JP2003206885A - Underwater eddy preventing apparatus for pump feed water tank - Google Patents
Underwater eddy preventing apparatus for pump feed water tankInfo
- Publication number
- JP2003206885A JP2003206885A JP2002006092A JP2002006092A JP2003206885A JP 2003206885 A JP2003206885 A JP 2003206885A JP 2002006092 A JP2002006092 A JP 2002006092A JP 2002006092 A JP2002006092 A JP 2002006092A JP 2003206885 A JP2003206885 A JP 2003206885A
- Authority
- JP
- Japan
- Prior art keywords
- ceiling
- pump
- width direction
- underwater
- pump feed
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 230000002265 prevention Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、ポンプ吸水槽の水
中渦防止装置に関する。
【０００２】
【従来の技術】図７および図８に示すように、クローズ
型ポンプ吸水槽３は、排水ポンプ１の吸込口２がポンプ
吸水槽３の幅方向中央部に位置決めされ、ポンプ吸水槽
３が排水ポンプ１の吸込口２に通じる底面４、両側立面
５、後側立面６および天井７で囲まれた閉断面構造によ
ってなり、後側立面６の幅方向中央部に前側に突出する
凸部８が底面４から天井７にかけて一様に突設されてい
る。このポンプ吸水槽３では、凸部８によって吸込口２
の直後方の狭い領域における水の旋回を妨げて、旋回流
が水中渦に発達するのを抑制して、水中渦が発生するの
を防止できる。
【０００３】
【発明が解決しようとする課題】ところが、前記構成の
ポンプ吸水槽３では、凸部８の幅方向両側の領域、つま
り排水ポンプ１の吸込口２の斜め後方の広い領域での水
の旋回を妨げて、旋回流が水中渦に発達するのを抑制で
きないので、後側立面６から水中渦９，９が発生して排
水ポンプ１に吸い込まれ、振動や騒音などを発生させる
ことになる。
【０００４】一方、この種のポンプ吸水槽３では、水の
流速を高めることで小型化を図り、ポンプ吸水槽３の建
設コストを削減することができる。しかし、流速が高く
なるほど水中渦９，９の発生がより顕著になるので、ポ
ンプ吸水槽３の小型化を妨げている。
【０００５】本発明は、このような事情に鑑みてなされ
たもので、第１凸部の幅方向両側の領域、つまり排水ポ
ンプの吸込口の斜め後方の広い領域での水中渦の発生を
防止することにより、振動や騒音の発生を避けることが
できるとともに、流速を高めてポンプ吸水槽の小型化を
図ることができるポンプ吸水槽の水中渦防止装置を提供
することを目的としている。
【０００６】
【課題を解決するための手段】前記目的を達成するため
に、本発明に係るポンプ吸水槽の水中渦防止装置は、排
水ポンプの吸込口がポンプ吸水槽の幅方向中央部に位置
決めされ、前記ポンプ吸水槽が前記排水ポンプの吸込口
に通じる底面、両側立面、後側立面および天井で囲まれ
た閉断面構造によってなり、前記後側立面の幅方向中央
部に前側に突出する第１凸部が前記底面から天井にかけ
て設けられているポンプ吸水槽の水中渦防止装置におい
て、前記第１凸部の幅方向両側の後側立面の前記底面と
前記天井の間に第２凸部が前側に突出して設けられてい
ることを特徴としている。
【０００７】本発明によれば、第１凸部の幅方向両側の
領域、つまり排水ポンプの吸込口の斜め後方の広い領域
での水の旋回を第２凸部によって妨げて、この広い領域
で旋回流が水中渦に発達するのを抑制することができる
ので、前記広い領域に水中渦が発生するのを防止でき
る。
【０００８】
【発明の実施の形態】以下、本発明の一実施の形態を図
面に基づいて説明する。図１は本発明の一実施の形態を
示す平面図、図２は図１の縦断側面図である。なお、前
記図７および図８で説明した従来例と同一もしくは相当
部分には、同一符号を付して説明する。図１および図２
において、ポンプ吸水槽３は、排水ポンプ１の吸込口２
がポンプ吸水槽３の幅方向中央部に位置決めされ、ポン
プ吸水槽３が排水ポンプ１の吸込口２に通じる底面４、
両側立面５、後側立面６および天井７で囲まれた閉断面
構造によってなり、後側立面６の幅方向中央部に前側に
突出する第１凸部８が底面４から天井７にかけて一様に
突設されている。
【０００９】一方、第１凸部８の幅方向両側の後側立面
６の底面４と天井７の間に、板状の第２凸部１０，１０
が第１凸部８の幅方向両側の全域にわたって前側に突出
して水平に設けられている。
【００１０】このような構成であれば、第１凸部８の幅
方向両側の領域、つまり排水ポンプ１の吸込口２の斜め
後方の広い領域での水の旋回を第２凸部１０，１０によ
って妨げて、この広い領域で旋回流が水中渦に発達する
のを抑制することができるので、前記広い領域に水中渦
が発生するのを防止できる。その結果、排水ポンプ１に
水中渦が吸込まれなくなるため、振動や騒音の発生を避
けることができるとともに、流速を高めてポンプ吸水槽
３の小型化を図ることが可能になる。このため、ポンプ
吸水槽３の建設コストを削減することができる。
【００１１】なお、前記実施の形態では、第１凸部８の
幅方向両側の後側立面６の底面４と天井７の間に、板状
の第２凸部１０，１０を第１凸部８の幅方向両側の全域
にわたって前側に突出して水平に設けた構造で説明して
いるが、図３および図４に示すように、第１凸部８の幅
方向両側の後側立面６の底面４と天井７の間に、板状の
第２凸部１０，１０を第１凸部８の幅方向両側の一部で
前側に突出して水平に設けた構造であっても、図１およ
び図２で説明した実施の形態と同様の作用・効果を奏す
ることができる。
【００１２】また、図５および図６に示すように、第１
凸部８の幅方向両側の後側立面６の底面４と天井７の間
に、筒状または柱状の第２凸部１０，１０を第１凸部８
の幅方向両側の一部で前側に突出して水平に設けた構造
であっても、図１および図２で説明した実施の形態と同
様の作用・効果を奏することができる。
【００１３】
【発明の効果】以上説明したように、本発明のポンプ吸
水槽の水中渦防止装置は構成されているので、以下のよ
うな格別の効果を奏することができる。
【００１４】すなわち、第１凸部の幅方向両側の領域、
つまり排水ポンプの吸込口の斜め後方の広い領域での水
の旋回を第２凸部によって妨げて、この広い領域で旋回
流が水中渦に発達するのを抑制することができるので、
前記広い領域に水中渦が発生するのを防止できる。その
結果、排水ポンプに水中渦が吸込まれなくなるため、振
動や騒音の発生を避けることができるとともに、流速を
高めてポンプ吸水槽の小型化を図ることが可能になる。
このため、ポンプ吸水槽の建設コストを削減することが
できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing underwater vortices in a pump suction tank. 2. Description of the Related Art As shown in FIGS. 7 and 8, a closed type pump water absorption tank 3 has a suction port 2 of a drainage pump 1 positioned at the center in the width direction of the pump water absorption tank 3. 3 has a closed cross-sectional structure surrounded by a bottom surface 4 communicating with the suction port 2 of the drainage pump 1, both-side elevation surfaces 5, a rear-side elevation surface 6 and a ceiling 7. A protruding projection 8 is uniformly provided from the bottom surface 4 to the ceiling 7. In this pump water absorption tank 3, the convex portion 8 forms the suction port 2.
The swirling of water in a narrow area immediately after is prevented, and the swirling flow is prevented from developing into an underwater vortex, thereby preventing the occurrence of underwater vortex. However, in the pump water absorbing tank 3 having the above-described structure, the water in the region on both sides in the width direction of the convex portion 8, that is, the wide region obliquely behind the suction port 2 of the drainage pump 1 is provided. Since the swirling flow cannot be prevented from developing into a submerged vortex, the submerged vortex 9, 9 is generated from the rear elevation 6 and is sucked into the drain pump 1 to generate vibration and noise. become. On the other hand, this type of pump water absorption tank 3 can be downsized by increasing the flow rate of water, and the construction cost of the pump water absorption tank 3 can be reduced. However, the higher the flow velocity, the more pronounced the occurrence of the water vortices 9, 9, which hinders downsizing of the pump water absorption tank 3. The present invention has been made in view of such circumstances, and prevents the generation of submerged vortices in regions on both sides in the width direction of the first protrusion, that is, a wide region obliquely behind the suction port of the drainage pump. Accordingly, an object of the present invention is to provide a submersible eddy prevention device for a pump water absorption tank that can avoid generation of vibration and noise, and can increase the flow velocity to reduce the size of the pump water absorption tank. [0006] In order to achieve the above object, a submersible vortex prevention device for a pump water absorption tank according to the present invention has a suction port of a drainage pump positioned at the center in the width direction of the pump water absorption tank. The pump suction tank has a closed cross-sectional structure surrounded by a bottom surface communicating with the suction port of the drainage pump, both-side elevation surfaces, a rear-side elevation surface and a ceiling. In the underwater vortex prevention device for a pump suction tank, wherein a first protruding portion protruding is provided from the bottom surface to the ceiling, a first protruding portion is provided between the bottom surface and the ceiling of a rear-side upright surface on both sides in the width direction of the first protrusion. It is characterized in that two convex portions are provided so as to protrude forward. According to the present invention, swirling of water in regions on both sides in the width direction of the first convex portion, that is, a wide region obliquely behind the suction port of the drainage pump is prevented by the second convex portion, and the wide region is prevented. Since the swirling flow can be suppressed from developing into the underwater vortex, the underwater vortex can be prevented from being generated in the wide area. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a vertical sectional side view of FIG. The same or corresponding parts as those of the conventional example described with reference to FIGS. 7 and 8 are denoted by the same reference numerals. 1 and 2
, The pump suction tank 3 is provided with the suction port 2 of the drainage pump 1.
Is positioned at the center in the width direction of the pump water absorption tank 3, and the pump water absorption tank 3 has a bottom surface 4 communicating with the suction port 2 of the drainage pump 1.
It has a closed cross-sectional structure surrounded by both sides upright 5, rear side upright 6, and ceiling 7, and a first projection 8 projecting forward from the bottom 4 to the ceiling 7 at the center in the width direction of the rear side upright 6. Projected uniformly. On the other hand, between the bottom surface 4 of the rear standing surface 6 on both sides in the width direction of the first convex portion 8 and the ceiling 7, plate-like second convex portions 10, 10 are provided.
Are horizontally provided so as to protrude to the front side over the entire area on both sides in the width direction of the first convex portion 8. With such a configuration, the swirling of water in the region on both sides in the width direction of the first convex portion 8, that is, in the wide region obliquely behind the suction port 2 of the drainage pump 1, is performed. It is possible to prevent the swirling flow from developing into the underwater vortex in this wide area, thereby preventing the underwater vortex from being generated in the wide area. As a result, since the submersible vortex is not sucked into the drain pump 1, it is possible to avoid the generation of vibration and noise, and it is possible to increase the flow velocity and reduce the size of the pump water absorption tank 3. For this reason, the construction cost of the pump water absorption tank 3 can be reduced. In the above-described embodiment, the plate-like second protrusions 10 and 10 are provided between the bottom surface 4 of the rear standing surface 6 and the ceiling 7 on both sides in the width direction of the first protrusion 8. Although the structure is described in which it is provided horizontally so as to protrude to the front side over the entire area on both sides in the width direction of the portion 8, as shown in FIGS. 1 is provided horizontally between the bottom surface 4 and the ceiling 7 by projecting the plate-like second convex portions 10 and 10 to the front side at portions on both sides in the width direction of the first convex portions 8. The same operation and effect as those of the embodiment described with reference to FIG. 2 can be obtained. As shown in FIGS. 5 and 6, the first
Between the bottom surface 4 of the rear standing surface 6 on both sides in the width direction of the convex portion 8 and the ceiling 7, cylindrical or columnar second convex portions 10, 10 are inserted into the first convex portion 8.
1 and 2, the same operation and effect as those of the embodiment described with reference to FIGS. 1 and 2 can be obtained. As described above, the underwater eddy prevention device of the pump suction tank according to the present invention is constituted, so that the following special effects can be obtained. That is, regions on both sides in the width direction of the first convex portion,
In other words, the swirling of water in a wide area obliquely behind the suction port of the drainage pump is prevented by the second convex portion, and the swirling flow can be prevented from developing into a submerged vortex in this wide area.
It is possible to prevent underwater vortices from being generated in the wide area. As a result, since the submersible vortex is not sucked into the drain pump, generation of vibration and noise can be avoided, and the flow velocity can be increased to reduce the size of the pump suction tank.
For this reason, the construction cost of the pump suction tank can be reduced.
【図面の簡単な説明】
【図１】本発明の一実施の形態を示す平面図である。
【図２】図１の縦断側面図である。
【図３】本発明の他の実施の形態を示す平面図である。
【図４】図３の縦断側面図である。
【図５】本発明のさらに異なる実施の形態を示す平面図
である。
【図６】図５の縦断側面図である。
【図７】従来例の平面図である。
【図８】図７の縦断側面図である。
【符号の説明】
１ 排水ポンプ
２ 吸込口
３ ポンプ吸水槽
４ 閉断面部の底面
５ 閉断面部の両側立面
６ 閉断面部の後側立面
７ 閉断面部の天井
８ 第１凸部
１０ 第２凸部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 2 is a vertical sectional side view of FIG. FIG. 3 is a plan view showing another embodiment of the present invention. FIG. 4 is a vertical sectional side view of FIG. 3; FIG. 5 is a plan view showing still another embodiment of the present invention. FIG. 6 is a vertical sectional side view of FIG. 5; FIG. 7 is a plan view of a conventional example. FIG. 8 is a vertical sectional side view of FIG. 7; [Description of Signs] 1 Drain pump 2 Suction port 3 Pump water absorption tank 4 Bottom surface of closed cross section 5 Both vertical surfaces of closed cross section 6 Rear vertical surface of closed cross section 7 Ceiling of closed cross section 8 First convex portion 10 2nd convex part
Claims (1)
方向中央部に位置決めされ、前記ポンプ吸水槽が前記排
水ポンプの吸込口に通じる底面、両側立面、後側立面お
よび天井で囲まれた閉断面構造によってなり、前記後側
立面の幅方向中央部に前側に突出する第１凸部が前記底
面から天井にかけて設けられているポンプ吸水槽の水中
渦防止装置において、前記第１凸部の幅方向両側の後側
立面の前記底面と前記天井の間に第２凸部が前側に突出
して設けられていることを特徴とするポンプ吸水槽の水
中渦防止装置。Claims: 1. A suction port of a drainage pump is positioned at a central portion in a width direction of a pump water suction tank, and the pump water suction tank is connected to a bottom face, both side elevation faces, and a rear side communicating with a suction port of the drainage pump. Preventing underwater eddy of a pump water absorption tank having a closed cross-sectional structure surrounded by an elevation and a ceiling, and a first projection protruding forward at the center in the width direction of the rear elevation from the bottom to the ceiling. In the apparatus, a second convex portion is provided between the bottom surface and the ceiling of the rear standing surface on both sides in the width direction of the first convex portion so as to protrude forward. Prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002006092A JP2003206885A (en) | 2002-01-15 | 2002-01-15 | Underwater eddy preventing apparatus for pump feed water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002006092A JP2003206885A (en) | 2002-01-15 | 2002-01-15 | Underwater eddy preventing apparatus for pump feed water tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003206885A true JP2003206885A (en) | 2003-07-25 |
Family
ID=27644958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002006092A Pending JP2003206885A (en) | 2002-01-15 | 2002-01-15 | Underwater eddy preventing apparatus for pump feed water tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003206885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3284952A1 (en) * | 2016-08-15 | 2018-02-21 | Sulzer Management AG | Inlet device for a vertical pump and an arrangement comprising such an inlet device |
-
2002
- 2002-01-15 JP JP2002006092A patent/JP2003206885A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3284952A1 (en) * | 2016-08-15 | 2018-02-21 | Sulzer Management AG | Inlet device for a vertical pump and an arrangement comprising such an inlet device |
| CN107762978A (en) * | 2016-08-15 | 2018-03-06 | 苏尔寿管理有限公司 | For vertical pump inlet device and include the arrangement of this inlet device |
| US10844874B2 (en) | 2016-08-15 | 2020-11-24 | Sulzer Management Ag | Inlet device for a vertical pump and an arrangement comprising such an inlet device |
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