CN202189492U - Atmospheric pressure demonstrator - Google Patents
Atmospheric pressure demonstrator Download PDFInfo
- Publication number
- CN202189492U CN202189492U CN2011200631744U CN201120063174U CN202189492U CN 202189492 U CN202189492 U CN 202189492U CN 2011200631744 U CN2011200631744 U CN 2011200631744U CN 201120063174 U CN201120063174 U CN 201120063174U CN 202189492 U CN202189492 U CN 202189492U
- Authority
- CN
- China
- Prior art keywords
- atmospheric pressure
- glass tube
- glass container
- organic glass
- thin glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to an atmospheric pressure demonstrator. A rectangular organic glass container is used as a base, and a thin glass tube with scales is inserted into a rotary switch, then sleeved in a green spherical funnel and finally nested in a hole at the center of the rectangular organic glass container. The air is filled in the rectangular organic glass container, and the thin glass tube with scales and the green spherical funnel are communicated with the air through the rotary switch. The temperature of the air is constant during the whole experiment demonstration process. The exact value of the atmospheric pressure can be obtained or the atmospheric pressure can be directly read from the thin glass tube with scales according to the Boyle's law (Rho 0V0=Rho 1V1) in good coincidence. The atmospheric pressure demonstrator is vivid, safe and reliable when used for teaching, and can accurately measure the atmospheric pressure there and then.
Description
One, technical field
The utility model is a kind of demonstration device of physical experiment teaching in middle schools, and the atmospheric pressure of quantitative measurment there and then is the demonstration device of a kind of " safety, environmental protection, low-carbon (LC) ".
Two, background technology
At present, in physical experiment teaching in middle schools, measure atmospheric pressure with mercury usually, because mercury has severe toxicity, mercury vapor particularly, this has had a strong impact on teachers and students' physical and mental health.Country proposes absolute prohibition for a long time and does experiment with mercury to middle school student thus.And this experiment is tested in still tearing open with the Tuoli up to now in physics teaching in secondary school.This experiment is again a requisite demonstration device in the physical experiment teaching in middle schools.
Three, summary of the invention
The object of the invention is exactly a kind of green, environmental protection, low-carbon (LC), safe, healthy atmospheric pressure demonstration device to be provided to teachers and students, accurately measures the atmospheric pressure of there and then quantitatively.
The goal of the invention of the utility model is achieved in that a kind of atmospheric pressure demonstration device is a base by the organic glass container of rectangular shape; Then graduated thin glass tube is inserted in the rotary switch; Be inserted in green spherical hopper again, embed at last in the hole of organic glass container upper central of rectangular shape.In the organic glass container of rectangular shape air is arranged, graduated thin glass tube, green spherical hopper is through rotary switch and atmosphere.Gas remains isothermal in the overall process of lecture experiment.Again by Boyle law (ρ
0v
0=ρ
1v
1), obtain the accurate numerical value of atmospheric pressure, or by directly reading atmospheric pressure on the graduated thin glass tube, both coincide better.Use the utility model is imparted knowledge to students, and is not only directly perceived, safe and reliable, and can accurately measure the atmospheric pressure of there and then.
Description of drawings:
Accompanying drawing 1 partly cuts open synoptic diagram for the utility model.
Four, embodiment
1, in the accompanying drawing 1; Rotary switch (4) is opened; The organic glass container (6) of rectangular shape is connected also and atmosphere through green spherical hopper (5) with graduated glass tube (2), and this moment, interior atmosphere (7) pressure of organic glass container (6) of rectangular shape was ρ
0, volume is v
0
2, in the accompanying drawing 1,, fill with graduated thin glass tube (2) lining with the syringe water column (3) that will dye again with rotary switch (4) closure.(thin glass tube (2) internal diameter is d).
3, in the accompanying drawing 1; Again rotary switch (4) is opened; Make dyeing water column (3) in green spherical hopper (5) flows into the organic glass container (6) of rectangular shape, when dyeing water column (3) stopped to flow, dyeing water column present level was h in the graduated thin glass tube (2); This moment, the inside and outside air of organic glass container (6) (7) pressure of rectangular shape equated (balance), and promptly air (7) pressure in the organic glass container (6) of rectangular shape is ρ
1=ρ
0+ ρ
WaterGh, volume are v
1=v
0-π (d/2)
2(L-h) (explain: L is thin glass tube (a 2) total length, and h is the present height of dyeing water column (3) in the glass tube (2)).
4, in the accompanying drawing 1, the overall process gas (7) of demonstration all is that isothermal changes, and has according to Boyle law: ρ
0v
0=ρ
1v
1=(ρ
0+ ρ
WaterGh) [v
0-π (d/2)
2(L-h)], obtain ρ
0Numerical value also can directly be read atmospheric pressure from graduated thin glass tube (2).
Claims (2)
1. an atmospheric pressure demonstration device (1); Form by the organic glass container (6) of rectangular shape, graduated thin glass tube (2), rotary switch (4) and green spherical hopper (5); The organic glass container (6) that it is characterized in that rectangular shape is a base; Graduated thin glass tube (2) is inserted in the rotary switch (4), be inserted in green spherical hopper (5) again, embed at last in the hole of organic glass container (6) upper central of rectangular shape.
2. atmospheric pressure demonstration device according to claim 1 (1) is characterized in that in the organic glass container (6) of rectangular shape air (7) being arranged, graduated thin glass tube (2), and green spherical hopper (5) is through rotary switch (4) and atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200631744U CN202189492U (en) | 2011-03-05 | 2011-03-05 | Atmospheric pressure demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200631744U CN202189492U (en) | 2011-03-05 | 2011-03-05 | Atmospheric pressure demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202189492U true CN202189492U (en) | 2012-04-11 |
Family
ID=45920928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200631744U Expired - Fee Related CN202189492U (en) | 2011-03-05 | 2011-03-05 | Atmospheric pressure demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202189492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268722A (en) * | 2013-06-13 | 2013-08-28 | 李家海 | Novel dynamic atmosphere pressure existence demonstration instrument |
-
2011
- 2011-03-05 CN CN2011200631744U patent/CN202189492U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268722A (en) * | 2013-06-13 | 2013-08-28 | 李家海 | Novel dynamic atmosphere pressure existence demonstration instrument |
| CN103268722B (en) * | 2013-06-13 | 2016-04-27 | 李家海 | There is demonstrator in Novel dynamic formula atmospheric pressure |
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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: 20120411 Termination date: 20130305 |