JP4588932B2 - Connection structure between resin pipe and tank - Google Patents

Connection structure between resin pipe and tank Download PDF

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Publication number
JP4588932B2
JP4588932B2 JP2001209899A JP2001209899A JP4588932B2 JP 4588932 B2 JP4588932 B2 JP 4588932B2 JP 2001209899 A JP2001209899 A JP 2001209899A JP 2001209899 A JP2001209899 A JP 2001209899A JP 4588932 B2 JP4588932 B2 JP 4588932B2
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Japan
Prior art keywords
tank
resin pipe
connection
pipe
cup
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Expired - Fee Related
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JP2001209899A
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JP2003021290A (en
Inventor
多加司 伊神
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T.RAD CO., L T D.
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T.RAD CO., L T D.
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines

Description

【０００１】
【発明の属する技術分野】
本発明は、熱交換器の金属製タンクに樹脂製パイプを接続する接続構造に関する。
【０００２】
【従来の技術】
金属製タンクと樹脂製パイプとの接続構造は、樹脂製タンクとチューブプレートとの接続構造を利用することができる。図６はその例で、タンク１のパイプ取付口1aに段付カラー状の接続用カップ２の先端部を嵌入して、タンク１，接続用カップ２間をろう付け固定する。接続用カップ２の外周には予めスリットを形成しておき、そのスリットより後端側にカシメ部７を設けておく。
次に、樹脂製パイプ４はその先端部外周に外フランジ部３を有すると共に、その外フランジ部３よりもさらに先端に環状溝11を形成しておく。そしてその環状溝11にシール用のＯリング９を嵌着し、樹脂製パイプ４の先端部を接続用カップ２に嵌入する。そしてカシメ部７を塑性変形することにより、樹脂製パイプ４を接続用カップ２に固定するものである。
【０００３】
【発明が解決しようとする課題】
このように樹脂製パイプ４に多用されている環状溝11を形成するには、図７の如く、射出成形の金型において樹脂製パイプ４の先端部を半径方向に分割する第１の金型12と第２の金型13を設ける必要がある。すると、その環状溝11にはパーティングライン15が形成される。そのためそこにＯリング９を被嵌しても、パーティングライン15の僅かの凸部によって気密性を失われるおそれがある。
そこで本発明は、係る問題点を解決することを課題とする。
【０００４】
【課題を解決するための手段】
請求項１に記載の本発明は、円形なパイプ取付口(1a)を有するタンク(1) と、
そのパイプ取付口(1a)に液密に接続固定されるリング状の接続用カップ(2) と、
その接続用カップ(2) に先端部が嵌入し、その先端部外周に突設された外フランジ部(3) で、前記接続用カップ(2) にカシメ固定される樹脂製パイプ(4) と、を有する樹脂製パイプとタンクとの接続構造において、
前記接続用カップ(2) は、前記タンク(1) のパイプ取付口(1a)に一端部外周が整合するタンク嵌入部(5a)を有すると共に、他端部に段付部(6a)を介して拡径された拡径部(6) を有し、その拡径部(6) の縁部にカシメ部(7) が形成され且つ、
その拡径部(6) の周方向に互いに離間して複数の回り止め用欠切部(8a)が設けられ、
前記樹脂製パイプ(4) は、前記外フランジ部(3) の先端部に前記タンク嵌入部(5a)内に整合する嵌着部(5) を有し、その外フランジ部(3) の外周に互いに周方向に離間して複数の逆Ｌ字状部(8) が突設され、夫々の逆Ｌ字状部(8) の付根部が前記接続用カップ(2) の夫々の前記回り止め用欠切部(8a)に整合され、
その外フランジ部(3) と、前記接続用カップ(2) の前記段付部(6a)との間にシール用のＯリング(9) が保持されるＯリング保持部(10)を有し、
前記樹脂製パイプ(4) が金型を用いた射出成形体よりなり、その嵌着部(5) の外周には環状溝が設けられていないことを特徴とする樹脂製パイプとタンクとの接続構造である。
【０００５】
【発明の実施の形態】
次に、図面に基づいて本発明の実施の形態につき説明する。
図１は本発明の樹脂製パイプとアルミニューム製タンクとの接続構造の分解斜視図であり、図２はその取付け状態を示す平面図、図３は同要部斜視図、図４は同縦断面図、図５は樹脂製パイプ４の正面図である。
この樹脂製パイプとタンクとの接続構造は、パイプ取付口1aを有するタンク１とそのパイプ取付口1aにろう付け等の手段で液密に固定される接続用カップ２と、その接続用カップ２にＯリング９を介して先端部が嵌着され、接続用カップ２のカシメ部７によってカシメ固定される樹脂製パイプ４とを有する。
【０００６】
接続用カップ２は、その先端部外周がパイプ取付口1aに整合する嵌着部５を有し、他端部に段付部6aを介して拡径された拡径部６を有する。そして拡径部６の縁部に平行にスリット7aが形成され、そのスリット7aの他端側にカシメ部７が設けられている。さらに拡径部６には、その周方向に互いに離間して等間隔に複数の回り止め用欠切部8aが設けられている。
次に、樹脂製パイプ４はその先端部外周に外フランジ部３が設けられ、その外フランジ部３の外周に互いに離間して複数の逆Ｌ字状部８が等間隔に一体に突設されている。その逆Ｌ字状部８の付根部が、接続用カップ２の回り止め用欠切部8aに整合される。そして逆Ｌ字状部８の先端がタンク１の外面に着座する。また、この逆Ｌ字状部８の付根部と段付部6aとの間にＯリング保持部10が形成され、そのＯリング保持部10にシール用のＯリング９が嵌着される。
【０００７】
このようにしてなる樹脂製パイプとタンクとの接続構造は、次のように組立てられる。先ず、接続用カップ２の嵌入部5aがタンク１のパイプ取付口1aに嵌着され、その段付部6aの外面がパイプ取付口1aの孔縁部に着座される。係る状態で、両者間が一体にろう付けされる。
なお、このとき同時にタンク１と図４に示すチューブプレート16並びにチューブプレート16のチューブ挿通孔に嵌着されたチューブ17さらに各チューブ17間に介装される図示しないコルゲートフィンが一体にろう付けされる。
次いで、樹脂製パイプ４の嵌着部５の外周にＯリング９が嵌着され、その嵌着部５が接続用カップ２の嵌入部5a内に挿入される。このとき、逆Ｌ字状部８は図３の如く回り止め用欠切部8aにその付根部が嵌着する。次いで、カシメ部７が半径方向中心側に塑性変形され、その縁部が外フランジ部３の外面を圧接して接続構造を完成する。
【０００８】
【発明の作用・効果】
本発明の樹脂製パイプとタンクとの接続構造は、接続用カップ２の回り止め用欠切部8aに樹脂製パイプ４の逆Ｌ字状部８の付根部が嵌着され、その付根部と接続用カップ２の段付部6aとの間にＯリング９が保持されるＯリング保持部10を有し、前記樹脂製パイプ４の嵌着部５の外周には環状溝が設けられていないことを特徴とするから、射出成形体よりなる樹脂製パイプ４を確実に回り止め保持すると共に、嵌着部５に環状溝を設けなくてもＯリング９を軸線方向の特定位置に位置決めし、シール性を保持できる。それにより、従来の環状溝を設けた場合に樹脂製パイプ４のその溝内に生じるパーティングラインの発生を防止し、信頼性の高いシール構造を提供できる。
【図面の簡単な説明】
【図１】本発明の樹脂製パイプとタンクとの接続構造の分解斜視図。
【図２】同接続構造の組立状態を示す要部平面図。
【図３】同接続構造の要部斜視図。
【図４】同接続構造の縦断面図。
【図５】同接続構造に用いられる樹脂製パイプ４の正面図。
【図６】従来型接続構造の縦断面図。
【図７】同接続構造に用いられた樹脂製パイプ４の射出成形用金型の説明図。
【符号の説明】
１ タンク
1a パイプ取付口
２ 接続用カップ
３ 外フランジ部
４ 樹脂製パイプ
５ 嵌着部
5a 嵌入部
６ 拡径部
6a 段付部
７ カシメ部
7a スリット
８ 逆Ｌ字状部
8a 回り止め用欠切部
９ Ｏリング
10 Ｏリング保持部
11 環状溝
12，13，14 金型
15 パーティングライン
16 チューブプレート
17 チューブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure for connecting a resin pipe to a metal tank of a heat exchanger.
[0002]
[Prior art]
As a connection structure between the metal tank and the resin pipe, a connection structure between the resin tank and the tube plate can be used. FIG. 6 shows an example in which the tip end portion of the stepped collar-shaped connecting cup 2 is inserted into the pipe mounting opening 1a of the tank 1, and the tank 1 and the connecting cup 2 are brazed and fixed. A slit is formed in advance on the outer periphery of the connection cup 2, and a crimping portion 7 is provided on the rear end side from the slit.
Next, the resin pipe 4 has an outer flange portion 3 on the outer periphery of the distal end portion, and an annular groove 11 is further formed at the distal end than the outer flange portion 3. Then, an O-ring 9 for sealing is fitted into the annular groove 11, and the tip of the resin pipe 4 is fitted into the connection cup 2. The caulking portion 7 is plastically deformed to fix the resin pipe 4 to the connection cup 2.
[0003]
[Problems to be solved by the invention]
In order to form the annular groove 11 frequently used in the resin pipe 4 as described above, as shown in FIG. 7, in the injection mold, the first mold for dividing the tip of the resin pipe 4 in the radial direction is used. 12 and a second mold 13 need to be provided. Then, the parting line 15 is formed in the annular groove 11. Therefore, even if the O-ring 9 is fitted there, the airtightness may be lost due to a slight convex portion of the parting line 15.
Then, this invention makes it a subject to solve the problem which concerns.
[0004]
[Means for Solving the Problems]
The present invention as set forth in claim 1 includes a tank (1) having a circular pipe attachment opening (1a),
A ring-shaped connection cup (2) that is liquid-tightly connected and fixed to the pipe mounting opening (1a);
A resin pipe (4) that is fitted to the connection cup (2) by an outer flange portion (3) that is fitted into the connection cup (2) and protrudes from the outer periphery of the tip. In the connection structure between the resin pipe having the tank and the tank,
The connection cup (2) has a tank insertion part (5a) whose outer periphery is aligned with the pipe attachment port (1a) of the tank (1) and a stepped part (6a) at the other end. And the crimped portion (7) is formed at the edge of the expanded diameter portion (6), and
A plurality of non-rotating notch portions (8a) are provided apart from each other in the circumferential direction of the enlarged diameter portion (6),
The resin pipe (4) has a fitting portion (5) aligned with the inside of the tank fitting portion (5a) at the tip of the outer flange portion (3), and an outer periphery of the outer flange portion (3). A plurality of inverted L-shaped portions (8) projectingly spaced apart from each other in the circumferential direction, and a root portion of each inverted L-shaped portion (8) serves as a detent for each of the connection cups (2). Aligned with the notch (8a)
Between the outer flange portion (3) and the stepped portion (6a) of the connecting cup (2), there is an O-ring holding portion (10) for holding a sealing O-ring (9). ,
The resin pipe (4) is made of an injection-molded body using a mold, and an annular groove is not provided on the outer periphery of the fitting portion (5). Structure.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a connecting structure between a resin pipe and an aluminum tank according to the present invention, FIG. 2 is a plan view showing the mounting state, FIG. 3 is a perspective view of the main part, and FIG. FIG. 5 is a front view of the resin pipe 4.
The connection structure between the resin pipe and the tank includes a tank 1 having a pipe attachment port 1a, a connection cup 2 that is liquid-tightly fixed to the pipe attachment port 1a by means such as brazing, and the connection cup 2 And a resin pipe 4 which is fitted with a crimping portion 7 of the connection cup 2 and has a distal end portion fitted through an O-ring 9.
[0006]
The connection cup 2 has a fitting portion 5 whose outer periphery is aligned with the pipe attachment opening 1a, and has a diameter-expanded portion 6 that is expanded at the other end via a stepped portion 6a. A slit 7a is formed in parallel with the edge of the enlarged diameter portion 6, and a crimping portion 7 is provided on the other end side of the slit 7a. Further, the enlarged diameter portion 6 is provided with a plurality of non-rotating notch portions 8a spaced apart from each other in the circumferential direction at equal intervals.
Next, the resin pipe 4 is provided with an outer flange portion 3 on the outer periphery of the distal end portion thereof, and a plurality of inverted L-shaped portions 8 are integrally projected at equal intervals on the outer periphery of the outer flange portion 3 so as to be separated from each other. ing. The base portion of the inverted L-shaped portion 8 is aligned with the notch portion 8 a for preventing rotation of the connection cup 2. The tip of the inverted L-shaped portion 8 is seated on the outer surface of the tank 1. Further, an O-ring holding portion 10 is formed between the root portion of the inverted L-shaped portion 8 and the stepped portion 6a, and a sealing O-ring 9 is fitted into the O-ring holding portion 10.
[0007]
The connection structure between the resin pipe and the tank thus constructed is assembled as follows. First, the fitting portion 5a of the connection cup 2 is fitted into the pipe mounting port 1a of the tank 1, and the outer surface of the stepped portion 6a is seated on the hole edge of the pipe mounting port 1a. In this state, the two are brazed together.
At the same time, the tank 1 and the tube plate 16 shown in FIG. 4 and the tube 17 fitted in the tube insertion hole of the tube plate 16 and a corrugated fin (not shown) interposed between the tubes 17 are brazed together. The
Next, an O-ring 9 is fitted on the outer periphery of the fitting portion 5 of the resin pipe 4, and the fitting portion 5 is inserted into the fitting portion 5 a of the connection cup 2. At this time, the base portion of the inverted L-shaped portion 8 is fitted into the notch portion 8a for rotation prevention as shown in FIG. Next, the caulking portion 7 is plastically deformed toward the center in the radial direction, and the edge portion presses the outer surface of the outer flange portion 3 to complete the connection structure.
[0008]
[Operation and effect of the invention]
In the connecting structure between the resin pipe and the tank of the present invention, the root portion of the inverted L-shaped portion 8 of the resin pipe 4 is fitted in the notch portion 8a for preventing rotation of the connection cup 2, and the root portion An O-ring holding part 10 for holding an O-ring 9 is provided between the stepped part 6a of the connection cup 2 and no annular groove is provided on the outer periphery of the fitting part 5 of the resin pipe 4. Therefore, the resin pipe 4 made of an injection-molded body is reliably prevented from rotating, and the O-ring 9 is positioned at a specific position in the axial direction without providing the annular groove in the fitting portion 5. Maintains sealing performance. Thereby, when a conventional annular groove is provided, the generation of a parting line generated in the groove of the resin pipe 4 can be prevented, and a highly reliable seal structure can be provided.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a connection structure between a resin pipe and a tank according to the present invention.
FIG. 2 is an essential part plan view showing an assembled state of the connection structure.
FIG. 3 is a perspective view of a main part of the connection structure.
FIG. 4 is a longitudinal sectional view of the connection structure.
FIG. 5 is a front view of a resin pipe 4 used in the connection structure.
FIG. 6 is a longitudinal sectional view of a conventional connection structure.
FIG. 7 is an explanatory view of an injection mold for the resin pipe 4 used in the connection structure.
[Explanation of symbols]
1 tank
1a Pipe mounting port 2 Connection cup 3 Outer flange part 4 Plastic pipe 5 Fitting part
5a Insertion part 6 Expanded part
6a Stepped part 7 Caulking part
7a Slit 8 Reverse L-shaped part
8a Non-rotating notch 9 O-ring
10 O-ring holder
11 Annular groove
12, 13, 14 Mold
15 Parting line
16 Tube plate
17 tubes

Claims (1)

円形なパイプ取付口(1a)を有するタンク(1) と、
そのパイプ取付口(1a)に液密に接続固定されるリング状の接続用カップ(2) と、
その接続用カップ(2) に先端部が嵌入し、その先端部外周に突設された外フランジ部(3) で、前記接続用カップ(2) にカシメ固定される樹脂製パイプ(4) と、を有する樹脂製パイプとタンクとの接続構造において、
前記接続用カップ(2) は、前記タンク(1) のパイプ取付口(1a)に一端部外周が整合するタンク嵌入部(5a)を有すると共に、他端部に段付部(6a)を介して拡径された拡径部(6) を有し、その拡径部(6) の縁部にカシメ部(7) が形成され且つ、
その拡径部(6) の周方向に互いに離間して複数の回り止め用欠切部(8a)が設けられ、
前記樹脂製パイプ(4) は、前記外フランジ部(3) の先端部に前記タンク嵌入部(5a)内に整合する嵌着部(5) を有し、その外フランジ部(3) の外周に互いに周方向に離間して複数の逆Ｌ字状部(8) が突設され、夫々の逆Ｌ字状部(8) の付根部が前記接続用カップ(2) の夫々の前記回り止め用欠切部(8a)に整合され、
その外フランジ部(3) と、前記接続用カップ(2) の前記段付部(6a)との間にシール用のＯリング(9) が保持されるＯリング保持部(10)を有し、
前記樹脂製パイプ(4) が金型を用いた射出成形体よりなり、その嵌着部(5) の外周には環状溝が設けられていないことを特徴とする樹脂製パイプとタンクとの接続構造。A tank (1) having a circular pipe fitting (1a);
A ring-shaped connection cup (2) that is liquid-tightly connected and fixed to the pipe mounting opening (1a);
A resin pipe (4) that is fitted to the connection cup (2) by an outer flange portion (3) that is fitted into the connection cup (2) and protrudes from the outer periphery of the tip. In the connection structure between the resin pipe having the tank and the tank,
The connection cup (2) has a tank insertion part (5a) whose outer periphery is aligned with the pipe attachment port (1a) of the tank (1) and a stepped part (6a) at the other end. And the crimped portion (7) is formed at the edge of the expanded diameter portion (6), and
A plurality of non-rotating notch portions (8a) are provided apart from each other in the circumferential direction of the enlarged diameter portion (6),
The resin pipe (4) has a fitting portion (5) aligned with the inside of the tank fitting portion (5a) at the tip of the outer flange portion (3), and an outer periphery of the outer flange portion (3). A plurality of inverted L-shaped portions (8) projectingly spaced apart from each other in the circumferential direction, and a root portion of each inverted L-shaped portion (8) serves as a detent for each of the connection cups (2). Aligned with the notch (8a)
Between the outer flange portion (3) and the stepped portion (6a) of the connecting cup (2), there is an O-ring holding portion (10) for holding a sealing O-ring (9). ,
The resin pipe (4) is made of an injection-molded body using a mold, and an annular groove is not provided on the outer periphery of the fitting portion (5). Construction.
JP2001209899A 2001-07-10 2001-07-10 Connection structure between resin pipe and tank Expired - Fee Related JP4588932B2 (en)

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JP2001209899A JP4588932B2 (en) 2001-07-10 2001-07-10 Connection structure between resin pipe and tank

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JP4588932B2 true JP4588932B2 (en) 2010-12-01

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN101858470A (en) * 2010-06-12 2010-10-13 海洋王照明科技股份有限公司 Through pipe connection structure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6055638B2 (en) * 2012-09-24 2016-12-27 テイ・エス テック株式会社 Attachment structure of seat connecting member and attachment member, and seat structure
KR102081641B1 (en) * 2019-10-17 2020-02-26 허철 Angle Valve and Manufacturing Method of it

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JPH08159688A (en) * 1994-12-01 1996-06-21 Zexel Corp Port pipe mount structure to heat exchanger tank
JPH09257166A (en) * 1996-03-21 1997-09-30 Calsonic Corp Pipe connecting structure
JPH11236985A (en) * 1998-02-23 1999-08-31 Denso Corp Connecting structure for pipe
JP2001280558A (en) * 2000-03-30 2001-10-10 Calsonic Kansei Corp Joint device for piping

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JPH08159688A (en) * 1994-12-01 1996-06-21 Zexel Corp Port pipe mount structure to heat exchanger tank
JPH09257166A (en) * 1996-03-21 1997-09-30 Calsonic Corp Pipe connecting structure
JPH11236985A (en) * 1998-02-23 1999-08-31 Denso Corp Connecting structure for pipe
JP2001280558A (en) * 2000-03-30 2001-10-10 Calsonic Kansei Corp Joint device for piping

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858470A (en) * 2010-06-12 2010-10-13 海洋王照明科技股份有限公司 Through pipe connection structure

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