CN112885206A - Buoyancy demonstration teaching aid for physical experiment - Google Patents
Buoyancy demonstration teaching aid for physical experiment Download PDFInfo
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- CN112885206A CN112885206A CN202110190551.9A CN202110190551A CN112885206A CN 112885206 A CN112885206 A CN 112885206A CN 202110190551 A CN202110190551 A CN 202110190551A CN 112885206 A CN112885206 A CN 112885206A
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- buoyancy
- sliding sleeve
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- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000004804 winding Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases
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- Level Indicators Using A Float (AREA)
Abstract
The invention discloses a buoyancy demonstration teaching aid for a physical experiment, which comprises an operation table, wherein the top of the operation table is provided with two containers. According to the invention, under the action of the second spring, the rubber block is tightly attached to the side wall of the upright column to fix the sliding sleeve, the end part of the sliding sleeve is positioned at the same height with the initial liquid level of the first liquid medium and the second liquid medium, when the pull ring is pulled and the limiting pin is separated from the limiting groove, the rotary disc rotates under the action of the gravity of the floating block, the moving block moves in the arc-shaped groove, the moving block moves towards two sides of the first transverse plate, the two floating blocks respectively drop in the two containers, the floating blocks float on the liquid level of the first liquid medium and the second liquid medium, and by observing the rising heights of the first liquid medium and the second liquid medium, the inference that the water displacement of an object in the liquid with different densities is different when the buoyancy borne by the object is constant can be visually and vividly verified, so that the teaching of teachers and the learning of the principle of the buoyancy.
Description
Technical Field
The invention relates to the technical field of teaching aids, in particular to a buoyancy demonstration teaching aid for a physical experiment.
Background
The force of an object immersed in a fluid being lifted vertically upwards by the fluid is called buoyancy. Buoyancy refers to the difference (resultant) in fluid pressure on each surface of an object in a fluid (liquid and gas). In 245 b.c., archimedes discovered the principle of buoyancy. The formula of buoyancy is defined as F-float = G row (namely the buoyancy of the object is equal to the gravity of the discharged liquid after the object sinks and stands still), and the formula F-float = p-liquid gV row (rho liquid represents the density of the liquid and is measured in kilograms/cubic meter; G represents a constant and is the ratio of the gravity to the mass, G =9.8N/kg can be measured in 10N/kg during rough calculation; and V row represents the volume of the discharged liquid and is measured in cubic meter) can be derived through calculation.
The derivation formula of the buoyancy can be used for obtaining that the displacement of the object in the liquid with different densities is different when the buoyancy of the object is fixed. However, due to the limitation of the traditional teaching aid, the traditional teaching aid is difficult to visually and vividly show the deduced conclusion to students, and is not beneficial to the students to learn the buoyancy principle.
Therefore, a buoyancy demonstration teaching aid for physical experiments is provided.
Disclosure of Invention
The invention aims to: in order to solve the problems, the buoyancy demonstration teaching aid for the physical experiment is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a buoyancy demonstration teaching aid for a physical experiment comprises an operating table, wherein two containers are arranged at the top of the operating table, a first liquid medium and a second liquid medium are arranged in the two containers in a one-to-one correspondence manner, stand columns are fixed at the top of the operating table, a first transverse plate and a second transverse plate are arranged between the stand columns, a rotary table is rotatably connected at the center of the first transverse plate through a rotating shaft, an arc-shaped groove is formed in the rotary table, a cavity is formed in the first transverse plate, a guide rod in the horizontal direction is arranged in the cavity, a movable block is sleeved outside the guide rod, the bottom end of the movable block penetrates into an inner cavity of the arc-shaped groove, a rope is wound on the movable block and penetrates through the first transverse plate and a floating block arranged at the bottom of the first transverse plate, a fixed block is installed at the top end of the rotating shaft, a rectangular limiting groove is formed in the top end of the fixed block, and a first spring and a flange are arranged outside the limiting pin.
As a further description of the above technical solution:
and the transverse plate I is provided with a guide wheel for guiding the rope.
As a further description of the above technical solution:
and a pull ring is formed at the top end of the limiting pin.
As a further description of the above technical solution:
the arc-shaped groove and the rotary table are eccentrically arranged.
As a further description of the above technical solution:
the density of the floating block is less than that of the first liquid medium and the second liquid medium.
As a further description of the above technical solution:
the outside of stand is equipped with the indicator with scale mark looks adaptation, the indicator establishes the outside sliding sleeve of stand including the cover, logical groove has on the sliding sleeve, it has two elastic connection of spring to run through the inner wall that has the block rubber and lead to the groove on the lateral wall that leads to the groove, fixed pull rod and pull rod run through to the outside of sliding sleeve on the lateral wall of block rubber.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, under the action of the second spring, the rubber block is tightly attached to the side wall of the upright column to fix the sliding sleeve, the end part of the sliding sleeve is positioned at the same height with the initial liquid level of the first liquid medium and the second liquid medium, when the pull ring is pulled and the limiting pin is separated from the limiting groove, the rotary disc rotates under the action of the gravity of the floating block, the moving block moves in the arc-shaped groove, the moving block moves towards two sides of the first transverse plate, the two floating blocks respectively drop in the two containers, the floating blocks float on the liquid level of the first liquid medium and the second liquid medium, and by observing the rising heights of the first liquid medium and the second liquid medium, the inference that the water displacement of an object in the liquid with different densities is different when the buoyancy borne by the object is constant can be visually and vividly verified, so that the teaching of teachers and the learning of the principle of the buoyancy.
2. According to the invention, the transverse plate I is provided with the guide wheel, and the guide wheel guides the rope, so that friction between the rope and the transverse plate I is avoided, the floating block moves more smoothly, and the experiment is facilitated.
Drawings
FIG. 1 is a schematic diagram illustrating a demonstration teaching aid according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating a partial enlarged structure A provided in accordance with an embodiment of the present invention;
FIG. 3 illustrates a schematic structural view of an indicator provided according to an embodiment of the present invention;
fig. 4 is a schematic top view illustrating a fixing block according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a turntable structure provided in accordance with an embodiment of the present invention;
illustration of the drawings:
1. an operation table; 2. a container; 3. a first liquid medium; 4. a second liquid medium; 5. scale lines; 6. a first transverse plate; 7. a transverse plate II; 8. a guide wheel; 9. a cavity; 10. a guide bar; 11. a pull ring; 12. a turntable; 13. a rope; 14. a floating block; 15. a column; 16. an indicator; 17. a first spring; 18. a flange; 19. a moving block; 20. a fixed block; 21. a rotating shaft; 22. a spacing pin; 23. a limiting groove; 24. an arc-shaped slot; 1601. a sliding sleeve; 1602. a through groove; 1603. a pull rod; 1604. a second spring; 1605. a rubber block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a buoyancy demonstration teaching aid for physical experiments comprises an operating table 1, wherein two containers 2 are arranged at the top of the operating table 1, a first liquid medium 3 and a second liquid medium 4 are arranged in the two containers 2 in a one-to-one correspondence manner, the densities of the first liquid medium 3 and the second liquid medium 4 are different, stand columns 15 are fixed at the top of the operating table 1, a first transverse plate 6 and a second transverse plate 7 are arranged between the stand columns 15, a rotary plate 12 is rotatably connected to the center of the first transverse plate 6 through a rotary shaft 21, the rotary plate 12 is sleeved with the bottom of the rotary shaft 21, the rotary shaft 21 is rotatably connected with the first transverse plate 6 through a bearing, an arc-shaped groove 24 is arranged on the rotary plate 12, the arc-shaped groove 24 and the rotary plate 12 are eccentrically arranged, a cavity 9 is arranged on the first transverse plate 6, a guide rod 10 in the horizontal direction is arranged in the cavity 9, two ends of, the moving block 19 is in sliding fit with the guide rod 10, the bottom end of the moving block 19 penetrates into an inner cavity of the arc-shaped groove 24, a rope 13 is connected to the moving block 19 in a winding mode, the rope 13 penetrates through the first transverse plate 6 and is connected with a floating block 14 arranged at the bottom of the first transverse plate 6 in a winding mode, a fixing block 20 is installed at the top end of the rotating shaft 21, a rectangular limiting groove 23 is formed in the top end of the fixing block 20, a limiting pin 22 clamped with the limiting groove 23 penetrates through the second transverse plate 7, a first spring 17 and a flange 18 are arranged outside the limiting pin 22, the first spring 17 is arranged outside the limiting pin 22 in a sleeved mode, two ends of the first spring 17 are respectively abutted to the second transverse plate 7 and the flange 18, under the effects of the first spring 17 and the flange 18, the limiting pin 22 is clamped with the limiting groove 23, and due to the fact that the limiting groove 23 is rectangular, the fixing block.
Specifically, as shown in fig. 1, the transverse plate one 6 is provided with a guide wheel 8 for guiding the rope 13, the guide wheel 8 is connected with the rope 13 in a winding manner, and the guide wheel 8 guides the rope 13, so that friction between the rope 13 and the transverse plate one 6 is avoided, the floating block 14 moves more smoothly, and the experiment is facilitated.
Specifically, as shown in fig. 1, a pull ring 11 is formed at the top end of the limit pin 22, and the pull ring 11 can facilitate pulling of the limit pin 22 by a worker, thereby facilitating operation of a user.
Specifically, as shown in fig. 1, the density of the floating block 14 is less than the densities of the first liquid medium 3 and the second liquid medium 4, and when the floating block 14 is located inside the container 2, the floating block 14 floats on the liquid surfaces of the first liquid medium 3 and the second liquid medium 4, and in this state, the gravity of the floating block 14 is equal to the buoyancy of the floating block.
Specifically, as shown in fig. 1 and fig. 3, the outside of the upright 15 is provided with an indicator 16 adapted to the scale mark 5, the indicator 16 includes a sliding sleeve 1601 sleeved outside the upright 15, the sliding sleeve 1601 is in sliding fit with the upright 15, the sliding sleeve 1601 is provided with a through groove 1602, a rubber block 1605 penetrates through the side wall of the through groove 1602, the rubber block 1605 is elastically connected to the inner wall of the through groove 1602 through a second spring 1604, two ends of the second spring 1604 are respectively abutted to the inner walls of the rubber block 1605 and the through groove 1602, a pull rod 1603 is fixed on the side wall of the rubber block 1605, the pull rod 1603 penetrates through the outside of the sliding sleeve 1601, the second spring 1604 is sleeved outside the pull rod 1603, and the pull rod 1603 can facilitate the pulling of the worker on the rubber block 1605.
The working principle is as follows: in the experiment, the pull rod 1603 is pulled to one side, the pull rod 1603 drives the rubber block 1605 to separate from the upright post 15, in this state, a user can move the sliding sleeve 1601 as required, when the end of the sliding sleeve 1601 is positioned at the same height with the initial liquid level of the liquid medium I3 and the liquid medium II 4, the pull rod 1603 is loosened, under the action of the spring II 1604, the rubber block 1605 is tightly attached to the side wall of the upright post 15, the sliding sleeve 1601 is fixed, the pull ring 11 is pulled upwards, the pull ring 11 drives the limit pin 22 to separate from the inside of the limit groove 23, the limit on the fixed block 20, the rotating shaft 21 and the rotating disc 12 is released, under the action of the self gravity of the floating block 14, the floating block 14 moves downwards, the floating block 14 moves the moving block 19 through the rope 13, the moving block 19 moves inside the arc-shaped groove 24 and outside the guide rod 10, after the floating block 14 falls inside the two containers 2, because the density of the floating block 14 is less than the density of the first liquid medium 3 and the second liquid medium 4, the floating block 14 floats on the liquid level of the first liquid medium 3 and the second liquid medium 4, in this state, the gravity of the floating block 14 is equal to the received buoyancy, and because the mass and the volume of the two floating blocks 14 are the same, the buoyancy received by the two floating blocks 14 is also equal, and by observing the rising height of the liquid level of the first liquid medium 3 and the second liquid medium 4 (the rising height of the liquid level is equal to the displacement), the inference that the displacement of the object in the liquid with different densities is different when the buoyancy received by the object is constant can be visually verified, thereby being beneficial to the teaching of teachers and the learning of students on the principle of buoyancy.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. The utility model provides a buoyancy demonstration teaching aid for physics experiment, includes operation panel (1), the top of operation panel (1) is equipped with two containers (2), two the inside one-to-one of container (2) is equipped with liquid medium one (3) and liquid medium two (4), its characterized in that, the top of operation panel (1) is fixed with stand (15), be equipped with diaphragm one (6) and diaphragm two (7) between stand (15), the center department of diaphragm one (6) rotates through axis of rotation (21) and is connected with carousel (12), two arc wall (24) have on carousel (12), diaphragm one (6) are provided with cavity (9) respectively in the both sides department of skew center, and the inside of cavity (9) is equipped with guide arm (10) on the horizontal direction, the outside cover of guide arm (10) is equipped with movable block (19), the bottom of movable block (19) penetrates the inner chamber of arc wall (24), a rope (13) is connected to the moving block (19) in a winding manner, the rope (13) penetrates through the first transverse plate (6) and is connected with a floating block (14) arranged at the bottom of the first transverse plate (6) in a winding manner, a fixed block (20) is installed at the top end of the rotating shaft (21), a rectangular limiting groove (23) is formed in the top end of the fixed block (20), a limiting pin (22) clamped with the limiting groove (23) penetrates through the second transverse plate (7), and a first spring (17) and a flange (18) are arranged outside the limiting pin (22);
the top end of the limiting pin (22) is formed with a pull ring (11), the arc-shaped groove (24) and the rotary disc (12) are eccentrically arranged, and the density of the floating block (14) is smaller than that of the liquid medium I (3) and the liquid medium II (4).
2. The buoyancy demonstration teaching aid for physical experiments according to claim 1, characterized in that an indicator (16) matched with the scale marks (5) is arranged outside the upright post (15), the indicator (16) comprises a sliding sleeve (1601) sleeved outside the upright post (15), a through groove (1602) is formed in the sliding sleeve (1601), the inner wall of the through groove (1602) penetrated by a rubber block (1605) and the inner wall of the rubber block (1605) and the through groove (1602) are elastically connected through a second spring (1604), and a fixed pull rod (1603) and a pull rod (1603) are penetrated by the outer side of the sliding sleeve (1601) on the side wall of the rubber block (1605).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110190551.9A CN112885206A (en) | 2020-10-13 | 2020-10-13 | Buoyancy demonstration teaching aid for physical experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110190551.9A CN112885206A (en) | 2020-10-13 | 2020-10-13 | Buoyancy demonstration teaching aid for physical experiment |
| CN202011090098.6A CN111933002B (en) | 2020-10-13 | 2020-10-13 | A buoyancy demonstration teaching aid for physical experiment |
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| CN202011090098.6A Division CN111933002B (en) | 2020-10-13 | 2020-10-13 | A buoyancy demonstration teaching aid for physical experiment |
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| CN112885206A true CN112885206A (en) | 2021-06-01 |
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| CN202110190551.9A Pending CN112885206A (en) | 2020-10-13 | 2020-10-13 | Buoyancy demonstration teaching aid for physical experiment |
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| CN112958171A (en) * | 2021-02-10 | 2021-06-15 | 谭策 | Environment-friendly chemical reagent accommodate device that chemical engineering used |
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- 2020-10-13 CN CN202110190551.9A patent/CN112885206A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111933002B (en) | 2021-02-09 |
| CN111933002A (en) | 2020-11-13 |
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Application publication date: 20210601 |