Movable lower guide rod device for double-support frame type plate type heat exchanger

The utility model relates to a movable lower guide rod device for a double-support frame type plate type heat exchanger, which comprises a lower guide rod with external threads at two ends. The lower guide rod is mounted on a fixed pressing plate and an upright column of the heat exchanger. The movable lower guide rod device is characterized in that a gap is reversed between the lower guide rod and a mounting hole of the fixed pressing plate and the upright column; two backing plates are respectively mounted at two ends of the lower guide rod; a push-and-pull bolt is arranged at the upper end of each backing plate; and a fixed plate is mounted at the upper end of the push-and-pull bolt and also mounted on the fixed pressing plate and the upright column of the heat exchanger. By adopting the structure, the lower guide rod has two limiting positions; the lower guide rod is lower than the lower part of a heat exchange plate in the lower disassembly position, so that the mounting space is saved. Therefore, the ut