Electric furnace tail gas emptying water seal capable of quickly adjusting liquid level

The electric furnace tail gas emptying water seal capable of rapidly adjusting the liquid level comprises a tank body, a water supplementing pipe and an overflow pipe, the water supplementing pipe and the overflow pipe are arranged on the tank body, the upper end of the tank body is open, an annular shell is arranged in the tank body, a gap is reserved between the lower end of the shell and the bottom of the tank body, and the outer wall of the shell is fixed to the upper end of the tank body through a cross beam. The upper end of the shell extends out of the tank body and then is provided with a top plate, the top plate is provided with a tail gas branch pipe and an exhaust pipe, the lower end of the tail gas branch pipe extends into the shell, the lower end of the exhaust pipe is flush with the top plate, the lower surface of the top plate is provided with a liquid level sensor, and an air bag is arranged on the lower portion in the shell and connected with the bottom of the tank body through a soft rope. A