CN202720170U - Device for detecting carbon monoxide gas in transformer oil - Google Patents
Device for detecting carbon monoxide gas in transformer oil Download PDFInfo
- Publication number
- CN202720170U CN202720170U CN 201220260972 CN201220260972U CN202720170U CN 202720170 U CN202720170 U CN 202720170U CN 201220260972 CN201220260972 CN 201220260972 CN 201220260972 U CN201220260972 U CN 201220260972U CN 202720170 U CN202720170 U CN 202720170U
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- CN
- China
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- silver
- transformer oil
- quartz crystal
- crystal sensor
- carbon monoxide
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- Expired - Fee Related
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Abstract
The utility model discloses a device for detecting carbon monoxide gas in transformer oil, wherein the device is characterized in that two air inlet pipes (1 and 2) are combined into one path and enter into the bottom of a detecting bottle (10) through a drying pipe (5), the detecting bottle (10) is sealed by a rubber plug (8), a silver-plated quartz crystal sensor (6) and an air outlet pipe (9) are inserted into the rubber plug (8), sensitive coating material coated on the silver-plated quartz crystal sensor (6) is quadri-fluoborate-quadri-acetamide compound palladium, carbon monoxide gas molecule can be absorbed by the device with high sensitivity and high selectivity by insertion reaction, the silver-plated quartz crystal sensor (6) is connected with an oscillating circuit (11), and the oscillating circuit (11) is driven by a direct-current power supply (12) and is connected with a frequency counter (13), so that an integrated sensing detecting loop can be formed. The device can be simply and conveniently manufactured, the concentration of the carbon monoxide gas in the transformer oil can be accurately and quickly detected, and the device can be used for online monitoring.
Description
Technical field
The utility model relates to a kind of easy carbon monoxide (CO) gas sensing pick-up unit, and this device can detect the concentration of CO gas in the transformer oil accurately and rapidly, and can be used for on-line monitoring.
Background technology
Transformer is the key equipment of modern power transmission and transformation system, and the fault relationship of in time getting rid of in its operational process national economy.Gases Dissolved in Transformer Oil seriously influences routine use and the maintenance of transformer, the appearance of many faults is directly related with gas componant and concentration in the transformer oil, therefore it being analyzed and monitors is effective ways of forecast and diagnosis transformer initial failure, and one of important indicator wherein is exactly the content of carbon monoxide (CO) gas.The analyzing detecting method of CO mainly contains gas chromatography, infrared spectrum, laser absorption spectrum etc. in the transformer oil at present, these instrument analytical methods are because operation link is many, waste time and energy and be difficult in time monitor the variation of the CO characteristic gas that produces in the transformer oil, thereby be unsuitable for quality to transformer and reduce and carry out early stage prediction.Therefore a kind of low cost, easy and simple to handle need to be found, and the instrument of fast and accurate measurement can be reached.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of easy CO gas pick-up unit, but this device is easy to preparation, easy to operate Reusability, the concentration of CO gas can be in several minutes, detected exactly, and the determination and analysis of transformer oil CO gas can be used for.
In order to achieve the above object, the technical solution adopted in the utility model is: a kind of device that can detect CO gas in the transformer oil, this device comprises two air inlet pipelines and an outlet pipe, described two draft tube are merged into leads up to drying tube and enters and detect bottle, detect the upper rubber stopper seal of using of bottle, be inserted with a silver-plated quartz crystal sensor and described escape pipe in the described rubber plug, being coated in responsive class coating material on the silver-plated quartz crystal sensor and being tetrafluoro closes boric acid-tetrem acid amides and closes palladium, described silver-plated quartz crystal sensor is connected with transistor-transistor-logic (TTL) oscillatory circuit, described oscillatory circuit is driven by direct supply, and be connected with frequency counter, consist of a complete sensing detection loop.It is characterized in that the application of the each several part design of device, silver-plated quartz crystal sensor and have the responsive class coating material tetrafluoro of special adsorption function to close boric acid-tetrem acid amides to carbon monoxide closing the use of palladium.It is to be coated with membrane substance by the absorption of kind more than 30 class coating material is studied the best that draws, and CO is had high sensitivity and wide sensing range, and selectivity, reappearance and reversibility is good, can be applicable to the monitoring of CO in the transformer oil.Find by lot of experimental data, being coated on responsive class coating material tetrafluoro on the silver-plated quartz crystal sensor, to close amount that boric acid-tetrem acid amides closes palladium be detection best results between 10 ~ 80 micrograms time.Whole device is formed by above several assembling parts, and is readily removable except changing, and is easy to carry.Its principle of work is to react by inserting, and CO gas optionally is adsorbed on the class coating material, and the Tiny Mass variation of generation can make the resonance frequency of sensor change, and calculates the concentration of the CO gas in the gas sample of being surveyed with the frequency change value.
In the design of device, but two air inlet pipeline independent switches of nitrogen and CO gas sample, and nitrogen and CO gas sample can alternately enter and detect in the bottle.Nitrogen can make the CO gas desorption that is adsorbed on the described class coating material, makes sensor resonant frequency return to initial value.Whole process exists
5Minute just can finish with interior, just can continue on for subsequently detection next time, so this device can effectively reduce detection time and simplify the operation course.
The beneficial effects of the utility model are can measure accurately, rapidly, continuously the concentration of CO gas, and apparatus structure to be simple, is easy to the portable intelligent transformation.Thereby can be used for the analyzing and testing, on-line monitoring of carbon monoxide in the transformer oil etc.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the schematic diagram of simple and easy CO gas pick-up unit.
Fig. 2 is the graph of relation of frequency change value (representing with Hz) Yu the CO gas corresponding concentration (ppm) of sensor.
1. gas sample draft tube among Fig. 1,2. nitrogen draft tube, 3. gas sample draft tube switch, 4. nitrogen draft tube switch, 5 drying tubes (the anhydrous CaCl of interior filling
2), 6. silver-plated quartz crystal sensor, 7. escape pipe switch, 8. rubber plug, 9. escape pipe 10. detects bottle, 11. oscillatory circuits, 12. direct supplys, 13. frequency counters.
Fig. 2 closes boric acid-tetrem acid amides to the tetrafluoro of 43 micrograms to close palladium and be coated on the silver-plated quartz crystal sensor, can obtain the relation curve of carbon monoxide gas concentration and response frequency changing value by the CO gas that adds standard model, the equation of this curve is:
y?=?1.014?+?2.460x
Y represents the concentration (ppm) of CO gas in the formula, and x represents frequency change value Δ F (Hz).The above-mentioned relation curve is drawn when 25 ℃ of room temperatures.
Embodiment
As shown in fig. 1, two draft tube 1,2 are merged into one the tunnel and detect bottle 10 bottoms through entering behind the drying tube 5, and detecting bottle 10 can be glass system, also can be plastic, big or small desirable 0.5L.Detect on the bottle 10 with rubber plug 8 sealings, be inserted with a silver-plated quartz crystal sensor 6 and escape pipe 9 in the rubber plug 8, silver-plated quartz crystal sensor 6 is connected with oscillatory circuit 11, oscillatory circuit 11 is driven by direct supply 12 and is connected with frequency counter 13, so just is assembled into easily a complete sensing detection loop.Should be mentioned that, silver-plated quartz crystal sensor 6 the above class coating material tetrafluoro close boric acid-tetrem acid amides and close the key substance that palladium is this sensing detection, and it can carry out with sensitivity selective adsorption to CO gas by inserting reaction.Rubber plug 8 with detect bottle 10, escape pipe 9 all is close-connected with rubber plug 8, and is good with this overall tightness that guarantees to detect bottle 10.
The concrete operating process that detects is as follows:
1. opening power at first, make oscillatory circuit 11 starting of oscillations, this moment, frequency counter 13 can demonstrate the frequency of vibration, then opened nitrogen draft tube switch 4 and escape pipe switch 7, treat that its frequency shows and close nitrogen draft tube switch 4 and escape pipe switch 7 when stablizing, record original frequency value F
1
2. then open gas sample draft tube switch 3 and escape pipe switch 7, when treating that frequency counter 13 demonstrations are stablized, close hold one's breath sample draft tube switch 3 and escape pipe switch 7, record frequency value F
2
3. the frequency response values of each gas sample (Δ F, Hz) can be drawn by following formula: Δ F=F
1-F
2, Δ F is updated in the working curve equation of Fig. 2, can calculate the concentration value of CO gas in the gas sample;
4. detect complete after, open escape pipe switch 7 and nitrogen draft tube switch 4, make frequency counter 13 display frequencies return to original frequency value F
1, then close all gas circuits, use in order to detecting next time.
The utility model can be applied to the on-line analysis monitoring of CO gas in the electric power transformer oil.Employed silver-plated quartz crystal sensor has the real-time response performance, can in time reflect the concentration of carbon monoxide in the detected gas sample.As long as gas sample pipeline is connected to the monitoring point, just can reach the purpose of remote monitor.
Claims (4)
1. CO gas pick-up unit in the transformer oil, it is characterized in that: this device is by two draft tube (1,2) be merged into one the tunnel through entering detection bottle (10) bottom behind the drying tube (5), detect bottle (10) upper with rubber plug (8) sealing, be inserted with a silver-plated quartz crystal sensor (6) and escape pipe (9) in the rubber plug (8), silver-plated quartz crystal sensor (6) is connected with oscillatory circuit (11), oscillatory circuit (11) is driven by direct supply (12), and be connected with frequency counter (13), consist of a complete sensing detection loop.
2. CO gas pick-up unit in the transformer oil according to claim 1 is characterized in that: two air inlet pipelines (1,2) can independent gauge tap, and nitrogen and carbon monoxide sample can alternately enter and detect in the bottle (10).
3. CO gas pick-up unit in the transformer oil according to claim 1 is characterized in that: be coated in responsive class coating material on the silver-plated quartz crystal sensor (6) and be tetrafluoro and close boric acid-tetrem acid amides and close palladium.
4. CO gas pick-up unit in the transformer oil according to claim 3 is characterized in that: being coated on responsive class coating material tetrafluoro on the silver-plated quartz crystal sensor (6), to close the amount that boric acid-tetrem acid amides closes palladium be 10 ~ 80 micrograms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220260972 CN202720170U (en) | 2012-06-05 | 2012-06-05 | Device for detecting carbon monoxide gas in transformer oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220260972 CN202720170U (en) | 2012-06-05 | 2012-06-05 | Device for detecting carbon monoxide gas in transformer oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720170U true CN202720170U (en) | 2013-02-06 |
Family
ID=47621992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220260972 Expired - Fee Related CN202720170U (en) | 2012-06-05 | 2012-06-05 | Device for detecting carbon monoxide gas in transformer oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202720170U (en) |
-
2012
- 2012-06-05 CN CN 201220260972 patent/CN202720170U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20140605 |