JPH0448998B2 - - Google Patents
Info
- Publication number
- JPH0448998B2 JPH0448998B2 JP63204968A JP20496888A JPH0448998B2 JP H0448998 B2 JPH0448998 B2 JP H0448998B2 JP 63204968 A JP63204968 A JP 63204968A JP 20496888 A JP20496888 A JP 20496888A JP H0448998 B2 JPH0448998 B2 JP H0448998B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- pipe
- sheet material
- insulating sheet
- peripheral surface
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 89
- 230000002093 peripheral effect Effects 0.000 claims description 33
- 239000011810 insulating material Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 description 10
- -1 polyethylene Polymers 0.000 description 10
- 229920000573 polyethylene Polymers 0.000 description 10
- 239000006260 foam Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 4
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 238000005187 foaming Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、冷暖房用の熱媒或いは給湯用の温水
等の配管に用いられる断熱管であつて、詳しく
は、管本体の外周面に、管内外面が管軸芯方向に
沿つて波状に形成されている波型管を外嵌し、前
記管本体と前記波型管との間に断熱層を形成して
ある断熱管及びその製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an insulated pipe used for piping for heat medium for air conditioning and heating or hot water for hot water supply. This invention relates to an insulated tube in which a corrugated tube whose inner and outer surfaces are formed in a wave shape along the tube axis is fitted onto the outside, and a heat insulating layer is formed between the tube body and the corrugated tube, and a method for manufacturing the same. .
冒記した断熱管は、管本体の外周面に波型管を
外嵌してあるので、内径が管軸芯方向に沿つてほ
ぼ一定の外装管を管本体の外周面に外嵌し、この
管本体と外装管との間にポリエチレンフオーム等
の原料液を注入してポリエチレンフオーム等を発
泡生成させて断熱性の高い断熱層を形成するとと
もに、外装管を管本体に対して同芯状に保持させ
てある断熱管と比較して、断熱管の可撓性を維持
しながらその耐圧強度を高めることができる利点
があるものの、管本体と波型管との間に原料液を
注入してポリエチレンフオーム等の断熱層を形成
しようとしても、波型管の内面が管軸芯方向に沿
つて凹凸形状に形成されているから、原料液を管
軸芯方向に沿つて均一に流動分布させにくく、従
つて均質な断熱層を形成することが難しいので、
断熱性能が管軸芯方向に沿つて不規則に変動し易
い欠点があり、この欠点を解決する為に波型管の
波型形状を小さくして原料液の流動性を改善した
断熱管（例えば特開昭48−37753号公報参照）も
あるが、波型管の可撓性ならびに耐圧性が損なわ
れる欠点がある。
The above-mentioned heat-insulating pipe has a corrugated pipe fitted around the outer circumferential surface of the pipe body, so an armored pipe whose inner diameter is approximately constant along the tube axis is fitted onto the outer circumferential surface of the pipe body. A raw material liquid such as polyethylene foam is injected between the pipe body and the outer pipe to foam the polyethylene foam to form a highly heat-insulating layer, and the outer pipe is placed concentrically with the pipe body. Compared to an insulated pipe that is held in place, it has the advantage of increasing its pressure resistance while maintaining the flexibility of the insulated pipe. Even if you try to form a heat insulating layer such as polyethylene foam, the inner surface of the corrugated tube is uneven along the tube axis, making it difficult to distribute the raw material liquid evenly along the tube axis. , so it is difficult to form a homogeneous heat insulating layer.
There is a drawback that the insulation performance tends to fluctuate irregularly along the tube axis direction. There is also a method (see Japanese Patent Application Laid-Open No. 48-37753), but it has the disadvantage that the flexibility and pressure resistance of the corrugated pipe are impaired.
この為、従来の冒記断熱管においては、管本体
と波型管との間にポリエチレンフオーム等を発泡
生成して断熱層を形成するのではなく、波型管の
最小内径部に接する姿勢で、管径方向内方側に爪
状のスペーサを多数突設したシートを筒状に挿入
し、このスペーサを管軸芯方向に弾性変形させな
がら管本体を挿入して、シートと管本体との間に
断熱層として機能する空気層を形成し、同時にシ
ートに突設されるスペーサの管径方向への弾性復
元力により波型管を管本体に対して同芯状に保持
していた（例えば特開昭60−234194号公報参照）。 For this reason, in the conventional insulated pipe mentioned above, instead of forming a heat insulating layer by foaming polyethylene foam or the like between the pipe body and the corrugated pipe, it is , a sheet with a large number of claw-shaped spacers protruding from the inside in the radial direction of the tube is inserted into a cylindrical shape, and the tube body is inserted while the spacers are elastically deformed in the direction of the tube axis, thereby forming a connection between the sheet and the tube body. An air layer was formed in between that functioned as a heat insulating layer, and at the same time, the corrugated pipe was held concentrically with the pipe body by the elastic restoring force in the pipe diameter direction of the spacer protruding from the sheet (for example, (Refer to Japanese Patent Application Laid-Open No. 60-234194).
上述の通り、従来の冒記断熱管においては、管
本体と波型管との間に断熱層を形成するにあたつ
て、管本体の外周面に接するスペーサの管径方向
への弾性復元力のみによつて同芯状に保持される
シート材により形成していたため、運搬時や切断
等の加工時に波型管がシート材に対して管軸芯方
向にずれ動き易く、施工性が劣る欠点があるとと
もに、管本体とシートとの間に形成される比較的
厚みが厚く、しかも管軸芯方向に沿つて連なる空
気層を断熱層としていた為、断熱層内に大きな対
流が生じ易く、管本体と波型管との間にポリエチ
レンフオーム等を生成する場合に比べて断熱性が
劣る欠点があつた。
As mentioned above, in the conventional insulated pipe mentioned above, when forming a heat insulating layer between the pipe body and the corrugated pipe, the elastic restoring force in the pipe radial direction of the spacer in contact with the outer peripheral surface of the pipe body is applied. Since the pipe is made of a sheet material that is held concentrically by a chisel, the corrugated pipe tends to shift in the direction of the pipe axis relative to the sheet material during transportation or processing such as cutting, resulting in poor workability. In addition, because the air layer formed between the tube body and the sheet is relatively thick and runs along the tube axis as a heat insulating layer, large convection is likely to occur within the heat insulating layer, causing the pipe to deteriorate. The disadvantage was that the heat insulation properties were inferior to the case where polyethylene foam or the like was formed between the main body and the corrugated pipe.
本発明は上記実情に鑑みて為されたものであつ
て、波型管の内面形状に着目し、管本体と波型管
との間に形成する断熱層の構造を工夫することに
よつて、可撓性を損なうことなく大きな耐圧強度
を得られるものでありながら、従来よりも施工性
及び断熱性の優れた断熱管及びその製造方法を提
供することを目的とする。 The present invention has been made in view of the above circumstances, and by focusing on the inner surface shape of the corrugated tube and devising the structure of the heat insulating layer formed between the tube body and the corrugated tube, It is an object of the present invention to provide a heat insulating pipe that can obtain high pressure resistance without impairing flexibility and has superior workability and heat insulation properties compared to conventional pipes, and a method for manufacturing the same.
上記目的を達成する為の本発明による断熱管の
第１の特徴構成は、冒記した断熱管において、弾
性的に伸縮自在な断熱シート材を前記管本体の管
外周面に密着する姿勢で装着し、前記管本体に装
着した断熱シート材の外周面を、この断熱シート
材の外周面側に外嵌した前記波型管の最大内径部
側に入り込ませてある点にある。
The first feature of the insulated pipe according to the present invention to achieve the above object is that, in the above-mentioned insulated pipe, an elastically expandable heat insulating sheet material is attached to the pipe body so as to be in close contact with the outer peripheral surface of the pipe. However, the outer circumferential surface of the heat insulating sheet material attached to the tube body is inserted into the maximum inner diameter side of the corrugated tube fitted onto the outer circumferential surface side of the heat insulating sheet material.
第２の特徴構成は、前記断熱シート材の肉厚
は、前記管本体の管外周面に装着された状態での
前記断熱シート材部分の最大外径が前記波型管の
最小内径部よりも大径となるように設定されてい
る点にある。 A second feature is that the wall thickness of the heat insulating sheet material is such that the maximum outer diameter of the heat insulating sheet material portion when attached to the outer circumferential surface of the pipe body is greater than the minimum inner diameter portion of the corrugated pipe. The point is that it is set to have a large diameter.
第３の特徴構成は、前記管本体の管外周面に装
着された断熱シート材の管径方向外方側の面が非
通気性に形成されている点にある。 A third characteristic configuration is that the outer surface in the pipe diameter direction of the heat insulating sheet material attached to the outer peripheral surface of the pipe body is formed to be impermeable.
第４の特徴構成は、前記断熱シート材が、前記
管本体外周面側に接する伸縮自在な断熱材層と前
記波型管内周面側に接する被膜材層とを備えたも
のである点にある。 A fourth characteristic configuration is that the heat insulating sheet material includes a stretchable heat insulating material layer in contact with the outer peripheral surface of the pipe body and a coating material layer in contact with the inner peripheral surface of the corrugated pipe. .
第５の特徴構成は、前記管本体の管外周面に装
着された断熱シート材の管径方向内外方側の面が
凹凸面に形成されている点にある。 A fifth characteristic configuration is that the inner and outer surfaces in the pipe diameter direction of the heat insulating sheet material attached to the outer circumferential surface of the pipe main body are formed into uneven surfaces.
第６の特徴構成は、前記凹凸面に形成されてい
る前記被膜材層の外面側への突起部と前記断熱シ
ート材層との間に中空部が形成されている点にあ
る。 A sixth characteristic configuration is that a hollow portion is formed between the protrusion toward the outer surface of the coating material layer formed on the uneven surface and the heat insulating sheet material layer.
又、本発明による断熱管の製造方法の特徴構成
は、
(イ) 前記断熱シート材を前記管本体の管外周面に
装着固定する工程。 Further, the characteristic structure of the method for manufacturing a heat insulating pipe according to the present invention includes: (a) a step of attaching and fixing the heat insulating sheet material to the outer circumferential surface of the pipe body;
(ロ) 前記管本体に装着固定された前記断熱シート
材の外周面と前記波型管の内周面との間に流体
を圧入しながら、前記波型管を外嵌する工程。(b) A step of fitting the corrugated tube onto the outside while pressurizing fluid between the outer peripheral surface of the heat insulating sheet material fixedly attached to the tube body and the inner peripheral surface of the corrugated tube.
上記(イ)、(ロ)の工程を備えている点にある。 It has the steps (a) and (b) above.
第１の特徴構成によれば、
管本体の管外周面に沿つて、断熱性に劣る空
気層ではなく、断熱性の優れた均質な断熱シー
ト材による断熱層が形成される。
According to the first feature, a heat insulating layer made of a homogeneous heat insulating sheet material with excellent heat insulating properties is formed along the outer circumferential surface of the tube body, instead of an air layer with poor heat insulating properties.
管本体外周面と波型管内周面との間の断熱シ
ート材は、波型管内周面と接触する箇所では管
径方向への弾性復元力によつて波型管を管本体
に対して同芯状に保持し、波型管の最大内径部
側に入り込んだ部分は、波型管の断熱シート材
に対する管軸芯方向へのずれ動きを阻止し易
い。 The heat insulating sheet material between the outer peripheral surface of the pipe body and the inner peripheral surface of the corrugated pipe maintains the corrugated pipe in the same position as the pipe body due to the elastic restoring force in the pipe radial direction at the points where it contacts the inner peripheral surface of the corrugated pipe. The portion held core-like and inserted into the maximum inner diameter side of the corrugated tube tends to prevent the corrugated tube from shifting in the tube axis direction with respect to the heat insulating sheet material.
断熱シート材は波型管の最大内径部側に入り
込んでいるから、厚い断熱層が形成される。 Since the heat insulating sheet material is inserted into the maximum inner diameter side of the corrugated pipe, a thick heat insulating layer is formed.
第２の特徴構成によれば、波型管の最小内径部
と管本体との間の断熱シート材部分は縮径方向に
大きく弾性変形し、このときに生じる断熱シート
材の大きな弾性復元力により、波型管は管本体に
対して同芯状に強力に保持される。 According to the second characteristic configuration, the portion of the heat insulating sheet material between the minimum inner diameter part of the corrugated pipe and the pipe body is largely elastically deformed in the diametrical direction, and due to the large elastic restoring force of the heat insulating sheet material generated at this time. , the corrugated tube is strongly held concentrically with respect to the tube body.
第３の特徴構成によれば、非通気性の面が管径
方向外側に向けられて断熱シート材が管本体の外
周面に装着されているから、波型管の最大内径部
と断熱シート材の外周面との間に形成される空間
と断熱シート材の内径とに亘る空気の対流が生じ
ない。 According to the third characteristic configuration, since the heat insulating sheet material is attached to the outer peripheral surface of the pipe body with the non-breathable surface facing outward in the pipe radial direction, the maximum inner diameter of the corrugated pipe and the heat insulating sheet material Air convection does not occur between the space formed between the outer peripheral surface of the heat insulating sheet material and the inner diameter of the heat insulating sheet material.
第４の特徴構成によれば、断熱シート材の波型
管内周面側に接する表面を、滑りが生じ易い円滑
な面に形成できる。 According to the fourth feature, the surface of the heat insulating sheet material that is in contact with the inner circumferential surface of the corrugated pipe can be formed into a smooth surface that is prone to slipping.
第５の特徴構成によれば、断熱シート材の波型
管が外嵌される方の面が凹凸面に形成されている
から、凹凸面の突起部が弾性的に倒れ変形し易
く、波型管を断熱シート材の外面に外嵌する際
に、波型管と断熱シート材との管軸芯方向への相
対移動に伴う突起部と波型管の最小内径部との接
当により、突起部が弾性的に倒れ変形しながら波
型管が外嵌されるから、断熱管組付時の波型管と
断熱シート材との間の挿入抵抗を軽減できる。 According to the fifth characteristic configuration, since the surface of the heat insulating sheet material on which the corrugated tube is fitted is formed into an uneven surface, the protrusions on the uneven surface are likely to fall down elastically and deform, and the corrugated pipe When fitting the pipe onto the outer surface of the heat insulating sheet material, the protrusion is caused by contact between the protrusion and the minimum inner diameter part of the corrugated pipe due to the relative movement of the corrugated pipe and the heat insulating sheet material in the tube axis direction. Since the corrugated pipe is fitted onto the outside while the parts are elastically tilted and deformed, insertion resistance between the corrugated pipe and the heat insulating sheet material when assembling the heat insulating pipe can be reduced.
第６の特徴構成によれば、中空部が圧縮変形さ
れ易く、断熱シート材が波型管の最小内径部と管
本体との間で挾圧されても、断熱材層自体の空隙
率の減少が極力抑制される。 According to the sixth characteristic configuration, the hollow part is easily compressed and deformed, and even if the heat insulating sheet material is compressed between the minimum inner diameter part of the corrugated pipe and the pipe body, the porosity of the heat insulating material layer itself is reduced. is suppressed as much as possible.
本発明による断熱管の製造方法によれば、断熱
シート材と波型管との間に圧入される流体が断熱
シート材外周面と波型管の最小内径部との間を通
過する際に、波型管を拡径方向に変形させ、か
つ、断熱シート材を縮径方向に圧縮変形させ得る
ので、断熱シート材外周面と波型管の最小内径部
との間の挿入抵抗を軽減できる。 According to the method for manufacturing a heat-insulating pipe according to the present invention, when the fluid that is press-fitted between the heat-insulating sheet material and the corrugated pipe passes between the outer peripheral surface of the heat-insulating sheet material and the minimum inner diameter portion of the corrugated pipe, Since the corrugated tube can be deformed in the diameter expanding direction and the heat insulating sheet material can be compressively deformed in the diameter reducing direction, insertion resistance between the outer peripheral surface of the heat insulating sheet material and the minimum inner diameter portion of the corrugated tube can be reduced.
第１の特徴構成による断熱管は、前記の作用
により、管本体と波型管との間にポリウレタンフ
オーム等を発泡生成させるに比べて管軸芯方向に
沿つて均質な断熱層を形成できるとともに、前記
の作用との相乗により、管本体と波型管との間
に空気層を形成して断熱するに比べて断熱効果が
高くなり、断熱性が優れている。
Due to the above-mentioned effect, the heat-insulating pipe according to the first characteristic structure can form a more homogeneous heat-insulating layer along the pipe axis direction than when polyurethane foam or the like is foamed between the pipe body and the corrugated pipe. Due to the synergy with the above-mentioned effects, the heat insulating effect is higher than that of forming an air layer between the pipe body and the corrugated pipe to achieve heat insulation, and the heat insulating property is excellent.
更に、前記の作用により、運搬時や切断等の
加工時に波型管が断熱シート材に対してずれ動き
にくく、施工性が優れている。 Furthermore, due to the above-mentioned effect, the corrugated pipe is difficult to shift relative to the heat insulating sheet material during transportation or processing such as cutting, and workability is excellent.
従つて、可撓性を損なうことなく大きな耐圧強
度を得られるものでありながら、従来よりも施工
性及び断熱性の優れた断熱管を提供できる。 Therefore, it is possible to provide a heat insulating pipe that can obtain high pressure resistance without impairing flexibility and has superior workability and heat insulation properties compared to conventional pipes.
第２の特徴構成による断熱管は、波型管を強力
に保持でき、しかも、波型管の外径を極力小径化
しながらも大きな可撓性を維持し易い断熱管を提
供できる。 The heat-insulating pipe according to the second characteristic configuration can strongly hold the corrugated pipe, and can provide a heat-insulating pipe that can easily maintain great flexibility while reducing the outer diameter of the corrugated pipe as much as possible.
第３の特徴構成による断熱管は、波型管内面と
断熱シート材外面との間に形成される空間を介し
ての熱の出入りが少ないから、全体として断熱性
に優れた断熱管を提供できる。 The heat insulating pipe according to the third characteristic configuration has little heat entering and exiting through the space formed between the inner surface of the corrugated pipe and the outer surface of the heat insulating sheet material, so it is possible to provide a heat insulating pipe with excellent insulation properties as a whole. .
第４の特徴構成による断熱管は、断熱シート材
の波型管側表面が滑り易いから、波型管を断熱シ
ート材の外周面に外嵌する際の挿入抵抗を軽減で
き、製作組付けが容易な断熱管を提供できる。 In the heat-insulating pipe according to the fourth characteristic configuration, since the surface of the heat-insulating sheet material on the corrugated pipe side is slippery, insertion resistance when fitting the corrugated pipe onto the outer circumferential surface of the heat-insulating sheet material can be reduced, and manufacturing and assembly can be facilitated. Can provide easy insulation pipes.
第５の特徴構成による断熱管は、波型管と断熱
シート材との間の挿入抵抗の一層の軽減によつ
て、管本体に装着される断熱シート材の外径を波
型管の最小内径部に比べて極力大きくすることが
でき、断熱シート材の充填率を多くして一層断熱
効果が優れ、しかも可撓性を損ないにくい断熱管
を提供できる。 The heat-insulating pipe according to the fifth characteristic configuration has the advantage of further reducing the insertion resistance between the corrugated pipe and the heat-insulating sheet material, so that the outer diameter of the heat-insulating sheet material attached to the pipe body is the minimum inner diameter of the corrugated pipe. It is possible to provide a heat insulating pipe which has an even better heat insulating effect by increasing the filling rate of the heat insulating sheet material and which does not easily lose its flexibility.
第６の特徴構成による断熱管は、断熱材層の空
隙率の減少を抑制できるから、波型管の最小内径
部と管本体との間の断熱シート材部分の断熱効果
を適正に維持し易く、一層断熱性能の優れた断熱
管を提供できる。 The heat-insulating pipe according to the sixth characteristic configuration can suppress the decrease in the porosity of the heat-insulating material layer, so it is easy to maintain the proper heat-insulating effect of the heat-insulating sheet material between the minimum inner diameter part of the corrugated pipe and the pipe body. , it is possible to provide a heat-insulating pipe with even better heat-insulating performance.
本発明による断熱管の製造方法によれば、管本
体の外周面に装着された断熱シート材に対して波
型管を円滑に外嵌させることができるから、組付
製作の手間が少なく、製造コストを低減できる。 According to the method for manufacturing a heat insulating pipe according to the present invention, since the corrugated pipe can be smoothly fitted onto the heat insulating sheet material attached to the outer peripheral surface of the pipe body, there is less labor involved in assembling and manufacturing. Cost can 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、銅やアルミ合金等の金
属、合成樹脂、或いは金属と合成樹脂との複合材
で形成した管本体１の管外周面に密着する姿勢で
断熱シート材２を巻付けて装着し、この断熱シー
ト材２の外周面に波型管３を外嵌して、管本体１
と波型管３との間に断熱層が形成される断熱管Ａ
を構成してある。 As shown in Fig. 1, a heat insulating sheet material 2 is wrapped around a pipe body 1 made of metal such as copper or aluminum alloy, synthetic resin, or a composite material of metal and synthetic resin so as to be in close contact with the outer peripheral surface of the pipe. The corrugated pipe 3 is fitted onto the outer peripheral surface of the heat insulating sheet material 2, and the pipe body 1
A heat insulating pipe A in which a heat insulating layer is formed between the and the corrugated pipe 3
has been configured.
前記断熱シート材２は、単なる弾性的に伸縮自
在なポリエチレンフオーム、ポリウレタンフオー
ム等のシート材或いは一側面が非通気性に形成さ
れている弾性的に伸縮自在なポリエチレンフオー
ム、ポリウレタンフオーム等のシート材であつて
も良いが、本実施例においては波型管３と断熱シ
ート材２との挿入抵抗を軽減する為、発泡倍率が
15倍程度以上のポリエチレン高発泡体（耐熱温度
120℃程度）で形成される弾性的に伸縮自在な断
熱材層２ａの一側面に、厚さ0.01乃至0.02mm程度
のポリエチレンの非通気性の被膜材層２ｂを熱融
着して構成されており、被膜材層２ｂ側に四角錐
状の突起部４を、波型管３の波型形状のピツチの
半分程度のピツチで基板目状に配置形成して、凹
凸面を形成してある。 The heat insulating sheet material 2 may be a mere elastically stretchable sheet material such as polyethylene foam or polyurethane foam, or an elastically stretchable sheet material such as polyethylene foam or polyurethane foam whose one side is non-breathable. However, in this example, in order to reduce the insertion resistance between the corrugated pipe 3 and the heat insulating sheet material 2, the foaming ratio is
High polyethylene foam (heat-resistant temperature
A non-breathable coating material layer 2b made of polyethylene with a thickness of about 0.01 to 0.02 mm is thermally fused to one side of an elastically expandable heat insulating material layer 2a formed at a temperature of about 120°C. On the side of the coating material layer 2b, square pyramid-shaped protrusions 4 are arranged in a substrate pattern with a pitch of about half the pitch of the corrugated shape of the corrugated tube 3, thereby forming an uneven surface.
前記断熱材層２ａと前記被覆材層２ｂとは接着
剤で接着するものであつても良い。 The heat insulating material layer 2a and the covering material layer 2b may be bonded together with an adhesive.
又、前記断熱シート材２は、帯状に形成した断
熱シート材２を管本体１に対して平行に位置させ
て、管本体１周方向に巻き付けても良く、帯状に
形成した断熱シート材２を管本体１に対して螺旋
状に巻き付けても良い。 Further, the heat insulating sheet material 2 may be formed by placing the heat insulating sheet material 2 formed in a band shape in parallel to the pipe body 1 and wrapping it around the pipe body 1; It may be wound spirally around the tube body 1.
更に、前記断熱シート材２を筒状に形成して、
管本体１外周面に対して弾性的に外嵌させても良
い。 Furthermore, the heat insulating sheet material 2 is formed into a cylindrical shape,
It may be elastically fitted onto the outer peripheral surface of the tube body 1.
前記突起部４の形状としては、四角錐状に限ら
ず、多角錐状、円錐状、半球状、柱状、細長い山
状に形成しても良い。 The shape of the protrusion 4 is not limited to a quadrangular pyramid shape, but may be formed into a polygonal pyramid shape, a conical shape, a hemispherical shape, a columnar shape, or an elongated mountain shape.
更に、第４図、第５図に示すように、断熱シー
ト材２に三角山形の突起部４を連続的に形成して
前記凹凸面を形成し、この連続的な突起部４が管
軸芯Ｘ方向に沿う姿勢で管本体１に巻き付けても
良く、図示はしないが、螺旋状に巻き付けても良
い。 Furthermore, as shown in FIGS. 4 and 5, triangular mountain-shaped protrusions 4 are continuously formed on the heat insulating sheet material 2 to form the uneven surface, and these continuous protrusions 4 align with the tube axis. It may be wound around the tube body 1 in a posture along the X direction, or it may be wound spirally, although not shown.
この場合、前記連続的に形成される突起部４の
山形形状としては、三角形状だけでなく、その他
の多角形状、円弧形状であつても良い。 In this case, the chevron shape of the continuously formed projections 4 is not limited to a triangular shape, but may be other polygonal shapes or circular arc shapes.
又、第３図に示すように、被膜材層２ｂの突起
部４と断熱材層２ａ外周面との間に中空部５を形
成して実施しても良い。 Alternatively, as shown in FIG. 3, a hollow portion 5 may be formed between the protrusion 4 of the coating material layer 2b and the outer peripheral surface of the heat insulating material layer 2a.
前記波型管３は、波型面が螺旋状に形成されて
いる螺旋管でも良いが、本実施例においては、管
軸芯方向に沿つて大径部と小径部とが交互に形成
されているポリエチレン製のいわゆるコルゲート
管であつて、その最小内径部３ａの内径D1を管
本体１の外径D2に断熱シート材２の最大肉厚ｔ
の２倍を加えた長さである断熱シート材２部分の
最大外径D3よりも小径に形成して、断熱シート
材２が管本体１の外周面と波型管３の最小内径部
３ａとの間で圧縮変形され、このときの弾性復元
力で波型管３が管本体１に対して同芯状に保持さ
れるとともに、波型管３の大径部に形成される環
状空間６内に断熱シート材２の凹凸面が入り込む
ように構成してある。 The corrugated tube 3 may be a helical tube in which the corrugated surface is formed in a spiral shape, but in this embodiment, large diameter portions and small diameter portions are alternately formed along the tube axis direction. It is a so-called corrugated pipe made of polyethylene, and the inside diameter D 1 of the minimum inside diameter part 3a is the outside diameter D 2 of the pipe body 1 and the maximum wall thickness t of the heat insulating sheet material 2.
The diameter of the heat insulating sheet material 2 is smaller than the maximum outer diameter D3 of the heat insulating sheet material 2 portion, which is twice the length of the heat insulating sheet material 2. The elastic restoring force at this time holds the corrugated tube 3 concentrically with respect to the tube body 1, and the annular space 6 formed in the large diameter portion of the corrugated tube 3 The structure is such that the uneven surface of the heat insulating sheet material 2 fits inside.
前記波型管３が自己消火性を有する塩化ビニー
ル樹脂で形成したものであると防災上好ましい。 It is preferable for disaster prevention that the corrugated pipe 3 is made of vinyl chloride resin having self-extinguishing properties.
次にこの断熱管Ａの製造方法について説明す
る。 Next, a method of manufacturing this heat insulating pipe A will be explained.
第２図に示すように、突起部４の配列方向に沿
つて帯状に切断した断熱シート材２をその長手方
向に沿う側縁どうしを互いに対向させる姿勢で管
本体１に巻き付けて装着し、管本体１の一端側に
断熱シート材２の上側から薄肉金属製のキヤツプ
部材７を外嵌して断熱シート材２を管本体１に固
定するとともに、管本体１を閉塞する。 As shown in FIG. 2, a heat insulating sheet material 2 cut into strips along the arrangement direction of the protrusions 4 is wrapped around the tube body 1 with its longitudinal side edges facing each other, and attached to the tube. A cap member 7 made of thin metal is fitted onto one end of the main body 1 from above the heat insulating sheet material 2 to fix the heat insulating sheet material 2 to the pipe body 1 and close the pipe main body 1.
前記断熱シート材２は、長手方向が突起部４の
配列方向に対して交叉する姿勢で切断して帯状に
形成しても良く、又、断熱シート材２を管本体１
外周面に接着して固定しても良い。 The heat insulating sheet material 2 may be cut into a belt shape with its longitudinal direction intersecting the arrangement direction of the protrusions 4.
It may be fixed by adhering to the outer peripheral surface.
次に、管本体１のキヤツプ部材７側端部を波型
管３の一端側に当て付け、高圧空気を矢印のよう
に波型管３の他端側から波型管３内に供給しなが
ら管本体１を断熱シート材２と共に管軸芯方向に
押圧すると、高圧空気が波型管３の最小内径部３
ａと断熱シート材２との間を通過するに伴つて波
型管３が拡径方向に変形され、かつ、断熱シート
材２が縮径方向に圧縮変形され、これによつて波
型管３と断熱シート材２との間の挿入抵抗が軽減
されて、波型管３を断熱シート材２の外周面に対
して円滑に外嵌することができ、製作組付けが能
率良く行える。 Next, the end of the tube body 1 on the side of the cap member 7 is brought into contact with one end of the corrugated tube 3, and while supplying high pressure air into the corrugated tube 3 from the other end of the corrugated tube 3 as shown by the arrow. When the tube body 1 is pressed together with the heat insulating sheet material 2 in the direction of the tube axis, high-pressure air flows into the minimum inner diameter portion 3 of the corrugated tube 3.
As it passes between a and the heat insulating sheet material 2, the corrugated pipe 3 is deformed in the diameter expanding direction, and the heat insulating sheet material 2 is compressively deformed in the diameter reducing direction, whereby the corrugated pipe 3 The insertion resistance between the and the heat insulating sheet material 2 is reduced, the corrugated tube 3 can be smoothly fitted onto the outer peripheral surface of the heat insulating sheet material 2, and manufacturing and assembly can be carried out efficiently.
前記高圧空気を波型管内に供給するにあたつ
て、波型管３の挿入方向先端側端部から高圧空気
を供給するように構成すると、管本体１をキヤツ
プ部材７で閉塞する手間を省くことができる。 When supplying the high-pressure air into the corrugated tube, if the high-pressure air is supplied from the distal end of the corrugated tube 3 in the insertion direction, the trouble of closing the tube body 1 with the cap member 7 can be saved. be able to.
前記断熱シート材としては、ガラス繊維等で形
成した弾性を備えている無機質断熱材層だけで構
成しても良く、無機質断熱材層の一側面に被膜材
層を被覆して構成しても良い。
The heat insulating sheet material may be composed only of an elastic inorganic heat insulating material layer made of glass fiber or the like, or may be constructed by covering one side of the inorganic heat insulating material layer with a coating material layer. .
前記波型管の波型形状は、実施例で示したよう
な管軸芯方向に沿つて台形状に凹凸しながら連続
する形状の他、四角形状、三角形状或いは滑らか
な曲面状に連続する形状であつても良い。 The corrugated shape of the corrugated tube may be a continuation of a trapezoidal uneven shape along the tube axis direction as shown in the example, a rectangular shape, a triangular shape, or a continuous shape of a smooth curved surface. It's okay to be.
尚、特許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、該記入により本発明は
添付図面の構造および方法に限定されるものでは
ない。 Note that although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structures and methods shown in the accompanying drawings.
図面は本発明に係る断熱管及びその製造方法の
実施例を示し、第１図は一部断面側面図、第２図
は製造方法を示す一部断面側面図、第３図、第４
図は断熱管の別実施例を示す一部断面側面図、第
５図は管本体外周面に装着した断熱シート材の別
実施例を示す斜視図である。
１……管本体、２……断熱シート材、２ａ……
断熱材層、２ｂ……被膜材層、３……波型管、３
ａ……最小内径部、３ｂ……最大内径部、４……
突起部、５……中空部、D3……最大外径、Ｘ…
…管軸芯。
The drawings show an embodiment of the insulated pipe and its manufacturing method according to the present invention, and FIG. 1 is a partially sectional side view, FIG. 2 is a partially sectional side view showing the manufacturing method, FIGS. 3 and 4.
The figure is a partially sectional side view showing another embodiment of the heat insulating tube, and FIG. 5 is a perspective view showing another embodiment of the heat insulating sheet material attached to the outer peripheral surface of the tube body. 1...Pipe body, 2...Insulating sheet material, 2a...
Heat insulating material layer, 2b...Coating material layer, 3...Corrugated pipe, 3
a...Minimum inner diameter part, 3b...Maximum inner diameter part, 4...
Projection, 5... Hollow part, D 3 ... Maximum outer diameter, X...
...Tube axis core.
Claims (1)
向に沿つて波状に形成されている波型管３を外嵌
し、前記管本体１と前記波型管３との間に断熱層
を形成してある断熱管において、弾性的に伸縮自
在な断熱シート材２を前記管本体１の管外周面に
密着する姿勢で装着し、前記管本体１に装着した
断熱シート材２の外周面を、この断熱シート材２
の外周面に外嵌した前記波型管３の最大内径部３
ｂ側に入り込ませてあることを特徴とする断熱
管。 ２ 前記断熱シート材２の肉厚ｔは、前記管本体
１の管外周面に装着された状態での前記断熱シー
ト材２部分の最大外径D3が前記波型管３の最小
内径部３ａよりも大径となるように設定されてい
る請求項１記載の断熱材。 ３ 前記管本体１の管外周面に装着された断熱シ
ート材２の管径方向外方側の面が非通気性に形成
されている請求項１又は２記載の断熱管。 ４ 前記断熱シート材２が、前記管本体１外周面
側に接する伸縮自在な断熱材層２ａと前記波型管
３内周面側に接する被膜材層２ｂとを備えたもの
である請求項１，２又は３記載の断熱管。 ５ 前記管本体１の管外周面に装着された断熱シ
ート材２の管径方向外方側の面が凹凸面に形成さ
れている請求項１，２，３又は４記載の断熱管。 ６ 前記凹凸面に形成されている前記被膜材層２
ｂの外面側への突起部４と前記断熱材層２ａとの
間に中空部５が形成されている請求項５記載の断
熱管。 ７ (イ) 前記断熱シート材２を前記管本体１の管
外周面に装着固定する工程。 (ロ) 前記管本体１に装着固定された前記断熱シー
ト材２の外周面と前記波型管３の内周面との間
に流体を圧入しながら、前記波型管３を外嵌す
る工程。 上記(イ)、(ロ)の工程を備えている請求項１，２，
３，４，５又は６記載の断熱管の製造方法。[Claims] 1. A corrugated tube 3 whose inner and outer tube surfaces are formed in a wave shape along the tube axis X direction is fitted onto the outer peripheral surface of the tube body 1, and the tube body 1 and the corrugated tube In the heat insulating pipe in which a heat insulating layer is formed between the pipe body 1 and the heat insulating sheet material 2, an elastically expandable heat insulating sheet material 2 is attached to the pipe body 1 so as to be in close contact with the outer peripheral surface of the pipe body 1. The outer peripheral surface of the heat insulating sheet material 2 is
The maximum inner diameter portion 3 of the corrugated pipe 3 fitted onto the outer circumferential surface of
An insulated pipe characterized by being inserted into the b side. 2 The wall thickness t of the heat insulating sheet material 2 is such that the maximum outer diameter D 3 of the heat insulating sheet material 2 portion when attached to the outer peripheral surface of the pipe body 1 is the minimum inner diameter portion 3a of the corrugated pipe 3. The heat insulating material according to claim 1, wherein the heat insulating material is set to have a diameter larger than that of the heat insulating material. 3. The heat insulating pipe according to claim 1 or 2, wherein the outer surface in the pipe radial direction of the heat insulating sheet material 2 attached to the outer peripheral surface of the pipe body 1 is formed to be impermeable. 4. Claim 1, wherein the heat insulating sheet material 2 comprises a stretchable heat insulating material layer 2a in contact with the outer peripheral surface of the pipe body 1 and a coating material layer 2b in contact with the inner peripheral surface of the corrugated pipe 3. , 2 or 3. 5. The heat insulating pipe according to claim 1, 2, 3 or 4, wherein the outer surface in the pipe radial direction of the heat insulating sheet material 2 attached to the outer peripheral surface of the pipe body 1 is formed into an uneven surface. 6 The coating material layer 2 formed on the uneven surface
6. The heat insulating pipe according to claim 5, wherein a hollow part 5 is formed between the protrusion 4 toward the outer surface of b and the heat insulating material layer 2a. 7 (a) A step of attaching and fixing the heat insulating sheet material 2 to the outer peripheral surface of the tube body 1. (b) Fitting the corrugated pipe 3 onto the outside while pressurizing fluid between the outer peripheral surface of the heat insulating sheet material 2 attached and fixed to the pipe body 1 and the inner peripheral surface of the corrugated pipe 3 . Claims 1 and 2, comprising the steps (a) and (b) above.
3, 4, 5 or 6, the method for producing a heat insulating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63204968A JPH0257790A (en) | 1988-08-18 | 1988-08-18 | Heat-insulated pipe and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63204968A JPH0257790A (en) | 1988-08-18 | 1988-08-18 | Heat-insulated pipe and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0257790A JPH0257790A (en) | 1990-02-27 |
| JPH0448998B2 true JPH0448998B2 (en) | 1992-08-10 |
Family
ID=16499279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63204968A Granted JPH0257790A (en) | 1988-08-18 | 1988-08-18 | Heat-insulated pipe and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0257790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011158026A (en) * | 2010-02-01 | 2011-08-18 | Aron Kasei Co Ltd | Drainage flexible pipe and connecting part-connecting structure |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09210291A (en) * | 1996-02-05 | 1997-08-12 | Furukawa Electric Co Ltd:The | Adiabatic tube |
| DE202006009337U1 (en) * | 2006-06-14 | 2006-08-17 | Brugg Rohr Ag, Holding | Heat-insulated pipe used in a heating system and in drinking water and effluent lines comprises an inner pipe, a heat insulating layer surrounding the inner pipe, a film surrounding the heat insulating layer and a corrugated outer pipe |
| FI125098B (en) * | 2007-05-23 | 2015-05-29 | Uponor Innovation Ab | A piping element and a method and apparatus for making it |
| EP3298318B1 (en) * | 2015-05-19 | 2024-07-03 | Owens Corning Intellectual Capital, LLC | Insulation pad for pipes and vessels |
| JP7197356B2 (en) * | 2016-06-09 | 2022-12-27 | 株式会社ブリヂストン | Composite pipe |
| JP2017219150A (en) * | 2016-06-09 | 2017-12-14 | 株式会社ブリヂストン | Duplex tube |
| JP2017219149A (en) * | 2016-06-09 | 2017-12-14 | 株式会社ブリヂストン | Compound pipe |
| JP6985009B2 (en) * | 2016-12-26 | 2021-12-22 | 株式会社ブリヂストン | Composite pipe |
| CN110114602A (en) * | 2016-12-26 | 2019-08-09 | 株式会社普利司通 | Multiple tube |
| JP6820196B2 (en) * | 2016-12-26 | 2021-01-27 | 株式会社ブリヂストン | Composite pipe |
| JP2019105327A (en) * | 2017-12-13 | 2019-06-27 | 株式会社ブリヂストン | Composite tube |
| JP2019105326A (en) * | 2017-12-13 | 2019-06-27 | 株式会社ブリヂストン | Composite tube |
| JP7006218B2 (en) * | 2017-12-13 | 2022-01-24 | 株式会社ブリヂストン | Composite pipe |
| JP7148047B2 (en) * | 2018-06-11 | 2022-10-05 | 株式会社ブリヂストン | Composite pipe |
| JP7376277B2 (en) * | 2019-08-13 | 2023-11-08 | 未来工業株式会社 | Corrugated double pipe and water pipe equipment |
| CN111895224B (en) * | 2020-07-10 | 2022-02-11 | 中国兵器工业第五九研究所 | A modular insulation shell structure |
| DE102023136175A1 (en) * | 2023-12-21 | 2025-06-26 | REHAU Industries SE & Co. KG | Multi-layer corrugated pipe outer jacket and this comprehensive pipe arrangement |
-
1988
- 1988-08-18 JP JP63204968A patent/JPH0257790A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011158026A (en) * | 2010-02-01 | 2011-08-18 | Aron Kasei Co Ltd | Drainage flexible pipe and connecting part-connecting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0257790A (en) | 1990-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0448998B2 (en) | ||
| US4351366A (en) | Heat-insulated conduit | |
| US3711124A (en) | Connections for insulated pipes | |
| EP2113700A2 (en) | Thermally insulated hose and method for producing the same | |
| JPH10318449A (en) | Flexible transport components | |
| KR102112197B1 (en) | Low temperature pipe insulation apparatus | |
| JP5721532B2 (en) | Insulated double pipe | |
| RU2002123325A (en) | HEAT-INSULATED PIPE FOR PIPELINES AND METHOD OF ITS MANUFACTURE (OPTIONS) | |
| US4743329A (en) | Process for manufacturing of composite pipes | |
| US3777501A (en) | Capillary insulation | |
| WO2019117220A1 (en) | Composite pipe | |
| JPH0477193B2 (en) | ||
| JP2023166581A (en) | Pipe device and corrugated double pipe | |
| US3460579A (en) | Insulated flexible sub-zero hose | |
| JP4832251B2 (en) | Manufacturing method of synthetic resin hose | |
| JP2019105330A (en) | Composite tube | |
| JP2004316675A (en) | Thermal insulation hose | |
| JP2008062533A (en) | Manufacturing method of heat insulation duct hose | |
| JP3371243B2 (en) | Insulated hose | |
| JPH05187594A (en) | Heat insulating hose | |
| RU2180069C1 (en) | Flexible expansion joint | |
| JPS643894Y2 (en) | ||
| JPH05263942A (en) | Seal packing | |
| JP2015075174A (en) | Hot/cold water pipeline | |
| JP2026042358A (en) | composite pipe |