EP2489800A1 - Installation de relèvement d'eaux usées - Google Patents

Installation de relèvement d'eaux usées Download PDF

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Publication number
EP2489800A1
EP2489800A1 EP11001253A EP11001253A EP2489800A1 EP 2489800 A1 EP2489800 A1 EP 2489800A1 EP 11001253 A EP11001253 A EP 11001253A EP 11001253 A EP11001253 A EP 11001253A EP 2489800 A1 EP2489800 A1 EP 2489800A1
Authority
EP
European Patent Office
Prior art keywords
membrane
housing
sensor
container
plant according
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
Application number
EP11001253A
Other languages
German (de)
English (en)
Other versions
EP2489800B1 (fr
Inventor
Ralf Schomäcker
Luca Casalini
Alessandro Iacoponi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP11001253.1A priority Critical patent/EP2489800B1/fr
Priority to RU2012105352/13A priority patent/RU2587551C2/ru
Priority to CN201210037431.6A priority patent/CN102644317B/zh
Publication of EP2489800A1 publication Critical patent/EP2489800A1/fr
Application granted granted Critical
Publication of EP2489800B1 publication Critical patent/EP2489800B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • the wastewater lifting plant according to the invention also has a container which is provided with at least one inlet opening. At this inlet opening, an input-side sewer line can be connected, through which to be lifted wastewater flow into the container.
  • 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 it necessary to turn on the pump.
  • 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 elements 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 preferably 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 from the arranged in the diaphragm housing movable components or the membrane on the switch or sensor inside the sensor housing can be effected through an opening in a wall of the sensor housing, wherein the opening may be preferably provided with a seal.
  • 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 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 a control device is interposed, 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 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.
  • 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 integrally formed in this example with the wall 38 of the sensor housing 16, 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 outer wall of 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)
EP11001253.1A 2011-02-16 2011-02-16 Installation de relèvement d'eaux usées Active EP2489800B1 (fr)

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 true EP2489800A1 (fr) 2012-08-22
EP2489800B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2915928A1 (fr) * 2014-03-05 2015-09-09 Victor Jean Ballestra Siphon démontable
FR3109632A1 (fr) * 2020-04-23 2021-10-29 Victor Jean Ballestra Dispositif de détection d’une pression amélioré

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018207243A1 (de) * 2018-05-09 2019-11-14 KSB SE & Co. KGaA Abwasserhebeanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922002A (en) * 1958-03-10 1960-01-19 Morris A Gilman Liquid level control
US5152670A (en) * 1990-04-19 1992-10-06 Waldecker Donald E Sump system
WO2003071133A1 (fr) * 2002-02-15 2003-08-28 Crane Pumps & Systems, Inc. Systeme integre de reglage du niveau de l'interrupteur de la pompe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617806A (en) * 1984-09-05 1986-10-21 Hoshizaki Electric Co., Ltd. Liquid level control apparatus
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922002A (en) * 1958-03-10 1960-01-19 Morris A Gilman Liquid level control
US5152670A (en) * 1990-04-19 1992-10-06 Waldecker Donald E Sump system
WO2003071133A1 (fr) * 2002-02-15 2003-08-28 Crane Pumps & Systems, Inc. Systeme integre de reglage du niveau de l'interrupteur de la pompe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2915928A1 (fr) * 2014-03-05 2015-09-09 Victor Jean Ballestra Siphon démontable
FR3018294A1 (fr) * 2014-03-05 2015-09-11 Victor Jean Ballestra Siphon demontable
FR3109632A1 (fr) * 2020-04-23 2021-10-29 Victor Jean Ballestra Dispositif de détection d’une pression amélioré

Also Published As

Publication number Publication date
RU2587551C2 (ru) 2016-06-20
EP2489800B1 (fr) 2016-08-17
CN102644317A (zh) 2012-08-22
CN102644317B (zh) 2015-03-04
RU2012105352A (ru) 2013-08-20

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