JP2009156380A - Pipe fitting - Google Patents

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JP2009156380A
JP2009156380A JP2007336596A JP2007336596A JP2009156380A JP 2009156380 A JP2009156380 A JP 2009156380A JP 2007336596 A JP2007336596 A JP 2007336596A JP 2007336596 A JP2007336596 A JP 2007336596A JP 2009156380 A JP2009156380 A JP 2009156380A
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pipes
pipe
thermal expansion
pipe joint
stainless steel
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Makoto Taniwatari
誠 谷渡
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Mitsubishi Heavy Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe fitting which simplifies tube connecting work easily and reliably even for long tubes, enables sure connection using temperature differences in a connection environment, and reduces man-hours for the connection, in the pipe fitting connecting two pipes in the longitudinal direction. <P>SOLUTION: The pipe fitting connecting two pipes in the longitudinal direction is characterized by coupling one-end sides of the two pipes using threads, providing a third pipe formed of a material having a larger coefficient of thermal expansion than those of the two pipes on the other end side, sandwiching the third pipe between the two pipes, and fastening the respective seal surfaces of the two pipes and the third pipe by tightening the screws. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、２つの管を長手方向に接続する管継手であって、特に管材の熱膨張率の差を用いて２つの管を気体密に結合すことを特徴とする管継手に関する。   The present invention relates to a pipe joint that connects two pipes in the longitudinal direction, and particularly relates to a pipe joint characterized in that two pipes are gas-tightly coupled using a difference in thermal expansion coefficient of pipe materials.

図７には、ガス採取管の接合部の構造を示す。該ガス採取管は、長尺の管を途中で連結部３００で結合しながら、深さ方向に延設している。該ガス採取管２００の連結部３００は、２つの管１及び２はステンレス鋼材からなり、一方側の管２に設けられたネジ０４を矢印のように動かして、他方側の管１に設けられたネジ０３に螺合して、長尺の管を次々と形成している。   FIG. 7 shows the structure of the joint of the gas sampling tube. The gas sampling pipe extends in the depth direction while joining a long pipe with a connecting portion 300 in the middle. The connecting portion 300 of the gas sampling pipe 200 is provided in the pipe 1 on the other side by moving the screws 04 provided on the one side pipe 2 as shown by the arrows. A long tube is formed one after another by screwing with the screw 03.

前記図７に示すガス採取管２００は、図６のように水平面２１から一定深さに亘って埋設される。即ち、ガス管挿入用の挿入口２０から、連結部３００にて結合しながら、次々と深相部に埋設している。   The gas sampling pipe 200 shown in FIG. 7 is embedded from the horizontal plane 21 to a certain depth as shown in FIG. That is, the gas pipe is inserted in the deep phase portion one after another while being connected by the connecting portion 300 from the insertion port 20 for inserting the gas pipe.

尚、特許文献１（特開２００４−３４７０２０号公報）の図9には、２つの管を長手方向に接続する管継手において、筒体の内周に、前記２つの管の管端部を間隔を存して設置し、各管端部の外周と筒体の内周との間に、シール用の部材を介装している。   In FIG. 9 of Patent Document 1 (Japanese Patent Laid-Open No. 2004-347020), in a pipe joint that connects two pipes in the longitudinal direction, the pipe ends of the two pipes are spaced apart from each other on the inner periphery of the cylinder. And a sealing member is interposed between the outer periphery of each tube end and the inner periphery of the cylindrical body.

特開２００４−３４７０２０号公報JP 2004-347020 A

しかしながら、図７に示されるガス採取管２００は、深さ方向に延設した長尺の管を途中の連結部３００で、ネジ連結しながら長尺の管を次々と形成しているが、かかる作業箇所は地中の狭いスペース２２で行うため、管の連結作業が、２人以上でないと困難で、作業性が悪く、多くの工数を必要とする。
また、作業中に、連結部３００の構成部材が落下することがあり得る。 However, the gas sampling pipe 200 shown in FIG. 7 forms long pipes one after another while connecting the long pipes extending in the depth direction with the connecting part 300 in the middle, with screws. Since the work location is performed in a narrow space 22 in the ground, it is difficult to connect the pipes with two or more people, the workability is poor, and a large number of man-hours are required.
In addition, the constituent members of the connecting part 300 may fall during the operation.

本発明はかかる従来技術の課題に鑑み、２つの管を長手方向に接続する管継手において、長尺の管でも容易に且つ確実に管の接続作業を簡単化し、且つ接続環境での温度差を利用して接続を確実にし、接続工数を低減した管継手を提供することを目的とする。   In view of the problems of the prior art, the present invention provides a pipe joint that connects two pipes in the longitudinal direction, and easily and reliably simplifies the pipe connection work even with long pipes, and reduces the temperature difference in the connection environment. The purpose is to provide a pipe joint that ensures connection and reduces connection man-hours.

本発明はかかる目的を達成するもので、２つの管を長手方向に接続する管継手において、前記２つの管の一端側をネジで結合し、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設け、前記２つの管の間に前記第３の管を挟持して、前記ネジを締め込むことにより前記２つの管と第３の管の両シール面を締着することを特徴とする（請求項１）。   The present invention achieves such an object. In a pipe joint for connecting two pipes in the longitudinal direction, one end side of the two pipes is coupled with a screw, and the other end side has a thermal expansion coefficient higher than that of the two pipes. A third tube made of a large material is provided, the third tube is sandwiched between the two tubes, and the screws are tightened to tighten the seal surfaces of the two tubes and the third tube. (Claim 1).

また、本発明は、次のように構成することもできる。
（１）２つの管よりも熱膨張率の小さい材料からなる筒体の内周に、前記２つの管の管端部を当接させて設置し、前記筒体の両端内周に互いに逆ネジを設け、前記２つの管の管端部外周にそれぞれ互いに逆ネジを設け、前記２つの逆ネジを螺合することにより前記２つの管の前記シール面を気体密に結合する（請求項２）。 The present invention can also be configured as follows.
(1) The pipe ends of the two pipes are placed in contact with the inner circumference of the cylinder made of a material having a smaller coefficient of thermal expansion than the two pipes, and the opposite ends of the pipe are screwed to each other on the inner circumference. And the two pipes are screwed to each other so that the sealing surfaces of the two pipes are gas-tightly coupled to each other (Claim 2). .

（２）２つの管の一端側をネジで結合し、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設け、前記２つの管の間に前記第３の管を挟持して、前記ネジを締め込むことにより前記２つの管と第３の管の両シール面を締着するように構成された外周結合部と、
２つの小径管よりも熱膨張率の小さい材料からなる筒体の内周に、前記２つの小径管の管端部を当接させて設置し、前記筒体の両端内周に互いに逆ネジを設け、前記２つの小径管の管端部外周にそれぞれ互いに逆ネジを設け、前記２つの逆ネジを螺合することにより前記２つの小径管の前記シール面を気体密に結合するように構成された内周結合部を、前記外周結合部の内周に前記内周結合部を互いに同心に二重管式に形成する（請求項３）。 (2) One end side of two pipes is coupled with a screw, and a third pipe made of a material having a higher coefficient of thermal expansion than the two pipes is provided on the other end side, and the third pipe is provided between the two pipes. An outer peripheral coupling part configured to clamp the pipes and fasten both the sealing surfaces of the two pipes and the third pipe by tightening the screws;
The pipe ends of the two small-diameter pipes are placed in contact with the inner circumference of the cylinder made of a material having a smaller coefficient of thermal expansion than the two small-diameter pipes, and reverse screws are attached to both inner circumferences of the cylinder. And provided with reverse screws on the outer circumferences of the pipe end portions of the two small-diameter pipes, and by screwing the two reverse screws, the sealing surfaces of the two small-diameter pipes are coupled in a gas-tight manner. The inner peripheral coupling part is formed in a double pipe type concentrically with each other on the inner periphery of the outer peripheral coupling part.

（３）筒体の内周に前記２つの管の管端部を当接させて設置し、該２つの管の管端部の外周に前記２つの管よりも熱膨張率の大きい材料からなる線材を複数巻巻装し、前記筒体の両端部によって前記２つの管を締着することにより前記当接部を気体密に結合する（請求項４）。   (3) The tube ends of the two tubes are placed in contact with the inner periphery of the cylindrical body, and the outer periphery of the tube ends of the two tubes is made of a material having a higher coefficient of thermal expansion than the two tubes. A plurality of wires are wound, and the two pipes are fastened by both end portions of the cylindrical body, whereby the contact portion is gas-tightly coupled (Claim 4).

（４）筒体の内周に、前記２つの管の管端部にベローズを介在させて該管端部を対向させて設置し、前記筒体の両端部を前記２つの管の外周に設けた溝に嵌合して前記筒体と前記２つの管を連結する（請求項５）。   (4) On the inner circumference of the cylinder, the pipe ends of the two pipes are placed with the bellows interposed therebetween so that the pipe ends face each other, and both ends of the cylinder are provided on the outer circumferences of the two pipes. The cylindrical body and the two pipes are connected to each other by fitting in a groove (Claim 5).

本発明は、前記２つの管の一端側をネジで結合し、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設け、前記２つの管の間に前記第３の管を挟持して、前記ネジを締め込むことにより前記２つの管と第３の管の両シール面を締着するので（請求項１）、２つの管の一端側をネジ好ましくは巻き数の少ないネジを設け、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設けて、前記ネジを締め込むことにより、前記２つの管と第３の管の両シール面を締着することによって、熱膨張率の大きい材料の熱膨張によって前記２つの管と第３の管の両シール面を押し付ける力が発生し、また２つの管の一端側に設けたネジの締付け力との協働によって、２つの管の接合部は確実に連結される。   In the present invention, one end side of the two pipes is coupled with a screw, and a third pipe made of a material having a higher coefficient of thermal expansion than the two pipes is provided on the other end side, and the third pipe is interposed between the two pipes. Since both the sealing surfaces of the two tubes and the third tube are fastened by sandwiching the three tubes and tightening the screw (Claim 1), one end side of the two tubes is preferably wound around the screw. By providing a small number of screws, providing a third tube made of a material having a higher thermal expansion coefficient than the two tubes on the other end side, and tightening the screws, the two tubes and the third tube By fastening both the seal surfaces, a force is generated to press both the seal surfaces of the two tubes and the third tube due to thermal expansion of the material having a large coefficient of thermal expansion, and it is provided on one end side of the two tubes. The joint of the two tubes is securely connected by cooperation with the tightening force of the screw.

また、２つの管よりも熱膨張率の小さい材料からなる筒体の内周に、前記２つの管の管端部を当接させて設置し、前記筒体の両端内周に互いに逆ネジを設け、前記２つの管の管端部外周にそれぞれ互いに逆ネジを設け、前記２つの逆ネジを螺合することにより前記２つの管の前記シール面を気体密に結合したので（請求項２）、筒体の内周に設けた２つの管の管端部を当接させてシール面を設置し、２つの逆ネジを螺合することにより、２つの管のシール面を気体密に結合したので、２つの逆ネジの締付け力と２つの管のシール面の熱膨張による押付力によって、２つの管の接合部は気体密に確実に連結される。   In addition, the pipe ends of the two pipes are placed in contact with the inner circumference of the cylinder made of a material having a smaller coefficient of thermal expansion than the two pipes, and reverse screws are attached to the inner circumferences of both ends of the cylinder. Since the two pipes are screwed to each other, and the sealing surfaces of the two pipes are gas-tightly connected to each other by providing the reverse screws on the outer circumferences of the pipe ends of the two pipes (Claim 2). The sealing surfaces of the two tubes provided on the inner periphery of the cylindrical body are brought into contact with each other, and the sealing surfaces of the two tubes are gas-tightly coupled by screwing two reverse screws. Therefore, the joint of the two tubes is securely connected in a gas-tight manner by the tightening force of the two reverse screws and the pressing force due to the thermal expansion of the seal surfaces of the two tubes.

また、前記請求項１の発明と請求項２の発明とを組み合わせた請求項３の発明によれば、
内周結合部の内部を流体の通路とし、該内周結合部の外側を外周結合部で覆うので、内周結合部をアルミニウム管で構成して内部を流体が通過するように構成すれば、外周結合部をＳＵＳ管で構成しても外周結合部に流体が流れるのを回避でき、強固な外周結合部でアルミニウム管などの内周結合部を保護できる。 According to the invention of claim 3 that combines the invention of claim 1 and the invention of claim 2,
Since the inside of the inner peripheral coupling portion is used as a fluid passage and the outer periphery of the inner peripheral coupling portion is covered with the outer peripheral coupling portion, the inner peripheral coupling portion is formed of an aluminum tube so that the fluid passes through the inside. Even if the outer peripheral coupling portion is formed of a SUS pipe, it is possible to avoid the flow of fluid to the outer peripheral coupling portion, and the inner peripheral coupling portion such as an aluminum tube can be protected by the strong outer peripheral coupling portion.

また、筒体の内周に前記２つの管の管端部を当接させて設置し、該２つの管の管端部の外周に前記２つの管よりも熱膨張率の大きい材料からなる線材を複数巻巻装し、前記筒体の両端部によって前記２つの管を締着することにより前記当接部を気体密に結合されば（請求項４）、筒体の内周に２つの管の管端部を当接させて設置し、前記２つの管よりも熱膨張率の大きい材料からなる線材を複数巻巻装することにより、熱膨張率の大きい材料線材によって、２つの管の熱膨張により当接部が圧設され、気体密に確実に連結される。   Also, a wire rod made of a material having a thermal expansion coefficient larger than that of the two tubes on the outer periphery of the tube ends of the two tubes, which is installed by bringing the tube ends of the two tubes into contact with the inner periphery of the cylindrical body. If the abutment part is gas-tightly coupled by fastening the two pipes at both ends of the cylindrical body (Claim 4), two pipes are provided on the inner periphery of the cylindrical body. The two tube ends are brought into contact with each other, and a plurality of wires made of a material having a higher coefficient of thermal expansion than the two tubes are wound, so that the heat of the two tubes can be increased by the material wire having a higher coefficient of thermal expansion. The contact portion is pressed by the expansion and is securely connected in a gas-tight manner.

また、筒体の内周に、２つの管の管端部にベローズを介在させて該管端部を対向させて設置し、前記筒体の両端部を前記２つの管の外周に設けた溝に嵌合して前記筒体と前記２つの管を連結したので（請求項５）、ベローズを介在させたことにより、２つの管の熱膨張を吸収できるとともに、ベローズ部分を折り畳むことにより、容易に格納できる。   In addition, a groove provided on the inner circumference of the cylinder with the bellows interposed between the pipe ends of the two pipes so that the pipe ends face each other, and both ends of the cylinder provided on the outer circumference of the two pipes Since the cylindrical body and the two pipes are connected with each other (Claim 5), the thermal expansion of the two pipes can be absorbed by interposing the bellows, and the bellows portion can be easily folded. Can be stored.

以上により、本発明によれば、作業者が低温環境下で管の連結部を連結し、その後かかる連結部を前記低温環境下よりも高温の高温環境下に移動すれば、前記２つの環境下での熱膨張差によって該連結部に自動的に締め付け力が生起されて接続が確実となる。また、１人の作業員で、長尺の管でも２つの管の接合作業が容易にでき、また作業中に連結部の構成部材が落下することも回避でき、これにより長尺の管でも容易に且つ確実に管の接続作業ができ、接続工数を低減した管継手を提供できる。   As described above, according to the present invention, if the worker connects the connecting portion of the pipe in a low temperature environment and then moves the connecting portion to a high temperature environment higher than the low temperature environment, the two environments Due to the difference in thermal expansion, a tightening force is automatically generated in the connecting portion, and the connection is ensured. In addition, a single worker can easily join two pipes even with a long pipe, and can prevent the components of the connecting part from dropping during the work. In addition, it is possible to reliably connect pipes and provide a pipe joint with reduced connection man-hours.

以下、本発明を図に示した実施例を用いて詳細に説明する。但し、この実施例に記載されている構成部品の寸法、材質、形状、その相対配置などは特に特定的な記載がない限り、この発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。   Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

図１は、本発明の第１実施例を示す管継手の連結部の断面図である。
図１において、管継手１００はステンレス管１とステンレス管２とを接合して構成され、
前記ステンレス管２の内周にステンレス管１を嵌合し、該嵌合部の端部をネジ４で結合している。該ネジ４は太いネジで１山〜２山程度が螺合している。７はガス通路である。 FIG. 1 is a cross-sectional view of a connecting portion of a pipe joint showing a first embodiment of the present invention.
In FIG. 1, a pipe joint 100 is configured by joining a stainless pipe 1 and a stainless pipe 2,
The stainless steel tube 1 is fitted to the inner periphery of the stainless steel tube 2, and the ends of the fitting part are coupled with screws 4. The screw 4 is a thick screw and about 1 to 2 threads are screwed together. 7 is a gas passage.

該ネジ４の他端側には、前記ステンレス管１とステンレス管２よりも熱膨張率の大きいアルミニム管３が、前記ステンレス管１の端部５とステンレス管２の内面６との間に挟持されている。該端部５とステンレス管２の内面６にてシール面を構成している。
従って、前記ネジ４を締め込むことにより、前記ステンレス管１の端部５とステンレス管２の内面６の両シール面が締着される。 On the other end side of the screw 4, an aluminum tube 3 having a higher coefficient of thermal expansion than the stainless tube 1 and the stainless tube 2 is sandwiched between the end portion 5 of the stainless tube 1 and the inner surface 6 of the stainless tube 2. Has been. The end 5 and the inner surface 6 of the stainless steel tube 2 constitute a sealing surface.
Accordingly, by tightening the screw 4, both the sealing surfaces of the end portion 5 of the stainless steel tube 1 and the inner surface 6 of the stainless steel tube 2 are fastened.

かかる第１実施例によれば、ステンレス管１とステンレス管２の一端側をネジ４好ましくは巻き数も少ないネジ４に形成し、他端側にステンレス管１とステンレス管２よりも熱膨張率の大きい材料からなるアルミニム管３を設けて、前記ネジ４を締め込むことにより、前記ステンレス管１とステンレス管２とアルミニム管３の両シール面５，６を締着することにより、熱膨張率の大きいアルミニム管３の熱膨張によって、前記ステンレス管１及びステンレス管２とアルミニム管３の両シール面５，６を押し付ける力が発生し、またステンレス管１とステンレス管２の一端側に設けたネジ４の締付け力との協働によって、ステンレス管１とステンレス管２の連結部は確実に連結される。   According to the first embodiment, one end side of the stainless steel tube 1 and the stainless steel tube 2 is formed into the screw 4, preferably the screw 4 having a smaller number of turns, and the other end side has a thermal expansion coefficient than that of the stainless steel tube 1 and the stainless steel tube 2. By providing the aluminum tube 3 made of a large material and tightening the screws 4, the seal surfaces 5 and 6 of the stainless steel tube 1, the stainless steel tube 2 and the aluminum tube 3 are fastened, so that the thermal expansion coefficient is obtained. Due to the thermal expansion of the large aluminum tube 3, a force to press the seal surfaces 5 and 6 of the stainless steel tube 1, the stainless steel tube 2, and the aluminum tube 3 is generated, and provided on one end side of the stainless steel tube 1 and the stainless steel tube 2. By the cooperation with the tightening force of the screw 4, the connecting portion of the stainless steel pipe 1 and the stainless steel pipe 2 is securely connected.

図２は、本発明の第２実施例を示す管継手の連結部の断面図である。
図２において、この第２実施例においては、管継手２００を、２本のアルミニム管８，９をシール面１３で突き合せている。
そして、該アルミニム管８，９よりも熱膨張率の小さい材料からなるステンレス管１２で該２本のアルミニム管８，９を覆い、前記２本のアルミニム管８，９の管端部外周にそれぞれ互いに逆ネジ１０，１１を設け、前記２つの逆ネジ１０，１１を螺合することにより前記２本のアルミニム管８，９の前記シール面１３を気体密に結合している。７はガス通路である。 FIG. 2 is a cross-sectional view of a connecting portion of a pipe joint showing a second embodiment of the present invention.
In FIG. 2, in the second embodiment, the pipe joint 200 is abutted against the two aluminum pipes 8 and 9 at the seal surface 13.
Then, the two aluminum tubes 8 and 9 are covered with a stainless steel tube 12 made of a material having a smaller coefficient of thermal expansion than the aluminum tubes 8 and 9, and are respectively disposed on the outer circumferences of the end portions of the two aluminum tubes 8 and 9. The reverse screws 10 and 11 are provided to each other, and the two reverse screws 10 and 11 are screwed together so that the sealing surfaces 13 of the two aluminum tubes 8 and 9 are connected in a gas-tight manner. 7 is a gas passage.

従って、筒状のステンレス管１２の内周に設けた２本のアルミニム管８，９の管端部を当接させてシール面１３を設置し、２つの逆ネジ１０，１１を螺合することにより、２つの管のシール面１３を気体密に結合したので、２つの逆ネジ１０，１１の締付け力とアルミニム管８，９の熱膨張による押付力がシール面１３に架かることによって、２本のアルミニム管３の接合部は気体密に確実に連結される。   Therefore, the sealing end 13 is installed by bringing the tube ends of the two aluminum tubes 8 and 9 provided on the inner periphery of the cylindrical stainless steel tube 12 into contact, and the two reverse screws 10 and 11 are screwed together. As a result, the sealing surfaces 13 of the two pipes are gas-tightly coupled, so that the tightening force of the two reverse screws 10 and 11 and the pressing force due to the thermal expansion of the aluminum tubes 8 and 9 are applied to the sealing surface 13 so that two The joint portion of the aluminum tube 3 is securely connected in a gas-tight manner.

図３は、本発明の第３実施例を示す管継手の連結部の断面図である。
図３において、この第３実施例においては、前記第１実施例に係る管継手（外周結合部）１００と前記第２実施例に係る管継手（内周結合部）２００とを組み合わせたものである。
即ち、管継手１００は、ステンレス管１とステンレス管２とを接合して構成され、前記ステンレス管２の内周にステンレス管１を嵌合し、該嵌合部の端部をネジ４で結合している。該ネジ４の他端側には、ステンレス管１とステンレス管２よりも熱膨張率の大きいアルミニム管３が、前記ステンレス管１の端部５とステンレス管２の内面６との間に挟持されて、該端部５とステンレス管２の内面６にてシール面を構成している。 FIG. 3 is a cross-sectional view of a connecting portion of a pipe joint showing a third embodiment of the present invention.
In FIG. 3, the third embodiment is a combination of the pipe joint (outer peripheral joint) 100 according to the first embodiment and the pipe joint (inner peripheral joint) 200 according to the second embodiment. is there.
That is, the pipe joint 100 is configured by joining the stainless steel pipe 1 and the stainless steel pipe 2, the stainless steel pipe 1 is fitted to the inner periphery of the stainless steel pipe 2, and the end of the fitting part is coupled with the screw 4. is doing. On the other end side of the screw 4, an aluminum tube 3 having a higher coefficient of thermal expansion than the stainless tube 1 and the stainless tube 2 is sandwiched between the end portion 5 of the stainless tube 1 and the inner surface 6 of the stainless tube 2. The end portion 5 and the inner surface 6 of the stainless steel tube 2 constitute a sealing surface.

また、管継手２００は、２本のアルミニム管（小径管）８，９をシール面１３で突き合せ、該アルミニム管８，９よりも熱膨張率の小さい材料からなるステンレス管１２で該２本のアルミニム管８，９を覆い、前記２本のアルミニム管８，９の管端部外周にそれぞれ互いに逆ネジ１０，１１を設け、前記２つの逆ネジ１０，１１を螺合することにより前記２本のアルミニム管８，９の前記シール面１３を気体密に結合している。７はガス通路である。
そして、前記管継手（内周結合部）２００を、前記管継手（外周結合部）１００の内周に配置して、前記２つの管継手１００，２００を互いに同心に二重管式に形成している。 The pipe joint 200 has two aluminum pipes (small-diameter pipes) 8 and 9 abutted at the seal surface 13 and the two stainless steel pipes 12 made of a material having a smaller coefficient of thermal expansion than the aluminum pipes 8 and 9. Of the two aluminum tubes 8, 9 are respectively provided with reverse screws 10, 11 on the outer periphery of the tube ends of the two aluminum tubes 8, 9, and the two reverse screws 10, 11 are screwed together. The sealing surfaces 13 of the aluminum tubes 8 and 9 are coupled in a gas-tight manner. 7 is a gas passage.
Then, the pipe joint (inner peripheral joint part) 200 is disposed on the inner periphery of the pipe joint (outer peripheral joint part) 100, and the two pipe joints 100 and 200 are formed concentrically with each other in a double pipe type. ing.

かかる第３実施例によれば、前記第１実施例に係る管継手（外周結合部）１００と前記第２実施例に係る管継手（内周結合部）２００とを組み合わせて構成したので、管継手（内周結合部）２００の内部を流体の通路即ちガス通路７とし、該管継手（内周結合部）２００の外側を管継手（外周結合部）１００で覆うので、管継手（内周結合部）２００をアルミニウム管８，９で構成して内部を流体７が通過するように構成すれば、管継手（外周結合部）１００をＳＵＳ管で構成しているので、管継手（外周結合部）１００に流体が流れるのを回避でき、強固な管継手（外周結合部）１００でアルミニウム管８，９からなる管継手（内周結合部）２００を保護できる。   According to the third embodiment, the pipe joint (outer peripheral joint portion) 100 according to the first embodiment and the pipe joint (inner peripheral joint portion) 200 according to the second embodiment are configured in combination. Since the inside of the joint (inner peripheral joint) 200 is a fluid passage, that is, the gas passage 7, and the outer side of the pipe joint (inner peripheral joint) 200 is covered with the pipe joint (outer peripheral joint) 100, the pipe joint (inner If the coupling portion 200 is composed of the aluminum pipes 8 and 9 and the fluid 7 passes through the inside, the pipe joint (outer circumferential coupling portion) 100 is composed of a SUS pipe. Part) 100 can be prevented from flowing the fluid, and the strong pipe joint (outer peripheral joint part) 100 can protect the pipe joint (inner peripheral joint part) 200 made of the aluminum tubes 8 and 9.

図４は、本発明の第４実施例を示す管継手の連結部の断面図である。
図４において、前記ステンレス管１とステンレス管２の端部同士を当接させ（１５は当接部）、該ステンレス管１及びステンレス管２の管端部の外周に、ステンレス管１及びステンレス管２よりも熱膨張率の大きいアルミニム線材１７を複数巻巻装し、内周をステンレス管１及びステンレス管２に溶接する。７はガス通路である。 FIG. 4 is a cross-sectional view of a connecting portion of a pipe joint showing a fourth embodiment of the present invention.
In FIG. 4, the end portions of the stainless steel tube 1 and the stainless steel tube 2 are brought into contact with each other (15 is a contact portion), and the stainless steel tube 1 and the stainless steel tube are arranged on the outer periphery of the tube ends of the stainless steel tube 1 and the stainless steel tube 2. A plurality of aluminum wires 17 having a coefficient of thermal expansion greater than 2 are wound, and the inner periphery is welded to the stainless steel tube 1 and the stainless steel tube 2. 7 is a gas passage.

そして、前記アルミニム線材１７を覆うように筒体１６を設け、該筒体１６の両端鍔部１８ｓを、前記ステンレス管１及びステンレス管２の外周に形成された溝１ｓに嵌合する。また、前記筒体１６は、図４（Ｂ）のように割り面２０で２つ割りとなって、アルミニム線材１７への組み付けを容易にしている。
１８，１９は筒体押さえで、筒体１６の長手方向に２箇所設けられている。該筒体押さえ１８，１９はフランジ２１をボルト２２で締め付けている。 A cylindrical body 16 is provided so as to cover the aluminum wire 17, and both end flanges 18 s of the cylindrical body 16 are fitted into grooves 1 s formed on the outer circumferences of the stainless steel pipe 1 and the stainless steel pipe 2. Moreover, the said cylinder 16 is divided into two by the split surface 20 like FIG. 4 (B), and the assembly | attachment to the aluminum wire 17 is made easy.
Reference numerals 18 and 19 denote cylindrical body pressers, which are provided at two locations in the longitudinal direction of the cylindrical body 16. The cylindrical body holders 18 and 19 fasten the flange 21 with bolts 22.

かかる第４実施例によれば、筒体１６の内周に前記ステンレス管１及びステンレス管２の管端部を当接させて当接部１５を形成し、該ステンレス管１及びステンレス管２の管端部の外周に該ステンレス管１及びステンレス管２よりも熱膨張率の大きい材料からなるアルミニム線材１７を複数巻巻装し、前記筒体１６の両端鍔部１８ｓと溝１ｓとによって前記ステンレス管１及びステンレス管２を締着することにより前記当接部１５を気体密に結合したので、筒体１６の内周にステンレス管１及びステンレス管２の管端部を当接させて設置し、該ステンレス管１及びステンレス管２よりも熱膨張率の大きいアルミニム線材１７を複数巻巻装することにより、熱膨張率の大きいアルミニム線材１７によって、ステンレス管１及びステンレス管２の熱膨張により当接部１５が圧設され、該当接部１５が気体密に確実に連結される。   According to the fourth embodiment, the abutting portion 15 is formed by abutting the end portions of the stainless steel tube 1 and the stainless steel tube 2 on the inner periphery of the cylindrical body 16, and the stainless steel tube 1 and the stainless steel tube 2. A plurality of aluminum wires 17 made of a material having a higher coefficient of thermal expansion than the stainless steel tube 1 and the stainless steel tube 2 are wound around the outer periphery of the tube end, and the stainless steel is formed by both end flanges 18s and the groove 1s of the cylindrical body 16. Since the abutment portion 15 is gas-tightly coupled by fastening the tube 1 and the stainless tube 2, the tube ends of the stainless tube 1 and the stainless tube 2 are placed in contact with the inner periphery of the cylindrical body 16. By winding a plurality of aluminum wire rods 17 having a higher coefficient of thermal expansion than the stainless steel tube 1 and the stainless steel tube 2, the stainless steel tube 1 and the stainless steel tube 2 are wound by the aluminum wire rod 17 having a higher coefficient of thermal expansion. Abutment 15 is pressure set by the expansion, the abutment portion 15 is securely connected to the gas-tight.

図５は、本発明の第５実施例を示す管継手の連結部の断面図である。
図５において、この実施例においては、前記ステンレス管１とステンレス管２の端部を一定間隔をあけて配置し、該間隔部にベローズ２４を設けている。該ベローズ２４の両端部は前記ステンレス管１とステンレス管２に溶接されている。
そして、前記ベローズ２４を覆うように筒体２１を設け、該筒体２１の両端鍔部２１ｓを、前記ステンレス管１及びステンレス管２の外周に形成された溝１ｓに嵌合する。また、前記筒体２１は、図５（Ｂ）のように割り面２１ａで２つ割りとなって、ベローズ２４への組み付けを容易にしている。
２２，２３は筒体押さえで、筒体２１の長手方向に２箇所設けられている。該筒体押さえ２２，２３はフランジ２５をボルト２６で締め付け、固定している。７はガス通路である。 FIG. 5 is a cross-sectional view of a connecting portion of a pipe joint showing a fifth embodiment of the present invention.
In FIG. 5, in this embodiment, the end portions of the stainless steel tube 1 and the stainless steel tube 2 are arranged at a predetermined interval, and a bellows 24 is provided at the interval portion. Both end portions of the bellows 24 are welded to the stainless steel tube 1 and the stainless steel tube 2.
A cylindrical body 21 is provided so as to cover the bellows 24, and both end flanges 21 s of the cylindrical body 21 are fitted into grooves 1 s formed on the outer circumferences of the stainless steel pipe 1 and the stainless steel pipe 2. Further, as shown in FIG. 5B, the cylindrical body 21 is divided into two parts by a split surface 21a to facilitate the assembly to the bellows 24.
Reference numerals 22 and 23 denote cylindrical body pressers, which are provided at two locations in the longitudinal direction of the cylindrical body 21. The cylindrical body holders 22 and 23 are fixed by fastening flanges 25 with bolts 26. 7 is a gas passage.

かかる第５実施例によれば、筒体２１の内周に、ステンレス管１及びステンレス管２の管端部にベローズ２４を介在させて該管端部を対向させて設置し、前記筒体２１の両端部２１ｓを前記ステンレス管１及びステンレス管２の外周に設けた溝１ｓに嵌合して、前記筒体２１と前記ステンレス管１及びステンレス管２を連結したので、ベローズ２４を介在させたことにより、前記ステンレス管１及びステンレス管２の熱膨張を吸収できるとともに、ベローズ２４部分を折り畳むことにより、容易に格納できる。   According to the fifth embodiment, on the inner periphery of the cylinder 21, the pipe ends of the stainless pipe 1 and the stainless pipe 2 are placed with the bellows 24 interposed therebetween so that the pipe ends face each other. Since both end portions 21s of the stainless steel tube 1 and the stainless steel tube 2 are fitted into grooves 1s provided on the outer circumferences of the stainless steel tube 1 and the stainless steel tube 2, the cylindrical body 21, the stainless steel tube 1 and the stainless steel tube 2 are connected. Thus, the thermal expansion of the stainless steel tube 1 and the stainless steel tube 2 can be absorbed and the bellows 24 can be easily stored by folding.

以上の実施例に示されるガス採取管の連結部３００は、図６に示すように、水平面２１に設けられたガス管挿入用の挿入口２０の上側で、連結部３００を前記各実施例のようにして組み付けてから、連結部３００で連結された長尺の管を、次々と深相部に埋設する。
従って、本発明によれば、作業者が低温環境下で管の連結部３００を連結し、その後かかる連結部３００を前記低温環境下よりも高温の高温環境下に移動すれば、前記２つの環境下での熱膨張差によって該連結部３００に自動的に締め付け力が生起されて接続が確実となる。
また、１人の作業員で、長尺の管でも２つの管の接合作業が容易にでき、また作業中に連結部３００の構成部材が落下することも回避でき、これにより長尺の管でも容易に且つ確実に管の接続作業ができ、接続工数を低減した管継手を提供できる。 As shown in FIG. 6, the connecting portion 300 of the gas sampling pipe shown in the above embodiment is connected to the connecting portion 300 of the above-described embodiments on the upper side of the insertion port 20 for gas pipe insertion provided in the horizontal plane 21. After assembling in this way, the long pipes connected by the connecting part 300 are buried in the deep phase part one after another.
Therefore, according to the present invention, if the worker connects the connecting portion 300 of the pipe in a low temperature environment and then moves the connecting portion 300 to a high temperature environment higher than the low temperature environment, the two environments Due to the difference in thermal expansion below, a tightening force is automatically generated in the connecting part 300 to ensure the connection.
In addition, a single worker can easily join two pipes even with a long pipe, and can also prevent the constituent members of the connecting portion 300 from falling during the work. It is possible to provide a pipe joint that can easily and reliably connect pipes and reduce the number of connection steps.

本発明によれば、２つの管を長手方向に接続する管継手において、長尺の管でも容易に且つ確実に管の接続作業を簡単化し、且つ接続環境での温度差を利用して接続を確実にし、接続工数を低減した管継手を提供できる。   According to the present invention, in a pipe joint for connecting two pipes in the longitudinal direction, the connection work of the pipes can be easily and surely simplified even with a long pipe, and the connection is made using the temperature difference in the connection environment. It is possible to provide a pipe joint that is reliable and has reduced connection man-hours.

本発明の第１実施例を示す管継手の連結部の断面図である。It is sectional drawing of the connection part of the pipe joint which shows 1st Example of this invention. 本発明の第２実施例を示す管継手の連結部の断面図である。It is sectional drawing of the connection part of the pipe joint which shows 2nd Example of this invention. 本発明の第３実施例を示す管継手の連結部の断面図である。It is sectional drawing of the connection part of the pipe joint which shows 3rd Example of this invention. （Ａ）は本発明の第４実施例を示す管継手の連結部の断面図、（Ｂ）は（Ａ）のＡ−Ａ線断面図である。(A) is sectional drawing of the connection part of the pipe joint which shows 4th Example of this invention, (B) is the sectional view on the AA line of (A). （Ａ）は本発明の第５実施例を示す管継手の連結部の断面図、（Ｂ）は（Ａ）のＢ−Ｂ線断面図である。(A) is sectional drawing of the connection part of the pipe joint which shows 5th Example of this invention, (B) is BB sectional drawing of (A). 本発明の各実施例にかかる管継手の連結部の組立て方法を示す説明図である。It is explanatory drawing which shows the assembly method of the connection part of the pipe joint concerning each Example of this invention. 従来のガス採取管の接合部の構造を示す。The structure of the junction part of the conventional gas sampling pipe is shown.

符号の説明Explanation of symbols

１ ステンレス管
２ ステンレス管
３ アルミニム管
４ ネジ
８ アルミニム管
９ アルミニム管
１０，１１ 逆ネジ
１２ ステンレス管
１３ シール面
１６ 筒体
１７ アルミニム線材
２１ 筒体
２４ ベローズ
１００ 管継手（外周結合部）
２００ 管継手（内周結合部）
３００ 連結部 DESCRIPTION OF SYMBOLS 1 Stainless steel pipe 2 Stainless steel pipe 3 Arminium pipe 4 Screw 8 Arminium pipe 9 Arminium pipe 10,11 Reverse screw 12 Stainless steel pipe 13 Sealing surface 16 Cylindrical body 17 Arminium wire 21 Cylindrical body 24 Bellows 100 Pipe joint (outer peripheral joint)
200 Pipe joint (inner circumference joint)
300 connecting part

Claims (5)

２つの管を長手方向に接続する管継手において、前記２つの管の一端側をネジで結合し、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設け、前記２つの管の間に前記第３の管を挟持して、前記ネジを締め込むことにより前記２つの管と第３の管の両シール面を締着することを特徴とする管継手。   In a pipe joint for connecting two pipes in the longitudinal direction, one end side of the two pipes is coupled with a screw, and a third pipe made of a material having a higher thermal expansion coefficient than the two pipes is provided on the other end side, A pipe joint characterized in that the third pipe is sandwiched between the two pipes, and both the sealing surfaces of the two pipes and the third pipe are fastened by tightening the screws. ２つの管を長手方向に接続する管継手において、前記２つの管よりも熱膨張率の小さい材料からなる筒体の内周に、前記２つの管の管端部を当接させて設置し、前記筒体の両端内周に互いに逆ネジを設け、前記２つの管の管端部外周にそれぞれ互いに逆ネジを設け、前記２つの逆ネジを螺合することにより前記２つの管の前記シール面を気体密に結合することを特徴とする管継手。   In the pipe joint that connects the two pipes in the longitudinal direction, the pipe ends of the two pipes are placed in contact with the inner periphery of the cylindrical body made of a material having a smaller coefficient of thermal expansion than the two pipes, The seal surfaces of the two tubes are provided by providing reverse screws on the inner circumferences of both ends of the cylindrical body, providing reverse screws on the outer circumferences of the tube ends of the two tubes, and screwing the two reverse screws. Is a gas-tight coupling. 管を長手方向に接続する管継手において、２つの管の一端側をネジで結合し、他端側に２つの管よりも熱膨張率の大きい材料からなる第３の管を設け、前記２つの管の間に前記第３の管を挟持して、前記ネジを締め込むことにより前記２つの管と第３の管の両シール面を締着するように構成された外周結合部と、
２つの小径管よりも熱膨張率の小さい材料からなる筒体の内周に、前記２つの小径管の管端部を当接させて設置し、前記筒体の両端内周に互いに逆ネジを設け、前記２つの小径管の管端部外周にそれぞれ互いに逆ネジを設け、前記２つの逆ネジを螺合することにより前記２つの小径管の前記シール面を気体密に結合するように構成された内周結合部を、前記外周結合部の内周に前記内周結合部を互いに同心に二重管式に形成したことを特徴とする管継手。 In the pipe joint for connecting the pipes in the longitudinal direction, one end sides of the two pipes are coupled with screws, and a third pipe made of a material having a higher coefficient of thermal expansion than the two pipes is provided on the other end side. An outer peripheral coupling part configured to clamp the third pipe between the pipes and fasten the screws to fasten both seal surfaces of the two pipes and the third pipe;
The pipe ends of the two small-diameter pipes are placed in contact with the inner circumference of the cylinder made of a material having a smaller coefficient of thermal expansion than the two small-diameter pipes, and reverse screws are attached to both inner circumferences of the cylinder. And provided with reverse screws on the outer circumferences of the pipe end portions of the two small-diameter pipes, and by screwing the two reverse screws, the sealing surfaces of the two small-diameter pipes are coupled in a gas-tight manner. A pipe joint characterized in that the inner peripheral coupling part is formed in a double pipe type concentrically with each other on the inner circumference of the outer peripheral coupling part. ２つの管を長手方向に接続する管継手において、筒体の内周に前記２つの管の管端部を当接させて設置し、該２つの管の管端部の外周に前記２つの管よりも熱膨張率の大きい材料からなる線材を複数巻巻装し、前記筒体の両端部によって前記２つの管を締着することにより前記当接部を気体密に結合することを特徴とする管継手。   In a pipe joint for connecting two pipes in the longitudinal direction, the pipe ends of the two pipes are placed in contact with the inner circumference of a cylindrical body, and the two pipes are placed on the outer circumference of the pipe ends of the two pipes. A plurality of wire rods made of a material having a higher thermal expansion coefficient than the other are wound, and the two pipes are fastened by both end portions of the cylindrical body, whereby the contact portion is gas-tightly coupled. Pipe fittings. ２つの管を長手方向に接続する管継手において、筒体の内周に、前記２つの管の管端部にベローズを介在させて該管端部を対向させて設置し、前記筒体の両端部を前記２つの管の外周に設けた溝に嵌合して前記筒体と前記２つの管を連結したことを特徴とする管継手。   In a pipe joint for connecting two pipes in the longitudinal direction, the pipe ends are installed on the inner periphery of the cylinder with the bellows interposed between the pipe ends of the two pipes, and both ends of the cylinder A pipe joint characterized in that the cylindrical body and the two pipes are connected by fitting a portion into a groove provided on the outer periphery of the two pipes.
JP2007336596A 2007-12-27 2007-12-27 Pipe fitting Withdrawn JP2009156380A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506246A (en) * 2011-10-21 2012-06-20 中国石油天然气集团公司 Compound pipeline joint with base pipe as long as a liner pipe and manufacturing method thereof
JP2016050862A (en) * 2014-08-30 2016-04-11 四国電力株式会社 Sulfur trioxide density measurement method and device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506246A (en) * 2011-10-21 2012-06-20 中国石油天然气集团公司 Compound pipeline joint with base pipe as long as a liner pipe and manufacturing method thereof
JP2016050862A (en) * 2014-08-30 2016-04-11 四国電力株式会社 Sulfur trioxide density measurement method and device

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