JP5951887B2 - Segment for continuous casting machine - Google Patents

Description

  The present invention relates to a cooling device and a segment for a continuous casting machine including the same, and more specifically, a cooling device capable of effectively cooling a slab in response to a change in the width of the slab during continuous casting, and the same. To a segment for a continuous casting machine.

  In general, a continuous casting process is a continuous casting process in which molten steel is continuously poured into a mold having a predetermined shape, and a slab that has been semi-solidified in the mold is continuously drawn to the lower side of the mold. It is a process of manufacturing semi-finished products of various shapes such as billets (steel pieces).

  A general configuration of a normal continuous casting machine (hereinafter referred to as “continuous casting machine”) in which such a continuous casting process is performed and a segment disposed in the continuous casting machine will be described with reference to FIG. .

  In a typical continuous casting machine, molten steel is supplied via a ladle 10 in which molten steel refined in the steelmaking process is put, and an injection nozzle connected to the ladle 10, and a tundish that temporarily stores this. 20 and a mold 30 for receiving molten steel temporarily stored in the tundish 20 and initially solidifying the molten steel into a predetermined shape, and a series of forming operations while cooling the unsolidified slab S disposed under the mold 30. As is done, a cooling line 40 is provided in which a number of segments 50 are arranged in series. Here, the segment 50 is aligned so that a large number of rollers 52 and 54 are opposed to each other, and a large number of tie rods (not shown) for vertically connecting an upper frame 51 and a lower frame 53 spaced apart from each other, and a piston is a tie rod. In place of the upper frame 51 and the lower frame 53, the distance between the upper frame 51 and the lower frame 53 is adjusted to adjust the distance between the upper frame 51 and the lower frame 53. And a cooling device (not shown) for cooling the slab 1.

  The slab S that has passed through the mold 30 is pressed into a predetermined shape by being pressed by a large number of rollers 52 and 54 while passing through a separation space between the upper frame 51 and the lower frame 53. At this time, in the cooling device, cooling water is injected onto the slab S passing between the upper frame 51 and the lower frame 53 to cool it. The cooling device must maintain the same cooling level from narrow to wide to accommodate changes in the width of the slab. Therefore, in order to satisfy such a condition, a plurality of nozzles 56a and 56b are arranged in the width direction of the slab S as shown in FIG. The slab S was cooled while turning on / off the nozzles 56b disposed on the periphery of the slab S. However, such a method has many limitations such as complicated facilities such as piping as the number of nozzles increases, and as a result, it becomes difficult to perform maintenance. For this reason, a method of injecting cooling water while moving a nozzle having a wide injection angle according to the width of the slab has been proposed. In this method, since the driving means for moving the nozzle is disposed near the slab, there is a problem that deterioration and failure frequently occur due to heat generated from the slab and moisture due to cooling water.

  For this reason, a method of arranging the driving means outside the segment in order to suppress damage caused by heat and moisture has also been proposed. However, in this method, it is difficult to finely control the movement of the nozzle because the distance between the nozzle and the driving means is increased, and the nozzle becomes long and the vibration phenomenon of the nozzle due to the cooling water pressure occurs, resulting in damage. There was a problem that it was easy to be done.

The present invention provides a cooling device capable of easily adjusting a jet region of cooling water according to a change in the width of a slab and a segment for a continuous casting machine including the same.
The present invention provides a cooling device that can be accurately and stably controlled and a segment for a continuous casting machine including the same.

The present invention provides a cooling device capable of improving durability and a segment for a continuous casting machine including the same.
The present invention provides a cooling device capable of improving process efficiency and productivity, and a continuous casting machine segment including the same.

  The cooling device according to the embodiment of the present invention includes a driving unit that provides a rotational force, and a cooling water jet that is provided on each side of the driving unit and that includes at least one nozzle that jets the cooling water. And a moving unit disposed between the driving unit and each of the cooling water injection units to move each of the cooling water injection units symmetrically with each other.

  The cooling water ejecting section includes a head having a flow path formed therein, and a plurality of nozzles spaced from the head so as to communicate with the flow path.

  The moving means moves the cooling water ejecting portion in the vertical direction and the left and right direction, and the moving means is inclined such that a rotating shaft coupled to the driving means and one side is coupled to the cooling water ejecting section. And a motion converting means disposed between the rotating shaft and the rod, and converting the rotational motion of the rotating shaft into a linear motion to linearly move the rod.

The rotating shaft and the motion converting means may form a worm gear, and the motion converting means and the rod may form a rack gear.
The moving means may be housed in a housing and fixed to the driving means and the cooling water injection unit.
On the other side of the rod, a hollow guide member having an internal space formed so as to move the rod may be disposed, and the guide member may be fixed to the housing.

The driving means may be a servo motor.
The continuous casting machine segment according to the embodiment of the present invention includes an upper frame and a lower frame that are spaced apart from each other, and a plurality of segments disposed in the width direction of the slab. A segment for a continuous casting machine comprising a roller and a cooling device for injecting cooling water between the plurality of rollers, the driving means being respectively disposed in the center of the upper part of the upper frame and the lower frame, and the driving part A cooling water jetting unit disposed on each side of the cooling water jetting unit and at least one nozzle for jetting the cooling water, respectively, and disposed between the driving means and the cooling water jetting unit. Moving means for moving the injection unit symmetrically.

The cooling water injection unit includes a head in which a flow path is formed and is disposed in a longitudinal direction of the slab, and a plurality of nozzles that are separated from the head so as to communicate with the flow path. It may be.
The moving means may reciprocate the cooling water injection section in the width direction and the vertical direction of the slab.

The moving means includes a rotating shaft connected to the driving means, a rod connected on one side to the cooling water injection unit and inclined toward the inside of the segment, the rotating shaft and the rod And a motion conversion means for converting the rotary motion of the rotary shaft into a linear motion and moving the rod diagonally.
The driving means may be a servo motor.

  The cooling device according to the embodiment of the present invention and the segment for a continuous casting machine including the same can easily control the injection region of the cooling water corresponding to the change in the width of the slab continuously cast. Further, the distribution of the region where the cooling water is injected can be controlled symmetrically using one driving means. Furthermore, since the equipment is reduced in size and easy to maintain, process efficiency and productivity can be improved, and equipment costs and maintenance costs can be reduced.

It is a figure which shows the structure and segment of a normal continuous casting machine. It is a figure which shows the usage example of the cooling device arrange | positioned in the segment shown in FIG. It is a figure which shows the structure of the segment for continuous casting machines which concerns on embodiment of this invention. It is a perspective view of the cooling device shown in FIG. It is a front view of the cooling device shown in FIG. It is a figure which shows the use condition of the cooling device which concerns on embodiment of this invention. It is a figure which shows the use condition of the cooling device which concerns on embodiment of this invention.

  Hereinafter, preferred 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 disclosed below, but can be embodied in various different forms, which merely complete the disclosure of the present invention. It is provided to fully inform the scope of the invention to those skilled in the art to which the invention pertains. In the drawings, the same reference numerals indicate the same components.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
Prior to describing the configuration of the guide roller according to the embodiment of the present invention, the configuration of a normal continuous casting machine will be described.

  FIG. 3 is a view showing the structure of a segment for a continuous casting machine according to an embodiment of the present invention, and FIGS. 4 and 5 are a perspective view and a front view of the cooling device shown in FIG.

  Referring to FIG. 3, the segment includes an upper roller engagement body and a lower roller engagement body. The segment includes an upper frame 100 and a lower frame 102 that are separated from each other in the vertical direction, and a plurality of segments that are disposed on the upper frame 100 and the lower frame 102 and support a plurality of rollers that are disposed in the width direction of the slab S, respectively. A cooling device that injects cooling water between the girder plate 110 and the plurality of rollers 120 and 122 is provided. In addition, the segment includes a tie rod 140 that vertically connects the upper frame 100 and the lower frame 102 and a separation distance between the upper frame 100 and the lower frame 102 so as to apply a pressing force to the slab S. A hydraulic cylinder 130 for adjustment.

  The cooling device supplies cooling water to the center of the upper part of the upper frame 100 and the lower frame 102, more specifically, to the slab S provided on the girder plate 110 and conveyed between the upper frame 100 and the lower frame 102. Spray.

Referring to FIGS. 4 and 5, the cooling device includes a driving unit 210 that provides a rotational force to the girder plate 110, and at least one nozzle 224 that is disposed on each side of the driving unit 210 and into which cooling water is injected. The first and second cooling water injection units 220 and 220 ′ disposed respectively are connected to the driving means 210 so that the first and second cooling water injection units 220 and 220 ′ reciprocate diagonally. And a controller that controls the operation of the first and second moving means 230 and the driving means 210.
Each of the first and second cooling water injection units 220 and 220 ′ includes a head 222 in which a cooling water inlet to which cooling water is supplied is formed, and a flow path through which the cooling water moves is formed. And a plurality of nozzles 224 that are separated from the head 222 along the longitudinal direction of the slab S. The plurality of nozzles 224 are connected to the head so as to inject cooling water in the longitudinal direction of the slab S in the segment. The nozzles 224 disposed in the upper frame 100 are extended downward so that the plurality of nozzles 224 inject cooling water into the slab S passing between the upper frame 100 and the lower frame 102. The cooling water is jetted downward, and the nozzle 224 disposed in the lower frame 102 is formed to extend upward and jet the cooling water upward. At this time, the nozzle 224 may be formed in a slit shape so that the cooling water injection region is formed in the width direction of the slab S. Thus, by forming the plurality of nozzles 224 so as to communicate with the flow path formed in the head 222, the cooling water is supplied to each of the plurality of nozzles 224 more than the conventional case of supplying the cooling water. Equipment such as piping can be simplified.

  As the driving unit 210, various types such as a DC motor, a stepping motor, and an AC servo motor that rotate the rotating shaft 232 can be used. In particular, when an AC servo motor is used as the driving unit 210, the rotational speed can be finely adjusted, so that the moving distance of the cooling water injection units 220 and 220 'can also be accurately controlled. In the present invention, the moving distance of the pair of cooling water injection units 220 and 220 ′ that are symmetrically connected to the driving unit 210 is controlled by using one driving unit 210 that finely adjusts the rotation speed. For this reason, the pair of cooling water injection units 220 and 220 ′ are moved symmetrically by the same distance by the single driving unit 210. In addition, the driving means 210 is provided in the segment, the distance of the piping for supplying the cooling water to the cooling water injection units 220 and 220 ′ can be shortened, and the equipment can be simplified. Installation space can also be reduced.

  Each of the first and second moving means 230 includes a rotating shaft 232 connected to the driving means 210, a rod 236 connected to the head, and a motion converting means disposed between the rotating shaft 232 and the rod 236. And comprising. The first and second moving means 230 are accommodated in a housing 240 in which a space is formed, and are fixed to the driving means 210 and the first and second cooling water injection units 220 and 220 '.

  The rotating shaft 232 is connected to the driving unit 210 in the horizontal direction, and a screw is formed along the outer peripheral surface. At this time, the rotation shafts 232 connected to the first and second driving units 210 respectively have the screws formed in opposite directions to move the first and second cooling water injection units 220 and 220 ′ symmetrically with each other. . That is, since the first and second cooling water injection units 220 and 220 ′ are driven by one driving unit 210, a screw is formed on the rotating shaft 232 connected to the driving unit 210 in the opposite direction to each other. The 1st and 2nd cooling water injection parts 220 and 220 'arranged in the opposite direction can be moved symmetrically.

  The rod 236 is arranged on the same line in the vertical direction of the rotating shaft 232, and one side is connected to the head 222. Further, the rod 236 is arranged so that the other side is inclined toward the center of the segment while being connected to the head. A plurality of rods 236 may be connected so as to sufficiently support the cooling water injection units 220 and 220 '. The rod 236 has saw teeth on the outer peripheral surface along the longitudinal direction of the rod 236.

  The motion converting means is formed in an annular shape, and includes a wheel 234 on the outer peripheral surface of which a tooth of a saw that meshes with a screw of the rotating shaft 232 and a saw tooth of the rod 236 and a shaft 234 used as the rotating shaft. . The motion conversion means converts the rotary motion of the rotary shaft 232 into a linear motion and transmits it to the rod 236. For this reason, the rod 236 moves linearly using the rotational force provided from the driving means 210. At this time, the shaft 234 is disposed in a direction orthogonal to the rotation shaft 232 and is fixed to the inside of the housing 240 to be freely rotatable.

  Here, the rotating shaft 232 is a worm, the motion conversion means is used as a worm wheel to form a worm gear, and the motion conversion means and the rod 236 form a rack gear, whereby the rod 236 is formed by a combination of the worm gear and the rack gear. The first and second cooling water injection units 220 and 220 ′ are reciprocated in the width direction and the vertical direction of the slab S by linearly moving in the diagonal direction.

  The screw formed on the rotating shaft 232 and the saw teeth formed on the rod 236 and the motion converting unit are respectively rotated by the rotational force provided from the driving unit 210 to the first and second coolant injection units 220 and 220. It is preferable to form 'to move the same distance.

  On the other hand, a retractable protective member 237 is disposed on one outer peripheral surface of the rod 236 exposed from the housing 240, and the protective member 237 is fixed to the housing 240. The protection member 237 expands and contracts in response to the movement of the rod 236, prevents the rod 236 from being deteriorated by high heat and moisture, and reduces the impact generated while the rod 236 moves, thereby cooling the cooling water injection units 220 and 220. This prevents the connecting portion between 'and the rod 236 from being damaged. A guide member 238 is disposed on the other side of the rod 236. The guide member 238 is formed in a hollow cylindrical shape with one side open, and the rod 236 reciprocates inside the guide member 238. The guide member 238 is arranged to be inclined toward the center of the segment according to the arrangement shape of the rod 236 and is fixed to the housing 240.

  6 and 7 are diagrams illustrating a usage state of the cooling device according to the embodiment of the present invention. Here, the cooling device provided on the upper roller engaging body will be described. When the cooling device is provided on the lower roller engagement body, the ascending or descending direction of the cooling device is only reversed, and the driving principle is the same.

First, a case where a narrow slab S, for example, a slab S having a width of 200 mm, is manufactured by a continuous casting process will be described.
Referring to FIG. 6, when the driving unit 210 is operated under the control of the control unit, the rotating shaft 232 connected to the driving unit 210 rotates in one direction. Thereby, the motion converting means meshed with the rotating shaft 232 is rotated, and the rod 236 meshed with the motion converting means is moved into the guide member 238 by the rotation of the motion converting means. Thereby, the cooling water injection parts 220 and 220 ′ connected to the rod 236 move diagonally in the inner direction of the segment and descend toward the slab S. At this time, the cooling water injection units 220 and 220 ′ connected to both sides of the driving unit 210 move symmetrically over the same distance. As the distance between the nozzle 224 forming the cooling water injection units 220 and 220 ′ and the surface of the slab S approaches, the injection area of the cooling water injected through the nozzle 224 is reduced.

  On the other hand, when a wide slab S, for example, a 700 mm slab S is manufactured by a continuous casting process, the slab S is cooled by a process opposite to that for manufacturing a relatively narrow slab S. be able to.

  Referring to FIG. 7, the driving unit 210 is operated by the control of the control unit, and the rotating shaft 232 connected to the driving unit 210 is rotated in the opposite direction to the case where the narrow slab S is manufactured. For this reason, the motion converting means meshed with the rotating shaft 232 also rotates in accordance with the rotation direction of the rotating shaft 232, and the rod 236 meshed with the motion converting means is rotated outside the guide member 238 by the rotation of the motion converting means. Move to. Thereby, the cooling water injection parts 220 and 220 ′ connected to the rod 236 move diagonally in the outer direction of the segment and rise from the surface of the slab S. As a result, the distance between the nozzle 224 forming the cooling water injection portions 220 and 220 ′ and the surface of the slab S is increased, and the injection area of the cooling water injected through the nozzle 224 is increased.

Although the cooling device which concerns on embodiment of this invention is a cooling device arrange | positioned at the segment which comprises the continuous casting machine mentioned above, the technical thought is not limited to this at all.
As described above, specific embodiments have been described in the detailed description of the present invention, but it goes without saying that various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined only by the above-described embodiments, but should be defined not only by the claims described below, but also by the equivalents of the claims.

  The cooling device according to the present invention and the segment for a continuous casting machine including the same can easily control the cooling water injection region in response to a change in the width of a slab continuously cast by one driving means. it can.

  Thereby, compared with the past, facilities can be reduced in size and maintainability can be improved, and process efficiency and productivity can be improved. As a result, the industrial applicability of the present invention is improved.

Claims (7)

  Cooling water is sprayed between the plurality of rollers and the plurality of rollers disposed in the width direction of the slab, which are respectively disposed on the upper frame and the lower frame that are spaced apart from each other, and the upper frame and the lower frame. A segment for a continuous casting machine provided with a cooling device,
  Drive means respectively disposed in the center of the upper part of the upper frame and the lower frame;
  A cooling water ejecting section that is disposed on each side of the driving means and in which at least one nozzle that ejects cooling water is disposed;
  A moving means disposed between the driving means and the cooling water injection section to move the cooling water injection section symmetrically;
  With
  The moving means includes a rotating shaft having a screw formed on an outer peripheral surface connected to the driving means in a horizontal direction;
  A rod whose one side is connected to the cooling water injection part and is arranged to incline toward the inside of the segment, and a gear wheel is formed on the outer peripheral surface along the longitudinal direction;
  A motion converting means disposed between the rotating shaft and the rod, respectively, for converting the rotational motion of the rotating shaft into a linear motion and moving the rod diagonally;
  With
  The motion conversion means includes
  A plurality of wheels formed with gears that mesh with the screw of the rotating shaft and the gear of the rod;
  A shaft disposed in a direction perpendicular to the rotation axis and used as a rotation axis of the wheel;
  A segment for a continuous casting machine. The cooling water injection unit is
A flow path is formed inside, and the head is arranged in the longitudinal direction of the slab
A plurality of nozzles spaced from the head to communicate with the flow path ;
A segment for a continuous casting machine according to claim 1. It said moving means segment for continuous casting machine according to claim 1 for reciprocating the cooling water jetting portion in the width direction and the vertical Direction of the cast piece. The segment for a continuous casting machine according to claim 1, wherein the rotating shaft forms a worm gear, and the rod forms a rack gear . The continuous casting machine segment according to claim 1 , wherein the moving unit is housed in a housing and is fixed to the driving unit and the cooling water injection unit . 6. The continuous casting machine according to claim 5 , wherein a hollow guide member having an internal space formed so that the rod moves is disposed on the other side of the rod, and the guide member is fixed to the casing. Segment . The continuous casting machine segment according to claim 1 , wherein the driving means is a servo motor .

Images