Thermocouple appeared two kinds of causes of the leakage and five kinds of solve ways

Actually thermocouple is our common to the measuring instrument, and the application scope is very broad, mainly includes the metallurgy, petroleum, machinery and chemical industry, etc. Small make up to introduce thermocouple is the main reason for the leakage and the solution.

a, the reason of leakage: electric stove brick because in high temperature insulation fault, if equipped with wire furnace wall in plant with metal thermocouple, thermocouple is easier at this time of contact between the wire and the furnace, and refractory brick because at high temperatures or intentions become easier to remove the material, but because the temperature will continue to rise, so its insulation performance will gradually decline. After contact between furnace and thermocouple, because platinum-rhodium thermocouple protection tube is the use of alumina ceramic tube, I will directly use porcelain pipe insulation and separation, so in the case of high temperature, also can appear insulation performance degradation, serious word will appear the phenomenon of leakage, will direct leak onto the surface of the thermocouple, thermocouple at this time would signal that communication and leakage. Second, the settlement way: ensure no contact between the thermocouple and refractory brick; Thermocouple in the cathode can be directly grounded, the signal of thermocouple in leakage completely eliminate; Which is set in the output end of the thermocouple a filtering device; Directly from the thermocouple thermal contact the location of the ground to ground; On the pipeline of thermocouple with silicon carbide tubes and heat-resistant steel tube and so on, and directly to the ground.