JPS6235523Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present 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 controlling the cooling temperature in the width direction of the strip.

Usually, hot rolling equipment is provided with a cooling device that cools the rolled strip during finish rolling with cooling water spouted from a cooling header. FIG. 1 is a diagram showing a general hot rolling line, in which a slab heated to a rolling temperature in a heating furnace 1 is rolled by a rough rolling mill group 2, and then a crop shear 3 is used to roll the front and rear ends of the slab. is cut off. Further, it is rolled into a strip in a finishing mill group 4, cooled in a cooling header 5, and then wound around a coiler 6. Here, as shown in FIG. 2, the cooling header 5 is connected to the upper and lower parts of the hot run table 8 which conveys the strip 7 in the cooling zone.
are arranged in the longitudinal direction. 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 to be rolled in this hot rolling line, the nozzles 9 are arranged at 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 temperature at which the strip 7 traveling at high speed is wound into 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-to-file). 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 a hot rolling facility, in which nozzles for injecting cooling water are arranged in the strip width direction above a strip passage part, the strip cooling device is provided at an intermediate position between the nozzles and the strip passage part, with the strip passage center line interposed therebetween. The movable plate includes facing movable plates movable in the width direction of the strip for changing the direction of cooling water flowing down, and a movable plate moving mechanism for moving the movable plates toward and away from each other.

An object of the present invention is to provide an apparatus that can more easily control the cooling temperature in the width direction even for a wide strip by improving the invention related to the earlier application. That is, in the above-mentioned prior application, when the movable plates are moved greatly in the direction away from each other, the lower ends of the movable plates hit a member such as the laminar flow frame, and cannot be moved further in the direction away from each other, resulting in the maximum strip being removed. There is a possibility that it will be difficult to respond sufficiently to the width.

In the present invention, a tilting plate is tiltably attached to the lower end of the movable plate, and means is provided for biasing the tilting plate in the direction of separating the movable plate.

The present invention will be described in more detail below with reference to embodiments shown in the drawings.

FIGS. 3 and 4 are explanatory diagrams showing one embodiment of the cooling control equipment of the present invention. 11 is a hot run table, and the strip 7 which has been finished rolled is
is transported to the coiler. At the top of this hot run table 11 are a number of cooling headers 12, 12'.
...12n are arranged at predetermined positions in the longitudinal direction of the line. A plurality of adjacent cooling headers (for example, 12, 12') are grouped together to form a cooling section 10, and therefore, on the top of the hot run table 11, a plurality of sets of cooling sections each consisting of a group of small headers are arranged. 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. A pair of left and right movable plates 14 and 15 as blocking means are disposed on both sides of the hot run table 11 at a position below each of the cooling sections 10 formed by the plurality of cooling headers 12, with the strip passing center line C in between. , are facing each other. Each movable plate 14, 15 is attached to the lower side of the trolley 16, 17, respectively,
They can move synchronously on the rail 20 in the direction toward each other (in the direction of arrow A in FIG. 4) and in the direction away from each other (in the direction of arrow B in FIG. 4). This moving mechanism will be explained next. As shown in FIG. 4, the trolley 16 includes:
Both ends 22 of the looped chain 21 are connected. Further, the other side midway 23 of the chain 21 is connected to the truck 17. chain 2
The toe 22 side of 1 is not connected to the trolley 17. That is, as shown in FIG. 5, which is a cross-sectional view taken along the line of FIG. is inserted into.
Reference numeral 25 in FIG. 5 is a pedestal for supporting the rail 20. In addition, as shown in FIG. 4, FIG. 7, and FIG. 6, which is a sectional view taken along the line of FIG.
From each chain 26 with attachment,
27 are provided facing each other, and a sprocket 28 is pivotally supported on the frame 25 and is disposed between the chains 26 and 27 with attachments. chain 2
1 rotates, the chain toe 22 moves forward or backward, the middle chain 23 moves backward or forward, and the chains 26, 27 with attachments and the sprocket 28 cause the carts 16, 17 to move smoothly towards and away from each other in synchronized movement. Do the following. As shown in FIG. 4, the chain 21 is suspended from sprocket wheels 33 and 34 via a guide wheel 32. 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 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 movable plates 14, 15 attached to the carriages 16, 17 can be freely moved. Furthermore, by stopping the piston rod 38, these movable plates 14, 15 can be moored and stopped at arbitrary positions. Movable plate 14,1
As shown in FIG. 4, the lower portion of the roll 5 is inclined in the direction outside the width of the rolling apparatus. Therefore, the nozzle 13 located above the movable plates 14 and 15
The cooling water injected from the strip is cut off by the movable plates 14 and 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, and the cooling temperature can be controlled in the width direction of the strip 7.

Therefore, the tilting plate 6 is located at the lower end of the movable plates 14 and 15.
4 and 65 are attached so as to be tiltable, and are biased in the direction of separating the movable plates.

The configurations of the lower end portion of the movable plate 14 and the tilting plate 64 will be described below. In addition, the movable plate 15 and the tilting plate 65
has a similar configuration.

As shown in FIGS. 8 and 9, the tilting plate 64 is attached to the lower end of the movable plate 14 by a pin 66 and is swingable. Further, a tension spring 68 is stretched between a portion near the tip of the tilting plate and a portion slightly above the lower end of the movable plate 14.
is constantly biased in the direction of arrow Θ. A stopper 70 is attached to the movable plate 14 and defines the upper limit position of the tilting plate 64. The solid line in FIG. 8 shows a state in which the tilting plate 64 is at the upper limit position. When the tip of this tilting plate 64 hits a member such as a pedestal, it rotates in the anti-Θ direction as shown by the two-dot chain line in FIG.

FIG. 10 is a schematic diagram showing the operation of the tilting plates 64, 65. Tilting plates 64 and 65 are provided at the lower ends of each movable plate 14 and 15, respectively. When the movable plates 14 and 15 move in the direction of separation, the tips of the tilting plates 64 and 65 eventually come into contact with the existing header frame 80. Furthermore, movable plates 14, 15
When they move in the direction away from each other, the tilting plates 64 and 65 also rotate as shown by dotted lines in the figure. This makes it possible to move the movable plates 14 and 15 in the direction of separation (toward the outside of the strip width) even for the strip 7 having a large width W. In this way, the amount of cooling water in the strip width direction can be appropriately changed regardless of the strip width, so that the cooling temperature can be accurately controlled.

FIG. 11 is a diagram showing biasing means for a tilting plate according to a different embodiment. In this embodiment, the tilting plate 6
A counterweight 72 is attached to 4, and the weight of this counterweight 72 biases the tilting plate 64 in the direction of the arrow Θ.

It is clear that the biasing means for the tilting plate may be other than those shown in FIGS. 8 to 11.

FIG. 12 is a block diagram showing a drive control system for the movable plates 14 and 15. In FIG. 12, 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 are 44-A1 and 44B ₁ , 44. -A ₂ and 4
4-B ₂ ...Displayed as 44-An, 44-Bn. A controller (CPU) 52 inputs the detection value of a temperature detector 53 that enables non-contact detection of the temperature distribution in the width direction of the strip 7 introduced into the hot run table 11 and the strip width 54 of the strip 7 measured in advance. It is said that And this controller 52
The movable plate 44 is configured to determine the cooling section in which the cooling water injection range should be limited in the width direction, and to drive and control the cylinder device 39 connected to the movable plate 44. Further, on the exit side of the hot run table 11, a temperature detector 55 is installed which can detect the temperature of the cooled strip 7 without contact. 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. 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 controller 52 determines the cooling section in which the cooling water injection range for the strip 7 should be limited in the strip width direction. do. 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 plate 44 with a predetermined number of cooling sections will be connected to the cylinder 39 depending on the temperature.
By the operation of , it is moved to the center side 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. On the other hand, outlet thermometer 5
5, when it is detected 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 a cooling section is selected to open and move the movable plate according to the temperature difference. , performs feedback control to move the movable plate of that (or those) sections in the separating direction. As a result, the amount of cooling water injected to both ends in the width direction of the strip is increased, and the temperature at both ends is lowered to the set value.

As detailed above, according to the present invention, the range of cooling water sprayed onto the strip is reliably limited in the strip width direction, and the cooling rate in the strip width direction can be controlled. Therefore, overcooling or insufficient cooling of both ends can be prevented, and product quality based on the strip cooling process can be improved. In addition, in the case of newly installed equipment, there is an effect that there is no need to make the roller body length of the hot run table longer than necessary. Furthermore, the present invention can be easily applied to existing hot-transfer cooling equipment.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram of a hot rolling line, Fig. 2 is a front view of main parts of a conventional strip cooling device, Fig. 3 is a side view of a strip cooling device according to an embodiment of the present invention, and Fig. 4 is a Figure 3 - Sectional view along the line, No. 5
The figure is a sectional view along the line of Fig. 4, and Fig. 6 is a cross-sectional view along the line of Fig. 4.
7 is a partially enlarged view of the trolley moving mechanism, FIGS. 8 and 11 are configuration diagrams showing the tilting mechanism of the tilting plate, FIG. 9 is a left side view of FIG. 8, Figure 10 is a schematic diagram showing the operation of the tilting plate;
FIG. 2 is a control block diagram of the embodiment device. 7... Strip, 12, 12',...12n
... Cooling header, 13 ... Nozzle, 14, 15,
44...Movable plate, 16,17...Dolly, 21,3
7... Chain, 35... Shaft, 39... Cylinder device, 64, 65... Tilting plate.

Claims (1)

[Claims for Utility Model Registration] In a strip cooling device for hot rolling equipment, in which strip cooling water injection nozzles are arranged in the strip width direction above the strip passage section, the strip cooling water injection nozzles are arranged at intermediate positions between the nozzles and the strip passage section. A movable plate for changing the direction of flow of cooling water that is movable in the width direction of the strip and facing each other across the strip passage center line; a movable plate moving mechanism that moves the movable plates toward and away from each other; a tilting plate that is inclined in the widthwise outward direction and is attached to the lower end of the movable plate so that the strip widthwise end can be tilted in the widthwise inward direction when the strip comes into contact with a member; A strip cooling device for hot rolling equipment, comprising: means for biasing the tilting plate in the direction of separating the movable plate.