JP2655929B2 - Support roll equipment for metal strip bath - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a metal strip bath installed in a hot-dip galvanizing facility, an annealing facility, or the like to maintain a relatively high-temperature metal strip pass line. The present invention relates to a support roll device.

<Prior Art> In hot-dip galvanizing equipment, annealing equipment, and the like, a support roll device is installed as a means for fixing and maintaining a traveling pass line of a metal strip (hereinafter, referred to as a strip). For example, in a hot-dip galvanizing tank 8 of the hot-dip galvanizing equipment as shown in FIGS. 3 and 4, the annealed strip 1 coming out of the snout 2 is immersed in hot-dip zinc 10 by a sink roll 3 and then immersed in a bath. The support roll 4 corrects the curvature and stops swinging to stabilize it. After being pulled up from the molten zinc 10, the wiping nozzle 5 performs gas wiping to adjust the plating weight per unit area.

When performing the alloying treatment in the alloying furnace 6, it is important to stably maintain the pass line of the strip 1 from the viewpoint of making the basis weight and the degree of alloying of the plating layers on the front and back surfaces uniform. For this purpose, two on-bath support rolls 9 are arranged above the wiping nozzle 5 to guide the strip to the alloying furnace 6 while keeping the strip pass line fixed. 7 indicates a deflector roll.

However, in the case of a product that does not require alloying treatment in the alloying furnace 6, the use of the on-bath support roll 9 causes the plating surface of the slip 1 to be roughened, so that the on-bath support roll 9 is stripped from the pass line. It must be retracted to a position where it does not touch 1 or removed.

<Problems to be Solved by the Invention> When the hot-dip galvanizing equipment provided with the above-mentioned on-bath support roll 9 is used, there are the following problems.

When operating without using the support roll on the bath, the support roll 9 on the bath is connected to the strip 1 as shown in FIG.
By simply retreating to a position where it does not come into contact with the strip, the support roll 9 on the bath which is originally straight as shown by the solid line due to the radiant heat from the high-temperature strip 1 undergoes thermal deformation as shown by the two-dot chain line, causing a bend. It will cause trouble.

As a countermeasure against the above-described problem, the retreat stroke of the bath support roll may be increased, but this requires a large installation space for the bath support roll. In addition, when the support roll on the bath is not used, the entire roll may be removed. In this case, it is necessary to stop the production line for the removal work. Hang. In addition, the support roll on the bath may be idled at the retracted position, but a driving device for idling is required, which is uneconomical.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a metal strip bath support roll that can be retracted near a strip while preventing bending of the bath support roll without removing the bath support roll. The purpose is to provide.

<Means for Solving the Problems> The present invention for achieving the aforementioned object is a bath support roll device for maintaining a hot metal strip pass line, comprising: a bearing mounted on a fixed frame; A rotating shaft supported by bearings, a rear end attached to the rotating shaft, a bath support roll at the leading end, and a forward / reverse drive of the rotating shaft to face / separate the metal strip surface. A rotating arm for freely rotating and moving the bath support roll to the pass line position and the retreat position, and the rotating arm in a positional relationship to cover one half of the bath support roll when the bath support roll is in the retreat position. And a fixed-side heat shield attached to the fixed frame in a positional relationship to cover the remaining half of the support roll when the support roll on the bath is in the retracted position, The moving-side heat shield and the fixed-side heat shield cooperate to cover the entire surface of the bath support roll from both sides when the bath support roll is retracted from the pass line position to the retreat position. A support roll apparatus for supporting a metal strip on a bath.

<Operation> Since the present invention has the above-described configuration, when the support roll on the bath is in the retracted position, the moving-side heat-shielding plate and the fixed-side heat-shielding plate cooperate to cover the entire surface of the bath support roll. Radiant heat from the metal strip is shielded.
As a result, bending of the on-bath support roll retracted near the metal strip can be prevented.

An embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the on-bath support roll device of the present invention includes a rotating shaft 13 supported by a bearing 12 mounted on a fixed frame 11, a rotating shaft 13 attached to the rotating shaft 13 from a descending end, and a leading end. It has a support roll 9 on the bath, and rotates forward and backward by rotating the rotating shaft 13 by a driving device (not shown) so as to freely contact and separate from the surface of the metal strip 1 and pass the support roll 9 on the bath. The pivoting arm 14 is moved between the line position and the retracted position, and is attached to the pivoting arm 14 in a positional relationship covering one half of the bathing support roll 9 when the bathing support roll 9 is in the retracted position. Moving side heat shield 15
And a fixed-side heat-insulating plate 16 attached to the fixed frame 11 in a positional relationship covering the other half of the support roll 9 when the on-bath support roll 9 is in the retracted position.

The rotating arm 14 has a structure in which the bath support roll 9 and the moving-side heat-insulating plate 15 are integrally rotated about a rotation shaft 13 supported by a bearing 12. In order to move the support roll 9 on the bath when the strip 1 is used on the pass line and when the support roll 9 is retracted and not used, the rotary arm 14 is moved by two.
The rotation is performed in the direction indicated by the dotted line. The rotating mechanism of the rotating arm 14 is driven by rotating the rotating shaft 13 supported by the bearing 12 in forward and reverse directions, and a known conventional means can be used as the driving device.

The moving-side heat shield 15 that rotates integrally with the rotating arm 14 is
When the bath support roll 9 is used, as shown in FIG. 1, the bath support roll 9 is lifted while being rotated via the rotation arm 14, and the tip of the moving-side heat-insulating plate 15 is placed on the metal strip 1. Locate nearby. Thus, the on-bath support roll 9 protrudes from between the distal end of the moving-side heat shield 15 and the distal end of the fixed-side heat shield 16 to fix and maintain the line of the metal strip 1.

When the bath support roll 9 is not used, the bath support roll 9 is lowered while rotating via the rotating arm 14, and the bath support roll 9 is moved to the retracted position as shown in FIG. Accordingly, the movable heat shield 15 attached to the rotating arm 14 also rotates without interfering with the metal strip 1. Thus, the moving-side heat-insulating plate 15 is interposed between the bath-side support roll 9 and the metal strip 1, and cooperates with the fixed-side heat-insulating plate 16 to cover the entire surface of the bath-side supporting roll 9, and the high-temperature The radiant heat from the strip 1 is shielded to prevent thermal deformation of the on-bath support roll 9.

It is preferable to use a heat-resistant material such as stainless steel for the moving-side heat-insulating plate 15 and the fixed-side heat-insulating plate 16 and to make the outer surface glossy to improve the reflection effect.

In the present embodiment, the on-bath support roll disposed at the entrance of the vertical alloy furnace has been described, but the present invention can also be used for a single on-bath support roll, The present invention is not limited thereto, and is applicable to a horizontal or inclined path line. Further, the present invention is applicable to a pass line that switches between contact conveyance by a support roll on a bath and non-contact conveyance by a gas rotor.

<Effects of the Invention> As described above, according to the present invention, it is possible to prevent thermal deformation of the bath support roll without removing the support roll on the bath as in the related art or retreating away from the bath. There is no need to stop the line or remove the roll, thus improving productivity. In addition, since the apparatus is compact, it is possible to reduce the equipment cost and to reduce the installation space.

[Brief description of the drawings]

1 and 2 are side views showing an embodiment of the apparatus of the present invention, FIG. 1 shows a case where a support roll on a bath is used and a pass line is maintained, and FIG. Shows when the support roll on the bath is retracted without being used. FIG. 3 is a schematic diagram showing a configuration example of a conventional galvanizing equipment, FIG. 4 is a perspective view of the same, and FIG. 5 is an explanatory diagram showing a bending state due to thermal deformation of a support roll on a bath. 1 ... strip, 2 ... snout, 3 ... sink roll, 4 ... support roll in bath, 5 ... wiping nozzle, 6 ... alloying furnace, 7 ... deflor, 8 ... molten zinc tank, 9 ...... Support roll on bath, 10 ... Molten zinc, 11 ... Fixed frame, 12 ... Bearing, 13 ... Rotating shaft, 14 ... Rotating arm, 15 ... Movable heat shield, 16 ... Fixed side Heat shield.

Claims (1)

(57) [Claims] An on-bath support roll apparatus for maintaining a hot metal strip pass line, comprising: a bearing mounted on a fixed frame; a rotating shaft supported by the bearing; and a rear end connected to the rotating shaft. Is mounted, and has a bath support roll at the tip end. The forward / backward drive of the rotating shaft rotates freely to approach and separate the surface of the metal strip to retract the bath support roll from the pass line position. A rotating arm to be moved to a position, a moving heat shield attached to the rotating arm in a positional relationship covering one half of the bath support roll when the bath support roll is in the retracted position, and a bath support roll. At the evacuation position, it comprises a fixed side heat-insulating plate attached to the fixed frame in a positional relationship covering the other half of the one side, and the bath support roll retreats from the pass line position to the evacuation position. Wherein the moving-side heat shield and the fixed-side heat shield cooperate to cover the entire surface from both sides of the bath support roll. .