EP0903497A1 - Groupe électropompe submersible permettant un relevage d'effluent - Google Patents
Groupe électropompe submersible permettant un relevage d'effluent Download PDFInfo
- Publication number
- EP0903497A1 EP0903497A1 EP98402134A EP98402134A EP0903497A1 EP 0903497 A1 EP0903497 A1 EP 0903497A1 EP 98402134 A EP98402134 A EP 98402134A EP 98402134 A EP98402134 A EP 98402134A EP 0903497 A1 EP0903497 A1 EP 0903497A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- level
- pump
- effluent
- detector
- control circuit
- 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
Links
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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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/025—Stopping, starting, unloading or idling control by means of floats
Definitions
- the function of the lifting pumps is to transfer the effluents from a receptacle, in particular from a collecting tank or a sump, to an evacuation pipe on a higher level.
- the transfer fluids can be aggressive, hot or cold, charged and have a variable density.
- the command to start and stop the lifting pumps are carried out by automatic devices depending on the level of the liquid in the receptacle.
- JP 04 183991A describes an electric pump group having three level detectors mounted on the receptacle, two of them triggering each a timer. The pump stops at the end of the time period which expires first. Often there is a lot of effluent in the receptacle.
- This Japanese document plans to use a pump that does not prime and aims to prevent the liquid residue in the pump when the pump is running empty receptacle is too agitated and heated and produces foam which harms the good subsequent operation of the pump.
- US 4 311438A provides for measuring the operating time of the pump motor from its last start-up and control the stop time starting at the end of this operating time in function of the previous operating time by increasing the duration when the operating times decrease. It often happens that the receptacle is also not well emptied.
- the invention overcomes these drawbacks with an electric pump group submersible which allows to obtain an effluent residue in the receptacle also as small as possible, while using static sensors not requiring maintenance.
- the subject of the invention is therefore a submersible electric pump group. intended for lifting effluent contained in a receptacle, comprising a pump driven by an electric motor controlled by a circuit ordered.
- a first effluent level detector in the receptacle is preferably mounted on the pump first level and sends a first change signal to the control circuit as soon as the effluent reaches the first level.
- a second detector level of the effluent in the receptacle is preferably mounted on the pump at a second level lower than the first and sends to the control circuit a second state change signal as soon as the effluent has reached a level lower than the second level.
- the control circuit includes means to determine the period of time between the dispatch of the first signal and the second signal and intended to calculate, from this lapse of time, the time remaining from the sending of the second signal for stop the engine.
- a pump priming sensor is provided intended to send to the control circuit, as soon as the defusing of the pump starts, priority override signal.
- the submersible pump unit for lifting effluent contained in the tank C comprises a pump 1 driven by a motor 2 electric controlled by a control circuit 3.
- the pump has a suction opening 4 facing downwards and discharge pipe 5 opening out of tank C.
- a level sensor 6 is mounted at a higher NH level on the casing of the electric pump.
- a second level sensor 8 is mounted at an intermediate NM level on the casing 7. The two sensors are connected by conductors to control circuit 3, which takes the form of a printed circuit board.
- the control circuit shown in Figure 2 includes a conductor 9 connecting the sensor 6 to an AND gate 10 as well as a conductor 28 connecting the sensor 8 to the AND gate 10.
- the AND gate 10 is connected by a conductor 11 to a time counter 12, which measures the time which flows between the passage of the effluent from the NH level to the NM level and which calculates, from this duration, the duration that remains to elapse so that the level of effluent in tank C reaches a level NB (figure 1) higher than the level at which the pump is primed.
- the counter 12 is connected by a conductor 13 to an OR gate 14. It is connected by a conductor 15 to a clock 16, which is connected by a conductor 17 at OR gate 14.
- the output of OR gate 14 is connected by a conductor 18 to an AND gate 19.
- a defuse sensor 20, which can preferably be a motor intensity or cosine capteur sensor of the motor 2 is connected by a conductor 21 to the AND gate 19.
- the door output AND 19 is connected by a conductor 22 to a power relay 23 which supplies the motor 2 by a conductor 24.
- the sensor 8 is connected by a conductor 25 to a NAND gate 26 the output of which is connected by a conductor 27 to the clock 16.
- the submersible electric pump group according to the invention operates from the following way.
- the sensor 6 sends by driver 9, door 10, driver 11, counter 12, conductor 13, door 14, conductor 18, door 19 and conductor 22, a change of state signal to the power relay 23, which sets in motion, by driver 24, motor 2.
- Pump 1 operates and discharges the effluent through the discharge pipe 5.
- the level in the tank C decreases.
- the sensor 8 detects it. He sends, by the door 10 and by the conductor 11, a state change signal at the counter 12, which calculates the time that has elapsed since the start of the the pump 2.
- the counter 12 calculates the time which remains to elapse so that, under the conditions in which the lifting is carried out, the level in the tank C reaches NB level and transmits this information by the driver 15 to the clock 16.
- the sensor 8 sends at the same time, via the conductor 25, information at the NAND gate 26 and, by the driver 27, at the clock 16.
- the clock 16 thus determines the remaining time during which the pump 1 must operate and sends a corresponding signal by the conductor 17, the gate 14, conductor 18, gate 19 and conductors 22 to relay 23 of power. This ceases to supply the motor 2 of the pump 1, as soon as this duration has elapsed.
- the senor 20 If the sensor 20 detects a defusing, it sends, by the conductor 21, door 19 and driver 22, a priority order over all the others, which switches relay 23 off.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
- Flotteurs qui donnent le niveau haut et le niveau bas de l'effluent.
- Détection du niveau par des dispositifs ultrasoniques.
- Détection du niveau par mesure de la résistance au passage d'un courant électrique.
Claims (3)
- Groupe électropompe submersible destiné au relevage d'effluent contenu dans un réceptacle (C), comprenant une pompe (1) entraínée par un moteur (2) électrique commandé par un circuit (3) de commande, comprenantun premier détecteur (6) du niveau de l'effluent dans le réceptacle (C) destiné à envoyer au circuit (3) de commande un premier signal de changement d'état, dès que l'effluent atteint un premier niveau (NH),un deuxième détecteur (8) du niveau de l'effluent dans le réceptacle (C) destiné à envoyer au circuit (3) de commande un deuxième signal de changement d'état, dès que l'effluent a un niveau inférieur à un deuxième niveau (NM) inférieur au premier (NH), caractérisé en ce quele circuit (3) de commande comporte des moyens (12) destinés à déterminer le laps de temps qui s'écoule entre l'envoi du premier signal et du deuxième signal et destinés à calculer, à partir de ce laps de temps, la durée qui reste à courir à partir de l'envoi du deuxième signal pour arrêter le moteur (2).
- Groupe suivant la revendication 1, caractérisé par un capteur (20) de désamorçage de la pompe (1), destiné à envoyer au circuit (3) de commande, dès que le désamorçage de la pompe (1) commence, un signal de désamorçage prioritaire.
- Groupe suivant la revendication 1 ou 2, caractérisé en ce que les deux détecteurs (6 et 8) sont montés sur la pompe (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9711567 | 1997-09-17 | ||
FR9711567A FR2768468A1 (fr) | 1997-09-17 | 1997-09-17 | Groupe electropompe submersible permettant un relevage d'effluent en laissant aussi peu de residu que possible |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0903497A1 true EP0903497A1 (fr) | 1999-03-24 |
EP0903497B1 EP0903497B1 (fr) | 2003-03-26 |
Family
ID=9511169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402134A Expired - Lifetime EP0903497B1 (fr) | 1997-09-17 | 1998-08-28 | Groupe électropompe submersible permettant un relevage d'effluent |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0903497B1 (fr) |
AT (1) | ATE235656T1 (fr) |
DE (1) | DE69812515T2 (fr) |
DK (1) | DK0903497T3 (fr) |
ES (1) | ES2190573T3 (fr) |
FR (1) | FR2768468A1 (fr) |
PT (1) | PT903497E (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2817923A1 (fr) * | 2000-12-12 | 2002-06-14 | Pompes Salmson Sa | Dispositif de pompage pour le relevage de liquide et procede de commande |
CN118727884A (zh) * | 2024-09-04 | 2024-10-01 | 上海中韩杜科泵业制造有限公司 | 一种给水泵站系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4311438A (en) * | 1978-11-20 | 1982-01-19 | El-Fi Innovationer Ab | Method and apparatus for controlling the start of an intermittently operating pump |
JPS5810187A (ja) * | 1981-07-10 | 1983-01-20 | Ebara Corp | 給水ポンプ能力判定装置 |
JPH04183991A (ja) * | 1990-11-15 | 1992-06-30 | Ebara Corp | 汚水・汚物ポンプの運転停止方法 |
JPH07305693A (ja) * | 1994-05-12 | 1995-11-21 | Hitachi Ltd | 水中ポンプの制御装置 |
-
1997
- 1997-09-17 FR FR9711567A patent/FR2768468A1/fr active Pending
-
1998
- 1998-08-28 EP EP98402134A patent/EP0903497B1/fr not_active Expired - Lifetime
- 1998-08-28 PT PT98402134T patent/PT903497E/pt unknown
- 1998-08-28 AT AT98402134T patent/ATE235656T1/de active
- 1998-08-28 DK DK98402134T patent/DK0903497T3/da active
- 1998-08-28 DE DE69812515T patent/DE69812515T2/de not_active Expired - Lifetime
- 1998-08-28 ES ES98402134T patent/ES2190573T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4311438A (en) * | 1978-11-20 | 1982-01-19 | El-Fi Innovationer Ab | Method and apparatus for controlling the start of an intermittently operating pump |
JPS5810187A (ja) * | 1981-07-10 | 1983-01-20 | Ebara Corp | 給水ポンプ能力判定装置 |
JPH04183991A (ja) * | 1990-11-15 | 1992-06-30 | Ebara Corp | 汚水・汚物ポンプの運転停止方法 |
JPH07305693A (ja) * | 1994-05-12 | 1995-11-21 | Hitachi Ltd | 水中ポンプの制御装置 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 085 (M - 206) 8 April 1983 (1983-04-08) * |
PATENT ABSTRACTS OF JAPAN vol. 016, no. 498 (M - 1325) 15 October 1992 (1992-10-15) * |
PATENT ABSTRACTS OF JAPAN vol. 096, no. 003 29 March 1996 (1996-03-29) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2817923A1 (fr) * | 2000-12-12 | 2002-06-14 | Pompes Salmson Sa | Dispositif de pompage pour le relevage de liquide et procede de commande |
CN118727884A (zh) * | 2024-09-04 | 2024-10-01 | 上海中韩杜科泵业制造有限公司 | 一种给水泵站系统 |
Also Published As
Publication number | Publication date |
---|---|
PT903497E (pt) | 2003-07-31 |
DE69812515D1 (de) | 2003-04-30 |
ES2190573T3 (es) | 2003-08-01 |
DE69812515T2 (de) | 2003-11-06 |
EP0903497B1 (fr) | 2003-03-26 |
FR2768468A1 (fr) | 1999-03-19 |
DK0903497T3 (da) | 2003-07-14 |
ATE235656T1 (de) | 2003-04-15 |
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