Building roof photovoltaic power generation assembly

Abstract

The application relates to the field of photovoltaic power generation, in particular to a building roof photovoltaic power generation assembly which comprises a support assembly and a photovoltaic panel group, the photovoltaic panel group is installed on the support assembly, the support assembly comprises a frame body and a crossbeam, the frame body is arranged on a base surface of a building roof, the crossbeam is laid on the frame body, a clamping assembly is arranged on the crossbeam, the photovoltaic panel group is fixed on the crossbeam through the clamping assembly, a pulling structure is arranged at a wiring position of the crossbeam corresponding to the photovoltaic panel group, the pulling structure has a moving end which can reciprocate along the height direction of the crossbeam, and a wiring box is detachably installed on the moving end. According to the application, the pulling structure along the height direction is arranged at the wiring position of the crossbeam corresponding to the photovoltaic panel, the wiring box is detachably installed on the moving end of the pulling structure, when overhauling, the wiring box can be vertically pulled down along the slide rail and exposed by being unlocked, the overhauling time is shortened, and the operation and maintenance cost is remarkably reduced.

Description

Technical Field

[0001] This application relates to the technical field of photovoltaic power generation, and in particular to a building rooftop photovoltaic power generation module. Background Technology

[0002] With the rapid development of the photovoltaic industry, building rooftop photovoltaic power generation systems have been widely used in industrial, commercial, and residential buildings because they can make full use of idle space and provide local power supply. However, there are still many problems to be solved in the structural design of existing building rooftop photovoltaic power generation modules.

[0003] Traditional photovoltaic (PV) module junction boxes are typically fixed to the back of the PV panel using adhesive or welding. When problems such as poor contact, terminal oxidation, or wiring faults occur in the junction box, the fixing structure between the PV panel and the bracket must be disassembled before repair or replacement can be performed. This process is time-consuming and labor-intensive, and it is also prone to damaging the edges of the PV panel and reducing its sealing performance due to disassembly, thereby affecting the overall lifespan of the module. Utility Model Content

[0004] To facilitate the inspection and maintenance of junction boxes, this application provides a building rooftop photovoltaic power generation module.

[0005] The technical solution adopted in this application for a building rooftop photovoltaic power generation module is as follows:

[0006] A building rooftop photovoltaic power generation module includes a support assembly and photovoltaic panels. The photovoltaic panels are mounted on the support assembly. The support assembly includes a frame and a crossbeam. The frame is disposed on the foundation surface of the building roof. The crossbeam is laid on the frame and has a fastening assembly. The photovoltaic panels are fixed to the crossbeam by the fastening assembly. A pull-out structure is provided at the wiring position of the photovoltaic panels on the crossbeam. The pull-out structure has a movable end that can reciprocate along the height direction of the crossbeam. A junction box is detachably installed on the movable end.

[0007] Optionally, the pull-out structure includes a fixed frame and a support seat. The fixed frame is fixedly installed on the side wall of the crossbeam. Two sets of fixed frames are provided and distributed opposite each other. Each side of the two sets of fixed frames is provided with a slide rail. The support seat is slidably installed on the slide rail. The junction box is detachably connected to the support seat.

[0008] Optionally, the support base has a sliding connection part and a support part. The sliding connection part is slidably connected to the slide rail. A buckle is provided on the side of the sliding connection part facing the end of the slide rail. A corresponding groove is provided on the end of the slide rail near that side. The support part is fixed on the sliding connection part. The junction box and the support part are detachably connected.

[0009] Optionally, the frame includes a base beam and a movable beam. The base beam is set on the foundation surface of the building roof, and the movable beam is rotatably installed on one end of the base beam. A retractable diagonal brace is set on the other end of the base beam. The end of the movable beam away from the base beam is rotatably connected to the diagonal brace, and the crossbeam is installed on the movable beam.

[0010] Optionally, the support assembly further includes a pressure plate, which is pressed and fixed to the foundation surface of the building roof by counterweights on both sides, and the pressure plate has an upwardly protruding groove in the middle, the cross-sectional shape of the groove matching the cross-sectional shape of the base beam, and the middle section of the base beam passing through the groove.

[0011] Optionally, the fastening assembly includes a fixing part, a clamping part, and a clamping bolt. The fixing part is disposed on the crossbeam, the clamping part is disposed opposite to the fixing part, and the clamping part can move relative to the fixing part along the thickness direction of the photovoltaic panel assembly. The clamping bolt is disposed between the fixing part and the clamping part to control the clamping part to move closer to or away from the fixing part.

[0012] Optionally, the side of the crossbeam facing the photovoltaic panel is provided with a groove, the groove extending in the same direction as the length of the crossbeam, and multiple sets of the locking components are provided, which are embedded in the groove by a slider integrally formed at the bottom.

[0013] Optionally, the output end of the junction box is connected to a cable, and the output ends of each photovoltaic panel of the photovoltaic panel group are electrically connected to the input end of the corresponding junction box through the cable. The output ends of adjacent junction boxes are connected in series through the cable. A groove is provided on the side wall of the crossbeam, and the cable is embedded in the groove. A cover plate is detachably covered on the side of the crossbeam where the groove is provided.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. By setting a pull-out structure along the height direction at the corresponding photovoltaic panel wiring position on the crossbeam, the junction box can be detachably installed on the moving end of the pull-out structure. During maintenance, there is no need to disassemble the photovoltaic panel. The junction box can be pulled down vertically along the slide rail to expose it simply by unlocking the buckle, which shortens maintenance time and significantly reduces operation and maintenance costs. Attached Figure Description

[0016] Figure 1 This is a side view structural diagram of an embodiment of this application.

[0017] Figure 2 This is a side view cross-sectional structural diagram of an embodiment of this application.

[0018] Figure 3 This is a partial frontal cross-sectional structural schematic diagram of an embodiment of this application.

[0019] Figure 4 yes Figure 2A magnified schematic diagram of the structure at point A in the middle.

[0020] Figure 5 yes Figure 3 Enlarged schematic diagram of the structure at point B.

[0021] Reference numerals: 1. Support assembly; 11. Frame; 111. Base beam; 112. Movable beam; 113. Diagonal brace; 12. Crossbeam; 123. Cover plate; 13. Pressure plate; 132. Counterweight; 2. Photovoltaic panel assembly; 3. Junction box; 4. Fastening assembly; 41. Fixing part; 42. Pressing part; 43. Pressing bolt; 411. Slider; 5. Pull-out structure; 51. Fixing frame; 52. Bearing seat; 521. Sliding connection part; 522. Bearing part; 53. Slide rail; 6. Cable. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] This application discloses a building rooftop photovoltaic (PV) power generation module, the core objective of which is to overcome the drawback of traditional PV module junction box maintenance requiring the removal of the PV panels. (Refer to...) Figure 1 A building rooftop photovoltaic (PV) power generation module includes a support assembly 1, a photovoltaic panel assembly 2, a pull-out structure 5, and a junction box 3. The support assembly serves as the load-bearing foundation, used to stably fix the entire module to the building roof foundation surface. The photovoltaic panel assembly 2, as the power generation core, is installed on the crossbeam 12 of the support assembly 1 via a dedicated fastening assembly 4, realizing the conversion of solar energy into electrical energy. The junction box 3, as the power transmission hub, is detachably installed via a vertical pull-out structure 5 along the height direction of the crossbeam 12, ensuring reliable electrical connection with the photovoltaic panel assembly 2 while allowing for quick removal without disassembling the panels during maintenance.

[0024] Reference Figure 2 The support assembly 1 is the core of the entire photovoltaic power generation module, consisting of three interconnected components: the frame 11, the crossbeam 12, and the pressure plate 13. The frame 11 connects the roof foundation to the crossbeam 12 and comprises a base beam 111, a movable beam 112, and a telescopic brace 113. The base beam 111 is fixed to the building's fixed concrete foundation or corrugated steel roof via the pressure plate 13, avoiding direct welding or drilling that could damage the roof structure. One end of the movable beam 112 is rotatably connected to the top of the base beam 111 via a stainless steel hinge, allowing it to rotate up and down around the hinge. The other end is rotatably connected to the top of the brace 113 via a pin. The brace 113 adopts a "screw-nut telescopic structure," with its bottom fixed to a pre-set ear plate at the end of the base beam 111 via stainless steel bolts. Tightening the adjusting bolt in the middle of the brace 113 changes its length, thereby adjusting the angle between the movable beam 112 and the horizontal plane. The preferred angle adjustment range is 15°-30°.

[0025] The pressure plate 13 serves as a fixing component between the base beam 111 and the roof foundation surface, providing constraint and positioning for the base beam 111 while preventing damage to the roof waterproofing layer. It is made of steel plate with a U-shaped groove protruding upwards in the center. The groove's dimensions are matched to the cross-section of the base beam 111, with a 1mm gap reserved. This ensures the base beam 111 is stably embedded in the groove while allowing for minor horizontal adjustments during installation, ensuring the parallelism of multiple base beams 111. A cast iron counterweight 132 is installed on each side of the pressure plate 13. The counterweights 132 are fixedly connected to the pressure plate using expansion bolts. The weight of the counterweights 132 secures the frame 11 and improves its wind resistance, preventing the entire support assembly 1 from shifting under strong winds.

[0026] Furthermore, the crossbeam 12 serves as the connecting component between the frame 11 and the photovoltaic panel group 2, bearing the weight of the photovoltaic panel group 2 and providing the installation and positioning function for the pull-out structure 5. At least two crossbeams 12 are provided, positioned near the bottom and top of the frame 11 respectively. It is understood that multiple frames 11 can be provided along the length of the crossbeam 12 to improve support stability. Mounting holes for installing the pull-out structure 5 are pre-drilled in the area on the side wall of the crossbeam 12 corresponding to the wiring position of the photovoltaic panel group 2.

[0027] Reference Figure 2 , Figure 3 and Figure 4 The pull-out structure 5 is arranged along the height direction of the crossbeam 12 and has a movable end that can move back and forth. The junction box 3 can be detachably installed on the movable end. The pull-out structure 5 includes a fixed frame 51, a bearing seat 52 and a slide rail 53. The fixed frame 51 is the connecting part between the pull-out structure 5 and the crossbeam 12. It adopts two sets of symmetrically arranged aluminum alloy plates and is fixed to the side wall of the crossbeam 12 by stainless steel bolts. The slide rail 53 is welded and fixed on the opposite side of the two sets of fixed frames 51. The upper and lower ends of the inner side of the slide rail are provided with anti-detachment flanges to prevent the bearing seat 52 from detaching from the slide rail 53 during the vertical pull-out process.

[0028] The support base 52 includes two parts: a sliding connection part 521 and a support part 522. The sliding connection part 521 is a U-shaped plate that is slidably fastened to the slide rail 53. The U-shaped opening is adapted to the slide rail 53. The buckle is integrally formed on the side facing the end of the slide rail 53. A self-lubricating wear-resistant pad is pasted on the inner side of the U-shaped plate that fits against the slide rail to ensure smooth vertical pulling without jamming. The support part 522 is a U-shaped support plate, which is fixed to the inner side of the sliding connection part 521 by stainless steel bolts. The junction box 3 is fixed to the support part 522 by self-tapping screws. The output end of each photovoltaic panel of the photovoltaic panel group 2 is electrically connected to the input end of the corresponding junction box 3 through a cable. The output end of the junction box 3 is connected to the cable 6. A U-shaped groove is opened in the length direction of the side wall of the beam 12. The cable 6 is embedded in the U-shaped groove and extends to the adjacent junction box 3 and connects to realize the collection and transmission of electrical energy of the photovoltaic panel group 2. A cover plate 123 is attached to one side of the crossbeam 12 with a U-shaped groove by a snap fastener. Waterproof adhesive strips are pasted on the edge of the cover plate 123. By covering the crossbeam 12 with the cover plate 123, a sealed space is formed inside the U-shaped groove to prevent rainwater and dust from seeping in and damaging the cable.

[0029] Furthermore, two sets of symmetrically arranged elastic buckles are integrally formed on the side of the sliding connection 521 facing the end of the slide rail. Correspondingly, a matching groove is provided at the end of the slide rail 53 near this side, with rounded edges to prevent stress breakage when the buckles are engaged. When the support seat 52 is pushed along the slide rail 53 to the photovoltaic panel group 2 and aligned, the buckles undergo elastic deformation due to the pressure from the inside of the slide rail. When it slides to the groove position, the buckles automatically spring into the groove, locking the support seat 52 and the slide rail 53. To unlock, a certain amount of external force is applied to the sliding connection 521 to force the buckles to disengage from the groove, thus moving the support seat 52. The specific structure and engagement method of the buckles and grooves are common knowledge and are not specifically limited here.

[0030] The photovoltaic panel array 2 is specifically composed of multiple monocrystalline silicon photovoltaic panels spliced ​​together to form a continuous power generation array. The photovoltaic panel array 2 is fixed by the clamping components 4, which are spaced apart along the length of the crossbeam 12 to ensure that the photovoltaic panel array 2 is subjected to uniform stress and avoid local stress concentration that could lead to photovoltaic panel breakage. The number of junction boxes 3 is the same as the number of photovoltaic panels and corresponds one-to-one. With the cooperation of the junction boxes 3 and cables 6, the photovoltaic panels are connected in series.

[0031] Reference Figure 3 and Figure 5The clamping assembly includes a fixing part 41, a clamping part 42, and a clamping bolt 43. A T-shaped groove is provided on the side of the crossbeam 12 facing the photovoltaic panel 2. The bottom of the fixing part 41 is integrally formed with a T-shaped slider that matches the groove. After the slider is embedded in the groove, it can slide along the groove to adjust the position of the clamping assembly 4 according to the size of the photovoltaic panel 2, thereby improving the adaptability of the assembly. The clamping part 42 is an L-shaped aluminum alloy plate. Its horizontal section corresponds to the fixing part 41, and its vertical section fits against the edge of the photovoltaic panel 2 to achieve vertical displacement constraint of the photovoltaic panel. The clamping bolt 43 is threaded through a pre-set threaded hole in the fixing part 41, and its top end abuts against the horizontal section of the clamping part 42. When the clamping bolt 43 is tightened, the bolt can push the clamping part 42 to move along the thickness direction of the photovoltaic panel 2. When the vertical section of the clamping part 42 fits against the edge of the photovoltaic panel, the clamping bolt is tightened further to clamp the edge of the photovoltaic panel between the fixing part 41 and the clamping part 42.

[0032] In a normal power generation scenario, the photovoltaic panel 2 absorbs solar energy and converts it into direct current (DC). The electrical energy is transmitted to the input terminal of the junction box 3 through the plug at the output terminal of the photovoltaic panel 2. The output terminals of adjacent junction boxes 3 are connected in series via cables 6 to form a complete photovoltaic array power supply circuit. Finally, the power is transmitted to the inverter for inversion (converting it into alternating current) through the main cable. At this time, the junction box 3 is pushed into the docking position with the photovoltaic panel 2 along with the support base 52. The double latches 5212 of the pull-out structure 5 automatically spring into the preset slots of the slide rail 53, locking the support base 52. The cables 6 are embedded in the grooves of the crossbeam 12. After the cover plate 123 is closed, it becomes waterproof and dustproof, ensuring the reliability of power transmission.

[0033] When junction box 3 experiences faults such as poor contact or terminal oxidation and requires repair, maintenance personnel should lift the support base 52 with both hands and pull it vertically downwards along the slide rail 53. The clips will disengage from the slots, and the support base 52 will move downwards along the slide rail, so that junction box 3 is fully exposed below the crossbeam 12. Terminal testing and replacement of junction box 3 can then be performed. After the repair is completed, push the support base 52 upwards along the slide rail 53 to re-engage the clips into the slots.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A building rooftop photovoltaic power generation module, comprising a support assembly and photovoltaic panels, wherein the photovoltaic panels are mounted on the support assembly, characterized in that: The support assembly includes a frame and a crossbeam. The frame is set on the foundation surface of the building roof, and the crossbeam is laid on the frame. The crossbeam is equipped with a fastening component, and the photovoltaic panel group is fixed to the crossbeam by the fastening component. A pull-out structure is provided at the wiring position of the photovoltaic panel group on the crossbeam. The pull-out structure has a movable end that can move back and forth along the height direction of the crossbeam. The movable end is detachably installed with a junction box.

2. The building rooftop photovoltaic power generation module according to claim 1, characterized in that: The pull-out structure includes a fixed frame and a support seat. The fixed frame is fixedly installed on the side wall of the crossbeam. There are two sets of fixed frames distributed opposite each other. Each side of the two sets of fixed frames is provided with a slide rail. The support seat is slidably installed on the slide rail. The junction box is detachably connected to the support seat.

3. The building rooftop photovoltaic power generation module according to claim 2, characterized in that: The support base has a sliding connection part and a support part. The sliding connection part is slidably connected to the slide rail. A buckle is provided on the side of the sliding connection part facing the end of the slide rail. A corresponding groove is provided on the end of the slide rail near that side. The support part is fixed on the sliding connection part. The junction box is detachably connected to the support part.

4. The building rooftop photovoltaic power generation module according to claim 1, characterized in that: The frame includes a base beam and a movable beam. The base beam is set on the foundation surface of the building roof. The movable beam is rotatably installed on one end of the base beam. A retractable diagonal brace is set on the other end of the base beam. The end of the movable beam away from the base beam is rotatably connected to the diagonal brace. The crossbeam is installed on the movable beam.

5. The building rooftop photovoltaic power generation module according to claim 4, characterized in that: The support assembly also includes a pressure plate, which is pressed and fixed to the foundation surface of the building roof by counterweights on both sides. The pressure plate has an upward-protruding groove in the middle, the cross-sectional shape of which matches the cross-sectional shape of the base beam, and the middle section of the base beam passes through the groove.

6. The building rooftop photovoltaic power generation module according to claim 1, characterized in that: The fastening assembly includes a fixing part, a clamping part, and a clamping bolt. The fixing part is disposed on the crossbeam, and the clamping part is disposed opposite to the fixing part. The clamping part can move relative to the fixing part along the thickness direction of the photovoltaic panel assembly. The clamping bolt is disposed between the fixing part and the clamping part to control the clamping part to move closer to or away from the fixing part.

7. The building rooftop photovoltaic power generation module according to claim 1, characterized in that: The side of the crossbeam facing the photovoltaic panel is provided with a sliding groove, and the extension direction of the sliding groove is consistent with the length direction of the crossbeam. Multiple sets of the locking components are provided, and the multiple sets of locking components are embedded in the sliding groove by a slider integrally formed at the bottom.

8. The building rooftop photovoltaic power generation module according to claim 1, characterized in that: The output end of the junction box is connected to a cable. The output end of each photovoltaic panel of the photovoltaic panel group is electrically connected to the input end of the corresponding junction box through the cable. The output ends of adjacent junction boxes are connected in series through the cable. A groove is provided on the side wall of the crossbeam, and the cable is embedded in the groove. A cover plate is detachably covered on the side of the crossbeam where the groove is provided.

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