JPH07301392A - Heat insulating material, pipe with the same and execution method of the same - Google Patents

Abstract

PURPOSE:To provide an easy execution method capable of performing even in a narrow space and displaying high heat insulating and sound insulating properties by filling a heat insulating space with a heat insulating material having the volume changed by a gas amount contained therein and reducing the volume of the heat insulating space by reducing the gas amount contained in the heat insulating material. CONSTITUTION:Two aluminum evaporated polyester films 1 welded to each other on the end edges with the aluminum layers being placed inside to provide the inside as a heat insulating space 4. The heat insulating space 4 is filled with floss silk 2 as a heat insulating material which contains gas therein to be reduced by evacuation so that the volume of the gas is reduced. After this sheet-like heat insulating material is inserted and disposed in a gap between walls 3 of a building, a hole is provided in the film 1. When the atmosphere is admitted into the heat insulating space 4 filled with the floss silk 2, the space 4 is enlarged and expanded to fill the gap between the walls 3 of the building and give the heat insulating and sound insulating properties.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating material which is easy to apply, a pipe with the heat insulating material, and a method of applying the same.

[0002]

2. Description of the Related Art Conventionally, heat-insulating pipes for transporting water or steam have been constructed by installing pipes at predetermined locations and then wrapping the pipes with a heat insulating material to keep them warm. In advance, a pipe with a heat insulating material manufactured by integrally molding a heat insulating material made of a synthetic resin foam or the like around the outer circumference of the pipe in a factory or the like has been used. Materials having low thermal conductivity such as expanded polystyrene and expanded polyethylene have generally been used for these heat insulating materials. Further, recently, a method of arranging a fiber mat such as a glass fiber mat in the ceiling or in the wall has been adopted for a building in order to improve heat retention and soundproofing in the building.

[0003]

However, in the former method, there is a problem that it takes too much time and labor because the bulky heat insulating material is attached to the pipe which has already been constructed. Further, in the latter method, the heat insulating material-equipped pipe has a problem that handling is poor and piping work is difficult because the outer diameter of the pipe is considerably large. In particular, when bending piping is used, the second moment of area of the heat-insulating material-equipped pipe becomes larger than that when only the inner pipe is used, and there is a problem that it is difficult to bend. Also,
Modern buildings tend to make the underfloor and above-ceiling spaces as narrow as possible in order to secure a large living space. Therefore, in some cases, when the conventional method is used, the outside diameter of the heat insulating material pipe becomes larger than the piping space (for example, the height under the floor), and it is not possible to install the heat insulating material of the required thickness or piping becomes impossible. There is also. Also, the heat retention in the building,
The method of arranging a glass fiber mat or the like for enhancing soundproofing is very bulky, and thus the work of arranging and constructing it at a predetermined place is troublesome. It is an object of the present invention to provide a heat insulating material, a heat insulating material-equipped pipe, and a construction method thereof, which can be easily installed and can be installed even in a narrow space and exhibit a high degree of heat insulating property and soundproofing property.

[0004]

That is, the heat insulating material according to the first aspect of the present invention is a heat insulating material having a closed heat insulating space formed by a film layer, the heat insulating material having a volume that changes depending on the amount of gas contained therein. Is filled in the heat insulation space,
In addition, the volume of the heat insulating space can be reduced by reducing the amount of gas contained in the heat insulating material.

Further, a pipe with a heat insulating material according to a second aspect of the invention is
A closed adiabatic space formed by a film layer is formed on the outer circumference of the inner tube, and the adiabatic space whose volume changes depending on the amount of gas contained is filled in the adiabatic space, and the amount of gas contained in the adiabatic material is adjusted. By reducing the volume, the volume of the heat insulating space can be reduced.

According to a third aspect of the present invention, there is provided a heat insulating material and a pipe with a heat insulating material, wherein the heat insulating material or the pipe with a heat insulating material according to claim 1 or 2 is placed in a predetermined place in a state where the volume of the heat insulating space is reduced. And then injecting a gas into the heat insulating space formed by the film layer of the heat insulating material to expand the heat insulating space.

As the inner pipe of the heat insulating material pipe of the present invention, a pipe made of synthetic resin such as polybutene or polyethylene, a composite pipe of synthetic resin and metal, a pipe made of metal, etc. are used.
The size, shape, etc. are not limited at all. As the film, a film having a low air permeability mainly composed of a synthetic resin or a natural resin is used, and a material having a large elongation such as butyl rubber, polyester or nylon is preferable. Further, as the film having low air permeability, a metal foil such as aluminum foil, a laminated film in which a metal foil such as aluminum foil is attached to a plastic film, or a metal vapor deposition obtained by vapor-depositing metal such as aluminum vapor deposition on the plastic film Film etc. can be used.
It is preferable to use these in combination for the heat radiation function and protection of the inner tube. If a metal laminated synthetic resin film such as aluminum vapor deposition or aluminum foil sticking is used as the film, it is possible to give a heat radiation effect to the outer surface of the heat insulating material,
It can have a sufficient heat insulating effect. In addition, the metal laminate synthetic resin film also serves as a barrier layer that prevents gas from flowing in and out between the formed heat insulating space and the outside air, so that the thickness of the heat insulating space can be reduced. Furthermore, if the laminated film is formed by attaching a metal foil such as aluminum foil to the film layer material, the heat insulation performance is further improved, and there is no risk of damaging the inner tube even if it is dragged under the floor when piping. It can also be expected to prevent trauma. The thickness of this low breathable film is
Although it depends on the material of the film, it is preferably about 0.001 to 2 mm, but is not particularly limited. As a heat insulating material whose volume changes depending on the amount of gas contained, one that reduces its volume when it is put in a bag and the inside of the bag is depressurized,
Specifically, cotton or the like made of animal substance fiber, vegetable fiber, synthetic fiber or the like is preferable.

The heat insulating material and the tube with the heat insulating material of the present invention can be manufactured, for example, by the following method. That is, in the case of a sheet-shaped heat insulating material, on the first film,
A sheet of synthetic resin fiber or other cotton that has been formed into a felt shape and the second film are continuously stacked, and the edges of the first film and the edges of the second film are heat-sealed to each other. It is manufactured as a bag with a built-in cotton sheet. The manufactured sheet-like bag can be manufactured by reducing the volume of the heat insulating space formed by the film layers by drawing a vacuum between the film layers.

In the case of a pipe-shaped heat insulating material, an inner film is extruded on a mandrel by an extruder, and a cotton sheet made of synthetic resin fiber or the like is formed on the outer periphery thereof in a felt shape. Films are continuously stacked, the outer film is formed into a cylindrical body by heat fusion or the like while being formed into a cylindrical shape, and then the mandrel is pulled out to manufacture. In the case of a tube with heat insulating material, for example,
A manufacturing line as shown in FIG. 6 can be produced and continuously manufactured. That is, on the outer periphery of the inner tube made of synthetic resin by an extruder, a sheet of cotton made of synthetic resin fiber or the like is preliminarily formed into a felt-like shape and an outer film are continuously stacked, and while forming this into a cylindrical shape, heat is applied. Continuous production is performed by forming the outer film into a cylindrical body by fusing or the like. The above steps may be performed after the inner film is coextruded on the inner tube. A heat insulating space formed by the outer film when the inner tube and the outer film at one end of the tube with the heat insulating material thus produced are sealed with a power band or the like between the inner film and the outer film and the other end is evacuated. The volume is reduced, and the tube with heat insulating material of the present invention can be obtained.

The vacuum pressure applied to reduce the volume of the heat insulating space formed by the film layer filled with the heat insulating material should be such that the volume of the heat insulating material filled in the heat insulating space decreases. About -10 to -50 cmHg is sufficient. As the heat-insulating material filled in the heat-insulating space formed by the film layer, use the one made of felt made of synthetic resin fiber or the like, which is compressed in advance to reduce its volume. Therefore, the subsequent evacuation step may be omitted. Further, the sealing of the film at the end of the pipe-shaped heat insulating material or the tube with the heat insulating material is not particularly limited as long as the gas injected into the heat insulating space formed by the film can be prevented from leaking to the outside. Such means include, for example, using a terminal jig, pressing the film with a simple ring, or heat-sealing.

[0011]

The heat insulating material according to claim 1 is arranged such that the heat insulating space is reduced in volume and placed in a predetermined place, and then gas is introduced into the heat insulating space formed by the first film and the second film. Only by expanding the volume of the heat insulating material, a heat insulating material having a predetermined heat insulating performance can be obtained. Also in the pipe with a heat insulating material according to the second aspect, it is possible to obtain a pipe with a heat insulating material having a predetermined heat insulating performance by merely introducing gas into the heat insulating space. According to the construction method of claim 3, the heat insulating material or the pipe with the heat insulating material of the present invention is arranged at a predetermined place in a state where the volume of the heat insulating space is reduced, or after direct pipe construction, or at a predetermined place. After drawing in the installed sheath tube and piping,
Since the heat insulating space can be made to have a predetermined heat insulating performance only by inserting a gas into the heat insulating space formed by the film layer, the heat insulating material can be arranged or the pipe with the heat insulating material can be installed in a short time. In addition, at the time of renewal of the one inserted and arranged in the sheath tube, it is possible to easily renew the tube with the heat insulating material by reducing the volume of the heat insulating space expanded by the gas to reduce the diameter and pulling out.

When the heat insulating material and the heat insulating space formed by the film layer of the heat insulating material pipe are kept in a reduced pressure state lower than the atmospheric pressure, the heat insulating space is simply changed from the reduced pressure state to the atmospheric pressure state. Just by doing so, it is possible to obtain a product having a predetermined heat insulation performance. Further, the heat insulating effect of the formed heat insulating material is exerted by suppressing the movement of heat by the heat insulating material such as the dynamic substance fibers in the heat insulating space formed by the film layer provided on the outer circumference of the inner tube. If a gas with low thermal conductivity is injected into the heat insulating space, the movement of heat is also suppressed by this gas, so that a better heat retaining effect is exhibited. Furthermore, in the long-term use of the heat insulating material and the heat insulating material-equipped pipe of the present invention, when the gas injected into the heat insulating space formed by the film layer leaks to the outside and the performance is deteriorated, the gas should be pressed into the heat insulating space again. Thus, it is possible to easily provide sufficient heat insulation performance.

[0013]

EXAMPLE A heat insulating material, a tube with a heat insulating material, and a method of constructing the same according to the present invention will be described below with reference to the drawings. (Example 1) Fig. 1a is a cross-sectional view of a sheet-shaped heat insulating material as an example of the heat insulating material of the present invention. Heat-sealed at the edges. The inside is a heat insulating space 4. This insulating space 4 is filled with cotton 2 as a heat insulating material. This heat insulating material is in a state in which the gas contained therein is reduced by vacuuming and the volume thereof is reduced. This sheet heat insulating material is shown in Fig. 1b.
After inserting and arranging in the gap between the walls 3 of the building as shown in
When a hole is opened in the film 1 and the atmosphere is injected into the heat insulating space 4 filled with the cotton wool 2, the space 4 expands and expands to fill the gap between the walls 3 of the building as shown in FIG. Provides heat insulation and soundproofing.

(Embodiment 2) FIG. 2 is an explanatory view of an embodiment of the heat insulating material pipe of the present invention, in which (a) is a partial longitudinal sectional view,
(B) is a cross-sectional view taken along the line AA of (a). The heat insulating material pipe C is provided on the outer periphery of the inner pipe 20 made of cross-linked polyethylene,
First, a cylindrical low-permeability inner film layer 30 is provided, a heat insulating material 50 is arranged on the outside thereof, and an outer film layer 40 is formed on the outside thereof. The film layers 30 and 40 are made of aluminum vapor-deposited polyester film having low air permeability. The cross-linked polyethylene inner tube 20 has an outer diameter of 27 mm, a wall thickness of 3.2 mm, and film layers 30 and 40.
Has a wall thickness of 0.003 mm. Insulation material 50 is 1m pipe
About 50 g of cotton wool is packed in a vacuum-compressed state. A terminal jig 70 as shown in FIG. 3 is attached to the end of the pipe C with the heat insulating material. This terminal jig 70
Is composed of a main body 90 having a gas injection hole 60 shown in FIG. 4 and a ring 80 shown in FIG. This ring 80
Is for sealing the tubular film covered on the body 90 of the terminal jig.

(Embodiment 3) A method for constructing a pipe with a heat insulating material according to the present invention will be described. Prior to the formation of the pipeline, first, the ring 80 shown in FIG. 5 and the terminal jig main body 90 shown in FIG. 4 are externally attached to both ends of the heat insulating material-equipped pipe C of the second embodiment. The pipe C with the heat insulating material in this state was laid in a predetermined pipe path. The heat-insulating material-equipped pipe C used was finer than the conventional product for the same purpose, and its handling and piping work such as bending piping were easy. After the pipe C with the heat insulating material is laid in a predetermined place, the tip of the terminal jig main body 90 preliminarily inserted on both ends of the pipe C with the heat insulating material is laid as shown in FIG. The tube C with material was inserted between the tubular film layers 30 and 40. Then, the ring 80 is attached to the terminal jig body 90.
The film layers 30 and 40 at both ends of the tube C with the heat insulating material were moved upward and sealed to form the heat insulating space 4.
After that, carbon dioxide gas is injected from the gas injection hole 60 of the terminal jig body 90, and the outer diameter of the heat insulating material-equipped pipe C is 50 m.
The adiabatic space 4 formed by the tubular film layers 30 and 40 was expanded and expanded to about m. Then, the gas injection hole 60 was covered with a lid 100 to prevent the injected gas from leaking. Regarding the heat insulation piping formed as described above,
5 ℃ in the inner tube under the condition of outside air temperature 28 ℃ and humidity 80%
When cold water was passed through, no dew formed on the surface of the pipe with heat insulating material.

(Embodiment 4) As shown in FIG. 7, the sheath pipe A was previously supported by the suspension member B at the position where the air-conditioning pipe material was arranged. At this time, the supporting interval by the hanging member B is 50 to 10
It was about 0 cm. In the sheath tube A supported by the suspending member B, two heat insulating material tubes C having the structure shown in Example 2 in which the volume of the heat insulating space 4 is reduced are passed using a lead wire, The terminal was connected to the air conditioner body. At this time, the lead wire and the heat insulating material-equipped tube C were connected to each other by locking the locking tool attached to the tip of the lead wire inside the inner tube 20. After that, carbon dioxide gas is injected through the gas injection hole 60 of the main body 90 of the terminal jig 70 attached to the end of the heat insulating material pipe that is made to run through the line to expand and expand the adiabatic space of the heat insulating material pipe C. Tube C with heat insulating material on the inner surface of sheath tube A
Was fitted to form a heat insulating air conditioning pipeline. With respect to the heat insulating air-conditioning pipeline formed as described above, when the air conditioner was operated under the conditions of the outside air temperature of 28 ° C. and the humidity of 80%, no dew condensation was found on the surface of the heat insulating material pipe C in the sheath A. Did not happen. In addition, at the time of the above-mentioned line piping, as shown in FIG. 8, a funnel-shaped jig D is attached to the end of the sheath pipe A, and the work is easily performed while applying a lubricant to the surface of the heat insulating material pipe C.

[0017]

The heat insulating material according to claim 1 has a predetermined heat insulating property by expanding the heat insulating space by introducing gas into the heat insulating space filled with the heat insulating material after the heat insulating material is arranged and installed at a predetermined place. Can be Also, since it is thin and easy to bend before placement, placement work can be done very easily at any place. According to the heat insulating material pipe of claim 2, the outer diameter at the time of piping is about several mm thicker than the outer diameter of the inner pipe, which is several stages higher than the conventional heat insulating material pipe having the inner pipe of the same thickness. It has a small outer diameter and is easy to handle. Moreover, since the pipe with the heat insulating material has a small sectional moment, bending work can be easily performed without requiring a large force in the piping work. According to the construction method of claim 3, the heat insulating material according to claim 1 or the pipe with the heat insulating material according to claim 2,
Arrange it in a predetermined place with the volume of the insulating space small,
After that, by injecting a gas into the heat insulation space formed by the film layer, the volume can be expanded to form a heat insulation pipe line with high-performance heat insulation and cold insulation performance, so that the heat insulation pipe line can be easily formed. Is.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view of an embodiment of a heat insulating material of the present invention,
(A) is a cross-sectional view of the heat insulating material, (b) is a cross-sectional view for explaining a state in which the heat insulating material is inserted and arranged in the gap of the wall, (c)
FIG. 4 is an explanatory diagram showing a state where gas is injected into the heat insulating space of the heat insulating material to expand and expand the heat insulating space formed by the film layer.

FIG. 2 is a view showing an embodiment of a pipe with a heat insulating material of the present invention,
(A) is a partial sectional view, (b) is a sectional view taken along the line AA of (a).

FIG. 3 is a partial cross-sectional view for explaining how a gas is injected into the heat insulating space formed by the film layer of the heat insulating material pipe of the present invention to expand and expand the heat insulating space.

FIG. 4 is a cross-sectional view showing a body of a terminal jig used for injecting a gas into a heat insulating space formed by a film layer of a tube with a heat insulating material of the present invention.

FIG. 5 is a ring constituting a terminal jig, (a) is a front view and (b) is a side view.

FIG. 6 is an explanatory view of a method for continuously producing a tube with a heat insulating material according to the present invention.

FIG. 7 is an explanatory diagram showing how the heat insulating material pipe of the present invention is piped using a sheath pipe.

[Explanation of symbols]

 1 ... Aluminum vapor-deposited polyester film 2 ... Genuine cotton 3 ... Wall 4 ... Insulation space 20 ... Inner tube 30 ... Film layer 40 ... Film layer 50・ ・ ・ ・ Heat insulation material 60 ・ ・ ・ ・ Gas injection hole 70 ・ ・ ・ ・ ・ ・ Terminal jig 80 ・ ・ ・ ・ Ring 90 ・ ・ ・ ・ Terminal jig body 100 ・ ・ ・ Gas injection hole lid A ・ ・... Sheath tube B ... Sheath tube suspension member C ... Heat insulation material tube D ... Funnel-shaped jig E ... Lubricant

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[Procedure amendment]

[Submission date] August 19, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a sectional explanatory view of an embodiment of a heat insulating material of the present invention,
(A) is a cross-sectional view of the heat insulating material, (b) is a cross-sectional view for explaining a state in which the heat insulating material is inserted and arranged in the gap of the wall, (c)
FIG. 4 is an explanatory diagram showing a state in which gas is injected into the heat insulating space of the heat insulating material to expand and expand the heat insulating space formed by the film layer.

FIG. 2 is a view showing an embodiment of a pipe with a heat insulating material of the present invention,
(A) is a partial sectional view, (b) is a sectional view taken along the line AA of (a).

FIG. 3 is a partial cross-sectional view for explaining how a gas is injected into the heat insulating space formed by the film layer with the heat insulating material of the present invention to expand and expand the heat insulating space.

FIG. 4 is a cross-sectional view showing a body of a terminal jig used for injecting a gas into a heat insulating space formed by a film layer of a tube with a heat insulating material of the present invention.

FIG. 5 is a ring constituting a terminal jig, (a) is a front view and (b) is a side sectional view.

FIG. 6 is an explanatory view of a method for continuously producing a tube with a heat insulating material according to the present invention.

FIG. 7 is an explanatory diagram showing how the heat insulating material pipe of the present invention is piped using a sheath pipe.

FIG. 8 is an explanatory diagram of a method of applying a lubricant to the surface of the heat insulating material pipe of the present invention.

[Explanation of reference symbols] 1 ... ・ Aluminum-deposited polyester film 2 ... ・ Matt cotton 3 ・ ・ ・ ・ Wall 4 ・ ・ ・ ・ Insulating space 20 ・ ・ ・ ・ ・ ・ Inner tube 30 ・ ・ ・ ・ ・ ・ Film layer 40 ・ ・..Film layer 50 .... Insulating material 60 ..... Gas injection hole 70 ..... Terminal jig 80 ..... Ring 90 .... Terminal jig body 100..Gas injection hole portion Lid A ... Sheath pipe B ... Sheath pipe suspension member C ... Heat insulation pipe D ... Funnel-shaped jig E ... Lubricant

Claims (3)

[Claims] 1. A heat insulating material having a closed heat insulating space formed by a film layer, wherein the heat insulating material whose volume changes according to the amount of gas contained therein is filled in the heat insulating material and is contained in the heat insulating material. By reducing the amount of gas,
A heat insulating material, wherein the volume of the heat insulating space can be reduced. 2. A closed heat insulating space formed by a film layer is formed on the outer periphery of the inner tube, and the heat insulating space is filled with a heat insulating material whose volume changes depending on the amount of gas contained therein. By reducing the amount of gas contained,
A pipe with a heat insulating material, wherein the volume of the heat insulating space can be reduced. 3. The heat insulating material or the pipe with a heat insulating material according to claim 1 or 2 is arranged at a predetermined place in a state where the volume of the heat insulating space is reduced, and thereafter formed by a film layer of the heat insulating material. A method for constructing a heat insulating material or a pipe with a heat insulating material, which comprises injecting gas into the heat insulating space to expand the heat insulating space.