WO1996004498A1 - Robinet a boisseau spherique - Google Patents

Robinet a boisseau spherique Download PDF

Info

Publication number
WO1996004498A1
WO1996004498A1 PCT/EP1995/002785 EP9502785W WO9604498A1 WO 1996004498 A1 WO1996004498 A1 WO 1996004498A1 EP 9502785 W EP9502785 W EP 9502785W WO 9604498 A1 WO9604498 A1 WO 9604498A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
housing
ball
ball valve
sealing rings
Prior art date
Application number
PCT/EP1995/002785
Other languages
German (de)
English (en)
Inventor
Egon KOHLSTÄDT
Günter ROMMEL
Original Assignee
ASV STüBBE GMBH & 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 ASV STüBBE GMBH & CO. KG filed Critical ASV STüBBE GMBH & CO. KG
Publication of WO1996004498A1 publication Critical patent/WO1996004498A1/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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/204—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs

Definitions

  • the invention relates to a ball valve having a housing which has at least one inlet and at least one outlet, a ball plug which is arranged in the housing and which has at least one through-channel, the openings of which are assigned to the inlets and outlets of the housing, and with housing-fixed , the inlets and outlets of the housing surrounding sealing rings, each of which rests on the ball plug with at least one sealing edge.
  • Sealing rings fixed to the housing can be found, in particular, in ball valves whose housing is injection-molded around the ball valve and the sealing rings as a one-piece injection-molded part.
  • cores are inserted into the through-channel of the ball plug in such a way that they protrude from its openings. Then the sealing rings are placed on the cores. This is then overmoulded, with the protruding ends of the cores defining the inlet and outlet of the housing thus created.
  • the invention is therefore based on the object of extending the life of the ball valve mentioned at the beginning.
  • the ball valve according to the invention is characterized in that at least one of the openings of the ball plug is surrounded by at least one recess which receives the associated sealing edge of the associated sealing ring in the associated open position of the ball plug.
  • the invention is based on the knowledge that the essential wear of the sealing rings is based on Material fatigue, which is caused by the fact that the sealing rings are constantly under maximum prestress, as is required in order to produce the desired sealing effect in the closed position.
  • This pre-tension is generated during the encapsulation of the housing during the manufacturing process, by pressing the sealing rings accordingly before and during the encapsulation. After cooling, the sealing rings are firmly anchored in the housing while maintaining this preload.
  • the sealing rings are pressed against the ball plug during the extrusion coating with a substantially reduced pretension, their sealing edges engaging in the associated depressions. These are inevitably opposite the sealing rings, since the injection molding takes place in the open position of the ball plug.
  • the sealing edges of the sealing rings lie in the associated depressions. Since no sealing effect is required in this position, the contact pressure can be reduced to zero. Only in the closed position do the sealing rings come into contact with the spherical surface of the ball plug. Since this spherical surface is naturally radially further outwards than the depressions, the sealing rings come under their full contact pressure required for the sealing effect. This is then released again in the open position, which leads to a corresponding relief of the sealing rings. This results in a considerable increase in the service life of the sealing rings and thus also the service life of the valve, since the sealing rings cannot be replaced.
  • the measure according to the invention can also be used if the contact pressure is to be increased in the closed position without the contact pressure being to experience a corresponding increase during manufacture.
  • the ball plug In the case of two-way valves, the ball plug generally has a diametrical through-channel, to which a corresponding inlet and a corresponding outlet of the housing are assigned. There are different constellations for multi-way valves.
  • a single sealing ring can be assigned to each inlet or outlet of the housing. There is also the possibility of assigning several sealing rings. Each of the sealing rings can have one or more sealing edges. The number of depressions is obtained accordingly if each sealing edge of each sealing ring is to be assigned a depression. Under certain circumstances, however, it may be sufficient to apply the invention only to a single sealing ring with a single sealing edge.
  • the recess merges into the spherical outer surface of the ball plug.
  • the rounding is designed in such a way that the switching operations can be carried out gently while protecting the sealing edge.
  • the recess can adjoin the spherical outer surface of the ball plug on both sides. Even more gentle on the sealing edge is a construction in which the depression is designed as a rounding off of the edge of the associated opening.
  • Figure 1 is a schematic section through a ball plug with attached sealing rings.
  • FIG. 2 on an enlarged scale a part of Fig. 1;
  • FIG. 3 shows the ball plug in a different switching position.
  • FIG. 4 shows a modified embodiment in a representation corresponding to FIG. 2;
  • FIG. 5 shows the embodiment according to FIG. 4 in a representation corresponding to FIG. 3;
  • Fig. 6 shows the circled detail from Fig. 4 on an enlarged scale.
  • a ball plug 1 which has a through channel 2. Sealing rings 3 and 4 rest on the ball plug 1 on both sides of the through-channel 2. The sealing ring 3 is held by two support rings 5, while two support rings 6 are provided for the sealing ring 4.
  • the housing is extrusion-coated, but only after cores (not shown) have been inserted into the through-channel of the ball plug.
  • the support rings 5 and 6 connect in one piece to the housing, the interior of the support rings 5 defining an inlet 7 and the interior of the support rings 6 defining an outlet 8.
  • the respectively assigned openings of the through-channel have the reference numbers 9 and 10.
  • FIG. 2 shows the opening 10 of the through-channel 2 in which the sealing ring 4 engages with its sealing edge 12.
  • FIG. 2 like FIG. 1, shows the open position of the ball plug 1, in which the encapsulation of the housing takes place. If the ball plug 1 assumes the open position during operation, at most a slight sealing effect is required. The sealing ring 4 can therefore engage in the recess 11 largely without pre-tensioning.
  • the sealing edge 12 of the sealing ring 4 is pressed onto the spherical surface of the ball plug lying further radially outwards.
  • the contact pressure is correspondingly greater, namely as large as the desired sealing effect requires.
  • the depression 11 coincides with the opening 10, i.e. it is designed as a rounding off the edge thereof.
  • the sealing ring 4 has two sealing edges 12 and 12 ', the first of which cooperates with the recess 11 in the open position of the ball plug 1 according to FIGS. 4 and 6. 5, both sealing edges lie on the spherical outer surface of the ball plug 1, the contact pressure of the sealing edge 12 having increased drastically compared to the open position.
  • the sealing edge 12 'of the sealing ring 4 according to FIGS. 4 and 5 can be assigned a separate depression, specifically in the form of a rounded groove, as shown in FIG. 2.
  • sealing rings are conceivable, which interact with two channel-shaped depressions according to FIG. 2. Comparable conditions can exist when several concentric sealing rings are arranged. From Fig. 1 it can be seen that both sealing rings cooperate with depressions. If necessary, it is sufficient to apply this feature to only one of the sealing rings.
  • the invention is not limited to the two-way valve shown, but can generally be used where there are sealing rings fixed to the housing and a correspondingly predetermined preload is worked. These conditions are found primarily in molded housings.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

Un robinet à boisseau sphérique comprend un corps dont l'orifice d'admission et l'orifice de sortie (8) sont entourés chacun par une bague d'étanchéité (4) qui s'appuie sur le boisseau (1). Lorsque le canal d'écoulement (2) du boisseau est aligné avec l'orifice d'admission et l'orifice de sortie du corps, les bords d'étanchéité (12) des bagues d'étanchéité pénètrent chacun dans une dépression (11) qui entoure l'ouverture correspondante (10) du canal d'écoulement du boisseau. Les bagues d'étanchéité ne sont ainsi pas sollicitées lorsque le robinet à boisseau sphérique est ouvert, ce qui contribue à augmenter leur durabilité.
PCT/EP1995/002785 1994-08-04 1995-07-15 Robinet a boisseau spherique WO1996004498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG9412561.9U 1994-08-04
DE9412561 1994-08-04

Publications (1)

Publication Number Publication Date
WO1996004498A1 true WO1996004498A1 (fr) 1996-02-15

Family

ID=6911984

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/002785 WO1996004498A1 (fr) 1994-08-04 1995-07-15 Robinet a boisseau spherique

Country Status (1)

Country Link
WO (1) WO1996004498A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807692A (en) * 1972-05-01 1974-04-30 Dynatech Corp Valve, method of manufacture of valve and valve made by such method
US3907959A (en) * 1971-02-17 1975-09-23 Sloane Mfg Co R & G Method of molding a value with rotatable member
FR2316505A1 (fr) * 1975-07-03 1977-01-28 Itt Vanne a boisseau non spherique
US4180542A (en) * 1973-09-04 1979-12-25 Celanese Corporation Methods for making molded plug and plug valve
EP0111910A2 (fr) * 1982-12-16 1984-06-27 Sekisui Kagaku Kogyo Kabushiki Kaisha Robinet à tournant sphérique et procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3907959A (en) * 1971-02-17 1975-09-23 Sloane Mfg Co R & G Method of molding a value with rotatable member
US3807692A (en) * 1972-05-01 1974-04-30 Dynatech Corp Valve, method of manufacture of valve and valve made by such method
US4180542A (en) * 1973-09-04 1979-12-25 Celanese Corporation Methods for making molded plug and plug valve
FR2316505A1 (fr) * 1975-07-03 1977-01-28 Itt Vanne a boisseau non spherique
EP0111910A2 (fr) * 1982-12-16 1984-06-27 Sekisui Kagaku Kogyo Kabushiki Kaisha Robinet à tournant sphérique et procédé de fabrication

Similar Documents

Publication Publication Date Title
DE69813858T2 (de) Niedrigdruck-magnetventil
DE2357671C2 (de) Durchflußbegrenzungsventil
EP0922888B1 (fr) Anneau d'étanchéité
DE69215379T2 (de) Flachdichtung insbesondere fuer diesel- und ottomotoren
DE69930406T2 (de) Filter mit filterpatrone und dichtungsanordnung
DE102013103606B4 (de) Fluidisches Steuerelement
DE102005003982B4 (de) Pneumatisches Wegeventil mit einem Ventilschieber
DE19818334A1 (de) Sicherheitsventil für eine Filtervorrichtung und ein Verfahren zur Befestigung desselben
WO2009021605A1 (fr) Soupape de retenue, en particulier pour applications médicales
DE3833117A1 (de) Ventildichtung
DE2110065A1 (de) Ventil und Verfahren zu dessen Herstellung
DE3209572A1 (de) Sphaerisches schraeglager
EP0358899B1 (fr) Soupape de retenue avec dispositif d'etranglement
DE2139135A1 (de) Ventilanordnung
DE19503445A1 (de) Hydraulisch dämpfendes Lager
WO1994002762A1 (fr) Bague d'etancheite et son utilisation
DE3204112A1 (de) Servo-schieberventil
WO1996004498A1 (fr) Robinet a boisseau spherique
DE2546805C3 (de) Dichtring für drehbare Körper, wie Wellen o.dgl.
WO2002010626A1 (fr) Piston de soupape pour soupapes a voies multiples
AT390313B (de) Kolbenschieberventil
DE102021122619A1 (de) Filterpatrone
EP1050695A2 (fr) Ressort
EP0848964A1 (fr) Soupape anti-retour pour utilisation médicale
DE10260252A1 (de) Ventil

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase