KR100660198B1 - Reduction apparatus for continuous casting segment rolls - Google Patents

Abstract

The present invention relates to a reduction apparatus for a continuous casting segment roll.

In addition, the present invention is the sliding member 12a (12b) and the sliding member 12 is installed to move below the stand horizontal beam (B) in which the segment roll parts are disposed inside, the sliding member 12 is in contact with each other of the segment roll Reduction members 20a and 20b for performing reduction, the interval adjusting means 30a and 30b provided between the frame of the segment roll part, and the contacting portion of the reduction member and the gap adjusting means in contact with the sliding member. Provided is a reduction apparatus (1) for a continuous casting segment roll having an air spraying means (40) installed in the frames (F1) (F2) to prevent foreign substances from being caught.

Therefore, according to the reduction apparatus of the present invention as described above, the precision reduction operation of the segment roll part 0 in the mold is carried out so that the gap of the segment roll part of the segment roll part 0 is always kept constant, thereby bulging and breaking the cast. There is an excellent effect to prevent out phenomenon.

Continuous casting, cast steel manufacturing, segment roll section, segment roll no. 0, reduction device

Description

REDUCTION APPARATUS FOR CONTINUOUS CASTING SEGMENT ROLLS}             

1 is a schematic diagram showing a general playing process

Figure 2 is a schematic diagram showing the reduction operation of a typical continuous casting segment roll

3 (a) and 3 (b) are schematic front and perspective views showing a reduction apparatus of a conventional segment roll.

Figure 4 is a front view showing the operating state of the reduction apparatus equipped with a conventional segment roll

Figure 5 is an overall configuration showing a reduction apparatus of the play roll segment roll according to the present invention.

Figure 6 (a) and (b) is an operating state diagram and main part showing the air injection means of the reduction apparatus of the present invention process roll roll

Figure 7 is a schematic perspective view showing a reduction device of the present invention process roll roll

8 is a perspective view showing a horizontal beam of the reduction apparatus of the inventors of the continuous casting segment roll

9 (a) and (b) is a configuration diagram showing a state before and after the operation of the reduction apparatus of the present invention process roll roll.                 

Explanation of symbols on the main parts of the drawings

1 .... Reduction device 10 .... Driving means

12 .... sliding member 20 .... reduction member

30 .... Spacing means 40 .... Air injection means

42 .... Air spray nozzles B, B1 ... horizontal beam

F1, F2 .... Roll frame R1, R2 .... Segment roll

R1 ', R2' ... segment rolls S1, S2, S3

The present invention relates to an apparatus for reducing a slab at segment roll # 0 in a continuous casting machine, and more particularly, to a reduction plate and reduction at the time of reducing the slab as a segment roll # 0. Continuous casting to prevent the bulging phenomenon of the cast steel by minimizing the friction of the sliding plate between the frames and effectively preventing the lifting of the segment rolls, thereby maintaining the roll gap of the left and right segment rolls uniformly. It relates to a reduction device of the segment roll.

In general, the continuous casting process in a steel mill is injecting molten steel of the component adjustment completed through steelmaking and external refining into the mold to solidify the molten steel of the liquid through the sprinkling of coolant to ensure optimum quality. It is a continuous casting process to produce a bar-coil by manufacturing, and then cut the bar-rolls rolled by a rough rolling roller of the intermediate rolling mill to a certain length in the cutter.

Meanwhile, FIG. 1 illustrates such a general continuous casting process, the upper ladle 100 and the lower tundish 110 and the mold 120 installed under the tundish 110 to make a cast. In the mold 120, a plurality of rolls 130 for cooling, supporting, and guiding the slabs at the lower portion of the primary cooling device and the mold 120, and the slab 140 where the solidification proceeds from the surface to the center by spraying cooling water. The pinch roll 150 for drawing the roll, the intermediate rolling mill 160 for roughly rolling the cast steel 140, a cutter 170 for cutting the rolled bar cast steel, and a coil winding the bar cast steel with the bar coil 180. It consists of a ring device.

At this time, as shown in the main part of Figure 2, the molten steel (M) injected into the initial casting mold 120 is cooled by the primary cooling device to block the bottom of the bottom of the mold 120 to the operation of the pinch roll 150 When it is drawn by a dummy bar (not shown) moving by and reaches the lower end of segment rolls R1 and R2 of the plurality of segment rolls 130, the segment reduction apparatus 210 or 220 is operated to cast the slab ( Reduction of the 140, the segment rolls 130 of the lower portion is continuously cast while supporting and guiding the slab 140 to prevent bulging (Bulgging) by the positive pressure action of the non-solidified molten steel (M) therein. do.

By the way, in the production of the cast steel 140 by the reduction method as described above, while the high temperature cast steel 140 withdrawn from the mold 120 is solidified from the surface to the center, the inside of the cast steel 140 is solidified. By reducing the entire cast steel 140 to reduce the unsolidified molten steel (M) layer inside the cast steel 140, the inside of the cast steel 140 can shorten the length of the solidification process can shorten the length of the playing process equipment In order to prevent the center segregation, which is a quality defect caused by non-metallic inclusions being concentrated in the center while reducing the equipment cost, such a reduction apparatus of the conventional continuous casting segment roll is illustrated in FIGS. 3 and 4.

That is, as shown in Figures 3 and 4, when the hydraulic pressure is supplied to the cross (Close) side of the reduction cylinder 210, the reduction frame (mounted below the horizontal beam (B) installed between the vertical beam (S) ( 212 is formed by engaging two surfaces of the sliding plate 218 of both reduction frame 212 and the sliding plate 216 of segment roll part R1 'and R2' of the zero reduction frame 212 while rotating axially around the spring 214. While sliding, the frame F1 of the segment roll part R1 '0 is supported by the front and rear support shafts S1 and S2, and the frame F2 of the segment roll part R2' 0 is the rotation axis S3. While rotating about to adjust the roll gap detection value and the set value of the pulse generator built in the reduction cylinder 210 is adjusted to reduce the roll gap of the lower segment roll portion (R1 ') (R2') 0.

However, between two surfaces of the sliding plate 218 of the reduction frame 212 and the sliding plate 216 installed at the lower end of the segment roll part R1 '(R2') 0 during the reduction operation, the casting ( A scale generated at 140, fine iron pieces for cooling molten steel are attached, or frictional force generated between two surfaces as the sliding plate 218 (material: copper plate) made of copper plate of the reduction frame 212 is worn. Segment roll (R1) installed in segment roll part (R1 ') (R1') is increased as the number 0 segment roll portion (R1 ') (R2') is increased as much as the reduction cylinder 210 is increased by this increase Among the (R2), a problem arises that the arrangement state of the upper and lower segment rolls is distorted.

Accordingly, the support shafts S1 (S2) and S3 for supporting the frames F1 and F2 of the segment roll portions R1 'and R2' 0 and segment roll portions R1 'and R2', respectively. The gap is generated between the collectors (C) for supplying the secondary coolant to the secondary, and the secondary coolant leaks continuously, and is continuously drawn out from the mold 120 to prevent the secondary coolant from being sufficiently sprayed on the cast steel 140. Bulgging caused by the action of the iron static pressure of the molten steel (M) in the slab between the segment roll (R) that can not support the slab 140 due to the thinner (shell) of the 140 It is to bring about.

As a result, as the slab 120 is drawn out, the action of repeatedly pressing down the segment rolls R is repeated, thereby increasing the level of the molten steel surface in the mold 120 and lowering the non-metallic inclusions in the surface layer of the slab 140 that solidifies. Break-out of the solidification shell of the cast steel 140 due to the adsorption solidification to extremely degrade the quality of the product or to reduce the heat transfer properties of the cast steel 140 in the mold 120 as the larger non-metallic inclusions are mixed. (Break-Out) phenomenon occurs a large operation accident in which molten steel (M) is leaked into the facility, which causes a problem of lowering the continuous casting productivity.

The present invention has been made in order to solve the above problems, the object of the present invention is the phenomenon that the segment roll portion 0 is pushed upwards during the reduction work to reduce the slab passing through the segment roll portion 0 in the mold at the beginning of the continuous casting operation It is to provide a reduction apparatus of a continuous cast segment roll to prevent the bulging and break-out phenomenon of the slab by always keeping the gap of each segment roll of the segment roll portion 0 number to prevent.

As a technical configuration for achieving the above object, the present invention, the segment rolls through which the molten steel flowing into the mold through the ladle and tundish is installed so as to apply a predetermined reduction amount to the molten steel between the segment roll portion mounted to the frame. A reduction apparatus for continuous casting segment rolls, comprising: first and second sliding members installed to move as individual driving means below the stand horizontal beam having the segment roll parts disposed therein;

A first and second reduction members installed at a lower side of the frame of the segment part to be in contact with each other when the sliding member is moved, and at least one of which is formed with an inclined portion to prevent the segment roll part from being lifted;

First and second gap adjusting means installed between the frame of the segment roll part to adjust the gap of the segment roll part;

By providing a reduction apparatus of the continuous casting segment roll having an air injection means installed in the frame of the roll unit to prevent foreign matter from being caught in the contact portion of the reduction member and the gap adjusting means in contact with the sliding member.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is an overall configuration diagram showing a reduction device of the play process segment roll according to the present invention, Figure 6 (a) and (b) is an operation showing the air injection means of the reduction device of the present invention play process segment roll 7 is a schematic perspective view showing a reduction apparatus of the present invention process segment roll, and Figure 8 is a perspective view showing a horizontal beam of the reduction apparatus of the continuous casting segment roll of the present invention.

5 shows the overall configuration of the reduction apparatus 1 of the inventors of the continuous casting segment roll, the reduction apparatus 1 of the present invention such as the segment roll (R1) (R1) side 0 during the reduction operation largely On the frame (F1) (F2) of the segment roll portion (R1 ') (R2') mounted with the sliding member (12) and the segment roll (R1) (R2) to be in contact with the moving sliding member (12) A spacing means for finely adjusting the spacing between the frames F1 and F2 as a liner L to reduce the spacing between the frames, that is, the lower spacing of the segment rolls; 30), and in addition, air spraying means 40 is installed between each contacting portion to be described in detail below to prevent foreign substances, ie, inclusions in the coolant or continuous scales, from being caught during continuous casting. , Each of these members and means When the detailed description that follows.

First, looking at the segment roll portion of the continuous casting machine in which the reduction apparatus 1 according to the present invention is installed, a plurality of segment rolls through which the molten steel (M) flowing into the mold of the continuous casting machine passes through the ladle and the tundish, in particular, 0 times. The segment rolls R1 and R2 are mounted to the frames F1 and F2, and segment roll portions R1 'and R2' on one side and the other are called inside and outside segment roll portions, and the reduction according to the present invention. The operation is to maintain a constant interval between the phase segment rolls (R1) (R2) to apply a constant reduction amount to the molten steel.

On the other hand, the frame (F1) of the one side segment roll portion (R1 ') is connected to a pair of support shafts (S1) (S2) supported by the mounting portion installed in the other horizontal beam (B1) of the stand, the other segment roll portion ( The frame F2 of R2 'is connected to the frame F1 as a support shaft S3, so that the frames of the respective segment roll portions R1' and R2 'shaft the upper support shaft S3. They are narrowed or spaced apart from each other, and the interval between the segment rolls R1 and R2 can be adjusted.

Next, FIGS. 7 and 8 together with FIG. 5 illustrate the first and second sliding members 12a and 12b described above in detail. Such first and second sliding members 12a and 12b are illustrated in FIG. As shown in FIG. 4, unlike the sliding plate 218 operated as one reduction cylinder 210, it is connected to each driving means 10, and the first and second sliding members 12a and 12b are The segment roll portions R1 'and R2' are provided to move as individual driving means 10a and 10b below the stand S horizontal beam B in which the segment roll portions R1 'and R2' are disposed.

As shown in FIGS. 7 and 8, the individual driving means 10 are mounted in fixed blocks 14a and 14b fixed to the lower sides of the horizontal beams B on both sides of the stand S. 1 and 2 reduction cylinders 10a and 10b, the first sliding member 12a is a sliding roll installed at the rod end of the first cylinder 10a, and the second sliding member 12b is It is made of sliding plate.

Next, as shown in FIG. 5, the reduction member 30 includes two first and second reduction members 30a mounted below the frames F1 and F2 of the segment roll parts R1 ′ and R2 ′. The reduction member 30 is a straight path in which the first and second sliding members 12a and 12b move as the first and second reduction cylinders 10a and 10b. The reduction members 20a and 20b are compressed by the sliding roll 12a, which is a first sliding member, and the sliding plate 12b, which is a second sliding member. Adjust the interval between (F2).

At this time, it is important that as described in the problems of the prior art, as shown in FIG. It is preferable that the inclined portion 20a 'is formed in at least one of the sliding members 20a and 20b.

That is, the first and second reduction members 20a and 20b are plates fixed to the outside of the frames F1 and F2, and the first reduction plate 20a is a sliding roll which is the first sliding member. 12a) is installed below the frame F2 of the segment roll portion R2 'to be in contact with each other when the movement of the 12a), and the inclined portion 20a' for preventing the above-described segment roll portion from being lifted by the first reduction plate 20a. Is formed.

In addition, the second reduction plate 20b is mounted under the frame F1 of the segment roll part R1 ′ to be in contact with the movement of the second sliding plate 12b.

Next, in FIGS. 5 and 6, the interval adjusting means for finely adjusting the gap between the segment roll portions which are not present in the conventional reduction apparatus, that is, the gap between the lower rolls of the segment rolls R1 and R2, 0 at the time of reduction operation. 30 is shown.

That is, the interval adjusting means 30 is the first and the second interval adjusting means (30a) (30b) are installed to face each other inside the frame (F1) (F2) of the segment roll portion (R1 ') (R2'). 6 is schematically illustrated, but the gap adjusting means 30 includes body parts 32a and 32b fixed to the frame and guide parts 34a and 34b on which a liner L for fine adjustment is mounted. ) Is formed.

Then, the front end portion of the body portion 32a of the first gap adjusting means 30a mounted on the frame F2 of the one side segment roll part R2 'is formed in an arc shape, and thus the body 32a and 32b of the gap adjusting means. Initialize the contact between them.

Although the gap adjusting means 30 is schematically illustrated in FIG. 6, the body parts 32 of the gap adjusting means 30 actually move finely forward when the liner L is inserted into the guide part 34. It is structured to be able to do it.

Next, as shown in Figure 5 and Figure 6, in the present invention is provided with an air injection means 40 that is not conventionally installed, such air injection means 40 by the sliding member 12 and its movement The high pressure air is injected to prevent the foreign matter described as a conventional problem from being caught between the abutting reduction member 20 and the gap adjusting means 30.                     

In addition, the air injection means 40 of the bracket 44 installed in each of the frame (F1) (F2) above the contact portion of the sliding member 12, the reduction member 20, and the gap adjusting means 30. It is made of a configuration having an air spray nozzle 42 is fixed to the lower portion for injecting air.

Referring to the operation of the present invention made in the above configuration in more detail as follows.

Figure 9 (a) and (b) is a configuration diagram showing the state before and after the operation of the reduction device of the continuous shareholder process segment rolls of the present invention, the molten steel of the segment roll (R) is cooled and passed for the first time In order to perform a reduction operation for maintaining the gap between the segment rolls R1 and R2, in particular, the lower segment rolls, which directly affect the shape and quality of the cast steel, first, the air spray nozzle of the air injection means 40 Through 42, the high pressure air is injected.

Therefore, as will be described in detail below, foreign matters generated during the reduction operation are prevented from being caught between the sliding member 12, the reduction member 20, and the gap adjusting member 30, thereby reducing the precision reduction of the segment rolls. Make it possible.

On the other hand, when the first and second reduction cylinders 10a and 10b mounted on the fixed blocks 14a and 14b under the horizontal beam B of both stands S are operated, the first fixed to the rod is connected. The sliding roll 12a, which is a sliding member, moves forward, and at the same time, the sliding plate 12b, which is a second sliding member, moves forward.                     

Therefore, the sliding roll 12a is in close contact with the inclined portion 20a 'of the first reduction plate 20a mounted on the lower periphery of the frames F1 and F2, and the second reduction plate 20b on the opposite side is in close contact. The sliding plate 12b is in close contact with each other, and thus, each of the frames F1 and F2 is narrowed with respect to the axis of the upper support shaft S3, and segment 0 stone R1 (R2) (R2) installed in the frames is arranged. In particular, the interval between the segment rolls R1 and R2 at the lower end is kept constant. Although not shown in the drawing, a predetermined movement width controls the reduction cylinders 10 through a control unit. will be.

At this time, it is important that the sliding roll 12a, which is the first sliding member, is in close contact with the inclined portion 20a 'of the first reduction plate 20a. Various problems occurring while being heard are prevented in advance, which in turn prevents bulging and break-out due to poor solidification by maintaining a constant interval during initial solidification of molten steel by segment rolls 0.

On the other hand, in addition to the movement of the first and second reduction cylinders (10a) (10b), the interval adjusting means 30 for finely adjusting the interval of the segment roll is provided.

That is, the interval adjusting means 30 is the first and the second interval adjusting means (30a) (30b) are installed to face each other inside the frame (F1) (F2) of the segment roll portion (R1 ') (R2'). It is made by the operator, each of the interval adjusting means 30 by inserting the liner (L) having a fine thickness in the guide portion (34a, 34b) of the body portion (32a) 32b fixed to the frame (F1) Finely adjust the interval between (F2).                     

At this time, the body portion 32a of the first spacing adjusting means 30a mounted on the frame F2 of the one side segment roll portion R2 'is formed in an arc shape, and thus the body 32a of the spacing adjusting means. Initializes the contact portion between the 32b, which reduces the damage between the gap adjusting means 30.

Accordingly, according to the reduction apparatus 1 of the present invention, the frame F1 (F2) is conventionally prevented from being lifted up by the sliding plate which abuts each other, and in the case of the continuous casting process in which the casting is cast into slabs by solidification of molten steel By preventing the thinning of the molten steel shell, break-out phenomenon caused by the bulging phenomenon and damage to the molten steel shell is also prevented, thereby improving the quality of the cast steel. It can be done.

As described above, according to the reduction apparatus of the continuous casting segment roll of the present invention, the segment roll portion of the reduction apparatus for maintaining the roll gap of the segment roll is prevented from being lifted up during the reduction operation, so that the roll gap of the lower portion of the segment roll portion of the 0 segment roll is always constant. There is an advantage that can be maintained.

Accordingly, the separation between the segment rolls and the leakage of the cooling water is prevented, thereby preventing bulging and break-out due to the solidification failure of the cast steel and the damage of the solidification shell, thereby providing a more improved cast steel, in particular, continuous casting process It enables the high speed work of the product and provides the effect of improving the productivity of continuous casting work.                     

Furthermore, by injecting air into the sliding plate contact portion of the reduction apparatus, foreign matters affecting the lower roll cap of the segment roll portion due to the reduction operation of the actual cast can be effectively removed beforehand, thereby improving the operability of the reduction apparatus. There is.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (5)

The segment rolls R1 and R2 through which the molten steel M introduced into the mold through the ladle and the tundish pass through the molten steel between the segment roll portions R1 'and R2' mounted on the frames F1 and F2. In the reduction apparatus (1) of a continuous casting segment roll provided to apply a predetermined reduction amount, The first and second sliding members 12a and 12b installed to move as the individual driving means 10a and 10b below the stand S horizontal beams B in which the segment roll parts are disposed inward. First and second reduction members 20a and 20b which are installed on the lower side of the frame of the segment part to be in contact with each other when the sliding member 12 moves, and at least one of which is inclined to prevent the segment roll part from being lifted. ;Wow, First and second gap adjusting means (30a, 30b) installed between the frame of the segment roll part to adjust the gap of the segment roll part; And, Continuous injection molding means characterized in that it comprises an air spraying means 40 which is installed on the frame (F1) (F2) of the roll part to prevent foreign matter caught in the contact portion of the reduction member and the gap adjusting means in contact with the sliding member. Reduction device of segment roll The first and second cylinders (10a) according to claim 1, wherein the individual drive means (10) are mounted in fixed blocks (14a) and (14b) fixed below both horizontal beams (B) of the stand (S). 10b), and the first and second sliding members 12a and 12b are formed of a sliding roll and a sliding plate installed at the rod end of the first cylinder 10a. Reduction Device The frame of the segment roll part (R1 ') (R2') of claim 1, wherein the first and second reduction members (20a, 20b) are in contact with each other when the first and second sliding members (12a, 12b) move. (F1) and each of the reduction plates installed below the F2, Reduction apparatus for the continuous casting segment roll, characterized in that the inclined portion (20a ') is formed in the first reduction plate (20a) to prevent the segment roll portion is lifted. According to claim 1, wherein the first and second spacing adjusting means (30a, 30b) is installed on the frame (F1) (F2) of the segment roll portion to face each other at the lower end, the respective spacing adjusting means (30) Reduction device for a continuous casting segment roll, characterized in that the interval adjusting liner (L) is fitted The bracket of claim 1, wherein the air spraying means (40) is installed on each of the frames (F1) and (F2) above the contact portion of the sliding member (12), the reduction member (20), and the gap adjusting means (30). Reduction device for a continuous casting segment roll, characterized in that it is provided in the lower portion of the 44, the air injection nozzle 42 for injecting air

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