EP2823204A1 - Soupape haute pression et son joint de siège - Google Patents

Soupape haute pression et son joint de siège

Info

Publication number
EP2823204A1
EP2823204A1 EP12809105.5A EP12809105A EP2823204A1 EP 2823204 A1 EP2823204 A1 EP 2823204A1 EP 12809105 A EP12809105 A EP 12809105A EP 2823204 A1 EP2823204 A1 EP 2823204A1
Authority
EP
European Patent Office
Prior art keywords
seat seal
pressure
shut
pressure valve
seal
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Withdrawn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
EP12809105.5A
Other languages
German (de)
English (en)
Inventor
Matthias Wangemann
Andreas MÜLLER
Michaela Vogt
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.)
Holter Regelarmaturen GmbH and Co KG
Original Assignee
Holter Regelarmaturen GmbH and Co KG
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 Holter Regelarmaturen GmbH and Co KG filed Critical Holter Regelarmaturen GmbH and Co KG
Publication of EP2823204A1 publication Critical patent/EP2823204A1/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Withdrawn legal-status Critical Current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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/243—Packings
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/246—Combination of a sliding valve and a lift valve

Definitions

  • the invention relates to a high pressure valve according to the preamble of claim 1 and a seat seal for this purpose.
  • Corresponding valves as known, for example, from DE 37 31 349, have a high-pressure region, a low-pressure region and a piston-shaped shut-off element arranged in a piston housing between the high-pressure region and the low-pressure region.
  • the end position of this shut-off must be sealed due to the high pressure difference so that the valve safely separates the high pressure from the low pressure area.
  • a seat seal is provided in an annular recess surrounding the piston in the piston housing.
  • These seat seals are usually designed as self-sealing seals. In this case, use is made of the applied pressure on one side, through which the seat seal is pressed radially against a support region of the shutoff of the piston.
  • the invention is therefore an object of the invention to provide a high-pressure valve of the type mentioned and a seat seal, in which the described problems are avoided and which are characterized in particular by a simplified structure with few components.
  • the high-pressure valve according to the invention is characterized in that the seat seal, which is preferably made of a plastic, such as PTFE, introduced into a recess in the valve seat, acts on its seat, in particular forms special piston-shaped, shut-off side facing away together with a part of the inner wall of the recess, in particular a wedge-shaped in cross-section, annular gap.
  • the seat seal which is preferably made of a plastic, such as PTFE, introduced into a recess in the valve seat, acts on its seat, in particular forms special piston-shaped, shut-off side facing away together with a part of the inner wall of the recess, in particular a wedge-shaped in cross-section, annular gap.
  • This annular gap serves to surround the seat seal, in particular as an O-ring made of plastic, eg NBR, EPDM or FKM), flexible element on reaching the closed position of the shut-off by the applied pressure on the high pressure side in the direction of the annular gap and in this is pressed into it. As a result, the abutment portion of the seat seal is pressed against the shut-off element, which causes the sealing effect. This is how the system seals itself. It is preferably provided that the annular gap has a wedge-shaped cross-section.
  • the flexible element is pressed by the pressure in the wedge-shaped recess and thus provides a spreading effect of the "wedge", so that the seat seal must move away from the inner wall of the depression in pressure towards the flexible element in the direction of the shut-off and therefore the pressure reinforced at this.
  • the seat seal is designed such that it itself or / and between the seat seal and the inner wall of the recess has or forms a fluid-permeable flow path from the high-pressure side to the low-pressure side.
  • This flow path is arranged so that it by pressing in the flexible described above
  • the seat seal has at least one flow channel extending between the flexible element and the shut-off element. This can be formed in particular by a hole in the seat seal.
  • the flow path can also be formed by an annular gap.
  • the seat seal consists of two parts.
  • the seat seal is formed from two annular sections adjacent to each other with joining surfaces, so that an annular gap-shaped flow channel is created between the joining surfaces.
  • the seat seal of the high-pressure valve preferably comprises at least one sealing ring with an approximately L- or T-shaped cross section.
  • the seat seal may be formed in the two-part variant of two sealing rings with approximately L-shaped cross-section.
  • the invention further relates to a seat seal for a high-pressure valve, which is annularly formed from one or two annular parts and has a protruding on the ring inside abutment projection and provided on the ring outer side opposite to the Investment projection in the axial direction widened section, characterized in that the seat seal in cross-section approximately L- or T-shaped from ⁇ is formed.
  • a seat seal for a high-pressure valve which is annularly formed from one or two annular parts and has a protruding on the ring inside abutment projection and provided on the ring outer side opposite to the Investment projection in the axial direction widened section, characterized in that the seat seal in cross-section approximately L- or T-shaped from ⁇ is formed.
  • a flow-through opening leading through the widened section and the contact section is provided in order to reduce the pressure during opening in a controlled manner by a flow to the low-pressure side.
  • the at least one flow-through opening can be designed in the form of a gap or a bore. It when the widened portion has a radially outer boundary surface, which does not extend exclusively parallel to the axial direction of the seat seal is particularly advantageous.
  • the annular gap described above between recess inner wall can be tapered, which simplifies the impressions of the flexible element and the spreading of the annular gap and improves the self-sealing effect.
  • FIG. 1 shows a high-pressure valve according to the invention.
  • FIG. 2 shows a detail enlargement of the high-pressure valve with a seat seal according to a first embodiment.
  • FIG. 3 shows a section enlargement of the high-pressure valve with a seat seal according to a second embodiment.
  • FIG. 4 shows a detail enlargement of the high-pressure valve with a seat seal according to a third embodiment.
  • FIG. 5 shows an enlarged detail of the high-pressure valve with a seat seal according to a fourth embodiment.
  • FIG. 6 shows a detail enlargement of the high-pressure valve according to the invention with a seat seal according to the invention in the region of the annular gap.
  • the valve 1 has a high-pressure side 2 with a pressure p 1 applied there and a low-pressure side 3 with a pressure p 2 prevailing there, wherein p 1> p 2 holds in the closed position.
  • the valve 1 has a piston-shaped shut-off element 4, which is displaceably mounted in the axial direction Z for opening and closing the valve 1 in a particularly cylindrical housing 5.
  • the fluid gas or liquid
  • R denotes the radial direction, wherein radially outward is indicated by the arrow direction.
  • FIG. 2 shows a first embodiment according to the invention.
  • an annular recess 8 in the example shown approximately in cross-section T-shaped seat seal 10 is inserted. This has a contact portion lOd, with which they sealingly in the closed state of the valve (when the piston-shaped shut-off element 4 is in the closed position) with the outer surface 4a of the shutoff 4 abuts.
  • the seat seal 10 has on its askten the contact portion lOd on the opposite to the contact portion lOd widened portion 10b, one of the inner wall 8a (see Fig. 6) of the recess 8 facing outer surface 10c.
  • an annular gap 11 is formed between the seat seal 10 and the inner wall 8a of the recess.
  • the outer surface 10c and the inner wall 8a are formed so that they form an approximately wedge-shaped annular gap between them.
  • the seat seal 10 is, as also shown in FIG. 6, surrounded by a preferably O-ring-shaped flexible element 9, which likewise extends in the recess 8 between the outer surface 10c and the inner wall 8a of the recess 8 is located.
  • the flexible element can be deformed under pressure. In the closed state, the pressure pl (> p2) ensures that the flexible element 9 is pressed into the annular gap 11.
  • the seat seal 10, in particular made of plastic is slightly deformed and pressed in particular in the radial direction inwards (toward the center axis of the shut-off element 4) with its abutment portion 10d against the outer surface 4a of the shut-off element 4. Consequently, under the pressure p, the system seals itself.
  • the pressure pl causes the flexible element 9 to be pressed into the annular gap 11 and spreads apart the seat seal 10 and inner wall 8a. This effect is particularly strong when the annular gap is wedge-shaped, in particular tapering in the axial direction, is formed, as shown in particular in Figure 6.
  • FIGS. 3 to 5 also work with regard to the pressure-sealing effect, so that a repeated description of this effect is unnecessary. In the following, therefore, only additional features of the following exemplary embodiments will be discussed, which are essentially the result of the somewhat different seal geometry compared to FIG.
  • the outer surface 4a thereof tapers conically, as indicated at 4b.
  • the shut-off element 4 moves in the direction Z and the conical end section 4b reaches the region in which the seat seal 10 abuts against its contact section 10d the outer surface 4a of the shut-off element is pressed. If the cone 4b lies at the axial height of the seat seal 10, the contact pressure of the seat seal 10 against the shut-off element 4 is reduced, since the abutment formed by the shut-off element 4 moves farther away from the seat seal 10. Due to the pressure PI, which acts on the flexible element 9 and thus also on the seat seal 10, the seat seal 10 tends to be pushed out of the recess 8. The flexible element 9 is displaced in the direction of -Z relative to the seat seal 10 by the pressure PI in the axial direction in the drawing.
  • FIGS. 3 to 5 This shift is utilized in the exemplary embodiments of FIGS. 3 to 5.
  • a seat opening completely penetrating through opening 10a is shown in the examples shown. This is realized in DE-T-shaped example of Figure 3 and the L-shaped seat seal variant of Figure 5 as a through hole 10a. It can also be provided a plurality of holes 10a preferably.
  • a two-part seat seal from two in cross-section approximately L-shaped sealing rings 10.1, 10.2 is shown. Between see the joining surfaces of the two sealing rings creates a circumferential annular gap, which is fluid-permeable.
  • Both through holes 10a and through the annular gap 10a provided through opening 10a is exposed when acted upon by the pressure PI on the high-pressure side by the flexible element 9 is displaced in the direction -Z and on the back 10c (see Fig. 6) of the seat seal from the recess 8 accessible through opening 10a thereby releases.
  • the self-sealing of the seat seal (as described above) still acts (in the lower part of the seat seal), as long as the valve is not opened.
  • the portion 4b thereof arrives in the shut-off-side opening portion (in the abutting portion 10d) of the through-hole 10a, a flow path between the high-pressure side 2 and the low-pressure side 3 of the valve is opened and the pressure can be released through the through-hole 10a , so that he no longer acts on the seat seal 10 when opening and this unintentionally pushes out of the recess 8 or destroyed the seat seal 10.

Landscapes

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

Abstract

L'invention concerne une soupape haute pression (1) qui présente, entre une zone à haute pression (2) et une zone à basse pression (3), un élément d'obturation (4) pouvant être déplacé entre une position de fermeture et une position d'ouverture. Pour faire l'étanchéité dans la position de fermeture, ladite soupape comporte un joint de siège qui est radialement plaqué contre l'élément d'obturation et qui est situé dans une cavité de la paroi intérieure du corps de soupape haute pression et qui vient de se plaquer, dans la position de fermeture, contre l'élément d'obturation. Le joint de siège est entouré d'un élément souple qui est placé dans la même cavité, ladite cavité présentant dans sa zone adjacente à l'élément d'obturation une zone amincie laquelle permet à une partie de contact du joint de siège de se plaquer radialement contre l'élément d'obturation alors que la partie élargie dudit joint permet de le maintenir dans la cavité. Sur son côté opposé à l'élément d'obturation, ledit joint forme ensemble avec la paroi intérieure une fente annulaire laquelle a notamment le profil d'un coin et dans laquelle ledit élément souple est poussé sous l'effet de la pression régnant sur le côté haute pression lorsqu'on atteint la position de fermeture. Ainsi, la partie de contact du joint de siège est pressée contre l'élément d'obturation.
EP12809105.5A 2012-11-30 2012-11-30 Soupape haute pression et son joint de siège Withdrawn EP2823204A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/004950 WO2014082649A1 (fr) 2012-11-30 2012-11-30 Soupape haute pression et son joint de siège

Publications (1)

Publication Number Publication Date
EP2823204A1 true EP2823204A1 (fr) 2015-01-14

Family

ID=47471674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12809105.5A Withdrawn EP2823204A1 (fr) 2012-11-30 2012-11-30 Soupape haute pression et son joint de siège

Country Status (2)

Country Link
EP (1) EP2823204A1 (fr)
WO (1) WO2014082649A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3072557A1 (fr) 2017-08-09 2019-02-14 Mainspring Energy, Inc. Ensembles bagues d'etancheite configures pour un verrouillage sous pression
IT202000021820A1 (it) * 2020-09-16 2022-03-16 BRAVO Eleonora Valvola di intercettazione di fluidi

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418399A1 (fr) * 1978-02-22 1979-09-21 Levardon Raymond Joint d'etancheite pour fluides, a equilibrage hydrostatique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL138981B (nl) * 1967-09-25 1973-05-15 Mokveld Nv Maschf Afsluiter.
US4192484A (en) * 1978-11-13 1980-03-11 Domer Scaramucci High pressure disc valve
CH667705A5 (de) * 1985-11-14 1988-10-31 Sistag Dichtungsvorrichtung.
DE3731349A1 (de) 1987-09-18 1989-03-30 Mokveld Valves Bv Ventil aus einem gehaeuse mit einem zylindrischen stroemungsdurchgang
DE10312753A1 (de) 2003-03-21 2004-10-07 Mokveld Valves B.V. Ringspaltdichtung für ein Ventil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418399A1 (fr) * 1978-02-22 1979-09-21 Levardon Raymond Joint d'etancheite pour fluides, a equilibrage hydrostatique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014082649A1 *

Also Published As

Publication number Publication date
WO2014082649A1 (fr) 2014-06-05

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