Liquid hydrogen sampling mechanism on discharge pipe of liquid hydrogen storage tank

Abstract

The invention discloses a liquid hydrogen sampling mechanism on a discharge pipe of a liquid hydrogen storage tank. The liquid hydrogen sampling mechanism is characterized in that a sampling opening is formed in an inner pipe of the discharge pipe; an inner pipe connecting seat is arranged on the outer wall of the inner pipe at the sampling opening; a connecting through hole is formed in an outerpipe of the discharge pipe; an insulating cylinder is arranged on the outer pipe; an insulating chamber is formed in the insulating cylinder; a heating sleeve is connected outside the insulating cylinder; an insulating seat extends into the heating sleeve from the insulating chamber; a mounting through hole is formed in the insulating seat; the insulating seat is connected with a sampling pipe; apipe orifice of the sampling pipe is hermetically separated from the mounting through hole; the sampling pipe extends out of the heating sleeve; a medium input pipe and a medium output pipe are arranged on the heating sleeve; a capillary pipe is arranged between the sampling opening and the mounting through hole; and two ends of the capillary pipe respectively extend into the discharge pipe and the sampling pipe. The liquid hydrogen sampling mechanism disclosed by the invention has the advantages that detection is carried out without having to go far, the detection period is greatly shortened,and the influence of external heat on liquid hydrogen in the liquid hydrogen storage tank body in the sampling process can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of liquid hydrogen storage tanks, in particular to a liquid hydrogen sampling mechanism on a liquid hydrogen storage tank. Background technique [0002] Liquid hydrogen has the characteristics of high density, high safety performance and low pressure. At present, although the overall demand for hydrogen in China is relatively small, the demand for ultra-pure hydrogen is in short supply. The country has entered the explosive period of hydrogen energy use and the rapid growth period of hydrogen-related equipment. The rapid growth of hydrogen energy vehicles, hydrogen refueling stations and electronic semiconductor industries has further led to the expansion of the demand gap for ultra-pure hydrogen. [0003] In order to ensure the supply of ultra-pure hydrogen that meets the purity requirements, the ultra-pure hydrogen in the liquid hydrogen storage tank needs to be sampled and tested. Convenient, safe and ...

AI Technical Summary

Problems solved by technology

This sampling and testing method requires a long testing period, and the amount of liquid hydrogen extracted is relatively large, and the samples are easily polluted during transportation and storage.

In addition, the discharge pipe collects liquid hydrogen, and it is easy to bring external heat into the liquid hydrogen storage tank, thereby affecting the storage of liquid hydrogen

Traditional detection methods can no longer meet the growing demand for ultra-pure hydrogen

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