KR20110010466A - Cooler for hot rolling facilities - Google Patents

Abstract

PURPOSE: A cooling device for a rolling mill is provided to reduce the number of pipes for supplying cooling water by employing a branch part for simultaneously supplying cooling water to upper and lower rollers. CONSTITUTION: A cooling device for a rolling mill comprises a first spray pipe(52), a second spray pipe(54), a supply pipe(70), and a branch part(80). The first spray pipe is arranged between a guide block(30) and an upper roller(12) and supplies cooling water to the upper roller, wherein the guide block is installed on the exit side of a press roller. The second spray pipe is arranged between the guide block and a lower roller(14) and supplies cooling water to the lower roller. The supply pipe is provided with cooling water from a water source. The branch part guides the provided cooling water to the first spray pipe and the second spray pipe.

Description

Cooling device for rolling mill {COOLER FOR HOT ROLLING FACILITIES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chiller for a rolling mill, and more particularly to a chiller for a mill that cools an apparatus for rolling and suppresses deformation of a work object.

General steel production consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a regeneration process in which iron in a liquid state becomes a solid, and a rolling process in which iron is made of steel or wire.

The process of making pig iron, the first step in the process of making steel from iron ore, is called steelmaking and steelmaking, and the process of making steel from pig iron is called steelmaking.

The casting process is a process in which molten steel, which is a liquid ecology, is injected into a mold, and then passed through a continuous casting machine to cool and solidify to continuously form an intermediate material such as slab or bloom.

In this process, the bloom is converted into a billet (Billet) again through a rolling mill, and processed into a wire rod through a wire mill.

In addition, the slab is made of a hot rolled coil or a hot rolled steel sheet while being produced in a thick plate through a thick plate rolling mill or passed through a hot rolling mill.

Rolling refers to a process in which slabs, blooms, billets, etc. produced in a continuous casting process are passed through a plurality of rotating rollers to apply a continuous force to increase or thin them, and are roughly divided into hot rolling and cold rolling.

In this way, the rollers through which work objects such as high-temperature slabs, blooms, and billets pass are heated to high temperatures, so that a cooling device is installed to prevent the rollers from overheating above a predetermined temperature in order to prevent malfunction or damage due to deformation or deformation of the rollers. do.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

Since the cooling apparatus according to the prior art sprays the cooling water from the upper part to the lower part of the rolling roller which performs the rolling operation, the cooling water is easily contacted with the work object passing through the rolling roller, so that the hot work object is partially quenched to improve the quality of the product. There is a problem of deterioration.

In addition, the cooling apparatus according to the prior art has a problem that it is difficult to reduce the number of parts required to cool the upper roller and the lower roller of the rolling roller to perform the rolling operation.

Therefore, there is a need for improvement.

An object of the present invention is to provide a cooling apparatus for a rolling mill, which has been devised to improve the above problems, and at the same time cooling the apparatus for performing the rolling operation and at the same time suppressing the contact of the coolant with the workpiece.

In addition, an object of the present invention is to provide a cooling apparatus for rolling mills capable of reducing the number of parts required for cooling the apparatus for rolling.

The present invention to achieve the above object, the first injection pipe for supplying cooling water to the upper roller; A second injection pipe for supplying cooling water to the lower roller; A supply pipe receiving coolant from a water supply source; And a branch part for guiding the cooling water supplied along the supply pipe to the first injection pipe and the second injection pipe.

In addition, the first spray pipe of the present invention is characterized in that it is disposed between the guide block and the upper roller is installed on the outlet side of the rolling roller.

In addition, the second injection pipe of the present invention is characterized in that it is disposed between the guide block and the lower roller is installed on the outlet side of the rolling roller.

In addition, the supply pipe of the present invention, a supply unit spaced apart from the guide block; And a bending part bent from the supply part and connected to the branch part.

In addition, the supply unit of the present invention is disposed so that the work object is perpendicular to the traveling direction, the bent portion is arranged to be parallel to the traveling direction of the work object, the bent portion is characterized in that connected to the center perpendicular to the branch portion do.

The cooling device for a rolling mill according to the present invention is divided into a portion through which the coolant is injected and a portion through which the work object passes, so that the cooling water sprayed on the rolling roller is suppressed from contacting the work object. There is an advantage that the object can be suppressed from being deformed by the coolant.

In addition, the cooling device for a rolling mill according to the present invention is installed by the branch to supply the cooling water to the upper roller and the lower roller at the same time, it is possible to reduce the number of pipes for supplying the cooling water to reduce the time and cost required to install the cooling device There is an advantage to this.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a chiller cooling apparatus according to the present invention.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a view showing a cooling apparatus for a rolling mill according to an embodiment of the present invention, Figure 2 is a perspective view showing a cooling apparatus for a rolling mill according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is a front view which shows the injection hole part of the cooling device for rolling mills which concerns on the example.

1 to 3, the cooling apparatus for a rolling mill according to an embodiment of the present invention supplies a cooling water to the first spray pipe 52 and a lower roller 14 to supply cooling water to the upper roller 12. To the first injection pipe 52 and the second injection pipe 54 to supply the second injection pipe 54, the supply pipe 70 receiving the cooling water from the water supply source, and the cooling water supplied along the supply pipe 70. It includes a branch 80 to be.

When the rolling operation is started, as the rolling rollers 12 and 14 are rotated, the work object passes through the gap between the upper roller 12 and the lower roller 14 to perform the rolling operation. It is moved along the 30 to pass through the next rolling rollers (12, 14).

At this time, the cooling water supplied along the supply pipe 70 from a water supply source such as a pump is branched while passing through the branch 80 and moved to the first injection pipe 52 and the second injection pipe 54, and then the first minute water. It is injected to the upper roller 12 and the lower roller 14 through the injection hole 56 formed in the yarn pipe 52 and the second injection pipe (54).

The branch portion 80 includes a pipe 82 to which a supply pipe 70 is connected to a central portion, a first injection pipe 52 is connected to one end, and a second injection pipe 54 is connected to the other end. .

Of course, the branch portion 80 may be variously changed, such as a 'V'-shaped pipe or a' ㅗ '-shaped pipe, which can be easily implemented by those of ordinary skill in the art aware of the technical configuration of the present invention another embodiment Detailed drawings or descriptions thereof will be omitted.

In this way, by installing one water supply source and installing one supply pipe 70 to supply cooling water to the upper roller 12 and the lower roller 14, the number of parts is reduced and the cost for cooling operation can be reduced. Will be.

Since the first injection pipe 52 and the second injection pipe 54 are disposed long in the rotational axis direction of the rolling rollers 12 and 14, the injection hole 56 is formed on the circumferential surface opposite to the rolling roller 12. Cooling water supplied along the branch 80 is discharged to the injection hole 56 is injected to the rolling rollers (12, 14).

The injection hole 56 is formed in a slit shape that is formed long in the axial direction of the first injection pipe 52 and the second injection pipe 54, and the above operation is possible even when a plurality of hole parts are continuously formed. Since a person skilled in the art having the technical constitution of the present invention can be easily changed and practiced, specific drawings or descriptions of other embodiments will be omitted.

The first spray pipe 52 is disposed between the guide block 30 and the upper roller 12 installed on the exit side of the rolling rollers 12 and 14, and the second spray pipe 54 is a rolling roller 12, 14 is disposed between the guide block 30 and the lower roller 14 installed on the outlet side.

Since the workpiece is inserted into the guide block 30 after passing through the rolling rollers 12 and 14, the first injection pipe 52 and the second injection pipe 52 and the second roller are disposed between the guide block 30 and the rolling rollers 12 and 14. The injection pipe 54 is disposed in a different space from the workpiece.

Accordingly, the coolant discharged from the first spray pipe 52 and the second spray pipe 54 is in contact with the rolling rollers 12 and 14, but is prevented from coming into contact with the work object passing through the rolling rollers 12 and 14. Do not deform the workpiece by contact.

In addition, since the coolant is sprayed on the upper roller 12 rotated in the counterclockwise direction and the lower roller 14 rotated in the clockwise direction, the coolant sprayed on the upper roller 12 contacts the upper roller 12 and then moves upward. After being moved and evaporated, the coolant sprayed on the lower roller 14 is moved downward after contacting the lower roller 14 so that the cooling water and the work object can be more effectively suppressed from contacting.

The supply pipe 70 includes a supply part 72 disposed to be spaced apart from the guide block 30, and a bent part 74 bent from the supply part 72 and connected to the branch part 80.

Since the supply unit 72 is installed to be substantially perpendicular to the path where the work object is moved, the supply unit 72 is prevented from interfering with other devices arranged around the guide block 30, and the bent part 74 is a guide block. It is fixed to or adjacent to the side of 30, and is arrange | positioned in the position close to the 1st injection pipe 52 and the 2nd injection pipe 54. As shown in FIG.

Looking at the operation of the cooling device for a rolling mill according to an embodiment of the present invention configured as described above are as follows.

First, when the rolling process is started, the hot working object passes through the rolling rollers 12 and 14 to perform a rolling operation, and the work object passing through the rolling rollers 12 and 14 passes through the guide block 30 and then turns. It passes through the rolling rollers (12, 14).

At this time, the cooling water is supplied along the supply pipe 70 by the driving of the pump, and the cooling water passing through the supply part 72 and the bent part 74 of the supply pipe 70 passes through the branch part 80 and is the first injection pipe. 52 and second injection pipe 54 are supplied.

Cooling water discharged from the first injection pipe 52 and the second injection pipe 54 through the injection hole 56 is in contact with the upper roller 12 and the lower roller 14, respectively, so that the upper roller 12 and the lower roller Overheating of (14) is prevented.

As a result, it is possible to simultaneously cool the pair of rolling rollers 12 and 14, that is, the upper roller 12 and the lower roller 14 with one pump and the supply pipe 70.

At this time, the coolant in contact with the upper roller 12 is evaporated while being moved upward after colliding with the upper roller 12 rotated counterclockwise, and the coolant in contact with the lower roller 14 is rotated clockwise. After colliding with the roller 14, it falls downward.

The cooling water thus moved performs a cooling operation in a separate space from the work object passing through the guide block 30, thereby suppressing the coolant from being deformed in contact with the work object.

Thereby, it becomes possible to provide the cooling device for rolling mills which can cool the apparatus which performs a rolling operation, suppresses contact of a cooling water with a workpiece | work object, and can reduce the number of components.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand.

In addition, the cooling device for the rolling mill has been described as an example, but this is merely illustrative, and the cooling device of the present invention may be used in other products than the rolling mill.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a view showing a cooling device for a rolling mill according to an embodiment of the present invention.

2 is a perspective view showing a cooling apparatus for a rolling mill according to an embodiment of the present invention.

Figure 3 is a front view showing the injection hole of the cooling device for a rolling mill according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

12: upper roller 14: lower roller

30: guide block 52: first injector

54: second injection pipe 70: supply pipe

80: branch

Claims (5)

A first injection pipe for supplying cooling water to the upper roller; A second injection pipe for supplying cooling water to the lower roller; A supply pipe receiving coolant from a water supply source; And And a branch for guiding the cooling water supplied along the supply pipe to the first spray pipe and the second spray pipe. The method of claim 1, The first spray pipe is a cooling device for a rolling mill, characterized in that disposed between the guide block and the upper roller is installed on the outlet side of the rolling roller. The method of claim 1, The second spray pipe is a cooling device for a rolling mill, characterized in that disposed between the guide block and the lower roller is installed on the outlet side of the rolling roller. According to claim 2 or 3, wherein the supply pipe, A supply unit spaced apart from the guide block; And Cooling apparatus for a rolling mill, characterized in that it comprises a bent portion is bent from the supply portion connected to the branch. The method of claim 4, wherein The supply unit is disposed so that the work object is perpendicular to the traveling direction, the bent portion is arranged to be parallel to the traveling direction of the work object, the bent portion is characterized in that connected to the center of the branch orthogonal cooling device.

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