A modular, rapid-assembly low-voltage switchgear

Abstract

This utility model discloses a modular, rapid-assembly low-voltage switchgear, comprising a cabinet frame, modular unit components, electrical connection interfaces, and a protective shell. The cabinet frame is composed of horizontal and vertical beams joined together by slot-type connectors, with elastic latches and positioning holes for fastening. The modular unit components are connected to the cabinet frame via a slide rail mechanism, which consists of T-shaped guide rails and ball-bearing sliders. The electrical connection interfaces include a top pin group and a bottom socket group, which are automatically aligned and connected via spring-loaded guide columns. The protective shell is composed of multiple detachable panels, with sealing strips on the edges of the panels and fixed by magnetic attraction devices. This application can significantly shorten on-site assembly time, improve installation and disassembly efficiency, enhance electrical connection reliability, adapt to complex environmental conditions, and possess good mechanical strength and thermal insulation performance.

Description

Technical Field

[0001] This utility model relates to the technical field of low-voltage power distribution equipment, and in particular to a modular, rapid-assembly low-voltage switchgear. Background Technology

[0002] With the continuous development of the low-voltage power distribution equipment field, various low-voltage switchgear have been widely used in power systems. However, these products still have some problems in actual use. For example, low-voltage switchgear on the market usually adopts an integrated structural design, which requires a lot of on-site operation time during installation and maintenance, resulting in low construction efficiency. At the same time, the modularity of traditional low-voltage switchgear is not high, making it difficult to meet the rapid assembly needs of different application scenarios, thus limiting its flexibility and adaptability. In addition, the protection performance of existing low-voltage switchgear still needs to be improved when facing complex environmental conditions (such as high temperature, humidity, or sandstorms).

[0003] A search revealed a low-voltage switchgear with patent number CN114389167B, published on August 22, 2023. This design proposes a structure combining a quick-release housing and a sliding assembly. The cooperation of a first and second guide rod enables rapid installation and removal of the circuit breaker module, improving installation efficiency. However, this solution still has certain limitations: First, its sliding assembly is only suitable for circuit breaker modules of a specific size, resulting in poor versatility; second, the structure does not optimize the electrical connection between modules, requiring manual wiring on-site, affecting overall assembly efficiency; finally, the solution lacks a standardized interface design, preventing flexible combinations of multiple functional modules and limiting its application in diverse scenarios.

[0004] The aforementioned problems indicate that current low-voltage switchgear on the market still has significant shortcomings in terms of modular rapid assembly, particularly in terms of versatility, standardized interfaces, and on-site assembly efficiency, failing to meet the demands of modern power engineering for high efficiency, flexibility, and scalability. Therefore, this invention provides a modular rapid assembly low-voltage switchgear to overcome these deficiencies and offer a more efficient, flexible, and adaptable solution for various application scenarios. Utility Model Content

[0005] The purpose of this invention is to provide a modular, rapid-assembly low-voltage switchgear to overcome the shortcomings of existing technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A modular, rapid-assembly low-voltage switchgear includes a cabinet frame, modular unit components, electrical connection interfaces, and a protective shell. The cabinet frame is a rectangular frame structure composed of multiple horizontal and vertical beams. The horizontal and vertical beams are fixedly connected by slot-type connectors, with elastic latches on the inner side of the slot-type connectors. The elastic latches engage with positioning holes at the ends of the horizontal and vertical beams to achieve a secure fastening. The modular unit components are installed inside the cabinet frame and include circuit breaker modules, relay modules, capacitor modules, and expansion function modules. Each module is connected to the cabinet frame via a slide rail mechanism, which consists of T-shaped guide rails and ball-bearing sliders. The T-shaped guide rails run along the inner edge of the cabinet frame. The sidewalls are arranged longitudinally, with ball bearing sliders fixed to the outer sidewalls of the modular unit assembly and slidingly engaged with T-shaped guide rails. The electrical connection interfaces are located at the top and bottom of the modular unit assembly, and include pin groups and socket groups. The pin groups are fixed to the top of the modular unit assembly, and the socket groups are fixed to the bottom of the modular unit assembly. The contact surfaces of the pin groups and socket groups are coated with a conductive silver layer, and the pin groups and socket groups are automatically aligned and connected by spring-loaded guide posts. The protective shell is installed on the outside of the cabinet frame and consists of multiple detachable panels. Each panel has a sealing strip on its edge, which is embedded in the groove of the cabinet frame and fixed by a magnetic attraction device.

[0008] A further preferred embodiment: the elastic buckle of the slot-type connector is formed by bending a metal sheet, and the center of the elastic buckle is provided with a raised arc-shaped pressure block. The arc-shaped pressure block is interference-fitted with the positioning holes at the ends of the crossbeam and the vertical beam. The two ends of the elastic buckle extend outward to form an operating handle, and the outer surface of the operating handle is provided with anti-slip texture.

[0009] A further preferred embodiment: the T-shaped guide rail has guide grooves on both sides, the width of which is 10mm to 15mm; the outer side of the ball slider has a flange that matches the guide groove, the height of which is 3mm to 5mm; and the inner side of the ball slider has a ball socket to accommodate the ball, the diameter of which is 0.1mm to 0.2mm larger than the diameter of the ball.

[0010] A further preferred embodiment: the number of pins in the pin group is 8 to 16, the pins are arranged in a rectangular array, the spacing between the pins is 10mm to 20mm, the number of socket holes in the socket group corresponds to the number of pins, and the inner wall of the socket hole is provided with a gold plating layer with a thickness of 0.02mm to 0.05mm.

[0011] A further preferred embodiment: The protective shell panel adopts a double-layer structure, with an outer layer of aluminum alloy plate and an inner layer of polyurethane foam board. The thickness of the aluminum alloy plate is 1.5mm to 2mm, and the thickness of the polyurethane foam board is 10mm to 15mm. The four corners of the panel are rounded, with a radius of 5mm to 8mm.

[0012] The structural composition and implementation principle of this utility model are as follows: The cabinet frame is spliced ​​with horizontal and vertical beams into an integral frame through slot-type connectors. The elastic latches of the slot-type connectors cooperate with the positioning holes at the ends of the horizontal and vertical beams to achieve fastening and ensure the stability of the frame structure. The modular unit components are connected to the cabinet frame through a slide rail mechanism. The T-shaped guide rail of the slide rail mechanism cooperates with the ball slider to realize the sliding installation and disassembly of the modular unit components. The flange of the ball slider cooperates with the guide groove to ensure smooth sliding, and the ball in the ball socket reduces friction. The electrical connection between the modular unit components is achieved through a pin group and a socket group. The pin group and the socket group are automatically aligned and connected through a spring-loaded guide post. The guide post is compressed when the pin group is inserted into the socket group. The compressed spring pushes the pin group and the socket group to fit tightly. The conductive silver layer improves the conductivity of the contact surface. The panel of the protective shell is embedded in the groove of the cabinet frame through a sealing strip and fixed by a magnetic attraction device. The sealing strip fills the gap between the panel and the cabinet frame. The double-layer structure composed of aluminum alloy plate and polyurethane foam board improves the strength and heat insulation performance of the protective shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The cabinet frame achieves modular assembly through slot-type connectors. The connection between the horizontal and vertical beams can be completed without additional tools, significantly shortening on-site assembly time. At the same time, the elastic locking design ensures a firm and reliable connection, preventing loosening due to vibration or external force. 2. Modular unit components achieve quick installation and disassembly through a slide rail mechanism. The combination of ball-bearing sliders and T-shaped guide rails is suitable for modular unit components of various sizes, enhancing versatility. The combination of spring-loaded guide columns with pin groups and socket groups optimizes the electrical connection method and reduces the amount of manual wiring work. 3. The protective shell adopts a double-layer structure design. The combination of aluminum alloy plate and polyurethane foam board improves the mechanical strength and heat insulation performance of the protective shell. The cooperation of sealing strips and magnetic devices ensures that the protective shell has good sealing performance and can adapt to complex environmental conditions such as high temperature, humidity or sandstorms. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partially enlarged schematic diagram of the cabinet frame and the slot-type connector of this utility model;

[0017] Figure 3 This is a schematic diagram of the cooperation structure between the slide rail mechanism and the modular unit components of this utility model;

[0018] Figure 4 This is a schematic diagram showing the connection details of the pin group and socket group of the electrical connection interface of this utility model;

[0019] Figure 5 This is a schematic diagram showing the installation position and connection relationship of the sealing strip and magnetic attraction device of this utility model.

[0020] The attached figures are labeled as follows:

[0021] 1. Cabinet frame; 2. Horizontal beam; 3. Vertical beam; 4. Slotted connector; 5. Elastic latch; 6. Positioning hole; 7. Arc-shaped pressure block; 8. Operating handle; 9. Anti-slip texture; 10. Modular unit component; 11. Circuit breaker module; 12. Relay module; 13. Capacitor module; 14. Expansion function module; 15. T-shaped guide rail; 16. Ball bearing slider; 17. Guide groove; 18. Flange; 19. Ball socket; 20. Ball bearing; 21. Pin assembly; 22. Socket assembly; 23. Pin; 24. Socket hole; 25. Gold plating layer; 26. Conductive silver layer; 27. Spring-loaded guide post; 28. Protective shell; 29. ​​Panel; 30. Sealing strip; 31. Magnetic attraction device; 32. Aluminum alloy plate; 33. Polyurethane foam board; 34. Rounded corner transition; 35. Groove. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0026] Please see Figure 1 This utility model provides a modular, rapid-assembly low-voltage switchgear, including a cabinet frame 1, modular unit components 10, electrical connection interfaces, and a protective shell 28. The cabinet frame 1 is a rectangular frame structure, composed of multiple horizontal beams 2 and vertical beams 3 spliced ​​together. The horizontal beams 2 and vertical beams 3 are fixedly connected by slot-type connectors 4. The inner side of the slot-type connector 4 is provided with an elastic latch 5, which cooperates with the positioning holes 6 at the ends of the horizontal beams 2 and vertical beams 3 to achieve fastening. The modular unit components 10 are installed inside the cabinet frame 1. The modular unit components 10 include a circuit breaker module 11, a relay module 12, a capacitor module 13, and an expansion function module 14. Each module is connected to the cabinet frame 1 through a slide rail mechanism. The slide rail mechanism consists of a T-shaped guide rail 15 and a ball bearing slider 16. The T-shaped guide rail 15 is arranged longitudinally along the inner sidewall of the cabinet frame 1, and the ball bearing slider 16 is fixed to the outer sidewall of the modular unit component 10 and slides in cooperation with the T-shaped guide rail 15. Electrical connection interfaces are located at the top and bottom of the modular unit assembly 10. These interfaces include a pin group 21 and a socket group 22. The pin group 21 is fixed to the top of the modular unit assembly 10, and the socket group 22 is fixed to the bottom. The contact surfaces of the pin group 21 and the socket group 22 are coated with a conductive silver layer 26. Automatic alignment and connection between the pin group 21 and the socket group 22 are achieved through a spring-loaded guide post 27. A protective outer shell 28 is installed on the outside of the cabinet frame 1. The protective outer shell 28 consists of multiple detachable panels 29. Each panel 29 has a sealing strip 30 on its edge, which is embedded in a groove 35 of the cabinet frame 1 and fixed by a magnetic attraction device 31.

[0027] Please see Figure 2 The specific structure of the slot-type connector 4 and its connection relationship with the crossbeam 2 and the vertical beam 3 are as follows: The elastic latch 5 of the slot-type connector 4 is formed by bending a metal sheet. A raised arc-shaped pressure block 7 is provided in the middle of the elastic latch 5. The arc-shaped pressure block 7 is interference-fitted with the positioning holes 6 at the ends of the crossbeam 2 and the vertical beam 3 to ensure a firm and reliable connection. Both ends of the elastic latch 5 extend outwards to form an operating handle 8. The outer surface of the operating handle 8 is provided with anti-slip texture 9 for easy manual operation. When it is necessary to splice the crossbeam 2 and the vertical beam 3, the ends of the crossbeam 2 and the vertical beam 3 are inserted into the corresponding slots of the slot-type connector 4, respectively. By pressing the operating handle 8, the arc-shaped pressure block 7 of the elastic latch 5 is embedded into the positioning hole 6, thereby achieving a tight connection. This design allows for assembly without additional tools, significantly shortening on-site assembly time and preventing loosening due to vibration or external force.

[0028] Please see Figure 3The structure of the slide rail mechanism and its cooperation with the modular unit assembly 10 are as follows: A T-shaped guide rail 15 is arranged longitudinally along the inner wall of the cabinet frame 1. Guide grooves 17 are provided on both sides of the T-shaped guide rail 15, with a width of 10mm to 15mm. A ball bearing slider 16 is fixed to the outer wall of the modular unit assembly 10. A flange 18 matching the guide groove 17 is provided on the outer side of the ball bearing slider 16. The height of the flange 18 is 3mm to 5mm to ensure smooth sliding. A ball socket 19 for accommodating the ball 20 is provided on the inner side of the ball bearing slider 16. The diameter of the ball socket 19 is 0.1mm to 0.2mm larger than the diameter of the ball 20 to reduce friction. When it is necessary to install or disassemble the modular unit assembly 10, the ball bearing slider 16 can be quickly slid along the T-shaped guide rail 15. This design is suitable for modular unit assemblies 10 of various sizes, enhancing versatility.

[0029] Please see Figure 4 The connection details between the pin group 21 and the socket group 22 of the electrical connection interface are as follows: The pin group 21 has 8 to 16 pins 23 arranged in a rectangular array, with a spacing of 10 mm to 20 mm between the pins 23. The number of socket holes 24 in the socket group 22 corresponds to the number of pins 23. The inner wall of the socket hole 24 is provided with a gold-plated layer 25, with a thickness of 0.02 mm to 0.05 mm, to improve conductivity. The pin group 21 and the socket group 22 are automatically aligned and connected by a spring-loaded guide post 27. The guide post 27 is compressed when the pin group 21 is inserted into the socket group 22. The compressed spring pushes the pin group 21 and the socket group 22 to fit tightly together, and the conductive silver layer 26 further improves the conductivity of the contact surface. This design optimizes the electrical connection method and reduces the workload of manual wiring.

[0030] Please see Figure 1 The protective shell 28 has a double-layer panel 29, with an outer layer of aluminum alloy plate 32 and an inner layer of polyurethane foam board 33. The aluminum alloy plate 32 is 1.5mm to 2mm thick, and the polyurethane foam board 33 is 10mm to 15mm thick. The four corners of the panel 29 are rounded 34 with a radius of 5mm to 8mm. This double-layer structure improves the mechanical strength and thermal insulation performance of the protective shell 28, making it suitable for complex environmental conditions such as high temperature, humidity, or sandstorms.

[0031] Please see Figure 5 The installation position and connection relationship between the sealing strip 30 and the magnetic device 31 are as follows: The sealing strip 30 is embedded in the groove 35 of the cabinet frame 1, and the sealing strip 30 fills the gap between the panel 29 and the cabinet frame 1 to ensure good sealing. The magnetic device 31 is fixed to the inside of the panel 29 and is attracted to the metal part of the cabinet frame 1, further enhancing the fixing effect of the panel 29.

[0032] The working principle is as follows:

[0033] When assembling the low-voltage cabinet, the horizontal beam 2 and vertical beam 3 are first spliced ​​into an integral frame using slot-type connectors 4. The elastic latches 5 of the slot-type connectors 4 engage with the positioning holes 6 at the ends of the horizontal beam 2 and vertical beam 3 to achieve a tight fit, ensuring the structural stability of the cabinet frame 1. Subsequently, T-shaped guide rails 15 are arranged longitudinally along the inner sidewall of the cabinet frame 1, and ball bearing sliders 16 are fixed to the outer sidewall of the modular unit assembly 10. The modular unit assembly 10 is then slidably installed into the cabinet frame 1 via the slide rail mechanism. The electrical connection between the modular unit assemblies 10 is achieved through pin groups 21 and socket groups 22. The pin groups 21 and socket groups 22 achieve automatic alignment and connection through spring-loaded guide posts 27. The guide posts 27 are compressed when the pin groups 21 are inserted into the socket groups 22. The compressed spring pushes the pin groups 21 and socket groups 22 to fit tightly together, and the conductive silver layer 26 improves the conductivity of the contact surface. Finally, the panel 29 of the protective shell 28 is embedded into the groove 35 of the cabinet frame 1 by the sealing strip 30 and fixed by the magnetic attraction device 31 to ensure that the protective shell 28 has good sealing performance.

[0034] Practical application scenarios:

[0035] In a power distribution system renovation project at an industrial plant, a batch of low-voltage switchgear needed to be quickly assembled to meet the power supply requirements of newly added equipment. Based on the design of this utility model, the construction workers first used slot-type connectors 4 to assemble the horizontal beams 2 and vertical beams 3 into a cabinet frame 1. The entire process required no additional tools; assembly could be completed simply by manually operating the elastic locking buckles 5. Subsequently, the circuit breaker module 11, relay module 12, capacitor module 13, and expansion function module 14 were quickly installed into the cabinet frame 1 via a slide rail mechanism. The electrical connections between the modular unit components 10 were automatically aligned via pin groups 21 and socket groups 22, significantly reducing the amount of manual wiring work. Finally, the panel 29 of the protective housing 28 was fixed to the magnetic suction device 31 using a sealing strip 30, ensuring the low-voltage switchgear had good sealing and protective performance. The entire assembly process was efficient and convenient, significantly shortening construction time. Furthermore, the modular design of the low-voltage switchgear facilitated subsequent maintenance and expansion.

[0036] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A modular, quick assembly low voltage cabinet characterized by: The cabinet includes a cabinet frame (1), which is composed of multiple horizontal beams (2) and vertical beams (3) spliced ​​together. The horizontal beams (2) and vertical beams (3) are fixedly connected by slot-type connectors (4). The inner side of the slot-type connectors (4) is provided with elastic buckles (5), which cooperate with the positioning holes (6) at the ends of the horizontal beams (2) and vertical beams (3). The cabinet frame (1) is equipped with modular unit components (10). The modular unit components (10) include circuit breaker modules (11), relay modules (12), capacitor modules (13), and expansion function modules (14). Each module is connected to the cabinet frame (1) through a slide rail mechanism. The slide rail mechanism consists of T-shaped guide rails (15) and ball sliders (16). The T-shaped guide rails (15) run along the cabinet frame (11) 1) The inner sidewall is arranged longitudinally, and the ball slider (16) is fixed to the outer sidewall of the modular unit assembly (10) and slides with the T-shaped guide rail (15); the top and bottom of the modular unit assembly (10) are respectively provided with a pin group (21) and a socket group (22), the contact surface of the pin group (21) and the socket group (22) is coated with a conductive silver layer (26), and the pin group (21) and the socket group (22) are connected by a spring-loaded guide post (27); the cabinet frame (1) is equipped with a protective shell (28), which is composed of multiple detachable panels (29), and each panel (29) has a sealing strip (30) on its edge. The sealing strip (30) is embedded in the groove (35) of the cabinet frame (1) and fixed by a magnetic attraction device (31).

2. A modular, quick assembly low voltage cabinet as claimed in claim 1, wherein: The elastic buckle (5) of the slot-type connector (4) is formed by bending a metal sheet. The center of the elastic buckle (5) is provided with a raised arc-shaped pressure block (7). The arc-shaped pressure block (7) is interference-fitted with the positioning holes (6) at the ends of the crossbeam (2) and the vertical beam (3). The two ends of the elastic buckle (5) extend outward to form an operating handle (8). The outer surface of the operating handle (8) is provided with anti-slip texture (9).

3. The modular rapid assembly low-voltage switchgear according to claim 1, characterized in that: The T-shaped guide rail (15) has guide grooves (17) on both sides. The outer side of the ball slider (16) has a flange (18) that matches the guide groove (17). The inner side of the ball slider (16) has a ball socket (19) to accommodate the ball (20). The diameter of the ball socket (19) is larger than the diameter of the ball (20).

4. The modular rapid assembly low-voltage switchgear according to claim 1, characterized in that: The pins (23) are arranged in a rectangular array, and the number of socket holes (24) of the socket group (22) corresponds to the number of pins (23). The inner wall of the socket hole (24) is provided with a gold-plated layer (25).

5. A modular, rapid-assembly low-voltage switchgear according to claim 1, characterized in that: The protective shell (28) has a double-layer structure for its panel (29), with an outer layer of aluminum alloy plate (32) and an inner layer of polyurethane foam board (33). The four corners of the panel (29) are rounded (34).

6. A modular, rapid-assembly low-voltage switchgear according to claim 1, characterized in that: The sealing strip (30) is embedded in the groove (35) of the cabinet frame (1), and the sealing strip (30) fills the gap between the panel (29) and the cabinet frame (1). The magnetic device (31) is fixed to the inside of the panel (29) and adsorbs onto the metal part of the cabinet frame (1).

7. A modular, rapid-assembly low-voltage switchgear according to claim 1, characterized in that: The modular unit assembly (10) is slidably installed or removed along the T-shaped guide rail (15) via a ball slider (16), and the flange (18) of the ball slider (16) engages with the guide groove (17).

8. A modular, rapid-assembly low-voltage switchgear according to claim 1, characterized in that: When the pin assembly (21) is inserted into the socket assembly (22), the spring-loaded guide post (27) is compressed, and the compressed spring pushes the pin assembly (21) to fit into the socket assembly (22).

9. A modular, rapid-assembly low-voltage switchgear according to claim 1, characterized in that: The operating handle (8) of the slotted connector (4) presses the arc-shaped pressure block (7) of the elastic buckle (5) into the positioning hole (6).

10. A modular, rapid-assembly low-voltage switchgear according to claim 1, characterized in that: The panel (29) of the protective shell (28) is fixed to the cabinet frame (1) by a magnetic suction device (31), and the sealing strip (30) is embedded in the groove (35) of the cabinet frame (1).

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