RU12886U1 - SUBMERSIBLE GLASS - Google Patents

Description

SUBMERSIBLE GLASS

The utility model relates to ferrous metallurgy and is intended for casting steel and liquid metals.

When casting steel and other metals, the flow and direction of the molten metal into the mold, mold or chill shaft under the level is made using an immersion nozzle. Submersible glass refers to heavily loaded and worn products.

A steel-pouring submersible cup is known (RF Patent No. 2098223, IPC6 B22D 11/10, 41/50; 12/10/97). The glass is made of refractory material in the form of a conical pipe with a flange, a blank bottom and diametrically located outlet openings adjacent to the bottom, the surface of which inside the pipe has the shape of a divider with certain geometric parameters.

Currently, the change of immersion nozzles in a number of continuous casting machines is carried out automatically using technical means of maintaining and manipulating the immersion nozzle. Therefore, the flange and the upper part of the immersion nozzle must have enhanced strength properties, ensuring the integrity of the nozzle when changing them. The known design of the steel pouring glass does not allow its use in continuous metal casting systems with their automatic change due to low strength properties.

A filling device is known (French Patent No. 2635030, IPC5 B22D 41/54, С04В 35/02; 07/18/1988), which is taken as a prototype.

MPK6 B22D 41/50, 41/56

holes. The pipe has a conical extension along its upper surface, and a rectangular flange in the upper part. The upper part of the pipe is hardened due to its conical or cylindrical expansion, as well as due to the metal shell covering it; the flange and the upper part of the pipe in the zone of its expansion. The metal shell serves as a means of protecting the material of the pipe when it is replaced during canting. In addition, when changing it, the pipe can be moved by sliding the flanges enclosed in a metal shell along the guides and is resistant to friction caused by sliding. The disadvantages of the pipe include a significant thickness of the metal shell reaching a thickness of 3 mm or more, which complicates the manufacture of a profile metal shell by deep drawing. A significant expansion of the pipe in the upper part leads to unreasonable overspending of the refractory material.

This utility model solves the problem of hardening a submersible nozzle in its upper part, increasing the reliability of its operation, as well as simplifying the manufacturing technology of the metal shell and reducing the cost of the submersible nozzle.

To solve the problem in a submersible nozzle made in the form of a cylindrical pipe with a conical extension in the upper part on the outer surface and an axial cylindrical channel, a rectangular flange made separately or integral with the pipe, and a metal shell covering the flange and the upper conical part of the pipe, metal the shell is made of two-element, the first element is box-shaped and covers a rectangular flange, and the second element is made of

a cylindrical cup pressed onto a cone with a taper angle equal to Ztl of the conicity of the conical part of the pipe with the formation of at least two corrugations that perform the function of stiffeners, covering at least part of the conical section of the pipe and fixed to the bottom of the first shell element. Two ribs should be placed diametrically on the shell.

The number of corrugations (stiffeners) can be made more than two, for example three or six, while they are located on the second element of the metal shell, covering the upper conical section of the pipe evenly around its perimeter. The thickness of the second element of the metal shell due to the presence of stiffeners can be reduced to 0.5 - 2.5 mm.

In FIG. 1 shows a longitudinal section through a submersible nozzle and along the plane of one of the corrugations, in which the straight-flange and pipe are made separately; figure 2 is a view a of figure 1; in Fig.Z - the same as in Fig.1, and the pipe and flange are made as a single unit; figure 4 is a view In Fig.Z.

Submersible glass consists of a pipe 1, mainly of refractory material, with an axial cylindrical channel 2, a blind bottom 3 and diametrically located outlet openings 4. On the outer surface of the pipe in the upper part is made on a cone 5. The taper angle of the upper part of the pipe can be 10-30 °. In the upper part of the pipe 1 has a flange 6, which can be made integral with the pipe 1 (Fig.1) or separately (Fig.Z).

Around the flange 6 and the conical part 5 of the pipe 1 is fixed by means of a mortar 7 a metal shell. The shell is made of two elements. The first box-shaped element 8 of the metal shell covers the flange 6 of the glass. The second conical element 9

the metal shell covers the upper conical part 5 of the pipe 1. The second element 9 of the metal shell is made of a cup pressed onto a cone with a fragile taper equal to the conic angle of the conical part 5 of the pipe 1, fixed, for example, by welding, on the bottom of the first element 8 of the metal shell. The stiffening ribs 10 are made on the second element 9. The ribs 10 are made by crimping onto the cone of a cylindrical glass with free flowing of excess metal in the die cavity and the formation of corrugations. The number of corrugations 10 (stiffeners) must be at least two, which are diametrically or evenly distributed along the perimeter of the second element 9, if there are more than two. With this design of the cup, the thickness of the second element 9 of the metal shell can be reduced to 0.5 - 2.5 mm. In the first element 8 of the metal shell can be made technological holes 11.

In the manufacture of the second element of the metal shell 9, a cylindrical cup (initial billet) is pressed onto a cone with a taper angle equal to the taper angle of the upper conical part 5 of the pipe 1, thereby forming corrugated corrugations 10. The resulting semi-finished product is fastened with a rectangular box-shaped part 8 of the metal shell, for example, by welding along the welds 12. After that, the two-element shell is mounted on pipe 1 with flange 6 with mortar pits. In this case, the mortar 7 fills the cavity of the corrugations 10, and its excess is squeezed out through the technological holes 11 and the gap between the pipe 1 and the shell 9. The corrugations 10, the cavities of which are filled with the mortar 7, play the role of stiffeners.

When replacing the immersion nozzle in the upper part along the metal shell 9 with stiffening ribs 10, they are wrapped around by a tilter (not shown in the drawing). By turning around a horizontal axis

the immersion cup is fed into the mold and mounted with a rectangular flange 6 on the rails. The hydraulic cylinder acts through the metal shell 8 on the end face of the rectangular flange 6, moving the immersion cup along the guides from the loading position to the working position or to the closing position along the axis line of the pouring hole. In the working position, the metaplane stream entering the glass from the intermediate ladle leaves the glass through the outlet openings 4 into the mold under the level of the metal in it. When practicing a given number of casting cycles, the immersion nozzle is replaced with a new one by automatically shifting it along the guides. The spent glass is also removed by the tilter by grasping it in the upper part and turning it around the horizontal axis.

The claimed design of the immersion nozzle has increased rigidity in the upper part due to the supply of a metal shell with stiffening ribs. This eliminates the destruction of the immersion nozzle under the action of bending moment during its rotation, installation and replacement. The presence of stiffening ribs on the side of the immersion nozzle reduces the thickness of the metal shell without reducing its rigidity. And this, in turn, makes it possible to significantly simplify the manufacturing technology of both the metal shell and the entire glass. Stiffening ribs can significantly reduce the taper angle of the conical section of the pipe, which reduces the consumption of scarce refractory material.

Claims (3)

1. A submersible cup made in the form of a cylindrical pipe with a conical extension in the upper part on the outer surface and an axial cylindrical channel, a rectangular flange made separately or integral with the pipe, and a metal shell covering the flange and the upper conical part of the pipe, characterized in that the metal shell is made of two elements, the first element is box-shaped and covers a rectangular flange, and the second element is made of a cylindrical glass pressed onto a cone with a cone angle spacing equal to the conic angle of the conical part of the pipe, with the formation of at least two corrugations that perform the function of stiffeners, covering at least part of the conical section of the pipe and fixed to the bottom of the first element of the metal shell.  2. The glass according to claim 1, characterized in that at least three corrugations uniformly placed along its perimeter are made on the second element of the metal shell covering the upper conical section of the pipe. 3. The glass according to claim 1, characterized in that the thickness of the second element of the metal shell is 0.5 to 2.5 mm.