A ring main unit

Abstract

The utility model discloses a kind of ring main unit, it is related to ring main unit technical field, including cabinet, first fixed block is fixedly installed in cabinet two sides, spring is fixedly connected between pressing plate and the gas storage box, spring is located the outside of movable rod, the outside of first fixed block is equipped with multiple second heat dissipation holes, the outside of gas guide pipe is fixedly connected with protective frame, the bottom of gas storage box is fixedly connected with air inlet pipe.The utility model gas storage box, barometer and unique structure design can accurately judge the saturation state of drying agent, replace drying agent in time, according to replacement time, absorption water vapor weight etc. Data, accurately analyze environmental humidity, and then accurately adjust drying agent filling amount, avoid waste and drying deficiency, greatly improve drying efficiency, maintain the stable drying environment inside cabinet, in addition, fan auxiliary acceleration air flow, further reduce the water vapor content inside cabinet, synergistic drying agent improves overall drying effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of ring main unit protection equipment, specifically a ring main unit. Background Technology

[0002] A ring main unit (RNU) is an electrical device consisting of a set of power transmission and distribution equipment housed in a metal or non-metal insulated cabinet or assembled into a modular ring network power supply unit. Its core components include load switches and fuses. It is widely used in substations and prefabricated substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories. RNUs typically use a ring network power supply method, where multiple RNUs are connected by cables to form a ring power supply network. In this ring network, each RNU can obtain power from adjacent RNUs or transmit power to adjacent RNUs.

[0003] The electrical equipment inside the ring main unit relies on good insulation materials to ensure its normal operation and the safety of the operators. When humid air enters the ring main unit, moisture will adhere to the surface of the insulation material, reducing its insulation resistance. For example, when the insulation bushing and busbar insulation layer are damp, their insulation performance will be significantly reduced, which can easily lead to leakage. This will not only cause power loss, but may also lead to short circuits in electrical equipment, causing tripping, power outages and other faults. In severe cases, it may even damage the equipment and affect the normal operation of the power system.

[0004] Some existing drying devices use a simple desiccant adsorption method. The desiccant has a small adsorption capacity. When the ambient humidity of the ring main unit is high or the water vapor inside the unit is generated quickly, the desiccant will quickly reach adsorption saturation and lose its dehumidification ability. It will not be able to continuously and effectively reduce the humidity inside the unit, resulting in a humid environment inside the unit, which will affect the normal operation of the electrical equipment. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a ring main unit, which solves the problem that some existing drying devices use a simple desiccant adsorption method. The desiccant has a small adsorption capacity. When the humidity of the environment where the ring main unit is located is high or the water vapor in the unit is generated quickly, the desiccant will quickly reach the adsorption saturation state and lose its dehumidification ability. It cannot continuously and effectively reduce the air humidity in the unit, resulting in the unit still being in a humid environment, which affects the normal operation of electrical equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ring main unit, comprising a cabinet body, with first fixing blocks fixedly installed on both sides of the cabinet body, a storage box snapped into the first fixing blocks, the storage box being filled with desiccant, and an air storage box fixedly connected to the bottom of the first fixing blocks, a movable rod extending through the top of the air storage box, a pressure plate fixedly connected to the top of the movable rod, a piston plate fixedly connected to the bottom of the movable rod, the piston plate being located inside the air storage box, the storage box being located above the pressure plate, an air guide pipe being connected to the bottom of the air storage box, a pressure detector being fixedly connected between the air guide pipes, a spring being fixedly connected between the pressure plate and the air storage box, the spring being located outside the movable rod, multiple sets of second heat dissipation holes being opened on the outside of the first fixing blocks, a protective frame being fixedly connected to the outside of the air guide pipes, and an air inlet pipe being fixedly connected to the bottom of the air storage box.

[0007] As a further embodiment of this utility model: the cabinet has first sliding grooves on both sides for use with the storage box, the top of the storage box is fixedly connected to a sealing plate by bolts, and a limit block is fixedly connected to the outside of the storage box. The limit block has a U-shaped structure, and the inner side of the first fixed block has a second sliding groove for use with the limit block.

[0008] As a further embodiment of this utility model: a second fixing block is fixedly installed at both ends of the cabinet in a symmetrical structure, a fan is fixedly connected inside the second fixing block, multiple sets of air inlets are opened on the outer side of the second fixing block to cooperate with the fan, and a dustproof net is connected to the inner side of the second fixing block to cooperate with the air inlets.

[0009] As a further embodiment of this utility model: a ventilation plate for use with the fan is installed at the bottom of the cabinet, a base is fixedly connected to the bottom of the cabinet, and first heat dissipation holes are provided on both sides of the base.

[0010] As a further embodiment of this utility model: a rain shelter is installed on the top of the cabinet, the rain shelter is fixed to the top of the second fixing block, and a cabinet door is rotatably connected to the front of the cabinet.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. Through the air storage box, air pressure detector and unique structural design, the saturation state of the desiccant can be accurately determined, and the desiccant can be replaced in time. At the same time, based on data such as replacement time and weight of absorbed water vapor, the ambient humidity can be accurately analyzed, and the amount of desiccant filled can be precisely adjusted to avoid waste and insufficient drying, which greatly improves drying efficiency and maintains a stable drying environment inside the cabinet. In addition, the fan helps to accelerate air flow, further reducing the moisture content inside the cabinet, and working with the desiccant to improve the overall drying effect.

[0013] 2. The storage box is extremely easy to install and disassemble thanks to the combination of the sliding groove and the limiting block. In particular, the U-shaped limiting block, which is similar to a handle, greatly reduces the difficulty of operation and improves maintenance efficiency. At the same time, the dustproof net, rainproof canopy and stable base equipped with the cabinet provide all-round protection for the equipment from the perspectives of dust prevention, waterproofing and enhanced stability, reducing the risk of failure, extending the service life of the equipment and reducing the frequency and cost of maintenance. Attached Figure Description

[0014] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the cabinet of this utility model;

[0017] Figure 4 This is a first-view schematic diagram of the cross-sectional structure of this utility model;

[0018] Figure 5 This is a second-view schematic diagram of the cross-sectional structure of this utility model;

[0019] Figure 6 This is a schematic diagram showing the disassembly effect of the main structure of this utility model.

[0020] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Rain cover; 4. Base; 5. First heat dissipation hole; 6. First fixing block; 7. Sealing plate; 8. Limiting block; 9. First slide groove; 10. Second heat dissipation hole; 11. Protective frame; 12. Air pressure detector; 13. Storage box; 14. Pressure plate; 15. Air storage box; 16. Ventilation plate; 17. Air inlet pipe; 18. Second fixing block; 19. Fan; 20. Dustproof net; 21. Air inlet; 22. Spring; 23. Movable rod; 24. Air guide pipe; 25. Second slide groove. Detailed Implementation

[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0022] like Figures 1-6 As shown, this utility model provides a ring main unit technical solution:

[0023] The system includes a cabinet 1, with first fixing blocks 6 fixedly installed on both sides of the cabinet 1. A storage box 13 is snapped into the first fixing block 6 and filled with desiccant. An air storage box 15 is fixedly connected to the bottom of the first fixing block 6. A movable rod 23 is movably passed through the top of the air storage box 15. A pressure plate 14 is fixedly connected to the top of the movable rod 23 and a piston plate is fixedly connected to the bottom of the movable rod 23. The piston plate is located inside the air storage box 15, and the storage box 13 is located above the pressure plate 14. An air guide pipe 24 is connected to the bottom of the air storage box 15. A pressure detector 12 is fixedly connected between the air guide pipes 24. A spring 22 is fixedly connected between the pressure plate 14 and the air storage box 15, and the spring 22 is located outside the movable rod 23. Multiple sets of second heat dissipation holes 10 are opened on the outside of the first fixing block 6. A protective frame 11 is fixedly connected to the outside of the air guide pipe 24. An air inlet pipe 17 is fixedly connected to the bottom of the air storage box 15.

[0024] Specifically, the storage box 13 is filled with dry desiccant and is snapped into the first fixing block 6 to absorb moisture from the air inside the cabinet 1. At this time, the spring 22 is in a naturally extended state, and the pressure plate 14 and piston plate are in a relatively high position. The gas in the air storage box 15 is at normal pressure. As time goes by, the outer surface of the storage box 13 has a filter structure, so the desiccant continuously absorbs moisture from the air inside the cabinet 1 and gradually becomes saturated. When the desiccant completely absorbs moisture, its weight increases, and the increased weight of the desiccant drives the pressure plate 14 to absorb moisture from the air inside the cabinet 1. 4. Moving downwards, the pressure plate 14 causes the piston plate to move downwards within the air storage box 15 via the movable rod 23, compressing the gas inside the air storage box 15. The compressed gas is then transmitted through the bottom air guide pipe 24. The air pressure detector 12 between the air guide pipes 24 monitors the gas pressure in real time. When the detected air pressure exceeds the normal range, it indicates that the desiccant is saturated. When the increased weight causes the piston plate to press down, changing the air pressure, it can be determined that the desiccant has completely absorbed moisture and lost its effectiveness. Once the desiccant is confirmed to be ineffective, the storage box 1 is removed. 3. Replace the desiccant. After replacement, due to the elasticity of spring 22, pressure plate 14 and piston plate return to their original positions, the air pressure in air storage box 15 returns to normal, and air inlet pipe 17 replenishes an appropriate amount of air to maintain system air pressure balance. The device enters the next working cycle. During this process, the second heat dissipation hole 10 on the outside of the first fixing block 6 continuously dissipates the heat generated by gas compression, and the protective frame 11 protects the air guide pipe 24 from external damage. At the same time, by recording and analyzing the time of desiccant replacement, desiccant expiration time, and the weight of water vapor absorbed, the humidity of the environment where the ring main unit is located can be accurately understood. For example, if the desiccant reaches the expiration state in a short time and absorbs a lot of water vapor, it indicates that the ambient humidity is high; conversely, the humidity is low. Based on these data, the filling amount of the new desiccant can be precisely adjusted so that the moisture absorption capacity of the desiccant matches the actual humidity. This can avoid waste caused by overfilling the desiccant and prevent underfilling from failing to effectively reduce humidity, thereby improving the efficiency of desiccant use.

[0025] The cabinet 1 has first sliding grooves 9 on both sides for use with storage box 13. The top of storage box 13 is fixedly connected to sealing plate 7 by bolts, and limit block 8 is fixedly connected to the outside of storage box 13. Limit block 8 has a U-shaped structure. The inner side of first fixing block 6 has second sliding groove 25 for use with limit block 8.

[0026] Specifically, the first slide 9 and the second slide 25 provide precise guidance for the installation of the storage box 13, enabling the storage box 13 to be quickly and accurately inserted between the cabinet 1 and the first fixing block 6. The staff only needs to align the storage box 13 along the first slide 9, and then use the cooperation of the limiting block 8 and the second slide 25 to easily install the storage box 13 into place, which greatly improves the efficiency and accuracy of the installation. The handle-like design at the end of the U-shaped limiting block 8 provides a convenient point of force for the staff. During installation, the staff can hold the end of the limiting block 8 to push the storage box 13 into the slide more easily; during disassembly, the storage box 13 can also be pulled out by holding the limiting block 8, reducing the difficulty of operation, especially inside the cabinet 1 where the space is limited, making it easier for the staff to operate. The sealing plate 7 on the top of the storage box 13 can effectively prevent external dust from entering the storage box 13.

[0027] The cabinet 1 has two symmetrically fixed second fixing blocks 18 at both ends. A fan 19 is fixedly connected inside the second fixing block 18. Multiple air inlets 21 are opened on the outside of the second fixing block 18 to cooperate with the fan 19. A dustproof net 20 is connected to the inside of the second fixing block 18 to cooperate with the air inlets 21. A ventilation plate 16 is installed at the bottom of the cabinet 1 to cooperate with the fan 19. A base 4 is fixedly connected to the bottom of the cabinet 1. First heat dissipation holes 5 are opened on both sides of the base 4. A rain shelter 3 is installed on the top of the cabinet 1. The rain shelter 3 is fixed to the top of the second fixing block 18. A cabinet door 2 is rotatably connected to the front of the cabinet 1.

[0028] Specifically, the fans 19 symmetrically installed at both ends of the cabinet 1, together with the ventilation plate 16 at the bottom and the first heat dissipation holes 5 on both sides of the base 4, form an effective air circulation channel. The fans 19 draw in external air through the air inlet 21, and after passing through the inside of the cabinet 1, they are discharged from the ventilation plate 16 and the heat dissipation holes. This can quickly remove the heat generated by the equipment inside the cabinet 1, preventing the equipment from degrading or being damaged due to overheating, ensuring stable operation of the equipment, and extending its service life. When the fans 19 are running, they can make the air flow rapidly, breaking the relatively static state of water vapor inside the cabinet 1, allowing water vapor molecules to diffuse more evenly in the air. Water vapor that was originally concentrated in certain areas will be dispersed, reducing the local water vapor concentration and creating more favorable conditions for water vapor discharge. By promoting the exchange of air inside the cabinet 1 with the relatively dry air outside, the air containing more water vapor is discharged from the cabinet 1, while relatively dry air is introduced. The dry air reduces the overall moisture content inside the cabinet 1. A dustproof net 20 is installed at the air inlet 21 on the outside of the second fixing block 18 to block dust and debris from entering the cabinet 1, preventing them from accumulating on the equipment and affecting heat dissipation and normal operation, reducing the risk of equipment failure, and reducing the frequency of cleaning and maintenance. A rain shelter 3 is installed on top of the cabinet 1 to effectively prevent rainwater from directly hitting the cabinet 1, preventing rainwater from entering the cabinet 1 and causing problems such as short circuits and corrosion, thus improving the safety and stability of the equipment in harsh weather. The cabinet door 2, which is connected to the front of the cabinet 1 by rotation, allows staff to open it at any time to install, debug, repair, and inspect the equipment inside the cabinet 1, improving work efficiency. The base 4 is fixedly connected to the bottom of the cabinet 1, which enhances the stability of the cabinet 1, making it more stable when placed, less prone to shaking or tipping, and providing reliable support for the internal equipment.

[0029] The working principle of this utility model is as follows:

[0030] First, the storage box 13 is engaged with the second slide 25 on the first fixing block 6 through the first slide 9 and the limiting block 8, and is snapped into the first fixing blocks 6 on both sides of the cabinet 1. The sealing plate 7 on the top of the storage box 13 prevents external dust from entering. The desiccant filled inside absorbs moisture from the air inside the cabinet 1 through the filter structure on the outer surface. In the initial state, the spring 22 is in a naturally extended state, the pressure plate 14 and the piston plate are in a relatively high position, and the gas in the air storage box 15 is at normal pressure. As time goes by, the desiccant continuously absorbs moisture from the air inside the cabinet 1 and gradually becomes saturated.

[0031] Secondly, when the desiccant completely absorbs moisture, its weight increases, causing the pressure plate 14 to move downwards. The pressure plate 14, through the movable rod 23, causes the piston plate to move downwards within the air storage box 15, compressing the gas inside the air storage box 15. After the gas inside the air storage box 15 is compressed, it is transmitted through the bottom air guide pipe 24. The air pressure detector 12 between the air guide pipes 24 detects the gas pressure in real time. When the detected air pressure exceeds the normal range, it indicates that the desiccant is saturated. The increased weight causes the piston plate to press down, changing the air pressure. At this point, it can be determined that the desiccant has completely lost its moisture absorption function.

[0032] Furthermore, by recording and analyzing the time of desiccant replacement, desiccant expiration time, and the weight of absorbed moisture, the humidity of the environment where the ring main unit is located can be accurately understood. If the desiccant reaches its expiration state in a short time and absorbs a lot of moisture, it indicates that the ambient humidity is high; conversely, the humidity is low. Based on this data, the amount of new desiccant can be precisely adjusted to match the moisture absorption capacity of the desiccant with the actual humidity conditions, thereby improving the efficiency of desiccant use.

[0033] It is worth mentioning that the fans 19 symmetrically installed at both ends of the cabinet 1 draw in external air through the air inlet 21 on the outside of the second fixing block 18. The dustproof net 20 at the air inlet 21 blocks dust and debris from entering. After the air passes through the inside of the cabinet 1, it is discharged from the ventilation plate 16 at the bottom and the first heat dissipation holes 5 on both sides of the base 4, forming an effective air circulation channel. This quickly removes the heat generated by the equipment inside the cabinet 1, preventing the equipment from degrading or being damaged due to overheating. At the same time, the operation of the fans 19 accelerates the air flow, allowing water vapor molecules to diffuse more evenly in the air, reducing the local water vapor concentration, and promoting the exchange between the humid air inside the cabinet 1 and the relatively dry air outside, thereby reducing the overall water vapor content inside the cabinet 1.

[0034] Finally, the rain shelter 3 installed on top of the cabinet 1 is fixed to the top of the second fixing block 18, which can effectively block rainwater from directly hitting the cabinet 1, preventing rainwater from entering the cabinet 1 and causing problems such as short circuits and corrosion of the equipment, thus improving the safety and stability of the equipment under severe weather conditions. The cabinet door 2 connected to the front of the cabinet 1 can be opened at any time by the staff to perform installation, debugging, maintenance and inspection of the equipment inside the cabinet 1. The base 4 fixedly connected to the bottom of the cabinet 1 enhances the stability of the cabinet 1, making it more stable and less prone to shaking or tipping.

[0035] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A ring main unit, comprising a cabinet (1), characterized in that: The cabinet (1) is fixedly installed with first fixing blocks (6) on both sides. A storage box (13) is snapped into the first fixing block (6). The storage box (13) is filled with desiccant. An air storage box (15) is fixedly connected to the bottom of the first fixing block (6). A movable rod (23) is movably passed through the top of the air storage box (15). A pressure plate (14) is fixedly connected to the top of the movable rod (23). A piston plate is fixedly connected to the bottom of the movable rod (23). The piston plate is located inside the air storage box (15). The storage box (13) is located inside the pressure plate. Above the plate (14), the bottom of the gas storage box (15) is connected to a gas guide pipe (24), and a gas pressure detector (12) is fixedly connected between the gas guide pipes (24). A spring (22) is fixedly connected between the pressure plate (14) and the gas storage box (15), and the spring (22) is located outside the movable rod (23). Multiple sets of second heat dissipation holes (10) are opened on the outside of the first fixed block (6). A protective frame (11) is fixedly connected to the outside of the gas guide pipe (24), and an air inlet pipe (17) is fixedly connected to the bottom of the gas storage box (15).

2. A ring main unit according to claim 1, characterized in that: The cabinet (1) has first grooves (9) on both sides for use with the storage box (13). The top of the storage box (13) is fixedly connected to a sealing plate (7) by bolts. The storage box (13) is fixedly connected to a limiting block (8) on the outside. The limiting block (8) has a U-shaped structure. The inner side of the first fixing block (6) has a second groove (25) for use with the limiting block (8).

3. A ring main unit according to claim 1, characterized in that: The cabinet (1) has a second fixing block (18) fixedly installed at both ends in a symmetrical structure. A fan (19) is fixedly connected inside the second fixing block (18). Multiple sets of air inlets (21) are opened on the outside of the second fixing block (18) to cooperate with the fan (19). A dustproof net (20) is connected to the inside of the second fixing block (18) to cooperate with the air inlets (21).

4. A ring main unit according to claim 3, characterized in that: The bottom of the cabinet (1) is equipped with a ventilation plate (16) for use with the fan (19), and a base (4) is fixedly connected to the bottom of the cabinet (1). The base (4) has first heat dissipation holes (5) on both sides.

5. A ring main unit according to claim 3, characterized in that: A rain shelter (3) is installed on the top of the cabinet (1), and the rain shelter (3) is fixed to the top of the second fixing block (18). A cabinet door (2) is rotatably connected to the front of the cabinet (1).

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