JP3033888B2 - Steel strip support for annealing furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a steel strip in an annealing furnace, and more particularly, to a steel strip running in a continuous annealing furnace comprising a plurality of furnace chambers. The present invention relates to a steel strip supporting device that supports the steel strip while maintaining ease of replacement at the time of maintenance.

[0002]

2. Description of the Related Art Generally, a catenary type continuous annealing furnace is used in an annealing / pickling line in the production of stainless steel sheets. This is made up of a plurality of furnace chambers having different furnace temperatures, and the steel strip running in the furnace chamber is supported by a support device provided outside the furnace from the viewpoint of suppressing the occurrence of surface flaws and the like. I have.

As this steel strip supporting apparatus, a separate room is provided between each furnace chamber, and two roll-type rotatable supports (hereinafter, referred to as supporting rolls) are provided therein as shown in FIG. Those that are arranged are often used. One of the two support rolls 2, 5 is for replacement, and usually only one is used to support the steel strip (industrial heating,
vol 28, no. 5). In FIG. 2, both of the support rolls 2 and 5 are covered with a cover that surrounds a water-cooled tube 9 called a linter 10 with a refractory material to protect the support rolls 2 and 5 from high heat. The lifting means and the supporting means necessary for setting the support rolls 2 and 5 are not shown in the figure since a known means such as a cylinder is used.

[0004] Another type of supporting device is disclosed in
As disclosed in Japanese Patent Application Publication No. 11338, there is also a type in which a support roll loaded on a cart is disposed so as to be able to freely enter and exit a room provided between the furnace chambers. However, this trolley type,
The equipment becomes large and there is a problem in terms of equipment cost. In the conventional support device shown in FIG. 2, since the replacement support roll 5 is also disposed immediately below the steel strip to be annealed, foreign matter such as scale adheres to the surface of the replacement support roll 5. It is easy to cause indentation flaws on the surface of the steel strip when used after replacement, which often causes a problem of lowering the yield of the product steel strip.

When replacing the used support roll 2 with the standby replacement support roll 5 which is waiting,
Unless the operation of the annealing line is stopped and the annealing furnace is cooled, work cannot be performed, and there is a problem that the line operation rate is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a steel strip supporting apparatus for an annealing furnace which can be easily replaced without stopping the operation of a line and which prevents adhesion of scale. It is intended to be.

[0007]

Means for Solving the Problems The inventor of the present invention has intensively studied to achieve the above object, and has completed a new steel strip supporting device capable of solving the above-mentioned problems at the same time. That is, the present invention relates to a steel for an annealing furnace having a support roll for supporting a steel strip running in the furnace chamber and a support roll for replacing the support roll between each furnace chamber of the continuous annealing furnace. A belt support device, wherein the support roll and the replacement support roll are vertically separated by a partition, and an opening provided with an openable / closable door is provided in a partition below a position where the support roll is used. Elevating means for waiting the replacement support roll below an opening different from below the support roll in use,
A steel strip supporting apparatus for an annealing furnace, comprising a vertically slidable scale cover for storing a scale falling above the replacement support roll placed on the elevating means.

By using the steel strip supporting device having such a structure, the replacement support roll is prevented from adhering scale and can be easily replaced even during operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A steel strip supporting apparatus for an annealing furnace according to the present invention will be described below with reference to FIG. First, the support roll 2 used for supporting the steel strip 1 is set at a predetermined position by a support means (not shown). Since the support roll 2 and the support roll 2 are alternately used, there are two predetermined positions in the running direction of the steel strip. Further, in the present invention, a partition wall 7 is provided to surround the support roll 2 in use and to prevent heat dissipation of the furnace chambers 6a and 6b.
The support roll 2 and the replacement support roll 5 that are being used are separately arranged in the vertical direction. Further, the partition wall 7 corresponding to the lower part of the two predetermined positions is provided with an opening 8 through which the replacement support roll 5 enters and exits.
Is mounted to be openable and closable.

Next, the replacement support roll 5 is placed on support means (not shown), and is disposed immediately below the opening 8 different from the opening 8 where the support roll 2 in use is located. Therefore, when the replacement support roll 5 is replaced, the upper door 3 is opened, and the replacement roll 5 can be easily set to a predetermined position for use by using the lifting / lowering support means 11. The support roll 2 supporting the steel strip and the replacement support roll are shown in FIG.
As shown in FIG.
a, 51b via the air cylinders 23a, 23
b, the air cylinder can be replaced by a one-touch operation by switching the air cylinder.

Further, a scale cover 10 for protecting the replacement support roll 5 from a scale falling by opening and closing the door 3 is attached to the elevating and lowering support means 11, and the cover 10 passes through the opening 3. It can be raised vertically only during the replacement work, that is, it can swing freely.

[0012]

As described above, according to the present invention, the replacement support roll is separated from the one in use by the partition, so that the foreign matter adheres during the standby of the replacement support roll. It has also become possible to replace the support rolls in use during the operation of the annealing line.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an outline of a steel strip supporting device according to the present invention.

FIG. 2 is a longitudinal sectional view showing a conventional steel strip device.

FIG. 3 is a front view illustrating replacement of a support roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel strip 2 Support roll (in use) 3 Door 4 Scale cover 5 Replacement support roll (during standby) 6a, 6b Furnace chamber of annealing furnace 7 Partition wall 8 Opening 9 Water cooling pipe 10 Refractory linter 11 Lifting support means 21a, 21b Bearing 23a, 23b Air cylinder 51a, 51b Bearing

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C21D 9/56 101

Claims (1)

(57) [Claims] 1. A steel strip for an annealing furnace having a support roll for supporting a steel strip running in the furnace chamber and a support roll for replacing the support roll between the respective furnace chambers of the continuous annealing furnace. A support device, wherein the support roll and the replacement support roll are vertically separated from each other by a partition, and two openings provided with openable doors are provided on a partition below a position where the support roll is used. Provided,
Elevating means for waiting the replacement support roll below an opening different from below the in-use support roll, and a vertical direction for storing a scale falling above the replacement support roll placed on the elevating means A steel strip supporting device for an annealing furnace, comprising a swingable scale cover.