A photovoltaic grid-connected distribution box

Abstract

This utility model belongs to the field of photovoltaic technology, and in particular to a photovoltaic grid-connected distribution box. This utility model features movable rods installed in the grooves on both sides of the base. By pulling a handle on one side of the movable mounting frame through a slot at the bottom of the mounting frame, the movable mounting frame can be moved within the outer casing. This allows for free adjustment of the movable mounting frame's position on the base during maintenance, effectively reducing the impact of internal space constraints caused by the fixed mounting plate. Furthermore, the fixed and movable limiting rods installed inside the bracket restrict the movement of internal cables as they follow the movable mounting frame. The movable limiting rods' ability to move on the bracket also serves as a cable management feature.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically a photovoltaic grid-connected distribution box. Background Technology

[0002] Grid-connected photovoltaic (PV) power generation systems convert the direct current (DC) output from solar cell arrays into alternating current (AC) with the same amplitude, frequency, and phase as the grid voltage, enabling connection to the grid and the transmission of electrical energy. The flexibility of this system lies in its ability to supply excess energy to the grid while simultaneously powering AC loads during periods of strong sunlight; conversely, when sunlight is insufficient and the solar cell array cannot provide enough power, it can draw power from the grid to supply the loads. Grid-connected PV distribution boxes are crucial devices connecting the PV power generation system to the grid, primarily used for protecting, metering, and monitoring the generated electricity to ensure safe and efficient grid connection.

[0003] To ensure the continuity and stability of photovoltaic power generation, the distribution box needs to be inspected regularly. When inspecting traditional photovoltaic grid-connected distribution boxes, the wiring inside the distribution box is relatively complex, and the mounting plate is usually fixed inside the box. Due to the limited space inside the box, this brings a lot of inconvenience to the maintenance personnel and affects the maintenance efficiency.

[0004] Therefore, we propose a photovoltaic grid-connected distribution box to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a photovoltaic grid-connected distribution box, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A photovoltaic grid-connected distribution box includes: an outer shell, a base fixed to the bottom of the outer shell, a bracket fixed to the base, and a movable mounting frame located inside the outer shell and mounted on the base.

[0010] It also includes: two sets of grooves are respectively opened on the top of the outer shell and the bottom of the base, and a set of moving rods are installed in each set of grooves. The top and bottom of the movable mounting frame are respectively opened on the sides of the movable mounting frame to cooperate with the moving rods. The movable mounting frame is installed inside the outer shell and on the base through the round holes, allowing the movable mounting frame to move along the setting direction of the moving rods.

[0011] Two identical waist-shaped slots are provided on both sides of the bracket. The size of the waist-shaped slots matches the two sides of the movable limit rod, allowing the movable limit rod to be installed inside the bracket while the bracket can move along the direction of the waist-shaped slots.

[0012] Furthermore, two sets of fixing plates are fixed above the circular hole at the bottom of the mobile mounting frame. The fixing plates have slots, and the top middle part of the base has multiple sets of threaded holes of the same size as the fixing plates. The two sides of the mobile mounting frame are threadedly connected and fixed to the threaded holes on the base by positioning bolts.

[0013] Furthermore, two sets of waist-shaped slots are provided on the top of both sides of the bracket. The internal dimensions of the waist-shaped slots are the same as those of the positioning bolts. The positioning bolts and positioning nuts are installed in the waist-shaped slots on the top of the bracket by threaded connection.

[0014] Furthermore, multiple sets of ventilation openings are provided on both sides of the outer casing, and each set of ventilation openings is equipped with a cooling fan.

[0015] Furthermore, two sets of circular holes are respectively opened on the inner walls on both sides of the bracket, and the two sets of fixed limiting rods are installed inside the bracket through protrusions of the same size as the circular holes fixed on both sides for rotational connection.

[0016] Beneficial effects

[0017] Compared with the prior art, this utility model provides a photovoltaic grid-connected distribution box, which has the following beneficial effects:

[0018] This invention, by setting movable rods installed in the grooves on both sides of the base, allows the movable mounting frame to move inside the housing by pulling a handle on one side of the frame through a slot at the bottom of the frame. This allows for free adjustment of the position of the movable mounting frame on the base during maintenance, effectively reducing the impact of internal space constraints caused by the fixed mounting plate. Furthermore, the fixed limit rod and movable limit rod installed inside the bracket also restrict the movement of internal cables as they follow the movable mounting frame. The movable limit rod's ability to move on the bracket also serves to manage cables. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection of the mobile mounting bracket of this utility model;

[0021] Figure 3 This is a schematic diagram of the base structure of this utility model;

[0022] Figure 4This is a schematic diagram of the movable limiting rod structure of this utility model;

[0023] Figure 5 This is a schematic diagram showing the cable position of this utility model.

[0024] In the diagram: 1. Outer shell; 2. Base; 3. Movable mounting bracket; 4. Bracket; 5. Fixed limit rod; 6. Movable limit rod; 7. Positioning bolt; 8. Positioning nut; 9. Movable rod; 10. Cooling fan; 11. Fixing plate; 12. Cable; 13. Handle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] like Figure 1-5As shown in the figure, an embodiment of the present invention discloses a photovoltaic grid-connected distribution box, comprising: a shell 1, a base 2 fixed to the bottom of the shell 1, a bracket 4 fixed to the base 2, and a movable mounting frame 3 located inside the shell 1 and mounted on the base 2; further comprising: two sets of grooves respectively formed on the top of the shell 1 and the bottom of the base 2, each set of grooves containing a set of movable rods 9; and round holes formed on the top and bottom of the movable mounting frame 3 to mate with the movable rods 9, the movable mounting frame 3 being installed inside the shell 1 and the base 2 through the round holes. The movable mounting bracket 3 is allowed to move along the direction of the movable rod 9. Two sets of fixing plates 11 are fixed above the round hole at the bottom of the movable mounting bracket 3. The fixing plates 11 have slots. Multiple sets of threaded holes of the same size as those on the fixing plates 11 are opened in the middle of the top of the base 2. The two sides of the movable mounting bracket 3 are threadedly connected to the threaded holes on the base 2 using positioning bolts 7. When inspecting the inside of the distribution box, the two sets of positioning bolts 7 on the movable mounting bracket 3 can be removed to adjust its position. Two sets of identical waist-shaped slots are opened on both sides of the bracket 4. The size of the waist-shaped slots matches the two sides of the movable limiting rod 6, allowing the movable limiting rod 6 to be installed inside the bracket 4 while the bracket 4 can move along the direction of the waist-shaped slots. Two sets of round holes are opened on the inside of both sides of the bracket 4. Two sets of fixed limiting rods 5 are installed inside the bracket 4 through protrusions of the same size as the round holes fixed on both sides, allowing the fixed limiting rods 5 and the movable limiting rods 6 to rotate on the bracket 4. Two sets of waist-shaped slots are provided on the top of both sides of the bracket 4. The internal size of the waist-shaped slots matches that of the positioning bolts 7, allowing the positioning bolts 7 to pass through. The positioning bolts 7 and positioning nuts 8 are connected by threads and installed in the waist-shaped slots on the top of the bracket 4. The positioning bolts 7 and positioning nuts 8 can limit the movement of the moving limit rods 6 in the other set of waist-shaped slots. They can also assist in cable management by pushing the moving limit rods 6. The position of the positioning bolts 7 can be adjusted according to the number of cables 12 inside the distribution box, so that the position of the cables 12 can be fixed when the distribution box is in operation. Since both the fixed limit rods 5 and the moving limit rods 6 can rotate, the cable sheaths of the cables 12 inside the distribution box can be prevented from being damaged by friction when installing them. Multiple sets of ventilation openings are provided on both sides of the outer casing 1. Each set of ventilation openings is equipped with a cooling fan 10 for cooling the electrical appliances inside the distribution box.

[0028] When installing the distribution box, leave enough cable 12 to allow the movable mounting bracket 3 to move. Simply feed the cable 12 into the inlet on the bottom of the base 2, then pass the cable 12 through the lower set of fixed limit rods 5, and then pass it between the movable limit rod 6 and the upper set of fixed limit rods 5 to connect it to the electrical appliance installed on the upper movable mounting bracket 3. Finally, move the movable limit rod 6 to one side of the waist-shaped groove. The fixed limit rods 5 and the movable limit rod 6 limit the cable 12, which also serves to manage the cable and facilitates the operation of the installer. During maintenance, simply remove the positioning bolts 7 installed on both sides of the movable mounting bracket 3 and the bracket 4, respectively. Use the handle 13 installed on one side of the movable mounting bracket 3 to pull it inward or outward. While the movable mounting bracket 3 is moving, the movement limit rod 6 installed in the lower bracket 4 no longer limits the cable 12. The cable 12 connected to the movable mounting bracket 3 only needs a slight force to move the movement limit rod 6, which can avoid pulling and damaging the electrical appliances installed on the movable mounting bracket 3. After maintenance, simply push the movable mounting bracket 3 back to its original position and fix it to the base 2 using the positioning bolts 7. Then push the movement limit rod 6 again to move the cable 12 back to its original position. This can effectively reduce the impact of internal space restriction caused by the fixed mounting plate, and the operation is simple, which can effectively improve maintenance efficiency and shorten maintenance time.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic grid-tie distribution box, comprising: The outer casing (1), the base (2) fixed at the bottom of the outer casing (1), the bracket (4) fixed on the base (2), and the movable mounting bracket (3) located inside the outer casing (1) and mounted on the base (2). The feature is that: two sets of grooves are respectively opened on the top of the outer shell (1) and the bottom of the base (2), and a set of moving rods (9) are installed in each set of grooves. The top and bottom of the movable mounting frame (3) are respectively opened on both sides of the top and bottom, and round holes that cooperate with the moving rods (9). The movable mounting frame (3) is installed inside the outer shell (1) and on the base (2) through the round holes, allowing the movable mounting frame (3) to move along the setting direction of the moving rods (9); Two sets of identical waist-shaped slots are provided on both sides of the bracket (4). The size of the waist-shaped slots matches the two sides of the moving limit rod (6), allowing the moving limit rod (6) to be installed inside the bracket (4) while enabling the bracket (4) to move along the direction of the waist-shaped slots.

2. A photovoltaic grid-tie distribution box according to claim 1, wherein: Two sets of fixing plates (11) are fixed above the round hole at the bottom of the mobile mounting frame (3). The fixing plates (11) have slots. The middle part of the top of the base (2) has multiple sets of threaded holes of the same size as the fixing plates (11). The two sides of the mobile mounting frame (3) are threadedly connected to the threaded holes on the base (2) by positioning bolts (7).

3. A photovoltaic grid-connected distribution box according to claim 1, characterized in that: The bracket (4) has two sets of waist-shaped slots on the top of both sides. The size of the waist-shaped slots is the same as that of the positioning bolts (7). The positioning bolts (7) and positioning nuts (8) are connected by threads and installed in the waist-shaped slots on the top of the bracket (4).

4. A photovoltaic grid-connected distribution box according to claim 1, characterized in that: Multiple sets of ventilation openings are provided on both sides of the outer shell (1), and each set of ventilation openings is equipped with a cooling fan (10).

5. A photovoltaic grid-connected distribution box according to claim 1, characterized in that: Two sets of round holes are respectively opened on the inner walls of both sides of the bracket (4). Two sets of fixed limiting rods (5) are installed inside the bracket (4) through protrusions of the same size as the round holes fixed on both sides for rotational connection.

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