Bottle stopper of chemical reagent bottle

Abstract

The invention relates to the technical field of chemical reagent bottles, in particular to a bottle stopper for chemical reagent bottles, which is provided with a plastic cover, and the plastic cover is composed of a circular cover plate and a cover plate, and is characterized in that the plastic cover is under the circular cover plate The middle part is provided with an elastic rubber plug, and the middle part of the elastic rubber plug is provided with an expansion groove whose section width gradually becomes wider from bottom to top. At least three expansion thread strips are evenly distributed on the top, and expansion gaps are set between the expansion thread strips. The expansion screw is provided in the expansion thread strips to match the threads of the thread strips. The lower end of the expansion screw extends into the The expansion tank is connected with the expansion thread strip. The upper end of the expansion screw passes through the circular cover plate of the plastic cover and there is a rotating piece at the end. It has the advantages of simple structure, convenient use, strong sealing, easy to open and cover, etc. advantage.

Description

technical field [0001] The invention relates to the technical field of chemical reagent bottles, in particular to a bottle stopper for chemical reagent bottles with simple structure, convenient use, strong sealing performance and easy opening and closing. Background technique [0002] As we all know, at present, the packaging of chemical reagents is usually made of glass or plastic materials, which can be prepared into various types and specifications of packaging bottles according to the difference in product performance. The cap is made of push-type soft plastic, and it fits very tightly with the mouth of the bottle. When opening the reagent bottle, the outer cover is generally unscrewed by hand, and then inserted into the plastic inner cover by hand or a sharp object to pick the inner cover off. Because the bottle mouth is made of hard material, the user often needs to perform multiple prying movements around the bottle cap when opening the inner bottle cap, which is eas...

AI Technical Summary

Problems solved by technology

Because the bottle mouth is made of hard material, users often need to pry up the bottle cap several times when opening the inner bottle cap, which is easy to break the plastic inner cap and affect the repeated use of the inner cap

On the other hand, when opening the inner cover, if you use too much force, the liquid in the reagent bottle will splash out and cause pollution. Some reagents are toxic or corrosive, and the reagent itself cannot be polluted, so it is not suitable to open it directly with bare hands. Gloves can protect hands, but the operation is not flexible after wearing gloves, and it is more difficult to open

Some reagent bottles have tight inner caps, which are difficult to open by hand. Common tools such as pliers can be used to open the reagent bottles, but it may cause contamination to the reagents and damage to the inner cap, which is not conducive to the preservation of the reagents and affects future use.

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