JPH09240983A - Scrap charging bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform main winding and sub-winding of a scrap charging bucket by one hook. SOLUTION: A two-piece bottom cover 3 is fitted to the lower end part of a bucket main body 2 capably of being opened/closed. Into guide metallic materials 7 respectively fitted to the front face part and the rear face part of the bucket main body 2, the vertical parts 8a of equalizer plates 8 of inverted T-shape are inserted slidably in the vertical direction. The lower end part of a gate type hanger beam 10 provided with a trunnion on the upper face is connected with the upper end part of the each equalizer plate 8. Both end parts of the horizontal part 8b of the equalizer plate 8 and the brackets 13 for supporting links fitted to the two-piece bottom cover 3 are connected together through link plates 14 so as to form a link mechanism 12, and as the equalizer plates 8 are slidingly moved in the vertical direction, the bottom cover 3 is opened or closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scrap charging bucket used for transporting scrap as a raw material into a steelmaking yard and charging it into an electric furnace.

[0002]

2. Description of the Related Art An electric furnace is designed to generate an arc between a scrap charged in the furnace and an electrode, and utilize the high heat of the arc to melt the scrap to make steel. Scrap charging buckets that have been conventionally used for transporting and charging the steel include a clamshell type, an armor type, an orange peel type, and the like.

FIG. 5 is a schematic view of the clamshell type charging bucket described above.
Left and right (or front and rear) divided into two parts and scrap b
A dish-shaped (bottomed hopper-shaped) bottom lid c having a sufficient depth for accommodating the bucket body a so that the upper end of the bottom lid c surrounds the lower end of the bucket body a. Further, the lower ends of a gate-shaped hanger beam f having a trunnion e for hooking a main winding hook d on the upper surface are rotatably attached to the front and rear upper portions of the bucket body a by horizontal pins g. Further, two support pins h are symmetrically projecting forward and backward on the front surface and the rear surface of the bucket body a, and the front and rear of each upper surface of the bottom cover c divided into two are provided on the respective support pins h. L-shaped suspension links that are fixed in total at four positions i
The intermediate portions of the above are rotatably attached, and the upper ends of the front and rear suspension links i are connected by pins via the link plates j. The divided surfaces of the bottom lid c are brought into close contact with each other by their own weight. By doing so, the scrap b accommodated inside is retained, and
The auxiliary cover wire rope m bound to the hanging piece k fixed to each outside of the bottom cover c divided into two parts is hooked with the auxiliary winding hook n and wound up by the crane, whereby the divided bottom cover c is formed. With the support pin h as a fulcrum, it is opened by rotating in the left-right direction with the dividing surface as a boundary.

In the armor type scrap charging bucket, as shown in FIG. 6, the bottom end of the bucket main body o having a rounded bottom has a roundness corresponding to the bucket main body o. The lower end of a gate-shaped hanger beam f having a two-stage multi-stage bottom lid p rotatably mounted in the left-right direction with support pins h and having a trunnion e for hooking a main winding hook f on the upper surface. Are rotatably attached to the front and rear surfaces of the bucket body o by pins g, and further, the auxiliary winding wire rope m bound to each divided portion of the bottom lid p is wound up through the auxiliary winding hook n. The bottom lid p of the divided structure is opened by rotating in the left-right direction with the support pin h as a fulcrum and dividing the divided surface.

[0005]

However, in the case of the above-mentioned conventional scrap charging bucket, whether it is a clamshell type, armor type, orange peel type or the like, the main purpose is to lift the entire weight of the scrap charging bucket. Winding hook d and auxiliary winding hook n for opening bottom lids c and p
Since they are hooked separately, the strokes of the main winding and the auxiliary winding can be reduced in the case of automating the transportation and charging of scrap into the electric furnace during the steelmaking process, labor saving and wireless communication. Since they are different from each other, a high-level control is required in which the main winding and the auxiliary winding are separately speed-controlled to synchronize them, and moreover, the auxiliary-winding wire rope m has to be appropriately replaced, and for that purpose, The maintenance time and the replacement cost are required, and when the scrap b charged into the electric furnace is pushed further, the main winding hook d is lowered too much, so that the main winding hook d comes off from the trunnion e. Further, the scrap charging bucket is suspended in the air and the scrap b is charged into the electric furnace in an unstable state not necessarily located on the center of the electric furnace. Since had Unishi scrap b had sometimes would spend wasteful time and power for the melt gone biased in an electric furnace, a problem that is.

In view of the above, the present invention facilitates automation of scrap transportation and loading operations, labor saving, and wireless communication by making it possible to perform main winding and auxiliary winding with one hook. Furthermore, the present invention is intended to provide a scrap charging bucket that can charge scrap into an electric furnace in a stable state.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a bottom lid having a two-part structure capable of closing the bottom of the bucket body can be opened and closed vertically at the lower end of the bucket body. The lower end of the hanger beam is connected to the upper end of the equalizer plate which is attached to the bucket main body and is slidably supported in the vertical direction, and the lower end both sides of the equalizer plate and the bottom of the two-divided structure The lid and the lid are connected to each other through a link mechanism so that the bottom lid is opened and closed as the equalizer plate is slid in the vertical direction, and further placed on the upper surface of the electric furnace during scrap loading. It is configured to be provided with a leg portion fixed to the bucket body.

When the hook of the crane is hooked on the trunnion to wind up the crane, the total weight of the scrap charging bucket itself and the scrap stored in the inside of the scrap loading bucket itself, the bottom cover, the link mechanism, the equalizer plate,
It will be supported by the crane via the hanger beam and the bottom lid can be kept closed as long as the equalizer plate is kept raised. Further, when the scrap charging bucket suspended by the crane is placed on the upper part of the electric furnace and the hook is gradually lowered, the equalizer plate and the link mechanism are connected to each other as the equalizer plate is lowered together with the hanger beam. The bottom lid of the two-part structure connected via the above is opened by its own weight and the weight of scrap.

If a lubricative metal bush is attached to the inside of the guide metal article and the equalizer plate is brought into contact with the metal bush, the equalizer plate can be slid vertically along the guide metal article. If each leg is equipped with a shock absorber, it is possible to suppress the shock that occurs when the scrap charging bucket is placed on the upper part of the electric furnace, and further, to prevent the bucket body from being opened and closed at right angles to the opening and closing direction of the bottom lid. If the scrap scattering prevention plate is fixed to the lower end position, the upper side of the electric furnace is surrounded from four sides by the bottom lid and the scattering prevention plate that are opened while the scrap is being loaded into the electric furnace. be able to.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of a scrap charging bucket according to the present invention, in which a cone which is squeezed downward to prevent the scrap 1 contained therein from dropping at a stretch. At the lower end of the bucket body 2 having the portion 2a at the bottom, a flat bottom 3 having a two-part structure and having a size that covers the bottom of the bucket body 2
Are attached so that they can be opened and closed. That is, the bracket 4 is attached to each of the lower end portions on the left and right sides of the bucket body 2.
Are fixed so as to project outward, and brackets 5 are provided on the upper surface of each of the two bottom lids 3 corresponding to the brackets 4 so as to correspond to the brackets 4. The bracket 5 on the third side is rotatably connected and supported by a supporting pin 6 so that the left and right bottom lids 3 can be opened and closed centering on the supporting pin 6. Further, hollow guide metal pieces 7 are vertically fixed to the front surface portion and the rear surface portion of the bucket body 2, and a vertical portion 8a of an inverted T-shaped equalizer plate 8 is vertically arranged inside each of the guide metal pieces 7. It is slidably inserted, the lower end of a gate-shaped hanger beam 10 having a trunnion 9 on the upper surface is rotatably connected to the upper end of the vertical portion 8a of each equalizer plate 8 by a horizontal pin 11, Each equalizer plate 8 located is allowed to move up and down together with the hanger beam 10, and both end portions of the horizontal portion 8b of each equalizer plate 8 and the left and right divided bottom lids 3 are linked.
Connect via 2. That is, the equalizer plate 8
And a link support bracket 13 projecting from the upper surface of the bottom cover 3 corresponding to the positions of both ends of the horizontal portion 8b.
When the equalizer plate 8 slides in the guide metal piece 7 and moves upward, the link mechanism 1 is connected.
The bottom lid 3 is closed via the support pin 6 as a fulcrum via the reference numeral 2, and the bottom lid 3 is opened with the support pin 6 as a fulcrum when the equalizer plate 8 descends in the guide hardware 7.

Further, a lubricative metal bush 16 is lined in the guide metal 7, and the equalizer plate 8 is provided.
Make the movement of the ascending and descending smooth.

Further, at four circumferential positions of the bucket body 2, leg portions 19 each having a shock absorber 18 utilizing the elastic force of the spring 17 built in at the lower end thereof are provided, and each lower end projects downward from the bottom cover 3. Each of the buckets 2 has a fixed length, and the scatter prevention plates 20 for the scrap 1 are attached to both front and rear surfaces of the lower conical portion 2a of the bucket body 2. Reference numeral 21 is a receiver when the hanger beam 10 is tilted in the left-right direction, 22 is a carriage, 23 is a hook, and 24 is an electric furnace.

When the scrap 1 is to be stored in the scrap charging bucket according to the present invention, the scrap charging bucket is mounted on the carrier 22 by placing the bottom lid 3 directly on the top plate of the carrier 22. To put it. As a result, the bottom cover 3 is sandwiched between the bucket body 2 and the top plate of the carriage 22 to be in a closed state, and the equalizer plate 8 is kept in a raised state. Since the hanger beam 10 connected to the upper end of the hanger beam 10 is also raised, the hanger beam 10 is received toward the receiving side 21 as shown by the chain double-dashed line in FIG.

Next, when the scrap 1 stored in the scrap charging bucket of the present invention is charged into the electric furnace, the carrier truck 22 is moved to convey the scrap charging bucket to the vicinity of the electric furnace 24. Then, after the hanger beam 10 is erected upright, a hook 23 (not shown) of the crane is hooked on the trunnion 9 to wind up the crane and suspend the scrap charging bucket of the present invention. As a result, the total weight of the scrap charging bucket itself and the scrap 1 contained therein is supported by the crane via the bottom cover 3, the link mechanism 12, the equalizer plate 8, the hanger beam 10 and the trunnion 9, The equalizer plate 8 is kept in the pulled-up state, and the link plate 1 constituting the link mechanism 12 is held.
4. The bottom cover 3 can be pulled up through the link supporting bracket 13 and maintained in the closed state. In this state, the scrap charging bucket is conveyed to the central portion of the electric furnace 24, and then lowered to the upper portion of the side wall of the electric furnace 24.
Try to put the legs 19 of the book. Thereafter, the hook 23 of the crane is gradually lowered so that the equalizer plate 8 is lowered together with the hanger beam 10. When the equalizer plate 8 descends, the link plate 14 between the equalizer plate 8 and the link supporting bracket 13 rotates, so that the bottom cover 3 having a two-part structure is attached to the bucket body 2 side by its own weight and the weight of the scrap 1. With the support pin 6 inserted in the bracket 4 and the bottom cover side bracket 5 as a fulcrum, the support pin 6 is rotated to the left and right to be opened, and the scrap 1 can be loaded into the electric furnace 24.

When the loading of the scrap 1 is completed and the hook 23 is lifted by the crane, the equalizer plate 8 is lifted together with the hanger beam 10, so that the link plate 14 is attached to the equalizer plate 8.
The bottom cover 3 connected to the link support bracket 13 via the link support bracket 13 is pulled up and closed.

In the above description, since the lubricative metal bush 16 is lined inside the guide metal 7, the equalizer plate 8 can be slid vertically in the guide metal 7 and can be slid vertically. Each leg 19
Since the shock absorber 18 utilizing the elastic force of the spring 17 is built in at the lower end of the electric shock absorber, it is possible to suppress the shock generated when the scrap charging bucket is placed on the side wall of the electric furnace 24. Furthermore, the bucket body 2
Since the anti-scattering plates 20 are attached to both the front and rear side surfaces of the conical portion 2a, while the scrap 1 is being loaded into the electric furnace 24, the bottom lid 3 opened to the left and right and the front and rear scatterings are scattered. Since the upper side of the electric furnace 24 can be surrounded from four sides by the prevention plate 20, the bottom cover 3 can also serve as the scattering prevention plate 20, and the scattering of the scrap 1 can be effectively prevented.

Therefore, according to the present invention, the main winding and the auxiliary winding can be performed by only one hook 23, and it is easy to automate the carrying and loading operations of the scrap 1, labor saving and wireless communication. Further, the scrap 1 is charged in a stable state by charging the scrap 1 into the electric furnace 24 with the scrap charging bucket placed on the side wall of the electric furnace 24. be able to.

The present invention is not limited to the above-mentioned embodiment, and for example, the above-mentioned embodiment shows the case where the flat plate-shaped bottom cover 3 is used.
A conical bottom lid 3 may be used, or
Link plate 14 length and link support bracket 1
Depending on the mounting position of 3, the equalizer plate 8 having a linear shape or an inverted Y shape may be used, and as the shock absorber 18, an elastic body other than the spring 17 such as heat resistant rubber may be used. Needless to say, various changes can be made without departing from the scope of the present invention.

[0020]

As described above, according to the scrap charging bucket of the present invention, the bottom lid of the bucket main body, which has a two-part structure and can close the bottom of the bucket main body, can be opened and closed in the vertical direction. The lower end of the hanger beam is connected to the upper end of the equalizer plate which is attached to the bucket main body and is slidably supported in the vertical direction, and the lower end both sides of the equalizer plate and the bottom of the two-divided structure The lid and the lid are connected to each other through a link mechanism so that the bottom lid is opened and closed as the equalizer plate is slid in the vertical direction, and further placed on the upper surface of the electric furnace during scrap loading. Since it is equipped with legs for fixing to the bucket body, the hanger beam connected to the upper end of the equalizer plate is clamped. If you like pulled up by the emissions,
The equalizer plate can be kept in a raised state and the bottom lid can be kept in a closed state to suspend the entire bucket, and a scrap charging bucket suspended by a crane via a hanger beam can be used in an electric furnace. If you place it on top of the hanger beam and gradually lower the hanger beam, the equalizer plate will be lowered along with the hanger beam and the bottom lid can be opened, so you can perform the main winding and auxiliary winding with only one hook. It is possible to automate scrap transportation and charging, labor saving and wireless communication. Compared with the conventional case where the main winding hook and auxiliary winding hook are used separately. As a result, the time for charging scrap into the charging bucket and charging time into the electric furnace can be shortened by eliminating the need for supplementary winding. Since the winding wire rope is unnecessary, maintenance and replacement work relating to the auxiliary winding wire rope can be eliminated, the slinging work can be simplified, and the working conditions of the crane operator can be improved. Since the scrap charging bucket is placed on the center line of the upper surface of the electric furnace, the scrap can be charged in a stable state and the scrap can be charged into the electric furnace. It can be loaded evenly, and by attaching a lubricative metal bush to the contact surface between the guide hardware and the equalizer plate,
The equalizer plate can be slid vertically up and down along the guide hardware, and by equipping the lower end of each leg with a shock absorber, when the scrap charging bucket is placed on top of the electric furnace, The generated shock can be suppressed. Furthermore, by installing a scrap scattering prevention plate, the bottom lid and the scattering prevention plate that are opened during the loading of scrap into the electric furnace can make the upper side of the electric furnace four sides. It has an excellent effect that it can be surrounded by.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of a scrap charging bucket of the present invention.

FIG. 2 is a partially cutaway side view of the scrap charging bucket of the present invention shown in FIG.

FIG. 3 is a plan view of the scrap charging bucket of the present invention shown in FIG.

FIG. 4 is a schematic front view showing a state where the bottom cover shown in FIG. 1 is closed and the bottom cover is opened for scrap charging.

FIG. 5 is a schematic view showing a clamshell type scrap charging bucket which has been conventionally used.

FIG. 6 is a schematic view showing an armor type scrap charging bucket which has been conventionally used.

[Explanation of symbols]

 1 Scrap 2 Bucket Body 3 Bottom Lid 4 Bracket 5 Bracket 6 Support Pin 7 Guide Hardware 8 Equalizer Plate 10 Hanger Beam 12 Link Mechanism 13 Link Support Bracket 14 Link Plate 15 Connecting Pin 16 Lubricating Metal Bushing 18 Shock Absorber 19 Leg Part 20 Scatter prevention plate 24 Electric furnace

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Junichi Kawabata 2-1 Hinodemachi, Iwakuni City, Yamaguchi Prefecture Iwakuni Manufacturing Co., Ltd.

Claims (4)

[Claims] 1. A bottom cover, which has a two-part structure and can close the bottom of the bucket body, is attached to the lower end of the bucket body so as to be openable and closable in the vertical direction, and slides vertically on a guide metal member fixed to the bucket body. The lower end of the hanger beam is connected to the upper end of the freely supported equalizer plate, and both end parts of the lower end of the equalizer plate and the bottom lid having the two-divided structure are connected to each other through a link mechanism, and the equalizer plate is The bottom lid is opened and closed as it is slid in the vertical direction.Furthermore, the bottom portion is fixed to the bucket body to be placed on the upper surface of the electric furnace during scrap loading. Characteristic scrap charging bucket. 2. The scrap charging bucket according to claim 1, wherein a lubricative metal bush is attached to the inside of the guide metal piece, and the equalizer plate is brought into contact with the metal bush. 3. The scrap charging bucket according to claim 1, wherein each leg is provided with a shock absorber. 4. The scrap charging bucket according to claim 1, wherein a scrap scattering prevention plate is fixed at a lower end position of the bucket body perpendicular to the direction in which the bottom lid is opened and closed.