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我厂水泥制品普遍采用坑式蒸汽养护,从八二年十一月开始,我们使用了ZWK—B型数字式蒸养温度自动程序控制仪,并在坑内实现了热介质定向循环,大大提高了燕养控制的自动化程度。一、ZWK—B型蒸养数控仪的应用我厂首先在自应力压力管二车间安装了三台数控仪,用开关切换的方法,控制四个蒸养坑的蒸汽养护。数控仪给定最低温度为30℃,如因第一池蒸养,池内温度低于最低给定温度时,电磁阀也会自动开阀,喷出蒸汽。当蒸养坑达到最低给定温度时,计时秒钟开始显示,秒钟跳动一分钟后,蒸养仪开始计时。由于仪器控制温度相当准确,因此必须对池中实际温度进行测定。经热电偶测定,蒸养坑的上、下温差一般为10℃左右。由于数控仪的感温热电偶安装在蒸养坑的中间,所测温度一般接近于蒸养坑的平均温度,而设计
Our factory cement products generally adopt pit-type steam curing. Since November 1982, we have used the ZWK-B type digital steaming temperature automatic program controller, and achieved a hot medium orientation loop in the pit, which greatly improved the The degree of automation of Yan Yang’s control. First, the application of ZWK-B type steamed digital control instrument Our factory first installed three numerical control instruments in the second workshop of the self-stress and pressure tube, and used the switch method to control the steam curing of four steaming and raising pits. The numerical control instrument gives a minimum temperature of 30°C. If the temperature in the tank is lower than the minimum given temperature due to the first tank steaming, the solenoid valve will automatically open and discharge steam. When the steaming pit reaches the minimum given temperature, the time of seconds is displayed, and after one second of the second bounce, the steaming apparatus starts timing. Since the instrument controls the temperature very accurately, the actual temperature in the cell must be determined. As determined by thermocouples, the temperature difference between the upper and lower sides of steaming pits is generally around 10°C. Since the temperature-sensing thermocouple of the numerical control device is installed in the middle of the steaming pit, the measured temperature is generally close to the average temperature of the steaming pit, and the design