EP1907806B1 - Reciprocating pump with electronically monitored air valve and piston - Google Patents

Reciprocating pump with electronically monitored air valve and piston Download PDF

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Publication number
EP1907806B1
EP1907806B1 EP06774688A EP06774688A EP1907806B1 EP 1907806 B1 EP1907806 B1 EP 1907806B1 EP 06774688 A EP06774688 A EP 06774688A EP 06774688 A EP06774688 A EP 06774688A EP 1907806 B1 EP1907806 B1 EP 1907806B1
Authority
EP
European Patent Office
Prior art keywords
valve
air
pump
piston
solenoid
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.)
Active
Application number
EP06774688A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1907806A2 (en
EP1907806A4 (en
Inventor
Mark L. Bauck
Mark T. Weinberger
David M. Behrens
Vu K. Nguyen
Christopher M. Lange
Wade D. Palashewski
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.)
Graco Minnesota Inc
Original Assignee
Graco Minnesota Inc
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 Graco Minnesota Inc filed Critical Graco Minnesota Inc
Priority to PL06774688T priority Critical patent/PL1907806T3/pl
Publication of EP1907806A2 publication Critical patent/EP1907806A2/en
Publication of EP1907806A4 publication Critical patent/EP1907806A4/en
Application granted granted Critical
Publication of EP1907806B1 publication Critical patent/EP1907806B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/125—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
    • 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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine

Definitions

  • Air-operated reciprocating piston pumps are well known for the pumping of various fluids. Such pumps typically have mechanically or pneumatically operated air valves to control the flow of air to the two sides of the piston. Control of such pumps has traditionally been by monitoring and controlling the resulting fluid flow rather than the pump itself. Prior art devices such as Graco's EXTREME-MIXTM proportioner have monitored the position of the piston for purposes of control.
  • British Patent Application published as GB 1,187,026 discloses an apparatus for dispensing measured quantities of a liquid, e.g. beer.
  • the apparatus includes a pair of spherical chambers, each having a diaphragm, which can be moved under pressure, so as to define a liquid-containing volume.
  • a pair of air-operated switches is employed, which allow liquid to be pumped out of one of the spherical chambers, and into the other of the spherical chambers.
  • a flow capsule is included in both a beer-supply inlet conduit and a beer supply outlet conduit, both of which conduits communicate with the two spherical chambers.
  • Each flow capsule comprises a plunger, a magnet and a reed switch having a pair of contacts.
  • the plunger has grooves, through which liquid can flow vertically out of the valve when the liquid moves the plunger up out of contact with a shoulder adjacent to the inlet of the capsule.
  • GB 1237701 describes a reciprocating-type pump for metering quantities of a fluid.
  • a pair of pistons are slideably sealed in the bores of respective cylinders, and the two pistons have an identical cross-sectional area.
  • One of the pistons is biased into the chamber by a regulated supply of air pressure, while the other piston is powered to move in and out relative to the chamber, by means of an air cylinder.
  • the air cylinder is controlled by a solenoid and is provided with reed switches, which are operated by a magnetized piston inside the cylinder.
  • the control uses a magnet mounted in the valve cup of the air motor and two reed sensors mounted in the valve cover to monitor the speed and position of the valve.
  • a solenoid is mounted on the valve cover and can be commanded to extend a plunger into the valve cup to stop valve movement and therefore the pump from running away (typically caused by the fluid supply being empty.)
  • the user interface comprises an LCD and buttons to set up and control the pump.
  • the display can be toggled to display cycle rate, flow rate (in various units), total cycles and diagnostic errors. Setup parameters can include fluid units (quarts, liters, etc.) and the runaway set point.
  • the reed switches and magnets are located so as to detect when the air valve is at the extreme position of each stroke or in transition or both.
  • the controller calculates the rate at which the motor is running by counting the opening and closing of the reed switches activated by the varying positions of the air valve.
  • the controller compares that rate to a pre-programmed value to determine if the air motor is in a runaway condition. The that condition is present, the controller activates the solenoid preventing changeover which stops the motor. This acts to prevent spilled fluid and/or pump damage.
  • a magnetoresistive sensor is located in the center of the air motor to precisely monitor the piston position.
  • the data from this sensor in conjunction with that from the air valve sensors provides the input necessary for precise control and diagnostics of the pump and makes it suitable for metering and plural component application.
  • the controller 12 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16.
  • a solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump 10 from running away (typically caused by the fluid supply being empty or the hose of other supply conduit having a leak/rupture.)
  • the user interface 28 comprises an LCD display 30 and buttons 32 to set up and control the pump 10.
  • the display 30 can be toggled to display cycle rate, flow rate (in various units), total cycles and diagnostic errors. Table 1 shows the diagnostic codes which may be obtained by sensing the air valve.
  • the reed switches 20 and magnets 14 are located so as to detect when the air valve 16 is at the extreme position of each stroke or in transition or both.
  • the controller 12 calculates the rate at which the motor 18 is running by counting the opening and closing of the reed switches 20 activated by the varying positions of the air valve 16.
  • the controller 12 compares that rate to a pre-programmed value to determine if the air motor 18 is in a runaway condition. The that condition is present, the controller 12 activates the solenoid 24 preventing changeover which stops the motor 18. This acts to prevent spilled fluid and/or pump damage.
  • a magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position.
  • the data from this sensor 34 in conjunction with that from the air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.
  • Picture Diagnostic code Diagnostic name Description Alarm or warning Technical Description Causes 1 Kunaway
  • the air motor is in runaway.
  • the cycle rate is too high compared to the desired maximum cycle rate.
  • Alarm The current pump speed exceeded the maximum cycle rate for 5 consecutive cycles. Pump is running too quickly. Can occur if piston seal or foot valve error occurs 5 Solenoid failure
  • the air motor has detected a runaway condition, the internal solenoid extended but failed to engage the valve cup.
  • Warning The up stroke pump speed is twice as fast as the down stroke for 5 consecutive cycles. 3 Foot. Valve The foot valve seal is worn. Warning The down stroke pump speed is twice as fast as the up stroke for 5 consecutive cycles. 7 Reed sensor error One of the Reed sensors has failed. Warning Occurs when one of the sensors is switched 5 times without the other sensor being switched Reed sensor docs not operate Reed sensor wire is broken or disconnected 4 Low battery The battery needs to be replaced. Warning Occurs when the battery level is too low Battery voltage is too low

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Compressor (AREA)
EP06774688A 2005-07-28 2006-07-25 Reciprocating pump with electronically monitored air valve and piston Active EP1907806B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06774688T PL1907806T3 (pl) 2005-07-28 2006-07-25 Pompa tłokowa z monitorowanym elektronicznie zaworem powietrznym i tłokiem

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US70330605P 2005-07-28 2005-07-28
US70429005P 2005-08-01 2005-08-01
PCT/US2006/028826 WO2007016081A2 (en) 2005-07-28 2006-07-25 Reciprocating pump with electronically monitored air valve and piston

Publications (3)

Publication Number Publication Date
EP1907806A2 EP1907806A2 (en) 2008-04-09
EP1907806A4 EP1907806A4 (en) 2009-09-16
EP1907806B1 true EP1907806B1 (en) 2012-10-24

Family

ID=37709113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06774688A Active EP1907806B1 (en) 2005-07-28 2006-07-25 Reciprocating pump with electronically monitored air valve and piston

Country Status (13)

Country Link
US (1) US20080199323A1 (pl)
EP (1) EP1907806B1 (pl)
JP (1) JP5237804B2 (pl)
KR (1) KR101197406B1 (pl)
CN (1) CN101233321B (pl)
AU (1) AU2006275975B2 (pl)
BR (1) BRPI0613878A2 (pl)
ES (1) ES2395776T3 (pl)
PL (1) PL1907806T3 (pl)
RU (1) RU2413096C2 (pl)
TW (1) TWI475157B (pl)
UA (1) UA89254C2 (pl)
WO (1) WO2007016081A2 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3599377A1 (de) 2018-07-24 2020-01-29 Robatech AG Verfahren zum bestimmen eines mittels einer kolbenpumpe geförderten volumens sowie doppeltwirkende, pneumatisch antreibbare kolbenpumpe zur durchführung des verfahrens

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US9677549B2 (en) * 2005-07-28 2017-06-13 Graco Minnesota Inc. Reciprocating pump with electronically monitored air valve and piston
UA93051C2 (uk) * 2005-07-29 2011-01-10 Грако Міннесота Інк. Спосіб керування поршневим пневматичним насосом (варіанти)
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US9304028B2 (en) 2012-09-20 2016-04-05 Nordson Corporation Adhesive dispensing device having optimized reservoir and capacitive level sensor
US9169088B2 (en) 2012-09-20 2015-10-27 Nordson Corporation Adhesive dispensing device having optimized cyclonic separator unit
US9200741B2 (en) 2012-10-25 2015-12-01 Nordson Corporation Adhesive dispensing system and method using smart melt heater control
US9120115B2 (en) 2012-10-25 2015-09-01 Nordson Corporation Dispensing systems and methods for monitoring actuation signals for diagnostics
US9243626B2 (en) * 2012-11-19 2016-01-26 Nordson Corporation Adhesive dispensing system and method including a pump with integrated diagnostics
US9574714B2 (en) 2013-07-29 2017-02-21 Nordson Corporation Adhesive melter and method having predictive maintenance for exhaust air filter
CN112969171B (zh) * 2021-02-26 2023-02-28 徐逸轩 浮空通讯装置，其组网通讯和数据传输方法
CN113790188B (zh) * 2021-09-26 2024-03-12 智涂机器人(深圳)有限公司 一种空气阀以及气动活塞泵

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3599377A1 (de) 2018-07-24 2020-01-29 Robatech AG Verfahren zum bestimmen eines mittels einer kolbenpumpe geförderten volumens sowie doppeltwirkende, pneumatisch antreibbare kolbenpumpe zur durchführung des verfahrens

Also Published As

Publication number Publication date
WO2007016081A2 (en) 2007-02-08
TW200726911A (en) 2007-07-16
RU2413096C2 (ru) 2011-02-27
RU2008107573A (ru) 2009-09-10
CN101233321A (zh) 2008-07-30
BRPI0613878A2 (pt) 2011-02-15
EP1907806A2 (en) 2008-04-09
UA89254C2 (uk) 2010-01-11
WO2007016081A9 (en) 2007-04-12
AU2006275975B2 (en) 2011-08-25
WO2007016081A3 (en) 2007-05-24
AU2006275975A1 (en) 2007-02-08
EP1907806A4 (en) 2009-09-16
PL1907806T3 (pl) 2013-02-28
TWI475157B (zh) 2015-03-01
US20080199323A1 (en) 2008-08-21
KR20080038136A (ko) 2008-05-02
JP2009503338A (ja) 2009-01-29
JP5237804B2 (ja) 2013-07-17
CN101233321B (zh) 2010-06-16
ES2395776T3 (es) 2013-02-15
KR101197406B1 (ko) 2012-11-05

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