Photovoltaic DC combiner box

Abstract

The utility model provides a photovoltaic DC combiner box. Relates to the technical field of photovoltaic combiner boxes. The device comprises a base, a fixing mechanism and a protection frame. The base is provided with a plurality of mounting grooves, the base is provided with DC confluence electrical parts which are all connected with the corresponding mounting grooves, the base is provided with a protection frame, the protection frame sleeves the DC confluence electrical parts, and the fixing mechanisms are arranged in the mounting grooves and are connected with the protection frame; and the fixing mechanism comprises limiting rods, a connecting plate, a cover plate and fixing bolts, and the limiting rods are in threaded connection with the interiors of four of the multiple mounting grooves. The photovoltaic direct-current combiner box provided by the utility model has the advantages that the effect of facilitating wiring of external cables by workers and the effect of facilitating maintenance and replacement of the direct-current convergence electrical elements by the workers can be achieved through cooperation of all the components.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic combiner box technology, and in particular to a photovoltaic DC combiner box. Background Technology

[0002] A photovoltaic combiner box is a wiring device in a photovoltaic power generation system that ensures the orderly connection of photovoltaic modules and the function of current collection. It means that users can connect a certain number of photovoltaic cells of the same specifications in series to form photovoltaic strings, and then connect several photovoltaic strings in parallel to the photovoltaic combiner box. After current collection in the photovoltaic combiner box, it is used in conjunction with a controller, DC distribution cabinet, photovoltaic inverter, and AC distribution cabinet to form a complete photovoltaic power generation system and achieve grid connection with the mains power.

[0003] The common photovoltaic DC combiner box in the prior art is a hollow cuboid structure with a box cover. Electrical components are installed inside the photovoltaic DC combiner box. Cables are connected to the photovoltaic DC combiner box and then led out of the photovoltaic DC combiner box.

[0004] Due to the limited internal space of the photovoltaic DC combiner box, the side wall of the box obstructs the wiring operation after the electrical components are installed. The limited space makes wiring difficult, and it also makes it difficult to inspect and replace electrical components during subsequent maintenance.

[0005] Therefore, this utility model provides a photovoltaic DC combiner box to solve the above problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, the present invention provides a photovoltaic DC combiner box comprising: a base, a fixing mechanism, and a protective frame;

[0007] The base has multiple mounting slots, and a DC busbar electrical component is provided on the base and connected to the corresponding mounting slot by screws. The base has a protective frame, which is fitted onto the DC busbar electrical component. The fixing mechanism is located in the mounting slot and connected to the protective frame.

[0008] The fixing mechanism includes a limiting rod, a connecting plate, a cover plate, and fixing bolts. Four of the multiple mounting slots are threaded with limiting rods, and all four limiting rods are engaged with the protective frame. Through the cooperative design between the base, mounting slots, protective frame, and fixing mechanism, it is possible to facilitate the wiring of external cables by staff and to facilitate the maintenance and replacement of the DC bus electrical components, greatly improving convenience and practicality.

[0009] Preferably, one end of each of the four limiting rods is slidably connected to a connecting plate, and one end of each of the four connecting plates is fixedly connected to the same cover plate. The cover plate abuts against the protective frame to limit the movement of the protective frame. At the same time, the cover plate, the protective frame, and the base together form a DC combiner box, thereby achieving the effect of protecting the DC combiner electrical components.

[0010] Preferably, the four connecting plates are threaded with fixing bolts, and one end of each fixing bolt is threaded to one of the four limiting rods, thereby connecting the four connecting plates to the four limiting rods.

[0011] Preferably, a sealing gasket is fixedly installed on one side of the protective frame, and the sealing gasket fits tightly with the base to improve the sealing performance and prevent liquid from entering the protective frame.

[0012] Preferably, the inner side of the protective frame is provided with four limiting grooves, and the four limiting rods are respectively engaged with the four limiting grooves. The interaction between the four limiting rods and the four limiting grooves can achieve the effect of limiting the protective frame.

[0013] Preferably, one end of each of the four limiting rods is provided with a threaded groove, and the four threaded grooves are respectively adapted to the four fixing bolts to facilitate connection with the four fixing bolts.

[0014] Preferably, the cover plate is provided with a door, which allows staff to easily observe the DC bus electrical component. The bottom plate of the protective frame has multiple through holes to facilitate the connection of external cables to the DC bus electrical component. The base has mounting holes to facilitate the installation of the base.

[0015] Preferably, each of the multiple mounting slots is provided with an internal thread, and one end of each of the four limiting rods is provided with an external thread that is adapted to the internal thread. The DC bus electrical components are all fixedly installed in the corresponding mounting slots by screws, and the threads on the multiple screws are adapted to the internal threads, making them detachable.

[0016] Compared with related technologies, the photovoltaic DC combiner box provided by this utility model has the following beneficial effects:

[0017] This utility model provides a photovoltaic DC combiner box. Through the coordinated design of the base, mounting groove, protective frame and fixing mechanism, it can facilitate the wiring of external cables by the staff and make it easy for the staff to inspect and replace the DC combiner electrical components, greatly improving convenience and practicality. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of a photovoltaic DC combiner box provided by this utility model;

[0019] Figure 2 An exploded view of a photovoltaic DC combiner box provided by this utility model;

[0020] Figure 3 This is a structural diagram of the cover plate, connecting plate, limiting rod, fixing bolts, box door, and threaded groove 1.

[0021] Figure 4 This is a structural diagram of the limit rod, connecting plate, fixing bolt, and threaded groove.

[0022] The following are labeled in the diagram: 1. Base; 2. Mounting groove; 3. Limiting rod; 4. Protective frame; 5. Connecting plate; 6. Cover plate; 7. Fixing bolt; 8. Box door; 9. Sealing gasket; 10. Mounting hole; 11. Limiting groove; 12. Threaded groove one; 13. Through hole. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to the following: Figures 1-4 A photovoltaic DC combiner box includes: a base 1, a fixing mechanism, and a protective frame 4;

[0025] The base 1 has multiple mounting slots 2. A DC busbar electrical component is mounted on the base 1 and connected to the corresponding mounting slot 2 via screws. A protective frame 4 is mounted on the base 1 and fits onto the DC busbar electrical component. A fixing mechanism is located within the mounting slot 2 and connected to the protective frame 4. The DC busbar electrical component includes a controller, a photovoltaic inverter, photovoltaic cells, etc. Through the interaction of the controller, photovoltaic inverter, photovoltaic cells, etc., with the DC distribution cabinet and AC distribution cabinet, a complete photovoltaic power generation system is formed, achieving grid connection with the mains power. The DC busbar electrical component is existing technology and will not be described in detail here.

[0026] The fixing mechanism includes a limiting rod 3, a connecting plate 5, a cover plate 6, and fixing bolts 7. Four of the multiple mounting slots 2 are threadedly connected to the limiting rod 3, and the four limiting rods 3 are snapped into the protective frame 4. Through the cooperative design between the base 1, the mounting slots 2, the protective frame 4, and the fixing mechanism, it is possible to facilitate the wiring of external cables by the staff, and to facilitate the maintenance and replacement of DC bus electrical components by the staff, which greatly improves convenience and practicality.

[0027] See attached document Figure 2-3Each of the four limit rods 3 has a connecting plate 5 slidably connected to one end, and the same cover plate 6 is fixedly connected to one end of each of the four connecting plates 5. The cover plate 6 abuts against the protective frame 4 and is used to limit the movement of the protective frame 4. At the same time, the cover plate 6, the protective frame 4 and the base 1 form a DC combiner box, thereby achieving the effect of protecting the DC combiner electrical components. The four connecting plates 5 are threaded with fixing bolts 7, and one end of each fixing bolt 7 is threadedly connected to the four limit rods 3. The four fixing bolts 7 connect the four connecting plates 5 to the four limit rods 3 respectively.

[0028] See attached document Figure 1-2 A sealing gasket 9 is fixedly installed on one side of the protective frame 4. The sealing gasket 9 fits tightly with the base 1 to improve the sealing performance and prevent liquid from entering the protective frame 4.

[0029] See attached document Figure 2 The inner side of the protective frame 4 is provided with four limiting grooves 11, and four limiting rods 3 are respectively engaged with the four limiting grooves 11. The interaction between the four limiting rods 3 and the four limiting grooves 11 can achieve the effect of limiting the protective frame 4.

[0030] See attached document Figure 4 Each of the four limit rods 3 has a threaded groove 12 at one end, and the four threaded grooves 12 are respectively adapted to the four fixing bolts 7, so as to facilitate the connection with the four fixing bolts 7.

[0031] See attached document Figure 2 The cover plate 6 is equipped with a door 8, which allows staff to easily observe the DC bus electrical components. The bottom plate of the protective frame 4 has multiple through holes 13, which facilitates the connection of external cables to the DC bus electrical components. The base 1 has mounting holes 10, which facilitates the installation of the base 1. Multiple mounting slots 2 are all threaded internally, and one end of each of the four limit rods 3 is threaded externally and is compatible with the internal threads. The DC bus electrical components are all fixedly installed in the corresponding mounting slots by screws. The threads on the multiple screws are compatible with the internal threads, making them detachable.

[0032] The working principle of the photovoltaic DC combiner box provided by this utility model is as follows: In use, firstly, the DC combiner electrical component is fixedly installed on the base 1 by screws. Then, one end of the external cable is passed through the through hole 13 on the protective frame 4 and connected to the corresponding DC combiner electrical component. After that, four limiting rods 3 are installed around the DC combiner electrical component and correspond to the four limiting grooves 11 on the protective frame 4. Then, the limiting grooves 11 on the protective frame 4 are respectively aligned with the four limiting rods 3 and the protective frame 4 is pushed, so that the protective frame 4 slides on the four limiting rods 3 and the sealing gasket 9 on one side of the protective frame 4 contacts and connects with the base 1, thereby achieving the purpose of the protective frame 4 being fitted on the DC combiner electrical component.

[0033] Then, insert the four connecting plates 5 on the cover plate 6 into the protective frame 4, and connect the four connecting plates 5 to one end of the four limit rods 3 respectively, and make the four fixing bolts 7 correspond to the threaded grooves 12 on the four limit rods 3 respectively and make threaded connections, thereby achieving the effect of limiting the protective frame 4; thereby achieving the effect of protecting the DC bus electrical components, and at the same time achieving the effect of facilitating the wiring by the staff.

[0034] When it is necessary to repair or replace the DC bus electrical components, the above steps can be reversed to disassemble the protective frame 4, thereby facilitating the repair or replacement of the DC bus electrical components and improving convenience.

[0035] Compared with related technologies, the photovoltaic DC combiner box provided by this utility model has the following beneficial effects: through the cooperation of various components, it can facilitate the wiring of external cables by staff, and facilitate the maintenance and replacement of DC combiner electrical components by staff, greatly improving convenience and practicality.

[0036] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A photovoltaic DC combiner box, comprising a base (1), a fixing mechanism and a protective frame (4); The base (1) is provided with multiple mounting slots (2), the base (1) is provided with DC bus electrical components and is connected to the corresponding mounting slots (2) by screws, the base (1) is provided with a protective frame (4), the protective frame (4) is sleeved on the DC bus electrical components, and the fixing mechanism is set in the mounting slots (2) and connected to the protective frame (4); The fixing mechanism includes a limiting rod (3), a connecting plate (5), a cover plate (6), and a fixing bolt (7). The limiting rod (3) is threaded into four of the multiple mounting slots (2), and the four limiting rods (3) are engaged with the protective frame (4).

2. The photovoltaic DC combiner box according to claim 1, characterized in that, One end of each of the four limiting rods (3) is slidably connected to a connecting plate (5), and one end of each of the four connecting plates (5) is fixedly connected to the same cover plate (6), which abuts against the protective frame (4).

3. A photovoltaic DC combiner box according to claim 2, characterized in that, The four connecting plates (5) are threaded with fixing bolts (7), and one end of the four fixing bolts (7) is threadedly connected to the four limiting rods (3).

4. A photovoltaic DC combiner box according to claim 1, characterized in that, A sealing gasket (9) is fixedly installed on one side of the protective frame (4), and the sealing gasket (9) is in close contact with the base (1).

5. A photovoltaic DC combiner box according to claim 1, characterized in that, The inner side of the protective frame (4) is provided with four limiting grooves (11), and the four limiting rods (3) are respectively engaged with the four limiting grooves (11).

6. A photovoltaic DC combiner box according to claim 3, characterized in that, One end of each of the four limiting rods (3) is provided with a threaded groove (12), and the four threaded grooves (12) are respectively adapted to the four fixing bolts (7).

7. A photovoltaic DC combiner box according to claim 2, characterized in that, The cover plate (6) is provided with a door (8), the bottom plate of the protective frame (4) is provided with multiple through holes (13), and the base (1) is provided with mounting holes (10).

8. A photovoltaic DC combiner box according to claim 1, characterized in that, Each of the mounting slots (2) has an internal thread, and one end of each of the four limiting rods (3) has an external thread that is compatible with the internal thread. The DC bus electrical components are all fixedly installed in the corresponding mounting slots by screws, and the threads on the screws are compatible with the internal threads.

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