Dispensing – Molten metal dispensing – Flow controllers or assists
222606, 266236, B22D 4122
The present invention relates to a pouring device for a steel or metal container such as a continuous pouring distributor or a pouring ladle.
A pouring device comprises elements of refractory material traversed by a pouring duct which terminates in an outer tube known as an external spout. When the molten metal is poured the refractory wall of the pouring duct and of the outer spout erodes considerably under the effect of the high temperature of the liquid metal and, in particular, the external spout must be replaced frequently. It is for this reason that a means is provided so that the external spout may be replaced as quickly as possible so as to fully reduce the immobilization time of the container and in particular in the case of the continuous pouring.
The European patent 0192019 describes a feeding and exchange device for the outer pouring tube in a pouring device, as a result of which the external spout can be replaced rapidly. The external spout is attached to a movable base of refractory material, this movable base being placed under a fixed plate of refractory material which is pierced with a pouring aperture and fastened to the base of the container. A spring mechanism pushes upwards on the base which carries and clamps the base of the external spout against the fixed plate which serves as a reference plate. The aim of the present invention is to provide the feeding and exchange device for the pouring tube briefly described hereabove with a movable element which enables the pouring pipe to be sealed off between the container and the outer spout. A sealing element of this type is certainly known per se and consists of a plate of refractory material pierced with at least one pouring aperture and mounted in such a way that it can slide by means of translation or rotation with respect to the fixed plate. In the known devices the sliding plate which serves as a seal is mounted against the fixed plate in such a way that it can slide on the contact surface of the fixed plate whilst ensuring that perfect impermeability is achieved. This assembly is usually achieved by pushing the movable plate against the fixed plate which serves as a reference plate for the whole of the device.
The use of a sliding seal placed in the known way with a feeding and exchange device for the pouring tube according to the precited European patent 0192019 would pose a problem of impermeability between the seal and the movable tube carrier base. In addition, a construction of this type would render the use of a pouring tube or external spout with adjustable output difficult.
The present invention solves the problem using a pouring device which may be sealed comprising a fixed refractory plate which is attached under the base of the container and pierced with a pouring aperture co-axial to the pouring duct of the container, and a plate serving as a base for an external pouring tube, which device is noteworthy in that it comprises in addition a seal placed in such a way that it slides against the lower side of the fixed plate so as to assume a position which allows the metal liquid contained in the container pass through or assume a position which seals the pouring passage; a fixed reference plate mounted against the lower side of the seal, the lower side of the reference plate being placed against the upper side of the base plate, and the reference plate being pierced with a pouring aperture which is co-axial to the pouring duct for the external pouring tube. Clamping means are provided in order to push and maintain the base plate against the lower side of the reference plate and in order to push the fixed plate and the seal towards the reference plate and to maintain the clamped seal against the upper side of this reference plate. The advantage of the invention is that a movable external spout with adjustable output can be provided.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is shown in detail in the following using the enclosed diagrams.
FIG. 1 is a plan view of a pouring device according to the invention.
FIG. 2 is a
patent: 4415103 (1983-11-01), Shapland et al.
patent: 4887748 (1989-12-01), Hicks
International Industrial Engineering S.A.
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