CN2515680Y - Real-time on line monitor for controlling SF6 gas - Google Patents
Real-time on line monitor for controlling SF6 gas Download PDFInfo
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- CN2515680Y CN2515680Y CN 02218522 CN02218522U CN2515680Y CN 2515680 Y CN2515680 Y CN 2515680Y CN 02218522 CN02218522 CN 02218522 CN 02218522 U CN02218522 U CN 02218522U CN 2515680 Y CN2515680 Y CN 2515680Y
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Abstract
Disclosed is a real time online monitoring instrument for monitoring the concentrations of SF 6 gas and oxygen, comprising a shell and a principle control board(4).The principle control board(4) is provided with a CPU unit (5), a power supply unit(13), a communication unit(11), a clock module(6), a displaying unit(7), a keyboard input unit(8), an alarming unit(9) and a separated power supply(12). The communication unit (11) is respectively connected with the separated power supply (12) and the CPU unit (5) by means of wires. The clock module (6), the displaying unit (7), the keyboard input unit (8) and the alarming unit (9) are connected with the CPU unit (5) by means of wires. The utility model also comprises a plurality of combined detectors (1) for detecting the concentrations of the SF 6 gas and the oxygen, and the combined detectors (1) for detecting the concentrations of the SF 6 gas and the oxygen are connected with the communication unit(11) by means of a communication wire(3). The utility model can online monitor the concentrations of the SF 6 gas and the oxygen in real time from plural points, particularly can detect the SF 6 gas of low concentration.
Description
Technical field
The utility model relates to a kind of gas concentration monitor, particularly relate to SF6 gas leak detection technology and oxygen concentration detection technique, be mainly used in the porch of power supply department power distribution equipment chamber or other and be convenient to the place of making an inspection tour and operating, guarantee tour personnel and operating personnel's safety.
Background technology
The SF6 gas leak detection technology that uses mainly contains three classes at present, a kind of is to utilize SF6 gas infrared ray to be had the characteristic of strong absorption effect, Gas Vue TG-30 infrared laser imaging SF6 gas leakage positioning system as LIS company, it is mainly used in the leak detection location of equipment, except that the structure complexity, price is very expensive, is unsuitable for environmental monitoring.Another kind is the slow-footed characteristics that the velocity ratio of utilizing sound wave to propagate in SF6 gas is propagated in atmosphere, 3-026-R002 type SF6 gas alarm instrument as DILO company, it can detect in the environment SF6 gas content qualitatively greater than the concentration of 2% percent by volume, the monitoring alarm that also can connect maximum 6 points by extender, but its extension point can not satisfy the needs of big system very little, the SF6 concentration (percent by volume) 2% of alarm set point is high too, be unsuitable for the needs of the 1000PPM alarm set point of electric system, and SF6 gas during to 2% concentration oxygen concentration may be lower than for a long time 18% danger line.The third is a high-insulation characteristic of utilizing SF6 gas, the SF6 gas leakage detector that adopts the high-voltage corona discharge technology to make, TIF5650A/TIF5750A as TIF company, it can detect qualitatively, and a certain amount of SF6 gas leaks in the environment, but this instrument must be demarcated in the clean air of no SF6 gas before use, this has brought certain trouble to use, and it can not provide warning quantitatively.
Summary of the invention
The purpose of this utility model provides a kind of SF6 gas concentration and oxygen concentration real time and on line monitoring instrument, can particularly can the SF6 gas of low concentration be detected respectively to concentration realization multiple spot, the real time and on line monitoring of SF6 G﹠O.
The technical scheme that realizes above-mentioned purpose is: a kind of SF6 gas concentration and oxygen concentration real time and on line monitoring instrument, comprise housing and master control borad, has CPU element on the master control borad, power supply unit, communication unit, clock module, display unit, the keyboard input block, alarm unit and insulating power supply, communication unit is connected with CPU element with insulating power supply by lead respectively, clock module, display unit, the keyboard input block all is connected with CPU element by lead with alarm unit, also comprise a plurality of SF6 gas concentrations and oxygen concentration combination detector, and the SF6 gas concentration is connected with communication unit by order wire with the oxygen concentration combination detector.
The further technical scheme of the utility model is: SF6 gas concentration and oxygen concentration combination detector are by SF6 gas concentration test section, the oxygen concentration test section, A/D converter, single-chip microcomputer, communication module, power module and insulating power supply module are formed, SF6 gas concentration test section is by controlled oscillator, driving amplifier, step-up transformer, rectifier filer, the corona discharge sensor is formed with the sampling microwave network with accurate adjustable potentiometer, the control end of oscillator is connected with single-chip microcomputer, the output terminal of oscillator is connected with the input end of driving amplifier, the output terminal of driving amplifier is connected with the elementary of step-up transformer, the input end of the secondary and rectifier of transformer is connected, the output terminal of rectifier is connected with the input end of corona discharge sensor, the output terminal of corona discharge sensor is connected with the input end of sampling microwave network, the output terminal of sampling microwave network is connected with a road input end of A/D converter, the signal output part of oxygen concentration test section is connected with the b road input end of A/D converter, the output terminal of A/D converter is connected with the single-chip microcomputer parallel port, and communication module is connected with microcontroller serial port with the insulating power supply module by lead.
After adopting technique scheme, a plurality of SF6 gas concentrations and oxygen concentration combination detector can be arranged in each control point, testing result is input to CPU element by order wire and communication unit, CPU element is to the data processing of classifying, result is outputed to display unit, alarm unit, touring each point data that shows, finish man-machine conversation, realize the multiple spot real time and on line monitoring, alarm unit sends sound and light alarm and to the long-range alerting signal of sending when the SF6 gas concentration is higher than alarm set point or oxygen concentration and is lower than alarm set point.In the further technical scheme of the utility model,, avoided the long-time vibration of oscillator to make the defective of the probe lost of life by the vibration of Single-chip Controlling oscillator.The signal of oscillator output amplifies through overdriven amplifier, make it enough power drive step-up transformers, the high-voltage signal of the secondary output of step-up transformer is handled through rectifier filer, form a negative direct current high voltage and put on the corona discharge sensor, sampling microwave network detects the discharge current that flows through the corona discharge sensor, and this current signal is converted to the voltage signal of certain limit through adjustable potentiometer, this voltage signal is delivered to a road input end of A/D converter, and making it to convert to can be for the digital signal of single-chip microcomputer identification.Single-chip microcomputer is every through certain hour control generator work a period of time, treat to close controlled oscillator again after single-chip microcomputer samples this sensor signal, use the normal concentration SF6 gas that conforms to the concentration of reporting to the police that this sampled signal is demarcated before dispatching from the factory, so just can detect near the SF6 gas concentration of alarm set point quantitatively and particularly can measure the SF6 gas of low concentration, the concentration of alarm set point can be between 100PPM～2000PPM.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the structure principle chart of SF6 gas concentration and oxygen concentration combination detector among Fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, a kind of SF6 gas concentration and oxygen concentration real time and on line monitoring instrument, comprise housing and master control borad 4, has CPU element 5 on the master control borad 4, power supply unit 13, communication unit 11, clock module 6, display unit 7, keyboard input block 8, alarm unit 9 and insulating power supply 12, communication unit 11 is connected with CPU element 5 with insulating power supply 12 by lead respectively, clock module 6, display unit 7, keyboard input block 8 all is connected with CPU element 5 by lead with alarm unit 9, also comprise a plurality of SF6 gas concentrations and oxygen concentration combination detector 1, and the SF6 gas concentration is connected with communication unit 11 by order wire 3 with oxygen concentration combination detector 1.CPU element 5 is made up of single-chip microcomputer 89C52, and clock module 6 is made up of clock chip DS1302, and it is responsible for providing the Beijing time of monitor, so that finish regularly air-exhausting function; Display unit 7 can be a dot matrix lcd, also can be common digital luminescent display tube, is responsible for touring the show relevant parameter of each control point and the Beijing time of monitor; Keyboard input block 8 is used for the setting to systematic parameter, as the system that is provided with detects and to count, and is provided with regularly and blows in the fan time time calibration, shows time that last time, fan cut out etc.; Alarm unit 9 is used for sending sound and light alarm when alarm set point or oxygen concentration are lower than alarm set point and to the long-range alerting signal of sending when the SF6 gas concentration is higher than; Communication unit 11 is finished the data communication between master control borad 4 and each control point; Insulating power supply 12 is the power supplys that aim at the communication unit power supply, other power supply of this power supply and monitor is isolated, so that whole monitor work is reliable and stable, power supply unit 13 is a kind of switch power modules, and it can be transformed into the required working power of monitor exchanging 110V/220V and direct current 110V/220V.
As shown in Figure 2, SF6 gas concentration and oxygen concentration combination detector 1 are by SF6 gas concentration test section, the oxygen concentration test section, A/D converter 21, single-chip microcomputer 22, communication module 28, power module 29 and insulating power supply module 30 are formed, SF6 gas concentration test section is by controlled oscillator 14, driving amplifier 15, step-up transformer 16, rectifier filer 17, corona discharge sensor 18 is formed with the sampling microwave network 19 with accurate adjustable potentiometer 20, the control end of oscillator 14 is connected with single-chip microcomputer 22, the output terminal of oscillator 14 is connected with the input end of driving amplifier 15, the output terminal of driving amplifier 15 is connected with the elementary of step-up transformer 16, the input end of the secondary and rectifier 17 of transformer 16 is connected, the output terminal of rectifier 17 is connected with the input end of corona discharge sensor 18, the output terminal of corona discharge sensor 18 is connected with the input end of sampling microwave network 19, the output terminal of sampling microwave network 19 is connected with a road input end of A/D converter 21, the signal output part of oxygen concentration test section is connected with the b road input end of A/D converter 21, the output terminal of A/D converter 21 is connected with single-chip microcomputer 22 parallel ports, and communication module 28 is connected with single-chip microcomputer 22 serial ports with insulating power supply module 30 by lead.The model of single-chip microcomputer 22 is 89C2051, controlled oscillator 14 can be formed with time base circuit 555, the oscillation frequency of this circuit and dutycycle are certain, but there is dead-beat to control by single-chip microcomputer 22, A/D converter 21 is 16 A/D converters of two-way, adopt the ε-Δ analog to digital converter AD7705 of AD company, this circuit has 2 road input end of analog signal.Insulating power supply module 30 is the power supplys that aim at communication module 28 power supplies, and other power supplys of this power supply and system are isolated, so that the working stability of SF6 gas concentration and oxygen concentration combination detector is reliable.SF6 gas concentration test section principle of work is, the signal driving amplifier 15 of controlled oscillator 14 outputs amplifies, make it enough power drive step-up transformers 16, the high-voltage signal of the secondary output of step-up transformer 16 is handled through rectifier filer 17, form negative direct current high voltage and put on corona discharge sensor 18, sampling microwave network 19 detects the electric current that flows through the corona discharge sensor, and voltage signal converted to the voltage signal of certain limit through accurate adjustable potentiometer 20, this voltage signal is delivered to a road input end of 16 A/D converters of two-way, and making it to convert to can be for 16 position digital signal of single-chip microcomputer 22 identifications.
As shown in Figure 2, the oxygen concentration test section is by sampler 26, boundary current type lambda sensor 23 with accurate adjustable potentiometer 27, the voltage source 31 that detects voltage is provided and provides heating power supply and the variable voltage source of band adjustable potentiometer 25 24 compositions, the input end of sampler 26 is connected with the output terminal of boundary current type lambda sensor 23, the output terminal of sampler 26 is connected with the b road input end of A/D converter, the measuring junction of boundary current type lambda sensor 23 is connected with voltage source 31, and the fire end of boundary current type lambda sensor 23 is connected with variable voltage source 24.For it provides heating power supply, harmonized by accurate adjustable potentiometer 25, because the voltage of 23 pairs of heating power supplies of sensor has different requirements by the output voltage of variable voltage source 24 by variable voltage source 24 for boundary formula current sensor 23.Sensor 23 needs a high-precision voltage source 31 to provide detection voltage to put on measuring junction in addition, so that obtain the stable boundary electric current that becomes certain rule with oxygen concentration, this boundary electric current converts current signal to by sampling microwave network 26 voltage signal of certain limit, voltage range is by 27 fine settings of accurate adjustable potentiometer, makes that actual current curve and desirable electric current---the oxygen concentration curve matches.This sampled signal is delivered to the b road input end of 16 A/D converters 21 of two-way, and making it to convert to can be for 16 position digital signal of single-chip microcomputer 22 identifications.
Single-chip microcomputer 22 comprehensive a, b two-way sampled signal are sent oxygen density value and SF6 gas alarm status information by communication module 28 to order wire 3.
As shown in Figure 1, communication unit 11 on the master control borad 4 also is connected with a temperature, humidity combination detector 2 by connection 3, can measure the temperature and humidity of each control point by temperature, humidity combination detector, whether ventilate, perhaps send warning to environment according to detecting the data decision.
As shown in Figure 1, also have fan control unit on the master control borad 4, and fan control unit 10 and CPU element 5 are connected by lead.Fan control unit 10 when the SF6 gas concentration is higher than alarm set point or oxygen concentration and is lower than alarm set point, the force start fan, the fan that is connected with fan control unit 10 begins air draft automatically, closes fan automatically through certain hour.
Principle of work of the present utility model is as follows: SF6 gas concentration and oxygen concentration combination detector 1 and temperature, humidity combination detector 2 detected information and data are transported to communication unit 11 on the master control borad 4 by order wire, information that communication unit 11 obtains and the data delivery CPU element 5 to the master control borad 4, CPU element 5 is handled these information and data, then result is transported to display unit 7, alarm unit 9 and fan control unit 10, display unit video data result, alarm unit 9 determines whether send alerting signal according to data result, and fan control unit 10 determines whether opening fan according to data result.The utility model is installed in the porch of power supply department power distribution equipment chamber or other is convenient to the place of making an inspection tour and operating, can guarantee tour personnel and operating personnel's safety.
Claims (5)
1, a kind of SF6 gas concentration and oxygen concentration real time and on line monitoring instrument, comprise housing and master control borad (4), has CPU element (5) on the master control borad (4), power supply unit (13), communication unit (11), clock module (6), display unit (7), keyboard input block (8), alarm unit (9) and insulating power supply (12), communication unit (11) is connected with CPU element (5) with insulating power supply (12) by lead respectively, clock module (6), display unit (7), keyboard input block (8) all is connected with CPU element (5) by lead with alarm unit (9), it is characterized in that: also comprise a plurality of SF6 gas concentrations and oxygen concentration combination detector (1), and the SF6 gas concentration is connected with communication unit (11) by order wire (3) with oxygen concentration combination detector (1).
2, SF6 gas concentration according to claim 1 and oxygen concentration combination detector (1) are by SF6 gas concentration test section, the oxygen concentration test section, A/D converter (21), single-chip microcomputer (22), communication module (28), power module (29) and insulating power supply module (30) are formed, SF6 gas concentration test section is by controlled oscillator (14), driving amplifier (15), step-up transformer (16), rectifier filer (17), corona discharge sensor (18) and form with the sampling microwave network (19) of accurate adjustable potentiometer (20), the control end of oscillator (14) is connected with single-chip microcomputer (22), the output terminal of oscillator (14) is connected with the input end of driving amplifier (15), the elementary connection of the output terminal of driving amplifier (15) and step-up transformer (16), the input end of the secondary and rectifier (17) of transformer (16) is connected, the output terminal of rectifier (17) is connected with the input end of corona discharge sensor (18), the output terminal of corona discharge sensor (18) is connected with the input end of sampling microwave network (19), the output terminal of sampling microwave network (19) is connected with a road input end of A/D converter (21), the signal output part of oxygen concentration test section is connected with the b road input end of A/D converter (21), the output terminal of A/D converter (21) links to each other with single-chip microcomputer (22) parallel port, and communication module (28) is connected with single-chip microcomputer 22 serial ports with insulating power supply module (30) by lead.
3, SF6 gas concentration according to claim 2 and oxygen concentration real time and on line monitoring instrument, it is characterized in that: the oxygen concentration test section is by the sampler (26) with accurate adjustable potentiometer (27), boundary current type lambda sensor (23), the voltage source (31) that detects voltage is provided and provides heating power supply and the variable voltage source (24) of band adjustable potentiometer (25) composition, the input end of sampler (26) is connected with the output terminal of boundary current type lambda sensor (23), the output terminal of sampler (26) is connected with the b road input end of A/D converter, the measuring junction of boundary current type lambda sensor (23) is connected with voltage source (31), and the fire end of boundary current type lambda sensor (23) is connected with variable voltage source (24).
4, according to claim 1 or 2 or 3 described SF6 gas concentrations and oxygen concentration real time and on line monitoring instrument, it is characterized in that: the communication unit (11) on the master control borad (4) also is connected with a temperature, humidity combination detector (2) by order wire (3).
5, SF6 gas concentration according to claim 1 and 2 and oxygen concentration real time and on line monitoring instrument is characterized in that: also have fan control unit (10) on the master control borad (4), and fan control unit (10) is connected by lead with CPU element (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02218522 CN2515680Y (en) | 2002-01-22 | 2002-01-22 | Real-time on line monitor for controlling SF6 gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02218522 CN2515680Y (en) | 2002-01-22 | 2002-01-22 | Real-time on line monitor for controlling SF6 gas |
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| CN2515680Y true CN2515680Y (en) | 2002-10-09 |
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| CN 02218522 Expired - Lifetime CN2515680Y (en) | 2002-01-22 | 2002-01-22 | Real-time on line monitor for controlling SF6 gas |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426218A (en) * | 2010-12-03 | 2012-04-25 | 上海市电力公司 | Mobile device and method for automatically detecting harmful gas |
| CN102494857A (en) * | 2011-11-28 | 2012-06-13 | 河南省电力公司周口供电公司 | GIS (Geographic Information System) equipment SF6 gas leakage monitoring automatic venting device |
| CN102636622A (en) * | 2012-04-25 | 2012-08-15 | 山西埃尔气体系统工程有限公司 | Wide-area oxygen concentration measurement method and realization device intelligent wide-area oxygen measurement instrument thereof |
| CN102759464A (en) * | 2011-04-29 | 2012-10-31 | 厦门加华电力科技有限公司 | Gas circulation on-line monitoring method and device for sulfur hexafluoride electrical equipment |
| CN103148988A (en) * | 2013-01-29 | 2013-06-12 | 上海市电力公司 | Handheld receiving device for detecting leakage of sulfur hexafluoride gas and oxygen gas |
| CN104569756A (en) * | 2014-12-29 | 2015-04-29 | 河海大学常州校区 | Switch cabinet partial discharge on-line monitoring system based on electronic nose sensor |
| CN106568901A (en) * | 2016-10-28 | 2017-04-19 | 中国电力科学研究院 | SF6 gas concentration monitoring system and SF6 gas concentration monitoring method |
| CN108426848A (en) * | 2017-12-04 | 2018-08-21 | 河南省计量科学研究院 | The dilution error detection device and its detection method of calibrating gas dilution device based on infra-red gas analyzer |
| WO2023159729A1 (en) * | 2022-02-22 | 2023-08-31 | 安康泰(烟台)生命科学研究院有限公司 | Novel multi-point monitoring device for oxygen concentration in life cabin |
-
2002
- 2002-01-22 CN CN 02218522 patent/CN2515680Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426218A (en) * | 2010-12-03 | 2012-04-25 | 上海市电力公司 | Mobile device and method for automatically detecting harmful gas |
| CN102759464A (en) * | 2011-04-29 | 2012-10-31 | 厦门加华电力科技有限公司 | Gas circulation on-line monitoring method and device for sulfur hexafluoride electrical equipment |
| CN102759464B (en) * | 2011-04-29 | 2016-06-22 | 厦门加华电力科技有限公司 | The method and apparatus of sulfur hexafluoride electrical equipment on-line monitoring gas circulation |
| CN102494857A (en) * | 2011-11-28 | 2012-06-13 | 河南省电力公司周口供电公司 | GIS (Geographic Information System) equipment SF6 gas leakage monitoring automatic venting device |
| CN102636622A (en) * | 2012-04-25 | 2012-08-15 | 山西埃尔气体系统工程有限公司 | Wide-area oxygen concentration measurement method and realization device intelligent wide-area oxygen measurement instrument thereof |
| CN102636622B (en) * | 2012-04-25 | 2014-10-15 | 山西埃尔气体系统工程有限公司 | Wide-area oxygen concentration measurement method and realization device intelligent wide-area oxygen measurement instrument thereof |
| CN103148988A (en) * | 2013-01-29 | 2013-06-12 | 上海市电力公司 | Handheld receiving device for detecting leakage of sulfur hexafluoride gas and oxygen gas |
| CN104569756A (en) * | 2014-12-29 | 2015-04-29 | 河海大学常州校区 | Switch cabinet partial discharge on-line monitoring system based on electronic nose sensor |
| CN104569756B (en) * | 2014-12-29 | 2017-11-28 | 河海大学常州校区 | Switch cabinet partial discharge on-line monitoring system based on electronic nose sensor |
| CN106568901A (en) * | 2016-10-28 | 2017-04-19 | 中国电力科学研究院 | SF6 gas concentration monitoring system and SF6 gas concentration monitoring method |
| CN108426848A (en) * | 2017-12-04 | 2018-08-21 | 河南省计量科学研究院 | The dilution error detection device and its detection method of calibrating gas dilution device based on infra-red gas analyzer |
| WO2023159729A1 (en) * | 2022-02-22 | 2023-08-31 | 安康泰(烟台)生命科学研究院有限公司 | Novel multi-point monitoring device for oxygen concentration in life cabin |
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Expiration termination date: 20120122 Granted publication date: 20021009 |