JPH0347718Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an additive charging device for charging additives into a ladle (distributing ladle) that receives molten metal from a melting furnace or a holding furnace, for example. It is.

(Prior art) Generally, when adding multiple types of additives, such as inoculants, to molten metal received in a ladle from a melting furnace, these additives are deposited in advance in a predetermined order in the ladle. After that, the molten metal is poured into the ladle.

By the way, as a conventional technique, there is a structure shown in FIG. 3.

That is, the melting furnace 1 and the additive conveying device 2 are spaced apart from each other laterally (in the left-right direction in FIG. 3), and the melting furnace 1 is rotatably supported around an axis in the left-right direction. A tap hole 1a is formed on the front surface thereof.

The additive conveying device 2 also includes a plurality of storage hoppers 3, each containing a single type of additive.
4 and 5 are arranged in parallel in the left and right direction, and a shutter 3 for opening and closing is provided on the bottom of each storage hopper 3, 4, 5.
a, 4a, 5a are provided, and each of these shutters 3a,
A first belt conveyor 6 extending from left to right and a second belt conveyor 7 extending toward the front from the first belt conveyor 6 are arranged directly below 4a and 5a.

Further, a large number of casting devices 9 are arranged in front of the melting furnace 1 and the additive conveying device 2, and a ladle 8 that moves between the melting furnace 1, the additive conveying device 2, and the casting devices 9 is provided.

Then, the ladle 8 is first transferred to the additive conveying device 2.
to the lower front of the second belt conveyor 7,
In this section, each shutter 3a, 4a, 5a is opened for a predetermined time to drop a predetermined amount of additive from the storage hoppers 3, 4, 5 onto the first belt conveyor 6 and second belt conveyor 7, and then the conveyor 6 , 7 to the right and forward as shown by arrows A and B, and the above additives are sequentially dropped and deposited in the ladle 8.

Next, the ladle 8 is moved below the tap port 1a of the melting furnace 1, the melting furnace 1 is tilted at this point, and the molten metal is poured into the ladle 8 from the tap port 1a.
There was a structure in which the molten metal in the ladle 8 was poured into each casting device 9 by moving the molten metal forward.

(Problems to be solved by the invention) In the conventional method, after moving the ladle 8 to the side of the additive conveying device 2 which is spaced from the melting furnace 1, the additive conveying device 2 is started and the second Since the additives were directly introduced into the ladle 8 from the belt conveyor, the time required to introduce the additives into the ladle 8 became longer, and it became difficult for the additives to be deposited in an orderly layer in the ladle 8. There was a drawback.

The object of the present invention is to obtain a device for introducing additives into a ladle that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is constructed as follows.

That is, a plurality of storage hoppers with shutters each containing a single type of additive are arranged horizontally in parallel, and a belt conveyor is arranged to extend horizontally directly below each storage hopper. A tapping spout is placed horizontally apart from the conveying end of the belt conveyor, a ladle is placed below the tap, and the rotating end of the arm rotates horizontally about a vertical axis. A charging hopper is provided with an open upper surface and an opening/closing shutter on the lower surface, and one end and the other end of the rotation locus of the charging hopper are directly below the conveyance end of the belt conveyor and the ladle. The configuration is such that it is placed at the top.

(Function) Since the present invention has the above-mentioned configuration, the input hopper is moved to a position below the conveyance end of the belt conveyor via the arm, and the shutters of each receiving hopper are opened to pour a predetermined amount of each additive onto the belt conveyor. After being deposited on the conveyor, when the belt conveyor is started, each of the deposited additives falls one after another from the conveyance end of the belt conveyor and is deposited in a layer in the input hopper.

Next, when the charging hopper is moved to a position above the ladle and the opening/closing shutter is opened, the additives deposited in the charging hopper fall by their own weight toward the ladle, starting from the bottom of the loading hopper. They will be deposited on the bottom of the ladle in the same order as in the input hopper.

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

FIG. 1 is a schematic plan view showing an embodiment of the present invention, and FIG. 2 is a sectional front view of the main part thereof.

In FIGS. 1 and 2, the melting furnace 1, additive conveying device 2, ladle 8, and casting device 9 are
The structure is substantially the same as that shown in the figure, and similar parts are given the same reference numerals in FIGS. 1 and 2 as those in FIG. 3, and the outline thereof will be explained.

That is, the melting furnace 1 is a melting furnace for melting ingots for cast iron, for example, and is rotatably supported via support pins 1b extending in the left-right direction, and has a tap hole 1a on the front side thereof. .

The additive conveying device 2 is arranged on the left side of the melting furnace 1, and has three storage hoppers 3, 4, and 5 arranged in parallel in the left-right direction, and has an opening/closing device on the bottom of each storage hopper 3, 4, and 5. Shutters 3a, 4a, and 5a are provided to allow single types of additives A, B, and C contained therein to flow down individually.

Further, a first belt conveyor 6 extends in the left-right direction directly below each shutter 3a, 4a, 5a, and a second belt conveyor 7 extends toward the front directly below the right end of the first belt conveyor 6. It becomes by arranging.

Note that the additives A, B, and C are made of, for example, silicon, magnesium, iron, etc. for obtaining spheroidal graphite cast iron.

A large number of casting devices 9 are arranged in parallel on the left and right in front of the melting furnace 1 and the additive conveying device 2, and have a receiving port 9a on each opposing side.

The ladle 8 is installed so as to be able to reciprocate between the bottom of the tap opening 1a of the melting furnace 1 and the receiving opening 9a of each casting device 9.

Reference numeral 10 denotes an additive charging device which is a feature of the present invention, in which a support pin 11 is arranged vertically in the middle between the melting furnace 1 and the additive conveying device 2, and one end of the arm 12 is attached to the support pin 11. Rotatably supported.

A charging hopper 13 having an open upper surface and an opening/closing shutter 13a on the lower surface is connected to the rotating end of the arm 12.

The length of the arm 12 and its vertical position are as follows:
When the arm 12 rotates to the left in the figure,
The input hopper 13 is connected to the second belt conveyor 7 mentioned above.
When the arm 12 rotates to the right in the figure, the charging hopper 13 is located at the lower left of the outlet 1a of the melting furnace 1. Set as follows.

In addition, the ladle 8 has a partition wall 8b at the center of its bottom wall.
Additive deposition chamber 8 with an upright structure and an open top on the left side.
a, and when the ladle 8 moves below the outlet 1a of the melting furnace 1, the additive deposition chamber 8
A is set so that it is biased to the left of the tap 1a and positioned below the charging hopper 13 which has been rotated to the right.

Next, the operation mode of the above embodiment will be explained.

First, with the first and second belt conveyors 6, 7 stopped, the shutters 3a, 4a, 5a of each storage hopper 3, 4, 5 are operated for a predetermined period of time, and a predetermined amount of each additive A, B, c) is deposited on the first belt conveyor 6.

Next, the arm 12 is rotated to the left in the figure to move the input hopper 13 below the conveyance end 7a of the second belt conveyor 7, and then the belt conveyors 6 and 7 are operated to release each additive A and I. , c are sequentially dropped into the input hopper 13.

Then, each additive a,
A and C are sequentially deposited in layers from the bottom upwards.

Next, the arm 12 is rotated to the right in the figure to move the charging hopper 13 above the additive storage chamber 8a of the ladle 8 that has arrived at the outlet 1a, and the opening/closing shutter 13a is operated to open the charging hopper. 13
Additives A, B, and C are placed in the additive deposition chamber 8 in the order of deposition.
Let it fall under its own weight toward a.

As a result, the additives in the input hopper flow down one after another, and additives A, B, and C are sequentially deposited in layers from the bottom upwards in the additive deposition chamber 8a. .

Next, the melting furnace 1 is operated in a tilted manner to open the tap outlet 1.
Molten metal is poured into the right side of the ladle 8 from a.

In this case, the charging hopper 13 dropped and supplied toward the additive deposition chamber 8a is transferred from the melting furnace 1 to the ladle 8.
During the step of tapping the molten metal into the molten metal, or during the step of moving the received ladle 8 toward the casting device 9 and pouring it into the casting device 9, in parallel, the additive conveying device 2 moves again. The additives A, B, and C for the next step are deposited in the same manner as described above via the storage hoppers 3, 4, and 5 and the belt conveyors 6 and 7.

(Effects of the invention) As is clear from the above explanation, the present invention accumulates and accommodates the additives conveyed from the belt conveyor in a small input hopper, and moves the input hopper horizontally around the vertical axis. For example, the ladle is dropped into the ladle that has arrived at the outlet of the melting furnace. The additive conveying device and the charging hopper can be operated in advance regardless of the moving position, and the additive can be quickly charged into the ladle.

Furthermore, each additive is deposited in a layer in a predetermined order in the input hopper, and the deposited additives are dropped into the ladle by opening the bottom of the input hopper, so that each additive is concentrated. This results in the additives falling into the ladle, resulting in the effect that each additive can be deposited in a regular layer in the ladle.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention, FIG. 2 is a sectional front view of the main part thereof, and FIG. 3 is a schematic plan view showing a conventional example. 1: Furnace (melting furnace), 1a: Tap tap, 2: Additive conveyance device, 3, 4, 5: Accommodation hopper, 3a, 4
a, 5a: shutter, 6, 7: first and second belt conveyors, 7a: conveyance end, 8: ladle, 8a: additive deposition chamber, 9: casting device, 10: additive charging device, 11: support Pin, 12: Arm, 13: Input hopper, 13a: Opening/closing shutter, A, I, C: Additive.

Claims (1)

[Scope of utility model registration request] A plurality of storage hoppers with shutters each containing a single type of additive are arranged horizontally in parallel, and a belt conveyor is arranged to extend horizontally directly below each storage hopper. is placed horizontally apart from the conveying end of the belt conveyor, a ladle is placed below the tap, and the upper surface is attached to the rotating end of the arm that rotates horizontally about the vertical axis. A charging hopper is provided which is open and has an opening/closing shutter on the lower surface, and one end and the other end of the rotation locus of the charging hopper are arranged directly below the conveyance end of the belt conveyor and above the ladle. A device for introducing additives into a ladle, characterized in that the device is arranged in a ladle.