CN202362984U

CN202362984U - Demonstration instrument for water spray phenomenon inside negative air pressure flask

Info

Publication number: CN202362984U
Application number: CN2011202068227U
Authority: CN
Inventors: 周礼邦; 陆林元
Original assignee: SECOND MIDDLE SCHOOL JIADING DISTRICT SHANGHAI
Current assignee: SECOND MIDDLE SCHOOL JIADING DISTRICT SHANGHAI
Priority date: 2011-06-17
Filing date: 2011-06-17
Publication date: 2012-08-01
Anticipated expiration: 2021-06-17

Abstract

The utility model relates to a demonstration instrument for a water spray phenomenon inside a negative air pressure flask, and the instrument can be used for teaching of physics in junior and senior high schools. The utility model aims to provide a teaching instrument that enables students to directly observe a phenomenon. On the basis of a common experiment flask, a rubber bottle stopper is plugged on the port of the flask, two holes are disposed in the rubber bottle stopper, an upper hose and a lower hose are respectively inserted into the two holes, the upper hose extends into an upper container, and the lower hose extends into a lower container. The upper container and the lower container are communicated to each other, and a certain amount of water is filled in the upper container. When the lower hose is full of water, the lower hose is put into the lower container, and the water in the lower hose flows downward because of dead weight of water so that negative pressure is generated by the air in the flask. Water in the upper container, under the effect of atmospheric pressure, keeps flowing into the flask that is under a negative pressure condition via the upper hose. A rubber nozzle is arranged on the top of the upper hose and a plurality of small round holes with the same diameter are disposed in the nozzle, so that the water sprayed looks like the form of fireworks.

Description

Water spray phenomenon demonstrator in the negative pressure flask

Technical field:

The utility model relates to a kind of physics educational apparatus, can in the junior-senior high school physics teaching, use.

Background technology:

There is atmospheric pressure in earth surface; The people lives under the normal pressure but is anti-subtle after being accustomed to; This instrument directly be not connected with atmospheric pressure; Owing to two waters surface that communicate of pipe have difference in height to cause negative pressure in the flask, by the water in the higher water surface container, being pushed down in atmospheric effect becomes the water spray wonder in the flask.

The purpose of the utility model is can supply the teaching of student's Direct observation to use instrument in order to solve.

Summary of the invention:

Utilize the flask of common experiment usefulness, on the burning mouth, be plugged with bottle closure of rubber, make a call to two holes on the bottle closure of rubber, plug upper hose and downcomer in two holes respectively, in the supreme surface vessel of upper hose, downcomer passes to down in the surface vessel.Upper and lower two containers are communicated, a certain amount of water is housed in the upper container, after filling water in the downcomer, put into down container; Make the gas in the flask produce negative pressure owing to the deadweight of water in the downcomer flows downward, the water in the upper container passes through upper hose under atmospheric effect; Constantly flow into and be in the flask under the negative pressure; The rubber nozzle is equipped with at the upper hose top, and the identical small sircle hole of a plurality of diameters is arranged on the rubber nozzle, can make the water of ejection form the fireworks display shape.

The method of application of the utility model is:

1, goes up filling part water in the surface vessel in upper and lower two containers.

2, feed the interior fills with water of downcomer of container down.

3, open feeding and go up the upper hose water inlet switch in the surface vessel, can observe down the water spray phenomenon in the flask.

The characteristics and the advantage of the utility model have:

Simple in structure, cost of manufacture is low, and is easy to operate, energy free consumption, and the sight of water spray is strong, causes student's attention and interest easily.Description of drawings:

This figure is a water spray phenomenon demonstrator structure synoptic diagram in the negative pressure flask

Label declaration among the figure:

(1) flask (2) rubber shower nozzle (3) upper hose (4) rubber plug (5) plastics basin (6) water inlet switch (7) water (8) stay pipe (9) downcomer (10) bucket

Specific embodiments:

How further specify the utility model below in conjunction with accompanying drawing realizes:

1, get an experiment and use flask, the flask mouth is bottle closure of rubber beyond the Great Wall, on rubber plug, makes a call to two holes, plugs upper hose and downcomer in two holes respectively, and in the supreme surface vessel of upper hose, downcomer passes to down in the surface vessel.

2, rubber plug and flask tight-lipped the connecting airtight that conduit will be housed, touch.

3, the upper and lower arrangement of two containers makes two containers that obvious difference in height arranged.

4, go up water filling in the surface vessel, as the water source of water spray, the straight-through surface vessel down of downcomer, and in downcomer fills with water.

5, open the water inlet pipe switch, the rubber nozzle can be sprayed water in the flask.

Claims

1. water spray phenomenon demonstrator in the negative pressure flask is equipped with a nozzle in its flask, it is characterized in that the upper hose top is equipped with the rubber nozzle, and the identical small sircle hole of a plurality of diameters is arranged on the nozzle, can make the water of ejection form the fireworks display shape.