JP2965793B2 - High temperature strip winder - 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 winding a hot strip.

[0002]

2. Description of the Related Art When a high-temperature strip is wound around a mandrel at a high temperature in a high-temperature strip coiler, a mandrel of the coiler is protected from the high heat of the high-temperature strip by providing an insulating sleeve or a heat insulating material outside the mandrel.

As a method of protecting such a conventional mandrel of a coiler from the high heat of a high-temperature strip, Japanese Patent Publication No. 60-32694, Japanese Patent Publication No. 60-32695, Japanese Patent Application Laid-Open No. 56-47215, and Japanese Patent Application Laid-Open No. 56-62
Various proposals have been made in Japanese Patent Application Laid-Open No. 618, Japanese Patent Application Laid-Open No. 56-95416, Japanese Patent Application Laid-Open No. 58-138517, and the like. These conventional proposals have proposed a spool (or sleeve) having an insulating structure between the mandrel and the strip.
Using a heat-insulating material, or a material that is co-wound with a heat-insulating material formed in a paper shape at the beginning of winding, or a method in which a heat-insulating material is applied to the surface of a mandrel in advance, and then an insulating object is interposed between the mandrel and the high-temperature strip, such as a material to be wound To protect the mandrel from the high heat of the hot strip.

[0004]

However, the above-mentioned conventional type in which the mandrel is protected from the high heat of the high-temperature strip requires a spool having a special structure, or in the case of using the insulating paper, the insulating paper is used. In this case, a complicated mechanical device for the supply of heat is required, or a separate mechanical device for applying the heat insulating material is required.

In addition, consumables such as heat insulating materials are required, and these heat insulating objects themselves do not have a long life due to the high heat of the high-temperature strip, and are not economically and easily realizable. At present, it does not prevent thermal deformation. In addition, the mandrel itself has a special hole drilled inside and water cooling is performed to prevent thermal deformation, but the mandrel manufacturing cost is economically expensive, but the life is not extended. Is the current situation. Approximately 70 to 80% of the maintenance cost of the hot strip mill factory is spent on coiler maintenance. Among them, the most noticeable is the maintenance cost of the mandrel. The mandrel is used for about 3 months and the segment (mandrel outer cylinder) Was removed and polished again, and then used for about 3 months and discarded. Thus, the total life of the mandrel was about 6 months, and the life was very short.

In recent years, continuous casting and direct rolling of strips have been performed. In this case, the winding time of the high-temperature strip is as long as about 3 minutes to about 30 minutes. In the case of a mandrel that winds for a long time like this, the temperature of the mandrel is almost the same as the temperature of the hot strip, even if the sleeve is provided with a heat insulating effect as in the past or if heat insulation is provided inside the segment. ,
Can not withstand use. In addition, even when the inside of the mandrel has a water-cooled structure, the temperature of the segments outside the mandrel becomes high, and the life of the mandrel is greatly shortened.

[0007] The present invention has been devised to solve such disadvantages of the prior art, and its main purpose is to completely protect the mandrel from high-temperature strips and extend the life of the mandrel. Another object of the present invention is to provide a high-temperature strip winding device that is economical and easy to implement.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, a sleeve fitted to the outside of a mandrel is provided with a large number of cooling fluid grooves which are open at both ends and are concave at the inside diameter. Alternatively, a plurality of cooling fluid holes are provided in the sleeve, and a fluid supply device for supplying a fluid from one of the cooling fluid grooves or the cooling fluid holes is provided. Then, the fluid supply device was provided on the fixed portion of the winding device so as not to rotate with the mandrel around the mandrel.

[0009]

The cooling fluid is supplied from one of the cooling fluid groove or the cooling fluid hole of the sleeve and discharged from the opposite side. Therefore, the sleeve itself is completely cooled, and the heat of the high-temperature strip does not reach the outer surface of the mandrel. Can completely heat protect the mandrel.

[0010] Therefore, the life of the mandrel is greatly improved, and maintenance of the winding device of the present invention can be usually achieved only by replacing the sleeve. And since the fluid supply device does not rotate simultaneously with the mandrel, a special rotary joint used for cooling the inside of the mandrel is not required, and thermal deformation of the mandrel can be prevented by a very simple method.

[0011]

FIG. 1 is a sectional view of a coiler, and FIG. 2 shows a state where a sleeve having an inner diameter groove is inserted outside a mandrel of a coiler and a high-temperature strip is wound. , FIG. 3 shows a part A in FIG. 2, FIG. 4 shows details of the grooved sleeve, FIG. 5 shows another embodiment of the fluid supply device, and FIG. 6 shows details of the holed sleeve.

Reference numeral 1 denotes a hot strip which is wound around a mandrel 3 via a pinch roll 2. A sleeve 4 with an inner diameter groove is inserted outside the mandrel 3, and supplies cooling water 6 to a concave groove 11 of the sleeve 4 with an inner diameter groove by a cooling water header 5 and a cooling water nozzle 13.

The supplied cooling water 6 passes through the concave groove 11 and is discharged from the opposite side of the cooling water header 5. The discharged cooling water is collected by a cooling water collecting device (not shown). As a result, the inner grooved sleeve 4 is completely cooled and the sleeve is maintained at a normal temperature, so that the surface of the mandrel is maintained at a substantially normal temperature and the heat from the high-temperature strip is cut off.

In this embodiment, cooling water is used as a cooling medium, but air or the like may be used in some cases. Since the cooling water header and nozzle are attached to the fixed part of the winding device, they do not rotate together with the mandrel. Therefore, a fluid supply device such as a rotary joint is not required, and a simple structure is required. The sleeve may be a sleeve 10 with a through hole provided with a fluid through hole 12 as shown in FIG. 6 in addition to the concave groove.

Further, as another embodiment of the fluid supply device, as shown in FIG. 5, a seal 8 for sealing between the mandrel 3 and the header 7 and between the sleeve 4 and the header 7 is provided on the cooling water header 7 to cool the cooling water. Cooling water is supplied from the water supply hole 9 to prevent scattering of the cooling water as much as possible.

[0016]

As described above, according to the high-temperature strip winding device of the present invention, the cooling fluid is supplied from one of the cooling fluid groove or the cooling fluid hole of the sleeve and discharged from the opposite side. It is completely cooled and the heat of the hot strip is not transmitted to the outer surface of the mandrel, so that the mandrel is completely thermally protected. As a result, the life of the mandrel is greatly improved, and maintenance of the winding device of the present invention is usually sufficient only by replacing the sleeve.

As described above, not only the life of the mandrel but also the life of the sleeve itself is greatly extended, and the maintenance cost of the hot strip mill line can be reduced. In particular, a remarkable effect is obtained in a long-time high-temperature strip winding device for a strip line directly connected to continuous casting. And
Since the fluid supply device does not rotate at the same time as the mandrel, a special rotary joint used for cooling the inside of the mandrel is unnecessary, and thermal deformation of the mandrel can be prevented by a very simple method.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a coiler as an example of the present invention.

FIG. 2 is a view showing a state in which a sleeve with an inner diameter groove is inserted outside a mandrel of a coiler and a high-temperature strip is wound.

FIG. 3 is a view showing a part A in FIG. 2;

FIG. 4 is a diagram showing details of a grooved sleeve.

FIG. 5 shows another embodiment of the fluid supply device.

FIG. 6 is a diagram showing details of a sleeve with holes.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-temperature strip 2 Pinch roll 3 Mandrel 4 Sleeve with inner diameter groove 5 Cooling water header 6 Cooling water 7 Cooling water header 8 Seal 9 Cooling water supply hole 10 Sleeve with through hole 11 Concave groove 12 Fluid through hole 13 Nozzle 14 Fluid supply device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-130611 (JP, A) JP-A-61-7624 (JP, U) JP-A-56-122508 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) B21C 45/00-49/00 C21D 9/68 B22D 11/06 390

Claims (2)

(57) [Claims] 1. A sleeve which is fitted on the outside of a mandrel and has a plurality of cooling fluid grooves which are open at both ends and which are concave in an inner diameter portion, or a number of cooling fluid holes which are provided in a sleeve, and the cooling fluid grooves are provided. Alternatively, a high-temperature strip winding device provided with a fluid supply device for supplying a fluid from one of the cooling fluid holes. 2. The high-temperature strip winding device according to claim 1, wherein the fluid supply device is provided on a fixed portion of the winding device around the mandrel so as not to rotate together with the mandrel.