Low-voltage grid-connected box for distributed photovoltaic power station

Abstract

The utility model discloses a kind of low-voltage grid-connected boxes for distributed photovoltaic power station, the low-voltage grid-connected boxes for distributed photovoltaic power station include first box, the first box is equipped with first box door, one end of the first box is equipped with liftable second box, every outer lateral surface of the first box is equipped with limiting through-hole, every lateral surface of the second box is equipped with fastener, and be slidably arranged in limiting through-hole, the second box is equipped with second box door, and be slidably arranged in first box door. By setting movable second box, realize the flexible adjustment of space between first box and second box, it is convenient to flexibly adjust according to on-site condition, not only improve the adaptability of equipment, but also effectively improve space utilization, in the second box activity process, second box door is lifted with box, reduces assembly step, improves adjustment efficiency, inserts partition to form different equipment area, so that product has the advantages of improving grid-connection efficiency, flexible adjustment, good adaptability, reduce warehousing cost.

Description

Technical Field

[0001] This utility model relates to the field of grid connection box technology, and in particular to a low-voltage grid connection box for distributed photovoltaic power stations. Background Technology

[0002] A photovoltaic grid-connected box is a crucial piece of equipment in a photovoltaic power generation system. It ensures a safe and efficient connection between the photovoltaic system and the power grid, reduces system failure rates, lowers maintenance costs, and promotes the development of clean energy. A smart photovoltaic grid-connected box, as an intelligent electrical device, converts the direct current (DC) generated by the photovoltaic system into alternating current (AC) and connects it to the power grid.

[0003] It typically includes components such as inverters, distribution cabinets, protection devices, and monitoring systems, and has the functions of monitoring, controlling, and protecting the system to ensure the safe operation and grid-connected power generation of the photovoltaic power station. The equipment consists of photovoltaic inverters, power protection switches, current transformers, energy meters, PLC controllers, temperature sensors, and communication modules. The inverter is responsible for converting electrical energy into its form; the protection switches prevent overcurrent and reverse current; the current transformers and energy meters are used for energy monitoring and measurement; the PLC controller is used for system control; and the temperature sensors and communication modules are used for status monitoring and remote communication.

[0004] In existing grid-connected boxes, electrical equipment of different specifications and sizes is installed according to site requirements, which often necessitates custom-made boxes, increasing design and installation cycles, extending delivery time, and affecting grid connection efficiency. To address these issues, this application proposes an improved technical solution, which is described below in this context. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the traditional grid connection box design and provide a product that improves grid connection efficiency, allows for flexible adjustment, has good adaptability, and reduces storage costs.

[0006] A low-voltage grid-connected box for a distributed photovoltaic power station includes a first box body with a first box door. A second box body that can be lifted and lowered is provided at one end of the first box body. Each outer side wall of the first box body is provided with a limiting through hole. Each side wall of the second box body is provided with a fastener and slidably disposed in the limiting through hole. The second box body is provided with a second box door and slidably disposed in the first box door. The first box body and the second box body are provided with a plurality of equally spaced fixing slots from top to bottom. A partition is inserted into any of the fixing slots to divide different equipment areas.

[0007] Preferably, the end face of the first housing is provided with a recessed cavity, and the limiting through hole is provided on the outer wall surface of the recessed cavity.

[0008] Preferably, a protrusion that wraps around the first door is provided at the front entrance of the first box body, and one side of one of the protrusions is provided with an inclined clearance groove for opening and closing the first door.

[0009] Preferably, the back of the first door is provided with a clearance groove to accommodate the second door, and guide grooves are provided on both sides of the clearance groove.

[0010] Preferably, the second door is provided with a guide block and is slidably disposed in the guide groove, and the two sides of the second door are provided with first extensions that are close to the inner wall surfaces of the first and second boxes.

[0011] Preferably, the fixing groove is disposed on the inner wall surface of the first housing, and the fixing groove maintains a distance from the side walls of the first housing and the second housing that is offset from the first extension.

[0012] Preferably, the end face of the second housing is provided with a second extension and is slidably disposed in the cavity. The second extension is provided with a positioning hole, and the fastener is threadedly connected to the positioning hole. The fastener is configured as a fastening screw.

[0013] Preferably, the partition has at least one spring piece on each side and acts on the end face of the fixing groove. The spring piece has connecting parts on both sides and is embedded in the side walls of the partition. The partition has at least one gripping groove. Beneficial effects

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, by incorporating a movable second enclosure, allows for flexible adjustment of the space between the first and second enclosures. This facilitates adaptation to actual site requirements, improving installation convenience and space utilization. During installation, the fasteners are first loosened to release the second enclosure from its fixed position, allowing it to move freely. The first and second enclosures can then be placed parallel to each other, and the distance between them can be adjusted to optimize the internal structural layout. After adjustment, the fasteners on both sides and the back of the first enclosure are gradually tightened to stabilize the position of the second enclosure, ensuring stability during use. The second enclosure door moves synchronously with the second enclosure, reducing assembly steps and improving installation efficiency. Subsequently, partitions are inserted into fixed slots at different locations according to the specifications of the electrical equipment, forming equipment areas with varying spaces. This design effectively reduces the time cost of equipment installation and commissioning, improves overall assembly efficiency, and reduces the management complexity for manufacturers during warehousing and transportation. Furthermore, the structure possesses good adaptability and adjustability, facilitating rapid deployment in different application scenarios and enhancing the product's market applicability and competitiveness. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of a low-voltage grid-connected box for a distributed photovoltaic power station according to this utility model; Figure 2 This is a side cross-sectional view of a low-voltage grid-connected box for a distributed photovoltaic power station according to the present invention. Figure 3 This is a schematic diagram of the exploded structure of a low-voltage grid-connected box for a distributed photovoltaic power station according to this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the exploded structure of a low-voltage grid-connected box for a distributed photovoltaic power station according to this utility model. Figure 2 ; Figure 5 This is an exploded structural diagram of the partition of a low-voltage grid-connected box for a distributed photovoltaic power station according to the present invention. Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle; The correspondence between the labels and component names in the attached figures is as follows: Reference numerals: 1. First housing; 2. First door; 3. Second housing; 4. Second door; 5. Fastener; 6. Fixing groove; 7. Partition; 11. Limiting through hole; 12. Cavity; 13. Protrusion; 131. Clearance groove; 21. Relief groove; 22. Guide groove; 31. Second extension; 32. Positioning hole; 41. Guide block; 42. First extension; 71. Spring piece; 72. Connecting part; 73. Grip groove. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0019] Reference example Figures 1 to 6 A low-voltage grid-connected box for a distributed photovoltaic power station includes a first box body 1, a first box body 1 with a first box door 2, a liftable second box body 3 at one end of the first box body 1, a limiting through hole 11 on each outer side wall of the first box body 1, a fastener 5 on each side wall of the second box body 3 and slidably disposed in the limiting through hole 11, a second box door 4 on the second box body 3 and slidably disposed in the first box door 2, and a plurality of equally spaced fixing slots 6 on the first box body 1 and the second box body 3 from top to bottom, with partitions 7 inserted into any fixing slot 6 to divide different equipment areas; It is worth mentioning that the end face of the first housing 1 is provided with a cavity 12, and a limiting through hole 11 is provided on the outer wall of the cavity 12. The cavity 12 provides a guiding function for the second extension 31, and the limiting through hole 11 restricts the movement space of the second housing 3. It is worth mentioning that a protrusion 13 is provided at the front entrance of the first box 1, which is wrapped around the first box door 2. One side of one of the protrusions 13 is provided with an inclined clearance groove 131 for the opening and closing of the first box door 2. The protrusion 13 reduces the gap between the first box door 2, the second box door 4 and the first box 1. It is worth mentioning that the back of the first door 2 is provided with a clearance groove 21 to accommodate the second door 4, and guide grooves 22 are provided on both sides of the clearance groove 21. The guide grooves 22 provide guidance for the lifting and lowering of the second door 4. It is worth mentioning that the second door 4 is provided with a guide block 41 and is slidably disposed in the guide groove 22. The second door 4 is provided with first extensions 42 on both sides and close to the inner wall surfaces of the first box body 1 and the second box body 3. The first extensions 42 prevent rainwater or dust from entering the box body through the gap between the extensions and the second box body 3. It is worth mentioning that the fixing groove 6 is provided on the inner wall surface of the first housing 1, and the fixing groove 6 maintains a distance from the side wall surfaces of the first housing 1 and the second housing 3 that is offset from the first extension 42. It is worth mentioning that the end face of the second housing 3 is provided with a second extension 31, which is slidably disposed in the cavity 12. The second extension 31 is provided with a positioning hole 32, and the fastener 5 is threadedly connected to the positioning hole 32. The fastener 5 is a fastening screw. By tightening the fastener 5, the second extension 31 is tightly abutted against the side wall of the cavity 12. It is worth noting that each side wall of the first housing 1 has at least one limiting through hole 11, and the number of positioning holes 32 corresponds to the number of limiting through holes 11. The more fasteners 5 there are, the more secure the connection between the first housing 1 and the second housing 3. It is worth mentioning that at least one spring piece 71 is provided on both sides of the partition 7 and acts on the end face of the fixing groove 6. Connecting parts 72 are provided on both sides of the spring piece 71 and are embedded in the side walls of the partition 7. The partition 7 is provided with at least one gripping groove 73. The connecting parts 72 are connected to the partition 7 by interference fit. The spring piece 71 has an arched structure and protrudes from the surface of the partition 7. The operator inserts the partition 7 into the fixing groove 6 through the gripping groove 73. The spring piece 71 stores energy under force and releases the force to the fixing groove 6, thereby enhancing the friction between the partition 7 and the fixing groove 6, thus forming a fixed connection.

[0020] The working principle of this utility model is described as follows: By setting up a movable second enclosure 3, the space between the first enclosure 1 and the second enclosure 3 can be flexibly adjusted, making it easy to adapt to the actual needs on site and improving the convenience of installation and space utilization. During installation, first loosen all fasteners 5 to release the second box 3 from its fixed state, allowing it to move freely. The first box 1 and the second box 3 can be placed parallel to each other on the ground. Pull the second box 3 to adjust the distance between them and optimize the internal structural layout. After adjustment, the fasteners 5 on both sides of the first housing 1 are tightened first, then the first housing 1 and the second housing 3 are erected, and finally the fasteners 5 on the back of the first housing 1 are tightened to achieve stable fixation of the position of the second housing 3, ensuring that the structure remains stable during use. The second door 4 moves synchronously with the movement of the second housing 3, reducing the operation steps in the assembly process and improving installation efficiency. Then, according to the size of the electrical equipment, partitions 7 are inserted into the fixing slots 6 at different positions to form equipment areas in different spaces. This design effectively reduces the time and cost of equipment installation and commissioning, improves overall assembly efficiency, and reduces the management complexity for manufacturers in the warehousing and transportation process. In addition, the structure has good adaptability and adjustability, making it easy to deploy quickly in different application scenarios and enhancing the product's applicability and competitiveness in the market.

[0021] The above design scheme can enable the product to achieve the advantages of improved grid connection efficiency, flexible adjustment, good adaptability, and reduced warehousing costs.

[0022] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A low-voltage grid-connected box for a distributed photovoltaic power station, comprising a first box body (1), wherein the first box body (1) is provided with a first box door (2), characterized in that: One end of the first box (1) is provided with a liftable second box (3). Each outer side wall of the first box (1) is provided with a limiting through hole (11). Each side wall of the second box (3) is provided with a fastener (5) and is slidably disposed in the limiting through hole (11). The second box (3) is provided with a second door (4) and is slidably disposed in the first door (2). The first box (1) and the second box (3) are provided with several equally spaced fixing slots (6) from top to bottom. Any fixing slot (6) is provided with a partition (7) to divide different equipment areas.

2. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 1, characterized in that: The end face of the first box (1) is provided with a cavity (12), and the limiting through hole (11) is provided on the outer wall surface of the cavity (12).

3. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 1, characterized in that: The first box (1) has a protrusion (13) that wraps around the first box door (2) at the front entrance. One of the protrusions (13) has an inclined clearance groove (131) on one side for the first box door (2) to open and close.

4. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 1, characterized in that: The back of the first door (2) is provided with a clearance groove (21) to accommodate the second door (4), and guide grooves (22) are provided on both sides of the clearance groove (21).

5. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 4, characterized in that: The second box door (4) is provided with a guide block (41) and is slidably disposed in the guide groove (22). The second box door (4) is provided with a first extension (42) on both sides and close to the inner wall surface of the first box body (1) and the second box body (3).

6. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 5, characterized in that: The fixing groove (6) is provided on the inner wall surface of the first box (1), and the fixing groove (6) maintains a distance from the side wall surfaces of the first box (1) and the second box (3) to allow the first extension (42) to pass.

7. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 2, characterized in that: The end face of the second housing (3) is provided with a second extension (31) and is slidably disposed in the cavity (12). The second extension (31) is provided with a positioning hole (32). The fastener (5) is threadedly connected to the positioning hole (32). The fastener (5) is configured as a fastening screw.

8. The low-voltage grid-connected box for distributed photovoltaic power stations according to claim 1, characterized in that: The partition (7) has at least one spring piece (71) on both sides, which acts on the end face of the fixing groove (6). The spring piece (71) has a connecting part (72) on both sides, which is embedded in the side walls of the partition (7). The partition (7) has at least one gripping groove (73).

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