Outdoor metal cable branch box based on intelligent monitoring and early warning technology

Abstract

The application discloses an outdoor metal cable branch box based on intelligent monitoring and early warning technology and belongs to the technical field of cable branch boxes. Specifically, the outdoor metal cable branch box comprises a branch box and a control panel for intelligent monitoring and early warning. The left and right ends of the branch box are each provided with a plurality of ventilation openings, and a wind plate is rotatably arranged at each ventilation opening. A drying and dehumidifying structure is arranged on the inner side of one group of ventilation openings. The application is based on a multi-source sensing information fusion perception decision mechanism. The system judges the state of the cable body and the environment inside and outside the box through comprehensive real-time detection data, realizes real-time capture and intelligent decision making of abnormalities, and realizes double-mode self-adaptive regulation and control of heat dissipation and dehumidification internal and external circulation switching through changing the opening and closing mode of the ventilation openings and cooperating with the drying and dehumidifying structure based on the temperature and humidity and dew point monitoring conditions inside and outside the box, so as to effectively balance heat dissipation and dehumidification and efficiently solve the dehumidification problem under the non-closed working condition of the box.

Description

Technical Field

[0001] This invention relates to the field of cable branch box technology, and more specifically, to outdoor metal cable branch boxes based on intelligent monitoring and early warning technology. Background Technology

[0002] A cable distribution box is a metal-cased switchgear installed outdoors. It plays an important role in power systems and is mainly used in medium-voltage distribution networks as a node for cables to receive, distribute and control electrical energy. It is widely used in urban power grids, industrial parks, residential communities, commercial centers and other places, and is commonly found on roadsides, in green belts or at substation outlets.

[0003] Compared to indoor cable distribution boxes, outdoor cable distribution boxes are located in harsher environments, especially in areas with high heat and humidity. Traditional fixed ventilation holes are a passive and low-cost heat dissipation solution, but at the cost of becoming the main intrusion route for humid air, leading to condensation, which can cause insulation degradation, corrosion, or even short circuits.

[0004] A search revealed that a cable branch box with intelligent early warning, disclosed in patent number CN120033618A, automatically adjusts the cooling frequency based on changes in temperature or humidity. The method of adjusting the cooling frequency is to actively force air cooling using a stepped trigger ventilation structure. However, it lacks effective humidity management capabilities, the air outlet cannot be completely sealed, and it is not equipped with any active dehumidification elements. Therefore, it cannot solve the condensation problem in high humidity environments. The non-sealed ventilation structure may even exacerbate the condensation problem, making it difficult to achieve a balance between heat dissipation and moisture prevention. In the long run, this will lead to a decline in the performance of the branch box.

[0005] To address the practical technical issues, an outdoor metal cable branch box based on intelligent monitoring and early warning technology is proposed. Summary of the Invention

[0006] The purpose of this invention is to solve the limitations of existing cable branch box monitoring technology, and to provide an outdoor metal cable branch box based on intelligent monitoring and early warning technology.

[0007] The objective of this invention can be achieved through the following technical solution: an outdoor metal cable branch box based on intelligent monitoring and early warning technology, including a branch box, a mounting frame for cable installation set inside the branch box, and a control panel for intelligent monitoring and early warning. Multiple ventilation openings are provided on the outer walls of both the left and right ends of the branch box, and a wind plate is rotatably installed at each ventilation opening. Multiple wind plates located on the same side are driven to rotate synchronously through a linkage mechanism, and ventilation and protective frames located outside the wind plates are fixedly installed on the outer sides of both the left and right sides of the branch box. The branch box is fixedly installed with a drying and dehumidification structure located between one of the vents and the mounting bracket. It includes a guide frame and a dehumidifier installed together. The guide frame is sealed and connected to one end of the vent. The left and right ends of the dehumidifier are the air outlet and the air inlet. The guide frame is provided with an internal circulation port for connecting the air inlet. The guide frame is also equipped with an internal circulation opening and closing mechanism adapted to the internal circulation port. The control panel includes a sensor acquisition module, an analysis and decision-making module, a mode switching execution module, and an early warning module. The sensor acquisition module is used to collect comprehensive data composed of parameters inside the box, environmental parameters, and cable parameters, and sends the comprehensive data to the analysis and decision-making module. The analysis and decision-making module is used to intelligently analyze and make decisions on the current operating status of the cable branch box based on the comprehensive data, and sends the analysis and decision-making results to the mode switching execution module and the early warning module. The early warning module issues intelligent warnings, and the mode switching execution module makes switching and control of internal and external adaptive heat dissipation-dehumidification dual modes.

[0008] Furthermore, the upper and lower ends of the air plate are rounded, and the top of the air plate is rotatably mounted inside the top of the ventilation opening via a rotating shaft. The linkage mechanism includes a drive box embedded in the inner wall of the rear side of the branch box and a drive motor mounted on the rear wall of the drive box. One end of the rotating shaft passes through the drive box, and the drive box is equipped with a transmission wheel-transmission belt transmission assembly for linking multiple rotating shafts and the drive end of the drive motor.

[0009] Furthermore, the internal circulation port is provided with four ports, which are respectively distributed at the four corners of the guide frame, and the internal circulation port has an L-shaped structure.

[0010] Furthermore, the internal circulation opening and closing mechanism includes two U-shaped sealing plates distributed at the front and rear positions of the guide frame. The U-shaped sealing plates are slidably installed in a pair of internal circulation ports distributed vertically on the same side. A movable plate is fixedly installed at the top of each pair of U-shaped sealing plates. A bidirectional drive assembly for driving the two movable plates to move is installed at the top of the branch box.

[0011] Furthermore, the bidirectional drive assembly includes a support frame fixedly installed on the top of the branch box. A bidirectional screw rod is rotatably installed between the bottom of the support frame, passing through a pair of movable plates in sequence. Both ends of the bidirectional screw rod are provided with external threads that are threaded into the pair of movable plates and arranged in opposite directions. A rotary motor for rotating and driving the bidirectional screw rod is fixed on the support frame.

[0012] Furthermore, the parameters inside the enclosure include the surface temperature and dew point temperature inside the enclosure; the environmental parameters include the ambient temperature and ambient humidity; and the cable parameters include the temperature rise rate of the cable joint, the discharge signal strength, and the current fluctuation value during cable operation, wherein the current fluctuation value is the difference between the operating current and the rated current.

[0013] Furthermore, the process of intelligent analysis and decision-making on the current operating status of the cable branch box includes: comparing the cable joint temperature rise rate, discharge signal strength, and current fluctuation value with the corresponding set thresholds. When any parameter value in the cable parameters is greater than the corresponding set threshold, an abnormal cable operation warning signal is generated and sent to the warning unit. Specifically, when the cable joint temperature rise rate is greater than the preset cable joint temperature rise rate threshold, a cable joint temperature rise abnormal signal is generated; when the discharge signal strength is greater than the preset discharge signal strength threshold, a partial discharge abnormal signal is generated; and when the current fluctuation value is greater than the preset current fluctuation value threshold, an overload abnormal signal is generated. The difference between the internal surface temperature and the ambient temperature is calculated and marked as the internal and external temperature difference value. The internal and external temperature difference value is compared with the preset temperature difference threshold and the internal surface temperature is compared with the set standard temperature. When the internal and external temperature difference value is greater than or equal to the preset temperature difference threshold or the internal surface temperature is greater than or equal to the set standard temperature, a high temperature heat dissipation signal is generated. The difference between the dew point temperature and the surface temperature inside the chamber is calculated and marked as the condensation risk coefficient. The condensation risk coefficient is compared with the preset condensation risk coefficient threshold. When the condensation risk coefficient is greater than or equal to the preset condensation risk coefficient threshold, a condensation dehumidification signal is generated; otherwise, a condensation normal signal is generated. The ambient humidity is compared with the preset standard humidity. When the ambient humidity is greater than the preset standard humidity, an external humidity influence signal is generated.

[0014] Furthermore, when a high-temperature heat dissipation signal and a normal condensation signal are generated, an external circulation heat dissipation execution signal is generated. When a condensation dehumidification signal and an external humidity influence signal are generated, an internal circulation dehumidification execution signal is generated. The external circulation heat dissipation execution signal and the internal circulation dehumidification execution signal are sent to the mode switching execution module.

[0015] Compared with the prior art, the advantages of this invention are: 1. This solution is based on a decision-making mechanism that integrates multi-source sensor information. The system uses real-time detected comprehensive data to determine the state of the cable body and the internal and external environment of the enclosure, enabling real-time anomaly detection and intelligent decision-making. Based on the monitoring of internal and external temperature, humidity, and dew point, the system achieves dual-mode adaptive control by changing the shape of the ventilation openings and cooperating with the drying and dehumidification structure to achieve an effective balance between heat dissipation and dehumidification.

[0016] 2. The drying and dehumidification structure in this solution consists of a dehumidifier and a guide frame. The design of "rectangular guide frame + internal circulation port" is the key to achieving dual-mode switching. When the internal temperature is high and the temperature difference between the inside and outside is large, the internal circulation port is closed to achieve the external circulation heat dissipation and dehumidification mode. This mode introduces fresh air for cooling and dehumidification, preventing the introduction of external moisture. When the external environment is high in humidity, the vent is closed and the internal circulation port is opened, switching to the closed operation condition of the branch box to achieve the internal circulation anti-condensation mode. This mode uses internal air circulation for dehumidification and slightly increases the temperature of the air inside the box, fundamentally preventing condensation inside the box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the structure of the branch box and the air deflector when the present invention is disassembled; Figure 4 This is a schematic diagram of the drying and dehumidification structure of the present invention; Figure 5 This is a schematic diagram showing the split of the drying and dehumidification structure of the present invention; Figure 6 This is a schematic diagram of the structure of the guide frame after the pair of U-shaped sealing plates are driven to the front and rear sides in this invention; Figure 7 This is a schematic diagram of the drying and dehumidification structure of the present invention in the internal circulation dehumidification and anti-condensation mode; Figure 8 This is a schematic diagram of the overall internal structure of the present invention in the external circulation heat dissipation mode; Figure 9 This is a system principle block diagram in Embodiment 2 of the present invention.

[0018] Explanation of the labels in the diagram: Branch box; 101, Ventilation opening; 2, Mounting bracket; 3, Air vane; 4, Drive motor; 5, Dehumidifier; 501, Air inlet; 502, Air outlet; 503, Condensate drain pipe; 6. Flow guide frame; 601. Internal circulation port; 7. U-shaped sealing plate; 701. Moving plate; 702. Guide strip; 8. Bidirectional screw; 9. Rotary motor; 10. Ventilation and protection frame. Detailed Implementation

[0019] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1: This invention discloses an outdoor metal cable branch box based on intelligent monitoring and early warning technology. Please refer to [link / reference]. Figure 1 - Figure 3 It includes a branch box 1, a mounting bracket 2 installed inside the branch box 1 for cable installation, and a control panel for intelligent monitoring and early warning; Multiple ventilation openings 101 are provided on the outer walls of both the left and right ends of the branch box 1, and a wind plate 3 is rotatably installed at each ventilation opening 101. Multiple wind plates 3 located on the same side are driven to rotate synchronously through a linkage mechanism. The upper and lower ends of the wind plate 3 are rounded. The top of the wind plate 3 is rotatably installed inside the ventilation opening 101 through a rotating shaft. The linkage mechanism includes a drive box embedded in the inner wall of the rear side of the branch box 1 and a drive motor 4 installed on the rear wall of the drive box. One end of the rotating shaft passes through the drive box. The drive box is equipped with a transmission wheel-transmission belt transmission assembly for linking multiple rotating shafts and the drive end of the drive motor 4, so as to realize that the ventilation port 101 flips outward synchronously to open the ventilation port 101 for heat dissipation. Both sides of the branch box 1 are fixedly installed with ventilation protection frames 10 located outside the air panel 3. When the air panel 3 is open, the externally installed ventilation protection frames 10 protect the ventilation opening 101 to prevent the ventilation opening 101 from being completely exposed to the outside, thus playing a role in isolation and protection.

[0021] Please see Figure 2 and Figure 8 The branch box 1 has a drying and dehumidification structure fixedly installed inside, located between one set of vents 101 and the mounting bracket 2. It includes a guide frame 6 and a dehumidifier 5 installed sequentially from one side of the vent 101 inward. The guide frame 6 is sealed and connected to one end of the vent 101. The dehumidifier 5 has an air outlet 502 and an air inlet 501 on both the left and right sides. The bottom of the dehumidifier 5 has a condensate drain pipe 503 extending to the outside of the branch box 1. The guide frame 6 has an internal circulation port 601 for connecting the air inlet 501, and the guide frame 6 is equipped with an internal circulation opening and closing mechanism adapted to the internal circulation port 601. Specifically, there are four internal circulation ports 601, which are distributed at the four corners of the guide frame 6. The internal circulation ports 601 are L-shaped. The internal circulation opening and closing mechanism includes two U-shaped sealing plates 7 distributed at the front and rear positions of the guide frame 6. The U-shaped sealing plates 7 are slidably installed in a pair of internal circulation ports 601 distributed vertically on the same side. Guide strips 702 are provided on both the upper and lower ends of the U-shaped sealing plates 7. The inner walls of the upper and lower internal circulation ports 601 are provided with matching grooves to improve the sliding stability of the U-shaped sealing plates 7. A pair of U-shaped sealing plates 7 are each fixedly mounted with a movable plate 701 at their top ends. A bidirectional drive assembly for driving the two movable plates 701 to move is installed at the top inside the branch box 1. The bidirectional drive assembly includes a support frame fixedly mounted at the top inside the branch box 1. A bidirectional screw 8 is rotatably mounted between the bottom of the support frame, passing through the pair of movable plates 701 in sequence. Both ends of the bidirectional screw 8 are provided with external threads that are threaded into the pair of movable plates 701 and set in opposite directions. A rotary motor 9 for rotating the bidirectional screw 8 is fixed on the support frame. The guide frame 6 is used to connect one set of vents 101 with the dehumidifier 5. The vents 101 serve as the air intake channel, and the other set of vents 101 serves as the air outlet channel, so as to realize the airflow inside and outside the branch box 1.

[0022] A guide frame 6 is added between the dehumidifier 5 and the vent 101. The design of "rectangular guide frame + internal circulation port" is the key to realizing dual-mode switching. Under high temperature heat dissipation conditions, the internal circulation port 601 is closed and the vent 101 is opened to realize one-way circulation between the dehumidifier 5 and the vent 101. The fan inside the dehumidifier works, and the airflow is pushed from the outside to the inside with positive pressure to ensure that all airflow comes from the outside. Under high humidity dehumidification conditions, close the vent 101 and open the internal circulation vent 601 to achieve adaptive switching of the air duct. At this time, when the dehumidifier is started, the airflow will naturally switch from the "external circulation" path to the "internal circulation" path. In the internal circulation mode, the dehumidifier will reduce the absolute moisture content of the air in the branch box 1. Meanwhile, during the entire cycle, the heat generated by the hot end of the dehumidifier will slightly increase the temperature of the circulating gas and the surface temperature inside the chamber. This ensures that the surface temperature inside the chamber is always higher than the dew point temperature, fundamentally preventing condensation. In addition, it achieves sealed dehumidification, effectively blocking high-humidity air from the outside. The internal circulation only processes the limited volume of air inside the chamber, without needing to process the humid external fresh air. Therefore, it consumes less power and has higher dehumidification efficiency.

[0023] Example 2: Please refer to Figure 9 The control panel includes a sensor acquisition module, an analysis and decision-making module, a mode switching execution module, and an early warning module. The sensor acquisition module is used to collect comprehensive data composed of parameters inside the box, environmental parameters, and cable parameters. The parameters inside the enclosure include the surface temperature and dew point temperature inside the enclosure; the environmental parameters include the ambient temperature and ambient humidity; and the cable parameters include the cable joint temperature rise rate, the discharge signal strength, and the current fluctuation value during cable operation. The cable joint temperature rise rate represents the temperature change of the cable joint. The discharge signal strength is captured by an ultra-high frequency sensor to capture the intensity of the electromagnetic wave generated by the discharge. The current fluctuation value is the difference between the operating current and the rated current. The comprehensive data is sent to the analysis and decision module. The analysis and decision-making module is used to make intelligent analysis and decisions on the current operating status of the cable branch box based on comprehensive data, and send the analysis and decision-making results to the mode switching execution module and the early warning module. The process of intelligent analysis and decision-making on the current operating status of the cable branch box includes: comparing the cable joint temperature rise rate, discharge signal strength and current fluctuation value with the corresponding set thresholds respectively; when any parameter value in the cable parameters is greater than the corresponding set threshold, an abnormal cable operation warning signal is generated and sent to the warning unit. Specifically, when the temperature rise rate of the cable joint exceeds the preset temperature rise rate threshold of the cable joint, a cable joint temperature rise abnormal signal is generated; when the discharge signal strength exceeds the preset discharge signal strength threshold, a partial discharge abnormal signal is generated; and when the current fluctuation value exceeds the preset current fluctuation value threshold, an overload abnormal signal is generated. The cable joint temperature rise abnormal signal, the partial discharge abnormal signal, and the overload abnormal signal are summarized into a cable abnormal operation early warning signal and sent to the early warning unit for targeted early warning, thereby improving the safety of cable use and the operation level of the power distribution network. The difference between the internal surface temperature and the ambient temperature is calculated and marked as the internal and external temperature difference value. The internal and external temperature difference value is compared with the preset temperature difference threshold and the internal surface temperature is compared with the set standard temperature. When the internal and external temperature difference value is greater than or equal to the preset temperature difference threshold or the internal surface temperature is greater than or equal to the set standard temperature, a high temperature heat dissipation signal is generated. The difference between the dew point temperature and the surface temperature inside the chamber is calculated and marked as the condensation risk coefficient. The condensation risk coefficient is compared with the preset condensation risk coefficient threshold. When the condensation risk coefficient is greater than or equal to the preset condensation risk coefficient threshold, a condensation dehumidification signal is generated; otherwise, a condensation normal signal is generated. The ambient humidity is compared with the preset standard humidity. When the ambient humidity is greater than the preset standard humidity, an external humidity influence signal is generated. When a high-temperature heat dissipation signal and a normal condensation signal are generated, an external circulation heat dissipation execution signal is generated. When a condensation dehumidification signal and an external humidity influence signal are generated, an internal circulation dehumidification execution signal is generated. The abnormal operation warning signal of the cable is sent to the warning module, which then provides intelligent warning. The external circulation heat dissipation execution signal and the internal circulation dehumidification execution signal are sent to the mode switching execution module. The mode switching execution module makes an adaptive switching control between the internal and external heat dissipation and dehumidification modes. Based on data analysis, it decides whether to prioritize "heat dissipation" or "dehumidification and moisture prevention". Specifically, when the external circulation cooling execution signal is received, the external circulation cooling mode is activated. The air vanes 3 on both sides of the branch box 1 are rotated outward through the linkage mechanism to expose the ventilation openings 101, so as to realize the circulation of the left and right ends of the branch box 1 with the outside air. At this time, the dehumidifier is turned on, and the outside air is introduced after being dried by the dehumidifier. After the dry and cold air enters, the high temperature air in the branch box 1 is squeezed out through the ventilation opening 101 on the other side. The two tasks of introducing fresh air for cooling and dehumidifying the fresh air are achieved, thus realizing the external circulation cooling. In this mode, it is necessary to add that, in combination with the internal and external temperature difference and the specific range of the internal surface temperature, the larger the internal and external temperature difference or the higher the internal surface temperature, the larger the opening angle of the vent 101. This opening range mechanism can be set to further improve the heat dissipation efficiency according to actual needs. When the internal circulation dehumidification execution signal is received, the internal circulation dehumidification anti-condensation mode is activated, and the vent 101 is closed. At this time, the branch box 1 is in a closed state. The internal circulation port 601 is opened, and then the dehumidifier is turned on. The humid air in the box is drawn in from the internal circulation ports around the rectangular guide frame, processed by the dehumidifier (condensation dehumidification and slight heating), and the dry air is returned to the box. At the same time, the temperature of the air in the box is slightly increased to ensure that the surface temperature of the equipment is always higher than the dew point temperature, thus fundamentally preventing condensation. The internal circulation only processes the limited volume of air in the box, without having to process a large amount of humid external fresh air. Therefore, the power consumption is lower, the dehumidification efficiency is higher, and the entire cable branch box is ensured to work efficiently, energy-savingly, and reliably.

[0024] In addition, it should be added that the article involves comparisons of various thresholds and preset values. Thresholds, preset values, preset ranges, etc. are set for result comparison and analysis to determine whether they are good or bad. The magnitude of these values ​​is set and stored based on a combination of large-scale model analysis of sample data and human experience. They can also be appropriately adjusted based on seasonal or common-sense influencing factors.

[0025] In summary, the decision-making mechanism is based on multi-source sensor information fusion perception. The system uses real-time detected comprehensive data to determine the state of the cable body and the internal and external environment of the enclosure. It fully combines the multi-dimensional operating parameters of the equipment and the internal and external environmental parameters to provide feedback on the predictability and response speed of fault occurrence, thereby realizing real-time anomaly capture and intelligent decision-making.

[0026] Based on the monitoring of temperature, humidity, and dew point inside and outside the chamber, the system achieves dual-mode adaptive control by changing the opening and closing shape of the vents and cooperating with the drying and dehumidification structure composed of dehumidifier 5 and guide frame 6 to switch between heat dissipation and dehumidification internal and external circulation. This "dual-mode adaptive heat dissipation and dehumidification system" achieves an effective balance between heat dissipation and dehumidification, allowing the dehumidifier to work in the most efficient way under different external environments, effectively solving the dehumidification problem under non-sealed conditions.

[0027] The above description represents only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and improved concepts of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An outdoor metal cable distribution box based on intelligent monitoring and early warning technology, comprising a distribution box (1), a mounting bracket (2) for cable installation, and a control panel, characterized in that: The branch box (1) has multiple ventilation openings (101) on the outer walls of both the left and right ends, which are distributed vertically. Each ventilation opening (101) is rotatably installed with a wind plate (3). Multiple wind plates (3) on the same side are driven to rotate synchronously through a linkage mechanism. Furthermore, ventilation protection frames (10) located outside the wind plates (3) are installed on the outer sides of both the left and right sides of the branch box (1). A drying and dehumidification structure is installed between one set of vents (101) and the mounting bracket (2), which includes a guide frame (6) and a dehumidifier (5) installed together. The guide frame (6) is sealed and connected to one end of the vent (101). The left and right ends of the dehumidifier (5) are the air outlet (502) and the air inlet (501). An internal circulation port (601) for connecting the air inlet (501) is provided on the guide frame (6), and an internal circulation opening and closing mechanism adapted to the internal circulation port (601) is installed on the guide frame (6). The internal circulation port (601) is provided with four ports and is distributed at the four corners of the guide frame (6), and the internal circulation port (601) has an L-shaped structure; The internal circulation opening and closing mechanism includes two U-shaped sealing plates (7) distributed in front and behind the flow guide frame (6). The U-shaped sealing plates (7) are slidably installed in a pair of internal circulation ports (601) distributed vertically. Each pair of U-shaped sealing plates (7) has a movable plate (701) fixed at its top. The top of the branch box (1) is equipped with a bidirectional drive assembly for driving the two movable plates (701) to move. The control panel includes a sensor acquisition module, an analysis and decision-making module, a mode switching execution module, and an early warning module. The sensor acquisition module is used to collect comprehensive data composed of parameters inside the box, environmental parameters, and cable parameters, and sends the comprehensive data to the analysis and decision-making module. The analysis and decision-making module analyzes and makes decisions on the operating status of the cable branch box based on the comprehensive data, and sends the analysis and decision-making results to the mode switching execution module and the early warning module. The early warning module issues an early warning, and the mode switching execution module makes a switching control between heat dissipation and dehumidification modes.

2. The outdoor metal cable branch box based on intelligent monitoring and early warning technology according to claim 1, characterized in that: The top of the air plate (3) is rotatably mounted inside the top of the ventilation opening (101) via a rotating shaft. The linkage mechanism includes a drive box embedded in the inner wall of the rear side of the branch box (1) and a drive motor (4) mounted on the rear wall of the drive box. The drive box is equipped with a transmission wheel-transmission belt transmission assembly for linking multiple rotating shafts and the drive end of the drive motor (4).

3. The outdoor metal cable branch box based on intelligent monitoring and early warning technology according to claim 1, characterized in that: The bidirectional drive assembly includes a support frame fixed to the top of the branch box (1), and a bidirectional screw (8) rotatably mounted between the bottom of the support frame and threadedly connected to a pair of movable plates (701). Both ends of the bidirectional screw (8) are provided with reversed external threads. A rotary motor (9) for rotating the bidirectional screw (8) is fixed on the support frame.

4. The outdoor metal cable branch box based on intelligent monitoring and early warning technology according to claim 1, characterized in that: The parameters inside the enclosure include the surface temperature and dew point temperature inside the enclosure; the environmental parameters include the ambient temperature and ambient humidity; and the cable parameters include the temperature rise rate of the cable joint, the discharge signal strength, and the current fluctuation value during cable operation, wherein the current fluctuation value is the difference between the operating current and the rated current.

5. The outdoor metal cable branch box based on intelligent monitoring and early warning technology according to claim 4, characterized in that: The process of intelligent analysis and decision-making on the current operating status of the cable branch box includes: comparing the cable joint temperature rise rate, discharge signal strength and current fluctuation value with the corresponding set thresholds respectively; when any parameter value in the cable parameters is greater than the corresponding set threshold, an abnormal cable operation warning signal is generated and sent to the warning unit. The difference between the internal surface temperature and the ambient temperature is calculated and marked as the internal and external temperature difference value. The internal and external temperature difference value is compared with the preset temperature difference threshold and the internal surface temperature is compared with the set standard temperature. When the internal and external temperature difference value is greater than or equal to the preset temperature difference threshold or the internal surface temperature is greater than or equal to the set standard temperature, a high temperature heat dissipation signal is generated. The difference between the dew point temperature and the surface temperature inside the chamber is calculated and marked as the condensation risk coefficient. The condensation risk coefficient is compared with the preset condensation risk coefficient threshold. When the condensation risk coefficient is greater than or equal to the preset condensation risk coefficient threshold, a condensation dehumidification signal is generated; otherwise, a condensation normal signal is generated. The ambient humidity is compared with the preset standard humidity. When the ambient humidity is greater than the preset standard humidity, an external humidity influence signal is generated.

6. The outdoor metal cable branch box based on intelligent monitoring and early warning technology according to claim 5, characterized in that: When a high-temperature heat dissipation signal and a normal condensation signal are generated, an external circulation heat dissipation execution signal is generated. When a condensation dehumidification signal and an external humidity influence signal are generated, an internal circulation dehumidification execution signal is generated. The external circulation heat dissipation execution signal and the internal circulation dehumidification execution signal are sent to the mode switching execution module.

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