Combined photovoltaic combiner box

Abstract

The present invention belongs to the technical field of combiner boxes, and in particular, relates to a combined photovoltaic combiner box, including a box assembly and a support assembly, wherein the box assembly is used to conduct positive and negative polarization convergence of photovoltaic panel outputs, and the support assembly is used to suspend and fix the box assembly at a setting point. The present invention can increase the corresponding number and perform combined installation according to the increased demand for solar panels in the later stage of solar panel engineering planning, and the adjacent box assemblies that need to be combined and installed can be electrically connected to each other by simply plugging in the connecting assembly, and the connection process is simple and convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of combiner boxes, and in particular relates to a combined photovoltaic combiner box. Background Art

[0002] The combiner box plays an important role in the photovoltaic power generation system. Its main function is to ensure the orderly connection and convergence of photovoltaic modules. The combiner box can connect a certain number of photovoltaic cells of the same specifications in series to form a photovoltaic string, and then connect multiple photovoltaic strings in parallel to the combiner box, and finally connect to the mains through the controller, DC distribution cabinet, photovoltaic inverter and AC distribution cabinet.

[0003] Solar panels are mostly installed in mountainous areas with more geological disasters to make full use of natural resources. When geological disasters such as landslides or rolling stones occur in the mountainous areas where solar panels are located, the solar panels will be hit and damaged, and the electrical systems related to the solar panels, such as the junction box, will also be hit and fall. The solar panels will most likely be damaged after being hit. The damage to the solar panels will cause the circuit breaker in the junction box to trip, thereby protecting the entire system. However, if the junction box is hit and causes a large-scale damage and short circuit, it will cause the entire solar panel connected to the junction box to fail, and this failure is irreversible. For example, in the patent with application number 202021955169.X, the short circuit caused by damage to the junction box itself cannot be solved.

[0004] The body of the combiner box is generally made of panels welded together, and there are many types of manufacturing processes. The combiner box will be deformed due to the thermal stress generated during welding, which will cause the sealed space inside the combiner box to be destroyed, resulting in water ingress. For example, the patent with application number 201410454015.5 designs a combiner box that does not require welding and cold processing. Its idea of ​​effectively reducing welding points and using PVC sealing strips can be used as a reference.

[0005] Solar panel project planning is generally phased and area-based, that is, photovoltaic panels and junction boxes for installing related electrical components will be added in the later stage according to actual needs. The junction boxes are generally placed separately, but in special places such as mountain slopes, there are fewer suitable layout points and multiple junction boxes are arranged together. Multiple junction boxes are connected by wires, and the wire connection process is complicated, which affects the later maintenance.

[0006] The sealing of the combiner box is very important. If the sealing of the combiner box is not good, the electrical contacts in the combiner box will frost in cold weather, causing failures. For example, the patent with application number 202221372789.X emphasizes the importance of the sealing of the combiner box.

[0007] The present invention designs a deformable sealed junction box which can effectively buffer the impact it receives to solve the above problems. Summary of the invention

[0008] Based on this, it is necessary to provide a combined photovoltaic junction box to address the problems existing in the current junction box. The front panel and top panel, top panel and back panel, back panel and bottom panel, and bottom panel and front panel of the box assembly in the present invention are all hinged rather than welded. The manufacturing process is simple, which can effectively prevent the box assembly from being deformed due to thermal stress during welding manufacturing, and effectively prevent the internal sealed space of the box assembly from being destroyed due to thermal stress deformation caused by the welding process. The box assembly in the present invention is installed at a setting point in a mountainous area with the back plate facing the mountain slope. The support assembly in the present invention will drive the box assembly to fall down after being hit by falling rocks on the mountain slope. After the box assembly falls down, it will undergo an adaptive parallelogram deformation due to the impact of the impact. The falling of the support assembly and the box assembly and the parallelogram deformation of the box assembly will effectively buffer the impact on the box. The electrical components in the deformed box assembly will move synchronously with the back plate because they are installed on the back plate and will not be squeezed or hit, protecting the electrical components in the box from being damaged, ensuring that the entire electrical system will not be damaged and that a large-scale short circuit fault will not be caused by damage to the junction box. The present invention can increase the corresponding number and perform combined installation according to the increased demand for solar panels in the later stage of solar panel engineering planning, and the adjacent box assemblies that need to be combined and installed can be electrically connected by simply plugging in the connecting assembly, and the connection process is simple and convenient. After multiple combinations are installed, the present invention can be efficiently and quickly located and detected for fault points and repaired in the subsequent maintenance process because the electrical connection is simple and uncomplicated, and the method for locating and detecting the fault points is simple and convenient. The box assembly of the present invention has an effective sealing structure between the top plate, back plate, bottom plate, front panel, first side plate and second side plate that are hinged in sequence, so that the back plate of the box assembly always maintains good sealing before and after being hit by falling rocks, effectively preventing the electric contacts in the box assembly from frosting and causing poor contact in low temperature weather. The waterproof and breathable valve and its switch structure of the box assembly in the present invention will fail before and after it is deformed into a parallelogram, resulting in the space in the box assembly being closed due to deformation and unable to effectively release pressure. The two second side plates are hinged to the top plate. When the inner wall pressure reaches a certain limit, the elastic force of the second leaf spring between the top plate and the second side plate will be overcome to make the second side plate open for pressure release, thereby avoiding the explosion of the box assembly, so that the present invention has a good explosion-proof function after deformation.

[0009] The above purpose is achieved through the following technical solutions:

[0010] A combined photovoltaic combiner box, used for primary combiner output of photovoltaic panels, comprises:

[0011] A box assembly is used for performing positive and negative polarization convergence of photovoltaic panel outputs, the box assembly includes a front panel, the upper and lower ends of the front panel are respectively hinged with a top panel and a bottom panel through a hinge shaft, a back panel parallel to the front panel is hinged between the rear ends of the top panel and the bottom panel through a hinge shaft, two sides of the front panel are bent through a sheet metal process to form two first side panels that shield the two sides of the space between the front panel and the back panel, two sides of the top panel are hinged with two second side panels that are swung on the top panel to shield the two sides of the space between the front panel and the back panel, and a second side panel is connected between the second side panel and the top panel to make them close to each other Leaf spring, the top plate and the bottom plate respectively cooperate with the upper end of the first side plate and the inner side card strip of the lower end of the first side plate, the back plate cooperates with the inner side card strip of the rear end of the first side plate, and a first leaf spring is connected between the bottom plate and the front panel to press the bottom plate and the back plate against the lower end card strip of the first side plate and the rear end card strip respectively, a plurality of clamping components for limiting the bottom plate and the back plate are arranged on the first side plate, a circuit control component for controlling and converging the circuit introduced by the photovoltaic panel is installed on the back plate, a door panel for opening and closing the box port on the front panel is hingedly connected to the front panel, and a waterproof and breathable valve is arranged on the bottom plate.

[0012] The support assembly is used to suspend and fix the box assembly at a setting point. When the support assembly is subjected to a severe lateral impact, it performs non-destructive bending and drives the box assembly to swing to a certain amplitude for buffering protection.

[0013] In one embodiment, a sealing strip cooperating with the top plate is provided at the upper end of the second side panel, three sealing strips cooperating with the bottom plate are provided on the card strip on the inner side of the lower end of the second side panel, three sealing strips cooperating with the back plate are provided on the card strip on the inner side of the rear end of the second side panel, a quadrilateral sealing groove is provided on the inner side of the box opening, and a first sealing gasket cooperating with the door panel is provided in the sealing groove.

[0014] In one embodiment, the circuit control component includes an isolating switch, the positive and negative input points of the isolating switch are respectively connected to several pairs of first waterproof connectors on the base plate through wires, each pair of the first waterproof connectors are respectively connected to the positive and negative output points of the corresponding photovoltaic panel through wires, the positive and negative output points of the isolating switch are respectively connected to two second waterproof connectors on the base plate through wires, fuses and circuit breakers are sequentially arranged on the wires connecting the first waterproof connectors and the isolating switch, the wires connecting the circuit breaker and the isolating switch are connected to a lightning arrester, all of the lightning arresters are connected to the third waterproof connector on the base plate through wires, the third waterproof connector is grounded through wires, and the fuses, circuit breakers, lightning arresters and isolating switches are installed on a mounting frame on the back plate.

[0015] In one of the embodiments, the two first side panels of the box assembly are respectively provided with a connecting component that connects the two positive and negative output points of the isolating switch in other box assemblies to the two positive and negative input points of the isolating switch in itself, and a connecting component that connects the two positive and negative output points of the isolating switch in itself to the two positive and negative input points of the isolating switch in other box assemblies.

[0016] In one of the embodiments, the connecting assembly includes a connecting tube, which is fixed to a connecting hole on the inner wall of the second side plate by connecting bolts. Two connecting plugs are arranged in the connecting tube. The two connecting plugs are respectively connected to the positive and negative output points of the isolating switch by wires. The wires connecting the connecting plugs and the isolating switch are fixed to the circular hole at the end of the connecting tube by a sealing sleeve. A cover plate for shielding the connecting hole is installed at the connecting hole by connecting bolts.

[0017] In one of the embodiments, a strap is provided at the movable end of the door panel, and the strap cooperates with the hanging ear on the front panel.

[0018] In one of the embodiments, the hinged end of the front panel or top panel or back panel or bottom panel is provided with a plurality of circular sleeves distributed at intervals and cooperating with the hinge axis through sheet metal processing, and a rotation groove cooperating with the circular sleeves on the adjacent hinged panels is formed between adjacent circular sleeves. The bottom of the rotation groove is provided with a first rotation seat cooperating with the circular sleeves on the adjacent hinged panels through sheet metal processing, and a second sealing gasket cooperating with the circular sleeve is provided on the first rotation seat and the side wall of the rotation groove.

[0019] In one embodiment, the clamping assembly includes a second clamping block arranged on the base plate or the back plate, and the second clamping block is provided with a fourth inclined surface that cooperates with a locking screw threadedly connected to the first side plate, and the fourth inclined surface cooperates with the corresponding locking screw to press the back plate or the base plate against the corresponding clamping strip, and the cooperation between the fourth inclined surface and the corresponding locking screw does not interfere with the movement of the base plate or the back plate.

[0020] In one of the embodiments, the adjacent box assemblies are combined by connecting a connecting plate between two bottom plates or two top plates, and the connecting plate is connected to the bottom plates or top plates of two adjacent box assemblies by connecting bolts.

[0021] The lockhole that is formed on the two ends of the second sprocket wheel is formed on the second sprocket wheel, and the second sprocket wheel is connected with the second end of the second sprocket wheel by the spring or the screw thread. A second claw that cross-coordinates with the first claw, and the first claw and the second claw are respectively in a downward tilted and upward state when the two are cross-engaged with each other, a first locking bolt is arranged in the threaded hole on the first claw, and a first swivel seat is rotatably arranged on the upper end of the first locking bolt, and an inclined plate is arranged on the first swivel seat, a compression spring is connected between the lower end of the first locking bolt and the first claw, a first clamping block is matched between the first claw and the second claw, and a first inclined surface that cooperates with the first claw, a second inclined surface that cooperates with the second claw, and a third inclined surface that cooperates with the inclined plate are arranged on the first clamping block, a plurality of wire clips for fixing the wires are arranged on the first support rod, and a base is arranged at the lower end of the second support rod, and the base is fixed at the setting point in the mountainous area by fixing bolts.

[0022] The beneficial effects of the present invention are:

[0023] 1. The front panel and top panel, the top panel and back panel, the back panel and bottom panel, and the bottom panel and front panel of the box assembly in the present invention are all hinged rather than welded, so the manufacturing process is simple, which can effectively prevent the box of the box assembly from being deformed due to thermal stress during welding and effectively prevent the internal sealed space of the box assembly from being damaged due to thermal stress deformation caused by the welding process.

[0024] 2. The box assembly in the present invention is installed at a setting point in the mountainous area with the back plate facing the mountain slope. The support assembly in the present invention will drive the box assembly to topple over after being hit by falling rocks on the mountain slope. After toppling over, the box assembly will undergo an adaptive parallelogram deformation due to the impact. The toppling of the support assembly and the box assembly and the parallelogram deformation of the box assembly will effectively buffer the impact on the box. The electrical components in the deformed box assembly will move synchronously with the back plate because they are installed on the back plate and will not be squeezed or hit, thereby protecting the electrical components in the box from damage, ensuring that the entire electrical system will not be damaged and that large-scale short-circuit failures will not be caused by damage to the junction box.

[0025] 3. The present invention can increase the corresponding number of solar panels and perform combined installation according to the increased demand for solar panels in the later stage of solar panel project planning, and the adjacent box components that need to be installed in combination can be electrically connected by simply plugging the connecting components, and the connection process is simple and convenient.

[0026] 4. After multiple combinations are installed, the present invention can be used to efficiently and quickly locate faults and perform repairs in the subsequent maintenance process because the electrical connection is simple and uncomplicated, and the method for locating the faults is simple and convenient.

[0027] 5. The box assembly of the present invention has an effective sealing structure between the top plate, back plate, bottom plate, front plate, first side plate and second side plate which are hinged in sequence, so that the back plate of the box assembly always maintains good sealing before and after being hit by falling rocks, and effectively prevents the electric contacts in the box assembly from frosting and causing poor contact in low temperature weather.

[0028] 6. The waterproof breathable valve and its switch structure of the box assembly in the present invention will fail before and after it undergoes parallelogram deformation, causing the space inside the box assembly to be closed due to deformation and unable to effectively relieve pressure. The two second side panels are hinged with the top panel, and when the inner wall pressure reaches a certain limit, they will overcome the elastic force of the second leaf spring between the top panel and the second side panels, causing the second side panels to open for pressure relief, thereby avoiding explosion of the box assembly, thereby enabling the present invention to have better explosion-proof function after deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an overall schematic diagram of the present invention from two viewing angles;

[0030] Figure 2 This is a schematic diagram of the box door opening state of the present invention;

[0031] Figure 3 It is the cooperation between the upper plate of the door and the hanging ears on the front plate and the cross-sectional view thereof;

[0032] Figure 4 is a cross-sectional view of the structural arrangement of the box assembly of the present invention;

[0033] Figure 5 is a cross-sectional view of a connection assembly in the present invention;

[0034] Figure 6 It is a partial cross-sectional view of the cooperation between the bottom plate and the first side plate in the box assembly of the present invention;

[0035] Figure 7 It is a cross-sectional view of the top plate, the first side plate and the second side plate in the box assembly of the present invention;

[0036] Figure 8 is a side sectional view of a box assembly of the present invention;

[0037] Fig. 9 It is a cross-sectional view of the matching of the box door and the front panel, and the front panel and the top panel in the box assembly of the present invention;

[0038] Fig.10 It is a cross-sectional view of the top plate and the back plate in the box assembly of the present invention;

[0039] Fig.11 It is a cross-sectional view of the cooperation between the first side plate and the back plate in the box assembly of the present invention;

[0040] Fig.12 It is a cross-sectional view of the cooperation between the front panel and the bottom panel in the box assembly of the present invention;

[0041] Fig.13 It is a cross-sectional view of the cooperation between the bottom plate and the back plate in the box assembly of the present invention;

[0042] Fig.14 is a top cross-sectional view of a box assembly of the present invention;

[0043] Fig.15 It is a partial schematic diagram of the support assembly in the present invention;

[0044] Fig.16 are two partial cross-sectional views of the support assembly of the present invention;

[0045] Fig.17 This is a schematic diagram of the first card block of the support assembly in the present invention;

[0046] Fig.18 It is a schematic diagram of the front panel structure of the box assembly in the present invention;

[0047] Fig.19 is a cross-sectional view of the front panel of the box assembly of the present invention;

[0048] Fig. 20 It is a partial structural diagram of the first side plate of the box assembly in the present invention;

[0049] Fig.21 It is a schematic diagram of the top plate and the second side plate of the box assembly in the present invention;

[0050] Fig. 22 Two partial views of the structure of the hinge of the front panel, top panel, bottom panel or back panel of the box assembly;

[0051] Fig.23 A cross-sectional view of the front panel and the top panel, the top panel and the back panel, the back panel and the bottom panel, or the bottom panel and the front panel;

[0052] Fig.24 It is a schematic diagram of the combined state of the present invention;

[0053] Fig.25It is a schematic diagram of the present invention toppling over and deforming under the action of implementation on a mountain slope;

[0054] Fig.26 It is a cross-sectional view of the connection state of the connecting components in the adjacent box components after the combination of the present invention;

[0055] Fig. 27 These are two partial views of the connection of adjacent box components after the combination of the present invention;

[0056] Name of the label in the figure:

[0057] 100, support assembly; 101, bracket; 102, first support rod; 103, first ear; 104, first claw; 105, first locking bolt; 106, first swivel seat; 107, inclined plate; 108, compression spring; 109, second support rod; 110, second ear; 111, second locking bolt; 112, pressure plate; 113, second claw; 114, elastic pad; 115, first clamping block; 116, first inclined plane; 117, second inclined plane; 118, third inclined plane; 119, line clamp; 120, base; 121, fixing bolt;

[0058] 200, box assembly; 201, front panel; 202, box opening; 203, sealing groove; 204, first sealing gasket; 205, hanging ear; 206, door panel; 207, strap; 208, round sleeve; 209, rotating groove; 210, second rotating seat; 211, second sealing gasket; 212, hinge axis; 213, first side panel; 214, connecting hole; 215, card strip; 216, sealing strip; 217, connecting tube; 218, connecting bolt; 219, cover plate; 220, sealing sleeve; 221, connecting plug; 222, bottom plate; 2 ...4, connecting hole; 215, card strip; 216, sealing strip; 217, connecting tube; 218, connecting bolt; 219, cover plate; 220, sealing sleeve; 221, connecting plug; 222, bottom plate; 223, first a leaf spring; 224, a top plate; 225, a second side plate; 226, a second leaf spring; 227, a back plate; 228, a connecting assembly; 229, a clamping assembly; 230, a locking screw; 231, a second clamping block; 232, a fourth inclined plane; 233, a waterproof breathable valve; 234, a fuse; 235, a circuit breaker; 236, a lightning arrester; 237, an isolating switch; 238, a first waterproof joint; 239, a second waterproof joint; 240, a third waterproof joint; 241, a mounting frame; 242, a gasket; 243, a connecting plate; 244, a circuit control assembly;

[0059] 301. Mountain slope; 302. Falling rocks. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0061] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0062] 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.

[0063] like Figure 1-27 As shown, a combined photovoltaic combiner box is used for primary combiner output of photovoltaic panels, including:

[0064] The box assembly 200 is used for performing positive and negative polarization and convergence of the photovoltaic panel output. The box assembly 200 includes a front panel 201. The upper and lower ends of the front panel 201 are respectively hinged with a top panel 224 and a bottom panel 222 through a hinge shaft 212. A back panel 227 parallel to the front panel 201 is hinged between the rear ends of the top panel 224 and the bottom panel 222 through the hinge shaft 212. Two sides of the front panel 201 are bent by a sheet metal process to form two first side panels 213 for shielding both sides of the space between the front panel 201 and the back panel 227. Two sides of the top panel 224 are hinged to form two second side panels 225 for shielding both sides of the space between the front panel 201 and the back panel 227 after being swung on the top panel 224. A second leaf spring 226 is connected between the second side panel 225 and the top panel 224 to make them close to each other. The top plate 224 and the bottom plate 222 cooperate with the upper end of the first side plate 213 and the inner side of the lower end of the first side plate 213 respectively, and the back plate 227 cooperates with the inner side of the card strip 215 at the rear end of the first side plate 213. A first leaf spring 223 is connected between the bottom plate 222 and the front panel 201 to press the bottom plate 222 and the back plate 227 against the lower end card strip 215 of the first side plate 213 and the rear end card strip 215 respectively. The first side plate 213 is provided with a plurality of clamping components 229 for limiting the bottom plate 222 and the back plate 227. A circuit control component 244 for controlling and converging the circuit introduced by the photovoltaic panel is installed on the back plate 227. A door panel 206 for opening and closing the box port 202 on the front panel 201 is hingedly connected to the bottom plate 222. A waterproof and breathable valve 233 is provided on the bottom plate 222.

[0065] The support assembly 100 is used to suspend and fix the box assembly 200 at a setting point. When the support assembly 100 is subjected to a severe lateral impact, it is non-destructively bent and drives the box assembly 200 to swing to a certain amplitude for buffering protection.

[0066] In a further embodiment, Figure 2 , 6 As shown in Figures 7, 8, 9, 11, 12, 14, 18, 19 and 20, a sealing strip 216 cooperating with the top plate 224 is arranged at the upper end of the second side panel 225, three sealing strips 216 cooperating with the bottom plate 222 are arranged on the card strip 215 on the inner side of the lower end of the second side panel 225, three sealing strips 216 cooperating with the back plate 227 are arranged on the card strip 215 on the inner side of the rear end of the second side panel 225, a quadrilateral sealing groove 203 is arranged on the inner side of the box opening 202, and a first sealing gasket 204 cooperating with the door panel 206 is arranged in the sealing groove 203.

[0067] In a further embodiment, Figure 2 , 4As shown in Figure 8, the circuit control component 244 includes an isolating switch 237, and the positive and negative input points of the isolating switch 237 are respectively connected to several pairs of first waterproof connectors 238 on the bottom plate 222 through wires, and each pair of the first waterproof connectors 238 is respectively connected to the positive and negative output points of the corresponding photovoltaic panel through wires, and the positive and negative output points of the isolating switch 237 are respectively connected to two second waterproof connectors 239 on the bottom plate 222 through wires. The wires connecting the first waterproof connectors 238 and the isolating switch 237 are sequentially provided with fuses 234 and circuit breakers 235, and the wires connecting the circuit breaker 235 and the isolating switch 237 are connected with lightning arresters 236. All of the lightning arresters 236 are connected to the third waterproof connectors 240 on the bottom plate 222 through wires, and the third waterproof connectors 240 are grounded through wires. The fuses 234, circuit breakers 235, lightning arresters 236 and isolating switches 237 are installed on the mounting frame 241 on the back plate 227.

[0068] In a further embodiment, Figure 1 , 2 , 4, 6, 8, 18, and 26, the two first side panels 213 of the box assembly 200 are respectively provided with a connecting component 228 for connecting the two positive and negative output points of the isolating switch 237 in other box assemblies 200 to the two positive and negative input points of the isolating switch 237 in itself, and a connecting component 228 for connecting the two positive and negative output points of the isolating switch 237 in itself to the two positive and negative input points of the isolating switch 237 in other box assemblies 200.

[0069] In a further embodiment, Figure 4 , 5 , 18, and 26, the connecting component 228 includes a connecting tube 217, and the connecting tube 217 is fixed to the connecting hole 214 on the inner wall of the second side plate 225 by a connecting bolt 218. Two connecting plugs 221 are arranged in the connecting tube 217, and the two connecting plugs 221 are respectively connected to the positive and negative output points of the isolating switch 237 through wires. The wire connecting the connecting plug 221 and the isolating switch 237 is fixed in the circular hole at the end of the connecting tube 217 through a sealing sleeve 220, and a cover plate 219 for shielding it is installed at the connecting hole 214 by a connecting bolt 218.

[0070] In a further embodiment, Figure 3 , 18 As shown, a strap 207 is provided at the movable end of the door panel 206 , and the strap 207 cooperates with the hanging ear 205 on the front panel 201 .

[0071] In a further embodiment, Fig.18 , 21As shown in FIGS. 22 and 23, the hinged end of the front panel 201 or the top panel 224 or the back panel 227 or the bottom panel 222 is provided with a plurality of circular sleeves 208 distributed at intervals and cooperating with the hinge shaft 212 by means of sheet metal processing, and a rotation groove 209 cooperating with the circular sleeves 208 on the adjacent hinged plate is formed between adjacent circular sleeves 208, and the bottom of the rotation groove 209 is provided with a first rotating seat 106 cooperating with the circular sleeves 208 on the adjacent hinged plate by means of sheet metal processing, and a second sealing gasket 211 sealingly cooperating with the circular sleeve 208 is provided on the first rotating seat 106 and the side wall of the rotation groove 209.

[0072] In a further embodiment, Figure 6 , 11 As shown, the clamping assembly 229 includes a second clamping block 231 arranged on the bottom plate 222 or the back plate 227, and the second clamping block 231 is provided with a fourth inclined surface 232 which cooperates with the locking screw 230 threadedly connected to the first side plate 213, and the fourth inclined surface 232 cooperates with the corresponding locking screw 230 to press the back plate 227 or the bottom plate 222 against the corresponding clamping strip 215, and the cooperation between the fourth inclined surface 232 and the corresponding locking screw 230 does not interfere with the movement of the bottom plate 222 or the back plate 227.

[0073] In a further embodiment, Fig.24 , 27 As shown, the adjacent box assemblies 200 are combined by connecting a connecting plate 243 between two bottom plates 222 or two top plates 224 , and the connecting plate 243 is connected to the bottom plates 222 or top plates 224 of two adjacent box assemblies 200 via connecting bolts 218 .

[0074] In a further embodiment, Figure 1As shown, the support assembly 100 includes a bracket 101, and the bracket 101 is fixedly connected to the front panel 201 and the card strip 215 at the lower ends of the two first side panels 213 in the box assembly 200. A first support rod 102 is arranged in the middle part of the lower side of the bracket 101, and a second support rod 109 is arranged below the first support rod 102. The first ear 103 on one side of the lower end of the first support rod 102 is hinged to the two second ears 110 on one side of the upper end of the second support rod 109 through a second locking bolt 111, and the second locking bolt 111 is threadedly connected to the two second ears 110. A pressing plate 112 cooperating with the first ear 103 is arranged on the second locking bolt 111, and two elastic pads 114 cooperating with each other are arranged on the lower end surface of the first support rod 102 and the upper end surface of the second support rod 109. A first claw 104 fixedly connected to the first support rod 102 is arranged on the opposite side of the first ear 103, and the two second ears 110 are opposite to each other. A second claw 113 is provided on the side which is fixedly connected to the second support rod 109 and cross-matched with the first claw 104, a first locking bolt 105 is provided in the threaded hole on the first claw 104, a first swivel seat 106 is rotatably provided on the upper end of the first locking bolt 105, an inclined plate 107 is provided on the first swivel seat 106, a compression spring 108 is connected between the lower end of the first locking bolt 105 and the first claw 104, a first clamping block 115 is matched between the first claw 104 and the second claw 113, a first inclined surface 116 matched with the first claw 104, a second inclined surface 117 matched with the second claw 113 and a third inclined surface 118 matched with the inclined plate 107 are provided on the first clamping block 115, a plurality of wire clips 119 for fixing the wires are provided on the first support rod 102, a base 120 is provided at the lower end of the second support rod 109, and the base 120 is fixed to the setting point in the mountainous area by a fixing bolt 121.

[0075] The first clamping claw 104 and the second clamping claw 113 in the present invention are matched with each other with a small gap, which effectively limits the first support rod 102 and the second support rod 109 from shaking in the axial direction of the second locking bolt 111 .

[0076] The compression spring 108 in the present invention can effectively prevent the first locking bolt 105 from falling off and needs to be replaced regularly.

[0077] After the strap 207 of the present invention cooperates with the hanging ear 205, the round hole on the strap 207 is inserted into the lock, so that the strap 207 drives the door panel 206 to squeeze the first sealing gasket 204 in the sealing groove 203, thereby achieving the purpose of sealing.

[0078] In the present invention, the second side panel 225 is fan-shaped, and the center of the second side panel 225 is located on the axis of the hinge shaft 212 between the top panel 224 and the front panel 201 .

[0079] Assuming that the distance between the center of the plate surface of the first side plate 213 in the box assembly 200 and the base 120 in the support assembly 100 is L, then the length of the wire connecting the connecting plug 221 in the connecting assembly 228 is two-thirds of L, ensuring that the electrical connection between the two box assemblies 200 passing through the connecting assembly 228 will not be destroyed when the two are separated due to the destruction of the connecting plate 243.

[0080] The front panel 201 and top panel 224, the top panel 224 and back panel 227, the back panel 227 and bottom panel 222, and the bottom panel 222 and front panel 201 of the box assembly 200 in the present invention are all hinged rather than welded, and the manufacturing process is simple, which can effectively prevent the box of the box assembly 200 from being deformed due to thermal stress during welding manufacturing, and effectively prevent the internal sealed space of the box assembly 200 from being destroyed due to thermal stress deformation caused by the welding process. The box assembly 200 in the present invention is installed at a setting point in the mountainous area with the back plate 227 facing the mountain slope 301. The support assembly 100 in the present invention will drive the box assembly 200 to topple over after being hit by the falling rocks 302 on the mountain slope 301. After toppling over, the box assembly 200 will undergo an adaptive parallelogram deformation due to the impact. The toppling of the support assembly 100 and the box assembly 200 and the parallelogram deformation of the box assembly 200 will effectively buffer the impact on the box. The electrical components in the deformed box assembly 200 will move synchronously with the back plate 227 because they are installed on the back plate 227 and will not be squeezed or hit, thereby protecting the electrical components in the box from damage, ensuring that the entire electrical system will not be damaged and that large-scale short circuit failures will not be caused by damage to the junction box. The present invention can increase the corresponding number and perform combined installation according to the increased demand for solar panels in the later stage of solar panel engineering planning, and the adjacent box components 200 that need to be combined and installed can be electrically connected by plugging the connecting component 228, and the connection process is simple and convenient. After multiple combined installations, the present invention can be efficiently and quickly located and detected for fault points and repaired in the subsequent maintenance process because the electrical connection is simple and uncomplicated, and the method for locating and detecting fault points is simple and convenient. The box component 200 of the present invention has an effective sealing structure between the top plate 224, the back plate 227, the bottom plate 222, the front panel 201, the first side plate 213 and the second side plate 225 that are hinged in sequence, so that the back plate 227 always maintains good sealing before and after being hit by the falling rock 302, effectively preventing the electric contact sheet in the box component 200 from frosting and poor contact in low temperature weather. The waterproof breathable valve 233 and its switch structure of the box assembly 200 in the present invention will fail before and after it undergoes parallelogram deformation, causing the space inside the box assembly 200 to be closed due to deformation and unable to effectively relieve pressure. The two second side panels 225 are hinged with the top panel 224. When the inner wall pressure reaches a certain limit, the elastic force of the second leaf spring 226 between the top panel 224 and the second side panel 225 will be overcome, causing the second side panel 225 to open for pressure relief, thereby preventing the box assembly 200 from exploding, thereby enabling the present invention to have better explosion-proof function after deformation.

[0081] The operation process of the present invention is as follows:

[0082] like Fig.24, 25 As shown, the present invention is installed at the desired setting point in the mountainous area by fixing bolts 121 individually or in combination. When multiple combinations of the present invention are installed, the bottom plate 222 and the top plate 224 in all the box assemblies 200 need to be connected in sequence through the connecting plate 243. The support assembly 100 is set at intervals at the lower end of all the box assemblies 200 that are combined and connected together. Regardless of whether it is installed individually or in combination, the first claw 104 on the first support rod 102 and the second claw 113 on the second support rod 109 in the single or multiple combinations that have been installed are opposite to the mountain slope 301, and the back plate 227 in the box assembly 200 is opposite to the mountain slope 301.

[0083] In the initial state, a first clamping block 115 is arranged between the first clamping claw 104 and the corresponding second clamping claw 113 in the support assembly 100, and the first clamping claw 104 and the second clamping claw 113 are respectively tightly attached to the first inclined surface 116 and the second inclined surface 117 of the first clamping block 115, and the inclined plate 107 on the first clamping claw 104 is pressed against the third inclined surface 118 on the first clamping block 115, and the clamping spring 108 is in a compressed state, and the elastic pad 114 at the lower end of the first support rod 102 and the elastic pad 114 at the upper end of the second support rod 109 are squeezed against each other, and the pressure plate 112 on the second locking bolt 111 is laterally pressed against the first ear 103 on the first support rod 102. The front panel 201, top panel 224, bottom panel 222, back panel 227 and two first side panels 213 in the box assembly 200 form a rectangular parallelepiped, the two sides of the bottom panel 222 squeeze the sealing strip 216 on the card strip 215 at the lower ends of the two first side panels 213, the two sides of the back panel 227 squeeze the sealing strip 216 on the card strip 215 at the rear ends of the two first side panels 213, the top panel 224 squeezes the sealing strip 216 at the upper ends of the two first side panels 213, the door panel 206 is located in the sealing groove 203 on the front panel 201 and squeezes the sealing gasket in the sealing groove 203, the two second side panels 225 are respectively pressed against the corresponding first side panels 213 under the action of the corresponding second leaf springs 226, and the first leaf spring 223 and the second leaf spring 226 are in a compressed state.

[0084] In the initial state, if it is a single box assembly 200, then the connection holes 214 on the two first side panels 213 are installed with cover plates 219 through connecting bolts 218. If multiple box assemblies 200 are combined and connected, then the connection holes 214 on the first side panels 213 on both sides of the two box assemblies 200 located on both sides are installed with cover plates 219 through connecting bolts 218, and the two pairs of connecting plugs 221 of the two connecting assemblies 228 on the adjacent sides of any two adjacent box assemblies 200 are plugged in one by one and the connecting holes 214 of the interconnected connecting assemblies 228 are connected with gaskets 242 through connecting bolts 218, and the reserved length of the wire in the connecting tube 217 is large enough.

[0085] In the initial state, the locking screw 230 of the clamping assembly 229 in the box assembly 200 abuts against the fourth inclined surface 232 on the corresponding second clamping block 231 .

[0086] When a landslide occurs on the mountain slope 301, the falling rocks 302 on the mountain slope 301 roll down and hit the first support rod 102 in the support assembly 100, so that the first clamping block 115 between the first clamping claw 104 and the second clamping claw 113 is broken and the first clamping claw 104 and the second clamping claw 113 are released. The first support rod 102 drives the box assembly 200 to fall away from the mountain slope 301 under the impact of the falling rocks 302. When the box assembly 200 is on the first support rod After the box assembly 200 topples under the influence of the falling rock 302, the falling rock 302 impacts the back plate 227 of the box assembly 200. Under the impact of the falling rock 302, the back plate 227 overcomes the limit of the clamping assembly 229 and the elastic force of the first leaf spring 223 to drive the top plate 224 and the bottom plate 222 to deform into a parallelogram relative to the front panel 201. The back plate 227 drives the fuse 234, the circuit breaker 235, the lightning arrester 236 and the isolating switch 237 installed thereon to move synchronously without damaging these electrical components. The top plate 224 drives the two second side plates 225 to move synchronously and effectively seals and blocks the gaps on the upper sides of the two first side plates 213 caused by the movement of the top plate 224, so that the box assembly 200 is still in a sealed and waterproof state after it is deformed.

[0087] When the internal pressure of the deformed box assembly 200 gradually increases due to damage of the waterproof breathable valve 233 on the bottom plate 222 by the impact of the falling rock 302, the pressure inside the box will overcome the elastic force of the second leaf spring 226 between the two second side plates 225 and the top plate 224, causing the two second side plates 225 to swing outward, thereby forming an opening between the top plate 224 of the box and the upper ends of the two first side plates 213, thereby effectively venting the pressure inside the box without causing an explosion, thereby achieving the purpose of explosion-proofing.

[0088] When the box assembly 200 in the present invention is connected in multiple combinations, since the connection between two adjacent box assemblies 200 is completed by plugging two connecting assemblies 228, the combined connection of the box assemblies 200 does not require connecting complex wires, thereby improving the efficiency of the connection combination and facilitating subsequent inspection and maintenance.

[0089] When a plurality of the present inventions connected together are hit by falling rocks 302 from a landslide, the hit present invention will have its connection plate 243 connecting it to an adjacent box assembly 200 destroyed by the falling rocks 302 and will topple over under the action of the falling rocks 302, while the interconnected connection assemblies 228 will not become disconnected because there is enough excess wire.

[0090] The parallelogram deformation of the box assembly 200 can effectively buffer the impact of the falling rocks 302 , thereby reducing the damage caused by the falling rocks 302 to the box assembly 200 .

[0091] When inspecting a plurality of box assemblies 200 connected in combination through the connecting plate 243, the combined plurality of box assemblies 200 are first inspected to quickly find the faulty box assembly 200 and determine the fault point. The inspection process is as follows:

[0092] Assuming that the number of box assemblies 200 connected together is 5, then detection is performed from three points, which are the two second waterproof joints 239 of the first box assembly 200, the two second waterproof joints 239 of the third box assembly 200 and the two second waterproof joints 239 of the fifth box assembly 200, and the electrical quantity of the three detection points is measured through the three detection points respectively.

[0093] Under normal circumstances, if the detection power of the first detection point is A, the detection power of the second detection point is three times A, and the detection power of the third detection point is five times A.

[0094] If the detection power at the first detection point is A, the detection power at the second detection point is less than three times A and is twice A, and the detection power at the third detection point is also less than five times A and is four times A, then it means that the electrical components in the second box assembly 200 or the third box assembly 200 are damaged. At this time, detection is performed from the two second waterproof joints 239 of the second box assembly 200. If the detected detection power is twice A, it means that the electrical components in the third box assembly 200 are damaged. If the detection power detected from the two second waterproof joints 239 of the second box assembly 200 is A, it means that the electrical components in the second box assembly 200 are damaged.

[0095] If the detection power at the first detection point is A, the detection power at the second detection point is three times A, and the detection power at the third detection point is less than five times A and is four times A, then it means that the electrical components in the fourth box assembly 200 or the fifth box assembly 200 are damaged. At this time, detection is performed from the two second waterproof joints 239 of the fourth box assembly 200. If the detected detection power is four times A, it means that the electrical components in the fifth box assembly 200 are damaged. If the detection power detected from the two second waterproof joints 239 of the fourth box assembly 200 is three A, it means that the electrical components in the fourth box assembly 200 are damaged.

[0096] After the faulty box assembly 200 is found by detecting the electrical quantity, the connection assembly 228 between the faulty box assembly 200 and the adjacent box assembly 200 is disconnected, and a new box assembly 200 is replaced and connected via the connection assembly 228 .

Claims

1. A combined photovoltaic combiner box, used for primary confluence of photovoltaic panel output, characterized in that: include: A box assembly is used for performing positive and negative polarization convergence of photovoltaic panel outputs, the box assembly includes a front panel, the upper and lower ends of the front panel are respectively hinged with a top panel and a bottom panel through a hinge shaft, a back panel parallel to the front panel is hinged between the rear ends of the top panel and the bottom panel through a hinge shaft, two sides of the front panel are bent through a sheet metal process to form two first side panels that shield the two sides of the space between the front panel and the back panel, two sides of the top panel are hinged with two second side panels that are swung on the top panel to shield the two sides of the space between the front panel and the back panel, and a second side panel is connected between the second side panel and the top panel to make them close to each other A leaf spring, the top plate and the bottom plate are respectively matched with the card strips at the upper end of the first side plate and the inner side of the lower end of the first side plate, the back plate is matched with the card strips at the inner side of the rear end of the first side plate, a first leaf spring is connected between the bottom plate and the front plate to press the bottom plate and the back plate against the card strips at the lower end and the rear end of the first side plate, the first side plate is provided with a plurality of clamping components for limiting the bottom plate and the back plate, a circuit control component for controlling and converging the circuit introduced by the photovoltaic panel is installed on the back plate, a door plate for opening and closing the upper box port is hinged on the front plate, and a waterproof and breathable valve is provided on the bottom plate; The support assembly is used to suspend and fix the box assembly at a setting point. When the support assembly is subjected to a severe lateral impact, it performs non-destructive bending and drives the box assembly to swing to a certain amplitude for buffering protection.

2. A combined photovoltaic combiner box according to claim 1, characterized in that: A sealing strip cooperating with the top plate is provided at the upper end of the second side panel, three sealing strips cooperating with the bottom plate are provided on the card strip on the inner side of the lower end of the second side panel, three sealing strips cooperating with the back plate are provided on the card strip on the inner side of the rear end of the second side panel, a quadrilateral sealing groove is provided on the inner side of the box opening, and a first sealing gasket cooperating with the door panel is provided in the sealing groove.

3. The combined photovoltaic combiner box according to claim 1, characterized in that: The circuit control component includes an isolating switch, the positive and negative input points of the isolating switch are respectively connected to several pairs of first waterproof connectors on the base plate through wires, each pair of the first waterproof connectors are respectively connected to the positive and negative output points of the corresponding photovoltaic panel through wires, the positive and negative output points of the isolating switch are respectively connected to two second waterproof connectors on the base plate through wires, fuses and circuit breakers are sequentially arranged on the wires connecting the first waterproof connectors and the isolating switch, the wires connecting the circuit breaker and the isolating switch are connected to a lightning arrester, all of the lightning arresters are connected to the third waterproof connector on the base plate through wires, the third waterproof connector is grounded through wires, and the fuses, circuit breakers, lightning arresters and isolating switches are installed on a mounting frame on the back plate.

4. The combined photovoltaic combiner box according to claim 3, characterized in that: The two first side panels of the box assembly are respectively provided with a connecting component for connecting the two positive and negative output points of the isolating switch in other box assemblies to the two positive and negative input points of the isolating switch in itself, and a connecting component for connecting the two positive and negative output points of the isolating switch in itself to the two positive and negative input points of the isolating switch in other box assemblies.

5. The combined photovoltaic combiner box according to claim 4, characterized in that: The connecting assembly includes a connecting tube, which is fixed to a connecting hole on the inner wall of the second side plate by connecting bolts. Two connecting plugs are arranged in the connecting tube. The two connecting plugs are respectively connected to the positive and negative output points of the isolating switch by wires. The wires connecting the connecting plugs and the isolating switch are fixed to the circular holes at the ends of the connecting tube by sealing sleeves. A cover plate for shielding the connecting holes is installed by connecting bolts.

6. The combined photovoltaic combiner box according to claim 1, characterized in that: The movable end of the door panel is provided with a strap, and the strap is matched with the hanging ear on the front panel.

7. The combined photovoltaic combiner box according to claim 1, characterized in that: The hinged end of the front panel or top panel or back panel or bottom panel is provided with a plurality of circular sleeves distributed at intervals and cooperating with the hinge axis through the sheet metal process, and a rotation groove cooperating with the circular sleeves on the adjacent hinged plate is formed between adjacent circular sleeves. The bottom of the rotation groove is provided with a first rotating seat cooperating with the circular sleeves on the adjacent hinged plate through the sheet metal process, and a second sealing gasket cooperating with the circular sleeve is provided on the first rotating seat and the side wall of the rotation groove.

8. The combined photovoltaic combiner box according to claim 1, characterized in that: The clamping assembly includes a second clamping block arranged on the base plate or the back plate, and the second clamping block is provided with a fourth inclined surface that cooperates with a locking screw threadedly connected to the first side plate. The fourth inclined surface cooperates with the corresponding locking screw to press the back plate or the base plate against the corresponding clamping strip, and the cooperation between the fourth inclined surface and the corresponding locking screw does not interfere with the movement of the base plate or the back plate.

9. The combined photovoltaic combiner box according to claim 1, characterized in that: The adjacent box assemblies are assembled by connecting a connecting plate between two bottom plates or two top plates, and the connecting plate is connected to the bottom plates or top plates of two adjacent box assemblies through connecting bolts.

10. The combined photovoltaic combiner box according to claim 1, characterized in that: The support assembly includes a bracket, which is fixedly connected to the card strips at the lower ends of the front panel and the two first side panels of the box body assembly, and the first support rod is provided in the middle of the lower side of the bracket, and the second support rod is provided below the first support rod, and the first ear on one side of the lower end of the first support rod is hinged to the two second ears on one side of the upper end of the second support rod through a second locking bolt, and the second locking bolt is threadedly connected to the two second ears, and a pressure plate matching the first ear is provided on the second locking bolt, and two elastic pads matching each other are provided on the lower end surface of the first support rod and the upper end surface of the second support rod, and the first claw fixedly connected to the first support rod is provided on the opposite side of the first ear, and the first claw fixedly connected to the second support rod and connected to the first claw is provided on the opposite side of the two second ears. A cross-matching second claw, the first claw and the second claw are respectively in a downward tilted and upward state when the two are cross-engaged with each other, a first locking bolt is arranged in the threaded hole on the first claw, a first swivel seat is rotatably arranged on the upper end of the first locking bolt, an inclined plate is arranged on the first swivel seat, a compression spring is connected between the lower end of the first locking bolt and the first claw, a first clamping block is matched between the first claw and the second claw, a first inclined surface matching the first claw, a second inclined surface matching the second claw and a third inclined surface matching the inclined plate are arranged on the first clamping block, a plurality of wire clips for fixing the wires are arranged on the first support rod, a base is arranged at the lower end of the second support rod, and the base is fixed at the setting point in the mountainous area by fixing bolts.

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