Liquid nitrogen transfer device for laboratory

The utility model belongs to the technical field of liquid transfer, and particularly relates to a liquid nitrogen transfer device for a laboratory, which comprises a sealing plug used for sealing an opening of a liquid nitrogen tank; the air inlet pipe, the exhaust pipe and the liquid outlet pipe are respectively arranged in the sealing plug in a penetrating manner; a valve is arranged at the upper end of the exhaust pipe, the lower end of the exhaust pipe is suspended above liquid nitrogen in the liquid nitrogen tank, one end of the air inlet pipe is communicated with an air pump, the other end of the air inlet pipe penetrates through the sealing plug to be suspended above the liquid nitrogen in the liquid nitrogen tank, one end of the liquid outlet pipe is inserted into the liquid nitrogen in the liquid nitrogen tank, and the other end of the liquid outlet pipe is communicated with the air pump. And the other end of the liquid outlet pipe is communicated with the Dewar flask. Liquid nitrogen is transferred