JPH10141587A - Flexible tube with heat insulating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit a main duct of an exhaust duct or the like easily to a gas range hood or the like by covering the peripheral surface of a flexible pipe with bendable heat insulating sheets. SOLUTION: This flexible tube 1 with heat insulating material is formed by winding a first heat insulating sheet 3 around the outer periphery of a flexible tube body 2 and further winding a second heat insulating sheet 4 on the sheet 3, and both sheets 3, 4 have a large number of slits 5, 6. A covering process of heat insulating material at a construction site is therefore dispensed with. The flexible tube 1 can be freely bent in adjustment at the construction site, and the heat insulating effect of a heat insulating material layer on the outer diameter side of the curved surface of the flexible tube 1 is not impaired. With the use of this flexible tube 1 for work of an exhaust duct or the like and a gas range hood or the like for a kitchen of an apartment house, construction work can be labor-saving, and a construction period can be shortened by a large margin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible pipe with a heat insulating material which is suitably used for a pipe having a bent portion such as a connection between a duct main pipe and a blowing port or an outlet side.

[0002]

2. Description of the Related Art
For example, when an exhaust duct is attached to a range hood in the construction of an exhaust duct for a kitchen such as a condominium, a pipe at a bent portion is provided by an elbow pipe curved at 45 ° or 90 °. In this case, the length of the elbow pipe is adjusted in advance according to the design drawing. However, in practice, even if the elbow pipe is constructed according to the design drawing, a slight difference may occur between the drawing size and the site size. In many cases, in order to adjust the height direction of the pipe, the length of the elbow pipe is adjusted on site using a short pipe.

[0003] However, if there is a piping process that is tailored to the site as described above, even if the elbow pipe or the short pipe is previously coated with a heat insulating material, when connecting or cutting these elbow pipes or short pipes, the heat insulating material coated with great care is required. It is necessary to perform a step of peeling off or covering the connection portion again, and the significance of previously covering these with a heat insulating material may be reduced. On the other hand, when piping short pipes and elbow pipes not covered with heat insulating material at the site, and then covering them with heat insulating material and performing heat insulation work, use a duct main pipe pre-coated with heat insulating material. Significance diminishes.

In recent years, a flexible pipe made of, for example, a metal pipe formed in a bellows shape so as to be freely bent has been used as a pipe of such a bent portion. When using a flexible hood to attach the exhaust duct to such a range hood, bring the flexible pipe to the site, bend the flexible pipe in accordance with the position of the exhaust duct attachment port of the range hood and the exhaust duct attachment port, and then use insulation. It is necessary to perform insulation work by coating, and as in the case described above, the significance of using a duct main pipe that is previously coated with a heat insulating material is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a heat-insulating flexible material that allows a duct main pipe such as an exhaust duct to be easily attached to a range hood or the like in piping work that requires site adjustment as described above. It is intended to provide a tube.

[0006]

According to the present invention, there is provided a flexible tube with a heat insulating material, wherein the outer peripheral surface of the flexible tube is covered with a bendable heat insulating material sheet. . In this case, it is preferable to use, as the bendable heat insulating material sheet, a heat insulating material sheet in which at least one of a plurality of through slits and non-through slits is inserted, or a heat insulating material sheet in which a tape-shaped heat insulating material is knitted or woven in a sheet shape. .

That is, the present invention provides an outer peripheral surface of a flexible tube.
By covering it with a bendable insulation sheet.
When bending and using a kibble tube by site adjustment,
The insulation sheet covering the flexible pipe is flexible
Since the tube follows the curve of the tube and bends, the flexible tube
Not only is flexibility not compromised, but also
The heat insulating effect of the heat material is not impaired. Therefore,
There is no need to perform the insulation coating process on site,
Things can be simplified. In addition, temporarily
Illustration of pipes traditionally used as insulation for ducts
If the density is 40kg / m^Three The above inorganic fibers,
Insulation sheet used so that the fiber arrangement is vertical
(General name: thermal insulation zone)
Can follow the bending of the flexible tube and bend
The flexibility of the flexible tube
Will be done.

In the case of the present invention, if a heat insulating sheet having a large number of at least one of a through slit and a non-through slit is used as a heat insulating sheet that can be bent, the flexible pipe is bent when used. The cut of the slit of the heat insulating material sheet is widened on the outer diameter side of the curved surface, so that it is possible to appropriately follow the bending of the flexible pipe.

In this case, by laminating two or more layers of heat insulating material and laminating at least two layers of sheets so that the slit directions are different from each other, when the flexible pipe is curved, one of the heat insulating sheets is bent. While following the bending freely, even if the slits of the heat insulating material sheet are widened and the layer or layer of one of the heat insulating material layers becomes thinner, the slit direction of the other heat insulating material sheet is different, Since the heat insulating property of such a portion is secured in the other layer, the entire heat insulating material layer is preferable because it has a sufficient heat insulating effect.

[0010] If a heat-insulating material sheet formed by knitting or weaving a tape-like heat-insulating material into a sheet shape is used as another bendable heat-insulating material sheet, an extensible heat-insulating material sheet is obtained, and the flexible pipe is bent. When used, the heat insulating sheet extends on the outer diameter side of the curved surface of the flexible pipe, so that the flexibility of the flexible pipe is not impaired, and no gap is generated in the heat insulating layer by the heat insulating sheet. It is suitable.

In this case, when the above-described knitted or woven heat insulating material sheet is coated on the flexible pipe so as to be biased, the formed heat insulating material layer has good stretchability, and the followability of the flexible pipe to bending is further improved. It is more preferable because it is excellent.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a flexible pipe with a heat insulating material according to one configuration example of the present invention.
This flexible tube 1 with heat insulating material is obtained by winding a first heat insulating material sheet 3 around the outer peripheral surface of a flexible tube main body 2 and further winding a second heat insulating material sheet 4 on this sheet 3. The sheet 3 and the second heat insulating material sheet 4 have a large number of slits 5 and 6, respectively. In addition, in order to explain the structure of the flexible pipe 1 with a heat insulating material, a part of each of the heat insulating material sheets 3 and 4 is shown in FIG.

As the flexible pipe main body 2, a conventionally used one can be used. For example, a flexible pipe main body formed of a bellows-shaped pipe with a metal foil such as a galvanized foil or a stainless steel foil is used. Specific examples include a steel foil duct, an aluminum foil duct, and a stainless steel foil duct. Here, the thickness of the metal foil forming the flexible pipe main body 2 and the inner diameter of the pipe are not particularly limited, and can be appropriately selected depending on the type of metal, the purpose of use, and the like. The thickness is 0.03 to 0.3 mm, preferably 0.08 to 0.1
Those having a diameter of about 2 mm are preferably used and have an inner diameter of 50 to 10 mm.
Those having a size of about 00 mm are preferably used.

The first and second heat insulating sheets 3 and 4 are used.
Therefore, the material is not particularly limited.
Use the same material that is used as heat insulation for the main duct
Such insulation can be used, for example,
No lath fiber, rock wool, ceramic fiber, etc.
Machine fiber alone or in combination of two or more.
And the resulting non-combustible sheet. Insulation material
The thickness of the sheets 3 and 4 and the density of the fibers are particularly limited.
No, it can be selected as appropriate depending on the type of fiber, purpose of use, etc.
However, in consideration of heat insulation and handling,
Is preferably about 3 to 15 mm, particularly about 4 to 8 mm.
And the density is 40-300kg / m^Three , Especially 80-150
kg / m^Three It is preferable to set the degree.

The heat insulating sheets 3 and 4 are provided with a number of slits 5 and 6 in different directions as shown in FIGS. 2 and 3, respectively. Here, slits 5, 6
Is cut from the outer peripheral surface (front surface side) when the heat insulating sheets 3 and 4 are wound around the flexible pipe main body 2, respectively. In this case, the cut depth is particularly limited. Not insulation sheets 3, 4
May be cut into only the front side to form a non-through slit, or may be cut from the front surface to the back surface of the heat insulating material sheets 3 and 4 to form a through slit. The method of inserting such slits 5 and 6 into the heat insulating material sheets 3 and 4 is not particularly limited. For example, when the slits 5 and 6 are formed as through slits, the principle of producing “Ami of Tanabata decoration” can be applied. The length, interval, and the like of the slit are not particularly limited, and can be appropriately selected in consideration of the purpose of use of the flexible pipe main body 2 to be coated and the followability to the curvature of the flexible pipe main body 2. The length (x in the figure) is preferably about 1 to 40 cm, the interval in the slit direction (y in the figure) is about 2 to 30 cm, and the distance between adjacent slits (z in the figure) is about 2 to 30 cm. It is. The slits 5 and 6 are formed at angles that are different from each other when the heat insulating material sheets 3 and 4 are stacked, and the angle is not particularly limited. When it is wound around 2, it can be inserted along its axial direction, circumferential direction, and oblique direction. Although the directions in one sheet may be different, it is preferable that the slit directions in one sheet are the same in consideration of the operability when slitting and the slit angle when laminating. In this case, the slit direction of the two heat insulating sheets 3 and 4 is the angle (slit angle) formed by the slits 5 and 6 of the two heat insulating sheets 3 and 4 when the heat insulating sheets 3 and 4 are stacked. It is preferable that the angle be in the range of 30 to 150 °.

When covering the flexible pipe main body 2 with the first heat insulating material sheet 3 and further laminating the second heat insulating material sheet 4 on the first heat insulating material sheet 3, a chloroprene rubber-based adhesive is used as an adhesive if necessary. Agents, water glass, cement-based inorganic adhesives, etc.
It is preferable to apply the adhesive in a dotted or linear manner, instead of applying the adhesive to the entire sheet, since each of the heat insulating material sheets 3 and 4 can easily follow the bending of the flexible pipe main body 2. In stacking the heat insulating sheets 3 and 4,
By laminating the heat insulating sheets 3 and 4 in a state where they are not stretched so that the cuts of the slits 5 and 6 of the heat insulating sheets 3 and 4 are not widened, the flexible pipe main body 2 is formed.
The followability of the heat insulating material sheet when bending is improved. When the slits 5 and 6 are non-through slits, the slits 5 and 6 are wound so that the surface on which the slits 5 and 6 are formed is on the outer peripheral surface side.

Here, as the flexible tube with a heat insulating material of the present invention, instead of laminating the heat insulating material sheets of different slit directions as described above, for example, a tube having slits of the same direction is inserted in the same slit direction. However, in this case, by appropriately changing the slit length of each sheet, the slit interval, and the distance between adjacent slits, heat insulation on the outer diameter side of the curved surface when the flexible pipe is bent. Make sure that there are no gaps (parts without thermal insulation) in the material layer. Also, a large number of tape-shaped heat insulating materials are used as the heat insulating material sheets, and these are formed in a ring shape so that they are sequentially adjacent to each other to cover the flexible tube, and then the adjacent positions of the tape-shaped heat insulating materials are not overlapped. It is also possible to laminate a tape-like heat insulating material or tape-like heat insulating materials having different tape widths. However, in consideration of the ability to follow the bending of the flexible pipe, it is desirable to laminate heat insulating sheets in different slit directions as in the above configuration example.

In the case of the flexible tube with a heat insulating material of the present invention, the heat insulating material layer made of the heat insulating material sheet with the slit is not limited to two layers as described above. , 4 may be prepared two by two, and heat insulating sheets 3, 4 in different slit directions may be alternately stacked to form four layers. Moreover, the heat insulating material layer does not need to be formed only by the heat insulating material sheet with a slit, and as long as the effect of the present invention is not impaired, a heat insulating material sheet without a slit can be used in combination. When multiple layers are laminated, a heat insulating sheet having no slit near the outer peripheral surface of the flexible pipe, that is, on the inner layer side, can be used together.

Next, FIG. 4 shows a flexible pipe with a heat insulating material according to another embodiment of the present invention. The flexible pipe with a heat insulating material 1 is provided on the outer peripheral surface of a flexible pipe main body 2 similar to the above. A stretchable heat insulating material sheet 3 'in which a tape-shaped heat insulating material is woven or knitted in a sheet shape is wound. In FIG. 4, a part of the heat insulating material sheet 3 ′ is broken.

In the case of this configuration example, the heat insulating material sheet 3 ′
As described above, the tape-shaped heat insulating material is woven into a sheet shape or
It is knitted. Here, when weaving,
It is not particularly limited, for example, plain weave, sentence weave,
Satin weave and the like. Also, when knitting
In addition, the knitting method is not particularly limited, for example,
Knitting, rubber knitting, etc.
But weave that gives a heat insulating material sheet 3 'with excellent elasticity
One, knitting is desirable. Here, the woven or knitted text
The material of the loop-shaped heat insulating material is the first and second heat insulating materials of the above configuration example.
Sheets similar to sheets 3 and 4 can be suitably used
You. The fiber density, thickness, and tape
The width of the fiber is not particularly limited.
It can be appropriately selected depending on the purpose, etc.
In consideration of the above, the density is 25 to 300 kg / m^Three ,Especially
70-150kg / m^Three Degree of fiber is preferred, thickness
Is 3 to 30 mm, especially about 5 to 20 mm, and the width is 2 to 20
0 mm, particularly preferably about 20 to 100 mm.
You.

In covering the flexible pipe main body 2 with such a heat insulating material sheet 3 ', its elasticity differs depending on the weaving or knitting of the heat insulating material sheet 3'. The heat insulating sheet 3 ′ is biased, that is, when the flexible pipe main body 2 is covered, the weave or stitch of the heat insulating sheet 3 ′ is oblique to the axial direction and the circumferential direction of the flexible pipe main body 2. When used, the heat insulating material sheet 3 ′ is preferable because it easily expands and contracts according to the bending of the flexible pipe main body 2. In particular, when the heat insulating material sheet 3 ′ is woven, it becomes biased. It is desirable to coat in such a manner. When an adhesive is used to cover the heat insulating material sheet 3 ′ with the flexible pipe main body 2, it is the same as the case of the heat insulating material sheets 3 and 4 of the above configuration example, and is wound around the flexible pipe main body 2. At this time, it is preferable not to stretch the heat insulating sheet 3 ′.
It is also possible to use a conventional heat insulating material sheet together with the conventional heat insulating material sheet as long as the effects of the present invention are not impaired.

The flexible tube of the present invention can further cover the outer peripheral surface of the heat insulating material layer formed in the above configuration example as long as the effects of the present invention are not impaired. Aluminum foil composite product, which is a bonded product of non-combustible paper or glass cloth, and used as a skin material or cosmetic material to prevent inorganic fibers from scattering in the air by covering with aluminum foil or wrinkles. You can also.

The flexible tube with a heat insulating material of the present invention is not limited to the above-described structure, and may be variously modified without departing from the gist of the present invention.

Next, the flexible pipe with heat insulating material of the present invention will be described in more detail with reference to examples.

Example 1 Insulation material of inorganic fiber having a thickness of 5 mm
(Fiber: glass fiber needle punch felt, density:
130kg / m^Three ) And prepare two slits
The through slits are oriented vertically or horizontally, respectively.
G (length: 8 cm, interval in the slit direction: 2 cm, adjacent
(Distance between slits: 3 cm). These four
Adhesive (chloro
(Prene-based) is applied partly in the form of dots, and the thickness is 0.05 m.
m, 150φ on steel flexible tube
Was. Then, the second insulation sheet in a different slit direction
And apply an adhesive to the first sheet as described above.
They were overlapped so that the slit angle was 90 °. Then 1
3 sheets with the same slit direction as the 2nd insulation sheet
4 and heat insulation sheets in different slit directions
By stacking these sequentially as described above,
To form a heat insulating material layer having a thickness of 20 mm.
The outer surface of the material layer (outermost layer) is a glass cloth skin with aluminum foil
The material was covered with a stiffener, and
A kibble tube was obtained.

Example 2 Density: 120 kg / m^Three ,thickness
5mm, 20mm wide tape-shaped glass fiber into rubber knitting
Knitted into a sheet-like knitted fabric with a width of 1 m (1,000 mm)
Prepare the four pieces that have been formed and apply adhesive (cl
Loloprene) is applied in a spot-like manner to a thickness of 0.05 m.
m, 150φ sequentially wound around a flexible tube of steel foil
To form a heat insulating material layer, and further outside the heat insulating material layer.
Aluminum foil / glass cloth bonded product as cosmetic material
Flexivive of Example 2 coated with lumi
Got a tube.

Example 3 Density: 120 kg / m^Three ,thickness
5 mm, 50 mm wide tape-like glass fiber and density 12
0kg / m^Three 5mm thick, 100mm wide tape
Each lath fiber is plain woven to a width of 1 m (1,000
mm), each woven into a sheet-like woven cloth
And adhesive to each (chloroprene)
System) in the form of dots and apply a thickness of 0.05 mm, 150
For 50mm width tape on φ steel foil flexible tube
Sheet, 100mm width tape order
And wrap them in order to form a bias
To form a heat insulating material layer, and then to the outer peripheral surface of this heat insulating material layer.
Holds aluminum foil and glass cloth bonded products as cosmetics
The flexible tube of Example 3 was obtained by coating in the state of being laid.
Was.

When the flexible pipes with heat insulating materials of Examples 1 to 3 were respectively used for installation work of an exhaust duct for a kitchen and a range hood of an apartment, all the flexible pipes with heat insulating materials were freely bent at the site. In addition, the heat insulating effect was not lost due to the gap between the heat insulating layers on the outer diameter side of the curved surface of the flexible tube.

[0029]

According to the flexible pipe with heat insulating material of the present invention, the flexible pipe can be coated with the heat insulating material in advance, so that there is no need to perform the step of coating the heat insulating material on site, and the heat insulating material can be used. Since the sheet follows the bending of the flexible tube and bends, the flexible tube can be freely bent at the site, and the heat insulating effect of the heat insulating material layer on the outer diameter side of the curved surface of the flexible tube is not impaired. Therefore, if the flexible pipe with the heat insulating material of the present invention is used for, for example, the installation work of an exhaust duct for a kitchen of an apartment and a range hood, an elbow pipe is not required for connecting the range hood portion and the exhaust duct, and the drawing dimensions Even if there is a deviation between the size and the site dimensions, the flexible pipe with heat insulation can be freely bent at the site, and the heat insulation coating process after piping is not required, and labor for construction work is reduced. Thus, the piping work can be easily performed, and the construction period can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a flexible pipe with a heat insulating material, illustrating a configuration example of a flexible pipe with a heat insulating material of the present invention.

FIG. 2 is a diagram showing a first example of a flexible pipe with a heat insulating material.
It is a top view of a heat insulating material sheet.

FIG. 3 shows a second pipe used for the flexible pipe with the heat insulating material.
It is a top view of a heat insulating material sheet.

FIG. 4 is a schematic perspective view of a flexible tube with a heat insulating material, illustrating another configuration example of the flexible tube with a heat insulating material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible pipe with heat insulating material 2 Flexible pipe main body 3,4,3 'Heat insulating material sheet 5,6 Slit

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Eiko Takizawa 1-2-17 Higashi-Shimbashi, Minato-ku, Tokyo Inside Fujimori Industry Co., Ltd. (72) Inventor Atsushi Nakamuta 1-2-1-2 Higashi-Shimbashi, Minato-ku, Tokyo No. 17 Inside Fujimori Sangyo Co., Ltd.

Claims (5)

[Claims] 1. A flexible tube with a heat insulating material, wherein the outer peripheral surface of the flexible tube is covered with a bendable heat insulating material sheet. 2. The flexible tube with a heat insulating material according to claim 1, wherein the heat insulating material sheet is a heat insulating material sheet having a large number of at least one of a through slit and a non-through slit. 3. The flexible pipe with heat insulating material according to claim 2, wherein two or more heat insulating material sheets are stacked and at least two of the sheets are stacked so that the slit directions are different from each other. 4. The flexible tube with a heat insulating material according to claim 1, wherein the heat insulating material is a heat insulating material sheet formed by knitting or weaving a tape-shaped heat insulating material into a sheet shape. 5. The flexible tube with a heat insulating material according to claim 4, wherein the heat insulating material sheet is coated so as to be biased.