JPH08132122A - Water breaking equipment of hot rolling line - Google Patents

Abstract

PURPOSE: To efficiently break water with low water pressure by fitting a jet nozzle fixing protector which is installed on the outlet side of a hot rolling line cooling equipment and used for the water for breaking the water on the steel sheet to be carried to a fixed frame provided on the upper part of the carrying roller, and oscillating the pass line in parallel using a link mechanism. CONSTITUTION: A water breaking equipment 6 consisting of a header 6a and a nozzle 6b is fitted to a frame 17 on a protector 11 at the prescribed angle θ, and is fitted to a fixed frame 14 through a parallel link mechanism 20 in an oscillating manner. The fixed frame 14 is arranged in parallel to the advancing direction (as indicated by the arrow) of the steel sheet, i.e., the pass line PL, and one end of two link arms 23, 44 of the same length is rotatably fitted to pins 21, 22 provided on the fixed frame 14 with the prescribed intervals L. On the other hand, the other end of the link arms 23, 24 is rotatably fitted to pins 25, 26 provided on the protector 11 with the intervals L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a draining device for a hot rolling line.

[0002]

2. Description of the Related Art Generally, in a hot rolling line, as illustrated in FIG. 3, a steel plate 1 rolled by a finishing tandem rolling mill 2 is cooled by a steel plate cooling device 3 on a hot run table and then wound by a coiler 4. However, the temperature of the steel sheet surface is measured by the thermometer 5 in order to determine the cooling effect of the steel sheet cooling device 3.

On the outlet side of the steel plate cooling device 3, when the cooling water becomes water and stays on the steel plate 1, an error may occur in the measurement by the thermometer 5 or the mechanical properties due to local supercooling. In order to cause a problem such as alteration of the steel sheet, it is common to remove the riding water by the water draining device 6 attached to the outlet side of the steel plate cooling device 3. As shown in FIG. 4, this drainer 6 is constructed by attaching a plurality of nozzles 6b to a header 6a, and draining water 7 sprayed from the nozzles 6b at a predetermined angle .theta. Ride water 9 is removed.

However, such a water draining device 6 is used for the steel plate 1
Since it is provided directly above, the warp tip 1a of the steel plate 1
As shown in FIGS. 6 and 7, there is a risk of damage due to collision (see FIG. 5 (a)) or contact between the bulge 1b (see FIG. 5 (b)) in the middle. Preventive measures have been taken. That is, first, referring to FIG. 6, the drainer 6 is attached to the protector 11,
The protector 11 includes a fixed frame 14 disposed above the transport roller 8 via link arms 12 and 13 which can extend and contract.
The link mechanism 10 is supported at one point on the fulcrum 14a. Thereby, with respect to the warp tip 1a of the steel plate 1,
As shown in FIG. 8 (a), it can be retracted upward in advance, and when it contacts the bulge 1b, it can be escaped in the traveling direction around the fulcrum 14a.

In the case of FIG. 7, the protector 11 to which the water draining device 6 is attached is tiltably supported by a swing arm 15 supported by a fulcrum 14a of a fixed frame 14 at one point, and an end 11a of the protector 11 is raised and lowered. The cylinder 16 is configured to be able to move up and down. So, protector 11 is a fulcrum
The draining device 6 can be retracted with respect to the warp tip 1a and the bulge 1b of the steel plate 1 by rotating in the traveling direction around the center 14a and moving up and down.

[0006]

However, the above-mentioned conventional drainer has the following problems. First, in the case of the link mechanism method of FIG. 6, the nozzle 6b keeps a predetermined angle with respect to the steel plate 1 when the water draining device 6 is lifted in the traveling direction by an external force such as the bulge 1b of the steel plate 1. However, since it takes several seconds to return to the normal angle θ, there is a problem that a predetermined draining action cannot be performed during that time. There is also a problem that the water pressure at that time must be higher than the pressure required at a predetermined angle. Further, in the worst case, as shown in FIG. 8 (b), the nozzle 6b may face directly downward, and the steel plate 1 may be watered.

Further, in the case of retracting in the swing arm system of FIG. 7, the state shown in FIG. 8 (c) occurs and the nozzle 6b cannot be held at a predetermined angle θ with respect to the steel plate 1. There are similar problems as in the case of the link mechanism method. The same applies to the case where the water draining device 6 is lifted by the steel plate 1 in the traveling direction by an external force.

It is an object of the present invention to provide a water draining device for a hot rolling line that solves the above problems of the prior art.

[0009]

DISCLOSURE OF THE INVENTION According to the present invention, draining water for removing riding water on a steel plate which is mounted on the exit side of a steel plate cooling device of a hot rolling line and which is carried by a carrying roller is jetted at a predetermined angle. A draining device having a nozzle fixed to a protector, wherein the protector is movably supported by a fixed frame provided parallel to the pass line above the transport roller via a parallel link mechanism. Is a draining device for a hot rolling line.

[0010]

[Operation] According to the present invention, since the protector having the nozzle fixed at a predetermined angle is movably supported by the parallel link mechanism, the protector can be held parallel to the pass line. The nozzle for spraying the drainage water can always be kept at a predetermined angle with respect to the steel plate.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is an explanatory view of its operation. In the drawings, the same members as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 1, a protector 11 has a water draining device 6 including a header 6a and a nozzle 6b fixed to a pedestal 17 at a predetermined angle θ (water draining angle), and the protector 11 can be tilted by a parallel link mechanism 20. Supported by.

Here, the fixed frame 14 is arranged parallel to the traveling direction of the steel plate 1, that is, the pass line PL, and the fixed frame 14 is provided at a predetermined interval L.
Two pins 21, 22 of the same length link arms 23, 24
One end of is attached rotatably. Meanwhile, the link arm
The other ends of 23 and 24 are rotatably attached to the protector 11 by pins 25 and 26 provided at an interval L.

The operation of the water draining device thus constructed will be described with reference to FIG. First, when the tip 1a of the warp of the steel plate 1 passes, as shown in FIG. 2 (a), the protector 11 is lifted from the pass line PL to a position of height h ₁ and is on standby. There is no interference with the tip 1a. At this time, the jet water can be sprayed from the nozzle 6b to remove the riding water from the tip of the steel plate 1.

Next, after the warp tip 1a of the steel plate 1 has passed, for the normal portion thereof, as shown in FIG. 2 (b), the protector 11 is lowered to a height h ₂ from the pass line PL. The nozzle 6b is positioned at, and is brought close to the steel plate 1 to remove the riding water. In this state, the descending state is maintained only by the weight of the draining device 6. Then, as shown in FIG. 2 (c), when the bulge 1b of the steel plate 1 comes into contact with the protector 11, the drainer device 6 is lifted by the steel plate 1, but the link arms 23, 24 are pinned by the pins 21, 22, 25, 26. Since it rotates, the external force generated by the steel plate 1 can be released.

At this time, the protector 11 is a parallel link mechanism.
Since the levelness is maintained by 20, the draining angle θ of the nozzle 6b with respect to the steel plate 1 can be maintained, and the draining can be restarted immediately after the bulge 1b passes.
Using the draining device of the present invention, the standby height h ₁ ; 1200
mm, normal height h ₂ ; 500 mm, draining angle θ; 25 °,
When water was drained under the conditions of a water pressure of 20 kgf / cm ² and a water amount of 500 l / min, a remarkable draining effect could be obtained. The water pressure of 20 kgf / cm ^{2 at} this time was used conventionally.
To ^{30kgf / cm 2, 10kgf / cm} 2 it could also be reduced.

[0016]

As described above, according to the present invention,
Since the protector with the nozzle fixed at a predetermined angle is movably held using the parallel link mechanism, it is possible to effectively drain water over the entire length of the steel plate and at a lower water pressure than before, which allows running costs and equipment. The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.

2 (a) to 2 (c) are explanatory views of the operation of the device of the present invention.

FIG. 3 is a schematic view showing a conventional hot rolling line.

FIG. 4 is an explanatory diagram showing a configuration example of a conventional drainer.

5 (a) and 5 (b) are explanatory views of problems of the water draining device of FIG.

FIG. 6 is a schematic diagram showing another configuration example of a conventional drainer.

FIG. 7 is a schematic diagram showing another configuration example of a conventional drainer.

8A and 8B are explanatory views showing the problem of FIG. 6 and the problem of FIG. 7, respectively.

[Explanation of symbols]

 1 Steel plate 6 Draining device 6a Header 6b Nozzle 7 Draining water 8 Conveyor roller 9 Riding water 11 Protector 14 Fixed frame 20 Parallel link mechanism 21, 22, 25, 26 pin 23, 24 Link arm PL pass line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Soichiro Onda 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Co., Ltd. Chiba Steel Works (72) Nobuhiro Ito 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Co., Ltd. Chiba Steel Works (72) Inventor Hiroyuki Ogawa 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Co., Ltd. Chiba Steel Works (72) Inventor Morio Iwasaki 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Address Ishikawajima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center (72) Inventor Kenji Triangle 1 Shinshinarahara-cho, Isogo-ku, Yokohama, Kanagawa Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center

Claims (1)

[Claims] 1. A nozzle for injecting draining water, which is attached to the outlet side of a steel plate cooling device of a hot rolling line and is removed by a conveyor roller, for removing ride water on the steel plate, is fixed to a protector. In the hot-rolling line, the protector is movably supported on a fixed frame provided in the upper part of the transport roller in parallel with the pass line via a parallel link mechanism. Drainer.