Liquefied nitrogen tank

Abstract

The invention discloses a liquefied nitrogen tank, which comprises a tank body, a lifting barrel, a cryopreservation box and a lifting fork, wherein the lifting barrel is arranged in a hollow cavity formed in the tank body; the cryopreservation box is arranged in the lifting barrel; a box cover plate is fixedly arranged at the top of the cryopreservation box; a tank cover is fixedly arranged at the top of the tank body; the lifting fork comprises a fork handle and a fork head arranged at the lower part of the fork handle; the fork handle is perpendicular to the lifting fork; a layer number ruler is arranged on the fork handle; a handheld mark is formed on the handle of the lifting barrel and is corresponding to the layer number ruler; the fork head of the lifting fork is inserted into a clamping slot formed in the bottom of the cryopreservation box; a fork hook arranged at the tail end of the fork head can be used for hooking the cryopreservation box out from the lifting barrel. The direct contact between the lifting barrel and room temperature air is avoided; the consummation of liquefied nitrogen is reduced; the quality of a saved sample is improved. According to the liquefied nitrogen tank, the exposure of a non-usage sample in the air is avoided; the saving quality of the sample is guaranteed; the saving time of the sample is prolonged; the sample extraction difficulty is lowered; the whole process is convenient and fast; the consummation of the liquefied nitrogen is reduced and the resource is saved.

Description

technical field [0001] The invention belongs to a liquid nitrogen tank in the technical field of ultra-low temperature preservation, in particular to a liquid nitrogen tank for a laboratory, which belongs to the innovative technology of a liquid nitrogen tank. Background technique [0002] The disadvantages of existing liquid nitrogen tanks are that the lifting cylinder is heavy and bulky as a whole, which makes extraction difficult, and it takes a long time to extract the frozen samples in the lifting cylinder. Therefore can not be accomplished conveniently and quickly. [0003] In addition, in order to extract one or two cryopreservation tubes from the existing liquid nitrogen tank, the entire lifting cylinder has to be lifted out, which affects the storage of other samples. Prolonged exposure of samples to the air has a certain negative impact on their frozen quality. [0004] In addition, during the extraction process of the existing liquid nitrogen tank, the lifting c...

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Problems solved by technology

[0002] The disadvantage of the existing liquid nitrogen tank is that the lifting cylinder is heavy and bulky as a whole, which makes extraction difficult, and it takes a long time to extract the frozen samples in the lifting cylinder

Therefore, it cannot be convenient and fast

[0003] In addition, in order to extract one or two cryopreservation tubes from the existing liquid nitrogen tank, the entire lifting tube has to be lifted out, which affects the storage of other samples

Exposure of samples to air for a long time has a certain negative impact on their frozen quality

[0004] In addition, during the extraction process of the existing liquid nitrogen tank, the lifting cylinder wraps the liquid nitrogen and the tank mouth is exposed to the air for a long time, which accelerates the consumption of liquid nitrogen; Fast; during the storage process, because the lifting cylinder is hung on the wall of the liquid nitrogen tank, the handle of the lifting cylinder is in contact with the air, and the consumption of liquid nitrogen increases through heat conduction

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