Continuous casting staged inwall submersed nozzle
Technical field
The utility model relates to a kind of continuous casting staged inwall submersed nozzle.
Background technology
Continuous casting is the important production process of modern steel metallurgy, and the effect of submersed nozzle is that metallic solution is incorporated into the crystallizer from tundish.Submersed nozzle is steel mill's continuous casting requisite parts of equipment, and it is except having the steel of guiding stream, and main is control and improves the flow regime of steel stream in crystallizer, and the interior liquid level of maintenance crystallizer is stable.As shown in Figure 1, be the general submersed nozzle of routine, the inwall of its submersed nozzle body 1 all is through-type, and molten steel enters from water inlet 11, flows out from delivery port 12 by through-type passage, and water inlet 11 is vertical setting with delivery port 12.Because the common through-type inwall of submersed nozzle makes molten steel that the generation of bias current be arranged when entering, easy deposition solid impurity product.The labile state of steel stream must influence the quality of molten steel.
The utility model content
The purpose of this utility model is to solve above-mentioned technical problem, and a kind of continuous casting staged inwall submersed nozzle is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of continuous casting comprises submersed nozzle body, mutual vertically disposed water inlet and delivery port, the stepped setting of water inlet inwall of wherein said submersed nozzle with staged inwall submersed nozzle.
Further, above-described continuous casting is with staged inwall submersed nozzle, wherein said stepped be to be inverted trapezoidal being formed by connecting by at least two, the end opening that described inversion is trapezoidal and second are inverted trapezoidal suitable for reading linking to each other.
Further, above-described continuous casting staged inwall submersed nozzle, wherein said back cut diameter is greater than lower port diameter.
The beneficial effects of the utility model are mainly reflected in: continuous casting can better be controlled molten steel flowing in the mouth of a river with staged inwall submersed nozzle, reduce the thickness of the unstable laminar flow in border, make that argon gas bubbles is more evenly distributed in the continuous casting in molten steel, reduce the deposition of solid impurity product, improve the quality of molten steel.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: common submersed nozzle generalized section of the prior art.
Fig. 2: the utility model continuous casting staged inwall submersed nozzle generalized section.
Wherein:
1 submersed nozzle body, 11 water inlets, 12 delivery ports
2 inwalls, 21 22 end openings suitable for reading
The specific embodiment
The utility model has disclosed a kind of continuous casting with staged inwall submersed nozzle, as shown in Figure 2, comprises submersed nozzle body 1, water inlet 11 and delivery port 12, the inwall 2 stepped settings of the water inlet 11 of wherein said submersed nozzle.Stepped is to fall trapezoidal shape by at least two to be connected to form, and 21 diameters suitable for reading of described inwall 2 are greater than end opening 22 diameters, and each trapezoidal end opening 22 is connected with next trapezoidal suitable for reading 21.
The utility model compared with prior art has the following advantages: continuous casting can better be controlled molten steel flowing in the mouth of a river with staged inwall submersed nozzle, reduce the thickness of the unstable laminar flow in border, make that argon gas bubbles is more evenly distributed in the continuous casting in molten steel, reduce the deposition of solid impurity product, improve the quality of molten steel.
The utility model still has multiple concrete embodiment, and all employings are equal to replacement or equivalent transformation and all technical schemes of forming, all drop within the claimed scope of the utility model.