KR20020044435A - The device of eliminating sticked matter and pouring oil in mold tube - Google Patents

Abstract

PURPOSE: A device for removing stuck matter and pouring oil into a mold tube is provided to flow highly clean molten steel into a mold by simply coating a certain amount of oil on the surface of the mold tube after easily removing the stuck matter of the mold tube generated during continuous casting process. CONSTITUTION: The device for removing stuck matter and pouring oil into a mold tube comprises a cylinder(210) which is vertically operated by hydraulic pressure, at the lower part of which a piston(220) to which a conical grinding wheel expansion bar(222) is attached is installed, and along the body of which an oil injection line is formed; a grinding wheel support shaft(231) the upper end of which is inserted into the lower part of the cylinder(210), into which the grinding wheel expansion bar(222) is inserted, and which is equipped with an internal space where a return spring is installed between the grinding wheel expansion bar(222) and the grinding wheel support shaft(231); a pair of grinding wheel support plates one ends of which are engaged with the grinding wheel expansion bar(222) so that the grinding wheel support plates are installed in the grinding wheel support shaft(231), to the other ends of which grinding wheels are adhered, and in which at least one or more oil injection nozzles(229) are formed on an oil line and an end of the oil line so that the grinding wheel support plates are symmetrically arranged around the grinding wheel support shaft(231); a flexible hose connecting the oil injection line to the oil line; and an up and down adjusting part(300) adjusting the cylinder(210) up and down.

Description

Molding tube removal and oil filling device {THE DEVICE OF ELIMINATING STICKED MATTER AND POURING OIL IN MOLD TUBE}

The present invention relates to a device for injecting oil and removing the deposits attached to the corner corners of the molten steel during the continuous casting process of injecting molten steel in a molten state to form a slab of a certain shape.

1 is a view schematically showing a general continuous casting process.

In general, the continuous casting process flows the refined molten steel into the tundish (130) through the long nozzle (Long Nozzle: 180) in the ladle 150, and temporarily stay in the tundish, then the tundish ( By a sliding cassette attached to each strand of 130, an appropriate amount is controlled and flows into the mold 100 through the immersion nozzle 140. The molten steel introduced into the mold 100 is indirectly cooled by the coolant flowing around the mold tube 110 to form a slab having a slab shape. The shaped slab is then cooled in earnest by spraying of coolant mixed with air, cut to a specified length, completely cooled, and then sent to a later process.

However, when molten steel is injected into the mould 100 from the lower nozzle 140 of the tundish 130, the molten steel is injected into open casting, and thus the molten steel injection stream is injected into contact with oxygen in the air, The amount of oxygen is increased, and pinholes and blue holes are generated to deteriorate the quality of the cast steel 170. Conventionally, in order to prevent this, the amount of oxygen has been reduced by injecting aluminum wire (Al Wire) into the molten steel injection stream. However, in this process, a small amount of splash, dust, and foreign substances, splashed by molten steel injection stream, is pushed sideways by the molten steel vortex, and the corner portion of the mold tube 110 is moved. It will stick to the gap.

High pressure water is used to clean the mould tube 110 in this state, but corners and angled portions of the corner part of the mould tube 110 have a very difficult problem.

In particular, when cleaning using high-pressure water and air, the coating of the molybdenum tube 110 (Coating) is peeled off, which damages the tube, which causes the thermal conductivity of the surface of the cast steel 170 during casting. (Contacts with Mould-Cooled Water) are different from each other, which adversely affects the quality of cast cracks. In addition, when cleaning the mold tube with water, water is soaked in the gap (Slit Gap) of the mold tube 110 and the remaining water remains in the tube copper plate 120, the high temperature of the molten steel during the casting operation Contact may lead to an explosion, which may cause serious problems in a safety accident. In addition, frequent moisture contact shortens the life of the molybdenum tube 110 and leads to hole defects, cracking defects, and surface defects on the surface of the cast iron 170, resulting in increased scrap of the cast steel, unstable operation, and safety accidents. It can also be a cause.

In addition, the lab seed oil (Rape Seed Oil) is supplied to the surface of the mold tube 110 as a lubricant for the mold 100, and it is very difficult to apply a certain amount of oil to the inner surface of the mold tube 110 in a short process time. to be.

The present invention is to solve the problems as described above, by easily removing the fixed material of the molten tube generated during the continuous casting process, by applying a certain amount of oil to the surface of the molybdenum tube, the high-clean molten steel By inflow, it induces uniform formation of cast solidification shell in the initial casting, prevents break out of solidification shell, prevents hole defects and cracking defects on the surface of cast steel, and hot molten steel Its main purpose is to provide a mould tube deposit removal and oil filling device that can prevent explosion due to contact.

1 is a schematic view showing a general continuous casting process.

Figure 2 is a perspective view of the fixture removal and oil injection device of the present invention.

Figure 3 is a cross-sectional view of the fixture removal and oil injection device of the present invention.

4 is a partial cross-sectional view of the guide portion of the present invention.

5 is a partial cross-sectional view of the abrasive stone support plate of the present invention.

※ Explanation of symbols used in main part of drawing ※

100: Mould 110: Mould tube

111: left width adjustment plate 112: right width adjustment plate

113: cumulative fixing 120: tube copper plate

130: Tundish 140: Immersion nozzle

150: ladle 160: pinch roll

170: cast steel 180: long nozzle

200: fixing matter removal device 210: cylinder

211: spindle 212: guide part

220: piston 221: expansion adjustment shaft

222: abrasive stone expansion bar 223: piston operation hose

224: oil injection hose 225: upper spring

226: oil injection line 227: flexible hose

228: oil line 229: oil nozzle

230: abrasive stone support plate 231: abrasive stone support shaft

232: tension spring 233: return spring

234: latch 240: abrasive stone

250: cam 251: cam motor

300: up and down adjustment unit 310: up and down adjustment shaft

320: upper limit switch 330: lower limit switch

340: limit bar

In order to achieve the above object, the present invention is a cylinder 220 which is capable of operating up and down by hydraulic pressure and has a conical abrasive stone expansion bar 222 attached thereto, and an oil injection line 226 is formed along the body ( 210 and an inner space in which the upper end is inserted in the lower part of the cylinder 210, and the abrasive stone expansion bar 222 of the piston is interpolated, and the return spring 233 is installed between the abrasive stone expansion bar 222. Abrasive stone support shaft 231, and one end is formed to engage the abrasive stone expansion bar 222, is installed in the abrasive stone support shaft, the other end is attached to the abrasive stone, the oil line 228 and at least one oil jet (229) therein ) Is formed and a pair of abrasive stone support plate 230, the oil injection line 226 and the oil line 228 to be disposed in a symmetrical structure around the abrasive stone support shaft, the flexible hose 227 and the cylinder 210 ) Can be adjusted up and down The upper and lower adjustment unit 300 provides a molybdenum tube fixed substance removal and oil injection device, characterized in that configured.

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

Figure 2 is a perspective view of the molten tube fixed substance removal and oil injection device of the present invention, Figure 3 is a cross-sectional view of the molten tube fixed substance removal and oil injection device of the present invention.

As can be seen in Figure 2 the present invention is largely a grinding wheel support plate 230 having a cylinder 210 with a built-in piston 220 and the abrasive stone 240 disposed left and right about the abrasive stone support shaft 231. It is configured, and the upper and lower adjustment unit 300 is attached to the cylinder side to adjust the position of the cylinder, it is composed of a cam 250 for flowing the abrasive stone support shaft.

Referring to Figure 3 will be described in detail the structure of the present invention.

The cylinder 210 has a cylindrical shape in which the piston 220 which performs the shangdong movement is formed in a cylindrical shape, and a piston operating hose 223 is connected to an outer side of the cylinder 210 so that the hydraulic pressure is applied to the inside of the cylinder 210. It serves to push the piston 220 downward. In addition, the oil injection hose 224 is also attached to be able to inject oil. The cylinder 210 is composed of a spindle 211 and a guide portion 212 at the bottom thereof, the oil injection line 226 is formed therein.

The upper spring 225 is located at the bottom of the piston 220, and serves to return the piston 220 from which the hydraulic pressure has been removed. The piston 220 is connected to the expansion adjustment shaft 221, the expansion adjustment shaft 221 is connected to the abrasive stone expansion bar 222 of the conical or clock-shaped. The piston 220 and the expansion adjustment shaft 221 may be integrally formed. Abrasive stone expansion bar 222 is a tapered conical structure is configured to expand and contract the abrasive stone support plate 230 engaged with it by the vertical operation.

The upper portion of the abrasive stone support shaft 231 is inserted into the guide portion 212 below the cylinder 210 so that the abrasive stone support shaft 231 can move up and down. A pair of abrasive stone support plates 230 are inserted to be symmetrical. The abrasive stone support shaft 231 is cylindrical, the upper portion is inserted into the guide portion 212 of the cylinder 210, the abrasive stone support plate 230 is inserted into the lower portion, the abrasive stone expansion bar 222 is inserted therein. A return spring 233 is installed in the space with the inserted abrasive stone expansion bar 222 to allow the abrasive stone support shaft 231 to flow by the cam 250.

The abrasive stone support plate 230 has a structure in which one end is inserted into the abrasive stone support shaft 231, and the other end is attached to the abrasive stone 240. The portion inserted into the abrasive stone support shaft 231 has an obliquely inclined shape. As the abrasive stone expansion bar 222 is engaged, the abrasive stone expansion bar 222 is formed to be pushed and moved from side to side as it moves up and down. The upper end of the inclined surface is provided with a latch 234 so as not to escape from the abrasive stone support shaft 231. The abrasive stone support plate 230 pushed out by the abrasive stone expansion bar 222 is returned by at least one tension spring 232 formed thereon.

Up and down adjustment unit 300 is installed on the side of the cylinder 210 to adjust the position of the cylinder, the upper and lower adjustment unit 300 is a limit bar 340 and the limit bar 340 formed on the cylinder 210 side It consists of a vertical adjustment shaft 310 is inserted. An upper limit switch 320 and a lower limit switch 330 are formed on the upper and lower adjustment shafts 310 so that the limit bar 340 is caught by the upper limit switch 320 and the height of the cylinder 210 can be adjusted.

4 is an enlarged partial cross-sectional view of the guide part 212.

A cam 250 is installed in the space between the abrasive stone support shaft 231 in the guide part 212 so that the abrasive stone support shaft 231 can flow up and down according to the driving of the cam 250. . The cam 250 is driven by the cam motor 251.

FIG. 5 is a cross-sectional view showing a lateral cutting surface of the abrasive stone support shaft 231 in which the abrasive stone support plate 230 is installed, showing the oil injection device of the present invention.

In other words, an oil line 228 is formed in the abrasive stone support plate 230, and the oil line 228 is an oil injection line 226 and a flexible hose 227 descending along the guide part 212. Connected. The oil line 228 is connected to an oil injection hole 229 formed in various places of the abrasive stone support plate 230 and has a structure capable of injecting oil.

Referring to the operation of the present invention made of such a configuration as follows.

When the continuous casting is completed, foreign substances such as dust are attached to the corner of the mold tube. In order to remove the molten tube deposit, the molten tube fixer removing device of the present invention is positioned on the upper part of the mold 100, and adjusted to the limit switches 330 and 340 installed on the vertical adjustment shaft 310 to the lower predetermined position. . When the movement to a predetermined depth is inserted into the molybdenum tube 110, the hydraulic pressure is supplied to the piston operating hose 223, the piston 220 transmits power to the expansion adjustment shaft (221). Accordingly, the abrasive stone expansion bar 222 is moved to the bottom, thereby the abrasive stone support plate 230 is expanded by the width of the tube 110. At this time, the cam motor 251 is operated so that the cam 250 is rotated, and the abrasive stone support shaft 231 is repeatedly moved up and down by the unbalanced structure of the cam 250. In addition, the grinding operation of the abrasive stone 240 is performed while the vertical movement is repeated by engaging with the return movement of the return spring 233. As the grinding progresses, the limit bar 340 is caught by the lower limit switch 330 to allow grinding to a predetermined depth.

When the fixed material is removed from both sides of the mold tube 110 by a constant reciprocating motion of the abrasive stone 240, the hydraulic pressure is discharged to the piston operating hose 223, the piston 220 by the operation of the upper spring 225. Is pushed up. Accordingly, the abrasive stone support plate 230 is shrunk and separated from the tube 110 surface. In addition, when the cam motor 251 stops the operation, the reciprocating motion of the abrasive stone support shaft 231 is stopped.

After the abrasive stone support plate 230 is reduced, oil is injected by the oil injection hose 224 and oil is supplied along the oil line 228 embedded in the abrasive stone support plate 230. Then, the oil is sprayed to the entire surface of the tube 110 by the vertical operation of the abrasive stone support plate 230.

According to the present invention as described above, it is possible to remove the deposits of the tube generated during the continuous casting process, reduce the amount of oxygen introduced into the cast slab due to the deposits to flow the high clean molten steel into the mould, the initial casting cast solidification It is possible to induce the uniformity of the shell, and to prevent the break-out of the solidified shell and to prevent the hole defects and the crack defects of the cast surface. In addition, by automatically applying a certain amount of oil on the surface of the molybdenum tube, molten steel can be smoothly introduced, and the risk of high temperature molten steel coming into contact with water remaining on the tube surface and causing explosion.

Claims (3)

A cylinder 210 capable of operating up and down by hydraulic pressure and having a piston 220 having a conical abrasive stone expansion bar 222 attached therein, and having an oil injection line 226 formed along the body; An upper end is inserted into the lower end of the cylinder 210, the abrasive stone expansion bar 222 is interpolated, and the abrasive stone support shaft having an inner space in which the return spring 233 is installed between the abrasive stone expansion bar 222 ( 231); One end is formed to be engaged with the abrasive stone expansion bar 222 is installed on the abrasive stone support shaft, the other end is attached to the abrasive stone, at least one oil to the end of the oil line 228 and the oil line 228 therein A pair of abrasive stone support plates 230 formed with a jet hole 229 disposed in a symmetrical structure with respect to the abrasive stone support shaft; A flexible hose 227 connecting the oil injection line 226 and the oil line 228; Mould tube fixing material removal and oil injection device, characterized in that it comprises a vertical adjustment unit 300 that can adjust the cylinder 210 up and down. The method of claim 1, The abrasive stone support shaft 231 is formed on the lower side of the cylinder 210 is removed from the old tube, characterized in that formed by the cam 250 driven by the cam motor 251 to enable the vertical flow Oil injection device. The method of claim 1, The vertical adjustment unit 300 includes a limit bar 340 attached to the side of the cylinder 210; The end of the limit bar 340 is interpolated to remove the molybdenum tube, characterized in that consisting of the upper and lower adjustment shaft 310 formed so that the height can be adjusted by the upper limit switch 320 and the lower limit switch 330 And oil injection devices.