公开(公告)号：US4171798A

公开(公告)日：1979-10-23

申请号：US887024

申请日：1978-03-16

申请人： Joseph A. Vietorisz

发明人： Joseph A. Vietorisz

IPC分类号： C21B7/16

CPC分类号： C21B7/16

摘要： In a blast furnace tuyere, operating at subsonic velocity, an inner cylindrical air conduit is reduced to a frusto-conical conduit near the tuyere nose. A water cooled, pear-shaped, hollow body within the tuyere is held suspended by a bracket, in a centered position, where it exerts minimum interference with the pressurized fluid flowing partly through it and partly around it, having a cylindrical smaller conduit in such body and an annulus between the outer perimeter of such body and the inner wall of the cylindrical or conical conduit of the tuyere.The bracket slides parallel to the tuyere axis in guides, which are integral parts of the tuyere proper, thereby securing a centered position whenever the bracket is approaching to or retreating from the tuyere nose. The area of the annulus is uniformly decreasing when the body on the bracket is moving toward the tuyere's nose; consequently, the air jet velocity through the tuyere is increased but, by virtue of the diverging-converging inverse annular nozzle between the frusto-conical conduit and the pear-shaped suspended body, a near parallel air current with optimum thrust can be maintained at any position of the body.A driving mechanism serves to actuate the movement of the bracket and body; the driving mechanism being externally mounted at an accessible location.

摘要翻译： 在鼓风炉风口中以亚音速运行，内圆柱形空气导管在风嘴附近被还原成截头圆锥形导管。 在风口内的水冷梨形空心体由支架悬挂在中心位置，在该中心位置对其部分地通过其并且部分围绕其流动的加压流体施加最小的干扰，其中具有圆柱形较小的导管 主体和这种主体的外周与风口的圆柱形或锥形导管的内壁之间的环形空间。