KR20210024896A - Apparatus for coupling of nozzle and method for coupling of nozzle - Google Patents

Abstract

The present invention relates to a nozzle fastening device and a nozzle fastening method. More particularly, the present invention relates to a nozzle fastening device for fastening a second nozzle to a first nozzle. According to the present invention, the nozzle fastening device comprises: a fixing part installed on the first nozzle; a connection part capable of being coupled to the second nozzle, having at least a portion in contact with the fixing part, formed to adjust a position, and capable of being coupled to the fixing part; and a driving part connected to the connection part so as to rotate the connection part. Accordingly, the nozzle can be fastened without tilting.

Description

Nozzle fastening device and nozzle fastening method {Apparatus for coupling of nozzle and method for coupling of nozzle}

The present invention relates to a nozzle fastening device and a nozzle fastening method, and to a nozzle fastening device and a nozzle fastening method capable of matching and coupling central axes of two nozzles in fastening two nozzles arranged vertically.

In general, a continuous casting facility transfers molten steel produced in the steel making process in a ladle, supplies it to a tundish using a shroud nozzle in the continuous casting process, and then transfers it to a mold for continuous production of cast iron of the desired size. It is a facility to do.

In general, in a continuous casting facility, a ladle transporting molten steel is seated on a ladle turret and alternately positioned on top of the tundish. At this time, the ladle turret may seat the ladles on both sides of the swing tower that is rotationally driven, and alternately position the ladles on the upper portion of the tundish by rotation of the swing tower. In addition, a collector nozzle is provided under the ladle, and a shroud nozzle is provided that is connected to the collector nozzle to charge the molten steel inside the ladle into a tundish.

The shroud nozzle connects the collector nozzle under the ladle with the tundish to prevent contamination of the molten steel when injecting molten steel, and it is supported by a manipulator installed on one side of the playing facility and connected to the collector nozzle by manipulating the manipulator. At this time, there was a problem that the shroud nozzle could not be connected while the central axis was coincident with the collector nozzle. Accordingly, there is a problem that a gap is generated in the connection portion between the collector nozzle and the shroud nozzle, and the molten steel flows back through the gap. In addition, there is a problem that the molten steel is contaminated due to air being mixed between the gaps. In addition, the refractory material constituting the shroud nozzle was unevenly melted at the contact part of the collector nozzle and the shroud nozzle, resulting in a problem of shortening the life of the shroud nozzle.

JP 1995-080610

The present invention provides a nozzle fastening device and a nozzle fastening method capable of connecting two nozzles by matching their central axes.

The present invention provides a nozzle fastening device and a nozzle fastening method capable of maintaining a combined state of two nozzles.

A nozzle fastening device according to an embodiment of the present invention is a nozzle fastening device for fastening a second nozzle to a first nozzle, comprising: a fixing part installed on the first nozzle; A connection part that can be combined with the second nozzle, at least a part of which is in contact with the fixing part and is formed to be adjustable in position, and which can be combined with the fixing part; And a driving part connected to the connection part so as to couple or separate the connection part to the fixed part by rotating the connection part.

The fixing part includes a connecting member extending vertically, and the connecting part includes a connecting part body penetrating vertically and a guide slit formed on a side surface of the connecting part body so as to be coupled with the connecting member.

Three or more coupling members and the guide slit are formed in a circumferential direction, and the plurality of coupling members are radially spaced apart from a central axis of the first nozzle and disposed parallel to a central axis of the first nozzle, The plurality of guide slits are spaced apart from the central axis of the connecting portion body, and at least a portion thereof is disposed parallel to the central axis of the connecting portion body.

The coupling member includes a first body extending vertically; And a second body extending radially from the first body and insertable into the guide slit.

The connecting portion may include: the guide slit having one side extending in the vertical direction and the other side extending in the circumferential direction; A guide rib installed on the side of the connecting body to be inserted into the driving unit; And a first gear member connected to the driving unit and installed on a side surface of the connecting unit body.

The driving unit may include a driving unit body movably coupled to the guide rib; And

A driver connected to the first gear member and installed on the driving unit body so as to move the driving unit body; And a coupling plate coupled to both sides of the drive unit body.

The driver includes a power member capable of generating a driving force; And a second gear member having one side rotatably engaged with the first gear member and the other side rotatably installed on the power member.

The guide rib is recessed inward on the upper surface and the lower surface, and a first groove extending along the guide rib is formed, and the driving part body is a coupling protrusion protruding inward so as to be inserted into the first groove. Is formed.

One side of the guide slit has a tapered or round shape at the end.

It further includes a; a control unit for controlling the rotation angle of the connection portion.

The control unit may include a plurality of measuring devices installed on the connection unit to measure a rotation angle of the connection unit, and at least one of which may be disposed to face the driving unit; And a controller connected to the measuring device and controlling the operation of the driving unit with values measured by the plurality of measuring devices.

A nozzle fastening method according to an embodiment of the present invention is a nozzle fastening method of fastening a second nozzle to a first nozzle, comprising: disposing the second nozzle under the first nozzle; Moving the second nozzle to face the first nozzle; Matching the central axis of the second nozzle with the central axis of the first nozzle; And rotating the second nozzle and coupling it to the first nozzle.

The process of matching the central axis of the second nozzle with the central axis of the first nozzle includes a plurality of couplings installed on the first nozzle by moving the second nozzle up and down so that the connecting body coupled with the second nozzle is installed on the first nozzle. The process of contacting the member; And inserting the coupling member into a guide slit formed on the connecting portion body at a plurality of positions to move the second nozzle toward a central axis of the first nozzle.

The process of rotating the second nozzle and coupling it to the first nozzle includes a step of rotating the connection part body while the coupling member is inserted into the guide slit to hook and support the coupling member on the connection part body. .

The process of rotating the second nozzle and coupling the second nozzle to the first nozzle includes a process of inspecting the coupling state of the second nozzle with the first nozzle.

The process of inspecting the coupling state of the second nozzle with the first nozzle may include measuring a rotation degree of the second nozzle and comparing the measured measurement value with a preset setting value; And determining that the second nozzle is coupled to the first nozzle when the measured value is greater than or equal to the set value.

The process of measuring the degree of rotation of the second nozzle may include: measuring a length in the circumferential direction from a reference point of the connector body coupled with the second nozzle to an actuator; And converting the length into a rotation angle.

According to an embodiment of the present invention, when the second nozzle is fastened to the first nozzle, the first nozzle and the second nozzle may be fastened while the central axes of the first nozzle and the second nozzle are aligned. Accordingly, it is possible to prevent a gap from being generated between the first nozzle and the second nozzle.

In addition, it is possible to prevent a problem in that the molten steel is re-oxidized by mixing air through the gap between the first nozzle and the second nozzle.

In addition, it is possible to prevent the occurrence of uneven melting loss of the second nozzle due to poor verticality of the second nozzle.

1 is a view showing the structure of a continuous casting equipment according to an embodiment of the present invention.
2 is a view showing the structure of a nozzle coupling device according to an embodiment of the present invention.
3 is a view showing an exploded and combined state of a nozzle coupling device according to an embodiment of the present invention.
4 is a view showing a state in which a first nozzle and a second nozzle are coupled through a nozzle coupling device according to an embodiment of the present invention.
5 is a view showing a process in which a first nozzle and a second nozzle are combined according to an embodiment of the present invention.
6 is a flow chart showing a nozzle coupling method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the present embodiments make the disclosure of the present invention complete, and the scope of the invention to those of ordinary skill in the art It is provided to inform you. In order to describe the invention in detail, the drawings may be exaggerated, and the same reference numerals refer to the same elements in the drawings.

1 is a view showing the structure of a continuous casting equipment according to an embodiment of the present invention.

Referring to Figure 1, the continuous casting equipment according to an embodiment of the present invention is a ladle (L) for taking molten steel, a tundish (T) for temporarily receiving molten steel supplied from the ladle, and a first nozzle mounted under the ladle ( 1) It may include a second nozzle 2 connecting the first nozzle 1 and the tundish to supply molten steel in the ladle to the tundish. In addition, the continuous casting facility includes a mold (M) that first solidifies molten steel, an immersion nozzle (3) that supplies molten steel in the tundish to the mold, a guide roll (4) that facilitates movement of the cast pieces drawn from the mold, and It may include a cooling water spray nozzle 5 for spraying the cooling water on the cast iron.

The ladle (L) according to the embodiment is a container that receives molten steel that has undergone converter refining and provides it in a tundish, and may be a general configuration applied to the steelmaking, steelmaking, or casting field.

The tundish has an internal space for receiving the molten steel discharged from the ladle, a main body provided with a discharge hole through which molten steel is discharged, a weir installed on the upper side so as to be spaced apart from the bottom of the main body inside the main body, and one end between the weir and the discharge hole is the bottom of the main body. It may include a dam installed to be connected to.

The first nozzle 1 may supply the molten steel of the ladle to the second nozzle 2 and may be a collector nozzle in the art. The first nozzle 1 is formed to extend in the vertical direction therein to provide a passage through which molten steel can flow, the upper part is connected to the discharge hole of the ladle, and the lower part may be connected to the second nozzle 2 to be described later. It may be preferable that the outer peripheral surface of the lower portion of the first nozzle 1 is provided in a shape corresponding to the upper surface of the second nozzle 2.

The second nozzle 2 can supply molten steel provided from the first nozzle 1 to a tundish, and may be a conventional shroud nozzle in the art.

The upper portion of the second nozzle 2 is a portion into which the lower portion of the first nozzle 1 is inserted, and the inner wall surface of the upper portion has a slope corresponding or corresponding to the slope of the outer peripheral surface of the lower portion of the first nozzle 1. Can be formed. That is, the upper portion of the passage of the second nozzle 2 may be formed such that the inner diameter gradually decreases toward the lower side.

Meanwhile, the second nozzle 2 may be supported by a manipulator 200 that is a separate support device. The second nozzle 2 is supported by the manipulator 200 to move upward and downward, and may be coupled to the first nozzle 1. Accordingly, molten steel stored in the ladle may be injected into the tundish through the first nozzle 1 and the second nozzle 2.

2 is a view showing a structure of a nozzle coupling device according to an embodiment of the present invention, FIG. 3 is a view showing an exploded and combined state of the nozzle coupling device according to an embodiment of the present invention, and FIG. A view showing a state in which a first nozzle and a second nozzle are coupled through a nozzle coupling device according to an embodiment of the present invention.

2 to 4, the nozzle fastening apparatus 100 according to an embodiment of the present invention will be described in detail. In an embodiment of the present invention, the first nozzle 1 may be, for example, a collector nozzle, and the second nozzle 2 may be, for example, a shroud nozzle. However, the application range of the first nozzle 1 and the second nozzle 2 is not limited thereto and may be various.

The present invention is a nozzle fastening device 100 for fastening the second nozzle 2 to the first nozzle 1, and is combined with the fixing part 110 installed on the first nozzle 1 and the second nozzle 2 It is possible and at least a portion of the connection part 120 is formed to be in contact with the fixing part 110 and adjusts the position, and the connection part 120 that can be coupled to the fixing part 110 and the driving part connected to the connection part 120 so as to rotate the connection part 120 It may include (130). In addition, the nozzle fastening device 100 may further include a control unit 140 that controls the rotation angle of the connection unit 120.

The fixing part 110 may include a coupling member 111 extending vertically. The coupling member 111 may be inserted into the guide slit 122 of the connecting portion 120 to be described later, and in the insertion process, the central axis of the second nozzle 2 may be matched with the central axis of the first nozzle 1. have. At least three coupling members 111 may be provided, and may be radially spaced apart from the central axis of the first nozzle 1 and disposed parallel to the central axis of the first nozzle 1.

In general, in order to match the centers of one circle and the other in a plane, the center axes of two circles can be matched when the position is adjusted in at least three directions or three points. For example, when positioning in three directions separated by 120° from the center of the circle, the central axes of the two circles can be matched. Accordingly, in the following, a case in which three coupling members 111 are provided and spaced by 120° in the circumferential direction with respect to the central axis of the first nozzle 1 will be exemplified. Here, the circumferential direction may be a circumferential direction of a circle based on the central axis of the first nozzle 1 or the second nozzle 2. However, the number of coupling members 111 is not limited thereto and may be varied.

The coupling member 111 may include a first body 111a extending vertically and a second body 111b extending from a lower side of the first body 111a.

The first body 111a may be formed to extend in the vertical direction, and the outer circumferential surface may be formed to be curved in the circumferential direction. That is, the first body 111a may be formed to have a curvature. Accordingly, the first body 111a may be in surface contact with the inner circumferential surface of the connection body 121 to be described later. For example, the size of the curvature of the outer circumferential surface of the first body 111a may be less than or equal to the size of the curvature of the inner circumferential surface of the connector body 121 to 2/3 or more of the curvature size of the inner circumferential surface of the connection body 121.

When the curvature size of the outer circumferential surface of the first body 111a is formed to be the same as the curvature size of the inner circumferential surface of the connection body 121, the entire outer circumferential surface of the first body 111a is the connection body 121 when the connection body 121 is rotated. It can be in contact with the inner circumferential surface of. Accordingly, since a gap does not occur between the first body 111a and the connection body 121, the first body 111a and the connection body 121 may be supported more firmly when the connection body 121 is rotated.

When the curvature of the outer circumferential surface of the first body 111a is formed to be 2/3 of the curvature of the inner circumferential surface of the connecting body 121, only a part of the outer circumferential surface of the first body 111a and the inner circumferential surface of the connecting body 121 You can make an interview. That is, only a part of the area based on the change point of the curvature of the outer circumferential surface of the first body 111a may be in surface contact with the inner circumferential surface of the connector body 121. Accordingly, since the contact area between the outer circumferential surface of the first body 111a and the inner circumferential surface of the connecting unit body 121 is relatively reduced, the connecting unit body 121 can be rotated more smoothly. In this embodiment, a case in which the curvature size of the outer circumferential surface of the first body 111a is formed equal to the curvature size of the inner circumferential surface of the connection part body 121 will be described as an example.

Further, the formation by the length L ₁ is the length of 0.96 of the radial length R ₁ or less to the radial length R ₁ of the inner circumferential surface of the connecting body 121 in the center axis of the first nozzle (1) to the outer peripheral surface of the first body (111a) Can be. Here, the length _{of 0.96 of the radius length R 1} may be a value to which a loose fit tolerance ratio is applied, and a description related to the tolerance will be described again below. Accordingly, when rotating the connection body 121, the first bodies 111a provided in three as described above and the inner circumferential surface of the connection body 121 may all come into contact with each other. Therefore, a gap may not occur between the first bodies 111a and the inner circumferential surface of the connection body 121, and even if the connection body 121 rotates, the central axis of the second nozzle 2 and the first nozzle 1 You can keep this matched state.

The second body 111b may extend radially from the lower side of the first body 111a. Here, the radial direction may be directions perpendicularly orthogonal to the central axis of the first nozzle 1 or the second nozzle 2. For example, the second body 111b may be formed in the shape of a rectangular parallelepiped extending in the radial direction. In addition, the second body 111b may be inserted into the guide slit 122 of the connection body 121 to be described later. To this end, the second body 111b may be formed equal to the size of the guide slit 122 or smaller than the size of the guide slit 122. Here, the length of the second body 111b in the width direction _{may be L 2} , and the length of the second body 111b in the vertical direction may be _{L 3.} Here, the width direction of the second body 111b may be a direction perpendicular to the vertical direction and the radial direction. The size relationship between the second body 111b and the guide slit 122 will be described again below. Here, the structure and shape of the second body 111b are not limited thereto and may be various.

The connecting part 120 may have an upper side coupled to the coupling member 111 and a lower side coupled to the second nozzle 2. The connection part 120 includes a connection part body 121, a guide slit 122 into which the coupling member 111 can be inserted, a guide rib 123 inserted into the driving part 130, and a first gear member 124. I can.

The connecting portion body 121 may be formed by passing through the top and bottom. In the following description of the connection body 121, the connection body 121 is divided into an upper body 121a and a lower body 121b, and the upper body 121a may have a hollow cylindrical shape extending vertically. In addition, the lower body 121b may have a semicircular dome shape whose inner diameter decreases toward the bottom. Accordingly, the second nozzle 2 penetrates the center of the lower body 121b, and the upper outer circumferential surface of the second nozzle 2 is caught and supported by the inner circumferential surface of the lower body 121b, and the connection body 121 and the second nozzle ( 2) can be combined.

The guide slit 122 may couple the coupling member 111 and the connection portion body 121, is formed on the side surface of the connection portion body 121, and may be provided in plural according to the number of the coupling members 111 formed. The guide slit 122 may be formed to be radially spaced apart from the central axis of the connecting portion body 121 at predetermined intervals. Hereinafter, a case in which the guide slit 122 is formed on the upper body 121a, is provided in three and is spaced apart by 120° in the circumferential direction will be exemplarily described. A part of the guide slit 122 may extend vertically, and a part of the guide slit 122 may extend in a radial direction from a lower side of a part that extends vertically. In the following, a portion extending vertically is referred to as a first slit 122a, and a portion extending in the radial direction is referred to as a second slit 122b. That is, the second body 111b may be first inserted into the first slit 122a and then inserted into the second slit 122b by the rotation of the connector body 121.

The first slit 122a may extend through the upper body 121a in a radial direction and extend in a vertical direction. Here, the length of the first slit 122a in the width direction may be _{L 4.} The second slit 122b extends from the lower side of the first slit 122a, penetrates the upper body 121a in a radial direction, and may extend in a circumferential direction. Here, the length of the second slit 122b in the vertical direction _{may be L 5} , and the length in the circumferential direction may be _{X 1.}

In order to insert the second body 111b into the first slit 122a, the length L ₄ in the width direction of the first slit 122a may be formed to have a _{length L 2} or more in the width direction of the second body 111b. have. In general, it is very difficult to finish the product according to the dimensions in the machining of mechanical parts, so the maximum and minimum allowable dimensions of the mechanical parts are set. In this case, the difference between the maximum and minimum allowable dimensions is called tolerance. Depending on the range of allowable tolerances when joining mechanical parts, forced fit, intermediate fit, and loose fit can be performed. _{Accordingly, the length L 4} in the width direction of the first slit 122a is equal to the _{length L 2 in} the width direction of the second body 111b so that the first slit 122a and the second body 111b can be loosely fitted. Can be formed to be longer or longer. In addition, so that the second body 111b can be inserted into the second slit 122b, the vertical length L ₅ of the second slit 122b is equal to or longer than _{the vertical length L 3} of the second body 111b. Can be formed. Accordingly, it is possible to fit the second slit 122b and the second body 111b loosely. Accordingly, the second body 111b can be smoothly inserted into the first slit 122a and the second slit 122b.

In addition, the first slit 122a may be formed in a tapered or round shape at the top. In the present invention, a case in which the upper portion of the first slit 122a is formed in a tapered shape will be exemplarily described. Thus, when the second body 111b is inserted into the first slit 122a, even if the center of the second body 111b in the width direction and the center of the first slit 122a in the width direction do not coincide, the second body 111b ) Moves along the tapered portion and the first slit 122a may be inserted. That is, it moves along the tapered portion and may match the center of the second body 111b in the width direction and the center of the first slit 122a in the width direction. The structures and shapes of the first slit 122a and the second slit 122b are not limited thereto and may be various.

The guide rib 123 may couple the connecting portion body 121 and the driving portion 130, and may be installed on the side of the connecting portion body 121. Hereinafter, a case in which the guide ribs 123 are provided in a single number and formed on the upper body 121a will be described as an example. The guide rib 123 may be disposed between the plurality of guide slits 122 on the side of the upper body 121a. The guide rib 123 may have a constant curvature along the outer circumferential surface of the connecting portion body 121 and may be formed to extend. In the following, a portion formed at an end in a clockwise direction with respect to the circumferential direction of the guide rib 123 is defined as one end, and a portion formed at an end in a counterclockwise direction is defined as the other end. In this case, the length in the circumferential direction from one end of the guide rib 123 to the adjacent first slit 122a may be _{X 2.} In addition, the length in the circumferential direction from the other end of the guide rib 123 to the adjacent first slit 122a may be _{X 3.}

In addition, the guide rib 123 may have a first groove 123a recessed inwardly on an upper surface and a lower surface. The coupling protrusion 131a of the driving unit 130 to be described later is inserted into the first groove 123a and may be fitted. For example, the guide rib 123 may have a'H' shape in cross section. The guide rib 123 is manufactured separately from the connection body 121 and may be coupled by welding or the like. The structure and shape of the guide rib 123 are not limited thereto and may be various.

The first gear member 124 is connected to the driving unit 130 and may be installed under the guide rib 123 from the side of the connection unit body 121. Hereinafter, a case in which the first gear member 124 is formed on the upper body 121a will be described by way of example. The first gear member 124 may mesh with a second gear member 132b to be described later. The first gear member 124 is provided in a number of stages, is disposed between the plurality of guide slits 122, and may be formed to extend along the outer circumferential surface of the upper body 121a. The first gear member 124 may have gear teeth formed on one surface. For example, the first gear member 124 may include a rack gear. However, the structure and shape of the first gear member 124 is not limited thereto and may be various.

The driving unit 130 may rotate the connection unit body 121. The driving unit 130 may include a driving unit body 131 coupled to the guide rib 123, a driver 132 capable of transmitting a driving force to the driving unit body 131, and a coupling plate 133.

At least a portion of the driving unit body 131 may contact the outer circumferential surface of the connection unit body 121 and may be movably coupled to the guide rib 123. To this end, the driving unit body 131 may have a constant curvature along the outer circumferential surface of the connection unit body 121 and extend. In addition, the driving unit body 131 may have coupling protrusions 131a protruding in the upper and lower portions thereof, respectively. A pair of coupling protrusions 131a may be inserted into the first grooves 123a of the guide rib 123 as described above. That is, the driving unit body 131 may extend in the circumferential direction, and a space may be provided therein in the same shape and size as the guide rib 123. That is, the driving unit body 131 may have an internal space of an'H' shape extending in the circumferential direction therein. Accordingly, the guide rib 123 is inserted into the driving unit body 131, and the driving unit body 131 and the guide rib 123 are coupled by the coupling of the coupling protrusion 131a and the first groove 123a. Can keep.

In addition, the length of the drive body 131 may be longer than the length of the guide rib 123. Accordingly, when the guide rib 123 is inserted into the driving unit body 131, there may be a free space in which the guide rib 123 can move by a _{circumferential length X 3 in the driving unit body 131.} Accordingly, when the first gear member 132b moves in the circumferential direction through the second gear member 132b to be described later, the guide rib 123 may also move within the drive body 131. Here, the structure and shape of the driving unit body 131 are not limited thereto and may be various.

The driver 132 may be installed on the driving unit body 131 and connected to the first gear member 124. The driver 132 may include a power member 132a and a second gear member 132b connected to the first gear member 124.

The power member 132a serves to generate a driving force. For example, the power member 132a may be a motor and may generate rotational force. The power member 132a may be installed on the side of the driving unit body 131. In addition, the power member 132a may include a shaft. The shaft is formed of a cylindrical rod and may connect the power member 132a and the second gear member 132b. However, the position where the power member 132a is installed and the method of generating the driving force are not limited thereto and may be various.

The second gear member 132b may be connected to the first gear member 124 by having a shaft inserted at the center thereof. To this end, the second gear member 132b may have a hollow cylindrical shape in which gear teeth are formed on an outer circumferential surface. For example, the second gear member 132b may be formed as a pinion gear so as to be engaged with the first gear member 124. The second gear member 132b may receive a driving force from the power member 132a through the shaft, and may rotate in engagement with the first gear member 124 through the driving force. Thus, as described above, the first gear member 124 can be moved in the circumferential direction, and the connection part body 121 fixedly coupled to the first gear member 124 through the movement of the first gear member 124 ) Can be rotated.

The coupling plate 133 may prevent the guide rib 123 from being separated from the driving part body 131 when the connection part body 121 rotates. The coupling plate 133 is provided in a pair and may be coupled to both sides of the driving unit body 131, respectively. The coupling plate 133 may be formed in the shape of a thin plate of a rectangular parallelepiped. The coupling plate 133 may be coupled to the driving unit body 131 by bolts or welding. The structure and shape of the coupling plate 133 are not limited thereto and may be various.

The control unit 140 may include a plurality of measuring devices 141 capable of measuring the rotation angle of the connection unit 120 and a controller (not shown) that controls the operation of the driving unit 130.

The plurality of measuring devices 141 may be installed on the connection part 120, and at least one of the plurality of measuring devices may be disposed to face the driving unit body 131. The plurality of measuring devices 141 may be laser sensors, and may measure lengths in the circumferential direction from each position to the driving unit body 131. Here, the circumferential length may include a linear length from the measuring device 141 to the driving unit body. The plurality of measuring devices 141 may be disposed on the same line in the circumferential direction.

In the exemplary embodiment of the present invention, a case in which two measuring devices 141 are provided will be exemplarily described. In addition, a measuring device installed in a position adjacent to one end of the guide rib 123 is referred to as a first measuring device, and a measuring device installed in a position adjacent to the other end of the guide rib 123 is referred to as a second measuring device. That is, the first measuring device may be formed on the right side of the first slit 122a adjacent to one end, and the second measuring device may be formed on the right side of the first slit 122a adjacent to the other end. _{The length D 1} or D ₂ in the circumferential direction from at least one of the first measuring device or the second measuring device to the driving unit body 131 may be measured. That is, it is possible to measure _{the circumferential length D 1} or D ₂ from the single position to the driving unit body 131 using only the first measuring device or only the second measuring device. Alternatively, both the first measuring device and the second measuring device may be used to measure the circumferential lengths D ₁ and D ₂ to the driving unit body 131. When measuring the length in the circumferential direction at a single position, the controller can quickly calculate the measured value and quickly measure the rotation angle of the connecting body 121.

_{Here, the circumferential length D 1} or D ₂ from the first measuring device or the second measuring device to the driving part body 131 may be the length of the string. Accordingly, since the controller converts the circumferential length into a rotation angle, the degree of rotation of the connection body 121 and the second nozzle 2 coupled to the connection body 121 can be more accurately measured, and the second nozzle 2 ) And the coupling state of the first nozzle 1 can be more accurately determined.

In addition, it is possible to measure _{the circumferential lengths D 1} and D ₂ from the plurality of positions to the drive body 131 using the first measuring device and the second measuring device. In this case, since the measurement is performed at a plurality of positions, the error of the measurement value can be reduced. Accordingly, it is possible to more accurately measure the rotation angle of the connection body 121. Hereinafter, a case of measuring the rotation angle of the driving unit body 131 using the first measuring device and the second measuring device will be described as an example.

The controller may calculate the rotation angle of the connecting part body 121 of the driving part body 131 through the measured value measured by the first measuring device or the second measuring device. The rotation angle of the connecting body 121 may be calculated by converting the circumferential length measured by the first measuring device or the second measuring device into a rotation angle. Here, the controller may determine an angle at which the second body 111b is inserted and coupled to the second rib 122b as a fastening reference angle. _{That is, the controller may preset a rotation angle corresponding to the length L 4} in the width direction of the first slit 122a as a set value, and the rotation angle of the connection body 121 exceeds the rotation angle corresponding to the _{length L 4} Thus, when rotating, it can be determined that the connection body 121 is coupled to the coupling member 111. Accordingly, the controller may rotate the connecting portion body 121 in a range of a rotation angle corresponding _{to a circumferential length X 3} or less or a rotation angle corresponding to a length L _{4 or more.}

The manipulator 200 may grip the second nozzle 2 or the nozzle fastening device 100, and the manipulator 200 may grip the second nozzle 2 or the nozzle fastening device 100 and move toward the first nozzle 1 while holding the second nozzle 2 or the nozzle fastening device 100. Can be moved. The manipulator 200 may be a general configuration applied to a continuous casting facility, and there is no need to limit the manipulator to a specific configuration in describing an embodiment of the present invention. Therefore, a detailed description thereof will be omitted.

5 is a diagram illustrating a process of combining a first nozzle and a second nozzle according to an embodiment of the present invention. That is, Figure 5 (a) is a view showing a state in which the second nozzle is disposed under the first nozzle, Figure 5 (b) is a view showing a state in which the second body and the connecting body contact, and Figure 5 ( c) is a view showing that the second body is inserted into the first slit, and FIG. 5(d) is a view showing that the second body is inserted into the second slit.

A process of matching the central axis of the first nozzle 1 and the central axis of the second nozzle 2 will be described with reference to FIGS. 5(a) to 5(d).

Referring to FIG. 5(a), in a state in which the second nozzle 2 is inserted and coupled to the nozzle fastening device 100, the second nozzle 2 is moved to the lower side of the first nozzle 1 using the manipulator 200. Can be moved. Here, the second nozzle 2 and the connecting portion body 121 of the nozzle fastening device 100 may be coupled to each other while the central axis is aligned with each other.

With the manipulator 200 holding the drive body 131, the second nozzle 2 may be moved and disposed under the first nozzle 1. In arranging the second nozzle 2 under the first nozzle 1, the manipulator 200 is positioned at a position where the central axis of the second nozzle 2 coincides with the central axis of the first nozzle 1 Can be located. In this case, the coupling member 111 is in contact with the connection body 121 and the second nozzle 2 is not positioned and the first nozzle 1 and the central axis coincide with the first nozzle 1. Can be combined. On the other hand, in arranging the second nozzle 2, when the second nozzle 2 is disposed at a position where the central axis does not coincide with the first nozzle 1, the central axis of the second nozzle 2 is determined. 1 It is necessary to coincide with the central axis of the nozzle (1).

Referring to FIG. 5B, while moving the second nozzle 2 upward, the connection body 121 and the coupling member 111 may be brought into contact at three points. That is, the second bodies 111b may be brought into contact with the tapered upper portion of the first slit 122a from the connection body 121.

Referring to FIG. 5(c), when the second nozzle 2 is further moved upward while the second body 111b is in contact with the upper portion of the first slit 122a, the second body 111b is moved upward at each of the three points. (111b) is guided along the tapered surface of the first slit 122a, and the second body 111b can be inserted into the first slit 122a. In this case, the center of the second body 111b in the width direction and the center of the first slit 122a in the width direction may be matched. As described above, as the two circles can be positioned in three directions or three points to match the central axes of the two circles, at three points where the upper portions of the second bodies 111b and the first slit 122a are in contact. Each of the centers in the width direction of the second body 111b and the centers in the width direction of the first slit 122a may match the center axis of the second nozzle 2 and the center axis of the first nozzle 1. At this time, the second nozzle 2 may be moved upward and the second bodies 111b may be inserted to the ends of the first slit 122a, respectively.

Referring to FIG. 5D, the second nozzle 2 may be fixed to the first nozzle 1 in a state in which the central axes of the second nozzle 2 and the first nozzle 1 are aligned. That is, by rotating the connector body 121 by the driver 132, the connector body 121 and the coupling member 111 may be coupled. At this time, the driving unit body 131 may be in a state supported by the manipulator 200, and thus, the connection unit body 121 by the driving force of the actuator 132 while the manipulator 200 supports the driving unit body 131. ) And the second nozzle 2 can be rotated. That is, a driving force is generated from the power member 132a and transmitted to the second gear member 132b, and the second gear member 132b rotates while being engaged with the first gear member 124, and the connection body 121 Can be rotated. Accordingly, the second body 111b may be inserted to the end of the second slit 122b. Accordingly, the second body 111b can be fastened to the connection body 121 and the second nozzle 2 can be fixed to the first nozzle 1.

Hereinafter, a nozzle fastening method according to an embodiment of the present invention will be described.

The nozzle fastening method according to the embodiment of the present invention is a nozzle fastening method for fastening the second nozzle 2 to the first nozzle 1, and the second nozzle 2 is disposed under the first nozzle 1 The process of making (S110), the process of moving the second nozzle (2) toward the first nozzle (1) (S120), matching the central axis of the second nozzle (2) with the central axis of the first nozzle (1) A process S130 and a process S140 of rotating the second nozzle 2 and coupling it to the first nozzle 1 may be included.

6 is a flow chart showing a nozzle coupling method according to an embodiment of the present invention. Referring to Fig. 6, a method of fastening a nozzle of the present invention will be described.

First, the second nozzle 2 may be disposed under the first nozzle 1 by the manipulator 200 (S110). Thereafter, the second nozzle 2 may be moved toward the first nozzle 1 (S120).

More specifically, by moving the second nozzle 2 in the vertical direction, the connecting body 121 may be brought into contact with the coupling member 111. That is, it is possible to contact the connection body 121 and the second body 111b at three points. Accordingly, at three points, each of the second bodies 111b may be inserted into the first slit 122a along the tapered portion of the upper portion of the first slit 122a. At this time, the center in the width direction of the first slit (122a) and the center in the width direction of the second body (111b) can be matched, and the second nozzle (2) can be moved toward the central axis of the first nozzle (1). have. Accordingly, the central axis of the second nozzle 2 and the central axis of the first nozzle 1 may be matched (S130).

Thereafter, the first nozzle 1 may be coupled to the second nozzle 2 by rotating the connector body 121 through the driver 132 (S140). That is, the second body 111b may be inserted into the second slit 122b by rotating the connector body 121 with the driver 132 in a state inserted into the first slit 122a. Accordingly, the second body 111b may be hooked to the connection body 121 so that the vertical movement of the second body 111b is limited.

At this time, the coupling state of the second nozzle 2 to the first nozzle 1 may be inspected. That is, it can be checked whether the second body 111b is inserted into the second slit 122b through the measuring device 141. More specifically, the degree of rotation of the second nozzle 2 may be measured, and the measured measured value and a preset set value may be compared. Here, the degree of rotation of the second nozzle 2 may be an angle at which the second nozzle is rotated. _{In order to measure the degree of rotation of the second nozzle 2, the circumferential lengths D 1} and D ₂ from the reference point of the connection body 121 coupled with the second nozzle 2 to the drive body 131 are measured. I can. _{That is, the lengths D 1} and D ₂ in the circumferential direction to the driving unit body 131 may be measured with the first measuring device and the second measuring device. _{That is, the circumferential lengths D 1} and D ₂ from the first measuring device and the second measuring device to the driving unit body 131 are measured in real time, and the measured values can be transmitted to the controller. Here, as the connection part body 121 rotates in a counterclockwise direction, the circumferential length D ₁ from the first measuring device to the driving part body 131 can be measured to be gradually decreased, and the driving part body in the second immediate period _{The circumferential length D 2} up to (131) can be measured in increments of increments.

The controller can convert the transmitted measurements into rotation angles. Subsequently, the controller may compare the converted rotation angle with a preset set value. That is, the controller may compare the decrease amount of the value measured by the first measuring device with the set value, and may compare the increase amount of the value measured by the second measuring device with the set value. _{Here, the set value may be a rotation angle corresponding to a length L 4} or more in the width direction of the first slit 122a or a rotation angle corresponding to a length X ₁ or less in the circumferential direction of the second slit 122b. That is, if the measured value is _{a rotation angle corresponding to L 4} or less, the controller may determine that it is not coupled and continue to rotate the connector body 121. If the measured value is _{a rotation angle corresponding to the length L 4} or more, it can be determined that the second nozzle 2 is coupled to the first nozzle 1, and the controller controls the operation of the actuator 132 to control the connection part body. The rotation of 121 and the second nozzle 2 can be stopped.

Therefore, it is possible to check the coupling state of the first nozzle 1 and the second nozzle 2 through the controller, and thus the first nozzle ( Discharge of molten steel from 1) to the second nozzle 2 can be prevented. In addition, since the circumferential length from the plurality of positions to the driving unit body 131 is measured through the first measuring device and the second measuring device, the rotation angle of the driving unit body 131 can be more accurately measured than when measured at a single position. I can.

In this way, when the second nozzle 2 is fastened to the first nozzle 1, the central axis of the second nozzle 2 and the central axis of the first nozzle 1 may be matched. Accordingly, since the first nozzle 1 and the second nozzle 2 are connected while the central axes of the first nozzle 1 and the second nozzle 2 are aligned, the second nozzle 2 It is possible to prevent a gap between the 1 nozzle 1 and the second nozzle 2 from occurring. Therefore, it is possible to prevent the problem that the molten steel is re-oxidized due to air being mixed through the gap between the first nozzle 1 and the second nozzle 2, and the second nozzle 2 It is possible to prevent the occurrence of uneven melting loss of the nozzle 2.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined by the claims to be described below, as well as the claims and equivalents.

1: first nozzle 2: second nozzle
100: nozzle fastening device 110: fixing part
111: coupling member 120: connection
130: driving unit 140: control unit

Claims (17)

As a nozzle fastening device for fastening a second nozzle to the first nozzle,
A fixing part installed on the first nozzle;
A connection part that can be combined with the second nozzle, at least a part of which is in contact with the fixing part and is formed to be adjustable in position, and which can be combined with the fixing part; And
A nozzle fastening device comprising: a driving part connected to the connection part to rotate the connection part to couple or separate the connection part to the fixing part. The method according to claim 1,
The fixing part includes a coupling member extending vertically,
The connecting portion is a nozzle fastening device including a connecting portion body penetrating vertically and a guide slit formed on a side surface of the connecting portion body so as to be coupled with the coupling member. The method according to claim 2,
The coupling member and the guide slit are formed in three or more in the circumferential direction,
The plurality of coupling members are radially spaced apart from the central axis of the first nozzle and disposed parallel to the central axis of the first nozzle,
The plurality of guide slits are spaced apart from the central axis of the connecting portion body, and at least a portion thereof is disposed in parallel with the central axis of the connecting portion body. The method of claim 3,
The coupling member,
A first body extending vertically; And
Nozzle fastening device comprising a; a second body extending in the radial direction from the first body and insertable into the guide slit. The method according to claim 2,
The connection part,
The guide slit having one side extending in the vertical direction and the other side extending in the circumferential direction;
A guide rib installed on the side of the connecting body to be inserted into the driving unit; And
A nozzle fastening device comprising a; a first gear member connected to the driving unit and installed on a side surface of the connecting unit body. The method of claim 5,
The driving unit,
A driving unit body movably coupled to the guide rib;
A driver connected to the first gear member and installed on the driving unit body so as to move the driving unit body; And
Nozzle fastening device comprising a; coupling plate coupled to both sides of the drive body. The method of claim 6,
The driver,
A power member capable of generating a driving force; And
Nozzle fastening device comprising: a second gear member having one side rotatable in engagement with the first gear member and the other side rotatably installed on the power member. The method of claim 6,
The guide rib,
A first groove is formed inwardly recessed in the upper and lower surfaces and extending along the guide rib,
The driving unit body is a nozzle fastening device in which a coupling protrusion protruding inward is formed so as to be inserted into the first groove. The method of claim 4,
One side of the guide slit, a nozzle fastening device having a tapered or round shape at the end. The method according to any one of claims 1 to 9,
Nozzle fastening device further comprising a; a control unit for controlling the rotation angle of the connection portion. The method of claim 10,
The control unit,
A plurality of measuring devices installed on the connection part to measure the rotation angle of the connection part, and at least one of which may be disposed to face the driving part; And
A nozzle fastening device comprising: a controller connected to the measuring device and controlling the operation of the driving unit based on values measured by the plurality of measuring devices. As a nozzle fastening method for fastening a second nozzle to the first nozzle,
Disposing the second nozzle under the first nozzle;
Moving the second nozzle to face the first nozzle;
Matching the central axis of the second nozzle with the central axis of the first nozzle; And
Nozzle fastening device including; rotating the second nozzle and coupling it to the first nozzle. The method of claim 12,
The process of matching the central axis of the second nozzle with the central axis of the first nozzle,
Moving the second nozzle in a vertical direction to bring the connecting body coupled with the second nozzle into contact with a plurality of coupling members installed on the first nozzle; And
A nozzle fastening method comprising: inserting the coupling member into a guide slit formed on the connecting portion body at a plurality of positions to move the second nozzle toward a central axis of the first nozzle. The method of claim 13,
The process of rotating the second nozzle and coupling it to the first nozzle,
A nozzle fastening method comprising the step of rotating the connecting member body while the connecting member is inserted into the guide slit to hook and support the connecting member to the connecting member body. The method of claim 14,
The process of rotating the second nozzle and coupling it to the first nozzle,
Nozzle fastening method comprising the step of inspecting the coupling state of the second nozzle to the first nozzle. The method of claim 15,
The process of inspecting the coupling state of the second nozzle with the first nozzle,
Measuring the degree of rotation of the second nozzle and comparing the measured measurement value with a preset setting value; And
When the measured value is greater than or equal to a set value, determining that the second nozzle is coupled to the first nozzle. The method of claim 16,
The process of measuring the degree of rotation of the second nozzle,
Measuring a length in the circumferential direction from a reference point of the connecting portion body coupled with the second nozzle to a driver; And
Nozzle fastening method comprising; converting the length into a rotation angle.

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