油淬零件由于清洗不干净,回火时会产生大量油烟;污染车间空气,影响工人健康。多年来我厂井式回火炉采用图示抽风装置,效果很好。抽风罩由5毫米厚低碳钢板与4号角钢焊成,与炉盖的间隙为5毫米左右,抽风口设在炉盖支柱右侧(尺寸为200×40毫米), Oil quenching parts due to cleaning is not clean, tempering will produce a large number of fumes; pollution of the workshop air, affecting the health of workers. Over the years I plant Pit furnace stove used pictorial ventilation device, the effect is very good. Exhaust hood by 5 mm thick low carbon steel and 4 angle welded steel, and the cover of the gap is about 5 mm, exhaust port located on the right side of the lid (size 200 × 40 mm)