CN102087146B - Temperature sensing medium for all-liquid type temperature meter and filling method thereof - Google Patents
Temperature sensing medium for all-liquid type temperature meter and filling method thereof Download PDFInfo
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- CN102087146B CN102087146B CN2010105649496A CN201010564949A CN102087146B CN 102087146 B CN102087146 B CN 102087146B CN 2010105649496 A CN2010105649496 A CN 2010105649496A CN 201010564949 A CN201010564949 A CN 201010564949A CN 102087146 B CN102087146 B CN 102087146B
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Abstract
The invention relates to a temperature sensing medium, in particular to a temperature sensing medium for an all-liquid type temperature meter used for measuring oil surface temperature and winding temperature on large and medium transformers, belonging to the technical field of organic polymers. The temperature sensing medium for the all-liquid type temperature meter is MDnM silicone oil. Preferably, the temperature sensing medium is dimethyl silicon oil. By using silicone oil to replace dimethylbenzene and jet fuel, the temperature sensing medium for the all-liquid type temperature meter has the advantages of no taste, no color and no toxin; the flashing point is high (more than 120 DEG C), 25 DEG C for dimethylbenzene, and 38 DEG C for jet fuel; and the temperature sensing medium is not easy to volatilize, has good stability and can overcome the defects of the original temperature sensing liquid. Through detection, the accuracy of the all-liquid type temperature meter using the dimethyl silicon oil as the temperature sensing medium can reach 1.0 grade, the time constant is smaller than 20 s, and the temperature measurement range can reach -40 to 300 DEG C.
Description
Technical field
The invention belongs to the organic polymer technical field, relate to a kind of temperature sensing medium, specifically be used for measuring on the large and medium-sized transformer temperature sensing medium of the full-liquid type thermometer of pasta temperature and winding temperature.
Background technology
On large and medium-sized transformer, measure the full-liquid type thermometer of pasta temperature and winding temperature, its temperature-measurement principle is in its airtight temp measuring system, to be full of temperature sensing liquid, when temperature rises or descend, utilizes the principle of the expanding with heat and contract with cold measurement temperature of liquid.The temperature sensing liquid that present production full-liquid type thermometer is adopted is xylene and jet fuel.And xylene is moderately toxic liquid, and doing temperature sensing liquid with it has corrosive attack to parts, directly has influence on the serviceable life of instrument, again owing to poisonous, pays attention to today of environmental protection in the whole society, and is obviously not too suitable.Jet fuel is owing to be volatile, and flash-point is low, and inflammable liquid is done temperature sensing medium with it, and is very high with the requirement meeting of the temp measuring system of full-liquid type thermometer, so that chronic seepage phenomenon is serious, directly has influence on the functional reliability of instrument.For reaching present environmental requirement, be badly in need of a kind of temperature sensing medium of measuring the full-liquid type thermometer of pasta temperature and winding temperature on the large and medium-sized transformer that is applicable to.
Summary of the invention
The present invention is directed to the poisonous and corrosive defective of existing temperature sensing medium a kind of temperature sensing medium that is used for the full-liquid type thermometer is provided, nontoxic, the non-corrosiveness of this temperature sensing medium, flash-point is high, and is not volatile, good stability.
Another object of the present invention also provides the filling and pouring method of described temperature sensing medium.
Above-mentioned technical matters of the present invention is able to implement through following technical scheme: a kind of temperature sensing medium that is used for the full-liquid type thermometer, described temperature sensing medium are MDnM type silicone oil.
As preferably, described temperature sensing medium is a dimethyl silicon oil.
Temperature sensing medium dimethyl silicon oil of the present invention is to be processed by following method: 1:1-2 adds the compound that octamethylcy-clotetrasiloxane (D4) and HMDO (MM) are made in molar ratio; The 3%-5% concentrated sulphuric acid that adds the material gross mass is made catalyzer, adds distilled water after stirring 3 hours at 30-40 ℃ and stirs and be warmed up to 65-70 ℃ in 30 minutes and continue to stir static layering 30 minutes again; Get oil reservoir; Oil reservoir use massfraction as in the aqueous sodium carbonate of 5-6% with remaining sulfuric acid, water is washed till neutrality again, removes by filter low-boiling-point substance; Activated carbon decolorizing is used in the cooling back, obtains water white liquid silicone oil.
As preferably, the addition of activated charcoal is the 2-3% of oil reservoir gross mass.
A kind of filling and pouring method of described temperature sensing medium vacuumizes the thermometric assembly earlier, utilizes the hydraulic pump pressurization to charge then.Be specially: earlier the thermometric assembly is vacuumized; When the vacuum tightness of thermometric assembly reach-when 0.099MPa is above; Use fluid filling pump that temperature sensing medium is circulated in the whole thermometric assembly through thermometer bulb, charge in the process pressure and remain in the 0.3-0.5MPa scope and finish until charging.
The filling device that above-mentioned filling and pouring method adopts; Comprise silicone oil groove, vacuum pump, fluid filling pump, precision pressure gauge and precision pressure meter valve; The silicone oil groove that wherein fills temperature sensing medium of the present invention links to each other with fluid filling pump; Be provided with tensimeter, liquid feeding valve, interface and vacuum valve between fluid filling pump and the vacuum pump successively, interface links to each other with the thermometer bulb of thermometric assembly, and precision pressure gauge links to each other with vacuum pump; Be provided with precision pressure meter valve, interface, vacuum valve between precision pressure gauge and the vacuum pump successively, interface links to each other with the flexible member of thermometric assembly.
In sum, has following advantage with the alternative xylene of MDnM type silicone oil, jet fuel as the temperature sensing medium of full-liquid type thermometer: tasteless, colourless, nontoxic; Flash-point high (more than 120 ℃), 25 ℃ of xylene, 38 ℃ of jet fuels; Not volatile, good stability can overcome the defective that original temperature sensing liquid exists.The full-liquid type thermometer of doing temperature sensing medium with dimethyl silicon oil of the present invention is through detecting, and precision can reach 1.0 grades, and time constant was less than 20 seconds, and the thermometric measurement range can reach-40～300 ℃.
Description of drawings
Fig. 1 is a kind of structural representation of temperature sensing medium filling device of the present invention.
Label declaration: 1 silicone oil groove, 2 fluid filling pumps, 3 tensimeters, 4 liquid feeding valves, 5 interfaces, 6 vacuum valves, 7 vacuum pumps, 8 vacuum valves, 9 interfaces, 10 precision pressure meter valves, 11 precision pressure gauges, 12 thermometric assemblies, 13 thermometer bulbs, 14 flexible members.
Embodiment
It below is specific embodiment of the present invention; These embodiment can do further to replenish and explanation to the present invention; But the present invention is not limited to these embodiment.
Employed technology in following examples unless stated otherwise, is routine techniques known to those skilled in the art; Employed instrument and equipment, reagent etc., only this instructions specifies, what the research that is this area and technician can be through public approach acquisitions.
The concentrated sulphuric acid that following examples adopt is the sulfuric acid solution of massfraction 98%.
Embodiment 1:
1:1 adds the compound that octamethylcy-clotetrasiloxane (D4) and HMDO (MM) are made in molar ratio; 3% concentrated sulphuric acid that adds the material gross mass is made catalyzer, adds distilled water after stirring 3 hours at 30 ℃ and stirs and be warmed up to 65 ℃ in 30 minutes and continue to stir static layering 30 minutes again; Get oil reservoir; Oil reservoir use massfraction be in 6% the aqueous sodium carbonate with remaining sulfuric acid, water is washed till neutrality again, removes by filter low-boiling-point substance; Activated carbon decolorizing is used in the cooling back, obtains water white liquid silicone oil.The addition of activated charcoal is 3% of an oil reservoir gross mass.
Embodiment 2:
1:2 adds the compound that octamethylcy-clotetrasiloxane (D4) and HMDO (MM) are made in molar ratio; The concentrated sulphuric acid that adds material gross mass 5% is made catalyzer, adds distilled water after stirring 3 hours at 30 ℃ and stirs and be warmed up to 70 ℃ in 30 minutes and continue to stir static layering 30 minutes again; Get oil reservoir; Oil reservoir use massfraction be in 5% the aqueous sodium carbonate with remaining sulfuric acid, water is washed till neutrality again, removes by filter low-boiling-point substance; Activated carbon decolorizing is used in the cooling back, obtains water white liquid silicone oil.The addition of activated charcoal is 2% of an oil reservoir gross mass.
Embodiment 3:
1:1 adds the compound that octamethylcy-clotetrasiloxane (D4) and HMDO (MM) are made in molar ratio; The concentrated sulphuric acid that adds material gross mass 4% is made catalyzer, adds distilled water after stirring 3 hours at 30 ℃ and stirs and be warmed up to 70 ℃ in 30 minutes and continue to stir static layering 30 minutes again; Get oil reservoir; Oil reservoir use massfraction be in 5% the aqueous sodium carbonate with remaining sulfuric acid, water is washed till neutrality again, removes by filter low-boiling-point substance; Activated carbon decolorizing is used in the cooling back, obtains water white liquid silicone oil.The addition of activated charcoal is 2% of an oil reservoir gross mass.
Embodiment 4:
Full-liquid type thermometer temperature sensing medium charges, and is the critical process of making the full-liquid type thermometer.Direct relation instrument quality.The present invention is with the filling and pouring method of " vacuum+hydraulic pump pressurization " for this reason; Filling device is as shown in Figure 1; Mainly form by silicone oil groove 1, vacuum pump 7, fluid filling pump 2, precision pressure gauge 11 and precision pressure meter valve 10; The silicone oil groove 1 that wherein fills the liquid silicone oil that the present invention makes links to each other with fluid filling pump 2; Be provided with tensimeter 3, liquid feeding valve 4, interface 5 and vacuum valve 6 between fluid filling pump 2 and the vacuum pump 7 successively, interface 5 links to each other with the thermometer bulb 13 of thermometric assembly 12, and precision pressure gauge 11 links to each other with vacuum pump 7; Be provided with precision pressure meter valve 10, interface 9, vacuum valve 8 between precision pressure gauge 11 and the vacuum pump 7 successively, interface 9 links to each other with the flexible member 14 of thermometric assembly 12.It is following to charge process:
The first-selected vacuum pump 7 that starts; Open vacuum valve 6, vacuum valve 8 and precision pressure gauge 11, thermometric assembly 12 vacuumized, when thermometric assembly vacuum tightness reach-when 0.099MPa is above; Close vacuum valve 6, vacuum valve 8 and precision pressure gauge 11 respectively; Open liquid feeding valve 4, use fluid filling pump 2 that silicone oil is circulated in the whole thermometric assembly through thermometer bulb 13, charging keep-ups pressure in the process finishes to charging in the 0.3-0.5MPa scope.
The silicone oil that above embodiment makes is tasteless, colourless, nontoxic; Flash-point is up to more than 120 ℃; Not volatile, good stability can overcome the defective that original temperature sensing liquid exists.The full-liquid type thermometer of doing temperature sensing medium with dimethyl silicon oil of the present invention is through detecting, and precision can reach 1.0 grades, and time constant was less than 20 seconds, and the thermometric measurement range can reach-40～300 ℃.
Specific embodiment described in the present invention only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.Although the present invention has been made detailed explanation and has quoted some instantiations as proof, to those skilled in the art, only otherwise leave that the spirit and scope of the present invention can be done various variations or correction is obvious.
Claims (2)
1. temperature sensing medium that is used for the full-liquid type thermometer; It is characterized in that: described temperature sensing medium is a dimethyl silicon oil, and it is to be processed by following method: 1:1-2 adds the compound that octamethylcy-clotetrasiloxane (D4) and HMDO (MM) are made in molar ratio, and the 3%-5% concentrated sulphuric acid that adds the material gross mass is made catalyzer; Adding distilled water after stirring 3 hours at 30-40 ℃ stirs and was warmed up to 65-70 ℃ in 30 minutes and continues to stir 30 minutes again; Static layering is got oil reservoir, oil reservoir use massfraction as in the aqueous sodium carbonate of 5-6% with remaining sulfuric acid; Water is washed till neutrality again; Filter, activated carbon decolorizing is used in the cooling back, obtains water white liquid silicone oil.
2. temperature sensing medium according to claim 1 is characterized in that: the addition of activated charcoal is the 2-3% of oil reservoir gross mass.
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| CN2010105649496A CN102087146B (en) | 2010-11-30 | 2010-11-30 | Temperature sensing medium for all-liquid type temperature meter and filling method thereof |
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| CN2010105649496A CN102087146B (en) | 2010-11-30 | 2010-11-30 | Temperature sensing medium for all-liquid type temperature meter and filling method thereof |
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| CN102087146B true CN102087146B (en) | 2012-03-28 |
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| CN103592041A (en) * | 2013-11-11 | 2014-02-19 | 田艳梅 | Filling medium for thermometer |
| CN111256853A (en) * | 2020-02-27 | 2020-06-09 | 明光旭升科技有限公司 | Automatic filling device for temperature sensor production and filling method thereof |
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| CN101649047A (en) * | 2008-08-14 | 2010-02-17 | 扬州宏远化工新材料有限公司 | Simethicone |
| CN101787131A (en) * | 2010-02-10 | 2010-07-28 | 山东东岳有机硅材料有限公司 | Method for preparation of silicon oil by silicon oil byproduct |
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