JPS6345030A - Manufacture of heat insulation cylinder - Google Patents
Manufacture of heat insulation cylinderInfo
- Publication number
- JPS6345030A JPS6345030A JP61188879A JP18887986A JPS6345030A JP S6345030 A JPS6345030 A JP S6345030A JP 61188879 A JP61188879 A JP 61188879A JP 18887986 A JP18887986 A JP 18887986A JP S6345030 A JPS6345030 A JP S6345030A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- cylindrical heat
- heat insulation
- insulation material
- insulating material
- 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 description 8
- 238000009413 insulation Methods 0.000 title abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 20
- 239000012774 insulation material Substances 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 239000011810 insulating material Substances 0.000 claims description 67
- 238000003780 insertion Methods 0.000 abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 7
- 239000000470 constituent Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、筒状断熱材の外周に保護管を被装してなる断
熱筒の製造方法に関し、特に比較的簡単な操作・手順で
芯ずれのない断熱筒を製造する方法に関するものである
。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a method for manufacturing a heat insulating tube in which the outer periphery of a cylindrical heat insulating material is covered with a protective tube. The present invention relates to a method of manufacturing a heat insulating cylinder without shifting.
［従来の技術］
地中埋設管や屋内・外の露出配管等として使用される低
温もしくは高温流体の輸送配管は、保温、保冷の目的で
管外周に厚肉の帯状もしくはマット状の断熱材（グラス
ウール、ロックウール、発泡プラスチックス等）を巻装
し、更にその外周にアルミニウム等の金属箔や合成樹脂
等からなる保護テープを螺旋状に巻回して断熱材層の固
定と保護を図るのが通例である。ところがこの様な断熱
施工は断熱材の巻装と保護材の壱肺を別々に行なわなけ
ればならないため作業が煩雑で手数と時間を要し、しか
もこの様な断熱施工法ではともすれば巻回された断熱材
同士の間に隙間ができて保冷・保温効果が低下したり、
あるいは保護テープ等による締付は力が不均一になって
長手方向の断熱効果が不均一になるといった問題を生じ
ていた。[Prior Art] Pipes for transporting low-temperature or high-temperature fluids, which are used as underground pipes or exposed indoor/outdoor pipes, are coated with a thick band-like or mat-like insulating material ( (glass wool, rock wool, foamed plastics, etc.) and then spirally wrap a protective tape made of metal foil such as aluminum or synthetic resin around the outer circumference to fix and protect the insulation layer. It is customary. However, in this type of insulation construction, the wrapping of the insulation material and the wrapping of the protective material must be performed separately, making the work complicated, laborious, and time-consuming. Gaps may form between the insulation materials, reducing the cold and heat retention effect.
Alternatively, when tightening with a protective tape or the like, the force becomes uneven, resulting in a problem that the heat insulation effect in the longitudinal direction becomes uneven.
この様な問題を解消する為の手段としてたとえば特公昭
５５−５４１１号公報、特開昭５５−９５５３９号公報
及び実公昭５５−３７８２３号公報に開示されている様
な技術が提案されている。即ち上記公報に開示された技
術は、断熱性管状体の外周に外層管が一体的に被装成形
された断熱筒を提供するものであり、断熱配管の施工性
や断熱特性等については従来技術で指摘されていた前述
の様な問題点を解消することができる。As a means for solving such problems, techniques such as those disclosed in Japanese Patent Publication No. 55-5411, Japanese Unexamined Patent Publication No. 55-95539, and Japanese Utility Model Publication No. 37823-1982 have been proposed. That is, the technology disclosed in the above publication provides a heat insulating cylinder in which an outer layer pipe is integrally molded around the outer periphery of a heat insulating tubular body, and the workability and heat insulation properties of the heat insulating piping are different from the conventional technology. It is possible to solve the problems mentioned above.
［発明が解決しようとする問題点〕
ところが上記公報に記載された断熱筒は、いずれも発泡
プラスチックスを断熱層としその外周に熱可塑性樹脂よ
りなる保護被膜を形成してなるものであり、耐熱性や強
度のうえで必ずしも満足し得るものではなく、しかもこ
れらの断熱筒は２瓜押出成形法あるいはこれに準する方
法によって製造しなければならないため、製造設備が複
雑で高価であり、更には加工条件のアンバランス等によ
っては断熱性管状体と外層管が芯ずれを起こし、断熱層
の周方向肉厚が片寄って断熱特性が低下するといった問
題を生じることがある。[Problems to be Solved by the Invention] However, the heat insulating tubes described in the above publications all have a heat insulating layer made of foamed plastic and a protective coating made of thermoplastic resin formed around the outer periphery of the heat insulating tube. In addition, these heat insulating tubes must be manufactured using the two-melon extrusion method or a similar method, making the manufacturing equipment complex and expensive. Due to unbalanced processing conditions, etc., the heat insulating tubular body and the outer layer tube may become misaligned, causing problems such as the thickness of the heat insulating layer in the circumferential direction being uneven and the heat insulating properties being degraded.
本発明は上記の様な事情に着目してなされたものであり
、その目的は断熱材や外層管構成素材の種類等に一切制
約を受けることなく、しかも優れた強度と断熱特性を有
し且つ芯ずれのない断熱筒を容易に製造することのでき
る方法を提供しようとするものである。The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a material that has excellent strength and heat insulation properties without being subject to any restrictions on the type of heat insulating material or outer layer pipe constituent material, etc. The object of the present invention is to provide a method for easily manufacturing a heat insulating cylinder without misalignment.
〔問題点を解決するための手段］
本発明に係る方法の構成は、圧縮変形可能な筒状断熱材
の外周に保護管を被装してなる断熱筒を製造する方法で
あって、筒状断熱材と保護管の寸法を下記［Ｉ］式の関
係を満たす様に予め成形しておき、該筒状断熱材を半径
方向に圧縮して下記［ＩＩ ］式の関係を満たす様に該
筒状断熱材の外径を縮径させてから前記保護管内へ挿入
し、次いで上記圧縮を解除するところに要旨を有するも
のである。[Means for Solving the Problems] The method according to the present invention is a method for manufacturing a heat insulating tube in which the outer periphery of a compressible and deformable cylindrical heat insulating material is covered with a protective tube. The dimensions of the heat insulating material and the protective tube are formed in advance so that they satisfy the relationship of formula [I] below, and the cylindrical heat insulating material is compressed in the radial direction to form the cylinder so that the relationship of formula [II] below is satisfied. The gist is that the outer diameter of the shaped heat insulating material is reduced, the material is inserted into the protective tube, and then the compression is released.
筒状断熱材外径≧保護管内径・・・［ＩＦ圧縮後の筒状
断熱材外径く保護管内径・・・［ＩＩ ：１［作用］
本発明の具体的な構成は後記実施例で詳述するが、その
構成及び作用の概要は次の通りである。Outer diameter of cylindrical heat insulating material ≧ Inner diameter of protection tube... [Outer diameter of cylindrical heat insulating material after IF compression - Inner diameter of protection tube... [II: 1 [Function] The specific structure of the present invention will be described in Examples below. Although detailed description will be given, the outline of its structure and operation is as follows.
即ち本発明では圧縮変形可能な筒状断熱材と、該筒状断
熱材の外周に被装される保護管を予め成形しておき、こ
れらを一体に組付けて断熱筒とするものであるが、これ
ら組付は素材の成形に当たっては、前記［Ｉ］、［Ｉ１
１式に示した様に筒状断熱材の外径（ａＯ）と保護管の
内径（Ｄ）がｄｏ≧Ｄの関係を満たす様に寸法調整して
おく。That is, in the present invention, a cylindrical heat insulating material that can be compressed and deformed and a protective tube covered around the outer periphery of the cylindrical heat insulating material are formed in advance, and these are assembled together to form a heat insulating tube. , These assemblies are performed in accordance with the above [I] and [I1] when forming the material.
As shown in equation 1, the dimensions are adjusted so that the outer diameter (aO) of the cylindrical heat insulating material and the inner diameter (D) of the protective tube satisfy the relationship do≧D.
そして該筒状断熱材を半径方向に圧縮して圧縮後の外径
（ｄｌ）がｄｌ ＜Ｄとなる様に縮径させてから、該筒
状断熱材を前記保護管内へ挿入し、次いで上記圧縮を解
除する。そうすると筒状断熱材は復元力によって圧縮前
の外径（ｄｏ ）に復元しようとするが、保護管の内径
（Ｄ）は筒状断熱材の外径（ｄｏ）以下の寸法とされて
いるので、筒状断熱材は保護管により外周面側から抱き
締められた状態となり、両者が一体となって芯ずれのな
い優れた品買の断熱筒を得ることができる。Then, the cylindrical heat insulating material is compressed in the radial direction to reduce the outer diameter (dl) after compression so that dl < D, and then the cylindrical heat insulating material is inserted into the protective tube, and then the above-mentioned Uncompress. In this case, the cylindrical heat insulating material will try to return to its outer diameter (do) before compression due to the restoring force, but since the inner diameter (D) of the protection tube is smaller than the outer diameter (do) of the cylindrical heat insulating material, The cylindrical heat insulating material is hugged from the outer circumferential side by the protective tube, and the two are integrated to provide an excellent quality heat insulating tube without misalignment.
以下実施例図面に沿って本発明の構成及び作用効果を詳
細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration and effects of the present invention will be explained in detail below with reference to the drawings.
［実施例］
第１図は本発明の実施例を示す工程説明図であり、まず
第１図（Ａ）に示す如く筒状断熱材１と外層管２を準備
す４る。このとき、筒状断熱材１の外径ｄ０は外層管２
の内径りよりも大きくしておく。次いで第１図（Ｂ）に
示す如く筒状断熱材１に非通気性フィルムよりなる袋３
をかぶせ、該袋３の開口部を吸引バイブ４の先端に気密
的に固定し、吸引バイブ４によって袋３内を吸引して内
部を負圧とする。そうすると、図示する如く外気圧によ
り筒状断熱材１は袋３と一体になって半径方向に縮径す
る。従って第１図（Ｃ）に示す如く、吸引バイブ４によ
る減圧度を調整して縮径後の外径ｄ、を外層管２の内径
り未満とした後、筒状断熱材１を袋３と一体に外層管２
内へ挿入すれば、挿入作業を抵抗なくスムーズに行なう
ことができる。挿入完了後吸引パイプ４を外して袋３を
外気に開放すると、袋３内は外気圧と等しくなり、筒状
断熱材１の外周方向にかかる圧縮力は解除されるから、
第１図（Ｄ）に示す如く筒状断熱材１は元の外径ｄ０に
復帰しようとするが、前述の如く外層管２の内径りはｄ
０以下に形成されているので、筒状断熱材１は袋３を挟
み込んだ状態で外層管２の内周面に密着し一体化する。[Example] FIG. 1 is a process explanatory diagram showing an example of the present invention. First, a cylindrical heat insulating material 1 and an outer layer pipe 2 are prepared as shown in FIG. 1(A). At this time, the outer diameter d0 of the cylindrical heat insulating material 1 is the outer diameter of the outer layer pipe 2.
Make it larger than the inner diameter of. Next, as shown in FIG. 1(B), a bag 3 made of a non-breathable film is attached to the cylindrical heat insulating material 1.
The opening of the bag 3 is hermetically fixed to the tip of the suction vibrator 4, and the inside of the bag 3 is suctioned by the suction vibrator 4 to create a negative pressure inside. Then, as shown in the figure, the diameter of the cylindrical heat insulating material 1 is reduced in the radial direction together with the bag 3 due to the external pressure. Therefore, as shown in FIG. 1(C), after adjusting the degree of pressure reduction by the suction vibrator 4 to make the outer diameter d after diameter reduction less than the inner diameter of the outer layer tube 2, the cylindrical heat insulating material 1 is attached to the bag 3. Outer layer pipe 2 in one piece
Once inserted inside, the insertion process can be performed smoothly without any resistance. After the insertion is completed, when the suction pipe 4 is removed and the bag 3 is opened to the outside air, the inside of the bag 3 becomes equal to the outside air pressure, and the compressive force applied to the outer circumferential direction of the cylindrical heat insulating material 1 is released.
As shown in FIG. 1(D), the cylindrical heat insulating material 1 tries to return to its original outer diameter d0, but as mentioned above, the inner diameter of the outer layer pipe 2 is d0.
0 or less, the cylindrical heat insulating material 1 comes into close contact with the inner circumferential surface of the outer layer tube 2 and is integrated with the bag 3 sandwiched therebetween.
その後第１図（Ｄ）の太矢印で示す如く袋３の両端部を
切除すれば、目的とする断熱筒を得ることができる。Thereafter, by cutting off both ends of the bag 3 as shown by the thick arrows in FIG. 1(D), the desired heat insulating cylinder can be obtained.
上記の工程からも明らかな様に筒状断熱材１は、最終的
に外層管２の内周面に密着するが、外層管２の内周面へ
の圧接力を残した状態で外層管２内面に密着し得るもの
がより好ましく、そのためにはｄ０≧Ｄ（より好ましく
はｄｏ〉Ｄ）の関係を満足する様にしておかねばならな
い。As is clear from the above process, the cylindrical heat insulating material 1 finally comes into close contact with the inner circumferential surface of the outer layer tube 2, but the outer layer tube 2 remains in contact with the inner circumferential surface of the outer layer tube 2. It is more preferable to use a material that can adhere closely to the inner surface, and for this purpose, the relationship d0≧D (more preferably do>D) must be satisfied.
即ちｄｏ＜Ｄである場合は、筒状断熱材１と外層管２の
間に隙間ができて両者を一体化させることができない。That is, when do<D, a gap is created between the cylindrical heat insulating material 1 and the outer layer tube 2, and the two cannot be integrated.
一方ｄ０≧Ｄであるときは筒状断熱材１を外層管２内へ
挿入するときの抵抗が大きいため、圧縮変形が可能で軟
弱な筒状断熱材１の挿入は極めて困難であるが、筒状断
熱材１を縮径させて挿入するという本発明方法を採用す
れば、元々の寸法関係がｄ０≧Ｄである場合でも挿入作
業をスムーズに行なうことができる。On the other hand, when d0≧D, the resistance when inserting the cylindrical heat insulating material 1 into the outer layer pipe 2 is large, so it is extremely difficult to insert the cylindrical heat insulating material 1, which is soft and capable of compression deformation. By employing the method of the present invention in which the shaped heat insulating material 1 is inserted after being reduced in diameter, the insertion work can be carried out smoothly even when the original dimensional relationship is d0≧D.
上記の様に本発明では筒状断熱材１の圧縮・縮径と圧縮
解除時の復元・拡径を有効に活用するところに最大の特
徴を有するものであって、筒状断熱材１の素材としては
圧縮変形可能な弾性を有するものを使用する必要があり
、素材の具体例としてはポリエチレンフオーム、ビニル
フオーム、ウレタンフオーム、ラバーフオーム等の発泡
プラスチックス（独立気泡及び連続気泡の何れも可）及
びロックウール、グラスウール等の無機質繊維等が挙げ
られる。また外層管２としては、使用目的に応じて鋼管
、鋼管、ステンレス管等の金属管やプラスチック管、Ｆ
ＲＰ管等を任意に選択して使用することができる。As mentioned above, the greatest feature of the present invention is that the compression and diameter reduction of the cylindrical heat insulating material 1 and the restoration and diameter expansion upon decompression are effectively utilized. It is necessary to use a material that has elasticity that can be compressed and deformed. Specific examples of materials include foamed plastics such as polyethylene foam, vinyl foam, urethane foam, and rubber foam (both closed cell and open cell are acceptable). and inorganic fibers such as rock wool and glass wool. In addition, the outer layer tube 2 may be a metal tube such as a steel tube, a steel tube, or a stainless steel tube, or a plastic tube, depending on the purpose of use.
An RP pipe or the like can be arbitrarily selected and used.
上記２種の構成素材は、基本的には筒状断熱材１の外周
面と外層管２内周面との密接によって一体性が確保され
るが、必要によっては接合面に合成ゴム系あるいはエポ
キシ系等の接着剤、ゴム系、アクリル系共重合物等から
なる粘着剤あるいはホットメルト系接着剤等を介在させ
て一体性を一段と高めることもできる。尚第１図（Ａ）
〜（Ｄ）に示した如く筒状断熱材１の縮径に非通気性フ
ィルムからなる袋３を使用する場合、該袋３の素材とし
てホットメルト型の接着性フィルムを使用し、最終段階
で加熱融着させることも有効である。Basically, the integrity of the two types of constituent materials mentioned above is ensured by the close contact between the outer circumferential surface of the cylindrical heat insulating material 1 and the inner circumferential surface of the outer layer tube 2, but if necessary, synthetic rubber or epoxy may be used on the joint surface. It is also possible to further enhance the integrity by interposing an adhesive such as a rubber-based adhesive, an adhesive made of a rubber-based copolymer, an acrylic copolymer, or a hot-melt adhesive. Furthermore, Figure 1 (A)
When using a bag 3 made of a non-breathable film to reduce the diameter of the cylindrical heat insulating material 1 as shown in ~(D), a hot-melt adhesive film is used as the material for the bag 3, and in the final stage Heat fusing is also effective.
第２図（Ａ）〜（Ｃ）は本発明の他の実施例を示す工程
説明図であり、吸引バイブ４として長尺のものを用いて
筒状断熱材１の長手方向に貫通せしめ、吸引による筒状
断熱材１の縮径と該筒状断熱材１の支持（たわみ防止）
を同時に行ない得る様に構成した他は第１図（Ａ）〜（
Ｄ）に示した工程と同様に実施されるものであり、この
方法であれば、縮径された筒状断熱材１を直線状に保つ
ことができるので、外層管２内への挿通作業を一層円滑
に行なうことができる。尚吸引バイブ４は挿通一体化後
第２図（Ｃ）に示す如く筒状断熱材１内から抜き出せば
よい。FIGS. 2(A) to 2(C) are process explanatory diagrams showing another embodiment of the present invention, in which a long suction vibrator 4 is used to penetrate the cylindrical heat insulating material 1 in the longitudinal direction, and Reducing the diameter of the cylindrical heat insulating material 1 and supporting the cylindrical heat insulating material 1 (preventing deflection)
Figure 1 (A) - (
This method is carried out in the same manner as the step shown in D). With this method, the diameter-reduced cylindrical heat insulating material 1 can be kept in a straight line, so the work of inserting it into the outer layer pipe 2 is simplified. This can be done even more smoothly. After the suction vibrator 4 is inserted and integrated, it can be pulled out from the inside of the cylindrical heat insulating material 1 as shown in FIG. 2(C).
第１．２図の例では筒状断熱材１を縮径させるのに非通
気性フィルムからなる袋を使用したが、これに代えて筒
状断熱材１の外周面及び端面に非通気性のスキン層を形
成して外気の流入を防止し、吸引バイブ４による減圧縮
径を行なうことも勿論可能である。In the example shown in Figure 1.2, a bag made of non-breathable film was used to reduce the diameter of the cylindrical heat insulating material 1, but instead of this, a bag made of non-breathable film was used on the outer peripheral surface and end surface of the cylindrical heat insulating material 1. Of course, it is also possible to form a skin layer to prevent the inflow of outside air and perform diameter reduction using the suction vibrator 4.
第３図（Ａ）〜（Ｄ）は本発明の更に他の実施例を示す
工程説明図であり、フリーピストン５の内蔵された管状
加工装置６を用いる例を示している。そして第３図（Ａ
）に示す如く非通気性フィルム類の袋３内に封入された
筒状断熱材１と外層管２を装置６内に装入し、まずＸ方
向から圧縮空気等を吹き込んで装置６内を昇圧する。そ
うすると袋３内に封入された筒状断熱材１は袋３と共に
半径方向に縮径する「第３図（Ｂ）］。従って該筒状断
熱材１の外径が多層管２の内径未満に保たれる様に圧縮
空気を吹き込みながら、フリーピストン５を第３図（Ｃ
）のＦ方向へ動かして筒状断熱材１を図面左方へ９勤さ
せると、筒状断熱材１を外層管２内へスムーズに挿入す
ることができる。そして挿入完了後装置６内を放圧して
常圧に戻すと、第３図（Ｄ）に示す如く筒状断熱材１は
復元・拡径して外層管２の内周面に密着するゆその後こ
の一体化物を装置６から取出し、両端に露出した袋３構
成フィルムを切除すれば、目的とする断熱筒を得ること
ができる。FIGS. 3(A) to 3(D) are process explanatory diagrams showing still another embodiment of the present invention, and show an example in which a tubular processing device 6 having a built-in free piston 5 is used. And Figure 3 (A
), the cylindrical heat insulating material 1 and the outer layer tube 2 sealed in a bag 3 made of non-breathable film are placed into the device 6, and compressed air or the like is first blown from the X direction to increase the pressure inside the device 6. do. Then, the diameter of the cylindrical heat insulating material 1 enclosed in the bag 3 is reduced in the radial direction together with the bag 3 (Fig. 3 (B)). While blowing compressed air to keep the free piston 5 in place, move it as shown in Figure 3 (C
) When the cylindrical heat insulating material 1 is moved in the direction F of 9 to the left in the drawing, the cylindrical heat insulating material 1 can be smoothly inserted into the outer layer pipe 2. After the insertion is completed, the pressure inside the device 6 is released to return to normal pressure, and the cylindrical heat insulating material 1 restores its shape and expands in diameter as shown in FIG. 3(D). By taking out this integrated product from the device 6 and cutting off the film constituting the bag 3 exposed at both ends, the desired heat insulating cylinder can be obtained.
尚上記の例では何れも筒状断熱材１として完全筒状のも
のを用いる方法を説明したが、上記の方法を変形すれば
、たとえば第４図（Ａ）、（Ｂ）（何れも一部破断側面
図）に示す如く螺旋筒状の断熱材１を用いたりあるいは
任意の空隙７を有する筒状断熱材１を用いることもでき
る。更に必要によっては筒状断熱材１や外層管２の断面
形状を卵形、楕円形、多角形等とすることにより任意の
断面形状の断熱筒を得ることができる。In each of the above examples, a completely cylindrical material is used as the cylindrical heat insulating material 1. However, if the above method is modified, for example, FIGS. 4(A) and 4(B) (both partially It is also possible to use a spiral cylindrical heat insulating material 1 as shown in the cutaway side view) or a cylindrical heat insulating material 1 having arbitrary voids 7. Furthermore, if necessary, the cross-sectional shape of the cylindrical heat insulating material 1 and the outer layer tube 2 may be oval, elliptical, polygonal, etc., thereby making it possible to obtain a heat insulating tube with any cross-sectional shape.
第５．６図は、加圧又は減圧による筒状断熱材構成部材
の変形量を調べた結果を例示するグラフであり、第５図
は筒状断熱材として独立気泡型の発泡ポリエチレンを用
い、第３図に示す方法に準じて加圧した場合における空
気圧と管内厚さの関係を示している。第５図からも明ら
かな様に、独立気泡型の発泡ポリエチレンの場合は、約
１．２にｇｆ／ｃｍ’の圧力を加えるだけで筒状断熱材
の肉厚を７０％にまで減することができ、それに伴う拡
径により外層管への挿入を容易に行ない得ることが分か
る。尚該発泡ポリエチレンの場合、筒状断熱材は加圧解
除（放圧）と殆ど同時に元の形状に復元する。また第６
図は、筒状断熱材構成部材としてロックウール及びグラ
スウールを用い、第２図の方法に準じて減圧処理した場
合における真空度と管肉厚さの関係を示したものであり
、両者共５６０〜６６０ ｍｍ）Ｉｇの真空度を与える
ことによって筒状断熱材の管肉は６５〜８０％程度に減
じ、それに伴う拡径により外層管への挿入は非常に容易
となる。また放圧後は３０〜６０秒程度で元の寸法に復
帰することを確認している。但し本発明で採用される加
圧若しくは減圧の程度は、筒状断熱材の材質や圧縮代等
によって任意に設定すべきものであり、本発明の技術的
範囲に制限を加える性格のものではない。Figure 5.6 is a graph illustrating the results of examining the amount of deformation of a cylindrical heat insulating material component due to pressurization or depressurization. It shows the relationship between air pressure and pipe inner thickness when pressurized according to the method shown in FIG. 3. As is clear from Figure 5, in the case of closed-cell polyethylene foam, the wall thickness of the cylindrical insulation material can be reduced to 70% by simply applying a pressure of approximately 1.2 gf/cm'. It can be seen that the accompanying diameter expansion allows for easy insertion into the outer layer tube. In the case of the polyethylene foam, the cylindrical heat insulating material returns to its original shape almost simultaneously with release of pressure. Also the 6th
The figure shows the relationship between the degree of vacuum and the tube wall thickness when rock wool and glass wool are used as the cylindrical heat insulating material components and are subjected to vacuum treatment according to the method shown in Figure 2. By applying a degree of vacuum of 660 mm) Ig, the tube wall thickness of the cylindrical heat insulating material is reduced to about 65 to 80%, and the accompanying diameter expansion makes insertion into the outer layer pipe very easy. Furthermore, it has been confirmed that the original dimensions are restored in about 30 to 60 seconds after the pressure is released. However, the degree of pressurization or depressurization employed in the present invention should be arbitrarily set depending on the material of the cylindrical heat insulating material, the amount of compression, etc., and is not intended to limit the technical scope of the present invention.
本発明によって得られる断熱筒を用いた断熱配管施工法
は一切制限されないが、直線状配管の場合はたとえば第
７図に示す如く断熱筒Ａ、、Ａ。The method of constructing heat insulating piping using the heat insulating tube obtained by the present invention is not limited at all, but in the case of straight piping, for example, the heat insulating tubes A, , A as shown in FIG. 7 are used.
を適当な長さに切断して接続すべき配管材Ｂ１゜Ｂ２の
外周に挿通し、配管材Ｂ、、Ｂ、の接続管継手Ｃの外周
には適当な断熱材りを充填した後、その外周面を適当な
保護材Ｅで被包すればよく、また湾曲配管の場合は、た
とえば第８図に示す如く配管材Ｂ、、Ｂ２の対峙する開
口端を適当な曲率及び湾曲角度のエルボ状管継手Ｃによ
って接続し、同様にその外周に断熱材りを充填した後保
護林Ｅで被包すればよい。Cut it to an appropriate length and insert it around the outer periphery of the piping materials B1 and B2 to be connected, fill the outer periphery of the connecting pipe fitting C of the piping materials B, B, and then fill it with an appropriate heat insulating material. It is sufficient to cover the outer peripheral surface with an appropriate protective material E. In the case of curved piping, for example, as shown in FIG. It is sufficient to connect them using pipe joints C, fill the outer periphery with heat insulating material, and then cover them with protected forest E.
［発明の効果］
本発明は以上の様に構成されており、その効果を要約す
ると下記の通りである。[Effects of the Invention] The present invention is configured as described above, and its effects are summarized as follows.
■筒状断熱材及び多層管を夫々別個に成形した後両者を
組付ける方法であるから、従来例の様に複雑且つ高価な
２重押出装置等が必要でなく、しかも使用目的に応じた
材質の筒状断熱材や外層管を組合せることができる。■Since the method involves molding the cylindrical heat insulating material and the multilayer pipe separately and then assembling the two, there is no need for complicated and expensive double extrusion equipment as in conventional methods, and the material can be made in accordance with the purpose of use. Can be combined with cylindrical insulation material and outer layer pipe.
■圧縮により筒状断熱材を縮径させて外層管内へ挿通す
る方法であるから、組付は作業を円滑に行なうことがで
き、且つ圧縮解除後筒状断熱材は拡径して外層管内面に
密接するので、一体性の高い断熱筒を得ることができ、
しかも筒状断熱材と外層管が芯ずれを起こす様な恐れも
ない。■Since this method reduces the diameter of the cylindrical insulation material by compression and inserts it into the outer layer pipe, the assembly work can be carried out smoothly. Because it is in close contact with the
Moreover, there is no fear of misalignment between the cylindrical heat insulating material and the outer layer pipe.
第１〜３図は本発明の実施例を示す概略工程説明図、第
４図（Ａ）、（Ｂ）は本発明によって得られる断熱筒の
変形例を示す一部破断側面図、第５図は空気圧と筒状断
熱材の肉厚変化との関係を示すグラフ、第６図は真空度
と筒状断熱材の肉厚変化の関係を示すグラフ、第７．８
図は本発明の断熱筒を用いた断熱配管施工例を示す縦断
面説明図である。
１：筒状断熱材 ２：外層管
３：袋 ４：吸引バイブ５：フリーピス
トン ６：管状加工装置Ａ、、Ａ２ ：断熱筒 Ｂ
、、Ｂ２ ：配管材Ｃ：管継手 Ｄ：断熱材
Ｅ・保護材
第１図（２）
第５図
空気圧（にＱｆ／ｃＭ２１
真空度 （龍Ｈｇ）1 to 3 are schematic process explanatory diagrams showing examples of the present invention, FIGS. 4(A) and (B) are partially cutaway side views showing modified examples of the heat insulating cylinder obtained by the present invention, and FIG. is a graph showing the relationship between air pressure and the wall thickness change of the cylindrical heat insulating material, Figure 6 is a graph showing the relationship between the degree of vacuum and the wall thickness change of the cylindrical heat insulating material, and 7.8
The figure is an explanatory longitudinal cross-sectional view showing an example of insulation piping construction using the insulation tube of the present invention. 1: Cylindrical heat insulating material 2: Outer layer tube 3: Bag 4: Suction vibrator 5: Free piston 6: Tubular processing device A, A2: Heat insulating tube B
,, B2: Piping material C: Pipe joint D: Insulating material E/protective material Fig. 1 (2) Fig. 5 Air pressure (to Qf/cM21 Degree of vacuum (Dragon Hg)
Claims (1)
る断熱筒を製造する方法であって、筒状断熱材と保護管
の寸法を下記［ I ］式の関係を満たす様に予め成形し
ておき、該筒状断熱材を半径方向に圧縮して下記［II］
式の関係を満たす様に該筒状断熱材の外径を縮径させて
から前記保護管内へ挿入し、次いで上記圧縮を解除する
ことを特徴とする断熱筒の製造方法。 筒状断熱材外径≧保護管内径・・・［ I ］ 圧縮後の筒状断熱材外径＜保護管内径・・・［II］[Claims] A method for manufacturing a heat insulating cylinder in which the outer periphery of a cylindrical heat insulating material that can be compressively deformed is covered with a protective tube, in which the dimensions of the cylindrical heat insulating material and the protective tube are expressed by the following formula [I]. The cylindrical heat insulating material is preformed so as to satisfy the following relationship, and the cylindrical heat insulating material is compressed in the radial direction to form the following [II]
A method of manufacturing a heat insulating cylinder, comprising: reducing the outer diameter of the cylindrical heat insulating material so as to satisfy the relationship of the formula, inserting the material into the protective tube, and then releasing the compression. Outer diameter of cylindrical insulation material ≧ Inner diameter of protection tube... [I] Outer diameter of cylindrical insulation material after compression < Inner diameter of protection tube... [II]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61188879A JPS6345030A (en) | 1986-08-12 | 1986-08-12 | Manufacture of heat insulation cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61188879A JPS6345030A (en) | 1986-08-12 | 1986-08-12 | Manufacture of heat insulation cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6345030A true JPS6345030A (en) | 1988-02-26 |
Family
ID=16231479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61188879A Pending JPS6345030A (en) | 1986-08-12 | 1986-08-12 | Manufacture of heat insulation cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6345030A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145450A (en) * | 1983-02-08 | 1984-08-20 | 三菱電機株式会社 | Controller for refrigeration cycle |
| US5157934A (en) * | 1990-06-29 | 1992-10-27 | Kabushiki Kaisha Toshiba | Controller for electrically driven expansion valve of refrigerating cycle |
| JP2018115728A (en) * | 2017-01-19 | 2018-07-26 | いすゞ自動車株式会社 | Torque rod, and method for mounting torque rod to mounting object |
-
1986
- 1986-08-12 JP JP61188879A patent/JPS6345030A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145450A (en) * | 1983-02-08 | 1984-08-20 | 三菱電機株式会社 | Controller for refrigeration cycle |
| JPH0340296B2 (en) * | 1983-02-08 | 1991-06-18 | ||
| US5157934A (en) * | 1990-06-29 | 1992-10-27 | Kabushiki Kaisha Toshiba | Controller for electrically driven expansion valve of refrigerating cycle |
| JP2018115728A (en) * | 2017-01-19 | 2018-07-26 | いすゞ自動車株式会社 | Torque rod, and method for mounting torque rod to mounting object |
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