KR102573147B1 - Molten steel ladle hot repair apparatus - Google Patents

Abstract

The present invention relates to a hot repair device for a molten steel ladle, wherein a working container filled with a refrigerant (cooling water) is provided to be inserted into the ladle, so that it can safely work in a much lower temperature (about 60 ° C) environment than before, and the ladle bottom (lower part ) can also be approached closely, so it has the effect of completely removing slag.

Description

Molten steel ladle hot repair device {MOLTEN STEEL LADLE HOT REPAIR APPARATUS}

The present invention relates to a device for removing metal or slag remaining inside a molten steel ladle, and more particularly, to a hot repair device that can enter the inside of a ladle and perform a removal operation.

In the steelmaking process, molten steel from the converter is received as a ladle, moved to the next process through a crane, etc., and after steel is tapped, metal or slag remains inside the ladle.

In order to remove the metal or slag remaining inside the ladle, a ladle furnace metal removal device was developed in Registered Utility Model No. 20-0238019, but in order to completely remove the metal inside the ladle, a device disclosed in Registered Utility Model No. 0117435 In the past, workers have been removing it by directly spraying high-pressure oxygen.

By the way, the molten steel rae has been removed and the temperature is close to 1000℃ during the removal operation, so the operator has no choice but to spray high-pressure oxygen through a nozzle such as a steel pipe while away from the ladle entrance at a certain distance. Not only is it difficult to remove, but even if the existing heat sink is installed and worked, a great problem has occurred in the safety of the operator due to the scattered heat.

Therefore, in order to solve the above conventional problems, the present invention is to provide a molten steel ladle hot repair device capable of entering the inside of the ladle and removing the metal.

In order to achieve the above object, a hot repair device for molten steel ladle according to the present invention includes a cart provided to be movable with front and rear wheels on a predetermined rail; A work cylinder protruding forward with an entrance on the front wheel of the bogie and being inserted into the ladle; And it is characterized in that it is configured to include a counterweight provided on the rear wheel of the bogie at least heavier than the weight of the working cylinder.

The working cylinder has a double container structure in which an inner case and an outer case are spaced apart at regular intervals and filled with a predetermined refrigerant, and one or more working through holes may be formed on the bottom facing the inlet.

The working cylinder is a cylindrical capsule, which goes from the inlet to the bottom and is composed of at least a first side capsule, a second side capsule and a bottom capsule, the first side capsule, the second side capsule and the bottom capsule each having a supply port and An outlet may be provided so that the refrigerant is independently supplied and discharged.

On one side of the bogie, a refrigerant circulation hose and a gas supply hose may be seated and automatically transported according to the movement of the work cylinder by a cut endless track chain.

The refrigerant is cooling water, and the refrigerant circulation hose is composed of a cooling water supply hose and a cooling water discharge hose, and the cooling water supply hose and the cooling water discharge hose are inserted into the severed endless track chain, and each end supplies the cooling water provided in the bogie. It is connected to the distribution pipe and the coolant discharge collection pipe, and each other end may be connected to the coolant control pipe provided on one side of the rail.

In the present invention, since a work container filled with a refrigerant (cooling water) is provided to be inserted into the ladle, the work can be performed safely in a much lower temperature (about 60 ° C) environment than before, and the bottom (lower part) of the ladle can be approached closely, so that the back is now It has the effect of completely removing it.

1 is a side view showing the overall configuration of a hot repair device for molten steel ladle according to an embodiment of the present invention.
Figure 2 is a side view showing that the working cylinder can be inserted into the ladle by moving the cart in FIG.
FIG. 3 is a plan view viewed from above in the state of FIG. 2 .
FIG. 4 is a conceptual diagram showing the rear configuration of FIG. 3 .
Figure 5 is a conceptual view showing a state cut along the line AA of Figure 3 and viewed in the direction of the arrow.
6 is a photograph showing the state of working inside the working cylinder of the molten steel ladle hot repair device according to a specific embodiment of the present invention.
7 to 9 are photographs showing the appearance of the cut caterpillar chain and cooling water control pipe of the molten steel ladle hot repair device according to a specific embodiment of the present invention.

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

1 to 5, the molten steel ladle hot repair device 100 according to an embodiment of the present invention is a bogie provided to be movable with front and rear wheels 212 and 214 on a predetermined rail 110 (200); A working cylinder 300 having an entrance on the front wheel 212 of the bogie and protruding forward to be inserted into the inside 12 of the tilted ladle 10; and a counterweight 250 heavier than the weight of the working cylinder 300 on the rear wheels 214 of the bogie.

Here, as shown in FIG. 4, the rail 110 is to be fastened to a fixture 104 dug to a predetermined depth on the floor surface 102 of the workshop toward the entrance of the tilted ladle 10 in the removal workshop. can Both ends of the rail 110 may be provided with front and rear stoppers 112 and 114 for safety reasons.

The bogie 200 can be in any form as long as it is provided to be movable by the front and rear wheels 212 and 214 toward the inclined ladle 10 on the rail 110, but as shown in FIG. 4, at least the left and right sides It is preferable to provide an axle 213 connected to the rear wheel 214 to be driven by a predetermined electric motor 211.

In addition, referring to FIGS. 1 and 7 together, the body frame of the bogie 200 is 'I'-beam or 'H'-beam, and the vertical frame 220 for fastening the bottom frame 210 and the working cylinder 300 And it may be composed of a support frame (230). On the bottom frame 210, a predetermined moving end is formed according to the height of the working cylinder 300, and the bogie 200, which is the other side of the cut endless chain 130 to be described later, in order for the worker 1 to climb the moving end ) The stairs 216 may be provided on the other side.

A protective railing 240 may be provided around the moving end of the bogie 200, and a counterweight 250 may be stacked on the floor frame 210 behind the rear railing 242. The balance weight 250 is divided into left and right balance weights 252 and 254 and stacked on the left and right rear wheels 214 in FIG. 4, but may be stacked without being divided.

In addition, the balance weight 250 is such that the bogie 200 does not tilt forward and the rear wheels 214 are always in contact with the rail 110 even when the work cylinder 300 protrudes forward with the entrance on the front wheel 212. In order to properly demonstrate the driving force of the electric motor 211 in the state, it is provided at least heavier than the weight of the working cylinder 300 (considering the weight added to the working cylinder during work), as shown in FIG. 1, the rear wheel 214 It is preferable to install directly above or behind it.

The working cylinder 300 can be in any form as long as it can withstand high heat close to 1000 ° C and lower thermal conductivity, but the inner case and the outer case made of iron are separated at regular intervals and filled with a predetermined refrigerant between them. It is preferable to have a double container structure. Here, the refrigerant may be any material including air as long as it is a material for providing a temperature difference between the inner and outer cases, but it is preferable to use water, that is, cooling water. Here, the cooling water may be at a temperature normally supplied as industrial water, but may be supplied at a temperature lower than that, if necessary. In addition, a plurality of guide members may be provided outside the inner case of the working cylinder 300 to guide the flow of the refrigerant without contacting the outer case.

As shown in FIG. 1, the inlet of the working cylinder 300 is fastened to the vertical frame 220 with predetermined fasteners 311 and 313, and on the floor facing the inlet, as shown in FIG. 5, one or more workpieces Through holes 335 and 336 may be formed. 1 to 5, the working cylinder 300 is shown as a cylindrical capsule, going from the entrance to the bottom and composed of at least a first side capsule 310, a second side capsule 320 and a bottom capsule 330, but a square It may be implemented in the shape of a polygonal cylinder such as a cylinder, and even if it is a cylindrical capsule, it may be implemented by dividing it into one or three or more side capsules. In addition, although FIG. 5 shows an example in which two working through-holes 335 and 336 are formed on the bottom, one or more may be formed on the side as well as the bottom. As shown in Figure 5, when forming two or more working through-holes (335, 336) on the floor, it is preferable to make the heights of the through-holes different from each other so that the ladle 10 does not fall out when working on the floor.

The working cylinder 300 is composed of a first side capsule 310, a second side capsule 320, and a bottom capsule 330 in three stages, for example, as shown in FIG. In this case, it is preferable to supply and discharge the refrigerant independently by placing a supply port and a discharge port in each stage of the capsule. The supply port and outlet of each stage capsule can be installed arbitrarily, but it is preferable for the heat collection and circulation of the refrigerant to arrange the supply port at the upper end of the inlet side and the discharge port at the lower end of the bottom side in each capsule. In addition, since the capacitance (refrigerant volume) of the capsule gradually decreases from the inlet to the bottom, the refrigerant is circulated more quickly in the area receiving a lot of heat from the ladle 10, so it is preferable.

Referring to FIG. 1 , as a specific example of the working cylinder 300, an example in which a first side capsule 310 is connected to a bottom capsule 330 with a second side capsule 320 therebetween is shown. That is, the first side capsule 310 is fastened to the vertical frame 220 with the inlet side fasteners 311 and 313, and the 1-2 inner case connector ( 321) is concluded. On the other hand, the bottom capsule 330 is fastened to the bottom side of the second side capsule 320 through the second-third inner case connector 331. The supply port 312 of the first side capsule 310 is at the top of the inlet side, the outlet 314 is at the bottom side, and the supply port 322 of the second side capsule 320 is the outlet port 324 at the top of the inlet side. are arranged at the lower end of the bottom side, and the bottom capsule 330 is provided in a substantially disc shape, showing that the supply port 332 is disposed at the top and the discharge port 334 is disposed at the bottom. 1 and 2, reference numerals 316 and 326 denote inner case support rings of the first side capsule 310 and the second side capsule 320, respectively.

According to the embodiment, as shown in FIGS. 1 to 3 and 7, a refrigerant circulation hose ( 141, 142) and the gas supply hose 150 may be seated and automatically transported.

Here, in the cut caterpillar chain 130, as shown in FIG. 7, a plurality of link plates 131 are connected in the form of a normal chain front and back on both sides, and links on both sides form a part with a small radius of curvature of the chain. An inner bar 135 is inserted between one side of the plate 132 for each link plate, and between the other side 133 of the link plates on both sides forming a part with a large radius of curvature of the chain, one or two link plates are crossed forward or backward. It means that the outer bar 136 is inserted into the jump, and the whole is cut or partially in the shape of an endless track chain.

The refrigerant circulation hoses 141 and 142 and the gas supply hose 150 are inserted or supported between the outer bar 136 and the inner bar 135 of the cut endless track chain 130 so that the bogie 200 is When moving backward, the caterpillar chain 130 cut according to the movement of the working cylinder 300 is automatically transported while being unfolded or wound.

Depending on the embodiment, as shown in FIGS. 7 to 9 , when the refrigerant is cooling water, the refrigerant circulation hose may include a cooling water supply hose 141 and a cooling water discharge hose 142 . In this case, the cooling water supply hose 141 and the cooling water discharge hose 142 are inserted into the cut caterpillar chain 130, that is, the outer bar 136 and the inner bar 135 of the cut caterpillar chain 130. ), each end is connected to the coolant supply distribution pipe 127 and the coolant discharge collection pipe 128 provided in the bogie 200 through the connecting flanges 127a and 128a, and each other end is Similarly, the cooling water supply control pipe 161 and the cooling water discharge control pipe 162 of the cooling water control pipe 160 provided on one side of the rail 110 may be connected.

As shown in FIG. 3, the cooling water supply distribution pipe 127 and the cooling water discharge collection pipe 128 are provided on one side of the truck to move together with the truck 200, and a plurality of intermediate pipes 120 disposed below the moving stage. , the supply pipe 121 and the discharge pipe 122 of the first side capsule 310, the supply pipe 123 of the second side capsule 320, and The discharge pipe 124 is connected to the supply pipe 125 of the bottom capsule 330 and the discharge pipe 126.

In addition, the supply pipe 121 and the discharge pipe 122 of the first side capsule 310 are connected to the supply port 312 and the discharge port 314 of the first side capsule, respectively, and the supply pipe of the second side capsule 320 ( 123) and the discharge pipe 124 are respectively connected to the supply port 322 and the discharge port 324 of the second side capsule, and the supply pipe 125 and the discharge pipe 126 of the bottom capsule 330 are respectively connected to the aforementioned bottom capsule. It is connected to the supply port 332 and the outlet port 334 through a connecting flange or the like.

In the cooling water control pipe 160, as shown in FIG. 9, the cooling water supply control pipe 161 and the cooling water discharge control pipe 162 are divided into two or more branch pipes 161a, 161b; 162a, 162b, respectively, and then again. , each connected to a cooling water supply pipe 163 and a cooling water discharge pipe 164, so that cooling water can be supplied from outside the workplace or discharged outside the workplace. Here, according to the embodiment, the number of branch pipes of the cooling water discharge control pipe 162 is greater than the number of branch pipes of the cooling water supply control pipe 161, so that in addition to the normal cooling water supply and / or discharge control, the cooling water discharge control pipe Cooling water moved through a plurality of branch pipes connected to and cooled by an air-cooling method is supplied to the cooling water supply pipe 163 or the cooling water supply control pipe 161 again, so that the discharged cooling water is recycled and the internal temperature of the working cylinder 300 is reduced. It may be kept constant at a workable temperature (around 60 ° C).

As shown in FIG. 9, in one of the branch tubes connected to the cooling water supply control pipe 161 and the cooling water discharge control pipe 162, pressure gauges 165 and 166, a handle type open/close switch 167, a bar type open/close switch 168, 169) and the like may be provided.

According to each embodiment described above, as shown in FIGS. 2 and 3, the work cylinder 300 filled with the refrigerant (cooling water) is provided to be inserted into the ladle interior 12, so that the operator 1 In the safe working cylinder 300, the injection port 2 to which the gas hose 3 is connected is inserted into the through-hole 335 and sprayed with high-pressure oxygen. While working, the bottom of the ladle (lower part) can also be approached closely, so there is an effect of completely removing the now (14) and the like.

100: molten steel ladle hot repair device 110: rail
129, 260: control box 130: severed crawler chain
200: bogie 210: floor frame
211: electric motor 212: front wheel
213: axle (drive shaft) 214: rear wheel
220: vertical frame 230: support frame
240: guardrail 250: counterweight
300: working cylinder 310: first side capsule
320: second side capsule 330: bottom capsule

Claims (5)

delete delete A bogie provided to be movable with front and rear wheels on a predetermined rail;
A work cylinder protruding forward with an entrance on the front wheel of the bogie and being inserted into the ladle; and
It is configured to include a counterweight provided at least heavier than the weight of the work cylinder on the rear wheel of the bogie,
The working cylinder has a double container structure in which an inner case and an outer case are spaced apart at regular intervals and filled with a predetermined refrigerant, and one or more working through-holes are formed on the bottom facing the inlet,
the working cylinder is a cylindrical capsule, which goes from the mouth to the bottom and is composed of at least a first side capsule, a second side capsule and a bottom capsule;
The first side capsule, the second side capsule and the bottom capsule each have a supply port and a discharge port so that the refrigerant is supplied and discharged independently.
According to claim 3,
A molten steel ladle hot repair device, characterized in that a cut endless track chain is provided on one side of the bogie so that the refrigerant circulation hose and the gas supply hose are seated and automatically transported in accordance with the movement of the work cylinder.
A bogie provided to be movable with front and rear wheels on a predetermined rail;
A work cylinder protruding forward with an entrance on the front wheel of the bogie and being inserted into the ladle; and
It is configured to include a counterweight provided at least heavier than the weight of the work cylinder on the rear wheel of the bogie,
The working cylinder has a double container structure in which an inner case and an outer case are spaced apart at regular intervals and filled with a predetermined refrigerant, and one or more working through-holes are formed on the bottom facing the inlet,
A cut endless track chain is provided on one side of the bogie so that a refrigerant circulation hose and a gas supply hose are seated and automatically transported in accordance with the movement of the working cylinder,
The refrigerant is cooling water,
The refrigerant circulation hose is composed of a cooling water supply hose and a cooling water discharge hose,
The cooling water supply hose and the cooling water discharge hose are inserted into the cut endless track chain, and each end is connected to the cooling water supply distribution pipe and the cooling water discharge collection pipe provided in the bogie, and each other end is provided on one side of the rail Hot repair device for molten steel ladle, characterized in that it is connected to the cooling water control pipe.