Rear outgoing line type ring main unit for power distribution of intelligent power grid

Abstract

The invention relates to a rear outgoing line type ring main unit for power distribution of an intelligent power grid, which relates to the technical field of ring main units and comprises a cabinet body, a wiring terminal group, an isolation knife group, a vacuum circuit breaker, a permanent magnetic mechanism, an isolation mechanism, an auxiliary mechanism and an alarm mechanism for driving the isolation mechanism to give an alarm, and the wiring terminal group, the isolation knife group, the vacuum circuit breaker, the permanent magnetic mechanism, the isolation mechanism and the auxiliary mechanism are arranged on the cabinet body. The cabinet body is provided with a heat dissipation mechanism used for carrying out synchronous heat dissipation on the isolation knife group, the vacuum circuit breaker and the permanent magnetic mechanism. The heat dissipation mechanism comprises a heat dissipation box fixed in the cabinet body, a connecting pipe communicating with the heat dissipation box, three heat dissipation pipes communicating with the connecting pipe, an air blowing assembly used for blowing air into the three heat dissipation pipes, an air volume assembly used for adjusting the air volume in the three heat dissipation pipes, and a temperature control assembly used for adjusting the wind power temperature. According to different driving temperatures of the isolation knife group, the vacuum circuit breaker and the permanent magnetic mechanism and the weather temperature outside the ring main unit, the heat dissipation levels of the isolation knife group, the vacuum circuit breaker and the permanent magnetic mechanism can be controlled.

Description

Technical Field

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

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

[0003] The ring main unit is divided into a cable room and an operation room. In order to reduce the area occupied by the ground, the cable room of the traditional ring main unit is usually set on the bottom side of the ring main unit, and the operation room is located on the top side of the ring main unit. For example, the Chinese patent with publication number CN114362025A in the related technology proposes a ring main unit, which has a first function loop switch and a second function loop switch arranged along a first direction, and the bottom end of the first function loop switch and the side of the second function loop switch form a layout space, and the top end of the second function loop switch and the side of the first function loop switch form another layout space. Through these two layout spaces, the distance requirements between the relative ground and the relative phases when setting the first function loop switch and the second function loop switch can be met, thereby reducing the width of the ring main unit.

[0004] Regarding the above-mentioned related technologies, the inventor believes that there are the following defects: arranging the cable room and operation room of the ring network cabinet up and down will make the height space of the ring network cabinet higher. When installed on both sides of the street, it is easy to block the side vision of pedestrians and vehicles, so that pedestrians and vehicles need to pay special attention to oncoming pedestrians when passing through the ring network cabinet, causing inconvenience to pedestrians and vehicles. Moreover, setting the operation room above the cable room will cause the hot air in the cable room to rise naturally, thereby affecting the heat dissipation efficiency of the operation room. When sparks are generated in the cable room, they will quickly spread to the operation room, increasing the risk of overall damage to the ring network cabinet. Summary of the Invention

[0005] In order to solve the problem that the cable room and operation room of the existing ring network cabinet are arranged up and down, which makes the height space of the ring network cabinet higher and easily blocks the side view of pedestrians and vehicles when installed on both sides of the street, and at the same time, the heat dissipation requirements of various electrical components in the ring network cabinet are different, and the heat dissipation mechanism dissipates heat for all electrical components at the same level, which may lead to insufficient heat dissipation of some electrical components and excessive heat dissipation of some electrical components, the present application provides a rear-outlet ring network cabinet for smart grid power distribution.

[0006] The present application provides a rear-outlet ring main unit for smart grid power distribution that adopts the following technical solution: A rear-outlet ring main unit for smart grid power distribution, comprising a cabinet body, a terminal block, an isolating switch block, a vacuum circuit breaker, a permanent magnet mechanism, an isolating mechanism, an auxiliary mechanism, and an alarm mechanism for driving the isolating mechanism to generate an alarm. The cabinet body is provided with a heat dissipation mechanism for synchronously dissipating heat from the isolating switch block, the vacuum circuit breaker, and the permanent magnet mechanism. The heat dissipation mechanism includes a heat dissipation box fixed in the cabinet, a connecting pipe connected to the heat dissipation box and three heat dissipation pipes connected to the connecting pipe, a blowing 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; The blowing assembly includes a plurality of fan blades rotatably arranged in the heat dissipation box and a synchronizing member for driving the plurality of fan blades to rotate synchronously; The air volume assembly includes adjustment plates movably arranged on the three heat dissipation pipes and a lifting member for lifting and lowering the adjustment plates; The temperature control assembly includes a grid tube fixed in the heat dissipation box, a refrigerator for cooling the liquid in the grid tube, a driving member for timing driving the refrigerator, and a heat dissipation member for dissipating heat from the refrigerator.

[0007] By adopting the above technical solution, the optimal operating temperature range of the ring network cabinet is usually 10℃-35℃. Within this temperature range, the performance of components such as the isolation knife group, vacuum circuit breaker and permanent magnet mechanism in the ring network cabinet can be guaranteed to be stable, and the aging rate of the components is normal. If the temperature in the ring network cabinet is continuously maintained at 0℃-10℃, the grease on the components such as the isolation knife group, vacuum circuit breaker and permanent magnet mechanism will solidify, which will increase the mechanical operation resistance, cause mechanical jamming, and poor contact of contacts, affecting the performance of components such as the isolation knife group, vacuum circuit breaker and permanent magnet mechanism. If the temperature in the ring network cabinet is continuously maintained at above 35℃, the aging of components such as the isolation knife group, vacuum circuit breaker and permanent magnet mechanism will be accelerated, affecting the service life of components such as the isolation knife group, vacuum circuit breaker and permanent magnet mechanism. The heat dissipation requirements of the isolation switch group, vacuum circuit breaker, and permanent magnet mechanism in the ring main unit are different. If the heat dissipation mechanism dissipates heat for the isolation switch group, vacuum circuit breaker, and permanent magnet mechanism simultaneously, there is a risk of insufficient heat dissipation of the isolation switch group and excessive heat dissipation of the vacuum circuit breaker and permanent magnet mechanism, affecting the performance of the isolation switch group, vacuum circuit breaker, and permanent magnet mechanism. The main heat sources of the vacuum circuit breaker are the arc plus contact resistance, the main heat source of the isolation 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 isolation switch group, vacuum circuit breaker, and permanent magnet mechanism are driven, the vacuum circuit breaker generates the highest heat, followed by the isolation switch group, and the permanent magnet mechanism generates the lowest heat. Therefore, when the isolation switch group, vacuum circuit breaker, and permanent magnet mechanism dissipate heat simultaneously, the wind speed level needs to be adjusted according to the heat of each part of the isolation switch group, vacuum circuit breaker, and permanent magnet mechanism to avoid the risk of insufficient or excessive heat dissipation when the isolation switch group, vacuum circuit breaker, and permanent magnet mechanism dissipate heat simultaneously. At the same time, the ring main unit is installed on the street, and the temperature of the heat dissipation mechanism for the isolation 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 body is usually metal and sealed, the external temperature of the ring main unit will indirectly affect the internal temperature. Therefore, in high temperature weather, while the isolation knife group, vacuum circuit breaker and permanent magnet mechanism are dissipating heat simultaneously, the temperature of the heat dissipation gas needs to be lowered to avoid the temperature inside the cabinet from increasing and exceeding the tolerance limit of each component. In low temperature weather, the simultaneous heat dissipation of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism needs to be reduced. At the same time, the cabinet needs to be dried to avoid the normal operation of each component affected by moisture inside the cabinet. The alarm mechanism enables the staff to alarm or power off the ring network cabinet when operating the ring network cabinet, the voltage of the permanent magnet mechanism exceeds the limit, or the internal temperature of the ring network cabinet reaches the limit. The heat dissipation mechanism can dissipate heat for the main heating components in the ring network cabinet, namely the isolation knife group, vacuum circuit breaker and permanent magnet mechanism. At the same time, the wind force in the three heat dissipation pipes can be controlled respectively according to the heat of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism, and the temperature of the wind force can be controlled according to the external ambient temperature. When the weather temperature is high, the temperature of the wind force can be reduced. When the humidity of the cabinet is high, the wind force can be dried.

[0008] Optionally, the synchronizing parts include a plurality of first bevel gears, a plurality of second bevel gears and a rotating shaft rotatably arranged in the heat dissipation box, and a motor fixed on the cabinet body, the plurality of fan blades are 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.

[0009] By adopting the above technical solution, the synchronizer can blow air to dissipate heat for the isolation knife group, vacuum circuit breaker and permanent magnet mechanism. The motor can drive the rotating shaft, multiple second bevel gears, multiple first bevel gears and multiple fan blades to rotate in sequence to generate strong wind force. The wind force 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 wind force onto the isolation knife group, vacuum circuit breaker and permanent magnet mechanism respectively for blowing and dissipating heat. At the same time, the wind force circulates and floats in the cabinet, which can also dissipate heat for other components in the cabinet.

[0010] Optionally, the lifting member includes a fixed block fixed on the three heat pipes respectively, an adjusting block fixed in the fixed block and a connecting rod fixed on the adjusting block, the three connecting rods are fixedly connected to the three adjusting plates respectively, and an air gap is provided between the adjusting plate and the heat pipe, and the three fixed blocks are respectively connected to the isolating knife group, the vacuum circuit breaker and the permanent magnet mechanism.

[0011] By adopting the above technical solution, the lifting parts can detect the temperature of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism, and control the wind force on the isolation knife group, vacuum circuit breaker and permanent magnet mechanism according to the temperature. The heat of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism will be respectively transferred to the three fixed blocks for heating, and then the heat will be transferred to the three adjustment blocks respectively. The adjustment blocks will expand due to high temperature. Through the expansion and contraction of the adjustment blocks, the expansion and contraction of the adjustment blocks will drive the connecting rod and the adjustment plate to move in turn, and the size of the wind gap can be adjusted. The higher the temperature of the adjustment block, the greater the expansion, the larger the wind gap, and the more air volume the heat pipe outputs. The heat driven by the isolation knife group, vacuum circuit breaker and permanent magnet mechanism can control the size of the air output of the three heat pipes respectively.

[0012] Optionally, the driving component includes a photovoltaic panel and a battery arranged on the cabinet, a cooling pipe fixed on the refrigerator, a heat block fixed on the cabinet, a driving block fixed on the heat block, a connecting block fixed on the driving block, an induction switch arranged on the battery, and a cooling pipe fixed on the refrigerator, the photovoltaic panel and the refrigerator are electrically connected to the battery, the refrigerator is fixedly connected to the cabinet, the cooling pipe is located on the inner side of the grid pipe, and the connecting block is movably fitted with the induction switch.

[0013] By adopting the above technical solution, the driving component can detect the weather temperature and the temperature outside the cabinet, and can control the wind temperature on the isolation knife group, vacuum circuit breaker and permanent magnet mechanism according to the weather temperature. When the weather temperature is high, the heat outside the cabinet will be transferred to the heat receiving block for heating, and the heat will be transferred to the driving block. The driving block will expand due to the high temperature. Through the expansion and contraction of the driving block, it will drive the connecting block to move, and it will contact and squeeze the induction switch on the battery to drive the battery, and drive the refrigerator to cool the cooling pipe, cool the liquid in the grid pipe, and generate cold air on the outside of the grid pipe. Then the wind can blow away the cold air on the outside of the grid pipe to form cold wind, which can cool the wind. In high temperature weather, the heat dissipation efficiency of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism in the ring network cabinet can be further enhanced.

[0014] Optionally, the drying component includes a desiccant box fixed in the heat dissipation box, a sealing cover slidably set on the desiccant box, and an intelligent push rod fixed on the sealing cover, the intelligent push rod is fixedly connected to the heat dissipation box, the sealing cover is provided with air outlet holes arranged at equal distances, the desiccant box is provided with connecting holes arranged at equal distances, the multiple air outlet holes are movably fitted with the multiple connecting holes respectively, and a humidity sensor is installed in the cabinet, and the humidity sensor is electrically connected to the intelligent push rod.

[0015] By adopting the above technical solution, the drying component can perform drying 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 outlet holes on the sealing cover correspond to the multiple connection holes on the desiccant box. The desiccant box can be opened and the desiccant in the desiccant box can be quickly dissipated when the wind flows. The isolation knife group, vacuum circuit breaker and permanent magnet mechanism in the ring network cabinet can be cooled while drying. At the same time, when the cabinet is relatively dry, the desiccant box can be completely closed to save the use of desiccant. Optionally, the heat sink includes a fixed cover fixed on the heat dissipation box, the fan blade located on the leftmost side of the plurality of fan blades is a heat dissipation blade, and the refrigerator and the heat dissipation blade are both located on the inner side of the fixed cover.

[0016] By adopting the above technical solution, the heat sink can efficiently dissipate heat for the refrigerator. When the synchronizer drives the heat dissipation blades to rotate, the generated wind will flow in the fixed cover, thereby dissipating heat for the refrigerator to ensure the driving effect of the refrigerator and enable the refrigerator to continue working.

[0017] Optionally, a cable room and an operating room are provided on the cabinet, the isolating knife group, vacuum circuit breaker and permanent magnet mechanism are all located in the operating room, the connecting end of the terminal group and the isolating knife group is located in the operating room, and the terminal of the terminal group is located in the cable room.

[0018] By adopting the above technical solution, the cable room and the operation room of the cabinet are arranged on the left and right, which can free up the space at the height of the cabinet and avoid blocking the sight of vehicles and passers-by on the street due to the cabinet being too high. 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 operator.

[0019] Optionally, the alarm mechanism includes a connecting frame slidably arranged on the auxiliary mechanism, a movable frame slidably arranged on the isolation mechanism, a movable member for lifting the connecting frame, a translation member for lifting the movable frame, and a connecting member; The movable part includes a movable handle rotatably arranged on the auxiliary mechanism, and the isolation mechanism and the movable handle are both movably fitted with the connecting frame.

[0020] By adopting the above technical solution, the alarm mechanism can alarm when the voltage of the permanent magnet mechanism exceeds the limit. At the same time, it can alarm and power off the ring network cabinet when the staff is operating the ring network cabinet or the internal temperature of the ring network cabinet reaches a certain level. The movable part can make the permanent magnet mechanism alarm when the voltage 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 alarming the ring network cabinet.

[0021] Optionally, the translation member includes a support frame and a sliding rod slidingly arranged on the cabinet body, a telescopic spring fixed on the movable frame, and a movable rod hinged on the sliding rod. A threaded rod is threadedly connected to the cabinet body, 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, the movable rod is movably fitted with the arc surface of the movable frame, and the telescopic spring is fixedly connected to the isolation mechanism.

[0022] By adopting the above technical solution, the translation part can enable the staff to perform circuit breaking when operating the terminal group. By rotating the threaded rod to make it rotate downward, the support frame can be moved downward along the cabinet body, causing the support frame to lose its pressing force on the sliding rod. The elastic force of the telescopic spring can drive the movable frame to move upward along the isolation mechanism, and the movable rod and the sliding rod move to the right, and the movable frame is separated from the isolation mechanism, so that the isolation mechanism can drive the ring network cabinet to perform circuit breaking.

[0023] Optionally, the connecting part includes an electric push rod fixed on the cabinet body and a limit block fixed on the electric push rod. The three heat pipes are fixedly connected with a control switch, and the three control switches are electrically connected to the electric push rod. A limit hole is opened on the inner side of the limit block, and the sliding rod and the movable rod are both slidably connected to the limit hole. The hinge between the sliding rod and the movable rod is located in the middle of the limit hole, and the three control switches are respectively movably fitted to the three adjustment plates.

[0024] By adopting the above technical solution, the connecting parts can automatically cut off the power when the temperature inside the cabinet reaches the limit. When the temperature inside the cabinet is too high, the temperature of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism as a whole will increase, and the lifting parts will drive the three adjustment plates to move upward to the limit position and contact the three control switches respectively, indicating that the temperature inside the cabinet has reached the 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 through the electric push rod, and the hinge of the sliding rod and the movable rod can be moved out of the limit block. The elastic force of the telescopic spring can drive the movable frame to move upward along the isolation mechanism, and then drive the movable rod to swing at an angle, so that the movable frame is separated from the isolation mechanism, and the ring network cabinet can be alarmed and circuit-breakered.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Wind can be generated by the drive of the synchronous parts. The wind can be blown into the cabinet through the connecting pipe and three heat dissipation pipes. The three heat dissipation pipes will first blow the wind on the isolation knife group, vacuum circuit breaker and permanent magnet mechanism respectively. The isolation knife group, vacuum circuit breaker and permanent magnet mechanism can be blown and cooled first. At the same time, the wind will circulate and float in the cabinet after passing through the isolation knife group, vacuum circuit breaker and permanent magnet mechanism, and other components in the cabinet can also be cooled to ensure the heat dissipation effect inside the ring network cabinet. The heat of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism can be detected by the lifting parts respectively. The heat generated by the permanent magnet mechanism can control the air output of the three heat pipes respectively. The higher the heat generated by the isolation knife group, vacuum circuit breaker and permanent magnet mechanism, the higher the air output of the heat pipe, which can enhance the heat dissipation effect of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism and prevent the isolation knife group, vacuum circuit breaker and permanent magnet mechanism from being damaged due to high temperature aging. On the contrary, when the heat generated by the isolation knife group, vacuum circuit breaker and permanent magnet mechanism is low, the air output of the heat pipe is low, which can prevent the isolation knife group, vacuum circuit breaker and permanent magnet mechanism from excessive heat dissipation causing mechanical jamming and poor contact of contacts, thereby ensuring the performance of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism. 2. The driving component can detect the weather temperature and the temperature outside the cabinet. When the weather temperature is high, the wind force generated by the synchronous component can be cooled down. When the weather temperature is low, the wind force generated by the synchronous component can be kept at normal temperature, saving electricity. Therefore, in high-temperature weather, the heat dissipation efficiency of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism in the ring network cabinet can be further enhanced to avoid the high external temperature of the ring network cabinet affecting the heat dissipation effect of the isolation knife group, vacuum circuit breaker and permanent magnet mechanism in the ring network cabinet, further ensuring the heat dissipation efficiency in the ring network cabinet. When the humidity in the cabinet is high, the drying component can dry the wind force generated by the synchronous component, so that the isolation knife group, vacuum circuit breaker and permanent magnet mechanism in the ring network cabinet can be dried at the same time to avoid the isolation knife group, vacuum circuit breaker and permanent magnet mechanism being affected by moisture and enhancing the heat dissipation effect in the ring network cabinet. When the cabinet is relatively dry, the drying component can be disabled to save the use of desiccant. 3. The cable room and operation room of the cabinet are arranged on the left and right, which can free up space at height and avoid the cabinet from blocking the side view of pedestrians and vehicles due to its height, 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 room, it can be avoided as much as possible that the spark fault in the cable room quickly spreads to the operation room, which can give staff time to deal with it and reduce the risk of overall damage to the ring network cabinet. When the energy storage voltage of the permanent magnet mechanism of the alarm mechanism exceeds the rated value, the ring network cabinet can be alarmed to remind staff to conduct inspections to avoid accidents caused by the ring network cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 A cross-sectional view of the cabinet connection structure in the embodiment of the present application; Figure 3 Appearance diagram of the heat dissipation box connection structure in the embodiment of the present application; Figure 4 A cross-sectional view of the heat dissipation box connection structure in an embodiment of the present application; Figure 5 Embodiments of the present application Figure 3 Enlarged view of point A in the middle.

[0027] Figure 1: Cabinet; 2: Permanent magnet mechanism; 3: Vacuum circuit breaker; 4: Isolating knife group; 5: Terminal group; 6: Isolating 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: Fixed cover; 23. Refrigerator; 24. Cooling pipe; 25. Grid tube; 26. Desiccant box; 27. Sealing cover; 28. Smart push rod; 29. Heating block; 30. Driving block; 31. Connecting block; 32. Battery; 33. Photovoltaic panel; 34. Connecting pipe; 35. Heat dissipation pipe; 36. Fixed block; 37. Adjusting block; 38. Connecting rod; 39. Adjusting plate; 40. Control switch; 41. Electric push rod; 42. Limit block; 43. Humidity sensor. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-5 This application is described in further detail.

[0029] The present application discloses a rear-outlet ring main unit for smart grid power distribution, referring to Figure 1 and Figure 2 , including a cabinet 1, a terminal group 5, an isolating knife group 4, a vacuum circuit breaker 3, a permanent magnet mechanism 2, an isolating mechanism 6 and an auxiliary mechanism 7, and an alarm mechanism for driving the isolating mechanism 6 to sound an alarm. The cabinet 1 is provided with a heat dissipation mechanism for synchronously dissipating heat from the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2; the heat dissipation mechanism includes a heat dissipation box 21 fixed in the cabinet 1, a connecting pipe 34 connected to the heat dissipation box 21, and three heat dissipation pipes 35 connected to the connecting pipe 34, a blowing component for blowing air into the three heat dissipation pipes 35, and an air volume component for adjusting the air volume in the three heat dissipation pipes 35 respectively. , a temperature control component for adjusting the wind temperature and a drying component for drying the wind; the blowing component includes a plurality of fan blades 20 rotatably arranged in the heat dissipation box 21 and a synchronization component for synchronously driving the plurality of fan blades 20 to rotate; the air volume component includes an adjustment plate 39 movably arranged on three heat dissipation tubes 35 and a lifting component for lifting and lowering the adjustment plate 39; the temperature control component includes a grid tube 25 fixed in the heat dissipation box 21, a refrigerator 23 for cooling the liquid in the grid tube 25, a driving component for timing driving the refrigerator 23 and a heat dissipation component for dissipating heat from the refrigerator 23.

[0030] The synchronizer includes a plurality of first bevel gears 19, a plurality of second bevel gears 18 and a rotating shaft 17 that are rotatably arranged in the heat dissipation box 21, and a motor 16 fixed on the cabinet body 1. The plurality of fan blades 20 are coaxially fixed with the plurality of first bevel gears 19, respectively. The plurality of first bevel gears 19 are respectively meshed with the plurality of second bevel gears 18. The plurality of 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. The plurality of fan blades 20 are all located above the grid tube 25.

[0031] The lifting member includes a fixed block 36 fixed on the three heat dissipation tubes 35, an adjusting block 37 fixed in the fixed block 36, and a connecting rod 38 fixed on the adjusting block 37. The three connecting rods 38 are fixedly connected to the three adjusting plates 39 respectively. There is an air gap between the adjusting plate 39 and the heat dissipation tube 35. The three heat dissipation tubes 35 are provided with a convex groove. The three adjusting plates 39 are slidably connected to the three convex grooves respectively. The three heat dissipation tubes 35 are respectively located on the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2. The three fixed blocks 36 are respectively connected to the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2. The three heat dissipation tubes 35 are provided with a sliding hole with the same diameter as the connecting rod 38. The three connecting rods 38 are slidably connected to the three sliding holes respectively. The different heights arranged in the cabinet 1 can avoid heat accumulation in the cabinet 1, and can allow wind to circulate quickly to various areas in the cabinet 1. The space in the cabinet 1 can be fully utilized to avoid mutual interference between the three heat pipes 35, and the heat dissipation speed of components such as the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 in the cabinet 1 can be accelerated. Since hot air rises, the top temperature is often higher than the bottom. The heat pipes 35 at different heights can dissipate heat in different areas respectively to achieve a more uniform heat dissipation effect. Even if the temperature at each height in the cabinet 1 is different, the three heat pipes 35 can also achieve different heat dissipation effects by detecting and adjusting the temperature through the adjustment block 37, so that the three heat pipes 35 can dissipate heat to the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 respectively with the best wind force.

[0032] The driving component includes a photovoltaic panel 33 and a 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 induction switch arranged on the battery 32 and a cooling pipe 24 fixed on the refrigerator 23. The photovoltaic panel 33 and the refrigerator 23 are both electrically connected to the battery 32. The refrigerator 23 is fixedly connected to the cabinet 1. The cooling pipe 24 is located on the inner side of the grid pipe 25. A control valve is installed on the grid pipe 25. By adjusting the control valve, the liquid in the grid pipe 25 can be released and replaced. The left side of the grid pipe 25 is connected to the cabinet 1. A fixing hole with a diameter equal to that of the connecting block 31 is opened on the heated 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 fitted with the induction switch. The induction switch is a telescopic switch.

[0033] The drying component includes a desiccant box 26 fixed in the heat dissipation box 21, a sealing cover 27 slidably set on the desiccant box 26, and an intelligent push rod 28 fixed on the sealing cover 27. The intelligent push rod 28 is fixedly connected to the heat dissipation box 21. The sealing cover 27 is provided with air outlet holes arranged at equal distances. The desiccant box 26 is provided with connecting holes arranged at equal distances. Multiple air outlet holes are movably fitted with multiple connecting holes respectively. A humidity sensor 43 is installed in the cabinet 1. The humidity sensor 43 is electrically connected to the intelligent push rod 28. A connecting plate is provided on the desiccant box 26, and a mounting plate is provided on the heat dissipation box 21. When desiccant needs to be added 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 grid tube 25.

[0034] The heat dissipation component includes a fixed cover 22 fixed on the heat dissipation box 21. The fan blade 20 located on the far left among the multiple fan blades 20 is a heat dissipation blade. The refrigerator 23 and the heat dissipation blade are both located on the inner side of the fixed cover 22. The outlet of the fixed cover 22 is located on the outside of the cabinet 1. The cabinet 1 is provided with an air inlet and a vent. The air inlet and the vent are both provided with rain shields, which can minimize rainwater and particles from entering the cabinet 1, while ensuring the ventilation and heat dissipation effect in the cabinet 1.

[0035] A cable room and an operating room are provided on the cabinet 1. The isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 are all located in the operating room. The connection end of the terminal group 5 and the isolating knife group 4 is located in the operating room. The terminal of the terminal group 5 is located in the cable room. A waterproof board is provided on the operating room. By providing the waterproof board on the operating room, rainwater can be prevented from intruding into the operating room.

[0036] The alarm mechanism includes a connecting frame 9 slidably arranged on the auxiliary mechanism 7, a movable frame 11 slidably arranged on the isolation mechanism 6, a movable member for lifting the connecting frame 9, a translation member and a connecting member for lifting the movable frame 11; The movable part includes a movable handle 8 rotatably arranged on the auxiliary mechanism 7 , and the isolation mechanism 6 and the movable handle 8 are both movably fitted with the connecting frame 9 .

[0037] The translation part includes a support frame 13 and a sliding rod 14 slidingly arranged on the cabinet body 1, a telescopic spring 10 fixed on the movable frame 11 and a movable rod 15 hinged on the sliding rod 14. A threaded rod 12 is threadedly connected to the cabinet body 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.

[0038] The connecting parts include an electric push rod 41 fixed on the cabinet 1 and a limit block 42 fixed on the electric push rod 41. The three heat dissipation tubes 35 are fixedly connected with a control switch 40. The three control switches 40 are electrically connected to the electric push rod 41. A limit hole is provided on the inner side of the limit block 42. The sliding rod 14 and the movable rod 15 are both slidably connected to the limit hole. The hinge between the sliding rod 14 and the movable rod 15 is located in the middle of the limit hole. The three control switches 40 are respectively movably fitted to the three adjustment plates 39. The three control switches 40 are respectively located in the convex grooves of the three heat dissipation tubes 35.

[0039] The cabinet 1 is provided with a video sensor, a moisture sensor, an intelligent controller and an alarm. The video sensor can monitor the operation status of the power line in the cabinet 1 in real time, automatically judge, and take actions to protect the line and equipment. The moisture sensor detects whether there is liquid infiltration in the 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 in the cabinet 1, the moisture sensor detects liquid infiltration in the cabinet 1 and transmits a signal to the intelligent controller to transmit the signal to inform the staff that a fault has occurred in the cabinet 1. At the same time, the alarm will be triggered to warn passers-by to pay attention to safety, and the connector can be activated to cut off the power to the isolation mechanism 6, so that the ring network cabinet can be powered off to ensure the safety of the ring network cabinet.

[0040] The ring main unit is used on the street. The internal temperature of the ring main unit can reach up to 120°C when it is working. Due to the influence of weather, the external temperature of the ring main unit can reach up to 100°C. Therefore, the material of the adjustment block 37 is preferably high-temperature plastic. Under other working conditions, epoxy resin, composite materials and natural rubber can also be selected. Any material that can expand and contract within 120°C can be used. Therefore, the material of the drive block 30 is preferably polymer plastic. Under other working conditions, styrene-butadiene rubber, nitrile rubber and ethylene-propylene rubber can also be selected. Any material that can withstand expansion and contraction within 100°C can be used. The selected materials have excellent high-temperature performance, mechanical strength, fatigue resistance and corrosion resistance, which can ensure that the adjustment block 37 and the drive block 30 can be used for a long time, ensuring the use of the adjustment block 37 and the drive block 30. Lifespan, can ensure the effect of temperature detection by the adjustment block 37 and the drive block 30. The method of controlling the air outlet of the pipeline according to the temperature in the prior art is usually to use a temperature sensor to control the solenoid valve to achieve it, but the temperature sensor will be interfered with by the electromagnetic field in a high temperature environment and when it is set next to the permanent magnet mechanism 2, the vacuum circuit breaker 3 and the isolation knife group 4, and then the air outlet of the electric control pipeline will affect its accuracy, and the effect of wind control cannot be guaranteed. Moreover, if the temperature sensor is set on the cabinet 1 to detect the weather, it will often be exposed to sunlight and eroded by rain, which will affect its service life. Compared with the temperature sensor and solenoid valve to control the wind force, the mechanical linkage structure to control the wind force has the advantages of high reliability, fast response speed, no need for external energy, low cost and good environmental adaptability.

[0041] A trigger is provided on the isolation mechanism 6, and the isolation knife group 4 and the vacuum circuit breaker 3 can be configured in coordination. When the vacuum circuit breaker 3 and the isolation knife group 4 are closed, the normal operation of the ring network cabinet can be ensured. When the isolation knife group 4 and the vacuum circuit breaker 3 are not closed, the ring network cabinet can be kept in an unpowered state to ensure that the staff can operate to avoid electric shock. The vacuum circuit breaker 3 has the characteristics of fast power off and not easy to be damaged. It can cut off or connect the circuit under high voltage, play a role in protecting equipment and preventing accidents. The isolation knife group 4 is mainly used to isolate the power supply to ensure that the staff can operate safely during equipment maintenance or fault handling. The permanent magnet mechanism 2 can realize the fast opening and closing operation of the isolation knife group 4 to cut off the fault current. The permanent magnet mechanism 2 is used in conjunction with the isolation knife group 4. The permanent magnet mechanism 2 can ensure that the ring network cabinet can quickly cut off or connect the circuit when needed, thereby protecting the safe operation of the power grid. The auxiliary mechanism 7 plays a role in supporting and assisting the permanent magnet mechanism 2 and the isolation knife group 4 in the ring network cabinet. When the vacuum circuit breaker 3, the isolation knife group 4, the permanent magnet mechanism 2, the auxiliary mechanism 7 and the isolation mechanism 6 are jointly driven, they work together to ensure the efficient and stable operation of the ring network cabinet, and can achieve precise control and protection of the circuit. When the ring network cabinet fails in the power grid, these mechanisms can respond quickly, cut off the fault circuit, prevent the accident from expanding, and thus protect the safe operation of the power grid. When the energy storage voltage of the permanent magnet mechanism 2 exceeds the rated value, it will drive the movable handle 8 to rotate, and then the connecting frame 9 can be brought into contact with the trigger on the isolation mechanism 6, which can trigger the alarm to sound an alarm and remind the staff to conduct inspections to prevent the ring network cabinet from causing accidents. At the same time, the locking operation can be performed and the vacuum circuit breaker 3 can be driven to open to avoid chain damage and catastrophic accidents.

[0042] The implementation principle of a rear-outlet ring main unit for smart grid power distribution in the embodiment of the present application is as follows: (1) When the ring network cabinet 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 force, and then the wind force can 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 force on the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 respectively, and the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 can be blown and cooled first. At the same time, the wind force will circulate and float in the cabinet 1 after passing through the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2, and other components in the cabinet 1 can also be cooled to ensure the heat dissipation effect inside the ring network cabinet; (2) When the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 are driven, the heat of the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 will be respectively transferred to the three fixed blocks 36 for heating. When the three fixed blocks 36 are heated, the heat will be transferred to the three adjustment blocks 37 respectively. The three adjustment blocks 37 can respectively detect the heat of the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2. When the temperature detected by the adjustment block 37 is high, the adjustment block 37 will expand due to the high temperature. Through the expansion and contraction of the adjustment block 37, the three adjustment blocks 37 can change respectively due to the change of the temperature of the isolating knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2. The expansion and contraction of the adjustment block 37 will drive the connecting rod 38 and the adjustment plate 39 to move in turn, and the size of the air gap between the heat pipe 35 and the adjustment plate 39 can be adjusted. The higher the temperature of the adjustment block 37 is heated, the greater the expansion. The greater the range in which the adjustment plate 39 moves into the convex groove, the larger the air gap becomes, and the greater the air volume discharged by the heat dissipation pipe 35. Therefore, the heat generated by the drive of the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2 can be used to control the air volume discharged by the heat dissipation pipe 35 respectively. The higher the heat generated by the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2, the higher the air volume discharged by the heat dissipation pipe 35. This can enhance the heat dissipation effect of the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2, and prevent the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2 from aging and being damaged by high temperature. On the contrary, when the heat generated by the drive of the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2 is low, the air volume discharged by the heat dissipation pipe 35 is low, and this can prevent the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2 from excessive heat dissipation, which could cause mechanical jamming of the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2, and poor contact of the contacts, thereby ensuring the performance of the isolation blade group 4, the vacuum circuit breaker 3, and the permanent magnet mechanism 2. (3) When the ring network cabinet is installed on the street, the ambient temperature will affect the drive of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 in the ring network cabinet. When the weather temperature is high, the heat from the light and the outside of the cabinet 1 will be transferred to the heating block 29 for heating. At the same time, when the temperature inside the ring network cabinet is too high, it will also be transferred to the outside of the ring network cabinet. When the heating block 29 is heated, it will transfer the 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. The expansion and contraction of the driving block 30 can cause the driving block 30 to change due to the external weather and the temperature outside the cabinet 1. The expansion and contraction of the driving block 30 will drive the connecting block 31 to move. When the connecting block 31 moves, it will contact and squeeze the induction switch on the battery 32 to drive the battery 32, and then drive the refrigerator 23 to cool the cooling pipe 24. The cooling pipe 24 can cool the liquid in the grid pipe 25 and generate cold air on the outside of the grid pipe 25. Therefore, when the multiple fan blades 20 rotate to generate wind, the cold air on the outside of the grid pipe 25 can be blown away to form cold wind, which can cool the wind. Therefore, when the temperature is low, the fan blades 20 can rotate to generate wind. In hot weather, the heat dissipation efficiency of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 in the ring network cabinet can be further enhanced to avoid the external temperature of the ring network cabinet being too high and affecting the heat dissipation effect of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 in the ring network cabinet, further ensuring the heat dissipation efficiency in the ring network cabinet. The photovoltaic panel 33 can absorb light and convert it into electrical energy to power the battery 32, so that the refrigerator 23 can continue to work in hot weather to ensure the effect of wind cooling. At the same time, when the weather temperature is low and the heat outside the cabinet 1 is low, the heating block 29 will not be heated to drive the connecting block 3 1 moves, the refrigerator 23 will not be driven, and the temperature inside the grid tube 25 will be maintained at room temperature. The refrigerator 23 can be controlled according to the weather temperature, which can save the use of electric energy resources. The refrigerator 23 does not need to be continuously driven, thereby enhancing the heat dissipation effect in the ring network cabinet and avoiding excessive local temperature rise in the ring network cabinet. The heat dissipation levels of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2 can be controlled respectively 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 network cabinet, thereby avoiding insufficient heat dissipation or excessive heat dissipation of the isolation knife group 4, vacuum circuit breaker 3 and permanent magnet mechanism 2; (4) The humidity in the cabinet 1 can be detected by the humidity sensor 43. When the humidity in the cabinet 1 is high, the sealing cover 27 can be driven to move by the intelligent push rod 28 so that the multiple air outlet holes on the sealing cover 27 correspond to the multiple connection holes on the desiccant box 26, so that the desiccant box 26 is in an open state. Then, when the multiple fan blades 20 rotate to generate wind, the desiccant in the desiccant box 26 can be quickly dissipated, and the wind can be dried. Therefore, when the humidity in the cabinet 1 is high, the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 in the ring network cabinet can be cooled and dried at the same time, so as to avoid the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 being affected by moisture. At the same time, when the cabinet 1 is relatively dry, the sealing cover 27 can be driven to move by the intelligent push rod 28 so that the multiple air outlet holes on the sealing cover 27 and the multiple connection holes on the desiccant box 26 are misaligned with each other, so that the desiccant box 26 can be completely closed, so as to avoid the use of the desiccant in the desiccant box 26 when the cabinet 1 is relatively dry, thus saving the use of desiccant. (5) The wind generated by the rotation of the heat dissipation blades will flow in the fixed cover 22, and the flow of wind can dissipate heat for the refrigerator 23, thereby ensuring the driving effect of the refrigerator 23 and preventing the refrigerator 23 from being damaged due to continuous operation; (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, thereby alarming the ring network cabinet and reminding the staff to conduct inspections to avoid accidents caused by the ring network cabinet; (7) When the staff needs to operate the terminal group 5, the threaded rod 12 is rotated to rotate downward, which can make the support frame 13 move downward along the cabinet body 1, so that the support frame 13 loses its pressing force on the sliding rod 14, and then the elastic force of the telescopic spring 10 can drive the movable frame 11 to move upward along the isolation mechanism 6, and then drive the movable rod 15 and the sliding rod 14 to move to the right. The movable frame 11 is separated from the isolation mechanism 6, and the ring network cabinet can be disconnected to avoid electric shock when the staff operates the terminal group 5, ensuring the safety of the staff. When the staff needs to operate the electronic components inside the ring network cabinet, When the components are removed, the isolation mechanism 6 can be directly operated to cut off the power to the ring network cabinet. When the sliding rod 14 and the movable frame 11 move the movable rod 15, the hinge of the movable rod 15 and the sliding rod 14 can be kept in the limit block 42 for sliding. Because the range of movement of the movable rod 15 driven by the sliding rod 14 and the movable frame 11 is not very large, the hinge of the sliding rod 14 and the movable rod 15 can be limited by the limit hole in the limit block 42, avoiding the swing of the movable rod 15 when the sliding rod 14 and the movable frame 11 drive the movable rod 15 to move, and avoiding accidents when the terminal group 5 cuts off the power to the isolation mechanism 6; (8) When the refrigerator 23 fails and cannot produce cold air for liquid cooling or a fire occurs in the cabinet 1, it is difficult to reduce the temperature of the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2. At this time, the temperature of the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2 in the cabinet 1 will increase. Then, when the three adjustment blocks 37 respectively detect the temperature of the isolation knife group 4, the vacuum circuit breaker 3 and the permanent magnet mechanism 2, they will drive the three adjustment plates 39 to move upward to the limit position. The three adjustment plates 39 will contact the three control switches 40 respectively. When the three control switches 40 are driven at the same time, it means that the cabinet 1 The temperature inside has reached the limit and a fault has occurred, and then the three control switches 40 will drive the electric push rod 41, which can drive the limit block 42 to move to the right through the electric push rod 41, so that the limit block 42 moves on the sliding rod 14, and the hinge of the sliding rod 14 and the movable rod 15 can be moved out of the limit block 42, so that the movable rod 15 loses 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, and then the movable rod 15 can be driven to swing at an angle, so that the movable frame 11 is separated from the isolation mechanism 6, and the ring network cabinet can be alarmed and circuit-breakered, thereby ensuring the safety of use in the cabinet body 1; (9) The cable room and operation room of cabinet 1 are arranged on the left and right, which can free up space at height and avoid the cabinet 1 blocking the side view of pedestrians and vehicles due to its height, thereby ensuring the safety of vehicle driving. In addition, the high voltage and low voltage can be completely separated, which can improve the safety performance of the operator. When a spark fault occurs in the cable room, the spark fault in the cable room can be avoided from spreading quickly to the operation room, which can give the staff time to deal with it and reduce the risk of overall damage to the ring network cabinet.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A rear-outlet ring main unit for smart grid power distribution, characterized by: The invention comprises a cabinet (1), a terminal group (5) arranged on the cabinet (1), an isolating knife group (4), a vacuum circuit breaker (3), a permanent magnet mechanism (2), an isolating mechanism (6), an auxiliary mechanism (7), and an alarm mechanism for driving the isolating mechanism (6) to alarm, wherein the cabinet (1) is provided with a heat dissipation mechanism for synchronously dissipating heat from the isolating knife group (4), the vacuum circuit breaker (3), and the permanent magnet mechanism (2); The heat dissipation mechanism comprises a heat dissipation box (21) fixed in 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 component for blowing air into the three heat dissipation pipes (35), an air volume component for adjusting the air volume in the three heat dissipation pipes (35), a temperature control component for adjusting the wind temperature, and a drying component for drying the wind. The blowing assembly comprises a plurality of fan blades (20) rotatably arranged in a heat dissipation box (21) and a synchronizing member for driving the plurality of fan blades (20) to rotate synchronously; The air volume assembly comprises adjustment plates (39) movably arranged on the three heat dissipation pipes (35) and a lifting member for lifting and lowering the adjustment plates (39); The temperature control assembly comprises a grid tube (25) fixed in a heat dissipation box (21), a refrigerator (23) for cooling liquid in the grid tube (25), a driving member for timing driving the refrigerator (23), and a heat dissipation member for dissipating heat from the refrigerator (23).

2. The rear-outlet type ring main unit for smart grid power distribution 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) rotatably arranged in a heat dissipation box (21), and a motor (16) fixed to a cabinet (1); the plurality of fan blades (20) are respectively coaxially fixed with the plurality of first bevel gears (19); the plurality of first bevel gears (19) are respectively meshed with the plurality of second bevel gears (18); the plurality of second bevel gears (18) are all fixedly connected to the rotating shaft (17); and the rotating shaft (17) is fixedly connected to an output shaft of the motor (16).

3. The rear-outlet type ring main unit for smart grid power distribution according to claim 1, characterized in that: The lifting member comprises a fixing block (36) fixed on the three heat dissipation tubes (35), an adjusting block (37) fixed in the fixing block (36), and a connecting rod (38) fixed on the adjusting block (37). The three connecting rods (38) are fixedly connected to the three adjusting plates (39), respectively. An air gap is provided between the adjusting plates (39) and the heat dissipation tubes (35). The three fixing blocks (36) are respectively connected to the isolating knife group (4), the vacuum circuit breaker (3), and the permanent magnet mechanism (2).

4. The rear-outlet type ring main unit for smart grid power distribution according to claim 1, characterized in that: The driving component includes a photovoltaic panel (33) and a battery (32) arranged on the cabinet (1), a cooling pipe (24) fixed on the refrigerator (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 arranged on the battery (32), and a cooling pipe (24) fixed on the refrigerator (23). The photovoltaic panel (33) and the refrigerator (23) are both electrically connected to the battery (32), the refrigerator (23) is fixedly connected to 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 fitted with the inductive switch.

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

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

7. The rear-outlet type ring main unit for smart grid power distribution according to claim 1, characterized in that: The cabinet (1) is provided with a cable room and an operating room. The isolating knife group (4), the vacuum circuit breaker (3) and the permanent magnet mechanism (2) are all located in the operating room. The connection end of the terminal group (5) and the isolating knife group (4) is located in the operating room. The connection end of the terminal group (5) is located in the cable room.

8. The rear-outlet type ring main unit for smart grid power distribution according to claim 1, characterized in that: The alarm mechanism comprises a connecting frame (9) slidably arranged on the auxiliary mechanism (7), a movable frame (11) slidably arranged on the isolation mechanism (6), a movable member for lifting the connecting frame (9), a translation member and a connecting member for lifting the movable frame (11); The movable part comprises a movable handle (8) rotatably arranged on the auxiliary mechanism (7), and the isolation mechanism (6) and the movable handle (8) are both movably fitted with the connecting frame (9).

9. The rear-outlet type ring main unit for smart grid power distribution according to claim 8, characterized in that: The translation member comprises a support frame (13) and a sliding rod (14) slidably arranged on the cabinet body (1), a telescopic spring (10) fixed on the movable frame (11), and a movable rod (15) hinged on the sliding rod (14); a threaded rod (12) is threadedly connected to the cabinet body (1); the threaded rod (12) is movably fitted with 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 fitted with the arc surface of the support frame (13); the movable rod (15) is movably fitted with the arc surface of the movable frame (11); and the telescopic spring (10) is fixedly connected to the isolation mechanism (6).

10. The rear-outlet type ring main unit for smart grid power distribution according to claim 9, characterized in that: The connecting member includes an electric push rod (41) fixed on the cabinet (1), a limit block (42) fixed on the electric push rod (41), and the three heat dissipation tubes (35) are fixedly connected with a control switch (40). The three control switches (40) are electrically connected to the electric push rod (41). A limit hole is provided on the inner side of the limit block (42). The sliding rod (14) and the movable rod (15) are both slidably connected to the limit hole. The hinge of the sliding rod (14) and the movable rod (15) is located in the middle of the limit hole. The three control switches (40) are respectively movably fitted to the three adjustment plates (39).

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