A detachable cable branch box adapted to a smart grid

Abstract

The application relates to the technical field of cable branch box equipment, and discloses a detachable cable branch box suitable for smart power grids, which comprises a bottom box, a top box provided on the top of the bottom box and used for distributing and switching cables, sealing flaps provided on the two sides of the top box and used for sealing the inside of the top box, cable connecting seats provided on the lower middle parts of the two sides of the front end of the top box and used for connecting incoming cables, sealing covers provided on the cable connecting seats, an electric appliance box arranged in the inside of the top box, and a distributor arranged in the inside of the electric appliance box. By increasing and arranging the micro-pressure anti-reverse mechanism, the mechanism can continuously maintain the micro-positive pressure state of the heat exchange cavity during the operation of the cable branch box, can offset the local negative pressure effect caused by the day-night temperature difference and internal airflow fluctuation, can prevent the reverse infiltration of external high-humidity salt mist air from the splicing gap and the back outlet, and can eliminate the long-term corrosion hidden danger caused by the hidden infiltration.

Description

Technical Field

[0001] This invention relates to the field of cable branch box equipment technology, specifically a detachable cable branch box adapted to smart grids. Background Technology

[0002] Cable distribution boxes are core equipment in power distribution systems, enabling cable branching, switching, and power distribution. They are widely used in coastal outdoor power distribution networks. To ensure the stable operation of current-carrying components such as copper busbars and conductive connectors, the box must have sufficient heat exchange and dissipation capacity to prevent contact failures and insulation degradation caused by prolonged excessive temperature rise. However, the high humidity and large amount of salt spray particles in the coastal outdoor environment mean that conventional ventilation structures designed to meet heat exchange requirements directly introduce high-humidity, salty air from outside into the box. Moisture in the air easily condenses on the surface of conductive components upon cooling, while salt spray particles gradually settle and adhere. Over time, this can cause electrochemical corrosion of conductive connectors, increased contact resistance, and consequently, overheating and insulation flashover, posing a direct threat to the reliable operation of the power distribution lines.

[0003] Besides active ventilation channels, structurally weak points such as the cable outlets on the back of the enclosure and gaps in the panel joints are also hidden pathways for salt spray and moisture intrusion. Under the influence of diurnal temperature variations and internal airflow, localized negative pressure or air pressure fluctuations can easily occur inside the enclosure. High-humidity salt spray air from the outside, under the influence of air pressure differences, will slowly seep into the equipment through assembly gaps and micro-seams at the cable outlets on the back. This infiltration process is slow and concealed, making it difficult to detect in the early stages during routine maintenance and inspections. The infiltrated moisture and salt particles accumulate continuously in the dead air zones on the back, gradually eroding the back and inner connection points of the copper busbars, further exacerbating equipment wear and tear and safety hazards, and increasing the difficulty and cost of later maintenance and repair. Therefore, those skilled in the art have proposed a detachable cable branch box adapted to smart grids to solve the aforementioned technical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a detachable cable branch box adapted to smart grids, solving the problem of cable branch boxes being affected by moisture and salt crystallization in coastal high-humidity and high-salt environments.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detachable cable branch box adapted to smart grids, comprising, The bottom box has a top box for cable distribution and transfer. Both sides of the top box have sealed flip covers to enclose the interior. The lower middle part of the front of the top box has cable connectors for connecting incoming cables, and each cable connector has a sealing cover. The top box contains an electrical box, which contains a distributor. A copper busbar is installed on one side of the distributor. An isolation heat exchange mechanism, located inside the electrical box, is used to exchange the heat emitted by the operation of internal electrical components using an isolation heat exchange method; The micro-pressure anti-backflow mechanism is located inside the bottom box and is used to maintain a micro-positive pressure inside the electrical box to prevent moisture and salt spray from the external environment from flowing back into the equipment. The enclosed protection mechanism, located inside the electrical box, is used to protect the internal smart grid's sensing components from strong electromagnetic pulses generated during equipment failure. An auxiliary treatment mechanism, located inside the electrical box, is used to assist in removing moisture and salt spray that enters the equipment from the electrical components.

[0006] Preferably, the heat exchange isolation mechanism includes an alloy partition plate. The alloy partition plate is provided in the middle of the inner side of the electrical box. The alloy partition plate divides the interior of the electrical box into two independent chambers: a front electrified chamber and an internal heat exchange chamber. Multiple sets of wiring ports are provided at equal intervals on the alloy partition plate, and each wiring port is provided with a fireproof sealing ring.

[0007] Preferably, the isolation heat exchange mechanism includes a ceramic heat-conducting seat. Multiple ceramic heat-conducting seats are equidistantly arranged on the alloy partition. One end of the ceramic heat-conducting seat is in contact with the surface of the wiring copper busbar, and the other end of the ceramic heat-conducting seat passes through the alloy partition and extends into the internal heat exchange cavity. The surface of the ceramic heat-conducting seat is coated with thermally conductive silicone grease to reduce thermal resistance. Multiple sets of metal fins are equidistantly and vertically arranged on the outer wall surface of the internal heat exchange cavity. The metal fins are connected to the corresponding positions of the ceramic heat-conducting seat by bolts.

[0008] Preferably, the micro-pressure anti-reverse mechanism includes a ventilation seat. The ventilation seat is located at the upper front part of the bottom box. A stainless steel insect-proof net is provided on the outer surface of the ventilation seat. A glass fiber filter plate is provided on one side of the interior of the ventilation seat. An activated carbon filter plate is provided in the middle of the inner side of the ventilation seat. An installation seat is provided on the other side of the interior of the ventilation seat. A pressure-stabilizing fan is provided on both sides of the interior of the installation seat. A conveying cover is provided at the rear of the ventilation seat. The end of the conveying cover penetrates through the top box and extends into the internal heat exchange chamber. A barrier net seat is provided on the end of the conveying cover.

[0009] Preferably, the micro-pressure anti-reverse mechanism further includes an exhaust seat, an exhaust seat is provided on the upper rear side of the top box, gravity check valves are provided on both sides of the exhaust seat, and a rain cover is provided on the rear middle part of the top of the exhaust seat.

[0010] Preferably, the micro-pressure anti-reverse mechanism further includes a cable outlet seat. The cable outlet seat is provided in the middle of the rear side of the top box. The cable outlet seat has multiple inclined openings at equal intervals in the middle. The interior of each inclined opening is provided with multiple layers of annular sealing rubber rings.

[0011] Preferably, the enclosed protective mechanism includes a wiring trough. The wiring trough is provided on the inner wall of the front energized cavity of the electrical box. Multiple insulating wire clips are equidistantly arranged inside the wiring trough. A galvanized layer is provided on the inner wall of the wiring trough. Sliding folding insulating plates are slidably connected to both sides of the inner wall of the front energized cavity of the electrical box.

[0012] Preferably, the auxiliary processing mechanism includes a diversion cavity. Multiple diversion cavities are equidistantly arranged on both sides of the bottom of the electrical box. A diversion hood is provided in the middle of the bottom of the inner side of the top box to connect the diversion cavities with the inside of the conveying hood. Multiple sets of trapezoidal exhaust slots are equidistantly arranged on both sides of the outer wall of the electrical box. Multiple strip cavities are equidistantly arranged inside the electrical box, and each strip cavity is connected to each set of trapezoidal exhaust slots. A nano-hydrophobic and waterproof layer is provided on the inner wall of the top box and the sealed flip cover.

[0013] Working Principle: Before the cable branch box is put into use, the operator first connects the end of the main input cable to the cable connector on the top of the box. After the current is distributed by the distributor inside the box, each branch cable is then connected to the corresponding cable outlet on the side of the top box to complete the physical connection of the line. After the equipment is powered on, the isolation heat exchange mechanism enters the working state simultaneously. The copper busbars on the distributor generate Joule heat due to current carrying. The heat is efficiently conducted through the tightly fitting contact surface to the ceramic heat conduction seat correspondingly arranged on the alloy partition. The ceramic heat conduction seat diffuses the heat to the alloy partition body on one hand, and simultaneously transfers the heat to the surface of the metal fins at its end on the other hand. The extended structure of the fins greatly expands the effective heat exchange area, allowing the heat generated by the current carrying element to dissipate quickly and continuously to the outside, avoiding excessive local temperature rise. All cables passing through the alloy partition pass through the cable entry port, which is embedded inside. The fireproof sealing ring tightly wraps around the outer wall of the cable, ensuring insulation protection at the cable crossing point and achieving complete sealing separation between the front energized chamber and the internal heat exchange chamber. This ensures that the two chambers are independent and do not communicate with each other. During use, air from the external environment is discharged into the internal heat exchange chamber of the electrical box through the barrier mesh seat on the conveyor cover. The gas entering the internal heat exchange chamber flows through the ceramic heat-conducting seat and its metal fins before being discharged from the exhaust seat at the top. The heat exchange airflow only flows within the internal heat exchange chamber of the electrical box and does not enter the front energized chamber inside the electrical box. During this process, moisture and salt spray from the external environment are completely blocked within the internal heat exchange chamber of the electrical box, thus ensuring the normal operation of the distributor, wiring copper busbar and other conductive connectors inside the cable branch box. This completes the isolation and heat exchange treatment of the cable branch box during use.While the heat exchange mechanism is operating, the low-pressure anti-reverse mechanism is also activated. During the operation of the cable branch box, the pressure-stabilizing fan fixed on the mounting base starts running, continuously drawing air from the external environment and supplying it into the box. The outside air first flows through the stainless steel insect-proof mesh at the inlet of the ventilation seat, intercepting large impurities such as flying insects and dust. After preliminary purification, the air then passes through the fiberglass filter plate and activated carbon filter plate in sequence. Through physical filtration and adsorption, salt spray particles and water vapor in the air are removed, completing the deep purification treatment of the air. The purified clean air is guided by the conveyor hood, then evenly distributed through the barrier mesh seat, and then smoothly sent into the box. The internal heat exchange chamber of the electrical box maintains a slightly positive pressure, slightly higher than the external environment. Clean airflow entering the heat exchange chamber carries internal heat, completes heat exchange, and then exits. Because the internal pressure of the electrical box is consistently higher than the external pressure, during use, only internal air tends to leak out through the surface seams and cable outlets. High-humidity, salt-spray air from the external environment cannot intrude into the cable branch box, preventing contamination and corrosion of the internal wiring copper busbars and electrical connectors. This effectively controls the external airflow from the cable branch box during use. The system includes measures to prevent backflow intrusion; simultaneously, the enclosed protective mechanism provides electromagnetic protection. Because cable branch boxes need to adapt to the operational requirements of smart grids, numerous intelligent sensors and data transmission components need to be installed inside the bottom of the box. During operation, the opening and closing operations of high-voltage circuits and the strong electromagnetic pulses generated by short-circuit faults can couple to the sensor circuits and electronic components through radiation and induction, causing problems such as fluctuating data acquisition, terminal equipment crashes, and malfunctioning protection logic, affecting the reliability of equipment operation. Therefore, during use, the front of the electrical box... The cables that connect to the sensors and are used for data exchange in the energized compartment are neatly placed in the cable trays and fixed section by section with insulated wire clips to prevent the cables from loosening or shifting. During use, the galvanized layer on the surface of the cable trays and the sliding folding insulating plates that have been unfolded work together to form a metal conductor electromagnetic shielding structure with an effect similar to Faraday cage. This effectively blocks the strong radiated electromagnetic fields generated during the opening and closing of circuit breakers and short circuits in the front energized cavity of the electrical box, greatly attenuating the intensity of the electromagnetic field that penetrates into the bottom box. This fundamentally prevents damage to sensitive electronic components caused by strong pulse radiation and ensures the stable operation of the intelligent monitoring function.During equipment operation, the auxiliary treatment mechanism operates synchronously and collaboratively to further enhance the protective effect. Clean gas, after multiple treatments within the ventilation seat, is partially guided through a diversion hood into the diversion chamber at the bottom of the electrical box. After being evenly distributed within the diversion chamber, the airflow enters corresponding strip-shaped chambers within the electrical box. The airflow within these chambers is then directed upwards through trapezoidal exhaust ducts on the outer wall of the electrical box, forming a continuous jet-like protective air curtain around the electrical box. This air curtain, through its entrainment and dispersion effect, pushes a small amount of salt spray and moisture that has seeped into the cable branch box to the inner wall surface of the top box. The temperature difference between the wall surface and the internal airflow assists in condensation. Furthermore, the nano-hydrophobic and waterproof layer on the inner wall of the top box prevents direct erosion of the box by condensed water and salt, preventing long-term salt deposition and equipment corrosion damage. This completes the auxiliary protective treatment of the internal environment of the cable branch box.

[0014] This invention provides a detachable cable branch box adapted to smart grids. It has the following advantages: 1. By adding and setting an isolation heat exchange mechanism, the present invention adopts an air-electric separation isolation heat exchange architecture during the operation of the cable branch box. On the one hand, the operating heat of the wiring copper busbar is efficiently discharged through a solid heat conduction path, which meets the heat dissipation requirements of the current-carrying components without opening the ventilation of the energized cavity, thus avoiding contact failure and insulation deterioration caused by long-term excessive temperature rise. On the other hand, external salt spray and moisture are completely blocked on the heat exchange cavity side, preventing salt-containing humid air from directly contacting the conductive connectors, thereby reducing the risk of condensation adhesion and electrochemical corrosion from the source.

[0015] 2. By adding and setting a micro-pressure anti-reverse mechanism, this invention can continuously maintain a micro-positive pressure state in the heat exchange chamber during the operation of the cable branch box. This not only counteracts the local negative pressure effect caused by the diurnal temperature difference and internal airflow fluctuations, preventing high-humidity salt mist air from seeping back from the splicing gaps and the back outlet, thus eliminating the long-term corrosion risk caused by hidden leakage, but also, in conjunction with a multi-stage air filtration structure, purifies, desalinates, and dehumidifies the airflow entering the heat exchange chamber, further reducing the internal salt mist deposition rate.

[0016] 3. By adding and setting up a closed protection mechanism, this invention first forms an electromagnetic shielding barrier based on the metal cable tray and folded shielding structure during the operation of the cable branch box. This barrier blocks the strong electromagnetic pulses generated by high-voltage side switching and short-circuit faults from radiating to the secondary sensing elements, reducing the probability of data jumps and protection malfunctions. Secondly, it organizes, fixes and shields the signal cables to reduce line induced interference, ensures the stable operation of intelligent monitoring components, and adapts to the end-sensing requirements of the smart grid.

[0017] 4. By adding and setting auxiliary processing mechanisms, this invention can not only drive away the small amount of salt mist and moisture that seeps into the box from the area of ​​the live components through the directional spray protective air curtain during the operation of the cable branch box, but also guide it to converge on the inner wall of the box, reducing the deposition and condensation of salt particles on the surface of the conductive connectors. In addition, it can also work with the hydrophobic coating on the inner wall to reduce the adhesion of condensate, avoid long-term accumulation of salt that corrodes the box structure and electrical components, and enhance the environmental tolerance of the equipment. Attached Figure Description

[0018] Figure 1 This is a diagram of the front structure of the invention in its closed state; Figure 2 This is a schematic diagram of the rear side of the invention in its closed state; Figure 3 This is a side view of the structure of the present invention in its open state; Figure 4 This is a cross-sectional view of the internal structure of the present invention; Figure 5 This is a cross-sectional schematic diagram of the internal structure of the ventilation seat of the present invention; Figure 6 This is a partial structural diagram of the exhaust seat of the present invention; Figure 7 This is a cross-sectional schematic diagram of the electrical box cavity structure of the present invention; Figure 8 This is a partial cross-sectional view of the internal structure of the electrical box of the present invention.

[0019] The components include: 1. Bottom box; 2. Ventilation seat; 3. Cable connector; 4. Sealed flip cover; 5. Top box; 6. Sealing cover; 7. Cable outlet; 8. Sloping opening; 9. Rain cover; 10. Exhaust seat; 11. Multi-layer annular sealing ring; 12. Trapezoidal exhaust duct; 13. Nano-hydrophobic and waterproof layer; 14. Electrical box; 15. Distributor; 16. Wiring copper busbar; 17. Alloy partition; 18. Ceramic thermal conductive material. 19. Metal fins; 20. Cable tray; 21. Barrier mesh seat; 22. Diverter hood; 23. Conveyor hood; 24. Fiberglass filter plate; 25. Activated carbon filter plate; 26. Mounting seat; 27. Voltage stabilizing fan; 28. Gravity check valve; 29. ​​Cable tray; 30. Sliding folding insulation plate; 31. Galvanized layer; 32. Insulated wire clamp; 33. Strip cavity; 34. Diverter cavity; 35. Fireproof sealing ring. Detailed Implementation

[0020] The technical solutions in 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.

[0021] Please see the appendix Figure 1 -Appendix Figure 2 This invention provides a detachable cable branch box adapted to a smart grid, including a bottom box 1, a top box 5 for cable distribution and transfer at the top of the bottom box 1, sealed flip covers 4 for sealing the interior on both sides of the top box 5, cable connectors 3 for connecting incoming cables on both sides of the lower middle part of the front end of the top box 5, and sealing covers 6 on each cable connector 3; an electrical box 14 is installed inside the top box 5, a distributor 15 is installed inside the electrical box 14, and a wiring copper busbar 16 is installed on one side of the distributor 15; Please see the appendix Figure 3 -Appendix Figure 4 An isolation heat exchange mechanism is installed inside the electrical box 14 to exchange the heat emitted by the operation of the internal electrical components using an isolation heat exchange method. The heat exchange isolation mechanism includes a ceramic heat-conducting seat 18. Multiple ceramic heat-conducting seats 18 are equidistantly arranged on the alloy partition 17. One end of the ceramic heat-conducting seat 18 is attached to the surface of the wiring copper busbar 16, and the other end of the ceramic heat-conducting seat 18 passes through the alloy partition 17 and extends into the internal heat exchange cavity. The surface of the ceramic heat-conducting seat 18 is coated with thermal grease to reduce thermal resistance. Multiple sets of metal fins 19 are equidistantly and vertically arranged on the outer wall surface of the ceramic heat-conducting seat 18. The metal fins 19 are connected to the corresponding positions of the ceramic heat-conducting seat 18 by bolts.

[0022] When the isolation heat exchange mechanism is started, the copper busbar 16 on the distributor 15 generates Joule heat due to current carrying. The heat is efficiently conducted through the tightly fitting contact surface to the ceramic heat-conducting seat 18 correspondingly arranged on the alloy partition 17. The ceramic heat-conducting seat 18 diffuses the heat to the alloy partition 17 body on the one hand, and transfers the heat to the surface of the metal fins 19 at its end on the other hand. The effective heat exchange area is greatly expanded through the extension structure of the fins, so that the heat generated by the current-carrying element can be quickly and continuously dissipated to the outside, avoiding excessive local temperature rise. All cables passing through the alloy partition 17 pass through the cable ...

[0023] The heat exchange isolation mechanism includes an alloy partition 17. The alloy partition 17 is provided in the middle of the inner side of the electrical box 14. The alloy partition 17 divides the interior of the electrical box 14 into two independent chambers: the front electrified chamber and the internal heat exchange chamber. Multiple sets of wiring ports 20 are provided at equal intervals on the alloy partition 17. Each wiring port 20 is provided with a fireproof sealing ring 35.

[0024] During use, air from the external environment is discharged into the internal heat exchange chamber of the electrical box 14 through the barrier mesh seat 21 on the conveying cover 23. The gas entering the internal heat exchange chamber flows through the ceramic heat-conducting seat 18 and the metal fins 19 thereon, and is then discharged from the exhaust seat 10 at the top. The heat exchange airflow only flows within the internal heat exchange chamber of the electrical box 14 and does not enter the front electrified compartment of the electrical box 14. During this process, moisture and salt spray from the external environment are completely blocked within the internal heat exchange chamber of the electrical box 14, thereby ensuring the normal operation of the distributor 15, the wiring copper busbar 16 and other conductive connectors inside the cable branch box, thus completing the isolation heat exchange treatment of the cable branch box during use.

[0025] Please see the appendix Figure 4 -Appendix Figure 6 The micro-pressure anti-reverse mechanism is installed inside the bottom box 1 to maintain a micro-positive pressure inside the electrical box 14 and prevent moisture and salt spray from the external environment from flowing back into the equipment. The micro-pressure anti-reverse mechanism includes a ventilation seat 2. The ventilation seat 2 is located at the upper front part of the bottom box 1. A stainless steel insect screen is installed on the outer surface of the ventilation seat 2. A glass fiber filter plate 24 is installed on one side of the interior of the ventilation seat 2. An activated carbon filter plate 25 is installed in the middle of the inner side of the ventilation seat 2. An installation seat 26 is installed on the other side of the interior of the ventilation seat 2. A pressure stabilizing fan 27 is installed on both sides of the interior of the installation seat 26. A conveying cover 23 is installed at the rear of the ventilation seat 2. The end of the conveying cover 23 passes through the top box 5 and extends into the internal heat exchange chamber. A barrier mesh seat 21 is installed on the end of the conveying cover 23.

[0026] When the micro-pressure anti-reverse mechanism is activated, the pressure-stabilizing fan 27 fixed on the mounting base 26 starts operating during the operation of the cable branch box, continuously drawing air from the external environment and delivering it into the box. The outside air first flows through the stainless steel insect-proof net at the inlet of the ventilation seat 2, intercepting large impurities such as flying insects and floating dust in the air. After preliminary purification, the air then passes through the glass fiber filter plate 24 and the activated carbon filter plate 25 in sequence. Through physical filtration and adsorption, the salt spray particles and water vapor in the air are removed, completing the deep purification treatment of the air. The purified clean air is guided by the conveying cover 23, and then evenly distributed through the barrier mesh seat 21 before being smoothly sent into the internal heat exchange chamber of the electrical box 14. This keeps the air pressure inside the heat exchange chamber at a slightly positive pressure state that is slightly higher than that of the external environment. The clean airflow entering the internal heat exchange chamber of the electrical box 14 carries internal heat and completes heat exchange before being discharged to the outside.

[0027] Because the air pressure inside the electrical box 14 is consistently higher than that outside, during the use of the cable branch box, there is only a tendency for internal air to leak out at the surface splicing gaps and cable outlets. The high humidity salt spray air in the external environment cannot penetrate back into the cable branch box, thus avoiding pollution and corrosion damage to the internal wiring copper busbar 16 and electrical connectors. This completes the backflow prevention treatment of external gas intrusion during the use of the cable branch box.

[0028] The micro-pressure anti-reverse mechanism also includes an exhaust seat 10. An exhaust seat 10 is provided on the upper rear side of the top box 5. Gravity check valves 28 are provided on both sides of the interior of the exhaust seat 10. A rain cover 9 is provided on the middle and rear part of the top of the exhaust seat 10.

[0029] When the heat exchange gas in the internal heat exchange chamber of the electrical box 14 is discharged through the exhaust seat 10, the gravity check valve 28 installed on it allows only air to be discharged outward, and air from the external environment cannot flow back into its interior.

[0030] The micro-pressure anti-reverse mechanism also includes a cable outlet seat 7. The cable outlet seat 7 is located in the middle of the rear side of the top box 5. Multiple inclined openings 8 are equidistantly opened in the middle of the cable outlet seat 7. The interior of each inclined opening 8 is provided with multiple layers of annular sealing rings 11.

[0031] When the cable is discharged, the downward-sloping opening 8 prevents moisture from accumulating and condensing at the connection point, and the multi-layered annular sealing ring 11 also enhances the sealing effect and improves the stability of the cable during use.

[0032] Please see the appendix Figure 7 The enclosed protection mechanism is located inside the electrical box 14 and is used to generate a strong electromagnetic pulse to protect the sensing components of the internal smart grid in the event of equipment failure. The enclosed protective mechanism includes a cable tray 29. The cable tray 29 is provided on the inner wall of the front energized cavity of the electrical box 14. Multiple insulating wire clips 32 are equidistantly arranged inside the cable tray 29. A galvanized layer 31 is provided on the inner wall of the cable tray 29. Sliding folding insulating plates 30 are slidably connected to both sides of the inner wall of the front energized cavity of the electrical box 14.

[0033] When the enclosed protection mechanism is activated, the cable branch box needs to be adapted to the operation requirements of the smart grid. A large number of intelligent sensing and data transmission components need to be installed inside the bottom box 1 of the cable branch box. During the operation of the cable branch box, the opening and closing operations of the high-voltage circuit and the strong electromagnetic pulses generated by short-circuit faults will be coupled to the sensor circuits and electronic components through radiation, induction and other means. This will cause problems such as data acquisition jumps, terminal equipment crashes and protection logic malfunctions during the use of the cable branch box, affecting the reliability of equipment operation.

[0034] Therefore, during use, the cables connected to the sensors and used for data interaction in the front energized compartment of the electrical box 14 are neatly placed in the cable tray 29 and fixed segment by segment by the insulating cable clips 32 to prevent the cables from loosening or shifting. During use, the galvanized layer 31 on the surface of the cable tray 29 and the unfolded sliding folding insulating plate 30 work together to form a metal conductor electromagnetic shielding structure with an approximate Faraday cage effect. This effectively blocks the strong radiated electromagnetic field generated during the opening and closing of the circuit breaker and short circuit in the front energized cavity of the electrical box 14, greatly attenuating the electromagnetic field strength that penetrates into the bottom box 1. This fundamentally prevents damage to sensitive electronic components caused by strong pulse radiation and ensures the stable operation of the intelligent monitoring function.

[0035] Please see the appendix Figure 8 An auxiliary treatment mechanism, located inside the electrical box 14, is used to assist in removing moisture and salt spray entering the equipment from electrical components.

[0036] The auxiliary processing mechanism includes a diversion chamber 34. Multiple diversion chambers 34 are equally spaced on both sides of the bottom of the electrical box 14. A diversion hood 22 is provided in the middle of the bottom of the inner side of the top box 5 to connect the diversion chambers 34 with the inside of the conveying hood 23. Multiple sets of trapezoidal exhaust troughs 12 are equally spaced on both sides of the outer wall of the electrical box 14. Multiple strip cavities 33 are equally spaced inside the electrical box 14, and each strip cavity 33 is connected to each set of trapezoidal exhaust troughs 12. A nano-hydrophobic and waterproof layer 13 is provided on the inner wall of the top box 5 and the sealed flip cover 4.

[0037] When the auxiliary processing mechanism is activated, the protective effect is further enhanced. After multiple treatments inside the air exchange seat 2, a portion of the clean gas is guided into the diversion chamber 34 at the bottom of the electrical box 14 through the diversion hood 22. After being evenly distributed by the diversion chamber 34, the airflow enters the corresponding strip chambers 33 inside the electrical box 14. The airflow in the strip chambers 33 is sprayed upward into the top box 5 in the form of a directional jet through the corresponding trapezoidal exhaust slots 12 on the outer wall of the electrical box 14, thereby forming a continuous jet-shaped protective air curtain around the electrical box 14.

[0038] Through the enveloping and dispersing effect of this air curtain, a small amount of salt spray and moisture that has seeped into the cable branch box is pushed to the inner wall surface of the top box 5. The temperature difference between the wall surface and the internal airflow assists in the condensation of water vapor. Then, the nano-hydrophobic and waterproof layer 13 on the inner wall of the top box 5 blocks the direct erosion of the box body by the condensed water and salt, preventing long-term salt deposition from causing equipment corrosion and damage. This completes the auxiliary protection treatment of the internal environment of the cable branch box.

[0039] 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 detachable cable branch box adapted to smart grids, characterized in that, include, Bottom box (1), top box (5) for cable distribution and transfer is provided on the top of bottom box (1), sealed flip cover (4) for sealing the inside is provided on both sides of top box (5), cable connector (3) for cable connection is provided on both sides of the lower middle part of the front end of top box (5), and sealing cover (6) is provided on the cable connector (3). An electrical box (14) is installed inside the top box (5), a distributor (15) is installed inside the electrical box (14), and a wiring copper busbar (16) is installed on one side of the distributor (15). An isolation heat exchange mechanism is installed inside the electrical box (14) to exchange the heat emitted by the operation of the internal electrical components by means of isolation heat exchange. The micro-pressure anti-reverse mechanism is set inside the bottom box (1) to maintain a micro-positive pressure inside the electrical box (14) and prevent moisture and salt spray from the external environment from flowing back into the equipment. The enclosed protection mechanism is installed inside the electrical box (14) and is used to enclose and protect the internal smart grid sensing components by generating strong electromagnetic pulses when the equipment fails. An auxiliary treatment mechanism, located inside the electrical box (14), is used to assist in removing moisture and salt spray entering the equipment from electrical components.

2. A detachable cable branch box adapted to a smart grid according to claim 1, characterized in that, The heat exchange isolation mechanism includes an alloy partition (17). The inner middle of the electrical box (14) is provided with an alloy partition (17). The alloy partition (17) divides the interior of the electrical box (14) into two independent chambers: the front electrified chamber and the internal heat exchange chamber. Multiple sets of wire holes (20) are provided at equal intervals on the alloy partition (17). Each wire hole (20) is provided with a fireproof sealing ring (35).

3. A detachable cable branch box adapted to a smart grid according to claim 2, characterized in that, The isolation heat exchange mechanism includes a ceramic heat-conducting seat (18). Multiple ceramic heat-conducting seats (18) are equidistantly arranged on the alloy partition (17). One end of the ceramic heat-conducting seat (18) is attached to the surface of the wiring copper busbar (16). The other end of the ceramic heat-conducting seat (18) passes through the alloy partition (17) and extends into the internal heat exchange cavity. The surface of the ceramic heat-conducting seat (18) is coated with thermal grease to reduce thermal resistance. Multiple sets of metal fins (19) are equidistantly and vertically arranged on the outer wall surface of the internal heat exchange cavity. The metal fins (19) are connected to the corresponding positions of the ceramic heat-conducting seat (18) by bolts.

4. A detachable cable branch box adapted to a smart grid according to claim 1, characterized in that, The micro-pressure anti-reverse mechanism includes a ventilation seat (2). The ventilation seat (2) is provided at the upper front end of the bottom box (1). A stainless steel insect-proof net is provided on the outer surface of the ventilation seat (2). A glass fiber filter plate (24) is provided on one side inside the ventilation seat (2). An activated carbon filter plate (25) is provided in the middle of the inner side of the ventilation seat (2). An installation seat (26) is provided on the other side inside the ventilation seat (2). A pressure-stabilizing fan (27) is provided on both sides inside the installation seat (26). A conveying cover (23) is provided at the tail end of the ventilation seat (2). The end of the conveying cover (23) passes through the top box (5) and extends into the internal heat exchange chamber. A barrier net seat (21) is provided on the end of the conveying cover (23).

5. A detachable cable branch box adapted to a smart grid according to claim 1, characterized in that, The micro-pressure anti-reverse mechanism also includes an exhaust seat (10). An exhaust seat (10) is provided on the upper rear side of the top box (5). Gravity check valves (28) are provided on both sides of the interior of the exhaust seat (10). A rain cover (9) is provided on the middle and rear part of the top of the exhaust seat (10).

6. A detachable cable branch box adapted to a smart grid according to claim 1, characterized in that, The micro-pressure anti-reverse mechanism also includes a cable outlet seat (7). The cable outlet seat (7) is provided in the middle of the rear side of the top box (5). Multiple inclined openings (8) are equidistantly opened in the middle of the cable outlet seat (7). Multiple layers of annular sealing rings (11) are provided inside the inclined openings (8).

7. A detachable cable branch box adapted to a smart grid according to claim 1, characterized in that, The enclosed protective mechanism includes a wiring trough (29). The wiring trough (29) is provided on the inner wall of the front energized cavity of the electrical box (14). Multiple insulating wire clips (32) are equidistantly arranged inside the wiring trough (29). A galvanized layer (31) is provided on the inner wall of the wiring trough (29). Sliding folding insulating plates (30) are slidably connected to both sides of the inner wall of the front energized cavity of the electrical box (14).

8. A detachable cable branch box adapted to a smart grid according to claim 1, characterized in that, The auxiliary processing mechanism includes a diversion cavity (34). Multiple diversion cavities (34) are equally spaced on both sides of the bottom of the electrical box (14). A diversion hood (22) is provided in the middle of the bottom of the inner side of the top box (5) to connect the diversion cavity (34) with the inside of the conveying hood (23). Multiple sets of trapezoidal exhaust troughs (12) are equally spaced on both sides of the outer wall of the electrical box (14). Multiple strip cavities (33) are equally spaced inside the electrical box (14), and each strip cavity (33) is connected to each set of trapezoidal exhaust troughs (12). A nano-hydrophobic and waterproof layer (13) is provided on the inner wall of the top box (5) and the sealed flip cover (4).

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