论文部分内容阅读
现有平炉几乎全是使用水冷炉门,炉门下水管大多数采用橡胶管。这种橡胶管的主要缺点是使用寿命短,经常需要更换。据初步统计,每根胶皮管的平均寿命为五天,每个炉门下水管长2.5米,若以作业率90%、每座平炉三个炉门计算,每年需要用橡胶管493米,成本费4045元。为了提高下水管的寿命,天津钢厂的老工人经过多次试验改进,试制成功了“竹节”套管,代替了橡胶管,实践证明使用效果良好。这种下水管的装配与连接见图1图2。它是由26节锥形铁管套结而成的,每个锥形小管是用2-3毫米厚的下脚料钢板焊成,管的大头外径为60毫米,小头外径为40毫米,在小头外面四周焊一个小环,宽度为5毫米,套入另外一个锥形的大头内,然后再在大头的口内焊接一个小环,宽度亦为5毫米,这样两个雏形环
Most of the existing hearth furnaces are water-cooled furnace doors, and the majority of furnace door drains use rubber tubes. The main disadvantage of this rubber tube is the short service life, often need to be replaced. According to preliminary statistics, the average life span of each rubber hose is five days, and the length of the water pipe under each door is 2.5 meters. If the operation rate is 90%, calculation of three furnace doors per open hearth requires 493 meters of rubber hose each year, 4045 yuan. In order to improve the life of the sewer pipe, the old workers in Tianjin Steel Mill improved their trial and error so that the “bamboo” casing was successfully trial-produced instead of the rubber tube. Practice proved that the effect was good. This sewer assembly and connection shown in Figure 1 Figure 2. It is made of 26 conical iron pipe nested, each tapered tube is 2-3 millimeters of scrap steel plate welding, the pipe outer diameter of 60 mm, small head diameter of 40 mm , A small ring welded around the outside of a small head, a width of 5 mm, set into another cone-shaped head, and then welded in the bulk of a small ring, the width is also 5 mm, so that the two prototype ring