JPH08184393A - Pipe joint - Google Patents
Pipe jointInfo
- Publication number
- JPH08184393A JPH08184393A JP6340277A JP34027794A JPH08184393A JP H08184393 A JPH08184393 A JP H08184393A JP 6340277 A JP6340277 A JP 6340277A JP 34027794 A JP34027794 A JP 34027794A JP H08184393 A JPH08184393 A JP H08184393A
- Authority
- JP
- Japan
- Prior art keywords
- joint
- pipe joint
- inner peripheral
- annular groove
- peripheral surface
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、管継手に関する。更に
詳しくは、簡単な構造で、高い密封精度を得ることがで
き、信頼性や施工性に優れた管継手に関するものであ
る。FIELD OF THE INVENTION The present invention relates to a pipe joint. More specifically, the present invention relates to a pipe joint that has a simple structure, can obtain high sealing accuracy, and is excellent in reliability and workability.
【０００２】[0002]
【従来の技術】従来、液体やガス，粉流体，スラリー等
を搬送する管，バルブ，ポンプ等を各々接続する場合、
ガス管継手、フランジ継手、ユニオン継手が用いられ、
各管継手のつば部の接合面を突き合わせ、ボルト・ナッ
トで締め付けたり、袋状ナットを用いて締め付けて、接
続することが広く知られている。以下に従来の管継手に
ついて、図面を参照しながら説明する。図８（ａ）は従
来の管継手の１つであるフランジ継手の全体斜視図であ
り、図８（ｂ）はその断面図である。１′は従来のフラ
ンジ継手である管継手、２は金属製等からなる管状の継
手部、２ａは継手部２の端部に延設されたつば部、２ｂ
は継手部２及びつば部２ａの略中央部に穿口された開口
部の内周面、２ｃはつば部２ａの端面に形成され相手側
の管継手（図示せず）と密接される接合面、２ｄはつば
部２ａに４個所貫通して形成されたボルト挿通孔であ
る。以上のように構成された従来の管継手について、以
下それを用いて管と管を接続する方法を説明する。ま
ず、各管（図示せず）の端部に、各々溶接等により管継
手１′を接続する。次に、接合面２ｃ間にガスケット
（図示せず）を配して、接合面２ｃ同士を突き合わせ
る。次に、各ボルト挿通孔２ｄにボルト（図示せず）を
挿入した後、ナット（図示せず）を締め付けて、接続を
完了する。2. Description of the Related Art Conventionally, when connecting pipes, valves, pumps, etc. for carrying liquids, gases, powder fluids, slurries, etc., respectively,
Gas pipe fittings, flange fittings, union fittings are used,
It is widely known that the joint surfaces of the flanges of each pipe joint are butted and tightened with a bolt / nut or a bag-shaped nut for connection. A conventional pipe joint will be described below with reference to the drawings. FIG. 8A is an overall perspective view of a flange joint, which is one of conventional pipe joints, and FIG. 8B is a sectional view thereof. Reference numeral 1'denotes a pipe joint which is a conventional flange joint, 2 a tubular joint portion made of metal or the like, 2a a collar portion extending from an end of the joint portion 2 and 2b.
Is the inner peripheral surface of the opening formed in the substantially central portion of the joint portion 2 and the collar portion 2a, and 2c is the joint surface formed on the end surface of the collar portion 2a and in close contact with the mating pipe joint (not shown). Designated by 2d are bolt insertion holes formed at four places in the collar portion 2a. With respect to the conventional pipe joint configured as described above, a method of connecting pipes using the pipe joint will be described below. First, the pipe joint 1'is connected to the end of each pipe (not shown) by welding or the like. Next, a gasket (not shown) is arranged between the joint surfaces 2c, and the joint surfaces 2c are abutted against each other. Next, after inserting a bolt (not shown) into each bolt insertion hole 2d, a nut (not shown) is tightened to complete the connection.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記従来
の構成では、液体やガス、蒸気等の漏洩を防止するため
に、管継手の接合面を平行にして完全密着させねばなら
ず、とくにプラント設備等のように大口径の管等を使用
する場合、接合面を平行に合わせることが困難であると
いう問題点を有していた。また、誤って接合面を傷つけ
易く、これにより、密封精度を低下させてしまうという
問題点を有していた。さらに、管継手をボルト等で締め
つける場合、対角線状に締め付けを繰り返して（以下対
角締めと称す）、適正な締め付けトルクまで増し締め作
業を繰り返す必要があり、作業性や施工性に欠けるとい
う問題点を有していた。また、接合面には、各種ガスケ
ットを配設するが、ガスケットを所定位置に装着するの
に手間を要し作業性に欠けるという問題点を有してい
た。また、高密封精度を得るために、フッ素樹脂等から
なるガスケットを用いているが、作業によってはこのガ
スケットがよじれて、密封精度を低下させてしまうとい
う問題点を有していた。また、接合面にシーラント等の
シール材を塗布する方法も提案されているが、手間がか
かり作業性や施工性に欠けるという問題点を有してい
た。また、高温域で使用されると、このシール材が融け
てしまい、密封精度が損なわれ、信頼性に欠けるという
問題点を有していた。さらに、地震等によって振動が負
荷されると、この振動によって接合面の平面度が失わ
れ、これにより、密封精度を低下させてしまうという問
題点を有していた。However, in the above-mentioned conventional structure, in order to prevent leakage of liquid, gas, vapor, etc., the joint surfaces of the pipe joints must be parallel and completely adhered to each other. As described above, when using a large-diameter pipe or the like, it is difficult to align the joint surfaces in parallel. In addition, there is a problem that the joint surface is apt to be damaged accidentally, and thereby the sealing accuracy is deteriorated. Furthermore, when tightening the pipe joint with bolts, etc., it is necessary to repeat the tightening diagonally (hereinafter referred to as diagonal tightening) and repeat the additional tightening work up to the proper tightening torque, resulting in poor workability and workability. Had a point. Further, although various gaskets are arranged on the joint surface, there is a problem that it takes time and effort to mount the gaskets at a predetermined position, and workability is poor. Further, in order to obtain high sealing accuracy, a gasket made of fluororesin or the like is used. However, there is a problem that the gasket is twisted depending on the work and the sealing accuracy is lowered. Also, a method of applying a sealant such as a sealant to the joint surface has been proposed, but it has a problem that it takes time and labor and workability are poor. Further, when used in a high temperature range, the sealing material melts, the sealing accuracy is impaired, and reliability is lacking. Furthermore, when vibration is applied due to an earthquake or the like, the flatness of the joint surface is lost due to this vibration, which causes a problem that sealing accuracy is deteriorated.
【０００４】本発明は上記従来の問題点を解決するもの
で、ガスケット等を要することがなく配管接続時の作業
性を向上させるとともに、簡単な構造で高い密封精度を
得ることができ、信頼性や作業性に優れた管継手を提供
することを目的とする。The present invention solves the above-mentioned problems of the prior art by improving the workability when connecting pipes without requiring a gasket or the like, and by obtaining a high sealing precision with a simple structure, the reliability is improved. It is an object of the present invention to provide a pipe joint excellent in workability.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
に本発明は、以下の構成を有している。すなわち、請求
項１に記載の管継手は、つば部の内周面に内周面と同軸
状に形成された１乃至複数の環状溝を備えたことを特徴
とする管継手。請求項２に記載の管継手は、請求項１に
おいて、つば部の接合面に内周面と同軸状に形成された
１乃至複数の凸条部を備えた構成を有している。請求項
３に記載の管継手は、請求項１において、つば部の接合
面に内周面と同軸状に形成された１乃至複数の凹条部を
備えた構成を有している。請求項４に記載の管継手は、
請求項３において、凹条部に配設されたＯリング等のガ
スケットを備えた構成を有している。請求項５に記載の
管継手は、請求項１乃至４の内いずれか１において、凸
条部及び凹条部の直径が、環状溝の直径より小さい構成
を有している。請求項６に記載の管継手は、請求項１乃
至５の内いずれか１において、複数の環状溝の内、接合
面側に位置する環状溝の直径が、他の環状溝の直径より
小さい構成を有している。請求項７に記載の管継手は、
請求項１乃至６の内いずれか１において、管継手が、フ
ランジ継手である構成を有している。請求項８に記載の
管継手は、請求項１乃至６の内いずれか１において、管
継手が、ユニオン継手である構成を有している。In order to achieve this object, the present invention has the following arrangement. That is, the pipe joint according to claim 1 is provided with one or a plurality of annular grooves formed coaxially with the inner peripheral surface on the inner peripheral surface of the collar portion. According to a second aspect of the present invention, in the pipe joint according to the first aspect, the joint surface of the collar portion is provided with one to a plurality of ridges formed coaxially with the inner peripheral surface. According to a third aspect of the present invention, in the pipe joint according to the first aspect, the joint surface of the collar portion is provided with one or a plurality of concave streak portions formed coaxially with the inner peripheral surface. The pipe joint according to claim 4,
In Claim 3, it has the composition provided with the gasket, such as an O-ring, arranged in the groove. According to a fifth aspect of the present invention, in the pipe joint according to any one of the first to fourth aspects, the diameters of the ridges and the ridges are smaller than the diameter of the annular groove. A pipe joint according to a sixth aspect is the pipe joint according to any one of the first to fifth aspects, wherein a diameter of the annular groove located on the joint surface side of the plurality of annular grooves is smaller than that of the other annular groove. have. The pipe joint according to claim 7,
The pipe joint according to any one of claims 1 to 6 has a configuration that is a flange joint. The pipe joint according to an eighth aspect is the pipe joint according to any one of the first to sixth aspects, wherein the pipe joint is a union joint.
【０００６】ここで、管継手としては、一時的継手や永
久継手，伸縮継手が挙げられる。具体的には、フランジ
管や薄型フランジ，ハブフランジ，一体フランジ等のフ
ランジ継手，９０°エルボ，４５°エルボ，Ｙ形エル
ボ，Ｔ形エルボ，クロス形エルボ等の継手，インクリー
ザー，一対の前記フランジ継手や前記継手をユニオンと
袋状ナットで接続したり前記フランジ継手や前記継手の
周壁に形成された螺状部に袋状ナットを螺合して接続す
るユニオン継手，バルブ，ポンプ等の継手部が含まれ
る。管継手の材質としては、可鍛鋳鉄，炭素鋼，合金
鋼，ステンレス鋼，アルミニウム，黄銅等の金属材料，
硬質塩化ビニル，ポリエチレン等の合成樹脂等が挙げら
れる。これらは、本発明の管継手と接続又は一体とされ
る管，バルブ，ポンプ等の材質により適宜選択される。
また、管継手の接合面は、ＪＩＳ Ｂ ２２１０又はＪ
ＩＳ Ｂ ２２２０に準拠し、全平面座，大平面座，小
平面座としてもよい。さらに、内圧が高い場合には、は
め込み形，溝形としてもよい。Here, examples of the pipe joint include a temporary joint, a permanent joint, and an expansion joint. Specifically, flange pipes, thin flanges, hub flanges, integral flanges and other flange joints, 90 ° elbows, 45 ° elbows, Y-shaped elbows, T-shaped elbows, cross-shaped elbows, etc., increasers, a pair of the above A flange joint or a joint for connecting the joint with a union with a cap nut, or a union joint, a valve, a pump, or the like for connecting the flange joint or the cap-shaped nut to a threaded portion formed on the peripheral wall of the joint. Parts are included. As the material of the pipe joint, malleable cast iron, carbon steel, alloy steel, stainless steel, aluminum, brass and other metal materials,
Examples include hard vinyl chloride and synthetic resins such as polyethylene. These are appropriately selected depending on the material of the pipe, valve, pump, etc. connected or integrated with the pipe joint of the present invention.
The joint surface of the pipe joint is JIS B 2210 or J
In conformity with IS B 2220, the seat may be a flat seat, a large seat, or a small seat. Further, when the internal pressure is high, a fitting type or a groove type may be used.
【０００７】環状溝は、つば部の内周面に形成され、接
合面に弾力性を付与するものである。環状溝は、つば部
と同軸状に形成されるのが好ましい。接合面に均等に弾
力性を付与させ、接触される相手側の接合面とのシール
性をよくすることができるからである。環状溝の直径
は、後述する凸条部や凹条部の直径より大きく形成され
るのが好ましい。環状溝の直径が凸条部や凹条部の直径
より大きくなるにつれ凸条部や凹条部の軸方向の移動量
を大きくすることができるので、凸条部や凹条部の接触
される接合面に対する応答性や追従性をよくすることが
でき、さらにシール性をよくすることができる。さら
に、環状溝を複数形成する場合、接合面側に位置する環
状溝の直径は、他の環状溝の直径より小さくかつ、前記
凸条部や凹条部の径より大きく形成されるのが好まし
い。環状溝を１つ形成した場合に比べて、接合面の内周
面近傍の軸方向の弾性変形量を大きくすることができる
ので、接合される相手側の接合面の挙動や管継手内を流
動される蒸気等の内圧に柔軟に対応することができ、良
好なシール性を持たせることができる。なお、環状溝の
幅や形成数等は、つば部の厚み等に応じて適宜決定され
る。また、環状溝の直径，接合面側の環状溝の形成位置
等は、管継手の材料に応じて適宜決定される。The annular groove is formed on the inner peripheral surface of the collar portion and imparts elasticity to the joint surface. The annular groove is preferably formed coaxially with the collar portion. This is because it is possible to evenly impart elasticity to the joint surface and improve the sealing property with the joint surface on the other side to be contacted. The diameter of the annular groove is preferably formed to be larger than the diameter of the ridges or ridges described below. As the diameter of the annular groove becomes larger than the diameter of the ridges or the ridges, the amount of axial movement of the ridges or the ridges can be increased, so that the ridges or the ridges come into contact with each other. It is possible to improve the responsiveness and followability to the joint surface, and further improve the sealing property. Furthermore, when forming a plurality of annular grooves, it is preferable that the diameter of the annular groove located on the joining surface side is smaller than the diameters of the other annular grooves and larger than the diameters of the convex ridges and the concave ridges. . Compared to the case where one annular groove is formed, the amount of elastic deformation in the axial direction near the inner peripheral surface of the joint surface can be increased, so the behavior of the joint surface on the mating side and the flow in the pipe joint It is possible to flexibly cope with the internal pressure of steam or the like that is generated, and to provide good sealing properties. The width of the annular groove, the number of the grooves formed, and the like are appropriately determined according to the thickness of the collar portion and the like. Further, the diameter of the annular groove, the formation position of the annular groove on the joining surface side, etc. are appropriately determined according to the material of the pipe joint.
【０００８】凸条部は、接触される接合面とのあたりを
とるものである。凸条部の断面形状としては、とくに限
定されるものではなく、円形状，三角形状，方形状等が
挙げられる。また、凸条部の高さは、管継手の材料や環
状溝の直径，形成位置等に応じて適宜決定され、例え
ば、凸条部を複数形成した場合、接合面の弾性変形量等
に応じて内径側の凸条部の高さを外径側の凸条部の高さ
より高く形成してもよい。これにより、各凸条部の先端
部をいずれも相手側の接合面に接触させることができ、
シール性を向上させることができる。凹条部は、Ｏリン
グ等のガスケットを配設したり又は当接されるフランジ
の接合面の凸条部を内接させるものである。凹条部の断
面形状は、とくに限定されるものではないが、Ｏリング
等のガスケットの形状や内接される前記凸条部の断面形
状に合わせて形成すると、シール性を向上させることが
できる。ガスケットとしては、とくに限定されるもので
はないが、従来公知のゴム，合成樹脂，アスベスト，黒
鉛等からなるＯリング，Ｕパッキング，Ｖパッキング等
が好適に用いられる。凸条部や凹条部は、接合面の内周
面近傍に形成されるのが好ましい。接合面の内周面に近
接させるにつれ、接合面の軸方向の弾性変形量が大きく
なるので、接触される相手側の接合面に応じて柔軟に対
応することができる。The ridge portion is to come into contact with the contact surface to be contacted. The cross-sectional shape of the ridge is not particularly limited, and may be circular, triangular, rectangular, or the like. The height of the ridge is appropriately determined according to the material of the pipe joint, the diameter of the annular groove, the forming position, etc. For example, when a plurality of ridges are formed, the height of the ridge depends on the elastic deformation amount of the joint surface. The height of the ridge portion on the inner diameter side may be formed higher than the height of the ridge portion on the outer diameter side. As a result, it is possible to bring the tips of the ridges into contact with the mating surface on the other side.
The sealing property can be improved. The concave streak is for arranging a gasket such as an O-ring or for inscribing the convex streak on the joint surface of the flange with which the gasket contacts. Although the cross-sectional shape of the concave streak is not particularly limited, the sealing property can be improved by forming it according to the shape of the gasket such as an O-ring or the cross-sectional shape of the convex streak to be inscribed. . The gasket is not particularly limited, but conventionally known O-rings made of rubber, synthetic resin, asbestos, graphite, etc., U packing, V packing, etc. are preferably used. The ridges and the ridges are preferably formed near the inner peripheral surface of the joint surface. Since the amount of elastic deformation of the joint surface in the axial direction increases as the joint surface is brought closer to the inner peripheral surface, it is possible to flexibly cope with the mating joint surface of the mating side.
【０００９】本発明の管継手を用いて接続する場合、相
手側の管継手には全面座、大平面座、小平面座を有する
管継手や接合面に凸条部や凹条部を有するものが用いら
れる。一方の接合面に凸条部を有するときは相手の接合
面に凹条部や凹条部と環状溝を有するもの，凹条部にガ
スケットを装着したものを用いてもよい。When connecting using the pipe joint of the present invention, the mating pipe joint has a full face seat, a large flat face seat, and a small flat face seat, or a joint surface having a convex ridge or a concave ridge. Is used. When one of the joint surfaces has a convex portion, a mating joint surface having a concave portion, a concave portion and an annular groove, or a concave portion provided with a gasket may be used.
【００１０】[0010]
【作用】この構成によって、以下の作用を奏する。すな
わち、 （１）つば部の内周面に環状溝が形成されたので、接合
面に弾力性を付与することができる。これにより、相手
側の管継手と接続したとき、この接合面が相手側の接合
面形状に追従して弾性範囲内において変形することがで
き、また、水や油等の液状，又は蒸気やガス，空気の流
体が流動されて環状溝内に圧力がかかりかつ接合面の復
元力によってガスケットを設定位置に強固に保持し相手
側の接合面に強固に当接させることができ、高い密封性
を発揮することができる。 （２）つば部の接合面に内周面と同軸状に形成された１
乃至複数の凸条部を備えた場合、この凸条部によって相
手側の接合面とのあたりをとることができ、高い密封精
度を得ることができる。 （３）つば部の内周面に形成された環状溝と、つば部の
接合面に形成されかつ直径が前記環状溝の直径より小さ
くされた凸条部を備えた場合、凸条部で相手側の接合面
とのあたりをとることができるとともに相手側の接合面
形状等に応じて凸条部の部位が弾性変形し、相手側の接
合面に対する応答性や追従性を向上させることができ
る。 （４）つば部の内周面に形成された環状溝と、つば部の
接合面に形成されかつ直径が前記環状溝の直径より小さ
くされた凹条部を備えた場合、凹条部内に配設されたＯ
リング等で相手側の接合面とのあたりをとることがで
き、さらに凹条部の部位の弾性変形量が大きいので、ガ
スケットや相手側の接合面に対する応答性や追従性をさ
らに向上させることができる。また、相手側の接合面が
大平面座や小平面座であってもこれら大平面座や小平面
座に対するあたりをとることができ、これにより、高い
密封精度を得ることができる。 （５）一方の管継手の接合面に凸条部を形成し、他方の
管継手の接合面に前記凸条部と内接する凹条部を形成し
た場合、凸条部と凹条部とが内接されることにより、高
い密封精度を得ることができる。 （６）一方の管継手の接合面に凸条部と内周面に環状溝
を形成し、他方の管継手の接合面に前記凸条部と内接す
る凹条部を形成した場合、凸条部と凹条部とが内接さ
れ、かつ接触時の負荷によって凸条部の部位が弾性変形
するのでさらに高い密封精度を得ることができる。 （７）一方の管継手の接合面に凸条部と内周面に環状溝
を形成し、他方の管継手の接合面に前記凸条部と内接す
る凹条部と内周面に環状溝を形成した場合、凸条部と凹
条部とが内接され、かつ接触時の負荷によって凸条部や
凹条部の部位が弾性変形するのでさらに高い密封精度を
得ることができる。 （８）管継手が、前記環状溝，前記凸条部及び／又は前
記凹条部を備えたフランジ継手である場合、接合面を相
手側の接合面に応じて弾性変形させることができるの
で、ボルト等によって締め付けるとき、対角締め等しな
くても、良好なシール性を得ることができる。 （９）管継手が、前記環状溝，前記凸条部及び／又は前
記凹条部を備えたユニオン継手である場合、接合面を相
手側の接合面に応じて弾性変形させることができるの
で、袋状ナット等によって締め付けるとき、良好なシー
ル性を得ることができる。With this structure, the following actions are achieved. That is, (1) Since the annular groove is formed on the inner peripheral surface of the collar portion, elasticity can be imparted to the joint surface. As a result, when connected to the mating pipe joint, this joint surface can be deformed within the elastic range by following the mating face shape of the mating side, and liquid such as water or oil, or steam or gas. ， The air fluid flows, the pressure is applied to the annular groove, and the restoring force of the joint surface allows the gasket to be firmly held at the set position and firmly abut against the mating surface of the mating side. Can be demonstrated. (2) 1 formed coaxially with the inner peripheral surface on the joint surface of the collar portion
When a plurality of ridges are provided, the ridges can make contact with the mating surface on the mating side, and high sealing accuracy can be obtained. (3) When the annular groove formed on the inner peripheral surface of the collar portion and the ridge portion formed on the joint surface of the collar portion and having a diameter smaller than the diameter of the annular groove, the ridge portion is opposed to the ridge portion. It is possible to make contact with the mating surface of the mating side and elastically deform the portion of the ridge according to the shape of the mating surface of the mating side, etc., and improve the responsiveness and followability to the mating surface of the mating side. . (4) In the case where the annular groove formed on the inner peripheral surface of the collar portion and the groove portion formed on the joint surface of the collar portion and having a diameter smaller than the diameter of the annular groove are arranged in the groove portion. Set O
It is possible to make contact with the mating surface of the mating side with a ring, etc., and since the amount of elastic deformation of the recessed portion is large, it is possible to further improve the responsiveness and followability to the gasket and mating surface of the mating side. it can. Further, even if the mating surface on the mating side is a large plane seat or a small plane seat, it is possible to make contact with these large plane seats or small plane seats, whereby high sealing accuracy can be obtained. (5) In the case where a ridge portion is formed on the joint surface of one pipe joint and a concave ridge portion inscribed in the ridge portion is formed on the joint surface of the other pipe joint, the ridge portion and the ridge portion are By being inscribed, high sealing accuracy can be obtained. (6) When a ridge portion and an annular groove are formed on the joint surface of one pipe joint and an annular groove on the inner peripheral surface, and a groove portion inscribed in the ridge portion is formed on the joint surface of the other pipe joint, Since the portion and the concave streak are inscribed and the portion of the convex streak is elastically deformed by the load at the time of contact, higher sealing accuracy can be obtained. (7) An annular groove is formed on the joint surface of one of the pipe joints, and an annular groove is formed on the joint surface of the other pipe joint, and a groove is inscribed on the joint surface of the other pipe joint and the annular groove is formed on the inner peripheral surface. When the ridge is formed, the ridges and the ridges are inscribed and the load of the contact elastically deforms the ridges and the ridges, so that higher sealing accuracy can be obtained. (8) When the pipe joint is a flange joint provided with the annular groove, the convex strip portion and / or the concave strip portion, the joint surface can be elastically deformed according to the joint surface on the other side, When tightening with bolts or the like, good sealing property can be obtained without diagonal tightening. (9) When the pipe joint is a union joint provided with the annular groove, the convex ridge portion and / or the concave ridge portion, the joint surface can be elastically deformed according to the joint surface on the other side. When tightened with a bag-shaped nut or the like, good sealability can be obtained.
【００１１】[0011]
【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。 （実施例１）図１（ａ）は本発明の第１実施例における
管継手の全体斜視図であり、図１（ｂ）はその断面図で
あり、図１（ｃ）はその要部拡大断面図である。２は継
手部、２ａはつば部、２ｂは内周面、２ｃは接合面、２
ｄはボルト挿通孔であり、これらは従来例と同様なもの
なので同一の符号を付して説明を省略する。従来例と異
なるのは、本発明の第１実施例における管継手１ａが、
つば部２ａの内周面２ｂにこの内周面２ｂと同軸状に形
成された環状溝３ａと、接合面２ｃの内周面２ｂ近傍に
この内周面２ｂと同軸状に形成された２個の凸条部４
と、を備えた点である。An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 (a) is an overall perspective view of a pipe joint in a first embodiment of the present invention, FIG. 1 (b) is a sectional view thereof, and FIG. FIG. 2 is a joint portion, 2a is a brim portion, 2b is an inner peripheral surface, 2c is a joining surface, 2
Reference numeral d denotes a bolt insertion hole, which is the same as that of the conventional example, and therefore, the same reference numeral is given and its description is omitted. The difference from the conventional example is that the pipe joint 1a in the first embodiment of the present invention is
An annular groove 3a formed coaxially with the inner peripheral surface 2b on the inner peripheral surface 2b of the collar portion 2a, and two grooves formed coaxially with the inner peripheral surface 2b near the inner peripheral surface 2b of the joint surface 2c. Ridge 4
And, it is a point equipped with.
【００１２】以上のように構成された本実施例の管継手
を用いて２組の試験体を準備し、シール性能の評価を行
った。以下その結果について、図面を参照しながら説明
する。 （実験例１，２）図２はシール性能の評価試験を示す模
式図である。５はボルト、６はナット、７は実施例１の
管継手１ａと従来の管継手１′に溶接法を用いて接続さ
れた支管部、８は水槽、９は水槽８に貯留された水であ
る。ここで、各支管部７は空気供給管（図示せず）を介
して空気供給部（図示せず）に接続されている。まず、
本実施例の管継手１ａと従来の管継手１′を準備し、各
管継手１ａ，１′の後端部に溶接により支管部７を接続
した。次に、各管継手１ａ，１′の接合面２ｃ同士を負
荷をかけずに突き合わせ、接合面２ｃ間の間隙を測定し
た。この結果、本実験例に用いた各管継手１ａ，１′の
接合面２ｃ間の間隙は０．３７mmであった。次に、各ボ
ルト挿通孔２ｄにボルト５を挿通し、ボルト５とナット
６を対角締めしたときの接合面２ｃ間の間隙を測定し
た。この結果、接合面２ｃ間の間隙は０．２mm（実験例
１），０．１mm（実験例２）であることがわかった。次
に、この状態で、図２に示すように、水槽８に水没させ
た後、空気供給部のスイッチ（図示せず）を入れ、空気
を導入し、各管継手１ａ，１′の接合面２ｃからの空気
の漏れの有無を試験した。ここで、空気圧は２kg/cm2か
ら時間をかけながら逐次昇圧し１０kg/cm2としたが、い
ずれも空気の漏れは検出されなかった。Two sets of test bodies were prepared using the pipe joint of the present embodiment constructed as described above, and the sealing performance was evaluated. The results will be described below with reference to the drawings. (Experimental Examples 1 and 2) FIG. 2 is a schematic view showing an evaluation test of sealing performance. 5 is a bolt, 6 is a nut, 7 is a branch pipe connected to the pipe joint 1a of the first embodiment and the conventional pipe joint 1'using a welding method, 8 is a water tank, and 9 is water stored in the water tank 8. is there. Here, each branch pipe part 7 is connected to an air supply part (not shown) via an air supply pipe (not shown). First,
The pipe joint 1a of the present embodiment and the conventional pipe joint 1'were prepared, and the branch pipe portion 7 was connected to the rear end of each pipe joint 1a, 1'by welding. Next, the joint surfaces 2c of the respective pipe joints 1a and 1'were abutted against each other without applying a load, and the gap between the joint surfaces 2c was measured. As a result, the gap between the joint surfaces 2c of the pipe joints 1a and 1'used in this experimental example was 0.37 mm. Next, the bolt 5 was inserted into each bolt insertion hole 2d, and the gap between the joint surfaces 2c when the bolt 5 and the nut 6 were diagonally tightened was measured. As a result, it was found that the gaps between the joint surfaces 2c were 0.2 mm (Experimental Example 1) and 0.1 mm (Experimental Example 2). Next, in this state, as shown in FIG. 2, after submerging in the water tank 8, a switch (not shown) of the air supply unit is turned on to introduce air, and the joint surfaces of the pipe joints 1a and 1'are joined. The presence or absence of air leakage from 2c was tested. Here, the air pressure is set to 10 kg / cm 2 boosts while sequentially over time from 2 kg / cm 2, both air leakage was detected.
【００１３】（実験例３）実験例１と同様にして、ボル
ト５とナット６を対角締めせずに自由締め付けしたとき
の接合面２ｃからの空気の漏れの有無を前記実験例１，
２と同様にして試験した。この結果、空気の漏れは検出
されなかった。(Experimental Example 3) In the same manner as in Experimental Example 1, the presence or absence of air leakage from the joint surface 2c when the bolt 5 and the nut 6 are freely tightened without being diagonally tightened is checked in the above Experimental Examples 1 and 1.
Tested as in 2. As a result, no air leak was detected.
【００１４】（実験例４）各管継手１ａ，１′を５０回
分解・再組み込みした後、実験例１と同様にして、接合
面２ｃからの空気の漏れの有無を試験した。ここで、１
０回程度までは対角締めし、後は自由締め付けした。そ
の結果でも、空気の漏れは検出されなかった。(Experimental Example 4) Each pipe joint 1a, 1'was disassembled and reassembled 50 times, and then, in the same manner as in Experimental Example 1, the presence or absence of air leakage from the joint surface 2c was tested. Where 1
It was diagonally tightened up to about 0 times and then freely tightened. As a result, no air leak was detected.
【００１５】（実験例５，６，７）各管継手１ａ，１′
を、各接合面２ｃ全面が当接するまで対角締めして接続
した後、恒温槽で１５０℃（実験例５），２００℃（実
験例６），２７５℃（実験例７）で５分間加熱した。次
に、冷却した後、接続された各管継手１ａ，１′を分解
し、さらに各接合面２ｃ全面が当接するまで対角締めし
て再組み込みした後、実験例１と同様にして、接合面２
ｃからの空気の漏れの有無を試験した。この結果、いず
れも空気の漏れは検出されなかった。(Experimental Examples 5, 6, 7) Each pipe joint 1a, 1 '
Are connected diagonally until each contact surface 2c abuts, and then heated in a constant temperature bath at 150 ° C (Experimental Example 5), 200 ° C (Experimental Example 6), and 275 ° C (Experimental Example 7) for 5 minutes. did. Next, after cooling, the connected pipe joints 1a and 1'are disassembled and further diagonally tightened until the entire joint surfaces 2c come into contact with each other and then reassembled. Surface 2
The presence or absence of air leakage from c was tested. As a result, no air leak was detected.
【００１６】（実験例８）実験例５と同様にして、接続
された各管継手１ａ，１′を恒温槽を用いて３００℃で
１０分間加熱した。次に、水槽（図示せず）に浸して、
急冷させた後、接合面２ｃからの空気の漏れの有無を試
験した。この結果、空気の漏れは検出されなかった。次
に、分解・再組み込みした後、やはり実験例１と同様に
して、接合面２ｃからの空気の漏れの有無を試験した。
この結果、若干の空気の漏れが検出された。これは、急
冷の際に、接合面が変形したためであると考えられる。
しかしながら、この漏れは環状溝の直径等を調整し、接
合面の弾性変形量を調整することにより、解決された。
また、溶接等による接合の際の熱の影響はみられないこ
とがわかった。(Experimental Example 8) In the same manner as in Experimental Example 5, each of the connected pipe joints 1a and 1'was heated at 300 ° C for 10 minutes using a constant temperature bath. Next, immerse in a water tank (not shown),
After quenching, the presence or absence of air leakage from the joint surface 2c was tested. As a result, no air leak was detected. Next, after disassembling and reassembling, the presence or absence of air leakage from the joint surface 2c was tested in the same manner as in Experimental Example 1.
As a result, some air leakage was detected. It is considered that this is because the joint surface was deformed during the rapid cooling.
However, this leakage was solved by adjusting the diameter of the annular groove and the like and adjusting the elastic deformation amount of the joint surface.
Moreover, it was found that the influence of heat upon joining by welding or the like was not observed.
【００１７】（実験例９）実験例１と同様にして試験体
を作製し、２０mmHgまで減圧にし、次いで減圧下２４時
間放置した後、気密性を確認したが、圧力は変化しなか
った。(Experimental Example 9) A test piece was prepared in the same manner as in Experimental Example 1, depressurized to 20 mmHg, and allowed to stand under reduced pressure for 24 hours. After confirming hermeticity, the pressure did not change.
【００１８】以上のように本実施例によれば、つば部の
内周面に環状溝を形成することによって、接合面に軸方
向の弾力性を付与させることができ、これにより、特に
軸方向の弾性変形量の大きな内周面近傍に形成された凸
条部は、接触される相手側の接合面に応じて柔軟に対応
することができ、シール性を有することができる。ま
た、水等の流体が流動されると、環状溝内に流体の圧力
がかかり、かつ接合面の復元力も加わって接合面に相手
側に向かって押される力が働くので、さらにシール性を
著しく向上させることができる。したがって、配管作業
中、接合面の平行度にさほど注意を払う必要等がなく容
易に接合面を密着させることができ、また、振動等が負
荷されてもこの振動に凸条部が追随して常に接合面を密
着させることができる。この結果、シール材等を不要に
することができる。As described above, according to this embodiment, by forming the annular groove on the inner peripheral surface of the collar portion, the joint surface can be given elasticity in the axial direction. The ridge portion formed in the vicinity of the inner peripheral surface having a large elastic deformation amount can flexibly correspond to the mating surface of the mating side to be contacted, and can have a sealing property. Further, when a fluid such as water flows, the pressure of the fluid is applied to the annular groove, and the restoring force of the joint surface is added to the joint surface, which pushes the joint surface toward the other side. Can be improved. Therefore, during piping work, it is not necessary to pay much attention to the parallelism of the joint surfaces, and the joint surfaces can be easily brought into close contact with each other, and even if vibration is applied, the ridges follow this vibration. The joint surface can always be adhered. As a result, a sealing material or the like can be eliminated.
【００１９】（実施例２）図３（ａ）は本発明の第２実
施例における管継手の全体斜視図であり、図３（ｂ）は
その断面図である。２は継手部、２ａはつば部、２ｂは
内周面、２ｃは接合面、２ｄはボルト挿通孔、３ａは環
状溝、４は凸条部であり、これらは実施例１と同様なも
のなので同一の符号を付して説明を省略する。実施例１
と異なるのは、本発明の第１実施例における管継手１ｂ
が、つば部２ａの内周面２ｂに環状溝３ａより奥側に内
周面２ｂと同軸状に形成されかつ直径が環状溝３ａの直
径より大きくされた環状溝３ｂを備えた点と、接合面２
ｃ側の環状溝３ａが凸条部４，４の中間の深さに形成さ
れ、奥側の環状溝３ｂが最外側の凸条部４よりも深く形
成されている点である。管継手１ｂのつば部２ａの厚み
が厚いときや接合面２ｃの幅が広い大口径の場合は、凸
条部４の数や環状溝３の数は増やしてもよい。(Embodiment 2) FIG. 3 (a) is an overall perspective view of a pipe joint in a second embodiment of the present invention, and FIG. 3 (b) is a sectional view thereof. Reference numeral 2 is a joint portion, 2a is a brim portion, 2b is an inner peripheral surface, 2c is a joining surface, 2d is a bolt insertion hole, 3a is an annular groove, and 4 is a ridge portion. These are the same as those in the first embodiment. The same reference numerals are given and the description is omitted. Example 1
Is different from the pipe joint 1b in the first embodiment of the present invention.
However, the inner peripheral surface 2b of the collar portion 2a is provided with an annular groove 3b formed on the inner side of the annular groove 3a coaxially with the inner peripheral surface 2b and having a diameter larger than that of the annular groove 3a. Surface 2
This is that the c-side annular groove 3a is formed at a middle depth between the ridges 4 and 4, and the back-side annular groove 3b is formed deeper than the outermost ridge 4. When the flange portion 2a of the pipe joint 1b has a large thickness or the joint surface 2c has a large width, the number of the ridge portions 4 and the number of the annular grooves 3 may be increased.
【００２０】以上のように本実施例によれば、つば部の
内周面に２個の環状溝を有し、かつ内側の環状溝の直径
を接合面側に位置する環状溝の直径より大きくしたの
で、接合面の弾性変形量を大きくすることができる。こ
れにより、接合面の内周面側がさらに相手側の接合面の
加圧力に応じて変形すると同時に復元力により相手側の
接合面に押し付ける力が生じ、さらにシール性をよくす
ることができる。更に環状溝の深さが各々の凸条部に対
応しているので、弾性変形量を物理的に制御でき高い流
体の圧力変動にも十分対応できる高いシール性を確保す
ることができる。As described above, according to this embodiment, the inner peripheral surface of the collar portion has two annular grooves, and the diameter of the inner annular groove is larger than the diameter of the annular groove located on the joint surface side. Therefore, the amount of elastic deformation of the joint surface can be increased. As a result, the inner peripheral surface side of the joint surface is further deformed in accordance with the pressing force of the mating joint surface, and at the same time, a force that presses against the mating joint surface due to the restoring force is generated, and the sealing property can be further improved. Further, since the depth of the annular groove corresponds to each ridge, it is possible to physically control the amount of elastic deformation and ensure a high sealing property that can sufficiently cope with high fluid pressure fluctuations.
【００２１】（実施例３）図４（ａ）は本発明の第３実
施例における管継手の全体斜視図であり、図４（ｂ）は
その断面図であり、図４（ｃ）はその要部拡大断面図で
ある。２は継手部、２ａはつば部、２ｂは内周面、２ｃ
は接合面、２ｄはボルト挿通孔、３ａは環状溝であり、
これらは実施例１と同様なものなので同一の符号を付し
て説明を省略する。実施例１と異なるのは、本発明の第
３実施例における管継手１ｃが、接合面２ｃに形成され
た小平面座２ｅの内周面２ｂの近傍に内周面２ｂと同軸
状に形成された２個の凹条部１０を備えた点である。各
凹条部１０は、Ｏリング等のガスケット（図示せず）を
配設されるか、第２実施例の凸条部と内接されるように
形成される。(Embodiment 3) FIG. 4 (a) is an overall perspective view of a pipe joint in a third embodiment of the present invention, FIG. 4 (b) is a sectional view thereof, and FIG. It is a principal part expanded sectional view. 2 is a joint portion, 2a is a collar portion, 2b is an inner peripheral surface, 2c
Is a joint surface, 2d is a bolt insertion hole, 3a is an annular groove,
Since these are the same as those in the first embodiment, the same reference numerals are given and the description thereof is omitted. The difference from the first embodiment is that the pipe joint 1c in the third embodiment of the present invention is formed coaxially with the inner peripheral surface 2b in the vicinity of the inner peripheral surface 2b of the small plane seat 2e formed on the joint surface 2c. The point is that it has two concave streak portions 10. Each groove 10 is provided with a gasket (not shown) such as an O-ring, or is formed so as to be inscribed in the groove of the second embodiment.
【００２２】以上のように本実施例によれば、凹条部に
配されたガスケットが、接触される接合面に応じて柔軟
に対応して、常にあたりをとって、シール性を有するこ
とができる。As described above, according to the present embodiment, the gasket arranged in the recessed portion can flexibly respond to the contact surface to be contacted, and always has a contact and has a sealing property. it can.
【００２３】（実施例４）図５（ａ）は本発明の第４実
施例における管継手の全体斜視図であり、図５（ｂ）は
その断面図である。２は継手部、２ｂは開口部、３ａは
環状溝、４は凸条部であり、これらは実施例１と同様な
ものなので同一の符号を付して説明を省略する。１ｄは
本発明の第４実施例における管継手、２ａは継手部２の
周壁から鉛直方向及び軸方向に延設されたつば部、２ｃ
はつば部２ａに形成された接合面、２ｅ′はつば部２ａ
の外周壁に形成された螺状部である。(Embodiment 4) FIG. 5 (a) is an overall perspective view of a pipe joint in a fourth embodiment of the present invention, and FIG. 5 (b) is a sectional view thereof. Reference numeral 2 is a joint portion, 2b is an opening portion, 3a is an annular groove, and 4 is a ridge portion. Since these are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted. 1d is a pipe joint in the fourth embodiment of the present invention, 2a is a collar portion extending vertically and axially from the peripheral wall of the joint portion 2, and 2c.
Joint surface 2e 'formed on the collar portion 2a, 2e' collar portion 2a
Is a spiral portion formed on the outer peripheral wall of the.
【００２４】以上のように構成された本実施例の管継手
について、以下その使用方法を図面を参照しながら説明
する。図６（ａ）は他方の管継手の全体斜視図であり、
図６（ｂ）はその断面図である。１″は管継手、２ａ′
は継手部２の周壁から延設されたつば部、２ｂは内周
面、２ｃ′はつば部２ａ′に形成された接合面、２ｅ″
はつば部２ａ′の外周壁に形成された螺状部である。ま
ず、管継手１ｄ，１″の接合面２ｃ，２ｃ′同士を突き
合わせる。次に、袋状ナット（図示せず）を各螺状部２
ｅ′，２ｅ″に螺合して締め付ける。With respect to the pipe joint of the present embodiment having the above-mentioned structure, its usage will be described below with reference to the drawings. FIG. 6A is an overall perspective view of the other pipe joint,
FIG. 6B is a sectional view thereof. 1 ″ is a pipe joint, 2a ′
Is a collar portion extending from the peripheral wall of the joint portion 2, 2b is an inner peripheral surface, 2c 'is a joint surface formed on the collar portion 2a', 2e ".
It is a threaded portion formed on the outer peripheral wall of the collar portion 2a '. First, the joint surfaces 2c, 2c 'of the pipe joints 1d, 1 "are butted against each other. Next, a cap nut (not shown) is attached to each threaded portion 2".
Tighten by screwing to e ', 2e ".
【００２５】以上のように本実施例によれば、内周面に
継手部と同軸状に形成された環状溝と、接合面に継手部
と同軸状に形成された２個の凸条部を備えたので、接合
面が相手側の接合面に追従して変形することができ、シ
ール材等を要することなく、高い密封精度で接続するこ
とができる。As described above, according to this embodiment, the annular groove formed coaxially with the joint portion on the inner peripheral surface and the two ridges formed coaxially with the joint portion on the joint surface are provided. Since it is provided, the joint surface can be deformed following the joint surface of the other side, and the connection can be performed with high sealing accuracy without requiring a sealing material or the like.
【００２６】（実施例５）図７（ａ）は本発明の第５実
施例における管継手を有するバルブの断面図であり、図
７（ｂ）はその管継手の要部斜視図である。２ｂは内周
面、２ｃ″は接合面、２ｄはボルト挿通孔、３ａは環状
溝、４は凸条部であり、これらは実施例１と同様なもの
なので同一の符号を付して説明を省略する。１ｅはバル
ブ１１の導入口側及び排出口側に各々形成された本発明
の第５実施例における管継手、２′はバルブ１１の導入
口側及び排出口側の継手部、２ａ″は継手部２′の周壁
に平面六角形状に形成されたつば部である。(Embodiment 5) FIG. 7 (a) is a sectional view of a valve having a pipe joint according to a fifth embodiment of the present invention, and FIG. 7 (b) is a perspective view of an essential portion of the pipe joint. Reference numeral 2b is an inner peripheral surface, 2c ″ is a joint surface, 2d is a bolt insertion hole, 3a is an annular groove, and 4 is a ridge portion. Since these are the same as those in the first embodiment, the same reference numerals are given and described. 1e is a pipe joint in the fifth embodiment of the present invention formed on the inlet side and the outlet side of the valve 11, 2'is a joint portion on the inlet side and the outlet side of the valve 11, 2a ". Is a flange portion formed in a planar hexagonal shape on the peripheral wall of the joint portion 2 '.
【００２７】以上のように本実施例によれば、内周面に
継手部と同軸状に形成された環状溝と、接合面に継手部
と同軸状に形成された２個の凸条部を備えたので、接合
面が相手側の接合面に追従して変形することができ、シ
ール性を有することができ、シール材等を不要とするこ
とができる。As described above, according to this embodiment, the annular groove formed coaxially with the joint portion on the inner peripheral surface and the two ridge portions coaxially formed with the joint portion on the joint surface are provided. Since it is provided, the joint surface can be deformed following the mating joint surface, can have sealing properties, and a sealing material or the like can be eliminated.
【発明の効果】以上のように本発明によれば、以下の優
れた効果を奏する。すなわち、 （１）つば部の内周面に内周面と同軸状に形成された１
乃至複数の環状溝を備えたので、これにより、接合面に
弾力性を付与することができ、ガスケットを介して相手
側の管継手に接触したとき、この接合面が相手側の接合
面形状やガスケットの形状に追従して変形することがで
きる。その結果、極めて高いシール性を有することがで
きる。また、管継手内に液体や気体等の流体が流動され
たり、又は減圧にされたりすると、環状溝内にこの流体
による内圧がかかり、この内圧と接合面の復元力によっ
てさらにシール性をよくすることができる。これによ
り、高い密封精度を得ることができるので、信頼性や施
工性に優れた管継手を実現することができる。 （２）つば部の接合面に内周面と同軸状に形成された１
乃至複数の凸条部を備えた場合、この凸条部でガスケッ
トや相手側の接合面とのあたりをとることができるの
で、高い密封精度を得ることができ、信頼性や施工性に
優れた管継手を実現することができる。 （３）つば部の内周面に形成された環状溝と、つば部の
接合面に形成されかつ直径が前記環状溝の直径より小さ
くされた凸条部を備えた場合、凸条部でガスケットや相
手側の接合面とのあたりをとることができ、さらに凸条
部の部位の弾性変形量が大きいので、ガスケットや相手
側の接合面に対する応答性や追従性をさらに向上させる
ことができ、高い密封精度を得ることができる信頼性や
施工性に優れた管継手を実現することができる。 （４）つば部の内周面に形成された環状溝と、つば部の
接合面に形成されかつ直径が前記環状溝の直径より小さ
くされた凹条部を備えた場合、凹条部内に配設されたＯ
リング等が相手側の接合面とのあたりをとることがで
き、さらに凹条部の部位の弾性変形量が大きいので、ガ
スケットや相手側の接合面に対する応答性や追従性をさ
らに向上させることができる。さらに、相手側の接合面
が大平面座や小平面座とされていてもＯリング等がこれ
ら大平面座や小平面座に対するあたりをとることができ
る。したがって、高い密封精度を得ることができ、信頼
性や施工性に優れた管継手を実現することができる。 （５）一方の管継手の接合面に凸条部を形成し、他方の
管継手の接合面に前記凸条部と内接する凹条部を形成し
た場合、凸条部と凹条部とが内接されることにより、高
い密封精度を得ることができる。これにより、信頼性や
施工性に優れた管継手を実現することができる。 （６）一方の管継手の接合面に凸条部と内周面に環状溝
を形成し、他方の管継手の接合面に前記凸条部と内接す
る凹条部を形成した場合、凸条部と凹条部とが内接さ
れ、かつ接触時の負荷によって凸条部の部位が弾性変形
するのでさらに高い密封精度を得ることができる。これ
により、相手側の接合面に対する応答性や追従性をさら
に向上させることができ、信頼性や施工性に優れた管継
手を実現することができる。 （７）一方の管継手の接合面に凸条部と内周面に環状溝
を形成し、他方の管継手の接合面に前記凸条部と内接す
る凹条部と内周面に環状溝を形成した場合、凸条部と凹
条部とが内接され、かつ接触時の負荷によって凸条部や
凹条部の部位が弾性変形するのでさらに高い密封精度を
得ることができる。これにより、相手側の接合面に対す
る応答性や追従性をさらに向上させることができ、信頼
性や施工性に優れた管継手を実現することができる。 （８）管継手が、前記環状溝，前記凸条部及び／又は前
記凹条部を備えたフランジ継手である場合、接合面を、
接触される相手側の接合面に応じて弾性変形させること
ができるので、ボルト等によって締め付けるとき、対角
締め等しなくても、良好なシール性を得ることができ、
この結果、シール材等を要することなく、常に高い密封
精度を得ることができる信頼性や施工性に優れた管継手
を実現することができる。 （９）管継手が、前記環状溝，前記凸条部及び／又は前
記凹条部を備えたユニオン継手である場合、接合面を、
接触される相手側の接合面に応じて弾性変形させること
ができるので、袋状ナット等によって締め付けるとき、
良好なシール性を得ることができ、この結果、シール材
等を要することなく、常に高い密封精度を得ることがで
きる信頼性や施工性に優れた管継手を実現することがで
きる。As described above, the present invention has the following excellent effects. That is, (1) 1 formed on the inner peripheral surface of the collar portion coaxially with the inner peripheral surface
Through the provision of a plurality of annular grooves, it is possible to impart elasticity to the joint surface, and when the joint surface comes into contact with the mating pipe joint through the gasket, the joint surface has a mating surface shape of the mating side or It can be deformed following the shape of the gasket. As a result, it is possible to have extremely high sealing properties. Further, when a fluid such as a liquid or a gas flows in the pipe joint or is decompressed, an internal pressure due to this fluid is applied to the annular groove, and the sealability is further improved by the internal pressure and the restoring force of the joint surface. be able to. As a result, high sealing accuracy can be obtained, so that a pipe joint excellent in reliability and workability can be realized. (2) 1 formed coaxially with the inner peripheral surface on the joint surface of the collar portion
When a plurality of ridges are provided, the ridges can reach the gasket and the mating surface of the mating side, so that high sealing accuracy can be obtained and reliability and workability are excellent. A pipe joint can be realized. (3) In the case where the annular groove formed on the inner peripheral surface of the collar portion and the ridge portion formed on the joint surface of the collar portion and having a diameter smaller than the diameter of the annular groove, the gasket is formed by the ridge portion. And the mating surface of the mating side, and since the amount of elastic deformation of the ridge portion is large, it is possible to further improve the responsiveness and followability to the gasket and the mating surface of the mating side. It is possible to realize a pipe joint excellent in reliability and workability that can obtain high sealing accuracy. (4) In the case where the annular groove formed on the inner peripheral surface of the collar portion and the groove portion formed on the joint surface of the collar portion and having a diameter smaller than the diameter of the annular groove are arranged in the groove portion. Set O
The ring and other parts can come into contact with the mating surface of the mating side, and the amount of elastic deformation of the recessed portion is large, so it is possible to further improve the responsiveness and followability to the gasket and mating surface of the mating side. it can. Furthermore, even if the mating surface on the mating side is a large plane seat or a small plane seat, the O-ring or the like can hit the large plane seat or the small plane seat. Therefore, high sealing accuracy can be obtained, and a pipe joint excellent in reliability and workability can be realized. (5) In the case where a ridge portion is formed on the joint surface of one pipe joint and a concave ridge portion inscribed in the ridge portion is formed on the joint surface of the other pipe joint, the ridge portion and the ridge portion are By being inscribed, high sealing accuracy can be obtained. As a result, a pipe joint with excellent reliability and workability can be realized. (6) When a ridge portion and an annular groove are formed on the joint surface of one pipe joint and an annular groove on the inner peripheral surface, and a groove portion inscribed in the ridge portion is formed on the joint surface of the other pipe joint, Since the portion and the concave streak are inscribed and the portion of the convex streak is elastically deformed by the load at the time of contact, higher sealing accuracy can be obtained. As a result, it is possible to further improve the responsiveness and followability to the mating surface on the mating side, and it is possible to realize a pipe joint excellent in reliability and workability. (7) An annular groove is formed on the joint surface of one of the pipe joints, and an annular groove is formed on the joint surface of the other pipe joint, and a groove is inscribed on the joint surface of the other pipe joint and the annular groove is formed on the inner peripheral surface. When the ridge is formed, the ridges and the ridges are inscribed and the load of the contact elastically deforms the ridges and the ridges, so that higher sealing accuracy can be obtained. As a result, it is possible to further improve the responsiveness and followability to the mating surface on the mating side, and it is possible to realize a pipe joint excellent in reliability and workability. (8) When the pipe joint is a flange joint provided with the annular groove, the convex strip portion and / or the concave strip portion, the joint surface is
Since it can be elastically deformed according to the mating surface of the mating side to be contacted, good tightening performance can be obtained without tightening diagonally when tightening with bolts, etc.
As a result, it is possible to realize a pipe joint excellent in reliability and workability that can always obtain high sealing accuracy without requiring a sealing material or the like. (9) In the case where the pipe joint is a union joint including the annular groove, the convex strip portion and / or the concave strip portion, the joint surface is
Since it can be elastically deformed according to the mating surface of the other side that comes into contact, when tightening with a bag nut etc.
A good sealability can be obtained, and as a result, a pipe joint excellent in reliability and workability that can always obtain high sealing accuracy without requiring a sealing material or the like can be realized.
【図１】（ａ）本発明の第１実施例における管継手の全
体斜視図 （ｂ）本発明の第１実施例における管継手の断面図 （ｃ）本発明の第１実施例における管継手の要部拡大断
面図1A is an overall perspective view of a pipe joint according to a first embodiment of the present invention, FIG. 1B is a sectional view of a pipe joint according to a first embodiment of the present invention, and FIG. 1C is a pipe joint according to a first embodiment of the present invention. Enlarged sectional view of the main part of
【図２】シール性能の評価試験を示す模式図FIG. 2 is a schematic diagram showing a seal performance evaluation test.
【図３】（ａ）本発明の第２実施例における管継手の全
体斜視図 （ｂ）本発明の第２実施例における管継手の断面図FIG. 3 (a) is an overall perspective view of a pipe joint in a second embodiment of the present invention. (B) A sectional view of a pipe joint in a second embodiment of the present invention.
【図４】（ａ）本発明の第３実施例における管継手の全
体斜視図 （ｂ）本発明の第３実施例における管継手の断面図 （ｃ）本発明の第３実施例における管継手の要部拡大断
面図FIG. 4 (a) is an overall perspective view of a pipe joint in a third embodiment of the present invention (b) is a sectional view of a pipe joint in a third embodiment of the present invention (c) is a pipe joint in a third embodiment of the present invention Enlarged sectional view of the main part of
【図５】（ａ）本発明の第４実施例における管継手の全
体斜視図 （ｂ）本発明の第４実施例における管継手の断面図5A is an overall perspective view of a pipe joint in a fourth embodiment of the present invention. FIG. 5B is a sectional view of a pipe joint in a fourth embodiment of the present invention.
【図６】（ａ）他方の管継手の全体斜視図 （ｂ）他方の管継手の断面図FIG. 6A is an overall perspective view of the other pipe joint, and FIG. 6B is a cross-sectional view of the other pipe joint.
【図７】（ａ）本発明の第５実施例における管継手を有
するバルブの断面図 （ｂ）本発明の第５実施例における管継手の要部斜視図FIG. 7 (a) is a sectional view of a valve having a pipe joint according to a fifth embodiment of the present invention. FIG. 7 (b) is a perspective view of a main portion of the pipe joint according to the fifth embodiment of the present invention.
【図８】（ａ）従来の管継手の１つであるフランジ継手
の全体斜視図 （ｂ）従来の管継手の１つであるフランジ継手の断面図FIG. 8A is an overall perspective view of a flange joint that is one of conventional pipe joints. FIG. 8B is a cross-sectional view of a flange joint that is one of conventional pipe joints.
１ａ，１ｂ，１ｃ，１ｄ，１ｅ，１′，１″ 管継手 ２，２′ 継手部 ２ａ，２ａ′，２ａ″ つば部 ２ｂ 内周面 ２ｃ，２ｃ′，２ｃ″ 接合面 ２ｄ ボルト挿通孔 ２ｅ 小平面座 ２ｅ′，２ｅ″ 螺状部 ３ａ，３ｂ 環状溝 ４ 凸条部 ５ ボルト ６ ナット ７ 支管部 ８ 水槽 ９ 水 １０ 凹条部 １１ バルブ 1a, 1b, 1c, 1d, 1e, 1 ', 1 "pipe joint 2,2' joint portion 2a, 2a ', 2a" collar portion 2b inner peripheral surface 2c, 2c', 2c "joint surface 2d bolt insertion hole 2e Small plane seat 2e ′, 2e ″ Screw-shaped part 3a, 3b Annular groove 4 Convex ridge 5 Bolt 6 Nut 7 Branch pipe 8 Water tank 9 Water 10 Recessed ridge 11 Valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 名川 政人 福岡県北九州市小倉南区舞ヶ丘三丁目12− ２ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masato Nagawa 3-12-2 Maigaoka, Kokuraminami-ku, Kitakyushu City, Fukuoka Prefecture
Claims (8)
成された１乃至複数の環状溝を備えたことを特徴とする
管継手。1. A pipe joint comprising an inner peripheral surface of a collar portion and one or a plurality of annular grooves formed coaxially with the inner peripheral surface.
に形成された１乃至複数の凸条部を備えたことを特徴と
する請求項１に記載の管継手。2. The pipe joint according to claim 1, wherein the joint surface of the collar portion is provided with one or a plurality of ridges formed coaxially with the inner peripheral surface.
に形成された１乃至複数の凹条部を備えたことを特徴と
する請求項１に記載の管継手。3. The pipe joint according to claim 1, wherein the joint surface of the collar portion is provided with one or a plurality of recessed portions formed coaxially with the inner peripheral surface.
ケットを備えたことを特徴とする請求項３に記載の管継
手。4. The pipe joint according to claim 3, further comprising a gasket such as an O-ring arranged in the groove.
環状溝の直径より小さいことを特徴とする請求項１乃至
４の内いずれか１に記載の管継手。5. The pipe joint according to any one of claims 1 to 4, wherein the diameters of the convex stripes and the concave stripes are smaller than the diameter of the annular groove.
置する前記環状溝の直径が、他の前記環状溝の直径より
小さいことを特徴とする請求項１乃至５の内いずれか１
に記載の管継手。6. The diameter of the annular groove located on the joint surface side among the plurality of annular grooves is smaller than the diameter of the other annular grooves. 1
The pipe joint according to 1.
特徴とする請求項１乃至６の内いずれか１に記載の管継
手。7. The pipe joint according to claim 1, wherein the pipe joint is a flange joint.
特徴とする請求項１乃至６の内いずれか１に記載の管継
手。8. The pipe joint according to claim 1, wherein the pipe joint is a union joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6340277A JP2849345B2 (en) | 1994-12-31 | 1994-12-31 | Pipe fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6340277A JP2849345B2 (en) | 1994-12-31 | 1994-12-31 | Pipe fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08184393A true JPH08184393A (en) | 1996-07-16 |
| JP2849345B2 JP2849345B2 (en) | 1999-01-20 |
Family
ID=18335404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6340277A Expired - Lifetime JP2849345B2 (en) | 1994-12-31 | 1994-12-31 | Pipe fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2849345B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055015A (en) * | 1998-08-06 | 2000-02-22 | Fuji Xerox Co Ltd | Junction part structure |
| US6123339A (en) * | 1997-05-20 | 2000-09-26 | Daiso Corporation | Non-gasket sealing structure |
| KR100424335B1 (en) * | 2002-01-17 | 2004-04-01 | 조종래 | The forming method of pipe fitting by using local rapid heating |
| JP2009006392A (en) * | 2007-06-29 | 2009-01-15 | Yumex Corp | Method of forming flange joint with cylinder part, and flange joint with cylindrical part |
| JP2010156419A (en) * | 2008-12-26 | 2010-07-15 | Yokohama Rubber Co Ltd:The | Flange joint |
| JP2010156420A (en) * | 2008-12-26 | 2010-07-15 | Yokohama Rubber Co Ltd:The | Flange coupling |
| JP2010190313A (en) * | 2009-02-18 | 2010-09-02 | National Institute Of Advanced Industrial Science & Technology | Flange and joint made of extra-low carbon stainless steel and sealing valve element made of extra-low carbon stainless steel |
| JP2011503450A (en) * | 2007-11-02 | 2011-01-27 | インテグリス・インコーポレーテッド | Integrated face seal |
| JP2011058525A (en) * | 2009-09-08 | 2011-03-24 | Ud Trucks Corp | Connecting method of member with flange, and member with flange |
-
1994
- 1994-12-31 JP JP6340277A patent/JP2849345B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123339A (en) * | 1997-05-20 | 2000-09-26 | Daiso Corporation | Non-gasket sealing structure |
| JP2000055015A (en) * | 1998-08-06 | 2000-02-22 | Fuji Xerox Co Ltd | Junction part structure |
| KR100424335B1 (en) * | 2002-01-17 | 2004-04-01 | 조종래 | The forming method of pipe fitting by using local rapid heating |
| JP2009006392A (en) * | 2007-06-29 | 2009-01-15 | Yumex Corp | Method of forming flange joint with cylinder part, and flange joint with cylindrical part |
| JP2011503450A (en) * | 2007-11-02 | 2011-01-27 | インテグリス・インコーポレーテッド | Integrated face seal |
| JP2010156419A (en) * | 2008-12-26 | 2010-07-15 | Yokohama Rubber Co Ltd:The | Flange joint |
| JP2010156420A (en) * | 2008-12-26 | 2010-07-15 | Yokohama Rubber Co Ltd:The | Flange coupling |
| JP2010190313A (en) * | 2009-02-18 | 2010-09-02 | National Institute Of Advanced Industrial Science & Technology | Flange and joint made of extra-low carbon stainless steel and sealing valve element made of extra-low carbon stainless steel |
| JP2011058525A (en) * | 2009-09-08 | 2011-03-24 | Ud Trucks Corp | Connecting method of member with flange, and member with flange |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2849345B2 (en) | 1999-01-20 |
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