Compact environment-friendly gas-insulated totally-enclosed ring main unit

Abstract

The invention discloses a compact environment-friendly gas-insulated totally-enclosed ring main unit, and relates to the technical field of ring main units, in particular to a compact environment-friendly gas-insulated totally-enclosed ring main unit, which comprises a cabinet body, fins, a cleaning mechanism and an engineering dry air mechanism, fins achieve heat dissipation of the cabinet body, the cleaning mechanism cleans dust on the fins through a rolling brush, a spray head at the bottom of a first pipeline can wet the rolling brush when a temperature sensor detects that the temperature exceeds 50 DEG C, and a support is matched with the spray head to move up and down to achieve the dual functions of cleaning and cooling. The engineering dry air mechanism preheats air through a heating pipe and a heating wire of a second pipeline, then the air is dehydrated and air-dried through a small thermal cycle air bellow, generated dry air is introduced into an air box for insulation arc extinguishing, and meanwhile the temperature of the air box is controlled to guarantee the insulation performance. The ring main unit is compact in structure, dry air is non-toxic and non-combustible, greenhouse effect is avoided, and the ring main unit is environment-friendly, reliable in operation and suitable for various power distribution scenes.

Description

Technical Field

[0001] This invention relates to the field of ring main unit technology, specifically a compact, environmentally friendly, gas-insulated, fully enclosed ring main unit. Background Technology

[0002] With the increasing demands for environmental protection and equipment operational stability in the power industry, existing gas-insulated ring main units have gradually revealed numerous problems. Traditional ring main units mostly use SF6 gas as the insulating and arc-quenching medium, which has an extremely high global warming potential. Leaks would cause serious environmental hazards, and the cost of recycling and disposal is high, making it difficult to meet current environmental policy requirements. In terms of heat dissipation, traditional heat dissipation components are prone to dust accumulation, leading to decreased heat dissipation efficiency and inconvenient dust cleaning. At the same time, some heat dissipation structures rely solely on natural ventilation, resulting in limited cooling effects and affecting the normal operation of the equipment. In addition, most ring main unit cabinets have insufficiently compact cabinet designs, occupying a large amount of space, making them unsuitable for space-constrained application scenarios such as urban residential communities and high-rise buildings. Therefore, we propose a compact, environmentally friendly, gas-insulated, fully enclosed ring main unit. Summary of the Invention

[0003] This invention provides a compact, environmentally friendly, gas-insulated, fully enclosed ring main unit that solves the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A compact, environmentally friendly, gas-insulated, fully enclosed ring main unit includes a cabinet body. The cabinet body is internally divided into multiple chambers. The bottom chamber is a cable chamber, the rear side above the cable chamber is a gas box, the front side above the cable chamber is a mechanism chamber, and the top of the mechanism chamber is a relay chamber. The left, right, and rear outer walls of the cabinet body are equipped with arrayed fins arranged from top to bottom. Each of the three outer walls is equipped with a cleaning mechanism that can clean dust from the fin surface and moisten and cool the fins. The mechanism chamber is equipped with an engineering air drying mechanism that can dehydrate and dry the air and replenish the gas box. The cleaning mechanism includes a support, a pipe, and a roller brush. The support is installed on the left, right, and rear outer walls of the cabinet body. The lower end of the support is rotatably connected to the roller brush. The upper end of the support is connected to the roller brush, and the pipe is installed between the upper end of the support and the roller brush. An array of spray heads is installed at the bottom of the pipe. The roller brush can clean the fins and moisten and cool them.

[0005] Preferably, the engineering drying mechanism includes a small hot air circulation box, a second pipe, a heating tube, an air inlet, and a heating wire. The small hot air circulation box is installed at the bottom of the mechanism chamber, and the second pipe is installed on the right side of the small hot air circulation box. An air inlet is installed at the end of the second pipe, and a spiral heating wire is installed inside the air inlet. An opening is provided on the front side wall of the cabinet at the mechanism chamber, and the air inlet is connected to the opening. The heating tube is sleeved on the outer surface of the second pipe.

[0006] Preferably, the engineering drying mechanism further includes a compressor, an air storage tank, and a third pipeline. The compressor is located on the left side of the small hot air circulation box, and the air storage tank is located on the rear side of the compressor. The small hot air circulation box, the compressor, and the air storage tank are connected by a third pipeline. The end of the third pipeline passes through the rear side wall of the mechanism chamber and extends into the air box. A mounting bracket is slidably connected to the air box.

[0007] Preferably, a second slide rail is vertically installed at the corner of the outer wall of the cabinet, and a bracket is slidably connected between the two slide rails. A platform is installed at the end of the bracket, and a motor is installed on the top of the platform. The end of the roller brush passes through the bracket and is fixedly connected to the output shaft of the motor. A water tank is installed in the middle of the top of the cabinet, and a flexible hose connects the first pipe to the water tank.

[0008] Preferably, a lead screw is rotatably connected to the middle of the slide rail two. The top of the lead screw passes through the top of the cabinet and extends out. A helical gear one is installed on the outer surface of the top of the lead screw. A motor two is installed on one side of the helical gear one on the top of the cabinet. A helical gear two is installed on the output shaft of the motor two. The helical gear two meshes with the helical gear one. A protective cover is installed around the helical gear one, helical gear two, and motor two on the top of the cabinet. The lead screw is threadedly connected to the bracket.

[0009] Preferably, a plug-in block is inserted into the opening on the front side wall of the cabinet, a filter plate is installed in the middle of the inner surface of the plug-in block, and an air filter element is installed in the middle of one side wall of the filter plate. When the plug-in block is inserted, the air filter element can pass through the air inlet and extend into the second pipe. A round hole is opened above the opening on the front side wall of the cabinet, and a fan is installed on the outer wall of the round hole.

[0010] Preferably, multiple connection ports are installed from top to bottom on the upper rear end of the right outer side wall of the cabinet, and a sealing cover is provided on the outside of the connection port. The sealing cover is connected to the cabinet by bolts.

[0011] Preferably, connecting blocks 1 are symmetrically installed on the left and right sides of the top of the cabinet at the rear of the water tank, and connecting block 2 is installed in the middle of the bottom of the cabinet. When multiple cabinets are connected, they can be connected and fixed by connecting blocks 1 and connecting blocks 2.

[0012] Preferably, the cabinet body is provided with symmetrical slide rails on the front and back sides of the bottom, and each slide rail is slidably connected to a slider. The top of the slider is fixedly connected to the bottom of the cabinet body. When multiple cabinet bodies are connected, they can be docked by the cooperation of the slider and the slide rail.

[0013] Preferably, a temperature sensor and a pressure sensor are installed on the top of the cabinet above the air box.

[0014] The present invention has the following beneficial effects: 1. This compact, environmentally friendly, gas-insulated, fully enclosed ring main unit uses arrayed fins to efficiently dissipate heat from the entire unit. The cleaning mechanism achieves dual functions through a roller brush and a spray nozzle on the pipeline. The roller brush cleans dust from the fins to prevent heat dissipation from being obstructed, and it can also automatically wet the roller brush to cool it down at high temperatures, greatly improving the heat dissipation stability of the unit and reducing the frequency of maintenance.

[0015] 2. This compact, environmentally friendly, gas-insulated, fully enclosed ring main unit uses dry air prepared by an engineering dry air mechanism to replace SF6 gas. This dry air is non-toxic, non-flammable, and has no greenhouse effect, completely solving the environmental hazards of traditional gases. At the same time, the preheating and dehydration process ensures the dryness of the air, and the gas box temperature control ensures stable insulation and arc extinguishing performance.

[0016] 3. This compact, environmentally friendly, gas-insulated, fully enclosed ring main unit features a compact internal structure design, reducing installation space requirements. It is suitable for space-constrained scenarios such as urban residential communities and high-rise buildings, combining environmental friendliness, reliability, and practicality, while reducing operating and environmental compliance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an enlarged structural diagram of point A in the present invention; Figure 3 This is a schematic diagram of the rear side structure of the present invention; Figure 4 This is an enlarged structural diagram of section B in the present invention; Figure 5 This is a schematic cross-sectional view of the present invention; Figure 6 This is a schematic diagram of the dry air mechanism structure of the present invention; Figure 7 This is an enlarged structural diagram at point C of the present invention; In the diagram: 1. Cabinet; 2. Slider; 3. Slide rail one; 4. Slide rail two; 5. Bracket; 6. Protective cover; 7. Water tank; 8. Roller brush; 9. Pipe one; 10. Lead screw; 11. Platform one; 12. Motor one; 13. Connection port; 14. Sealing cover; 15. Temperature sensor; 16. Air pressure sensor; 17. Connecting block one; 18. Helical gear one; 19. Helical gear two; 20. Motor two; 21. Relay compartment; 22. Air box; 23. Mechanism compartment; 24. Cable compartment; 25. Connecting block two; 26. Mounting bracket; 27. Small heat circulation air box; 28. Pipe two; 29. ​​Heating tube; 30. Air inlet; 31. Heating wire; 32. Connecting block; 33. Filter plate; 34. Air filter element; 35. Compressor; 36. Air tank; 37. Fan; 38. Pipe three; 39. Fins. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 7 This invention provides a compact, environmentally friendly, gas-insulated, fully enclosed ring main unit, comprising a cabinet 1. The cabinet 1 is internally divided into multiple chambers. The bottom chamber is a cable chamber 24, the rear side above the cable chamber 24 is a gas box 22, the front side above the cable chamber 24 is a mechanism chamber 23, and the top of the mechanism chamber 23 is a relay chamber 21. The left, right, and rear outer walls of the cabinet 1 are equipped with arrayed fins 39 arranged from top to bottom. Cleaning mechanisms are provided on all three outer walls to clean dust from the surface of the fins 39. It can also humidify and cool the fins 39. The interior of the mechanism chamber 23 is equipped with an engineering air drying mechanism, which can dehydrate and dry the air and replenish the air into the air box 22. The cleaning mechanism includes a bracket 5, a pipe 9, and a roller brush 8. The bracket 5 is installed on the left and right rear outer walls of the cabinet 1. The lower end of the bracket 5 is rotatably connected to the roller brush 8. The upper end of the bracket 5 is connected to the roller brush 8. The pipe 9 is installed between the upper end of the bracket 5 and the roller brush 8. The bottom of the pipe 9 is equipped with an array of spray heads. The roller brush 8 can clean the fins 39 and humidify and cool them.

[0020] Based on the above, the cabinet 1 achieves independent operation and safe isolation of each functional module through a compact design with layered and compartmentalized sections; the fins 39 achieve normal natural heat dissipation by increasing the heat dissipation area; the cleaning mechanism completes the dust cleaning of the fins 39 through the cooperation of the rotation of the roller brush 8 and the movement of the bracket 5; when the temperature is high, the water tank 7 supplies water to the pipe 9 through the hose, and the spray head wets the roller brush 8, so that cleaning and cooling are carried out simultaneously. Furthermore, the functional chambers are clearly divided, ensuring the orderly layout and safe isolation of circuits, equipment, and control components; the array-type fins 39 have high heat dissipation efficiency, and the cleaning mechanism integrates cleaning and cooling functions, eliminating the need for additional cooling equipment, simplifying the structure while improving heat dissipation stability and reducing the frequency of manual maintenance.

[0021] Please see Figures 1 to 7 The engineering drying mechanism includes a small hot air circulation box 27, a second pipe 28, a heating tube 29, an air inlet 30, and a heating wire 31. The small hot air circulation box 27 is installed at the bottom of the mechanism chamber 23. The second pipe 28 is installed on the right side of the small hot air circulation box 27. The air inlet 30 is installed at the end of the second pipe 28. The spiral heating wire 31 is installed inside the air inlet 30. An opening is opened on the front side wall of the cabinet 1 at the mechanism chamber 23. The air inlet 30 is connected to the opening. The heating tube 29 is sleeved on the outer surface of the second pipe 28.

[0022] Based on the above, after the external air enters the air inlet 30 through the inlet, it is preheated twice by the spiral heating wire 31 and the heating tube 29 outside the pipe 28, which raises the temperature of the air and lays the foundation for the dehydration and drying process of the subsequent small hot air circulation box. Furthermore, the dual heating ensures more thorough and uniform air preheating, effectively improving subsequent dehydration and drying efficiency; the 29-set heating tube structure does not occupy extra space and is suitable for the compact layout of the machine chamber; the heating wire 31 adopts a spiral design to increase the contact area with air and improve the heating effect.

[0023] Please see Figures 1 to 7 The engineering drying mechanism also includes a compressor 35, an air tank 36, and a pipe 38. The compressor 35 is located on the left side of the small hot air circulation box 27, and the air tank 36 is located on the rear side of the compressor 35. The small hot air circulation box 27, the compressor 35, and the air tank 36 are connected by a pipe 38. The end of the pipe 38 passes through the rear side wall of the mechanism chamber 23 and extends into the air box 22. The mounting bracket 26 is slidably connected back and forth inside the air box 22.

[0024] Based on the above, the dry air dehydrated by the small hot air circulation box 27 enters the compressor 35 through the pipe 38, is compressed to the set pressure, and is stored in the air storage tank 36 for later use. When the air pressure in the air box 22 is insufficient, the air storage tank 36 replenishes the air box 22 through the pipe 38 to provide an insulating and arc-extinguishing environment for the switching elements. The mounting bracket 26 can slide back and forth to adapt to the installation and maintenance of switching elements of different specifications. Furthermore, the cooperation between compressor 35 and air tank 36 ensures a stable supply and storage of dry air, avoiding efficiency losses caused by frequent preparation; pipe 38 extends directly into air box 22, with a short air replenishment path and low loss; sliding mounting bracket 26 improves equipment adaptability.

[0025] Please see Figures 1 to 2 A slide rail 2 4 is vertically installed at the corner of the outer wall of cabinet 1. A bracket 5 is slidably connected between slide rails 2 4. A platform 11 is installed at the end of the bracket 5. A motor 12 is installed on the top of the platform 11. The end of the roller brush 8 passes through the bracket 5 and is fixedly connected to the output shaft of the motor 12. A water tank 7 is installed in the middle of the top of cabinet 1. A flexible hose connects pipe 9 to water tank 7.

[0026] Based on the above, the motor 12 drives the roller brush 8 to rotate at high speed, providing power for cleaning; the bracket 5 moves up and down through sliding cooperation with the slide rail 4, driving the roller brush 8 to clean the fins 39 in all directions; the water tank 7 serves as a water source, continuously supplying water to the pipe 9 through a hose to meet the needs of humidification and cooling. Furthermore, the slide rail 2 4 provides a stable sliding guide for the bracket 5, preventing deviation during cleaning and ensuring cleaning uniformity; the platform 1 11 provides a stable installation base for the motor 1 12, reducing the impact of vibration; the hose connection method is adapted to the up and down movement of the bracket 5, avoiding damage to the pipeline by pulling; the water tank 7 is placed on the top, using gravity to assist water supply and improve water supply stability.

[0027] Please see Figures 1 to 2 The slide rail 2 4 is internally connected to a lead screw 10. The top of the lead screw 10 passes through the top of the cabinet 1 and extends out. A helical gear 18 is installed on the outer surface of the top of the lead screw 10. A motor 20 is installed on one side of the helical gear 18 on the top of the cabinet 1. A helical gear 29 is installed on the output shaft of the motor 20. The helical gear 219 meshes with the helical gear 18. A protective cover 6 is installed around the outer sides of the helical gear 18, the helical gear 219, and the motor 20 on the top of the cabinet 1. The lead screw 10 is threadedly connected to the bracket 5.

[0028] Based on the above, the operation of motor 20 drives helical gear 219 to rotate, and through meshing transmission with helical gear 18, drives lead screw 10 to rotate axially. Since the support 5 is threadedly engaged with lead screw 10, the rotation of lead screw 10 is converted into the vertical linear movement of support 5 along slide rail 24, achieving full coverage of the cleaning range; the protective cover 6 protects the gear transmission assembly and motor 20 to prevent corrosion from dust, rainwater, etc. Furthermore, the gear transmission structure has a precise transmission ratio and high efficiency, ensuring that the support 5 moves at a uniform speed and improving the cleaning effect; the lead screw 10 has a strong transmission load capacity and stable operation, making it suitable for long-term, high-frequency operation; the protective cover 6 effectively extends the service life of the drive components, reduces the failure rate, and ensures the long-term reliable operation of the cleaning system.

[0029] Please see Figures 1 to 7 A plug-in block 32 is inserted into the opening on the front side wall of the cabinet 1. A filter plate 33 is installed in the middle of the inner surface of the plug-in block 32. An air filter element 34 is installed in the middle of one side wall of the filter plate 33. When the plug-in block 32 is inserted, the air filter element 34 can pass through the air inlet 30 and extend into the pipe 28. A round hole is opened above the opening on the front side wall of the cabinet 1. A fan 37 is installed on the outer wall of the round hole.

[0030] Based on the above, when external air enters, it first passes through the filter plate 33 to block large particles of impurities, and then passes through the air filter element 34 to filter fine dust, ensuring that the air entering the system is clean and unpolluted; the fan 37 operates to extract the hot and humid air generated by heating in the mechanism chamber 23, forming a negative pressure in the chamber, promoting the continuous entry of fresh filtered air, and at the same time reducing the temperature of the mechanism chamber 23. Furthermore, the plug-in connector 32 design facilitates quick replacement of the filter plate 33 and air filter element 34, making maintenance and operation convenient; the dual filtration structure effectively prevents impurities from entering the equipment, improves the insulation strength and stability of the dry air, reduces the impact of dust on insulation performance, and extends the service life of the engineering dry air mechanism; the fan 37 not only promotes air circulation and improves dehydration efficiency, but also helps to reduce the temperature of the mechanism chamber, avoiding high temperature affecting equipment operation.

[0031] Please see Figures 1 to 3 Multiple connection ports 13 are installed from top to bottom on the upper rear side of the right outer wall of the cabinet 1. A sealing cover 14 is provided on the outside of the connection port 13, and the sealing cover 14 is connected to the cabinet 1 by bolts.

[0032] Based on the above, the connection port 13 is used to realize the wiring connection between multiple cabinets 1 or the external wiring expansion to meet the capacity requirements of different power distribution scenarios; unused connection ports 13 are sealed by the sealing cover 14 to isolate external dust and moisture. Furthermore, the multiple connection ports 13 enhance the flexibility of equipment expansion, adapting to various needs from small-scale power distribution to large-scale networking; the bolt-fixed sealing cover 14 provides reliable sealing performance and is easy to disassemble, ensuring the insulation safety of unused interfaces without affecting subsequent expansion.

[0033] Please see Figures 1 to 5 Connecting blocks 17 are symmetrically installed on the left and right sides of the top of the cabinet 1 behind the water tank 7, and connecting block 25 is installed in the middle of the bottom of the cabinet 1. When multiple cabinets 1 are connected, they can be connected and fixed by connecting blocks 17 and connecting block 25.

[0034] Based on the above, when multiple cabinets 1 need to be combined for operation, the top connecting block 17 is aligned with the corresponding structure of the adjacent cabinet 1, and the bottom connecting block 25 is connected and fixed to the adjacent cabinet 1 to achieve a stable splicing of multiple cabinets 1. Furthermore, the symmetrical distribution of connecting blocks and the centered bottom design ensure the structural stability of the connected cabinets and prevent tilting caused by uneven stress. The connection method is simple and reliable, requiring no complicated splicing tools, improving installation efficiency and adapting to compact layouts in space-constrained scenarios.

[0035] Please see Figure 1 The bottom of the cabinet 1 is symmetrically equipped with slide rails 3 on both the front and back sides. The top of each slide rail 3 is slidably connected to a slider 2. The top of the slider 2 is fixedly connected to the bottom of the cabinet 1. When multiple cabinets 1 are connected, they can be docked by the slider 2 and the slide rail 3.

[0036] Based on the above, when multiple cabinets 1 are connected, the slider at the bottom of cabinet 1 is embedded into slide rail 3, and the slider at the bottom of another cabinet 1 is also embedded into slide rail 3, so that they form adjacent cabinets. The distance between cabinets 1 is adjusted by sliding and the cabinets are precisely aligned, providing a positioning basis for fixing the connecting blocks later. Furthermore, the cooperation between slide rail 3 and slider 2 enables the guiding and positioning of cabinet 1 during docking, greatly reducing the difficulty of alignment and improving the accuracy and efficiency of installation; the symmetrically distributed slide rail 3 and slider 2 ensure the stability during docking, avoid collision damage to cabinet 1, and enhance the effectiveness and integrity of multi-cabinet 1 combination.

[0037] Please see Figures 1 to 4 A temperature sensor 15 and a pressure sensor 16 are installed on the top of the cabinet 1 above the air box 22.

[0038] Based on the above, temperature sensor 15 monitors the overall temperature of air box 22 and cabinet 1 in real time. When the temperature exceeds the set threshold, the linkage cleaning and cooling system is activated. Air pressure sensor 16 monitors the air pressure inside air box 22 in real time. When the air pressure is lower than the set value, the air replenishment program of the engineering drying air mechanism is triggered. The temperature sensor 15 is: Akofa-FS-10, and the air pressure sensor 16 is: Wika-GDT-20. Furthermore, the sensors provide accurate and rapid monitoring, offering reliable data support for system linkage and enabling automatic triggering of cooling and gas replenishment functions without manual intervention. The sensors are installed on the top of cabinet 1, away from internal heat sources and moisture, resulting in higher measurement accuracy, longer service life, and ensuring real-time monitoring and early warning of abnormal equipment operation.

[0039] In summary, this compact, environmentally friendly, gas-insulated, fully enclosed ring main unit, during use, achieves independent operation and safe isolation of each functional module through its layered and compartmentalized compact structure. The bottom cable compartment 24 neatly lays cables, the middle gas box 22 provides the core space for insulation and arc extinguishing, the mechanism compartment 23 integrates power and processing equipment, and the relay compartment 21 achieves precise control. During normal operation, the arrayed fins 39 on the outside of the cabinet 1 achieve natural heat dissipation through heat exchange, and the engineering air drying mechanism is activated simultaneously: external air passes through the filter plate 33 of the plug-in block 32 and... After dual purification by the air filter element 34, it is preheated by the spiral heating wire 31 of the air inlet 30 and the heating tube 29 of the second pipe 28, and then dehydrated and dried by the small hot air circulation box 27. After being compressed by the compressor 35, it is stored in the air storage tank 36. When the air pressure sensor 16 detects that the air pressure in the air box 22 is insufficient, the air storage tank 36 replenishes the air box 22 through the third pipe 38 to ensure the insulation and arc extinguishing performance. The fan 37 draws out the hot and humid air in the mechanism chamber 23 to form a negative pressure, promoting the continuous entry of clean air into the mechanism chamber 23. When dust accumulates on the fins 39, it affects the air supply. When the heat dissipation or temperature sensor 15 detects that the temperature exceeds the set value, the cleaning and cooling system is activated in conjunction: Motor 20 drives the lead screw 10 to rotate through the meshing of helical gear 2 19 and helical gear 1 18, causing the bracket 5 to move up and down along slide rail 2 4. At the same time, motor 12 drives the roller brush 8 to rotate and clean the dust on the fins 39. Water tank 7 supplies water to pipe 1 9 through a hose, and the spray head at the bottom of pipe 1 9 wets the roller brush 8, achieving evaporative cooling while cleaning. If multiple cabinets 1 need to be expanded, this is accomplished through the cooperation of the bottom slider 2 and slide rail 1 3. Precise docking, and then fixed by top connecting block 17 and bottom connecting block 25, ensures the stability of the adjacent cabinet 1 combination structure; unused connection port 13 is sealed by sealing cover 14 to prevent impurities from entering; throughout the use, each system is monitored in real time and precisely linked through temperature sensor 15 and air pressure sensor 16, which not only replaces SF6 gas with dry air to meet environmental protection requirements, but also ensures stable heat dissipation through integrated cleaning and cooling design. The compact structure and flexible connection are suitable for various power distribution scenarios, achieving environmentally friendly, efficient and reliable operation.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact, environmentally friendly, gas-insulated, fully enclosed ring main unit, comprising a cabinet (1), characterized in that: The cabinet (1) is internally divided into multiple chambers. The bottom chamber is a cable chamber (24). Above the cable chamber (24) on the rear side is an air box (22). Above the cable chamber (24) on the front side is a mechanism chamber (23). The top of the mechanism chamber (23) is a relay chamber (21). The left, right, and rear outer walls of the cabinet (1) are equipped with arrayed fins (39) arranged from top to bottom. Cleaning mechanisms are provided on all three outer walls. The cleaning mechanisms can clean the dust on the surface of the fins (39) and moisten and cool the fins (39). The interior of the chamber (23) is equipped with an engineering air drying mechanism, which can dehydrate and dry the air and replenish the air into the air box (22). The cleaning mechanism includes a bracket (5), a pipe (9), and a roller brush (8). The bracket (5) is installed on the left and right rear outer walls of the cabinet (1). The lower end of the bracket (5) is rotatably connected to the roller brush (8). The pipe (9) is installed between the upper end of the bracket (5) and the roller brush (8). An array of spray heads is installed at the bottom of the pipe (9). The roller brush (8) can clean the fins (39) and moisten and cool them.

2. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 1, characterized in that: The engineering drying mechanism includes a small hot air circulation box (27), a second pipe (28), a heating pipe (29), an air inlet (30), and a heating wire (31). The small hot air circulation box (27) is installed at the bottom of the mechanism chamber (23). The second pipe (28) is installed on the right side of the small hot air circulation box (27). The air inlet (30) is installed at the end of the second pipe (28). The spiral heating wire (31) is installed inside the air inlet (30). The front side wall of the cabinet (1) has an opening at the mechanism chamber (23). The air inlet (30) is connected to the opening. The heating pipe (29) is sleeved on the outer surface of the second pipe (28).

3. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 2, characterized in that: The engineering drying mechanism also includes a compressor (35), an air tank (36), and a third pipe (38). The compressor (35) is located on the left side of the small heat circulation air box (27), and the air tank (36) is located on the rear side of the compressor (35). The third pipe (38) connects the small heat circulation air box (27), the compressor (35), and the air tank (36). The end of the third pipe (38) passes through the rear wall of the mechanism chamber (23) and extends into the air box (22). The air box (22) is slidably connected with a mounting bracket (26) in the front and back.

4. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 1, characterized in that: A slide rail 2 (4) is vertically installed at the corner of the outer wall of the cabinet (1). A bracket (5) is slidably connected between the slide rails 2 (4). A platform 1 (11) is installed at the end of the bracket (5). A motor 1 (12) is installed on the top of the platform 1 (11). The end of the roller brush (8) passes through the bracket (5) and is fixedly connected to the output shaft of the motor 1 (12). A water tank (7) is installed in the middle of the top of the cabinet (1). A flexible hose is connected between the pipe 1 (9) and the water tank (7).

5. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 4, characterized in that: The slide rail 2 (4) is rotatably connected to a lead screw (10). The top of the lead screw (10) passes through the top of the cabinet (1) and extends out. A helical gear 1 (18) is installed on the outer surface of the top of the lead screw (10). A motor 2 (20) is installed on one side of the helical gear 1 (18) on the top of the cabinet (1). A helical gear 2 (19) is installed on the output shaft of the motor 2 (20). The helical gear 2 (19) meshes with the helical gear 1 (18). A protective cover (6) is installed on the outer side of the helical gear 1 (18), the helical gear 2 (19), and the motor 2 (20) on the top of the cabinet (1). The lead screw (10) is threadedly connected to the bracket (5).

6. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 3, characterized in that: A plug-in block (32) is inserted into the opening on the front side wall of the cabinet (1). A filter plate (33) is installed in the middle of the inner surface of the plug-in block (32). An air filter element (34) is installed in the middle of one side wall of the filter plate (33). When the plug-in block (32) is inserted, the air filter element (34) can pass through the air inlet (30) and extend into the second pipe (28). A round hole is opened above the opening on the front side wall of the cabinet (1). A fan (37) is installed on the outer side wall of the round hole.

7. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 1, characterized in that: Multiple connection ports (13) are installed from top to bottom on the upper rear side of the right outer wall of the cabinet (1). A sealing cover (14) is provided on the outside of the connection port (13). The sealing cover (14) is connected to the cabinet (1) by bolts.

8. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 1, characterized in that: The top left and right sides of the cabinet (1) are symmetrically equipped with connecting block one (17) on the rear side of the water tank (7), and the bottom middle of the cabinet (1) is equipped with connecting block two (25). When the multiple cabinets (1) are connected, they can be connected and fixed by connecting block one (17) and connecting block two (25).

9. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 8, characterized in that: The cabinet (1) has symmetrical slide rails (3) on the front and back sides of the bottom. The top of each slide rail (3) is slidably connected to a slider (2). The top of the slider (2) is fixedly connected to the bottom of the cabinet (1). When multiple cabinets (1) are connected, they can be docked by the slider (2) and the slide rail (3).

10. The compact, environmentally friendly, gas-insulated, fully enclosed ring main unit according to claim 1, characterized in that: A temperature sensor (15) and a pressure sensor (16) are installed on the top of the cabinet (1) above the air box (22).

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