WO2021028246A1 - Abstreifelement für laufradeintrittskanten von abwasserpumpen - Google Patents
Abstreifelement für laufradeintrittskanten von abwasserpumpen Download PDFInfo
- Publication number
- WO2021028246A1 WO2021028246A1 PCT/EP2020/071792 EP2020071792W WO2021028246A1 WO 2021028246 A1 WO2021028246 A1 WO 2021028246A1 EP 2020071792 W EP2020071792 W EP 2020071792W WO 2021028246 A1 WO2021028246 A1 WO 2021028246A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- finger
- impeller
- rotation
- angle
- axis
- Prior art date
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 14
- 239000010865 sewage Substances 0.000 claims description 21
- 230000007704 transition Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 6
- 239000002657 fibrous material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- -1 hygiene articles Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
Definitions
- the invention relates to a sewage pump with a spiral housing with an inlet opening and an impeller with at least one blade, the leading edge assigned to the respective blade extending outwardly curved backwards from the impeller hub
- Wastewater can contain different types of solids such as fibrous matter, the amount and structure of which can depend on the source of the sewage as well as the season. For example, plastics, hygiene articles, textiles, etc. are common in cities, while wear particles can be contained in industrial areas.
- fibrous materials such as rags, cloths and the like, which stick to the leading edges of the blades and can wrap themselves around the impeller hub. Such incidents lead to frequent service intervals and a reduced efficiency of the pump.
- the starting point for the invention is a sewage pump for pumping solid-laden sewage.
- the sewage pump consists of an impeller with at least one backward-curved impeller blade.
- the impeller is non-rotatably connected to a rotating shaft and sits in a spiral pump housing with an inlet opening.
- the inlet opening can be axially aligned and / or cylindrical.
- the leading edge of the at least one impeller blade extends radially outward from the impeller hub with the aforementioned backward curved blade shape.
- a finger is firmly connected to the pump housing on the inner wall of the inlet opening. In the transition area of the finger to the inner wall of the inlet port includes a groove to "formed in the suction side wall of the pump housing and extends in the radial and tangential directions in the pump housing wall to the outside.
- the finger extends radially inward from the inlet inner wall toward the axis of rotation of the impeller.
- An upper finger surface facing the leading edge runs at a defined distance from the leading edge and essentially parallel to the leading edge, so that the desired wiping effect results from the upper finger surface facing the leading edge or the lateral contact surface of the finger.
- the interaction of the backward curved leading edge and the fingers facilitates the removal of solids stuck on the leading edge of the impeller.
- the deposited solids are fed into the groove and conveyed by the rotational movement of the impeller » so that they reach the area of the housing pressure connection via the groove.
- the impeller and the finger are specially matched to one another for this task.
- the impeller leading edge to the vertical projection surface of the axis of rotation of the impeller at an angle ⁇ of 5 ° to 75 °. is. This has the effect that, in addition to the rotational movement and the resulting radial force, an axial component also comes into play on the solids in order to scrape off the solids. This optimizes the removal of the stripped solids through the groove.
- the angle ⁇ can preferably be in a value range between 10 ° to 45 °.
- the upper finger surface of the finger can also be inclined to the same extent by the angle ⁇ with respect to the vertical projection surface.
- the upper finger surface and the entry edge do not necessarily have to run exactly parallel, so that deviating angles a to the projection surface are also conceivable here, in particular, it can be provided that the upper finger surface is not made planar, but instead is curved, so that a varying Angle ⁇ for the finger surface and consequently also a varying distance between the leading edge and the upper finger surface can result.
- the upper finger surface can preferably provide a curvature both in the radial and in the tangential direction. Ideally, the upper finger surface has a cone-like curvature in the radial and tangential directions.
- the sewage pump can be operated dry or submerged in the pumping medium in any orientation.
- the volute casing of the pump has a spur and a pressure port.
- the pump housing can have a separate housing insert in the area of the inlet opening, such as, for example, a suction cover or a wear wall, into which the aforementioned groove can be introduced or the finger can be attached to it.
- the leading edge of the at least one blade moves at an angle ß to the lateral contact surface of the finger past the upper finger surface.
- this angle ⁇ should be around 90 ° in order to achieve an optimal wiping effect.
- the angle! Increase ß in the radial direction outwards.
- the angle ß should also increase.
- the radius r suction corresponds to the radius of the cylindrical inlet opening of the housing.
- the angle can vary essentially uniformly between the aforementioned support points; ideally, the angle between the support points should increase steadily.
- the upper finger surface of the finger has a distance of 0.05 to 3 mm from the leading edge of the blade, at least in some areas. This ensures that the solids are optimally stripped off the impeller leading edge. If the distance chosen is too large, there is a risk that small solids and fibers will not be caught by the scraper finger.
- the lateral contact surface of the finger or a tangent to the contact surface in relation to the tangential course of the groove should have a (tangential) angle d with a value between 120 ° and 180 °, preferably between 140 ° and 180 ° and particularly preferably a value have between 160 ° and 180 °.
- the rule here is that with increasing angle d, the removal of the stripped solids into the groove is made easier. An angle d of 180 ° would be ideal.
- the finger In order to influence the flow in the inlet of the impeller as little as possible, the finger should have a flow-favorable shape. Good properties are achieved if the finger is designed as a three-surface pyramid with curved side surfaces.
- the front surface ie the contact surface of the finger
- the rear surface of the finger is less critical and, if necessary, can also be more inclined to the parallel.
- the rear surface is designed to be doubly curved, in particular designed to be doubly curved in different directions. This also reduces the area of the finger that influences the flow.
- the orientation and the specific arrangement of the finger within the inlet are decisive for the efficiency of the wiping action.
- the position of the finger relative to the spur of the spiral housing and consequently to the pressure port is relevant. It is advantageous if the finger is arranged in the vicinity of the spur, preferably after the spur in the direction of rotation. Such an arrangement has a further advantage, particularly in the case of horizontally standing pumps. Solids such as stones can possibly collect in the lower part of the pump housing or impeller. By arranging the finger 30 in the vicinity of the spur, the latter is positioned outside this danger point.
- the exact position of the finger can be determined by the angle f, for example.
- the angle f corresponds to the wrap angle which is defined by the angle of intersection between the vertical and a tangent of the contact surface of the finger that intersects the axis of rotation of the impeller, the tangent preferably being defined by the point of contact that is farthest away from the axis of rotation in the radial direction. handle surface runs.
- Possible angular values of the angle f are 0 ° to 45 °, preferably between 15 ° to 35 ° and ideally between 20 ° and 30 °.
- the selected finger length corresponds to at least 30% of the total radius r sa micrograms of the cylindrical inlet opening, preferably at least 50% and ideally between 70% to 80%.
- the finger provides at least one section designed as a cutting edge, in particular on the side of the front attachment Gripping surface of the finger, the cutting edge however extending perpendicular to the stripping edge, ie parallel to the axis of rotation.
- the cutting edge is preferably provided in the transition area of the finger to the fastening element of the finger. More . Advantages and properties of the invention result from the exemplary embodiment shown in the figures. Show it:
- FIG. 1 a perspective view of the sewage pump according to the invention with the pump housing open
- Figure 2 a vertical section through the sewage pump according to the invention
- Figure 3a, 3b a detailed view of the housing insert with scraper finger for the waste water pump according to the invention
- FIG. 4 a detailed view of the impeller of the wastewater pump according to the invention
- FIGS. 5a to 5d Detailed views of the stripping finger of the wastewater pump according to the invention
- FIG. 6 a suction-side view of the housing insert of the wastewater pump according to the invention with an inserted impeller.
- FIG. 7a, 7b sectional views along the axis of rotation R through the housing insert including the impeller according to FIG.
- FIG. 8 a detailed view of the scraper finger together with the groove according to FIGS. 6 and
- FIG. 9 a diagram of the normalized radius (rr suction ) versus the angle ⁇ .
- FIG. 1 shows an exploded view of the wastewater pump 1 according to the invention. This consists of a spiral housing 10, a housing insert on the suction side in the form of a wear wall 12 and the impeller 20 rotating about the axis of rotation R. The direction of rotation is identified by the reference number 2.
- the impeller 20, shown in detail in FIG. 4, comprises two backward curved blades 21a, 21b, through which the conveying medium is sucked in via the cylindrical inlet opening 15 of the wear wall 12 and conveyed via the conveying chamber 16 of the spiral housing 10 to the pressure port 13 and via this is given.
- the wastewater to be pumped can be mixed with a large number of different solids, for example fibrous materials that can adhere to certain parts of the pump while the pump is in operation.
- the scraper finger 30 according to the invention is provided, which is fastened to the cylindrical inner wall of the inlet 15 and extends in the direction of the axis of rotation R.
- the exemplary embodiment shown in the figures has a separate wear wall 12, but for the implementation of the invention the wear wall 12 could just as well be dispensed with and the finger 30 attached directly to the housing wall in the area of the suction mouth .
- the design and functioning of the finger 30 will be discussed in greater detail later; first, the construction of the impeller 20 will be described.
- the course of the leading edges 23 of the blades 21a, 21b shown in FIG. 4 is characteristic of the impeller 20. These begin directly at the impeller hub 22, in particular at the level of the upper, free hub end and extend radially outward, curved backwards .
- the end faces of the blades 21a, 21b which are directed towards the suction cover and which extend through the inlet 15 are referred to as inlet edges 23.
- leading edges 23 are also aligned at a defined angle ⁇ to the perpendicular projection surface of the axis of rotation R.
- FIGS. 7a, 7b show a sectional view through the impeller 20 and the corresponding wear wall 12.
- the angle a is drawn in here the leading edge 23 of the impeller 20 with respect to the horizontal, which corresponds to a projection surface perpendicular to the axis of rotation R in the chosen form of representation.
- the selected inclination makes it possible, in addition to the radial force, to apply an additional axial force component to the conveying medium, which optimizes the release of the solids contained therein, which have been captured and stripped off by the finger 30.
- the angle a should be in the range between 5 ° and 75 ° or 10 ° to 45 °. In the exemplary embodiment shown here, an angle of inclination ⁇ of approximately 25 ° is assumed (see FIGS. 7a, 7b).
- the scraper finger 30 is mounted on the inner wall of the inlet 15 of the wear wall and extends in the direction of the axis of rotation R.
- the length of the scraper finger 30 should be at least 30%, preferably at least 50% or at best approx. 70% to 80% of the length Radius of the cylindrical inlet 15, which is hereinafter referred to as rsaug.
- the finger 30 is shaped like a pyramid with a total of three side surfaces 33, 35a, 35b and the base surface resting on the inner wall of the inlet 15, The upper finger surface 33 facing the leading edges 23 of the impeller 20
- the other side surfaces ie the lateral contact surface 35a as well as the rear side surface 35b, also have corresponding curvatures, the rear side surface 35b even providing a double curvature in different directions. Compare in particular FIG. 5c.
- the front contact surface 35a of the Finger 30 inclined at an angle g of 0 ° to 30 ° to the axis of rotation R.
- the angle g to a parallel line P1 of the axis of rotation R is drawn.
- the rear surface 35b of the finger 30 is less critical and can be inclined at an angle e with respect to the axis of rotation R or the parallel line P2 to the axis of rotation R of 0 ° by 50 °.
- the surface 35c can be rounded tangential to the adjoining surfaces 35a » 35b. When this angle definition is taken into account, it is very difficult for solids to adhere to the finger 30.
- Impeller 20 When the impeller 20 rotates about the axis of rotation R in direction 2, the entry edges 23 of the impeller 20 run towards the lateral contact surface 35 a and then move past the opposite finger surface 33.
- the transition edge between the lateral contact surface 35a and the upper surface 33 forms the so-called wiping edge, through which solids deposited on the leading edges are wiped off and, due to the radial and axial speed of the conveying medium, are released into the spiral-shaped groove 11, via which they ultimately arrive Impeller 20 can be ejected past through the delivery chamber 16 to the pressure port 13.
- the distance between the leading edge 23 and the surface 33 or the wiping edge of the wiping finger 30 should be in a range between 0.05 to 3 mm, this distance being able to vary in the radial direction, but should remain within the aforementioned value interval if possible. If the distance chosen is too large, there is the risk that small solids cannot be picked up by the scraper finger 30, whereas a distance chosen too small increases the risk of the scraper finger 30 and the entry edge 23 running into it.
- the relative position of the stripping finger 30 to the spur 17 of the spiral housing 10 also influences the delivery of the stripped solids to the pressure nozzle 13.
- the stripping finger 30, as in the sectional view 2, in the direction of rotation 2, ie clockwise in the illustration of FIG. 2, lies directly behind the spur 17. Solids such as stones can possibly collect in the lower part of the pump housing or impeller.
- the relative position of the stripping finger 30 to the spur 17 can be defined by the angle f shown in FIG. 2.
- the angle cp corresponds to the wrap angle, which is defined by the angle of intersection between the perpendicular and the straight line G1.
- the straight line G1 is perpendicular to the axis of rotation R and runs through the point of the lateral contact surface 35a of the scraper finger 30 furthest in the radial direction from the axis of rotation R.
- Recommended values for the angle f are in the range between 0 ° to 45 °, with a Has turned out angles of 20 ° to 30 ° to be particularly advantageous.
- the leading edge 23 of the blades 21a, 21b moves past the upper surface 33.
- the tangent at the lowest point of the upper surface 33 (point of the smallest distance to the leading edge 23) forms the angle ⁇ with the tangent of the leading edge.
- the angle ⁇ should be approximately 90 °.
- the angle ⁇ can also increase as the radius r increases, starting from the impeller hub 22. This means that as the radius r increases, the angle ⁇ also increases.
- the normalized radius (r- rsaug), where rsaug represents the radius of the inlet 15, can be used to assume the course shown in FIG.
- the angle ⁇ near the center of the impeller 20 can be between 50 ° and 120 ° and at the outer edge is between 85 ° and 160 °.
- the angle course can be freely selected within this range, but ideally a steadily increasing angle ⁇ should be selected.
- the lateral contact surface 35a of the finger 30 should also assume an angle d between 180 ° to 120 ° in relation to the tangential course of the groove 11. This angle d is illustrated in FIG. 3 and has the value there approximately 165 °.
- the finger 30 can be designed with a cutting edge 32 which extends perpendicular to the surface 33 of the finger in the area of the transition to the fastening element 31. Accordingly, the cutting edge runs almost parallel to the axis of rotation R.
- the stripping finger 30 can be detachably connected to the wear wall 12 or the housing 10, whereby it must be ensured that the fastening element 31 does not protrude into the inlet 15 in order to avoid any influence on the flow properties within the pump.
- FIG. 9 shows the angular profile ⁇ between the running leading edge 23 of the running wheel 20 and the finger 30.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202080057382.5A CN114245849A (zh) | 2019-08-15 | 2020-08-03 | 用于污水泵的叶轮进口边缘的刮除元件 |
US17/635,236 US20220290695A1 (en) | 2019-08-15 | 2020-08-03 | Wiping Element for Impeller Leading Edges of Wastewater Pumps |
CA3149426A CA3149426A1 (en) | 2019-08-15 | 2020-08-03 | Wiping element for impeller leading edges of wastewater pumps |
BR112022002294A BR112022002294A2 (pt) | 2019-08-15 | 2020-08-03 | Bomba de águas residuais para transportar águas residuais carregadas de sólidos |
AU2020327570A AU2020327570A1 (en) | 2019-08-15 | 2020-08-03 | Wiping element for impeller leading edges of wastewater pumps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19191970.3A EP3779201B1 (de) | 2019-08-15 | 2019-08-15 | Abstreifelement für laufradeintrittskanten von abwasserpumpen |
EP19191970.3 | 2019-08-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021028246A1 true WO2021028246A1 (de) | 2021-02-18 |
Family
ID=67659004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/071792 WO2021028246A1 (de) | 2019-08-15 | 2020-08-03 | Abstreifelement für laufradeintrittskanten von abwasserpumpen |
Country Status (8)
Country | Link |
---|---|
US (1) | US20220290695A1 (de) |
EP (1) | EP3779201B1 (de) |
CN (1) | CN114245849A (de) |
AU (1) | AU2020327570A1 (de) |
BR (1) | BR112022002294A2 (de) |
CA (1) | CA3149426A1 (de) |
HU (1) | HUE062508T2 (de) |
WO (1) | WO2021028246A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023057236A1 (de) | 2021-10-04 | 2023-04-13 | KSB SE & Co. KGaA | Kreiselpumpe mit verschleissbeständiger schleisswand mit abstreifelement |
DE102022124356A1 (de) | 2021-10-04 | 2023-05-25 | KSB SE & Co. KGaA | Kreiselpumpe mit verschleißbeständiger Schleißwand mit Abstreifelementrschleißbeständiger Schleißwand mit Abstreifelement |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3988793A1 (de) * | 2020-10-26 | 2022-04-27 | Xylem Europe GmbH | Laufradsitz mit einem führungszapfen für eine pumpe |
EP4102080A1 (de) * | 2021-06-08 | 2022-12-14 | Xylem Europe GmbH | Pumpe und hydraulikeinheit einer pumpe |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4604035A (en) * | 1985-01-02 | 1986-08-05 | A. O. Smith Harvestore Products, Inc. | Submersible pump having frangible drive connection |
US6190121B1 (en) * | 1999-02-12 | 2001-02-20 | Hayward Gordon Limited | Centrifugal pump with solids cutting action |
US20030215331A1 (en) * | 2002-04-26 | 2003-11-20 | Patrik Andersson | Rotary pump for pumping fluids, mainly sewage water |
US20090123270A1 (en) * | 2005-07-01 | 2009-05-14 | Itt Manufacturing Enterprises Inc. | Pump |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3096718A (en) * | 1961-12-12 | 1963-07-09 | Conard Kenner | Trash cutter for a pump |
AT255912B (de) * | 1964-07-01 | 1967-07-25 | Schlesiger & Co Kg Feluwa | Schmutzwasser-Kreiselpumpe |
JP4326616B2 (ja) * | 1999-01-11 | 2009-09-09 | 株式会社鶴見製作所 | 繊維状、紐状異物を含む汚水汚物中で使用されるボルテックス型遠心ポンプにおける羽根車入口部の閉塞防止装置 |
DE102004058458B3 (de) * | 2004-12-03 | 2006-05-18 | Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg | Pumpe mit Schneidlaufrad |
SE0501382L (sv) * | 2005-06-17 | 2006-06-13 | Itt Mfg Enterprises Inc | Pump för pumpning av förorenad vätska |
SE530785C2 (sv) * | 2006-01-23 | 2008-09-09 | Itt Mfg Enterprises Inc | Pump för pumpning av förorenad vätska innefattande fast material |
WO2014029790A1 (de) * | 2012-08-23 | 2014-02-27 | Sulzer Pumpen Ag | Pumpe zum fördern von abwasser sowie laufrad und bodenplatte für eine solche |
SE539558C2 (sv) * | 2013-08-15 | 2017-10-10 | Xylem Ip Man S À R L | Pump för pumpning av vätska samt pumphjulssammansättning |
JP6415116B2 (ja) * | 2014-05-30 | 2018-10-31 | 株式会社荏原製作所 | 汚水ポンプ用のケーシングライナ及びこれを備えた汚水ポンプ |
DK3276177T3 (da) * | 2015-03-27 | 2021-01-18 | Ebara Corp | Spiralhuspumpe |
-
2019
- 2019-08-15 EP EP19191970.3A patent/EP3779201B1/de active Active
- 2019-08-15 HU HUE19191970A patent/HUE062508T2/hu unknown
-
2020
- 2020-08-03 AU AU2020327570A patent/AU2020327570A1/en active Pending
- 2020-08-03 US US17/635,236 patent/US20220290695A1/en active Pending
- 2020-08-03 CA CA3149426A patent/CA3149426A1/en active Pending
- 2020-08-03 WO PCT/EP2020/071792 patent/WO2021028246A1/de active Application Filing
- 2020-08-03 BR BR112022002294A patent/BR112022002294A2/pt unknown
- 2020-08-03 CN CN202080057382.5A patent/CN114245849A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4604035A (en) * | 1985-01-02 | 1986-08-05 | A. O. Smith Harvestore Products, Inc. | Submersible pump having frangible drive connection |
US6190121B1 (en) * | 1999-02-12 | 2001-02-20 | Hayward Gordon Limited | Centrifugal pump with solids cutting action |
US20030215331A1 (en) * | 2002-04-26 | 2003-11-20 | Patrik Andersson | Rotary pump for pumping fluids, mainly sewage water |
US20090123270A1 (en) * | 2005-07-01 | 2009-05-14 | Itt Manufacturing Enterprises Inc. | Pump |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023057236A1 (de) | 2021-10-04 | 2023-04-13 | KSB SE & Co. KGaA | Kreiselpumpe mit verschleissbeständiger schleisswand mit abstreifelement |
DE102022124356A1 (de) | 2021-10-04 | 2023-05-25 | KSB SE & Co. KGaA | Kreiselpumpe mit verschleißbeständiger Schleißwand mit Abstreifelementrschleißbeständiger Schleißwand mit Abstreifelement |
Also Published As
Publication number | Publication date |
---|---|
EP3779201A1 (de) | 2021-02-17 |
BR112022002294A2 (pt) | 2022-04-26 |
HUE062508T2 (hu) | 2023-11-28 |
US20220290695A1 (en) | 2022-09-15 |
AU2020327570A1 (en) | 2022-02-17 |
EP3779201C0 (de) | 2023-06-07 |
CA3149426A1 (en) | 2021-02-18 |
CN114245849A (zh) | 2022-03-25 |
EP3779201B1 (de) | 2023-06-07 |
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