WO2013177437A1 - Positionneur de soupape électrohydraulique - Google Patents

Positionneur de soupape électrohydraulique Download PDF

Info

Publication number
WO2013177437A1
WO2013177437A1 PCT/US2013/042488 US2013042488W WO2013177437A1 WO 2013177437 A1 WO2013177437 A1 WO 2013177437A1 US 2013042488 W US2013042488 W US 2013042488W WO 2013177437 A1 WO2013177437 A1 WO 2013177437A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
conduit
valve
signal
fluid flow
Prior art date
Application number
PCT/US2013/042488
Other languages
English (en)
Inventor
Dustin HAYT
Joseph Ky LONGLEY
Kevin GENTRY
Original Assignee
Kimray, 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 Kimray, Inc. filed Critical Kimray, Inc.
Publication of WO2013177437A1 publication Critical patent/WO2013177437A1/fr

Links

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
    • F04B49/22—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 by means of valves
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/108—Valves characterised by the material
    • F04B53/1082—Valves characterised by the material magnetic
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source

Definitions

  • the current invention relates to motor valves and actuators associated with such motor valves. More particularly, the current invention relates to positioning such actuators so that the valve is open, closed or partially opened.
  • Motor valves are designed for use in liquid and gas control applications such as oil and water dump valves and such as burner valves. Generally, they have a valve for controlling the flow of the liquid or gas and an actuator, which controls the opening and closing of the valve based on the external input. Often the actuator has been pneumatically controlled; this involves the use of a compressed gas to position the actuator. Use of compressed gas is problematic in that a compressed gas source must be available. In field application this requires either maintaining such a compressed gas source or using locally available sources, such as gas extracted from a well. Among other difficulties, maintaining a compressed gas source is labor intensive and requires constant monitoring.
  • Using locally available sources typically means using hydrocarbon gas; hence, there is a loss of valuable hydrocarbon gas to the atmosphere and concerns over hydrocarbon gas emissions. Additionally, the sour, wet or dirty nature of the supply gas can adversely affect the operation of the motor valve assembly and can add additional maintenance costs because of the necessity of using accessory equipment such as regulators, filters and drip pots.
  • an electro- hydraulic valve positioner comprising a first conduit, a second conduit, a pump, a check valve and an electromechanical valve.
  • the pump has an inlet for receiving a hydraulic liquid from the first conduit and an outlet for discharging the hydraulic liquid to the second conduit.
  • the check valve is in fluid flow communication with the outlet of the pump and the second conduit. The check valve prevents backflow from the second conduit to the first conduit.
  • the electromechanical valve is in fluid flow communication with the first conduit and the second conduit.
  • the electromechanical valve has a first position allowing fluid flow between the first conduit and the second conduit, and a second position preventing fluid flow between the first conduit and the second conduit.
  • FIG. 1 is a perspective view of a motor valve assembly incorporating one embodiment of the current invention.
  • FIGS. 2A and 2B are cross-sectional views with a schematic flow diagram of the electro-hydraulic valve positioner in accordance with the embodiment of FIG. 1.
  • FIG. 2A illustrates the flow to the second side of the diaphragm.
  • FIG. 2B illustrates the flow from the second side of the diaphragm.
  • FIG. 3 is an end view of the mechanical chamber of an electro-hydraulic valve positioner in accordance with the invention.
  • FIG. 4 is an end view of the electronics chamber of an electro -hydraulic valve positioner in accordance with the current invention.
  • FIG. 5 is a cross-sectional view of an electro-hydraulic valve positioner taken along line 5-5 of FIG. 3.
  • FIG. 6 is an enlargement of the check valve used in an electro -hydraulic valve positioner of FIG. 5.
  • FIG. 7 is a partial cross-sectional view and partial schematic view illustrating an embodiment of the invention using a positional sensor.
  • the current invention is directed to an electro-hydraulic valve positioner and a process for using the same.
  • the inventive electro-hydraulic valve positioner can be used as part of a motor valve assembly, which includes a motor valve and the electro-hydraulic valve positioner; hence, the invention also is directed to an inventive motor valve assembly and a process for using the same.
  • the electro-hydraulic valve positioner is sometimes referred to as an actuator.
  • actuators are a mechanism for controlling or moving another mechanism.
  • the inventive electro -hydraulic valve positioner is described in relation to controlling a motor valve and, thus, electro-hydraulic valve positioner is an actuator in that it moves or controls the top works of a motor valve. However, the top works move or control the valve portion of the motor works and, thus, are also an actuator.
  • the term "actuator" will only be used herein in relation to describing the top works of the motor valve.
  • FIG. 1 shows motor valve assembly 10, which comprises motor valve 20, electro- hydraulic valve positioner 22 and fluid reservoir 24.
  • Motor valve 20 has a top portion 26, commonly referred to as a top works 26 and a control valve 28. Top portion 26 has diaphragm housing 27 and actuator 30, which includes actuator stem 33.
  • FIGS. 2A and 2B a motor valve 20 is shown in cross-section and the electro-hydraulic valve is shown schematically.
  • Motor valve 20 is of the type having a control valve 28 and a top portion 26, which includes an actuator 30 and top portion 26.
  • Actuator 30 is movable with a diaphragm 32 within top portion 26.
  • Motor valves are well known in the art, and the interaction of the actuator and diaphragm are well known.
  • the actuator 30 is connected at a first end to valve plug 70 and at a second end to a diaphragm plate 34.
  • Diaphragm plate 34 is connected around its outer circumference to diaphragm 32.
  • Diaphragm 32 is sandwiched around its outer circumference between upper portion 54 and lower portion 56 of diaphragm housing 27.
  • diaphragm 32 divides the interior portion of diaphragm housing 27 into a first zone 58 on first side 60 of diaphragm 32 and a second zone 62 on second side 64 of diaphragm 32.
  • First zone 58 and second zone 62 are sealed from fluid flow contact across the interior of diaphragm housing 27; thus, when fluid pressure is increased in one of the zones there is a pressure differential between them, the diaphragm will move towards the lower pressure zone.
  • Spring 52 is operationally connected to diaphragm plate 34 to provide for a bias for diaphragm 32.
  • motor valve 20 is in a pressure-to-open configuration. Accordingly, when pressure causes diaphragm 32 to move upwardly, the actuator 30, including actuator stem 33, will move upwardly and will open the control valve 28. In the pressure-to-open configuration, spring 52 provides a downward bias for diaphragm 32.
  • the pressure in second zone 62 must be greater than the pressure in first zone 58 by a predetermined amount.
  • the predetermined amount is greater than the amount overcome the bias provided by spring 52. It is understood that for a pressure-to-close configuration, control valve 28 is normally open and pressure will be applied to the top of the diaphragm 32 to close the control valve 28 by moving diaphragm 32 downwardly and, hence, actuator 30 downwardly. In pressure-to-close configuration, spring 52 provides an upward bias for diaphragm 32. Thus, to move diaphragm 32 downward, the pressure in first zone 58 must be greater than the pressure in second zone 62 by the predetermined amount.
  • Control valve 28 comprises a valve housing 72, which defines a first flow channel
  • First flow channel 74 and second flow channel 76 are in fluid flow contact across valve seat 78; however, when valve plug 70 is sealing engaged with valve seat 78, first flow channel 74 and second flow channel 76 are prevented from fluid flow communication across valve seat 78. Accordingly, when actuator 30 is in its lower most position, valve plug 70 sealing engages valve seat 78 and there is not fluid flow communication between first flow channel 74 and second flow channel 76. As actuator 30 moves upwardly, fluid flow communication is established with maximum fluid flow when actuator 30 is in its uppermost position.
  • electro-hydraulic valve positioner 22 is in fluid flow communication with diaphragm housing by first flow line or first conduit 44 and by second flow line or second conduit 46. Additionally, first conduit 44 is in fluid flow communication with hydraulic liquid reservoir 24. As shown, the motor valve 20 is configured for pressure-to-open operation and first conduit 44 is connected to upper portion 54 at port 66 and second conduit 46 is connected to lower portion 56 at port 68. Generally, these connections will be switched for pressure-to-close configurations.
  • diaphragm housing 27 will generally be filled with hydraulic fluid.
  • Hydraulic liquid reservoir 24 can be any suitable container for storing additional hydraulic fluid as necessary for providing suitable hydraulic pressure to diaphragm 32. As illustrated, hydraulic liquid reservoir 24 has transparent or translucent side wall 25 so that the amount of hydraulic liquid in the reservoir can be visually inspected.
  • the hydraulic liquid can be any suitable liquid such as water or hydraulic oil. One type of suitable hydraulic oil is hydro-treated naphthalene oils.
  • Electro-hydraulic valve positioner 22 has valve positioner housing 42 defining an electrical chamber 41 and a mechanical chamber 43.
  • Electrical chamber 41 contains electronic control unit or circuit board 36.
  • Mechanical chamber 43 contains pump 40, pressure transducer 48, check valve 50 and electromechanical valve 51.
  • Electrical chamber 41 and mechanical chamber 43 are isolated so that (other than connections for circuit board 36 to control the mechanical components), there is no contact between the chambers.
  • pump 40 has an inlet 80 in fluid flow communication with first conduit 44 so that it receives hydraulic liquid from first conduit 44.
  • Pump 40 has an outlet 82 for discharging the hydraulic liquid, which is at a higher pressure upon discharge than upon introduction to pump 40.
  • Outlet 82 is in fluid flow communication with check valve 50 and second conduit 46.
  • Check valve 50 is disposed so as to prevent backflow from said second conduit into outlet 82 and thus, back into first conduit 44.
  • Electromechanical valve 51 is in fluid flow communication with first conduit 44 and second conduit 46. Electromechanical valve 51 has a first position, which prevents fluid flow between first conduit 44 and second conduit 46, and a second position, which allows fluid flow between first conduit 44 and second conduit 46.
  • a sensor is utilized to control the positioning of actuator 30, such as pressure transducer 48, which senses the pressure downstream from pump 40. As illustrated in FIG 2A and 2B, pressure transducer 48 senses the pressure on second zone 62.
  • a positional sensor 84 can be mounted as illustrated in FIG. 7 to determine the position of actuator stem 33, as further described below.
  • Pump 40 can be any suitable pump that can be electronically controlled, as such pumps are known in the art.
  • Electromechanical valve 51 can be any suitable valve, such as a solenoid valve.
  • Pressure transducer 48 can be any suitable such pressure transducer or sensors as are known in the art.
  • motor valve assembly 10 may be used, for example, in connection with a fluid-containing vessel to drain fluid therefrom.
  • a liquid level controller such as, for example, an electronic liquid level controller may be connected to the fluid-containing vessel.
  • a signal will be sent to an electronic control unit or printed circuit board 36.
  • FIGS. 2A and 2B which include a schematic flow diagram portion for electro-hydraulic valve positioner 22.
  • Valve positioner housing 42 is ported so that flow lines 44 and 46 are connected to ports in the valve positioner housing 42. The ports are communicated with the inlet and outlet of pump 40.
  • Pump 40 is activated and will operate to circulate fluid from liquid reservoir 24 through line 44 and out through line 46 into the space below diaphragm 32, that is second zone 62.
  • the diaphragm housing 27 of top works 26 will generally be full of hydraulic fluid, but until pump 40 is activated no pressure will be acting upward on diaphragm 32.
  • diaphragm 32 will lift actuator 30 to open control valve 28.
  • a pressure transducer 48 will sense the pressure and will shut pump 40 off when a previously determined pressure set point is reached.
  • a check valve 50 prevents backflow and holds the diaphragm 32 in place thus holding the valve 28 open.
  • FIGS. 2 and 3 are flow diagrams showing the direction of flow to open and close valve 28.
  • Position feedback may be accomplished as follows.
  • Positional sensor 84 can be a rotary sensor, resistive potentiometer, hall-effect sensor or any other sensor capable of detecting the position of actuator stem 33. As shown in FIG. 7, positional sensor 84 is a rotational sensor that interacts with actuator stem 33 through means of grooves 86 and 88.
  • the electronic control unit 36 sends a signal to operate pump 40 to circulate fluid from liquid reservoir 24 through line 44 and out through line 46 into the space below diaphragm 32 to open the motor valve 20 to the desired position. Desired position feedback is accomplished through a signal from the sensor to the printed circuit board 36. Once the desired position is reached, electronic control unit 36 sends a signal to stop pump 40. Subsequently, if motor valve 20 needs to be further opened, a signal can be sent to start pump 40 again.
  • electronic control unit 36 sends a signal to operate electromechanical valve 51 to circulate fluid from the space below diaphragm 32 through line 46 and out through line 44 into liquid reservoir 24 to close the motor valve 20 at the desired position. Desired position feedback is accomplished through a signal from the sensor to the printed circuit board 36.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Servomotors (AREA)

Abstract

La présente invention concerne des soupapes de moteur et des actionneurs associés à de telles soupapes de moteur. Plus particulièrement, la présente invention concerne un positionneur électrohydraulique pour de tels actionneurs de telle sorte que la soupape peut être ouverte, fermée ou partiellement ouverte. L'invention concerne également un procédé de positionnement d'un actionneur pour une soupape de moteur. Le procédé utilise un liquide hydraulique.
PCT/US2013/042488 2012-05-25 2013-05-23 Positionneur de soupape électrohydraulique WO2013177437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261651965P 2012-05-25 2012-05-25
US61/651,965 2012-05-25

Publications (1)

Publication Number Publication Date
WO2013177437A1 true WO2013177437A1 (fr) 2013-11-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/042488 WO2013177437A1 (fr) 2012-05-25 2013-05-23 Positionneur de soupape électrohydraulique

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US (1) US20130315750A1 (fr)
WO (1) WO2013177437A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN105067202A (zh) * 2015-07-24 2015-11-18 成都秦川科技发展有限公司 机电阀气密性智能检测设备及其检测方法

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Publication number Priority date Publication date Assignee Title
CN103615384B (zh) * 2013-12-17 2016-01-27 青岛禹人水设备新技术有限公司 一种耐泥沙式多功能水泵控制阀
AU2014101589A4 (en) * 2014-08-04 2016-09-29 Fenceu Pty Limited Bucket for use with a loader
US20180119691A1 (en) * 2016-10-28 2018-05-03 Graco Minnesota Inc. Flow regulating pump, system and method
KR102196957B1 (ko) * 2020-10-20 2020-12-30 신상열 유압포지셔너가 구비된 밸브제어시스템

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4627235A (en) * 1983-03-16 1986-12-09 Kraftwerk Union Aktiengesellschaft Compact electrohydraulic drive for valves of turbomachines, especially turbines
US6237617B1 (en) * 1999-03-16 2001-05-29 Sturman Bg, Llc Isolated proportional valve
US20070068225A1 (en) * 2005-09-29 2007-03-29 Brown Gregory C Leak detector for process valve
US20120031494A1 (en) * 2010-08-04 2012-02-09 David Lymberopoulos Safety valve control system and method of use

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US2267215A (en) * 1937-01-21 1941-12-23 William A Ray Control system
US3572032A (en) * 1968-07-18 1971-03-23 William M Terry Immersible electrohydraulic failsafe valve operator
US4274438A (en) * 1979-02-21 1981-06-23 Westinghouse Electric Corp. Method of diagnostic valve testing
DE3637404A1 (de) * 1986-11-03 1987-11-26 Bornemann & Haller Kg Stellantrieb
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Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4627235A (en) * 1983-03-16 1986-12-09 Kraftwerk Union Aktiengesellschaft Compact electrohydraulic drive for valves of turbomachines, especially turbines
US6237617B1 (en) * 1999-03-16 2001-05-29 Sturman Bg, Llc Isolated proportional valve
US20070068225A1 (en) * 2005-09-29 2007-03-29 Brown Gregory C Leak detector for process valve
US20120031494A1 (en) * 2010-08-04 2012-02-09 David Lymberopoulos Safety valve control system and method of use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105067202A (zh) * 2015-07-24 2015-11-18 成都秦川科技发展有限公司 机电阀气密性智能检测设备及其检测方法
CN105067202B (zh) * 2015-07-24 2018-12-04 成都秦川物联网科技股份有限公司 机电阀气密性智能检测设备及其检测方法

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