A primary and secondary fusion column circuit breaker with a protective isolating switch

Abstract

The application discloses a primary and secondary fusion column circuit breaker with a protective isolating switch, relates to the technical field of circuit breakers, and comprises a circuit breaker base, an upper insulating cylinder and a support insulator are fixed to the upper end of the circuit breaker base, a current transformer is fixed to the side of the upper insulating cylinder, an opening and closing handle, an energy storage handle and an opening and closing indicating needle are installed on the side of the circuit breaker base, a mounting support is fixed to the lower end of the circuit breaker base, and a cooling structure for cooling the circuit breaker base is arranged at the upper end of the mounting support. The cooling structure can improve the heat dissipation effect of the circuit breaker base by strengthening the heat exchange characteristics of the low-temperature moisture-containing air flow and combining with the design of the wrapped series air duct, effectively solves the problem of insufficient heat dissipation of the column circuit breaker in an outdoor high-temperature environment, the whole cooling structure is automatically started and stopped and the state is monitored by relying on an intelligent measurement and control system, the stable operation of the circuit breaker in the high-temperature environment is ensured, and the demand for intelligent distribution network remote management and control and operation and maintenance is met.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch. Background Technology

[0002] Integrated primary and secondary pole-mounted circuit breakers are commonly used outdoor power distribution equipment in the power distribution network field. They integrate the primary switching operation structure with the secondary measurement and control protection module into one unit, exhibiting a high degree of integration. They also feature fault protection, remote control, and data acquisition functions, making them suitable for outdoor pole and tower installation scenarios and widely used in urban and rural power distribution lines. This type of equipment enables real-time perception and information uploading of power distribution line status, deeply adapting to the needs of smart grid construction and development. It is a core foundational equipment for building a smart distribution network system and realizing intelligent power grid dispatch and control.

[0003] Conventional outdoor pole-mounted circuit breakers are generally equipped with protective disconnect switches. These disconnect switches are linked to the circuit breaker body, creating an effective electrical isolation point during equipment maintenance and line outages. This ensures the safety of on-site maintenance operations and, in conjunction with distribution protection logic, isolates line faults, effectively improving the operational protection capabilities and safety of distribution lines. Furthermore, this linked protection structure is compatible with smart grid safety operation and maintenance management standards, meeting the requirements for coordinated operation of local and remote control in smart distribution networks.

[0004] The heat dissipation methods of existing primary and secondary integrated pole-mounted circuit breakers are relatively simple, mostly relying on the natural heat dissipation of the base body, or only adding simple heat dissipation fins to the outside of the base for auxiliary heat dissipation. After entering the hot summer, the equipment itself generates a lot of heat, and coupled with the high outdoor temperature, the accumulated heat is difficult to dissipate quickly. The equipment operates under high temperature conditions for a long time, and the heat dissipation effect is insufficient. This can easily cause the internal components to age faster and their performance to decline. In severe cases, it can affect the stability of the equipment's opening and closing actions and the normal functioning of the line protection function, which is not conducive to the long-term stable operation of the equipment. Summary of the Invention

[0005] The purpose of this application is to address the problem that existing primary and secondary integrated pole-mounted circuit breakers, as mentioned in the background art, have a single heat dissipation method, and when the equipment body generates heat during operation and the outdoor ambient temperature is high, the heat is difficult to dissipate quickly, resulting in long-term exposure to high temperatures and affecting the stable operation of the equipment. This application provides a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution: A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch includes a circuit breaker base. An upper insulating cylinder and a support insulator are fixed to the upper end of the circuit breaker base. A current transformer is fixed to the side of the upper insulating cylinder. A closing / opening handle, an energy storage handle, and a closing / opening indicator are installed on the side of the circuit breaker base. A mounting bracket is fixed to the lower end of the circuit breaker base. A cooling structure for cooling the circuit breaker base is provided on the upper end of the mounting bracket. The cooling structure includes a heat-conducting layer fixed to the outer surface of the circuit breaker base. Heat dissipation fins are fixed to the side of the heat-conducting layer away from the circuit breaker base. The circumferential edge of the heat dissipation fins is fixedly connected to the circuit breaker base. A cover plate is fixed to the side of the heat dissipation fins away from the heat-conducting layer. Multiple heat dissipation ducts are provided between the heat dissipation fins and the cover plate. The heat-conducting layer, heat dissipation fins, and cover plate are all U-shaped. An air supply assembly and a cooling assembly are provided between the cover plate and the mounting bracket.

[0007] By adopting the above technical solution, when the circuit breaker is in use, the air supply component and the cooling component deliver cooled and accelerated air into the heat dissipation channel. The heat generated by the operation of the circuit breaker base is conducted to the heat dissipation fins through the heat conduction layer. The flowing cold air quickly carries away the heat on the heat dissipation fins in the heat dissipation channel, which can achieve active cooling of the entire circuit breaker base. Compared with natural heat dissipation, the cooling efficiency is higher, which can effectively control the operating temperature of the equipment, reduce the wear and tear on internal components caused by high temperature, and ensure the long-term stable operation of the equipment.

[0008] Furthermore, the air supply assembly includes a mounting housing mounted on the upper end of the mounting bracket. An air inlet pipe and a horn-shaped air outlet pipe are fixed on the outer surface of the mounting housing. The air outlet pipe is fixedly connected to the cover plate and extends into the interior of the cover plate, communicating with multiple heat dissipation air ducts. A drive motor is mounted on the side of the mounting housing. A drive shaft is fixed to the output end of the drive motor. The end of the drive shaft away from the drive motor extends into the mounting housing and is rotatably connected to the mounting housing. An impeller is fixed to the end of the drive shaft extending into the mounting housing.

[0009] By adopting the above technical solution, the air supply component is used to deliver a stable airflow to the heat dissipation duct, and the cold air processed by the cooling component is sent into the interior of each heat dissipation duct through the air outlet pipe, so as to provide a continuous flow of cold air to the heat dissipation duct and ensure the stability of cooling and heat dissipation.

[0010] Furthermore, the cooling component includes a water storage tank fixed to the upper end of the mounting bracket, a top plate fixed to the upper end of the water storage tank, four positioning strips arranged symmetrically in pairs fixed inside the water storage tank, an installation frame inserted between the positioning strips, a cooling plate fixed inside the installation frame, an air inlet pipe extending into the water storage tank and fitting against the cooling plate, an air inlet opening on the side of the water storage tank away from the air inlet pipe, and a baffle installed inside the water storage tank.

[0011] By adopting the above technical solution, the cooling component is used to cool the overall air entering the water storage tank, resulting in a lower air temperature supplied to the heat dissipation duct, thereby improving the heat dissipation and cooling effect. Furthermore, the turbulence-inducing component includes a mounting shaft rotatably connected inside the water storage tank, the mounting shaft passing through the water storage tank, and a turbulence-inducing auger fixed on the mounting shaft.

[0012] By adopting the above technical solution, the turbulence component is used to stir the water in the water tank, so that the overall temperature of the cooling water remains uniform, ensuring that the cooling plate continuously and stably cools the air entering the air inlet pipe, and improving the stability of the overall cooling effect.

[0013] Furthermore, a first synchronous pulley is fixed on the drive shaft, and a second synchronous pulley is fixed at one end of the mounting shaft extending out of the water storage tank. The first synchronous pulley and the second synchronous pulley are connected by a first synchronous belt drive, and a first protective shell is fixed on one side of the water storage tank.

[0014] By adopting the above technical solution, the first synchronous pulley, the second synchronous pulley, and the first synchronous belt play a transmission role, so that when the drive shaft rotates, it can synchronously drive the mounting shaft to rotate.

[0015] Furthermore, a water level sensor is fixed inside the water storage tank, and a temperature sensor is fixed inside the circuit breaker base.

[0016] By adopting the above technical solutions, the water level sensor is used to monitor the cooling water level inside the water storage tank in real time. When the water level is lower than the set safety value, it can send an alert in time, so that maintenance personnel can replenish water in time and ensure the normal operation of the cooling function. The temperature sensor can collect the working temperature inside the circuit breaker base in real time and can automatically control the start and stop of the drive motor according to the actual temperature, without the need for manual operation, thus realizing intelligent temperature control.

[0017] Furthermore, a heat insulation layer is fixed to the outer surface of the water storage tank, and a high-reflectivity nano-coating is provided on the outer surface of the heat insulation layer.

[0018] By adopting the above technical solution, the heat insulation layer combined with the high reflectivity nano-coating can reduce the transfer of heat from the external environment into the water storage tank through the tank body, thereby reducing the rate at which the water temperature rises under high temperature and sunlight conditions.

[0019] Furthermore, a guide pipe is fixed to the upper end of the top plate, the upper end of the guide pipe is inclined, a guide groove is opened at the upper end of the top plate corresponding to the guide pipe, a barrier net is fixed inside the guide pipe, and an overflow pipe is fixed to the side of the water storage tank.

[0020] By adopting the above technical solution, the diversion pipe is used to guide rainwater into the water storage tank, which can automatically replenish water during rainy days and reduce the number of times manual water replenishment is required.

[0021] Furthermore, a rotating shaft is rotatably connected inside the water storage tank. One end of the rotating shaft is fixed with a vibrating cam, and the other end extends out of the water storage tank.

[0022] By adopting the above technical solution, the rotating shaft drives the vibrating cam to vibrate the barrier net, shaking off the accumulated fallen leaves, mosquito corpses and other impurities on the barrier net, preventing impurities from clogging the barrier net, ensuring that rainwater can flow smoothly into the water storage tank through the diversion pipe, and ensuring the normal operation of the automatic water replenishment function.

[0023] Furthermore, a third synchronous pulley is fixed to both the end of the mounting shaft away from the second synchronous pulley and the end of the rotating shaft extending out of the water storage tank. The two third synchronous pulleys are connected by a second synchronous belt drive. A second protective shell is fixed to the side of the water storage tank away from the first protective shell.

[0024] By adopting the above technical solution, the third synchronous pulley and the second synchronous belt play a transmission role, so that when the mounting shaft rotates, it can drive the rotating shaft to rotate synchronously.

[0025] In summary, this application includes at least one of the following beneficial effects; 1. In this application, when the circuit breaker requires heat dissipation during use, the drive motor drives the impeller to rotate at high speed inside the mounting housing, creating a negative pressure inside the housing. This forces outside air into the water storage tank, where it passes through a cooling plate and exchanges heat with the moisture on the plate, effectively lowering the air temperature. The low-temperature, humid airflow, pre-cooled by evaporation from the cooling plate, enters the mounting housing through the inlet duct, then through a horn-shaped tube into a series-connected heat dissipation channel that surrounds the circuit breaker base on three sides. The airflow flows along the path within the heat dissipation channel, making full contact with the heat dissipation fins that are conducted through the heat-conducting layer. Through forced convection heat transfer, the heat conducted from the circuit breaker base to the fins is efficiently removed, and finally discharged from the end of the heat dissipation channel. This cooling structure enhances heat exchange characteristics through low-temperature, humid airflow, combined with the enclosed series air duct design, improving the heat dissipation effect on the circuit breaker base and effectively solving the problem of insufficient heat dissipation for pole-mounted circuit breakers in high-temperature outdoor environments.

[0026] 2. In this application, when the drive shaft drives the impeller to rotate and dissipate heat from the circuit breaker base, the first synchronous pulley, the first synchronous belt, and the second synchronous pulley cause the mounting shaft to drive the turbulence auger to rotate synchronously, thereby agitating the water in the water tank. By agitating the water, the water temperature stratification phenomenon in the tank can be completely eliminated, making the water temperature uniform and ensuring that the cooling plate can maintain the maximum evaporative heat exchange temperature difference, significantly improving the air intake pre-cooling efficiency.

[0027] 3. In this application, the installation shaft drives the turbulence auger to rotate, which will cause the water flow to continuously flush the contact interface between the humidifying plate and the water body, reduce the blockage of impurities in the capillary water absorption pores at the bottom of the humidifying plate, ensure uniform wetting of the entire surface of the humidifying plate, and further enhance the overall heat dissipation effect of the circuit breaker base.

[0028] 4. In this application, during rainy weather, rainwater flows smoothly into the water source through the inclined section at the top of the guide pipe. After being initially filtered by the barrier mesh inside the guide pipe to remove debris such as leaves and dust, it flows naturally into the water storage tank along the guide channel, completing the automatic water replenishment. When the water level in the storage tank rises to the preset maximum water level, the excess water will be automatically discharged through the overflow pipe located at the corresponding height on the side wall of the storage tank. By automatically collecting and replenishing rainwater, the frequency of manual water replenishment for outdoor pole-mounted equipment can be significantly reduced, greatly improving the convenience of operation and maintenance of unattended equipment in remote areas.

[0029] 5. In this application, when the installation shaft drives the turbulence auger to agitate the water, the third synchronous pulley and the second synchronous belt cause the rotating shaft to drive the vibrating cam to rotate periodically. During the rotation of the vibrating cam, it will periodically strike the back of the barrier net, performing continuous and uniform vibration on the barrier net, effectively shaking off the debris attached to the surface of the barrier net. This can effectively reduce the blockage of the barrier net due to the accumulation of debris, ensure the long-term unobstructed flow of rainwater collection channels, extend the cleaning and maintenance cycle of the barrier net, and further improve the long-term operational stability of the entire evaporative cooling and heat dissipation system in outdoor unattended scenarios.

[0030] 6. In this application, throughout the entire cooling structure, a temperature sensor collects the operating temperature of the core area inside the circuit breaker base in real time, providing accurate threshold data for the automatic start-stop control of the drive motor and ensuring that the equipment always operates within a safe and reliable temperature range. A water level sensor monitors the remaining water level in the water tank in real time, triggering a low water level warning signal promptly to ensure a continuous and stable water supply to the evaporative cooling pads and prevent heat dissipation failure due to water shortage. The operating data collected by both types of sensors is transmitted in real time to the circuit breaker's built-in secondary measurement and control terminal and simultaneously uploaded to a remote operation and maintenance management platform via the smart grid distribution communication network. This enables adaptive intelligent control of the cooling system and allows maintenance personnel to remotely view the equipment's operating status, issue control commands, and handle abnormal situations. This effectively improves the unmanned operation and maintenance level of outdoor pole-mounted circuit breakers and provides solid data support and equipment assurance for the safe and stable operation and intelligent dispatch and control of the smart distribution network. Attached Figure Description

[0031] Figure 1 This is a first three-dimensional structural schematic diagram of the pole-mounted circuit breaker in this application; Figure 2 This is a second three-dimensional structural schematic diagram of the pole-mounted circuit breaker in this application; Figure 3 This is a schematic diagram of the first interaction between the column-mounted circuit breaker and the cooling structure in this application; Figure 4 This is a schematic diagram of the first interaction between the column-mounted circuit breaker and the cooling structure in this application; Figure 5 This is a partial schematic diagram of the cooling structure in this application; Figure 6 This is an overall schematic diagram of the cooling structure in this application; Figure 7 This is a partial schematic diagram of the air-cooled component and the cooling component in this application; Figure 8 This application Figure 5 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the transmission in this application.

[0032] Explanation of reference numerals in the attached figures: 1. Circuit breaker base; 11. Upper insulating cylinder; 12. Support insulator; 13. Current transformer; 14. Opening / closing handle; 15. Energy storage handle; 16. Opening / closing indicator needle; 17. Mounting bracket; 2. Heat-conducting layer; 21. Heat dissipation fins; 22. Cover plate; 24. Mounting housing; 241. Air inlet duct; 242. Air outlet duct; 243. Drive motor; 244. Drive shaft; 245. Impeller; 3. Water storage tank; 31. Top plate; 32. Positioning strip; 33. Mounting frame 34. Frame; 35. Cooling plate; 36. Air inlet; 37. First protective shell; 38. Mounting shaft; 39. Turbulence auger; 30. First synchronous pulley; 31. Second synchronous pulley; 32. First synchronous belt; 33. Water level sensor; 44. Heat insulation layer; 55. Guide pipe; 66. Guide groove; 77. Barrier mesh; 88. Rotating shaft; 99. Vibrating cam; 100. Third synchronous pulley; 11. Second synchronous belt; 22. Second protective shell; 33. Overflow pipe. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0034] This application discloses a primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch.

[0035] Reference Figure 1 and Figure 2A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch includes a circuit breaker base 1. An upper insulating cylinder 11 and a support insulator 12 are fixed to the upper end of the circuit breaker base 1. A current transformer 13 is fixed to the side of the upper insulating cylinder 11. A switching handle 14, an energy storage handle 15, and a switching indicator needle 16 are installed on the side of the circuit breaker base 1. A mounting bracket 17 is fixed to the lower end of the circuit breaker base 1. A cooling structure for cooling the circuit breaker base 1 is provided on the upper end of the mounting bracket 17.

[0036] The circuit breaker's base 1 integrates the primary switch assembly and secondary measurement and control protection module, serving as the core support base. The upper insulating cylinder 11 and the support insulator 12 work together to provide insulation support and external insulation protection for the primary conductive circuit. The current transformer 13 collects the line's operating current in real time, providing current data support for the secondary measurement and control module. The opening and closing handle 14, energy storage handle 15, and opening / closing indicator 16 are used to perform the circuit breaker's opening and closing operations and indicate its operating status, facilitating on-site management and operation by maintenance personnel. The mounting bracket 17 secures the entire circuit breaker to the outdoor column mounting bracket 17, completing the equipment's installation and fixation. During operation, the cooling structure rapidly dissipates the heat generated by the circuit breaker base 1, preventing heat accumulation inside the base 1 for extended periods and improving the equipment's heat dissipation effect.

[0037] Reference Figures 3-9 The cooling structure includes a heat-conducting layer 2 fixed to the outer surface of the circuit breaker base 1. The heat-conducting layer 2 is a thermally conductive silicone grease layer with good thermal conductivity. A heat dissipation fin 21 is fixed on the side of the heat-conducting layer 2 away from the circuit breaker base 1. The circumferential edge of the heat dissipation fin 21 is fixedly connected to the circuit breaker base 1. A cover plate 22 is fixed on the side of the heat dissipation fin 21 away from the heat-conducting layer 2. Multiple heat dissipation air ducts are provided between the heat dissipation fin 21 and the cover plate 22. The heat-conducting layer 2, the heat dissipation fin 21, and the cover plate 22 are all U-shaped. An air supply component and a cooling component are provided between the cover plate 22 and the mounting bracket 17.

[0038] The air supply assembly includes a mounting housing 24 mounted on the upper end of the mounting bracket 17. An air inlet pipe 241 and a horn-shaped air outlet pipe 242 are fixed on the outer surface of the mounting housing 24. The air outlet pipe 242 is fixedly connected to the cover plate 22 and extends into the interior of the cover plate 22, communicating with multiple heat dissipation air ducts. A drive motor 243 is mounted on the side of the mounting housing 24. A drive shaft 244 is fixed at the output end of the drive motor 243. The end of the drive shaft 244 away from the drive motor 243 extends into the mounting housing 24 and is rotatably connected to the mounting housing 24. An impeller 245 is fixed at the end of the drive shaft 244 that extends into the mounting housing 24.

[0039] Additionally, the cooling assembly includes a water tank 3 fixed to the upper end of the mounting bracket 17. A drain valve is fixed to the bottom of the water tank 3 for periodic drainage. A top plate 31 is fixed to the upper end of the water tank 3, and the water tank 3 and the top plate 31 are connected by bolts. Four symmetrically arranged positioning strips 32 are fixed inside the water tank 3, and a mounting frame 33 is inserted between the positioning strips 32. A cooling plate 34, which is a modified cellulose wet curtain, is fixed inside the mounting frame 33. An air inlet pipe 241 extends into the water tank 3 and is in contact with the cooling plate 34. The side of the cooling plate 34 that is in contact with the air inlet pipe 241 is embedded with… A rubber sealing ring is fixed inside the air inlet pipe 241, and the rubber sealing ring is tightly fitted to the end of the air inlet pipe 241. The rubber sealing ring ensures that the airflow entering the air inlet pipe 241 is cooled by the cooling plate 34, preventing the airflow from entering through the gap between the air inlet pipe 241 and the cooling plate 34. An air inlet 35 is opened on the side of the water storage tank 3 away from the air inlet pipe 241. A dustproof net is fixed inside the air inlet 35. The dustproof net can reduce the entry of external dust and debris into the water storage tank 3. A baffle is installed inside the water storage tank 3. A water level sensor 38 is fixed inside the water storage tank 3. A temperature sensor is fixed inside the circuit breaker base 1.

[0040] Furthermore, the turbulence-inducing component includes a mounting shaft 37 rotatably connected inside the water storage tank 3, the mounting shaft 37 passing through the water storage tank 3, and a turbulence-inducing auger 371 fixed on the mounting shaft 37.

[0041] Furthermore, a first synchronous pulley 372 is fixed on the drive shaft 244, and a second synchronous pulley 373 is fixed to one end of the mounting shaft 37 extending out of the water tank 3. The first synchronous pulley 372 and the second synchronous pulley 373 are connected by a first synchronous belt 374. A first protective housing 36 is fixed to one side of the water tank 3. The drive motor 243 is fixedly connected to the side of the first protective housing 36, and the drive shaft 244 is rotatably connected to the first protective housing 36. The first protective housing 36 is used to support the drive motor 243 and to protect the first synchronous pulley 372, the second synchronous pulley 373, and the first synchronous belt 374.

[0042] During the operation of the circuit breaker, when the temperature sensor detects that the internal temperature of the circuit breaker base 1 reaches the threshold of 55°C, the temperature sensor sends a signal and transmits it to the secondary measurement and control terminal of the circuit breaker, and the terminal then starts the drive motor 243. The drive motor 243 drives the drive shaft 244 to rotate, which in turn drives the impeller 245 to rotate at high speed inside the mounting housing 24. This creates a negative pressure inside the mounting housing 24. External air enters the water storage tank 3 after being filtered by the dustproof screen of the air inlet 35 on the side of the water storage tank 3. The air entering the water storage tank 3 passes through the cooling plate 34. When passing through the cooling plate 34, it exchanges heat with the moisture on the cooling plate 34, which effectively reduces the air temperature. The low-temperature humid airflow, which has been pre-cooled by evaporation through the cooling plate 34, enters the mounting housing 24 through the air inlet pipe 241, and then enters the series heat dissipation channel that surrounds the circuit breaker base 1 on three sides through the horn tube. The airflow flows along the path in the heat dissipation channel and comes into full contact with the heat dissipation fins 21 that are conducted by the heat conduction layer 2. The heat is efficiently carried away by the forced convection heat exchange, which carries away the heat conducted from the circuit breaker base 1 to the fins, and finally discharged from the end of the heat dissipation channel. This cooling structure enhances heat exchange characteristics through low-temperature, humid airflow. Combined with a wrap-around series air duct design, it improves the heat dissipation effect on the circuit breaker base 1, effectively solving the problem of insufficient heat dissipation of pole-mounted circuit breakers in outdoor high-temperature environments.

[0043] When the drive shaft 244 drives the impeller 245 to rotate, the first synchronous wheel 372 at the end of the drive shaft 244 rotates accordingly. Then, under the action of the first synchronous belt 374 and the second synchronous wheel 373, the mounting shaft 37 rotates. At this time, the turbulence auger 371 on the mounting shaft 37 rotates synchronously, thereby agitating the water in the water storage tank 3. By agitating the water, the water temperature stratification phenomenon in the tank can be completely eliminated, making the water temperature uniform and ensuring that the cooling plate 34 can maintain the maximum evaporative heat exchange temperature difference, significantly improving the air intake pre-cooling efficiency; and continuously flushing the contact interface between the humidifying plate and the water, reducing impurities from clogging the capillary water absorption pores at the bottom of the humidifying plate, ensuring uniform wetting of the entire surface of the humidifying plate, and further enhancing the overall heat dissipation effect of the circuit breaker base 1.

[0044] Reference Figure 5 and Figure 8 The outer surface of the water storage tank 3 is fixed with a heat insulation layer 39. The heat insulation layer is an aerogel heat insulation felt, which has good heat insulation properties. Combined with the reflective coating, it effectively reduces the rise in water temperature inside the water storage tank 3 caused by sunlight. The outer surface of the heat insulation layer 39 is provided with a high reflectivity nano coating.

[0045] The aerogel insulation pad is wrapped around the outside of the water tank 3. It can use its extremely low thermal conductivity to block the transfer of heat from the external environment to the inside of the water tank 3, reducing the impact of high outdoor temperatures on the water temperature inside the water tank 3. Combined with the high reflectivity nano-coating to reflect solar radiation heat, it further inhibits the rise of water temperature in the water tank 3, ensuring that the water temperature is maintained at a low temperature. This ensures that the cooling and heat exchange effect of the cooling plate 34 can be stably performed, preventing the external environment heat from raising the temperature of the pre-cooled air and ensuring the stability of overall cooling and heat dissipation.

[0046] Reference Figures 6-9 A guide pipe 4 is fixed to the upper end of the top plate 31. The guide pipe 4 is used to guide rainwater into the water storage tank 3 to reduce the frequency of water filling. The upper end of the guide pipe 4 is inclined. A guide groove 41 is opened at the upper end of the top plate 31 corresponding to the guide pipe 4. A barrier net 42 is fixed inside the guide pipe 4. The barrier net 42 is a stainless steel wire mesh used to prevent external debris from falling into the water storage tank 3. An overflow pipe is fixed to the side of the water storage tank 3. The overflow pipe is located at the highest liquid level of the water storage tank 3. During rainy weather, when the water inside the water storage tank 3 is higher than the highest liquid level, it will flow out from the overflow pipe.

[0047] The water storage tank 3 is rotatably connected to a rotating shaft 43. One end of the rotating shaft 43 is fixed with a vibrating cam 431, and the other end extends out of the water storage tank 3.

[0048] In addition, a third synchronous pulley 432 is fixed to both the end of the mounting shaft 37 away from the second synchronous pulley 373 and the end of the rotating shaft 43 extending out of the water tank 3. The two third synchronous pulleys 432 are connected by a second synchronous belt 433. A second protective housing 434 is fixed to the side of the water tank 3 away from the first protective housing 36. The second protective housing 434 is used to protect the third synchronous pulley 432 and the second synchronous belt 433.

[0049] During rainy weather, rainwater flows smoothly into the inclined section at the upper end of the guide pipe 4. After being initially filtered by the barrier net 42 inside the guide pipe 4 (filtering out debris such as leaves and dust), it flows naturally into the water storage tank 3 along the guide channel 41, completing the automatic water replenishment. When the water level in the water storage tank 3 rises to the preset maximum water level, the excess water will be automatically discharged through the overflow pipe located at the corresponding height on the side wall of the water storage tank 3. By automatically collecting and replenishing rainwater, the frequency of manual water replenishment for outdoor pole-mounted equipment can be significantly reduced, greatly improving the convenience of operation and maintenance of unattended equipment in remote areas.

[0050] Furthermore, when the mounting shaft 37 drives the turbulence auger 371 to rotate, the third synchronous wheel 432 at the end of the mounting shaft 37 will rotate accordingly. Through the transmission action of the second synchronous belt 433, it will drive the third synchronous wheel 432 at the end of the rotating shaft 43 to rotate, thereby causing the rotating shaft 43 to drive the vibrating cam 431 to rotate periodically. During the rotation of the vibrating cam 431, it will periodically strike the back of the barrier net 42, performing continuous and uniform vibration on the barrier net 42, effectively shaking off the debris attached to the surface of the barrier net 42. This can effectively reduce the blockage of the barrier net 42 due to the accumulation of debris, ensure the long-term unobstructed flow of rainwater collection channels, and extend the cleaning and maintenance cycle of the barrier net 42, further improving the long-term operational stability of the entire evaporative cooling and heat dissipation system in outdoor unattended scenarios.

[0051] Working principle: During the operation of this circuit breaker, when the temperature sensor detects that the internal temperature of the circuit breaker base 1 reaches the threshold of 55°C, the temperature sensor sends a signal and transmits it to the secondary measurement and control terminal of the circuit breaker, and the terminal then starts the drive motor 243. The drive motor 243 drives the drive shaft 244 to rotate, which in turn drives the impeller 245 to rotate at high speed inside the mounting housing 24. This creates a negative pressure inside the mounting housing 24. External air enters the water storage tank 3 after being filtered by the dustproof screen of the air inlet 35 on the side of the water storage tank 3. The air entering the water storage tank 3 passes through the cooling plate 34. When passing through the cooling plate 34, it exchanges heat with the moisture on the cooling plate 34, which effectively reduces the air temperature. The low-temperature humid airflow, which has been pre-cooled by evaporation through the cooling plate 34, enters the mounting housing 24 through the air inlet pipe 241, and then enters the series heat dissipation channel that surrounds the circuit breaker base 1 on three sides through the horn tube. The airflow flows along the path in the heat dissipation channel and comes into full contact with the heat dissipation fins 21 that are conducted by the heat conduction layer 2. The heat is efficiently carried away by the forced convection heat exchange, which carries away the heat conducted from the circuit breaker base 1 to the fins, and finally discharged from the end of the heat dissipation channel. This cooling structure enhances heat exchange characteristics through low-temperature, humid airflow. Combined with a wrap-around series air duct design, it improves the heat dissipation effect on the circuit breaker base 1, effectively solving the problem of insufficient heat dissipation of pole-mounted circuit breakers in outdoor high-temperature environments.

[0052] When the drive shaft 244 drives the impeller 245 to rotate, the first synchronous wheel 372 at the end of the drive shaft 244 rotates accordingly. Then, under the action of the first synchronous belt 374 and the second synchronous wheel 373, the mounting shaft 37 rotates. At this time, the turbulence auger 371 on the mounting shaft 37 rotates synchronously, thereby agitating the water in the water storage tank 3. By agitating the water, the water temperature stratification phenomenon in the tank can be completely eliminated, making the water temperature uniform and ensuring that the cooling plate 34 can maintain the maximum evaporative heat exchange temperature difference, significantly improving the air intake pre-cooling efficiency; and continuously flushing the contact interface between the humidifying plate and the water, reducing impurities from clogging the capillary water absorption pores at the bottom of the humidifying plate, ensuring uniform wetting of the entire surface of the humidifying plate, and further enhancing the overall heat dissipation effect of the circuit breaker base 1.

[0053] During rainy weather, rainwater flows smoothly into the inclined section at the upper end of the guide pipe 4. After being initially filtered by the barrier net 42 inside the guide pipe 4 (filtering out debris such as leaves and dust), it flows naturally into the water storage tank 3 along the guide channel 41, completing the automatic water replenishment. When the water level in the water storage tank 3 rises to the preset maximum water level, the excess water will be automatically discharged through the overflow pipe located at the corresponding height on the side wall of the water storage tank 3. By automatically collecting and replenishing rainwater, the frequency of manual water replenishment for outdoor pole-mounted equipment can be significantly reduced, greatly improving the convenience of operation and maintenance of unattended equipment in remote areas.

[0054] Furthermore, when the mounting shaft 37 drives the turbulence auger 371 and the drive motor 243 to rotate synchronously, the third synchronous wheel 432 at the end of the mounting shaft 37 will rotate accordingly. Through the transmission action of the second synchronous belt 433, it will drive the third synchronous wheel 432 at the end of the rotating shaft 43 to rotate, thereby causing the rotating shaft 43 to drive the vibrating cam 431 to rotate periodically. During the rotation of the vibrating cam 431, it will periodically strike the back of the barrier net 42, performing continuous and uniform vibration on the barrier net 42, effectively shaking off the debris attached to the surface of the barrier net 42. This can effectively reduce the blockage of the barrier net 42 due to the accumulation of debris, ensure the long-term unobstructed flow of rainwater collection channels, and extend the cleaning and maintenance cycle of the barrier net 42, further improving the long-term operational stability of the entire evaporative cooling heat dissipation system in outdoor unattended scenarios.

[0055] The water level sensor 38 inside the water storage tank 3 monitors the water level in real time. If the water level is lower than the set value, it will send a water shortage signal to the secondary monitoring and control terminal. The terminal will then upload the warning information to the remote operation and maintenance backend to remind staff to replenish the water in time.

[0056] The entire cooling structure relies on an intelligent monitoring and control system to achieve automatic start-up, shutdown, and status monitoring, which not only ensures the stable operation of the circuit breaker in high-temperature environments but also meets the needs of remote management and maintenance of intelligent distribution networks.

Claims

1. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch, comprising a circuit breaker base (1), characterized in that: The upper end of the circuit breaker base (1) is fixed with an upper insulating cylinder (11) and a support insulator (12). A current transformer (13) is fixed on the side of the upper insulating cylinder (11). The side of the circuit breaker base (1) is equipped with a switching handle (14), an energy storage handle (15), and a switching indicator needle (16). The lower end of the circuit breaker base (1) is fixed with a mounting bracket (17). The upper end of the mounting bracket (17) is provided with a cooling structure for cooling the circuit breaker base (1). The cooling structure includes a heat-conducting layer fixed on the outer surface of the circuit breaker base (1). (2) A heat dissipation fin (21) is fixed on the side of the heat-conducting layer (2) away from the circuit breaker base (1). The circumferential edge of the heat dissipation fin (21) is fixedly connected to the circuit breaker base (1). A cover plate (22) is fixed on the side of the heat dissipation fin (21) away from the heat-conducting layer (2). Multiple heat dissipation air ducts are provided between the heat dissipation fin (21) and the cover plate (22). The heat-conducting layer (2), the heat dissipation fin (21), and the cover plate (22) are all in the shape of "U". An air supply component and a cooling component are provided between the cover plate (22) and the mounting bracket (17).

2. The primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 1, characterized in that: The air supply assembly includes a mounting housing (24) mounted on the upper end of the mounting bracket (17). An air inlet pipe (241) and a horn-shaped air outlet pipe (242) are fixed on the outer surface of the mounting housing (24). The air outlet pipe (242) is fixedly connected to the cover plate (22) and extends into the cover plate (22) and is connected to multiple heat dissipation air ducts. A drive motor (243) is mounted on the side of the mounting housing (24). A drive shaft (244) is fixed at the output end of the drive motor (243). One end of the drive shaft (244) away from the drive motor (243) extends into the mounting housing (24) and is rotatably connected to the mounting housing (24). An impeller (245) is fixed at one end of the drive shaft (244) extending into the mounting housing (24).

3. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 2, characterized in that: The cooling component includes a water tank (3) fixed on the upper end of the mounting bracket (17). A top plate (31) is fixed on the upper end of the water tank (3). Four positioning strips (32) are fixed inside the water tank (3) and arranged symmetrically in pairs. An installation frame (33) is inserted between the positioning strips (32). A cooling plate (34) is fixed inside the installation frame (33). An air inlet pipe (241) extends into the water tank (3) and is in contact with the cooling plate (34). An air inlet (35) is opened on the side of the water tank (3) away from the air inlet pipe (241). A baffle is provided inside the water tank (3).

4. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 3, characterized in that: The turbulence-inducing component includes an installation shaft (37) rotatably connected inside the water storage tank (3), the installation shaft (37) passing through the water storage tank (3), and a turbulence-inducing auger (371) fixed on the installation shaft (37).

5. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 4, characterized in that: A first synchronous pulley (372) is fixed on the drive shaft (244), and a second synchronous pulley (373) is fixed at one end of the mounting shaft (37) extending out of the water tank (3). The first synchronous pulley (372) and the second synchronous pulley (373) are connected by a first synchronous belt (374). A first protective shell (36) is fixed on one side of the water tank (3).

6. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 3, characterized in that: A water level sensor (38) is fixed inside the water storage tank (3), and a temperature sensor is fixed inside the circuit breaker base (1).

7. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 3, characterized in that: The outer surface of the water storage tank (3) is fixed with a heat insulation layer (39), and the outer surface of the heat insulation layer (39) is provided with a high reflectivity nano coating.

8. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 3, characterized in that: The top plate (31) is fixed with a guide pipe (4), the upper end of the guide pipe (4) is an inclined section, the top plate (31) is provided with a guide groove (41) at the position corresponding to the guide pipe (4), the guide pipe (4) is fixed with a barrier net (42), and the water tank (3) is fixed with an overflow pipe (44) on the side.

9. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 5, characterized in that: The water storage tank (3) is rotatably connected to a rotating shaft (43), one end of which is fixed with a vibrating cam (431), and the other end extends out of the water storage tank (3).

10. A primary and secondary integrated pole-mounted circuit breaker with a protective disconnecting switch according to claim 9, characterized in that: The end of the mounting shaft (37) away from the second synchronous pulley (373) and the end of the rotating shaft (43) extending out of the water tank (3) are both fixed with a third synchronous pulley (432). The two third synchronous pulleys (432) are connected by a second synchronous belt (433). The side of the water tank (3) away from the first protective shell (36) is fixed with a second protective shell (434).

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