CN210071742U - SF (sulfur hexafluoride)6On-line monitoring system - Google Patents
SF (sulfur hexafluoride)6On-line monitoring system Download PDFInfo
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- CN210071742U CN210071742U CN201920248690.0U CN201920248690U CN210071742U CN 210071742 U CN210071742 U CN 210071742U CN 201920248690 U CN201920248690 U CN 201920248690U CN 210071742 U CN210071742 U CN 210071742U
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Abstract
The utility model discloses a SF6 on-line monitoring system, including temperature collector, humidity collector, SF6/O ₂ collector, main control unit, LCD display screen, fan controller, fan, host computer and laser printer, temperature collector's output, humidity collector's output and SF6/O ₂ collector's output all are connected with main control unit's input, main control unit's output is connected with fan controller's input, fan controller's output is connected with the input of fan, main control unit is connected with the LCD display screen, main control unit's output and host computer are connected, the host computer is connected with laser printer. The advantages are that: when the SF6 gas content in the environment exceeds the standard or is anoxic, the system gives an alarm in real time, and meanwhile, the ventilator is automatically started to ventilate.
Description
Technical Field
The utility model belongs to SF6The technical field of on-line monitoring, in particular to SF6Provided is an online monitoring system.
Background
Pure SF6The gas is colorless, tasteless and non-inflammable, and has stable chemical performance at normal temperature, which is more than 5 times of the specific gravity of air. But in the power system, due to SF6The gas is mainly used as an insulating and arc-extinguishing medium, and under the influence of electric arc, partial discharge, high temperature and other factors, SF6The gas will decompose. Its decomposition products can generate corrosive electrolyte when it is in water, especially some high-toxic decomposition products, such as SF4、S2F2、SOF2、HF、SO2For example, a large inhalation may cause dizziness and pulmonary edema, even coma and death. In a relatively sealed room, SF due to poor air circulation6And its decomposition products are deposited in the chamber, plus SF6The gas is colorless and tasteless, thereby causing great harm to patrols and maintainers. When loaded with SF6After leakage in the distribution equipment room of the installation, e.g. GIS, SF6Gas is gathered in terrace top lower level space, when reaching certain concentration after, if the staff gets into indoorly, can cause the brain oxygen deficiency, makes the people suffocate and causes major accident.
Currently, SF is probed6The concentration instrument adopts the following methods: sensor detection, negative corona discharge, thermal desorption, laser infrared, and the like. However, most of these methods have the following disadvantages:
1. not detecting SF6The concentration sensor is easily affected by environmental gases, such as freon, chlorine, hydrogen and other irritant gases can affect the halogen sensor, that is, smoke can affect the measurement result at the side nozzle.
2. The false alarm rate is high, is greatly influenced by environmental factors, and is influenced by humidity and temperature, so that the false alarm rate is high.
3. The service life is short, and the collector is not easy to adjust. The characteristic curves of each collector are different, and the device is generally adjusted by a manufacturer before leaving a factory, so that if the collector fails and needs to be replaced, the whole device needs to be adjusted again.
4. The effect of frequency drift on the collector also increases the likelihood of errors.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a SF6On-line monitoring system of SF in the environment6The system alarms in real time, and simultaneously automatically starts the ventilator to ventilate, adopts the ultrasonic speed measurement principle, has the advantages of high reliability, low false alarm rate, small influence by environmental factors, no influence of frequency drift, small error and the like, and has long service life.
The utility model discloses a SF6The on-line monitoring system comprises a temperature collector, a humidity collector and an SF6/O2Collector, main control unit, LCD display screen, fan controller, fan, host computer and laser printer, temperature collector's output, humidity collector's output and SF6/O2The output of collector all is connected with the input of main control unit, the output of main control unit is connected with the input of fan controller, the output of fan controller is connected with the input of fan, the main control unit is connected with the LCD display screen, the output and the host computer of main control unit are connected, the host computer is connected with laser printer, and the system mainly detects SF in the ambient air6Gas content and oxygen content, SF in the environment6The gas content exceeds the standard or is lack of oxygen, the alarm is carried out in real time, and meanwhile, the main control unit automatically starts the ventilator to ventilate until SF in the air6And the upper computer prints data generated by the system in one stage through the laser printer, so that the working personnel can conveniently analyze the environmental change and take certain measures.
Further, the SF6/O2The collector is an ultrasonic sensor, and the ultrasonic speed is different at the transmission speed of gases with different molar masses. SF6The molecular weight of the gas is 5 times that of air, even if a small amount of gas leaks, the change of the gas molar mass can be reflected, and the ultrasonic waveThe speed is also different. By measuring the change of sound velocity through a special ultrasonic sensor, the SF can be reflected6The leak concentration changes.
Furthermore, the main control unit is an STC89C52 single chip microcomputer, has low energy consumption, strong functions and low cost, and can meet the requirements of a system and the control cost.
Further, host computer and main control unit both way communication, the state of host computer through the control unit control fan, when unexpected condition or specific needs ventilation appear in the environment, carry out work through host computer control fan to ensure that the index is normal in the environment, guarantee staff's safety.
Furthermore, the main control unit supports at most 128 collectors, the collectors of the system can be added or deleted according to needs, and the main control unit supports the connection of the 128 collectors, so that the monitoring needs of environments with different sizes are met.
Further, the temperature collector, the humidity collector and the SF6/O2RS485 bus connection is adopted between the collector and the main control unit, and between the main control unit and the upper computer and between the main control unit and the fan controller, the RS485 bus has good stability, is not interfered by other factors of the environment, and further ensures the stability of the system.
The utility model has the advantages that: when SF is in the environment6The system alarms in real time, and simultaneously automatically starts the ventilator to ventilate, adopts the ultrasonic speed measurement principle, has the advantages of high reliability, low false alarm rate, small influence by environmental factors, no influence of frequency drift, small error and the like, and has long service life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and in the drawings, the components or parts are not necessarily drawn to actual scale.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the following embodiments are merely used to more clearly illustrate the technical solutions of the present invention, and therefore are only used as examples, and the protection scope of the present invention cannot be limited thereby.
As shown in fig. 1: the utility model discloses a SF6The on-line monitoring system comprises a temperature collector, a humidity collector and an SF6/O2Collector, main control unit, LCD display screen, fan controller, fan, host computer and laser printer, temperature collector's output, humidity collector's output and SF6/O2The output of collector all is connected with the input of main control unit, the output of main control unit is connected with the input of fan controller, the output of fan controller is connected with the input of fan, the main control unit is connected with the LCD display screen, the output and the host computer of main control unit are connected, the host computer is connected with laser printer, and the system mainly detects SF in the ambient air6Gas content and oxygen content, SF in the environment6The gas content exceeds the standard or is lack of oxygen, the alarm is carried out in real time, and meanwhile, the main control unit automatically starts the ventilator to ventilate until SF in the air6And the upper computer prints data generated by the system in one stage through the laser printer, so that the working personnel can conveniently analyze the environmental change and take certain measures.
In this example, the SF6/O2The collector is an ultrasonic sensor, and the ultrasonic speed is different at the transmission speed of gases with different molar masses. SF6The molecular weight of the gas is 5 times that of air, and even if a small amount of gas leaks, the change in the molar mass of the gas is reflected, and the velocities of the ultrasonic waves are also different. By measuring the change of sound velocity through a special ultrasonic sensor, the SF can be reflected6The leak concentration changes.
In this embodiment, the main control unit is an STC89C52 single chip microcomputer, and the main control unit has low energy consumption, powerful functions and low cost, and can meet the requirements of a system and the control cost.
In this embodiment, host computer and main control unit both way communication, the state of host computer through the control unit control fan, when unexpected condition appears or specific needs ventilate in the environment, carries out work through host computer control fan to ensure that the index is normal in the environment, guarantee staff's safety.
In this embodiment, the main control unit supports at most 128 collectors, collectors of the system may be added or deleted as needed, and the main control unit supports the connection of the 128 collectors, so as to meet the requirement of monitoring environments of different sizes.
In this embodiment, the temperature collector, the humidity collector, and the SF6/O2RS485 bus connection is adopted between the collector and the main control unit, and between the main control unit and the upper computer and between the main control unit and the fan controller, the RS485 bus has good stability, is not interfered by other factors of the environment, and further ensures the stability of the system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. SF (sulfur hexafluoride)6The on-line monitoring system is characterized in that: comprises a temperature collector, a humidity collector and SF6/O2Collector, main control unit, LCD display screen, fan controller, fan, host computer and laser printer, temperature collector's output, humidity collector's output and SF6/O2The output ends of the collectors are connected with the input end of the main control unit, and the output end of the main control unit is connected with the input end of the main control unitThe input of fan controller is connected, the output of fan controller is connected with the input of fan, the main control unit is connected with the LCD display screen, the output and the host computer of main control unit are connected, the host computer is connected with laser printer.
2. SF according to claim 16The on-line monitoring system is characterized in that: the SF6/O2The collector is an ultrasonic sensor.
3. SF according to claim 16The on-line monitoring system is characterized in that: the main control unit is an STC89C52 singlechip.
4. SF according to claim 16The on-line monitoring system is characterized in that: the upper computer is in two-way communication with the main control unit, and the upper computer controls the state of the fan through the control unit.
5. An SF according to claim 46The on-line monitoring system is characterized in that: the main control unit supports and is connected with 128 collectors at most.
6. SF according to claim 16The on-line monitoring system is characterized in that: the temperature collector, the humidity collector and the SF6/O2RS485 buses are adopted for connection between the collector and the main control unit, and between the main control unit and the upper computer and between the main control unit and the fan controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920248690.0U CN210071742U (en) | 2019-02-27 | 2019-02-27 | SF (sulfur hexafluoride)6On-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920248690.0U CN210071742U (en) | 2019-02-27 | 2019-02-27 | SF (sulfur hexafluoride)6On-line monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN210071742U true CN210071742U (en) | 2020-02-14 |
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| CN201920248690.0U Active CN210071742U (en) | 2019-02-27 | 2019-02-27 | SF (sulfur hexafluoride)6On-line monitoring system |
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|---|---|
| CN (1) | CN210071742U (en) |
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2019
- 2019-02-27 CN CN201920248690.0U patent/CN210071742U/en active Active
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