An access device for a single sample box in a liquid nitrogen tank

Abstract

The invention belongs to the field of low temperature storage, and particularly relates to a storage and taking device of independent sample boxes in a liquid nitrogen container. The storage and taking device comprises a storage rack, the sample boxes and a material taking rod; a plurality of storage cases are arranged in the storage rack; a sample box inlet is formed in one end of each storage case; fixing rods for fixing the sample boxes are arranged at the other ends, corresponding to the sample box inlets, of the storage cases correspondingly; a normal close clamping device for clamping and connecting with one corresponding fixing rod is arranged at one end of each sample box; normal open clamping devices for clamping and connecting with the material taking rod are arranged at the other ends of the sample boxes; one normal close clamping device and / or one normal open clamping device of each sample box correspond or corresponds to one controller; and through the controllers, the normal close clamping devices and / or the normal open clamping devices corresponding to the controllers can be controlled to be switched between clamping and loosening states. The target sample box can be directly taken out through the material taking rod, and the risk that the activity of irrelevant samples in the same storage rack is reduced due to repeated storage and taking, and repeated freezing and thawing is avoided.

Description

technical field [0001] The utility model belongs to the field of low-temperature storage, in particular to an access device for a single sample box in a liquid nitrogen tank. Background technique [0002] Liquid nitrogen cryopreservation is currently the most important method for clinical and laboratory long-term storage of biological specimens, and is often used for long-term storage of bacteria, cells, and tissues. Resuscitating biological specimens when needed can obtain viable biological specimens. However, if the sample is often repeatedly frozen and thawed, the vitality of the biological specimen will be greatly reduced. The existing liquid nitrogen biological specimen access device generally includes a liquid nitrogen tank, a storage rack arranged in the liquid nitrogen tank, a removable sample box and a It consists of a fixed rod assembly that fixes the sample box. When taking a sample, it is necessary to take out the storage rack and all the sample boxes on the sto...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this utility model is to overcome the above deficiencies, solve the problem that all specimen samples must be taken out and sorted when storing biological specimens in the existing liquid nitrogen tank, resulting in repeated freezing and thawing of irrelevant specimens, and provide a convenient, safe and accurate removal target Storage device for biological specimens that does not affect other irrelevant specimens and does not increase their chances of getting out of liquid nitrogen

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