CN204406830U - One vacuumizes teaching aid - Google Patents
One vacuumizes teaching aid Download PDFInfo
- Publication number
- CN204406830U CN204406830U CN201520092056.4U CN201520092056U CN204406830U CN 204406830 U CN204406830 U CN 204406830U CN 201520092056 U CN201520092056 U CN 201520092056U CN 204406830 U CN204406830 U CN 204406830U
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- vacuum
- valve
- tight
- vacuumizes
- teaching aid
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Abstract
The utility model discloses one and vacuumize teaching aid, comprise apparatus for vacuum producing, connect tracheae, vacuum (-tight) housing, retaining valve and gas admittance valve, described retaining valve and gas admittance valve are connected on vacuum (-tight) housing, one end of described connection tracheae is connected with apparatus for vacuum producing, the other end is communicated with retaining valve, and described apparatus for vacuum producing is provided with vent valve.The utility model, by bleeding to the air in vacuum (-tight) housing, makes its inner air reduce, and air pressure reduces, thus completes a series of experiment relevant with air pressure change.Structure is simple, and easy to use, strong operability, does lecture experiment phenomenon obvious; Little being easy to of cost is promoted.
Description
Technical field
The utility model relates to a kind of teaching aid, and in particular one vacuumizes teaching aid.
Background technology
In junior middle school physics teaching, some physical knowledge, for departing from their life cognitive ability student, is difficult to intuitively find and realize.Such as: can sound be propagated in a vacuum; Air pressure is on the impact etc. of boiling point, and this makes student in learning process, is in passive acceptance, not easily understands.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides one and vacuumizes teaching aid, simple and easyly effectively can carry out physical vacuum demonstration.
The utility model is achieved through the following technical solutions, the utility model comprises apparatus for vacuum producing, connects tracheae, vacuum (-tight) housing, retaining valve and gas admittance valve, described retaining valve and gas admittance valve are connected on vacuum (-tight) housing, one end of described connection tracheae is connected with apparatus for vacuum producing, the other end is communicated with retaining valve, and described apparatus for vacuum producing is provided with vent valve.
As one of optimal way of the present utility model, described apparatus for vacuum producing is the pump bowl of cylindrical tube shape, and the piston in described pump bowl is double-decker, and the top of described pump bowl connects vent valve.The piston of double-deck pump bowl can strengthen effect of bleeding.As one of optimal way of the present utility model, described vent valve is arranged on the barrel of apparatus for vacuum producing, described vent valve comprises vent port and has flexible blocking, the head end aperture of described vent port is greater than end aperture, described vent port reduces gradually along the barrel ecto-entad aperture of apparatus for vacuum producing, described blocking is arranged in vent port, and the head end of described vent port is provided with the baffle plate with opening, and described opening is less than the external diameter of blocking.When bleeding, there is certain deformation by blocking, blocking vent port.
As one of optimal way of the present utility model, described apparatus for vacuum producing and retaining valve are respectively equipped with by crimp head, the two ends connecting tracheae are connected on apparatus for vacuum producing and retaining valve respectively by by crimp head.By crimp head use can fast, connect and dismounting and sealing is very good.
As one of optimal way of the present utility model, described gas admittance valve is ball valve.After exhausting gas, vacuum (-tight) housing air pressure inside is very little, and outside air pressure is large, and vacuum (-tight) housing cannot be opened.Will, by the rotation process of ball valve handle, air be made again to enter vacuum (-tight) housing inside.
As one of optimal way of the present utility model, described vacuum (-tight) housing is transparent vacuum cover, and described vacuum (-tight) housing comprises cover cap and cover body, and described cover cap is closed by screw thread and sealing gasket and is connected on cover body.
The utility model has the following advantages compared to existing technology: the utility model, by bleeding to the air in vacuum (-tight) housing, makes its inner air reduce, and air pressure reduces, thus completes a series of experiment relevant with air pressure change.Structure is simple, and easy to use, strong operability, does lecture experiment phenomenon obvious; Little being easy to of cost is promoted.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, the present embodiment comprises apparatus for vacuum producing 1, connects tracheae 2, vacuum (-tight) housing 3, retaining valve 4 and gas admittance valve 5, retaining valve 4 and gas admittance valve 5 are connected on vacuum (-tight) housing 3, the one end connecting tracheae 2 is connected with apparatus for vacuum producing 1, the other end is communicated with retaining valve 4, and apparatus for vacuum producing 1 is provided with vent valve 6.The apparatus for vacuum producing 1 of the present embodiment is the pump bowl of column casing shape, and the piston in pump bowl is double-decker, and the top of pump bowl connects vent valve 6, and vacuumizing effect can be made better.
Vent valve 6 is arranged on the barrel at apparatus for vacuum producing 1 top, vent valve 6 comprises vent port 61 and has flexiblely blocks 62, the head end aperture of vent port 61 is greater than end aperture, vent port 61 reduces gradually along the barrel ecto-entad aperture of apparatus for vacuum producing 1, block and 62 be arranged in vent port 61, the head end of vent port 61 is provided with the baffle plate 63 with opening, opening be less than block 62 external diameter.
Apparatus for vacuum producing 1 and retaining valve 4 are respectively equipped with by crimp head 21, connect tracheae 2 and be connected on apparatus for vacuum producing 1 and retaining valve 4 respectively by by crimp head 21.Can realize connecting tracheae 2 to be connected with the Simple sealing of apparatus for vacuum producing 1 and retaining valve 4.
The gas admittance valve 5 of the present embodiment is ball valve.Can easy to exhaust.Vacuum (-tight) housing 3 is transparent vacuum cover, and described vacuum (-tight) housing 3 comprises cover cap and cover body, and cover cap is closed by screw thread and sealing gasket and is connected on cover body.Store the container will demonstrating equipment in cover body, be convenient to observation effect.
When outwards being extracted out by the piston of pump bowl, retaining valve 4 is opened, 62 vent ports 61 blocked on pump bowl barrel of blocking prevent the air in air inlet vacuum (-tight) housing 3 from entering in pump bowl, when piston is inwardly pushed, retaining valve 4 is closed and is sealed and prevents gas from entering, and piston inwardly pushes and the gas entered in pump bowl is discharged pump bowl by vent valve 6 simultaneously.Thus complete a pumping process, the continuous to-and-fro movement of piston, just circulation is bled.Gas admittance valve 5 mainly plays airtight and return-air effect, and after end of bleeding, vacuum (-tight) housing 3 air pressure inside is very little, and the gland bonnet that external pressure is large is difficult to open, and by gas admittance valve 5, gas is entered again, just can open.
Use vacuum extractor of the present utility model, can demonstrating sound when can not propagate in a vacuum, when constantly bleeding, ringing sound of cell phone reduces gradually, and when air inlet, sound becomes large special more obvious.Demonstration air pressure on during the affecting of boiling point by making vacuum (-tight) housing 3 internal gas pressure reduce, the water of 80 degrees centigrade can be made again to seethe with excitement.Demonstration air pressure change can make balloon volumetric expansion or make the table tennis of distortion recover visual phenomenon.
Claims (6)
1. one kind vacuumizes teaching aid, it is characterized in that, comprise apparatus for vacuum producing, connect tracheae, vacuum (-tight) housing, retaining valve and gas admittance valve, described retaining valve and gas admittance valve are connected on vacuum (-tight) housing, one end of described connection tracheae is connected with apparatus for vacuum producing, the other end is communicated with retaining valve, and described apparatus for vacuum producing is provided with vent valve.
2. one according to claim 1 vacuumizes teaching aid, it is characterized in that, described apparatus for vacuum producing is the pump bowl of cylindrical tube shape, and the piston in described pump bowl is double-decker, and the top of described pump bowl connects vent valve.
3. one according to claim 1 and 2 vacuumizes teaching aid, it is characterized in that, described vent valve is arranged on the barrel of apparatus for vacuum producing, described vent valve comprises vent port and has flexible blocking, the head end aperture of described vent port is greater than end aperture, and described vent port reduces gradually along the barrel ecto-entad aperture of apparatus for vacuum producing, described in block and be arranged in vent port, the head end of described vent port is provided with the baffle plate with opening, and described opening is less than the external diameter of blocking.
4. one according to claim 1 vacuumizes teaching aid, it is characterized in that, described apparatus for vacuum producing and retaining valve are respectively equipped with by crimp head, and the two ends connecting tracheae are connected on apparatus for vacuum producing and retaining valve respectively by by crimp head.
5. one according to claim 1 vacuumizes teaching aid, it is characterized in that, described gas admittance valve is ball valve.
6. one according to claim 1 vacuumizes teaching aid, it is characterized in that, described vacuum (-tight) housing is transparent vacuum cover, and described vacuum (-tight) housing comprises cover cap and cover body, and described cover cap is closed by screw thread and sealing gasket and is connected on cover body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092056.4U CN204406830U (en) | 2015-02-09 | 2015-02-09 | One vacuumizes teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520092056.4U CN204406830U (en) | 2015-02-09 | 2015-02-09 | One vacuumizes teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204406830U true CN204406830U (en) | 2015-06-17 |
Family
ID=53430671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520092056.4U Expired - Fee Related CN204406830U (en) | 2015-02-09 | 2015-02-09 | One vacuumizes teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204406830U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935112A (en) * | 2017-05-17 | 2017-07-07 | 中国科学技术大学 | A kind of vacuum plant |
| CN109458533A (en) * | 2018-11-02 | 2019-03-12 | 浙江厚达智能科技股份有限公司 | The jet-propelled jacking-rotating device of fiber reel scanning machine |
| CN115464836A (en) * | 2022-10-08 | 2022-12-13 | 重庆思普宁塑胶制品有限公司 | Intelligent automobile accessory injection molding system |
-
2015
- 2015-02-09 CN CN201520092056.4U patent/CN204406830U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935112A (en) * | 2017-05-17 | 2017-07-07 | 中国科学技术大学 | A kind of vacuum plant |
| CN109458533A (en) * | 2018-11-02 | 2019-03-12 | 浙江厚达智能科技股份有限公司 | The jet-propelled jacking-rotating device of fiber reel scanning machine |
| CN115464836A (en) * | 2022-10-08 | 2022-12-13 | 重庆思普宁塑胶制品有限公司 | Intelligent automobile accessory injection molding system |
| CN115464836B (en) * | 2022-10-08 | 2024-04-02 | 重庆思普宁科技股份有限公司 | Intelligent auto-parts system of moulding plastics |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20160209 |