Tundish upper nozzle structure

Abstract

The utility model relates to an upper nozzle structure of a tundish, which comprises an upper nozzle brick and a nozzle seating brick, the nozzle seating brick is sleeved outside the upper nozzle brick, the nozzle seating brick and the upper nozzle brick are arranged in a bottom hole of the tundish, a steel through hole is arranged in the upper nozzle brick, the upper nozzle brick is flush with the upper surface of the nozzle seating brick, a nozzle sleeve brick is arranged above the nozzle seating brick, and the nozzle sleeve brick is sleeved on the nozzle seating brick. The water gap sleeve brick and the water gap seat brick are connected in an embedded mode through the protruding block and the groove, a big-end-up conical sleeve brick steel flowing hole is formed in the water gap sleeve brick, the sleeve brick steel flowing hole is coaxial with the steel through hole of the upper water gap brick, the periphery of the bottom of the water gap sleeve brick is provided with a protruding edge exceeding the periphery of the water gap seat brick, and the periphery of the upper portion of the water gap sleeve brick and the protruding edge are in arc transition. The position of steel flow entering the steel flow channel is raised, impurities in a tundish are prevented from entering the water gap steel flow channel during casting, and casting failure is avoided. The nozzle sleeve brick and the nozzle seating brick are connected in an embedded mode through the groove and the protruding block, combination is tight, and steel seepage is completely eradicated. And the contact area of the steel flowing channel and the stopper is enlarged.

Description

Technical Field

[0001] The utility model relates to a tundish water inlet structure, in particular to an upper water inlet structure of a tundish. Background Art

[0002] The steel flow channel at the bottom of the tundish is composed of the tundish upper nozzle + nozzle seat brick. The upper hole of the steel flow channel is larger than the lower hole. A vortex flow field is formed when the steel flows. When the steel is first passed, debris from the bottom of the tundish or cold steel from poor bottom baking is brought in.

[0003] Existing patent CN 202212547 U discloses a tundish water inlet, including an upper water inlet with a molten steel pouring channel and a base brick with a molten steel pouring channel used in conjunction with the upper water inlet, wherein the diameter of the molten steel pouring channel at the joint of the upper water inlet and the base brick is the same, and the molten steel pouring channel formed after the joint comprises an inverted flat-topped conical upper cavity and a cylindrical lower cavity connected to the lower end of the flat-topped conical cavity. This patent cannot filter impurities at the bottom of the ladle, which may easily cause pouring failure. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a tundish upper water inlet structure to solve the problem that impurities at the bottom of the tundish enter the steel flow channel.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tundish upper nozzle structure comprises an upper nozzle brick and a nozzle seat brick. The upper nozzle brick is sleeved with a nozzle seat brick, the nozzle seat brick and the upper nozzle brick are installed in the bottom hole of the tundish, a through-steel hole is arranged in the upper nozzle brick, the upper nozzle brick is flush with the upper surface of the nozzle seat brick, a nozzle sleeve brick is arranged above the nozzle seat brick, the nozzle sleeve brick and the nozzle seat brick are inlaid and connected by a convex block and a groove, a conical sleeve brick steel flow hole with a larger upper part and a smaller lower part is arranged in the nozzle sleeve brick, the sleeve brick steel flow hole is coaxial with the through-steel hole of the upper nozzle brick, a convex edge exceeding the outer periphery of the nozzle seat brick is arranged on the bottom outer periphery of the nozzle sleeve brick, and a circular arc transition is formed between the upper outer periphery of the nozzle sleeve brick and the convex edge.

[0007] The bottom diameter of the steel flow hole of the sleeve brick is larger than the upper diameter of the through steel hole of the upper water inlet brick.

[0008] The upper surface of the nozzle sleeve brick is 60-70 mm higher than the inner bottom surface of the tundish.

[0009] The top end of the through-steel hole is provided with a smoothly transitioned necking section.

[0010] The convex block ring is arranged on the lower surface of the nozzle sleeve brick and is an integral structure with the nozzle sleeve brick.

[0011] The groove ring is arranged on the upper surface of the water inlet seat brick.

[0012] The bottom of the water inlet brick is connected with an argon blowing pipe.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] The utility model raises the position where the steel flow enters the steel flow channel, prevents impurities in the tundish from entering the steel flow channel of the nozzle when pouring, and avoids pouring failure. The nozzle sleeve brick and the nozzle seat brick are inlaid and connected with grooves and protrusions, which are tightly combined to prevent steel seepage. The contact area between the steel flow channel and the stopper rod is enlarged, and the contact position of the stopper rod is an inclined surface, which prevents the stopper rod from having poor contact or insensitive control during the steel pouring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is the structural diagram of the water nozzle brick.

[0017] Figure 3 This is the brick structure diagram of the water nozzle seat.

[0018] In the figure: upper water inlet brick 1, water inlet seat brick 2, through steel hole 3, water inlet sleeve brick 4, sleeve brick flow steel hole 5, annular protrusion 6, annular groove 7, argon blowing tube 8. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means more than two.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] like Figure 1A tundish upper nozzle structure includes an upper nozzle brick 1 and a nozzle seat brick 2. The upper nozzle brick 1 is provided with a nozzle seat brick 2 on the outside. The nozzle seat brick 2 and the upper nozzle brick 1 are installed in the bottom hole of the tundish 9. A through-steel hole 3 is provided in the upper nozzle brick 1. The upper nozzle brick 1 is flush with the upper surface of the nozzle seat brick 2. A nozzle sleeve brick 4 is provided above the nozzle seat brick 2. The nozzle sleeve brick 4 is connected to the nozzle seat brick 2 through a protrusion 6 and a groove 7. A conical sleeve brick flow hole 5 with a larger upper part and a smaller lower part is provided in the nozzle sleeve brick 4. The sleeve brick flow hole 5 is coaxially arranged with the through-steel hole 3 of the upper nozzle brick 1. The bottom periphery of the nozzle sleeve brick 4 is provided with a convex edge 10 that exceeds the periphery of the nozzle seat brick 2 to preliminarily filter the debris and cold steel on the bottom of the ladle. The upper periphery of the nozzle sleeve brick 4 and the convex edge 10 are in a circular arc transition. Avoid the cold steel and debris formed in the initial stage of pouring from entering the steel flow channel.

[0022] The bottom diameter of the steel flow hole 5 of the sleeve brick is larger than the top diameter of the through steel hole 3 of the upper water inlet brick 1, so as to enlarge the contact area between the steel flow channel and the stopper rod, ensure that the bottom end of the stopper rod is in close contact with the upper water inlet brick, and can be sensitively controlled.

[0023] The upper surface of the nozzle sleeve brick 4 is 60-70 mm higher than the inner bottom surface of the tundish 9, raising the position where the steel flow enters the steel flow channel and reducing the entry of debris from the bottom of the ladle into the steel flow channel.

[0024] The top of the through-steel hole 3 is provided with a smoothly transitioned necking section.

[0025] The protrusion 6 is arranged around the lower surface of the nozzle casing brick 4 and is an integral structure with the nozzle casing brick 4 .

[0026] The groove 7 is arranged around the upper surface of the nozzle seat brick 2 .

[0027] The bottom of the water inlet brick 1 is connected to an argon blowing pipe.

[0028] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example

[0030] A tundish upper nozzle structure comprises an upper nozzle brick 1 and a nozzle seat brick 2. The upper nozzle brick 1 is sleeved with the nozzle seat brick 2. The nozzle seat brick 2 and the upper nozzle brick 1 are installed in the bottom hole of the tundish 9. A through-steel hole 3 is provided in the upper nozzle brick 1. The upper surfaces of the upper nozzle brick 1 and the nozzle seat brick 2 are flush. A nozzle sleeve brick 4 is provided above the nozzle seat brick 2. The upper surface of the nozzle sleeve brick 4 is 60 mm higher than the inner bottom surface of the tundish 9.

[0031] The nozzle sleeve brick 4 is connected to the nozzle seat brick 2 by inlaying the protrusion 6 and the groove 7. The protrusion 6 is arranged on the lower surface of the nozzle sleeve brick 4 and is an integral structure with the nozzle sleeve brick 4. The groove 7 is arranged on the upper surface of the nozzle seat brick 2.

[0032] A conical steel hole 5 with a larger upper part and a smaller lower part is provided in the water inlet brick 4. The steel hole 5 is coaxially arranged with the through-steel hole 3 of the upper water inlet brick 1. The top of the through-steel hole 3 is provided with a smoothly transitioned shrinking section. The bottom diameter of the steel hole 5 is larger than the upper diameter of the through-steel hole 3 of the upper water inlet brick 1.

[0033] The bottom periphery of the nozzle sleeve brick 4 is provided with a convex edge 10 which exceeds the periphery of the nozzle seat brick 2, and a circular arc transition is formed between the upper periphery of the nozzle sleeve brick 4 and the convex edge 10. The bottom of the upper nozzle brick 1 is connected to an argon blowing pipe.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tundish upper nozzle structure, characterized in that: It comprises an upper nozzle brick and a nozzle seat brick. The nozzle seat brick is sleeved on the outer side of the upper nozzle brick. The nozzle seat brick and the upper nozzle brick are installed in the bottom hole of the tundish. A through-steel hole is arranged in the upper nozzle brick. The upper nozzle brick is flush with the upper surface of the nozzle seat brick. A nozzle sleeve brick is arranged above the nozzle seat brick. The nozzle sleeve brick and the nozzle seat brick are inlaid and connected by protrusions and grooves. A conical sleeve brick steel flow hole which is larger at the top and smaller at the bottom is arranged in the nozzle sleeve brick. The sleeve brick steel flow hole is coaxial with the through-steel hole of the upper nozzle brick. A convex edge which exceeds the outer periphery of the nozzle seat brick is arranged on the bottom periphery of the nozzle sleeve brick. An arc transition is formed between the upper periphery of the nozzle sleeve brick and the convex edge.

2. The tundish upper nozzle structure according to claim 1, characterized in that: The bottom diameter of the steel flow hole of the sleeve brick is larger than the upper diameter of the through steel hole of the upper water inlet brick.

3. The tundish upper nozzle structure according to claim 1, characterized in that: The upper surface of the nozzle sleeve brick is 60-70 mm higher than the inner bottom surface of the tundish.

4. The tundish upper nozzle structure according to claim 1, characterized in that: The top end of the through-steel hole is provided with a smoothly transitioned necking section.

5. The tundish upper nozzle structure according to claim 1, characterized in that: The convex block ring is arranged on the lower surface of the nozzle sleeve brick and is an integral structure with the nozzle sleeve brick.

6. The tundish upper nozzle structure according to claim 1, characterized in that: The groove ring is arranged on the upper surface of the water inlet seat brick.

7. The tundish upper nozzle structure according to claim 1, characterized in that: The bottom of the water inlet brick is connected with an argon blowing pipe.

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