JP3079351B2 - Scrap transport system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for transporting and storing scrap used as a raw material in the electric furnace industry.

[0002]

2. Description of the Related Art FIG. 5 shows a scrap conveying system in a scrap yard of a conventional electric furnace type steel making facility.
The scrap as a raw material is transported to a receiving yard 53 near a scrap yard 52 by a truck, dump truck, trailer, or the like (hereinafter, referred to as a truck) 51.
The scrap yard 52 is divided into two zones (buildings) 52-1 and 52-2 in the vertical direction in the figure, and the scrap loaded on the truck 51 is loaded with cranes 53-1 and 53- 2,53-3,53
-4 is received from the truck 51 into the scrap yard 52. This step is called a scrap receiving step.

[0003] Further, scraps in the scrap yard 52 are loaded into a scrap basket 55 by a crane 53-1 to 53-4 at a payout portion 54 provided at an intermediate portion of the scrap yard 52. The scrap basket 55 is mounted on a transport trolley 56, and the scrap is supplied to an electric furnace (not shown) by running the transport trolley 56 on a rail 57 laid in an intermediate portion of the scrap yard 52. This step is called a scrap dispensing step.

Here, loading of scrap into the scrap basket 55 can be automated. However, since the scrap processing on the truck 51 cannot be automated due to the relationship between the outer dimensions of the lifting magnet and the width of the truck bed, the crane 53-
An operator for operating 1 to 53-4 is required. In addition, since the scrap is once received in the scrap yard and paid out from the scrap yard to the scrap basket, the lifting operation and the release operation of the lifting magnet must be performed twice from receiving to paying out. The distance to the cranes was long, and the travel distance of the crane was inevitably long.

Further, since the electric furnace is operated 24 hours a day, the scrap discharging process is also operated 24 hours. In contrast, the scrap receiving process is generally operated for 12 to 16 hours a day, and the paying process overlaps with the receiving process for 8 to 12 hours a day.

[0006]

As described above, in the conventional scrap conveying system, since the crane is used for both the scrap receiving process and the scrap discharging process, their abilities are determined in consideration of the scrap receiving process. Is done.

[0007] By the way, looking at the relationship between the required capacity and the number of cranes, in the scrap receiving process, usually,
It is necessary to carry out scrap discharging in parallel, and at least two cranes having a capacity of 1.5 to 2 times the capacity of the scrap discharging process alone are required for each zone. However, in reality, there are many time periods of only the scrap discharging process that requires only a low capacity, and during this time, the scrap transport system is inefficient.

In each zone of the scrap yard,
Since two cranes are used, it is necessary to pay attention to collision of two cranes in the same zone when manually operating the cranes. On the other hand, when the cranes are automatically operated, operation management of two cranes in the same zone is required. However, in consideration of such operation management, considerable time loss occurs due to interference between the two cranes, and it has been substantially difficult to automate.

On the other hand, the inventor of the present application uses only one crane in one zone of the scrap yard, thereby enabling semi-automatic operation of the crane and improving the efficiency of scrap receiving and dispensing work. (Japanese Patent Application No. 6-301148) has proposed a scrap transport system capable of improving the payout capacity.

[0010] An object of the present invention is to provide a scrap transport system which can improve the scrap transport system proposed above and further improve the receiving and paying-out capability.

[0011]

According to the present invention SUMMARY OF], the track carrying lane truck loaded with scrap are carried, are arranged on both sides of the track transporting lane scratcher
A temporary storage yard for temporarily storing the scraps, at least one scrap yard provided on the side opposite to the truck loading lane of the scrap temporary yard, and a track laid between the truck loading lane and the electric furnace. A basket movably provided above, a dispensing hopper disposed above the track adjacent to the truck loading lane for supplying scrap to the basket, the truck loading lane and the dispensing hopper, A scrap conveying crane movably disposed above a range including the scrap yard, the scrap conveying crane includes a lifting magnet capable of lifting and lowering, and an upper end of the scrap temporary storage yard. A receiving port of the dispensing hopper, and Each truck bed of the above,
So that they are at approximately the same height, and
Receiving scrap from the truck loading lane
From the truck loading lane to the scrap temporary storage yard
To and from the truck loading lane
And dispensing to the hopper, and while the electric furnace is closed,
Scrap from the truck loading lane
From the truck loading lane
And from the truck loading lane
Acceptance at the scrap yard
Transfer from the temporary storage yard to the scrap yard
During the operation of the electric furnace and the scrap
Day and there is no acceptance from the truck loading lane
Is the scrap dispensing in the middle of the scrap temporary storage yard?
From the electric furnace.
Scraps during operation and on days when there is no scrap acceptance work
The dispensing is carried out from the scrap yard by the dispensing
A scrap transport system is provided , wherein payout to a par is performed .

[0012] The scrap transporting crane includes:
It may have two lifting magnets that can be wound up and down independently.

[0013] In the scrap transporting crane, the lifting and lowering of the lifting magnet on the track and the scrap suction operation are performed by manual operation, and the lifting magnet travels to the scrap temporary storage yard. The scrap release operation on the scrap temporary storage yard and the return traveling from the scrap temporary storage yard to the truck are performed by automatic driving.

[0014]

The scrap transporting crane moves above a range including a truck loading lane, a payout hopper, and a scrap yard to receive and pay out scraps. At this time, since the upper end of the scrap temporary storage yard, the receiving port of the dispensing hopper, and the truck bed on the truck loading lane are almost at the same height,
The lifting and lowering steps of the lifting magnet associated with the scrap receiving and dispensing are shortened, and the receiving and dispensing ability is improved accordingly.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of the scrap transport system of the present invention. When a truck 12 loaded with scraps 11 arrives at a factory, a truck waiting area 13
Prior to entry, the trucks 12 are weighed one by one by a truck scale 15 of a weighing station 14. This measurement data is input to a scrap yard management computer (not shown) described later. Next, the waiting trucks 12 are sequentially moved, and usually two trucks 12 are arranged in parallel in the truck loading lane 16.

On both sides of the truck loading lane 16, scrap temporary storage yards 17-1 and 17-2 for temporarily storing scrap are arranged. These scrap temporary storage yards 17-1 and 17-2 temporarily store scraps to be received or paid out on the day. In this example, the scrap temporary storage yard 17-1 is divided into three parts, each of which is, for example, pig iron 17-1a, shredder 17-1b, steel scrap 17-1c as shown in FIG.
Different scraps are stored separately.

Similarly, the scrap temporary storage yard 17-2 is divided into three parts, each of which is, as shown in FIG. 2, for example, a new piece 17-2a, a Dalai 17-2b, and a steel scrap 17-2.
c is sorted and stored. At least one of the scrap yards 18-1 and 18-1 is located on the side opposite to the truck loading lane 16 of the scrap temporary storage yards 17-1 and 17-2.
8-2 are provided. A pit is dug at a position adjacent to the truck loading lane 16 between the scrap temporary storage yards 17-1 and 17-2, and a rail 19 is laid toward an electric furnace (not shown). A cart 20 is movably arranged on the rail 19, and a basket 21 for scrap transport is placed on the cart 20. Above the rail 19 between the scrap temporary storage yards 17-1 and 17-2, a dispensing hopper 22 for supplying scrap to the basket 21 is disposed.

Although not shown, a load cell for scrap measurement is installed in the hopper 22, and the bottom of the hopper is opened when a predetermined amount of scrap is supplied. At this time, the basket 21 is waiting under the hopper 22, and a predetermined amount of scrap is transferred (paid) to the basket 21. When the scrap is transferred to the basket 21, the cart 20 transports the basket 21 to a steelmaking yard where an electric furnace (not shown) is arranged.

Scrap temporary storage yards 17-1 and 17-2
Above the scrap yards 18-1 and 18-2, a pair of right and left extending over the two scrap temporary storage yards 17-1 and 17-2 and the scrap yards 18-1 and 18-2. An automatic overhead traveling crane 24 for transporting scraps is arranged so as to be movable along the overhead rail 23. The automatic overhead crane 24 is lifted and lowered by two winches 25-1 and 25-2 that can be independently wound up and down, and has lifting magnets 26-1 and 26-2 for sucking / releasing scrap. The automatic overhead crane 24 is also used for receiving / dispensing scrap.

Although not shown, the scrap transport system includes automatic operation control of the automatic overhead traveling crane 24, management of reception of the truck 12, and provisional storage of the scrap yards 17-1, 17-2 and 18-2.
A computer for managing the scrap yard for managing the inventory of the scraps 11 stored in 1, 18-2 is installed.

According to the present invention, in addition to the above configuration, the upper ends of the scrap temporary storage yards 17-1 and 17-2, the receiving port of the dispensing hopper 22, and the loading platform of the truck 12 on the truck loading lane 16 are respectively provided. It is characterized in that it is located at substantially the same height. Here, the substantially same height position means that the height of the lifting magnet is adjusted outside a range in which the lifting and lowering of the lifting magnet need not be individually controlled, and a deviation of about 20 cm or less is allowed.

In this way, when the height difference of each part is eliminated,
As will be described later, for example, when transferring scrap from the truck 12 to the scrap temporary storage yard 17-2, the automatic overhead crane 24 uses the lifting magnets 26-1, 26.
-2 The winding up and down distance is shortened. This means that the traveling time between the truck 12 and the temporary scrap yard 17-2 is reduced, and the scrap receiving capacity is improved. This is the truck 12 and hopper 22
And the scrap storage yard 17-2 and hopper 2
The same applies to the case of No. 2, which means that the scrap dispensing ability is improved.

The scrap temporary storage yard 17-1, 1
In order to realize the above configuration without reducing the capacity of 7-2, as shown by a broken line in FIG.
It is conceivable to dig portions below the ground at 7-1 and 17-2 to form pits. On the other hand, when increasing the height of the surrounding walls of the scrap temporary storage yards 17-1 and 17-2 without excavating the pits, it is conceivable to raise the road surface of the truck loading lane 16.

Next, the operation of the thus constructed scrap transport system of the present invention will be described with reference to FIGS. FIG. 3 is a material flow chart showing the flow of scrap in the scrap transport system of the present invention. First, in step 31, scrap is accumulated by a scrap trader. When the trucks loaded with the accumulated scraps arrive at the factory (step 32), the trucks are weighed one by one by the truck scale 15 of the weighing station 14 (step 33), and then stand by in the truck waiting area 13 (step 34). The waiting trucks 12 sequentially move and are arranged in parallel in the truck loading lane 16 (step 35).

The scrap is transferred from the truck 12 moved to the truck loading lane 16 to a scrap temporary storage yard 17-.
The scrap receiving work to be transferred to 1, 17-2 is performed by semi-automatic operation of the automatic overhead crane 24. As shown in FIG. 2A, the receiving destination of the scrap 11 is as shown in FIG.
Of the temporary storage yards 17-1 and 17-2 (solid arrow A), the dispensing hopper 22 (solid arrow B), and the scrap yards 18-1 and 18-2 (dashed arrow D). is there. Of these, scrap temporary storage yard 1
7-1, 17-2, receiving into the hopper 22 is performed on the operating day of the electric furnace (not shown), direct payout to the hopper 22, and payout from the temporary storage yard to the hopper 22 are based on the type and time of scrap. The selection is appropriately performed appropriately in relation to the series. On the other hand, on the day when the operation of the electric furnace is stopped, only the receiving operation is performed.
Acceptance and storage. On the day when the electric furnace is closed, the scrap yards 18-1 and 18 of the scrap received in the scrap temporary storage yards 17-1 and 17-2 are also provided.
Receiving at -2 (dashed arrow C) is also performed as needed.

[0026] Of the arrows in Fig. 2 (A), solid arrows indicate scrap movement paths performed on the day when the scrap dispensing operation is performed. On the other hand, the dashed arrow indicates a scrap movement path performed on a day when the scrap payout operation is not performed. These scrap receiving (dispensing) operations are shown in steps 36, 37 and 38 in FIG.

Next, the operation of discharging the scrap to the hopper 22 by the automatic overhead traveling crane 24 is shown in FIG. 2 (B). This dispensing operation is performed on the day when the scrap receiving operation is performed.
2 to (solid arrow E) and the scrap yard 18-
1, 18-2 (dashed arrow F). In these dispensing operations, the automatic overhead traveling crane 24 shown in FIG.
The lifting magnets 26-1 and 26-2 driven by the motors 1 and 25-2 move together to adsorb and release the scrap, so that a large amount of scrap can be dispensed at one time.

Therefore, when a predetermined amount of scrap is put into the hopper 22, the bottom of the hopper is opened and the hopper 22 is transferred (paid out) to the basket 21 waiting below the hopper 22, as described above. 3 step 39). Then, when the scrap is transferred to the basket 21, the carriage 20 transports the basket 21 to the position of the steel yard where the electric furnace (not shown) is arranged (Step 40 in FIG. 3).

FIG. 4 is an operation flowchart for explaining the operation of the automatic overhead traveling crane 24 during the scrap receiving operation. The process of FIG. 4 is a partial cross-sectional view taken along the dashed-dotted line AA of FIG. 1, and includes two trucks 12-1 and 12-2 loaded with scrap, a truck loading lane 16, a scrap temporary storage yard 17-1, 17-2 and lifting magnet 26- of automatic overhead crane 24 (FIG. 1)
1, 26-2 are shown. The automatic overhead crane 24 first moves the lifting magnets 26-1 and 26-2 from the position shown by the broken line to the position above the two trucks 12-1 and 12-2 shown by the solid line as shown in the process of FIG. Move horizontally.

In FIG. 4, the lifting magnet 2 is used.
The distance between 6-1 and 26-2 is two trucks 12-1 and 1
The intervals are the same as 2-2, but these intervals may be different. In this case, the automatic overhead traveling crane 24 is driven so that the lifting magnet 26-2 is located directly above the truck 12-2.

Next, as shown in the step of FIG. 4, only the lifting magnet 26-2 is lowered to suck the scrap 11 loaded on the truck 12-2. Thereafter, as shown in the process of FIG. 4, the automatic overhead crane 24 moves the lifting magnet 26-2 sucking the scrap 11 to the original height position, that is, the height at which the other lifting magnet 26-1 is on standby. Wind up to position.

Next, as shown in the process of FIG. 4, the automatic overhead traveling crane 24 moves the scrap temporary storage yard 17-
Run horizontally toward 2 and lift the magnet 26-
1, 26-2 is moved. The automatic overhead traveling crane 24 stops running when the lifting magnet 26-1 reaches the truck 12-2. Then, the automatic overhead traveling crane 24 lowers only the lifting magnet 26-1, as shown in the process of FIG.
The scrap 11 loaded in 2 is sucked.

As shown in the process of FIG. 4, the automatic overhead crane 24 winds up the lifting magnet 26-1 sucking the scrap 11 to the height position of the waiting lifting magnet 26-2. Further, as shown in the process of FIG. 4, the automatic overhead crane 24 simultaneously moves the lifting magnets 26-1 and 26-2 to a position above the scrap temporary storage yard 17-2.
Then, as shown in the process of FIG. 4, when both lifting magnets 26-1 and 26-2 reach the position above the scrap temporary storage yard 17-2, the two lifting magnets 26-1 and 26-2 are moved. At the same time, the scraps 11 that have been sucked are stored in the temporary storage yard 17-2. After releasing the scrap 11, the automatic overhead crane 24 simultaneously horizontally moves the lifting magnets 26-1 and 26-2 to return to the position shown in the process of FIG. Then, the operations of the steps (1) to (4) shown in FIG.
2 are all stored in the scrap temporary storage yard 17-2.

After unloading all the scraps 11 from one truck 12-2, the automatic overhead crane 24 removes the scraps 11 loaded on the other truck 12-1 according to the same operation flow as the scrap temporary storage yard 17-. 1
(Or 17-2). Automatic overhead crane 24 in the case of receiving into scrap temporary storage yard 17-1
Is performed by lifting magnets 26-1 and 26-2.
4 except for the direction of movement and the order of lowering, hoisting, and suction during suction of the scrap 11 of the truck 12-1.
Since the operation is almost the same as that shown in FIG.

By the way, in the above operation, as is apparent from FIG. 4, the heights of the cargo beds of the trucks 12-1 and 12-2 and the upper ends of the surrounding walls of the scrap temporary storage yards 17-1 and 17-2. Height is the same. From this, the trucks 12-1 and 12-2 and the scrap temporary storage yard 17
-1 and 17-2 can be moved only horizontally, and the lifting magnets 26-1 and 26-2 are wound up,
The lowering is performed by a minimum distance required for sucking the scrap. Therefore, the moving time between the trucks 12-1 and 12-2 and the scrap temporary storage yards 17-1 and 17-2 is reduced, and the receiving capacity is greatly improved.

In the above operation, the automatic overhead traveling crane 24 is operated semi-automatically. That is, the lifting magnets 26-1, 2
The lifting and lowering of 6-2, the position change traveling (the process of FIG. 4) and the scrap suction operation are manually operated. For this manual operation, a driver's cab is installed at a position where the state of the scrap can be easily checked on the building side, and the driving operation is performed while visually checking the scrap.

On the other hand, the lifting magnet 26-1,
The traveling to the scrap storage yard 26-2 in the process of FIG. 4 of 26-2, the scrap releasing operation on the scrap storage yard 17-2 in the process of FIG. 4, and the scrap temporary yard 17-2 in the process of FIG. The return traveling from above to the tracks 12-1 and 12-2 can be performed automatically. Also, the automatic overhead traveling crane 24 automatically operates the scrap discharging work in the scrap temporary storage yards 17-1 and 17-2 to the hopper 22 described above. The automatic operation is performed by a control unit that performs control under the control of the above-described scrapyard management computer. That is, the control unit stores in advance the running pattern of the automatic overhead traveling crane 24 and the timing of lowering and raising the lifting magnets 26-1 and 26-2, the timing of scrap suction and release. The specification of the automatic driving is performed by pressing a specification button of a traveling pattern to be performed or by an instruction from the scrapyard management computer.

The trucks 12-1 and 12-2 from which all of the scrap 11 has been carried out exit the truck carry-in lane 16, and two new trucks waiting in the truck waiting area 13 enter the truck carry-in lane 16. A similar scrap receiving operation is repeated. Although the above description has been made on the case where the scraps 11 of the trucks 12-1 and 12-2 are received in the scrap temporary storage yards 17-1 and 17-2, the scrap yard 18 as shown in FIG. The operation when receiving -1, 18-2 or directly into the hopper 22 is exactly the same.

In FIG. 1, a pair of scrap temporary storage yards 17-1 and 17-2 are provided on both sides of the truck loading lane 16.
To place these scrap temporary storage yards 17-1, 1
Although an example in which 7-2 is operated by one automatic overhead crane for both receiving and paying out is shown, the number of temporary storage yards may be not only one pair but also two or more pairs. For example, in the case of two pairs, one automatic overhead traveling crane is provided for each pair of scrap yards, one of which is semi-automatic operation on the receiving side, and the other is automatic operation on the payout side. In any case, according to the present invention, only one automatic overhead crane is required for a pair of scrap yards, so that the number of operators can be reduced as compared with the case where two automatic overhead cranes are used for one yard as shown in FIG.

The automatic overhead crane has two lifting magnets, and collectively arranges a truck loading lane 16, scrap temporary storage yards 17-1 and 17-2, scrap yards 18-1 and 18-2, and a hopper 22. Therefore, it is possible to increase the amount of scrap adsorbed at one time and to reduce the cycle time by reducing the transport distance and the transport time, that is, to improve the scrap receiving and paying ability.

[0041]

According to the present invention described above, the truck loading lane, the scrap temporary storage yard, the basket and its moving mechanism, and the dispensing hopper are concentrated, so that one scrap per yard. An automatic overhead traveling crane can accept and pay out scraps, reduce the number of workers, and directly or temporarily dispose of the received scrap without temporarily storing it. Therefore, work efficiency and equipment capacity can be greatly improved.

Further, the automatic overhead crane used in the present invention is provided with two lifting magnets, and can operate the two lifting magnets independently at the time of sucking and loading the scrap from the truck. Therefore, a large amount of scrap can be received simultaneously by one crane, the number of cranes can be reduced, the problem of crane interference is reduced, and the working efficiency is greatly improved.

Further, the upper end of the scrap temporary storage yard, the receiving port of the dispensing hopper, and the truck bed on the truck carry-in lane are all located at substantially the same height position. The lifting and lowering distances of the lifting magnet can be shortened, and the receiving and paying ability can be improved by that time, and the control thereof can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a scrap transport system of the present invention.

FIG. 2 is a material flow diagram showing a flow of scrap in the scrap transport system of the present invention.

FIG. 3 is a work flowchart showing a flow of a scrap receiving operation and a discharging operation by the scrap transport system of the present invention.

FIG. 4 is an operation flowchart for explaining an operation of the automatic overhead traveling crane for scrap transportation during a scrap receiving operation by the scrap transportation system of the present invention.

FIG. 5 is a plan view showing an example of a conventional scrap transport system.

[Explanation of symbols]

12: Truck 13: Truck waiting area 14: Weighing station 15: Truck scale 16: Truck loading lane 17-1, 17-2: Scrap temporary yard 18-1, 18-2: Scrap yard 19: Rail 20: Dolly 21 : Scrap transport basket 22: Discharge hopper

──────────────────────────────────────────────────続 き Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 63/00-63/06 C22B 1/00

Claims (3)

(57) [Claims] 1. A truck loading lane into which a truck loaded with scraps is loaded , and one scrap disposed on both sides of the truck loading lane.
Laying trajectory between the scrap Kari置yard for storing, at least one scrap yard is provided on the side opposite to the track carrying lanes of this scrap Kari置yards, the previous SL track transporting lane and EAF at a basket arranged on the movable, a payout hopper that is disposed on top of the track adjacent to the track carrying lane to supply scrap this basket, for the before and SL track transporting lane payout and a upper scrap transport crane which is arranged movably in the range including a hopper and the scrap yard, pre Symbol scrap conveying crane hoisting, comprising a winding lowering possible lifting magnet, before Symbol scrap provisionally At the upper end of the storage yard, at the receiving port of the dispensing hopper, and on the truck loading lane. Each bed of rack, as almost the same height, from the track carrying lane during operation of the electric furnace
The scrap is accepted before the truck loading lane.
Receiving in the scrap temporary storage yard and the truck
Discharge from the carry-in lane to the dispenser hopper
From the truck loading lane while the electric furnace is closed
The scrap is accepted before the truck loading lane.
Receiving in the scrap temporary storage yard and the truck
Acceptance from the loading lane to the scrap yard
The scrap from the temporary storage yard
Transfer to the yard, during the operation of the electric furnace, and on the day when scrap is received
And there is no reception from the truck loading lane
The scrap payout is before the scrap temporary storage yard
Discharge to the hopper for recording and dispensing, and operate the electric furnace
Scrap payment on medium days and no scrap reception
Take out the scrap yard from the scrap yard
A scrap conveying system characterized in that the scrap is paid out . 2. The scrap transport system according to claim 1, wherein the scrap transport crane has two lifting magnets that can be independently lifted and lowered. 3. The scrap transport system according to claim 1, wherein in the scrap transport crane, the lifting and lowering of the lifting magnet on the track and the scrap suction operation are performed by manual operation. The scrap is characterized in that the running of the lifting magnet to the scrap temporary storage yard, the scrap releasing operation on the scrap temporary storage yard, and the return travel from the scrap temporary storage yard to the truck are performed by automatic driving. Transport system.