| 摘要 |
1. One-piece inner nozzle (2) constituted of a tubular part (6) defining a pouring channel (4) and a plate (7) providing contact with the downstream component of the pouring channel, characterised in that the plate (7) is generally shaped as a prism which can be defined by its polygon-shaped bases and the prismatic surface which they intersect perpendicularly, the said polygonal bases comprising an upper base (22), whose displacement within the prismatic surface defines the interface with the tubular part (6) and a lower base (21), parallel to the upper base and, on either side of the upper base, two sides (23, 23') forming an obtuse angle (alpha) with the upper base (22). 2. Inner nozzle according to claim 1, characterised in that the polygonal bases comprise at least two additional sides (24, 24') so that the polygon has no sharp angles. 3. Inner nozzle according to either of claims 1 or 2, characterised in that the edges of the plate (7) corresponding to the upper bases (22) of each of the two polygonal bases of the prism are truncated. 4. Inner nozzle according to any of claims 1 to 3, characterised in that the plate (7) of the inner nozzle is not symmetrical. 5. Inner nozzle according to claim 4, characterised in that the non-symmetry of the plate (7) is realised by truncating the corners of the plate. 6. Inner nozzle according to claim 4, characterised in that the non-symmetry of the plate (7) is realised by the fact the corners (25, 25', 26, 26') of the plate are rounded with a different radius of curvature for each pair. 7. Clamping device for an inner nozzle, characterised in that it includes at least two assemblies each composed of a clamp (10) pivoting about a horizontal axis (11) and fitted with a groove (12) receiving a shoe (13) generally cylindrical in shape incorporating a flat surface (14) parallel to the axis of said cylinder, said shoe (13) being capable of pivoting in the groove (12). 8. Clamping device according to claim 7, characterised in that the groove (12) in the clamp (10) is generally cylindrical in shape and the axis of the groove (12) is located at a distance at least greater than the radius of the said cylinder, preferably at a distance very slightly greater. 9. Clamping device according to claim 8, characterised in that the clamp (10) incorporates a bore (17) in a direction orthogonal to the axis of the groove (12), the bore (17) lying flush with the surface of the groove (12), and in that the shoe (13) incorporates a groove (18) in a direction orthogonal to its axis and similar in size to the bore (17) in the clamp, this groove (18) being situated opposite the flat (14) of the shoe (13), the bore (17) of the clamp and the groove (18) of the shoe being capable of receiving an element generally tubular in shape (19). 10. Clamping device according to any of claims 7 to 10, characterised in that the clamp (10) is provided with a slot (20) into which engages the inclined end (50) of the eccentric part of a cam (15) pivoting about a vertical axis (16). |
