JPS61192994A - Heat insulator for pipe - 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 heat insulation structure, and more particularly to a heat insulation structure for a tube group suitable for a primary cooling system piping group of a pressure tube nuclear reactor containing high-temperature fluid.

[Background of the invention]

A conventional heat insulation structure for the group of tubes 1 is disclosed in Japanese Patent Application Laid-Open No. 59-23
No. 177, and FIG.

As shown in FIG. 16, thermal expansion occurs between the wire 2 and the heat insulating material 6 by connecting the wire 2 to the wall 4 as a heat insulating support material and adjusting the length of the wire 2 with the adjustment fitting 3. A method is known that eliminates the gap caused by the difference and increases the heat retention effect. However, in this method, since the wire 2, which is a heat-retaining support component, is provided inside the heat-insulating material 6, it is necessary to check or adjust the tension of the wire each time the operation is performed, and the support material of the wire itself is As shown in Figure 2, since it penetrates the insulation material and has a box-shaped insulation structure, convection occurs within the duct, and there was a concern that the amount of heat would dissipate more than the actual amount, especially when the number of pipes increased. .

In addition, in recent years, piping integrity checks (ISI) have been required for each periodic inspection of nuclear couplers, etc., and as a result, the work time spent installing and removing thermal insulation is required to reduce radiation exposure for workers. , has been regarded as important. FIGS. 17 and 18 mainly show the exterior plate structure of the conventional heat insulation structure. As shown in this figure, the heat-insulating exterior plate 5 was made of metal, and the sealing method was overlapping. In addition, the internal heat insulating material 6 is shaped (
Since the insulation is broken in the form of a plate, it is not easy to repair it if the heat insulation is removed in the above-mentioned ISI, and no consideration has been given to this aspect.

In addition, as an alternative to the above, there is a method in which the heat insulation type is metal heat insulation, and each heat insulation block is fastened with a buckle structure, so that it can be attached and detached. There were problems in that it was not easy and the cost was high.

Therefore, in order to solve the above problem, it was necessary to review the heat retention structure including the mounting position of the heat retention support material.

[Purpose of the invention]

An object of the present invention is to provide a heat retention structure that radiates less heat.

[Summary of the invention]

The Reimoto configuration of the present invention is a heat retaining device comprising a heat retaining means surrounding the outside of a pipe and a wire supporting the width retaining means, in which the wire is arranged outside the heat retaining means and is supported from the wire. A heat retaining device for a tube, characterized in that the heat retaining means is supported through a tool, in which the wire through-hole is eliminated in the heat retaining means, and the amount of heat transferred from the heat retaining means to the wire is reduced, so that the tube has a small heat dissipation property. It can be used as a thermal insulation device.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 14.

A heat insulating material 6 is installed around the joint of the piping 1 through which the pigeon warm fluid flows in order to reduce the amount of heat dissipated. There is still a gap between the piping and the heat insulating material so that the weight of the heat insulating material does not exceed the weight of the pipe. A support 8 for supporting the heat insulating material is provided on the outer surface of the heat insulating material 6, and is attached to the support wire 2 via a sleeve 7. Further, the support wire 2 is connected to the wall 4 through the adjustment fitting 3.
is fixedly supported.

As shown in FIG. 1, the heat insulating material 6 laid around the outer periphery of the pipe is divided into a plurality of blocks in consideration of attachment and detachment work. As shown in FIGS. 2 and 3, the heat insulating material 6 is made of a flexible material 1, for example, the dark wall of the heat insulating material 6 can be made of asbestos cloth.
It is covered with 0a and 10b to form a heat insulation block. This is provided to facilitate attachment and detachment of the heat insulating material 6 and to prevent damage.

In addition, as the material of the above-mentioned covering material, for example, a synthetic material is preferable from the viewpoint of workability. In addition, when a material is used, it should be waterproof and have excellent heat resistance so that the heat insulating material contained therein does not absorb moisture.

On the other hand, the heat insulating material inserted into the food materials 10a and 10b is preferably a material that has an excellent heat insulating effect and is lightweight and flexible from the viewpoint of workability.

As shown in FIG.
It has a structure that can be sealed with sealing materials 9a and gb.

This structure has adhesive properties, and the sealing materials 9a and 9b are easily peeled off so that they can be used repeatedly, for example, a hook-and-loop fastener structure. In addition, in order to improve the sealing performance, see FIGS. 3 and 9.

As shown in FIG.
It has a structure in which it wraps.

As shown in Fig. 3.7.8, the structure of the support 8 that supports the heat insulation block is achieved by selecting the hole C into which the bolt/nut type fastening means 11 is inserted, thereby connecting the heat insulation outer surface and the support wire 2. It has a function that allows you to adjust the distance freely. This has the purpose of absorbing installation errors that occur during insulation insulation construction, and also has the effect of transmitting the heat insulation outer surface temperature to the support wire 2.

From the standpoint of hat construction, it is preferable that the material of the support 8 is the same as that of the heat-insulating covering material. Incidentally, the f-power applied to the support 8 is only the heat insulation block overlapping sound. Also,
The mounting path to the heat insulation block should be similar to that of the heat insulation support wire 2.

Figure 4.5.6 shows the procedure for insulation 1 and 1. First, the heat retention support wire 2 is laid. Next, the support 8 provided at one end of the bed heating block is attached to the support wire 2. and fold the insulation block in the direction of arrow B.

Next, the support 8 provided on the heat insulation block is attached to the support wire 2. At the same time, the support pins provided at the bottom etc. are also attached at the same time. Finally, seals 9a and 9b between the heat insulation blocks are completed.

FIG. 9 and FIG. 10 show a method of forming a heat insulating block.

Fold along the imaginary line as shown in FIG. 8 and form as shown in FIG. 7. Further, the adjacent heat insulation blocks are also molded in the same manner, and then moved in the E direction and attached.

Sealing material 9a with hook-and-loop fastener is shown in FIGS. 11 and 12.
, 9b shows the seal procedure. The sealing material 9ai is bent and wrapped on the sealing material 9b to be brought into close contact.

As shown above, according to this embodiment, by blocking the heat retention, the heat retention support wire 2 can be taken out of the beads and the material, and as a result, gaps etc. are reduced, and the tube Since the outer surface area of the group insulation material is reduced, it has the effect of suppressing the dissipated heat t.

In other words, it can provide a heat retaining effect.

In addition, by making the insulation material into blocks and making it removable, it is easier to perform installation work and ISI work (insulation installation and removal work)1.As a result, for example, in nuclear couplants, the exposure exposure of workers can be reduced. There are effects that can be achieved.

Furthermore, with regard to the heat preservation restoration work, conventional techniques would have been required, but according to the present invention, this is not particularly necessary. Therefore, there is an effect of reducing costs.

Figures 13 and 14 show examples of application of the present invention.

In this embodiment, a fastener 12 is provided on the outside of the sealing material 9. According to the invention, for example, even if an external force is applied to the heat insulating material, it is received by the fastener 12, so there is an effect that the integrity of the seal portion is maintained.

According to each embodiment of the present invention, in Kangunpo@Denzo, the heat insulating material is made into a gold block, and the heat insulating support wire is disposed outside the heat insulating material, and the elongation of the support wire is limited to the elongation at room temperature. and penetrate through the heat insulating material. The wire unbreakability can be reduced to less than half compared to the conventional method, and since the surface area outside the tube group can also be reduced, the amount of heat dissipated can be reduced to less than half compared to the conventional method.

In addition, by making the heat insulating material flexible, forming blocks, and making it removable, heat insulating construction becomes easier and costs can be reduced.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to support the heat insulating material without the need to provide a through hole for the wire in the 1M1L material or to pass the wire through the space surrounded by the heat insulating material, thereby preventing heat dissipation better than ever before. As a result, the heat retention effect is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a top plan layout diagram of a wire according to an embodiment of the present invention;
FIG. 2 is a partially sectional perspective view of the wire and heat retaining portion shown in FIG. 1, FIG. 3 is a vertical sectional view of the heat retaining portion shown in FIG. 1, and FIGS. 4 and 5. Fig. 6 is a perspective view showing step-by-step the procedure for maintaining the shape of the heat insulation device shown in Fig. 1M, Fig. 7 is an enlarged detailed view of the main part of Fig. 3,
Fig. 8 is a side view of Fig. 7, Fig. 9 is a perspective view of the heat insulating unit block of the heat insulating means shown in Fig. 1, and Fig. 10 is a developed view of the heat insulating unit block shown in Fig. 9. Fig. g11 Vi A perspective view of the sealing structure between the 70 pieces of the temperature measuring unit of the larva preservation means shown in Fig. 1 before sealing, Fig. 12 is a perspective view after sealing, and Fig. 13 shows another example of the present invention. Figure 14 is a front view showing the part between the heat insulation single blocks using the material.
Figure 15 is a perspective view showing the wire arrangement of a conventional heat retention device, Figure 16 is a vertical sectional view of a conventional heat retention device, and Figure 17 is a detailed cross section of the part surrounded by the N arrow in Figure 418. FIG. 18 is a perspective view of a heat retaining means of a conventional heat retaining device. 1... arrangement θ, 2... wire, 3... adjustable crab fittings,
5... Exterior board, 6... Bolt material, 8... Supporting tool, 9
a, 9b... Seal material, lOa, Job... Covering material, 12... Fastener.

Claims (1)

[Scope of Claims] 1. A heat insulating device comprising a heat insulating means surrounding the outer periphery of a tube and a wire supporting the heat insulating means, in which the wire is disposed outside the heat insulating means, and a support is removed from the wire. A heat retaining device for a tube, characterized in that the heat retaining means is supported through a tube. 2. The tube heat retaining device according to claim 1, wherein the heat retaining means is a plurality of divided bodies. 3. The tube heat-retaining device according to claim 1 or 2, wherein the heat-retaining means comprises a heat-retaining material covered with a flexible covering material. 4. The heat retaining means includes mating end surfaces that are long in the tube axis direction, a seal that covers the mating line of the mating end surfaces, and a seal provided around the divided ends of the heat retaining means. The tube heat retention device according to item 2. 5. The tube heat-retaining device according to claim 4, wherein the heat-retaining means comprises a heat-insulating material covered with a flexible covering material. 6. The heat preservation device for a pipe according to claim 2 or 4, wherein the heat preservation means is provided with a tightening tool between the divided bodies, with the tightening direction directed toward the tube axis direction. . 7. The tube heat-retaining device according to claim 6, wherein the heat-retaining means comprises a heat-insulating material covered with a flexible covering material.