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Multifunctional atmospheric pressure demonstrating experimental device for teaching

An experimental device and atmospheric pressure technology, applied in the direction of educational appliances, teaching models, instruments, etc., can solve the problems of increasing the volume of the device, single form, power supply heating, etc., and achieve the effect of improving the quality of teaching, facilitating popularization and application, and quickly generating steam

Inactive Publication Date: 2019-02-22
阆中市河溪镇小学校食品综合服务部
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following problems in this atmospheric pressure demonstration experimental device: the volume of the device is increased, it is inconvenient to move, and water vapor is not easy to enter in the atmospheric pressure demonstration device; The transport efficiency of water vapor is improved, so that the water vapor content inside the atmospheric pressure demonstration device is low, so that the final change of the balloon is not very obvious, so that the students cannot observe the obvious demonstration effect
This kind of atmospheric pressure demonstration experimental device has the following problems: it can only demonstrate the change of atmospheric pressure in the form of steam and balloons, and the form is single; it needs power supply heating, and it cannot be used when there is no power supply, so its application is limited; there is no scale mark, and it cannot be more vivid. , more accurately understand the process of air pressure changes

Method used

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  • Multifunctional atmospheric pressure demonstrating experimental device for teaching
  • Multifunctional atmospheric pressure demonstrating experimental device for teaching
  • Multifunctional atmospheric pressure demonstrating experimental device for teaching

Examples

Experimental program
Comparison scheme
Effect test

experiment Embodiment 1

[0023] like figure 2 As shown, take off the first sealing plug 22, install the second sealing plug 24, open the switch valve 15, take off the third sealing plug 18 or the fifth sealing plug 9, and pass the first "U" shaped transparent tube 23 of the first One open end adds liquid 25 (generally tap water, also can be oily liquid) in the first " U " shape transparent tube 23 and makes the depth of liquid 25 in the two vertical tubes of the first " U " shape transparent tube 23 Close to the middle, now because the pressure of the liquid 25 in the two vertical pipes is an atmospheric pressure (that is, all communicated with the outside air), so the depth of the liquid 25 in the two vertical pipes is the same; then the third sealing plug is installed 18 and the fifth sealing plug 9, through the second transparent piston tube 7 pumping, the pressure that the liquid 25 in the vertical tube near its second end of the first "U" shape transparent tube 23 will reduce at this moment, bec...

experiment Embodiment 2

[0028] like image 3 As shown, take off the first sealing plug 22, the second sealing plug 24 and the third sealing plug 18, close the switch valve 15, now the fifth sealing plug 9 has nothing to do with this experiment; The lower port is close to a thin sheet 26 with a smooth surface (the thin sheet 26 can be a plastic bottle or a glass sheet, etc., the surface is smooth and thinner) and pressed by hand, the first "U" shape transparent tube 23 passes through the first Open end adds liquid 25 in the first " U " shape transparent tube 23 and makes the depth of liquid 25 in the two vertical tubes of the first " U " shape transparent tube 23 close to the middle part, this moment because of the two vertical tubes in the two vertical tubes The pressure that the liquid 25 is subjected to is an atmospheric pressure (that is, all communicated with the outside air), so the depth of the liquid 25 in the two vertical pipes is the same; then the first sealing plug 22 and the third sealing...

experiment Embodiment 3

[0030] like Figure 4 As shown, take off the fifth sealing plug 9, install the fourth sealing plug 11, and close the switch valve 15. At this time, the first sealing plug 22, the second sealing plug 24 and the third sealing plug 18 have nothing to do with this experiment; Two transparent piston tubes 7 pump air, and now the gas pressure outside the balloon 14 decreases, and the gas pressure in the balloon 14 is the same as the outside air, which is an atmospheric pressure, so the balloon 14 will gradually become larger, thereby changing with pumping+balloon The form demonstrates the fact that atmospheric pressure exists.

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Abstract

The invention discloses a multifunctional atmospheric pressure demonstrating experimental device for teaching. The device comprises a bracing frame, a first U-shaped transparent tube, a second U-shaped transparent tube, an inverted U-shaped transparent tube, a transparent box, a first transparent piston tube, a second transparent piston tube, a rod-shaped electric heater, a switch valve, an air tube, a balloon, and first to fifth sealing plugs. The parts together form the experimental device which can make atmospheric pressure demonstration experiment by reducing the pressure by exhausting, reducing or increasing the pressure by steam and realizing change of the height of a liquid Coolum or size of the balloon. Via the device, the demonstrative experiment in which existence of the air pressure can be proved by observing the phenomenon that the water level is different when the water column in one end is equivalent to the air pressure and the other end is lower than the air pressure inthe U-shaped transparent tube can be realized, the whole balloon contraction and expansion process can be demonstrated by steam generation and condensation, and thus, the atmospheric pressure demonstration experiments are realized in different manners, and the device is convenient to popularize and apply.

Description

technical field [0001] The invention relates to an atmospheric pressure demonstration experimental device for middle school physics teaching, in particular to a multifunctional atmospheric pressure demonstration experimental device for teaching which can demonstrate various atmospheric pressure phenomena in various forms. Background technique [0002] In the process of physics teaching, the teaching of most knowledge only stays in the introduction of concepts. For example, the concept of atmospheric pressure is difficult for students to understand. If the image of atmospheric pressure can be shown to students through demonstration teaching aids, it will be easier It is easy for students to understand, and the memory will be relatively deep, so the atmospheric pressure demonstration experimental device is needed to demonstrate atmospheric phenomena, so as to deepen students' memory. [0003] Traditional atmospheric pressure demonstration devices generally have steam and ballo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/12
CPCG09B23/12
Inventor 张正祥赵映静
Owner 阆中市河溪镇小学校食品综合服务部