Modular distribution box for low voltage power distribution

Abstract

The application provides a modular power distribution box for low-voltage power distribution, and relates to the technical field of power distribution boxes.The modular power distribution box comprises a main cabinet body and a frame, an expansion slot is formed in the middle of the frame, two mounting slots are formed on the outer side of the frame, a sub-cabinet assembly for increasing the expansion space is mounted on the outer side of the frame, a plurality of fixing rods are fixedly connected in the inner cavity of the expansion slot, a sealing assembly for adjusting the closure of the expansion slot is arranged between every two adjacent fixing rods, and a first sealing slot is formed in the upper and lower ends of the fixing rod; the sub-cabinet assembly comprises an expansion cabinet body arranged on the outer side of the main cabinet body; by arranging the sub-cabinet assembly, the transverse expansion operation of the power distribution box is realized without damaging the original layout and structure in the power distribution box, the installation space between the modules is prevented from being too compact due to the addition of the inner cavity of the main cabinet body, the heat dissipation effect of the power distribution box is prevented from being affected, and the connection cables are prevented from being randomly distributed by the wire arranging frame and the threading slot, so that the disorder in the power distribution box is avoided.

Description

Technical Field

[0001] This invention relates to the field of distribution box technology, and more particularly to a modular distribution box for low-voltage power distribution. Background Technology

[0002] Modular distribution boxes are power distribution equipment constructed using standardized, interchangeable functional units (modules). They support flexible combination, rapid expansion, convenient maintenance, and intelligent management. Based on a "building block" design concept, components such as circuit breakers, power modules, surge protectors, and monitoring units are designed as independent modules. Each module can be installed, replaced, or upgraded independently. They are installed in a unified enclosure using rails, connectors, or bolts to achieve efficient power distribution and control. Users can select the type and quantity of modules according to their actual needs and quickly assemble them into a complete power distribution system through standardized interfaces. They are widely used in power management systems that require high reliability and flexibility.

[0003] However, traditional distribution boxes typically use a fixed structure, with the number of circuits and capacity configuration predetermined at the factory. When the power demand of the distribution box changes, the space reserved inside the traditional distribution box is insufficient, which leads to the need for rearrangement or replacement of the cabinet for later expansion. Moreover, since the installation position is fixed, once the internal layout needs to be changed, it is necessary to frequently disassemble and reassemble the original modules or carry out destructive modifications. At the same time, the added functional modules for expansion will make the installation space inside the distribution box too compact, affecting the heat dissipation of the cabinet cavity. Summary of the Invention

[0004] The problem that this invention aims to solve is that traditional fixed-structure distribution boxes require rearrangement or cabinet replacement when expanding their capacity. At the same time, the added functional modules during expansion can lead to an overly compact installation space within the distribution box.

[0005] To address the aforementioned technical problems, this invention provides a modular distribution box for low-voltage power distribution, comprising a main cabinet, frames at both ends of the main cabinet, an expansion slot in the middle of the frame, two mounting slots on the outer side of the frame, and a secondary cabinet assembly for increasing expansion space mounted on the outer side of the frame. Several fixing rods are fixedly connected to the inner cavity of the expansion slot, and a sealing assembly for adjusting the closure of the expansion slot is provided between every two adjacent fixing rods. A first sealing slot is provided at both the upper and lower ends of each fixing rod. The auxiliary cabinet assembly includes an extension cabinet located outside the main cabinet. The extension cabinet has an opening at one end near the main cabinet. First connecting plates are fixedly connected to both sides of the extension cabinet at the end near the main cabinet. The position of the opening corresponds to the position of the extension slot and they are connected.

[0006] Preferably, the inner cavity of the expansion cabinet is connected to the inner cavity of the expansion cabinet through an opening and an expansion slot, and a device mounting bracket for installing the expansion module is fixedly installed in the inner cavity of the expansion cabinet.

[0007] Preferably, the first connecting plate has a first connecting groove in the middle, and the inner wall of the mounting groove has a plurality of first mounting holes. The first connecting plate is movably connected to the mounting groove, and the positions of the first mounting holes are corresponding to and connected to the positions of the first connecting groove.

[0008] Preferably, the sealing assembly includes a sealing plate movably connected to the inner cavity of the expansion groove, and both the upper and lower ends of the sealing plate are movably connected to the inner cavity of the adjacent first sealing groove.

[0009] Preferably, the front of the frame is provided with a plurality of second connecting grooves and second mounting holes, one end of the sealing plate passes through the second connecting groove and is connected to a second connecting plate, and a limit groove is provided at the end of the second connecting plate near the sealing plate.

[0010] Preferably, the second connecting plate has two third mounting holes, the positions of which correspond to and are connected to the positions of the second mounting holes.

[0011] Preferably, the inner wall of the frame is provided with a second sealing groove, and the end of the sealing plate away from the second connecting plate is connected to the second sealing groove.

[0012] Preferably, a mounting bracket is fixedly installed on the back of the inner cavity of the main cabinet. The mounting bracket has several through holes for connecting the connectors, and a mounting plate is connected to the mounting bracket via the connectors.

[0013] Preferably, a modular mounting rack is provided on one side of the inner cavity of the main cabinet, and a cable management rack for fixing the connecting cables is fixedly connected to the inner wall of the modular mounting rack, and the cable management rack is provided with a cable threading groove.

[0014] The technical effects and advantages of this invention are as follows: This invention, by incorporating a secondary cabinet component, enables lateral expansion of the distribution box without disrupting its original layout and structure. The added functional modules or equipment are installed on a mounting rack, while connecting cables enter the main cabinet's interior through openings and expansion slots, connecting to the busbar system or corresponding modules within the main cabinet. This allows for expansion without rearranging existing modules or wiring, or replacing the cabinet itself, avoiding frequent disassembly of the internal structure during layout changes. The device can adapt to dynamic adjustments within the distribution box. Furthermore, installing the necessary expansion modules in a separate expansion cabinet avoids overcrowding the main cabinet, which would otherwise compromise heat dissipation.

[0015] This invention adjusts the installation position of the expansion cabinet by providing mounting slots and connecting plates. The number of auxiliary cabinet components can be selected according to the expansion requirements of the distribution box. Auxiliary cabinet components can be installed on both sides of the main cabinet. Connecting bolts and other connectors pass through the first connecting slot and the first mounting hole to fix the expansion cabinet at a suitable height, thus enabling the installation operation of the expansion cabinet. This ensures the stability and accuracy of the expansion module connection, avoiding inaccurate connection due to excessive distance difference between the fixed module and the expansion module. Simultaneously, the connecting cables used by the expansion modules installed in the internal cavity of the expansion cabinet exit through the opening, pass through the expansion slot, and then through the inner cavity of the cable tray before connecting to the fixed modules on the mounting plate and modular mounting bracket. This effectively avoids random distribution of connecting cables, preventing chaos within the distribution box and ensuring that the complex internal wiring during distribution box maintenance prevents the inability to distinguish between the inherent functional modules and the expansion functional modules.

[0016] This invention utilizes sealing plates to facilitate the opening and closing of the expansion slot. After installation, the expansion cabinet needs to connect with the inner cavity of the main cabinet. Based on the actual installation position of the expansion cabinet, the sealing plate corresponding to the opening is removed to achieve communication between the inner cavity of the expansion cabinet and the inner cavity of the main cabinet. Sealing plates in other positions are fixed within the expansion slot to seal the main cabinet, avoiding unnecessary openings on the main cabinet and further improving the overall protection of the distribution box. Furthermore, the first and second sealing grooves ensure a tight connection between the sealing plate and the inner wall of the expansion slot, effectively preventing external dust and other impurities from entering the main cabinet through gaps. Additionally, the side structure formed by the frame and several sealing components allows for easy access from the side when a fault occurs in a certain part, as the corresponding sealing plate can be removed based on the location of the fault. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2This is a schematic diagram of the overall internal structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the auxiliary cabinet component structure of the present invention.

[0020] Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0021] Figure 5 This is a schematic diagram of the overall structure of the present invention from another perspective.

[0022] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B.

[0023] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point C.

[0024] The attached diagram is labeled as follows: 1. Main cabinet; 2. Frame; 3. Expansion slot; 4. Mounting slot; 5. Sub-cabinet assembly; 51. Expansion cabinet; 52. First connecting plate; 53. Equipment mounting bracket; 54. First connecting slot; 6. Fixing rod; 7. Sealing assembly; 71. Sealing plate; 72. Second connecting plate; 73. Limiting slot; 74. Third mounting hole; 8. First sealing slot; 9. First mounting hole; 10. Second connecting slot; 11. Second mounting hole; 12. Second sealing slot; 13. Fixed mounting bracket; 14. Mounting plate; 15. Modular mounting bracket; 16. Cable management bracket; 17. Cable routing channel. Detailed Implementation

[0025] This invention provides a modular distribution box for low-voltage power distribution, such as... Figure 1 - Figure 7 As shown, the system includes a main cabinet 1, with frames 2 at both ends. An expansion slot 3 is provided in the middle of the frame 2, and two mounting slots 4 are provided on the outer side of the frame 2. A secondary cabinet assembly 5 for increasing the expansion space is installed on the outer side of the frame 2. Several fixing rods 6 are fixedly connected to the inner cavity of the expansion slot 3. A sealing assembly 7 for adjusting the closure of the expansion slot 3 is provided between every two adjacent fixing rods 6. First sealing slots 8 are provided at both the upper and lower ends of the fixing rods 6. The inner cavity of the expansion slot 3 is divided into several equally divided spaces by the fixing rods 6. The opening and closing of each space is controlled by the corresponding sealing assembly 7. The number of secondary cabinet assemblies 5 can be selected according to the expansion requirements of the distribution box. Secondary cabinet assemblies 5 can be added to both sides of the main cabinet 1. The horizontal expansion operation of the distribution box can be realized without destroying the original configuration and layout of the distribution box, and the downtime of the distribution box during the expansion process can also be effectively reduced.

[0026] Furthermore, such as Figure 1 , Figure 2 and Figure 3 As shown, the auxiliary cabinet component 5 includes an extension cabinet 51 located outside the main cabinet 1. The extension cabinet 51 has an opening at one end near the main cabinet 1. First connecting plates 52 are fixedly connected to both sides of the extension cabinet 51 near the main cabinet 1. The position of the opening corresponds to the position of the expansion slot 3 and is connected. When the power demand of the distribution box changes and additional configuration or capacity needs to be added, the extension cabinet 51 is added, and the extension cabinet 51 is installed on the main cabinet 1 through the first connecting plates 52, so that the extension cabinet 51 and the main cabinet 1 form a stable connection, and ensure the precise docking of the opening and the expansion slot 3.

[0027] Furthermore, such as Figure 2 , Figure 3 and Figure 4 As shown, the inner cavity of the expansion cabinet 51 is connected to the inner cavity of the main cabinet 1 through the opening and the expansion slot 3. The inner cavity of the expansion cabinet 51 is fixedly installed with a device mounting bracket 53 for installing expansion modules. The expansion modules or equipment are installed on the device mounting bracket 53. The modules in the distribution box usually need to be connected to the busbar system. The connection cables required by the expansion modules added in the expansion cabinet 51 enter the inner cavity of the main cabinet 1 through the opening and the expansion slot 3, and are connected to the busbar system or the corresponding inherent modules in the inner cavity of the main cabinet 1. This allows the distribution box to be expanded without rearranging the already installed modules or wiring, or without replacing the cabinet. This avoids frequent disassembly of the internal structure during the layout process, and allows the device to adapt to the dynamic adjustment needs of the distribution box.

[0028] Furthermore, such as Figure 3 and Figure 5 As shown, a first connecting groove 54 is provided in the middle of the first connecting plate 52, and a plurality of first mounting holes 9 are provided on the inner wall of the mounting groove 4. The first connecting plate 52 is positioned and movably connected to the mounting groove 4, and the positions of the first mounting holes 9 are corresponding to and connected to the positions of the first connecting groove 54. According to the expansion requirements of the distribution box, the expansion cabinet 51 is adjusted to a suitable height position. Then, connecting bolts and other connecting parts are used to pass through the first connecting groove 54 and the first mounting holes 9, so that the first connecting plate 52 is fixed in the inner cavity of the mounting groove 4, so as to realize the installation operation of the expansion cabinet 51. The design of the mounting groove 4 and the first mounting holes 9 allows the expansion cabinet 51 to be installed in different positions according to the dynamic adjustment requirements, ensuring the stability and accuracy of the expansion module connection, avoiding the distance difference between the fixed module and the expansion module being too large, which would prevent accurate connection. At the same time, the module components required for expansion are installed in a separate expansion cabinet 51, avoiding direct installation in the inner cavity of the main cabinet 1, which would result in the installation space between the modules being too compact. The integration of high-density components would easily lead to excessive temperature rise, affecting the equipment life and operational stability.

[0029] Furthermore, such as Figure 2 and Figure 5 As shown, the sealing assembly 7 includes a sealing plate 71 movably connected to the inner cavity of the expansion slot 3. Both the upper and lower ends of the sealing plate 71 are movably connected to the inner cavity of the adjacent first sealing slot 8. The first sealing slot 8 increases the tightness of the connection between the sealing plate 71 and the fixing rod 6, thereby achieving the sealing treatment of the expansion slot 3. According to the installation position of the expansion cabinet 51, the sealing plate 71 corresponding to the opening position is removed to ensure the communication between the inner cavity of the expansion cabinet 51 and the inner cavity of the main cabinet 1. The sealing plate 71 can also be controlled according to the actual installation position of the expansion cabinet 51, avoiding unnecessary openings on the main cabinet 1 and further improving the overall protection performance of the distribution box.

[0030] Furthermore, such as Figure 5 and Figure 6 As shown, the front of the frame 2 has several second connecting grooves 10 and second mounting holes 11. One end of the sealing plate 71 passes through the second connecting groove 10 and is connected to the second connecting plate 72. The end of the second connecting plate 72 near the sealing plate 71 has a limiting groove 73. When the sealing plate 71 passes through the second connecting groove 10 and is inserted into the inner cavity of the expansion groove 3 through the first sealing groove 8, the second connecting plate 72 is fixed to the end of the sealing plate 71 near the second connecting groove 10 through the limiting groove 73. The limiting groove 73 realizes the quick positioning and connection of the second connecting plate 72.

[0031] Furthermore, such as Figure 5 and Figure 6 As shown, the second connecting plate 72 has two third mounting holes 74. The positions of the third mounting holes 74 correspond to and are connected to the positions of the second mounting holes 11. After the second connecting plate 72 is fixed together with the sealing plate 71, bolts and other connecting parts are used to pass through the inner cavities of the second mounting holes 11 and the third mounting holes 74, so that the second connecting plate 72 is fixed on the frame 2. At the same time, the design of the limiting groove 73 enables the second mounting holes 11 and the third mounting holes 74 to be accurately and quickly aligned. The second connecting plate 72 reinforces the position of the sealing plate 71, ensuring the stability and sealing effect of the sealing plate 71 in the inner cavity of the expansion groove 3.

[0032] Furthermore, such as Figure 5 and Figure 7As shown, the inner wall of the frame 2 is provided with a second sealing groove 12. The end of the sealing plate 71 away from the second connecting plate 72 is connected to the second sealing groove 12. The first sealing groove 8 and the second sealing groove 12 ensure the tightness of the connection between the sealing plate 71 and the inner wall of the expansion groove 3, effectively preventing external dust and other impurities from entering the inner cavity of the main cabinet 1 through the gap between the sealing plate 71 and the expansion groove 3. At the same time, the frame 2 and the sealing component 7 form the side structure of the main cabinet 1, and the sealing component 7 divides the side of the main cabinet 1 into multiple modules, which facilitates the subsequent disassembly and maintenance of the distribution box. When a certain part fails, the sealing plate 71 at the corresponding position can be removed according to the location of the failure, making it easier for the staff to operate from a closer position on the side.

[0033] Furthermore, such as Figure 2 As shown, a mounting bracket 13 is fixedly installed on the back of the inner cavity of the main cabinet 1. The mounting bracket 13 has several through holes for connecting parts. A mounting plate 14 is connected to the mounting bracket 13 through the connecting parts. After the configuration modules required by the distribution box are installed on the mounting plate 14, they are then installed in the inner cavity of the main cabinet 1 through the mounting bracket 13, so that each component forms an independent modular unit, realizing flexible combination or allocation, etc. The added functional modules are installed on the equipment mounting bracket 53, avoiding the difference between the installation method of the added modules and the original installation method of the internal structure of the distribution box due to changes in industry standards, effectively improving the adaptability and flexible adjustment of the distribution box.

[0034] Furthermore, such as Figure 2 As shown, a modular mounting bracket 15 is provided on one side of the inner cavity of the main cabinet 1. A cable management rack 16 for fixing the connecting cables is fixedly connected to the inner wall of the modular mounting bracket 15. A cable management rack 16 is provided with a cable passage 17. The fixed modules in the original distribution box are installed on the mounting plate 14 and the modular mounting bracket 15. The connecting cables used by the expansion modules installed in the inner cavity of the expansion cabinet 51 come out from the opening, pass through the expansion slot 3, pass through the inner cavity of the cable passage 17, and then connect to the original fixed modules on the mounting plate 14 and the modular mounting bracket 15. This effectively avoids the random distribution of connecting cables, which would cause chaos in the distribution box. It also prevents the internal wiring from being too complex to distinguish the connecting cables of the original functional modules and the expansion functional modules when the distribution box is being repaired.

[0035] The working principle of this invention is as follows: First, the fixed configuration and wiring in the original distribution box are fixedly installed on the mounting plate 14 and the modular mounting frame 15. The modular mounting frame 15 makes each component an independent module. When the power demand of the distribution box changes and additional configuration or capacity needs to be added, an expansion cabinet 51 is added, and the additional functional modules are installed on the equipment mounting frame 53, so that the expansion modules are fixed in the cavity of the expansion cabinet 51. The module components required for expansion are installed in a separate expansion cabinet 51, avoiding direct installation in the cavity of the main cabinet 1, which would result in overly compact installation space between modules. High-density component integration can easily lead to excessive temperature rise, affecting equipment life and operational stability. After installation, the first connecting plate 51 is used to connect the modules. 2. The expansion cabinet 51 is installed on the main cabinet 1 via the mounting slot 4, forming a stable connection between the expansion cabinet 51 and the main cabinet 1, and ensuring precise alignment of the opening with the expansion slot 3. Based on the expansion requirements of the distribution box, the expansion cabinet 51 is adjusted to a suitable height. Then, connecting bolts and other connectors are used to pass through the first connecting slot 54 and the first mounting hole 9 to fix the first connecting plate 52 into the inner cavity of the mounting slot 4, thus realizing the installation operation of the expansion cabinet 51. The design of the mounting slot 4 and the first mounting hole 9 allows the expansion cabinet 51 to be installed in different positions according to dynamic adjustment needs, ensuring the stability and accuracy of the expansion module connection and avoiding excessive distance differences between the fixed module and the expansion module, which could prevent accurate connection. The installation of the expansion cabinet 51 is now complete. Next, remove the sealing plate 71 corresponding to the opening to ensure communication between the inner cavity of the expansion cabinet 51 and the inner cavity of the main cabinet 1. Then, insert the connection cables required by the expansion module installed on the equipment mounting bracket 53 into the inner cavity of the main cabinet 1 through the opening and expansion slot 3, and connect them to the busbar system or corresponding inherent modules in the inner cavity of the main cabinet 1. This allows the distribution box to be expanded without rearranging the already installed modules or wiring, or replacing the cabinet, avoiding frequent disassembly of the internal structure during layout changes. This enables the device to adapt to the dynamic adjustment needs of the distribution box. Simultaneously, after the expansion module's connection cables enter the inner cavity of the main cabinet 1, they need to pass through the cable tray 17 and be organized by the cable management rack 16 to effectively avoid... This design avoids the mess caused by haphazardly distributed connecting cables within the distribution box and prevents confusion between the cables of the original functional modules and the expansion functional modules during fault repairs. Specifically, the side of the main cabinet 1 where the expansion cabinet 51 is not installed is sealed with a sealing plate 71. The sealing plate 71 is controlled according to the actual installation position of the expansion cabinet 51, avoiding unnecessary openings on the main cabinet 1 and further improving the overall protective performance of the distribution box. The side structure of the main cabinet 1 is formed by the frame 2 and several sealing components 7, facilitating subsequent disassembly and maintenance of the distribution box. If a fault occurs in a certain part, the corresponding sealing plate 71 can be removed based on the location of the fault, allowing staff to operate from a closer position on the side.

[0036] It is understood that the present invention has been described through some embodiments, which are known to those skilled in the art. Various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A modular distribution box for low-voltage power distribution, comprising a main cabinet (1), characterized in that: The main cabinet (1) is provided with frames (2) at both ends. An expansion slot (3) is provided in the middle of the frame (2). Two mounting slots (4) are provided on the outer side of the frame (2). A secondary cabinet component (5) for increasing the expansion space is installed on the outer side of the frame (2). Several fixing rods (6) are fixedly connected to the inner cavity of the expansion slot (3). A sealing component (7) for adjusting the closure of the expansion slot (3) is provided between every two adjacent fixing rods (6). A first sealing slot (8) is provided at both the upper and lower ends of the fixing rod (6). The auxiliary cabinet assembly (5) includes an extension cabinet (51) located outside the main cabinet (1). The extension cabinet (51) has an opening at one end near the main cabinet (1). The two sides of the extension cabinet (51) near the main cabinet (1) are fixedly connected to a first connecting plate (52). The position of the opening corresponds to the position of the extension slot (3) and is connected to it.

2. A modular distribution box for low-voltage power distribution according to claim 1, characterized in that: The inner cavity of the expansion cabinet (51) is connected to the inner cavity of the expansion cabinet (51) through an opening and an expansion slot (3). The inner cavity of the expansion cabinet (51) is fixedly equipped with a device mounting bracket (53) for installing the expansion module.

3. A modular distribution box for low-voltage power distribution according to claim 1, characterized in that: The first connecting plate (52) has a first connecting groove (54) in the middle, and the inner wall of the mounting groove (4) has a plurality of first mounting holes (9). The first connecting plate (52) and the mounting groove (4) are in corresponding positions and are movably connected. The positions of the first mounting holes (9) and the first connecting groove (54) are in corresponding positions and are connected.

4. A modular distribution box for low-voltage power distribution according to claim 1, characterized in that: The sealing assembly (7) includes a sealing plate (71) movably connected to the inner cavity of the expansion groove (3), and both the upper and lower ends of the sealing plate (71) are movably connected to the inner cavity of the adjacent first sealing groove (8).

5. A modular distribution box for low-voltage power distribution according to claim 4, characterized in that: The frame (2) has several second connecting grooves (10) and second mounting holes (11) on its front side. One end of the sealing plate (71) passes through the second connecting groove (10) and is connected to a second connecting plate (72). The second connecting plate (72) has a limit groove (73) at one end near the sealing plate (71).

6. A modular distribution box for low-voltage power distribution according to claim 5, characterized in that: The second connecting plate (72) has two third mounting holes (74), the positions of the third mounting holes (74) correspond to the positions of the second mounting holes (11) and are connected.

7. A modular distribution box for low-voltage power distribution according to claim 5, characterized in that: The inner wall of the frame (2) is provided with a second sealing groove (12), and the end of the sealing plate (71) away from the second connecting plate (72) is connected to the second sealing groove (12).

8. A modular distribution box for low-voltage power distribution according to claim 1, characterized in that: A mounting bracket (13) is fixedly installed on the back of the inner cavity of the main cabinet (1). The mounting bracket (13) has several through holes for connecting the connectors. A mounting plate (14) is connected to the mounting bracket (13) through the connectors.

9. A modular distribution box for low-voltage power distribution according to claim 1, characterized in that: A modular mounting bracket (15) is provided on one side of the inner cavity of the main cabinet (1). A cable management rack (16) for fixing and connecting cables is fixedly connected to the inner wall of the modular mounting bracket (15). A cable management rack (16) is provided on the cable routing rack (17).

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