Mobile photovoltaic power station capable of being rapidly installed and stored

Abstract

The utility model discloses a mobile photovoltaic power station capable of being rapidly installed and stored, which belongs to the technical field of photovoltaic power stations, and is characterized in that a folding and unfolding device is formed by movably connecting upper and lower cross beams of a plurality of frames into a whole through eccentric hinges, and the frames are folded back to back or unfolded in a herringbone manner; connecting blocks with external thread connecting rods are arranged at the end corners of the four side faces of a cross beam of the frame, the connecting blocks are welded to end openings of the cross beam, after a photovoltaic assembly is inserted into the frame, a groove cover penetrates through the external thread connecting rods and is buckled into the cross beam, the groove cover is connected to the cross beam through first nuts, and limiting connecting pieces are arranged on the external thread connecting rods on the outer sides of the first nuts. The limiting connecting piece is limited and fixed by a second nut, and a movable detachable roller is mounted on the external thread connecting rod on the outer side of the second nut. Because the photovoltaic module can be inserted and taken out from the side surface, the photovoltaic module can be firstly put in or then put in according to needs, the replacement is very convenient, the frame is made of the curled channel steel, the weight is light, and the whole installation process is simple and rapid.

Description

Technical Field

[0001] This utility model pertains to distributed photovoltaic power generation technology, and relates to a mobile photovoltaic power station, particularly a mobile photovoltaic power station that can be quickly installed and stored. Background Technology

[0002] Distributed photovoltaic power generation is a new type of power generation and comprehensive energy utilization method with broad development prospects. Its main features are local power generation, local grid connection, local conversion, and local use. It can not only effectively increase the power generation of photovoltaic power plants of the same scale, but also effectively solve the problem of power loss during voltage boosting and long-distance transmission.

[0003] However, most distributed photovoltaic power stations are still built in the same way as large-scale power stations, using fixed brackets to install photovoltaic modules, which results in long construction cycles and high labor costs.

[0004] To reduce the high construction costs of photovoltaic power stations caused by manual labor, mobile photovoltaic power stations have emerged, taking advantage of the small scale and divisibility of distributed photovoltaic power stations. For example, Chinese Patent Publication No. CN117040410A, "A Photovoltaic Module Support Hinge Structure," provides a technical solution for building a mobile photovoltaic power station with a wheel system that allows for folding, storing, and unfolding of photovoltaic modules. This solves the problem of high construction costs. However, the photovoltaic module angle control in this technical solution uses an elastic tension rope design without a fixing device at the bottom. This makes it impossible to control the angle when wind enters from the back of the module and blows upwards, resulting in poor wind resistance and inconvenient assembly and replacement of photovoltaic modules. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of inconvenient replacement of photovoltaic modules and structural instability caused by heavy weight in existing mobile photovoltaic power stations.

[0006] To achieve the above objectives, this invention provides a mobile photovoltaic power station that can be quickly installed and stored. It fully considers the load-bearing and deformation capacity of the folding frame, its wind load resistance after installation, and the rapid placement and replacement of photovoltaic modules. The specific technical solution is as follows:

[0007] A mobile photovoltaic power station that can be quickly installed and stored is characterized in that: the mobile photovoltaic power station comprises a container, photovoltaic modules, a folding and unfolding device, a storage device, a fastening device, and a power distribution system;

[0008] The folding and unfolding device is formed by connecting multiple frames in a back-to-back folding or herringbone unfolding manner. The frame includes upper and lower crossbeams, intermediate spacers, and left and right side openable slot covers. The upper and lower crossbeams are integrally connected by eccentric hinges. At the four side end corners of the frame crossbeams, there are connection blocks with externally threaded connecting rods. The connection blocks are welded at the crossbeam ports. The photovoltaic module is inserted into the frame. After the slot cover passes through the externally threaded connecting rod and is buckled into the crossbeam, it is connected to the crossbeam by a first nut. On the externally threaded connecting rod outside the first nut on the lower side, there is a limit connection piece, and the limit connection piece is limited and fixed by a second nut. On the externally threaded connecting rod outside the second nut, a movable and detachable roller is installed.

[0009] The second nut is a long nut, with the inner end of the outer surface being an external hexagonal surface and the outer end being a cylindrical surface.

[0010] The folding and unfolding device further includes a flexible limit rope, which is respectively connected to the limit connection pieces on the lower sides of the two adjacent frames on both sides.

[0011] The storage device is a hand-cranked or electric tightening wheel device. By winding the limit rope installed on the side of the frame of the folding and unfolding device around the tightening wheel, the unfolded frames are folded together and placed into the container.

[0012] The fastening device includes a ground nail, and the ground nail has a pressing opening that presses on the cylindrical surface of the second nut.

[0013] At the opening of the container, there is a backing plate. Inside the container, there is a roller track. After the detachable roller is removed, the lower side of the frame is placed on the roller track and pushed into the container. Inside the container, there is a pull ring on the upper part. When the folding and unfolding device is placed into the container, the pull ring pulls the upper limit connection piece to prevent the folding and unfolding device from tipping over when being pulled out.

[0014] According to the number of photovoltaic modules installed in the frame, it is determined whether to install the intermediate spacer. The shape is a square shape or a rectangular shape with a horizontal bar in the middle or a rectangular shape with a horizontal bar in the middle rotated 90°. Among them: for the crossbeam, for a larger load-bearing capacity, a U-shaped channel steel is internally welded with a long steel strip to form a square shape in seal script (i.e., the upper side of the square shape extends out), or for a smaller load-bearing capacity, L-shaped angle steels are welded at intervals on a square tube to form a groove to reduce the weight of the frame; the slot cover is a U-shaped channel steel, and U-shaped channel steel corner caps are welded on the outer sides of both ends of the slot cover to wrap the connection part; for the intermediate spacer, for a larger load-bearing capacity, steel plates are welded on both sides of a square tube to form two side grooves with the two sides extending out, or for a smaller load-bearing capacity, U-shaped angle steels are welded at intervals on both sides of a square tube to form two side grooves to reduce the weight of the frame.

[0015] One end of the limit connection piece has a round hole sleeved on the externally threaded connecting rod, and the other end has an open hook. A spring tongue seal can be provided at the opening of the open hook, which can hook the iron ring of the flexible limit rope and the cylinder of the rigid limit bar.

[0016] The flexible limiting rope is a steel ring chain rope.

[0017] The folding and unfolding device also includes a cable tensioning device to keep the connecting cables between the photovoltaic modules taut at all times. The cable tensioning device is a tension spring with a ring at the upper end and a hook at the lower end. The ring at the upper end of the tension spring is fitted onto the cylindrical surface of the outer end of the second nut on the upper side of the frame, and the hook at the lower end holds the cable. When the frame is unfolded, the cable pulls down to open the tension spring. When the frame is folded, the tension spring pulls the cable up to prevent the cable from sagging.

[0018] The photovoltaic arrays of mobile photovoltaic power stations are connected by rings between adjacent ground spikes to form an integrated array, which improves the wind pressure resistance of photovoltaic modules.

[0019] The usage process of this utility model is as follows: After the frame is assembled in the factory, the photovoltaic modules are placed into the frame from the side and the edges are sealed by the slot cover. The detachable rollers are installed, and the frames are folded back to back. When the folding and unfolding device assembled in the factory is pushed into the container, the detachable rollers are removed one by one starting from the first one to enter the container. The frame is then placed on the roller track in sequence and pushed into the container for transportation to the installation site. Starting from the outermost frame, the detachable rollers are installed one by one. At the same time, the limiting ropes are hung one by one on the limiting connecting pieces. The folding and unfolding device is pulled out from the container in sequence. When the unfolding device is at a suitable angle, the rollers are removed. Then, the ground nails are pressed into the ground with the second nut to fix the frame, thus completing the installation of the mobile photovoltaic power station. For cement ground, sandbags can also be used to press down the limiting ropes and limiting pieces for fixation.

[0020] The positive and beneficial effects of this utility model are: since the photovoltaic modules can be inserted and removed from the side, they can be placed first or placed at the installation site as needed, and replacement is particularly convenient; the frame is made of rolled-edge channel steel, which is lightweight; the whole installation process is simple and quick. Attached Figure Description

[0021] Figure 1 : A schematic diagram of the overall structure of this utility model for storage and unfolding.

[0022] Figure 2 : A schematic diagram of a single frame structure of the folding and unfolding device of this utility model.

[0023] Figure 3 : Figure 2 An explosion diagram.

[0024] Figure 4 : Figure 3 Schematic diagram of the upper and lower crossbeams.

[0025] Figure 5: Figure 3 A schematic diagram of the structure of the center spacer.

[0026] Figure 6 : Figure 3 A schematic diagram of the plug-in block with a screw in the middle.

[0027] Figure 7 : Figure 3 A schematic diagram of the structure of the middle limiting connecting piece.

[0028] Figure 8 : Figure 3 A schematic diagram of the structure of the second nut.

[0029] Figure 9 : A schematic diagram of the structure of the ground nail of this utility model.

[0030] Figure 10 : A schematic diagram of the structure of the roller of this utility model.

[0031] Figure 11 : A schematic diagram of the structure of the groove cover of this utility model.

[0032] Figure 12 : A schematic diagram of the photovoltaic array installation of this utility model.

[0033] Figure 13 : Figure 12 Enlarged view of a portion of the image.

[0034] Figure 14 : Figure 13 Enlarged view of section A.

[0035] Figure 15 : Figure 13 Enlarged view of section B in the middle.

[0036] In the diagram, 1. Container; 101. Roller; 102. Pull ring; 2. Photovoltaic module; 3. Folding / unfolding device; 4. Eccentric hinge; 5. Detachable roller; 6. Frame; 601. Crossbeam; 601-a. Crossbeam one; 601-b. Crossbeam two; 602. Spacer bar; 602-a. Spacer bar one; 602-b. Spacer bar two; 602-c. Spacer bar three; 603. Channel cover; 603-1. 603-2, Corner protector, 603-3, Cover plate, 7, First nut, 8, Limiting connecting piece, 801, Screw through hole, 802, Hook, 9, Second nut, 901, External hexagonal face, 902, Cylindrical face, 10, Insert block with screw, 1001, Insert block, 1002, Screw, 11, Ground nail, 1101, Pressing end, 1102, Ring, 12, Circular ring, 13, Limiting rope. Detailed Implementation

[0037] Example 1, for installing large-sized and heavy photovoltaic modules.

[0038] The photovoltaic module 2 measures 1134×2278×30 mm and weighs 30.6 kg. Each frame 6 rotates 90° in a U-shape, with two photovoltaic modules 2 mounted horizontally on each frame 6. Eight frames 6 are welded together by eccentric hinges 4. The folding and unfolding device 3 holds a total of 8 sets of 16 photovoltaic modules 2. The crossbeam 601 of the frame 6 adopts a crossbeam-601-a structure, made of 2.5 mm steel plate rolled into a U-shaped channel. Insertion blocks 1001 with screws are welded to the corners of the U-shaped channel. Then, a 2.5 mm thick steel plate is welded inside the U-shaped channel. The spacer 602 adopts the spacer 602-a structure. The square tube wall thickness is 2.5mm. 2.5mm thick steel plates are welded on both sides of the square tube to form grooves on both sides. The spacer 602 is welded in the middle of the upper and lower crossbeams 601. The groove body 603-1 of the groove cover 603 is a 2.5mm steel plate rolled into a U-shaped channel steel. The corner 603-2 is welded at both ends of the groove body 603-1. The corner 603-2 has a screw hole through which the plug block 10 with screw is inserted. The cover plate 603-3 is welded on the outer side. The limiting rope 13 is a steel ring chain rope.

[0039] The usage process of this embodiment 1 is as follows: After the frame 6 is assembled in the factory, the photovoltaic module 2 is placed into the frame 6 from the side and the edge is sealed by the slot cover 603. The screw 1002 of the plug block 10 with screws on the lower side is tightened with the first nut 7 in sequence. The limiting connecting piece 8 is inserted through the screw hole 801 and the second nut 9 is screwed in, where the outer hexagonal surface 901 is inward and the cylindrical surface 902 is outward. Then, the detachable rollers 5 are installed, and the frame is folded back to back. Then, when the folding and unfolding device 3 assembled in the factory enters the container 1, the detachable rollers 5 are removed one by one starting from the first one to enter the container 1. The lower crossbeam 601 of the frame 6 is placed on the roller 101 track in sequence. The ring of the tension spring is installed on the cylindrical surface 902 of the second nut 9 on the upper side. The hook holds the cable and pushes it into container 1. The upper limiting connecting piece 8 of the folding and unfolding device 3 is held by the pull ring 102 installed on container 1 to prevent tipping. After transporting to the installation site, starting from the outermost frame 6, the detachable rollers 5 are installed one by one. At the same time, the limiting ropes 13 are hung on the limiting connecting pieces 8 one by one. The folding and unfolding device 3 is pulled out from container 1 in sequence. The folding and unfolding device 3 is folded to a suitable angle, and the detachable rollers 5 are removed. Then, the pressing port 1101 of the ground nail 11 is pressed against the cylindrical surface 902 of the second nut 9 and driven into the ground to fix the frame 6, thus completing the installation of the mobile photovoltaic power station. For cement ground, sandbags can also be used to press down the limiting ropes 13 for fixation. When lifting the ground nail 11, the lifting ring 1102 is put on to lift the ground nail 11.

[0040] Force analysis:

[0041] According to the IEC61215 standard, a pressure of 5400Pa is applied to the surface of the component. According to the GB50797-2012 standard, the maximum allowable deflection of the main beam is length L / 250. In this implementation case, the main beam is 2350mm, that is, the ultimate deflection: Ymax=9.4mm. By using Woodworks for modeling and using Simulation for static stress simulation analysis, the deflection of this scheme is Y=6.83mm, and the structure is safe and reliable.

[0042] Example 2 is used for installing photovoltaic modules of smaller size and weight.

[0043] The photovoltaic module 2 measures 1134×1762×30 mm and weighs 8.6 kg. Two photovoltaic modules 2 are installed on each frame 6. The folding and unfolding device 3 installs a total of 8 groups of 16 photovoltaic modules 2. The crossbeam 601 of the frame 6 adopts the crossbeam 2 601-b structure, which is made of 2.5 mm thick square tubes welded with 2.5 mm thick L-shaped angle steel at intervals. The corners of the square tubes are welded with plug-in blocks 10 with screws. The middle spacer 602 adopts the spacer 2 602-b structure. The wall thickness of the square tube is 2.5 mm. 2.5mm thick U-shaped channel steel plates are welded at intervals on both sides of the square tube to form grooves on both sides. The middle spacer 602 is welded in the middle of the upper and lower crossbeams 601. The channel body 603-1 of the channel cover 603 is made of 2.5mm steel plate rolled into U-shaped channel steel. The wrap corners 603-2 are welded at both ends of the channel body 603-1. The wrap corners 603-2 have screw holes through which the plug block 10 with screw rods passes. The cover plate 603-3 is welded on the outer side. The limiting rope 13 is a steel ring chain rope.

[0044] Force analysis:

[0045] According to the IEC61215 standard, a pressure of 5400 Pa is applied to the surface of the component. According to the GB50797-2012 standard, the maximum allowable deflection of the main beam is length L / 250. In this implementation case, the main beam is 1835 mm long, that is, the ultimate deflection: Ymax=7.34 mm. By using Woodworks for modeling and using Simulation for static stress simulation analysis, the deflection of this scheme is Y=5.18 mm, and the structure is safe.

[0046] Figures 12 to 15 This is a diagram of the photovoltaic array installation structure of this utility model. The tilt angle of the photovoltaic module 2 is not less than 5 degrees to facilitate the flow of water and dust, but it is not suitable to be higher than 30 degrees. If it is higher than 30 degrees, the adjacent photovoltaic modules will cause shading, which is not conducive to the power generation efficiency of the photovoltaic module 2. In order to prevent wind from blowing upward from below the photovoltaic module 2 and causing damage, the starting ring 1101 of the ground nail 11 between two adjacent sets of photovoltaic arrays is connected by a ring 12, so that the entire array is connected as a whole and the ability to resist wind is increased. Sandbags can also be placed on the limiting rope 13 or ground nails 11 can be added to improve the wind resistance.

Claims

1. A mobile photovoltaic power station that can be quickly installed and stored, characterized in that: Mobile photovoltaic power stations consist of containers, photovoltaic modules, folding and unfolding devices, storage devices, fastening devices, and power distribution systems, among which: The folding and unfolding device consists of multiple frames connected together, which fold back-to-back or unfold in a herringbone shape. The frame includes upper and lower crossbeams, a middle partition strip, and left and right side openable slot covers. The upper and lower crossbeams are connected to each other by eccentric hinges. Connecting blocks with external threaded connecting rods are provided at the four side corners of the frame crossbeams. The connecting blocks are welded to the ends of the crossbeams. The photovoltaic module is inserted into the frame. After the slot cover passes through the external threaded connecting rod and is snapped into the crossbeam, it is connected to the crossbeam by the first nut. A limiting connecting piece is provided on the external threaded connecting rod outside the first nut on the lower side. The limiting connecting piece is limited and fixed by the second nut. A movable and detachable roller is installed on the external threaded connecting rod outside the second nut. The second nut is a long nut, with an outer hexagonal surface at the inner end and a cylindrical surface at the outer end; The folding and unfolding device also includes flexible limiting ropes, which are respectively connected to the limiting connecting pieces on both sides of the frame. The storage device is a hand-cranked or electric tightening wheel device, which folds the unfolded frame together by winding the limiting rope installed on the side of the folding and unfolding device frame around the tightening wheel. The fastening device includes a ground nail with a pressure hole that presses against the cylindrical surface of the second nut; The container opening is equipped with a pad, and the container is equipped with a roller track. A pull ring is located on the top inside the container. When the folding and unfolding device is placed inside the container, the pull ring pulls the upper limiting connecting piece.

2. A mobile photovoltaic power station that can be quickly installed and stored as described in claim 1, characterized in that: The frame is shaped like a square, a sun, or a sun rotated 90°, wherein: The upper and lower crossbeams are made of U-shaped channel steel with long steel strips welded inside to form a square shape with protruding top, or L-shaped angle steel is welded at intervals on a square tube to form a groove. The aforementioned intermediate spacer is made by welding steel plates to both sides of a square tube to form a U-shape, with the two sides extending out to form two side grooves, or by welding U-shaped angle steel to both sides of a square tube at intervals to form two side grooves; The openable slot cover is a U-shaped channel steel, with U-shaped channel steel corner protectors welded to the outer sides of both ends of the slot cover, which cover the connection.

3. A mobile photovoltaic power station that can be quickly installed and stored as described in claim 1, characterized in that: The limiting connecting piece has a round hole at one end that fits onto the external threaded connecting rod, and an open hook at the other end. The opening of the open hook has a spring-loaded seal that hooks onto the steel ring of the flexible limiting rope.

4. A mobile photovoltaic power station that can be quickly installed and stored as described in claim 1, characterized in that: The flexible limiting rope described is a steel ring chain rope.

5. A mobile photovoltaic power station that can be quickly installed and stored as described in claim 1, characterized in that: The folding and unfolding device also includes a cable tensioning device to keep the connecting cables between the photovoltaic modules taut at all times.

6. A mobile photovoltaic power station that can be quickly installed and stored as described in claim 5, characterized in that: The cable tensioning device is a tension spring, with a ring at the upper end and a hook at the lower end. The ring at the upper end of the tension spring is fitted onto the cylindrical surface of the outer end of the second nut on the upper side of the frame, and the hook at the lower end holds the cable.

7. A mobile photovoltaic power station that can be quickly installed and stored as described in any one of claims 1 to 6, characterized in that: The photovoltaic arrays of the mobile photovoltaic power station are connected by rings between adjacent ground spikes to form an integrated array.

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