KR101299738B1 - System for reducing the difference of cooling rates between top portion and bottom portion of hot-rolled wire rod - Google Patents

System for reducing the difference of cooling rates between top portion and bottom portion of hot-rolled wire rod Download PDF

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KR101299738B1
KR101299738B1 KR1020100135508A KR20100135508A KR101299738B1 KR 101299738 B1 KR101299738 B1 KR 101299738B1 KR 1020100135508 A KR1020100135508 A KR 1020100135508A KR 20100135508 A KR20100135508 A KR 20100135508A KR 101299738 B1 KR101299738 B1 KR 101299738B1
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South Korea
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air
blower
cooling
duct
wire rod
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KR1020100135508A
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Korean (ko)
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KR20120073677A (en
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위상권
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주식회사 포스코
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Abstract

A wire coil uniform cooling system capable of uniformly cooling hot rolled wire coils is introduced.
The wire coil uniform cooling system of the present invention comprises: a conveying unit including an air cooling tunnel including two sidewalls facing each other, and a chain belt conveyor installed on the bottom of the air cooling tunnel; A rotating part including a rotating plate loaded with a wire coil and rotatably mounted on the chain belt conveyor, and a power tool for applying a rotational force to the wire coil; A lower blower for supplying cooling air to the lower portion of the wire coil; An upper portion for cooling air to the upper portion of the wire rod by operating simultaneously with the lower blower so as to form a cooling air vortex in the inner hollow area of the wire rod to uniformly cool the upper, lower and center portions of the wire rod. Blower; And a side air blower which operates simultaneously with the upper air blower and the lower air blower, and communicates with both sidewalls of the air cooling tunnel to supply cooling air to an outer surface of the wire rod coil. A lower duct leading to the lower side of the lower duct, and a lower vane disposed at an end of the lower duct so that the angle can be adjusted, and the upper air blowing unit includes an upper duct for directing the cooling air to the upper side of the wire rod, An upper vane is installed to adjust the angle, and the side blower includes a side duct for guiding cooling air to the side of the wire rod, and a side vane to be adjustable at an end of the side duct.

Description

System for reducing the difference of cooling rates between top portion and bottom portion of hot-rolled wire rod}

The present invention relates to a uniform cooling system of wire rod coils, and more particularly, to a uniform cooling system of wire rod coils which are wound in a coil form after hot rolling and minimized cooling deviations of the wire rod coils loaded on the chain conveyor.

The wire-rod manufacturing process produces semi-finished products by heating, rolling and cooling processes of cast steel, for example, billets, which are generally 5.5 diameters depending on the diameter of the product. Small diameter wires (mm ~ 17mm) and large diameter wires (17mm ~ 50mm) are cooled through a cooling table to obtain the desired properties of the product.

On the other hand, Figure 1 and Figure 2 shows the cooling during the movement after the winding of the conventional large diameter wire rod.

That is, as shown in Figures 1 and 2, in the large diameter wire rod of 17mm ~ 50mm wire rod 1 of about 900 ℃ rolled in a straight state is wound in a coil form in a winding machine (not shown), the wound wire The coil 1 passes through the air cooling tunnel while being transported through the transport chain conveyor 3 associated with the winding machine, and the cooling air 5 introduced through the lower air outlet 4 disposed under the transport chain conveyor 3. Cooled through. Of course, the wire coil 1 conveyed through the transfer chain conveyor 3 in FIG. 1 may be naturally cooled in contact with the atmosphere during movement.

However, in general, the wire rod product rolled and wound at a high temperature state is naturally cooled through air exposure or forced cooling through air blowing to obtain proper structure according to the steel grade. In any case, the wound wire coil 1 is The bottom of the wire coil 1 in contact with the transport chain conveyor 3 seated is rapidly cooled by heat transfer through the transport chain conveyor 3 as compared to the other parts of the wire coil 1, and thus the wire coil. Cooling nonuniformity (deviation) of (1) will arise. That is, the cooling air 5 blown vertically from the bottom passes through the hollow region 6 of the wire rod 1 and exits to the upper portion, contributing to the cooling of the high temperature region formed at the center in the center of the wire coil 1 at all. Will not be able to.

As such, the temperature of the lower end of the wire coil 1 which is in contact with the transfer chain conveyor 3 and is directly cooled by the cooling air 5 and the upper part exposed to the outside air can be easily cooled, while the central part There is a problem that the cooling air (4) does not affect enough to cool the heat of the wire rod (1) deposited, and the heat loss is very low because it is not exposed to external air.

Therefore, the temperature variation is caused by the uneven cooling of the wire rod coil during forced air cooling or natural cooling during the movement through the transfer chain conveyor 3 during the cooling of the wire rod coil 1, in particular, the large diameter wire rod coil. On the other hand, the top of the wire coil 1 (top) also has a large area exposed to the atmosphere to cool faster than the middle of the wire coil through the radiant heat transfer.

In addition, in the case of natural cooling of the wire rod coil, cooling unevenness occurs in the inner coil part (inner side) and the outer coil part (outer side) of the wire rod coil. As a result, the outer circumference becomes cooler faster by radiative and convective heat transfer. In other words, the wire coil which is cooled during the movement through the conventional transfer chain conveyor is not uniformly cooled as a whole, and such cooling variation leads to material deviation of the wire coil product. In addition, in the correction process, which is a post-cooling process, the top and bottom of the wire coil having severe material deviations are cut and scraped in units of rings, and thus, waste of material and cost are added due to the addition of the wire coil trimming step. Of course, the problem of lowering the final wire rod productivity also occurred.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as adhering to the prior art already known to those skilled in the art.

The present invention, in order to solve the conventional problems, while rotating the wire coil to blow the cooling air from the outer surface, as well as the wire coil to uniformly cool the wire coil by forcibly blown by using the cooling air at the same time up and down direction. The purpose is to provide a uniform cooling system.

The wire coil uniform cooling system according to the present invention for achieving the above object is a transport unit comprising an air cooling tunnel consisting of both side walls facing each other, and a chain belt conveyor installed on the bottom of the air cooling tunnel; A rotating part including a rotating plate loaded with a wire coil and rotatably mounted on the chain belt conveyor, and a power tool for applying a rotational force to the wire coil; A lower blower for supplying cooling air to the lower portion of the wire coil; An upper portion for cooling air to the upper portion of the wire rod by operating simultaneously with the lower blower so as to form a cooling air vortex in the inner hollow area of the wire rod to uniformly cool the upper, lower and center portions of the wire rod. Blower; And a side air blower which operates simultaneously with the upper air blower and the lower air blower, and communicates with both sidewalls of the air cooling tunnel to supply cooling air to an outer surface of the wire rod coil. A lower duct leading to the lower side of the lower duct, and a lower vane installed at an end of the lower duct so that the angle can be adjusted, and the upper air blowing unit includes an upper duct for directing cooling air to the upper side of the wire rod, and at the end of the upper duct. It includes an upper vane is installed to adjust the angle, the side blower is characterized in that it comprises a side duct to guide the cooling air to the side of the wire coil, and the side vane is adjustable to the end of the side duct.

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It characterized in that the driving teeth protrude on one surface of the air-cooled tunnel so that the outer circumferential surface of the rotating plate moving on the chain belt conveyor.

The drive tooth is characterized in that the inclined in the direction of movement of the wire coil.

A plurality of side blowers are installed on both sidewalls of the air-cooled tunnel at regular intervals, and each side blower installed on both sidewalls facing each other is staggered from each other.

The side duct is inclinedly coupled to the side wall of the air-cooled tunnel.

The present invention improves the completeness of the product as the wire coil is uniformly cooled due to the above technical configuration.

1 is a view showing a conventional wire coil cooling method,
2 is a view showing the flow of cooling air according to the conventional wire coil cooling method,
3 is a plan view schematically illustrating the wire coil uniform cooling system of the present invention;
4 is a view showing a state in which the wire coil rotates in the wire coil uniform cooling system of the present invention,
5 is a front schematic view of a wire coil uniform cooling system of the present invention;
6 is a view showing the flow of cooling air in the hollow region of the wire coil when the wire coil uniform cooling method of the present invention,
7 is a view showing an embodiment of the upper and lower vanes angle adjusted in the wire coil uniform cooling system of the present invention,
8 is a view showing another embodiment of the angle-adjusted upper and lower vanes in the wire coil uniform cooling system of the present invention,
9 is a view showing another embodiment of the upper and lower vanes angle adjusted in the wire coil uniform cooling system of the present invention.

Hereinafter, a wire coil uniform cooling system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in Figures 3 and 4, the wire coil uniform cooling system according to the present invention is the transfer unit 40, the rotary unit 50, the lower blower 10, the upper blower 20 and the side blower 30 ).

As shown in FIG. 3, the conveying part 40 includes an air cooling tunnel 42 and a chain belt conveyor 44, and the rotating part 50 includes a rotating plate 52 and a power tool 54. The rotating part 50 is manufactured in the shape of a disk, and a plurality of the rotating parts are rotatably installed on the chain belt conveyor 44. The wire rod C is loaded therein. The power tool 54 functions to add rotational force to the wire coil C loaded on the rotating plate 52. Therefore, the wire coil C moving on the chain belt conveyor 44 is moved while rotating by receiving the force from the power tool 54.

In addition, side air blowers 30 are provided on both sidewalls of the air cooling tunnel 42 to communicate with the inside of the air cooling tunnel 42 to supply cooling air. The cooling air supplied from the side blower part 30 is forcedly blown toward the outer surface of the wire rod C. Since the cooling air simultaneously contacts the entire outer circumferential surface of the wire rod C, the wire rod coil can be uniformly cooled. have.

The side blower 30 includes a side duct 32 for guiding cooling air to the side of the wire coil C, and a side vane 34 provided at an end of the side duct 32 so that the angle can be adjusted. desirable. By adjusting the angle of the side vanes 34, it is possible to determine the blowing direction of the cooling air, thereby obtaining an improved uniform cooling effect.

On the other hand, the power tool 54 for applying the rotational force to the wire coil (C) moving on the chain belt conveyor 44, it is preferable to use a drive tooth (54a). The drive tooth 54a is formed to protrude on one surface of the air cooling tunnel 42 so as to be in contact with the outer circumferential surface of the rotating plate 52. Therefore, while the wire coil C moves in one direction, the outer circumferential surface of the rotating plate 52 comes into contact with the drive teeth 54a. When the rotating force is generated and the rotating plate 52 is rotated, the wire coil C also rotates. It is cooled while rotating.

The drive tooth 54a is preferably formed to be inclined in the moving direction of the wire coil C. In order to increase the contact area with the wire coil C, it is possible to more easily obtain rotational force.

Side blower 30 is provided in a plurality of spaced at regular intervals on both side walls of the air-cooled tunnel 42, each side air blower 30 is installed on both side walls facing each other of the air-cooled tunnel 42 are alternately installed It is desirable to. In addition, the side duct 32 of the side blower 30 is preferably coupled to the side wall of the air cooling tunnel 42 inclined. Therefore, the cooling air supplied inclinedly from the side blowers 30 alternately installed on both sidewalls forms vortices with each other on the outer circumferential surface of the wire rod C, and this effect is further caused by the rotating wire rod C. It can be deepened, and ultimately, it is possible to maximize the uniform cooling effect of the wire coil (C).

Meanwhile, as shown in FIG. 5, the wire coil uniform cooling system of the present invention includes a lower blower 10 and an upper blower 20 that operate simultaneously with the side blower 30.

The lower blower 10 includes a first blower 12, a lower duct 14, a first damper 16, a lower vane 18, and a first flow meter 19. The first blower 12 installed on one side of the wire coil C sucks cooling air and blows the cooling air to the lower air vent 10a through the lower duct 14. The flow rate of the cooling air is controlled by the first damper 16 installed in the lower duct 14, and the first flow meter 19 measures the amount of cooling air blown and displays it for the operator to grasp. The lower part of the wire coil (C) is in contact with the chain conveyor (B), the cooling air introduced through the lower blower 10 is to pass through the wire coil (C).

The upper blower 20 includes a second blower 22, an upper duct 24, a second damper 26, an upper vane 28, and a second flowmeter 29. The second blower 22 installed on the other side of the wire coil C blows the cooling air to the upper air vent 20a through the upper duct 24. The flow rate of the cooling air is controlled by the second damper 26 installed inside the upper duct 24, and the second flow meter 29 measures the amount of cooling air like the first flow meter 19 and displays it to the operator. The upper part of the wire rod C is exposed to air, and the cooling air introduced through the upper blower 20 passes through the inside of the wire coil C.

As shown in Figure 5 and 6, the wire coil uniform cooling method according to the present invention by forcibly cooling the cooling air at the same time through the upper air outlet 20a and the lower air outlet 10a, the process proceeds.

The wire coil C passing through the air cooling tunnel 42 has cooling air at the same time in the upper and lower portions thereof through the upper air vent 20a formed at the end of the upper duct 20 and the lower air vent 10a formed at the end of the lower duct 10. Is injected. Cooling air introduced into the hollow area CA from the upper and lower parts of the wire rod C is struck or staggered in the middle to generate vortex of cooling air, which causes the cooling air to flow into the wire coil C. It will exit from the inside to the outside. Therefore, the cooling effect can be obtained even in the high temperature part (intermediate region) of the hollow region CA of the wire rod C.

In particular, when the vortex phenomenon is further deepened in the hollow area CA of the wire coil C, the cooling effect is further improved. For this purpose, the upper vane at the end of the upper duct 20 and the lower duct 10 is improved. It is preferable to incline the direction of the cooling air supplied by installing the 28 and the lower vanes 18. Due to the inclined cooling air, the vortex phenomenon is further deepened in the hollow area CA of the wire coil C, and a more uniform cooling effect can be obtained.

The upper vanes 28 and the lower vanes 18 may be installed to be inclined in various directions to deepen the vortex generation in the hollow region CA of the wire rod C.

As shown in FIG. 7, the cooling air flowing from the upper tuyeres 20a based on the hollow axis central axis A is deflected by an angle to the right, and the cooling air flowing from the lower tuyeres 10a is left. It is preferable to adjust the upper vane 28 and the lower vane 18 so as to be deflected by a predetermined angle.

In addition, as shown in FIG. 8, in order to deepen the vortex formation, the upper tuyeres 20a are divided into the upper left tuyeres 20b and the upper right tuyeres 20c on the basis of the hollow region central axis A. The lower blower 10a is preferably divided into a lower left blower 10b and a lower right blower 10c. Based on this, the upper vane 28 and the lower vane 18 are blown by a predetermined angle deflection to the right with respect to the central axis A of the hollow region. By adjusting the upper vane 28 and the lower vane 18 so that the upper right side vent (20c) and the lower left side vent (10c) can be deflected by a predetermined angle to the left side of the hollow axis center axis (A). In this way, the desired purpose can be achieved.

Further, as shown in FIG. 9 to deepen the vortex formation, the upper tuyeres 20a are divided into the upper left tuyeres 20b and the upper right tuyeres 20c on the basis of the central region A of the hollow region, and the lower The tuyeres 10 are preferably divided into a lower left tuyere 10b and a lower right tuyere 10c. Based on this, the upper left side air vent 20b and the lower right side air outlet 10c are blown to the left by a predetermined angle with respect to the central axis A of the hollow area, and the upper right side air outlet 20c and the lower left side air outlet ( 10b) by adjusting the upper vane 28 and the lower vane 18 so as to be blown by a predetermined angle right deflection relative to the hollow region center axis (A), it is possible to achieve the desired purpose.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10: lower blower 10a: lower blower
10b: Lower left side vent 10c: Lower right side vent
12: first blower 14: lower duct
16: first damper 18: lower vanes
19: first flow meter 20: lower air blowing unit
20a: Lower blower 20b: Lower left blower
20c: Lower right side air outlet 22: Second blower
24: upper duct 26: second damper
28: upper vane 29: second flow meter
30: side blower 32: side duct
34: side vane 40: transfer section
42: air cooling tunnel 44: chain belt conveyor
50: rotating part 52: rotating plate
54: power tool 54a: drive tooth
C: wire rod CA: hollow area
A: center of wire rod coil

Claims (9)

delete delete delete A conveying unit including an air cooling tunnel having both sidewalls facing each other, and a chain belt conveyor installed on the bottom of the air cooling tunnel;
A rotating part including a rotating plate loaded with a wire coil and rotatably mounted on the chain belt conveyor, and a power tool for applying a rotational force to the wire coil;
A lower blower for supplying cooling air to the lower portion of the wire coil;
An upper portion for cooling air to the upper portion of the wire rod by operating simultaneously with the lower blower so as to form a cooling air vortex in the inner hollow area of the wire rod to uniformly cool the upper, lower and center portions of the wire rod. Blower; And
Simultaneous operation with the upper blower, the lower blower, and in communication with both side walls of the air-cooled tunnel includes a side blower for supplying cooling air to the outer surface of the wire coil,
The lower blower part includes a lower duct for guiding cooling air to the lower side of the wire rod and a lower vane installed at an end of the lower duct so that the angle can be adjusted. A duct and an upper vane installed at an end of the upper duct so that the angle can be adjusted, and the side blower includes a side duct for guiding cooling air to the side of the wire rod, and an angle adjustable side at the end of the side duct. Uniform cooling system of the wire coil, characterized in that it comprises a vane. delete 5. The uniform cooling system of claim 4, wherein a driving tooth is protruded on one surface of the air cooling tunnel so that an outer circumferential surface of the rotating plate moving on the chain belt conveyor is in contact with each other. The uniform cooling system of claim 6, wherein the driving tooth is formed to be inclined in a moving direction of the wire coil. 5. The uniform cooling system of claim 4, wherein a plurality of side blowers are installed at both side walls of the air-cooled tunnel at regular intervals, and each side blowers installed on both side walls facing each other are alternately installed. . The uniform cooling system of claim 4, wherein the side duct is inclinedly coupled to a side wall of the air cooling tunnel.
KR1020100135508A 2010-12-27 2010-12-27 System for reducing the difference of cooling rates between top portion and bottom portion of hot-rolled wire rod KR101299738B1 (en)

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KR1020100135508A KR101299738B1 (en) 2010-12-27 2010-12-27 System for reducing the difference of cooling rates between top portion and bottom portion of hot-rolled wire rod

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KR1020100135508A KR101299738B1 (en) 2010-12-27 2010-12-27 System for reducing the difference of cooling rates between top portion and bottom portion of hot-rolled wire rod

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KR101299738B1 true KR101299738B1 (en) 2013-08-23

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KR102080934B1 (en) * 2018-04-18 2020-02-24 (주)알룩스메뉴펙처링 air quenching device for cylinder block and cylinder head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55109515A (en) * 1979-02-16 1980-08-23 Nippon Steel Corp Cooler for rod in coil
JP2005118806A (en) * 2003-10-15 2005-05-12 Sumitomo Metal Ind Ltd System for cooling wire rod coil
JP2009233718A (en) * 2008-03-27 2009-10-15 Kobe Steel Ltd Cooling method for wire rod coil and cooling apparatus used for the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55109515A (en) * 1979-02-16 1980-08-23 Nippon Steel Corp Cooler for rod in coil
JP2005118806A (en) * 2003-10-15 2005-05-12 Sumitomo Metal Ind Ltd System for cooling wire rod coil
JP2009233718A (en) * 2008-03-27 2009-10-15 Kobe Steel Ltd Cooling method for wire rod coil and cooling apparatus used for the same

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