JPH08285472A - Repairing material-spraying device - Google Patents

Abstract

PURPOSE: To lay a repairing material in uniform thickness around nozzle set holes of a tuyere block by a method wherein front openings of spray nozzles that radially extend from the tip of a material supply pipe are arranged along the circumference at equal intervals and a tapered-off tubular guide is arranged across the front openings of time spray nozzles. CONSTITUTION: Spray nozzles 12 of a spray nozzle unit 10 to directly spray repairing material radially branch from the end of a material supply pipe 11 that supplies thermosetting repairing material under pressure and a tapered-off tubular guide plate 13 is arranged inside front openings 12a of the spray nozzles 12. A plug 14 that is integrally formed at the central part of the front end of the tubular guide plate 13 is fitted in an outlet hole of an upper nozzle attached to a molten metal ladle so that the plug 14 integrally formed into one body with the tubular guide plate 13 arranged across the front openings 12a of the spray nozzles 12 is rotatably supported by a core metal. Thereby, the repairing material is sprayed in between the tubular guide 13 and the tuyere block and prevented from scattering to other places.

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 specifically, it is attached to a steel tap at the bottom of a tundish, a ladle, etc. (hereinafter referred to as a molten metal storage pan) in a continuous casting device. The present invention relates to a repair material spraying device that sprays a repair material around the upper nozzle mounting hole for flow rate control.

[0002]

2. Description of the Related Art Generally, a tap hole provided at the bottom of a molten metal storage pan such as a tundish or a ladle is
An upper nozzle for controlling the amount of molten metal tapped is installed, and a flow rate control device having a slide gate and a dipping nozzle is installed below the upper nozzle.

The structure of this molten metal storage pan will be described with reference to FIG.
Lined brick 104 is attached to the inside of 1,
A tuyere block 103 such as a mass brick made of refractory is provided near the tap hole 102 through which molten metal is tapped. An upper nozzle 105 is detachably attached to an attachment hole formed in the tuyere block 103 inside the molten metal storage pan 100. And again the upper nozzle 105
A flow rate control device 106 having a slide gate and a dipping nozzle for controlling the amount of molten metal tapped is installed below the.

The tuyere block 103 such as a mass brick of the molten metal storage pan 100 is made of a material having excellent heat resistance and corrosion resistance, but is melted by molten metal as the number of times of use increases. Therefore, after the molten metal in the molten metal storage pan 100 is completely poured, it is necessary to repair the melted and damaged portions. Conventionally, this repair work has been done by hand-painting a trowel, etc.
It was performed by applying a thickness of about 30 mm. However, even after all the molten metal was poured, the inside of the furnace was at a considerably high temperature, long-term work was heavy labor, and there were technical problems such as extremely high risk and low work efficiency. Therefore, in recent years, a proposal has been made and put into practical use for securing the safety of workers by mechanizing and automating using a spraying device such as a gun sprayer.

[0005]

As a conventional automated spraying device, as disclosed in, for example, Japanese Patent Laid-Open No. 53-124123, a metal-melting method that requires a repair by a single injection nozzle by a pressure-feeding method using compressed air. There is one that sprays the repair material from the closest distance on the lining brick or tuyere block of the 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 confirm the thickness of the coating layer of the repair material sprayed from the spray nozzle and the spray state. However, there is a technical problem that the coating layer of the repair material on the repair surface is not constant, and the outflow hole of the upper nozzle is blocked when the repair material is sprayed around the mounting hole of the upper nozzle.

Further, since the repair material is blown out in a fixed direction by a single injection 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 once. Moreover, there is a problem that the repair material adhering to the molten metal storage pan collides with the subsequently sprayed repair material and is scattered, so that a uniform coating layer cannot be obtained. Also, to solve this problem, the ejection speed of the repair material should be reduced, but if the ejection speed is reduced to prevent scattering of the repair material, the fine powder part in the composition that is a part of the repair material from the tip of the spray nozzle May fall off. Since this dripping is a part of the repair material, there is a technical problem that the loss of the repair material increases and the particle size composition balance of the repair material is lost, resulting in deterioration of adhesion, corrosion resistance and the like.

The present invention has been made in order to solve the above-mentioned problems of the conventional device, and the openings of a plurality of injection nozzles radially provided from the tip of the material supply pipe for feeding the repair material are circular. Around the nozzle mounting hole formed in the tuyere block by arranging the cylindrical guide plate that is formed in a tapered shape between the tip opening portions of these injection nozzles, which are arranged at equal intervals on the circumference. Another object of the present invention is to provide a repair material spraying device capable of coating the repair material with a uniform thickness.

[0008]

In order to achieve the above object, a repairing material spraying device according to the present invention is a nozzle mounting hole which is mounted on a tap hole at the bottom of a molten metal storage pan in a continuous casting device. In a repair material spraying device for spraying the repair material around the material, a material supply pipe for pumping 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 tube. A cylindrical guide plate formed in a tapered shape inside the tip opening of the injection nozzle, and fitted into an outflow hole of the nozzle attached to the center of the tip of the tubular guide plate. And a cored bar that rotatably supports the plug at one end and that is attached to the material supply pipe or the 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 the tip opening portion of the injection nozzle is provided along the outer peripheral surface of a tapered guide plate having a tapered shape. It has the structure.

[0009]

With the repair material spraying device according to the present invention having such a structure, after pouring all the molten metal in the molten metal storage pan in the casting process, the embolus is fitted into the outlet of the nozzle and the tank ( The repair material filled in the inside (not shown) 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 embolus, the repair material does not flow into the outlet of the nozzle, and since the tubular guide is provided, the repair material sprayed from the spray nozzle is provided. Is sprayed between the tubular guide and the tuyere block and does not scatter to other places. Further, since the injection nozzle is rotatably attached to the core metal in a state where the embolus is fixed, the injection nozzle can be sprayed while rotating and can be coated with the repair material having a uniform thickness. Moreover, since the plurality of injection nozzles are formed at equal intervals on the same circumference,
It is possible to obtain a coating layer having a more uniform thickness. Furthermore, since the embolus fits into the outflow hole of the nozzle, the position of the device can be regulated even when used in a situation where dust or water vapor is trapped in a high temperature environment, so the coating layer of the repair material on the repair surface is more uniform. It can be made uniform.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a side view of a main part of a repair material spraying device 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. 4 is a repair material spraying according to the present invention. It is sectional drawing which showed the state which is spraying the repair material around the upper nozzle mounting hole using an apparatus.

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

In the figure, an injection nozzle portion 10 for directly ejecting a repair material includes a material supply pipe 11 for pressure-feeding a thermosetting repair material, and four injections radially branched from the tip of the material supply pipe 11. Nozzle 12 and these injection nozzles 12
A cylindrical guide plate 13 formed in a tapered shape and disposed inside the tip end opening 12a of the cylindrical guide plate 1.
3 is integrally formed with the central portion of the tip of the injection nozzle 3 and is fitted between the plug 14 fitted into the outflow hole 2a of the upper nozzle 2 attached to the molten metal storage pan 1 and the tip opening 12a of the injection nozzle 12. It is composed of a tubular guide plate 13 provided and a core metal 15 rotatably supporting an embolus 14 integral therewith.

Here, the four injection nozzles 12 are held radially through a connecting pipe 16 installed at the tip of the material supply pipe 11 and at equal intervals on the same circumference. Reference numeral 12 also communicates with the material supply pipe 11 so that the repair material is evenly distributed to the injection nozzles 12. Further, each tip 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 formed in a tapered shape, and the injection nozzle The repair material ejected from 12 is configured to be sprayed along the outer peripheral surface of the tubular guide plate 13.

On the other hand, the core metal 15 rotatably supporting the embolus 14 integral with the cylindrical guide plate 13 is the material supply pipe 1.
1 is arranged on the same axis, and one end thereof is an embolus 1
5 is rotatably supported, and the other end is attached to a bracket 17 to a connecting pipe 16 provided at the tip of the material supply pipe 11. That is, the center of the disk-shaped support plates 13a and 14a supporting the cylindrical guide plate 13 and the embolus 14 is rotatably inserted into the tip of the core metal 15, and the disk-shaped support is supported. Plates 13a and 14a are disk-shaped stopper plates 18 to which a core metal 15 is attached.
It is retained by a and 18b. The disk-shaped stopper plates 18a and 18b may be nuts or rings. As described above, the embolus 14 is the core metal 1.
5 is rotatably attached and the core metal 15 is fixed to the connection pipe 16 via the bracket 17. Therefore, when the embolus 14 is fixed, the core metal 15, the connection pipe 16, the material supply pipe 11, and the injection nozzle. 12 can be rotated integrally.

Next, the repair work around the upper nozzle mounting hole of the molten metal storage pan, which is carried out by using the repair material spraying device thus constructed, 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 90 degrees, the repair material spraying device is moved, and the injection nozzle part 10 is placed 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 so that the plug 14 integrated with the cylindrical guide 13 is attached to the outlet 2a of the upper nozzle 2.
Then, the repair material spraying device is driven. Then, the repair material filled in the tank is pressure-fed, and the repair material is sprayed around the mounting hole of the upper nozzle 2 formed in the tuyere block 3, so that the repair material has a predetermined thickness. To cover.

Since the outlet 2a of the upper nozzle 2 is blocked 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.
Further, 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 cylindrical guide 13. It is sprayed between the tuyere blocks 3 and does not scatter to other places.

Each of the injection nozzles 12 branched from the injection nozzle portion 10 is rotatably attached to an embolus 14 that closes the outlet 2a of the upper nozzle 2. That is, the spray nozzle 12 can be rotated while spraying the repair material, and the clearance between the tuyere block 3 and the tubular guide 13 can be coated with the repair material having a uniform thickness.

As described above, according to the repair material spraying device of the present invention, a uniform coating layer can be obtained without the sprayed repair material scattering around, so that the repair material is sprayed from the tip of the injection nozzle 12. The fine powder portion in a part of the composition does not fall off and the balance of the particle size composition of the repair material is lost so that the adhesion, the corrosion resistance and the like are not deteriorated.

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

In the embodiment of the present invention, the case where four injection nozzles are formed is shown, but the invention is not limited to this. Furthermore, the core metal is the bracket 1.
Although the case where it is fixed to the connecting pipe 16 via 7 is shown, the invention is not particularly limited to this, and it may be fixed to the injection nozzle 12 via the bracket 17. Further, the spraying method can be applied to any of the dry method and the wet method, and the spraying pressure, the kind of the repair material and the like can be appropriately set.

[0022]

As described above in detail, in the repair material spraying device according to the first aspect of the present invention, the material supply pipe for feeding the repair material under pressure and the tip opening provided radially from the tip of the material supply pipe. A plurality of injection nozzles for injecting a repair material from the plurality of injection nozzles, a cylindrical guide plate formed in a tapered shape and arranged between the front end openings of the plurality of injection nozzles, and a central end of the cylindrical guide plate. Since it includes an embolus fitted to the outflow hole of the nozzle attached to the nozzle, and a rotatably supporting the embolus at one end, and the other end having a cored bar attached to the material supply pipe or the injection nozzle via a bracket. , The embolus can be fitted into the outflow hole of the nozzle, and even when used in a situation where dust and water vapor are trapped in a high temperature environment, the position of the device can be regulated and the coating layer of the repair material can be made uniform. be able to. Moreover, since the embolus is fitted in 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 rotatably formed, the repair material adhering 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 tip opening portion of the injection nozzle is formed along the outer peripheral surface of the cylindrical guide plate formed in a tapered shape, In addition to the above effects, scattering of repair material can be prevented.

As described above, according to the present invention, a uniform coating layer can be obtained without the sprayed repair material being scattered around, and a uniform coating layer can be formed from the tip of the injection nozzle to a part of the repair material. The fine powder portion does not fall off and the balance of the particle size composition of the repair material is not lost, and as a result, the adhesion and corrosion resistance are not deteriorated. Moreover, even during hot spraying in a furnace in a high temperature environment, a stable coating layer can be obtained while accurately confirming the spraying state of the repair material, so there is little loss of material and work efficiency is improved. Can be improved, and the cost can be significantly reduced.

[Brief description of 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 cross-sectional view of FIG.

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

FIG. 4 is a cross-sectional view showing a state of spraying the repair material 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 pan in a conventional continuous casting device.

[Explanation of symbols]

 1 Molten Metal Storage Pan 2 Upper Nozzle 2a Outlet 3 Tuyere Block 4 Inner Brick 10 Injection Nozzle Part 11 Material Supply Pipe 12 Injection Nozzle 13 Tubular Guide 14 Plug 15 Core Bar 16 Connection Pipe 17 Bracket

Claims (3)

[Claims] 1. A repair material spraying device for spraying repair material around a nozzle mounting hole installed in a tap hole at the bottom of a molten metal storage pan in a continuous casting apparatus, in which a material supply pipe for pumping the repair material. A plurality of injection nozzles that are provided radially from the tip of the material supply pipe and inject the repair material from the tip openings; and a tapered taper disposed between the tip openings of the plurality of injection nozzles. -Shaped tubular guide plate, an embolus that fits into the outflow hole of the nozzle attached to the center of the tip of the tubular guide plate, and the embolus rotatably supported at one end and the other end Includes a core metal attached to the material supply pipe or the injection nozzle via a bracket. 2. The repair material spraying device according to claim 1, wherein the tip end openings of the injection nozzles are formed at equal intervals on the same circumference. 3. The tip opening portion of the injection nozzle is formed along an outer peripheral surface of a cylindrical guide plate formed in a tapered shape.
The repair material spraying device described in.