FR2518212A1 - Seal for spherical gas valve - has elastomer body and gives double inner sealing to increase safety - Google Patents

Seal for spherical gas valve - has elastomer body and gives double inner sealing to increase safety Download PDF

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Publication number
FR2518212A1
FR2518212A1 FR8123480A FR8123480A FR2518212A1 FR 2518212 A1 FR2518212 A1 FR 2518212A1 FR 8123480 A FR8123480 A FR 8123480A FR 8123480 A FR8123480 A FR 8123480A FR 2518212 A1 FR2518212 A1 FR 2518212A1
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FR
France
Prior art keywords
seal
increase safety
inner sealing
gas valve
contact
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.)
Granted
Application number
FR8123480A
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French (fr)
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FR2518212B1 (en
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR8123480A priority Critical patent/FR2518212A1/en
Publication of FR2518212A1 publication Critical patent/FR2518212A1/en
Application granted granted Critical
Publication of FR2518212B1 publication Critical patent/FR2518212B1/fr
Granted legal-status Critical Current

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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
    • F16K5/06—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 with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0673—Composite packings

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

Abstract

The gas valve has an inner seal formed by a reinforced joint (1,4,5). This gives double inner sealing by contact with the rotating spherical valve ball (2) and the housing (3). The contact surface with the rotating ball forms an angle of 17 degrees with its centre. The joint (1) is of plastics and is held and guided by a washer (5) and ring (4), both of brass. These, under spring (6) action, give some volume variation without impairing the sealing function. The valve is for gas at 0.2 to 4 bars pressure.

Description

La présente invention concerne le dispositif d'étanchéité intérieure d'un robinet à tournant sphérique. The present invention relates to the internal sealing device of a ball valve.

Dans les dispositifs connus de ce genre, ltétanchéité est assurée par des siéges en P.T.F.E. ( Poly Tetra Fluor Ethyléne maintenus en contact avec le tournant sphérique par un dispositif de serrage, collé sur le corps du robinet ou fixé sur ce même corps d'une façon statique. Ces dispositifs impliquent 11 emploi d'un joint conçu dans une matiére peu élastique et excluent tout rattrapage de jeu. In known devices of this kind, the seal is ensured by P.T.F.E. (Poly Tetra Fluor Ethylene kept in contact with the ball by a clamping device, stuck on the body of the tap or fixed on the same body in a static way. These devices involve the use of a seal designed in a little material. elastic and exclude any backlash.

Le dispositif suivant l'invention vise à assurer une plus grande étanchéité du fait du ressort qui assure un éventuel rattrapage de jeu dû à l'usure du joint ou à sa variation de volume suite au fluide qui est suceptible d'entrer en contact avec ce joint. The device according to the invention aims to provide greater tightness due to the spring which ensures possible backlash due to wear of the seal or to its variation in volume following the fluid which is liable to come into contact with it. attached.

Selon une variante de l'invention le rattrapage de jeu existe, mais ltétanchéité, au niveau du tournant, est assurée par un joint torique serti dans une bague en laiton qui le maintient en appui sur le tournant grâce a--un ressort, ce joint a une faible surface de contact avec le tournant sphérique, de plus, si ce joint subit une variation de volume, il se déloge d'où perte totale d'étanchéite. L' étanchéité, au niveau du corps est, elle, assurée par un deuxiéme joint torique monté sur la même bague. According to a variant of the invention, the play catch-up exists, but the tightness, at the level of the turn, is ensured by an O-ring set in a brass ring which keeps it in abutment on the turn thanks to - a spring, this seal has a small contact surface with the ball, moreover, if this joint undergoes a variation in volume, it dislodges from where total loss of sealing. The tightness, at body level, is ensured by a second O-ring mounted on the same ring.

Le dispositif suivant l'invention, grâce à son joint monobloc, permet ces éventuelles variations de volume et offre une plus grande surface de contact avec le tournant, surface correspondant à une zone sphérique délimité~par un angle au centre d'au moins 170, d'où une plusgrande sécurité. The device according to the invention, thanks to its one-piece seal, allows these possible variations in volume and offers a greater contact surface with the turn, surface corresponding to a spherical zone delimited by an angle at the center of at least 170, hence greater security.

Le même joint assure également l'étanchéité au niveau du corps
Le dossier annexé illustre, à titre d'exemple un mode de réalisation du dispositif conforme à la présente invention.Same seal also seals at body level
The attached file illustrates, by way of example, an embodiment of the device according to the present invention.

Tel qu'il est représenté le dispositif comprend un joint moulé Oî , dans une matière élastique, ce joint assure une double étanchéité intérieure avec le tournant 2 et le corps 3 grâce à une bague cylindrique 0 et une douille 0 qui -servent de guidage et de maintient au joint, la pièce o assurant également le guidage du ressort qui vient s'appuyer sur le corps pour permettre le maintien constant du joint sur le tournant. De plus, quand le dispositif, objet de l'invention equipe un robinet à tournant sphérique soumis au passage d'un fluide, plus la pression de ce fluide est élevée, plus le joint est comprimé sur les parois du tournant et du corps donc plus l'étanchéité est importante et plus la sécurité est accrue. As shown, the device comprises a molded seal O, in an elastic material, this seal ensures a double internal seal with the turn 2 and the body 3 thanks to a cylindrical ring 0 and a sleeve 0 which serve as a guide and holding the joint, the part o also guiding the spring which comes to bear on the body to allow the constant maintenance of the joint on the turn. In addition, when the device, object of the invention equips a ball valve subjected to the passage of a fluid, the higher the pressure of this fluid, the more the seal is compressed on the walls of the turn and of the body therefore more sealing is important and more security is increased.

Le dispositif objet de l'invention peut être utilisé pour tous les robinets à tournant sphérique et tout particuliérement dans le cas de robinets d'arrêt pour le passage de gaz d'une pression de 0,2 bars jusqu'à 4 bars et même beaucoup plus.  The device object of the invention can be used for all ball valves and especially in the case of stop valves for the passage of gas from a pressure of 0.2 bar up to 4 bar and even a lot more.

Claims (2)

REVENDICATIONS 1) Dispositif d'étanchéité intérieure d'un robinet à tournant sphérique constitué par un joint monobloc armé ( pièces 1 4 5 ) assurant une double étanchéité intérieure par son contact avec le tournant 2 et le corps 3, permettant d'augmenter la sécurité dans un robinet gaz, caractérisé par la surface importante du joint en contact avec le tournant, surface correspondant à une zone sphérique délimité par un angle au centre d'au moins 170. Ce joint étant associé à un ressort de rattrapage de jeu. 1) Internal sealing device of a ball valve constituted by a reinforced monobloc seal (parts 1 4 5) ensuring a double internal sealing by its contact with the turning 2 and the body 3, making it possible to increase safety in a gas tap, characterized by the large surface of the seal in contact with the turn, surface corresponding to a spherical zone delimited by an angle at the center of at least 170. This seal being associated with a play take-up spring. 2) Dispositif selon la revendication 1 caractérisé par la masse compacte du joint 1 en ôlastomôre, maintenu et guidé in- térieurement et extérieurement par une douille 5 et une bague 4 indépendantes, en laiton qui grâce à l'action du ressort 6 lui permettent certaines variation de volume sans nuire à sa fonction d'étanchéité,  2) Device according to claim 1 characterized by the compact mass of the seal 1 in ôlastomôre, maintained and guided internally and externally by a sleeve 5 and a ring 4 independent, in brass which thanks to the action of the spring 6 allow it certain variation in volume without affecting its sealing function,
FR8123480A 1981-12-14 1981-12-14 Seal for spherical gas valve - has elastomer body and gives double inner sealing to increase safety Granted FR2518212A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8123480A FR2518212A1 (en) 1981-12-14 1981-12-14 Seal for spherical gas valve - has elastomer body and gives double inner sealing to increase safety

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8123480A FR2518212A1 (en) 1981-12-14 1981-12-14 Seal for spherical gas valve - has elastomer body and gives double inner sealing to increase safety

Publications (2)

Publication Number Publication Date
FR2518212A1 true FR2518212A1 (en) 1983-06-17
FR2518212B1 FR2518212B1 (en) 1984-08-10

Family

ID=9265087

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8123480A Granted FR2518212A1 (en) 1981-12-14 1981-12-14 Seal for spherical gas valve - has elastomer body and gives double inner sealing to increase safety

Country Status (1)

Country Link
FR (1) FR2518212A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064902A1 (en) * 2002-01-29 2003-08-07 Philip George Doust Washer assembly
ITUB20152741A1 (en) * 2015-07-31 2017-01-31 Renato Colombo BALL VALVE STRUCTURE.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR932896A (en) * 1943-07-28 1948-04-05 Saunders Valve Co Ltd Improvements related to fluid control valves
US3118650A (en) * 1961-02-28 1964-01-21 Sargent Engineering Corp Ball valve construction
FR1521110A (en) * 1966-04-27 1968-04-12 Saunders Valve Co Ltd Regulating valve for fluids
DE1750613A1 (en) * 1967-06-01 1971-01-28 Philips Nv Shut-off device with a spherical shut-off body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR932896A (en) * 1943-07-28 1948-04-05 Saunders Valve Co Ltd Improvements related to fluid control valves
US3118650A (en) * 1961-02-28 1964-01-21 Sargent Engineering Corp Ball valve construction
FR1521110A (en) * 1966-04-27 1968-04-12 Saunders Valve Co Ltd Regulating valve for fluids
DE1750613A1 (en) * 1967-06-01 1971-01-28 Philips Nv Shut-off device with a spherical shut-off body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003064902A1 (en) * 2002-01-29 2003-08-07 Philip George Doust Washer assembly
ITUB20152741A1 (en) * 2015-07-31 2017-01-31 Renato Colombo BALL VALVE STRUCTURE.

Also Published As

Publication number Publication date
FR2518212B1 (en) 1984-08-10

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