Floating ball type liquid level meter calibration device

The utility model discloses a floating ball type liquid level meter calibration device, which comprises a square box, a liquid inlet, a check valve, an electromagnetic valve, a filter, a liquid inlet pump, a liquid inlet pipeline and a control console, the liquid inlet pipeline is sequentially connected with the check valve, the electromagnetic valve, the filter and the liquid inlet pump from left to right. The check valve is fixed to the portion, between the liquid inlet and the electromagnetic valve, of the liquid inlet pipeline through a check valve connecting flange, the electromagnetic valve is fixed to the portion, between the electromagnetic valve and the filter, of the liquid inlet pipeline through an electromagnetic valve connecting flange, and a filter connecting flange is arranged on the portion, between the filter and the liquid inlet pump, of the liquid inlet pipeline. The liquid inlet pump is fixed on the liquid inlet pipeline through the liquid inlet pump connecting flange; according to the uti