CN202976610U - Double-piston atmospheric pressure demonstrating and testing instrument - Google Patents
Double-piston atmospheric pressure demonstrating and testing instrument Download PDFInfo
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- CN202976610U CN202976610U CN 201220695991 CN201220695991U CN202976610U CN 202976610 U CN202976610 U CN 202976610U CN 201220695991 CN201220695991 CN 201220695991 CN 201220695991 U CN201220695991 U CN 201220695991U CN 202976610 U CN202976610 U CN 202976610U
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- atmospheric pressure
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Abstract
The utility model relates to a double-piston atmospheric pressure demonstrating and testing instrument. The double-piston atmospheric pressure demonstrating and testing instrument comprises a base, a cylindrical barrel, two pistons and a force meter. The pistons can move freely in the barrel, can be taken out and form vacuum. The force meter is used in connection with one of the pistons. The double-piston atmospheric pressure demonstrating and testing instrument is simple in structure, simple to operate, low in manufacturing cost and can dynamically directly demonstrate the existence of atmospheric pressure; particularly, the double-piston atmospheric pressure demonstrating and testing instrument can form the vacuum to measure a value of the atmospheric pressure, so that the problem that measurement in teaching of the atmospheric pressure in physics teaching in junior high schools is difficult is solved, experimentation is effectively simplified, experimentation cost is reduced, and experimentation efficiency is improved.
Description
Technical field
The utility model relates to a kind of teaching aid, relates in particular to the demonstration of double-piston atmospheric pressure and analyzer
Background technology
At present, in the teaching of junior physics atmospheric pressure pressure, the demonstration overwhelming majority of relevant atmospheric pressure comes from life example, although it is wider to draw materials, but be not easy to recycle, function singleness, directly perceived not, dynamic is not strong, the student understands difficulty, and it is as professional teaching aid, and limitation is obvious.In the specialty teaching aid, as the Magdeburg hemispheres simulated demonstration instrument etc., what have does not also well address the aforementioned drawbacks, and also needing of having used the utility appliance such as air pump, complex operation, and use cost is higher.Especially for the mensuration of atmospheric pressure, utilize inventory, as large in evangelista torricelli experimental implementation difficulty, use cost is high; Other equipment is difficult to realize the impact of the factors such as vacuum owing to conducting oneself with dignity, and error at measurment is large, and reliability is not enough; Though can barometer etc. is arranged, and not exclusively is suitable for junior middle school physics teaching displaying use.
The utility model content
Technical problem to be solved in the utility model is to provide a kind ofly makes the demonstrator that simple, with low cost, easy and simple to handle, capable of dynamic ocular demonstration atmospheric pressure exists and is not subjected to the equipment effect of weight, the convenient vacuum that forms, error is little, the measuring atmospheric pressure instrument that reliability is high.
For addressing the above problem, double-piston atmospheric pressure demonstration described in the utility model and analyzer comprise base, cylindrical shell, and two pistons and dynamometer is characterized in that:
Described cylindrical shell and dynamometer are fixed on described base.
Described piston can move freely and take out in described cylindrical shell, and is connected use with dynamometer.
Described two live can form vacuum between a plug in described cylindrical shell.
The utility model compared with prior art has the following advantages:
1, due on the utility model middle cylinder body and dynamometer firm banking, can effectively reduce equipment deadweight etc. to the impact of experimental phenomena and data, improve experimental reliability.
2, because two pistons in the utility model middle cylinder body can free movement be connected use with being connected to reach with weight beam, therefore, can be in dynamically the existence of ocular demonstration atmospheric pressure, be conducive to the displaying directly perceived of physics law and phenomenon, thereby strengthened intuitive, the interest and credible of experimental teaching, can take out cleaning, maintenance and the maintenance that also is conducive to equipment simultaneously.
3, owing to forming easily vacuum between two pistons in the utility model cylindrical shell, can effectively measure the strong value of atmosphere, solve the outstanding problem that atmospheric pressure in the prior art is not easy to teaching property mensuration.
4, the utility model making is simple, easy and simple to handle, cheap, does not need other equipment auxiliary, can complete the demonstration of atmospheric pressure existence and the mensuration of atmospheric pressure value, can effectively simplify experimentation, reduces experimental cost, improves conventional efficient.
Description of drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
In figure: 1-base 2-cylindrical shell 3-piston 4-piston 5-dynamometer
Fig. 2 is the explanation schematic diagram of Preparatory work of experiment state.
The explanation schematic diagram that Fig. 3 exists for the demonstration atmospheric pressure.
Fig. 4 is for measuring the explanation schematic diagram of atmospheric pressure.
Embodiment
As shown in Figure 1, double-piston atmospheric pressure demonstration and analyzer, this demonstration and analyzer comprise base 1, cylindrical shell 2, two pistons 3,4 and dynamometer 5.
The existence of embodiment 1 demonstration atmospheric pressure pressure
(1) before the use, two pistons are extracted out, showed the student, determine it is two pistons, make the student be sure of that the movement of right hand piston 4 in experiment is due to atmospheric effect.
(2) two pistons are relative, make its " driving fit " fully.
(3) piston after " driving fit " is pushed cylindrical shell, the hook of dynamometer is hooked on the link of right hand piston, and adjust the position of piston, dynamometer is stretched naturally, and reading is 0 (as Fig. 2).
(4) pull left hand piston 3 left, right hand piston 4 is moved to the left thereupon; This moment, the registration of dynamometer was not 0, illustrate that right hand piston 4 is subject to pulling force to the right, but piston illustrated that to left movement it is subject to certain power left; And be two pistons in cylinder, illustrate that this power is not the pulling force that the people gives; Thereby proved exist (as Fig. 3) of atmospheric pressure and pressure.
The mensuration of embodiment 2 atmospheric pressures
(1) slowly pull left hand piston 3 left, when the two-piston natural separation, when vacuum occurring in cylindrical shell, right hand piston 4 no longer moves, and at this moment, according to balance between two forces, the registration of dynamometer equals the pressure F (as Fig. 4) of atmospheric action on right hand piston.
(2) known or determine the area S of piston, utilize P=F/S can try to achieve the atmospheric pressure of this moment.
(3) because the area S of piston in the utility model is certain, P is directly proportional to F; Can preset force value and pressure values on dynamometer, so both can teaching property mensuration pressure, calculate pressure; Also can directly measure the atmospheric pressure value.
Claims (2)
1. the double-piston atmospheric pressure is demonstrated and analyzer, comprise base (1), cylindrical shell (2), piston (3), piston (4) and dynamometer (5) is characterized in that: described cylindrical shell (2) and dynamometer (5) are fixed on described base (1).
2. double-piston atmospheric pressure as claimed in claim 1 is demonstrated and analyzer, and it is characterized in that: described piston (3) and piston (4) can move freely and take out in described cylindrical shell (2), and are connected use with described dynamometer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695991 CN202976610U (en) | 2012-12-11 | 2012-12-11 | Double-piston atmospheric pressure demonstrating and testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695991 CN202976610U (en) | 2012-12-11 | 2012-12-11 | Double-piston atmospheric pressure demonstrating and testing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202976610U true CN202976610U (en) | 2013-06-05 |
Family
ID=48517655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220695991 Expired - Fee Related CN202976610U (en) | 2012-12-11 | 2012-12-11 | Double-piston atmospheric pressure demonstrating and testing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202976610U (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 |
-
2012
- 2012-12-11 CN CN 201220695991 patent/CN202976610U/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: 20130605 Termination date: 20131211 |