Ground branched test tube and solid-liquid mixing experimental device for middle school experiments

Abstract

The invention relates to the technical field of experimental instruments, in particular to a ground branched test tube and a solid-liquid mixing device for middle school experiments. The invention aims to solve the problems of air leakage and experiment safety caused by time and labor waste in punching on a rubber plug and inserting of a glass conduit and poor sealing performance of a test tube and a double-hole plug in the existing experiment device. The ground branched test tube comprises a tube body and a long-neck ground air guide tube matched with a branch tube. A first branch pipe is arranged on the pipe body, and an outlet of the first branch pipe is of a necking structure. The longer end of the long-neck ground gas-guide tube extends into the bottom of the tube body; the inner wallof the pipe orifice of the pipe body is a first frosted surface, and the outer wall, matched with the pipe orifice, of the long-neck frosted gas-guide pipe is a second frosted surface, so that the sealing matching of the pipe body and the long-neck frosted gas-guide pipe can be realized through the matching of the first frosted surface and the second frosted surface. The branch test tube with theground opening does not need a rubber plug or a glass guide tube and is convenient to install. And the test tube can be used by slightly screwing the test tube through the matching of the frosted surface.

Description

technical field [0001] The invention relates to the technical field of experimental instruments, in particular to a test tube with a mouthpiece and a solid-liquid mixing experimental device for middle school experiments. Background technique [0002] Chemical experiments can stimulate students' interest in learning chemistry, improve students' ability to understand chemical concepts, learn and master chemical knowledge, and are of great help to cultivate students' observation and thinking abilities. The hardware conditions of laboratories in various schools vary greatly, the utilization rate of experimental instruments and equipment is poor, and the adaptability of some experimental instruments is poor; in chemical gas experiments in middle schools, ordinary test tubes and double-hole rubber stoppers are usually used for experiments. The installation process is laborious and the sealing is poor, resulting in air leakage and poor safety, especially for toxic gas experiments. ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the existing glass test tubes, it is usually necessary to punch a hole on the rubber stopper and insert the glass catheter, the installation process is laborious, and the sealing is poor, resulting in air leakage and poor safety. The invention provides a ground test tube and a solid-liquid mixing experimental device for middle school experiments. The ground test tube includes a tube body and a long-necked ground air tube matched with the ground test tube; There is a first branch pipe, and the outlet of the first branch pipe adopts a contraction port structure; the longer end of the long-necked ground-mouthed airway extends into the pipe body, and the shorter end is used to connect with the rubber hose; the nozzle of the pipe body The inner wall of the long-necked ground-mouthed airway is the first frosted surface, and the outer wall of the long-necked ground-mouthed airway tube is the second frosted surface. Through the cooperation of the first frosted surface and the second frosted surface, the connection between the tube body and the long-necked grounded-mouthed airway tube is realized. seal fit

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