CN219574992U - Cup-covering experiment demonstration device for physical teaching - Google Patents
Cup-covering experiment demonstration device for physical teaching Download PDFInfo
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- CN219574992U CN219574992U CN202320553463.5U CN202320553463U CN219574992U CN 219574992 U CN219574992 U CN 219574992U CN 202320553463 U CN202320553463 U CN 202320553463U CN 219574992 U CN219574992 U CN 219574992U
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Abstract
The utility model discloses a cup-covering experiment demonstration device for physical teaching, which relates to the technical field of physical teaching equipment and comprises a cup body, a hard cover plate and a weight; the cup body is internally filled with liquid, a round hole is formed in the center of the bottom, and a rubber plug is plugged in the round hole; the sealing gasket is adhered to the upper part of the hard cover plate, and the hard straight pipe with the piston and the hook is adhered to the lower part of the hard cover plate. When the device is adopted to carry out cup covering experiments, the widening of a liquid gap between a cup opening and a cover plate is not caused, and a weight can be applied to a hook below the hard cover plate, so that the liquid and the hard cover plate can not fall off. The cup covering experiment is carried out by adopting the device, so that the existence of the atmospheric pressure can be verified, the atmospheric pressure can be intuitively proved to be large by applying a weight to the lower part of the hook, the scientific principle can be intuitively demonstrated conveniently, and the cognition and the interest of students on the scientific phenomenon can be improved.
Description
Technical Field
The utility model relates to the technical field of physical teaching equipment, in particular to a cup-covering experiment demonstration device for physical teaching.
Background
The cup-covering experiment is a classroom demonstration experiment commonly used in basic education stage physics subjects, and the existing experimental operation in the teaching material is as follows: firstly, filling water into a flat-mouth cup, then covering the mouth of the cup by using a water-impermeable paper sheet, then pressing the paper sheet by using a palm to invert the cup, and after the hand is loosened, the paper sheet at the mouth of the cup and the water in the cup cannot fall down, namely, the paper sheet supports the water in the cup, so that the existence of atmospheric pressure is verified. However, experiments and researches show that if a heavy object is directly applied below a cover plate of the existing cup covering experimental device, the experiment is very easy to fail, because a gap exists between a cup rim and the cover plate due to the surface tension of liquid after the cup is covered, in the form of a liquid film, if the heavy object is applied, the gap is widened and broken, and then the outside air can enter the cup through the gap, so that the experiment fails. Therefore, the existing cup-covering experiment can only verify the existence of atmospheric pressure, and cannot intuitively prove that the atmospheric pressure is very high.
Disclosure of Invention
The utility model aims to provide a cup-covering experiment demonstration device for physical teaching, which can not only verify the existence of atmospheric pressure, but also intuitively prove that the atmospheric pressure is very high.
The aim of the utility model is achieved by the following technical scheme.
A cup-covering experiment demonstration device for physical teaching comprises a cup body, a hard cover plate and a weight; the cup body is internally filled with liquid, a round hole is formed in the center of the bottom, and a rubber plug is plugged in the round hole; the sealing gasket is adhered to the upper part of the hard cover plate, and the hard straight pipe with the piston and the hook is adhered to the lower part of the hard cover plate.
Preferably, the cup body is made of transparent hard plastic or glass, and a round hole with the diameter of 5mm is formed in the center of the bottom.
Preferably, the diameter of the rubber plug is 5mm, and the rubber plug can be plugged with the round hole at the bottom of the cup body.
Preferably, the liquid is water, alcohol, oil or other nuisance free liquid.
Preferably, the sealing gasket is made of soft plastic or rubber, the shape of the sealing gasket is a circular ring, a groove is formed in the upper portion of the sealing gasket, the groove is buckled with the cup opening of the cup body to prevent leakage of air, and the lower portion of the sealing gasket is bonded with the hard cover plate.
Preferably, the hard cover plate is a transparent plastic plate or a glass plate with a smooth upper surface.
Preferably, the hard straight pipe is a transparent plastic pipe or a glass pipe with a smooth inner surface.
Preferably, the head part of the piston is made of rubber, and the rest is made of plastic.
Preferably, the hook is made of plastic.
Preferably, the weight is made of iron, and a hook is arranged above the weight.
Preferably, a hole with the diameter of 3cm is arranged in the center of the hard cover plate; the inner diameter of the cross section of the hard straight pipe is 3cm, and the hard straight pipe is in seamless adhesion with the central hole of the hard cover plate; the diameter of the head part of the piston is 3cm, and the piston can slide in the hard straight tube; the hook is adhered to the bottom of the piston.
The beneficial effects of the utility model are as follows: the cup covering experiment is carried out by adopting the device, so that the existence of the atmospheric pressure can be verified, the atmospheric pressure can be intuitively proved to be large by applying a weight to the lower part of the hook, the scientific principle can be intuitively demonstrated conveniently, and the cognition and the interest of students on the scientific phenomenon can be improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
FIG. 2 is a schematic view of the structure of the cup body of the present utility model.
FIG. 3 is a schematic diagram of a hard cover plate according to the present utility model.
In the figure: 1. the cup body 2, the rubber stopper 3, the liquid 4, the sealing washer 5, the hard cover plate 6, the hard straight tube 7, the piston 8, the hook 9 and the heavy object.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the present utility model provides a technical solution: a cup-covering experiment demonstration device for physical teaching comprises a cup body 1, a hard cover plate 5 and a weight 9; the cup body is internally filled with liquid 3, a round hole is formed in the center of the bottom, and a rubber plug 2 is plugged in the round hole; a sealing gasket 4 is adhered to the upper part of the hard cover plate 5, and a hard straight pipe 6 with a piston 7 and a hook 8 is adhered to the lower part of the hard cover plate; a groove is formed above the sealing gasket 4 and buckled with the cup mouth of the cup body 1 to prevent air leakage, and the lower part of the groove is adhered with the hard cover plate 5; the center of the hard cover plate 5 is provided with a hole, and the hole is bonded with the hard straight pipe 6 in a seamless manner; the head of the piston 7 can slide inside the rigid straight tube 6; the hook 8 is adhered to the bottom of the piston 7.
The specific operation process of the utility model is as follows: during experiments, the rubber plug 2 is plugged into the bottom of the cup body 1, the cup opening of the cup body 1 is upwards, the liquid 3 is added, the groove of the sealing gasket 4 is buckled with the cup opening of the cup body 1 by the other hand, the piston 7 in the hard straight tube 6 is pushed to the bottom, then the hard cover plate 5 is pressed down, cup covering operation is rapidly carried out, at the moment, the hand pressing the hard cover plate 5 is released, at the moment, the water 3 and the hard cover plate 5 in the cup can not fall under the action of atmospheric pressure, if the weight 9 is properly added to the hook 8, the piston 7 is pulled to move downwards by the weight 9, negative pressure is formed in the cup body 1, the widening of a liquid gap between the cup opening of the cup body 1 and the hard cover plate 5 can not be caused, at the moment, the liquid 3 and the hard cover plate 5 in the cup still can not fall, at the moment, the liquid 3 and the hard cover plate 5 in the cup can fall off, the atmospheric pressure is verified, the atmospheric pressure can be well, the phenomenon can be visually demonstrated, and the cognitive principle of the atmospheric pressure and the atmospheric pressure of students can be improved.
Although embodiments of the present utility model have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (3)
1. Cup-covering experiment demonstration device for physical teaching is characterized in that: comprises a cup body, a hard cover plate and a heavy object; the cup body is internally filled with liquid, a round hole is formed in the center of the bottom, and a rubber plug is plugged in the round hole; the sealing gasket is adhered to the upper part of the hard cover plate, and the hard straight pipe with the piston and the hook is adhered to the lower part of the hard cover plate.
2. The cup-covering experimental demonstration device for physical teaching according to claim 1, wherein: the sealing gasket is made of soft plastic or rubber, the shape of the sealing gasket is a circular ring, a groove is formed in the upper portion of the sealing gasket and buckled with the cup opening of the cup body to prevent air leakage, and the lower portion of the sealing gasket is adhered to the hard cover plate.
3. The cup-covering experimental demonstration device for physical teaching according to claim 1, wherein: the center of the hard cover plate is provided with a hole with the diameter of 3 cm; the inner diameter of the cross section of the hard straight pipe is 3cm, and the hard straight pipe is in seamless adhesion with the central hole of the hard cover plate; the diameter of the head part of the piston is 3cm, and the piston can slide in the hard straight tube; the hook is adhered to the bottom of the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320553463.5U CN219574992U (en) | 2023-03-21 | 2023-03-21 | Cup-covering experiment demonstration device for physical teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320553463.5U CN219574992U (en) | 2023-03-21 | 2023-03-21 | Cup-covering experiment demonstration device for physical teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219574992U true CN219574992U (en) | 2023-08-22 |
Family
ID=87657119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320553463.5U Active CN219574992U (en) | 2023-03-21 | 2023-03-21 | Cup-covering experiment demonstration device for physical teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219574992U (en) |
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2023
- 2023-03-21 CN CN202320553463.5U patent/CN219574992U/en active Active
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