JPS6222644Y2 - - Google Patents
Info
- Publication number
- JPS6222644Y2 JPS6222644Y2 JP12802481U JP12802481U JPS6222644Y2 JP S6222644 Y2 JPS6222644 Y2 JP S6222644Y2 JP 12802481 U JP12802481 U JP 12802481U JP 12802481 U JP12802481 U JP 12802481U JP S6222644 Y2 JPS6222644 Y2 JP S6222644Y2
- Authority
- JP
- Japan
- Prior art keywords
- partition plate
- suction
- pump
- curved pipe
- pipe
- 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
- 238000005192 partition Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
- Pipe Accessories (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】
この考案はポンプの吸込曲管に関する。機械的
エネルギーを液体に与えて、主として圧力エネル
ギーに変換する機械であるポンプにおいて、ター
ボ形、容積形、渦流形など種々の形式があり、か
つこれらのポンプにおいても吸込口の中心線の方
向がその中心線に直角な断面において、水平、垂
直又は水平軸に対して角度を有するものなどに分
類できる。[Detailed description of the invention] This invention relates to a suction curved pipe of a pump. There are various types of pumps, which are machines that apply mechanical energy to liquid and mainly convert it into pressure energy, such as turbo type, positive displacement type, and vortex type, and the direction of the center line of the suction port is also the same in these pumps. In a cross section perpendicular to its centerline, it can be classified as horizontal, vertical, or at an angle to the horizontal axis.
この考案はポンプの吸込口の中心線の方向が水
平又は水平に近い角度を有し吸込口の先端には直
角状に曲つた曲管を介して直線状の直管が低位レ
ベルの液体中に挿入されるポンプの吸込管路の形
状の改良に関するものであり、この考案によれば
吸込管路内を流れる液体中のキヤビテーシヨン、
うず等の発生を防止し、乱れの少ない流れを得
て、ポンプの吸込効率を向上させると同時に発生
騒音を低減させたポンプを得たものである。 In this device, the direction of the center line of the pump's suction port is horizontal or at an angle close to horizontal, and a straight pipe is inserted into the liquid at a low level via a curved pipe bent at right angles at the tip of the suction port. This invention relates to improving the shape of the suction pipe of a pump to be inserted, and according to this invention, cavitation in the liquid flowing inside the suction pipe,
The present invention provides a pump that prevents the occurrence of eddies, etc., obtains a flow with little turbulence, improves the suction efficiency of the pump, and at the same time reduces the generated noise.
図について説明すれば、第１図は従来のポンプ
の側面図、第２図は第１図のＸ−Ｘ線に沿う断面
図であつて、１はポンプを構成する胴体、２は羽
根車、３は胴体１の一部を構成する吸込フラン
ジ、４は吐出しフランジである。 To explain the figures, FIG. 1 is a side view of a conventional pump, and FIG. 2 is a sectional view taken along the line X-X in FIG. 3 is a suction flange that constitutes a part of the body 1, and 4 is a discharge flange.
吸込フランジ３は吸込曲管５を介してその一部
が液面下に挿入される吸込直管６と結合し吸込通
路を構成する。図示の如く吸込口の流れの方向は
ほぼ水平である。一般に吐出しフランジ４の先端
には吐出し管７などが結合され液体を目的位置ま
で案内する。液体は矢印Ｆの如く流れる。 The suction flange 3 is connected to a straight suction pipe 6, a portion of which is inserted below the liquid surface, via a bent suction pipe 5 to form a suction passage. As shown, the direction of flow at the suction port is approximately horizontal. Generally, a discharge pipe 7 or the like is connected to the tip of the discharge flange 4 to guide the liquid to a target position. The liquid flows as shown by arrow F.
しかして例えばJISB8301−1976“遠心ポン
プ、斜流ポンプ、軸流ポンプの試験及び検査方
法”にも示されるように吸込フランジ３付近には
吸込曲管５との間に4D（Ｄは吸込管直径）以上
の直線部が確保されなければならない。これは
4D以上の直線部が確保されない場合は吸込曲管
５の直後と吸込フランジ３の付近にうず、キヤビ
テーシヨンなどが発生し、ポンプ本来の性能を発
揮できない原因になるためである。しかし現実に
ポンプを機場に設置する場合はスペースその他の
関係上直線部が取れないか又は4D以下の場合が
多くそのための手段として第１図、第２図に示す
如く仕切板８が設けられ、曲管の曲がりの外側の
壁面５１と仕切板８とで囲まれる流路と、曲管の
曲がりの内側の壁面５２と仕切板８とで囲まれる
流路とに分け、吸込まれる流体を可能な限り乱れ
の少ない流れに近づけるような構成がとられてい
る。しかし仕切板８が設けられた場合でも第３図
に示す如く流れの方向に流体の慣性力の影響をう
けて図の上方部に集中し、かつ下方部にはうず又
はキヤビテーシヨン等が発生する。 For example, as shown in JISB8301-1976 "Testing and Inspection Methods for Centrifugal Pumps, Mixed Flow Pumps, and Axial Flow Pumps", there is a gap of 4D (D is the diameter of the suction pipe) between the suction flange 3 and the suction curved pipe 5. ) or more straight sections must be secured. this is
This is because if a straight section of 4D or more is not secured, eddies, cavitation, etc. will occur immediately after the suction curved pipe 5 and near the suction flange 3, which will cause the pump to be unable to exhibit its original performance. However, when a pump is actually installed at a pump station, it is often impossible to have a straight section due to space or other reasons, or it is often less than 4D, as shown in Figures 1 and 2, a partition plate 8 is provided as a means for this purpose. The fluid is divided into a flow path surrounded by the wall surface 51 outside the bend of the curved pipe and the partition plate 8, and a flow path surrounded by the wall surface 52 inside the bend of the curved pipe and the partition plate 8, allowing the fluid to be sucked in. The structure is designed to approximate a flow with as little turbulence as possible. However, even when the partition plate 8 is provided, as shown in FIG. 3, the fluid is influenced by the inertial force of the fluid in the direction of flow and concentrates in the upper part of the figure, and eddies or cavitations occur in the lower part.
第４図、第５図はこの発明の実施例を示し、仕
切板８のポンプ側に近い一端部９，９′を流体の
流れの方向が図の上方部に片寄ることを防ぐ目的
で、うず、キヤビテーシヨンなどの発生し易い下
方部に、直線状又は曲線状に折り曲げて構成され
ている。 FIGS. 4 and 5 show an embodiment of the present invention, in which one end 9, 9' of the partition plate 8 near the pump is provided with a swirl for the purpose of preventing the direction of fluid flow from shifting toward the upper part of the figure. , the lower portion where cavitation is likely to occur is bent in a straight or curved manner.
吸込曲管５の内部の、仕切板によつて区画され
た流路の断面積は、曲管５の曲がりの外側の壁面
５１と仕切板８とで囲まれた流路では、仕切板の
先端１０（又は１０′）を通る断面Ｚ−Ｚにおけ
る面積S3は上流において曲管５にひいた接線に垂
直な断面Ｙ−Ｙにおける流路の面積S1より大き
い。（即ち出口端における面積が最大となる。）
又、曲管５の曲がりの内側の壁面５２と仕切板８
とで囲まれた流路においては逆に仕切板８の出口
端を通る断面Ｚ−Ｚにおける面積S4は断面Ｙ−Ｙ
における面積S2より小さい。（即ち出口端におけ
る面積が最小になる。）尚第４図の実施例では延
長部分９は直線状をなしており、第５図の実施例
では延長部分９′は円弧状をなしている。 The cross-sectional area of the flow path inside the suction curved pipe 5 divided by the partition plate is, in the flow path surrounded by the wall surface 51 on the outside of the curve of the curved pipe 5 and the partition plate 8, 10 (or 10') is larger than the area S 1 of the flow path in a cross section YY perpendicular to the tangent drawn to the curved pipe 5 in the upstream. (In other words, the area at the exit end is maximum.)
Moreover, the wall surface 52 inside the bend of the curved pipe 5 and the partition plate 8
Conversely, in the flow path surrounded by
The area in S is smaller than 2 . (That is, the area at the outlet end is minimized.) In the embodiment of FIG. 4, the extension 9 has a linear shape, and in the embodiment of FIG. 5, the extension 9' has a circular arc shape.
第６図、第７図はこの考案のさらに他の一例を
示すもので、流体の流れをより層流に近ずけるた
めに、複数枚の仕切板８を設けた構成であつて、
第４図、第５図に示した例と同様に、曲管５の曲
がりの外側の壁面５１と仕切板８とで囲まれた流
路の仕切板の先端１０（又は１０′）を通る断面
における面積S3は上流の断面Ｙ−Ｙにおける面積
S1より大きく、（即ちS3が最大）又曲管の曲がり
の内側の壁面５２と仕切板８とで囲まれた流路の
出口端の面積S4は上流の断面Ｙ−Ｙにおける面積
S2より小さい。（即ちS4が最小）さらに第６図で
は延長部分９が直線状をなし、第７図では延長部
分９′は円弧状をなしている。 FIGS. 6 and 7 show still another example of this invention, in which a plurality of partition plates 8 are provided to make the fluid flow more laminar.
Similar to the examples shown in FIGS. 4 and 5, a cross section passing through the tip 10 (or 10') of the partition plate of the flow path surrounded by the wall surface 51 on the outside of the bend of the curved pipe 5 and the partition plate 8. The area S 3 is the area at the upstream cross section Y-Y
The area S 4 of the outlet end of the flow path, which is larger than S 1 (that is, S 3 is the maximum) and surrounded by the wall surface 52 inside the bend of the curved pipe and the partition plate 8, is the area at the upstream cross section Y-Y.
Smaller than S 2 . (That is, S 4 is the minimum) Furthermore, in FIG. 6, the extension 9 has a straight line shape, and in FIG. 7, the extension 9' has an arc shape.
そのためポンプに吸込まれる流体にきわめて乱
れの少ない状態となり、キヤビテーシヨン、うず
発生などによる弊害を除去する効果が大きい。 Therefore, the fluid sucked into the pump is in a state with very little turbulence, which is highly effective in eliminating problems such as cavitation and eddying.
第１図は従来のポンプの構成を示す側断面図、
第２図は第１図のＸ−Ｘ線に沿う断面図、第３図
は従来例の吸込曲管後の流体の状態を示す図、第
４図、第５図、第６図、第７図は夫々この考案の
実施例を示す図である。
符号の説明、１……胴体、２……羽根車、３…
…吸込フランジ、４……吐出しフランジ、５……
吸込曲管、６……吸込直管、７……吐出し管、８
……仕切板、９，９′……仕切板の一端部、１
０，１０′……仕切板の先端、S1，S2，S3，S4…
…仕切板で仕切られた各部の断面積。
Figure 1 is a side sectional view showing the configuration of a conventional pump;
Figure 2 is a sectional view taken along the line X-X in Figure 1, Figure 3 is a diagram showing the state of the fluid after the suction curved pipe of the conventional example, Figures 4, 5, 6, and 7. The figures each show an embodiment of this invention. Explanation of symbols, 1...body, 2...impeller, 3...
...Suction flange, 4...Discharge flange, 5...
Suction bent pipe, 6...Suction straight pipe, 7...Discharge pipe, 8
...Partition plate, 9, 9'...One end of partition plate, 1
0,10'... Tip of partition plate, S 1 , S 2 , S 3 , S 4 ...
...The cross-sectional area of each part separated by a partition plate.
Claims (1)
はそれに近い角度を有し、該吸込口は直角又はそ
れに近い角度を有する吸込曲管を介して液面下に
挿入されたポンプ配管において、吸込曲管からポ
ンプに到る部分の液体の流れを改善するために吸
込曲管に設けられた仕切板の、ポンプ側に近い部
分が直線状、又は曲線状をなして曲げられて配置
され、そのため仕切板によつて区画された流路の
断面積が、曲管の曲がりの外側の壁面と仕切板と
で囲まれる流路においては仕切板の出口端で最大
となり、曲管の曲がりの内側の壁面と仕切板とで
囲まれる流路においては仕切板の出口端で最小と
なるように形成されていることを特徴とするポン
プの吸込曲管。 In pump piping, the flow direction of the pump suction port is horizontal or has an angle close to it, and the suction port is inserted below the liquid surface through a suction curved pipe having a right angle or a nearly right angle. In order to improve the flow of liquid from the curved pipe to the pump, the part of the partition plate provided in the suction curved pipe near the pump side is bent in a straight or curved shape, and therefore The cross-sectional area of the flow path divided by the partition plate is maximum at the outlet end of the partition plate in the flow path surrounded by the wall surface outside the bend of the curved pipe and the partition plate, and 1. A bent suction pipe for a pump, characterized in that in a flow path surrounded by a wall surface and a partition plate, the minimum value is formed at the outlet end of the partition plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12802481U JPS5833887U (en) | 1981-08-31 | 1981-08-31 | pump suction pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12802481U JPS5833887U (en) | 1981-08-31 | 1981-08-31 | pump suction pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5833887U JPS5833887U (en) | 1983-03-05 |
| JPS6222644Y2 true JPS6222644Y2 (en) | 1987-06-09 |
Family
ID=29921737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12802481U Granted JPS5833887U (en) | 1981-08-31 | 1981-08-31 | pump suction pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5833887U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386210B (en) * | 2017-09-07 | 2020-05-01 | 扬州市勘测设计研究院有限公司 | Elbow-shaped water inlet runner with arc-shaped flow distribution plate |
-
1981
- 1981-08-31 JP JP12802481U patent/JPS5833887U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5833887U (en) | 1983-03-05 |
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