JPH07120169A - Firing apparatus for large-sized earthenware - Google Patents

Abstract

PURPOSE:To uniformly heat a product without causing any damage by providing a rough surface having regular corrugation in the upper surface of a lowermost shelf plate among shelf plates in a firing chamber, permitting fuel gas to flow through the corrugation of the rough surface, and directly placing the product on the rough surface. CONSTITUTION:A heat insulating member 18 and a refractory brick layer 19 are doubly placed on a truck 15 outside an oven body 1, and support bricks 21 placing interstices 20 laterally thereof are arranged on the upper refractory brick layer 19, and a lowermost shelf plate 22 having a rough surface 23 formed on the upper surface thereof is horizontally placed, and further a raw product 23 is directly placed on the lowermost shelf plate 22. A burner 8 is fired, and burned gas burned in a burner combustion chamber 6 goes around a ceiling and lowers, and further passes through between the rough surface 28 at the lowermost shelf plate 22 to fire the raw product 23. The combustion gas further passes through between pieces after a second stage shelf plate 25 or heats the shelf plate from the lower surface side of the shelf plate to fire the raw product 23. Hereby, the raw product 23 is uniformly heated without any discoloration or deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a firing device for large porcelain.

[0002]

2. Description of the Related Art Conventionally, a furnace body having a firing chamber formed therein, and a carriage formed of an iron plate underframe that can freely move in and out of the furnace body,
Support bricks arranged side by side on the trolley, a lowermost shelf placed horizontally on the upper surface of the supporting brick, and a horizontal placement on the lowermost shelf via several columns. Of the above-mentioned second step shelf, similarly superposed third step shelf board or more shelf boards, and a large pottery such as a toilet bowl, a pottery bath, or a water tank placed on each shelf board through a piece. A large-scale pottery firing device comprising a product is known.

[0003]

The known large-scale pottery firing apparatus has a problem that the pottery which is partially discolored is baked. When a large pottery product is placed and fired through the piece, the temperature of the base of the piece and the glaze cannot be balanced, and the glaze on the surface is cracked, and a part of the product is punctured. was there. This is because degassing cannot be performed sufficiently. This phenomenon is seen only in the large-scale pottery placed on the bottom shelf, and the large-scale pottery placed on the second shelf can be placed on the same piece or directly. There is no partial discoloration and no dimensional deformation.

[0004]

Therefore, according to the present invention, there is provided a furnace body 1 having a firing chamber 2 formed therein, a bogie 15 formed by an iron plate underframe 16 which can freely move into and out of the furnace body 1, Dolly 1
5, the support bricks 21 arranged side by side with a gap 20 therebetween, and the lowermost shelf plate 22 horizontally placed on the upper surface of the support bricks 21.
A second stage shelf plate 25 placed horizontally on the lowermost shelf plate 22 through a few columns 24, a third stage shelf plate 26 similarly stacked, or more shelf plates; A large pottery raw product 23 placed on each of the shelves, and the regular wave 2 is formed on the upper surface of the lowermost shelf 22 of the shelves.
9 or the small protrusions 30 are formed to form the rough surface 28, and the raw product 23 is directly placed on the rough surface so that the combustion gas flows between the waves 29 or the small projections 30. It is used as a firing device for large pottery. Further, according to the present invention, in the above, the burner 8 for heating the inside is provided on the side wall of the furnace body 1, and the combustion chamber 6 having the upper opening is formed inside the burner 8 so that the flame descends around the ceiling. It is used as a firing device for large-scale pottery.

[0005]

An embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 is a furnace body made of bricks, in which a firing chamber 2 is formed. An intermediate shelf 4 protruding laterally inward is formed at a position slightly lower than the upper and lower intermediate positions of the inner wall 3 of the furnace body 1, and an upper standing wall 5 vertically standing upward from the tip of the intermediate shelf 4 is formed. The burner combustion chamber 6 is formed between the standing wall 5 and the furnace body 1. The upper portion of the burner combustion chamber 6 opens into the firing chamber 2.

A cylindrical burner tile 7 which communicates with the inside and outside is formed on the side wall of the furnace body 1, and a burner 8 for ejecting flame from the outside of the burner tile 7 is inserted into the burner combustion chamber 6. The lower end of the inner wall 3 of the furnace body 1 is provided with a protruding portion 9 that protrudes inward similarly to the intermediate shelf 4, and a lower standing wall 10 is formed upward from the tip of the protruding portion 9. A gap 11 is formed between the upper end of the lower standing wall 10 and the lower surface of the intermediate shelf 4, and a flue 12 is formed between the inner surface of the standing wall 10 and the furnace body 1.

The furnace body 1, the intermediate shelf 4, the upper standing wall 5, the projecting portion 9 and the lower standing wall 10 are all made of brick material. At the lower end of the projecting portion 9, an L-shaped steel 13 made of steel material is formed. After mounting, the L-shaped steel 13 is filled with sand 14. A rail is laid on the floor between the left and right L-shaped steels 13, 13.
Reference numeral 15 is a bogie that rolls on a rail, and a wheel is attached to a lower portion of an underframe 16 formed of an iron plate. The width of the underframe 16 is such that it reaches the left and right standing walls 10,
From both left and right ends, a hanging piece 17 buried in the sand 14 of the L-shaped steel 13 is provided to shut off the flue 12 from the outside air. A heat insulating member 18 made of a brick material is placed on the underframe 16, and a refractory brick layer 19 is superposed on the heat insulating member 18,
Support bricks 21 are juxtaposed on the refractory brick layer 19 with a gap 20 therebetween.

On the upper surface of the supporting brick 21, a lowermost shelf plate 22 of a refractory brick made of silicon carbide, silicon nitride, mullite or alumina is placed horizontally, and a toilet bowl is placed on the lowermost shelf 22. A large pottery raw product 23 such as a large tableware, a bath tub, or an aquarium is directly placed, several pillars 24 are placed, a second shelf 25 is placed thereon, and the pottery raw product 23 is placed in the same manner. Further, the third stage shelf plate 26 or more shelf plates are placed, but the raw product 23 placed on the second stage shelf plate 25 or more shelf plate is placed with the piece 27 placed. But,
The raw product 23 placed on the lowermost shelf 22 is directly placed as described above, and the rough surface 28 is formed on the upper surface of the lowermost shelf 22. In addition, the raw product 2 is placed on the second shelf 25 or more.
You can place 3 directly.

That is, the lowermost shelf 22 is the other second shelf 2
Different from 5 or more shelves, with regular waves 29 on the top side
Or a small projection 30 is formed to form a wave 29,
The combustion gas is allowed to flow between the small protrusions 30.
The shelf boards of the step shelf boards 25 and above are not roughened, and are as usual. It should be noted that, if cost is not taken into consideration, the second and higher shelf plates may be the same as the lowermost shelf plate.

[0010]

[Operation] Next, the operation will be described. When the shelves are made of silicon carbide, silicon nitride, mullite or alumina, in addition to the conventionally known double-sided smooth shelves, FIG. 2 or FIGS.
As shown in FIG. 3, a shelf board having a regular surface 29 or a rough surface 28 having innumerable small protrusions 30 is manufactured.

The heat insulating member 18 and the refractory brick layer 19 are doubly placed on the carriage 15 outside the furnace body 1, and the support bricks 21 are arranged on the refractory brick layer 19 on the upper side with a gap 20 between them.
The lowermost shelf 22 having the rough surface 28 formed thereon is horizontally placed on the support brick 21, and the raw product 23 is directly placed on the lowermost shelf 22.

Then, the raw product 2 is placed on the lowermost shelf 22.
A plurality of columns 24 having a height higher than 3 are arranged, a second stage shelf plate 25 having a well-known smooth surface is placed on the column 24, and the second stage shelf plate 2
The raw product 23 is placed on the piece 5 with or without the piece 27. In the same manner, the desired number of shelves and the raw product 23 are polymerized, the carriage 15 is pushed into the firing chamber 2, and the burner 8 is ignited.
The combustion gas burned inside goes down around the ceiling, and the raw product 23 is burned by passing between the rough surfaces 28 on the lowermost shelf 22.
In the case of the second-stage shelf plate 25 or higher, the raw product 23 is baked by heating the shelf plate through the space between the pieces 27 or from the lower surface side of the shelf plate.

With such firing, burnt spots do not occur in the second shelf 25 and above, regardless of the presence or absence of the piece 27, and the combustion gas is rough on the lowermost shelf 22. Since the raw product 23 is heated and baked through the space between 28, the raw product 23 can be baked without spots, and even with a large-sized pottery raw product 23 such as a toilet bowl, a large tableware, a bath tub, or an aquarium,
Can be fired without discoloration.

That is, in the case of the second shelf plate 25 or more, since the combustion gas of the burner 8 reaches the lower surface of the shelf plate, the shelf plate is heated sufficiently regardless of the presence of the piece 27 and the shelf plate is not unevenly formed. Although the product 23 can be fired, the combustion gas of the burner 8 does not reach the lower surface of the lowermost shelf plate 22 sufficiently, and therefore, if the piece 27 is used, heating is not sufficient, and degassing cannot be completed completely, which is considered to cause discoloration. .

[0015]

In the known large-scale pottery firing apparatus, there were those in which the pottery was partially discolored, the glaze on the surface was cracked, or the product was partially punctured. When a large pottery product is placed and fired through the piece, the temperature of the base of the piece and the glaze cannot be balanced, and the glaze on the surface is cracked, and a part of the product is punctured. was there. This is because degassing cannot be performed sufficiently. This phenomenon is seen only in the large-scale pottery placed on the bottom shelf, and the large-scale pottery placed on the second shelf can be placed on the same piece or directly. There is no partial discoloration and no dimensional deformation.
However, according to the present invention, the furnace body 1 having the firing chamber 2 formed therein is provided.
A trolley 15 formed by an iron plate underframe 16 that can freely move in and out of the furnace body 1, a support brick 21 installed side by side with a gap 20 on the trolley 15, and a horizontal surface on the upper surface of the support brick 21. The lowermost shelf 22 placed and the second shelf 25 placed horizontally on the lowermost shelf 22 through several columns 24.
And a shelf plate of the third step shelves 26 or more similarly superposed and a large-sized pottery raw product 23 placed on each of the shelves, wherein the lowermost shelf plate among the shelf plates 22
On the upper surface of the corrugated surface 29, regular waves 29 are formed or small projections 30 are formed to form a rough surface 28 so that the combustion gas flows between the corrugated surfaces 29 or the small projections 30.
Since the raw product 23 is directly placed on the baking device for a large-scale pottery, the lowermost shelf 22 to which the combustion gas does not reach sufficiently has a regular wave 29 or a rough surface 28 on which small protrusions 30 are formed. Since the raw product 23 is directly placed on the rough surface 28, the combustion gas flows between the waves 29 or the small protrusions 30, so that the raw product 23 is uniformly heated without being discolored or deformed. . Further, according to the present invention, in the above, the burner 8 for heating the inside is provided on the side wall of the furnace body 1, and the combustion chamber 6 having the upper opening is formed inside the burner 8 so that the flame descends around the ceiling. Since it is used as a firing device for a large-scale pottery, the firing can be performed evenly in combination with the configuration of the first aspect.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view.

FIG. 2 is a vertical cross-sectional view of the lowermost shelf and raw products.

FIG. 3 is a vertical cross-sectional view of a second-stage shelf plate and above and a raw product.

FIG. 4 is a plan view of a rough surface of a corrugated plate.

FIG. 5 is a plan view of a second embodiment of the rough surface of the corrugated plate.

FIG. 6 is a side view of a rough surface of a corrugated plate.

FIG. 7 is a perspective view of a rough surface of small protrusions.

[Explanation of symbols]

1 ... Furnace body, 2 ... Baking chamber, 3 ... Inner wall, 4 ... Shelf, 5 ... Upper standing wall, 6 ... Burner combustion chamber, 7 ... Burner tile, 8 ... Burner, 9 ... Projection part, 10 ... Lower standing wall, 11 ... Gap, 1
2 ... Flue, 13 ... L-shaped steel, 14 ... Sand, 15 ... Bogie, 16
... Underframe, 17 ... Hanging piece, 18 ... Insulation member, 19 ... Fireproof brick layer, 20 ... Gap, 21 ... Support brick, 22 ... Bottom shelf board, 23 ... Product, 24 ... Strut, 25 ... Second stage Shelf board,
26 ... 3rd step shelf board, 27 ... Piece, 28 ... Rough surface, 29 ...
Waves, 30 ... Small protrusions.

Claims (2)

[Claims] 1. A furnace body (1) having a firing chamber (2) formed therein, a carriage (15) formed by an iron plate underframe (16) which can freely move in and out of the furnace body (1), and a lateral space (20) on the carriage (15). Support bricks 21 installed side by side, the lowermost shelf plate 22 horizontally placed on the upper surface of the supporting bricks 21, and horizontally placed on the lowermost shelf plate 22 through several columns 24 Step shelf plate 25,
Similarly, the third-stage shelves 26 or more superposed shelves and the large-sized pottery raw product 23 placed on each of the shelves, in which the lowermost shelves 22 among the shelves are On the upper surface, regular waves 29 are formed or small projections 30 are formed to form a rough surface 28 so that combustion gas flows between the waves 29 or small projections 30.
A large-scale pottery baking device on which the raw product 23 is directly placed. 2. The burner 8 according to claim 1, wherein a burner 8 for heating the inside is provided on a side wall of the furnace body 1, a burner combustion chamber 6 having an upper opening is formed inside the burner 8, and the flame descends around a ceiling. A large-scale pottery firing device designed to do so.