JPH025197Y2 - - Google Patents
Info
- Publication number
- JPH025197Y2 JPH025197Y2 JP1983174701U JP17470183U JPH025197Y2 JP H025197 Y2 JPH025197 Y2 JP H025197Y2 JP 1983174701 U JP1983174701 U JP 1983174701U JP 17470183 U JP17470183 U JP 17470183U JP H025197 Y2 JPH025197 Y2 JP H025197Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- main pipe
- insulating material
- compression
- heat insulating
- 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
Links
- 239000011810 insulating material Substances 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、埋設熱供給二重管の中間固定構造
に関するもので、詳しくは、温度上昇および地震
等による本管と外管との相対変位を防止した二重
管の中間固定構造に関するものである。[Detailed explanation of the invention] [Industrial application field] This invention relates to an intermediate fixed structure for buried double heat supply pipes. This invention relates to a double-pipe intermediate fixing structure that prevents this.
埋設熱供給二重管は、地域冷暖房の熱供給管、
地熱発電の熱輸送配管、火力発電の熱輸送配管、
製鉄設備におけるヤード配管、油温上昇トレース
管が付いた油輸送二重管パイプライン等で採用さ
れている。これらに使用されている二重管は、本
管と外管との間を断熱構造にすることによつて、
本管内を輸送される熱流体の熱損失を可及的に防
止している。そして、この二重管では、地震等に
よつて本管と外管とが相対的に変位しないよう
に、適宜距離毎に、本管と外管とを互に結合させ
ている。
Buried heat supply double pipes are heat supply pipes for district heating and cooling,
Heat transport piping for geothermal power generation, heat transport piping for thermal power generation,
It is used in yard piping in steel manufacturing facilities, oil transport double pipe pipelines with oil temperature rise trace pipes, etc. The double pipes used in these products have an insulating structure between the main pipe and the outer pipe.
Heat loss of the thermal fluid transported in the main pipe is prevented as much as possible. In this double pipe, the main pipe and the outer pipe are connected to each other at appropriate distances to prevent relative displacement of the main pipe and the outer pipe due to an earthquake or the like.
第１図は、このような二重管の従来の中間固定
構造を示したものである。 FIG. 1 shows a conventional intermediate fixing structure of such a double pipe.
この二重管の中間固定構造は、本管１の外周に
円板を溶接してフランジ２を形成し、このフラン
ジに外管３を溶接することによつて本管１と外管
３とをほぼ同心に配設し、かつ本管１の外周に保
温材４を巻き付けて、本管１の断熱を図つてい
る。そして、この二重管では、外管３の周面にア
スフアルト５をコーテイングすることによつて外
管３の防蝕を図り、フランジ２を外管１から外方
へ突出させ、その突出部をコンクリート６で覆つ
て、このコンクリートを外管３に拘束させ、二重
管を土中に埋設した際に、該コンクリートによつ
て二重管を土中に拘束させるようにしている。 This intermediate fixed structure of the double pipe is achieved by welding a disc to the outer periphery of the main pipe 1 to form a flange 2, and by welding the outer pipe 3 to this flange, the main pipe 1 and the outer pipe 3 are connected. They are arranged almost concentrically, and a heat insulating material 4 is wrapped around the outer periphery of the main pipe 1 to insulate the main pipe 1. In this double pipe, the outer pipe 3 is coated with asphalt 5 on its circumferential surface to prevent corrosion, and the flange 2 is made to protrude outward from the outer pipe 1, and the protruding part is covered with concrete. 6, the concrete is restrained by the outer pipe 3, and when the double pipe is buried in the soil, the double pipe is restrained in the soil by the concrete.
ところで、このような従来の熱供給二重管で
は、本管１内を輸送される熱流体の熱が本管１、
フランジ２を介して外管３に伝達されるために、
固定部における断熱性能が極端に悪くなり、また
フランジ２の熱は、コンクリート６内の水分を蒸
発させ、コンクリート６の強度を低下させる虞れ
があり、その場合には必要固定強度が保てなくな
る。さらに外管３に伝達された熱は、アスフアル
ト５を溶かし、その部分で外管３の腐蝕を招来す
る虞れがあつた。さらにまた、この二重管では、
本管１と外管３とが鋼製フランジ２によつて互に
結合されているため、電蝕防止範囲が広くなり、
電蝕防止費用も嵩んでいた。
By the way, in such a conventional heat supply double pipe, the heat of the thermal fluid transported in the main pipe 1 is transferred to the main pipe 1,
To be transmitted to the outer tube 3 via the flange 2,
The heat insulation performance of the fixed part will be extremely poor, and the heat of the flange 2 will evaporate the moisture in the concrete 6, potentially reducing the strength of the concrete 6, and in that case, the necessary fixing strength will not be maintained. . Furthermore, the heat transferred to the outer tube 3 melted the asphalt 5, and there was a risk that the outer tube 3 would corrode in that area. Furthermore, in this double pipe,
Since the main pipe 1 and the outer pipe 3 are connected to each other by the steel flange 2, the range of protection against electrolytic corrosion is widened.
The cost of preventing electrolytic corrosion was also high.
この考案は、上述した問題点を解決するために
なされたものであつて、この考案の埋設熱供給二
重管の中間固定構造は、本管の外周面に、外管の
内周面に対して間隔をあけて突設された鋼製の本
管側固定板と、前記固定板を軸方向両側から挾み
込むように、前記本管側固定板の両側面にそれぞ
れ接して前記本管に配設された、その外周面に絶
縁シートを有する耐圧縮性断熱材と、前記外管の
内周面に、前記耐圧縮性断熱材の前記本管側固定
板に対して反対側の面に前記耐圧縮性断熱材を挾
むように、前記耐圧縮性断熱材に絶縁シートを介
して接し、かつ前記本管の外周面に対して間隔を
あけて配設された鋼製の外管側固定板とからなる
ことに特徴を有するものである。
This invention was made in order to solve the above-mentioned problems, and the intermediate fixing structure of the buried heat supply double pipe of this invention is attached to the outer peripheral surface of the main pipe against the inner peripheral surface of the outer pipe. A steel main pipe side fixing plate protruding at intervals, and a steel plate attached to the main pipe in contact with both sides of the main pipe side fixing plate so as to sandwich the fixing plate from both sides in the axial direction. a compression-resistant heat insulating material having an insulating sheet on its outer circumferential surface; A steel outer pipe-side fixing plate that is in contact with the compression-resistant heat insulating material via an insulating sheet so as to sandwich the compression-resistant heat insulating material, and is spaced apart from the outer peripheral surface of the main pipe. It is characterized by the following.
この考案によれば、本管の固定板と外管の固定
板とが、耐圧縮性断熱材を介して互いに規制し合
うから、本管と外管との軸方向への相対移動が阻
止される。そして、本管と外管とが耐圧縮性断熱
材を介して、これらの半径方向の結合がなされて
いるので、本管と外管とは、熱的に完全に遮断さ
れている。従つて、本管内を輸送される熱流体の
熱損失がほとんどない。更に、断熱材と外管との
間には、絶縁シートが介在されているので、本管
と外管とは、電気的にも完全に遮断されている。
従つて、電蝕対策を外管のみに施せばすむ。
According to this invention, the fixing plate of the main pipe and the fixing plate of the outer pipe restrict each other through the compression-resistant insulation material, so relative movement in the axial direction between the main pipe and the outer pipe is prevented. Ru. Since the main pipe and the outer pipe are connected in the radial direction via the compression-resistant heat insulating material, the main pipe and the outer pipe are completely thermally isolated. Therefore, there is almost no heat loss of the thermal fluid transported within the main pipe. Furthermore, since an insulating sheet is interposed between the heat insulating material and the outer tube, the main tube and the outer tube are completely electrically isolated.
Therefore, countermeasures against electrolytic corrosion only need to be applied to the outer tube.
この考案の一実施態様を図面を参照しながら説
明する。
An embodiment of this invention will be described with reference to the drawings.
第２図は、この考案に係る埋設熱供給二重管の
中間固定構造を示した縦断面図であり、第３図
は、そのＡ−Ａ線断面図、第４はＢ−Ｂ線断面図
である。 Fig. 2 is a vertical cross-sectional view showing the intermediate fixing structure of the buried heat supply double pipe according to this invention, Fig. 3 is a cross-sectional view taken along the line A-A, and Fig. 4 is a cross-sectional view taken along the line B-B. It is.
図面に示したように、この考案の二重管の中間
固定構造では、熱流体を輸送する本管１１と外管
１２が耐圧縮性断熱材１３を介して互に拘束され
ている。本管１１には、その外周面に、リブ１４
ａによつて互に結合された鋼製の円板１４ｂ，１
４ｂが溶接されて本管側固定板１４が形成されて
いる。そして、この固定板１４は、外管１２の内
周面と適宜な間隔が保たれている。耐圧縮性断熱
材１３は、キヤスタブル耐火物、バーミキユライ
等からなり、本管１１の外周の、固定板１４の軸
方向両側に、円板１４ｂにそれぞれ接して配設さ
れている。そして、この断熱材１３の外周面に
は、四フツ化エチレン樹脂等の絶縁シート１５が
巻き付けられ、その外周面に、該シートを固縛す
る支承帯１６が巻き付けられている。 As shown in the drawings, in the double pipe intermediate fixed structure of this invention, a main pipe 11 and an outer pipe 12 for transporting thermal fluid are restrained to each other via a compression-resistant heat insulating material 13. The main pipe 11 has ribs 14 on its outer peripheral surface.
steel discs 14b, 1 connected to each other by a
4b is welded to form the main pipe side fixing plate 14. The fixing plate 14 is maintained at an appropriate distance from the inner circumferential surface of the outer tube 12. The compression-resistant heat insulating material 13 is made of castable refractory, vermiculite, or the like, and is disposed on both sides of the fixed plate 14 in the axial direction on the outer periphery of the main pipe 11, in contact with the disk 14b. An insulating sheet 15 made of polytetrafluoroethylene resin or the like is wrapped around the outer circumferential surface of the heat insulating material 13, and a support band 16 for securing the sheet is wrapped around the outer circumferential surface.
一方、外管12には、その内周面に、外管側固定
板１７が形成されている。この固定板１７は、鋼
製の環状帯板１７ａと円板１７ｂを溶接等によつ
て一体に結合し、さらにリブ１７ｃによつてそれ
らの結合をより強固にしたもので、円板１７ｂを
断熱材１３の本管１１の固定板１４の側と反対の
側に位置させ、断熱材１３の面に絶縁シート１８
を介して当接するように外管１２に固定されてい
る。そして、この固定板１７には、円板１７ｂの
中心に、本管１１の外径より十分に大きな穴が形
成され、固定板１７と本管１１との間に十分な間
隔が保たれている。前記した絶縁シート１８は、
前記絶縁シート１５と同様に四フツ化エチレン樹
指等によつて形成されている。さらに、外管１２
の外周面には、その全長に亘つて、ポリエチレン
ライニング１９が施されている。なお、図中符号
２０は本管１１のほぼ全長に亘つて、その外周に
配設された保温材である。 On the other hand, an outer tube side fixing plate 17 is formed on the inner peripheral surface of the outer tube 12. This fixing plate 17 is made by joining an annular steel band plate 17a and a disk 17b together by welding or the like, and further strengthens the connection with ribs 17c, so that the disk 17b is insulated. The insulation sheet 18 is placed on the side of the main pipe 11 opposite to the fixed plate 14 of the insulation material 13, and the insulation sheet 18 is placed on the side of the insulation material 13.
The outer tube 12 is fixed to the outer tube 12 so as to be in contact with the outer tube 12 via the outer tube 12. A hole that is sufficiently larger than the outer diameter of the main pipe 11 is formed in the center of the disk 17b in the fixed plate 17, and a sufficient distance is maintained between the fixed plate 17 and the main pipe 11. . The insulating sheet 18 described above is
Like the insulating sheet 15, it is made of tetrafluoroethylene resin or the like. Furthermore, the outer tube 12
A polyethylene lining 19 is provided on the outer circumferential surface of the tube over its entire length. Note that the reference numeral 20 in the figure is a heat insulating material disposed around the outer periphery of the main pipe 11 over almost the entire length thereof.
このように、構成された本管１１は、その支承
帯１６の外周面に等間隔をもつて配設した円筒状
支持材２１を介して外管１２の内周面に載置され
る。 The main pipe 11 configured in this manner is placed on the inner circumferential surface of the outer tube 12 via the cylindrical supports 21 arranged at equal intervals on the outer circumferential surface of the support band 16.
したがつて、このように設置された二重管では
本管１１の固定板１４と外管１２の固定板１７と
が、耐圧縮性断熱材１３を介して互に規制し合
い、本管１１と外管１２の軸方向への相対移動が
阻止される。また、この二重管では、本管１１と
外管１２とが耐圧縮性断熱材１３を介して、それ
らの半径方向の結合がなされているので、本管１
１と外管１２とは熱的に遮断されており、加え
て、断熱材１３と外管１２との間に絶縁シート１
５，１８が介在されており、本管１１と外管１２
とは電気的にも完全に遮断されている。さらに、
この二重管では、上方に位置する支持材２１を外
管１２の内周面に接触することなく本管１１を外
管１２に載置させているので、この空間で、本管
１１等の熱膨張部分を吸収することができる。 Therefore, in the double pipe installed in this way, the fixing plate 14 of the main pipe 11 and the fixing plate 17 of the outer pipe 12 restrict each other via the compression-resistant heat insulating material 13, and the main pipe 11 Relative movement of the outer tube 12 in the axial direction is prevented. In addition, in this double pipe, the main pipe 11 and the outer pipe 12 are connected in the radial direction via the compression-resistant heat insulating material 13, so that the main pipe
1 and the outer tube 12 are thermally isolated, and in addition, an insulating sheet 1 is provided between the heat insulating material 13 and the outer tube 12.
5 and 18 are interposed, and the main pipe 11 and the outer pipe 12
It is completely electrically isolated. moreover,
In this double pipe, the main pipe 11 is placed on the outer pipe 12 without the supporting member 21 located above coming into contact with the inner circumferential surface of the outer pipe 12, so the main pipe 11 etc. can be placed in this space. It can absorb thermal expansion.
なお、上記実施例では、本管１１の固定板１４
および外管１２の固定板１７を円板によつて形成
しているが、これらは必ずしも円板でなくてもよ
く、要は耐圧縮性断熱材１３を受け止める形状で
あればよく、例えば本管１１および外管１２の周
面に等間隔に分割した状態に突出片を配設しても
よい。 In addition, in the above embodiment, the fixing plate 14 of the main pipe 11
Although the fixing plate 17 of the outer tube 12 is formed of a disk, these do not necessarily have to be disks, and may have any shape as long as they can receive the compression-resistant heat insulating material 13, for example, the main tube. 11 and the outer tube 12 may be provided with protruding pieces divided at equal intervals.
以上説明したように、この考案によれば、本管
と外管との熱絶縁が完全なので、輸送される熱流
体の熱損失がほとんどなく、外管の温度が高くな
らないので、外管にポリエチレンライニング等の
耐蝕性に富んだ被覆を施こすことができ、それに
よつて耐久性のある二重管を得ることができ、さ
らに本管と外管との電気的絶縁が完全なので、電
蝕対策を外管のみに施せばよく、したがつて電蝕
防止費用も少なくて済む。
As explained above, according to this invention, the thermal insulation between the main pipe and the outer pipe is perfect, so there is almost no heat loss of the thermal fluid being transported, and the temperature of the outer pipe does not rise. It is possible to apply a highly corrosion-resistant coating such as lining, which makes it possible to obtain a durable double pipe.Furthermore, since the electrical insulation between the main pipe and the outer pipe is complete, it is a countermeasure against electrolytic corrosion. It is only necessary to apply this to the outer tube, and therefore the cost for preventing electrolytic corrosion can be reduced.
第１図は従来の埋設熱供給二重管の中間固定構
造を示した縦断面図、第２図はこの考案の埋設熱
供給二重管の中間固定構造を示した縦断面図、第
３図は第２図におけるＡ−Ａ線断面図、第４図は
第２図におけるＢ−Ｂ線断面図である。図面にお
いて、
１１……本管、１２……外管、１３……耐圧縮
性断熱材、１４……本管側固定板、１４ａ……リ
ブ、１４ｂ……円板、１５……絶縁シート、１６
……支承帯、１７……外管側固定板、１７ａ……
環状帯板、１７ｂ……円板、１７ｃ……リブ、１
８……絶縁シート、１９……ポリエチレンライニ
ング、２０……保温材、２１……円筒状支持材。
Fig. 1 is a vertical sectional view showing the intermediate fixing structure of a conventional buried heat supply double pipe, Fig. 2 is a longitudinal sectional view showing the intermediate fixing structure of the buried heat supply double pipe of this invention, and Fig. 3 2 is a cross-sectional view taken along the line A-A in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line B-B in FIG. In the drawings, 11... Main pipe, 12... Outer pipe, 13... Compression-resistant heat insulating material, 14... Main pipe side fixing plate, 14a... Rib, 14b... Disk, 15... Insulating sheet, 16
...Support band, 17...Outer tube side fixing plate, 17a...
Annular band plate, 17b...disc, 17c...rib, 1
8... Insulating sheet, 19... Polyethylene lining, 20... Heat insulating material, 21... Cylindrical support material.
Claims (1)
あけて突設された鋼製の本管側固定板と、前記固
定板を軸方向両側から挾み込むように、前記本管
側固定板の両側面にそれぞれ接して前記本管に配
設された、その外周面に絶縁シートを有する耐圧
縮性断熱材と、前記外管の内周面に、前記耐圧縮
性断熱材の前記本管側固定板に対して反対側の面
に前記耐圧縮性断熱材を挾むように、前記耐圧縮
性断熱材に絶縁シートを介して接し、かつ前記本
管の外周面に対して間隔をあけて配設された鋼製
の外管側固定板とからなることを特徴とする埋接
熱供給二重管の中間固定構造。 A main pipe-side fixing plate made of steel is provided on the outer circumferential surface of the main pipe so as to protrude at a distance from the inner circumferential surface of the outer pipe; a compression-resistant heat insulating material having an insulating sheet on its outer circumferential surface, which is disposed on the main pipe in contact with both side surfaces of the tube-side fixing plate; and a compression-resistant heat insulating material on the inner circumferential surface of the outer tube. is in contact with the compression-resistant heat insulating material via an insulating sheet so as to sandwich the compression-resistant heat insulating material on the surface opposite to the main pipe side fixing plate, and is spaced apart from the outer peripheral surface of the main pipe. An intermediate fixed structure for a double buried heat supply pipe, characterized by comprising a fixed plate on the outer pipe side made of steel and arranged with an opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17470183U JPS6085682U (en) | 1983-11-14 | 1983-11-14 | Intermediate fixed structure of buried heat supply double pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17470183U JPS6085682U (en) | 1983-11-14 | 1983-11-14 | Intermediate fixed structure of buried heat supply double pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6085682U JPS6085682U (en) | 1985-06-13 |
| JPH025197Y2 true JPH025197Y2 (en) | 1990-02-07 |
Family
ID=30380264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17470183U Granted JPS6085682U (en) | 1983-11-14 | 1983-11-14 | Intermediate fixed structure of buried heat supply double pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6085682U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55110884U (en) * | 1979-01-29 | 1980-08-04 |
-
1983
- 1983-11-14 JP JP17470183U patent/JPS6085682U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6085682U (en) | 1985-06-13 |
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