KR100775323B1 - A device for opening the gap in segment of continuous casting process - Google Patents

Abstract

The present invention relates to an apparatus for opening a gap of a segment during a continuous casting operation in a continuous casting facility.

The present invention cast roll by lowering the upper frame 141 against the upper and lower frames 141 and 142 and the lower frame 142 is fixed to the casting roll 103 is installed on the corresponding surface facing each other In a facility for continuously casting a plurality of segments having a clamping cylinder 105 for generating a reduction force to reduce the gap between the 103 to cast the cast pieces forcibly drawn from the mold 110, the lower frame ( Removably mounted on the 142, the cylinder housing 11 through which the rod end 105a of the clamping cylinder 105 connected to the upper frame 141, and the up and down flow in the cylinder housing 11 A spring member which is accommodated in the plunger 15 and possibly in the cylinder housing 11 so as to elastically support the plunger 15 upwardly so as to open a gap between the casting rolls 103 when an abnormality of the hydraulic system occurs. Training notes, including 17) In the event of an accident in which the casting operation is interrupted due to an abnormality of the hydraulic system during the middle of the tank, the casting is opened so that the casting can be quickly and safely drawn out without stagnation between the casting rolls.

Continuous casting, segment, gap, casting roll, spring member

Description

Segment Gap Opening Device of Continuous Casting Equipment {A DEVICE FOR OPENING THE GAP IN SEGMENT OF CONTINUOUS CASTING PROCESS}

1 is a schematic view showing a typical continuous casting equipment,

Figure 2 is a perspective view showing a segment employed in the continuous casting facility according to the prior art,

3 is an operational state diagram showing a segment employed in the continuous casting facility according to the prior art,

Figure 4 is an external view showing a segment gap opening device of the continuous casting plant according to the present invention,

5 is an exploded perspective view showing a segment gap opening device of the continuous casting plant according to the present invention,

6 is an operational state diagram showing a segment gap opening device of the continuous casting plant according to the present invention,

Figure 7 is a schematic diagram showing a continuous casting plant employing a segment according to the present invention.

        Explanation of symbols on the main parts of the drawings

11 .... cylinder housing 12 .... inner cylinder

13 .... Guide Bush 14 .... Contact Plate

15 .... Plunger 16a, 16b ... O-ring

17 .... spring member 110 .... mold

103 ... casting rolls 141,142 ... upper and lower frames

The present invention relates to an apparatus for opening a gap of a segment during a continuous casting operation in a continuous casting facility, and more particularly, due to an abnormality of a hydraulic system during an operation of continuously casting a cast piece by soft reduction in a continuous casting process. In the event of an accident in which the casting operation is interrupted due to the inability to operate, the present invention relates to a segment gap opening device of a continuous casting facility, which is capable of quickly and safely withdrawing casts without stagnation between casting rolls.

In general, the continuous casting operation in the mill mill mill of the steel mill, as shown in Figure 1, in the initial stage of drawing the cast steel to the lower side of the mold 110 supplied with molten steel, all equipment of the machine is the same as the mold 110 Casting process is carried out with a gap (Gap) to determine the thickness of the cast, the post-process of the mold 110 has a plurality of casting rolls 103, the gap reduction cylinder 104 and the clamping cylinder 105 The first, second, third, fourth, fifth, and sixth segments 121, 122, 123, 124, 125, and 126 are continuously disposed in the cast steel casting direction.

2 and 3, the segment is provided on the upper and lower frames 141 and 142 and the upper frame 141, in which the casting rolls 103 are installed correspondingly to face each other. The plurality of clamping cylinders 105 mounted on the lower frame 142 and the rod front end 15 of the cylinder 105 pass through the rod end so that the rod end is connected through the pin member 145. The spacer cylinder 115 in which the plunger 117 is built is provided.

2 and 3, reference numeral 116 denotes a hose member for supplying and discharging fluid into the spacer cylinder 115, and 106 is a hose for supplying fluid to the manifold block 106 connected to the clamping cylinder 105. It is absent.

Accordingly, when the slab head of the hot state forcedly drawn from the mold 110 having long and short sides passes through the lower end of the first segment 121, a gap attached to the lower end by a preset control value. By the reduction operation of the reduction cylinder 104, a soft reduction in which the first segment 121 withdraws is made, and a plurality of guide casting rolls 103 mounted on the first segment 121 are formed. The upper and lower surfaces of the slab are pressed to gradually reduce the thickness of the slab, and the shape of the slab becomes a wedge when viewed from the side.

In addition, when the slab head part is pulled out of the second segment 122 adjacent to the first segment 121, the hose member may be attached to the clamping cylinder 105 at the inlet and outlet sides attached to the segment by a preset control value. 107 is supplied with hydraulic pressure, wherein a spacer cylinder 116 which maintains a gap between the upper and lower casting rolls 103, which is a gap of a facility, is a control valve in a valve stand (not shown). As it opens, the hydraulic pressure is released and the plunger 117 is lowered.

At this time, the clamping cylinder 105 in which the rod end is reduced (falling) is operated by pulling the upper frame 141 with respect to the fixed lower frame 142 so that the gap is reduced and the same gap size as the cast strip thickness to be reduced. The remaining segments 123, 124 and 125 also sequentially shrink the gap between the upper and lower casting rolls 103 in the same manner as described above, and the gap is reduced in continuous casting. It remains until the end of work.

However, the clamping cylinder 105 and the spacer cylinder 115 which are opened and closed to widen and narrow the gap related to the thickness of the cast steel are hydraulic cylinders that use hydraulic pressure so as to transmit stable pressing force to the cast steel during the casting of the cast steel. Since the hydraulic system is abnormal during the casting operation, and the hydraulic pump (not shown) that delivers the hydraulic pressure to the cylinders 105 and 115 is stopped or the pressure of the hydraulic system is low, the clamping cylinder 105 A large amount of hydraulic oil leaks due to the rupture of the attached hose member 106.

As a result, when the hydraulic system is stopped, the continuous casting operation is automatically performed to protect the equipment and prevent secondary accidents because the segments continuously arranged in the casting direction from the mold cannot guide and support the cast pieces in one direction. Depending on the program being interrupted, continuous casting is interrupted.

As such, when the casting operation is stopped due to the hydraulic abnormality, the segments of the player maintains the state in which the upper frame 141 is lowered as it is, the hot cast between the upper and lower frames 141, 142 as it is In this state, if the slabs sandwiched between the casting rolls are forcibly pulled out, uncast solid molten steel in the slabs overflows to the top, causing a secondary accident by attaching the current to the facility. Withdrawal of cast iron in municipal facilities becomes impossible.

Therefore, the operation of withdrawing the cast during interruption of casting according to the abnormality of the conventional hydraulic system, first sprinkle the cooling water on the cast to solidify it first, and when the cooling of the cast is completed, the hydraulic abnormality of the plurality of segments installed in the performance equipment is generated After finding the location and repairing it, the hydraulic system was restarted normally and the stagnant casts in the performance were withdrawn.

However, when the cast piece 8 stagnated in the installation is curdled to bend along the arrangement of the installation, it is impossible to pull out the cast piece in the casting direction, so it must be taken out in the opposite direction of the casting.

That is, the method of withdrawing the cast in the casting reverse direction is to cut the cast between the first segment 121 and the second segment 122 with an oxygen cutter when the cooling of the cast is completed, the mold 110 and the first The two segments 122 are lifted off by the crane, and the cast pieces between the fifth segment 125 and the sixth segment 126 are also cut with an oxygen cutter, thereby pulling the cast pieces in the sixth segment 126 downward. The curved slats contained in the second, third, fourth, and fifth segments 122, 123, 124, and 125 are mounted on the segments to drive pinch rolls (not shown) having rotational power. After drawing to the top, the hook work was performed with a crane, and the withdrawn cast pieces were cut into 2 to 3 equal parts with an oxygen cutter to a suitable length.

Accordingly, when the casting is interrupted in the prior art, the work taken out between the casting rolls 103 of the segment and the work of restoring the casting facility after drawing out takes a lot of work productivity, and the cast iron hangs and cuts into an oxygen cutting machine. There was a problem that can cause a safety accident of the worker during the cutting process.

Therefore, the present invention has been proposed in order to solve the conventional problems as described above, the object of which is that the casting operation becomes impossible while the operation of the segment is impossible because of the hydraulic system during the casting of the cast by soft reduction in the continuous casting process. In the event of an interruption, it is necessary to provide a segment gap opening device of a continuous casting facility that can quickly and safely withdraw the castings without stagnation between the casting rolls.

As a technical configuration for achieving the above object, the present invention,

A plurality of segments having an upper and lower frame having casting rolls installed on corresponding surfaces facing each other, and a clamping cylinder which generates a pressing force to lower the gap between the casting rolls by lowering the upper frame with respect to the fixed lower frame. In the arrangement for continuously casting the cast steel drawn from the mold by continuously placing the,

A cylinder housing detachably installed on the lower frame, through which a rod end of the clamping cylinder connected to the upper frame passes, a plunger assembled up and down in the cylinder housing, and hydraulically received in the cylinder housing And a spring member for elastically supporting the plunger upward to open the gap between the casting rolls in the event of an abnormality of the system.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Figure 4 is an external view showing a segment gap opening device of the continuous casting equipment according to the present invention, Figure 5 is an exploded perspective view showing a segment gap opening device of the continuous casting equipment according to the present invention, Figure 6 Fig. 7 is a schematic view showing the operation of the segment gap opening device of the continuous casting apparatus according to the present invention. Fig. 7 is a schematic diagram showing the continuous casting apparatus employing the segment according to the present invention.

The apparatus 1 of the present invention, as shown in Figures 4 to 7, the upper and lower frames 141, 142 and the position where the casting roll 103 is rotatably installed on the corresponding surface facing each other, respectively, and the position A plurality of segments 121, 122, 123, 124, 125 and 126 having a clamping cylinder 103 having a rod end connected to lower the upper frame 141 with respect to the fixed lower frame 142. ) Is continuously disposed on the lower side of the mold 110 to continuously pass the cast steel drawn from the lower portion of the mold 110 between the casting roll 103 of the segment to cast the cast steel, continuous Gap between the casting rolls 103 to safely and quickly withdraw cast slabs sandwiched between the casting rolls 103 in the event of an abnormality in the hydraulic system generating a pressing force for lowering and operating the upper frame 141 during the casting operation. By opening the cylinder housing (11), the plunger 15, the spring member 17 and the like.

That is, the cylinder housing 11 is a cylindrical member detachably assembled as a plurality of screw members 142a on the lower frame 142, and the upper frame 141 and the connecting pin 145 are disposed in an inner space. An inner cylinder 12 having a central hole 12a through which the rod end 105 of the clamping cylinder 105 is formed, at the end of which the crab 105b connected via a medium is formed.

In addition, the male screw portion 13a of the guide bush member 13 is formed on the inner circumferential surface of the upper end of the cylinder housing 11 to guide the up and down flow of the plunger 15 so that external detachment from the cylinder housing 11 is difficult. An inlet hole 11a to which a female screw portion 11b to be screwed is formed, and a hose member 116 to supply a fluid pressure to raise the plunger 15 assembled in the inner space as a hydraulic force on the outer surface of the body ) Is penetrating.

In addition, the plunger 15 is a movable member disposed in the cylinder housing 11 so as to be movable up and down in the guide bush 13 screwed to the upper end of the cylinder housing 11, such a plunger 15. Is formed through the central hole (15a) is inserted into the inner cylinder 12 in the center of the body, the locking flange portion 15b having an outer diameter larger than the outer diameter of the body to be caught by the lower end of the guide bush (13) ) At the lower end.

In addition, the upper surface of the plunger 15 is detachably assembled as a plurality of screw members (14a) contact plate 14 in contact with the lower surface of the pressing plate 118 of the upper frame 141, the center of the body The through hole 14b is penetrated so that the rod end of the clamping cylinder 105 can pass therethrough.

On the other hand, the spring member 17 is disposed in the inner space of the cylinder housing 11 so as to support the plunger 15 in an upward direction, and is fitted to the inner cylinder 12. Accordingly, the gap between the casting rolls 103 of the upper and lower frames 141 and 142 constituting the segments arranged continuously on the lower side of the mold 110 is fixed during the process of continuously casting the cast pieces. It provides hydraulic pressure to the clamping cylinder 105 side that provides a pressing force for lowering the upper frame 141 against the lower frame 142, and the plunger 15 through the inlet hole (11a) of the cylinder housing 11 When an abnormality occurs in the hydraulic system that provides hydraulic pressure for forcibly raising the gap, the gap between the casting rolls 103 is forcibly opened by a spring member 17 that elastically supports the plunger 15 upward. Will be able to easily and safely withdraw the cast between the casting roll 103 to the outside.

In addition, sealing o-rings 16a and 16b are assembled on inner and outer circumferential surfaces of the guide bush 13 so as to prevent the outflow of hydraulic oil supplied into the cylinder housing 11, respectively. The sealing O-ring 16b is also provided on the outer circumferential surface.

The operation and effects of the present invention having the configuration as described above will be described.

First, the continuous casting operation at the beginning is equal to the interval between the casting rolls 103 of the first segment 121 disposed directly below the mold 110 to which molten steel was initially supplied. In such a state, when the head part of the slab solidified in the mold 110 and forcedly drawn out is passed through the lower part of the first segment 121, the mold is pre-set by a program of a predetermined casting facility. The gap reduction cylinder 104 of the one segment 121 is operated to descend.

Subsequently, when the upper casting roll 103 of the first segment 121 presses the cast steel by the lowering operation of the cylinder 104, the thickness of the cast steel is reduced by a predetermined amount, the first segment 121 The cast steel shape inside the wedge is wedge-shaped when viewed from the side.

In addition, when the slab whose plate thickness is reduced in the first segment 121 enters between the casting rolls 103 of the second segment 122, the second segment 122 also has a lower frame (B) according to a preset control value. At the same time the hydraulic pressure is being supplied through the hose member 116 connected to the inflow hole 11a of the cylinder housing 11 installed on the 142, the hydraulic system is connected to the upper frame 141 with respect to the lower frame 142. The clamping cylinder 105 is operated to descend.

In this case, the pressing plate 118 mounted on the lower surface of the upper frame 141 is pressed against the contact plate 14 of the plunger 15 assembled to the cylinder housing 11 by the pressing force of the clamping cylinder 105. In contact with the lower side, the plunger 15 assembled in the cylinder housing 11 so as to flow up and down is lowered, and the hydraulic pressure in the cylinder housing 11 is discharged through the inlet hole 11a. At this time, the spring member 17 which is elastically supporting the plunger 15 upward in the cylinder housing 11 is reduced to have elastic restoring force by the plunger 15 which is lowered.

Then, the gap between the casting rolls 105 is maintained by the lowering of the plunger 15 to maintain the thickness of the slab 8, and this process is carried out when the slab passes through the sixth segment 126. If the gap between the casting rolls 103 is reduced to equal the thickness of the slab, all the clamping cylinder 105 generates a uniform pressing force in the hydraulic system by a control value. Hydraulic pressure is supplied to lower the rod end 105a connected to the upper frame 141 so that the state is maintained until the casting is completed.

On the other hand, as described above through the plurality of segments (1021, 122, 123, 124, 125, 126) of the slab forcedly drawn to the lower portion of the mold 110, casting a cast piece having a predetermined thickness continuously In the process, if an abnormality occurs in the hydraulic system that generates a pressing force for pressing the slab or the hydraulic oil is leaked to stop the hydraulic system abnormally, by the lowering operation of the clamping cylinder 105 of the cylinder housing 11 Since the spring member 17 that has been contracted in the inner space is freed by the release of the pressing force caused by the abnormality of the hydraulic system, the elastic member of the spring member 17 is elastically supported to support the plunger 15 upwardly. do.

In this case, the contact plate 14 of the plunger 15 pushed upward and the pressing plate 118 of the upper frame 141 are interviewed with each other while the upper frame 141 by the elastic restoring force of the spring member 17. ) To the upper portion, which maintains an open state where the gap between the casting roll 103 of the upper frame 141 and the casting roll 103 of the lower frame 142 is sufficiently widened. When the casting stops due to the abnormality, the casting rolls 103 can be easily and quickly pulled out to the bottom without the congestion of the cast pieces.

In addition, the unsolidified molten steel inside the slab is torn as the unsolidified slab surface is torn while passing the plurality of segments 122, 123, 124, 125, and 126 that are hot inside the casting. When the hydraulic pressure that flows out and damages the hose members 116 and 107 to generate a reduction force is dropped, when the hydraulic system stops due to leakage of a large amount of hydraulic oil, the spring member 17 accommodated and contracted in the cylinder housing 17 At the same time as the release of the pressing force, the plunger 150 is elastically supported upward as above, and the gap between the casting rolls is automatically opened in the event of an abnormality of the hydraulic system to prevent the accident of smelting of cast steel and equipment inside the equipment. You can do it.

According to the present invention as described above, the continuous hydraulic work is stopped by abnormality of the hydraulic system for operation supplied to the clamping cylinder side of the segment to reduce the gap between the casting rolls or the hydraulic system is stopped due to rupture of the hydraulic hose. When the upper frame is lifted from the lower frame by the elastic restoring force of the spring member, which is freed, the gap between the casting rolls is automatically opened so that the cast pieces are caught between the casting rolls under the condition that the hydraulic system is not operated. Withdraw the cast normally to the outside without the need to cut and withdraw the cast as in the prior art, the work of repairing the equipment is unnecessary, the maintenance time can be shortened to improve the work productivity, and the safety of the workers that can be generated during the equipment repair operation The effect of preventing accidents is obtained.

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 clarify that knowledge is easy to know.

Claims (3)

Casting roll 103 by lowering the upper frame 141 with respect to the upper and lower frames 141 and 142 and the fixed lower frame 142, the casting roll 103 is installed on the corresponding surface facing each other In a facility for continuously casting a plurality of segments having a clamping cylinder 105 for generating a reduction force to reduce the gap between the casting casts forcibly drawn from the mold 110, A cylinder housing 11 detachably installed on the lower frame 142, through which a rod end 105 a of the clamping cylinder 105 connected to the upper frame 141 passes, and the cylinder housing 11 ) The plunger 15 which is assembled in a vertical flowable manner within the cylinder and the cylinder housing 11 to support the plunger 15 upwardly so as to open the gap between the casting rolls 103 when an abnormality occurs in the hydraulic system. Segment gap opening device of a continuous casting equipment, characterized in that it comprises a spring member (17). The method of claim 1, The male threaded portion 13a of the guide bush member 13 is screwed to the upper inner circumferential surface of the cylinder housing 11 so as to guide the up and down flow of the plunger 15 so that it is difficult to detach from the cylinder housing 11. Segment gap opening device of a continuous casting facility, characterized in that the female threaded portion (11b) is formed. The method of claim 2, The upper surface of the plunger 15 is detachably assembled with a plurality of screw members (14a) contact plate 14 in contact with the lower surface of the pressing plate 118 of the upper frame 141, the body center is the clamping Segment gap opening device of the continuous casting equipment, characterized in that the through hole (14b) is penetrated so that the rod end of the cylinder (105) can pass.

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