SK277851B6 - Closing device for pouring from iron or metallurgic container - Google Patents

Abstract

Closing in form of movable plate (22) is fitted in this way, that by displacement on upper side of strengh of plate (21) enables transfer of metal melt from container, or can also close the flow of melt, at which device next consists from strengh of plate (23) attached opposite of lower side of movable plate (22), at which lower side of referential plate (23) is located opposite of upper side of basic plate (24) and referential plate (23) is redrilling with casting opening co-axiall with casting canal (17) of external casting spout (25). Set is keeped clamped by clamping means (28, 31).

Description

Technical field

The invention relates to a closable device for casting from an iron or metallurgical container, such as a continuous casting divider or a ladle.

BACKGROUND OF THE INVENTION

The casting apparatus consists of elements of a refractory material through which the casting channel ends, ending with an outer tube, called an outer nozzle. During casting of the melt, the wall of the meltable material forming the casting channel and the outer nozzle breaks up due to the elevated temperature of the melt so that it is then necessary to change the outer nozzle frequently. It is therefore necessary to provide for an embodiment which allows the external nozzle to be replaced as quickly as possible and to minimize the time required for the container to be at rest, particularly in the case of continuous casting.

A known solution according to European patent no. 0192019 discloses a device for holding and replacing an outer discharge pipe in a foundry device, wherein the replacement of the outer pipe can be done quickly. The external spout is prepared on a replaceable refractory bottom. This replaceable lower part is placed under a fixed plate of refractory material with a casting hole which is fixed against the bottom of the container. The spring mechanism exerts an upward pressure on the bearing surface, which carries and closes the outer nozzle against the fixed plate that clamps the reference plate.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for holding and replacing a casting tube, as described briefly, with a movable device for closing the casting channel between the container and the external nozzle. Such a locking mechanism consists of a refractory plate drilled through at least one casting hole and mounted so that it can slide translationally or rotatably against the fixed plate. In these known embodiments, the conduit plate and the closure plate are mounted against the plate so that it can slide over the surface of the rigid plate while providing complete tightness. This assembly is usually done by pushing the movable plate against a fixed plate that serves as a reference plate in such an assembly.

The use of a slide closure mounted in a known manner with a device for holding and replacing the casting tube according to the aforementioned European Patent No. 01292019 made it difficult to maintain the tightness between the closure and the bearing surface carrying the replaceable tube. Such a design also makes it difficult to use a casting tube or an external nozzle with the possibility of regulating the flow rate.

The above-mentioned drawbacks are overcome by the closable casting device according to the invention which comprises a movable plate-shaped closure adapted to allow the metal melt contained in the container to pass through the underside of the fixed plate or to close the melt passage wherein the lower side of the reference plate is located opposite the upper side of the base plate and the reference plate is drilled through a coaxial orifice with a casting channel of the outer casting tube. Clamping means are used to apply pressure to the plate abutting the bottom surface of the reference plate and to press the fixed plate and closure against the reference plate and to keep the closure closed against the upper side of the reference plate. An advantage of the invention is that it permits the use of a replaceable external nozzle with adjustable flow rate.

BRIEF DESCRIPTION OF THE DRAWINGS

The exemplary embodiment is explained in detail in the following and is shown in the drawings, wherein FIG. 1 is a view of the casting apparatus according to the invention, FIG. 2 is a section through the plane Π - Π and FIG. 3 is a section through the plane ΠΙ - M.

DETAILED DESCRIPTION OF THE INVENTION

The embodiment shown is a continuous casting distributor device. The bottom of the manifold is indicated by position 10 in FIG. Position 12 denotes an inner nozzle which is known to be housed in a brick 11 walled in the refractory inner lining of the distributor. The lower end of the inner nozzle 12 is formed into a throat located on the upper side of the fixed plate 21, which is of refractory material, is drilled through a casting hole 14, coaxial with the foundry channel 13 of the inner nozzle 12. The fixed plate 21 is mounted in the crown of support 28 held in a housing 20, which will be explained below.

Underneath the fixed plate 21 is a movable plate 22 made of refractory material and drilled through a casting aperture 15 which, in the position shown in Fig. 2, is coaxial with the casting aperture 14 in the fixed plate 21. The movable plate 22 is mounted so 3 to move along the fixed plate 21 and in the direction indicated by the arrow M in FIG. 3, i.e. the movable plate moves in a direction perpendicular to the plane of FIG. 2 under the action of a pushing arm 27 driven in a known manner. When the movable plate 22 is displaced by sliding the longitudinal fixed plate 21, it then closes the foundry channel.

Underneath the movable plate 22, which serves as a slide closure, there is mounted a fixed plate 23 of refractory material, which is drilled through a casting hole 16 associated with the holes 14 and 15 and with a casting channel 13. The reference plate is fixed to the housing 20, which is 3. The reference plate 23 serves to mount the device as will be illustrated below.

Located below the reference plate 23 is a base plate 24 firmly pressed against the spout 25 or the external nozzle. The base plate and outer nozzle assembly 24-25 is positioned by horizontal displacement by the pushing arm 18 and is held by the arms forming part of the housing 20. The pouring channel 17 of the outer nozzle 25 is associated with the outlet channel 13 of the inner nozzle 12.

In such a casting device as described herein, the reference plate 23 disposed between the movable plate 22 and the outer nozzle base plate 24 serves as a common reference plate for compressing the device assembly within the housing 20. On one side is the base plate and nozzle assembly 24 25 applied and clamped against the lower side of the reference plate 23 by an upward pressure exerted by the ends of the arms 33 due to the spring pressure.

Regarding the other side of the plates, i. of the fixed plate 21a of the movable plate 22 of the closure device, these are then pushed to the upper side of the reference plate 23 by the pressure of the arms of the crown 28 holding the fixed plate 21.

It can be seen from FIG. 2 that the crown 28 is held in position due to the pressure of the springs 35, the action of which is transmitted to the crown 28 by the buttons 36 mounted on the rocking axis 37. In the illustrated embodiment six springs 35 and buttons 36 are used. The screw 31 shown in FIG. 3 exerts a force on the crown 28 having a vertical component, which then exerts a constant vertical downward pressure, which allows stabilization of the wedge 28 during sliding of the movable plate 22.

Due to such an arrangement according to the invention, the board is perfectly stabilized, so that any lateral or vertical movement of the board is eliminated without the need to increase the clamping force.

On the other hand, the embodiment according to the invention makes it possible to advantageously use an external nozzle with a controlled melt supply. Fig. 3 shows an exemplary embodiment in which the axis B - B of the outer nozzle 25 and the opening in the reference plate 23 are offset relative to the axis A - A of the outlet channel 13 of the inner nozzle 12. The screw 34 allows blocking the horizontal position of the reference plate 23 so maintains it in a predetermined position during movement of the movable plate 22 while providing excellent tightness.

The embodiment described above can be successfully applied especially in the production of profiles by continuous casting.

Claims (5)

PATENT CLAIMS 1. A closable casting device of an iron or metallurgical container, consisting of a refractory rigid plate mounted beneath the bottom of a container with a casting aperture coaxial with the container outlet channel, and a plate serving as a base plate for an external foundry nozzle, characterized by: comprising a movable plate-shaped closure (22) adapted to displace on the underside of the fixed plate (21) the melt flow of the metal contained in the container, or to melt the melt flow therethrough, further comprising a fixed reference plate (23) mounted against the lower side of the closure (22), the lower side of the reference plate (23) being positioned against the upper side of the base plate (24) and the reference plate (23) being drilled through a casting hole (16) coaxial with the foundry channel (17) of the outer a pouring nozzle (25), the rigidity of the assembly being provided by clamping means (28, 33) ) adapted to press and hold the base plate (24) against the underside of the reference plate (23) and to press the fixed plate (21) and the movable plate (22) onto the upper side of the reference plate (23) and to press the movable plate (22) pressed against the upper side of the reference plate (23). Device according to claim 1, characterized in that the fixed plate (21) is pressed against the crown (28), wherein the springs (35) and the push buttons (36) are used to apply vertical pressure to the crown (28) so as to gripping the fixed plate (21) and the movable plate (22) of the cap against the reference plate (23). Device according to claim 2, characterized in that the crown (28) has a side inclined side (30) to which the screw (31) applies a pressure having a vertical component directed against the reference plate (23) so as to stabilize the crown (28) and a fixed plate (21) as the shutter (22) moves. Device according to claim 1, characterized in that the clamping means (28, 33) comprise arms (33) connected to a housing (20) which closes the device, the arms (33) supporting the base plate assembly (33). 24) and the outer nozzle (25) press the assembly against the underside of the reference plate (23). Device according to claim 1, 2 or 3, characterized in that the axis (B-B) of the foundry channel passing through the reference plate (23) and the assembly of the base plate (24) and the outer nozzle (25) is horizontally displaceable relative to the axis (A-A) of the spout (13) and the inner nozzle (12) of the container.