Teaching experiment used three-way pipe for preventing mixed flowing of liquid

Abstract

The invention discloses a teaching experiment used three-way pipe for preventing mixed flowing of liquid, which comprises an air extraction pipeline and a communicating vessel, wherein one end of the air extraction pipeline is communicated with the middle part of the communicating vessel; the communicating vessel comprises a first pipeline, a second pipeline and a third pipeline; the first pipeline, the second pipeline and the third pipeline are sequentially communicated; a groove is formed in the bottom of the second pipeline; the groove is of an oval or sawtooth shape. By the manner, liquid to be detected and water can be prevented from being mixed when gas is excessively extracted, so that the teaching efficiency is improved.

Description

technical field [0001] The invention relates to a three-channel pipe used in the teaching experiment of preventing liquid mixed flow. Background technique [0002] In chemistry teaching experiments, the "Haier method" is often used to measure the density of liquids. The specific operation is to insert two nozzles of the three pipes into the water and the liquid to be tested respectively, and the last nozzle is the suction pipe and The aspirating cylinder is connected, and the aspirating cylinder pumps air to form a liquid column in the pipe inserted into the water and the liquid to be tested. Use a scale to measure the height of the liquid column and the height of the water column of the liquid to be tested, and use the formula ρ 待测液体 *g*h 待测液体液柱高度 =ρ 水 *g*h 水柱高度 Calculate the density of the liquid to be measured. [0003] In specific experiments, many students often cause the liquid to be tested and water to mix and pour into the suction pipe of the three pipes due to u...

AI Technical Summary

Problems solved by technology

[0003] In specific experiments, many students often cause the liquid to be tested and water to mix and pour into the suction pipe of the three pipes due to unskilled pumping too much when using the pump. Since the liquid to be tested and water have been mixed, the original The density of the measured liquid and water has changed, and the follow-up test cannot continue, which seriously reduces the teaching efficiency

Therefore, the existing three tubes can no longer meet the experimental needs

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