JPH0582518B2 - - Google Patents
Info
- Publication number
- JPH0582518B2 JPH0582518B2 JP60181620A JP18162085A JPH0582518B2 JP H0582518 B2 JPH0582518 B2 JP H0582518B2 JP 60181620 A JP60181620 A JP 60181620A JP 18162085 A JP18162085 A JP 18162085A JP H0582518 B2 JPH0582518 B2 JP H0582518B2
- Authority
- JP
- Japan
- Prior art keywords
- spherical joint
- inner diameter
- main pipe
- present
- flow
- 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 - Lifetime
Links
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は火力プラントの主蒸気、再熱蒸気配管
系の継手に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint for a main steam and reheat steam piping system of a thermal power plant.
（従来の技術）
第４図は１本の母管１に２本の枝管２，２が合
流、若しくは岐出されるように構成された従来の
Ｙ型継手を示し、流動抵抗は小さいが肉厚が厚
く、また形状が不均一なために熱疲労に対する寿
命消費が大きいという欠点があつた。(Prior art) Fig. 4 shows a conventional Y-shaped joint configured such that two branch pipes 2, 2 join or branch out to one main pipe 1, and although the flow resistance is small, the Due to the large thickness and non-uniform shape, there was a drawback that the life consumption due to thermal fatigue was large.
このため第５図に示すように、球型継手本体３
に１本の母管４と２本の枝管５，５を接続して構
成された、Ｙ型継手と比して形状が均一で肉厚が
薄く、熱疲労等に対する寿命消費の小さい球型継
手が使用されている。 Therefore, as shown in FIG.
A spherical joint with a uniform shape, thinner wall thickness, and less life consumption due to thermal fatigue, etc., compared to a Y-type joint, which is constructed by connecting one main pipe 4 and two branch pipes 5, 5. fittings are used.
（発明が解決しようとする問題点）
しかしながら前記従来の球型継手は、球型継手
本体の内径と配管の寸法との間に特別の配慮が払
われておらず、球型継手本体３の内径Ｄを母管４
の内径ｄに比較してＤ／ｄ＞1.7の大きなサイズ
とするのが一般的である。(Problems to be Solved by the Invention) However, in the conventional spherical joint, no special consideration is paid between the inner diameter of the spherical joint body and the dimensions of the piping, and the inner diameter of the spherical joint body 3 is D to main pipe 4
Generally, the size is larger than the inner diameter d of D/d>1.7.
このため球型本体１内に流れのよどみ部が生
じ、このよどみ部に渦流れ等の非定常流れが存在
し、球型継手の流動抵抗が大きくなるという問題
点があつた。 For this reason, a flow stagnation portion is generated in the spherical body 1, and an unsteady flow such as a vortex flow exists in this stagnation portion, resulting in a problem that the flow resistance of the spherical joint becomes large.
（問題点を解決するための手段）
本発明はこのような問題点を解決するために提
案されたもので、球型継手本体に、１本の母管と
２本の枝管とを接続した流体配管の球型継手にお
いて、前記球型継手本体の内径Ｄと前記母管の内
径ｄの比率を1.3＜Ｄ／ｄ＜1.7となるように設定
したことを特徴とする球型継手に係るものであ
る。(Means for Solving the Problems) The present invention was proposed in order to solve the above problems, and is a method in which one main pipe and two branch pipes are connected to a spherical joint body. A spherical joint for fluid piping, characterized in that the ratio of the inner diameter D of the spherical joint body to the inner diameter d of the main pipe is set to be 1.3<D/d<1.7. It is.
（作用）
本発明は、球型継手を、球型の継手本体の内径
と同継手本体に接続される母管の内径との比が大
きい大きなサイズとすると、継手内部に流れのよ
どみ部が生じて流動抵抗が増大するということに
着目して、モデルテストを実施した結果、球型継
手本体の内径Ｄを母管の内径ｄと比較して、1.3
＜Ｄ／ｄ＜1.7とすることにより、継手本体内に
おける流れのよどみ部をなくし、流動抵抗が小さ
くしうるとともに、強度上の安全性を保持しうる
ことを発見し、この知見に基いて提案されたもの
である。(Function) In the present invention, when the spherical joint is made large in size with a large ratio of the inner diameter of the spherical joint body to the inner diameter of the main pipe connected to the joint body, a flow stagnation portion occurs inside the joint. Focusing on the fact that the flow resistance increases when the spherical joint body increases, we conducted a model test and found that the inner diameter D of the spherical joint body was compared with the inner diameter d of the main pipe, and was found to be 1.3
We discovered that by setting <D/d<1.7, flow stagnation within the joint body can be eliminated, flow resistance can be reduced, and safety in terms of strength can be maintained.Based on this knowledge, we have made a proposal. It is what was done.
（発明の効果）
このように本発明に係る球型継手においては、
球型の継手本体の内径Ｄと母管の内径ｄとの比
を、1.3＜Ｄ／ｄ＜1.7とすることによつて、流動
抵抗を減少せしめることができ、また形状が均一
で肉厚を薄くしうることによつて、熱疲労等に対
する寿命消費を減少することができるものであ
る。(Effect of the invention) As described above, in the spherical joint according to the present invention,
By setting the ratio of the inner diameter D of the spherical joint body to the inner diameter d of the main pipe to 1.3<D/d<1.7, flow resistance can be reduced, and the shape is uniform and the wall thickness can be reduced. By making it thinner, it is possible to reduce the life consumption due to thermal fatigue and the like.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
１１は球型の継手本体で、１本の母管１２及び
２本の枝管１３，１３が接続されている。 Reference numeral 11 denotes a spherical joint body to which one main pipe 12 and two branch pipes 13, 13 are connected.
而して前記継手本体１１の内径Ｄは母管１２の
内径ｄと比較して、1.3＜Ｄ／ｄ＜1.7となるよう
に構成されている。 The inner diameter D of the joint body 11 is configured to be 1.3<D/d<1.7 when compared with the inner diameter d of the main pipe 12.
第２図及び第３図は本発明に係る球型継手と従
来型の球型継手との圧力損失抵抗数の実験結果を
示し、第２図は母管１２より流体を球形の継手本
体１１に流入せしめて２本の枝管１３，１３に分
岐させるように構成された分岐球の実験結果を示
し、第３図は形状は第２図の場合と全く同じであ
るが、流体を２本の１３，１３より継手本体１１
に流入せしめて１本の母管１２に集約するように
構成された合流球の実験結果を示すものである。 2 and 3 show the experimental results of the pressure loss resistance of the spherical joint according to the present invention and the conventional spherical joint. Fig. 3 shows the experimental results of a branching sphere configured to allow fluid to flow in and branch into two branch pipes 13, 13. 13, 13 to the joint body 11
This figure shows the results of an experiment using a merging sphere configured to allow the flow to flow into one main tube 12.
なお、図中Ａは本発明に係る球型継手を、Ｂは
従来型の球型継手を示す。 Note that in the figure, A indicates a spherical joint according to the present invention, and B indicates a conventional spherical joint.
以上の実験結果より明らかなように、本発明の
球型継手は従来型の球型継手に比して合流流れに
おいて、25％分岐流れにおいて15％の圧力損失の
低減を図ることができる。 As is clear from the above experimental results, the spherical joint of the present invention can reduce pressure loss by 15% in a combined flow and a 25% branched flow, compared to a conventional spherical joint.
以上本発明を実施例について説明したが、本発
明は勿論このように実施例にだけ局限されるもの
ではなく、本発明の精神を逸脱しない範囲内で種
種の設計を改変を施しうるものである。 Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to these embodiments, and various designs may be modified without departing from the spirit of the present invention. .
第１図は本発明に係る球型継手の一実施例を示
す横断平面図、第２図及び第３図は夫々本発明に
係る球型継手並に従来型の球型継手の圧力損失抵
抗係数の実験結果を示す図表、第４図及び第５図
は夫々従来のＹ型継手並に従来型の球型継手の横
断平面図である。
１１……継手本体、１２……母管、１３……枝
管。
FIG. 1 is a cross-sectional plan view showing an embodiment of the spherical joint according to the present invention, and FIGS. 2 and 3 are pressure loss resistance coefficients of the spherical joint according to the present invention and the conventional spherical joint, respectively. 4 and 5 are cross-sectional plan views of a conventional Y-shaped joint and a conventional spherical joint, respectively. 11... Joint body, 12... Main pipe, 13... Branch pipe.
Claims (1)
を接続した流体配管の球型継手において、前記球
型継手本体の内径Ｄと前記母管の内径ｄの比率を
1.3＜Ｄ／ｄ＜1.7となるように設定したことを特
徴とする球型継手。1 In a spherical joint for fluid piping in which one main pipe and two branch pipes are connected to a spherical joint main body, the ratio of the inner diameter D of the spherical joint main body to the inner diameter d of the main pipe is
A spherical joint characterized by being set so that 1.3<D/d<1.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18162085A JPS6246091A (en) | 1985-08-21 | 1985-08-21 | Spherical type joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18162085A JPS6246091A (en) | 1985-08-21 | 1985-08-21 | Spherical type joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6246091A JPS6246091A (en) | 1987-02-27 |
| JPH0582518B2 true JPH0582518B2 (en) | 1993-11-19 |
Family
ID=16103976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18162085A Granted JPS6246091A (en) | 1985-08-21 | 1985-08-21 | Spherical type joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6246091A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588069U (en) * | 1981-07-10 | 1983-01-19 | 株式会社日立製作所 | absorption refrigerator |
-
1985
- 1985-08-21 JP JP18162085A patent/JPS6246091A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6246091A (en) | 1987-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |