JP3387296B2 - Shaped steel cooling system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaped steel cooling device for cooling shaped steel such as H shaped steel and angle shaped steel in a production line.

[0002]

2. Description of the Related Art Generally, in a factory for manufacturing shaped steel such as H-shaped steel and angle-shaped steel, shaped steels of various sizes are manufactured on the same manufacturing line. Those between 150 and 300 mm are manufactured on the same manufacturing line. At this time, since the temperature of the H-section steel web is usually lower than the temperature of the flange, the web buckles and a web wave is generated. Generally, in order to prevent the web wave, the flange is generally cooled from the outside. Is being done. In order to perform such flange cooling, it is necessary to use a cooling device that matches the flange width.

As a technique capable of uniformly cooling the flange even if the flange width of the H-section steel is changed, JP-A-62-62
There is a cooling device disclosed in Japanese Patent No. 248507. This cooling device moves the cooling water sprayed from the spray nozzle for cooling the flange according to the flange width, moves the masking plate, and interrupts a part of the cooling water sprayed by the masking plate. The cooling width is controlled.

However, in this cooling device, the device for moving the masking plate becomes large in scale, and therefore the maintainability of the device including the masking plate is extremely poor. In addition, the cooling water blocked by the masking plate falls and collides unsteadily with the cooling water that is jetting therebelow, so that there is a problem that the jetting cooling water is disturbed and prevents uniform cooling of the flange. is there.

In view of the above, as a cooling device that does not use a masking plate, as shown in Japanese Utility Model Laid-Open No. 4-134204, a cooling device has been proposed in which a nozzle is rotated to adapt to a change in flange width. . However, in this cooling device, a device for rotating the nozzle is required for each nozzle, which complicates the structure around the nozzle, and the maintainability of the rotating mechanism including the nozzle is poor. Further, since the injection width of the nozzle changes with respect to the flange of the H-section steel, the water amount density in the flange width direction of each nozzle changes, which makes it difficult to perform uniform cooling.

[0006]

In order to solve such conventional problems, the cooling range is changed according to the flange width without using a masking plate or the like and without rotating the nozzle. Japanese Patent Laid-Open No. 5-31
There is a cooling device disclosed in Japanese Patent Publication No. 7948. In this cooling device, nozzles are arranged at equal intervals in the vertical direction with respect to a flange of H-shaped steel, and cooling water is sprayed only from nozzles corresponding to the flange width.

However, in this cooling device, since the nozzle is fixedly arranged in the vertical direction, the size of the new H-section steel, for example, the recently required flange width is 400.
When manufacturing H-section steel of mm or 500 mm, it may not be possible to deal with this. In addition, since the number of nozzles used differs depending on the size of the flange width, it is actually quite difficult to control the flow rate of the nozzles. Furthermore, a mechanism for turning the nozzles on and off, and a flow rate control provided for each nozzle or each stage There is a problem that a large amount of equipment cost is required due to the valve.

Further, in this cooling device, since the nozzles corresponding to the height of each flange are turned on and off to change the cooling width, the pressure fluctuation due to the change in the number of nozzle injections is large, and the flow rate is increased. It is difficult to control. Therefore, a flow control valve is required for each nozzle, for each stage, or for each group, and a large amount of equipment cost is required for the flow control valve and the process computer for controlling the flow control valve.

Further, since the nozzle of the cooling device is divided into a nozzle that is always used and a nozzle that is not always used by ON / OFF control according to the flange width,
There is a bias in how the nozzles are reduced. In particular, the number of nozzles used all the time decreases sharply, and the replacement intervals and inspection intervals of nozzles become short, and the cost and man-hours for this cannot be neglected.

The present invention has been made to solve the above problems, and for example, when the flange width of H-section steel is changed (for example, the flange width is changed between 150 mm and 500 mm). A cooling device for shaped steel that can smoothly change the cooling width without directly rotating or turning each nozzle ON-OFF, and can perform uniform cooling for any flange width. The purpose is to obtain. Another object of the present invention is to provide a cooling device for a shaped steel in which maintenance of a nozzle for injecting cooling water is easy and its life can be extended.

[0011]

(1) A shaped steel cooling device according to the present invention includes a conduit having a plurality of nozzles, one end of which is rotatably supported at a height position near the upper surface of a conveying roller. ,
A drive means for rotating the conduit with the one end as a fulcrum corresponding to the size of the shaped steel to be cooled, and a cooling water supply means for supplying cooling water to the conduit, and a central portion in the longitudinal direction of the conduit. A nozzle having a high water density is arranged in the vicinity.

(2) Further, in the cooling apparatus for shaped steel according to the present invention, the first conduit having a plurality of nozzles, and the plurality of nozzles, one end of which is supported at a height position near the upper surface of the conveying roller. A second group of pipes which are connected to each other through joints, and one end of the first pipe in a vertical direction corresponding to the size of the shaped steel to be cooled. Drive means for moving up and down, the first conduit and the second
Cooling water supply means for supplying cooling water to the conduit, and a nozzle having a high water density is disposed in the vicinity of the central portion in the longitudinal direction of the conduit group consisting of the first and second conduits.

(3) Further, the shaped steel cooling device according to the present invention is cooled by a conduit having a plurality of nozzles, one end of which is rotatably supported at a height position near the upper surface of the conveying roller. A plurality of nozzles are formed in an elliptical shape, and drive means for rotating the conduit with the one end as a fulcrum corresponding to the size of the shaped steel and cooling water supply means for supplying cooling water to the conduit. Is attached to the conduit so that its major axis is parallel to the conduit.

(4) Further, in the cooling apparatus for shaped steel according to the present invention, the first conduit having a plurality of nozzles, and the plurality of nozzles, one end of which is supported at a height position near the upper surface of the conveying roller. A second group of pipes which are connected to each other through joints, and one end of the first pipe in a vertical direction corresponding to the size of the shaped steel to be cooled. Drive means for moving up and down, the first conduit and the second
Cooling water supply means for supplying cooling water to the conduit, and the plurality of nozzles are formed into an elliptical shape, and the major axis thereof is the first diameter.
Is attached to the first and second conduits so as to be parallel to the first conduit and the second conduit, respectively.

[0015]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. FIG. 1 is a perspective view schematically showing a first embodiment of the present invention. In the figure, reference numeral 1 denotes H-shaped steel after rolling, which is conveyed in a direction of an arrow on a conveying line 5 composed of a large number of conveying rollers 6. 10 is a cooling device according to the present invention,
Although the same configuration is provided on both sides of the transfer line 5, the cooling device 10 on one side will be described below for the sake of simplicity.

In the cooling device 10, 11 is a plate-shaped guide provided on both sides of the transport line 5, and a plurality of fan-shaped openings 12 are provided in the longitudinal direction of the transport line 5 such that the downstream side is narrow and the upstream side is wide. There is. Reference numeral 13 denotes a conduit which is installed in each opening 12 or outside the opening 12 (on the side opposite to the transport line 5), the tip of which is closed, and the base of which is substantially the same height as the upper surface of the transport roller 6. It is rotatably supported by a bearing 15 provided at a position. Reference numeral 14 denotes a plurality of elliptical spray nozzles (hereinafter simply referred to as nozzles), which are mounted on the conduit 13 side of the conduit 13 at equal intervals so that the major axis thereof is parallel to the conduit 5. Shown in.

Reference numeral 16 is a drive device such as a motor, 17 is a wire guide provided on the guide 11, and a wire 18 wound around a pulley provided on the output shaft of the drive device 16 is connected to each conduit 13 via the wire guide 17. It is attached to the tip,
It is attached to the tip of the wire 13 by the driving device 16. Thus, when the drive device 16 winds the wire 18, the conduit 13 rotates about the bearing 15 as a fulcrum, and when the wire 18 is unwound, the conduit 13 rotates downward by its own weight. The driving means for the conduit 13 including the driving device 16, the wire 18 and the like may be provided for each conduit 13, or a plurality of conduits 13 may be driven by one driving means. Further, the driving means of the conduit 13 is not limited to the above, and other driving means may be used. 20
Is a cooling water buffer installed along the guide 11, and each conduit 13 is connected to a cooling water buffer 20 by a flexible hose 19.

In the cooling device 10 as described above, in the present embodiment, the opening 12 is provided at an angle of 10 to 45 ° or slightly wider than the lower surface of the guide 11. Further, the length of the conduit 13 was set to 700 mm, and ten guides 11 were provided at intervals of 1 m in the length direction. Furthermore, the inner diameter of the conduit 13 is such that the blowout pressure of the nozzle 14 is uniform,
When the short diameter of the nozzle 14 is 5 mm, it is set to 100 mm, and six nozzles 14 are provided. Further, in the initial state, the respective conduits 13 were set so that the angle θ with the transfer line 5 was 12 ° so that the flange width could correspond to the H-section steel of 150 mm. Table 1 shows the relationship between the flange width and the angle of the conduit 13 when the length of the conduit 13 is 700 mm. It should be noted that each of the above numerical values shows an example thereof and is not limited to this.

[0019]

[Table 1]

In the present embodiment configured as described above, when the size of the H-section steel 1 to be cooled is determined, the drive device 16 causes the conduit 13 to rotate upward or downward with the bearing 15 as a fulcrum to form an H-shape. The angle shown in Table 1 (for example, 12 ° when the flange size is 150 mm) is set corresponding to the flange size of the steel 1. Then, when the H-section steel 1 is transported on the transport line 5, the water supplied from the cooling water buffer 20 to each conduit 13 is jetted from the nozzle 14, and H
The flanges 3 are cooled from both sides of the shaped steel 1. H-shaped steel 1
When the size is changed, the conduit 13 is rotated upward or downward by the drive device 16 according to the flange size without stopping the production line, and the angles are set to those shown in Table 1.

Example 1 With the cooling device 10 of the present embodiment, the web height is 500 mm, the flange width is 150 mm,
H after rolling with a web thickness of 6 mm and a flange thickness of 12 mm
The shaped steel 1 was passed through the transportation line 5 to be cooled. According to Table 1, the angle of the conduit 13 at this time is 12 ° which is an initial value, the amount of cooling water is 1500 l / min, and the conveying speed is 1 m / se.
c. As a result of the cooling, the surface temperature difference in the width direction of the flange before and after cooling is as shown in FIG. 3, and it was possible to cool the entire surface of the flange almost uniformly.

(Embodiment 2) Further, the web height is 562 m.
m, a flange width of 500 mm, a web thickness of 50 mm, and a flange thickness of 55 mm, the H-section steel 1 was passed through the transport line 5 and cooled. At this time, the angle of the conduit 13 is set to the drive unit 1.
It is set to 45 ° shown in Table 1 by 6 and the cooling water is 5
The transport speed was 1 m / sec at 000 l / min.
Since the flange of this H-section steel 1 is thick, but the web is also thick, the cooling water amount may be about the same as that of the flange thickness of 12 mm. Therefore, the cooling water amount should be approximately equal to that when the flange width is 150 mm. 5000 l / min
And In this case, the amount of cooling water is adjusted by the pump on the water sending side, but it may be adjusted by other appropriate means.

As a result of cooling, as shown in the surface temperature difference between before and after cooling in FIG. 4, almost uniform cooling could be performed over the entire surface of the flange. The flange width of 150
The change in the angle of the conduit 13 with respect to the change from mm to 500 mm could be smoothly performed by the driving device 16 without stopping the production line.

Embodiment 2. FIG. 5 is a perspective view schematically showing the second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the substantially central portion of the conduit 13 in the longitudinal direction is closed by the partition plate 21 to open both ends,
The same number of nozzles 14 are attached to the upper side and the lower side, respectively, and two cooling water buffers 20a and 20b are installed side by side. For example, the base of the conduit 13 is connected to the flexible hose 1
9 is connected to the cooling water buffer 20a, and the end of the conduit 13 is connected to the cooling water buffer 2 by a flexible hose 19.
It is connected to 0b.

Further, in the embodiment of FIG. 6, not only the central portion of the conduit 13 in the longitudinal direction is closed by the partition plates 21, but also both ends of the conduit 13 are closed, and both sides of the partition plate 21 and the cooling water buffers 20a, 20a, 20b and flexible hoses 19, 19 respectively. Note that FIG. 5 and FIG.
In the above, the case where two cooling water buffers 20a and 20b are provided is shown, but two flexible hoses 19 and 19 may be connected to one cooling water buffer 20.

(Embodiment 1) An H-section steel 1 having a web height of 500 mm, a flange width of 150 mm, a web thickness of 6 mm and a flange thickness of 12 mm was cooled by a cooling device 10 shown in FIG.
It was cooled by being passed over the transfer line 5. At this time, the angle of the conduit 13 is 12 ° which is the initial value, and the amount of cooling water is the partition plate 21.
750 l / min on the upper side and 570 l / mi on the lower side
The conveyance speed was 1 m / sec. As a result of cooling, the surface temperature difference in the width direction of the flange before and after cooling is as shown in FIG. 7, and it was possible to cool the entire surface of the flange substantially uniformly. Similar results were obtained with the cooling device 10 shown in FIG.

(Embodiment 2) Next, the web height is 562 m.
m, a flange width of 500 mm, a web thickness of 50 mm, and a flange thickness of 55 mm, the H-section steel 1 was passed through the transport line 5 and cooled. At this time, the angle of the conduit 13 is set to the drive unit 1.
The cooling water amount was set to 45 ° by 6, and the cooling water amount was 2500 l / min on the upper side of the partition plate 21 and 2500 l / min on the lower side.
The transport speed was set to 1 m / sec. As a result of the cooling, as shown by the surface temperature difference in FIG. 8, the entire surface of the flange could be cooled substantially uniformly. In addition, the conduit 13 for changing the flange width from 150 mm to 500 mm
The angle can be changed smoothly by the drive device 16 without stopping the production line. Similar results were obtained with the cooling device 10 shown in FIG.

In the first embodiment (FIGS. 1 to 4), since only the lower end of the conduit 13 is connected to the cooling water buffer 20 by the flexible hose 19, there is no change in pressure between the upper side and the lower side of the conduit 13. It was large, and the cooling performance on either side tended to decrease. In the present embodiment, a substantially central portion of the conduit 13 is closed by a partition plate 21 and both sides thereof are cooled water buffers 20a, 20b (or 20), respectively.
Since the pressures on the upper side and the lower side of the conduit 13 are substantially equal to each other, the surface temperature difference in the width direction of the flange before and after cooling can be made substantially constant as described above. .

Embodiment 3. FIG. 9 is a perspective view schematically showing the third embodiment of the present invention, and one cooling device is omitted for simplification of description. The same parts as those of the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted. In the figure, reference numeral 12a designates a plurality of openings formed at substantially equal intervals in the longitudinal direction of the guide 11, and is formed in a substantially trapezoidal shape in which the central portion in the vertical direction on the downstream side of the transport line 5 is narrow and the upstream side is wide. (See FIG. 10 (c)). Thirteen
a and 13b are an upper conduit and a lower conduit arranged inside (or outside of the opening 12) each opening 12a.
The tips of a and 13b are closed, and the tips of the lower conduits 13b are fixed at substantially the same height as the upper surface of the transport roller 6.

The bases of the two conduits 13a and 13b are connected by a joint 22 and can rotate about the joint 22 as a fulcrum. In addition,
The joint 22 is free with respect to the guide 11. A plurality of elliptical nozzles 14 are attached to the conduits 13a and 13b on the side of the transport line 5 so that their major axes are parallel to the conduits 13a and 13b at equal intervals, and the upper conduit 13a is also provided. As in the first and second embodiments, one end of the wire 18 driven by the drive device 16 is attached to the tip of the. Both conduits 13
Flexible hoses 19 and 19 are connected to cooling water buffers 20a and 20b (the cooling water buffer may be one) at the bases of a and 13b.

Next, the position adjusting action of the conduits 13a and 13b of this embodiment will be described with reference to FIG. FIG. 10A shows the positions of the conduits 13a and 13b when the flange width of the H-section steel 1 to be cooled is 150 mm, and the WW line indicates the position of the web of the H-section steel 1 to be cooled (hereinafter referred to as the web). Line)
Indicates. The joint 22 is located on the web line W, the lower conduit 13b and the lower surface of the guide 11 and the angle between the lower conduit 13b and the web line W are 12 °, and the upper conduit 13b.
And the angle between the web line W and the web line W is 12 °, and both conduits 1
3a and 13b are located symmetrically with respect to the web line W.

When the flange width of the H-section steel 1 is 300 mm, as shown in FIG. 10 (b), the wire 18 is wound up by the driving device 16 to vertically raise the tip of the upper conduit 13a, and the joint 22 On the web line W. As a result, the angles formed by the two conduits 13a and 13b and the web line W are 25 ° as shown in Table 1. When the flange height of the H-section steel 1 is 500 mm, similarly, as shown in FIG. 10 (c), the upper conduit 13 a is likewise vertically lifted and the joint 22 is positioned on the web line W. As a result, the angles of the two conduits 13a and 13b with respect to the web line W are 45 ° as shown in Table 1.

As described above, in the present embodiment, the tip of the lower conduit 13b is fixed and the upper and lower conduits 13b are fixed.
The connecting portion (joint 22) of a and 13b is left free with respect to the guide 11, and the tip portion of the upper conduit 13a is vertically moved up or down, whereby the upper and lower conduits 13
The angles of a and 13b with respect to the web line W can always be set to a predetermined value. In the present embodiment,
The openings 12a are arranged at equal intervals in the longitudinal direction of the guide 11.
0 pieces are provided, and the lengths of the upper and lower conduits 13a and 13b accommodated in or near the opening 12a are 350 m, respectively.
m.

Example 1 A H-shaped steel 1 having a web height of 500 mm, a flange width of 150 mm, a web thickness of 6 mm and a flange thickness of 12 mm was cooled by a cooling device 10 shown in FIG. The upper and lower conduits 13a and 13b at this time
With respect to the web line W, the initial value is 12 °, the cooling water amount is 750 l / min, and the conveying speed is 1 m / se.
c. As a result of the cooling, uniform cooling was performed over the entire flange.

Example 2 Next, the web height is 562 m.
m, flange width 500 mm, web thickness 50 mm, flange thickness 55 mm after rolling H-section steel 1 was cooled. At this time, the angles of the upper and lower conduits 13a and 13b with respect to the web line W are adjusted to 45 ° by the drive device 16, the cooling water amount is 2500 l / min, and the conveying speed is 1 m.
/ Sec. As a result of the cooling, uniform cooling was performed over the entire flange. In addition, the upper and lower conduits 13a and 13b for the change from the flange width of 150 mm to 500 mm
The angle could be changed smoothly without stopping the production line.

Embodiment 4. Generally, H-shaped steel after rolling is
It is known that the temperature of the fillet portion (indicated by 4 in FIG. 1), which is the joint portion of the flange and the web, is high, and when the flange of H-section steel is cooled, the fillet portion is strongly cooled. In the present embodiment, in order to deal with the above problem, for example, in the second embodiment (FIG. 5), the amount of water injected from the both ends to the center of the nozzle 14 attached to the conduit 13. Is arranged so that the water content is high, and the water amount density distribution as shown in FIGS. 11 (a) and 11 (b) is obtained.

FIG. 11 shows a water amount density distribution for H-section steel with a flange width of 150 mm and 500 mm when the amount of water supplied to the conduit 13 is constant. By carrying out this embodiment, even when the flange width of the H-section steel is changed, it is possible to always obtain a similar water amount density distribution to the flange width.

In the present embodiment, as in the case of the second embodiment, the conduit 13 having a length of 700 m is set to 1 m in the line direction.
Ten pieces are arranged at intervals, the lower end of each conduit 13 is rotatably supported at a predetermined position via a bearing 15, and a wire 18 of a drive device 16 is attached to the upper end. Then, on the transport line 5 side of the conduit 13, the center side (partition plate 21
(Near), the elliptical nozzle 14 having a high water flow rate, and the elliptical nozzles 14 having a lower water density than both ends,
It is attached at substantially equal intervals so that its major axis is parallel to the conduit 13.

(Example 1) With the cooling device according to the present embodiment, the web height is 500 mm, the flange width is 150 mm,
H after rolling with a web thickness of 6 mm and a flange thickness of 12 mm
The shaped steel 1 was passed through the transportation line 5 to be cooled. At this time, the angle of the conduit 13 was 12 ° as an initial value, the cooling water amount was 750 l / min on the upper side and 750 l / min on the lower side, and the transport speed was 1 m / sec. As a result of cooling, the surface temperature difference in the flange width direction before and after cooling is shown in FIG.
As shown in (a), it can be seen that the center portion (fillet portion) in the width direction of the flange was cooled.

Example 2 Next, the web height is 562 m.
m, flange width 500 mm, web thickness 50 mm, flange thickness 55 mm after rolling H-section steel 1 was cooled. At this time, the angle of the conduit 13 was adjusted to 45 ° by the drive device 14, the cooling water amount was 2500 l / min on the upper side, 2500 l / min on the lower side, and the transport speed was 1 m / sec. As a result of the cooling, the surface temperature difference in the flange width direction before and after cooling is as shown in FIG. 12B, and it can be seen that cooling of the center portion (fillet portion) in the flange width direction is promoted. Also, from the flange width of 150 mm to 500
The angle of the conduit 13 with respect to the change to mm could be smoothly changed without stopping the production line. In the above description, the case where the present embodiment is applied to the cooling device of the second embodiment is shown, but the present embodiment can also be applied to the cooling device of the first or third embodiment. When the cooling device according to the third embodiment is used, the nozzle 14 may be further provided near the joint 22.

Embodiment 5. FIG. 13 is a perspective view schematically showing the fifth embodiment of the present invention. This embodiment is the second
With the cooling device 10 according to the embodiment (FIG. 5), the unequal angle steel 25, which is shaped steel having different left and right shapes, is cooled. The same parts as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

The unequal angle steel 25 is conveyed in a convex shape on the conveyor line 5 as shown in the figure at the time of rolling.
Since the short side portion 26 and the long side portion 27 of 5 have different thicknesses, bending is likely to occur in the longitudinal direction during the cooling process. Therefore, in general, the thickness of the short side portion 26 of the unequal angle chevron steel 25 is thicker than the thickness of the long side portion 27, so that the short side portion 26 is strongly cooled and the long side portion 27 is not cooled or is weakly cooled. Is going.

(Example 1) With the cooling device of this embodiment, the short side portion 26 has a width of 150 mm and the long side portion 27 has a width of 5.
The unequal angle steel 25 having a thickness of 50 mm, a short side portion 26 of 21 mm, and a long side portion 27 of 12 mm was cooled. At this time, as shown in FIG. 14, by the drive devices 16 and 16,
The height from the base of the tip of the conduit 13c on the short side 6 side is 1
The height from the base of the tip of the conduit 13d on the long side 27 side was set to 50 mm and 250 mm. Further, the cooling water amount of the conduit 13c on the side of the short side 26 is 2500 for both the upper side and the lower side.
Strong cooling with 1 / mien, conduit 13 on the long side 27 side
The cooling water amount of d is 1500 l / mi for both upper and lower sides.
Weakly cooled with n. The transport speed of the unequal angle angle steel 25 was set to 1 m / sec. Cooling effect, unequal angle steel 2
The surface temperature difference between the short side portion 26 and the long side portion 27 of No. 5 was within ± 16 ° at the stop temperature, and no bending due to the temperature difference was observed.

As described above, according to the present invention, it is possible to cool shaped steels having different left and right shapes and different cooling water amounts. In the above embodiment, the case where the unequal angle steel 25 is cooled by the cooling device of the second embodiment is shown, but it can be cooled by the cooling device of the first or third embodiment as well. .

In the above description, the case of cooling the H-section steel and the unequal angle section steel by the section steel cooling device according to the present invention has been described, but the section steels of other shapes can also be cooled. Further, the case where six nozzles are attached to the conduit and three nozzles are attached to each of the first and second conduits of the conduit group is shown, but the number of nozzles is not limited to this. It can be increased or decreased as appropriate. Further, each conduit of the conduit or the conduit group is shown to be supplied from one place, or from two places at both ends or the central part, but water may be supplied from three or more places. .

[0046]

According to the shaped steel cooling apparatus of the present invention,
The following effects can be obtained. (1) A conduit having a plurality of nozzles, one end of which is rotatably supported at a height position near the upper surface of the conveying roller, and one end of which is a fulcrum corresponding to the size of the shaped steel to be cooled. Since the driving means for rotating and the cooling water supplying means for supplying the cooling water to the conduit are provided and the nozzle having a high water density is arranged in the vicinity of the central portion in the longitudinal direction of the conduit, cooling of the shaped steels of various sizes is possible. This makes it possible to change the cooling width without stopping the production line even when the size is changed.

Further, since the cooling water is constantly sprayed on the entire surface of the flange, uniform cooling can be performed and defective shape of the shaped steel can be eliminated. Further, since all nozzles are used in shaped steel of any size, it is not necessary to turn on / off some of the nozzles, and a control system for this purpose is also unnecessary. Moreover, since there is no uneven consumption of the nozzle, the number of maintenance operations can be reduced. Further, when cooling the H-section steel, since the nozzle having a high water density always corresponds to the fillet portion, the entire flange can be cooled more uniformly.

(2) a first conduit having a plurality of nozzles,
And a conduit group having a plurality of nozzles, one end of which is supported at a height position near the upper surface of the transfer roller, and the other end of both conduits being connected via a joint, and a cooling pipe. Drive means for vertically elevating and lowering one end of the first conduit according to the size of the shaped steel to be formed;
And a cooling water supply means for supplying cooling water to the conduit, and a nozzle having a high water density is disposed in the vicinity of the longitudinal center of the conduit group consisting of the first and second conduits. In addition to the above effect, the individual cooling devices formed by the conduit group can be shortened.

(3) A conduit having a plurality of nozzles, one end of which is rotatably supported at a height position near the upper surface of the conveying roller, and one end of which is adapted to the size of the shaped steel to be cooled. Since the driving means for rotating as a fulcrum and the cooling water supply means for supplying the cooling water to the conduit are provided and the plurality of nozzles are formed in an elliptical shape and are attached to the conduit so that their major axes are parallel to the conduit, The same effect as the above (1) can be obtained.

(4) a first conduit having a plurality of nozzles,
And a conduit group having a plurality of nozzles, one end of which is supported at a height position near the upper surface of the transfer roller, and the other end of both conduits being connected via a joint, and a cooling pipe. A driving means for vertically moving one end of the first conduit in a vertical direction corresponding to the size of the shaped steel to be formed, and a cooling water supply means for supplying cooling water to the first conduit and the second conduit. The nozzle is formed into an elliptical shape, and its major axis is parallel to the first conduit and the second conduit, respectively.
Since it is attached to the second conduit, the same effect as the above (2) can be obtained.

[0051]

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a first embodiment of the present invention.

FIG. 2 is an injection pattern of the nozzle in FIG.

FIG. 3 is a diagram showing a surface temperature difference between a flange before cooling and a flange after cooling H-section steel according to the first embodiment.

FIG. 4 is a diagram showing a difference in surface temperature of a flange before and after cooling when H-section steel is cooled according to the first embodiment.

FIG. 5 is a perspective view schematically showing a second embodiment of the present invention.

FIG. 6 is a perspective view schematically showing a second embodiment of the present invention.

FIG. 7 is a diagram showing a surface temperature difference between a flange before cooling and a flange after cooling H-section steel according to the second embodiment.

FIG. 8 is a diagram showing a surface temperature difference between a flange before cooling and a flange after cooling H-section steel according to the second embodiment.

FIG. 9 is a perspective view schematically showing a third embodiment of the present invention.

FIG. 10 is an operation explanatory view of the third embodiment.

FIG. 11 is a diagram showing a water amount density distribution in a width direction of a flange according to a fourth embodiment of the present invention.

FIG. 12 is a diagram showing a surface temperature difference between a flange before cooling and a flange after cooling H-section steel according to a fourth embodiment.

FIG. 13 is a perspective view schematically showing a fifth embodiment of the present invention.

FIG. 14 is an explanatory view of the operation of the fifth embodiment.

[Explanation of symbols]

1 H section steel 2 Web 3 flange 4 Fillet part 5 transport lines 6 Transport rollers 10 Cooling device 11 Guide 12 openings 13 conduits 13a First conduit 13b Second conduit 14 nozzles 15 bearings 16 Drive 19 Flexible hose 20, 20a, 20b Cooling water buffer 21 Partition board 22 joints 25 Angle iron 26 Short side 27 Long side

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-57-165114 (JP, A) JP-A-2-295608 (JP, A) JP-A-5-123738 (JP, A) Actual development Sho-51- 114311 (JP, U) Actual development Sho 50-78716 (JP, U) Actual development Hei 7-3822 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 45/02 C21D 9 / 00

Claims (4)

(57) [Claims] 1. An apparatus for cooling a rolled shaped steel that is transported on a transportation line, comprising a plurality of nozzles, one end of which is rotatably supported at a height position near an upper surface of a transportation roller. And a drive means for rotating the conduit around the one end as a fulcrum corresponding to the size of the shaped steel to be cooled, and a cooling water supply means for supplying cooling water to the conduit. With high water density near the center of the direction
Is a cooling device for shaped steel. 2. An apparatus for cooling a rolled shaped steel that is carried on a carrying line, comprising: a first conduit having a plurality of nozzles; and a plurality of nozzles, one end of which is near an upper surface of a carrying roller. A second group of pipes supported at the height of the pipes, the other end of both pipes being connected via a joint, and the first pipe corresponding to the size of the shaped steel to be cooled. A driving means for vertically elevating one end of the pipe, and a cooling water supply means for supplying cooling water to the first conduit and the second conduit, and a length of a conduit group including the first and second conduits. A cooling device for shaped steel, characterized in that a nozzle having a high water density is arranged near the central part in the direction. 3. A rolled steel section which is conveyed on a conveyor line.
It is a device for cooling a roller, and has a plurality of nozzles and one end of which is located near the upper surface of the transport roller.
And a pipe rotatably supported in a fixed position, and the pipe corresponding to the size of the shaped steel to be cooled.
And a cooling water supply means for supplying cooling water to the conduit, wherein the plurality of nozzles are formed in an elliptical shape and the major axis thereof is the guide hole.
Characterized by being attached to the conduit so as to be parallel to the pipe
Cooling device that form steel. 4. Shaped steel after rolling which is conveyed on a conveyor line.
A first conduit having a plurality of nozzles and a plurality of nozzles.
One end is supported at a height near the top of the transport roller.
A second conduit, which is connected to the other end of both conduits.
Of the first conduits corresponding to the size of the shaped steel to be cooled.
Driving means for vertically moving the end vertically, and cooling water for supplying cooling water to the first conduit and the second conduit
A plurality of nozzles are formed in an elliptical shape and have a major axis of the first nozzle.
To be parallel to the first conduit and the second conduit respectively.
A cooling device for shaped steel, characterized in that it is attached to the first and second conduits .