JPH0215303B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention forms a wall surface on the long side by a pair of driven endless metal belts, and forms a wall surface on the short side by a metal block. The present invention relates to a belt cooling drainage sealing device for continuous casting equipment for molten metal, which forms a casting wall surface.

(Prior art and its problems) A thin slab is obtained by continuous casting of molten metal by forming the wall surface on the long side of the casting space by a pair of driven endless metal belts. The technique is disclosed in, for example, Japanese Patent Application Laid-Open No. 54-61036.

However, in the case of these prior arts, in continuous casting equipment in which a pair of driven endless metal belts are used as elements constituting the metal space, cooling of the belts and a secondary cooling zone of the slab are performed. A device that can perform cooling independently and precisely has not yet been disclosed, and this remains a problem.

By the way, the inventors previously proposed a belt-type continuous casting machine shown in FIG. That is, the tension pulley 2, the drive pulley 3, the belt 1 stretched between the steering pulley 4, and the fixed short side slab 5.
This is a belt type continuous casting machine consisting of.

Even with the belt-type continuous casting machine shown in FIG. 1, there were still technical problems to be solved.
That is, although it is necessary to use a large amount of cooling water near the meniscus of the molten metal in the upper part of the casting space, when the hydrostatic pressure pad (closed type pad) 8 structure is used so that the belt 1 is hydrostatically supported by the cooling water. ,
Unless the water pressure within the pad 8 is increased, a large amount of water cannot flow through.

However, near the free surface (meniscus) of the molten metal in the casting space, the static pressure of the molten metal is extremely low, so when water is supplied to pad 8 at high pressure, this hydrostatic pressure causes As a result, compared to the slab thickness defined by the short side metal block 5, the center part in the width direction of the slab, where the hydrostatic pressure of the pad 8 acts more, is relatively thin.

In order to solve this problem, in the belt-type continuous casting machine shown in FIG. 1, the tension pulley 2 and the drive The pulley 3 is of a multi-disc arrangement type, and a jet pipe 6 is passed between the discs, and the open end of the jet pipe 6 is
A cooling method is adopted in which the belt 1 is exposed to the back surface and cooling water is injected thereto.

Since the molten metal static pressure is also high below the vertical center of the casting space, even if the hydrostatic pressure at pad 8 is increased, it can be balanced with the molten metal static pressure, and the variation in slab thickness in the width direction can be reduced. It does not induce uniformity.

By the way, since the slab and the belt 1 are in contact with each other until the moment they leave the casting space, the belt 1 is
It must continue to be cooled until it leaves the lower end of the casting space. At the lower end of the casting space, the belt 1 is wound around the drive pulley 3, and the pad 13 cannot support or cool the belt 1.

The area where the back side of the belt 1 needs to be cooled is from the contact area between the slab and the belt 1, that is, the meniscus, to the horizontal plane including the axis of the drive pulley 3. If the lower end of the casting space is provided with a cooling structure using the closed cooling water pad 8, the back surface of the belt below the pad will not be cooled.

Therefore, the lower end of the casting space is connected to the open pad 1
3, and the system is such that the back surface of the belt 1 is cooled by the cooling water discharged from the pad 13. The above purpose will not be achieved unless the cooling water is discharged onto the belt 1 between the drive pulley 3 and the steering pulley 4 through the annular groove (between the disks) of the drive pulley 3 through the back surface of the belt 1.

However, when using the above-mentioned cooling means for the belt 1 at the lower end of the casting space, the following problems arise.

That is, the belt cooling water flowing out from the jet pipe 6,
The cooling water that flows out from the lower pad 13, passes through the annular groove of the drive pulley 3, and is discharged onto the belt between the drive pulley 3 and the steering pulley 4 is discharged into the space partitioned by the seal plate 15 shown in FIG. However, the belt between the drive pulley 3 and the steering pulley 4 bends under the weight of the cooling water, creating a gap at the contact surface between the seal plate 15 and the belt, and the cooling water is discharged from this gap. There are problems with leakage and not completely draining into the duct.

Moreover, since the cooling water leaking from the gap between the seal plate 15 and the belt is applied to the secondary cooling zone installed directly under the mold, the flow rate of the secondary cooling water that is controlled to cool the slab is unknown. Since secondary cooling water is added to the belt cooling water, it is actually impossible to control the secondary cooling water, which may cause surface cracks due to the quality of the slab, so a complete sealing of the belt cooling water is required. It is being

In Figure 1, 7 is the jet water main water supply pipe, 9, 1
0, 11, 12, and 14 are main water supply pipes for pads, respectively.

(Object of the Invention) The present invention was made with the aim of solving the technical problems in the belt-based continuous casting machine described above.

(Construction and Effect of the Invention) A feature of the present invention is that the long side wall surface is formed by a driven endless metal belt, and the short side wall surface is formed by a metal block, so that the molten metal can be heated. In a continuous casting machine having a casting space, a cooling water pool is formed on the belt between the metal endless belt pulley placed vertically at the lower end of the casting space and the next pulley when viewed in the direction of belt movement. , a seal plate is disposed in contact with both side edges of the belt, and rolls extending in the belt width direction are arranged in multiple stages in the belt traveling direction so as to press the running belt against the lower end surface of the seal plate. This is due to the fact that it was arranged.

This invention will be explained in detail below.

FIG. 2 shows the seal structure of the belt cooling drainage according to the present invention.

In FIG. 2, reference numeral 15 denotes a seal plate, which is located between the drive pulley 3 and the steering pulley 4, and whose lower end surface is located at both side edges of the belt 1 so as to form a cooling water reservoir. It is arranged so as to be in contact with the surface. The side surface of the seal plate 15 is opened and connected to the cooling water discharge duct 16. Reference numeral 17 denotes a frame, which is arranged parallel to and in contact with the surface of the belt 1 between the drive pulley 3 and the steering pulley 4. A plurality of rolls 19 are attached.

A group of rolls 19 rotatably contact the belt 1 between the drive pulley 3 and the steering pulley 4 so as to press the belt 1 against the lower end surface of the seal plate 15, and are attached to the frame 17 via springs 20. The belt 1 between the drive pulley 3 and the steering pulley 4 is elastically attached to the lower end surface of the seal plate 15 by the roll 19.
Pressed in rolling contact.

The sealing device constituted by a plurality of rolls 19 attached to the frame 17 described above is equipped with wheels 18 and placed on rails 22.

Thus, the sealing device is capable of retracting to the right in FIG. 2, for example, when the casting space configuration unit consisting of the belt 1 and each pulley is moved in the belt width direction for replacing the belt 1 or the like.
Numeral 21 is a bolt which functions to align the sealing device and to adjust the pressing force of the rolls 19 group against the belt 1.

In this embodiment, the positioning of the sealing device and the adjustment of the pressing force of the rolls 19 against the belt 1 are performed by a combination of bolts 21 and nuts (not shown) attached to the frame 17. The present invention is not limited to this, and the above-mentioned functions can be replaced by a displacement mechanism such as a fluid pressure cylinder.

In this way, the belt 1 and the lower end surface of the seal plate 15 are maintained in close contact, and the cooling water is completely discharged into the duct 16.

(Effects of the Invention) Since the present invention is constructed and operated as described above, the continuous casting device has a casting space formed by a pair of metal endless belts and a metal block. Not only can the cooling in the secondary cooling zone be better performed, and the equipment can be better maintained, but also the cooling control of the slab in the secondary cooling zone can be performed with high precision.

[Brief explanation of drawings]

Fig. 1 is a front view of a belt-type continuous casting machine with a three-pulley type driving belt on the long side and a metal block on the short side to which the present invention is applied, and Fig. 2 is a sealing device for belt cooling drainage according to the present invention. FIG. 1: Belt, 2: Tension pulley, 3: Drive pulley, 4: Steering pulley, 5: Short side metal block, 6: Jet pipe, 7: Jet pipe main water supply pipe, 8: Sealed pad, 9, 10, 11: Main water supply pipe for pad, 12: Main water supply pipe for pad, 13: Open type pad, 14: Main water supply pipe for pad, 15: Seal plate, 16: Discharge duct, 17: Frame, 1
8: Wheel, 19: Roll, 20: Spring, 21: Bolt, 22: Rail, 23: Fin roll.

Claims (1)

[Claims] 1. Casting is carried out in a continuous casting machine in which a molten metal casting space is formed by forming a wall on the long side by a driven endless metal belt and forming a wall on the short side by a metal block. A sealing plate is brought into contact with both side edges of the belt so as to form a cooling water pool on the belt between the metal endless belt pulley located at the lower end of the space and the next pulley when viewed in the belt traveling direction. Belt type continuous casting characterized in that a plurality of rolls extending in the width direction of the belt are arranged in the belt traveling direction so as to press the running belt against the lower end surface of the seal plate. Machine.