EP2025943A2 - Système de pompe - Google Patents

Système de pompe Download PDF

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Publication number
EP2025943A2
EP2025943A2 EP08252693A EP08252693A EP2025943A2 EP 2025943 A2 EP2025943 A2 EP 2025943A2 EP 08252693 A EP08252693 A EP 08252693A EP 08252693 A EP08252693 A EP 08252693A EP 2025943 A2 EP2025943 A2 EP 2025943A2
Authority
EP
European Patent Office
Prior art keywords
motor
pump
pump system
controller
electric current
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Withdrawn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
EP08252693A
Other languages
German (de)
English (en)
Inventor
Andrew Moore
Craig Wroth
Steve Watt
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.)
NOV Process and Flow Technologies UK Ltd
Original Assignee
Mono Pumps Ltd
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 Mono Pumps Ltd filed Critical Mono Pumps Ltd
Publication of EP2025943A2 publication Critical patent/EP2025943A2/fr
Withdrawn legal-status Critical Current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
    • F04D15/02—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
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/006—Pneumatic sewage disposal systems; accessories specially adapted therefore
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • 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
    • F04D15/0077—Safety measures
    • 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
    • F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
    • 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
    • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • F04D15/0254—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being speed or load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating

Definitions

  • the present invention relates to a pump system for use in a pressure sewer system.
  • Pressure sewer systems are an alternative to a traditional gravity feed sewers and are particularly useful in areas where it is difficult and/or expensive to install a traditional gravity sewer mains, such as areas that are hilly, extremely flat, of environmental significance, built up or where minimum disruption is required.
  • each home may be provided with a sealed sewage collection tank into which waste from the home is passed. Periodically, the waste is pumped from the sewage collection tank under pressure through relatively small-bore pipes to a processing station. The pipes may follow the natural contour of the ground, resulting in considerable cost savings in installation and maintenance.
  • a problem with pressure sewer systems is that it is reliant on the correct functioning of the pumps provided for each sewage collection tank. Accordingly, reliability of the pumps is essential. However, the pumps may become damaged, for example if they attempt to operate when the pressure in the waste pipe leading to the processing station is too high.
  • the pressure in these pipes may vary depending on, for example, the number of pumps operating at a given instant to pump waste into the pipe. Therefore, there have previously been suggested ways of avoiding damage to the pump due to operation against too high a pressure. For example it has been known to monitor the temperature of the pump and to stop the pump if the temperature exceeds a given point because the temperature may damage the pump and may indicate an elevated pressure within the waste pipe. Alternatively, it has been proposed to monitor the pressure of the waste in the pipe leading to the processing station such that the pump may be controlled not to activate if the pressure is too high.
  • the present invention also provides a method of controlling a pump system for use in a pressure sewer system, said pump system comprising a pump, a cutter and an electric motor configured to drive the pump and the cutter; and the method comprising:
  • controlling the operation of the pump system based on the electric current provided to the electric motor advantageously provides a quick response to any increase in pressure in the discharge pipe.
  • the electric current drawn by the motor may be directly proportional to the pressure against which the pump is acting. Accordingly, the measurement of the electric current may provide an immediate measurement of the pressure within the discharge pipe.
  • the electric current sensor is not in contact with the sewage and accordingly, may be extremely reliable, requiring little or no routine maintenance.
  • the system of the present invention may detect such a blockage by monitoring the electric current. Accordingly, the system may be arranged such that if the electric current exceeds a given level, the motor is reversed by a given amount, such as a quarter turn, in order to unblock the cutter and/or pump.
  • the pump system controller may monitor the frequency with which the pump system is stopped due to an excess current being drawn by the electric motor and may be arranged to activate an alarm if the frequency is too high. This may occur, for example, if the cutter or pump becomes blocked and cannot be automatically unblocked by the system according to the present invention. Accordingly, the alarm may be an audible an/or visible alarm arranged to notify the resident of the property at which the pump system is installed and/or the company providing the pressure sewer system of the possible blockage.
  • the system may be configured such that if, after the alarm has been activated, the pump system succeeds in removing the blockage, namely the system is successfully re-started, the alarm is deactivated.
  • the system may be configured such that if, after the alarm is activated, the system is re-started and the current drawn by the electric motor does not exceed the threshold for a set period of time, the blockage is deemed to have been removed and the alarm is de-activated.
  • the pump may, in particular, be a positive displacement pump, such as a helical rotor pump with a rotating rotor in a rubber stator.
  • a positive displacement pump such as a helical rotor pump with a rotating rotor in a rubber stator.
  • the advantage of using such a pump is that it provides a relative constant flow versus the backpressure on the pump and the current drawn by the motor is directly proportional to the backpressure. Accordingly, monitoring the electric current drawn by the motor provides a measure of the pressure within the discharge pipe.
  • the cutter may, in particular, be a rotating serrated impeller.
  • the impeller may be provided with hammers which pull debris into the cutters.
  • the pump system may be installed within a pressure sewer system.
  • the pump system may be installed between a sewage store tank and a sewage pipe for conveying sewage under pressure to a treatment unit.
  • the pump system may be configured to periodically pump sewage from the sewage store tank into the sewage pipe.
  • the sewage store tank may include a level sensor system that measures the sewage level in the sewage store tank and the controller of the pump system may commence operation of the motor to pump sewage from the sewage store tank into the sewage pipe when the sewage level in the sewage store tank exceeds a predetermined level.
  • a plurality of properties 1,2,3,4, for example residential homes, may be connected to a discharge pipe 5 that passes sewage from each of the properties 1,2,3,4 to a sewage processing station 6.
  • Each of the properties 1,2,3,4 is provided with an associated sewage storage tank 11,12,13,14 into which waste from the properties is passed and that stores the sewage prior to pumping into the discharge pipe 5.
  • a pump system 21,22,23,24 is also associated with each of the properties 1,2,3,4 and is configured to periodically pump the sewage into the discharge pipe 5.
  • each pump system includes a pump 30 for pumping the sewage that is driven by a motor 31.
  • An inline cutter 32 is also provided to macerate the sewage prior to it passing into the pump 30.
  • the pump 30 may, in particular, be a helical rotor pump, with a rotating rotor in a rubber stator.
  • This is a type of positive displacement pump which, advantageously, provides a relatively constant flow versus the backpressure on the pump. This is beneficial because the pressure within the discharge pipe 5 in a pressure sewer system may vary depending on the number of pumps operating at any one time and the consequent pipe friction.
  • the positive displacement pump may ensure that a relatively consistent amount of sewage, such as the contents of a sewage storage tank 11,12,13,14, is pumped in a given time.
  • the controller 33 may, in particular, include a micro-controller 33a with appropriate dedicated software and hardware.
  • the controller 33 may be connected to a level sensor 34 that is arranged to monitor the level of sewage in the sewage storage tank 35 associated with the pump system. Accordingly, the controller may commence operation of the pump system when the sewage level in the storage tank 35 exceeds a given level. Accordingly, given that the supply of waste from a typical domestic residence is infrequent, it is not necessary to pump waste continuously from the storage tank, reducing the use of the pump, which may increase its useful life and reduce energy consumption.
  • the controller 33 also includes a current sensor 40 that measures the electric current drawn by the motor 31.
  • the controller 33 may, accordingly, monitor the current drawn by the motor 31 in order to prevent damage to the pump system.
  • the controller may be set to stop the operation of the motor if the electric current measured by the current sensor 40 exceeds a given level. This may correspond to the pressure in the discharge pipe 5, which corresponds to the backpressure exerted on the pump 30, exceeding a given level. Preventing operation of the motor in these circumstances may prevent damage to the pump caused by excessive backpressure and/or damage to the motor caused by excessive loading.
  • Excessive current drawn by the electric motor 31 may also be indicative of a blockage in the cutter 32 and/or the pump 30.
  • the controller 33 may also be configured to reverse the direction of the motor if an excessive current is detected by the current sensor 40.
  • the controller may reverse the motor by a predetermined amount such as a quarter turn of the motor. This may be sufficient to unblock the cutter 32 and/or the pump 30 without causing significant pumping in the reverse direction, which would be undesirable.
  • the controller Prior to reversing the motor, the controller may briefly pause the operation of the motor, for example for approximately 1 second. Once the motor has been reversed, the controller 33 may resume normal operation of the pump system. If the excessive current is still detected, the process may be repeated.
  • the controller 33 may be configured to provide a time delay after the operation of the motor has been stopped and/or after the motor has been reversed before normal operation of the pump system is resumed. This may be particularly beneficial if the motor has capacitor-start because repeated starting of the motor in a short period of time may result in damage of the capacitors.
  • the conditions of the discharge pipe 5 may have changed. For example, the number of other pump systems connected to the discharge pipe 5 that are in operation may have changed. In particular, if the number of pumps systems connected to the discharge pipe 5 that are in operation reduces, the pressure within the discharge pipe 5 may decrease such that when the pump system in question resumes normal operation, the current drawn by the electric motor is below the threshold.
  • the alarm may be deactivated.
  • the data stored may be any data that is useful.
  • the data may simply be the total number of times that the controller 33 has suspended the operation of the pump system due to the motor current exceeding one or both of the predetermined thresholds.
  • the stoppage counts may be separate for stoppages caused by the current exceeding the two different thresholds and/or a combined count.
  • the data store 41 may store the date and/or time of each of the stoppages and/or the time separation between the stoppages.
  • the data store 41 may store the frequency with which the operation of the motor is stopped due to the current drawn by the motor exceeding one or both of the thresholds.
  • the data store 41 may store a record of the current drawn by the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08252693A 2007-08-15 2008-08-14 Système de pompe Withdrawn EP2025943A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0715947A GB2451876A (en) 2007-08-15 2007-08-15 Pump system for a pressure sewer system

Publications (1)

Publication Number Publication Date
EP2025943A2 true EP2025943A2 (fr) 2009-02-18

Family

ID=38566455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08252693A Withdrawn EP2025943A2 (fr) 2007-08-15 2008-08-14 Système de pompe

Country Status (5)

Country Link
US (1) US20090081050A1 (fr)
EP (1) EP2025943A2 (fr)
AU (1) AU2008205422A1 (fr)
GB (1) GB2451876A (fr)
NZ (1) NZ570549A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2934876A1 (fr) * 2008-08-05 2010-02-12 Ksb Sas Controle de dysfonctionnement d'un groupe motopompe.
GB2487623A (en) * 2011-05-17 2012-08-01 Clearwater Controls Ltd Pump apparatus and control system
WO2013096726A1 (fr) * 2011-12-22 2013-06-27 Xylem Ip Holdings Llc Commande de pompe comprenant une procédure de nettoyage ou un arrêt en fonction de la charge du moteur
US10711788B2 (en) 2015-12-17 2020-07-14 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
USD890211S1 (en) 2018-01-11 2020-07-14 Wayne/Scott Fetzer Company Pump components
USD893552S1 (en) 2017-06-21 2020-08-18 Wayne/Scott Fetzer Company Pump components
AT522267A1 (de) * 2019-03-12 2020-09-15 Neuburg Wilfried Trockenlaufschutzmodul

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2474691A (en) * 2009-10-23 2011-04-27 Inverter Drive Systems Ltd Pump Control System And Method
DE102011050018A1 (de) * 2011-04-29 2012-10-31 Allweiler Gmbh Pumpen-System
EP3910121A1 (fr) 2012-03-14 2021-11-17 South East Water Corporation Système de surveillance et de contrôle du réseau d'égouts sous pression
AU2014100179B4 (en) * 2012-03-14 2014-07-03 South East Water Corporation Pressure sewer control system and method
NZ630946A (en) 2013-09-10 2015-06-26 South East Water Corp Reservoir control systems and methods
SE540019C2 (sv) 2014-06-03 2018-02-27 Xylem Ip Man Sarl Metod för styrning av ett pumparrangemang vid igensättning av en pump
NZ630446A (en) 2014-09-03 2015-02-27 South East Water Corp Monitoring systems and methods
US11512696B2 (en) * 2016-01-15 2022-11-29 Milwaukee Electric Tool Corporation Transfer pump
JP2019120158A (ja) * 2017-12-28 2019-07-22 株式会社荏原製作所 ポンプ装置
WO2020183484A1 (fr) * 2019-03-14 2020-09-17 Cri Pumps Private Limited Ensemble pompe à roue sécatrice
CN110533890B (zh) * 2019-09-11 2021-06-04 苏州千层茧农业科技有限公司 简易下水道堵塞应急预警发布系统
CN113586413A (zh) * 2021-07-26 2021-11-02 深圳供电局有限公司 水泵控制方法、装置、水泵站及存储介质

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JPS608159A (ja) * 1983-06-28 1985-01-17 Jidosha Kiki Co Ltd 動力舵取装置の制御方法
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JP3642578B2 (ja) * 1993-03-30 2005-04-27 株式会社荏原製作所 ポンプ装置
SE504982C2 (sv) * 1995-11-24 1997-06-09 Flygt Ab Itt Sätt att reglera utpumpningen från en avloppspumpstation
JPH10147236A (ja) * 1996-11-20 1998-06-02 Aisin Seiki Co Ltd 流体圧源装置
JP2000110735A (ja) * 1998-10-01 2000-04-18 Internatl Business Mach Corp <Ibm> ポンプ保護装置、ポンプ保護方法及びポンプ装置
US6481973B1 (en) * 1999-10-27 2002-11-19 Little Giant Pump Company Method of operating variable-speed submersible pump unit
US6378554B1 (en) * 2000-01-14 2002-04-30 Little Giant Pump Company Controlled sewage sump network system
US6638023B2 (en) * 2001-01-05 2003-10-28 Little Giant Pump Company Method and system for adjusting operating parameters of computer controlled pumps
US6534947B2 (en) * 2001-01-12 2003-03-18 Sta-Rite Industries, Inc. Pump controller
US8540493B2 (en) * 2003-12-08 2013-09-24 Sta-Rite Industries, Llc Pump control system and method
EP1889353A2 (fr) * 2005-06-09 2008-02-20 Abhishek Singh Systeme de commutation pour commander la mise en route d'un moteur electrique

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2934876A1 (fr) * 2008-08-05 2010-02-12 Ksb Sas Controle de dysfonctionnement d'un groupe motopompe.
GB2487623A (en) * 2011-05-17 2012-08-01 Clearwater Controls Ltd Pump apparatus and control system
GB2487623B (en) * 2011-05-17 2013-06-19 Id Systems Uk Ltd Control device and pump apparatus
EP2712411B1 (fr) 2011-05-17 2021-08-11 Clearwater Controls Limited Dispositif de commande et appareil de pompe
RU2625413C2 (ru) * 2011-12-22 2017-07-13 КСИЛЕМ АйПи ХОЛДИНГЗ ЭлЭлСи Управление насосом, включающее в себя процедуру очистки или остановки, в зависимости от нагрузки на двигатель
EP2795134B1 (fr) 2011-12-22 2020-12-09 Xylem IP Holdings LLC Contrôle de pompe avec procédure de nettoyage ou arrêt en fonction de la charge du moteur
JP2015506433A (ja) * 2011-12-22 2015-03-02 ザイレム・アイピー・ホールディングズ・エルエルシー モータの負荷に応じて洗浄処理または停止を行うポンプ制御
AU2012358401B2 (en) * 2011-12-22 2017-02-02 Xylem Ip Holdings Llc Pump control including cleaning procedure or stopping depending on motor load
CN104011396A (zh) * 2011-12-22 2014-08-27 赛乐姆知识产权控股有限责任公司 包括根据电机负载的清洁过程或停止的泵控制
US10480518B2 (en) 2011-12-22 2019-11-19 Xylem Ip Holdings Llc Method for controlling a pump arrangement
WO2013096726A1 (fr) * 2011-12-22 2013-06-27 Xylem Ip Holdings Llc Commande de pompe comprenant une procédure de nettoyage ou un arrêt en fonction de la charge du moteur
KR20140106562A (ko) * 2011-12-22 2014-09-03 자일럼 아이피 홀딩스 엘엘씨. 모터 부하에 따라 정화 절차 또는 정지를 포함하는 펌프 제어
US10711788B2 (en) 2015-12-17 2020-07-14 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
US11486401B2 (en) 2015-12-17 2022-11-01 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
USD893552S1 (en) 2017-06-21 2020-08-18 Wayne/Scott Fetzer Company Pump components
USD1015378S1 (en) 2017-06-21 2024-02-20 Wayne/Scott Fetzer Company Pump components
USD890211S1 (en) 2018-01-11 2020-07-14 Wayne/Scott Fetzer Company Pump components
USD1014560S1 (en) 2018-01-11 2024-02-13 Wayne/Scott Fetzer Company Pump components
AT522267A1 (de) * 2019-03-12 2020-09-15 Neuburg Wilfried Trockenlaufschutzmodul

Also Published As

Publication number Publication date
GB2451876A (en) 2009-02-18
NZ570549A (en) 2010-03-26
GB0715947D0 (en) 2007-09-26
US20090081050A1 (en) 2009-03-26
AU2008205422A1 (en) 2009-03-05

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