JPS61279345A - Belt tensioner of belt type continuous casting device - Google Patents

Abstract

PURPOSE:To obtain an ingot having good quality by providing plural pieces of rolls having the shafts inclining outward with respect to pulley shafts to both ends of steel belts facing each other thereby decreasing the transverse deformation of the belts, decreasing the ruggedness of the ingot surface and preventing double skins. CONSTITUTION:The plural receiving rolls 11, having the shafts inclining outward with respect to the pulley 3, 3a and 4, 4a shafts are disposed between backups 7 in contact with short side molds 6 and the transverse ends of the steel belts 5, 5a and press rolls 9, 9a are disposed to face each other via the belts 5, 5a. The belts 5, 5a receive the transverse force toward the outside from the rolls 9, 9a and 1, 11a having the above-mentioned inclination when belts 5, 5a are moved in the casting direction Z by the driving pulleys 4, 4a. The transverse thermal expansion of the belts 5, 5a is thereby absorbed and the deformation of the belts 5, 5a is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a belt tensioning device for a belt-type continuous casting machine that applies a lateral tensile force to a belt to reduce the amount of deformation of the belt.

(Prior Art) A conventional belt type continuous casting device will be explained based on FIG. 6 (side view of the conventional device) and FIG. 7 (sectional view taken along line A-A in FIG. 6). 3,3
a. Dry pulley 4. da.

The steel belt 5 is wound around a tension pulley 3, a drive pulley 41/(endlessly), and is connected to a power drive device (
(not shown) via the drive pulley 4 in the outward direction (in the direction of the arrow).

Further, a tension pulley 3&, a dry pulley da, a steel belt 5&, etc. are arranged in parallel between the opposing surfaces of the steel belt 5 with a gap corresponding to the thickness T of the slab 2, and the steel belt 5ald, Similarly to the steel belt 5, it rotates outward. In addition, steel belt 5,
A pair of short-side molds 6 for forming the plate width are disposed at both ends of the gap 5a, and the short-side molds 6
A backup 7 is provided at the rear so as to be in contact with the short side mold 6.

(Problems to be Solved by the Invention) In the conventional device described above, the steel bell (5.5a) that receives heat from the molten steel 1 or the slab 2 undergoes thermal expansion in the vertical and horizontal directions, causing elongation. In order to absorb the elongation, a steel bell (5.5a) is pulled by tension pulleys 3, 3a. However, with this method, the steel belt 5. ．． 5
Although the longitudinal elongation of a could be solved, the transverse elongation remained unresolved.

The present inventors have discovered that by solving the amount of lateral deformation of the steel belt, it is possible to produce slabs with good quality, especially with reduced irregularities on the slab surface, and to prevent the occurrence of double skin. The present invention has been completed by discovering the point where the belt tension can be obtained.That is, the present invention has been developed to improve the belt tension in a belt-type continuous casting machine, which reduces the amount of deformation of the belt by applying a horizontal tensile force υ to the belt. The purpose is to provide equipment.

(Means for Solving the Problems) The present invention provides a plurality of rolls having axes inclined outward with respect to the pulley shaft at both ends of each opposing steel belt to absorb the lateral elongation of the belt. This is how it was done.

That is, the present invention provides a belt tensioning device for a belt-type continuous casting machine, in which a plurality of rolls are provided at both ends of the belt, sandwiching the belt and having axes at an angle of inclination θ outward with respect to the pulley shaft. This is a belt tensioning device characterized by:

The present invention will be explained in detail below based on FIGS. 1 to 5. Figure 1 is a side view of a belt-type continuous casting apparatus that is an embodiment of the present invention, Figure 2 is a sectional view taken along the line B-B in Figure 1, and Figure 5 is a
FIG. 4 is a side view of FIG. 5, and FIG. 5 is a sectional view taken along the line CC in FIG. 1.

As shown in FIGS. 1 and 2, the belt-type continuous casting apparatus of the present invention has two tensioners placed facing each other at an arbitrary interval [an interval corresponding to the thickness T of the slab] on the same level. Pulley 5, 3a.

And steel belt 5゜5& on drive pulley a, 4a
is wrapped around the craft/dress. steel bell) 5.
5aO A pair of short side molds 6 for forming the plate width are provided at both ends of the gap, and a backup 7 is provided behind the short side molds 6 so as to be in contact with the short side molds 6. ing.

steel bell) 5. The backup 7 in the width direction on 5a
A plurality of bearings having axes inclined outward with respect to the pulley axis between the width ends of the steel belt 5.5a hold the roll 11, and the bearings are positioned opposite to the roll 11 via the spool bells 5, 5a. A plurality of presser rolls 9 are provided. Arrow 2 indicates the casting direction.

As shown in Figs. 3 and 4, the above supports are fixed to the backup 7 with mounting bolts 17, and are pivotally supported by the roll case 8, with steel bells arranged in a staggered manner on the left and right respectively. 5.5a J/C is provided so as to be in contact with it.

On the other hand, the above Ukekerol 111Ca steel bell) 5.
As shown in FIG. 5, the presser roll 9a, which is in contact with the steel bell 5, 5a, is in contact with the one short side mold 6 through the steel bell) 5, 5a.
They face each other via f. Belt holding device 25 adjustable with spring 22.12a etc. and steel bell on slab 2)
It is connected to the opposing cooling pad frame 16 via 5, 5a, and is pivotally supported at both ends by a roll lowering device 20 including a roll support bolt 13, a stripper 14, a spring 12, and the like.

In the present invention, as described above, the plurality of supports pivotally supported by the roll case 8 on the left and right sides are arranged so that the roll 11 is in contact with the steel bell 5.5a. In addition, a plurality of presser rolls 9 whose both shafts are supported by a roll lowering device 20 placed opposite to each other via a steel bell) 5.5a are attached to a spring 12 or Adjusted with shim 15.

(Function) When the steel belts 5, 5a are pulled and moved in the casting direction ZK by the drive pulley 4.4a, the receiver is arranged so that the roll 11 and the presser roll 9 have an inclination angle θ with respect to the pulley axis. Therefore, the steel belts 5 and 5a absorb the lateral thermal expansion of the steel belts 5 and 5a, and reduce the amount of steam belt deformation. can.

(Effects of the Invention) As described in detail above, the present invention is provided with a plurality of rolls sandwiching the belt at both ends of the belt and having axes at an angle of inclination θ outward with respect to the pulley shaft. Because of this, it is possible to absorb the lateral thermal expansion of the belt and reduce the amount of deformation of the belt.As a result, unevenness on the surface of the slab can be reduced and double skin can be prevented. This produces the effect that slabs of good quality can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view of a belt type continuous casting apparatus which is an embodiment of the present invention, Fig. 2 is a sectional view taken along the line B-B in Fig. 1, and Fig. 3 is a
4 is a side view of FIG. 5, and FIG. 5 is a sectional view taken along the line 0-c in FIG. 1. FIG. 6 is a side view of a conventional belt-type continuous casting apparatus, and FIG. 7 is a cross-sectional view taken along the line A--A in FIG. Sub-Agents 1) Meifuku Agent Ryo Hagiwara - Sub-Agent Atsuo Anzai Figure 3 Figure 6 Figure 7

Claims (1)

[Claims] A belt tensioning device for a belt-type continuous casting device, characterized in that a plurality of rolls are provided at both ends of the belt, sandwiching the belt therebetween and having axes at an angle of inclination θ outward with respect to the pulley shaft. Tension device.