CN201532722U - Air buoyancy demonstration instrument - Google Patents
Air buoyancy demonstration instrument Download PDFInfo
- Publication number
- CN201532722U CN201532722U CN2009202404983U CN200920240498U CN201532722U CN 201532722 U CN201532722 U CN 201532722U CN 2009202404983 U CN2009202404983 U CN 2009202404983U CN 200920240498 U CN200920240498 U CN 200920240498U CN 201532722 U CN201532722 U CN 201532722U
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- CN
- China
- Prior art keywords
- container
- air
- buoyancy
- weight
- fixed pulley
- 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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Abstract
The utility model discloses an air buoyancy demonstration instrument belonging to an experimental instrument for physics teaching. The air buoyancy demonstration instrument is characterized in that a body is an organic transparent glass cylindrical sealed container, the upper portion of the container is provided with a fixed pulley, two ends of a thin line passing around the fixed pulley are respectively fixed with a small light-weight buoyancy demonstration ball and a weight, and the lower end of the container is provided with an air hole connected with an external exhausting and inflating device. The bottom portion of the container is provided with a sponge cushion for preventing the weight from falling down to the bottom portion of the container. With a fixed pulley balance device formed by the small light-weight buoyancy demonstration ball and the weight which are arranged inside the sealed transparent organic glass container, the air buoyancy demonstration instrument realizes the purpose of visually verification on F<buoyancy>= phi<gas density>*g*V<displaced volume>, pressure in the sealed container is changed by exhausting air from or pumping air into the container, therefore, air buoyancy untaken by the small light-weight demonstration ball is changed while changing the air density, and the ball then moves up or down along with the change, thereby realizing vivid vision and facilitating teaching and students' experiments.
Description
Technical field
The utility model belongs to the physics teaching experiment instrument, experimental provision that particularly can the ocular demonstration aerostatic buoyancy.
Background technology
In physics teaching in secondary school, can relate to aerostatic buoyancy knowledge, but not have concrete operability experimental apparatus, general analogy liquid buoyancy teaching.
The utility model content
In order to overcome not intuitively deficiency of existing teaching aerostatic buoyancy, the utility model provides a kind of aerostatic buoyancy demonstrator, the various states that this aerostatic buoyancy demonstrator can ocular demonstration object suffered buoyancy in air.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of aerostatic buoyancy demonstrator, it is characterized in that: main body is organic clear glass column closed container, fixed pulley is arranged at the top at described container, the fine rule two ends of walking around fixed pulley are fixed with lightweight buoyancy demonstration bead and mass respectively, and described container lower end is provided with the outside and lashes the air inlet/outlet that device of air is connected.And foam-rubber cushion is arranged at the bottom at described container, falls container bottom in case work as mass.
The beneficial effects of the utility model are fixed pulley balance devices of being made up of lightweight buoyancy demonstration bead and extension mass in airtight transparent organic glass container, reach and verify F intuitively
Floating=ρ
GasGV
RowPurpose, by in container, extracting or squeeze into air out, change the pressure in the closed container, thereby when changing atmospheric density, the aerostatic buoyancy that lightweight buoyancy demonstration bead is subjected to will change, and rise thereupon or move down, visual in image like this, be convenient to teaching and student experimenting.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model,
Among the figure, 1. closed container, 2. fixed pulley, 3. buoyancy demonstration bead, 4. mass, 5. air inlet/outlet, 6. foam-rubber cushion.
Embodiment
Embodiment of the present utility model is, as shown in the figure:
Claims (2)
1. aerostatic buoyancy demonstrator, it is characterized in that: main body is organic clear glass column closed container, fixed pulley is arranged at the top at described container, the fine rule two ends of walking around fixed pulley are fixed with lightweight buoyancy demonstration bead and mass respectively, and described container lower end is provided with the outside and lashes the air inlet/outlet that device of air is connected.
2. aerostatic buoyancy demonstrator according to claim 1 is characterized in that: foam-rubber cushion is arranged at the bottom of described container.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009202404983U CN201532722U (en) | 2009-10-28 | 2009-10-28 | Air buoyancy demonstration instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009202404983U CN201532722U (en) | 2009-10-28 | 2009-10-28 | Air buoyancy demonstration instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
CN201532722U true CN201532722U (en) | 2010-07-21 |
Family
ID=42528123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2009202404983U Expired - Fee Related CN201532722U (en) | 2009-10-28 | 2009-10-28 | Air buoyancy demonstration instrument |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN201532722U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103761911A (en) * | 2013-12-30 | 2014-04-30 | 倪建林 | Demonstration instrument for measuring strength of aerostatic buoyancy and fluid buoyancy |
CN103943006B (en) * | 2014-01-21 | 2016-06-29 | 余姚市神马教仪成套有限公司 | Buoyant gas demonstration device |
-
2009
- 2009-10-28 CN CN2009202404983U patent/CN201532722U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103761911A (en) * | 2013-12-30 | 2014-04-30 | 倪建林 | Demonstration instrument for measuring strength of aerostatic buoyancy and fluid buoyancy |
CN103761911B (en) * | 2013-12-30 | 2016-03-30 | 倪建林 | Survey the demonstrator of aerostatic buoyancy and liquid buoyancy size |
CN103943006B (en) * | 2014-01-21 | 2016-06-29 | 余姚市神马教仪成套有限公司 | Buoyant gas demonstration device |
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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: 20100721 Termination date: 20101028 |