JPH07277474A - Cast piece conveying device - Google Patents

Abstract

PURPOSE:To provide a conveying device which is constituted to reduce an equipment cost and perform rapid conveyance of a cast piece, in a conveyance table arranged on the rear surface side of continuous casting equipment. CONSTITUTION:In a conveyance table for a cast piece 2 for continuous casting equipment, in a case a ratio La/Lb between the maximum length La and the minimum length Lb of the length of a conveyance cast piece is 1.5 or more, the length of a conveyance table consisting of one or more drive units is set to Lb or more and (La+Lb)X0.6 or less. Two or more tables having the length are arranged to effect conveyance control of a cast piece. This constitution reduces a total cost containing a building, shortens a conveyance time, and saves conveyance energy, and improves productivity and also reduces an operation cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab carrier table arranged on the rear side of a continuous casting facility.

[0002]

2. Description of the Related Art In a continuous casting facility, molten steel is continuously cast and cut into a predetermined length, and the cut slabs are successively conveyed. The total length of the continuous casting equipment is several tens of meters from the main body of the continuous casting equipment to the transportation equipment, and depending on the equipment, hundreds of tens of meters, and the amount of equipment including the building becomes enormous.

Therefore, shortening the length of the transfer facility, that is, shortening the length of the slab transfer table constituting the transfer facility is an effective means for reducing the amount of equipment.

In the conventional transport table configuration, in consideration of the transport and retention of the maximum slab length, one table length is about 1.1 times the maximum slab length, and this is one drive control. A system is constructed in which a table is constructed as a unit, and the slabs are successively conveyed by splicing the tables, and this table length and the splicing structure have become a bottleneck in the total length of continuous casting equipment. .

On the other hand, in the continuous casting facility, when the transport facility fails and the cut slab cannot be transported, the continuous casting operation is forced to be interrupted, and unsteady operations such as withdrawal treatment of the end solidified slab in the casting machine body are required. Many production obstacles are caused, such as the occurrence of work, the problem of processing molten steel that could not be cast, and scrapping of drawn slabs. Therefore, when the transport table is constructed, in order to secure a time margin in case of equipment trouble, it has been performed to secure a slab retention space by providing an extra transport table.

[0006]

However, these retention spaces result in an increase in the total length of the transfer facility, which is a factor in increasing the amount of equipment. Further, in continuous casting, since casting is performed at a substantially constant casting speed, the time cycle (outer piece pitch) at which the cut ingot is delivered is the time obtained by dividing the ingot length by the casting speed,
The pitch of the projecting piece becomes the shortest when the casting piece is cut and discharged with the minimum casting piece length.

Therefore, when the maximum and minimum lengths of the cut slabs have a large width, and when short slabs are continuously stripped, an unnecessary empty space is generated on the table, and the length of the building is shortened. Not only was it wasteful, but for a short slab, the traveling distance was long, which wasted time and energy.

The present invention has been made to solve such a problem, and in a continuous casting facility, when the maximum and minimum lengths of cutting slabs have a large width, the length of the slab conveying table is not required. It is an object of the present invention to provide a slab transfer device capable of preventing the occurrence of a large space, reducing the total cost including the building and reducing the slab transfer energy, and further capable of quickly transferring the slab.

[0009]

According to the present invention, in a slab transfer table of a continuous casting facility, a ratio La / Lb of the maximum length La and the minimum length Lb of the slabs to be transferred is 1.5 or more. In addition, the length of the transport table configured by one drive unit is set to Lb or more and (La + Lb) × 0.6 or less, and two tables of that length are continuously arranged to control the transport of the slab. It is a slab conveyance device characterized in that it is configured as described above.

[0010]

According to the present invention, as described above, when the ratio La / Lb of the length of the cast slab to be conveyed to the maximum length La and the minimum length Lb is 1.5 or more, the conveying table constituted by one drive unit. The length is set to Lb or more and (La + Lb) × 0.6 or less, and two tables of that length are continuously arranged to control the transfer of the cast slab.

First, when a slab longer than (La + Lb) / 2 is discharged after cutting, the slab retention is less likely to occur because the slab pitch is long. Therefore, the drive system is controlled with the two tables as one table.

When a slab shorter than (La + Lb) / 2 is dispensed, the slab slag may be retained because the slab pitch is short, and the two tables are independently controlled to control the slab transfer. Is to do.

By controlling in this way, it is possible not only to reduce the unnecessary empty space when the slab remains, but also to reduce the total cost including the building length,
It is possible to reduce the transportation energy of slabs and quickly transport slabs.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 (a) and 1 (b) are a side view (a) and a plan view (b) showing an outline of the entire continuous casting facility.
In the figure, the molten steel poured into the mold 1 is solidified by the continuous casting machine body 4, and the solidified slab 2a is a cutter 3
Is cut into a predetermined length.

The cut slab 2 is transported to the downstream side by the transport table 5. In the case of the present embodiment, the cut slab 2 is laterally moved by the transfer equipment 6 and the transfer table 5 provided on the downstream side of the transfer equipment 6.
It is transferred to a and is further transported to the downstream side.

FIG. 2 is a side view (a) and a plan view (b) showing the structure of a commonly used transport table and a power transmission mechanism.
And the drive mechanism. In this case, the most downstream roll 1
0 is driven by the motor 7, and the driving force is transmitted by the sprocket 8 and the chain 9 provided at the shaft end of the roll 10.

Further, each table is provided with a slab presence detection sensor 11 for detecting whether or not a slab exists on the table. For this sensor, a method of detecting the presence of goods by turning on / off the passage of light, a method of detecting the presence of goods by magnetism, etc. are usually used.

The slab conveyance control is carried out when the slab 2 is carried to the table 5 by detecting the presence of the slab by a sensor and the sensor of the next table is operating. The cast slab 2 is stopped at the table, and is retained until the next table becomes empty (that is, until the slab load detection sensor 11 is turned off).

Then, the slab presence detection sensor of the next table is turned off, and the table and the next table are simultaneously driven to convey the slab to the next table. If the sensor of the next table is not operating when the slab is brought to the table, the next table is considered to be an empty table and the next table is driven together with the slab 2 by driving the slab 2. Then, control is carried out to convey to the next table.

FIG. 3 shows a comparison between the embodiment of the present invention and the conventional method.

FIGS. 3A and 3B show an apparatus constructed on the basis of the conventional idea of the length of the transport table.
The figure (a) shows the state where the slab 2 with the maximum length La stays on the conveyance table 5, and the figure (b) shows the state where the slab 2 with the minimum length Lb stays. In this case, one unit of the transport table is composed of five rolls, and one slab 2 is allowed to stay on one table.

FIGS. 3C and 3D show an apparatus based on the concept of the transport table length according to the present invention. In FIG. 3C, the slab 2 having the maximum length La stays on the transport table 5. FIG. 3D shows a state in which the slab 2 having the minimum length Lb is retained.

According to the present invention, the value of length (La + Lb) × 0.6 as the length of the cast piece is stored as a reference value in the control device and exceeds the reference value as shown in FIG. When the length of slab is conveyed, the control device compares the reference value with the length of the slab to be conveyed and recognizes that the length exceeds the reference value. The table 2 is recognized and simultaneously driven and simultaneously stopped, and the conveyance control of the slab 2 is performed based on the table drive control method described above.

Further, as shown in FIG. 3D, in the case of a slab shorter than the reference value, the drive control is performed for each table as in the conventional case, and the slab conveyance control is performed. Then, as shown between FIG. 3B and FIG. 3C, the length Δa of the conveyance table is shown.
Therefore, it is possible to reduce the length of the transport table, the length of the building, the transport time, and the transport energy.

Although an example in which one unit of the transport table is five rolls has been described here, the number of rolls is not limited to five, and when determining the length of one transport table 5. It is also necessary to consider the influence of the roll pitch, which is determined by the span of the building and the facility arrangement, by providing a gap of several% between the slabs when the slabs 2 having the maximum length are retained on each table 5.

[0027]

As described above, according to the slab carrier of the present invention, not only can the entire length of the slab carrier of continuous casting equipment be shortened, but also the building cost, the earth building cost, and the carrier table. It is possible to reduce the total cost, including the equipment cost, including the building, shorten the slab transportation time and the transportation energy, and improve productivity and operating costs.

[Brief description of drawings]

FIG. 1 shows an outline of the entire continuous casting facility, (a) is a side view and (b) is a plan view.

2A and 2B show a general configuration of a transport table and a power transmission mechanism, wherein FIG. 2A is a side view and FIG. 2B is a plan view.

FIG. 3 shows a comparison between an example of the present invention and a conventional method.
FIG. 6B is a side view showing an example of a conventional transport device based on the idea of the length of the transport table, and FIGS. 7C and 7D are side views showing an example of the transport device based on the idea of the length of the transport table of the present invention. .

[Explanation of symbols]

 1 Mold 2, 2a, 2b Cast slab 3 Cutter 4 Continuous casting machine body 5, 5a Transfer table 6 Transfer equipment 7 Drive reduction gear motor 8 Sprocket 9 Chain 10 Roll 11 Cast slab presence detection sensor

Claims (1)

[Claims] 1. In a slab transfer table of a continuous casting facility, when the ratio La / Lb of the maximum slab length to be transported and the minimum slab length La / Lb is 1.5 or more, one driving unit is used. The length of the carrying table is Lb or more, (L
a slab conveying device, characterized in that it is a + Lb) × 0.6 or less, and two slabs of that length are continuously arranged to control slab transportation.