A sealed moisture-proof type ring main unit

Abstract

The application provides a sealed moisture-proof ring main unit, and belongs to the field of ring main units, to solve the problem that the existing ring main unit cannot conveniently and stably seal the threading hole of a cable, comprising a ring main unit shell, a ring main unit body is installed in the ring main unit shell, a cable is connected to the ring main unit body, a fixing cylinder and a gas storage frame are welded and fixed on the ring main unit shell, a rubber air bag is fixedly connected in the fixing cylinder, a door plate is installed on the ring main unit shell, a sealing frame is fixedly connected in the ring main unit shell, and the sealing frame is attached to the door plate. The gas storage frame and the rubber piston are arranged, the rubber air bag in the fixing cylinder can be conveniently inflated, the connection between the cable and the ring main unit shell can be conveniently and stably sealed and protected, and external rainwater or humid air cannot enter the ring main unit shell through the threading part of the cable, thereby avoiding the adverse effect of the ring main unit.

Description

Technical Field

[0001] This utility model relates to the field of ring main units, and more specifically, to a sealed and moisture-proof ring main unit. Background Technology

[0002] In modern power systems, ring main units (RMS) are key equipment in distribution networks, undertaking important functions such as power distribution, control, and protection. They are widely used in urban residential areas, commercial centers, industrial parks, and other places. By using ring network power supply, they improve the reliability and flexibility of power supply and effectively reduce the time and scope of power outages.

[0003] Existing ring main units have some problems in actual operation. For example, an outdoor ring main unit with self-cleaning function (publication number CN217769105U) uses a moving vacuum cleaner to clean the inside of the unit, but it lacks moisture-proof function. Therefore, during outdoor operation, moisture from the outside air can easily enter the ring main unit, causing short circuits and insulation aging of the internal electrical components. Furthermore, existing ring main units cannot easily and stably seal the cable penetration holes during actual operation. Therefore, in rainy weather, water from the outside environment can easily enter the ring main unit, resulting in poor practicality and safety. Therefore, we have made improvements and proposed a sealed and moisture-proof ring main unit. Utility Model Content

[0004] The purpose of this utility model is to address the problems that existing ring main units do not have moisture-proof functions and cannot provide convenient and stable sealing treatment for cable threading holes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A sealed, moisture-proof ring main unit was developed to address the aforementioned issues.

[0006] The application is as follows: The device includes a ring main unit (RNU) housing, within which the RNU body is installed. Partition plates are welded to both sides of the RNU housing's interior. A processing box is welded to the partition plates, and an air duct is connected to the processing box. A support rod is welded to the processing box, and a servo motor is welded to the support rod. The output end of the servo motor is connected to a drive shaft, and an exhaust fan and a fixing rod are welded to the drive shaft. A rotating ring is welded to the fixing rod, and a through hole is formed in the rotating ring. A sponge rod is fixedly connected to the bottom surface of the rotating ring. A filter plate and a desiccant plate are slidably connected through the processing box. Cables are connected to the RNU body. A fixing cylinder and an air storage frame are welded to the RNU housing housing, and a rubber airbag is fixedly connected inside the fixing cylinder. A door panel is installed on the RNU housing housing, and a sealing frame is fixedly connected inside the RNU housing housing, with the sealing frame fitting snugly against the door panel.

[0007] As a preferred technical solution of this application, the side end face of the processing box is flush with the outer wall of the ring main unit, the air guide pipes are symmetrically distributed on the upper and lower sides of the processing box, the end of the air guide pipes is flush with the inner side of the partition plate, and the fixing rods are symmetrically distributed on both sides inside the rotating ring.

[0008] As a preferred technical solution of this application, the through holes are distributed at equal angles on the rotating ring, and the through holes correspond one-to-one with the sponge rods. A liquid storage tank is welded and fixed on the outer shell of the ring network cabinet. A water inlet pipe is connected to the top side of the liquid storage tank, and a drain pipe is connected to the bottom side of the liquid storage tank. The bottom end face of the drain pipe is in contact with the top end face of the rotating ring.

[0009] As a preferred technical solution of this application, a sealing plate is fixedly connected to both the filter plate and the dehumidifying plate. The filter plate and the dehumidifying plate are in contact with each other. The sealing plate is in contact with the outer wall of the treatment box. A fixing plate is welded and fixed to the treatment box. A return spring is welded and fixed to the fixing plate. A stop bar is welded and fixed to the return spring. The stop bar is slidably connected to the fixing plate and is in contact with the sealing plate.

[0010] As a preferred technical solution of this application, a connecting mesh plate is welded and fixed to the top of the gas storage frame, a threaded rod is threadedly connected to the connecting mesh plate, a rubber piston is rotatably connected to the bottom end of the threaded rod, the rubber piston is limited and slidably connected inside the gas storage frame, a connecting pipe is connected to the bottom of the gas storage frame, and the bottom of the connecting pipe is connected to the rubber airbag.

[0011] As a preferred technical solution of this application, the fixed cylinders are equidistantly distributed on the outer shell of the ring main unit. The fixed cylinders correspond one-to-one with the air storage frame through connecting pipes. The rubber airbag is cylindrical in shape. The inner wall of the rubber airbag is attached to the cable. The threaded rod is connected to the center of the rubber piston.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. By continuously rotating the exhaust fan, the air inside the ring main unit can be automatically and stably circulated using the processing box and the air ducts on the upper and lower sides. At the same time, the filter plate and dehumidifying plate inside the processing box can filter and dehumidify the internal air, thereby preventing humid air from entering the ring main unit and automatically dehumidifying the air inside the ring main unit. This effectively avoids problems such as short circuits of electrical components and insulation aging caused by moisture, thereby improving the operational stability and reliability of the ring main unit, reducing the probability of failure, and ensuring the safe operation of the power system. 2. The fixed rod can drive the rotating ring to rotate synchronously during the operation of the exhaust fan. Combined with the drain pipe and various through holes, water in the liquid storage tank can be intermittently transported to the sponge rod. By utilizing the heat absorption of water evaporation and air circulation, the internal cooling and heat dissipation of the ring main unit can be achieved. Furthermore, the baffle and sealing plate can be used to easily disassemble and install the filter plate and desiccant plate, thereby ensuring the convenience of subsequent cleaning or replacement of the filter plate and desiccant plate and ensuring the stability of the desiccant operation inside the ring main unit. 3. The air storage frame and rubber piston allow for convenient inflation of the rubber air bladder inside the fixed cylinder, which in turn provides a convenient and stable seal between the cable and the ring main unit's outer casing. This prevents external rainwater or humid air from entering the ring main unit's casing through the cable threading points and causing adverse effects. Similarly, the sealing frame provides a convenient and stable seal at the door panel connection, increasing the versatility and safety of the ring main unit. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of the sealed and moisture-proof ring main unit provided in this application; Figure 2 A schematic diagram of the connection structure between the fixed cylinder and the rubber airbag of the sealed and moisture-proof ring main unit provided in this application; Figure 3 A schematic diagram of the connection structure between the support rod and the servo motor of the sealed and moisture-proof ring main unit provided in this application; Figure 4 A schematic diagram of the overall main cross-sectional structure of the sealed and moisture-proof ring main unit provided in this application; Figure 5 A schematic diagram of the main cross-sectional structure of the treatment box of the sealed and moisture-proof ring main unit provided in this application; Figure 6 For the sealed and moisture-proof ring main unit provided in this application Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 A top view of the rotating ring structure of the sealed and moisture-proof ring main unit provided in this application; Figure 8 A top view of the filter plate structure of the sealed and moisture-proof ring main unit provided in this application; Figure 9 A side sectional view of the outer shell of the sealed and moisture-proof ring main unit provided in this application; Figure 10 For the sealed and moisture-proof ring main unit provided in this application Figure 9 Enlarged structural diagram at point B; Figure 11 A top-section structural diagram of the gas storage frame of the sealed and moisture-proof ring main unit provided in this application; Figure 12 This is a schematic diagram of the sealing frame structure of the sealed and moisture-proof ring main unit provided in this application.

[0014] The diagram shows: 1. Ring main unit outer shell; 2. Ring main unit body; 3. Partition plate; 4. Processing box; 5. Air duct; 6. Support rod; 7. Servo motor; 8. Drive shaft; 9. Exhaust fan; 10. Fixing rod; 11. Rotating ring; 12. Through hole; 13. Sponge rod; 14. Liquid storage tank; 15. Water inlet pipe; 16. Drain pipe; 17. Filter plate; 18. Dehumidifying screen plate; 19. Sealing plate; 20. Fixing plate; 21. Return spring; 22. Stop bar; 23. Cable; 24. Fixing cylinder; 25. Rubber airbag; 26. Air storage frame; 27. Connecting screen plate; 28. Threaded rod; 29. ​​Rubber piston; 30. Connecting pipe; 31. Door panel; 32. Sealing frame. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0016] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0017] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Example 1: like Figures 1-12 As shown, this embodiment proposes a sealed and moisture-proof ring main unit, including a ring main unit shell 1, a ring main unit body 2 installed inside the ring main unit shell 1, partition plates 3 welded and fixed to both sides inside the ring main unit shell 1, a processing box 4 welded and fixed to the partition plates 3, an air guide pipe 5 connected to the processing box 4, a support rod 6 welded and fixed inside the processing box 4, a servo motor 7 welded and fixed to the support rod 6, a drive shaft 8 connected to the output end of the servo motor 7, an exhaust fan 9 and a fixing rod 10 welded and fixed to the drive shaft 8, and a fixing rod 10 welded and fixed to the fixing rod 10. A rotating ring 11 is fixed, and a through hole 12 is opened through the rotating ring 11. A sponge rod 13 is fixedly connected to the bottom end face of the rotating ring 11. A filter plate 17 and a dehumidifying mesh plate 18 are slidably connected through the treatment box 4. A cable 23 is connected to the ring network cabinet body 2. A fixing cylinder 24 and an air storage frame 26 are welded and fixed to the ring network cabinet shell 1. A rubber air bag 25 is fixedly connected inside the fixing cylinder 24. A door panel 31 is installed on the ring network cabinet shell 1. A sealing frame 32 is fixedly connected inside the ring network cabinet shell 1. The sealing frame 32 fits against the door panel 31.

[0021] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. like Figure 4 and Figure 5As shown, in a preferred embodiment, based on the above method, the side end face of the processing box 4 is flush with the outer wall of the ring main unit shell 1, the air guide pipes 5 are symmetrically distributed on the upper and lower sides of the processing box 4, the end of the air guide pipes 5 is flush with the inner side of the partition plate 3, and the fixing rods 10 are symmetrically distributed on both sides inside the rotating ring 11. With the continuous rotation of the exhaust fan 9, the processing box 4 and the air guide pipes 5 on the upper and lower sides can drive the air inside the ring main unit shell 1 to automatically and stably circulate, ensuring the stability of subsequent cooling work.

[0022] like Figures 5-7 As shown, in a preferred embodiment, based on the above method, the through holes 12 are distributed at equal angles on the rotating ring 11, and the through holes 12 correspond one-to-one with the sponge rods 13. A liquid storage tank 14 is welded and fixed on the outer shell 1 of the ring main unit. A water inlet pipe 15 is connected to the top side of the liquid storage tank 14, and a drain pipe 16 is connected to the bottom side of the liquid storage tank 14. Solenoid valves are installed on both the water inlet pipe 15 and the drain pipe 16. The bottom end face of the drain pipe 16 is in contact with the top end face of the rotating ring 11. During the operation of the exhaust fan 9, the rotating ring 11 can be driven to rotate synchronously. Combined with the drain pipe 16 and each through hole 12, the water in the liquid storage tank 14 can be intermittently transported to the sponge rods 13. By utilizing the heat absorption of water evaporation and the air circulation, the internal cooling and heat dissipation of the ring main unit can be achieved.

[0023] like Figure 5 , Figure 6 and Figure 8 As shown, in a preferred embodiment, based on the above method, a sealing plate 19 is further fixedly connected to both the filter screen 17 and the dehumidifying screen 18. The filter screen 17 and the dehumidifying screen 18 are in contact with each other, and the sealing plate 19 is in contact with the outer wall of the treatment box 4. A fixing plate 20 is welded and fixed to the treatment box 4, and a return spring 21 is welded and fixed to the fixing plate 20. A stop rod 22 is welded and fixed to the return spring 21. The stop rod 22 is slidably connected to the fixing plate 20, and the stop rod 22 is connected to the sealing plate 18. With the 9-phase mesh fitting together, the filter screen 17 and dehumidifying screen 18 inside the processing box 4 work together to filter and dehumidify the internal air, thereby preventing humid air from entering the ring main unit housing 1. At the same time, it can automatically dehumidify the air inside the ring main unit housing 1. Furthermore, the filter screen 17 and dehumidifying screen 18 can be easily disassembled and installed using the baffle 22 and sealing plate 19, thus ensuring the convenience of subsequent cleaning or replacement of the filter screen 17 and dehumidifying screen 18.

[0024] like Figures 9-11As shown, in a preferred embodiment, based on the above method, a connecting mesh plate 27 is welded and fixed to the top of the gas storage frame 26. A threaded rod 28 is threadedly connected to the connecting mesh plate 27. A rubber piston 29 is rotatably connected to the bottom end of the threaded rod 28. The rubber piston 29 is slidably connected within the gas storage frame 26. A connecting pipe 30 is connected to the bottom of the gas storage frame 26. The bottom of the connecting pipe 30 is connected to the rubber airbag 25. Fixed cylinders 24 are equidistantly distributed on the outer shell 1 of the ring main unit. The fixed cylinders 24 are connected to the connecting pipes 30. Corresponding one-to-one with the air storage frame 26, the rubber airbag 25 is cylindrical in shape. The inner wall of the rubber airbag 25 is in close contact with the cable 23. The threaded rod 28 is connected to the center of the rubber piston 29. Using the air storage frame 26 and the rubber piston 29, the rubber airbag 25 in the fixed cylinder 24 can be easily inflated, thereby providing convenient and stable sealing protection for the connection between the cable 23 and the ring main unit housing 1, preventing external rainwater or humid air from entering the ring main unit housing 1 through the cable 23's threading part.

[0025] Specifically, when this sealed and moisture-proof ring main unit is in use: First, during the operation of the ring main unit, under the drive of the servo motor 7, the exhaust fan 9 can be driven to rotate stably through the drive shaft 8. Combined with the processing box 4 and the air guide pipes 5 on the upper and lower sides, the air inside the ring main unit shell 1 can be automatically and stably circulated. At the same time, under the rotation of the drive shaft 8, the rotating ring 11 can be driven to rotate stably through the fixed rod 10. At this time, each through hole 12 can be intermittently aligned with the drain pipe 16. Therefore, the water in the liquid storage tank 14 can be stably transported to the through hole 12 through the drain pipe 16, and then stably transported to the sponge rod 13. The sponge rod 13 can stably absorb the water, and during the air circulation, the evaporation of water absorbs heat, which can cool the circulating air, thereby realizing the internal cooling and heat dissipation of the ring main unit.

[0026] Furthermore, during air circulation, the combined action of the filter plate 17 and dehumidifying plate 18 inside the processing box 4 effectively filters and dehumidifies the internal air, preventing humid air from entering the ring main unit's outer casing 1. Simultaneously, it automatically dehumidifies the air inside the ring main unit's outer casing 1, effectively preventing problems such as short circuits and insulation aging caused by moisture. After prolonged operation, the operator can move the lever 22 to disengage it from the sealing plate 19, allowing the filter plate 17 and dehumidifying plate 18 to be removed via the sealing plate 19. The filter screen 17 and desiccant screen 18 are removed from the treatment box 4 to ensure convenient cleaning or replacement of the filter screen 17 and desiccant screen 18. After cleaning or replacement, the stop lever 22 can be moved again to insert the filter screen 17 and desiccant screen 18 into the treatment box 4. Then the stop lever 22 can be released. At this time, under the elastic action of the return spring 21 on the fixed plate 20, the stop lever 22 can be driven to move and reset, and block the sealing plate 19, thus completing the locking and installation of the filter screen 17 and desiccant screen 18 and ensuring the stability of the filter screen 17 and desiccant screen 18 in subsequent operation.

[0027] Furthermore, during the installation of the ring main unit 2, the operator can pass the cable 23 on the ring main unit 2 through the rubber air bladder 25 inside the fixed cylinder 24. Then, by rotating the threaded rod 28 on the connecting plate 27, the threaded rod 28 can push the rubber piston 29 to move downward steadily. This allows the rubber air bladder 25 inside the fixed cylinder 24 to be easily inflated through the connecting pipe 30, thereby providing a convenient and stable seal between the cable 23 and the ring main unit housing 1. This prevents external rainwater or humid air from entering the ring main unit housing 1 through the cable 23's threading point and causing adverse effects on the ring main unit. Moreover, the sealing frame 32 can provide a convenient and stable seal at the connection of the door panel 31.

[0028] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, as well as all technical solutions and improvements that do not depart from the spirit and scope of practicality, are covered within the scope of the claims of the present utility model.

Claims

1. A sealed moisture-proof ring main unit, comprising a ring main unit shell (1), characterized in that, The ring main unit (2) is installed inside the outer shell (1) of the ring main unit. Partition plates (3) are welded and fixed to both sides inside the outer shell (1). A processing box (4) is welded and fixed to the partition plates (3). A duct pipe (5) is connected to the processing box (4). A support rod (6) is welded and fixed inside the processing box (4). A servo motor (7) is welded and fixed to the support rod (6). A drive shaft (8) is connected to the output end of the servo motor (7). An exhaust fan (9) and a fixing rod (10) are welded and fixed to the drive shaft (8). A rotating ring (11) is welded and fixed to the fixing rod (10). A through hole (12) is provided on the ring (11). A sponge rod (13) is fixedly connected to the bottom end of the rotating ring (11). A filter plate (17) and a dehumidifying mesh plate (18) are slidably connected inside the processing box (4). A cable (23) is connected to the ring cabinet body (2). A fixing cylinder (24) and an air storage frame (26) are welded and fixed on the ring cabinet shell (1). A rubber airbag (25) is fixedly connected inside the fixing cylinder (24). A door panel (31) is installed on the ring cabinet shell (1). A sealing frame (32) is fixedly connected inside the ring cabinet shell (1). The sealing frame (32) is in contact with the door panel (31).

2. The sealed moisture-proof type ring main unit according to claim 1, characterized in that, The side end face of the processing box (4) is flush with the outer wall of the ring network cabinet shell (1). The air guide pipe (5) is symmetrically distributed on the upper and lower sides of the processing box (4). The end of the air guide pipe (5) is flush with the inner side of the partition plate (3). The fixing rod (10) is symmetrically distributed on both sides inside the rotating ring (11).

3. The sealed moisture-proof type ring main unit according to claim 1, characterized in that, The through holes (12) are distributed at equal angles on the rotating ring (11). The through holes (12) correspond one-to-one with the sponge rods (13). A liquid storage tank (14) is welded and fixed on the outer shell (1) of the ring network cabinet. A water inlet pipe (15) is connected to the top side of the liquid storage tank (14). A drain pipe (16) is connected to the bottom side of the liquid storage tank (14). The bottom end face of the drain pipe (16) is in contact with the top end face of the rotating ring (11).

4. The sealed moisture-proof type ring main unit according to claim 1, characterized in that, A sealing plate (19) is fixedly connected to both the filter plate (17) and the dehumidifying plate (18). The filter plate (17) and the dehumidifying plate (18) are in contact with each other. The sealing plate (19) is in contact with the outer wall of the treatment box (4). A fixing plate (20) is welded and fixed to the treatment box (4). A return spring (21) is welded and fixed to the fixing plate (20). A stop bar (22) is welded and fixed to the return spring (21). The stop bar (22) is slidably connected to the fixing plate (20). The stop bar (22) is in contact with the sealing plate (19).

5. The sealed moisture-proof type ring main unit according to claim 1, characterized in that, A connecting mesh plate (27) is welded and fixed to the top of the gas storage frame (26). A threaded rod (28) is threadedly connected to the connecting mesh plate (27). A rubber piston (29) is rotatably connected to the bottom end of the threaded rod (28). The rubber piston (29) is limited and slidably connected inside the gas storage frame (26). A connecting pipe (30) is connected to the bottom of the gas storage frame (26). The bottom of the connecting pipe (30) is connected to the rubber airbag (25).

6. The sealed moisture-proof type ring main unit according to claim 5, characterized in that, The fixed cylinders (24) are evenly distributed on the outer shell (1) of the ring main unit. The fixed cylinders (24) correspond one-to-one with the air storage frame (26) through the connecting pipe (30). The rubber airbag (25) is cylindrical in shape. The inner wall of the rubber airbag (25) is attached to the cable (23). The threaded rod (28) is connected to the center of the rubber piston (29).

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