EP2489800B1 - Installation de relèvement d'eaux usées - Google Patents
Installation de relèvement d'eaux usées Download PDFInfo
- Publication number
- EP2489800B1 EP2489800B1 EP11001253.1A EP11001253A EP2489800B1 EP 2489800 B1 EP2489800 B1 EP 2489800B1 EP 11001253 A EP11001253 A EP 11001253A EP 2489800 B1 EP2489800 B1 EP 2489800B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- housing
- sensor
- waste water
- container
- 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.)
- Active
Links
- 239000002351 wastewater Substances 0.000 title claims description 32
- 239000012528 membrane Substances 0.000 claims description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 230000033001 locomotion Effects 0.000 claims description 26
- 238000009434 installation Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 description 10
- 210000002414 leg Anatomy 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Images
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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
Definitions
- the invention relates to a wastewater lifting plant with the features specified in the preamble of claim 1.
- Wastewater lifting plants are used to raise sewage, which is at a level below a sewer, to the level of the sewer system.
- sewage lifting plants which have a container in which flows in the water to be lifted.
- In the container or on the container at least one pump is arranged, which then pumps the wastewater from the container to the desired higher level.
- a level sensor is arranged on or in the container, which detects the water level in the interior of the container and the pump on and off depending on the water level.
- the problem with these sewage lifting systems is that the fill level sensor can be impaired in its function by impurities which are carried in the wastewater.
- WO 03/07113 A1 discloses a submersible pump with a level switch, wherein the level switch has a housing provided for immersion in the liquid, in which a pressure sensor is arranged and which is closed to the liquid through a membrane. About pressure changes inside the housing, the fluid level is detected.
- US 5,152,670 discloses a sewage collection tank with a pump and a pressure sensor designed as a level sensor, which has a membrane towards the liquid, in the displacement of an electrical contact is actuated.
- a corresponding level switch is off US 2,922,002 known, which discloses a submersible pump with such a pressure switch.
- the sewage lifting plant according to the invention also has a container which is provided with at least one drain opening. At this inlet opening an input-side sewer line can be connected, through which flow to be lifted wastewater in the Behölter.
- At least one pump is arranged on or in the container, which is suitable for pumping the wastewater out of the container to a higher level.
- a level sensor is arranged in the container. The level sensor is designed so that it turns on the pump when it reaches a predetermined level and the pump turns off when falling below this level or upon reaching a second predetermined lower water level.
- the filling level sensor has a preferably completely closed membrane housing arranged in the container, which has a movable membrane in one of its housing walls.
- This membrane forms the actual sensor element.
- the membrane housing with the membrane is arranged so that the membrane is immersed in the water in the container at least on reaching the water level at which the pump is to be switched on. Since the membrane housing with the membrane then displaces part of the liquid or of the wastewater, a pressure is exerted by the waste water on the membrane housing and thus the membrane from the outside, which leads to a movement or deformation of the movable membrane.
- the diaphragm is coupled to at least one sensor or switch for switching the pump on and off.
- the movement or the deformation of the membrane is transmitted to the at least one switch such that the movement or deformation of the membrane a switching operation of the Switch causes.
- a sensor may be provided which detects the deformation or movement of the membrane and then optionally via an intermediate control device which evaluates the sensor signal, the pump on and off.
- the configuration of the fill level sensor in this way has the advantage that the actual sensor or switch components are arranged in the interior of the membrane housing, which is completely closed to the interior of the container in which the wastewater is located.
- sensor and switch inside the membrane housing do not come into contact with the waste water.
- the electrical components are protected from contact with water and moisture.
- moving mechanical parts of the switch are so protected from the sewage and impurities.
- the membrane is also affected by impurities on the outside usually not in their mobility. This creates a reliable, robust level sensor with a high level of operational reliability.
- the membrane is preferably arranged on the lower side of the membrane housing. Thus, this first dips into the water and is pressurized by the waste water and the water displacement, so that it then comes to the detectable movement or deformation of the membrane.
- the membrane is detachable, preferably connected via a bayonet coupling with the membrane housing.
- the membrane housing by removing the Membrane are opened, for example, to carry out repair or maintenance work inside the diaphragm housing.
- the membrane can be easily replaced, for example, if it is damaged or in their mobility, z. B. is affected by aging.
- the membrane is preferably sealed with the other housing walls of the diaphragm housing in plant.
- a separate sealing element may be provided which comes to rest between the membrane and a surrounding housing wall.
- the membrane itself can serve as a seal. It is also possible to form a suitable seal directly on the surrounding housing wall.
- the membrane housing with the membrane is expediently designed and arranged in the interior of the container such that, during operation of the sewage lifting system, the membrane is located vertically below a maximum water level in the container.
- the maximum water level in the container is that water level, which occurs in normal operation as the maximum water level and makes an Enschalt the pump required.
- the pressure on the outside of the diaphragm housing and diaphragm increases, causing the diaphragm to deform more or less, and only when this greater deformation or movement activates a switch or sensor inside the diaphragm housing to turn on the pump.
- an actuating element is arranged such that it transmits a movement of the membrane to a switch.
- This actuator may be a mechanical component, which transmits the movement of the membrane, for example, to a switch contact of the switch.
- at least one lever or a lever system for transmitting movement can be arranged in the interior of the diaphragm housing between the diaphragm and the switch.
- At least one receptacle for one or more weight element is formed on the membrane or a component coupled to the motion of the membrane.
- the level at which a switching operation of the switch is to be executed can then be set. If the membrane is loaded from the inside of the membrane housing with a weight force caused by one or more weight elements, a corresponding higher external force acting on the membrane force is required to deform or move the membrane. Ie. it is a greater external pressure acting on the membrane water pressure and thus a higher water level required to move the membrane and thus perform a switching operation.
- the membrane and the components coupled to it are configured such that they experience buoyancy in the water.
- a weight force opposing this buoyancy can be exerted on the membrane, so that a greater buoyancy, ie, movement, of the membrane and thus causing a switching process.
- a larger water pressure acting on the membrane is required.
- At least one weight element is provided, which is detachably fastened to the receptacle.
- this weight element can thus the switching threshold or the water level in the container, where the switch is to turn on the pump, to be changed.
- several or different weight elements may be provided for selectively attaching to the recording.
- the membrane housing is connected at its upper end to a sensor housing in which the switch or the sensor is arranged.
- the switch or the actual sensor which detects the movement of the membrane, can additionally be additionally encapsulated in the sensor housing.
- the sensor housing can be separated from the diaphragm housing, for example by a closed wall.
- the motion transmission or motion detection is performed by a closed wall of the sensor housing. This is done according to the invention magnetically.
- the membrane housing is preferably detachable, more preferably connected via a bayonet coupling with the sensor housing, optionally a seal can be arranged between the membrane and sensor housing. This may optionally be formed integrally with the diaphragm housing or the sensor housing.
- the detachable connection allows easy installation and easy disassembly for maintenance or repair purposes.
- the membrane housing is closed at its upper end by the sensor housing.
- a closed volume of air is formed in the membrane housing, which serves the displacement of water during immersion of the membrane housing in the water.
- the fact that the membrane housing is closed by the sensor housing at the top it is reliably prevented that water can penetrate into the interior of the diaphragm housing. Penetrating water would impair or block the function of the sensor. Such an intrusion would be for example at a full run of the container, to be feared for example in case of failure of the pump.
- the sensor housing is designed to be closed relative to the diaphragm housing and a magnetic coupling is provided between the sensor or switch in the sensor housing and the diaphragm or an actuating element arranged in the diaphragm housing in motion-coupled with the diaphragm.
- This embodiment makes it possible to form the sensor housing completely sealed relative to the diaphragm housing, in particular by means of a closed wall of the sensor housing.
- the magnetic coupling makes it possible to detect the movement or deformation of the membrane through the closed wall.
- a first magnet can be arranged on the membrane or a component coupled to the motion of the membrane, the position of which is changed during movement of the membrane.
- This change in position of the magnet can be detected by a sensor, for example a reed contact in the interior of the sensor housing through the wall of the sensor housing, provided that the magnet and the magnetic sensor, ie, for example, the reed contact, are arranged in the vicinity of the wall of the sensor housing.
- the magnet and the magnetic field detecting sensor are arranged so that the magnetic field affects the sensor at least when a switching operation is to take place.
- at least one second magnet which is movable by the first magnet, may be arranged in the interior of the sensor housing. This second magnet can then directly or indirectly via other moving components with a switch or sensor inside the sensor housing be coupled.
- the second magnet can actuate by its movement a switch or switch contact, via which then the pump is switched on or off.
- a switch or switch contact via which then the pump is switched on or off.
- a switch or Druckakt directly turn on or off the pump or it may be interposed a control device which detects the switch signal and then controls the pump accordingly.
- the entire level sensor is designed as an assembly inserted into an opening of the container. This allows for easy installation, since the pre-assembled level sensor can be inserted into the opening of the container. Furthermore, the entire level sensor for maintenance and repair work can be easily removed from the container. In this case, the level sensor then releases the opening, which then allows access to the interior of the container in order to carry out further repair or maintenance work there, for example.
- a seal is arranged between the level sensor and the surrounding wall of the container, so that when inserted level sensor, the opening is sealed. This prevents water from spilling out of the opening in the event that the container is completely full.
- the sensor housing is fixed in or at the opening of the container.
- the sensor housing may be bolted to the container surrounding the wall opening.
- a bayonet coupling would be conceivable.
- the opening is provided surrounding the container wall, a thread into which the sensor housing is screwed with a corresponding thread.
- the efestungsconcee wastewater lifting plant has a container 2, which is preferably made of plastic.
- the container 2 has in at least one wall at least one inlet opening 4, to which an input-side sewer line can be connected, through which wastewater flows into the interior of the container 2.
- a pump 6 is also provided in the container 2.
- the pump 6 serves to pump the waste water from the container 2 via the outlet line 7 arranged in the container and the outlet connection 8 provided in the container 2 into a pressure or wastewater line connected to the outlet connection 8.
- an opening 12 is formed, in which a level sensor 14 is inserted.
- This level sensor 14 is based on the FIGS. 2 to 5 described in more detail.
- the level sensor 14 has at its upper end a sensor housing 16, which is inserted into the opening 12.
- a tubular membrane housing 20 extends in the vertical direction X down.
- the membrane housing 20 is at its lower open end closed by a movable or deformable membrane 22.
- the membrane 22, which may be formed of an elastomeric material, for example, is fixed by a retaining ring 24 at the lower end of the tubular membrane housing 20.
- the retaining ring 24 surrounds the membrane housing 20 circumferentially and is releasably fixed to the membrane housing 20 with a bayonet coupling. By removing the retaining ring 24 from the membrane housing 20, the membrane 22 can be removed from the membrane housing 20.
- the membrane 22 is positively fixed or clamped between the diaphragm housing 20 and the retaining ring 24. At the same time, the membrane 22 with its circumferential thickening 26 simultaneously forms a seal, with the result that the membrane 22 tightly seals the membrane housing 20 at the bottom.
- the diaphragm housing 20 is closed by the sensor housing 16.
- the sensor housing 16 engages in the upper axial end of the diaphragm housing 20.
- a sealing ring 28 is arranged for sealing. In this way, an enclosed volume of gas or air is defined inside the membrane housing 20.
- a vertically extending actuating rod 30 is arranged, which has at its lower end a plate-shaped extension 32 which rests flat against the inside of the membrane 22.
- the plate-shaped extension 32 rests loosely on the membrane 22.
- they are firmly connected to each other, for example, glued together.
- the actuating rod 30 is guided in a vertically extending sleeve 34 in the sensor housing 16.
- the sleeve 34 is completely closed to the sensor housing 16 and forms part of a wall of the sensor housing 16, so that the interior of the sleeve 34 is sealed by the wall of the sleeve relative to the interior 36 of the sensor housing 16.
- the sleeve 34 is in this example in one piece with the wall 38 of the sensor housing 16 beaut, which forms the underside of the sensor housing 16, which seals the end face of the diaphragm housing 20.
- the actuating rod 30 carries at its upper end, which hineinerstreckt into the sleeve 34, a permanent magnet 42.
- the permanent magnet 42 is movable with the actuating rod 30 in the vertical direction X in the sleeve 34.
- the electric switch 44 is arranged inside the sensor housing 16, the electrical switch 44 is arranged.
- the electric switch 44 can be actuated via a fork-shaped arm 46, which can be pivoted about a pivot axis 48 in the horizontal plane.
- the two legs 50 of the fork-shaped arm do not extend parallel but at an acute angle to each other.
- the two legs 50 each carry a permanent magnet, one leg 50 the permanent magnet 52 and the other leg 50, the permanent magnet 54.
- the arm 46 with the legs 50 is configured and pivotable about the pivot axis 48 that in the in Fig. 4 and 5 shown rest position of the permanent magnet 52 is located on the AuBenwandung the sleeve 34. In the second pivot position of this permanent magnet 52 is removed from the sleeve 34 and the second permanent magnet 54 is located on the opposite outer side of the sleeve 34th
- the actuating rod 30 is so movable with its permanent magnet in the sleeve 34 that, when the actuating rod 30 moves vertically upward, its permanent magnet 42 is moved between the permanent magnets 52 and 54.
- the permanent magnet 54 is arranged so that its magnetic south pole faces the magnetic north pole of the permanent magnet 42.
- the permanent magnet 52 is arranged exactly the opposite, so that its magnetic South pole facing the south pole of the permanent magnet 42. This causes that, when the permanent magnet 42 is displaced vertically by moving the operating rod 30 between the permanent magnets 52 and 54, the permanent magnet 54 is attracted to the permanent magnet 42, while the permanent magnet 52 is repelled by the permanent magnet 42.
- the operation of the level sensor shown is such that the level sensor is arranged in the container 2, that its lower end, ie the membrane 22 is located at least below an upper water level 56, so that the membrane 22 is immersed in the water.
- the membrane housing 20 with the membrane 22 displaces the water in the submerged area, whereby a pressure acting vertically upward on the membrane 22 is generated.
- This pressure causes the membrane 22 to move upwardly in the vertical direction X, thereby pushing the actuating rod 30 vertically upward, so that the permanent magnet 42 between the permanent magnets 52 and 54 is moved and causes the previously described switching operation.
- a receptacle 58 is formed at the lower end of the actuating rod 30 above the plate-shaped extension 32, on which weight elements 60 can be arranged.
- the weight elements 60 are ring-shaped, can be pushed onto the actuating rod 30 from above and are fixed in the receptacles 58 via latching hooks 62.
- the weight elements 60 may be formed, for example, as annular discs made of metal.
- the weight force generated by the weight elements 60 counteracts the water pressure acting from below on the membrane 22. In this way can be adjusted by adjusting the weight of the pressure at which the membrane 22 moves with the actuating rod 30 upwards.
- the switching threshold or water level 56 can be defined, in which the pump is turned on by the permanent magnet between the permanent magnets 52 and 54 is moved.
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)
- Level Indicators Using A Float (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Claims (12)
- Installation de relèvement d'eaux usées avec un contenant (2), une pompe et un capteur de niveau de remplissage (14) disposé dans le contenant (2), le capteur de niveau de remplissage (14) comportant un boîtier de membrane (20) fermé et disposé dans le contenant (2), qui comprend une membrane mobile (22) dans une paroi de boîtier, et la membrane (22) étant accouplée à l'intérieur du boîtier de membrane (20) à au moins un capteur ou commutateur (44) pour la mise en marche et l'arrêt de la pompe, caractérisée en ce que le boîtier de membrane (20) est relié à son extrémité supérieure à un boîtier de capteur (16) dans lequel est disposé le commutateur (44) ou le capteur, le boîtier de capteur (16) étant conçu de façon fermée par rapport au boîtier de membrane (20) et un accouplement magnétique entre le capteur ou commutateur (44) dans le boîtier de capteur (16) et la membrane (22) ou un organe d'actionnement (30) accouplé en mouvement à la membrane (22) et disposé dans le boîtier de membrane (20) étant prévu.
- installation de relèvement d'eaux usées selon la revendication 1, caractérisée en ce que la membrane (22) est disposée sur le côté inférieur du boîtier de membrane (20).
- Installation de relèvement d'eaux usées selon la revendication 1 ou 2, caractérisée en ce que la membrane (22) est reliée au boîtier de membrane (20) de manière détachable, notamment à l'aide d'un accouplement à la baïonnette.
- installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce que le boîtier de membrane (20) est configuré avec la membrane (22) et disposé dans le contenant (2) de manière telle que la membrane (22) soit située, lors du fonctionnement de l'installation de relèvement d'eaux usées, verticalement en-dessous d'un niveau d'eau maximal (56) dans le contenant (2).
- Installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce qu'un organe d'actionnement (30) est disposé à l'intérieur du boîtier de membrane (20) d'une manière telle qu'il transmette un mouvement de la membrane (22) au commutateur (44).
- Installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce qu'il est formé sur la membrane (22) ou sur un composant (30) accouplé en mouvement à la membrane (22), au moins une réception (58) pour un ou plusieurs éléments de poids (60).
- Installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce que la membrane (22) et les composants (30) accouplés en mouvement à elle sont conformés d'une manière telle qu'ils soient soumis dans l'eau à une force de flottabilité.
- Installation de relèvement d'eaux usées selon la revendication 6, caractérisée en ce qu'il est prévu au moins un élément de poids (60) qui est attaché de manière amovible à la réception (58).
- Installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce que le boîtier de membrane (20) est relié au boîtier de capteur (16) de manière détachable, de préférence à l'aide d'un accouplement à la baïonnette.
- Installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce que le boîtier de membrane (20) est fermé à son extrémité supérieure par le boîtier de capteur (16).
- Installation de relèvement d'eaux usées selon l'une des revendications précédentes, caractérisée en ce que le capteur de niveau de remplissage (14) est conformé comme une unité de construction insérée dans une ouverture (12) du contenant (2).
- Installation de relèvement d'eaux usées selon la revendication 11, caractérisée en ce que le boîtier de capteur (16) est fixé dans ou sur l'ouverture (12) du contenant (2).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11001253.1A EP2489800B1 (fr) | 2011-02-16 | 2011-02-16 | Installation de relèvement d'eaux usées |
RU2012105352/13A RU2587551C2 (ru) | 2011-02-16 | 2012-02-15 | Установка для перекачки сточных вод |
CN201210037431.6A CN102644317B (zh) | 2011-02-16 | 2012-02-16 | 废水提升装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11001253.1A EP2489800B1 (fr) | 2011-02-16 | 2011-02-16 | Installation de relèvement d'eaux usées |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2489800A1 EP2489800A1 (fr) | 2012-08-22 |
EP2489800B1 true EP2489800B1 (fr) | 2016-08-17 |
Family
ID=44237167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11001253.1A Active EP2489800B1 (fr) | 2011-02-16 | 2011-02-16 | Installation de relèvement d'eaux usées |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2489800B1 (fr) |
CN (1) | CN102644317B (fr) |
RU (1) | RU2587551C2 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3018294B1 (fr) * | 2014-03-05 | 2016-03-25 | Victor Jean Ballestra | Siphon demontable |
DE102018207243A1 (de) * | 2018-05-09 | 2019-11-14 | KSB SE & Co. KGaA | Abwasserhebeanlage |
FR3109632B1 (fr) * | 2020-04-23 | 2023-10-06 | Victor Jean Ballestra | Dispositif de détection d’une pression amélioré |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922002A (en) * | 1958-03-10 | 1960-01-19 | Morris A Gilman | Liquid level control |
US4617806A (en) * | 1984-09-05 | 1986-10-21 | Hoshizaki Electric Co., Ltd. | Liquid level control apparatus |
US5152670A (en) * | 1990-04-19 | 1992-10-06 | Waldecker Donald E | Sump system |
CN2140236Y (zh) * | 1992-09-29 | 1993-08-18 | 成都科技大学 | 便携式自动报警截流输液器 |
CN2480972Y (zh) * | 2001-06-07 | 2002-03-06 | 陈晓云 | 磁控双稳态开关 |
AU2003215312B2 (en) * | 2002-02-15 | 2008-12-18 | Crane Pumps & Systems Pft Corp. | Enclosed pump switch level control system |
CN2697606Y (zh) * | 2004-05-10 | 2005-05-04 | 姜廷良 | 无级显示与控制水位传感器 |
DE102005060556A1 (de) * | 2005-12-17 | 2007-08-16 | Ksb Aktiengesellschaft | Abwasserhebeanlage |
CN2886086Y (zh) * | 2006-01-24 | 2007-04-04 | 郑州奥特车辆科技有限公司 | 重力平衡式油箱油位传感器 |
-
2011
- 2011-02-16 EP EP11001253.1A patent/EP2489800B1/fr active Active
-
2012
- 2012-02-15 RU RU2012105352/13A patent/RU2587551C2/ru active
- 2012-02-16 CN CN201210037431.6A patent/CN102644317B/zh active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
RU2587551C2 (ru) | 2016-06-20 |
CN102644317A (zh) | 2012-08-22 |
CN102644317B (zh) | 2015-03-04 |
EP2489800A1 (fr) | 2012-08-22 |
RU2012105352A (ru) | 2013-08-20 |
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