Modular outdoor ring main unit
By designing connecting grooves, connecting plates, and top plate components on the ring main unit, and using countersunk screws and sealant, the problems of cumbersome disassembly and inconvenient connection of the ring main unit are solved, realizing convenient assembly and enhanced sealing effect, thus improving the practicality of the ring main unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI WANHONG ELECTRICAL EQUIP
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-26
AI Technical Summary
Existing modular ring main units are cumbersome to disassemble and connect, and it is not convenient to combine multiple individual ring main units to form a large-volume ring main unit assembly, which affects practicality.
By designing the connecting groove, connecting plate, U-shaped plate and top plate components of the ring main unit, and using countersunk screws and sealant, the ring main unit can be easily connected and sealed, forming a modular structure.
It enables convenient disassembly and assembly of individual ring main unit units, enhances the sealing effect, extends service life, and improves the practicality of the ring main unit.
Smart Images

Figure CN224418252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ring main unit technology, and specifically discloses a modular outdoor ring main unit. Background Technology
[0002] Outdoor ring main unit (RNU) is a high-voltage power distribution device specifically designed for outdoor environments. It is primarily used in ring network power distribution systems (ring power supply systems) and features full sealing and insulation. It is suitable for power distribution in urban residential areas, highways, industrial and mining enterprises, and other similar locations. Its core function is to distribute, control, and protect electrical energy through load switches and fuses, and it supports dual power supply to improve reliability.
[0003] Chinese patent CN210201192U discloses a modular ring main unit, including a ring main unit body. A fan is fixedly connected to the top of the ring main unit body. The output end of the fan is connected to a pipe. The bottom of the pipe is connected to a folded pipe. The bottom of the folded pipe is connected to a sleeve. A vertical pipe is provided inside the sleeve. The bottom of the vertical pipe extends to the bottom of the sleeve. A first groove is provided on both the front and rear sides of the inside of the sleeve. This utility model solves the problem that existing ring main units mostly require tools to remove bolts during disassembly, which is cumbersome and prone to bolt loss. This modular ring main unit is easy to disassemble, improving its practicality. However, the aforementioned ring main units are not convenient for connecting multiple units together to form a single unit, resulting in a larger overall size and impacting practicality. Therefore, to address these issues, this utility model proposes a modular outdoor ring main unit. Utility Model Content
[0004] The present invention aims to provide a modular outdoor ring main unit, which facilitates the assembly of multiple ring main units into a larger ring main unit according to actual usage needs, thereby improving the practicality of the ring main unit.
[0005] This utility model is achieved through the following technical solution:
[0006] A modular outdoor ring main unit includes a ring main unit assembly, which comprises multiple individual ring main units. Each individual ring main unit has a first side plate and a second side plate connected to its two sides respectively. A first U-shaped plate is provided at the connection between the first side plate and the ring main unit body, and a second U-shaped plate is provided at the connection between the second side plate and the ring main unit body. Multiple third U-shaped plates are provided between the first and second U-shaped plates. A top plate assembly is provided above the ring main unit assembly, which includes a first top plate and a second top plate. Multiple third top plates are provided between the first and second top plates.
[0007] As a further feature of the above scheme, two connecting slots and connecting plates are respectively provided on both sides of the ring main unit. Two connecting plates are symmetrically provided on the side of the first side plate near the ring main unit, and two connecting slots are symmetrically provided on the side of the second side plate near the ring main unit. This lays the foundation for the connection between ring main units and the connection between the ring main unit and the first and second side plates.
[0008] As a further feature of the above solution, a plurality of countersunk holes are provided on one side of the connecting groove, and countersunk screws are threaded into the internal parts of the countersunk holes. The countersunk screws pass through the interior of the connecting plate and are threadedly connected to the connecting plate, which facilitates the assembly of the ring main unit, the first side plate and the second side plate.
[0009] As a further improvement to the above solution, the lower ends of the first and third U-shaped plates are detachably connected to the lower ends of both sides of the ring main unit, which can seal the gap at the connection between the first side plate and the ring main unit, and seal the gap at the connection between ring main units. The lower ends of the second U-shaped plate are detachably connected to the lower ends of both sides of the second side plate, which can seal the gap at the connection between the ring main unit and the second side plate, preventing dust, rainwater and other impurities from seeping into the ring main unit from the gaps. Sealant can also be applied to the edges of the three types of U-shaped plates to further ensure the sealing effect and extend the service life of the ring main unit.
[0010] As a further feature of the above solution, mounting plates are connected to the bottom of both the first and second top plates. The two mounting plates are detachably connected to the first and second side plates, respectively. The first top plate is detachably connected to the third top plate. The second top plate is detachably connected to the side of the third top plate away from the first top plate. The third top plate is detachably connected to the third top plate. This facilitates the assembly of the three types of top plates together to form a top plate assembly. Sealant and waterproof glue are added to the gaps at the joints of the three types of top plates for sealing and waterproofing. The tops of the three types of top plates all have a sloping surface that is higher in the middle and lower on both sides, which can prevent rainwater from accumulating on the top of the top plate assembly.
[0011] The specific structure of the ring main unit and the structure of its internal components in this utility model are existing technologies and are not the focus of this utility model's improvement; therefore, they are not shown in the figures.
[0012] The present invention has the following beneficial effects during use:
[0013] The combination of ring main unit, connecting groove, connecting plate, first side plate and second side plate allows users to connect multiple ring main units together to form a whole according to actual needs. The first side plate and second side plate are installed at both ends of the whole to form a complete ring main unit assembly, which improves the practicality of the ring main unit.
[0014] The use of three types of U-shaped plates can seal the gaps at the connection between the first side plate and the ring main unit, seal the gaps at the connection between individual ring main units, and seal the gaps at the connection between the individual ring main units and the second side plate, preventing dust, rainwater, and other impurities from seeping into the individual ring main units through the gaps and ensuring the sealing effect of the ring main unit.
[0015] The use of the top plate assembly can seal the gaps between the ring main unit and the three types of U-shaped plates from the top of the ring main unit assembly, further improving the water-proof performance of the ring main unit. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a first perspective view of the present invention;
[0018] Figure 2 This is a second perspective view of the present invention;
[0019] Figure 3 This is a perspective view of a single unit of the central ring network cabinet of this utility model;
[0020] Figure 4 This is an exploded view of the single ring network cabinet unit and the first U-shaped plate assembly of this utility model;
[0021] Figure 5 This is a perspective view of the second side plate and the second U-shaped plate in this utility model;
[0022] Figure 6 This is a perspective view of the central ring network cabinet unit and the second side panel of this utility model;
[0023] Figure 7 This is an exploded view of the top plate assembly in this utility model.
[0024] In the diagram: 1. Ring main unit assembly; 101. Ring main unit unit; 102. Connecting groove; 1021. Countersunk hole; 103. Countersunk screw; 104. Connecting plate; 105. First side plate; 106. Second side plate; 2. First U-shaped plate; 3. Second U-shaped plate; 4. Third U-shaped plate; 5. Top plate assembly; 501. First top plate; 502. Second top plate; 503. Mounting plate; 504. Third top plate. Detailed Implementation
[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments.
[0027] An embodiment discloses a modular outdoor ring main unit, including a ring main unit assembly. The ring main unit assembly includes multiple ring main unit cells 101. A first side plate 105 and a second side plate 106 are respectively connected to both sides of the ring main unit cell 101. A first U-shaped plate 2 is provided at the connection between the first side plate 105 and the ring main unit body. A second U-shaped plate 3 is provided at the connection between the second side plate 106 and the ring main unit body. Multiple third U-shaped plates 4 are provided between the first U-shaped plate 2 and the second U-shaped plate 3. A top plate assembly 5 is provided on the top of the ring main unit assembly 101. The top plate assembly 5 includes a first top plate 501 and a second top plate 502. Multiple third top plates 504 are provided between the first top plate 501 and the second top plate 502.
[0028] like Figure 4 and Figure 6 As shown, two connecting slots 102 and connecting plates 104 are respectively provided on both sides of the ring main unit 101. Two connecting plates 104 are symmetrically provided on the side of the first side plate 105 near the ring main unit 101, and two connecting slots 102 are symmetrically provided on the side of the second side plate 106 near the ring main unit 101. This lays the foundation for the connection between ring main units 101 and ring main units 101, as well as the connection between ring main units 101 and the first side plate 105 and the second side plate 106.
[0029] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a plurality of countersunk holes 1021 are provided on one side of the connecting groove 102. Countersunk screws 103 are threadedly connected to the inside of the countersunk holes 1021. The countersunk screws 103 pass through the inside of the connecting plate 104 and are threadedly connected to the connecting plate 104, which facilitates the assembly of the ring main unit 101, the first side plate 105 and the second side plate 106.
[0030] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the lower ends of the first U-shaped plate 2 and the third U-shaped plate 4 are detachably connected to the lower ends of both sides of the ring main unit 101, which can seal the gap at the connection between the first side plate 105 and the ring main unit, and seal the gap at the connection between ring main units 101. The lower ends of the second U-shaped plate 3 are detachably connected to the lower ends of both sides of the second side plate 106, which can seal the gap at the connection between the ring main unit 101 and the second side plate 106, preventing dust, rainwater and other impurities from seeping into the ring main unit 101 from the gaps. Sealant can also be applied to the edges of the three U-shaped plates to further ensure the sealing effect and extend the service life of the ring main unit 101.
[0031] like Figure 1 , Figure 2 and Figure 6 As shown, mounting plates 503 are connected to the bottom of the first top plate 501 and the second top plate 502. The two mounting plates 503 are detachably connected to the first side plate 105 and the second side plate 106, respectively. The first top plate 501 is detachably connected to the third top plate 504. The second top plate 502 is detachably connected to the side of the third top plate 504 away from the first top plate 501. The third top plate 504 is detachably connected to the third top plate 504. This facilitates the assembly of the three types of top plates together to form the top plate assembly 5. Sealant and waterproof glue are added to the gaps at the joints of the three types of top plates for sealing and waterproofing. The tops of the three types of top plates are all sloping with a higher middle and lower sides, which can prevent rainwater from accumulating on the top plate assembly 5.
[0032] The modular outdoor ring main unit disclosed in this embodiment determines the required number of ring main unit 101s based on actual usage needs before use. When only one ring main unit 101 is needed, the first side plate 105 and the second side plate 106 are respectively installed on both sides of the ring main unit 101 and fixed with countersunk screws 103. After fixing, the lower ends of the first U-shaped plate 2 are respectively connected to the lower ends of the side of the ring main unit 101 closest to the first side plate 105, and the lower ends of the second U-shaped plate 3 are respectively connected to the lower ends of the second side plate 106. The ring main unit 101 is then connected to the first side plate 105 and the second side plate 106. The gap between the side plates 106 is sealed. Alternatively, waterproof glue and sealant can be squeezed onto the two sides of the first U-shaped plate 2 and the second U-shaped plate 3 to enhance the sealing effect. The two ends of a third top plate 504 are connected to the first top plate 501 and the second top plate 502 respectively to form a top plate assembly 5. The two mounting plates 503 at the lower ends of the top plate assembly 5 are connected to the sides of the first side plate 105 and the second side plate 106 that are far apart from each other. Alternatively, waterproof glue and sealant can be squeezed into the gap between the third top plate 504 and the first top plate 501 and the second top plate 502 to further enhance the seepage prevention effect. At this point, the ring main unit is assembled.
[0033] When multiple ring main unit units 101 need to be connected together to form a ring main unit assembly 1, insert the two connecting plates 104 from one ring main unit 101 into the two connecting slots 102 from another ring main unit 101, and fix them with countersunk screws 103. Then, following the same operation as connecting the ring main unit 101 to the first side plate 105 and the second side plate 106, install the first side plate 105, the second side plate 106, the first U-shaped plate 2, and the second U-shaped plate 3 at both ends of the ring main unit assembly 1. Install the third U-shaped plate 4 on the outside of the gap at the connection between two adjacent ring main units 101. Similarly, apply waterproof glue and sealant to the outside of the three types of U-shaped plates. To further enhance the sealing effect, following the same procedure as the above-mentioned assembly of the top plate assembly 5, a third top plate 504, the same number as the ring main unit 101, is installed between the first top plate 501 and the second top plate 502. Waterproof adhesive and sealant are squeezed into the gaps at the connection between the third top plate 504 and the gaps between the third top plate 504 and the first top plate 501 and the second top plate 502 to further enhance the seepage prevention effect of the top plate assembly 5. The two mounting plates 503 at both ends of the bottom of the top plate assembly 5 are connected to the sides of the first side plate 105 and the second side plate 106 that are far apart from each other. The ring main unit is then assembled and the multiple ring main unit units 101 in the assembled ring main unit are interconnected.
[0034] The components disclosed in this utility model, including the ring main unit 101, connecting groove 102, countersunk screw 103, connecting plate 104, first side plate 105, second side plate 106, first U-shaped plate 2, second U-shaped plate 3, third U-shaped plate 4, first top plate 501, second top plate 502, mounting plate 503, and third top plate 504, are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0035] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, this utility model will not explain the control method and circuit connection in detail. The external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.
[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A modular outdoor ring main unit, comprising ring main unit components, characterized in that, The ring main unit assembly includes multiple ring main unit cells. Each ring main unit cell has a first side plate and a second side plate connected to its two sides respectively. A first U-shaped plate is provided at the connection between the first side plate and the ring main unit body. A second U-shaped plate is provided at the connection between the second side plate and the ring main unit body. Multiple third U-shaped plates are provided between the first U-shaped plates and the second U-shaped plates. A top plate assembly is provided on top of the ring main unit assembly. The top plate assembly includes a first top plate and a second top plate. Multiple third top plates are provided between the first top plate and the second top plate.
2. The modular outdoor ring main unit according to claim 1, characterized in that, Two connecting slots and connecting plates are respectively provided on both sides of the ring main unit. Two connecting plates are symmetrically provided on the side of the first side plate near the ring main unit, and two connecting slots are symmetrically provided on the side of the second side plate near the ring main unit.
3. A modular outdoor ring main unit according to claim 2, characterized in that, A plurality of countersunk holes are provided on one side of the connecting groove, and countersunk screws are threaded into the internal parts of the countersunk holes. The countersunk screws pass through the interior of the connecting plate and are threaded into the connecting plate.
4. A modular outdoor ring main unit according to claim 1, characterized in that, The lower ends of the first U-shaped plate and the third U-shaped plate are detachably connected to the lower ends of both sides of the ring main unit, and the lower ends of the second U-shaped plate are detachably connected to the lower ends of both sides of the second side plate.
5. A modular outdoor ring main unit according to claim 1, characterized in that, A mounting plate is connected to the bottom of both the first top plate and the second top plate. The two mounting plates are detachably connected to the first side plate and the second side plate, respectively. The first top plate is detachably connected to the third top plate, and the second top plate is detachably connected to the side of the third top plate away from the first top plate.