JPH0514078Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] This invention relates to a dew-proof cover for piping.

[Conventional technology]

BACKGROUND ART Conventionally, various types of hot and cold piping have been equipped with heat insulating covers made of foam material to improve their heat insulation properties. However, it was found that the insulation cover alone was not able to completely prevent condensation.
Therefore, the inventors considered providing a layer made of a water absorbing agent on the outer peripheral surface of the heat insulating cover.
The water absorbing agent absorbs and retains moisture on the surface of the cover, thereby preventing the occurrence of dew condensation, and releases the moisture once absorbed at an appropriate time.

[The problem that the idea aims to solve]

However, even when attempting to adhere the water absorbing agent to the heat insulating cover, it was found that the adhesion was not sufficiently performed. As a result, some parts are bonded and some parts are not bonded between the water absorbent layer and the heat insulating cover, causing a problem in that the water absorbent layer partially floats or wrinkles, which impairs the appearance. In the areas that are not bonded as mentioned above, voids are formed on the back side of the water absorbing layer, and the absorbed and retained water enters into these voids, resulting in low moisture release. There is also the problem that the water absorption function becomes inefficient and non-uniform as the water is no longer uniform throughout the pipe.

In view of the above-mentioned disadvantages, this invention provides a condensation-proof cover for piping that has excellent bonding and fixing ability of the water-absorbing layer, which allows the water-absorbing layer to be attached with a good appearance and to perform the water-absorbing function efficiently and uniformly. is intended to provide.

[Means to solve the problem]

In order to achieve the above object, this invention is equipped with a tubular condensation-proof cover body made of plastic foam, and a water absorbing layer supporting the outer circumferential surface of this body with a large number of fine voids between the fibers. Its gist is a dew-proof cover for piping that has a protective outer covering.

[Effect]

If a water-absorbing layer-carrying outer covering with many fine voids between fibers is formed on the outer circumferential surface of the dew-proof cover body made of a plastic foam material with excellent heat insulation properties, a water-absorbing layer will be formed on top of it. When it is formed, the water absorption layer enters into the fine gaps between the fibers of the outer cover and is firmly held and fixed. The outer sheath and the cover body can be reliably joined by means such as hot-melt lamination or adhesive, so as a result,
The water absorbing layer is reliably and firmly fixed to the cover body via the outer covering.

〔Example〕

Examples of this invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of a condensation-proof cover for piping according to this invention, cut away and viewed diagonally from above. As shown in FIG. 2, which shows its cross section, this condensation-proof cover 1A for piping is already equipped with a pipe 2 (a copper pipe in this embodiment) that serves as a hot and cold pipe, and a tubular pipe is placed on top of the pipe 2 (copper pipe in this embodiment). A dew-proof cover main body 3 is attached, and an outer sheath 4 for supporting a water absorption layer is formed on the entire outer peripheral surface of the cover main body 3. Pipe 2, which becomes hot and cold piping, is
It is not limited to copper pipes, and stainless steel pipes, engineered steel pipes, steel pipes, etc. may also be used. The cover body 3 is made of plastic foam. As such a foam material, various known foam materials can be used. Typical foaming materials include polyolefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, chlorinated polyethylene, ethylene-vinyl acetate copolymer, and blend polymers of at least two or more of these. Examples include vinyl chloride resins such as polyvinyl chloride and copolymers thereof. Note that the surface of the cover body made of a foamed material as described above does not necessarily have to be smooth; for example, as in the piping material 1G shown in FIG. may have unevenness. If it goes like this,
This is because an air layer 9 is interposed between the pipe 2 and the outer circumferential surface of the pipe 2, thereby further increasing the heat insulation effect. The outer sheath 4 is provided to improve the adhesion of the water absorbing layer 5, and is made of a material having many fine voids between fibers, such as a raised fabric or a nonwoven fabric. With materials like this,
This is because a portion of the water absorbing layer 5 enters into the fine voids between the fibers, so that the water absorbing layer is likely to be sufficiently held and fixed. Examples of nonwoven fabrics include webs made of natural fibers, staple fibers made of polyester, polyamide, vinylon, polyolefin polymers such as polyethylene and polypropylene, woven or knitted fabrics of filament ears, and filaments of various synthetic fibers. Alternatively, it is also possible to use a grid-like net made of spun yarn. The thickness of the carrier jacket 4 may be very thin, usually less than 1 mm. The supporting outer sheath 4 is fixed, for example, by heat-melting lamination, in which the surface of the cover body 3 is melted by heating and the supporting outer sheath 4 is adhered thereto. However, it may also be done using an adhesive. The carrying envelope 4 may be formed by wrapping its own layered member around the cover body 3, or may be formed by spraying fibers onto the outer peripheral surface of the cover body 3. In the former case, there are two cases: a narrow-width piece is wound with both edges butted against each other, and there is a case where it is wound in a so-called gaiter winding style. The water-absorbing layer is not particularly limited as long as it is made of a material containing an inorganic compound or an organic compound (including a polymer) that has water-absorbing and water-retaining properties. Examples of inorganic compounds include silica gel, colloidal silica, calcium silicate, diatomaceous earth, vermiculite, and mica; examples of organic compounds include starch, kraft polymers of acrylates, crosslinked carboxymethyl cellulose, and vinyl. Examples include alcohol/acrylate copolymers, hydrolyzed polyacrylonitrile, crosslinked polyacrylates, and modified polyvinyl alcohol.

In this invention, the condensation-proof cover for piping is the third
The cover 1B may not include the pipe 2, like the dew-proof cover 1B for piping shown in the figure. In this case, the cover body 3 is used by wrapping it around the existing on-site piping. To this end, the main body 3 is previously formed into a tubular shape, and is usually split in the back with a notch 7 made in the axial direction of the cover main body 3 in order to allow the on-site piping to be inserted into the pipe insertion hole 6 of the main body 3. . A water absorbing layer 5 is formed on the jacket 4. The condensation-proof cover for piping is one that is equipped with two piping insertion holes 6 for passing the two piping 2, 2, or three or more piping insertion holes, as shown in Fig. 4 1C. It may be something like that. Third
As shown in the figure, when the cover body 3 is made into a split-back type, the supporting jacket 4 is left unjoined at the notch 7 of the cover body 3, and the pipe insertion hole 6 is After the piping is inserted, the cut portion is covered with the surplus portion 4a of the supporting sheath 4, and the end edge of this surplus portion 4a is overlapped with the other end edge 4b of the sheath 4 for joining. Good. The remaining portion 4a is covered with adhesive or cover body 3.
It is best to fix by adhesion using the same material (emulsion).

The condensation-proof cover for piping according to this invention is thus provided with the outer sheath 4 for supporting a water absorbing layer on the outer peripheral surface of the cover main body 3, so that the outer peripheral surface of the cover main body 3 has water absorbing and water retaining properties. When a water absorbing layer 5 containing an inorganic or organic compound (including a polymer) is applied by adhesion or coating, the supporting jacket 4 more easily and effectively transfers this water absorbing layer 5 to the cover body 3 side. It can be fixed. As a result, not only can the formation work of the water absorbing layer 5 be performed extremely efficiently and reliably, but also the adhesion between the water absorbing layer 5 and the cover body 3 becomes better.
No space remains between the water absorption layer 5 and the cover main body 3, which improves the appearance and improves moisture dissipation, thereby making it possible to exhibit uniform water absorption.

In the dew-proof cover for piping according to this invention, as shown in FIG.
It may be 1D in which two members 8 each having a supporting jacket 4 formed thereon are fixed in parallel.
In the figure, 2 is a pipe, and 5 is a water absorption layer. In the piping dew-proof cover 1D shown in this figure, the diameters of the two piping insertion holes 6 and 6' are different, but they may be the same. Furthermore, three or more members 8 as described above may be fixed in parallel or in a bundle.

The condensation-proof cover for piping according to this invention is not limited to one that extends straight, but may be curved or T-shaped. For example, it may be hook-shaped to form an elbow joint, as shown in Figure 6, or it may be T-shaped to form a cheese joint, as shown in Figure 7. It may be as follows. In both figures, 1E and 1F are dew-proof covers for piping, 3 is a cover body, 4 is a supporting jacket, and 6 is a piping insertion hole, respectively.

The outer cover 4 has a mesh net on the back side (not shown)
It may be lined with a backing material such as. By doing so, even if the outer cover is extremely thin, it is prevented from elongating and is reinforced, so that effects such as ease of joining to the cover body 3 can be obtained. When the water absorption layer is an inorganic compound, its flame retardancy improves the flame retardancy of the piping dew-proof cover.

The water absorbing layer 5 can be applied to the surface of the cover body after construction of the cover body, or may be formed integrally with the cover body before construction. That is, the dew-proof cover for piping according to this invention may have a water-absorbing layer formed in advance. The cover main body 3 may be made flame retardant by, for example, containing a flame retardant. The cover main body 3 is not limited to a single layer, and may have multiple layers. For example, it may have a two-layer structure, with an inner layer made of polypropylene foam material or a polyethylene-polypropylene mixed foam material with excellent heat resistance, and an outer layer made of polyethylene foam material.

[Effect of idea]

As has been seen above, the dew protection cover for piping according to this invention comprises a tubular dew protection cover body made of plastic foam material, and on the outer surface of this body is formed an outer covering for supporting the absorbent layer which has a large number of fine gaps between the fibers. This improves the adhesion of the absorbent layer to the cover body, allows the absorbent layer to be attached with a good appearance, and also ensures efficient and uniform water absorption function.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the condensation-proof cover for piping according to this invention, Fig. 2 is a cross-sectional view thereof, and Fig. 3 is an embodiment using a split-back type cover body. A perspective view, Fig. 4 is a sectional view showing an embodiment used for two parallel type piping, Fig. 5 is a sectional view of another embodiment used for two parallel type piping, and Fig. 6 is an elbow joint. FIG. 7 is a perspective view of an embodiment used as a cheese joint, and FIG. 8 is a sectional view of an embodiment provided with a cover body having an uneven inner peripheral surface. 1A to 1G... Condensation-proof cover for piping, 3... Cover body, 4... Outer cover, 6, 6'... Piping insertion hole.

Claims (1)

[Claims for Utility Model Registration] (1) A tubular condensation-proof cover body made of a plastic foam material is provided, and the outer circumferential surface of this body is provided with a water-absorbing layer supporting material having many fine voids between the fibers. A condensation-proof cover for piping that has an outer sheath. (2) The dew-proof cover for piping according to claim 1 of the utility model registration claim, which is integrated with the piping in advance.