JPH09257164A - Pipe connecting structure - Google Patents
Pipe connecting structureInfo
- Publication number
- JPH09257164A JPH09257164A JP6452496A JP6452496A JPH09257164A JP H09257164 A JPH09257164 A JP H09257164A JP 6452496 A JP6452496 A JP 6452496A JP 6452496 A JP6452496 A JP 6452496A JP H09257164 A JPH09257164 A JP H09257164A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- connecting member
- annular
- tubular body
- tubular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000000465 moulding Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属製の第１の管
体と第２の管体とを相互に接続するための管体の接続構
造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting structure for mutually connecting a metal first pipe and a second pipe.
【０００２】[0002]
【従来の技術】近時、自動車においては、軽量化および
コスト低減の要請から排気管の薄肉化が図られており、
排気管の接続部については、排気管の薄肉化によるアー
ク溶接の困難性から溶接を用いない接続構造が要望され
ている。従来、このように溶接を用いない管体の接続構
造として、例えば、特開平６−１１０７７号公報に開示
されるものが知られている。2. Description of the Related Art In recent years, in automobiles, exhaust pipes have been made thinner due to demands for weight reduction and cost reduction.
Regarding the connection part of the exhaust pipe, a connection structure that does not use welding is demanded due to the difficulty of arc welding due to the thinning of the exhaust pipe. Conventionally, as a connection structure for a pipe body that does not use welding, for example, a structure disclosed in Japanese Patent Application Laid-Open No. H06-11077 is known.
【０００３】図３は、この公報に開示される管体の接続
構造を示すもので、この管体の接続構造では、第１の管
体１１の端部および第２の管体１３の端部の外側に、連
結部材１５が被嵌され、連結部材１５から内側に突出し
て形成される環状突部１５ａにより、第１の管体１１お
よび第２の管体１３が塑性変形され、第１の管体１１お
よび第２の管体１３に内側に突出する環状突部１１ａ，
１３ａが形成されている。FIG. 3 shows the connecting structure of the pipes disclosed in this publication. In this connecting structure of pipes, the end of the first pipe 11 and the end of the second pipe 13 are shown. The coupling member 15 is fitted on the outer side of the first tubular body 11 and the second tubular body 13 are plastically deformed by the annular projection 15a formed so as to project inward from the coupling member 15, and the first tubular body 11 and the second tubular body 13 are plastically deformed. An annular protrusion 11a protruding inward from the tube body 11 and the second tube body 13,
13a are formed.
【０００４】なお、連結部材１５の外周には、予め、図
４に示すような環状溝１５ｂが形成され、第１の管体１
１および第２の管体１３に連結部材１５を被嵌した状態
で、連結部材１５の両端を圧力Ｐで押圧すると、連結部
材１５が環状溝１５ｂの部分で座屈し環状突部１５ａが
形成される。このような管体の接続構造では、連結部材
１５の環状突部１５ａが、第１の管体１１および第２の
管体１３の環状突部１１ａ，１３ａに密着するため、溶
接を用いることなしに良好なシール性を得ることができ
る。An annular groove 15b as shown in FIG. 4 is formed on the outer periphery of the connecting member 15 in advance, and the first tubular body 1 is formed.
When both ends of the connecting member 15 are pressed with the pressure P in a state where the connecting member 15 is fitted to the first and second pipes 13, the connecting member 15 buckles at the portion of the annular groove 15b to form an annular protrusion 15a. You. In such a tube connection structure, since the annular projection 15a of the connecting member 15 is in close contact with the annular projections 11a and 13a of the first tube 11 and the second tube 13, no welding is used. And good sealing properties can be obtained.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の管体の接続構造では、連結部材１５の両端を
押圧し、予め連結部材１５に形成される環状溝１５ｂを
座屈させて環状突部１５ａを形成しているため、環状突
部１５ａの深さを深くすることが困難であり、例えば、
第１の管体１１および第２の管体１３の直径が２０mm程
度より大きくなると良好なシール性を得ることが困難に
なるという問題があった。However, in such a conventional pipe connection structure, both ends of the connecting member 15 are pressed, and an annular groove 15b formed in the connecting member 15 is buckled in advance to form an annular protrusion. Since the portion 15a is formed, it is difficult to increase the depth of the annular protrusion 15a.
When the diameters of the first tube body 11 and the second tube body 13 are larger than about 20 mm, there is a problem that it becomes difficult to obtain a good sealing property.
【０００６】本発明は、かかる従来の問題を解決するた
めになされたもので、シール性を維持しながら第１の管
体と第２の管体とを容易，確実に接続することができる
管体の接続構造を提供することを目的とする。The present invention has been made in order to solve such a conventional problem, and is a pipe which can easily and surely connect the first pipe body and the second pipe body while maintaining the sealing property. It is intended to provide a body connection structure.
【０００７】[0007]
【課題を解決するための手段】請求項１の管体の接続構
造は、金属製の第１の管体と第２の管体とを相互に接続
する管体の接続構造において、前記第１の管体の端部お
よび第２の管体の端部を、筒状の金属製の連結部材の一
側および他側に嵌挿するとともに、前記連結部材の熱膨
張係数を、前記第１の管体および第２の管体の熱膨張係
数より小さくしてなることを特徴とする。According to a first aspect of the present invention, there is provided a connection structure for connecting a first pipe body and a second pipe body, which are made of metal, to each other. The end portion of the tubular body and the end portion of the second tubular body are fitted and inserted into one side and the other side of the tubular metal connecting member, and the thermal expansion coefficient of the connecting member is set to the first side. It is characterized in that it is smaller than the thermal expansion coefficient of the tubular body and the second tubular body.
【０００８】請求項２の管体の接続構造は、金属製の第
１の管体と第２の管体とを相互に接続する管体の接続構
造において、前記第１の管体の端部および第２の管体の
端部の外周に沿って内側に突出する環状凹部を形成する
とともに、前記第１の管体および第２の管体の端部を、
筒状の金属製の連結部材の一側および他側に嵌挿し、前
記連結部材の前記環状凹部に対応する位置に前記環状凹
部に密着する環状溝を形成してなることを特徴とする。According to a second aspect of the present invention, there is provided a connecting structure for connecting a first tubular body and a second tubular body made of metal to each other, wherein an end portion of the first tubular body is connected. And an annular recess projecting inward along the outer circumference of the end of the second pipe, and the end of the first pipe and the end of the second pipe,
It is characterized in that a tubular metal connecting member is fitted and inserted into one side and the other side, and an annular groove is formed at a position corresponding to the annular recess of the connecting member so as to be in close contact with the annular recess.
【０００９】請求項３の管体の接続構造は、金属製の第
１の管体と第２の管体とを相互に接続する管体の接続構
造において、前記第１の管体の端部および第２の管体の
端部の外周に沿って内側に突出する環状凹部を形成する
とともに、前記第１の管体および第２の管体の端部を、
筒状の金属製の連結部材の一側および他側に嵌挿し、前
記連結部材の前記環状凹部に対応する位置に前記環状凹
部に密着する環状溝を形成し、前記連結部材の熱膨張係
数を、前記第１の管体および第２の管体の熱膨張係数よ
り小さくしてなることを特徴とする。According to a third aspect of the present invention, there is provided a tubular body connecting structure for mutually connecting a first tubular body and a second tubular body made of metal, wherein an end portion of the first tubular body is provided. And an annular recess projecting inward along the outer circumference of the end of the second pipe, and the end of the first pipe and the end of the second pipe,
A tubular metal connecting member is fitted and inserted into one side and the other side, and an annular groove is formed in close contact with the annular recess at a position corresponding to the annular recess of the connecting member, and a thermal expansion coefficient of the connecting member is set. The coefficient of thermal expansion is smaller than that of the first tube body and the second tube body.
【００１０】請求項４の管体の接続構造は、請求項２ま
たは３記載の管体の接続構造において、前記第１の管体
および第２の管体の環状凹部を、軸長方向に対して傾斜
してなることを特徴とする。According to a fourth aspect of the present invention, there is provided a tubular body connecting structure according to the second or third aspect of the present invention, wherein the annular recesses of the first and second tubular bodies are arranged in the axial direction. It is characterized by being inclined.
【００１１】（作用）請求項１の管体の接続構造では、
第１の管体および第２の管体内を、例えば、温度の高い
自動車用エンジンの排ガスが流通される。(Operation) In the connecting structure of the pipe body according to claim 1,
Exhaust gas of a high-temperature automobile engine, for example, flows through the first pipe body and the second pipe body.
【００１２】そして、排ガスの流通により第１の管体、
第２の管体および連結部材の温度が上昇するが、連結部
材の熱膨張係数が、第１の管体および第２の管体の熱膨
張係数より小さいため、連結部材の膨張が第１の管体お
よび第２の管体の膨張より小さくなり、第１の管体およ
び第２の管体の外周が、連結部材の内周に密着される。
請求項２の管体の接続構造では、第１の管体および第２
の管体の外側に嵌合される連結部材の環状溝が、第１の
管体および第２の管体の環状凹部に密着されシール性が
確保される。Then, the first pipe body is provided by the circulation of the exhaust gas,
Although the temperatures of the second pipe body and the connecting member rise, the thermal expansion coefficient of the connecting member is smaller than the thermal expansion coefficients of the first pipe body and the second pipe body, so that the expansion of the connecting member is the first. The expansion is smaller than the expansion of the pipe body and the second pipe body, and the outer peripheries of the first pipe body and the second pipe body are brought into close contact with the inner periphery of the connecting member.
In the connecting structure of the pipe body according to claim 2, the first pipe body and the second pipe body are provided.
The annular groove of the connecting member fitted to the outside of the tubular body is closely adhered to the annular concave portions of the first tubular body and the second tubular body, and the sealing performance is secured.
【００１３】また、連結部材への環状溝の形成は、例え
ば、プレス成形，ロール成形等により連結部材を塑性変
形することにより行われる。請求項３の管体の接続構造
では、第１の管体および第２の管体内を、例えば、温度
の高い自動車用エンジンの排ガスが流通される。そし
て、排ガスの流通により第１の管体、第２の管体および
連結部材の温度が上昇するが、連結部材の熱膨張係数
が、第１の管体および第２の管体の熱膨張係数より小さ
いため、連結部材の膨張が第１の管体および第２の管体
の膨張より小さくなり、第１の管体および第２の管体の
外周が、連結部材の内周に密着される。The annular groove is formed in the connecting member by, for example, plastically deforming the connecting member by press molding, roll molding, or the like. According to the third aspect of the present invention, the exhaust gas of a high temperature automobile engine is circulated in the first and second pipe bodies. Then, the temperature of the first pipe body, the second pipe body, and the connecting member rises due to the flow of the exhaust gas, but the thermal expansion coefficient of the connecting member is the thermal expansion coefficient of the first pipe body and the second pipe body. Since it is smaller, the expansion of the connecting member is smaller than the expansion of the first pipe body and the second pipe body, and the outer peripheries of the first pipe body and the second pipe body are in close contact with the inner periphery of the connecting member. .
【００１４】また、第１の管体および第２の管体の外側
に嵌合される連結部材の環状溝が、第１の管体および第
２の管体の環状凹部に密着されシール性が確保される。
さらに、連結部材への環状溝の形成は、例えば、プレス
成形，ロール成形等により連結部材を塑性変形すること
により行われる。請求項４の管体の接続構造では、第１
の管体および第２の管体の環状凹部を、軸長方向に対し
て傾斜して形成したので、連結部材の環状溝も軸長方向
に対して傾斜して形成され、これにより、第１の管体と
第２の管体との相対的な回動が阻止される。Further, the annular groove of the connecting member fitted to the outside of the first tube body and the second tube body is brought into close contact with the annular recesses of the first tube body and the second tube body, and the sealing performance is improved. Reserved.
Furthermore, the formation of the annular groove in the connecting member is performed by plastically deforming the connecting member by, for example, press forming, roll forming, or the like. In the connection structure of the pipe body according to claim 4,
Since the annular recesses of the tube body and the second tube body are formed to be inclined with respect to the axial direction, the annular groove of the connecting member is also formed to be inclined with respect to the axial direction. The relative rotation of the tube body of the second tube and the second tube body is prevented.
【００１５】[0015]
【発明の実施の形態】以下、本発明の詳細を図面に示す
実施形態について説明する。図１は、本発明の管体の接
続構造の第１の実施形態を示しており、図において符号
２１は円筒状の第１の管体を、符号２３は円筒状の第２
の管体を示している。第１の管体２１および第２の管体
２３は、ステンレス鋼等の金属からなり、例えば、エン
ジンの排ガスが流通される排気管として使用される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of a connecting structure of a pipe body according to the present invention. In the drawing, reference numeral 21 is a cylindrical first pipe body, and reference numeral 23 is a cylindrical second pipe body.
Shows the tubular body. The first pipe body 21 and the second pipe body 23 are made of metal such as stainless steel, and are used, for example, as an exhaust pipe through which exhaust gas of an engine flows.
【００１６】第１の管体２１の端部および第２の管体２
３の端部には、その外周に沿って内側に突出する台形状
の環状凹部２１ａ，２３ａが形成されている。この環状
凹部２１ａ，２３ａは、例えば、プレス成形，ロール成
形等により形成される。第１の管体２１および第２の管
体２３の端部は、円筒状の金属製の連結部材２５の一側
および他側に嵌挿されている。The end of the first tubular body 21 and the second tubular body 2
Trapezoidal annular recesses 21a and 23a are formed at the ends of the groove 3 so as to protrude inward along the outer circumference thereof. The annular recesses 21a and 23a are formed by, for example, press molding or roll molding. The ends of the first pipe body 21 and the second pipe body 23 are fitted and inserted into one side and the other side of the cylindrical metal connecting member 25.
【００１７】そして、連結部材２５には、第１の管体２
１および第２の管体２３の環状凹部２１ａ，２３ａに対
応する位置に、環状凹部２１ａ，２３ａに密着する環状
溝２５ａ，２５ｂが形成されている。この環状溝２５
ａ，２５ｂは、例えば、プレス成形，ロール成形等によ
り、連結部材２５を、第１の管体２１および第２の管体
２３の環状凹部２１ａ，２３ａに沿って塑性変形するこ
とにより形成される。The connecting member 25 has a first tube body 2
Annular grooves 25a and 25b that are in close contact with the annular recesses 21a and 23a are formed at positions corresponding to the annular recesses 21a and 23a of the first and second pipe bodies 23, respectively. This annular groove 25
The a and 25b are formed by plastically deforming the connecting member 25 along the annular recesses 21a and 23a of the first tube body 21 and the second tube body 23 by, for example, press molding, roll molding, or the like. .
【００１８】この実施形態では、連結部材２５の肉厚
は、第１の管体２１および第２の管体２３の肉厚より充
分に小さくされている。そして、第１の管体２１および
第２の管体２３の外径は、例えば、５０〜１５０mmとさ
れ、肉厚が、０．６〜１．２mmとされる。また、連結部
材２５の肉厚は、０．４〜１．０mmとされる。In this embodiment, the wall thickness of the connecting member 25 is made sufficiently smaller than the wall thicknesses of the first tube body 21 and the second tube body 23. The outer diameter of the first tubular body 21 and the second tubular body 23 is, for example, 50 to 150 mm, and the wall thickness is 0.6 to 1.2 mm. The wall thickness of the connecting member 25 is 0.4 to 1.0 mm.
【００１９】そして、連結部材２５には、熱膨張係数
が、第１の管体２１および第２の管体２３の熱膨張係数
より小さな材料が用いられている。すなわち、連結部材
２５には、例えば、熱膨張係数が１０．１×１０-6／℃
のＳＵＳ４１０が用いられ、一方、第１の管体２１およ
び第２の管体２３には、例えば、熱膨張係数が１７．８
×１０-6／℃のＳＵＳ３０４が用いられている。The connecting member 25 is made of a material having a coefficient of thermal expansion smaller than that of the first tube body 21 and the second tube body 23. That is, the connecting member 25 has, for example, a thermal expansion coefficient of 10.1 × 10 −6 / ° C.
SUS410 is used, while the first tube body 21 and the second tube body 23 have, for example, a thermal expansion coefficient of 17.8.
SUS304 of × 10 -6 / ° C is used.
【００２０】以上のように構成された管体の接続構造で
は、第１の管体２１および第２の管体２３内を、例え
ば、高温の排ガスが流通すると、連結部材２５の膨張が
第１の管体２１および第２の管体２３の膨張より小さく
なり、第１の管体２１および第２の管体２３の外周が、
連結部材２５の内周に密着するため、シール性を維持し
ながら第１の管体２１と第２の管体２３とを容易，確実
に接続することができる。In the pipe connecting structure constructed as described above, for example, when high-temperature exhaust gas flows through the first pipe 21 and the second pipe 23, the expansion of the connecting member 25 becomes the first. Is smaller than the expansion of the tubular body 21 and the second tubular body 23, and the outer circumferences of the first tubular body 21 and the second tubular body 23 are
Since the inner periphery of the connecting member 25 is in close contact, the first pipe body 21 and the second pipe body 23 can be connected easily and reliably while maintaining the sealing property.
【００２１】また、第１の管体２１および第２の管体２
３の外側に嵌合される連結部材２５の環状溝２５ａ，２
５ｂを、第１の管体２１および第２の管体２３の環状凹
部２１ａ，２３ａに密着するようにしたので、シール性
を維持しながら第１の管体２１と第２の管体２３とを容
易，確実に接続することができる。さらに、上述した管
体の接続構造では、連結部材２５の肉厚を、第１の管体
２１および第２の管体２３の肉厚より充分に小さくした
ので、連結部材２５への環状溝２５ａ，２５ｂの形成が
容易になり、連結部材２５の環状溝２５ａ，２５ｂを、
第１の管体２１および第２の管体２３の環状凹部２１
ａ，２３ａに確実に密着することができる。Further, the first tube body 21 and the second tube body 2
3, the annular grooves 25a, 2 of the connecting member 25 fitted to the outside of
Since 5b is brought into close contact with the annular recesses 21a and 23a of the first tube body 21 and the second tube body 23, the first tube body 21 and the second tube body 23 can be maintained while maintaining the sealing property. Can be connected easily and surely. Further, in the above-described tube body connection structure, the wall thickness of the connecting member 25 is made sufficiently smaller than the wall thicknesses of the first tube body 21 and the second tube body 23, so that the annular groove 25a to the connecting member 25 is formed. , 25b is easily formed, and the annular grooves 25a, 25b of the connecting member 25 are
Annular recess 21 of the first tubular body 21 and the second tubular body 23
It is possible to firmly adhere to a and 23a.
【００２２】図２は、本発明の管体の接続構造の第２の
実施形態を示すもので、この実施形態では、第１の管体
２１および第２の管体２３の環状凹部２１ｂ，２３ｂ
が、軸長方向に対して傾斜して形成され、同時に、連結
部材２５の環状溝２５ｃ，２５ｄが、軸長方向に対して
傾斜して形成されている。第１の管体２１側の環状溝２
５ｃと第２の管体２３側の環状溝２５ｄは、八の字状に
逆方向に傾斜されている。FIG. 2 shows a second embodiment of the pipe connecting structure of the present invention. In this embodiment, the annular recesses 21b and 23b of the first pipe 21 and the second pipe 23 are formed.
Is formed so as to be inclined with respect to the axial direction, and at the same time, the annular grooves 25c and 25d of the connecting member 25 are formed so as to be inclined with respect to the axial direction. Annular groove 2 on the first pipe 21 side
5c and the annular groove 25d on the side of the second tubular body 23 are inclined in the opposite directions in an eight shape.
【００２３】なお、上述した部分を除いて第１の実施形
態と同様に構成されているため、同一部分には同一符号
を付して詳細な説明を省略する。この実施形態では、第
１の管体２１および第２の管体２３の環状凹部２１ｂ，
２３ｂ、および、連結部材２５の環状溝２５ｃ，２５ｄ
を、軸長方向に対して傾斜して形成したので、第１の管
体２１と第２の管体２３との相対的な回動を確実に阻止
することができる。Since the configuration is similar to that of the first embodiment except for the above-mentioned portions, the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. In this embodiment, the annular recesses 21b of the first tubular body 21 and the second tubular body 23,
23b and annular grooves 25c and 25d of the connecting member 25.
Is inclined with respect to the axial direction, the relative rotation of the first tube body 21 and the second tube body 23 can be reliably prevented.
【００２４】なお、この実施形態では、第１の管体２１
側の環状溝２５ｃと第２の管体２３側の環状溝２５ｄを
八の字状に逆方向に傾斜した例について述べたが、本発
明は、かかる実施形態に限定されるものではなく、例え
ば、平行になるように形成しても良い。また、以上述べ
た実施形態では、第１の管体２１、第２の管体２３およ
び連結部材２５をステンレス鋼により形成した例につい
て述べたが、本発明は、かかる実施形態に限定されるも
のではなく、銅等の金属であっても良い。In this embodiment, the first tubular body 21
The example in which the side annular groove 25c and the second annular body 25 side annular groove 25d are inclined in the opposite directions in the shape of an eight is described, but the present invention is not limited to such an embodiment, and for example, It may be formed so as to be parallel. Further, in the embodiment described above, the example in which the first pipe body 21, the second pipe body 23 and the connecting member 25 are made of stainless steel has been described, but the present invention is limited to such embodiment. Instead, it may be a metal such as copper.
【００２５】[0025]
【発明の効果】以上述べたように、請求項１の管体の接
続構造では、第１の管体および第２の管体内を、例え
ば、高温の排ガスが流通すると、連結部材の膨張が第１
の管体および第２の管体の膨張より小さくなり、第１の
管体および第２の管体の外周が、連結部材の内周に密着
するため、シール性を維持しながら第１の管体と第２の
管体とを容易，確実に接続することができる。As described above, in the pipe connecting structure according to the first aspect, when the high temperature exhaust gas flows through the first pipe and the second pipe, for example, the expansion of the connecting member increases. 1
The expansion of the first pipe and the second pipe is smaller than that of the first pipe and the outer periphery of the first pipe and the second pipe are in close contact with the inner periphery of the connecting member. The body and the second tubular body can be connected easily and reliably.
【００２６】請求項２の管体の接続構造では、第１の管
体および第２の管体の外側に嵌合される連結部材の環状
溝を、第１の管体および第２の管体の環状凹部に密着す
るようにしたので、シール性を維持しながら第１の管体
と第２の管体とを容易，確実に接続することができる。
請求項３の管体の接続構造では、第１の管体および第２
の管体内を、例えば、高温の排ガスが流通すると、連結
部材の膨張が第１の管体および第２の管体の膨張より小
さくなり、第１の管体および第２の管体の外周が、連結
部材の内周に密着し、また、第１の管体および第２の管
体の外側に嵌合される連結部材の環状溝が、第１の管体
および第２の管体の環状凹部に密着するため、シール性
を維持しながら第１の管体と第２の管体とをより確実に
接続することができる。According to a second aspect of the present invention, in the connecting structure of the pipes, the annular groove of the connecting member fitted to the outside of the first pipe and the second pipe is formed in the first pipe and the second pipe. Since the first tubular body and the second tubular body can be connected to each other easily and surely while maintaining the sealing property.
In the connection structure of the pipe body according to claim 3, the first pipe body and the second pipe body are provided.
When, for example, a high-temperature exhaust gas flows through the inside of the pipe body, the expansion of the connecting member becomes smaller than the expansion of the first pipe body and the second pipe body, and the outer peripheries of the first pipe body and the second pipe body are , The annular groove of the connecting member, which is in close contact with the inner circumference of the connecting member and which is fitted on the outside of the first pipe body and the second pipe body, has an annular shape of the first pipe body and the second pipe body. Since it closely adheres to the recess, it is possible to more reliably connect the first tube body and the second tube body while maintaining the sealing property.
【００２７】請求項４の管体の接続構造では、第１の管
体および第２の管体の環状凹部を、軸長方向に対して傾
斜して形成したので、連結部材の環状溝も軸長方向に対
して傾斜して形成され、これにより、第１の管体と第２
の管体との相対的な回動を確実に阻止することができ
る。In the connecting structure of the pipe body according to the fourth aspect, since the annular recesses of the first pipe body and the second pipe body are formed to be inclined with respect to the axial length direction, the annular groove of the connecting member is also axial. The first pipe body and the second pipe body are formed to be inclined with respect to the longitudinal direction.
It is possible to reliably prevent relative rotation with respect to the tubular body.
【図１】本発明の管体の接続構造の第１の実施形態を示
す縦断面図である。FIG. 1 is a vertical cross-sectional view showing a first embodiment of a connection structure for a tubular body of the present invention.
【図２】本発明の管体の接続構造の第２の実施形態を示
す縦断面図である。FIG. 2 is a vertical cross-sectional view showing a second embodiment of the tube body connection structure of the present invention.
【図３】従来の管体の接続構造を示す一部縦断面図であ
る。FIG. 3 is a partial vertical cross-sectional view showing a conventional connection structure for pipes.
【図４】図３の連結部材の嵌合前の状態を示す断面図で
ある。FIG. 4 is a cross-sectional view showing a state before fitting of the connecting member of FIG.
２１ 第１の管体 ２１ａ，２１ｂ，２３ａ，２３ｂ 環状凹部 ２３ 第２の管体 ２５ 連結部材 ２５ａ，２５ｂ，２５ｃ，２５ｄ 環状溝 21 1st tubular body 21a, 21b, 23a, 23b annular recessed part 23 2nd tubular body 25 connecting member 25a, 25b, 25c, 25d annular groove
Claims (4)
体とを相互に接続する管体の接続構造において、 前記第１の管体（２１）の端部および第２の管体（２
３）の端部を、筒状の金属製の連結部材（２５）の一側
および他側に嵌挿するとともに、前記連結部材（２５）
の熱膨張係数を、前記第１の管体（２１）および第２の
管体（２３）の熱膨張係数より小さくしてなることを特
徴とする管体の接続構造。1. A pipe connecting structure for connecting a first pipe (21) and a second pipe made of metal to each other, wherein an end portion of the first pipe (21) and a second pipe are provided. Tube (2
3) The end portion of 3) is fitted and inserted into one side and the other side of the tubular metal connecting member (25), and the connecting member (25) is also provided.
Is smaller than the thermal expansion coefficient of the first tubular body (21) and the second tubular body (23).
体（２３）とを相互に接続する管体の接続構造におい
て、 前記第１の管体（２１）の端部および第２の管体（２
３）の端部の外周に沿って内側に突出する環状凹部（２
１ａ，２１ｂ，２３ａ，２３ｂ）を形成するとともに、
前記第１の管体（２１）および第２の管体（２３）の端
部を、筒状の金属製の連結部材（２５）の一側および他
側に嵌挿し、前記連結部材（２５）の前記環状凹部（２
１ａ，２１ｂ，２３ａ，２３ｂ）に対応する位置に前記
環状凹部（２１ａ，２１ｂ，２３ａ，２３ｂ）に密着す
る環状溝（２５ａ，２５ｂ，２５ｃ，２５ｄ）を形成し
てなることを特徴とする管体の接続構造。2. A connecting structure for connecting a first tubular body (21) and a second tubular body (23) made of metal to each other, wherein an end portion of the first tubular body (21) is provided. And the second tube (2
3) An annular recess (2) protruding inward along the outer circumference of the end of
1a, 21b, 23a, 23b), and
The ends of the first pipe body (21) and the second pipe body (23) are fitted and inserted into one side and the other side of the tubular metal connecting member (25), and the connecting member (25). The annular recess (2
1a, 21b, 23a, 23b), a pipe characterized by forming an annular groove (25a, 25b, 25c, 25d) in close contact with the annular recess (21a, 21b, 23a, 23b). Body connection structure.
体（２３）とを相互に接続する管体の接続構造におい
て、 前記第１の管体（２１）の端部および第２の管体（２
３）の端部の外周に沿って内側に突出する環状凹部（２
１ａ，２１ｂ，２３ａ，２３ｂ）を形成するとともに、
前記第１の管体（２１）および第２の管体（２３）の端
部を、筒状の金属製の連結部材（２５）の一側および他
側に嵌挿し、前記連結部材（２５）の前記環状凹部（２
１ａ，２１ｂ，２３ａ，２３ｂ）に対応する位置に前記
環状凹部（２１ａ，２１ｂ，２３ａ，２３ｂ）に密着す
る環状溝（２５ａ，２５ｂ，２５ｃ，２５ｄ）を形成
し、前記連結部材（２５）の熱膨張係数を、前記第１の
管体（２１）および第２の管体（２３）の熱膨張係数よ
り小さくしてなることを特徴とする管体の接続構造。3. A pipe connecting structure for mutually connecting a first pipe (21) and a second pipe (23) made of metal, wherein an end portion of the first pipe (21) is provided. And the second tube (2
3) An annular recess (2) protruding inward along the outer circumference of the end of
1a, 21b, 23a, 23b), and
The ends of the first pipe body (21) and the second pipe body (23) are fitted and inserted into one side and the other side of the tubular metal connecting member (25), and the connecting member (25). The annular recess (2
1a, 21b, 23a, 23b) are formed with annular grooves (25a, 25b, 25c, 25d) that are in close contact with the annular recesses (21a, 21b, 23a, 23b), and the connecting member (25) is formed. A connecting structure for pipes, which has a coefficient of thermal expansion smaller than that of the first pipe (21) and the second pipe (23).
において、 前記第１の管体（２１）および第２の管体（２３）の環
状凹部（２１ｂ，２３ｂ）を、軸長方向に対して傾斜し
てなることを特徴とする管体の接続構造。4. The connecting structure for pipes according to claim 2, wherein the annular recesses (21b, 23b) of the first pipe (21) and the second pipe (23) are arranged in the axial direction. A connection structure for pipes, which is inclined with respect to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06452496A JP3732882B2 (en) | 1996-03-21 | 1996-03-21 | Tube connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06452496A JP3732882B2 (en) | 1996-03-21 | 1996-03-21 | Tube connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09257164A true JPH09257164A (en) | 1997-09-30 |
| JP3732882B2 JP3732882B2 (en) | 2006-01-11 |
Family
ID=13260702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06452496A Expired - Fee Related JP3732882B2 (en) | 1996-03-21 | 1996-03-21 | Tube connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3732882B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016042596A1 (en) * | 2014-09-16 | 2016-03-24 | 日新製鋼株式会社 | Metallic pipe joint structure and joining method |
| WO2019204951A1 (en) * | 2018-04-28 | 2019-10-31 | 浙江康帕斯流体输送技术有限公司 | Pipe connecting structure |
-
1996
- 1996-03-21 JP JP06452496A patent/JP3732882B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016042596A1 (en) * | 2014-09-16 | 2016-03-24 | 日新製鋼株式会社 | Metallic pipe joint structure and joining method |
| WO2019204951A1 (en) * | 2018-04-28 | 2019-10-31 | 浙江康帕斯流体输送技术有限公司 | Pipe connecting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3732882B2 (en) | 2006-01-11 |
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