JPS5838216Y2 - Heat retention tube with end seal anchor - Google Patents

Description

[Detailed description of the invention] The present invention relates to m-tubes for transporting high-temperature or low-temperature fluids. Regarding.

As a heat-retaining pipe for transporting high-temperature steam or liquid, for example, a heat insulating layer is formed around the outer periphery of a main pipe 1 as shown in FIG. 1 using rock wool 2, foamed urethane 3, etc.
A protective tube whose outside is coated with a protective layer 4 such as a conduit is used.

When such heat insulation pipes are used as terminal heat insulation pipes and installed on anchors, structures, etc. in the field, conventionally, a cover material, etc. is attached to the outer surface of the rock wool layer, foamed urethane layer, etc. At the same time, an anchor plate was welded to the main pipe 1, and the legs of the anchor plate were fixed to the anchor.

However, when covering the cover material or welding the anchor plate on site, not only does the number of on-site steps increase and the construction period becomes longer, but the gap between the cover material and the main pipe increases. Rainwater, dust, etc. may enter through gaps etc. and damage the rock wool layer and foamed urethane layer, or the anchor plate may not be completely welded due to lack of welding skills on site workers, etc. Occasionally, situations occurred where the goals could not be fully achieved.

In addition, the anchor plate becomes hot due to heat transfer from the main pipe, and if it were brought into direct contact with the urethane foam, it would exceed the heat resistance temperature of the urethane foam, causing it to deteriorate or break. .

The present invention was devised to solve the drawbacks of the prior art as described above, and one embodiment thereof is shown in FIG.

As is clear from FIG. 2, at the end of the insulation tube, silicic acid is used instead of urethane foam 3 and rock wool 2 over a predetermined length to prevent the influence of high temperatures from the anchor plate. A heat insulating layer 5 made of a molded heat insulating material such as calcium or pearlite is provided, and its outer end surface is hermetically closed by an anchor plate 6.

This anchor plate 6 is welded to the main pipe 1 by a welding part 7, and the main pipe 1 and the anchor plate 6 are welded airtightly by a welding part r'.

On the other hand, the inner surface of the anchor plate has a ring flange 6'.
The outer circumferential surface of the collar 6' and the inner circumferential surface of the conduit 4 are bonded together with an adhesive to maintain airtightness.

As explained above, at the terminal end of the pipe closed by the anchor plate, the rock wool layer and the foamed urethane layer are replaced with a molded heat insulating material such as calcium silicate or perlite for a predetermined length. As a result, the urethane foam will not be damaged by the heat transferred to the anchor plate! A heat insulating tube whose terminal end is kept completely airtight and an anchor plate is reliably welded is manufactured in a factory, and then on-site.
By simply installing and fixing the heat-retaining tube to a part of the end anchor, not only can the number of work hours and construction period on site be significantly reduced, but also the insulation and airtightness of the end of the heat-retaining tube can be completely ensured. The damage to the heat insulating layer can be minimized.

In addition, in the field, the thermal insulation tube with the end seal anchor according to the present invention is installed in combination with a normal thermal insulation tube, that is, a straight pipe, but first, the installation position of the thermal insulation tube with an anchor is determined, and then the next straight pipe is installed. Since the piping is adjusted by cutting or connecting the lengths of the parts, pre-build production does not pose a problem with thin tubes.

Therefore, according to the present invention, there is no risk of rainwater, dust, etc. entering the rock wool layer or foamed urethane layer pipe from the terminal end, and the heat retention performance is maintained over a long period of time, maintaining the thermal efficiency as originally planned. can do.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a heat-retaining tube, FIG. 2a is a sectional view of the heat-retaining tube according to the present invention, and FIG. 2 is a side view thereof. 1... Main, 2... Rock wool, 3
... Curved urethane, 4... Conduit, 5.
・Curved insulation material, 6... Anchor plate, γ
······welded part.

Claims (1)

[Scope of utility model registration request] A rock wool layer, a foamed urethane layer, and a protective layer are formed around the outer periphery of the main pipe, and at one end, the rock wool layer and foamed urethane layer are molded with calcium silicate, perlite, etc. over a predetermined length. replaced by a heat insulating material, the outer end of the shaped heat insulating material being hermetically closed by an anchor plate connected to the main pipe and between the main pipe and the anchor plate and between the protective pipe and the anchor plate. A heat insulating tube with an end seal anchor that is kept airtight.