WO2012168939A1 - Clapet de commande hydraulique à scellage rigide doté d'un passage d'écoulement de forme elliptique - Google Patents

Clapet de commande hydraulique à scellage rigide doté d'un passage d'écoulement de forme elliptique Download PDF

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Publication number
WO2012168939A1
WO2012168939A1 PCT/IL2012/050197 IL2012050197W WO2012168939A1 WO 2012168939 A1 WO2012168939 A1 WO 2012168939A1 IL 2012050197 W IL2012050197 W IL 2012050197W WO 2012168939 A1 WO2012168939 A1 WO 2012168939A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
flow
flow passage
opening
seat
Prior art date
Application number
PCT/IL2012/050197
Other languages
English (en)
Inventor
Hezi HAGBI
Eliyahu Dvash
Original Assignee
Ooval Valves Ltd.
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 Ooval Valves Ltd. filed Critical Ooval Valves Ltd.
Publication of WO2012168939A1 publication Critical patent/WO2012168939A1/fr

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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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats

Definitions

  • the invention is found in the field of hydraulic control valves that serve in industry, agriculture, fire Extinguishing and water conduit systems, and more precisely in the field of valves endowed with rigid sealing (in contradiction to direct sealing diaphragm valves), namely - valves in which the flow control is executed by a movable rigid component which is linearly displaceable towards or away from the valve seat.
  • a globe valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body.
  • globe valves body are shaped with the two halves of the body being separated by an internal baffle. This has an opening that forms a seat onto which a movable plug can be screwed in to close (or shut) the valve.
  • the plug is also called a disc or disk.
  • the plug is connected to a stem which is operated by screw action in manual valves while automated globe valves have a smooth stem rather than threaded and are opened and closed by an actuator assembly.
  • narrowing of the width dimension is required once more, in order to return, more or less, to the given diameter of the flow inlet, which is also the characteristic diameter of the flow passage in the valve towards the flow outlet from it (the sealable flow passage, namely - the flow passage that around it the valve seat is formed, wherein a movable rigid component is linearly displaceable towards or away from the valve seat, executing the operation of closing the flow passage all the way to achieve complete closure, or in the other direction - opening it for the passage of flow through it towards the flow outlet from the valve).
  • This geometry of converting the round configuration of the flow inlet and back to its round configuration - and now as a sealable flow passage, causes the generation of whirlpool flow, energy losses and as an outcome - unwelcome head losses.
  • the invention the subject matter of this patent application is characterized by that that in a hydraulic control valve of the type in which the flow passage from the flow inlet to the flow outlet and away from it, is amenable to rigid sealing (in contradiction to direct sealing, diaphragm valves) wherein the flow passage is implemented as a passage that was formed in an elliptical configuration, and its lengthwise axis (the principal axis) is essentially perpendicular to the flow axis towards the valve and away from it.
  • this characteristic of the invention applies to any flow passage as said, whose shape is not round but rather is formed as an elongated circle, flattened circle, egg shaped configuration, oval (elliptical).
  • the invention includes also flow passages as said, that do not conform strictly to the precise definition of an ellipse (the geometrical location of all the points in a plain, whose sum of distances from two fixed points in the plain (the focuses of the ellipse) is constant) - or given to be described by means of algebra through a theory of analytic geometry (the equations of a canonical ellipse).
  • the flow passage formed as said - as an elongated circle, flattened circle, egg shaped configuration, oval (to tell apart from round), wherein the principal axis that extends along the flow passage, is essentially perpendicular to the flow axis towards the valve and away from it.
  • the secondary axis that extends across the width of the elliptically configured flow passage can be essentially parallel to the flow axis towards the body of the valve and away from it (while implementing the invention in those valves wherein the linearly movement of the rigid component towards or away from the valve seat is performed in a perpendicular direction to the flow axis to the valve and from it), or inclined in an angle relative to the flow axis towards or away from the body of the valve (while implementing the invention in those valves wherein the movement of the rigid component towards or away from the valve seat is in an angle relative to the flow axis to the body of the valve and from it).
  • the presented subject is a hydraulic control valve wherein the flow passage from the flow inlet (to the body component of the valve) to the flow outlet, is amenable to being rigidly sealed, and as said, the flow passage is formed as an opening with an elliptic configuration, wherein its lengthwise axis is essentially perpendicular to the flow axis towards the valve and away from it.
  • the valve includes in addition, a seat ring component that is suited to be installed around the elliptical flow passage opening.
  • the seat ring component in accordance with this embodiment of the invention, is formed with a ring-shaped circumferential valve seat that protrudes from its surface area and with an edge that smoothly connects between the round valve seat and the edge of the elliptical flow passage opening (and hence the connecting edge has variable cross section dimensions and angles).
  • the valve comprises in addition an elastomeric sealing component of a round shape, suitable width and inherent flexibility, that from the instant of sealing the valve, is suited to be linked with the ring-shaped (round) valve seat and as well also with at least a sector of the edge that smoothly connects between the valve seat and the edge of the elliptical flow passage opening to be disconnected from them at the instant of opening the valve.
  • a method that comprises the step of providing the flow passage as an elliptically shaped opening whose lengthwise axis is substantially perpendicular to the flow axis towards the valve and away from it.
  • the method can also include the step of providing a seat ring component that is suited to being installed around the elliptically shaped opening and is formed with a circumferential valve seat that is ring-shape (round) in its configuration and protrudes from its surface area and with a edge of variable dimensions of its cross section and its angles that smoothly connects between the ring-shaped valve seat and the edge of the elliptical flow passage opening.
  • the method might also comprise an additional step of reducing the phenomena of shocks at times of closing or opening the valve, by providing an elastomeric sealing component of a round shape, suitable width and inherent flexibility, that from the instant of sealing the valve, is suited to be linked with the valve seat as well as with at least a sector of the connecting edge of the seat ring, and to be disconnected from it on the opening of the valve.
  • Figure No. 1 constitutes a view in perspective of a cross section of an example body component of a valve in accordance with the invention.
  • Figure No. 2 constitutes a side view of the example body component of the valve that is illustrated in Fig. No.1.
  • Figure No. 3 constitutes a view of the a-a cross section that is marked in Fig. No. 2.
  • Figure No. 4 constitutes a view of the b-b cross section that is marked in Fig. No. 2.
  • Figure No. 5 constitutes an exploded view of some of the components of an example of a valve in accordance with the invention.
  • Figure No. 6 constitutes a view in perspective of the seat ring component that is shown in Fig. No. 5, for a smooth geometrical transition from the elliptical flow passage that is formed in the body component of the valve to a ring-shaped valve seat.
  • Figure No. 7 constitutes a cross section view of an example valve in accordance with the invention, that part of its components are illustrated in Fig. No. 5, wherein the valve is in the open state of operation.
  • Figure No. 8 constitutes a cross section view of an example of the valve in accordance with the invention that is illustrated in Fig. No. 7 wherein the valve is in the closed state of operation (complete sealing).
  • Figure No. 9 constitutes a head loss - flow rate graph of comparative experiments that were undertaken on a valve in accordance with the invention - and on parallel valves in accordance with the prior art, and that point at the relative advantage of the valve that is in accordance with the invention.
  • Figure No. 1 constitutes a view in perspective of a cross section of an example body component 10 of a valve in accordance with the invention.
  • Figure No. 2 constitutes a side view of the example body component 10.
  • Figure No. 3 constitutes a view of the a-a cross section that is marked in Fig. No. 2.
  • Figure No. 4 constitutes a view of the b-b cross section that is marked in Fig. No. 2.
  • Body component 10 is formed with a flow inlet 20 and flow outlet 30, in a configuration of bores having round cross sections that extend on the two sides of body component 10.
  • the flow inlet and outlet (20, 30 respectively) are formed around a common axis 40 that constitutes the flow axis to and from the valve. Between the flow inlet and the flow outlet there is formed a baffle 50 that separates between them and leads the flow from the flow inlet 20 towards flow passage 60.
  • a round shaped seat 70 is formed around the circumference of flow passage 60.
  • flow passage 60 is formed in body component 10 in an elliptical configuration (to distinguish from a round configuration) wherein the lengthwise axis of the flow passage (the principal axis) 80 is substantially perpendicular in its direction relative to axis 40.
  • the flow passage would be formed as an elongated circle, flattened circle, egg shaped configuration, oval (as distinguished from a bona fide round one), wherein the principal (main) axis that extends along the flow passage is substantially perpendicular to the flow axis towards the valve and away from it.
  • the secondary axis 90 that extends across the width of flow passage 60, in the illustrated example - parallel to axis 40.
  • any professional would understand that in the illustrated example, there is apparently treated a body component of a globe valve in which the flow control in the valve is executed by a rigid component (that is not illustrated) that is linearly displaceable towards or away from flow passage 60 and seat 70 along axis 100.
  • flow passage 60 is formed at the body component of valve 10 in an elliptic configuration, wherein in the illustrated example its lengthwise axis, namely the principal axis 80 is substantially perpendicular to the flow axis 40 (the flow axis towards the valve and away from it).
  • any professional would also understand that forming flow passage 60 in an elliptical configuration as said, while its lengthwise axis (the principal axis) 80 is perpendicular in its direction relative to axis 40, cancels the need of narrowing the width dimension in order to return, more or less to the diameter of the flow inlet.
  • - forming the flow passage in an elliptical configuration that is elongated in comparison to the diameter of a round configuration flow passage makes redundant and cancels the need of repeated narrowing of the width dimension.
  • axis 40 is common to the flow inlet and to the flow outlet, but any professional would understand that the discussed matter is presented solely as an example, and it is feasible to implement the invention also when a common axis is not the case.
  • the length axis (the principal axis) 80 of flow passage 60 is perpendicular in its direction relative to axis 40 (whereas the secondary axis 90 is parallel to common axis 40) but again, any professional would understand that we are presenting solely an example and it is feasible to implement the invention also when the axes of the elliptical openings of flow passage 60 are slightly diverted (pushed aside) in relation to the flow axes towards or away from the body component of the valve (for example - say approximately up to fifteen degrees).
  • axis 100 along which the linear movement of the rigid component (that is not illustrated) is executed, is perpendicular in its direction to common axis 40, but also in this case - any professional would understand that it is feasible to implement the invention also in valves in which the linearly movement of the rigid component towards the flow passage opening or from it, is in an angle relative to the flow axis to the body component of the valve or away from it. Hence, in any case, it is feasible to implement the invention also when there exist all kind of combinations of the variations that we have indicated above.
  • FIG. 5 constitutes an exploded view of some of the components of an example of a valve 200 in accordance with the invention.
  • Valve 200 similarly to a body component 10 as was described above when referring to figures No. 1 to No. 4, is also a globe valve type in which the flow control in the valve is executed using a rigid component that is amenable to be linearly displaceable motion towards or away from the valve seat, along an axis that is perpendicular to the flow towards the valve and from it.
  • Valve 200 comprises body component 210 that, in accordance with the invention, the flow passage 260 in it is formed in an elliptical configuration rather than in a round configuration wherein it lengthwise axis (the principal axis) 80 is perpendicular in its direction to the flow axis towards the valve and away from it.
  • a round seat 270 is formed around the circumference of flow passage 260 .
  • an array 275 of thread seats is formed intended to accept screws in them upon assembly.
  • Seat ring 285 is also included in valve 200.
  • Seat ring 285 is formed around its circumference with an array 295 of passing through seats intended to accept screws in them and matching array 275 of round seat 270.
  • Seat ring 285 is formed with opening 305, whose shape is elliptical, in a manner that from the instant of affixing seat ring 285 unto seat 270 that is formed in body component 210 (by the screws that are not illustrated), it connects for flow passage - smooth as much as practicable from flow passage 260.
  • seat ring 285 provides a smooth geometrical passage from the elliptical flow passage 260 that is formed in body component 210 to the valve seat that is - as we shall see inhere after, round in its shape.
  • Figure No. 6 constitutes a view in perspective (at close range) of the same seat ring component 285 that is shown in Fig. No. 5, and that is intended to provide a smooth geometrical transition as much as practicable from the circumference edge of elliptical flow passage 260 that is formed in body component 210 of valve 200, to valve seat 375 that is round in its shape.
  • Seat 375 is formed in a configuration of a round rib that protrudes above surface area
  • seat ring 285 (the surface area that from the instant of attaching surface area 395 of valve seat 375 to seat 270 - faces the rigid component that is linearly displaceable towards or away from valve seat 375.
  • Edge 405 that links valve seat 375 whose shape is round to opening 305 is - naturally, variable in its dimensions and its angles - narrow and steep at the ends of the lengthwise axis (the principal axis) of the elliptical opening, and proceeds and becomes longer while moderating its angle towards the ends of the width axis (the secondary axis of the elliptical opening).
  • Edge 405 is given to smooth and accurate machining by milling, wherein seat ring 285 might be produced from stainless steel and is replaceable when wear occurred.
  • any professional will understand that the circumference edge of elliptical flow passage 260 too can be formed while variable in its dimensions and its angles- narrow and steep at the ends of the lengthwise axis (the principal axis) of the elliptical opening, and proceeds and becomes longer while moderating its angle towards the ends of the width axis (the secondary axis of the elliptical opening), and therefore, providing a smooth transition between opening 260 and edge 405 of seat ring 285.
  • seal 315 of a round configuration is made from elastomeric material and suited to be installed at the end of the rigid component that is amenable to be linearly displaceable towards or away from valve seat 375; sealing head 325 resembles a small cup while seal 315 is affixable on the outer side of its bottom; diaphragm 35 in a ring- like configuration is made of elastomeric material, wherein its outer rim is suited to be affixed to the valve body and its inner circumference rim to sealing head 325, and serves for separating from the flow area of the valve, wherein concurrently its flexibility enables linearly motion of sealing head 325; spring 345 that from the instant of its installation biases sealing head 325 towards the valve seat; stem 355 whose one end is suited to be affixed unto the inner side of the bottom of sealing head 325 and its other end is suited to connect unto an actuator of the linear movement (that is not illustrated); and a
  • valve 200 is solely an example, and any professional would understand that the invention can be implemented also in other and different types of valves (for example - in valves in which the motion of the rigid component towards the opening of the flow passage or away from it, is performed in an angle relative to the flow axis towards the body of the valve and away from it) and in valves having different components (for example - that have threaded actuators).
  • Figure No. 7 constitutes a cross section view of an example valve 200 in accordance with the invention, in its open state of operation.
  • Note arrow 415 relating to the direction of the linearly motion of sealing head 325 wherein at its bottom sealing 315 is affixed.
  • Stem 355 that is affixed to the sealing head is pulled by an actuator (that is not illustrated) against spring 345.
  • Figure No. 8 constitutes a cross section view of valve 200 wherein the valve is in closed operating state (complete sealing).
  • Note arrow 425 relating to the direction of the movement while resorting to help from spring 345 that constantly biases the sealing head towards valve seat 375.
  • seal 315 that has an adequate thickness and an inherent flexibility properties, then the sealing by it is executed not only on the ring- shaped (round) circumference of valve seat 375, but rather seal 315 continues to be gradually pressed and in a non equal manner on at least a sector of the varying surface areas of edge 405.
  • the seal with properties of varying flexibility (for example - relatively rigid in one circumferential sector that connects to the circumference round edge of the valve seat and relatively soft in a different circumferential sector that connects at least with a sector of the varying surface areas of edge).
  • Figure No. 9 constitutes a 'head losses - flow rate' graph of comparative experiments that were conducted on a valve in accordance with the invention (tagged INV) - and on three equivalent valves made by various manufacturers in accordance with the prior art (tagged REFl, REF2 and REF3).
  • the three equivalent valves are six (6) inch globe valves (and this is also the diameters of the sealable flow passages in them, round in their shapes).
  • the valve in accordance with the invention is also a six inch globe valve, but its flow passage was formed in an elliptical configuration, wherein its principal (main axis) is essentially perpendicular to the flow axis towards the valve and away from it and its length is 150 mm, while the length of its width axis (the secondary axis) is 140 mm.
  • a method that that comprises the step of providing the flow passage as an elliptically shaped opening whose lengthwise axis is essentially perpendicular to the flow axis towards the valve and away from it namely - flow passage 260 in the implementation of the method here, and for reasons of convenience we shall continue to tag the components that are apt to be implemented in the method in accordance with the example).
  • the method can also include the step of providing a seat ring component (285) that is suited to being installed around the elliptically shaped opening and is formed with a circumferential valve seat (375) that is ring-shape (round) in its configuration and protrudes from its surface area and with a edge (405) of variable dimensions of its cross section and its angles that smoothly connects between the ring-shaped valve seat and the edge of the elliptical flow passage opening.
  • a seat ring component 285) that is suited to being installed around the elliptically shaped opening and is formed with a circumferential valve seat (375) that is ring-shape (round) in its configuration and protrudes from its surface area and with a edge (405) of variable dimensions of its cross section and its angles that smoothly connects between the ring-shaped valve seat and the edge of the elliptical flow passage opening.
  • the method might also comprise an additional step of reducing the phenomena of shocks at times of closing or opening the valve, by providing an elastomeric sealing component of a round shape, suitable width and inherent flexibility, that from the instant of sealing the valve, is suited to be linked with the valve seat (375) as well as with at least a sector of the connecting edge (405) of the seat ring, and to be disconnected from it on the opening of the valve.
  • valves amenable to rigid sealing implementation of elliptically configuration flow passage, wherein its length axis (principal axis) is substantially perpendicular to the flow axis to the valve and away from it, instills significant advantages of reducing head losses and can also reduce the phenomena of shocks, in comparison to such valves wherein the sealing is implemented on flow passages with round configuration openings.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

La présente invention se rapporte à un clapet de commande hydraulique du type dans lequel le passage d'écoulement depuis son entrée d'écoulement jusqu'à sa sortie d'écoulement peut être scellé par un scellage rigide, le passage d'écoulement étant caractérisé en ce qu'il est formé comme une ouverture de configuration elliptique dont l'axe dans le sens de la longueur est sensiblement perpendiculaire à l'axe d'écoulement vers le clapet et loin de celui-ci. L'invention se rapporte également à un procédé destiné à réduire les pertes de charge dans de tels clapets grâce à la formation elliptique de leur passage d'écoulement.
PCT/IL2012/050197 2011-06-06 2012-06-05 Clapet de commande hydraulique à scellage rigide doté d'un passage d'écoulement de forme elliptique WO2012168939A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL213412 2011-06-06
IL213412A IL213412A (en) 2011-06-06 2011-06-06 A rigid sealable hydraulic control valve with an elliptical design flow pass

Publications (1)

Publication Number Publication Date
WO2012168939A1 true WO2012168939A1 (fr) 2012-12-13

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PCT/IL2012/050197 WO2012168939A1 (fr) 2011-06-06 2012-06-05 Clapet de commande hydraulique à scellage rigide doté d'un passage d'écoulement de forme elliptique

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IL (1) IL213412A (fr)
WO (1) WO2012168939A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3097608A1 (fr) * 2019-06-24 2020-12-25 Electricite De France Robinet à soupape

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973778A (en) * 1958-11-03 1961-03-07 Stephen C Baker Hydraulic valve
US3559950A (en) * 1967-11-21 1971-02-02 Gooddard Ind Inc Valve
US20040183044A1 (en) * 2003-03-20 2004-09-23 Wears William Everett Severe service control valve
US20050247901A1 (en) * 2004-05-07 2005-11-10 Hsin-Fa Wang Flow control valve for gardening pipe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973778A (en) * 1958-11-03 1961-03-07 Stephen C Baker Hydraulic valve
US3559950A (en) * 1967-11-21 1971-02-02 Gooddard Ind Inc Valve
US20040183044A1 (en) * 2003-03-20 2004-09-23 Wears William Everett Severe service control valve
US20050247901A1 (en) * 2004-05-07 2005-11-10 Hsin-Fa Wang Flow control valve for gardening pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3097608A1 (fr) * 2019-06-24 2020-12-25 Electricite De France Robinet à soupape
WO2020260264A1 (fr) 2019-06-24 2020-12-30 Electricite De France Robinet a soupape

Also Published As

Publication number Publication date
IL213412A0 (en) 2011-07-31
IL213412A (en) 2015-06-30

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