EP3559362A1 - Abwasserhebeanlage mit schneidwerk - Google Patents
Abwasserhebeanlage mit schneidwerkInfo
- Publication number
- EP3559362A1 EP3559362A1 EP17822614.8A EP17822614A EP3559362A1 EP 3559362 A1 EP3559362 A1 EP 3559362A1 EP 17822614 A EP17822614 A EP 17822614A EP 3559362 A1 EP3559362 A1 EP 3559362A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- housing part
- centrifugal pump
- fixed element
- impeller
- 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
- 239000002351 wastewater Substances 0.000 title description 18
- 238000005520 cutting process Methods 0.000 title description 6
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims description 24
- 239000004033 plastic Substances 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 8
- 239000010865 sewage Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005245 sintering Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 235000019645 odor Nutrition 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010002 mechanical finishing Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
-
- 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
Definitions
- the invention relates to a device comprising a container for collecting a medium and at least one centrifugal pump for conveying the medium from the container and a crushing arrangement which is upstream of an impeller, wherein the crumbling arrangement comprises a rotating element which is connected to a stationary element for comminution of solid admixtures in the medium interacts.
- Such a device may be, for example, a sewage lifting plant.
- Sewage lifting plants discharge water that accumulates below a backflow level in a backflow-proof manner. They are used to extract sewage-free and faecal wastewater, which accumulates in basements of residential buildings.
- the wastewater In a container, the wastewater is collected. The level is detected by a level sensor. If a certain limit is reached, a centrifugal pump turns on, which promotes the wastewater from the plastic container.
- a sewage lifting plant which has the largest possible switching volume. Since the base of the waste water tank and the highest possible switch-on level are generally predetermined or limited by the dimensions of the device, a very low switch-off level is provided structurally.
- a flexible bendable pipe section is sealed with its first end attached to the suction port of a centrifugal pump and the second and free end is closer to the bottom of the container than the suction port.
- the flexibly bendable material of the pipe section has the disadvantage that, when pumping liquids mixed with solid admixtures, it collapses during the pumping down process due to the negative pressure or a bending over by solids, and the suction opening can become clogged.
- the centrifugal pump has a housing part in which an impeller is arranged.
- the housing part is positively connected to the container.
- a typical crushing arrangement which is connected upstream of the impeller of the centrifugal pump in such wastewater lifting systems, shows the DE 37 03 647 C2.
- the shredding device comprises a rotating element which cooperates with a stationary element. In conventional wastewater lifting systems, the fixed element is mounted in front of the housing part of the centrifugal pump on the outside of the housing part.
- EP 1 344 944 B1 shows a centrifugal pump with a comminution device upstream of the impeller for fibrous or particulate admixtures in the medium.
- the comminution device has a rotating element revolving around the pump impeller.
- this is a cutting head.
- the cutting head cooperates with a cutting insert which is fixedly disposed on the housing of the centrifugal pump.
- the object of the invention is to provide a device that conveys collected wastewater in a container without causing blockage. Furthermore, a reliable seal against the collected wastewater and against odors should be ensured.
- the device should be characterized by a simple installation and reliable operation. Furthermore, the device should be easy to maintain and have a long service life. This object is achieved by a device having the features of claim 1. Preferred variants can be found in the subclaims, the description and the drawings.
- the device has a comminution arrangement with a stationary element, which is arranged on the inside of a housing part of the centrifugal pump.
- the construction according to the invention makes it possible for assembly and maintenance of the comminution device to take place from above, without the housing part of the centrifugal pump having to be disassembled. This is particularly important in constructions in which the housing of the centrifugal pump is integrated into the container of the wastewater treatment plant.
- the fixed element of the crushing device is mounted on the inside of the housing part of the centrifugal pump. It proves to be advantageous if the fixed element has a larger dimension, preferably a larger diameter, than the narrowest point of the suction mouth of the centrifugal pump.
- the housing of the centrifugal pump forms a suction mouth, which preferably has a smaller diameter at its narrowest point than the stationary element of the comminuting device.
- the fixed element is an annular structure.
- the fixed element rests on a support of the housing part.
- the housing part of the centrifugal pump which is preferably designed as a spiral housing, positively connected to the container.
- the housing part can be positively connected by rotational sintering with the plastic container formed.
- the housing part of the centrifugal pump is arranged in a mold for this purpose.
- the mold is mounted on a mold carrier.
- a preheating of the rotational mold and the housing part takes place.
- Plastic particles are introduced into the mold. This may be, for example, a plastic granulate and / or a plastic powder.
- the plastic particles are applied by rotation to the mold and the housing. During the rotation process, a temperature is maintained, which leads to the melting of the plastic particles.
- the plastic particles are pressed by the rotational forces to the mold and the housing, where they melt and solidify. As a result, a unitary structure is created from a container and an integrated housing part of the centrifugal pump.
- the housing part of the centrifugal pump consists of a metallic material.
- the housing part of the centrifugal pump may be a cast material.
- the metallic housing part is embedded in such a way in the plastic walls of the container by the rotational sintering process, that additional sealing elements between the outer wall of the metallic housing and the walls of the container are dispensable.
- the walls of the container sealingly against the housing, so that no medium or odors can escape.
- the fixed element of the comminution arrangement has an outer part which at least partially surrounds an inner part.
- the division of the fixed element into an outer part and an inner part brings with it considerable advantages.
- the two parts can be made of different materials.
- the outer part is made of a plastic.
- the inner part is preferably made of a metal. It proves to be particularly favorable when the fixed element is designed as a metal-plastic composite part.
- a hard cast part is preferably provided structurally with an outer surface which has projections.
- FIG. 1 shows an exploded view of a wastewater lifting plant with a centrifugal pump, which has a comminution arrangement
- Crushing arrangement 3 shows a perspective view of the fixed element shown in FIG. 2
- FIG. 4 shows the assembled variant of the sewage lifting device illustrated in FIG.
- Figure 1 shows in the form of an exploded view of a device with a centrifugal pump, which is integrated into a wastewater lifting plant.
- the wastewater lifting plant comprises a container 1.
- the container 1 consists of a plastic. This is designed as a sump for non-pressure operation. Wastewater is cached and then transported to a sewer. It proves to be particularly favorable if the nominal volume of the container 1 is less than 500 l, preferably less than 300 l, in particular less than 100 l. In the exemplary embodiment, the nominal volume of the container 1 is about 50 I.
- the container 1 has a higher in its height trained area with at least one inlet 2 and a lower trained by the height range in which the designed as an aggregate centrifugal pump is arranged. Furthermore, the container 1 has an emptying port 3.
- the container 1 is provided on its upper side with a hand hole which is closed by a cover 4.
- a sensor for detecting the level is arranged.
- a float switch is used.
- the container 1 has a vent connection 5. About a arranged on the container 1 drain the collected water in the container 1 is conveyed out.
- a housing part 6 of the centrifugal pump is positively integrated.
- the housing part 6 in the exemplary embodiment is a spiral housing of the centrifugal pump. It consists of a cast iron Material.
- the housing part 6 is enclosed by walls 7 of the container made of plastic 1 positively.
- the walls 7, which enclose the housing part 6, are integrally formed with the rest of the container 1.
- the housing part 6 is embedded in the container 1. In the exemplary embodiment, this is achieved by rotation sintering. This procedure performs the following steps:
- the housing part 6 For rotating the housing part 6, this is first attached by means of a suitable connection to the rotational mold.
- the housing part 6 and the mold are preheated and controlled temperature controlled throughout the rotation process by means of a heater.
- the temperature is adapted to the plastic used.
- thermoplastic is used as plastic granules. It is preferably a polyethylene (PE-LLD).
- PE-LLD polyethylene
- the container 1 forms with the desired wall 7. Through the use of rotational sintering, the wall 7 of the container 1 surrounds the housing part 6 so that no additional sealing is required.
- the centrifugal pump comprises in addition to the formed as a spiral housing housing part 6, an impeller 8 which is rotatably connected to a shaft 9 which is driven by a motor 10.
- the motor 10 includes a rotor 1 1 and a stator 12.
- the motor unit protrudes vertically out of the container 1.
- the arrangement is preferably arranged below a backflow level.
- the wastewater is pumped by the centrifugal pump through a drain in a sewer.
- the impeller 8 of the centrifugal pump is preferably an open radial wheel which has no suction-side cover disk.
- the impeller 8 is designed as a freewheel.
- the impeller 8 has blades between which channels are formed. The blades are arranged on a pressure-side support disk of the impeller 8.
- a rotating element 13 of a crushing arrangement On the suction side in front of the impeller 8, a rotating element 13 of a crushing arrangement is arranged, which is rotatably connected in the embodiment with the shaft 9.
- the rotating element 13 has radial openings 14.
- the comminution arrangement has a fixed element 15.
- the fixed element 15 is annular and encloses the rotating element 1 3 at least partially during operation.
- the established Element 15 is provided with a plurality of teeth 16.
- the teeth 1 6 project on the suction side into the suction mouth 17 of the housing part 6 of the centrifugal pump.
- the teeth 1 6 are arranged in a swept by the openings 14 of the rotating member 13 area.
- the fixed element 15 is arranged according to the invention on the inside of the housing part 6.
- the fixed element 15 has larger dimensions than the narrowest point of the suction mouth 1 7.
- the fixed element 15 rests on a support 18 of the housing part 6.
- the support 18 is formed in the embodiment as a circumferential paragraph.
- the fixed element 15 is mounted on the inside 19 of the housing part 6.
- the fixed element 15 of the comminution arrangement is inserted from above into the housing part 6 of the centrifugal pump, so that maintenance of the comminution device can take place from above.
- This is indispensable in the exemplary embodiment, since the housing part 6 is integrated in a form-fitting manner in the container 1 and thus the comminution device is not accessible from below.
- FIG. 2 shows a preferred design of the fixed element 15 of the crushing arrangement.
- the fixed member 15 has an outer part 20 and an inner part 21 made of different materials.
- the outer part 20 is annular and surrounds the inner part 21 completely.
- the inner part 21 consists of a metallic material, which in the exemplary embodiment is a Hartgussteil acts.
- the inner part 21 is formed as a ring and has teeth 16 which are provided with cutting edges 22.
- the fixed element 15 has at its outer radius a support surface 21 with which the fixed element 15 rests on the support 18 of the housing part 6.
- FIG. 3 shows a perspective view of the fixed element 15 of the comminution arrangement.
- the inner part 21 of the fixed element 15 has at its outer radius projections 24 which serve a positive connection between the outer part 20 and the inner part 21.
- the fixed element 15 in the exemplary embodiment is a metal-plastic composite part, wherein the inner part is made of metal and the outer part is made of a plastic.
- the preparation of the fixed element 15 is effected by pouring the metallic see inner part in the outer plastic part. A pressure-free plastic casting process is used.
- the outer part 20 consists of a thermoset, preferably PUR199 is used. This material has sufficient stability and high wear resistance and a high chemical resistance to the substances present in the wastewater.
- the fixed element 1 5 rests on a support 18 of the housing part 6 on the inside of the housing part 6 and is thus arranged within the housing part 6.
- the fixed element 15 has a larger diameter than the narrowest point of the suction mouth 1 7, which is formed by the housing part 6.
- the liquid flows from below through the openings 15 to the impeller 8 and is then conveyed by the impeller 8 radially outwardly and enters the spiral channel 26, which is enclosed by the housing part 6.
- the centrifugal pump then conveys the medium through a nozzle out of the container 1.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sewage (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016225921.0A DE102016225921A1 (de) | 2016-12-21 | 2016-12-21 | Abwasserhebeanlage mit Schneidwerk |
PCT/EP2017/082562 WO2018114511A1 (de) | 2016-12-21 | 2017-12-13 | Abwasserhebeanlage mit schneidwerk |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3559362A1 true EP3559362A1 (de) | 2019-10-30 |
EP3559362B1 EP3559362B1 (de) | 2022-04-06 |
Family
ID=60888386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17822614.8A Active EP3559362B1 (de) | 2016-12-21 | 2017-12-13 | Abwasserhebeanlage mit schneidwerk |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3559362B1 (de) |
CN (1) | CN110139965B (de) |
CL (1) | CL2019001764A1 (de) |
DE (1) | DE102016225921A1 (de) |
RU (1) | RU2749751C2 (de) |
WO (1) | WO2018114511A1 (de) |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2411043A1 (de) * | 1974-03-08 | 1975-09-18 | Abs Pumps Ltd | Abwasserpumpe |
US3961758A (en) * | 1974-08-23 | 1976-06-08 | Peabody Barnes, Inc. | Centrifugal pump with integral grinder |
JPS5838396A (ja) * | 1981-08-29 | 1983-03-05 | Ebara Corp | グラインダ−ポンプ |
DE3703647A1 (de) | 1987-02-06 | 1988-08-18 | Klein Schanzlin & Becker Ag | Kreiselpumpe fuer verunreinigte fluessigkeiten |
JPH061078B2 (ja) * | 1989-05-01 | 1994-01-05 | 株式会社鶴見製作所 | グラインダーポンプ |
CH689058A5 (de) * | 1994-11-28 | 1998-08-31 | Haeny & Cie Ag | Kreiselpumpe fuer mit Feststoffanteilen belastete Abwaesser. |
DE10132084A1 (de) | 2001-07-05 | 2003-01-16 | Wilo Gmbh | Abwasser-Hebeanlage mit tiefer Absaugung |
ATE268436T1 (de) | 2002-03-14 | 2004-06-15 | Ksb Ag | Kreiselpumpe mit zerkleinerungseinrichtung |
DE10305726A1 (de) * | 2002-03-14 | 2003-10-02 | Ksb Ag | Kreiselpumpe mit Zerkleinerungseinrichtung |
DE102007008692A1 (de) | 2007-02-20 | 2008-08-21 | Ksb Aktiengesellschaft | Niveauabhängige Steuerung von Pumpen |
CN201043529Y (zh) * | 2007-04-27 | 2008-04-02 | 厦门河昌电机有限公司 | 改良型泵浦搅碎装置 |
DE102008057233A1 (de) * | 2008-11-10 | 2010-05-12 | Orpu Pumpenfabrik Gmbh | Vorrichtung zum Zerkleinern von in flüssigen Medien befindlichen Bestandteilen |
EP2489799B1 (de) * | 2011-02-16 | 2014-08-20 | Grundfos Management a/s | Abwasserhebeanlage |
DE102011112580B4 (de) * | 2011-09-08 | 2014-03-20 | Schmalenberger Gmbh & Co. Kg | Selbstansaugende Pumpe mit Schneidwerk |
DE102014003096A1 (de) * | 2014-03-11 | 2015-09-17 | Homa Pumpenfabrik Gmbh | Hebeanlage für Abwasser |
DE102015204075A1 (de) | 2015-03-06 | 2016-09-08 | Ksb Aktiengesellschaft | Kunststoffbehälter mit strömungsführendem Bauteil |
CN104696260A (zh) * | 2015-03-13 | 2015-06-10 | 江苏大学 | 一种新型污水泵切割装置 |
DE102016200910A1 (de) * | 2016-01-22 | 2017-07-27 | Ksb Aktiengesellschaft | Anlage |
-
2016
- 2016-12-21 DE DE102016225921.0A patent/DE102016225921A1/de not_active Withdrawn
-
2017
- 2017-12-13 WO PCT/EP2017/082562 patent/WO2018114511A1/de unknown
- 2017-12-13 CN CN201780082543.4A patent/CN110139965B/zh active Active
- 2017-12-13 EP EP17822614.8A patent/EP3559362B1/de active Active
- 2017-12-13 RU RU2019122298A patent/RU2749751C2/ru active
-
2019
- 2019-06-21 CL CL2019001764A patent/CL2019001764A1/es unknown
Also Published As
Publication number | Publication date |
---|---|
WO2018114511A1 (de) | 2018-06-28 |
RU2019122298A3 (de) | 2021-01-25 |
RU2019122298A (ru) | 2021-01-22 |
RU2749751C2 (ru) | 2021-06-16 |
EP3559362B1 (de) | 2022-04-06 |
CN110139965B (zh) | 2022-06-24 |
CL2019001764A1 (es) | 2019-09-23 |
CN110139965A (zh) | 2019-08-16 |
DE102016225921A1 (de) | 2018-06-21 |
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