JPS588764Y2 - Soaking furnace lid - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a soaking furnace lid, and aims to provide a furnace lid that is easy to repair, has no heat leakage, and has a long life.

Conventionally, the lid of a soaking furnace is lined with refractory material, and the structure is such that the refractory is prevented from falling off using anchor tiles, but the heat of the burner flame of the soaking furnace and the crane that opens and closes the lid The refractory lining is likely to fall off in a short period of time due to impact during movement, and the surrounding areas are particularly likely to fall off, resulting in frequent repairs.

As the lid body is repeatedly dismantled and reinstalled each time the surrounding area is repaired, the refractory lining in the central area other than the surrounding areas becomes loose, resulting in a repeating vicious cycle that shortens the lifespan.

In addition, because the surrounding area and the center area were lined with monolithic refractories of the same quality with no edge cuts, there was a major problem of fire leakage occurring at the interface between the newly constructed monolithic refractories and the old refractories. there were.

This invention solves these problems,
The main feature is that the central part of the furnace lid is lined with a main refractory, the main refractory is surrounded by surrounding refractories, and each refractory has an approximately vertical contact surface with uneven horizontal stripes. It is located where it is connected.

The present invention will be explained below based on the illustrated embodiments.

In FIGS. 1 to 5, 30 is a furnace lid.

Reference numeral 1 denotes a furnace lid 7 frame that surrounds the furnace lid 30, and cross beams 3 are provided at appropriate positions to also serve as reinforcement.

The lower edge 14 protrudes into the sand seal 12 fixed to the lower edge of the frame 1 of the furnace lid 7 and housed in the curved tile 13 at the upper edge of the furnace wall 20, so that the inside 31 of the soaking furnace and the outside A seal plate 2 having a T-shaped cross section is fixed to the lower edge of the furnace lid claim 1.

The lower edge 14 has a knife-like cross-sectional shape that gradually becomes thinner downwardly, so that it can easily enter the sand seal 12.

Reference numeral 11 denotes a V-shaped stud, which projects from the inner surface of the seal plate 2 in a staggered manner, and is made of stainless steel or the like.

The central part of the furnace lid 30 is lined with a main refractory 10 such as a plastic refractory, and the main refractory 10 is suspended from the cross beam 3 by U-bolts 4 or the like by anchor tiles 6. Efforts are made to prevent it from falling downward.

Reference numeral 5 denotes an anchor tile hanging fixture, which is interposed between the U bolt 4 and the anchor tile 6.

As can be seen in FIGS. 1 and 2, the anchor tile 6 has a rectangular cross section and has trapezoidal concave grooves γ arranged in appropriate numbers.

8 is a convex portion.

Therefore, the surrounding refractory 1 surrounds the main refractory 10.
As shown in FIGS. 4 and 5, both refractories 10 and 15 are connected by a substantially vertical contact surface 23 having uneven horizontal striations 22.

The material of the surrounding refractory 15 is different from that of the main body refractory 10, and is made of a material with excellent fire resistance such as castable refractory.

In other words, the two refractories 10.15 are made of different materials and are connected so that the trapezoidal uneven horizontal strips 22 are combined with each other. The vertical contact surface 23 is so-called edge-cut.

Further, as is clear from FIGS. 1, 2, and 4, the outer circumferential surface of the surrounding refractory 15 is in contact with the inner circumferential surface of the furnace lid frame 1, and the lower surface of the refractory 15 has a tapered surface. 18 and is also in contact with the inner circumferential surface of the seal plate 2. The stud 11 is embedded in this refractory 15 and has a tapered surface 18.
At the outer periphery, from the part where the blade-like thin taper part of the lower edge part 14 of the seal grating 2 remains, it tapers upward as it goes inward to the furnace lid 30, and continues to the lower surface of the main body refractory 10. The upper surfaces of both refractories 10 and 15 are made into the same plane, and a heat insulating layer 9 is provided.

This heat insulating layer 9 is made of heat insulating mortar or the like.

Further, as is clear from FIG. 2, anchor tiles 6 are arranged along the contact surface 23 at predetermined intervals.

This is to prevent the refractory material 10.15 of each car from falling off.
The present invention also relates to a method of constructing the contact surface 23 having the uneven horizontal stripes 22.

That is, after fixing the anchor tile 6 as shown in FIGS. 1 and 2, a rod-shaped jig 21 with a trapezoidal cross section is placed on the anchor tile at a position corresponding to the contact surface 23, as shown in FIG. After fitting into the concave annular groove γ of No. 6 and arranging it as shown in FIG. Refractory 15
It pours into it.

Next, after this surrounding refractory 15 is solidified, the rod-shaped jig 2
1 and the temporary frame, and then install the main refractory 10.

Note that 19 indicates the plate connection part.

As described above, since the stud 11 is provided protrudingly on the seal plate 2, and the tapered surface 1B is provided toward the middle of the furnace lid 30 while leaving an appropriate dimension on the lower edge 14, the seal plate 2
is protected by the refractory 15, and the adhesion of the refractory 15 itself to the seal plate 2 is enhanced, so the life of the furnace cover is significantly extended.

It is difficult to judge the lifespan of the furnace lid 30, but if the seal plate 2 attached to the four circumferences of the furnace lid 30 turns red even slightly as a criterion, the lifespan is considered as [Before improvement] [After improvement] 6 to 8 months → 18 to 24 months, an approximately three-fold increase in lifespan.

As explained in detail above, the present invention has a main body refractory 10 in the central part.
is lined with a surrounding refractory 15 surrounding the main refractory 10, and both refractories 10 and 15 are connected by a substantially vertical contact surface 23 having uneven horizontal stripes 22, so that the furnace lid 30 is damaged by high temperatures and vibrations, only the surrounding refractories 15 can be dismantled using castable refractories, etc., which greatly simplifies repair, and there is no damage to the main refractories due to vibrations during repair and disassembly. We were able to cut repair costs in half.

Furthermore, it was possible to prevent fire leakage from the contact surface between the newly repaired refractory 15 and the old refractory main body refractory 10, and the airtightness around the furnace lid 30 was improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view showing one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 4 is an enlarged view of the main part of FIG. 1, FIG. 5 is a re-enlarged view, and FIG. 6 is a sectional view and a front view of the rod-shaped jig. 10...Main refractory, 15...Surrounding refractory, 22...Irregular horizontal stripes, 23...Contact surface, 30... Hearth lid.

Claims (1)

[Scope of utility model registration request] A main body refractory 10 is lined in the central part, and a peripheral refractory 15 whose lower surface has a tapered surface 18 is lined to surround the main body refractory 10, and both refractories 10.15 have uneven horizontal stripes 22. A soaking furnace lid characterized in that it is connected by a substantially vertical contact surface 23.