Modularized nitrogen making machine

The invention discloses a modularized nitrogen making machine and relates to the field of nitrogen making machines, the modularized nitrogen making machine comprises a molecular sieve fixing shell and a gas guide pipe, a lifting sleeve is slidably connected in the molecular sieve fixing shell, a bidirectional hydraulic cylinder is arranged on the outer side of the molecular sieve fixing shell, and joint arms are arranged at the output ends of the two sides of the bidirectional hydraulic cylinder. After critical data of an electronic pressure sliding rod are received, the bidirectional hydraulic cylinder is started, the joint arm is pushed to be away from a molecular sieve, at the moment, a connecting base and fixing teeth leave the molecular sieve, the molecular sieve and the lifting sleeve descend under the action of gravity, and a new molecular sieve falls to a station under the cooperation of a limiting protrusion and a limiting table; at the moment, the connecting base and the fixing teeth are reset under