WO2000043700A1 - Vanne de limitation de pression - Google Patents

Vanne de limitation de pression Download PDF

Info

Publication number
WO2000043700A1
WO2000043700A1 PCT/NZ1999/000226 NZ9900226W WO0043700A1 WO 2000043700 A1 WO2000043700 A1 WO 2000043700A1 NZ 9900226 W NZ9900226 W NZ 9900226W WO 0043700 A1 WO0043700 A1 WO 0043700A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve member
pressure limiting
seal assembly
inlet
Prior art date
Application number
PCT/NZ1999/000226
Other languages
English (en)
Inventor
Robert Nicholas Edward Bolus
Original Assignee
Methven Limited
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 Methven Limited filed Critical Methven Limited
Priority to AU19008/00A priority Critical patent/AU766691B2/en
Priority to NZ513214A priority patent/NZ513214A/en
Publication of WO2000043700A1 publication Critical patent/WO2000043700A1/fr

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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston

Definitions

  • This invention relates to a pressure limiting valve, and in particular an in-line pressure limiting valve.
  • Pressure limiting or reducing valves are adapted to effect a reduction in pressure of a fluid passing through the valve, by automatic means, so that the outlet pressure is substantially constant irrespective of fluctuations in the inlet pressure.
  • pressure control valves have been reasonably bulky, particularly where the valve components have been oriented transverse to the flow.
  • the development of coaxial or in-line pressure limiting valves has enabled such valves to be produced in a form which is less obtrusive in that the difference in diameter of the valve in comparison with that of the inlet and outlet portions is much less.
  • pressure limiting valves In order to provide more accurate control over outlet pressure, pressure limiting valves have included pressure-compensation systems.
  • One such system is described in New Zealand Patent Specification No. 21 7527 which included a central passageway through the valve member to provide equal and opposite inlet pressures on either side of the valve member. The valve member is therefore only responsive to fluctuations in outlet pressure.
  • pressure compensation systems add complexity to the valve.
  • valve sealing component in most valves includes a washer which is secured to the valve seat by means of a centrally positioned securing means. Even where the washer is recessed into the washer holder, this still provides an opportunity for fluid, under pressure, to be forced behind the washer around the peripheral edges.
  • the problems which result include damage to the washer, and a tendency to produce unacceptable noise, such as whistling. This can be a particular problem in pressure limiting valves including pressure compensation systems.
  • New Zealand Patent Specification No. 223946 discloses a pressure limiting valve having three main parts, an inlet portion, a mid-portion and an outlet portion.
  • the valve seal forms a part of the inlet portion, whilst the valve member is engaged within the mid-portion between the inlet portion and the outlet portion.
  • the valve sealing component must be assembled before the various components are interconnected, and is only accessible by disassembly.
  • New Zealand Patent Specification No. 21 7527 discloses a pressure limiting valve having only two main parts, with the inlet and outlet portions directly interconnected. However, again the jumper valve and valve seal must be completed and installed before interconnection of the two main parts, and are not accessible without disassembly.
  • a pressure limiting valve of coaxial or in-line type and including an inlet chamber, an outlet chamber, a valve seal assembly in the inlet chamber, a moveable valve member in the outlet chamber, and a port between the inlet and the outlet chambers said port openable or closeable by axial movement of the valve member into and out of contact with sealing means of the valve seal assembly, the valve member biased at rest, by biasing means, away from the sealing means to leave the port open, and wherein in use, substantially no surface of the valve member is subject to an axial force from pressure in the inlet chamber.
  • valve member includes stabilising means to maintain axial alignment of the valve member.
  • valve member may include a valve body including a central bore, and an outer skirt having a shoulder portion, an outer face of the shoulder portion within the outlet chamber and subject to fluid pressure in that chamber.
  • stop means may be provided to limit axial movement of the valve member at its open position so that the shoulder portion remains exposed to outlet pressure when the valve is in its fully opened position.
  • the stabilising means may include oppositely disposed axial extensions of the valve member to form first and second contact points, longitudinally spaced apart, said first contact point between the valve member and an inner wall of the inlet body and the second contact point between the valve member and an inner wall of the outlet body.
  • the stabilising means may further include a peripheral portion of the outer skirt, said peripheral portion substantially in axial alignment with the central bore and forming a third contact point, between the valve member and the outlet body.
  • the central bore may include an inner profile adapted to facilitate axial flow through the bore.
  • a pressure limiting valve of coaxial or in-line type and including an inlet chamber, an outlet chamber, a valve seal assembly in the inlet chamber, a moveable valve member in the outlet chamber and a port between the inlet and the outlet chambers said port openable or closeable by axial movement of the valve member into and out of contact with sealing means of the valve seal assembly, the valve member biased at rest, by biasing means, away from the sealing means to leave the port open, and wherein the valve seal assembly may include sealing means engaged by engagement means on a support member, the engagement means engaging the sealing means by peripheral portions only.
  • the sealing means may comprise a cup washer.
  • the engagement means may include a ring portion adapted to form a tight engagement of the peripheral wall of the washer cup over the support member.
  • the engagement means may further include spaced- apart legs projecting from the retaining ring such that when ends of the legs abut a surface the retaining ring is spaced apart from that surface by the legs.
  • spaces between the legs of the engagement means may form the port.
  • valve seal assembly may be engageable within the valve through the inlet port after the body portions of the valve have been assembled.
  • a pressure limiting valve of coaxial or in-line type including an inlet body portion engageable with an outlet body portion, with a valve member engaged between the inlet body portion and the outlet body portion in a manner enabling axial movement of the valve member to position a valve seat of the valve member in contact with or spaced apart from a valve seal within the inlet body portion, the valve seal part of an assembly engageable within the inlet body portion after assembly of the other portions of the valve.
  • valve member for a pressure limiting valve substantially as herein described and with reference to the accompanying drawings.
  • valve seal assembly for a pressure limiting valve substantially as herein described and with reference to the accompanying drawings.
  • FIGURE 1 shows a cross-sectional view of a valve according to the invention in one preferred form, in a closed configuration
  • FIGURE 2 shows a cross-sectional view of the valve of Figure 1 in a open configuration
  • FIGURE 3 shows an exploded view of a valve assembly of Figures 1 and 2.
  • FIGURE 4 shows a cross-sectional view of a valve of the invention in an alternative embodiment, in an open configuration.
  • a valve 1 of the present invention includes an inlet body 2, an outlet body 3, a jumper valve 4 and a valve seal assembly 5.
  • the inlet body 2 includes inlet port 6, inlet chamber 7 and jumper valve support surface 8.
  • a recess 9 is included in the bore of the inlet body 2 to accommodate a spring clip 1 0 adapted to retain the valve seal assembly 5 in the inlet body 2 in an assembled valve.
  • a second recess 1 1 is included in the jumper valve support surface 8 to accommodate an O-ring 1 2 for sealing engagement between the jumper valve 4 and the jumper valve support surface 8.
  • the outlet body 3 includes an outlet port 1 5, an outlet chamber 1 6 and outer wall portion 1 7 adapted at the end 1 8 to engage with the inlet body 2 (for example by screw thread).
  • Spring chamber 1 9 is formed between the outer surface of a front part 20 of the inlet body, and the internal surface of the outer wall portion 1 7 of the outlet body 3.
  • the spring 22 (in Figure 3) is not shown in Figures 1 and 2.
  • An air vent 14 is provided through the outer wall portion 1 7 to facilitate movement of the jumper valve 4.
  • a recess 23 in the wall of the outlet chamber 1 6 is adapted to accommodate an O-ring 24 to form sealing engagement between the jumper valve 4 and the wall of the outlet chamber 1 6.
  • the valve seal assembly 5 has a base portion 30 adapted to form a snug engagement within the inlet body 2, a central member 31 , a washer support surface 32, a washer 33 and a washer retaining ring 34.
  • the central member 31 may, for example, be formed from a series of veins or webs 39 radiating from a central axis, each web 39 connecting the base portion 30 with the washer support surface 32.
  • the webs 39 can be seen in Figure 3. In that embodiment there are 6 webs, but more or less could be included.
  • the washer 33 is a "cup" washer which fits over the washer support surface 32. Washer retaining ring 34 engages over the peripheral sides 35 of the washer 33, securely engaging it on the washer support surface 32.
  • the washer retaining ring 34 as best seen in Figure 3, includes legs 36 extending from one side of the ring. In an assembled valve the ends 37 of the legs 36 abut against a stop 38 formed by an end portion of the inlet chamber 7.
  • valve seal assembly enables sealing engagement of the washer 33 on the washer support surface 32 without the need for any central hole in the washer, and excluding any access of fluid around the periphery of the washer, which with conventionally secured washers results in damage to the washer and/or unacceptable noise levels, such as a whistling noise.
  • the jumper valve 4 includes valve seat 40, internal shoulder portions 41 , outlet extension 42, and lateral extension 43.
  • the lateral extension 43 extends outwardly from the main body of the jumper valve to form outer shoulder portion 44, which in an assembled valve is in the outlet chamber 1 6.
  • Outer portion 45 of the lateral extension 43 is substantially parallel to but spaced-apart from the main body of the jumper valve 4 and has a buttress-type end 46 which, in use, engages against the spring 22.
  • the lateral extension 43 forms a "skirt" for the jumper valve 4.
  • the jumper valve 4 has a compact form and the seals required in an assembled valve to ensure that the spring chamber 1 9 remains dry (i.e. O-rings 1 2, 24) are relatively close together in terms of their longitudinal position in the valve. This enables the whole valve 1 to be produced in a relatively compact form.
  • the valve member contacts an inner wall of the inlet body, at jumper valve support surface 8, and the internal sides of the outlet port 1 5, via outlet extension 1 6. This results in two longitudinally spaced-apart points of contact that provide axial stability to the valve member.
  • the outer portion 45 of the "skirt" of the jumper valve 4 provides additional stability to the jumper valve 4 (i.e. inhibiting tilt) .
  • axial stability may also be provided where the o-rings 1 2, 24 are sufficiently separated longitudinally, and the jumper valve 4 is sufficiently long to extend over both seals.
  • valve seal assembly 5 may then be slid into the inlet port 6 of the assembled valve and secured in position by the spring clip 1 0.
  • the body of the valve including the jumper valve, can be fully assembled prior to introduction of the valve seal assembly.
  • the valve seal assembly can be manufactured separately, if necessary. An added benefit of this design is that, with a suitably selected, removeable, spring clip 10 the valve seal assembly may be replaceable without the need to disassemble the valve.
  • FIG. 4 An alternative assembly of a valve 1 of the invention is shown in Figure 4.
  • This assembly differs from the embodiment of Figure 1 in that the inlet body 2 is formed in two parts, an inner portion 60 and an outer portion 61 .
  • This embodiment differs from the embodiment of Figure 1 also in that the valve seal assembly 5 is retained in the inlet body 2 by a shoulder 62 in the outer portion 61 , rather than by a spring clip 10.
  • valve seal assembly 5 is first engaged in the inner portion 60, the outer portion 61 is then engaged with the inner portion 60, securing the valve seal assembly 5 in position, the jumper valve 4 is then positioned in the outlet chamber of the outlet body 3 and the formed inner body 2 is engaged with the outlet body 3. Operation of a valve as the present invention will now be described, with particular reference to Figures 1 and 2.
  • the jumper valve 4 is movable in an axial direction between a closed position (as shown in Figure 1 ) in which the valve seat 40 contacts the washer 33, to prevent the flow of fluid from the inlet chamber 7 to the outlet chamber 1 6, and an open position (as shown in Figure 2) in which the valve seat 40 of the jumper valve 4 is spaced apart from the washer 33 to allow fluid flow from the inlet chamber 7 to the outlet chamber 1 6 via opening 50.
  • the spring 22 provides a bias maintaining the jumper valve 4 in the open position.
  • the internal profile of the jumper valve including the internal shoulder portions 41 and outlet extension 42 facilitate the flow of fluid through the valve with minimal disturbance. This is also facilitated by the shape of the inlet chamber.
  • the direction of fluid flow is, at worst, at 90 ° to axial flow (i.e. no double back), thereby reducing any restriction of fluid flow.
  • the buttress type end 46 of the "skirt" of the jumper valve engaging with an internal shoulder 49 of the outer wall portion 1 7 of the outlet body 3 provides a stop for the jumper valve 4.
  • This feature ensures that a gap 51 is maintained between the outer shoulder portion 44 of the jumper valve 4 and the opposing face 52 of the outlet chamber 1 6.
  • fluid in the outlet chamber 1 6 acts on the outer shoulder portion 44 whether the jumper valve 4 is open or closed.
  • Other areas of the jumper valve 4 also are subject to a closing force from the outlet fluid pressure, including the shoulder portions 41 and outer rim 53.
  • the jumper valve 4 will close to shut off the supply of fluid. Once the outlet pressure has declined to a sufficient level the valve will open as the force applied by the spring overcomes the return force on the exposed surfaces of the jumper valve 4.
  • the valve is designed to control pressure in the outlet chamber, and therefore to be sensitive to pressure changes in the outlet rather than the inlet. This is achieved in the present valve without the need for a pressure compensation system, by ensuring that there is no surface of the jumper valve 4 exposed to the inlet pressure in a way which would provide an axial force on the jumper valve 4.
  • the jumper valve 4 is in its closed position, as in Figure 1 , the only surface exposed to the inlet chamber 7 is the end outer face 54 and there would be no force in an axial direction on this face.
  • a pressure limiting valve of the present invention enables the pressure limiting function, substantially governed by the outlet pressure only, without the need for a pressure compensation system.
  • the design of the valve facilitates axial flow of fluid through the valve.
  • the design of the valve, and particularly that of the jumper valve enables the valve to be produced in a compact form.
  • the valve seat assembly ensures that fluid pressure cannot interfere with the positioning of the washer, to damage it or cause unacceptable noises.
  • the body of the valve is formed from only two parts, and the valve as a whole is designed to be put together easily, with the valve seal simply engaged through the inlet of an otherwise assembled valve.

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

Abstract

Cette invention concerne une vanne de limitation de pression de type coaxial ou en ligne. Cette vanne comprend une chambre d'entrée, une chambre d'évacuation, un ensemble siège de vanne dans la chambre d'entrée, un élément de vanne mobile dans la chambre d'évacuation et un orifice entre les chambres d'entrée et d'évacuation. Cet orifice peut s'ouvrir et se fermer par un mouvement axial de l'élément de vanne en contact ou non avec le siège de l'ensemble siège de la vanne. La vanne est ouverte au repos, l'élément étant tenu à l'écart du siège par une force de ressort. Le principe est que sensiblement aucune surface de l'élément de vanne ne subisse de force axiale à raison de la pression s'exerçant dans la chambre d'admission. L'élément de vanne peut inclure un moyen de stabilisation permettant de maintenir l'élément de vanne de la vanne aligné dans l'axe. L'ensemble siège de la vanne peut inclure un siège qui est en contact avec un élément support uniquement par les parties périphériques dudit siège. Cette invention comprend aussi l'élément vanne et l'ensemble siège de vanne utilisé dans cette vanne de limitation de pression. Dans un mode de réalisation de la vanne de limitation de pression de l'invention, l'ensemble siège de vanne peut être mis en contact avec la partie entrée du corps de vanne après l'assemblage des autres parties de la vanne.
PCT/NZ1999/000226 1999-01-20 1999-12-23 Vanne de limitation de pression WO2000043700A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU19008/00A AU766691B2 (en) 1999-01-20 1999-12-23 Pressure limiting valve
NZ513214A NZ513214A (en) 1999-01-20 1999-12-23 Pressure limiting valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ333828 1999-01-20
NZ33382899 1999-01-20

Publications (1)

Publication Number Publication Date
WO2000043700A1 true WO2000043700A1 (fr) 2000-07-27

Family

ID=19927111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1999/000226 WO2000043700A1 (fr) 1999-01-20 1999-12-23 Vanne de limitation de pression

Country Status (2)

Country Link
AU (1) AU766691B2 (fr)
WO (1) WO2000043700A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003093708A1 (fr) * 2002-05-06 2003-11-13 Walter George Morrison Soupape regulatrice de pression
ITMI20121186A1 (it) * 2012-07-06 2014-01-07 Bome S R L Valvola di controllo della pressione
CN112113015A (zh) * 2020-09-18 2020-12-22 宁波方太厨具有限公司 稳压阀及包括其的燃气热水器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890999A (en) * 1972-12-15 1975-06-24 Eugene D Moskow Fluid pressure regulator
DE2533707A1 (de) * 1974-07-26 1976-03-25 Sharp Kk Sich selbst regelndes fluessigkeitsventil
AU6239386A (en) * 1985-09-11 1987-03-12 Actrol Industries Pty. Ltd. Pressure control valve
AU1353488A (en) * 1987-03-20 1988-09-22 Gsa Industries (Aust.) Pty Ltd Pressure control valve
US4825903A (en) * 1986-10-25 1989-05-02 Alfred Teves Gmbh Pressure control valve
US4862913A (en) * 1987-07-09 1989-09-05 Dieter Wildfang Kg Check valve
US4951707A (en) * 1989-04-10 1990-08-28 National-Oilwell Seal for a pump valve
GB2329692A (en) * 1997-09-25 1999-03-31 Sloan Valve Co Flushometer piston

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890999A (en) * 1972-12-15 1975-06-24 Eugene D Moskow Fluid pressure regulator
DE2533707A1 (de) * 1974-07-26 1976-03-25 Sharp Kk Sich selbst regelndes fluessigkeitsventil
AU6239386A (en) * 1985-09-11 1987-03-12 Actrol Industries Pty. Ltd. Pressure control valve
US4825903A (en) * 1986-10-25 1989-05-02 Alfred Teves Gmbh Pressure control valve
AU1353488A (en) * 1987-03-20 1988-09-22 Gsa Industries (Aust.) Pty Ltd Pressure control valve
US4862913A (en) * 1987-07-09 1989-09-05 Dieter Wildfang Kg Check valve
US4951707A (en) * 1989-04-10 1990-08-28 National-Oilwell Seal for a pump valve
GB2329692A (en) * 1997-09-25 1999-03-31 Sloan Valve Co Flushometer piston

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003093708A1 (fr) * 2002-05-06 2003-11-13 Walter George Morrison Soupape regulatrice de pression
US7275559B2 (en) 2002-05-06 2007-10-02 Morrison Walter G Pressure control valve
ITMI20121186A1 (it) * 2012-07-06 2014-01-07 Bome S R L Valvola di controllo della pressione
CN112113015A (zh) * 2020-09-18 2020-12-22 宁波方太厨具有限公司 稳压阀及包括其的燃气热水器
CN112113015B (zh) * 2020-09-18 2022-02-01 宁波方太厨具有限公司 稳压阀及包括其的燃气热水器

Also Published As

Publication number Publication date
AU1900800A (en) 2000-08-07
AU766691B2 (en) 2003-10-23

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