CN201594340U

CN201594340U - Energy-change presenter in physical and chemical changes

Info

Publication number: CN201594340U
Application number: CN2009201498729U
Authority: CN
Inventors: 蓝伟文
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-20
Filing date: 2009-04-20
Publication date: 2010-09-29
Anticipated expiration: 2019-04-20

Abstract

The utility model relates to a middle school teaching instrument, in particular to an energy-change presenter in physical and chemical changes. The energy-change presenter comprises a flat plate and instrument components, such as a beaker, a boiling flask, a bottle plug, a Y-pipe, a switch, a latex pipe, a glass pipe, a ball pipe and the like. The utility model is characterized in that the beaker, the boiling flask, the bottle plug, the Y-pipe, the switch, the latex pipe, the glass pipe, the ball pipe and the like are formed into a relative sealing space under the function of liquid in a U-shaped glass pipe. Energy changes generated by physical and chemical reaction in the beaker can affect gas in the boiling flask in the beaker to expend or contract, and further to make liquid posts in the glass pipe to move.

Description

Energy variation demonstration device in a kind of physics, the chemical change

One, technical field

The utility model relates to a kind of middle school teaching instrument, the energy variation demonstration device in particularly a kind of physics, the chemical change.

Two, background technology

In the middle school, energy variation during reflection physics, chemical reaction change, usually show with thermometer, such as, ninth grade " chemistry (descending) " (the Shanghai education publishing house etc. that middle school chemistry country curricular standard development group is write, 2008:155,193), " chemistry 2 (required) " of the total editorial committee of national basis educational class standard test teaching material of Beijing Normal University group volume [Shandong science and technology publishing house, 2007 (third editions): 36].And the Digital Labs of units such as GQY group development then is with temperature sensor and corresponding software and hardware thereof, and the temperature variation during physics, chemical reaction are changed is presented on the screen apace.

Above-mentioned both can both show physics, the chemical reaction energy variation in changing well, but the one side of its deficiency is all arranged.Show energy variation with thermometer, observe nearby not bad, but on the classroom if, be observation of students as teacher's demonstration, then the student who arranges behind the classroom just seems difficult.And temperature sensor and corresponding software and hardware thereof are difficult to push open because of its current costing an arm and a leg again.

Three, summary of the invention

The purpose of this utility model provides the energy variation demonstration device in a kind of physics, the chemical change, it have simple in structure, make easily, be convenient to long sight and can projection etc. characteristics, can demonstrate the energy variation in physics, the chemical change effectively.

For achieving the above object, the utility model is achieved in that

It comprises that instrument element such as flat board and beaker, flask, bottle stopper, Y-pipe, switch, emulsion tube, glass tube, bulb tube form, it is characterized in that described flask, bottle stopper, Y-pipe, switch, emulsion tube, glass tube, bulb tube etc., under the liquid effects in the U-shaped glass tube, the space of having formed a relative closure, the energy variation that physics, chemical reaction produced that takes place in the beaker, can influence the gas in the flask or expansion or contraction in the beaker, and then cause moving of fluid column in the U-shaped glass tube.The glass tube of carrying liquid is made into U-shaped, and wherein liquid rises or is declined to become opposite moving, and this has double effect, and the one, can change little variation by temperature sensor, the 2nd, strengthen the difference of fluid column, be beneficial to remote observation.The top respectively is connected with 1 bulb tube about the U-shaped glass tube, can move between these two bulb tubes by confined liquid, guarantees experiment safety.

Four, description of drawings

Concrete structure of the present utility model is provided by the following drawings.

Fig. 1 is according to a kind of physics that the utility model proposes, the energy variation demonstration device structural representation in the chemical change.The corresponding relation of number in the figure and article is:

1. dull and stereotyped 2. beakers, 3. flasks, 4. bottle stoppers, 5. Y-pipes

6. switch 7. emulsion tubes 8. glass tubes 9. bulb tubes

Five, embodiment

Below in conjunction with accompanying drawing the utility model is done further narration:

As shown in Figure 1.Get one flat plate, clip a fritter (left side is stayed and done the limit in right amount, to support) in its lower left corner, that clips widely is 2.5 times of the beaker diameter, high for the beaker height about 2.5 times.

Vertical bonding wide about 10 a centimetres flat board below flat board, it is long identical with the base of this demonstration device.Each one of the sticking triangular plate in its both sides again, thus make this demonstration device can be stably upright.

The sticking Y-pipe of dull and stereotyped upper left side central authorities, directly over a sticking horizontal glass tube, sticking side by side two bulb tubes in upper right side, sticking two the L shaped glass tubes in right side, connect with emulsion tube again, make it into the U-shaped structure.

Link to each other with emulsion tube with Y-pipe on the plug, fill in flask down.

Flask is positioned in the beaker.

When physics, chemical change take place in the beaker, if energy variation is arranged, flask wherein will produce induction---gas or expansion or contraction, and then influence moving up and down of fluid column in the U-shaped glass tube.

Analyze the phenomenon that moves up and down of fluid column in the U-shaped glass tube, know gas or expansion or contraction in the flask by inference, and then judge when in the beaker physics, chemical change taking place that energy variation is arranged.

Claims

1. physics, energy variation demonstration device in the chemical change, it comprises flat board and beaker, flask, bottle stopper, Y-pipe, switch, emulsion tube, glass tube, the bulb tube instrument element is formed, it is characterized in that described flask, bottle stopper, Y-pipe, switch, emulsion tube, glass tube, bulb tube, under the liquid effects in the U-shaped glass tube, the space of having formed a relative closure, the physics that takes place in the beaker, the energy variation that chemical reaction produced, can influence the gas in the flask or expansion or contraction in the beaker, and then cause moving of fluid column in the U-shaped glass tube.

2. by the energy variation demonstration device in the described a kind of physics of claim 1, the chemical change, it is characterized in that beaker, flask, bottle stopper, Y-pipe, switch, emulsion tube, glass tube, bulb tube instrument element, they are base with the flat board, roughly become planar structure.

3. by the energy variation demonstration device in the described a kind of physics of claim 1, the chemical change, it is characterized in that beaker, flask, bottle stopper, Y-pipe, switch, emulsion tube, glass tube are 1 to 2 group.

4. by the energy variation demonstration device in the described a kind of physics of claim 1, the chemical change, it is characterized in that flask can replace with conical flask.

5. by the energy variation demonstration device in the described a kind of physics of claim 1, the chemical change, the glass tube that it is characterized in that carrying liquid is made into U-shaped, and top respectively is connected with 1 bulb tube about it, wherein, a bulb tube links to each other with flask, and another bulb tube becomes open state.