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JP3814744B2 - Flexible pipe fittings - Google Patents
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JP3814744B2 - Flexible pipe fittings - Google Patents

Flexible pipe fittings Download PDF

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Publication number
JP3814744B2
JP3814744B2 JP04735997A JP4735997A JP3814744B2 JP 3814744 B2 JP3814744 B2 JP 3814744B2 JP 04735997 A JP04735997 A JP 04735997A JP 4735997 A JP4735997 A JP 4735997A JP 3814744 B2 JP3814744 B2 JP 3814744B2
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JP
Japan
Prior art keywords
flange
cylindrical
pipe joint
metal
flexible pipe
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
Application number
JP04735997A
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Japanese (ja)
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JPH10227381A (en
Inventor
兼芳 林
茂吉 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sankei Giken Co Ltd
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Sankei Giken Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to JP04735997A priority Critical patent/JP3814744B2/en
Publication of JPH10227381A publication Critical patent/JPH10227381A/en
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Publication of JP3814744B2 publication Critical patent/JP3814744B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、フランジ部の異常変形を防止する可撓性管継手に関する。
【0002】
【従来の技術】
可撓性管継手は、筒状部とその両端に設けられた接続用のフランジ部とを有する。そして、その両フランジ部が夫々地中に埋設される鋼管または鋳鉄管等のフランジ部に相フランジその他を介して締結固定されるものである。
このような可撓性管継手のフランジ部には、ピアノ線や環状金属板がそのフランジ部の補強のために埋設されている。
【0003】
【発明が解決しようとする課題】
地中埋設管は地盤の変化等でその軸線が移動し、そのために可撓性管継手の軸線が偏心したり、可撓性管継手に引っ張り荷重が加わることがしばしば起こる。すると、可撓性管継手のフランジ部の付け根が異常に変形し、それが元で亀裂を生じたり、接続部の液密性または気密性を損なう等、継手の寿命を縮める虞がある。
そこで、本発明は係る問題点を解決することを課題とする。
【0004】
【課題を解決するための手段】
本発明の可撓性管継手は、内部にタイヤコード1を有し、筒状部2の端部2aにフランジ部3が突設され、相フランジ5を介して金属管6のフランジ部6aに締結固定される可撓性管継手において、
前記筒状部2の端部2a内のみにその軸線に平行に埋設された短い筒状金属部4aと、前記フランジ部3内にそれに平行に埋設された環状金属板部4bとが断面L字状に一体化されて、それらの外周に前記タイヤコード1が巻付けられ、
前記筒状金属部4aの板厚が前記環状金属板部4bのそれより薄く形成され、
前記筒状部2の端部2a外周に相フランジ5内周嵌入用の環状凹部2bが形成され、
前記相フランジ5による前記締結固定の際に、その相フランジ5の内周面と筒状金属部4aの外周面との距離が、その筒状金属部4aの内周面と筒状部2aの内周面との距離より小さいと共に、その相フランジ5の端面とそれに対向する環状金属板部4bの一端面との距離が、環状金属板4bの他端面とフランジ部3の前記金属管6側端面との距離より小さくしたものである。
【0005】
【発明の実施の形態】
次に、図面に基づいて本発明の実施の形態を説明する。
図1は本発明の可撓性管継手の要部縦断面図であり、図2はその管継手の締結状態を示す要部縦断面図、図3はその管継手の全体的縦断面図の一例を示し、図4は同他の例を示す縦断面図である。
この可撓性管継手は、図3および図4に示す如く、継手の主要部を構成する筒状部2と、その両端に設けた一対のフランジ部3とを有する。そして、筒状部2の端部2a内のみにその軸線に平行に短い筒状金属部4aが埋設される。それと共に、フランジ部3内にそれと平行に環状金属板部4bが埋設され、その環状金属板部4bと筒状金属部4aとが溶接部9を介して断面L字状に一体化されている。なお、溶接部9を用いず筒状金属部4aと環状金属板部4bとを一体成形品で製作することも可能である。
【0006】
次に、本可撓性管継手の端部2aの外周には相フランジ5の内周嵌入用の環状凹部2bが形成される。
そして、筒状部2の内部にはタイヤコード1が埋設され、そのタイヤコード1の端部は筒状金属部4a,環状金属板部4bの外周を被蔽する。そして、そのタイヤコード1の内外周にはゴム材が配置され、常法により製造される。
このゴム材としては、例えばエチレン/プロピレンゴム,クロロプレーンゴム,ブチレンゴム,可撓性のクロロスルホン化ポリエチレンのような合成ゴムもしくはプラスチックゴム、または天然ゴムなどが使用できる。そして、補強用の前記タイヤコード1としては、ナオロン,ポリエチレン,アラミド(例えばデュポン社商標ケプラ)などが用いられると共に、金属線などが埋設されることもある。
【0007】
次に、可撓性管継手の直径は通常150mm〜2200mm程度のものが存在する。本発明は、これらの全ての可撓性管継手に適応できる。このとき、一例として環状金属板部4bの厚みは3mm〜20mm程度であり、筒状金属部4aの厚みは2mm〜6mm程度を用いることができる。勿論、使用場所および各種条件によりそれらの厚みは適宜設計変更される。
このような可撓性管継手としては、図3に示す如く、軸線が直線状のものであって、その筒状部2の中央部の直径が拡大したものあるいは筒状部2が全長に渡って同一半径に形成されたもの、さらには図4に示す如く、軸線が湾曲したエルボ型のものであってもよい。
【0008】
【使用方法】
図2〜図4に示す如く、夫々の金属管6のフランジ部6aと、本可撓性管継手のフランジ部3端面とを当接し、環状の相フランジ5,ボルト7,ナット8を介し、両者間を締結固定すればよい。このとき、相フランジ5とフランジ部6aとにより、環状金属板部4bが挟持される。この環状金属板部4bは、筒状金属部4aと一体に断面L字状に形成されているから、それらによりフランジ部3の付け根部の形状が保持される。そのため、可撓性管継手が偏心したり、捩じれたり、圧縮および引っ張り等により各種外力を受けても、締結部が異常変形することを防止できる。
【0009】
【発明の作用・効果】
本発明の可撓性管継手は、筒状金属部4aと環状金属板部4bとが断面L字状に一体化されて、それが管継手の筒状部2の端部2a内のみおよびフランジ部3内に埋設され、それらの外周にタイヤコード1が巻付けられたものであるから、金属管に締結固定された可撓性継手のフランジ部3の付け根部分が使用中に異常に変形するのを防止し、そこに応力が集中することを防ぎ、管継手と金属管との接続部分を安定して維持することができる。それにより、寿命が永く信頼性の高い可撓性管継手を提供し得る。しかも、そのフランジ部3を厚くして、金属管との締結力を高めることができる。
また、筒状部2の端部2a外周に相フランジ5の内周嵌入用の環状凹部2bが形成されているから、相フランジ5の内周面と筒状金属部4aとが近接し、それによって使用中に筒状金属部4aが変形するのをより効果的に防止できる。
さらに筒状金属部4aの板厚が環状金属板部4bのそれより薄く形成されているから、管継手の筒状部2を比較的薄く形成し、可撓性を向上すると共に、管継手の材料を少なくすることができる。
【図面の簡単な説明】
【図1】本発明の可撓性管継手の要部縦断面図。
【図2】本管継手の締結状態を示す要部縦断面図。
【図3】本管継手の全体的縦断面図。
【図4】同他の例を示す縦断面図。
【符号の説明】
1 タイヤコード
2 筒状部
2a 端部
2b 環状凹部
3 フランジ部
4a 筒状金属部
4b 環状金属板部
5 相フランジ
6 金属管
6a フランジ部
7 ボルト
8 ナット
9 溶接部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible pipe joint that prevents abnormal deformation of a flange portion.
[0002]
[Prior art]
A flexible pipe joint has a cylindrical part and the flange part for a connection provided in the both ends. Then, both the flange portions are fastened and fixed to flange portions such as steel pipes or cast iron pipes embedded in the ground via phase flanges or the like.
A piano wire and an annular metal plate are embedded in the flange portion of such a flexible pipe joint for reinforcement of the flange portion.
[0003]
[Problems to be solved by the invention]
The underground pipe is frequently moved due to changes in the ground, and therefore, the axis of the flexible pipe joint is often decentered or a tensile load is applied to the flexible pipe joint. Then, the base of the flange portion of the flexible pipe joint may be abnormally deformed, which may cause a crack in the original state, or reduce the liquid-tightness or airtightness of the connection portion.
Then, this invention makes it a subject to solve the problem which concerns.
[0004]
[Means for Solving the Problems]
The flexible pipe joint of the present invention has a tire cord 1 inside, a flange portion 3 projecting from an end portion 2 a of a tubular portion 2, and a flange portion 6 a of a metal tube 6 via a phase flange 5. In a flexible pipe joint to be fastened and fixed ,
A short cylindrical metal portion 4a embedded in the end portion 2a of the cylindrical portion 2 only in parallel to the axis thereof and an annular metal plate portion 4b embedded in the flange portion 3 in parallel thereto are L-shaped in cross section. And the tire cord 1 is wound around the outer periphery thereof,
The plate thickness of the cylindrical metal portion 4a is formed thinner than that of the annular metal plate portion 4b,
An annular recess 2b for fitting the inner periphery of the companion flange 5 is formed on the outer periphery of the end 2a of the cylindrical portion 2,
During the fastening and fixing by the companion flange 5, the distance between the inner peripheral surface of the companion flange 5 and the outer peripheral surface of the cylindrical metal portion 4a is such that the inner peripheral surface of the cylindrical metal portion 4a and the cylindrical portion 2a The distance between the end face of the companion flange 5 and the one end face of the annular metal plate portion 4b facing it is smaller than the distance from the inner peripheral surface, and the other end face of the annular metal plate 4b and the flange portion 3 on the metal tube 6 side. It is smaller than the distance from the end face .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an essential part of a flexible pipe joint of the present invention, FIG. 2 is a longitudinal sectional view of an essential part showing a fastening state of the pipe joint, and FIG. 3 is an overall longitudinal sectional view of the pipe joint. An example is shown, and FIG. 4 is a longitudinal sectional view showing another example.
As shown in FIGS. 3 and 4, the flexible pipe joint has a cylindrical part 2 constituting a main part of the joint and a pair of flange parts 3 provided at both ends thereof. And the short cylindrical metal part 4a is embed | buried only in the edge part 2a of the cylindrical part 2 in parallel with the axis line. At the same time, an annular metal plate portion 4b is embedded in the flange portion 3 in parallel therewith, and the annular metal plate portion 4b and the cylindrical metal portion 4a are integrated in an L-shaped cross section via the welded portion 9. . In addition, it is also possible to manufacture the cylindrical metal part 4a and the annular metal plate part 4b as an integrally molded product without using the welded part 9.
[0006]
Next, an annular recess 2b for fitting the inner periphery of the phase flange 5 is formed on the outer periphery of the end 2a of the flexible pipe joint.
And the tire cord 1 is embed | buried inside the cylindrical part 2, and the edge part of the tire cord 1 covers the outer periphery of the cylindrical metal part 4a and the cyclic | annular metal plate part 4b. And the rubber material is arrange | positioned in the inner periphery of the tire cord 1, and it manufactures by a conventional method.
As this rubber material, for example, ethylene / propylene rubber, chloroprene rubber, butylene rubber, synthetic rubber such as flexible chlorosulfonated polyethylene or plastic rubber, or natural rubber can be used. As the tire cord 1 for reinforcement, Naoron, polyethylene, aramid (for example, DuPont brand Kepla) or the like is used, and a metal wire or the like may be embedded.
[0007]
Next, the diameter of the flexible pipe joint is usually about 150 mm to 2200 mm. The present invention is applicable to all these flexible fittings. At this time, as an example, the thickness of the annular metal plate portion 4b is about 3 mm to 20 mm, and the thickness of the cylindrical metal portion 4a is about 2 mm to 6 mm. Of course, the thickness is appropriately changed depending on the place of use and various conditions.
As such a flexible pipe joint, as shown in FIG. 3, the axis is linear and the diameter of the central part of the cylindrical part 2 is enlarged or the cylindrical part 2 extends over the entire length. Further, it may be an elbow having a curved axis, as shown in FIG.
[0008]
【how to use】
As shown in FIGS. 2 to 4, the flange portion 6 a of each metal pipe 6 and the flange portion 3 end surface of the flexible pipe joint are brought into contact with each other through an annular phase flange 5, a bolt 7, and a nut 8. What is necessary is just to fasten and fix between both. At this time, the annular metal plate portion 4b is sandwiched between the companion flange 5 and the flange portion 6a. Since the annular metal plate portion 4b is formed integrally with the cylindrical metal portion 4a in an L-shaped cross section, the shape of the base portion of the flange portion 3 is maintained by them. Therefore, even if the flexible pipe joint is eccentric, twisted, or subjected to various external forces due to compression and tension, it is possible to prevent the fastening portion from being deformed abnormally.
[0009]
[Operation and effect of the invention]
In the flexible pipe joint of the present invention, the cylindrical metal part 4a and the annular metal plate part 4b are integrated into an L-shaped cross section, which is only in the end 2a of the cylindrical part 2 of the pipe joint and the flange. Since the tire cord 1 is wrapped around the outer periphery of the portion 3 and the outer periphery thereof is wound, the base portion of the flange portion 3 of the flexible joint fastened and fixed to the metal pipe is abnormally deformed during use. It is possible to prevent the stress from being concentrated there, and to stably maintain the connection portion between the pipe joint and the metal pipe. Thereby, a flexible pipe joint having a long lifetime and high reliability can be provided. And the flange part 3 can be thickened and the fastening force with a metal pipe can be heightened.
Further, since the annular recess 2b for the inner periphery fitting the mating flange 5 to the end portion 2a periphery of the cylindrical portion 2 is formed, the inner peripheral surface and the tubular metallic portion 4a of the mating flanges 5 are close, it Therefore, it is possible to more effectively prevent the cylindrical metal portion 4a from being deformed during use.
Since further the thickness of the tubular metal portion 4a is formed thinner than that of the annular metal plate portion 4b, together with a relatively thin tubular portion 2 of the pipe joint, to improve flexibility, the pipe joint The material can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of a flexible pipe joint of the present invention.
FIG. 2 is a longitudinal sectional view of an essential part showing a fastening state of a main pipe joint.
FIG. 3 is an overall longitudinal sectional view of a main pipe joint.
FIG. 4 is a longitudinal sectional view showing another example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tire cord 2 Cylindrical part 2a End part 2b Annular recessed part 3 Flange part 4a Cylindrical metal part 4b Annular metal plate part 5 Phase flange 6 Metal pipe 6a Flange part 7 Bolt 8 Nut 9 Welded part

Claims (1)

内部にタイヤコード1を有し、筒状部2の端部2aにフランジ部3が突設され、相フランジ5を介して金属管6のフランジ部6aに締結固定される可撓性管継手において、
前記筒状部2の端部2a内のみにその軸線に平行に埋設された短い筒状金属部4aと、前記フランジ部3内にそれに平行に埋設された環状金属板部4bとが断面L字状に一体化されて、それらの外周に前記タイヤコード1が巻付けられ、
前記筒状金属部4aの板厚が前記環状金属板部4bのそれより薄く形成され、
前記筒状部2の端部2a外周に相フランジ5内周嵌入用の環状凹部2bが形成され、
前記相フランジ5による前記締結固定の際に、その相フランジ5の内周面と筒状金属部4aの外周面との距離が、その筒状金属部4aの内周面と筒状部2aの内周面との距離より小さいと共に、その相フランジ5の端面とそれに対向する環状金属板部4bの一端面との距離が、環状金属板4bの他端面とフランジ部3の前記金属管6側端面との距離より小さくした可撓性管継手。
In a flexible pipe joint having a tire cord 1 inside, a flange portion 3 protruding from an end portion 2a of a cylindrical portion 2, and fastened and fixed to a flange portion 6a of a metal pipe 6 via a phase flange 5 ,
A short cylindrical metal portion 4a embedded only in the end portion 2a of the cylindrical portion 2 in parallel to the axis thereof, and an annular metal plate portion 4b embedded in the flange portion 3 in parallel thereto are L-shaped in cross section. And the tire cord 1 is wound around the outer periphery thereof,
The plate thickness of the cylindrical metal portion 4a is formed thinner than that of the annular metal plate portion 4b,
An annular recess 2b for fitting the inner periphery of the companion flange 5 is formed on the outer periphery of the end 2a of the cylindrical portion 2,
When the fastening by the companion flange 5 is performed, the distance between the inner peripheral surface of the companion flange 5 and the outer peripheral surface of the tubular metal portion 4a is such that the inner peripheral surface of the tubular metal portion 4a and the tubular portion 2a. The distance between the end surface of the companion flange 5 and the one end surface of the annular metal plate portion 4b opposite to the distance from the inner peripheral surface is smaller than the other end surface of the annular metal plate 4b and the metal tube 6 side of the flange portion 3 Flexible pipe joint that is smaller than the distance to the end face .
JP04735997A 1997-02-13 1997-02-13 Flexible pipe fittings Expired - Lifetime JP3814744B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04735997A JP3814744B2 (en) 1997-02-13 1997-02-13 Flexible pipe fittings

Publications (2)

Publication Number Publication Date
JPH10227381A JPH10227381A (en) 1998-08-25
JP3814744B2 true JP3814744B2 (en) 2006-08-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5684517B2 (en) * 2010-09-13 2015-03-11 倉敷化工株式会社 Flexible joint
JP7060987B2 (en) * 2018-03-16 2022-04-27 倉敷化工株式会社 How to wind the flexible pipe and its reinforcing cord

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