JPS60237295A - Heat-insulating execution method of piping member - 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] The present invention provides pipes, etc. for circulating steam, refrigerant gas, etc.
The present invention relates to a method of insulating a piping member to be insulated from the outside atmosphere.

Conventionally, various methods have been known as insulation construction methods for this type of piping member. One such construction method is to cover piping members such as pipes with a heat insulating material such as asbestos, and then cover and exteriorize the heat insulating material with a tape-like cloth, but this method is mostly limited to indoor use. If this construction method is applied to piping components placed outdoors, rainwater, dew, etc. will penetrate into the insulation material through the cloth that serves as the exterior material, resulting in a significant loss of insulation properties of the insulation material. This is because it will be lost. For this reason, for members such as pipes placed outdoors, a method is generally used in which the pipe is coated with a heat insulating material and then the heat insulating material is wrapped in a steel plate. As specifically shown in FIG.
Zinc iron wire 12 or the like is wrapped around the insulation material covered with 0, and the insulation material 14 is tightened.
The ends 18 are then joined together with a seam as shown in FIG. However, the construction method using such steel plates as exterior materials requires the work of covering the pipes with heat insulating material, the work of wrapping the steel wire, the work of wrapping the steel plate from the outside, and the work of wrapping the steel plate around the ends of the steel plate. It is necessary to join the joints together, and also to fill the joints between adjacent steel plates with a sealant, and joining the joints is a difficult task. Therefore, there was a problem that the overall construction time was extremely long.

Furthermore, since the above-mentioned seam joint requires special techniques, it can only be done by an experienced person.Additionally, when steel plates are used as the exterior material, it is difficult to maintain sealing properties. There were also problems. This is because when exposed steel plates repeatedly expand and contract due to temperature changes, their seam joints become loose. Also,
Such a steel plate is susceptible to mechanical impact, and such impact causes deformation and cracking, which also causes loss of sealing performance.

The present invention was developed against the background of the above circumstances, and its purpose is to facilitate the construction work, take only a short time, and maintain good sealing properties after construction. An object of the present invention is to provide a method for insulating piping members at low cost.

In order to achieve such an object, the present invention covers piping members that should be insulated from the outside atmosphere with a heat insulating material, and also includes a reinforcing layer made of a thin layer of a large number of fibrous materials, The heat insulating material is covered with an elastic, moisture-permeable and waterproof exterior material formed in advance into a sheet or tape shape, which is formed by overlapping directly or indirectly with a porous resin film having micropores. This is how it was done.

In addition, it is desirable that the waterproofness of the exterior material is 400 mm or more according to the water resistance method A (low water pressure method) of JIS L 1092 (waterproof test method for textile products), and 500 m or more.
It is more desirable that it is 1000 mm or more, and particularly desirable that it is 1000 mm or more.

In addition, in recent years, those with a length of about 2000 mm have also been commercially available. Regarding moisture permeability, the numerical value according to the cup method of JIS Z 0208 (moisture permeability test method for moisture-proof packaging materials) is 5.
00 g/%/24hr or more is desirable,
More preferably 1000 g/rd/24hr, 2500 g/n? /24hr is especially desirable, but in recent years it has been 6000g/r+?
/ About 24 hours are also commercially available.

In order to satisfy the conflicting demands of waterproofness and moisture permeability, it is desirable that the exterior material be treated with water repellency.

According to the present invention, the work can be completed by simply covering piping members such as pipes with a heat insulating material and covering the heat insulating material with a moisture permeable and waterproof exterior material.

Exterior materials coated with heat insulating materials have a waterproof function due to the porous resin film having a large number of micropores, so when this construction method is applied to components placed outdoors, rainwater, N Water, dust, etc.

Foreign matter such as dust does not pass through the exterior material and enter the inside of the heat insulating material, and good heat insulating properties are maintained over a long period of time.

When covering a heat insulating material with an exterior material, if a sheet-like material is used as the exterior material, the sheet should be wrapped so that its ends overlap in the direction (circumferential direction) and that the adjacent sheets overlap. Cover the insulation material so that the boundary with the sheet overlaps,
In addition, when using a tape-like material, cover the insulation material so that both ends of the tape in the width direction overlap, and when using a combination of the two, make sure that the ends overlap. By covering the heat insulating material, the heat insulating material can be covered with the sheathing material without creating a gap between the sheet-like or tape-like sheathing material and the sheathing material. When using a sheet-like material as an exterior material, it is necessary to join both ends in the circumferential direction, but this can be easily done by adhering adhesive or adhesive material to at least one end in advance. can be achieved.

That is, they can be joined simply by overlapping one end on the other. In addition, when using a tape-like material, it is sufficient to wrap the exterior material in sequence along the heat insulating material, so such work is not particularly necessary. In any case, according to the present invention, unlike the case where steel plates are used as exterior materials to save heat insulation, troublesome joining work such as joining the ends of steel plates is not necessary, and the heat insulation construction is easy. It can be done easily and in a short time.

Moreover, since the exterior material used in the present invention is given a certain tensile strength by the reinforcing layer made of a delicate material, the heat insulating material can be tightened at the same time as covering the heat insulating material. Therefore, it is no longer necessary to tighten the heat insulating material with iron wire or the like prior to sheathing the heat insulating material. Moreover, this exterior material has elasticity and allows the joints between the exterior materials to be brought into close contact, so it is difficult to fill the seams with sealing material after covering the insulation material with the exterior material. That is not particularly necessary either. However, it is conceivable that rainwater, etc. may infiltrate into the interior through the seams of the exterior materials due to capillary action, but if this causes any inconvenience, apply adhesive tape or the like to the joints beforehand. By fixing the materials, etc., when covering the insulation material with the exterior material, the joints will be fixed simultaneously without any gaps, and rainwater, etc. will be prevented from penetrating into the interior through the joints due to capillary action. be done. Therefore, even in such a case, the work of filling the gap with the sealing material after covering the heat insulating material with the exterior material is omitted. This makes the insulation work simple and easy, and the work time is significantly shortened. In addition, since the exterior material used in the present invention has moisture permeability, in cases where the insulation material is a water-edge material, after the insulation material is formed into a predetermined shape, it cannot be heated until it is completely dry. It has the advantage that it can be used for construction without waiting. When using steel plates as exterior materials, if the insulation is half-dried, moisture will not escape to the outside and remain inside the insulation material after installation, impairing its insulation properties, and the moisture will also cause rust on the steel plates. However, in the present invention, even if the insulation material remains half-dry, it can escape as moisture to the outside through the exterior material, so the insulation properties are not impaired. Naturally, problems such as rust will not occur.

That is, in the present invention, it is possible to use the heat insulating material for construction without waiting until it is completely dry, and thereby the construction time can be further shortened.

In this way, according to the present invention, the time required for insulation construction is significantly shortened, and all the materials used are inexpensive, so construction costs are significantly reduced. Since it does not require advanced technology, it has various benefits, such as anyone being able to easily install it or repair broken parts.

The exterior material used in the present invention has the feature of being able to maintain good sealing properties for a long period of time after being coated with a heat insulating material. Because such exterior materials have elasticity, even if they repeatedly expand and contract due to temperature changes, they will not peel off at the joint between the sheet or tape-like exterior materials, and they will not peel off mechanically. This is because even if an impact force is applied, there is no problem of deformation or cracking due to the impact force, and no gaps are created at the joints or seams.

Next, embodiments of the present invention will be described in detail based on the drawings. Figures 3 and 4 show the state after completion of construction. In the figures, 20 is a pipe for circulating fluids such as steam and refrigerant gas, and is made of a heat insulating material 22 such as asbestos or glass wool. covered by. Further, the heat insulating material 22 is tightly covered with a moisture permeable and waterproof exterior material 24.

The first step for insulating the pipe 20 in such a state
The step is to cover the pipe 20 with a heat insulating material 22, and this operation is performed as follows. That is, a heat insulating material 22 formed into a cylindrical shape having a crack 26 is prepared in advance, and this is inserted into the pipe 20 at the crack 26 to cover the pipe 20. The end surface of the cylindrical heat insulating material 22 is formed flat, so if such heat insulating materials 22 are placed one after another on the pipe 2o and arranged one after another, the entire vibe 20 will be covered with the heat insulating material 22. state. Pipe 20 by insulation material 22
After the work of covering the heat insulating material 22 is completed, an exterior material 24 previously formed in a tape shape is wrapped around the heat insulating material 22 from the outside.

This exterior material 24 is made by coating the surface of a cloth made of woven fibers such as nylon with a porous resin material having a large number of micropores, or by applying a porous resin material having a large number of micropores to the surface of the cloth, or by applying porous resin material having a large number of micropores on the surface of the cloth, or by applying a porous resin material having a large number of micropores to the surface of the cloth made by weaving fibers such as nylon. It is formed by laminating high quality resin materials.

The micropores in the resin film allow only moisture to pass through, but not water, thereby imparting moisture-permeable and waterproof performance to the exterior material 24. Further, the exterior material 24 is given appropriate elasticity and strength by cloth as a reinforcing material. Such materials are commercially available as materials for rain gear and the like under the trade names Microtex and others. This exterior material 24 is
As shown in FIG. 5, it is in the form of a tape, and adhesive material 28 is fixed to both ends in the width direction. As the adhesive material 28, for example, double-sided adhesive tape is used. In order to cover the heat insulating material 22 with such a sheathing material 24, one end of the tape-shaped sheathing material 24 is fixed to one end of the heat insulating material 22 inserted into the pipe 20 and arranged in a row, or one end of the tape-shaped sheathing material 24 is Insulating material 2 while holding it by hand etc.
While pulling the exterior material 24 with a constant force, wrap it around the end of the 2 and a half or two turns. At this time, the release paper attached to the surface of the double-sided adhesive tape as the adhesive material 28 is peeled off in advance (or the exterior material 24 is wrapped while peeling off the release paper).

When the sheathing material 24 is wrapped around one and a half or two turns around the end of the heat insulating material 22, the heat insulating material 22 inserted into the pipe 20 with a gap 26 formed is tightened at the end. As a result, the crack 26 is closed, and the overlapping portions of the exterior materials 24 are fixed by the adhesive action of the adhesive material 28. Thereafter, as shown in FIG. 6, the tape-shaped exterior material 24 is wrapped along the longitudinal direction of the insulation material 22 so that the ends in the width direction overlap, so that the insulation material 22 wraps the exterior material 24. At the same time, they are fastened to each other at the overlapping part of the third roll and the third roll of the sheathing material 24, or at the overlap between the third roll and the fourth roll. . Then, when the tape-shaped exterior material 24 is wrapped around the end of the second insulation material 22, if the end of the exterior material 24 is fixed to the insulation material 22 or the exterior material 24 wrapped around this, the pipe 20 Insulation work is completed.

If the pipe 20 is insulated according to the above-mentioned construction method, the work can be completed very simply, easily, and in a short time.Moreover, since no particularly difficult work is involved, no skill is required for the work. Moreover, since the exterior material 24 itself is inexpensive, construction costs are significantly reduced compared to conventional methods.

Note that since the exterior material 24 has appropriate elasticity, the overlapping seams of the portions wrapped around the heat insulating material 22 can be in close contact with each other without creating a gap, but the adhesive material 28 The adhesive material 28 itself acts as a sealing material, so that water flows through the seams through capillary action and the adhesive material 28 itself acts as a sealing material. There is no chance that it will get inside.

Although one embodiment of the present invention has been described in detail above, the present invention can be implemented in various other different embodiments.

For example, the present invention can be applied not only to a straight pipe as shown in FIG. 6, but also to a pipe provided with a portion of an elbow as shown in FIG. In this case, since the sheathing material 24 has appropriate elasticity and easily adapts to the shape of the pipe 20, it has the advantage of being easier to work with and having better sealing properties than other construction methods.

Further, as the exterior material, it is possible to use not only a tape-like material as described above but also a sheet-like exterior material 30 as shown in FIG. 8. When using such a sheet-like exterior material 30, when wrapping it around the heat insulating material 22, it is necessary to ensure that both ends in the wrapping direction (circumferential direction) overlap, and that both ends of adjacent exterior materials overlap. Do it like this. In this case, as shown in FIG. 8, the sheet-like exterior material 30 has the above-mentioned It is convenient to use a double-sided adhesive tape as the adhesive material 28 to improve workability and sealing performance. In addition, when wrapping the exterior material 30 around the heat insulating material 22, as shown in FIG. It's a good idea to shift it slightly so it doesn't line up with the seam.

As another embodiment of the present invention, as shown in FIG. 10, the exterior material 32 is fixed to the heat insulating material 22 in advance, and when performing insulation construction, the heat insulating material 22 is attached and the exterior material 32 is attached at the same time. It is also possible to Only one end of the exterior material 32 in the circumferential direction is separated from the heat insulating material 22,
When the heat insulating material 22 with the exterior material 32 fixed to it is inserted into the pipe 20 as shown in FIG. 11, its free end 34 is overlapped with the end on the side fixed to the heat insulating material 22. At this time, if an adhesive tape as the above-mentioned adhesive material 28 is fixed to the free end 34 of the exterior material 32, the overlapping ends can be joined at the same time. In addition, the exterior material 32
When the axial width of is the same as the width of the insulation material 220,
As shown in FIG. 12, when the joint portion between the exterior materials 32 is covered with a narrow tape-shaped moisture permeable and waterproof exterior material 36, the exterior materials 32, the exterior materials 32, and the heat insulating material are covered. It is possible to effectively prevent rainwater or the like from entering the interior through the joint between the heat insulating material 22 and the heat insulating material 22. In this case, instead of the tape-shaped moisture-permeable waterproof exterior material 36, it is also possible to use waterproof adhesive tape or other materials.

As another method, as shown in FIG.
and the heat insulating material 22 are fixed in advance in a state where they are shifted in the axial direction, and the end 40 of the exterior material protruding from one end of the heat insulating material 22 is placed over the end of the adjacent heat insulating material 22. It is also possible.

Several aspects of the present invention have been described above, and the present invention relates to foamed polyurethane and foamed polystyrene.

It is also possible to use foam rubber or other insulation materials,
Moreover, the exterior material 38 used can also be made of various materials in addition to those exemplified above. For example, the reinforcing layer is not limited to one made of woven fibers, but may also be made of a non-woven fabric in which fibers are simply joined together, or a material in which many fibers are simply arranged. Also, the porous resin film does not have to be directly overlaid on the reinforcing layer (but may also have other layers interposed therebetween).

Further, in the above embodiment, the case where the joints of the exterior materials are fixed to each other with an adhesive material has been explained as an example, but it is of course possible to use an adhesive material instead of such adhesive material. However, it is also possible to use a foamed elastic sealing material, such as foamed polyurethane, which exhibits waterproof performance with a low compression rate, instead of the expensive adhesive or adhesive material. By wrapping the exterior material around the insulation material while pulling it with a predetermined force, the sealing material is compressed and becomes waterproof.

Furthermore, the present invention is particularly effective when used as a construction method for members placed outdoors.
Of course, the present invention can also be applied to members placed indoors. As mentioned above, a known construction method for members placed indoors is to use ordinary cloth as the exterior material, but when cloth is used as the exterior material, foreign objects can pass through the cloth and enter the inside of the insulation material. There are problems that can easily be penetrated. In particular, in the engine rooms of ships, etc., insulation is installed on the steam pipes to prevent the temperature inside the engine room from rising due to the heat of the steam in the steam pipes, and in this case, cloth is used as the exterior material. Since the cloth is impregnated with oil, there is a problem that the oil can easily catch fire and cause a fire on the ship, but if insulation is applied according to the present invention, such problems will not occur.

Furthermore, the present invention is not applicable only to the above-mentioned pipe, but is generally applicable to other piping members such as a flange cover that covers a flange at the end of a pipe, or a valve box that accommodates a valve. It is possible.

Although other examples are omitted, the present invention can be implemented with various modifications based on the knowledge of those skilled in the art as long as it does not depart from the spirit thereof.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams for explaining an example of a conventional insulation construction method, respectively, and FIGS. 3 and 4 are main parts showing a state in which a pipe is insulated according to the present invention. FIG. 2 is a perspective view and a sectional view of a main part. FIG. 5 is a perspective view showing a specific example of the exterior material used in the present invention, and FIGS. 6 and 7 are perspective views showing a state in which insulation construction is being performed using the exterior material. It is. FIG. 8 is a perspective view showing another form of the exterior material used in the present invention, and FIG. 9 is an explanatory diagram for explaining a method of covering a heat insulating material with the exterior material. FIG. 10 is a perspective view showing still another form of the heat insulating material and sheathing material used in the present invention, and FIGS. 11 and 12 show a method of covering a pipe with the heat insulating material and sheathing material. It is an explanatory diagram for explaining. FIG. 13 is a perspective view showing another form of the heat insulating material and exterior material used in the present invention. 20: Pipe 22: Insulating material 24. 30, 32, 36, 387 Exterior material Figure 1 Figure 3 Figure 5, Figure 9

Claims (1)

[Claims] In addition to covering piping members that should be insulated from the outside atmosphere with a heat insulating material, a reinforcing layer made of a thin layer of a large number of fibrous substances and a porous resin film having a large number of micropores are directly connected to each other. Alternatively, a method for insulating a piping member, comprising covering the heat insulating material with an elastic, moisture-permeable and waterproof exterior material which is indirectly overlapped and previously formed in the form of a sheet or tape.