JP4808544B2 - Telescopic flexible pipe joint - Google Patents

Telescopic flexible pipe joint Download PDF

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JP4808544B2
JP4808544B2 JP2006132413A JP2006132413A JP4808544B2 JP 4808544 B2 JP4808544 B2 JP 4808544B2 JP 2006132413 A JP2006132413 A JP 2006132413A JP 2006132413 A JP2006132413 A JP 2006132413A JP 4808544 B2 JP4808544 B2 JP 4808544B2
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sleeve
seal ring
flexible pipe
pipe joint
pipes
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JP2007303548A (en
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田 信太郎 池
野 敏 成 中
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Victaulic Co of Japan Ltd
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Description

本発明は、埋設管路に使用した場合に、埋設部を掘削し、スリーブを分解することなくシールリングの交換を行うことができる伸縮可撓管継手に関する。   The present invention relates to an expansion / contraction flexible pipe joint that can excavate a buried portion and replace a seal ring without disassembling a sleeve when used in a buried pipeline.

地中に埋設される配管において、管路の連結は、管路の端部に設けたフランジ部同士をボルトナットの締結手段を用いて結合することで行われるのが一般的である。   In pipes buried in the ground, the pipes are generally connected by connecting flanges provided at the ends of the pipes using bolt and nut fastening means.

上記管路の連結構造は、管路の端部に設けたフランジ部同士を直接結合することで管路を連結しているので、地震等により配管に変位が発生した場合、配管に発生する変位がフランジ部を通して管路に伝わり、管路を破損させてしまい、配管からの流体の漏洩が発生してしまうという問題がある。   Since the pipe connection structure connects the pipes by directly connecting the flanges provided at the ends of the pipes, if the pipes are displaced due to an earthquake, etc., the displacements that occur in the pipes Is transmitted to the pipe line through the flange portion, causing damage to the pipe line and causing leakage of fluid from the pipe.

そこで、管路同士を直接連結するのではなく、接合すべき管路の間に伸縮可撓管継手を配置し、伸縮可撓管継手の具有する特性により地震等により発生する変位を吸収することで管路の破損を防ぐようにしている。   Therefore, rather than directly connecting the pipes, an expansion / contraction flexible pipe joint is arranged between the pipes to be joined, and the displacement caused by an earthquake or the like is absorbed by the characteristics of the expansion / contraction flexible pipe joint. In order to prevent damage to the pipeline.

従来から用いられている伸縮可撓管継手２０は、図２に示すように、接続すべき２つの管路端に固定された一対の管体２１，２１と、一対の管体２１，２１の端部を囲むように管体２１，２１の外側に配置された円筒形スリーブ２２と、円筒形スリーブ２２の端部内面と管体２１の外面との間に配置されたゴム製シールリング２３，２３と、円筒形スリーブ２２の両端部に突設された取付け部２４，２４と、各取付け部２４にボルトナット手段２５により取り付けられた押しリング２６，２６とから構成され、押しリング２６によりゴム製シールリング２３を押圧変形することで、円筒形スリーブ２２と管体２１との間を流体シールするようにしている。   As shown in FIG. 2, an expansion / contraction flexible pipe joint 20 conventionally used includes a pair of pipe bodies 21 and 21 fixed to two pipe ends to be connected, and a pair of pipe bodies 21 and 21. A cylindrical sleeve 22 disposed outside the tubular bodies 21 and 21 so as to surround the ends, and a rubber seal ring 23 disposed between the inner surface of the end of the cylindrical sleeve 22 and the outer surface of the tubular body 21; 23, mounting portions 24, 24 projecting from both ends of the cylindrical sleeve 22, and push rings 26, 26 attached to the respective mounting portions 24 by bolt and nut means 25. The seal ring 23 is pressed and deformed to fluidly seal between the cylindrical sleeve 22 and the tube body 21.

上記伸縮可撓管継手は、地中に埋設される配管に取り付けられ、シールリングによりスリーブと管体との間を封止しているので、シールリングを交換する場合、地中に埋設した管路の伸縮可撓管継手を含む部分の土を掘り起こし、伸縮可撓管継手を露出させる作業と、露出した伸縮可撓管継手を分解し、既設のシールリングをスリーブから取り外す作業と、新しいシールリングをそのまま管体の外面に装着することが難しいために、新しいシールリングを切断し、切断したシールリングを管体の外面に巻き付け、シールリングの切断面同士を接着してリング状とする組み立て作業とを必要とするので、多大の労力と時間を要するという問題がある。   The expansion / contraction flexible pipe joint is attached to a pipe buried in the ground and seals between the sleeve and the pipe body by a seal ring. Therefore, when replacing the seal ring, the pipe buried in the ground Digging up the soil of the part of the road that includes the expansion and contraction flexible pipe joint, exposing the expansion and contraction flexible pipe joint, disassembling the exposed expansion and contraction flexible pipe joint, removing the existing seal ring from the sleeve, and a new seal Because it is difficult to attach the ring directly to the outer surface of the tube, the new seal ring is cut, the cut seal ring is wrapped around the outer surface of the tube, and the cut surfaces of the seal ring are bonded together to form a ring This requires a lot of labor and time.

本発明は、上記した点を考慮してなされたもので、シールリングの交換を、従来のもののように、地中に埋設した伸縮可撓管継手を掘り起こし、伸縮可撓管継手を分解する作業を必要とすることなく、管体の内部から行うことができる伸縮可撓管継手を提供することを目的とする。   The present invention has been made in consideration of the above-described points, and the exchanging of the expansion and contraction flexible pipe joint is performed by excavating the expansion and contraction flexible pipe joint buried in the ground like the conventional one for replacement of the seal ring. It is an object of the present invention to provide an expansion / contraction flexible pipe joint that can be carried out from the inside of a pipe body without the need for the above.

本発明の伸縮可撓管継手は、接続すべき２つの管路端にそれぞれ固定された一対の管体と、一対の管体を橋絡するように一対の管体の内側に配置されたスリーブと、スリーブの両端部外面に形成された端面側を開口したシールリング空間と、スリーブのシールリング空間に配置されたシールリングと、スリーブのシールリング空間の端面開口を閉じるようにスリーブの端面に取り付けられた押しリングとから構成される。   The expansion / contraction flexible pipe joint of the present invention includes a pair of pipes fixed to two pipe ends to be connected, and a sleeve disposed inside the pair of pipes so as to bridge the pair of pipes. A seal ring space formed on the outer surface of both ends of the sleeve and having an open end face, a seal ring disposed in the seal ring space of the sleeve, and an end face of the sleeve so as to close the end face opening of the seal ring space of the sleeve. It consists of an attached push ring.

本発明によれば、シールリングの交換を、管体の内部で既設のシールリングをスリーブから取り外し、新しいシールリングをスリーブに装着することで行うことができるので、従来のもののように、管路に設けた縮可撓管継手を掘削し、伸縮可撓管継手を分解する必要がなく、しかも、新しいシールリングの装着も従来のようにシールリングを切断しスリーブに装着した後にシールリングの切断部を接着するという作業を必要としない。   According to the present invention, the seal ring can be replaced by removing the existing seal ring from the sleeve inside the tube and mounting a new seal ring on the sleeve. There is no need to dig the contracted flexible pipe joint and disassemble the expandable flexible pipe joint. In addition, the new seal ring can be installed after cutting the seal ring and attaching it to the sleeve as before. The work of bonding the parts is not required.

以下、本発明による伸縮可撓管継手の一実施形態について、添付の図面を参照しながら説明する。
本発明による伸縮可撓管継手１は、図１に示すように、図示しない接続すべき２つの管路の端部に一端をそれぞれ固定され、他端を互いに間隔を置くように配置された一対の管体２，２と、一対の管体２，２を橋絡するように一対の管体２，２の内側に配置された円筒形スリーブ３とを有する。 Hereinafter, an embodiment of an expansion / contraction flexible pipe joint according to the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, a telescopic flexible pipe joint 1 according to the present invention has a pair of one ends fixed to ends of two pipes to be connected (not shown) and the other ends arranged at intervals. Tube bodies 2 and 2 and a cylindrical sleeve 3 disposed inside the pair of tube bodies 2 and 2 so as to bridge the pair of tube bodies 2 and 2.

上記円筒形スリーブ３は、両端部に半径方向に突設した環状リブ４，４を有する。各環状リブ４は、端面に近い側面が傾斜面をなし、端面と反対側の側面が垂直面をなしている。スリーブは、環状リブ４より端側に端面側を開口した段部が形成している。そして、円筒形スリーブ３の両端面にそれぞれ押しリング５が取り付けられている。   The cylindrical sleeve 3 has annular ribs 4 and 4 projecting radially at both ends. As for each annular rib 4, the side surface close | similar to an end surface has comprised the inclined surface, and the side surface on the opposite side to an end surface has comprised the vertical surface. The sleeve is formed with a stepped portion having an end face opened to the end side from the annular rib 4. Push rings 5 are attached to both end faces of the cylindrical sleeve 3.

上記押しリング５は、円筒形スリーブ３に設けた環状リブ４の外径とほぼ同じ外径であり、押しリング５の環状リブ４に対向する面は、環状リブ４に設けた傾斜面に対向する傾斜面をなしている。そのため、円筒形スリーブ３は、環状リブ４と押しリング５，５との間に断面形状が底面が狭い台形の環状シールリング空間６を形成している。   The push ring 5 has an outer diameter substantially the same as the outer diameter of the annular rib 4 provided on the cylindrical sleeve 3, and the surface of the push ring 5 facing the annular rib 4 faces the inclined surface provided on the annular rib 4. It has an inclined surface. Therefore, the cylindrical sleeve 3 forms a trapezoidal annular seal ring space 6 having a narrow bottom surface in cross section between the annular rib 4 and the push rings 5 and 5.

上記円筒形スリーブ３は、両端面に周方向に間隔を置いたねじ孔７を有する。上記押しリング５は、円筒形スリーブ３に設けたねじ孔７に対応するように周方向に間隔を置いたボルト孔８を有する。押しリング５は、ボルト孔８がスリーブ３のねじ孔７に整合するようにスリーブ３の端面に配置され、ボルトナット手段９により円筒形スリーブ３の端面に取り付けられる。円筒形スリーブ３の環状リブ４と押しリング５，５との間に形成された環状シールリング空間６にゴム製シールリング１０が配置されている。   The cylindrical sleeve 3 has screw holes 7 at both end faces spaced in the circumferential direction. The push ring 5 has bolt holes 8 spaced in the circumferential direction so as to correspond to the screw holes 7 provided in the cylindrical sleeve 3. The push ring 5 is disposed on the end face of the sleeve 3 so that the bolt hole 8 is aligned with the screw hole 7 of the sleeve 3, and is attached to the end face of the cylindrical sleeve 3 by the bolt nut means 9. A rubber seal ring 10 is disposed in an annular seal ring space 6 formed between the annular rib 4 of the cylindrical sleeve 3 and the push rings 5 and 5.

上記ゴム製シールリング１０は、円筒形スリーブ３の環状シールリング空間６に配置された状態で、円筒形スリーブ３に取り付けられる押しリング５により押圧変形され、管体２の内面と円筒形状スリーブ３の外面の間を液密シールする。ゴム製シールリング１０は、半径方向の寸法の変形に対して、リップ部が追従するので、地震等により管路に変位が発生し、管路に偏心や曲がり発生しても、安定したシール性を確保することができる。   The rubber seal ring 10 is pressed and deformed by a push ring 5 attached to the cylindrical sleeve 3 in a state where the rubber seal ring 10 is disposed in the annular seal ring space 6 of the cylindrical sleeve 3, and the inner surface of the tubular body 2 and the cylindrical sleeve 3. A liquid-tight seal between the outer surfaces of The rubber seal ring 10 has a lip portion that follows the deformation in the radial direction. Therefore, even if a displacement occurs in the pipeline due to an earthquake or the like, and the eccentricity or bending occurs in the pipeline, stable sealing performance is achieved. Can be secured.

さらに、管体２の端部内面と円筒形スリーブ３の環状リブ４より内側の部位に環状空間１１が形成される、この環状空間１１に泥よけ材１２が配置されている。泥よけ材１２は、管体２の端部から円筒形スリーブ３の方向に泥が入らないようにしている。   Further, an annular space 11 is formed in the inner surface of the end portion of the tubular body 2 and the inner side of the annular rib 4 of the cylindrical sleeve 3, and a mudguard 12 is arranged in the annular space 11. The mudguard 12 prevents mud from entering the cylindrical sleeve 3 from the end of the tube 2.

本発明による伸縮可撓管継手１を配管の接合すべき管路の間に配置するには、管体２、２の一端を接続すべき２つの管路端にそれぞれ連結し、一対の管体２，２の他端を間隔を置くように位置させる。   In order to arrange the expansion / contraction flexible pipe joint 1 according to the present invention between pipes to which pipes are to be joined, one end of each of the pipes 2 and 2 is connected to two pipe ends to be connected, and a pair of pipes The other ends of 2 and 2 are positioned so as to be spaced apart.

つぎに、円筒形スリーブ３を、一対の管体２，２を橋絡するように一対の管体２，２の内側に配置する。   Next, the cylindrical sleeve 3 is arrange | positioned inside a pair of pipe bodies 2 and 2 so that a pair of pipe bodies 2 and 2 may be bridged.

つぎに、円筒形スリーブ３の両端部外面に形成された端面側を開口した環状シールリング空間６にゴム製シールリング１０を配置し、押しリング５を環状シールリング空間６を閉じるようにボルトナット手段９により円筒形スリーブ３の端面に取り付ける。環状シールリング空間６に配置されたゴム製シールリング１０は、押しリング５により押圧変形して、管体２の内面と円筒形スリーブ３の外面の間を液密シールする。   Next, a rubber seal ring 10 is disposed in an annular seal ring space 6 that is open on the end surface side formed on the outer surface of both ends of the cylindrical sleeve 3, and the push ring 5 is closed by a bolt nut so as to close the annular seal ring space 6. It is attached to the end face of the cylindrical sleeve 3 by means 9. The rubber seal ring 10 disposed in the annular seal ring space 6 is pressed and deformed by the push ring 5 to provide a liquid-tight seal between the inner surface of the tubular body 2 and the outer surface of the cylindrical sleeve 3.

つぎに、管体２の端部内面と円筒形スリーブ３の環状リブ４より内側の部位に形成される環状空間１１に泥よけ材１２を配置する。   Next, a mudguard 12 is disposed in an annular space 11 formed at the inner surface of the end of the tube body 2 and the annular rib 4 of the cylindrical sleeve 3.

本発明による伸縮可撓管継手１は、接合すべき管路の間に配置された後、通常の方法で地中に埋設される。   The expansion / contraction flexible pipe joint 1 according to the present invention is placed between pipes to be joined and then buried in the ground by a normal method.

本発明による伸縮可撓管継手１は、円筒形スリーブ３の両端に配置された管体２、２が円筒形スリーブ３に対して軸線方向に変動できるので、管路に地震等により発生する変位を吸収することができ、管路の破損を防ぐことができる。   In the expansion / contraction flexible pipe joint 1 according to the present invention, since the pipes 2 and 2 disposed at both ends of the cylindrical sleeve 3 can change in the axial direction with respect to the cylindrical sleeve 3, a displacement caused by an earthquake or the like in the pipe Can be absorbed, and damage to the pipeline can be prevented.

本発明による伸縮可撓管継手１のゴム製シールリング１０を交換するには、作業員が管路の内部に入り、ボルトナット手段９を押しリング５から取り外し、押しリング５を円筒形スリーブ３の端面から取り外す。   To replace the rubber seal ring 10 of the expansion / contraction flexible pipe joint 1 according to the present invention, an operator enters the inside of the pipe, removes the bolt / nut means 9 from the push ring 5, and removes the push ring 5 from the cylindrical sleeve 3. Remove from the end face.

つぎに、環状シールリング空間６に配置されたゴム製シールリング１０を円筒形スリーブ３の環状シールリング空間６の開口部を通して円筒形スリーブ３から取り外す。   Next, the rubber seal ring 10 disposed in the annular seal ring space 6 is removed from the cylindrical sleeve 3 through the opening of the annular seal ring space 6 of the cylindrical sleeve 3.

つぎに、新しいゴム製シールリング１０を環状シールリング空間６の開口部を通して円筒形スリーブ３の環状シールリング空間６に配置し、押しリング５をボルトナット手段９により円筒形スリーブ３の端面に取り付ける。新しいゴム製シールリング１０は、円筒形スリーブ３に取り付けられた押しリング５により押圧され、管体２の内面と円筒形スリーブ３の外面の間を液密シールする。   Next, a new rubber seal ring 10 is placed in the annular seal ring space 6 of the cylindrical sleeve 3 through the opening of the annular seal ring space 6, and the push ring 5 is attached to the end face of the cylindrical sleeve 3 by the bolt nut means 9. . The new rubber seal ring 10 is pressed by a push ring 5 attached to the cylindrical sleeve 3 to provide a liquid-tight seal between the inner surface of the tube 2 and the outer surface of the cylindrical sleeve 3.

このように、本発明による伸縮可撓管継手１は、掘削し、分解することなく、管路内における押しリング５の着脱作業によりゴム製シールリング１０を簡単に交換することができる。   Thus, the elastic flexible pipe joint 1 according to the present invention can easily replace the rubber seal ring 10 by excavating and disassembling the push ring 5 in the pipeline.

本発明による伸縮可撓管継手の縦断面図である。It is a longitudinal cross-sectional view of the expansion-contraction flexible pipe joint by this invention. 従来の伸縮可撓管継手の縦断面図である。It is a longitudinal cross-sectional view of the conventional expansion-contraction flexible pipe joint.

符号の説明Explanation of symbols

１ 本発明による伸縮可撓管継手
２ 管体
３ スリーブ
４ 環状リブ
５ 押しリング
６ シールリング空間
１０ シールリング DESCRIPTION OF SYMBOLS 1 Expandable flexible pipe joint by this invention 2 Tubing body 3 Sleeve 4 Annular rib 5 Push ring 6 Seal ring space 10 Seal ring

Claims (2)

接続すべき２つの管路端にそれぞれ固定された一対の管体と、一対の管体を橋絡するように一対の管体の内側に配置されたスリーブと、スリーブの両端部外面に形成された端面側を開口した環状空間と、スリーブの環状空間に配置されたシールリングと、スリーブの環状空間の端面開口を閉じるようにスリーブの端面にボルトナット手段によって取り付けられた押しリングとを有し、
前記シールリングは、リップ部を有し、前記押しリングにより押圧変形され前記管体の内面と前記スリーブの外面の間に接触して液密シールし、
前記シールリングが接触する前記管体の前記内面は、前記管体の軸方向に対し直線的に均一に形成されており、
前記スリーブの前記端面は前記スリーブの半径方向にある面であり、前記ボルトナット手段は、前記スリーブの軸方向に延びる内面よりも半径方向の位置に関してより外方において設けられている
ことを特徴とする伸縮可撓管継手。 A pair of pipes respectively fixed to two pipe ends to be connected, a sleeve disposed inside the pair of pipes so as to bridge the pair of pipes, and formed on outer surfaces of both ends of the sleeves an annular space of the end face is open and, possess a seal ring disposed in the annular space of the sleeve, and a press ring attached by bolts and nuts means on the end face of the sleeve so as to close the end face opening of the annular space of the sleeve ,
The seal ring has a lip portion, and is pressed and deformed by the push ring to contact between the inner surface of the tubular body and the outer surface of the sleeve, and liquid-tightly seals,
The inner surface of the tubular body with which the seal ring contacts is formed linearly and uniformly with respect to the axial direction of the tubular body,
The end surface of the sleeve is a surface in the radial direction of the sleeve, and the bolt and nut means are provided more outwardly with respect to a radial position than an inner surface extending in the axial direction of the sleeve. An expansion and contraction flexible pipe joint characterized by the above. スリーブと管体の端部との間に形成される環状空間に泥よけシール材を配置したことを特徴とする請求項１に記載の伸縮可撓管継手。   The expansion / contraction flexible pipe joint according to claim 1, wherein a mudguard seal material is disposed in an annular space formed between the sleeve and the end of the pipe body.
JP2006132413A 2006-05-11 2006-05-11 Telescopic flexible pipe joint Active JP4808544B2 (en)

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JP6419436B2 (en) * 2014-02-21 2018-11-07 日本鋳鉄管株式会社 Pipe joint structure
KR102344106B1 (en) * 2015-02-13 2021-12-27 니혼 빅토릭 가부시끼가이샤 Behavior exploration device and behavior exploration method of expansion and contraction flexible pipe joints
JP6498587B2 (en) * 2015-10-14 2019-04-10 日本ヴィクトリック株式会社 Expansion joint structure

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JPH0714478Y2 (en) * 1989-01-31 1995-04-10 三菱重工業株式会社 Inside fastening pipe fitting
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