JP2953987B2 - Repair material spraying 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 repair material spraying device, and more particularly, to a tread, ladle or the like (hereinafter, referred to as a molten metal storage pot) in a continuous casting device, which is mounted on a tapping hole at the bottom. The present invention relates to a repair material spraying device for spraying a repair material around a flow control upper nozzle mounting hole.

[0002]

2. Description of the Related Art Generally, a tapping hole provided at the bottom of a molten metal storage pan such as a tundish or ladle is provided with:
An upper nozzle for controlling the amount of tapping of the molten metal is mounted, and a flow controller having a slide gate and an immersion nozzle is installed below the upper nozzle.

The structure of the molten metal storage pot will be described with reference to FIG.
The inside brick 104 is stuck inside 1
A tuyere block 103 made of a refractory, such as a mass brick, is provided in the vicinity of the tap hole 102 from which molten metal taps. An upper nozzle 105 is removably mounted in a mounting hole formed in the tuyere block 103 inside the molten metal storage pot 100. And again the upper nozzle 105
A flow control device 106 having a slide gate and an immersion nozzle for controlling the amount of tapping of the molten metal is provided below.

[0004] The tuyere block 103 such as a mass brick of the molten metal storage pot 100 is made of a material having excellent heat and corrosion resistance. However, as the frequency of use increases, the tuyere block 103 is eroded by the molten metal. Therefore, after pouring all the molten metal in the molten metal storage pot 100, it is necessary to repair these melted portions. Conventionally, this repair work is performed by so-called ironing by hand, and repair materials consisting of refractories are
It has been performed by applying to a thickness of about 30 mm. However, even after all the molten metal has been poured, there are technical problems such as the inside of the furnace being at a considerably high temperature, long hours of work being heavy labor, extremely high risk and low work efficiency. For this reason, in recent years, proposals have been made to secure the safety of workers by mechanization and automation using a spraying device such as a gun blower and the like, which has been put into practical use.

[0005]

As a conventional automated spraying apparatus, for example, as shown in Japanese Patent Application Laid-Open No. 53-124123, a metal melting which requires repair by a single injection nozzle by a compressed air feeding method. There is a type that sprays a repair material from a close distance to a lining brick or a tuyere block of a container. Since this conventional device is used in a situation where dust and water vapor are trapped in a high-temperature environment, it is difficult to accurately check the thickness of the coating layer of the repair material sprayed from the spray nozzle and the spray state. In addition, there is a technical problem that not only the coating layer of the repair material on the repair surface is not constant, but also the outflow hole of the upper nozzle is closed when the repair material is sprayed around the mounting hole of the upper nozzle.

Further, since the repair material is blown out only in a certain direction by a single spray nozzle, there is a technical problem that the spray area of the repair material is small and it cannot be sprayed over a wide area at a time. In addition, there is a problem that the repair material adhered to the molten metal storage pan scatters by colliding with the subsequently blown repair material, and a uniform coating layer cannot be obtained. In order to solve this problem, the jetting speed of the repair material may be reduced, but if the jetting speed is reduced to prevent the repair material from scattering, the fine powder in the composition that is a part of the repair material from the spray nozzle tip May fall off. Since this dripping is a part of the repair material, there is a technical problem that the repair material is increased in loss and the balance of the particle size composition of the repair material is lost, thereby lowering the adhesion and the corrosion resistance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional apparatus, and has a plurality of injection nozzles provided radially from the tip of a material supply pipe for feeding a repair material. Around the nozzle mounting holes formed in the tuyere block by arranging at equal intervals on the circumference and arranging a tapered cylindrical guide plate between the tip openings of these injection nozzles. It is an object of the present invention to provide a repair material spraying device which can cover the repair material with a uniform thickness.

[0008]

In order to achieve the above object, a repair material spraying apparatus according to the present invention comprises a nozzle mounting hole mounted at a tapping hole at the bottom of a molten metal storage pan in a continuous casting apparatus. A material supply pipe for pressure-feeding the repair material, and a plurality of injection nozzles for injecting the repair material from a tip opening radially provided from the tip of the material supply pipe. A tapered cylindrical guide plate provided inside the tip opening of the injection nozzle, and fitted to an outflow hole of a nozzle attached to the center of the tip of the tubular guide plate. The basic configuration includes an embolus to be formed, and a rotatably supporting the embolus at one end and a core bar attached to a material supply pipe or an injection nozzle via a bracket at the other end. Preferably, the plurality of injection nozzles are formed at equal intervals on the same circumference, and a tip opening of the injection nozzle is provided along an outer peripheral surface of a tapered cylindrical guide plate formed in a tapered shape. Configuration.

[0009]

The repairing material spraying apparatus according to the present invention having the above-described construction, after pouring all the molten metal in the molten metal storage pan in the casting process, inserts the plug into the outlet of the nozzle and inserts the tank into the tank ( (Not shown), the repair material is pumped, the repair material is sprayed around the nozzle mounting hole formed in the tuyere block, and the repair material is coated to a preset thickness. . At this time, since the outlet of the nozzle is blocked by the plug, the repair material does not flow into the outlet of the nozzle, and since the tubular guide is provided, the repair material injected from the injection nozzle is provided. Is sprayed between the tubular guide and the tuyere block, and does not scatter to other places. In addition, since the injection nozzle is rotatably mounted on the metal core in a state where the embolus is fixed, the injection nozzle can be sprayed while rotating, and the repair material having a uniform thickness can be coated. Moreover, since the plurality of injection nozzles are formed at equal intervals on the same circumference,
A coating layer having a more uniform thickness can be obtained. Furthermore, since the embolic plug fits into the outlet of the nozzle, the position of the device can be regulated even when used in situations where dust and water vapor are trapped in a high-temperature environment. And uniformity.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view of a main part of a repair material spraying apparatus according to the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is an upper half sectional view of FIG. 1, and FIG. It is sectional drawing which showed the state which sprays a repair material around the upper nozzle attachment hole using an apparatus.

In the present invention, a tank filled with a repair material in a repair material spraying device, an air pump for feeding the repair material in the tank by compressed air, a water supply pump for feeding water, and the like are generally used. Since the structure of the automatic spraying device can be used as it is, the structure of the injection nozzle portion for directly injecting the repair material to the repair surface will be described below.

In FIG. 1, an injection nozzle portion 10 for directly injecting a repair material has a material supply pipe 11 for pressure-feeding a thermosetting repair material and the like, and four injection branches radially branched from the tip of the material supply pipe 11. Nozzle 12 and these injection nozzles 12
Tapered cylindrical guide plate 13 disposed inside the distal end opening 12a of the cylindrical guide plate 1;
3 is formed integrally with the central portion of the distal end of the injection nozzle 12 and is fitted between the plug 14 fitted into the outflow hole 2 a of the upper nozzle 2 attached to the molten metal storage pan 1 and the distal end opening 12 a of the injection nozzle 12. It is constituted by a provided cylindrical guide plate 13 and a core metal 15 rotatably supporting an integral plug 14.

Here, the four injection nozzles 12 are held radially and at equal intervals on the same circumference via a connecting pipe 16 installed at the tip of the material supply pipe 11. 12 also communicates with the material supply pipe 11 so that the repair material is evenly distributed to each injection nozzle 12. Each opening 12a of the injection nozzle 12 radially branched from the material supply pipe 11 is curved inward along the outer peripheral surface of the cylindrical guide plate 13 which is formed into a tapered shape. The repair material spouted from 12 is configured to be sprayed along the outer peripheral surface of the cylindrical guide plate 13.

On the other hand, a metal core 15 that rotatably supports the plug 14 integrated with the cylindrical guide plate 13 is a material supply pipe 1.
1 is arranged on the same axis as that of the embolus 1
5 is rotatably supported, and the other end is attached to a bracket 17 on a connection pipe 16 provided at the tip of the material supply pipe 11. That is, the tip of the cored bar 15 is rotatably inserted into the center of the disc-shaped support plates 13a and 14a that support the cylindrical guide plate 13 and the plug 14. The plates 13a and 14a are a disk-shaped stopper plate 18 with a cored bar 15 mounted thereon.
a, 18b prevent it from coming off. The disc-shaped stopper plates 18a, 18b may be nuts or rings. As described above, the embolus 14 is
5, the core metal 15 is fixed to the connection pipe 16 via the bracket 17, so when the plug 14 is fixed, the core metal 15, the connection pipe 16, the material supply pipe 11, the injection nozzle 12 can be integrally rotated.

Next, the repair work around the upper nozzle mounting hole of the molten metal storage pot performed by using the repair material spraying apparatus thus configured will be described with reference to FIG. First,
After pouring all the molten metal in the molten metal storage pan 1 in the casting process, the molten metal storage pan 1 is tilted by 90 degrees, the repair material spraying device is moved, and the injection nozzle unit 10 is moved inside the molten metal storage pan 1. It is set near the tuyere block 3 to which the upper nozzle 2 is attached.

Next, the injection nozzle portion 10 is extended, and the plug 14 integrated with the cylindrical guide 13 is inserted into the outlet 2 a of the upper nozzle 2.
Then, the repair material spraying device is driven. Then, the repairing material filled in the tank is fed under pressure, the repairing material is jetted around the mounting hole of the upper nozzle 2 formed in the tuyere block 3, and the repairing material is set to a preset thickness. Cover.

Since the outlet 2a of the upper nozzle 2 is closed by the plug 14, the repair material does not flow into the outlet 2a of the upper nozzle 2 and does not block the outlet 2a.
In addition, since the cylindrical guide 13 extending in a tapered shape behind the embolus 14 is provided, the repair material injected from the four injection nozzles 12 branched from the injection nozzle unit 10 is the same as the cylindrical guide 13. It is sprayed between the tuyere block 3 and does not fly to other places.

Each of the injection nozzles 12 branched from the injection nozzle section 10 is rotatably mounted on an embolus 14 closing the outlet 2a of the upper nozzle 2. That is, the spray nozzle 12 can be rotated while the repair material is being sprayed, and the gap between the tuyere block 3 and the cylindrical guide 13 can be covered with the repair material having a uniform thickness.

As described above, according to the repair material spraying apparatus of the present invention, a uniform coating layer can be obtained without the sprayed repair material being scattered around, so that the repair material can be sprayed from the tip of the injection nozzle 12. The fine powder portion in the composition, which is a part, does not drop and loses the particle size composition balance of the repair material, and does not cause a decrease in adhesion, corrosion resistance, and the like.

Further, even in a hot spraying operation in a furnace under a high temperature environment, the plug 14 is connected to the outlet 2 of the upper nozzle 2.
By fitting into a, the position of the device can be regulated and a stable coating layer can be obtained, so that loss of material is small, work efficiency is improved, and significant cost reduction can be achieved.

In the embodiment of the present invention, four injection nozzles are formed. However, the present invention is not limited to this. Furthermore, the core metal is the bracket 1
Although the case where the connection pipe 16 is fixed to the connection pipe 16 is shown, the invention is not particularly limited to this. The connection pipe 16 may be fixed to the injection nozzle 12 via the bracket 17. The spraying method can be applied to any of a dry method and a wet method, and the spraying pressure, the type of the repair material, and the like can be appropriately set.

[0022]

As described above in detail, the repair material spraying device according to the first aspect of the present invention has a material supply pipe for pressure-feeding the repair material, and a tip opening provided radially from the tip of the material supply pipe. A plurality of injection nozzles for injecting a repair material from the above, a tapered cylindrical guide plate disposed between the distal end openings of the multiple injection nozzles, and a central portion of the distal end of the cylindrical guide plate A plug fitted to the outflow hole of the nozzle attached to the nozzle, and a rotatably supporting the plug at one end and a core attached to the material supply pipe or the injection nozzle via a bracket at the other end. The embolus can be fitted into the outlet of the nozzle, and the position of the device can be regulated even when used in a situation where dust and water vapor are trapped in a high temperature environment, and the coating layer of the repair material is made uniform. be able to. In addition, since the plug is fitted into the outflow hole of the nozzle, the outflow hole of the nozzle is not blocked by the sprayed repair material. Further, since the injection nozzle is formed rotatably, the repair material attached to the molten metal storage pan does not scatter due to collision with the subsequently sprayed repair material, and a more uniform coating layer can be obtained.

According to the repair material spraying device of the second aspect, the plurality of injection nozzles are formed at equal intervals on the same circumference. It can be sprayed so as to obtain a uniform coating layer. Further, according to the repair material spraying device described in claim 3, since the opening at the tip of the injection nozzle is formed along the outer peripheral surface of the cylindrical guide plate formed into a tapered shape, In addition to the above effects, it is possible to prevent the repair material from scattering.

As described above, according to the present invention, a uniform coating layer can be obtained without the sprayed repair material being scattered to the surroundings. Neither does the fine powder drop and the balance of the particle size composition of the repair material is lost, and as a result, the adhesion, corrosion resistance, and the like do not decrease. In addition, even in the case of hot spraying in a furnace in a high-temperature environment, a stable coating layer can be obtained while accurately checking the spraying condition of the repair material. And cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing a repair material spraying device around an upper nozzle mounting hole according to the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is an upper half sectional view of FIG. 1;

FIG. 4 is a sectional view showing a state in which the repair material is sprayed around the upper nozzle mounting hole using the repair material spraying device according to the present invention.

FIG. 5 is a cross-sectional view showing a structure of an upper nozzle mounting portion of a molten metal storage pot in a conventional continuous casting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molten metal storage pot 2 Upper nozzle 2a Outflow port 3 Tuyere block 4 Lining brick 10 Injection nozzle part 11 Material supply pipe 12 Injection nozzle 13 Tubular guide 14 Embolus 15 Core metal 16 Connection pipe 17 Bracket

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kenichi Tsujimoto 1 Minamito, Ogakie-cho, Kariya-shi, Aichi Prefecture Toshiba Ceramics Co., Ltd. Kariya Works (56) References JP-A-7-260369 (JP, A) JP-A-3 -13790 (JP, a) JP flat 2-110289 (JP, a) JitsuHiraku Akira 56-110858JP, U) JitsuHiraku Akira 55-10939 (JP, U) (58 ) investigated the field (Int.Cl. ⁶ , DB name) F27D 1/16 B22D 11/10 310 B22D 41/02

Claims (3)

(57) [Claims] 1. A material supply pipe for feeding a repair material in a repair material spraying device for spraying a repair material around a nozzle mounting hole mounted on a tapping hole at a bottom of a molten metal storage pan in a continuous casting apparatus. And a plurality of spray nozzles provided radially from the tip of the material supply pipe, for spraying the repair material from the tip opening, and a tapered taper disposed between the tip openings of the plurality of spray nozzles. A cylindrical guide plate formed in a shape, an obturator fitted into an outflow hole of a nozzle attached to the center of the distal end of the tubular guide plate, and an end that rotatably supports the obturator at one end and the other end And a core metal attached to the material supply pipe or the injection nozzle via a bracket. 2. The repair material spraying apparatus according to claim 1, wherein the opening portions of the injection nozzles are formed at equal intervals on the same circumference. 3. The injection nozzle according to claim 1, wherein an opening at a tip end of the injection nozzle is formed along an outer peripheral surface of a tapered tubular guide plate.
The repair material spraying device according to item 1.