JP3086395B2 - Cleaning device and cleaning method for flow control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device and a cleaning method for automatically cleaning a flow control device for controlling a flow rate of molten steel in a ladle or a tundish of a molten steel casting system for steelmaking.

[0002]

2. Description of the Related Art As a conventional molten steel casting system in iron making, there is a system configured as shown in FIG. 8, for example. FIG. 9 is an enlarged detailed view around the flow control device. In FIG. 8, below the ladle 1 into which molten steel has been poured, FIG.
The tundish 2 is connected via a flow control device 3, which will be described in detail later, and a plurality of flow control devices 3 similar to the above are attached to the bottom of the tundish 2 as shown in FIG. . In FIG. 9, a through-hole having a circular cross section is formed at the bottom of the tundish 2 having the refractory brick 5 adhered to the inner surface, and a tuyere block 4 made of a refractory material is inserted into the through-hole in advance. . Mortar 6 is applied to the outer periphery of the truncated conical through hole formed at the center of the tuyere block 4, and the upper nozzle 7 is inserted. The flow control device 3 is attached outside the upper nozzle 7. The flow control device 3 includes an outer frame 13 shown in FIG. 10 to be described later, a refractory plate 8A having a convex cross section inserted into a recess at the center of the outer frame 13, and an outer frame 1.
A cover 11 slidably attached to the side surface of the outer frame 3 via a hinge, a slider 9 slidably housed outside the outer frame 13, and a slider 9 inserted into a concave portion formed on the inner surface side of the slider 9. Refractory plate 8B and cover 11
The rod 10a penetrates the holder 14 and the lower nozzle 15 inserted from the inside into the through-hole formed in the inverted convex cross section formed at the center of the rod and the bush 13a mounted on the right end of the outer frame 13, and the tip of the rod 10a And a hydraulic cylinder 10 connected to the right end. Of these, plates 8A and 8
In B, the contact surfaces are pressed against each other by a plurality of springs (not shown). In the molten steel casting system in which the flow control device 3 configured as described above is provided at the bottom of the ladle 1 and the bottom of the tundish 2, the molten steel inside the ladle 1 passes through the flow control device 3 at the bottom and the tundish 2.
The molten steel supplied is supplied to the tundish 2
Is injected into a mold (not shown) by a plurality of flow control devices 3 provided at the bottom of the mold. In the supply process of the molten steel, the plate 8B is driven to the left in FIG. 9 together with the slider 9 by the operation of the hydraulic cylinder 10, and the flow rate of the molten steel supplied from the nozzle 7 through the hot hole formed in the plate 8A is equal to the plate 8B. Is controlled by

Incidentally, the nozzle 7 and the plates 8A, 8B incorporated in the flow control device 3 constructed as described above are used.
Has a short life due to severe erosion due to high temperature molten steel.
Some must be replaced about six times a day. FIG. 10 shows a conventional cleaning method when replacing the nozzle 7 and plates 8A and 8B. The replacement of the upper nozzle 7 and the plates 8A, 8B, etc. is different in replacement time, and there are a case where only the plates 8A, 8B are replaced and a case where the plates 8A, 8B and the upper nozzle 7 are replaced. After pouring all molten steel inside the mold 1 or the tundish 2 into the mold, the ladle 1 is lifted with a rope on the hook 1a shown in FIG. 8, and the tundish 2 is transported to a predetermined exchange place. As shown in FIG. 10, the flow control device 3 is turned 90 degrees by a turning device (not shown), and the flow control device 3 is set in a vertical state. In this state, the cover 11 is opened, the plates 8A and 8B are removed, and the mortar 6 adhering to the end face of the nozzle 7 of the flow control device 3 is removed using the rotary brush tool 12 before the new plate is mounted. A deposit such as tar adhering to the plate 8 mounting surface of the control device 3 is removed. Also,
When replacing the plates 8A and 8B and the upper nozzle 7,
Open the cover 11 on the front of the flow control device 3, and
A and 8B are removed, the upper nozzle 7 is removed, and the nozzle mounting portion of the tuyere block 4 is cleaned. Then, mortar 6 is applied to a new upper nozzle 7 and the upper nozzle is mounted on the nozzle mounting portion of the tuyere block 4. 7 is attached. At this time, the mortar 6 applied to the upper nozzle 7 slightly protrudes from between the tuyere block 4 and the upper nozzle 7. Therefore, after removing the extruded mortar 6 using a spatula or the like, the rotary brush tool 12 is used to remove deposits such as tar adhering to the plate mounting surface of the flow control device 3. After removing the deposits such as tar, air is blown to the entire flow control device 3 with an air gun (not shown), and the spills spilled into the flow control device 3 are blown off.

[0004]

A series of cleaning operations described above are performed manually by several people in a high-heat working environment. However, when the ladle or tundish is cooled, the work is performed. Once the ladle or tundish has cooled, it has to be preheated again, so that it takes a long time and the workability is lowered, and there is a problem that a large amount of energy is consumed. Therefore, since the flow control device was cleaned in the hot state immediately after the molten steel flowed out, the flow control device was approached as well as the ladle or tundish.When the cover was opened, radiant heat was intense and danger was involved. And tar becomes a powder state, so it also becomes dust work. Since this work is performed several times a day, a great deal of labor is spent, it is difficult to maintain the safety of the worker, and problems such as a high degree of fatigue of the worker have occurred.

The present invention has been made in view of such a conventional problem. The present invention aims to reduce a large amount of labor by a mechanical operation, improve safety in a high-temperature operation, and consume a large amount of energy. It is an object of the present invention to provide a cleaning device and a cleaning method for a flow control device, which can reduce the amount of work and improve the efficiency of workability.

[0006]

According to a first aspect of the present invention, there is provided a cleaning device for a flow control device for cleaning a ladle or a tundish of a molten steel casting system. A rotating brush for brushing the residue adhering to the flow control device, a motor for rotating and driving the rotating brush, a rotating brush cover provided to cover the rotating brush, and a rear of the rotating brush cover. The gist is to have a vacuum mechanism that collects the slag that is connected and removed by brushing, and a pressing mechanism that integrally presses the rotary brush, the motor, the rotary brush cover, and the vacuum mechanism against the flow control device with a constant force. I do.

A cleaning device for a flow control device according to a second aspect of the present invention is the cleaning device for a flow control device according to the first aspect, wherein the rotary brush cover has a scraper for scraping off the slag such as mortar; The gist is to provide an air blow nozzle for blowing air to the rotating brush.

According to a third aspect of the present invention, there is provided a method of cleaning a flow control device for replacing a ladle or a tundish plate of a molten steel casting system using the cleaning device of the second aspect. The lower nozzle and the plate are removed while the flow control device is tilted by rotating the ladle or the tundish 90 degrees sideways, and the cleaning device is mounted on a robot and the predetermined position of the flow control device is determined. , The air is blown to the rotating brush by the air blow nozzle, the rotating brush is rotated by the motor, the cleaning device is brought closer to the flow control device by the robot operation, and the rotating brush is brought into contact with the flow control device by the pressing mechanism. The brush is brushed according to the shape of the cleaning part of the flow control device by the robot operation, and the brushed scum is suctioned and removed by the vacuum mechanism. It is the gist of.

According to a fourth aspect of the present invention, there is provided a method of cleaning a flow rate control device for replacing a ladle or a tundish plate and an upper nozzle of a molten steel casting system using the cleaning device according to the second aspect. In this cleaning method, the plate and the upper nozzle are removed while the flow control device is tilted by rotating the ladle or tundish 90 degrees sideways, and mortar is newly applied to the upper nozzle to control the flow rate. Attached to the device, the cleaning device is mounted on a robot and moved to a predetermined position of the flow control device,
Air is blown to the rotating brush by the air blow nozzle, the rotating brush is rotated by the motor, the cleaning device is brought closer to the flow control device by the robot operation, and the rotating brush and the scraper are brought into contact with the flow control device by the pressing mechanism, and the robot operates. First, the scraper is actuated according to the shape of the cleaning unit of the flow control device, and the scraper is brushed with a rotary brush while scraping off the mortar protruding with the scraper.
The mortar scraped off by the scraper and the residue brushed by a rotating brush are suction-removed by a vacuum mechanism.

[0010]

In the cleaning device of the flow control device according to the first aspect, the rotary brush is rotated by driving the motor, and scraps of mortar, tar and the like adhering to the flow control device are removed. The scraped-off residue is prevented from being scattered around by the rotating brush cover, and is sucked and collected by the vacuum mechanism. The rotating brush is pressed against the flow control device with a constant force by the pressing mechanism during the scraping operation, so that the reaction force during the scraping operation is absorbed. As a result, the safety and efficiency of the work are improved while the labor of the worker is reduced.

In the cleaning device of the flow control device according to the second aspect, after scraps of mortar and the like are scraped off by a scraper, brushing is performed by a rotating brush, and cleaning is performed more reliably and more efficiently. The rotating brush being brushed is cooled by blowing air to the rotating brush with an air blow nozzle, and the powdery residue remaining in the flow control device is blown off.

In the cleaning method of the flow control device according to the third aspect, when cleaning the flow control device at the time of plate replacement, the cleaning device is moved closer to the flow control device by a robot operation, and the rotary brush is moved by the pressing mechanism. Abut. Brushing is performed by the operation of the robot according to the shape of the cleaning unit of the flow control device, and the brushed scum is suctioned and removed by the vacuum mechanism. Thus, the cleaning operation can be performed in a hot state without cooling the ladle or the tundish, and it is possible to safely and prevent a decrease in production efficiency.

In the cleaning method of the flow control device according to the fourth aspect, when the flow control device is cleaned at the time of replacing the plate and the upper nozzle, the cleaning device is brought close to the flow control device by a robot operation, and the rotary brush and the pressing mechanism are moved by the pressing mechanism. The scraper contacts the flow control device. Then, the scraper is operated in accordance with the shape of the cleaning section of the flow control device by the operation of the robot, and while the mortar protruding from the scraper is scraped, brushing is performed with a rotary brush. The mortar scraped off by the scraper and the residue brushed by the rotating brush are suctioned off by the vacuum mechanism.
Thus, the cleaning operation can be performed in a hot state without cooling the ladle or the tundish, and it is possible to safely and prevent a decrease in production efficiency.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cleaning device and a cleaning method for a flow control device according to the present invention will be described below with reference to the drawings. This embodiment is applied to a flow control device for a tundish of a molten steel casting system.

An embodiment of the cleaning device according to claim 1 will be described with reference to FIG. First, the configuration of the cleaning device will be described.
FIG. 1 is a side view of the cleaning device 20. From the tip of the cleaning device 20, a rotary brush 21 for brushing the residue adhering to the flow control device, a motor 22 for driving the rotary brush 21 to rotate, and a rotary brush cover 30 provided to cover the rotary brush 21 And a vacuum mechanism 40 connected to the back of the rotating brush cover 30 to collect the slag.
And a pressing mechanism 50 for integrally pressing the rotary brush 21, the motor 22, the rotary brush cover 30, and the vacuum mechanism 40 against the flow control device with a constant force from the rear.
It is composed of The vacuum mechanism 40 includes an ejector 41 connected to the rear side of the rotating brush cover 30.
And a recovery tank 43 provided from an ejector 41 via a hollow cylindrical pipe 42. The pressing mechanism 50 includes a rotating brush 21, a motor 22,
A frame 51A fixedly supporting the rotating brush cover 30 and the vacuum mechanism 40, a frame 51B provided in parallel behind the frame 51A via a pin joint 52 and a link support 53, and a link support 53 at an intermediate position. And a constant torque spring 55 provided between the bracket 54 and the frame 51B for applying a contraction force, and a stopper 56.

Next, the operation of the embodiment constructed as described above will be described. When the motor 22 is started, the rotary brush 21 is rotated, and the rotary brush 21 scrapes off mortar 6 and tar and other residues adhered to the flow control device.
The rotating brush cover 23 prevents scum of the mortar 6 and the like scraped out by the rotating brush 21 from scattering around. The vacuum mechanism 40 sucks the dust such as mortar 6 in the rotary brush cover 30 with the ejector 41 and collects the dust from the ejector 41 into the collection tank 43 via the hollow cylindrical pipe 42. In the pressing mechanism 50, the frames 51A and 51B and the link support 53 function as parallel links, and a contraction force provided between the bracket 54 supporting the middle of the parallel links and the rear of the frame 51B acts. The frame 51A is driven forward by the torque spring 55, and the rotating brush 21 is pressed against the flow control device with a constant force, and the stopper 56 regulates the contraction force of the constant torque spring 55.

As described above, according to the present embodiment, the motor 2
By rotating the rotating brush 21 with 2, the mortar 6
And scraps of tar and the like can be scraped off. Since the rotating brush cover 30 is provided, it is possible to prevent the mortar 6 and the mortar 6 and the like scraped out of the mortar 6 and the like by the rotating brush 21 from scattering around. Since the vacuum mechanism 40 is provided behind the rotating brush 21,
The mortar 6 and the residue such as tar scraped off by the rotating brush 21 are collected without being scattered around, and the portions other than the cleaning portion of the flow control device can be cleaned without being soiled, and the working environment can be kept clean. In addition, the constant torque spring 5
5, the rotating brush 21 is pressed against the flow control device with a constant force to absorb a reaction force during the scraping operation of the rotating brush 21, and the rotating brush 21 is applied without exerting an excessive force on the rotating brush 21. The service life can be extended.

FIGS. 2 and 3 show a second embodiment of the present invention. First, the configuration of this part will be described. A circular cover 30 a is provided around the rotary brush 21 so as to cover the rotary brush 21, and a scraper 31 for scraping the mortar 6 is formed on a side portion of the circular cover 30 a.
A hollow cylindrical hole 32 for collecting the mortar 6 is formed behind the scraper 31. An air blow nozzle 33 for blowing air from behind the rotary brush 21 is provided on the circular cover 30a.
An air hose 34 is connected to the rear side 3 to supply air.

The operation of the above components will be described. The circular cover 30a covers the rotating brush 21 and prevents the mortar 6 and the residue such as tar scraped by the rotating brush 21 from scattering around. The scraper 31 scrapes the mortar 6, and the scraped mortar 6 is collected from the hollow cylindrical hole 32 through the pipe 42 into the collection tank 43. The air blow nozzle 33 sprays air on the rotating brush 21 and moves the cleaning device 20 slightly backward from the flow control device by a robot operation, thereby blowing air on the flow control device. The air hose 34 supplies air to the air blow nozzle 33.

As described above, according to the present embodiment, the circular cover 30a is provided so as to cover the rotary brush 21, so that the mortar 6 and the residue such as tar scraped off by the rotary brush 21 scatter around. Can be prevented. Since the rotary brush cover 30 is provided with the scraper 31 and the hollow cylindrical hole 32, the mortar 6 scraped off by the scraper 31 is collected through the hollow cylindrical hole 32, and cleans the portions other than the cleaning portion of the flow control device without soiling. Can keep the working environment clean. Since the air blow nozzle 33 is provided, the rotating brush 21 is cooled, adverse effects due to heat are prevented, and the life of the rotating brush 21 can be extended. Further, after the cleaning is completed, the cleaning device 20 is slightly retracted by the robot operation, so that the mortar 6 and the residue such as tar which could not be collected in the cleaning unit of the flow control device can be blown off.

An embodiment of the cleaning method according to claim 3 will be described with reference to FIGS. First, the configuration of FIG. 4 will be described. The tundish 2 is rotated by 90 degrees by a tilting device 80 on its side to tilt the flow control device 3. A robot 70 equipped with the cleaning device 20 is installed behind the tilted flow control device 3 and moved to a predetermined position of the tilted flow control device 3 to move the cleaning device 2.
The zero rotation brush 21 is configured to clean the flow control device 3. The cleaning device 20 is configured to be detachable from the robot 70 via the auto tool changer 60.

Next, a cleaning method will be described. The tundish 2 is rotated 90 degrees by the tilting device 80 and the flow control device 3
After the cover 11 of the flow control device 3 is opened in a state in which the cleaning device 20 is tilted, and the plates 8A and 8B are removed, the cleaning device 20 is removed.
Is mounted on the robot 70. The robot 70 equipped with the cleaning device 20 moves to the front of the flow control device 3 so that the rotating brush 21 comes first, and blows air from the air blow nozzle 33 to the rotating brush 21 in a state where the cleaning device 20 is horizontal. The rotating brush 21 is rotated by the motor 22,
Further, the cleaning device 20 is brought close to the flow control device 3 by the operation of the robot 70, and the rotating brush 21 is first pressed by the pressing mechanism 50.
Is brought into contact with the flow control device 3, brushing is performed in accordance with the shape of the cleaning unit of the flow control device 3 by the operation of the robot 70, and the brushed scum is suctioned and removed by the vacuum mechanism 40 (FIG. 5A, (B)). Next, the robot 70
The cleaning device 20 is slightly retracted by the operation of
Is stopped, and air is blown to the flow control device 3 from the gap of the rotating brush 21 by the air blow nozzle 33 (FIG. 5).
(C)).

As described above, according to this embodiment, brushing is performed by the rotating brush 21 and the brushed scum is collected by the vacuum mechanism 40. Can be cleaned without leaving. Since the air blow is performed by the air blow nozzle 33, the powdery residue remaining in the flow control device 3 can be blown off. Further, since the cleaning device 20 is mounted on the robot 70 for cleaning, the cleaning of the flow control device 3 is performed without the intervention of an operator, and the cleaning operation can be performed in a hot state without cooling the tundish. Can,
It is safe and can prevent a decrease in production efficiency.

An embodiment of the cleaning method according to claim 4 will be described with reference to FIGS. First, the configuration according to the present embodiment will be described. As described above, the tundish 2 is configured to be rotated 90 degrees by the tilting device 80 on the side thereof to tilt the flow control device 3. A robot equipped with the cleaning device 20 is installed behind the flow control device 3 tilted, moved to a predetermined position of the flow control device 3 in the tilted state, and the rotating brush 21 and the rotating brush of the cleaning device 20 are rotated. The flow rate control device 3 is cleaned by a scraper 31 provided on the cover 30. The cleaning device 20 is configured to be detachable from the robot 70 via the auto tool changer 60.

Next, a cleaning method will be described. FIG. 6 shows a rotary brush cover 30 for removing the plate and the upper nozzle, applying a new mortar 6 to the upper nozzle 7, mounting the mortar 6 on the nozzle mounting portion of the flow control device, and cleaning with the cleaning device 20.
7 is a front view showing the operation of the rotary brush 21, the scraper 31, and the like as viewed from the flow control device side. While the tundish 2 was rotated 90 degrees by the tilting device 80 and the flow control device 3 was tilted, the cover 11 on the front surface of the flow control device 3 was opened as shown in FIG. 6, and the plates 8A and 8B were removed. Thereafter, the cleaning device 20 is mounted on the robot 70. The robot 70 equipped with the cleaning device 20 moves the flow control device 3 so that the rotating brush 21 comes first.
In the state where the cleaning device 20 is horizontal,
Air is blown from the air blow nozzle 33 to the rotating brush 21, the rotating brush 21 is rotated leftward by the motor 22 as shown in FIG. 7, and the cleaning device 20 is moved closer to the flow control device 3 by the operation of the robot 70. At 50, the scraper 31 provided on the rotating brush 21 and the rotating brush cover 30 is brought into contact with the outer periphery of the nozzle mounting portion of the flow control device 3, and the robot operates so that the scraper 31 traces the outer periphery of the nozzle mounting portion first. Rotate the brush 21 to the left and scrape the mortar 6 with the scraper 31.
Then, after scraping the mortar 6 with the scraper 31, brushing is performed, and the mortar 6 scraped with the scraper 31 and the residue brushed with the rotating brush 21 are suctioned and removed by the vacuum mechanism 40. Next, the cleaning device 20 is slightly retracted by the operation of the robot 70 in the same manner as the method shown in FIG.
Then, air is blown to the flow control device 3 from the gap of the rotating brush 21.

As described above, according to the present embodiment, the mortar 6 is scraped off by the scraper 31 provided on the rotating brush cover 30 and then brushed by the rotating brush 21 to remove the mortar 6 and the brushed slag. Is collected by the vacuum mechanism 40, so that the cleaning can be performed without leaving the mortar 6 and tar or the like in the flow control device 3. Since the air blow is performed by the air blow nozzle 33, the powdery residue remaining in the flow control device 3 can be blown off. Further, since the cleaning device 20 is mounted on the robot 70 for cleaning, the cleaning of the flow control device 3 is performed by a mechanical operation without the intervention of an operator, and the tundish is kept in a hot state without cooling. Cleaning work can be performed, and safety can be prevented from lowering production efficiency.

[0027]

As described above, according to the cleaning device of the flow control device according to the first aspect, there is provided a cleaning device for cleaning a flow control device of a ladle or a tundish of a molten steel casting system, wherein the flow control device is provided. A rotary brush for brushing the residue adhering to the device, a motor for rotating and driving the rotary brush, a rotary brush cover provided so as to cover the rotary brush, and a brush connected to the rear of the rotary brush cover for brushing; Since a vacuum mechanism for collecting the peeled residue and a pressing mechanism for pressing the rotary brush, the motor, the rotary brush cover and the vacuum mechanism integrally with the flow control device with a constant force are provided, the flow control of the rotary brush is performed. Pressing with a constant force on the device, brushing the residue adhering to the flow control device, It is possible to mechanically safety and efficiency of the work with the operator's labor reduced can perform a series of cleaning operations of the process of sucking recovery without scattered circumference.

According to a second aspect of the present invention, the rotary brush cover has a scraper for scraping the slag such as mortar and an air blow nozzle for blowing air to the rotary brush. Therefore, brushing is performed with a rotating brush after scraping off mortar and other residues with a scraper.Also, the rotating brush being brushed is cooled and powdery residue remaining in the flow control device is blown off, so that it is more reliable and more efficient. Good cleaning can be performed.

According to a third aspect of the present invention, there is provided a cleaning method for cleaning a flow control device when replacing a ladle or a tundish plate of a molten steel casting system using the cleaning device according to the second aspect. A method, wherein the lower nozzle and the plate are removed while the ladle or tundish is rotated 90 degrees sideways and the flow control device is tilted, and the cleaning device is mounted on a robot, and the predetermined flow rate of the flow control device is determined. Position, the air is blown to the rotating brush by the air blow nozzle, the rotating brush is rotated by the motor, the cleaning device is brought closer to the flow control device by the robot operation, and the rotating brush is brought into contact with the flow control device by the pressing mechanism. , Brushing according to the shape of the cleaning part of the flow control device by the robot operation, and the brushed residue is suctioned and removed by the vacuum mechanism As a result, it is possible to clean the flow control device when replacing the plate by a mechanical operation without cooling the ladle or tundish while maintaining the hot state, thereby reducing a large amount of labor of the operator and reducing the temperature under high heat. It is possible to improve work safety, reduce a large amount of energy consumption, and improve work efficiency.

According to a fourth aspect of the present invention, there is provided a method for cleaning a flow control device for replacing a ladle or a tundish plate and an upper nozzle of a molten steel casting system using the cleaning device according to the second aspect. A cleaning method for cleaning, in which the plate and the upper nozzle are removed while the ladle or tundish is rotated 90 degrees sideways and the flow control device is tilted, and mortar is newly applied to the upper nozzle and the flow rate is adjusted. Attached to the control device, the cleaning device is mounted on a robot and moved to a predetermined position of the flow control device,
Air is blown to the rotating brush by the air blow nozzle, the rotating brush is rotated by the motor, the cleaning device is brought closer to the flow control device by the robot operation, and the rotating brush and the scraper are brought into contact with the flow control device by the pressing mechanism, and the robot operates. First, the scraper is actuated according to the shape of the cleaning unit of the flow control device, and the scraper is brushed with a rotary brush while scraping off the mortar protruding with the scraper.
Since the mortar scraped off by the scraper and the slag brushed by the rotary brush are removed by suction with a vacuum mechanism, the ladle or tundish is kept hot while the plate and upper nozzle are replaced while the flow rate control device is cleaned. Can be performed by a mechanical operation, and the same effect as the effect of the invention described in claim 3 can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a cleaning device of a flow control device according to the present invention.

FIG. 2 is a front view of a rotary brush and a rotary brush cover in FIG. 1;

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a view showing a state in which the tundish is rotated by 90 degrees during cleaning of the flow control device for the tundish according to the embodiment.

FIG. 5 is a view for explaining a method of cleaning the flow control device at the time of plate replacement in the state of FIG. 4;

FIG. 6 is a side view for explaining a method of cleaning the flow rate control device when replacing the plate and the upper nozzle according to the embodiment.

FIG. 7 is a front view of the rotating brush and the rotating brush cover of FIG. 6;

FIG. 8 is a configuration diagram of a conventional molten steel casting system in iron making.

FIG. 9 is a configuration diagram around a flow control device of a conventional molten steel casting system in iron making.

FIG. 10 is a perspective view showing a conventional flow control device cleaning method.

[Explanation of symbols]

 Reference Signs List 1 ladle 2 tundish 3 flow control device 6 mortar 7 upper nozzle 8A, 8B plate 20 cleaning device 21 rotating brush 22 motor 30 rotating brush cover 31 scraper 33 air blow nozzle 40 vacuum mechanism 43 collection tank 50 pressing mechanism 55 constant torque spring 70 robot 80 Tilt device

──────────────────────────────────────────────────続 き Continued on the front page (72) Nobuyoshi Hiroki 1850 Minato, Wakayama-shi, Wakayama Sumitomo Metal Industries, Ltd. Inside Wakayama Works (72) Inventor Yoshinobu Ishikawa 1-Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu Plant (72) Inventor Ryoji Takahashi 2-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Keihin Works, Toshiba Corporation (56) References JP-A-8-19857 (JP, A) JP-A-7- 305962 (JP, A) JP-A-6-154965 (JP, A) JP-A-6-63730 (JP, A) JP-A-4-28475 (JP, A) JP-A-64-5660 (JP, A) JP-A-6-48943 (JP, U) JP-A-1-139968 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) B22D 43/00 B22D 11/10 340

Claims (4)

(57) [Claims] 1. A cleaning device for cleaning a flow control device of a ladle or a tundish of a molten steel casting system, comprising: a rotary brush for brushing scum adhering to the flow control device; and a rotary drive for rotating the rotary brush. A motor, a rotating brush cover provided so as to cover the rotating brush, a vacuum mechanism connected to the back of the rotating brush cover to collect the flakes removed by brushing, the rotating brush, the motor, and the rotating brush cover And a pressing mechanism for integrally pressing the vacuum mechanism against the flow control apparatus with a constant force. 2. The flow rate according to claim 1, wherein the rotary brush cover is provided with a scraper for scraping off the slag such as mortar, and an air blow nozzle for blowing air to the rotary brush. Cleaning device for control device. 3. A cleaning method for cleaning a flow control device when replacing a ladle or tundish plate of a molten steel casting system using the cleaning device according to claim 2, wherein the lower nozzle and the plate are removed. The cleaning device is mounted on the robot and moved to a predetermined position of the flow control device, air is blown on the rotating brush by an air blow nozzle, the rotating brush is rotated by a motor, and the cleaning device is brought closer to the flow control device by robot operation, Cleaning of the flow control device, characterized in that the rotating brush is brought into contact with the flow control device by a pressing mechanism, brushing is performed by a robot operation in accordance with the shape of the cleaning portion of the flow control device, and the brushed scum is suctioned and removed by a vacuum mechanism. Method. 4. A cleaning method for cleaning a ladle or a tundish plate and an upper nozzle of a molten steel casting system using a cleaning device according to claim 2, wherein the ladle or the tundish is replaced. The plate and the upper nozzle are removed while the flow control device is tilted by turning 90 degrees sideways, the mortar is newly applied to the upper nozzle, and is attached to the flow control device. Mounted and moved to a predetermined position of the flow control device, blow air to the rotating brush with an air blow nozzle, rotate the rotating brush with a motor, move the cleaning device closer to the flow control device by robot operation, and press the rotating brush with a pressing mechanism The scraper is brought into contact with the flow control device, and the scraper is first operated by the robot operation according to the shape of the cleaning section of the flow control device. The scraper is brushed with a rotary brush while scraping off the mortar protruding with the scraper, and the mortar scraped by the scraper and the slag brushed by the rotary brush are suctioned and removed by a vacuum mechanism. Cleaning method.