CN87214988U - Pascal law demonstration teaching device - Google Patents
Pascal law demonstration teaching device Download PDFInfo
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- CN87214988U CN87214988U CN 87214988 CN87214988U CN87214988U CN 87214988 U CN87214988 U CN 87214988U CN 87214988 CN87214988 CN 87214988 CN 87214988 U CN87214988 U CN 87214988U CN 87214988 U CN87214988 U CN 87214988U
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- cylinder barrel
- pascal law
- pascal
- closed container
- piston rod
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Abstract
The utility model discloses a Pascal law demonstration teaching device, characterized in that a set of quantitative counterweights are used as measurable external force added to a piston-rod; a soft film bag fixedly connected to the lower end of a cylinder is used to act on hermetic liquid. The utility model has the advantages of reasonable structure, convenient operation, and correct theory, which can exactly verify the Pascal law which reflects liquids transferring pressure regulation in physics, and basically meet teaching requirement.
Description
The utility model relates to a kind of teaching demonstration device, is used for verifying the Pascal law of physics reflection liquid transfer pressure rule.The content of law is: be added in the pressure on the enclosed liquid, can size unchangeably by liquid to all directions transmission.
Once put on display a kind of Pascal law teaching demonstration device in " physical experiment teaching in middle schools best paper and the outstanding teaching aid experience exchangement meeting " that held by Chinese physics association in Foochow in August, 807, by piston rod, cylinder barrel, closed container with its upper wall, sidewall, three piezometers that link to each other respectively of going to the bottom are formed.Wherein piston rod cooperates as injector for medical purpose with cylinder barrel, and the cylinder barrel bottom links to each other with the closed container of full of liquid with a rubber tube.During demonstration, hand push piston rod pressurization, pressure acts on liquid in the closed container by rubber tube, and pressure divides three directive effects in piezometer through liquid transfer, can demonstrate pressure on the piezometer and equate.This instructional device just part checking Pascal law, for the pressure of the enclosed liquid big or small constant proof that then can not get whether in transmittance process.Another kind of teaching demonstration device sees the illustration of the middle school physics textbook in the sixties.The wide-necked bottle that fills liquid seals with the cork of inserting four thin glass tubes, wherein three glass tube exposed parts that diameter is identical are erect and are highly identical, and the length and the mouth of pipe direction of the liquid part of submerging are different: a mouth of pipe is upwards near the bottle end, one arm oral-lateral is between two parties, and the downward position of the mouth of pipe is by last.The lower end mouth of pipe of the 4th thin glass tube is positioned on the liquid level, and the upper end is connected with rubber bladder through sebific duct.Hold the rubber bladder pressurization during demonstration, the pressure that is enclosed within the liquid pressurized generation in the wide-necked bottle transmits to each side, and the size of its pressure is represented with the height that liquid in three thin glass tubes rises.The deficiency of this instructional device does not know to add the size of pressure equally, can not be from quantitatively verifying Pascal law.
The purpose of this utility model is to improve above-mentioned instructional device and the teaching demonstration device of a kind of comprehensive checking Pascal law of providing.
Accompanying drawing 1 is a Pascal law teaching demonstration device synoptic diagram.
The purpose of this instructional device can reach by following measure: make the external force that adds directly adopt one group of counterweight 1 of determining weight to be added on the piston rod 2, and by lower end, the nozzle of cylinder barrel 3 bag film 5 of sack, a fixedly connected softness is acted on enclosed liquid.During experiment, owing to there is the effect of liquid to make bag film 5 in cylinder barrel 3, be downward open state.
Other measures are: require flexible film bag 5 to be made by latex or plastics, the length of bag film 5 is to be advisable less than cylinder barrel 3 end openings to the distance of closed container upper wall greater than cylinder barrel 3 diameters.
Device as shown in Figure 1 is a most preferred embodiment of the present utility model, and it comprises one group of quantitative counterweight 1, piston rod 2, cylinder barrel 3, closed container 4, bag film 5, tubule 6,7,8, height indicator board 9 and water blocking 10.Wherein cylinder barrel 3 inserts closed container 4, and the length of insertion is wanted the good seal junction surface greater than the length of outside; The diameter of piston rod 2 is less than the internal diameter of cylinder barrel 3, between them big gap value will be arranged; Bag film 5 is socketed in the lower end of cylinder barrel 3, and chucking does not make its leakage liquid, and the length of bag 5 is that the lower end of cylinder barrel 3 is to half of closed container upper wall distance; Three tubules 6,7,8 are located on bottom, sidewall and the upper wall of closed container 4 respectively, erect and be positioned on the height indicator board 9 same planes.For convenience of teaching, demonstrating visual, the piston rod 2 in the said apparatus, cylinder barrel 3, closed container 4 and tubule 6,7,8 are preferably selected transparent glass for use, and organic glass or transparent plastic are made.During demonstration, at first to closed container 4 water fillings, water charges into bag film 5 from the below, and it is to the under shed shape, tightens water blocking 10 after closed container is full of water.Piston rod 2 is inserted cylinder barrels 3 and be positioned on the bag film 5, write down the height of water column in the tubule this moment.Subsequently, add quantitative counterweight 1 on the plane, top of piston rod 2, gravity is liquid in piston rod 2 effect bag films 5, and suffered pressure acts on tubule 6,7,8 respectively through transmitting, and can read the numerical value that water column raises by height indicator board 9.Can verify Pascal law through calculating at last.
Another kind of embodiment connects three piezometers respectively in tubule 6,7,8 upper ends of instructional device shown in Figure 1 to constitute.Can directly read the numerical value of the pressure that transmits through enclosed liquid during demonstration, relatively verify Pascal law with initial pressure values again.
The utility model has the advantages such as principle is correct, rational in infrastructure, easy to operate than prior art, can verify all sidedly comparatively exactly Pascal's law, has basically satisfied the needs of teaching.
Claims (3)
1, a kind of Pascal law teaching demonstration device, transparent thin tube 6,7,8 and height indicator board 9 by piston rod 2, cylinder barrel 3, closed container 4, piezometer or express liquid pressure size are formed, it is characterized in that, one group of quantitative counterweight 1 is arranged, can be used as external force and be added on the plane on piston rod 2 tops, at the bag film 5 of the fixedly connected softness in the lower end of cylinder barrel 3.
2, a kind of Pascal law teaching demonstration device according to claim 1 is characterized in that bag film 5 is to be made by latex or plastics.
3, a kind of Pascal law teaching demonstration device according to claim 1 and 2, it is characterized in that the length of bag film 5 should be greater than the diameter of cylinder barrel 3 less than the end opening of cylinder barrel 3 distance to closed container 4 upper walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214988 CN87214988U (en) | 1987-11-02 | 1987-11-02 | Pascal law demonstration teaching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214988 CN87214988U (en) | 1987-11-02 | 1987-11-02 | Pascal law demonstration teaching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87214988U true CN87214988U (en) | 1988-06-15 |
Family
ID=4829190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87214988 Withdrawn CN87214988U (en) | 1987-11-02 | 1987-11-02 | Pascal law demonstration teaching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87214988U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428395A (en) * | 2018-05-09 | 2018-08-21 | 黄琦 | Gasometry Pascal probes into demonstrator |
| CN109801544A (en) * | 2019-01-31 | 2019-05-24 | 燕山大学 | A kind of carbonate rock forming environment condition simulation experimental provision and its application method |
| CN110898916A (en) * | 2019-11-20 | 2020-03-24 | 湖南工业大学 | Kitchen waste bone crushing device |
-
1987
- 1987-11-02 CN CN 87214988 patent/CN87214988U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428395A (en) * | 2018-05-09 | 2018-08-21 | 黄琦 | Gasometry Pascal probes into demonstrator |
| CN109801544A (en) * | 2019-01-31 | 2019-05-24 | 燕山大学 | A kind of carbonate rock forming environment condition simulation experimental provision and its application method |
| CN110898916A (en) * | 2019-11-20 | 2020-03-24 | 湖南工业大学 | Kitchen waste bone crushing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |