JP7449056B2 - 曲管 - Google Patents
曲管 Download PDFInfo
- Publication number
- JP7449056B2 JP7449056B2 JP2019165102A JP2019165102A JP7449056B2 JP 7449056 B2 JP7449056 B2 JP 7449056B2 JP 2019165102 A JP2019165102 A JP 2019165102A JP 2019165102 A JP2019165102 A JP 2019165102A JP 7449056 B2 JP7449056 B2 JP 7449056B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- tube
- pipe
- short
- resin
- 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.)
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Links
- 239000000835 fiber Substances 0.000 claims description 33
- 229920005989 resin Polymers 0.000 claims description 29
- 239000011347 resin Substances 0.000 claims description 29
- 238000005452 bending Methods 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
2 積層部(管外面側)
3 積層部(管内面側)
M 布状繊維層
C 織物繊維層
Claims (2)
- 少なくとも一端面が管軸方向に対して傾斜した複数のFRPM製で呼び径が900mm以上の短管を、曲管状となるように端面どうしを突き合わせた状態で接合した曲管において、
繊維と樹脂とで形成される積層部が、少なくとも前記短管の隣り合う2つの接合部を含
む部位の管外面全体および管内面全体に設けられており、前記積層部の管内面側の厚みが管外面側の厚みよりも小さく、前記積層部全体の厚みが前記短管の厚みの0.3~1倍とされ、
前記積層部は、ガラスマットまたはコンティニュアスマットに樹脂含浸させた布状繊維層を短管外面の最内層とし、その最内層の外側にガラスクロスまたはロービングクロスに樹脂含浸させた織物繊維層と前記布状繊維層とを交互に5層以上に積層したものであることを特徴とする曲管。 - 前記短管の厚みと前記積層部の厚みとを合計した管厚は、前記積層部が設けられる部位
の円周方向曲げ剛性または円周方向抵抗曲げモーメントのいずれかが、JDPA規格G3
004「K形ダクタイル鋳鉄管」で規定される同口径の管厚のダクタイル鋳鉄管の、JD
PA技術資料T32「農業用水用ダクタイル鉄管管路 設計と施工」に記載された曲げ強
さおよび弾性係数を用いて計算した円周方向曲げ剛性または円周方向抵抗曲げモーメント
と同等以上となるように設定されていることを特徴とする請求項1に記載の曲管。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019165102A JP7449056B2 (ja) | 2019-09-11 | 2019-09-11 | 曲管 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019165102A JP7449056B2 (ja) | 2019-09-11 | 2019-09-11 | 曲管 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021042810A JP2021042810A (ja) | 2021-03-18 |
JP7449056B2 true JP7449056B2 (ja) | 2024-03-13 |
Family
ID=74861651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019165102A Active JP7449056B2 (ja) | 2019-09-11 | 2019-09-11 | 曲管 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP7449056B2 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005121062A (ja) | 2003-10-15 | 2005-05-12 | Kubota Corp | Frpm管の接合構造 |
JP2015140867A (ja) | 2014-01-29 | 2015-08-03 | 株式会社栗本鐵工所 | 繊維強化プラスチック製曲管 |
JP2018035827A (ja) | 2016-08-30 | 2018-03-08 | 積水化学工業株式会社 | 曲管 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0645757Y2 (ja) * | 1989-03-15 | 1994-11-24 | 積水化学工業株式会社 | 樹脂複合管継手 |
JPH068390Y2 (ja) * | 1989-05-11 | 1994-03-02 | 日立化成工業株式会社 | Frp製管状体の接続構造 |
-
2019
- 2019-09-11 JP JP2019165102A patent/JP7449056B2/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005121062A (ja) | 2003-10-15 | 2005-05-12 | Kubota Corp | Frpm管の接合構造 |
JP2015140867A (ja) | 2014-01-29 | 2015-08-03 | 株式会社栗本鐵工所 | 繊維強化プラスチック製曲管 |
JP2018035827A (ja) | 2016-08-30 | 2018-03-08 | 積水化学工業株式会社 | 曲管 |
Also Published As
Publication number | Publication date |
---|---|
JP2021042810A (ja) | 2021-03-18 |
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