JP2883531B2 - Tuyere cleaning device and its cleaning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting system for molten steel in iron making, and more particularly to a tuyere cleaning system for automatically cleaning the inner diameter of a tuyere block adjacent to a flow control device for controlling the flow rate of molten steel. The present invention relates to an apparatus and a cleaning method thereof.

[0002]

2. Description of the Related Art A conventional tuyere cleaning device will be described below with reference to the drawings. The conventional continuous casting system in steelmaking
Ladle 1 or tundish 2 as shown in FIG.
The flow control device 3 is provided at the bottom of the. As shown in FIG. 12, a tuyere block 4 having a hollow cylindrical shape is provided inside the ladle 1 or tundish 2 so as to be surrounded by a refractory brick 5 having a block shape. A nozzle 7 is mounted in the hollow cylindrical tuyere block 4 via a mortar 6.

A flow control device 3 is provided adjacent to the hollow cylindrical tuyere block 4, and two or three refractory plates 8 are housed in the flow control device 3. . One of the refractory plates 8 is accommodated in a slider 9 so as to be slid and guided. A cylinder 10 is connected to the end of the slider 9, and the operation of the cylinder 10 slides the slider 9 and one of two or three refractory plates 8.

After storing the plate 8, the flow control device 3
While the front cover 11 of the main body is closed, the plate 8 is configured to apply pressure to each other by a spring member (not shown). In the flow control device 3,
The molten steel is poured from the ladle 1 to the tundish 2 while controlling the outflow of the molten steel in the ladle 1 or the tundish 2, and the molten steel is further configured to be supplied to a mold (not shown). I have.

Next, a conventional tuyere cleaning operation will be described. During continuous casting, those that are in direct contact with the molten steel, such as the nozzle 7 and the plate 8, are used in severe conditions and are eroded severely and easily damaged. Therefore, the service life is short, and frequent replacement is required.

When the nozzle 7 and the plate 8 are exchanged, the ladle 1 or the tundish 2 is conveyed to a predetermined position for exchanging the nozzle 7 in the flow control device after the molten steel has flowed out, and as shown in FIG. Alternatively, the tundish 2 is rotated 90 ° by a tilting device (not shown), and the flow control device 3 is placed in a hot state immediately after tilting the flow control device 4 installed at the ladle 1 or the bottom of the tundish 2. The front cover 11 is opened, the plate 8 is removed, and the nozzle 7 is taken out. The state of the tuyere immediately after taking out the nozzle 7 is that the mortar 6 is stuck to the inner diameter of the tuyere block in a hardened state, and the tip of the tuyere is eroded by molten steel in the mortar part. Cleaning was performed by attaching molten steel and mortar with a tool such as a chipper 12.

[0007]

The above-mentioned series of tuyere cleaning work is performed manually by several persons in a working environment under high heat. However, once the ladle or tundish is cooled, it is preheated again. Therefore, there is a problem that it takes time and the workability is reduced.

For this reason, the cleaning operation of the flow control device main body and the tuyere block is performed in the hot state immediately after the molten steel flows out. The state of the tuyere from which the cover of the flow control device main body is opened and the nozzle is removed, as well as the ladle or tundish, is intense radiant heat and involves danger. Since the mortar is in a powder state, it is also an operation in a state in which dust flies and vibrates. This cleaning is done several times a day,
It takes a lot of effort, it is difficult to ensure the safety of workers,
There are problems such as a large degree of worker fatigue.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a tuyere cleaning device and a cleaning method thereof capable of reducing a great amount of labor by a mechanical operation. It is another object of the present invention to provide a tuyere cleaning device and a cleaning method thereof capable of improving the safety of work under high heat and improving the work efficiency.

[0010]

According to a first aspect of the present invention, there is provided a tuyere cleaning apparatus for a flow control device for a ladle or tundish in a continuous casting system. A cutter having the same shape as the section and a brush having the same shape, a rotating mechanism for rotating and driving the same shape cutter and the same shape brush, and an air blow nozzle.

According to a second aspect of the present invention, in the tuyere cleaning device of the flow control device of the continuous casting system according to the first aspect, the cutter having the same shape as the cylindrical hollow portion of the tuyere sends out the cutting chips by rotation. When a reaction force is applied during cleaning, the cutter slides in the axial direction and escapes when a reaction force is applied during cleaning.

According to a third aspect of the present invention, in the tuyere cleaning device of the flow control device of the continuous casting system according to the first aspect, the cutter having the same shape as the cylindrical hollow portion of the tuyere is cleaning the tip of the cutting portion. When a reaction force is applied to the cutter, the chips individually slide toward the center of the cutter and escape.

According to a fourth aspect of the present invention, in the tuyere cleaning device of the flow control device of the continuous casting system according to the first aspect, the cutter having the same shape as the cylindrical hollow portion of the tuyere cools a chip at a cutting portion. It is characterized by comprising a cooling mechanism and a mechanism for air blowing the cut chips.

According to a fifth aspect of the present invention, in the method for cleaning a tuyere of a flow control device for a ladle or a tundish of a continuous casting system, the ladle or the tundish of the continuous casting system is rotated by 90 degrees, and the flow control device is rotated. The tuyere cleaning device is mounted on the robot in a tilted state, the robot is moved to the cleaning position of the flow control device by the robot operation, and the tuyere is cleaned with a cutter having the same shape as the cylindrical hollow portion of the tuyere. The tuyere is cleaned with a brush having the same shape as the cylindrical hollow portion.

[0015]

The tuyere cleaning device according to the first aspect of the present invention is a cutter having the same shape as the cylindrical hollow portion of the tuyere, which erodes the mortar hardened around the tuyere and the mortar at the tip of the tuyere. The mortar is scraped off, the thin steel remaining around the tuyere is scraped off with a brush of the same shape as the cylindrical hollow part of the tuyere, and the cutter and brush are driven to rotate by a rotating mechanism. The air blow nozzle blows off the mortar in powder form.

According to a second aspect of the present invention, there is provided a tuyere cleaning apparatus according to the present invention, in which a chip is sent out while scraping mortar by a rotation of a cutter having the same shape as a cylindrical hollow portion of the tuyere, and a reaction force is applied during cleaning. , The cutter slides back in the axial direction.

In the tuyere cleaning device according to the third aspect of the present invention, the finely scattered tips of the cutter having the same shape as the cylindrical hollow portion of the tuyere are individually cut off when a reaction force is applied during cleaning. Slide toward the center.

According to a fourth aspect of the present invention, there is provided a tuyere cleaning apparatus, wherein a chip attached to a cutter having the same shape as a cylindrical hollow portion of a tuyere is air-cooled while cutting, and air blown by the air blow mechanism to blow air. .

According to a fifth aspect of the present invention, there is provided a tuyere cleaning method in which a ladle or a tundish is rotated sideways by 90 degrees, the flow control device is tilted, and the tuyere cleaning device is mounted on the robot. Move to the cleaning position of the flow control device with, clean with a cutter of the same shape as the cylindrical hollow portion of the tuyere of the tuyere cleaning device, and then clean the tuyere with a brush of the same shape as the cylindrical hollow portion of the tuyere .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a tuyere cleaning device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the brush.

As shown in FIG. 1, the tuyere cleaning device 20 comprises two rotating mechanisms 22 fixed to the frame 21 in a 180-degree opposite direction and horizontally at different levels, and the two rotating mechanisms 2.
At one end of 2, a cutter 3 having the same shape as the cylindrical hollow part of the tuyere
0 (right side), a brush 40 (left side) having the same shape as the cylindrical hollow portion of the tuyere provided at the other end, a cutter 30 and a dustproof cover 50 attached to the back of the brush 40, respectively.
An air blow nozzle 60 is provided at two locations above and below the dustproof cover 50 on the brush 40 side, and an air hose 61 that supplies air to the air blow nozzle 60.

As shown in FIG. 2, the brush 40 has a shaft 4 having a wire twisted around the rotation center of the brush 40.
1, several hundred piano wires 42 extending in the radial direction, which are fixed by twisting the wires of the shaft 41, and a pipe 43 that is crimp-fixed to the tip of the piano wire 42 and fixed to the tip of the pipe 43. And a ball 44 made of the same.

Next, the operation of the tuyere cleaning device of this embodiment will be described. As shown in FIG. 1, two rotating mechanisms 22 fixed to the frame 21 of the tuyere cleaning device 20 in a 180-degree opposite direction and horizontally at different levels are respectively rotated clockwise by the cutter 30.
And the brush 40 is rotated. The cutter 30 (right side) having the same shape as the cylindrical hollow portion of the tuyere performs rough cutting and removal of the mortar 6 attached to the inner diameter of the tuyere block and the molten steel eroded in the mortar 6 by rotating the cutter 30. The brush 40 (left side) having the same shape as the cylindrical hollow portion of the tuyere is provided with a ball 44 provided at the tip of the brush 40 by rotation of the brush 40.
The mortar 6 attached to the inner diameter of the tuyere block 4 is scraped off by a centrifugal force while being beaten, and finish removal is performed.

The upper and lower air blow nozzles 60 attached to the dustproof cover 50 on the brush 40 side receive air supply from the air hose 61 and blow the powdered mortar by the rotation of the brush 40. Further, the dust cover 50 prevents the mortar 6 from scattering toward the front side of the tuyere cleaning device 20 when the mortar 6 is removed by the rotation of the cutter 30 and the brush 40.

Further, since the dustproof cover 50 is provided behind the cutter 30 and the brush 40, it is possible to prevent the powdered mortar 6 from scattering toward the front of the tuyere cleaning device 20. Further, since the air blow nozzle 60 is provided on the dustproof cover 50 on the brush 40 side and the mortar 6 in the form of powder is ejected, the rotation resistance of the brush 40 during rotation can be reduced. Further, since the entire brush 40 is cooled by the air jetted from the air blow nozzle 60, the brush 40 can prevent adverse effects due to heat.

As described above, according to the present embodiment, the rough cutting of the mortar 6 can be removed by rotating the cutter 30 by the rotating mechanism 22. Further, since the brush 40 is rotated by the rotating mechanism 22, when the spherical refractory ball 44 hits the inner surface of the tuyere, that is, the mortar 6, the wire of the shaft 41 of the brush 40 is twisted and fixed in the radial direction. Hundreds of the piano wires 42 are bent, and the mortar 6 can be removed in powder form while the ball 44 hits the mortar 6 while following the inner surface of the tuyere.

FIG. 3 is a plan view of a slide mechanism of a cutter of a nozzle mounting device of a tuyere cleaning device according to another embodiment of the present invention, and FIG. 4 is a sectional side view of the slide mechanism of the cutter. ◎ As shown in FIGS. 3 and 4, the slide mechanism of the cutter of the nozzle mounting device includes a chip 31 spirally arranged in a direction in which the chips are sent out by rotation, and a cutter 3.
Slide shaft 3 connected to cutter 30 behind 0
2, several guide pins 33 fixed vertically toward the axial center of the slide shaft 32, a spring 34 attached to the rear of the slide shaft 32, and an elongated hole that covers the spring 34 and slides the guide pin 33. Spiral guide mechanism 35 and slide shaft 32
And a slide case 36 that is connected to and fixed to the rotating mechanism 22.

Next, the operation of the nozzle mounting device of the tuyere cleaning device of this embodiment will be described. The power generated by the rotation mechanism 22 is transmitted to the slide case 36 and the guide pins 33 of the guide structure 35, and rotates the cutter 30 via the slide shaft 32. At this time, the spring 34 presses the slide shaft 32 forward to regulate the retreat of the entire cutter 30.

By rotating the cutter 30 in this manner, the tip 31 scrapes the molten steel eroded into the mortar 6 having the inner diameter of the tuyere, and sends out the scraped mortar 6. If the mortar 6 and the molten steel eroded in the mortar 6 adhere to the tuyere and cannot be scraped off even if the tip 31 is scraped off, the tuyere cleaning device 20 receives a reaction force, and the spring force of the spring 34 When the above-mentioned force is generated, the slide shaft 32 connected to the cutter 30 retreats while sliding the slide case 36 toward the tuyere cleaning device 20, whereby the spring 34 contracts, and the guide pin 33 becomes a spiral guide. It retreats while sliding in the groove 35.

As described above, according to the present embodiment, the power of the rotating mechanism 22 is transmitted to the cutter 30, and
The mortar 6 fixed to the inner diameter of the tuyere and the molten steel eroded in the mortar 6 can be scraped and removed by the tip 31 provided in a spiral shape by the rotation of. Mortar 6
When the molten steel eroded in the mortar 6 adheres to the tuyere and cannot be scraped off even when the tip 31 is scraped, the entire cutter can be retracted, so that the reaction force during the scraping operation can be absorbed. .

FIG. 5 is a plan view of a tip sliding mechanism of a tuyere cleaning device according to still another embodiment of the present invention, and FIG. 6 is a side sectional view of the tip sliding mechanism. As shown in FIG. 5 and FIG.
0, a spring 37 provided below the holder 37,
And a replaceable blade 39 attached to the end in the rotation direction of No. 7.

Next, the operation of the tip sliding mechanism of the tuyere cleaning device of this embodiment will be described. ◎ The holder 37 is integrated with the replaceable blade 39, and is protruded from the surface of the cutter 30 by the spring 38.
By the rotation of the cutter 30, the blade 39 scrapes the mortar 6 and the molten steel eroded into the mortar 6.

Further, when the mortar 6 and the molten steel eroded in the mortar 6 are fixed to the tuyere, and the molten steel cannot be scraped off by the chip 31, the tuyere cleaning device 20 receives a reaction force. When a force greater than the spring force of the spring 38 is generated, the spring 38 contracts, and the holder 37 slides toward the center of the cutter 30.

As described above, according to this embodiment, the mortar 6
And when the molten steel eroded in the mortar 6 adheres to the tuyere and cannot be scraped off even if the tip 31 is scraped, the tip 31 can slide in the center direction of the cutter 30.
The reaction force during the scraping operation can be absorbed.

FIG. 7 is a sectional view of a cutter cooling mechanism and an air blow mechanism of a tuyere cleaning device according to another embodiment of the present invention. As shown in FIG. 7, a space 70 is formed in a pipe shape from the slide shaft 32 to the cutter 30, and the space 70 is configured to flow air. The space 70 a communicates with the bottom of the tip 31 and is configured to eject air from the front surface of the blade 39. Also, the space 70b
Is configured to pass through the center of the cutter 30 and communicate with the front surface of the cutter 30, and to eject air radially from the middle.

Next, the operation of the tuyere cleaning device of this embodiment will be described. The space 70 a vacated in a pipe shape communicates with the bottom of the chip 31 and blows out the air passing through the space 70 a from the front surface of the blade 39. The space 70b passes through the center of the cutter 30 and communicates with the front surface of the cutter 30 to radially blow air passing through the space 70b.

As described above, according to the present embodiment, the space 70a is provided in a pipe shape from the slide shaft 32 to the tip 31 of the cutter 30, so that air passes through the space 70a and the spring 38 at the bottom of the tip 31. In addition, the blade 39 can be cooled to prevent mortar from adhering to the front surface of the blade 39. Therefore, the influence of the heat of the spring 38 and the blade 39 can be prevented. The space 70
b is passed radially from the middle of the cutter 30 through the center of the cutter 30 and is provided radially from the middle, so that air can pass through the space 70b and be ejected to the front of the cutter 30.
The powdery mortar 6 remaining on the front side from 0 can be blown off.

FIG. 8 is a plan view of a tuyere cleaning device according to another embodiment of the present invention, FIG. 9 is a side view showing the arrangement of a tuyere cleaning method, and FIG. 10 shows the operation of the tuyere cleaning device. It is a side view. As shown in FIG. 8, the tundish 2 is rigidly rotated by 90 ° by a tilting device 80 beside the tundish 2 to tilt the flow control device 3. A robot 90 equipped with a tuyere cleaning device 20 is installed behind the tilted flow control device 3, and the tuyere cleaning device 20 is mounted on the robot 90 as shown in FIG. The tuyere cleaning device 20 is configured to handle a predetermined position of the tuyere cleaning device 20 and clean the inner cylindrical hollow surface of the tuyere block 4.

Further, as shown in FIG.
In this operation, the tuyere cleaning device 20 is rotated horizontally by 180 degrees, and the inner surface of the cylindrical hollow of the tuyere block 4 is cleaned by the brush 40. The tuyere cleaning device 20 is configured to be detachable from the robot via the auto tool changers 91a and 91b. The robot 90 is provided with an electromagnetic valve 100 so that air can be controlled.

Next, the tuyere cleaning method of this embodiment will be described. After rotating the tundish 2 by 90 degrees with the tilting device 80 and removing the nozzle with the flow control device 3 tilted, the tuyere cleaning device 20 is mounted on the robot 90 via the auto tool changers 91a and 91b. . The robot 90 equipped with the tuyere cleaning device 20 moves to the front of the flow control device 3 so that the cutter 30 of the tuyere cleaning device 20 comes first, and controls the flow rate from the state where the tuyere cleaning device 20 is horizontal. The cutter 30 moves forward toward the tuyere block 4 adjacent to the device 3 while starting to rotate.

At the same time as the cutter 30 starts rotating, air is ejected from the tip 31 of the cutter 30 and the tip of the cutter 30. When the cutter 30 reaches a predetermined position of the tuyere block 4, the tuyere cleaning device 20 is in a horizontal state. , And the tuyere cleaning device 20 is rotated 180 degrees horizontally, and moved to the front of the flow control device 3 so that the brush 40 comes first,
The brush 40 moves forward while starting rotation of the brush 40 toward the tuyere block 4 adjacent to the flow rate control device 3, and the tuyere cleaning device 20 is rotated by 180 degrees horizontally so that the brush 40 starts rotating and the cutter 30 starts rotating. The blown air is switched by the solenoid valve 100 and the air is blown from the air blow nozzle 60. After completion of the tuyere cleaning, the tuyere cleaning device 20 is retracted in a horizontal state by the operation of the robot 90, and the air blown from the air blow nozzle 60 is stopped.

As described above, according to the present embodiment, the cutter 3
Since the cleaning of the brush 40 is performed after the cleaning of the mortar 6, the mortar 6 and the molten steel eroded in the mortar 6 can be easily removed. Also, since the tuyere cleaning device 20 ejects air from the time of cleaning the cutter 30 and the brush 40 until the tuyere cleaning device 20 retreats from the tuyere block 4,
Cleaning can be performed without leaving the mortar 6 and the molten steel eroded in the mortar 6 in the cylindrical hollow portion of the tuyere block 4. As described above, the tuyere cleaning operation can be performed without the intervention of an operator by using the robot 90 and the tuyere cleaning device 20.

[0043]

As described above, according to the present invention,
By using the robot and the tuyere cleaning device, the tuyere cleaning operation can be performed by mechanical operation without the intervention of an operator, and thus the cleaning operation efficiency is improved. In addition, workers no longer accidentally come into contact with the hot ladle or tundish and flow control device as before.
This has the effect of improving safety.

Further, according to the tuyere cleaning device of the first aspect, since the dustproof cover is provided behind the cutter and the brush, there is an effect that the flow rate control device can be cleaned without soiling during cleaning. Since the air blow nozzle is provided behind the brush, there is an effect of cooling the entire brush, and there is an effect that heat influence in hot work is small.

According to the tuyere cleaning device of the second aspect, since the tip of the cutter is spirally arranged, the mortar or the like scraped off by the rotation of the cutter is sent out. Therefore, there is an effect that cleaning can be performed without soiling the flow control device. During cleaning, the mortar and molten steel eroded into the mortar adhere to the tuyere, and even if the chip is scraped, if the chip cannot be scraped, the entire cutter can be retracted, absorbing the reaction force during the scraping operation And has the effect of preventing damage to the device.

According to the tuyere cleaning device of the third aspect, if the mortar and the molten steel eroded into the mortar adhere to the tuyere during cleaning and the chip cannot be scraped off even if the chip is scraped off, the tip is cut by the cutter. Is slidable in the center direction, so that the reaction force during the scraping operation can be absorbed, and there is an effect of preventing breakage of the blade.

According to the tuyere cleaning device described in claim 4,
Since a space is provided in a pipe shape from the slide shaft to the tip of the cutter, air passes through the space, cooling the spring and the blade at the bottom of the chip, preventing mortar from adhering to the front of the blade, The effect of heat can be prevented. In addition, since the space passes radially from the center of the cutter to the front of the cutter and is provided radially from the middle, air can pass through the space and blow out to the front of the cutter, so the effect of blowing off the powdery mortar remaining on the front of the cutter from the cutter is effective. is there.

According to the tuyere cleaning method of the fifth aspect, the brush cleaning is performed after the cutter cleaning, so that the mortar and the molten steel eroded in the mortar can be removed. Since the air is blown out until the tuyere cleaning device retracts from the tuyere block, cleaning can be performed without leaving mortar and molten steel eroded in the mortar in the cylindrical hollow portion of the tuyere block.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing a configuration of a brush of the tuyere cleaning device of FIG. 1;

FIG. 3 is a plan view showing a slide mechanism of a cutter of a tuyere cleaning device according to another embodiment of the present invention.

FIG. 4 is a side sectional view showing a slide mechanism of a cutter of the tuyere cleaning device of FIG. 3; .

FIG. 5 is a plan view showing a tip sliding mechanism of a tuyere cleaning device according to still another embodiment of the present invention.

FIG. 6 is a side sectional view showing a tip sliding mechanism of the tuyere cleaning device of FIG. 5;

FIG. 7 is a cross-sectional view illustrating a cutter cooling mechanism and an air blow mechanism of a tuyere cleaning device according to another embodiment of the present invention.

FIG. 8 is a plan view showing a tuyere cleaning method according to still another embodiment of the present invention.

FIG. 9 is a side view showing the configuration of the tuyere cleaning method of FIG.

FIG. 10 is a side view showing the operation of the tuyere cleaning method of FIG.

FIG. 11 is a configuration diagram of a conventional continuous casting system in iron making.

FIG. 12 is a configuration diagram around a flow control device of a continuous casting system in conventional iron making.

FIG. 13 is a perspective view of a conventional tuyere cleaning method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ladle, 2 ... Tundish, 3 ... Flow control device, 4 ... Tuyere block, 5 ... Refractory brick, 6 ... Mortar,
7 Nozzle, 8 Plate, 9 Slider, 10 Cylinder, 11 Cover, 12 Chipper, 20 Tuyere Cleaning Device, 21 Frame, 22 Rotary Mechanism, 30 Cutter, 31 Chip, 32 Slide shaft, 33: guide pin, 34, 38: spring, 35: guide groove,
36: slide case, 37: holder, 39: blade, 4
0: brush, 41: shaft, 42: piano wire, 43
... pipe, 44 ... ball, 50 ... dust cover, 60 ... air blow nozzle, 61 ... air hose, 70, 70a, 7
0b: space, 80: tilting device, 90: robot, 91
a, 91b: Auto tool changer, 100: Solenoid valve.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nozomi Masui 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (56) References JP-A-6-320258 (JP, A) JP JP-A-6-154965 (JP, A) JP-A-6-154966 (JP, A) JP-A-6-234064 (JP, A) JP-A-63-141341 (JP, U) JP-A-6-48943 (JP) , U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B22D 11/10 310 B22D 43/00

Claims (5)

(57) [Claims] 1. A tuyere cleaning device for a flow control device for a ladle or tundish in a continuous casting system, comprising: a cutter and a brush having the same shape as the cylindrical hollow portion of the tuyere; and a cutter and a brush having the same shape as the cylindrical hollow portion of the tuyere. A tuyere cleaning device for a flow control device of a continuous casting system, comprising: a rotating mechanism that rotates and an air blow nozzle. 2. A tuyere cleaning device for a flow control device of a continuous casting system according to claim 1, wherein the cutter having the same shape as the cylindrical hollow portion of the tuyere spirally inserts chips in a direction in which chips are sent out by rotation. A tuyere cleaning device characterized in that the cutters slide in the axial direction and escape when a reaction force is applied during cleaning. 3. A tuyere cleaning device for a flow control device of a continuous casting system according to claim 1, wherein the cutter having the same shape as the cylindrical hollow portion of the tuyere receives a reaction force while the tip of the cutting portion is being cleaned. In this case, the tuyere cleaning device is characterized in that the chips individually slide toward the center of the cutter and escape. 4. The tuyere cleaning device for a flow control device of a continuous casting system according to claim 1, wherein the cutter having the same shape as the cylindrical hollow portion of the tuyere is provided with a cooling mechanism for cooling a chip at a cutting portion, and a cutting mechanism. A tuyere cleaning device, comprising: a mechanism for air blowing chips. 5. A tuyere cleaning method for a flow control device for a ladle or tundish of a continuous casting system, wherein the ladle or tundish of the continuous casting system is rotated by 90 degrees and the flow control device is tilted. The tuyere cleaning device is mounted on the robot, moved by the robot operation to the cleaning position of the flow rate control device, and cleaned with a cutter having the same shape as the cylindrical hollow portion of the tuyere, and then the same shape as the cylindrical hollow portion of the tuyere. A tuyere cleaning method for a tuyere cleaning device, wherein the tuyere is cleaned with a brush.