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WO2008074061A1 - Vanne améliorée - Google Patents

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Publication number
WO2008074061A1
WO2008074061A1 PCT/AU2007/001945 AU2007001945W WO2008074061A1 WO 2008074061 A1 WO2008074061 A1 WO 2008074061A1 AU 2007001945 W AU2007001945 W AU 2007001945W WO 2008074061 A1 WO2008074061 A1 WO 2008074061A1
Authority
WO
WIPO (PCT)
Prior art keywords
bonnet
valve according
valve
bore
seat
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/AU2007/001945
Other languages
English (en)
Inventor
Lawrence Smith
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2008074061A1 publication Critical patent/WO2008074061A1/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
    • F16K1/02—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 screw-spindle
    • F16K1/04—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 screw-spindle with a cut-off member rigid with the spindle, e.g. main 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means

Definitions

  • This invention relates to an improved valve.
  • This invention has particular but not exclusive application to an improved valve for domestic use as a tap or faucet for water, and for illustrative purpose reference will be made to such application. However, it is to be understood that this invention could be used in other applications such as valves for commercial or industrial use in chemical plant or such like.
  • Taps or faucets for domestic use may be of a rotary design which includes a valve body having a flow path therethrough, and a closure assembly comprising a bonnet screwed into the body and a spindle sealably passing through the bonnet and driving a tap washer into sealing engagement against a seat formed in the valve body across the flow path.
  • Valve maintenance requires occasional reseating. The reseating operation requires the valve to be isolated from the water supply and the bonnet and valve stem removed. The seat is then usually machined or ground until substantially flat, and then the closure assembly is replaced.
  • valve body makes it difficult to perform the reseating operation. Additionally, reseating limits the life of the valve, and replacement of the valve is costly and time consuming. Moreover, should the reseating operation damage the valve body, then the valve body has to be removed from the connecting plumbing and replaced. In domestic situations, to replace the valve body, the surrounding decor quite often needs restoration, adding to the cost of replacement. Further, the standard tap or faucet has an integral seat that must be configured to pass acceptable minimum flows across the range of supply water pressures. In high pressure areas this means that the maximum flows may be excessive and wasteful.
  • Valves having a separate seat ring have been provided.
  • the seat ring in such valves is usually located in a recess formed in the tap body and is retained between the valve body and the bonnet. This arrangement is prone to leakage around the seat ring.
  • valve assembly including a valve body having a flow path from an inlet to an outlet and valve closure assembly for selectively closing the flow path, the valve closure assembly including a bonnet threaded into the body and having a removable seat ring threaded into its body end, the flow path passing into the bonnet through ports and out through the seat ring, a spindle passing into the bonnet and selectively advancing toward and away from the seat, and a seal element supported by the spindle and advanced by it to close the bore, the body end of the bonnet being sealed across the flow path by an annular washer.
  • This arrangement eliminates the leakage around the seat ring, since the seat ring in this example doesn't have to seal to the tap body.
  • the ring requires a penetrating tool to install and remove, which reduces the seal section where the tool apertures are.
  • This invention aims to alleviate one or more of the above disadvantages and to provide an improved valve assembly which will be reliable and efficient in use.
  • this invention in one aspect resides broadly in a valve including: a valve body having an inlet and outlet forming a flow passage; a bonnet assembly having an inlet end, an annular seat supported at the inlet end for a valve closure located in the bonnet and having an axial spigot of bore length and diameter selected to provide a flow choke, an externally threaded side wall engaging the valve body and operable to sealably engage the inlet end with an annular land in the valve body about the flow passage, and a bonnet outlet providing for flow through the annular seat to pass the outlet; and a spindle assembly mounted in the bonnet assembly and adapted to selectively operate said valve closure.
  • the bonnet assembly be in the form of a conventional bonnet with a bonnet extension portion being provided and the annular seat being located at the bonnet extension.
  • the bonnet extension includes apertures forming the bonnet outlet extending through the wall of the bonnet to a space formed between the bonnet and the tap body.
  • the bonnet extension may be integrally formed with, or fixedly attachable to, the bonnet. The apertures provide the flow path out of the bonnet assembly.
  • the annular seat may be retained in the bonnet assembly or machined integrally with it.
  • the selectable bore may be provided in a threaded insert adapted to be screwed into the bore which may be threaded to accept it.
  • a selectable bore insert may be a plain clearance or interference fit in the integral seat.
  • the annular seat may be removable.
  • the annular seat may be threaded on its outer periphery to engage a correspondingly threaded inner bore in the bonnet inlet end.
  • the inner bore may be provided with a shoulder against which the threaded annular seat may be tightened.
  • the spigot bore may include internal surface features such as one or more keyways provided for engagement of a fitting and removal tool.
  • the spigot may be adapted to extend below the inlet end in use, and be provided with tool engaging means on its outer surface, such as spanner flats.
  • the extended length of the spigot provides several advantages.
  • the choke effect is increased for a given bore diameter, allowing relatively larger diameters and reduced likelihood of blockage.
  • the spigot length enables a lead-in to be machined in the inlet to the bore, providing hydrodynamic advantages including streamlining flow and reducing noise. This, and removal of the annular seat in relevant embodiments, is provided without diminution of the disc thickness attributable to the seat portion, thus reducing seat distortion and cracking.
  • the bore of the spigot may be any suitable diameter.
  • removable annular seats may be supplied with bores of 2, 3, 4 and 6mm, typically.
  • the overall length of the bore will be limited by the installed space in the tap body and by the need to maintain disc section in the sealing portion of the seat.
  • the sealing disc section is preferably between 2 to 8 mm thick, and the spigot from 6 to 10 mm long.
  • the length of the bore is preferably in the region of 10 to 15 mm.
  • the end of the bore toward the valve closure may be counter bored to relieve the choke if the overall length of the annular seat is too long.
  • the seal with the annular land may be made by an external sealing surface of a removable annular seat.
  • the seal with the annular land may be made with the rim of the inlet end.
  • the seal may be perfected by a sealing washer, O-ring or the like.
  • the spigot may serve to center the washer.
  • the washer may be adhered to the rim or external sealing surface to be withdrawn with it on removal of the bonnet assembly from the body.
  • the valve body includes a standard design domestic tap valve body having a valve seat (in this case used as the annular land), a bonnet assembly, a spindle assembly, tap washer assembly and washer.
  • the bonnet assembly When the valve is in the closed position, the bonnet assembly is positioned in the valve body so that the inlet end sealingly engages with the annular land (conventionally the valve seat) of the valve body and the spindle is positioned in the bonnet assembly so that the valve closure (or tap washer) is in sealing engagement with the annular seat.
  • the spigot extends through the annular land, centering the sealing washer between the inlet end and the annular land.
  • the spindle withdraws so that the valve closure is not in sealing engagement with the annular seat.
  • the inlet end remains in sealing engagement with the valve body, but fluid is permitted to flow into the spigot bore and through the flow path provided in the bonnet assembly. There is accordingly little if any wear on the seat in the valve body.
  • the annular seat is removed in assembly with the bonnet and spindle and is the only part that needs replacement, reducing the downtime for valve maintenance.
  • Fig. 1 is an exploded, part section, side view of a valve sub-assembly; and Figs. 2 to 5 are views of a selectable orificie element for use with the valve sub-assembly of Fig. 1 , and wherein Fig. 2 is the section C-C of Fig. 5; and
  • Fig. 6 is a section through the valve sub-assembly of Fig. 1 , assembled.
  • a valve sub-assembly includes a bonnet 10 adapted to be screwed into a tap body by 5/8" BSP body thread 17, and adjustably and sealably secured in the right position by a nitrile tap body washer 13 and a locking nut 12 having a 5/8" BSP internal thread 11.
  • Two mounting flats 14 permit the bonnet 10 to be tightened in to the tap body to a desired torque to seal the inlet end of the bonnet to the tap body.
  • the outlet from the bonnet 10 to the tap body outlet casting is provided by six apertures 18.
  • An external " A 1 " BSP thread 16 provides for installation of a cosmetic trim.
  • a spindle 22 is entirely conventional, having 1/8" BSP handle engagement threads 21 and handle mounting flats 20, and sealably engaging the bonnet 10 by respective 9/16" Whitworth spindle engagement threads 15 and 23, and O-ring seal 24.
  • a tap washer assembly 25 is conventionally engaged with a counter bore in the leading end of the spindle 22.
  • a threaded counter bore 19 in the inlet end of the bonnet 10 receives a removable annular seat 26 having a spigot extension 29.
  • the seat 26 is screwed in until it contacts the shoulder 28 of the counter bore 19, whereupon it may be tightened to torque by a spanner engaging flats 32 provided on the spigot extension 29.
  • the inner face 33 of the seat 26 forms a sealing face for the washer assembly 25.
  • the outer face 31 of the seat 26 forms, with washer 27, the aforementioned seal of the inlet end of the bonnet to the tap body. To this end, the outer face 31 causes the washer 27 to sealingly impress upon the tap body seat before the rim of the bonnet contacts the body about the seat.
  • the seat 26 is one of a set having bores 34 of 2, 3, 4 and 6mm respectively.
  • the lead in portions 30 taper in to the bore 34 to provide hydrodynamic quietening, and is confined to the spigot portion 29 to avoid reduction in section of the seat.
  • the spindle 22 has its O-ring 24 installed with spindle grease.
  • the respective 9/16" Whitworth spindle engagement threads 15 and 23 and the spindle bore of the bonnet 10 are also greased ahead of installing the spindle 22 in the bonnet 10.
  • the spindle is drawn well up into the inlet end of the bonnet 10.
  • the tap washer 25 is installed to the end of the spindle 22 and pushed into the bonnet 10.
  • the annular seat 26 is selected as to bore size and screwed into the counter bore 19 until it contacts the shoulder 28 and is tightened by the spanner flats 32. This traps the tap washer 25 in the bonnet 10.
  • the bonnet 10, spindle 22, tap washer 25 and seat 26, in assembly, are installed into the tap body with the washer 27 supported and centred by the spigot 29, the 5/8" BSP body thread 17 advancing the washer 27 into contact trapped between the outer sealing face 31 and the tap body seat.
  • the trapped washer 27 forms a compression seal by tightening the bonnet
  • Any cosmetic trim is installed to the external 14" BSP thread 16 ahead of installing a handle to the spindle 22 by flats 20 and securing it in place by a nut engaging the 1/8" BSP handle engagement threads 21.
  • the spindle 22 may then be operated to advance the tap washer into sealing engagement with the seat face 33 of the annular seat 26, ahead of turning on the water supply.
  • Apparatus in accordance with the foregoing embodiment has the advantages of having selective chokes to limit maximum flow rate for a given supply pressure.
  • the embodied apparatus reduces or eliminates tap body seat wear, enabling tap washer reseating without interference with the installed tap body.

Landscapes

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

Abstract

L'invention concerne une vanne comprenant un chapeau (10) conçue de manière à être vissée dans un corps de robinet (non représenté) et serrée de manière à assurer l'étanchéité de l'extrémité d'entrée du chapeau (10) par rapport au corps de robinet. La sortie allant du chapeau (10) au moulage de sortie du corps de robinet est munie de six ouvertures (18). Une tige de manœuvre (22) vient en prise avec le chapeau (10) au moyen de filetages de mise en prise de tige de manœuvre (15) et (23), et d'un joint torique (24). Un ensemble de rondelle de robinet (25) vient en prise avec l'extrémité de la tige de manœuvre (22). Un outil de lamage fileté (19) dans l'extrémité d'entrée du chapeau (10) reçoit un siège annulaire amovible (26) présentant une extension de bout mâle (29). La face interne (33) du siège (26) forme une face d'étanchéité pour l'ensemble de rondelle (25). La face externe (31) du siège (26) forme, avec la rondelle (27), l'étanchéité de l'extrémité d'entrée du chapeau par rapport au corps de robinet. Le siège (26) fait partie d'une ensemble présentant des alésages (34) de 2, 3, 4 et 6 mm respectivement. Les parties d'entrée (30) rétrécissent progressivement dans l'alésage (34) de manière à fournir une atténuation hydrodynamique, et sont confinées à la partie de bout mâle (29) de manière à éviter une réduction en section du siège. L'appareil présente l'avantage de disposer d'étrangleurs sélectifs, afin de limiter le débit maximal pour une pression d'alimentation donnée, et d'une usure du siège de corps de robinet réduite.
PCT/AU2007/001945 2006-12-21 2007-12-17 Vanne améliorée Ceased WO2008074061A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2006252203A AU2006252203A1 (en) 2006-12-21 2006-12-21 An improved valve
AU2006252203 2006-12-21

Publications (1)

Publication Number Publication Date
WO2008074061A1 true WO2008074061A1 (fr) 2008-06-26

Family

ID=37835017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2007/001945 Ceased WO2008074061A1 (fr) 2006-12-21 2007-12-17 Vanne améliorée

Country Status (2)

Country Link
AU (1) AU2006252203A1 (fr)
WO (1) WO2008074061A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106747A (en) * 1976-12-16 1978-08-15 Malacheski Joseph J Valve construction
GB2190468A (en) * 1986-05-14 1987-11-18 Whitey Co Metering valve
JPH09303573A (ja) * 1996-05-10 1997-11-25 Mitsubishi Heavy Ind Ltd 弁座取外し型プラグ弁
US6820857B1 (en) * 2002-11-07 2004-11-23 Noshok, Inc. Needle valve with soft tip stem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106747A (en) * 1976-12-16 1978-08-15 Malacheski Joseph J Valve construction
GB2190468A (en) * 1986-05-14 1987-11-18 Whitey Co Metering valve
JPH09303573A (ja) * 1996-05-10 1997-11-25 Mitsubishi Heavy Ind Ltd 弁座取外し型プラグ弁
US6820857B1 (en) * 2002-11-07 2004-11-23 Noshok, Inc. Needle valve with soft tip stem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199806, Derwent World Patents Index; Class Q66, AN 1998-060613 *

Also Published As

Publication number Publication date
AU2006252203A1 (en) 2007-02-15

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