A rear outgoing line type ring main unit for smart grid power distribution

Abstract

The application relates to a rear outgoing line type ring main unit for power distribution of a smart grid, and relates to the technical field of the ring main unit. The ring main unit comprises a cabinet body, a wiring terminal group arranged on the cabinet body, an isolation knife group, a vacuum circuit breaker, a permanent magnet mechanism, an isolation mechanism, an auxiliary mechanism and an alarm mechanism for driving the isolation mechanism to alarm, and a heat dissipation mechanism arranged on the cabinet body and used for synchronously dissipating heat of the isolation knife group, the vacuum circuit breaker and the permanent magnet mechanism; the heat dissipation mechanism comprises a heat dissipation box fixed in the cabinet body, a connecting pipe communicated with the heat dissipation box, three heat dissipation pipes communicated with the connecting pipe, a blowing assembly used for blowing air in the three heat dissipation pipes, air volume assemblies respectively used for adjusting air volume in the three heat dissipation pipes and a temperature control assembly used for adjusting air temperature. The application can control heat dissipation levels of the isolation knife group, the vacuum circuit breaker and the permanent magnet mechanism according to different driving temperatures of the isolation knife group, the vacuum circuit breaker and the permanent magnet mechanism and weather temperatures outside the ring main unit.

Description

Technical Field

[0001] This application relates to the technical field of ring main units, and in particular to a rear-outgoing ring main unit for smart grid power distribution. Background Technology

[0002] A ring main unit is an electrical equipment unit that installs high-voltage switchgear in a steel plate metal cabinet or an assembled compartment structure, and is widely used in power supply systems.

[0003] Ring main units are divided into a cable compartment and an operating compartment. In order to reduce the area occupied by the ground, traditional ring main units usually place the cable compartment on the bottom side of the ring main unit, while the operating compartment is located on the top side. For example, Chinese patent with publication number CN114362025A proposes a ring main unit with a first functional circuit switch and a second functional circuit switch arranged along a first direction. The bottom of the first functional circuit switch and the side of the second functional circuit switch form an arrangement space, and the top of the second functional circuit switch and the side of the first functional circuit switch form another arrangement space. These two arrangement spaces can meet the distance requirements between the first functional circuit switch and the ground and between the two switches when setting the first functional circuit switch and the second functional circuit switch, thus reducing the width of the ring main unit.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: Arranging the cable compartment and control room of the ring main unit vertically results in a high ceiling for the ring main unit. When installed on either side of the street, this can easily obstruct the side view of pedestrians and vehicles, requiring them to be extra cautious when passing the ring main unit, causing inconvenience. Furthermore, placing the control room above the cable compartment causes hot air from the cable compartment to rise naturally, affecting the heat dissipation efficiency of the control room. Additionally, sparks generated in the cable compartment can quickly spread to the control room, increasing the risk of overall damage to the ring main unit. Summary of the Invention

[0005] To address the issues that existing ring main unit (RNU) systems, which use a vertical arrangement of the cable compartment and control room, resulting in a high RNU height that can obstruct the side view of pedestrians and vehicles when installed on either side of a street, and the varying heat dissipation requirements of different components within the RNU, where simultaneous cooling of all components by the cooling system can lead to insufficient cooling for some and excessive cooling for others, this application provides a rear-outgoing RNU for smart grid power distribution.

[0006] The technical solution provided in this application for a rear-outgoing ring main unit for smart grid power distribution adopts the following:

[0007] A smart grid distribution rear-outlet ring main unit includes a cabinet, a terminal block, a disconnector block, a vacuum circuit breaker, a permanent magnet mechanism, an isolation mechanism, and an auxiliary mechanism mounted on the cabinet, as well as an alarm mechanism for driving the isolation mechanism to trigger an alarm. The cabinet is equipped with a heat dissipation mechanism for synchronously cooling the disconnector block, the vacuum circuit breaker, and the permanent magnet mechanism.

[0008] The heat dissipation mechanism includes a heat dissipation box fixed inside the cabinet, a connecting pipe connected to the heat dissipation box, three heat dissipation pipes connected to the connecting pipe, a blower assembly for blowing air into the three heat dissipation pipes, an air volume assembly for adjusting the air volume in the three heat dissipation pipes respectively, a temperature control assembly for adjusting the air temperature, and a drying assembly for drying the air.

[0009] The blowing assembly includes multiple fan blades rotatably disposed within the heat sink and a synchronizing element for synchronously driving the multiple fan blades to rotate.

[0010] The air volume component includes an adjustment plate that is movably mounted on three heat dissipation pipes and a lifting component for driving the adjustment plate to rise and fall.

[0011] The temperature control component includes a grid tube fixed inside the heat dissipation box, a cooler for cooling the liquid inside the grid tube, a drive for timing the cooler, and a heat dissipation component for cooling the cooler.

[0012] By adopting the above technical solutions, the optimal operating temperature range in the ring main unit is usually between 10℃ and 35℃. Within this temperature range, the performance of components such as isolating knife groups, vacuum circuit breakers, and permanent magnet mechanisms in the ring main unit can be guaranteed to be stable and the aging rate of components can be normal. If the temperature inside the ring main unit is continuously maintained between 0℃ and 10℃, the lubricating grease on components such as isolating knife groups, vacuum circuit breakers, and permanent magnet mechanisms will solidify, resulting in increased mechanical operating resistance, mechanical jamming, poor contact of contacts, and affecting the performance of components such as isolating knife groups, vacuum circuit breakers, and permanent magnet mechanisms. If the temperature inside the ring main unit is continuously maintained above 35℃, the aging of components such as isolating knife groups, vacuum circuit breakers, and permanent magnet mechanisms will be accelerated, affecting the service life of components such as isolating knife groups, vacuum circuit breakers, and permanent magnet mechanisms.

[0013] The heat dissipation requirements of the isolating switch group, vacuum circuit breaker, and permanent magnet mechanism in a ring main unit are different. If the heat dissipation mechanism heats the isolating switch group, vacuum circuit breaker, and permanent magnet mechanism at the same level, it will lead to the risk of insufficient heat dissipation of the isolating switch group and the risk of excessive heat dissipation of the vacuum circuit breaker and permanent magnet mechanism, which will affect the performance of the isolating switch group, vacuum circuit breaker, and permanent magnet mechanism. The main heat source of the vacuum circuit breaker is the electric arc plus contact resistance, the main heat source of the isolating switch group is the contact resistance, and the main heat source of the permanent magnet mechanism is the coil plus eddy current. Therefore, when the isolating switch group, vacuum circuit breaker, and permanent magnet mechanism are driven, the vacuum circuit breaker generates the most heat, followed by the isolating switch group, and the permanent magnet mechanism generates the least heat. Therefore, when the isolating switch group, vacuum circuit breaker, and permanent magnet mechanism are heat-dissipated at the same level, the airflow level needs to be adjusted according to the heat of each part of the isolating switch group, vacuum circuit breaker, and permanent magnet mechanism to avoid the risk of insufficient or excessive heat dissipation.

[0014] Meanwhile, the ring main unit is installed on the street, and the temperature of the heat dissipation mechanism for the isolating knife group, vacuum circuit breaker and permanent magnet mechanism needs to be adjusted according to the weather. Because the ring main unit is waterproof and the cabinet is usually metal and sealed, the temperature of the outside of the ring main unit will indirectly affect the internal temperature. Therefore, in the hot weather, while the isolating knife group, vacuum circuit breaker and permanent magnet mechanism are dissipated at the same time, the temperature of the heat dissipation gas needs to be reduced to avoid the temperature inside the cabinet from aggravating and exceeding the tolerance limit of each component. In the cold weather, the synchronous heat dissipation of the isolating knife group, vacuum circuit breaker and permanent magnet mechanism needs to be reduced. At the same time, the inside of the cabinet needs to be dried to avoid the normal operation of each component due to moisture inside the cabinet.

[0015] The alarm mechanism allows operators to easily trigger an alarm or cut off power to the ring main unit (RNB) when the voltage of the RNB or permanent magnet mechanism exceeds the limit or the internal temperature of the RNB reaches the limit. The heat dissipation mechanism can dissipate heat from the main heat-generating components in the RNB, such as the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism. It can also control the airflow in the three heat dissipation pipes according to the heat generated by the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism, and can control the airflow temperature according to the ambient temperature. In high temperatures, the airflow temperature can be reduced, and in high humidity conditions, the airflow can be dried.

[0016] Optionally, the synchronizing element includes a plurality of first bevel gears, a plurality of second bevel gears, and a rotating shaft rotatably disposed within the heat dissipation box, and a motor fixed to the cabinet. The plurality of fan blades are respectively coaxially fixed with the plurality of first bevel gears, the plurality of first bevel gears are respectively meshed with the plurality of second bevel gears, the plurality of second bevel gears are all fixedly connected to the rotating shaft, and the rotating shaft is fixedly connected to the output shaft of the motor.

[0017] By adopting the above technical solution, the synchronizing component can provide cooling by blowing air onto the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism. The motor can sequentially drive the rotating shaft, multiple second bevel gears, multiple first bevel gears, and multiple fan blades to generate strong airflow. The airflow can be blown into the cabinet through the heat dissipation box, connecting pipe, and three heat dissipation pipes. The three heat dissipation pipes will first blow the airflow onto the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism respectively for cooling. At the same time, the airflow will circulate and circulate within the cabinet, which can also provide cooling for other components inside the cabinet.

[0018] Optionally, the lifting component includes a fixing block fixed to three heat dissipation pipes, an adjusting block fixed inside the fixing block, and a connecting rod fixed to the adjusting block. The three connecting rods are fixedly connected to three adjusting plates. An air passage gap is provided between the adjusting plate and the heat dissipation pipe. The three fixing blocks are respectively connected to the isolating knife group, the vacuum circuit breaker, and the permanent magnet mechanism.

[0019] By adopting the above technical solution, the lifting component can detect the temperature of the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism. Based on the temperature, the airflow on the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism is controlled respectively. The heat from the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism is conducted to the three fixed blocks, which are then heated. The heat is then conducted to the three adjusting blocks, which expand due to the high temperature. Through the expansion and contraction of the adjusting blocks, the connecting rod and adjusting plate are moved in sequence, which can adjust the size of the air gap. The higher the temperature of the adjusting block, the greater its expansion, the larger the air gap, and the more airflow from the heat dissipation pipe. The heat driven by the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism can be used to control the airflow from the three heat dissipation pipes.

[0020] Optionally, the driving component includes a photovoltaic panel and a battery mounted on the cabinet, a cooling pipe fixed to the cooler, a heating block fixed to the cabinet, a driving block fixed to the heating block, a connecting block fixed to the driving block, an inductive switch mounted on the battery, and a cooling pipe fixed to the cooler. The photovoltaic panel and the cooler are electrically connected to the battery, the cooler is fixedly connected to the cabinet, the cooling pipe is located inside the mesh tube, and the connecting block is movably fitted with the inductive switch.

[0021] By adopting the above technical solution, the drive unit can detect the ambient temperature and the external temperature of the cabinet. It can control the airflow temperature on the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism according to the ambient temperature. When the ambient temperature is high, the heat from the outside of the cabinet will be conducted to the heated block and then to the drive block. The drive block will expand due to the high temperature. Through the expansion and contraction of the drive block, the connecting block will move and come into contact with the inductive switch on the battery, thus driving the battery. It can also drive the cooler to cool the cooling pipe, cool the liquid in the grid tube, and generate cold air on the outside of the grid tube. The airflow can then disperse the cold air on the outside of the grid tube to form a cool breeze, which can further enhance the heat dissipation efficiency of the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism in the ring main unit when the temperature is high.

[0022] Optionally, the drying assembly includes a desiccant box fixed inside the heat dissipation box, a sealing cover slidably disposed on the desiccant box, and a smart push rod fixed on the sealing cover. The smart push rod is fixedly connected to the heat dissipation box. The sealing cover has equidistantly arranged air vents, and the desiccant box has equidistantly arranged connection holes. The multiple air vents are respectively movably fitted with the multiple connection holes. A humidity sensor is installed inside the cabinet, and the humidity sensor is electrically connected to the smart push rod.

[0023] By adopting the above technical solution, the drying component can perform drying treatment when the humidity inside the cabinet is high. The humidity sensor detects the humidity inside the cabinet. When the humidity inside the cabinet is high, the intelligent push rod can drive the sealing cover to move, so that the multiple air outlets on the sealing cover correspond to the multiple connection holes on the desiccant box, which can open the desiccant box. When the airflow is strong, the desiccant in the desiccant box can be quickly dispersed, which can dry the isolating knife group, vacuum circuit breaker and permanent magnet mechanism inside the ring network cabinet while dissipating heat. At the same time, when the inside of the cabinet is relatively dry, the desiccant box can be completely closed, which can save the use of desiccant.

[0024] Optionally, the heat sink includes a fixed cover fixed to the heat sink box, and the leftmost fan blade among the plurality of fan blades is a heat sink blade. The cooler and the heat sink blade are both located inside the fixed cover.

[0025] By adopting the above technical solution, the heat dissipation component can efficiently dissipate heat from the cooler. When the synchronizing component drives the heat dissipation blades to rotate, the generated airflow will flow in the fixed cover, thereby dissipating heat from the cooler, ensuring the driving effect of the cooler and enabling the cooler to work continuously.

[0026] Optionally, the cabinet is provided with a cable compartment and an operating compartment. The isolating knife group, vacuum circuit breaker and permanent magnet mechanism are all located in the operating compartment. The connection end of the terminal group and the isolating knife group is located in the operating compartment, and the terminal end of the terminal group is located in the cable compartment.

[0027] By adopting the above technical solution, the cable compartment and the operating room of the cabinet are arranged in a left-right configuration, which can free up space in the height of the cabinet and avoid obstructing the view of vehicles and pedestrians on the street due to the cabinet being too tall. At the same time, the high voltage and low voltage of the cabinet can be completely separated, which can improve the safety performance of the operators.

[0028] Optionally, the alarm mechanism includes a connecting frame slidably mounted on the auxiliary mechanism, a movable frame slidably mounted on the isolation mechanism, a movable component for raising and lowering the connecting frame, a translation component for raising and lowering the movable frame, and a connecting component.

[0029] The movable component includes a movable handle rotatably mounted on the auxiliary mechanism, and both the isolation mechanism and the movable handle are movably fitted with the connecting frame.

[0030] By adopting the above technical solution, the alarm mechanism can trigger an alarm when the voltage of the permanent magnet mechanism exceeds the limit, and can also trigger an alarm and power-off action when the operator is operating the ring main unit or when the internal temperature of the ring main unit reaches the limit.

[0031] The movable part can trigger an alarm when the voltage of the permanent magnet mechanism exceeds the limit. The permanent magnet mechanism can drive the movable handle to move the connecting frame along the auxiliary mechanism, so that the connecting frame can contact the trigger on the isolation mechanism, thereby triggering an alarm for the ring main unit.

[0032] Optionally, the translation component includes a support frame and a sliding rod slidably mounted on the cabinet, a telescopic spring fixed to the movable frame, and a movable rod hinged to the sliding rod. A threaded rod is threadedly connected to the cabinet, and the threaded rod is movably fitted with the support frame. Both the support frame and the movable frame are provided with arc surfaces. The sliding rod is movably fitted with the arc surface of the support frame, and the movable rod is movably fitted with the arc surface of the movable frame. The telescopic spring is fixedly connected to the isolation mechanism.

[0033] By adopting the above technical solution, the translation component allows the operator to perform circuit breaking when operating the terminal block. By rotating the threaded rod to make it rotate downward, the support frame can move downward along the cabinet, causing the support frame to lose its clamping force on the sliding rod. Through the elastic force of the telescopic spring, the movable frame can be driven to move upward along the isolation mechanism. The movable rod and the sliding rod move to the right, and the movable frame separates from the isolation mechanism, thereby enabling the isolation mechanism to drive the ring main unit to perform circuit breaking.

[0034] Optionally, the connector includes an electric push rod fixed to the cabinet and a limiting block fixed to the electric push rod. Each of the three heat dissipation pipes is fixedly connected to a control switch. All three control switches are electrically connected to the electric push rod. A limiting hole is opened on the inner side of the limiting block. The sliding rod and the movable rod are slidably connected to the limiting hole. The hinge of the sliding rod and the movable rod is located in the middle of the limiting hole. The three control switches respectively movably engage with the three adjustment plates.

[0035] By adopting the above technical solution, the connector can automatically cut off the power when the temperature inside the cabinet reaches its limit. When the temperature inside the cabinet is too high, the temperature of the isolating knife group, vacuum circuit breaker and permanent magnet mechanism will rise. The lifting component will drive the three adjusting plates to move upward to their limit positions and contact the three control switches respectively, indicating that the temperature inside the cabinet has reached its limit and is prone to failure. The three control switches will drive the electric push rod, which can drive the limit block to move to the right. This can move the hinge of the sliding rod and the movable rod out of the limit block. The elastic force of the telescopic spring can drive the movable frame to move upward along the isolation mechanism, which can then drive the movable rod to swing at an angle, so that the movable frame is separated from the isolation mechanism, and the ring main unit can be alarmed and disconnected.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. Wind power is generated by the synchronous drive, and this wind is blown into the cabinet through connecting pipes and three heat dissipation pipes. The three heat dissipation pipes first direct the wind power onto the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism, respectively, to dissipate heat from these components. Simultaneously, after passing through these components, the wind circulates within the cabinet, further dissipating heat from other components to ensure effective heat dissipation within the ring main unit. The lifting mechanism allows for the detection of heat from the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism. The heat generated by the permanent magnet mechanism can be controlled by adjusting the airflow of the three heat pipes. The higher the heat generated by the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism, the higher the airflow of the heat pipes. This enhances the heat dissipation effect of the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism, preventing them from being damaged due to high-temperature aging. Conversely, when the heat generated by the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism is low, the airflow of the heat pipes is low. This prevents the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism from overheating, which could cause mechanical jamming and poor contact, thus ensuring the performance of the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism.

[0038] 2. The drive unit can detect the ambient temperature and the external temperature of the cabinet. When the ambient temperature is high, the airflow generated by the synchronization unit can be used to cool down the airflow. When the ambient temperature is low, the airflow generated by the synchronization unit can be kept at a normal temperature, saving power. Therefore, in high-temperature weather, the heat dissipation efficiency of the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism inside the ring main unit can be further enhanced, preventing the external temperature of the ring main unit from affecting the heat dissipation effect of the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism inside the ring main unit, and further ensuring the heat dissipation efficiency inside the ring main unit. When the humidity inside the cabinet is high, the drying component can dry the airflow generated by the synchronization unit, allowing the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism inside the ring main unit to be dried while dissipating heat, preventing the isolating knife group, vacuum circuit breaker, and permanent magnet mechanism from being affected by moisture, and enhancing the heat dissipation effect inside the ring main unit. When the inside of the cabinet is relatively dry, the drying component does not need to be driven, saving the use of desiccant.

[0039] 3. By arranging the cable compartment and control room of the cabinet in a left-right configuration, space is freed up in terms of height, minimizing obstruction of pedestrian and vehicle side views due to cabinet height, ensuring vehicle safety. Furthermore, the complete separation of high and low voltage enhances operator safety. In the event of a spark fault in the cable compartment, the fault can be prevented from rapidly spreading to the control room, giving staff time to respond and reducing the risk of overall damage to the ring main unit. When the energy storage voltage of the permanent magnet alarm mechanism exceeds the rated value, it can trigger an alarm on the ring main unit, alerting staff to conduct inspections and preventing accidents caused by the ring main unit. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0041] Figure 2 Cross-sectional view of the cabinet connection structure in this embodiment;

[0042] Figure 3 External view of the heat sink connection structure in the embodiments of this application;

[0043] Figure 4 Cross-sectional view of the heat sink connection structure in the embodiment of this application;

[0044] Figure 5 Examples of this application Figure 3 Enlarged view of point A in the middle.

[0045] Reference numerals in the attached diagram: 1. Cabinet; 2. Permanent magnet mechanism; 3. Vacuum circuit breaker; 4. Isolating knife assembly; 5. Terminal assembly; 6. Isolation mechanism; 7. Auxiliary mechanism; 8. Movable handle; 9. Connecting frame; 10. Telescopic spring; 11. Movable frame; 12. Threaded rod; 13. Support frame; 14. Sliding rod; 15. Movable rod; 16. Motor; 17. Rotating shaft; 18. Second bevel gear; 19. First bevel gear; 20. Fan blade; 21. Heat sink; 22. 23. Fixed cover; 24. Refrigerator; 25. Cooling pipe; 26. Grid pipe; 27. Desiccant box; 28. Sealing cover; 29. ​​Intelligent push rod; 30. Heating block; 31. Drive block; 32. Connecting block; 33. Battery; 34. Photovoltaic panel; 35. Connecting pipe; 36. Heat dissipation pipe; 37. Fixed block; 38. Adjusting block; 39. Connecting rod; 40. Adjusting plate; 41. Control switch; 42. Electric push rod; 43. Limit block; 44. Humidity sensor. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0047] This application discloses a rear-outgoing ring main unit for smart grid power distribution, referring to... Figure 1 and Figure 2 The system includes a cabinet 1, a terminal block 5, an isolating blade assembly 4, a vacuum circuit breaker 3, a permanent magnet mechanism 2, an isolation mechanism 6, and an auxiliary mechanism 7, all mounted on the cabinet 1. An alarm mechanism is also included to drive the isolation mechanism 6 to trigger an alarm. The cabinet 1 is equipped with a heat dissipation mechanism for synchronously cooling the isolating blade assembly 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2. The heat dissipation mechanism includes a heat dissipation box 21 fixed inside the cabinet 1, a connecting pipe 34 connected to the heat dissipation box 21, three heat dissipation pipes 35 connected to the connecting pipe 34, a blowing assembly for blowing air into the three heat dissipation pipes 35, and airflow components for adjusting the airflow into each of the three heat dissipation pipes 35. The system includes a temperature control component for regulating the airflow temperature and a drying component for drying the airflow; the blowing component includes multiple fan blades 20 rotatably disposed within the heat dissipation box 21 and a synchronizing component for synchronously driving the multiple fan blades 20 to rotate; the airflow component includes adjusting plates 39 movably disposed on three heat dissipation pipes 35 and a lifting component for lifting the adjusting plates 39; the temperature control component includes a grid pipe 25 fixed within the heat dissipation box 21, a cooler 23 for cooling the liquid within the grid pipe 25, a driving component for timed driving of the cooler 23, and a heat dissipation component for heat dissipation of the cooler 23.

[0048] The synchronizing components include multiple first bevel gears 19, multiple second bevel gears 18, and a rotating shaft 17 rotatably disposed within the heat dissipation box 21, as well as a motor 16 fixed to the cabinet 1. Multiple fan blades 20 are coaxially fixed with the multiple first bevel gears 19, the multiple first bevel gears 19 mesh with the multiple second bevel gears 18, the multiple second bevel gears 18 are all fixedly connected to the rotating shaft 17, the rotating shaft 17 is fixedly connected to the output shaft of the motor 16, and the multiple fan blades 20 are all located above the mesh tube 25.

[0049] The lifting component includes fixing blocks 36 fixed to three heat dissipation pipes 35, adjusting blocks 37 fixed within the fixing blocks 36, and connecting rods 38 fixed to the adjusting blocks 37. The three connecting rods 38 are fixedly connected to three adjusting plates 39. An air passage gap is provided between the adjusting plates 39 and the heat dissipation pipes 35. Each of the three heat dissipation pipes 35 has a groove, and the three adjusting plates 39 are slidably connected to the three grooves. The three heat dissipation pipes 35 are located on the isolating knife group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2, respectively. The three fixing blocks 36 are connected to the isolating knife group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2, respectively. Each of the three heat dissipation pipes 35 has a sliding hole with a diameter equal to that of the connecting rod 38, and the three connecting rods 38 are slidably connected to the three sliding holes. The lifting mechanism is activated by the three heat dissipation pipes 35. The varying heights of the heat pipes arranged within cabinet 1 prevent heat buildup and allow for rapid airflow to all areas of cabinet 1. This maximizes the use of space within cabinet 1, avoids interference between the three heat pipes 35, and accelerates the heat dissipation of components such as the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2. Since hot air rises, the top temperature is often higher than the bottom. Heat pipes 35 at different heights can dissipate heat from different areas, achieving a more uniform heat dissipation effect. Even if the temperature varies at different heights within cabinet 1, the three heat pipes 35 can achieve different heat dissipation effects by adjusting the temperature via the regulating block 37. This allows the three heat pipes 35 to dissipate heat from the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 with optimal airflow.

[0050] The driving components include a photovoltaic panel 33 and a battery 32 mounted on the cabinet 1, a cooling pipe 24 fixed on the cooler 23, a heating block 29 fixed on the cabinet 1, a driving block 30 fixed on the heating block 29, a connecting block 31 fixed on the driving block 30, an inductive switch mounted on the battery 32, and a cooling pipe 24 fixed on the cooler 23. The photovoltaic panel 33 and the cooler 23 are electrically connected to the battery 32. The cooler 23 is fixedly connected to the cabinet 1. The cooling pipe 24 is located inside the mesh pipe 25. A control valve is installed on the mesh pipe 25. By adjusting the control valve, the liquid in the mesh pipe 25 can be drained and replaced. The left side of the mesh pipe 25 is connected to the cabinet 1. A fixing hole with the same diameter as the connecting block 31 is opened on the heating block 29. The connecting block 31 is slidably connected to the fixing hole. The battery 32 is located below the photovoltaic panel 33. The connecting block 31 is movably attached to the inductive switch. The inductive switch is a telescopic switch.

[0051] The drying assembly includes a desiccant box 26 fixed inside the heat dissipation box 21, a sealing cover 27 slidably disposed on the desiccant box 26, and a smart push rod 28 fixed on the sealing cover 27. The smart push rod 28 is fixedly connected to the heat dissipation box 21. The sealing cover 27 has equidistantly arranged air vents, and the desiccant box 26 has equidistantly arranged connection holes. The multiple air vents are movably fitted with the multiple connection holes respectively. A humidity sensor 43 is installed inside the cabinet 1. The humidity sensor 43 is electrically connected to the smart push rod 28. A connecting plate is provided on the desiccant box 26, and an mounting plate is provided on the heat dissipation box 21. When it is necessary to add desiccant to the desiccant box 26, the mounting plate and the connecting plate can be removed, and desiccant can be added to the desiccant box 26. The desiccant box 26 is located below the mesh tube 25.

[0052] The heat dissipation component includes a fixed cover 22 fixed to the heat dissipation box 21. Among the multiple fan blades 20, the leftmost fan blade 20 is the heat dissipation blade. The cooler 23 and the heat dissipation blade are both located inside the fixed cover 22. The outlet of the fixed cover 22 is located outside the cabinet 1. The cabinet 1 is provided with an air inlet and a ventilation outlet. Both the air inlet and the ventilation outlet are provided with rain guards to minimize the entry of rainwater and particles into the cabinet 1, while ensuring the ventilation and heat dissipation effect inside the cabinet 1.

[0053] The cabinet 1 is equipped with a cable compartment and an operating compartment. The isolating knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 are all located in the operating compartment. The connection end of the terminal group 5 and the isolating knife group 4 is located in the operating compartment. The terminal end of the terminal group 5 is located in the cable compartment. A waterproof plate is installed on the operating compartment to prevent rainwater from entering the operating compartment.

[0054] The alarm mechanism includes a connecting frame 9 slidably mounted on the auxiliary mechanism 7, a movable frame 11 slidably mounted on the isolation mechanism 6, a movable component for raising and lowering the connecting frame 9, a translation component for raising and lowering the movable frame 11, and a connecting component.

[0055] The movable component includes a movable handle 8 rotatably mounted on the auxiliary mechanism 7, and both the isolation mechanism 6 and the movable handle 8 are movably fitted with the connecting frame 9.

[0056] The translation component includes a support frame 13 and a sliding rod 14 slidably mounted on the cabinet 1, a telescopic spring 10 fixed on the movable frame 11, and a movable rod 15 hinged to the sliding rod 14. A threaded rod 12 is threadedly connected to the cabinet 1, and the threaded rod 12 is movably fitted with the support frame 13. Both the support frame 13 and the movable frame 11 are provided with arc surfaces. The sliding rod 14 is movably fitted with the arc surface of the support frame 13, and the movable rod 15 is movably fitted with the arc surface of the movable frame 11. The telescopic spring 10 is fixedly connected to the isolation mechanism 6.

[0057] The connectors include an electric push rod 41 fixed to the cabinet 1, a limiting block 42 fixed to the electric push rod 41, and control switches 40 fixedly connected to each of the three heat dissipation pipes 35. The three control switches 40 are electrically connected to the electric push rod 41. A limiting hole is opened on the inner side of the limiting block 42. The sliding rod 14 and the movable rod 15 are slidably connected to the limiting hole. The hinge of the sliding rod 14 and the movable rod 15 is located in the middle of the limiting hole. The three control switches 40 are respectively in contact with the three adjusting plates 39. The three control switches 40 are respectively located in the grooves of the three heat dissipation pipes 35.

[0058] Cabinet 1 is equipped with a video sensor, a moisture sensor, an intelligent controller, and an alarm. The video sensor can monitor the operation of the power lines inside cabinet 1 in real time, automatically judge, and take protective actions for the lines and equipment. The moisture sensor detects whether liquid has seeped into cabinet 1. The video sensor, moisture sensor, alarm, and electric push rod 41 are all electrically connected to the intelligent controller. When the video sensor detects a fault inside cabinet 1, or the moisture sensor detects liquid seepage inside cabinet 1, it will transmit a signal to the intelligent controller to inform the staff of the fault inside cabinet 1. At the same time, it will trigger the alarm to alert passers-by to pay attention to safety. It can also activate the connector to disconnect the power to the isolation mechanism 6, thereby disconnecting the power to the ring main unit and ensuring the safety of the ring main unit.

[0059] The ring main unit is used on the street. During operation, the internal temperature of the ring main unit can reach up to 120°C, while the external temperature can reach up to 100°C due to weather conditions. Therefore, the material of the regulating block 37 is preferably high-temperature plastic. For other operating conditions, epoxy resin, composite materials, and natural rubber can also be used, as long as the material can expand and contract within 120°C. Similarly, the material of the drive block 30 is preferably high-molecular plastic. For other operating conditions, styrene-butadiene rubber, nitrile rubber, and ethylene propylene rubber can also be used, as long as the material can withstand expansion and contraction within 100°C. The selected materials possess excellent high-temperature performance, mechanical strength, fatigue resistance, and corrosion resistance, ensuring the long-term use of the regulating block 37 and drive block 30. The lifespan ensures the effectiveness of temperature detection by the regulating block 37 and the drive block 30. In the existing technology, the method of controlling the air output of the pipeline based on temperature is usually achieved by using a temperature sensor to control a solenoid valve. However, the temperature sensor is subject to electromagnetic interference in high-temperature environments and when placed near the permanent magnet mechanism 2, vacuum circuit breaker 3, and isolating knife group 4. Consequently, the accuracy of the air output of the electrically controlled pipeline is affected, and the effect of wind power control cannot be guaranteed. Moreover, if the temperature sensor is placed on the cabinet 1 to detect the weather, it will be frequently exposed to sunlight and rain, which will affect its lifespan. Compared with the method of controlling the wind power using a mechanical linkage structure, the method of controlling the wind power using a temperature sensor and a solenoid valve has the advantages of high reliability, fast response speed, no need for external energy, low cost, and good environmental adaptability.

[0060] The isolation mechanism 6 is equipped with a trigger. The isolation knife group 4 and the vacuum circuit breaker 3 can be configured together. When the vacuum circuit breaker 3 and the isolation knife group 4 are closed, the normal operation of the ring main unit can be ensured. When the isolation knife group 4 and the vacuum circuit breaker 3 are not closed, the ring main unit can be kept in an un-energized state to ensure that personnel can operate without electric shock. The vacuum circuit breaker 3 has the characteristics of rapid power-off and not easily damaged. It can cut off or connect the circuit under high voltage, playing a role in protecting equipment and preventing accidents. The isolation knife group 4 is mainly used to isolate the power supply, ensuring that personnel can operate safely during equipment maintenance or fault handling. The permanent magnet mechanism 2 can realize the rapid opening and closing operation of the isolation knife group 4 and cut off the fault current. When used in conjunction with the isolation knife group 4, the permanent magnet mechanism 2 can ensure that the ring main unit can quickly cut off or connect the circuit when needed, thereby protecting the safe operation of the power grid. In the ring main unit, auxiliary mechanism 7 supports and assists the operation of permanent magnet mechanism 2 and isolating knife group 4. When vacuum circuit breaker 3, isolating knife group 4, permanent magnet mechanism 2, auxiliary mechanism 7 and isolating mechanism 6 are driven together, they work together to ensure the efficient and stable operation of the ring main unit, and can achieve precise control and protection of the circuit. When the ring main unit is in the power grid fault, these mechanisms can respond quickly, cut off the faulty circuit, prevent the accident from escalating, and thus protect the safe operation of the power grid. When the energy storage voltage of permanent magnet mechanism 2 exceeds the rated value, it will drive the movable handle 8 to rotate, which will make the connecting frame 9 contact the trigger on the isolating mechanism 6, triggering the alarm to remind the staff to perform inspection to prevent the ring main unit from causing an accident. At the same time, it can perform interlocking operation and drive vacuum circuit breaker 3 to open, avoiding chain damage and catastrophic accidents.

[0061] The implementation principle of a rear-outgoing ring main unit for smart grid power distribution in this application embodiment is as follows:

[0062] (1) When the ring main unit is driven, the motor 16 can sequentially drive the rotating shaft 17, multiple second bevel gears 18, multiple first bevel gears 19 and multiple fan blades 20 to rotate and generate strong wind. The wind can then be blown into the cabinet 1 through the heat dissipation box 21, the connecting pipe 34 and the three heat dissipation pipes 35. The three heat dissipation pipes 35 will first blow the wind onto the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 respectively, which can first blow the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 for heat dissipation. At the same time, after passing through the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2, the wind will circulate in the cabinet 1, which can also dissipate heat for other components in the cabinet 1, so as to ensure the heat dissipation effect inside the ring main unit.

[0063] (2) When the isolating knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 are driven, the heat from the isolating knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 will be conducted to the three fixed blocks 36 for heating. When the three fixed blocks 36 are heated, the heat will be conducted to the three adjusting blocks 37 respectively, and the three adjusting blocks 37 can be used to transfer heat to the three adjusting blocks 37 respectively. The three adjusting blocks 37 can detect the heat of the isolating knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 respectively. When the temperature detected by the adjusting block 37 is high, the adjusting block 37 will expand due to the high temperature. Through the expansion and contraction of the adjusting block 37, the three adjusting blocks 37 can be changed according to the temperature changes of the isolating knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 respectively. The expansion and contraction of the adjusting block 37 will drive the connecting rod 38 and the adjusting plate 39 to move in sequence, and the size of the air gap between the heat sink 35 and the adjusting plate 39 can be adjusted. The higher the temperature of the adjusting block 37, the greater the expansion. The more the adjusting plate 39 moves into the groove, the larger the air gap becomes, and the more airflow comes out of the heat dissipation pipe 35. Therefore, the heat generated by the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 can control the airflow of the heat dissipation pipe 35. The higher the heat generated by the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2, the higher the airflow of the heat dissipation pipe 35, which can enhance the heat dissipation effect of the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 and prevent them from aging and being damaged due to high temperature. Conversely, when the heat generated by the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 is low, the airflow of the heat dissipation pipe 35 is low, which can prevent the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 from overheating, causing mechanical jamming and poor contact of the contacts, and ensuring the performance of the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2.

[0064] (3) When the ring main unit is installed on the street, the ambient temperature will affect the driving of the isolating knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 inside the ring main unit. When the weather temperature is high, the heat from the light and the outside of the cabinet 1 will be conducted to the heating block 29 for heating. At the same time, when the temperature inside the ring main unit is too high, it will also be conducted to the outside of the ring main unit. When the heating block 29 is heated, it will conduct heat to the driving block 30, which can transfer heat to the driving block 30. The driving block 30 can detect the temperature outside the cabinet 1. When the driving block 30 detects the temperature outside the cabinet 1, the driving block 30 will be heated by the temperature. The expansion and contraction of the drive block 30, caused by temperature changes, allows it to adjust to variations in external weather and the external temperature of the cabinet 1. This expansion and contraction of the drive block 30 moves the connecting block 31. When the connecting block 31 moves, it contacts and presses against the inductive switch on the battery 32, driving the battery 32. This, in turn, drives the cooler 23 to cool the cooling pipe 24. The cooling pipe 24 cools the liquid inside the mesh pipe 25, generating cool air on the outside of the mesh pipe 25. Therefore, when the multiple fan blades 20 rotate to generate wind, they disperse the cool air outside the mesh pipe 25, creating cool airflow and thus cooling the airflow. In warmer weather, the cooling efficiency of the isolating switch group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 inside the ring main unit can be further enhanced, preventing the external temperature of the ring main unit from being too high and affecting the cooling effect of the isolating switch group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 inside the ring main unit. This further ensures the cooling efficiency inside the ring main unit. The photovoltaic panel 33 can absorb light and convert it into electrical energy to power the battery 32, allowing the cooler 23 to work continuously in warm weather to ensure the effect of wind cooling. At the same time, in cold weather and when the external heat of the cabinet 1 is low, the heating block 29 will not be heated to drive the connecting block 3. When the device moves, the cooler 23 will not be driven, and the temperature inside the mesh tube 25 will remain at room temperature. The cooler 23 can be controlled according to the weather temperature, which can save energy resources. The cooler 23 does not need to be continuously driven, which enhances the heat dissipation effect inside the ring main unit and avoids excessive local temperature rise inside the ring main unit. The heat dissipation level of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 can be controlled according to the different driving temperatures of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 and the weather temperature outside the ring main unit, so as to avoid insufficient heat dissipation or excessive heat dissipation of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2.

[0065] (4) The humidity inside the cabinet 1 can be detected by the humidity sensor 43. When the humidity inside the cabinet 1 is too high, the intelligent push rod 28 can drive the sealing cover 27 to move, so that the multiple air outlets on the sealing cover 27 correspond to the multiple connection holes on the desiccant box 26, so that the desiccant box 26 can be in the open state. Then, when the multiple fan blades 20 rotate to generate wind, the desiccant in the desiccant box 26 can be quickly dispersed, and the wind can be dried. Therefore, when the humidity inside the cabinet 1 is high, the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 inside the ring network cabinet can be dried at the same time to prevent the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 from being affected by moisture. At the same time, when the inside of the cabinet 1 is relatively dry, the intelligent push rod 28 can drive the sealing cover 27 to move, so that the multiple air outlets on the sealing cover 27 and the multiple connection holes on the desiccant box 26 are misaligned, so that the desiccant box 26 can be completely closed, so that the desiccant in the desiccant box 26 is not used when the inside of the cabinet 1 is relatively dry, thus saving the use of desiccant.

[0066] (5) The wind generated when the heat dissipation blades rotate will flow in the fixed cover 22, and the flow of wind can dissipate heat from the cooler 23 to ensure the driving effect of the cooler 23 and prevent the cooler 23 from being damaged due to continuous operation.

[0067] (6) When the voltage of the permanent magnet mechanism 2 exceeds the limit, the permanent magnet mechanism 2 can drive the movable handle 8 to move the connecting frame 9 along the auxiliary mechanism 7, so that the connecting frame 9 can contact the trigger on the isolation mechanism 6, and then the ring main unit can be alarmed, which can remind the staff to perform the test to prevent the ring main unit from causing an accident.

[0068] (7) When the operator needs to operate the terminal block 5, the threaded rod 12 will be rotated to move downwards, which will cause the support frame 13 to move downwards along the cabinet 1, causing the support frame 13 to lose its clamping force on the sliding rod 14. Then, through the elastic force of the telescopic spring 10, the movable frame 11 can be driven to move upwards along the isolation mechanism 6, which will in turn drive the movable rod 15 and the sliding rod 14 to move to the right. The movable frame 11 will separate from the isolation mechanism 6, which can disconnect the ring main unit and prevent the operator from being electrocuted when operating the terminal block 5, thus ensuring the safety of the operator. When the operator needs to operate the electronic components inside the ring main unit... When the components are in use, the isolation mechanism 6 can be directly operated to de-energize the ring main unit. When the movable rod 15 moves, the hinge of the movable rod 15 and the sliding rod 14 can always slide within the limit block 42. This is because the range of movement of the movable rod 15 driven by the sliding rod 14 and the movable frame 11 is not large. The limit hole in the limit block 42 can limit the hinge of the sliding rod 14 and the movable rod 15, preventing the movable rod 15 from swinging when it moves with the sliding rod 14 and the movable frame 11, and preventing accidents when the terminal block 5 de-energizes the isolation mechanism 6.

[0069] (8) When the cooler 23 malfunctions and fails to cool the liquid to produce cold air, or when a fire occurs inside the cabinet 1, the temperature of the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 becomes difficult to decrease. At this time, the overall temperature of the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 inside the cabinet 1 will rise. Consequently, when the three adjusting blocks 37 detect the temperature of the isolating knife group 4, vacuum circuit breaker 3, and permanent magnet mechanism 2 respectively, they will drive the three adjusting plates 39 to move upward to their limit positions. The three adjusting plates 39 will then contact the three control switches 40 respectively. When the three control switches 40 are activated simultaneously, it indicates that the temperature of the cabinet 1 is rising. When the internal temperature reaches its limit and a malfunction occurs, the three control switches 40 will drive the electric push rod 41. The electric push rod 41 can drive the limit block 42 to move to the right, so that the limit block 42 moves on the sliding rod 14. This can move the hinge between the sliding rod 14 and the movable rod 15 out of the limit block 42, thereby causing the movable rod 15 to lose its limit. Through the elastic force of the telescopic spring 10, the movable frame 11 can be driven to move upward along the isolation mechanism 6, thereby causing the movable rod 15 to swing at an angle, so that the movable frame 11 is separated from the isolation mechanism 6. This can perform alarm and circuit breaking on the ring main unit, thereby ensuring the safety of use inside the cabinet 1.

[0070] (9) Setting the cable compartment and operating room of cabinet 1 to be arranged on the left and right can free up space in height, and avoid cabinet 1 from blocking the side view of pedestrians and vehicles due to its height, thus ensuring the safety of vehicle driving. It can also completely separate high voltage and low voltage, which can improve the safety performance of operators. When a spark fault occurs in the cable compartment, it can prevent the spark fault in the cable compartment from spreading to the operating room as quickly as possible, giving the staff time to deal with it and reducing the risk of damage to the entire ring network cabinet.

[0071] The above are all 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. A rear outlet ring main unit for smart grid power distribution, characterized in that: The utility model relates to a kind of vacuum circuit breaker, including cabinet (1), setting on the terminal group (5) of wiring of cabinet (1), isolation knife group (4), vacuum circuit breaker (3), permanent magnet mechanism (2), isolation mechanism (6) and auxiliary mechanism (7) and for driving isolation mechanism (6) alarm alarm mechanism, the cabinet (1) is provided with for the synchronous heat dissipation of isolation knife group (4), vacuum circuit breaker (3) and permanent magnet mechanism (2) heat dissipation mechanism; The heat dissipation mechanism includes a heat dissipation box (21) fixed in the cabinet (1), a connecting pipe (34) communicated with the heat dissipation box (21), and three heat dissipation pipes (35) communicated with the connecting pipe (34), a blowing assembly for blowing in the three heat dissipation pipes (35), a wind volume assembly for adjusting the wind volume in the three heat dissipation pipes (35) respectively, a temperature control assembly for adjusting the wind temperature, and a drying assembly for drying the wind. The blowing assembly includes a plurality of fan blades (20) rotatably arranged in the heat dissipation box (21), and a synchronizing member for synchronously driving the plurality of fan blades (20). The wind volume assembly includes adjusting plates (39) movably arranged on the three heat dissipation pipes (35) respectively, and a lifting member for lifting driving the adjusting plates (39). The temperature control assembly includes a mesh pipe (25) fixed in the heat dissipation box (21), a refrigerator (23) for cooling the liquid in the mesh pipe (25), a driving member for timing driving the refrigerator (23), and a heat dissipation member for heat dissipation of the refrigerator (23). The lifting member includes fixed blocks (36) fixed on the three heat dissipation pipes (35) respectively, adjusting blocks (37) fixed in the fixed blocks (36), and connecting rods (38) fixed on the adjusting blocks (37). The three connecting rods (38) are fixedly connected with the three adjusting plates (39) respectively. The adjusting plates (39) are provided with wind passing gaps between the heat dissipation pipes (35). The three fixed blocks (36) are connected with the isolation knife group (4), the vacuum circuit breaker (3), and the permanent magnet mechanism (2) respectively. The three heat dissipation pipes (35) are located on the isolation knife group (4), the vacuum circuit breaker (3), and the permanent magnet mechanism (2) respectively. The three heat dissipation pipes (35) blow wind on the isolation knife group (4), the vacuum circuit breaker (3), and the permanent magnet mechanism (2) respectively. The cabinet (1) is provided with a cable chamber and an operating chamber. The isolation knife group (4), the vacuum circuit breaker (3), and the permanent magnet mechanism (2) are located in the operating chamber. The connecting end of the terminal group (5) and the isolation knife group (4) is located in the operating chamber. The wiring end of the terminal group (5) is located in the cable chamber. The cable chamber and the operating chamber of the cabinet (1) are arranged in a left-right manner.

2. The rear outlet ring main unit for power distribution of smart grid according to claim 1, characterized in that: The synchronizer comprises a plurality of first bevel gears (19), a plurality of second bevel gears (18) and a rotating shaft (17) arranged in the heat dissipation box (21) and a motor (16) fixed on the cabinet (1), a plurality of the fan blades (20) are coaxially fixed with the plurality of first bevel gears (19), the plurality of first bevel gears (19) are engaged with the plurality of second bevel gears (18), the plurality of second bevel gears (18) are fixedly connected with the rotating shaft (17), and the rotating shaft (17) is fixedly connected with the output shaft of the motor (16).

3. The rear outlet ring main unit for power distribution of smart grid according to claim 1, characterized in that: The driving member comprises a photovoltaic panel (33) and a storage battery (32) arranged on the cabinet (1), a cooling pipe (24) fixed on the refrigerator (23), a heated block (29) fixed on the cabinet (1), a driving block (30) fixed on the heated block (29), a connecting block (31) fixed on the driving block (30), an inductive switch arranged on the storage battery (32) and the cooling pipe (24) fixed on the refrigerator (23), the photovoltaic panel (33) and the refrigerator (23) are electrically connected with the storage battery (32), the refrigerator (23) is fixedly connected with the cabinet (1), the cooling pipe (24) is located on the inner side of the grid pipe (25), and the connecting block (31) is movably attached to the inductive switch.

4. The rear outlet ring main unit for power distribution of smart grid according to claim 3, characterized in that: The drying assembly comprises a drying agent box (26) fixed in the heat dissipation box (21), a sealing cover (27) slidingly arranged on the drying agent box (26) and an intelligent push rod (28) fixed on the sealing cover (27), the intelligent push rod (28) is fixedly connected with the heat dissipation box (21), a plurality of air outlet holes are arranged at equal distances on the sealing cover (27), a plurality of connecting holes are arranged at equal distances on the drying agent box (26), a plurality of the air outlet holes are movably attached to the connecting holes, a humidity sensor (43) is installed in the cabinet (1), and the humidity sensor (43) is electrically connected with the intelligent push rod (28).

5. The rear outlet ring main unit for power distribution of smart grid according to claim 1, characterized in that: The heat dissipation member comprises a fixing cover (22) fixed on the heat dissipation box (21), and the fan blade (20) located at the leftmost side of the plurality of fan blades (20) is a heat dissipation blade, and the refrigerator (23) and the heat dissipation blade are located on the inner side of the fixing cover (22).

6. The rear outlet ring main unit for power distribution of smart grid according to claim 1, characterized in that: The alarm mechanism comprises a connecting frame (9) slidingly arranged on the auxiliary mechanism (7), a movable frame (11) slidingly arranged on the isolation mechanism (6), a moving member for lifting the connecting frame (9), a translating member for lifting the movable frame (11) and a connecting member; The moving member comprises a movable handle (8) rotatably arranged on the auxiliary mechanism (7), and the isolation mechanism (6) and the movable handle (8) are movably attached to the connecting frame (9).

7. The rear outlet ring main unit for power distribution of smart grid according to claim 6, characterized in that: The translation member comprises a support frame (13) and a sliding rod (14) slidingly arranged on the cabinet body (1), an extension spring (10) fixed to the movable frame (11), and a movable rod (15) hingedly connected to the sliding rod (14), the cabinet body (1) is threadedly connected with a threaded rod (12), the threaded rod (12) is movably attached to the support frame (13), the support frame (13) and the movable frame (11) are both provided with arc surfaces, the sliding rod (14) is movably attached to the arc surface of the support frame (13), the movable rod (15) is movably attached to the arc surface of the movable frame (11), and the extension spring (10) is fixedly connected with the isolation mechanism (6).

8. The rear outlet ring main unit for power distribution of smart grid according to claim 7, characterized in that: The connecting member comprises an electric push rod (41) fixed to the cabinet body (1) and a limiting block (42) fixed to the electric push rod (41), the three heat dissipation pipes (35) are all fixedly connected with control switches (40), the three control switches (40) are all electrically connected with the electric push rod (41), the inner side of the limiting block (42) is provided with a limiting hole, the sliding rod (14) and the movable rod (15) are both slidingly connected with the limiting hole, the hinged portion of the sliding rod (14) and the movable rod (15) is located in the middle of the limiting hole, and the three control switches (40) are movably attached to the three adjusting plates (39) respectively.

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