CN204884328U - Buoyancy demonstration device - Google Patents

Abstract

The utility model discloses a buoyancy demonstration device, it is including being equipped with the box of the aqueous solution, the surface of the aqueous solution concatenates the little plastic buoy of taking the cavity in the box through the string, the both ends of string still concatenate first big plastic buoy and the second largest plastic buoy of taking the cavity respectively, are equipped with the pump body in it respectively, be equipped with gas outlet, water inlet and delivery port on the pump body respectively, stretch out the outlet duct of box passes respectively the upper end of first big plastic buoy and second largest plastic buoy is with corresponding the gas outlet intercommunication of the pump body is connected at every inlet tube on the pump body water inlet passes the lower extreme and the water solution phase intercommunication of first big plastic buoy and second largest plastic buoy, every the delivery port of the pump body passes through the outlet pipe setting and is in in the cavity of first big plastic buoy and second largest plastic buoy, adopt above -mentioned structure, realized simple structure, but direct observation, the understanding of being convenient for, results of learning are the easy effect of accepting well.

Description

Buoyancy demonstrating device

Technical field

The utility model relates to a kind of demonstration device for teaching, particularly relates to a kind of buoyancy demonstration device for physical teaching purpose.

Background technology

Teacher is when teaching buoyancy one and saving, and be immersed in the object in liquid, can be subject to the effect of gravity and buoyancy, when buoyancy is greater than gravity, object floats over liquid surface; When buoyancy equals gravity, object floats on a liquid; When buoyancy is less than gravity, object sinks in a liquid, adopts this teaching method not understand the principle that buoyancy produces and student should not be allowed to accept, the effect of impact study.

Summary of the invention

It is simple that the purpose of this utility model is to provide a kind of structure, can directly observe, and is convenient to understand, the good acceptant buoyancy demonstrating device of results of learning.

The technical solution of the utility model is a kind of buoyancy demonstrating device, it comprises the casing 1 of a transparency, described casing 1 is built with aqueous solution 2, it is characterized in that: in described casing 1, the surface of aqueous solution 2 is serially connected with the identical little plastic buoy 3 of band three of cavity by cord 5, left end and the right-hand member of described cord 5 are also serially connected with identical first plastic buoy 4 and the second largest plastic buoy 12 of band cavity respectively, the pump housing 6 is respectively equipped with in described first plastic buoy 4 and second largest plastic buoy 12, the described pump housing 6 is respectively equipped with gas outlet, water inlet and water delivering orifice, the escape pipe 7 stretching out described casing 1 is each passed through described first plastic buoy 4 and is communicated with the gas outlet of the corresponding described pump housing 6 with the upper end of second largest plastic buoy 12, the water inlet pipe 9 be connected on each described pump housing 6 water inlet is connected with aqueous solution 2 with the lower end of second largest plastic buoy 12 through described first plastic buoy 4, the water delivering orifice of each described pump housing 6 is arranged in the cavity of described first plastic buoy 4 and second largest plastic buoy 12 by rising pipe 8.

The technical solution of the utility model also have each described little plastic buoy 3 outside surface on be respectively equipped with some waterproof luminous sources 10.

The technical solution of the utility model also has the free end of each described escape pipe 7 and water inlet pipe 9 to be respectively equipped with solenoid valve 11.

The technical solution of the utility model also has the volume of described first plastic buoy 4 and second largest plastic buoy 12 cavity to be four times of each described little plastic buoy 3 cavity volume.

The beneficial effects of the utility model are serially connected with the identical little plastic buoy 3 of three of band cavity by the surface of aqueous solution 2 in described casing 1 by cord 5, left end and the right-hand member of described cord 5 are also serially connected with identical first plastic buoy 4 and the second largest plastic buoy 12 of band cavity respectively, the pump housing 6 is respectively equipped with in described first plastic buoy 4 and second largest plastic buoy 12, the described pump housing 6 is respectively equipped with gas outlet, water inlet and water delivering orifice, the escape pipe 7 stretching out described casing 1 is each passed through described first plastic buoy 4 and is communicated with the gas outlet of the corresponding described pump housing 6 with the upper end of second largest plastic buoy 12, the water inlet pipe 9 be connected on each described pump housing 6 water inlet is connected with aqueous solution 2 with the lower end of second largest plastic buoy 12 through described first plastic buoy 4, the water delivering orifice of each described pump housing 6 is arranged on by rising pipe 8 in the cavity of described first plastic buoy 4 and second largest plastic buoy 12, during demonstration, by open-minded for solenoid valve 11, first start first plastic buoy 4 inner pump 6, constantly water inlet in the cavity of this first plastic buoy 4, along with the continuous increase of inflow, this first plastic buoy 4 sinks, and drive three little plastic buoys 3 to sink, when in first plastic buoy 4 cavity, water fills, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 vertical stand in the water surface, wherein, second largest plastic buoy 12 floats over water surface, show that the weight of first plastic buoy 4 and water is greater than the buoyancy of three little plastic buoys 3 and is less than the buoyancy of second largest plastic buoy 12 and three little plastic buoys 3, now, start the second largest plastic buoy 12 interior ground pump housing 6 floated on the surface, constantly intake in cavity along with this second largest plastic buoy 12, vertical first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 are to sinking, if now close the pump housing 6 of second largest plastic buoy 12, vertical first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 rest on the optional position of aqueous solution 2 in casing 1, show that the weight of first plastic buoy 4 and water and second largest plastic buoy 12 and the weight of water and the buoyancy of three little plastic buoys 3 are equal, if continue the pump housing 6 starting second largest plastic buoy 12, keep into water in the cavity of second largest plastic buoy 12, vertical first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 continue to sink, and show that the weight of first plastic buoy 4 and water and the weight of second largest plastic buoy 12 and water are greater than the buoyancy of first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3, in addition, can also start in first plastic buoy 4 and the pump housing 6 of second largest plastic buoy 12 simultaneously, when in first plastic buoy 4 and when entering a small amount of water in the cavity of second largest plastic buoy 12, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 are in bending arc in the horizontal direction to sinking, close the pump housing 6 simultaneously, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 rest on the optional position of aqueous solution 2 in casing 1, continue to start the pump housing 6 simultaneously, constantly intake in first plastic buoy 4 and in the cavity of second largest plastic buoy 12, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 continue to sink, demonstrate the object be immersed in liquid like this, can be subject to the effect of gravity and buoyancy, when buoyancy is greater than gravity, object floats over liquid surface, when buoyancy equals gravity, object floats on a liquid, when buoyancy is less than gravity, the principle that object sinks in a liquid, achieves structure simple, can directly observe, and is convenient to understand, the good acceptant effect of results of learning.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model

In Fig. 11, casing, 2, aqueous solution, 3, little plastic buoy, 4, first plastic buoy, 5, cord, 6, the pump housing, 7, escape pipe, 8, rising pipe, 9, water inlet pipe, 10, waterproof luminous source, 11, solenoid valve, 12, second largest plastic buoy.

Embodiment

According to Fig. 1, the utility model relates to a kind of buoyancy demonstrating device, it comprises the casing 1 of a transparency, described casing 1 is built with aqueous solution 2, in described casing 1, the surface of aqueous solution 2 is serially connected with the identical little plastic buoy 3 of band three of cavity by cord 5, the outside surface of each described little plastic buoy 3 is respectively equipped with some waterproof luminous sources 10, and object has the convenient observation in waterproof luminous source 10, and it is more clear especially to observe at night, left end and the right-hand member of described cord 5 are also serially connected with identical first plastic buoy 4 and the second largest plastic buoy 12 of band cavity respectively, the volume of described first plastic buoy 4 and second largest plastic buoy 12 cavity is four times of each described little plastic buoy 3 cavity volume, the pump housing 6 is respectively equipped with in described first plastic buoy 4 and second largest plastic buoy 12, the described pump housing 6 is respectively equipped with gas outlet, water inlet and water delivering orifice, the escape pipe 7 stretching out described casing 1 is each passed through described first plastic buoy 4 and is communicated with the gas outlet of the corresponding described pump housing 6 with the upper end of second largest plastic buoy 12, the water inlet pipe 9 be connected on each described pump housing 6 water inlet is connected with aqueous solution 2 with the lower end of second largest plastic buoy 12 through described first plastic buoy 4, the free end of each described escape pipe 7 and water inlet pipe 9 is respectively equipped with solenoid valve 11, the water delivering orifice of each described pump housing 6 is arranged on by rising pipe 8 in the cavity of described first plastic buoy 4 and second largest plastic buoy 12, during demonstration, by open-minded for solenoid valve 11, first start first plastic buoy 4 inner pump 6, constantly water inlet in the cavity of this first plastic buoy 4, along with the continuous increase of inflow, this first plastic buoy 4 sinks, and drive three little plastic buoys 3 to sink, when in first plastic buoy 4 cavity, water fills, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 vertical stand in the water surface, wherein, second largest plastic buoy 12 floats over water surface, show that the weight of first plastic buoy 4 and water is greater than the buoyancy of three little plastic buoys 3 and is less than the buoyancy of second largest plastic buoy 12 and three little plastic buoys 3, now, start the second largest plastic buoy 12 interior ground pump housing 6 floated on the surface, constantly intake in cavity along with this second largest plastic buoy 12, vertical first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 are to sinking, if now close the pump housing 6 of second largest plastic buoy 12, vertical first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 rest on the optional position of aqueous solution 2 in casing 1, show that the weight of first plastic buoy 4 and water and second largest plastic buoy 12 and the weight of water and the buoyancy of three little plastic buoys 3 are equal, if continue the pump housing 6 starting second largest plastic buoy 12, keep into water in the cavity of second largest plastic buoy 12, vertical first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 continue to sink, and show that the weight of first plastic buoy 4 and water and the weight of second largest plastic buoy 12 and water are greater than the buoyancy of first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3, in addition, can also start in first plastic buoy 4 and the pump housing 6 of second largest plastic buoy 12 simultaneously, when in first plastic buoy 4 and when entering a small amount of water in the cavity of second largest plastic buoy 12, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 are in bending arc in the horizontal direction to sinking, close the pump housing 6 simultaneously, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 rest on the optional position of aqueous solution 2 in casing 1, continue to start the pump housing 6 simultaneously, constantly intake in first plastic buoy 4 and in the cavity of second largest plastic buoy 12, first plastic buoy 4, second largest plastic buoy 12 and three little plastic buoys 3 continue to sink, demonstrate the object be immersed in liquid like this, can be subject to the effect of gravity and buoyancy, when buoyancy is greater than gravity, object floats over liquid surface, when buoyancy equals gravity, object floats on a liquid, when buoyancy is less than gravity, the principle that object sinks in a liquid, achieves structure simple, can directly observe, and is convenient to understand, the good acceptant effect of results of learning.

Claims (4)

1. a buoyancy demonstrating device, it comprises the casing (1) of a transparency, described casing (1) is built with aqueous solution (2), it is characterized in that: the surface of described casing (1) interior aqueous solution (2) is serially connected with the identical little plastic buoy (3) of three of band cavity by cord (5), left end and the right-hand member of described cord (5) are also serially connected with identical first plastic buoy (4) and the second largest plastic buoy (12) of band cavity respectively, the pump housing (6) is respectively equipped with in described first plastic buoy (4) and second largest plastic buoy (12), (6) are respectively equipped with gas outlet with the described pump housing, water inlet and water delivering orifice, the escape pipe (7) stretching out described casing (1) is each passed through described first plastic buoy (4) and is communicated with the gas outlet of the corresponding described pump housing (6) with the upper end of second largest plastic buoy (12), the water inlet pipe (9) be connected on each described pump housing (6) water inlet is connected with aqueous solution (2) with the lower end of second largest plastic buoy (12) through described first plastic buoy (4), the water delivering orifice of each described pump housing (6) is arranged in the cavity of described first plastic buoy (4) and second largest plastic buoy (12) by rising pipe (8).

2. buoyancy demonstrating device according to claim 1, is characterized in that: the outside surface of each described little plastic buoy (3) is respectively equipped with some waterproof luminous sources (10).

3. buoyancy demonstrating device according to claim 1, is characterized in that: the free end of each described escape pipe (7) and water inlet pipe (9) is respectively equipped with solenoid valve (11).

4., according to the arbitrary described buoyancy demonstrating device of claims 1 to 3, it is characterized in that: the volume of described first plastic buoy (4) and second largest plastic buoy (12) cavity is four times of each described little plastic buoy (3) cavity volume.