Experimental electric furnace is mainly used for high chromium, high manganese steel castings, ductile iron, 45 steel, stainless steel hardening, annealing, aging and heat treatment of the various mechanical parts. Experimental electric furnace safety device failure analysis: 
 High water, low water level alarm device. Chain protection of the high and low water level alarm and low water level in the drum water level is too high or too low beeps to remind fireman Note. Gas boiler water level sensor float type, due to long-term high-temperature boiler water or steam contact, the type of magnet and electrode three sensor electrode electrochemical corrosion, scaling and other reasons the conductive properties of the electrode Ministry can easily be destroyed; or between the electrode and the water meter cylindrical shell insulation aging makes the signal circuit short-circuit; or electrical lines due to high temperatures lead to the break or poor contact. These factors lead to a water level sensor failure or malfunction. 
 Furnace safety protection device. Combustion ignition process control and flame failure protection program depends on the electric eye CDS (flames monitor) by UV phototube and flame monitoring circuit boards, electronic components are often easy to aging failure and thus lose the role of monitoring the flame, but once they lost there is the risk of furnace explosion. 
 Experimental electric furnace boiler overpressure protection device. The controller of the overpressure protection boiler overpressure run, it is the use of bellows elastic element elongation or shortening the rise and fall of the pressure change characteristics of the lever and dial-arm toggle switch, contact switch opens or closes. so as to achieve control of the pressure. Bellows the elastic components, electrical contacts, springs and other components are easily damaged, if not timely, will not achieve the protective effect of overpressure. 
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