JPH0438959B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a heat insulating structure having a structure in which a ceramic fiber laminate and a support for supporting the same are connected using a support fitting provided with a large number of tooth-like protrusions. It is something.

Conventional Technology Ceramic fiber has been widely used as a heat insulating material for industrial furnaces due to its light weight, high heat resistance, and low thermal conductivity.

Products made from ceramic fiber are
Although there are various types, sheet-like products such as blankets and felt are mainly used as insulation materials for industrial furnaces.

When blankets or felt are used as furnace wall insulation, they are usually stacked on heat-resistant metal pins pre-attached to the furnace casing until the appropriate thickness is reached, and then secured with washers or nuts. This method is commonly referred to as a layer lining method.

However, in recent years, the block lining method has been increasingly adopted in order to accommodate high-temperature furnaces and shorten construction time. The block lining method differs from the layer lining method in that the furnace wall is constructed in a short time by attaching block-shaped insulation materials made by cutting blankets to appropriate sizes and laminating them to the furnace casing using appropriate attachment means. It has the characteristics of being able to

Such a heat insulating structure is known as a heat insulating structure as shown in FIGS. 9 to 11.

The heat insulating structure shown in FIG. 9 is constructed by bonding a ceramic fiber laminate 2 and a support 1 attached to a furnace casing with an adhesive 3.

In the heat insulating structure shown in FIG. 10, a support rod 5 inserted into a ceramic fiber laminate 2 is supported by a support fitting 4 attached to a support 1 in advance.

The heat insulating structure shown in FIG. 11 is made by stacking and piercing a rectangular blanket 6 onto an L-shaped pin 1a attached to a support 1 to form a ceramic fiber laminate 2.
was formed.

Problems to be Solved by the Invention Such conventional heat insulating structures have the following problems.

While the heat insulating structure shown in FIG. 9 has a simple structure, is easy to manufacture, and is inexpensive, the ceramic fiber laminate 2 is supported on the support 1 only by the adhesive 3, so The adhesive surface between the adhesive 3 and the ceramic fiber laminate 2 is likely to peel off, which poses a problem in reliability during use.

In the heat insulating structure shown in FIG. 10, it is difficult to drill long holes at precise locations in the easily deformable ceramic fiber laminate 2. Furthermore, in this heat insulating structure, when the support metal fitting 4 is inserted into the ceramic fiber laminate 2, it is difficult to connect the support rod 5 to the support metal fitting 4 because it is not visible from the outside. For these reasons, although it can provide strong mechanical support and is reliable in use, it has problems such as being difficult and expensive to manufacture and install.

The heat insulating structure shown in Fig. 11 has a simpler structure than the one shown in Fig. 10, and is reliable in use, but it is difficult and expensive to manufacture like the heat insulating structure shown in Fig. 10. .

Furthermore, a common drawback in the cases of FIGS. 10 and 11 is that the support rod 5 and the L-shaped pin 1a must be inserted over the entire length of the ceramic fiber laminate 2 in the stacking direction. Otherwise, all of the strip-shaped blankets 6 constituting the ceramic fiber laminate 2 are not supported.

If this condition is not met, there is a risk that the unsupported strip-shaped blanket 6 will fall off during use. Similarly, the support rod 5 and the L-shaped pin 1a tend to bend under their own weight during use, and as a result, the heat insulating structure tends to deform. Especially when used on the ceiling, a gap may be formed on the inside surface of the ceramic fiber laminate 2.
High-temperature flames from inside the furnace can penetrate into the interior, reducing the insulation effect, or in extreme cases, the heat can cause the insulation structure itself to deteriorate from the inside, causing it to fall off. To avoid this, use the support rod 5 and the L-shaped pin 1.
A has the disadvantage that it needs to be as thick as possible and is expensive.

The purpose of the present invention is to compensate for these drawbacks of the prior art, and to provide a means for bonding a ceramic fiber laminate and its support by attaching a support metal fitting to the end surface of a strip-shaped blanket constituting the ceramic fiber laminate. To provide a novel heat insulating structure in which a part is pierced and a supporting metal fitting is fixed to a support body so that it cannot be freely attached or detached or can be freely attached and detached.

Means for Solving the Problems Therefore, in order to achieve this object, the present invention provides a structure in which a plurality of strip-shaped blankets each comprising a ceramic fiber laminate, in which a large number of tooth-like protrusions provided on a supporting metal fitting, are arranged in a ceramic fiber laminate. The gist of the present invention is a heat insulating structure characterized in that the supporting metal fittings are pierced into the butt end surface and are provided on a support body that supports a ceramic fiber laminate.

Next, the present invention will be explained in detail with reference to Examples.

Embodiment 1 FIG. 1 shows an example of the present invention in which a support body attached to a furnace casing and a support fitting cannot be detached from each other.

The ceramic fiber laminate 35 is made by cutting out strip-shaped brackets 16, each measuring 300 mm in length and width, from a large blanket with a thickness of, for example, 25 mm.
In the illustrated example, 14 sheets are stacked, compressed and bound with thread so that each side is 300 mm.

Each strip-shaped bracket 16 constituting this ceramic fiber laminate 35 has a butt end surface 30 formed by the end thereof, for example, 300×300 mm. A large number of tooth-like protrusions 9 of the support metal fitting 8 are pierced into this end surface 30. Then, a support body 7 made of an iron plate or punched metal is placed on the support metal fitting 8, and the joint part 12 is joined and fixed by electric welding or eyelets. Of course, an adhesive may also be used to fix the support body 7 and the ceramic fiber laminate 35, and the attachment to the furnace casing may be done by a conventionally known method.

The support body 7 and the support metal fitting 8 may be made separately and then joined at the joint part 12, or the support body 7 and the support metal fitting 8 may be joined at the joint part 12 and then punched out as one piece. Later, the tooth-like protrusion 9 is bent at right angles along the line corresponding to the joining part 12.
It can also be made by piercing the ceramic fiber laminate 35.

In FIG. 2, the support fitting 8 has a side portion 13
In the illustrated example, it consists of 14 tooth-like protrusions 9 each having a height of, for example, 40 mm. The angle α made by these two parts
is 90 degrees. An angle α of 90 degrees is most effective for supporting the ceramic fiber laminate 35, and is preferably in the range of 45 degrees or more to 135 degrees.

The longer the length of the tooth-like protrusion 9, the greater the effect of holding the ceramic fiber, but if it is too long, it will easily bend, so it is preferable that the tooth-like protrusion 9 be shorter than half the length of the side of the ceramic fiber laminate 35 in the insertion direction. , or even more.

It is desirable that the number of tooth-like protrusions 9 be greater than the number of strip-shaped blankets 16 constituting the ceramic fiber laminate 35, and that at least one tooth-like protrusion 9 is inserted into each strip-shaped blanket 16. , but is not necessarily limited.

FIG. 3 shows another example of a support fitting 11, in which a plurality of rows of tooth-like protrusions 10 are integrally punched out from a single metal plate. The tooth-like protrusions 10 of this support metal fitting 11 are also set at an angle α similarly to the support metal fitting 8.

Embodiment 2 Embodiment 2 is an example in which a support body attached to a furnace casing and a support fitting are fixed by a simple attachment/detachment mechanism.

In FIGS. 4 and 5, the groove 15 of the support 14 is
Along this line, the protrusion 17a of the support fitting 17 can fit inside. The ceramic fiber laminate 35 is, for example, a 25 mm strip-shaped blanket 1.
Stack 14 sheets of 6, compress and bind with thread to make one side 300.
It is expressed in mm.

The end of the strip-shaped blanket 16 that makes up this ceramic fiber laminate 35 produces 300
Fourteen tooth-like protrusions 18 of the support metal fitting 17 are pierced into the butt end surface 30 of ×300 mm. Then, stack the support body 14 so as to cover it from above, and
The protrusion 17a of No. 7 is fitted into the groove 15 of the support body 14 and fixed integrally.

Embodiment 3 Embodiment 3 is an example having a different attachment/detachment mechanism from Embodiment 2. In FIGS. 6 and 7, the protrusion 22 provided on the support fitting 20 is a protrusion with a return shape, and the support body 19 is provided with a window-shaped opening 23 so that the protrusion 22 fits snugly into it. .

The materials are selected so that the support body 19 and the support fittings 20 have appropriate flexibility. For example, if it is made from a 1.5 mm thick iron plate, it is possible to create a structure in which the protrusion 22 and the opening 23 fit together with human effort, and will not come apart naturally.

The tooth-like protrusion 21 of the support fitting 20 is inserted into the butt end surface 30 formed by the end of the strip-shaped blanket 16 constituting the ceramic fiber laminate 35, and the support member 19 is placed on top of the end surface 30 and pushed, thereby facilitating support. The body 19 and the support fitting 20 are now in a fixed state.

Embodiment 4 This is an example in which a support 33 attached to a furnace casing is fixed by a simple attachment/detachment mechanism so as to cover the support fitting 32, and the side surface of the support 33 can be opened and closed at will.

In FIG. 8, the support 33 is connected to the ceiling portion 24.
and side parts 27, and at least one of the two side parts 27 is joined with a hinge 40 at a joining part 25 to the ceiling part 24. Then, the angle θ formed by the two becomes 0 due to the force of a spring (not shown).
more than 180 degrees, preferably more than 80 degrees and less than 180 degrees
It is kept at any angle below.

The side portion 27 joined by the hinge 40 can be easily opened at any angle from 0 degrees to θ by an external force, and returns to the original angle θ when the external force is released.

At this time, if any angle is smaller than angle θ,
The side portion 27 expands outward, and if this is used as a heat insulator for a furnace, a gap will be created between adjacent heat insulators. The optimum angle θ is 90 degrees; if it is larger than this angle, the support fitting 32 should be
There is an inconvenience that you have to open the side part 27 by hand when pushing it into position 3, but there is no difference in functionality.

A hole 26 is formed in the side portion 27, and the size of the hole 26 is such that a projection 28 provided on a support fitting 28 is snugly fitted therein. Furthermore, the tip portion 31 of the side portion 27 and the tip portion 38 of the support metal fitting 32 are bent outward and inward, for example, by about 20 degrees, and by doing so, the support body 33 and the support metal fitting 32 are fixed. The operation becomes even easier.

A large number of protrusions 29 of the support fitting 28 are stuck into the end surface of the strip-shaped blanket.

Effects of the Invention As is clear from the above explanation, the present invention has the following remarkable effects.

(1) Each strip-shaped blanket that makes up the ceramic fiber laminate is supported by a large number of tooth-like protrusions, so the support is reliable.
There is no need to worry about them falling off during use.

(2) Since the tooth-like projections are pierced into the end surface of the strip-shaped blanket to support the strip-shaped blanket,
Even relatively short teeth can be effectively supported.

(3) Furthermore, since the length of the tooth-like protrusions can be shortened, there is less risk of bending under its own weight even in hot conditions, and the material cost is low, and it can be used safely on ceilings, etc.

(4) Another advantage of short teeth is that they are easy to pierce, making it easy to pierce the ceramic fiber laminate at a precise location.

(5) Furthermore, if the support and support metal fittings can be freely attached and detached, it is possible to separate the support body and support metal fittings in advance and attach them to the furnace casing while visually checking the support body. It is possible to eliminate inefficient and incomplete installation work, such as having to grope for the installation work because it is obstructed by the ceramic fiber laminate that is integrated with the ceramic fiber laminate.

(6) Precise and efficient construction can be achieved by attaching the ceramic fiber laminate with the support fittings pierced to the support after attaching the support by an appropriate means.

(7) Similarly, in the case of repairs, the support fittings that are integrated with the ceramic fiber laminate can be easily separated from the support from inside the furnace, so necessary repairs can be minimized and done quickly. It can be carried out.

[Brief explanation of drawings]

1 is a schematic perspective view showing Embodiment 1 of the present invention, FIG. 2 is a perspective view showing the support fitting shown in FIG. 1, FIG. 3 is a perspective view showing another example of the support fitting, and FIG. 4 5 is a front view showing Embodiment 2 of this invention, and FIG.
6 is a front view showing Embodiment 3 of the present invention, FIG. 7 is a side view of Embodiment 3 shown in FIG. 6, and FIG. 8 is a side view of Embodiment 3 of the present invention. An exploded perspective view showing the fourth embodiment, and FIGS. 9 to 11 are side views showing the conventional example. 8, 17, 20, 32...Supporting metal fittings, 9, 1
0, 18, 21, 29... Tooth-like projection, 35... Ceramic fiber laminate, 16... Strip-shaped blanket, 7, 14, 19, 33... Support.

Claims (1)

[Scope of Claims] 1. A large number of tooth-like protrusions provided on the support fitting are pierced into the end faces of a plurality of strip-shaped blankets constituting the ceramic fiber laminate, and the support fitting supports the ceramic fiber laminate. A heat insulating structure characterized by being provided on a body. 2. The heat insulating structure according to claim 1, wherein the support fitting and the support body are fixed by a detachable mechanism. 3. The heat insulating structure according to claim 2, wherein the support overlaps to cover the support fitting. 4. The heat insulating structure according to claim 3, wherein the ceiling part and the side part of the support body are connected by a hinge, and the angle is maintained at an arbitrary angle between 0 degrees and 180 degrees by the force of a spring. 5. A heat insulating structure according to claim 1, in which the support body and the support metal fittings are integrally constructed.