Safe transferring barrel of liquid nitrogen

Abstract

A safe transferring barrel of liquid nitrogen comprises a barrel body of which the bottom part is equipped with a flow guide pipe, wherein a tapered plug is arranged at a part where the flow guide pipe is connected with the barrel body; the top part of the tapered plug is connected to a pulling ring through a vertical rod; the pulling ring is positioned above the barrel body. According to the safe transferring barrel of the liquid nitrogen, the flow guide pipe is arranged at the bottom part of the barrel body, so that the liquid nitrogen can be conveniently taken from a narrow inlet of a liquid nitrogen container; the safe transferring barrel of the liquid nitrogen is reasonable in structure design, simple to operate, safe and convenient.

Description

technical field [0001] The invention relates to an experimental device, in particular to a liquid nitrogen safety pipetting barrel suitable for use in a laboratory when taking a small amount of liquid nitrogen. Background technique [0002] At present, in laboratories such as molecular biochemistry, a small amount of liquid nitrogen is often used in experiments such as RNA and DNA extraction to keep ultra-low temperature in the quick freezing box. In general, the amount of liquid nitrogen used is small, usually in the range of tens of milliliters to hundreds of milliliters. And adopt two kinds of ways to solve in the laboratory at present: a kind of way is the mode of direct dumping and another kind of way is to pour with common pail. [0003] For the first dumping method, the liquid nitrogen tank is generally relatively heavy, and the storage tanks used in ordinary laboratories are all more than 30 liters. During the operation, a person with great strength is required to ...

AI Technical Summary

Problems solved by technology

When operating, it requires a lot of strength to complete, and the amount of poured liquid is difficult to control, and it is easy to overflow or splash, which is not only easy to cause a lot of waste, but also easy to cause injury to the operator

[0004] For the second method of extracting a small amount of liquid nitrogen with an ordinary bucket, when taking liquid nitrogen, the liquid nitrogen is poured into the bucket through the overflow of the bucket and then extracted. This operation process will cause liquid nitrogen The liquid nitrogen level of the tank has to go through a process of rising and falling

When the liquid nitrogen in the tank is relatively full, the liquid nitrogen level rises when filling the liquid nitrogen into the bucket and pressing the bucket, which will easily cause the danger of liquid nitrogen overflowing out of the tank

In the same way, the amount of liquid nitrogen taken is not easy to control

Moreover, when pouring out, it is necessary to drag a long pole to tilt, which is extremely inconvenient in the pouring operation

The amount of pouring is not easy to control, and it is easy to spill, causing danger

In short, these two methods are very inconvenient to use and are likely to cause danger.

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