JP2001289392A - Heat insulating tube and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating tube and its manufacturing method enabling continuous manufacture of the heat insulating tube without being affected by the configuration of a tube body, while intending to reduce and stabilize the weight and improving the workability. SOLUTION: A heat insulating material 13 formed of alumina fibers is layered between partition plates 12a, 12b fixed on the outer periphery face of the tube body 11 in spaced relation, with its surface coated with a packing material 14 formed of an aluminum foil or a stainless foil. The outer periphery face of the packing material 14 is provided integrally with a shell cylinder 16 which is formed by applying a phenolic thermosetting resin material to a cylindrical body to be impregnated therewith, braided by filament members including glass filaments and resin filaments having heat resistance, and then hardening it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated tube and a method for manufacturing the same, and more particularly, to a light-weight tube which can be continuously molded, and which can be manufactured in a complicatedly deformed form. The present invention relates to a heat insulating pipe that can be manufactured and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, the structure of a heat insulating pipe attached to a bleed duct of an aircraft or the like used in a high temperature region near 400.degree. The partition plates 2a and 2b are fixed at predetermined intervals to the portion where the heat insulating material is to be applied.
A heat insulating material 3 made of alumina fiber or the like is attached to the outer peripheral surface of the tube main body 1 between a and 2b.

[0003] Thereafter, a backing material 4 made of aluminum foil or stainless steel foil or the like is provided on the outer peripheral surface of the heat insulating material 3.
And a prepreg sheet 5 of a predetermined size obtained by coating and impregnating a fiber sheet with a resin material on the surface is wound and laminated at least two or more times, and the resin is heated and cured to form a prepreg sheet 5 having a shell structure. Thus, the heat insulating material 3 is held.

[0004]

However, in the conventional structure as described above, the prepreg sheet 5 has at least two sheets.
Since it is a structure of winding and laminating more than one layer, air bleeding work or the like is required, and a wrap portion (overlapping portion) of the prepreg sheet 5 is present. In particular, two layers are required to maintain the strength of the wrap portion. Since the above-described lamination is required, the weight increases, and in order to follow the shape of the tube main body 1, irregularities occur after curing, so that it is necessary to correct it by potting work.

As described above, in the conventional structure, there is a problem that the weight is increased, and further, there is a problem in terms of processing restrictions and weight variation.

SUMMARY OF THE INVENTION It is an object of the present invention to dispose and maintain a heat insulating material without being affected by the shape of the tube main body and to manufacture the heat insulating material continuously, and to reduce the weight and stabilize the weight. It is another object of the present invention to provide a heat insulating pipe capable of further improving the processing operation and a method for manufacturing the same.

[0007]

According to the present invention, in order to achieve the above object, the heat insulating tube of the present invention is provided by laminating a heat insulating layer between partition plates fixed on the outer peripheral surface of a tube body at a predetermined interval. At the same time, the outer shell of the backing material is provided so as to cover it with a backing material, and the outer surface of the backing material is integrally provided with an outer shell tube formed by applying and impregnating a resin to a cylindrical body braided with a thread-like member. The gist is that

Further, according to the method of manufacturing a heat insulating tube of the present invention, a partition plate is fixed to a portion of a tube body where a heat insulating material is to be provided at a predetermined interval so as to face each other, and an outer peripheral surface of the tube main body between the partition plates. After covering the outer peripheral surface of the heat insulating material with the backing material, the outer peripheral surface of the backing material between the partition plates is braided with a thread-like member along the shape of the tube body. The gist of the present invention is to apply and impregnate a resin material to the cylindrical body and to cure it.

According to the present invention, a heat insulating material is laminated on the outer peripheral surface of the tube body between the partition plates, and the outer peripheral surface of the heat insulating material is coated with a backing material.
The outer peripheral surface of the backing material between the partition plates is braided by a thread-like member along the form of the tube body, and the tubular body is cured by coating and impregnating a resin material with the resin material. Without being affected, the heat insulating material can be arranged and held, and can be manufactured continuously. In addition, the weight can be reduced and stabilized, and the workability can be improved.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a straight heat insulating tube according to a first embodiment of the present invention. The structure of the heat insulating tube 10 is manufactured based on the manufacturing steps shown in FIGS. is there.

That is, the heat insulating pipe 10 is fixed by welding or the like to the part L where the heat insulating material is to be provided on the outer peripheral surface of the metal tube main body 11 at predetermined intervals with the partition plates 12a and 12b facing each other.

A heat insulating material 13 made of alumina fiber or the like is wound or laminated on the outer peripheral surface 11a of the tube body 11 between the partition plates 12a and 12b to a predetermined thickness (the height of the partition plates 12a and 12b). Corresponding to the above). Then, the backing material 1 made of aluminum foil, stainless steel foil, or the like is provided on the outer peripheral surface of the heat insulating material 13.
4, and the wrap portion of the backing material 14 is fixed to an aluminum tape or the like to form a heat insulating layer.

Thereafter, the tube main body 11 constructed as described above is set on a braiding machine (not shown), and the surface of the backing material 14 of the tube main body 11 is provided with a glass thread or a heat-resistant material along the shape of the tube main body 11. The tubular body 15 is braided with a thread-like member such as a resin thread. Thereafter, the outer shell tube 16 is integrally formed by applying and impregnating a phenol-based thermosetting resin material, and placing it in an oven or the like and heat-hardening it at about 150 ° C.

By manufacturing the heat insulating tube 10 by the above method, the heat insulating material 13 can be disposed and held without being affected by the shape of the tube main body 11 and can be manufactured continuously. In addition, it is possible to reduce the weight and stabilize the weight, and to further improve the processing operation.

FIGS. 6 and 7 show a second embodiment of the present invention for manufacturing a three-dimensionally deformed heat insulating tube 10a. In this embodiment, a metal tube body 11 is provided near both ends. The partition plates 12a and 12b are fixed to each other by welding or the like so as to face each other, and a heat insulating material made of alumina fiber or the like is provided on the outer peripheral surface 11a of the tube body 11 between the partition plates 12a and 12b, as in the first embodiment. The material 13 is wound or laminated and attached with a predetermined thickness. afterwards,
An outer peripheral surface of the heat insulating material 13 is covered and fixed with a backing material 14 made of aluminum foil, stainless steel foil, or the like.

Thereafter, the tube body 11 is set on a braiding machine (not shown), and the backing material 1 of the tube body 11 is set.
4 is braided into the tubular body 15 with a thread member such as glass thread along the shape of the tube main body 11 from one arrow direction X, and then impregnated with a phenolic thermosetting resin material. Is placed in an oven or the like and is heated and cured at about 150 ° C., whereby the outer shell tube 16 is integrally formed.

As described above, in the embodiment of the present invention,
After covering and fixing the backing material 14 on the outer peripheral surface of the heat insulating material 13, the tube main body 11 is set on a braiding machine (not shown) and braided into the tubular body 15 with a thread-like member such as a glass thread. (A two-dimensional and three-dimensionally deformed form and a form in which the tube diameter changes), and at the same time, a heat insulating material 13 capable of withstanding high temperatures.
Can be maintained, and a structure excellent in insulation from the outside and heat insulation properties can be obtained.

In the heat insulating tube of the present invention, the tube body 11 may be made of a metal material, a resin material, or the like, and the thread member may be made of glass fiber, carbon fiber, resin fiber, or the like, depending on the use (for example, temperature). Furthermore, a heat insulating tube can be arbitrarily designed by arbitrarily selecting and using a phenol-based, epoxy-based, urethane-based, or the like as an impregnating curable material.

[0020]

According to the present invention, a heat insulating layer is laminated between partition plates fixed on the outer peripheral surface of the tube body at a predetermined interval as described above, and the surface is covered with a backing material. The outer shell of this backing material is integrally provided with an outer shell cylinder that is made by applying and impregnating a resin into a cylindrical body braided with a thread-like member, and then hardening, so that the following excellent effects are obtained. To play. (a) Since a tubular body braided with a thread-like member is formed on the outer peripheral surface of the heat insulating layer, unlike the conventional structure in which a plurality of prepreg sheets are wound, there is no sheet wrap portion and a single-layer structure. The structure can be made satisfactory in strength by molding
The weight of the heat insulating pipe can be reduced. (b). There is no irregularity on the duct surface after molding, and the air bleeding operation can be omitted. As a result, much labor and time are not required for the repairing and processing operations, and the work efficiency can be significantly improved. (c) Since it is possible to cope with a complicated form of the duct, the molding operation is facilitated, the surface condition can be improved, and the weight can be further stabilized. (d). Continuous molding can be performed and productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a straight heat insulating pipe showing a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a first manufacturing process of the heat insulating pipe.

FIG. 3 is an explanatory view showing a second manufacturing process of the heat insulating pipe.

FIG. 4 is an explanatory view showing a third manufacturing step of the heat insulating pipe.

FIG. 5 is an enlarged sectional view taken along the line AA of FIG. 4;

FIG. 6 is a sectional view of a three-dimensionally formed heat insulating tube according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a three-dimensionally formed heat insulating tube according to a second embodiment of the present invention.

FIG. 8 is a sectional view of a conventional heat insulating tube.

[Explanation of symbols]

 10, 10a Insulated tube 11 Metal tube body 12a, 12b Partition plate 13 Insulating material 14 Backing material 15 Tubular body 16 Outer shell tube

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H036 AA01 AB03 AB13 AB18 AB24 AC06 AD09 AE01 3H111 AA01 BA03 CB23 DA11 DA15 DB11 DB20 EA17 4F100 AA19 AB01 AB04C AB10C AB33C AG00D AK01D AK33 AS00C AT00A DA11 EB12 DG06 EJ822 GB31 GB51 JB13D JJ02B JK01 JK15 JL02 JL03

Claims (5)

[Claims] 1. A heat insulating layer is provided by being laminated between partition plates fixed at a predetermined interval on an outer peripheral surface of a tube main body, and provided so as to cover a backing material on the surface thereof.
A heat insulating tube in which a resin is applied to and impregnated in a tubular body braided with a thread-like member on the outer peripheral surface of the backing material, and then a cured outer shell tube is integrally provided. 2. The heat insulating pipe according to claim 1, wherein the heat insulating layer is formed by laminating a material having a heat insulating property to a predetermined thickness. 3. The heat insulating tube according to claim 1, wherein the backing material is an aluminum foil or a stainless steel foil. 4. The outer shell cylinder is a cylindrical body conforming to the shape of a tube main body made of braided glass fiber, and is cured by applying and impregnating a thermosetting resin to the cylindrical body. 4. The heat insulating pipe according to 2 or 3. 5. A partition plate is fixed to a portion of a tube body to which a heat insulating material is to be provided at a predetermined interval so as to face each other, and a heat insulating material is laminated and disposed on the outer peripheral surface of the tube body between the partition plates. After coating the outer peripheral surface of the heat insulating material with a backing material, the outer peripheral surface of the backing material between the partition plates is braided with a thread-like member along the shape of the tube main body,
A method for manufacturing a heat-insulating pipe in which a resin material is applied to and impregnated in the cylindrical body and cured.