Device for multi-tank nitrogen sealing

The utility model discloses a device for nitrogen sealing of multiple groove bodies, which comprises a ball body, a ball core is arranged in the ball body, a nitrogen inlet pipe orifice and a plurality of nitrogen pipe orifices are arranged on the ball body, the nitrogen pipe orifices are connected with a nitrogen outlet pipeline, the nitrogen inlet pipe orifice is communicated with a nitrogen inlet pipeline, and a ball core outlet and a ball core inlet are arranged on the ball core. And the ball core is connected with the rotating device through a ball core transmission rod. The nitrogen sealing device is small in size and extremely low in manufacturing cost, the ball core of the ball body can be enlarged or reduced, the number of nitrogen outlet pipelines can be enlarged or reduced, nitrogen sealing can be carried out on different numbers of groove bodies, the flow of straight-through nitrogen of a single groove body can be displayed, and whether nitrogen sealing of the groove bodies fails or not can be jud