The invention relates to the technical field of detection, in particular to an inner wall state detection device for a
liquid hydrogen transportation tank, which comprises a miniature
liquid hydrogen transportation outer tank, a miniature
liquid hydrogen transportation inner tank is welded and fixed at the upper end of the inner wall of the miniature liquid
hydrogen transportation outer tank, and the upper end of the miniature liquid
hydrogen transportation inner tank penetrates through the top of the miniature liquid
hydrogen transportation outer tank and is in threaded connection with a screw cover; according to the device, by means of the characteristic that
liquid argon can be gasified when making contact with normal-temperature air, when the micro liquid hydrogen transportation outer tank is broken, the trigger mechanism is started, and the micro liquid hydrogen transportation inner tank is in a
vacuum state; the
liquid argon is gasified and mixed with the fluorescent
dry powder, the
colored gas generated by gasification is sprayed out from the damaged position to form a striking visual mark, a worker can visually find the damaged position at the first time without the aid of a complex detection instrument or large-area
troubleshooting, and the fault diagnosis time is greatly shortened.