JPH0444250Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The invention is based on the method of spraying cooling water onto the surface of thick plates and hot strip steel plates after rolling them.
The present invention relates to a steel plate cooling device that can cool the steel plate.

"Prior Art" An example of the structure of a conventional cooling device of this type is shown in FIGS. 4 and 5.

In the figure, W is a steel plate to be cooled, which moves in the direction of the arrow in the figure. The cooling device is provided above such a steel plate W, and includes a header 1 extending in the width direction of the steel plate W, and a plurality of pipe laminas 2 connected to the header 1 at predetermined intervals in the length direction.
... and a movable gutter 3 that is provided below the tip opening of the pipe laminar 2 located at both left and right ends of the pipe laminars 2 and is movable in the width direction of the steel plate W, and supplies the header 1 with the movable gutter 3. The steel plate W is appropriately cooled by spraying the cooled water onto the steel plate W through the pipe lamina 2 .

The movable gutter 3 is adjusted to move according to the width of the steel plate W to be cooled, and receives and collects cooling water supplied from the pipe lamina 2 that protrudes to the left and right beyond the width of the steel plate W.

``Problems to be solved by the invention'' By the way, the above-mentioned cooling device had the following problem.

Move the movable gutter 3 according to the width dimension of the steel plate,
This movable gutter 3 receives and collects excess water that is not sprayed onto the steel plate W, and a constant amount of cooling water is always required even when the width of the steel plate W to be cooled differs.

When cooling a wide steel plate W, 2 in Fig. 4
As shown by the dotted chain line, the movable gutter 3 protrudes to the left and right to a greater extent than the main body of the apparatus, which increases the area of the equipment and is also unfavorable from a safety point of view.

When stopping the cooling device, it is done by operating a valve attached to the water supply pipe connected to the header 1, but the valve operation itself takes time (for example, 3 to 10 seconds), and Since the water remaining in the pipe laminar 2 and header 1 flows out little by little, it takes a long time (for example, 5 to 20 minutes) to completely stop.

The drive mechanism (not shown) for moving the movable gutter 3 is easily splashed with cooling water, making it difficult to maintain good durability of the drive mechanism.

The number of pipe laminas 2 that can be arranged is limited because they interfere with each other, and for this reason, the cooling capacity of the device cannot be set very high.

The present invention can solve these conventional problems.

"Means for Solving the Problems" The cooling device of the present invention includes a slit nozzle provided above a steel plate at a predetermined interval so that the longitudinal direction of the opening substantially coincides with the width direction of the steel plate, and the slit nozzle. a cooling water supply means for supplying cooling water to the slit nozzle; A movable block that can be respectively closed; a movable block drive mechanism that changes the substantial aperture length of the slit nozzle by moving the movable blocks individually to close the open end of the slit nozzle; It is characterized by being equipped with a shutter that closes when closed.

``Operation'' In the cooling device of the present invention, by moving the moving blocks individually by their drive mechanism, each of the moving blocks can close a predetermined portion of the slit nozzle. Therefore, by moving a predetermined moving block located at the end of the slit nozzle according to the width dimension of the steel plate to be cooled, the opening end of the slit nozzle can be closed by the required length. , the substantial opening length of the slit nozzle can be changed freely. In addition, by operating the shutter, the slit nozzle opening can be instantaneously opened and closed over its entire length, so by keeping the shutter closed and storing cooling water in the slit nozzle when the device starts operating, the shutter can be opened at the same time. Cooling can be started quickly, and when the operation is stopped, the supply of cooling water can be quickly stopped simply by closing the shutter.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

Reference numeral 11 in the figure indicates a header, and this header 11
is provided at a position a predetermined distance away from the upper surface of the steel plate W to be cooled, so as to extend parallel to the steel plate W and in the width direction of the steel plate W. Further, the length of the header 11 is set to be slightly longer than the width of the maximum width steel plate W to be cooled. Inside the header 11, a water supply pipe 13 having overflow nozzles 12 at predetermined intervals in the length direction is disposed in the upper part. The reason why such a special water supply pipe 13 is used is to uniformly supply cooling water into the header 11 in the length direction.

A slit nozzle 14 is provided at the lower part of the header 11 so that it extends downward, and the longitudinal direction of the opening 14a substantially coincides with the longitudinal direction of the header 11.
In other words, it is provided so as to substantially coincide with the width direction of the steel plate W. Length l of slit nozzle 14
is set according to the maximum width of the steel plates W to be cooled. Note that the header 11
The water supply pipe 13 constitutes a cooling water supply means for supplying cooling water to the slit nozzle 14.

On both sides of the side plate 14b constituting the slit nozzle 14 (only one side is shown in the figure), there are U-shaped storage covers 15 that cover the opening of the side plate 1.
4b, and inside this storage cover 15 are a plurality of (six in the illustrated example) moving blocks 16.
are provided continuously from the ends to the center.

The moving block 16 has a width _l1 of about 50 to 200 mm and a length _l2 longer than the width _l3 of the slit nozzle opening 14a, and is guided by the block storage cover 15. 2, each of which is movable individually in directions A and B in FIG. When these moving blocks 16 are moved in the direction of arrow A, the side plate 14
It protrudes into the slit nozzle 14 from the opening 14c of the slit nozzle 14 (see FIG. 3), and the opening portion of the slit nozzle 14 corresponding to the width _l1 of the protruded moving block 16 is closed.

A rod 17 is fixed from the back side of the moving block 16, and the tip of the rod 17 protrudes from a hole in the storage cover 15 to the outside. A metal bellows 18 is interposed between the rod 17 and the storage cover 15, and this bellows 18 seals the portion of the rod 17 that passes through the storage cover, and the elastic action of the bellows 18 allows the moving block 1 to be closed.
6 is biased in the B direction.

A common cam shaft 19 is rotatably disposed at the tip of each rod 17, and a cam portion 19a is formed at a portion of the cam shaft 19 facing each rod 17. The cam shaft 19 having the cam portions 19a at appropriate intervals in the length direction is made by connecting in the length direction a common member in which outwardly projecting cam portions are formed with different mounting angles at predetermined angles. When the rod 1 is sequentially moved by a predetermined angle from the initial position, the moving blocks 16 arranged from the left end to the center in FIG.
7, the structure is such that the closed state shown in FIG. 3 is brought to the closed state in order from the end side.

Reference numeral 20 in Fig. 1 denotes a drive mechanism for rotating the camshaft 19 by a predetermined angle, and an electric motor, a hydraulic motor, or the like is used. The rod 17, the camshaft 19, and the drive mechanism 20 constitute a moving block drive mechanism for moving the moving blocks 16 individually.
1 is provided outside the slit nozzle 14,
This is a shaft support member which rotatably supports the camshaft 19, and a drain pipe 22 having a valve 22a is connected to this member as required.

Further, at the bottom of the slit nozzle 14, there is a shutter 2 that can close the nozzle opening 14a over the entire surface.
3 connects the side plate 1 of the slit nozzle 14 via the shaft 24.
It is rotatably supported by 4d. An arm 25 is integrally provided on the shaft 24 so as to extend to the opposite side of the slit nozzle 14, and when this arm 25 is operated by a cylinder 26 supported by the header 11, the shutter 23 is moved through the shaft 24. is rotated.

Hereinafter, the operation of the cooling device having the above configuration will be explained.

For example, when cooling a steel plate W with the maximum width,
First, the drive mechanism 20 rotates the camshaft 19 to prevent each moving block 16 from protruding into the slit nozzle 14, that is, the open state, and the cylinder 26 is operated to close the shutter 23. In this state, cooling water is supplied from the water supply pipe 13, and the cooling water is stored in the header 11 and the slit nozzle 14. After a certain amount of cooling water is stored in the header 11 and the slit nozzle 14 in this way, the shutter 23 is opened. Then,
As mentioned above, all of the moving blocks 16 arranged at both ends are in the open state, and the entire surface of the opening 14a of the slit nozzle works effectively, allowing the wide steel plate W to be cooled in a substantially steady state from the beginning. I can do it.

On the other hand, when cooling a steel plate W smaller than the maximum width, the drive mechanism 20 is driven according to the width of the steel plate W to rotate the camshaft 19, and a plurality of Of the moving blocks 16, a necessary number of moving blocks 16 located on the end side are closed as shown in FIG. 3, thereby making the actual length of the slit nozzle 14 correspond to the width of the steel plate W. In this state, by supplying cooling water to the water supply pipe 13 and opening the shutter 23, desired cooling can be achieved.

In addition, when stopping the cooling device, header 1
At the same time, the water supply to the cylinder 26 is stopped.
This can be done instantly by closing the shutter 23 with the operation.

"Modified Example" In the above embodiment, the cam portions 19a are formed on each of the common cam shafts 19, and each moving block 16 can be moved by operating only the one cam shaft 19. However, a camshaft may be provided for each moving block 16, and the camshafts may be moved by individual drive mechanisms.

Further, in the above embodiment, the camshaft 19 is directly rotated by the drive mechanism 20 provided on one side of the slit nozzle 14. The two camshafts may be configured to rotate simultaneously.

Further, in the above embodiment, the end portion of the slit nozzle 14 can be closed and opened by sliding the moving block 16 in the directions A and B in FIG. The end portion of the slit nozzle 14 may be opened and closed by supporting the movable block 16 in a swingable manner and rotating the movable block 16 by a predetermined angle.

Furthermore, in the above embodiment, the moving blocks 16 are arranged at both left and right ends of the slit nozzle 14, but
The moving block 16 may be arranged only on one side.

"Effect of ideas" According to the present invention, the following excellent effects are achieved.

By moving the moving block at the end according to the width dimension of the steel plate, the end of the slit nozzle can be closed to the required length, and therefore the actual opening length of the slit nozzle can be changed freely. This makes it possible to supply cooling water only to where it is needed. Therefore, compared to the conventional structure in which excess water is received and collected by a moving gutter, the amount of cooling water can be reduced in accordance with the width of the steel plate. Further, since the opening length of the slit nozzle is changed according to the width of the steel plate as described above, the width of the cooling water can be finely adjusted, and overcooling of the end of the steel plate can be prevented.

Even when cooling the widest steel plate,
A member such as a movable gutter does not protrude greatly in the left-right direction of the device, and the equipment area can be reduced accordingly, which is also preferable from the standpoint of safety.

Since a shutter is provided to close the entire opening of the slit nozzle, even if the actual opening length of the slit nozzle is changed using a moving block, the shutter can be opened and closed easily at the start of operation or during operation. The time required for supplying cooling water and stopping the system can be significantly reduced.

Even when a drive device for operating the moving block is disposed outside the slit nozzle, there is no risk of cooling water splashing onto the drive device, which is advantageous in terms of increasing the durability of the drive device.

The structure uses a slit nozzle with a single opening to spray cooling water onto the steel plate, and since the amount of cooling water can be increased arbitrarily, it can be arbitrarily set to have a high cooling capacity.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, FIG. 1 is a vertical side view of the device, and FIG. 2 is a side view of the device shown in FIG.
3 is a diagram for explaining the operation of the moving block, FIG. 4 is a plan view showing a conventional example, and FIG. 5 is a sectional view taken along the line - in FIG. 4. 11... Header, 13... Water supply pipe, 14... Slit nozzle, 16... Moving block, 19...
Cam shaft, 19a... cam portion, 20... drive mechanism,
23...Shutter, 26...Cylinder.

Claims (1)

[Scope of utility model registration request] In a steel plate cooling device that cools a steel plate by spraying cooling water onto the surface of a continuously moving steel plate, the openings are spaced at a predetermined distance above the steel plate and the longitudinal direction of the openings is aligned with the width direction of the steel plate. slit nozzles provided to substantially coincide with each other; a cooling water supply means for supplying cooling water to the slit nozzles;
A moving block is provided continuously from the end to the center at both left and right ends of the slit nozzle or at either end, and each of the moving blocks is movable individually to respectively close a predetermined opening location of the slit nozzle; A moving block drive mechanism that changes the substantial opening length of the slit nozzle by moving each block individually to close the opening end of the slit nozzle, and a shutter that closes the entire opening of the slit nozzle. A cooling device for steel plates.