KR102573696B1 - Apparatus for exchanging fireproof sleeve of smelting furnace - Google Patents

Abstract

The present invention relates to a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve detachably coupled to a tapping orifice of a melting furnace. An apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention is a replacement apparatus for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tap of a melting furnace, comprising: a working frame disposed at a lower side of the melting furnace; a puller assembly movably supported on the working frame so as to pull the refractory sleeve towards the working frame and separate it from melting; and a pusher assembly movably supported on the work frame so as to lift the new fireproof sleeve toward the exit.

Description

Replacement device for refractory sleeve for melting furnace {APPARATUS FOR EXCHANGING FIREPROOF SLEEVE OF SMELTING FURNACE}

The present invention relates to a replacement device for a refractory sleeve for a melting furnace, and more particularly, to a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve detachably coupled to a tap of a melting furnace.

The process of producing molten steel using scrap or scrap is generally to use a melting furnace such as an Electrical Arc Furnace (EAF). That is, when the target scrap is charged into the electric furnace and the object is completely melted using electric power to reach the tapping state, a ladle for transporting molten steel is placed at the bottom of the tapping port of the electric furnace and the molten steel is tapped.

A fireproof sleeve is installed at the tapping hole of the electric furnace to protect the periphery of the tapping hole from high-temperature molten steel passing through the tapping hole. Fireproof sleeves must be replaced after a certain number of uses.

In general, it is known that when the number of taps in an electric furnace reaches about 100 times, the life of the refractory sleeve ends and replacement work must be performed. In the case of operating the electric furnace 24 hours a day, the time for one tap cycle of the electric furnace is about 1 hour, and the replacement cycle of the fireproof sleeve is about 4 to 5 days. Therefore, in the operation of the electric furnace, the frequency of replacement of the refractory sleeve is high, and the work intensity according to the replacement of the refractory sleeve is quite high.

Conventionally, the fireproof sleeve was replaced by manual work by a worker and crushing work by an excavator in parallel. That is, after completely tapping the molten steel in the electric furnace, forcibly cooling the refractory inside the electric furnace to create a working environment, slag and fused refractories (brick) fused to the upper part of the tap through crushing work using an excavator & stamp), the operator manually separated the fireproof sleeve from the bottom of the electric furnace.

These conventional methods have a high risk of safety accidents. In addition, the operation of the excavator at height is very dangerous, and considerable difficulties occur in the management of falling objects and flying objects during the operation. Therefore, there are problems in that the operator's work intensity is high, excessive work time and equipment costs are required, and the down time of the electric furnace is long.

KR 20-0451557 Y1 (2010.12.15.)

The problem to be solved by the present invention is to provide a replacement device for a refractory sleeve for a melting furnace, which can improve the productivity of a melting furnace by reducing the intensity of the replacement work of the refractory sleeve, improving the working environment, and ensuring the safety, speed and efficiency of the work. is to provide

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, an apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention is a replacement apparatus for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tap of the melting furnace. Working frame disposed on the lower side of; a puller assembly movably supported on the working frame to separate the fireproof sleeve from the melting by pulling it towards the working frame; and a pusher assembly movably supported on the work frame so as to lift the new fireproof sleeve toward the exit.

Each of the puller assembly and the pusher assembly may be supported on the work frame such that the puller assembly faces the tap hole or the pusher assembly faces the tap hole.

An apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention includes a support frame movably supported on the working frame, and the puller assembly and the pusher assembly are movably coupled to the support frame. can

An apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention may include at least one working actuator for providing a moving force for moving the puller assembly and the pusher assembly up and down.

The working actuator may be selectively connectable to the puller assembly or the pusher assembly, and may be connected to the puller assembly to provide a moving force to the puller assembly when the puller assembly faces the outlet, and the pusher assembly When facing the tap hole, it may be connected to the pusher assembly to provide a moving force to the pusher assembly.

The work actuator includes a coupling head detachably connected to the puller assembly or the pusher assembly, the puller assembly includes a puller coupling block detachably connected to the coupling head, and the pusher assembly A pusher coupling block detachably connected to the coupling head may be included.

The puller coupling block may include a puller coupling groove into which the coupling head is inserted, and the pusher coupling block may include a pusher coupling groove into which the coupling head is inserted.

The puller assembly may include a puller base supporting a lower end of the fireproof sleeve; and a puller guide bar coupled to the puller base so as to be linearly movably supported on the support frame, wherein the pusher assembly includes: a pusher base capable of supporting a lower end of the new fireproof sleeve; and a pusher guide bar coupled to the pusher base so as to be linearly movably supported on the support frame.

An apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention may include a motion actuator connected to the support frame to move the support frame.

On the other hand, in order to solve the above problems, a replacement device for a refractory sleeve for a melting furnace according to another embodiment of the present invention is a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tap of a melting furnace, a work frame disposed below the melting furnace; a puller assembly movably supported on the working frame to separate the fireproof sleeve from the melting by pulling it toward the working frame; and a working actuator for providing a moving force for elevating the puller assembly.

The puller assembly may include a puller base supporting a lower end of the fireproof sleeve; a puller body supported on the puller base so as to pass through the fireproof sleeve hole of the fireproof sleeve; and a hook provided on the puller body so as to come into contact with an upper end of the fireproof sleeve and pull the fireproof sleeve toward the working frame.

The hook may be configured to change its posture into a first posture in which it can pass through the hole of the fire resistant sleeve and a second posture in which it can come into contact with an upper end of the fire resistant sleeve.

The puller assembly may include an elastic member that applies an elastic force to the hook so that the hook is changed to the second posture.

In order to solve the above problems, an apparatus for replacing a fireproof sleeve for a melting furnace according to an embodiment of the present invention may include a dustproof membrane member disposed between the working frame and the melting furnace so as to surround the puller base. .

On the other hand, in order to solve the above problems, a replacement device for a refractory sleeve for a melting furnace according to another embodiment of the present invention is a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tap of a melting furnace. , base frame; a work frame movably supported on the base frame so as to advance toward or retreat from the fire resistant sleeve; a lifting actuator supported by the base frame to provide a moving force to the working frame; a puller assembly movably supported on the working frame to separate the fireproof sleeve from the melting by pulling it toward the working frame; and a pusher assembly movably supported on the work frame so as to lift the new fireproof sleeve toward the exit.

An apparatus for replacing a refractory sleeve for a melting furnace according to another embodiment of the present invention includes a sliding ladder connecting a base stage provided on the base frame and a work stage provided on the work frame higher than the base stage, The sliding ladder may be slidably coupled to the work frame so that a position of a lower end supported by the base frame may be changed according to the movement of the work stage.

The sliding ladder includes a ladder body including a plurality of supports on which a worker can step; and a caster provided at a lower end of the ladder body to contact the base stage, wherein the work frame may include an inclined guide disposed inclined downward toward the base stage to slidably support the ladder body. can

An apparatus for replacing a fireproof sleeve for a melting furnace according to another embodiment of the present invention includes a transport vehicle supporting the base frame, wherein the transport vehicle includes: a vehicle body to which the base frame is detachably coupled; and a plurality of wheels provided on the commercial vehicle body so as to be in contact with a rail disposed below the melting furnace and perform rolling motion.

According to the present invention, since both the puller assembly for separating the refractory sleeve and the pusher assembly for installing the new refractory sleeve into the melting furnace are installed in the working space where the operator is located, the replacement of the refractory sleeve can be performed quickly and efficiently, , the downtime of the melting furnace can be minimized.

In addition, according to the present invention, it is possible to greatly reduce the work intensity of the operator and reduce the risk of safety accidents by providing a safe working environment.

In addition, according to the present invention, the operation efficiency of the melting furnace is seriously reduced due to the frequent replacement of the refractory sleeve due to the relatively short service life of the refractory sleeve, and the situation in which the working time is excessively long is improved. There is a significant reduction effect.

The various and advantageous advantages and effects of the present invention are not limited to the above, and more various effects are included in the present specification.

1 is a side view showing a state in which a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention is disposed on the lower side of a melting furnace.
2 is a perspective view showing a state in which a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention is disposed on the lower side of a melting furnace.
3 is an exploded perspective view of a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention.
4a and 4b are perspective views illustrating a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention.
5A and 5B are front views showing a cut-away device for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention.
6a and 6b are rear views showing a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention.
7a and 7b are side views showing a cut-away device for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention.
8A to 8E show operations of a puller assembly and a pusher assembly of an apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention.
9a to 9f show a process of replacing a refractory sleeve using the apparatus for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention.

Hereinafter, an apparatus for replacing a refractory sleeve for a melting furnace according to the present invention will be described in detail with reference to the drawings.

1 is a side view showing a state in which a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention is disposed on the lower side of a melting furnace, and FIG. 2 is a side view showing a replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention. Figure 3 is a perspective view showing a disassembled replacement device for a refractory sleeve for a melting furnace according to an embodiment of the present invention.

The apparatus 100 for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention is for replacing the refractory sleeve 20 detachably disposed at the tapping port 11 of the melting furnace 10 . Hereinafter, as shown in the drawings, the apparatus 100 for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention is used to replace a refractory sleeve 20 provided in an electric furnace type melting furnace 10 as an example. listen and explain

The refractory sleeve 20 is inserted into the melting furnace 10 to protect the periphery of the tapping port 11 of the melting furnace 10 . As shown, the fireproof sleeve 20 may be formed in a hollow shape in which a plurality of fireproof bricks are stacked on a lower plate. A refractory sleeve hole 21 through which molten steel melted in the melting furnace 10 can pass is provided at the center of the refractory sleeve 20 . The refractory sleeve 20 may be fixed to the melting furnace 10 by a fixing pin or various locking devices.

An apparatus for replacing a refractory sleeve for a melting furnace 100 according to an embodiment of the present invention includes a base frame 101, a work frame 118 movably supported by the base frame 101, and a base frame 101. A sliding ladder 134 connecting the working frame 118, a puller assembly 140 for separating the used refractory sleeve 20 from the melting furnace 10, and a puller assembly 140 disposed on the working frame 118 ), a pusher assembly 156 for mounting the new refractory sleeve 30 to the melting furnace 10, and a support frame supporting the puller assembly 140 and the pusher assembly 156. (163).

As shown in the figure, the replacement device 100 for the refractory sleeve for the melting furnace is placed on the rail 40 disposed at the bottom of the melting furnace 10 and moves along the first direction D1 to a working position at the bottom of the melting furnace 10. or move out of the working position. Further, the puller assembly 140, the pusher assembly 156, and the support frame 163 can be moved along the second direction D2 perpendicular to the first direction D1 and their positions on the working frame 118 can be changed. there is. In addition, the working frame 118 is moved closer to the tapping port 11 of the melting furnace 10 by moving up and down along the third direction D perpendicular to the first direction D1 and the second direction D2, or tapping It can be moved away from the sphere (11).

The base frame 101 supports the working frame 118 to be movable up and down. The base frame 101 includes a lower frame 102, an upper frame 103 supported by the lower frame 102, and a base stage 109 supported by the upper frame 103 so that the operator W can stand on it. includes The upper frame 103 includes a plurality of support beams 104, and a plurality of lifting guides 106 for guiding the working frame 118 are installed on the plurality of support beams 104.

A plurality of lifting guides 106 are spaced apart to guide the working frame 118 so that the working frame 118 can stably move linearly without shaking. The lifting guide 106 includes a support body 107 fixed to the support beam 104 and a guide roller 108 supported by the support body 107 . A plurality of guide rollers 108 may be spaced apart from each other. These plurality of guide rollers 108 may be coupled to the support body 107 at different arrangement angles so as to contact various surfaces of the work frame 118 . The lifting guide 106 may guide the work frame 118 to be stably raised and lowered by the guide roller 108 coming into contact with the work frame 118 .

In the drawing, four lifting guides 106 are shown as being disposed to come into contact with different parts of the working frame 118, but the installation number or location of the lifting guides 106 may be variously changed. In addition, the lifting guide 106 may be formed in various other forms that can guide the working frame 118 to be lifted in contact with the working frame 118 in addition to the form including the guide roller 108 .

The base frame 101 may be changed into various other forms capable of supporting the work frame 118 in an elevating manner other than the illustrated form.

The base frame 101 may be mounted on the transport vehicle 110 and moved. The transport vehicle 110 includes a vehicle body 111 to which the base frame 101 is detachably coupled, and a plurality of wheels 113 provided on the vehicle body 111 .

An opening 112 into which the base frame 101 can be partially inserted is formed inside the vehicle body 111 . A pair of recesses 114 into which the lower frame 102 of the base frame 101 can be inserted are provided on the inner surface of the vehicle body 111 . The base frame 101 may be installed in the transport vehicle 110 in such a way that both ends of the lower frame 102 are inserted into a pair of recesses 114 . The base frame 101 can be stably fixed to the transport vehicle 110 by inserting the lower frame 102 into the recess 114 . In addition, the base frame 101 can be simply installed on the transport vehicle 110 or separated from the transport vehicle 110 by a lifting device such as a crane. If necessary, the base frame 101 may be fixed to the transport vehicle 110 by various locking devices after being mounted on the transport vehicle 110 .

The wheel 113 of the transport vehicle 110 is configured to roll in contact with the rail 40 disposed below the melting furnace 10 . As shown in the drawing, the transport vehicle 110 may move along the rail 40 with the base frame 101 mounted thereon.

The transport vehicle 110 may be configured to include its own power source, or may be configured to be moved by a separate towing device without including a power source. In addition, the transport vehicle 110 may be configured to be controlled by the controller 185 (Overhead Crane Remote Controller) or may include a control unit that can be operated by the operator W to control the movement of the transport vehicle 110. can In addition, the transport vehicle 110 may be formed in various other forms capable of transporting the base frame 101 in addition to the form moving along the rail 40 as shown.

A lower ladder 115 and an intermediate ladder 116 are detachably coupled to the base frame 101 . The lower ladder 115 may be arranged so that its lower end is positioned slightly above the rail 40 . The intermediate ladder 116 may be disposed higher than the lower ladder 115 to connect the lower ladder 115 and the base stage 109 .

The work frame 118 is supported on the base frame 101 so as to be able to move up and down. The work frame 118 includes a plurality of lifting beams 119 and a work stage 122 supported by the plurality of lifting beams 119 .

A plurality of lifting beams 119 extend in the lifting direction of the work frame 118 . Each lifting beam 119 is provided with a lifting guide rail 120 to which the guide roller 108 of the lifting guide 106 contacts. The work frame 118 can stably move up and down without shaking as the plurality of lifting guide rails 120 are guided by the plurality of lifting guides 106 . The number or shape of the lifting beams 119 may be variously changed according to the number or shape of the lifting guides 106 . In addition, a connection method between the lifting beam 119 and the lifting guide 106 may be variously changed.

The work stage 122 may include a flat upper surface on which the operator W can stand. A work space is provided on the work stage 122 where the operator W can separate the fire resistant sleeve 20 or install a new fire resistant sleeve 30 . An opening 123 for installing the puller assembly 140 and the pusher assembly 156 is provided in the middle of the work stage 122 . Support frame guide rails 125 for guiding the support frame 163 are disposed on both sides of the opening 123 . The opening 123 may be covered by a support frame 163 and a cover assembly 176 . At the edge of the work stage 122, a safety fence 126 for the safety of the operator W performing work on the work stage 122 is installed.

In addition, the working frame 118 includes an inclined guide 128 for guiding the sliding ladder 134. The inclined guide 128 is disposed inclined downward toward the base stage 109 to support the sliding ladder 134 in a sliding manner.

The working frame 118 can move forward toward the fireproof sleeve 20 installed in the melting furnace 10 or retreat from the fireproof sleeve 20 by moving up and down by the lifting actuator 130 installed on the base frame 101 . 5A and 5B, the lifting actuator 130 includes a body 131 fixed to the base frame 101 and a lifting rod movably provided to the body 131 so as to be connected to the working frame 118. (132). The lifting actuator 130 can raise the work frame 118 as the lifting rod 132 is withdrawn from the body 131, and the work frame 118 is lifted as the lifting rod 132 is drawn into the body 131. can be lowered

A plurality of lifting actuators 130 may be installed so that the work stage 122 can be stably moved up and down while maintaining a horizontal posture. In the drawings, two lifting actuators 130 are shown as being connected to both ends of the work frame 118, but the number or installation position of the lifting actuators 130 may be variously changed. The lifting actuator 130 may be controlled by a controller 185 (Overhead Crane Remote Controller) that can be operated by an operator W on board the apparatus 100 for replacing a fireproof sleeve for a melting furnace. As another example, the lifting actuator 130 may be controlled by a remote manager. As the lifting actuator 130, a hydraulic cylinder or various types of actuators capable of providing a linear moving force to the work frame 118 may be used.

4A, 5A, 6A, and 7A show a state in which the work frame 118 is lowered, and FIGS. 4B, 5B, 6B, and 7B show a state in which the work frame 118 is raised. As shown in these figures, when the working frame 118 is provided with a moving force in the vertical direction by the lifting actuator 130, a plurality of lifting beams 119 are guided by a plurality of lifting guides 106, thereby performing work. The frame 118 can stably move up and down without shaking.

In this way, the working frame 118 excludes the structurally weak X-Cross Lifting method and adopts a method in which the lifting beam 119 extending in the lifting direction is guided by the lifting guide 106, thereby replacing the fireproof sleeve. It can stably withstand the load generated from the load and can be raised and lowered stably without vibration or structural deformation. Therefore, the safety of the worker W performing the work on the working frame 118 can be guaranteed.

In addition, since the lifting guide 106 for guiding the work frame 118 includes a guide roller 108 in contact with the lifting beam 119, the work frame 118 can stably move up and down without vibration or shaking, The position of the working frame 118 can be more precisely controlled.

The sliding ladder 134 connects the base stage 109 of the base frame 101 and the work stage 122 of the work frame 118. The sliding ladder 134 is slidably coupled to the working frame 118 . The lower end of the sliding ladder 134 is supported on the base stage 109 and can slide according to the height change of the working frame 118 . When the sliding ladder 134 slides, the position of the lower end of the sliding ladder 134 on the base stage 109 is changed.

The sliding ladder 134 includes a ladder body 135, a caster 137 provided at the lower end of the ladder body 131, and a plurality of guide wheels 138 sequentially disposed on both sides of the ladder body 135. do. The ladder body 135 includes a plurality of supports 136 on which the operator W can step. The caster 137 can move on the base stage 109 in contact with the base stage 109 . A plurality of guide wheels 138 may come into contact with the inclined guide 128 of the working frame 118 .

As shown in FIG. 6A, the sliding ladder 134 is coupled to the working frame 118 so that the casters 137 abut the base stage 109. As shown in FIG. 6B , when the working frame 118 rises, the sliding ladder 134 can slide from the working frame 118 . At this time, the caster 137 moves on the base stage 109 and the plurality of guide wheels 138 are guided in contact with the inclined guide 128, so that the sliding ladder 134 can slide smoothly. In this way, the sliding ladder 134 slides according to the movement of the working frame 118, so that the base stage 109 and the working stage 122 can be stably connected even when the height of the working frame 118 changes. Therefore, the movement of the operator W using the sliding ladder 134 can be made smoothly.

In addition to the illustrated form, the sliding ladder 134 may be changed into various other forms capable of relative movement with respect to the working frame 118 according to the movement of the working frame 118 . In addition, the sliding ladder 134 may be configured to be connected to the working frame 118 to be slidable without a plurality of guide wheels 138 .

The puller assembly 140 is installed on the working frame 118 so that the refractory sleeve 20 installed in the melting furnace 10 can be pulled toward the working frame 118 and separated from the melting furnace 10 . As shown in FIGS. 4A and 8A , the puller assembly 140 includes a puller base 141 , a puller body 146 , a plurality of hooks 148 , and a puller guide bar 152 .

The puller base 141 is disposed on the support frame 163 to support the lower end of the fire resistant sleeve 20 . The puller base 141 may include a flat upper surface on which the lower end of the fire resistant sleeve 20 is placed. The puller base 141 is supported on the support frame 163 so as to be able to move up and down, and can support the refractory sleeve 20 separated from the melting furnace 10 and transport it toward the work stage 122 .

A puller coupling block 143 is provided on the lower surface of the puller base 141 . A puller coupling groove 144 is provided in the puller coupling block 143 . The puller coupling block 143 may be detachably connected to a work actuator 178 to be described later. The puller coupling groove 144 is disposed parallel to the movement direction of the support frame 163 and may be formed in an open form from both ends of the puller coupling block 143 .

The puller body 146 is disposed at the center of the puller base 141 so as to pass through the fire resistant sleeve hole 21 of the fire resistant sleeve 20 . The width of the puller body 146 is smaller than that of the fireproof sleeve hole 21 so as to stably pass through the fireproof sleeve hole 21 . A puller head 147 for supporting a plurality of hooks 148 is provided at an upper end of the puller body 146 .

A plurality of hooks 148 are supported on the puller head 147 so as to contact the upper end of the fire resistant sleeve 20 . The plurality of hooks 148 may pull the fire resistant sleeve 20 toward the work frame 118 when the puller base 141 descends by contacting the upper end of the fire resistant sleeve 20 . As shown in FIG. 4A , the hook 148 is configured to change its posture between a first posture capable of passing through the fire resistant sleeve hole 21 and a second posture capable of contacting the upper end of the fire resistant sleeve 20 . That is, the hook 148 is coupled to the puller head 147 so as to rotate at a certain angle around the pivot pin 149 while being elastically supported by the elastic member 150 . The elastic member 150 may apply elastic force to the hook 148 so that the hook 148 changes its posture to the second posture. The first posture may represent a folded posture such that the hook 148 can pass through the fireproof sleeve hole 21, as indicated by a dotted line in FIG. 4A. The second posture may represent a posture in which the hook 148 is unfolded so as to contact the upper end of the fireproof sleeve 20, as indicated by a solid line in FIG. 4A.

When the puller base 141 rises toward the fireproof sleeve 20 installed in the melting furnace 10 and the puller body 146 passes through the fireproof sleeve hole 21 of the fireproof sleeve 20, a plurality of hooks 148 may be folded into the first posture while elastically deforming the elastic member 150 in contact with the inner surface of the fireproof sleeve 20 . The hook 148 folded in the first posture may smoothly pass through the fireproof sleeve hole 21 . After completely passing through the fireproof sleeve hole 21, the hook 148 is unfolded into the second posture by the elastic force of the elastic member 150. When the puller base 141 descends, the hook 148 extended by the elastic member 150 does not pass through the fire resistant sleeve hole 21 and comes into contact with the upper end of the fire resistant sleeve 20 to pull the fire resistant sleeve 20. there is.

The shape or number of hooks 148 may be variously changed. In addition, the hook 148 may be configured to change its posture between the first posture and the second posture in various other ways. As another embodiment, the hook 148 may be installed in the puller body 146 to be drawn out or retracted.

The puller guide bar 152 extends downward from the lower surface of the puller base 141 . The puller guide bar 152 is supported by the support frame 163 to be linearly movable, thereby guiding the puller base 141 to stably move up and down. A pair of puller guide bars 152 may be disposed on both sides of the center of the puller base 141 . As another modification, the number or position of the puller guide bar 152 may be variously changed.

As described above, the puller assembly 140 moves the fireproof sleeve 20 coupled to the melting furnace 10 toward the work frame 118 by descending while the plurality of hooks 148 are in contact with the upper end of the fireproof sleeve 20. can attract As the plurality of hooks 148 pull the refractory sleeve 20, the refractory sleeve 20 is separated from the melting furnace 10, and the refractory sleeve 20 separated from the melting furnace 10 is placed on the puller base 141. It can be stably transported toward the work stage 122 .

The puller assembly 140 may be changed into various other shapes that can separate the refractory sleeve 20 from the melting furnace 10 by pulling the refractory sleeve 20 in addition to the illustrated shape.

In the course of the puller assembly 140 separating the refractory sleeve 20 from the melting furnace 10, foreign substances such as slag may fall from the melting furnace 10. Falling objects from the melting furnace 10 may threaten the safety of the operator W working on the work stage 122, contaminate the work stage 122 or the area around the replacement device 100 for the refractory sleeve for the melting furnace, It may reach various parts of the replacement device 100 for the refractory sleeve for the melting furnace and cause failure of the replacement device 100 for the refractory sleeve for the melting furnace.

To prevent this problem, the puller assembly 140 may operate in a state surrounded by the dustproof membrane member 154 . As shown in FIGS. 9A to 9C , the dustproof membrane member 154 may be disposed between the working frame 118 and the melting furnace 10 so as to surround a portion of the puller assembly 140 located on the working stage 122. there is. The dustproof membrane member 154 may be disposed on the support frame 163 so that its upper end comes into contact with the melting furnace 10 and wraps around the tap hole 11 . The dustproof membrane member 154 may be formed in a foldable form. The dustproof membrane member 154 may be installed by the operator W. The worker W may place the dustproof membrane member 154 on the work stage 122 in a folded state, and may unfold the dustproof membrane member 154 to wrap the puller assembly 140 with the dustproof membrane member 154 .

The pusher assembly 156 is movably supported on the working frame 118 so as to lift the new refractory sleeve 30 toward the tapping port 11 of the melting furnace 10 . As shown in FIG. 8A , the pusher assembly 156 includes a pusher base 157 and a pusher guide bar 161 .

A pusher base 157 is placed on the support frame 163 to support the lower end of the new fire resistant sleeve 30. The pusher base 157 may include a flat upper surface upon which the lower end of the new refractory sleeve 30 rests. The pusher base 157 is supported by the support frame 163 so as to be able to move up and down, and can lift the new refractory sleeve 30 toward the tapping port 11 of the melting furnace 10 by supporting it.

A pusher coupling block 158 is provided on the lower surface of the pusher base 157 . A pusher coupling groove 159 is provided in the pusher coupling block 158 . The pusher coupling block 158 may be detachably connected to the working actuator 178 . The pusher coupling grooves 159 are disposed parallel to the movement direction of the support frame 163 and may be open from both ends of the pusher coupling block 158 . The pusher coupling groove 159 may be disposed on a straight line parallel to the movement direction of the puller coupling groove 144 of the puller coupling block 143 and the support frame 163 .

The pusher guide bar 161 extends downward from the lower surface of the pusher base 157 . The pusher guide bar 161 is supported by the support frame 163 to be linearly movable, thereby guiding the pusher base 157 to be moved up and down stably. Like the puller guide bars 152 of the puller assembly 140, a pair of pusher guide bars 161 may be disposed on both sides of the center of the pusher base 157. As another modification, the number or location of the pusher guide bars 161 may be variously changed.

As described above, after the refractory sleeve 20 is separated from the melting furnace 10 by the puller assembly 140, the pusher assembly 156 inserts a new refractory sleeve 30 into the tapping port 11 of the melting furnace 10. It can be stably lifted to the side and inserted into the tap hole 11. After the new refractory sleeve 30 is inserted into the tap hole 11, the worker W may fix the new refractory sleeve 30 to the melting furnace 10 with a fixing pin or a locking device. The pusher assembly 156 may be controlled to lower to an original position after the new refractory sleeve 30 is fixed to the melting furnace 10 .

The pusher assembly 156 may be changed into various other shapes in which the new refractory sleeve 30 can be raised toward the tap hole 11 of the melting furnace 10 and inserted into the tap hole 11, in addition to the shown shape.

The support frame 163 is supported on the work frame 118 so as to be movable in a direction crossing the elevating directions of the puller assembly 140 and the pusher assembly 156 on the opening 123 of the work stage 122 . The support frame 163 supports the puller assembly 140 and the pusher assembly 156 to be movable.

As shown in FIG. 8A , a first hole 164 and a second hole 165 are formed in the support frame 163 to pass through the support frame 163 . The first hole 164 and the second hole 165 are sequentially arranged along the moving direction of the support frame 163 . The puller coupling block 143 of the puller assembly 140 may be inserted into the first hole 164 , and the pusher coupling block 158 of the pusher assembly 156 may be inserted into the second hole 165 . Also, the work rod 180 of the work actuator 178 may pass through the first hole 164 or the second hole 165 .

Support frame guide blocks 166 slidably coupled to the support frame guide rails 125 of the work frame 118 are provided at both edges of the support frame 163 . The support frame 163 can stably move linearly as the plurality of support frame guide blocks 166 slide along the support frame guide rail 125 .

On the lower surface of the support frame 163, a guide bushing 168 that slidably supports the puller guide bar 152 of the puller assembly 140 and the pusher guide bar 161 of the pusher assembly 156 are slidably supported. A guide bushing 169 is provided. The guide bushing 168 may be made of a hollow shape so that the puller guide bar 152 may pass therethrough and may be disposed to pass through the support frame 163 . The guide bushing 169 may be made of a hollow shape so that the pusher guide bar 161 may pass therethrough, and may be disposed to pass through the support frame 163 .

The support frame 163 is the first position where the puller assembly 140 faces the tap hole 11 of the melting furnace 10 by the motion actuator 172 installed on the working frame 118 or the pusher assembly 156 is It can move to the second position facing the tap hole 11 . 8a, 8b, and 9a to 9c show a state in which the support frame 163 is located in the first position. Separating the refractory sleeve 20 from the melting furnace 10 may be performed when the support frame 163 is located in the first position. 8D, 8E, and 9D to 9F show a state in which the support frame 163 is located in the second position. Installing the new refractory sleeve 30 to the melting furnace 10 may be performed when the support frame 163 is located in the second position.

As shown in FIG. 2 , the support frame 163 is connected to a cover assembly 176 covering the opening 123 of the work stage 122 . The cover assembly 176 includes a plurality of sliding covers 177 arranged to be sequentially connected along the moving direction of the support frame 163 . A plurality of sliding covers 177 are slidably disposed on the work stage 122 so that they can be sequentially overlapped. The cover assembly 176 may change its length according to the movement and overlapping of the plurality of sliding covers 177 .

When the support frame 163 is located in the first position, the length of the cover assembly 176 is increased so that the opening 123 of the work stage 122 can be completely covered by the support frame 163 and the cover assembly 176. . Therefore, when the refractory sleeve 20 is separated from the melting furnace 10, it is possible to prevent a problem in which objects falling from the melting furnace 10 flow into the working frame 118 through the opening 123. When the support frame 163 moves to the second position, the support frame 163 may move while pushing the cover assembly 176 . At this time, the plurality of sliding covers 177 may overlap.

The cover assembly 176 may cover the opening 123 of the work stage 122 by being deformed or moved according to the movement of the support frame 163, in addition to the configuration in which the plurality of sliding covers 177 overlap as shown. It can be changed to a variety of other configurations.

Referring to FIGS. 8A to 8E , the motion actuator 172 provides a moving force to the support frame 163 so that the support frame 163 moves to a first position or a second position. The motion actuator 172 includes a body 173 fixed to the working frame 118 and a motion rod 174 movably provided to the body 173 so as to be connected to the support frame 163. The motion actuator 172 can move the support frame 163 to the first position as the motion rod 174 is withdrawn from the body 173, and the motion rod 174 is drawn into the body 173 to move the support frame ( 163) can be moved to the second position. The motion actuator 172 may be controlled by a controller 185 (Overhead Crane Remote Controller) operated by an operator W on board the apparatus 100 for replacing a fireproof sleeve for a melting furnace. As another example, the motion actuator 172 may be controlled by a manager located at a remote location. As the motion actuator 172 , a hydraulic cylinder or various types of actuators capable of providing linear movement force to the support frame 163 may be used.

As shown in FIGS. 8A and 8B, when the support frame 163 is positioned in the first position, the puller coupling block 143 of the puller assembly 140 is installed on the base frame 101. The actuator 178 can be connected with At this time, the puller coupling block 143 may be raised or lowered by the working actuator 178 . And as shown in FIGS. 8D and 8E , when the support frame 163 is located in the second position, the pusher coupling block 158 of the pusher assembly 156 may be connected to the working actuator 178 . At this time, the pusher coupling block 158 may be raised or lowered by the working actuator 178 .

The working actuator 178 is installed on the base frame 101 to provide a moving force for elevating the puller assembly 140 and the pusher assembly 156 . The work actuator 178 includes a body 179 fixed to the base frame 101 and a work rod 180 movably provided to the body 179 so as to be connected to the puller assembly 140 or the pusher assembly 156. include The work actuator 178 can raise the puller assembly 140 or the pusher assembly 156 toward the melting furnace 10 by pulling the work rod 180 out of the body 179, and the work rod 180 moves the body 179 ), it is possible to lower the puller assembly 140 or the pusher assembly 156 toward the working stage 122 by being drawn into. A coupling head 181 is provided at the upper end of the work rod 180 . The coupling head 181 is configured to be inserted into the puller coupling groove 144 of the puller coupling block 143 or the pusher coupling groove 159 of the pusher coupling block 158 . The operation actuator 178 may be controlled by a controller 185 (Overhead Crane Remote Controller) operated by an operator W on board the apparatus 100 for replacing a fireproof sleeve for a melting furnace. As another example, the operation actuator 178 may be controlled by an administrator located at a remote location.

As shown in FIG. 8A , when the support frame 163 reaches the first position, the puller coupling block 143 is placed in the position of the coupling head 181 . At this time, the coupling head 181 is inserted into the puller coupling groove 144 and the puller assembly 140 is connected to the working actuator 178 . When the puller assembly 140 is connected to the work actuator 178 and the work actuator 178 operates, the puller assembly 140 may move up and down. 8B shows a state in which the puller assembly 140 is raised.

As shown in FIG. 8C , while the support frame 163 leaves the first position and moves to the second position, the coupling head 181 moves out of the puller coupling groove 144 . At this time, both the puller assembly 140 and the pusher assembly 156 are disconnected from the working actuator 178 .

As shown in FIG. 8D , when the support frame 163 reaches the second position, the pusher coupling block 158 is placed in the position of the coupling head 181 . At this time, the coupling head 181 is inserted into the pusher coupling groove 159 and the pusher assembly 156 is connected to the working actuator 178 . When the pusher assembly 156 is connected to the work actuator 178 and the work actuator 178 operates, the pusher assembly 156 may move up and down. 8E shows a state in which the pusher assembly 156 rises.

As described above, in the apparatus 100 for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention, both the puller assembly 140 and the pusher assembly 156 can be operated using a single actuator 178 . That is, both the operation of separating the fire resistant sleeve 20 and the operation of installing a new fire resistant sleeve 30 can be performed with one operation actuator 178 . Therefore, it is possible to reduce the number of component parts, reduce manufacturing cost, simplify control by simplifying the configuration, and reduce work time.

As the working actuator 178, a hydraulic cylinder or various types of actuators capable of providing linear movement force to the puller assembly 140 or the pusher assembly 156 may be used.

In addition, the work actuator 178 is partially inserted into the groove provided in the puller assembly 140 or the groove provided in the pusher assembly 156, the puller assembly 140 or the pusher assembly 156 in various other ways. It can be configured to be connected with.

Hereinafter, a process of replacing a refractory sleeve by the apparatus 100 for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention will be described.

In the apparatus 100 for replacing a refractory sleeve for a melting furnace according to an embodiment of the present invention, the base frame 101, the transport vehicle 110, the lower ladder 115 and the intermediate ladder 116 are located outside the working position. After being assembled in the melting furnace 10, it can be transported to the working position below. As shown in Figures 1 and 2, the replacement device 100 of the refractory sleeve for the melting furnace can be fixed immovably after being moved to the working position. The new refractory sleeve 30 to be newly installed in the melting furnace 10 may be mounted on the pusher assembly 156 at a place other than the working position or at the working position.

After the replacement device 100 for the refractory sleeve for the melting furnace is placed in the working position, an operation of separating the refractory sleeve 20 from the melting furnace 10 is first performed. As shown in FIG. 9A , the separation of the fire resistant sleeve 20 is performed while the support frame 163 is located in the first position. When the support frame 163 is located in the first position, the puller assembly 140 is connected to the working actuator 178 . Before removing the fireproof sleeve 20 by moving the puller assembly 140, the operator W may place the dustproof membrane member 154 on the work stage 122 in a folded state and wrap it around the puller base 141. Continuing, the worker W may cover more parts of the puller assembly 140 with the dustproof membrane member 154 by unfolding the dustproof membrane member 154 .

Then, as shown in FIG. 9B , the working actuator 178 operates to raise the puller assembly 140 toward the tap port 11 . When the puller assembly 140 rises and the puller body 146 enters the fireproof sleeve hole 21 of the fireproof sleeve 20, the plurality of hooks 148 are folded into the first posture, thereby causing the puller body 146 to can smoothly pass through the refractory sleeve hole 21. After completely passing through the fireproof sleeve hole 21, the hook 148 is unfolded into the second posture by the elastic force of the elastic member 150.

Thereafter, when the work actuator 178 operates to lower the puller assembly 140, the plurality of hooks 148 come into contact with the upper end of the refractory sleeve 20 to move the refractory sleeve 20 to the outlet 11 of the melting furnace 10. can be pulled from In the process of separating the fireproof sleeve 20 from the tap hole 11 using the puller assembly 140, the operator W, if necessary, prevents the dustproof film member 154 from completely covering the tap hole 11. The height of 154 is adjusted, and a situation in which the refractory sleeve 20 is separated from the melting furnace 10 can be confirmed. After the fireproof sleeve 20 is separated from the tap 11 and placed on the puller base 141, the worker W spreads the dustproof membrane member 154 and contacts the upper end of the dustproof membrane member 154 to the melting furnace 10 to tap the steel A portion of the puller assembly 140 exposed around the sphere 11 and on the work stage 122 may be covered with a dustproof film member 154. Therefore, when the refractory sleeve 20 is separated from the melting furnace 10, falling objects falling from the melting furnace 10 can be collected inside the dustproof membrane member 154 without being scattered by being blocked by the dustproof membrane member 154.

As shown in FIG. 9C , the refractory sleeve 20 separated from the melting furnace 10 can be supported on the puller base 141 of the puller assembly 140 and descended toward the work stage 122 .

After the separation of the fireproof sleeve 20 is completed, the worker W may remove the dustproof membrane member 154 and arrange the falling objects to complete the separation of the fireproof sleeve 20 .

Thereafter, in order to install the new fireproof sleeve 30 to the tap hole 11, the motion actuator 172 operates to move the support frame 163 to the second position as shown in FIG. 9D. As the support frame 163 moves to the second position, the work actuator 178 is disconnected from the puller assembly 140 and connected to the pusher assembly 156.

Then, as shown in FIG. 9E , the operation actuator 178 operates to raise the pusher assembly 156 toward the tap port 11 . As the pusher assembly 156 ascends, a new fireproof sleeve 30 placed on the pusher base 157 may be inserted into the tap hole 11 . After the new refractory sleeve 30 is inserted into the tap hole 11, a worker may fix the new refractory sleeve 30 to the melting furnace 10 with a fixing pin or a locking device. Since the new fireproof sleeve 30 is supported by the pusher base 157 while being inserted into the tap hole 11, the operator can adjust the position or posture of the new fireproof sleeve 30 on the pusher base 157 as needed. Adjustments can be made to secure the new refractory sleeve 30 in place.

After the new refractory sleeve 30 is installed in the furnace 10, the operation actuator 178 may be actuated to return the pusher assembly 156, as shown in FIG. 9F.

Thereafter, in the replacement device 100 for the fireproof sleeve for the melting furnace, the base frame 101, the transport vehicle 110, the lower ladder 115, and the intermediate ladder 116 may be separated and stored.

As described above, according to the present invention, the puller assembly 140 for separating the refractory sleeve 20 from the melting furnace 10 and the new refractory sleeve 30 are installed in the working space where the operator W is located. Since all of the pusher assemblies 156 for installation are installed, the replacement of the refractory sleeve can be performed quickly and efficiently, and the downtime of the melting furnace 10 can be minimized.

In addition, according to the present invention, the work intensity of the worker W can be greatly reduced, and the risk of safety accidents can be reduced by providing a safe working environment.

In addition, according to the present invention, the operation efficiency of the melting furnace is seriously reduced due to the frequent replacement of the refractory sleeve due to the relatively short service life of the refractory sleeve, and the situation in which the working time is excessively long is improved. can be drastically reduced.

Although the preferred examples of the present invention have been described above, the scope of the present invention is not limited to the forms described and illustrated above.

For example, although the drawing shows that the replacement device 100 for a refractory sleeve for a melting furnace according to the present invention is used to replace a refractory sleeve provided in an electric furnace type melting furnace 10, for a melting furnace according to the present invention The refractory sleeve replacement device 100 may be used to replace refractory sleeves provided in various types of melting furnaces other than electric furnaces.

In addition, the drawing shows that the replacement device 100 for a refractory sleeve for a melting furnace according to the present invention includes a transport vehicle 110 so that the base frame 101 is detachably mounted on the transport vehicle 110. The frame 101 may be fixedly installed on the transport vehicle 110 . As another embodiment, the transport vehicle 110 may be omitted.

In addition, the apparatus 100 for replacing a refractory sleeve for a melting furnace according to the present invention may have a structure in which the working frame 118 is installed below the melting furnace 10 so as to be able to move up and down without the base frame 101 .

In addition, although it is shown that the puller assembly 140 and the pusher assembly 156 are moved by one working actuator 178 in the drawing, the puller assembly 140 and the pusher assembly 156 are each operated by separate working actuators. It can be configured to elevate.

In addition, in the drawings, the support frame 163 supporting the puller assembly 140 and the pusher assembly 156 is linearly moved in a direction crossing the lifting direction of the puller assembly 140 and the pusher assembly 156, so that the puller assembly is linearly moved. Although the positions of 140 and pusher assembly 156 are shown to be changed, puller assembly 140 and pusher assembly 156 may be configured to move independently.

In addition, the support frame 163 supporting the puller assembly 140 and the pusher assembly 156 may be installed on the working frame 118 to exhibit other types of movement other than linear movement. For example, the support frame 163 may be installed to rotate. In this case, positions of the puller assembly 140 and the pusher assembly 156 may be changed according to the rotation angle of the support frame 163 .

In addition, the puller assembly 140, the pusher assembly 156, and the support frame 163 may be configured to exhibit various types of movements in a manual or automatic manner.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and may be variously modified without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: melting furnace 20, 30: fireproof sleeve
100: Replacement device for refractory sleeve for melting furnace
101: base frame 106: lifting guide
109: base stage 110: transport vehicle
115: lower ladder 116: middle ladder
118: work frame 122: work stage
128: inclined guide 130: lifting actuator
134: sliding ladder 140: puller assembly
141: puller base 143: puller coupling block
146: puller body 148: hook
150: elastic member 152: puller guide bar
154: dustproof membrane member 156: pusher assembly
157: pusher base 158: pusher coupling block
161: pusher guide bar 163: support frame
166: support frame guide block
168, 169: guide bushing
172: motion actuator 176: cover assembly
178: work actuator 181: coupling head

Claims (18)

As a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tapping port of a melting furnace,
a work frame disposed below the melting furnace;
a puller assembly movably supported on the working frame to separate the fireproof sleeve from the melting by pulling it towards the working frame; and
A pusher assembly movably supported on the working frame so as to lift a new fireproof sleeve toward the exit,
The puller assembly and the pusher assembly are respectively supported on the working frame so that the puller assembly faces the tap hole or the pusher assembly faces the tap hole,
Including; a support frame movably supported on the working frame;
The puller assembly and the pusher assembly are movably coupled to the support frame,
A replacement device for a refractory sleeve for a melting furnace comprising: at least one working actuator for providing a moving force for elevating the puller assembly and the pusher assembly.
delete delete delete According to claim 1,
The working actuator may be selectively connectable to the puller assembly or the pusher assembly, and may be connected to the puller assembly to provide a moving force to the puller assembly when the puller assembly faces the outlet, and the pusher assembly A replacement device for a refractory sleeve for a melting furnace that is connected to the pusher assembly when facing the tap hole to provide a moving force to the pusher assembly.
According to claim 5,
The work actuator includes a coupling head detachably connected to the puller assembly or the pusher assembly,
The puller assembly includes a puller coupling block detachably connected to the coupling head,
The pusher assembly is a replacement device for a refractory sleeve for a melting furnace including a pusher coupling block detachably connected to the coupling head.
According to claim 6,
The puller coupling block includes a puller coupling groove into which the coupling head is inserted,
The pusher coupling block is a replacement device for a refractory sleeve for a melting furnace including a pusher coupling groove into which the coupling head is inserted.
According to claim 1,
The puller assembly,
a puller base capable of supporting the lower end of the fireproof sleeve; and
A puller guide bar coupled to the puller base so as to be linearly movably supported on the support frame; includes,
The pusher assembly,
a pusher base capable of supporting the lower end of the new fireproof sleeve; and
A replacement device for a refractory sleeve for a melting furnace comprising: a pusher guide bar coupled to the pusher base so as to be linearly movably supported on the support frame.
According to claim 1,
A replacement device for a refractory sleeve for a melting furnace comprising: a motion actuator connected to the support frame to move the support frame.
As a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tapping port of a melting furnace,
a work frame disposed below the melting furnace;
a puller assembly movably supported on the working frame to separate the fireproof sleeve from the melting by pulling it towards the working frame; and
A working actuator for providing a moving force for elevating the puller assembly; includes,
The puller assembly,
a puller base capable of supporting the lower end of the fireproof sleeve;
a puller body supported on the puller base so as to pass through the fireproof sleeve hole of the fireproof sleeve; and
A hook provided on the puller body so as to come into contact with an upper end of the fireproof sleeve and pull the fireproof sleeve toward the working frame;
The hook is configured to be able to change its posture into a first posture that can pass through the fire resistant sleeve hole and a second posture that can come into contact with the upper end of the fire resistant sleeve,
The puller assembly includes an elastic member for applying an elastic force to the hook so that the hook is changed to the second position.
delete delete delete According to claim 10,
A fireproof sleeve replacement device for a melting furnace comprising: a dustproof membrane member disposed between the working frame and the melting furnace to surround the puller base.
As a replacement device for a refractory sleeve for a melting furnace for replacing a refractory sleeve disposed at a tapping port of a melting furnace,
base frame;
a work frame movably supported on the base frame so as to advance toward or retreat from the fire resistant sleeve;
a lifting actuator supported by the base frame to provide a moving force to the working frame;
a puller assembly movably supported on the working frame to separate the fireproof sleeve from the melting by pulling it toward the working frame; and
A pusher assembly movably supported on the working frame so as to lift a new fireproof sleeve toward the exit,
Including; a sliding ladder connecting a base stage provided on the base frame and a work stage provided on the work frame higher than the base stage,
The sliding ladder is slidably coupled to the working frame so that the position of the lower end supported on the base frame can be changed according to the movement of the working stage.
delete According to claim 15,
The sliding ladder,
A ladder body including a plurality of supports on which a worker can step; and
Including; a caster provided at the lower end of the ladder body so as to come into contact with the base stage,
The working frame is a replacement device for a refractory sleeve for a melting furnace including an inclined guide disposed inclined downward toward the base stage so as to slidably support the ladder body.
According to claim 15,
A transport vehicle supporting the base frame; includes,
The transport vehicle,
a vehicle body to which the base frame is detachably coupled; and
A device for replacing a fireproof sleeve for a melting furnace comprising: a plurality of wheels provided on a commercial vehicle body so as to roll in contact with a rail disposed below the melting furnace.

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