JP2013083316A - Pipe connecting structure - Google Patents

Pipe connecting structure Download PDF

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Publication number
JP2013083316A
JP2013083316A JP2011223964A JP2011223964A JP2013083316A JP 2013083316 A JP2013083316 A JP 2013083316A JP 2011223964 A JP2011223964 A JP 2011223964A JP 2011223964 A JP2011223964 A JP 2011223964A JP 2013083316 A JP2013083316 A JP 2013083316A
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Prior art keywords
holding groove
pipe
ring
side member
convex portion
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JP5805492B2 (en
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Shigeru Akiike
茂 秋池
Kenichi Suzuki
謙一 鈴木
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Sanden Corp
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Sanden Corp
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Priority to JP2011223964A priority Critical patent/JP5805492B2/en
Priority to PCT/JP2012/076228 priority patent/WO2013054815A1/en
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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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
    • F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
    • 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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/035—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed around the spigot end before connection
    • 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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means
    • 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
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • F16B7/182—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements for coaxial connections of two rods or tubes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Joints With Pressure Members (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a pipe connecting structure capable of improving airtightness with a simple structure.SOLUTION: A width dimension W1 and a depth dimension d of a first holding groove 11c are formed smaller than a width dimension W2 of a second holding groove 11e. Thus, a first O ring 13 installed in the first holding groove 11c becomes a state of overhanging to the outside in a state of contacting with an opposing surface 11d more than a state of installing a second O ring 14 constituted of the same construction material, shape and size in the second holding groove 11e, and thus, becomes a state of being sandwiched between the opposing surface 11d of a male side member 11 and an edge part 12c of a female side member 12, and becomes a state of being sandwiched between an outer peripheral part of a projection part 11b of the male side member 11 and a wall surface of a recessed part 12b of the female side member 12, and sealability can be improved with the simple structure.

Description

本発明は、例えば、ヒートポンプ式の車両用空気調和装置等、冷媒回路を構成する冷媒管の接続に用いられる配管接続構造に関するものである。   The present invention relates to a pipe connection structure used for connecting refrigerant pipes constituting a refrigerant circuit, such as a heat pump type vehicle air conditioner.

従来、この種の配管接続構造としては、一方の管の端部が接続され、筒状の凸部を有する雄側部材と、他方の管の端部が接続され、雄側部材の凸部を挿入可能な凹部を有する雌側部材と、雄側部材の凸部の外周部に設けられ、雄側部材の凸部と雌側部材の凹部との間に位置することで管内の気密を保持するリング形状のシール部材と、を備え、一方の管と他方の管を接続するようにしたものが知られている（例えば、特許文献１参照）。   Conventionally, as this type of pipe connection structure, the end of one pipe is connected, the male side member having a cylindrical convex part and the end of the other pipe are connected, and the convex part of the male side member is A female side member having a recess that can be inserted and an outer peripheral portion of the convex portion of the male side member are located between the convex portion of the male side member and the concave portion of the female side member to maintain airtightness in the pipe. A ring-shaped seal member is provided, and one pipe is connected to the other pipe (see, for example, Patent Document 1).

前記配管接続構造では、管内の圧力と管外の圧力の差によってシール部材を内壁面に押し付けさせることにより、管内の気密を保持している。前記配管接続構造を有する車両用空気調和装置の冷媒回路では、冬季等の外気温度が低い環境で運転を行うと、冷媒回路の低圧側の圧力が大気圧よりも低くなるおそれがある。この場合、管内の圧力と管外の圧力の差が小さくなるため、シール部材の気密性能が低下し、冷媒回路に空気が流入して冷媒中に混入するおそれがある。   In the pipe connection structure, the sealing member is pressed against the inner wall surface by the difference between the pressure inside the pipe and the pressure outside the pipe, thereby maintaining the airtightness inside the pipe. In the refrigerant circuit of the vehicle air conditioner having the pipe connection structure, when operated in an environment where the outside air temperature is low such as in winter, the pressure on the low pressure side of the refrigerant circuit may be lower than the atmospheric pressure. In this case, since the difference between the pressure inside the tube and the pressure outside the tube becomes small, the sealing performance of the seal member is lowered, and air may flow into the refrigerant circuit and be mixed into the refrigerant.

そこで、大気中の空気の配管内への流入を防止するための配管接続構造として、一方および他方の配管の端部に例えばフランジを設ける等、互いに面接触可能な対向面をそれぞれ形成し、各対向面の間でシール部材を挟持することにより、配管内の気密を保持するようにしたものが知られている。   Therefore, as a pipe connection structure for preventing the inflow of air in the atmosphere into the pipe, facing surfaces that are in surface contact with each other, such as providing flanges at the ends of one and the other pipe, are formed respectively. There is known a structure in which a sealing member is sandwiched between opposing surfaces to maintain airtightness in a pipe.

特開２００５−１８０５８２号公報JP 2005-180582 A

しかし、対向面を突き合わせる構造の前記配管接続構造では、配管内の気密を保持するために対向面同士を大きな力で締結する必要があり、その際にシール部材にずれが生じたり損傷したりすることによって配管内の気密が保持できなくなるおそれがある。   However, in the pipe connection structure having a structure in which the facing surfaces are abutted, it is necessary to fasten the facing surfaces with a large force in order to maintain airtightness in the piping, and in that case, the seal member is displaced or damaged. By doing so, the airtightness in the piping may not be maintained.

本発明の目的とするところは、簡単な構造で気密性を向上させることが可能な配管接続構造を提供することにある。   An object of the present invention is to provide a pipe connection structure capable of improving airtightness with a simple structure.

本発明は、前記目的を達成するために、一方の管の端部が接続された部材または一方の管の端部に設けられた筒状の凸部と、他方の管の端部が接続された部材または他方の管の端部に設けられた凸部を挿入可能な凹部と、凸部の基端側の外周部に設けられたリング形状の第１シール部材と、凸部の先端側の外周部に設けられた第１シール部材と同一の材質、形状および大きさの第２シール部材と、を備え、第１シール部材および第２シール部材を凸部と凹部との間に位置させることで管内の気密を保持して、一方の管と他方の管とを接続する配管接続構造において、凸部の基端側には、周方向に亘って設けられ、第１シール部材を保持する第１保持溝と、第１保持溝の壁面と同一面上を凸部の外周側に延びるように設けられ、凹部の縁部が周方向に亘って対向する対向面と、が設けられ、凸部の先端側には、周方向に亘って設けられ、第２シール部材を保持する第２保持溝が設けられ、第１保持溝の幅寸法は、第２保持溝の幅寸法よりも小さく形成されている。   In order to achieve the above object, the present invention provides a member to which an end of one tube is connected or a cylindrical convex portion provided at an end of one tube and an end of the other tube. A concave portion into which the convex portion provided at the end of the other member or the other tube can be inserted, a ring-shaped first seal member provided at the outer peripheral portion on the proximal end side of the convex portion, and a distal end side of the convex portion A second seal member having the same material, shape and size as the first seal member provided on the outer peripheral portion, and the first seal member and the second seal member are positioned between the convex portion and the concave portion. In the pipe connection structure that maintains the airtightness in the pipe and connects one pipe to the other pipe, the first end of the convex portion is provided on the base end side in the circumferential direction and holds the first seal member. 1 holding groove and provided on the same surface as the wall surface of the first holding groove so as to extend to the outer peripheral side of the convex portion. A second holding groove for holding the second seal member is provided on the distal end side of the convex portion, and the second holding groove for holding the second seal member is provided. The width dimension is formed smaller than the width dimension of the second holding groove.

これにより、第１シール部材と同一の材質、形状および大きさからなる第２シール部材を第２保持溝に取り付けた状態よりも、第１保持溝に取り付けられた第１シール部材が径方向外側に張り出すことから、第１シール部材が雌側部材の凹部の縁部と対向面との間に挟まれた状態となるとともに、雄側部材の凸部の外周部と雌側部材の凹部の壁面との間で挟まれた状態となる。   As a result, the first seal member attached to the first holding groove is radially outer than the state in which the second seal member made of the same material, shape and size as the first seal member is attached to the second holding groove. Therefore, the first seal member is sandwiched between the edge of the concave portion of the female side member and the opposing surface, and the outer peripheral portion of the convex portion of the male side member and the concave portion of the female side member are It is in a state of being sandwiched between the wall surfaces.

本発明によれば、シール部材を雌側部材の凹部の縁部と対向面との間に挟まれた状態とするとともに、雄側部材の凸部の外周部と雌側部材の凹部の壁面との間で挟まれた状態とすることができるので、簡単な構造でシール性を向上させることが可能となる。   According to the present invention, the seal member is sandwiched between the edge of the concave portion of the female side member and the opposing surface, and the outer peripheral portion of the convex portion of the male side member and the wall surface of the concave portion of the female side member are Therefore, the sealing property can be improved with a simple structure.

本発明の一実施形態の配管の接続部を示す斜視図である。It is a perspective view which shows the connection part of piping of one Embodiment of this invention. 配管の接続部を示す断面図である。It is sectional drawing which shows the connection part of piping. 配管の接続部を示す分解断面図である。It is a disassembled sectional view which shows the connection part of piping. 本発明の他の実施形態を示す配管の接続部の分解断面図である。It is an exploded sectional view of the connection part of piping which shows other embodiments of the present invention. 配管の接続部を示す断面図である。It is sectional drawing which shows the connection part of piping.

図１乃至図３は、本発明の一実施形態を示すものである。   1 to 3 show an embodiment of the present invention.

本発明の配管接続構造を備えた管継手１０は、車両用空気調和装置の冷凍サイクルを構成する冷媒回路において冷媒を流通させる冷媒管の接続に用いられるものである。   The pipe joint 10 provided with the pipe connection structure of the present invention is used for connection of a refrigerant pipe through which a refrigerant flows in a refrigerant circuit constituting a refrigeration cycle of a vehicle air conditioner.

この管継手１０は、図１に示すように、アルミニウム、銅、ステンレス等からなる冷媒管２０と冷媒管３０とを接続する。   As shown in FIG. 1, the pipe joint 10 connects a refrigerant pipe 20 and a refrigerant pipe 30 made of aluminum, copper, stainless steel, or the like.

管継手１０は、冷媒管２０が接続される雄側部材１１と、冷媒管３０が接続される雌側部材１２と、雄側部材１１に保持される第１Ｏリング１３および第２Ｏリング１４と、雄側部材１１と雌側部材１２を互いに固定するためのボルト１６およびナット１７と、を有している。   The pipe joint 10 includes a male side member 11 to which the refrigerant pipe 20 is connected, a female side member 12 to which the refrigerant pipe 30 is connected, a first O ring 13 and a second O ring 14 held by the male side member 11, A bolt 16 and a nut 17 are provided for fixing the male side member 11 and the female side member 12 to each other.

雄側部材１１には、冷媒通路１１ａが設けられ、冷媒通路１１ａの一端側に冷媒管２０がロウ付け等によって接続される。また、雄側部材１１の冷媒通路１１ａの他端側には、雌側部材１２側に突出する筒状の凸部１１ｂが設けられている。凸部１１ｂの基端側には、第１Ｏリング１３を保持するための第１保持溝１１ｃが周方向に亘って設けられている。また、凸部１１ｂの基端側には、第１保持溝１１ｃの壁面と同一面上で凸部１１ｂの径方向外側に形成され、雌側部材１２に対向する対向面１１ｄが設けられている。さらに、凸部１１ｂの先端側には、第１保持溝１１ｃから所定距離をおいて第２Ｏリング１４を保持するための第２保持溝１１ｅが周方向に亘って設けられている。また、雄側部材１１には、冷媒通路１１ａと平行に延びるように設けられ、ボルト１６が挿通されるボルト挿通孔１１ｆが設けられている。   The male member 11 is provided with a refrigerant passage 11a, and the refrigerant pipe 20 is connected to one end side of the refrigerant passage 11a by brazing or the like. Further, on the other end side of the refrigerant passage 11 a of the male side member 11, a cylindrical convex portion 11 b that protrudes toward the female side member 12 is provided. A first holding groove 11c for holding the first O-ring 13 is provided on the proximal end side of the convex portion 11b in the circumferential direction. In addition, on the base end side of the convex portion 11b, a facing surface 11d that is formed on the same surface as the wall surface of the first holding groove 11c and radially outside the convex portion 11b and faces the female member 12 is provided. . Furthermore, a second holding groove 11e for holding the second O-ring 14 at a predetermined distance from the first holding groove 11c is provided on the distal end side of the convex portion 11b in the circumferential direction. Further, the male member 11 is provided with a bolt insertion hole 11f provided so as to extend in parallel with the refrigerant passage 11a and through which the bolt 16 is inserted.

ここで、第１保持溝１１ｃと第２保持溝１１ｅは、図３に示すように、それぞれ同じ深さ寸法ｄとなるように形成されている。また、第１保持溝１１ｃは、図３に示すように、幅寸法Ｗ１が第２保持溝１１ｅの幅寸法Ｗ２よりも小さく形成されている。さらに、第１保持溝１１ｃの幅寸法Ｗ１および第２保持溝１１ｅの幅寸法Ｗ２は、第１Ｏリング１３および第２Ｏリング１４の周方向断面の外径寸法Ｄよりも大きく形成されている。   Here, as shown in FIG. 3, the first holding groove 11c and the second holding groove 11e are formed to have the same depth dimension d. Further, as shown in FIG. 3, the first holding groove 11c has a width dimension W1 smaller than the width dimension W2 of the second holding groove 11e. Furthermore, the width dimension W1 of the first holding groove 11c and the width dimension W2 of the second holding groove 11e are formed larger than the outer diameter dimension D of the circumferential cross section of the first O-ring 13 and the second O-ring 14.

また、第１保持溝１１ｃおよび第２保持溝１１ｅの深さ寸法ｄは、第１Ｏリング１３および第２Ｏリング１４の周方向断面の外径寸法Ｄよりも小さく形成されている。   The depth d of the first holding groove 11c and the second holding groove 11e is formed smaller than the outer diameter D of the circumferential cross section of the first O ring 13 and the second O ring 14.

雌側部材１２には、冷媒通路１２ａが設けられ、冷媒通路１２ａの一端側に冷媒管３０がロウ付け等によって接続される。また、雌側部材１２の冷媒通路１２ａの他端側には、雄側部材１１の凸部１１ｂを挿入可能な凹部１２ｂが設けられている。また、凹部１２ｂの開口縁には、中央部に向かって下り傾斜となる部分を有する縁部１２ｃが設けられている。また、雌側部材１２には、冷媒通路１２ａと平行に延びるように設けられ、ボルト１６が挿通されるボルト挿通孔１２ｄが設けられている。   The female member 12 is provided with a refrigerant passage 12a, and the refrigerant pipe 30 is connected to one end side of the refrigerant passage 12a by brazing or the like. Further, a concave portion 12 b into which the convex portion 11 b of the male side member 11 can be inserted is provided on the other end side of the refrigerant passage 12 a of the female side member 12. Moreover, the edge part 12c which has a part which becomes a downward inclination toward the center part is provided in the opening edge of the recessed part 12b. Further, the female member 12 is provided with a bolt insertion hole 12d provided so as to extend in parallel with the refrigerant passage 12a and through which the bolt 16 is inserted.

第１Ｏリング１３および第２Ｏリング１４は、それぞれ冷媒回路に充填される冷媒の透過率の低いゴム材料からなり、互いに同一の材質、形状および大きさに形成されている。
第１Ｏリング１３および第２Ｏリング１４は、第１保持溝１１ｃおよび第２保持溝１１ｅの幅寸法Ｗ１，Ｗ２に応じて、凸部１１ｂの径方向外側への張り出す寸法が変化する。第１Ｏリング１３および第２Ｏリング１４は、第１保持溝１１ｃおよび第２保持溝１１ｅの幅寸法Ｗ１，Ｗ２を小さく形成することにより、凸部１１ｂの径方向外側への張り出す寸法を大きくすることが可能である。 The first O-ring 13 and the second O-ring 14 are each made of a rubber material having a low permeability of the refrigerant filled in the refrigerant circuit, and are formed in the same material, shape and size.
The dimensions of the first O-ring 13 and the second O-ring 14 projecting outward in the radial direction of the convex portion 11b change according to the width dimensions W1, W2 of the first holding groove 11c and the second holding groove 11e. The first O-ring 13 and the second O-ring 14 are formed so that the widths W1 and W2 of the first holding groove 11c and the second holding groove 11e are reduced, thereby increasing the size of the protrusion 11b protruding outward in the radial direction. It is possible.

以上のように構成された配管接続構造において、冷媒管２０と冷媒管３０を接続する方法を説明する。まず、雄側部材１１に、冷媒管２０を接続するとともに、第１保持溝１１ｃおよび第２保持溝１１ｅに第１Ｏリング１３および第２Ｏリング１４を取り付ける。次に、雌側部材１２に、冷媒管３０を接続する。最後に、雄側部材１１の凸部１１ｂを雌側部材１２の凹部１２ｂに挿入した後、ボルト１６をボルト挿通孔１１ｆ，１２ｄに挿通してネジ部分にワッシャ１８を介してナット１７を螺合することにより雄側部材１１と雌側部材１２とを固定する。   A method of connecting the refrigerant pipe 20 and the refrigerant pipe 30 in the pipe connection structure configured as described above will be described. First, the refrigerant pipe 20 is connected to the male member 11, and the first O-ring 13 and the second O-ring 14 are attached to the first holding groove 11c and the second holding groove 11e. Next, the refrigerant pipe 30 is connected to the female member 12. Finally, after the convex portion 11b of the male side member 11 is inserted into the concave portion 12b of the female side member 12, the bolt 16 is inserted into the bolt insertion holes 11f and 12d, and the nut 17 is screwed into the screw portion via the washer 18. By doing so, the male member 11 and the female member 12 are fixed.

このとき、第１Ｏリング１３は、雄側部材１１の対向面１１ｄと雌側部材１２の縁部１２ｃとの間で挟まれた状態となることで、配管内の気密を保持している。また、第２Ｏリング１４は、雄側部材１１の凸部１１ｂの外周部と雌側部材１２の凹部１２ｂの壁面との間で挟まれた状態となることで、配管内の気密を保持している。   At this time, the first O-ring 13 is held between the facing surface 11d of the male side member 11 and the edge portion 12c of the female side member 12, thereby maintaining airtightness in the pipe. Further, the second O-ring 14 is sandwiched between the outer peripheral portion of the convex portion 11b of the male side member 11 and the wall surface of the concave portion 12b of the female side member 12, thereby maintaining airtightness in the pipe. Yes.

また、第１保持溝１１ｃは、幅寸法Ｗ１および深さ寸法ｄが、第２保持溝１１ｅの幅寸法Ｗ２よりも小さく形成されている。このため、第１保持溝１１ｃに取り付けられた第１Ｏリング１３は、第２保持溝１１ｅに取り付けられた第２Ｏリング１４と比較して、対向面１１ｄに接触した状態で凸部１１ｂの径方向外側に張り出した状態となる。したがって、第１Ｏリング１３は、雄側部材１１の対向面１１ｄと雌側部材１２の縁部１２ｃとの間で挟まれた状態となるだけでなく、雄側部材１１の凸部１１ｂの外周部と雌側部材１２の凹部１２ｂの壁面との間で挟まれた状態となる。   The first holding groove 11c is formed such that the width dimension W1 and the depth dimension d are smaller than the width dimension W2 of the second holding groove 11e. Therefore, the first O-ring 13 attached to the first holding groove 11c is in the radial direction of the convex portion 11b in a state of being in contact with the facing surface 11d, as compared with the second O-ring 14 attached to the second holding groove 11e. It will be in the state of projecting outward. Accordingly, the first O-ring 13 is not only sandwiched between the facing surface 11d of the male member 11 and the edge 12c of the female member 12, but also the outer peripheral portion of the convex portion 11b of the male member 11. And the wall surface of the concave portion 12b of the female side member 12.

このように、本実施形態の配管接続構造によれば、第１保持溝１１ｃの幅寸法Ｗ１および深さ寸法ｄが、第２保持溝１１ｅの幅寸法Ｗ２よりも小さく形成されている。これにより、第１保持溝１１ｃに取り付けられた第１Ｏリング１３は、同一の材質、形状および大きさからなる第２Ｏリング１４を第２保持溝１１ｅに取り付けた状態よりも、対向面１１ｄに接触した状態で外側に張り出した状態となる。したがって、雄側部材１１の対向面１１ｄと雌側部材１２の縁部１２ｃとの間で挟まれた状態となるとともに、雄側部材１１の凸部１１ｂの外周部と雌側部材１２の凹部１２ｂの壁面との間で挟まれた状態となり、簡単な構造でシール性を向上させることが可能となる。   Thus, according to the pipe connection structure of the present embodiment, the width dimension W1 and the depth dimension d of the first holding groove 11c are formed smaller than the width dimension W2 of the second holding groove 11e. As a result, the first O-ring 13 attached to the first holding groove 11c comes into contact with the opposing surface 11d rather than the state in which the second O-ring 14 made of the same material, shape and size is attached to the second holding groove 11e. It will be in the state which protruded outside in the state which carried out. Accordingly, the male side member 11 is sandwiched between the facing surface 11d and the female side member 12 edge 12c, and the outer peripheral portion of the convex portion 11b of the male side member 11 and the concave portion 12b of the female side member 12 are provided. It becomes the state pinched | interposed between these wall surfaces, and it becomes possible to improve a sealing performance with a simple structure.

また、凸部１１ｂおよび凹部１２ｂは、それぞれ冷媒管２０，３０が接続される雄側部材１１および雌側部材１２に形成されている。これにより、冷媒管２０，３０の端部を切削加工や板金加工等を施すことなく、冷媒管２０，３０を接続することができるので、冷媒管２０，３０の接続作業が容易となる。   Moreover, the convex part 11b and the recessed part 12b are respectively formed in the male side member 11 and the female side member 12 to which the refrigerant pipes 20 and 30 are connected. Thereby, since the refrigerant pipes 20 and 30 can be connected without subjecting the end portions of the refrigerant pipes 20 and 30 to cutting or sheet metal processing, connection work of the refrigerant pipes 20 and 30 is facilitated.

図４および図５は、本発明の他の実施形態を示すものである。尚、前記実施形態と同様の構成部分には同一の符号を付して示す。   4 and 5 show another embodiment of the present invention. In addition, the same code | symbol is attached | subjected and shown to the component similar to the said embodiment.

本実施形態の配管接続構造は、冷媒管２０の端部に設けられた凸部４１と、冷媒管３０が接続されるユニオンネジ４２と、冷媒管２０の外周部に取り付けられるユニオンナット４３と、を有している。   The pipe connection structure of the present embodiment includes a convex portion 41 provided at the end of the refrigerant pipe 20, a union screw 42 to which the refrigerant pipe 30 is connected, a union nut 43 attached to the outer periphery of the refrigerant pipe 20, have.

凸部４１は、冷媒管２０の端部を加工することによって、第１保持溝４１ａ、第２保持溝４１ｂ、および、第１保持溝４１ａの壁面と同一平面上で周方向に亘って外側に延びるフランジ４１ｃが形成されている。フランジ４１ｃの端部側の面が、対向面４１ｄとなる。   The convex portion 41 is formed on the outer surface in the circumferential direction on the same plane as the wall surfaces of the first holding groove 41a, the second holding groove 41b, and the first holding groove 41a by processing the end portion of the refrigerant pipe 20. An extending flange 41c is formed. A surface on the end side of the flange 41c is a facing surface 41d.

第１保持溝４１ａと第２保持溝４１ｂは、図４に示すように、前記実施形態と同様に、それぞれ同じ深さ寸法ｄとなるように形成されている。また、第１保持溝４１ａは、図４に示すように、幅寸法Ｗ１が第２保持溝４１ｂの幅寸法Ｗ２よりも小さく形成されている。さらに、第１保持溝４１ａの幅寸法Ｗ１および第２保持溝４１ｂの幅寸法Ｗ２は、第１Ｏリング１３および第２Ｏリング１４の周方向断面の外径寸法Ｄよりも大きく形成されている。   As shown in FIG. 4, the first holding groove 41a and the second holding groove 41b are formed so as to have the same depth dimension d as in the above embodiment. As shown in FIG. 4, the first holding groove 41a has a width dimension W1 smaller than the width dimension W2 of the second holding groove 41b. Furthermore, the width dimension W1 of the first holding groove 41a and the width dimension W2 of the second holding groove 41b are formed larger than the outer diameter dimension D of the circumferential cross section of the first O-ring 13 and the second O-ring 14.

また、第１保持溝４１ａおよび第２保持溝４１ｂの深さ寸法ｄは、第１Ｏリング１３および第２Ｏリング１４の周方向断面の外径寸法Ｄよりも小さく形成されている。   The depth d of the first holding groove 41a and the second holding groove 41b is formed smaller than the outer diameter D of the circumferential cross section of the first O ring 13 and the second O ring 14.

ユニオンネジ４２は、冷媒通路４２ａが設けられ、冷媒通路４２ａの一端側に冷媒管３０がロウ付け等によって接続される。また、ユニオンネジ４２の冷媒通路４２ａの他端側には、凸部４１を挿入可能な凹部４２ｂが設けられている。また、凹部４２ｂの開口縁には、縁部４２ｃが設けられている。また、ユニオンネジ４２の他端側の外周部には、ユニオンナット４３が螺合可能な雄ネジ部４２ｄが設けられている。   The union screw 42 is provided with a refrigerant passage 42a, and the refrigerant pipe 30 is connected to one end side of the refrigerant passage 42a by brazing or the like. Further, a recess 42 b into which the protrusion 41 can be inserted is provided on the other end side of the refrigerant passage 42 a of the union screw 42. Moreover, the edge part 42c is provided in the opening edge of the recessed part 42b. Further, a male screw portion 42 d to which the union nut 43 can be screwed is provided on the outer peripheral portion on the other end side of the union screw 42.

ユニオンナット４３には、ユニオンネジ４２の雄ネジ部４２ｄが螺合可能な雌ネジ部４３ａが設けられている。また、ユニオンナット４３の内周部には、凸部４１のフランジ４１ｃに係合することで、凸部４１とユニオンネジ４２との接続状態を保持するための係合部４３ｂが設けられている。   The union nut 43 is provided with a female screw portion 43a to which a male screw portion 42d of the union screw 42 can be screwed. In addition, an engagement portion 43 b for holding the connection state between the convex portion 41 and the union screw 42 by engaging with the flange 41 c of the convex portion 41 is provided on the inner peripheral portion of the union nut 43. .

以上のように構成された配管接続構造において、冷媒管２０と冷媒管３０を接続する方法を説明する。まず、まず、冷媒管２０の凸部４１の第１保持溝４１ａおよび第２保持溝４１ｂに、第１Ｏリング１３および第２Ｏリング１４を取り付ける。次に、ユニオンネジ４２の凹部４２ｂに凸部４１を挿入して、ユニオンナット４３をユニオンネジ４２に螺合して凸部４１をユニオンネジ４２に固定する。   A method of connecting the refrigerant pipe 20 and the refrigerant pipe 30 in the pipe connection structure configured as described above will be described. First, the first O ring 13 and the second O ring 14 are attached to the first holding groove 41 a and the second holding groove 41 b of the convex portion 41 of the refrigerant pipe 20. Next, the convex portion 41 is inserted into the concave portion 42 b of the union screw 42, and the union nut 43 is screwed into the union screw 42 to fix the convex portion 41 to the union screw 42.

このように、本実施形態の配管接続構造によれば、前記実施形態と同様に、第１保持溝４１ａに取り付けられた第１Ｏリング１３は、同一の材質、形状および大きさからなる第２Ｏリング１４を第２保持溝４１ｂに取り付けた状態よりも、対向面４１ｄに接触した状態で外側に張り出した状態となる。したがって、凸部４１の対向面４１ｄとユニオンネジ４２の縁部４２ｃとの間で挟まれた状態となるとともに、凸部４１の外周部とユニオンネジ４２の凹部４２ｂの壁面との間で挟まれた状態となり、簡単な構造でシール性を向上させることが可能となる。   Thus, according to the pipe connection structure of the present embodiment, the first O-ring 13 attached to the first holding groove 41a is the second O-ring made of the same material, shape and size, as in the previous embodiment. It will be in the state which protruded outside in the state which contacted the opposing surface 41d rather than the state which attached 14 to the 2nd holding groove 41b. Therefore, it is sandwiched between the opposing surface 41d of the convex portion 41 and the edge portion 42c of the union screw 42, and is sandwiched between the outer peripheral portion of the convex portion 41 and the wall surface of the concave portion 42b of the union screw 42. It becomes possible to improve the sealing performance with a simple structure.

また、凸部４１は、冷媒管２０の端部に形成されている。これにより、冷媒管２０，３０の接続に必要な部品点数を低減することが可能となり、製造コストの低減を図ることが可能となる。   Further, the convex portion 41 is formed at the end of the refrigerant pipe 20. Thereby, it becomes possible to reduce the number of parts required for the connection of the refrigerant pipes 20 and 30, and to reduce the manufacturing cost.

尚、前記実施形態では、車両用空気調和装置の冷媒管２０，３０を接続するようにしたものを示したが、これに限られるものではない。例えば、建物に用いられる空気調和装置や冷蔵庫等の冷熱機器の冷媒回路の冷媒管の接続に適用してもよい。また、冷媒管を接続するものに限られず、例えば、給水用の管を接続する場合やガス供給用の管を接続する場合に用いてもよい。   In addition, although the said embodiment showed what connected the refrigerant | coolant pipe | tubes 20 and 30 of the vehicle air conditioner, it is not restricted to this. For example, you may apply to the connection of the refrigerant pipe of the refrigerant circuit of refrigeration equipment, such as an air conditioning apparatus used for a building, and a refrigerator. Moreover, it is not restricted to what connects a refrigerant | coolant pipe | tube, For example, you may use when connecting the pipe | tube for water supply, or connecting the pipe | tube for gas supply.

また、前記実施形態では、冷媒管２０，３０を管継手１０によって接続するものや、冷媒管２０の端部に凸部４１を形成して冷媒管２０，３０を接続するようにしたものを示したが、これに限られるものではない。冷媒管２０，３０のそれぞれに凸部および凹部を形成可能であれば、凸部および凹部の一方または両方を切削加工や板金加工等によって形成するようにしてもよい。   Moreover, in the said embodiment, what connected the refrigerant | coolant pipe | tubes 20 and 30 by the pipe joint 10, and what formed the convex part 41 in the edge part of the refrigerant | coolant pipe | tube 20, and connected the refrigerant | coolant pipe | tubes 20 and 30 are shown. However, it is not limited to this. If a convex part and a concave part can be formed in each of the refrigerant tubes 20 and 30, one or both of the convex part and the concave part may be formed by cutting or sheet metal processing.

１０…管継手、１１…雄側部材、１１ａ…冷媒通路、１１ｂ…凸部、１１ｃ…第１保持溝、１１ｄ…対向面、１１ｅ…第２保持溝、１２…雌側部材、１２ａ…冷媒通路、１２ｂ…凹部、１２ｃ…縁部、１３…第１Ｏリング、１４…第２Ｏリング、２０…冷媒管、３０…冷媒管、４１…凸部、４１ａ…第１保持溝、４１ｂ…第２保持溝、４１ｃ…フランジ、４１ｄ…対向面、４２…ユニオンネジ、４２ｂ…凹部、４３…ユニオンナット。   DESCRIPTION OF SYMBOLS 10 ... Pipe joint, 11 ... Male side member, 11a ... Refrigerant passage, 11b ... Protruding part, 11c ... 1st holding groove, 11d ... Opposite surface, 11e ... 2nd holding groove, 12 ... Female side member, 12a ... Refrigerant passage , 12b ... recess, 12c ... edge, 13 ... first O-ring, 14 ... second O-ring, 20 ... refrigerant pipe, 30 ... refrigerant pipe, 41 ... convex, 41a ... first holding groove, 41b ... second holding groove , 41c, flange, 41d, facing surface, 42, union screw, 42b, recess, 43, union nut.

Claims (1)

一方の管の端部が接続された部材または一方の管の端部に設けられた筒状の凸部と、他方の管の端部が接続された部材または他方の管の端部に設けられた凸部を挿入可能な凹部と、凸部の基端側の外周部に設けられたリング形状の第１シール部材と、凸部の先端側の外周部に設けられた第１シール部材と同一の材質、形状および大きさの第２シール部材と、を備え、第１シール部材および第２シール部材を凸部と凹部との間に位置させることで管内の気密を保持して、一方の管と他方の管とを接続する配管接続構造において、
凸部の基端側には、周方向に亘って設けられ、第１シール部材を保持する第１保持溝と、第１保持溝の壁面と同一面上を凸部の外周側に延びるように設けられ、凹部の縁部が周方向に亘って対向する対向面と、が設けられ、
凸部の先端側には、周方向に亘って設けられ、第２シール部材を保持する第２保持溝が設けられ、
第１保持溝の幅寸法は、第２保持溝の幅寸法よりも小さく形成されている
ことを特徴とする配管接続構造。 A tube-shaped convex portion provided at the end of one tube or the end of one tube and a member connected to the end of the other tube or the end of the other tube The same as the concave part into which the convex part can be inserted, the ring-shaped first seal member provided on the outer peripheral part on the proximal end side of the convex part, and the first seal member provided on the outer peripheral part on the distal end side of the convex part A second seal member of the same material, shape and size, and maintaining the airtightness in the pipe by positioning the first seal member and the second seal member between the convex part and the concave part. In the pipe connection structure that connects the other pipe with
A base end side of the convex portion is provided in the circumferential direction so as to extend to the outer peripheral side of the convex portion on the same surface as the first holding groove that holds the first seal member and the wall surface of the first holding groove. Provided, and an opposing surface in which the edge of the concave portion faces in the circumferential direction is provided,
A second holding groove that is provided over the circumferential direction and holds the second seal member is provided on the tip side of the convex portion,
The pipe connection structure, wherein the width dimension of the first holding groove is smaller than the width dimension of the second holding groove.
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