Looped network box with emergency power-off protection
By introducing waterproof and anti-theft devices into the ring network box, the problems of rainwater backflow and ventilation dehumidification in the ring network box during heavy rain have been solved, enabling normal operation and safe maintenance under severe weather conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SHENBANG ELECTRIC CO LTD
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-21
AI Technical Summary
The existing ring main unit's emergency power-off protection device is prone to malfunction during heavy rain, and it also suffers from problems such as rainwater backflow and poor ventilation and dehumidification.
A waterproof device, including a drive cylinder, a baffle plate, and a water level sensor, is designed to automatically block the ventilation opening when rainwater submerges the concrete foundation. It combines a raised platform, a waterproof groove, and waterproof rubber to prevent rainwater from flowing into the cable well, and protects the water level sensor with an anti-theft device to ensure the normal operation of the device.
It effectively prevents rainwater from flowing back into the cable well, avoids the emergency power outage protection device from malfunctioning, improves the dryness and safety of the ring main unit, and protects the water level sensor from being stolen, ensuring safe maintenance.
Smart Images
Figure CN224153822U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of ring main units, and in particular to a ring main unit with emergency power failure protection. Background Technology
[0002] Ring main units (also known as ring main switchgear or ring main power supply units) with emergency power outage protection are a critical piece of equipment in power systems. They are typically used in distribution networks to distribute, control, and protect electrical energy. Emergency power outage protection is one of their key features, ensuring that power can be quickly and safely cut off in emergencies, thereby protecting equipment, personnel, and the power grid.
[0003] In existing technologies, ring main units (RMS) are switching devices where underground cables protrude to the ground. Their cable wells are prone to rainwater ingress. Due to temperature differences between day and night, water vapor condenses and concentrates at weak points in the RMS, causing insulation degradation and malfunctioning of the emergency power-off protection device. To solve this problem, existing technologies typically install a concrete foundation at the bottom of the RMS that is higher than the ground to block rainwater. Ventilation openings are then made around the bottom of the RMS to prevent rainwater from entering the cable well, and these openings allow for natural ventilation and dehumidification.
[0004] However, if there is heavy rainfall, causing rainwater to flood the concrete foundation and enter the cable well through the ventilation openings, resulting in a large amount of rainwater accumulating in the cable well, the dehumidification effect of the ventilation openings cannot keep up with the water vapor condensation, causing the emergency power-off device to activate incorrectly. Therefore, a ring main unit with emergency power-off protection is needed to solve this technical problem. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of this application is to provide a ring main unit with emergency power outage protection to solve the technical problem that the emergency power outage protection device may be erroneously activated in heavy rain.
[0006] The above-mentioned objective of this application is achieved through the following technical solution: a ring main unit with emergency power failure protection, comprising a ring main unit and a cement foundation, wherein the ring main unit is fixedly connected to the surface of the cement foundation, a ventilation opening is provided at the bottom of the ring main unit, and waterproof devices are provided on both sides of the lower end of the ring main unit. The waterproof devices include a drive cylinder fixedly connected to both sides of the inside of the ring main unit, a baffle plate fixedly connected to the output end of the drive cylinder, and a water level sensor fixedly connected to the outside of the cement foundation. The baffle plate is used to block the ventilation opening of the ring main unit, and the water level sensor signal is connected to the cylinder controller of the drive cylinder. The output end of the drive cylinder faces downward.
[0007] By adopting the above technical solution, when rainwater is about to submerge the cement foundation, the water level sensor detects the water level signal and sends a start signal to the drive cylinder. The output end of the drive cylinder pushes the baffle plate to block the ventilation opening at the bottom of the ring main unit. In this way, even if the rainwater submerges the cement foundation, it will not flow into the cable well through the ventilation opening, causing rainwater to accumulate in the cable well. This would lead to water vapor condensation and cause the emergency power failure protection device to activate incorrectly. When the rainwater recedes, the water level sensor sends a shut-off signal, and the drive cylinder retracts its output end, so that the baffle plate no longer blocks the ventilation opening, allowing the ring main unit to ventilate and dehumidify normally. This solves the technical problem in the prior art that the emergency power failure protection device may activate incorrectly in heavy rain. In addition, the baffle plate can effectively prevent rainwater from flowing back into the cable well, preventing the cables in the cable well from malfunctioning due to rainwater soaking, and improving the safety of workers inspecting the ring main unit.
[0008] Furthermore, a raised platform is fixedly provided on the inner side of the cement foundation for use in conjunction with the water-retaining plate for waterproofing.
[0009] While the above-mentioned technical solution prevents rainwater from entering the cable well, the water baffle, when pushed by the driving cylinder to block the ventilation opening, leaves small gaps between it and the side wall of the ring main unit's ventilation opening due to its vertical movement. This allows rainwater to flow into the cable well through these gaps. Although the amount of water flowing in is small, the poor ventilation and dehumidification effect of the ring main unit at present is caused by the water baffle blocking the ventilation opening. The raised platform solves this problem. When the driving cylinder pushes the water baffle downwards, it abuts against the raised platform, causing the end of the water baffle away from the output end of the driving cylinder to press against the raised platform. This ensures that even if rainwater flows in through the gap between the water baffle and the side wall of the ring main unit's ventilation opening, it will be blocked by the raised platform, preventing rainwater from flowing into the cable well and improving the dryness of the ring main unit.
[0010] Furthermore, the raised platform has a waterproof groove with the same shape as the water baffle on the side near the water baffle, and waterproof rubber is fixedly provided on the bottom surface of the waterproof groove.
[0011] While the raised platform can prevent rainwater from flowing into the cable well, in special circumstances, such as when the baffle fails to block the ventilation opening, pedestrians may accidentally kick small stones onto the raised platform. This can cause gaps between the baffle and the platform, allowing rainwater to flow in. The waterproof groove and waterproof rubber solve this problem. When the baffle is pushed down by the cylinder, it extends into the waterproof groove and presses against the waterproof rubber. Because the rubber is elastic, even if small stones are on it, other parts of the rubber will spring up to fill the gap, preventing rainwater from flowing into the cable well and improving the waterproofing effect of the baffle and the raised platform.
[0012] Furthermore, a water passage hole is provided on one side of the outer side of the cement foundation, extending to the side wall of the waterproof groove.
[0013] By adopting the above technical solution, the water passage hole allows rainwater accumulated in the waterproof groove to flow out through the water passage hole, so that no water will remain on the raised platform, ensuring the dryness of the ring network box.
[0014] Furthermore, an anti-theft device is provided on one side of the water level sensor to prevent the water level sensor from being stolen.
[0015] By adopting the above technical solution, although the waterproof device can prevent rainwater from entering the cable well and affecting the dryness of the ring network box, the water level sensor can only be installed on the outside of the cement foundation to detect the water level. This makes the water level sensor located on the outside of the cement foundation easy to be stolen. The anti-theft device can prevent the water level sensor from being stolen.
[0016] Furthermore, the anti-theft device includes two opposing fixed plates, an anti-theft shell located between the two fixed plates, a connecting piece, a fixing piece, and a padlock. The two fixed plates are set at the upper and lower ends on one side of the water level sensor and are fixedly connected to the cement foundation. One end of the anti-theft shell is rotatably connected to the fixed plate, and the other end is fixedly connected to the connecting piece. The fixing piece is fixedly set on the side of the water level sensor away from the fixed plate and is fixedly connected to the cement foundation. The padlock passes through the connecting piece and the fixing piece to lock the anti-theft shell.
[0017] By adopting the above technical solution, the anti-theft shell is rotated to cover the water level sensor, and then a padlock is used to lock the anti-theft shell through the connecting piece and the fixing piece. This can prevent the water level sensor from being stolen and improve the anti-theft performance of the water level sensor.
[0018] Furthermore, the anti-theft shell has a water inlet hole that penetrates the anti-theft shell on the side away from the cement foundation.
[0019] While the anti-theft device can improve the anti-theft performance of the water level sensor by adopting the above technical solution, the anti-theft shell covers the water level sensor, causing the water level sensor to be unable to detect the water level, which prevents the baffle plate from blocking water in time. The setting of the water inlet hole solves this technical problem. The setting of the water inlet hole allows the anti-theft shell to not only prevent the water level sensor from being stolen, but also allows water to come into contact with the water level sensor through the water inlet hole, so that the drive cylinder can receive the signal in time and drive the baffle plate to block water.
[0020] Furthermore, an arc-shaped baffle is fixedly provided on the upper outer side of the vent.
[0021] By adopting the above technical solution, the arc-shaped baffle can prevent splashed rainwater from falling into the cable well.
[0022] In summary, this application includes at least one of the following beneficial technical effects.
[0023] By implementing a waterproof device, when rainwater is about to submerge the concrete foundation, the water level sensor detects the water level signal and sends a start signal to the drive cylinder. The output of the drive cylinder pushes the baffle plate to block the ventilation opening at the bottom of the ring main unit. This prevents rainwater from flowing into the cable well through the ventilation opening, causing water accumulation and condensation that could lead to the erroneous activation of the emergency power-off protection device. Once the rainwater recedes, the water level sensor sends a shut-off signal, and the drive cylinder retracts its output, allowing the baffle plate to no longer block the ventilation opening and enabling the ring main unit to ventilate and dehumidify normally. This solves the technical problem of the emergency power-off protection device potentially erroneously activating during heavy rain in existing technologies. Furthermore, the baffle plate effectively prevents rainwater from flowing back into the cable well, preventing cable malfunctions due to rainwater immersion and improving the safety of personnel during ring main unit maintenance.
[0024] By incorporating a raised platform, a waterproof groove, and waterproof rubber, the system achieves the goal of preventing rainwater from flowing into the cable well when the baffle is pushed down by the driving cylinder. The baffle extends into the waterproof groove and compresses the waterproof rubber. Because the waterproof rubber is elastic, even if there are small stones on it, other parts of the waterproof rubber will bounce up to fill the gap. This prevents rainwater flowing into the raised platform from flowing into the cable well, thus improving the waterproofing effect of the baffle and the raised platform.
[0025] By setting up an anti-theft device, the anti-theft shell can be rotated to cover the water level sensor, and then a padlock can be used to lock the anti-theft shell through the connecting piece and the fixing piece. This can prevent the water level sensor from being stolen and improve the anti-theft performance of the water level sensor. Attached Figure Description
[0026] Figure 1 This is an overall structural diagram of the embodiment;
[0027] Figure 2 It is along Figure 1 A sectional view of line A_A in the middle;
[0028] Figure 3 yes Figure 2 Enlarged view of section A in the middle;
[0029] Figure 4 yes Figure 1 Enlarged view of section B in the middle.
[0030] Reference numerals: 1. Ring mesh box; 10. Ventilation opening; 11. Arc-shaped baffle; 2. Cement foundation; 20. Raised platform; 21. Waterproof groove; 22. Waterproof rubber; 23. Water passage hole; 3. Waterproof device; 30. Drive cylinder; 31. Water baffle; 32. Water level sensor; 4. Anti-theft device; 40. Fixing plate; 41. Anti-theft shell; 42. Connecting piece; 43. Fixing piece; 44. Padlock; 45. Water inlet hole. Detailed Implementation
[0031] The present application will be further described in detail below with reference to the accompanying drawings.
[0032] Example, refer to Figure 1 , Figure 2 A ring mains enclosure with emergency power failure protection includes a ring mains enclosure 1 and a concrete foundation 2. The ring mains enclosure 1 is fixedly connected to the upper surface of the concrete foundation 2. A ventilation opening 10 is provided at the bottom of the ring mains enclosure 1. Waterproof devices 3 are provided on both sides of the lower end inside the ring mains enclosure 1. The waterproof devices 3 include a drive cylinder 30 fixedly connected to both sides inside the ring mains enclosure 1, a baffle plate 31 fixedly connected to the output end of the drive cylinder 30, and a water level sensor 32 fixedly connected to the outside of the concrete foundation 2. The baffle plate 31 is used to block the ventilation opening 10 of the ring mains enclosure 1. The water level sensor 32 is signal-connected to the cylinder controller of the drive cylinder 30. The output end of the drive cylinder 30 faces downward. When rainwater is about to submerge the concrete foundation 2, the water level sensor 32 detects the water level signal and sends a start signal to the drive cylinder 30. The output end of the drive cylinder 30 pushes the baffle plate 31 to block the ring mains enclosure 1. The lower ventilation opening 10 prevents rainwater from overflowing the concrete foundation 2 and flowing into the cable well, thus preventing water accumulation and condensation that could cause the emergency power-off protection device to malfunction. Once the rainwater recedes, the water level sensor 32 sends a shutdown signal, driving the cylinder 30 to retract its output, allowing the baffle plate 31 to no longer block the ventilation opening 10 and enabling the ring network box 1 to ventilate and dehumidify normally. This solves the technical problem of the emergency power-off protection device potentially malfunctioning during heavy rain in existing technologies. Furthermore, the baffle plate 31 effectively prevents rainwater from flowing back into the cable well, preventing cable malfunctions due to rainwater immersion and improving the safety of personnel during maintenance of the ring network box 1. Additionally, an arc-shaped baffle plate 11 is fixedly installed on the upper outer side of the ventilation opening 10, preventing splashed rainwater from falling into the cable well.
[0033] Although the baffle plate 31 can prevent rainwater from entering the cable well, when the baffle plate 31 is pushed by the drive cylinder 30 to block the vent 10, because the baffle plate 31 needs to move up and down, there will be some small gaps between the baffle plate 31 and the side wall of the vent 10 of the ring network box 1. This allows rainwater to flow into the cable well through the gaps. Although the amount of water flowing in is not large, because the baffle plate 31 blocks the vent 10, the ventilation and dehumidification effect of the ring network box 1 is currently poor. In order to solve this technical problem, refer to Figure 3 In this embodiment, a raised platform 20 is fixed inside the cement foundation 2 to cooperate with the water baffle 31 for waterproofing. When the water baffle 31 is pushed down by the driving cylinder 30, it abuts against the raised platform 20, so that the end of the water baffle 31 away from the output end of the driving cylinder 30 presses the raised platform 20. This ensures that even if rainwater flows in through the gap between the water baffle 31 and the side wall of the ventilation opening 10 of the ring network box 1, it will be blocked by the raised platform 20, preventing rainwater from flowing into the cable well and improving the dryness of the ring network box 1.
[0034] Although the raised platform 20 can prevent rainwater from flowing into the cable well, in special circumstances, such as when the baffle 31 does not block the ventilation opening 10, pedestrians outside may accidentally kick small stones onto the raised platform 20. This can cause gaps between the baffle 31 and the raised platform 20 when the baffle 31 comes into contact with the raised platform 20, allowing rainwater to flow in. To solve this technical problem, this embodiment provides a waterproof groove 21 with the same shape as the baffle 31 on the side of the raised platform 20 near the baffle 31. A waterproof rubber 22 is fixed to the bottom of the waterproof groove 21. When the baffle 31 is driven by the cylinder 30... When pushed down, the baffle plate 31 extends into the waterproof groove 21 and presses the waterproof rubber 22. Because the waterproof rubber 22 is elastic, even if there are small stones on the waterproof rubber 22, other parts of the waterproof rubber 22 will bounce up to fill the gap. In this way, rainwater flowing into the raised platform 20 will not flow into the cable well, which improves the waterproof effect of the baffle plate 31 and the raised platform 20. In addition, a water passage hole 23 is opened on one side of the outside of the cement foundation 2, which extends to the side wall of the waterproof groove 21. The water passage hole 23 allows the rainwater accumulated in the waterproof groove 21 to flow out from the water passage hole 23, so that no water will remain on the raised platform 20, ensuring the dryness of the ring network box 1.
[0035] Although the waterproof device 3 can prevent rainwater from entering the cable well and affecting the dryness of the ring network box 1, the water level sensor 32, which needs to detect the water level, can only be installed on the outside of the concrete foundation 2. This makes the water level sensor 32, located on the outside of the concrete foundation 2, easy to steal. To solve this technical problem, refer to... Figure 4In this embodiment, an anti-theft device 4 is provided on one side of the water level sensor 32 to prevent the water level sensor 32 from being stolen. The anti-theft device 4 includes two opposing fixing plates 40, an anti-theft shell 41 located between the two fixing plates 40, a connecting piece 42, a fixing piece 43, and a padlock 44. The two fixing plates 40 are set at the upper and lower ends of one side of the water level sensor 32 and are fixedly connected to the cement foundation 2. One end of the anti-theft shell 41 is rotatably connected to the fixing plate 40, and the other end is fixedly connected to the connecting piece 42. The fixing piece 43 is fixedly set on the side of the water level sensor away from the fixing plate 40 and is fixedly connected to the cement foundation 2. The padlock 44 passes through the connecting piece 42 and the fixing piece 43 to lock the anti-theft shell 41. The anti-theft shell 41 is rotated to cover the water level sensor 32, and then the padlock 44 passes through the connecting piece 42 and the fixing piece 43 to lock the anti-theft shell 41. In this way, the water level sensor 32 can be prevented from being stolen, thus improving the anti-theft performance of the water level sensor 32.
[0036] Specific implementation process: When the rainwater is about to submerge the cement foundation 2, the water level sensor 32 detects the water level signal and sends a start signal to the drive cylinder 30. The output end of the drive cylinder 30 pushes the baffle plate 31, which extends into the waterproof groove 21 and presses the waterproof rubber 22. When the rainwater recedes, the water level sensor 32 sends a shut-off signal, and the drive cylinder 30 retracts its output end, so that the baffle plate 31 no longer blocks the ventilation opening 10, allowing the ring network box 1 to ventilate and dehumidify normally.
[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. Ring main unit with emergency power-off protection, comprising a ring main unit (1) and a cement base (2), characterized in that The ring network box (1) is fixedly connected to the upper surface of the cement foundation (2). The bottom of the ring network box (1) is provided with a ventilation opening (10). Waterproof devices (3) are provided on both sides of the lower end of the ring network box (1). The waterproof device (3) includes a drive cylinder (30) fixedly connected inside the ring network box (1), a baffle plate (31) fixedly connected to the output end of the drive cylinder (30), and a water level sensor (32) fixedly connected to the outside of the cement foundation (2). The baffle plate (31) is used to block the ventilation opening (10) of the ring network box (1). The water level sensor (32) is connected to the cylinder controller of the drive cylinder (30). The output end of the drive cylinder (30) faces downward.
2. The ring main unit with emergency power-off protection according to claim 1, characterized in that, The inner side of the cement foundation (2) is fixed with a raised platform (20) for waterproofing in conjunction with the water baffle (31).
3. The ring main unit with emergency power-off protection according to claim 2, characterized in that, The raised platform (20) has a waterproof groove (21) with the same shape as the water baffle (31) on the side near the water baffle (31), and a waterproof rubber (22) is fixedly provided on the bottom surface of the waterproof groove (21).
4. A ring main unit with emergency power failure protection according to claim 1, characterized in that, A water passage hole (23) is provided on one side of the cement foundation (2) to penetrate to the side wall of the waterproof groove (21).
5. The ring main unit with emergency power-off protection according to claim 1, characterized in that, The water level sensor (32) is provided with an anti-theft device (4) on one side to prevent the water level sensor (32) from being stolen.
6. The ring main unit with emergency power-off protection according to claim 5, characterized in that, The anti-theft device (4) includes two opposing fixed plates (40), an anti-theft shell (41) located between the two fixed plates (40), a connecting piece (42), a fixing piece (43), and a padlock (44). The two fixed plates (40) are set at the upper and lower ends on one side of the water level sensor (32) and fixedly connected to the cement foundation (2). One end of the anti-theft shell (41) is rotatably connected to the fixed plate (40), and the other end is fixedly connected to the connecting piece (42). The fixing piece (43) is set on the side of the water level sensor away from the fixed plate (40) and fixedly connected to the cement foundation (2). The padlock (44) passes through the connecting piece (42) and the fixing piece (43) to lock the anti-theft shell (41).
7. The ring main unit with emergency power-off protection according to claim 6, characterized in that, The anti-theft shell (41) has a water inlet hole (45) on the side away from the cement foundation (2).
8. The ring main unit with emergency power-off protection according to claim 1, characterized in that, An arc-shaped baffle (11) is fixedly provided on the upper outer side of the ventilation opening (10).