JPS6245409A - Roll cooling mechanism - Google Patents

Abstract

PURPOSE:To economize hydraulic power by forming a water passage section along a roll surface and passing gushing water in the longitudinal direction of a roll body. CONSTITUTION:A cooling water guide 4 is provided along the surface of the roll 10 and a narrow water flow space 13 is formed between the guide 4 and the surface of the roll 10. The gap of the space 13 is made freely adjustable by a gap adjusting cylinder 3. Plural pieces of seals 5 internally contg. springs 15 are disposed to the guide 4. Cooling water is passed in the longitudinal direction of the roll 10 body, by which the cooling efficiency is improved. The considerable economization of the hydraulic power with the same cooling state is thus made possible by the above-mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION The present invention relates to the creation of a roll cooling mechanism that achieves high cooling capacity with a relatively small amount of water power and facilitates adjustment of the roll heat crown in the axial direction of the roll. ＠Industrial Application Field Cooling mechanism for rolls such as work rolls.

Conventional technology Aiming for rapid cooling of work rolls in rolling equipment, etc.
Roll cooling is known as a technique for keeping the temperature below a predetermined temperature, and the most common roll cooling method is the spray nozzle method using a spray nozzle 23 as shown in Figure 7. It is.

However, in recent years, rolling mills have become larger and there is a trend toward high-speed, high-load rolling, and the amount of cooling water used for cooling is increasing, reaching 500 to 1000 tr per stand. /hr has also been reached.

For this reason, various proposals have been made to conserve energy regarding cooling and to control the heat crown of the roll. For example, in FIG.
A method of decreasing the flow rate by increasing the injection area A from the valve 25 or 26 in FIG. 7 when the rolled material is not passing (idle time between the leading bar and the trailing bar)
There are methods to reduce the amount of cooling water used through blockage control. However, the energy saving effect of these methods is only about 20 to 50% reduction even if controlled with high precision. Note that methods for controlling the heat crown of the roll include dividing the spray header 24 in the width direction as shown in FIG. 7, or controlling the flow rate using the flow rate control valve 26, but none of these methods are sufficient in terms of adjustable range or precision. do not have.

Therefore, as a roll cooling method in place of such a spray method, for example, Japanese Patent Publication No. 55-12322 and Japanese Patent Application Laid-Open No. 54-83
No. 657, No. 83658, No. 55-24774, No. 57-39011, No. 58-47502, No. 176
009 and Utility Model Publication No. 55-55841, etc.
These methods use a pad 28 as shown in Fig. 8 and are called a pad cooling method, that is, they use a bat 28 to cool the inside thereof, which streamlines energy saving and roll heat crown control to a certain extent. It can be said to be a thing.

Problems to be Solved by the Invention However, in these conventional methods, the jet flow is passed in the circumferential direction of the roll, and in this case, the flow rate Ql is as shown in FIG. 8, assuming that the gap G and the flow velocity V are the same. For example, if the pad length L in FIG. 8 is 2000 m and the width W of the pad 28 is 500 m, a considerable amount of cooling water will be ejected from the long pad length. In order to control this ejection amount, the gap G must be made extremely small, for example, about 2. It's not easy to do.

``Structure of the Invention'' Means for Solving the Problems Roll cooling characterized by forming a water passage space along the roll surface and passing jet water in the water passage space in the longitudinal direction of the roll body. mechanism.

By flowing cooling jet water along the length of the roll body into a narrow water passage space formed along the roll surface by a cooling water guide, etc., the roll can be made more effective with less water power under the same gap and flow velocity conditions. Try to cool down.

Cooling water can be supplied to the cooling water guide at the center of the guide and can be discharged from both ends of the body length of the sea urchin roll as described above, and the flow distance of the cooling water can be obtained in a substantially equal state.Example of the present invention To further explain, in the present invention, the first
As shown in the figure, a cooling water guide 4 is provided along the surface of the roll 1o to form a narrow space 13 between it and the surface of the roll 10, and a jet of water is directed into the space 13 along the length direction of the roll 10. A cooling water guide 4 is provided with a gap adjustment cylinder 3 so that the space 13 between the cooling water guide 4 and the work roll 10 backed up by a backup roll 12 can be adjusted. ing. Such a cooling water guide 4 has a bendable portion 9 appropriately arranged therein, and an auxiliary cylinder 16 is used to appropriately bend the cooling water guide 4 to control the interval 13 therebetween. 5
A plurality of cooling water guides 4 are arranged to enable the adjustment operation of the cooling water guide 4 described above, as well as sealing between the cooling water guide 4 and the roll surface, so that the cooling water flows along the axial direction of the roll 10. That is, as shown in FIG. 1, the cooling water supply pipe 7 has a connecting opening at the center of the length L of the cooling water guide 4 as shown in FIG. The cooling water flows along the roll surface and parallel to the axial direction through the gap G, that is, the space 13, and is discharged from both ends of the cooling water guide 4 as shown in FIG.

As shown in FIG. 5, the cooling water guide 4 according to the present invention has an appropriate curvature in the width direction, or as shown in FIG. By changing the width W of the work roll 10, the roll heat crown of the work roll 10 can be easily adjusted.

To adjust the heat crown as described above, prepare multiple rows of sealing material 5 in the structure shown in Fig. 1.2.
A quick response can be made by allowing cooling water to flow between the sealing materials, bending the guide 4, and separating only the outer peripheral portion of the sealing material 5 from the surface of the roll 10. Further 1.2
The bending portion 9 in the figure may be provided so that the cooling water guide 4 can be bent in the longitudinal direction of the roll body, and adjustment may be made by such bending. In addition, a mechanism is formed in the cooling water guide 4 by superimposing two plates having punch holes on the surface facing the filter roll 10, and one or both of the plates having such punch holes are formed. The surface structure of the cooling water power discharge direction may be adjusted by relatively sliding a part of the roll body in the longitudinal direction. can be given.

To explain a specific example of the operation of the force according to the present invention, when rolling an ordinary steel plate with a thickness of 1.6 to 4.0 mm and a width of 70 to 120 mm, the force according to the present invention and the conventional method are When the spraying method was carried out and the results were examined, it was found that the roll surface temperature after rolling was the same in both cases, and the method according to the present invention required 5 times less cooling than the spray method.
Achieving water power of less than φ, roll heat crown,
Supports to rolling such as roughness on the roll surface) could hardly be found.

Furthermore, it is clear that the space 13 according to the present invention as described above can be adjusted appropriately in relation to the sealing material 5 as described above, and the cooling area can be made variable in the roll axis direction.

"Effects of the Invention" According to the present invention as described above, a high roll cooling effect can be obtained with a small amount of water power, and adjustment operations such as a roll heat crown can be performed, and efficient and preferable roll cooling can be obtained. This invention is industrially very effective because it can be used to tighten the system.

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, in which Fig. 1 is a side view of an example of the mechanism according to the invention, Fig. 2 is a perspective view thereof, and Fig. 2A shows the cooling water. The supply pipe section is also shown, Fig. 3 is an end view of the outline thereof, Fig. 4 is an explanatory view of its slope, and Figs. 5 and 6 respectively show the outline of the correspondence with the roll heat crown. FIG. 7 is an explanatory diagram of the conventional method as seen from the end face side of the roll;
FIG. 8 is an explanatory diagram showing another example. However, in these drawings, 1 is a support frame, 3 is a gap adjustment cylinder, 4 is a cooling water guide, 5 is a sealing material, 7 is a cooling water guide, 10 is a roll, 1
2 is a backup roll, 13 is a space, and 15 is a spring. % application filed Nippon Kokan Co., Ltd. Inventor Akira Shimizu Shunma Takashi Kawasaki
Yutaka Masayuki Teramoto
Wado 1) Motoji Tomoji, Patent Attorney Shirakawa --1st,
ff [i Boru 6th picture / En

Claims (1)

[Claims] A roll cooling mechanism characterized in that a water passage space is formed along the roll surface, and jet water is passed in the water passage space in the longitudinal direction of the roll body.