JPH0322713Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a heat insulating structure having a structure in which a ceramic fiber laminate and a support supporting it are connected using a spiral metal wire.

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. There are various products made of ceramic fiber, but mainly sheet-like products such as blankets and felt are used as insulation materials for industrial furnaces.

When blankets or felt are used as furnace wall insulation, they are usually pierced through heat-resistant metal pins pre-attached to the furnace casing to an appropriate thickness, and then fixed with washers and nuts. This method is commonly referred to as layer lining.

However, in recent years, block lining has been increasingly used to accommodate high-temperature furnaces and shorten construction time.

Unlike layer lining, block lining is a block-shaped insulation material made by cutting blankets into appropriate sizes and stacking them in advance, and then attaching them to the furnace casing using an appropriate attachment method so that the stacked surface is perpendicular to the casing. It has the feature that the furnace wall can be constructed in a short time.

Regarding such a heat insulating structure, the prior art includes heat insulating structures shown in FIGS. 3 to 5.

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

In the heat insulating structure shown in FIG. 4, support rods 5 inserted into each strip-shaped blanket 6 of the ceramic fiber laminate 2 are supported by support metal fittings 4 attached to the support 1 in advance.

The heat insulation structure shown in FIG.
The strip-shaped blankets 6 are stacked and pierced into a mold bottle 1a.

Problems to be Solved by the Invention The conventional heat insulation structure has the following problems.

The heat insulating structure shown in FIG. 3 has a simple structure, is easy to manufacture, and is inexpensive. On the other hand, since the ceramic fiber laminate 2 is supported on the support 1 only by the adhesive 3, it is easy to peel off at the adhesive surface between the adhesive 3 and the ceramic fiber laminate 2, causing problems in reliability during use. be.

Regarding the heat insulating structure shown in FIG. 4, it is difficult to drill long holes at accurate positions in the easily deformable ceramic fiber laminate 2. Furthermore, when the support metal fitting 4 is inserted into the ceramic fiber laminate 2, it is difficult to connect the support rod 5 with the support metal fitting 4 because it is not visible from the outside, so it is necessary to strongly support it mechanically. Although the reliability during use is satisfactory, it has drawbacks such as being difficult and expensive to manufacture.

The heat insulating structure shown in FIG. 5 has a simpler structure than the one shown in FIG. 4 and has satisfactory reliability during use, but like the structure shown in FIG. 4, it is difficult and expensive to manufacture.

Purpose of the invention The purpose of this invention is to compensate for these drawbacks of the prior art, and to provide an inexpensive and reliable product by using a spiral metal wire as a means to connect the ceramic fiber laminate and its support. The object of the present invention is to provide a heat insulating structure with mechanical bonding.

Summary of the invention Therefore, in order to achieve this objective, this invention is based on the heat insulating structure described in claim 1 of the utility model registration.

Means for Solving the Problems A spiral metal wire 8 is screwed into the ceramic fiber laminate 2 in which a plurality of strip-shaped blankets 6 are laminated to connect the ceramic fiber laminate 2 and the support 1. The direction in which the helical metal wire 8 is screwed in is substantially perpendicular to the cut end of the strip-shaped blanket 6 constituting the ceramic fiber laminate 2. Further, the spiral metal wire 8 is screwed into the strip-shaped blanket 6 to a predetermined depth, so that the ceramic fiber laminate 2 is supported by the spiral metal wire 8.

Function Utilizing the light and soft properties of the ceramic fiber laminate 2, the ceramic fiber laminate 2 can be connected to the support 1.

Embodiments This invention will be explained in detail using illustrated embodiments.

In FIG. 1, a helical metal wire 8 is screwed into a ceramic fiber laminate 2. In FIG. One end of this spiral metal wire 8 is firmly fixed to the support 1 by suitable means such as welding.

The material of the spiral metal wire 8 is preferably iron or an iron alloy, but is not particularly limited as long as it has sufficient strength to securely fix the ceramic fiber laminate 2 to the support 1. Various spiral diameters can be used, from as small as 10 mm to approximately 150 mm.
A diameter of 50 mm is particularly suitable, and the support 1 and the ceramic fiber laminate 2 can be firmly fixed.

The wire diameter of the spiral metal wire 8 should be determined based on the relationship between the diameter of the spiral and the strength of the wire. Generally, if the diameter of the spiral is small, it may be thin, but if the diameter of the spiral is large, it may be thin. It has to be thick.

For example, if the diameter of the spiral is 10 mm, the wire diameter is 1
mm may be used, but if the diameter of the spiral is 150 mm, the wire diameter is 8 mm.

The ceramic fiber laminate 2 is made by laminating strip-shaped blankets 6, and may be made by bonding the layers between each layer with a suitable adhesive or made into one piece by using thread or a band without using adhesive. It can be anything.

Regarding the directionality of the ceramic fiber laminate 2, the ceramic fiber laminate 2 and the support 1
It is preferable that the cut ends of the plurality of strip-shaped blankets 6 constituting the ceramic fiber laminate 2 are placed on the joint surface 7 of the ceramic fiber laminate 2.

That is, the spiral metal wire 8 is screwed into the strip-shaped blanket 6 in a direction perpendicular to the cut end thereof. In this case, the spiral metal wire 8 has a
The ceramic fiber laminate 2 can be more strongly held on the support 1.

FIG. 2 shows another example. In the embodiment shown in FIG. 1, the spiral metal wire 8 is screwed in a direction perpendicular to the joint surface 7. That is, the spiral metal wire 8 is screwed in a direction perpendicular to the cut of the strip-shaped blanket 6 which is joined to the support 1 at the joint surface 7. In FIG. 2, the spiral metal wire 8
is screwed in a direction parallel to the joint surface 7.

A portion of the spiral metal wire 8 is screwed through the support 1, and is firmly fixed to the support 1 at the penetrating portion by a suitable means such as welding.

In this case, the part protruding from the support 1 may be cut off if necessary. Furthermore, even if a portion of the spiral metal wire 8 is screwed into contact with the support 1 without penetrating the support 1, the contact point can be firmly fixed to the support 1 using means such as welding. You may.

Effects of the invention As explained above, the heat insulating structure of this invention has
By making good use of the properties of the soft ceramic fiber laminate, the ceramic fiber laminate and the support are connected using a spiral metal wire that can be easily screwed into the ceramic fiber laminate, and the spiral metal wire is a strip-shaped blanket. Since the screw is screwed substantially perpendicular to the cut, the structure is simple, and a high mechanical connection can be obtained at low cost.

Further, since the spiral metal wire is screwed into the strip-shaped blanket to a predetermined depth, it can be placed away from the high temperature portion of the spiral metal wire. Therefore, even if the heat insulating structure is kept at a high temperature for a long time, damage caused by the metal wire will not occur.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the heat insulating structure of this invention, FIG. 2 is a side view showing another example, and FIGS. 3 to 5 are side views showing a conventional heat insulating structure. DESCRIPTION OF SYMBOLS 1... Support body, 2... Ceramic fiber laminate, 8... Spiral metal wire, 6... Strip-shaped blanket.

Claims (1)

[Scope of utility model registration request] A ceramic fiber laminate composed of a plurality of strip-shaped blankets and a support are connected by a spiral metal wire screwed into the ceramic fiber laminate, and the spiral metal wire is connected to the cut end of the strip-shaped blanket. 1. A heat insulating structure characterized in that the spiral metal wire supports a ceramic fiber laminate by being screwed into the strip blanket in a direction substantially perpendicular to the blanket strip to a predetermined depth.