CN204303226U - Demonstrator of liquid internal pressure - Google Patents
Demonstrator of liquid internal pressure Download PDFInfo
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- CN204303226U CN204303226U CN201420862449.4U CN201420862449U CN204303226U CN 204303226 U CN204303226 U CN 204303226U CN 201420862449 U CN201420862449 U CN 201420862449U CN 204303226 U CN204303226 U CN 204303226U
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- liquid
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- transparent hose
- transparent film
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Abstract
The utility model discloses a kind of demonstrator of liquid internal pressure, comprise demonstration device A, demonstration device B, it is characterized in that: demonstration device A is by transparent hose A(1), fixture A(2) and elastic transparent film A(3) form, transparent hose A(1) bottom is by fixture A(2) be connected with elastic transparent film A(3), demonstration device B is by transparent hose B(4), fixture B(5) and elastic transparent film B(6) form, transparent hose B(4) bottom is by fixture B(5) be connected with elastic transparent film B(6).Described transparent hose A(1) be turbination, transparent hose B(4) for cylindrical.The utility model is simple to operate, successful, intuitive are strong, economical and practical.
Description
Technical field
The utility model belongs to education experiment equipment technical field, relates in particular to a kind of demonstrator of liquid internal pressure.
Background technology
The pressure size of Study of Liquid inside is the very important content of compulsory education curricular standard laboratory textbooks, generally that U-tube Manometer can is inserted in a liquid in teaching, change the degree of depth inserting liquid, relatively the liquid level extent on U-tube both sides judges liquid internal pressure size, liquid level difference is larger, and liquid internal pressure is larger.But there is following shortcoming in the method:
1, cognitive stimulatory is inadequate, is difficult to motivate students' interest in learning.
2, directly perceived not, the visibility of observing the liquid level difference on U-tube both sides is poor.
3, closeness to life, friendliness are not strong not, and student in respect of mystique, can not reach learning objective to U-tube liquid pressure better.
In teaching, lecture experiment is made by oneself in order to overcome a lot of teacher of above shortcoming---the cylinder having the different aperture of a series of degree of depth at sidewall is placed on lectern top, then liquid is filled to cylinder, the range of demonstration aperture liquid, to illustrate the relation that liquid pressure increases with the increase of the degree of depth.But also there is following shortcoming in the method:
1, this demonstrating experiment device can not demonstrate with range size of spraying water the relation that liquid pressure increases with the increase of the degree of depth, and at grade, liquid depth is for container bottom and the plane of reference
, the current of aperture ejection can be considered level throw motion.Apart from level be
the flow velocity of the aperture fluid ejection water at place can be obtained by Bernoulli equation
, on the plane of reference range of current depend on current ejection time flow velocity and the flight time
, and the flight time is with the degree of depth
increase and reduce, water spray range can be expressed as
, ask extreme value at that time known, water spray range is maximum
although, the water spray flow velocity of small hole at bottom part
greatly, but it is little to the height of the plane of reference, does not have enough flight time, therefore its horizontal range is not maximum.The relation that therefore can not increase with the increase of the degree of depth with this demonstrating experiment device demonstration liquid pressure.According to above analysis, the experiment purpose demonstrating the relation that liquid pressure increases with the increase of the degree of depth be realized, a hard regular object must be padded below cylinder, to obtain enough flight time.
2, student easily produces the understanding of mistake, and think that water is filled with darker, the quality of water is larger, and the range of current is larger, is subject to pressure larger.
3, stimulus to the sense organ is inadequate, is difficult to motivate students' interest in learning.
The shape of the quality and container that 4, can not demonstrate liquid pressure and liquid has nothing to do.
Summary of the invention
A kind of simple to operate, demonstrator of liquid internal pressure that successful, intuitive are strong, economical and practical that the purpose of this utility model is to overcome above-mentioned shortcoming and provides.
The utility model object and solve its technical problem underlying and realize by the following technical solutions:
Demonstrator of liquid internal pressure of the present utility model, comprise demonstration device A, demonstration device B, wherein: demonstration device A is made up of transparent hose A, fixture A and elastic transparent film A, elastic transparent film A is connected with by fixture A bottom transparent hose A, demonstration device B is made up of transparent hose B, fixture B and elastic transparent film B, is connected with elastic transparent film B bottom transparent hose B by fixture B.
Aforesaid liquid internal pressure demonstration device, wherein: described transparent hose A and the equal both ends open of transparent hose B.
Aforesaid liquid internal pressure demonstration device, wherein: described transparent hose A is turbination, transparent hose B is cylindrical.
Aforesaid liquid internal pressure demonstration device, wherein: diameter, the transparent hose B of described transparent hose A and fixture A junction are all equal with the diameter of fixture B junction.
Aforesaid liquid internal pressure demonstration device, wherein: described fixture A is hollow body, it is identical that its diameter and transparent hose A connect elastic transparent film A port diameter.
Aforesaid liquid internal pressure demonstration device, wherein: described fixture B is hollow body, it is identical that its diameter and transparent hose B connect elastic transparent film B port diameter.
The utility model compared with the existing technology has obvious advantage and beneficial effect.From above technical scheme, simple demonstration device A by structure of the present utility model and demonstration device B carries out control variables and contrast experiment, can intuitively, clearly demonstrate the degree of depth of liquid internal pressure and liquid, the relation of density, and liquid pressure and liquid quality, container shapes are irrelevant etc.; Draw materials easily, cheap, almost can not spend just can make, all equipment can by the conventional daily necessities in life, as transparent hose can select waste and old two-tub washing machine water inlet pipe, elastic transparent film can be selected and blow quick-fried balloon or used sheath, and fixture can select the pen container or health products medicine bottle etc. of marking pen; Colored liquid can drip in running water several ink obtain, easy economy, and the observability enhancing experiment.In a word, the utility model is simple to operate, successful, intuitive are strong, economical and practical, and in applicable teaching process, liquid internal pressure demonstration promotes the use of.
Accompanying drawing explanation
Fig. 1 is the structural representation of demonstration device A;
Fig. 2 is the structural representation of demonstration device B;
Fig. 3 is embodiment one and the using state figure of demonstration device A in embodiment two;
Fig. 4 is the using state figure of demonstration device B in embodiment one;
Fig. 5 is the using state figure of demonstration device B in embodiment two;
Fig. 6 is a kind of using state figure of demonstration device A in embodiment three;
Fig. 7 is the another kind of using state figure of demonstration device A in embodiment three;
Fig. 8 is a kind of using state figure of demonstration device B in embodiment three;
Fig. 9 is the another kind of using state figure of demonstration device B in embodiment three.
Identify in figure:
1, transparent hose A; 2, fixture A; 3, elastic transparent film A; 4, transparent hose B; 5, fixture B; 6, elastic transparent film B; 7, colored liquid A; 8, colored liquid B.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, to according to demonstrator of liquid internal pressure detailed description of the invention, structure, feature and the effect thereof that the utility model proposes, be described in detail as follows.
See Fig. 1 to Fig. 2, demonstrator of liquid internal pressure of the present utility model, comprise demonstration device A, demonstration device B, wherein: demonstration device A is made up of transparent hose A1, fixture A2 and elastic transparent film A3, elastic transparent film A3 is connected with by fixture A2 bottom transparent hose A1, demonstration device B is made up of transparent hose B4, fixture B5 and elastic transparent film B6, is connected with elastic transparent film B6 bottom transparent hose B4 by fixture B5.Described transparent hose A1 and the equal both ends open of transparent hose B4.Described transparent hose A1 is turbination, and transparent hose B4 is cylindrical.Diameter, the transparent hose B4 of described transparent hose A1 and fixture A2 junction are all equal with the diameter of fixture B5 junction.Described fixture A2 is hollow body, and it is identical that its diameter and transparent hose A1 connect elastic transparent film A3 port diameter.Described fixture B5 is hollow body, and it is identical that its diameter and transparent hose B4 connect elastic transparent film B6 port diameter.
Embodiment one: demonstrate the identical same liquid of concentration in the same degree of depth, pressure is identical, and has nothing to do with the quality of liquid and the shape of container.
See Fig. 3 to Fig. 4, one end that turbination demonstration device A arranges elastic transparent film A3 is vertically placed down, the other end of hand-held transparent hose A1, with the colored liquid 7 that the concentration of graduated cylinder measured amounts is identical, all pour in demonstration device A, then one end that cylindrical demonstration device B arranges elastic transparent film B6 is vertically placed down, the other end of hand-held transparent hose B4, measure the identical colored liquid of as many concentration with graduated cylinder again, in demonstration device B, inject the liquid of height same with demonstration device A.Although do not observe colored liquid 7 volume of two containers dresses not etc., not etc., deep equality, the degree of convexity of two demonstration device bottom resilient transparent membranes is not identical for quality.Reach a conclusion: the identical same liquid of concentration is in the same degree of depth, and pressure is identical, and have nothing to do with the quality of liquid and the shape of container.In order to increase visibility and cost-saving, the ink that described colored liquid 7 can drip several in running water obtains.
Embodiment two: demonstrate the identical same liquid of concentration at different depth, pressure is not identical, and the degree of depth is darker, and the pressure of liquid is larger, and has nothing to do with the quality of liquid and the shape of container.
Method one: see Fig. 3 and Fig. 5, colored liquid of the same race 7 identical for concentration remaining in graduated cylinder in embodiment one is all poured in cylindrical demonstration device B, the liquid depth of the flowing fluid ratio demonstration device A now in demonstration device B is larger, the pressure that bottom is subject to liquid is also just larger, larger than elastic transparent film A3 of elastic transparent film B6 degree of convexity.Reach a conclusion: the identical same liquid of concentration is at different depth, and pressure is not identical, and the degree of depth is darker, and liquid pressure is larger, and have nothing to do with the quality of liquid and the shape of container.
Method two: with the colored liquid of the same race of the even concentration of graduated cylinder measured amounts, inject cylindrical demonstration device B, the right hand holds one end that transparent hose B4 connects elastic transparent film B6, the other end that left hand holds transparent hose B4 is kept certain height, first allow one end of transparent hose B4 connection elastic transparent film B6 equal with other end liquid level, be equivalent to a U-shaped pipe, observe the degree of convexity of now elastic transparent film B6, then one end of elastic transparent film B6 is allowed to move down, liquid depth is allowed to increase gradually, the radius of curvature just can observing elastic transparent film B6 intuitively increases gradually, when the vertical placement in alignment of transparent hose B4 two ends, elastic transparent film B6 becomes a bead, one end of elastic transparent film B6 is allowed up to move again, the colored liquid degree of depth is allowed to reduce gradually, the radius of curvature can observing elastic transparent film B6 intuitively reduces gradually, bead originally diminishes again gradually until disappear, when one end that transparent hose B4 connects elastic transparent film B6 is equal with other end liquid level, elastic transparent film B6 does not have projection, demonstrate the identical same liquid of concentration very intuitively at different depth, pressure is not identical, the degree of depth is darker, liquid pressure is larger.Finally change cylindrical demonstration device B into turbination demonstration device A and repeat above-mentioned experimentation, can reach a conclusion: the identical same liquid of concentration is at different depth, and pressure is not identical, and the degree of depth is darker, liquid pressure is larger, and has nothing to do with the quality of liquid and the shape of container.
Embodiment three: demonstrate the same degree of depth, fluid density is larger, and pressure is larger, and have nothing to do with the quality of liquid and the shape of container.
See Fig. 6 to Fig. 9, one end that identical two cylindrical demonstration device B arrange elastic transparent film B6 is vertically placed down, the other end of hand-held transparent hose B4, two kinds of colored liquids that density is different are injected respectively in two demonstration device B, and make the degree of depth injecting liquid in two demonstration device B identical, observe the degree of convexity of the elastic transparent film B6 of two demonstration device B bottoms.The degree of convexity observing the bottom elastic transparent film B6 of two demonstration device B is not identical, and the transparent membrane B6 degree of convexity of the demonstration device B at large liquid A 8 place of density be greater than density little liquid B 7.Illustrate that fluid density is larger in the same degree of depth, pressure is larger.Finally identical two cylindrical demonstration device B are changed into two identical obconic demonstration device A and repeat above-mentioned experimentation, can verify the same degree of depth, fluid density is larger, and pressure is larger, and has nothing to do with the quality of liquid and the shape of container.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, anyly do not depart from technical solutions of the utility model content, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (6)
1. a demonstrator of liquid internal pressure, comprise demonstration device A, demonstration device B, it is characterized in that: demonstration device A is by transparent hose A(1), fixture A(2) and elastic transparent film A(3) form, transparent hose A(1) bottom is by fixture A(2) be connected with elastic transparent film A(3), demonstration device B is by transparent hose B(4), fixture B(5) and elastic transparent film B(6) form, transparent hose B(4) bottom is by fixture B(5) be connected with elastic transparent film B(6).
2. demonstrator of liquid internal pressure as claimed in claim 1, is characterized in that: described transparent hose A(1) and transparent hose B(4) equal both ends open.
3. demonstrator of liquid internal pressure as claimed in claim 1 or 2, is characterized in that: described transparent hose A(1) be turbination, transparent hose B(4) for cylindrical.
4. demonstrator of liquid internal pressure as claimed in claim 1 or 2, is characterized in that: described transparent hose A(1) with fixture A(2) diameter, the transparent hose B(4 of junction) and with fixture B(5) diameter of junction is all equal.
5. demonstrator of liquid internal pressure as claimed in claim 1, is characterized in that: described fixture A(2) be hollow body, its diameter and transparent hose A(1) connect elastic transparent film A(3) port diameter is identical.
6. demonstrator of liquid internal pressure as claimed in claim 1, is characterized in that: described fixture B(5) be hollow body, its diameter and transparent hose B(4) connect elastic transparent film B(6) port diameter is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420862449.4U CN204303226U (en) | 2014-12-31 | 2014-12-31 | Demonstrator of liquid internal pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420862449.4U CN204303226U (en) | 2014-12-31 | 2014-12-31 | Demonstrator of liquid internal pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204303226U true CN204303226U (en) | 2015-04-29 |
Family
ID=53108750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420862449.4U Expired - Fee Related CN204303226U (en) | 2014-12-31 | 2014-12-31 | Demonstrator of liquid internal pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204303226U (en) |
-
2014
- 2014-12-31 CN CN201420862449.4U patent/CN204303226U/en not_active Expired - Fee Related
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| 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 |
Granted publication date: 20150429 Termination date: 20161231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |