ZJ-7.5-12型外热式真空炉及其测控系统

ZJ-7.5-12 Model External Heating Vacuun Furnace and Control System

某大型钢铁公司薄钢板加热模拟试验采用一种外热式真空炉，详细叙述了该炉的结构、性能、特点及测控系统。真空室采用耐高温的合金制作，配置合理的密封结构及抽真空系统，使该炉在１２００℃高温时，达到４ｘ１０－４Ｐａ高真空，使薄钢板加热实现完全无氧化不脱碳的效果；炉子的测控系统采用７０８Ｐ型Ａ１微机控制仪表，配置ＰＩＤ调节，从工艺参数的设定、采集、比较到量的控制全部自动完成，测控系统具有较强的抗干扰能力，控温精度±１℃。应用表明：该炉结构紧凑，密封效果佳、能耗低，安全可靠，实用。

The construction and features of an external heating vacuum furnace are expounded. The vacuumchamber is made up of refractory alloy, reasonable sealing construction and pumping system are provided. Therefore,4×10-4 Pa can be reached at 1200℃,and scaleless and non-decarburizing heating can be realized. 708 model AImicroprocessor based control instrument is adopted in the control system .The system possesses strong anti-disturbanceand ±1℃ temperature control accuracy. The furnace operation is safe and reliable, and this type vacuum furnaceis applicable.[