JPH0650190Y2 - Gas impermeable fiber block - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gas impermeable fiber block used as a heat insulating material for various industrial furnaces.

2. Description of the Related Art Inorganic fiber blocks made of heat-resistant fibers such as ceramic fibers are lightweight, have excellent heat retention, and have a small amount of heat storage, so they are used as heat insulating materials for various industrial furnaces.

As such an inorganic fiber block, a plurality of strip-shaped ceramic fiber blankets or felts that are laminated and integrated with a thread or an adhesive, or a substrate such as a punching metal for attaching a furnace wall to one surface of the inorganic fiber block is used. It is known that it is attached.

Problems to be Solved by the Invention However, conventional inorganic fiber blocks are fibrous. Therefore, it is gas permeable and cannot sufficiently prevent the phenomenon that the gas body passes through the inside of the block. The passage of such a gas body causes a leakage of the atmosphere in the furnace and a consequent loss of thermal energy.

OBJECT OF THE INVENTION The present invention aims to solve the above-mentioned drawbacks of conventional inorganic fiber blocks and to provide a fiber block which is particularly gas impermeable and easy to handle.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a gas-impermeable fiber block according to claim 1.

Means for Solving the Problems The gas impermeable fiber block according to the present invention is a substantially rectangular parallelepiped inorganic fiber block used as a heat insulating material to construct an adiabatic furnace wall by a large number of fiber blocks.
Airtightness in which a metal foil is adhered to one or both sides of a glass fiber cloth to the entire predetermined surface arranged on the low temperature side and at least a part or all of the four surfaces adjacent to the predetermined surface. A gas impermeable fiber block characterized in that it is covered with a cloth, but the surface arranged on the hot side of the block is not covered with an airtight cloth.

The airtight cloth is preferably fixed to the inorganic fiber block by one or more fixing means selected from adhesives, adhesives, strings, threads and tacks.

The inorganic fiber block is composed of inorganic fibers. As the inorganic fibers, it is desirable to use ceramic fibers, rock wool, glass fibers, quartz fibers, crystallized fibers and the like.

As a method of closely attaching (laminating) the metal foil to the glass fiber cloth, there are a method of vapor-depositing or spraying a metal, a method of directly attaching the metal foil, a method of coating the cloth with a paint containing metal powder, and the like. As the metal, it is desirable to use aluminum, stainless steel, or titanium that is not easily oxidized in the air.

Action The gas impermeable fiber block 1, 11, 21, 31 of the present invention is such that the surface covered with the airtight cloth 3, 13, 23, 33 is perpendicular to the direction of heat flow and hot gas flow, In addition, it is positioned outside the furnace or arranged so as to form an outer surface. Therefore, it is possible to prevent the gas body from flowing through the surface covered with the airtight cloth.

The gas-impermeable fiber block 1, 11, 21, 31 of the present invention is used as an outer heat insulating material such as the wall of the upper structure of a glass melting furnace that has a lot of radiant heat and many joints, or has a large positive and negative fluctuation in the furnace pressure. It is particularly suitable for an accompanying device, for example, an outer heat insulating material such as a wall of various heat storage chambers, has an excellent heat insulating effect, and is useful for energy saving.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a gas impermeable fiber block 1 according to the present invention, and FIG. 2 is an exploded view thereof. The gas-impermeable fiber block 1 is composed of a laminated body 4 in which a large number of strip-shaped inorganic fiber blankets 2 are laminated, and an airtight cloth 3.

The strip-shaped inorganic fiber block 2 is obtained by cutting a blanket or felt made of inorganic fibers into strips. A plurality of the strip-shaped inorganic fiber blankets 2 are laminated to form a block-shaped laminated body 4, and the layers are bonded together with various adhesives or integrated by using a thread or a string.

For example, a 100 × 300 mm strip-shaped inorganic fiber blanket 2 made from a 25 mm thick ceramic fiber blanket
Stacking 16 sheets while compressing them 100 × 300 × 300mm 4
And Nylon threads are threaded in the stacking direction of the stack 4 to bind them together.

Separately, a bulk fiber made of inorganic fibers and a binder are molded into a block shape.

As the inorganic fibers, rock wool, glass fibers, quartz fibers, crystallized fibers and the like may be used in addition to ceramic fibers.

The airtight cloth 3 is a cloth made of glass fiber as a base cloth, and a metal foil is evenly adhered to one surface or both surfaces of the base cloth and laminated. The metal foil is laminated on the base cloth by attaching a thin metal foil to the base cloth or by vapor-depositing or spraying a metal.

As still another method, the airtight cloth 3 may be formed by coating the base cloth with a paint containing metal powder.

As the metal used here, a metal which is not easily oxidized in air is selected. For example, aluminum, stainless steel, titanium, etc. may be mentioned. Among these metals, aluminum is a particularly preferable metal from the viewpoints of being highly flexible, inexpensive, and easily available.

Such a glass fiber cloth 3 with a metal foil has a function of blocking the permeation of a gas body in addition to the characteristics that it is flexible, tough and hard to stain.

The airtight cloth 3 substantially completely covers a predetermined surface (low temperature surface) 5 arranged on the low temperature side of the inorganic fiber block laminate 4. Further, the airtight cloth 3 covers a part of at least two or more of the four side surfaces adjacent to the cold surface 5. The portion covering the side surface may extend to the high temperature surface 6 of the inorganic fiber block, but normally it extends to about half the side surface of the inorganic fiber block.

The airtight cloth 3 is fixed to the inorganic fiber block by one or more fixing means selected from various adhesives, adhesives, strings, threads, and tacks. The number of side surfaces covered by the airtight cloth may be two, three, or four.

As the area of the airtight cloth 3 arranged on the side surface of the laminated body 4 is larger, the airtight cloth 3 is less likely to be peeled off, and the gas body passing through the block can be reliably prevented. However, the airtight cloth 3 is generally expensive, and from the economical point of view, it is usually desirable that the number of side surfaces to be covered is two. And this 2
It is desirable that one has two faces facing each other. Further, it is desirable that these two surfaces are surfaces formed by blanket or felt cuts. In this case, the airtight cloth becomes more difficult to peel off. Similarly, the low temperature surface 5 of the inorganic fiber block is almost completely covered by the airtight cloth 3.
It is desirable that the airtight cloth 3 is a surface formed by a cut edge of a blanket or felt from the viewpoint that the airtight cloth 3 is hard to peel off, and that covering from this direction has a stronger effect of holding the inorganic fiber blocks together.

A specific example in which the inorganic fiber block laminate 4 is covered and fixed with the airtight cloth 3 will be described. A glass fiber cloth with aluminum foil is used as the airtight cloth 3.

The glass fiber cloth with an aluminum foil of 400 × 300 mm is adhered to the ceramic fiber block of 100 × 300 × 300 mm described above with the surface of the aluminum foil facing outward using an adhesive. The bonding surface is a 300 × 300 mm surface and the two side surfaces in contact with this surface, both of which are the surfaces made by the cut end of the ceramic fiber blanket. A glass fiber cloth with aluminum foil covers a 300 x 300 mm surface, and a part of the glass fiber cloth is bonded to the side surface so as to extend evenly by 50 mm.

Gas impermeable inorganic fiber block 1 made in this way
Is durable and can be used as it is, but it is made of flammable thread such as cotton or nylon so that it penetrates the strip-shaped inorganic fiber block 2 over the airtight cloth 3 on the two sides, or steel or glass fiber. Tying through a non-combustible thread makes it even stronger. Further, hitting a metal tack on the airtight cloth is also used as one of the fixing means.

3 to 5 are perspective views showing another embodiment of the present invention.

FIG. 3 shows a surface perpendicular to the stacking direction of the inorganic fiber blanket 2 or the inorganic fiber block laminate 14 in which felt is laminated as a low temperature surface (predetermined surface) 15 to be arranged on the low temperature side, and this surface 15 and this surface are adjacent to this surface 15. This is an example in which a part of the two side surfaces to be covered is covered with a glass fiber cloth 13 with airtight metal foil and adhered with an adhesive.

FIG. 4 shows an example in which the remaining two side surfaces of the embodiment shown in FIG. 1 are also partially covered with a glass fiber cloth 33 with a metal foil. However, about half of each side is covered with an airtight cloth.

FIG. 5 is an example in which the airtight cloth of FIG. 4 is extended so as to cover the entire side surface area.

Effect of the Invention When the temperature of the furnace is kept warm, the gas impermeable fiber blocks of the present invention are arranged side by side in close contact with each other to obtain a greater effect. Layers can be formed. Moreover, since the airtight cloth has a small size and is firmly fixed to each individual block, it has a high resistance to the gas in the furnace trying to blow out from the joint of the furnace, and it is not blown up or turned up. .

For this reason, it is possible to efficiently shut off the heat radiated from the furnace and the leaked gas from the joint. On the contrary, when the pressure inside the furnace is negative, the outside air entering the furnace can be efficiently blocked.

Further, the gas-impermeable fiber block of the present invention has advantages that it is lightweight and tough, and therefore it is easy to handle, and dust is unlikely to adhere to the surface, which is also aesthetically pleasing. Therefore, the gas-impermeable fiber block of the present invention is suitable as a heat insulating material for a glass melting furnace or a heat storage chamber.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a gas impermeable fiber block according to the present invention, FIG. 2 is an exploded view thereof, FIG. 3 is an exploded view showing another embodiment, and FIGS. It is a perspective view showing an example of. 1,11,21,31… Gas impermeable fiber block 2… Strip-shaped inorganic fiber blanket 3, 13, 23, 33… Airtight cloth

Claims (1)

[Scope of utility model registration request] 1. In a substantially rectangular parallelepiped inorganic fiber block used as a heat insulating material for constructing a heat insulating furnace wall by a large number of fiber blocks, an entire predetermined surface arranged on the low temperature side and a portion adjacent to the predetermined surface. At least 2 out of 2
A part or all of the two surfaces is covered with an airtight cloth in which a metal foil is adhered to one or both surfaces of a glass fiber cloth, but the surface arranged on the high temperature side of the block is not covered with the airtight cloth. Gas impermeable fiber block.