KR100862523B1 - A filler pack to be inserted into the tap hole of the ladle and an apparatus for inserting it - Google Patents

Abstract

The present invention provides a filler pack for sealing the barrel nozzle provided in the tapping hole of the molten steel ladle, and a device for inserting a filler pack in which a filler sealing the tap hole of the molten steel ladle is packaged in a disposable unit into the barrel nozzle provided at the tapping hole. The present invention relates to a filler pack comprising a hollow body of a compressed paper material having an outer diameter corresponding to an inner diameter of a barrel nozzle and having a hollow portion in which a filler is accommodated, wherein an outer surface of the main body is coated with a waterproof film. The filler pack inserting device includes a cylindrical housing having an accommodating space for accommodating the filler pack, an open top, propulsion means for pushing the filler pack accommodated in the accommodating space to an open upper portion, and a filler pack accommodated in the accommodating space in the barrel nozzle. It consists of an attachment means for attaching the open upper part of the cylindrical housing to the outer surface of the tap so as to coincide. The lupa pack can be easily inserted into the exit of the molten steel ladle.

Hollow body, propulsion means, cylindrical housing, electromagnet

Description

A filler pack to be inserted into the tap hole of the ladle and an apparatus for inserting it}             

1 shows a typical molten steel ladle;

2 is a view showing a working state of filling a ladle tap with a filler according to a conventional embodiment;

3 is a view showing a working state for refilling a filler according to a conventional embodiment;

4 is a view of a filler pack according to the present invention;

5 is a sectional view of a filler pack according to the present invention;

6 is a cross-sectional view of the filler pack insertion apparatus according to the present invention;

7a to 7c show the components of the propulsion device constituting the filler pack insertion apparatus according to the present invention;

8a to 8c is a view showing the operating state of the filler pack inserting apparatus according to the present invention;

9 is a view showing an operating state of the filler pack inserting apparatus attached to the outer surface of the molten steel ladle according to the present invention;

10 is a view showing a state in which the filler pack inserting device is attached to the outer surface of the molten steel ladle.

<Description of Symbols for Major Parts of Drawings>

1: molten steel ladle

5: sliding nozzle

20, 21: Filler Pack

23: cutting line

24: waterproof membrane

30: Filler pack insertion device

31: electromagnet

32: cylindrical housing

41: cylindrical piston

51: screw piston

55: piston shaft

61: guider piston

65: drive motor

The present invention relates to a filler pack and a filler pack inserting device inserted into a molten steel ladle outlet, and more specifically, through a sliding nozzle provided at a lower end of a filler pack and a molten steel ladle packed with a filler so as to be used as a disposable unit. The present invention relates to a filler pack insertion device for inserting a filler pack so as to close the tap hole.

In general, the molten steel ladle is a container for tapping into the tundish of the continuous casting machine after receiving and refining the molten steel from the converter. Referring to FIG. 1, a tub nozzle 2, an inner plate 3, an outer plate 4, and a sliding nozzle 5 may flow out of a tap hole formed at the bottom of the molten steel ladle 1. Is provided. The flow rate of the molten steel which flows out from the molten steel ladle 1 through the sliding nozzle 5 is adjusted according to the horizontal movement amount of the outer plate 4, ie, the opening and closing degree of the tap opening according to the operation of the sliding nozzle 5.

On the other hand, the tapping port is filled with a filler of the silicon component (SiO ₂ ) or a chromium component (Cr ₂ O ₃ ) in order to prevent accidental leakage of molten steel due to the melting loss of the tapping hole. This filler filling operation is performed in a state where the exit port is closed by the operation of the outer plate 4 and the sliding nozzle 5 after the sliding nozzle 5 is replaced. That is, referring to FIG. 2, the filler feeder 11 including the filler supply hopper 12 is operated to the upper portion of the molten steel ladle 1 standing upright. In order to inject the filler into the outlet, the guide rod 13 provided at the lower part of the hopper 12 is lowered to coincide with the top of the outlet barrel nozzle 2, and then the filler of the hopper 12 is guided along the guide rod 13. To about 60 kg drop to fill the filler in the barrel nozzle (2).

In this way, the molten steel is taken in the ladle 1 in a state where the tap hole is closed by the filler. In addition, when the steel plate is opened by operating the outer plate 4 and the sliding nozzle 5 in order to tap the received molten steel in tundish, the filler filled in the tap hole is discharged first, and then the molten steel is discharged.

On the other hand, in the filler injection as described above, the replacement worktable of the sliding nozzle (5) is located on the ground and the filler feeder (11) is located at a height of about 11m, so the operator's copper wire is long, the filling operation is delayed, which is the molten steel ladle It is the cause of process waiting in (1).

In the filler input operation, the filler is randomly input by the operator's experience, and the filler waste is increased and the filler must be injected from the upper part of the hot molten steel ladle, so the working environment is poor, so expect the responsible work such as checking the dryness of the filler. It is difficult.

In addition, since the filler is transported in a packing unit of about 500kg from the manufacturer and stored at the work site, there is a high risk of moisture penetrating into the filler. In this case, when a filler containing a lot of moisture is not picked up by the operator and put into the entrance of the molten steel ladle, the filler is not discharged even when the sliding nozzle 5 is opened in the continuous casting machine (not shown), so that the molten steel is not pulled out. It acts as a cause of failure. At this time, the oxygen washing operation is performed to open the tap. However, if the tap opening is not opened even by the oxygen washing operation, the molten steel is returned and retreated in the converter.

As shown in FIG. 3, when the filler 18 on the ground is reeled up by using the hook 18 of the overhead crane 19, the filler is replenished to the hopper 12 of the filler dosing machine 11. (7) is continuously exposed to dust of heavy metals such as silicon (Si) and chromium (Cr), and there is a risk of heavy metal poisoning. In addition, since the filler injector 11 is installed to protrude in the main work section of the overhead crane 19, the overhead crane has to be operated in a zigzag state in which loads such as the molten steel ladle 1 are hoisted, and thus the transportation time is delayed. There was also a risk of equipment accidents such as collisions.

The present invention has been made to solve the conventional problems as described above, it is an object of the present invention to provide a filler pack waterproof packing the filler in a single use unit to easily close the exit of the molten steel ladle.

In addition, another object of the present invention is to reduce the process waiting time of the molten steel ladle due to the delay of the repair work by simplifying the filler input operation, to prevent waste of the injected filler, due to the poor opening of the tap opening due to moisture inflow In order to prevent these cases from being returned, to improve the working environment such as preventing heavy metal poisoning of workers, and to prevent the risk of equipment accidents, the replacement of the sliding nozzles at the same time as the replacement of the sliding nozzles is completed. It is to provide a filler pack inserter that can be inserted back into the.

In order to achieve the above object, according to the present invention, the filler pack for sealing the barrel nozzle provided in the tapping hole of the molten steel ladle has an outer diameter corresponding to the inner diameter of the barrel nozzle and has a hollow portion in which the filler is accommodated It is made of a hollow body, characterized in that the waterproof film is coated on the outer surface of the body.

In addition, according to the present invention, the device for inserting the filler pack in which the filler to seal the exit of the molten steel ladle in the disposable unit is provided in the barrel nozzle provided in the exit has an upper space containing the filler pack is accommodated The cylindrical housing, which is open, propulsion means for pushing the filler pack accommodated in the accommodation space to the open upper portion, and an open upper portion of the cylindrical housing so that the filler pack accommodated in the accommodation space coincides with the barrel nozzle. Characterized in that the attachment means for attaching to the outer surface.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

The filler pack 21 according to the present invention has a hollow body 25 that can be inserted into a tap hole of the molten steel ladle 1. The hollow body 25 is made of a combustible compressed paper material, the outer surface is coated with a waterproof film (24). The hollow part of the hollow body 25 is filled with Si-based fillers and / or Cr-based fillers depending on the type of steel received in the molten steel ladle 1. Referring to FIG. 5, although the filler pack 21 in which the Si-based filler 27 and the Cr-based filler 26 are filled in the hollow portion of the main body 25 is illustrated, the Si-based filler 27 may vary depending on the steel type. ) Or Cr-based filler 26 may be filled in the hollow portion.

The hollow body 25 has a conical structure at the top thereof and is open to allow the fillers 26 and 27 to be filled so that the hollow body 25 can be easily inserted into the outlet of the molten steel ladle 1. The open lower part of the hollow body 25 is closed by a stopper 22. Reference numeral 23 denotes a cutting line that can be cut by the operation of the sliding nozzle 5 provided on the lower outer surface of the tap in the state that the filler pack 21 is inserted into the tap of the molten steel ladle (1).

As described above, since the fillers 26 and / or 27 for sealing the tap hole by the filler pack 21 are packaged in a disposable unit, it is possible to prevent the wasteless waste of the filler.

Hereinafter, the filler pack inserting apparatus 30 for inserting the filler pack 20 in which the filler is packaged in a disposable unit into the tap hole of the molten steel ladle 1 will be described.

Filler pack inserting device 30 according to the present invention is a cylindrical housing 32 having a receiving space in which the filler pack 20 is accommodated, propelled to be mounted on the cylindrical housing 32 to push the filler pack 20 forward Means and an attachment means for attaching the open top of the cylindrical housing 32 to the outer surface of the exit of the molten steel ladle 1.

The cylindrical housing 32 has a receiving space into which the filler pack 20 can be inserted and has an open end. A handle 33 is provided on the outer side of the cylindrical housing 32. An electromagnet switch 35 for driving the electromagnet 31 described below and a motor switch 34 for driving the drive motor are provided adjacent to the handle 33. The inner surface of the accommodating space of the cylindrical housing 32 is provided with an inner screw 39 of a trapezoidal structure machined in a spiral shape along the circumferential surface, and a guide groove 38 machined in a straight line along the axial direction.

The pushing means is provided in the accommodation space of the cylindrical housing 32. The propulsion means has a screw piston 51 in which an outer thread engaged with the inner thread 39 is machined on the outer surface. The piston shaft 55 is provided at the upper end of the screw piston 51, the piston shaft 55 is coupled to the cylindrical piston 41 having a seating surface on which the lower portion of the filler pack 20 accommodated in the receiving space is seated. A drive motor 65 is coupled to the lower portion of the threaded piston 51, and the drive motor 65 is attached to the rear surface of the cylindrical housing 32 and wound around a cable reel 36 having a coil spring (not shown). Is connected to a wire 37. Accordingly, the pillar pack 20 moves forward by the cylindrical piston 41 which moves inside the cylindrical housing 32 while simultaneously rotating the screw piston 51 in one direction by driving the driving motor 65. Is promoted.

The open upper portion of the cylindrical housing 32 is provided with an electromagnet 31 having a cylindrical structure in which a hole communicating with the lower surface is formed. The electromagnet 31 is electrically connected to the electromagnet switch 35. The electromagnet 31 is attached to the outer surface of the ladle 1 by the magnetic force generated when the electromagnet switch 35 is operated in the state in which the electromagnet 31 is brought into contact with the outer lower surface of the outlet of the molten steel ladle 1.

On the other hand, a cylindrical groove in which the piston shaft 55 of the threaded piston 51 can be coupled to the lower surface of the cylindrical piston 41 is processed. A center ring 44 is provided between the cylindrical piston 41 and the threaded piston 51 in which a hole through which the piston shaft 55 can penetrate is drilled. Ball bearings 43 are provided on both sides of the center ring 44, and washers 42 are provided on the outer surface of the ball bearing 43. At this time, the lower surface of the cylindrical piston 41 is provided with a bearing cover 46, which is assembled by the bolt 47.

On the lower surface of the cylindrical threaded piston 51 on which the outer thread is processed, the spline outer shaft 52 to which the spline inner shaft 62 provided at one end of the driving motor 65 is coupled is assembled by the bolt 47. A roller bearing 53 is assembled to the outer surface of the spline outer shaft 52, and spacers 54 are provided on both sides of the roller bearing 53. Reference numeral 56 denotes a key bolt connecting the spline inner and outer shafts 52 and 62.

A guide piston 61 is provided between the screw piston 51 and the drive motor 65 which are connected to each other via the spline inner and outer shafts 52 and 62. The outer side of the guide piston 61 is provided with a guide vane that engages the guide groove 38 provided on the inner side of the cylindrical housing 32. Reference numeral 64 is a speed reducer, 63 is a flange for fixing the drive motor 65, and 66 is a gap washer 66 for adjusting the distance between the screw piston 51 and the guider piston 61.

Hereinafter, the operation of the filler pack and the filler pack inserting apparatus according to the present invention will be described.

First, when the exit repair work such as the sliding nozzle 5 is completed, the cassette is operated such that the barrel nozzle 2, the inner plate 3, the outer plate 4, and the sliding nozzle 5 are opened in a line in the same workplace. do.

In the filler pack inserting apparatus 30 according to the present invention, the pushing means is located in the lower portion of the receiving space of the cylindrical housing 32, the filler pack 20 is accommodated in the upper portion of the upper surface of the cylindrical piece tone 41 It is seated on the phase. That is, as shown in Figure 8a, the filler pack 20 is moved in the direction of the arrow (A) is accommodated in the receiving space. And, the upper portion of the filler pack 20 is maintained in a state exposed to the outside of the electromagnet 31.

The electromagnet 31 is in close contact with the cassette so that its center coincides with the rear end of the sliding nozzle 5. When the electromagnet switch 35 is operated "ON", the insertion device is attached to the cassette. Thereafter, when the motor switch 34 is operated in the 'forward' position, the driving motor 65 is operated so that the screw piston 51 moves forward while rotating along the screw 39 of the cylindrical housing 32. At the same time, the cylindrical cylinder 41 is advanced to the outer plate 4 so that the filler pack 20 is inserted into the exit hole of the molten steel ladle 1. According to a preferred embodiment of the present invention, the filler pack 20 is inserted such that the cutting line 23 formed at the lower portion thereof is positioned at the boundary between the inner plate 3 and the outer plate 4.

At this time, since the filler pack 20 is fitted to the tap hole, if the cutting line 23 of the filler pack is not located at the interface between the inner plate 3 and the outer plate 4 by the operation as described above, the motor switch Repeat operation 34 several times. The position of the cutting line 23 is made by adjusting the distance between the screw piston 51 and the guider piston 61 in consideration of the gap adjusting washer 66, and as a result, the insertion position of the filler pack 20 can be adjusted. have.

When the inserting operation of the filler pack 20 is completed, the motor switch 34 is operated to the 'reverse' position to drive the driving motor 65 in the reverse direction. At this time, the screw piston 51 is retracted while rotating along the screw 39 of the cylindrical housing 32, the filler pack inserting device 30 by operating the motor switch 34 and the electromagnet switch 35 in the "OFF" Separate from the cassette.

After that, when the cassette is operated such that the outer plate 4 and the sliding nozzle 5 close the exit hole, the cutting line 23 of the filler pack is cut and the lower surface of the built-in filler pack 20 is cut out of the outer plate 4. The lower part of the filler pack 20 in contact with and cut) is discharged to the outside through the sliding nozzle 5 when the molten steel ladle 1 is established.

Then, when the molten steel is placed on the molten steel ladle 1, the compressed paper 25 of the filler pack 20 is burned by the high heat of the molten steel, so that the filler flows down to cover the tap hole. On the other hand, the ash of the compressed paper burnt in the tapping hole forms a separator between the filler and the barrel nozzle.

According to the present invention, since the filler pack is inserted into the tap at the same workshop after the repair work of the molten steel ladle is completed, the waiting time of the ladle due to the delay of the repair work is shortened, and the filler is quantitatively packaged to prevent the waste of the filler. This prevents cases of molten steel being returned due to poor opening of the tap due to moisture inflow, improves the working environment such as preventing heavy metal poisoning of workers, and prevents the risk of equipment accidents such as collisions.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains recognize that modifications and variations can be made to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. shall.

Claims (5)

In the filler pack for sealing the barrel nozzle provided in the exit of the molten steel ladle, Composed of a hollow body of compressed paper material having an outer diameter corresponding to the inner diameter of the barrel nozzle and having a hollow portion in which the filler is accommodated The filler pack for inserting the tap hole of the molten steel ladle, characterized in that the waterproof film is coated on the outer surface of the main body. The method of claim 1, The hollow body is manufactured in a conical shape having a lower opening, the opening lower portion of the main body of the filler pack for inserting the molten steel ladle, characterized in that closed by a stopper. An apparatus for inserting a filler pack in which a filler for sealing a molten steel ladle opening is packaged in a disposable unit, into a barrel nozzle provided in the tap, A cylindrical housing having an accommodation space accommodating the filler pack and having an open top; Propulsion means for pushing the filler pack accommodated in the receiving space to the upper open, Filler pack inserting device comprising an attachment means for attaching the open upper portion of the cylindrical housing to the outer surface of the tap so that the filler pack accommodated in the receiving space to match the barrel nozzle. The method of claim 3, And the attachment means includes an electromagnet provided on an open top of the cylindrical housing. The method of claim 3, An inner thread is processed on an inner surface of the cylindrical housing, and the propulsion means includes a support member which is slidable in the receiving space; A rotating member provided on an outer circumferential surface thereof and engaged with a lower portion of the supporting member, the outer thread being engaged with the inner thread; And a filler pack configured to drive the rotating member so that the filler pack supported on the support member in the accommodation space is rotated to one direction by rotating the rotating member in one direction.

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