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(1)目的 检测热风炉的异常加热,并在发出警报的同时停止向其喷嘴供给燃料。 (2)机能 (a)用瞬动开关S_1接通电源,则氖灯L_1发光,再根据在热风炉送风之前设备的状况、台数及其它条件来打开调节阀门。 (b)压合起动按钮PB_1便开始运转。继电器x_1闭合,运转指示灯亮,同时,电磁阀sol打开,开始点火燃烧。一旦炉内温度达到200℃, (低温侧)电子温度调节器TH_2便动作,从而继电器x_3动作,但如电路图所示,继电器x_4不动作,因此电磁阀sol仍处于打开状态,蜂鸣器
(1) Purpose To detect abnormal heating of the stove and to stop supplying fuel to its nozzles at the same time when an alarm is issued. (2) Function (a) Turn on the power with the momentary switch S_1. The neon lamp L_1 emits light, and then it opens the regulating valve according to the condition of the equipment, the number of sets and other conditions before the blast furnace blows air. (b) Press the start button PB_1 to start operation. Relay x_1 closed, the operation indicator light, at the same time, the solenoid valve sol opened, began to burn. Once the temperature in the furnace reaches 200 ° C, the (low temperature side) electronic thermostat TH_2 operates and the relay x_3 operates. However, as shown in the circuit diagram, the relay x_4 does not operate and the solenoid sol is still turned on and the buzzer