Nitrogen blowing instrument

The utility model belongs to the technical field of the chemistry apparatus, especially, relate to a nitrogen blowing instrument. Which comprises a housin, be equipped with the test -tube rack on the casing, the test -tube rack is connected with the air tube dish through the air tube frame, the lower part of connecting rod is connected with the test -tube rack through the shaft coupling, the upper portion of connecting rod is connected with the connecting rod through air tube frame axle sleeve, the other end of connecting rod is connected with the bracing piece through connection rod, the bracing piece rotates with the casing to be connected, the upper portion of bracing piece is equipped with ventilating connector, the lower part of bracing piece is equipped with down ventilating connector, a serial communication port, a plurality of air -blowing needles have been inserted on the air tube dish, the inserted part of air -blowing needle is the hose, a plurality of test tubes have been inserted on the test -tub