The utility model relates to a heat preservation structure of a vacuum furnace, in which a space is reserved between the material cushion bricks; a dog tooth staggered structure is formed at the joint of the material cushion brick heat preservation felt and the heating body cushion brick heat preservation felt, with good sealing and heat preservation effect and even temperature. The insulating felt of the material seat is placed in two groups. The diameter of the insulating felt on the upper part of the material seat cushion brick is smaller than the diameter of the insulating felt on the lower part of the material seat cushion brick. The trapezoid structure is formed, and the gradient meshing with the insulating felt on the base of the heating body is formed to form damping, which can effectively prevent the radiation of the temperature field and increase the size of the uniform temperature area. The insulating felt of the material base is stacked in two groups. The diameter of the upper group of insulating felt is smaller than that of the lower group, forming a trapezoid structure. The two groups of thermal insulation blankets on the base of the heating body are stacked in inverted trapezoid. The gradients of the thermal insulation blankets mesh with each other to form a damping structure, block the heat radiation path, effectively prevent the loss of temperature field and increase the size of the uniform temperature area. The technical measures adopted by the invention effectively improve the uniformity of the furnace temperature, improve the product quality and eliminate the potential safety hazard.
【技术实现步骤摘要】
一种真空炉的保温结构
本专利技术涉及一种真空感应炉下出料炉体内部底座结构。特别是针对提高真空感应炉底座保温性能的场合。
技术介绍
真空感应炉一般工作在几百到几千度之间,炉温均匀性在±15℃之内。真空感应炉能否在相应的温度下连续正常运行,关键取决于炉体内的保温材料和结构。真空感应炉炉膛结构由外到内依次是感应线圈、保温毡、发热体。炉子采用下进出料结构时,料车底盘上是料座垫砖、保温毡,保温毡与料座垫砖外径等尺寸,保温毡采用多层叠放形式。为了进出料方便,料座保温毡外圆与发热体底座保温毡内圆有一定间隙。由于炉体固有结构,存在炉内温度不均匀的问题,一般地,炉内中心温度比炉内边缘温度高,炉内上层温度比炉内下层温度高,并且料座保温毡与发热体底座保温毡之间的间隙造成热量散失。由于炉内存在上述的温差,致使有效温区缩短,导致炉内上层产品比下层产品的处理效果好。如果控制炉内下层温度达到工艺要求温度,就要加大升温功率或延长保温时间,同时又使炉内上层产品过温。发热体垫砖及料座垫砖采用氧化铝材料,炉内温度辐射引起发热体垫砖及料座垫砖温度升高,而垫砖不是水冷结构,在进行较高温度的热处理时,出现垫砖氧化,高铝材料烧熔,结成琉璃块状。基于上述底座结构的缺陷与不足,曾经有单位在清理发热体垫砖烧化突出的琉璃块状物时发生爆炸,约1吨重的上炉盖拔掉与炉体固定的螺栓,冲上2米多高与房梁相撞。国内的同行生产企业均出现过料座垫砖与发热体垫砖烧流、粘结一起,无法降料盘取料的现象。检索国内外的专利文献和论文数据库,没有查找到与本专利技术最接近的现有技术。 ...
【技术保护点】
1.一种真空炉的保温结构,包括料座底板、料座垫砖碳毡、料座垫砖、发热体底板、保温毡、发热体垫砖、石墨料盘、发热体和炉体底板;所述保温毡分为发热体垫砖下部保温毡、发热体垫砖上部保温毡、料座垫砖下部保温毡、料座垫砖上部保温毡和发热体保温毡;所述料座垫砖碳毡安放料座底板的上表面;料座垫砖安放该碳毡的上表面;料座垫砖下部保温毡安放该料座垫砖的上表面;料座垫砖上部保温毡安放该料座垫砖下部保温毡的上表面;其特征在于:/n所述料座垫砖上部保温毡的直径比该料座垫砖下部保温毡的直径小,在二者之间的圆周表面形成阶梯;所述料座垫砖上部保温毡直径与料座垫砖下部保温毡直径单边的差为15~20mm;/n料座垫砖均匀排放该碳毡的上表面;多个发热体垫砖位于在所述料座垫砖的外圆周外侧,并均匀排布在所述发热体垫砖碳毡上;当某个发热体垫砖与某个所述料座垫砖的位置相对应时,该发热体垫砖的内弧面与该料座垫砖外弧面之间有10mm的间隙;所述发热体垫砖的数量大于所述料座垫砖的数量。/n
【技术特征摘要】
1.一种真空炉的保温结构,包括料座底板、料座垫砖碳毡、料座垫砖、发热体底板、保温毡、发热体垫砖、石墨料盘、发热体和炉体底板;所述保温毡分为发热体垫砖下部保温毡、发热体垫砖上部保温毡、料座垫砖下部保温毡、料座垫砖上部保温毡和发热体保温毡;所述料座垫砖碳毡安放料座底板的上表面;料座垫砖安放该碳毡的上表面;料座垫砖下部保温毡安放该料座垫砖的上表面;料座垫砖上部保温毡安放该料座垫砖下部保温毡的上表面;其特征在于:
所述料座垫砖上部保温毡的直径比该料座垫砖下部保温毡的直径小,在二者之间的圆周表面形成阶梯;所述料座垫砖上部保温毡直径与料座垫砖下部保温毡直径单边的差为15~20mm;
料座垫砖均匀排放该碳毡的上表面;多个发热体垫砖位于在所述料座垫砖的外圆周外侧,并均匀排布在所述发热体垫砖碳毡上;当某个发热体垫砖与某个所述料座垫砖的位置相对应时,该发热体垫砖的内弧面与该料座垫砖外弧面之间有10mm的间隙;所述发热体垫砖的数量大于所述料座垫砖的数量。
2.如权利要求1所述真空炉的保温结构,其特征在于,所述发热体底板套装在所述料座垫砖的外圆周上,并且该炉体底板的内表面与料座垫砖的外表面之间有10mm的间隙。
3.如权利要求1所述真空炉的保温结构,其特征在于,所述发热体垫砖碳毡套装在所述料座垫砖的外圆周上,并安放在所述发热体底板上;该发热体垫砖碳毡的内表面与料座垫砖的外表面有10mm的间隙。
4.如权利要求1所述真空炉的保温结构,其特征在于,发热体垫砖套装在所述料座垫砖的外圆周上,并安放在所述发热体垫砖上;该发热体垫砖的内表面与料座垫砖的外表面之间有10mm的间隙;发热体垫砖下部保...
【专利技术属性】
技术研发人员:刘汉和,胡喜莲,刘海平,崔鹏,何冰,陶庆,张挺,王瑞麟,
申请(专利权)人:西安航空制动科技有限公司,
类型:新型
国别省市:陕西;61
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