Self-maintenance device of nitrogen making machine

The utility model discloses a self-maintenance device of nitrogen making machine, including bottom plate and nitrogen making machine body, the upper end of bottom plate is fixedly connected with the filter box, the nitrogen making machine body is fixedly connected to the upper end of bottom plate, the bottom in the filter tank is rotatingly connected with the threaded rod, the threaded rod is connected with the scraper blade through the sliding mechanism, and the scraper blade is connected with the sliding mechanism. The scraping plate is slidably connected to the outer wall of the filter screen, a limiting rod is fixedly connected to the inner bottom wall of the filter tank, and the limiting rod is connected with the scraping plate through a limiting mechanism. By arranging the motor, the threaded rod, the scraping plate and the like, the purpose that the threaded rod drives the scraping plate to slide on the outer wall of the filter screen in a reciprocating manner can be achieved by periodically starting t