JPS6057094A - Metal coating heat-insulating structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a metal-coated thermal structure. In particular, J! ,? , relates to a heat-retaining structure formed by bringing them into contact with each other. This type of equipment is used in facilities related to nuclear reactor cooling systems, and is used to supply and supply air to air conditioning equipment.
In order to ensure that the controlled atmosphere is properly maintained, a connection configuration is used that reduces heat blow-off.

[Background of the invention]

At the establishment of facilities related to reactor cooling systems such as those mentioned above, inspections are legally required during the period of service. For this reason, it is necessary that the pulse vortices installed on equipment and piping be made of heat-retaining and iJ construction that can be easily removed. Therefore, in general,
11 Rizo units? Adjacent to it, a thermal insulation structure is adopted to prevent sweating. FIG. 1 shows this type of metal-covered heat-insulating structure based on the original technology. As shown in the figure, the piping 1 is surrounded by a crystal structure 2. This metal-coated heat-insulating structure 2
In this case, the internal heat insulating material 3 is wrapped with the metal interior plate 4 on the piping side,
It has a structure in which the outside is covered with a metal exterior plate 5, and the side is wrapped with a flat metal end face plate 6. A connection seal plate 7 is attached to the outer surface of the metal exterior plate 5. In the space between the piping 1 and the metal interior plate 4, a preheater 8 is attached to the metal interior plate 4, passing through the metal-coated heat insulation structure 2.

However, since this conventional structure has a flat connection surface, there is a large difference between the elongation due to thermal expansion of the metal interior plate 4 and the elongation due to thermal expansion of the metal exterior plate 5, resulting in a gap between the connections during operation. It had the disadvantage that it became larger and caused more heat to be blown out.

Figure 2 shows the prior art of music. This relay is different from the one shown in FIG. 1 in that a notch is provided in the metal end plate 9 and a heat insulating material 10 is filled in the space on the connecting surface.

However, even in this structure, since the heat insulating material 10 is not an elastic body, it does not recover when compression or tension is applied, and the heat insulating material 10
This has the disadvantage that a gap is created between the metal end plate 9 and the metal end plate 9, and a large amount of heat is blown out.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal-coated heat-retaining structure that can eliminate the drawbacks of the prior art described above and reduce the amount of heat blown out from the heat-retaining structure connections.

[Summary of the invention]

In the present invention, due to the large temperature difference between the inside and outside of the insulation, the elongation of the interior board during operation becomes larger than the expansion of the exterior board, and therefore the insulation board is deformed and the insulation is damaged. In order to reduce the occurrence of this gap, we created a gap to absorb the elongation of the inner panel side, so that the close contact area between the instant contact structures always maintains its tight sealing property. This is configured to achieve the above objective. If you line it up, the 1! 1 liter joint will keep you warm;,? By applying compressive force to the living body etc. from the outside of the structure, deformation of the thermal packing can be effectively prevented.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIG.

In FIG. 3, the same or identical components as in FIGS. 1 and 112 are indicated using the same reference numerals.

The heat retaining structure 2 according to this embodiment is made up of adjacent structural units 1.1 each of which is constructed by covering a heat insulating material with a metal plate. A close contact portion 1a in which the end face of M is in close contact with an adjacent structural unit.

la and the absorbing portion Ib adjacent to each other with a gap ■.

lb, so that the difference in elongation due to expansion of the covering metal is absorbed by the absorbing portions 1b, Ilb, and the contact portions 1a, la are always in close contact with adjacent units.

This example will be explained in more detail below. In this example, the contact portions (a, la) are always brought into close contact with adjacent units due to the metal elastic body 12. That is, the metal-coated heat-retaining structure 2
An elastic body 11 is attached to the outer surface of the metal exterior plate 5, and an inverted V-shaped metal elastic body 12 is attached on the elastic body 11. The shape of the metal end plate 13 is stepped, and the surfaces of the adjacent metal end plate 13 and the two-sided tab contact portions Ia, la are in close contact with the subsequent surfaces extending in the left-right direction in the figure, and
The surface has a gap III. The preheater 8 that penetrates the metal-coated heat-insulating structure 2 is bent in a step-like manner in the heat-insulating material 3 similarly to the metal end face plate 13, and is attached to the metal interior plate 4 through the heat-insulating material 3.

Next, the operation of this embodiment will be explained. At the same time as the pipe 1 is heated to a high temperature, the metal interior plate 4 is also heated to approximately the same temperature. However, the temperature difference between the metal exterior plate 5 and the metal interior plate 4 becomes large due to the heat insulating effect of the heat insulating material 3. For this reason, the metal interior plate 4 heated to a high temperature expands due to thermal expansion, but the metal end plate 1
It is absorbed into the gap (2) provided at the joint of No. 3, and is in close contact with the other during operation. Further, the metal elastic body 12 having an inverted square shape provided on the outer surface of the metal exterior plate 5 can uniformly adhere to the metal exterior plate 5 due to the elastic body 11. In order to apply compressive force to the close contact portion 1a and Ua (overlapping portion), the close contact portion Ia + na is always
(Ichinebe) will be in close contact. Further, the expansion caused by the heat generated by the preheater 8 itself is absorbed by the heat insulating material 3 and does not move by the metal exterior plate 5.

According to this embodiment, since the joints are always in close contact with each other during operation, it is possible to prevent heat from blowing out from the joints, which has the effect of reducing the efficiency drop caused by this. In addition, since compressive force is applied to the joint by the elastic body 12, the overlapping part is always in close contact with each other, and this has the effect of increasing the airtightness of the heat insulation structure and reducing heat blowing out from the joint. is. In addition,
By bending the preheater 8, there is no displacement at the exterior plate portion, which has the effect of improving airtightness.

FIG. 4 shows another embodiment of the present invention, which is different from FIG. Board 1
3 to form a gap prevention plate 15. In this embodiment, it is possible to reduce the blowout of heat that convects in the space formed between the metal-coated heat-insulating structure and the piping.

〔Effect of the invention〕

According to the present invention, by providing an absorbing portion that fits together with a gap on the high temperature side of the metal-covered heat-retaining structure, it is possible to absorb the elongation due to thermal expansion, which has the effect of preventing deformation of the metal-covered heat-retaining structure. There is. During operation, the expansion gap can be brought into close contact with the other, so that the blowing out of heat from the crystal mud during operation can be reduced. °Since the adhesion of the still-adhesive part remains unchanged even if it is being displaced by heat, it is also effective in reducing heat blow-out. In addition, compressive force is applied to the overlapping part to increase the tightness of the contact part ('II configuration can also be made, and in this way, the maintenance τJM: +'iJ structure and the arrangement
It is also possible to improve airtightness. Furthermore, it is possible to form a structure 114 that can absorb the displacement of a preheating heater or the like that temporarily penetrates the entire exterior, thereby further improving the airtightness of the heat retaining structure.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing packing according to the prior art, and FIG. 2 is a cross-sectional view showing another prior art 1iq structure. FIG. 3 is a uR surface showing the structure of an embodiment of the present invention, and FIG. 4 is a folded view showing an example of displacement of the structure. 1, If... Structural unit, Ia, la... Close contact part,
Ib. mb...1 absorption part, ■...gap, 2...thermal insulation structure, 12 hanging liroki 30 4th country

Claims (1)

[Claims] 1. In a heat-retaining structure in which structural units made by covering a heat-insulating material with a metal plate are placed adjacent to each other, the structural unit has a contact portion that is in close contact with the adjacent structural unit, and a gap between the structural unit and the adjoining structural unit. Adjacent absorbing portions are provided, whereby the difference in offset due to expansion of the coating metal is absorbed by the absorbing portion, and the contact portion is always in close contact with the adjacent unit. A metal-coated heat-retaining structure featuring 2. The metal-coated heat-retaining structure according to claim 1, wherein the adhesive portion is biased by a metal elastic body so as to be always brought into close contact with the adjacent unit. 3. The metal-coated heat-retaining structure according to claim 2, wherein the metal elastic body has an inverted V shape provided at the joint between the structural units. 4. The metal according to any one of claims 1 to 3, characterized in that the end faces of the structural units are stepped and adjacent to each other, and the adhesion part and the absorbing part are formed. Covered thermal structure.