CN210848317U

CN210848317U - Side-hole asymmetric submerged five-hole water gap for rectangular large square billet

Info

Publication number: CN210848317U
Application number: CN201921650551.7U
Authority: CN
Inventors: 唐海燕; 王璞; 张硕; 刘锦文; 胡群; 陈希青; 张家泉
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-26
Anticipated expiration: 2029-09-30

Abstract

The utility model belongs to the technical field of continuous casting, concretely relates to five hole mouths of a river of asymmetric immersion of side opening for rectangle bloom, it includes the main part, the top of main part is equipped with the feed liquor hole, the main part lower extreme is equipped with 5 and goes out the liquid hole, 4 side openings along the circumferencial direction equidistance of main part distributes, and wherein 2 are for going out the liquid hole, and 2 go out the liquid hole down, and go up and go out the liquid hole and exist the difference in height down between the liquid hole, and another goes out the liquid hole setting and is in the bottom of main part. The beneficial effects of the utility model are that, because go up out the liquid hole and go out the asymmetry of liquid hole height down, make the wide and narrow face side hole intensity inconsistent that effluences, and then improve the homogeneity of initial set base shell. The flow velocity difference at different positions of the meniscus is reduced, and vortex slag entrapment at the meniscus is reduced or prevented, so that the surface quality of the casting blank is improved. The diameter of the bottom hole is increased, so that the water gap blockage is reduced, and the production is smooth.

Description

Side-hole asymmetric submerged five-hole water gap for rectangular large square billet

The technical field is as follows:

the utility model belongs to the technical field of continuous casting, concretely relates to five hole mouths of side opening asymmetric immersion for rectangle bloom.

Background art:

in the current rectangular bloom continuous casting process, a common straight-through water gap is adopted to cause the jet impact depth to be too deep, so that the floating removal of impurities is not facilitated; the liquid level is too calm, which is not beneficial to the melting of the casting powder; the impact action of high-temperature molten steel and a crystallizer is weak, overheating dissipation is not facilitated, columnar crystals are developed, the quality of a casting blank is unstable, and the like; the small aperture of the bottom hole is easy to cause the water gap blockage, which is not favorable for the casting blank quality and the smooth production.

Disclosure of Invention

The technical scheme of the invention discloses a side-hole asymmetric submerged five-hole water gap for a rectangular bloom, which is used for solving any one of the above and other potential problems in the prior art.

In order to achieve the purpose, the technical scheme of the invention discloses a side-hole asymmetric submerged five-hole water gap for a rectangular bloom, which comprises a main body, wherein a liquid inlet hole is formed in the top end of the main body, 5 liquid outlet holes are formed in the lower end of the main body, 4 side holes are distributed in the circumferential direction of the main body at equal intervals, 2 liquid outlet holes are formed in the upper side hole and the lower side hole, a height difference exists between the upper liquid outlet hole and the lower liquid outlet hole, and the other liquid outlet hole is formed in the bottom of the main body.

Further, 2 upper side holes face the wide surface of the crystallizer; 2 of said lower side holes are directed against the narrow face of the crystallizer.

Further, the height difference between the horizontal center lines of the symmetrical 2 upper side holes and the symmetrical 2 lower side holes is 5-10 mm.

Furthermore, 2 go up the side opening and 2 the cross-section of side opening is the rectangle down, and four angles of rectangle are the fillet.

Further, the sectional areas of the 2 upper side holes and the 2 lower side holes are equal.

Furthermore, the cross section of the bottom hole is circular, and the cross section area of the bottom hole is 0.5 times of the sum of the cross sections of the 2 upper side holes and the 2 lower side holes.

Further, the section of the liquid inlet is circular.

Further, the sectional area of the liquid inlet is 4 times of that of the bottom hole.

Furthermore, the cylindrical main body is made of refractory materials.

The utility model has the advantages that: due to the adoption of the technical scheme, the utility model discloses a porous mouth of a river side opening difference in height that the big square billet of adjustment rectangle used, the homogeneity of the growth of proper even casting blank wide and narrow face blank shell, stable meniscus flow state, the production that prevents the curling slag phenomenon. The diameter of the bottom hole is increased, so that the water gap blockage is reduced, and the production is smooth. The matching of a plurality of holes can effectively improve the isometric crystal rate of the center of the casting blank and reduce the content of inclusions on the surface of the casting blank, thereby improving the quality of the casting blank.

Description of the drawings:

fig. 1 is the structural schematic diagram of the side-hole asymmetric immersion type five-hole nozzle for rectangular bloom of the present invention.

Fig. 2 is the structural schematic diagram of the asymmetric five-hole immersion nozzle with side holes of the present invention.

Fig. 3 is a cross-sectional view taken along the plane a-a of fig. 2.

In the figure:

1. the crystallizer comprises a main body, 2 parts of a liquid inlet hole, 3 parts of a liquid outlet hole, 4 parts of a flow channel, 5 parts of a liquid level, 6 parts of a crystallizer, 6-1 parts of a wide side of the crystallizer and 6-2 parts of a narrow side of the crystallizer.

The specific implementation mode is as follows:

specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments.

As shown in fig. 1, the embodiment of the present disclosure discloses a side-hole asymmetric submerged five-hole nozzle for a rectangular bloom, the side-hole asymmetric submerged five-hole nozzle for a rectangular bloom comprises a main body 1, the main body 1 is a cylindrical body, a flow channel 4 is arranged inside the main body 1, a liquid inlet hole 2 is arranged at the top end of the

main body

1, 5 liquid outlet holes 3 are arranged at the lower end of the main body, 4 side holes are equidistantly distributed along the circumferential direction of the main body 1, 2 of the side holes are upper liquid outlet holes 3-1 and 2 lower liquid outlet holes 3-2, a height difference exists between the upper liquid outlet hole 3-1 and the lower liquid outlet hole 3-2, and another liquid outlet hole 3 is a bottom hole which is arranged at the bottom of the main body 1; the height difference between the horizontal center lines of the symmetrical 2 upper side holes and the symmetrical 2 lower side holes is 5-10 mm; 2 upper side holes 3-1 face to the wide face 6-1 of the crystallizer; 2 lower side holes 3-2 are opposite to the narrow surface 6-2 of the crystallizer; the cross sections of the 2 upper side holes 3-1 and the 2 lower side holes 3-2 are rectangular, and four corners of the rectangle are rounded corners. The cross-sectional areas of the 2 upper holes 3-1 and the 2 lower holes 3-2 are equal. The cross sections of the bottom holes 3-3 are all circular, and the cross section area of the bottom holes 3-3 is 0.5 times of the sum of the cross sections of the 2 upper side holes 3-1 and the 2 lower side holes 3-2, as shown in fig. 3. The section of the liquid inlet 3-3 is circular. The sectional area of the liquid inlet 2 is 4 times of the sectional area of the bottom hole 3-3.

The cylindrical main body 1 is made of refractory materials.

The principle of the utility model is that: an upper side hole 3-1 and a lower side hole 3-2 with different heights are arranged on a main body 1 of the side hole asymmetric immersion type five-hole water gap for the rectangular bloom, and heat exchange between high-temperature molten steel and an initial solidified bloom shell is enhanced through side hole jet flow with different heights, so that overheating dissipation of the molten steel is promoted; the front edge of the side hole jet flow scouring solidification breaks the dendritic crystal, and broken crystal nuclei are brought into the crystallizer by the flowing of the molten steel;

and the bottom holes 3-3 prevent water gap blockage and reduce continuous casting pouring splashing by shunting the large-diameter bottom holes 3-3, thereby comprehensively improving the casting blank quality and ensuring smooth production.

Example (b):

as shown in FIG. 2, the side-port asymmetric submerged five-hole nozzle is installed on the center line of the crystallizer 6 by using a side-port asymmetric structure, and has a certain submerged depth from the liquid level 5. The lower hole 3-2 is arranged on the narrow surface 6-2 of the crystallizer, and the upper hole 3-1 is arranged opposite to the wide surface 6-1 of the crystallizer, so that the mounting design is beneficial to the uniformity of the solidified shell of the wide and narrow surfaces, the overheating dissipation of molten steel and the crushing of dendritic crystals at the solidification front, the flowing state of a meniscus can be stabilized, and the slag entrapment phenomenon can be prevented. The bottom holes 3-3 adopt a large-aperture design, so that the water gap blockage can be reduced, and the smooth production and the improvement of the casting blank quality are facilitated.

While several embodiments of the present invention have been presented herein, it will be appreciated by those skilled in the art that changes can be made to the embodiments herein without departing from the spirit of the invention. The above-described embodiments are merely exemplary and should not be taken as limiting the scope of the invention.

Claims

1. The side-hole asymmetric five-hole submerged nozzle for the rectangular bloom is characterized by comprising a main body, wherein a liquid inlet hole is formed in the top end of the main body, and 5 liquid outlet holes are formed in the lower end of the main body; 4 go out the liquid hole along the circumferencial direction equidistance of main part distributes, and wherein 2 are for going up out the liquid hole, go out the liquid hole under 2, and go up and go out the liquid hole and exist the difference in height down between the liquid hole, another liquid hole setting is in the bottom of main part.

2. The five-hole nozzle with the asymmetric side holes for the rectangular bloom as claimed in claim 1, wherein the height difference of the horizontal center line between the symmetric 2 upper liquid outlet holes and the symmetric 2 lower liquid outlet holes is 5-10 mm.

3. The five-hole nozzle with the side holes asymmetrically immersed for the rectangular bloom as claimed in claim 2, wherein 2 of said upper liquid outlet holes are opposite to the wide surface of the crystallizer; 2 liquid outlet holes face to the narrow face of the crystallizer.

4. The five-hole nozzle with the side holes asymmetrically immersed according to claim 2, wherein the cross-sections of the 2 upper liquid outlet holes and the 2 lower liquid outlet holes are rectangular, and the four corners of the rectangle are rounded.

5. The rectangular bloom nozzle with five asymmetric submerged holes of the side hole as claimed in claim 2, wherein the cross-sectional area of 2 said upper liquid outlet holes and the cross-sectional area of 2 said lower liquid outlet holes are equal.

6. The side-hole asymmetric five-hole submerged nozzle according to claim 1, wherein the cross-section of the liquid outlet holes of the bottom is circular, and the cross-sectional area of the liquid outlet holes of the bottom is 0.5 times the sum of the cross-sectional areas of the 2 upper liquid outlet holes and the 2 lower liquid outlet holes.

7. The rectangular bloom nozzle with five asymmetric submerged holes in side hole according to claim 1, wherein the cross section of the liquid inlet hole is circular.

8. The rectangular bloom side-hole asymmetric five-hole submerged nozzle as claimed in claim 1, wherein a sectional area of said liquid inlet hole is 4 times a sectional area of said liquid outlet hole of said bottom portion.

9. The side-hole asymmetric submerged nozzle of claim 2, wherein the cylindrical main body is made of refractory material.