JPS5810671B2 - Cooling device for smoked tile firing furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for forcibly cooling the inside of a tile firing furnace.

Conventionally, when smoking tiles in a smoking tile firing furnace,
In the single furnace, the tiles are first fired in the furnace, then
Once the temperature inside the furnace is set to the appropriate temperature for smoking tiles, the damper is closed to isolate the inside of the furnace from the outside air and create a sealed state, and then a fumigating agent is injected into the furnace to smoke the tiles inside the furnace. Smoke it and leave it in that state.
This is done by cooling the inside of the furnace, and in tunnel furnaces, the tiles fired in the firing zone are moved to the smoking zone that is connected to the firing zone, and the tiles are smoked. It is smoked in a sealed state in a smoking zone, then moved to a cooling zone that is connected to the smoking zone, and cooled within the zone. The purpose of sealing the tile by cutting it off from the outside air before smoking is to prevent the carbon film that forms on the outer surface of the tile from being oxidized. It depends on whether the cooling rate inside the furnace is fast or slow, and it is said that the faster the cooling rate, the better the color (silver color) will be.

For this reason, a cooling system is used in which a cooling pipe is installed along the inner wall of the furnace body, and a coolant such as water or air is passed through the cooling pipe to forcibly cool the inside of the furnace. Because heating and cooling are repeated alternately and the cooling pipe expands and contracts, it is necessary to create a structure that allows the expansion and contraction of the cooling pipe by creating a gap at the part that penetrates the furnace wall. There is a drawback that color development may be poor due to the intrusion of particles.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device for a smoky tile firing furnace that eliminates these drawbacks and reliably seals the portion of the cooling pipe that penetrates the furnace wall.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

That is, P is a furnace body, 1 is a truck, 2 is a flue, 3 is a damper, and 4 is a chimney.

Further, 5 is a cooling pipe which runs parallel to each other horizontally between both walls of the upper part of the furnace, 6 is an inlet thereof outside the furnace, and 7 is an outlet thereof.

Each of the cooling pipes 5 described above is a hollow pipe made of fire-resistant stainless steel, and from the pipe 6 outside the A furnace, cool outside air is sent through a blower (not shown).

) is forcibly fed into each cooling pipe 5, absorbs the heat inside the furnace, and is sent out of the furnace from the outlet lower.

Further, reference numerals 8 are insertion holes that are provided in both side walls of the upper part of the furnace to allow the cooling pipe 5 to pass therethrough, and the inner diameters of these insertion holes 8 are the same as those of the cooling pipe 5 It is larger than the outer diameter, and gaps 9 are layered within each insertion hole 8 .

Further, reference numeral 10 denotes a metal sole box which is fixed to the outer surface of the furnace body through which each insertion hole 8 is provided, facing the insertion hole for the time being, and inside this seal box there is a sole box. sand 11
When the box is filled, the cooling pipe 5 passes through the inside of the box.

Incidentally, the reference numeral 12 shown in the drawing represents a highly elastic glass fiber, which is in tight elastic contact around the cooling pipe 5.

Therefore, the gap 9 between the cooling pipe 5 and the insertion hole 8 is sealed by the sand 11 and glass fiber 12 filled in the seal box 10, and the outside air is prevented from flowing into the furnace. There is.

Although this actual case relates to a single furnace, it is clear that the present invention can be applied to a tunnel furnace.

As specifically explained in the above embodiment, the cooling device for the smoked tile firing furnace of the present invention cools the inside of the furnace by flowing a refrigerant into the cooling pipe that penetrates the furnace wall and is piped from outside the furnace into the inside of the furnace. In the cooling device for a smoked tile firing furnace, the cooling pipe is inserted through an insertion hole formed in the furnace wall leaving a gap, and a sole box is attached to the outer surface of the furnace wall to penetrate the cooling pipe. , the gist is that the penetrating portion of the cooling pipe is buried in sand filled in the seal box,
Because the cooling tube was inserted through the insertion hole in the furnace wall with a gap left, expansion and contraction due to thermal expansion of the cooling tube is allowed, and no deformation occurs. Since it is embedded in the sand, the gap is sealed and the inflow of outside air into the furnace is reliably prevented, and a good smoked film can be formed on the surface of the tile.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view of the smoky tile firing furnace according to the present invention;
2 is a vertical sectional view taken along the line AA in FIG. 1, and FIG. 3 is an enlarged view of the vertical sectional view taken along the line BB in FIG. 2. P... Furnace body, 1... Cart, 5...
...Cooling pipe, 10... Seal box, 11...
...Sand, 12...Glass fiber.

Claims (1)

[Scope of Claims] 1. A cooling device for a smoked tile firing furnace in which the inside of the furnace is cooled by flowing a refrigerant into a cooling pipe piped from the outside of the furnace into the inside of the furnace through the furnace wall. The cooling pipe is inserted through an insertion hole made in the wall with a gap left, and a seal box is attached to the outer surface of the furnace wall to penetrate the cooling pipe, and the cooling pipe is inserted into the sand filled in the seal box. A cooling device for a smoked tile firing furnace characterized by having a part embedded. 2. The cooling device for a smoked tile firing furnace according to claim 1, characterized in that an elastic material with excellent heat resistance, such as glass fiber, is stretched over the inner wall surface of the seal box.