WO2008023515A1 - pompe à aspiration automatique - Google Patents

pompe à aspiration automatique Download PDF

Info

Publication number
WO2008023515A1
WO2008023515A1 PCT/JP2007/064256 JP2007064256W WO2008023515A1 WO 2008023515 A1 WO2008023515 A1 WO 2008023515A1 JP 2007064256 W JP2007064256 W JP 2007064256W WO 2008023515 A1 WO2008023515 A1 WO 2008023515A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
partition wall
opening
self
front partition
Prior art date
Application number
PCT/JP2007/064256
Other languages
English (en)
Japanese (ja)
Inventor
Yasumasa Kurihara
Original Assignee
Iwaki Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iwaki Co., Ltd. filed Critical Iwaki Co., Ltd.
Publication of WO2008023515A1 publication Critical patent/WO2008023515A1/fr

Links

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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/026—Details of the bearings

Definitions

  • the present invention relates to a self-priming pump that includes a tank chamber that stores priming water and that has an impeller that is rotationally driven in the tank chamber.
  • a self-priming pump that transfers a transfer fluid to a predetermined place by sucking the transfer fluid from the suction port and discharging it to the discharge port has been known.
  • priming water is introduced into the tank chamber at the start of operation, and by rotating the impeller disposed in the tank chamber, the gas remaining in the tank is discharged from the discharge port together with the priming water, A self-priming operation is performed in which only the transfer fluid is filled in the tank.
  • This type of self-priming pump for example, the one described in Patent Document 1 is known.
  • This self-priming pump has an inner diameter of a mouth part of a partition plate that partitions the first casing and the second casing made of synthetic resin, and an outer diameter of an impeller (impeller) into which the tip is inserted. It is intended to improve pumping performance and pump efficiency by reducing the gap and restricting the transfer fluid that flows backward from the pump chamber to the suction side through the gap.
  • Patent Document 1 JP 2005-48675
  • the above-described self-priming pump has a drawback in that it is difficult to manage the inner diameter of the mouse portion and the outer diameter of the impeller.
  • the present invention has been made in view of these points, and an object of the present invention is to provide a self-priming pump capable of improving the efficiency of the pump by restricting the backflow of the fluid transferred to the suction side. Means to solve the problem
  • a self-priming pump includes a casing having a suction port and a discharge port for a transfer fluid, and the inside of the casing is partitioned to form a pump chamber and communicate with the suction port.
  • a front partition that forms an inlet on the front side of the pump chamber, and is rotatably accommodated coaxially with the inlet in the pump chamber, and the transfer fluid is placed in a portion facing the inlet of the front partition.
  • An impeller that is formed with an opening for introduction and discharges the transfer fluid introduced from the opening from the outer periphery, a support member that supports the impeller rotatably and slidably in the direction of the rotation axis, and the impeller
  • a rotational drive means for rotationally driving, and at least one of the inlet of the front partition and the opening of the impeller, projecting in a direction parallel to the rotation axis, and the inlet of the front partition and the opening of the impeller;
  • a backflow-preventing protrusion that covers at least one of the inner and outer peripheral side gaps in the direction of the rotation axis between them.
  • the labyrinth structure is applied to the fluid that flows backward, limiting the backflow.
  • the pump can be started quickly by preventing a reduction in the degree of vacuum on the inlet side. After the pump is started, axial thrust is generated in the impeller, and the annular gap between the front partition inlet and the impeller opening is closed, and backflow of fluid in this portion is prevented. As a result, the pump efficiency can be maximized.
  • FIG. 1 is a cross-sectional view of a self-priming pump according to a first embodiment.
  • FIG. 2 is an enlarged cross-sectional view of FIG.
  • FIG. 3 is an enlarged cross-sectional view of a self-priming pump according to a second embodiment.
  • FIG. 4 is an enlarged sectional view of a self-priming pump according to a third embodiment.
  • FIG. 5 is an enlarged cross-sectional view of a self-priming pump according to a fourth embodiment.
  • FIG. 6 is an enlarged cross-sectional view of a self-priming pump according to a fifth embodiment.
  • FIG. 1 is a cross-sectional view showing the overall configuration of the self-priming pump according to the first embodiment of the present invention.
  • the self-priming magnet pump includes a casing 1 and a pump body 2 mounted on the rear side of the casing 1.
  • pump the self-priming magnet pump is simply referred to as “pump”.
  • the casing 1 is partitioned by a partition wall 5 into a first casing 3 on the front side and a second casing 4 on the rear side.
  • a suction port 3a projects from the front end of the first casing 3 toward the front side.
  • a flange 6 is provided at the tip of the suction port 3a.
  • the suction port 3a extends vertically from the lower part of the pump to the upper part of the first casing 3, and has a tip end of the suction pipe 7 bent at approximately 90 degrees toward the suction port 3a at the height of the suction port 3a. It is connected.
  • a flange 7a is formed at the tip of the suction pipe 7, and the flange 7a of the suction pipe 7 and the flange 6 of the suction pipe 3a are fastened by screws or the like not shown through an O-ring 8. ing.
  • a liquid supply hole 3 b for introducing a liquid as priming water into the first tank chamber 9 is formed on the upper surface of the first casing 3.
  • the liquid supply hole 3b is fitted with a valve 11 via an O-ring 10. The hole 3b can be opened and closed.
  • the first tank chamber 9 has three chambers extending in the vertical direction in a direction orthogonal to the drawing sheet, and only the middle suction chamber 9A is shown in the drawing.
  • the chambers on both sides communicate with each other via a communication chamber 9B defined by the upper partition plate 12, and communicate with the suction chamber 9A at the upper end.
  • the upper partition plate 12 is formed with a hole 12 a penetrating in the vertical direction at a position in contact with the partition plate 5.
  • a lower tank chamber 9C is provided below the connection chamber 9B via a lower partition plate 13.
  • a drainage port 3c that protrudes to the outside is formed at a position in contact with the bottom surface of the lower tank chamber 9C.
  • the partition plate 5 that partitions the first casing 3 and the second casing 4 has an upper partition plate at the lower end.
  • a circular suction hole 5a in contact with 12 is provided.
  • a hole 5b for connecting the lower tank chamber 9C and the second casing 4 near the bottom is formed.
  • the second casing 4 is configured to include a second tank chamber 20 that accommodates a transfer fluid and a part of the pump body 2 therein.
  • the internal space of the second tank chamber 20 is divided into a lower tank chamber 20B that generates a vortex by the partition plate 21 and the like, and a discharge chamber 20A that communicates with the lower tank chamber 20B!
  • a projecting port 4a projecting upward is formed at the upper end of the second casing 4, and a flange 22 is provided at the tip of the outlet 4a.
  • the discharge port 4a is connected to the rear end portion of the discharge pipe 23 extending upward from the upper end of the pump.
  • a flange 23a is formed at the rear end of the discharge pipe 23.
  • the flange 23a of the discharge pipe 23 and the flange 22 of the discharge port 4a are connected to each other with screws or the like (not shown) via an O-ring 24. It is connected by.
  • an opening 4b is formed on the side surface on the rear side, and the opening 4b
  • the pump chamber portion of the pump body 2 is installed in the lower tank chamber 20B.
  • FIG. 2 is an enlarged cross-sectional view of the pump body 2 in FIG.
  • the pump body 2 includes a front partition wall 26 that divides the interior of the second casing 4 and forms a pump chamber 28 therein, and a cylindrical space that communicates with the pump chamber 28 and projects from the rear side opening 4b to the rear side.
  • a cylindrical driven rotor 30 that is coaxially supported so as to be rotatable and slidable via a bearing 40, and is coaxially and integrally mounted on the front side of the driven rotor 30 and rotates in the pump chamber 28.
  • the front partition wall 26 is connected to a suction hole 5a formed on the partition plate 5 on the front side, and a cylindrical portion 26a whose base end side is an introduction port 26c for the fluid to be transferred to the pump chamber 28, and a base of the cylindrical portion 26a And a disk portion 26b that expands from the end side and forms the front side wall portion of the pump chamber 28.
  • a liner ring 50 is attached to the inlet 26c of the front partition wall 26. Holes 26d and 26e for communicating the lower tank chamber 20B of the second casing 4 and the pump chamber 28 are formed below the disc portion 26b of the front partition wall 26.
  • the disc part 26b of the front partition wall 26 is fitted with a ring-shaped partition wall 4d protruding toward the inside of the second casing 4 along the opening 4b formed on the rear side surface of the second casing 4.
  • a pump chamber 28 is formed.
  • a step 4c is formed at the edge of the opening 4b of the second casing 4, and the rear edge 27a of the rear partition 27 is fitted to the step 4c via an O-ring 25, thereby providing a rear partition.
  • the inside of 27 is sealed.
  • the driven rotator 30 includes a cylindrical rotator 30a and a driven magnet 41 embedded on the outer peripheral side of the cylindrical rotator 30a.
  • An impeller 29 is attached to the front end of the driven rotor 30.
  • the impeller 29 includes a circular plate 35, a plurality of blades 36 formed on the front side of the circular plate 35, and an annular cover joined so as to sandwich the plurality of blades 36 in pairs with the circular plate 35.
  • Member 37 In the center of the cover member 37 there is an opening 3 7a is formed, and a mouth ring 51 is attached to the periphery of the opening 37a so as to face the liner ring 50 of the front partition wall 26.
  • a thrust bearing 38 that is in pinpoint contact with the distal end portion of the support shaft 39 is provided!
  • a predetermined annular gap is formed between the liner ring 50 and the mouth ring 51 in a state where the thrust bearing 38 is in contact with the front end surface of the support shaft 39.
  • the drive rotator 33 includes a cylindrical rotator 33a and a drive magnet 42 embedded on the inner peripheral side thereof.
  • a rotating shaft of the motor 34 is fixed to the rear side surface of the driving rotating body 33.
  • the drive magnet 42 is magnetically coupled to the driven magnet 41 via the rear partition wall 27 and rotationally drives the driven magnet 41 by the rotational driving force from the motor 34.
  • a transfer fluid serving as priming water is introduced from the liquid supply hole 3b of the first casing 3, and the suction fluid 7, the first casing 3, and the second casing 4 are filled with the transfer fluid. .
  • the liquid level of the transfer fluid in the first casing 3 is equal to the height of the lowest point of the suction port 3a and is filled with gas.
  • the transfer fluid and gas thus transferred from the first tank chamber 9 to the second tank chamber 20 repeat gas-liquid separation on the liquid surface of the second tank chamber 20, and the separated gas is discharged from the discharge port. It is discharged from 4a to the discharge side.
  • the impeller Since no directional force or radial thrust is generated on the front side of 29, but on the contrary, directional force or axial thrust is generated on the rear side, the impeller 29 moves back to the position where the thrust bearing 38 contacts the tip surface of the support shaft 38.
  • the largest annular gap is formed between the inlet of the front partition and the opening of the impeller. As a result, the liquid containing some bubbles in the pump chamber 28 tries to flow back to the inlet 26c side where the degree of vacuum is increased through the annular gap.
  • a backflow preventing projection 37b is formed at the tip of the impeller 29 so as to cover the annular gap from the inner peripheral side in a non-contact manner, the projection 37b is free from labyrinth against the fluid to flow back. As a result, the backflow is limited.
  • Table 1 shows the self-priming operation time of the conventional pump and the pump according to the first embodiment of the present invention when the suction height is 4 m.
  • the pump according to the first embodiment of the present invention has a labyrinth structure, so that it is 13.40% in the first test, and 20.45% in the second and third tests.
  • the suction operation time has been shortened.
  • FIG. 3 is an enlarged sectional view of the self-priming pump according to the second embodiment of the present invention. Since the configuration other than the shape of the impeller is the same as that of the first embodiment, description thereof is omitted.
  • the annular gap between the front partition wall 26 and the impeller 29 is covered from the inner peripheral side. Only the backflow prevention projection 37b is formed, but in the second embodiment, the backflow prevention projection 37Ab that covers the annular gap from the inner peripheral side and the backflow prevention valve 37Ac that covers the outer peripheral side are provided. It is provided on the impeller 29 side.
  • a ring-shaped first backflow prevention protrusion 37Ab protruding toward the front partition wall 26 is formed at the edge of the opening 37Aa of the cover member 37A of the impeller 29A.
  • a ring-shaped backflow prevention protrusion 29Ab protruding toward the front partition wall 26 is formed through the mouth ring 51 lowered to the front. That is, the backflow prevention protrusions 29Ab and 29Ac are formed in a double manner through the mouth ring 51.
  • a liner ring 50 protruding from the mating front partition wall 26 is disposed via a predetermined gap.
  • the annular clearance between the backflow preventing protrusions 29Ab and 29Ac and the liner ring 50 is formed in a multi-stage crank shape.
  • FIG. 4 is an enlarged cross-sectional view of a self-priming pump according to the third embodiment of the present invention.
  • the description is abbreviate
  • the backflow prevention protrusion that is integrally formed on the impeller 29 side in the first embodiment is arranged on the front partition wall 26B side.
  • the front partition wall 26B includes a cylindrical portion 26Ba and a multi-stage disk portion 26Bb that is connected to the opening end and has a diameter that increases toward the rear side.
  • a ring-shaped backflow preventing projection 26Bc protruding to the rear side is formed on the inner diameter of the disc portion 26Bb.
  • the backflow prevention protrusion 26Bc is arranged so as to be inserted into the inner peripheral side of the mouth ring 51 provided on the other impeller 29B through a predetermined gap.
  • the impeller 29B is provided with a backflow prevention protrusion.
  • FIG. 5 is an enlarged cross-sectional view of a self-priming pump according to the fourth embodiment of the present invention.
  • the force in which only the backflow prevention projection 26Bc that covers the annular gap between the front partition wall 26B and the impeller 29B from the inner peripheral side is formed is formed in the front partition wall 29C in the fourth embodiment.
  • a backflow prevention projection 26Cc covering the inner periphery of the annular gap between the front partition wall 26B and the impeller 29B and a backflow prevention projection 29Cd covering the outer periphery are provided.
  • the front partition wall 26C includes a cylindrical portion 26Ca and a multi-stage disk portion 26Cb that is connected to the opening end and has a diameter that increases toward the rear side.
  • a ring-shaped first backflow prevention protrusion 26Cc protruding to the rear side is formed on the inner diameter of the disk part 26Cb, and a liner ring 50 is interposed on the outer periphery of the first backflow prevention protrusion 26Cc.
  • a ring-shaped second backflow prevention protrusion 26Cd is formed to protrude rearward. Between the first backflow prevention projection 26Cc and the second backflow prevention projection 26Cd protruding to the rear side, a mouth ring 50 protruding from the other impeller 29 is interposed. Therefore, a multi-stage labyrinth structure is formed between the first backflow prevention protrusion 26Cc, the second backflow prevention protrusion 26Cd, and the mouth ring 50.
  • the effect of the present invention can be achieved even if a plurality of backflow preventing protrusions are provided on the front partition wall side.
  • FIG. 6 is an enlarged cross-sectional view of a self-priming pump according to a fifth embodiment of the present invention. Since the configuration is the same as that of the first embodiment except for the shape of the front partition wall, description thereof is omitted.
  • the backflow prevention protrusion 29b is formed on the impeller 29 side, but in the fifth embodiment, in addition to the backflow prevention protrusion 29a provided on the impeller 29 side, Further, a backflow preventing projection 26Dc is formed on the front partition wall 26D side. Since the configuration of the impeller 29 is the same as that of the first embodiment, the description thereof is omitted.
  • the front partition wall 26D includes a cylindrical portion 26Da and a plurality of stages of disk portions 26Db connected to the rear side of the cylindrical portion 26Da.
  • a liner ring 50 is provided on the inner diameter of the disk portion 26Db.
  • a ring-shaped backflow prevention protrusion 26Dc protruding to the rear side is formed.
  • the number of backflow prevention protrusions provided in the above embodiment is not limited to one or two, but any number of backflow prevention protrusions may be provided on the front partition wall side or impeller side. It can be formed in at least one.
  • the backflow preventing protrusion may be configured to be attached with another member that is not necessarily formed integrally with the front partition wall and the impeller.
  • the shape of the backflow prevention protrusion is not necessarily required to be formed in a ring shape, so long as it forms a labyrinth structure in the annular gap between the front partition wall and the impeller. Also good.
  • a pump having a structure in which the driven rotator 30 rotates with respect to the support shaft 39 is applied to the pump having a rotating shaft that integrally rotates with the force driven rotator to which the present invention is applied. Is also applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une pompe à aspiration automatique capable de décharger de manière stable du fluide à transférer même si le fluide devient un mélange de gaz et de liquide. Une bague de garniture (50), qui est en contact par frottement avec une hélice (29) lorsqu'elle se déplace vers le côté avant pendant sa rotation, est disposée au niveau d'une section de plaque circulaire (26b), à une position sur le côté arrière de sa partie la plus interne. Dans un élément de couverture (37) de l'hélice (29) occupant une position faisant face à une cloison de séparation avant (26), une partie centrale (37a) d'une plaque circulaire présente une ouverture ayant sensiblement la même taille qu'une ouverture de la section de tube circulaire (26a) de la cloison de séparation avant (26). Le bord (37a) de l'ouverture de la plaque circulaire est de forme annulaire pour faire saillie vers le côté de la cloison de séparation avant (26). Une projection empêchant tout refoulement (37a) est insérée à l'intérieur de la bague de garniture (50) de la cloison de séparation avant (26) avec un jeu prédéterminé entre la projection (37a) et la bague de garniture (50). Une bague d'embouchure (51), établissant un contact par frottement avec la bague de garniture (50) lorsque l'hélice (29) se déplace vers le côté avant, est disposée sur l'élément de couverture (37), en une position faisant face à la garniture (50).
PCT/JP2007/064256 2006-08-23 2007-07-19 pompe à aspiration automatique WO2008023515A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006226059A JP2008050958A (ja) 2006-08-23 2006-08-23 自吸式ポンプ
JP2006-226059 2006-08-23

Publications (1)

Publication Number Publication Date
WO2008023515A1 true WO2008023515A1 (fr) 2008-02-28

Family

ID=39106606

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/064256 WO2008023515A1 (fr) 2006-08-23 2007-07-19 pompe à aspiration automatique

Country Status (3)

Country Link
JP (1) JP2008050958A (fr)
TW (1) TW200829797A (fr)
WO (1) WO2008023515A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102116312A (zh) * 2011-03-09 2011-07-06 浙江新界泵业股份有限公司 用于离心泵的叶轮
CN103133353A (zh) * 2013-03-12 2013-06-05 孙九江 自吸式离心泵
CN105298857A (zh) * 2015-11-19 2016-02-03 江苏大学 一种大流量自吸离心泵自吸系统的逆止阀
CN114658665A (zh) * 2022-04-26 2022-06-24 新界泵业(浙江)有限公司 一种防腐外混式自吸泵
CN117028264A (zh) * 2023-10-09 2023-11-10 烟台万瓷新材料科技有限公司 一种防空转螺旋离心泵及其使用方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4954269B2 (ja) * 2009-11-25 2012-06-13 三菱電機株式会社 ポンプ及びヒートポンプ式給湯装置
JP2014194189A (ja) * 2013-03-29 2014-10-09 Panasonic Corp ポンプ
JP6117658B2 (ja) 2013-09-06 2017-04-19 本田技研工業株式会社 遠心ポンプ
JP7187170B2 (ja) * 2018-04-23 2022-12-12 株式会社川本製作所 インペラ、及び自吸式ポンプ装置
JP7124422B2 (ja) * 2018-04-27 2022-08-24 株式会社アイシン ポンプ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6436599U (fr) * 1987-08-27 1989-03-06
JPH08121384A (ja) * 1994-03-16 1996-05-14 Itt Flygt Ab 逆流を減少させるための装置
JP2632132B2 (ja) * 1994-04-22 1997-07-23 株式会社イワキ マグネットポンプにおけるリアスラスト軸受の構造
JP2000227086A (ja) * 1999-02-04 2000-08-15 Matsushita Electric Ind Co Ltd 自吸式ポンプ
JP2002257081A (ja) * 2001-02-26 2002-09-11 Terada Pump Seisakusho:Kk うず巻きポンプの漏れ止め装置
JP3499743B2 (ja) * 1998-04-17 2004-02-23 株式会社三協精機製作所 自吸式ポンプ
JP2005048675A (ja) * 2003-07-29 2005-02-24 Nidec Shibaura Corp 自吸式ポンプ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6436599U (fr) * 1987-08-27 1989-03-06
JPH08121384A (ja) * 1994-03-16 1996-05-14 Itt Flygt Ab 逆流を減少させるための装置
JP2632132B2 (ja) * 1994-04-22 1997-07-23 株式会社イワキ マグネットポンプにおけるリアスラスト軸受の構造
JP3499743B2 (ja) * 1998-04-17 2004-02-23 株式会社三協精機製作所 自吸式ポンプ
JP2000227086A (ja) * 1999-02-04 2000-08-15 Matsushita Electric Ind Co Ltd 自吸式ポンプ
JP2002257081A (ja) * 2001-02-26 2002-09-11 Terada Pump Seisakusho:Kk うず巻きポンプの漏れ止め装置
JP2005048675A (ja) * 2003-07-29 2005-02-24 Nidec Shibaura Corp 自吸式ポンプ

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102116312A (zh) * 2011-03-09 2011-07-06 浙江新界泵业股份有限公司 用于离心泵的叶轮
CN103133353A (zh) * 2013-03-12 2013-06-05 孙九江 自吸式离心泵
CN103133353B (zh) * 2013-03-12 2015-05-06 孙九江 自吸式离心泵
CN105298857A (zh) * 2015-11-19 2016-02-03 江苏大学 一种大流量自吸离心泵自吸系统的逆止阀
CN114658665A (zh) * 2022-04-26 2022-06-24 新界泵业(浙江)有限公司 一种防腐外混式自吸泵
CN114658665B (zh) * 2022-04-26 2023-08-04 新界泵业(浙江)有限公司 一种防腐外混式自吸泵
CN117028264A (zh) * 2023-10-09 2023-11-10 烟台万瓷新材料科技有限公司 一种防空转螺旋离心泵及其使用方法
CN117028264B (zh) * 2023-10-09 2023-12-19 烟台万瓷新材料科技有限公司 一种防空转螺旋离心泵及其使用方法

Also Published As

Publication number Publication date
JP2008050958A (ja) 2008-03-06
TW200829797A (en) 2008-07-16

Similar Documents

Publication Publication Date Title
WO2008023515A1 (fr) pompe à aspiration automatique
TWI499724B (zh) Drainage pump
US9239056B2 (en) Pump impeller and submersible pump having such pump impeller
JP2008524486A (ja) ベーンポンプ
US20070201994A1 (en) Submersible pump
KR101694847B1 (ko) 스프르트 펌프
JP2015140701A (ja) 自吸式ポンプ
JP2007113500A (ja) 排水ポンプ
CN111997907B (zh) 立式导叶式自吸离心泵
KR100540381B1 (ko) 자흡식 펌프용 임펠러
KR101898504B1 (ko) 양흡입형 임펠러를 구비한 스프르트 펌프
JP3996121B2 (ja) 排水ポンプ
JP4159733B2 (ja) 自吸式ポンプ装置
JPH10115294A (ja) 排水ポンプ
JPH0979171A (ja) 排水ポンプ
JP2019190338A (ja) 自吸式ポンプ
EP1972790A1 (fr) Pompe à fluides
JPH10227291A (ja) 自吸式ポンプ
JP2561445Y2 (ja) ポンプ装置
JP5070099B2 (ja) 水中ポンプ
JP2004150390A (ja) 水中ポンプ
JP2002349469A (ja) ポンプ及び該ポンプを用いたポンプシステム
KR19980072139A (ko) 원심펌프
KR200416847Y1 (ko) 스크루 펌프
JP2024081323A (ja) ポンプ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07791010

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07791010

Country of ref document: EP

Kind code of ref document: A1