Anti-refluxing sealing test tube cap

Abstract

The invention discloses an anti-refluxing sealing test tube cap. The anti-refluxing sealing test tube cap comprises a top cap and a cylindrical cap body, wherein the cap body is matched with a test tube opening in size and shape, a through hole is formed in the top cap, a micropore filtering membrane ring and a check valve ring are sequentially arranged at the lower end of the top cap, a downward duckbill valve hole is formed in the middle position of the check valve ring, the lower end of the duckbill valve hole is closed up towards the middle to form a flat opening, and vent holes are formed in the corresponding positions of the top cap and the check valve ring respectively. According to the test tube cap, due to the improved reasonable structure, and particularly due to a sealing structure formed by a duckbill mechanism and the micropore filtering membrane ring, the good sealing property is ensured, substances can be added into a test tube conveniently, and the air pressures inside and outside the test tube can be kept to be balanced, so that leakage or refluxing of substances or bacteria, caused by pressure difference, can be avoided, and the anti-refluxing sealing test tube cap has good using value in the aspect of biological security application.

Description

technical field [0001] The invention relates to the field of laboratory appliances, in particular to a test tube cover with anti-reflux effect. Background technique [0002] Test tubes are common utensils in laboratories, and are mainly used for glass containers containing solids, liquids and even bacteria. Therefore, the sealing of test tubes is a matter that must be paid attention to. Usually, the sealing of the test tube is mainly realized by the test tube cover. The test tube is tightly sealed by the safe and reliable test tube sealing cover, which can prevent the material from being polluted or harmful bacteria from leaking. But at this time, it is faced with the problem of how to add substances to the test tube. The usual way is to open the test tube cover to add substances to the test tube when needed. Once the test tube cover is opened, improper operation will cause the substance in the test tube to splash. In response to this problem, some designers try to solve it...

AI Technical Summary

Problems solved by technology

However, in actual use, it has been found that multiple injections of the added substance will cause a problem of air pressure difference inside and outside the test tube, which may cause the air pressure in the test tube to be greater than atmospheric pressure, causing the test tube cover to be ejected. In addition, the sealing performance of the rubber sleeve will also be reduced after repeated punctures. , the substance or bacteria in the test tube may still leak to the outside or flow back into the syringe

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