JPH10137822A - Detachable type multi-column roll cooling water header of vertical rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the time for changing a caliber on line and to improve the productivity of the whole rolling line by subdividing the inner part of a roll cooling water header into plural headers with diaphragms and feeding the cooling water to each subdivided chamber. SOLUTION: A pair of left and right roll cooling water header 1 is provided with the height covering the whole length of the roll drum, and the inner part of the roll cooling water header is subdivided into plural headers with diaphragms. Also, a hose 2 feeding the cooling water and a switching valve 3 are provided in every chamber of the subdivided header, the valve of the roll cooling water header used in the used caliber is closed and at the same time the valve of the roll cooling water header being used in the next caliber to be used is opened in order to change the caliber, whereby the cooling caliber is allowed to change by only the valve operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removable multi-row roll cooling water header for a vertical rolling mill of a round bar and a wire rod rolling mill.

[0002]

2. Description of the Related Art Generally, in bar and wire rolling, a vertical rolling mill and a horizontal rolling mill are alternately arranged to form a rolling mill row. The caliber cut into this rolling roll is changed with the progress of roll wear due to rolling and a change in rolling dimension. Therefore, when changing the used caliber, it is necessary to shift the roll cooling water header that supplies the cooling water to the roll to a position where the next used caliber can be cooled for the purpose of suppressing the roll wear during rolling.

[0005] Therefore, as shown in FIG. 5, in the conventional roll cooling water header 1, a hammer-shaped bolt 12 and a nut 13 are used for a fixed post 11 and a stay 14 via a stay 14. It is attached to the outside of the used caliber 16. Therefore, when the used caliber 16 is changed on-line during rolling, the nut 13 fastened to the hammer bolt 12 is loosened, and then the roll cooling water header 1 is moved to the next used caliber 16 and the hammer bolt 12 is again moved. To fix the roll cooling water header 1. Actually, the operation of moving the roll cooling water header 1 is performed by the above operation. FIG. 6 is a front view of roll cooling water to a conventional vertical rolling mill.

[0004]

As described above, FIG.
Also, in the conventional roll cooling water header equipment for a vertical rolling mill as shown in FIG. 6, when changing the used caliber 16 in the online state during rolling, the operation of moving the roll cooling water header 1 by the above-described operation is performed. Is possible. However, since the roll cooling water header 1 is mounted in the immediate vicinity of the roll for the purpose of securing the cooling effect, it is necessary for the worker to support the header when moving the upper header where the work space is narrow, so that both the work efficiency and the work environment are poor.

When the rolls are changed in an off-line state, it is necessary to discharge the rolls from the rolling mill. However, since the axle boxes 15 attached to both ends of the rolls interfere with the roll cooling water header, the fixed posts 11 are required. It is necessary to remove the stay 14 from the stand and pull out the roll cooling water header 1 itself from the stand. Further, after the roll replacement is completed, the drawn-out roll cooling water header 1 must be attached to the position of the used caliber 16 in the reverse order to the above. All of the above-mentioned operations cannot be performed by one worker, and are actually performed by at least two workers. Accordingly, an object of the present invention is to provide a roll cooling device that can improve the efficiency of a caliber changing operation online and reduce the workload, and reduce the load of an online roll changing operation.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the inventors have made intensive developments. As a result, once the roll is set once during the online roll assembling work, the roll cooling is performed when the online caliber is changed. The shape of the roll cooling water header that covers the entire roll body length has been changed to eliminate the movement of the water header, and the header can be fixed easily by removing it from the stand when changing rolls offline. In the device.

The gist of the invention is as follows: (1) In a detachable multi-row roll of a vertical rolling mill, a pair of left and right roll cooling water headers are arranged at a height covering the entire roll body length, and the roll cooling is performed. A removable multi-row roll cooling water header for a vertical rolling mill, wherein the inside of the water header is subdivided into a plurality of headers by a partition plate and cooling water is supplied to each subdivided chamber. (2) In the roll cooling water header replacing device according to (1), a pair of rail holding brackets are fixed,
A vertical rolling mill is detached by inserting an inverted T-shaped rail by the bracket, and fitting the lower T-shaped rail to the lower part of the roll cooling water header to form a mounting guide rail. In the formula multi-row roll cooling water header.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram of a vertical rolling mill according to the present invention. FIG. 2 is a sectional view taken along line AA ′ of FIG.
1 is a front sectional view of a vertical rolling mill according to the present invention. Figure 1,
As shown in FIGS. 2 and 3, the pair of left and right roll cooling water headers 1 has a height that covers the entire length of the roll body, and the inside of the roll cooling water header is subdivided into a plurality of headers by a partition plate. In addition, a hose 2 for supplying cooling water to each compartment of the subdivided header and a switching valve 3 are provided. To change the caliber, the valve of the roll cooling water header used for the used caliber is closed and the next used caliber is used. By opening the valve of the roll cooling water header to be used, the cooling caliber can be changed only by operating the valve.

FIG. 4 is a schematic view showing a device for fixing a roll cooling water header to a stand according to the present invention. As shown in FIG. 4, a pair of rail holding brackets 4 and 5 are fixed with bolts 6 at positions avoiding interference with the axle box storage section at the lower part of the stand, and the inverted T-shaped bracket is used by the rail holding brackets. Insert the rail 7. The metal fitting 8 attached to the lower part of the roll cooling water header is fitted on the rail to fix the header in the vertical direction, and to remove the header and replace the header when the roll is replaced. The positioning of the header in the front-rear direction employs a method of fixing the stay 10 to the fixing post 9 shown in FIG. 1 with bolts.

[0010]

EXAMPLES Table 1 shows a comparison of the work efficiency when a caliber change is performed online. By employing the multi-row cooling water header of the present invention, both the number of workers and the work time can be reduced by half as compared with the conventional header shown in FIGS. 5 and 6. Table 2 shows a comparison of work efficiency when the roll change is performed online. By employing the multi-row cooling water header of the present invention as compared with the above-described conventional type header, both the number of working personnel and the working time can be reduced by half.

[0011]

[Table 1]

[0012]

[Table 2]

[0013]

As described above, if the roll cooling water header according to the present invention is employed in a vertical rolling mill, the online caliber replacement time can be shortened as compared with the conventional type using a roll cooling water header. The productivity of the entire rolling line is improved. Further, the present invention has extremely excellent effects such as an effect of improving the efficiency of the roll changing operation offline and reducing the work load.

[Brief description of the drawings]

FIG. 1 is a schematic view of a vertical rolling mill according to the present invention.

FIG. 2 is a sectional view taken along the line AA ′ of FIG.

FIG. 3 is a front sectional view of a vertical rolling mill according to the present invention.

FIG. 4 is a schematic view of a device for fixing a roll cooling water header to a stand according to the present invention.

FIG. 5 is a schematic plan view of a conventional header device for recirculating water to a vertical rolling mill.

FIG. 6 is a schematic front view of a conventional rewinding water rewinding header device for a vertical rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll cooling water header 2 Hose 3 Switching valve 4, 5 Rail holding bracket 6 Bolt 7 Rail 8 Hardware 9, 11 Fixing post 10 Stay 12 Hammer bolt 13 Nut 14 Stee 15 Shaft box 16 Used caliber

Claims (2)

[Claims] In a removable multi-row roll of a vertical rolling mill, a pair of left and right roll cooling water headers is disposed at a height covering the entire roll body length, and the inside of the roll cooling water header is:
A detachable multi-row roll cooling water header for a vertical rolling mill, wherein a plurality of headers are subdivided by a partition plate and cooling water is supplied to each subdivided chamber. 2. The roll cooling water header replacing device according to claim 1, wherein a pair of rail holding brackets are fixed, and the inverted T-shaped rail is inserted by the brackets.
On the other hand, a detachable multi-row roll cooling water header for a vertical rolling mill, wherein the header is fitted to the lower part of the roll cooling water header, and the roll cooling water header is removed and configured as a mounting guide rail.