Sheet metal connection structure and liquid nitrogen container handle

Abstract

The invention relates to the field of sheet metal members and discloses a sheet metal connecting structure and a liquid nitrogen container pail. The sheet metal connecting structure comprises a first connecting part and a second connecting part. The first connecting part is provided with an inserting sheet. The second connecting part is provided with a buckling sheet. An inserting opening is formed between the buckling sheet and the second connecting sheet. The inserting sheet is inserted in the inserting opening. The buckling sheet and the connecting contact portion of the first connecting part are located in the same plane. The inserting sheet and the connecting contact portion of the second connecting sheet are located in the same plane. Compared with common assembly-type structures, the sheet metal connecting structure can be reduced by the thickness of at least one layer of sheet metal. By applying the sheet metal connecting structure to the liquid nitrogen container pail, the overall size can be reduced on the premise of guaranteeing that the size of biological sample boxes stored in the liquid nitrogen container pail is unchanged, so that the number of biological sample boxes capable of being stored in the liquid nitrogen container pail is increased. The sheet metal connecting structure not only can be applied to the liquid nitrogen container pail, but also can be widely applied to other sheet metal members with connecting portions needing to be thinned.

Description

technical field [0001] The invention relates to the field of sheet metal components, in particular to a sheet metal connection structure and a lifting cylinder for a liquid nitrogen container. Background technique [0002] Liquid nitrogen container is an important biological low-temperature storage container, which is widely used in biology, medicine, animal husbandry and other fields. Biological sample cartridges are usually stored in multi-layer lifters in liquid nitrogen containers. [0003] Such as figure 1 As shown, the traditional liquid nitrogen container lifting cylinder is usually welded by sheet metal components, and due to the limited internal space of the liquid nitrogen container, in order to improve the space utilization, the thickness of each component of the lifting cylinder is relatively thin, so the lifting cylinder is generally made of resistance welding. Welding, however, resistance welding not only has high equipment costs, but also lacks a reliable no...

AI Technical Summary

Problems solved by technology

After measurement, it was found that this type of assembled handle is 3~5mm wider than the welded handle, and it is this seemingly small gap that caused the above-mentioned consequences of the reduction of biological sample boxes.

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