Detection system for detecting temperature of liquid hydrogen

Abstract

The invention discloses a detection system for detecting the temperature of liquid hydrogen, which comprises a temperature detection device, the temperature detection device comprises a hydrogen conveying pipe and an outer layer pipe, the hydrogen conveying pipe is located in the outer layer pipe, a vacuum interlayer is arranged between the hydrogen conveying pipe and the outer layer pipe, an outer vertical pipe is arranged on the outer layer pipe, an inner vertical pipe is arranged on the hydrogen conveying pipe, the inner vertical pipe is arranged in the outer vertical pipe in a penetrating manner and extends out of the outer vertical pipe upwards, and a vacuum pump is arranged on the outer layer pipe; the top end opening of the outer vertical pipe is in sealed connection with the inner vertical pipe through an outer multi-layer sleeve, an outer installation pipe and an inner installation pipe are arranged in the inner vertical pipe in a penetrating mode, the upper end of the outer installation pipe upwards extends out of the inner vertical pipe, the top ends of the outer installation pipe and the inner vertical pipe are fixed through a flange, and the inner installation pipe is located below the outer installation pipe and communicated through the inner multi-layer sleeve. The lower end of the inner mounting pipe extends into the hydrogen conveying pipe, and a temperature sensor is fixed on a lower port of the inner mounting pipe; and a data transmission lead of the temperature sensor is connected with the temperature measurement transmitter. The detection system has high stability and repeatability, can accurately detect the liquid hydrogen temperature, and has extremely low heat leakage rate.

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