多区加热热电偶检定炉的温场研究  

Research on Temperature Uniformity of the Calibration Furnace with Multiple Calorifiers

作　　者：刘红彦 张帅星 徐震震 张开兴 张军 LIU Hong-yan;ZHANG Shuai-xing;XU Zhen-zhen;ZHANG Kai-xing;ZHANG Jun(Institute of Metrology of Hebei Province,Shijiazhuang,Hebei 050000,China;Panran Measurement and Calibration Technology Co.Ltd.,Taian,Shandong 271018,China)

机构地区：[1]河北省计量监督检测研究院,河北石家庄050000 [2]泰安磐然测控科技有限公司,山东泰安271018

出　　处：《计量学报》2022年第2期228-234,共7页Acta Metrologica Sinica

基　　金：山东省科技型中小企业创新能力提升工程项目和泰安高新区加快科技成果转化促进新动能培育计划(KJD202014)。

摘　　要：针对在热电偶检定过程中使用传统的检定炉用均温块所导致的控温滞后、恒温时间长、漏电及炉管弯曲等问题,研制出不用均温块温场也能满足相关规范要求的多区加热检定炉,以提高检测效率。根据JJF 1184-2007《热电偶检定炉温度场测试技术规范》对用均温块的传统单区加热检定炉与不用均温块的多区加热检定炉的温场分别进行测试;再用热电偶示值误差试验进行对比验证。结果表明,在400~1000℃温度范围内的各个校准点,不用均温块的多区加热检定炉在轴向温度场、径向温度场、热电偶示值误差等各项测试中,指标均优于用均温块的传统单区加热检定炉。In the process of thermocouple calibration,there are some problems such as temperature control lag,long constant temperature time,electric leakage and furnace tube bending caused by using the traditional thermostatic block for calibration furnace.Therefore,a calibration furnace with multiple calorifiers which can meet the requirements of relevant specifications without the temperature uniformity of the thermostatic block has been developed to improve the calibration efficiency.Firstly,according to JJF 1184-2007 Testing Specifications for Temperature Uniformity in Thermocouple Calibration Furnaces,the temperature uniformity of the traditional calibration furnace with single calorifier equipped with the thermostatic block and the calibration furnace with multiple calorifiers without the thermostatic block are tested respectively.Secondly,the two kinds of temperature uniformity are compared and verified by thermocouple indication error test.The results show that in the temperature range of 400~1000℃,the calibration furnace with multiple calorifiers without the thermostatic block is superior to the traditional calibration furnace with single calorifier equipped with the thermostatic block in the axial temperature uniformity,radial temperature uniformity,thermocouple indication error and other tests.

关 键 词：计量学 热电偶检定炉 均温块 多区加热 温场 

分 类 号：TB942[一般工业技术—计量学]