Dynamic nitrogen charging system applicable to astronomical observation equipment under polar condition

The utility model discloses a dynamic nitrogen charging system applicable to astronomical observation equipment under a polar condition. A sealing cover is arranged on a telescope tube. The dynamic nitrogen charging system is characterized in that the sealing cover is connected with nitrogen bottles through a quick joint, a flexible pipe and an electromagnetic valve; and the electromagnetic valve is connected with a control system through a network. According to an optimum scheme, two or more nitrogen bottles are used for supplying nitrogen to the telescope tube simultaneously, are connected through the flexible pipe, are connected to the electromagnetic valve through a three-way joint, and are in a parallel state. The electromagnetic valve is switched on and switched off under the remote control of an iridium satellite. The dynamic nitrogen charging system can meet a requirement that a precise optical, mechanical and electrical system is used for a plurality of years in an unattended state under a severe pol