HYDROGEN STORAGE TANK AND REPLACEMENT METHOD FOR ON-OFF VALVE

摘要

A hydrogen storage tank (11) and a replacement method for an on-off valve, in which hydrogen occluding alloy (MH) received in a tank body (12) is prevented from being oxidized in the replacement of an on-off valve (30) connected to a hydrogen supply/discharge pipe (28) extending from the tank body (12). The hydrogen storage tank (11) has the tank body (12) in which the hydrogen occluding alloy (MH) is being received, the hydrogen supply/discharge pipe (28) to which the on-off valve (30) is connected, the on-off valve (30) being used to supply hydrogen gas to the tank body (12) and discharge hydrogen gas from the tank body (12), and a gas supply pipe (24) used to supply inert gas to the tank body (12) and provided independently of the hydrogen supply/discharge pipe (28). The method of replacing the on-off valve (30) connected to the hydrogen supply/discharge pipe (28) is such that inert gas is supplied from the gas supply pipe (24) to the tank body (12) and the on-off valve (30) is replaced in a state where the inert gas can be discharged from the supply/discharge pipe (28).