A cap for sealing the mouth of a glass volumetric flask

Abstract

The invention provides a cap for sealing the mouth of a glass volumetric flask, which comprises a cover top (1), a cover wall (2) and a buckle (3) integrally connected, the cover wall (2) and the cover top (1 ) is vertically connected in a circular tube shape, and the buckle (3) is an angular protrusion provided on the bottom edge of the inner wall (21) of the cover wall (2), and is connected to the cover wall (2) on the cover top (1) Grooves (4) are also provided at the joints of the outer walls (22). The invention can overcome various deficiencies of the bottle caps of the existing glass volumetric flasks, is simple and practical, has good sealing performance, and can be used universally for the same type of glass volumetric flasks.

Description

technical field [0001] The invention relates to a bottle cap, in particular to a cap that can be used for sealing the mouth of a glass volumetric bottle. Background technique [0002] Glass volumetric flask is a kind of glass container commonly used in chemical analysis process, and it is mostly used for constant volume of liquid. [0003] The volumetric flask needs to be sealed when it is used, and its sealing depends on the ground glass stopper. It is also necessary to apply vaseline on the ground mouth, which is easy to contaminate the solution in the bottle and the volumetric flask. Leakage. [0004] Most of the volumetric flasks produced by domestic manufacturers have the same outer diameter and different inner diameters of the volumetric flasks in different batches of the same model, so the corks are of different sizes and cannot be used universally. It is very inconvenient to use and clean. The common practice in the laboratory is to tie the purchased volumetric fla...

AI Technical Summary

Problems solved by technology

[0003] The volumetric flask needs to be sealed when it is used, and its sealing depends on the ground glass stopper. It is also necessary to apply vaseline on the ground mouth, which is easy to contaminate the solution in the bottle and the volumetric flask. Leakage

[0004] Most of the volumetric flasks produced by domestic manufacturers have the same outer diameter and different inner diameters of the volumetric flasks in different batches of the same model, so the corks are of different sizes and cannot be used universally. It is very inconvenient to use and clean. The common practice in the laboratory is to tie the purchased volumetric flask body and cork together with a rope to avoid confusion, but the volumetric flask is often damaged during cleaning.

[0005] In addition, the glass volumetric cork is mostly cylindrical with a thick top and a thin bottom. The top is usually connected with a round pie-shaped glass piece perpendicular to the top plane for easy access, which makes it very inconvenient to remove and place the cork. It is easy to pollute the cork, and it is easy to roll off and break

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