JP2550278Y2 - Gas injection plug structure of electric furnace - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas injection plug structure for an electric furnace, and more particularly to a gas injection plug structure for an electric furnace improved so that the plug can be renewed very quickly.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a gas blowing plug structure of a conventional electric furnace. A backing 2 of ordinary firing magnesia brick is provided on a steel shell 1, a magnesia stamping material 4 is applied thereon, and a plug receiving brick 5 and a surrounding brick 6 are all constructed on site. It is the structure which did. 7
Is a plug.

[0003]

In the above-mentioned conventional gas-injection plug structure of an electric furnace, the construction requires a great deal of skill and is troublesome. In particular, in the case of intermediate repair (renewal), it takes time to dismantle and remove. There was a problem.

The surrounding brick 6 is a so-called dowel 6a.
Although it is attached, there is also a problem that floating may occur because the structure is not a downward pulling structure.

SUMMARY OF THE INVENTION The present invention is intended to save labor for construction, especially for intermediate renewal, and to prevent floating.

[0006]

According to the first aspect of the present invention, there is provided a gas blowing plug structure for an electric furnace, comprising: a substantially circular cover plate; a backing provided on the cover plate; And a plurality of fan-shaped cores having a truncated right conical core provided near the center of the lid plate and a plug mounting hole, and disposed around the core on the backing. A plug receiving brick, a gas blowing plug fitted and mounted in the plug mounting hole of the plug receiving brick, and the plug receiving brick disposed between the plug receiving bricks and between the plug receiving brick and the core brick. A fan-shaped brick, a large number of outer bricks surrounding the outer periphery of the aggregate of the plug receiving brick and the fan-shaped brick on the backing, a tightening ring surrounding and tightening the outer circumference of the outer brick, Electric furnace hearth brick A ramming material filled in between is made of comprises a.

A gas injection plug structure for an electric furnace according to claim 2 is the gas injection plug structure for an electric furnace according to claim 1,
The outer circumferential brick is provided with a dowel in which circumferentially adjacent outer circumferential bricks are engaged with each other.

According to a third aspect of the present invention, there is provided a gas injection plug structure for an electric furnace according to the first aspect.
A metal fitting for connecting to the lid plate is attached and connected to the lower part of the plug using a gas blowing pipe.

[0009]

According to the gas injection plug structure of the electric furnace of the first aspect , the renewal can be performed quickly and easily only by removing the stamp material around the plug. In addition, since the prefabricated assembly can be performed at the production factory, the on-site construction can be simplified .

In the gas blowing plug structure for an electric furnace according to the second aspect, since the outer peripheral bricks forming the outer peripheral ring are engaged with each other by the dowels, the outer peripheral ring is prevented from spreading outward.

According to the structure of the third aspect, floating of the plug and the brick around the plug is prevented.

[0012]

An embodiment will be described with reference to FIGS. On a substantially circular cover plate 8, a backing 9 is provided.
On the backing 9, a required number of plug bricks 11 are arranged around the core brick 10. A fan brick 12 and a close brick 13 are constructed between the core brick 10 and the plug receiving brick 11, and an outer brick 14 is arranged outside the fan brick 12 and the close brick 13. Further, the outside of the outer peripheral brick 14 is fastened with a fastening ring 15 to be integrated. The plug 16 is inserted into the inner hole 11a of the plug receiving brick 11.
And is fixed to the lid plate 8. The gap between the bottom brick 18 and the outer brick 14 of the electric furnace 17 is filled with a stamp material 19 by a conventional method.

The outer peripheral brick 14 has a substantially fan shape so as to have a ring shape by arranging a large number of bricks. The outer peripheral brick 14 has a dowel 14a on a side surface thereof, and by engaging adjacent outer bricks 14 with the dowel 14a, the ring formed of the outer peripheral brick 14 is prevented from spreading outward. .

The plug brick 11 has a fan shape, and a plurality (three in this embodiment) of the core brick 10 has a circumferential direction such that the radial direction of the fan is the radial direction of the core brick 10. It is located at the minute position. The said brick 13 is arrange | positioned between 11 plug bricks. The fan brick 12 is arranged between the plug brick 11 and the close brick 13 and the core brick 10.

The cover plate 8, the backing 9, and the core brick 1
0, a plug receiving brick 11, a fan-shaped brick 12, a closing brick 13, an outer peripheral brick 14, and a plug 16 are provided as a prefabricated assembly 30 at a production factory.

In the gas blowing plug structure of the electric furnace, the stamp material 19 around the prefabricated assembly 30 is used.
Can be updated quickly and easily by simply removing Also,
In the present embodiment, since the prefabricated assembly is used in the production factory, construction on site can be simplified. In addition, the lower lid
Since plug 1 6 is fixed to the plate 8, there is no float up.

In the above embodiment, the plug 16 is
Are provided around the area, but other numbers may be provided.

[0018]

As described above, according to the invention] According to the gas blowing plug structure for an electric furnace according to claim 1, simply by removing the ramming material surrounding the plug can be quickly and easily updated. In addition, since the prefabricated assembly can be performed at the production factory, the on-site construction can be simplified .

In the gas blowing plug structure of the electric furnace according to the second aspect, since the outer peripheral bricks forming the outer peripheral ring are engaged by the dowels, the outer peripheral ring is prevented from spreading outward.

In the gas blowing plug structure of the electric furnace according to the third aspect, the plug and the brick around the plug are prevented from floating by connecting the gas blowing plug to the cover plate.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of an electric furnace showing a gas blowing plug structure of the electric furnace according to the embodiment.

FIG. 2 is a plan view of a main part of a furnace bottom of the electric furnace according to the embodiment.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a plan view showing a gas blowing plug structure of a conventional electric furnace.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron skin 2 Backing 4 Stamp material 5 Plug brick 6 Peripheral brick 7, 16 plug 8 Cover plate 9 Backing 10 Core brick 11 Plug receiving brick 12 Fan brick 13 Closed brick 14 Peripheral brick 14a Dowel 15 Fastening ring 30 Prefabricated assembly body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) The creator Hayashi Takemoto 1861 Takaoka, Fukusaki-cho, Kanzaki-gun, Hyogo Prefecture (72) The creator Kiyoshi Kawakami 5 Hosoe, Shikima-ku, Himeji-shi, Hyogo 2-7 Sankosha's house 2-7 (72) The creator Tatsu Okamoto Okayama 117 (72) Inventor Kuniaki Miyamoto 1974-2 Honami, Bizen-shi, Okayama Prefecture (72) Inventor Eiji Yokogi 1931, Ibe, Bizen-shi, Okayama Prefecture (56) Reference Hira 2-30894 (JP, U) Jinhei 2-47436 (JP, Y2)

Claims (3)

(57) [Scope of request for utility model registration] 1. A substantially circular cover plate, a backing provided on the cover plate, a substantially cylindrical core brick provided near the center of the cover plate on the backing, and a plug. A plurality of fan-shaped plug-receiving bricks arranged around the core brick on the backing, and a gas fitted and mounted in the plug mounting hole of the plug-receiving brick; A blow plug, a fan-shaped brick disposed between the plug-receiving bricks and between the plug-receiving brick and the core brick, and an outer periphery of an assembly of the plug-receiving brick and the fan-shaped brick on the backing. An electric device comprising: a plurality of surrounding bricks; a fastening ring surrounding and fastening the periphery of the surrounding brick; and a stamp material filled between the circumferential brick and a bottom brick of an electric furnace. Furnace gas blowing Plug structure. 2. An electric furnace according to claim 1, wherein said outer brick has a dowel in which circumferentially adjacent outer bricks are engaged with each other. Gas injection plug structure. 3. The gas blowing plug structure for an electric furnace according to claim 1, wherein said gas blowing plug is connected to a cover plate.