JP2656716B2 - Equipment for cooling and storing hot-rolled coils - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for cooling and storing a hot-rolled coil, and dispensing the coil according to a processing command from the next step.

[0002]

2. Description of the Related Art A coil which has been hot-rolled is divided into a coil which is cooled by air and goes to a refining line (a hot rolled material) and a coil which is water-cooled and goes to a cold rolling step (a cold rolled material). It is paid out according to the processing order from the process. Conventionally, such equipment for cooling and storing hot-rolled coils is arranged, for example, as shown in FIG.

That is, the hot-rolled steel strip that has been finish-rolled by the finishing mill 11 of the hot rolling line 1 is wound into a coil by the winder 12. The temperature of the hot-rolled coil is 450 to 800 ° C., and the conveyors 21 and 22
Cooled and distributed to 5 to 6 yards 31 to 35 in parallel
Will be kept. The Hiyanobezai, after being cooled is conveyed in liquid-cooled storage yard 41 at one end of the conveyor 22 and crane K ₁₁ through each yard 31 to 35, by directly stored or conveyors 22, 23, air-cooled storage yard 42, storage yard 43, and are arranged distributed in the storage and shipping yard 44, appropriate conveyor 22-24 and cranes K _11, K _12, K ₁₃ and Noritsui by example first in accordance with the processing instructions of the cold rolling, It is paid out from the other end of the second yard 31, 32 by the trailer 51 or the like.

[0004] In addition, the hot rolled external sales material is conveyed to the conveyor 22 and the clay.
K₁₁Air cooling / storage yard for each yard 31-35
After being transported to the air conditioner 42 and cooled by air, it is stored or
The storage yard 43 and the storage
Distributed to the shipping yard 44 and processed in the refining line
Conveyors 22 to 24 and crane K₁₁,
K ₁₂, K₁₃, Skin pass line 61, pickpocket
It is conveyed to the pickling line 62 and the pickling line 63. Each line
The coil that has been processed in
It is distributed to the pipe / shipping yard 44,
Lane K₁₂, K₁₃Carried to the packing line 71 by
If trailer 5 from the end of the third and fourth yards 33 and 34
Shipped in 2 mag.

[0005]

However, in the conventional equipment arrangement, the air-cooling / storage yard 42 and the storage yard 43 are adjacent to each other, or the air-cooling / storage yard 42 has the air-cooled coil and the cooled cooling yard. Since a coil waiting for a command from a process is juxtaposed, heat from the coil being air-cooled is transmitted, and the cooled coil is heated, so that the air-cooling time becomes longer. In addition, when a processing command is issued from the next process after cooling, it is necessary to transfer the coils in the order of the commands by connecting a conveyor or a crane, and it takes a long time to transport to the next process. In addition, it is necessary to rearrange the coil in the yard or to another yard in order to carry the coil in the order of command, and the number of movements of the coil increases, so that the coil is scratched during handling or the coil is placed on a skid or the like. In such a case, there is a problem that the quality of the steel strip may be impaired due to the occurrence of press flaws or the like.

The present invention has been made in view of such problems of the prior art, and is a facility for cooling and storing a hot-rolled coil and paying it out according to a processing instruction from the next step. In order to provide a facility for cooling and storing a hot-rolled coil in which the time required for transporting the coil is reduced, the number of times of movement of the coil is small, and heat is not given to the cooled coil from the coil being cooled. Aim.

[0007]

In order to achieve the above object, the present invention provides a method of cooling and storing a hot-rolled coil,
In a facility for dispensing according to a processing instruction from the next step, among the coils, an air-cooled yard for air-cooling a coil going to a hot rolling refinement line, a water-cooling yard for water-cooling a coil going to a cold rolling step, A warehouse for storing the finished coils, a first transfer device directly connecting the warehouse, each cooling yard, and the upstream side of the refining line, a downstream side of the warehouse and the refining line, and a payout yard. A cooling and storage facility for a hot-rolled coil, comprising: a second transfer device that directly connects the coils.

[0008]

According to the present invention, by providing a warehouse for storing coils cooled in the air-cooled yard and the water-cooled yard, the cooling yard and the storage yard are isolated, so that no heat is applied to the cooled coils. In addition, since the warehouse and each of the cooling yards and the upstream side of the refining line, and the warehouse and the downstream side of the refining line and the payout yard are directly connected by transporting devices, respectively, a conventional conveyor or The time required for the transfer of the coil can be shortened as compared with the case of connecting the cranes. Furthermore, if the cooled coil and the coil waiting for the next process are stored and managed at a predetermined position in the warehouse, the number of times of movement of the coil can be reduced as compared with the related art.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing the equipment of this embodiment. Two rectangular yards 3 on the side of the hot rolling line 1
a, 3b were formed in parallel, and a conveyor 21 extending in the longitudinal direction of the yards 3a, 3b was installed between the hot rolling line 1 and the first yard 3a. Each of the yards 3a and 3b is divided into two in the longitudinal direction, and the winder 12 side of the hot rolling line 1 is formed as a water cooling yard 4A, and the opposite side is formed as an air cooling yard 4B. The cranes K ₁ and K ₂ are installed above the water-cooled yard 4A and the air-cooled yard 4B, and are branched at a right angle from the conveyor 21 between the water-cooled yard 4A and the air-cooled yard 4B, from the first yard 3a to the second yard. Conveyor 2a heading to 3b is provided at the end of air-cooling yard 4B opposite to the water-cooling yard side, and conveyor 2b which turns at a right angle from the tip of conveyor 21 and heads from first yard 3a to second yard 3b is installed. .

On the second yard 3b side, a three-dimensional warehouse 5, a skin pass line 61, a slitter line 62, and a pickling line 63 are arranged in series from the water cooling yard 4A side in the second yard 3b.
It is installed on the b side. A packing line 71 is provided downstream of the skin pass line 61 and the slitter line 62, and from the middle of the pickling line 63 to the slitter line 6.
A conveyor 2c heading for the second packing line 71 is also provided. Incidentally, R ₁ is rewinding machines of each line entry side, R ₂ is each line exit side tension reel.

[0011] Further, on the upstream side of the three-dimensional warehouse 5, the side of the entrance,
Each upstream side of the skin pass line 61, the slitter line 62, and the pickling line 63, between the water cooling yard 4A of the second yard 3b and the three-dimensional warehouse 5, the air cooling yard 4B and the conveyor 2
a, a loop track 81 is laid between the air-cooled yard 4B of the first yard 3a and the conveyor 21 and between the air-cooled yard 4B and the conveyor 2b. This loop trajectory 81
And a turnable traveling carriage moving along the
This corresponds to the first transport device in the present invention.

Further, a payout yard 9 is formed on the downstream side of the loading / unloading entrance of the three-dimensional warehouse 5, and a crane K
₃ are installed. Then, the downstream side of the three-dimensional warehouse 5 on the side of the loading / unloading entrance, the skin pass line 61 and the slitter line 6
A loop track 82 is laid on the downstream side of each packing line 71 downstream of 2, the halfway side of the pickling line 63, and the three-dimensional warehouse 5 side of the payout yard 9. This loop trajectory 82
And a turnable traveling carriage moving along the
This corresponds to the second transport device in the present invention.

Therefore, the hot-rolled steel strip that has been finish-rolled by the finishing mill 11 of the hot-rolling line 1 is wound into a coil by the winder 12, and the cold-rolled material is conveyed by the conveyors 21 and 2a.
Carried in, is arranged at a predetermined position of the water-cooled yard 4A is water cooled by the crane K _1. Hot rolled external sales material is conveyor 2
Carried by 1, 2b, air yard 4B by crane K ₂
And is air-cooled.

The cooled coil is loaded from a water-cooled yard 4A and an air-cooled yard 4B onto a turnable transport vehicle that moves along a loop track 81 and is loaded into the three-dimensional warehouse 5 from an upstream loading / unloading port. Is stored in the location.
Here, the cold rolled material is loaded on a turnable transport vehicle that moves along the loop track 82 from the downstream loading / unloading entrance of the three-dimensional warehouse 5 and is transported to the payout yard 9 in accordance with the cold rolling processing command. Hot rolled external sales materials are supplied to the refining line (skin pass line 61, slitter line 62, and pickling line 6).
In accordance with the processing instruction of 3), the skin pass line 61 is placed on the transport vehicle that moves along the loop track 81,
It is carried to either the slitter line 62 or the pickling line 63. The coils that have been processed in each line are connected to the slitter line 6 by the conveyor 2c in the case of the pickling line 63.
After being transported to the second packing line 71, it is packed in the packing line 71 and transported to the payout yard 9 by the carrier truck moving along the loop track 82.

[0015] Then, the transported the cold rolled material and hot rolled external sales material dispensing yard 9, trailers 5 by crane K ₃
It is paid out or shipped at 1, 52 or the like. Also, what is returned to the refining line is transported to the downstream loading / unloading entrance of the three-dimensional warehouse 5 by the carriage moving along the loop track 82, and stored in the three-dimensional warehouse 5 as a command waiting coil, and is similar to the above. Orbit 8 according to the processing instruction of the refining line
It is transported to each refining line by a transport trolley moving along 1.

According to this equipment, since the cooling yard and the storage yard are separated by the installation of the three-dimensional warehouse 5 unlike the conventional case, heat is not applied to the cooled coil, so that the air cooling time is shortened and the space is reduced. Many coils can be stored. In addition, by the respective carriages moving along the loop tracks 81 and 82, the three-dimensional warehouse 5, the cooling yards 4A and 4B, and the upstream side of the refinement line, the three-dimensional warehouse 5 and the downstream side of the refining line are connected. Since the connection with the payout yard 9 is directly made, the time required for the transfer can be shortened as compared with the conventional case where a conveyor or a crane is connected.

FIG. 2 is a graph comparing the number of staying days from the winding of a hot-rolled steel strip to the shipment thereof between the equipment A of this embodiment and the equipment B of the conventional example (FIG. 4). It is. As can be seen from this graph, the number of days of stay in the conventional example was an average of 5.4 days with a maximum of 7.6 days and a minimum of 3.3 days.
In the case of this embodiment, the average is 3.9 days with the maximum of 5.0 days and the minimum of 3.0 days, and the air-cooling time is shorter than before and the time required for transportation is also shortened, so that the number of staying days is greatly reduced. ing.

Further, if the cooled coils and the coils waiting for the next process are stored in predetermined positions in the three-dimensional warehouse 5, there is no need to rearrange the coils to carry them in the order of the processing instructions. As a result, scratches, push flaws and the like are less likely to occur on the steel strip. The graph of FIG. 3 shows the number of movements of the coil from the winding of the hot-rolled steel strip to the shipment, between the equipment A of this embodiment and the above-mentioned conventional example (FIG. 4).
This is a comparison with the equipment B of FIG. Here, the number of times the coil was lifted from one position and moved to be lowered to another position was counted as one movement. As can be seen from this graph, in the conventional example, the number was 11.8 times, but decreased to less than half the number of 5.2 times.

[0019]

As described above, according to the present invention, in a facility for cooling and storing a hot-rolled coil and paying it out according to a processing instruction from the next step, the cooled coil is stored. By providing a warehouse for the coil, the air cooling time of the coil becomes shorter than before. In addition, since the warehouse was directly connected to each of the cooling yards and the upstream side of the refining line, and the warehouse and the downstream side of the refining line and the payout yard were each directly connected by a transfer device, the transfer was performed more than conventional equipment. Can be shortened. Furthermore, since the number of times of movement of the coil can be reduced as compared with the conventional case, the steel strip is less likely to have a flaw or a push flaw.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one embodiment of the present invention.

FIG. 2 is a graph comparing the number of staying days from winding of a hot-rolled steel strip to shipping thereof between the facility A of this embodiment and the conventional facility B.

FIG. 3 is a graph comparing the number of times of movement of a coil from winding of a hot-rolled steel strip to shipment thereof between the facility A of this embodiment and the facility B of the conventional example.

FIG. 4 is a schematic plan view showing conventional equipment for cooling and storing a hot-rolled coil.

[Explanation of symbols]

 Reference Signs List 1 hot rolling line 4A water-cooled yard 4B air-cooled yard 5 three-dimensional warehouse 81 loop track (first transfer device) 82 loop track (second transfer device) 9 payout yard

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Zenichiro Muro 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Corporation Chiba Works

Claims (1)

(57) [Claims] 1. A hot-rolled coil is cooled and stored.
In a facility for paying out according to a processing instruction from the next step, an air-cooled yard for air-cooling the coil heading to the hot rolling refinement line among the coils, a water-cooling yard for water-cooling the coil heading for the cold rolling step, and cooling. A warehouse for storing finished coils, a first transfer device directly connecting the warehouse, each cooling yard, and an upstream side of the refining line, a downstream side of the warehouse and the refining line, and a payout yard. A cooling and storage facility for hot-rolled coils, comprising a second transfer device directly connecting the coils.