Outdoor low-voltage distribution box multi-location high temperature dynamic early warning device

Abstract

This utility model discloses a multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes. With larger dimensions, the box can be expanded into a cabinet, including a protective outer shell. A cabinet door is hinged to the surface of the protective shell, and a main control module is installed on the surface of the cabinet door. The main control module is used to collect data and record it. This utility model constructs a complete multi-location monitoring unit inside the cabinet by setting sensors at multiple key locations such as busbars, circuit breakers, cable joints, capacitor rooms, reactor rooms, and ventilation openings, achieving comprehensive temperature monitoring of various important areas inside the distribution box. Through the three-level protection logic executed by the main control module, the absolute over-temperature alarm threshold is set by combining the cabinet temperature with the real-time outdoor temperature. Simultaneously, considering the temperature rise rate and comparison with past data, the warning standard is dynamically adjusted according to the actual environment, which can more accurately reflect the true temperature condition inside the distribution box and effectively avoid false alarms caused by environmental temperature fluctuations.

Description

Technical Field

[0001] This utility model relates to the field of distribution box technology, specifically to a multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes. Background Technology

[0002] Distribution boxes are classified into power distribution boxes and lighting distribution boxes according to their functional characteristics. They are the final stage equipment of the power distribution system and are cabinet devices used to centrally install electrical equipment such as switches, circuit breakers, fuses, and instruments.

[0003] For high-risk outdoor fire scenarios, such as forests, adjacent flammable sites, and flammable material storage areas, there will be monitoring blind spots when using distribution boxes, and a single sensor cannot cover key heat points; low-voltage distribution boxes have poor environmental adaptability, outdoor boxes face greater temperature changes than indoor boxes, and the safe temperature inside the box needs to change dynamically with the environment, and fixed threshold schemes are prone to false alarms; the response is lagging, the rate of temperature rise is not monitored, and it is impossible to warn of sudden overheating (such as arc faults).

[0004] In light of this, we have launched a multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes. Utility Model Content

[0005] The purpose of this invention is to provide a multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes, comprising:

[0007] A protective shell, the surface of which is hinged with a cabinet door, the surface of which is provided with a main control module, which is used to collect data so that the collected data is recorded;

[0008] Busbar, the busbar is disposed inside a protective enclosure, and a circuit breaker is installed inside the protective enclosure;

[0009] The busbar and the circuit breaker are respectively provided with multi-position monitoring units. The busbar sensor 3a and the circuit breaker terminal sensor 3b of the multi-position monitoring units are used in conjunction to monitor the working status of the busbar and the circuit breaker.

[0010] Preferably, the multi-position monitoring unit further includes a cable connector connected to the bottom of the circuit breaker. A cable connector sensor 3c for monitoring is connected to the surface of the cable connector. The busbar sensor 3a is connected to the surface of the busbar, and the circuit breaker terminal sensor 3b is connected to the surface of the circuit breaker. As the connection component between the circuit breaker and the external cable, the quality of the contact of the cable connector directly affects the stability and safety of power transmission. The cable connector sensor 3c is fixed to the surface of the cable connector by magnetic attraction or snap-fit, and can monitor the temperature anomalies caused by abnormal outdoor environment, overload, etc. in real time. The busbar sensor 3a and the circuit breaker terminal sensor 3b are respectively installed in corresponding positions by dedicated fixing brackets to ensure that the sensor is in close contact with the measured component and improve the accuracy of temperature monitoring.

[0011] Preferably, the main control module includes an embedded microcontroller and a data storage device. The embedded microcontroller, as the core component of the main control module, adopts a high-performance ARM chip or other dedicated control chip, and has powerful data processing capabilities and logic control functions. It can receive temperature data transmitted from various sensors in real time and analyze and judge according to the preset three-level early warning logic. The data storage device adopts a non-volatile memory chip, which can save at least one hour of historical temperature data, making it convenient for staff to query historical operating status, analyze temperature change trends, and provide data support for equipment maintenance and fault diagnosis.

[0012] Preferably, one end of the main control module is connected to an alarm unit for issuing alarms. The alarm unit is connected to the main control module via a signal line. When the main control module determines, based on temperature data, that there is overheating, abnormal temperature rise rate, or excessive temperature difference compared with historical data in the distribution box, it will immediately send an alarm signal to the alarm unit. The alarm unit integrates audible and visual alarm functions. The buzzer can emit a loud alarm sound, and the LED indicator will flash different colors of light (such as red to indicate an emergency overheating). It will also alert nearby staff to the abnormal situation of the distribution box through SMS, telephone, and other means.

[0013] Preferably, a single-bus temperature sensor for monitoring temperature is connected to the top of the protective housing. A radiation shield is connected to the outer surface of the single-bus temperature sensor on the top of the protective housing. The single-bus temperature sensor adopts digital temperature sensing technology and communicates with the main control module through a single signal line. It has the characteristics of strong anti-interference ability and high measurement accuracy. It is installed in the center of the top of the protective housing and can collect the outdoor ambient temperature in real time. The radiation shield is made of aluminum alloy or stainless steel and is dome-shaped, covering the outside of the single-bus temperature sensor. Its unique structural design can effectively block the interference of external factors such as direct sunlight, rain and snow on the sensor, ensuring the accuracy of outdoor temperature data and providing a reliable ambient temperature reference for cabinet temperature early warning.

[0014] Preferably, the interior of the protective housing may also include a capacitor chamber, a reactor chamber, and a vent, with a capacitor chamber sensor 3d connected inside the capacitor chamber, a reactor chamber sensor 3e connected inside the reactor chamber, and a vent sensor 3f connected inside the vent.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) By setting sensors at multiple key locations such as busbars, circuit breakers, cable joints, capacitor rooms, reactor rooms and ventilation openings, a complete multi-location monitoring unit inside the cabinet was constructed, realizing all-round temperature monitoring of various important areas inside the distribution box, greatly reducing the missed detection rate and ensuring that potential high temperature hazards can be detected in time.

[0017] (2) In the three-level protection logic executed by the main control module, the absolute over-temperature alarm threshold is set by combining the temperature inside the cabinet with the real-time outdoor temperature. At the same time, the temperature rise rate and the comparison with past data are considered. The warning standard is dynamically adjusted according to the actual environment. This dynamic threshold setting method can more accurately reflect the real temperature inside the distribution box, effectively avoid false alarms caused by environmental temperature fluctuations, and improve the accuracy and reliability of the warning. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the sensor installation of this utility model;

[0019] Figure 2 This is a block diagram of the system structure of this utility model;

[0020] Figure 3 This is a flowchart of the three-level protection logic of this utility model.

[0021] In the diagram: 1. Protective housing; 2. Main control module; 21. Data storage; 22. Microcontroller; 3. Multi-position monitoring unit; 3a. Busbar sensor; 3b. Circuit breaker terminal sensor; 3c. Cable joint sensor; 3d. Capacitor compartment sensor; 3e. Reactor compartment sensor; 3f. Ventilation outlet sensor; 4. Radiation shield; 5. Alarm unit; 6. Single-bus temperature sensor; 7. Circuit breaker; 8. Cable joint; 9. Busbar; 10. Cabinet door. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example

[0024] Please see Figure 1-3 This utility model provides a technical solution: a multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes, comprising: a protective shell 1, a cabinet door 10 hinged to the surface of the protective shell 1, and a main control module 2 disposed on the surface of the cabinet door 10. The main control module 2 is used to collect data so that the collected data is recorded. The cabinet door 10 is hinged to the protective shell 1 by a hinge, which facilitates the opening of the cabinet door for equipment inspection and maintenance by the staff. The main control module 2 is installed on the surface of the cabinet door 10. Its built-in data acquisition circuit can receive temperature signals transmitted by various sensors in real time, and perform analog-to-digital conversion and preliminary processing of the signals through internal data processing logic to ensure that the collected data can be accurately recorded and stored, providing reliable data support for subsequent temperature analysis and early warning.

[0025] Busbar 9 is located inside the protective enclosure 1. A circuit breaker 7 is installed inside the protective enclosure 1. As an important power transmission component in the distribution box, busbar 9 is made of materials with good conductivity such as copper or aluminum and is used to collect, distribute and transmit electrical energy. The circuit breaker 7 is installed near busbar 9 and is a key protection device in the distribution box. When an overload, short circuit or other abnormal situation occurs in the circuit, it can automatically cut off the circuit and protect the power equipment. The two form a complete power transmission and control unit inside the protective enclosure 1.

[0026] The busbar 9 and the circuit breaker 7 are respectively provided with multi-position monitoring units 3. The busbar sensor 3a and the circuit breaker terminal sensor 3b of the multi-position monitoring unit 3 are used in conjunction to monitor the working status of the busbar 9 and the circuit breaker 7.

[0027] The multi-position monitoring unit 3 also includes a cable connector 8 connected to the bottom of the circuit breaker 7. A cable connector sensor 3c for monitoring is connected to the surface of the cable connector 8. The busbar sensor 3a is connected to the surface of the busbar 9, and the circuit breaker terminal sensor 3b is connected to the surface of the circuit breaker 7. The cable connector 8 serves as the connection component between the circuit breaker 7 and the external cable. The quality of its contact directly affects the stability and safety of power transmission. The cable connector sensor 3c is fixed to the surface of the cable connector 8 by magnetic attraction or snap-fit, and can monitor the temperature abnormalities caused by poor contact, overload, etc. in real time. The busbar sensor 3a and the circuit breaker terminal sensor 3b are respectively installed in corresponding positions by dedicated fixing brackets to ensure that the sensors are in close contact with the measured components and improve the accuracy of temperature monitoring.

[0028] The main control module 2 includes an embedded microcontroller 22 and a data storage 21. The embedded microcontroller 22, as the core component of the main control module 2, adopts a high-performance ARM chip or other dedicated control chip, and has powerful data processing capabilities and logic control functions. It can receive temperature data transmitted from various sensors in real time and analyze and judge according to the preset three-level early warning logic. The data storage 21 adopts a non-volatile storage chip, which can save at least 72 hours of historical temperature data, making it convenient for staff to query historical operating status, analyze temperature change trends, and provide data support for equipment maintenance and fault diagnosis.

[0029] One end of the main control module 2 is connected to an alarm unit 5 for issuing alarms. The alarm unit 5 is connected to the main control module 2 via a signal line. When the main control module 2 determines, based on temperature data, that there is an overheating, abnormal temperature rise rate, or excessive temperature difference compared with historical data in the distribution box, it will immediately send an alarm signal to the alarm unit 5. The alarm unit 5 integrates audible and visual alarm functions. The buzzer can emit a loud alarm sound, and the LED indicator will flash different colors of light (such as red to indicate an emergency overheating), alerting nearby staff to the abnormal situation of the distribution box in multiple ways.

[0030] The top of the protective housing 1 is connected to a single-bus temperature sensor 6 for monitoring temperature. A radiation shield 4 is connected to the outer surface of the single-bus temperature sensor 6 on the top of the protective housing 1. The single-bus temperature sensor 6 adopts digital temperature sensing technology and communicates with the main control module 2 through a single signal line. It has the characteristics of strong anti-interference ability and high measurement accuracy. It is installed in the center of the top of the protective housing 1 and can collect the outdoor ambient temperature in real time. The radiation shield 4 is made of aluminum alloy or stainless steel and is dome-shaped, covering the outside of the single-bus temperature sensor 6. Its unique structural design can effectively block the interference of external factors such as direct sunlight, rain and snow on the sensor, ensuring the accuracy of outdoor temperature data and providing a reliable ambient temperature reference for cabinet temperature early warning.

[0031] Specifically, in use, the external environment monitoring unit (i.e., data storage 21 and microcontroller 22), the multi-position monitoring unit 3 inside the cabinet, the main control module 2, and the alarm unit 5 work together to achieve dynamic monitoring and early warning of high temperature in the distribution box. Its specific workflow is as follows:

[0032] External environment monitoring: The single-bus temperature sensor 6 installed on the top of the protective housing 1 continuously monitors the outdoor ambient temperature under the protection of the radiation shield 4. The radiation shield 4 can effectively block the interference of factors such as solar radiation on temperature measurement, ensuring that accurate outdoor temperature data is obtained and transmitted to the main control module 2.

[0033] Multi-location monitoring inside the cabinet: The multi-location monitoring unit 3 inside the cabinet plays a key role. Among them, the busbar sensor 3a, the circuit breaker terminal sensor 3b, and the cable joint sensor 3c are respectively installed on the surface of the busbar 9, the circuit breaker 7, and the cable joint 8, and are installed in corresponding areas. These sensors collect temperature data of various key parts in the distribution box in real time, such as the heat generation of equipment such as the busbar 9 and the circuit breaker 7 during operation, and transmit the data synchronously to the main control module 2.

[0034] After receiving temperature data from sensors inside and outside the cabinet, the main control module 2 processes and analyzes the data using its internal embedded microcontroller 22 and data storage 21. For absolute over-temperature judgment: the main control module 2 compares the temperature collected by each sensor inside the cabinet with the real-time outdoor temperature. If the temperature of any sensor inside the cabinet is greater than the real-time outdoor temperature plus 40°C, satisfying the condition "any measuring point inside the cabinet > real-time outdoor temperature + 40°C", the main control module 2 determines that an absolute over-temperature situation has occurred. For temperature rise rate judgment: the main control module 2 continuously collects temperature data inside the cabinet at certain time intervals (e.g., every 2 minutes) and calculates... The temperature rise rate within adjacent time intervals is monitored. When the temperature rise rate inside the cabinet exceeds 0.5℃ per minute, which is considered "temperature rise rate > 0.5℃ / min", the main control module 2 will determine that the temperature rise rate is abnormal. A comparison with past data is also performed: the data storage 21 stores temperature data records of the distribution box at similar times in the past (e.g., under the same outdoor temperature conditions). The main control module 2 compares and analyzes the currently collected cabinet temperature data with historical data under the same operating conditions. If the temperature difference exceeds 5℃, which meets the condition of "temperature difference greater than 5℃ compared with similar times in the past", the main control module 2 will determine that there is an abnormal temperature change.

[0035] Once the main control module 2 determines that there is a high temperature risk in the distribution box based on any of the three judgment conditions mentioned above, it will immediately send a control signal to the alarm unit 5. After receiving the signal, the alarm unit 5 will issue an alarm through sound, light, etc., to remind the staff to check and deal with the distribution box in time. At the same time, the main control module 2 will store the current temperature data and the relevant information of the alarm trigger in the data storage 21 for subsequent data analysis and fault diagnosis. Example

[0036] Please see Figure 2 This utility model provides a technical solution that is basically the same as that in Embodiment 1, with the following slight differences:

[0037] The protective housing 1 also includes a capacitor chamber, a reactor chamber, and a vent. The capacitor chamber is connected to a capacitor chamber sensor 3d, the reactor chamber is connected to a reactor chamber sensor 3e, and the vent is connected to a vent sensor 3f.

[0038] The capacitor compartment is used to install compensation capacitors, and the reactor compartment is used to install filter reactors. In the power system, they respectively play the roles of improving the power factor and suppressing harmonics. The capacitor compartment sensor 3d and the reactor compartment sensor 3e are installed near the key heat-generating components in their respective compartments to monitor the operating temperature of these devices in real time. The vents are located on the side or top of the protective housing 1 to promote air circulation inside the cabinet. The vent sensor 3f is installed inside the vent and can monitor the air temperature and flow rate at the vent. When the vent is blocked by dust or the fan fails, resulting in poor ventilation, the sensor can detect the temperature abnormality in time, providing a basis for the main control module 2 to judge the heat dissipation status inside the cabinet and ensuring that all components in the distribution box operate in a suitable temperature environment.

[0039] The capacitor room sensor 3d, reactor room sensor 3e, and vent sensor 3f are installed in the capacitor room, reactor room, and vent respectively to monitor the temperature of the capacitor room, reactor room, and vent, and transmit the data synchronously to the main control module 2.

[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-location high-temperature dynamic early warning device for outdoor low-voltage distribution boxes, characterized in that, include: A protective shell (1) is provided with a cabinet door (10) hinged to its surface. A main control module (2) is provided on the surface of the cabinet door (10), and the main control module (2) is used to collect data so that the collected data is recorded. Busbar (9) is disposed inside the protective enclosure (1), and a circuit breaker (7) is disposed inside the protective enclosure (1). The busbar (9) and the circuit breaker (7) are respectively provided with multi-position monitoring units (3). The busbar sensor (3a) and the circuit breaker terminal sensor (3b) of the multi-position monitoring unit (3) are used in conjunction to monitor the working status of the busbar (9) and the circuit breaker (7).

2. The outdoor low-voltage distribution box multi-location high-temperature dynamic early warning device according to claim 1, characterized in that, The multi-position monitoring unit (3) also includes a cable connector (8) connected to the bottom of the circuit breaker (7), a cable connector sensor (3c) for monitoring is connected to the surface of the cable connector (8), the busbar sensor (3a) is connected to the surface of the busbar (9), and the circuit breaker terminal sensor (3b) is connected to the surface of the circuit breaker (7).

3. The outdoor low-voltage distribution box multi-location high-temperature dynamic early warning device according to claim 1, characterized in that, The main control module (2) includes an embedded microcontroller (22) and a data storage device (21).

4. The outdoor low-voltage distribution box multi-location high-temperature dynamic early warning device according to claim 1, characterized in that, One end of the main control module (2) is connected to an alarm unit (5) for issuing alarms.

5. The outdoor low-voltage distribution box multi-location high-temperature dynamic early warning device according to claim 1, characterized in that, The top of the protective housing (1) is connected to a single-bus temperature sensor (6) for monitoring temperature, and the top of the protective housing (1) is connected to a radiation shield (4) on the outer surface of the single-bus temperature sensor (6).

6. The outdoor low-voltage distribution box multi-location high-temperature dynamic early warning device according to claim 1, characterized in that, The interior of the protective housing (1) may also include a capacitor chamber, a reactor chamber and a vent, and the capacitor chamber is connected to a capacitor chamber sensor (3d), the reactor chamber is connected to a reactor chamber sensor (3e), and the vent is connected to a vent sensor (3f).

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