CN207409169U - Atmospheric pressure demonstration teaching aid - Google Patents
Atmospheric pressure demonstration teaching aid Download PDFInfo
- Publication number
- CN207409169U CN207409169U CN201720860302.5U CN201720860302U CN207409169U CN 207409169 U CN207409169 U CN 207409169U CN 201720860302 U CN201720860302 U CN 201720860302U CN 207409169 U CN207409169 U CN 207409169U
- Authority
- CN
- China
- Prior art keywords
- air bag
- pedestal
- atmospheric pressure
- end cover
- trunnion
- 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 is related to teaching equipment technical fields, are specifically a kind of atmospheric pressure demonstration teaching aid.Air bag including open container and in open container, air bag is made of upper end cover, pedestal and the retracting cylinder that is connected between upper end cover and pedestal, helical spring is provided in air bag, the both ends of helical spring withstand on the upper end cover of air bag and the inner wall of pedestal, remain inflated for air bag respectively, the trunnion of communicated air bags inner cavity is provided on upper end cover, trunnion sealing cover on trunnion is installed, air extractor is connected with by communicating pipe on pedestal.Its is simple in structure, easy to use, can visually demonstrate atmospheric pressure presence, and student is facilitated to understand atmospheric pressure phenomenon.
Description
Technical field
The utility model is related to teaching equipment technical fields, are specifically a kind of atmospheric pressure demonstration teaching aid.
Background technology
Atmospheric pressure is that the object in atmosphere is acted on pressure on object by atmosphere self gravitation generation.But by
Visual sense is difficult in atmospheric pressure to arrive, especially low age student lacks enough practical experiences, it is difficult to experience atmospheric pressure
In the presence of not understanding accurately atmospheric pressure.There is an urgent need to one kind in Process of Physics Teaching in Middle School can visually demonstrate atmospheric pressure
Power exists and can show the atmospheric pressure demonstration teaching aid of atmospheric pressure intensity.
The content of the invention
The purpose of this utility model be to provide it is a kind of it is simple in structure, easy to use, atmospheric pressure presence can be visually demonstrated
Atmospheric pressure demonstration teaching aid.
The utility model is for technical scheme applied to solve the technical problem：
Atmospheric pressure demonstration teaching aid described in the utility model includes open container and the gas in open container
Capsule, the air bag are made of upper end cover, pedestal and the retracting cylinder that is connected between upper end cover and pedestal, and spiral shell is provided in air bag
Spring is revolved, the both ends of the helical spring withstand on the upper end cover of air bag and the inner wall of pedestal, air bag is made to keep expansion shape respectively
State is provided with the trunnion of communicated air bags inner cavity on upper end cover, is equipped with trunnion sealing cover on the trunnion, passes through on the pedestal
Communicating pipe is connected with air extractor.
The air extractor includes piston cylinder, the piston being slidably mounted in piston cylinder, and promotion piston is connected on piston
Mobile push rod, one end of piston cylinder is connected with communicating pipe, push rod is to the other end extension of piston cylinder and the end position of push rod
In the outside of piston cylinder, there is side opening in the end set for the piston cylinder for being connected with communicating pipe, it is close to be equipped with side opening on the side opening
Capping.
Due to the above structure, the atmospheric pressure demonstration teaching aid it is simple in structure, it is easy to use, can visually demonstrate it is big
Atmospheric pressure exists, and student is facilitated to understand atmospheric pressure phenomenon.
Description of the drawings
Fig. 1 is the structure diagram of the utility model one embodiment.
Specific embodiment
As shown in Figure 1, atmospheric pressure demonstration teaching aid described in the utility model includes open container 1 and mounted on open
Air bag 2 in container 1, the air bag 2 is by upper end cover 21, pedestal 22 and is connected to flexible between upper end cover 21 and pedestal 22
Cylinder 23 is formed, and upper end cover 21 and pedestal 22 are using rigid body made of glass or transparent plastic, and retracting cylinder 23 is to use
Bellows or folding wall pipe made of soft transparent material, it is scalable in short transverse.Helical spring is provided in air bag 2
24, the both ends of the helical spring 24 withstand on the upper end cover 21 of air bag 2 and the inner wall of pedestal 22, air bag 2 are made to keep swollen respectively
Swollen state is provided with the trunnion 3 of 2 inner cavity of communicated air bags on upper end cover 21, trunnion sealing cover 31, institute is equipped on the trunnion 3
It states and air extractor is connected with by communicating pipe 4 on pedestal 22.
During demonstration, student can be allowed to press trunnion 3 first, it is made to understand that air bag 2 is protected in the case where no external force acts on
Swelling state is held, when the effect of being under pressure is a, air bag 2 overcomes the elastic force of helical spring 24 to shrink, and the height of air bag 2 reduces；
Trunnion sealing cover 31, the inside and outside air pressure of isolation air bag 2 are then covered, and is evacuated by air extractor, at this time it can be seen that in larynx
In the case of not applying active force on pipe 3, air bag 2 can also be shunk, and height reduces, and be explained with this when pumping, in air bag 2
The pressure in portion reduces, external pressure is more than internal pressure, therefore air bag 2 is shunk.
Electric air pump may be employed in air extractor, can also use hand gear as shown in Figure 1.The air extractor bag
Piston cylinder 5, the piston being slidably mounted in piston cylinder 56 are included, the push rod 7 that piston 6 is promoted to move, piston 6 are connected on piston 6
Cross sectional shape be match the circle of piston cylinder 5 inner cavity either regular polygon the outer rim of piston 6 can also be embedded in silica gel or
Sealing ring made of rubber, the inner wall of sealing ring are fixedly connected on piston 6, and the inner wall of the outer wall and piston cylinder 5 of sealing ring is in
It is slidingly sealed cooperation, one end of piston cylinder 5 is connected with communicating pipe 4, other end extension and push rod 7 of the push rod 7 to piston cylinder 5
End is located at the outside of piston cylinder 5, has side opening 8 in the end set for the piston cylinder 5 for being connected with communicating pipe 4, pacifies on the side opening 8
Equipped with side opening sealing cover 9.After pumping is completed, in the case of keeping 6 position of piston constant, side opening sealing cover 9 is opened, makes air bag
Pressure recovery in 2, air bag 2 can recover swelling state.
Claims (2)
1. atmospheric pressure demonstration teaching aid, including open container（1）With mounted on open container（1）Interior air bag（2）, it is special
Sign is：The air bag（2）By upper end cover（21）, pedestal（22）And it is connected to upper end cover（21）And pedestal（22）Between stretch
Contracting cylinder（23）It forms, air bag（2）Inside it is provided with helical spring（24）, the helical spring（24）Both ends withstand on air bag respectively
（2）Upper end cover（21）And pedestal（22）Inner wall on, make air bag（2）It remains inflated for, upper end cover（21）On the company of being provided with
Ventilation capsule（2）The trunnion of inner cavity（3）, the trunnion（3）On trunnion sealing cover is installed（31）, the pedestal（22）On pass through company
Siphunculus（4）It is connected with air extractor.
2. atmospheric pressure demonstration teaching aid according to claim 1, it is characterised in that：The air extractor includes piston cylinder（5）、
It is slidably mounted on piston cylinder（5）Interior piston（6）, piston（6）On be connected with promotion piston（6）Mobile push rod（7）, piston cylinder
（5）One end and communicating pipe（4）Connection, push rod（7）To piston cylinder（5）The other end extension and push rod（7）End be located at
Piston cylinder（5）Outside, be connected with communicating pipe（4）Piston cylinder（5）End set have side opening（8）, the side opening（8）On
Side opening sealing cover is installed（9）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720860302.5U CN207409169U (en) | 2017-07-17 | 2017-07-17 | Atmospheric pressure demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720860302.5U CN207409169U (en) | 2017-07-17 | 2017-07-17 | Atmospheric pressure demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207409169U true CN207409169U (en) | 2018-05-25 |
Family
ID=62322626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720860302.5U Expired - Fee Related CN207409169U (en) | 2017-07-17 | 2017-07-17 | Atmospheric pressure demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207409169U (en) |
-
2017
- 2017-07-17 CN CN201720860302.5U patent/CN207409169U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180525 Termination date: 20190717 |