JPS6144075Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a fire-resistant heat insulating device applied to equipment and piping that processes low-temperature fluid.

This type of insulation material often uses foamed synthetic resin materials, which have extremely excellent performance against low temperatures, as well as excellent workability and economical insulation properties. When exposed to flames such as fire, combustion is inevitable.
It is not possible to protect the insulated construction from the danger of fire.

In order to eliminate the above-mentioned drawbacks, on the surface of the moisture-proof material applied to the outer peripheral surface of the foamed synthetic resin insulation material, foam glass, calcium silicate molded insulation material, pearlite molded insulation material, asbestos board, etc. A heat insulating device has been proposed in which a fireproof covering material such as the above is attached, and an exterior material made of a thin metal plate is applied thereon for aesthetic purposes and for the purpose of protecting the heat insulating material and the fireproof covering material.

However, in the case of a heat insulating device with the above structure, since the fireproof sheathing material, which has a heat insulating effect, is directly adhered to the surface of the moisture proof material, the dew point is within the fireproof insulation material, and the fireproof sheathing material is always in a water-containing state. . As a result, there are many fatal defects, such as a decline in the performance of the moisture-proof material, condensation on the exterior metal plate, and the accompanying formation of rust and moss, which seriously detracts from the aesthetics.

This invention eliminates the above-mentioned drawbacks, has excellent fire resistance, is easy to construct, and is economical.
The object of the present invention is to provide a fire-resistant heat insulating device suitable for equipment and piping that processes fluids in a low-temperature range.

Next, this invention will be explained in detail based on the accompanying drawings showing the embodiments thereof.

In the drawing, 1 is a workpiece such as equipment or piping that processes fluid in a low-temperature range, and 2 is a foamed synthetic resin insulation material of a fire-resistant insulation device installed on the insulation construction surface 1' of the workpiece. It is. As the foamed synthetic resin, polyisocyanate-based foamed synthetic resins such as hard urethane foam and polyisocyanurate foam, phenolic resin foam, epoxy resin foam, and polystyrene foam are used.

The heat insulating material 2 can be formed by attaching a molded material such as a foamed synthetic resin board or pipe cover to the construction surface 1' using an adhesive or binding material, or by attaching a molded material such as a foamed synthetic resin board or pipe cover to the construction surface 1' using an adhesive or binding material. A method of injecting a foaming solution of a foamable synthetic resin that can be foamed on-site into the space between 1' and a shroud placed at a required distance from it and foaming and solidifying it, or spraying the foaming solution onto the construction surface 1'. There is a method of foaming and solidifying.

A moisture-proofing material 3 is provided on the surface of the foamed synthetic resin heat insulating material 2.
is formed. Suitable moisture proofing materials include mastics, metal foils, laminates of metal foil and plastic film or kraft paper, asphalt roofing, sheet materials such as thin metal plates, and the like. Among these materials, the mastic is bonded to the outer peripheral surface of the heat insulating material 2 using means such as troweling or spraying, and the sheet material is integrally bonded to the outer peripheral surface of the heat insulating material 2 using an adhesive or the self-adhesive property of foamed synthetic resin. .

A fireproof material 6 is formed on the surface of the moisture-proof material 3 at a portion where a space 5 formed by the spacing material 4 is removed. Suitable spacing material 4 is wire mesh, expanded metal, hard asbestos sheet, honeycomb structure material made of thin metal plate, ring material, or the like.

The fireproof material 6 is made of asbestos, rock wool,
Using inorganic fibers such as ceramic fibers or glass fibers alone or in combination, using adhesives or without using adhesives to utilize the intertwining of the fibers, and blending inorganic fibers such as cement as necessary. These are made of felt, blankets, boards,
This is known as paper. Alternatively, a bulky woven fabric or knitted fabric made of the above-mentioned fiber material may be used.

The refractory material 6 used in the above structure has a density of 0.1 to
1.0 g/cm ³ and a thickness of 1 to 20 mm are suitable.
This refractory material may also be loaded between the heat insulating material 2 and the moisture proof material 3. Further, a waterproof sheet material may be interposed between the spacing material 4 and the fireproof material 6.

The outer surface of the refractory material 6 includes a stainless steel plate,
It is covered with an exterior material 7 made of a corrosion-resistant iron plate such as an aluminum plate or a resin-coated iron plate.

According to the fire-resistant heat insulating device configured as described above, the fire-resistant material 6 is provided outside the moisture-proof material 3 with a space 5 formed by the spacer 4, and the space 5 acts as a low-temperature buffer area. , the refractory material 6 can always be maintained at a temperature above the dew point.

FIGS. 3A to 3C are explanatory diagrams comparing the heat insulating device of this invention and the conventional heat insulating device with respect to the condensation phenomenon.

The case shown in FIG. 3A is a case where only a heat insulating material is used, and the heat insulating design is such that the surface temperature of the heat insulating material is equal to or higher than the dew point.

However, as shown in Figure 3B, in the case of an insulating material and a refractory material, if the temperature A of the contact surface is made above the dew point, the refractory material will not condense, but in order to do this, the insulating material must be made very thick. Or conversely, the refractory material would have to be made very thin, making it impractical.

On the other hand, as shown in Fig. 3C, according to the configuration in which a space is formed between the heat insulating material and the refractory material, since the refractory material has high heat conduction,
The temperature of the space is close to the outside temperature, so the dew point is within the insulation and no condensation occurs on the surface of the insulation. Therefore, according to the above configuration, the refractory material 6 never contains water,
Excellent fireproof insulation performance is maintained over a long period of time.

In addition, if the spacing member 4 is formed of a material such as a honeycomb structure or a ring material made of a thin metal plate, wire mesh, expanded metal, asbestos sheet, etc., the entire space is uniform and Since it is highly reinforced, there is no risk that the space will be crushed or deformed due to local stress concentration or load.

Furthermore, if the spacer is made of a heat-resistant material such as the one described above, there is no risk of the space being destroyed even in the event of an external fire.

As described above, according to this invention, a fire-resistant insulation device for equipment and piping that processes fluids in the low temperature range consists of a foamed synthetic resin insulation material positioned on the surface to be insulated, and a coating covering the outer surface of the foamed synthetic resin insulation material. The structure consists of a moisture-proof material, a fireproof material formed on the outer surface of the moisture-proof material via a spacing material, and an exterior material made of a corrosion-resistant thin metal plate covering the surface of the fireproof material. Since it can be maintained at a temperature above the above, it is possible to prevent the deterioration of the performance of the moisture-proof material caused by the refractory material being placed at the dew point, as well as the formation of rust and moss due to dew condensation on the exterior board, and to maintain the fire-resistant insulation performance for a long time. Stable maintenance can be measured.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a fireproof insulation device showing one embodiment of this invention, Fig. 2 is a sectional view of a fireproof heat insulation device showing another embodiment, and Figs. 3A and 3B are dew condensation in a conventional heat insulation device. Explanatory diagram showing the phenomenon, 3rd C
The figure is an explanatory diagram showing the dew condensation phenomenon in the heat insulating device of this invention. In the drawing, 1 is a construction body to be insulated, 2 is a heat insulating material, 3 is a moisture-proof material, 4 is a spacing material, 5 is a space, 6 is a fireproof material,
7 is an exterior material.

Claims (1)

[Scope of utility model registration request] A foamed synthetic resin insulation material, a moisture-proofing material covering the outer surface of the insulation material, a fireproofing material formed on the outside surface of the moistureproofing material via a spacing material, and an exterior material made of a corrosion-resistant thin metal plate covering the surface of the fireproofing material. A fire-resistant insulation device characterized by comprising: