JPH05111743A - Method and device for changing refractory in tundish - Google Patents

Abstract

PURPOSE:To provide a changing method and device for refractory in a tundish, capable of safely changing the refractory in the tundish in the ordinary state and even in the hot state with a mechanical work within short time. CONSTITUTION:By using a refractory changing device 50 provided with a arms 1 holding/releasing the refractory and shifting mechanism 3 for shifting the arms 1, the change of the refractory is automatically executed. Further, the device 50 is provided with a rotating mechanism 25 for controlling the progressive direction of the arm 1 to automatically execute the change of the refractory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tundish refractory replacement method and apparatus, and more particularly, to a tundish flow control device of a continuous casting apparatus for automatically exchanging refractories by mechanical work. The present invention relates to a refractory replacement method and apparatus.

[0002]

2. Description of the Related Art Conventionally, in a general continuous casting facility, molten steel in a ladle is moved relative to a fixed plate and a sliding plate of a flow rate control device, and a ladle nozzle is used to control the flow rate of the molten steel. Poured into a tundish. Then, the molten steel poured into the tundish is further supplied to the mold through the refractory of the flow rate control device mounted on the bottom of the tundish.

By the way, since the refractory material is used in a severe condition such as flowing molten steel, there is a problem that it is easily corroded and easily damaged. Further, since the refractory material is limited in terms of material, there is a problem that the service life is short. Therefore, it is necessary to frequently replace the refractory even during continuous casting. To replace this refractory, remove the flow control device from the tundish once, separate the refractory from the tundish, and manually replace the refractory with a new one by the operator. It was done by the method of attaching.

When the tundish is used in continuous hot without cooling the tundish without repairing the refractory on the inner surface of the tundish, the refractory replacement time is shortened and the tundish is used efficiently. For the purpose of improvement, the operator manually removes the refractory from the hot tundish and replaces it with a new refractory without removing the flow control device from the tundish.

[0005]

However, after the flow control device is once removed from the tundish,
The method of exchanging the refractory has a problem that it requires more work steps and takes a longer time than the method of exchanging the refractory directly. Further, also in the method of directly exchanging the refractory material, when exchanging the refractory material of the tundish in the hot state, heat and gas from the tundish are jetted from the fluid outflow hole of the tundish, There is a problem that the work environment becomes worse and the operator's work is dangerous.

[0006] Therefore, in order to prevent the heat and gas and the like from being jetted from the fluid outflow hole of the tundish, it is conceivable to lower the temperature of the tundish and then replace the refractory. If the temperature of the dish is once lowered, it takes time to raise the temperature of the tundish again, and there is a problem that continuous hot work cannot be performed and workability is deteriorated.

An object of the present invention is to solve such a problem, and it is possible to safely and safely replace tundish refractory in a hot state as well as in a normal state by mechanical work. It is an object of the present invention to provide a tundish refractory exchange method and an apparatus therefor in a short time.

[0008]

To achieve this object, the present invention provides a method for replacing a refractory material of a flow control device of a tundish of a continuous casting machine, wherein the flow control device and the refractory material are attached. Using a refractory exchange device having one or two pairs of arms capable of holding / opening the refractory and a moving mechanism for moving the arm, with the fluid outflow hole of the tundish facing sideways or upward, Move to the refractory, hold the refractory with the arm, remove the refractory from the tundish, hold the replacement refractory with the arm or another arm, and hold the arm. To the refractory installation position of the tundish to attach the replacement refractory to the tundish and to release the tundish from the arm. There is provided a refractory replacement method Isshu.

In the method for replacing the refractory of the tundish flow controller of the continuous casting apparatus, the fluid outlet holes of the tundish to which the flow controller and refractory are attached are set sideways or upward, and A refractory replacement device including a plurality of arms capable of holding and releasing the arm, a rotating mechanism for controlling the direction of the arm, and a moving mechanism for moving the arm is used. After holding the refractory attached to the tundish and removing the refractory from the tundish, the other arm is moved toward the refractory of the tundish. , The arm holding the replacement refractory is rotated so as to face the refractory installation position of the tundish, and is moved at the opposing position to move the replacement refractory to the tundish. While attached to the Mesh, there is provided a refractory replacement method tundish, characterized in that releasing from the arm.

Further, the tank is provided with one or two pairs of arms for holding and releasing the refractory and a moving mechanism for moving the arms between the arms and the tundish. A refractory exchange device for a dish is provided. Further, it further comprises a plurality of arms for holding and releasing the refractory, a rotating mechanism for controlling the direction of the arms, and a moving mechanism for moving the arms between the arms and the tundish. It is intended to provide a tundish refractory exchange device.

[0011]

According to the first aspect of the invention, the refractory is held and
Since the refractory exchange device is equipped with a refractory exchange device equipped with one or two pairs of arms that can be opened and a movement mechanism that moves the arms, the refractory of the tundish in a hot state is safe. In addition, it can be replaced in a short time.

That is, since the refractory exchange device automatically performs all the refractory exchange work of the tundish,
Even if heat, gas, and the like are ejected from the hot tundish during the work, the work is not dangerous. Further, when the refractory material is replaced, since the fluid outflow holes of the tundish are oriented sideways or upward, molten steel does not flow down from the fluid outflow holes.

According to the second aspect of the present invention, the fireproof device includes a plurality of arms capable of holding and releasing the refractory, a rotating mechanism for controlling the direction of the arms, and a moving mechanism for moving the arms. Since the refractory is automatically replaced using the object exchanging device, the arm in which the refractory for replacement is set and the arm for removing the refractory attached to the tundish are arbitrarily changed. Therefore, it is possible to continuously remove the refractory and attach the replacement refractory. Therefore, in addition to the above action, the refractory of the tundish in the hot state can be replaced in a shorter time.

Further, since the refractory exchanging device is provided with the rotating mechanism for controlling the moving direction of the arm, the arm can be efficiently moved to any position. Therefore, since the replacement refractory supply position and the refractory disposal position can be arbitrarily set, the work range can be minimized and the work efficiency can be improved. Further, according to the invention of claim 3, the refractory can be freely and automatically transported between the tundish and the arm for holding and opening the refractory, and the refractory is automatically replaced. be able to.

Further, according to the invention of claim 4, between the arm for holding and releasing the refractory and the tundish, the advancing direction of the arm can be arbitrarily changed to automatically convey the refractory. Therefore, in addition to the above action, the refractory can be automatically and continuously replaced. Also,
Since the replacement refractory supply position and the refractory disposal position can be arbitrarily set, the work range can be minimized and the work efficiency can be improved.

[0016]

Embodiments of the present invention will now be described with reference to the drawings. (Embodiment 1) FIG. 1 is a schematic sectional view showing a tundish refractory exchange device according to the present invention.
[Fig. 2] is a process drawing showing a method of exchanging refractory materials of a tundish using the refractory material exchanging device shown in Fig. 1.

In the refractory exchange device indicated by 50 in FIG. 1, an arm moving mechanism 3 is provided in a main body 4, and an arm 1 is connected to a tip end of the arm moving mechanism 3 via a holding and releasing mechanism 2. At the bottom of the main body 4, the wheels 5 with stoppers are provided.
Is installed. Further, although not shown, the refractory exchange device 50 has a fluid outlet hole 19 of the tundish.
A tuyere cleaning device for cleaning (tuyere) is connected.

The arm 1 has a structure in which an upper arm 1A and a lower arm 1B are supported by a fulcrum 12, and is designed to move like a scissor blade with the fulcrum 12 as a center. The arm moving mechanism 3 has a structure in which a rod 7 is fixed to a piston 6 and the rod 7 is built in a cylinder 8. The arm 1 moves when the piston 6 reciprocates.
Is designed to move back and forth. The reciprocating motion of the piston 6 is arbitrarily controlled by a control device (not shown).

The retaining / releasing mechanism 2 has two rods 9 fixed to a piston 11 and built in a cylinder 10, which are opposed to each other at right angles to the longitudinal direction of the rod 7. By the reciprocating motion of each piston 11, the upper arm 1A and the lower arm 1B are moved around the fulcrum 12, and the arm 1 is provided with a holding / opening function. The reciprocating motion of the piston 11 is arbitrarily controlled by a control device (not shown).

Next, a specific operation of the tundish refractory exchange device 50 according to this embodiment will be described with reference to FIGS. First, in the step shown in FIG. 2, the tundish 13 in the hot state with the tundish lid 14 is rotated 90 degrees so that the fluid outflow holes 19 are oriented sideways.
By doing so, the molten steel remaining in the tundish 13 does not flow out from the fluid outflow hole 19 during the refractory replacement work. In this tundish 13, a refractory material 16 supported by a refractory material support frame 17 is attached to a fluid outflow hole 19, and the flow control device 1 is attached to the outer periphery thereof.
5 are installed. And this flow control device 15
Are controlled by the flow control actuator 18.

Next, the refractory exchange device 50 is moved to a predetermined position and then fixed. At this time, the refractory exchange device 50
Since the wheels 5 are installed at the bottom of the refractory, the refractory exchange device 50 can be easily moved. Also, the wheel 5
Is fixed by the stopper, the refractory exchange device 50 does not move from the predetermined position. Next, the control device that operates the piston 6 of the arm moving mechanism 3 is turned on, and the arm 1 is moved toward the refractory material 16 of the tundish 13. At this time, the control device that operates the piston 11 of the holding and opening mechanism 2 is turned on, and the tip of the arm 1 is kept open.

Next, in the step shown in FIG. 3, after the arm 1 reaches the refractory material 16, the piston 11 of the holding / opening mechanism 2 is pulled inward (the central portion of the holding / opening mechanism 2) to move the arm 1. The tip of the arm 1B is brought close to the tip of the arm 1A, and the refractory 16 is held by both tips. Next, in the step shown in FIG. 4, with the refractory 16 held by the arm 1,
The piston 6 of the arm moving mechanism 3 is pulled in the opposite direction to the tundish 13 and the refractory 16
Remove.

In this way, by using the refractory exchange device 50, the refractory 16 can be safely and automatically removed from the hot tundish 13 in a short time. Then, after cleaning the fluid outflow hole 19 with a tuyere cleaning device (not shown) connected to the refractory exchange device 50, the piston 11 of the holding / opening mechanism 2 is pulled to the outside to open the tip of the arm 1. Then, the refractory material 16 is opened and discarded. At this time, the wheels 5 may be moved again to move the refractory exchanging device 50 to the refractory discarding position, at which the refractory 16 may be opened and discarded, or the refractory exchanging device 50 may be moved. Instead, the refractory material 16 may be opened and discarded at a desired position within the range in which the arm 1 moves, and then the refractory material 16 may be carried out to the outside by using, for example, a truck.

Next, the arm 1 is moved to the replacement refractory supply position, the tip of the arm 1A and the tip of the arm 1B are brought close to each other in the same manner as described above, and the refractory for replacement is held by both tips, The tundish 13 is moved to the refractory installation position, the replacement refractory is attached to the refractory installation position, the replacement refractory is released from the arm 1, and then the arm 1 is returned to a predetermined position.

In this manner, by using the refractory exchange device 50, the exchange refractory can be safely and automatically attached to the hot tundish 13 in a short time. .. After the casting is completed, the refractory 16 is replaced by placing the tundish 13 on the casting floor in a tilted state and removing the flow control device 15 using a crane. The attached flow rate control device was attached to a predetermined position of the tundish 13. And this work took about 25 minutes on average.

On the other hand, the refractory exchanging device 50 according to the present embodiment.
When the refractory material 16 was replaced by using, the work could be completed in about 15 minutes on average, and the work efficiency was significantly improved. Also, the crane slinging work has disappeared. Furthermore, the operator's heavy muscle work was eliminated, and the working environment was improved. In this embodiment, the arm 1 is moved by using the reciprocating motion of the piston 6 as the arm moving mechanism 3. However, the present invention is not limited to this, and the arm 1 may be moved by another method. Further, as shown in FIG. 5, the detention / release mechanism 2 and the arm 1 are directly installed on the main body 4, the wheels 5 are regarded as the arm moving mechanism 3, and the refractory exchanging device 50 is moved to move the arm. The mechanism 3 can be substituted.

Further, in this embodiment, the reciprocating motion of the piston 11 is used as the retaining / releasing mechanism 2 to impart the retaining / releasing function to the arm 1. However, the present invention is not limited to this, and is shown in FIG. Thread the arm 1 and attach it to the worm 2
Worm-up gear 22 consisting of 0 and worm gear 21
Other methods may be used, such as rotating via the arm 1 to give the arm 1 a holding / opening function. Note that FIG. 6 is an enlarged view of the tip portion of the arm 1. Second Embodiment Next, a second embodiment according to the present invention will be described with reference to the drawings.

7 to 9 are process drawings showing a method for exchanging refractory materials in a tundish using the refractory material exchanging apparatus according to the second embodiment. In addition, FIG. 10 and FIG.
FIG. 3 is an enlarged cross-sectional view of an arm 1 and a holding / releasing mechanism 2.
FIG. 10 shows a state in which the arm 1 is provided with an opening function, and FIG. 11 shows a state in which the arm 1 is provided with a holding function.

The refractory exchange apparatus shown at 50 in FIGS. 7 to 9 is provided with an arm moving mechanism 3 in the main body 4 and the arm is provided with a holding / releasing mechanism 2 at the tip thereof, as in the first embodiment. 1 is connected. A wheel 5 with a stopper is installed on the bottom of the main body 4. Further, although not shown, a tuyere cleaning device for cleaning the fluid outlet hole 19 (tuyere) of the tundish is connected to the refractory exchange device 50.

The arm 1 is composed of a pair of hooking mechanisms 1C which can move forward and backward at right angles to the longitudinal direction of the rod 7. As shown in FIGS. 10 and 11, when the arm 1 is provided with an opening function. The hooking mechanism 1C is built in the rod 7 and projects from the rod 7 when a holding function is provided. Then, the holding / releasing mechanism 2 includes the piston 1
1 has a rod 9 fixed thereto, and two cylinders having the rod 9 incorporated therein are provided so as to face each other at right angles to the longitudinal direction of the rod 7, and by the reciprocating motion of each piston 11,
By performing the forward / backward movement of the hooking mechanism 1C, the arm 1 is provided with a holding / release function. The reciprocating motion of the piston 11 is arbitrarily controlled by a control device (not shown).

Next, a specific operation of the tundish refractory exchange device 50 according to the second embodiment will be described with reference to FIGS. 7 to 11. First, in the process shown in FIG. 7, as in the first embodiment, the tundish 13 in the hot state with the tundish lid 14 is rotated by 90 degrees, and the fluid outflow hole 19 is turned sideways.

Then, the refractory exchanging device 50 is moved to a predetermined position and then fixed in the same manner as in the first embodiment. Next, the control device for actuating the piston 6 of the arm moving mechanism 3 is turned on to set the arm 1 to the refractory 1 of the tundish 13.
Move toward 6. At this time, the control device for actuating the piston 11 of the detention / release mechanism 2 is turned on to give the arm 1 an opening function, and the hooking mechanism 1C is built in the rod 7 to bring the state shown in FIG. By doing this,
When the arm 1 is inserted into the fluid outflow hole 19 of the tundish 13, the hooking mechanism 1C does not get in the way and the smooth insertion can be performed.

Next, in the step shown in FIG. 8, after inserting the arm 1 into the fluid outflow hole 19, the piston 11 of the holding / releasing mechanism 2 is pulled outward, and the hooking mechanism 1C is projected from the rod 7, The state shown in FIG. afterwards,
The piston 6 of the arm moving mechanism 3 is moved back and forth to move the arm 1
The hook mechanism 1C to control the position of
6 and the refractory 16 is held.

Next, in the step shown in FIG. 9, the arm 1
While holding the refractory 16 in place, the piston 6 of the arm moving mechanism 3 is pulled in the direction opposite to the tundish 13, and the refractory 16 is removed from the tundish 13. In this way, by using the refractory exchange device 50, the refractory 16 could be safely and automatically removed from the tundish 13 in the hot state in a short time.

Then, a tuyere cleaning device (not shown) connected to the refractory exchange device 50 is used to remove the fluid outflow holes 19
After cleaning, the piston 11 of the detention / opening mechanism 2 is pulled inward, the hooking mechanism 1C is built in the rod 7, and the refractory 16 is opened and discarded. At this time, the wheels 5 may be moved again to move the refractory exchanging device 50 to the refractory discard position, where the refractory 16 may be opened and discarded.
Further, without moving the refractory material exchanging device 50, the refractory material 16 is opened and discarded at a desired position within the range in which the arm 1 moves, and then it is carried out to the outside by using, for example, a truck. May be. As a method of removing the refractory material 16 from the arm 1, for example, after the refractory material 16 is attached to a predetermined position of the used refractory material disposal bucket, a method reverse to the step shown in FIG. 8 may be performed. Good.

Then, the arm 1 is moved to the replacement refractory supply position, and the arm 1 is inserted into the fluid outflow hole of the replacement refractory in the same manner as described above to hold the replacement refractory. , The tundish 13 is moved to the refractory installation position, the replacement refractory is attached to the refractory installation position, the replacement refractory is released from the arm 1, and then the arm 1 is returned to a predetermined position.

In this manner, by using the refractory exchange device 50, the exchange refractory can be safely and automatically attached to the hot tundish 13 in a short time. .. Then, the refractory exchanging device 50 according to the present embodiment.
As in Example 1, the work efficiency was remarkably improved, the heavy work of the operator was eliminated, and the work environment was also improved.

In this embodiment, the reciprocating motion of the piston 11 is used as the retaining / releasing mechanism 2 to impart the forward / backward movement to the hooking mechanism 1C to perform the retaining / releasing, but the invention is not limited to this. Alternatively, for example, as shown in FIG. 12, a link type arm 1 may be used, and as shown in FIG.
Other methods may be used, such as imparting a holding and releasing function by rotating the arm 1 about the fulcrum 12. 12 and 13 are enlarged views of the arm 1.

Further, as shown in FIG. 14, a tundish holding guide 23 is installed on the tundish 13 so that the refractory exchange device 50 can be used when the refractory 16 is removed.
The force applied to the side may be absorbed. And again, FIG.
As shown in FIG. 4, when the replacement refractory is held by the arm 1, the refractory pushing block 24 is located at a position where the rod 7 comes into contact with the rear end of the replacement refractory (the side closer to the main body 4).
Is installed in a state in which it is projected at a right angle to the longitudinal direction of the rod 7, so that the refractory for replacement is tundish 13
When the refractory pushing block 24 is pressed against the replacement refractory when the refractory is pushed into the predetermined position, it is possible to easily attach the replacement refractory to the tundish 13. (Third Embodiment) Next, a third embodiment according to the present invention will be described with reference to the drawings.

FIG. 16 is a plan view of the refractory exchange apparatus according to the third embodiment, and FIG. 17 is a sectional view taken along line AA of the refractory exchange apparatus shown in FIG. 18 to 22.
FIG. 18 is a process diagram showing a method for exchanging the refractory material of the tundish using the refractory material exchanging device shown in FIGS. 16 and 17. A refractory exchange device shown at 50 in FIGS. 16 and 17 is provided with two arm moving mechanisms 3 similar to those of the second embodiment at 90 degrees apart from each other in the main body 4, and the tip ends thereof are the second embodiment. The arm 1 is connected to the arm 1 via a holding and releasing mechanism 2 similar to the above. That is, one arm 1 is for removing the used refractory material 16 from the tundish 13, and the other arm 1 is for attaching the replacement refractory material 16B to the tundish 13 at a predetermined position. belongs to.
A rotating mechanism 25 for rotatably moving the main body 4 is installed below the main body 4, and is further mounted on a carriage 26 via the rotating mechanism 25. Wheels 5 with stoppers are installed at the bottom of this trolley. Further, although not shown, the refractory exchange device 50 is connected to a tuyere cleaning device for cleaning the fluid outflow hole 19 (tuyere) of the tundish.

Next, the specific operation of the tundish refractory exchange device 50 according to the third embodiment will be described with reference to FIGS.
Will be described. First, in the process shown in FIG. 18, as in the first embodiment, the tundish 13 in the hot state with the tundish lid 14 is rotated by 90 degrees, and the fluid outflow hole 1
Turn 9 sideways.

Then, in the same manner as in Example 1, the refractory exchange device 50 is moved to a predetermined position and then fixed. Here, the arm 1 for removing the used refractory material 16 from the tundish 13 is fixed so as to be on the tundish 13 side. A refractory material 16B for replacement is attached to the other arm 1 in advance. This replacement refractory 16B is
The refractory exchange device 50 may be fixed after being fixed at the predetermined position, or may be attached in advance.

Next, in the process shown in FIG. 19, the piston 6 of the arm moving mechanism 3 for moving the arm 1 for removing the used refractory material 16 from the tundish 13 is processed in the same manner as in the second embodiment. It operates and moves the arm 1 toward the refractory material 16 of the tundish 13, and inserts the arm 1 into the fluid outflow hole 19. At this time, the detention / release mechanism 2
Also operates in the same manner as in the second embodiment, and the hooking mechanism 1C is built in the rod 7. By doing so, when the arm 1 is inserted into the fluid outflow hole 19 of the tundish 13, the hooking mechanism 1C does not get in the way, and smooth insertion can be performed.

Then, in the step shown in FIG.
Similarly, after holding the refractory 16 with the arm 1, the piston 6 of the arm moving mechanism 3 is held in the tundish 1.
Pull the refractory material 16 out of the tundish 13 by pulling it in the opposite direction to 3. In this way, the refractory exchange device 50
By using, it was possible to safely and automatically remove the refractory material 16 from the tundish 16 in the hot state in a short time.

Next, in the step shown in FIG. 21, after the fluid outlet hole 19 is cleaned by a tuyere cleaning device (not shown) connected to the refractory material exchanging device 50, the rotating mechanism 25 is operated to operate the refractory material. The exchanging device 50 is rotated by 90 degrees, and the arm 1 to which the exchanging refractory 16B is attached is set to the tundish 13 side. Next, in the step shown in FIG.
Similarly to the step shown in FIG. 5, the arm 1 to which the replacement refractory material 16B is attached is operated in the same manner as in Example 2 to move the arm 1 toward the fluid outflow hole 19 of the tundish 13. After inserting the arm 1 into the fluid outflow hole 19 and attaching the replacement refractory 16B to a predetermined position of the tundish 13, the replacement refractory 16B is opened and the arm 1 is returned to the predetermined position. Then, after that, the refractory material 16 is opened and discarded at a predetermined position.

In this way, by using the refractory exchange device 50, the exchange refractory can be safely and automatically attached to the hot tundish 16 in a short time. .. Then, the refractory exchanging device 50 according to the present embodiment.
Since the refractory material 16 can be extracted and the replacement refractory material 16B can be continuously attached, the work efficiency can be further improved.

Although the arm 1 having the same structure as that of the second embodiment is used in the present embodiment, the present invention is not limited to this, and the arm 1 having the structure introduced in the first embodiment may of course be used. is there. Further, although two arms 1 are installed in the present invention, the present invention is not limited to this, and two or more arms 1 may be installed if desired. In addition, in the present embodiment, the arms 1 are provided at 90 degrees apart, but the present invention is not limited to this, and the arms 1 are spaced at 72 degrees (pentahedral) or 60 degrees (octahedral).
Etc., the arms 1 may be set at arbitrary angles.

[0048]

As described above, according to the first aspect of the invention, the refractory exchanging device is provided with one or two pairs of arms capable of holding and releasing the refractory and a moving mechanism for moving the arms. Using, by automatically performing refractory replacement, the refractory replacement work is all automatically performed by the refractory replacement device, during work, from within the hot tundish, Even if heat and gas are ejected, there is no danger in the work. Further, when the refractory material is replaced, since the fluid outflow holes of the tundish are oriented sideways or upward, molten steel does not flow down from the fluid outflow holes. Therefore, the tundish refractory in the hot state can be replaced safely and in a short time, so that the work efficiency can be improved.

According to the second aspect of the present invention, the fireproof device includes a plurality of arms capable of holding and releasing the refractory material, a rotating mechanism for controlling the direction of the arms, and a moving mechanism for moving the arms. By automatically exchanging refractories using the object exchanging device, you can arbitrarily change the advancing direction of the arm with the refractory for replacement and the arm that removes the refractory attached to the tundish. can do. Therefore, as a result that the refractory can be removed and the refractory for replacement can be continuously attached, the refractory of the tundish in the hot state can be replaced in a shorter time in addition to the above effect. Therefore, the working efficiency can be further improved.

Furthermore, since the refractory exchanging device has a rotating mechanism for controlling the direction of the arm, the arm can be efficiently moved to any position. Therefore, since the replacement refractory supply position and the refractory disposal position can be set arbitrarily, the working range can be minimized. Further, according to the invention of claim 3, the refractory can be freely and automatically transported between the arm holding the refractory and opening it and the tundish, and the refractory is automatically replaced. As a result, the refractory of the tundish in the hot state can be replaced safely and in a short time, so that the work efficiency can be improved.

Further, according to the invention of claim 4, the arm can be arbitrarily changed between the arm holding the refractory and opening the arm and the tundish to automatically convey the refractory. Therefore, in addition to the above effects, the refractory can be automatically and continuously replaced. Furthermore, since the replacement refractory supply position and the refractory disposal position can be arbitrarily set, the work range can be minimized.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a refractory exchange device according to a first embodiment of the present invention.

FIG. 2 is a process diagram showing a method for exchanging refractory materials in a tundish using the refractory material exchanging device shown in FIG.

FIG. 3 is a process diagram showing a method for exchanging refractory materials in a tundish using the refractory material exchanging device shown in FIG.

FIG. 4 is a process diagram showing a method for exchanging refractory materials in a tundish using the refractory material exchange apparatus shown in FIG.

FIG. 5 is a schematic cross-sectional view showing another refractory exchange device according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram showing the structure of another holding / releasing mechanism according to the first embodiment of the present invention.

FIG. 7 is a process diagram showing a method for exchanging refractory materials of a tundish using the refractory material exchanging device according to the second embodiment of the present invention.

FIG. 8 is a process diagram showing a method for exchanging refractory materials of a tundish using the refractory material exchanging device according to the second embodiment of the present invention.

FIG. 9 is a process diagram showing a method for exchanging refractory materials of a tundish using the refractory material exchanging device according to the second embodiment of the present invention.

FIG. 10 is an enlarged view showing a state in which the arm 1 opening function of the refractory exchange device according to the second embodiment of the present invention is provided.

FIG. 11 is an enlarged view showing a state in which the arm 1 holding function of the refractory exchange device according to the second embodiment of the present invention is added.

FIG. 12 is a configuration diagram showing the structure of another holding and releasing mechanism according to the second embodiment of the present invention.

FIG. 13 is a configuration diagram showing the structure of another holding and releasing mechanism according to the second embodiment of the present invention.

FIG. 14 is a sectional view showing another embodiment according to the second embodiment of the present invention.

FIG. 15 is a sectional view showing another embodiment according to the second embodiment of the present invention.

FIG. 16 is a plan view of a refractory exchange device according to a third embodiment of the present invention.

17 is a cross-sectional view taken along the line AA of the refractory exchange device shown in FIG.

FIG. 18 is a process diagram showing a method for exchanging refractory materials of a tundish using the refractory material exchanging device according to the third embodiment of the present invention.

FIG. 19 is a process diagram showing a method for exchanging refractory materials of a tundish using the refractory material exchanging device according to the third embodiment of the present invention.

FIG. 20 is a process diagram showing a method for exchanging refractory materials for a tundish using the refractory material exchanging device according to the third embodiment of the present invention.

FIG. 21 is a process diagram showing a method of exchanging refractory materials for a tundish using the refractory material exchanging device according to the third embodiment of the present invention.

FIG. 22 is a process drawing showing a method for exchanging refractory materials of a tundish using the refractory material exchanging device according to the third embodiment of the present invention.

[Explanation of symbols]

 1 Arm 1A Upper Arm 1B Lower Arm 1C Hooking Mechanism 2 Holding / Opening Mechanism 3 Arm Moving Mechanism 4 Main Body 5 Wheels 6 Piston 7 Rod 8 Cylinder 9 Rod 10 Cylinder 11 Piston 12 Support Point 13 Tundish 14 Tundish Lid 15 Flow Control Device 16 Refractory 16B Replacement Refractory 17 Refractory Support Frame 18 Flow Control Actuator 19 Fluid Outflow Hole 20 Worm 21 Worm Gear 22 Worm Up Gear 23 Tundish Holding Guide 24 Refractory Pushing Block 25 Rotating Device 26 Cart 50 Refractory Replacement apparatus

Claims (4)

[Claims] 1. A method for exchanging a refractory material for a flow control device for a tundish of a continuous casting apparatus, wherein a fluid outflow hole of the tundish to which the flow control device and the refractory material are attached is directed sideways or upward. Using a refractory exchange device equipped with one or two pairs of arms capable of holding and releasing the arm and a moving mechanism for moving the arm, the arm is moved toward the refractory and the arm holds the refractory. With holding, pull out the refractory from the tundish, hold the replacement refractory with the arm or another arm, move the arm toward the refractory installation position of the tundish, A tundish refractory replacement method comprising attaching a replacement refractory to the tundish and releasing the tundish from the arm. 2. A method of exchanging a refractory material for a flow control device for a tundish of a continuous casting apparatus, wherein a fluid outflow hole of the tundish to which the flow control device and the refractory material are attached is turned sideways or upward. A refractory replacement device including a plurality of arms capable of holding and releasing the arm, a rotating mechanism for controlling the direction of the arm, and a moving mechanism for moving the arm is used. After holding the refractory attached to the tundish and removing the refractory from the tundish, the other arm is moved toward the refractory of the tundish. , The arm holding the replacement refractory is rotated so as to face the refractory installation position of the tundish and moved at the opposing position to place the replacement refractory in the tundish. While attached to, refractory replacement method tundish, characterized in that releasing from the arm. 3. A tongue comprising: one or two pairs of arms for holding and releasing a refractory; and a moving mechanism for moving the arms between the arms and the tundish. Dish refractory changer. 4. A plurality of arms for holding and opening a refractory, a rotating mechanism for controlling the direction of the arms, and a moving mechanism for moving the arms between the arms and the tundish. Tundish refractory exchange device characterized by: