KR200334815Y1 - Compulsory opening hole device of laddle - Google Patents

Abstract

The present invention relates to a ladle forced opening device which is used to open a ladle by melting molten steel solidified in the ladle during a continuous casting operation, more specifically, to enable a quick and safe opening work when forcibly opening the ladle In that,

The present invention does not open even when the ladle is open, when forced to open the ladle when the molten steel in the ladle can not be injected into the tundish,

A lift unit rotatably coupled to the tundish car, the lift unit being fixed to the tundish at the time of opening work to raise or lower the lifting rod in a predetermined direction;

A coupling part which is rotatably supported by the bearing at regular intervals from the lifting part, and wherein the oxygen pipe is detachably coupled;

Rotating elevating rod for raising or lowering the rotating elevating rod so that the engaging portion can be raised and lowered by a constant angle forward and reverse by a connecting member connecting the elevating portion and the engaging portion between the elevating portion and the engaging portion. Contains wealth.

Description

Ladle forced opening device {COMPULSORY OPENING HOLE DEVICE OF LADDLE}

The present invention relates to a ladle forced opening device which is used to open a ladle by melting molten steel solidified in the ladle during a continuous casting operation, and more particularly, to provide a quick and safe opening work when a ladle is forcibly opened. A ladle forced opening device.

In general, continuous casting operation refers to a process in which molten steel refined in a steelmaking process is cooled by a machine to make slabs, slabs, blooms, billets, and the like.

In this continuous casting process, the molten steel refined in the steelmaking process is taken to the ladle (LADLE) and then transferred to the performance factory, and the transferred ladle is seated on the ladle turret (LADLE TURRET) to rotate and start casting.

Here, the molten steel received in the ladle is injected into the tundish by opening the collect nozzle in the cassette, which is preheated to about 1200 ° C. before casting, and the storage and distribution of the molten steel as well as the separation portion of the non-metallic inclusions. Play a role.

When the molten steel injected into the tundish is filled in a predetermined amount, the molten steel is adjusted by opening and closing the tundish stopper, and the playing process is performed in the order in which the molten steel is injected into the mold and cooled.

As such, the continuous casting operation is started by opening the sliding nozzle of the ladle cassette installed under the ladle to inject molten steel into the lower tundish.

That is, when the gate 320a of the ladle 300 is opened by operating the motor 340 as shown in FIG. 1, the pillar 310 is dropped and the molten steel and the pillar solidification layer 350 are opened by self-pressure. It is injected into the tundish 200.

At this time, even when the gate 320a of the ladle 300 is opened, when the molten steel in the ladle 300 cannot be injected into the tundish 200 because it is not naturally open, a method of forcibly opening the ladle is performed. It is done.

As shown in FIG. 2, according to the conventional ladle forced opening method, the worker attaches the oxygen pipe 100 to the oxygen holder 260 from the upper portion of the tundish cover 200a to ignite the tip of the oxygen pipe 100 with a large torch. Since the molten steel and the pillar solidified layer 350 is melted and forcibly opened, the molten steel may be burned and the worker is always exposed to backfired oxygen, and work efficiency is reduced.

In addition, in the related art, the operator attaches the oxygen pipe 100 to the oxygen holder 260 and directly blows oxygen, so that the weight of the oxygen pipe has to be reduced. This leads to an increase in the number of oxygen blows due to shortening of the combustion time of the oxygen pipe, and thus, a case in which a high heat dust is present has to be blown two to three times or five to six times.

Therefore, the present invention is designed to solve the above problems, and the object of the present invention is to make the ladle forced opening work remotely, to promote the safety of the ladle forced opening workers and to reduce the number of oxygen injection times, thereby improving work efficiency and quality. To contribute to.

1 is a schematic cross-sectional view showing an opening state of a ladle according to the prior art.

Figure 2 is a schematic cross-sectional view showing a forced opening operation state of the ladle according to the prior art.

3 is a partial exploded perspective view showing the ladle forced opening factory according to the present invention.

Figure 4 is a perspective view showing a coupled state of the ladle forced opening device according to the present invention.

Figure 5 is an exploded perspective view of the main portion of the ladle forced opening device according to the present invention.

Figure 6 is a cross-sectional view showing an operating state of the ladle forced opening device according to the present invention.

7 is a cross-sectional view showing a mounting state of the ladle forced opening device according to the present invention.

Explanation of symbols on the main parts of the drawings

10: elevating unit 11: elevating rod 12: lower fixed shaft

12a: bolt 13: upper fixing part 14: hinge

15: fixing ring 16: fastening member 16a: groove

17: locking member 18: holder 20: coupling portion

21: bearing 22: coupling hole 23: keyway

24: round 25: coupling groove 26: coupling member

30: lifting lifting part 31: connecting member 32: lifting lifting rod

33: support member 34: bolt 35: bearing

36,37: Ring 40: Control panel 41: Lifting lever

42: rotary operation lever 50: sleeve 51: valve

52: oxygen supply hose 53: coupling 200: tundish

200C: Tundish Car 200a: Tundish Cover 300: Ladle

310: pillar 3 20: collector nozzle 320a: gate

340: motor

In order to achieve the above object, the present invention, in the case of opening the ladle does not open the hole in the ladle when the molten steel in the ladle can not be injected into the tundish,

A lift unit rotatably coupled to the tundish car, the lift unit being fixed to the tundish at the time of opening work to raise or lower the lifting rod in a predetermined direction;

A coupling part which is rotatably supported by the bearing at regular intervals from the lifting part, and wherein the oxygen pipe is detachably coupled;

It is coupled between the elevating portion and the coupling portion includes a rotary lifting portion for raising or lowering the rotary lifting rod to allow the coupling portion to be raised, lowered in the forward and reverse directions by a predetermined angle.

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

Figure 3 is a partially exploded perspective view showing the ladle forced opening factory according to the present invention, Figure 4 is a perspective view showing a combined state of the ladle forced opening device according to the present invention, Figure 5 is a ladle forced opening device according to the present invention The dissection disassembled perspective view of the main part.

When the ladle forced opening according to the present invention does not open a natural opening even when opening the gator 320a of the ladle 300 by operating the motor 340, the molten steel in the ladle 300 cannot be injected into the tundish 200. It is for remotely performing the ladle forced opening work.

This ladle forced opening factory is composed of a lifting unit 10, the coupling unit 20, the rotating unit 30, the operation lever 40 and the like.

The lifting unit 10 is rotatably coupled to the tundish car (200C) and is kept fixed to the tundish (200) during the opening work, the lifting rod 11 is raised or lowered in a predetermined direction Let it be.

The lifting unit 10 is coupled by a bolt 12a or the like so as to be rotatable at any angle about the lower fixed shaft 12 fixed to the tundish car 200C, the lifting unit 10 of the The upper part is fixed to the tundish 200 by the upper fixing part 13 fixed to the tundish 200.

The upper fixing part 13 is rotatably coupled around the hinge 14 fixed to the tundish 200 to tighten the fixing member 15 fixed to the upper part of the elevating part 10. (16); It consists of a locking member 17 for fixing the fixing ring 15 in the tightened state by the tightening member 16.

The fastening member 16 is provided with a plurality of grooves 16a to flow while corresponding to the play of the tundish 200 is seated.

And the tundish car 200C is provided with a cradle 18 for seating the lifting unit 10 during non-casting.

Therefore, the elevating unit 10 is fixed at the upper fixing part 13 by rotating the elevating unit 10 about the lower fixing shaft 12 during casting, that is, during the forced opening of the ladle 300. , When not in operation, the lifting unit 10 is rotated about the lower fixed shaft 12 to be seated on the holder 18.

The coupling part 20 is supported by the bearing 21 so as to be freely rotated at regular intervals with the lifting part 10, and the oxygen pipe 100 is detachably coupled.

Inside the coupling portion 20 of the oxygen pipe 100 to be fixed to the coupling hole 22 and the oxygen pipe 100 to be coupled to the coupling hole for the oxygen pipe 100 is coupled to the coupling hole (20) The key groove 23 for forming the key 110 is formed.

The coupling hole 22 prevents the oxygen pipe 100 from moving further by the key 110 of the oxygen pipe 100 so that the length of the front and rear ends of the oxygen pipe 100 is always constant.

In addition, a round 24 is formed at a predetermined portion of the coupling hole 22 so that the tip of the oxygen pipe is directly coupled without being caught when the oxygen pipe 100 is coupled.

The rotating lifting unit 30 is connected to at least one or more between the lifting unit 10 and the coupling unit 20 and supports the coupling unit 20 to be lifted and lowered by the lifting unit 10. The member 31 raises or lowers the rotary lifting rod 32 so that the coupling part 20 can be rotated up and down in a constant angle forward and reverse directions.

The rotating lifting unit 30 is coupled to the support member 33 and the bolt 34 and the like to be supported by the support member 33 so as to prevent play during operation of the lifting unit 10,

The support member 33 is coupled to the lifting rod 11 so that the coupling portion 20 can be arbitrarily rotated by the bearing 35.

The connecting member 31 has heat resistance that can withstand high temperatures, and when the rotary lifting rod 32 is raised or lowered, the connecting member 31 is fixed together with the coupling part 20 to determine the coupling part 20. , It has the flexibility to be arbitrarily unwound or wound on the coupling portion to rotate at a constant angle, for example 180 degrees in the reverse direction.

The connection member 31 is directly connected to the coupling portion 20 and the support member 33, or connected to the ring 36, 37 formed in the coupling portion 20 and the support member 33, respectively, as shown in FIG. Can be.

The bearing 21 is easily separated or coupled to the coupling groove 25 of the lifting elevating rod 32 for rotation so that the coupling portion 20 or the lifting elevating portion 30 can be easily repaired or replaced. Coupling member 26 is coupled to.

The operation unit 40 is an elevating operation lever 41 for operating the elevating rod 11 of the elevating unit 10 or the elevating rod 32 for rotation of the elevating elevating unit 30. ) And a rotation operation lever 42.

The elevating operation lever 41 or the rotary operation lever 42 may be connected by a wireless method so that the elevating unit 10 or the elevating unit 30 for rotation may be wired or remotely controlled.

In addition, the elevating operation lever 41 and the rotary operation lever 42 are adjacent to each other side by side so that the operator can operate with both hands, so that the operation and rotation of the oxygen pipe 100 can be operated simultaneously. Will be.

The tip 50 of the oxygen pipe 100 is attached to the sleeve 50, which is easy to ignite at a constant temperature (for example, 1200 ℃), the sleeve is a constant temperature, such as when moving into the tundish by the lifting or lowering of the lifting portion It is composed of charcoal or sawdust to be easily ignited in the tundish 200 is preheated to 1200 ℃.

The oxygen pipe 100 is controlled by a valve 51 and detachably coupled to the oxygen pipe 100 by an oxygen supply hose 52 and a coupling 53 for supplying oxygen to the oxygen pipe 100.

Accordingly, during the non-casting, the lifting portion of the ladle forced opening device is normally placed on the cradle 18 fixed to the tundish car 200C as shown in FIG. 7, thus preventing the tundish 200 from being replaced or other operations. Will not give.

In this state, when the tundish 200 finishes the inspection and comes to the casting position by the tundish car 200C, the operator rotates the elevating unit 10 about the lower fixed shaft in the cradle 18 to raise the elevating unit 10. After the fixing ring 15 is positioned at right angles to the groove 16a of the upper fixing part 13, the fixing ring 15 is tightened with the fastening member 16, and then fixed with the locking member 17 as shown in FIG. Let it be.

In addition, the oxygen pipe 100 with the sleeve 50 attached thereto is coupled to the coupling hole 22 of the coupling part 20, and the key 110 of the oxygen pipe 100 is coupled to the key groove 23 and then oxygen. When the coupling 53 is fastened to the pipe 100, the work preparation of the ladle forced opening device is completed.

When the natural opening does not occur even when the gate 320a is opened by operating the motor 340, the worker grasps the coupling 53 and moves the tip of the oxygen pipe 100 to the upper and lower bearings 35. Rotate in a constant direction by operating the elevating operation lever 41 in the upper portion of the tundish 200 preheated to 1200 ℃ by operating the elevating unit 10, the sleeve is turned as shown by the dashed line in Figure 6 The sleeve 50 is ignited while being positioned inside the dish.

As described above, when the sleeve 50 is ignited and the rotary lifting lever 30 is operated by operating the rotary operation lever 42, the coupling part 20 is raised and the coupling part 20 and the connection member 31 are operated. While rotating by the sleeve 50 is positioned below the collector nozzle 320 as shown in the solid line of FIG.

At this time, the elevating rod 11 is operated by operating the elevating operation lever 41 to raise the elevating rod 11 by a predetermined length so that the sleeve 50 contacts the molten steel and the pillar solidification layer 350. The valve 51 is opened to blow oxygen into the oxygen pipe 100.

Then, the sleeve 50 and the oxygen pipe 100 are heated to a high temperature while the collector nozzle 320 is combusted so that the ladle 300 is forcibly opened.

In addition, if the lifting rod 11 of the lifting unit 10 is repeatedly raised and lowered by continuously operating the lifting operation lever 41 during the forced ladle opening operation, the forced opening effect is increased within a short time.

When the ladle 300 is forcibly opened as described above, the oxygen pipe 100 is melted by molten steel. At this time, the operator grasps the coupling 53 and forces the ladle by the upper bearing 35 of the elevating part 10. After rotating the oxygen pipe 100 is separated.

When the continuous casting operation is completed, the locking member 17 of the upper fixing part 13 is released, and then the lifting unit 10 is rotated about the lower fixing shaft 12 to make the tundish car 200C as shown in FIG. 7. When seated on the cradle 18 in the ladle forced opening factory is in the state of normal non-casting.

As described above, the ladle forced opening of the present invention enables the operator to remotely work at a position far from the gate of the ladle, thereby improving worker safety and improving work efficiency.

In addition, since the operator does not have to directly inject oxygen into the oxygen pipe, the oxygen pipe can be weighted, and the opening time of the ladle is shortened, thereby preventing the fall of the preheating temperature of the tundish and stabilizing the initial casting work. To improve the quality by preventing and minimizing the drop in the molten steel level.

Claims (2)

The lower end is rotatably coupled to the tundish car, and when it is not in operation, it is seated on the cradle installed in the tundish, and during operation, it is maintained vertically to the tundish to lift or lower the cylinder type to raise or lower the lifting rod installed at the top. Wealth; A fastening member rotatably coupled to the tundish by a hinge to fasten the fixing ring fixed to the upper part of the elevating unit, and a locking member for fixing the fastening state of the fastening member to secure the elevating unit vertically. Upper fixation; A coupling part of a pipe shape, which is arbitrarily rotated by a bearing at regular intervals from the elevating part, and in which an oxygen pipe is detachably coupled to the inside; A cylinder-shaped rotary lifting unit installed between the support member installed on the elevating rod of the elevating unit and the bearing of the coupling unit for elevating the coupling unit; Ladle forced opening device including a connecting member connected to the support member and the upper coupling portion to rotate the engaging portion at a predetermined angle when the lifting and lowering for the lifting. According to claim 1, Ladder forced opening device further comprises an operation unit for controlling the lifting unit or the lifting elevating unit by wire or wireless so as to elevate the elevating rod of the elevating unit or the rotating elevating rod of the rotating elevating unit, respectively. .