Test tube placing device for chemical experiment teaching in senior high school

Abstract

The invention provides a test tube placement device for chemical experiment teaching in senior high schools, which comprises a base and a lifting mechanism, connecting columns are fixedly connected to four corners of the top of the base, a placement plate is slidably connected to one side of each connecting column, a placement hole is formed in the placement plate, and placement grooves are formed in two sides of the top of the base; the lifting mechanism comprises a threaded rod, a worm gear, a worm, a threaded sleeve and a connecting block, and the threaded rod is rotationally connected into the connecting column. A rotary knob is rotated to drive a worm to rotate, the worm drives a worm gear to rotate, the worm gear drives a threaded rod to rotate, the threaded rod drives a threaded sleeve to move, and the threaded sleeve drives a placement plate to move through a connecting block, so that the height of the placement plate is adjusted. Therefore, test tubes with different lengths are inconvenient to place, and the test tubes are easy to incline and fall off in the moving process.

Description

technical field [0001] The invention relates to the field of teaching instruments, in particular to a test tube placement device for high school chemistry experiment teaching. Background technique [0002] Chemistry, like physics, is a basic science of natural science. It is a science that studies the composition, properties, structure and changes of substances at the molecular and atomic levels. It is also a natural science based on experiments. , will need to use a lot of chemical experiment supplies, among which test tubes are the most common, with different specifications and functional requirements. [0003] In the teaching process, it is necessary to bring test tubes and other experimental supplies from the equipment room to the classroom for teaching. Since different test tubes are used for experiments during the experiment, it is necessary to carry test tubes of various specifications. At present, most test tube holders do not have The height is adjusted according t...

AI Technical Summary

Problems solved by technology

[0003] In the teaching process, it is necessary to bring test tubes and other experimental supplies from the equipment room to the classroom for teaching. Since different test tubes are used for experiments during the experiment, it is necessary to carry test tubes of various specifications. At present, most test tube holders do not have A device that adjusts the height according to the length of the test tube, which is not convenient for placing test tubes of different lengths, and the test tube is prone to tilt and fall during the moving process

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