Automatic molten iron liquid level detection device

The invention relates to the technical field of molten iron liquid level detection, especially to an automatic molten iron liquid level detection device comprising a motor, an insulating plate, a molten iron tank, a large screen, a PLC, fixed pulleys and a relay. A speed reducer is arranged on an output shaft of the motor through power output; a positive electrode and a negative electrode are symmetrically arranged on the insulating plate; a steel wire rope is arranged on the plurality of fixed pulleys in a matching manner; a rope wheel is arranged on power output of the speed reducer; and thespeed reducer is further provided with an encoder used in cooperation with the PLC. The encoder is electrically connected with the PLC, the PLC is further electrically connected with the large screen, the large screen is integrated with an audible and visual alarm, the relay is electrically connected with the PLC and the positive electrode and the negative electrode which are symmetrically arranged, and the positive elec