A new type of liquid nitrogen extraction and delivery device for testing

Abstract

The invention relates to a liquid nitrogen extraction and conveying device for experiments. The liquid nitrogen extraction and conveying device comprises a pore plate, a liquid storage device, a storage tank, a temperature adjusting device, a liquid outlet pipe, a liquid extraction pipe and a plug, wherein the liquid storage device accommodates liquid nitrogen; the plug seals the liquid nitrogen in the liquid storage device; one end of the liquid extraction pipe is inserted into the liquid nitrogen; the other end of the liquid extraction pipe penetrates through the plug to communicate with the liquid storage device; one end of the liquid outlet pipe communicates with the liquid extraction pipe; the other end of the liquid outlet pipe aligns to an external liquid collection container; the pore plate is arranged on the liquid outlet pipe and is used for controlling the output flow of liquid nitrogen; the temperature adjusting device controls the air pressure in the storage tank through adjusting the temperature, so that the flow velocity of the liquid nitrogen is controlled; and the liquid storage device is used for conveying buffer and blow removal of residual liquid after conveying. According to the conveying device, the liquid nitrogen can be extracted and conveyed stably, quickly, safely and accurately, the manpower is saved, the cost is reduced, and the device is applicable to most low-temperature experiment occasions like laboratories.

Description

technical field [0001] The invention relates to a simple device based on controllable electric heating and pipeline smooth conveying technology, in particular to a novel experimental liquid nitrogen extraction and conveying device, which is used for accurate and safe liquid nitrogen extraction in a laboratory. Background technique [0002] Liquid nitrogen is an important medium for laboratory manufacturing of low temperature environments. During the use of liquid nitrogen, two test personnel put on protective equipment and then lift the cryogenic storage tank to pour liquid nitrogen into the test piece container. During the operation, the splash of liquid nitrogen can easily cause injury to the test personnel. At the same time, it is difficult to accurately control the amount of liquid nitrogen dumped, resulting in a waste of test resources. [0003] At present, some units have also adopted some new methods for experimental liquid nitrogen extraction. However, the extracti...

AI Technical Summary

Problems solved by technology

However, the extraction device is too simple to control the flow rate of liquid nitrogen. When the flow rate is too high, the hydraulic impact of liquid nitrogen on the delivery pipeline is also large, and further improvement is needed in terms of safety and economy.

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