CN202306907U - Pascal's law experimental device - Google Patents
Pascal's law experimental device Download PDFInfo
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- CN202306907U CN202306907U CN2011203747047U CN201120374704U CN202306907U CN 202306907 U CN202306907 U CN 202306907U CN 2011203747047 U CN2011203747047 U CN 2011203747047U CN 201120374704 U CN201120374704 U CN 201120374704U CN 202306907 U CN202306907 U CN 202306907U
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- tank
- piezometric tube
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- pascal
- law experimental
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Abstract
The utility model provides a Pascal's law experimental device which includes a water storage container (1), an elastic thin assembly, a pressure increasing assembly, and a pressure testing pipe group. The elastic thin assembly of the sealed water storage container (1) is arranged on a container mouth of the water storage container (1). The water storage container (1) is filled with water. The pressure increasing assembly is arranged above the elastic thin assembly. The pressure testing pipe group is vertically arranged, and includes at least one high level pressure testing pipe (6), at least one middle level pressure testing pipe (8), and at least one low level pressure testing pipe (9). An opening of the high level pressure testing pipe (6) is arranged on the top of the inside of the water storage container (1). An opening of the middle level pressure testing pipe (8) is arranged in the middle of the inside of the water storage container (1). An opening of the low level pressure testing pipe (9) is arranged on the bottom of the inside of the water storage container (1). The Pascal's law experimental device not only can demonstrate that the pressure put on a sealed liquid is unchangeably transmitted to various directions via the liquid, but also can quantitatively verify the Pascal's law. The method is visual, has an excellent effect, and is clear in physical significance.
Description
Technical field
The utility model relates to a kind of physics facility, relates in particular to a kind of Pascal law experimental provision.
Background technology
Pascal law is a law important in the fluid mechanics, and its particular content is: be added in the pressure on the enclosed liquid, can size unchangeably by liquid to all directions transmission.
Change a mode and understand, according to static pressure fundamental equation (p=p
0+ pgh), being contained in the liquid in the closed container, it adds pressure p
0When changing, as long as liquid still keeps its original stationary state constant, onesize variation all will take place in the pressure of any point in the liquid.In other words, in closed container, the pressure that puts on the inactive liquid will pass to each point simultaneously with equivalence.Here it is pascal's principle, or claim the Hydrostatic Transfer Device principle.
Just because the flowability of liquid, the pressure change that certain part of the stationary fluid in the closed container takes place, with size unchangeably to all directions transmission.
Pressure equals acting force divided by active area.According to pascal's principle, apply certain pressure on the piston in Hydraulic Power System, will on another piston, produce identical pressure increment.If the area of second piston is 10 times of area of first piston, act on second power on the piston so and will increase and be 10 times of first piston, and the pressure on two pistons still equates.Water pressure engine is exactly the instance of pascal's principle.It serves many purposes, like hydraulic braking etc.
In the physics teaching in secondary school; The experiment of Pascal law generally is to make of Pascal's ball, and piston is exerted pressure to the water in the spheroidal water storage cylinder; Make the rubber membrane outside protrusion all on the aperture that distributes along spheroid, show that pressure that liquid can receive it is to all directions transmission.
But this experiment hour makes at pressure and is in that rubber membrane below the spherosome receives the gravity of water simultaneously and outstanding more, this law of checking that can not be quantitative.
The utility model content
The purpose of the utility model provides a kind of Pascal law experimental provision, and method is directly perceived, the demonstration of being convenient to experimentize in the classroom, and the physical significance clear and definite, effective.
The purpose of the utility model realizes through following technical scheme:
A kind of Pascal law experimental provision comprises: tank 1, Thin Elastic assembly, pressure-applying unit, piezometric tube group;
The Thin Elastic assembly of sealing tank 1 is located at the vessel port place of tank 1, is full of water in the tank 1;
Pressure-applying unit is located at Thin Elastic assembly top;
The piezometric tube group vertically is provided with, and comprises at least one high-order piezometric tube 6, at least one meta piezometric tube 8 and at least one low level piezometric tube 9; The opening of high-order piezometric tube 6 is positioned at the top of tank 1; The opening of meta piezometric tube 8 is positioned at the middle part of tank 1; The opening of low level piezometric tube 9 is positioned at the bottom of tank 1.
Described high-order piezometric tube 6, meta piezometric tube 8 comprise downwards with the opening direction of low level piezometric tube 9, make progress, forward, backward, left, to the right or vergence direction.
Described Thin Elastic assembly comprises round hat plastic foil 14, through tightening the vessel port place that rope 15 is fixed in tank 1.
Described pressure-applying unit comprises scale pan 12 and counterweight 11; Scale pan 12 is located on the Thin Elastic assembly; Counterweight 11 is located in the scale pan 12.
Described Pascal law experimental provision also comprises water inlet pipe 2, and water inlet pipe 2 is located at tank 1, and tank 1 is stretched in the inner.
The outer end of said water inlet pipe 2 is provided with sebific duct 5, and said sebific duct 5 is provided with sebific duct folder 4.
Described Pascal law experimental provision also comprises vent valve 13, and vent valve 13 is located at Thin Elastic assembly top.
Described Pascal law experimental provision also comprises rule 10; Rule 10 and piezometric tube group are set in parallel in the side of tank 1.
Technical scheme by above-mentioned the utility model provides can be found out; The described Pascal law experimental provision of the utility model; Both can demonstrate the pressure that is added on the enclosed liquid, can size unchangeably by liquid to all directions transmission, checking Pascal law that again can be quantitative.Method is directly perceived, effective, the physical significance clear and definite.
Description of drawings
Fig. 1 is the synoptic diagram of a kind of Pascal law experimental provision of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment of the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the protection domain of the utility model.
To combine accompanying drawing that the embodiment of the invention is done to describe in detail further below.
The Pascal law experimental provision of the utility model, its preferable embodiment is as shown in Figure 1:
A kind of Pascal law experimental provision comprises: tank 1, Thin Elastic assembly, pressure-applying unit, piezometric tube group; Be full of water in the tank 1; The Thin Elastic assembly is located at the vessel port place of tank 1; Described Thin Elastic assembly comprises round hat plastic foil 14, tightens the vessel port place that the tubular part 3 of hat plastic foil 14 is fixed in tank 1 through tightening rope 15, with tank 1 sealing.
Pressure-applying unit is located at Thin Elastic assembly top; Described pressure-applying unit comprises scale pan 12 and counterweight 11; Scale pan 12 is located at hat plastic foil 14 upper surfaces of Thin Elastic assembly; Counterweight 11 is located in the scale pan 12.
The piezometric tube group is vertically installed in the outside of tank 1, comprises at least one high-order piezometric tube 6, at least one meta piezometric tube 8 and at least one low level piezometric tube 9; The opening of high-order piezometric tube 6 is positioned at the top of tank 1; The opening of meta piezometric tube 8 is positioned at the middle part of tank 1; The opening of low level piezometric tube 9 is positioned at the bottom of tank 1.
High-order piezometric tube 6 has two in this example, and meta piezometric tube 8 has one, and low level piezometric tube 9 has one.
Described high-order piezometric tube 6, the opening direction of meta piezometric tube 8 and low level piezometric tube 9 can be direction arbitrarily in tank 1 inside, comprise downwards, upwards, forward, backward, left, to the right or vergence direction or the like.
Reality can adopt any one piezometric tube at tank 1 the injecting process; But for the ease of using, described Pascal law experimental provision also comprises water inlet pipe 2, and water inlet pipe 2 is located at tank 1, and tank 1 is stretched in the inner.The outer end of said water inlet pipe 2 is provided with sebific duct 5, and said sebific duct 5 is provided with sebific duct folder 4.
In order to embody effect better, need to discharge the gas in the tank 1, described Pascal law experimental provision also comprises vent valve 13, vent valve 13 is located at Thin Elastic assembly top.
Simultaneously, for the ease of obtaining experimental result, described Pascal law experimental provision also comprises rule 10; Rule 10 and piezometric tube group are set in parallel in the side of tank 1.
Principle of work
1, at first will connect by device each several part shown in Figure 1, inspection sebific duct folder 4, vent valve 13 mouths of pipe in proper working order and circle hat plastic foil 14 and tank 1 are tightened, and do not have the situation of leaking.
2, open vent valve 13; Through water inlet pipe 2 water filling in tank 1, make inner deaeration, close vent valve 13 after being full of water; And make round hat plastic foil 14 after the surface has certain pressure intensity after the inner fills with water, 2 mouthfuls of tops that are higher than round hat plastic foil 14 of water inlet pipe just; Close the sebific duct folder 4 on the water inlet pipe 2, make its inner certain pressure intensity that keeps, the height of 8, one low level piezometric tube 9 inner water columns of 6, one meta piezometric tube of two high-order piezometric tube is all identical.
3, put a scale pan 12 at circle hat plastic foil 14 tops; And the counterweight 11 of the certain mass of portion's placement within it, can see, along with the difference of putting counterweight quality; Two high-order piezometric tube 6; The height of water column produces identical variation in 8, one low level piezometric tube of a meta piezometric tube 9, and the linear rising with the increase of counterweight quality.
Because the gravity of counterweight 11 is the tops that act directly on round hat plastic foil 14; Plastic foil is very soft, quite be that pressure acts directly on the liquid, and scale pan 12 base diameters is bigger; When its height and position has less variation, will make that water level produces bigger variation in the piezometric tube.
After if scale pan 12 is placed on round hat plastic foil 14 tops, the height of water column is h in 8, one low level piezometric tube of 6, one meta piezometric tube of two high-order piezometric tube 9
0,
Liquid internal pressure increment Delta P behind the placement counterweight
1Can be by Δ P
1=mg/s tries to achieve.
M---institute adds the counterweight quality;
G---acceleration of gravity;
S---scale pan floorage.
This pressure increment can size unchangeably by liquid to all directions transmission; As be delivered to bottom, middle part, side, top of tank 1 etc.; Can measure and add water colunm height h in 8, one low level piezometric tube of counterweight 6, one meta piezometric tube of latter two high-order piezometric tube 9
F, obtain high variable quantity and try to achieve, both:
ΔP
·2·＝ρg(h
·f·-h
·0·)
(h wherein
F-h
0) for after adding the counterweight that quality is m, the increment of water colunm height in each piezometric tube, ρ is the density of water.
The Δ P of each piezometric tube
2All identical.
Can be by calculating: Δ P
1=Δ P
2
In other words, in closed container, the pressure that puts on the inactive liquid will pass to each point simultaneously with equivalence.Here it is pascal's principle, or claim the Hydrostatic Transfer Device principle.
The utlity model has following characteristics:
Device is simple, all can be easy to form with the common laboratory existence conditions;
Reliability is high, as long as guarantee that the each several part junction is water-tight, valve is tight, all can accomplish experiment, and can realize quantitative test;
Method is directly perceived, effective, no matter is lecture experiment or quantitative experiment, all can directly observe and measure the physical significance clear and definite.
This experimental provision is as shown in Figure 1, can prove that not only the sealing fluid physical efficiency transmits pressure, and can prove that sealing fluid physical efficiency size transmits pressure unchangeably.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.
Claims (8)
1. a Pascal law experimental provision is characterized in that, comprising: tank (1), Thin Elastic assembly, pressure-applying unit, piezometric tube group;
The Thin Elastic assembly of sealing tank (1) is located at the vessel port place of tank (1), and tank is full of water in (1);
Pressure-applying unit is located at Thin Elastic assembly top;
The piezometric tube group vertically is provided with, and comprises at least one high-order piezometric tube (6), at least one meta piezometric tube (8) and at least one low level piezometric tube (9); The opening of high-order piezometric tube (6) is positioned at the top of tank (1); The opening of meta piezometric tube (8) is positioned at the middle part of tank (1); The opening of low level piezometric tube (9) is positioned at the bottom of tank (1).
2. Pascal law experimental provision according to claim 1 is characterized in that, described high-order piezometric tube (6), the opening direction of meta piezometric tube (8) and low level piezometric tube (9) comprise downwards, make progress, forward, backward, left, to the right or vergence direction.
3. Pascal law experimental provision according to claim 1 and 2 is characterized in that, described Thin Elastic assembly comprises round hat plastic foil (14), is fixed in the vessel port place of tank (1) through tightening rope (15).
4. Pascal law experimental provision according to claim 1 and 2 is characterized in that, described pressure-applying unit comprises scale pan (12) and counterweight (11); Scale pan (12) is located on the Thin Elastic assembly; Counterweight (11) is located in the scale pan (12).
5. Pascal law experimental provision according to claim 1 and 2 is characterized in that, said device also comprises water inlet pipe (2), and water inlet pipe (2) is located at tank (1), and tank (1) is stretched in the inner.
6. Pascal law experimental provision according to claim 5 is characterized in that, the outer end of said water inlet pipe (2) is provided with sebific duct (5), and said sebific duct (5) is provided with sebific duct folder (4).
7. Pascal law experimental provision according to claim 1 and 2 is characterized in that, said device also comprises vent valve (13), and vent valve (13) is located at Thin Elastic assembly top.
8. Pascal law experimental provision according to claim 1 and 2 is characterized in that, said device also comprises rule (10); Rule (10) and piezometric tube group are set in parallel in the side of tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203747047U CN202306907U (en) | 2011-09-29 | 2011-09-29 | Pascal's law experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203747047U CN202306907U (en) | 2011-09-29 | 2011-09-29 | Pascal's law experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202306907U true CN202306907U (en) | 2012-07-04 |
Family
ID=46375755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203747047U Expired - Fee Related CN202306907U (en) | 2011-09-29 | 2011-09-29 | Pascal's law experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202306907U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106043922A (en) * | 2015-04-13 | 2016-10-26 | 徐郁辉 | Floatable water storage bag with folding layer structure |
| CN108428395A (en) * | 2018-05-09 | 2018-08-21 | 黄琦 | Gasometry Pascal probes into demonstrator |
-
2011
- 2011-09-29 CN CN2011203747047U patent/CN202306907U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106043922A (en) * | 2015-04-13 | 2016-10-26 | 徐郁辉 | Floatable water storage bag with folding layer structure |
| US10156229B2 (en) | 2015-04-13 | 2018-12-18 | Yuh Huei Shyu | Floatable bellows container assembly |
| CN108428395A (en) * | 2018-05-09 | 2018-08-21 | 黄琦 | Gasometry Pascal probes into demonstrator |
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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: 20120704 Termination date: 20120929 |