EP0594548B1 - Vorrichtung zur automatischen Zirkulation in Abwasserpumpstation - Google Patents

Vorrichtung zur automatischen Zirkulation in Abwasserpumpstation Download PDF

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Publication number
EP0594548B1
EP0594548B1 EP93850173A EP93850173A EP0594548B1 EP 0594548 B1 EP0594548 B1 EP 0594548B1 EP 93850173 A EP93850173 A EP 93850173A EP 93850173 A EP93850173 A EP 93850173A EP 0594548 B1 EP0594548 B1 EP 0594548B1
Authority
EP
European Patent Office
Prior art keywords
valve
chamber
pump
pressure
circulation
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.)
Expired - Lifetime
Application number
EP93850173A
Other languages
English (en)
French (fr)
Other versions
EP0594548A1 (de
Inventor
Folke Landquist
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.)
Xylem Water Solutions AB
Original Assignee
ITT Flygt AB
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 ITT Flygt AB filed Critical ITT Flygt AB
Publication of EP0594548A1 publication Critical patent/EP0594548A1/de
Application granted granted Critical
Publication of EP0594548B1 publication Critical patent/EP0594548B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves

Definitions

  • the invention concerns a device for providing circulation in pumping stations which are parts of a municipal sewage system.
  • Sludge banks occur in pumping stations and other tanks in a sewage system as the circulation is not good enough. Sludge banks mean a lot of problems such as a bad smell, risk for explosions, corrosion problems etc.
  • the problems have been solved by arranging a valve in the pump outlet, which is opened temporarily thus obtaining a circulation and flushing in the pumping station.
  • the sludge banks are dissolved and the fluid is homogenized.
  • the purpose of this invention is to obtain a device which in a simple and reliable way controls the valve and which is less sensitive to clogging. This is obtained by help of the method and the device stated in the claims.
  • Fig 1 shows a pumping station with a pump unit and attached valve.
  • Figs 2 to 4 show the principle design of the valve in different operating positions.
  • FIG. 1 stands for a pumping station with a submersible pump unit 2 connected to a pressure pipe 3.
  • 4 stands for the pump housing having an inlet 5
  • 6 stands for a mixing valve mounted on the pump housing 4.
  • 7 stands for a cylindric part of the valve 6 and 8 its outlet.
  • 9 stands for a pressure connection from the pump housing 4, 10 a membrane housing with a membrane 11 which parts two chambers 12 and 13.
  • 14 stands for a partition wall having an opening 15, 16 an additional chamber, 17 a flexible wall, 18 a valve flap having a leading edge and 20 finally a valve seat.
  • the device operates in the following manner: Normally the valve 6 is closed and the pumped medium is transported from the pump housing 4 and into the pressure pipe 3. The flow direction is shown by the Arrow A.
  • valve is open, which means that a certain amount of the pumped medium flows through the valve, arrow B, and obtains a strong agitation in the pump station wrenching possible sludge banks. After a certain time, the valve is closed and the pumping takes place in the normal way.
  • the valve 6 comprises a cylindric part 7 and an outlet 8.
  • a pressure pipe 9 from the pump housing 4 is connected to the cylindric part 7 via a membrane housing 10 having a first chamber 12.
  • the pressure therein acts upon a membrane 11 which in its turn influences on the pressure in another chamber 13 containing a dampening medium such as oil.
  • the chamber 13 is further limited by a wall 14 provided with a narrow opening 15 creating a connection with a second oil chamber 16.
  • the latter has a flexible wall 17 arranged to be able to act upon a valve flap 18 for a temporary closing of the valve 6.
  • Fig 2 shows the valve in an open position which means that circulation is taking place in the pumping station.
  • the valve flap 18 then takes a position entirely beside the flow. This is the situation at pump start.
  • the pressure in the pump outlet thus acts upon the flap 18 via the chamber 12, the membrane 11 the chamber 13 the opening 15 and the chamber 16.
  • the time before which the flap is being closed may be decided by dimensioning the opening 15. The smaller opening, the longer time before enough oil has flown into the chamber 16 to obtain a sufficient force onto the flap 18.
  • the suitable opening time may vary depending on the type of pump station and is preferably possible to adjust from outside.

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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Claims (3)

  1. Vorrichtung zum Schaffen einer automatischen Zirkulation in Abwasser-Pumpstationen, die eine oder mehrere Pumpeneinheiten enthalten, vorzugsweise Zentrifugalpumpen des tauchbaren Typs, wobei eine oder mehrere derselben mit Mischventilen versehen sind, die während einer bestimmten, begrenzten Zeitdauer oder Zeitdauern die Druckseite einer Pumpe automatisch mit einer Pumpstation (1) verbinden, um dadurch eine Zirkulation des Pumpmediums zu erhalten, und wobei die alternative Rückverbindung zu der Pumpstation (1) über ein Ventil (6) erfolgt, das ein Gehäuse (10) aufweist, das über ein Rohr (9) mit der Druckseite der Pumpe verbunden ist,
    dadurch gekennzeichnet,
    daß sie ein Gehäuse (10) aufweist, das mit einem zylindrisch ausgebildeten Teil (7) des Ventils (6) verbunden ist und eine Membran (11) enthält, deren eine Seite von dem Druck in dem Pumpengehäuse (4) beaufschlagt wird, während ihre andere Seite eine Wand einer Kammer (13) bildet, die ein Dämpfungsmedium, wie Öl, enthält, sowie eine unter Federvorspannung stehende Ventilklappe (18) aufweist, die in dem zylindrisch ausgebildeten Teil (7) des Ventils angebracht ist und zum Schließen des Ventils und Unterbrechen der Zirkulation ausgelegt ist, wobei die Ventilklappe (18) derart ausgebildet ist, daß sie sich entgegen der Federkraft durch den durch die Membran (11) gesteuerten Druck in der Kammer (13) direkt oder indirekt in einer Schließrichtung bewegen läßt.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß die Kammer (13) über eine Öffnung (15) mit einer weiteren Kammer (16) verbunden ist, die eine flexible Wand (17) aufweist, die dazu ausgelegt ist, in Schließrichtung auf die Ventilklappe (18) zu wirken.
  3. Vorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, daß die Öffnung (15) verstellbar ist, um die Zeit zu steuern, zu der der Druck in der Kammer (16) ausreichend stark ist, um die Ventilklappe (18) durch das Ventil (6) nach außen in die Strömung hineinzuschwenken und dadurch die Zirkulation zu unterbrechen.
EP93850173A 1992-09-24 1993-09-08 Vorrichtung zur automatischen Zirkulation in Abwasserpumpstation Expired - Lifetime EP0594548B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9202759A SE469844B (sv) 1992-09-24 1992-09-24 Anordning för att åstadkomma cirkulation i pumpstationer
SE9202759 1992-09-24

Publications (2)

Publication Number Publication Date
EP0594548A1 EP0594548A1 (de) 1994-04-27
EP0594548B1 true EP0594548B1 (de) 1997-08-13

Family

ID=20387260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93850173A Expired - Lifetime EP0594548B1 (de) 1992-09-24 1993-09-08 Vorrichtung zur automatischen Zirkulation in Abwasserpumpstation

Country Status (3)

Country Link
EP (1) EP0594548B1 (de)
DE (1) DE69313069T2 (de)
SE (1) SE469844B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4415233C1 (de) * 1994-04-30 1995-12-14 Abs Pumps Ltd Spülventil
IT1314629B1 (it) * 2000-05-12 2002-12-20 Zenit Spa Valvola di flussaggio
CN107288921A (zh) * 2017-08-08 2017-10-24 苏州克莱尔环保科技有限公司 搅碎式提升泵站

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EP-A- 0 058 648 *
EP-A- 0 384 903 *
EP-A- 0 472 509 *

Also Published As

Publication number Publication date
EP0594548A1 (de) 1994-04-27
SE9202759D0 (sv) 1992-09-24
SE9202759L (sv) 1993-09-27
SE469844B (sv) 1993-09-27
DE69313069T2 (de) 1998-02-19
DE69313069D1 (de) 1997-09-18

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