KR100408669B1 - Device for supplying argon gas of ladle - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide an inert gas supply device for a ladle that allows gas to be supplied through a triion, which is a rotation shaft of the ladle, so that the gas can be supplied even during slag excavation by rotating the ladle.

Accordingly, the present invention is connected to the forlas plug of the ladle and extending to the tip of the trinion through the center of the trinion, and the connection portion for connecting the inert gas supply pipe is installed on the ladle stand to the tip of the gas pipe of the trinion, When the ladle is seated horizontally provided to provide an inert gas supply device of the ladle consisting of an operating part for moving the gas supply pipe front end of the connecting portion to the front end to the gas pipe.

Description

Device for supplying argon gas of ladle

The present invention relates to ladles in the steelmaking process, and more particularly, to an apparatus for supplying refining inert gas to the ladles.

In general, molten steel that has been blown during the steelmaking process is subjected to casting ladles and is sent to the next process. The molten steel in the ladles has low cleanliness due to temperature, nonuniformity of components, or injuries of inclusions. By passing an inert gas into the molten steel through the installed porous plug, molten steel of high cleanness can be obtained.

In other words, the molten steel received on the ladle is subjected to secondary refining to adjust the composition and temperature, and the secondary refining is carried out by injecting argon gas, which is an inert gas, to the molten steel inside the casting ladle through a porous plug of porous refractory wire. By blowing the molten steel inside the casting ladle by blowing, it is an essential work for fine component and temperature adjustment.

This secondary refining operation is performed by mounting the ladle stand on the ladle stand and the ladle stand and the gas pipe installed on the ladle, for this purpose, as shown in Figure 5, ladle 100 and ladle When the gas pipe 101 and the supply pipe 201 are installed on the contact surface of the stand 200, and the airtight pads 102 and 202 are attached to the ladle 100, the ladle 100 is seated on the ladle stand 200. The supply pipe 201 is in contact with each other is connected to the gas through the supply pipe 201 and the gas pipe 101 is a structure in which the gas into the porous plug 103 of the ladle 100.

However, the conventional structure has a problem in that when the ladle is rotated to exclude the slag on the upper ladle, the ladle cannot be rotated since the contact surface on which the gas pipe and the supply pipe are installed is not connected to the gas pipe and the supply pipe.

Therefore, in the prior art, it was simply used to limit the uniformity of molten steel and to prevent the temperature of molten steel, and has a disadvantage of having to pass a separate ladle excluding device.

In addition, since the gas and supply pipes are connected vertically, when the molten steel is contained, the weight of the ladle, which is about 150 to 450 tons, is applied to the pad sealing the gas and supply pipes, which shortens the life of the pads and frequently replaces the pads. There is a problem that must be done.

Accordingly, the present invention has been made to solve the above problems, the inert gas supply device of the ladle so that the gas can be supplied during the slag excavation operation by rotating the ladle to allow the gas to be supplied through the triion of the ladle's rotation axis The purpose is to provide.

1 is a schematic perspective view of a gas supply device according to the present invention;

Figure 2 is a perspective view showing a ladle stand is installed gas supply apparatus according to the present invention,

3 is a detailed view of FIG. 2 according to the present invention;

Figure 4 is a state diagram showing the operating state of the gas supply apparatus according to the present invention,

5 is a view showing a gas supply apparatus according to the prior art.

Explanation of symbols on the main parts of the drawings

10 gas pipe 11: trinion

12: skirt 20: ladle stand

21: seating groove 30: fixing bracket

31: fixed pipe 32: internal pipe

33: supply pipe 34: gas hose

35: elastic spring 36: pad

40: stopper 50: operating member

51: engaging jaw 52: guide bar

53: guide plate 54: elastic spring

55: wire 56,57: pulley

The present invention for realizing the above object, and the gas pipe is connected to the tip of the trinion through the interior of the trinion center of the ladle, and the connection portion is installed on the ladle stand for connecting the gas supply pipe to the tip of the gas pipe of the trinion and When the ladle is seated, it is horizontally moved and includes an operation part for moving the gas supply pipe tip of the connecting part to the tip of the gas pipe.

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

1 is a schematic perspective view of a gas supply apparatus according to the present invention, Figure 2 is a perspective view showing a ladle stand is installed gas supply apparatus according to the present invention.

According to the above drawings, the gas pipe 10 connected to the lower porous plug of the ladle is installed perpendicular to the side of the ladle and bent at one side and inserted into the trinion 11 to be installed along the central axis of the trinion 11. The structure extends to the tip.

The ladle stand 20 on which the ladle is placed is installed at a predetermined height on the floor of the facility and has a structure in which a seating groove 21 in which the trion 11 of the ladle is seated is formed.

As shown in FIG. 3, the connection part according to the present invention includes a fixing bracket 30 protruding to the seating groove 21 side to the ladle stand 20, and a trinion 11 on the fixing bracket 30. The fixed pipe 31 fixed in the axial direction, the inner pipe 32 is installed slidably in the fixed pipe 31, the inner pipe 32 is installed on the inner end and protrudes through the fixed pipe 31 end The supply pipe 33 connected to the gas pipe 10 of the ladle trinion 11, the gas hose 34 connected to the supply pipe 33 through the outer end of the inner pipe 32, and supply the gas to the inner pipe ( 32) An elastic spring 35 is installed between the inner end and the fixed pipe 31 to apply an elastic force to the inner pipe 32, and an airtight pad 36 is provided at the tip of the supply pipe 33.

The front end of the fixing bracket 30 cuts the center portion to prevent the gas hose 34 from being caught by the fixing bracket 30 as the inner pipe 32 moves, and prevents the inner pipe 32 from being separated. In order to install the stopper 40.

The center of the trinion (11) is connected to the tip of the gas pipe 10 is installed in the inclined inward annular guide skirt 12 so that the gas supply pipe 33 is correctly guided to the gas pipe (10).

Reference numeral 37 denotes a fastening bracket 37 for binding the fixed pipe 31 to the fixed bracket 30.

On the other hand, the operating unit according to the present invention is installed in the ladle stand 20, as shown in Figure 4 operating member 50, protruding through the hole in the upper seating groove 21, both sides of the operation member 50 It is installed in the projection jaw 51, the guide bar 52, the ladle stand 20 installed vertically downward on the locking jaw 51 to protrude from the mounting groove 21 to prevent the departure to the outside of the hole of the seating groove 21 To be inserted into the guide plate 53 and the guide bar 52 in which the guide bar 52 is formed, and the guide bar 52 is disposed between the guide plate 53 and the locking jaw 51 to apply an elastic force to the operating member 50. Wire 55 for connecting the inner end of the inner pipe 32 and the direction of the wire 55 through the elastic spring 54 and the long hole 38 formed in the lower portion of the operation member 50 and the fixing bracket 30. It consists of a pulley 56 for controlling.

Here, look at the installation state of the wire 55, the lug 39 is attached to the lower end of the inner pipe 32 and the operating member 50 is cut off the center of the lower end and installed across the pin 61 Hooks provided at both ends of the wire 55 are connected to the lug 60 and the pin 61, respectively.

In addition, the pulley 56 is installed in the fixed bracket 30, so that the wire 55 is positioned below the fixed pipe 31 to maintain the horizontal direction and the moving direction of the inner pipe (32).

In FIG. 4, reference numeral 57 is a second pulley installed between the pulley 56 and the pin 61 in order to maximize the transmission force of the wire 55 according to the lifting and lowering of the operation member 50.

Hereinafter will be described the operation according to an embodiment of the present invention.

As shown in FIG. 2, in the state where the ladle is not seated on the ladle stand 20, the actuating member 50 is moved to the ladle stand 20 by the elastic force of the elastic spring 54 installed on the actuating member 50. The inner pipe 32 protruding from the mounting groove 21 through the hole formed in the mounting groove 21 of the mounting bracket 21 on the side of the mounting groove 21 is fixed to the fixing bracket 30. The supply pipe 33 which is pushed out by the elastic spring 35 provided and installed in the inner pipe 32 is in a backward state.

In this state, when the ladle transported by the crane is placed on the ladle stand 20, trions on both sides of the ladle are placed in the seating grooves 21 of the ladle stand 20, and the upper part of the seating grooves 21. Press down the working member 50 is protruding.

Therefore, as shown in FIG. 4, while the operation member 50 descends, the wire 55 connected to the lower portion of the operation member 50 is pulled downward, and the wire 55 descends of the operation member 50. The transfer amount is transferred to the inner pipe 32 through the pulleys 56 and 57.

That is, when the operation member 50 is lowered, the wire 55 is pulled in the direction of the go, and the inner pipe 32 connected to the front end of the wire 55 via the lug 60 is pulled and moved in the direction of I. .

As the inner pipe 32 moves into the fixed pipe 31, the supply pipe 33 installed at the tip of the inner pipe 32 gradually moves toward the triion 11 of the ladle seated on the ladle stand 20. Done.

When the ladle is completely seated in the ladle stand 20, the operation member 50 is pressed completely by the trion of the ladle, the supply pipe 33 is installed in the inner pipe 32 as shown in FIG. Is the most advanced is connected to the gas pipe 10 is installed in the center of the trion placed in the seating groove (21).

Here, the guide skirt 12 is installed at the tip of the gas pipe 10 of the trion, and the supply pipe 33 entering the gas pipe 10 may be guided by the guide skirt 12 to be accurately connected to the gas pipe 10. (33) The airtight pad 36 provided at the tip is kept in close contact with the gas pipe 10.

When the gas pipe 10 and the supply pipe 33 are connected as described above, the inert gas introduced through the gas hose 34 is supplied to the porous plug installed under the ladle via the supply pipe 33 and the gas pipe 10 to stir the internal molten steel. Let's go.

In this way, even if the ladle is tilted to the ladle stand 20 to perform the slag discharge operation, the gas pipe 10 and the supply pipe 33 connected to the center of the triion 11 which is the rotational axis of the ladle are tree It will be able to perform a continuous stirring operation while rotating in the same manner as the neon (11).

On the other hand, when the refining operation is completed to move the ladle, the operating member 50, which was pressed by the trion 11 while lifting the ladle from the ladle stand 20, the locking jaw 51 and the guide plate 53 ) Is raised through the hole of the seating groove 21 by the return force of the elastic spring 54 that is installed and pressed between.

As the operating member 50 rises, the wire 55 pulling the inner pipe 32 moves in the direction of Ra in FIG. 4 to release the pulling force of the inner pipe 32, thereby moving the inner pipe 32 forward. By the return of the elastic spring 35 that is compressed in the fixed pipe 31 by the inner pipe 32 to the reverse direction, the reverse inner pipe 32 is the stopper of the front end of the fixed bracket (30) ( Stop at 40).

As described above, according to the inert gas supply device of the ladle according to the present invention, the life of the pad can be extended by preventing the weight of the ladle from reaching the pad sealing the supply pipe and the gas pipe, and the time and effort for pad replacement can be reduced. Can be.

In addition, the slag discharge operation can be performed by rotating the ladle even while supplying gas, thereby reducing the process.

Claims (3)

(Correction) A gas pipe connected to the forlas plug of the ladle and extending to the tip of the trinion through the center of the triion, and a connection part for connecting the inert gas supply pipe to the tip of the gas pipe of the trinion installed on the ladle stand, and the ladle It includes an operation unit for moving the gas supply pipe front end of the connecting portion to the front end to the gas pipe is horizontally moved when seated, The connection part is a fixed bracket protruding to the mounting groove side of the ladle stand, a fixed pipe fixed to the triion direction axially installed on the fixing bracket, an inner pipe slidably installed in the fixed pipe, the inner pipe inside the inner end A supply pipe which is installed and protrudes through the fixed pipe end to be connected to the gas pipe of the ladle trinion, a gas hose that is connected to the supply pipe through the inner pipe outer end to supply gas, and is installed between the inner end of the inner pipe and the fixed pipe An inert gas supply device for a ladle comprising an elastic spring for applying an elastic force to a pipe, and an airtight pad provided at a tip of a supply pipe. (delete) (Correction) The method according to claim 1, wherein the operating part is installed in the ladle stand and protrudes through a hole in the upper seating groove, and in the ladle stand protruding on both sides of the operating member, A guide bar vertically installed at the bottom, a guide plate fixedly installed in the ladle stand, and having a hole for guiding the guide bar, an elastic spring inserted into the guide bar and placed between the guide plate and the locking jaw to apply elastic force to the operation member; An inert gas supply device for a ladle, comprising: a wire connecting the lower end of the operating member to an inner end of the inner pipe; and a pulley for controlling the direction of the wire.