CN202816225U - Gas buoyancy experiment demonstration instrument - Google Patents
Gas buoyancy experiment demonstration instrument Download PDFInfo
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- CN202816225U CN202816225U CN 201220376699 CN201220376699U CN202816225U CN 202816225 U CN202816225 U CN 202816225U CN 201220376699 CN201220376699 CN 201220376699 CN 201220376699 U CN201220376699 U CN 201220376699U CN 202816225 U CN202816225 U CN 202816225U
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- gas
- gas buoyancy
- airtight
- buoyancy
- cylinder
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Abstract
The utility model relates to a gas buoyancy experiment demonstration instrument for teaching of middle-school physics. The gas buoyancy experiment demonstration instrument comprises a transparent cylinder, a small-range spring dynamometer, a sealed gas-floating cylinder and a gas pumping device. The gas buoyancy experiment demonstration instrument of the utility model has the optimal features that the magnitude of the gas buoyancy is measured by means of the small-range spring dynamometer, so that, on one hand, high display visibility is achieved and the visible requirement on demonstration experiments in class is satisfied; and on the other hand, based on the magnitude of the gas buoyancy, the gas buoyancy is calculated and verified in accordance with the Archimedes principle, thereby effectively reducing the difficulty in understanding the gas buoyancy for students. The gas buoyancy experiment demonstration instrument, which is simple in structure, high in stability and reliability and significant in effect, is easy to operate and is suitable for popularization.
Description
Technical field
The utility model relates to a kind of Gas buoyancy force experiment demonstration instrument, particularly relates to the experiment teaching aid for the teaching of Middle School Physics aerostatic buoyancy.
Background technology
Lecture experiment instrument patent CN201020140153.3 and CN200620085689.3 about buoyant gas equates two quality at present, the object that volume is different, in air, hang over a lever and or the two ends of fixed pulley make it balance, CN200620085689.3 is the volume that changes an end object in air with bladders to balloon inflation, make volume increase end suffered buoyancy in air and increase the lever out of trim; CN201020140153.3 is with after being evacuated in the vacuum (-tight) housing, and pulley two ends loss of buoyance is not waited and out of trim, thereby the existence of explanation buoyant gas all has the following disadvantages:
The one, can not in liquid, reduce directly to prove the existence of buoyant gas from spring dynamometry registration, and can only come from the lever out of trim existence of side light buoyant gas, the student is to abstract buoyant gas or indigestion.
The 2nd, can not measure the size of the suffered buoyant gas of object, can not verify that the buoyancy of gas also meets Archimedes principle.
Summary of the invention
The utility model has designed a kind of Gas buoyancy force experiment demonstrator:
The one, can directly measure the size of buoyant gas.
The 2nd, can be with the airtight air supporting cylinder of different volumes (0.78L, 1.56L, 2.34L), the object of demonstration different volumes suffered buoyancy in air is different, illustrate that buoyant gas follows the relation that arranges gas volume; Next is by the difference to the degree of bleeding in the vacuum (-tight) housing, makes airtight air supporting cylinder suffered buoyancy under gas with various density of equal volume different, and the relation of explanation buoyant gas and gas density.
The 3rd, can measure comparatively accurately the size of the suffered buoyancy of object, the buoyancy of checking gas also meets Archimedes principle.
Technical solutions of the utility model are as follows
The utility model Gas buoyancy force experiment demonstrator is comprised of transparent drum, small-range weight beam, airtight air supporting cylinder, air extractor, and described airtight air supporting cylinder is suspended under the small-range weight beam.
Described transparent drum bottom is provided with aspirating hole and air admission hole.
Described small-range weight beam, by upper end cover, spring, the drum type brake tuning drive gear, transparent cylinder shell, hook, backguy, airtight disk form, and the upper end of cylinder and end cap spin airtight, and the airtight disk in the lower end of cylinder can be airtight with transparent drum.
The greatest measurement of described small-range weight beam is 0.2N, display precision is 0.001N/mm (or 0.1g/mm), the Weight control of airtight air supporting cylinder is 0.15N (15g), material can be the mineral water bottle material, through experimental calculation, the wall thickness of airtight air supporting cylinder is slightly thinner than the mineral water bottle wall thickness can reach this requirement of experiment.The volume of air supporting cylinder is respectively 0.78L, 1.56L, 2.34L, their suffered buoyancy in air is respectively 0.01N (1g), 0.02N (2g), 0.03N (3g), the length of the elongation of weight beam divides other for 10mm, 20mm, 30mm like this, can satisfy the visual requirement of lecture experiment fully.
Described airtight air supporting cylinder be three be equal in weight, highly identical, coloured light plastic cylinder that volume is different, purpose is that the initial registration that in air they is hung over the indication of weight beam lower time is identical, be used for comparing varying in size of the suffered buoyancy of different volumes, coloured is in order to improve visuality.
Description of drawings
Fig. 1 is Gas buoyancy force experiment demonstration instrument synoptic diagram.
Fig. 2 is small-range weight beam synoptic diagram.
Wherein: 1 is transparent drum, and 2 is the small-range weight beam, and 3 is airtight air supporting cylinder, and 4 is aspirating hole, and 5 is air admission hole.
201 is upper end cover, 202 transparent cylinder shells, and 203 is spring, and 204 is the drum type brake tuning drive gear, and 205 is zero graduation, and 206 are hook, and 207 are backguy, and 208 is airtight disk.
Specific embodiment
207 backguys of leaving behind, under the small-range weight beam, hang up airtight air supporting cylinder, place in the transparent drum, air in the transparent drum is extracted out, airtight air supporting cylinder will no longer be subject to the buoyancy of air, then the registration of weight beam will increase, and the power of increase is airtight air supporting cylinder suffered buoyancy in air, thereby the explanation air has produced buoyancy to airtight air supporting cylinder.
Open the air admission hole of bottom of cylinder, the air of putting into, after putting into a certain amount of air, the registration of weight beam can reduce according to the increase of atmospheric density in the cylinder, thus the relation of the density of explanation buoyant gas and gas.
Under weight beam, hang the airtight air supporting cylinder of different volumes, different according to measured buoyancy, buoyant gas and the relation that arranges gas volume are described.
According to the concrete size of reading the suffered buoyancy of airtight air supporting cylinder on the small-range weight beam, application of formula F
Floating=G
Row=ρ
GasV
RowG calculates, and the checking buoyant gas also meets Archimedes principle.
The utility model play configuration is simple, and processing ease is reliable and stable, and successful is fit to promote.
Claims (4)
1. a Gas buoyancy force experiment demonstrator is characterized in that being comprised of transparent drum, small-range weight beam, airtight air supporting cylinder, air extractor, and described airtight air supporting cylinder hangs under the small-range weight beam.
2. Gas buoyancy force experiment demonstrator according to claim 1, it is characterized in that: described transparent drum, bottom are provided with aspirating hole and air admission hole.
3. Gas buoyancy force experiment demonstrator according to claim 1 is characterized in that: described small-range weight beam, and the bottom is provided with airtight disk, and the upper end of cylinder and end cap spin airtight, and the airtight disk of cylinder lower end can be airtight with transparent drum.
4. Gas buoyancy force experiment demonstrator according to claim 1, it is characterized in that: described airtight air supporting cylinder is three and is equal in weight that volume does not wait, coloured light plastic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376699 CN202816225U (en) | 2012-07-24 | 2012-07-24 | Gas buoyancy experiment demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376699 CN202816225U (en) | 2012-07-24 | 2012-07-24 | Gas buoyancy experiment demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202816225U true CN202816225U (en) | 2013-03-20 |
Family
ID=47875071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220376699 Expired - Fee Related CN202816225U (en) | 2012-07-24 | 2012-07-24 | Gas buoyancy experiment demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202816225U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114397225A (en) * | 2022-01-20 | 2022-04-26 | 王长伦 | A buoyancy method gas density sensor |
-
2012
- 2012-07-24 CN CN 201220376699 patent/CN202816225U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114397225A (en) * | 2022-01-20 | 2022-04-26 | 王长伦 | A buoyancy method gas density sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20140724 |
|
| EXPY | Termination of patent right or utility model |