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EP0246271A1 - Soupape d'abaissement de la pression ayant un nouveau joint d'etancheite soulevant - Google Patents

Soupape d'abaissement de la pression ayant un nouveau joint d'etancheite soulevant

Info

Publication number
EP0246271A1
EP0246271A1 EP86906543A EP86906543A EP0246271A1 EP 0246271 A1 EP0246271 A1 EP 0246271A1 EP 86906543 A EP86906543 A EP 86906543A EP 86906543 A EP86906543 A EP 86906543A EP 0246271 A1 EP0246271 A1 EP 0246271A1
Authority
EP
European Patent Office
Prior art keywords
poppet
seal
seat
groove
pressure
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.)
Withdrawn
Application number
EP86906543A
Other languages
German (de)
English (en)
Other versions
EP0246271A4 (fr
Inventor
Ralph R. Rogers
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.)
Brunswick Valve and Control Inc
Original Assignee
Brunswick Valve and Control Inc
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 Brunswick Valve and Control Inc filed Critical Brunswick Valve and Control Inc
Publication of EP0246271A1 publication Critical patent/EP0246271A1/fr
Publication of EP0246271A4 publication Critical patent/EP0246271A4/fr
Withdrawn legal-status Critical Current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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0426—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with seat protecting means

Definitions

  • This invention relates to pressure relief valves, and more particularly, to those utilizing spring loaded poppet closure members wherein the poppet head retains a resilient seal.
  • the invention further pertains in particular to 'poppet-type relief valves wherein relief action in valve discharge is proportional to a predeter- mined overpressure as opposed to the more commonly utilized "pop" or total relief operation.
  • the invention disclosed herein provides pressure relief for fluids, i.e. gases and liquids, at pressures as high as 12,000 psi.
  • Relief valves of this type are utilized to protect pressurized vessels or conduits from frequently occurring overpressures.
  • the "proportional" relief characteristic limits the discharge of overpres- sured product to the minimum required for vessel or conduit protection without releasing excessive amounts of product, either to the atmosphere or capture means.
  • Pressure relief of this type can be characterized as overpressure "regulation”.
  • a valve of the proportional relief type is disclosed and claimed in U.S. Patent 4,402,341, incorporated by reference hereto.
  • Presently utilized valves, while providing satisfac ⁇ tory operation have substantial limitations, particular ⁇ ly when operating in the regulating mode, i.e.
  • the invention disclosed herein overcomes these difficulties in providing a valve structure exhibiting extremely small poppet reset (i.e. poppet reseating) hysteresis or high blowdown pressure.
  • This characteris ⁇ tic is due to a novel pressure actuated seal utilizing a high strength deformation resistant seal material.
  • the disclosed seal utilizes product pressure at the cracking level to adjust sealing action, thereby- retaining the seal in its poppet groove without seal damage.
  • incorporation of a resilient self- retaining poppet seal provides a pressure relief valve having high blowdown pressure, i.e. small pressure/valve closure differential, in a valve construction demonstrat ⁇ ing greatly increased poppet seal life.
  • Utilization of an elastomeric seal further provides a pressure relief valve having substantially reduced valve leakage or "dribble" at the relief or cracking pressure level.
  • the invention disclosed herein provides a propor- tional or "regulating" type of pressure relief valve incorporating a poppet and novel poppet seal demonstrat ⁇ ing a very narrow relief/reset pressure differential.
  • the disclosed poppet seal incorporates a composite elastomeric/spring reinforced seal of known design, uniquely applied to the poppet/seal interface.
  • the disclosed invention provides a poppet seal providing pressure actuated operation for product pressures below and during "cracking" operation.
  • the novel poppet/seal construction results in pressure actuated seal forces which are automatically shifted from the poppet/seat interface to the poppet/stem interface. This action provides low leakage sealing below the cracking pressure and seal retention during "cracking" of the poppet/seat seal and full relief action.
  • the invention disclosed demonstrates very low hysteresis or high blowdown pressures typically at relief settings of 3,100 psi, a reset pressure of 3,195 psi.
  • the disclosed valve is adjustable under pressure, and utilizes a sealed calibration spring chamber. This construction greatly reduces product attack on the valve calibration spring, thereby substan ⁇ tially increasing the reliability of pressure relief settings.
  • Figure 1 shows the relief valve of the disclosed invention in section, particularly showing the poppet and poppet seal in relation to the poppet seat, and calibrat ⁇ ing spring assembly.
  • Figure 2 shows a sectional view of the novel seal of the invention, wherein the poppet/seat assembly is below relief or cracking pressure. Particularly shown is the location of the poppet/poppet seat, and seal actuation by product pressure.
  • Figure 2A shows the seat seal of Figure 2, at the relief or "cracking" pressure. Particularly shown is the product pressure and shift of poppet seal forces from engagement with the valve seat to engagement with the poppet stem.
  • Figure 2B shows the seat/seal assembly of Figure 2 in full relief. Particularly shown are product flow paths with seal retaining forces.
  • Figure 3 is an alternate, resilient seal construc ⁇ tion particularly showing bonded laminations of rein ⁇ forced fluorosilicon material.
  • a relief valve assembly 2 comprising a valve body 4 having an inlet 6, and outlet 10. Internal of the valve body 4 is a poppet chamber 5, a spring chamber 7, and a retained spring adjusting member , 36.
  • the product inlet and relief outlets 6 and 10 further incorporate product inlet and exhaust orifices 8 and 12, respectively, communicating with the product poppet chamber 5.
  • a valve seat 18 is intermediate the valve inlet orifice 8, and poppet chamber 5.
  • poppet assembly 16 is located in the poppet chamber 5, and mounted for reciprocal motion therein.
  • the poppet assembly 16 comprises a poppet head 17, and a poppet .seal assembly 22.
  • a poppet stem 20 Distal said poppet seal assembly on said poppet head 17 and extending therefrom is a poppet stem 20.
  • a poppet stem guide 26 Surrounding said poppet stem is a poppet stem guide 26 having a spring retaining end 21.
  • a slideably engaging seal 28 prevents product flow from entering the spring chamber 33.
  • the end 21 abuts the valve pressure calibration spring retainer 32, so as to supply predetermined axial force to the poppet assembly 16, thereby calibrating the valve pressure relief or cracking pressure.
  • the spring ; 30 is held between the retainer 31 and adjuster 32.
  • the spring retainer 31 is a spring adjuster and retainer threadably engaged with the upper end of the valve body 4 by threads 36 located on the relief spring adjuster barrel 34. Forces exerted by spring 30 are adjusted by turning the upper end of the adjuster barrel 34, thereby controlling valve relief pressures through control of forces applied to the upper end of the valve poppet stem 20.
  • seal action described above retains seal 22 during the initial poppet motion at the "cracking" pressure. This operation is in sharp contrast with the action of resilient seals currently in use, wherein the deformable characteristic of the seal material results in removal of the seal from its retaining groove, or the necessity of using pressure relief vents in order to ensure seal retention within its groove. Seal retention at small poppet lifts provides reliable valve operation in "proportional" relief operation.
  • a seal assembly 32 comprises a multiplicity of laminated layers 34, bonded within the poppet seal groove 36.
  • the individual, essentially .disc-like laminar layers 36 comprise a fabric reinforced fluorosilicon plastic.
  • the laminar construction provides an essentially resilient series of planar seal elements 38, each conforming to the particular seal-seat geometry, providing a low leak valve structure at pressures below "cracking" product pressures.
  • the composite structure disclosed is composed of fabric reinforced fluorosilicon plastic in a laminar molded construction, bonded to the poppet seal retention groove, there is provided a novel fluorosilicon poppet/seat relief valve seal.
  • poppet/seat seal provides an essentially non-product sensitive seal, deformable in nature, heretofore unknown in poppet type relief valves.

Landscapes

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

Abstract

La soupape de décharge doseuse (2) ci-décrite comporte de nouvelles structures de joints d'étanchéité soulevant (22, 32). L'incorporation de fluorocarbone renforcé par du métal dans une nouvelle structure en forme de U (22) permet d'obtenir un joint d'étanchéité actionné par la pression entre la tige et le siège. L'action de la pression est maintenue pour des positions de "craquage" (séparation) et de décharge totale de la tige (16), préservant ainsi l'intégrité joint d'étanchéité/rainure. Une variante de joint d'étanchéité à tige déformable (32) utilise une structure à disques multiples laminés (38) liée à la fois à la rainure d'étanchéité (36) et à la tige (34).
EP19860906543 1985-10-04 1986-10-02 Soupape d'abaissement de la pression ayant un nouveau joint d'etancheite soulevant. Withdrawn EP0246271A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78416185A 1985-10-04 1985-10-04
US784161 1985-10-04

Publications (2)

Publication Number Publication Date
EP0246271A1 true EP0246271A1 (fr) 1987-11-25
EP0246271A4 EP0246271A4 (fr) 1988-02-15

Family

ID=25131540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860906543 Withdrawn EP0246271A4 (fr) 1985-10-04 1986-10-02 Soupape d'abaissement de la pression ayant un nouveau joint d'etancheite soulevant.

Country Status (3)

Country Link
EP (1) EP0246271A4 (fr)
JP (1) JPS63502206A (fr)
WO (1) WO1987002113A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004038190A1 (de) * 2004-08-06 2006-03-16 Elringklinger Ag Dichtungsbaugruppe für ein Ventil
DE102006013667A1 (de) * 2006-03-24 2007-09-27 Robert Bosch Gmbh Thermische Entgratanlage mit Schnellentlüftung
IT1399709B1 (it) * 2010-04-22 2013-04-26 P M M Di Montresor Gianfranco Valvola di massima
US20140367602A1 (en) * 2013-06-12 2014-12-18 Smith International, Inc. Valve member with composite seal
US10060536B2 (en) 2016-05-30 2018-08-28 Garrett Transportation I Inc. Turbocharger waste gate poppet valve with flexible sheet metal sealing member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1214285A (fr) * 1957-10-30 1960-04-07 Seetru Ltd Perfectionnements aux bagues d'étanchéité pour soupapes
US3200839A (en) * 1962-08-17 1965-08-17 Nuclear Products Company Safety relief valve
FR2410773A1 (fr) * 1977-11-30 1979-06-29 Nemetz Josef Soupape de securite

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US556037A (en) * 1896-03-10 Carl w
US1841029A (en) * 1928-07-13 1932-01-12 Alfred E Hamilton Valve
US4362184A (en) * 1980-01-28 1982-12-07 Iakovos Marabeas Valve with spring biased seal
US4377892A (en) * 1980-12-10 1983-03-29 Worcester Controls Corp. Method of fabricating sintered metal/polymer impregnated ball valve seats
US4355654A (en) * 1981-02-26 1982-10-26 Midland-Ross Corporation Fluid flow control device for monitoring the fluid flow in a conduit for leakage of fluid
US4408632A (en) * 1981-04-23 1983-10-11 Brunswick Corporation High flow shroud check valve
US4525910A (en) * 1983-08-08 1985-07-02 Vernay Laboratories, Inc. Resilient tipped needle valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1214285A (fr) * 1957-10-30 1960-04-07 Seetru Ltd Perfectionnements aux bagues d'étanchéité pour soupapes
US3200839A (en) * 1962-08-17 1965-08-17 Nuclear Products Company Safety relief valve
FR2410773A1 (fr) * 1977-11-30 1979-06-29 Nemetz Josef Soupape de securite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8702113A1 *

Also Published As

Publication number Publication date
WO1987002113A1 (fr) 1987-04-09
JPS63502206A (ja) 1988-08-25
EP0246271A4 (fr) 1988-02-15

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19890303

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Inventor name: ROGERS, RALPH, R.