the structure after unfolding, reduces the occupied space of the overall structure in the non-use state, and solves the problems of transportation difficulty and large on-site installation workload of traditional fixed photovoltaic carports.

[0025] As shown in Figure 8 , the bottom side of the bottom module 2 has a first sleeve, the top of the support column 1 has a second sleeve, and the first sleeve and the second sleeve are located on the same rotating shaft and are arranged alternately after the bottom module 2 is unfolded. A pin 8 is used to pass through the first sleeve and the second sleeve to fix the bottom module 2 and the support column 1.

[0026] The sleeve staggered fit and the pin 8 penetrating mode provide a simple and reliable connection and fixing mechanism, which ensures the firm connection of the bottom module 2 and the support column 1 in the unfolded state, and the pin 8 connection mode also facilitates quick assembly and disassembly, providing a foundation support for the stability of the overall structure.

[0027] As shown in Figure 9 , the bottom module 2 is provided with a first through hole on one end of the side beam 4-1 close to the middle module 3, and the middle module 3 is provided with a second through hole on one end of the side beam close to the bottom module 2, and after the middle module 3 is unfolded relative to the bottom module 2, the first through hole and the second through hole are coaxial and connected by a first bolt 10, and the first bolt 10 is located on the bottom side of the photovoltaic module.

[0028] This connection mode tightens from the bottom of the structure after the module is unfolded, enhancing the bending and torsional resistance between the bottom and the middle module 3, and the bolt connection provides a detachable rigid connection, which helps to maintain the form and carrying capacity of the overall structure.

[0029] As shown in Figure 10 , the middle module 3 is provided with a first mounting seat on the top surface of one end close to the end module 4, and the end module 4 is provided with a second mounting seat on the top surface of one end close to the middle module 3, and after the end module 4 is unfolded relative to the middle module 3, the mounting holes of the first mounting seat and the second mounting seat are coaxial, and the first mounting seat and the second mounting seat are connected by a second bolt 9.

[0030] The top surface bolt connection and the bottom connection cooperate with each other to constrain the relative movement between the modules, improve the stiffness and integrity of the connection area, and ensure the flatness and stability of the photovoltaic module in the unfolded state.

[0031] As shown in Figure 5 , Figure 11 , the end module 4 includes two photovoltaic panels 11, a first sheet metal part 4-3 and a double-sided pressing block 12, the first sheet metal part 4-3 is an M-shaped sheet metal part with two protrusions, the ends of the two photovoltaic panels 11 are respectively pressed on the two protrusions of the first sheet metal part 4-3, and the two ends of the double-sided pressing block 12 are respectively pressed on the ends of the two photovoltaic panels 11.

[0032] This structure realizes reliable clamping and installation of the photovoltaic panel 11, the double-sided pressing block 12 provides uniform pressing force, and the first sheet metal part 4-3 serves as a support, simplifying the installation process of the photovoltaic panel 11 and improving the assembly efficiency and quality of the module.

[0033] As shown in Figure 12 , Figure 13As shown, the end module 4 is provided with an angle steel 4-2 at one end away from the middle module 3, the end of the photovoltaic panel 11 is crimped on the angle steel 4-2, the angle steel 4-2 has a tab, and the two ends of the double-sided pressing block 12 are respectively crimped on the photovoltaic panel 11 and the tab; the end module 4 is provided with a second sheet metal part 4-4 at one end close to the middle module 3, the second sheet metal part 4-4 has a low protrusion and a high protrusion, the end of the photovoltaic panel 11 is crimped on the low protrusion, and the two ends of the double-sided pressing block 12 are respectively crimped on the photovoltaic panel 11 and the high protrusion.

[0034] The arrangement of the angle steel 4-2 enhances the structural strength of the end of the end module 4, can better withstand external forces such as wind force and impact force, protects the photovoltaic panel 11 from damage, and solves the problem of insufficient structural strength at the end of the middle module. The design of the low protrusion and the high protrusion of the second sheet metal part 4-4 can achieve stable installation of the photovoltaic panel 11 and provide conditions for the formation of subsequent water guide structures. At the same time, the cooperation of the double-sided pressing block 12 with the angle steel 4-2 and the second sheet metal part 4-4 strengthens the connection between the photovoltaic panel 11 and the module frame, avoiding loosening of the photovoltaic panel 11 under vibration or external force.

[0035] As shown in Figures 5-7 , the end module 4 is composed of two photovoltaic panels 11 and their two side frames and bottom supports, the bottom module 2 is composed of one photovoltaic panel 11 and its two side frames and bottom supports, and the middle module 3 is composed of two photovoltaic panels 11 and their two side frames and bottom supports. The installation structure of the photovoltaic panel 11 in the bottom module 2 and the middle module 3 is similar to that of the end module 4, and will not be described in detail here.

[0036] As shown in Figure 11 , Figure 13 , Figure 14 , the two ends of the first sheet metal part 4-3 and the second sheet metal part 4-4 are lapped on the L-shaped plate 4-5, the water receiving groove is formed between the two protrusions of the first sheet metal part 4-3 and between the two protrusions of the second sheet metal part 4-4, the L-shaped plate 4-5 forms a water collecting groove, and the second sheet metal parts 4-4 of the middle module 3 and the end module 4 are arranged in a staggered manner, and a plurality of L-shaped plates 4-5 are arranged along the length direction of the photovoltaic module, and the plurality of L-shaped plates 4-5 are also arranged in a staggered manner.

[0037] The cooperation of the water receiving groove and the water collecting groove forms a perfect water guide structure, which can quickly guide and discharge the rainwater on the surface of the photovoltaic panel 11, avoid the accumulation of rainwater on the surface of the photovoltaic panel 11, prevent the rainwater from penetrating into the photovoltaic panel 11 and affecting the power generation performance, and also avoid the accumulation of rainwater on the module frame leading to frame corrosion. The staggered arrangement of the second sheet metal parts 4-4 of the middle module 3 and the end module 4, and the staggered arrangement of the plurality of L-shaped plates 4-5, can avoid water leakage at the module connection.

[0038] In summary, the embodiment adopts modular design, realizes the function of "folding for transportation and unfolding for power generation", greatly reduces the site construction, solves the problems of large space occupation and large site installation engineering of traditional photovoltaic support, and improves the installation efficiency. The photovoltaic carport realizes modular manufacturing in the factory, has simple manufacturing, small site construction amount, small space occupation after contraction, conforms to the container transportation size, and is convenient to transport.

[0039] Embodiment 2 As shown in Figure 15 , Figure 16 , the middle module 3 and the end module 4 are further provided with a locking device 5, the locking device 5 comprises a telescopic assembly and a fixed assembly, the telescopic assembly is installed on the middle module or the end module 4, the fixed assembly is installed on the other module of the middle module and the end module 4, the telescopic assembly has a movable hook 5-5, the fixed assembly has a fixed hook 5-5, and the movable hook 5-5 is hung on the fixed hook 5-5 after the end module 4 is unfolded relative to the middle module 3. The locking device 5 realizes quick automatic locking after unfolding between the modules, reduces manual operation and high-altitude operation, improves installation efficiency and safety, and at the same time ensures the mechanical strength and reliability of the connection.

[0040] As shown in Figure 17 , the telescopic assembly further comprises a nut 5-1, a first support 5-2, a spring 5-3 and a screw rod 5-4, the first support 5-2 is a U-shaped structure, the screw rod 5-4 is connected to the first support 5-2, the nut 5-1 is installed on the screw rod 5-4, the spring 5-3 is abutted on the nut 5-1 and the first support 5-2 at two ends respectively, and the movable hook 5-5 is installed at the end of the screw rod 5-4; the fixed assembly further comprises a connecting rod 5-6, a fixed washer 5-7 and a second support 5-8, the connecting rod 5-6 is connected to the second support 5-8, the fixed washer 5-7 is installed on the connecting rod 5-6 and fixes the relative position of the connecting rod 5-6 and the second support 5-8, and the fixed hook 5-5 is installed at the end of the connecting rod 5-6.

[0041] When the end module 4 rotates to approach the unfolded state, the movable hook 5-5 first contacts the fixed hook 5-5, the screw rod 5-4 retreats to compress the spring 5-3; after reaching the meshing position, the spring 5-3 is released, and the hook body automatically falls into position. The fixed washer 5-7 limits the axial displacement of the connecting rod 5-6, and ensures the accurate position of the fixed hook 5-5.

[0042] Embodiment 3 The embodiment provides a working method of the folding and unfolding photovoltaic carport as described in embodiment 1, comprising the following steps: Firstly, the support column 1 is fixed on the foundation through bolts.

[0043] Second, the lifting equipment is used to rotate the three modules of the bottom module 2, the middle module 3 and the end module 4 together around the first rotating shaft 13 by 80 degrees.

[0044] Third, the bottom module 2 and the support column 1 are connected and fixed by the pin 8.

[0045] Fourth, the lifting equipment is used to rotate the middle module 3 and the end module 4 around the second rotating shaft 6 and the third rotating shaft 7 respectively by 180 degrees, at which time the photovoltaic carport is unfolded.

[0046] The method first fixes the support column 1 on the foundation to provide a reference for the whole system; the lifting equipment is used to rotate the bottom module, the middle module and the end module 4 around the first rotating shaft 13 integrally at one time to preliminarily unfold; the pin 8 is used to connect the bottom module 2 and the support column 1 to establish a rigid fulcrum; the middle module 3 and the end module 4 are further rotated respectively to make the three sections form a continuous inclined plane; the bottom module 2 and the middle module 3 are bolted at the bottom side, and the middle module 3 and the end module 4 are bolted at the top side to form a closed force ring.

[0047] Although the specific embodiments of the present application are described above with reference to the drawings, the description is not a limitation on the scope of protection of the present application, and those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A folding and extendable photovoltaic carport, characterized in that, include: Support columns and photovoltaic modules; The photovoltaic module includes a bottom module, a middle module, and an end module connected in sequence. The bottom module is rotatably mounted on the support column about a first pivot axis. The middle module is rotatably connected to the bottom module about a second pivot axis. The end module is rotatably connected to the middle module about a third pivot axis. The first, second, and third rotating shafts are parallel, wherein the first rotating shaft is located on the outside of the photovoltaic module, the second rotating shaft is located on the top side of the photovoltaic module, and the third rotating shaft is located on the bottom side of the photovoltaic module.

2. The folding and extending photovoltaic carport as described in claim 1, characterized in that, The bottom module has a first sleeve on its bottom side and the support column has a second sleeve on its top. After the bottom module is unfolded, the first sleeve and the second sleeve are located on the same pivot and are arranged in an alternating manner. The bottom module and the support column are fixed by pins inserted through the first sleeve and the second sleeve.

3. The folding and extending photovoltaic carport as described in claim 1, characterized in that, A first through hole is provided on the side beam of the bottom module near the middle module, and a second through hole is provided on the side beam of the middle module near the bottom module. After the middle module is unfolded relative to the bottom module, the first through hole and the second through hole are coaxial and connected by a first bolt located on the bottom side of the photovoltaic module.

4. The folding and extending photovoltaic carport as described in claim 1, characterized in that, A first mounting base is provided on the top surface of the middle module near one end of the end module, and a second mounting base is provided on the top surface of the end module near one end of the middle module. After the end module is unfolded relative to the middle module, the mounting holes of the first mounting base and the second mounting base are coaxial, and the first mounting base and the second mounting base are connected by a second bolt.

5. The folding and extending photovoltaic carport as described in claim 1, characterized in that, The end module includes at least two photovoltaic panels, a first sheet metal part, and a double-sided pressing block. The first sheet metal part has two protrusions, and the ends of the two photovoltaic panels are respectively pressed onto the two protrusions of the first sheet metal part. The two ends of the double-sided pressing block are respectively pressed onto the ends of the two photovoltaic panels.

6. The folding and extending photovoltaic carport as described in claim 5, characterized in that, An angle steel is provided at the end of the end module away from the middle module. The end of the photovoltaic panel is pressed onto the angle steel. The angle steel has a convex plate. The two ends of the double-sided pressing block are pressed onto the photovoltaic panel and the convex plate, respectively. A second sheet metal part is provided at the end of the end module near the middle module. The second sheet metal part has a low convexity and a high convexity. The end of the photovoltaic panel is pressed onto the low convexity. The two ends of the double-sided pressing block are pressed onto the photovoltaic panel and the high convexity, respectively.

7. The folding and extending photovoltaic carport as described in claim 6, characterized in that, The first sheet metal part and the second sheet metal part overlap on the L-shaped plate at both ends. A water collection groove is formed between the two protrusions of the first sheet metal part and the two protrusions of the second sheet metal part. The L-shaped plate forms a water collection groove. The second sheet metal parts of the middle module and the end module are staggered. Multiple L-shaped plates are set along the length of the photovoltaic module. The multiple L-shaped plates are also staggered.

8. The folding and extending photovoltaic carport as described in claim 1, characterized in that, A locking device is also provided between the middle module and the end module. The locking device includes a telescopic component and a fixing component. The telescopic component is installed on the middle module or the end module, and the fixing component is installed on the other module among the middle module and the end module. The telescopic component has a movable locking hook, and the fixing component has a fixed locking hook. After the end module is unfolded relative to the middle module, the movable locking hook is hooked onto the fixed locking hook.

9. The folding and extending photovoltaic carport as described in claim 8, characterized in that, The telescopic assembly further includes a nut, a first bracket, a spring, and a screw. The first bracket has a U-shaped structure, the screw passes through the first bracket, the nut is installed on the screw, and the two ends of the spring abut against the nut and the first bracket, respectively. A movable locking hook is installed at the end of the screw. The fixing assembly further includes a connecting rod, a fixing washer, and a second bracket. The connecting rod passes through the second bracket, the fixing washer is installed on the connecting rod and fixes the relative position of the connecting rod and the second bracket, and a fixed locking hook is installed at the end of the connecting rod.

10. A method for operating a folding and extending photovoltaic carport as described in any one of claims 1-9, characterized in that, Includes the following steps: The support columns are fixedly installed on the foundation. The photovoltaic module is rotated around the first axis at a set angle to fix the bottom module to the support column; The middle module is rotated around the second axis and the end module is rotated around the third axis until the photovoltaic module is fully deployed.

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