CN201697907U - Checking apparatus of SF 6 gas leakage monitoring alarm - Google Patents
Checking apparatus of SF 6 gas leakage monitoring alarm Download PDFInfo
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- CN201697907U CN201697907U CN2010202096843U CN201020209684U CN201697907U CN 201697907 U CN201697907 U CN 201697907U CN 2010202096843 U CN2010202096843 U CN 2010202096843U CN 201020209684 U CN201020209684 U CN 201020209684U CN 201697907 U CN201697907 U CN 201697907U
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- mass flowmeter
- solenoid valve
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Abstract
The utility model discloses a checking apparatus of an SF 6 gas leakage monitoring alarm, which includes a precise electron mass flow meter, an electromagnetic valve, an air pump, a pressure controller, a quick coupling, a rotameter, a control unit, a human-computer interface, a flow control valve and connecting pipelines. The checking apparatus of the utility model is used, so that a large amount of SF 6 standard gas and diluted gas steel cylinders are avoided from being brought, and the utility model has the characteristics of simplicity, high speed, accuracy and high degree of automation, thereby providing great convenience for the field checking work of the SF 6 gas leakage monitoring alarm.
Description
Technical field
The utility model relates to a kind of alarm calibration equipment, specifically is a kind of SF
6Gas leakage monitoring alarm calibration equipment.
Background technology
SF
6Gas is the insulating medium of present electric system widespread usage, because its proportion is very big, is deposited on the bottom of air easily, and the personnel that cause easily suffocate because of anoxic; In addition, SF
6Gas can carry out analyte and have severe toxicity, very likely causes serious accident in case take place to leak.Power department is for fear of because of SF
6Gas and decomposed substance thereof cause life to threaten to the field personnel, require to install SF as safe anti-accident measures by force in office work places such as GIS in these several years
6The gas-monitoring alarm, SF in the main testing environment air
6Gas content and oxygen content, SF in surrounding air
6Gas content (the SF that exceeds standard
6When gas concentration＞1000ppm), anoxic (oxygen concentration＜18%), the monitoring alarm instrument can carry out sound and light alarm immediately, takes safety measures to remind the staff; Simultaneously, system starts blower fan automatically and reduces SF in the surrounding air
6Gas content provides a kind of safety precautions of health of human body for the staff.
According to " Measurement Law of the People's Republic of China " the 9th regulation: the monitoring instrument that is used for security protection, environmental monitoring aspect belongs to the compulsory verification measurement instrument, must carry out compulsory verification, and the calibrating check-verifying period was generally 1 year.But because SF
6The verification of gas leakage alarm needs the SF of multiple variable concentrations
6And O
2Calibrating gas, the calibrating gas that carries multiple concentration is extremely inconvenient to the scene, and also unrealistic, this makes power department can't carry out SF
6The field-checking of gas leakage alarm has caused most SF
6The gas leakage alarm often sends the false alarm signal in operational process or device malfunctioningly can't normally move warning; become a kind of ornaments of transformer station; do not have really to play protective effect, buried great potential safety hazard for enterprise produces to health of human body.
Therefore develop a kind of suitable on-the-spot SF that uses
6Gas leakage alarm calibration equipment, significant concerning power department.
The utility model content
The utility model is office work place SF such as solution electric system GIS
6The difficult problem that gas leakage monitoring alarm is difficult to verification provides a kind of SF
6Gas leakage monitoring alarm on-site calibration device and method of calibration.
The technical scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of SF
6Gas leakage monitoring alarm calibration equipment, this device includes: the electron mass flowmeter of three different flows (1,2 and 3), six solenoid valves (10,11,12,13,14 and 15), rapid-acting coupling (20), mini air pump (30), pressure controller (31), gas-holder (32), air purifier (33), verification chamber (80), control module (50), man-machine interface (51), SF
6Standard gas cylinder (70), reduction valve (71) and two spinner-type flowmeters (60 and 61) are formed: described high concentration SF
6Standard gas cylinder (70) respectively with stainless steel or teflon pipeline sealing tandem connects to form gas circuit 1 with electron mass flowmeter (1), electron mass flowmeter (1) with solenoid valve (10) with rapid-acting coupling (20), rapid-acting coupling (20) with reduction valve (71), reduction valve (71); Described electron mass flowmeter (2) connects to form gas circuit 2 with solenoid valve (11) with stainless steel or teflon pipeline sealing tandem; Described mini air pump (30) and gas-holder (32), gas-holder (32) and air purifier (33), air purifier (33) are with solenoid valve (14), connect to form gas circuit 3 with stainless steel or teflon pipeline sealing tandem with solenoid valve (14) and electron mass flowmeter (3), electron mass flowmeter (3) respectively with solenoid valve (12); The two ends of described solenoid valve (15) are tightly connected with stainless steel or teflon pipeline with the inlet end of electron mass flowmeter (1), electron mass flowmeter (2) respectively; The two ends of described solenoid valve (13) are tightly connected with stainless steel or polytetrafluoroethylene tee with the inlet end of electron mass flowmeter (2) and electron mass flowmeter (3) respectively; Described outlet with solenoid valve (10,11 and 12) is tightly connected with stainless steel or teflon four-way, and is tightly connected with spinner-type flowmeter (60) and spinner-type flowmeter (61) entrance point respectively with threeway; Described spinner-type flowmeter (61) outlet is tightly connected with flexible rubber hose with verification chamber (80) import (81); Described man-machine interface (51) is connected with mini air pump (30) with electronic flow-meter (1,2 and 3), solenoid valve (10,11,12,13,14 and 15), pressure controller (31) respectively with signal line passes control module (50) with power lead, and wherein the pressure transducer of pressure controller (31) is embedded in the pipeline of mini air pump (30) outlet side by thread seal.
Beneficial effect of the present utility model is: the utility model has solved office work place SF such as electric system GIS
6The difficult problem that gas leakage monitoring alarm is difficult to verification provides a kind of SF
6Gas leakage monitoring alarm on-site calibration device.Only need carry the SF of one bottle of single concentration
6Calibrating gas mixes with air automatically by calibration equipment, dilutes the various concentration SF for needs
6And O
2Gas is given field-checking SF
6Monitoring alarm instrument provides a kind of compact conformation, technological means easy to carry.
Description of drawings
Fig. 1 is the utility model SF
6Gas leakage monitoring alarm calibration equipment structural representation.
Among the figure, electron mass flowmeter 1,2 and 3, solenoid valve 10,11,12,13,14 and 15, rapid-acting coupling 20, mini air pump 30, pressure controller 31, gas-holder 32, air purifier 33, control module 50, man-machine interface 51, SF
6 Standard gas cylinder 70, reduction valve 71, spinner- type flowmeter 60 and 61, verification chamber 80.
Fig. 2 is the utility model verification chamber 80 synoptic diagram.
Among the figure, air intake opening 81, exhausr port 82.
Embodiment:
Below in conjunction with drawings and Examples the utility model is further described.
Mass rate control method is adopted in the gas preparation of this device, obtain different electric signal thereby the heat of being taken away when gas with various flows through electron mass flowmeter 1,2 with 3 a certain pipeline section is different, by processing to this electric signal, obtain the mass flow rate signal of all gases at last, the control of mass rate then is to pass through and the relatively back controlled signal of standard signal according to the mass flow rate signal that detects, this control signal is used for controlling the solenoid valve aperture of electron mass meter, and control accuracy can reach in 1% (full scale).
As shown in Figure 1, this calibration equipment includes at least as lower member:
1. the electron mass flowmeter 1,2 and 3: by control module 50 controls, stablize SF for system provides on demand
6And air mass flow.
2. control module 50: by with electron mass flowmeter 1,2 and 3, solenoid valve 10,11,12,13,14 and 15, pressure controller 31, the connection of pneumatic pump 30 detects, feedback, calculates, control, shows the various technical parameters of above-mentioned parts.
3. man-machine interface 51 is connected with control module 50, and functions such as parameter typing, demonstration are provided for the man-machine communication.
4. solenoid valve 10,11,12,13,14 and 15 receives the switch off time of control module 50 each gas circuit of instruction control;
5. pressure controller 31 is controlled starting or stoping of pneumatic pump by detecting the gaseous tension of pneumatic pump 30 outlets;
6. pneumatic pump 30 provides pressurized air for system;
7. gas-holder 32 is stored the air of pneumatic pumps 30 compressions, for system provides stable air pressure;
8. air purifier 33 realizations prevent that to the filtration of air impurity from entering electron mass flowmeter 1 and 2.
9. spinner- type flowmeter 60 and 61 is SF
6The detecting device verification work of leakage alarm instrument provides the standard mixture flow that needs.
10. rapid-acting coupling 20 is used for and being connected and cut-offfing control of external perimysium reference gas;
11. verification chamber 80 is alarm SF
6A relative sealed space is created in the verification of sensor and oxygen sensor, and the calibrating gas of constant density is provided;
Mass rate control method is controlled separately each road unstripped gas with the form of mass rate, and the mass rate of each road gas is calculated according to the distribution ratio.Owing to be the control of independent mass rate, thereby the variation of environmental parameters such as pressure and temperature can not exert an influence to gas flow and distribution ratio, can not influence the control of gas flow because of pressure controling precision.Adopt high-precision mass flowmeter, the flow of control diluents and component gas.In order to improve the performance of instrument, guarantee the gas precision preparation, this device adopts the high-precision electronic mass flowmeter, and its control accuracy is less than 1% full scale.20,500 and but the electron mass flowmeter independent assortment of selecting 3 different ranges for use uses (the nitrogen calibrated span is respectively:, 1000ml/min), improved ratio range when can guarantee the highest distribution precision.Adopt 3 electronic flow-meters to form 3 gas passages, but the simulated field actual conditions are allotted the calibrating gas of bi-component.
At SF
6In the calibrating gas dilution, with pure air as diluents, can save carrying of on-the-spot air bottle at device built-in miniature pneumatic pump (30), and job costs have been reduced, be connected with gas-holder (32) and pressure controller (31) in the air system, air strainer (33) has guaranteed the purification of the stable and air of air pressure.Because the pressure that pneumatic pump produces has certain fluctuation, therefore behind pneumatic pump, place gas-holder and detect its internal pressure with pressure transducer, detect the running status of air pump in real time, guarantee that system normally moves.In the gas-holder rear end air cleaning unit is installed, is prevented from the pollution effect of electron mass flowmeter has been improved flow control accuracy.High concentration SF
6It is spirit that calibrating gas adopts nitrogen, and concentration is advisable at 5%-20%, if concentration is too high, will strengthen dilution ratio, and is excessive when dilution ratio, will be difficult to guarantee the precision of distribution; If concentration is too low, dilution ratio is little, obtains higher distribution precision easily, but will consume too many calibrating gas, increases purchase standard SF
6The cost of gas, the while has also reduced the stream time of quantitative criterion gas.
In the oxygen concentration process for preparation, be unstripped gas with the air, contain the oxygen about 21% under the normal condition in the air, when atmospheric pressure changed, oxygen concentration also can change to some extent, and its variable quantity can obtain by measuring the atmospheric pressure data that reads up the literature.In order to save the trouble of carrying steel cylinder, carrier gas adopts SF
6Calibrating gas (nitrogen is spirit) is because of SF
6The alarm set point of gas leakage monitoring alarm is 18%, so the verification scope of oxygen sensor satisfied the request for utilization of alarm fully at 15%--21%, so adopt SF
6Calibrating gas carrier gas consumption is also little.
SF
6The verification of concentration sensor 1500 μ l/1 monitoring points
[delivery rate 1000ml/min, concentration is the SF of 1500 μ l/1
6Gas]
1. open concentration and be 10% SF
6The valve of calibrating gas steel cylinder 70 and rapid-acting coupling 20 variable valve are regulated SF by reduction valve 71
6Gaseous tension is 0.1MPa;
2. at calibration equipment man-machine interface 51 input SF
6The concentration value 10% of calibrating gas, the SF that need prepare
6Gas concentration value 1500 μ l/1 and output stream value 1000ml/min press start key, and mini air pump 30 starts;
3. control module 50 calculates SF according to above-mentioned input value
6With air distribution ratio be 1500 μ l/1: 100000 μ l/1[10%]=3: 200, SF
6The flow that needs separately with air is respectively 15ml/min, 985ml/min, and to select range automatically according to flow size be that the electron mass flowmeter of 20ml/min is as SF
6Passage, selecting range is that the electron mass flowmeter 3 of 1000ml/min is respectively as air duct, send control signal and open solenoid valve 10,12 and 14, close solenoid valve 11,13 and 15, and by the real-time control of the input feedback electron mass flowmeter 1 of electron mass flowmeter 1 and 3 and 3 delivery rate, delivery rate 1000ml/min, concentration are the SF of 1500 μ l/1 after output channel mixes
6Gas;
4. verification chamber (80) are tipped upside down on the SF of alarm
6On the sensor, make that verification chamber (80) is relative with the floor to be sealed, regulate the flow that spinner-type flowmeter 61 valves control verification chamber 80 needs,, can unnecessary gas be drained in the atmosphere by regulating spinner-type flowmeter 60 valves in order to keep the flow that verification needs;
5. keep the regular hour, make the SF in verification chamber 80
6Gas concentration is stable, reads SF on the display screen of alarm
6The concentration displayed value reads the SF of output on the man-machine interface 51 of calibration equipment
6Concentration value by comparing both difference, can be determined the SF of alarm
6Concentration detects error.
The verification of oxygen concentration sensor 15% oxygen concentration monitoring point
[delivery rate 1400ml/min, concentration is 15% oxygen]
1. open concentration and be 10% SF
6The valve of calibrating gas steel cylinder 70 and rapid-acting coupling 20 variable valve are regulated SF by reduction valve 71
6Gaseous tension is 0.1MPa;
2. the oxygen density value 15% and the output stream value 1400ml/min of concentration of oxygen value 21%, needs preparation in calibration equipment man-machine interface 51 input airs press start key, and pneumatic pump 30 starts;
3. control module 50 calculates air and SF according to above-mentioned input value
6The distribution ratio is 15%:21%=5: 7, and SF
6The flow that needs separately with air is respectively 400ml/min, 1000ml/min, and according to SF
6It is the electron mass flowmeter 2 transmission SF of 500ml/min that the size of flow 400ml/min is selected range automatically
6Select the electron mass flowmeter 3 transmission air of 1000ml/min, send control signal and open solenoid valve 11,12,14 and 15, close solenoid valve 10 and 13, and by the real-time control of the input feedback electron mass flowmeter 2 of electron mass flowmeter 2 and 3 and 3 delivery rate, delivery rate 1400ml/min, concentration are 15% oxygen after output channel mixes;
4. verification chamber (80) are tipped upside down on the SF of alarm
6On the sensor, make that verification chamber (80) is relative with the floor to be sealed, regulate the flow that spinner-type flowmeter 61 valves control verification chamber 80 needs,, can unnecessary gas be drained in the atmosphere by regulating spinner-type flowmeter 60 valves in order to keep the flow that verification needs;
5. keep the regular hour, make the oxygen concentration in verification chamber 80 stable, on the display screen of alarm, read the oxygen concentration displayed value, on the man-machine interface 51 of calibration equipment, read the oxygen density value of output, by comparing both difference, can determine that the oxygen concentration of alarm detects error.
Claims (1)
1. SF
6Gas leakage monitoring alarm calibration equipment, it is characterized in that this device includes: the electron mass flowmeter of three different flows (1,2 and 3), six solenoid valves (10,11,12,13,14 and 15), rapid-acting coupling (20), mini air pump (30), pressure controller (31), gas-holder (32), air purifier (33), verification chamber (80), control module (50), man-machine interface (51), SF
6Standard gas cylinder (70), reduction valve (71) and two spinner-type flowmeters (60 and 61) are formed: described high concentration SF
6Standard gas cylinder (70) respectively with stainless steel or teflon pipeline sealing tandem connects to form gas circuit 1 with electron mass flowmeter (1), electron mass flowmeter (1) with solenoid valve (10) with rapid-acting coupling (20), rapid-acting coupling (20) with reduction valve (71), reduction valve (71); Described electron mass flowmeter (2) connects to form gas circuit 2 with solenoid valve (11) with stainless steel or teflon pipeline sealing tandem; Described mini air pump (30) and gas-holder (32), gas-holder (32) and air purifier (33), air purifier (33) are with solenoid valve (14), connect to form gas circuit 3 with stainless steel or teflon pipeline sealing tandem with solenoid valve (14) and electron mass flowmeter (3), electron mass flowmeter (3) respectively with solenoid valve (12); The two ends of described solenoid valve (15) are tightly connected with stainless steel or teflon pipeline with the inlet end of electron mass flowmeter (1), electron mass flowmeter (2) respectively; The two ends of described solenoid valve (13) are tightly connected with stainless steel or polytetrafluoroethylene tee with the inlet end of electron mass flowmeter (2) and electron mass flowmeter (3) respectively; Described outlet with solenoid valve (10,11 and 12) is tightly connected with stainless steel or teflon four-way, and is tightly connected with spinner-type flowmeter (60) and spinner-type flowmeter (61) entrance point respectively with threeway; Described spinner-type flowmeter (61) outlet is tightly connected with flexible rubber hose with verification chamber (80) import (81); Described man-machine interface (51) is connected with mini air pump (30) with electronic flow-meter (1,2 and 3), solenoid valve (10,11,12,13,14 and 15), pressure controller (31) respectively with signal line passes control module (50) with power lead, and wherein the pressure transducer of pressure controller (31) is embedded in the pipeline of mini air pump (30) outlet side by thread seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202096843U CN201697907U (en) | 2010-05-18 | 2010-05-18 | Checking apparatus of SF 6 gas leakage monitoring alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202096843U CN201697907U (en) | 2010-05-18 | 2010-05-18 | Checking apparatus of SF 6 gas leakage monitoring alarm |
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| Publication Number | Publication Date |
|---|---|
| CN201697907U true CN201697907U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202096843U Expired - Lifetime CN201697907U (en) | 2010-05-18 | 2010-05-18 | Checking apparatus of SF 6 gas leakage monitoring alarm |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943691A (en) * | 2010-04-14 | 2011-01-12 | 广西电网公司电力科学研究院 | Device and method for checking SF6 gas leakage monitoring and alarming apparatuses |
| CN102495017A (en) * | 2011-11-09 | 2012-06-13 | 山东惠工电气股份有限公司 | Detecting instrument of sulfur hexafluoride gas decomposition products |
| CN103472193A (en) * | 2013-09-30 | 2013-12-25 | 河南省日立信股份有限公司 | Quick tester for transmitter laboratory |
| CN103558346A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Device for checking sulfur hexafluoride leakage alarm apparatus |
| CN106731936A (en) * | 2017-01-07 | 2017-05-31 | 河南工程学院 | A kind of coal mine underground gas configuration experimental provision for automatically controlling |
| CN111007204A (en) * | 2019-12-23 | 2020-04-14 | 中国人民解放军92609部队 | Gas analysis verification equipment |
-
2010
- 2010-05-18 CN CN2010202096843U patent/CN201697907U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943691A (en) * | 2010-04-14 | 2011-01-12 | 广西电网公司电力科学研究院 | Device and method for checking SF6 gas leakage monitoring and alarming apparatuses |
| CN101943691B (en) * | 2010-04-14 | 2014-03-26 | 广西电网公司电力科学研究院 | Method for checking SF6 gas leakage monitoring and alarming apparatuses |
| CN102495017A (en) * | 2011-11-09 | 2012-06-13 | 山东惠工电气股份有限公司 | Detecting instrument of sulfur hexafluoride gas decomposition products |
| CN103472193A (en) * | 2013-09-30 | 2013-12-25 | 河南省日立信股份有限公司 | Quick tester for transmitter laboratory |
| CN103472193B (en) * | 2013-09-30 | 2015-06-17 | 河南省日立信股份有限公司 | Quick tester for transmitter laboratory |
| CN103558346A (en) * | 2013-11-15 | 2014-02-05 | 国家电网公司 | Device for checking sulfur hexafluoride leakage alarm apparatus |
| CN106731936A (en) * | 2017-01-07 | 2017-05-31 | 河南工程学院 | A kind of coal mine underground gas configuration experimental provision for automatically controlling |
| CN111007204A (en) * | 2019-12-23 | 2020-04-14 | 中国人民解放军92609部队 | Gas analysis verification equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110105 |
|
| CX01 | Expiry of patent term |