Air pre-cooling mechanism of air separation device

The utility model belongs to the technical field of air separation devices, and provides an air pre-cooling mechanism of an air separation device, which comprises an air pre-cooling box, an air separation rectifying tower, an air compression cooling pipe, an upper tower and a lower tower, the other end of the air precooling box is communicated with a communicating pipe, the end part of the communicating pipe is communicated with a vertical air compression cooling pipe, the bottom end of the air compression cooling pipe is communicated with a transverse constant-temperature pipe, and the end part of the constant-temperature pipe is communicated to the upper part of the side wall of the air separation rectifying tower. Then the air is transferred into an air compression cooling pipe, compressed and cooled through a pressure plate which circularly ascends and descends for secondary pre-cooling treatment, high-strength cooling of the air is kept, then the air is conveyed into an air separation rectifying tower th