WO2013118346A1 - フランジ継手接続構造 - Google Patents
フランジ継手接続構造 Download PDFInfo
- Publication number
- WO2013118346A1 WO2013118346A1 PCT/JP2012/076155 JP2012076155W WO2013118346A1 WO 2013118346 A1 WO2013118346 A1 WO 2013118346A1 JP 2012076155 W JP2012076155 W JP 2012076155W WO 2013118346 A1 WO2013118346 A1 WO 2013118346A1
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- WIPO (PCT)
- Prior art keywords
- flange joint
- flange
- hole
- joint
- pressure pipe
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
Definitions
- the present invention relates to a flange joint connection structure that enables pressure pipes to be coupled without requiring welding at a pipe installation site.
- the flange-type flange joint includes a welded flange and a loose flange.
- both flanges are welded to pipe ends, and a sealing member is interposed between the flanges of both pipes.
- a welded flange is shown that bolts the flange.
- the flange used here is a so-called “plate flange”, and is an example of insertion welding in which the upper surface of the flange and the inside of the inner diameter of the flange are welded.
- Patent Document 1 also shows a loose flange-type pipe joint.
- Patent Document 5 shows an example in which a flange is fixed to a pipe with a screw.
- a pipe is inserted into the center of the flange and a screw is screwed into the pipe from the side surface of the flange to fix the pipe to the flange.
- the tip of the screw has an acute angle, and when the screw is screwed, the tip of the screw bites into the pipe.
- the technique disclosed in Patent Document 5 is a technique for pipes used in a vacuum-tight manner, and the pipes are pressed against each other at atmospheric pressure.
- Patent Documents 2 and 3 disclose a method of inserting pipes from both sides of a cylindrical joint and connecting the pipes. These are fixed by deforming the tube side with a tightening force of a bolt screwed along the radial direction to the peripheral wall of the tube accommodating the electric wire.
- the pipes connected by such bolts protect the internal electric wires, and unlike the fluid, the electric wires themselves do not have pressure or liquid leaks.
- Patent Document 4 discloses a technique for connecting rods with bolts, but as in Patent Documents 2 and 3, the rod side is deformed and fixed by the tightening force of the bolts.
- Patent Document 6 discloses a cylindrical sleeve that is covered so as to straddle pipes.
- the sleeve is provided with a through-hole into which a bolt is screwed toward the pipe.
- a fitting groove is provided on the pipe side for receiving the tip of the bolt without clearance. An appropriate pressure can be applied to the seal by fitting the bolt into the fitting groove while pressing the pipes with the seal sandwiched between the pipe end faces.
- Patent Document 5 is a technique for a pipe used in a vacuum-tight manner. When applied to a technique for handling a high-pressure fluid in which a tension is generated to try to separate the pipes from each other, the tip of the screw slips even a little on the pipe due to the tensile force. The compressive force stored in the wire gasket on the pipe end face disappears, and the high-pressure fluid in the pipe blows out.
- the method of tightening and fixing the pipe with the tightening force of the bolt screwed along the radial direction does not require work such as welding, but is used as a joint for pressure piping. In order to prevent the fluid in the pipe from leaking from the gap between the tubular joint and the pipe, it must be sealed.
- the present applicant has proposed a flange joint using bolts (hereinafter referred to as longitudinal bolts) screwed along the radial direction according to International Patent Application PCT / JP2011 / 74116. According to the present proposal, there is provided a joint that has a bonding strength stronger than that required for pressure piping in the JIS standard and has ensured sealing performance.
- An object of the present invention is to provide a bolt-type flange joint that facilitates workability at the installation site in a flange joint connection structure using bolts screwed along the radial direction.
- a flange that is connected on the outer peripheral surface between a surface on the side where the pressure pipe is inserted into the central hole and a surface connected to another component on the center line,
- a horizontal hole that is fastened by a horizontal bolt, the surface to be inserted, and the other part are connected through the space between the surface to be inserted and the surface to be connected to another part in parallel with the central hole. It is characterized by having a vertical hole that penetrates from the outer peripheral surface to the center hole and is provided with a thread on the inner wall so as to intersect the lateral hole.
- pressure pipes can be connected by bolts without using welding in piping work of pressure pipes that require tensile strength. Furthermore, the operation of connecting the bolts between the flanges can be performed as usual.
- FIG. 1 shows the flange joint 1 according to the first embodiment.
- the difference between the flange shown in FIG. 1A and the flange shown in FIG. 1B is that the vertical hole 6 (to be described later) of the flange joint 1 of FIG. 1A is provided on the same circumference, but the flange joint 1 of FIG.
- the vertical holes 6 are arranged such that their positions are shifted in the direction of the center line C.
- two-dot chain lines a 1, a 2, a 3, a 4, and a 5 indicate the center positions of the vertical holes 6, and two-dot chain lines b 1, b 2, b 3, b 4, and b 5 are depressions 41 ( The center position is described later.
- the flange joint 1 is a so-called plate flange and has a disk-like outer shape.
- a pressure pipe 40 is inserted into the flange joint 1 along the center line C.
- the left side of the drawing is the insertion side surface 2 into which the metal pressure pipe 40 is inserted, the right side is the connection side surface 3 that faces other components (other flanges), and both surfaces 2 and 3 are ring-shaped. And provided perpendicular to the center line C. These surfaces 2 and 3 are connected by a cylindrical outer peripheral surface 4.
- FIG. 2 shows a front surface (FIG. 2A), a side surface (FIG. 2B), and an XX cross section (FIG. 2C) when the surface 2 on the insertion side of the flange joint 1 shown in FIG. 1A is the front surface.
- the roughness of the connection-side surface 3 is adjusted so as not to damage the sealing material (see FIG. 3). Roughness adjustment is not necessary.
- the left surface 2 is referred to as a plug-in surface 2 and the right surface 3 is referred to as a connection-side surface 3. good.
- the flange joint 1 has a central hole 10 into which the pressure pipe 40 is inserted.
- the central hole 10 is a circular cavity centered on the center line C of the flange joint 100.
- the inner peripheral surface 5 forming the central hole 10 passes through the surfaces 2 and 3 on both sides of the flange joint 1 with the same inner diameter.
- the flange joint 1 has holes 6 penetrating from the outer peripheral surface 4 to the inner peripheral surface 5 toward the center of the flange joint 1 at equal angular intervals.
- a screw thread 6 b is provided on the wall surface of the hole 6. As will be described later, the bolt 20 that is screwed into the screw thread 6b of the hole 6 is not provided with the screw thread 23 in the range T of the tip portion of the cylindrical tail portion 21.
- the hole 6 is a hole perpendicular to the center line C of the flange joint 1, it is referred to as a vertical hole, and the bolt 20 screwed into the vertical hole 6 is similarly screwed toward the center. Since they are combined, they will be referred to as vertical bolts 20.
- the flange joint 1 is further provided with a hole 7 parallel to the central hole 10.
- the hole 7 is not provided with a screw thread.
- This hole 7 is referred to as a horizontal hole 7 in order to distinguish it from the vertical hole 6.
- the lateral hole 7 is a hole through which the bolt penetrates when the flange joints 1 are coupled to each other with a bolt 30 (see FIG. 3; hereinafter referred to as the lateral bolt 30) and a nut.
- the horizontal hole 7 penetrates from the insertion-side surface 2 to the connection-side surface 3 of the flange joint 1, while the vertical hole 6 is between the insertion-side surface 2 and the connection-side surface 3. It is provided so as to intersect with the lateral hole 7.
- a non-penetrating recess 41 having a circular cross section is provided at a position where the vertical hole 6 faces directly.
- a tail portion not provided with a screw thread is fitted into the bottomed recess 41.
- FIG. 3 shows a front surface (FIG. 3A), a side surface (FIG. 3B), and an XX cross section (FIG. 3C) when the surface 2 on the insertion side of the flange joint 1 shown in FIG. 1B is the front surface.
- the vertical hole 6 of the flange joint 1 and the depression 41 of the pressure pipe are arranged with their positions shifted in the direction of the center line C.
- the end surface 42 of the pressure pipe 40 whose length is adjusted is inserted into the central hole 10 from the surface 2 on the insertion side.
- the end surface 42 is preferably positioned so as to be flush with the connection-side surface 3.
- the position of the pressure pipe 40 corresponding to the position of the bolt hole is marked.
- the pressure pipe 40 is removed from the flange joint 1 and a dent 41 is provided at the marked position.
- the depth of the dent 41 is a depth that does not exceed the thickness of the pressure pipe 40, and the shape of the dent 41 is a cylindrical shape in which the range T of the tail 21 of the vertical bolt 20 fits without a gap. .
- the pressure pipe 40 is pushed into the flange joint 1, and the relative position between the pressure pipe 40 and the flange joint 1 is returned to the state when it was marked. Thereafter, the vertical bolt 20 is screwed into the vertical hole 6, the vertical hole 6 is passed through, the tail portion 21 is fitted into the recess 41, and tightened.
- the insert 60 shown in FIG. 5A has a ring shape and has annular surfaces 61 and 62 orthogonal to the center line C.
- One annular ring groove 63, 64 is formed in each annular surface 61, 62.
- the O-ring 65 is fitted in each of the ring grooves 63 and 64.
- the depth of the ring groove is set to such a depth that the O-ring 65 does not protrude from the ring grooves 63 and 64 when an appropriate compressive force is applied by a lateral bolt and nut.
- the edge part surface 42 of the pressure piping 40 and the surface 3 of the connection side of the flange joint 1 are set to the same plane. By doing so, when the annular surfaces 61 and 62 come into contact with the end surface 42 of the pressure pipe 40, the O-ring 65 is compressed with an appropriate compressive force.
- the insert 70 shown in FIG. 5C is different from the insert 60 in that step-like grooves 73 and 74 having no wall on one side are provided instead of the ring grooves 63 and 64.
- the outer diameter of the insert 70 is equal to the inner diameter of the central hole 10 on the seal surface side of the flange joint 1.
- FIG. 5D when the end surface 42 of the pressure pipe 40 is set inward from the connection side surface 3 of the flange joint 1, the outer peripheral surface 75 of the insert 70 just enters the central hole 10. It has become.
- the flange joint shown in FIG. 6 has an extension 91 formed by extending a hub h that is protruded from the insertion surface side of the conventional hub flange and welded with a pressure pipe, and a vertical hole 6 is provided in the extension 91.
- Flange joint 90 In the flange joint 90 having such a configuration, as shown in FIG. 6A, after the pressure pipe 40 is fixed to the extension portion 91 with the vertical bolt 20, the horizontal bolt 30 is inserted into the horizontal hole 7 as shown in FIG. When trying to do so, the head 22 of the vertical bolt 20 interferes with the work area of the horizontal bolt tightening work. Moreover, the heads of the vertical bolts 20 and the horizontal bolts 30 are in a dense state.
- the head 22 of the vertical bolt 20 surrounds the outer peripheral surface 4 between the insertion-side surface 2 and the connection-side surface 3 in a donut shape. Therefore, it can be operated in the same manner as a conventional welded flange joint without interfering with the fastening operation of the lateral bolt 30.
- the bolt 20 may have a screw thread up to the tip including the range T of the tail portion 21. In this case, when the bolt 20 is fitted into the recess 41, the ridge portion of the screw thread of the bolt 20 hits the recess 41.
- the vertical hole 6 of the flange joint 1 of FIG. 1B is arranged with its position shifted in the direction of the center line C.
- the vertical hole 6 is arranged with its position shifted in the direction of the center line C as in the flange joint 1 of FIG. 1B. This is a method of shifting so that the vertical hole 6 is arranged so as to draw a spiral in the clockwise direction at the center of the center line C over the surface 3.
- the vertical holes arranged on the right side surface, the plane surface, the left side surface, and the bottom surface are shifted toward the connection-side surface 3 in the beginning. This deviation amount is shown as “j” in FIG.
- the openings of the vertical holes 6 overlap on the same circumference. This overlap is shown as “k” in FIG.
- the vertical holes may be arranged in the order of the right side surface, the left side surface, the bottom surface, and the plane without being arranged in the spiral order, and the way of shifting is arbitrary.
- the recess 41 provided in the pressure pipe 40 is also disposed at a position shifted from each other.
- the pressure pipe 40 is provided with the recess 41, so that the meat portion is lost and the strength is reduced.
- the flange joint 1 can be strengthened by setting the wall thickness separately from the diameter of the pressure pipe 40, but the wall thickness of the pressure pipe 40 cannot be changed.
- the position of the recess 41 provided in the pressure pipe is also shifted in the length direction, and on the same circumference of the pressure pipe by the recess 41 (for example, , The reduction in the thickness of the pressure pipe on the two-dot chain line b1) can be dispersed. As a result, the strength against pulling can be increased.
- the head of the vertical bolt 20 may be embedded in the outer peripheral surface of the flange joint.
- a vertical bolt 20 ′ shown in FIG. 8 is a plus screw having a head 22 ′, a tail 21 ′, and a body 23 ′ having the same diameter, and four notches r are formed on diagonal lines of the head 22 ′.
- the vertical hole 6 of the flange joint 100 is provided with a square recess 6a at the entrance thereof.
- FIG. 8B shows the detent 24.
- the detent 24 has a planar shape corresponding to the shape of the space formed between the square recess 6a and the head 22 'when the vertical bolt 20' is inserted into the vertical hole 6.
- the convex portion 24a of the rotation stopper 24 is inserted into the notch r of the head portion 22 '.
- the rotation stoppers 24 By fitting the rotation stoppers 24 into the four positions in the gap between the recess 6a and the head portion 22 ', the rotation of the vertical bolt 20' can be prevented. And it does not protrude from the outer peripheral surface 4 of the flange joint 100, the head of a vertical bolt can be protected, and the appearance after installation is also good.
- FIG. 9 shows a flange joint 200 connected by screwing a pressure pipe into the central hole.
- the flange joint 200 is a kind of a screw-in flange (sled flange).
- a screw thread 220 that draws a spiral around the center line C is provided in the center hole 210.
- the screw thread 220 here is not a so-called taper screw but a parallel screw.
- a screw thread (male screw) 43 that is screwed into a screw thread (female screw) of the central hole 210 is provided.
- the vertical hole 6 is provided, and the vertical bolt 20 is inserted into this and fitted into the recess 41 provided in the pressure pipe 40 (FIG. 9B).
- Connecting the bolt 30 and the nut 31 using the horizontal hole 7 is the same as the previous example (for example, FIG. 9D).
- the inlet 10a of the central hole 10 on the connection-side surface 3 is not provided with a screw thread of the central hole 210 as much as the outer peripheral surface 75 of the insert 70 enters.
- a flat curved surface centering on the line C is provided, and is fitted to the outer peripheral surface 75 of the insert 70.
- a screw thread is provided at the inlet 10a of the central hole 10 of the connection-side surface 3, and the pressure pipe 40 is screwed so that the end surface 42 is flush with the connection-side surface 3. May be included.
- the flange joint need not be a disc.
- it may be a square or another polygon.
- you may provide the hub seen by the hub flange of a welding type insertion flange in the surface by the side of insertion.
- the peripheral surface may be a smooth curved surface or a surface having irregularities.
- a vertical hole is provided at a position recessed on the center line side between the horizontal holes of the flange joint.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
この例においては、フランジの中央部にパイプが挿入され、フランジの側面からパイプに向けてネジを螺入してパイプをフランジに固定する例が示されている。この例では、螺子の先端が鋭角状であり、ネジが螺入されるとき、パイプにネジの先端が食い込む。特許文献5に示された技術は、真空気密に用いられるパイプに対する技術であり、パイプ同士は互いに大気圧で押さえ合う状態である。
特許文献6には、パイプ同士に跨るように被される筒状スリーブが開示されている。スリーブには、パイプに向けてボルトが螺入される透孔が設けられ、一方パイプ側には、ボルトの先端部をクリアランスの無い状態で受ける勘合溝が設けられている。シールをパイプ端面に挟んでパイプ同士を押し付けた状態で、ボルトを勘合溝に勘合させることにより、シールに対する適正な圧力を掛けた状態とすることができる。
そのようにしておけば、圧力配管40の端部面42に環状面61、62が当接したときに、Oリング65は適正な圧縮力で圧縮された状態になる。
2 差込側の面
3 接続側の面
4 外周面
5 内周面
6 縦孔
7 横孔
20 縦ボルト
30 横ボルト
Claims (5)
- 中心線上に揃えて圧力配管を中央孔に差し込む側の面と他の部品と接続する側の面との間を外周面で連結したフランジであって、前記中央孔と平行に前記差し込む側の面と他の部品と接続する側の面との間を貫通して、横ボルトにより締結される横孔と、前記差し込む側の面との他の部品と接続する側の面との間であって、前記横孔に交差するように、前記外周面から前記中央孔に貫通し、内壁に螺子山が設けられた縦孔を有するフランジ継手を有し、
前記フランジ継手の中央孔に差し込まれる圧力配管の外周面には、前記縦孔に対応する位置に有底の凹みが設けられており、
前記フランジ継手の縦孔に前記外周面から螺合されたボルトが、前記縦孔を貫通して前記凹み部に嵌合されていることを特徴とするフランジ継手接合構造。 - 請求項1のフランジ継手接合構造において、前記縦孔及び凹みは前記中心線に対して前記フランジ継手及び圧力配管の夫々に当角度間隔にかつ同周円上に配置されていることを特徴とするフランジ継手接合構造。
- 請求項1のフランジ継手接合構造において、前記縦孔及び凹みは前記フランジ継手及び圧力配管の夫々に当角度間隔にかつ差し込む側の面と他の部品と接続する側の面との間に前記中心線上の位置をずらして配置されていることを特徴とするフランジ継手接合構造。
- 請求項1のフランジ継手接合構造において、前記フランジ継手は前記中心線を中心とした螺旋状の螺子山が前記中央孔に設けられていることを特徴とするフランジ継手接合構造。
- 請求項4のフランジ継手接合構造において、前記フランジ継手は前記他の部品と接続する側の面の前記中央孔の入口は、前記中心線を中心とする平坦な曲面であることを特徴とするフランジ継手接合構造。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12867831.5A EP2813739B1 (en) | 2012-02-07 | 2012-10-10 | Flange joint connection structure |
US14/374,140 US9523450B2 (en) | 2012-02-07 | 2012-10-10 | Flange joint connection structure |
CN201280069206.9A CN104160197B (zh) | 2012-02-07 | 2012-10-10 | 法兰接头连接结构 |
JP2013557361A JP5924599B2 (ja) | 2012-02-07 | 2012-10-10 | フランジ継手接続構造 |
KR1020147021303A KR101631852B1 (ko) | 2012-02-07 | 2012-10-10 | 플랜지 조인트 접속 구조 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012-023582 | 2012-02-07 | ||
JP2012023582 | 2012-02-07 |
Publications (1)
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WO2013118346A1 true WO2013118346A1 (ja) | 2013-08-15 |
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PCT/JP2012/076155 WO2013118346A1 (ja) | 2012-02-07 | 2012-10-10 | フランジ継手接続構造 |
Country Status (6)
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US (1) | US9523450B2 (ja) |
EP (1) | EP2813739B1 (ja) |
JP (1) | JP5924599B2 (ja) |
KR (1) | KR101631852B1 (ja) |
CN (1) | CN104160197B (ja) |
WO (1) | WO2013118346A1 (ja) |
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US10316999B2 (en) | 2015-02-16 | 2019-06-11 | Nihonkansen Kogyo Kabushiki Kaisha | Pressure pipe connection method and method for constructing pressure pipe with flange |
WO2017042874A1 (ja) * | 2015-09-08 | 2017-03-16 | 日本管洗工業株式会社 | 圧力配管の接続方法及びフランジ付き圧力配管の作成方法 |
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CN109963746A (zh) * | 2016-11-25 | 2019-07-02 | 沃尔沃卡车集团 | 用于将摄像头安装在车辆上的装置和方法 |
US10604083B2 (en) | 2016-11-25 | 2020-03-31 | Volvo Truck Corporation | Device and method for mounting a camera on a vehicle |
KR101781608B1 (ko) * | 2017-06-14 | 2017-09-25 | 주식회사 우진아이엔에스 | 반도체설비용 배관의 연결장치 |
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WO2020217984A1 (ja) * | 2019-04-26 | 2020-10-29 | 株式会社デンソー | 電力変換装置 |
JP2020182363A (ja) * | 2019-04-26 | 2020-11-05 | 株式会社デンソー | 電力変換装置 |
JP7003967B2 (ja) | 2019-04-26 | 2022-01-21 | 株式会社デンソー | 電力変換装置 |
CN112377695A (zh) * | 2020-11-23 | 2021-02-19 | 馆陶县水利局 | 一种用于水利工程的水利管道 |
Also Published As
Publication number | Publication date |
---|---|
US9523450B2 (en) | 2016-12-20 |
US20140367964A1 (en) | 2014-12-18 |
JP5924599B2 (ja) | 2016-06-01 |
KR101631852B1 (ko) | 2016-06-20 |
KR20140119067A (ko) | 2014-10-08 |
EP2813739B1 (en) | 2017-01-04 |
CN104160197B (zh) | 2015-12-09 |
CN104160197A (zh) | 2014-11-19 |
EP2813739A1 (en) | 2014-12-17 |
JPWO2013118346A1 (ja) | 2015-05-11 |
EP2813739A4 (en) | 2015-11-11 |
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