EP3559479A1 - Centrifugal pump comprising a comminuting assembly - Google Patents
Centrifugal pump comprising a comminuting assemblyInfo
- Publication number
- EP3559479A1 EP3559479A1 EP17818506.2A EP17818506A EP3559479A1 EP 3559479 A1 EP3559479 A1 EP 3559479A1 EP 17818506 A EP17818506 A EP 17818506A EP 3559479 A1 EP3559479 A1 EP 3559479A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner part
- centrifugal pump
- outer part
- impeller
- fixed element
- 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
- 239000007787 solid Substances 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims description 31
- 229920003023 plastic Polymers 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000968 Chilled casting Inorganic materials 0.000 description 1
- 206010010774 Constipation Diseases 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010002 mechanical finishing Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
- 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
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- 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
- F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
-
- 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
- F04D13/16—Pumping installations or systems with storage reservoirs
Definitions
- the invention relates to a device with a centrifugal pump and a crushing arrangement, which is upstream of an impeller, wherein the crushing arrangement comprises a revolving element which cooperates with a stationary element for the comminution of solid admixtures in a conveying medium.
- centrifugal pumps for the promotion of solids contaminated liquids so that they crush the solids so far that blockages occur neither in the pump itself nor in the downstream lines.
- the pump wheels are provided with cutting pieces in known embodiments, which cooperate with counterparts mounted on the housing. To compensate for the resulting wear, the wheels are often stored adjustable.
- the CH 423 489 describes a centrifugal pump, which has a cutting ring in front of an inlet opening of the impeller, which cooperates with a resiliently pressed against him cutting piece.
- the cutting ring can be as a flat, tapered or too be designed as a cylindrical part. With a cylindrical design of the cutting ring, the cutting piece can be arranged on the inside or outside of the cylinder.
- DE 37 03 647 C2 describes a pump having a cutting insert provided with a plurality of teeth located in the area swept by the cutting edges of the rotating part.
- the leading edges of the blade of the impeller located downstream of the comminution device are exposed, as is often the case with circular pumps equipped with such comminution devices.
- admixtures may adhere to the entry edges which, after passing through the comminuting device, cause a have limited extension, but still large enough to be held by an entry edge.
- the deposits lead to a deterioration of the conveying properties of the affected centrifugal pump; in extreme cases, they can lead to constipation and thus to serious damage.
- EP 1 344 944 B1 describes a centrifugal pump with a comminution device upstream of the pump impeller for fibrous or particulate admixtures in the delivery fluid.
- the comminution device has an element revolving around the impeller, which element is designed as a cutting head with a plurality of cutting edges.
- the revolving element interacts with a stationary element.
- the fixed element is a cutting insert arranged in the housing of the centrifugal pump.
- the object of the invention is to provide a device which avoids the disadvantages outlined above.
- the device should be characterized by an inexpensive production and ensure reliable operation.
- the device should reliably crush the solid admixtures in the medium, so that blockages in the centrifugal pump and the downstream piping are effectively prevented.
- This object is achieved by a centrifugal pump with the features of claim 1.
- Preferred embodiments can be taken from the subclaims, the description and the drawings.
- 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.
- the inner part which preferably consists of a hard cast part, has cutting edges. Before using the fixed element then only the cutting edges of the inner part must be processed.
- the metallic inner part is preferably enclosed in a plastic casting. The execution of the fixed element as a composite component with an inner part made of metal and an outer part made of plastic makes it possible that when assembling this fixed element of the shredding device only processed the much softer outer plastic part to produce the required fit or attachment of the required fasteners must become. To process this soft outer part, for example, bores are introduced or the fit for receiving is prepared accordingly.
- the inner part of the stationary element of the comminution device and / or the outer part are ring-shaped. It proves to be beneficial if the outer part forms a ring which completely surrounds the annular inner part.
- the inner part is preferably a cutting ring, wherein it proves to be advantageous if this cutting ring from a Chilled cast iron is made.
- the outer part is preferably a plastic ring. According to the invention, the inner part has a greater hardness compared to the outer part.
- the inner part of the fixed element which may be formed as a chilled casting cutting ring, preferably consists of a cast iron with a high carbon content.
- the material of the inner part preferably has a density of more than 6 g / cm 3 , preferably more than 7 g / cm 3 .
- the outer part of the fixed component, which forms a receptacle for the inner part preferably consists of a duroplastic. It has proved to be beneficial when a plastic is used, which can not be deformed after its curing by heating or other measures.
- a material is used which has hard, amorphous, insoluble polymers.
- macromolecules of the plastic are covalently crosslinked via covalent bonds, which causes their lack of softening when heated.
- a preferred material for the outer part is a polyurethane, wherein in particular PUR199 has proved to be advantageous.
- the inner part has projections which form a positive connection after pouring the inner part in the outer part.
- the inner part have a toothed outer surface. The outwardly projecting projections of the inner part are enclosed by the plastic casting and thereby form a positive connection.
- the inner part of the stationary crushing element is preferably provided with a plurality of teeth. These teeth preferably protrude into the suction mouth and have cutting edges. Upon rotation of the rotating element of the comminution device, these cutting edges contribute to a comminution of the solid admixtures in the pumped medium. It proves to be particularly advantageous if the peripheral element of the comminution device has openings for flowing in the medium to the impeller. Preferably, these are radial openings.
- the peripheral part is enclosed by the fixed part attached to the suction-side housing, which is provided with a plurality of teeth. The teeth are located in the area swept by the openings of the rotating part.
- the admixtures in the fluid are attracted to the suction of the impeller and reach the area formed by the fixed element and the rotating element of the cutter.
- the solid admixtures are first held by the stationary member and broken up into small pieces by the cooperating edges of the apertures of the circulating member and the teeth of the fixed member. This is done by detecting the solid particles that have entered the openings of the revolving element and separating them with a pulling cut.
- the openings of the rotating element are circular. But they can also be oval, diamond-shaped or slit-shaped.
- the teeth of the fixed element are preferably formed from a chilled cast iron, sintered metal or a hardened tool steel.
- FIG. 1 shows an exploded view of a wastewater lifting plant with a centrifugal pump, which has a comminution arrangement
- FIG. 2 shows a section through a stationary element of the comminuting arrangement illustrated in FIG. 1,
- FIG. 3 is a perspective view of the fixed one shown 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.
- 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.
- 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 material.
- the housing part 6 is enclosed in a form-fitting manner by walls 7 of the container 1 made of plastic.
- 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 rotational sintering. In this method, the following steps are carried out: - fixing the housing part 6 in a 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.
- a 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.
- the wall 7 of the container 1 surrounds the housing part 6 so that no additional sealing is required.
- a unit of the housing part 6 and container 1 is provided in which the housing part 6 is at least partially enclosed by a wall 7 of the container 1, wherein a positive connection is created so that the housing part. 6 forms a structural unit with the container 1.
- 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.
- a switching signal triggers the command "switch on pump”.
- the pump is then switched by a control device.
- the liquid level in the container 1 decreases.
- the centrifugal pump is switched off again.
- 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 impeller 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.
- 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 fixed 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.
- solid particles in the medium are attracted to the suction of the impeller 8 and thus reach the region of the comminuting device formed by the stationary element 15 and the rotating element 13.
- the solid particles are first held by the fixed member 15 and disassembled into small pieces by an interaction of edges of the openings 14 and the teeth 16. This happens because the reaching into the openings 14 parts of the solid are detected and separated with a pulling section.
- the openings 14 are formed in the embodiment round.
- 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 stationary 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.
- Figure 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 hard cast part.
- 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.
- Figure 4 shows the device shown in Figure 1 in the form of an exploded view in the assembled state. It can be seen that 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016225920.2A DE102016225920A1 (en) | 2016-12-21 | 2016-12-21 | Centrifugal pump with a crushing arrangement |
PCT/EP2017/082555 WO2018114507A1 (en) | 2016-12-21 | 2017-12-13 | Centrifugal pump comprising a comminuting assembly |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3559479A1 true EP3559479A1 (en) | 2019-10-30 |
EP3559479B1 EP3559479B1 (en) | 2024-04-17 |
EP3559479C0 EP3559479C0 (en) | 2024-04-17 |
Family
ID=60788584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17818506.2A Active EP3559479B1 (en) | 2016-12-21 | 2017-12-13 | Centrifugal pump with chopping arrangement |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3559479B1 (en) |
CN (1) | CN110121600A (en) |
CL (1) | CL2019001765A1 (en) |
DE (1) | DE102016225920A1 (en) |
RU (1) | RU2745129C2 (en) |
WO (1) | WO2018114507A1 (en) |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1528853A1 (en) | 1962-10-12 | 1969-12-04 | Schade Geb Feissel Hertha | Centrifugal pump for contaminated fluids with crushing device |
US3961758A (en) * | 1974-08-23 | 1976-06-08 | Peabody Barnes, Inc. | Centrifugal pump with integral grinder |
DE2612910A1 (en) | 1976-03-26 | 1977-09-29 | Albert Blum | SEWAGE PUMP |
SU715826A1 (en) * | 1978-07-31 | 1980-02-15 | Центральный Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Нечерноземной Зоны Ссср | Centrifugal pump |
DE3153268C2 (en) * | 1981-01-31 | 1988-01-28 | Friedrich Wilh. Schwing Gmbh, 4690 Herne, De | Two-cylinder viscous-material pump, preferably concrete pump |
JPS6140795U (en) * | 1984-08-17 | 1986-03-14 | ソニー株式会社 | Electronic device lids |
DE3703647A1 (en) | 1987-02-06 | 1988-08-18 | Klein Schanzlin & Becker Ag | CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS |
CN2120207U (en) * | 1992-05-16 | 1992-10-28 | 上海市第五车辆配件厂金汇联营厂 | Submersible cutting pump |
CH689058A5 (en) * | 1994-11-28 | 1998-08-31 | Haeny & Cie Ag | Centrifugal pump for contaminated with solids sewage waters. |
US6524066B2 (en) * | 2001-01-31 | 2003-02-25 | Bruno H. Thut | Impeller for molten metal pump with reduced clogging |
DE20114891U1 (en) * | 2001-09-10 | 2001-11-15 | Grundfos A/S, Bjerringbro | Sewage centrifugal pump |
EP1344944B1 (en) | 2002-03-14 | 2004-06-02 | KSB Aktiengesellschaft | Centrifugal pump with crushing device |
US7159806B1 (en) * | 2005-01-18 | 2007-01-09 | Ritsema Stephen T | Cutter assembly for a grinder pump |
DE202006006309U1 (en) * | 2006-04-18 | 2007-08-30 | Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg | Centrifugal pump for abrasive liquid e.g. coolant emulsion, has housing with cavity, where portion of inner walls of cavity is formed through wear protection part, which is cast in into cast part, and made of abrasion resistant metal |
CN201043529Y (en) * | 2007-04-27 | 2008-04-02 | 厦门河昌电机有限公司 | Improved pump blender |
EP2143957B2 (en) * | 2008-07-10 | 2016-08-10 | Grundfos Management A/S | Flow guiding component of a pump |
DE102008057233A1 (en) * | 2008-11-10 | 2010-05-12 | Orpu Pumpenfabrik Gmbh | Milling device for use in pump to e.g. mill thick matter available in sewage water, has cutting devices formed spatially separate from another cutting device such that rotation symmetric cutting parts enclose stationary cutting part |
CN102042236A (en) * | 2009-10-14 | 2011-05-04 | 苏道忠 | Sewage pump capable of automatically crushing high viscosity solid medium |
DE102011112580B4 (en) * | 2011-09-08 | 2014-03-20 | Schmalenberger Gmbh & Co. Kg | Self-priming pump with cutting unit |
CN103062096A (en) * | 2011-10-19 | 2013-04-24 | 江苏省宜兴非金属化工机械厂有限公司 | Lining plastic corrosion resisting fan |
CN102996493A (en) * | 2012-12-11 | 2013-03-27 | 江苏大学 | Anti-cavitation grinding device of submerged grinding pump |
CN205714818U (en) * | 2016-04-26 | 2016-11-23 | 上海东方泵业(集团)有限公司 | A kind of chopper type centrifugal submersible pumps |
-
2016
- 2016-12-21 DE DE102016225920.2A patent/DE102016225920A1/en active Pending
-
2017
- 2017-12-13 EP EP17818506.2A patent/EP3559479B1/en active Active
- 2017-12-13 RU RU2019122297A patent/RU2745129C2/en active
- 2017-12-13 WO PCT/EP2017/082555 patent/WO2018114507A1/en unknown
- 2017-12-13 CN CN201780082512.9A patent/CN110121600A/en active Pending
-
2019
- 2019-06-21 CL CL2019001765A patent/CL2019001765A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP3559479B1 (en) | 2024-04-17 |
EP3559479C0 (en) | 2024-04-17 |
RU2019122297A3 (en) | 2021-01-22 |
CN110121600A (en) | 2019-08-13 |
RU2019122297A (en) | 2021-01-22 |
WO2018114507A1 (en) | 2018-06-28 |
RU2745129C2 (en) | 2021-03-22 |
DE102016225920A1 (en) | 2018-06-21 |
CL2019001765A1 (en) | 2020-03-13 |
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Legal Events
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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