US20080219857A1 - Protective device for a controlling system of a sewage pump - Google Patents

Protective device for a controlling system of a sewage pump Download PDF

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Publication number
US20080219857A1
US20080219857A1 US11/684,384 US68438407A US2008219857A1 US 20080219857 A1 US20080219857 A1 US 20080219857A1 US 68438407 A US68438407 A US 68438407A US 2008219857 A1 US2008219857 A1 US 2008219857A1
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United States
Prior art keywords
start capacitor
sewage pump
capacitor
protective device
terminal
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.)
Abandoned
Application number
US11/684,384
Inventor
Robert M. Keener
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US11/684,384 priority Critical patent/US20080219857A1/en
Publication of US20080219857A1 publication Critical patent/US20080219857A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/083—Units comprising pumps and their driving means the pump being electrically driven for submerged use and protected by a gas-bell
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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

Definitions

  • the present invention relates to a protective device for a controlling system of a sewage pump, and more particularly to an electronic-type protective device that controls pump operation and has a protective unit protecting a start capacitor in the controlling system to avoid the start capacitor from burnout.
  • a conventional sewage pump system in accordance with the prior art has an operational controlling circuit system 2 for controlling the operation of a sewage pump 1 .
  • the operational controlling circuit system 2 has a start capacitor 21 connected with a run capacitor 22 in parallel connection and with a switch 3 in series connection and further connected with an actuating coil and an operating coil on the sewage pump 1 to perform a combined circuit.
  • the actuating coil 11 and the operating coil 12 drive the sewage pump 1 to function when the electrical power is supplied.
  • the switch 3 mounted on a shaft 4 of the sewage pump 1 has its contact changed from a normal closed (N.C.) status to a normal open (N.O.) status by a centrifugal force of the rotation of the shaft 4 .
  • the start capacitor 21 is disconnected with the power supply to stop discharging so that the start capacitor 21 is protected from burnout and breakdown caused by the discharging or charging operation for a long period.
  • the switch 3 is always kept being switched between the NO and NC status and its contact has carbon-deposition or oxidation incurred by electric sparkles of large current.
  • the contact can not successfully disengage and is kept at the normal closed (N.C.) status that makes the start capacitor 21 to electrically connect the power source.
  • the start capacitor 21 is kept in discharging status, it will burnout sooner or later and then actuating coil 11 and the operating coil 12 will burnout as well.
  • the conventional sewage pump system still has some drawbacks in use.
  • a main objective of the present invention is to provide a protective device for a controlling system of a sewage pump, wherein the protective device protects a start capacitor from keeping discharge and burnout when a switch is abnormally suspended.
  • the protective device for a controlling system of a sewage pump with a start capacitor and a run capacitor, the protective device comprising a protective unit having an analogic or digital electronic circuit with a cutter function to provide a protective efficiency to avoid the start capacitor in the sewage pump from burnout.
  • the start capacitor is protected from burnout and thus has an extended lifespan.
  • FIG. 1 is a cross-sectional view of a sewage pump system with a protective device in accordance with the present invention
  • FIG. 2 is a schematic circuit diagram for the sewage pump system with the protective device in the present invention
  • FIG. 3 is a cross-sectional view of a conventional sewage pump system in accordance with the prior art.
  • FIG. 4 is a schematic circuit diagram for the sewage pump system in accordance with the prior art.
  • a protective device for a controlling system of a sewage pump in accordance with the present invention has a protective unit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by actuating power source or when a transient voltage is occurred by malfunction of a controlling circuit after actuating the sewage pump. Therefore, the start capacitor is certainly protected and significantly improved in lifespan.
  • the characteristic of this invention is that the protective device comprises an analogic or digital electronic circuit with a cutter function.
  • the protective device for a controlling system of a sewage pump is applied to an operation-controlling circuit system 6 to drive a sewage pump 5 as shown in FIG. 1 , wherein the operation-controlling circuit system 6 as shown in FIG. 2 has a start capacitor 61 and a run capacitor 62 .
  • the start capacitor 61 has one end connecting to a first output terminal 3 on a protective unit 7 and another end connecting with a second output terminal 4 on the protective unit 7 to further connect with an actuating coil 51 and an operating coil 52 of a sewage pump 5 to perform a closed circuit.
  • the run capacitor 62 has one end connected to between the start capacitor 61 and the actuating capacitor 51 and another end diverging to connect with a third output terminal 2 on the protective unit 7 and the operating coil 52 that further extends to power source AC to perform a closed circuit. Additionally, a fourth output terminal 1 of the protective unit 1 also connects with the power source AC.
  • the protective unit 7 is made of an analogic or digital electronic circuit with a function as cutter to protect the start capacitor 61 to avoid the start capacitor 61 from burnout when an overload is occurred by actuating power source AC (ON status) or when a transient voltage is occurred by malfunction of a controlling circuit after actuating the sewage pump 5 . Therefore, the start capacitor 61 is certainly protected to keep on operation and significantly improved in lifespan.
  • the protective unit 7 interiorly comprises an analogic or digital electronic circuit with a cutter function and has four terminals including a first terminal 1 served as a signal input end of power source AC, a second terminal 2 (the third output terminal as described above) kept at NC status with the first terminal 1 to control the start capacitor 61 and the run capacitor 62 to function the operating coil 52 , a third terminal 3 (the first output terminal as described above) controlling the start capacitor 61 to function the actuating coil 51 , and a fourth terminal 4 (the second output terminal as described above) kept at NO status with the third terminal 3 to control the start capacitor 61 , the run capacitor 62 to function the actuating coil 51 and the operating coil 52 .
  • the terminal 1 of the protective unit 7 receive the power energy to actuate the circuit system. Meanwhile, the terminal 1 , terminal 2 , terminal 3 and terminal 4 are connected to each other at NC status to make the start capacitor 61 to be electrified to function the actuating coil 51 and to make the run capacitor 62 to be electrified to function the operating coil 52 . After the operation delays some time, the terminals 3 and 4 of the protective unit 7 switch from the NC status to the NO status to make the start capacitor 61 disconnected and stopped so that the start capacitor 61 is protected from burnout or breakdown caused by long-period operation of charge or discharge.
  • the protective device for a controlling system of a sewage pump has the following advantage that:
  • the electronic-type protective unit has the cutter function that makes the terminals 3 and 4 to switch from the NC status to the NO status to isolate the start capacitor from power source and keep the start capacitor from charging and discharging operations. Thereby, the start capacitor is protected from burnout and breakdown during long-period operation.

Abstract

A protective device for a controlling system of a sewage pump has a protective unit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by actuating power source or when a transient voltage is occurred by malfunction of a controlling circuit after actuating the sewage pump. Therefore, the start capacitor is certainly protected and significantly improved in lifespan. The characteristic of this invention is that the protective device comprises an analogic or digital electronic circuit with a cutter efficiency.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a protective device for a controlling system of a sewage pump, and more particularly to an electronic-type protective device that controls pump operation and has a protective unit protecting a start capacitor in the controlling system to avoid the start capacitor from burnout.
  • 2. Description of Related Art
  • As shown in FIGS. 3 and 4, a conventional sewage pump system in accordance with the prior art has an operational controlling circuit system 2 for controlling the operation of a sewage pump 1. The operational controlling circuit system 2 has a start capacitor 21 connected with a run capacitor 22 in parallel connection and with a switch 3 in series connection and further connected with an actuating coil and an operating coil on the sewage pump 1 to perform a combined circuit. In the operational controlling circuit system 2, the actuating coil 11 and the operating coil 12 drive the sewage pump 1 to function when the electrical power is supplied. Meanwhile, the switch 3 mounted on a shaft 4 of the sewage pump 1 has its contact changed from a normal closed (N.C.) status to a normal open (N.O.) status by a centrifugal force of the rotation of the shaft 4. Thereby, the start capacitor 21 is disconnected with the power supply to stop discharging so that the start capacitor 21 is protected from burnout and breakdown caused by the discharging or charging operation for a long period. However, the switch 3 is always kept being switched between the NO and NC status and its contact has carbon-deposition or oxidation incurred by electric sparkles of large current. Thus, the contact can not successfully disengage and is kept at the normal closed (N.C.) status that makes the start capacitor 21 to electrically connect the power source. When the start capacitor 21 is kept in discharging status, it will burnout sooner or later and then actuating coil 11 and the operating coil 12 will burnout as well.
  • According to above description, the conventional sewage pump system still has some drawbacks in use.
    • SUMMARY OF THE INVENTION
  • A main objective of the present invention is to provide a protective device for a controlling system of a sewage pump, wherein the protective device protects a start capacitor from keeping discharge and burnout when a switch is abnormally suspended.
  • To achieve the foregoing objective, the protective device for a controlling system of a sewage pump with a start capacitor and a run capacitor, the protective device comprising a protective unit having an analogic or digital electronic circuit with a cutter function to provide a protective efficiency to avoid the start capacitor in the sewage pump from burnout.
  • By having the protective unit, the start capacitor is protected from burnout and thus has an extended lifespan.
  • Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a cross-sectional view of a sewage pump system with a protective device in accordance with the present invention;
  • FIG. 2 is a schematic circuit diagram for the sewage pump system with the protective device in the present invention;
  • FIG. 3 is a cross-sectional view of a conventional sewage pump system in accordance with the prior art; and
  • FIG. 4 is a schematic circuit diagram for the sewage pump system in accordance with the prior art.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • A protective device for a controlling system of a sewage pump in accordance with the present invention has a protective unit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by actuating power source or when a transient voltage is occurred by malfunction of a controlling circuit after actuating the sewage pump. Therefore, the start capacitor is certainly protected and significantly improved in lifespan. The characteristic of this invention is that the protective device comprises an analogic or digital electronic circuit with a cutter function.
  • The protective device for a controlling system of a sewage pump is applied to an operation-controlling circuit system 6 to drive a sewage pump 5 as shown in FIG. 1, wherein the operation-controlling circuit system 6 as shown in FIG. 2 has a start capacitor 61 and a run capacitor 62. The start capacitor 61 has one end connecting to a first output terminal 3 on a protective unit 7 and another end connecting with a second output terminal 4 on the protective unit 7 to further connect with an actuating coil 51 and an operating coil 52 of a sewage pump 5 to perform a closed circuit. The run capacitor 62 has one end connected to between the start capacitor 61 and the actuating capacitor 51 and another end diverging to connect with a third output terminal 2 on the protective unit 7 and the operating coil 52 that further extends to power source AC to perform a closed circuit. Additionally, a fourth output terminal 1 of the protective unit 1 also connects with the power source AC. The protective unit 7 is made of an analogic or digital electronic circuit with a function as cutter to protect the start capacitor 61 to avoid the start capacitor 61 from burnout when an overload is occurred by actuating power source AC (ON status) or when a transient voltage is occurred by malfunction of a controlling circuit after actuating the sewage pump 5. Therefore, the start capacitor 61 is certainly protected to keep on operation and significantly improved in lifespan. The protective unit 7 interiorly comprises an analogic or digital electronic circuit with a cutter function and has four terminals including a first terminal 1 served as a signal input end of power source AC, a second terminal 2 (the third output terminal as described above) kept at NC status with the first terminal 1 to control the start capacitor 61 and the run capacitor 62 to function the operating coil 52, a third terminal 3 (the first output terminal as described above) controlling the start capacitor 61 to function the actuating coil 51, and a fourth terminal 4 (the second output terminal as described above) kept at NO status with the third terminal 3 to control the start capacitor 61, the run capacitor 62 to function the actuating coil 51 and the operating coil 52. When the power source AC is supplied, the terminal 1 of the protective unit 7 receive the power energy to actuate the circuit system. Meanwhile, the terminal 1, terminal 2, terminal 3 and terminal 4 are connected to each other at NC status to make the start capacitor 61 to be electrified to function the actuating coil 51 and to make the run capacitor 62 to be electrified to function the operating coil 52. After the operation delays some time, the terminals 3 and 4 of the protective unit 7 switch from the NC status to the NO status to make the start capacitor 61 disconnected and stopped so that the start capacitor 61 is protected from burnout or breakdown caused by long-period operation of charge or discharge.
  • According to above description, the protective device for a controlling system of a sewage pump has the following advantage that:
  • The electronic-type protective unit has the cutter function that makes the terminals 3 and 4 to switch from the NC status to the NO status to isolate the start capacitor from power source and keep the start capacitor from charging and discharging operations. Thereby, the start capacitor is protected from burnout and breakdown during long-period operation.
  • Although this invention has been described in its preferred form with a certain degree of particularity, it is understood that the present invention of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts any be resorted to without departing from the spirit and scope of the invention.

Claims (2)

1. A protective device for a controlling system of a sewage pump with a start capacitor and a run capacitor, the protective device comprising a protective unit having an analogic or digital electronic circuit with a cutter function providing a protective efficiency to avoid the start capacitor in the sewage pump from burnout.
2. The protective device as claimed in claim 1, wherein the protective unit further comprises:
a first terminal served as a signal input end of a power source;
a second terminal kept at NC status with the first terminal to control the start capacitor and the run capacitor;
a third terminal controlling the start capacitor; and
a fourth terminal kept at NO status with the third terminal to control the start capacitor and the run capacitor.
US11/684,384 2007-03-09 2007-03-09 Protective device for a controlling system of a sewage pump Abandoned US20080219857A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/684,384 US20080219857A1 (en) 2007-03-09 2007-03-09 Protective device for a controlling system of a sewage pump

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Application Number Priority Date Filing Date Title
US11/684,384 US20080219857A1 (en) 2007-03-09 2007-03-09 Protective device for a controlling system of a sewage pump

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090238687A1 (en) * 2008-03-21 2009-09-24 Jen-Wei Lin Blower
WO2012128713A1 (en) * 2011-03-24 2012-09-27 Xylem Ip Holdings Llc Partition for immersible machine
ITMO20110150A1 (en) * 2011-06-17 2012-12-18 Ducati Energia Spa STARTING UNIT FOR ELECTRIC MOTORS OF COMPRESSORS OR SIMILAR
CN108757499A (en) * 2018-06-25 2018-11-06 赛莱默水处理系统（沈阳）有限公司 The single-phase submerged sewage pump of integrated form

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791736A (en) * 1954-02-25 1957-05-07 Edward J Schaefer Overload protector
US2972708A (en) * 1956-10-05 1961-02-21 Edward J Schaefer Protective means for submersible pump-motors
US3041515A (en) * 1960-12-22 1962-06-26 Texas Instruments Inc Protective circuit
US3634842A (en) * 1970-04-09 1972-01-11 Karl O Niedermeyer Emergency sump pump apparatus
US4066937A (en) * 1976-01-13 1978-01-03 Lennox Industries, Inc. Control circuit for a two speed single phase motor
US4145646A (en) * 1975-04-14 1979-03-20 Werderitch Frank J Start-stop circuit for split phase motor
US4196462A (en) * 1978-05-30 1980-04-01 General Electric Company Protective control circuit for induction motors
US4410924A (en) * 1981-09-10 1983-10-18 The Gorman-Rupp Company Motor protection control circuit
US4626755A (en) * 1984-12-14 1986-12-02 General Electric Company Sump pump motor switch circuit
US4675565A (en) * 1986-06-02 1987-06-23 Lewus Alexander J Capacitor-start parallel resonant motor
US5076762A (en) * 1990-02-07 1991-12-31 A. O. Smith Corporation Vertical sump pump motor
US5103154A (en) * 1990-05-25 1992-04-07 Texas Instruments Incorporated Start winding switch protection circuit
US5667362A (en) * 1993-03-30 1997-09-16 Ebara Corporation Pump system and method for operating the same
US5675231A (en) * 1996-05-15 1997-10-07 General Electric Company Systems and methods for protecting a single phase motor from circulating currents
US6341944B1 (en) * 1999-06-15 2002-01-29 General Electric Company Motor start and float switch assembly
US6474952B1 (en) * 1999-06-30 2002-11-05 General Electric Company Sump pump motor switch assembly
US6499961B1 (en) * 2000-03-16 2002-12-31 Tecumseh Products Company Solid state liquid level sensor and pump controller
US6616416B1 (en) * 2002-02-19 2003-09-09 Bristol Compressors, Inc. Methods and system for motor optimization using capacitance and/or voltage adjustments
US7023167B2 (en) * 2002-05-02 2006-04-04 Smith Otto J M Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit a starting capacitor and a resistive element

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791736A (en) * 1954-02-25 1957-05-07 Edward J Schaefer Overload protector
US2972708A (en) * 1956-10-05 1961-02-21 Edward J Schaefer Protective means for submersible pump-motors
US3041515A (en) * 1960-12-22 1962-06-26 Texas Instruments Inc Protective circuit
US3634842A (en) * 1970-04-09 1972-01-11 Karl O Niedermeyer Emergency sump pump apparatus
US4145646A (en) * 1975-04-14 1979-03-20 Werderitch Frank J Start-stop circuit for split phase motor
US4066937A (en) * 1976-01-13 1978-01-03 Lennox Industries, Inc. Control circuit for a two speed single phase motor
US4196462A (en) * 1978-05-30 1980-04-01 General Electric Company Protective control circuit for induction motors
US4410924A (en) * 1981-09-10 1983-10-18 The Gorman-Rupp Company Motor protection control circuit
US4626755A (en) * 1984-12-14 1986-12-02 General Electric Company Sump pump motor switch circuit
US4675565A (en) * 1986-06-02 1987-06-23 Lewus Alexander J Capacitor-start parallel resonant motor
US5076762A (en) * 1990-02-07 1991-12-31 A. O. Smith Corporation Vertical sump pump motor
US5103154A (en) * 1990-05-25 1992-04-07 Texas Instruments Incorporated Start winding switch protection circuit
US5667362A (en) * 1993-03-30 1997-09-16 Ebara Corporation Pump system and method for operating the same
US5675231A (en) * 1996-05-15 1997-10-07 General Electric Company Systems and methods for protecting a single phase motor from circulating currents
US6341944B1 (en) * 1999-06-15 2002-01-29 General Electric Company Motor start and float switch assembly
US6474952B1 (en) * 1999-06-30 2002-11-05 General Electric Company Sump pump motor switch assembly
US6499961B1 (en) * 2000-03-16 2002-12-31 Tecumseh Products Company Solid state liquid level sensor and pump controller
US6616416B1 (en) * 2002-02-19 2003-09-09 Bristol Compressors, Inc. Methods and system for motor optimization using capacitance and/or voltage adjustments
US7023167B2 (en) * 2002-05-02 2006-04-04 Smith Otto J M Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit a starting capacitor and a resistive element

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090238687A1 (en) * 2008-03-21 2009-09-24 Jen-Wei Lin Blower
WO2012128713A1 (en) * 2011-03-24 2012-09-27 Xylem Ip Holdings Llc Partition for immersible machine
CN103443475A (en) * 2011-03-24 2013-12-11 赛乐姆知识产权控股有限责任公司 Partition for immersible machine
AU2012231838B2 (en) * 2011-03-24 2016-02-04 Xylem Ip Holdings Llc Partition for immersible machine
RU2584381C2 (en) * 2011-03-24 2016-05-20 КСИЛЕМ АйПи ХОЛДИНГЗ ЭлЭлСи Partition for submersible machine
US9391439B2 (en) 2011-03-24 2016-07-12 Xylem Ip Holdings Llc Partition for immersible machine
ITMO20110150A1 (en) * 2011-06-17 2012-12-18 Ducati Energia Spa STARTING UNIT FOR ELECTRIC MOTORS OF COMPRESSORS OR SIMILAR
WO2012172417A1 (en) * 2011-06-17 2012-12-20 Ducati Energia S.P.A. Start-up unit for electric motors of compressors or the like
CN108757499A (en) * 2018-06-25 2018-11-06 赛莱默水处理系统（沈阳）有限公司 The single-phase submerged sewage pump of integrated form

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