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WO1993013343A1 - Moyen d'etancheite pour elements subissant une pression - Google Patents

Moyen d'etancheite pour elements subissant une pression Download PDF

Info

Publication number
WO1993013343A1
WO1993013343A1 PCT/US1992/011226 US9211226W WO9313343A1 WO 1993013343 A1 WO1993013343 A1 WO 1993013343A1 US 9211226 W US9211226 W US 9211226W WO 9313343 A1 WO9313343 A1 WO 9313343A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing means
conical surface
coupling member
pressure
coupling members
Prior art date
Application number
PCT/US1992/011226
Other languages
English (en)
Inventor
Kevin P. Moran
Robert J. Catterfeld
Original Assignee
Pall Corporation
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 Pall Corporation filed Critical Pall Corporation
Priority to JP5511911A priority Critical patent/JPH06505788A/ja
Publication of WO1993013343A1 publication Critical patent/WO1993013343A1/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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/006—Screw-threaded joints; Forms of screw-threads for such joints with straight threads
    • F16L15/008—Screw-threaded joints; Forms of screw-threads for such joints with straight threads with sealing rings

Definitions

  • the present invention relates to sealing means for pressure carrying ele ⁇ ments, and pressure connection means employing such sealing means.
  • the invention also relates to an application of the pressure connection means for the filtration of a fluid under low, medium, or high pressure in a filter system.
  • O-rings of elastomeric material as fluid sealing means bet ⁇ ween two coupled components is well known in the art.
  • the O-ring is normally placed in a groove or channel on the central element of the two elements to be joined. Due to machining tolerances, a small clear- ance gap exists between the members to be coupled. Under pressure the O-ring is deformed and partially leaves the O-ring channel and enters into the clearance or extrusion gap. This effect referred to as extrusion can lead to O-ring failure, for example in the form of peeling or nib ⁇ bling of the O-ring surface.
  • One method of avoiding failure is to provide an additional backup ring of higher hardness; which prevents the O-ring from entering into the extrusion gap.
  • An object of the present invention is to provide a sealing means by which a clearance gap on the down ⁇ stream side " of the O-ring is substantially eliminated.
  • a further object is to provide pressure connection means employing the sealing means, by which a minimal number of connection elements is necessary.
  • a further object of the invention is to provide a low, medium, or high pressure fluid filtration system making use of the pressure connection means.
  • sealing means for pressure carrying coupling members are provided as defined in the claims.
  • a first conical surface is arranged on one coupling member about a central axis there ⁇ of.
  • the second coupling member has arranged thereon a second conical surface, which is brought into partial contact with the first surface.
  • the cone angles of the surfaces measured from the central axis is such that the angle of the second surface is slightly larger, preferably 1 to 10° larger, most preferably about 5° larger, than the angle of the first surfa ⁇ ce.
  • the contact area of the two coupling members is formed in an annular region about the central axis. With this arrangement, no gap arises between the two coupling elements, which are in direct material contact.
  • the sealing means preferably also comprise an O-ring contacting the two coupling members, " where the contact area is displaced upstream from the high pressure side of the annular contact region of the two conical surfaces.
  • connection means are also provided in accordance with the invention as defined in the claims.
  • the connection means comprise first and second coupling members each having interior chambers to provide a fluid passageway.
  • the first coupling member has an outer threaded portion which engages with an inner threaded portion of the second coupling member in the connected condition.
  • the threaded portions are preferably arranged on the coupling members axially displaced from the first and second conical surfaces such that contact is urged between the conical surfaces to form a tight material contact.
  • the connection means has the advantage of comprising only two pieces joined by a screw connection.
  • Preferably the threaded portions are located on the dry side of the seal which reduces the chance of possible contamination when the connection is assembled or disassembled.
  • Another advantage of the claimed sealing means and connection means is that with the conical surface contact seal, the tolerances in machining the two coupling members can be less severe. The cost of manufacturing the coupling elements can therefore be held down.
  • FIG 1 shows an embodiment of the sealing means in accordance with the present invention.
  • Figure 2 shows an embodiment of the pressure connection means of the present invention, where one coupling member is a filter bowl.
  • FIG. 1 shows an embodiment where a portion of the first coupling member 10 with a central axis 20, is arranged coaxially within a portion of the second coupling member 11.
  • the first coupling member 10 has a conical or frustoco ⁇ ical surface 6, which extends about the central axis 20.
  • a second conical or frustoconical surface 9 is arranged on the second coupling member 11 and is in partial contact with the first surface 6. As can be seen in Figure 1, the cone angle of the second conical surface 9 with respect to the axis 20 is larger than the corresponding angle of the first conical surface 6.
  • the surfaces 6, 9 contact each other in a region 13 which extends annularly about the central axis 20.
  • the radial extent of the contact region 13 will be less than the radial extent of either of the two conical surfaces.
  • the radial distance of contact on the surfaces will also depend on the difference in cone angles of the two surfaces. In other words the smaller the difference, the larger the radial dimension of the annular contact region.
  • the cone angle of the first conical surface with respect to the axis 20 is preferably in the range of 3 and 45° and more preferably in the range of 15 to 20°.
  • the angle of the second conical surface is nominally 1 to 10° greater than the cone angle of the first surface, preferably about 5° greater.
  • the two coupling members when engaged with one another form a material contact. Due to the arran ⁇ gement of tapered contact surfaces, the tolerances of machining the two coupling members, e.g. their diameters, can be relaxed or at least need not be so stringent. A clearance gap or tolerance gap is eliminated in the contact region.
  • an O-ring in contact with the first and second coupling members is provided with a contact area displaced upstream of the high pressure side of the annular contact region.
  • the high pressure side is indicated at (a) and the low pressure side at (b).
  • the contact area of the O-ring 2 with the second coupling member 11 is preferably immediately adjacent to the annular contact region 13 of the two conical surfaces. In this manner, there is essentially no extrusion gap or clearance gap downstream of the O-ring 2.
  • the O- ring 2 is preferably arranged in an annular channel 3 in an outer sur ⁇ face of the first coupling member 10.
  • the channel 3 is preferably dis ⁇ placed adjacent in axial direction to the inside edge of the first conical surface 6.
  • the first coupling member 4 of this embodiment comprises an interior chamber 14, and the second coupling member 7 comprises an interior chamber 17.
  • the two chambers communicate to form ' a fluid passageway.
  • the first member 4 also comprises an outer threaded portion 5 which engages with an inner threaded portion 8 of the second coupling member 7.
  • the threaded portions 5, 8 are arranged on the coupling members axially displaced from the first and second conical surfaces of the sealing means 1 such that contact between the two surfaces is urged when screwed together.
  • the two parts will materially butt each other and remain in contact during service when the correct torque has been applied and is maintained.
  • the threaded portions 5, 8 of the coupling members 4, 7 are arranged downstream or on the low pressure side of the sealing means 1. This corresponds to the low pressure side (b) of Figure 1. The threads are therefore not exposed to the pressur ⁇ ized medium passing the internal chambers 14 and 17.
  • the embodiment shown in Figure 2 illustrates the use of the pressure connection means in a high pressure fluid filtration system.
  • the first coupling member 4 comprises a filter bowl into which a filter element (not shown) can be provided in the chamber 14.
  • the second coupling member 7 is a filter head which supplies the fluid to be filtered via the chamber 17.
  • the pressure connection means are particularly useful in this fluid filtration system.
  • the means comprise only two parts to be screw connec ⁇ ted.
  • the tolerances of the components as mentioned above need not be severe.
  • the O-ring channel 3 can also be machined using normal tolerances.
  • the ' filter bowl and filter head material will normally be carbon steel, ductile iron castings or stainless steel.
  • FIG. 1 Integrity tests in the form of fatigue tests have been made for the embodiment of the pressure connection means shown in Figure 2.
  • the embodiments shown in Figures 1 and 2 also illustrate the use of the sealing means 1 with coupling members fashioned from a polymeric or plastic material, such as polypropylene, poly-[tetrafluoroethylene/ perfluoro(alkylvinyl ether)] (PFA), or polyvinylidene difluoride (PVDF).
  • PFA poly-[tetrafluoroethylene/ perfluoro(alkylvinyl ether)]
  • PVDF polyvinylidene difluoride
  • the sealing means with plastic coupling members may be used in low, medium, or high pressure fluid systems.
  • fluid filtration systems with plastic coupling members such as plastic filter housings or plastic adapters for filter cartridges.

Landscapes

  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Gasket Seals (AREA)
  • Joints With Pressure Members (AREA)
  • External Artificial Organs (AREA)
  • Filtration Of Liquid (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Press Drives And Press Lines (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Un moyen d'étanchéité et un élément de raccordement pour fluide sous pression sont prévus pour des éléments d'accouplement subissant une pression (10, 11). Des premier et second éléments d'accouplement (10, 11) comportent chacun une surface conique (6, 9), l'angle d'inclinaison de chaque surface étant légèrement différent. Lorsque les éléments sont assemblés, les surfaces coniques présentant des angles différents entrent partiellement en contact, l'une avec l'autre, pour produire une étanchéité par contact direct. L'élément de raccordement convient particulièrement à un système de filtration de fluide.
PCT/US1992/011226 1991-12-24 1992-12-24 Moyen d'etancheite pour elements subissant une pression WO1993013343A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5511911A JPH06505788A (ja) 1991-12-24 1992-12-24 圧力支持要素用密封装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9127405.0 1991-12-24
GB9127405A GB2262788A (en) 1991-12-24 1991-12-24 Threaded correction with differential taper sealing

Publications (1)

Publication Number Publication Date
WO1993013343A1 true WO1993013343A1 (fr) 1993-07-08

Family

ID=10706835

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/011226 WO1993013343A1 (fr) 1991-12-24 1992-12-24 Moyen d'etancheite pour elements subissant une pression

Country Status (12)

Country Link
JP (2) JPH05240357A (fr)
AU (2) AU3034992A (fr)
BE (1) BE1006225A3 (fr)
CA (2) CA2085968A1 (fr)
DE (1) DE4242290A1 (fr)
ES (1) ES2065245B1 (fr)
FR (1) FR2685424A1 (fr)
GB (1) GB2262788A (fr)
IT (1) IT1258127B (fr)
NL (1) NL9202219A (fr)
SE (1) SE9203887L (fr)
WO (1) WO1993013343A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19506479A1 (de) * 1995-02-24 1996-08-29 Suspa Compart Ag Mit Fluid gefüllte Zylinder-Kolbenstangen-Einheit, insbesondere Gasfeder
DE19516994C1 (de) * 1995-05-09 1996-10-17 Siemens Ag Flüssigkeitsringmaschine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277292B (en) * 1993-04-20 1997-10-08 Glasdon Ltd Improvements in or relating to moulding techniques
DE19707600A1 (de) * 1997-02-26 1998-08-27 Knecht Filterwerke Gmbh Deckel für ein Filtergehäuse
EP0930452A1 (fr) 1998-01-16 1999-07-21 Daiso Corporation Joint d'étanchéité
ITTO20040898A1 (it) * 2004-12-23 2005-03-23 Paolo Ramoino Struttura di giunto per tubazioni percorse da fluidi, guarnizioni e metodo di realizzazione relativi
DE102013222594A1 (de) 2013-03-12 2014-09-18 Robert Bosch Gmbh Spezielle Dichtungsgeometrie bei Abgassensoren zur Erzeugung einer hohen Dichtigkeit
EP4293233A1 (fr) * 2023-10-18 2023-12-20 Pfeiffer Vacuum Technology AG Appareil à vide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443187A (en) * 1944-08-15 1948-06-15 James C Hobbs Pipe coupling
US3150889A (en) * 1960-10-11 1964-09-29 Gray Tool Co Coupling with rigidly fixed sealing ring
US3758072A (en) * 1971-02-16 1973-09-11 Rockwell Mfg Co Sealing arrangement
US4192519A (en) * 1978-07-24 1980-03-11 Buggele Alvin E High pressure multi-purpose seal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140115A (en) * 1983-04-25 1984-11-21 Imi Components Limited Conduit coupling-electrical continuity
EP0127560B1 (fr) * 1983-04-29 1990-01-03 Baker Hughes Incorporated Accouplement vissé comprenant une garniture d'étanchéité unilatérale
US4521042A (en) * 1983-07-05 1985-06-04 Hydril Company Threaded connection
US4736967A (en) * 1986-12-04 1988-04-12 The Hydril Company Tubular pin configuration to prevent galling while ensuring sealing
DE68902999T2 (de) * 1988-01-27 1993-03-04 Nwd Int Inc Hydraulik-kupplung.
US5110160A (en) * 1990-08-23 1992-05-05 Fluid Line Products, Inc. High pressure port fitting system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443187A (en) * 1944-08-15 1948-06-15 James C Hobbs Pipe coupling
US3150889A (en) * 1960-10-11 1964-09-29 Gray Tool Co Coupling with rigidly fixed sealing ring
US3758072A (en) * 1971-02-16 1973-09-11 Rockwell Mfg Co Sealing arrangement
US4192519A (en) * 1978-07-24 1980-03-11 Buggele Alvin E High pressure multi-purpose seal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19506479A1 (de) * 1995-02-24 1996-08-29 Suspa Compart Ag Mit Fluid gefüllte Zylinder-Kolbenstangen-Einheit, insbesondere Gasfeder
DE19516994C1 (de) * 1995-05-09 1996-10-17 Siemens Ag Flüssigkeitsringmaschine

Also Published As

Publication number Publication date
ITTO921036A0 (it) 1992-12-23
ES2065245A2 (es) 1995-02-01
DE4242290A1 (fr) 1993-07-01
JPH06505788A (ja) 1994-06-30
CA2104690A1 (fr) 1993-06-25
ITTO921036A1 (it) 1994-06-23
SE9203887L (sv) 1993-06-25
AU3034992A (en) 1993-07-01
SE9203887D0 (sv) 1992-12-22
ES2065245B1 (es) 1997-03-01
CA2085968A1 (fr) 1993-06-25
NL9202219A (nl) 1993-07-16
ES2065245R (fr) 1996-07-16
GB2262788A (en) 1993-06-30
JPH05240357A (ja) 1993-09-17
FR2685424A1 (fr) 1993-06-25
GB9127405D0 (en) 1992-02-19
AU3422693A (en) 1993-07-28
BE1006225A3 (fr) 1994-06-14
IT1258127B (it) 1996-02-20

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