JP4298996B2 - Pipe joint - Google Patents

Pipe joint Download PDF

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Publication number
JP4298996B2
JP4298996B2 JP2002378143A JP2002378143A JP4298996B2 JP 4298996 B2 JP4298996 B2 JP 4298996B2 JP 2002378143 A JP2002378143 A JP 2002378143A JP 2002378143 A JP2002378143 A JP 2002378143A JP 4298996 B2 JP4298996 B2 JP 4298996B2
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JP
Japan
Prior art keywords
pipe
connecting portion
collar
metal corrugated
corrugated 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 - Fee Related
Application number
JP2002378143A
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Japanese (ja)
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JP2004205018A (en
Inventor
泰和 梶間
淳 白木
Original Assignee
マルヤス工業株式会社
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Publication date
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Priority to JP2002378143A priority Critical patent/JP4298996B2/en
Publication of JP2004205018A publication Critical patent/JP2004205018A/en
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Publication of JP4298996B2 publication Critical patent/JP4298996B2/en
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Expired - Fee Related legal-status Critical Current

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  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、互いに離反しているパイプ間を連結する際、パイプ相互の位置関係に左右されず、過酷な環境下においても絶対的な信頼を確保できる管継ぎ手に関する。
【0002】
【従来の技術】
パイプ間を接続する簡易手段としてはゴムホースを利用した管継ぎ手が広く普及している。
ゴムホースを利用した管継ぎ手は、例えば図2に示すように、抜け止め加工されたパイプ1の先端部分をゴムホース8の端部に差し込んで、前記パイプ1が差し込まれた部分をカラー9を介してかしめ処理している。
しかしこのようなゴムホースによる管継ぎ手は、ゴムホースに高絶縁タイプを採用したとても、可燃性であるため火気は厳禁とされる。
又、ゴムの特性を考えると、組織を透過してしまう水素のような流体には不適当である。
そのような場合は、可撓性のある金属製のコルゲート管を金属製のメッシュホースで被覆した二重構造の複合管10で連結することになるが、その場合は図4に示すように専用の連結部材11によりパイプ(図示せず)に連結させる市販の管継ぎ手が利用されている。
【0003】
【発明が解決しようとする課題】
後者の管継ぎ手は、耐燃性で、水素などの流体を透過する虞れもないので、高い信頼性が得られるものの、可撓性に乏しく、自由度が少ないので、組み付け誤差によりパイプの位置がずれていると、そのずれを吸収できない不具合がある。又、前記複合管の連結には、専用の連結部材が必要となり、コストアップを招いてしまう。
更に、前者の管継ぎ手にもいえることであるが、内圧により膨張、伸びなどの変形を起こしやすいといった致命的な欠陥も指摘されている。
【0004】
そこで本発明は、ゴムホースに匹敵する可撓性を備え、耐燃性に富み、且つ水素などの流体を透過させない管継ぎ手の提供を目的とする。
【0005】
【課題を解決するための手段】
本発明は、パイプにおける連結部との境界部分に突条を形成すると共に、パイプの連結部に凹溝を周設し、その凹溝が周設された連結部を金属製コルゲートパイプの端部内に挿入してその金属製コルゲートパイプをパイプに接合し、前記金属製コルゲートパイプの外周を、非金属製のフレキシブル耐熱チューブにてパイプの連結部をカバーして突条の直前に至る範囲まで一体に被覆し、その非金属製のフレキシブル耐熱チューブにて被覆された連結部にカラーを、その端部に形成した係止部を突条に係止させた状態で外嵌し、そのカラーを八方プレスかしめ処理した管継ぎ手にある。
【0006】
前記管継ぎ手にあっては、連結部にOリング溝を周設し、そのOリング溝内に嵌着したOリングをパイプと金属製コルゲートパイプとの間に介在させたりすることができる。
【0007】
【発明の実施の形態】
以下に、本発明の実施形態を図面に基づいて説明する。
図1において、パイプ1の先端に設定した連結部Aには、パイプ1における連結部Aとの境界部分、即ち、連結部Aのエリア内で端部から最も離れた部位に突条2が、又、連結部Aの中間部分には凹溝3が、更に端部の近傍にはOリング溝4がそれぞれ周設され、Oリング溝4にはOリング4aが嵌着されている。
前記連結部Aは、金属製コルゲートパイプとしてのステンレス製薄肉コルゲートパイプ5の端部内に挿入され、そのステンレス製薄肉コルゲートパイプ5の先端とパイプ1の連結部Aとがロー付けにて接合されている。
このロー付け部位は、連結部Aのエリア内であれば特に限定されるものでなく、溶接、その他周知の接合手段を利用できる。
【0008】
前記ステンレス製薄肉コルゲートパイプ5は、その外周を非金属製のフレキシブル耐熱チューブ6にて被覆され、その非金属製のフレキシブル耐熱チューブ6は、パイプ1の連結部Aのエリアにまで及び、連結部Aに周設された突条2の直前まで一体に被覆されている。
前記非金属製のフレキシブル耐熱チューブとしては、例えばグラスファイバー製のブレードホースと称されるものが好適利用できる。
【0009】
前記非金属製フレキシブルチューブ6にて被覆された連結部Aにはカラー7が外嵌され、そのカラー7を、放射方向から加圧する八方かしめ処理することによって、パイプ1、ステンレス製薄肉コルゲートパイプ5、非金属製フレキシブルチューブ6の三者がしっかりと連結されている。
尚、前記カラー7には係止部7aが形成されていて、その係止部7aを突条2に係止させることによりカラー7の抜け止めが強化されている。
そのため金属製コルゲートパイプ5は、非金属製フレキシブルチューブ6によって外部から受ける様々な影響をシャットアウトされると共に、高い内圧に屈することもない。
【0010】
このように形成された管継ぎ手は、可撓性に富み、耐燃性や気密性にも優れ、高い内圧による変形も抑制されるので、過酷な条件下において好適利用できる。又、専用の連結部材を必要とせず、一般的なかしめ処理にて連結させることができる。
【0011】
そして前記実施の形態では、連結部にOリング溝を周設し、そのOリング溝内に嵌着したOリングをパイプと金属製コルゲートパイプとの間に介在させることによって、連結部におけるシール性を高め、又、カラーに係止部を設け、その係止部を連結部に形成された突条に係止させることで、カラーの抜け止め対策も完璧なものとしている。
【0012】
又、八方かしめの採用により、コストダウンを図るには有利といえる。
前記実施例は、金属製コルゲートパイプとしてステンレス製薄肉コルゲートパイプを採用しているが、可撓性を備えていれば、ステンレス以外の金属製であっても、又、多少厚肉であってもかまわない。
【0013】
【発明の効果】
以上詳述したように、本発明によれば、可撓性に富み、耐燃性や気密性にも優れ、高い内圧にも充分対応できるので、過酷な条件下において絶対的な信頼を確保できる。特に、カラーに係止部を設け、その係止部を連結部に形成された突条に係止させているので、カラーの抜け防止が強化される。
又、専用の連結部材を必要とせず、一般的なかしめ処理にて連結させることができる。
そしてパイプと金属製コルゲートパイプとの間にOリングを介在させれば、連結部におけるシール性を向上させることができる
【図面の簡単な説明】
【図1】本発明の一実施形態を示す説明図である。
【図2】従来例の説明図である。
【図3】従来例の説明図である。
【符号の説明】
1・・パイプ、2・・突条、3・・凹溝、4・・Oリング溝、4a・・Oリング、5・・ステンレス製薄肉コルゲートパイプ、6・・非金属製のフレキシブル耐熱チューブ、7・・カラー、7a・・係止部、8・・ゴムホース、9・・カラー、10・・複合管、11・・連結部材、A・・連結部。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint that can ensure absolute reliability even in a harsh environment without depending on the positional relationship between pipes when connecting pipes that are separated from each other.
[0002]
[Prior art]
As a simple means for connecting pipes, a pipe joint using a rubber hose is widely used.
For example, as shown in FIG. 2, a pipe joint using a rubber hose is inserted into the end of a rubber hose 8 at the tip of the pipe 1 that has been slipped off, and the part into which the pipe 1 is inserted is inserted through a collar 9. It is caulking.
However, such a pipe joint using a rubber hose is a highly inflammable rubber hose that is highly flammable, so fire is strictly prohibited.
Also, considering the properties of rubber, it is unsuitable for fluids such as hydrogen that penetrate tissue.
In such a case, a flexible metal corrugated pipe is connected by a double-structure composite pipe 10 covered with a metal mesh hose. In that case, as shown in FIG. A commercially available pipe joint that is connected to a pipe (not shown) by the connecting member 11 is used.
[0003]
[Problems to be solved by the invention]
The latter pipe joint is flame resistant and does not have the possibility of permeating hydrogen or other fluids, so it can be highly reliable, but it is not flexible and has a low degree of freedom. If it is shifted, there is a problem that the shift cannot be absorbed. Moreover, a dedicated connecting member is required for connecting the composite pipes, resulting in an increase in cost.
Furthermore, as can be said for the former pipe joint, a fatal defect that it is easy to cause deformation such as expansion and elongation due to internal pressure has been pointed out.
[0004]
Accordingly, an object of the present invention is to provide a pipe joint that has flexibility comparable to that of a rubber hose, has high flame resistance, and does not allow fluid such as hydrogen to permeate.
[0005]
[Means for Solving the Problems]
According to the present invention , a protrusion is formed at a boundary portion of a pipe with a connecting portion, a concave groove is provided around the connecting portion of the pipe, and the connecting portion provided with the concave groove is provided within an end portion of the metal corrugated pipe. The metal corrugated pipe is joined to the pipe, and the outer periphery of the metal corrugated pipe is integrated with the non-metallic flexible heat-resistant tube to cover the connecting portion of the pipe until just before the ridge. The collar is attached to the connecting part covered with the non-metallic flexible heat-resistant tube, and the collar is externally fitted with the locking part formed on the end part being locked to the ridge, and the collar is mounted on all sides. It is in a pipe joint that has been press caulked.
[0006]
In the pipe joint, an O-ring groove may be provided around the connecting portion, and an O-ring fitted in the O-ring groove may be interposed between the pipe and the metal corrugated pipe.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, the connecting portion A set at the tip of the pipe 1 has a protrusion 2 at a boundary portion with the connecting portion A in the pipe 1, that is, at a portion farthest from the end portion in the area of the connecting portion A. A concave groove 3 is provided in the middle portion of the connecting portion A, an O-ring groove 4 is provided in the vicinity of the end portion, and an O-ring 4 a is fitted in the O-ring groove 4.
The connecting portion A is inserted into the end of a stainless steel thin corrugated pipe 5 as a metal corrugated pipe, and the tip of the stainless thin corrugated pipe 5 and the connecting portion A of the pipe 1 are joined by brazing. Yes.
The brazing part is not particularly limited as long as it is within the area of the connecting part A, and welding or other known joining means can be used.
[0008]
The stainless steel thin corrugated pipe 5 is covered with a non-metallic flexible heat-resistant tube 6 on the outer periphery, and the non-metallic flexible heat-resistant tube 6 extends to the area of the connecting portion A of the pipe 1. It is integrally covered up to just before the ridge 2 provided around A.
As the non-metallic flexible heat-resistant tube, for example, a so-called glass fiber blade hose can be suitably used.
[0009]
A collar 7 is externally fitted to the connecting portion A covered with the non-metallic flexible tube 6, and the collar 7 is subjected to eight-side caulking treatment that pressurizes the collar 7 from the radial direction, thereby the pipe 1 and the stainless steel thin corrugated pipe 5. The three members of the non-metallic flexible tube 6 are firmly connected.
The collar 7 is formed with a locking portion 7a, and the locking portion 7a is locked to the protrusion 2 so that the collar 7 is prevented from coming off.
Therefore, the metal corrugated pipe 5 is shut out of various influences received from the outside by the non-metallic flexible tube 6 and does not yield to a high internal pressure.
[0010]
The pipe joint formed in this way is rich in flexibility, excellent in flame resistance and airtightness, and is suppressed from deformation due to a high internal pressure, so that it can be suitably used under severe conditions. Moreover, it is possible to connect by a general caulking process without requiring a dedicated connecting member.
[0011]
In the above-described embodiment, the O-ring groove is provided around the connecting portion, and the O-ring fitted in the O-ring groove is interposed between the pipe and the metal corrugated pipe, whereby the sealing performance at the connecting portion is achieved. In addition, a locking part is provided on the collar, and the locking part is locked to a protrusion formed on the connecting part, so that the collar is prevented from coming off.
[0012]
In addition, it can be said that adoption of Happo caulking is advantageous for reducing costs.
The embodiment employs a stainless steel thin corrugated pipe as the metal corrugated pipe, but it may be made of a metal other than stainless steel or may be somewhat thick as long as it has flexibility. It doesn't matter.
[0013]
【The invention's effect】
As described above in detail, according to the present invention, it is rich in flexibility, excellent in flame resistance and airtightness, and can sufficiently cope with a high internal pressure, so that absolute reliability can be ensured under severe conditions. In particular, the collar is provided with a locking portion, and the locking portion is locked to the protrusion formed on the connecting portion, so that the prevention of the collar from coming off is enhanced.
Moreover, it is possible to connect by a general caulking process without requiring a dedicated connecting member.
If an O-ring is interposed between the pipe and the metal corrugated pipe, the sealing performance at the connecting portion can be improved .
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a conventional example.
FIG. 3 is an explanatory diagram of a conventional example.
[Explanation of symbols]
1. ・ Pipe, 2. ・ Projection, 3. ・ Concave groove, 4. ・ O-ring groove, 4a ・ ・ O-ring, 5. ・ Stainless thin corrugated pipe made of stainless steel, 6. ・ Non-metallic flexible heat-resistant tube, 7. Collar, 7a ... Locking part, 8. Rubber hose, 9. Collar, 10. Composite pipe, 11. Connection member, A ... Connection part.

Claims (2)

互いに離反しているパイプ間を連結する管継ぎ手にあって、
パイプにおける連結部との境界部分に突条を形成すると共に、パイプの連結部に凹溝を周設し、その凹溝が周設された連結部を金属製コルゲートパイプの端部内に挿入してその金属製コルゲートパイプをパイプに接合し、前記金属製コルゲートパイプの外周を、非金属製のフレキシブル耐熱チューブにてパイプの連結部をカバーして突条の直前に至る範囲まで一体に被覆し、その非金属製のフレキシブル耐熱チューブにて被覆された連結部にカラーを、その端部に形成した係止部を突条に係止させた状態で外嵌し、そのカラーを八方プレスかしめ処理した管継ぎ手。
In a pipe joint that connects pipes that are separated from each other,
A protrusion is formed at the boundary portion of the pipe with the connecting portion, a concave groove is provided around the pipe connecting portion, and the connecting portion provided with the concave groove is inserted into the end portion of the metal corrugated pipe. The metal corrugated pipe is joined to the pipe, and the outer periphery of the metal corrugated pipe is integrally covered with a non-metallic flexible heat-resistant tube to cover the connecting portion of the pipe and immediately before the ridge , The collar was externally fitted to the connecting part covered with the non-metallic flexible heat-resistant tube with the locking part formed at the end being locked to the ridge, and the collar was subjected to press crimping on all sides. Pipe fitting.
連結部にはOリング溝を周設し、そのOリング溝内に嵌着したOリングをパイプと金属製コルゲートパイプとの間に介在させた請求項1に記載の管継ぎ手。  The pipe joint according to claim 1, wherein an O-ring groove is provided around the connecting portion, and an O-ring fitted into the O-ring groove is interposed between the pipe and the metal corrugated pipe.
JP2002378143A 2002-12-26 2002-12-26 Pipe joint Expired - Fee Related JP4298996B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002378143A JP4298996B2 (en) 2002-12-26 2002-12-26 Pipe joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002378143A JP4298996B2 (en) 2002-12-26 2002-12-26 Pipe joint

Publications (2)

Publication Number Publication Date
JP2004205018A JP2004205018A (en) 2004-07-22
JP4298996B2 true JP4298996B2 (en) 2009-07-22

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4586516B2 (en) * 2004-11-30 2010-11-24 横浜ゴム株式会社 Joining structure of metal flexible tube and connecting joint
JP4062325B2 (en) * 2005-07-14 2008-03-19 株式会社ニチリン Dissimilar metal pipe connection structure
JP5238347B2 (en) * 2008-05-15 2013-07-17 株式会社ニチリン Dissimilar metal pipe connection structure and joining method
JP2009281569A (en) * 2008-05-26 2009-12-03 Nichirin Co Ltd Connection structure of dissimilar metal pipes and connection method using the same

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