JPH042760A - Supporting roll device for metallic strip - Google Patents

Abstract

PURPOSE:To prevent the deformation of the supporting roll by radiant heat and to easily reuse the roll by retreating the roll for stabilizing a high-temp. traveling steel strip from the strip surface when not in use and shielding the roll from the radiant heat from the high-temp. strip by a heat shielding plate. CONSTITUTION:A galvanized steel strip 1 is continuously introduced into an alloying furnace to alloy the Zn layer and the Fe in the strip 1. In this case, the strip is supported by the two supporting rolls 9 and 9 above the plating bath to prevent the oscillation of the strip 1, and the pass line of the strip 1 is stabilized. When the roll 9 is not used, the roll 9 is retreated from the strip surface by a rotary arm 14 fixed to a bearing 12, and the roll 9 is covered by the movable heat shielding plate 15 and fixed heat shielding plate 16 to interrupt the radiant heat from the high-temp. strip 1. Consequently, the thermal deformation of the roll 9 is prevented, the roll is easily reused when needed, and the productivity of the device is improved.

Description

[Detailed description of the invention] <Industrial application field> The present invention is applicable to hot-dip galvanizing equipment, annealing equipment, etc.
The present invention relates to a metal strip support roll device installed to maintain a relatively high temperature metal strip pass line.

<Prior Art> In hot-dip galvanizing equipment, annealing equipment, etc., support roll devices are installed as means for fixing and maintaining the traveling path line of a metal strip (hereinafter referred to as strip).

For example, in a hot-dip galvanizing bath 8 of a hot-dip galvanizing facility as shown in FIGS. 3 and 4, an annealed strip 1 coming out of a snout 2 is immersed in hot-dip zinc 10 by a zinc roll 3, and then immersed in the bath. The curvature is corrected by the support roll 4 and the rocking is stopped to stabilize it, and after being pulled up from the molten zinc 10, it is gas wiped by the wiping nozzle 5 and adjusted to a predetermined plating area weight.

By the way, when performing alloying treatment in the alloying furnace 6, it is more important to maintain the pass line of the strip 1 stably than from the viewpoint of making uniform the area weight and alloying degree of the plating layers on the front and back surfaces. . Therefore, there are 2 parts above the wiping nozzle 5.
An on-bath support roll 9 is provided to maintain the pass line of the strip in a fixed state and lead it to the alloying furnace 6. 7 indicates a deflector roll.

However, in the case of products that do not require alloying treatment in the alloying furnace 6, if the bath support roll 9 is used, the plating surface of the strip 1 will become rough, so the bath support roll 9 may be removed from the pass line. It is necessary to retract it to a position where it does not touch the strip 1, or to remove it.

<TJRB to be Solved by the Invention> When using the hot-dip galvanizing equipment provided with the above-mentioned bath support roll 9, there were the following problems.

When operating without using a support roll, as shown in Part 5, simply retracting the above-bath support roll 9 to a position where it does not touch the strip 1 will cause the radiant heat from the high-temperature strip 1 to cause damage as shown by the solid line. The straight bath roll 9 is thermally deformed and bent as shown by the two-dot chain line, which causes problems during use.

As a countermeasure to the above-mentioned problem, it is possible to increase the backward stroke of the bath roll, but this increases the installation space for the beam boat roll.

Further, the entire support roll may be removed when not in use, and in this case it is necessary to stop the production line for the removal work, which not only reduces productivity but also costs money for the removal and installation work. Although the support roll may be idled in the retracted position, it requires a drive device for idle rotation, which is uneconomical.

The present invention has been made in view of the above circumstances, and
It is an object of the present invention to provide a metal strip support roll that can be retreated close to the strip while preventing the support roll from bending without removing the support roll.

Means for Solving the Problems> To achieve the above object, the present invention provides a support roll device for maintaining the pass line of a high-temperature metal strip, comprising a bearing attached to a fixed frame, and A rotating arm attached to a supported rotating shaft, a support roll attached to the tip of the rotating arm, and a moving-side heat insulating plate that is integrally attached to the rotating arm and covers one half of the support roll. and a fixed side heat insulating plate that is attached to the fixed frame and covers the remaining half of the support roll, and when the support roll retreats from the pass line position to the retracted position, the moving side heat insulating plate and the fixed side heat insulating plate This is a support roll device for metal strips, characterized in that the metal strips are combined to cover the front surface of the support roll from both sides.

Since the present invention has the above-described configuration, when the support roll is in the retracted position, the front side of the support roll is covered by the combination of the moving side heat insulating plate and the fixed side heat insulating plate, so that the radiant heat from the high temperature metal strip is prevented. shielded.

As a result, the support roll retracted near the metal strip can be prevented from bending.

<Example> An example of the present invention will be described below based on the drawings.The bath support roll device of the present invention includes a bearing 12 attached to a fixed frame 11 and a bearing 12 as shown in FIG. a rotating arm 14 attached to a rotating shaft 13 supported by a rotating arm 14; an above-bath support roll 9 attached to the tip of the rotating arm 14; Moving side heat shield plate 1 covering half of one side
5, and a fixed side heat insulating plate 16 that is attached to the fixed frame 11 and covers the remaining half of the bath support roll 9.

The rotating arm 14 is structured to integrally rotate the upper bath roll 9 and the moving side heat insulating plate 15 around a rotating shaft 13 supported by a bearing 12, and rotates the upper bath support roll 9 with a metal strip. The rotation arm 1 moves the bath support roll 9 forward and backward when the bath support roll 9 is positioned on the pass line of 1 and when the bath support roll 9 is retracted and is not used.
4 in the direction shown by the two-dot chain line. The rotation of the rotation arm 14 may be performed using conventional means such as rotating the rotation shaft 13 supported by the bearing 12 using a drive device (not shown).

When the above-bath support roll 9 is used, the movable side heat shield 15, which rotates integrally with the rotation arm 14, rotates the above-bath support roll 9 via the rotation arm 14, as shown in FIG. The top of the moving side heat insulating plate 15 is positioned near the metal strip L, and the bath support roll 9 protrudes between it and the tip of the fixed side heat insulating plate 16 to fix and maintain the line of the metal strip 1. do.

When the upper bath support roll 9 is not in use, the upper bath support roll 9 is rotated and lowered via the rotation arm 14, and when the upper bath support roll 9 is moved to the retracted position as shown in the second time, the upper bath support roll 9 is rotated. A moving side heat shield 15 attached to an arm 14 rotates without interfering with the metal strip 1. In this way, the movable heat shield plate 15 is interposed between the bath support roll 9 and the metal strip l, and is combined with the fixed heat shield plate 16 to form the bath support roll 9.
, and shields the radiant heat from the high-temperature strip 1 to prevent thermal deformation of the bath support roll 9. It is preferable that the movable side heat shield plate 15 and the stationary side heat shield plate 16 be made of a heat resistant material such as stainless steel and have a glossy outer surface to improve the reflective effect.

In this embodiment, a bath support roll disposed at the entrance of a vertical alloy furnace has been described, but the present invention can also be used with a single support roll.

Further, the present invention is not limited to being perpendicular to the pass line, but can also be applied to horizontal or inclined pass lines. Further, the present invention can be used in a pass line that switches between contact conveyance using support rolls and non-contact conveyance using a gas rotor.

<Effects of the Invention> As explained above, according to the present invention, thermal deformation of the support roll can be prevented without removing the support roll or retracting it far away as in the conventional case. Roll removal costs are also unnecessary, and productivity improvements are achieved. Furthermore, since the device is compact, the equipment cost can be reduced and the installation space can also be reduced.

[Brief explanation of drawings]

1 and 2 are side views showing one embodiment of the device of the present invention, in which FIG. 1 shows the support roll when it is used and maintains the pass line, and FIG. 2 shows the support roll when the pass line is maintained. Indicates when the is not being used and is being evacuated. Third
The figure is a schematic diagram showing an example of the configuration of conventional galvanizing equipment.
The figure is a perspective view of the same, and FIG. 5 is an explanatory diagram showing a state of bending due to thermal deformation of the support roll. DESCRIPTION OF SYMBOLS 10... Molten zinc, 12... Bearing, 14... Rotating arm, 16... Fixed side heat shield. DESCRIPTION OF SYMBOLS 11... Fixed frame, 13... Rotating shaft, 15... Moving side heat shield, 1... Strip, 2... Snout, 3...
・Zin roll, 4...Bath support roll, 5.
・・Wiping nozzle,

Claims (1)

[Claims] A support roll device for maintaining a pass line of a high-temperature metal strip, the support roll device comprising a bearing attached to a fixed frame, a rotating arm attached to a rotating shaft supported by the bearing, and a tip end of the rotating arm. a support roll attached to the rotating arm, a movable side heat shield plate that is integrally attached to the rotating arm and covers one half of the support roll, and a fixed side heat shield plate that is attached to the fixed frame and covers the other half of the support roll. and configured such that when the support roll is retracted from the pass line position to the retracted position, the moving side heat insulation plate and the fixed side heat insulation plate are combined to cover the front surface of the support roll from both sides. A metal strip support roll device featuring: