Junction box, grid-connected device and photovoltaic power station

Abstract

The utility model discloses a junction box, grid-connected device and photovoltaic power station wherein the junction box comprises a box body, a cover plate and a wiring terminal, a wiring space is formed in the box body, two opposite sides of the wiring space are respectively provided with through holes, one of the through holes is used for communicating with a wiring hole of a photovoltaic matching device, and the other through hole is used for communicating with a wiring hole of a photovoltaic matching device. One side of the box body is provided with an operation port communicated with the wiring space; the cover plate is movably connected to the box body and is used for opening or covering the operation opening and the other through hole, and the cover plate is provided with a threading hole for an external cable to pass through; and the wiring terminal is arranged in the wiring space and is used for connecting an external cable and a cable led out from the photovoltaic matching device. According to the technical scheme of the utility model, external wiring of photovoltaic matching devices such as a grid-connected box is realized by using the junction box, and the practicability and reliability of the junction box are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic wiring devices, in particular to a wiring box, a grid-connected device and a photovoltaic power station. Background Art

[0002] In related technologies, photovoltaic power stations usually need to set up a grid-connected box between photovoltaic equipment such as inverters and the power grid. Connecting multiple photovoltaic equipment such as inverters to the grid-connected box and connecting them to the power grid can well achieve the power aggregation and output of the photovoltaic power station. By integrating circuit breakers, knife switches and other components in the grid-connected box, the grid-connected box can be used to achieve the anti-islanding function of the photovoltaic power station and the reliable system circuit on-off function, ensuring the stable operation of the photovoltaic power station.

[0003] However, as the power generation of photovoltaic power stations increases, the wiring cables of the equipment inside the grid-connected box are getting thicker and thicker. However, due to the arrangement and installation of the components inside the grid-connected box, it is becoming more and more difficult to connect the external cables of the photovoltaic equipment and the power grid to the grid-connected box and connect them to the circuit breaker, knife switch and other components, which reduces the installation efficiency of the photovoltaic power station. Most of the existing grid-connected boxes use the method of increasing the volume of the grid-connected box to increase the wiring space inside the grid-connected box to achieve convenient wiring. However, increasing the volume of the grid-connected box will cause the grid-connected box to occupy a larger space, affect the overall structural arrangement of the photovoltaic power station, and reduce the practicality and reliability of the grid-connected box. Utility Model Content

[0004] The main purpose of the utility model is to provide a junction box, which aims to use the junction box to realize external wiring of photovoltaic supporting devices such as grid-connected boxes, reduce the wiring difficulty of grid-connected devices, reduce the overall volume of the grid-connected boxes, and improve the practicality and reliability of the junction box.

[0005] To achieve the above-mentioned purpose, the junction box proposed in the utility model includes a box body, a cover plate and a wiring terminal, a wiring space is formed in the box body, and through holes are respectively provided on opposite sides of the wiring space, one of the through holes is connected to the wiring hole of the photovoltaic supporting device, and one side of the box body is provided with an operating port connected to the wiring space; the cover plate is movably connected to the box body, and opens or covers the operating port and the other through hole, and the cover plate is provided with a threading hole for an external cable to pass through; the wiring terminal is arranged in the wiring space, and is used to connect the external cable and the cable led out of the photovoltaic supporting device.

[0006] Optionally, the junction box further comprises a wiring tube, which is connected to the cover plate and covers the wire threading hole. A wiring hole connected to the wire threading hole is arranged in the wiring tube, and the wiring hole is used for passing an external cable.

[0007] Optionally, a clamping structure is provided in the wiring tube, and the clamping structure is used to clamp and fix an external cable.

[0008] Optionally, the wiring tube includes a tube body and a retracting joint, the tube body is connected to the cover plate, the tube body is provided with the wiring hole; the retracting joint is movably sleeved on the tube body, the retracting joint is provided with a retracting hole connected to the wiring hole, and the inner diameter of the retracting hole is set to gradually decrease in the direction away from the tube body. The clamping structure is a plurality of clamping strips, the plurality of clamping strips are connected to one end of the tube body facing away from the bottom cover section, and abut against the inner wall of the retracting hole, and the retracting joint can drive the plurality of clamping strips to bend toward the central axis of the wiring hole, so that the plurality of clamping strips clamp and fix the external cable.

[0009] Optionally, the cover plate includes a front cover section and a bottom cover section, the front cover section is movably connected to one side of the box body and is opened or covers the operating port; the bottom cover section is bent and connected to one side of the front cover section, the bottom cover section is provided with the threading hole, and the bottom cover section is opened or covers the through hole.

[0010] Optionally, the box body is provided with a fastening structure, and the fastening structure connects the box body and the bottom cover section.

[0011] Optionally, the bottom cover section is provided with a mounting hole, and the fastening structure includes a mounting block and a fastening bolt, the mounting block is provided on the box body and arranged relative to the mounting hole; the fastening bolt passes through the mounting hole to connect the mounting block, and a nut is provided at one end of the fastening bolt, and the nut abuts the bottom cover section.

[0012] Optionally, the box body includes two side panels relatively spaced apart and a bottom plate connecting the two side panels, the two side panels and the bottom plate form the wiring space, the side of the two side panels facing away from the bottom plate forms the operation port, and the front cover section movably connects the two side panels.

[0013] Optionally, the two side panels are respectively provided with a first sliding member, the front cover section is provided with a second sliding member, and the first sliding member and the second sliding member are arranged to move in coordination.

[0014] Optionally, a first mounting edge is provided at one end of the box body, and a second mounting edge is provided at a side of the front cover section facing away from the bottom cover section, and the first mounting edge and the second mounting edge are used to connect a photovoltaic supporting device.

[0015] The utility model also proposes a grid-connected device, which includes a grid-connected box and a junction box. The junction box is the junction box described above. The junction box is connected to the grid-connected box and is used to connect cables led out of the grid-connected box and external cables.

[0016] The utility model also provides a photovoltaic power station, which includes photovoltaic equipment and a grid-connected device. The grid-connected device is the above-mentioned grid-connected device, and the grid-connected device is electrically connected to the photovoltaic equipment.

[0017] The technical solution of the utility model is to set a wiring space in the box body, and set through holes on the opposite sides of the wiring space respectively, and set an operation port connected to the wiring space on one side of the box body, and the cover plate can be used to move the connection box body to make the cover plate open or cover the operation port and the through hole, and then the junction box is used in conjunction with photovoltaic supporting devices such as grid-connected boxes and combiner boxes to make a through hole on the box body correspond to the wiring hole connected to the photovoltaic supporting device, and the input cable or output cable of the photovoltaic supporting device can be passed through the threading hole on the cover plate into the wiring space of the box body, so that the input cable or output cable passes through the wiring hole to be exposed in the wiring space and is inserted into one end of the wiring terminal, and then the external cable is passed through the threading hole into the wiring space and is inserted into the other end of the wiring terminal, and the photovoltaic supporting device and the external cable are connected under the conductive action of the wiring terminal, and there is no need to perform wiring operations in the boxes of photovoltaic supporting devices such as grid-connected boxes and combiner boxes with narrow space, thereby reducing the difficulty of wiring operations in photovoltaic power stations and improving the wiring convenience and assembly efficiency of photovoltaic power stations. By opening the cover or covering the two surfaces of the box body, the junction box can have a larger operating space when the cover is moved to open the wiring space to perform wiring or maintenance operations, and when the cover is closed on the box body, the overall closed protection of the junction box can be guaranteed, allowing construction workers to work at the junction box more conveniently, further improving the convenience and reliability of junction box operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a front view of an embodiment of the utility model grid-connected device;

[0020] Figure 2 This is a schematic structural diagram of an embodiment of a junction box of the utility model;

[0021] Figure 3 for Figure 2 A structural exploded view of an embodiment of a junction box;

[0022] Figure 4 for Figure 2 A front view of a box body of a junction box according to an embodiment of the present invention;

[0023] Figure 5 for Figure 2 A top view of a box body of an embodiment of a junction box;

[0024] Figure 6 for Figure 2 A cross-sectional view of an embodiment of a wiring tube of a junction box.

[0025] Description of Figure Numbers:

[0026] Label name Label name 100 Junction Box 51 Front cover section 10 Box 511 Second sliding member 11 Side panels 513 Second mounting edge 111 Wiring space 53 Bottom cover section 1111 Through hole 531 Threading hole 113 Operation port 70 Wiring tube 115 First slide 71 Tube body 13 Base Plate 711 Wiring hole 131 Mounting Block 73 Folding joint 15 First installation edge 731 Tuck hole 30 Terminal Blocks 75 Clamping strip 50 Cover 200 Grid-connected box

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] As the power generation of photovoltaic power stations increases, the wiring cables of the equipment inside the grid-connected box are getting thicker and thicker. However, due to the arrangement and installation of the components inside the grid-connected box, it is becoming more and more difficult to connect the external cables of the photovoltaic equipment and the power grid to the grid-connected box and connect them to the circuit breakers, switches and other components, which reduces the installation efficiency of the photovoltaic power station. Most of the existing grid-connected boxes use the method of increasing the volume of the grid-connected box to increase the wiring space inside the grid-connected box to achieve convenient wiring. However, increasing the volume of the grid-connected box will cause the grid-connected box to occupy a larger space, affect the overall structural arrangement of the photovoltaic power station, and reduce the practicality and reliability of the grid-connected box. In view of the above problems, the utility model proposes a junction box 100.

[0033] Reference Figures 1 to 6 In an embodiment of the utility model, the junction box 100 includes a box body 10, a cover plate 50 and a wiring terminal 30. A wiring space 111 is formed in the box body 10. Through holes 1111 are respectively provided on opposite sides of the wiring space 111, one of the through holes 1111 is used to connect the wiring holes of the photovoltaic supporting equipment, and an operation port 113 connected to the wiring space 111 is provided on one side of the box body 10; the cover plate 50 is movably connected to the box body 10, and opens or covers the operation port 113 and another through hole 1111, and the cover plate 50 is provided with a threading hole 531 for the external cable to pass through; the wiring terminal 30 is arranged in the wiring space 111, and is used to connect the external cable and the cable led out of the photovoltaic supporting device.

[0034] It is understandable that the photovoltaic power station can be provided with photovoltaic supporting devices such as inverters, junction boxes, and grid-connected boxes 200 that are electrically connected to the photovoltaic components, so that the electrical energy converted by the photovoltaic components absorbing light energy can be processed by the photovoltaic supporting devices and then output for steady-state energy supply or the stable current can be incorporated into the power grid system to ensure the stable operation of the photovoltaic power station. Among them, it is usually necessary to integrate multiple components in the photovoltaic supporting devices to ensure the stable operation of the photovoltaic supporting devices. Taking the grid-connected box 200 as an example, the grid-connected box 200 can be integrated with components such as circuit breakers, knife switches, electric energy meters, and lightning protection grounding devices, so that the grid-connected box 200 can disconnect the connection between the photovoltaic equipment and the power grid in time during the photovoltaic power station or the power grid failure or overload operation, ensuring the stable and reliable grid connection of the photovoltaic power station. Therefore, the existing photovoltaic power station usually needs to avoid the interference between the routing of external cables and components when wiring in the photovoltaic supporting devices, resulting in a more complicated wiring process for the photovoltaic power station.

[0035] In the present application, the photovoltaic supporting device can be provided with a wiring hole at the bottom of the box body, so that the input cables or output cables of each component in the photovoltaic supporting device can be inserted into the wiring hole. At this time, by providing a junction box 100 at the side wall of the photovoltaic supporting device with the wiring hole, the junction box 100 can connect the box body 10 to the outer wall of the box body of the photovoltaic supporting device, so that a through hole 1111 on the box body 10 cooperates with the wiring hole on the photovoltaic supporting device; or when the photovoltaic supporting device is installed on the outer wall of the supporting frame or the building wall, the junction box 100 is connected to the supporting frame or the building wall accordingly, and is arranged in a stacked manner with the photovoltaic supporting device, so that a through hole 1111 on the box body 10 can be arranged opposite to the wiring hole on the photovoltaic supporting device, so that the wiring hole can be connected to the wiring space 111 formed in the box body 10 through the through hole 1111. Then, the input cables or output cables of each component in the photovoltaic supporting device can pass through the wiring hole and the through hole 1111 to enter the wiring space 111. At this time, by setting a threading hole 531 on the cover plate 50 for the external cable of other equipment or the power grid to pass through, the external cable can pass through the threading hole 531 into the wiring space 111, and by installing a wiring terminal 30 in the wiring space 111, the wiring terminal 30 can be provided with a plug structure at both ends for the cable end to be plugged in, and the cable can be fixed after the cable is inserted into the plug structure, and at the same time, the cables plugged in at both ends of the wiring terminal 30 are connected. The wiring terminal 30 can be used to connect the external cable and the input cable or output cable of the photovoltaic supporting device, so as to realize the power transmission between the photovoltaic components, the photovoltaic supporting device and the power grid, and ensure the stable operation of the photovoltaic power station. For example, when connecting the inverter of the photovoltaic module, the grid-connected box 200 and the power grid, two such junction boxes 100 can be provided on the grid-connected box 200. The first junction box 100 can be connected to the wiring hole of the grid-connected box 200 for passing the input cable, and the second junction box 100 can be connected to the wiring hole of the grid-connected box 200 for passing the output cable. The current output wire of the inverter can be passed through the wiring hole of the first junction box 100 to connect the input cable of the grid-connected box 200, and then the current input cable of the power grid can be passed through the wiring hole of the second junction box 100 to connect the output cable of the grid-connected box 200, so that the wiring work of the grid-connected device can be completed in the junction box 100. With the help of the junction box 100, the wiring of external cables with the input cables or output cables of various components in the photovoltaic supporting device can be transferred to the junction box 100 for operation. There is no need to perform the wiring operation of the external cables with the input cables or output cables inside the photovoltaic supporting device with a compact arrangement and complicated wiring. This effectively reduces the difficulty of wiring operations and maintenance of the photovoltaic power station, which is conducive to better improving the assembly efficiency of the photovoltaic power station.At the same time, there is no need to reserve wiring space for external cables in photovoltaic supporting devices such as the grid-connected box 200 and the junction box, which is conducive to better reducing the overall volume of the photovoltaic supporting device and further improving the practicality of the junction box. In addition, by setting the wiring terminal 30 in the wiring space 111 for wiring, the wiring operation of the input cable or output cable of the photovoltaic supporting device and the external cable can be realized through a more convenient plug-in method, ensuring stable power transmission between photovoltaic components, photovoltaic supporting devices and the power grid, and further improving the wiring convenience and reliability of the photovoltaic power station.

[0036] By moving and connecting the cover plate 50 on the box body 10, the cover plate 50 and the box body 10 can be arranged in a detachable matching structure, so that the cover plate 50 can be detached from the box body 10 to perform wiring or maintenance operations on photovoltaic supporting devices such as the grid-connected box 200 and the junction box, and the cover plate 50 can be used to cover the box body 10 after the operation is completed to ensure the closure of the wiring node; or, a hinge or other hinge structure can be set between the cover plate 50 and the box body 10, so that the cover plate 50 can be moved relative to the box body 10 to open the wiring space 111 when performing wiring or maintenance operations on the grid-connected box 200, and the cover plate 50 can be moved again to connect the box body 10 after the operation is completed to close the wiring space 111 to ensure the closure of the wiring node, thereby ensuring the reliable and stable operation of the wiring box 100. Among them, through holes 1111 are formed in the box body 10 and pass through the opposite sides of the box body 10, and an operating port 113 connected to the wiring space 111 is provided on one side of the box body 10, so that the box body 10 can have a larger open area. Taking the installation of the junction box on the grid box 200 as an example, one of the through holes 1111 of the junction box 100 can be covered by the grid box 200 when the box body 10 is connected to the grid box 200, so that the wiring hole on the grid box 200 can be connected to this end of the wiring space 111. At this time, by opening or covering the operating port 113 on one side of the box body 10 and the other through hole 1111 facing away from the grid-connected box 200 when the cover plate 50 moves on the box body 10, the contact surface between the cover plate 50 and the box body 10 can be arranged in an "L" shape, so that the cover plate 50 can open or cover two adjacent surfaces on the box body 10, thereby allowing construction workers to have a larger operating space when performing wiring operations or maintenance operations. At the same time, when the cover plate 50 covers the box body 10, it can completely close the open surface of the box body 10, thereby realizing the closed protection of the wiring node by the junction box 100, which is conducive to better reducing the difficulty of wiring operations of the grid-connected device and further improving the operational convenience and reliability of the junction box 100.

[0037] Reference Figures 1 to 3 In one embodiment of the utility model, the junction box 100 further includes a wiring tube 70, which is connected to the cover plate 50 and covers the threading hole 531. The wiring tube 70 is provided with a wiring hole 711 connected to the threading hole 531, and the wiring hole 711 is used for passing an external cable.

[0038] In this embodiment, the junction box 100 can be installed with a connecting wiring tube 70 on the cover plate 50, and a wiring hole 711 with a certain length can be set in the wiring tube 70. The wiring hole 711 is connected to the threading hole 531 on the cover plate 50, so that an external cable can be connected to the wiring tube 70 through the wiring hole 711 and then pass through the threading hole 531 to enter the box body 10 and connect with the lead-out cable of the grid-connected box 200. This is beneficial to a certain bundling effect of multiple external cables connected to the box body 10 under the aperture limitation of the wiring hole 711, and better avoid the external cables from being scattered and messy outside the junction box 100, so that construction workers can more conveniently identify the cables to be maintained, improve the wiring aesthetics of the junction box 100, and further improve the practicality and reliability of the junction box 100.

[0039] Reference Figure 6 In one embodiment of the present invention, a clamping structure is provided in the wiring tube 70, and the clamping structure is used to clamp and fix the external cable.

[0040] In this embodiment, the wiring tube 70 can be provided with a clamping spring in the pipe mouth or the wiring hole 711 of the wiring tube 70, or a clamping joint that can rotate and shrink the aperture of one end of the wiring hole 711 can be provided at the end of the wiring tube 70, so that the wiring tube 70 can use a clamping structure such as a clamping spring or a clamping joint to limit and fix the external cable passing through the wiring hole 711. At this time, after a plurality of external cables with an outer diameter smaller than the aperture of the wiring hole 711 after being bundled pass through the wiring hole 711 and enter the box body 10 to be connected with the lead-out cable of the grid-connected box 200, the clamping structure can use the spring to tighten the lead-out cable. The elastic support effect or the use of the joint to shrink the gap between the wiring hole 711 and the outer periphery of the external cable bundle can enable the part of the external cable passing through the wiring tube 70 to be clamped and fixed by the clamping structure, which is beneficial to better prevent the end of the external cable connected to the input cable or output cable of the photovoltaic supporting device in the box body 10 from falling off when the external cable is subjected to shaking or jittering force, so that the junction box 100 can more stably and reliably connect the cables and external cables led out of photovoltaic supporting devices such as the grid-connected box 200, further improving the structural stability and reliability of the junction box 100.

[0041] Reference Figure 6In one embodiment of the utility model, the wiring tube 70 includes a tube body 71 and a retracting joint 73. The tube body 71 is connected to the cover plate 50. The tube body 71 is provided with a wiring hole 711. The retracting joint 73 is movably sleeved on the tube body 71. The retracting joint 73 is provided with a retracting hole 731 connected to the wiring hole 711. The inner diameter of the retracting hole 731 is set to gradually decrease in the direction away from the tube body 71. The clamping structure is a plurality of clamping strips 75. The plurality of clamping strips 75 are connected to one end of the tube body 71 facing away from the bottom cover section 53 and abut against the inner wall of the retracting hole 731. The retracting joint 73 can drive the plurality of clamping strips 75 to bend toward the central axis of the wiring hole 711, so that the plurality of clamping strips 75 clamp and fix the external cable.

[0042] In this embodiment, the clamping structure can be a plurality of clamping strips 75 with a certain elasticity. The plurality of clamping strips 75 can be arranged around the end surface of the tube body 71 facing away from the cover plate 50, and then when the retracting joint 73 is sleeved on the end of the tube body 71 facing away from the cover plate 50, the clamping strips 75 can be inserted into the retracting hole 731 in the retracting joint 73. At this time, by gradually reducing the aperture of the retracting hole 731 in the direction away from the tube body 71, the retracting hole 731 can be set in the shape of a conical hole, and then the external cable passes through the retracting hole 731, the wiring hole 711 and the threading hole 531 in sequence to enter the box body 10 and connect with the optical fiber. After the lead-out cable of the volt-matching device is connected, the retraction joint 73 can be moved on the tube body 71 in the direction toward the cover plate 50, so that the inner wall of the retraction hole 731 abuts the clamping strip 75, and the clamping strip 75 has a certain elasticity so that the clamping strip 75 is subjected to the force of the retraction joint 73 and is bent toward the central axis of the wiring hole 711 and abuts against the outer periphery of the external cable, so that the clamping strip 75 can fill the gap between the pipe mouth of the tube body 71 and the external cable under the action of the retraction joint 73, thereby realizing the clamping and fixing effect of the clamping structure on the external cable, and further ensuring the wiring stability and reliability of the junction box 100.

[0043] Among them, the inner wall of the retracted joint 73 and the outer periphery of the tube body 71 can be provided with mutually matching threads to realize threaded connection, so that the clamping range of the clamping strip 75 can be adjusted by changing the length of the retracted joint 73 screwed into the tube body 71, so that the wiring tube 70 can be passed through and fixed with external cable bundles of various sizes. At the same time, the method of threaded connection of the retracted joint 73 and the tube body 71 can more conveniently adjust the clamping structure, further improving the operational convenience and practicality of the junction box 100.

[0044] Reference Figure 2 and Figure 3In one embodiment of the utility model, the cover plate 50 includes a front cover section 51 and a bottom cover section 53. The front cover section 51 is movably connected to one side of the box body 10, and an opening or cover operation port 113 is set; the bottom cover section 53 is bent and connected to one side of the front cover section 51, and the bottom cover section 53 is provided with a threading hole 531. The bottom cover section 53 is opened or a cover through hole 1111 is set.

[0045] In this embodiment, by bending the bottom cover section 53 and connecting it to one side of the front cover section 51 to form the cover plate 50, the cover plate 50 can better form a plate structure similar to an "L" shape, so that when the cover plate 50 moves on the box body 10, the front cover section 51 and the bottom cover section 53 can be better used to simultaneously open or simultaneously cover the operating port 113 and the through hole 1111 away from the grid-connected box 200, thereby realizing convenient disassembly and assembly of the box body 10 and the cover plate 50. Among them, a slider rail or a hinged structure can be set between the front cover section 51 and the box body 10, and the disassembly and assembly of the cover plate 50 and the box body 10 can be realized by using the movable connection between the front cover section 51 and the box body 10. Since the bottom cover section 53 and the photovoltaic supporting device respectively cover the through holes 1111 on the opposite sides of the wiring space 111, by opening the threading hole 531 on the bottom cover section 53, the external cable can be more directly connected to the lead-out cable of the photovoltaic supporting device after passing through the threading hole 531, which is beneficial to better reduce the bending and routing of the external cable in the box body 10, and further improve the wiring convenience and practicality of the junction box 100.

[0046] In one embodiment of the present invention, the box body 10 is provided with a fastening structure, and the fastening structure connects the box body 10 and the bottom cover section 53 .

[0047] In this embodiment, the junction box 100 can use a fastening structure such as a lock or bolt to connect and fix the box body 10 and the bottom cover section 53 between the box body 10 and the bottom cover section 53, so as to achieve a fixed connection between the box body 10 and the cover plate 50 after installation, so that after the junction box 100 completes the wiring, the overall sealing protection of the junction box 100 can be more stably guaranteed, and the influence of external factors on the wiring nodes in the box body 10 is reduced, and the structural stability and reliability of the junction box 100 are further improved. In addition, by connecting the box body 10 and the cover plate 50 with a fastening structure, the box body 10 and the cover plate 50 can be more conveniently disassembled to perform wiring and maintenance operations, further improving the operational convenience and practicality of the junction box 100.

[0048] Reference Figure 4 and Figure 5 In one embodiment of the utility model, the bottom cover section 53 is provided with a mounting hole, and the fastening structure includes a mounting block 131 and a fastening bolt. The mounting block 131 is arranged on the box body 10 and is arranged relative to the mounting hole; the fastening bolt is passed through the mounting hole to connect the mounting block 131, and a nut is provided at one end of the fastening bolt, which abuts against the bottom cover section 53.

[0049] In this embodiment, the fastening structure can connect and set the mounting block 131 on the outer wall of the box body 10 or the inner wall of the wiring space 111 adjacent to the through hole 1111, and the bottom cover section 53 covers the mounting block 131, so that the mounting block 131 and the mounting hole of the bottom cover section 53 are arranged opposite to each other, and then the fastening bolt of the fastening structure can be connected to the mounting block 131 through the mounting hole. At this time, a threaded hole can be provided on the mounting block 131 to be threadedly connected with the fastening bolt; or a through hole can be provided on the mounting block 131 for the fastening bolt to pass through, and a nut can be used to connect and fix the mounting block 131 with the fastening bolt on the side of the mounting block 131 facing away from the bottom cover section 53. The fastening structure can fasten the box body 10 and the bottom cover section 53 under the abutment of the nut of the fastening bolt and the bottom cover section 53 and the connection and fixing of the fastening bolt and the mounting block 131, thereby ensuring the overall sealing effect of the wiring box 100. By using the connection method of fastening bolts, the connection operation between the fastening structure and the box body 10 and the cover plate 50 can be more convenient, so that the disassembly and assembly of the junction box 100 can be more convenient, and the operation convenience and practicality of the junction box 100 can be further improved.

[0050] Reference Figures 3 to 5 In one embodiment of the utility model, the box body 10 includes two side panels 11 relatively spaced apart and a bottom panel 13 connecting the two side panels 11, the two side panels 11 and the bottom panel 13 form a wiring space 111, the two side panels 11 facing away from the bottom panel 13 form an operation port 113, and the front cover section 51 is movably connected to the two side panels 11.

[0051] In this embodiment, by connecting two opposite side panels 11 with the bottom plate 13 to form the box body 10, the box body 10 can be formed into a structure similar to a "U" shape, so that the box body 10 can form a larger wiring space 111, which is convenient for construction workers to operate and repair wiring in the box body 10. At this time, the cover plate 50 can connect the front cover section 51 with the two side panels 11 to realize the disassembly and assembly of the box body 10 and the cover plate 50, and the front cover section 51 can be connected to the box body 10 by respectively setting a slider rail or a hinge structure between the front cover section 51 and the two side panels 11 to realize the movable connection between the front cover section 51 and the box body 10, so that the construction workers can more conveniently slide the cover plate 50 up and down on the box body 10 or rotate the cover plate 50 left and right to realize the disassembly and assembly of the cover plate 50 and the box body 10, further improving the convenience of operation of the junction box 100. In addition, the junction box 100 can also connect the side of the front cover section 51 facing away from the bottom cover section 53 to the photovoltaic supporting device, and connect the bottom plate 13 and the two side plates 11 facing away from the bottom cover section 53 to the photovoltaic supporting device, so that the junction box 100 can be more stably connected and installed on the photovoltaic supporting device. The wiring holes surrounding the photovoltaic supporting device are set to ensure the sealing of the wiring space 111 in the box body 10 after the junction box 100 is installed in the photovoltaic supporting device, so that the junction box 100 can better seal and protect the wiring nodes, further improving the structural stability and reliability of the junction box 100.

[0052] Reference Figure 3 In one embodiment of the present invention, the two side panels 11 are respectively provided with a first sliding member 115, and the front cover section 51 is provided with a second sliding member 511, and the first sliding member 115 and the second sliding member 511 are arranged to move in coordination.

[0053] In this embodiment, the first sliding member 115 can be a slider or a slide rail, and the second sliding member 511 can be a slider or the other of the sliders, so that the first sliding member 115 and the second sliding member 511 can be slidably arranged in cooperation with each other, and then by respectively arranging the first sliding member 115 on the two side panels 11 and arranging the second sliding member 511 on the front cover section 51, the first sliding member 115 and the second sliding member 511 can be used to cooperate with each other to achieve the sliding connection of the cover plate 50 on the box body 10, so that the construction workers can open or close the cover plate 50 to the operating port 113 of the box body 10 and the through hole 1111 away from the grid-connected box 200 by sliding the cover plate 50 up and down, thereby further improving the operational convenience of the junction box 100 and improving the wiring efficiency and inspection and maintenance efficiency of the grid-connected device.

[0054] Among them, the junction box 100 can be provided with a fastening structure between the bottom cover section 53 and the bottom plate 13 or the side plate 11 to achieve the connection and fixation of the cover plate 50 after covering the box body 10; or a fastening structure can be provided between the front cover section 51 and the side plate 11 to achieve the connection and fixation of the cover plate 50 after covering the box body 10, so that the junction box 100 can better maintain the sealing and protection function in daily operation.

[0055] Reference Figure 3 and Figure 5 In one embodiment of the utility model, a first mounting edge 15 is provided at one end of the box body 10, and a second mounting edge 513 is provided on the side of the front cover section 51 facing away from the bottom cover section 53. The first mounting edge 15 and the second mounting edge 513 are used to connect the photovoltaic supporting device.

[0056] In this embodiment, the junction box 100 can be provided with a first mounting edge 15 by bending the end of the box body 10 toward the photovoltaic supporting device, and a second mounting edge 513 by bending the side of the front cover section 51 facing away from the bottom cover section 53, and the first mounting edge 15 and the second mounting edge 513 can be connected and fixed to the outer wall of the photovoltaic supporting device to realize the assembly of the junction box 100 on the photovoltaic supporting device. At this time, through holes can be opened in the first mounting edge 15 and the second mounting edge 513, and bolts can be passed through the through holes and threadedly connected to the box body of the photovoltaic supporting device to fix the junction box 100 and the photovoltaic supporting device; or the outer wall of the box body of the photovoltaic supporting device and the first mounting edge 15 and the second mounting edge 513 can be welded and fixed to realize the fixed connection between the junction box 100 and the photovoltaic supporting device, and then under the action of the first mounting edge 15 and the second mounting edge 513, the connection area between the junction box 100 and the photovoltaic supporting device can be better increased, and the connection stability and reliability of the junction box 100 and the grid-connected box 200 can be further improved, and the overall structural stability of the grid-connected device can be ensured.

[0057] The utility model also proposes a grid-connected device, which includes a grid-connected box 200 and a junction box 100. The specific structure of the junction box 100 refers to the above embodiment. Since the grid-connected device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0058] The utility model also proposes a photovoltaic power station, which includes photovoltaic equipment and a grid-connected device. The specific structure of the grid-connected device refers to the above-mentioned embodiment. Since the photovoltaic power station adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0059] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A junction box, characterized in that: include: A box body, wherein a wiring space is formed in the box body, through holes are respectively provided on opposite sides of the wiring space, one of the through holes is used to connect to the wiring hole of the photovoltaic supporting device, and an operation port connected to the wiring space is provided on one side of the box body; A cover plate, the cover plate is movably connected to the box body and opens or covers the operation port and another through hole, and the cover plate is provided with a threading hole for an external cable to pass through; The wiring terminal is arranged in the wiring space and is used to connect external cables and cables led out of the photovoltaic supporting device.

2. The junction box according to claim 1, characterized in that: The junction box also includes a wiring tube, which is connected to the cover plate and covers the threading hole. A wiring hole connected to the threading hole is provided in the wiring tube, and the wiring hole is used for passing an external cable.

3. The junction box according to claim 2, characterized in that: A clamping structure is provided in the wiring tube, and the clamping structure is used to clamp and fix the external cable.

4. The junction box according to claim 3, characterized in that: The wiring tube comprises: A pipe body, the pipe body is connected to the cover plate, and the wiring hole is arranged in the pipe body; A retractable joint, the retractable joint is movably sleeved on the pipe body, the retractable joint is provided with a retractable hole connected to the wiring hole, and the inner diameter of the retractable hole is set to gradually decrease in a direction away from the pipe body; The clamping structure is a plurality of clamping strips, which are connected to one end of the tube body facing away from the cover plate and abut against the inner wall of the gathering hole. The gathering joint can drive the plurality of clamping strips to bend toward the central axis of the wiring hole so that the plurality of clamping strips clamp and fix the external cables.

5. The junction box according to any one of claims 1 to 4, characterized in that: The cover plate comprises: A front cover section, which is movably connected to one side of the box body and opens or covers the operation port; A bottom cover section, wherein the bottom cover section is bent and connected to one side of the front cover section, the bottom cover section is provided with the threading hole, and the bottom cover section is opened or covers the through hole.

6. The junction box according to claim 5, characterized in that: The box body is provided with a fastening structure, and the fastening structure connects the box body and the bottom cover section.

7. The junction box according to claim 6, characterized in that: The bottom cover section is provided with a mounting hole, and the fastening structure comprises: A mounting block, the mounting block being arranged on the box body and arranged opposite to the mounting hole; A fastening bolt is passed through the mounting hole to connect the mounting block, and a nut is provided at one end of the fastening bolt, and the nut abuts against the bottom cover section.

8. The junction box according to claim 5, characterized in that: The box body includes two side panels that are relatively spaced apart and a bottom panel connecting the two side panels. The two side panels and the bottom panel form the wiring space. The side of the two side panels facing away from the bottom panel forms the operation port. The front cover section is movably connected to the two side panels.

9. The junction box according to claim 8, characterized in that: The two side panels are respectively provided with a first sliding member, the front cover section is provided with a second sliding member, and the first sliding member and the second sliding member are arranged to move in coordination.

10. The junction box according to claim 5, characterized in that: A first mounting edge is provided at one end of the box body, and a second mounting edge is provided at a side of the front cover section facing away from the bottom cover section. The first mounting edge and the second mounting edge are used to connect a photovoltaic supporting device.

11. A grid-connected device, characterized in that: The grid-connected device comprises a grid-connected box and a junction box, wherein the junction box is the junction box as described in any one of claims 1 to 10, and the junction box is connected to the grid-connected box and is used to connect cables led out of the grid-connected box and external cables.

12. A photovoltaic power station, characterized in that: The photovoltaic power station comprises photovoltaic equipment and a grid-connected device, wherein the grid-connected device is the grid-connected device according to claim 11, and the grid-connected device is electrically connected to the photovoltaic equipment.

Images