Bottle stopper of chemical reagent bottle

Abstract

The invention relates to the technical field of chemical reagent bottles, and specifically relates to a bottle stopper of a chemical reagent bottle. The bottle stopper is provided with a plastic cover. The plastic cover is formed by a round cover plate and a sleeve plate. The bottle stopper is characterized in that an elastic rubber plug is arranged on the middle part of the lower part of the round cover plate, the middle part of the elastic rubber plug is provided with an expansion groove whose cross-section width gradually widens from bottom up. The round cover plate is provided with a screwhole communicated with a notch of the expansion groove. A groove wall of the expansion groove is uniformly distributed with at least three expansion thread battens. Expansion gaps are arranged between the expansion thread battens. The expansion thread batten is internally provided with an expansion screw rod cooperated with threads of the thread batten. The lower end of the expansion screw rod extends into the expansion groove and is connected with the expansion thread batten in a cooperated manner. The upper end of the expansion screw rod passes out of the round cover plate of the plastic cover, and an end is provided with a rotation sheet. The bottle stopper is advantaged by simple structure, convenient use, good sealing property, and easy opening and covering.

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.

Images