JPS63257627A - Manufacture of heat insulating double tube - Google Patents
Manufacture of heat insulating double tubeInfo
- Publication number
- JPS63257627A JPS63257627A JP62094193A JP9419387A JPS63257627A JP S63257627 A JPS63257627 A JP S63257627A JP 62094193 A JP62094193 A JP 62094193A JP 9419387 A JP9419387 A JP 9419387A JP S63257627 A JPS63257627 A JP S63257627A
- Authority
- JP
- Japan
- Prior art keywords
- inner tube
- tube
- band
- outer tube
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000004088 foaming agent Substances 0.000 claims abstract description 15
- 238000003780 insertion Methods 0.000 claims abstract description 14
- 230000037431 insertion Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 3
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000000463 material Substances 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000011550 stock solution Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 206010051602 Laziness Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、間怠の内管と外管との間に断熱剤を充填した
各種用途の断熱二重管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a heat-insulating double pipe for various uses in which a heat insulating agent is filled between a hollow inner pipe and an outer pipe.
従来、断熱二重管を製造するに、第４図に示すように、
外管（１）内に内管（２）を同芯状に配置した状態で内
外管間に断熱用発泡剤を注入したり、あるいは、第５図
に示すように予め外周面に断熱剤（７）を被覆した内管
（２）を外管（１）内に同芯状に配置して、被覆断熱剤
（７）と外管（１）との間に断熱用発泡剤を注入したり
していた。Conventionally, in manufacturing insulated double pipes, as shown in Fig. 4,
With the inner tube (2) arranged concentrically within the outer tube (1), a heat insulating foaming agent may be injected between the inner and outer tubes, or as shown in Figure 5, a heat insulating agent ( The inner pipe (2) coated with Was.
しかし、上述のいずれの方法にあっても、製造工程が、
外管内に内管を挿入して同芯状に保持する工程と、その
同芯状保持状態で断熱用発泡剤を注入する工程とに分か
れるために製造能率が低い問題があり、更に断熱用発泡
剤を注入する上で、又、内管を外管内で同芯状に保持す
るのに管の両端夫々から内管保持を行う上で、１回に製
造できる管の長さが制限されることが製造能率を一層低
下させる要因となっていた。However, in any of the above methods, the manufacturing process is
There is a problem with low manufacturing efficiency because the process is divided into the process of inserting the inner tube into the outer tube and holding it concentrically, and the process of injecting the foaming agent for insulation while maintaining the concentricity. In order to inject the agent and to hold the inner tube concentrically within the outer tube, the inner tube is held from both ends of the tube, which limits the length of the tube that can be manufactured at one time. This was a factor that further reduced manufacturing efficiency.
そこで、外管に対して内管を同芯状に保持しながら挿入
するようにすると共に、その挿入に並行して内管に、断
熱用発泡剤を付着させた帯状体を螺旋状に巻付けること
で製造工程の筒略化を図ることも考えたが、挿入にあた
って内管を外管と精度良く同芯状に保持するには外管の
奥側端部から支持具を挿入してその支持具により内管の
挿入先端部を保持しなければならず、ところが支持具の
挿入長さが機器構成上どうしても限られるために、やは
り、１回に製造できる管の長さが制限されてしまう問題
が残った。Therefore, the inner tube is inserted while being held concentrically with the outer tube, and in parallel with the insertion, a band-shaped body coated with a heat-insulating foaming agent is wrapped spirally around the inner tube. We thought of simplifying the manufacturing process, but in order to hold the inner tube concentrically with the outer tube with high accuracy during insertion, we needed to insert a support from the inner end of the outer tube and support it. The insertion tip of the inner tube must be held by a tool, but the insertion length of the support tool is inevitably limited due to the equipment configuration, which again limits the length of the tube that can be manufactured at one time. remained.
本発明の目的は、内管保持を合理的に行うことにより、
製造工程の簡略化を図ると共に、１回に製造できる管長
さを内外管の間怠度を高く維持しながら長くできるよう
にする点にある。The purpose of the present invention is to maintain the inner tube in a rational manner.
The purpose is to simplify the manufacturing process and to increase the length of the tube that can be manufactured at one time while maintaining high laziness between the inner and outer tubes.
本発明による断熱二重管の製造方法の特徴構成は、外管
に対する内管の挿入に並行して前記内管に、断熱用発泡
剤を付着させた帯状体、及び、前記外管の内周面との接
触により前記内管を前記外管に対して同芯状に保持する
バンドを夫々、螺旋状に巻付けることにあり、その作用
・効果は次の通りである。The characteristic structure of the method for manufacturing a heat-insulating double pipe according to the present invention is that, in parallel with the insertion of the inner pipe into the outer pipe, a band-shaped body to which a foaming agent for heat insulation is attached is attached to the inner pipe, and the inner periphery of the outer pipe. The band that holds the inner tube concentrically with respect to the outer tube by contact with a surface is wound spirally, and its functions and effects are as follows.
〔作 用〕
つまり、内管の挿入に並行して、断熱用発泡剤を付着さ
せた帯状体を内管に巻付けることにより、従来、内管の
挿入・保持工程と断熱用発泡剤の注入工程とに分かれて
いた製造工程を単一化できる。又、外管の内面に対する
接触により内管を外管に対し同芯状に保持するバンドを
帯状体とともに内管の挿入に並行して内管に巻付けるこ
とにより、その巻付けたバンドをもって内管の挿入過程
中において内管を外管に対し精度良く同芯状に保持でき
る。[Function] In other words, in parallel with the insertion of the inner tube, by wrapping a band to which the insulation foaming agent is attached around the inner tube, the process of inserting and holding the inner tube and the injection of the insulation foaming agent can be completed. The manufacturing process, which was previously divided into two processes, can be unified. In addition, by wrapping a band that holds the inner tube concentrically with the outer tube through contact with the inner surface of the outer tube together with a band-shaped body around the inner tube in parallel with the insertion of the inner tube, the wrapped band can be used to hold the inner tube concentrically with respect to the outer tube. During the tube insertion process, the inner tube can be held concentrically with the outer tube with high precision.
そして、それら帯状体及びバンドを巻付けながら内管を
挿入するから、従前の如（断熱用の発泡剤の注入のため
や内管保持のために１回に製造できる管の長さが制限さ
れてしまうといったことも回避できる。Since the inner tube is inserted while wrapping these strips and bands, the length of the tube that can be manufactured at one time is limited due to the injection of foaming agent for insulation and to hold the inner tube. You can also avoid this situation.
その結果、製造工程が簡略になると共に、１回に製造で
きる管長が内外管の間怠度を高く維持しながらも従前に
比して大巾に長くなり、全体として、断熱用二重管の製
造能率を大巾に向上し得て、ひいては、製造コストをも
低減し得るに至った。As a result, the manufacturing process has been simplified, and the length of pipe that can be manufactured at one time has become much longer than before, while maintaining a high degree of laziness between the inner and outer pipes. Manufacturing efficiency can be greatly improved, and manufacturing costs can also be reduced.
次に本発明の実施例を図面に基づいて説明する。 Next, embodiments of the present invention will be described based on the drawings.
第１図に示すように、適宜保持装置により外管（１）を
固定し、そして、その外管（１）に対して内管（２）を
、回転送りローラ（３）により外管（１）と同芯状に支
持し、かつ、回転させながら挿入する。As shown in FIG. 1, the outer tube (1) is fixed by an appropriate holding device, and the inner tube (2) is moved to the outer tube (1) by rotating feed rollers (3). ) and insert it while rotating it.
又、その内管（２）の回転させながらの挿入に並行して
、紙製帯状体（４）及び内管保持用バンド（５）を管軸
（Ｐ）に対し所定の傾斜角度を有する方向から連続的に
送って内管（２）外周面に螺旋状に巻付ける。In addition, in parallel with the rotating insertion of the inner tube (2), the paper band (4) and the inner tube holding band (5) are inserted in a direction having a predetermined inclination angle with respect to the tube axis (P). The material is continuously fed from the inner tube (2) and wound spirally around the outer circumferential surface of the inner tube (2).
紙製帯状体（４）の送り過程においては、発泡剤散布ノ
ズル（６）からの吹付けにより断熱用発泡剤としてのウ
レタン原液を紙製帯状体（４）に付着させる。 。In the process of feeding the paper strip (4), the urethane stock solution as a heat insulating foaming agent is applied to the paper strip (4) by spraying from the foaming agent spraying nozzle (6). .
内管保持用バンド（５）は、ウレタン原液を付着させた
紙製帯状体（４）とともに内管（２）の外周面に巻付け
られて、外管（１）に挿入された状態において外管（１
）の内面との接触により内管（２）を外管（１）に対し
同芯状に保持する厚みを有するものである。The inner tube holding band (5) is wrapped around the outer circumferential surface of the inner tube (2) together with a paper band (4) coated with urethane stock solution, and when inserted into the outer tube (1), the inner tube retaining band (5) is Pipe (1
) has a thickness that holds the inner tube (2) concentrically with respect to the outer tube (1) by contact with the inner surface of the outer tube (1).
外管（１）に対する内管（２）の挿入長さが所定の長さ
に至った時点で内管（２）の挿入部分を未挿入部分から
切離し、そして、巻付はバンド（５）により内外管（１
） 、 （２）が間怠に保持された切離し二重管を別途
加熱工程で加熱することにより、巻付紙製帯状体（４）
に付着させであるウレタン原液を発泡固化させ、もって
、内管（２）と外管（１）との間に断熱材層として発泡
ウレタン層（７）を形成した第２図に示す如き構成の断
熱二重管とする。When the insertion length of the inner tube (2) into the outer tube (1) reaches a predetermined length, the inserted portion of the inner tube (2) is separated from the uninserted portion, and the wrapping is done using a band (5). Inner and outer tubes (1
), by heating the separated double tube in which (2) is lazily held in a separate heating process, the wrapped paper strip (4) is heated.
The structure as shown in Fig. 2 is made by foaming and solidifying the urethane stock solution that is attached to the tube, thereby forming a foamed urethane layer (7) as a heat insulating layer between the inner tube (2) and the outer tube (1). Use insulated double pipes.
次に本発明の別実施例を説明する。 Next, another embodiment of the present invention will be described.
（イ） 内管（２）に巻付ける帯状体（４）の材質は
紙に限定されるものでは無く、布や合成樹脂製の不織布
の如きもの等、種々の材質のものを適用できる。(a) The material of the band-shaped body (4) to be wrapped around the inner tube (2) is not limited to paper, and various materials such as cloth or non-woven fabric made of synthetic resin can be used.
（ロ） 帯状体（４）に付着させる断熱用発泡剤もウ
レタン原液に限定されるものではなく、断熱材として使
用できる種々の発泡剤を適用でき・ る。(b) The heat insulating foaming agent to be attached to the strip (4) is not limited to the urethane stock solution, and various foaming agents that can be used as heat insulating materials can be used.
（ハ） 内管保持用バンド（５）としてはポリウレタン
発泡成形材等、種々の材質のものを適用できるが、内管
保持作用と併せて断熱作用を持つものが好適である。又
、バンド（５）の断面形状も四角形や円形、楕円形等に
種々変更可能である。(c) The inner tube holding band (5) can be made of various materials such as polyurethane foam molded material, but it is preferable to use a band that has a heat insulating function as well as an inner tube holding function. Further, the cross-sectional shape of the band (5) can also be changed into a rectangular shape, a circular shape, an elliptical shape, etc.
（ニ） 発泡材付着帯状体（４）及び内管保持用バン
ド（５）の巻付けにあたっては、隙間無く巻付けた帯状
体（４）の上に保持用バンド（５）を巻付けるに代えて
、帯状体（４）の螺旋状巻付けを帯状体（４）間に隙間
のある状態にしてその隙間部分で保持用バンド（５）を
内管（２）に直接に巻付けるようにしても良い。(d) When wrapping the foam material attached band (4) and the inner tube holding band (5), instead of wrapping the holding band (5) on top of the band (4) wrapped without any gaps. Then, the band-shaped body (4) is wound spirally so that there is a gap between the band-shaped bodies (4), and the holding band (5) is directly wrapped around the inner tube (2) in the gap. Also good.
（＊） 内管（２）を、第３図に示すように継手具（
８）及び接着テープ（９）等により接続して継足しなが
ら外管（１）に挿入するようにしても良い。(*) Connect the inner pipe (2) with the fitting (
8) and adhesive tape (9), etc., and may be inserted into the outer tube (1) while being connected.
（へ） 断熱用発泡剤の発泡のための加熱を管を切離
さずに行っても良い。(F) Heating for foaming the heat-insulating foaming agent may be performed without separating the pipe.
（ト） 内管（２）及び外管（１）夫々は、鋼管、銅
管、樹脂管等々、どのような材質の管であっても良い。(G) Each of the inner tube (2) and the outer tube (1) may be made of any material, such as a steel tube, a copper tube, a resin tube, or the like.
本発明方法により製造する断熱用二重管の具体的用途は
不問である。The specific use of the heat-insulating double pipe produced by the method of the present invention is not limited.
尚、実用新案登録請求の範囲の項に図面との対照を便利
にする為に符号を記すが、該記入により本考案は添付図
面の構造に限定されるものではない。Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.
第１図及び第２図は本発明の実施例を示し、第１図は製
造形態を示す一部破断図、第２図は製造二重管の断面図
である。第３図は本発明の別実施例を示す内管の断面図
である。第４図及び第５図は夫々従来例を示す図である
。
（１）・・・・・・外管、（２）・・・・・・内管、（
４）・・・・・・帯状体、（５）・・・・・・バンド。1 and 2 show an embodiment of the present invention, FIG. 1 is a partially cutaway view showing a manufacturing form, and FIG. 2 is a sectional view of a manufactured double pipe. FIG. 3 is a sectional view of an inner tube showing another embodiment of the present invention. FIGS. 4 and 5 are diagrams showing conventional examples, respectively. (1)...Outer tube, (2)...Inner tube, (
4)...band-shaped body, (5)...band.
Claims (1)
管（２）に、断熱用発泡剤を付着させた帯状体（４）、
及び、前記外管（１）の内周面との接触により前記内管
（２）を前記外管（１）に対して同芯状に保持するバン
ド（５）を、夫々、螺旋状に巻付ける断熱二重管の製造
方法。In parallel with the insertion of the inner tube (2) into the outer tube (1), a band-shaped body (4) with a heat-insulating foaming agent attached to the inner tube (2);
and a band (5) that holds the inner tube (2) concentrically with respect to the outer tube (1) by contact with the inner circumferential surface of the outer tube (1), respectively, is spirally wound. A method for manufacturing insulated double pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62094193A JPS63257627A (en) | 1987-04-16 | 1987-04-16 | Manufacture of heat insulating double tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62094193A JPS63257627A (en) | 1987-04-16 | 1987-04-16 | Manufacture of heat insulating double tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63257627A true JPS63257627A (en) | 1988-10-25 |
Family
ID=14103462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62094193A Pending JPS63257627A (en) | 1987-04-16 | 1987-04-16 | Manufacture of heat insulating double tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63257627A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011117613A (en) * | 2011-03-17 | 2011-06-16 | Mirai Ind Co Ltd | Connection structure of double pipe for joint |
| JP2011226621A (en) * | 2010-04-22 | 2011-11-10 | Sumitomo Electric Ind Ltd | Insulated tube and superconductive cable |
| CN102825783A (en) * | 2012-08-28 | 2012-12-19 | 陆忠跃 | Production process for fire hoses with linings |
-
1987
- 1987-04-16 JP JP62094193A patent/JPS63257627A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011226621A (en) * | 2010-04-22 | 2011-11-10 | Sumitomo Electric Ind Ltd | Insulated tube and superconductive cable |
| JP2011117613A (en) * | 2011-03-17 | 2011-06-16 | Mirai Ind Co Ltd | Connection structure of double pipe for joint |
| CN102825783A (en) * | 2012-08-28 | 2012-12-19 | 陆忠跃 | Production process for fire hoses with linings |
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