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WO2003001091A2 - Structure de vanne equilibree - Google Patents

Structure de vanne equilibree Download PDF

Info

Publication number
WO2003001091A2
WO2003001091A2 PCT/IL2002/000466 IL0200466W WO03001091A2 WO 2003001091 A2 WO2003001091 A2 WO 2003001091A2 IL 0200466 W IL0200466 W IL 0200466W WO 03001091 A2 WO03001091 A2 WO 03001091A2
Authority
WO
WIPO (PCT)
Prior art keywords
valve
hollow stem
housing
valve seat
valve according
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/IL2002/000466
Other languages
English (en)
Other versions
WO2003001091A3 (fr
Inventor
Peretz Rosenberg
Oded Katz
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.)
Plasson Ltd
Original Assignee
Plasson 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 Plasson Ltd filed Critical Plasson Ltd
Priority to AU2002309242A priority Critical patent/AU2002309242A1/en
Publication of WO2003001091A2 publication Critical patent/WO2003001091A2/fr
Publication of WO2003001091A3 publication Critical patent/WO2003001091A3/fr
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
    • 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
    • F16K1/12—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 with streamlined valve member around which the fluid flows when the valve is opened
    • F16K1/123—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 with streamlined valve member around which the fluid flows when the valve is opened with stationary valve member and moving sleeve

Definitions

  • the present invention relates to fluid valves, and particularly to fluid valves of a balanced construction such that they require very little force to actuate them to their open or closed positions.
  • valve constructions are known for controlling the flow of a fluid, such as a liquid (e.g., water) or a gas (e.g., air). Most of the known valve constructions require a significant force to actuate them from one position to the other, e.g., from the open position to the closed position, or vice versa. However, there are many applications where significant forces are not available, or not conveniently provided, for actuating the valve from one condition to the other, and yet a fast-action operation of the valve is desired. In addition, efforts are continually being made to provide valve designs which are efficient in operation and which are of a relatively simple construction so as to permit volume production at low cost. An object of the present invention is to provide a fluid valve of a simple construction which permits volume production at low cost, and which provides a balanced operation so as to minimize the amount of force needed for actuating it from one condition to the other.
  • a fluid valve of a simple construction which permits volume production at low cost, and which provides a balanced operation so as to minimize the amount of force needed for
  • a fluid control valve having a balanced construction, requiring very little force to actuate it, comprising: a housing including at least one inlet port and at least one outlet port; a valve seat located within the housing between the ports; and a hollow stem having one end located within the housing facing and adjacent to the valve seat, and an opposite end facing and aligned with one of the ports; the hollow stem and valve seat being supported relative to each within the housing such that one is movable relative to the other: (a) to cause the one end of the hollow stem to be spaced from the valve seat, and thereby to open the valve to the flow of fluid through the hollow stem from the inlet port to the outlet port; or (b) to cause the one end of the hollow stem to be moved into firm contact with the valve seat and thereby to close the valve to the flow of fluid from the inlet port to the outlet port.
  • the valve seat is fixed within the housing, and the hollow stem is movable within the housing.
  • the hollow stem has the same cross-sectional area at the end thereof facing and aligned with the housing port as at the end located within the housing, such that the valve is fully pressure-balanced in position and requires a relatively small force to move it to a different position.
  • the hollow stem has a different cross-sectional area at its opposite ends such that the valve is normally urged to either its open position or its closed position with respect to the valve seat.
  • a fluid valve constructed in accordance with the foregoing features produces a pressure-balanced operation requiring a minimum force for actuating it from one condition to the other.
  • a valve may be constructed of a few relatively simple parts which can be produced in volume and at low cost.
  • the hollow stem is coupled to a manual operator for moving the stem to its valve-open or valve-closed position with respect to the valve seat.
  • the hollow stem is coupled to a float operator for moving it to its valve-open or valve-closed position.
  • the inlet port and the outlet port have axes at an angle to each other. In such an arrangement, it is fairly simple to couple an external operator, such as a manual operator or float operator, to the hollow stem to move it to its open and closed positions.
  • the inlet port and the outlet port have coaxial axes.
  • the housing stem is moved to its open and closed positions by a ring movably mounted externally of the housing coupled to the hollow stem moving the ring in one direction moves the hollow stem axially in one direction to its valve-open position, and moving the ring in the opposite direction moves the hollow stem axially in the opposite direction to its valve-closed position.
  • Fig. 1 is a longitudinal sectional view illustrating an assembly including one form of fluid control valve constructed in accordance with the present invention wherein the housing is a T-fitting for use in manually controlling fluid (e.g., water) flow from a main line to a branch line;
  • Fig. 2 is a side elevational view illustrating the valve in Fig 1 ;
  • Fig. 3 is a bottom plan view illustrating the valve of Fig. 2;
  • Fig. 4 is a side elevational view illustrating the hollow stem and the manual operator of the valve as shown in Fig. 1 ;
  • Fig. 5 is a sectional view illustrating another valve constructed in accordance with the present invention.
  • Fig. 6 is a view similar to that of Fig. 5 but showing a modification in the valve to make the valve normally-open;
  • Fig. 7 is a view similar to that of Fig. 5 but illustrating a modification to make the valve normally-closed;
  • Fig. 8 illustrates another valve constructed in accordance with the present invention operated by a float;
  • Fig. 9 is an exploded three-dimensional view illustrating another valve constructed in accordance with the present invention wherein the valve housing has coaxial inlet and outlet ports; and Fig. 10 is a longitudinal sectional view illustrating the valve of Fig. 9 in its valve-closed position.
  • Fig. 1 illustrates a valve, generally designated 2, constructed in accordance with the present invention including a housing 3 in the form of a T-fitting for interconnecting three tubes 4, 5, 6 of a fluid (e.g., water) system.
  • housing 3 includes three ports constituted of coupling 3 a to receive tube 4, coupling 3b to receive tube 5 in-line with tube
  • tube 4 is the upstream side of a water supply system
  • tube 5 is the downstream side
  • tube 6 is a branch line for supplying water to various irrigation devices, such as sprinklers, sprayers, drip-irrigation emitters, or the like, under the control of valve 2.
  • valve 2 is controlled by a manual operator 7 in the form of a control rod passing through a wall of housing 3 and having a knob 8 externally of the housing to facilitate manual actuation of the valve 2 either to its open position or to its closed position.
  • valve 2 The construction of valve 2 is more particularly illustrated in Figs. 2 and 3. It includes a cylindrical valve holder 10 having an outer diameter to be frictionally received within coupling 3 c of housing 3. One end of valve holder 10 is formed with an enlarged head 11 having an outer diameter enabling it to be frictionally-received within tube 6. The opposite end of valve holder 10 is partially closed by an end wall 12 (Fig. 3), but is open to the interior of housing 3 by a plurality of openings in the form of axially-extending, circumferentially-spaced slots 13. End wall 12 is integrally formed with a bushing 14 having a passageway therethrough for receiving and guiding the movement of the control rod 7.
  • valve seat 15 is fixed within valve holder 10 adjacent to the end wall 12, i.e., in an intermediate position with respect to slots 13 formed in the valve holder.
  • Valve seat 15 cooperates with a cylindrical, hollow valve stem 16 (Figs. 1 and 4) for opening and closing the valve.
  • hollow valve stem 16 passes through a seal 17 in valve holder 10 such that one end 16a of the hollow stem is disposed within housing 3 facing, and adjacent to, the valve seat 15, whereas the opposite end 16b of the hollow stem is externally of the housing.
  • Control rod 7 passes through bushing 14 in the end wall 12 of the valve holder 10 and through the hollow stem 16 to its opposite end 16b, where it is connected to a transverse pin 18.
  • End 16b of the hollow stem is otherwise open so as to establish a flow passageway through housing 3 via the interior of the hollow stem to the interior of tube 6.
  • a hole 19 is provided in end 16b of the hollow stem externally of housing 3 to enlarge this flow passageway.
  • tube 4 is connected to a water supply system so as to serve as an inlet to the branch tube 6, supplying water to sprinklers, sprayers, etc., under the control of valve 2 within housing 3.
  • the illustrated valve operates as follows:
  • valve 2 is in its closed condition, which is effected by pulling manual control rod 7 outwardly to move the hollow stem 16 to firmly seat its end 16a against the valve seat 15.
  • this closed condition of the valve communication between the interior of tube 4 and the interior of the hollow stem 16 is blocked by the seating of stem end 16a on the valve seat 15, thereby preventing the flow of water from tube 4 to tube 6.
  • valve 2 In order to open the valve 2 and thereby to permit water flow from tube 4 to tube
  • control rod 7 is pushed inwardly to lift the hollow stem 16 so that its end 16a is spaced from the valve seat 15.
  • the water is permitted to flow via the slots 13 in the valve holder 10, and the space between end 16a of the hollow stem 16 and the valve seat 15, into the interior passageway of the hollow stem, and from there to the interior of tube 6.
  • Fig. 5 illustrates another valve constructed in accordance with the invention, including housing 20 having one port 23 serving as an inlet, a second port 24 serving as an outlet, and a valve seat 25 fixed within the housing between the two ports.
  • the valve in Fig. 5 further includes a hollow stem 26 passing through a seal 27 in the housing outlet port 24, such that one end 26a of the hollow stem faces and is adjacent to the valve seat 25, whereas the opposite end 26b of the hollow stem faces, is aligned with, and extends externally of the outlet port 24.
  • the valve illustrated in Fig. 5 may be manually operated in the same manner as described above with respect to Figs. 1 — 4.
  • Hollow stem 26 in the valve of Fig. 5 is also of uniform diameter, such that the diameter Di of its end 26a facing the inlet port 23 and cooperable with the valve seat 25 is of the same diameter Do as its end 26b passing through the seal 27 around the outlet port
  • this valve is also fully balanced and requires a relatively small force to move it to a different position, as described above with respect to Figs. 1 - 4.
  • Fig. 6 illustrates a valve constructed as in Fig. 5, and therefore identified by the same reference numerals, except that the hollow stem 26 is not of uniform diameter.
  • the outlet pressure applied to the larger diameter Do is more effective to move the hollow stem 16 away from valve seat 25 than the inlet pressure applied to the smaller diameter Di to move the hollow stem toward the valve seat, such that the valve illustrated in Fig. 7 would be normally open, but could be closed by a relatively small force as described above with respect to Figs. 1 - 4.
  • Fig. 7 illustrates the reverse arrangement, wherein the diameter Di of end 26a" of the hollow stem 26 is slightly larger than the diameter Do, such that the valve would be normally closed, but could be opened by a relatively small force.
  • Fig. 8 illustrates a valve, generally designated 30, constructed in accordance with the invention and actuated by a float 31.
  • the valve 30 includes a valve holder fitting 32 received within a housing 33 formed at one end with a port 33a to be coupled to an inlet tube, and at its opposite end with a port 33b to be coupled to a reservoir 34 for the water to be controlled by the float 31.
  • Housing 30 includes a valve seat 35 fixed between the two ports, and a hollow stem 36 movable through a seal 37 within the housing 33, such that one end 36a of the hollow stem faces and is adjacent to the fixed valve seat 35, and the opposite end 36b is coupled to the float 31.
  • Fitting 32 is formed with a plurality of openings 38 to permit the inletted water to flow into the interior of the fitting between it and the hollow stem 36.
  • end 36a of the hollow stem facing the inlet port 33a is of the same diameter as end 36b of the hollow stem passing through the seal 37 and facing the outlet port leading to the interior of container 34.
  • Float 31 controls the seating and unseating of end 36a of the hollow stem to control the flow of the water via hollows stem
  • FIG. 8 illustrates the valve illustrated in Fig. 8 and the valve illustrated in Fig. 8 such that a relatively small force will move it from one position to the other.
  • Figs. 9 and 10 illustrate the invention implemented in a valve for use in an in-line system, i.e., wherein the inlet and outlet ports of the valve housing are coaxial rather than perpendicular as in the previously-described embodiments.
  • valve illustrated in Figs. 9 and 10, therein generally designated 40 includes a housing formed of two sections 41, 42, each formed with one of the housing ports, as shown at 41a and 42a, respectively.
  • the two housing sections 41, 42 are threadedly attachable to each other, as shown at 43, such that the two ports 41a, 42a have coaxial axes.
  • the valve is therefore usable in an in-line fluid system wherein housing section 41 is connectable to one tube of the line, and housing section 42 is connectable to the other tube of the line.
  • port 41a in housing section 41 may be considered the inlet port to valve 40
  • port 42a formed in housing section 42 may be considered as the outlet port; but it will be appreciated that such inlet and outlet connections may be reversed.
  • Valve 40 further includes a valve seat 45 located within the housing defined by the two sections 41, 42.
  • Valve seat 45 cooperates with a hollow stem 46 having one end 46a located within the housing facing and adjacent to valve seat 45, and an opposite end
  • Valve seat 45 is located within the housing by a plastic body 47 formed with a plurality of spider arms 48 engaging, or press-fitted within, the inner surface of housing section 42 adjacent to the inlet port 41a.
  • Valve seat 45 is secured to the plastic body 47 by a threaded fastener 49 passing through the center of the valve seat. Hollow stem 46 is movable towards and away from valve seat
  • Hollow stem 46 is moved to its open and closed positions by an operator in the form of a ring 50 rotatably mounted to housing section 42 as shown particularly in Fig. 9.
  • Ring 50 is constituted of two half-sections 50a, 50b which are secured together around the housing by a pair of threaded fasteners 51a, 51b.
  • housing section 42 is formed with a pair of opposed cam slots 52a, 52b, adapted to receive projections 53a, 53b (Fig. 10) extending inwardly of the two half-section rings 50a, 50b and through the cam slots 52a, 52b.
  • Hollow stem 46 further includes a pair of sealing rings 55a, 55b straddling the opposed recesses 54a, 54b. A further sealing ring is provided between the two housing sections 41a, 42a.
  • cam slots 52a, 52b, engaged by the projections 53a, 53b of the hollow ring will cause the ring 50, and also the hollow stem 46, to move, not only rotatably about the longitudinal axis of the hollow stem, but also axially of the longitudinal axis, i.e., towards or way from the valve seat 45.
  • rotating ring 50 in one direction will move hollow stem 46 towards valve seat 45 to close the valve
  • rotating ring 50 in the opposite direction will move the hollow stem away from the valve seat 45 to open the valve. Since hollow stem 46 produces a balanced construction as in the previously-described embodiments, relatively little force is required to open and close the valve.
  • operator 50 could be a barton or pair of bartons, and they could be movable axially, rather than rotatably, with respect to the axis of the hollow stem.
  • valor seat unit could be freely located within the housing, rather than press-fitted therein.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

L'invention concerne une vanne de régulation de fluide possédant une structure équilibrée. Ladite vanne requiert peu de force pour être activée, elle comprend un logement pourvu d'un orifice d'alimentation et d'un orifice de sortie, un siège situé à l'intérieur du boîtier entre les orifices, et une tige creuse dotée d'une extrémité située à l'intérieur du logement et qui fait face au siège et est adjacente à ce dernier, et une extrémité opposée faisant face à l'un des orifices avec lequel elle est alignée. La tige creuse et le siège sont supportés l'un par rapport à l'autre à l'intérieur du logement de telle façon qu'ils soient mobiles l'un par rapport à l'autre : a) afin de provoquer l'espacement entre l'une des extrémités de la tige creuse et le siège, et ainsi ouvrir la vanne au flux de fluide à travers la tige creuse, de l'orifice d'alimentation à l'orifice de sortie ; ou b) afin d'amener une extrémité de la tige creuse en contact ferme avec le siège et ainsi fermer la vanne au flux de liquide, de l'orifice d'alimentation à l'orifice de sortie.
PCT/IL2002/000466 2001-06-21 2002-06-16 Structure de vanne equilibree Ceased WO2003001091A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002309242A AU2002309242A1 (en) 2001-06-21 2002-06-16 Balanced valve construction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL143912 2001-06-21
IL14391201A IL143912A0 (en) 2001-06-21 2001-06-21 Balanced valve construction

Publications (2)

Publication Number Publication Date
WO2003001091A2 true WO2003001091A2 (fr) 2003-01-03
WO2003001091A3 WO2003001091A3 (fr) 2003-05-15

Family

ID=11075537

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2002/000466 Ceased WO2003001091A2 (fr) 2001-06-21 2002-06-16 Structure de vanne equilibree

Country Status (3)

Country Link
AU (1) AU2002309242A1 (fr)
IL (1) IL143912A0 (fr)
WO (1) WO2003001091A2 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190231A (en) * 1974-05-21 1980-02-26 Ettore Vimercati Bilaterally balanced fluid control valve
SE394607B (sv) * 1975-11-06 1977-07-04 Atlas Copco Ab Padragsventil for ett pneumatiskt drivet verktyg
US4167262A (en) * 1976-10-12 1979-09-11 Hunt Valve Co., Inc. Pilot actuated valve

Also Published As

Publication number Publication date
AU2002309242A1 (en) 2003-01-08
WO2003001091A3 (fr) 2003-05-15
IL143912A0 (en) 2002-04-21

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