WO2025141832A1

WO2025141832A1 - Piping device

Info

Publication number: WO2025141832A1
Application number: PCT/JP2023/047135
Authority: WO
Inventors: 哲弥西村; 敏広渡邊
Original assignee: Nippon Thermostat Co Ltd
Current assignee: Nippon Thermostat Co Ltd
Priority date: 2023-12-27
Filing date: 2023-12-27
Publication date: 2025-07-03
Anticipated expiration: 2026-06-27

Abstract

A piping device 10 according to the present invention comprises three or more flow passage forming parts 1-3, a bolt 9, a shaft seal 5 between the flow passage forming parts 1, 2, and a surface seal 6 between the flow passage forming parts 2, 3. The flow passage forming part 1 has an annular protrusion 7, and the flow passage forming part 2 has an annular recess 8. The flow passage forming parts 2 and 3 are respectively provided with opposing surfaces 15, 16 facing each other in a direction along the axial direction of the bolt 9. The flow passage forming parts 1 and 2 are provided with an insertion hole 11 through which the bolt 9 is inserted and positioned. The flow passage forming part 3 is positioned with respect to the flow passage forming part 1 by using the bolt 9.

Description

Piping Equipment

　本発明は、３つ以上の流路形成部がシールを介して接続された配管装置に関する。 The present invention relates to a piping device in which three or more flow path forming parts are connected via seals.

　従来、一続きの流路が形成される流路形成部同士をボルトで接続するとともに流路形成部同士の隙間から内部を流れる流体が漏れ出ないようにＯリングなどで密封した配管装置が知られている（例えば、特許文献１参照）。　Conventionally, piping devices are known in which flow path forming parts that form a continuous flow path are connected with bolts and sealed with O-rings or the like to prevent the fluid flowing inside from leaking out of the gaps between the flow path forming parts (see, for example, Patent Document 1).

特開２０１２－９２６７４号公報JP 2012-92674 A

　一続きの流路が形成される３つ以上の流路形成部をシールを介して直列にボルトで接続する場合、隣り合う流路形成部同士をボルトでそれぞれ接続するときに流路形成部同士の位置がずれてしまうと、流路形成部の間の流路に段差が生まれてしまう。このように隣接する流路形成部の間で位置ずれが生じると、１つずつの位置ずれは小さくても、３つ以上の流路形成部で構成される配管装置の両端に位置する流路形成部では位置ずれが極めて大きくなっている可能性があり、配管装置の流路抵抗が大きくなってしまうおそれがある。 When three or more flow path forming parts that form a continuous flow path are connected in series with bolts via seals, if the flow path forming parts are misaligned when connecting adjacent flow path forming parts with bolts, a step will be created in the flow path between the flow path forming parts. When misalignment occurs between adjacent flow path forming parts in this way, even if the misalignment of each part is small, the misalignment may be extremely large in the flow path forming parts located at both ends of a piping device composed of three or more flow path forming parts, and there is a risk of the flow path resistance of the piping device increasing.

　本発明は、以上の点に鑑み、組付け時の位置ずれの積み重ねによる流路抵抗の増加を抑えることができる３つ以上の流路形成部をシールを介して直列に接続する場合の配管装置を提供することを目的とする。 In view of the above, the present invention aims to provide a piping device in which three or more flow path forming parts are connected in series via seals, which can suppress an increase in flow path resistance caused by an accumulation of misalignments during assembly.

　上記目的を達成するため、本発明の第１の態様の配管装置は、
　一続きの流路が形成される３つ以上の流路形成部と、
　全ての前記流路形成部に渡って挿入され、全ての前記流路形成部を直列に接続するボルトと、
　隣り合う前記流路形成部の間の何れかに設けられて、前記流路からの液漏れを防ぐ軸シールと、
　隣り合う前記流路形成部の間の前記軸シールのない箇所に設けられて、流路からの液漏れを防ぐ面シールと、
　を備える配管装置であって、
　前記軸シールが配置される隣り合う前記流路形成部のうちの一方は、環状凸部を有し、
　前記軸シールが配置される隣り合う前記流路形成部のうちの他方は、前記環状凸部が挿入される環状凹部を有し、
　前記軸シールは、前記環状凹部に収容されて前記環状凸部の外周に押圧されており、
　前記面シールが配置される隣り合う前記流路形成部は、前記ボルトの軸線方向に沿う方向に向かい合う対向面をそれぞれ備えており、
　前記面シールは、前記対向面の間に押圧されており、
　前記軸シールが配置される隣り合う前記流路形成部のうちの一方は、前記ボルトを挿通させて位置決めする挿通孔を備え、
　前記面シールが配置される隣り合う前記流路形成部のうちの少なくとも一方は、前記ボルトによって前記挿通孔を備える前記流路形成部と位置決めされている。 In order to achieve the above object, a piping device according to a first aspect of the present invention comprises:
Three or more flow path forming parts in which a continuous flow path is formed;
a bolt that is inserted across all of the flow passage forming portions and connects all of the flow passage forming portions in series;
an axial seal provided between adjacent ones of the flow path forming portions to prevent liquid leakage from the flow path;
a surface seal provided at a location where there is no axial seal between adjacent flow path forming portions to prevent liquid leakage from the flow path;
A piping device comprising:
One of the adjacent flow path forming portions in which the shaft seal is disposed has an annular protrusion,
the other of the adjacent flow path forming portions in which the shaft seal is disposed has an annular recess into which the annular protrusion is inserted,
The shaft seal is received in the annular recess and pressed against an outer periphery of the annular protrusion,
The adjacent flow passage forming portions in which the face seals are arranged each have opposing surfaces that face each other in a direction along the axial direction of the bolt,
the face seal is compressed between the opposing faces;
one of the adjacent flow passage forming portions in which the shaft seal is arranged includes an insertion hole through which the bolt is inserted and positioned;
At least one of the adjacent flow passage forming portions in which the face seal is arranged is positioned with respect to the flow passage forming portion having the insertion hole by the bolt.

　本発明によれば、軸シールが配置される隣り合う流路形成部は、環状凸部と環状凹部と軸シールとで中心を合わせることができる。従って、軸シールが配置される隣り合う流路形成部に形成されるボルトを挿通させる挿通孔のボルトとの隙間は、挿通孔の位置ずれを抑制することができるため、小さくすることができる。これにより、ボルトが位置決めピンとしての機能を備えることとなり、面シールが配置される隣り合う流路形成部も中心を合わせることができる。ゆえに、本発明によれば、３つ以上の流路形成部の位置ずれを従来よりも抑えることができ、流路抵抗を抑えることができる。 According to the present invention, adjacent flow passage forming parts in which shaft seals are arranged can be centered with the annular convex part, the annular concave part, and the shaft seal. Therefore, the gap between the bolt and the insertion hole formed in the adjacent flow passage forming parts in which the shaft seal is arranged can be made small because misalignment of the insertion hole can be suppressed. This allows the bolt to function as a positioning pin, and the centers of adjacent flow passage forming parts in which face seals are arranged can also be aligned. Therefore, according to the present invention, misalignment of three or more flow passage forming parts can be suppressed more than before, and flow passage resistance can be suppressed.

　また、本発明の第１の態様の配管装置においては、前記ボルトは、段部を有し、前記段部は、前記対向面に接触していてもよい。 In addition, in the piping device of the first aspect of the present invention, the bolt may have a step, and the step may be in contact with the opposing surface.

　かかる構成によれば、ボルトに加わる力を段部を介して対向面で受けることができ、配管装置全体としての耐久性の向上を図ることができる。 With this configuration, the force applied to the bolt can be received by the opposing surface via the step, improving the durability of the piping device as a whole.

　また、本発明の第２の態様の配管装置は、
　一続きの流路が形成される３つ以上の流路形成部と、
　全ての前記流路形成部に渡って挿入され、全ての前記流路形成部を直列に接続するボルトと、
　隣り合う前記流路形成部の間の何れかに設けられて、前記流路からの液漏れを防ぐ軸シールと、
　隣り合う前記流路形成部の間の前記軸シールのない箇所に設けられて、前記流路からの液漏れを防ぐ面シールと、
　を備える配管装置であって、
　前記軸シールが配置される隣り合う前記流路形成部のうちの一方は、環状凸部を有し、
　前記軸シールが配置される隣り合う前記流路形成部のうちの他方は、前記環状凸部が挿入される環状凹部を有し、
　前記軸シールは、前記環状凹部に収容されて前記環状凸部の外周に押圧されており、
　前記面シールが配置される隣り合う前記流路形成部は、前記ボルトの軸線方向に沿う方向に向かい合う対向面をそれぞれ備えており、
　前記面シールは、前記対向面の間に押圧されており、
　前記ボルトは、先端に雄ネジ部を有し、
　前記流路形成部のうちの１つは、前記雄ネジ部が螺合する雌ネジ部を有するナットを備え、
　前記ナットは、一方の前記対向面から突出するように前記流路形成部に設けられ、
　他方の前記対向面を有する前記流路形成部は、前記ナットを受け入れる受入部を有し、
　前記ナットを有する前記流路形成部と前記受入部を有する前記流路形成部とは、前記ナットと前記受入部とが嵌合することにより位置決めされている。 Moreover, the piping device according to the second aspect of the present invention is
Three or more flow path forming parts in which a continuous flow path is formed;
a bolt that is inserted across all of the flow passage forming portions and connects all of the flow passage forming portions in series;
an axial seal provided between adjacent ones of the flow path forming portions to prevent liquid leakage from the flow path;
a surface seal provided at a location where there is no axial seal between adjacent flow path forming portions to prevent liquid leakage from the flow path;
A piping device comprising:
One of the adjacent flow path forming portions in which the shaft seal is disposed has an annular protrusion,
the other of the adjacent flow path forming portions in which the shaft seal is disposed has an annular recess into which the annular protrusion is inserted,
The shaft seal is received in the annular recess and pressed against an outer periphery of the annular protrusion,
The adjacent flow passage forming portions in which the face seals are arranged each have opposing surfaces that face each other in a direction along the axial direction of the bolt,
the face seal is compressed between the opposing faces;
The bolt has a male thread at a tip thereof,
one of the flow path forming parts includes a nut having a female thread portion into which the male thread portion is screwed;
The nut is provided on the flow path forming portion so as to protrude from one of the opposing surfaces,
the flow passage forming portion having the other opposing surface has a receiving portion that receives the nut,
The flow passage forming portion having the nut and the flow passage forming portion having the receiving portion are positioned by fitting the nut and the receiving portion together.

　本発明によれば、軸シールが配置される隣り合う流路形成部は、環状凸部と環状凹部と軸シールとで中心を合わせることができる。また、面シールが配置される隣り合う流路形成部は、ナットと受入部とで中心を合わせることができる。ゆえに、本発明によれば、３つ以上の流路形成部の位置ずれを従来よりも抑えることができ、流路抵抗を抑えることができる。 According to the present invention, adjacent flow passage forming parts in which shaft seals are arranged can be centered with the annular convex part, the annular concave part, and the shaft seal. Also, adjacent flow passage forming parts in which face seals are arranged can be centered with the nut and the receiving part. Therefore, according to the present invention, it is possible to reduce the positional deviation of three or more flow passage forming parts more than in the past, and it is possible to reduce flow passage resistance.

　また、本発明の第２の態様の配管装置においては、前記ボルトは、前記雄ネジ部よりも基端側に位置する段部を有し、前記段部は、前記ナットに接触していてもよい。 In addition, in the piping device of the second aspect of the present invention, the bolt may have a step located closer to the base end than the male thread portion, and the step may be in contact with the nut.

　かかる構成によれば、ボルトに加わる力をナットで受けることができ、配管装置全体としての耐久性の向上を図ることができる。 With this configuration, the force applied to the bolt can be received by the nut, improving the durability of the entire piping device.

本発明の一実施形態の配管装置を示す平面図。FIG. 2 is a plan view showing the piping device according to the embodiment of the present invention. 本実施形態の配管装置を示す図１のＡ、Ｂ、Ｃ、Ｄ線の組合せ断面図。2 is a combined cross-sectional view of lines A, B, C, and D in FIG. 1 showing the piping device of the present embodiment. 本実施形態の配管装置を示す図１のＥ、Ｆ線の断面図。2 is a cross-sectional view taken along line E-F in FIG. 1 , showing the piping device of the present embodiment. 本実施形態の配管装置を示す斜視図。FIG. 1 is a perspective view showing a piping device according to an embodiment of the present invention.

　図面を参照して、本発明の一実施形態の配管装置を説明する。図１を参照して、本実施形態の配管装置１０は、合成樹脂製の第１流路形成部１と、合成樹脂製の第２流路形成部２と、合成樹脂製の第３流路形成部３と、金属製のボルト９とを備え、第１から第３の各流路形成部１～３は、ボルト９で直列に接続されて一続きの流路が形成されている。 The piping device of one embodiment of the present invention will be described with reference to the drawings. With reference to FIG. 1, the piping device 10 of this embodiment comprises a first flow path forming portion 1 made of synthetic resin, a second flow path forming portion 2 made of synthetic resin, a third flow path forming portion 3 made of synthetic resin, and a metal bolt 9, and the first to third flow path forming portions 1 to 3 are connected in series by the bolt 9 to form a continuous flow path.

　配管装置１０は、第１流路形成部１と第２流路形成部２との間に配置されたゴムなどの弾性体からなる軸シール５と、第２流路形成部２と第３流路形成部３との間に配置されたゴムなどの弾性体からなる面シール６とを備える。第２流路形成部２は、その内部に開閉弁（図示省略）を収容したハウジングである。なお、本発明の流路形成部は、開閉弁を収容したハウジングに限られず、他のものにも同様に適用することができる。 The piping device 10 includes an axial seal 5 made of an elastic material such as rubber and arranged between the first flow path forming section 1 and the second flow path forming section 2, and a face seal 6 made of an elastic material such as rubber and arranged between the second flow path forming section 2 and the third flow path forming section 3. The second flow path forming section 2 is a housing that houses an on-off valve (not shown) therein. Note that the flow path forming section of the present invention is not limited to a housing that houses an on-off valve, and can be similarly applied to other things.

　第１流路形成部１には、第２流路形成部２に向かって延びる環状凸部７が設けられている。第２流路形成部２には、環状凸部７に外嵌される環状凹部８が設けられている。環状凸部７の外周面と環状凹部８の内周面との間に軸シール５が配置されている。 The first flow path forming section 1 is provided with an annular protrusion 7 that extends toward the second flow path forming section 2. The second flow path forming section 2 is provided with an annular recess 8 that is fitted onto the annular protrusion 7. A shaft seal 5 is disposed between the outer peripheral surface of the annular protrusion 7 and the inner peripheral surface of the annular recess 8.

　第１流路形成部１は、ボルト９を挿通させる複数の第１挿通孔１１を有している。第２流路形成部２は、第１挿通孔１１に挿通されたボルト９を挿通させる複数の第２挿通孔１２を有している。第３流路形成部３は、第１挿通孔１１と第２挿通孔１２に挿通されたボルト９と螺合する雌ネジ部１３ａを有する。 The first flow path forming section 1 has a plurality of first insertion holes 11 through which the bolts 9 are inserted. The second flow path forming section 2 has a plurality of second insertion holes 12 through which the bolts 9 inserted into the first insertion holes 11 are inserted. The third flow path forming section 3 has a female threaded section 13a that screws into the bolts 9 inserted into the first insertion holes 11 and the second insertion holes 12.

　第２流路形成部２は、第３流路形成部３と接続される接続方向１４に対して垂直な平面である第１対向面１５を有する。第３流路形成部３は、第１対向面１５と向かい合う平面からなる第２対向面１６を有する。この第１対向面１５と第２対向面１６との間に面シール６が挟まれ、第２流路形成部２と第３流路形成部３との間を密封する。 The second flow path forming section 2 has a first opposing surface 15, which is a plane perpendicular to the connection direction 14 where it is connected to the third flow path forming section 3. The third flow path forming section 3 has a second opposing surface 16, which is a plane facing the first opposing surface 15. A surface seal 6 is sandwiched between the first opposing surface 15 and the second opposing surface 16, sealing the gap between the second flow path forming section 2 and the third flow path forming section 3.

　ボルト９は、段部９ａを備えるいわゆる段付きボルトであり、段部９ａよりも小径に形成された先端側の外周面に雄ネジ部９ｂを有している。第３流路形成部３は、雌ネジ部１３ａを有する金属製のナット１３を金型内にセットしてから合成樹脂と一体に成形（インサート成形）されたものである。ナット１３は第２対向面１６で一部突出して突出部１３ｂを構成している。このナット１３の突出部１３ｂの先端面にボルト９の段部９ａが接触している。これにより、ボルト９に加わる力を段部９ａを介して第２平面１６の一部としての金属製のナット１３で受けることができ、配管装置１０の耐久性を高めることができる。なお、ナット１３は必ずしも金属製でなくてもよい。 The bolt 9 is a so-called stepped bolt with a step 9a, and has a male thread 9b on the outer circumferential surface at the tip side, which is formed with a smaller diameter than the step 9a. The third flow path forming part 3 is formed by setting a metal nut 13 with a female thread 13a in a mold and then molding it integrally with synthetic resin (insert molding). The nut 13 protrudes partially from the second opposing surface 16 to form a protruding part 13b. The step 9a of the bolt 9 contacts the tip surface of the protruding part 13b of the nut 13. This allows the force applied to the bolt 9 to be received by the metal nut 13 as part of the second plane 16 via the step 9a, thereby improving the durability of the piping device 10. Note that the nut 13 does not necessarily have to be made of metal.

　ここで、一般的に、３つの流路形成部をボルトで繋ぎ合わせる場合、ボルトを挿通させる挿通孔は各流路形成部の挿通孔位置の出来栄えを考慮して多少大きな余裕を持たせるべく、ボルトの外径に対して、比較的大きな隙間が設けられるように挿通孔を大径に形成する必要がある。 Generally, when connecting three flow path forming parts with bolts, the insertion holes through which the bolts pass must be formed with a large diameter so that a relatively large gap is provided compared to the outer diameter of the bolts, in order to allow for some leeway in consideration of the finish of the insertion hole positions of each flow path forming part.

　しかしながら、本実施形態の配管装置１０によれば、第１流路形成部１と第２流路形成部２とは、環状凸部７と環状凹部８と軸シール５とで中心を合わせることができる。従って、第１挿通孔１１と第２挿通孔１２の位置ずれを抑制することができるため、第１挿通孔１１または第２挿通口１２のいずれか一方は径を大きくして位置の寸法公差を大きくすることができ、配管装置１０の生産性を向上させることができる。また、第１挿通孔１１または第２挿通口１２のいずれか他方（径を大きくしなかった方）を用いてボルト９を位置決めピンとして機能させることができる。これにより、ボルト９が螺着される雌ネジ部１３ａを備える第３流路形成部３も第１流路形成部１及び第２流路形成部２と中心を合わせることができる。ゆえに、本実施形態の配管装置１０によれば、生産性を向上させつつ、３つの第１から第３流路形成部１～３の位置ずれを従来よりも抑えることができ、配管装置１０の内部を流れる流体の流路抵抗を抑えることができる。 However, according to the piping device 10 of this embodiment, the first flow path forming portion 1 and the second flow path forming portion 2 can be centered by the annular convex portion 7, the annular concave portion 8, and the shaft seal 5. Therefore, since the positional deviation of the first insertion hole 11 and the second insertion hole 12 can be suppressed, the diameter of either the first insertion hole 11 or the second insertion hole 12 can be increased to increase the positional dimensional tolerance, and the productivity of the piping device 10 can be improved. In addition, the bolt 9 can be made to function as a positioning pin by using the other of the first insertion hole 11 or the second insertion hole 12 (the one whose diameter is not increased). As a result, the third flow path forming portion 3 having the female thread portion 13a to which the bolt 9 is screwed can also be centered with the first flow path forming portion 1 and the second flow path forming portion 2. Therefore, according to the piping device 10 of this embodiment, the positional deviation of the three first to third flow path forming portions 1 to 3 can be suppressed more than before while improving productivity, and the flow path resistance of the fluid flowing inside the piping device 10 can be suppressed.

　また、本実施形態の配管装置１０によれば、互いに向かい合う第１対向面１５と第２対向面１６との間に面シール６を配置しているため、流路の開口面積を大きくすることができ、配管装置１０の圧力損失を低く抑えつつ、配管装置１０全体としての部品サイズの小型化を図ることができる。また、面シール６は様々な形状をとることができ、面シール６の設計自由度の向上を図ることができる。また、面シール６が第１対向面１５と第２対向面１６とを引き離す方向へ付勢力を発生させるため、ボルト９と雌ネジ部１３ａにも両者を引き離す方向への力を加えることとなり、ボルト９と雌ネジ部１３ａとの螺合が緩むことを抑制することができる。 In addition, according to the piping device 10 of this embodiment, since the face seal 6 is disposed between the first opposing surface 15 and the second opposing surface 16 that face each other, the opening area of the flow path can be increased, and the component size of the piping device 10 as a whole can be reduced while keeping the pressure loss of the piping device 10 low. Furthermore, the face seal 6 can take various shapes, improving the design freedom of the face seal 6. Furthermore, since the face seal 6 generates a biasing force in a direction that separates the first opposing surface 15 and the second opposing surface 16, a force is also applied to the bolt 9 and the female threaded portion 13a in a direction that separates them, and loosening of the screwing between the bolt 9 and the female threaded portion 13a can be suppressed.

　第２流路形成部２は、第１対向面１５側に位置させて設けられた受入部１７を有する。受入部１７は、ナット１３の突出部１３ｂを受け入れて突出部１３ｂと嵌合することによって、位置決めとして機能する。本実施形態においては、環状凸部７と、環状凹部８とで、第１流路形成部１と第２流路形成部２の位置決めを行い、突出部１３ｂと受入部１７とで、第２流路形成部２と第３流路形成部３の位置決めを行う。このため、ボルト９による位置決めは必ずしも必要ではなく、ボルト９は、一番最後に第１から第３の３つの流路形成部１～３に組み付けることもできる。 The second flow path forming section 2 has a receiving section 17 located on the first opposing surface 15 side. The receiving section 17 functions as a positioning section by receiving the protruding section 13b of the nut 13 and engaging with the protruding section 13b. In this embodiment, the first flow path forming section 1 and the second flow path forming section 2 are positioned by the annular convex section 7 and the annular concave section 8, and the second flow path forming section 2 and the third flow path forming section 3 are positioned by the protruding section 13b and the receiving section 17. For this reason, positioning using the bolt 9 is not necessarily required, and the bolt 9 can also be attached to the first to third three flow path forming sections 1 to 3 at the very end.

　なお、本実施形態では、ボルト９で第１流路形成部１と第３流路形成部との位置決めを行っているため、突出部１３ｂと受入部１７は省略することもできる。この場合、ボルト９は、第３流路形成部３に設けられた雌ネジ部に螺合され位置決めされる。また、ボルト９と第３流路形成部３との位置決めは、螺合には限られない。例えば、第３流路形成部３がボルト９を挿通させる挿通孔を備え、ボルト９と第３流路形成部３との位置決めは第３流路形成部の挿通孔で行ってもよい。この場合、第３流路形成部の貫通孔を通過して第３流路形成部から突出したボルト９の先端にナットを羅着させて第１から第３流路形成部１～３を固定させる。 In this embodiment, since the bolt 9 is used to position the first flow path forming section 1 and the third flow path forming section, the protrusion 13b and the receiving section 17 can be omitted. In this case, the bolt 9 is screwed into a female thread provided in the third flow path forming section 3 to be positioned. Furthermore, the positioning of the bolt 9 and the third flow path forming section 3 is not limited to screwing. For example, the third flow path forming section 3 may have an insertion hole through which the bolt 9 is inserted, and the bolt 9 and the third flow path forming section 3 may be positioned through the insertion hole of the third flow path forming section. In this case, the first to third flow path forming sections 1 to 3 are fixed by screwing a nut onto the tip of the bolt 9 that passes through the through hole of the third flow path forming section and protrudes from the third flow path forming section.

　また、本実施形態においては、第１流路形成部１に環状凸部７が設けられ、第２流路形成部２に環状凹部８が設けられた配管装置１０を用いて説明したが、本発明の配管装置はこれに限らず、第１流路形成部と第２流路形成部とが中心を合わせることができるように軸シールされていればよい。したがって、例えば、第１流路形成部に環状凹部を設け、第２流路形成部に環状凸部を設け、環状凹部と環状凸部の間に軸シールを配置してもよい。また、金属製のナット１３に代えて、第３流路形成部３を雌ネジ部１３を有する金属製または合成樹脂製の部品で構成してもよい。この場合、ボルト９に加わる力は金属製または合成樹脂製の第３流路形成部３の第２対向面１６で直接受けることとなる。 In addition, in this embodiment, the piping device 10 is described in which the first flow passage forming section 1 is provided with an annular convex portion 7 and the second flow passage forming section 2 is provided with an annular concave portion 8, but the piping device of the present invention is not limited to this, and it is sufficient that the shaft seal is provided so that the first flow passage forming section and the second flow passage forming section can be centered. Therefore, for example, an annular concave portion may be provided in the first flow passage forming section, an annular convex portion may be provided in the second flow passage forming section, and a shaft seal may be placed between the annular concave portion and the annular convex portion. Also, instead of the metal nut 13, the third flow passage forming section 3 may be configured with a metal or synthetic resin part having a female thread portion 13. In this case, the force applied to the bolt 9 is directly received by the second opposing surface 16 of the metal or synthetic resin third flow passage forming section 3.

　また、ナット１３はインサート成形に限らず、例えば、ナットを第３流路形成部と同一の合成樹脂材料で構成して、ナットと第３流路形成部との区別のない一体部品で構成してもよい。この場合、突出部は第３流路形成部の対向面に設ければよい。また、流路形成部は３つ以上であればよく、例えば、４つや５つであってもよい。この場合、軸シールと、面シールの位置は適宜変更してもよく、これによっても、流路形成部の位置ずれを従来よりも抑制して流路抵抗を抑えることができるという本発明の作用効果を得ることができる。４つ以上の流路形成部で配管装置を構成し、かつ何れかの流路形成部が軸シールと環状凹部と環状凸部で位置決めされておらず、さらには突出部と受入部とでも位置決めされていない場合には、位置決めピンとしてのボルトを挿通する挿通孔で位置決めすればよい。 The nut 13 is not limited to being insert molded, and may be made of the same synthetic resin material as the third flow passage forming portion, and may be made into an integrated part with no distinction between the nut and the third flow passage forming portion. In this case, the protruding portion may be provided on the opposing surface of the third flow passage forming portion. Also, the number of flow passage forming portions may be three or more, for example, four or five. In this case, the positions of the shaft seal and the face seal may be changed as appropriate, and this also provides the effect of the present invention of suppressing the positional deviation of the flow passage forming portion and suppressing the flow passage resistance more than in the past. When a piping device is made up of four or more flow passage forming portions, and any of the flow passage forming portions is not positioned by the shaft seal, the annular recess, and the annular protrusion, and further not positioned by the protruding portion and the receiving portion, it is sufficient to position it with an insertion hole through which a bolt serving as a positioning pin is inserted.

　配管装置１０は、
　一続きの流路が形成される３つ以上の流路形成部１～３と、
　全ての前記流路形成部１～３に渡って挿入され、全ての前記流路形成部１～３を直列に接続するボルト９と、
　隣り合う前記流路形成部１～３の間の何れかに設けられて、前記流路からの液漏れを防ぐ軸シール５と、
　隣り合う前記流路形成部１～３の間の前記軸シール５のない箇所に設けられて、前記流路からの液漏れを防ぐ面シール６と、
　を備える配管装置１０であって、
　前記軸シール５が配置される隣り合う前記流路形成部１～３のうちの一方は、環状凸部７を有し、
　前記軸シール５が配置される隣り合う前記流路形成部１～３のうちの他方は、前記環状凸部７が挿入される環状凹部８を有し、
　前記軸シール５は、前記環状凹部８に収容されて前記環状凸部７の外周に押圧されており、
　前記面シール６が配置される隣り合う前記流路形成部１～３は、前記ボルト９の軸線方向に沿う方向に向かい合う対向面１５，１６をそれぞれ備えており、
　前記面シール６は、前記対向面１５，１６の間に押圧されており、
　前記軸シール５が配置される隣り合う前記流路形成部１～２のうちの一方は、前記ボルト９を挿通させて位置決めする挿通孔を備え、
　前記面シールが配置される隣り合う前記流路形成部のうちの少なくとも一方の流路形成部３は、前記ボルト９によって前記挿通孔１１を備える前記流路形成部１と位置決めされている。 The piping device 10 includes:
Three or more flow path forming parts 1 to 3 in which a continuous flow path is formed;
a bolt 9 that is inserted across all of the flow path forming portions 1 to 3 and connects all of the flow path forming portions 1 to 3 in series;
an axial seal 5 provided between any of the adjacent flow path forming portions 1 to 3 to prevent liquid leakage from the flow path;
a surface seal 6 provided at a location where the shaft seal 5 is not present between adjacent flow path forming portions 1 to 3 to prevent liquid leakage from the flow path;
A piping device 10 comprising:
One of the adjacent flow path forming portions 1 to 3 in which the shaft seal 5 is arranged has an annular protrusion 7,
the other of the adjacent flow passage forming portions 1 to 3 in which the shaft seal 5 is arranged has an annular recess 8 into which the annular protrusion 7 is inserted,
The shaft seal 5 is accommodated in the annular recess 8 and pressed against the outer periphery of the annular protrusion 7,
The adjacent flow passage forming portions 1 to 3 in which the face seals 6 are arranged each have opposing surfaces 15, 16 that face each other in a direction along the axial direction of the bolt 9,
The face seal 6 is pressed between the opposing surfaces 15 and 16,
One of the adjacent flow passage forming portions 1 and 2 in which the shaft seal 5 is arranged has an insertion hole for inserting the bolt 9 into the insertion hole to position the bolt 9,
At least one of the adjacent flow passage forming portions 3 in which the face seal is arranged is positioned with respect to the flow passage forming portion 1 having the insertion hole 11 by the bolt 9 .

　配管装置１０によれば、軸シール５が配置される隣り合う流路形成部１～２は、環状凸部７と環状凹部８と軸シール５とで中心を合わせることができる。従って、軸シール５が配置される隣り合う流路形成部１～３に形成されるボルト９を挿通させる挿通孔１１のボルト９との隙間は、挿通孔１１の位置ずれを抑制することができるため、第１挿通孔１１または第２挿通口１２のいずれか一方は径を大きくして大きな位置バラツキを許容させることができ、配管装置１０の生産性を向上させることができる。また、第１挿通孔１１または第２挿通口１２のいずれか他方の径を大きくしなかった方を用いてボルト９を位置決めピンとして機能させることができる。これにより、面シール６が配置される隣り合う流路形成部１～３も中心を合わせることができる。ゆえに、配管装置１０によれば、生産性を向上させつつ、３つ以上の流路形成部１～３の位置ずれを従来よりも抑えることができ、流路抵抗を抑えることができる。 The piping device 10 allows the adjacent flow passage forming parts 1-2 in which the shaft seal 5 is arranged to be centered by the annular convex part 7, the annular concave part 8, and the shaft seal 5. Therefore, the clearance between the bolt 9 and the insertion hole 11 through which the bolt 9 is inserted, which is formed in the adjacent flow passage forming parts 1-3 in which the shaft seal 5 is arranged, can suppress misalignment of the insertion hole 11, so that the diameter of either the first insertion hole 11 or the second insertion port 12 can be increased to allow large positional variations, and the productivity of the piping device 10 can be improved. In addition, the bolt 9 can be made to function as a positioning pin by using the other of the first insertion hole 11 or the second insertion port 12, which does not have a large diameter. This allows the adjacent flow passage forming parts 1-3 in which the face seal 6 is arranged to be centered. Therefore, the piping device 10 allows the misalignment of three or more flow passage forming parts 1-3 to be suppressed more than before while improving productivity, and suppresses flow passage resistance.

　配管装置において、軸シール５が配置される隣り合う流路形成部のうちの一方で、ボルト９を挿通させて位置決めする挿通孔を備える流路形成部を基準流路形成部とする。面シール６が配置される隣り合う流路形成部のうち、［１］ボルト９の雄ネジ部９ｂが螺合する雌ネジ部が形成された流路形成部、［２］ボルト９の雄ネジ部９ｂが螺合するナット１３がインサート成形等により一体化された流路形成部は、基準流路形成部とボルト９の螺合によって位置決めされる。このため、［１］［２］の流路形成部と、基準流路形成部との位置ずれを抑制し、流路抵抗を抑えることができる。 In the piping device, one of the adjacent flow passage forming parts in which the shaft seals 5 are arranged is a flow passage forming part that has an insertion hole through which the bolt 9 is inserted for positioning, and this is set as the reference flow passage forming part. Of the adjacent flow passage forming parts in which the face seals 6 are arranged, [1] the flow passage forming part in which a female threaded part into which the male threaded part 9b of the bolt 9 is screwed is formed, and [2] the flow passage forming part in which the nut 13 into which the male threaded part 9b of the bolt 9 is screwed is integrated by insert molding or the like, and these are positioned by screwing the bolt 9 into the reference flow passage forming part. This makes it possible to suppress misalignment between the flow passage forming parts [1] and [2] and the reference flow passage forming part, and to suppress flow passage resistance.

　また、３つ以上の流路形成部と、軸シール５及び面シール６を備え、ボルト９を位置決めピンとして機能させる配管装置１０において、面シール６が配置される隣り合う流路形成部のうち、［３］ナットを受け入れる受入部１７を有する流路形成部は、基準流路形成部とボルト９によって位置決めしなくても、受入部１７によって位置決めが可能となる。このため、［３］の流路形成部のボルト９が挿通される挿通孔の径を大きくして大きな位置バラツキを許容できる。よって、生産性を向上しつつ、流路抵抗を抑えることができる。 Furthermore, in a piping device 10 having three or more flow passage forming parts, an axial seal 5, and a face seal 6, and in which a bolt 9 functions as a positioning pin, among the adjacent flow passage forming parts in which a face seal 6 is arranged, the flow passage forming part having a receiving part 17 for receiving a nut [3] can be positioned by the receiving part 17 without being positioned by the reference flow passage forming part and the bolt 9. Therefore, the diameter of the insertion hole through which the bolt 9 of the flow passage forming part [3] is inserted can be increased to allow for large positional variations. This makes it possible to suppress flow passage resistance while improving productivity.

　また、配管装置１０においては、前記ボルト９は、段部９ａを有し、前記段部９ａは、前記対向面１６に接触している。 In addition, in the piping device 10, the bolt 9 has a step portion 9a, and the step portion 9a is in contact with the opposing surface 16.

　かかる構成によれば、ボルト９に加わる力を段部９ａを介して対向面１６で受けることができ、配管装置１０全体としての耐久性の向上を図ることができる。 With this configuration, the force applied to the bolt 9 can be received by the opposing surface 16 via the step 9a, improving the durability of the piping device 10 as a whole.

　また、本実施形態では、ボルト９によって第１流路形成部１と第３流路形成部３とを位置決めしているが、本実施形態の配管装置１０はこれに限らず、さらにナット１３を用いて第２流路形成部２と第３流路形成部３とを位置決めしている。 In addition, in this embodiment, the first flow path forming section 1 and the third flow path forming section 3 are positioned by the bolt 9, but the piping device 10 of this embodiment is not limited to this, and further positions the second flow path forming section 2 and the third flow path forming section 3 using a nut 13.

　また、実施形態の配管装置１０は、
　一続きの流路が形成される３つ以上の流路形成部１～３と、
　全ての前記流路形成部１～３を直列に接続するボルト９と、
　隣り合う前記流路形成部１、２の間の何れかに設けられて、前記流路からの液漏れを防ぐ軸シール５と、
　隣り合う前記流路形成部２，３の間の前記軸シール５のない箇所に設けられて、前記流路からの液漏れを防ぐ面シール６と、
　を備える配管装置１０であって、
　前記軸シール５が配置される隣り合う前記流路形成部１、２のうちの一方の第１流路形成部１は、環状凸部７を有し、
　前記軸シール５が配置される隣り合う前記流路形成部１、２のうちの他方の第２流路形成部２は、前記環状凸部７が挿入される環状凹部８を有し、
　前記軸シール５は、前記環状凹部８に収容されて前記環状凸部７の外周に押圧されており、
　前記面シール６が配置される隣り合う前記流路形成部２，３は、前記ボルト９の軸線方向に沿う方向に向かい合う対向面１５，１６をそれぞれ備えており、
　前記面シール６は、前記対向面１５，１６の間に押圧されており、
　前記ボルト９は、先端に雄ネジ部９ｂを有し、
　前記流路形成部のうちの１つ（第３流路形成部３）は、前記雄ネジ部９ｂが螺合する雌ネジ部１３ａを有するナット１３を備え、
　前記ナット１３は、一方の前記対向面１６から突出するように前記第３流路形成部３に設けられ、
　他方の前記対向面１５を有する前記第２流路形成部２は、前記ナット１３を受け入れる受入部１７を有し、
　前記ナット１３を有する前記第３流路形成部３と前記受入部１７を有する前記第２３流路形成部２とは、前記ナット１３と前記受入部１７とが嵌合することにより位置決めされている。 In addition, the piping device 10 of the embodiment is
Three or more flow path forming parts 1 to 3 in which a continuous flow path is formed;
A bolt 9 connecting all of the flow passage forming portions 1 to 3 in series;
an axial seal 5 provided between adjacent flow path forming portions 1 and 2 to prevent liquid leakage from the flow path;
a surface seal 6 provided at a location where the shaft seal 5 is not present between the adjacent flow path forming portions 2, 3 to prevent liquid leakage from the flow path;
A piping device 10 comprising:
The first flow path forming portion 1, which is one of the adjacent flow path forming portions 1 and 2 in which the shaft seal 5 is arranged, has an annular convex portion 7,
The other second flow path forming portion 2 of the adjacent flow path forming portions 1, 2 in which the shaft seal 5 is arranged has an annular recessed portion 8 into which the annular protruding portion 7 is inserted,
The shaft seal 5 is accommodated in the annular recess 8 and pressed against the outer periphery of the annular protrusion 7,
The adjacent flow passage forming portions 2, 3 in which the face seals 6 are arranged each have opposing surfaces 15, 16 that face each other in a direction along the axial direction of the bolt 9,
The face seal 6 is pressed between the opposing surfaces 15 and 16,
The bolt 9 has a male thread portion 9b at its tip,
One of the flow path forming parts (third flow path forming part 3) includes a nut 13 having a female threaded part 13a into which the male threaded part 9b is screwed,
The nut 13 is provided on the third flow path forming portion 3 so as to protrude from one of the opposing surfaces 16,
The second flow path forming portion 2 having the other opposing surface 15 has a receiving portion 17 that receives the nut 13,
The third flow passage forming portion 3 having the nut 13 and the 23rd flow passage forming portion 2 having the receiving portion 17 are positioned by fitting the nut 13 and the receiving portion 17 together.

　前記構成によれば、軸シール５が配置される隣り合う流路形成部１～３は、環状凸部７と環状凹部８と軸シール５とで中心を合わせることができる。また、面シール６が配置される隣り合う流路形成部１～３は、ナット１３と受入部１７とで中心を合わせることができる。ゆえに、本実施形態の配管装置１０によれば、３つ以上の流路形成部１～３の位置ずれを従来よりも抑えることができ、流路抵抗を抑えることができる。また、ボルト９は、一番最後に第１から第３の３つの流路形成部１～３に組み付けることもできる。 With the above configuration, the adjacent flow passage forming parts 1-3 in which the shaft seal 5 is arranged can be centered with the annular convex part 7, the annular concave part 8, and the shaft seal 5. Furthermore, the adjacent flow passage forming parts 1-3 in which the face seal 6 is arranged can be centered with the nut 13 and the receiving part 17. Therefore, with the piping device 10 of this embodiment, it is possible to reduce the positional deviation of three or more flow passage forming parts 1-3 more than in the past, and to reduce flow passage resistance. Furthermore, the bolt 9 can also be assembled to the first to third three flow passage forming parts 1-3 last.

　また、本実施形態では、配管装置１０が流路形成部を３つ備える場合であって、第１流路形成部１と第２流路形成部２との間に軸シール５が配置され、第２流路形成部２と第３流路形成部３との間に面シール６が配置され、第３流路形成部３がナット１３を備え、第２流路形成部２に受入部１７が形成される。 In addition, in this embodiment, the piping device 10 has three flow path forming sections, an axial seal 5 is arranged between the first flow path forming section 1 and the second flow path forming section 2, a face seal 6 is arranged between the second flow path forming section 2 and the third flow path forming section 3, the third flow path forming section 3 has a nut 13, and a receiving section 17 is formed in the second flow path forming section 2.

　前記構成によれば、第１流路形成部１と第２流路形成部２とが、環状凸部７と環状凹部８と軸シール５により調心され、第２流路形成部２と第３流路形成部３とが、ナット１３と受入部１７により位置決めされる。このため、ボルト９を位置決めピンとして利用しなくても、流路形成部１～３の位置ずれを抑制し、流路抵抗を抑えることができる。なお、流路形成部の数は、３以上であればよく、４以上とする場合にボルト９を位置決めピンとして利用してもよい。 With the above configuration, the first flow path forming portion 1 and the second flow path forming portion 2 are aligned by the annular convex portion 7, the annular concave portion 8, and the shaft seal 5, and the second flow path forming portion 2 and the third flow path forming portion 3 are positioned by the nut 13 and the receiving portion 17. Therefore, even without using the bolt 9 as a positioning pin, it is possible to suppress misalignment of the flow path forming portions 1 to 3 and reduce flow path resistance. Note that the number of flow path forming portions may be three or more, and if there are four or more, the bolt 9 may be used as a positioning pin.

　配管装置１０においては、前記ボルト９は、前記雄ネジ部９ｂよりも基端側に位置する段部９ａを有し、前記段部９ａは、前記ナット１３に接触している。 In the piping device 10, the bolt 9 has a step 9a located closer to the base end than the male thread portion 9b, and the step 9a is in contact with the nut 13.

　かかる構成によれば、ボルト９に加わる力をナット１３で受けることができ、配管装置１０全体としての耐久性の向上を図ることができる。 With this configuration, the force applied to the bolt 9 can be received by the nut 13, improving the durability of the piping device 10 as a whole.

　以上、本発明の好ましい実施形態について説明したが、特許請求の範囲から逸脱しない限り、適宜変更、変形等できる。 The above describes a preferred embodiment of the present invention, but modifications and variations can be made as appropriate without departing from the scope of the claims.

１　第１流路形成部
２　第２流路形成部
３　第３流路形成部
５　軸シール
６　面シール
７　環状凸部
８　環状凹部
９　ボルト
９ａ　段部
９ｂ　雄ネジ部
１０　配管装置
１１　第１挿通孔
１２　第２挿通孔
１３　ナット
１３ａ　雌ネジ部
１３ｂ　突出部
１４　接続方向
１５　第１対向面
１６　第２対向面
１７　受入部 REFERENCE SIGNS LIST 1 First flow path forming portion 2 Second flow path forming portion 3 Third flow path forming portion 5 Shaft seal 6 Face seal 7 Annular convex portion 8 Annular concave portion 9 Bolt 9a Step portion 9b Male thread portion 10 Piping device 11 First insertion hole 12 Second insertion hole 13 Nut 13a Female thread portion 13b Protrusion portion 14 Connection direction 15 First opposing surface 16 Second opposing surface 17 Receiving portion

Claims

Three or more flow path forming parts in which a continuous flow path is formed;
a bolt that is inserted across all of the flow passage forming portions and connects all of the flow passage forming portions in series;
an axial seal provided between adjacent ones of the flow path forming portions to prevent liquid leakage from the flow path;
a surface seal provided at a location where there is no axial seal between adjacent flow path forming portions to prevent liquid leakage from the flow path;
A piping device comprising:
One of the adjacent flow path forming portions in which the shaft seal is disposed has an annular protrusion,
the other of the adjacent flow path forming portions in which the shaft seal is disposed has an annular recess into which the annular protrusion is inserted,
The shaft seal is received in the annular recess and pressed against an outer periphery of the annular protrusion,
The adjacent flow passage forming portions in which the face seals are arranged each have opposing surfaces that face each other in a direction along the axial direction of the bolt,
the face seal is compressed between the opposing faces;
one of the adjacent flow passage forming portions in which the shaft seal is arranged includes an insertion hole through which the bolt is inserted and positioned;
At least one of the adjacent flow path forming portions in which the face seal is arranged is positioned with respect to the flow path forming portion having the insertion hole by the bolt.

The piping device according to claim 1,
The bolt has a step portion,
The step portion is in contact with the opposing surface.

Three or more flow path forming parts in which a continuous flow path is formed;
a bolt that is inserted across all of the flow passage forming portions and connects all of the flow passage forming portions in series;
an axial seal provided between adjacent ones of the flow path forming portions to prevent liquid leakage from the flow path;
a surface seal provided at a location where there is no axial seal between adjacent flow path forming portions to prevent liquid leakage from the flow path;
A piping device comprising:
One of the adjacent flow path forming portions in which the shaft seal is disposed has an annular protrusion,
the other of the adjacent flow path forming portions in which the shaft seal is disposed has an annular recess into which the annular protrusion is inserted,
The shaft seal is received in the annular recess and pressed against an outer periphery of the annular protrusion,
The adjacent flow passage forming portions in which the face seals are arranged each have opposing surfaces that face each other in a direction along the axial direction of the bolt,
the face seal is compressed between the opposing faces;
The bolt has a male thread at a tip thereof,
one of the flow path forming parts includes a nut having a female thread portion into which the male thread portion is screwed;
The nut is provided on the flow path forming portion so as to protrude from one of the opposing surfaces,
the flow passage forming portion having the other opposing surface has a receiving portion that receives the nut,
the flow passage forming portion having the nut and the flow passage forming portion having the receiving portion are positioned by fitting the nut and the receiving portion.

The piping device according to claim 3,
The bolt has a step portion located on a base end side relative to the male thread portion,
The step portion is in contact with the nut.