Low-voltage photovoltaic grid-connected box with electric leakage alarm function

Abstract

The utility model discloses a low-voltage photovoltaic grid-connected box with an electric leakage alarm function, which belongs to the technical field of grid-connected boxes and comprises a grid-connected box body, a pair of symmetrically distributed track assemblies are arranged in the grid-connected box body, sliding assemblies are arranged at the top ends of the track assemblies, and mounting frames are arranged at the top ends of the sliding assemblies. The installation frame is located in the grid connection box body, the heat dissipation assembly is arranged at the top end of the grid connection box body, the installation frame is arranged in the grid connection box body, the space in the grid connection box body can be divided into two spaces through the installation frame, different devices can be installed separately, and the sliding assembly and the track assembly are arranged below the installation frame. The installation frame is installed on the sliding assembly, and the sliding assembly can slide on the rail assembly, so that the two separated spaces can be adjusted respectively by moving the installation frame, the space layout in the box is adjusted according to needs, different devices can be installed conveniently, and the utilization rate and flexibility of the internal space are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grid-connected boxes, and more specifically, to a low-voltage photovoltaic grid-connected box with a leakage alarm function. Background Art

[0002] A photovoltaic grid-connected box is a device that converts direct current generated by a photovoltaic power generation system into alternating current and connects it to the public power grid. In a photovoltaic power generation system, solar panels convert solar energy into direct current. This direct current first passes through an inverter to be converted into alternating current, and then the generated electric energy is sent into the public power grid through the grid-connected box, which is used to ensure the safe operation of the photovoltaic power generation system and its effective connection with the public power grid, thereby generating benefits and realizing the effective utilization of clean energy.

[0003] The patent with the Chinese patent publication number CN220122406U discloses a distributed photovoltaic grid-connected box, which is designed with multiple levels and adopts a flipping bracket and a sliding slider design. The installation process of the battery pack and the inverter assembly is simple. Just place the components in the corresponding storage areas and fix them, which improves the installation and maintenance efficiency of the device. At the same time, the circulation system achieves a good heat dissipation effect for the photovoltaic grid-connected box, improving the stability and safety of the system operation. When maintenance is required, just open the outer door and flip the flipping bracket outwards along the inner hinge, and then the electrical components can be easily inspected and maintained.

[0004] Generally, a relatively large number of electrical devices need to be installed inside the photovoltaic grid-connected box, such as an electric meter for calculating electricity consumption, electrical switch devices, circuit breakers, earthing switches, etc. for improving safety, or a controller for monitoring, operating, and controlling photovoltaic power generation. For the convenience of installation and management, they are usually installed in categories. The internal space of the grid-connected box in the above solution is fixed and cannot be adjusted, and it cannot be adjusted according to the specific installation requirements, which will lead to inefficient utilization of the internal space and cause waste of space.

[0005] Therefore, it is necessary to provide a low-voltage photovoltaic grid-connected box with a leakage alarm function to solve the above problems. Summary of the Utility Model

[0006] The utility model provides a low-voltage photovoltaic grid-connected box with a leakage alarm function, which can improve the problem in the related technology that the internal space of the grid-connected box is fixed and cannot be adjusted, and it cannot be adjusted according to the specific installation requirements, which will lead to inefficient utilization of the internal space and cause waste of space.

[0007] An embodiment of the present application provides a low-voltage photovoltaic grid-connected box with a leakage alarm function, which includes a grid-connected box body. Inside the grid-connected box body, a pair of symmetrically distributed track components are arranged. At the top of each of the pair of track components, a sliding component is provided. At the top of the sliding component, a mounting rack is provided. The mounting rack is located inside the grid-connected box body. At the top of the grid-connected box body, a heat dissipation component is provided. The track component includes a slide rail. On both sides of the slide rail, abutting blocks are fixedly connected. The sliding component includes a movable block. The movable block is adapted to the slide rail and is slidably connected to the slide rail. The bottom end of the mounting rack is fixedly connected to the top end of the movable block.

[0008] In the above technical solution of the embodiment of the present application, at least the following technical effects are achieved: A mounting rack is arranged inside the grid-connected box body. Through the mounting rack, the space inside the grid-connected box body can be divided into two spaces, so that different devices can be installed separately. Below the mounting rack, a sliding component and a track component are provided. The mounting rack is installed on the sliding component, and the sliding component can slide on the track component. Thus, by moving the mounting rack, the two separated spaces can be adjusted respectively, and the internal space layout of the box can be adjusted according to needs, which is convenient for installing different devices and improves the utilization rate and flexibility of the internal space.

[0009] In some embodiments, a main box door is rotatably connected to the outer end of the grid-connected box body, and an upper box door and a lower box door are respectively rotatably connected to the side of the grid-connected box body away from the main box door. An alarm is installed on the outer end of the main box door, and a handle is fixedly connected to the bottom end of the mounting rack.

[0010] In some embodiments, the heat dissipation component includes a top frame. The top frame is fixedly installed at the top of the grid-connected box body. The top frame is communicated with the inside of the grid-connected box body, and a plurality of air outlets are arranged at the outer end of the top frame.

[0011] In some embodiments, a fixing frame is fixedly connected to the inner side of the top frame. A plurality of heat dissipation fans are installed at the outer end of the fixing frame. A top cover plate is detachably connected to the top end of the top frame. Air inlets are arranged on both sides of the grid-connected box body.

[0012] In some embodiments, the track component further includes two connecting blocks. Both of the two connecting blocks are fixedly installed at the outer end of the slide rail. The slide rail is fixedly installed on the inner side wall of the grid-connected box body through the connecting blocks. A plurality of equally spaced limiting holes are opened inside the slide rail.

[0013] In some embodiments, the sliding component further includes two side connecting frames. The two side connecting frames are respectively fixed on both sides of the movable block. A pulley is rotatably connected to the inner side of the side connecting frame. An annular groove adapted to the abutting block is opened on the outer periphery of the pulley.

[0014] In some embodiments, a plurality of sliding grooves are formed inside the movable block, telescopic springs are arranged inside the plurality of sliding grooves, both ends of each telescopic spring are fixedly connected with a limiting block, the limiting block is slidably connected with the inner wall of the sliding groove, and the limiting block abuts against the limiting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic diagram of the first overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the second overall structure of the present utility model;

[0018] Figure 3 is a schematic diagram of the internal structure of the present utility model;

[0019] Figure 4 is a schematic diagram of the heat dissipation component structure of the present utility model;

[0020] Figure 5 is a schematic diagram of the mounting bracket structure of the present utility model;

[0021] Figure 6 is a schematic diagram of the track component structure of the present utility model;

[0022] Figure 7 is a schematic diagram of the sliding component structure of the present utility model.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1, grid-connected box body;

[0025] 2, main box door;

[0026] 3, top cover plate;

[0027] 4, alarm;

[0028] 5, air inlet;

[0029] 6, heat dissipation component; 61, top frame; 62, air outlet; 63, fixing frame; 64, heat dissipation fan;

[0030] 7, mounting bracket;

[0031] 8, track component; 81, slide rail; 82, limiting hole; 83, connecting block; 84, abutting block;

[0032] 9. Sliding assembly; 91. Movable block; 92. Side connecting frame; 93. Pulley; 94. Annular groove; 95. Limit block; 96. Telescopic spring; 97. Chute;

[0033] 10. Upper box door;

[0034] 11. Lower box door;

[0035] 12. Handle. Detailed implementation manner

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0038] Based on this, it can improve the problem in the related technology that the internal space of the grid-connected box is fixed and cannot be adjusted, and it cannot be adjusted according to the specific installation requirements, which will lead to inefficient use of the internal space and cause waste of space.

[0039] Please refer to Figures 1 - 7 , a low-voltage photovoltaic grid-connected box with a leakage alarm function, including a grid-connected box body 1. A pair of symmetrically distributed track assemblies 8 are arranged inside the grid-connected box body 1. Sliding assemblies 9 are arranged at the tops of the pair of track assemblies 8. An installation frame 7 is arranged at the top of the sliding assembly 9. The installation frame 7 is located inside the grid-connected box body 1. A heat dissipation assembly 6 is arranged at the top of the grid-connected box body 1. The track assembly 8 includes a slide rail 81. Abuttment blocks 84 are fixedly connected to both sides of the slide rail 81. The sliding assembly 9 includes a movable block 91. The movable block 91 is adapted to the slide rail 81 and is slidably connected to the slide rail 81. The bottom end of the installation frame 7 is fixedly connected to the top end of the movable block 91.

[0040] The outer end of the grid-connected box body 1 is rotatably connected with a main box door 2. The upper box door 10 and the lower box door 11 are respectively rotatably connected to the side of the grid-connected box body 1 away from the main box door 2. An alarm 4 is installed on the outer end of the main box door 2. The bottom end of the installation frame 7 is fixedly connected with a handle 12.

[0041] Solar panels convert solar energy into direct current (DC). This DC is first converted into alternating current (AC) by an inverter. The device in this solution is mainly used to feed the generated electrical energy into the public power grid to ensure the safe operation of the photovoltaic power generation system and its effective connection to the public power grid. Inside the grid-connected box body 1, there is an installation rack 7. The installation rack 7 can divide the interior of the grid-connected box body 1 into two spaces. At the same time, the installation rack 7 is also used to install electrical equipment. That is, the control system and the switch system can be installed on both sides of the installation rack 7 respectively. The control system is used to monitor, operate, and control the operation of the photovoltaic power generation system to ensure the efficient and stable operation of the system. It usually includes a data acquisition system and communication equipment. The data acquisition system is used to monitor the operation status of the system in real time and collect data, and the communication equipment is used to communicate with other systems or the central monitoring room. The switch system is used to control the on-off operation of the power system to ensure the safe and stable operation of the system and provide overload and short-circuit protection. It usually includes a circuit breaker, an earthing switch, and switch control equipment, etc.

[0042] The installation rack 7 divides the interior space of the grid-connected box body 1 into two spaces, enabling different equipment to be installed separately. Below the installation rack 7, there is a sliding component 9 and a track component 8. The installation rack 7 is installed on the sliding component 9, and the sliding component 9 can slide on the track component 8. Thus, by moving the installation rack 7, the two separated spaces can be adjusted respectively, and the internal space layout of the box can be adjusted according to needs, improving the utilization rate and flexibility of the internal space.

[0043] On both sides of the grid-connected box body 1, there are also a main box door 2, an upper box door 10, and a lower box door 11 rotatably connected respectively. Among them, the upper box door 10 and the lower box door 11 are on the same side. A transparent glass observation window is provided on the lower box door 11. Since the grid-connected box mainly feeds the electrical energy generated by photovoltaic power generation into the public power grid, a metering device needs to be installed on the installation rack 7 corresponding to the lower box door 11 to accurately measure and record the power generation and transmission power of the photovoltaic power generation system. The electricity meter can be conveniently viewed through the observation window on the lower box door 11. At the same time, an alarm 4 is provided at the outer end of the main box door 2. The alarm 4 is a buzzer that can emit sound and is connected to the earth leakage protector inside the grid-connected box body 1. When it detects that the earth leakage protector trips, it will emit an alarm sound, thus warning the staff in time.

[0044] Optionally, in some embodiments, please refer to Figure 4 , the heat dissipation component 6 includes a top frame 61. The top frame 61 is fixedly installed at the top of the grid-connected box body 1. The top frame 61 is connected to the interior of the grid-connected box body 1 and there are a plurality of air outlets 62 provided at the outer end of the top frame 61.

[0045] A fixing frame 63 is fixedly connected to the inner side of the top frame 61. A plurality of cooling fans 64 are installed at the outer end of the fixing frame 63. A top cover plate 3 is detachably connected to the top end of the top frame 61. Air inlets 5 are provided on both sides of the grid-connected box body 1.

[0046] The above-mentioned top frame 61 is fixed to the top of the grid-connected box body 1 and is in a communicating state with the inside of the grid-connected box body 1. A fixing frame 63 is fixed inside the top frame 61. A plurality of cooling fans 64 are arranged on the fixing frame 63. Air outlets 62 are arranged around the top frame 61. Correspondingly, air inlets 5 are arranged on both sides of the grid-connected box body 1. When the cooling fans 64 work, the air inside the grid-connected box body 1 can be sucked into the top frame 61 and then discharged outward through the air outlets 62 on the top frame 61, so as to cool the electrical equipment inside the grid-connected box body 1. Since the density of cold air is relatively large, the height of the air inlet 5 is lower than that of the air outlet 62, so that more cold air can be sucked into the grid-connected box body 1. A top cover plate 3 is also detachably installed on the top of the top frame 61. The top cover plate 3 can be installed on the top frame 61 through a buckle, which is convenient for overhauling the inside of the top frame 61.

[0047] Optionally, in some embodiments, please refer to Figures 5 - 7 , the rail assembly 8 further includes two connecting blocks 83. Both of the two connecting blocks 83 are fixedly installed at the outer end of the slide rail 81. The slide rail 81 is fixedly installed on the inner side wall of the grid-connected box body 1 through the connecting blocks 83. A plurality of equally spaced limiting holes 82 are formed in the inner side of the slide rail 81.

[0048] The sliding assembly 9 further includes two side connecting frames 92. The two side connecting frames 92 are respectively fixed on both sides of the movable block 91. A pulley 93 is rotatably connected to the inner side of the side connecting frame 92. An annular groove 94 adapted to the abutting block 84 is formed on the outer periphery of the pulley 93.

[0049] A plurality of sliding grooves 97 are formed inside the movable block 91. A telescopic spring 96 is arranged inside each of the plurality of sliding grooves 97. Both ends of the telescopic spring 96 are fixedly connected with a limiting block 95. The limiting block 95 is slidably connected with the inner wall of the sliding groove 97. The limiting block 95 abuts against the limiting hole 82.

[0050] At the outer end of the slide rail 81 in this solution, two connecting blocks 83 are fixed. By using bolts to fix the connecting blocks 83 on the side wall of the grid-connected box body 1, the slide rail 81 can be fixed. On both sides of the slide rail 81, abutting blocks 84 are fixed. The cross-section of the abutting block 84 is semicircular. On both inner sides of the slide rail 81, two rows of limiting holes 82 are provided. The limiting holes 82 are matched with the limiting blocks 95. The bottom end of the movable block 91 is slidably connected to the slide rail 81. On both sides of the movable block 91, side connecting frames 92 are fixed. A pulley 93 is rotatably connected below the side connecting frame 92. An annular groove 94 is formed in the outer periphery of the pulley 93. The annular groove 94 is semicircular and adapted to the abutting block 84. The pulley 93 is stuck on the abutting block 84 through the annular groove 94. At the bottom of the movable block 91, a plurality of sliding grooves 97 are formed. The sliding grooves 97 penetrate through the movable block 91. A telescopic spring 96 is arranged inside the sliding grooves 97. Limiting blocks 95 are fixed at both ends of the telescopic spring 96. The end heads of the limiting blocks 95 extend outside the sliding grooves 97, and the tails slide inside the sliding grooves 97. By pushing the limiting blocks 95 outward through the telescopic spring 96, the limiting blocks 95 can be stuck in the limiting holes 82 to achieve limiting. A handle 12 is fixed at the bottom end of the mounting frame 7. When it is necessary to move the mounting frame 7, the handle 12 needs to be pulled and then pushed, so that the mounting frame 7 drives the two sliding components 9 to move on the track component 8. The pulley 93 slides on the abutting block 84 through the annular groove 94, and the limiting blocks 95 will be squeezed into the sliding grooves 97. When the movement stops, the limiting blocks 95 will re-abut against the limiting holes 82 for limiting. The movement of the mounting frame 7 can adjust the spatial layout inside the grid-connected box body 1 as needed, making the placement of the equipment more reasonable, helping to improve the utilization rate of the space, making it adapt to different specifications and quantities of equipment, and improving the flexibility of the layout.

[0051] Working principle: When using this device to adjust the space inside the grid-connected box body 1, the mounting frame 7 needs to be moved. A handle 12 is fixed at the bottom end of the mounting frame 7. After pulling the handle 12 and pushing, the mounting frame 7 drives the two sliding components 9 to move on the track component 8. The pulley 93 slides on the abutting block 84 through the annular groove 94, and the limiting blocks 95 will be squeezed into the sliding grooves 97. When the movement stops, the limiting blocks 95 will re-abut against the limiting holes 82 for limiting. By moving the mounting frame 7, the spatial layout inside the grid-connected box body 1 can be adjusted as needed, improving the utilization rate of the space and the flexibility of the layout. The top frame 61 is fixed on the top of the grid-connected box body 1. A plurality of cooling fans 64 are arranged on the fixing frame 63. The cooling fans 64 can suck the air inside the grid-connected box body 1 into the top frame 61, and then discharge it outward through the air outlet 62 on the top frame 61. The cold air enters the grid-connected box body 1 through the air inlet 5 to complete the cycle, thereby cooling the electrical equipment inside the grid-connected box body 1.

[0052] The above are only the preferred specific embodiments of the present utility model; however, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and its improved concept of the present utility model, making equivalent replacements or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A low-voltage photovoltaic grid-connected box with a leakage alarm function, comprising a grid-connected box body (1), characterized in that: Inside the grid-connected box body (1), a pair of symmetrically distributed track components (8) are provided. At the top of each of the pair of track components (8), a sliding component (9) is provided. At the top of the sliding component (9), a mounting frame (7) is provided. The mounting frame (7) is located inside the grid-connected box body (1), and a heat dissipation component (6) is provided at the top of the grid-connected box body (1). The track component (8) includes a slide rail (81), and abutting blocks (84) are fixedly connected to both sides of the slide rail (81). The sliding component (9) includes a movable block (91). The movable block (91) is adapted to the slide rail (81), and the movable block (91) is slidably connected to the slide rail (81). The bottom end of the mounting frame (7) is fixedly connected to the top end of the movable block (91).

2. The low-voltage photovoltaic grid-connected box with a leakage alarm function according to claim 1, wherein: A main box door (2) is rotatably connected to the outer end of the grid-connected box body (1), and an upper box door (10) and a lower box door (11) are respectively rotatably connected to one side of the grid-connected box body (1) away from the main box door (2). An alarm (4) is installed on the outer end of the main box door (2), and a handle (12) is fixedly connected to the bottom end of the mounting frame (7).

3. A low-voltage photovoltaic grid-connected box with a leakage alarm function according to claim 1, characterized in that: The heat dissipation component (6) includes a top frame (61). The top frame (61) is fixedly installed at the top of the grid-connected box body (1). The top frame (61) is communicated with the inside of the grid-connected box body (1), and a plurality of air outlets (62) are provided at the outer end of the top frame (61).

4. A low-voltage photovoltaic grid-connected box with a leakage alarm function according to claim 3, characterized in that: A fixing frame (63) is fixedly connected to the inner side of the top frame (61). A plurality of heat dissipation fans (64) are installed at the outer end of the fixing frame (63). A top cover plate (3) is detachably connected to the top of the top frame (61). Air inlets (5) are provided on both sides of the grid-connected box body (1).

5. A low-voltage photovoltaic grid-connected box with a leakage alarm function according to claim 1, characterized in that: The track component (8) further includes two connecting blocks (83). Both of the two connecting blocks (83) are fixedly installed at the outer end of the slide rail (81). The slide rail (81) is fixedly installed on the inner side wall of the grid-connected box body (1) through the connecting blocks (83). A plurality of equally spaced limiting holes (82) are provided inside the slide rail ( 6. The low-voltage photovoltaic grid-connected box with a leakage alarm function according to claim 5, characterized in that: ​ 7. A low-voltage photovoltaic grid-connected box with a leakage alarm function according to claim 6, characterized in that: ​

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