A photovoltaic grid-connected low-voltage switchgear

Abstract

This utility model relates to the field of solar power generation system application equipment, and discloses a photovoltaic grid-connected low-voltage switchgear. It mainly consists of a top cover, lifting lugs, rear door, front door, side panels, bottom plate, columns, crossbeams, upper inner door, middle inner door, lower inner door, mounting plate I, partition I, mounting plate II, mounting plate III, partition II, mounting plate IV, mounting plate V, outer cabinet crossbeam, outer cabinet top beam, pneumatic spring support rod, outer cabinet assembly, and inner cabinet assembly. The beneficial effects of this utility model are: it divides the photovoltaic grid-connected switchgear into inner cabinet assembly and outer cabinet assembly; partitions and mounting plates are set in the inner cabinet assembly, dividing the switchgear into independent compartments for installing various functional components to efficiently utilize space; the outer cabinet assembly not only features four doors for flexible and convenient maintenance, but the stainless steel welding of the cabinet body further meets the protection safety level requirements of switchgear under various outdoor working conditions. This solves the problems of inconvenient maintenance and low protection level of existing photovoltaic grid-connected low-voltage switchgear.

Description

Technical Field

[0001] This utility model relates to the field of solar power generation system application equipment, specifically a photovoltaic grid-connected low-voltage switchgear. Background Technology

[0002] Solar power generation, as a clean energy source, is being developed and utilized more and more widely. Photovoltaic grid-connected cabinets are an important component of solar power generation systems. They are used for grid connection of electricity in solar power systems and possess practical functions such as power monitoring and detection, and induced current limiting. They are an indispensable part of solar power generation systems. The photovoltaic grid-connected low-voltage cabinet is a key device in the automatic control system and is crucial for the stable operation of the photovoltaic power generation system.

[0003] Existing photovoltaic grid-connected low-voltage switchgear typically consists of a cabinet and doors, with various functional components mounted on the back panel of the cabinet. However, during operation, these switchgear require regular maintenance and repair of their internal components. Because the internal space of the cabinet limits the ease of maintenance and repair after installation, ensuring the quality of maintenance is difficult. Furthermore, existing photovoltaic grid-connected switchgear cabinets are mostly made of ordinary steel plates coated with outdoor paint. When exposed to harsh outdoor environments for extended periods, corrosion and other factors can easily cause equipment failures, affecting the reliable operation of the power system.

[0004] Therefore, based on the above problems, this utility model provides a photovoltaic grid-connected low-voltage switchgear to solve the aforementioned problems existing in the use of the prior art. Utility Model Content

[0005] To address the aforementioned shortcomings in the existing technology, this utility model provides a photovoltaic grid-connected low-voltage switchgear.

[0006] This utility model is achieved using the following technical solution: A photovoltaic grid-connected low-voltage switchgear includes an outer cabinet assembly and an inner cabinet assembly. The outer cabinet assembly consists of a top cover, lifting lugs, a rear door, a front door, side panels, a bottom plate, and pneumatic spring struts. The inner cabinet assembly consists of columns, crossbeams, an upper inner door, a middle inner door, a lower inner door, mounting plate I, partition I, mounting plate II, mounting plate III, partition II, mounting plate IV, mounting plate V, an outer cabinet crossbeam, and an outer cabinet top beam. The outer cabinet assembly is equipped with two front doors and two rear doors; The inner cabinet assembly includes mounting plate I, partition I, mounting plate II, mounting plate III, partition II, mounting plate IV, and mounting plate V, which divide the switch cabinet into independent compartments.

[0007] Furthermore, the front door, rear door, and outer cabinet crossbeam are connected by pneumatic spring struts, which can be opened to a large angle and have a windproof locking function for personnel maintenance.

[0008] Furthermore, the top cover is sloped to prevent rainwater from accumulating on top.

[0009] Furthermore, both the upper inner door and the middle inner door are equipped with rectangular viewing windows for monitoring the operating status of components inside the cabinet.

[0010] Furthermore, the outer cabinet side panels, outer cabinet crossbeams, outer cabinet top beams, and bottom plates are combined to form an outer cabinet frame, the inner cabinet components are installed into the outer cabinet frame, and the top cover is installed on the top of the outer cabinet frame.

[0011] Furthermore, four lifting lugs are welded onto the top cover.

[0012] Furthermore, the inner cabinet frame is formed by bolting four columns and crossbeams. Partition I, partition II, and mounting plate V are connected to each crossbeam. Mounting plate I is installed on partition I, mounting plates II and III are installed on partition II, and mounting plate IV is installed on mounting plate V. The upper inner door, middle inner door, and lower inner door are installed on the columns.

[0013] Compared with the prior art, the technical advantages of this utility model are: compact and reasonable design structure, high space utilization, convenient maintenance and repair, and high safety protection level. Attached Figure Description

[0014] Figure 1 This is an external view of the switch cabinet of this utility model.

[0015] Figure 2 This is a schematic diagram of the installation of the switch cabinet of this utility model.

[0016] Figure 3 This is a schematic diagram of the inner cabinet component of this utility model.

[0017] Figure 4 This is a schematic diagram of the outer cabinet component of this utility model.

[0018] Figure 5 This is a schematic diagram of the functional compartments of the switch cabinet of this utility model.

[0019] Attached reference numerals: 1-Top cover, 2-Lifting lug, 3-Rear door, 4-Front door, 5-Side panel, 6-Bottom plate, 7-Column, 8-Beam, 9-Upper inner door, 10-Middle inner door, 11-Lower inner door, 12-Mounting plate I, 13-Partition I, 14-Mounting plate II, 15-Mounting plate III, 16-Partition II, 17-Mounting plate IV, 18-Mounting plate V, 19-Outer cabinet beam, 20-Outer cabinet top beam, 21-Pneumatic spring strut, 22-Outer cabinet assembly, 23-Inner cabinet assembly. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0022] This utility model discloses a photovoltaic grid-connected low-voltage switchgear. The design has a compact and reasonable structure, high space utilization, convenient maintenance and repair, and a high level of safety protection.

[0023] This photovoltaic grid-connected low-voltage switchgear consists of an outer cabinet assembly 22 and an inner cabinet assembly 23. The outer cabinet assembly 22 consists of a top cover 1, lifting lugs 2, a rear door 3, a front door 4, side panels 5, a bottom plate 6, and pneumatic spring support rods 21. The inner cabinet assembly 23 consists of columns 7, crossbeams 8, upper inner door 9, middle inner door 10, lower inner door 11, mounting plate I 12, partition I 13, mounting plate II 14, mounting plate III 15, partition II 16, mounting plate IV 17, mounting plate V 18, outer cabinet crossbeam 19, and outer cabinet top beam 20.

[0024] like Figure 2 Figure 3 As shown, the inner cabinet assembly 23 consists of four uprights 7 and crossbeams 8 bolted together to form a frame assembly. Then, partitions I 13, II 16, and mounting plate V 18 are connected to each crossbeam 8. Mounting plate I 12 is then installed on partition I 13, mounting plates II 14 and III 15 are installed on partition II 16, and mounting plate IV 17 is installed on mounting plate V 18, thus dividing the inner cabinet of the switchgear into independent component compartments, such as... Figure 5 As shown, the cabinet includes a disconnector compartment, a measuring transformer compartment, a metering and protection compartment, a circuit breaker compartment, a busbar compartment, and a cable entry / exit compartment, used to install various functional components. Then, the upper inner door 9, middle inner door 10, and lower inner door 11 are installed on the column 7, thus completing the installation of the inner cabinet assembly 23. Both the upper inner door 9 and the middle inner door 10 are equipped with rectangular viewing windows for easy monitoring of equipment data. The cabinet has three doors—upper inner door 9, middle inner door 10, and lower inner door 11—allowing for only the compartments containing the relevant components to be opened during maintenance, improving work efficiency.

[0025] like Figure 2 Figure 4As shown, the outer cabinet assembly 22 consists of a top cover 1, lifting lugs 2, a rear door 3, a front door 4, side panels 5, a bottom plate 6, an outer cabinet crossbeam 19, an outer cabinet top beam 20, and pneumatic spring support rods 21. First, assemble the outer cabinet side panel 5 with the outer cabinet crossbeam 19, outer cabinet top beam 20, and bottom plate 6 into a frame, and then weld them securely along the entire edge. Next, install the inner cabinet assembly 23 into the outer cabinet frame, determine its position, and securely connect it with bolts. Then, install the top cover 1 onto the top of the outer cabinet assembly 22 and weld it securely along the entire edge. Finally, weld four lifting lugs 2 onto the top cover 1 (e.g., ...). Figure 1 Install two front doors 4 at the front end of the outer cabinet assembly 22 and two rear doors 3 at the rear end of the outer cabinet assembly 22. Then, install one end of the pneumatic spring strut 21 on the door frame of the front door 4 and the other end on the crossbeam 19 of the outer cabinet to ensure that the front door 4 and the rear door 3 can open at a large angle, thus completing the installation.

[0026] The above structure makes reasonable use of space, facilitates monitoring, inspection and maintenance, and provides a high level of safety protection.

[0027] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A photovoltaic grid-connected low-voltage switchgear, characterized in that: The system includes an outer cabinet assembly (22) and an inner cabinet assembly (23). The outer cabinet assembly (22) consists of a top cover (1), a lifting lug (2), a rear door (3), a front door (4), a side panel (5), a bottom plate (6), and a pneumatic spring support rod (21). The inner cabinet assembly (23) consists of a column (7), a crossbeam (8), an upper inner door (9), a middle inner door (10), a lower inner door (11), mounting plate I (12), partition I (13), mounting plate II (14), mounting plate III (15), and partition II (16). The cabinet is composed of mounting plate IV (17), mounting plate V (18), outer cabinet crossbeam (19) and outer cabinet top beam (20); the outer cabinet assembly (22) is provided with two front doors (4) and two rear doors (3); the inner cabinet assembly (23) is provided with mounting plate I (12), partition I (13), mounting plate II (14), mounting plate III (15), partition II (16), mounting plate IV (17) and mounting plate V (18), which divide the switch cabinet into independent compartments.

2. The photovoltaic grid-connected low-voltage switchgear according to claim 1, characterized in that, The front door (4), the rear door (3) and the outer cabinet beam (19) are connected by a pneumatic spring strut (21).

3. A photovoltaic grid-connected low-voltage switchgear according to claim 1, characterized in that, The top cover (1) is provided with a slope to prevent rainwater from accumulating on top.

4. A photovoltaic grid-connected low-voltage switchgear according to claim 1, characterized in that, Both the upper inner door (9) and the middle inner door (10) are equipped with rectangular windows for monitoring the operating status of components inside the cabinet.

5. A photovoltaic grid-connected low-voltage switchgear according to claim 1, characterized in that, The side panel (5) is combined with the outer cabinet crossbeam (19), the outer cabinet top beam (20), and the bottom plate (6) to form the outer cabinet frame. The inner cabinet component (23) is installed into the outer cabinet frame, and the top cover (1) is installed on the top of the outer cabinet frame.

6. A photovoltaic grid-connected low-voltage switchgear according to claim 1, characterized in that, Four lifting lugs (2) are welded onto the top cover (1).

7. A photovoltaic grid-connected low-voltage switchgear according to claim 1, characterized in that, The inner cabinet frame is formed by bolting together four columns (7) and crossbeams (8). Partition I (13), partition II (16), and mounting plate V (18) are connected to each crossbeam (8). Mounting plate I (12) is installed on partition I (13), mounting plate II (14) and mounting plate III (15) are installed on partition II (16), mounting plate IV (17) is installed on mounting plate V (18), and the upper inner door (9), middle inner door (10), and lower inner door (11) are installed on the columns (7).

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