CN201331864Y - Thermal expansion and contraction demonstration apparatus - Google Patents
Thermal expansion and contraction demonstration apparatus Download PDFInfo
- Publication number
- CN201331864Y CN201331864Y CNU2009200177542U CN200920017754U CN201331864Y CN 201331864 Y CN201331864 Y CN 201331864Y CN U2009200177542 U CNU2009200177542 U CN U2009200177542U CN 200920017754 U CN200920017754 U CN 200920017754U CN 201331864 Y CN201331864 Y CN 201331864Y
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- China
- Prior art keywords
- lead
- type pipe
- pilot lamp
- liquid
- conducting liquid
- Prior art date
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Abstract
The utility model relates to a thermal expansion and contraction demonstration apparatus, which comprises a support; a flask and a U-shaped tube are disposed on the support; the flask and the U-shaped tube are connected by a tube connector; the U-shaped tube contains conducting liquid; a first lead, a second lead and a third lead are disposed in the U-shaped tube, wire, one end of the first lead and the third lead are positioned inside the conducting liquid, while one end of the second lead is positioned above the conducting liquid level; a power supply and a first indicator lamp are in serial connection between the other end of the first lead and the other end of the second lead; the other end of the third lead is connected with the node of the power supply and the first indicator lamp through a second indicator lamp. The utility model demonstrates the thermal expansion and contraction principle by the lighting-up and extinction of the first and second indicator lamp visually, achieves the effect of easily understood and impressive.
Description
Technical field
The utility model relates to a kind of teaching aid, specifically, relates to a kind of demonstrating expansion on heating and contraction on cooling device.
Background technology
At present, when the explanation physics lesson is about principle of expanding with heat and contracting with cold in middle school teaching, because it is bigger to do the experiment difficulty, so the student can not directly detect by an unaided eye, can only understand theoretically, relatively beyond one's depth, impression is deep inadequately.
The utility model content
Problem to be solved in the utility model is at above problem, provides a kind of and can intuitively show principle of expanding with heat and contracting with cold, makes student's easy to understand, impressive demonstrating expansion on heating and contraction on cooling device.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of demonstrating expansion on heating and contraction on cooling device, comprise support, described support is provided with flask and " U " type pipe, described flask is connected by connecting pipe with " U " type pipe, in described " U " type pipe conducting liquid is housed, be provided with first lead in described " U " type pipe, second lead and privates, one end of described first lead and privates is positioned at conducting liquid, one end of described second lead is positioned at the top of conducting liquid liquid level, be in series with the power supply and first pilot lamp between the other end of the other end of described first lead and second lead, the other end of described privates connects the node of the power supply and first pilot lamp through second pilot lamp.
The utility model is taked above technical scheme, have the following advantages: an end of first lead and privates is positioned at conducting liquid, one end of second lead is positioned at the top of conducting liquid liquid level, second lead is provided with first pilot lamp, privates is provided with second pilot lamp, when the liquid in the flask is heated, liquid adds thermal expansion in the flask, the liquid level of the conducting liquid in " U " type pipe left side is risen, the liquid level of the conducting liquid in " U " type pipe right side descends, thereby it is bright to make second lead be provided with first pilot lamp, and privates is provided with second pilot lamp and extinguishes, after stopping heating, liquid cooling is shunk, the liquid level of the conducting liquid in " U " type pipe left side is descended, and the liquid level of the conducting liquid in " U " type pipe right side rises, thereby first pilot lamp that is provided with on second lead is extinguished, second pilot lamp that is provided with on the privates is bright, this device is lighted and is extinguished and show principle of expanding with heat and contracting with cold intuitively by pilot lamp, and easy to understand is with deep impression.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is the structural representation of a kind of demonstrating expansion on heating and contraction on cooling device in the utility model.
Among the figure:
The 1-support, 2-" U " type pipe, 3-first lead, 4-second lead, 5-privates, 6-switch, 7-first pilot lamp, 8-power supply, 9-second pilot lamp, 10-connecting pipe, 11-flask, 12-conducting liquid
Embodiment
Embodiment: as shown in drawings, a kind of demonstrating expansion on heating and contraction on cooling device, comprise support 1, support 1 is provided with flask 11, flask 11 is connected with " U " type pipe 2 by connecting pipe 10, in " U " type pipe 2 conducting liquid 12 is housed, be provided with first lead 3 in " U " type pipe 2, second lead 4 and privates 5, the contact point of first lead, 3 one ends be positioned at " U " type pipe 2 left side conducting liquids 12 liquid levels below, the contact point of one end of second lead 4 is positioned at the top of " U " type pipe 2 left side conducting liquids 12 liquid levels, the contact point of privates 5 one ends be positioned at " U " type pipe 2 right side conducting liquids 12 liquid levels below, be in series with the power supply 8 and first pilot lamp 7 between the other end of the other end of first lead 3 and second lead 4, the other end of privates 5 is through the node of second pilot lamp, the 9 connection power supplys 8 and first pilot lamp 7, and first lead 3 is provided with switch 6.
Closing Switch 6, since first lead, 3 contact points be positioned at " U " type pipe 2 left side conducting liquids 12 liquid levels below, the contact point of second lead 4 is positioned at the top of " U " type pipe 2 left side conducting liquids 12 liquid levels, privates 5 contact points be positioned at " U " type pipe 2 right side conducting liquids 12 liquid levels below, so, first pilot lamp 7 does not work, second pilot lamp 9 is bright, heating flask 11, heated liquid in the flask 11 expands, the liquid level of the conducting liquid 12 in " U " type pipe 2 left sides is risen, the liquid level of the conducting liquid 12 in " U " type pipe 2 right sides descends, when the contact point of privates 5 is positioned at the top of liquid level of conducting liquid 12 on " U " type pipe 2 right sides, second pilot lamp 9 extinguishes, when the liquid level of the conducting liquid 12 in " U " type pipe 2 left sides rises to when contacting with the contact point of second lead 4, the loop is connected, first pilot lamp 7 is bright, after stopping heating, liquid cooling is shunk in the flask 11, the liquid level of the conducting liquid 12 in " U " type pipe 2 left sides is descended, the liquid level of the conducting liquid 12 in " U " type pipe 2 right sides rises, thereby first indication, 7 lamps that are provided with on second lead 4 are extinguished, it is bright that privates 5 is provided with second pilot lamp 9, this device is lighted and is extinguished and show principle of expanding with heat and contracting with cold intuitively by pilot lamp, easy to understand, with deep impression.
Claims (1)
1, a kind of demonstrating expansion on heating and contraction on cooling device, comprise support (1), it is characterized in that: described support (1) is provided with flask (11) and " U " type pipe (2), described flask (11) is connected by connecting pipe (10) with " U " type pipe (2), conducting liquid (12) is housed in described " U " the type pipe (2), be provided with first lead (3) in described " U " the type pipe (2), second lead (4) and privates (5), one end of described first lead (3) and privates (5) is positioned at conducting liquid (12), one end of described second lead (4) is positioned at the top of conducting liquid (12) liquid level, be in series with power supply (8) and first pilot lamp (7) between the other end of the other end of described first lead (3) and second lead (4), the other end of described privates (5) connects the node of power supply (8) and first pilot lamp (7) through second pilot lamp (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200177542U CN201331864Y (en) | 2009-01-12 | 2009-01-12 | Thermal expansion and contraction demonstration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200177542U CN201331864Y (en) | 2009-01-12 | 2009-01-12 | Thermal expansion and contraction demonstration apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201331864Y true CN201331864Y (en) | 2009-10-21 |
Family
ID=41225246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200177542U Expired - Fee Related CN201331864Y (en) | 2009-01-12 | 2009-01-12 | Thermal expansion and contraction demonstration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201331864Y (en) |
-
2009
- 2009-01-12 CN CNU2009200177542U patent/CN201331864Y/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: 20091021 Termination date: 20100219 |