EP0623751A1 - Pompe avec soupape anti-retour - Google Patents

Pompe avec soupape anti-retour Download PDF

Info

Publication number
EP0623751A1
EP0623751A1 EP94104841A EP94104841A EP0623751A1 EP 0623751 A1 EP0623751 A1 EP 0623751A1 EP 94104841 A EP94104841 A EP 94104841A EP 94104841 A EP94104841 A EP 94104841A EP 0623751 A1 EP0623751 A1 EP 0623751A1
Authority
EP
European Patent Office
Prior art keywords
pump
outlet pipe
outlet
backflow preventer
ventilation device
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
EP94104841A
Other languages
German (de)
English (en)
Other versions
EP0623751B1 (fr
Inventor
Manfred Deussen
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
Priority claimed from DE4320422A external-priority patent/DE4320422A1/de
Application filed by KSB AG filed Critical KSB AG
Publication of EP0623751A1 publication Critical patent/EP0623751A1/fr
Application granted granted Critical
Publication of EP0623751B1 publication Critical patent/EP0623751B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps

Definitions

  • the invention relates to a backflow preventer on the outlet pipe of a pump, the outlet pipe, which is arranged essentially vertically and flows through from bottom to top, opens into a container.
  • the outlet opening of the pump should be arranged at a slightly higher level than the highest liquid level in the container.
  • a delivery head portion must be applied to ensure backflow prevention so that the pump cannot flow back out of the container when the pump is at a standstill.
  • the fill level in the container is different, further losses occur, which lead to uneconomical operation.
  • the invention is based on the problem of producing an energy-saving, reliable and inexpensive design for a pump outlet.
  • the ventilation device ventilates the coaxial siphon and prevents backflow from the container.
  • the outlet pipe can be part of a pump shaft receiving a submersible motor pump as well as part of an outlet pipe of a vertical shaft pump.
  • the bell-shaped hood is arranged axially offset with respect to the outlet pipe.
  • the main outflow direction of the siphon can be pre-embossed.
  • the outlet pipe is arranged in the vicinity of a lateral wall surface of a basin. Interfering flow influences from the wall surface can thus be compensated for by the axial offset of the bell-shaped hood.
  • the ventilation device is designed as a controlled device or a device that can be influenced by the pumped medium.
  • Various forms of ventilation equipment can be used here.
  • a mechanism reacting to external influences can control the function of the ventilation device.
  • the aeration devices which can be influenced by the pumped medium react to the pressure conditions and / or the flow conditions within the backflow preventer.
  • These can be the various known types of fittings or ventilation devices that do not require any moving parts and only have area ratios of ventilation pipes and openings.
  • the ventilation device can be controlled by the electrical and / or mechanical behavior of the pump drive motor.
  • the ventilation device can be controlled by monitoring the speed or the current consumption of a motor can be determined whether there is an undesired ventilation of the siphon. Sudden changes in these values allow this conclusion.
  • a further embodiment provides for the use of soft-sealing fittings as a ventilation device.
  • These can be influenced by the flow and, due to the soft seal, have the advantage of a low-noise actuation and a reliable function even with impurities in the medium.
  • these can also be arranged at different points on the hood or the outlet pipe. The position to be selected depends on the type and the type of interruption of the backflow desired.
  • the ventilation device is designed as an open tube. This extends according to the direction of the outlet pipe.
  • this solution is characterized by the lack of moving and therefore fault-prone components. There is also no maintenance required, since any impurities that may build up inside the pipe are sucked off during a ventilation process.
  • the tube which acts as a ventilation device, is dimensioned with regard to its installation position and cross sections so that the outside air is excluded during pump operation and safe ventilation is ensured when the pump is switched off.
  • 1 and 2 show different forms of ventilation devices.
  • a pump 2 is installed within a shaft pipe 1.
  • the shaft pipe 1 with the pump 2 projects into a container 3, from which the water is sucked in through an inlet opening 4.
  • the pump 2 pumps through the shaft pipe 1 into an outlet pipe 5, from which the pumped medium flows through an outlet opening 6 into a container 7.
  • the liquid level within the container can reach a maximum liquid level 8 and a minimum liquid level 8 '.
  • a bell-shaped hood 9 is placed over the outlet opening 6 of the outlet pipe 5, with the aid of which a siphon is produced in the region of the outlet opening 6.
  • This siphon can be designed coaxially or with an axial offset of the two parts forming the siphon. The latter enables a preferred outflow direction to be predetermined. This results in an arrangement with a streamlined outflow for energy-saving pump operation. Due to this solution, a minimum of investment costs can also be expected, since simple prefabricated parts or so-called semi-finished products can be used for this.
  • fittings are arranged here as one of several possible ventilation devices 10. These are pressed into their closed position by the emerging medium and have the property of opening when the flow reverses and thus ventilating the interior of the hood 9. This would immediately interrupt the lifting action and prevent backflow.
  • Soft sealing check valves are a simple solution for the fittings.
  • an open ventilation pipe is used as the ventilation device 10.
  • the ventilation device 10 is attached in an airtight manner in the hood 9 in a vertical installation position.
  • the attachment can be fixed or adjustable in height.
  • the lower opening 11 of the ventilation pipe opens here into the outlet pipe 5 and the upper opening 12 is located above the maximum liquid level 8.
  • this type of ventilation device 10 is matched to the operational data of the system. Between the maximum and minimum operating points of the pump 2, the ventilation device 10 is filled with liquid, but the liquid cannot escape from the pipe. This is because the upper opening 12 is located above the pressure level which is established. During normal operation, a liquid level will be established inside the tube above the edge of the lower opening 12, which thus ensures the safe closure of the atmospheric air.
  • liquid can escape from the upper opening 12 until the entire system is completely filled or vented.
  • a hood via the upper opening 12. This is then arranged so that the full cross section to the outside air is preserved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP94104841A 1993-04-08 1994-03-28 Pompe avec soupape anti-retour Expired - Lifetime EP0623751B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4311745 1993-04-08
DE4311745 1993-04-08
DE4320422 1993-06-21
DE4320422A DE4320422A1 (de) 1993-04-08 1993-06-21 Rückflußverhinderer für Pumpenauslaufrohre

Publications (2)

Publication Number Publication Date
EP0623751A1 true EP0623751A1 (fr) 1994-11-09
EP0623751B1 EP0623751B1 (fr) 1996-10-30

Family

ID=25924800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104841A Expired - Lifetime EP0623751B1 (fr) 1993-04-08 1994-03-28 Pompe avec soupape anti-retour

Country Status (2)

Country Link
US (1) US5520510A (fr)
EP (1) EP0623751B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840000A (en) * 1954-12-22 1958-06-24 Frank V Gramenzi Automatic drainage device
GB2016947A (en) * 1979-03-13 1979-10-03 Boc Ltd Removing gas from liquid
GB2134940A (en) * 1982-12-15 1984-08-22 Michael Robert Jupp Drainage gully trap
EP0118403A1 (fr) * 1983-02-15 1984-09-12 Flygt AB Dispositif dans le tuyau d'émission d'une pompe pour éviter des courants contraires

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE362696C (de) * 1922-10-31 Gustav Ernst A Beflutungsvorrichtung an Kolben-, Plunger- oder Membranpumpen
DE274394C (fr) *
US1003905A (en) * 1910-10-15 1911-09-19 Arthur F Randall Apparatus for producing illusory effects.
DE543770C (de) * 1927-02-19 1932-02-09 Harry Sauveur Dipl Ing Vorrichtung zur Reinhaltung der Saugoeffnung von unter dem Fluessigkeitsspiegel arbeitenden Pumpen von Gas und Sand
DE659106C (de) * 1935-09-07 1938-04-25 Escher Wyss Maschinenfabrik G Einrichtung an einer Pumpenanlage, insbesondere Schoepfwerksanlage
US2211526A (en) * 1938-02-21 1940-08-13 Storey Norman Choate Pump
AT166599B (de) * 1945-12-05 1950-08-25 Anton Dipl Ing Dr Grzywienski Bauverfahren zur Herstellung einer Betonkammer für Wasserturbinen
US3174434A (en) * 1963-06-24 1965-03-23 Tait Mfg Co The Sump pump
US3251303A (en) * 1963-09-13 1966-05-17 William G Mason Anti-cavitation structure for sink drains and the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840000A (en) * 1954-12-22 1958-06-24 Frank V Gramenzi Automatic drainage device
GB2016947A (en) * 1979-03-13 1979-10-03 Boc Ltd Removing gas from liquid
GB2134940A (en) * 1982-12-15 1984-08-22 Michael Robert Jupp Drainage gully trap
EP0118403A1 (fr) * 1983-02-15 1984-09-12 Flygt AB Dispositif dans le tuyau d'émission d'une pompe pour éviter des courants contraires

Also Published As

Publication number Publication date
US5520510A (en) 1996-05-28
EP0623751B1 (fr) 1996-10-30

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