CN2403090Y

CN2403090Y - Buoyancy generating cause demonstrator

Info

Publication number: CN2403090Y
Application number: CN 99247164
Authority: CN
Inventors: 桑宗武
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-23
Filing date: 1999-11-23
Publication date: 2000-10-25
Anticipated expiration: 2009-11-23

Abstract

The utility model relates to a buoyancy generating cause demonstrator, belonging to the technical field of a physics teaching appliance. The utility model comprises a transparent container; a middle bottom used for dividing the container into an upper container and a lower container is arranged in the container; a floating bottom hole and other two small holes are arranged on the middle bottom; a bending pipe and an exhaust pipe are respectively arranged on each small hole and are firmly connected with the middle bottom, and no water is leaked; floats with small density are covered on the floating bottom hole; the floats are firmly contacted with the middle bottom, and no water is leaked; the floats are lower than the bending pipe; when the utility model is used, the water is firstly filled in the container, the floats are all immersed, the surface of the water is lower than the bending pipe, and the floats do not float upwards; when the surface of the water reaches the height of the bending pipe, the floats float upwards.

Description

Buoyancy produces the reason demonstration device

The utility model belongs to physics educational apparatus, and particularly a kind of buoyancy produces the apparatus for demonstrating of reason.

The reason that buoyancy produces is the emphasis in the physics teaching, and present conventional teaching is just carried out abstract preach in theory, does not have instrument to experimentize, and becomes the big difficult point of one in the teaching, is starved of the instruments used for education of this respect at present.

The purpose of this utility model just provides a kind of demonstration device that can demonstrate buoyancy generation reason intuitively.

It comprises transparent container the utility model, the end in the middle of in container, establishing one, the middle end, be divided into upper container and following container with container, on the middle end, open a floating bottom outlet and two apertures, on two apertures, press dress bend pipe and gas outlet respectively, and tightly be connected with the middle end, water-tight, at the less float of floating bottom outlet loam cake one density, and float will tightly contact water-tight with the middle end and float will be lower than bend pipe.

Earlier push down floating bottom outlet during use with float cover, in upper container, add water again, make the whole submergence floats of water, but the water surface will be lower than bend pipe, water can not be flow to down in the container, at this moment, float is owing to the pressure that is subjected to make progress less than water, so can not float, if in container, add water again, as long as the water surface arrives the bend pipe height, water just flows to down in the container along bend pipe, and the water of float lower surface contact at this moment just is subjected to the pressure that water makes progress, because the pressure that makes progress is greater than downward pressure, float just is subjected to water and makes progress and downward pressure differential, promptly is subjected to buoyancy, so will float.

The utility model has following advantage and function: it is that object is subjected to liquid upwards and downward pressure differential that (1) this instrument can visual pattern convincingly demonstrates reason that buoyancy produces; (2) the utility model can ocular demonstration all be immersed in the water and be subjected to buoyancy when float; (3) demonstration that can image all is immersed in the water when float, and the water surface does not produce buoyancy when being lower than bend pipe, when the water surface reaches the height of bend pipe, just produce buoyancy, make the float come-up, therefore experiment has dense interest, can effectively motivate students' interest in learning and develops student's intelligence.

The utility model is described in further detail below in conjunction with drawings and Examples

Fig. 1 is the utility model structural representation;

Fig. 2 is the structural representation at the middle end.

It comprises transparent container 1 embodiment that accompanying drawing provides, the end 2 in the middle of in container 1, establishing one, the middle end, be divided into upper container 3 and following container 4 with container 1, on the middle end, open a floating bottom outlet 5 and two apertures 6 and 7, on aperture 6 and 7, be separately installed with bend pipe 8 and gas outlet 9, and tightly be connected with the middle end, water-tight, at floating bottom outlet 5, the float 10 that loam cake one density is less, and float will tightly contact water-tight with the middle end and float will be lower than bend pipe, and float can adopt more showy color and the material that can float in water is made.

Claims

1. a buoyancy produces the reason demonstration device, it is characterized in that it comprises transparent container (1), the end (2) in the middle of in container, establishing one, the middle end, be divided into upper container (3) and following container (4) with container (1), on the middle end, open floating bottom outlet (5) and two apertures (6) and (7), on aperture (6) and (7), press dress bend pipe (8) and gas outlet (9) respectively, and tightly be connected water-tight with the middle end, at the less float (10) of floating bottom outlet (5) loam cake one density, and float and the middle end, will tightly contact water-tight, and float will be lower than bend pipe.