Novel long nozzle structure

Abstract

A novel long nozzle structure comprises a body, a hollow channel is formed in the body, a bowl part is arranged at the upper end of the hollow channel, an air inlet pipe is arranged on one side of a wrist part and communicated with an outer annular air channel, the outer annular air channel is communicated with an evenly-distributed air groove, an inner annular air groove is formed in the bowl part, and the inner annular air groove is communicated with the bowl part. The inner annular air groove is communicated with the outer annular air channel. Chemical elements in the air are completely prevented from entering molten steel through two radial argon plugging and axial inert gas dispersion, meanwhile, cold steel remaining in the bowl part during casting is blown away, a small amount of argon dispersed in the ladle collector nozzle steel outlet enters a tundish along the molten steel, upward turning of steel slag in the tundish is facilitated, the molten steel is purer, and the quality of molten steel is improved. Therefore, molten steel quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of long shrouds, in particular to a novel long shroud structure. Background Art

[0002] The shroud, also called the protective sleeve, is one of the three major parts of continuous casting, an indispensable continuous casting refractory product for protective casting in today's continuous casting steelmaking. The shroud is a transition channel connecting the ladle to the tundish. Its function is to prevent the molten steel from entering the tundish from secondary oxidation and splashing. The oxides generated by the contact between molten steel and air are the main source of inclusions in the finished product. With the continuous improvement of steelmaking process requirements, the development of the shroud has also changed from no inert gas protection to the introduction of argon protection casting, and the structure has also changed from adding breathable materials to the bowl to pressing the bowl mouth air groove.

[0003] The currently used long shroud has an unreasonable airway arrangement for argon flow, which results in uneven argon distribution and the mixing of other chemical elements in the air, thus affecting the purity of molten steel and reducing the quality of molten steel. This is the inadequacy of the prior art. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose a new type of long shroud structure.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a new type of long water nozzle structure, including a main body, a hollow channel is arranged in the main body, the upper end of the hollow channel is a bowl part, an air inlet pipe is arranged on one side of the wrist part, the air inlet pipe is connected with an outer annular air channel, the outer annular air channel is connected with a uniformly distributed air groove, an inner annular air groove is arranged in the bowl part, and the inner annular air groove is connected with the outer annular air channel.

[0006] A further improvement of the utility model is that the inner annular air groove is connected to the outer annular air channel through a plurality of inner and outer air groove channels.

[0007] A further improvement of the utility model is that the inner and outer air groove channels are horizontally arranged along the radial direction of the bowl portion.

[0008] A further improvement of the utility model is that the lower part of the inner annular air groove is also connected to a plurality of axially descending air grooves, and the axially descending air grooves are arranged in the bowl part.

[0009] A further improvement of the utility model is that the outer annular air passage is arranged at the upper end of the main body.

[0010] A further improvement of the utility model is that the evenly distributed air grooves are arranged at the top of the main body.

[0011] A further improvement of the utility model is that the inner annular air groove is located in the middle part of the bowl, and the height is 10-60mm away from the upper edge of the water outlet.

[0012] A further improvement of the utility model is that the height of the axially descending air groove is 50-70 mm, the width is 5-10 mm, and the depth is 5-10 mm.

[0013] A further improvement of the utility model is that the number of the inner and outer air groove channels is ≥4.

[0014] A further improvement of the utility model is that the number of the axially descending air grooves is ≥4.

[0015] The beneficial effects of the utility model are as follows: the utility model completely prevents chemical elements in the air from entering the molten steel through two radial argon sealings and axial inert gas diffusion, and at the same time blows away the cold steel remaining in the bowl during casting; a small amount of argon gas diffused in the water outlet of the large ladle enters the tundish along with the molten steel, which is also beneficial for the slag in the molten steel in the tundish to turn over, making the molten steel purer, thereby ensuring the quality of the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a specific implementation method of the utility model

[0017] Figure 2 for Figure 1 A magnified view of the structure in Figure 2.

[0018] In the figure, 1 is the main body, 11 is the hollow channel, 12 is the bowl, 2 is the air inlet pipe, 3 is the outer annular air channel, 4 is the uniformly distributed air grooves, 5 is the inner annular air grooves, 6 are the inner and outer air groove channels, 7 is the axially downward air grooves, and 8 is the outer shell. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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. The utility model is further described in combination with the drawings and embodiments:

[0020] like Figure 1-2As shown, a new type of long water nozzle structure includes a main body 1, a hollow channel 11 is arranged in the main body 1, the upper end of the hollow channel is a bowl portion 12, an air inlet pipe 2 is arranged on one side of the bowl portion 12, the air inlet pipe 2 is connected with an outer annular air channel 3, the outer annular air channel 3 is connected with a uniformly distributed air groove 4, an inner annular air groove 5 is arranged in the hollow channel 11, and the inner annular air groove 5 is connected with the outer annular air channel 3.

[0021] Among them, the outer annular air channel 3 is arranged at the upper end of the bowl 12; the uniformly distributed air grooves 4 are arranged at the top of the bowl 12; the inner annular air grooves 5 are located in the middle part of the bowl 12, and the height is 10-60mm from the upper edge of the water outlet.

[0022] Furthermore, the inner annular gas groove 5 is connected to the outer annular gas channel 3 through a plurality of inner and outer gas groove channels 6. The number of the inner and outer gas groove channels 6 is ≥ 4, and the number of the inner and outer gas groove channels 6 in the utility model is 4. Argon enters the outer annular gas channel 3 through the air inlet pipe 2, and then enters the inner annular gas groove 5 through the four inner and outer gas groove channels 6. The inner and outer gas groove channels 6 are horizontally arranged along the radial direction of the bowl 12 and are evenly arranged on the radial plane of the bowl 12, which ensures the uniform distribution of argon in the inner annular gas groove 5 and further improves the quality of the molten steel.

[0023] Furthermore, the lower part of the inner annular gas groove 5 is also connected to a plurality of axially descending gas grooves 7, which form an axial argon blockage and diffuse downward. The small amount of argon diffused downward enters the tundish along the molten steel and is also conducive to the upward turning of the slag in the molten steel in the tundish, making the molten steel purer. The number of the axially descending gas grooves 7 is ≥ 4, and the number of the axially descending gas grooves 7 in the utility model is 4, which ensures the uniformity of argon distribution.

[0024] Specifically, the axially descending air groove 7 has a height of 50-70 mm, a width of 5-10 mm, and a depth of 5-10 mm.

[0025] During casting, argon enters the outer annular gas channel 3 from the gas inlet pipe 2, and then enters the middle channel of the bowl 12 through the uniformly distributed gas grooves 4, forming the first radial gas seal. At the same time, argon enters the inner annular gas groove 5 from the outer annular gas channel 3 through the inner and outer gas groove channels 6 to form the second radial argon gas blockage. In addition, argon enters the axially descending gas groove 7 through the inner annular gas groove 5 to form an axial argon gas blockage in the bowl and diffuse downward.

[0026] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel long shroud structure, comprising a body, wherein a hollow channel is arranged in the body, wherein the upper end of the hollow channel is a bowl, and wherein: An air inlet pipe is arranged on one side of the bowl, the air inlet pipe is communicated with an outer annular air channel, the outer annular air channel is communicated with a uniformly distributed air groove, an inner annular air groove is arranged in the bowl, and the inner annular air groove is communicated with the outer annular air channel.

2. The novel shroud structure according to claim 1 is characterized in that: The inner annular air groove is in communication with the outer annular air channel through a plurality of inner and outer air groove channels.

3. The novel shroud structure according to claim 2 is characterized in that: The inner and outer air groove channels are horizontally arranged along the radial direction of the bowl portion.

4. The novel shroud structure according to any one of claims 1 to 3, characterized in that: The lower part of the inner annular air groove is also connected to a plurality of axially descending air grooves, and the axially descending air grooves are arranged in the bowl part.

5. The novel shroud structure according to claim 1 is characterized in that: The outer annular air channel is arranged at the upper end of the body.

6. The novel shroud structure according to claim 1 is characterized in that: The evenly distributed air grooves are arranged at the top of the body.

7. The novel shroud structure according to claim 1 is characterized in that: The inner annular air groove is located in the middle of the bowl, and its height is 10-60mm from the upper edge of the water outlet.

8. The novel shroud structure according to claim 4 is characterized in that: The axially descending air groove has a height of 50-70 mm, a width of 5-10 mm, and a depth of 5-10 mm.

9. The novel shroud structure according to claim 2 is characterized in that: The number of the inner and outer air groove channels is ≥4.

10. The novel shroud structure according to claim 4, characterized in that: The number of the axially descending air grooves is ≥4.

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