College chemistry teaching test tube cleaning device based on opposite rotation principle

Abstract

A test tube cleaning device for university chemistry teaching based on the principle of counter-rotation, comprising an upper base plate and a lower base plate, the upper base plate and the lower base plate are connected by two reciprocating lifting devices; the upper base plate is embedded with several The first bearing, the inner ring of the first bearing is fixedly connected with a support sleeve, the top of the support sleeve is sealed, and a rubber pad is arranged on the inner side wall of the support sleeve; the upper part of the support sleeve is fixedly connected with the first driven Gears, the adjacent first driven gears mesh with each other, the first driven gear located on the far left meshes with the first driving gear, the first driving gear is arranged on the upper base plate through the first support shaft, and the first support shaft The top end is fixedly connected with the output shaft of the first motor; a plurality of second bearings are embedded on the lower bottom plate, and the inner ring of the second bearings is fixedly connected with a scrubbing body. The invention has the advantages of reasonable structural design, simple and convenient operation, good cleaning effect, etc., and has certain popularization and application value.

Description

technical field [0001] The invention relates to the technical field of chemical experiment teaching, in particular to a test tube cleaning device for university chemistry teaching based on the principle of counter-rotation. Background technique [0002] At present, chemistry is an experiment-based discipline, and the formation and development of chemistry cannot be separated from experiments. After studying in middle school, students have a basic understanding of the subject of chemistry. But for the chemistry study in the university, some students are still at a loss. When students are studying, they not only need to master the contents of the textbook, but also need to use chemical experiments to form chemical concepts, understand and consolidate chemical knowledge, so chemical experiments are particularly important. [0003] In the process of chemical experiments, test tubes are the most common experimental equipment. Test tubes, commonly used instruments in chemical la...

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Problems solved by technology

[0004] It is used in a large amount, and the test tubes used in the experiment are cleaned manually. Now the cleaning is basically done by brushing, rotating in the test tube or rinsing back and forth. It is not very convenient to clean. Moreover, it is easy to cause the test tube to rupture during cleaning, which may injure students or teachers.

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