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红外线自动控制在目前是一种值得推广的测量、控制气体渗碳炉炉气的方法。应用这种控制碳势的方法的一个关键问题是样气的采取和冷却。我们在RJJ-75-9TG气体渗碳炉上安装、使用KH-02型红外仪时对这个问题采取下列一些措施,经过实践证明这些措施是可行的。如图所示,因为RJJ-75-9TG气体渗碳炉装有循环风扇(7),所以炉气从上经过炉壁到炉底,而后从炉中向上循环流动。为此,我们将取样管(6)弯向风扇,这样采取的样气是刚离开工件的,能更有效地反应出炉内气氛的工作情况,且又能利用风扇的压力缩短样气在取样管道中停滞时间,以减少样气中各组分之间发生反应。为了缩短取样管道,冷却器就直接安装在炉盖上。采用以下简便方法排除冷凝水:样气通过不锈钢取
Infrared automatic control is currently worth a promotion of measurement, gas carburizing furnace gas control method. A key issue in applying this method of controlling carbon potential is the introduction and cooling of sample gases. We installed the RJJ-75-9TG gas carburizing furnace. When using the KH-02 type infrared instrument, we took the following measures on this issue and proved that these measures are feasible. As shown, since the RJJ-75-9TG gas carburizing furnace is equipped with a circulation fan (7), the furnace gas passes from the upper wall to the bottom of the furnace and then circulates upwardly from the furnace. To this end, we bend the sample tube (6) to the fan so that the sample is just leaving the workpiece and more effectively reflects the atmosphere inside the furnace and can use the fan pressure to shorten the sample gas in the sample pipe In the stagnant time to reduce the reaction between the components of the sample. In order to shorten the sampling pipe, the cooler is mounted directly on the lid. Use the following simple method to exclude condensation: sample gas taken through stainless steel