KR101796087B1

KR101796087B1 - Apparatus for nozzle

Info

Publication number: KR101796087B1
Application number: KR1020150185011A
Authority: KR
Inventors: 김민철
Original assignee: 주식회사 포스코
Priority date: 2015-12-23
Filing date: 2015-12-23
Publication date: 2017-11-10
Also published as: KR20170075402A

Abstract

A plurality of nozzles extending in the machine direction in the thickness direction at a plurality of positions spaced apart from each other in the longitudinal direction, a plurality of nozzles extending in the longitudinal direction, There is provided a nozzle device capable of quickly and accurately replacing a plurality of nozzles at the time of replacing a nozzle for changing the discharge amount of a processed product.

Description

[0001] APPARATUS FOR NOZZLE [0002]

The present invention relates to a nozzle device, and more particularly, to a nozzle device capable of quickly and accurately replacing a plurality of nozzles at the time of replacing a nozzle for changing a discharge amount of a processed product.

Generally, in the continuous casting process of a steel mill, molten steel contained in a ladle is injected into a tundish, the molten steel injected into the tundish is continuously supplied to the mold, the molten steel is first cooled, And then casting.

As a facility for such a continuous casting process, there is a continuous casting facility. For example, Japanese Patent Laid-Open No. 2000-061620 discloses a tundish of a continuous casting facility.

On the other hand, if the amount of molten steel discharged during casting needs to be controlled by an open casting method in the continuous casting process of a steel mill, the metering nozzle in use at the bottom of the tundish can be replaced with a new metering nozzle having a desired inner diameter, Thereby controlling the discharge amount.

At this time, after the operator uses the jig to position the new metering nozzle next to the currently used metering nozzle, the new metering nozzle is pushed to the position of the currently used metering nozzle by using the hydraulic cylinder to remove the metering nozzle in use , Replacing the metering nozzle by mounting a new metering nozzle at the bottom of the tundish.

In the past, all the processes of the metering replacement work were manually performed by the operator. That is, since the nozzle replacement operation was performed manually by one operation, it was difficult to quickly replace the metering nozzle, There was a risk of exposure to high temperatures for long periods while staying in the facility.

JP 2000-061620 A

The present invention provides a nozzle device capable of quickly and accurately replacing a nozzle.

The present invention provides a nozzle device capable of precisely controlling the position of a nozzle upon replacement of the nozzle.

A nozzle device according to an embodiment of the present invention includes: a main body formed to extend in a longitudinal direction and disposed below a ladle of a container; A plurality of nozzles mounted through the body in a thickness direction at a plurality of longitudinally spaced positions; And a guide portion for movably guiding the main body in the longitudinal direction.

And an operation unit for supporting the main body movably in the longitudinal direction.

The main body has an upper surface facing a lug of the container, and a mounting hole may be formed by penetrating a plurality of positions of the upper surface in a thickness direction.

The spacing between the mounting holes may correspond to the width of the top surface of the nozzle.

The nozzle having a width in a longitudinal direction and a width direction and extending in a thickness direction; And a projection protruding from a lower surface of the nozzle body, and a discharge port may be formed through the center of the nozzle body and the projection in a thickness direction.

The nozzle body is supported on the upper surface of the main body, and the protrusion is inserted into the mounting hole of the main body so that the nozzle can be mounted on the main body.

The guide portion includes a guide member spaced apart from the body in the width direction and extending in the longitudinal direction; And a roller rotatably mounted on one side in the width direction of the main body and supported to be able to run on the guide member.

The actuating portion includes driving means disposed to be spaced apart from the body in the width direction; A first actuating member extending in the longitudinal direction and having a gear surface formed on the outer periphery thereof and rotatably mounted on the driving means; And a second actuating member mounted on the other side in the width direction of the main body so as to be rotatable about the central axis in the width direction and having a gear surface formed on the outer periphery thereof and coupled to the gear surface of the first actuating member .

The driving means may include a motor, the first actuating member may include a screw gear, and the second actuating member may include a helical gear.

An upper nozzle may be mounted on the ladle of the container, and one of the plurality of nozzles may be aligned on the lower side of the upper nozzle by the longitudinal movement of the main body, and may be closely attached to the lower surface of the upper nozzle.

According to the embodiment of the present invention, the apparatus can be configured so that a plurality of nozzles can be stored in the main body, the nozzle replacement process can be simplified, the nozzles can be easily replaced, and the nozzles can be quickly and accurately replaced.

Further, according to the embodiment of the present invention, the position of the nozzle can be precisely controlled at the time of replacing the nozzle by applying a gear operation method to the operation method for replacing the nozzle.

For example, in a case where the present invention is applied to a continuous casting process of a steelworks, in a method of selectively replacing and mounting a plurality of nozzles stored in a nozzle device in a tundish by using a nozzle device provided in a tandem opening and closing port during a continuous casting process, The nozzle can be quickly and accurately replaced. At this time, by moving the nozzle using the operation member having the gear surface, the position of the nozzle can be precisely controlled at the time of replacing the nozzle.

As described above, since the nozzle replacement operation can be performed continuously and safely during the continuous casting process, for example, in the case of replacing the nozzle for controlling the molten steel discharge amount, the nozzle replacement operation shortens the time required for nozzle replacement The amount of molten steel to be discharged can be controlled quickly, thereby contributing to the improvement of the productivity of the continuous casting process.

Further, since the nozzle replacement operation can be performed precisely during the continuous casting process, leakage of molten steel during replacement of the nozzle can be prevented, and it is possible to prevent the casting stop due to molten steel flow.

1 is a view showing a continuous casting facility and a nozzle apparatus according to an embodiment of the present invention.
2 is a view showing a nozzle device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. In the meantime, the drawings may be exaggerated to illustrate embodiments of the present invention, wherein like reference numerals refer to like elements throughout.

The present invention relates to a nozzle device capable of replacing a nozzle for discharging various processed materials in a molten state, which are mounted in a container and discharged to the outside of a container. In an embodiment of the present invention, The embodiment of the present invention will be described in detail with reference to a nozzle device mounted on a tundish containing a steel. However, the present invention can be applied as a nozzle device of various equipments that supply various melts to the inside and stay therein for a predetermined time and supply the melted material to subsequent facilities.

Fig. 1 (a) is a view showing a continuous casting facility according to an embodiment of the present invention. Fig. 1 (b) is an enlarged view of a portion A in Fig. 1 Fig. Fig. 2 (a) is a three-dimensional view showing the overall shape of the nozzle device shown in Fig. 1 (b), and Fig. 2 (b) Fig. 2 (c) is a cross-sectional view of the nozzle member in the nozzle device according to the embodiment of the present invention shown in Fig. 2 (a) Fig.

1 (a), a continuous casting facility according to an embodiment of the present invention will be described. A continuous casting facility according to an embodiment of the present invention includes a ladle 10 in which a space containing a processed product such as molten steel M is formed, a ladle 10 mounted at a lower portion of the ladle 10, A shroud nozzle 20 communicating with the shroud nozzle 20 and a tundish (not shown) disposed inside the ladle 20 and having a space therein for temporarily storing and storing the molten steel M, The upper tundish 30 is attached to the tundish 30 through an opening formed in the lower portion of the tundish 30 and includes an upper nozzle 31 communicating with the inside of the tundish 30, And a nozzle device 400 connected thereto.

The ladle 10 is a cylindrical container whose interior is opened upward, and a cover can be mounted on the upper portion, and a refractory can be built up so that the molten steel M can be contained therein. The ladle 10 may be movably provided on the upper side of the tundish 30. The ladle (10) serves to supply molten steel (M) contained in the ladle (10) to the tundish (30). A collector nozzle (not shown) may be mounted through the lower side of the ladle 10, and a shroud nozzle 20 may be connected to a lower portion of the collector nozzle.

The shroud nozzle 20 is a hollow member extending in the thickness direction, for example, in the y-axis direction, and can be movably supported on a manipulator (not shown) provided at one side of the outside of the tundish 30, 10 to communicate with the inside of the ladle 10. In this case,

The tundish 30 is a predetermined container disposed below the ladle 10. The tundish 30 receives molten steel M from the ladle 10 and temporarily stores the molten steel M in a mold Not shown). The tundish 30 may include an outer wall and a refractory portion formed inside the inner wall of the tundish 30 to maintain the shape of the tundish 30.

The inside of the tundish 30 can be opened upward, and the cover can be mounted on the top. An inlet (not shown) may be formed at the center of the cover, and the shroud nozzle 20 may be inserted into the tundish 30 through the hole. The lower portion of the tundish 30, for example, a bottom portion of the tundish 30 may be formed to penetrate through the thickness direction, and the upper nozzle 31 may be mounted on the louver.

The upper nozzle 31 may be formed to extend in the thickness direction, and a passageway through which the molten steel M passes may be formed therein. The upper and lower portions of the passageway may be opened and closed at upper and lower surfaces of the upper nozzle 31, . The upper nozzle 31 may be formed of a refractory material.

A nozzle device 400 according to an embodiment of the present invention may be mounted on the lower side of the upper nozzle 31. The nozzle device 400 replaces and mounts a plurality of nozzles stored in the nozzle device 400 on the lower surface of the upper nozzle 31 to control the amount of molten steel M.

The nozzle device 400 according to the embodiment of the present invention will be described below in detail with reference to a mold (not shown) and a cooling zone (not shown), which will be described later.

The continuous casting equipment according to the embodiment of the present invention includes a mold (not shown) that receives molten steel M from the tundish 30 and first coagulates in a pellet form and continuously draws downward, (Not shown) for cooling the coolant and performing a series of molding operations.

A mold (not shown) is a hollow member formed in a rectangular shape or a regular shape and includes a pair of first plates spaced apart from each other in the width direction, for example, an x-axis direction, A side wall is formed by a pair of second plates connecting the opposite side edges of the first and second plates, and a passage through which the molten steel M passes is provided. The mold may be disposed so as to face the nozzle device 400 on the lower side of the nozzle device 400 and may be supplied with molten steel M falling through the nozzle device 400 to be primary solidified, So that it plays a role of pulling out.

The cooling zone (not shown) performs a series of molding operations by secondarily cooling the cast material drawn from the mold at the lower side of the mold. The cooling zone may include a plurality of segments, and the plurality of segments may be continuously arranged in a predetermined direction to form a curved cooling path or a vertical curved cooling path. Each of the segments may be provided with a plurality of rolls to guide the drawing of the cast steel, and a cooling water injection nozzle may be provided between each of the rolls so that cooling water may be injected into the cast steel to perform secondary cooling.

The nozzle device 400 according to the embodiment of the present invention will be described in detail with reference to Figs. 1 (b) and 2 (a) to 2 (c).

The nozzle device 400 according to the embodiment of the present invention includes a main body 410 disposed at a lower side of a vessel such as a tentacle of the tundish 30 and a plurality of main bodies 410 penetrating the main body 410 in the thickness direction, A nozzle 420, a guide portion for movably guiding the main body 410 in the longitudinal direction, for example, a z-axis direction, and an operation portion for supporting the main body 410 so as to be movable in the longitudinal direction.

The main body 410 is a flat plate-like member having a predetermined area extending in the longitudinal direction (z-axis direction) and the width direction (x-axis direction) and extending in the thickness direction (y- And serves as a stand for storing a plurality of nozzles 420.

Of course, the shape of the main body 410 is not limited to the above shape. The main body 410 may be a member of various shapes that satisfies the requirement that the tundish 30 has an upper surface facing the louver at the lower side thereof and that it can serve as a stand for storing the plurality of nozzles 420 have. In the embodiment of the present invention, a rectangular plate-shaped main body 410 is exemplified.

The main body 410 may be arranged to face the bottom of the tundish 30 at the lower side of the tundish 30 and specifically at the lower side of the upper nozzle 31 mounted at the lid of the tundish 30 As shown in FIG.

A mounting hole H may be formed through a plurality of positions of the upper surface of the main body 410 in the thickness direction. The number of the mounting holes H may correspond to the number of the nozzles 420. In the embodiment of the present invention, for example, four mounting holes H are exemplified. Of course, the number of mounting holes H can be variously changed. The plurality of mounting holes H may be arranged in parallel with the longitudinal direction. At this time, the longitudinal direction may be the same direction as the direction in which the main body 410 is moved by the operating portion. That is, the plurality of mounting holes H may be arranged in parallel in the direction in which the main body 410 moves.

The cross-sectional shape of the mounting hole H is not particularly limited, and in the embodiment of the present invention, a mounting hole H formed in a circular cross-sectional shape for facilitating the mounting of the nozzle 420 is illustrated. The size of the mounting hole H may correspond to a size to which the protrusion 422 of the nozzle can be inserted and mated. That is, the size of the inner diameter of the mounting hole H may be the same within the tolerance of the outer diameter of the protrusion 422 of the nozzle.

The spacing between the plurality of mounting holes H may correspond to the width of the upper surface of the nozzle 420. That is, when the plurality of nozzles 420 are mounted on the main body 410, the respective nozzles 420 are spaced apart from each other by a predetermined distance, Specifically, the distance between the center portions of the mounting holes H can be formed.

The permissible range is a predetermined range in which the thermal expansion of the nozzle 420 due to the high temperature can be stably accommodated when the nozzle 420 is replaced by the nozzle device 400, Of the molten steel M to the lower surface of the upper nozzle 31 while shifting the molten steel M in the longitudinal direction while stably restraining or preventing the molten steel M from flowing out. For example, when the upper surface width in the longitudinal direction of the nozzle 420 is 1, the distance between the center portions of the mounting holes H may be 1 or an approximate value of 1 larger than 1. [

Meanwhile, the material of the body 410 may include steel, and in the embodiment of the present invention, the material of the body 410 is exemplified as the material of the body 410.

The nozzle 420 may be mounted through the mounting hole H of the main body 410 in the thickness direction at a plurality of positions spaced apart in the longitudinal direction. The nozzle 420 may include, for example, a metering nozzle that is applied to a continuous casting process of a steelworks. The nozzle 420 may be made of a refractory material, and the side surface may be protected by iron.

The nozzle 420 has a nozzle body 421 having a predetermined width and extending in the longitudinal direction and the width direction and extending in the thickness direction and having a predetermined thickness, a protruding portion protruding downward from the lower surface of the nozzle body 421 422).

The nozzle body 421 may be in the form of a rectangular parallelepiped or a cuboid, but is not particularly limited to this. The protrusion 422 may be formed in a cylindrical shape corresponding to the shape of the mounting hole H of the main body 410, for example. The width of at least one of the longitudinal direction and the width direction of the nozzle body 421 may be greater than the width of at least one of the longitudinal direction and the width direction of the protruding portion 422. [ The nozzle 420 is supported on the upper surface of the main body 410 by the nozzle body 421 and the protruding portion 422 is inserted into the mounting hole H of the main body 410 and can be coupled to the main body 410.

A discharge port h may be formed through the center of the nozzle body 421 and the projection 422 in the thickness direction. The discharge port (h) serves as a passage for passing molten steel (M). The inner diameter d of the discharge port h may be different from each other for each nozzle 420. Accordingly, it is possible to control the discharge amount of the molten steel (M) of the tundish (30) by selectively replacing the plurality of nozzles (420) on the lower surface of the upper nozzle (31)

The guide portion serves to guide the main body 410 so as to be movable in the longitudinal direction. For this, the guide portion is rotatably installed on one side in the width direction of the guide member 430, for example, the rail and the main body 410, which is separated from the main body 410 in the width direction and extends in the longitudinal direction, And a roller 440 that is mounted to be rotatably supported on the guide member 430. Although not shown in the drawing, a plurality of rollers 440 can be provided, and the movement of the main body 410 can be more stably supported. The guide portion can smoothly guide longitudinal movement of the main body 410 by using the roller 440 and the guide member 430. [ The guide member may be made of the same material as the material of the main body 410 or may be made of various materials having heat resistance capable of withstanding the high temperature of the tundish 30.

The operation part serves to support the main body 410 so as to be movable in the longitudinal direction. To this end, the operation unit includes a driving unit 450 that is spaced from the main body 410 on the lower side of the main body 410 to the other side in the width direction and is spaced apart from the one side in the longitudinal direction, And includes a first operating member 460 rotatably mounted on the driving means 450 at a position spaced apart from the main body 410 in the width direction and a second operating member 460 rotatably mounted on the main body 410 And a second actuating member 470 attached to the gear surface of the first actuating member and having a predetermined gear surface formed on the outer periphery thereof.

The driving means 450 may include a motor, and may specifically include a stepping motor. The driving means 450 serves to rotate the first actuating member 460 in the z-axis direction following the correct rotational speed. The first actuating member 460 may include a screw gear, and the second actuating member 470 may include a helical gear.

The first actuating member 460 and the second actuating member 470 are mounted such that gear surfaces formed on the outer circumferential surfaces of the first actuating member 460 and the second actuating member 470 are engaged with each other, Axis rotation, and the main body 410 can be used for longitudinal movement.

The rotation direction and the rotation angle of the first actuating member 460 are precisely controlled by the driving means 450 so that the movement of the main body 410 in accordance with the gear ratio between the first actuating member 460 and the second actuating member 470 The timing position can be precisely controlled. Accordingly, any selected one of the plurality of nozzles 420 can be precisely positioned below the upper nozzle 31 of the tundish 30, and these nozzles can be contact-connected. On the other hand, the available pressure of the driving means 450 is at most 10 bar.

Hereinafter, the operation of the nozzle device 400 according to the embodiment of the present invention will be described with reference to Figs. 1 (b) to 2 (c).

First, a plurality of nozzles 420 having different inner diameters d are mounted on the mounting hole H of the main body 410, and a nozzle having a desired inner diameter among the plurality of nozzles 420 is selected, 31 in a manner such that they are aligned and brought into contact with the lower surface of the frame.

Thereafter, the molten steel M is injected into the body 410, and the molten steel M is injected into the mold 410 to perform a continuous casting process. For example, when it is necessary to change the discharge amount of molten steel (M) according to the operation schedule or the competitive operating conditions, the automatic replacement of the nozzle 420 by the nozzle device 400 according to the embodiment of the present invention is performed.

Meanwhile, the operation of the nozzle device 400 described below may be automatically controlled by a control unit (not shown). To this end, the nozzle device 400 according to the embodiment of the present invention may further include a control unit. The control unit may include a control system, e.g., a workstation, in which a process control program is embedded. Since the control unit is not particularly limited in the embodiment of the present invention, a detailed description thereof will be omitted.

A nozzle to be replaced among the plurality of nozzles 420 is selected in comparison with the inner diameter size of the input nozzle 420 and the inner diameter size of the nozzle corresponding to the desired discharge amount of the molten steel M. The position of the nozzle being used in the current operation and the position information of the nozzle to be replaced among the plurality of nozzles 420 provided in the nozzle device 400 are inputted to calculate the moving direction and the moving distance of the main body 410, Controls the output of the means 450 to rotate the first actuating member 460 at the desired number of revolutions and speed. Thus, the second actuating member 470 is rotated to move the main body 410 by a predetermined distance in the longitudinal direction.

The nozzle to be replaced among the plurality of nozzles 420 is aligned on the lower side of the upper nozzle 31 by the movement of the main body 410 and can be closely mounted on the lower surface of the upper nozzle 31 for replacement. Subsequently, as the passage of the upper nozzle 31 communicates with the discharge port of the replaced nozzle, the molten steel M can be injected into the mold with the changed discharge amount. As described above, in the embodiment of the present invention, it is possible to quickly and easily control the discharge amount of molten steel M while continuing the continuous casting process. On the other hand, the nozzle of the plurality of nozzles 420 which has been in use can be moved to the outside of the upper nozzle 31 after the replacement, and can be switched to the standby state again.

As described above, the nozzle device 400 can move the main body 410 by a desired distance and accurately position the nozzle to be replaced on the lower side of the upper nozzle 31. Such a process may be repeated as many times as desired to sequentially change the nozzles 420 coupled to the upper nozzle 31 of the main body 410 in an arbitrary order.

At this time, since the actuating part moves the main body 410 in an operating mode by means of gears, the passage h of the nozzle 420 and the passage of the upper nozzle 31 can be exactly aligned vertically. That is, in the embodiment of the present invention, it is possible to precisely control the position when the nozzle is replaced.

It should be noted that the above-described embodiments of the present invention are for the purpose of illustrating the present invention and not for the purpose of limitation of the present invention. The present invention may be embodied in various forms without departing from the scope and range of equivalents of the claims. Further, the technical idea of the embodiments of the present invention may be implemented by being combined or crossed each other in various ways. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10: ladle 20: shroud nozzle
30: tundish 31: upper nozzle
400: nozzle device 410:
420: nozzle 421: nozzle body
422: protrusion 430: guide member
440: roller 450: driving means
460: first operating member 470: second operating member

Claims

A body extending in the longitudinal direction and disposed under the louver of the container;
A mounting hole arranged in the longitudinal direction and formed through a plurality of positions of the main body;
A nozzle inserted into and inserted into the plurality of mounting holes in the thickness direction;
A guide portion for guiding the main body movably in the longitudinal direction; And
And an operating part mounted on the main body so that a desired one of the plurality of nozzles can be vertically aligned below the louver by moving the main body in the longitudinal direction.

delete

The method according to claim 1,
Wherein the main body has an upper surface facing a lug of the container,
Wherein the mounting hole is formed to penetrate a plurality of positions of the upper surface in a thickness direction.

The method of claim 3,
And the spacing between the mounting holes corresponds to the width of the top surface of the nozzle.

The method of claim 3,
The nozzle
A nozzle body having a width in a longitudinal direction and a width direction and extending in a thickness direction; And
And a projection protruding from a lower surface of the nozzle body,
And a discharge port is formed through the center of the nozzle body and the projection in a thickness direction.

The method of claim 5,
Wherein the nozzle body is supported on an upper surface of the main body, and the protrusion is inserted into a mounting hole of the main body so that the nozzle is engaged with the main body.

The method of claim 3,
The guide portion
A guide member spaced apart from the body in the width direction and extending in the longitudinal direction; And
And a roller rotatably mounted on one side in the width direction of the main body and supported so as to be able to run on the guide member.

The method of claim 3,
Wherein,
A driving means disposed apart from the body in the width direction;
A first actuating member extending in the longitudinal direction and having a gear surface formed on the outer periphery thereof and rotatably mounted on the driving means; And
And a second actuating member mounted on the other side in the width direction of the main body so as to be rotatable about the central axis in the width direction and having a gear surface formed on an outer periphery thereof and coupled to a gear surface of the first actuating member, Device.

The method of claim 8,
Wherein the driving means includes a motor,
Wherein the first actuating member includes a screw gear,
Wherein the second actuating member comprises a helical gear.

The method according to claim 1,
An upper nozzle is mounted on the ladle of the container,
Wherein one of the plurality of nozzles is aligned on the lower side of the upper nozzle by the longitudinal movement of the main body, and is brought into close contact with the lower surface of the upper nozzle.