EP0908912A2 - Interrupteur à flotteur - Google Patents

Interrupteur à flotteur Download PDF

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Publication number
EP0908912A2
EP0908912A2 EP98118949A EP98118949A EP0908912A2 EP 0908912 A2 EP0908912 A2 EP 0908912A2 EP 98118949 A EP98118949 A EP 98118949A EP 98118949 A EP98118949 A EP 98118949A EP 0908912 A2 EP0908912 A2 EP 0908912A2
Authority
EP
European Patent Office
Prior art keywords
magnet
float
switch
electric motor
submersible pump
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.)
Withdrawn
Application number
EP98118949A
Other languages
German (de)
English (en)
Other versions
EP0908912A3 (fr
Inventor
Klaus Dr. Wagner
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Publication of EP0908912A2 publication Critical patent/EP0908912A2/fr
Publication of EP0908912A3 publication Critical patent/EP0908912A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/02—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0073—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by relative movement between two magnets

Definitions

  • the invention relates to a float switch for switching on and off an electric motor, in particular for a submersible pump unit, with a by a float depending on the liquid level in its position to be changed first magnet, which with a second, by a non-magnetic wall corresponds to magnets separated from it in such a way that the one acting on the switch of the electric motor Actuator connected second magnet through the approaching first Magnets from a first, taken in the unaffected state Switch position is moved to a second switch position.
  • Such a float switch is known from EP 0 050 063 B1.
  • He can be realized in different ways.
  • the Float can be arranged in a housing or on an axis so that it performs a vertical movement.
  • the swimmer can also do one by one Axis of rotation can be pivoted arm, the first magnet either on this arm or by means of a part carrying it on a pivoting movement executing shaft is attached.
  • the first magnet like that Swimmer, moved on an arc-shaped track.
  • the second magnet which is behind a non-magnetic wall, becomes attracted by the approaching first magnet.
  • a switch or Activated microswitch via which the electric motor is switched on.
  • the electric motor is switched on.
  • the switch is opened, the electric motor is switched off.
  • the float switches mentioned are mainly used in submersible pump units used. They have proven themselves, especially the Circumstances that they do not need a sealing point in the wall of the unit to theirs Reliability helps.
  • submersible pump units are not generally combined with one Float switch equipped. While the float switch is on automatic pumping, for example from a pit, without further Monitoring enables submersible pump units in other applications needed that allow targeted switching on and off.
  • the invention has for its object a float switch of the beginning to create the type mentioned, which works with the same reliability as the previously known float switch, but when removing the float and the magnets connected to it allow the electric motor to be switched on and off.
  • the object is achieved in that the two Magnets repel each other, with the first magnet on one on one predetermined lower liquid level lowered float into a second magnet repelling position arrives, whereby the of the non-magnetic wall moved second magnet over the actuator and the switch designed as an opener switches off the electric motor.
  • the position of the inner one unaffected by the first or outer magnet or second magnet is the switch-on position in the solution according to the invention. Therefore, after removing the outside of the housing or the non-magnetic wall parts of the float switch of the electric motor switched on and off manually or by any other actuation become. This opens z. B. the possibility of an optional use of a Submersible pump unit with or without a float switch without Changes must be made within the unit housing. In order to the advantage for the manufacturer and the dealer is reduced Warehousing. The user has the advantage of having the same unit for different ones To be able to use cases.
  • the submersible pump unit shown in Fig. 1 consists essentially from a housing 1 and an electric motor 2 arranged therein, which has a Shaft 3 drives a centrifugal pump impeller 4.
  • a float 6 On the outside of the housing 1 is a float 6 arranged on an arm 5 is provided.
  • the arm 5 is on one Fixed shaft 7, which in a on the housing 1 of the submersible pump unit mounted housing 8 is mounted.
  • a Magnetic carrier 9 With the shaft 7 is a Magnetic carrier 9, which receives a magnet 10, rotatably connected.
  • a Screw 11 can position the float 6 relative to the magnet 10 to be changed. This is an adjustment of the liquid level dependent switching positions of the float switch possible.
  • Parts 5 to 11 of the float switch, which are all outside of the housing 1 are in the known embodiment of FIGS. 1 and 2 and 3 embodiment of the same type in principle. They are therefore provided with the same reference numerals in the three figures.
  • the remaining parts of the float switch are located within the housing 1.
  • the two differ in their type, arrangement and function Executions from each other.
  • a second, inner magnet 12 used the opposite polarity to the magnet 10 arranged outside has, so that the two magnets 10 and 12 when approaching each other attract each other.
  • the magnet 12 is attached to a rocker arm 13, which at an approximation of the magnet 12 to that of a non-magnetic material existing wall of the housing 1 actuated a microswitch 14. Since the Microswitch 14 is a so-called "make contact", when it is actuated Electric motor 2 switched on. This is the case when the float 6 is in the predetermined switch-on height, if the magnet 10 is in such a position Proximity to the magnet 12 is that the attraction of the magnets 10 and 12 increases begins to work.
  • Float switches according to the invention are of a similar type to parts 12 to 14 of the known embodiment shown in FIGS. 1 and 2, they differ differ in their concrete design and function. So owns the magnet 15 of the embodiment according to the invention has the same polarity as that externally arranged magnet 10, so that the two magnets 10 and 15 are repulsive interact.
  • the rocker arm 16 carrying the magnet 15 is arranged that he actuates the microswitch 17 in the position of the magnet 15 remote from the wall.
  • the microswitch 17 is a so-called "opener", i. H. he switches the Electric motor 2 off when the magnet 15 through the approaching magnet 10 is pushed away from the wall of the housing 1. This is the case if the The float is in the lowered, i.e. the off position.
  • the submersible pump unit is then switched on again when the magnet 10 when the float 6 is lifted so far from the magnet 15 that whose repulsive effect is no longer effective.
  • the rocker arm 16 will now moved away from the microswitch 17 by the restoring force acting on it, whereby this is opened and the power supply to the electric motor 2 is released.
  • the microswitch 17 When removing the external parts 5 to 11 of the invention Float switch, the microswitch 17 remains in the permanently open position, so that the submersible pump unit in the manner of a known unit without Float switch can be operated. So it can be done only through the Power supply can be switched on and off.

Landscapes

  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
EP98118949A 1997-10-13 1998-10-07 Interrupteur à flotteur Withdrawn EP0908912A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19745184 1997-10-13
DE1997145184 DE19745184A1 (de) 1997-10-13 1997-10-13 Schwimmerschalter

Publications (2)

Publication Number Publication Date
EP0908912A2 true EP0908912A2 (fr) 1999-04-14
EP0908912A3 EP0908912A3 (fr) 2000-03-15

Family

ID=7845406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118949A Withdrawn EP0908912A3 (fr) 1997-10-13 1998-10-07 Interrupteur à flotteur

Country Status (2)

Country Link
EP (1) EP0908912A3 (fr)
DE (1) DE19745184A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004020377A1 (de) 2004-04-23 2005-11-10 Alstom Technology Ltd Verfahren zur Bearbeitung von Dichtungen nach Art der Lamellendichtungen
DE102004020378A1 (de) 2004-04-23 2005-11-10 Alstom Technology Ltd Lamellendichtung, insbesondere für eine Gasturbine, sowie Verfahren zu deren Herstellung
GB2413602B (en) 2004-04-26 2008-02-13 Alstom Technology Ltd Process for producing leaves for a leaf seal
DE102009015122A1 (de) 2009-03-31 2010-10-14 Alstom Technology Ltd. Lamellendichtung für eine Strömungsmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6751559U (de) * 1968-07-20 1969-02-06 Heinrich Kissling Fabrik Fuer Schwimmerschalter
FR2321178A1 (fr) * 1975-08-15 1977-03-11 Bestobell Mobrey Ltd Interrupteur electrique a commande magnetique, notamment interrupteur commande par un flotteur par l'intermediaire de deux aimants
GB1490266A (en) * 1975-02-21 1977-10-26 Bestobell Mobrey Ltd Float switch
EP0050063A1 (fr) * 1980-10-10 1982-04-21 Société Anonyme dite: Pompes Guinard Dispositif de déclenchement par aimant
DE4325620A1 (de) * 1993-07-30 1995-02-02 Ier Mes Und Regeltechnik Eberh Quecksilberfreier Schwimmschalter
EP0821165A1 (fr) * 1996-07-22 1998-01-28 Ksb S.A. Commande de mise en marche d'une pompe submersible

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6751559U (de) * 1968-07-20 1969-02-06 Heinrich Kissling Fabrik Fuer Schwimmerschalter
GB1490266A (en) * 1975-02-21 1977-10-26 Bestobell Mobrey Ltd Float switch
FR2321178A1 (fr) * 1975-08-15 1977-03-11 Bestobell Mobrey Ltd Interrupteur electrique a commande magnetique, notamment interrupteur commande par un flotteur par l'intermediaire de deux aimants
EP0050063A1 (fr) * 1980-10-10 1982-04-21 Société Anonyme dite: Pompes Guinard Dispositif de déclenchement par aimant
DE4325620A1 (de) * 1993-07-30 1995-02-02 Ier Mes Und Regeltechnik Eberh Quecksilberfreier Schwimmschalter
EP0821165A1 (fr) * 1996-07-22 1998-01-28 Ksb S.A. Commande de mise en marche d'une pompe submersible

Also Published As

Publication number Publication date
DE19745184A1 (de) 1999-04-15
EP0908912A3 (fr) 2000-03-15

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