JP2508715B2 - Roll cooling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll cooling device.

[Prior Art] In a conventional roll cooling device, a plurality of spray nozzles are arranged at required intervals in the axial direction of a rolling roll, and a cooling water supply pipe having a control spray valve is connected to each spray nozzle. Then, by adjusting the spray valve, cooling water is sprayed from the spray nozzle toward the rolling roll at high pressure to cool the rolling roll and control the shape.

However, in the above spray type roll cooling device,
Since the sprayed cooling water hits the surface of the rolling roll and is reflected, and the reflected cooling water and the sprayed cooling water interfere with each other, the cooling water was not used effectively and the cooling efficiency was poor. Furthermore, many expensive spray valves must be used to control the shape of the rolling rolls.

Therefore, in order to solve such a problem, a roll cooling device using a laminar flow has been proposed in recent years as shown in FIGS. 3 to 5. That is, the partition wall 13 is formed in the width direction inside the arc-shaped water jacket 12 that is equal to the outer peripheral surface of the rolling roll 11.
To form a plurality of cooling zones 14 by partitioning, each cooling zone 14 is provided with a water supply port 15 and a drainage port 16 at positions separated from each other, and a water supply pipe 17 is connected to each water supply port 15. Each water supply pipe 17 is provided with an inlet common pipe 20 provided with a valve body 18 and a valve body drive device 19.
And a hose 21 that supplies cooling water to the common pipe 20 on the input side, and the drain pipe 27 and the common pipe on the output side similarly to the drain port 16.
22 and hose 23 are connected in order, and the water jacket
The support 12 is supported by the support portion 24 with a slight gap between it and the rolling roll 11. In addition, 25 is a seal and 26 is a rolled material.

When cooling the rolling roll 11, the cooling water is supplied to the hose 21.
From the inlet common pipe 20, water supply pipe 17, water supply port 15 into the water jacket 12,
Cooling water is brought into contact with the peripheral surface of the rolling roll 11 inside each cooling zone 14 along 12. The cooling water used for cooling is drainage port 16,
Drain through the drain pipe 27, the outlet common pipe 22, and the hose 23. By doing so, the rolling roll 11 is cooled uniformly and efficiently in the axial direction by the laminar flow of cooling water.

Further, when performing the shape control of the rolling roll 11, by moving the position of the valve body 18 inside the inlet-side common pipe 20 by using the valve body drive device 19, by blocking the water supply pipe 17 by the valve body 18, A cooling zone 14 in which cooling water flows and a cooling zone 14 in which cooling water does not flow are created.

[Problems to be Solved by the Invention] However, in the roll cooling device using the laminar flow described above, the water jacket is divided by partition walls to control the cooling zone in order to control the shape of the rolling roll. However, the structure was complicated, and high costs were required for all production, operation, and maintenance.

Further, since the structure is complicated, it is not easy to subdivide the cooling zone to improve the shape controllability of the rolling roll.
Since the switching of the cooling zones 14 is performed by the valve body 18 provided in the common pipe 20 on the inlet side, it is difficult to freely control each cooling zone 14.

SUMMARY OF THE INVENTION The present invention has an object to provide a roll cooling device having a simple configuration in view of the above-mentioned circumstances and capable of easily increasing the accuracy of shape control.

[Means for Solving Problems] The present invention provides a cooling water jacket having a nozzle slit on the circumferential surface of a rolling roll for forming a continuous laminar flow of cooling water along the width direction of the rolling roll. And an air outlet for ejecting air for partially reducing the cooling effect of the cooling water toward the laminar flow of the cooling water formed on the surface of the rolling roll by the cooling water jacket,
A plurality of cooling jackets are provided with a required gap in the width direction to form a roll cooling device.

[Operation] Therefore, in the present invention, the cooling water fed from the nozzle slit of the cooling water jacket is jetted as a laminar flow on the peripheral surface of the rolling roll to uniformly cool the rolling roll in the width direction. The increased flow of cooling water jetted to the rolling rolls further flows along the surface of the rolling rolls, effectively cooling a large area on the surface of the rolling rolls. Also, if air is supplied to any air outlet,
The air is blown from the air outlet toward the cooling water which flows in layers on the surface of the rolling roll, and the air blown out becomes bubbles in the cooling water to reduce the cooling effect of the cooling water on the rolling roll, and the air is blown out. The cooling effect is further reduced by eliminating laminar cooling water in the section. The shape of the rolling roll is controlled by making use of the decrease in the cooling effect due to the blowing of the air and creating a part having a high cooling effect and a part having a low cooling effect in the laminar flow of the cooling water.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are explanatory views of an embodiment of the present invention.

In the vicinity of the contact portion between the rolling roll 1 and the rolled material 2, that is, the bite portion 3, the tip end portion of the cooling water jacket 4 (a passage guide or a draining plate may be used) having substantially the same width dimension as the rolling roll 1. 5 is contacted.

The cooling water jacket 4 is provided with a nozzle slit 6 which is widened in its entire width direction and supplies cooling water 7 to the rear end thereof.

A guide wall 8 extending upward is provided on the upper surface of the tip portion 5 of the cooling water jacket 4 that comes into contact with the rolling roll 1 while maintaining a required distance from the peripheral surface of the rolling roll 1, and the nozzle slit 6 is provided with the tip portion. 5 and the guide wall 8 are opened at an intermediate portion.

Further, a plurality of air outlets 9 are formed in the guide wall 8 with a required space in the width direction, and an air supply pipe 10 capable of adjusting the flow rate of air is connected to each air outlet 9.

When cooling the rolling roll 1, when cooling water 7 is supplied from the rear end of the cooling water jacket 4 to the nozzle slit 6, the cooling water 7 flows from the tip of the nozzle slit 6 in a uniform laminar flow in the axial direction of the rolling roll 1. And is jetted onto the surface of the rolling roll 1 closer to the bite portion 3, and the rolling roll 1 is slit laminar cooled by the laminar flow of the cooling water 7.

Further, the cooling water 7 ejected from the nozzle slit 6 drains the cooling water 7 at the tip portion 5 which is in contact with the rolling roll 1 and prevents the cooling water 7 from leaking, so that the peripheral surface of the rolling roll 1 is guided along the guide wall 8. It flows backwards. Since the laminar flow of the cooling water 7 flows backward on the circumferential surface of the rolling roll 1, the contact area and the contact time of the cooling water 7 with respect to the rolling roll 1 increase, and the cooling water 7 flows without staying, The rolling roll 1 is cooled uniformly and efficiently. Further, the cooling water 7 to be supplied may be low pressure.

Next, when the shape control of the rolling roll 1 is performed, if air is supplied to an air outlet 9 connected from an arbitrary air supply pipe 10 during the cooling of the rolling roll 1, cooling is performed to trace back the peripheral surface of the rolling roll 1. Bubbles are generated in the water 7 by the air blown only to the air outlet 9 portion to which the air is supplied,
The cooling effect on the rolling roll 1 is reduced in the portion where the bubbles are generated, and further, the cooling effect on the rolling roll 1 is reduced by removing the cooling water in the vicinity of the bubbles. By utilizing the phenomenon of the partial cooling effect reduction of the rolling roll 1 due to the air blowing, the rolling roll 1 can be arbitrarily adjusted to have a high cooling effect portion and a low cooling effect portion.
The shape control can be performed.

Further, since the simple structure is provided as described above, the accuracy of the shape control for the rolling roll 1 can be easily increased by increasing the number of the air outlets 9.

Furthermore, since air can be blown from any air outlet 9, the shape of the rolling roll 1 can be freely controlled with respect to any position in the axial direction.

Incidentally, the present invention is not limited to the above-mentioned embodiment, and even if the laminar flow formed on the surface of the rolling roll does not follow the guide wall, the air blowout port is independent and the air is directed toward the laminar flow. Needless to say, it is possible to control the shape of the rolling roll by arranging so as to blow out, and to make various changes without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the roll cooling device of the present invention,
The shape of the rolling roll can be controlled with a simple configuration that the rolling roll can be cooled effectively by the laminar flow of cooling water and that air is blown into the laminar flow of cooling water to partially reduce the cooling effect of the cooling water. What can be done, the number of air blowing points can be easily increased due to the simple configuration, the precision of the shape control of the rolling roll can be freely increased, and the simple configuration facilitates production, operation and maintenance. It is possible to achieve various excellent effects such as that it can be easily performed, and that the shape control of the rolling roll can be arbitrarily performed both symmetrically and asymmetrically in the axial direction.

[Brief description of drawings]

1 is an explanatory view of an embodiment of the present invention, FIG. 2 is a perspective view of FIG. 1, FIG. 3 is an explanatory view of a conventional example, and FIG. 4 is a supply of cooling water to a water jacket of FIG. FIG. 5 is an explanatory view of a portion, and FIG. 5 is an explanatory view of a state where the water jacket of FIG. 3 is installed on a rolling roll. In the figure, 1 is a rolling roll, 2 is a rolled material, 3 is a bite member, 4
Is a cooling water jacket, 5 is a tip portion, 6 is a nozzle slit, 7 is cooling water, 8 is a guide wall, 9 is an air outlet, and 10 is an air supply pipe.

Claims (1)

(57) [Claims] 1. A cooling water jacket having nozzle slits for forming a laminar flow of cooling water continuous along the width direction of the rolling roll is provided on the peripheral surface of the rolling roll, and rolling is performed by the cooling water jacket. An air outlet for ejecting air for partially reducing the cooling effect of the cooling water toward the laminar flow of the cooling water formed on the roll surface,
A roll cooling device, wherein a plurality of roll cooling devices are provided with a required gap in the width direction of the cooling water jacket.