CN1818576A - Production of non-mercury clinical thermometer and liquid alloy temperature carrier therefor - Google Patents
Production of non-mercury clinical thermometer and liquid alloy temperature carrier therefor Download PDFInfo
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- CN1818576A CN1818576A CN200610024617.2A CN200610024617A CN1818576A CN 1818576 A CN1818576 A CN 1818576A CN 200610024617 A CN200610024617 A CN 200610024617A CN 1818576 A CN1818576 A CN 1818576A
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Abstract
A liquid-alloy temperature carrier used in thermometer of mercury free type is featured as applying low melting point of Ga-In-Sn-K-Na-Li alloy as stabilized liquid temperature carrier at temperature of 5-42DEG C; preparing said alloy by wt% as Ga of 65-80, In of 3-20,Sn of 1-15, Na and K of 0.001-5 and Li of 2.0; applying Na-K weight ratio as 21.6:78.4. The method for preparing said thermometer is also disclosed.
Description
Technical field
The present invention relates to a kind of do not have the liquid alloy temperature carrier that the mercury clinical thermometer uses and the preparation method of clinical thermometer, belong to the clinical thermometer field.
Background technology
Mercury is as the clinical thermometer of temperature carrier, owing to adopt the bigger mercury of toxicity can endanger environment and human body, mouthful outer being limited used.No mercury clinical thermometer is with a wide range of applications.
All be devoted to the no mercury clinical thermometer of exploitation now both at home and abroad, but the liquid alloy carrier that can effectively replace mercury is a major technology key.Patent CN1039162C has proposed a kind of Ga65-95 of containing, In5-22, Sn0-11, Sb0-2, the liquid alloy temperature carrier of Bi0-2, it is Ga50-67 that patent CN1142415C proposes a kind of composition (wt%), In23-30, Sn6-16, Cs0.01-10, Rb0.01-10, the low solution body alloy altogether of Zn0.5-5 can be used as the clinical thermometer temperature carrier.Their fusing point is lower, can replace mercury under certain condition.But they keep liquid stability still to dislike not enough.When temperature lower (as being lower than 5 ℃) or composition fluctuation, be easy to generate deviation and crystallization, liquid is the thickness state, influences the temperature measuring of temperature carrier.On the other hand, expensive In too high levels in these described alloys, what have also contains precious metals such as Cs, Rb, and this causes the liquid alloy selling at exorbitant prices, influences the cost of clinical thermometer, becomes the serious restraining factors that no mercury clinical thermometer is applied.
In addition, because liquid alloy is different with the mercury surface tension, the absorption affinity of they and glass tube walls is also obviously greater than the absorption affinity of mercury and tube wall, therefore the necking down structure of mercury clinical thermometer glass tube is difficult to reply after measurement for the clinical thermometer alloy of new liquid alloy, influences the body fluid alloy by the mobile (see figure 1) of necking down structure easy on and off.
The clinical thermometer of gallium/indium of patent CN1039162C/ashbury metal does not have the necking down structure between glass measuring tube and bottom spheroid, the cross section of its measuring tube and spheroid connecting portion and internal diameter and the identical (see figure 2) of measuring tube.This application proposes to impose the water coating in measuring tube, and makes the method for liquid alloy low-level oxidation, relies on this liquid alloy and measuring tube that bigger clinging power is arranged, and the alloy fluid column is disconnected after measurement.In fact, this method is to be difficult to control and enforcement, and its reliability and repeatability are also relatively poor.
This shows that no mercury clinical thermometer also must be improved the necking down structure of clinical thermometer outside not only needing to consider nontoxic on the carrier but also needing to consider that cost can not be too high, just can satisfy the demand.
Summary of the invention
At the existing problem and shortage of existing report.The present invention's plan is improved the non-toxic aq alloy temperature carrier component of no mercury thermometer and the necking down structure of clinical thermometer has been made significant improvement.Adjustment of the present invention and improved component and composition range as the liquid alloy of temperature carrier, not only reduced the content of expensive In, and to have added the weight ratio of components be 21.6: 78.4, fusing point is-12.63 ℃ Na-K liquid alloy and a spot of metal Li, can obviously improve the low-temperature stability of liquid alloy, can under nearly 0 ℃ low temperature, keep steady state (SS), and can reduce the cost of liquid alloy significantly, can replace mercury better, satisfy the requirement of promoting the use of of no mercury clinical thermometer.
The fluid temperature alloy carrier that no mercury clinical thermometer provided by the invention is used is a kind of low melting point gallium indium tin potassium sodium lithium (CaInSnKNaLi) alloy, it can replace mercury, and avirulence, the temperature carrier of the thermometer that can serve as a model (5～42 ℃) and other thermometric instrument.
Composition (wt%) scope of the liquid alloy temperature carrier gallium indium tin potassium sodium lithium alloy that novel clinical thermometer provided by the invention is used is: Ga:65-80, In:3-20, Sn:1-15, Na and K:0.001-5, Li:0.001-2.0; The Na-K weight ratio is 21.6: 78.4, and it keeps stable low-melting alloy in 5～42 ℃ of scopes.
This alloy is pressed component ratio under vacuum state, or heats under the inert gas shielding of Ar gas, and glass melting temperature is 300～350 ℃, produces silvery white alloy after filtration.
The characteristics of this liquid alloy are: can keep stable liquid down at 3～42 ℃, can not separate out the solid precipitated phase from liquid alloy.
The present invention proposes and has designed the characteristics that adapt to new liq alloy cohesion and adhesive force simultaneously, easily row is easy to implement, service-strong does not have mercury clinical thermometer new necking down structure and method for making, promptly (internal diameter is about Φ 0.05～0.1mm) and vacuumizes for circular or oval-shaped glass capillary to internal diameter, intend the tiny area of bottleneck with the most advanced and sophisticated heated capillary of flames such as coal gas or oxy-acetylene blowtorch, this some place glass is subjected to thermal softening, under the atmospheric pressure effect, kapillary glass inwall is bubbling in pipe, form inside circular arc bubbling in the kapillary, when utilizing projector to observe the circular arc bubbling to be close to the opposite walls of capillary wall, promptly stop to form in the heated capillary circular arc vesicle (see figure 3) of heaving, the arc necking down structure of Xing Chenging like this, both help liquid alloy and varied with temperature current downflow, being convenient to measure the back liquid alloy at thermometer again disconnects at the vesicle bottleneck, and can accomplish at an easy rate that under the monitoring of projector every clinical thermometer has basic identical ground necking down structure and usability, helps guaranteeing not have the quality of mercury clinical thermometer.The enlargement factor of projector is 100 times.
Characteristics of the present invention are conspicuous:
(1) with the liquid alloy temperature carrier that does not contain the mercury composition, replace mercury temperature carrier commonly used, and the cost of described liquid alloy temperature carrier is lower than the no mercury temperature carrier of report again; And can under 5～42 ℃ of temperature, keep better liquid stabilising.
(2) designed a kind of necking down structure, not only easy to make but also practical.
Description of drawings
The necking down structure of the common mercury clinical thermometer glass capillary of Fig. 1.
Glass capillary does not have the necking down structure in the described clinical thermometer of Fig. 2 CN1031962C.
Glass capillary bubble type necking down structural representation (front and side) in Fig. 3 clinical thermometer provided by the invention.
Fig. 4 kapillary bubble structure provided by the invention preparation technology synoptic diagram.
1. glass capillary inwall bubbling necking downs, 2. projector, 3. coal gas or oxy-acetylene blowtorch among the figure
Embodiment
Below by the specific embodiment introduction, further set forth substantive distinguishing features of the present invention and obvious improvement.
Under the Ar gas shiled or vacuum state heating found gallium indium tin potassium sodium lithium alloy, produce silvery white liquid alloy after filtration, stand-by.
Getting internal diameter is Φ 0.06mm glass capillary, and its inwall is evacuated to 10
-2Atmospheric pressure is intended necking down position tiny area heated capillary with gas burner flame tip to kapillary, makes its inwall soften bubbling, observe and control bubbling size with the projector that amplifies 100 times, when the vesicle drum to the opposite tube wall, promptly stop to heat.Guarantee that kapillary forms the necking down structure of little blister.
Use lamp worker technology that the spherical cylinder of kapillary necking part lower end and glass is linked to each other, constitute the glass tube base substrate of clinical thermometer one end opening.
Under high vacuum (10
-6Atmospheric pressure) utilize the pressure differential filling liquid alloy of liquid alloy and vacuum to the clinical thermometer glass tube.The spheroid that clinical thermometer has been irritated liquid alloy places the water of 10 ℃ and 42 ℃ respectively, demarcate the temperature mark of fluid column, and with the sealing of clinical thermometer kapillary upper, open end, promptly make the nontoxic new liquid alloy of no mercury and do temperature carrier, have the clinical thermometer of reliable special necking down structure.
The component of obtained liquid alloy is (wt%): Ga 75 in the present embodiment, and In 15, and Sn 5, and Na-K 4.0, and Li 1.0.
The weight percent of described liquid alloy temperature carrier consists of Ga 65, and In 20, and Sn 11, and Na-K 3.5, and Li 0.5.The glass capillary diameter is 0.05mm, and all the other are with embodiment 1.
The weight percent component of liquid alloy temperature carrier is Ga 70, and In 15, and Sn 13.95, and Na-K 1, and Li 0.05.The glass capillary diameter is 0.08mm, and all the other are with embodiment 1.
Claims (8)
1. one kind is not had the liquid alloy temperature carrier that the mercury clinical thermometer is used, and it is characterized in that being a kind of low melting point gallium indium tin potassium sodium lithium alloys at 5～42 ℃ of maintenance stable liquids, and the weight percent component is Ga:65-80, In:3-20, Sn:1-15, Na and K:0.001-5, Li:0.001-2.0; The Na-K weight ratio is 21.6: 78.4.
2. the liquid alloy temperature carrier of using by the described no mercury clinical thermometer of claim 1 is characterized in that the percentage by weight of alloy preparation consists of Ga 75, and In 15, and Sn 5, and Na-K 4.0, and Li 1.0.
3. the liquid alloy temperature carrier of using by the described no mercury clinical thermometer of claim 1 is characterized in that the percentage by weight of described alloy consists of Ga 65, and In 20, Sn11, and Na-K 3.5, and Li 0.5.
4. the liquid alloy temperature carrier of using by the described no mercury clinical thermometer of claim 1 is characterized in that the percentage by weight of described alloy consists of Ga 70, and In 15, Sn13.95, and Na-K1, Li 0.05.
5. the method for preparing the clinical thermometer of fluid temperature carrier as claimed in claim 1 or 2, its feature is being that preparation process is:
(a) under the Ar gas shiled or vacuum state heating found gallium indium tin potassium sodium lithium alloy, produce silvery white liquid alloy after filtration, glass melting temperature is 300～350 ℃;
(b) getting internal diameter is Φ 0.05～0.1mm glass capillary, and its inwall is evacuated to 10
-2Atmospheric pressure is intended necking down position tiny area heated capillary with coal gas or oxy-acetylene torch flame tip to kapillary, makes its inwall soften bubbling, observe and control bubbling size with projector, when the vesicle drum to the opposite tube wall, promptly stop to heat.Guarantee that kapillary forms the necking down structure of arc;
(c) use lamp worker technology that the spherical cylinder of kapillary necking part lower end and glass is linked to each other, constitute the glass tube base substrate of clinical thermometer one end opening;
(d) 10
-6The pressure differential filling liquid alloy that utilizes liquid alloy and vacuum under the atmospheric pressure high vacuum is to the clinical thermometer glass tube.The spheroid that clinical thermometer has been irritated liquid alloy places the water of 10 ℃ and 42 ℃ respectively, demarcate the temperature mark of fluid column, and with the sealing of clinical thermometer kapillary upper, open end, promptly make no quicksilver water body alloy and do temperature carrier, have the clinical thermometer of arc necking down structure.
6. by the preparation method of the clinical thermometer of the described fluid temperature carrier of claim 5, it is characterized in that the arc vesicle is close to opposite capillaceous inwall.
7. press the preparation method of the clinical thermometer of the described fluid temperature carrier of claim 5, it is characterized in that the glass capillary internal diameter is for circular or oval.
8. press the preparation method of the clinical thermometer of the described fluid temperature carrier of claim 5, enlargement factor is 100 times when it is characterized in that the projector observation.
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| CNB2006100246172A CN100368784C (en) | 2006-03-10 | 2006-03-10 | Production of non-mercury clinical thermometer and liquid alloy temperature carrier therefor |
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| CNB2006100246172A CN100368784C (en) | 2006-03-10 | 2006-03-10 | Production of non-mercury clinical thermometer and liquid alloy temperature carrier therefor |
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| CN100368784C CN100368784C (en) | 2008-02-13 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100516796C (en) * | 2007-10-24 | 2009-07-22 | 江阴职业技术学院 | Thermometer reference graduation automatic calibration and reticule device |
| CN100534639C (en) * | 2007-10-24 | 2009-09-02 | 江阴职业技术学院 | Thermometer automatic classification sorting device |
| WO2010127567A1 (en) * | 2009-05-06 | 2010-11-11 | 无锡市医用仪表厂 | A gallium alloy temperature-sensitive fluid for use in thermometers |
| CN103134603A (en) * | 2013-02-21 | 2013-06-05 | 徐学海 | Mercury-free clinical thermometer and production method thereof |
| CN104117780A (en) * | 2013-04-27 | 2014-10-29 | 中国石油天然气股份有限公司 | Repairing process of chromium-molybdenum steel tube bundle and tube plate |
| CN104711470A (en) * | 2013-12-11 | 2015-06-17 | 杭州龙灿液态金属科技有限公司 | Room temperature gallium-based liquid alloy |
| CN105973489A (en) * | 2016-07-21 | 2016-09-28 | 深圳市大材液态金属科技有限公司 | Low-surface-adhesion liquid metal and application of low-surface-adhesion liquid metal in thermometer |
| CN110987208A (en) * | 2019-12-10 | 2020-04-10 | 安徽方达药械股份有限公司 | Core pinching device for thermometer production |
| CN114518177A (en) * | 2022-02-14 | 2022-05-20 | 四川大学 | Glass thermometer based on eutectic composition of ionic liquid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4227434C2 (en) * | 1992-08-19 | 1994-08-18 | Geraberger Thermometerwerk Gmb | thermometer |
-
2006
- 2006-03-10 CN CNB2006100246172A patent/CN100368784C/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100516796C (en) * | 2007-10-24 | 2009-07-22 | 江阴职业技术学院 | Thermometer reference graduation automatic calibration and reticule device |
| CN100534639C (en) * | 2007-10-24 | 2009-09-02 | 江阴职业技术学院 | Thermometer automatic classification sorting device |
| WO2010127567A1 (en) * | 2009-05-06 | 2010-11-11 | 无锡市医用仪表厂 | A gallium alloy temperature-sensitive fluid for use in thermometers |
| CN103134603B (en) * | 2013-02-21 | 2015-06-24 | 徐学海 | Mercury-free clinical thermometer and production method thereof |
| CN103134603A (en) * | 2013-02-21 | 2013-06-05 | 徐学海 | Mercury-free clinical thermometer and production method thereof |
| CN104117780A (en) * | 2013-04-27 | 2014-10-29 | 中国石油天然气股份有限公司 | Repairing process of chromium-molybdenum steel tube bundle and tube plate |
| CN104117780B (en) * | 2013-04-27 | 2016-10-19 | 中国石油天然气股份有限公司 | A kind of chrome-molybdenum steel tube bank and tube sheet maintenance process |
| CN104711470A (en) * | 2013-12-11 | 2015-06-17 | 杭州龙灿液态金属科技有限公司 | Room temperature gallium-based liquid alloy |
| CN105973489A (en) * | 2016-07-21 | 2016-09-28 | 深圳市大材液态金属科技有限公司 | Low-surface-adhesion liquid metal and application of low-surface-adhesion liquid metal in thermometer |
| CN110987208A (en) * | 2019-12-10 | 2020-04-10 | 安徽方达药械股份有限公司 | Core pinching device for thermometer production |
| CN110987208B (en) * | 2019-12-10 | 2020-11-24 | 安徽方达药械股份有限公司 | Core pinching device for thermometer production |
| CN114518177A (en) * | 2022-02-14 | 2022-05-20 | 四川大学 | Glass thermometer based on eutectic composition of ionic liquid |
| CN114518177B (en) * | 2022-02-14 | 2022-08-02 | 四川大学 | Glass thermometer based on eutectic composition of ionic liquid |
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|---|---|
| CN100368784C (en) | 2008-02-13 |
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Owner name: DONG-E E-JIAO E-HUA MEDICAL EQUIPMENT CO., LTD. Effective date: 20120817 |
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Effective date of registration: 20120817 Address after: 252201 No. 29 Xiangjiang Road, Dong'e County, Shandong, Liaocheng Patentee after: Donge Ejiao Ehua Medical Equipment Co., Ltd. Address before: 252201, Shandong County, Dong'e Province, chat slippery South Road Patentee before: Wang Weijian |
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Address after: 252201 No. 29 Xiangjiang Road, Dong'e County, Shandong, Liaocheng Patentee after: Dong'e A Hua Medical Technology Co., Ltd. Address before: 252201 No. 29 Xiangjiang Road, Dong'e County, Shandong, Liaocheng Patentee before: Donge Ejiao Ehua Medical Equipment Co., Ltd. |