JPS6344169Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a cooling control device in the width direction of a strip in a hot rolling facility, and more particularly to the device capable of quickly controlling the cooling temperature in the width direction of the strip.

2. Description of the Related Art Generally, hot rolling equipment is provided with a cooling device that cools the strip rolled during finish rolling with cooling water jetted from a cooling header. That is, as shown in FIG. 9, in a general hot rolling line, a slab heated to rolling temperature in a heating furnace 1 is rough rolled by a rough rolling mill group 2, and then rough rolled by a crop shear 3. Its front and rear ends are cut off. Further, it is finished rolled in a finishing mill group 4 to form a strip, cooled in a cooling header 5, and then wound around a coiler 6. As shown in FIG. 10, the cooling headers 5 are arranged in plural rows in the longitudinal direction of the hot run table 8 above and below the hot run table 8 that transports the strips 7 in the cooling zone. There is. Each header 5 is equipped with a large number of nozzles 9, and is configured to inject cooling water from these nozzles 9. In order to be able to cool the widest strip rolled in this hot rolling line, the nozzles 9 are arranged in correspondence with the widest strip width. Further, the spray range of the cooling water sprayed from each nozzle 9 onto the strip is set in advance. In such a cooling header 5, in addition to controlling the amount of water injected, each injection section consisting of a group of small headers in the strip passing direction is controlled to optimize the winding temperature of the strip 7 traveling at high speed to the coiler 6. I have to. However, in this cooling header 5, there is almost no cooling temperature control in the strip width direction, and as a result, the quality of the product may deteriorate. That is, at both ends in the width direction of the strip 7 running in the hot run 8, the temperature drops faster than in the center, so in order to improve the quality of the product, when cooling the strip 7, it is necessary to reduce the amount of cooling water in the width direction of the strip. It is necessary to control the cooling temperature in the width direction of the strip. Therefore, based on the above request, the present inventor devised a strip cooling control device for hot rolling equipment that can control the cooling temperature in the strip width direction, and filed an application (Utility Application No. 57-145798. (referred to as “first application”). The strip cooling control device for hot rolling equipment according to this prior application is designed to adjust the spray range of cooling water to the strip in the strip width direction, and to control the cooling area of the strip in the strip width direction. In a strip cooling device for hot rolling equipment in which cooling water nozzles are arranged in the strip width direction above a strip passage section, the nozzles are located at intermediate positions between the nozzles and the strip passage section, facing each other across the strip passage center line. The present invention includes a movable plate that is movable in the width direction of the strip and changes the direction of cooling water flowing down, and a movable plate moving mechanism that moves the movable plates toward and away from each other.

[Problem that the invention attempts to solve]

However, since the moving speed of the movable plate as mentioned above is slow at 20 to 30 mm/sec, it is difficult to move at a speed that can respond to the feedback signal from the thermometer that measures the strip temperature distribution installed at the exit side of the cooling zone. (approximately 200 mm/sec), and there was a problem that quick control was not possible.

[Purpose of invention]

This invention was made in view of the above-mentioned conventional problems, and provides a strip widthwise cooling control device for hot rolling equipment that can quickly control the widthwise direction of cooling water from a nozzle. The purpose is to

[Means to solve the problem]

Strip cooling water injection nozzles are arranged in the strip width direction at least above and below the strip passage section, and are opposed to each other across the strip passage center line at an intermediate position between the nozzles and the strip passage section. A strip width direction cooling control device in a hot rolling facility comprising a movable movable plate for changing the outflow direction of cooling water, and a movable plate moving mechanism for moving the movable plates toward and away from each other, The above object is achieved by attaching the movable plate to the movable plate moving mechanism so as to be tiltable about an axis parallel to the traveling direction of the strip, and providing a drive device for tilting the movable plate. .

[Effect]

In this invention, the movable plate is rotated by the drive device, so that the cooling water strip can be quickly controlled in the width direction.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of the cooling control equipment of the present invention. Reference numeral 11 denotes a hot run table, which conveys the finish-rolled strip 7 to a coiler. Above the hot run table 11, a large number of cooling headers 12 ₁ , 12 ₂ . . . 12 _o are arranged at predetermined positions in the longitudinal direction of the line. A plurality of adjacent cooling headers (for example, 12 ₁ , 12 ₂ ) are grouped together to form a cooling section 10, so that on the top of the hot run table 11 there are provided a plurality of cooling headers, each consisting of a group of small headers. Section 10 is set. Each header 12 is provided with a large number of nozzles 13 in the width direction of the strip 7, so that cooling water can be sprayed onto the strip 7. Above the hot run table 11 at the lower position of each of the cooling sections 10 formed by the plurality of cooling headers 12, as shown in FIG. The plates 14 and 15 are arranged facing each other. Each movable plate 14, 15 has a carriage 16, 17, respectively.
The strips are attached to the lower side of the strips 7 so as to be tiltable via rotating shafts 14A and 15A parallel to the direction of movement of the strip 7, and move toward each other on the rail 20 (in the direction of arrow A in FIG. 2) and It is possible to move synchronously in the direction of separation (in the direction of arrow B). This moving mechanism will be explained next. As shown in FIG. 2, both toes 22 of a looped chain 21 are connected to the truck 16. Further, an intermediate portion 23 on the other side of the loop of the chain 21 is connected to the truck 17. chain 2
The toe 22 side of the loop 1 is not connected to the truck 17. That is, as shown in FIG. 3, which is a cross-sectional view taken along the line of FIG. 24 is freely pushed through. Reference numeral 25 in FIG. 3 is the rail 20
The frame supporting the is shown. As shown in FIGS. 2, 5, and 4, which is a sectional view taken along the line 2--, chains 26 and 2 with attachments are connected to the carts 16 and 17, respectively.
7 are provided facing each other, and a sprocket 28 is pivotally supported on a frame 25 and is disposed between both chains 26 and 27 with attachments. chain 21
When the chain toe 22 rotates, the chain end 22 moves forward or backward, the middle chain 23 moves forward or backward, and the chains 26, 27 with attachments and the sprocket 28 cause the carts 16, 17 to move smoothly toward and away from each other. conduct. As shown in FIG. 2, the chain 21 connects to sprocket wheels 33 and 34 via a guide wheel 32.
It is wrapped. The sprocket wheel 33 is connected to a cylinder device 39 via a shaft 35, a sprocket wheel 36, and a chain 37, as shown in FIG. The tip of the piston rod 38 of the cylinder device 39 is connected to the middle of the chain 37, and when the rod 38 is moved in and out, the chain 37 is driven to rotate. This power drives the shaft 35 and chain 37 to rotate. This power is transmitted to the carts 16, 17 via the shaft 35, chain 21, etc.
17 to approach or move away. By changing the amount of protrusion and retraction of the piston rod 38, the carriages 16, 17 and the carriage 16,
The movable plates 14 and 15 attached to 17 can be moved freely. And piston rod 3
By stopping the movable plates 14 and 15, the movable plates 14 and 15 can be moored and stopped at arbitrary positions. As shown in FIG. 2, the lower portions of the movable plates 14 and 15 are inclined toward the outside of the width of the rolling apparatus.
Therefore, the cooling water injected from the nozzle 13 located above the movable plates 14, 15 is cut off by the movable plates 14, 15 and flows down to the side of the strip 7. In this way, the amount of cooling water injected to the strip 7 can be controlled in the width direction of the strip 7.
It is possible to control the cooling temperature in the width direction. Next, referring to FIGS. 6 and 7, the movable plate 14
The following describes a device for rapidly driving a motor. The description of the movable plate 15 opposing this movable plate 14 will be replaced with the description of this movable plate 14. The movable plate 14 is fixedly attached to the rotating shaft 14A, and the rotating shaft 14A is rotatably supported by a plurality of bearings 40 on the lower surface of the truck 16 in parallel to the direction of movement of the strip 7. has been done. That is, the movable plate 14 can be tilted in the width direction of the strip 7. In addition, at the center of the rotating shaft 14A, the trolley 16 is provided.
A rotary receiving plate 41 that projects upward through a through hole 16A formed at the bottom of the housing is integrally attached. A cylinder mount 43 is supported on the truck 16 so as to be able to swing within a certain range with a trunnion shaft 42A parallel to the rotating shaft 14A and a trunnion bearing 42B, and the tip of the cylinder rod 43A of the cylinder device 43 is It is rotatably connected to a pedestal 41A that is welded to the rotary receiving plate 41. The positional relationship between the cylinder device 43 and the rotating plate 14 is such that the rotating plate 14 is swung clockwise in FIG. 6 when the cylinder rod 43A of the cylinder device 43 protrudes. Here, since the cylinder device 43 only needs to tilt the movable plate 14, compared to the cylinder device 39 for driving the carts 16 and 17,
The piston movement speed can be increased. FIG. 8 is a block diagram showing a drive control system for the movable plates 14 and 15. In FIG. 8, a pair of left and right movable plates 14, 15 (hereinafter collectively referred to as 44) in each cooling section 10 formed in the line longitudinal direction of the hot run table 11 is shown.
44-A1 and 44B ₁ , 44-A ₂ and 44-
B ₂ ...Displayed as 44-A _o and 44-B _o . The controller (CPU) 52 is the hot run table 1
The detected value of the temperature detector 53 that enables non-contact detection of the temperature distribution in the width direction of the strip 7 introduced into the strip 1 and the strip width 54 of the strip 7 measured in advance
is taken as input. The controller 52 also determines the cooling section in which the cooling water injection range should be restricted in the width direction by the movable plate 44, and controls the driving of the cylinder devices 39 and 43 connected to the movable plate 44. It is configured. Further, on the exit side of the hot run table 11, a temperature detector 55 is arranged which can detect the temperature of the cooled strip 7 in a non-contact manner. The controller 52 inputs the detected value of the temperature detector 55, and is capable of feedback controlling the determination of the cooling section in which the cooling water injection range for the strip 7 is to be limited in the strip width direction. An example of control is as follows. Controller 5
Step 2 determines the cooling section in which the cooling water injection range for the strip 7 should be limited in the strip width direction based on the temperature distribution in the width direction of the strip 7 detected by the temperature detector 53 and the strip width 54. The movable plate 44 is moved back and forth in the width direction of the strip 7 by a cylinder device 39 operated based on a command from the controller 52, and then remains at a predetermined position.
For example, if the detected value of the temperature detector 53 indicates that the temperature at both ends of the strip 7 in the width direction is low, the movable plate 44 of a predetermined number of cooling sections operates the cylinder 39 according to the temperature. It is moved toward the center of the strip 7 and stopped there. As a result, the amount of cooling water injected to both ends in the width direction is reduced, and the temperature at both ends in the width direction is increased to the set value. Conversely, when the outlet thermometer 55 detects that the temperature at both ends has become too high, the output of the outlet thermometer 55 is fed back to the controller 52, and the movable plate is moved to open according to the temperature difference. At the same time, feedback control is performed so that the movable plate of that (or those) sections is quickly tilted in the separating direction by the cylinder device 43. As a result, the amount of cooling water injected to both ends of the strip in the width direction increases, and the temperature at both ends is quickly lowered to the set value. That is, since it is sufficient for the cylinder device 43 to tilt only the movable plate 14, the cylinder rod 43A
By selecting a large operating speed, the displacement speed of the tip of the movable plate 14 becomes large, and the amount of cooling water injected to both ends of the strip in the width direction can be rapidly increased. Furthermore, in this embodiment, the distance from the rotating shaft 14A to the tip of the cylinder rod 43A is approximately 1/3 of the distance from the tip of the movable plate 14 to the rotating shaft 14A. The operating speed of 43A is approximately tripled and transmitted to the tip of the movable plate 14. Furthermore, in addition to the above, in response to a command from the controller 52, the cylinder device 39 moves the carts 16, 17 in the direction of separation, and the cylinder device 43 tilts the movable plates 14, 15 so that their tips are separated. The tilting speed of the tips of the movable plates 14, 15 is added to the moving speed of the carriages 16, 17, and the tips of the movable plates 14, 15 are rapidly displaced in the strip width direction. When moving the movable plates 14 and 15 in the direction toward each other, this can be done quickly in the same way as described above.

[Effect of the idea]

Since the present invention is constructed as described above, it is possible to reliably limit the cooling water injection range to the strip in the strip width direction and control the cooling rate in the strip width direction. Since this can be carried out quickly, overcooling or insufficient cooling of both ends can be reliably prevented, and the product quality based on the strip cooling process can be improved, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the strip width direction cooling control device in a hot rolling facility according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIGS. 3 and 4 are FIG. 5 is an enlarged sectional view taken along the - line and - line in FIG. 2, FIG. 5 is a schematic front view showing the trolley moving mechanism in the same embodiment, and FIG. 7 is a sectional view taken along the - line in FIG. 6, FIG. 8 is a block diagram showing the control mechanism of the same embodiment, and FIG. 9 is a layout diagram showing a general hot rolling line. FIG. 10 is a front view showing the main parts of a conventional strip cooling device. 7... Strip, 11... Hot run table, 12... Cooling header, 14, 15... Movable plate, 14A, 15A... Rotating shaft, 43... Cylinder device (drive device).

Claims (1)

[Scope of utility model registration request] Strip cooling water injection nozzles are arranged in the strip width direction at least above and below the strip passage section, and are opposed to each other across the strip passage center line at an intermediate position between the nozzles and the strip passage section. A strip width direction cooling control device in a hot rolling facility, comprising a movable plate for changing the outflow direction of cooling water, and a movable plate moving mechanism for moving the movable plates toward and away from each other, A strip in hot rolling equipment, characterized in that the movable plate is attached to the movable plate moving mechanism so as to be tiltable about an axis parallel to the traveling direction of the strip, and a drive device for tilting the movable plate is provided. Width direction cooling control device.