JPH08157071A - Scrap conveying system - Google Patents

Abstract

PURPOSE: To provide a scrap conveying system capable of efficiently averaging the accepting/delivering work of scrap. CONSTITUTION: Scrap temporary yards 17-1, 17-2 are arranged on both sides adjacently to a truck carry-in lane 16 where a truck 12 loaded with scrap 11 is carried in. A basket 21 is mounted on a carriage 20 and can be moved on a rail 19 laid between the truck carry-in lane 16 and an electric furnace. Scrap is fed to the basket 21 from a delivering hopper 22. An automatic ceiling crane 24 is movably arranged above the range including the truck carry-in lane 16, the hopper 22, and the scrap yards, and it is provided with two lifting magnets 26-1, 26--2 capable of being wound-up or wound-down independently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scrap transportation / storage system used as a raw material in the electric furnace industry.

[0002]

2. Description of the Related Art FIG. 5 shows a scrap transportation system in a scrap yard of a conventional electric furnace type steelmaking facility.
Scrap as a raw material is carried to a receiving yard 53 near a scrap yard 52 by a truck, a dump truck, a trailer or the like (hereinafter referred to as a truck) 51.
The scrap yard 52 is divided into two zones (ridges) 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- with lifting magnets. 2, 53-3, 53
Received from truck 51 to scrap yard 52 by -4. This process is called the scrap receiving process.

Further, the scraps in the scrap yard 52 are loaded into the scrap basket 55 by the cranes 53-1 to 53-4 at the payout part 54 provided in the middle part of the scrap yard 52. This scrap basket 55 is mounted on a carrier truck 56, and the scrap is supplied to an electric furnace (not shown) by running the carrier truck 56 on a rail 57 laid in the middle of the scrap yard 52. This process is called a scrap payout process.

Here, the loading of scraps into the scrap basket 55 can be automated. However, since scrap processing on the truck 51 cannot be automated due to the relationship between the outer dimensions of the lifting magnet and the truck bed width, etc., the crane 53-
An operator is required to operate 1 to 53-4. In addition, since scrap is once received in the scrap yard and discharged from the scrap yard to the scrap basket, the lifting magnet must be sucked and released twice each time from receipt to discharge, and the scrap basket must be collected from the receiving yard. The distance to the crane was long, and the traveling distance of the crane was inevitably long.

Further, since the electric furnace operates 24 hours a day, the scrap discharging process also operates 24 hours, while the scrap receiving process generally operates 12 to 16 hours a day. 8-12 hours a day, the receiving process and the payout overlap.

[0006]

As described above, in the conventional scrap transfer system, since the crane is commonly used for both the scrap receiving process and the scrap discharging process, their capacity is determined in consideration of the scrap receiving process. To be done.

Looking at the relationship between the required capacity of cranes and the number of cranes, in the scrap receiving process,
It is necessary to carry out the scrap discharge in parallel, and at least two cranes each having a capacity of 1.5 to 2 times the capacity in the scrap discharge process alone are required for each zone. However, in reality, there are many time zones only for the scrap dispensing process, which requires only low capacity, and during this period, the scrap transport system is inefficient.

Further, in each zone of the scrap yard,
Since two cranes are used, when operating the crane manually, it is necessary to pay attention to the collision of the two cranes in the same zone. Further, when the crane is automatically operated, it is necessary to manage the operation of two cranes in the same zone. However, in consideration of such operation management, a considerable amount of time is lost due to interference between the two cranes, which makes automation practically difficult.

Therefore, an object of the present invention is to enable the semi-automatic operation of the crane by using only one crane in one zone of the scrap yard, and to improve the efficiency and averaging of the scrap receiving / discharging work. An object of the present invention is to provide a scrap transportation system that can be achieved.

[0010]

According to the present invention, a truck loading yard into which a truck loaded with scrap is loaded, scrap temporary yard disposed on both sides of the truck loading yard, and this scrap temporary yard At least one scrap yard provided on the opposite side of the truck loading yard, a basket movably provided on the track laid between the truck loading yard and the electric furnace, and for supplying scrap to the basket A hopper for dispensing arranged above the track adjacent to the truck loading yard, and for scrap transport movably disposed above a range including the truck loading yard, the dispensing hopper, and the scrap yard. The crane for scrap transportation includes a crane and a crane for hoisting and hoisting. Scrap conveying system characterized in that it comprises a capability of lifting magnet is provided.

Incidentally, the scrap transport crane is
It may have two lifting magnets that can be independently wound up and down.

Further, in the scrap transporting crane, hoisting, hoisting, and scrap suction operations of the lifting magnet on the truck are performed by manual operation, and the lifting magnet travels to the scrap temporary yard. The scrap releasing operation on the temporary scrap yard and the return traveling from the temporary scrap yard to the truck are performed by automatic operation.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the scrap transport system of the present invention. When a truck 12 loaded with scrap 11 arrives at the factory, a truck waiting area 13
Before entering, the trucks 12, one by one, are weighed by the truck scale 15 of the weighing station 14 in weight, length and the like. 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.

Temporary scrap storage yards 17-1 and 17-2 for temporarily storing scraps are arranged on both sides of the truck loading lane 16. The scrap temporary storage yards 17-1 and 17-2 temporarily stock the scraps that are to be received or paid out on the day. The scrap temporary storage yard 17-1 is further divided into three, and each of them is, for example, as shown in FIG.
Different scraps such as a, shredder 17-1b, and steel scrap 17-1c are separately stored.

Similarly, the scrap temporary storage yard 17-2 is also divided into three parts, and as shown in FIG. 2, for example, a new section 17-2a, a Dalai 17-2b, and a steel scrap 17-2 are provided.
c is stored separately. Then, at least one scrap yard 18-1, 1 is provided on the side opposite to the truck loading lane 16 of the temporary scrap yard 17-1, 17-2.
8-2 is provided. Further, a rail 19 is laid toward the electric furnace (not shown) at a position adjacent to the truck loading lane 16 between the temporary scrap yard 17-1 and 17-2. A carriage 20 is movably arranged on the rail 19, and a scrap transport basket 21 is placed on the carriage 20. A hopper 22 for paying out for supplying scrap to the basket 21 is arranged above the rail 19 between the temporary scrap yard 17-1 and 17-2.

Although not shown, a load cell for scrap measurement is installed in the hopper 22, and the bottom of the hopper opens when a specified amount of scrap is loaded. At this time, the basket 21 stands by under the hopper 22, and a predetermined amount of scrap is transferred (dispensed) to the basket 21. When the scrap is transferred to the basket 21, the carriage 20 conveys the basket 21 to a steelmaking yard where an electric furnace (not shown) is arranged.

Temporary scrap yard 17-1, 17-2
Also, above the scrap yards 18-1 and 18-2, a pair of left and right extending over the two temporary scrap yard 17-1 and 17-2 and the scrap yard 18-1 and 18-2 is provided. An automatic overhead crane 24 for scrap transportation is arranged so as to be movable along the ceiling rail 23 of the above. The automatic overhead crane 24 is equipped with lifting magnets 26-1 and 26-2 for sucking / releasing scrap as well as lifting and lowering by two winches 25-1 and 25-2 which can be independently hoisted and lowered. The automatic overhead crane 24 is also used for receiving / discharging scrap.

Although not shown in the figure, the scrap transport system includes automatic operation control of the automatic overhead crane 24, acceptance management of the truck 12, and temporary scrap yard 17-1, 17-2 and scrap yard 18-.
A scrap yard management computer for carrying out inventory management of the scraps 11 stored in Nos. 1 and 18-2 is installed.

Next, the operation of the scrap transport system of the present invention thus constructed will be described with reference to FIGS. FIG. 3 is a material flow diagram showing the flow of scrap in the scrap transport system of the present invention. First, in step 31, scraps are collected by a scrap trader. When the truck loaded with the accumulated scrap arrives 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 are sequentially moved, and two trucks are arranged in parallel in the truck loading lane 16 (step 35).

Scrap temporary storage yard 17 for scrap from the truck 12 loaded into the truck loading lane 16
The scrap receiving work to be transferred to No. 1 and 17-2 is performed by semi-automatic operation of the automatic overhead crane 24. As shown in FIG. 2 (A), the recipient of the scrap 11 is
There are three scrap temporary storage yards 17-1 and 17-2 (solid line arrow A), payout hopper 22 (solid line arrow B), and scrap yards 18-1 and 18-2 (broken line arrow D). . Of these, the scrap temporary yard 17
-1, 17-2, acceptance to the hopper 22 is carried out on the operating day of the electric furnace (not shown), and direct delivery to the hopper 22 and delivery from the scrap temporary yard to the hopper 22 are the types of scraps and time series It is performed selectively as appropriate. On the other hand, since only the receiving work is performed on the day when the electric furnace is not in operation, the scrapyards 18-1 and 18-2 are received and stored. On the day when the electric furnace is closed, the scrap yard 18-1, 18- for scrap received in the temporary scrap yard 17-1, 17-2 is also provided.
2 (broken line arrow C) is also accepted as needed.

Of the arrows in FIG. 2 (A), the solid arrow means the moving route of the scrap carried out on the day when the scrap payout work is carried out. On the other hand, the broken arrow means a scrap movement route performed on a day when the scrap payout work is not performed. These scrap receiving (dispensing) operations are shown in steps 36, 37 and 38 of FIG.

Next, the operation of discharging scrap to the hopper 22 by the automatic overhead crane 24 is shown in FIG. 2 (B). This payout work is carried out on the day when the scrap receiving work is carried out. The temporary scrap yard 17-1, 17-
2 to (solid arrow E) and the scrap yard 18- performed on the day when scrap receiving work is not performed
1 and 18-2 (broken line arrow F). In these payout operations, the automatic overhead crane 24 shown in FIG. 1 is automatically operated and two winches 25-
The lifting magnets 26-1 and 26-2, which are driven by the motors 1 and 25-2, move integrally to attract / release scraps, whereby a large amount of scraps can be discharged at one time.

Therefore, when a specified amount of scrap is put into the hopper 22, the bottom of the hopper opens and the basket 2 waiting under the hopper 22 as described above.
1 is transferred (dispensed) to the first unit (step 39 in FIG. 3). Then, when the scrap is transferred to the basket 21, the cart 20 conveys the basket 21 to the position of the steelmaking yard where the electric furnace (not shown) is arranged (step 40 in FIG. 3).

FIG. 4 is an operation flow chart for explaining the operation of the automatic overhead crane 24 during the scrap receiving operation. The process of FIG. 4 is a partial cross-sectional view taken along alternate long and short dash 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 yard 17-1, 17-2 and lifting magnets 26-1, 26-2 are shown. First, the automatic overhead crane 24 has a lifting magnet 26.
-1, 26-2, as shown in the process of FIG. 4, the two tracks 12-1, 12- shown by solid lines from the position shown by broken lines.
Move to a position above 2.

In FIG. 4, the lifting magnet 2 is
6-1 and 26-2 have two trucks 12-1 and 1
The same as the 2-2 interval, but these intervals may be different. In this case, the automatic overhead crane 24 is moved so that the lifting magnet 26-2 is directly above the truck 12-2.

Next, as shown in the process of FIG. 4, the lifting magnets 26-1 and 26-2 are simultaneously wound down to a predetermined position above the two tracks 12-1 and 12-2, and at the same time, one of the tracks is wound. Only the lifting magnet 26-2 on 12-2 is further wound down, and the scrap 11 loaded on one of the trucks 12-2 is attracted. Thereafter, as shown in the process of FIG. 4, the automatic overhead crane 24 replaces the lifting magnet 26-2 sucking the scrap 11 with the other lifting magnet 2-2.
Roll up to the height where 6-1 is waiting.

Next, as shown in the process of FIG. 4, the automatic overhead crane 24 travels toward one of the scrap temporary yard 17-2 and the lifting magnet 26-.
Move 1, 26-2. When the other lifting magnet 26-1 reaches the one truck 12-2, the automatic overhead crane 24 stops traveling and winds up the lifting magnet 26-2 which has sucked the scrap 11. The automatic overhead crane 24 is shown in FIG.
As shown in the process of (1), one lifting magnet 26-2 is rolled up to a position above one scrap temporary yard 17-2 and made to stand by at that height position, and only the other lifting magnet 26-1 is lowered. , Scrap 1 loaded on one truck 12-2
Aspirate 1.

As shown in the process of FIG. 4, the automatic overhead crane 24 winds up the lifting magnet 26-1 which has sucked the scrap 11 to the height position of the waiting lifting magnet 26-2. Further, the automatic overhead crane 24 simultaneously moves the lifting magnets 26-1 and 26-2 to a position above one scrap temporary yard 17-2, as shown in the process of FIG. Then, as shown in the process of FIG. 4, when the lifting magnets 26-1 and 26-2 both reach the upper position of the scrap temporary yard 17-2, the two lifting magnets 26-1 and 26-2 are connected to each other. By releasing at the same time, the scraps 11 that have been sucked into each are stored in the temporary storage yard 17-2. The automatic overhead crane 24 releases the scrap 11 and then simultaneously moves the lifting magnets 26-1 and 26-2,
Return to the position shown in the process of FIG. Then, as shown in FIG.
The steps 1 to 12 are repeated and one track 12
-2, all of the scraps 11 loaded in -2 are stored in the temporary scrap yard 17-2.

After carrying out all the scraps 11 from the one truck 12-2, the overhead crane 24 carries out the scraps 11 loaded on the other truck 12-1 by the same operation flow as the temporary scrap yard 17-1. (Or 17-2). Scrap temporary yard 1
The operation of the automatic overhead crane 24 in the case of receiving in 7-1 is performed in the moving direction of the lifting magnets 26-1 and 26-2 and the order of lowering, hoisting and sucking the scrap 11 of the truck 12-1 at the time of sucking. Except for this, the operation is almost the same as that shown in FIG. 4, and thus detailed description will be omitted.

In the above operation, the automatic overhead crane 2
4 is operated semi-automatically. That is, the process of FIG.
Lifting magnets 26-1, 26-2 in
Winding up, winding down, position change traveling (process in Fig. 4)
And the scrap suction operation is manually operated. For this manual operation, a driver's cab is installed at a position where it is easy to check the scrap state on the building side, and driving operation is performed while visually checking the scrap.

On the other hand, the lifting magnet 26-1,
26-2, traveling to the temporary scrap yard 17-2 in the process of FIG. 4, scrap release operation on the temporary scrap yard 17-2 in the process of FIG. 4, and further scrap temporary yard 17-2 in the process of FIG. Returning from the top to the trucks 12-1 and 12-2 can be automatically driven. Further, the automatic overhead crane 24 is automatically operated for the above-described scrap discharging work to the hopper 22. The automatic operation is performed by the control unit that controls under the control of the scrap yard management computer described above. That is, the control unit previously has a traveling pattern of the automatic overhead crane 24 and lifting magnets 26-1, 26.
The timing of winding-down of -2, the amount of winding, the suction of scraps, and the release are stored. The designation of the automatic operation is performed by pushing the designation button of the traveling pattern or by the instruction from the scrapyard management computer.

The trucks 12-1 and 12-2 from which all the scraps 11 have been carried out exit from the truck loading lane 16, and two new trucks waiting at the truck waiting area 13 enter the truck loading lane 16. The same scrap receiving work is repeated. Although the above description has been made on the case where the scrap 11 of the trucks 12-1 and 12-2 is received in the scrap temporary storage yards 17-1 and 17-2, the scrap yard 18 as shown in FIG. -1, 18-2 and the operation when directly receiving the hopper 22 are completely 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.
These scrap temporary storage yards 17-1 and 1
An example is shown in which 7-2 is operated by one receiving / delivering automatic overhead crane, but the number of temporary scrap yard may be two or more. For example, in the case of two pairs, one automatic overhead crane is provided for each pair of scrap yards, one is semi-automatic operation on the receiving side and the other is automatic operation on the payout side. In any case, in the present invention, the number of automatic overhead cranes may be one in a pair of scrap yards, so that the number of operators is smaller than that in the case of two automatic cranes in one yard as shown in FIG.

The automatic overhead crane is equipped with two lifting magnets, and a truck loading lane 16, scrap temporary storage yards 17-1, 17-2, scrap yards 18-1, 18-2, and a hopper 22 are gathered and arranged. Therefore, it is possible to reduce the cycle time by increasing the amount of scrap adsorbed per time and reducing the transport distance.

[0035]

According to the present invention described above, since the truck loading lane, the scrap temporary storage yard, the basket and its moving mechanism, and the payout hopper are centrally arranged, one scrap transportation is performed for one yard. The automatic ceiling crane for receiving and discharging scraps can reduce the number of workers, and all the received scraps can be directly or temporarily stored without being temporarily stored. The efficiency and equipment capacity can be greatly improved.

Further, in the scrap-carrying automatic overhead crane used in the present invention, two lifting magnets are provided so that the two lifting magnets can be independently operated when the scrap is suction-loaded from the truck. Therefore, a single crane can receive a large amount of scrap at the same time, the number of cranes can be reduced, the problem of crane interference is reduced, and work efficiency is significantly improved.

[Brief description of drawings]

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

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

FIG. 3 is a work flow diagram showing a flow of a scrap receiving work and a paying-out work by the scrap transport system of the present invention.

FIG. 4 is an operation flow diagram for explaining the operation of the scrap-carrying automatic overhead crane during a scrap receiving operation by the scrap-carrying system of the present invention.

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

[Explanation of Codes] 12 trucks 13 truck waiting areas 14 weighing stations 15 truck scales 16 truck loading lanes 17-1, 17-2 temporary scrap yard 18-1, 18-2 scrapyards 19 rails 20 trucks 21 for scrap transportation Basket 22 Dispensing hopper

Claims (3)

[Claims] 1. A truck loading yard into which a truck loaded with scrap is loaded, temporary scrap yard disposed on both sides of the truck loading yard, and a scrap loading yard provided on the opposite side of the truck loading yard. At least one scrap yard, a basket movably provided on a track laid between the truck loading yard and an electric furnace, and the track adjacent to the truck loading yard for supplying scrap to the basket. A scrap hopper disposed above, a scrap transport crane movably disposed above a range including the truck loading yard, the dispense hopper, and the scrap yard, and the scrap transport crane. Features a lifting magnet that can be rolled up and down The scrap transport system is characterized by 2. The scrap transport system according to claim 1, wherein the scrap transport crane has two lifting magnets that can be independently hoisted and unwound. 3. The scrap transport system according to claim 1, wherein in the scrap transport crane, hoisting, lowering and scrap suction operations of the lifting magnet on the track are performed by manual operation. Scrap characterized by the fact that the traveling of the lifting magnet to the scrap temporary yard, the scrap releasing operation on the scrap temporary yard, and the return traveling from the scrap temporary yard to the truck are performed by automatic operation. Transport system.