JPS5915833Y2 - Sealed structure of fuel gas branch pipe - Google Patents
Sealed structure of fuel gas branch pipeInfo
- Publication number
- JPS5915833Y2 JPS5915833Y2 JP17062579U JP17062579U JPS5915833Y2 JP S5915833 Y2 JPS5915833 Y2 JP S5915833Y2 JP 17062579 U JP17062579 U JP 17062579U JP 17062579 U JP17062579 U JP 17062579U JP S5915833 Y2 JPS5915833 Y2 JP S5915833Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- wall
- branch pipe
- small curvature
- fuel gas
- 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.)
- Expired
Links
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Description
【考案の詳細な説明】
本考案は、燃料ガス配管において、元コックとバーナー
コックとの間に使用される分岐管の密封構造に関し、溶
接、シール材を一切用いることなしに極めて安価な構造
で密封を可能としたものである。[Detailed description of the invention] This invention relates to a sealing structure for a branch pipe used between a main cock and a burner cock in fuel gas piping, and is an extremely inexpensive structure that does not require any welding or sealing material. This allows for sealing.
以下に本考案を図面の実施例により説明すると、管長さ
方向に間隔をおいてガス元管ＧとガスバーナーＦとがそ
れぞれ接続されかつ管両端部が密封される金属円管製燃
料ガス分岐管りにおいて、前記両端部に、同肉厚壁ａ、
ａが二重に重なった管扁平部Ｅを形成し、該扁平部
においてその中央にＶ字部１をかつＶ字部の両側にへ字
部２゜２を塑性加工で形成し、これらＶ字部１及びへ字
部２，２は曲げの中立線より内側に位置する大曲率壁す
を肉厚にまた曲げの中立線より外側に位置する小曲率壁
Ｃを肉薄に形威し、延びが大なる小曲率壁Ｃの塑性加工
後の戻り現象を利用して大曲率壁す、Ｃを密着させた分
岐管の密封構造に係るものである。The present invention will be explained below with reference to the embodiments shown in the drawings. A fuel gas branch pipe made of a circular metal pipe, in which a gas source pipe G and a gas burner F are connected to each other at intervals in the pipe length direction, and both ends of the pipe are sealed. In this case, the same thick walls a,
Form a tube flat part E in which the tube a is overlapped twice, and form a V-shaped part 1 in the center of the flat part and F-shaped parts 2°2 on both sides of the V-shaped part by plastic working, and form these V-shaped parts. The part 1 and the curved parts 2 and 2 have a thick wall with a large curvature located inside the neutral line of bending and a thin wall C with a small curvature located outside the neutral line of bending. This relates to a sealing structure of a branch pipe in which a large curvature wall C is brought into close contact with a large curvature wall C by utilizing the return phenomenon of the small curvature wall C after plastic working.
なお、図中３は元コックまでの元管Ｇと分岐管りとを接
続するねし孔、４，４はガスバーナーＦ。In addition, in the figure, 3 is a screw hole connecting the main pipe G up to the main cock and the branch pipe, and 4, 4 is a gas burner F.
Ｆの開閉コックＨ，Ｈを接続するねし孔である。This is a tapped hole that connects the opening/closing cocks H and H of F.
また第３図により前記Ｖ字部１、へ字部２の加工方法を
説明すると、へ字部２，２の曲げの中立線の新曲点間の
巾ＪとＶ字部１より相当大の深さＫとを有する凹部り及
びこれに連なる平坦面Ｍを設けたプレス下型Ｎと、■字
部１の大曲率壁すの内面に一致した昇降可能な突部Ｐを
設けかつ両側に固定平坦面Ｑを設けたプレス上型Ｒとを
用意し、下型Ｎの平坦面Ｍに分岐管りの管扁平部Ｅを重
ねてセットし、次いで上型Ｒを下降させて、まず平坦面
Ｑで僅かの滑りしか許さないように固定し、突部Ｐを下
げて第３図の如く塑性加工する。Further, to explain the processing method of the V-shaped portion 1 and the V-shaped portion 2 with reference to FIG. A press lower mold N is provided with a concave portion having a diameter K and a flat surface M connected thereto, and a protrusion P that can be raised and lowered in accordance with the inner surface of the large curvature wall of the character part 1 is provided, and a fixed flat surface is provided on both sides. Prepare a press upper mold R with a surface Q, set the pipe flat part E of the branch pipe over the flat surface M of the lower mold N, and then lower the upper mold R and press the flat surface Q first. It is fixed so that only slight slippage is allowed, the protrusion P is lowered, and plastic working is performed as shown in Fig. 3.
すると、■、へ字部の大曲率壁すの内面はそれぞれプレ
ス上、下型Ｒ，Ｎで規制されているが、小曲率壁Ｃの外
面は全く自由であるから、■、へ字部１，２は、上下型
が互に沿った形状の通常の間型によるときのように全体
に均一な厚さになることはなく、塑性加工上、大曲率壁
ｂ、曲げの中立線より内側で材料は余る側であるため圧
縮されて、大曲率壁すは肉厚に形成される。Then, ■, the inner surface of the large curvature wall C of the F-shaped part is regulated by the upper and lower press molds R and N, respectively, but the outer surface of the small curvature wall C is completely free, so that ■, the F-shaped part 1 , 2 does not have a uniform thickness throughout, unlike when using a normal intermediate mold in which the upper and lower molds are aligned with each other. Since the material is on the surplus side, it is compressed and the large curvature wall is formed thick.
また小曲率壁Ｃは、曲げの中立線より外側で材料は足り
ない側であるため延びて、小曲率壁Ｃは肉薄に形成され
る。Further, the small curvature wall C is extended because it is outside the neutral line of bending and there is insufficient material, and the small curvature wall C is formed thin.
そして、大、小曲率壁す、 ｃは、塑性加工後に僅か
の弾性により戻り現象を起す。The large and small curvature walls (c) undergo a return phenomenon due to slight elasticity after plastic working.
即ち、変形量の小さい大曲率壁すが曲げを延ばそうとす
る量より、変形量の大きい小曲率壁Ｃが曲げを延ばそう
とする量のほうが大きく、小曲率壁Ｃの戻り現象が大き
いので、■、へ字部１． ２． ２の小曲率壁Ｃは大曲
率壁すに密着し、しかもこの密着部が三個所であるから
ガス洩れの危険はなくなる。In other words, the amount by which the small curvature wall C, which has a large amount of deformation, attempts to extend the bending is greater than the amount by which the large curvature wall, which has a small amount of deformation, attempts to extend the bending, and the return phenomenon of the small curvature wall C is large. , F-shaped part 1. 2. The small curvature wall C of No. 2 is in close contact with the large curvature wall, and since there are three places where the small curvature wall C is in close contact with the large curvature wall, there is no risk of gas leakage.
なお、本実施例の分岐管の効果確認試験（漏洩試験）に
ついては、下記の通りである。The effect confirmation test (leakage test) of the branch pipe of this example is as follows.
漏洩試験器は差圧試験器（中京電機株式会社製）を使用
した。A differential pressure tester (manufactured by Chukyo Denki Co., Ltd.) was used as the leakage tester.
なお試験器は、０．０８６ （ｃｃ ａｔｍ／ｍｉｎ
、ｌを越えたとき不良ランプ表示するように設定した。The tester is 0.086 (cc atm/min
, I set it to display a defective lamp when it exceeds l.
被試験物としての分岐管は、材質が圧力配管用鋼管（Ｊ
ＩＳ ： ５ＴＰＧ）、外径は１７．３ｍｍ、内径は１
２゜７ｍｍのものの端部をプレス圧３５〜４０ ｔでプ
レスして、プレス後の二重板厚（第３図中の壁ａ十壁ａ
の厚さ）を４．２ｍｍとしたものを使用し、総数５００
本について検査した。The material of the branch pipe as the test object is steel pipe for pressure piping (J
IS: 5TPG), outer diameter is 17.3mm, inner diameter is 1
Press the end of the 2.7 mm piece with a press pressure of 35 to 40 t to obtain a double plate thickness after pressing (wall a x wall a in Figure 3).
A total of 500 pieces were used, with a thickness of 4.2 mm.
I inspected the book.
その結果、不良率は０．２％であった。As a result, the defect rate was 0.2%.
以上の説明から明らかな通り、本考案は、ガス分岐管の
同肉厚壁が二重に重なった管杭平部に、■宇部及びその
両側のへ宇部を形成し、これら三個新都でその小曲率壁
の塑性加工後の戻り現象を利用して大、小曲率壁を互に
密着させた密封構造であるから、本考案においては、ガ
ス供給圧がそのまま分岐管に作用してもガス洩れの危険
がないところの簡単安価な構造を提供できる。As is clear from the above explanation, the present invention forms a ■ Ube and a Ube on both sides of the pipe pile in the flat part of the pipe pile where the same thick walls of the gas branch pipe overlap. Since the sealing structure uses the return phenomenon of the small curvature wall after plastic working to bring the large and small curvature walls into close contact with each other, in this invention, even if the gas supply pressure acts on the branch pipe as it is, the gas A simple and inexpensive structure with no risk of leakage can be provided.
第１図は本考案実施例の底面図、第２図は同側面図、第
３図は加工方法説明用一部切欠側面図である。
１：Ｖ字部、２：へ字部、ａ：同肉厚壁、ｂ：大曲率壁
、Ｃ：小曲率壁、Ｄ：分岐管、Ｅ：管杭平部、Ｆ：ガス
バーナー、Ｇ：元管、Ｈ：開閉コック、Ｎニブレス下型
、Ｒ：同上型。FIG. 1 is a bottom view of an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a partially cutaway side view for explaining the processing method. 1: V-shaped part, 2: F-shaped part, a: same thick wall, b: large curvature wall, C: small curvature wall, D: branch pipe, E: pipe pile flat part, F: gas burner, G: Main pipe, H: opening/closing cock, N nibbles lower type, R: same type as above.
Claims (1)
とがそれぞれ接続されかつ管両端部が密封される金属円
管製燃料ガス分岐管りにおいて、前記両端部に、同肉厚
壁ａ、 ａが二重に重なった管扁平部Ｅを形成し、該
扁平部においてその中央にＶ字部１をかつＶ字部の両側
にへ字部２゜２を塑性加工で形成し、これらＶ字部１及
び入字部２，２は、曲げの中立線より内側に位置する大
曲率壁すを肉厚にまた曲げの中立線より外側に位置する
小曲率壁Ｃを肉薄に形成し、延びが大なる小曲率壁Ｃの
塑性加工後の戻り現象を利用して大小曲率壁す、Ｃを密
着させたことを特徴とする燃料ガス分岐管の密封構造。Gas main pipe G and gas burner F at intervals in the pipe length direction
In a fuel gas branch pipe made of a circular metal pipe, in which the pipes are connected to each other and both ends of the pipe are sealed, a flat pipe part E is formed at both ends of the pipe, in which the same thick walls a and a double overlap, A V-shaped part 1 is formed in the center of the flat part, and F-shaped parts 2°2 are formed on both sides of the V-shaped part by plastic working, and these V-shaped parts 1 and inset parts 2, 2 are located at the neutral line of bending. The large curvature wall C located on the inner side is formed to be thick, and the small curvature wall C located outside the neutral line of bending is formed thin, and the return phenomenon after plastic working of the small curvature wall C, which has a large elongation, is utilized. A sealed structure for a fuel gas branch pipe, characterized in that a large and small curvature wall (C) is brought into close contact with the wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17062579U JPS5915833Y2 (en) | 1979-12-10 | 1979-12-10 | Sealed structure of fuel gas branch pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17062579U JPS5915833Y2 (en) | 1979-12-10 | 1979-12-10 | Sealed structure of fuel gas branch pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5687691U JPS5687691U (en) | 1981-07-14 |
| JPS5915833Y2 true JPS5915833Y2 (en) | 1984-05-10 |
Family
ID=29681461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17062579U Expired JPS5915833Y2 (en) | 1979-12-10 | 1979-12-10 | Sealed structure of fuel gas branch pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5915833Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2858394B2 (en) * | 1994-11-10 | 1999-02-17 | ショーボンド建設株式会社 | Branch pipe fitting |
-
1979
- 1979-12-10 JP JP17062579U patent/JPS5915833Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5687691U (en) | 1981-07-14 |
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