KR20130131990A - Apparatus for adjusting the centering of nozzle and method for adjusting the centering of nozzle - Google Patents

Abstract

The present invention relates to a device for adjusting a centering of a nozzle where a first and a second outlet, which are faced each other, are prepared. The nozzle centering adjusting device comprises: a centering adjusting part for radiating a light to the second outlet since a part is inserted into an inside of the first outlet; and a centering detecting part, which is arranged to face the second outlet in an outside of a nozzle, for figuring out whether a centering of the nozzle or not by detecting a light radiated from the centering adjusting part. Therefore, according to an embodiment of the present invention, the nozzle, which is prepared in the first and the second outlet arranged to face each other, figures out a centering of the nozzle by detecting a light in the centering detecting part, which is arranged to face the second outlet in outside of the nozzle, when the centering adjusting part, which is inserted into an inside of the first outlet, radiates a light toward the second outlet. Thus, the centering of the nozzle can be judged accurately. Moreover, in the centering adjusting part, a part of a main body is inserted into an inside of the first outlet, and a knob connected to the main body is installed to protrude toward an outside. Thus, a centering adjusting of the nozzle is facilitated since a user can adjust a centering of the nozzle while the user moves the nozzle with the knob of the centering adjusting part as the user figures out a centering state of the nozzle since the centering adjusting part radiates a light.

Description

Apparatus for adjusting the centering of nozzle and Method for adjusting the centering of nozzle}

The present invention relates to a nozzle centering adjusting device and a nozzle centering adjusting method using the same. More particularly, the present invention relates to a nozzle centering adjusting device for accurately detecting a centering state of a nozzle and to easily adjust the centering of a nozzle, and a nozzle centering adjusting method using the same. It is about.

Generally, in the continuous casting work process, molten steel is supplied from a ladle for transporting molten steel, and the molten steel is injected into a tundish and stored in a predetermined amount. Thereafter, the molten steel injected from the tundish is injected through a nozzle, ) To prepare a solid cast slab.

Conventional immersion nozzles, one end is coupled to the tundish, the other end is immersed in the mold, it is necessary to center the nozzle when assembling such immersion nozzles in the tundish. At this time, the centering of the nozzle is not made precisely because the centering is controlled by the operator's naked eye and the sense of working practices. When the centering of the nozzle is distorted, that is, when the nozzle is biased to either side, the drift phenomenon due to the flow of the melt surface in the mold is intensified, and the vortex phenomenon occurs and the molten steel is unevenly solidified, which adversely affects the cast quality.

In order to solve this problem, an immersion nozzle centering apparatus using a laser is provided. Brief description of the centering method of the immersion nozzle centering apparatus using a conventional laser is as follows. First, in order to accurately center the immersion nozzle inserted into the mold in the process of setting the tundish on the upper part of the mold, a ruler is attached to the inner surface of the opposite side of the mold facing the laser generator with the laser generator attached to the short side of the mold. Let's do it. When the laser generator and the ruler are attached to the mold and irradiated with the laser beam, the irradiated laser beam passes through the discharge port of the immersion nozzle and the outer circumference of the immersion nozzle and is displayed on the ruler. By determining the shape, it is determined whether the position of the discharge port is exactly positioned toward the center of the width of both short sides of the mold. However, such an immersion nozzle centering apparatus has to recognize and recognize the shape of the laser beam formed on the ruler when the nozzle is not centered, that is, when the discharge port is biased to one side, and moves the tundish directly. Since the centering state of the nozzle cannot be accurately detected, the centering adjustment is difficult.

On the other hand, Korean Patent Publication No. 2009-0123610 is attached to one side of the inner surface of the mold and one passes through the discharge port of the immersion nozzle is charged in the mold and the other one passes through the outer peripheral edge of the immersion nozzle spaced apart from the discharge port Disclosed is an immersion nozzle centering apparatus including a laser generator to be irradiated and a display member attached to the other side of the laser generator to identify the position of the laser beam and display the centering position of the discharge port.

Korean Patent Publication No. 2009-0123610

An object of the present invention is to provide a nozzle centering adjustment device and a nozzle centering adjustment method using the same, which accurately detects a centering state of a nozzle and easily adjusts a centering of a nozzle.

Another technical problem of the present invention is to provide a nozzle centering adjusting device for adjusting the centering using light and a nozzle centering adjusting method using the same.

The apparatus for adjusting a nozzle centering according to the present invention includes a centering adjusting part for inserting light into the first discharge port, a part of which is inserted into the nozzle having the first and second discharge ports disposed to face each other, and emitting the light toward the second discharge hole. And a centering detector disposed at the outside of the nozzle to face the second outlet and detecting whether the nozzle is centered by sensing the light emitted from the centering controller.

The centering control part includes a main body installed with a lamp for emitting light, and a part installed to be inserted into the first discharge port and a handle installed to be connected to the main body from the outside of the nozzle.

The centering detection unit is disposed to face the second discharge port outside the nozzle, and includes a centering sensor that detects a position of light emitted from the centering control unit.

The centering detection unit is disposed to face the second discharge port outside the nozzle, and includes a centering reference table on which the centering sensor is mounted.

The centering sensor is a detection unit for detecting the position of the light spot irradiated from the centering control unit irradiated from the centering control unit and the comparison / determination unit for determining the centering state of the nozzle by comparing the position and the reference position of the light spot Include.

And a centering confirmation lamp connected to the centering sensor and receiving a determination whether the nozzle is centered from the centering sensor and indicating a centering state.

In the adjusting method of the nozzle centering adjusting device according to the present invention, a process of radiating light into a first discharge hole provided in a nozzle, and sensing a position of irradiated light outside the second discharge hole provided in the nozzle so as to face the first discharge hole. And determining the centering state of the nozzle.

The determining of the centering state of the nozzle may include determining whether the light spot is positioned on the reference position by comparing the position of the light spot with the reference position.

The nozzle is moved when the centering of the nozzle is out of the reference position.

In the nozzle centering adjusting device according to the embodiments of the present invention, when the centering adjusting part inserted into the first discharge hole emits light toward the second discharge hole in the nozzles provided with the first and second discharge ports disposed to face each other, the outside of the nozzle In the centering detection unit disposed opposite to the second discharge port to detect the light to determine whether the centering of the nozzle. Therefore, compared to the case where the conventional operator adjusts the nozzle centering with the naked eye and when adjusting the nozzle centering using a laser, it is possible to accurately determine the centering of the nozzle.

In addition, the centering adjustment part is installed so that a part of the main body is inserted into the first discharge port, and the handle connected to the main body protrudes to the outside. The centering sensor detects the centering state of the nozzle by emitting light to the centering detection unit, and the operator can adjust the centering of the nozzle while moving the nozzle with the handle of the centering control unit. Therefore, there is an advantage that the centering adjustment of the nozzle is easy.

1 is a schematic view schematically showing a general continuous casting apparatus;
2 is a view showing whether or not the center of the nozzle
3 is a view illustrating a coupling state of a sensor ring and a sensor holder;
Figure 4 is a side view showing a nozzle mounted with a nozzle centering adjustment device according to an embodiment and a transport cart equipped with a nozzle
5 is a front view showing a nozzle equipped with a nozzle centering adjustment device according to an embodiment and a transport cart equipped with a nozzle;
6 is a sectional view showing a nozzle equipped with a nozzle centering adjustment device according to an embodiment;
7 is a view showing an example of the light spot irradiated to the centering reference band according to the embodiment
8 is a flowchart illustrating a method of centering a nozzle

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a general continuous casting apparatus; FIG.

Referring to FIG. 1, a general continuous casting apparatus includes a ladle 100 for transporting molten steel, a tundish 200 for temporarily receiving molten steel from the ladle 100, and a tundish 200. The mold 300 and one end of the molten steel to solidify it are connected to the lower portion of the tundish 200 and the other end is inserted into the mold 300 to supply the molten steel in the tundish 200 to the mold 300. And a nozzle 400, for example, an immersion nozzle.

Conventional nozzle 400 has a cylindrical shape extending in the longitudinal direction, the upper side is opened, the lower side has a closed shape. In addition, the nozzle 400 is formed with a discharge port through which molten steel is discharged at points symmetrical with each other on both side walls of the lower region. In the following description, the discharge holes formed on one side of the discharge ports on both sides will be referred to as 'first discharge holes', and the discharge holes formed on the other side will be referred to as 'second discharge holes'.

2 is a diagram illustrating whether the nozzle is centered.

Referring to FIG. 2, the nozzle 400 is inserted into the mold 300, and it is possible to know whether the nozzle 400 is centered through the position of the nozzle 400 discharge port.

The mold 300 has an inner space, and the cross section is formed in a rectangular shape. Here, the relatively long side of the mold 300 is called a long side, and the relatively short side is called a short side. However, the shape of the mold 300 is not limited thereto and may be modified into various shapes having a space in which the nozzle 400 may be inserted.

As shown in FIG. 2A, when the imaginary line connecting the center of the first discharge port of the nozzle 400 and the center of the second discharge port in the horizontal direction is called an extension line, the extension line is the mold 300. When it is horizontal with the long side of, the nozzle 400 is said to be 'centered'. As shown in (b) of FIG. 2, when the imaginary line connecting the center of the first discharge port of the nozzle 400 and the center of the second discharge port in a horizontal direction is called an extension line, the extension line is a mold ( If it is not horizontal with the long side of 300, it is determined that the centering of the nozzle 400 is not normal.

3 is a view illustrating a coupling state of the sensor ring and the sensor holder.

Referring to FIG. 3, in general, in order for the nozzle 400 to be mounted on the tundish 200, a sen ring 910 for fixing the neck of the nozzle 400 may include a sen holder of the tundish 200. sen holder).

The sensor ring 910 is formed in a hollow shape so that the nozzle 400 can be inserted therein, and the cross-section may be formed in various shapes such as a circle, a semicircle, an ellipse, and a polygon. In addition, the sensing ring 910 includes a plurality of protrusions for allowing the sensing ring 910 into which the nozzle 400 is inserted to be coupled to the sensing holder 210.

The sensor holder 210 has a shape in which the top, bottom, and side portions are opened, and a cross section thereof is, for example, a 'c' shape of a Korean consonant. In addition, the sensor holder 210 includes a plurality of holes to be coupled to the plurality of protrusions included in the sensor ring 910 so that the sensor ring 910 may be seated.

When the imaginary line connecting the center of the first discharge port of the nozzle 400 and the center of the second discharge port in a horizontal direction is called an extension line, the nozzle 400 is centered when the extension line is horizontal with the long side of the mold 300. Judging by the state. At this time, the cart 900 is raised to couple the protrusion of the sen ring 910 into which the nozzle 400 is inserted and the hole of the sen holder 210 connected to the tundish 200. Centering is completed when the sensing ring 910 is seated on the sensing holder 210.

Figure 4 is a side view showing a nozzle mounted with a nozzle centering adjustment device according to an embodiment and a transport cart equipped with a nozzle. 5 is a front view showing a nozzle equipped with a nozzle centering adjustment device according to the embodiment and a transport cart equipped with nozzles.

4 and 5, the nozzle 400 centering adjustment device detects the centering control unit 500 and the light emitted from the centering control unit 500 to emit light, and the centering detection unit to determine the state of the centering. And 600.

The centering control unit 500 emits light to detect the state of the centering, and the operator adjusts the centering of the nozzle 400 according to the state of the centering. A part is inserted into the first discharge port, and the other part. Is installed to protrude to the outside of the nozzle. The centering control unit 500 has an inner space, the main body 510 is installed so that a part of the centering control unit 500 is inserted into the first discharge port, and the lamp 530 and the nozzle (inserted into the main body 510 to emit light) It is installed on the outside of the 400 includes a handle 520 connected to the main body 510.

One side wall of the main body inserted into the first discharge port is provided with a means for passing the light emitted from the lamp 530, the means may be an opening or a transmission window.

The lamp 530 is a means for emitting light. When the means for allowing the emitted light to pass through is an opening, the lamp 530 is provided at a position corresponding to the opening in the inner space of the main body 510. Is positioned in the nozzle 400 to correspond to the second discharge port. In addition, when the means through which the emitted light can pass is the transmission window, the lamp 530 is provided in a position corresponding to the transmission window in the internal space of the main body 510, the transmission window in the nozzle 400 It is located so as to correspond to the second discharge port.

In the exemplary embodiment, a lamp 530 for emitting a laser is used, but the present invention is not limited thereto, and means for emitting various lights may be used.

The handle 520 protrudes outside the nozzle 400 and is connected to the main body 510. When centering the nozzle 400, the operator adjusts the handle 520 in the left and right horizontal direction to adjust the centering.

The centering detection unit 600 is radiated from the centering reference stage 620 and the lamp 530 of the centering control unit 500 disposed to face the second discharge port outside the nozzle 400 and the centering reference stage 620. A centering sensor 610 that detects the position of the light irradiated to the center and determines the centering state, and a centering confirmation lamp that is connected to the centering sensor 610 and receives the centering of the nozzle 400 from the centering sensor 610 and displays the centering state 640 and the sensor moving member 630 for moving the centering reference stage 620 left and right.

The centering reference stage 620 according to the embodiment has a plate shape extending in the longitudinal direction and is disposed to face the second discharge port. However, the shape of the centering reference stage 620 is not limited thereto and may be manufactured in various shapes.

The centering sensor 610 is installed at a position facing the second discharge port in the area of the centering reference base 620, and is installed to partially expose the centering reference base 620. The centering control unit 500 detects the light emitted and serves to determine whether to center. Hereinafter, the position of the centering sensor 610 mounted on the centering reference stage 620 will be referred to as a 'reference position'.

In the centering, the centering reference base 620 is disposed at a position where the nozzle 400 is centered in the mold 300. For example, when an imaginary line connecting the center of the first discharge port of the nozzle 400 and the center of the second discharge port in a horizontal direction is called an extension line, the position and centering criterion of the extension line parallel to the long side of the mold 300 The centering reference stage 620 is installed at a position where the reference position on the base 620 is aligned in a straight line. From this, when the following centering process using the centering reference stage 620 is completed and the nozzle is mounted in the tundish, the nozzle is centered in place even in the mold.

In addition, the area irradiated with the light emitted from the centering control unit 500 to the centering reference stage 620 is called a 'light spot'.

Although not shown, the centering sensor 610 detects the position of the light spot, and a comparison / determination unit (not shown) for determining whether the center is compared by comparing the reference position with the position of the light spot. It includes.

The centering confirmation lamp 640 is connected to the centering sensor 610 and receives the determination whether the nozzle 400 is centered from the centering sensor 610 to display the red lamp and the blue lamp.

The sensor moving member 630 may be connected to one end of the centering reference stage 620 and horizontally move the centering reference stage 620 to adjust the distance. The sensor moving member 630 may be, for example, a sliding rail, and is not limited thereto. Any means for moving the centering reference stage 620 may be used.

The transport cart 900 is generally used to transport the nozzle 400 in a continuous casting process, the shape of which is similar to a conventional transport cart, and will be described briefly.

The transport cart 900 has a flat board, a support 930 extending vertically to one surface of the board and supporting the sen ring seat 920, and one end thereof so that the sen ring 910 may be seated. Sen ring seat 920 connected to the support 930 and the other end is connected to the ring 910, and formed in a hollow shape so that the nozzle 400 can be inserted, one end of the ring ring seat 920 The ring is connected to the sen ring 910, which serves to fix the neck of the nozzle 400, and the lower end of the support 930 is connected to the board and disposed so as to face the sen ring 910 to the nozzle 400 A nozzle support 940 serving to support, a handle 960, one end of which is connected to the board and parallel to the support 930, and a plurality of carts 900 which are located at the bottom of the board to move the cart 900 Wheel 950.

6 is a cross-sectional view showing a nozzle equipped with a nozzle centering adjusting device according to an embodiment. 7 is a diagram illustrating an example of a light spot irradiated to the centering reference band according to the embodiment.

6 and 7, when light is emitted from the lamp 530 of the centering control part 500 mounted at the first discharge port of the nozzle, the light is irradiated to the centering reference stage 620 after passing through the second discharge port.

In this case, as shown in FIG. 7A, when the light spot irradiated to the centering reference stage 620 is located on the reference position, centering is performed at the comparison / determination unit (not shown) of the centering sensor 610. It is determined that this is normal and transmits the information to the centering confirmation lamp (640). When the centering confirmation lamp 640 receives the information indicating that the centering is turned on, the blue lamp is turned on. As shown in FIG. 7B, when the light spot irradiated to the centering reference stage 620 is not located on the reference position, it is determined that the centering is not performed and the information on the centering confirmation lamp 640 is determined. Send it. When the centering confirmation lamp 640 receives the information indicating that the centering is not performed, the red lamp is turned on. At this time, while adjusting the centering, the operator moves the handle of the centering control part 500 to the left and right, and adjusts the centering check lamp 640 until the blue lamp is turned on.

Hereinafter, the method for centering a nozzle according to the present invention having the configuration as described above with reference to FIGS. 1 to 8 will be described in detail.

8 is a flowchart illustrating a method of centering a nozzle.

First, before assembling the nozzle 400 to the tundish 200, the ring 910 is placed on the transport cart 900, the nozzle 400 is transported to the nozzle support 940, and then the ring 910 To the neck of the nozzle 400 is seated on the seat ring seat 920 of the transport cart 900 and the cart 900 is raised to raise the nozzle 400 together. Thereafter, the centering control unit 500 is inserted into the first discharge port of the nozzle 400, and the centering control unit 500 emits light toward the centering reference stage 620 to check the centering (S10). As shown in (a) of FIG. 2, the centering state of the nozzle 400 is a virtual structure in which the center of the first discharge port of the nozzle 400 and the center of the second discharge port are horizontally connected in the mold 300. When the line is called an extension line, it is said that the nozzle 400 is centered when the extension line is horizontal with the long side of the mold 300. The centering reference stage 620 is disposed at a position where the nozzle 400 is centered in the mold 300. In order to determine whether the nozzle 400 is centered, the sensing unit (not shown) of the centering sensor 610 determines whether the light spot irradiated to the centering reference stage 620 is located on the reference position (S11). At this time, when the light spot is located on the reference position as shown in (a) of FIG. 7, the comparison / determination unit (not shown) of the centering sensor 610 determines that the centering is normal, and the centering confirmation lamp 640 Communicate information When the centering confirmation lamp 640 receives the information indicating that the centering is turned on, the blue lamp is turned on (S12). When the blue lamp is turned on, the operator determines that the centering of the nozzle 400 is normal, and separates the nozzle 400 from the transport cart 900 and seats the nozzle 400 on the strong holder of the tundish 200. Let's do it. When the plurality of protrusions included in the sensor ring 910 is coupled to the holes of the sensor holder 210 and the nozzle 400 is seated on the sensor holder 210, the nozzle is centered in the mold in the mold. .

However, as shown in FIG. 2B, when the imaginary line connecting the center of the first discharge port of the nozzle 400 and the center of the second discharge port in a horizontal direction is called an extension line, the extension line is formed by a mold ( If it is not horizontal with the long side of 300, it is determined that the centering of the nozzle 400 is not normal. If the position of the light spot irradiated to the centering reference stage 620 by the sensing unit (not shown) of the centering sensor 610 to determine whether the nozzle 400 is centered, and (b) of FIG. When the light spot irradiated to the centering reference stage 620 is not positioned on the reference position, it is determined that the centering is not performed at the comparison / determination unit (not shown) of the centering sensor 610, and the centering confirmation lamp ( 640). When the centering check lamp 640 receives the information indicating that the centering is not performed, the red lamp is turned on (S13). At this time, the operator adjusts the centering of the nozzle 400 while moving the handle 520 of the centering adjustment unit 500 to the left and right, and adjusts until the blue lamp is turned on the centering confirmation lamp 640 (S14).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the following claims.

500: centering adjustment unit 510: main body
520: handle 600: centering detection unit
610: centering sensor 620: centering reference
630: sensor moving member 640: centering confirmation lamp

Claims (9)

In the apparatus for adjusting the centering of the nozzles provided with the first and second discharge ports arranged mutually opposite,
A centering adjusting part inserted into a part of the first discharge hole to emit light toward the second discharge hole; And
And a centering detection unit disposed to face the second discharge port outside the nozzle and determining whether the nozzle is centered by sensing light emitted from the centering control unit. The method according to claim 1,
The centering control unit is a nozzle centering adjustment apparatus is provided with a lamp for emitting light therein, the body is installed so that a part is inserted into the first discharge port and the handle is installed to be connected to the main body from the outside of the nozzle. The method according to claim 1,
And a centering sensor disposed at the outside of the nozzle to face the second discharge port, the centering sensor sensing a position of light emitted from the centering control part. The method according to claim 3,
The centering sensor is disposed so as to face the second discharge port from the outside of the nozzle, the nozzle centering adjustment device including a centering reference base on which the centering sensor is mounted. The method according to claim 3,
The centering sensor is a detection unit for detecting the position of the light spot irradiated from the centering control unit irradiated from the centering control unit and the comparison / determination unit for determining the centering state of the nozzle by comparing the position and the reference position of the light spot Nozzle centering adjustment device comprising. The method according to claim 3,
And a centering confirmation lamp connected to the centering sensor and receiving a determination whether the nozzle is centered from the centering sensor to display a centering state. Radiating light into the first discharge hole provided in the nozzle;
And determining a centering state of the nozzle by sensing a position of irradiated light outside the second discharge hole provided in the nozzle so as to face the first discharge hole. The method of claim 7,
The determining of the centering state of the nozzle comprises comparing the position of the light spot and the reference position to determine whether the light spot is located on the reference position. The method according to claim 8,
And adjusting the nozzle when the centering of the nozzle is out of the reference position.

Images