CN219188610U

CN219188610U - Immersed nozzle

Info

Publication number: CN219188610U
Application number: CN202320367953.6U
Authority: CN
Inventors: 付忠清
Original assignee: Anshan Western Refractory Products Co ltd
Current assignee: Anshan Western Refractory Products Co ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-06-16
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses a submerged nozzle, which relates to the technical field of submerged nozzles and comprises a submerged nozzle body and a submerged nozzle bottom which are integrally formed, wherein a pair of side holes are symmetrically formed in the side wall of the submerged nozzle body and correspond to the position higher than the bottom of the submerged nozzle, a middle cavity of the submerged nozzle body is an inner hole, at least one ring of check baffle ring is arranged in the center of the inner wall of the inner hole, and the upper surface of the check baffle ring is an inwards inclined surface; the bottom of the submerged nozzle is provided with a cone, and the highest point of the cone is lower than the lowest point of the side hole; according to the utility model, the grid baffle ring with the inclined plane and the cone arranged at the bottom of the submerged nozzle are arranged on the inner wall of the inner hole of the submerged nozzle body to buffer molten steel in the submerged nozzle body, so that the impact depth of injection flow is reduced, the turning of a crystallizer is reduced, and the high temperature of the liquid level of the crystallizer is further maintained.

Description

Immersed nozzle

Technical Field

The utility model relates to the technical field of submerged entry nozzle, in particular to a submerged entry nozzle.

Background

A submerged nozzle (submerged nozzle) is a refractory sleeve for pouring which is installed at the bottom of a tundish and inserted below the level of molten steel in a mold in a continuous casting apparatus. The main function of the submerged entry nozzle is to prevent secondary oxidation of the tundish injection and molten steel splashing.

Practice at home and abroad proves that the shape and the size of the submerged nozzle have direct influence on the quality of casting blanks. The skilled worker therefore strives to make improvements in the construction of the submerged entry nozzle in such a way that the depth of impact of the injection flow is reduced as much as possible, so that no strong tumbling of the mould level is caused and the high temperature of the mould level is maintained as much as possible. The existing submerged nozzle is more in a side hole type mode to buffer the submerged nozzle so as to reduce the impact depth of the injection flow and reduce the turning when molten steel is poured, but the mode of buffering so as to reduce the impact depth of the injection flow still does not reach the optimal state, and still has a lifting space.

Disclosure of Invention

According to the submerged nozzle, the grid baffle ring with the inclined plane and the cone arranged at the bottom of the submerged nozzle are arranged on the inner wall of the inner hole of the submerged nozzle body to buffer molten steel in the submerged nozzle body, so that the impact depth of injection flow is reduced, the turning of a crystallizer is reduced, and the high temperature of the liquid level of the crystallizer is further maintained.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the submerged nozzle comprises a submerged nozzle body and a submerged nozzle bottom which are integrally formed, wherein a pair of side holes are symmetrically formed in the side wall of the submerged nozzle body and correspond to the position higher than the bottom of the submerged nozzle, a middle cavity of the submerged nozzle body is an inner hole, at least one ring of check baffle ring is arranged in the center of the inner wall of the inner hole, and the upper surface of the check baffle ring is an inward inclined surface; the bottom of the submerged nozzle is provided with a cone, and the highest point of the cone is lower than the lowest point of the side hole.

Preferably, the side hole is an inclined hole inclined obliquely downward toward the outside of the submerged nozzle body.

Preferably, 2-4 circles of check rings are uniformly arranged at the center of the inner wall of the inner hole.

Preferably, the grid baffle ring and the submerged nozzle body are integrally formed.

Preferably, a convex ring is arranged at the lower end of the inner side wall of the inner hole of the submerged nozzle body.

Preferably, the cone is integrally formed with the bottom of the submerged nozzle.

The utility model provides a submerged nozzle, which has the following beneficial effects:

1. according to the utility model, the grid baffle ring with the inclined plane and the cone arranged at the bottom of the submerged nozzle are arranged on the inner wall of the inner hole of the submerged nozzle body to buffer molten steel in the submerged nozzle body, so that the impact depth of injection flow is reduced, the turning of a crystallizer is reduced, and the high temperature of the liquid level of the crystallizer is further maintained;

2. the side hole is an inclined hole which is inclined downwards towards the outside of the submerged nozzle body, so that molten steel is impacted downwards obliquely when flowing out of the side hole, and the resistance is increased, so that the turning is reduced; the check ring can set up the multiunit, and thereby the check ring is in the use, and wearing and tearing consumption is great, sets up the life that thereby promotes the immersion nozzle.

Drawings

Fig. 1 is a front sectional view of a submerged nozzle according to the present utility model.

Fig. 2 is a top view of a submerged entry nozzle according to the present utility model.

Fig. 3 is a schematic view of the operation of a submerged nozzle according to the present utility model.

In the figure: 1. a submerged entry nozzle body; 2. the bottom of the immersion nozzle; 3. a cone; 4. a protruding ring; 5. a side hole; 6. an inclined hole; 7. an inner bore; 8. and a check ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-3, the submerged nozzle comprises a submerged nozzle body 1 and a submerged nozzle bottom 2 which are integrally formed, a pair of side holes 5 are symmetrically formed in the side wall of the submerged nozzle body 1 and correspond to the position higher than the submerged nozzle bottom 2, a cavity in the submerged nozzle body 1 is an inner hole 7, at least one ring of check baffle ring 8 is arranged in the center of the inner wall of the inner hole 7, and the upper surface of the check baffle ring 8 is an inward inclined surface; the bottom 2 of the submerged nozzle is provided with a cone 3, and the highest point of the cone 3 is lower than the lowest point of the side hole 5; the side hole 5 is an inclined hole 6, and the inclined hole 6 is inclined downwards towards the outside of the submerged nozzle body 1; 2-4 rings of check rings 8 are uniformly arranged in the center of the inner wall of the inner hole 7; the grid baffle ring 8 and the submerged nozzle body 1 are integrally formed; the lower end of the inner side wall of the inner hole 7 of the submerged nozzle body 1 is provided with a convex ring 4; the cone 3 and the bottom 2 of the submerged nozzle are integrally formed.

The detailed connection means are known in the art, and the following mainly introduces the working principle and process, specifically as follows:

according to the description, as shown in figures 1-3, the immersion nozzle body 1 and the immersion nozzle bottom 2 are manufactured by integral molding, and commonly used materials are fused quartz and Al2O 3-C, so that the molten steel loss resistance is good, the slag erosion resistance is strong and the thermal shock resistance is good; the bottom of the side wall of the submerged nozzle body 1 is provided with a pair of symmetrical side holes 5, molten steel flows in from an inner hole 7 of the submerged nozzle body 1 and flows out from the side holes 5 into molten steel of the crystallizer; because the center of the inner wall of the inner hole 7 is at least provided with one ring of check baffle ring 8, the upper surface of the check baffle ring 8 is an inwards inclined surface, and the angle of inclination is optimally 45 degrees, molten steel at the edge of the inner hole 7 impacts the inclined surface of the check baffle ring 8 when falling down, the flow direction of the molten steel changes from vertical downward to horizontal inward as shown in A in fig. 3, and the center of the inner hole 7 is not directly influenced by the check baffle ring 8, but the falling molten steel impacts the molten steel which is influenced by the check baffle ring 8 and is horizontally inwards, so that the molten steel at the center of the inner hole 7 is buffered and decelerated to a certain extent; the molten steel buffered by the primary deceleration continuously falls down to the bottom 2 of the submerged nozzle, and as the bottom 2 of the submerged nozzle is provided with the cone 3, the side surface of the cone 3 is inclined, and the angle of 45 degrees is optimal, as in the position B in fig. 3, the falling molten steel is influenced by the inclined surface of the cone 3, is turned again and impacted to the side wall of the inner hole 7 of the submerged nozzle body 1, the speed is reduced again, and the accumulated molten steel flows out from the side hole 5; the molten steel in the submerged nozzle body 1 is buffered and decelerated through the grid baffle ring 8 with the inclined surface and the cone 3 arranged at the bottom 2 of the submerged nozzle, so that the impact depth of the injection flow is reduced, the turning of the crystallizer is reduced, and the high temperature of the liquid level of the crystallizer is further maintained.

In one possible implementation, the pair of side holes 5 are inclined holes 6, the inclined holes 6 incline downwards towards the outside of the submerged nozzle body 1, as shown in fig. 3C, the path of molten steel flowing out of the inclined holes 6 is towards the deep part of the crystallizer, so that greater resistance is generated to the injected flow, the impact depth of the injected flow is reduced, the turning of the crystallizer is reduced, and the high temperature of the liquid level of the crystallizer is maintained.

In the utility model, the number of the check rings 8 uniformly arranged at the center of the inner wall of the inner hole 7 is 2-4 circles, the abrasion consumption of the check rings 8 is larger in the use process, and a plurality of groups of check rings are arranged so as to prolong the service life of the submerged nozzle; the lower end of the inner side wall of the inner hole 7 of the submerged nozzle body 1 is provided with a convex ring 4 in a circle, namely, the resistance can be carried out on the molten steel turned by the cone 3, and the service life of the submerged nozzle body 1 is prolonged; the check baffle ring 8 and the immersion nozzle body 1 are integrally formed, the cone 3 and the immersion nozzle bottom 2 are integrally formed, the integral forming reduces the installation difficulty, and in addition, the stability of the cone 3 and the check baffle ring 8 in the immersion nozzle can be improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The submerged nozzle is characterized by comprising a submerged nozzle body (1) and a submerged nozzle bottom (2) which are integrally formed, wherein a pair of side holes (5) are symmetrically formed in the side wall of the submerged nozzle body (1) and correspond to positions higher than the submerged nozzle bottom (2), a middle cavity of the submerged nozzle body (1) is an inner hole (7), at least one ring of check baffle ring (8) is arranged in the center of the inner wall of the inner hole (7), and the upper surface of the check baffle ring (8) is an inward inclined surface; the bottom (2) of the submerged nozzle is provided with a cone (3), and the highest point of the cone (3) is lower than the lowest point of the side hole (5).

2. A submerged entry nozzle according to claim 1, characterized in that the side holes (5) are inclined holes (6), the inclined holes (6) being inclined obliquely downwards towards the outside of the submerged entry nozzle body (1).

3. A submerged entry nozzle according to claim 1 or 2, wherein 2-4 grid baffle rings (8) are evenly arranged in the centre of the inner wall of the inner bore (7).

4. A submerged entry nozzle according to claim 3, characterised in that the grid ring (8) is integrally formed with the submerged entry nozzle body (1).

5. A submerged entry nozzle according to claim 1 or 2, wherein the lower end of the inner side wall of the inner bore (7) of the submerged entry nozzle body (1) is provided with a protruding ring (4).

6. A submerged entry nozzle according to claim 5, characterised in that the cone (3) is integrally formed with the submerged entry nozzle bottom (2).