Anti-pollution rubber-head burette

Abstract

The invention belongs to the technical field of chemical apparatuses, and particularly relates to an anti-pollution rubber-head burette, mainly solving the problems of high operation requirement, pollution caused by easy backflow, and the like of an existing rubber-head burette. According to the technical scheme adopted by the invention, the anti-pollution rubber-head burette comprises a rubber-head burette body and is characterized in that a funnel-shaped glass tube is arranged at the top of the inner side of a glass tube of the rubber-head burette body, the top of the funnel-shaped glass tube is connected with the top of the glass tube in a sealing manner, the bottom of a lower tube of the funnel-shaped glass tube is of an open structure, the radius of the lower tube is less than the minimum radius of the rubber-head burette body, and the length of the funnel-shaped glass tube is less than 1/3 that of the rubber-head burette body. The anti-pollution rubber-head burette has the advantages of simple structure, and less possibility of backflow and pollution.

Description

technical field [0001] The invention belongs to the technical field of chemical instruments, and in particular relates to an anti-pollution plastic tip dropper. Background technique [0002] Chemistry experiment is a compulsory course for every middle school, high school, and even higher education professional students. As one of the first chemical instruments to come into contact with, the rubber dropper is frequently used in various experiments. Although the common rubber tip dropper is simple to make and easy to use, in the process of specific operation, due to the carelessness of the operator or other reasons, it is easy to flow back and pollute the rubber tip, resulting in the inability to continue to use the sucked liquid. Can't continue to use either. Contents of the invention [0003] The present invention mainly aims at the problems of high operation requirements and easy backflow pollution of the existing rubber dropper, and provides an anti-pollution rubber dr...

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problems of high operation requirements and easy backflow pollution of the existing rubber dropper, and provides an anti-pollution rubber dropper with simple structure, difficult backflow and pollution.

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