CN2881574Y - Neck contracting structure of mercuryless thermometer - Google Patents
Neck contracting structure of mercuryless thermometer Download PDFInfo
- Publication number
- CN2881574Y CN2881574Y CN200620040106.5U CN200620040106U CN2881574Y CN 2881574 Y CN2881574 Y CN 2881574Y CN 200620040106 U CN200620040106 U CN 200620040106U CN 2881574 Y CN2881574 Y CN 2881574Y
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- clinical thermometer
- necking down
- down structure
- thermometer
- mercury
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Abstract
The utility model relates to a neck contracting structure of mercuryless thermometer and is characterized in the following: (1) an arc-shaped plump bubble is formed in a glass capillary and clings the opposite inner wall of the capillary to form an arc-shaped neck contracting structure; (2) the cross section of the glass capillary is of round or ellipse shape; (3) the inner diameter of the glass capillary 0.05mm to 0.10mm. The utility model has the advantages of that the model is convenient to be manufactured, meanwhile, because the manufacturing process is monitored by the supervision of a projection apparatus, the result is that each neck contracting structure of each clinical thermometer is of reliability and unification.
Description
Technical field
The utility model relates to a kind of necking down structure of not having the mercury clinical thermometer, relates to a kind of necking down structure at the no mercury clinical thermometer of making temperature carrier with liquid alloy or rather, belongs to the clinical thermometer field.
Background technology
Mercury,, has been limited to use abroad in the mid-90 in 20th century owing to adopt the bigger mercury of toxicity can endanger environment and human body as the clinical thermometer of temperature carrier.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.
Simultaneously, because the liquid alloy that alternative mercury is used 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 common 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 the gallium/indium/ashbury metal of CN1039162C report does not have the necking down structure, the cross section of its measuring tube and cylinder junction, bottom and internal diameter and the identical (see figure 2) of measuring tube between glass measuring tube and bottom spheroid.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.
In sum, the clinical thermometer of making carrier without mercury is not just simply used liquid alloy temperature carrier.Replace mercury, also must the thin narrow necking down structure of clinical thermometer glass tube lower knuckle be improved, just can satisfy the demands and will make it have practicality.
Summary of the invention
The utility model proposes the new necking down structure of a kind of reliable no mercury clinical thermometer, with the cohesion that adapts to the new liq alloy temperature carrier and the characteristics of adhesive force, easily row is easy to implement.
It is that (internal diameter is about Φ 0.05～0.1mm) and vacuumizes for circular or oval-shaped glass capillary to internal diameter that the utility model is implemented, 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, utilize projector when observing the circular arc bubbling and be close to the opposite inwall of capillary wall, promptly stop heating, make and form a circular arc vesicle (see figure 3) of heaving in the kapillary, 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 essentially identical necking down structure and usability, help guaranteeing not have the quality of mercury clinical thermometer.
This shows that a kind of necking down structure that the utility model provides is a kind of arc necking down structure, the circular arc vesicle of inwardly heaving that forms in this kapillary is close to opposite capillaceous inwall.
This shows, this uses a kind of kapillary arc necking down structure of novel proposition, easy to make, and because of manufacturing process is to monitor under the monitoring of projector, thereby make the special necking down structure of kapillary of each clinical thermometer have high reliability and consistance.
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 the clinical thermometer that Fig. 3 the utility model provides.
The kapillary bubble structure preparation technology synoptic diagram that Fig. 4 the utility model provides.
1. glass capillary inwall bubbling necking downs, 2. projector, 3. coal gas or oxy-acetylene blowtorch among the figure
Embodiment
Getting internal diameter is Φ 0.05-0.08mm 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 thermometer of reliable special necking down structure.
This shows that the necking down structure that the utility model provides ties up to the arc necking down structure in circle or the oval kapillary, the inside circular arc vesicle of heaving that forms in the glass capillary is close to opposite capillaceous inwall (see figure 3).
Claims (3)
1. a necking down structure of not having the mercury clinical thermometer is characterized in that forming the circular arc bubbling in the glass capillary, and the circular arc vesicle of heaving is close to opposite capillaceous inwall, forms arc necking down structure.
2. by the necking down structure of the described no mercury clinical thermometer of claim 1, it is characterized in that described glass capillary internal diameter is for circular or oval.
3. by the necking down structure of the described no mercury clinical thermometer of claim 1, the internal diameter that it is characterized in that glass capillary is 0.05-0.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620040106.5U CN2881574Y (en) | 2006-03-10 | 2006-03-10 | Neck contracting structure of mercuryless thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620040106.5U CN2881574Y (en) | 2006-03-10 | 2006-03-10 | Neck contracting structure of mercuryless thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2881574Y true CN2881574Y (en) | 2007-03-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200620040106.5U Expired - Lifetime CN2881574Y (en) | 2006-03-10 | 2006-03-10 | Neck contracting structure of mercuryless thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2881574Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2006
- 2006-03-10 CN CN200620040106.5U patent/CN2881574Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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: 20070321 |
|
| EXPY | Termination of patent right or utility model |