JPH038880Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Background and Purpose of the Invention] The present invention relates to improvements in heat-insulating cladding used in piping systems for hot water supply or air conditioning.

For example, in the piping system of a hot water heating system, in order to shuttle hot water between the heat source equipment and the terminal equipment, two series of heat-insulating cladding pipes are made by covering two conduits made of copper pipes with a coating material. However, as one such heat-insulating cladding, a tape with low emissivity is wound around two conduits arranged in parallel with a tape-shaped spacer between them, and the tape layer is wrapped around the tape layer. A linear spacer is loosely wound in a spiral shape, and a tape having a low emissivity is wound thereon to form a core having an air layer under the tape layer,
It has been proposed that the core is inserted into a corrugated tube made of synthetic resin and having a cross-sectional shape similar to that of the core.

Such a heat insulating cladding has small heat radiation loss and is easy to construct, but depending on the linear spacer, if an external force such as bending or compression is applied, the conduit may be locally damaged. This has the disadvantage that the conduit is locally significantly deformed.

An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide an improved heat insulating cladding tube in which the conduit is not locally deformed by external forces such as bending or compression.

[Summary of the invention] The gist of the invention is to use a foamed material or hollow synthetic resin material whose rigidity is smaller than that of the conduit as the spacer, and to deform the spacer before the conduit deforms even when external forces such as bending or compression are applied. The reason is that the force applied to the conduit is dispersed.

[Example] Hereinafter, the present invention will be explained with reference to the drawings. The heat-insulating cladding shown in FIG. 1 is composed of a core 6 and an exterior tube 7. The core 6 has a surface with a low thermal emissivity around two conduits 1 and 1' made of copper pipes, for example, which are arranged in parallel with a spacer 2 made of a synthetic resin tape with good heat resistance in between. For example, a tape made of paper or synthetic resin film laminated with glossy aluminum foil is wound spirally at a predetermined pitch, and a thin synthetic resin film is wrapped around the outer periphery of the tape 3, as shown in FIG. 2a. A linear spacer 4 consisting of a tube made of aluminum is loosely wound spirally at a predetermined pitch, and a tape 5 of the same type as the tape 3 is further wound spirally at a predetermined pitch with the glossy side inside. It has an oval cross section. However, this core 6
is inserted into an exterior tube 7 whose internal dimensions are slightly larger than the core 6, for example, a flexible tube made of synthetic resin and whose tube wall is corrugated and whose cross section is oval.

In the heat insulating cladding tube configured in this way,
The three layers of tape on the inside of the core 6 confine the space around the conduits 1, 1' and suppress heat transfer due to air convection, while the five layers of tape on the outside create an air layer between the three layers of tape on the inside. In addition to providing air insulation, it also reflects heat emitted from the inside in the form of radiation.
The heat radiation loss can be kept low, and the space between the core 6 and the outer tube 7 also acts as an air insulation layer, contributing to the reduction of the heat radiation loss. Furthermore, the outer tube 7 can compensate for the lack of mechanical strength of the core 6. Of course, since the exterior pipe 7 is a corrugated pipe, it has a suitable degree of flexibility and is easy to handle during construction.

However, since the linear spacer 4 in the core 6 is made of a synthetic resin hollow material that is less rigid than the conduits 1 and 1', it can be used even when external forces such as bending and compression are applied to the heat insulating cladding during piping work. , the spacer 4 deforms before the conduit in that part is deformed to disperse the force applied to the conduit, thereby preventing the conduit from being locally deformed.

Such effects of the linear spacer 4 can also be obtained by forming the linear spacer 4 from a foamed material, as shown in FIG. 2b.

[Effect of the invention] As is clear from the above explanation, according to the present invention, by selecting the material of the linear spacer,
It is possible to prevent local deformation of the conduit due to external forces such as bending and compression, so it not only can withstand large external forces, but also has the advantage of being able to reduce the bending radius of the heat insulating cladding, which improves workability. But it is advantageous.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the heat insulating cladding according to the present invention, FIG. 2 a is an enlarged cross-sectional view of the linear spacer, and FIG. 2 b is a cross-sectional view showing another embodiment of the linear spacer. This is an enlarged view. 1, 1': Conduit, 2: Tape-shaped spacer, 4:
Linear spacer, 6: core, 3 and 5: tape with low emissivity, 7: outer tube.

Claims (1)

[Scope of utility model registration request] A tape having a low emissivity is wound around two conduits arranged in parallel with a tape-like spacer interposed between them, and a linear spacer is loosely wound in a spiral around the tape layer. In a heat insulating cladding tube in which a core on which a tape having a low emissivity is wound and an air layer is provided below the tape layer is inserted into a corrugated tube having a cross-sectional shape similar to that of the core, the wire A heat insulating cladding pipe characterized in that the shaped spacer is made of a foam material or a hollow synthetic resin material.