JPH02173490A - Asphalt buried pipe - Google Patents
Asphalt buried pipeInfo
- Publication number
- JPH02173490A JPH02173490A JP63323499A JP32349988A JPH02173490A JP H02173490 A JPH02173490 A JP H02173490A JP 63323499 A JP63323499 A JP 63323499A JP 32349988 A JP32349988 A JP 32349988A JP H02173490 A JPH02173490 A JP H02173490A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- asphalt
- cross
- linked polyethylene
- buried
- 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
- 239000010426 asphalt Substances 0.000 title abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 17
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 17
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000010622 cold drawing Methods 0.000 abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 3
- 239000004698 Polyethylene Substances 0.000 abstract 2
- -1 polyethylene Polymers 0.000 abstract 2
- 229920000573 polyethylene Polymers 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000004132 cross linking Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 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
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はロードヒーティング用の温水配管として用いら
れるアスファルト埋設配管に関し、特にプラスチックと
金属を複合化して熱による座屈変形を無くしたものであ
る。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to asphalt buried piping used as hot water piping for road heating, and in particular, to a piping buried in asphalt that is made of a composite of plastic and metal to eliminate buckling deformation due to heat. be.
〔従来の技術および発明が解決しようとする課題〕従来
ロードヒーティングのための温水配管としては通常ナイ
ロン系や架橋ポリエチレン系のパイプが使用されている
。これはこのようなパイプは継ぎ目がなく水漏れの心配
がないこと、および曲げ加工性や耐食性に優れるため施
工し易いことなどの理由によるものである。[Prior Art and Problems to be Solved by the Invention] Conventionally, nylon-based or cross-linked polyethylene-based pipes have been used as hot water piping for road heating. This is because such pipes have no joints, so there is no risk of water leakage, and they are easy to construct due to their excellent bendability and corrosion resistance.
しかし架橋ポリエチレン管はアスファル！・中に埋設す
る際の施工時の温度１３０〜１６０℃において熱による
座屈を生じて変形してしまう。このため架橋ポリエチレ
ン管を用いる場合はアスファルト施工は実施できず、コ
ンクリート施工となるためコスト的に割高となってしま
う。However, cross-linked polyethylene pipe is asphalt!・Buckling occurs due to heat at the construction temperature of 130 to 160°C when embedding the product, resulting in deformation. For this reason, when using cross-linked polyethylene pipes, asphalt construction cannot be carried out, but concrete construction is required, which results in higher costs.
一方ナイロン系のパイプは上記アスファルト施工温度に
は耐えるが、パイプ自体が架橋ポリエチレンに比べて高
価であるという欠点を持っている。On the other hand, nylon pipes can withstand the above-mentioned asphalt construction temperatures, but have the disadvantage that the pipes themselves are more expensive than cross-linked polyethylene.
また銅や低炭素鋼管が稀に用いられることもあるが、金
属単体のパイプでは土壌による電食や腐食で貫通孔を生
じたり、パイプの内側に発生するスケールのために目詰
まり現象を起こす等の欠点があった。In addition, copper or low carbon steel pipes are occasionally used, but pipes made of only metal may develop through holes due to electrolytic corrosion or corrosion caused by soil, or may become clogged due to scale forming inside the pipe. There was a drawback.
本発明はこれに鑑み種々検討の結果、安価で耐食性、耐
熱性、施工性に優れたアスファルト埋設配管を開発した
ものである。In view of this, as a result of various studies, the present invention has developed an asphalt buried pipe that is inexpensive and has excellent corrosion resistance, heat resistance, and workability.
即ち本発明は架橋ポリエチレン管の外側に金属管を被覆
したことを特徴とするものである。That is, the present invention is characterized in that the outside of the crosslinked polyethylene pipe is coated with a metal pipe.
このように内側のパイプとして架橋ポリエチレン管を用
い、その外側にアルミニウムや鋼管等の金属管を使用す
る構造としたのは、以下に示すように両者の長所を生か
した複合管が得られるからである。即ちアスファルト施
工温度での架橋ポリエチレン管の座屈変形に対抗する強
度は耐熱性の良好な金属管に持たせ、金属にとっては腐
食環境である温水の流れる内側の材質は耐食性の良好な
架橋ポリエチレンとしたことに特徴が存するものである
。The reason for this structure is that a cross-linked polyethylene pipe is used as the inner pipe and a metal pipe such as aluminum or steel pipe is used on the outside because a composite pipe can be obtained that takes advantage of the advantages of both, as shown below. be. In other words, a metal pipe with good heat resistance has the strength to withstand the buckling deformation of a cross-linked polyethylene pipe at the asphalt construction temperature, and the material on the inside through which hot water flows, which is a corrosive environment for metal, is made of cross-linked polyethylene with good corrosion resistance. It is characterized by the fact that it did so.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
〈実施例１〉
第１図に示すように外径２０ｍｍ、肉厚１．５ｍｍの架
橋ポリエチレン管（１）の外側に、外径２２．２ｎ＋ｍ
。<Example 1> As shown in FIG.
.
肉厚０．８ｍｍでＪＩＳ Ｈ４０８０に規定されたＡ３
００３アルミニウム合金管（２）を被せた後、冷間引抜
法により架橋ポリエチレン管（」）の外側にアルミニウ
ム合金管（２）を密着させて被覆した複合管を製作した
。なお冷間引抜後の外径は２１゜６ｍｍ肉厚は２．３ｍ
ｍであった。A3 specified by JIS H4080 with a wall thickness of 0.8 mm
After covering the tube with the 003 aluminum alloy tube (2), a composite tube was manufactured by covering the cross-linked polyethylene tube ('') with the aluminum alloy tube (2) in close contact with the outside by cold drawing. The outer diameter after cold drawing is 21°6mm and the wall thickness is 2.3m.
It was m.
この複合管をＵベンド加工後、架橋ポリエチレン単体か
らなる外径２１．６ｍｍ、 肉厚２．３ｍｍのパイプと
共に１３０〜１６０°Ｃの温度のアスファルト中に埋設
して、座屈変形の大きさを比較した。After U-bending this composite pipe, it was buried in asphalt at a temperature of 130 to 160°C, along with a pipe made of cross-linked polyethylene with an outer diameter of 21.6 mm and a wall thickness of 2.3 mm, to reduce the magnitude of buckling deformation. compared.
その結果架橋ポリエチレン単体のパイプは熱の影響を受
けてほぼ偏平に変形してしまった。As a result, the cross-linked polyethylene pipe became almost flat due to the influence of heat.
これに対して本発明の複合管は同−断面内の最大外径値
と最少外径値との差で表した真円度は０、５ｍｍ以下で
あり、アスファルト埋設前と変わっておらず変形しない
ことが確認された。On the other hand, the roundness of the composite pipe of the present invention, expressed as the difference between the maximum and minimum outside diameters in the same cross section, is 0.5 mm or less, and is unchanged from before being buried in asphalt and deformed. It was confirmed that it does not.
〈実施例２〉
第１図に示すように外径１．３．０ｍｍ、肉厚１．０ｍ
ｍの架橋ポリエチレン管（１）の外側に、外径１５．０
ｍｍ肉厚０．７ｍｍでＪＩＳ １１３３００に規定され
た［”、１２２０銅合金管（２”）を被せた後、冷間引
抜法により架橋ポリエチレン管（１）の外側に銅合金管
（２′）を密着させて被覆した複合管を製作した。なお
冷間引抜後の外径は１４．４ｍｍ、 肉厚は１．７ｍｍ
であった。<Example 2> As shown in Fig. 1, the outer diameter is 1.3.0 mm and the wall thickness is 1.0 m.
m cross-linked polyethylene pipe (1) with an outer diameter of 15.0
After covering a 1220 copper alloy tube (2'') with a wall thickness of 0.7 mm specified in JIS 113300, a copper alloy tube (2') is placed on the outside of the cross-linked polyethylene tube (1) by cold drawing. We fabricated a composite tube that was closely coated with The outer diameter after cold drawing is 14.4 mm, and the wall thickness is 1.7 mm.
Met.
この複合管をＵベンド加工後、架橋ポリエチレン単体か
らなる外径１４．４ｍｍ、肉厚１．７ｍｍのパイプと共
に１３０〜１６０°Ｃの温度のアスファルト中に埋設し
て、座屈変形の大きさを比較した。After U-bending this composite pipe, it was buried in asphalt at a temperature of 130 to 160°C along with a pipe made of cross-linked polyethylene with an outer diameter of 14.4 mm and a wall thickness of 1.7 mm, to reduce the magnitude of buckling deformation. compared.
その結果架橋ポリエチレン単体のパイプは熱の影響を受
けてほぼ偏平に変形してしまった。As a result, the cross-linked polyethylene pipe became almost flat due to the influence of heat.
これに対して本発明の複合管は同−断面内の最大外径値
と最少外径値との差で表した真円度は０、３ｍｍ以下で
あり、アスファルト埋設前と変わっておらず変形しない
ことが確認された。On the other hand, the roundness of the composite pipe of the present invention, expressed as the difference between the maximum and minimum outside diameters in the same cross section, is 0.3 mm or less, and is unchanged from before being buried in asphalt and deformed. It was confirmed that it does not.
このように本発明によれば、アスファルトに埋設しても
変形を生ずることなく、さらに管内側にスケール等の発
生がなく、曲げ加工性に優れ、ナイロン単体のパイプよ
り安価である等顕著な効果を奏するものである。As described above, according to the present invention, there is no deformation even when buried in asphalt, there is no generation of scale etc. on the inside of the pipe, it has excellent bending workability, and it has remarkable effects such as being cheaper than a pipe made of only nylon. It is something that plays.
第１図は本発明の一実施例を示す側断面図である。 ■−＝架橋ポリエチレン管 ２−アルミニウム合金管 ２”＝−銅合金管 FIG. 1 is a side sectional view showing one embodiment of the present invention. ■-=Cross-linked polyethylene pipe 2-Aluminum alloy tube 2”=-copper alloy tube
Claims (1)
とを特徴とするアスファルト埋設配管。(1) An asphalt-buried pipe characterized by having a metal pipe coated on the outside of a cross-linked polyethylene pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63323499A JPH02173490A (en) | 1988-12-23 | 1988-12-23 | Asphalt buried pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63323499A JPH02173490A (en) | 1988-12-23 | 1988-12-23 | Asphalt buried pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02173490A true JPH02173490A (en) | 1990-07-04 |
Family
ID=18155371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63323499A Pending JPH02173490A (en) | 1988-12-23 | 1988-12-23 | Asphalt buried pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02173490A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542199A (en) * | 2013-10-27 | 2014-01-29 | 何鹏 | Composite coating pipe |
| CN112301287A (en) * | 2020-11-09 | 2021-02-02 | 江苏省沙钢钢铁研究院有限公司 | Prestressed steel strand, wire rod for prestressed steel strand and production method of wire rod |
-
1988
- 1988-12-23 JP JP63323499A patent/JPH02173490A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542199A (en) * | 2013-10-27 | 2014-01-29 | 何鹏 | Composite coating pipe |
| CN112301287A (en) * | 2020-11-09 | 2021-02-02 | 江苏省沙钢钢铁研究院有限公司 | Prestressed steel strand, wire rod for prestressed steel strand and production method of wire rod |
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