JPS6238072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in continuous slab casting equipment.

Conventional continuous slab casting equipment is usually configured as shown in FIGS. 1 to 7. In FIG. 1, 1 is a flexible slab 10 to be cast.
The upper endless belt 1 is formed by stretching a metal plate slightly wider than the width of the arrow 1 between the front and rear upper pulleys 3 and 4 in an endless belt shape. The upper pulleys 3 and 4 are driven and rotated in the direction shown in FIG. 2 is a lower endless belt made by stretching a flexible metal plate slightly wider than the width of the slab 10 to be cast between the front and rear lower pulleys 5 and 6; The belt 2 is arranged parallel to the upper endless belt 1, and is driven and rotated in the direction of the arrow by a drive source (not shown) by lower pulleys 5 and 6, which synchronize with the upper endless belt 1 and adjust its running speed. They are now forced to run at the same speed. As shown in FIG. 2, 7 and 7' are left and right side walls disposed on both sides between the upper endless belt 1 and the lower endless belt 2. A continuous casting mold is formed in an area surrounded by the endless belt 2 and having a rectangular cross-sectional shape. Reference numeral 8 denotes a rectifying vessel for molten steel that is fixed at a suitable position at the rear of the lower rear pulley 5, and inside the vessel 8,
Molten steel is injected from a ladle (not shown), and the molten steel in the container 8 is appropriately rectified.
The molten steel stream 9 is supplied to the upstream end of the lower endless belt 2. Reference numeral 11 denotes a number of cooling water pipes connected to a cooling water source (not shown) and arranged inside the upper endless belt 1 and the lower endless belt 2 as shown. The endless belts 1 and 2 are designed to be cooled. (See Fig. 4) In Fig. 7, 13 is a side end pressing block of the upper endless belt 1, and the block 13 is arranged behind the side end of the upper endless belt 1 on the side that contacts the slab. A spring 16 interposed between the cage and the fixed part
Therefore, it is always pressed against both side walls 7, 7',
No gap is formed between the side walls 7, 7' and the side ends of the upper endless belt 1. 1
4 is a side end pressing block of the lower endless belt 2;
The block 14 is disposed behind the side end of the lower endless belt that comes into contact with the slab, and is always supported by a spring 16 interposed between the block 14 and the fixed part.
7', so that no gap is formed between the side walls 7, 7' and the side ends of the lower endless belt 2. Reference numeral 15 denotes a movement prevention member for the side end pressing blocks 13 and 14, which has one end connected to the side end pressing blocks 13 and 14, respectively, and the other end connected to a fixed part, as shown in FIG. The prevention member 15 has the role of preventing the side end pressing blocks 13, 14 from moving as the upper and lower endless belts 1, 2 run.

When the above-mentioned conventional continuous slab casting equipment starts operating, the molten steel supplied from the ladle (not shown) into the straightening vessel 8 becomes a gentle, undisturbed molten steel flow 9 from its discharge port and travels at a predetermined speed. It flows down onto the upper surface of the upstream end of the lower endless belt 2. This molten steel flow 9 continues to spread over the upper surface of the lower endless belt 2 under the action of gravity, and further flows down. In this case, since the flow velocity of the molten steel flow 9 is higher than the moving velocity of the slab 10, the molten steel eventually flows into the mold surrounded by the upper and lower endless belts 1, 2 and the left and right side walls 7, 7'. It will be filled with. In addition, the molten steel filled in the mold moves at the same speed (without slipping) with the running upper endless belt 1 and lower endless belt 2, and also slides on both side walls 7, 7', and moves upward and downward. It is cooled by the endless belts 1 and 2 to sequentially form a solidified shell, and then the slab 10
It is continuously sent out of the mold. In this case, naturally, slippage also occurs between the side walls 7, 7' and the upper and lower endless belts 1, 2. Also, between the left and right side walls 7, 7' and the upper and lower endless belts 1, 2,
As shown in FIG. 5, gaps 10a and 10b are likely to occur, and molten steel enters into these gaps, resulting in fin-like protrusions 10c and 1 at the corners of the slab 10, as shown in FIG.
A problem arises in that 0d remains. Therefore, in order to avoid this, as mentioned earlier, the upper endless belt side end pressing block 13 and the lower endless belt side end pressing block 14 are installed as shown in FIG.

However, in the conventional equipment described above, both ends of the upper and lower endless belts 1 and 2 move while receiving pressure from the back-up mechanism consisting of the side walls 7 and 7' and the pressing blocks 13 and 14. Endless belts 1 and 2 are easily damaged at both end portions and have a short lifespan.

(ii) The tension distribution in the width direction of the upper and lower endless belts 1 and 2 becomes noticeably different, and local sagging (wrinkles with long wavelengths) occurs on the belt surfaces.

(iii) The driving force of the upper and lower endless belts 1 and 2 becomes excessive, and slippage is likely to occur between the drive pulley and the belt. When such slippage occurs, a speed difference occurs between the slab and the belt, causing the slab 10 deteriorates the surface quality of

There were drawbacks such as the following problems.

The present invention was proposed with the aim of eliminating the drawbacks of the above-mentioned conventional equipment, and is provided with two rotatable pulleys that are parallel to each other and run in a predetermined direction at a predetermined speed by a drive source. , in a slab continuous casting equipment consisting of upper and lower endless endless belts made of metal plates that are wider than the slab width, and both side walls formed between the opposite ends of the upper and lower endless endless belts made of metal plates, the front and rear ends are connected, A plurality of side wall components configured to be separable are connected in series to form the above-mentioned both side walls, and these both side walls are moved in the same direction at the running speed of the upper and lower endless belts made of metal plates. When the most downstream side wall component of both side walls is released from the most downstream end of the upper and lower endless belts, it is separated from the succeeding side wall components and transferred to the rear, and the most upstream side wall component of both side walls is released. Before the end of the side wall component is sandwiched between the upstream ends of the upper and lower endless belts, the front end of the side wall component that has been transferred to the rear is transferred to the rear end of the most upstream side wall component. Continuous slab casting equipment characterized in that it is configured such that both side walls consisting of a plurality of side wall components are always formed between both ends of the upper and lower endless belts by being connected to the upper and lower endless belts. It is.

Hereinafter, according to the embodiment shown in FIGS. 8 and 9,
The present invention will be specifically explained.

In FIGS. 8 and 9, reference numerals 114 and 115 refer to advancing side wall components that are laid parallel to each other along the traveling direction of the upper and lower endless belts 120a and 120b on the outside of both ends of the upper and lower endless belts 120a and 120b. rail, 101, 102, 103
are side wall components having the same shape and dimensions that form one side wall between the upper and lower endless belts 120a and 120b, and the lower surface of these elements has the above-mentioned advancement rail 1.
14 is provided, and the end surfaces on the upper and lower endless belt sides are formed flat, and each side wall component 101, 102, 10
The front and rear ends of the belt 3 are configured to be connectable back and forth, and are connected via connectors 111 and 112 to form a series of side walls, and the upper and lower endless belts 1
As belts 20a and 120b run synchronously, they run on rail 114 at the same speed as both endless belts. 106,107,
108 is an upper and lower endless belt 120a, 120b
A side wall component having the same shape and size that forms the other side wall between the two, and the lower surface of these elements is provided with a groove s that slidably engages with the advancement rail 115, and the upper and lower endless belt sides The end faces are formed flat, and each side wall component 106, 107, 10
The front end and rear end of the belt 8 are configured to be connectable back and forth, and are connected via connectors 110 and 113 to form a series of side walls, and the upper and lower endless belts 1
As belts 20a and 120b run synchronously, they run on rail 115 at the same speed as those endless belts. Reference numerals 116 and 117 denote backward rails of side wall components laid outside and parallel to the forward rails 114 and 115, and these backward rails 116 and 117
Each of the side wall components is adapted to run over it. In addition, in Fig. 8, 118, 119
is the tensioned pulley of the lower endless belt 120b,
Reference numeral 121 indicates a rectifying vessel having the same configuration as that of the conventional equipment described above, 112 indicates a molten steel flow, and 123 indicates a slab.

One embodiment of the equipment of the present invention is configured as described above, and when continuously casting slabs (slabs) with this equipment, first, the side wall components 101,
102, 103, 106, 107, 108, etc. are connected in the state shown in FIG. 8, and rails 114,
After forming both side walls that move on the upper and lower endless belts 115, molten steel is supplied from a ladle (not shown) into the rectifying vessel 121, and at the same time, the upper and lower endless belts 120a, 120
Start running b. Then, the upper and lower endless belts 120a, 120b and the side wall component 10
1,102,103 and 106,107,108
A molten steel flow 122 is poured into a mold surrounded by both side walls formed by the mold. Then, the molten steel flow is cooled and solidified, and is sent out in the direction of the arrow as a slab 123. In this case, both side walls consisting of side wall components include the upper and lower endless belts 120a,
Since it moves at the same speed as the slab 120b and the slab 123 and no slipping occurs between the slab 120b and the slab 123, there is no risk of deteriorating the surface quality of the slab 123.

As described above, the upper and lower endless belts 120
The downstreammost side wall component 101,1 of the side wall components of both side walls moving together with a, 120b
06, the subsequent side wall components 102 and 107 are uncoupled, and by an appropriate elevating means (not shown),
The side wall component 10 is placed on the reversing rail 116 and sent rearward, and the side wall component 10 is placed on the reversing rail 116 and sent rearward in advance.
4 is placed on the advancement rail 114 using an appropriate weighting means, and then connected to the rear part of the side wall component 103, and the three side wall components 102, 10
3,104 to form a moving side wall. The most downstream side wall component on the forward rail 114 is connected to the reverse rail 116, and the side wall component on the reverse rail 116 is connected to the most upstream side wall component. By repeating the above, the moving upper and lower endless belts 120a, 120b always consist of three side wall components.
It forms one side wall between.

Similarly, the three side wall components 106, 10
The moving side wall on the forward rail 115 consisting of 7 and 108 is repeatedly divided and connected via the backward rail 117, thereby creating an upper and lower endless belt 120 that moves.
The other side wall between a and 120b is formed.

Therefore, the upper and lower endless belts 120a, 120b running at a predetermined speed, and the endless belts 12
A slab 123 is continuously cast by a mold surrounded by 0a, 120b and both side walls made up of three side wall components that run at the same speed.

Since the continuous slab casting equipment of the present invention has the above-described configuration and operation, the continuous slab casting equipment according to the present invention eliminates the above drawbacks (i) to (iii) of the conventional equipment. This has the practical effect of realizing the following.

[Brief explanation of the drawing]

Figures 1 to 7 are schematic explanatory views of conventional equipment, with Figure 1 being a vertical side view, Figure 2 being a plan view, and Figure 3 being a plan view.
The figure is a view taken along the - line in Fig. 1, Fig. 4 is a sectional view taken along the - line in Fig. 1, Fig. 5 is an enlarged view of the X part in Fig. 3, and Fig. 6 is a shape of the end of the casting side. 7 is an explanatory diagram of the backup mechanism of the upper and lower endless belts, FIGS. 8 and 9 are schematic explanatory diagrams of one embodiment of the present invention, FIG. 8 is a plan view, and FIG. It is a - line arrow view of a figure. In Figures 8 and 9, 101, 102, 1
03,104,105,106,107,10
8,109: Side wall component, 110,111,1
12, 113: Connector, 114, 115: Forward rail, 116, 117: Reverse rail, 120
a: Upper endless belt, 120b: Lower endless belt.

Claims (1)

[Claims] 1 Endless belts made of upper and lower metal plates, which are stretched between two rotatable pulleys and run in a predetermined direction at a predetermined speed by a drive source, parallel to each other and wider than the slab width, and the metal plates above and below. In a continuous slab casting equipment consisting of both side walls formed between both ends of a manufactured endless belt, a plurality of side wall components whose front and rear ends are connected and can be separated are connected in series, and the above-mentioned both sides are connected in series. The two side walls are moved in the same direction at the running speed of the upper and lower endless belts made of metal plates, and the side wall component on the most downstream side of the both side walls is moved on the most downstream side of the upper and lower endless belts. When released from the end, it is separated from the succeeding side wall component and transferred rearward, and the end of the most upstream side wall component of both side walls is sandwiched between the upstream ends of the upper and lower endless belts. By connecting the front end of the side wall component transferred rearward to the rear end of the most upstream side wall component before being inserted, a plurality of 1. A continuous slab casting equipment characterized in that the equipment is configured to form both side walls made up of individual side wall components.