WO2009095800A1 - Valve actuator - Google Patents

Valve actuator Download PDF

Info

Publication number
WO2009095800A1
WO2009095800A1 PCT/IB2009/050004 IB2009050004W WO2009095800A1 WO 2009095800 A1 WO2009095800 A1 WO 2009095800A1 IB 2009050004 W IB2009050004 W IB 2009050004W WO 2009095800 A1 WO2009095800 A1 WO 2009095800A1
Authority
WO
WIPO (PCT)
Prior art keywords
slider
sleeve
motion
rotation
center
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.)
Ceased
Application number
PCT/IB2009/050004
Other languages
French (fr)
Inventor
Filippo Dordoni
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.)
DVG AUTOMATION SpA
Original Assignee
DVG AUTOMATION SpA
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 DVG AUTOMATION SpA filed Critical DVG AUTOMATION SpA
Priority to EP09705279A priority Critical patent/EP2242946B1/en
Priority to US12/863,791 priority patent/US20100288956A1/en
Publication of WO2009095800A1 publication Critical patent/WO2009095800A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
    • F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
    • F16K31/1635—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston for rotating valves

Definitions

  • the present invention relates to a valve actuator, i.e. a device for converting a reciprocating rectilinear motion into a reciprocating angular motion and vice versa.
  • Devices are known to be used in the art of valve actuators for converting the rectilinear motion of an actuator into a rotary motion of a valve stem, or vice versa, by a mechanism known as sliding block linkage.
  • a sliding block linkage allows conversion of the uniform rotary motion of a flywheel driven by a motor into a reciprocating rectilinear motion.
  • the object of the present invention is to provide a device for valve actuators that can ensure conversion of reciprocating linear motion into reciprocating rotary motion and vice versa, with features to: reduce friction of moving parts , optimize the distribution of sliding components by using a number of rectilinear guiding rods, in such an arrangement as to neutralize any torque on the device
  • FIG. 1 is a perspective view of a drive device for valve actuators of the present invention
  • Figure 2 shows the motion conversion device proper of the device as shown in Figure 1 ,
  • FIG. 4 is a top view of the device of Figure 2.
  • numeral 1 generally designates a valve actuator, i.e. a device for converting a reciprocating rectilinear motion into a reciprocating angular rotary motion.
  • the device 1 comprises a case 10 for housing the rectilinear/rotary motion converting components .
  • a sleeve 2 may be seen, here having a hollow cylindrical section, which is adapted to be keyed to a corresponding shaft (not shown) such as a valve driving shaft or the like, to cause rotation about its axis Al.
  • a pair of forks 3 extend perpendicular to the axis Al of said sleeve 2 , and are adapted to hold a an element 6 in the gap or groove 3b created between the fork prongs, which element projects vertically, along the axis A3, from a slider 4 and is attached thereto, for instance, by suitable threads.
  • the above part 6 may be of any shape whatever, as long as it may be keyed into the corresponding groove 3b.
  • the above slider 4 is capable of linear sliding motion, due to the action of a stem 11 which is in turn controlled, for example, by a hydraulic or pneumatic cylinder and is free to slide on equally spaced guiding rods 5, relative to the center of application of the stem 11 of the slider 4
  • the guiding rods 5 are integral with two inner, opposite walls of the case 10 and their purpose is to prevent torques or rotation moments from building up on the slider 4 as the latter slides along the rods 5.
  • the center of application of the stem 11 on the slider will preferably correspond to the center of gravity of the latter.
  • the slider 4 will be displaced by a linear motion, perpendicular to the above axes Al and A3 , as shown by the reference A2 , to cause linear motion upon rotation of the sleeve 2 : the guiding rods 5 are obviously perpendicular to the axis of the sleeve 2, for rectilinear/rotary motion conversion. While the embodiment as shown herein has four guiding rods 5, there may be also three or more of such guides , without departure from the scope of the invention, which are all equally spaced from the center of application of the stem 11, i.e. arranged at the vertices of a regular polygon whose center of gravity is the center of application of the stem 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Actuator (AREA)

Abstract

A valve actuator device (1) of the type adapted to convert a reciprocating rectilinear motion into a reciprocating angular motion and vice versa in valve actuators, of the type comprising a sleeve (2) adapted to be keyed to a corresponding rotation driving shaft, a slider (4) sliding along linear guides (5), one or more forks (3) integral with the sleeve (2) for holding an element (6) extending from said slider (4) in the gap (3b) between its prongs, to generate a translational motion upon rotation of the sleeve (2) and vice versa. Three or more equally spaced rods (5) are provided for guiding the slider (4), and are arranged to define the vertices of a regular polygon with the center of application of the stem (11) or the center of gravity of the slider (4), to prevent any torque or rotation moment (4) from building up on the slider (4) as it slides on the rods (5).

Description

TITLE: VALVE ACTUATOR
DESCRIPTION
The present invention relates to a valve actuator, i.e. a device for converting a reciprocating rectilinear motion into a reciprocating angular motion and vice versa.
Devices are known to be used in the art of valve actuators for converting the rectilinear motion of an actuator into a rotary motion of a valve stem, or vice versa, by a mechanism known as sliding block linkage.
Namely, a sliding block linkage allows conversion of the uniform rotary motion of a flywheel driven by a motor into a reciprocating rectilinear motion.
The object of the present invention is to provide a device for valve actuators that can ensure conversion of reciprocating linear motion into reciprocating rotary motion and vice versa, with features to: reduce friction of moving parts , optimize the distribution of sliding components by using a number of rectilinear guiding rods, in such an arrangement as to neutralize any torque on the device These objects and advantages are achieved by a device for converting a reciprocating rectilinear motion into a reciprocating angular motion and vice versa, according to the present invention, which is characterized by the annexed claims .
This and other features will be more apparent from the following description of a few embodiments , which are shown by way of example and without limitation in the accompanying drawings , in which :
- Figure 1 is a perspective view of a drive device for valve actuators of the present invention
Figure 2 shows the motion conversion device proper of the device as shown in Figure 1 ,
- Figure 3 shows the slider and the guiding rods of the linear translation mechanism of the device of
Figure 1 ,
- Figure 4 is a top view of the device of Figure 2.
Referring to Figures 1 , 2 , 3 and 4 , numeral 1 generally designates a valve actuator, i.e. a device for converting a reciprocating rectilinear motion into a reciprocating angular rotary motion.
Namely, the device 1 comprises a case 10 for housing the rectilinear/rotary motion converting components .
Here, a sleeve 2 may be seen, here having a hollow cylindrical section, which is adapted to be keyed to a corresponding shaft (not shown) such as a valve driving shaft or the like, to cause rotation about its axis Al. A pair of forks 3 extend perpendicular to the axis Al of said sleeve 2 , and are adapted to hold a an element 6 in the gap or groove 3b created between the fork prongs, which element projects vertically, along the axis A3, from a slider 4 and is attached thereto, for instance, by suitable threads.
The above part 6 may be of any shape whatever, as long as it may be keyed into the corresponding groove 3b.
The above slider 4 is capable of linear sliding motion, due to the action of a stem 11 which is in turn controlled, for example, by a hydraulic or pneumatic cylinder and is free to slide on equally spaced guiding rods 5, relative to the center of application of the stem 11 of the slider 4
The guiding rods 5 are integral with two inner, opposite walls of the case 10 and their purpose is to prevent torques or rotation moments from building up on the slider 4 as the latter slides along the rods 5.
The center of application of the stem 11 on the slider will preferably correspond to the center of gravity of the latter.
Therefore, the slider 4 will be displaced by a linear motion, perpendicular to the above axes Al and A3 , as shown by the reference A2 , to cause linear motion upon rotation of the sleeve 2 : the guiding rods 5 are obviously perpendicular to the axis of the sleeve 2, for rectilinear/rotary motion conversion. While the embodiment as shown herein has four guiding rods 5, there may be also three or more of such guides , without departure from the scope of the invention, which are all equally spaced from the center of application of the stem 11, i.e. arranged at the vertices of a regular polygon whose center of gravity is the center of application of the stem 11.

Claims

1. A valve actuator (1) of the type adapted to convert a reciprocating rectilinear motion into a reciprocating angular motion and vice versa in valve actuators, of the type comprising a sleeve
(2) adapted to be keyed to a corresponding rotation driving shaft, a slider (4) sliding along linear guides (5) , one or more forks (3) integral with the sleeve (2) for holding an element (6) extending from said slider (4) in the gap (3b) between its prongs , to generate a translational motion upon rotation of the sleeve (2) and vice versa, characterized in that it comprises three or more equally spaced rods (5) for guiding the slider (4) , and arranged to define the vertices of a regular polygon with the center of application of the stem (11) or the center of gravity of the slider (4) , to prevent any torque or rotation moment (4) from building up on the slider (4) as it slides on the rods (5) .
2. An actuator (1) as claimed in claim 1, characterized in that the slider (4) will be displaced by a linear motion, perpendicular to the axis (Al) of the sleeve (2) , to cause linear motion upon rotation of the sleeve (2) .
PCT/IB2009/050004 2008-01-28 2009-01-05 Valve actuator Ceased WO2009095800A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09705279A EP2242946B1 (en) 2008-01-28 2009-01-05 Valve actuator
US12/863,791 US20100288956A1 (en) 2008-01-28 2009-01-05 Valve actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000006A ITPR20080006A1 (en) 2008-01-28 2008-01-28 VALVE ACTUATOR
ITPR2008A000006 2008-01-28

Publications (1)

Publication Number Publication Date
WO2009095800A1 true WO2009095800A1 (en) 2009-08-06

Family

ID=40290270

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/050004 Ceased WO2009095800A1 (en) 2008-01-28 2009-01-05 Valve actuator

Country Status (4)

Country Link
US (1) US20100288956A1 (en)
EP (1) EP2242946B1 (en)
IT (1) ITPR20080006A1 (en)
WO (1) WO2009095800A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015181794A1 (en) * 2014-05-30 2015-12-03 Air Torque S.P.A. Lever mechanism for converting a motion from linear to rotary
WO2017199268A1 (en) * 2016-05-19 2017-11-23 IMI STI S.r.l. Device for a valve shutter displacement
IT201700089308A1 (en) * 2017-08-03 2019-02-03 Air Torque S P A Lever kinematics for the transformation of a linear to rotary motion.
DE102020211807A1 (en) 2020-09-22 2022-03-24 Zf Friedrichshafen Ag Switching device for a motor vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3146221B1 (en) * 2014-05-22 2019-05-08 Flowserve S.r.l. Guide element for a valve actuator and actuator provided with said guide element
US10704707B2 (en) * 2016-05-05 2020-07-07 Dresser, Llc Manufacture of actuators and control valve assemblies

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910165A (en) * 1972-11-20 1975-10-07 John M Sheesley Extended guide-tie rods
US3929024A (en) * 1974-10-10 1975-12-30 Res Engineering Co Actuator

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US2987888A (en) * 1959-11-23 1961-06-13 Crowell Designs Inc Hydraulic master drive unit
US3672262A (en) * 1970-05-04 1972-06-27 Michael A Karr Valve operator apparatus
US3704986A (en) * 1970-12-09 1972-12-05 Res Eng Co Actuator
US3797324A (en) * 1972-07-31 1974-03-19 Res Eng Co Actuator
US4134306A (en) * 1976-09-20 1979-01-16 Phd, Inc. Rotary actuator
US4265132A (en) * 1979-04-27 1981-05-05 Robertson James R Linear-rotary translator
US4337691A (en) * 1979-06-08 1982-07-06 Kitazawa Valve Co., Ltd. Valve driving apparatus
US4704912A (en) * 1986-05-13 1987-11-10 Honeywell Inc. Sliding crank actuator
US4660428A (en) * 1986-05-13 1987-04-28 Honeywell Inc. Drive train system
US6640688B1 (en) * 2000-08-25 2003-11-04 Tyco Flow Control, Inc. Actuator assembly
US7303180B1 (en) * 2006-12-18 2007-12-04 Val Matic Valve & Mfg. Corp. Valve actuator with split thrust bearing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910165A (en) * 1972-11-20 1975-10-07 John M Sheesley Extended guide-tie rods
US3929024A (en) * 1974-10-10 1975-12-30 Res Engineering Co Actuator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015181794A1 (en) * 2014-05-30 2015-12-03 Air Torque S.P.A. Lever mechanism for converting a motion from linear to rotary
US10655712B2 (en) 2014-05-30 2020-05-19 Air Torque S.P.A. Lever mechanism for converting a motion from linear to rotary
WO2017199268A1 (en) * 2016-05-19 2017-11-23 IMI STI S.r.l. Device for a valve shutter displacement
IT201700089308A1 (en) * 2017-08-03 2019-02-03 Air Torque S P A Lever kinematics for the transformation of a linear to rotary motion.
WO2019025285A1 (en) * 2017-08-03 2019-02-07 Air Torque S.P.A. Lever mechanism for converting a motion from linear to rotary
DE102020211807A1 (en) 2020-09-22 2022-03-24 Zf Friedrichshafen Ag Switching device for a motor vehicle

Also Published As

Publication number Publication date
ITPR20080006A1 (en) 2009-07-29
EP2242946A1 (en) 2010-10-27
US20100288956A1 (en) 2010-11-18
EP2242946B1 (en) 2013-02-27

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