CN212411421U

CN212411421U - Liquid buoyancy demonstrator

Info

Publication number: CN212411421U
Application number: CN202021468218.7U
Authority: CN
Inventors: 常鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-01-26
Anticipated expiration: 2030-07-21

Abstract

The utility model discloses a liquid buoyancy demonstrator, which comprises a transparent container filled with liquid, a transparent hollow tube body arranged at the bottom in the transparent container and completely immersed in the liquid, a sealing washer and a vent pipe; the sealing washer is clamped between the inner bottom surface of the transparent container and the bottom end surface of the transparent hollow tube body, and the sealing washer covers the bottom end surface of the transparent hollow tube body; the two ends of the transparent hollow tube body are respectively provided with an elastic membrane and a pressing ring, and the elastic membranes are tightened at the two ends of the transparent hollow tube body through the pressing rings to form a sealed cavity capable of containing air; the transparent hollow tube body is provided with a vent hole, one end of the vent tube is communicated with the sealing cavity through the vent hole, and the other end of the vent tube is communicated with the atmosphere outside the liquid level. The utility model discloses a liquid buoyancy demonstration ware has simple structure, easily operation, demonstration effect audio-visual characteristics, is convenient for the student to the understanding of liquid buoyancy.

Description

Liquid buoyancy demonstrator

Technical Field

The utility model relates to a physics experiment teaching aid, especially a liquid buoyancy demonstration ware.

Background

In the physical course teaching of the liquid buoyancy of middle school, students understand more abstract and lack perceptual knowledge due to the lack of visual demonstration models or teaching aids. Although the liquid buoyancy is demonstrated by using traditional experimental props such as wax blocks, table tennis balls and the like, the phenomenon that the liquid buoyancy is borne by an object in liquid cannot be intuitively demonstrated. When the object is immersed in the liquid, the lower surface of the object is subjected to the upward pressure of the liquid more than the upper surface of the object is subjected to the downward pressure of the liquid, and the difference between the upward pressure and the downward pressure is the reason for generating the buoyancy. The traditional conventional experiment teaching aid cannot demonstrate the phenomena, so that the understanding and mastering of students are influenced, and the ideal teaching effect of teachers cannot be achieved.

SUMMERY OF THE UTILITY MODEL

To the weak point of traditional experiment teaching aid among the prior art, demonstrate the intuition for improving the experiment, deepen the student to the understanding of liquid buoyancy, the utility model provides a liquid buoyancy demonstration ware.

The utility model discloses a liquid buoyancy demonstrator, which comprises a transparent container filled with liquid, a transparent hollow tube body arranged at the bottom in the transparent container and completely immersed in the liquid, a sealing washer and a vent pipe; the sealing washer is clamped between the inner bottom surface of the transparent container and the bottom end surface of the transparent hollow tube body, and the sealing washer covers the bottom end surface of the transparent hollow tube body; the two ends of the transparent hollow tube body are respectively provided with an elastic membrane and a pressing ring, the edge part of the elastic membrane is tightly clamped between the pressing ring and the transparent hollow tube body, and the middle part of the elastic membrane is stretched at the two ends of the transparent hollow tube body to form a sealed cavity capable of containing air; the transparent hollow pipe body is provided with a vent hole, one end of the vent pipe is communicated with the sealing cavity through the vent hole, and the other end of the vent pipe is communicated with the atmosphere outside the liquid level.

Furthermore, the sealing washer is provided with a washer through hole, the position of the washer through hole corresponds to the center of the bottom end face of the transparent hollow tube body, and the size of the washer through hole is smaller than that of the bottom end face of the transparent hollow tube body.

Furthermore, a container through hole is formed in the bottom of the transparent container, the position of the container through hole corresponds to the center of the bottom end face of the transparent hollow tube body, the size of the container through hole is smaller than that of the bottom end face of the transparent hollow tube body, and a detachable hole plug is arranged on the container through hole.

Further, the transparent hollow tube body is a cylinder or a cuboid.

Further, the press ring is made of an elastic material; the sealing gasket is made of an elastic sealing material.

Further, the vent pipe is an elastic hose.

The utility model has the advantages that: the transparent container and the transparent hollow tube body enable students to easily observe the deformation of the elastic membrane; the design of the compression rings and the elastic membranes at two ends of the transparent hollow tube body and the adoption of the same elastic membrane clamping and stretching method can ensure that the elastic membranes are stretched at two ends of the transparent hollow tube body at the same degree of tightness as much as possible, thereby ensuring the experimental effect; the vent pipe is communicated with the atmosphere outside the liquid level, so that the air pressure inside the sealing cavity is the same as the atmospheric pressure; when the transparent hollow tube body is completely immersed in liquid and is arranged at the bottom of the transparent container, the sealing washer, the gasket through hole and the container through hole between the transparent hollow tube body and the transparent container are designed, so that the bottom end face of the transparent hollow tube body is not subjected to liquid pressure, only is subjected to atmospheric pressure, and the atmospheric pressure is smaller than the downward pressure of the liquid on the top end face of the transparent hollow tube body, so that the transparent hollow tube body cannot float upwards, at the moment, the elastic membrane on the bottom end face of the transparent hollow tube body is obviously observed to be in a flat and deformation-free state, and the elastic membrane on the top end face is in a; after the through hole of the container at the bottom of the transparent container is plugged by the plug, the transparent hollow tube body is vertically and completely immersed in the liquid but does not contact the bottom of the transparent container, the upward pressure of the liquid on the bottom end face of the transparent hollow tube body is greater than the downward pressure of the liquid on the top end face, and the pressure difference is the reason for generating buoyancy, so that the upward deformation degree of the elastic membrane on the bottom end face of the transparent hollow tube body can be obviously observed to be greater than the downward deformation degree of the elastic membrane on the top end face.

Drawings

Fig. 1 is a schematic view of the utility model in a use state 1;

fig. 2 is a schematic view of the utility model in use state 2;

FIG. 3 is a schematic view of the structure of the transparent hollow tube of the present invention;

FIG. 4 is a schematic view of the structure of the sealing washer of the present invention;

FIG. 5 is a schematic view of the structure of the compression ring of the present invention;

FIG. 6 is a schematic view of the structure of the elastic membrane of the present invention;

in the figure: 1. a transparent container; 2. a transparent hollow tube body; 3. a sealing gasket; 4. an elastic film; 5. pressing a ring; 6. a breather pipe; 7. a vent hole; 8. a washer through hole; 9. a container through hole; 10. and (4) plugging the hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1-6, a liquid buoyancy demonstrator is characterized in that: comprises a transparent container 1 filled with liquid, a transparent hollow tube body 2 which is arranged at the bottom in the transparent container 1 and is completely immersed in the liquid, a sealing gasket 3 and an air pipe 6; the sealing washer 3 is clamped between the inner bottom surface of the transparent container 1 and the bottom end surface of the transparent hollow tube body 2, and the sealing washer 3 covers the bottom end surface of the transparent hollow tube body 2; the two ends of the transparent hollow tube body 2 are respectively provided with an elastic membrane 4 and a pressing ring 5, the edge part of the elastic membrane 4 is tightly clamped between the pressing ring 5 and the transparent hollow tube body 2, and the middle part of the elastic membrane 4 is stretched at the two ends of the transparent hollow tube body 2 to form a sealed cavity capable of containing air; the transparent hollow tube body 2 is provided with a vent hole 7, one end of the vent pipe 6 is communicated with the sealed cavity through the vent hole 7, and the other end of the vent pipe 6 is communicated with the atmosphere outside the liquid level.

The sealing washer 3 is provided with a washer through hole 8, the position of the washer through hole 8 corresponds to the center of the bottom end face of the transparent hollow tube body 2, and the size of the washer through hole 8 is smaller than that of the bottom end face of the transparent hollow tube body 2.

The bottom of the transparent container 1 is provided with a container through hole 9, the position of the container through hole 9 corresponds to the center of the bottom end face of the transparent hollow tube body 2, the size of the container through hole 9 is smaller than that of the bottom end face of the transparent hollow tube body 2, and the container through hole 9 is provided with a detachable hole plug 10.

The transparent hollow tube body 2 is a cylinder or a cuboid.

The compression ring 5 is made of an elastic material; the sealing gasket 3 is made of an elastic sealing material.

The vent pipe 6 is an elastic hose.

As shown in fig. 1, when the transparent hollow tube 2 is completely immersed in the liquid and is disposed at the bottom of the transparent container 1, because the sealing gasket 3 is disposed between the transparent hollow tube 2 and the transparent container 1, and the sealing gasket 3 is provided with the gasket through hole 8, and the container through hole 9 is disposed at the bottom of the transparent container 1, only the atmospheric pressure is applied to the bottom end surface of the transparent hollow tube 2, and the atmospheric pressure is smaller than the downward pressure of the liquid applied to the top end surface of the transparent hollow tube 2, so that the transparent hollow tube 2 cannot float upward. At this time, the observed phenomena are: the elastic membrane at the bottom end face of the transparent hollow tube body 2 is flat and has no deformation, and the elastic membrane at the top end face of the transparent hollow tube body 2 is sunken downwards and deforms. Therefore, the pressure of the liquid is intuitively demonstrated, and the bottom end face of the transparent hollow tube body 2 is free from the pressure of the liquid, the top end face of the transparent hollow tube body is subjected to the downward pressure of the liquid, and the transparent hollow tube body 2 is pressed at the bottom of the transparent container 1 under the downward pressure action of the liquid on the top end face and cannot float upwards.

As shown in fig. 2, after the container through hole 9 at the bottom of the transparent container 1 is plugged by the plug 10, when the transparent hollow tube 2 is completely immersed in the liquid and does not contact the bottom of the transparent container 1, the upward pressure of the liquid at the bottom end of the transparent hollow tube 2 is greater than the downward pressure of the liquid at the top end, and this pressure difference is the cause of the buoyancy, and the observed phenomenon is: the elastic membrane of the bottom end face of the transparent hollow tube body 2 deforms upwards, the elastic membrane of the top end face of the transparent hollow tube body 2 deforms downwards, and the degree of upward deformation of the elastic membrane of the bottom end face is larger than the degree of downward deformation of the elastic membrane of the top end face. Therefore, the pressure and buoyancy of the liquid are intuitively demonstrated, which shows that the upward pressure of the liquid on the bottom end surface of the transparent hollow tube body 2 is greater than the downward pressure of the liquid on the top end surface, and the buoyancy of the transparent hollow tube body 2 is the pressure difference between the upward pressure of the liquid on the bottom end surface and the downward pressure of the liquid on the top end surface, so that the transparent hollow tube body 2 can float upwards as long as the buoyancy is greater than the gravity of the transparent hollow tube body 2.

The utility model discloses a theory of operation is: through the transparent design of the transparent container and the transparent hollow tube body, students can easily observe the deformation of the elastic membrane, so that the liquid pressure borne by the top end surface and the bottom end surface of the transparent hollow tube body can be intuitively known; through the design of the pressing rings and the elastic membranes at two ends of the transparent hollow tube body and the adoption of the same elastic membrane clamping method, the edge part of the elastic membrane is clamped between the transparent hollow tube body and the pressing rings, so that the sealing performance of the sealing cavity is ensured, and the elastic membranes are in the same tightening degree as far as possible; the air pressure in the sealing cavity is the same as the atmospheric pressure through the air pipe and the atmosphere outside the liquid level, so that the elastic membrane deforms towards the inner cavity of the transparent hollow pipe body, and the deformation of the elastic membrane is easier to observe and compare; transparent cavity body submergence is in liquid completely, arranges transparent container bottom in as transparent cavity body, through seal ring, packing ring through-hole and the container through-hole design between transparent cavity body and the transparent container, makes the unable come-up of transparent cavity body, and does not arrange transparent container bottom in as transparent cavity body, but the contrast experiment of transparent cavity body can come-up, has more deepened the understanding of student to liquid buoyancy.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a liquid buoyancy demonstration ware which characterized in that: comprises a transparent container (1) filled with liquid, a transparent hollow tube body (2) which is arranged at the bottom in the transparent container (1) and is completely immersed in the liquid, a sealing washer (3) and a vent pipe (6); the sealing washer (3) is clamped between the inner bottom surface of the transparent container (1) and the bottom end surface of the transparent hollow tube body (2), and the sealing washer (3) covers the bottom end surface of the transparent hollow tube body (2); the two ends of the transparent hollow tube body (2) are respectively provided with an elastic membrane (4) and a pressing ring (5), the edge part of the elastic membrane (4) is tightly clamped between the pressing ring (5) and the transparent hollow tube body (2), and the middle part of the elastic membrane (4) is stretched at the two ends of the transparent hollow tube body (2) to form a sealed cavity capable of containing air; the transparent hollow pipe body (2) is provided with a vent hole (7), one end of the vent pipe (6) is communicated with the sealed cavity through the vent hole (7), and the other end of the vent pipe (6) is communicated with the atmosphere outside the liquid level.

2. The liquid buoyancy demonstrator according to claim 1, wherein: the sealing washer (3) is provided with a washer through hole (8), the position of the washer through hole (8) corresponds to the center of the bottom end face of the transparent hollow tube body (2), and the size of the washer through hole (8) is smaller than that of the bottom end face of the transparent hollow tube body (2).

3. The liquid buoyancy demonstrator according to claim 1, wherein: the bottom of the transparent container (1) is provided with a container through hole (9), the position of the container through hole (9) corresponds to the center of the bottom end face of the transparent hollow tube body (2), the size of the container through hole (9) is smaller than that of the bottom end face of the transparent hollow tube body (2), and the container through hole (9) is provided with a detachable hole plug (10).

4. The liquid buoyancy demonstrator according to claim 1, wherein: the transparent hollow tube body (2) is a cylinder or a cuboid.

5. The liquid buoyancy demonstrator according to claim 1, wherein: the compression ring (5) is made of an elastic material; the sealing washer (3) is made of an elastic sealing material.

6. The liquid buoyancy demonstrator according to claim 1, wherein: the vent pipe (6) is an elastic hose.