JPS646465Y2

JPS646465Y2 -

Info

Publication number: JPS646465Y2
Application number: JP8330283U
Authority: JP
Priority date: 1983-05-31
Filing date: 1983-05-31
Publication date: 1989-02-20
Also published as: JPS59188384U

Description

【考案の詳細な説明】産業上の利用分野この考案は、応力集中を防止した多岐管の結合
構造に関するものである。[Detailed description of the invention] Industrial field of application This invention relates to a manifold joint structure that prevents stress concentration.

従来技術従来多岐管の結合構造は、第１図ａ，ｂ，ｃに
示すように、小径管１を束ね、端部のへり溶接３
および外周の軸方向溶接４を行ない、その後大径
管２に嵌入し、大径管端部２ａの円周に沿つて重
ね隅肉溶接５を行なつて結合した構造であつた。
この構造では、結合部の気密性を確保するため、
第１図ｃに示すように、小径管相互の軸方向溶接
端４ａと小径管端面１ａとの間に大径管端面２ａ
を位置させている。すなわち小径管端面１ａから
軸方向溶接端４ａまでの長さＬ１が、小径管端面
１ａから大径管端面２ａまでの長さＬ２より小さ
くならないようにして（Ｌ１≧Ｌ２）、重ね隅肉
溶接５を行なつている。しかしながら、このよう
な結合構造に、小径管相互を引き離すような力が
外部から加えられると、小径管相互の軸方向溶接
部４に荷重が集中し、第１図ｄに示すように亀裂
６を生ずることがあつた。Prior Art The conventional manifold joint structure is as shown in Figs. 1a, 1b, and 1c, in which small diameter pipes 1 are bundled and the ends are welded 3.
Then, axial welding 4 was performed on the outer periphery, and then the pipe was fitted into the large diameter pipe 2 and joined by lap fillet welding 5 along the circumference of the end 2a of the large diameter pipe.
In this structure, in order to ensure airtightness of the joints,
As shown in FIG. 1c, the end surface of the large diameter pipe 2a is welded between the axial weld end 4a of the small diameter pipe and the end surface of the small diameter pipe 1a.
In other words, the lap fillet weld 5 is performed so that the length L1 from the end face 1a of the small diameter pipe to the axial weld end 4a is not smaller than the length L2 from the end face 1a of the small diameter pipe to the end face 2a of the large diameter pipe (L1 ≥ L2). However, when an external force is applied to this joint structure to pull the small diameter pipes apart, the load is concentrated on the axial weld 4 between the small diameter pipes, which can cause a crack 6 as shown in Fig. 1d.

考案の目的この考案は、応力集中を防止して耐久性を向上
した多岐管の結合構造の提供を目的とする。Purpose of the invention The purpose of this invention is to provide a manifold joint structure that prevents stress concentration and improves durability.

考案の構成上記の目的を達成するため、この考案は複数本
の小径管の各端部を束ね、これを１本の大径管に
嵌入して接合した多岐管において、相互に溶接接
合された小径管を、それらの軸方向溶接長さより
深く大径管内に嵌入し、大径管と小径管の溶接
を、小径管端面と小径管相互の軸方向溶接端との
間の位置で行なうことによつて、溶接部の応力集
中を防止できる。Structure of the device In order to achieve the above object, this device is a manifold in which the ends of several small diameter pipes are bundled together and fitted into a single large diameter pipe to join them, in which the small diameter pipes that are welded together are fitted into the large diameter pipe deeper than their axial weld length, and the welding of the large diameter pipe and the small diameter pipe is performed at a position between the end face of the small diameter pipe and the axial weld ends of the small diameter pipes, thereby preventing stress concentration at the welded joint.

実施例以下実施例を示す図面に基づいて、この考案を
説明する。第２図以下はこの考案による多岐管の
結合構造を示し、複数本の小径管１を束ねて１本
の大径管２に接合している。小径管１の端部は、
へり溶接３および外周の軸方向溶接４を行ない、
この端部を大径管２内に嵌入し、小径管１と大径
管２を重ね溶接７で接合している。嵌入深さＬ３
は小径管１の軸方向溶接長さＬ１より大とし、小
径管１の端面１ａから重ね溶接７までの距離Ｌ２
は、軸方向溶接４の長さＬ１と同等もしくは小と
する。Embodiments This invention will be described below based on drawings showing embodiments. FIG. 2 and subsequent figures show a manifold coupling structure according to this invention, in which a plurality of small-diameter pipes 1 are bundled and joined to one large-diameter pipe 2. The end of the small diameter pipe 1 is
Perform edge welding 3 and axial welding 4 on the outer circumference,
This end portion is inserted into the large diameter pipe 2, and the small diameter pipe 1 and the large diameter pipe 2 are joined by overlap welding 7. Insertion depth L3
is larger than the axial weld length L1 of the small diameter pipe 1, and the distance L2 from the end surface 1a of the small diameter pipe 1 to the overlap weld 7
is equal to or smaller than the length L1 of the axial weld 4.

第３図および第４図ａ，ｂは、小径管１の別の
配列の実施例を示す。第４図ｂは、第４図ａのＡ
−Ａ線断面図で、Ｌ１，Ｌ２，Ｌ３の大小関係は
第２図と同様である。第５図は、大径管２の端部
２ａを補強した形状を示す。この端部２ａによつ
て、小径管１相互を引き離す方向に働く外力に対
してさらに強度を持たせることができる。 3 and 4a, b show embodiments of alternative arrangements of small diameter tubes 1. FIG. Figure 4b is A of Figure 4a.
In the sectional view taken along line -A, the size relationship of L1, L2, and L3 is the same as in FIG. 2. FIG. 5 shows a shape in which the end portion 2a of the large diameter pipe 2 is reinforced. This end portion 2a can provide further strength against external forces acting in the direction of separating the small diameter tubes 1 from each other.

上記のように構成された多岐管の結合構造にお
いて、振動等により小径管１相互を引き離す方向
に外力が働いたとき、大径管２の端部２ａがこの
荷重を負担し、小径管１の軸方向溶接部４に亀裂
を生ずるような応力集中を起させることがなく、
多岐管の耐久性を向上させることができる。また
従来の大径管２の端部２ａにおける隅肉溶接５で
は、溶接ワイヤのねらい位置の許容幅が狭く、溶
接形状や溶け込みに影響していたが、この考案の
重ね溶接７では、溶接ワイヤのねらい位置の許容
幅が緩和され、溶接作業が容易になり、従つて溶
接部の信頼性を向上させることができる。 In the manifold coupling structure configured as described above, when an external force acts in the direction of separating the small diameter pipes 1 due to vibration or the like, the end portion 2a of the large diameter pipe 2 bears this load, and the small diameter pipe 1 Stress concentration that would cause cracks in the axial welded portion 4 is not caused, and
The durability of the manifold can be improved. In addition, in the conventional fillet welding 5 at the end 2a of the large diameter pipe 2, the allowable width of the aiming position of the welding wire was narrow, which affected the weld shape and penetration, but in the lap welding 7 of this invention, the welding wire The permissible width of the target position is relaxed, the welding work becomes easier, and the reliability of the welded part can be improved.

考案の効果この考案は以上説明したように、多岐管の結合
構造において、小径管を引き離す方向の外力が加
わつたとき、溶接部の応力集中を防止することが
でき、従つて耐久性が向上する効果がある。ま
た、溶接ワイヤのねらい位置の許容幅が緩和され
て、溶接部の信頼性が向上する効果がある。Effects of the invention As explained above, this invention can prevent stress concentration at the welded part when an external force is applied in the direction of separating the small diameter pipes in the joint structure of the manifold pipes, thus improving durability. effective. Moreover, the permissible width of the target position of the welding wire is relaxed, which has the effect of improving the reliability of the welded part.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ａないしｄは従来の多岐管を示し、第１
図ａおよびｂは小径管の斜視図、第１図ｃおよび
ｄはそれぞれ多岐管の結合構造の縦断面図および
側面図である。第２図以下はこの考案の実施例を
示し、第２図ａは小径管の溶接部の斜視図、第２
図ｂは多岐管の結合構造の縦断面図、第３図およ
び第４図ａ，ｂは小径管の他の配列を示す断面
図、第５図は大径管の端部の実施例を示す縦断面
図である。１……小径管、２……大径管、４……軸方向溶
接、７……重ね溶接。 Figures 1a-d show conventional manifolds, with the first
Figures a and b are perspective views of a small diameter tube, and Figures 1c and d are a longitudinal cross-sectional view and a side view, respectively, of the manifold coupling structure. Figure 2 and subsequent figures show examples of this invention; Figure 2a is a perspective view of a welded part of a small diameter pipe;
Figure b is a longitudinal sectional view of the manifold coupling structure, Figures 3 and 4 a and b are sectional views showing other arrangements of small diameter pipes, and Figure 5 shows an embodiment of the end of a large diameter pipe. FIG. 1... Small diameter pipe, 2... Large diameter pipe, 4... Axial welding, 7... Lap welding.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

複数本の小径管を束ねて１本の大径管に接合し
た多岐管であつて、相互に溶接接合された小径管
を小径管相互の軸方向溶接長さより深く大径管内
に嵌入し、大径管と小径管との溶接を、小径管端
部と小径管相互の軸方向溶接端部との間の位置で
行なつたことを特徴とする多岐管の結合構造。 A manifold pipe in which multiple small-diameter pipes are bundled and joined to one large-diameter pipe, and the small-diameter pipes that are welded together are inserted into the large-diameter pipe deeper than the axial weld length of the small-diameter pipes, and the large-diameter pipe is A manifold pipe coupling structure characterized in that welding of a diameter pipe and a small diameter pipe is performed at a position between the end of the small diameter pipe and the mutually axial welded ends of the small diameter pipes.