A liquid nitrogen delivery device and its operating method

Abstract

The invention provides a liquid nitrogen conveying device, which is used for exporting liquid nitrogen in a liquid nitrogen container, and comprises a liquid nitrogen pump, an air source and a controller, wherein the air source is used for providing compressed air for the liquid nitrogen pump so as to drive the liquid nitrogen pump to work, and the controller is used for controlling the duration time and the interval time of the compressed air entering and exiting from the liquid nitrogen pump. The liquid nitrogen conveying device provided by the invention has the beneficial effects that the liquid nitrogen pump realizes parameter input through the controller and then is subjected to process control, and the air source provides compressed air drive, so that the liquid nitrogen pump can automatically operate in a timed and quantitative manner, manual full participation is unnecessary, the intelligence degree is higher, the labor is saved, the cost is reduced, and the conveying efficiency of the liquid nitrogen is obviously improved. The invention also provides an operating method of the liquid nitrogen conveying device.

Description

Technical field [0001] The invention relates to the technical field of liquid nitrogen transportation, more specifically, to a liquid nitrogen transportation device, and the invention also relates to an operation method of the liquid nitrogen transportation device. Background technique [0002] As a refrigerant, liquid nitrogen is widely used in many fields such as medical treatment, material heat treatment, and superconducting equipment. [0003] In the prior art, the method of transporting liquid nitrogen from the inside of the liquid nitrogen container to the outside generally adopts a hand-pinch liquid nitrogen pump or a foot-operated liquid nitrogen pump connected to the liquid nitrogen container. The specific working process is: manual pinching Rubber ball or step on the cylinder, so that the liquid nitrogen pump (general self-pressurizing liquid nitrogen pump) connected with the rubber ball or cylinder sucks a small amount of liquid nitrogen in the liquid nitrogen container ...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned methods of transporting liquid nitrogen all use manual manual operation to realize the transport of liquid nitrogen. The whole process always needs to be manually provided with original power, and manual participation is involved in the whole process. The degree of intelligence is low, which not only wastes human resources, but also liquid nitrogen The transmission efficiency is also relatively low

[0005] In addition, in the above working mode, both the rubber ball and the vaporization channel formed by the cylinder and the vaporization chamber are sealed from the outside atmosphere. When the delivery of liquid nitrogen needs to be stopped for a short time, the liquid nitrogen pump stops working. A certain amount of liquid nitrogen will be accumulated, and the liquid nitrogen in the clean room will be in contact with the steel ball used to block the vaporization channel in the liquid nitrogen pump. Due to the low temperature of liquid nitrogen, this often leads to the liquid nitrogen being decomposed. The steel ball is frozen, so that the steel ball cannot move, and then the vaporization channel is blocked, so that the hydraulic pump cannot work normally

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