CN205104112U - Physical demonstration device - Google Patents

Abstract

The utility model discloses a physical demonstration device, which comprises a transparent box body and a buoyancy ball. The inner cavity of the transparent box body is provided with a buoyancy ball. The lower end of the measuring cup is provided with a measuring cup, the bottom end of the measuring cup is provided with a supporting platform, the top of the buoyancy ball is provided with a weighted inlet, the buoyancy ball is connected with the inflatable air bag through the inflation pipe, and the buoyancy ball is connected to the tension measuring instrument through the pull wire connect. This physical demonstration device, after filling the transparent box with liquid, can put some gravity blocks on the buoyancy ball through the weighted inlet, which can demonstrate the influence of mass on buoyancy, and can demonstrate the impact of volume on buoyancy by inflating the buoyancy ball with air The effect of pulling the tension measuring instrument through the pull ring can demonstrate the influence of the pulling force on the buoyancy, greatly reducing the measurement error, and can measure multiple factors together, and at the same time provide a very good demonstration effect for students.

Description

A physical demonstration device

technical field

The utility model relates to the technical field of physical devices, in particular to a physical demonstration device.

Background technique

At present, with the continuous deepening of educational theories, experimental teaching, as an important tool for students to directly understand nature and understand the basic laws of the development and changes of natural things, and as an important part of natural teaching, is receiving more and more attention. It is not only helpful for students to better acquire knowledge, but also plays an important role in improving students' skills and abilities in various aspects, cultivating learning interests and hobbies, and forming good scientific literacy. Therefore, choosing and using appropriate Experimental teaching aids have become a key part of a good experimental class. With the continuous deepening of natural teaching reforms, teaching content is also changing. Traditional experimental teaching aids can no longer keep up with the changing needs of teaching materials, and many of them are no longer applicable in teaching materials. There is an urgent need to add new teaching instruments and experimental equipment. This is the need for teaching reform and the development of education. Verifying the buoyancy of an object in a liquid is one of the basic experiments in physical experiments. In the physics experiment of buoyancy, the object immersed in the liquid discharges a certain volume of liquid, and the gravity of this part of the volume of liquid is equal to the buoyancy of the object. In the long-term teaching practice, the teacher uses the buoyancy device to press the experimental object During the process of entering the liquid, due to the uneven force on the test object, the test object is easy to detach, which is inconvenient to operate, and the test object swings back and forth in the liquid container unstable, resulting in large errors in the experimental results. The presentation is not good.

Utility model content

The purpose of this utility model is to provide a physical demonstration device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions: a physical demonstration device, including a transparent box and a buoyancy ball, the inner cavity of the transparent box is provided with a buoyancy ball, and the outer wall on the right side of the transparent box A water outlet is provided, and the lower end of the water outlet is provided with a measuring cup, the bottom end of the measuring cup is provided with a support platform, the rear side of the support platform is provided with a drain valve, and the top of the buoyancy ball is provided with a weighted inlet, and the weighted The inlet is connected to the cap through a connecting pin, the buoyancy ball is connected to the inflatable air bag through an inflatable pipe, the buoyancy ball is connected to the tension measuring instrument through a pull wire, and the pull wire runs through the outer wall of the transparent box, and the left side of the tension measuring instrument is set With pull ring.

Preferably, the bottom four corners of the transparent box are provided with anti-skid pads.

Preferably, magnetic sealing rings are provided around the weighted inlet and the cap.

Preferably, scales are provided on the outer wall of the transparent box.

Preferably, a measuring cup storage tank is provided at the connection between the support platform and the measuring cup.

Compared with the prior art, the beneficial effect of the utility model is: the physical demonstration device, after filling the transparent box with liquid, can put some gravity blocks of the buoyancy ball through the weighted inlet, and can demonstrate the influence of the mass on the buoyancy , Inflate the buoyancy ball through the inflatable air bag, you can demonstrate the influence of volume on buoyancy, you can pull the tension measuring instrument through the pull ring, you can demonstrate the influence of tension on buoyancy, greatly reducing the measurement error, and multiple factors can be measured together, greatly The usage rate is improved, and at the same time, a very good demonstration effect is provided to the students.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Transparent box body, 2. Pull wire, 3. Tension measuring instrument, 4. Pull ring, 5. Inflatable air bag, 6. Inflatable pipeline, 7. Buoyancy ball, 8. Weighted entrance, 9. Cap, 10, Magnetic sealing ring, 11, water outlet, 12, measuring cup, 13, support platform, 14, measuring cup storage tank, 15, drainage valve, 16, anti-slip mat, 17, scale.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, the utility model provides a kind of technical scheme: a kind of physical demonstration device, comprises transparent box body 1 and buoyancy ball 7, and the inner chamber of described transparent box body 1 is provided with buoyancy ball 7, and described transparent box body The four corners of the bottom end of 1 are provided with anti-skid pads 16, the effect of anti-slip pads 16 is to prevent the transparent box body 1 from slipping and unstable on the desk, the outer wall of the transparent box body 1 is provided with scales 17, the A water outlet 11 is provided on the right side outer wall of the transparent casing 1, and a measuring cup 12 is provided at the lower end of the water outlet 11, and a supporting platform 13 is provided at the bottom of the measuring cup 12, and the connection between the supporting platform 13 and the measuring cup 12 There is a measuring cup storage tank 14. The function of the measuring cup storage tank 14 is to make the measuring cup 12 be placed on the support platform 13 more stably. If there is too much liquid in the transparent box 1, or the buoyancy ball 7 enters the liquid during the demonstration , the liquid rises, and the liquid can be discharged into the measuring cup 12 through the water outlet 11. The rear side of the support table 13 is provided with a drain valve 15, and the top of the buoyancy ball 7 is provided with a weighted inlet 8, and the weighted inlet 8 is connected to The pin is connected to the cap 9, and the weighted inlet 8 and the cap 9 are surrounded by a magnetic sealing ring 10. The function of the magnetic sealing ring 10 is to make no gap between the weighted inlet 8 and the cap 9, preventing liquid from penetrating into the buoyancy ball 7 , some gravity blocks can be put into the buoyancy ball 7 through the weighting inlet 8, and the influence of the mass on the buoyancy can be demonstrated. The buoyancy ball 7 is connected to the inflatable air bag 5 through the inflation pipeline 6, and the buoyancy ball 7 is inflated by the inflatable air bag 5, which can To demonstrate the impact of volume on buoyancy, the buoyancy ball 7 is connected to the tension measuring instrument 3 through the backguy 2, and the backguy 2 runs through the outer wall of the transparent box 1, and the left side of the tension measuring instrument 3 is provided with a pull ring 4, which can By pulling the pull gauge 3 through the pull ring 4, the influence of the pull force on the buoyancy can be demonstrated.

After filling the transparent box 1 with liquid, you can put some gravity blocks on the buoyancy ball 7 through the weighted inlet 8, which can demonstrate the influence of mass on buoyancy, and inflate the buoyancy ball 7 through the inflatable airbag 5, and you can demonstrate the impact of volume on buoyancy The impact of the tension measuring instrument 3 can be pulled through the pull ring 4, which can demonstrate the influence of the pulling force on the buoyancy, greatly reducing the measurement error, and can measure multiple factors together, greatly improving the utilization rate, and at the same time providing students with a very good Demonstration effect, if there is too much liquid in the transparent box 1, or the buoyancy ball 7 enters the liquid during the demonstration process, the liquid rises, and the liquid can be discharged into the measuring cup 12 through the water outlet 11. After use, the liquid can be drained Valve 15 discharges the liquid.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (5)

1. a physics demonstration device, comprise transparent cabinet and buoyant spheres, the inner chamber of described transparent cabinet is provided with buoyant spheres, it is characterized in that: the outer right wall of described transparent cabinet is provided with water delivering orifice, and the lower end of water delivering orifice is provided with measuring cup, the bottom of described measuring cup is provided with brace table, the rear side of described brace table is provided with water discharging valve, the top of described buoyant spheres is provided with increases the weight of entrance, and increase the weight of entrance by connecting pin with block be connected, described buoyant spheres is connected with air bag by gas ducting, described buoyant spheres is connected with tension measuring appliance by bracing wire, and bracing wire runs through the outer wall of transparent cabinet, the left side of described tension measuring appliance is provided with draw ring.

2. a kind of physics demonstration device according to claim 1, is characterized in that: the corner, bottom of described transparent cabinet is equipped with slipmat.

3. a kind of physics demonstration device according to claim 1, is characterized in that: the outer wall of described transparent cabinet is provided with scale.

4. a kind of physics demonstration device according to claim 1, is characterized in that: described in increase the weight of entrance and block surrounding be equipped with magnetic gasket.

5. a kind of physics demonstration device according to claim 1, is characterized in that: the junction of described brace table and measuring cup is provided with measuring cup accumulator tank.