Circuit breaker

Abstract

The utility model discloses a circuit breaker. The circuit breaker comprises a plurality of mechanism cases, each mechanism case is used for accommodating one phase of the circuit breaker, one mechanism case is arranged for each phase of the circuit breaker, each mechanism case comprises an integrated gas state monitoring unit for monitoring the state of SF6 gas in the mechanism case, and the integrated gas state monitoring unit integrates an SF6 density meter and a sensor. The integrated gas state monitoring unit further comprises a signal output end, the SF6 density meter monitors the SF6 gas state of the corresponding mechanism box and generates an analog signal representing the SF66 gas state, the sensor converts the analog signal into a digital signal representing the SF6 gas state monitoring result, and the signal output end outputs the digital signal; and the control box comprises a plurality of receiving ports, each receiving port is connected with one of the signal output ends through a gathering cable, and the control box receives the digital signals through the gathering cable. The circuit breaker saves a lot of field design problems and construction cost problems, and is convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment state monitoring technical field especially relates to a SF6 circuit breaker. BACKGROUND

[0002] SF6 circuit breaker has wide application in power system, with the basic completion of circuit breaker oilless reforming work, 110KV and above grade circuit breaker all adopt SF6 gas as high voltage circuit breaker insulation and arc extinguishing medium. SF6 gas mainly acts as insulation and arc extinguishing medium in circuit breaker, once SF6 gas leaks, serious time can cause circuit breaker insulation breakdown explosion and other dangers, is extremely great to power system safe operation harm. Therefore, SF6 equipment gas monitoring becomes the key problem of routine maintenance. SF6 gas-filled power equipment is the key equipment of power grid operation, the reliable operation of this kind of equipment has become one of the cores that the electric power industry pays attention to. The traditional SF6 gas-filled power equipment is filled by SF6 gas, in recent years, SF6 mixed gas is applied in large quantities, and the SF6 gas-filled equipment internal gas quality monitoring becomes more complex. SF6 density relay is used to monitor the core equipment of SF6 gas-filled equipment internal gas density and pressure change, and the performance directly relates to whether the SF6 gas-filled equipment can operate safely and stably.

[0003] The conventional SF6 sensor design is to provide one density meter and sensor for each phase mechanism box, and the signal is connected to the control cabinet in the control room through the cable of each phase, so that the on-site workload is large, the construction is troublesome, many contents need to be considered, and the additional construction cost is expensive. UTILITY MODEL CONTENT

[0004] The present application aims to solve at least one of the technical problems in the related art to some extent.

[0005] According to one aspect of the utility model, provide a circuit breaker, adopt SF6 gas as insulating and arc extinguishing medium, its characterized in be, the circuit breaker includes: multiple mechanism box, every mechanism box set up in the inside of circuit breaker, every mechanism box is used to accommodate one phase of circuit breaker, set up one mechanism box for every phase of circuit breaker, wherein, every mechanism box includes monitoring the state of corresponding mechanism box in the SF6 gas integrated gas state monitoring unit, SF6 density table and sensor are integrated in the integrated gas state monitoring unit, and the integrated gas state monitoring unit still includes signal output end, SF6 density table is used to monitor the state of corresponding mechanism box's SF6 gas and generates analog signal indicating the state of SF6 gas, sensor converts the analog signal into digital signal indicating the state monitoring result of SF6 gas, signal output end exports the digital signal;Control box, control box sets up in the inside of circuit breaker, the control box includes multiple receiving ports, every receiving port is connected with one of signal output ends through the cable of gathering, and the control box receives the digital signal through the cable of gathering.

[0006] Preferably, the control box further includes a plurality of output ports, each output port being connected to one of the receiving ports, the plurality of output ports being configured to externally connect user devices to output the digital signals received by the corresponding receiving ports.

[0007] Preferably, the SF6 density table is configured to monitor at least one of the pressure and the density of the SF6 gas in the corresponding mechanism box.

[0008] Preferably, at least one of the plurality of input ports and the plurality of output ports is in the form of a plug connector.

[0009] Preferably, the cable of gathering is a multi-core cable capable of simultaneously transmitting signals of the plurality of mechanism boxes.

[0010] Preferably, the control box includes a signal processing module configured to perform real-time analysis on the signals from each of the mechanism boxes to identify abnormal SF6 gas states of the mechanism boxes and trigger a warning or a control instruction.

[0011] Preferably, the control box includes a data storage module configured to store historical monitoring data of the signals of each of the mechanism boxes.

[0012] Preferably, the integrated gas state monitoring unit includes a temperature compensation module configured to automatically correct the monitoring results according to changes in the ambient temperature to ensure the accuracy of the monitoring results under different temperature conditions.

[0013] The technical scheme of the utility model realizes the following technical effects:

[0014] 1. SF6 density gauge and sensor are integrated, and use is more convenient.

[0015] 2. The SF6 sensor signal of each mechanism box is first collected in the local control box through the collection cable and plug, and then used by the customer.

[0016] 3. The problems of a large number of design and construction costs on site are saved, and use is convenient and easy. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the utility model and form part of the present application, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute undue limitation on the utility model. In the drawings:

[0018] Figure 1 It is a schematic block diagram showing a conventional SF6 circuit breaker.

[0019] Figure 2 It is a schematic block diagram showing an SF6 circuit breaker according to an embodiment of the utility model.

[0020] Figure 3 It is a schematic block diagram showing the connection between a conventional SF6 circuit breaker and a customer device.

[0021] Figure 4 It is a schematic block diagram showing the connection between an SF6 circuit breaker according to an embodiment of the utility model and a customer device.

[0022] LIST OF REFERENCE NUMERALS:

[0023] 102, 104, 106, 202, 204, 206: mechanism box

[0024] 1022, 1042, 1062: sensor

[0025] 2022, 2042, 2062: integrated gas state monitoring unit

[0026] 2026, 2046, 2066: collection cable

[0027] 1024, 1044, 1064: SF6 density gauge

[0028] 1026, 1046, 1066: cable

[0029] 208: control box

[0030] 208-1, 208-2, 208-3: input port

[0031] 208-4, 208-5, 208-6: Output ports DETAILED DESCRIPTION

[0032] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] SF6 (sulfur hexafluoride) gas is an important insulating and arc-extinguishing medium and is widely used in the power industry, especially in high-voltage switchgear. The state of SF6 gas mainly includes the following aspects:

[0035] Pressure: SF6 gas primarily exists in high-voltage electrical equipment at a pressure higher than atmospheric pressure to provide adequate insulation. During equipment operation, the pressure of SF6 gas is affected by temperature fluctuations, so a pressure monitoring device is required to ensure that the gas pressure remains within a safe range.

[0036] Density: The density of SF6 gas is a key indicator of its insulation performance. The density of SF6 gas varies under different temperature and pressure conditions. To ensure effective insulation, it is necessary to monitor the gas density and maintain density stability through temperature compensation and other means.

[0037] Purity: The purity of SF6 gas has a direct impact on the performance and lifespan of electrical equipment. During operation, SF6 gas may mix with air, moisture, or other impurities, reducing its insulation and arc-extinguishing properties. Therefore, SF6 gas purity must be regularly tested to ensure it meets operating requirements.

[0038] Moisture Condition: The moisture content in SF6 gas has a negative impact on its performance. Moisture can cause SF6 gas to produce acidic substances, corroding metal components inside the equipment, while moisture also reduces the insulation performance of the gas. Therefore, it is necessary to regularly detect the humidity of the gas and take measures to control it within the allowed range.

[0039] Leakage Condition: The leakage of SF6 gas not only can cause the performance of the equipment to decline, but also has potential impact on the environment due to the greenhouse effect of SF6 gas. It is necessary to use gas leakage detection equipment to check regularly to ensure that the SF6 gas in the electrical equipment is well sealed.

[0040] Decomposition Product Condition: In high-voltage electrical equipment, SF6 gas may decompose under the action of electric arc to produce toxic by-products. These decomposition products (such as sulfur fluoride, fluorinated sulfurous acid, etc.) have an impact on the running state of the equipment and the safety of maintenance personnel, so it is necessary to monitor the concentration of these decomposition products.

[0041] By monitoring and controlling these conditions of SF6 gas, the safe operation of electrical equipment can be ensured, while reducing the impact on the environment.

[0042] 1. One aspect of the present application provides an SF6 gas monitoring system, including an integrated device that combines SF6 density meters with sensors for monitoring the state of SF6 gas in electrical equipment; a summary device including a summary cable and a plug device for summarizing SF6 sensor signals in a three-phase independent mechanism box; a local control box connected to the summary device, receiving and processing signals from sensors in the integrated device, and transmitting processed data to the main control room. This design not only simplifies the maintenance process of electrical equipment, but also improves the accuracy and response speed of SF6 gas monitoring, and is suitable for various high-voltage electrical equipment such as GIS (gas insulated switchgear), circuit breakers, etc., to ensure its safe and stable operation.

[0043] 2. Further, the integrated device adopts a modular design, making it easy to install and maintain SF6 density meters and sensors. This modular design greatly facilitates the operation of field engineers, reduces equipment downtime caused by improper maintenance, especially in remote areas or high-altitude work environments, where this advantage is more pronounced.

[0044] 3. Further, the number of SF6 sensors in the integrated device can be adjusted according to the specific needs of electrical equipment to meet the monitoring requirements of different voltage levels. This flexibility allows the system to adapt to a wide range of electrical equipment from low voltage to ultra-high voltage, ensuring comprehensive and targeted monitoring, and improving the overall safety of the power system.

[0045] 4. Furthermore, the aggregation cable of the aggregation device adopts a multi-core cable, which can simultaneously transmit signals of multiple sensors, improving the efficiency of signal transmission. The application of multi-core cable reduces the wiring complexity and cost of the cable, especially in large power facilities, which can significantly reduce the construction difficulty and maintenance cost.

[0046] 5. Furthermore, the plug device adopts a dustproof and waterproof design to ensure the quality of signal connection in harsh environments. This design is particularly important for outdoor power equipment, effectively preventing the influence of external factors such as rain and dust on signal transmission, ensuring the accuracy of data and the long-term stability of the system.

[0047] 6. Furthermore, the local control box is equipped with a data processing module, which can analyze the SF6 gas state in real time and warn of abnormal conditions. The real-time analysis function of the data processing module enables the system to respond to abnormal changes in SF6 gas in a timely manner, providing early warning and avoiding faults caused by gas leakage or pressure abnormalities in power equipment, ensuring the continuous operation of the power grid.

[0048] 7. One aspect of the present application provides a method for monitoring the state of SF6 gas in power equipment, including integrating SF6 density tables and sensors in power equipment; aggregating SF6 sensor signals in three-phase independent mechanism boxes through aggregation devices; and transmitting data to the main control room by the local control box receiving and processing sensor signals. This method is not only suitable for newly built power equipment, but also facilitates the upgrading of existing equipment, improving its intelligent management level.

[0049] 8. Furthermore, in the integrated device, modular design is used to achieve quick replacement and maintenance of SF6 density tables and sensors. This design is crucial for the long-term operation of power equipment, especially in emergency situations, allowing for quick replacement of faulty components, reducing downtime, and ensuring the continuity of power supply.

[0050] 9. Furthermore, according to the voltage level of the power equipment, the specific number of sensors and density tables in each phase mechanism box is corrected to optimize the monitoring effect. By reasonably configuring the number of sensors, not only can the monitoring needs of power equipment of different voltage levels be met, but also resource waste can be avoided, maximizing cost-effectiveness.

[0051] 10. Furthermore, through the multi-core aggregation cable, the signals of multiple sensors are simultaneously transmitted, improving the efficiency of signal aggregation. This efficient data transmission method is particularly important for the operation monitoring of large power facilities, ensuring the timely collection and analysis of all key data and improving the overall monitoring efficiency of the power system.

[0052] 11. Furthermore, the plug device adopts a dustproof and waterproof design to ensure the quality of signal connection in harsh environments. This design is crucial for the long-term stable operation of power equipment, especially in extreme weather conditions, effectively protecting signal transmission lines from data loss or system failure caused by environmental factors.

[0053] 12. Furthermore, the data processing module built-in local control box analyzes the SF6 gas state in real time and warns of abnormal conditions. This real-time monitoring and warning mechanism is crucial for the safe operation of power equipment, allowing immediate action when the gas state is abnormal, preventing major accidents and ensuring personnel and equipment safety.

[0054] 13. One aspect of the present application provides an electronic device for implementing the above-mentioned SF6 gas monitoring system, including a processor for receiving and processing sensor signals, a memory for storing processed data, and a communication module for transmitting data to the main control room. The integrated design of this electronic device not only simplifies the system architecture, but also improves the efficiency of data processing and transmission, suitable for various sizes of power facilities, providing strong technical support for the intelligent management of power equipment.

[0055] 14. Furthermore, the processor adopts a multi-core architecture, capable of parallel processing of multiple sensor signals, improving data processing speed. The application of multi-core processors enables the system to process large amounts of data simultaneously, improving the response speed and processing capacity of the monitoring system, especially in high-load power facilities, ensuring real-time and accuracy of data.

[0056] 15. Furthermore, the memory uses solid-state hard drives to ensure data storage stability and fast access. The use of solid-state hard drives not only improves data storage speed, but also enhances data security, which is of great significance for long-term operation monitoring and data analysis of power equipment, providing reliable data support for maintenance and optimization of power facilities.

[0057] 16. Furthermore, the communication module supports wireless transmission, enabling data transmission to the main control room without wiring. The application of wireless communication technology greatly simplifies the wiring work of power facilities, reducing construction costs and maintenance difficulties. Especially when upgrading existing facilities, it can avoid large-scale wiring engineering, improving construction efficiency.

[0058] 17. An aspect of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the SF6 gas state monitoring method described above. The use of such a storage medium enables the SF6 gas monitoring system to be quickly deployed and updated, adapting to the changing power equipment, and providing a flexible solution for the intelligent upgrading of the power system.

[0059] 18. An aspect of the present application provides a computer program product comprising a computer program that, when executed by a processor, implements the SF6 gas state monitoring method described above, as well as the data processing and transmission functions of the electronic device described above. Such a computer program product not only enables accurate monitoring of the state of SF6 gas, but also optimizes the data processing and transmission process, improving the intelligent management level of power equipment, and providing strong technical support for the digital transformation of the power industry.

[0060] 19. The SF6 gas monitoring system, method and device thereof significantly improve the accuracy and efficiency of monitoring through integrated design and modular installation. The use of multi-core cables and dustproof and waterproof plug devices enhances the stability of the system and its ability to adapt to harsh environments. The built-in data processing module and wireless communication technology enable real-time monitoring and abnormal early warning of the state of SF6 gas, providing a strong guarantee for the safe operation of power equipment. In addition, the system is easy to maintain and expand, and can be flexibly corrected according to the specific needs of power equipment, greatly improving the reliability and economy of the power system operation. In practical applications, this system not only can be applied to the daily monitoring of power equipment, but also can play an important role in fault diagnosis, preventive maintenance and operation optimization of power equipment, providing comprehensive technical support for the safe and efficient operation of the power industry, and is an important part of the intelligent and digital upgrading of the power system.

[0061] In the following, the technical solutions of the present application will be described in detail with reference to the accompanying drawings:

[0062] Figure 1 is a schematic block diagram showing a conventional SF6 circuit breaker. Figure 2 is a schematic block diagram showing an SF6 circuit breaker according to an embodiment of the present application.

[0063] As shown in Figure 1 , the conventional SF6 circuit breaker includes three mechanism boxes, i.e., mechanism boxes 102, 104, 106, one of which is provided for each phase (e.g., A, B, C) of the circuit breaker. As shown in Figure 1As shown, the mechanism box 102 includes an SF6 density meter 1024 and a sensor 1022. The SF6 density meter 1024 is used to monitor the state of the SF6 gas of the mechanism box 102 and generate an analog signal representing the state of the SF6 gas, and the sensor 1022 processes the analog signal to convert it into a digital signal. A cable 1026 transmits the signal from the sensor 1022 of the mechanism box 102 to the user's control box. The mechanism box 104 includes an SF6 density meter 1044 and a sensor 1042. The SF6 density meter 1044 is used to monitor the state of the SF6 gas of the mechanism box 104 and generate an analog signal representing the state of the SF6 gas, and the sensor 1042 processes the analog signal to convert it into a digital signal. A cable 1046 transmits the signal from the sensor 1042 of the mechanism box 104 to the user's control box. The mechanism box 106 includes an SF6 density meter 1064 and a sensor 1062. The SF6 density meter 1064 is used to monitor the state of the SF6 gas of the mechanism box 106 and generate an analog signal representing the state of the SF6 gas, and the sensor 1062 processes the analog signal to convert it into a digital signal. A cable 1066 transmits the signal from the sensor 1062 of the mechanism box 106 to the user's control box. Among them, the control box is a device used for centralized control and monitoring of signals in the electrical system, which usually contains various electronic control and monitoring devices such as signal processors, display panels, alarm systems, data storage units, etc. In high-voltage electrical equipment, the control box is used to receive and process signals from multiple sensors, such as SF6 gas density and temperature sensors, as well as other signals related to the running state of the equipment. The design of the control box needs to consider factors such as dustproof, waterproof, anti-electromagnetic interference, etc. to ensure its stability in harsh environments.

[0064] Therefore, the conventional SF6 sensor design is to equip each phase mechanism box with a density meter and a sensor, and the signals are transmitted to the control cabinet in the control room through the cable of each phase, which requires more on-site work, is more troublesome to construct, needs to consider more contents, and has higher additional construction cost. In traditional electrical systems, the signals of each sensor or device can be transmitted directly to the control room or control box through independent cables. However, this wiring method can cause complex on-site wiring, high construction cost, and inconvenient maintenance in the case of many devices and multiple phases (such as a three-phase power system). Using a summary cable can summarize the signals of multiple sensors at the device end or near the device, and then transmit them to the control box through one or more cables, which greatly simplifies the wiring, reduces the construction cost, and improves the maintainability of the system.

[0065] Figure 2 is a schematic block diagram showing an SF6 circuit breaker according to an embodiment of the present application.

[0066] As Figure 2As shown, the SF6 circuit breaker of the present invention includes three mechanism boxes, namely, mechanism boxes 202, 204, and 206. For each phase (for example, A, B, and C) of the circuit breaker, one mechanism box among the mechanism boxes 202, 204, and 206 is provided. Figure 2 As shown, the mechanism box 202 includes an integrated gas state monitoring unit 2022, which integrates an SF6 density meter and a sensor. The SF6 density meter is used to monitor the state of the SF6 gas in the mechanism box 202 and generate an analog signal representing the state of the SF6 gas. The sensor converts the analog signal into a digital signal. The SF6 density meter is used to monitor at least one of the pressure and density of the SF6 gas in the mechanism box 202. A summary cable 2026 transmits the signal from the integrated gas state monitoring unit 2022 of the mechanism box 202 to the control box 208. The mechanism box 204 includes an integrated gas state monitoring unit 2042, which integrates an SF6 density meter and a sensor. The SF6 density meter is used to monitor the state of the SF6 gas in the mechanism box 204 and generate an analog signal representing the state of the SF6 gas. The sensor converts the analog signal into a digital signal. The SF6 density meter is used to monitor at least one of the pressure and density of the SF6 gas in the mechanism box 204. Aggregation cable 2046 transmits signals from integrated gas state monitoring unit 2042 in mechanism box 204 to control box 208. Mechanism box 206 includes integrated gas state monitoring unit 2062, which integrates an SF6 density meter and a sensor. The SF6 density meter monitors the state of SF6 gas in mechanism box 206 and generates an analog signal representing the state of the SF6 gas. The sensor converts the analog signal into a digital signal. The SF6 density meter monitors at least one of the pressure and density of the SF6 gas in mechanism box 206. Aggregation cable 2066 transmits signals from integrated gas state monitoring unit 2062 in mechanism box 206 to control box 208.

[0067] like Figure 2 As shown, the aggregation cables 2026, 2046, 2066 are connected between each mechanism box and the control box 208, and the aggregation cables 2026, 2046, 2066 transmit the signals from each mechanism box to the control box 208. Figure 2The summary cable is shown as three, but the summary cable can also be a multi-core cable capable of transmitting signals of multiple mechanisms at the same time. The control box 208 includes multiple input ports (e.g., 208-1, 208-2, 208-3) connected to the summary cable to receive signals of each mechanism box and multiple output ports (e.g., 208-4, 208-5, 208-6) for external user equipment to output the signals of each mechanism box. At least one of the multiple input ports and the multiple output ports can also be in the form of a plug connector. Although not shown, the control box 208 can include a signal processing module that analyzes the signals from each mechanism box in real time to identify abnormal gas state of the mechanism box and trigger a warning or control instruction. Preferably, the control box 208 can also include a data storage module that saves historical monitoring data of the signals of each mechanism box. In addition, the integrated gas state monitoring unit can include a temperature compensation module that automatically corrects the monitoring results according to the change of the ambient temperature, ensuring the accuracy of the signals under different temperature conditions.

[0068] Figure 3 is a schematic block diagram showing the connection between a conventional SF6 circuit breaker and a customer device. In Figure 3 the solid lines between the blocks represent the connection between the blocks through the cable to realize the transmission of signals. Specifically, the specific components of the conventional SF6 circuit breaker and the customer device and the connection relationship between the two are as follows: the circuit breaker mechanism box 302 contains the sensor unit 302-2, the circuit breaker mechanism box 304 contains the sensor unit 304-2, and the circuit breaker mechanism box 306 contains the sensor unit 306-2. The sensor unit 302-2 is connected to the customer terminal box 314 through a separate sensor cable laid in the cable trench, the sensor 304-2 is connected to the customer terminal box 312 through a separate sensor cable laid in the cable trench, and the sensor unit 306-2 is connected to the customer terminal box 310 through a separate sensor cable laid in the cable trench. The circuit breaker mechanism box 302, the circuit breaker mechanism box 304, and the circuit breaker mechanism box 306 are connected to three separate input ports of the circuit breaker control box 308 through the same cable. The three separate output ports of the circuit breaker control box 308 are connected to the input ports of the customer terminal box 310, the customer terminal box 312, and the customer terminal box 314 through three separate customer cables, respectively. Next, the output ports of the customer terminal box 310, the customer terminal box 312, and the customer terminal box 314 are connected to the control room 316 through separate customer cables, respectively.

[0069] Figure 4 is a schematic block diagram showing the connection between an SF6 circuit breaker and a customer device according to an embodiment of the present application. In Figure 4The solid lines between the various blocks represent that the various blocks are connected through cables to realize the transmission of signals. Specifically, the specific components of the SF6 circuit breaker and the customer device according to an embodiment of the utility model and the connection relationship therebetween are as follows: the circuit breaker mechanism box 402 contains an integrated gas state monitoring unit 402-2, the circuit breaker mechanism box 404 contains an integrated gas state monitoring unit 404-2, and the circuit breaker mechanism box 406 contains an integrated gas state monitoring unit 406-2. The integrated gas state monitoring unit 402-2 and the circuit breaker mechanism box 402 are connected to the input port of the circuit breaker control box 408 through a separate sensor cable laid in the cable trench, the integrated gas state monitoring unit 404-2 and the circuit breaker mechanism box 404 are connected to the input port of the circuit breaker control box 408 through a separate sensor cable laid in the cable trench, and the integrated gas state monitoring unit 406-2 and the circuit breaker mechanism box 406 are connected to the input port of the circuit breaker control box 408 through a separate sensor cable laid in the cable trench. Three separate output ports of the circuit breaker control box 408 are connected to the input ports of the customer terminal box 410, the customer terminal box 412 and the customer terminal box 414 through three separate customer cables respectively. Next, the output ports of the customer terminal box 410, the customer terminal box 412 and the customer terminal box 414 are connected to the control room 416 through separate customer cables respectively.

[0070] Through the technical scheme of the utility model, the following technical effects are realized:

[0071] 1. The SF6 density meter and the sensor are integrated, and the use is more convenient.

[0072] 2. The SF6 sensor signals of each phase mechanism box are first collected in the local control box through the collection cable and the plug, and then used by the customer.

[0073] 3. The problems of a large number of design and construction costs on site are saved, and the use is convenient and convenient.

[0074] The above only describes preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A circuit breaker using SF6 gas as insulation and arc extinguishing medium, characterized in that: The circuit breaker comprises: A plurality of mechanism boxes (202), each of the mechanism boxes being arranged inside the circuit breaker, each of the mechanism boxes being used to accommodate one phase of the circuit breaker, and one mechanism box being provided for each phase of the circuit breaker, wherein each of the mechanism boxes comprises an integrated gas state monitoring unit (2022) for monitoring the state of the SF6 gas in the corresponding mechanism box, the integrated gas state monitoring unit being integrated with an SF6 density meter and a sensor, and the integrated gas state monitoring unit further comprising a signal output terminal, the SF6 density meter being used to monitor the state of the SF6 gas in the corresponding mechanism box and generate an analog signal representing the state of the SF6 gas, the sensor converting the analog signal into a digital signal representing a result of monitoring the state of the SF6 gas, and the signal output terminal outputting the digital signal; A control box (208) is arranged inside the circuit breaker, and includes a plurality of receiving ports (208-1), each of the receiving ports being connected to one of the signal output ports via an aggregation cable, and the control box receives the digital signal via the aggregation cable.

2. The circuit breaker according to claim 1, wherein: The control box further comprises a plurality of output ports (208-4), each output port being connected to one of the receiving ports, and the plurality of output ports being used for externally connecting to user equipment to output the digital signal received by the corresponding receiving port.

3. The circuit breaker according to claim 2, wherein: The SF6 density meter is used to monitor at least one of the pressure and density of the SF6 gas in the corresponding mechanism box.

4. The circuit breaker according to claim 2, wherein: At least one of the plurality of receiving ports and the plurality of output ports is in the form of a plug connector.

5. The circuit breaker according to any one of claims 1 to 4, characterized in that: The aggregation cable adopts a multi-core cable and can transmit signals of multiple mechanism boxes at the same time.

6. The circuit breaker according to any one of claims 1 to 4, characterized in that: The control box includes a signal processing module, which performs real-time analysis on the signal from each mechanism box to identify abnormal SF6 gas state of the mechanism box and trigger an early warning or control instruction.

7. The circuit breaker according to any one of claims 1 to 4, characterized in that: The control box includes a data storage module, which stores historical data of the digital signal of each mechanism box.

8. The circuit breaker according to any one of claims 1 to 4, characterized in that: The integrated gas state monitoring unit includes a temperature compensation module, which corrects the state monitoring result according to changes in ambient temperature.

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