EP2609334A1 - Gartenpumpe - Google Patents
GartenpumpeInfo
- Publication number
- EP2609334A1 EP2609334A1 EP10747851.3A EP10747851A EP2609334A1 EP 2609334 A1 EP2609334 A1 EP 2609334A1 EP 10747851 A EP10747851 A EP 10747851A EP 2609334 A1 EP2609334 A1 EP 2609334A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- chamber
- pump
- water
- garden
- 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.)
- Granted
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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- 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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted 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
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
- F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type
Definitions
- the invention relates to a garden pump with anti-freeze devices.
- a garden pump can be damaged in case of incomplete emptying and improper storage in winter, that the water contained in the pump freezes and the resulting increase in volume by about 10% damage parts of the pump, in particular, the breaking of wall parts is a frequent loss.
- EP 1 554 497 B1 a submersible motor pump is described, in which a ceramic drive shaft is protected against damage during freezing of the water in the pump housing by different, delimited against the impeller chamber cavities of the housing are filled with a closed-cell foam.
- the cavities are connected via narrow channels or slots with the impeller chamber, so that when pressure is increased by freezing water can escape through the channels into the cavities.
- US 2007/006531 6 A1 is provided as antifreeze, that in a housing part, a chamber is filled with closed-cell foam and is open to the water contained area of the pump housing.
- a compensation volume against freezing pressure is provided by a piston displaceable counter to a spring force.
- JP 541 1 6709 A2 an air-filled chamber is provided as a compensation volume.
- JP 1200092 A discloses a flexible membrane relative to a housing wall displaceable under pressure to limit overpressure in the freezing of water in a pump chamber.
- the present invention has for its object to provide a garden pump with further improved protection against damage caused by freezing water in the pump damage.
- the invention advantageously takes into account the particular behaviors involved in the construction of garden pumps with impeller assemblies when freezing water present in the interior of the pump.
- the invention avoids the need for the impeller assembly to be needed as a spreading path for water displaced by ice formation.
- the main flow direction within the pump is the flow path from the pump inlet through the impeller assembly to the pump outlet, with a prechamber upstream and a pressure chamber downstream of the impeller assembly.
- the pressure chamber is typically geometrically branched and may surround the impeller assembly and / or the prechamber.
- the pre-chamber is assigned as antifreeze compensating volume on a side facing away from the pre-chamber outside of the antechamber bounding partition.
- the water-conducting connection between the prechamber and the associated compensating volume is given by an opening in the partition whose diameter can be kept so small that the disturbance of the essential for the nozzle effect wall shape remains negligible.
- the cross-sectional area of the opening is advantageously less than 50 mm 2 , in particular less than 25 mm 2 , preferably less than 15 mm 2 .
- the cross section of the opening is at least 5 mm 2 .
- the equalization volume associated with the prechamber is also advantageously connected to the pressure chamber of the pump, the opening being sealed against the passage of water during pump operation from the pressure chamber through the opening into the prechamber.
- the seal can be given by a valve, in particular a flap valve.
- the seal in pump operation can be given by an elastic body, which forms the compensation volume associated with the prechamber, being pressed by the water pressure in the pressure chamber against the side of the partition wall facing away from the prechamber. At standstill of the pump, the water pressure between all subspaces is balanced, as long as flow paths within the subspaces and between them are not blocked by ice formation.
- each can advantageously be provided in at least one of the impeller chambers, preferably in several or all impeller chambers Compensation volume are provided.
- the compensation volumes can be formed in a preferred embodiment by elastically compressible body with gas inclusions.
- such elastically compressible bodies can be present as castings which can be produced in molds, which can thereby be produced in a shape adapted to the geometry of the internal structures of the pump.
- the gas inclusions are provided by so-called expanded microspheres, which have a tensile sheath which deforms under pressure and are embedded in an elastically deformable material.
- expanded microspheres which have a tensile sheath which deforms under pressure and are embedded in an elastically deformable material.
- FIG. 1 shows a cross section through a pump with jet nozzle
- FIG. 3 shows a first compressible body to FIG. 2
- FIG. 4 shows a second compressible body to FIG. 2.
- FIG. 1 shows a sectional view through a pump housing PG of a pump with a single-stage impeller arrangement and a jet nozzle arrangement.
- the illustration does not include the motor housing MG indicated by broken lines and the pump impeller rotating in operation in a running chamber LK1 about a rotation axis RA.
- the pump housing PG has a pump inlet PE which is connected via a line to a water source, for example a rainwater tank. can be tied.
- a pump outlet PA can lead to one or more irrigation devices by means of a flexible hose line.
- Characteristic of the jet nozzle are two concentric with each other about the axis of rotation RA arranged and offset in the direction of the rotation axis nozzle openings D1 and D2, the nozzle opening D1 forms a remindströmungspfad, via which water from the pressure chamber DR along the axis of rotation RA in the nozzle D2 as directed with respect to the main flow direction downstream in the direction of the impeller chamber LK1 beam is introduced, which exerts an additional suction in the nozzle D2 on the flowing over the pump inlet PA water.
- the pre-chamber is formed in the region of the nozzle D1 surrounding this annular.
- a first compressible body K1 1 is provided, which surrounds the longitudinal portion of the nozzle D2 and preferably on the outer surface of the nozzle D2 to the axis of rotation RA towards the wall is applied.
- the compressible body K1 1 can be manufactured separately, wherein the compressible body K1 1 then preferably consists of at least two partial bodies, and can be placed on the nozzle D2 from the outside thereof.
- the compressible body K1 1 can also be sprayed onto the nozzle D2 formed by an independent plastic injection-molded part and thereby be particularly intimately connected to its outer wall surfaces.
- the compressible body K1 1 communicates with the pressure space DR as one of several subspaces of the pump in a water-conducting connection, wherein this water-conducting compound in the example of the example sketched is provided by the large surface of the compressible body K1 1 facing away from the prechamber VK and facing the pressure space DR.
- the compressible body K1 1 advantageously serves at the same time as heat insulation, by means of which the interior of the nozzle D2 is particularly protected in a possibly occurring freezing process and at the axis of rotation RA in the nozzle D2 water is protected against freezing for a particularly long time.
- a radial pressure is typically already built up from the part of the pressure space DR present outside the compressible body K1 1 and via the compressible body K1 1 onto the outside wall of the nozzle D2. such that a pressure arising when freezing water within the nozzle D2 is already precompensated and the risk of damaging the wall of the nozzle D2 is low.
- At least one wall opening WO is formed by the wall which contains the nozzle arrangement VK by a wall bounding this, which is a water-conducting connection to another forms compressible body K12.
- This is advantageously arranged on a side of the pre-chamber VK facing away from the wall opening WO containing wall of the pre-chamber and the wall opening WO forms the water-conducting connection between the antechamber VK and this as a freezer contactor associated compressible body K12.
- the prechamber VK rising by freezing water pressure of the still liquid portion can escape through the wall opening WO and compress the compressible body K12 under elastic deformation.
- a pressure of for example 4 bar is present in the pressure chamber DR.
- the wall opening WO is sealed with the pump running against the passage of water.
- a valve in particular a flap valve, can be arranged on the side of the wall opening facing away from the pre-chamber VK.
- a seal can be provided solely by abutment of the compressible body K12 on the outside of the wall of the pre-chamber around the wall opening WO, wherein the increased pressure in the pressure chamber DR presses the compressible body K12 good sealing against the wall outside.
- Compressible bodies K1 1 and K12 may also be formed as a contiguous compressible body, as long as it allows a water passage from the antechamber through the wall opening as antifreeze.
- Fig. 2 shows in Fig. 1 analog representation, again with no detailed representation of the motor housing, a section through a garden pump with multi-stage impeller assembly, in which in a conventional manner in the direction of the axis of rotation RA more impeller chambers LK2 formed are in which in each case one of a plurality of wheels LR2 rotates, and which are separated by chamber partitions KT against each other.
- the pump housing consists in this embodiment of a plastic housing portion PP and a metal jacket PM preferably stainless steel sheet.
- first compressible body K21, K22, K23, K24 and K25 are provided, which are assigned to different subspaces of the interior of the pump housing.
- a first compressible body K21, a fourth compressible body K24, and a fifth compressible body K25 are associated with the pressure space surrounding the impeller assembly and the prechamber VK2.
- the first compressible body K21 which is shown in an oblique view in FIG. 3 in isolation, lies in the direction of the axis of rotation RA against the impeller arrangement and the antechamber VK2 is offset against the inner surface of the front-side sheet-metal jacket PM.
- the fourth compressible body K24 is preferably formed as a cutout of a circular cylinder jacket and is located on the outside of the impeller assembly of the housing outer surface at a distance.
- a plurality of such fourth compressible bodies K24 arranged distributed around the circumference of the impeller arrangement can advantageously be provided.
- the fifth compressible body K25 is formed after the main flow in the last impeller chamber on the housing end shield to the engine back.
- a second compressible body K22 arranged in its own housing chamber, the preferred shape of which is shown in FIG.
- the water-conducting compound is present preferably by one or more slots S22 between the second compressible body receiving chamber and the prechamber VK2 given, said at least one slot S22 is advantageously formed on the next wall of the chamber KA KA the prechamber VK2.
- the slot KA remains ice-free for a long time when successive freezing of water in the pump and can allow the passage of water from the prechamber into the chamber KA and thereby limit the overpressure in the pump interior.
- at least one, preferably several or in particular all impeller chambers of the impeller assembly are assigned independent compressible bodies K23 as antifreeze, wherein only one of these third antifreeze bodies K23 is explicitly emphasized and designated in FIG is.
- the third antifreeze body K23 is advantageously formed within an impeller chamber close to the axis of rotation RA and preferably connected to the rotating during operation impeller.
- This is located at a position within the impeller chamber LK2, which remains free of ice during the typically radially inwardly progressive icing particularly long, whereas the radially outer communication channels between individual stages of the multi-stage Impeller assembly typically are affected much earlier by icing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL10747851T PL2609334T3 (pl) | 2010-08-27 | 2010-08-27 | Pompa ogrodowa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/062540 WO2012025156A1 (de) | 2010-08-27 | 2010-08-27 | Gartenpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2609334A1 true EP2609334A1 (de) | 2013-07-03 |
| EP2609334B1 EP2609334B1 (de) | 2015-10-21 |
Family
ID=43983938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10747851.3A Active EP2609334B1 (de) | 2010-08-27 | 2010-08-27 | Gartenpumpe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2609334B1 (de) |
| HU (1) | HUE027412T2 (de) |
| PL (1) | PL2609334T3 (de) |
| WO (1) | WO2012025156A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141602B (zh) * | 2013-05-09 | 2015-12-23 | 利欧集团股份有限公司 | 一种自动花园喷射泵及其运转控制方法 |
| DE102018217179B4 (de) * | 2018-10-08 | 2023-06-29 | Vitesco Technologies GmbH | Fluidpumpe, Wasserfördereinheit, Wassereinspritzsystem, Verbrennungsmotor und Fahrzeug |
| DE102018217176B4 (de) * | 2018-10-08 | 2020-06-10 | Continental Automotive Gmbh | Fluidpumpe, Wasserfördereinheit, Wassereinspritzsystem, Verbrennungsmotor und Fahrzeug |
| CN111022333B (zh) * | 2019-07-04 | 2024-08-13 | 利欧集团浙江泵业有限公司 | 一种喷射水泵 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54116709A (en) | 1978-03-03 | 1979-09-11 | Hitachi Ltd | Wesco pump |
| JPS58158395A (ja) * | 1982-03-15 | 1983-09-20 | Mitsubishi Electric Corp | ウエスコポンプ |
| JPS58185989A (ja) * | 1982-04-23 | 1983-10-29 | Mitsubishi Electric Corp | 自吸式ポンプ |
| JPS58210396A (ja) * | 1982-05-31 | 1983-12-07 | Mitsubishi Electric Corp | 自吸式電動ポンプ |
| JPS5918298A (ja) * | 1982-07-20 | 1984-01-30 | Mitsubishi Electric Corp | うず巻ポンプ |
| JPH01200092A (ja) | 1988-02-02 | 1989-08-11 | Shindo Pump Kk | 自吸式ポンプ |
| US6447269B1 (en) | 2000-12-15 | 2002-09-10 | Sota Corporation | Potable water pump |
| CA2497056A1 (en) | 2002-08-31 | 2004-03-11 | Oase Gmbh | Submersible motor-driven pump with an anti-freeze device |
| JP2005113686A (ja) * | 2003-10-02 | 2005-04-28 | Aisan Ind Co Ltd | 燃料ポンプ |
| DE202005014071U1 (de) | 2005-09-06 | 2007-01-18 | Oase Gmbh | Pumpe für Teich-, Aquarien- o.dgl. Anlagen |
-
2010
- 2010-08-27 EP EP10747851.3A patent/EP2609334B1/de active Active
- 2010-08-27 WO PCT/EP2010/062540 patent/WO2012025156A1/de not_active Ceased
- 2010-08-27 HU HUE10747851A patent/HUE027412T2/en unknown
- 2010-08-27 PL PL10747851T patent/PL2609334T3/pl unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012025156A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| HUE027412T2 (en) | 2016-10-28 |
| PL2609334T3 (pl) | 2016-03-31 |
| EP2609334B1 (de) | 2015-10-21 |
| WO2012025156A1 (de) | 2012-03-01 |
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