CN201503658U - Buoyance demonstration device - Google Patents

Abstract

The utility model relates to a teaching aid, in particular to a buoyance demonstration device. The buoyance demonstration device is characterized in that a spring balance is hung on a bracket, and a fine line hung on the spring balance is connected with a buoy through a fixed pulley at the bottom of a water tank; after the water tank is filled with water, the buoy can float on the water surface; and if the float is removed, a balloon can replace the float. The utility model has the benefits that various buoyance experiments made through the buoyance demonstration device can enable students to understand that the buoyance is vertical, and when the object is submerged in the water fully, the size of the buoyance of the object is unrelated to the depth of the object submerged in water. When the float is replaced by the balloon, the volume of the balloon is reduced along with the increase of the depth submerged in water, and the buoyance becomes small. Therefore, the students can scientifically think questions, and be free from the influence of the thinking set.

Description

Buoyancy demonstrator

Technical field

The utility model relates to a kind of teaching aid.

Background technology

In experimental teaching, the student can see material object intuitively, thus the profound understanding content of courses.The teaching aid of buoyancy experiment is more, does not improve but still have in the recent period significantly.

Summary of the invention

The purpose of this utility model is that a kind of buoyancy demonstrator will be provided, and buoyancy demonstrator is made up of support, pond, fixed pulley, floating drum, spring balance and balloon, fine rule.When doing experiment, earlier spring balance is hung on the support, the spring balance hook is gone up and is connected a fine rule; Fix a fixed pulley on the end in pond, will hang over fine rule hanging sleeve on the spring balance on fixed pulley, the other end with fine rule is connected with a floating drum again; Water on irritating in the pond at last floats on the water surface floating drum, can carry out the experiment that buoyancy size and object immerse the relation of volume size in the water.If floating drum is removed, change balloon, can carry out balloon buoyancy and hydraulic pressure and increase the registration increase of spring balance with the increase that balloon immerses the degree of depth of water by force; When balloon increases because of the water-immersed degree of depth, the volume of balloon dwindles thereupon, and water also diminishes to the buoyancy of balloon, and the registration of spring balance diminishes.In like manner, when balloon rises in water,, make the volume of balloon become big owing to the pressure of water to balloon diminishes.

Buoyancy demonstrator is made up of support, pond, fixed pulley, floating drum, spring balance and balloon, fine rule.Buoyancy demonstrator is that spring balance is hung on the support, and the spring balance hook is gone up and connected a fine rule; Fix a fixed pulley on the end in pond, will hang over fine rule hanging sleeve on the spring balance on fixed pulley, the other end with fine rule is connected with a floating drum again; Water on irritating in the pond at last floats on the water surface floating drum; If floating drum is removed, change balloon.

Description of drawings

Fig. 1 is the structural representation of buoyancy demonstrator.

Embodiment

With reference to Fig. 1, buoyancy demonstrator is made up of support 1, pond 2, fixed pulley 3, floating drum 4, spring balance 5 and balloon 6, fine rule 7.Buoyancy demonstrator is that spring balance 5 is hung on the support 1, and spring balance 5 hooks are gone up and connected a fine rule 7; Fix a fixed pulley 3 on the end in pond 2, will hang over fine rule 7 hanging sleeves on the spring balance 5 on fixed pulley 3, the other end with fine rule 7 is connected with a floating drum 4 again; Water on irritating in pond 2 at last floats on the water surface floating drum 4; If floating drum 4 is removed, can change balloon 6, do the buoyancy experiment of balloon 6.

Claims (1)

1. buoyancy demonstrator is made up of demonstration device support, spring balance, pond and ball float, it is characterized in that buoyancy demonstrator is to hang with spring balance (5) on the support (1), connects a fine rule (7) on spring balance (5) hook; On the end of pond (2), fix a fixed pulley (3), hang over fine rule (7) on the spring balance (5) and walk around fixed pulley (3) and be connected with floating drum (4); Floating drum (4) removes, the replaceable balloon (6) of going up.

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