SF6 monitoring device

Abstract

The utility model relates to the technical field of industrial monitoring, in particular to an SF6 monitoring device. Comprising a host, a PoE switch and a plurality of sensors. The PoE switch comprises a plurality of network ports, the plurality of sensors are respectively connected with different network ports of the PoE switch so as to detect the SF6 gas concentration, the host is connected with another network port of the PoE switch so as to communicate with the plurality of sensors through the PoE switch and obtain an SF6 gas concentration detection value, a fan control module is arranged in the host, and the fan control module is connected with the plurality of sensors through the PoE switch. The control module is used for controlling an external fan to be started when the SF6 gas concentration detection value exceeds a preset value; by arranging the PoE switch, the host and the plurality of sensor devices can perform power supply and data transmission through the PoE switch, integration of power supply and communication is realized, the number of cables and interfaces in the system is reduced, and interface unification and communication protocol unification of the system are realized; the fan control module is arranged in the host to timely control the starting of the external fan, so that the occurrence of SF6 poisoning or oxygen deficit accidents can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of industrial monitoring technology, and in particular to an SF6 monitoring device. Background Technology

[0002] SF6 monitoring devices are mainly used in GIS rooms, SF6 combined electrical equipment rooms, and 10KV and 35KV high-voltage switch rooms of substations at different voltage levels such as 110KV, 220KV, and 500KV. They are used to monitor SF6 gas leakage and oxygen content in the air in real time. When SF6 gas leakage occurs, because the density of SF6 gas is more than 5 times that of air, it is easy to accumulate in the lower space, which can cause SF6 poisoning or local hypoxia and easily lead to major accidents. By installing SF6 monitoring devices in the scene, accidents can be effectively avoided.

[0003] Existing SF6 monitoring technologies have limited communication methods and certain limitations in interface compatibility. Furthermore, existing SF6 monitoring devices are often stand-alone systems with a small number of connected sensors, requiring a large number of devices to be mounted in the scene, which seriously affects power safety and management and maintenance.

[0004] Therefore, designing an SF6 monitoring device with a more compatible interface protocol and functions, and capable of mounting multiple sensors, is of great importance to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is to provide an SF6 monitoring device with higher compatibility and capable of mounting multiple sensors, so as to solve the problems of multiple device connection cables, inconsistent protocols, and inability to form unified data management in the prior art.

[0006] This utility model discloses an SF6 monitoring device, which includes: a host, a PoE switch, and multiple sensors; the PoE switch includes multiple network ports, and the multiple sensors are respectively connected to different network ports of the PoE switch for detecting SF6 gas concentration; the host is connected to another network port of the PoE switch to communicate with the multiple sensors through the PoE switch and obtain the SF6 gas concentration detection value; the host is equipped with a fan control module to control the external fan to start when the SF6 gas concentration detection value exceeds a preset value.

[0007] Optionally, all of the plurality of sensors are SF6 sensors.

[0008] Optionally, the plurality of sensors include an SF6 sensor, and also include one or more of an oxygen sensor, a humidity sensor, and a temperature sensor.

[0009] Optionally, multiple network ports of the PoE switch all adopt the IPv6 communication protocol.

[0010] Optionally, the wind turbine control module includes a drive unit and a fault detection unit, both of which are connected to the main control module.

[0011] Optionally, the fault detection unit includes a current sampling circuit, an analog switch, and an operational amplifier circuit. The input terminal of the current sampling circuit is connected to an external fan, the output terminal of the current sampling circuit is connected to the input terminal of the analog switch, and the output terminal of the analog switch is connected to the input terminal of the operational amplifier circuit.

[0012] Optionally, the current sampling circuit includes a sampling resistor and a protection diode, wherein the sampling resistor is connected in parallel with the protection diode.

[0013] Optionally, the host further includes a main control module, a DC-PoE interface module, and a wireless communication module; the main control module is connected to the wireless communication module, and the DC-PoE interface module is connected to both the main control module and the PoE switch.

[0014] Optionally, the host computer further includes a display module connected to the main control module for displaying monitoring data.

[0015] Optionally, the host also includes a power interface for connecting an external power source.

[0016] Compared with the prior art, the beneficial effects of the SF6 monitoring device provided in this utility model embodiment are as follows: By designing an SF6 monitoring device, including a host, a PoE switch, and multiple sensors; the PoE switch includes multiple network ports, and multiple sensors are connected to different network ports of the PoE switch to detect SF6 gas concentration; the host is connected to another network port of the PoE switch to communicate with multiple sensors through the PoE switch and obtain SF6 gas concentration detection values; the host is equipped with a fan control module to control the external fan to start when the SF6 gas concentration detection value exceeds a preset value; by setting a PoE switch in the system, the host and multiple sensor devices can all be powered and transmit data through the PoE switch, realizing integrated power supply and communication, which not only effectively reduces the number of cables and interfaces in the system, but also achieves the unification of interfaces and communication protocols in the system, making the system more compatible; by setting a fan control module in the host, the external fan can be controlled to start when the SF6 gas concentration detection value exceeds a preset value, effectively avoiding SF6 poisoning and oxygen deficiency accidents. Attached Figure Description

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the SF6 monitoring device provided in this embodiment of the utility model;

[0019] Figure 2 This is a system block diagram of the host provided in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the fault detection unit provided in this embodiment of the utility model.

[0021] Figure label:

[0022] 100, Host; 200, PoE Switch; 300, Sensor; 400, Fan; 210, Network Port. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1 to 3 As shown, this utility model provides a specific embodiment of an SF6 monitoring device.

[0025] An SF6 monitoring device, reference Figure 1 and Figure 2 The SF6 monitoring device includes: a host 100, a PoE switch 200, and multiple sensors 300; wherein, the PoE switch 200 includes multiple network ports 210, and the multiple sensors 300 are respectively connected to different network ports 210 of the PoE switch 200 for detecting SF6 gas concentration. The host 100 is connected to another network port 210 of the PoE switch 200 to communicate with the multiple sensors 300 through the PoE switch 200 and obtain the SF6 gas concentration detection value. The host 100 is equipped with a fan control module 140, which is used to connect to an external fan 400 to control the fan 400 to turn on when the SF6 gas concentration detection value exceeds a preset value.

[0026] Specifically, refer to Figure 1 and Figure 2The sensor is used to detect the concentration of SF6 gas in the air. The SF6 online detection system includes multiple sensors 300. All of the multiple sensors 300 can be SF6 sensors to detect the concentration of SF6 gas in different environments. Alternatively, the multiple sensors 300 can be SF6 sensors and other sensors, such as one or more of oxygen sensors, humidity sensors and temperature sensors, to detect the concentration of SF6 gas, oxygen concentration, humidity and temperature in the environment.

[0027] Specifically, the SF6 sensor can be a high-sensitivity SF6 infrared sensor. The SF6 infrared sensor is used to detect and measure the concentration of SF6 gas. The SF6 infrared sensor uses infrared technology to detect the concentration of SF6 gas in the ambient air. When SF6 gas passes through the SF6 infrared sensor, the infrared light interacts with the SF6 molecules in the gas, producing a specific absorption characteristic. The SF6 infrared sensor determines the concentration of SF6 gas in the ambient air by measuring the change in this absorption characteristic.

[0028] Furthermore, the PoE switch 200 is a network switch that can provide power to connected devices via Ethernet cable, allowing power to be transmitted to PoE-enabled devices via network cable without the need for an additional power line.

[0029] By setting up a PoE switch 200 in the system, the host 100 and multiple sensors 300 can be connected to the PoE switch 200. The host 100 can communicate with multiple connected sensors through the PoE switch 200 to obtain different detection data. The PoE switch 200 can realize communication and power supply between multiple devices, which not only effectively reduces the number of cables and interfaces in the system, but also realizes the unification of interfaces and communication protocols in the system, making the system more compatible and enabling plug-and-play devices.

[0030] Furthermore, the fan control module 140 is used to directly connect to the external fan 400. The fan 400 can generate airflow and wind in the environment for applications such as ventilation, cooling, air circulation, or gas transmission. The host 100 has a preset standard concentration value for SF6 gas. When the host 100 obtains the SF6 concentration data uploaded by the sensor through the PoE switch 200, it will compare the detected SF6 concentration with the preset standard concentration value. When the detected SF6 concentration is higher than the preset standard concentration value, it will send a corresponding control command to the fan control module 140 to control the external fan 400 to turn on, thereby accelerating the airflow and expelling the SF6 gas, effectively preventing oxygen deficiency in the environment and thus avoiding major accidents.

[0031] Because SF6 gas is more than five times denser than air, it tends to accumulate in lower atmospheres, causing localized oxygen deficiency and potentially leading to major accidents. Installing SF6 monitoring devices within the site can effectively prevent such accidents. However, existing SF6 monitoring technologies rely on a single communication method and have limitations in interface compatibility. Furthermore, existing SF6 monitoring devices are often standalone systems with limited sensor connectivity, requiring a large number of devices to be mounted within the site, which seriously impacts electrical safety and management / maintenance.

[0032] In this embodiment, an SF6 monitoring device is designed, including a host 100, a PoE switch 200, and multiple sensors 300. By setting the PoE switch 200 in the SF6 monitoring device, the host 100 and the multiple sensors 300 can all receive power and data through the PoE switch 200, realizing integrated power supply and communication. This not only effectively reduces the number of cables and interfaces in the system, but also unifies the interfaces and communication protocols in the system, making the system more compatible. Furthermore, by setting a fan control module 140 in the host 100, the external fan 400 can be turned on in a timely manner according to the detected SF6 gas concentration, effectively preventing SF6 poisoning or oxygen deficiency accidents.

[0033] In one embodiment, multiple network ports 210 of the PoE switch 200 all use the IPv6 communication protocol.

[0034] Specifically, IPv6 is an Internet protocol that uses 128-bit addresses, providing more IP addresses to support the ever-growing number of Internet devices. Furthermore, its concise header improves the efficiency of data packet processing. IPv6 also introduces the SLAAC mechanism, allowing devices to automatically configure their IP addresses based on network prefixes, simplifying address management. IPv6 also provides end-to-end encryption and authentication, enhancing communication security. Simultaneously, it allows for the connection of more devices, eliminating the limitation on the number of connected devices within the same substation and further realizing the Internet of Things.

[0035] In one embodiment, reference Figure 1 and Figure 2 The host 100 includes a main control module 110, a DC-PoE interface module 120, and a wireless communication module 130; the main control module 110 is connected to the wireless communication module 130, and the DC-PoE interface module 120 is connected to the main control module 110 and the PoE switch 200 respectively.

[0036] Specifically, refer to Figure 1 and Figure 2The main control module 110 adopts the "Dianhong OS" operating system of China Southern Power Grid, realizing data security, business processing, data processing, protocol unification and wind turbine control; the DC-PoE interface module 120 is used to connect to the network port 210 of the PoE switch 200. The main control module 110 is connected to the DC-PoE interface module 120 to communicate with multiple sensors 300 through the PoE switch 200; the wireless communication module 130 adopts Huawei's "Star Flash" wireless communication technology. The main control module 110 is connected to the wireless communication module 130 to connect to the cloud server through the wireless communication module 130 to realize remote communication and data reporting; the wind turbine control module 140 is connected to multiple wind turbines 400 to provide drive and detection for the wind turbines 400. The main control module 110 is connected to the wind turbine control module 140 to control the operation of multiple wind turbines 400.

[0037] In one embodiment, reference Figure 1 and Figure 2 The host 100 also includes a display module 150, which is connected to the main control module 110 for displaying monitoring data.

[0038] Specifically, refer to Figure 1 and Figure 2 The display module 150 uses a 21.5-inch IPS true color touch capacitive display screen, which can display the real-time values ​​of SF6 gas, oxygen, temperature and humidity to display the SF6 gas concentration value and oxygen concentration value of each node; and will issue an audible and visual alarm when the SF6 gas concentration value and oxygen concentration value are abnormal and reach the alarm set value.

[0039] In one embodiment, the host 100 also includes a power interface for connecting an external power source.

[0040] Specifically, the power interface supports AC220V power supply and DC12-57V power supply. The host 100 can not only use AC220V and DC12-57V power supply through the power interface, but also use PoE power supply through the DC-PoE interface module 120. When AC or DC input is used, PoE power supply is stopped and Ethernet communication is maintained. When AC or DC power supply is stopped, PoE power supply is seamlessly switched to ensure the normal operation of the system.

[0041] In one embodiment, reference Figure 1 and Figure 2 The fan control module 140 includes a drive unit 141 and a fault detection unit 142. The drive unit 141 is connected to the main control module 110 and multiple fans 400 respectively, and the fault detection unit 142 is connected to the main control module 110 and multiple fans 400 respectively.

[0042] Specifically, refer to Figure 1 and Figure 2 The drive unit 141 is connected to the main control module 110 and multiple fans 400 respectively to receive control commands from the main control module 110 and control the operation of multiple fans 400; the fault detection unit 142 is connected to the main control module 110 and multiple fans 400 respectively to monitor the current and voltage of multiple fans 400 in real time and feed them back to the main control module 110 to ensure the safe operation of multiple fans 400.

[0043] In one embodiment, reference Figure 2 and Figure 3 The fault detection unit 142 includes a current sampling circuit 1421, an analog switch 1422, and an operational amplifier circuit 1423. The input terminal of the current sampling circuit 1421 is connected to the fan 400, the output terminal of the current sampling circuit 1421 is connected to the input terminal of the analog switch 1422, the output terminal of the analog switch 1422 is connected to the input terminal of the operational amplifier circuit 1423, and the output terminal of the operational amplifier circuit 1423 is connected to the main control module 110.

[0044] Specifically, refer to Figure 2 and Figure 3 The current sampling circuit 1421 includes a sampling resistor R1 and a protection diode Z1, with the sampling resistor R1 connected in parallel with the protection diode Z1. The analog switch 1422 is a 4-channel analog switch 1422, which includes 4 input terminals. It works in conjunction with the 4-channel current sampling circuit 1421 to allow simultaneous connection of 4 external fans. The output terminal of the analog switch 1422 is connected to the operational amplifier circuit 1423 to achieve level matching, signal amplification, and ADC impedance matching. The fault detection unit 142 can perform real-time detection and early warning for multiple fans 400.

[0045] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. An SF6 monitoring device, characterized in that, include: The system includes a host computer, a PoE switch, and multiple sensors. The PoE switch has multiple network ports, and the multiple sensors are connected to different network ports of the PoE switch to detect SF6 gas concentration. The host computer is connected to another network port of the PoE switch to communicate with the multiple sensors through the PoE switch and obtain the SF6 gas concentration detection value. The host computer is equipped with a fan control module to control the external fan to start when the SF6 gas concentration detection value exceeds a preset value.

2. The SF6 monitoring device according to claim 1, characterized in that, All of the aforementioned sensors are SF6 sensors.

3. The SF6 monitoring device according to claim 1, characterized in that, The plurality of sensors include an SF6 sensor, and also include one or more of an oxygen sensor, a humidity sensor, and a temperature sensor.

4. The SF6 monitoring device according to claim 1, characterized in that, The PoE switch uses the IPv6 communication protocol for multiple network ports.

5. The SF6 monitoring device according to claim 1, characterized in that, The wind turbine control module includes a drive unit and a fault detection unit, both of which are connected to the host.

6. The SF6 monitoring device according to claim 5, characterized in that, The fault detection unit includes a current sampling circuit, an analog switch, and an operational amplifier circuit. The input terminal of the current sampling circuit is connected to an external fan, the output terminal of the current sampling circuit is connected to the input terminal of the analog switch, and the output terminal of the analog switch is connected to the input terminal of the operational amplifier circuit.

7. The SF6 monitoring device according to claim 6, characterized in that, The current sampling circuit includes a sampling resistor and a protection diode, wherein the sampling resistor and the protection diode are connected in parallel.

8. The SF6 monitoring device according to claim 1, characterized in that, The host also includes a main control module, a DC-PoE interface module, and a wireless communication module; the main control module is connected to the wireless communication module, and the DC-PoE interface module is connected to both the main control module and the PoE switch.

9. The SF6 monitoring device according to claim 8, characterized in that, The host also includes a display module, which is connected to the main control module to display monitoring data.

10. The SF6 monitoring device according to claim 9, characterized in that, The host also includes a power interface for connecting an external power source.

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